JP2005127036A - Standard frame for scaffolding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a standard frame reducing labor of release of lock metal fittings by half when a handrail frame is removed from the standard frame for a scaffolding used at a construction site or the like. <P>SOLUTION: The standard frame for the scaffolding constituted by providing a plurality of lock metal fittings for mounting the handrail or bracings is so formed that one of the lock metal fittings making a pair to vertical columns 51 and 52 forming the standard frame is used for a movable lock metal fitting 24 and that the other is used for a fixed lock metal fitting 23. For the standard frames, a shrine-entrance type standard frame and an H-frame are typical ones. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a scaffolding frame used in a construction site or the like.

  A framework scaffold used at a construction site or the like is usually formed by assembling a plurality of torii-shaped or H-shaped building frames composed of horizontal rails and vertical columns.

  After standing a plurality of building frames at right angles to the building at a predetermined interval, attaching and fixing a streak to the building frame to make the building frames self-supporting, then attaching and fixing the handrail frame In addition, a scaffolding board (cloth board) is laid on the horizontal rail of the building frame to form one unit of scaffolding. Next, after placing a separately prepared building frame on the already erected building frame and attaching and fixing the separately prepared strut and handrail frame to this building frame, the newly formed self-standing The scaffolding of the upper level is formed by suspending a separately prepared scaffolding plate on the horizontal frame of the building frame. In order to place another building frame on the building frame, the building column is usually placed by adding the vertical column of another building frame on the vertical column constituting the building frame. By repeating this sequentially, the entire framework scaffolding is formed.

  The building frame is provided with a plurality of lock metal fittings for attaching the struts and the handrail frame on the vertical column. When assembling the frame scaffolding from below, the struts and handrail frames are attached to the lock brackets provided on the vertical pillars of the building frame, and the struts and handrail frames are fixed to the building frame for each unit of scaffold. The

  Even when the frame scaffolding is disassembled sequentially from the top in the reverse operation, the struts and handrail frames are unlocked by unlocking the struts and handrail frames that are fixed to the vertical pillars of the building frame of the uppermost scaffold by lock metal fittings. Is removed from the uppermost building frame, and then the uppermost building frame is removed. Similarly, also for the lower scaffold, for each unit of the scaffold, the misalignment fixed on the building frame and the handrail frame are unlocked, and the attached misalignment and handrail frame are installed in the building frame. It will be removed from.

  Representative examples of the building frame are the torii type building frame and the H frame. The procedure for assembling the scaffolding will be described below assuming that three building frames are used per stage.

  The torii type building frame is a torii-shaped building frame having a horizontal rail at the top, and an example of forming a frame scaffold using this torii type building frame is shown in FIG. (a) is a front view, (b) is a right side view. Laying the floor plate 90 on the ground, standing up the three torii-type building frames 31 of the first step at right angles to the building at equal intervals, and creating a streak 8 on the building side of the building side vertical column By attaching and fixing to the two lock fittings 11 installed in 51, the first-stage torii type building frame 31 is self-supporting. And after attaching a handrail frame (not shown) on the road side to the two lock fittings 12 installed on the vertical pillar 52 on the road side of the building frame, the upper side rail of the first stage torii type building frame 31 A first-stage scaffolding plate 91 is bridged over 6 to form a first-stage scaffolding. Next, three torii type building frames are prepared separately, and the second torii type building frame 32 is newly placed on the vertical columns 51 and 52 of the first torii type building frame already erected. After the vertical columns 51 and 52 are placed and fixed, the streak 8 on the building side is attached and fixed to the two lock fittings 11 installed on the vertical column 51 on the building side of the building frame. The torii type building frame 32 is self-supporting. Then, after attaching a handrail frame (not shown) to the two lock fittings 12 installed on the vertical column 52 on the road side of the building frame on the road side, the upper side of the second stage torii type building frame 32 is fixed. A second-stage scaffolding plate 92 is formed on the crosspiece 6 to form a second-stage scaffolding.

  The H frame is an H-shaped building frame having a horizontal rail in the middle part, and an example of forming a frame scaffold using this H frame is shown in FIG. (a) is a front view, (b) is a rear view, and (c) is a right side view. A floor plate 90 is laid on the ground, and the three bottom building frames 40 are erected at equal intervals at right angles to the building. In this case, the bottom building frame 40 is not an H frame but an H frame. Use a building frame that is half the height of the frame. The lowermost building frame 40 is attached and fixed to the two lock fittings 11 installed on the vertical column 51 on the building side of the building frame on the building side by attaching a half-height and handrail frame 81 that is half the height of the H frame. Make them independent. A handrail frame 82, which is half the height of the H frame, is attached to and secured to the two lock fittings 12 installed on the vertical column 52 on the road side of the building frame, and then the lower part of the lowermost building frame 40 A first-stage scaffolding plate 91 is bridged on the horizontal rail 10 to form the lowest-stage scaffolding.

  Next, three H frames 41 are prepared, and the vertical position of the H frame 41 is placed on the vertical columns 51 and 52 of the lowermost building frame (a building frame having a half height of the H frame) 40 that has already been erected. After the columns 51 and 52 are placed and fixed, the first-stage H frame 41 is erected. By attaching and fixing a half-height staggered handrail frame 81 on the building side to the two lock fittings 11 installed in the upper half of the vertical column 51 on the building side of the H frame, the first step The H frame 41 is made independent. On the road side, a handrail frame 82 that is half the height of the H frame is attached to the two lock fittings 12 installed in the lower half of the vertical column 52 on the road side of the H frame 41. Is attached to two lock fittings 12 installed in the upper half of the vertical column 52 on the road side of the H frame 41. Then, a second-stage scaffolding plate 92 is formed on the intermediate crosspiece 7 of the first-stage H frame 41 to form a second-stage scaffolding.

  Next, three H frames 42 are separately prepared, and the vertical pillars 51 and 52 of the new H frame 42 are placed on the vertical pillars of the first-stage H frame 41 and fixed. Then, the second stage H frame 42 is erected. By attaching and fixing the half-height staggered and handrail frame 81 on the building side to the two lock fittings 11 installed in the upper half of the vertical column 51 on the building side of the H frame, the second stage The H frame 42 is made independent. On the road side, a handrail frame 82, which is half the height of the H frame, is attached to two lock fittings 12 installed in the lower half of the vertical column 52 on the road side of the H frame 42. Is attached to two lock fittings 12 installed in the upper half of the vertical column 52 on the road side of the H frame 42. Then, a third-stage scaffolding plate 93 is bridged on the intermediate crosspiece 7 of the second-stage H frame 42 to form a third-stage scaffolding.

  In this way, the building frame is attached and fixed to the building side with a striation or a handrail frame and to the road side.

  A hole (attachment hole) is opened at the tip of the streak, and after the attachment hole is fitted into the lock fitting of the building frame, the lock fitting of the lock fitting is operated and fixed. In addition, a plurality of fixing brackets with holes (mounting holes) at the tip are attached to the upper and lower stages of the handrail frame, and the mounting holes are fitted into the lock brackets of the building frame. It is fixed by operating the nail bracket. Note that the lock metal fitting has a length that allows fitting of at least two fixing brackets having a mounting hole at the tip or a handrail frame.

  The operation of the locking metal claws may be performed manually or may be performed automatically. There are a spring type and a gravity drop type that are automatically performed. FIG. 14 shows an example of the claw metal fitting 13 incorporated in the lock metal fitting 1. (a) is a spring type, and (b) is a gravity drop type. A spring 17 is incorporated in the spring-type claw fitting 13. In either case, when the attachment hole is inserted, the claw fitting 13 operates. That is, the claw fitting 13 moves in the direction of the arrow and is locked.

  FIG. 15 shows a state in which the spring-type claw fitting 13 incorporated in the lock fitting 1 operates. (a) is a side view of the lock fitting 1, and (b) is a front view. When the strut or the attachment hole 14 of the handrail frame is inserted into the lock fitting 1, the claw fitting 13 protruding outside is housed inside the lock fitting 1 and then comes out to the outside by the force of the built-in spring. This is a state in which the claw fitting 13 is activated, and the attachment hole 14 does not come off the lock fitting 1 even if a force is applied to the attachment hole 14 in the direction of the arrow unless the claw fitting 13 is housed inside the lock fitting 1 by an external force. Therefore, the striation or the handrail frame remains fixed to the building frame.

  A plurality of the lock fittings are provided on one building frame. The number of lock fittings required for one building frame differs depending on the striation provided between two adjacent building frames and the shape and number of handrail frames.

  FIG. 16 shows examples of various lines and handrail frames. (a) is an example in which an X-shaped strut is attached between adjacent building frames. (b) is an example in which one triangular stagger and handrail frame is attached between adjacent building frames. (c) is an example in which a strut made of one diagonal is attached between adjacent building frames. And (d) is the example which attached one handrail frame between adjacent building frames. Each has a plurality of mounting holes 14 for fitting the struts or the handrail frame to the lock fitting provided on the vertical column of the building frame.

  In the example of the above-mentioned torii type building frame (FIG. 12), the vertical bracket lock fitting on the building side of the building frame is attached in a cross shape between two adjacent building frames (FIG. 16 (a)). Therefore, two lock fittings are required on the building side of one building frame. And in the example of the above-mentioned H frame (FIG. 13), one triangular frame and handrail frame (see FIG. 16 (b)) is provided between adjacent building frames. Two or one is required on the side. Note that there may be only one streak between adjacent building frames (see FIG. 16 (c)). In this case, only one building frame may be provided on the building side.

  In addition, in the example of the above-described H frame (FIG. 13), the vertical bracket lock fitting on the road side of the building frame is between the building frames where the handrail frame (see FIG. 16 (d)) whose outer periphery is rectangular is adjacent. Since two pieces are provided at the top and bottom, four pieces are required on the road side of one building frame.

  However, since the building frames are generally used without distinguishing between the building side and the road side, the number of lock fittings is the same on the building side and the road side. In the case of the torii type building frame illustrated in FIG. 12, two are provided for each of the vertical columns, and in the case of the H frame illustrated in FIG. 13, four are provided for each of the vertical columns.

  No technical improvements have been made to the building frame lock fittings that are fitted into the mounting holes of the struts or the handrail frame for attaching the struts or the handrail frame to the scaffold building frame. For this reason, there is no literature on such a lock fitting for a building frame. Patent Document 1 describes an improved technique for a lock mechanism such as a clamp fitting for fixing a handrail frame so that there is no play after the handrail frame is fitted into the building frame. Lock fittings for attaching the frame are not described.

JP-A-6-307072

  In this way, with regard to building bracket lock fittings that are fitted into the attachment holes of the misalignment or handrail frame to attach the misalignment or handrail frame to the scaffolding frame, if the nail bracket of the lock bracket is activated, the external force As long as the claws are not moved inward, the striations or handrail frame will not come off the building frame. In addition, it is not necessary for the operator's hand to touch the nail tool directly to operate the lock fitting nail tool, and when attaching the misalignment or handrail frame to the building frame, the misalignment or the mounting hole of the handrail frame has a nail tool. The nail tool is activated simply by touching. Therefore, when assembling the scaffold, make sure that the lock bracket's claw fittings are operated by fitting the struts or the mounting holes of the handrail frame into the claw fittings of the lock fittings installed on the vertical columns of the building frame. A handrail frame should be attached.

  However, when the scaffolds are disassembled from the top in the reverse order, it is necessary to release the lock fittings from the vertical column of the building frame in sequence, but the lock fittings from the vertical column of the building frame must be released. In order to do this, it is necessary to take the trouble of removing the attachment hole of the handrail frame from the lock fitting in a state where the claw fitting is moved inward by an external force. In addition, since it is necessary to perform the work as many as the number of mounting holes to be fixed, the H frame is mounted four times in the example using the torii type building frame (see FIG. 12) for one building frame. In the case of the example used (FIG. 13), it is necessary to perform the removing operation six times.

  Also, the advantage of assembling the scaffold using the H frame as the building frame is that if the lock bracket that automatically operates is installed, even if it is on the scaffold plate of the lower H frame, the upper It is possible to attach a streak or a handrail frame to the lock fitting of the vertical column of the H frame.

  FIG. 17 shows a work diagram for assembling a scaffold using an H frame with a height of 1.8 m. (a) is an overall view, and (b) is an enlarged view of the vicinity of the worker's head. The worker 15 has already attached the building side railing and handrail frame 81 and is now trying to attach the roadside handrail frame 82. Since the lock bracket 21 that automatically operates is installed on the vertical column of the H frame, the worker 15 is installed at a height of 2.0 m while remaining on the scaffolding plate of the lower H frame. Not only the lock fitting 21 but also the lock fitting 22 installed at a height of 2.6 m can be provided with a building-side streak / handrail frame 81 and a road-side handrail frame 82. In this way, a streak or handrail frame can be attached to the vertical column lock fitting of the upper H frame while staying on the scaffolding plate of the lower H frame. In this case, both the struts and the handrail frame are already attached to both the building side and the road side, and the work at the upper stage can be performed safely.

  However, when the scaffold is disassembled in the reverse operation, when the operator removes the road-side handrail frame 82 and the building-side handrail frame 81 on the upper stage from the lower stage, the height becomes 2.0 m. The claw fitting 13 of the installed lock fitting 21 is at a height that can be released by hand, but the hand cannot reach the lock fitting 22 installed at a height of 2.6 m. Therefore, in order to release the claw fitting 13 of the lock fitting 22 installed at a height of 2.6 m, a dedicated disassembly jig is required.

  FIG. 18 shows a work diagram in the case of dismantling a scaffold assembled using an H frame having a height of 1.8 m. (a) is an enlarged view of the vicinity of the operator's head. The worker 15 is about to remove the handrail frame 82 on the road side. The claw fitting 13 of the lock fitting 21 installed at a height of 2.0 m could be released by hand, but the hand cannot reach the lock fitting 22 installed at a height of 2.6 m. Using this, the claw fitting 13 of the lock fitting 22 installed at a height of 2.6 m is being released. The operator 15 inserts the special disassembly metal fitting 16 into the lock metal fitting 22 as shown in (b), and rotates the special disassembly metal fitting 16 as shown in (c), thereby releasing the claw metal fitting 13.

  In this way, when disassembling the assembled scaffold, not only a dedicated disassembly jig is required, but also the operation of supporting the handrail frame with the remaining one hand while operating the dedicated disassembly jig with one hand is necessary. As a result, the worker lost his balance and the worker could fall from the scaffold.

  Therefore, when the scaffold is disassembled sequentially from above, it is necessary to reduce the trouble of sequentially releasing the claw brackets of the lock brackets provided on the vertical columns of the building frame when removing the struts or the handrail frame. In addition, it is required to protect the worker's safety by eliminating the need for a dedicated dismantling jig.

  As a result of various studies on the shape of the lock fitting provided on the vertical column of the building frame when removing the striation or the handrail frame, the present inventors obtained the following knowledge (1) to (7) .

  (1) One difference attached to the building frame is fixed by two or three lock fittings on the building side of the vertical column of the adjacent building frame as seen in FIGS. 16 (a) to (c), for example. ing. In addition, one handrail frame attached to the road side of the building frame (because it also has a function as a streak, it can also be attached to the building side. In this case, it becomes a streak and handrail frame), for example, FIG. As shown in (d), it is fixed by four lock fittings on the building side or road side of the vertical column of the adjacent building frame. In this way, a single misalignment or handrail frame is always fixed by a plurality of lock fittings provided on the vertical column of the building frame, regardless of the misalignment or the shape of the handrail frame.

  (2) Therefore, it is not necessary to exert the function of fixing the lock bracket or the handrail frame with only one lock bracket, and it is possible to fix the bracket or the handrail frame by combining two or more lock brackets. The function can be demonstrated.

  (3) That is, a lock fitting that fits into at least one of a plurality of mounting holes provided in one rail or a handrail frame is a movable lock fitting that is fixed by operating the claw fitting. There is no need, and if the shape of the fixed lock metal fitting is devised, a fixed lock metal fitting having no claw metal fitting may be used. Even if the fixed lock bracket itself does not have a lock operation function like a claw bracket, it can be used in combination with a movable lock bracket to interlock with the movement of the claw bracket of the movable lock bracket. Any shape may be used as long as the lock metal fitting is fixed.

  (4) Considering the case where one handrail frame is attached between two H frames, one handrail frame is provided with four attachment holes. Two lock fittings are required. At this time, the upper lock fitting that the worker cannot reach is a fixed lock fitting, and the lower lock fitting that the worker can reach is a movable lock fitting. Can be fixed to the vertical column.

  (5) Therefore, when assembling the scaffolding, first fit the two upper mounting holes of the handrail frame to the upper fixed lock fitting, and then attach the lower two handrail frames to the lower movable lock fitting. The handrail frame is fixed by fitting the holes and operating the claws. Unless the nail bracket of the lower movable lock bracket is released, the fixed lock bracket is also included, and the four attachment holes are not detached from the lock bracket, and the handrail frame remains fixed to the H frame.

  (6) Conversely, when disassembling the scaffold sequentially from above, first release the nail bracket of the lower movable lock bracket that can be reached by the worker's hand, then slide the entire handrail frame in a certain direction, If tilted to an angle, the mounting hole at the top of the handrail frame is detached from the fixed lock fitting at the top of the building frame, so that one handrail frame can be removed from the building frame.

  (7) The above is the case where the handrail frame is attached to the H frame, but the same applies to the case where it is attached to the torii type building frame instead of the H frame. The same applies to the case of using a streak or a streak and handrail frame instead of the handrail frame. The arrangement of the fixed lock metal fitting and the movable lock metal fitting provided on the vertical column of one building frame may be paired on the upper and lower sides adjacent to each other.

  The building frame according to the present invention has been completed based on these findings and is as described below.

“A scaffold building frame that is provided with a plurality of lock brackets for attaching handrail frames or struts, and one of the lock brackets installed in pairs with the vertical columns constituting the building frame is movable. A building frame characterized in that the other is a fixed type. "
Here, the fixed lock metal fitting may have an angular displacement point in the middle of the metal fitting, or may have a step in the middle of the metal fitting.

  Typical examples of the building frame include a torii type building frame having an upper horizontal beam and two vertical columns, and an H frame having an intermediate horizontal beam and two vertical columns. There is no problem even if it is a building frame of other shapes.

  Further, the number of the lock metal fittings per one vertical column may be two or more, and may be an odd number. The number of lock brackets required for the vertical column of one building frame differs depending on the struts provided between two adjacent building frames and the shape and number of handrail frames. Cannot be decided. In general, since the building frame is used without distinguishing between the building side and the road side, it is usually preferable to install an even number of lock metal fittings per one vertical column. Particularly preferably, the number is 4 for the torii type building frame and 8 for the H frame.

  According to the present invention, by disposing the fixed lock metal fitting and the movable lock metal fitting in pairs with the vertical column of the building frame, the time and effort for releasing the lock metal fitting when removing the handrail frame is halved. In addition, since the operation of a dedicated disassembly jig is not required, it is possible to protect the safety of the operator.

  An example of a building frame according to the present invention will be described with reference to the drawings.

  FIG. 1 shows the arrangement of fixed lock fittings 23 and movable lock fittings 24 provided on a building-side vertical column 51 and a road-side vertical column 52 when an H frame is used as a building frame. (a) is a figure which shows the upper half of H frame, (b) is an enlarged view of the upper lock metal fitting 23, (c) is an enlarged view of the lower movable lock metal fitting 24. As for the lock fitting, an upper fixed lock fitting 23 and a lower movable lock fitting 24 are installed in pairs. Here, the upper fixed lock fitting 23 has a step 25 and the lower movable lock fitting 24 incorporates the claw fitting 13. Between this H frame and the adjacent H frame, a streak 8 is already attached to the vertical column 51 on the building side, and the H frame at this stage is self-supporting.

  In FIG. 2, when attaching one handrail frame 9 provided with four fixing brackets 20 with mounting holes 14 on the road side between this H frame and the adjacent H frame, After the two upper mounting holes 14 were fitted into the upper fixed lock fitting 23 provided in the vertical column of the H frame, the two lower mounting holes of the handrail frame were provided in the vertical column of the H frame. The entire handrail frame is fixed to two adjacent H frames by being fitted to the lower movable lock fitting 24 and operating the claw fitting 13 of the lower movable lock fitting.

  FIG. 3 is a schematic view of the vicinity of the lock fitting in a state where the upper fixed lock fitting 23 and the lower movable lock fitting 24 are fitted in the mounting holes 14 formed in the fixed fitting 20 of the handrail frame. (a) is the upper fixed lock fitting 23, and (b) is the lower movable lock fitting 24. Since the mounting hole 14 fitted to the upper fixed lock fitting 23 hits the step 25 of the fixed lock fitting, it cannot be removed even if a force is applied in the direction of the arrow. Since the mounting hole 14 fitted to the lower movable lock fitting hits the activated claw fitting 13, it does not come off even if a force is applied in the direction of the arrow. In this way, if the fixed lock metal fitting and the movable lock metal fitting are installed as a pair, the handrail frame can be fixed to the building frame without using both as a movable lock.

  On the contrary, when dismantling the scaffold, first, after releasing the claw fitting 13 of the lower movable lock fitting 24, if the entire handrail frame is pulled out to the operator side, the attachment opened on the fixing bracket 20 at the upper part of the handrail frame Since the hole 14 is disengaged from the upper fixed lock fitting 23 provided in the vertical column of the building frame, the entire handrail frame can be removed from the building frame. Depending on the shape of the fixed lock fitting, after the claw fitting 13 of the lower movable lock fitting 24 is released, the lower part of the handrail frame is pulled out to the operator side, and then the entire handrail frame is moved upward at a specific angle. In some cases, it may be necessary to lift the entire handrail frame upward at a specific angle after it has been lifted. Thus, the method of removing the handrail frame from the upper fixed lock metal fitting 23 depends on the shape of the fixed lock metal fitting.

  Next, an example of a method for removing the handrail frame from the upper fixed lock metal fitting will be described. FIG. 4 shows the state in which the claw fitting 13 of the lower movable lock fitting 24 is released and the mounting hole 14 opened from the lower movable lock fitting 24 to the lower fitting 20 of the handrail frame is removed. It is a schematic diagram of the vicinity of the lock fitting when the mounting hole 14 opened in the fixing fitting 20 at the upper part of the handrail frame is removed from the lock fitting. (a) is the upper fixed lock fitting 23, and (b) is the lower movable lock fitting 24. Here, the upper fixed lock fitting 23 has an angular displacement point in the middle thereof and a step 25 in the vicinity of the angular displacement point. The distal end portion 26 is bent upward by an angle θ and the outer diameter of the distal end portion 26 is smaller than the outer diameter of the root portion 27. In the case of the fixed lock fitting 23 having such a step 25 and the tip end portion 26, first, after releasing the claw fitting 13 of the lower movable lock fitting 24, the lower side of the handrail frame is pulled out to the operator side, and then the handrail. Slide the entire frame once upward, and then lift the upper part of the handrail frame upward at an angle θ so that the mounting hole 14 opened in the fixing bracket 20 on the upper part of the handrail frame passes through the tip of the upper lock metal fitting. Thus, the entire handrail frame can be removed from the building frame.

  The shape of the fixed lock fitting 23 is preferably as shown in FIG. 4, but is not particularly limited, and may be a shape other than that shown in FIG. 4. FIG. 5 (a) shows a straight type fixed lock metal fitting 23, FIG. 6 (a) shows a fixed type lock metal fitting 23 having an angular displacement point 28 in the middle of the metal fitting, and FIG. The metal fitting 23 and the fixed lock metal fitting 23 in which the outer diameter of the distal end portion 26 is larger than the root portion 27 are shown in FIG. These shapes vary depending on the type of building frame used for the scaffold, the shape or number of lines or handrail frames, the level of safety required for the lines or handrail frames, and the like.

  Preference is given to (1) having an angular displacement point in the middle of the fixed lock fitting (see FIG. 6 (a)) or (2) having a step in the middle of the fixed lock fitting (see FIG. 7). . Particularly preferred is (3) one having an angular displacement point in the middle of the fixed lock fitting and a step near the angular displacement point (see FIG. 4A).

  Hereinafter, each shape of the fixed lock fitting will be described in detail.

(1) About the angle displacement point in the middle of the fixed lock bracket Fig. 5 (a) shows the straight type fixed lock bracket, and Fig. 5 (b) shows the movable lock bracket. Since the distance between the upper fixed lock fitting 23 and the lower movable lock fitting 24 is constant and the claw fitting 13 of the movable lock fitting 24 is in operation, the mounting hole fitted in the movable lock fitting 24 14 is fixed. Therefore, even if the fixed lock metal fitting 23 is such a straight type, the mounting hole 14 fitted into the fixed lock metal fitting 23 moves horizontally over the fixed lock metal fitting 23 for a fixed distance. It will not come off the lock fitting. However, the upper portion of the handrail frame is easily shaken by the amount of the struts or the mounting hole 14 at the upper portion of the handrail frame horizontally moving on the fixed lock fitting 23. Therefore, in order to reduce the striation or the shaking of the upper part of the handrail frame, it is preferable that there is a displacement point of the angle θ in the middle of the fixed lock fitting. FIG. 6A shows a fixed lock fitting 23 having an angular displacement point 28, and FIG. 6B shows a movable lock fitting.

  The angle θ at this time is preferably 20 ° to 30 °. If the angle is too small, the same phenomenon as that of the straight type fixed lock metal fitting occurs. If it is too large, the movement distance increases when attaching or removing the streak or the handrail frame.

  In addition, it is preferable that the front-end | tip of a fixed lock metal fitting has faced the upper side. This is because if the front end of the fixed lock metal fitting is facing upward, the striation or the handrail frame will not fall out even if an impact is applied to the streak or the handrail frame.

(2) About having a step in the middle of the fixed lock metal fitting FIG. 7A is a side view of a fixed lock metal fitting 23 having a step 25 in the middle, and FIG. (C) is a B sectional view thereof. The distance between the upper fixed lock fitting 23 and the lower movable lock fitting (not shown) is constant. Therefore, if the fixed lock fitting 23 has such a step 25 in the middle and the lower movable lock fitting is activated, a mounting hole (not shown) fitted into the fixed lock fitting 23 is provided. Since it does not move to the left of the step 25, it does not come off the fixed lock fitting.

    If this step is too small, the fitted mounting hole (not shown) may get over the step, and conversely if the step is too large, the cross-sectional shape in the vicinity of the step is shown in FIG. As shown in b) and (c), the stepped portion 25 of the fixed lock fitting 23 has a smaller cross section than the root portion 27, and the strength of the fixed lock fitting may be reduced accordingly. Therefore, the size of the step is preferably set to an appropriate value in consideration of these possibilities.

(3) There is an angle displacement point in the middle of the fixed lock bracket and a step near the angle displacement point. If there is a displacement point of angle θ in the middle of the fixed lock bracket, The shaking of the upper part can be reduced. However, if there is only an angular displacement point in the middle of the fixed lock fitting, there is a possibility that the fixed lock fitting may be deformed when the struts or the upper part of the handrail frame is pulled with a strong force in the inner direction of the building frame. FIG. 9A shows a fixed lock fitting 23 having an angular displacement point 28 in the middle. (b) is a state in which the mounting hole 14 is fitted into the fixed lock fitting 23 of (a). At this time, if a strong force is applied in the direction of the arrow, the oblique side portion of the fixed lock fitting is pushed, so that elastic or plastic deformation occurs in the root portion 27 of the fixed lock fitting 23 or in the middle of the fixed lock fitting, The handrail frame may come off. (c) is a fixed lock fitting 23 having an angular displacement point on the way and further having a step 25. In this case, even if a strong force is applied in the direction of the arrow, the mounting hole 14 is caught by the step 25, and a tensile load is applied to the fixed lock metal fitting instead of a bending load. The possibility of a streak or handrail frame coming off is reduced.

  In addition, if the fixed lock bracket has a step in the middle, as described above, depending on the size of the step, the fitted mounting hole may get over the step. There is a possibility that strength as a metal fitting may be lowered. However, in such a fixed lock metal fitting 23 having an angular displacement point in the middle and further having a step 25, there is a possibility that the fitted mounting hole can get over the step without enlarging the step so much. It is small and can be saved without reducing the strength of the fixed lock fitting.

  Thus, by making the lock fitting a pair of a movable lock fitting and a fixed lock fitting, the operation of releasing the lock fitting is reduced. Further, it is possible to remove the streak or remove the handrail frame without using a dedicated dismantling jig.

  FIG. 10 shows a work diagram in the case of disassembling a scaffold assembled with an H frame having a height of 1.8 m provided with a movable lock fitting 23 and a fixed lock fitting 24. The worker 15 tries to remove the handrail frame 9 attached to the road side. After manually releasing the claw fitting of the lock fitting 24 installed at a height of 2.0 m, the handrail frame 9 is simply moved in the direction of the arrow, and the handrail frame 9 is installed at a height of 2.6 m. Can be removed easily. In this way, since a dedicated dismantling jig is not required, the operator can dismantle the scaffold assembled freely with only one hand or using both hands. Therefore, the possibility that the operator loses balance and falls from the scaffolding when removing the struts or the handrail frame is reduced.

  Finally, FIG. 11 illustrates the shape of the mounting holes provided in the fixing holes of the streaks or the fixing brackets of the handrail frame. (a) is circular, (b) is oval, and (c) is daruma. The shape of the mounting hole 14 is not particularly limited as long as it can be fitted into both the fixed lock metal fitting and the movable lock metal fitting, but the shape with R as shown in (a) to (c). preferable.

  As shown in FIG. 8, in the case of the fixed lock metal fitting 23 in which the outer diameter of the distal end portion 26 is larger than that of the root portion 27, the daruma shape of (c) may be adopted as the shape of the mounting hole. However, depending on the outer diameter of the movable lock fittings used as a pair, there is a possibility that the labor for checking the striation or the upper and lower sides of the handrail frame during assembly of the scaffold may increase. Therefore, as the shape of the mounting hole, the circular shape of (a) and the elliptical shape of (b) that have no vertical direction are particularly preferable.

  According to the present invention, the lock bracket when the handrail frame is removed from the scaffolding frame used in the construction site or the like by arranging the fixed lock bracket and the movable lock bracket in pairs with the vertical column of the building frame. The effort of releasing is reduced by half. In addition, since the operation of the dedicated dismantling jig is not required, there is no danger of the operator falling and the safety of the operator can be protected.

The arrangement | positioning of the lock metal fitting provided in the vertical column in the case of using H frame as a building frame is shown. (a) is an overall view, (b) is a fixed lock fitting, and (c) is a movable lock fitting. A state in which one handrail frame is fixed to two adjacent H frames is shown. It is a schematic diagram of the vicinity of the lock fitting in a state in which the upper fixed lock fitting and the lower movable lock fitting are fitted in the attachment holes of the handrail frame. (a) is a fixed lock metal fitting, and (b) is a movable lock metal fitting. It is a schematic diagram of the vicinity of the lock fitting when the upper attachment hole 14 of the handrail frame is removed from the upper fixed lock fitting with the lower attachment hole 14 of the handrail frame removed from the lower movable lock fitting. (a) is a fixed lock metal fitting, and (b) is a movable lock metal fitting. (a) shows a straight type fixed lock fitting, and (b) shows a movable lock fitting. (a) shows a fixed lock metal fitting having an angular displacement point, and (b) shows a movable lock metal fitting. (a) is a side view of the fixed lock metal fitting which has a level | step difference in the middle, (b) is the A sectional drawing, (c) is the B sectional drawing. The fixed type | mold metal fitting which made the outer diameter of the front-end | tip part larger than the root part is shown. (a) is a front view of a fixed lock metal fitting, and (b) is a side view. (a) is a fixed lock metal fitting with an angular displacement point in the middle. (b) is a state in which a mounting hole is fitted into the fixed lock fitting of (a). (c) is a fixed type lock fitting having an angular displacement point on the way and further having a step. The work figure in the case of disassembling the scaffold assembled using the H frame in which the movable lock metal fitting and the fixed lock metal fitting are provided is shown. It is an illustration of the shape of the attachment hole provided in the fixing hole of a staggered attachment hole or a handrail frame. (a) is circular, (b) is oval, and (c) is daruma. An example of forming a frame scaffold using a torii type building frame is shown. (a) is a front view, (b) is a right side view. An example of forming a frame scaffold using the H frame will be shown. (a) is a front view, (b) is a rear view, and (c) is a right side view. The example of the nail | claw metal fitting integrated in the lock metal fitting is shown. (a) is a spring type, and (b) is a gravity drop type. The state where the spring-type claw metal fittings incorporated in the lock metal fittings operate is shown. (a) is a side view, (b) is a front view. An example in which various struts and handrail frames are attached between adjacent building frames is shown. (a) is an example in which two struts are attached in a cross shape. (b) is an example in which one triangular strut and handrail frame is attached. (c) is an example in which only one strut is attached. (d) is an example in which one handrail frame is attached. The work figure in the case of assembling a scaffold using H frame is shown. (a) is an overall view, and (b) is an enlarged view of the vicinity of the worker's head. The work figure in the case of dismantling the scaffold assembled using the H frame is shown. (a) is an enlarged view of the vicinity of the operator's head. (b) shows the work of inserting the dedicated dismantling metal fitting into the lock metal fitting, and (c) the work of releasing the claw metal fitting by rotating the special dismantling metal fitting.

Explanation of symbols

6 Upper horizontal beam 7 Middle horizontal beam 8 Stitch 9 Handrail frame 10 Lower horizontal beam 11 Locking bracket for building-side vertical column 12 Locking bracket for road-side vertical column 13 Claw bracket 14 Mounting hole 15 Worker 16 Dedicated disassembly bracket 17 Spring DESCRIPTION OF SYMBOLS 20 Fixing metal fixture 21 Lock metal fitting installed in height 2.0m 22 Lock metal fitting installed in height 2.6m 23 Fixed lock metal fitting 24 Movable lock metal fitting 25 Step 26 Tip part 27 Base part 28 Angular displacement point 31 1 Torii type building frame in the second stage 32 Torii type building frame in the second stage 40 Lowermost building frame 41 H frame in the first stage 42 H frame in the second stage 51 Vertical column on the building side 52 Vertical column on the road side 81 Building Side railing and handrail frame 82 Handrail frame on road side 90 Base plate 91 First stage scaffolding plate 92 Second stage scaffolding plate 93 Third stage scaffolding plate

Claims (7)

  A scaffolding frame that is provided with a plurality of lock brackets for attaching handrail frames or struts, and one of the lock brackets installed in pairs with the vertical columns constituting the building frame is movable A building frame characterized in that the other is a fixed type.   The building frame according to claim 1, wherein the fixed lock metal fitting has an angular displacement point in the middle of the metal fitting.   The building frame according to claim 1 or 2, wherein the fixed lock metal fitting has a step in the middle of the metal fitting.   The building frame according to any one of claims 1 to 3, wherein the building frame has a torii-shaped shape having an upper horizontal rail and two vertical columns.   The building frame according to claim 4, wherein an even number of lock fittings are installed per vertical column.   The building frame according to any one of claims 1 to 3, wherein the building frame has an H-shape having an intermediate horizontal rail and two vertical columns. The building frame according to claim 6, wherein an even number of lock fittings are installed per vertical column.

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