Suspended scaffolding assembly method and suspended scaffolding assembly device

Abstract

To provide a suspended scaffold assembly method that simplifies a structure and significantly increases an efficiency of an assembly work of a suspended scaffold.SOLUTION: A bridge 1 has an existing suspended scaffold 10 on an underside, and a first guide post 15 is erected on horizontal bracing members for suspension scaffolding 11B, 11C of the suspended scaffold 10, a slide member 30 is provided at the first guide post 15, a temporary stand is installed on the first horizontal bracing member for suspension scaffolding 11C at a very front in an assembly direction, a second horizontal bracing member for suspension scaffolding 18 is placed on the temporary stand, a second guide post 19 is erected on the horizontal bracing member for suspension scaffolding 18, the slide member 30 is fixed to the guide post 19, the slide member 30 is slid in this fixed state to feed the second guide post 19 and the second horizontal bracing member for suspension scaffolding 18, a roller member 12 is placed between the first horizontal bracing member for suspension scaffolding 11C and the second horizontal bracing member for suspension scaffolding 18, a plurality of scaffold plates 13 are placed on them, and the second horizontal bracing member for suspension scaffolding 18 is fixed to the bridge 1 via a cable 14 to sequentially construct new suspended scaffolds 5.SELECTED DRAWING: Figure 28

Description

[Technical Field]

[0001] The present invention relates to a suspended scaffolding assembly method and a suspended scaffolding assembly device for assembling suspended scaffolding used in high-altitude work in structures such as bridges, elevated roads or railways, and power plants. [Background technology]

[0002] Conventional methods for assembling suspended scaffolding used in high-altitude work include the method of constructing suspended scaffolding described in Patent Document 1. The method of constructing suspended scaffolding described in Patent Document 1 involves attaching new joists to a movable hanging jig that can move back and forth along a guide rail fixed to the structure, and then moving the movable hanging jig toward the tip of the guide rail to send the new joists (joists) out from the existing suspended scaffolding to a predetermined position.

[0003] Specifically, the movable lifting jig is connected to an advancing towing member that can move the movable lifting jig forward along the guide rail, and a retreating towing member that can move it backward.By operating the advancing towing member and the retreating towing member from the existing suspended scaffolding, the movable lifting jig can be moved forward and backward to construct the suspended scaffolding. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3924448 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the method of constructing suspended scaffolding described in the above-mentioned Patent Document 1 has the problem of being complicated in structure, since it is necessary to fix a guide rail to the structure and to connect to the movable suspension jig an advancing traction member that moves the movable suspension jig forward along the guide rail and a retreating traction member that moves it backward.

[0006] Furthermore, the above-mentioned method of constructing suspended scaffolding has the problem of poor assembly efficiency, since it requires the replacement of guide rails, etc., every time the next span is sent out. In addition, the height of the joists (joists) must be adjusted every time they are sent out to a specified position, which further reduces the efficiency of assembly work.

[0007] Therefore, an object of the present invention is to provide a suspended scaffolding assembly method and apparatus that can simplify the structure and significantly improve the efficiency of suspended scaffolding assembly work. [Means for solving the problem]

[0008] In order to achieve this object, the invention described in claim 1 is a suspended scaffolding assembly method for assembling suspended scaffolding in sequence along a predetermined direction on the underside of the undersurface of a structure, which includes an existing suspended scaffolding that is suspended in advance via cables on the underside of the structure, a plurality of parent members that are installed at predetermined intervals on the existing suspended scaffolding, each of which has a first guide post erected along the predetermined direction, a slide member that is slidable in the predetermined direction on each of the first guide posts, a plurality of temporary stands that are installed at predetermined intervals in the length direction of a first parent member that is arranged at the forefront of the plurality of parent members in the assembly direction, and the suspended scaffolding to be assembled next is placed on the plurality of temporary stands. a second guide support pillar is erected on the second guide support pillar, the slide member is slidable on the second guide support pillar and is fixed or releasable by a fixing means, the second guide support pillar and the second guide member are sent out a predetermined distance by sliding the slide member in the predetermined direction in the fixed state, a plurality of roller members are arranged between the first guide member and the second guide member, a plurality of scaffolding boards are placed in a direction perpendicular to the plurality of roller members, and the second guide member is fixed to the structure via a cable, thereby sequentially constructing new suspended scaffolding on the existing suspended scaffolding.

[0009] Furthermore, the invention described in claim 2 is characterized in that, in addition to the configuration described in claim 1, two guide supports, including the first guide support and the second guide support, on which the sliding member is slidably mounted, are connected in sequence by a single-tube pipe.

[0010] The invention described in claim 3 is a method for assembling a suspended scaffolding, comprising: an existing suspended scaffolding suspended in advance via a cable below a structure; first guide posts erected along a predetermined direction on a plurality of support members installed at predetermined intervals on the existing suspended scaffolding; slide members provided on each of the first guide posts so as to be slidable in the predetermined direction; a plurality of temporary stands detachably attached at predetermined intervals in the length direction of a first support member arranged at the forefront of the plurality of support members in the assembly direction; and a second support member placed on the temporary stand and constituting the suspended scaffolding to be assembled next. a second guide support erected on the second guide member and capable of being fixed or released to the slide member by a fixing means; the second guide support and the second guide member are advanced a predetermined distance by sliding the slide member, and a plurality of roller members are arranged between the advanced second guide member and the first guide member; a plurality of scaffolding boards placed in a direction perpendicular to the plurality of roller members; and cables for fixing the second guide member to the structure, and new suspended scaffolding is constructed sequentially on the existing suspended scaffolding.

[0011] Furthermore, the invention described in claim 4 is characterized in that, in addition to the configuration described in claim 3, the temporary placement stand is provided with a horizontal section extending horizontally on which the second parent member is placed, and a fall prevention wall extending vertically upward from the horizontal section to prevent the second parent member from falling, and the fall prevention wall is rotatable relative to the horizontal section and is configured to be able to move the second parent member horizontally by tilting it from the vertically upward extending state.

[0012] Furthermore, the invention described in claim 5 is characterized in that, in addition to the configuration described in claim 3, the slide member is made up of parallel rod-shaped members spaced apart at regular intervals above and below, and inclined members are sequentially connected between these rod-shaped members along the length of the rod-shaped members to form a truss structure.

[0013] Furthermore, the invention described in claim 6 is characterized in that, in addition to the configuration described in claim 5, the first guide pillar and the second guide pillar have a holding portion that slidably holds the slide member, and the holding portion has an insertion recess into which the slide member is inserted from an opening with an open top, and an opening / closing lid that allows the insertion recess to be opened and closed, and by closing the opening / closing lid, the slide member inserted into the insertion recess is slidably held.

[0014] Furthermore, the invention described in claim 7 is characterized in that, in addition to the configuration described in any one of claims 3 to 6, it further comprises a single pipe connecting two guide supports including the first guide support and the second guide support on which the sliding member is slidably mounted. [Effects of the Invention]

[0015] According to the invention of claim 1, there is provided an existing suspended scaffolding that is suspended in advance below a structure, and a first guide pillar is erected on each of a plurality of parent members installed on this existing suspended scaffolding, and a slide member is slidably provided on each of these first guide pillars, and a plurality of temporary placement stands are installed at predetermined intervals in the length direction of a first parent member that is arranged at the forefront of the plurality of parent members in the assembly direction, and a second parent member that constitutes the suspended scaffolding to be assembled next is placed on these temporary placement stands, and a second guide pillar is erected on this parent member, and a second guide pillar is erected on the second guide pillar. A slide member is attached to the support so that it can be fixed or released by a fixing means, and by sliding the slide member in a predetermined direction while it is fixed, the second guide support and the second guide member are advanced a predetermined distance, multiple roller members are arranged between the first guide member and the second guide member, multiple scaffolding boards are placed in a direction perpendicular to these roller members, and the second guide member is fixed to the structure via cables.By sequentially constructing new suspended scaffolding on existing suspended scaffolding, it is possible to simplify the structure and significantly improve the efficiency of suspended scaffolding assembly work.

[0016] Furthermore, according to the invention described in claim 2, two guide supports, including the first guide support and the second guide support on which the slide member is slidably mounted, are sequentially connected by a single pipe, thereby preventing the guide support from bending in the assembly direction and providing a path in the assembly direction and a direction perpendicular to the assembly direction, making it possible to flatten the scaffolding members and scaffolding boards.

[0017] According to the invention of claim 3, there is provided an existing suspended scaffolding, a first guide support erected on each of a plurality of guide members installed on the existing suspended scaffolding, a slide member slidably provided on each of these first guide supports, a plurality of temporary placement stands attached at predetermined intervals in the length direction of the first guide member arranged at the forefront of the plurality of guide members, and a second guide member constituting the suspended scaffolding to be assembled next is placed on these temporary placement stands, and a second guide member erected on this second guide member and fixed to the slide member by a fixing means is provided on the temporary placement stands. Therefore, by constructing a new suspended scaffold on an existing suspended scaffold, which includes a second guide support that can be fixed or released, a slide member that slides out the second guide support and second guide member a predetermined distance, a plurality of roller members that are placed between the advanced second guide member and the first guide member, a plurality of scaffolding boards that are placed in a direction perpendicular to the plurality of roller members, and cables that secure the second guide member to the structure, it is possible to simplify the structure and significantly improve the efficiency of assembly work for suspended scaffolding.

[0018] Furthermore, according to the invention described in claim 4, the temporary placement stand is provided with a horizontal section that extends horizontally to place the second parent member on, and a fall prevention wall that extends vertically upward from this horizontal section to prevent the second parent member from falling.This fall prevention wall is rotatable relative to the horizontal section and is configured so that the second parent member can be moved horizontally by being tilted from a vertically upward extending state, thereby making it easy to hold and release the second parent member, thereby further improving work efficiency.

[0019] Furthermore, according to the invention described in claim 5, the slide member has parallel rod-shaped members arranged at regular intervals above and below, and inclined members are sequentially connected between these rod-shaped members along the length of the rod-shaped members to form a truss structure, thereby making it possible to increase the strength of the slide member.

[0020] Furthermore, according to the invention described in claim 6, the first guide pillar and the second guide pillar have a holding portion that slidably holds the slide member, and this holding portion has an insertion recess into which the slide member is inserted from an opening with an open top, and an opening / closing lid that allows the insertion recess to be opened and closed, and by closing this opening / closing lid, the slide member inserted into the insertion recess is slidably held, thereby allowing the slide member to be securely and easily held on the first guide pillar and the second guide pillar.

[0021] Furthermore, according to the invention described in claim 7, by further providing a single-tube pipe connecting two guide supports including the first guide support and the second guide support on which the slide member is slidably mounted, it is possible to prevent the guide supports from bending in the assembly direction, and to provide a path in the assembly direction and in a direction perpendicular to the assembly direction, thereby making it possible to flatten the scaffolding members and scaffolding boards. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a plan view showing a suspended scaffolding assembly procedure 1 according to a first embodiment of a suspended scaffolding assembly method according to the present invention. [Figure 2] FIG. 2 is a side view of FIG. [Figure 3] FIG. 2 is a front view of FIG. [Figure 4] 2 is an enlarged view showing a state in which the guide support of FIG. 1 is fixed to the guide member. [Figure 5] FIG. 2 is a plan view showing a suspended scaffolding assembly procedure 2 according to the first embodiment of the suspended scaffolding assembly method of the present invention. [Figure 6] FIG. 6 is a side view of FIG. 5. [Figure 7] 6(a), (b), and (c) are enlarged front views showing the order in which the slide members are attached to the first guide support pillar in FIG. 5. [Figure 8] 6 is an enlarged plan view showing a state in which the slide member is fixed to the first guide support in FIG. 5. FIG. [Figure 9] 9 is an enlarged perspective view showing a state in which a slide member is fixed to a first guide support in FIG. 8. FIG. [Figure 10] FIG. 2 is a plan view showing a suspended scaffolding assembly procedure 3 according to the first embodiment of the suspended scaffolding assembly method of the present invention. [Figure 11] FIG. 11 is a side view of FIG. [Figure 12] 10(a) and 10(b) are enlarged views showing the order in which the temporary placement table is fixed to the parent / child member arranged at the forefront in the assembly direction of FIG. 9. [Figure 13] 12(a), (b), and (c) are enlarged side views showing the rotational movement of the fall prevention wall of the temporary placement table in FIG. 11. [Figure 14] FIG. 2 is a plan view showing a suspended scaffolding assembly procedure 4 according to the first embodiment of the suspended scaffolding assembly method of the present invention. [Figure 15] FIG. 15 is a side view of FIG. [Figure 16] FIG. 16 is an enlarged view showing part A in FIG. [Figure 17] FIG. 10 is a plan view showing a suspended scaffolding assembly procedure 5 according to the first embodiment of the suspended scaffolding assembly method of the present invention. [Figure 18] FIG. 18 is a side view of FIG. [Figure 19] 18(a) and 18(b) are enlarged views showing the order in which the second guide pole is attached to the second guide member and the guide member in FIG. 17. [Figure 20] 18 is an enlarged plan view showing a state in which a second guide pillar is fixed to the guide member of FIG. 17. FIG. [Figure 21] FIG. 10 is a plan view showing a suspended scaffolding assembly procedure 6 according to the first embodiment of the suspended scaffolding assembly method of the present invention. [Figure 22] FIG. 22 is a side view of FIG. 21. [Figure 23] 22(a), (b), (c), and (d) are explanatory views showing examples of the delivery stroke of the guide member of FIG. 21. [Figure 24] FIG. 10 is a plan view showing a suspended scaffolding assembly procedure 7 according to the first embodiment of the suspended scaffolding assembly method of the present invention. [Figure 25] FIG. 25 is a side view of FIG. 24. [Figure 26] FIG. 8 is a plan view showing a suspended scaffolding assembly procedure 8 according to the first embodiment of the suspended scaffolding assembly method according to the present invention. [Figure 27] FIG. 27 is a side view of FIG. 26. [Figure 28] FIG. 10 is a side view showing a suspended scaffolding assembling procedure 9 according to the first embodiment of the suspended scaffolding assembling method according to the present invention. [Figure 29] FIG. 29 is a front view of FIG. 28. [Figure 30] FIG. 1 is a side view showing a procedure 10 for assembling a suspended scaffolding according to a first embodiment of a suspended scaffolding assembling method according to the present invention. [Figure 31] 31(a) and 31(b) are enlarged plan views showing a state in which the guide member has been slightly moved in the assembly direction relative to the second guide pillar in FIG. 30 and fixed. [Figure 32] FIG. 1 is a plan view showing a suspended scaffolding assembly procedure 11 according to a first embodiment of a suspended scaffolding assembly method according to the present invention. [Figure 33] FIG. 33 is a side view of FIG. 32. [Figure 34] FIG. 10 is a plan view showing a suspended scaffolding assembly procedure 2 according to a second embodiment of the suspended scaffolding assembly method according to the present invention. [Figure 35] 35(a), (b), and (c) are a front view, a plan view, and a side view of the guide member of FIG. 34. [Figure 36] 34A, 34B, and 34C are enlarged front views showing the order in which the slide members are attached to the first guide support, and FIG. 34D is an enlarged plan view showing the state in which the slide members are attached to the first guide support. [Figure 37] FIG. 10 is a plan view showing a suspended scaffolding assembly procedure 3 according to a second embodiment of the suspended scaffolding assembly method according to the present invention. [Figure 38] FIG. 38 is a side view of FIG. 37. [Figure 39] 38 is an enlarged plan view of part B showing the attached state of the single pipe of FIG. 37. FIG. [Figure 40] FIG. 10 is a side view showing a suspended scaffolding assembly procedure 4 according to a second embodiment of the suspended scaffolding assembly method according to the present invention. [Figure 41] 41(a), (b), and (c) are enlarged views showing the order in which the temporary placement table is fixed to the parent / child member arranged at the forefront in the assembly direction of FIG. 40. [Figure 42]41(a), (b), and (c) are enlarged side views showing the rotational movement of the fall prevention wall of the temporary placement table in FIG. 40. [Figure 43] FIG. 10 is a side view showing a suspended scaffolding assembling procedure 5 according to a second embodiment of the suspended scaffolding assembling method according to the present invention. [Figure 44] FIG. 44 is an enlarged view of part C in FIG. 43. [Figure 45] FIG. 10 is a plan view showing a suspended scaffolding assembly procedure 6 according to a second embodiment of the suspended scaffolding assembly method according to the present invention. [Figure 46] FIG. 46 is a side view of FIG. 45. [Figure 47] FIG. 10 is a side view showing a suspended scaffolding assembling procedure 7 according to a second embodiment of the suspended scaffolding assembling method according to the present invention. [Figure 48] 48(a) and 48(b) are an enlarged side view and an enlarged front view showing a first sequence for fixing the first guide pillar and the second guide pillar to the slide member of FIG. 47. [Figure 49] 48(a) and 48(b) are an enlarged side view and an enlarged front view showing a second sequence for fixing the first guide pillar and the second guide pillar to the slide member of FIG. 47. [Figure 50] 48(a) and 48(b) are an enlarged side view and an enlarged front view showing a third step for fixing the first guide pillar and the second guide pillar to the slide member of FIG. 47. [Figure 51] FIG. 10 is a side view showing a suspended scaffolding assembling procedure 8 according to a second embodiment of the suspended scaffolding assembling method according to the present invention. [Figure 52] FIG. 10 is a side view showing a suspended scaffolding assembling procedure 9 according to a second embodiment of the suspended scaffolding assembling method according to the present invention. [Figure 53] FIG. 1 is a side view showing a suspended scaffolding assembly procedure 10 according to a second embodiment of the suspended scaffolding assembly method according to the present invention. [Figure 54] FIG. 1 is a side view showing a suspended scaffolding assembling procedure 11 according to a second embodiment of the suspended scaffolding assembling method according to the present invention. [Figure 55] FIG. 12 is a side view showing a suspended scaffolding assembling procedure 12 according to a second embodiment of the suspended scaffolding assembling method according to the present invention. [Figure 56]FIG. 10 is a side view showing a suspended scaffolding assembling procedure 13 according to a second embodiment of the suspended scaffolding assembling method according to the present invention. [Figure 57] FIG. 10 is a side view showing a suspended scaffolding assembly procedure 14 according to a second embodiment of the suspended scaffolding assembly method according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, an embodiment of the present invention will be described.

[0024] [First embodiment of the invention] 1 to 33 show a first embodiment of a suspended scaffolding assembling method and a suspended scaffolding assembling device according to the present invention.

[0025] Fig. 1 is a plan view showing a suspended scaffolding assembly procedure 1 according to a first embodiment of a suspended scaffolding assembly method according to the present invention. Fig. 2 is a side view of Fig. 1. Fig. 3 is a front view of Fig. 1. Fig. 4 is an enlarged view showing the state in which the guide pillars of Fig. 1 are fixed to the guide members.

[0026] The suspended scaffolding assembly method of this embodiment is used to sequentially assemble suspended scaffolding in a predetermined direction, i.e., along the extension direction of the flange members (main girders) 2, which are made of H-shaped steel, on the underside of the underside of a bridge 1, which is a structure, as shown in Fig. 2. The pair of flange members 2 are installed side by side so as to be parallel to each other in the horizontal direction, as shown in Fig. 3.

[0027] In this embodiment, an existing suspended scaffolding 10 is suspended in advance from the underside of the horizontal lower flanges 2a of a pair of flange members 2 of a bridge 1. As shown in Figure 1, this existing suspended scaffolding 10 has three first support members 11A, 11B, and 11C arranged at a predetermined interval, and a plurality of support members 12 are arranged so as to span between these three first support members 11A, 11B, and 11C at predetermined intervals. A large number of scaffolding boards 13 are placed on these support members 12 so as to be spread out in a direction perpendicular to the direction in which the support members 12 are arranged.

[0028] In the following description, the first, second, and third first parent-child members in the assembly direction (from left to right in FIG. 1) of the three first parent-child members as shown in FIG. 1 will be denoted by the reference numerals 11A, 11B, and 11C, respectively. Furthermore, the third first parent-child member 11C is located at the front in the assembly direction, and therefore will be referred to as the first parent-child member 11C located at the front in the assembly direction.

[0029] One end of a rope 14 such as a chain or wire is fixed to each of the three first guard members 11A, 11B, and 11C at the same position in the longitudinal direction by a rope fixing device 14a, as shown in Figures 2 and 3. The other end of each rope 14 is provided with a gripping device 14b, which is a C-shaped clamp made of, for example, a press bolt and a forged part, and the existing suspended scaffolding 10 is suspended by fixing this gripping device 14b to the horizontal lower flange 2a.

[0030] (Scaffolding assembly procedure 1) Next, a procedure 1 for assembling the suspended scaffolding according to this embodiment will be described.

[0031] Suspended scaffolding assembly procedure 1 according to this embodiment is a process of erecting first guide pillars 15 on the second and third first parent members 11B, 11C on the assembly direction side of the three first parent members 11A, 11B, 11C of an existing suspended scaffolding 10. That is, in suspended scaffolding assembly procedure 1 according to this embodiment, two first guide pillars 15 are erected on each of the two first parent members 11B, 11C so that they are at the same position in the longitudinal direction.

[0032] Here, each of the three first guide members 11A, 11B, and 11C has a longitudinal groove formed therein, and a plurality of fixing pins 11a are attached to each of them at predetermined intervals along the length. As shown in Figure 3, the first guide post 15 has a post fixing device 16 provided at its lower end, a rod portion 17 connected to the upper end of the post fixing device 16, and a holding portion 20 connected to the upper end of the rod portion 17.

[0033] As shown in Figure 4, the support fixing device 16 has a hook portion 16a that hooks onto the fixing pins 11a attached to each of the two first support members 11B, 11C, and a tightening bolt 16b that tightens and fixes the fixing pins 11a after the hook portion 16a hooks onto them.

[0034] Therefore, the first guide support 15 is fixed by using a support support fixture 16 to horizontally hook the hook portion 16a onto each of the fixing pins 11a of the two first guide members 11B, 11C, and then tightening the tightening bolt 16b.

[0035] (Scaffolding assembly procedure 2) Next, a second procedure for assembling the suspended scaffolding according to this embodiment will be described.

[0036] Fig. 5 is a plan view showing a suspended scaffolding assembling procedure 2 according to a first embodiment of the suspended scaffolding assembling method of the present invention. Fig. 6 is a side view of Fig. 5. Figs. 7(a), (b), and (c) are enlarged front views showing the order in which the slide members are attached to the first guide support in Fig. 5. Fig. 8 is an enlarged plan view showing the state in which the slide members are fixed to the first guide support in Fig. 5. Fig. 9 is an enlarged perspective view showing the state in which the slide members are fixed to the first guide support in Fig. 8.

[0037] The suspended scaffolding assembly procedure 2 according to this embodiment is a step of installing a slide member 30 on the holding portion 20 of the first guide support 15 erected on each of the two first parent members 11B, 11C, and fixing the slide member 30 with a guide pin 26 to the first guide support 15 fixed to the first parent member 11C positioned at the forefront in the assembly direction.

[0038] The holding portions 20 of the first guide posts 15 erected on each of the two first guide members 11B, 11C slidably hold the slide member 30, as shown in Figures 5 and 6. Specifically, as shown in Figures 7(a), (b), and (c), the holding portions 20 include an insertion recess 22 into which the slide member 30 is inserted through an opening 21 that is open at the top, an opening / closing cover 23 that is rotatably provided in the insertion recess 22 around a hinge portion 23a, and a toggle clamp 24 that can hold the opening / closing cover 23 in a closed state when closed. Guide rollers 25 are rotatably attached to the insertion recess 22 and the opening / closing cover 23, respectively, and these guide rollers 25 smoothly slidably hold the slide member 30 inserted into the insertion recess 22.

[0039] Therefore, to install the slide member 30 on the holding parts 20 of the two first guide pillars 15 installed in the assembly direction, first, as shown in Fig. 7(a), the open-close lid 23 of each holding part 20 is rotated counterclockwise as indicated by the arrow around the hinge part 23a, and then, as shown in Fig. 7(b), the slide member 30 is inserted by moving it vertically downward as indicated by the arrow from the opening 21 into the insertion recess 22. Next, the open-close lid 23 is rotated clockwise as indicated by the arrow around the hinge part 23a to close the open-close lid 23, and then the toggle clamp 24 holds the open-close lid 23 in its closed state.

[0040] As shown in Figures 8 and 9, the holding portion 20 is provided with a guide pin 26 at the upper end which is formed in an inverted L shape overall and has an operating portion 26a which is bent to allow rotational operation, and a pin support portion 27 which holds the guide pin 26 rotatably and has a notch portion 27a formed in the vertical direction at a predetermined rotation position of the guide pin 26.

[0041] As shown in Figure 6, the slide member 30 has an upper rod-shaped member 31 and a lower rod-shaped member 32 spaced apart vertically, and a plurality of inclined members 33 are sequentially connected and fixed to these upper rod-shaped member 31 and lower rod-shaped member 32 along the length to form a truss structure.

[0042] As shown in Figure 8, two guide holes 34 are formed at a fixed distance from each other at the tip end of the upper rod-shaped member 31 in the assembly direction. Stoppers 35 are fixed to the slide member 30 near both ends in the longitudinal direction. These stoppers 35 are formed in a rectangular frame shape and abut against and engage with the open end of the holding portion 20 of the first guide strut 15, thereby preventing the slide member 30 from coming off.

[0043] Therefore, when operating portion 26a of guide pin 26 is rotated so that operating portion 26a of guide pin 26 is positioned in notch 27a of pin support portion 27, operating portion 26a descends along notch 27a, thereby descending the tip of guide pin 26. As the tip of guide pin 26 descends, the tip of guide pin 26 is inserted into guide hole 34 of upper rod-shaped member 31 of slide member 30, as shown in FIG. 9 . This fixes slide member 30 to holder 20.

[0044] Here, the fixed position of the slide member 30 relative to the first guide support 15 in the longitudinal direction is set at a position where there is space to install the second guide support 19 described later on the slide member 30 between the first guide support 15 and the stopper 35, as shown in Figure 8.

[0045] Conversely, by operating operating portion 26a of guide pin 26 to raise guide pin 26 along notch portion 27a, and then rotating guide pin 26 when it is higher than the upper end surface of pin support portion 27 to support it on the upper end surface of pin support portion 27, the state in which slide member 30 is fixed to holding portion 20 is released, and slide member 30 becomes movable relative to holding portion 20. Therefore, guide pin 26, pin support portion 27, and guide hole 34 of slide member 30 constitute fixing means 28 of this embodiment.

[0046] (Scaffolding assembly steps 3 and 4) Next, steps 3 and 4 of assembling the suspended scaffolding according to this embodiment will be explained together.

[0047] Figure 10 is a plan view showing suspended scaffolding assembly procedure 3 according to the first embodiment of the suspended scaffolding assembly method of the present invention. Figure 11 is a side view of Figure 10. Figures 12(a) and (b) are enlarged views showing the order in which the temporary stand is fixed to the support member arranged at the forefront in the assembly direction of Figure 9. Figures 13(a), (b), and (c) are enlarged side views showing the rotational operation of the fall prevention wall of the temporary stand in Figure 11.

[0048] Fig. 14 is a plan view showing a suspended scaffolding assembling procedure 4 according to the first embodiment of the suspended scaffolding assembling method of the present invention. Fig. 15 is a side view of Fig. 14. Fig. 16 is an enlarged view of part A of Fig. 15.

[0049] The suspended scaffolding assembly procedure 3 according to this embodiment is a step of installing multiple temporary stands 40 at predetermined intervals along the length of the first parent member 11C that is positioned at the front of the multiple first parent members 11A, 11B, 11C in the assembly direction.

[0050] Furthermore, suspended scaffolding assembly procedure 4 according to this embodiment is a step of placing second support members 18 that will constitute the new suspended scaffolding 5 to be assembled next on the multiple temporary stands 40 installed in scaffolding assembly procedure 3.

[0051] In scaffolding assembly procedures 3 and 4, as described above, the tip of guide pin 26 is inserted into guide hole 34 of upper rod-shaped member 31 of slide member 30, and slide member 30 is fixed to holding part 20. In other words, slide member 30 is fixed to two first guide posts 15.

[0052] First, a suspended scaffolding assembly procedure 3 according to this embodiment and the structure of the temporary stand 40 will be described.

[0053] In this embodiment, as shown in Figures 10 and 11, two temporary placement tables 40 are installed at a predetermined interval in the longitudinal direction of the parent member 11C arranged at the forefront in the assembly direction. This predetermined interval is an interval that reliably and stably holds the second parent member 18. Note that, although two temporary placement tables 40 are installed in this embodiment, more than two may be installed.

[0054] The temporary placement table 40 includes a fixed portion 41 that is fixed to the first parent member 11C that is positioned at the front in the assembly direction as shown in Figures 13(a), (b), and (c), a horizontal portion 42 that extends horizontally from the fixed portion 41 and on which the second parent member 18 shown in Figures 14 to 16 is placed, and a fall prevention wall 43 that extends vertically upward from the horizontal portion 42 and prevents the second parent member 18 from falling.

[0055] The fixing part 41 is formed in a U-shape when viewed from the side as shown in Figures 13(a), (b), and (c). When viewed from the front as shown in Figures 12(a) and (b), the fixing part 41 includes a locking plate 41a formed in a rectangular shape, an insertion groove 41b formed by cutting out a horizontal portion of the locking plate 41a, and a fixing bolt 41c.

[0056] Therefore, to attach the temporary table 40 to the first parent member 11C located at the forefront in the assembly direction, first, as shown in Fig. 12(a), the locking plate 41a is fitted into the long groove formed along the length of the first parent member 11C located at the forefront in the assembly direction. Next, as shown in Fig. 12(b), the locking plate 41a is moved horizontally in the direction of the arrow, and the fixing pin 11a of the first parent member 11C enters and is locked into the insertion groove 41b. After that, the fixing bolt 41c is tightened to fix the temporary table 40 to the first parent member 11C.

[0057] 13(a), (b), and (c), a reinforcing portion 42a having an inclined portion is fixed to the horizontal portion 42. When the second parent member 18 is placed on the horizontal portion 42, the reinforcing portion 42a guides the second parent member 18 from the inclined portion of the reinforcing portion 42a to the horizontal surface of the horizontal portion 42, facilitating positioning and temporary placement. Additionally, by fixing the reinforcing portion 42a to the horizontal portion 42, the strength of the temporary placement table 40 as a whole can be increased. An insertion slit 42b is formed in the horizontal portion 42 near the fall prevention wall 43 and extending in the width direction. A pivot shaft 42c is provided near the insertion slit 42b and at the front end of the horizontal portion 42 in the assembly direction.

[0058] The fall prevention wall 43 is rotatably attached to the horizontal portion 42, and by tilting it from the state where it extends vertically upward as shown in FIG. 16, the second yoke member 18 can be horizontally moved.

[0059] Specifically, the fall prevention wall 43 is formed in a U-shaped cross-section. The fall prevention wall 43 has a long hole 43a formed therein for attachment to a rotation shaft 42c fixed to the horizontal portion 42. By forming this long hole 43a, the fall prevention wall 43 can rotate about the rotation shaft 42c and can move by the length of the long hole 43a with respect to the rotation shaft 42. The fall prevention wall 43 is provided with a tongue piece 43b integrally formed in a plate shape near the long hole 43a, which can be inserted into and removed from an insertion slit 42b of the horizontal portion 42.

[0060] Therefore, the fall prevention wall 43 can be rotated about the rotation shaft 42c by pulling it upward along the long hole 43a attached to the rotation shaft 42c fixed to the horizontal portion 42 and detaching the tongue piece 43b from the insertion slit 42b. By tilting it from the state where it extends vertically upward, the second yoke member 18 can be horizontally moved.

[0061] Further, the fall prevention wall 43 is rotated 180 degrees counterclockwise as shown by the arrow in FIG. 13(a), and after being in the state of extending vertically as shown in FIG. 13(b), the fall prevention wall 43 is moved downward along the long hole 43a with respect to the rotation shaft 42 as shown by the arrow from that state, so that the tongue piece 43b is inserted into the insertion slit 42b and the vertical state of the fall prevention wall 43 is maintained as shown in FIG. 13(c). Thereby, when the second yoke member 18 is placed on the horizontal portion 42 as shown in FIGS. 14 to 16, the fall prevention wall 43 can reliably hold the second yoke member 18.

[0062] (Scaffold assembly procedure 5) Next, the suspension scaffold assembly procedure 5 according to the present embodiment will be described.

[0063] Figure 17 is a plan view showing suspended scaffolding assembling procedure 5 according to a first embodiment of the suspended scaffolding assembling method of the present invention. Figure 18 is a side view of Figure 17. Figures 19(a) and 19(b) are enlarged views showing the order in which the second guide pole is attached to the second guide member and guide member of Figure 17. Figure 20 is an enlarged plan view showing the fixed state of the second guide pole to the guide member of Figure 17.

[0064] Suspended scaffolding assembly procedure 5 according to this embodiment is a step of attaching a second guide pillar 19 to the slide member 30 attached in scaffolding assembly procedure 2 and the second parent member 18 installed in scaffolding assembly procedure 4. In other words, suspended scaffolding assembly procedure 5 is a step of erecting the second guide pillar 19 on the second parent member 18 installed in scaffolding assembly procedure 4. Note that the second guide pillar 19 has the same structure as the first guide pillar 15 described above, and therefore the same parts will be described using the same reference numerals.

[0065] In the suspended scaffolding assembly procedure 5, the slide member 30 is fixed to the first guide support 15 and the second guide support 19.

[0066] As shown in Figures 17 to 20, the second guide pillar 19 is arranged between the fixed position of the first guide pillar 15 and the slide member 30 and a stopper 35 fixed near the tip of the slide member 30 in the assembly direction.

[0067] The second guide support 19 is fixed to the second support member 18 by using the support member fixing device 16 to hook the hook portion 16a horizontally onto the fixing pin 11a of the second support member 18, and then tightening the tightening bolt 16b.

[0068] 19(a), the opening / closing lid 23 of the holding part 20 is rotated counterclockwise around the hinge part 23a to open it, and the lower rod-shaped part 32 to the upper rod-shaped part 31 of the sliding member 30 are fitted into the opening 21 of the holding part 20 in this order as shown in FIG. 19(b). Next, the opening / closing lid 23 is rotated clockwise around the hinge part 23a to close the opening / closing lid 23, and the toggle clamp 24 then holds the opening / closing lid 23 in the closed state.

[0069] Thereafter, as described above, the guide pin 26 is inserted into the guide hole 34 formed on the tip side of the upper rod-shaped member 31 in the assembly direction, and the slide member 30 is fixed to the holding portion 20 of the second guide support 19.

[0070] (Scaffolding assembly procedure 6) Next, a suspended scaffolding assembly procedure 6 according to this embodiment will be described.

[0071] Figure 21 is a plan view showing a suspended scaffolding assembling procedure 6 according to a first embodiment of the suspended scaffolding assembling method of the present invention. Figure 22 is a side view of Figure 21. Figures 23(a), (b), (c), and (d) are explanatory diagrams showing an example of the feed stroke of the guide member of Figure 21.

[0072] The suspended scaffolding assembly procedure 6 according to this embodiment involves rotating the fall prevention wall 43 of the temporary stand 40 clockwise to tilt it down, removing the guide pin 26 of the first guide support 15 at the tip end in the assembly direction to release it from its fixed state with the guide member 30, and then extending the second guide support 19 to the desired stroke.

[0073] In suspended scaffolding assembly procedure 6, the slide member 30 is fixed to the second guide support 19, and the guide pin 26 of the first guide support 15 is disengaged from the guide hole 34 of the slide member 30.

[0074] As shown in Figures 21 and 22, in procedure 6 of assembling the suspended scaffolding according to this embodiment, the fall prevention wall 43 of the temporary stand 40 is moved upward to disengage its tongue 43b from the insertion slit 42b of the horizontal section 42, and then the fall prevention wall 43 is rotated clockwise around the pivot axis 42c to send out the second guide support 19 to the desired stroke.

[0075] Next, we will explain the stroke for feeding out the guide member 30. This stroke is the distance between the first guide member 11C, which is arranged at the forefront in the assembly direction when the guide member 30 is fed out, and the second guide support 19. In other words, it is the distance between the second guide support 19 and the first guide support 15 when the guide member 30 is fed out.

[0076] 21, a dozen or so guide holes 34 are formed along the length of the upper rod-shaped member 31 of the guide member 30. When the second guide pillar 19 is advanced at a given stroke, the guide pins 26 of the first guide pillar 15 are inserted into the respective guide holes 34, thereby fixing the position and setting the stroke.

[0077] 23(a) shows an example in which the guide member 30 is advanced and the first guide pillar 15 is fixed to the third guide hole 34-3 from the leading end in the assembly direction, and in this example, the stroke S1 is 942 mm. Note that the second guide pillar 19 is fixed to the position of the first guide hole from the leading end of the guide member 30 in the assembly direction.

[0078] FIG. 23(b) shows an example in which the guide member 30 is advanced and the first guide pillar 15 is fixed to the fourth guide hole 34-4 from the tip side in the assembly direction, and in this example the stroke S2 ​​is 1245 mm.

[0079] FIG. 23(c) shows an example in which the guide member 30 is sent out and the first guide pillar 15 is fixed to the fifth guide hole 34-5 from the tip side in the assembly direction, and in this example, the stroke S3 is 1550 mm.

[0080] 23(d) shows an example in which the guide member 30 is fed out and the first guide pillar 15 is fixed in the sixth guide hole 34-6 from the leading end in the assembly direction, and in this example, the stroke S4 is 1855 mm. In this way, the stroke for feeding out the guide member 30 can be adjusted as desired based on the fixing position of the first guide pillar 15 in the guide hole from the leading end of the guide member 30 in the assembly direction.

[0081] (Scaffolding assembly procedure 7) Next, a seventh procedure for assembling the suspended scaffolding according to this embodiment will be described.

[0082] Fig. 24 is a plan view showing a suspended scaffolding assembling procedure 7 according to the first embodiment of the suspended scaffolding assembling method according to the present invention. Fig. 25 is a side view of Fig. 24.

[0083] Suspended scaffolding assembly procedure 7 according to this embodiment is a process of removing the temporary stand 40 from the parent member 11C at the tip end in the assembly direction. This removed temporary stand 40 will be used when assembling the next suspended scaffolding. In suspended scaffolding assembly procedure 7, the slide member 30 is fixed to the first guide support 15 and the second guide support 19.

[0084] As shown in Fig. 12(b), when the fixing pin 11a of the first parent member 11C is inserted into the insertion groove 41b and locked into place, the fixing bolt 41c is loosened, allowing the locking plate 41a to be moved horizontally in the direction opposite to the arrow, as shown in Fig. 12(a). Then, when the insertion groove 41b disengages the locking plate 41a from the fixing pin 11a of the first parent member 11C, the locked state is released, and the temporary stand 40 can be removed from the first parent member 11C, as shown in Figs. 24 and 25.

[0085] (Scaffolding assembly procedure 8) Next, a suspended scaffolding assembly procedure 8 according to this embodiment will be described.

[0086] 26 is a plan view showing a suspended scaffolding assembling procedure 8 according to the first embodiment of the suspended scaffolding assembling method according to the present invention.

[0087] The suspended scaffolding assembly procedure 8 in this embodiment is a process of placing multiple (six in this embodiment) support members 12 at regular intervals between the second support member 18 sent out by the suspended scaffolding assembly procedure 6 and the first support member 11C placed at the front, and placing multiple scaffolding boards 13 in a direction perpendicular to the support members 12.

[0088] In the suspended scaffolding assembly procedure 8, the slide member 30 is fixed to the first guide support 15 and the second guide support 19.

[0089] Although not shown, the support member 12 has hooks on both ends, and these hooks are respectively hooked into grooves formed along the length of the second support member 18 and the first support member 11C arranged for the forefront, thereby bridging between the second support member 18 and the first support member 11C arranged for the forefront. A plurality of scaffolding boards 13 are then placed on the plurality of support members 12 so as to be spread out in a direction perpendicular to the support members 12.

[0090] Here, in suspended scaffolding assembly procedure 8, when multiple support members 12 are arranged and multiple scaffolding boards 13 are placed in a direction perpendicular to the support members 12, the loads of these members are applied to the slide member 30 via the first guide support 15 and the second guide support 19. In this case, since the slide member 30 has a truss structure as described above and has high support strength, it is possible to adequately support the multiple support members 12 and scaffolding boards 13, as well as workers working on the scaffolding boards 13.

[0091] (Scaffolding assembly procedure 9) Next, a suspended scaffolding assembly procedure 9 according to this embodiment will be described.

[0092] Fig. 28 is a side view showing a suspended scaffolding assembling procedure 9 according to the first embodiment of the suspended scaffolding assembling method according to the present invention. Fig. 29 is a front view of Fig. 28.

[0093] The suspended scaffolding assembling procedure 9 according to this embodiment is a process of suspending and fixing the second support member 18 to the lower flange 2a via the cable 14.

[0094] As shown in Figures 28 and 29, new cables 14 are attached to the second support member 18 at the same position in the assembly direction as the cables 14 attached to the existing suspended scaffolding 10. One end of the new cables 14 is attached to the second support member 18 by a cable fixing device 14a, and the other end is provided with a gripping device 14b, which is a C-clamp made up of, for example, a press bolt and a forged part, and this gripping device 14b is fixed to the horizontal bottom flange 2a, whereby the next new suspended scaffolding 5 assembled according to the above procedure is suspended.

[0095] Here, when the second support member 18 is suspended and fixed to the lower flange 2a via the rope 14, the worker can perform the installation work on the new suspended scaffolding 5, thereby further improving workability and safety.

[0096] (Scaffolding assembly procedure 10) Next, a procedure 10 for assembling a suspended scaffold according to this embodiment will be described.

[0097] Figure 30 is a side view showing a suspended scaffolding assembling procedure 10 according to a first embodiment of the suspended scaffolding assembling method of the present invention. Figures 31(a) and 31(b) are enlarged plan views showing a state in which the guide member has been slightly moved in the assembly direction relative to the second guide support pole in Figure 30 and fixed.

[0098] The suspended scaffolding assembly procedure 10 according to this embodiment is a process of slightly moving the guide member 30 relative to the second guide support 19 in the assembly direction and fixing it.

[0099] As shown in Figures 30 and 31(a) and (b), the guide pin 26 of the holding portion 20 of the second guide support 19 is removed, the slide member 30 is slightly advanced, and the guide pin 26 is inserted into the second guide hole 34 from the tip side of the slide member 30 in the assembly direction, thereby fixing the slide member 30 to the second guide support 19.

[0100] Here, the length by which the slide member 30 is advanced relative to the second guide support 19 is set to a length that allows a third guide support (not shown) to be installed on the slide member 30 between the second guide support 19 and the stopper 35, as shown in Figure 31(b). This length is set to the same length as in Figure 8.

[0101] (Scaffolding assembly procedure 11) Next, a procedure 11 for assembling the suspended scaffolding according to this embodiment will be described.

[0102] Fig. 32 is a plan view showing a suspended scaffolding assembling procedure 11 according to the first embodiment of the suspended scaffolding assembling method according to the present invention. Fig. 33 is a side view of Fig. 32.

[0103] The suspended scaffolding assembly procedure 11 according to this embodiment is a process of installing a plurality of temporary stands 40 at predetermined intervals in the length direction of the second support member 18.

[0104] When installing the temporary stand 40 on the second support member 18, the worker can perform the installation work on the new suspended scaffolding 5, thereby further improving workability and safety.

[0105] The structure of the temporary stand 40 in scaffolding assembly procedure 11 is the same as the structure explained in Figures 10 to 13, so the explanation thereof will be omitted. Also, the installation order of the temporary stand 40 is the same as the installation order explained in the above-mentioned scaffolding assembly procedure 3, so the explanation thereof will be omitted.

[0106] (Scaffolding assembly steps 12 and 13) Furthermore, scaffolding assembly procedure 12 is a process of placing a third support member (not shown) having a structure similar to that of the second support member 18 on the temporary support member 40 newly installed in scaffolding assembly procedure 11, which will then constitute a new suspended scaffolding to be assembled on multiple temporary support members 40 as shown in Figures 14 to 16.

[0107] Then, scaffolding assembly procedure 13 is a step of attaching a third guide support (not shown) having a structure similar to that of the second guide support to the third guide member installed in scaffolding assembly procedure 12.

[0108] Furthermore, the slide member 30 is slid to advance the third guide support to an arbitrary stroke. At this time, the stopper 35 fixed to the slide member 30 at the rear end in the assembly direction is removed beforehand. Therefore, the first guide support 15 from which the slide member 30 has been detached is removed and reused when assembling the next new suspended scaffolding 5. Then, by sequentially repeating scaffolding assembly procedures 6 to 13, new suspended scaffoldings 5 ​​can be sequentially constructed on the existing suspended scaffolding 10.

[0109] As described above, according to the suspended scaffolding assembly method of this embodiment, an existing suspended scaffolding 10 is suspended in advance below the bridge 1, a first guide pillar 15 is erected on each of a plurality of parent members 11B, 11C installed on this existing suspended scaffolding 10, a slide member 30 is slidably attached to each of these first guide pillars 15, a plurality of temporary placement stands 40 are installed at predetermined intervals in the length direction of the first parent member 11C that is arranged at the forefront in the assembly direction of the plurality of parent members 11B, 11C, a second parent member 18 that will constitute a new suspended scaffolding 5 to be assembled next is placed on these temporary placement stands 40, and a second guide pillar 19 is attached to this parent member 18. The first guide support 11C is erected, and a slide member 30 is fixed or releasably attached to the second guide support 19 by a fixing means 28. By sliding the slide member 30 in a predetermined direction while in the fixed state, the second guide support 19 and the second guide member 18 are advanced a predetermined distance, and multiple support members 12 are placed between the first guide member 11C and the second guide member 18. Multiple scaffolding boards 13 are placed in a direction perpendicular to the support members 12, and the second guide member 18 is fixed to the bridge 1 via cables 14. By sequentially constructing new suspended scaffolding 5 on the existing suspended scaffolding 10, the structure can be simplified and the efficiency of the assembly work of the suspended scaffold can be significantly improved. In addition, there is no need to adjust the height each time a guide member is advanced to a predetermined position, and there is no need for reassembly work, which further improves the efficiency of the assembly work.

[0110] Furthermore, according to the suspended scaffolding assembly device of this embodiment, an existing suspended scaffolding 10, first guide posts 15 erected on each of a plurality of guide members 11B, 11C installed on this existing suspended scaffolding 10, slide members 30 slidably installed on each of these first guide posts 15, a plurality of temporary placement stands 40 attached at predetermined intervals in the length direction of the first guide member 11A arranged at the forefront of the plurality of guide members 11B, 11C, and a second guide member 18 constituting a new suspended scaffolding 5 to be assembled next is placed on these temporary placement stands 40, and the second guide member 18 erected on this second guide member 18 and attached to the slide member 30 The scaffolding 5 comprises a second guide support 19 that can be fixed or released by a fixing means 28, a slide member 30 that slides out the second guide support 19 and second guide member 18 a predetermined distance, a plurality of roller members 12 that are placed between the second guide member 18 that has been sent out and the first guide member 11C, a plurality of scaffolding boards 13 that are placed in a direction perpendicular to the plurality of roller members 12, and cables 14 that fix the second guide member 18 to the bridge 1, and by constructing a new suspended scaffolding 5 on the existing suspended scaffolding 10, it is possible to simplify the structure and significantly improve the efficiency of the suspended scaffold assembly work.

[0111] In addition, according to the suspended scaffolding assembly device of this embodiment, the temporary placement platform 40 is provided with a horizontal section 42 that extends horizontally and on which the second parent member 18 is placed, and a fall prevention wall 43 that extends vertically upward from this horizontal section 42 and prevents the second parent member 18 from falling.This fall prevention wall 43 is rotatable relative to the horizontal section 42 and is configured to be able to move the second parent member 18 horizontally by tilting it from a state in which it extends vertically upward, making it easy to hold and release the second parent member 18, thereby further improving work efficiency.

[0112] Furthermore, according to the suspended scaffolding assembly device of this embodiment, the slide member 30 is made up of upper rod-shaped members 31 and lower rod-shaped members 32 arranged in parallel at a fixed interval above and below, and inclined members 33 are sequentially connected between these upper rod-shaped members 31 and lower rod-shaped members 32 along the length direction of the upper rod-shaped members 31 and lower rod-shaped members 32 to form a truss structure, which makes it possible to increase the strength of the slide member 30.

[0113] In addition, according to the suspended scaffolding assembly device of this embodiment, the first guide pillar 15 and the second guide pillar 19 have a holding portion 20 that slidably holds the slide member 30, and this holding portion 20 has an insertion recess 22 into which the slide member 30 is inserted from an opening 21 that is open at the top, and an opening / closing lid 23 that allows this insertion recess 22 to be opened and closed.By closing this opening / closing lid 23, the slide member 30 inserted into the insertion recess 22 is slidably held, and the slide member 30 can be securely and easily held on the first guide pillar 15 and the second guide pillar 19.

[0114] [Second embodiment of the invention] 34 to 57 show a second embodiment of a suspended scaffolding assembling method and suspended scaffolding assembling device according to the present invention. Note that parts that are the same as or correspond to those in the first embodiment are given the same reference numerals and redundant explanations will be omitted.

[0115] The suspended scaffolding assembly method and suspended scaffolding assembly device of this embodiment, like Fig. 2 of the first embodiment, are used to sequentially assemble suspended scaffolding in a predetermined direction below the underside of the underside of a pair of flange members (main girders) 2 made of H-shaped steel in a bridge 1, i.e., along the extension direction of the flange members (main girders) 2. The pair of flange members 2 are installed side by side so as to be parallel to each other in the horizontal direction as shown in Fig. 3.

[0116] (Scaffolding assembly procedure 1) Next, a procedure 1 for assembling the suspended scaffolding according to this embodiment will be described.

[0117] In this embodiment, as in the first embodiment, an existing suspended scaffolding 10 is suspended in advance. Then, in the suspended scaffolding assembly procedure 1 according to this embodiment, as in the first embodiment shown in Figures 1 to 3, two first guide pillars 15 are erected on each of the two first parent members 11B, 11C so that they are at the same position in the longitudinal direction, as shown in Figure 34. The fixing structure and fixing method for fixing the first guide pillars 15 to the two first parent members 11B, 11C use the pillar fixing device 16 as in the first embodiment shown in Figure 4, and therefore a description thereof will be omitted.

[0118] (Scaffolding assembly procedure 2) Next, a second procedure for assembling the suspended scaffolding according to this embodiment will be described.

[0119] Figure 34 is a plan view showing suspended scaffolding assembling procedure 1 according to a second embodiment of the suspended scaffolding assembling method of the present invention. Figures 35(a), (b), and (c) are a front view, a plan view, and a side view of the guide member of Figure 34. Figures 36(a), (b), and (c) are enlarged front views showing the order in which the slide members are attached to the first guide support of Figure 34, and (d) is an enlarged plan view showing the state in which the slide members are attached to the first guide support.

[0120] The suspended scaffolding assembly procedure 2 according to this embodiment is a step of installing a slide member 30 on the holding portion 20 of the first guide support 15 erected on each of the two first parent members 11B, 11C, and fixing the slide member 30 to the first guide support 15 fixed to the first parent member 11C positioned at the forefront in the assembly direction using an upper fixing pin 29a and a lower fixing pin 29b.

[0121] As shown in Figures 35(a) and (c), the slide member 30 has an upper rod-shaped member 31 and a lower rod-shaped member 32 spaced apart vertically, and a plurality of inclined members 33 are sequentially connected and fixed to these upper rod-shaped member 31 and lower rod-shaped member 32 along the length to form a truss structure.

[0122] 35(b), seven guide holes 31a to 31g are formed in the upper rod-shaped member 31 from the tip end to the center in the assembly direction. In addition, seven guide holes 32a to 32g are formed in the lower rod-shaped member 32 from the tip end to the center in the assembly direction at the same positions in the longitudinal direction as the seven guide holes 31a to 31g of the upper rod-shaped member 31.

[0123] Of the seven guide holes 31a to 31g of the upper rod-shaped member 31 and the seven guide holes 32a to 32g of the lower rod-shaped member 32, guide holes 31a and 32a are used when fixing to the first guide support 15 or the second guide support 19. Guide holes 31b and 32b are used when feeding out the slide member 30 in scaffolding assembly procedure 13, which will be described later. Guide holes 31c and 32c are used before feeding out the slide member 30.

[0124] Guide holes 31d and 32d are used when advancing slide member 30 a stroke of 942 mm. Guide holes 31e and 32e are used when advancing slide member 30 a stroke of 1245 mm. Guide holes 31f and 32f are used when advancing slide member 30 a stroke of 1550 mm. Guide holes 31g and 32g are used when advancing slide member 30 a stroke of 1855 mm.

[0125] 35(a), (b), and (c), the slide member 30 is provided at each end with an index plunger 36 and a rectangular rotation stopper 37 that can be rotated 90 degrees by an operator pulling the index plunger 36. Therefore, when an operator pulls the index plunger 36, the operator rotates the rotation stopper 37 by 90 degrees, for example, and the rotation stopper 37 abuts against and engages with the open end of the holding portion 20 of the first guide column 15 or the second guide column 19. When the rotation stopper 37 is further rotated by 90 degrees, the rotation stopper 37 can be inserted into the insertion recess 22 of the first guide column 15 or the second guide column 19. The rectangular rotation stopper 37 rotates and abuts against and engages with the open end of the holding portion 20 of the first guide column 15 or the second guide column 19 (described later), thereby preventing the slide member 30 from coming off.

[0126] 36(a), (b), and (c), the holding section 20 includes an insertion recess 22 into which the slide member 30 is inserted through an opening 21 that is open at the top, an opening / closing lid 23 that is rotatably attached to the insertion recess 22 around a hinge portion 23a, and a toggle clamp 24 that can hold the opening / closing lid 23 in a closed state when closed. The toggle clamp 24 has a locking function. Guide rollers 25 are rotatably attached to the insertion recess 22 and the opening / closing lid 23, respectively, and these guide rollers 25 hold the slide member 30 inserted into the insertion recess 22 so that it can slide smoothly.

[0127] Therefore, to install the slide member 30 on the holding parts 20 of the two first guide pillars 15 installed in the assembly direction, first, as shown in Figure 36(a), the open-close lid 23 of each holding part 20 is rotated clockwise as indicated by the arrow around the hinge part 23a, and then the slide member 30 is inserted by moving it vertically downward as indicated by the arrow from the opening 21 into the insertion recess 22 as shown in Figure 36(a). Next, as shown in Figure 36(b), the open-close lid 23 is rotated counterclockwise as indicated by the arrow around the hinge part 23a to close the open-close lid 23, and then the toggle clamp 24 is closed until it is locked, maintaining the open-close lid 23 in its closed state.

[0128] 36(c) and (d), an upper fixing pin 29a and a lower fixing pin 29b are detachably provided on the holding portion 20. The upper fixing pin 29a is formed in an L-shape and is inserted from the top surface of the holding portion 20 into one of seven guide holes 31a to 31g of the upper rod-shaped member 31 to be fixed. The lower fixing pin 29b is formed in a rod shape and is inserted from the lower side surface of the holding portion 20 into one of seven guide holes 32a to 32g of the lower rod-shaped member 32 to be fixed. Here, the lower fixing pin 29b is inserted into one of seven guide holes 32a to 32g of the lower rod-shaped member 32 that is located at the same position as one of the seven guide holes 31a to 31g of the upper rod-shaped member 31, thereby fixing the slide member 30 to the first guide support 15 or a second guide support 19 described later.

[0129] The holding part 20 is provided with a single pipe clamp 50 at the bottom on one side thereof as shown in FIGS. 36(a) to (c) for fixing a single pipe, which will be described later.

[0130] (Scaffolding assembly procedure 3) Next, a third procedure for assembling the suspended scaffolding according to this embodiment will be described.

[0131] Figure 37 is a plan view showing a suspended scaffolding assembling procedure 3 according to a second embodiment of the suspended scaffolding assembling method according to the present invention. Figure 38 is a side view of Figure 37. Figure 39 is an enlarged plan view of part B showing the attached state of the single pipe of Figure 37.

[0132] The suspended scaffolding assembly procedure 3 in this embodiment is a step of connecting the first guide support 15 fixed to the first parent member 11C located at the forefront in the assembly direction and the first guide support 15 fixed to the first parent member 11B located second from the front in the assembly direction with a single pipe 51.

[0133] In suspended scaffolding assembly procedure 3, the tip of the slide member 30 is fixed to the first guide support 15, which is fixed to the first guide member 11C placed at the forefront in the assembly direction in suspended scaffolding assembly procedure 2, by the upper fixing pin 29a and the lower fixing pin 29b.

[0134] As described above, the ends of the single pipe clamps 50 are fixed to the holding portions 20 of the two first guide struts 15, and by using these single pipe clamps 50 to fix the single pipes 51 as shown in Figures 37 to 39, the first guide strut 15 fixed to the first parent member 11C located foremost in the assembly direction is connected to the first guide strut 15 fixed to the first parent member 11B located second from the front in the assembly direction. Then, each time a new suspended scaffolding 5 to be assembled is installed, the guide strut fixed to the parent member located foremost in the assembly direction and the guide strut 15 fixed to the parent member located second from the front in the assembly direction are sequentially connected by the single pipes 51.

[0135] In this way, by connecting the first guide support 15 fixed to the first parent member 11C and the first guide support 15 fixed to the first parent member 11B with a single-tube pipe 51, it is possible to prevent the first guide support 15 from bending in the assembly direction, and to provide alignment in the assembly direction and in a direction perpendicular to the assembly direction, thereby making it possible to flatten the scaffolding members 12 and scaffolding boards 13.

[0136] (Scaffolding assembly steps 4 and 5) Next, steps 4 and 5 of assembling the suspended scaffolding according to this embodiment will be described.

[0137] Figure 40 is a side view showing suspended scaffolding assembly procedure 4 according to a second embodiment of the suspended scaffolding assembly method according to the present invention. Figures 41(a), (b), and (c) are enlarged views showing the order in which the temporary stand is fixed to the support member arranged at the forefront in the assembly direction of Figure 40. Figures 42(a), (b), and (c) are enlarged side views showing the rotational operation of the fall prevention wall of the temporary stand in Figure 40.

[0138] 43 is a side view showing a suspended scaffolding assembling procedure 5 according to the second embodiment of the suspended scaffolding assembling method according to the present invention. FIG. 44 is an enlarged view of part C in FIG.

[0139] The suspended scaffolding assembly procedure 4 in this embodiment is a step of installing multiple temporary stands 40 at predetermined intervals along the length of the first parent member 11C that is positioned at the front of the multiple first parent members 11A, 11B, 11C in the assembly direction.

[0140] Furthermore, suspended scaffolding assembly procedure 5 according to this embodiment is a step of placing second support members 18 that will constitute the new suspended scaffolding 5 to be assembled next on the multiple temporary stands 40 installed in scaffolding assembly procedure 4.

[0141] In scaffolding assembly procedures 4 and 5, as in scaffolding assembly procedures 2 and 3 described above, the tip of upper fixing pin 29a is inserted into guide hole 31a of upper rod-shaped member 31 of slide member 30, and the tip of lower fixing pin 29b is inserted into guide hole 32a of lower rod-shaped member 32 of slide member 30, so that slide member 30 is fixed to holding part 20. In other words, slide member 30 is fixed to two first guide supports 15.

[0142] In this embodiment, similarly to the first embodiment, two temporary placement tables 40 are provided at a predetermined interval in the longitudinal direction of the parent member 11C arranged at the forefront in the assembly direction.

[0143] The temporary placement stand 40 comprises a fixed portion 41 fixed to the first parent member 11C arranged at the front in the assembly direction as shown in Figures 42(a), (b), and (c), a horizontal portion 42 extending horizontally from this fixed portion 41 and on which the second parent member 18 shown in Figures 43 and 44 is placed, and a fall prevention wall 43 extending vertically upward from this horizontal portion 42 to prevent the second parent member 18 from falling.

[0144] The fixing part 41 is formed in an inverted L-shape when viewed from the side as shown in Figures 42(a), (b), and (c). As shown in Figures 41(a), (b), and (c), the fixing part 41 includes a rectangular locking plate 41a, an insertion groove 41b formed by cutting out the locking plate 41a in the horizontal direction, and a knob 44.

[0145] Therefore, to attach the temporary stand 40 to the first parent member 11C arranged at the forefront in the assembly direction, first, as shown in Figures 41(a) and (b), the locking plate 41a is fitted into the long groove formed along the length of the first parent member 11C arranged at the forefront in the assembly direction, and then the knob 44 is pulled upward. Next, as shown in Figure 41(c), the locking plate 41a is moved horizontally, and the insertion groove 41b fits into and locks onto the fixing pin 11a of the first parent member 11C, and then the knob 44 is tightened to fix the temporary stand 40 to the first parent member 11C.

[0146] 42(a), (b), and (c), a reinforcing portion 42a having an inclined portion is fixed to the horizontal portion 42. When the second parent member 18 is placed on the horizontal portion 42, the reinforcing portion 42a guides the second parent member 18 from the inclined portion of the reinforcing portion 42a to the horizontal surface of the horizontal portion 42, making it easier to position the second parent member 18. The horizontal portion 42 also has a rectangular insertion slit 42b, as shown in FIG. 42(a), formed near the fall prevention wall 43 and extending in the width direction. A pivot shaft 42c that rotatably supports the fall prevention wall 43 is provided near the insertion slit 42b and at the front end of the horizontal portion 42 in the assembly direction.

[0147] The fall prevention wall 43 is rotatably attached to the horizontal portion 42, and can be rotated clockwise from a position extending vertically upward as shown in Figure 40 and tilted down as shown in Figure 42(a), thereby allowing the second guard member 18 to move horizontally.

[0148] Specifically, the fall prevention wall 43 is formed with a U-shaped cross section as shown in Figure 42(a). The fall prevention wall 43 is formed with an elongated hole 43a that is attached to a rotation shaft 42c fixed to the horizontal portion 42. By forming this elongated hole 43a, the fall prevention wall 43 is rotatable around the rotation shaft 42c and is also movable relative to the rotation shaft 42 by the length of the elongated hole 43a. The fall prevention wall 43 is provided with a tongue piece 43b that is formed integrally with the fall prevention wall 43 in the vicinity of the elongated hole 43a and that can be inserted into and removed from the insertion slit 42b of the horizontal portion 42.

[0149] Therefore, the fall prevention wall 43 is pulled upward along the long hole 43a attached to the pivot shaft 42c fixed to the horizontal portion 42, and by releasing the tongue piece 43b from the insertion slit 42b, the fall prevention wall 43 becomes rotatable around the pivot shaft 42c, and by rotating and tilting it from a state extending vertically upward as shown in Figure 42(b), the second parent-child member 18 can be moved horizontally.

[0150] Furthermore, the fall prevention wall 43 can be rotated 180 degrees counterclockwise as shown by the arrow in Fig. 42(c) to extend vertically as shown in Fig. 42(c), and then moved downward along the elongated hole 43a relative to the rotation shaft 42 as shown by the arrow from that state, whereby the tongue 43b is inserted into the insertion slit 42b as shown in Fig. 42(c), thereby maintaining the vertical state of the fall prevention wall 43. As a result, when the second parent member 18 is placed on the horizontal portion 42 as shown in Figs. 43 and 44, the fall prevention wall 43 can reliably hold the second parent member 18.

[0151] (Scaffolding assembly procedure 6) Next, a suspended scaffolding assembly procedure 6 according to this embodiment will be described.

[0152] 45 is a plan view showing a suspended scaffolding assembling procedure 6 according to the second embodiment of the suspended scaffolding assembling method according to the present invention.

[0153] Suspended scaffolding assembly procedure 6 according to this embodiment is a process of attaching a second guide support 19 to the slide member 30 attached in scaffolding assembly procedure 3 and the second parent member 18 installed in scaffolding assembly procedure 5. In other words, suspended scaffolding assembly procedure 6 is a process of erecting the second guide support 19 on the second parent member 18 installed in scaffolding assembly procedure 5.

[0154] In the suspended scaffolding assembling procedure 6 according to this embodiment, two second guide pillars 19 are fixed to the second guide member 18 using the pillar fixing tool 16, which is the same fixing means as in the first embodiment.

[0155] (Scaffolding assembly procedure 7) Next, a seventh procedure for assembling the suspended scaffolding according to this embodiment will be described.

[0156] Figure 47 is a side view showing suspended scaffolding assembling procedure 7 according to a second embodiment of the suspended scaffolding assembling method of the present invention. Figures 48(a) and (b) are an enlarged side view and an enlarged front view showing a first step for fixing the second guide pole to the slide member of Figure 47. Figures 49(a) and (b) are an enlarged side view and an enlarged front view showing a second step for fixing the second guide pole to the slide member of Figure 47. Figures 50(a) and (b) are an enlarged side view and an enlarged front view showing a third step for fixing the second guide pole to the slide member of Figure 47.

[0157] The suspended scaffolding assembling procedure 7 according to this embodiment is a process of fixing the slide member 30 to the first guide support 15 and the second guide support 19 after sending the slide member 30 forward.

[0158] In the first step for fixing the first guide support 15 and the second guide support 19 to the slide member 30, as shown in Figures 48(a) and (b), the upper fixing pin 29a and the lower fixing pin 29b are removed from the first guide support 15, and then the index plunger 36 provided on the tip side of the slide member 30 is pulled to rotate the rotation stopper 37 by 90 degrees and store it in the insertion recess 22 of the first guide support 15.

[0159] Next, in the second step, as shown in Figures 49(a) and (b), the slide member 30 is sent forward, and the upper fixing pin 29a and the lower fixing pin 29b are inserted from the first guide support 15 into the guide holes 31b and 32b of the upper rod-shaped member 31 and the lower rod-shaped member 32, respectively, thereby fixing the slide member 30 to the first guide support 15.

[0160] Similarly, the second guide pillar 19 is fixed to the slide member 30 by inserting the upper fixing pin 29a and the lower fixing pin 29b from the second guide pillar 19 into the guide holes 31a and 32a of the upper rod-shaped member 31 and the lower rod-shaped member 32, respectively.

[0161] Furthermore, in the third sequence, as shown in Figures 50(a) and (b), the index plunger 36 provided on the tip side of the slide member 30 is pulled again to rotate the rotation stopper 37 by 90 degrees, thereby enabling the rotation stopper 37 to be engaged with the second guide support 19.

[0162] (Scaffolding assembly procedure 8) Next, a suspended scaffolding assembly procedure 8 according to this embodiment will be described.

[0163] FIG. 51 is a side view showing a suspended scaffolding assembling procedure 8 according to the second embodiment of the suspended scaffolding assembling method according to the present invention.

[0164] Suspended scaffolding assembly procedure 8 according to this embodiment is a process of rotating the fall prevention wall 43 of the temporary stand 40 clockwise to tilt it down, removing the upper fixing pin 29a and the lower fixing pin 29b of the second first guide support 15 from the tip in the assembly direction to release the fixed state with the guide member 30, and sending out the second guide support 19 to an arbitrary stroke. Note that the second guide support 19 is in a fixed state with respect to the guide member 30.

[0165] Here, to collapse the fall prevention wall 43 of the temporary placement table 40, as in the first embodiment, the fall prevention wall 43 is pulled upward along the long hole 43a attached to the pivot shaft 42c fixed to the horizontal portion 42, and the tongue piece 43b is removed from the insertion slit 42b, whereby the fall prevention wall 43 can be rotated clockwise around the pivot shaft 42c, and can be moved from a state extended vertically upward to a collapsed state as shown in Figure 51.

[0166] Seven guide holes 31a to 31g and seven guide holes 32a to 32g are formed in the upper rod-shaped member 31 and the lower rod-shaped member 32 of the guide member 30 along the length direction, as described in Fig. 35. The second guide pillar 19 is advanced at an arbitrary stroke, and the upper fixing pin 29a and the lower fixing pin 29b are inserted from the holding portion 20 of the first guide pillar 15 into the guide holes 31a to 31g, 32a to 32g of the slide member 30, respectively, whereby the position is fixed and the stroke is set as shown in Fig. 52.

[0167] The relationship between the guide holes 31a to 31g and 32a to 32g of the slide member 30 and the stroke for advancing the slide member 30 is the same as that explained in the first embodiment and FIG. 35, and therefore will not be explained again.

[0168] (Scaffolding assembly procedure 9) Next, a suspended scaffolding assembly procedure 9 according to this embodiment will be described.

[0169] FIG. 52 is a side view showing a suspended scaffolding assembling procedure 9 according to the second embodiment of the suspended scaffolding assembling method according to the present invention.

[0170] The suspended scaffolding assembly procedure 9 according to this embodiment is a process of removing the temporary stand 40 from the parent member 11C at the tip end in the assembly direction. This removed temporary stand 40 will be used when assembling the next new suspended scaffolding 5.

[0171] In scaffolding assembly procedure 9, the slide member 30 is fixed to the first guide support 15 by inserting the upper fixing pin 29a and the lower fixing pin 29b into the guide holes of the upper rod-shaped member 31 and the lower rod-shaped member 32, respectively.

[0172] In addition, to remove the temporary placement table 40 from the first parent member 11C located at the front in the assembly direction, first loosen the knob 44 as shown in Figure 41(c), then move the locking plate 41a horizontally to disengage the insertion groove 41b of the locking plate 41a from the fixing pin 11a of the first parent member 11C, and then pull the entire temporary placement table 40 upward from within the long groove of the first parent member 11C.

[0173] (Scaffolding assembly procedure 10) Next, a procedure 10 for assembling a suspended scaffold according to this embodiment will be described.

[0174] FIG. 53 is a side view showing a suspended scaffolding assembling procedure 10 according to the second embodiment of the suspended scaffolding assembling method according to the present invention.

[0175] The suspended scaffolding assembly procedure 10 according to this embodiment is a process of placing a plurality of support members 12 at regular intervals between the second support member 18 sent out by the suspended scaffolding assembly procedure 8 and the first support member 11C placed at the front, and placing a plurality of scaffolding boards 13 in a direction perpendicular to the support members 12.

[0176] In the suspended scaffolding assembly procedure 10, the slide member 30 is fixed to the first guide support 15 and the second guide support 19.

[0177] As in the first embodiment, the support member 12 has hooks on both ends, and these hooks are respectively hooked into grooves formed along the length of the second support member 18 and the first support member 11C arranged for the forefront, so that the support member 12 is bridged between the second support member 18 and the first support member 11C arranged for the forefront. Then, a plurality of scaffolding boards 13 are placed on the plurality of support members 12 so as to be spread out in a direction perpendicular to the support members 12.

[0178] Here, in the suspended scaffolding assembly procedure 10, when multiple support members 12 are arranged and multiple scaffolding boards 13 are placed in a direction perpendicular to the support members 12, the loads are applied to the slide member 30 and the single pipe 51 via the first guide support 15 and the second guide support 19. In this case, the slide member 30 has a truss structure as described above, providing high support strength, and the first guide support 15 and the second guide support 19 are connected by the single pipe 51, providing high mounting strength, so that it is possible to adequately support the multiple support members 12 and scaffolding boards 13, as well as workers working on the scaffolding boards 13.

[0179] (Scaffolding assembly procedure 11) Next, a procedure 11 for assembling the suspended scaffolding according to this embodiment will be described.

[0180] FIG. 54 is a side view showing a suspended scaffolding assembling procedure 11 according to the second embodiment of the suspended scaffolding assembling method according to the present invention.

[0181] The suspended scaffolding assembly procedure 11 according to this embodiment is a process of suspending and fixing the second support member 18 to the lower flange 2a via the cable 14.

[0182] As shown in Figure 54, when the second support member 18 is suspended and fixed to the lower flange 2a via the cable 14, the worker can perform the installation work on the new suspended scaffolding 5. The structure and operation of the suspension and fixation are the same as those in the first embodiment, and therefore the explanation thereof will be omitted.

[0183] (Scaffolding assembly procedure 12) Next, a procedure 12 for assembling the suspended scaffolding according to this embodiment will be described.

[0184] FIG. 55 is a side view showing a suspended scaffolding assembling procedure 12 according to the second embodiment of the suspended scaffolding assembling method according to the present invention.

[0185] The suspended scaffolding assembly procedure 12 according to this embodiment is a process of replacing the single pipe 51 connecting the first guide support 15 installed in the first parent member 11B with the first guide support 15 installed in the first parent member 11C so as to connect the first guide support 15 installed in the first parent member 11C with the second guide support 18 installed in the second parent member 18. In the suspended scaffolding assembly procedure 12, the guide member 30 is fixed to the first guide support 15 and the second guide support 19.

[0186] As shown in Figure 55, in scaffolding assembly procedure 12, the single-pipe pipe 51 connecting the first guide support 15 installed on the first parent member 11B and the first guide support 15 installed on the first parent member 11C is removed from the single-pipe clamp 50 of each first guide support 15.

[0187] Then, the first guide pillar 15 and the second guide pillar 18 are connected by fixing each end of the single pipe 51 with single pipe clamps 50 provided on the first guide pillar 15 installed on the first parent member 11C and the second guide pillar 19 installed on the second parent member 18.

[0188] (Scaffolding assembly procedure 13) Next, a procedure 13 for assembling the suspended scaffolding according to this embodiment will be described.

[0189] FIG. 56 is a side view showing a suspended scaffolding assembling procedure 13 according to the second embodiment of the suspended scaffolding assembling method according to the present invention.

[0190] The suspended scaffolding assembling procedure 13 according to this embodiment is a step of sending the slide member 30 forward and removing the first guide support 15 installed on the first guide member 11B.

[0191] That is, in the suspended scaffolding assembling procedure 13, the slide member 30 is sent forward in order to remove the first guide support 15 installed on the first guide member 11B.

[0192] In the first sequence for removing the first guide support 15 installed in the first guide member 11B, the guide member 30 is fixed to the first guide support 15 installed in the first guide member 11B, and the index plunger 36 provided on the rear end side of the slide member 30 is pulled to rotate the rotation stopper 37 90 degrees so that it can be stored in the insertion recess 22 of the first guide support 15.

[0193] Next, in the second sequence, the upper fixing pin 29a and the lower fixing pin 29b are removed from the first guide column 15 and the second guide column 19, and then the slide member 30 is advanced, causing the rotation stopper 37 provided on the rear end side of the slide member 30 to pass through the insertion recess 22 of the first guide column 15. In this case, the stroke for advancing the slide member 30 is set so as not to interfere with the removal of the first guide column 15 installed on the first guide column 11B.

[0194] Furthermore, in the third sequence, the index plunger 36 provided at the rear end of the slide member 30 is pulled again to rotate the rotation stopper 37 by 90 degrees, so that this rotation stopper 37 can be engaged with the holding portion 20 of the first guide support 15 installed on the first guide member 11C.

[0195] (Scaffolding assembly procedure 14) Next, the suspended scaffolding assembly procedure 14 according to this embodiment will be described.

[0196] FIG. 57 is a side view showing a suspended scaffolding assembling procedure 14 according to the second embodiment of the suspended scaffolding assembling method according to the present invention.

[0197] The suspended scaffolding assembly procedure 14 in this embodiment is a process of retracting the slide member 30 until the tip of the slide member 30 is positioned at the second guide support 19, and then replacing the upper fixing pin 29a and the lower fixing pin 29b from the second guide support 19 into the guide holes 31a and 32a of the slide member 30, respectively, to fix the slide member 30.

[0198] (Scaffolding assembly steps 15-18) The suspended scaffolding assembly procedure 15 according to this embodiment is a process of installing multiple temporary stands 40 at predetermined intervals along the length of the second support member 18, similar to the suspended scaffolding assembly procedure 3 according to this embodiment described above.

[0199] The suspended scaffolding assembly procedure 16 in this embodiment is a process of placing the second suspension members 18 that will constitute the new suspended scaffolding 5 to be assembled next on the multiple temporary stands 40 installed in the scaffolding assembly procedure 15, similar to the suspended scaffolding assembly procedure 4 in this embodiment described above.

[0200] The suspended scaffolding assembly procedure 17 in this embodiment is a process of attaching the first guide support 15 installed on the first parent member 11B removed in the suspended scaffolding assembly procedure 13 to the second parent member 18 installed in the suspended scaffolding assembly procedure 16 described above.

[0201] The suspended scaffolding assembly procedure 18 according to this embodiment is a process of sequentially repeating the suspended scaffolding assembly procedures 7 to 17 described above.

[0202] According to this embodiment, first guide supports 15 are erected on the first parent members 11B and 11C along the assembly direction, which is a predetermined direction, and then these first guide supports 15 are connected via single-tube pipes 51.Furthermore, the first guide support 15 erected on the first parent member 11C and the second guide support 19 erected on the second parent member 18 are sequentially connected via single-tube pipes 51, thereby increasing the attachment strength of the guide supports, including the first guide support 15 and the second guide support 19, to the parent members, including the first parent members 11B and 11C.

[0203] Furthermore, according to this embodiment, when attaching the second guide support 19 to the guide member 30, the guide member 30 is first retracted and then inserted into the insertion recess 22 of the second guide support 19. This eliminates the need to rotate the second guide support 19 relative to the guide member 30 as shown in Figure 19 as in the first embodiment, thereby improving operability.

[0204] [Another embodiment of the invention] Although various embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, modifications, and combinations can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, as well as within the scope of the invention and its equivalents as set forth in the claims.

[0205] For example, in each of the above embodiments, a new suspended scaffolding 5 is constructed sequentially from an existing suspended scaffolding 10 along the flange member 2 of a bridge 1 as a structure, but the present invention is not limited to this and can also be applied to structures such as elevated roads, railways, power plants, etc.

[0206] Furthermore, in each of the above embodiments, the flange member 2 is described as using an H-shaped steel, but the flange member 2 is not limited to an H-shaped steel, and an L-shaped steel may also be used. [Explanation of symbols]

[0207] 1 Bridges (structures) 2 Flange member 5 New suspended scaffolding 10 Existing suspended scaffolding 11A, 11B, 11C First parent member 12 Rolling parts 13 Scaffolding planks 14 Cable 14a Cable anchorage 14b Grip 15 First guide post 16 Post fixture 16a Hook part 16b Fastening bolt 17 Rod section 18 Second Parent Material 19 Second guide post 20 Holding part 21 Opening 22 Insertion recess 23 Opening and closing lid 23a Hinge part 24 Toggle Clamp 25 Guide roller 26 Guide pin 26a Operation section 27 Pin support 28 Fixing means 29a Upper fixing pin 29b Lower fixing pin 30 Slide member 31 Upper rod-shaped member 31a~31g Guide holes 32 Lower rod member 32a~32g Guide holes 33 Inclined member 34 Guide hole 35 Stopper 36 Index Plunger 37 Rotation stopper 40 Temporary Stand 41 Clamping member 41a Locking plate 41b Insertion groove 41c Fixing bolt 42 Horizontal part 42a Reinforcement 42b Insertion slit 42c Pivot shaft 43 Fall prevention wall 43a long hole 43b Tongue piece 44 Knob 50 Single pipe clamp 51 Single pipe

Claims

1. A suspended scaffolding assembly method in which suspended scaffolding is assembled sequentially along a predetermined direction on the underside of the underside of a structure, An existing suspended scaffold is suspended in advance below the structure via a cable, First guide posts are erected along the predetermined direction on a plurality of guide members installed at predetermined intervals on the existing suspended scaffolding, a slide member is provided on each of the first guide posts so as to be slidable in the predetermined direction; a plurality of temporary placement tables are installed at predetermined intervals in the longitudinal direction of a first parent member arranged at the forefront in the assembly direction among the plurality of parent members; A second guide member that constitutes the next suspended scaffolding to be assembled is placed on the plurality of temporary placement stands, and a second guide pillar is erected on the second guide member, The slide member is slidably mounted on the second guide support and can be fixed or released by a fixing means, and the second guide support and the second guide member are advanced by a predetermined distance by sliding the slide member in the predetermined direction in a fixed state; A plurality of roller members are arranged between the first and second roller members, and a plurality of scaffolding boards are placed in a direction perpendicular to the plurality of roller members; A suspended scaffolding assembly method characterized by sequentially constructing a new suspended scaffolding on the existing suspended scaffolding by fixing the second support member to the structure via a cable.

2. The suspended scaffolding assembly method according to claim 1, characterized in that two guide supports, including the first guide support and the second guide support, on which the slide member is slidably mounted, are connected in sequence by a single pipe.

3. An existing suspended scaffold that has been suspended in advance via cables below the structure; A first guide pillar is erected along a predetermined direction on a plurality of guide members installed at predetermined intervals on the existing suspended scaffolding; a slide member provided on each of the first guide posts so as to be slidable in the predetermined direction; A plurality of temporary placement stands detachably attached at predetermined intervals in the longitudinal direction of a first parent member arranged at the forefront in the assembly direction among the plurality of parent members; A second parent member that is placed on the temporary stand and constitutes the next suspended scaffolding to be assembled; a second guide support that is erected on the second guide member and is fixed or releasably provided to the slide member by a fixing means; a plurality of rollers disposed between the second guide support and the second guide member by sliding the slide member and the first guide member; A plurality of scaffolding boards placed in a direction perpendicular to the plurality of scaffolding members; a cable for fixing the second support member to the structure; A suspended scaffolding assembly device characterized by sequentially constructing new suspended scaffolding on the existing suspended scaffolding.

4. The suspended scaffolding assembly device described in claim 3, characterized in that the temporary placement stand has a horizontal section extending horizontally on which the second parent member is placed, and a fall prevention wall extending vertically upward from the horizontal section to prevent the second parent member from falling, and the fall prevention wall is rotatable relative to the horizontal section and is configured to be able to move the second parent member horizontally by tilting it from the vertically upward extending state.

5. The suspended scaffolding assembly device described in claim 3, characterized in that the slide member is made of parallel rod-shaped members spaced at regular intervals above and below, and inclined members are connected sequentially between these rod-shaped members along the length of the rod-shaped members to form a truss structure.

6. The suspended scaffolding assembly device described in claim 5, characterized in that the first guide pillar and the second guide pillar have holding portions that slidably hold the slide member, and the holding portions have an insertion recess into which the slide member is inserted from an opening with an open top, and an opening / closing lid that allows the insertion recess to be opened and closed, and by closing the opening / closing lid, the slide member inserted into the insertion recess is slidably held.

7. A suspended scaffolding assembly device as described in any one of claims 3 to 6, further comprising a single pipe connecting two guide supports including the first guide support and the second guide support on which the slide member is slidably mounted.

Images