Method and device for constructing suspended scaffolding

Abstract

To provide a suspended scaffold construction method capable of reducing the number of cables for suspending a scaffold, and a device for construction.SOLUTION: In a suspended scaffold construction method, assembly and integration is made by performing an assembly method including: an adjacent step of making girder-side frames (3) of both scaffold boards adjacent to each other in a state where a preceding scaffold board and a succeeding scaffold board are suspended by a cable (9) with respect to an array direction; a connection step of connecting the scaffold boards by joint means (6); and a coupling step of integrally coupling the adjacent girder-side frames (3) using a coupling tool (13). By repeating the assembly method, a large number of scaffold boards are arrayed. A cable removal step is performed, the step including considering the plurality of scaffold boards connected and integrated by the assembly method as one unit (U), and, while making at least one scaffold board in the unit suspended by the cable (9), detaching and removing the cable (9) from the other at least one scaffold board.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a method for constructing a suspended scaffold and to an apparatus for carrying out said method. [Background technology]

[0002] 2. Description of the Related Art Conventionally, when constructing or repairing elevated structures such as expressways and bridges, or other existing structures at high altitudes, a suspended scaffold is constructed to extend along the existing structure.

[0003] A suspended scaffolding board (hereinafter simply referred to as a "scaffolding board") for constructing a suspended scaffolding is generally configured as shown in FIGS. 1 to 3.

[0004] The scaffolding board 1 is configured to support a rectangular floor material 2 using a first girder side frame 3A and a second girder side frame 3B (sometimes simply referred to as "girder side frames 3" when the two are not distinguished) made of square pipe materials or the like arranged parallel to one another at a distance from each other, and a first girder side frame 4A and a second girder side frame 4B (sometimes simply referred to as "gable side frames 4" when the two are not distinguished) made of circular pipe materials are erected on both ends 3a, 3b of a pair of girder side frames 3A, 3B that protrude from both side edges of the floor material 2.

[0005] Furthermore, a center frame 5 made of a circular pipe material is arranged below the center of the width of the floor material 2, and both ends 5a, 5a are fixed to the end frame 4 by welding or the like to connect them.

[0006] When multiple scaffolding boards are lined up in sequence, the leading scaffolding board 1 and the trailing scaffolding board 1 are arranged so that the sides of the girder side frames 3A, 3B are adjacent to each other and connected by joint means 6 provided on the end frames 4A, 4B. Note that the joint means 6 may also be provided on the girder side frames 3A, 3B, and in short, the scaffolding boards 1, 1 adjacent to each other in the line-up direction are configured to be connected to each other.

[0007] In the example shown in the figure, the end frame 4 is configured so that both ends do not protrude from the outer surfaces of the first girder side frame 3A and the second girder side frame 3B, and one of the ends is opened onto the outer surface of the first girder side frame 3A to form a socket 6a, and a member inserted into the other end is made to protrude outward beyond the outer surface of the second girder side frame 3B to form a plug 6b, and a joint means 6 is formed by inserting the plug 6b into the socket 6a between the end frames 4, 4 of adjacent scaffolding boards 1, 1 to connect them.

[0008] At this time, the socket 6a and the plug 6b which are fitted together are held in place by inserting the connecting pin 7 through the socket 6a and the plug 6b.

[0009] However, as typified by expressways, the extension direction of an elevated structure is not necessarily limited to a straight line, but also includes a curved line. Therefore, the suspended scaffolding must also be constructed in a direction corresponding to this. For this reason, the joint means 6 is configured so that the socket 6a can be slidably inserted into the plug 6b. The insertion hole of the plug 6b into which the connecting pin 7 is inserted is formed by a long hole 8, and the plug 6b and the socket 6a are allowed to slide within the range of the long hole 8, so that the distance between adjacent scaffolding boards 1, 1 can be adjusted.

[0010] In the illustrated example, the connecting pin 7 is tethered to a rope such as a chain to prevent loss, and the rope is fastened to a bracket 7a fixed to the ends 3a, 3a of the first girder side frame 3A.

[0011] When constructing a suspended scaffold, the scaffold boards 1 are lined up along an existing structure by alternately connecting the sockets 6a and plugs 6b, and are suspended from the underside of the existing structure by means of ropes 9 such as chains. To enable such suspension by means of ropes 9 such as chains, the floor material 2 has window holes 10 at predetermined intervals facing the center frame 5, and the frame 5 is provided with annular suspension fittings 11 facing each window hole 10. Therefore, by connecting the ropes 9 to the suspension fittings 11, the frame 5 is suspended via the fittings 11.

[0012] Although not shown, a rope 9 such as a chain is hung by folding back one rope at the bottom end to form two parallel ropes, and the folded back portion is inserted into the hanging metal fitting 11 to suspend the metal fitting 11. Therefore, the rope 9 is also used to suspend the end 5a of the center frame 5 by winding the folded back portion around the end 5a, as shown in the figure. [Prior art documents] [Patent documents]

[0013] [Patent Document 1] Patent No. 6366472 [Patent Document 2] Patent No. 6426917 [Patent Document 3] Patent No. 6663726 Summary of the Invention [Problem to be solved by the invention]

[0014] The numerous scaffolding boards lined up to construct the suspended scaffolding are all suspended by a plurality of ropes 9.

[0015] As described above, the adjacent leading and trailing scaffolding boards are connected by the joint means 6, but the joint means 6 is for connecting the two scaffolding boards so that the distance between them can be adjusted, and does not form a rigid structure that supports each other's load. Therefore, each scaffolding board needs to be suspended by multiple ropes 9, and if the ropes are removed from a scaffolding board, the scaffolding board may fall, which is extremely dangerous.

[0016] For this reason, a large number of cables 9 will be stretched out in a forest-like pattern on the floor surface of the constructed suspended scaffolding.

[0017] By the way, the suspended scaffolding is configured such that the floor surface constructed by the previously installed scaffolding boards is expanded by sequentially transporting additional scaffolding boards to a predetermined position and adding subsequent scaffolding boards.

[0018] However, in a situation where a large number of cables are strung across the structure as described above, when transporting long, large scaffolding planks, it is necessary to avoid interference with the cables, which makes the transportation work complicated and requires a lot of effort and time.

[0019] Another problem is that the large number of ropes hinder smooth movement of workers not only when transporting scaffolding boards, but also when workers move around on the floor.

[0020] Therefore, the present invention relates to the ropes that are stretched out in a forest-like manner on the floor surface of a suspended scaffolding, and has discovered that it is possible to configure the ropes so that they can be detached and removed from the scaffolding boards that are lined up in a straight line at least in the suspended scaffolding structure.As a result, the objective of the present invention is to provide a method and apparatus for constructing a suspended scaffolding that solves the above-mentioned problem by reducing the number of ropes. [Means for solving the problem]

[0021] Therefore, the construction method of the suspended scaffold of the present invention is configured as a means to construct a suspended scaffold by suspending a scaffold board from an existing structure with a rope and lining up a number of scaffold boards in sequence in the extension direction of the existing structure, and the scaffold board (1) is provided with a pair of girder side frames (3A) and (3B) supporting a floor plate (2), end side frames (4A) and (4B) erected on the girder side frames, and joint means (6) for connecting adjacent scaffold boards in the lining direction to each other, and the leading scaffold board and the trailing scaffold board are suspended by ropes (9) in the lining direction. In this embodiment, the scaffolding boards are assembled and integrated by carrying out an assembly method comprising an adjoining step of arranging the girder side frames (3) of both scaffolding boards next to each other with the joint means (6), a connecting step of connecting the two scaffolding boards to each other with the joint means (6), and a connecting step of connecting the adjacent girder side frames (3) of both scaffolding boards to each other with the fasteners (13). The assembly method is then repeatedly carried out between the leading scaffolding board and the trailing scaffolding board, thereby sequentially arranging a large number of scaffolding boards in a row. The multiple scaffolding boards connected and integrated by the assembly method are treated as a set of units (U), Build units (U1, U2, Un) one after another, and for each unit, At least one of the scaffolding boards constituting the unit is suspended by a rope (9). The state in which the At least one other scaffold plank teeth Remove the cable (9) and remove it. Will be With a cable removal process The scaffolding planks that are not suspended by the ropes (9) are supported by the scaffolding planks that are suspended by the ropes (9). It is at the point where it becomes.

[0022] In addition, the device for constructing a suspended scaffold of the present invention is 1. The means for constructing the scaffolding is as follows: in the above-mentioned suspended scaffolding, the scaffolding board has openings (12) between both side edges of the floor board (2) and the gable side frame (4), and both ends (3a) and (3b) of the girder side frame (3) face the openings; The fastener (13) is provided with a generally U-shaped metal fitting (17) with upper and lower wings (15 and 16) extending horizontally from the upper and lower ends of the vertical wall portion (14), a latch-type locking member (19) that is vertically movable on one of the upper and lower wings and whose tip is inserted into a slot (18) formed on the other of the upper and lower wings when moved downward, and a fixing means (20) for fixing the locking member so that it cannot move with the tip of the locking member inserted into the slot. The fastener (13) is configured to attach the vertical wall portion (14) and the locking member (19) to both sides of the entire circumference of both ends (3a, 3a) (3b, 3b) of the girder side frame overlapped adjacently between the leading scaffolding board and the trailing scaffolding board, and to attach the upper and lower wings (15) (16) to the upper and lower parts. It is at the point.

[0023] Furthermore, the second means of the device for constructing a suspended scaffold of the present invention is that, in the suspended scaffold, the scaffold board has an opening (12) formed between both side edges of the floor board (2) and the gable side frame (4), and both ends (3a) and (3b) of the girder side frame (3) face the opening, and the connecting device (13) is composed of a substantially U-shaped metal fitting (24) having a pair of support parts (22) and (23) fixed to it crossing both ends of the side wall part (21), and a connecting device (13) that is pivotally connected to the end of one of the support parts (22) so as to be freely rotatable and has a tip part connected to the other support part. The scaffolding system is provided with a locking member (25) which is detachably engaged with the end of the column portion (23), and a fixing means (26) which fixes the locking member so as not to be rotatable while the tip of the locking member is engaged with the end of the other support column portion. The scaffolding system is configured such that the pair of support columns (22) (23) are attached to both sides of the entire circumference of both ends (3a, 3a) (3b, 3b) of the girder side frame which are overlapped adjacently between the leading scaffolding board and the trailing scaffolding board, and the side wall portion (21) and the locking member (25) are attached to the upper and lower parts. . Effect of the Invention

[0025] According to the present invention, it is possible to reduce the number of cables in the entire suspended scaffolding structure, thereby improving the environment in which a large number of cables were stretched across the floor surface in a forested manner as in the conventional technology. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a perspective view showing a scaffolding board in a conventional suspended scaffolding. [Diagram 2] FIG. 1 is a perspective view showing a conventional method for arranging scaffolding boards. [Diagram 3] FIG. 1 is a perspective view showing a portion of a suspended scaffold constructed by arranging conventional scaffolding boards in a row. [Figure 4] FIG. 1 is a perspective view showing an embodiment of the present invention, illustrating a unit consisting of two scaffolding boards that are connected together. [Diagram 5] 1 shows a fastener according to a first embodiment, in which (A) is a perspective view of the front side with the locking member open, (B) is a perspective view of the rear side with the locking member open, (C) is a perspective view of the front side with the locking member closed, and (D) is a perspective view of the rear side with the locking member closed. [Figure 6] 1 shows how to use the fastener in the first embodiment, where (A) is an oblique view of the fastener facing the ends of the girder side frames of adjacent scaffolding boards that are overlapped on each other, (B) is an oblique view of the state in which the vertical wall portion of the fastener is attached to the side of the end of one of the girder side frames and the upper and lower wing portions of the fastener are attached to the upper and lower surfaces of the ends of both girder side frames, (C) is an oblique view of the state in which the ends of both girder side frames are embraced and fixed from all around by closing the locking member of the fastener, and (D) is a side view showing the state in which the ends of the girder side frames are embraced and fixed by the fastener. [Figure 7] Regarding the fastener of the first embodiment, the following figures show the fastener used to integrally fasten the opposite ends of the girder side frame, where (A) is an oblique view of the rear side with the locking member open, and (B) is an oblique view of the state in which the end of the girder side frame is embraced and fixed from all around by closing the locking member. [Figure 8]1 shows a fastener according to a second embodiment and a method for using the fastener, where (A) is an oblique view of the fastener facing the end of the girder side frame of adjacent scaffolding boards that are overlapped with each other, (B) is an oblique view of the state in which a side wall portion is attached to the underside of the end of the girder side frame and a pair of support portions are attached to both side surfaces of the end of the girder side frame, (C) is an oblique view of the state in which the ends of both girder side frames are embraced and fixed from all around by closing the locking member, and (D) is a side view showing the embraced and fixed state. [Figure 9] FIG. 1 shows one cycle of an assembly method for assembling and integrating two scaffolding boards in accordance with one embodiment of the present invention, where (A) is an oblique view showing the leading scaffolding board suspended by a rope, (B) is an oblique view showing the adjoining process in which the trailing scaffolding boards are brought next to each other, (C) is an oblique view showing the connecting process in which the boards are connected using a joint means, and (D) is an oblique view showing the state in which a unit is formed by performing the connecting process in which the boards are joined together using a fastener, and the rope removal process in which the rope is removed from the trailing scaffolding board. [Figure 10] Regarding a method for constructing a suspended scaffold according to one embodiment of the present invention, the following method is shown for lining up subsequent scaffolding boards by repeatedly carrying out an assembly method for a unit consisting of two scaffolding boards as shown in Figure 8, where (A) is an oblique view showing the adjoining and connecting process of the subsequent scaffolding boards, (B) is an oblique view showing the joining process of the subsequent scaffolding boards, and (C) is an oblique view showing the state in which a subsequent scaffolding board is adjacent to the subsequent scaffolding board that is joined together. [Figure 11] This is an oblique view showing the state in which a rope removal process has been carried out for each unit, with two scaffolding boards forming one unit, for a suspended scaffolding constructed by a method according to one embodiment of the present invention. [Figure 12] This is an oblique view showing the state in which a rope removal process has been carried out for each unit, with three scaffolding boards forming one unit, for a suspended scaffolding constructed by a method according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0028] (How to build a suspended scaffold) Figures 4 to 10 show one embodiment of the method for constructing a suspended scaffold according to the present invention. In this case, the scaffold board 1 is the same as the scaffold board described above based on Figures 1 to 3, and the method for constructing a suspended scaffold is carried out by using such a scaffold board 1, and a large number of scaffold boards 1 are successively arranged in a row in the extension direction of an existing structure while being suspended by cables 9, thereby constructing a suspended scaffold.

[0029] The method of constructing a suspended scaffolding of the present invention comprises an assembly method in which the leading scaffolding plank 1a and the trailing scaffolding plank 1b in the row installation direction are assembled and integrated while suspended by ropes 9, and a rope removal process in which the ropes are detached and removed from a specified scaffolding plank, and the rope removal process is carried out while the assembly method is being carried out.

[0030] The assembly method comprises an adjoining process in which the girder side frames 3B, 3A of both scaffolding boards 1a, 1b are aligned side by side while the leading scaffolding board 1a and the trailing scaffolding board 1b are each suspended by a rope 9; a connecting process in which the opposing gable side frames 4 of both scaffolding boards 1a, 1b are connected by joint means 6; and a joining process in which the adjacent girder side frames 3B, 3A of both scaffolding boards 1a, 1b are joined together by fasteners 13, thereby forming a unit U consisting of two scaffolding boards 1a, 1b as a set.

[0031] Next, the scaffolding board 1b of the unit U is set as the leading side, and the next trailing scaffolding board 1c is connected together using the same assembly method as above, and then this scaffolding board 1c is set as the leading side, and the next trailing scaffolding board 1d is connected together using the same assembly method as above.By repeatedly performing the assembly method in this manner, a large number of scaffolding boards 1a to 1n are lined up in sequence, thereby constructing a suspended scaffolding.

[0032] In this case, in the case of the embodiment shown in Figures 4 to 10, a first unit U1 is constructed as a set of two scaffolding boards 1a, 1b connected together by the assembly method, and following this unit U1, units U2, U3 to Un, each of which is a set of two scaffolding boards, are constructed in sequence by scaffolding boards 1c to 1n which are added by continuously connecting and integrating them by the assembly method, while a cable removal process is carried out in which the cable 9 that was suspending a specified scaffolding board 1 is detached and removed.

[0033] That is, following the first unit U1, scaffolding boards are successively lined up to form a second unit U2 consisting of the subsequent scaffolding boards 1c and 1d as a set, and then a third unit U3 consisting of the subsequent scaffolding boards 1e and 1f as a set is constructed by a method of constructing a suspended scaffold, and during this process, a rope removal process is carried out in which one of the scaffolding boards 1, 1 in the previously constructed unit U is left suspended by a rope 9, and the rope 9 is detached and removed from the other scaffolding board.

[0034] (Parts joined together by fasteners) 1 and 4, the scaffolding board 1 has openings 12 formed between both side edges of the floor board 2 and the gable side frame 4, and both ends 3a, 3b of the girder side frames 3A, 3B face the openings 12. Since the end 5a of the center frame 5 is disposed in the center of the opening 12, the opening 12 is composed of openings 12a, 12b divided on both sides of the end 5a.

[0035] As shown in Fig. 4, when the leading scaffolding board 1a and the trailing scaffolding board 1b, each suspended by a rope 9, are arranged next to each other in the row installation direction, the girder side frames 3B, 3A of both scaffolding boards 1a, 1b are overlapped with each other. Then, of both ends of the girder side frames 3B, 3A, one end 3a, 3a and the other end 3b, 3b are overlapped with each other, and this portion faces the openings 12a, 12b, so it is possible to embrace and fix from the entire circumference by the fasteners 13.

[0036] (First embodiment of fastener) FIG. 5 shows a first embodiment of a coupling 13 . The fastener 13 comprises a metal fitting 17 formed into a roughly U-shape with excellent rigidity by extending upper wing portions 15 and lower wing portions 16 horizontally from the upper and lower ends of the vertical wall portion 14, a latch-type locking member 19 that is freely movable in the vertical direction on one of the upper and lower wing portions (upper wing portion 15 in the illustrated example) and has a tip portion that, when moved downward, is inserted into a slot 18 formed in the other of the upper and lower wing portions (lower wing portion 16 in the illustrated example), and a fixing means 20 that fixes the locking member 19 so that it cannot move with the tip portion of the locking member 19 inserted in the slot 18.

[0037] In the illustrated embodiment, the locking member 19 has a slit 19a extending in the vertical direction and a bent head 19b at its upper end. A headed bolt 20a constituting the fixing means 20 is inserted through the slit 19a and screwed into the upper wing portion 15.

[0038] Therefore, as shown in Figures 5(A) and (B), when an operator pinches head 19b with his or her fingertips and pulls up locking member 19, and then tightens bolt 20a, locking member 19 is held in a standby position, releasing the opening of the space between upper and lower wing sections 15, 16.

[0039] From this state, as shown in Figures 5(C) and (D), when the worker loosens bolt 20a to lower locking member 19 and then tightens bolt 20a with the tip of locking member 19 inserted into slot 18, locking member 19 is held in the locked position and closes the opening in the space between upper and lower wing sections 15, 16.

[0040] In this case, it is preferable to form a tapered surface between the tip of the locking member 19 and the slot 18, and when the locking member 19 is driven into the slot 18 by striking the head 19b with a hammer or the like, the locking member 19 acts as a wedge, thereby clamping and fastening both side surfaces of the ends 3a, 3b of the adjacent girder side frames 3A, 3B between the vertical wall portion 14 and the locking member 19.

[0041] In the illustrated embodiment, the opening of the space between the upper and lower wings 15, 16 is opened and closed by moving the locking member 19 up and down, but the opening of the space may be opened and closed by rotating the locking member 19. For example, if the locking member 19 is pivotally supported rotatably around the axis of the bolt 20a and the slot 18 is formed in the shape of a notch from the side edge of the lower wing 16, the opening of the space can be opened by rotating the locking member 19 upward, and the opening of the space can be closed by rotating the locking member 19 downward and entering the slot 18.

[0042] FIG. 6 shows a method for implementing a joining step in which one end portions 3a, 3b of adjacent girder side frames 3A, 3B are joined together by using the joining tool 13 according to the first embodiment.

[0043] As shown in Figures 6(A) and (B), with the locking member 19 in the standby position, the fastener 13 is brought into contact with the ends 3a, 3b from the inside of one of the adjacent openings 12a, 12b, and the vertical wall portion 14 and the upper and lower wing portions 15, 16 of the metal fitting 17 are attached to one side surface and the upper and lower surfaces of the ends 3a, 3b.

[0044] From this state, as shown in Figures 6(C) and (D), when the locking member 19 is put in the locked position and the bolt 20a is tightly tightened, the locking member 19 is pressed against the other side surface of the end portions 3a, 3b, and preferably, both side surfaces of the end portions 3a, 3b are clamped and fastened by the vertical wall portion 14 and the locking member 19.

[0045] As a result, the ends 3a, 3b are fixed in a state in which the entire periphery is embraced by the fastener 13.

[0046] Figures 5 and 6 show a fastener 13L for integrally connecting the left-hand ends 3a, 3b of adjacent girder side frames 3A, 3B in the figure, and the fastener 13L is provided at a position where the vertical wall portion 14 is offset toward the left from the center of the metal fitting 17 so as not to interfere with the bracket 7a fixed to the end 3a.

[0047] 7 shows a fastener 13R for integrally fastening the end portions 3a, 3b on the right side in the drawing of adjacent girder side frames 3A, 3B. The basic structure is the same as that of the fastener 13L, but the vertical wall portion 14 of the fastener 13R is provided at a position offset from the center of the metal fitting 17 toward the right so as not to interfere with the bracket 7a fixed to the end portion 3a.

[0048] In this way, the ends 3a, 3b on the left side in the figure and the ends 3a, 3b on the right side in the figure of the adjacent girder side frames 3A, 3B are embraced and fixed all around by the fasteners 13L, 13R, respectively, and are joined together. As a result, the adjacent scaffolding boards 1a, 1b are joined so as to support each other's loads by the fasteners 13 that integrate the girder side frames 3A, 3B, without applying their respective loads to the joint means 6.

[0049] (Second embodiment of fastener) FIG. 8 shows a first embodiment of a coupling 13 . As shown in Figures 8(A) and (D), the fastener 13 is composed of a substantially U-shaped metal fitting 24 having a pair of support posts 22, 23 fixed across both ends of a side wall portion 21 made of a metal plate, and a locking member 25 made of a metal plate pivotally connected to the end of one of the support posts 22 so as to be freely rotatable.

[0050] In the illustrated embodiment, the locking member 25 is fitted onto a screw shaft portion 22a formed on the end of one of the support portions 22 and is held by a nut 22b screwed onto the screw shaft portion 22a. By rotating around the axis of the screw shaft portion 22a, a locking portion 25a consisting of a hook portion formed at the tip of the locking member 25 is engaged with a screw shaft portion 23a formed on the end of the other support portion 23 in a freely engageable and detachable manner.

[0051] A nut 23b is screwed onto the threaded shaft portion 23a of the other support portion 23, and the nut 23b constitutes a fixing means 26 that fixes the locking portion 25a locked to the threaded shaft portion 23a by tightening.

[0052] Therefore, when the locking member 25 is rotated in a direction away from the other support portion 23, the opening of the space between the support portions 22, 23 is opened. In this state, the locking member 25 can be held in the standby position by tightening the nut 22b of one of the support portions 22.

[0053] When the locking member 25 is rotated to engage the engaging portion 25a with the other support portion 23, the opening of the space between the support portions 22, 23 is closed. When the nut 23b is fastened in this state, the engaging portion 25a is fixed, and the locking member 25 can be held in a locked position where it cannot be rotated.

[0054] 8(A) to (D) show a method for implementing a joining step in which one end portion 3a, 3b of adjacent girder side frames 3A, 3B is joined together by using a fastener 13 according to the second embodiment.

[0055] As shown in Figures 8(A) and (B), with the locking member 25 in the standby position, the fastener 13 is brought to face the ends 3a, 3b from below, and the support portions 22, 23 are inserted into the adjacent openings 12a, 12b, whereby the side wall portion 21 is pressed against the undersides of the ends 3a, 3b, and the support portions 22, 23 are pressed against both side surfaces of the ends 3a, 3b.

[0056] From this state, as shown in Figures 8(C) and (D), when the locking member 25 is brought into the locked position and fixed by the fixing means 26, the locking member 25 is spliced ​​across the upper surfaces of the ends 3a and 3b.

[0057] At this time, it is preferable to fasten nuts 22b, 23b with a tool such as a wrench to press locking member 25 against the upper surfaces of end portions 3a, 3b, so that locking member 25 and lateral wall portion 21 clamp and fasten the upper and lower surfaces of end portions 3a, 3b.

[0058] As a result, the ends 3a, 3b are fixed in a state in which their entire peripheries are embraced by the fastener 13. In the illustrated example, the side wall portion 21 of the fastener 13 is affixed to the lower surfaces of the ends 3a, 3b, but the fastener 13 may be turned upside down and attached so that the side wall portion 21 is affixed to the upper surfaces of the ends 3a, 3b.

[0059] (One embodiment of a method for constructing a suspended scaffold) 9 to 11 show one embodiment of the method for constructing a suspended scaffold according to the present invention, and Fig. 9(A) to (D) show one cycle of the assembly method for assembling and integrating a leading scaffold board 1a and a trailing scaffold board 1b in the row installation direction. In this embodiment, a unit U is constructed by combining two joined and integrated scaffold boards 1a and 1b, and a cable removal process is carried out for removing and removing the cable 9 from one scaffold board for each unit.

[0060] As shown in FIG. 9(A), the leading scaffolding board 1a is suspended by a rope 9a, and as shown in FIG. 9(B), the trailing scaffolding board 1b is suspended by a rope 9b and placed next to each other (adjacent step), and the girder side frames 3, 3 are placed in parallel and adjacent to each other, and the end side frames 4, 4 are placed facing each other, and as shown in FIG. 9(C), they are connected by the joint means 6 (connecting step). That is, as described above, the plug 6b is inserted into the socket 6a, and although not shown, the connecting pin 7 is inserted and penetrated. Then, as shown in FIG. 9(D), the connectors 13 are attached to both ends 3a, 3b of the adjacent girder side frames 3A, 3B to connect them together (connecting step). This completes one cycle of the assembly method, and the adjacent scaffolding boards 1a, 1b are connected together to form a unit U.

[0061] Following the trailing scaffolding plank 1b in the unit U, as shown in Figure 10, the next trailing scaffolding plank 1c is connected and integrated by carrying out the assembly method while it is suspended by ropes 9c, and then the next next scaffolding plank 1d is connected and integrated by carrying out the assembly method while it is suspended by ropes 9d, and by repeatedly carrying out this process, a suspended scaffolding of a predetermined length is constructed.

[0062] At this time, as shown in FIG. 9(D), the scaffolding board 1a of the unit U is suspended by the cable 9c, and the scaffolding board 1b of the trailing side is integrally connected to it. Therefore, even if the cable 9b that suspended the scaffolding board 1b of the trailing side is removed, the scaffolding board 1b is suitably supported by the scaffolding board 1a of the leading side and will not fall. Therefore, in the illustrated embodiment, the scaffolding boards of the adjacent units U, U are also mutually coupled and integrated with the connector 13, but it is also possible to simply connect the units with the joint means 6 without providing the connector 13 between them. In other words, in the example shown in FIG. 10, the scaffolding board 1c of the next order is suspended by the cable 9c with respect to the trailing scaffolding board 1b of the unit formed in advance, so it is not necessary to couple and integrate it with the connector 13.

[0063] Incidentally, when the unit U is formed, a cable removing process is carried out to remove and remove the cable 9b that has been suspending the scaffolding plank 1b on the subsequent side. However, the timing of carrying out the cable removing process does not necessarily have to be immediately after the formation of the unit U, and it may be carried out at any time after the formation of the unit U. For example, at the stage shown in FIG. 10(B), that is, after the precedingly formed unit U is assembled by carrying out the assembly method, the cable removing process may be carried out to remove and remove the cable 9b that has been suspending one scaffolding plank 1b in the unit U. In this case, the scaffolding plank 1b from which the cable has been removed is connected and integrated with the scaffolding planks 1a and 1c that are adjacent to each other on both sides in the row installation direction and suspended by the cable 9a and 9c, respectively, via the connector 13, so that the worker can feel at ease.

[0064] Incidentally, in one cycle of the assembly method for forming the unit U shown in Fig. 9(A) to (D), the rope 9b for suspending the trailing scaffolding board 1b during the assembly work is removed and removed after the unit U is formed, so it is not necessary to hang it from directly above the scaffolding board 1b. In other words, the rope is hung by selecting a suspension point of a U-shaped anchor or the like arranged in a row on an existing structure, and in this case, the rope for supporting the load of the scaffolding board needs to be hung from a suspension point located directly above the scaffolding board, whereas the rope 9b of the scaffolding board 1b does not need to be hung from a suspension point located near the suspension point of the rope 9a for suspending the leading scaffolding board 1a, which has the advantage that the worker can perform the rope 9b hanging work without leaning over the leading scaffolding board 1a.

[0065] In this way, as shown in Figure 11, in the constructed suspended scaffolding, cables are removed from one scaffolding plank in each of the constructed units U1, U2, and U3, and the number of cables in the entire suspended scaffolding structure is reduced to half compared to the prior art.

[0066] (Another embodiment of a method for constructing a suspended scaffold) Figure 12 shows another embodiment of the method for constructing a suspended scaffolding according to the present invention, in which scaffolding boards 1a, 1b, 1c, 1d...1n are connected together in sequence in the row installation direction by carrying out the assembly method, which is similar to the above-mentioned embodiment, but in this embodiment, a unit U is formed consisting of a set of three connected and integrated scaffolding boards, and a cable removal process is carried out to detach and remove the cables 9 from two scaffolding boards for each unit.

[0067] Of the units U1, U2, etc., which are arranged in sequence in the row installation direction, unit U1 has had the cables removed from the two scaffolding boards 1b, 1c. The scaffolding boards 1b, 1c from which the cables have been removed are connected in a continuous state to the scaffolding board 1a suspended by the adjacent cables 9a on the leading side and the scaffolding board 1d suspended by the adjacent cables 9d on the trailing side via connectors 13, so that the load is well supported and will not fall. The same is true for the next unit U2.

[0068] In this way, after the construction of the suspended scaffolding, the cables are removed from each of the two scaffolding boards in the constructed units U1, U2, etc., and the number of cables in the entire suspended scaffolding structure is reduced to one-third compared to the prior art. [Explanation of symbols]

[0069] 1 Scaffolding board 2. Flooring 3 Digit Side Frame 3A 1st digit side frame 3B Second girder side frame 3a, 3b ends 4 Gable side frame 4A First gable side frame 4B Second gable side frame 5 Center Frame 5a end 6 Joint means 6a Socket 6b Plug 7 Connecting pin 7a Bracket 8 long hole 9 cables 10 Window Hole 11 Hanging bracket 12a, 12b opening 13 Fasteners 14 Vertical wall section 15 Upper wing 16 Lower wing 17 Metal fittings 18 Slots 19 Locking member 19a Slit 19b Head 20 Fixing means 20a bolt 21 Side wall 22 One of the support columns 22a Screw shaft 22b Nut 23 The other support 23a Screw shaft 23b Nut 24 Metal fittings 25 Locking member 25a Locking part 26 Fixing means

Claims

1. A suspended scaffold is constructed by suspending scaffolding boards from an existing structure with ropes and lining up multiple scaffolding boards in the extension direction of the existing structure. The scaffolding board (1) includes a pair of girder side frames (3A) and (3B) supporting a floor plate (2), end side frames (4A) and (4B) erected on the girder side frames, and joint means (6) for connecting adjacent scaffolding boards in the row installation direction to each other. In the row installation direction, the leading scaffolding plank and the trailing scaffolding plank are suspended by a rope (9), an adjoining process of aligning the girder side frames (3) of both scaffolding boards; a connecting step of connecting both scaffolding boards to each other by the joint means (6); and a joining step of joining the adjacent girder side frames (3) of both scaffolding boards together with the joining device (13). Subsequently, the above-mentioned assembly method is repeated between the leading scaffold board and the trailing scaffold board, so that a large number of scaffold boards are sequentially arranged in a row, A plurality of scaffolding boards connected and integrated by the above-mentioned assembly method are regarded as one unit (U), and units (U1, U2, Un) are constructed one after another, For each unit, at least one scaffold plank among the scaffold planks constituting the unit is maintained in a suspended state by the rope (9), and at least one other scaffold plank has the rope (9) removed and is removed; A method for constructing a suspended scaffold, characterized in that the scaffolding planks that are not suspended by the ropes (9) are supported by the scaffolding planks that are suspended by the ropes (9).

2. In the suspended scaffolding described in claim 1, The scaffolding board has openings (12) between both side edges of the floor board (2) and the gable side frame (4), and both ends (3a) and (3b) of the girder side frame (3) face the openings. The fastener (13) comprises a generally U-shaped metal fitting (17) having upper and lower wings (15 and 16) extending horizontally from the upper and lower ends of the vertical wall portion (14), a latch-type locking member (19) that is vertically movable on one of the upper and lower wings and whose tip is inserted into a slot (18) formed on the other of the upper and lower wings when the latching member is moved downward, and a fixing means (20) that fixes the locking member so that it cannot move with its tip inserted into the slot. A device for constructing a suspended scaffold, characterized in that the vertical wall portion (14) and locking member (19) are attached to both sides of the entire circumference of both ends (3a, 3a) (3b, 3b) of the girder side frame that are overlapped adjacently between a leading scaffolding board and a trailing scaffolding board, and the upper and lower wing portions (15) (16) are attached to the upper and lower portions.

3. In the suspended scaffolding described in claim 1, The scaffolding board has openings (12) between both side edges of the floor board (2) and the gable side frame (4), and both ends (3a) and (3b) of the girder side frame (3) face the openings. The fastener (13) includes a generally U-shaped metal fitting (24) having a pair of support columns (22), (23) fixed to both ends of the side wall portion (21) across each other, a locking member (25) pivotally connected to an end of one of the support columns (22) and having a tip end portion releasably engaged with an end of the other support column (23), and a fixing means (26) for fixing the locking member so as not to be rotatable with the tip end portion of the locking member engaged with the end portion of the other support column. A device for constructing a suspended scaffolding, characterized in that the pair of supports (22)(23) are attached to both sides of the entire circumference of both ends (3a, 3a)(3b, 3b) of the girder side frame that are overlapped adjacently between a leading scaffolding board and a trailing scaffolding board, and the side wall portion (21) and locking member (25) are attached to the upper and lower portions.

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