JP2021083996A - Chair substrate for nestable chair - Google Patents

Abstract

To provide a substrate for a nestable chair which is formed so that a support part for supporting the seat body in lying down posture and a buffer member can show smart designability invisible from the outside in the chair in use.SOLUTION: The seat cover 2 for installing a seat body 12 and the bracket 3 for connecting the seat cover 2 are equipped with a connection mechanism which, by supporting a torsion spring 8, is connected by a support shaft 7 that is passed through the shaft hole of the seat cover 2 and the bearing of the bracket 3. The connection mechanism and the support part 6 are arranged so as to be housed in the lower face of the seat cover 2 in the lying down posture.SELECTED DRAWING: Figure 12

Description

In the present invention, a seat body in which the seat surface and the backrest are integrated (this seat body includes the backrest and a separate seat surface; the same shall apply hereinafter) is also referred to as a repulsive force of a torsion spring (hereinafter, also referred to as a spring force). ) Can be used to change the posture from a sitting posture (posture when used) substantially parallel to the floor surface to a standing posture (posture when not in use), and stacking on the floor surface in the front-rear direction (hereinafter referred to as nesting). Regarding the substrate for forming the chair.

Conventionally, by stacking (stacking) in the vertical direction or stacking (nesting) in the front-rear direction when not in use, the occupied area when not in use can be reduced and the space efficiency when storing can be improved. There is a chair that I made.

There are two types of chairs that can be nested, one is a type that undulates the seat body with the seat surface and the backrest integrated, and the other is the type that undulates only the seat surface that is separate from the backrest. Is known from Patent Documents 1 to 3 and the like.

In a nestable chair having a seat body with an integrated backrest and seat surface, the seat body and legs are connected via a connecting mechanism to rotatably support the seat body from a lying posture to an upright posture. When the connecting mechanism is provided on the left and right sides of the lower surface of the seat, the left and right sides of the seat, etc., a cover member for covering the connecting mechanism is provided, but the cover member is provided at a position conspicuous from the outside. It may be annoying. Further, in some conventional nesting chairs, a support portion that supports the lying posture of the sitting body during use is provided at a prominent position of the leg portion. Further, when the legs are provided with a cushioning member for orderly arranging the chairs at the same time as preventing the chair components to be damaged due to collisional arrangement of the chairs to be nesting, it is annoying together with the support portion. The feeling becomes greater.

Japanese Patent No. 3321727 JP-A-2007-130478 Japanese Patent No. 6527623

According to the present invention, in a nesting chair in which a seat body and legs are undulatingly connected via a connecting mechanism, the connecting mechanism is housed inside a seat receiving cover which is arranged on the lower surface of the seat body and supports the seat body. In addition, a support portion of the seat body in the prone position and a cushioning member for preventing scratches and ensuring alignment during nesting are arranged inside the lower surface of the seat cover, and the support portion and the cushioning member are used in the chair. The challenge is to provide a base for a chair that can be nested so that it can exhibit a smart design that cannot be seen from the outside.

The structure of the substrate of the present invention made for the purpose of solving the above problems is a seating cover for attaching a seating body having a seating surface and a backrest integrated (including a seating surface separate from the backrest) on the upper surface, and the seating surface. A bracket in which the bearing cover is rotatably connected from an inverted posture substantially parallel to the floor to an upright posture at a desired angle via a torsion spring and a support shaft, and a support portion that supports the bracket and the seat bearing cover in the inverted posture. It is a base of a chair that can be nested and includes a leg portion including a lateral member provided with a support, and the seat support cover and the bracket support the torsion spring and form a shaft hole of the seat support cover and a bearing of the bracket. It is characterized in that it includes a connecting mechanism connected by the passing support shaft, and the connecting mechanism and the support portion are arranged so as to fit on the lower surface of the seat bearing cover in a lying posture.

In the present invention, the lateral member is provided with the bracket facing forward toward the center of the lateral member and the support portion on the opposite side thereof on the lower surface side of the seat cover, and further nesting on the lateral member or the support portion. Occasionally, a cushioning member is provided that comes into contact with the base or seat of the front or rear chair. With this configuration, the support part that supports the lying posture of the seat and the cushioning member for scratch prevention and alignment during nesting are almost invisible from the outside when the chair is used, so it demonstrates a smart design.

The cushioning member provided near the center of the lateral member comes into contact with the support portion of the front chair during nesting. Instead of being provided on the lateral member, the cushioning member may be provided integrally with the seat support cover on the lower surface of the support portion or the seat support cover in the vicinity of the support portion. The tip of the seat surface of the rear chair comes into contact with the cushioning member integrated with the support portion and the seat support cover while being buffered. When a magnet is embedded in the cushioning member provided on the horizontal member to give a magnetic force, the magnet attracts a support made of a magnetic material such as steel, so that the alignment of the chairs to be nested is supported.

In the leg portion, two leg frames forming a frontal view gate shape formed by the horizontal member and the vertical member are arranged in the front-rear direction, and the left-right width of the front leg frame is formed to be larger than the left-right width of the rear leg frame. At the same time, the vertical members of the front and rear leg frames are connected by the front and rear horizontal members so as to form a substantially inverted V shape in the side view, and the horizontal members are arranged on the lower surface of the seat body, and the horizontal members fall down in the plan view. It is almost hidden under the seat in the posture and cannot be seen. As a result, the nesting chair using the substrate of the present invention can give a novel impression to the nesting chair in which only the legs can be seen under the seat surface when the user is viewed in a standing posture.

The chair base connecting mechanism is provided with a rotation restricting mechanism for the seat cover, and when the seat cover rotates from the lying position on the upright side, the stopper wall abuts on the bracket to rotate the seat cover upright. It is restricted to the standing angle set for the seat body.

The bearing cover has an insertion hole in which the front end side of the bracket enters from below at the front end of the upper surface of a substantially dish-shaped body, and the upright angle of the bearing cover erected beside the insertion hole is coordinated with the bracket. The bracket provided with a stopper wall regulated by action and entering the insertion hole has a bearing at the tip portion coaxial with the shaft hole of the stopper wall.

Since the rotation regulation mechanism is formed by the configuration of the stopper wall integrated with the seating cover to be connected and the bracket itself, the structure is simple, easy to assemble, and less likely to cause a failure without the need for individual independent dedicated parts.

The torsion spring has its repulsive force at a position including the middle between the standing angle of the seat body or the seat surface including the seat receiving cover when not in use and the lodging angle when used and the front and back thereof (hereinafter referred to as an intermediate position). ), The seat body or the seat surface is adjusted so as to be substantially in equilibrium with the load acting on the torsion spring.

Since the repulsive force of the torsion spring is adjusted as described above, the seat receiving cover on which the seat is placed is pushed in the standing direction with a hand attached to the seat at an intermediate position between the standing angle and the lodging angle. When it stands up and pushes in the lodging direction, it falls down by its own weight of the seat body that overcomes the repulsive force of the torsion spring, and moves gently at the standing end and the down end without any impact.

Further, the torsion spring is provided with high stability because the support shaft inserted into the coil portion is provided so as to penetrate the shaft holes of the support wall and the stopper wall provided on the seat support cover and the bearing of the bracket. It is installed inside the bearing cover. Further, one end side of the torsion spring is detachably fixed to the fixing system of the leg including the bracket, and the other end side is detachably fixed to the movable system of the seat support cover. The spring force (repulsive force) of the torsion spring can be adjusted by changing the fixed position of the fixing system with respect to the circumference of the support shaft to adjust the spring force acting on the seat body. Since the support shaft of the torsion spring is supported by a plurality of sets of shaft holes and bearings, the connection between the seat cover and the bracket is made high in strength and stability.

The seat support cover and the support portion are provided with a contact holding member at the seat support cover or the support portion to which the seat support cover abuts, and the seat is provided at the end of the lodging rotation of the seat body including the seat support cover. The contact holding member can assist the maintenance of the state in which the receiving cover is in contact with the support portion.

In the substrate of the present invention, the support portion may be formed of a magnetic material such as steel, and the seat cover may be configured to include a magnet as a contact holding member at a portion that contacts the support portion. The magnet can be provided on the seat cover in a non-contact state with the support portion so as not to make a metallic noise at the time of contact or to prevent the magnet from hitting the support portion and damaging the coating film.

A contact support member is provided on the seat support cover or the support portion to which the seat support cover abuts, and the seat support cover abuts on the support portion at the end of the lodging rotation of the seat body including the seat support cover. The state can be maintained by the contact holding member.

In a state where the stopper wall of the seat cover is in contact with the bracket at the end of the standing rotation of the seat, when a click member that elastically engages with the seat cover is provided on the bracket, the click member is released. The seat support cover can be elastically engaged and the contact can be known by a click feeling, and the seat support cover can be held at the contact position.

The brackets are installed at two locations near the center of the lateral member. As a result, the connecting mechanism between the seat cover and the bracket is located approximately in the center of the lateral member. Further, the bracket is formed of a pipe body having two standing walls whose tip portions are separated from each other, and the bearing of the support shaft is provided on the two standing walls. The bracket acts as a regulating wall for a stopper wall in which the upper wall of the tubular body rotates upright.

The support walls provided on the seat support cover are erected on the left and right sides of the insertion holes of the brackets provided on the seat support cover, and are positioned so as to sandwich the tip of the bracket to be inserted into the insertion holes from below. The stopper wall of the seat cover is provided at a position sandwiched between the two standing walls at the tip of the bracket.

The present invention comprises a connecting mechanism in which a seating cover and a bracket are connected by a support shaft that supports a torsion spring and is passed through a shaft hole of the seating cover and a bearing of the bracket in a base of a chair that can be nested. The support portion that supports the connecting mechanism and the seat body in the prone position is accommodated on the lower surface of the seat support cover in the prone position, and the support portion and the cushioning member that secures alignment with the damaged hat during nesting are also the seat. Since it is placed so that it fits inside the underside of the bearing cover, when applied to a nesting chair, it demonstrates a smart design that is not like a nesting chair, in which only the seat and legs of the chair can be seen in the standing posture of a person when using it. To do.

FIG. 3 is a perspective view of an example of a nesting chair using the substrate of the present invention. Front view of the chair in Figure 1. Rear view of the chair in Figure 1. Right side view of the chair in Figure 1. Bottom view of the chair in Figure 1. Right side view of the chairs of FIGS. 1 to 5 in which the seats are erected. The side view which shows the relationship between the support part of the seat cover and the cushioning member at the time of nesting. FIG. 6 is an enlarged cross-sectional view of part A in FIG. An enlarged plan view showing the seat cover by removing the seat body of the chairs of FIGS. 1 to 5. The bottom view of the seat cover of FIG. Enlarged perspective view of the seat cover with the seat removed. The perspective view which disassembled the seat cover of FIG. An enlarged side view schematically showing the relationship between the stopper wall and the bracket of the connecting mechanism between the seat cover and the bracket.

Next, an example of an embodiment of a chair in which a seat can be placed on the substrate of the present invention will be described with reference to the drawings.
In the figure, reference numeral 1 denotes a seat body provided with a seat surface 1a and a backrest 1b, and on the side of the drawing, the seat surface 1a and the backrest 1b are made of a synthetic resin molded body. The configuration of the seat body 1 is not limited to the example shown in the figure as long as the seat surface 1a and the backrest 1b are integrated, and may have other forms. In some seats 1, the seat surface 1a and the backrest 1b are separate bodies. In this embodiment, the seat body 1 includes a backrest and a separate seat surface.

Reference numeral 2 denotes a seat receiving cover formed of a shallow-bottomed dish-shaped body having a substantially dish-like shape on which the seat body 1 can be detachably installed on the upper surface. The seat cover 2 is provided with two insertion holes 2a having a substantially rectangular shape in a plan view, in which a bracket 3 described later can be inserted from below near the center of the front end portion, as shown in a flat state in FIG. 7 and a bottom state in FIG. ing. On the upper surface of the seat cover 2, two support walls 2b sandwiching the insertion holes 2a from the left and right and two stopper walls 2c sandwiched between the two support walls 2b are provided. .. The support wall 2b and the stopper wall 2c are integrally molded with the seat cover 2. The support wall 2b and the stopper wall 2c are provided with a shaft hole Sh through which the support shaft 7 described later passes, and a bearing Sb provided at the tip of the bracket 3 corresponds to the coaxial with the shaft hole Sh. 2e is a mounting portion provided with a bolt hole for passing the seat surface (not shown) separate from the seat body 1 or the backrest, and is provided at four locations near the outer periphery of the seat receiving cover. As a result, a plurality of types of seat bodies 1 having different designs can be attached to the seat support cover 2. Since it is necessary to use the bolt hole 2e when the seat body 1 of the chair is removed and the rotation mechanism inside the seat cover 2 is maintained, the seat cover 2 needs to be held in the prone position. .. Therefore, two jig holes 2f are provided in the front portion of the seat cover 2 in order to hold the seat cover 2 in the prone position. When a pin-shaped jig member (not shown) is inserted into the jig hole 2f, even if the seat cover 2 tries to stand up, the jig member hits the cushioning member 9 provided on the horizontal member 4b, which will be described later, and the seat cover 2 Since the standing rotation of the seat cover 2 is prevented, the seat cover 2 can be held in a substantially horizontal posture for maintenance work.

According to the above configuration of the seat cover 2 and the bracket 3, all the members constituting the connecting portion between the seat cover 2 and the bracket 3 for raising and lowering the seat 1 are formed by the upper surface of the seat cover 2 and the lower surface of the seat 1. It fits in the internal space of the seat cover 2 and does not expose the connecting portion and the rotation regulating mechanism to the outside.

Reference numerals 4 and 5 are two leg frames forming a front view gate shape having horizontal members 4a and 5a substantially parallel to the floor on the left and right vertical members 4b and 5b, and are on the front side (front) for nesting. The left-right width of the left and right vertical members 4b of the leg frame 4 when viewed from the front is formed to be larger than the left-right width of the left and right vertical members 5b of the leg frame 5 on the other side (rear). The two leg frames 4 and 5 are integrated so that the lateral members 4a and 5a overlap each other in the front-rear direction to form a leg portion.

The vertical members 4b and 5b of the combined front and rear leg frames 4 and 5 are formed in a substantially inverted V shape in the side view. With this configuration, when the chair of the present invention is viewed from the viewpoint of a person's standing posture, it seems that only the front and rear leg frames 4 and 5 extend diagonally downward from one place on the lower surface of the seat cover 2. This is a design feature.

Two brackets 3 and 3 are provided so as to project in parallel toward the front of the seat cover 2 near the center of the integrated lateral members 4a and 5a of the leg frames 4 and 5, and the above. A support portion 6 having a substantially U-shape in a plan view is provided in the direction opposite to the bracket 3. The support portion 6 is a member that supports the lying posture of the seat body 1 from below. The lateral members 4a and 5a are provided with a cushioning member 9 that comes into contact with the support portion 6 of the front chair during nesting. The cushioning member 9 may be installed at the center of the support portion 6 or on the lower surface of the seat cover 2 instead of the lateral members 4a and 5a. When the cushioning member 9 is provided on the support portion 6 or the seat cover 2, the tip end portion of the rear chair to be nested is buffered. The cushioning member 9 of the seat cover 2 is integrally molded when the seat cover 2 is a resin molded product. Reference numerals 4c and 5c are casters provided at the lower ends of the vertical members 4b and 5b of the leg frames 4 and 5.

The bearing cover 2 and the bracket 3 have a shaft hole Sh coaxially with the support wall 2b and the stopper wall 2c integrally molded on the bearing cover 2, and two insertion holes of the bearing cover 2. The left and right brackets 3 exposed from 2a on the upper surface side of the seat cover 2 have bearings Sb coaxially with the shaft hole Sh. When the support shaft 7 is arranged through the shaft hole Sh and the bearing Sb, the seat cover 2 and the bracket 3 are rotatably connected.

Since the support shaft 7 is fitted and inserted into the coil portion of the torsion spring 8, the torsion spring 8 is arranged together with the support shaft 7 at the front end portion of the seat cover 2. One end 8a of the arranged torsion spring 8 is fixed to the movable system by the seat cover 2, and the other end 8b is fixed to the fixed system of the leg frames 4 and 5 including the bracket 3. 81a is a fixing member for fixing the one end 8a to the seat cover 2. Since the fixing member 81a is attached by pressing one end 8a of the torsion spring 8 against the lower surface of the seat cover 2 with the screw 81b, it is virtually impossible for the fixing member 81a to be pressed down and the screw 81b to be tightened by one person. It is possible. However, when the front end side of the fixing member 81a is hooked on the locking portion (not shown) provided on the seat cover 2 to be supported, the front end side of the fixing member 81a is hooked on the locking portion on one side. Since the fixing member 81a can be pressed by hand and the screw 81b can be tightened by the other hand, assembly becomes easier. The torsion spring 8 urges the bracket 3 and the seat cover 2 rotatably connected by the support shaft 7 to the side where the seat cover 2 stands up.

In the substrate of the present invention, the standing angle of the seat body 1 placed on the seat support cover 2 is set in the range of 60 degrees to 30 degrees, preferably about 45 degrees to 35 degrees as an example. In this setting, the repulsive force (spring force) of the torsion spring 8 is such that the seat body 1 at an intermediate position between the lodging angle and the standing angle of the seat body 1 is substantially balanced with the load acting on the torsion spring 8. I'm adjusting. When the spring force is substantially balanced with the load at the intermediate position of the seat body 1, the spring force of the torsional spring 8 acts on the torsional spring 8 when the seat body 1 is in a lying position (approximately parallel to the floor). Since the load is smaller than the load of the seat body 1 (the balance between the load of the seat body 1 rotating to the lodging side and the spring force is lost), the seat body 1 rotates to the lodging side by its own weight and reaches the lodging end. Can maintain a prone position without the need for.

In the nesting chair using the substrate of the present invention, the load of the seat body 1 acting on the torsion spring 8 and the repulsive force of the torsion spring 8 are balanced at an angle intermediate between the standing angle and the lodging angle of the seat body 1. Therefore, the load on the spring force gradually decreases during the standing operation from the intermediate position to the standing end of the seat 1, and the seat 1 gently stands. The standing end can be known by the upper surface 22c of the stopper wall 2c provided on the seat cover 2 coming into contact with the upper wall 3a on the inner surface of the bracket 3, and is held at that position by a spring force. On the other hand, when the seat body 1 falls down, the load on the spring force of the seat body 1 after the intermediate position gradually increases, so that the seat body 1 gently falls down. The lodging end can be known by contacting the contact portion 21 provided on the lower surface 2d of the seat receiving cover 2 with the upper surface 6a of the support portion 6 provided on the leg frames 4 and 5, and the weight of the seat 1 is at that position. Is held at.

Further, in the chair, the spring force of the torsion spring 8 acts on the torsion spring 8 in an intermediate posture (an angle at an intermediate position between the standing angle and the lodging angle) between the standing posture (standing angle) and the lying posture (tilting angle). It is adjusted to balance with the load of the seat 1. As a result, the seat body 1 reaches the standing end end by the spring force because the load on the spring force of the seat body 1, whose posture changes as it stands up, gradually decreases from the intermediate posture toward the standing end end side. .. On the other hand, from the midpoint where the spring force and the load of the seat resistance 1 are balanced toward the lodging end, the seat body 1 falls horizontally and the load on the spring force gradually increases, so that the seat body 1 is the spring. It reaches the end of lodging due to its own weight while receiving the buffering action of the force. In this way, the seat body 1 performs a gentle undulating operation because the spring force is adjusted so as to be in equilibrium with the load of the seat body at the intermediate position of the undulating range.

The standing end of the seat body 1 that stands up gently as described above can be known by the contact between the stopper wall 2c and the bracket 3 (the upper surface 22c of the stopper wall 2c abuts on the upper wall 3a of the bracket 3). As an example, as shown schematically in FIG. 11, when the click member 3b having the convex portion 33b that elastically engages with the seat cover 2 in the standing end posture is arranged on the bracket 3, the convex portion is arranged. Since 33b elastically engages with the seat cover 2 at the standing end of the seat 1, the contact can be known with a click feeling. In FIG. 11, when a piece-shaped click member 3b having the elastic convex portion 33b is arranged on the bracket 3 and the seat support cover 2 rotates toward the standing end side, the recessed edge 23c of the seat receiving cover 2 that stands up is formed. Since the convex portion 33b is flipped and engaged with the click member 3b, it is possible to obtain a click feeling at the standing end of the seat 1 and maintain the posture of the standing end by this series of operations.

The lodging end of the seat body 1 can be known by contacting the lower surface 2d of the seat support cover 2 with the upper surface 6a of the support portion 6, and the contact state can be maintained by the own weight of the seat body 1 including the seat support cover 2. To know this lodging end with a click feeling, for example, a contact made of synthetic resin having a magnet 21a as a contact holding member against the lower surface 2d of the seat cover 2 facing the upper surface 6a of the support portion 6. It is preferable to provide the portion 21. Then, when the contact portion 21 of the seat cover 2 abuts the lodging end of the seat body 1 against the supporting portion 6, the magnet 21a attracts the supporting portion 6, so that the lodging end is accompanied by a click feeling due to the attraction of the magnetic force. The seat body 1 can be held in that position. The magnet 21a may be provided on the surface or inside of the contact portion 21, or the contact portion 21 itself may be formed of a magnet. Further, the magnet 21a may be provided on the side of the support portion 6. Further, a member that holds the contact between the two members 2 and 6 by the engaging force due to friction may be provided between the support portion 6 and the seat cover 2 instead of the magnet. It is desirable that the magnet 21a is provided on the other side to be attracted in a non-contact manner. Therefore, in the example shown in FIG. 8, the surface of the magnet 21a is exposed and embedded in the contact portion 21.

In the substrate for the nesting chair of the present invention, since the support portion of the seat body in the lying posture and the cushioning member at the time of nesting are provided so as not to be seen from the outside in the chair at the time of use, the nesting chair capable of demonstrating a smart design can be provided. Can be formed. Further, since different types of seats having different designs can be replaced with the seating covers of the base of the present invention having the same specifications, a plurality of types of nesting chairs having different designs can be formed by using a single chair base.

1 sitting body
2 Seat cover 3 Brackets 4 and 5 Leg frame 6 Support part 7 Support shaft 8 Torsional spring 9 Cushioning member

Claims (5)

A seat cover that attaches a seat body with an integrated seat surface and backrest (including a seat surface that is separate from the backrest) to the upper surface, and a lying posture in which the seat support cover is substantially parallel to the floor via a torsion spring and a support shaft. A base of a chair that can be nested, comprising a bracket that is rotatably connected between standing postures at a desired angle and a leg that includes a lateral member with a support that supports the bracket and the seat cover in a lying position. There,
The seat support cover and the bracket are provided with a connecting mechanism that supports the torsion spring and is connected by the shaft hole of the seat support cover and the support shaft that is passed through the bearing of the bracket.
The base of the chair, wherein the connecting mechanism and the support portion are arranged so as to be accommodated on the lower surface of the seat support cover in the lying posture. The lateral member is provided with the bracket facing forward toward the center and the support portion on the opposite side thereof, and further, the lateral member or the support portion is provided with a cushioning member that comes into contact with the base of the front or rear chair during nesting. The substrate of claim 1. The substrate according to claim 2, wherein the cushioning member is provided near the center of the lateral member and comes into contact with the support portion of the front chair during nesting. The cushioning member is the substrate according to claim 2 or 3 having a magnetic force. In the leg portion, two leg frames forming a frontal view gate shape formed by the horizontal member and the vertical member are arranged in the front-rear direction, and the left-right width of the front leg frame is formed to be larger than the left-right width of the rear leg frame. At the same time, the vertical members of the front and rear leg frames are connected by the front and rear horizontal members so as to form a substantially inverted V shape in the side view, and the horizontal members are arranged on the lower surface of the seat body, and the horizontal members fall down in the plan view. The substrate according to any one of claims 1 to 4, which is substantially hidden under the seat in a posture and cannot be seen.

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