JP7393888B2 - Construction method for round stairs and round stairs - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rotating staircase and a method for constructing the same.

Conventionally, a circular staircase in which a plurality of treads are arranged radially around a core pillar is generally well known. In this circular staircase, a plurality of treads are arranged in a stepped manner with risers interposed between the upper and lower treads, and the inner ends of the treads are fixedly attached to different height positions of the core post. However, there is a problem in that it is difficult to install the inner ends of the plurality of treads onto the core pillar using support materials.

Specifically, there are three reasons. First, there are two types of structures in which multiple treads are arranged in a round staircase: a nosing core storage structure and a riser core storage structure. A straight line passing through the riser board is arranged so as to pass through the center of the core post, whereas in the riser core storage structure, a straight line passing through the riser board arranged below each tread is arranged so as to pass through the center of the core post. The mounting position of the receiving member relative to the core column changes depending on the double-core housing structure.

Secondly, square timbers are used as core pillars, but the thickness of the core pillars (the length of one side of the square timber) may vary, and depending on the thickness of the core pillar, the center of the support material The mounting position relative to the pillar changes. Furthermore, if the thickness of the core pillar is thin, the installation space for the support material will be small.

Thirdly, as a tread storage method in which the outer end of the tread is stored in the side plate (stringer) located on the outside of the winding staircase, a plurality of tread insertion grooves that are open to the rear are formed in the inner surface of the side plate in a stepped shape. , a general side plate storage method in which the outer end of each tread plate is inserted into this tread insertion groove from the rear side and fixed, and a plurality of tread plate mounting parts are formed in a step shape on the top surface of the side plate, and the outer end of the tread plate is fixed. There is a baseboard mounting method in which the tread plate is placed and fixed from above on the tread mounting part, and the mounting direction of the tread board in both types is different. Therefore, it is necessary to specify the mounting direction of the treadboard relative to the support material, taking into consideration the difference in the mounting direction of the treadboards of both types, making it difficult to design the support material.

On the other hand, as shown in Patent Document 1, for example, a plurality of plate-shaped intermediate support members are attached to the side surface of the wall corresponding to the core pillar, and a receiver on which the inner end of each step board is placed and fixed. A circular staircase structure with fittings (receptacles) attached has been proposed.

Japanese Patent Application Publication No. 10-196078

However, in the above-mentioned Patent Document 1, the tread storage method in which the outer end of the tread is stored in the side plate located on the outside of the winding staircase is such that the outer end of the tread is placed from above on a plurality of tread placement parts on the upper surface of the side plate. It is a baseboard storage method where it is fixed in place. Therefore, even if you try to slide the outer end of the tread from the rear using the side plate storage method, in which the outer end of the tread is inserted into the tread insertion groove of the side board from the rear, the intermediate support member will interfere with the construction. Can not. In other words, the device of Patent Document 1 is not compatible with the general side plate storage method, and the problem remains unsolved.

In addition, a plurality of intermediate support members are required in addition to the holders for each tread, and the number of members constituting the stairs increases, which increases the number of construction steps, which is problematic in terms of construction savings. Moreover, it is necessary to process the intermediate support member to a special dimension, which increases processing time.

The present invention has been made in view of these points, and its purpose is to eliminate the need for an intermediate support member by devising the structure of a tread holder that supports the inner end of the tread of a winding staircase on a core post. Instead, the treads can be installed regardless of the difference in the structure of the core of the treads, the thickness of the core pillar, or the method of storing the treads on the side panels on the outside of the staircase. It's about trying to make things easier.

In order to achieve the above object, in this invention, a tread side positioning part is provided in advance on the tread board, and a holder side positioning part is provided in the tread receptacle attached and fixed to the core post, and the positioning of both positioning parts is performed. The inner end of the treadle is positioned and fixed to the core post.

Specifically, the first invention includes a core post and at least one tread plate arranged around the core post with a riser interposed therebetween, and the tread plate has a straight line passing through the nosing of the tread plate. A step nosing core storage structure arranged so as to pass through the center of the core post, and a riser core storage structure arranged so that a straight line passing through the riser board placed below the tread passes through the center of the core post. On the other hand, the surrounding staircase being constructed is targeted.

This round staircase is provided with a round stair holder device that is fixed to the core post and includes at least one tread holder for supporting the inner end of the tread. The tread plate receiver is provided exclusively for the tread plate so as to correspond to the tread plate, and the tread plate side positioning portion is provided in advance at a different position for each tread plate. It is a groove formed on the bottom surface .

The above-mentioned footboard receiver includes a mounting portion that is fixedly attached to the core post at a mounting position corresponding to the footboard, and a receiving portion that projects from the mounting portion and receives the footboard.

The receiving portion includes a receiving portion that positions the tread plate and the tread plate receiver by fitting (engaging) with the tread side positioning portion of the tread plate in the step nosing core storage structure or the riser core storage structure. a tool-side positioning section and a mounting section for placing and fixing the inner end of the stepboard positioned between the stepboard receivers by the receiver -side positioning section; The tool side positioning portion is a protrusion that fits into the groove .

At least one of the position of the tread side positioning part of the tread board and the position of the holder side positioning part of the tread board holder in the direction around the core post is determined by the core housing structure and the thickness of the core post (one side of the square piece). It is characterized by being set according to the length).

In this first invention, the rotating staircase receiver device includes at least one tread receiver corresponding to at least one tread on the rotating staircase, and the tread receiver is dedicated to the tread so as to correspond to the tread. The mounting portion is used to fix the stairway at a mounting position corresponding to the tread on the core pillar of the round staircase. A receiving portion is provided in a protruding manner on the mounting portion, and the inner end portion of the tread having the nosing core storage structure or the riser core storage structure is placed and fixed on the placement portion of the receiving portion. At this time, the protruding stripes of the receiving part, which serve as the receiver side positioning part, fit into the grooves on the bottom surface of the treadle, which serve as the treadle side positioning parts, which are provided in advance at different positions for each treadle. As a result, the treadle is positioned and fixed relative to the treadle support. In addition, in the treadle support, the treadle support part is protruded from the attachment part to the core post, and the treadle part and the attachment part are separated, so the tread nosing core storage structure or the riser Even if there are differences in construction due to the centering structure, the treadle can be stably supported in the receiving part, and it can easily accommodate differences in construction.

Further, the tread side positioning part is a groove on the bottom surface of the tread plate, and the tread plate is positioned with respect to the tread plate holder by fitting the protruding strip as the holder side positioning part of each tread plate receiver into this groove. Therefore, the position of the tread side positioning portion can be easily changed by simply changing the position of the groove formed on the bottom surface of the tread plate.

At least one of the tread-side positioning portion of the tread plate , that is, the position of the concave groove , and the holder-side positioning portion of the tread plate holder , that is, the position of the protruding strip in the circumferential direction of the core column, is determined by the core housing structure and the thickness of the core column. The position of the inner end of the tread with respect to the core pillar may vary depending on the position of the tread, such as if the tread is arranged in a nosing core-containing structure or a riser core-containing structure, or if the thickness of the core pillar differs in size. Even if it changes, at least one of the position of the tread side positioning part (concave groove) and the position of the receiver side positioning part (convex strip) around the core column is changed in accordance with the change. By changing the position of the tread side positioning part and the positioning part of the holder side in this way, it is possible to use one type of tread plate holder for the treadboard regardless of the core housing structure and the thickness of the core post, and This makes it easier to design receivers and construct surrounding stairs.

In addition, when constructing stairs using the baseboard mounting method, in which the outer end of the tread is placed and fixed from above on the tread mounting part of the side board, first attach the tread holder to the core post, The inner end of the tread plate may be placed and fixed on the pedestal part of the receiving part of the tread plate receiver, and the outer end part of the tread plate may be placed and fixed on the tread plate placement part of the side plate. On the other hand, when constructing using the general side board installation method in which the outer end of the treadle is inserted into the tread insertion groove on the inner surface of the side board and fixed, the inner end of the treadle is first placed in the mounting part of the receiving part of the treadle receiver. is fixed, the outer end of the treadboard to which the treadboard holder is fixed is inserted and fixed into the treadboard insertion groove of the side plate, and the treadboard holder to which the treadboard is fixed is attached to the core post. Therefore, regardless of whether the treadboard storage method for storing the outer end of the treadboard is a baseboard storage method or a side board storage method, the treadboard can be easily constructed.

In this way, the treads of a round staircase can be attached to the core pillar using one type of tread holder, which eliminates the need for intermediate support members as in the past, reducing the number of components that make up the staircase. Therefore, the number of construction man-hours and processing time are reduced accordingly, making it possible to save construction work.

Similar to the round staircase of the first invention, the second invention includes a core post and at least one tread plate arranged around the core post with a riser interposed therebetween, and the tread plate A step nosing core storage structure in which a straight line passing through the step nosing section is arranged so as to pass through the center of the core pillar, and a straight line passing through the riser board arranged below the tread is arranged so as to pass through the center of the core pillar. The target is a round staircase that is constructed at the same time as a riser core storage structure.

The rotating staircase is provided with a rotating staircase receiver device that is attached and fixed to the core pillar and includes at least one tread holder for supporting the inner end of the tread. The tread plate receiver is provided exclusively for the tread plate so as to correspond to the tread plate, and the tread plate side positioning portion is provided in advance at a different position for each tread plate. Contains multiple recessed nuts embedded in the

The above-mentioned footboard receiver includes a mounting portion that is fixedly attached to the core post at a mounting position corresponding to the footboard, and a receiving portion that projects from the mounting portion and receives the footboard.

The receiving part includes a receiving part side positioning part which screws into the above mentioned tread plate side positioning part of the tread plate in the step nosing core storage structure or the riser core storage structure to position the tread plate and the tread plate receiver. and a placement part for placing and fixing the inner end of the treadle positioned between the treadle holders by the holder-side locating part, the holder-side positioning part of the treadle holder. includes a fixing bolt that penetrates through the mounting portion and is threaded into each of the plurality of embedded nuts to fix the inner end portion of the footboard to the mounting portion.

At least one of the position of the tread side positioning part of the tread board and the position of the holder side positioning part of the tread board holder in the direction around the core post is determined by the core housing structure and the thickness of the core post (one side of the square piece). It is characterized by being set according to the length).

In this second invention, similarly to the first invention, the rotating staircase receiver device includes at least one tread receiver corresponding to at least one tread in the rotating staircase, and this tread receiver It is provided exclusively for the tread so as to correspond to the tread, and is fixedly attached to a mounting position corresponding to the tread on the core post of the round staircase by its mounting portion. A receiving portion is provided in a protruding manner on the mounting portion, and the inner end portion of the tread having the nosing core storage structure or the riser core storage structure is placed and fixed on the placement portion of the receiving portion. At that time, the receiver side positioning part of the receiving part, that is, the fixing bolt passes through the mounting part and screws into the tread side positioning part, that is, the embedded nut embedded in the treadle, which is provided in advance at a different position for each treadle. As a result, the treadle is positioned and fixed relative to the treadle support. In addition, in the treadle support, the treadle support part is protruded from the attachment part to the core post, and the treadle part and the attachment part are separated, so the tread nosing core storage structure or the riser Even if there are differences in construction due to the centering structure, the treadle can be stably supported in the receiving part, and it can easily accommodate differences in construction.

In addition, the fixing bolts serving as the positioning part on the receiver side of each treadle plate pass through the mounting part and are screwed into the plurality of embedded nuts embedded in the treadle, thereby positioning the treadle with respect to the core pillar. Therefore, the tread plate side positioning portion can be easily changed by simply changing the position of the embedded nut embedded in the tread plate. In addition, the inner end of the tread can be fixed to the mounting part of the tread plate receiver by screwing and fastening the fixing bolt to the embedded nut, and the embedded nut and The fixing bolts can be used as both the step board side positioning part and the receiver side positioning part, respectively.

At least one of the tread side positioning part of the tread plate, that is, the position of the embedded nut, and the holder side positioning part of the tread board receiver, that is, the position of the fixing bolt in the circumferential direction of the core column, The position of the inner end of the tread with respect to the core pillar may change depending on the thickness of the tread, so if the tread is arranged in a nosing core storage structure or a riser core storage structure, or if the thickness of the core pillar differs in size, the position of the inner end of the tread with respect to the core pillar may change. Even if the position changes, at least one of the position of the tread side positioning part (embedded nut) and the position of the receiver side positioning part (fixing bolt) around the core column is changed in accordance with the change. By changing the position of the tread side positioning part and the positioning part of the holder side in this way, it is possible to use one type of tread plate holder for the treadboard regardless of the core housing structure and the thickness of the core post, and This makes it easier to design receivers and construct surrounding stairs.

In addition, when constructing stairs using the baseboard mounting method, in which the outer end of the tread is placed and fixed from above on the tread mounting part of the side board, first attach the tread holder to the core post, The inner end of the tread plate may be placed and fixed on the pedestal part of the receiving part of the tread plate receiver, and the outer end part of the tread plate may be placed and fixed on the tread plate placement part of the side plate. On the other hand, when constructing using the general side board installation method in which the outer end of the treadle is inserted into the tread insertion groove on the inner surface of the side board and fixed, the inner end of the treadle is first placed in the mounting part of the receiving part of the treadle receiver. is fixed, the outer end of the treadboard to which the treadboard holder is fixed is inserted and fixed into the treadboard insertion groove of the side plate, and the treadboard holder to which the treadboard is fixed is attached to the core post. Therefore, regardless of whether the treadboard storage method for storing the outer end of the treadboard is a baseboard storage method or a side board storage method, the treadboard can be easily constructed.

In this way, the treads of a round staircase can be attached to the core pillar using one type of tread holder, which eliminates the need for intermediate support members as in the past, reducing the number of components that make up the staircase. Therefore, the number of construction man-hours and processing time are reduced accordingly, making it possible to save construction work.

Similar to the circular staircase of the first invention, the third invention includes a core pillar and at least one treadboard arranged around the core pillar with a riser interposed therebetween, and the treadboard A step nosing core storage structure in which a straight line passing through the step nosing section is arranged so as to pass through the center of the core pillar, and a straight line passing through the riser board arranged below the tread is arranged so as to pass through the center of the core pillar. The target is a round staircase that is constructed at the same time as a riser core storage structure.

The rotating staircase is provided with a rotating staircase receiver device that is attached and fixed to the core pillar and includes at least one tread holder for supporting the inner end of the tread. The tread plate receiver is provided exclusively for the tread plate so as to correspond to the tread plate, and the tread plate side positioning portion is provided in advance at a different position for each tread plate. It includes a groove formed on the lower surface and a plurality of embedded nuts embedded in the footboard.

The above-mentioned footboard receiver includes a mounting portion that is fixedly attached to the core post at a mounting position corresponding to the footboard, and a receiving portion that projects from the mounting portion and receives the footboard.

The receiving portion is fitted (engaged) and screwed into the tread side positioning portion of the tread in the step nosing core storage structure or the riser core storage structure, thereby positioning the tread and the tread board receiver. a receiver-side positioning part for positioning the treadle, and a mounting part for placing and fixing the inner end of the treadle positioned between the treadle holders by the holder-side positioning part; The positioning part on the receiver side of the tool includes a protrusion that fits (engages) in the groove on the lower surface of the treadle, and a protrusion that is threaded through the mounting part and into the plurality of embedded nuts, respectively, to secure the inner end of the treadle. and a fixing bolt for fixing the part to the mounting part.

At least one of the position of the tread side positioning part of the tread board and the position of the holder side positioning part of the tread board holder in the direction around the core post is determined by the core housing structure and the thickness of the core post (one side of the square piece). It is characterized by being set according to the length).

This third invention can also achieve the same effects as the first invention and the second invention. That is, the rotating staircase receiver device includes at least one tread receiver corresponding to at least one tread on the rotating staircase, and the tread receiver is provided exclusively for the tread so as to correspond to the tread. The mounting portion is used to attach and fix the stairway at a mounting position corresponding to the tread on the core pillar of the round staircase. A receiving portion is provided in a protruding manner on the mounting portion, and the inner end portion of the tread having the nosing core storage structure or the riser core storage structure is placed and fixed on the placement portion of the receiving portion. At this time, the protruding stripes as the receiver-side positioning portion of the receiving portion fit (engage) with the grooves on the bottom surface of the treadle as the treadle-side positioning portions provided in advance at different positions for each treadle, and A fixing bolt serving as a receiver-side positioning portion passes through the mounting portion and is screwed into a footboard-side positioning portion provided in advance at a different position for each footboard, that is, an embedded nut embedded in the footboard. As a result, the treadle is positioned and fixed relative to the treadle support. In addition, in the treadle support, the treadle support part is protruded from the attachment part to the core post, and the treadle part and the attachment part are separated, so the tread nosing core storage structure or the riser Even if there are differences in construction due to the centering structure, the treadle can be stably supported in the receiving part, and it can easily accommodate differences in construction.

In addition, in this way, the convex strip as the holder-side positioning part of each tread plate receiver fits into the groove on the bottom surface of the tread plate, which serves as the tread-side positioning part, and each tread plate is fitted into the plurality of embedded nuts embedded in the tread plate. The fixing bolt, which serves as a positioning part on the receiver side of the receiver, passes through the mounting part and is screwed together, thereby positioning the treadle with respect to the core pillar. The footboard side positioning section can be easily changed by simply changing the positioning section. In addition, by screwing the fixing bolt onto the embedded nut, the inner end of the treadle can be fixed to the mounting part of the treadle receiver, so the embedded nut and fixing bolt are used to fix the treadle and the treadle receiver. can be used as both the step board side positioning part and the receiver side positioning part, respectively.

At least one of the tread side positioning portion of the tread plate, that is, the position of the recessed groove and the embedded nut, and the holder side positioning portion of the tread plate receiver, that is, the position of the protrusion and the fixing bolt in the circumferential direction of the core column, are located at the center of the tread plate. Since it is set according to the stowage structure and the thickness of the core post, the tread may be arranged with a nosing core stowage structure or a riser core stowage structure, or the thickness of the core post may be different in size, and the inner edge of the tread may be Even if the position of the part with respect to the core post changes, the position of the tread side positioning part (concave groove and embedded nut) and the core post of the receiver side positioning part (projection strip and fixing bolt) will be adjusted accordingly. At least one of the surrounding positions is changed. By changing the position of the tread side positioning part and the positioning part of the holder side in this way, it is possible to use one type of tread plate holder for the treadboard regardless of the core housing structure and the thickness of the core post, and This makes it easier to design receivers and construct surrounding stairs.

In addition, when constructing stairs using the baseboard mounting method, in which the outer end of the tread is placed and fixed from above on the tread mounting part of the side board, first attach the tread holder to the core post, The inner end of the tread plate may be placed and fixed on the pedestal part of the receiving part of the tread plate receiver, and the outer end part of the tread plate may be placed and fixed on the tread plate placement part of the side plate. On the other hand, when constructing using the general side board installation method in which the outer end of the treadle is inserted into the tread insertion groove on the inner surface of the side board and fixed, the inner end of the treadle is first placed in the mounting part of the receiving part of the treadle receiver. is fixed, the outer end of the treadboard to which the treadboard holder is fixed is inserted and fixed into the treadboard insertion groove of the side plate, and the treadboard holder to which the treadboard is fixed is attached to the core post. Therefore, regardless of whether the treadboard storage method for storing the outer end of the treadboard is a baseboard storage method or a side board storage method, the treadboard can be easily constructed.

In this way, the treads of a round staircase can be attached to the core pillar using one type of tread holder, which eliminates the need for intermediate support members as in the past, reducing the number of components that make up the staircase. Therefore, the number of construction man-hours and processing time are reduced accordingly, making it possible to save construction work.

A fourth invention is a circular staircase according to any one of the first to third inventions, in which the mounting portion of the tread receptacle is disposed at the mounting position of the core post, and the upper end portion or the lower end portion thereof is arranged at the mounting portion. It is characterized in that it is provided in a vertically elongated shape so as to come into contact with the mounting portion of another step board holder adjacent to the upper side or lower side of the tread plate holder.

In this fourth invention, the mounting portions of the tread plate holders are vertically elongated, and when the mount portions are placed in the mounting position and attached to the core post, the mount portions of two vertically adjacent tread plate holders are connected to each other. come into contact with When a tread plate holder is installed in such a manner that it is in contact with the mounting part of another adjacent tread plate holder, that tread plate holder will be positioned and installed at the mounting position, and can be easily positioned.

In a fifth invention, in the circular staircase according to any one of the first to fourth inventions, the mounting portion of the tread receiver has a groove portion having an L-shaped cross section that tightly engages with a corner portion of the core post. It is characterized by

In this fifth invention, the mounting part is positioned with respect to the core pillar simply by closely engaging the groove of the mounting part with the corner of the core pillar, and the mounting part is easily attached to the desired mounting position. becomes possible .

A sixth invention is a method for constructing a circular staircase according to any one of the first to fifth inventions, wherein after the tread holder is attached and fixed to the core post at the mounting part, The step board is positioned and placed on the placing part by the step board side positioning part and the receiver side positioning part, and is fixed.

In this sixth invention, when constructing a winding staircase using the winding staircase holder device, the tread holder is first attached and fixed to the core post at the mounting part, and after the mounting, the tread holder's receiving part is placed. The treadle is placed and fixed on the part in a positioning state by the treadle-side positioning part and the receiver-side positioning part. As a result, construction can be carried out using a baseboard mounting method in which the outer end of the treadle is placed and fixed from above on the treadle mounting portion of the side board.

A seventh invention is a method for constructing a round staircase according to any one of the first to fifth inventions, in which a tread plate is placed on a mounting part of a receiving part of a tread plate holder which is not attached to a core post. The tread plate is positioned and placed by the tread side positioning part and the receiver side positioning part, and the tread plate is fixed to the tread plate holder, and then the tread plate holder to which the tread plate is fixed is attached and fixed to the core post at the mounting part. It is characterized by

In this seventh invention, when constructing a round staircase using the round staircase receiving device, the tread is first placed on the mounting part of the receiving part of the tread board by the tread side positioning part and the receiving part side positioning part. The step board is placed in a positioned state, and the step board is fixed to the step board receiver in that state. Thereafter, the tread plate holder to which the tread plate is fixed is attached and fixed to the core post at the attachment portion. With this, it is possible to perform construction using a side plate storage method in which the outer end of the treadle is inserted into the tread insertion groove on the inner surface of the side plate and fixed.

As explained above, according to the present invention, when the inner end of the tread of a winding staircase is supported on the core post by the tread support, a groove is formed in the tread in advance as a tread side positioning part, or an embedded nut is installed in the tread. The tread receptacle has a mounting part that is fixed to the core post and a receiving part that protrudes from the mounting part and receives the tread, and the receiving part has a nosing core storage structure or a riser. A protrusion or fixing bolt as a positioning part on the receiver side that positions the tread with respect to the core pillar by fitting or screwing into the tread side positioning part of each tread in the core storage structure, or by fitting and screwing together. is provided, and at least one of the position of the tread side positioning part on the tread board and the mounting position of the mounting part of the tread plate receiver on the core pillar is set according to the core housing structure and the thickness of the core pillar. As a result, even if the position of the inner end of the tread relative to the core pillar changes due to differences in the core housing structure of the tread and the thickness of the core pillar, there is only one type for each tread regardless of the core housing structure and the thickness of the core pillar. Using this tread holder, you can easily design tread holders and construct a round staircase. Moreover, regardless of whether the tread board storage method for storing the outer end of the tread board is a baseboard storage method or a side board storage method, the tread board can be easily constructed. Furthermore, by eliminating the need for an intermediate support member, the number of stair components can be reduced, and the number of construction steps and processing steps can be reduced, resulting in construction savings.

FIG. 1 is a perspective view showing three tread receivers of a rotating staircase receiver device according to Embodiment 1 of the present invention. FIG. 2 shows the main body of the first step treadle receiver, with FIG. 2(a) being a plan view and FIG. 2(b) being a front view. FIG. 3 shows the attachment of the first stage footboard receiver, FIG. 3(a) is a plan view, and FIG. 3(b) is a side view. FIG. 4 shows the second stage footboard receiver, FIG. 4(a) is a plan view, and FIG. 4(b) is a front view. FIG. 5 shows a third step treadle receiver, with FIG. 5(a) being a plan view and FIG. 5(b) being a front view. FIG. 6 is a plan view showing the treads of the first to third stages. FIG. 7 is an enlarged cross-sectional view of the main part of the footboard. FIG. 8 is a perspective view showing the state in which the first to third stage tread plate receivers are attached to the core pillar, viewed from the rear side. FIG. 9 is a perspective view of a three-step circular staircase with a nosing core storage structure, viewed diagonally from the rear left side. FIG. 10 is a plan view of a round staircase with a nosing core storage structure. FIG. 11 is a plan view showing a state in which the positions of the protrusions of the tread plate receivers for the first to third stages are changed according to the thickness of the core post in the step nosing core storage structure, and FIG. 11(a) shows when the thickness of the core pillar is 105 mm, FIG. 11(b) shows when the thickness of the core pillar is 90 mm, and FIG. 11(c) shows when the thickness of the core pillar is 120 mm. show. FIG. 12 is a plan view showing a state in which the positions of the grooves and the tread receivers of the first to third stage treads arranged in the riser core housing structure are changed when the thickness of the core post is 105 mm. It is. FIG. 13 is a view corresponding to FIG. 1 showing a tread receptacle of a rotating staircase receptacle device according to Embodiment 2 of the present invention.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following description of the embodiments is merely illustrative in nature and is in no way intended to limit the present invention, its applications, or its uses.

(Embodiment 1)
9 and 10 show a three-step circular staircase S according to Embodiment 1 of the present invention. This round staircase S is constructed in the middle between the upper and lower floors of the building, and is a clockwise upward staircase when viewed from above. In the description, the side where the lowest step of the stairs S is located is referred to as the front, the opposite side is referred to as the rear, and left and right refer to the left and right sides when looking from the front side to the rear side.

The circular staircase S has a core pillar 1 (center pillar) located at the inner center in the circumferential direction, and as shown in FIG. 1, and are arranged vertically in series at a constant interval (the distance between the centers is, for example, 1000 mm). In addition, two rear columns 3, 3 are installed directly behind the core column 1 and the front column 2, respectively, so as to be lined up in series with a fixed interval (similarly, for example, 1000 mm) in the left and right direction. . That is, the core pillar 1, the front pillar 2, and the rear pillars 3, 3 are located in corresponding positions in the front and rear, respectively, and the front-to-back distance between them is the same as that between the core pillar 1 and the front pillar 2, and between the rear pillars 3, 3. (Similarly, for example, 1000 mm). The core pillar 1, the front pillar 2, and the rear pillar 3 are all tube pillars made of wood and have a square cross section and each side (the length of one side of the square timber) is 105 mm, for example. Note that the core pillar 1, the front pillar 2, and the rear pillar 3 may have a rectangular cross section.

On the right side of the front pillar 2 and the left rear pillar 3, a left wall base material 6 made of gypsum board or the like is arranged extending between the pillars 2 and 3 in the front-rear direction. This left wall base material 6 is fixed, for example, to the right side surfaces of both columns 2 and 3 with screws or the like. Further, in front of the two rear pillars 3, 3, a rear wall base material 7 made of gypsum board or the like is arranged extending in the left-right direction between the pillars 3, 3. The rear wall base material 7 is fixed at its right end to the front side of the right rear column 3 with screws or the like, with the left end abutting against the right surface of the left wall base material 6, for example.

Around the left and rear surfaces of the core pillar 1, there are three wooden materials from the first stage to the third stage that increase in order in the clockwise direction over an angle range of 90° in plan view from the lower stage to the upper stage. Stepboards 11 to 13 are installed at predetermined angular intervals (basically 30°). In the figure, the first to third steps (including the treads 11 to 13) of the circular staircase S are indicated by circled numbers.

As shown in FIG. 9, the upper end of the lower straight staircase S1 located at the bottom of the circular staircase S and rising at the rear is connected to the first step tread 11, which is the lowest step of the circular staircase S. . On the other hand, the lower end of the upper straight staircase S2, which is parallel to the lower straight staircase S1 and rises forward, is connected to the treadboard 13 of the third step, which is the topmost step, through a landing with a wide tread surface (not shown). .

FIG. 6(a) shows the step board 11 of the first stage, and FIG. 6(c) shows the step board 13 of the third step, viewed from the upper side (front side). Become. FIG. 6(b) similarly shows the second step board 12, and this step board 12 is made of a substantially diamond-shaped board. Each has a shape in which the inner corner part is cut out in a straight line or L-shape, and as shown in FIG. It abuts on the core pillar 1 at the notch. Further, each of the treads 11 to 13 has a step nosing portion 15 formed at the end on the lower step side.

As shown in FIGS. 6 and 7, on the lower surface (back surface) of each of the treads 11 to 13, a step nosing 15 is located at a position a certain distance L (for example, 30 mm) called a "nose protrusion" from the step nosing 15. A riser insertion groove 16 with a constant groove width (for example, 6 mm) extending parallel to the tread plate is formed over the entire length direction of the treads 11 to 13. (see) are fitted, and the lower end of the riser board 21 is fixed to the end of the lower treads 11, 12 on the side opposite to the step nosing 15.

Further, on the lower surface of each of the treads 11 to 13, on the side opposite to the step nosing 15 with respect to the riser insertion groove 16, there are, for example, two (plural) Embedded nuts 18, 18 are embedded and fixed. Each of these embedded nuts 18 is a so-called "onime nut" with a plurality of protrusions protruding from the outer periphery, and is fitted into a bottomed hole on the bottom surface of the tread plates 11 to 13 by driving, press-fitting, screwing, etc., and cannot rotate. It is fixed to prevent it from coming out. The formation of the riser insertion groove 16 and the embedding of the embedded nuts 18 and 18 in each of the treads 11 to 13, along with the formation of the recessed groove 19 (tread side positioning part) to be described later, are performed not at the construction site of the stairs S but at the time of manufacture. be exposed. In FIG. 7, reference numeral 17 denotes a groove-shaped anti-slip portion formed on the upper surface of the step nosing 15 of the treads 11 to 13.

The outer ends of the three treads 11 to 13 are usually fixedly supported by the side board storage method or the baseboard storage method, similar to a general round staircase. 9 and 10 show a side plate storage type fixed support structure. To explain the fixed support structure, a left side plate 23 is fixedly supported on the right side of the left wall base material 6 by the front column 2 and the left rear column 3. The left side plate 23 is provided with two step-shaped step plate insertion grooves 25, 25 in the horizontal direction, the rear side being higher. Both tread plate insertion grooves 25, 25 are open to the rear side, and the outer end of the first step tread plate 11 is inserted into the front tread plate insertion groove 25, and the rear tread plate insertion groove is higher than the front tread plate insertion groove 25. The left side portions of the outer ends of the second step tread plates 12 are respectively inserted into the grooves 25 from the rear side and fixed therein. In addition, a rear side plate 24 is disposed in front of the rear wall base material 7 in a state that is fixedly supported by the two rear pillars 3, 3, and this rear side plate 24 has a horizontal direction that increases in height toward the right side. Two step plate insertion grooves 25, 25 are formed in a stepped shape. Both tread plate insertion grooves 25, 25 are open to the right side, and the left tread plate insertion groove 25 is formed so as to be continuous at the same height position as the rear tread plate insertion groove 25 of the left side plate 20. The rear side of the outer end of the second step tread 12 is inserted into the insertion groove 25 from the right side, and the outer end of the third step tread 13 is inserted into the right side tread insertion groove 25 from the right side and fixed.

Although not shown, two vertical riser insertion grooves are formed on the left side plate 23, and a similar riser insertion groove is formed on the rear side plate 24 so as to be continuous with the tread insertion groove 25. The outer ends of the risers 21 below each of the treads 11 to 13 are fitted into these three riser insertion grooves, respectively.

On the other hand, in the baseboard storage type fixed support structure, although not shown, the upper part of the left side plate 23 and the rear side plate 24 is cut out in a stepped shape, so that the upper end of the left side plate 23 and the rear side plate 24 have a step-shaped cutout in the baseboard storage type fixed support structure. A tread support portion is formed at the same height as the insertion groove 25. That is, at the upper end of the left side plate 23, two step-shaped tread support parts are formed in the horizontal direction, the rear side being higher, and the outer end of the first step tread plate 11 is formed in the front tread support part. Further, the left side of the outer end of the second stage tread plate 12 is placed and fixed from above on the rear tread support part which is higher than the front tread support part. Further, at the upper end of the rear side plate 24, two horizontal tread support parts are formed in a stepped shape, increasing in height toward the right side, and the left tread support part is the same as the rear tread support part of the left side plate 23. They are formed so as to be continuous at the same height position, and the rear side of the outer end of the second stage tread plate 12 is connected to the left tread support part, and the outer edge of the third tread board 13 is connected to the right tread support part. The ends are each placed and fixed from above.

Further, as shown in FIG. 10, in the circular staircase S, the treads 11 to 13 of the three steps are constructed in a structure in which the tread nosings 15 of each tread 11 to 13 are inserted. It is arranged so as to pass through the center O of the core pillar 1.

As a feature of the present invention, as shown in FIG. 6 and FIG. A short groove 19 extending parallel to the riser insertion groove 16 is formed in the portion. This concave groove 19 forms a positioning part on the treadle side, and is arranged at a different position for each of the treadleboards 11 to 13, with one end in the length direction opening at the inner end of the treadleboards 11 to 13.

On the other hand, as shown in FIG. 8, on the rear surface of the core column 1, three upper and lower footboard holders 31 to 33 for the first to third stages are fixedly supported with vertical intervals. . The tread plate receiver 31 for the first stage is attached to the first tread plate 11, the tread plate receiver 32 for the second tier is attached to the first tread plate 12, and the tread plate receiver 33 for the third tier is attached to the first tread plate 13. It is specially designed to accommodate this. Each of these tread receivers 31 to 33 has an upper surface (the upper surface of a mounting portion 48 described later) at the same height as the four tread insertion grooves 25, 25, ... (three height positions) in the side plates 23, 24. The inner end of the first stage tread plate 11 is placed on the upper surface of the first stage tread plate holder 31 on the lower side, and the inner end of the first tier tread plate 11 is placed on the upper surface of the second tier tread plate holder 32 located midway between the upper and lower sides. The inner end portions of the second step tread plate 12 and the inner end portions of the third step tread plate 13 are respectively placed and fixed on the upper surface of the third step step plate receiver 33 located further above. That is, the three tread receptacles 31 to 33 are attached and fixed at different height positions of the core post 1 of the round staircase S, and are arranged in a stepped manner around the core post 1 with the riser board 21 interposed. The inner ends of the step boards 11 to 13 are supported, respectively. As shown in FIG. 1, a combination of these three tread plate holders 31 to 33 constitutes a rotating staircase holder device A.

Each of the above-mentioned footboard holders 31 to 33 is made of iron, for example, and includes a mounting portion 35 that is fixed to the mounting position corresponding to each of the footboards 11 to 13 on the core post 1, and a footboard attached to this mounting portion 35 in a plan view. Each of the receivers 31 to 33 is provided with a receiving portion 46 that protrudes at a different predetermined angle and receives the footboards 11 to 13.

Specifically, as shown in the lower part of FIG. 1, the first stage step plate receiver 31 includes a receiver main body 37 and an attachment 40 that is integrally welded and fixed to the receiver main body 37. As shown in FIG. 2, the receiver main body 37 is made of a plate material having a substantially L-shaped cross section bent at right angles when viewed in the vertical direction, and has a vertically long rectangular plate-shaped connecting portion 38 extending in the vertical direction on one side thereof. As shown in FIG. 3, the attachment 40 is made of a vertically elongated plate having an L-shaped cross section and bent at right angles when viewed in the vertical direction, and has a connecting portion 41 on one side. The attachment 40 is connected to and integrated with the receiver main body 37 by folding the connecting parts 38 and 41 of the receiver main body 37 and the attachment 40 and overlapping the outer surfaces and welding them together (see FIG. 2(a)). ing.

Note that the attachment 40 may be integrally connected to the receiver main body 37 by screwing. In that case, although not shown, for example, one of the connection parts 38 and 41 of the receiver main body 37 and the attachment 40 is formed with, for example, three connection holes arranged vertically, while the other is formed with three connection holes arranged vertically. For example, three sets (total of nine) of connecting holes are formed through the receiver body in a horizontally spaced manner, and one set of three connecting holes is formed through the receiver body. The attachment 40 may be connected and integrated with the receiver main body 37 by inserting a connecting screw into the matching connecting hole and screwing it into a nut. At this time, connecting holes formed through the other of the connecting portions 38 and 41 and lined up at regular intervals in the horizontal direction may be integrally connected to form a long hole extending in the horizontal direction.

In this way, the connection between the two connection parts 38, 41 can be made by changing the set of connection holes that match the three connection holes on one side of the connection parts 38, 41, or by changing the positions of the elongated holes. By relatively shifting the position, it is possible to change the front-rear position of the receiver main body 37 with respect to the attachment 40, that is, the front-rear position of the protrusion 54 (receiver-side positioning portion) in the circumferential direction of the core post 1. In the first step tread receiver 31, when changing the position of the mounting part 48 or the protruding strip 54, the attachment 40 can be connected without changing the mounting position on the rear surface of the core column 1 by the fixing part 43 of the attachment 40. It is only necessary to change the set of connecting holes in the portion 41 to change the relative position of the connecting portion 38 of the receiver main body 37 and the connecting portion 41 of the attachment 40, and the position of the mounting portion 48 and the protruding strip 54 can also be easily changed. .

The other side of the attachment 40 is a rectangular plate-shaped fixing part 43, and four mounting holes 44, 44, . . . arranged in the vertical direction are formed through the fixing part 43. The attachment portion 35 is constituted by the connection portion 38 of the receiver main body 37, the connection portion 41 of the attachment 40 connected to the connection portion 38, and the fixing portion 43 thereof. Then, as shown in FIGS. 8, 10, and 11(a), the fixing part 43 of the attachment 40 is brought into contact with the left side of the lower rear surface of the core column 1 with its bent outer surface, and at this time, the bent outer surface of the connecting part 41 is brought into contact with the left side of the lower rear surface of the core column 1. are arranged so that they are flush with the left side of the core post 1, and in this state, insert the mounting screws V (see Fig. 8) into the mounting holes 44, 44, ... of the fixing part 43 and screw them into the core post 1. By fastening, the first step tread receiver 31 is attached and fixed to the core post 1. Further, at this time, the attachment part 35 has a groove part 45 (V groove) having an L-shaped cross section formed between the connecting part 38 of the receiver main body 37 and the fixing part 43 of the attachment 40 (see FIG. (See imaginary line in FIG. 2), when the attachment portion 35 is attached to the core post 1, the rear left corner of the core post 1 is tightly engaged with the groove portion 45.

The receiver main body 37 has a substantially triangular plate-shaped receiver 46 that extends vertically and perpendicularly to the connecting portion 38 . As a result, the receiving portion 46 is parallel to the mounting portion 35 and protrudes at an angle of 180° with respect to the mounting portion 35.

The central portion of the receiving portion 46 is punched out in a triangular shape along the outer periphery to reduce weight. In this receiving part 46, a mounting part 48 extending horizontally on the side where the connecting part 38 is located is integrally formed on the upper surface of the distal end part on the side away from the connecting part 38 so as to be continuously bent from the receiving part 46. The inner end portion of the first step tread plate 11 is placed and supported on this placement portion 48.

Two bolt insertion holes 50, 50 are formed through the mounting portion 48. These bolt insertion holes 50, 50 are arranged so as to correspond to the two embedded nuts 18, 18 of the first step board 11 placed on the mounting portion 48 (in other words, the bolt insertion holes 50, 50 (embedded nuts 18, 18 are embedded so as to correspond to the bolt insertion holes 50, 50 of the step board receiver 31), and fixing bolts 51 (see FIG. 1) inserted into each bolt insertion hole 50 from below, By screwing and fastening each embedded nut 18 of the first step tread plate 11 placed on the placement portion 48, the first step step board 11 is fixed to the placement portion 48.

Further, on the upper surface of the base end portion of the receiving portion 46 near the connecting portion 38, a protrusion 54 of a constant height is integrally formed so as to extend the base end portion upwardly relative to the other portions. This protrusion 54 is a receiver side positioning portion for engaging with the groove 19 (stepboard side positioning portion) on the lower surface of the first step tread plate 11 to position the step plate 11 with respect to the first step step plate receiver 31. It consists of This protrusion 54 engages with the groove 19 on the lower surface of the first step board 11, and the step board 11 is positioned on the step board receiver 31, and in this state, the inner end of the step board 11 is embedded in the mounting part 48. It is fixed by fastening fixing bolts 51, 51 to nuts 18, 18.

The second-stage and third-stage tread plate receivers 32 and 33 are different from the first-stage tread plate receiver 31 and do not include an attachment 40. In addition, in the second-stage and third-stage tread plate receivers 32 and 33, the same parts as those in the first-stage tread plate receiver 31 will be described with the same reference numerals.

The second step tread receiver 32 is made of a plate material having a substantially L-shaped cross section bent at a certain angle (for example, 150°) when viewed in the vertical direction, as shown in the upper and lower center of FIG. 1 and in FIG. . In other words, the second step tread receiver 32 includes a vertically elongated rectangular plate-shaped mounting portion 35 extending in the vertical direction, and a substantially triangular plate extending in the vertical direction and protruding from the mounting portion 35 at the above-mentioned angle. The mounting portion 35 has four mounting holes 44, 44, . Then, as shown in FIGS. 8, 10, and 11(a), the mounting portion 35 is bent and its outer surface is brought into contact with the left and right centers of the upper and lower intermediate rear surfaces of the core column 1, and in this state, each mounting hole 44 is inserted into the mounting hole 44. By inserting the mounting screw V (see FIG. 8) and screwing it onto the core post 1, the second step tread receiver 33 is fixedly attached to the core post 1 at the mounting position.

Further, on the upper surface of the distal end of the receiving part 46, a placing part 48 is formed so as to extend horizontally toward the side where the mounting part 35 is located, and is bent continuously from the receiving part 46. The inner end of the step board 12 is placed and supported. Two bolt insertion holes 50, 50 are arranged in this mounting part 48 so as to correspond to the two embedded nuts 18, 18 of the second step board 12 placed on the mounting part 48, and are passed through the mounting part 48. The fixing bolts 51 (see FIG. 1) inserted from below into each bolt insertion hole 50 are screwed into each embedded nut 18 of the second step board 12 placed on the mounting part 48. By fastening, the second step board 2 is fixed to the mounting portion 48.

Further, a protruding ridge 54 extending upward from the base end portion of the receiving portion 46 on the attachment portion 35 side is integrally formed. This protrusion 54 has a receiver side positioning portion for engaging with the groove 19 (stepboard side positioning portion) on the lower surface of the second step tread plate 12 and positioning the step plate 12 with respect to the second step step plate receiver 32. When the protrusion 54 is engaged with the groove 19 of the second step board 12 and the step board 12 is positioned on the step board receiver 32, the inner end of the step board 12 is placed on the mounting portion 48. It is fixed by fastening the fixing bolts 51, 51 to the embedded nuts 18, 18.

As shown in the upper part of FIG. 1 and FIG. 5, the third step tread receiver 33 is made of a plate material having a substantially L-shaped cross section and bent at a certain angle (for example, 120°) when viewed in the vertical direction. The third step tread receiver 33 includes a vertically elongated rectangular plate-shaped mounting part 35 extending in the vertical direction, and a substantially triangular plate-shaped mounting part 35 that projects from the mounting part 35 at the above-mentioned angle. The mounting portion 35 has four mounting holes 44, 44, . . . formed therethrough. As shown in FIGS. 8, 10, and 11(a), the mounting portion 35 is bent and its outer surface is brought into contact with the right side of the upper rear surface of the core column 1, and in this state, the mounting screws ( (not shown) and is screwed and fastened to the core post 1, so that the third step tread receiver 33 is fixedly attached to the core post 1 at the mounting position.

Further, on the upper surface of the distal end of the receiving part 46, a placing part 48 extending horizontally to the side where the mounting part 35 is located is formed so as to be continuously bent from the receiving part 46. The inner end of the footboard 13 is placed and supported. Two bolt insertion holes 50, 50 are arranged in this mounting part 48 so as to correspond to the two embedded nuts 18, 18 of the third step board 13 placed on the mounting part 48, and are formed through the mounting part 48. The fixing bolts 51 (see FIG. 1) inserted into each bolt insertion hole 50 from below are screwed into each embedded nut 18 of the third step board 13 placed on the mounting part 48. By doing so, the third step tread plate 13 is fixed to the mounting portion 48.

Furthermore, a protrusion 54 extending upward from the base end is integrally formed on the upper surface of the base end of the receiving portion 46 . This protrusion 54 has a receiver side positioning portion for engaging with the groove 19 (stepboard side positioning portion) on the lower surface of the third step tread plate 13 to position the step plate 13 with respect to the third step step plate receiver 33. The protruding strip 54 engages with the groove 19 on the lower surface of the third step board 13, and when the step board 13 is positioned on the step board holder 33, the inner end of the step board 13 is It is fixed to the mounting portion 48 by fastening fixing bolts 51, 51 to the embedded nuts 18, 18.

Then, the mounting portions 35 of the first to third step tread holders 31 to 33 (the fixing portions 43 of the attachments 40 in the first tread holder 31) are horizontally attached to the rear surface of the core post 1. By changing the position, the position of the protruding strip 54 (receiver side positioning part) in the circumferential direction of the core column 1 is changed. In addition, the mounting portion 35 (fixing portion 43 of the attachment 40 in the first step tread holder 31) is made of a flat plate material, and both are mounted and fixed together on the rear surface of the core post 1, so that the mounting portion 35 can be fixed and fixed. Changing its position becomes easy.

The horizontal mounting position of the mounting portion 35 of each of the second and third step tread holders 32, 33 with respect to the rear surface of the core column 1 is determined by two types of mounting positions (not shown) provided for each tread holder 32, 33, for example. Determined using the paper pattern. This paper pattern has the same left and right width as the rear surface of the core material 1, and has a U-shaped cross section with both ends bent toward the front, and has mounting holes 44, 44 for each of the tread holders 32, 33 in the middle part. ,... are formed through the holes. Then, press this pattern to the desired height position on the rear surface of the core post 1 with the left and right ends of the pattern caught on the left and right sides of the core post 1, and mark the screw driving position on the rear surface of the core post 1 through the hole. It is now possible to add . In addition, when attaching the attachment part 35 to the rear surface of the core post 1, after removing the pattern paper, align the positions of the marks with the attachment holes 44, 44, ... of the attachment part 35, and in the matched state, A screw V is inserted through the ... and screwed into the core post 1. It should be noted that no pattern is provided for the first step tread holder 31, since the horizontal attachment position with respect to the rear surface of the core post 1 is determined by the groove 45. However, if necessary, a pattern with a similar function can be used.

As shown in FIG. 10, as shown in FIG. One or both of the position of the tread plate holders 31 to 33 (side positioning part) and the position of the protrusion 54 (receiver side positioning part) in the circumferential direction of the core post 1 are set.

By setting the height positions of the tread insertion grooves 25, 25, . The height between 11 and 13 (rise dimension) is, for example, 170 to 230 mm.

The treads 11 to 13 of the three steps mentioned above are constructed in a structure in which the tread nose core is housed in the core post 1, and the thickness of the core post 1 (the length of one side of the square timber) is 105 mm. 13 may be constructed with a riser core housing structure instead of a nosing core housing structure, or the thickness of the core pillar 1 may change from 105 mm to 90 mm or 120 mm. In that case, each of the treads 11 to 13 The position of the end with respect to the core column 1 changes. In this embodiment, in any case, by changing the position of the groove 19 on the lower surface of each tread plate 11 to 13 and the position of the protruding strip 54 of each tread plate receiver 31 to 33 in the circumferential direction of the core column 1, It is possible to carry out construction using the above three treadle holders 31 to 33 as they are.

To be more specific, in the riser core storage structure, as shown in FIG. It is a core storage structure that is arranged to pass through the center O of the pillar 1, and compared to the nosing core storage structure shown in FIG. It is arranged to be shifted toward the lower stage side by the length L of the nose protrusion between the groove 16 and the groove side surface on the step nosing part 15 side.

Therefore, in this riser core storage structure, the concave groove 19 on the lower surface of each of the tread plates 11 to 13 is formed at a position opposite to the step nosing part 15 by the length L of the nose protruding from the riser insertion groove 16, so that the tread plate 11 ~ 13 only relative to the tread plate holders 31 to 33 (core post 1), or move the protrusions 54 of the tread plate holders 31 to 33 to the center without changing the formation positions of the grooves 19 of the tread plates 11 to 13. Construction will be carried out by shifting it in the direction around the pillar 1. In the latter case, the structure is such that the footboard receivers 31 to 33 are shifted together with the footboards 11 to 13, and by shifting the mounting position of the mounting portion 35 on the rear surface of the core post 1 to the left, the protrusion 54 is moved in the circumferential direction of the core post 1. Just change the placement position to the left. In this case as well, the determination is made using a paper pattern provided for each of the treadle holders 31 to 33.

On the other hand, the same applies to changes in the thickness of the core post 1, and the positions of the protrusions 54 of the tread plate receivers 31 to 33 in the circumferential direction of the core post 1 may be changed, or the grooves 19 on the bottom surface of each of the tread plates 11 to 13 may be changed. Change position. FIG. 11 shows a state in which the positions of the protrusions 54 of the tread plates 31 to 33 change depending on the thickness of the core post 1 when the three treads 11 to 13 are arranged in the tread nose core storage structure. FIG. 11(a) shows a state in which the thickness of the core column 1 is 105 mm. When the thickness of the core post 1 is 90 mm, as shown in FIG. 11(b), the tread plate receivers 31 to 33 are shifted together with the tread plates 11 to 13, and the mounting position of the mounting portion 35 on the rear surface of the core post 1 is moved to the right side. By shifting it to , the position of the protruding strip 54 in the circumferential direction of the core column 1 is changed to the right side.

Furthermore, when the thickness of the core post 1 is 120 mm, as shown in FIG. By shifting the mounting position of the protrusion 54 to the left side from the position when the thickness of the core post 1 is 105 mm, the arrangement position of the protrusion 54 in the circumferential direction of the core post 1 may be changed to the left side.

The position of the groove 19 on the bottom surface of each of the treads 11 to 13 may be changed depending on the thickness of the core post 1. In that case, similar to the difference in the core storage structure described above, the larger the thickness, the more the groove 19 The distance from the step nosing 15 may be increased.

With the above configuration, the three-step winding staircase S according to the embodiment of the present invention has a plurality of treads 11 to 13 having a nosing core storage structure or riser It is constructed with a cored structure. In addition, in FIG. 9, 57 is a baseboard attached to the surface of the core post 1 excluding the treads 11 to 13 and the riser 21.

Next, a method of constructing a circular staircase S using the circular staircase receiving device A will be described. For each of the treads 11 to 13, during manufacturing, a concave groove 19 as a tread side positioning portion is formed in advance at a predetermined position on the lower surface (back surface) together with the riser insertion groove 16, and embedded nuts 18, 18 are embedded. ing.

When supporting the outer ends of each of the treads 11 to 13 to the side plates 23 and 24 using a fixed support structure using baseboard storage, first, use a pattern to attach the treads 1 to 1 to the 3rd tier to the core post 1. The footboard holders 31 to 33 are fixed with screws at the mounting portion 35 (see FIG. 8). The height position of each of the footboard holders 31 to 33 is determined so that the mounting portion 48 of the receiving portion 46 thereof is at the same height as the corresponding footboard support portions of the left side plate 23 and the rear side plate 24. In the first step tread receiver 31, the rear left corner of the core post 1 is inserted into the groove 45 having an L-shaped cross section between the connecting portion 38 of the receiver main body 37 and the fixing portion 43 of the attachment 40. Engage in close contact. The second step tread holder 32 has the mounting part 35 mounted on the left and right middle part of the upper rear surface of the core post 1, and the third stage tread receptacle 33 has the mounting part 35 mounted on the right side of the upper rear surface of the core post 1. Fasten each with screws.

After that, the tread plates 11 to 13 are bridged between the tread support parts of the left side plate 23 and the rear side plate 24 and the corresponding mounting parts 48 of the respective tread plate receivers 31 to 33, and the outer ends of the tread plates are supported. from above. The inner ends of the tread plates 11 to 13 are placed on the mounting portions 48 of the receiving portions 46 of the tread plate receivers 31 to 33, and the protrusions 54 of the receiving portions 46 are fitted into the grooves 19 on the lower surfaces of the tread plates 11 to 13. Then, the positions between the tread plates 11 to 13 and the tread plate receivers 31 to 33 are determined. In this position, the fixing bolts 51, 51 are inserted from below into the bolt insertion holes 50, 50 of the mounting parts 48 of the tread plates 31 to 33, and screwed into the embedded nuts 18, 18 on the lower surface of the tread plates 11 to 13. Then, the inner ends of the tread plates 11 to 13 are fixed to the tread plate receivers 31 to 33 by the fixing bolts 51 and 51. Further, a riser 21 is arranged between the treads 11 to 13, its upper end is inserted into the riser insertion groove 16 of the upper treads 12 and 13, and its lower end is inserted into the nosing part 15 of the lower tread 11 and 12. Secure it to the opposite end.

On the other hand, when supporting the outer ends of each of the treadboards 11 to 13 to the side plates 23 and 24 using a fixed support structure using the side board storage method, contrary to the above-mentioned baseboard storage method, first the treadboards 11 to 13 are Attach and fix the footboard receivers 31 to 33 to the inner end. That is, the inner ends of the tread plates 11 to 13 are placed on the mounting portions 48 of the receiving portions 46 of the respective tread plate holders 31 to 33, and the protrusions 54 of the receiving portions 46 are inserted into the grooves 19 on the lower surfaces of the tread plates 11 to 13. to position the tread plates 11 to 13 and the tread receivers 31 to 33. In this positioned state, the fixing bolts 51, 51 are inserted into the bolt insertion holes 50, 50 of the mounting part 48, and are screwed into the embedded nuts 18, 18 on the lower surface of the tread plates 11-13, and are tightened inside the tread plates 11-13. The ends are fixed to the footboard holders 31 to 33.

Next, the tread plates 11 to 13 with the tread plate holders 31 to 33 fixed to their inner ends in this manner are arranged between the left side plate 23 and the rear side plate 24 and the core post 1, and the outer ends of the tread plates 11 to 13 are fixed to the side plates. It is inserted into the step board insertion grooves 25 of 23 and 24 from the rear or right side and fixed. Thereafter, the tread plate receivers 31 to 33 of each of the tread plates 11 to 13 are screwed to the core post 1 at the mounting portion 35 and fixed. You can also use paper patterns at this time. Each of the tread holders 31 to 33 is raised so that the mounting portion 48 of the holder 46 is at the same height as the corresponding tread insertion groove 25 of the left side plate 23 and the rear side plate 24, and the tread plates 11 to 13 are horizontal. Determine the location. The method of attaching the tread plate holders 31 to 33 to the core post 1 is the same as the baseboard storage method. Fix it with a screw on the left side of the lower rear side. The second stage tread plate holder 32 has its mounting part 35 located at the left and right middle part of the upper rear surface of the core post 1, and the third stage tread board receiver 33 has its mounting part 35 located on the right side of the upper rear surface of the core pillar 1. Fasten screws to each part. Further, a riser 21 is arranged between the treads 11 to 13, its upper end is inserted into the riser insertion groove 16 of the upper treads 12 and 13, and its lower end is inserted into the nosing part 15 of the lower tread 11 and 12. Secure it to the opposite end.

Therefore, in the above embodiment, the rotating staircase receiver device A includes three types of tread receivers 31 to 33 corresponding to the three tread boards 11 to 13, respectively, and each tread receiver 31 to 33 is The part 35 is attached and fixed to the core post 1 of the rotating staircase S at the attachment position corresponding to each of the treads 11 to 13. A receiving portion 46 is provided in the mounting portion 35 so as to protrude at a different angle for each of the tread holders 31 to 33 in a plan view. The inner ends of each of the footboards 11 to 13 in the stowed structure are placed and fixed. At that time, the protruding strips 54 (receiver side positioning part) provided on the receiving part 46 engage with the grooves 19 (treadboard side positioning part) in each of the tread plates 11 to 13, and the tread plates 11 to 13 It is positioned and fixed relative to the tools 31 to 33. Incidentally, embedded nuts 18, 18 are embedded in the lower surfaces of the tread plates 11 to 13, and fixing bolts 51, which pass through bolt insertion holes 50, 50 of the receiving portions 46 of the tread plate receivers 31 to 33, are inserted into the embedded nuts 18, 18. 51 are screwed together, the tread plates 11 to 13 are connected not only to the engagement structure between the protrusion 54 of the receiving portion 46 and the groove 19 of each of the tread plates 11 to 13, but also by this threaded structure. 31 to 33 (see description of Embodiment 2 below).

The positions of the concave grooves 19 of the tread plates 11 to 13 and the positions of the protruding strips 54 of the tread plate receivers 31 to 33 in the circumferential direction of the core post 1 are different from those of the step nosing core storage structure or the riser core storage structure and the core pillar 1. Therefore, by arranging the treads 11 to 13 in a nosing core storage structure or a riser core storage structure, or by having the thickness of the core pillar 1 differ in size, each tread 11 Even if the position of the inner end of ~13 relative to the core post 1 changes, the position of the concave groove 19 in the tread plates 11 to 13 and the core post 1 of the protruding strip 54 in the tread plate receivers 31 to 33 are adjusted accordingly. One or both of the surrounding positions are changed. By changing the positions of the grooves 19 of the treads 11 to 13 and the positions of the protrusions 54 of the tread holders 31 to 33 around the core post 1, regardless of the core housing structure and the thickness of the core post 1, One type of tread plate receiver 31 to 33 can be used for each tread plate 11 to 13. As a result, the design of the tread holders 31 to 33 and the construction of the round staircase S become easier.

In addition, in each of the tread plate holders 31 to 33, a receiving part 46 for supporting the tread plates 11 to 13 is integrally provided on a mounting part 35 that is fixedly attached to the core post 1, and the receiving part 46 and the mounting part are connected to each other. 35 are provided apart from each other, for example, by adjusting the distance between the mounting portion 35 and the receiving portion 46 at the design or manufacturing stage, even if there are differences in construction, the distance between the mounting portion 35 and the receiving portion 46 can be adjusted. It becomes possible to stably support the treadboards 11 to 13, and it becomes possible to easily respond to differences in construction.

Furthermore, as mentioned above, when constructing the treadboards 11 to 13, if the outer ends are placed and fixed from above on the tread mounting portions of the side plates 23 and 24 using the baseboard mounting method, it is necessary to Attach the tread plate holders 31 to 33 to the core post 1, place and fix the inner ends of the tread plates 11 to 13 on the mounting part 48 of the receiving part 46 of the tread plate holders 31 to 33, and The outer end portions are placed and fixed on the footboard placement portions of the side plates 23 and 24. On the other hand, when performing construction using the general side plate fitting method in which the outer ends of the tread plates 11 to 13 are inserted and fixed into the tread insertion grooves 25 on the inner surfaces of the side plates 23 and 24, first the receiving parts in the tread plate receivers 31 to 33 are installed. The inner ends of the tread plates 11 to 13 are placed and fixed on the mounting portion 48 of the side plate 46, and the outer ends of the tread plates 11 to 13 to which the tread receivers 31 to 33 are fixed are inserted into the tread plates of the side plates 23 and 24. Insert and fix into the groove 25, and attach the tread receivers 31 to 33 to the core post 1. Therefore, regardless of whether the outer end portions of the tread boards 11 to 13 are stored in the baseboard storage method or the side board storage method, the tread boards 11 to 13 can be easily constructed.

In this way, each of the treads 11 to 13 can be attached to the core post 1 using one type of tread holder 31 to 33 corresponding to it, so there is no need to use an intermediate support member as in the past, and the stairs S Since the number of constituent members is reduced, the number of construction steps and processing steps are also reduced, resulting in a reduction in construction costs.

Furthermore, the tread side positioning part is the groove 19 on the lower surface of the tread plates 11 to 13, and the receiver side positioning part is the protrusion 54 of the receiving part 46, and by fitting the protrusion 54 into the groove 19, the tread plate 11 to 13 is positioned relative to the footboard holders 31-33. Therefore, when changing the position of the tread side positioning part, it is only necessary to change the position of the groove 19 on the bottom surface of the tread plates 11 to 13 (it is also necessary to change the position of the embedded nuts 18, 18), and the position of the tread side positioning part can be changed. can be easily done. Further, since the groove 19 is parallel to the riser insertion groove 16 formed on the lower surface of the treads 11 to 13, it can be formed using the same groove processing device at the same time as the riser insertion groove 16 is formed. Formation of the groove 19 becomes easy. In addition, since the protrusions 54 of the tread plate receivers 31 to 33 are plate portions that are simply an extension of a portion of the receiver portion 46, they can be easily formed.

Note that a plurality of grooves 19 are formed in parallel in advance on the treads 11 to 13, each corresponding to the core holding structure and the thickness of the core post 1, and one of the grooves 19 is formed during construction. You can also choose.

In addition, in the first step tread receiver 31, the mounting portion 35 is composed of a receiver body 37 and an attachment 40, and the connecting portion 38 of the receiver body 37 and the fixing portion 43 of the attachment 40 are arranged orthogonally. A groove portion 45 having an L-shaped cross section is formed between the two. Therefore, when attaching and fixing the mounting part 35 of the first step tread holder 31 to the core post 1 as described above, the groove 45 of the mounting part 35 is tightly engaged with the rear left corner of the core post 1. By simply doing so, the mounting portion 35 is positioned with respect to the core post 1, and the mounting portion 35 can be easily attached to the desired mounting position.

In addition, the groove part 45 of the attachment part 35 is provided by an intersection part where the connection part 38 of the receiver main body 37 and the connection part 41 of the attachment 40 are connected, as described above, but instead of being provided by an intersection part where the connection part 38 of the receiver main body 37 and the connection part 41 of the attachment 40 are connected, the groove part 45 is bent to have an L-shaped cross section. It can also be formed inside the corner of the plate material.

In the first embodiment described above, the embedded nuts 18, 18 embedded in the bottom surface of each of the footboards 11 to 13 are eliminated, and fixing screws (not shown) are used in place of the fixing bolts 51, 51, and each of the fixing screws is It is also possible to fix the tread plates 11 to 13 to the tread plate holders 31 to 33 by inserting them into the bolt insertion holes 50 of the receiving parts 46 of the tread plate holders 31 to 33 and screwing them onto the tread plates 11 to 13. In that case, the tread plates 11 to 13 are positioned relative to the tread plate holders 31 to 33 only by the engagement between the grooves 19 of the tread plates 11 to 13 and the protrusions 54 of the tread plates 31 to 33.

Further, embedded nuts 18, 18 on the lower surface of each of the tread plates 11 to 13, and fixing bolts 51 that are inserted into the bolt insertion holes 50, 50 of each of the tread plate receivers 31 to 33 and screwed into the embedded nuts 18, 18. , 51 remain the same as in the first embodiment, and in addition, a screw insertion hole (not shown) is newly provided at a position different from the bolt insertion holes 50, 50 in the receiving part 46 of each footboard holder 31 to 33. By inserting a fixing screw from the receiving part 46 into the screw insertion hole and screwing it into a part of the tread plates 11 to 13 that is different from the embedded nuts 18, 18, the tread plates 11 to 13 can be attached to the tread plate receivers 31 to 31. It can also be fixed at 33.

(Embodiment 2)
FIG. 13 shows Embodiment 2 of the present invention. Note that the same parts as in FIGS. 1 to 12 are given the same reference numerals, and detailed explanation thereof will be omitted.

In the second embodiment, the grooves 19 of the footboards 11 to 13 in the first embodiment are not provided, and only the embedded nuts 18, 18 are embedded in predetermined positions. Furthermore, the treadle receivers 31 to 33 do not have the protruding stripes 54, and the receiver portion 46 is provided with only a mounting portion 48 and two bolt insertion holes 50, 50. With this, the tread side positioning part is composed of the two embedded nuts 18 and 18 (embedded nuts) embedded in the tread boards 11 to 13, and the receiver side positioning part is configured to connect the mounting part 48 to the bolt insertion hole. The fixing bolts 51, 51 are screwed into embedded nuts 18, 18, respectively, in a penetrating state at 50, 50 to fix the inner end portions of the tread plates 11 to 13 to the mounting portion 48. The other configurations are the same as in the first embodiment.

Also in this embodiment, the same effects as in the first embodiment can be achieved. In particular, the screws are inserted into the embedded nuts 18, 18 embedded in the tread plates 11 to 13 and the bolt insertion holes 50, 50 of the mounting parts 48 of the tread plate receivers 31 to 33, and are screwed into the embedded nuts 18, 18. Since the tread plates 11 to 13 are positioned to the tread plate receivers 31 to 33 by the fixing bolts 51 and 51, the tread plate side positioning part can be easily changed by simply changing the position of the embedded nuts 18 and 18 on the tread plates 11 to 13. can do.

Furthermore, by screwing and fastening the fixing bolts 51, 51 to the embedded nuts 18, 18, the inner ends of the tread plates 11 to 13 can be placed and fixed on the mounting portions 48 of the tread plate receivers 31 to 33. The embedded nuts 18, 18 and fixing bolts 51, 51 for fixing the tread plates 11 to 13 to the tread plate receivers 31 to 33 can be used as the tread plate side positioning part and the receiver side positioning part, respectively.

Furthermore, since there are no concave grooves 19 on the tread plates 11 to 13 and ridges 54 on the tread plate receivers 31 to 33, the structure can be simplified to the extent that they are omitted.

(Other embodiments)
In the above embodiment, only the attachment part 35 (the fixing part 43 of the attachment 40 in the first stage tread holders 31 to 33) attached to the rear surface of the core post 1 of the tread plate holders 31 to 33 is in the vertical direction relative to the receiving part 46. It may be extended to form a vertically elongated shape, and in the attached state, it may come into contact with the attachment portions 35 of the upper or lower adjacent treadle receivers 31 to 33.

In this way, when the tread plate holders 31 to 33 are attached to the core post 1 in a state in which they are in contact with the mounting portions 35 of the vertically adjacent tread plate holders 31 to 33, the tread plate holders 31 to 33 are at the reference height. Therefore, the core pillar 1 can be easily positioned in the circumferential direction.

Furthermore, the above embodiment is applied to a round staircase S that ascends and descends over a range of 90° in plan view using three treads 11 to 13; A circular staircase in which multiple treads other than three steps are arranged in an arc within a 180° range, or a landing with square treads is formed in the middle, and straight stairs are connected to different sides of the treads. It can be applied to curved stairs where the tread changes by 90 degrees, and folded stairs where straight stairs are connected to different parts of the side of the same tread and the direction changes by 180 degrees. Just set it up. For example, if there is only one tread around the core post 1 in a round staircase that serves as the landing, it is sufficient to provide one tread holder corresponding to that one tread, and the holder device for a round staircase is It will consist of only one footboard holder.

The present invention uses one type of tread plate holder for each tread regardless of the core storage structure and the thickness of the core pillar, and the tread board storage method can be easily used regardless of whether the tread board storage method is a baseboard storage method or a side board storage method. It is extremely useful and has high industrial applicability because it can be used to construct treads.

S Circular staircase 1 Core post O Center 11 1st step tread 12 2nd step tread 13 3rd step tread 15 Step nosing 16 Riser insertion groove 18 Embedded nut (tread side positioning part)
19 Concave groove (tread side positioning part)
21 Riser board 23 Left side board 24 Rear side board 25 Treadboard insertion groove A Receptacle device for rotating stairs 31 Treadboard receiver for first step 32 Treadboard receiver for second step 33 Treadboard receiver for third step 35 Mounting part 37 Receptacle Main body 40 Attachment 43 Fixing part 44 Mounting hole V Mounting screw 45 Groove part 46 Receiving part 48 Placement part 50 Bolt insertion hole 51 Fixing bolt (receiver side positioning part)
54 Convex strip (receiver side positioning part)

Claims (7)

A core pillar, and at least one treadboard arranged around the core pillar with a riser interposed therebetween, the treadboard being arranged so that a straight line passing through the nosing of the tread passes through the center of the core pillar. A round staircase constructed with one of a step nosing core storage structure and a riser core storage structure arranged such that a straight line passing through the riser board placed below the tread passes through the center of the core column,
A winding staircase receiver device is provided, which is attached and fixed to the core post and includes at least one tread receiver for supporting an inner end of the tread board;
The tread plate receiver is provided exclusively for the tread plate so as to correspond to the tread plate,
The treadboard is provided with treadboard-side positioning parts in advance at different positions for each treadboard, and the treadboard-side positioning part is a groove formed on the bottom surface of the treadboard,
The above-mentioned treadle plate receiver includes a mounting part that is mounted and fixed at a mounting position corresponding to the treadboard on the core post, and a receiving part that protrudes from the mounting part and receives the treadboard,
The receiving part includes a receiving part side positioning part that positions the part between the tread plate and the tread plate receiver by fitting into the tread plate side positioning part of the tread plate in the step nosing core storage structure or the riser core storage structure. and a placing part for placing and fixing the inner end of the step board positioned between the step board receivers by the receiver side positioning part,
The holder-side positioning part of the tread plate holder is a protrusion that fits into the groove on the lower surface of the tread plate,
At least one of the position of the tread side positioning part of the tread board and the position of the holder side positioning part of the tread board holder in the direction around the core pillar is set according to the core housing structure and the thickness of the core pillar. A rotating staircase. A core pillar, and at least one treadboard arranged around the core pillar with a riser interposed therebetween, the treadboard being arranged so that a straight line passing through the nosing of the tread passes through the center of the core pillar. A round staircase constructed with one of a step nosing core storage structure and a riser core storage structure arranged such that a straight line passing through the riser board placed below the tread passes through the center of the core column,
A winding staircase receiver device is provided, which is attached and fixed to the core post and includes at least one tread receiver for supporting an inner end of the tread board;
The step board receiver is provided exclusively for the step board so as to correspond to the step board,
The treadboard is provided with a treadboard-side positioning portion in advance at a different position for each treadboard, and the treadboard-side positioning portion includes a plurality of embedded nuts embedded in the treadboard,
The above-mentioned treadle plate receiver includes a mounting part that is mounted and fixed at a mounting position corresponding to the treadboard on the core post, and a receiving part that protrudes from the mounting part and receives the treadboard,
The receiving part includes a receiving part side positioning part which screws into the above mentioned tread plate side positioning part of the tread plate in the step nosing core storage structure or the riser core storage structure to position the tread plate and the tread plate receiver. and a placing part for placing and fixing the inner end of the step board positioned between the step board receivers by the receiver side positioning part,
The holder-side positioning part of the tread plate holder includes fixing bolts that pass through the pedestal part and are screwed into the plurality of embedded nuts to fix the inner end of the tread plate to the pedestal part ,
At least one of the position of the tread side positioning part of the tread board and the position of the holder side positioning part of the tread board holder in the direction around the core pillar is set according to the core housing structure and the thickness of the core pillar. A rotating staircase. A core pillar, and at least one treadboard arranged around the core pillar with a riser interposed therebetween, the treadboard being arranged so that a straight line passing through the nosing of the tread passes through the center of the core pillar. A round staircase constructed with one of a step nosing core storage structure and a riser core storage structure arranged such that a straight line passing through the riser board placed below the tread passes through the center of the core column,
A winding staircase receiver device is provided, which is attached and fixed to the core post and includes at least one tread receiver for supporting an inner end of the tread board;
The step board receiver is provided exclusively for the step board so as to correspond to the step board,
The above-mentioned treadboard is provided with a treadboard-side positioning portion in advance at a different position for each treadboard,
The treadle side positioning part includes a groove formed on the lower surface of the treadle, and a plurality of embedded nuts embedded in the treadle,
The above-mentioned treadle plate receiver includes a mounting part that is mounted and fixed at a mounting position corresponding to the treadboard on the core post, and a receiving part that protrudes from the mounting part and receives the treadboard,
The receiving part includes a receiving part that positions between the treadboard and the tread plate receiver by fitting and screwing into the treadboard side positioning part of the treadboard in the step nosing core storage structure or the riser core storage structure. a side positioning part and a mounting part for placing and fixing the inner end of the treadle positioned between the treadle holders by the holder side positioning part;
The holder-side positioning part of the tread plate holder includes a convex line that fits into the groove on the lower surface of the tread plate, and a protrusion that fits into the groove on the lower surface of the tread plate, and a plurality of embedded nuts that are threaded through the mounting part and screwed into the inner end of the tread plate. and a fixing bolt for fixing the part to the mounting part,
At least one of the position of the tread side positioning part of the tread board and the position of the holder side positioning part of the tread board holder in the direction around the core pillar is set according to the core housing structure and the thickness of the core pillar. A rotating staircase. In any one of claims 1 to 3,
The mounting part of the tread plate holder is vertically elongated so that its upper end or lower end comes into contact with the mounting part of another tread plate holder adjacent to the upper or lower side of the mounting part when it is placed at the mounting position of the core post. A circular staircase built into the shape. In any one of claims 1 to 4,
The mounting part of the tread holder is a circular staircase having a groove part with an L-shaped cross section that tightly engages with the corner part of the core post. A method for constructing a circular staircase according to any one of claims 1 to 5, comprising:
After attaching and fixing the tread holder to the core post at the mounting part,
A method for constructing a winding staircase, in which a tread is positioned and placed on a mounting part of a receiving part of the tread holder by a tread side positioning part and a receiver side positioning part, and then fixed. A method for constructing a circular staircase according to any one of claims 1 to 5, comprising:
The treadle was positioned and placed by the tread side positioning part and the holder side positioning part on the mounting part of the treadle holder which was not attached to the core post, and the treadboard was fixed to the treadle holder. rear,
A method of constructing a round staircase in which a tread holder to which the tread is fixed is attached and fixed to a core post at a mounting part.

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