Scaffolding structures, support fixtures

Abstract

To install a scaffold panel at a desired location even when a support point cannot be installed.SOLUTION: A scaffold structure of the present invention is a structure for a scaffold installed on an underside of an elevated structure, and includes a support material fixing tool, a scaffold support material, and a scaffold panel. The support material fixing tool includes a horizontal girder fixing section and a longitudinal beam fixing section. The scaffold support material includes a longitudinal beam, a suspension material attached to the longitudinal beam, and a panel receiving material suspended by the suspension material. The horizontal girder fixing tool of the support material fixing tool is fixed to a horizontal girder. The longitudinal beam fixing section of the support material fixing tool is fixed to the longitudinal beam. The scaffold panel is laid on the panel receiving material suspended by the suspension material.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a scaffolding structure (hereinafter referred to as "scaffolding structure") used for inspecting various bridges such as highway bridges and railway bridges. ) and and support fixing devices. [Background technology]

[0002] There are approximately 700,000 road bridges in Japan that are over 2 meters long, and as of March 2012, 16% of these bridges were constructed more than 50 years ago, increasing to 40% ten years later, raising concerns about rising maintenance costs and the occurrence of serious accidents due to deterioration. In light of this situation, the national and local governments are promoting a shift from reactive maintenance, which repairs damaged bridges, to preventive maintenance, which involves systematically repairing deteriorated bridges.

[0003] Due to the occurrence of serious accidents involving road structures in recent years, efforts to maintain and manage roads have become more serious, and the Road Act now requires that "close visual inspections be carried out once every five years" (hereinafter referred to as "mandatory visual inspection"). With the enforcement of the mandatory visual inspections under the Road Act, the need for inspections of road bridges has also increased significantly.

[0004] Under these circumstances, the present applicants have developed a scaffolding for use in inspecting elevated structures such as bridges and expressway bridges (Patent Document 1 and Non-Patent Document 1). This scaffolding serves as both a work scaffolding and an inspection scaffolding, and allows for close-up visual inspection of the bridge.

[0005] This scaffolding is set up by repeating the following steps (1) to (7). (1) The process of installing advance net equipment to prevent falls (2) The process of sending out and installing the panel support material with the temporary hanging material attached. (3) The process of connecting the panel support material while tensioning the temporary hanging material. (4) The process of transporting, laying, and connecting the scaffolding panels while fixing them to the panel support material. (5) After installing fall prevention wires on the installed scaffolding panels, attach support brackets to the existing girders and connect the support brackets to the panel support material. (6) After installing the support material for attaching the side panels on the existing girder, the temporary hanging material is removed, hanging material for the scaffolding is installed, and the frame material for the side panels is installed. (7) Step of installing the side panel on the side panel frame [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-205961 [Non-patent literature]

[0007] [Non-Patent Document 1] Nikkei Engineering Co., Ltd. Aluminum alloy permanent scaffolding "cusa (registered trademark)" introduction page (http: / / www.sne.co.jp / cusa / index.html) Summary of the Invention [Problem to be solved by the invention]

[0008] However, with conventional construction methods, when installing a panel support material, it was not possible to install a support point at the end of the panel support material's protrusion to support the panel support material, and there were cases where the scaffolding panel could not be installed in the desired position.

[0009] The present invention has been made in view of the above circumstances, and the problem to be solved is to provide a scaffolding structure that allows a scaffolding panel to be installed at a desired position even when a support point cannot be installed at the protruding end of a panel receiving material. influence The object of the present invention is to provide a support material fixing device. [Means for solving the problem]

[0010] [Scaffolding construction method] The scaffolding construction method in this application is a construction method for scaffolding to be installed under various bridges such as highway bridges and railway bridges (hereinafter these are collectively referred to as "elevated structures"), in which the trailing scaffolding support is lined up parallel or approximately parallel to the leading scaffolding support, the leading scaffolding support and the trailing scaffolding support are connected with a support swivel fitting, the trailing scaffolding support is rotated from the support swivel fitting part toward the leading scaffolding support to align it with the leading scaffolding support, the leading scaffolding support and the trailing scaffolding support that have been aligned are connected to form a scaffolding support row, multiple rows of the scaffolding support rows are formed at intervals in the width direction of the elevated structure, and scaffolding panels are laid on the trailing scaffolding support of adjacent scaffolding support rows among the multiple scaffolding support rows.

[0011] [Scaffolding structure] The scaffolding structure of the present invention is a scaffolding structure to be installed under an elevated structure, and comprises a support material fixing device, a scaffolding support material, and a scaffolding panel, the support material fixing device having a cross beam fixing portion and a vertical beam fixing portion, the scaffolding support material having a vertical beam, a hanger attached to the vertical beam, and a panel support material hung by the hanger, the cross beam fixing portion of the support material fixing device is fixed to the cross beam, the vertical beam fixing portion of the support material fixing device is fixed to the vertical beam, and the scaffolding panel is laid on the panel support material hung by the hanger.

[0012] [Scaffolding support material] Book In prayer The scaffolding support material is a scaffolding support material that supports the scaffolding panels of the scaffolding installed on the underside of an elevated structure, and comprises a vertical beam, a hanging member attached to the vertical beam, and a panel support material suspended from the hanging member, with the panel support material being connected to the vertical beam via the hanging member.

[0013] [Support swivel bracket] Book In prayerThe support swivel fitting is a support swivel fitting for swiveling the scaffolding support, and includes an upper fixing part fixed to the upper surface of a vertical beam of the scaffolding support, a lower fixing part fixed to the lower surface of the vertical beam, a connecting pin connecting the upper fixing part and the lower fixing part, and a sheath tube covering the outer periphery of the connecting pin. The upper fixing part includes an upper first plate fixed to one of the connected vertical beams and an upper second plate fixed to the other connected vertical beam, and the lower fixing part includes a lower first plate fixed to one of the connected vertical beams and a lower second plate fixed to the other connected vertical beam. The upper first plate, upper second plate, lower first plate, and lower second plate are provided with insertion holes through which the connecting pin can be inserted, and the sheath tube has a sheath tube through-hole therein through which the connecting pin can be inserted. The upper fixing part, lower fixing part, and sheath tube are pivotally supported by the insertion holes and the connecting pins inserted through the sheath tube through-holes.

[0014] [Support material fixture] The support material fixing device of the present invention is a support material fixing device for fixing the scaffolding support to a cross beam of an elevated structure, and comprises a vertical beam fixing portion fixed to the vertical beam of the scaffolding support and a cross beam fixing portion fixed to the cross beam. The vertical beam fixing portion comprises a steel vertical beam addressing portion applied to the upper surface of the vertical beam, and the cross beam fixing portion comprises a steel cross beam addressing portion applied to the web of the cross beam. By fixing the vertical beam addressing portion to the vertical beam and the cross beam addressing portion to the cross beam, the scaffolding support can be fixed to the cross beam. [Effects of the Invention]

[0015] Since the present invention is a construction method in which a leading scaffolding support that has been installed earlier and a trailing scaffolding support are connected using a support swivel fitting, it is possible to install a scaffolding panel at the desired position even if it is not possible to install a support point at the protruding end of the panel support material. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view showing an example of a scaffolding support material according to the present application. [Figure 2](a) is an explanatory diagram of the end face of the scaffolding support material shown in Figure 1, (b) is a detailed diagram of part IIb of (a), and (c) is an explanatory diagram of the scaffolding support material with a scaffolding panel attached. [Figure 3] 10(a) to 10(c) are explanatory diagrams of the procedure for moving the panel support member of the scaffolding support member in the present application from a lifted position to a directly below position. [Figure 4] (a) shows an example of a support swivel fitting for clockwise rotation, and (b) shows an example of a support swivel fitting for counterclockwise rotation. [Figure 5] (a) is a front view of the support swivel bracket shown in Figure 4(a), (b) is a left side view of (a), (c) is a plan view of (a), and (d) is a bottom view of (a). [Figure 6] (a) is an explanatory diagram of the installation state of the support swivel fitting shown in Figure 4(a), and (b) is an enlarged view of part VI in (a). [Figure 7] (a) is a front view of the support swivel bracket shown in Figure 4(b), (b) is a left side view of (a), (c) is a plan view of (a), and (d) is a bottom view of (a). [Figure 8] (a) is an explanatory diagram of the installation state of the support swivel fitting shown in Figure 4(b), and (b) is an enlarged view of part VIII in (a). [Figure 9] FIG. 2A is a perspective view showing an example of a support material fixing device, and FIG. 2B is an explanatory diagram of the support material fixing device of FIG. 2A in use. [Figure 10] (a) is a side view of the process of installing the advanced network equipment, and (b) is a plan view of (a). [Figure 11] (a) is a side view of the process of installing subsequent scaffolding supports, and (b) is a plan view of (a). [Figure 12] (a) is a side view of the process of sending out the leading net equipment, and (b) is a plan view of (a). [Figure 13] (a) is a side view of the process of rotating three scaffolding supports, and (b) is a plan view of (a). [Figure 14] (a) is a side view of the process of further rotating the three scaffolding supports, and (b) is a plan view of (a). [Figure 15] (a) is a side view of the process of rotating the remaining scaffolding support, and (b) is a plan view of (a). [Figure 16] (a) is a side view of the process of connecting a trailing scaffolding support and a leading scaffolding support that are arranged in a row, and (b) is a plan view of (a). [Figure 17] (a) is a side view of the process of laying scaffolding panels, and (b) is a plan view of (a). [Figure 18] (a) is a side view of the process of installing subsequent scaffolding supports, and (b) is a plan view of (a). [Figure 19] (a) is a side view of the process of sending out the leading net equipment, and (b) is a plan view of (a). [Figure 20] (a) is a side view of the process of rotating three scaffolding supports, and (b) is a plan view of (a). [Figure 21] (a) is a side view of the process of rotating the remaining scaffolding support, and (b) is a plan view of (a). [Figure 22] (a) is a side view of the process of connecting a trailing scaffolding support and a leading scaffolding support that are arranged in a row, and (b) is a plan view of (a). [Figure 23] (a) is a side view of the process of laying scaffolding panels, and (b) is a plan view of (a). [Figure 24] (a) is a side view of the process of installing subsequent scaffolding supports, and (b) is a plan view of (a). [Figure 25] (a) is a side view of the process of sending out the leading net equipment, and (b) is a plan view of (a). [Figure 26] (a) is a side view of the process of rotating three scaffolding supports, and (b) is a plan view of (a). [Figure 27] (a) is a side view of the process of rotating the remaining scaffolding support, and (b) is a plan view of (a). [Figure 28] (a) is a side view of the process of connecting a trailing scaffolding support and a leading scaffolding support that are arranged in a row, and (b) is a plan view of (a). [Figure 29] (a) is a side view of the process of laying scaffolding panels, and (b) is a plan view of (a). [Figure 30](a) is a side view of the process of fixing the vertical beam of the subsequent scaffolding support to the cross beam with a support fixing device, and (b) is a plan view of (a). DETAILED DESCRIPTION OF THE INVENTION

[0017] (Embodiment) An example of an embodiment of the present invention will be described with reference to the drawings. In prayer Scaffolding support 10, support swivel fitting 20, and The present invention An example of the support material fixing device 30 and the preceding net equipment 40 will be described, and then an example of the scaffolding construction method and the scaffolding structure of the present invention will be described.

[0018] [Scaffolding support material] Book In prayer An example of an embodiment of the scaffolding support material will be described with reference to the drawings. In prayer The scaffolding support member 10 is a member that supports a scaffolding panel A of a scaffold used for inspecting an elevated structure (a bridge in this embodiment). As an example, the scaffolding support member 10 shown in Figure 1 and Figures 2(a) to (c) includes a vertical beam 11, a hanger 12 attached to the vertical beam 11, and a panel support member 13 hung by the hanger 12.

[0019] The vertical beam 11 is a member that supports the panel support member 13. In this embodiment, an I-beam is used as the vertical beam 11. A mounting member 11a that is T-shaped in end view protrudes from the bottom surface side of the lower flange of the vertical beam 11, and a hanging member 12 is attached to the mounting member 11a.

[0020] The hanging member 12 is a member that connects the vertical beam 11 and the panel support member 13. The hanging member 12 shown in Fig. 1 has flat plate members 12a and 12b that are placed on both outer sides of the mounting member 11a. The flat plate members 12a and 12b are connected by fastening a plurality of bolts 12c.

[0021] The panel support material 13 is a member that supports the scaffolding panel A in cooperation with other adjacent panel support materials 13. The panel support material 13 can be made of, for example, aluminum. The panel support material 13 of this embodiment has a support portion 13a that supports the scaffolding panel A and a rising portion 13b that rises upward from near the center of the width of the support portion 13a. Two protrusions 13c and 13d are provided at a distance above and below on both sides of the rising portion 13b, against which a clamp 14 that holds down the upper surface of the scaffolding panel A abuts.

[0022] In this embodiment of the scaffolding support material 10, when the panel support material 13 is pulled up diagonally upward by the hanging members 12 (FIG. 3(a)), the predetermined bolts 12c of the hanging members 12 can be loosened to move the pulled-up panel support material 13 to directly below the vertical beam 11 (a position where the hanging members 12 are oriented vertically and both ends of the vertical beam 11 and the panel support material 13 are aligned) (FIG. 3(b)). The panel support material 13 that has moved to directly below the vertical beam 11 can be fixed in that position by tightening the predetermined bolts 12c of the hanging members 12 (FIG. 3(c)).

[0023] The embodiment described here is an example. In prayer The scaffolding support material can be modified, added to, omitted, etc. as appropriate within the scope that does not change the essence of the material.

[0024] [Support swivel bracket] Book In prayer An example of an embodiment of the support swivel fitting 20 will be described with reference to the drawings. In prayer The support swivel fitting 20 is a member for rotating the scaffolding support 10 when constructing the scaffolding. As an example, the support swivel fittings 20 shown in Figures 4(a), 5(a)(b), and 6(a)(b) are for clockwise rotation, which rotates the scaffolding support 10 to the right (right-handed rotation), and the support swivel fittings 20 shown in Figures 4(b), 7(a)(b), and 8(a)(b) are for counterclockwise rotation, which rotates the scaffolding support 10 to the left (left-handed rotation).

[0025] The support swivel fitting 20 shown in Figures 4(a), 5(a)(b) and 6(a)(b) comprises an upper fixing portion 21 fixed to the upper surface of the vertical beam 11, a lower fixing portion 22 fixed to the lower surface of the vertical beam 11, a connecting pin 23 connecting the upper fixing portion 21 and the lower fixing portion 22, and a sheath tube 24.

[0026] The upper fixing part 21 includes two plates. One plate (hereinafter referred to as the "upper first plate") 21a is a rectangular plate material having a mountain-shaped protrusion (hereinafter referred to as the "upper first protrusion") 21b at one corner. The upper first protrusion 21b has an insertion hole (hereinafter referred to as the "upper first insertion hole") 21c through which the connecting pin 23 is inserted.

[0027] On the upper surface of the upper first plate 21a, long plate materials (hereinafter referred to as "upper first long plate materials") 21d are provided protruding upward along the longitudinal direction of the upper first plate 21a, and on the lower surface, oval blocks (hereinafter referred to as "upper first plate blocks") 21e protruding downward are provided at intervals in the longitudinal direction of the upper first plate 21a. The upper first plate 21a and the upper first plate blocks 21e are provided with insertion holes (hereinafter referred to as "upper first bolt holes") 21f for inserting bolts used for fixing to the vertical beam 11.

[0028] The other plate (hereinafter referred to as the "upper second plate") 21g of the upper fixing part 21 is a rectangular plate material similar to the upper first plate 21a, and has a mountain-shaped protrusion (hereinafter referred to as the "upper second protrusion") 21h at one corner. The upper second protrusion 21h has an insertion hole (hereinafter referred to as the "upper second insertion hole") 21i through which the connecting pin 23 is inserted.

[0029] An upwardly extending long plate (hereinafter referred to as "upper second long plate") 21j is provided on the upper surface of the upper second plate 21g along the longitudinal direction of the upper second plate 21g. The upper second plate 21g is provided with insertion holes (hereinafter referred to as "upper second bolt holes") 21k for inserting bolts used for fixing to the longitudinal beam 11.

[0030] The lower fixing part 22 includes two plates. One plate (hereinafter referred to as the "lower first plate") 22a is a rectangular plate material having a mountain-shaped protrusion (hereinafter referred to as the "lower first protrusion") 22b at one corner. The lower first protrusion 22b is provided with an insertion hole (hereinafter referred to as the "lower first insertion hole") 22c through which the connecting pin 23 is inserted.

[0031] A downwardly protruding long plate member (hereinafter referred to as "lower first long plate member") 22d is provided on the underside of the lower first plate 22a along the longitudinal direction of the plate. The lower first plate 22a is provided with an insertion hole (hereinafter referred to as "lower first bolt hole") 22k for inserting a bolt used for fixing to the vertical beam 11.

[0032] The other plate (hereinafter referred to as the "lower second plate") 22g of the lower fixing part 22 is a rectangular plate material similar to the lower first plate 22a, and has a mountain-shaped protrusion (hereinafter referred to as the "lower second protrusion") 22h at one corner. The lower second protrusion 22h has an insertion hole (hereinafter referred to as the "lower second insertion hole") 22i through which the connecting pin 23 is inserted.

[0033] On the upper surface of the lower second plate 22g, long plate materials (hereinafter referred to as "lower second long plate materials") 22j protruding downward are provided along the longitudinal direction of the lower second plate 22g, and on the upper surface, oval blocks (hereinafter referred to as "lower second plate blocks") 22e protruding upward are provided at intervals in the longitudinal direction of the lower second plate 22g. The lower second plate 22g and the lower second plate blocks 22e are provided with insertion holes (hereinafter referred to as "lower second bolt holes") 22f for inserting bolts used for fixing to the vertical beam 11.

[0034] The upper first plate 21a is placed on top of the upper second plate 21g so that the upper first through-hole 21c communicates with the upper second through-hole 21i, and the lower first plate 22a is placed on top of the lower second plate 22g so that the lower first through-hole 22c communicates with the lower second through-hole 22i. A connecting pin 23 is inserted into the upper first through-hole 21c, the upper second through-hole 21i, the sheath tube through-hole 24a, the lower first through-hole 22c, and the lower second through-hole 22i, and a nut 23a is fastened to the portion of the connecting pin 23 that protrudes below the lower second through-hole 22i.

[0035] Note that the support material swivel fitting 20 for counterclockwise rotation shown in Figures 4(b), 7(a)(b), and 8(a)(b) has the same configuration as the support material swivel fitting 20 for clockwise rotation shown in Figures 4(a), 5(a)(b), and 6(a)(b), except that the positions of protrusions 21b, 21h, 22b, and 22h on each plate are different. To avoid repetitive explanation, the same components as those in the support material swivel fitting 20 for clockwise rotation are given the same reference numerals, and their explanation will be omitted.

[0036] [Support material fixture] An example of an embodiment of a support material fixing device 30 of the present invention will be described with reference to the drawings. The support material fixing device 30 of the present invention is a member used when fixing a scaffolding support 10 to a cross beam B. As an example, the support material fixing device 30 shown in Figures 9(a) and (b) has a vertical beam fixing portion 31 fixed to the vertical beam 11 and a cross beam fixing portion 32 fixed to the cross beam B.

[0037] The vertical beam fixing portion 31 includes a vertical beam contact portion 31a that is fitted to the upper surface of the vertical beam 11, an upright portion 31b that is erected on the upper surface of the vertical beam contact portion 31a, and a support portion 31c that is provided between the vertical beam contact portion 31a and the upright portion 31b. A vertically elongated vertical tie member 31d is connected to the inner surface of the upright portion 31b. The vertical tie member 31d is connected to the upright portion 31b with bolts and nuts. The vertical tie member 31d protrudes above the upper end of the upright portion 31b. In this embodiment, flat steel is used for the vertical beam contact portion 31a, the upright portion 31b, and the support portion 31c, and angle steel is used for the vertical tie member 31d. The vertical beam fixing portion 31 can also be constructed using materials other than flat steel and angle steel.

[0038] A cross beam fixing portion 32 is provided at the upper portion of the vertical tie member 31d, at a position higher than the upright portion 31b. As shown in FIG. 9(a), the cross beam fixing portion 32 includes a cross beam contact portion 32a that is contacted to the cross beam B, and a horizontal connecting member 32b that connects the cross beam contact portion 32a to the vertical tie member 31d. The vertical connecting member 31d and the cross beam contact portion 32a are connected to the horizontal connecting member 32b with bolts and nuts. In this embodiment, angle steel is used as the cross beam contact portion 32a, and channel steel is used as the horizontal connecting member 32b. The cross beam fixing portion 32 can also be constructed using materials other than angle steel and channel steel.

[0039] The support fixing device shown in Figure 9(a) can fix the scaffolding support 10 to the cross beam B by fixing the vertical beam attachment portion 31a, which is attached to the upper surface of the vertical beam 11, to the vertical beam 11 with a bolt and nut, and fixing the cross beam attachment portion 32a, which is attached to the web B1 of the cross beam B, to the cross beam B with a bolt and nut, as shown in Figure 9(b).

[0040] [Advanced network equipment] The scaffolding construction method of the present application uses a leading net system 40. The leading net system 40 shown in Figures 10(a)(b) to 30(a)(b) includes net support members 41 installed on each vertical beam 11, vertical net struts 42 provided at the end of the net support members 41, upper and lower horizontal struts 43 erected between each vertical net strut 42, and a leading net 44.

[0041] The net support material 41 installed on each vertical beam 11 is in the shape of a long vertical rod, and is supported at multiple points along the length by being pressed down from above by horizontal tie materials 45 connecting the vertical beams 11 in each row. The leading net 44 is fixed at its leading end to the lower horizontal support 43 and at its rear end to the front of the scaffolding panel A installed in the front section, and is configured so that by moving the net support material 41 forward, it spreads out beyond the scaffolding panel A installed in the front section. Note that the leading net equipment 40 described here is just one example, and other structures can also be used for the leading net equipment 40.

[0042] [Scaffolding construction method] Next, an example of a scaffolding construction method in the present application will be described by taking as an example the construction of a permanently installed scaffolding (hereinafter referred to as "permanent scaffolding") using the above-mentioned scaffolding supports 10, support swivel fittings 20, support fixing devices 30, and advance net equipment 40. As an example, the scaffolding construction method shown in Figures 10(a)(b) to 30(a)(b) is an example in which four rows of panel support members 13 are arranged at intervals in the width direction of the bridge, and three rows of scaffolding panels A are installed between these four rows of panel support members 13.

[0043] The scaffolding construction method of this embodiment is a construction method in which scaffolding is installed through the steps of a preceding net equipment installation process S1, a scaffolding support material installation process S2, a preceding net feeding process S3, a first rotation process S4, a second rotation process S5, a third and fourth rotation process S6, a connecting process S7, a panel laying process S8, a scaffolding support material installation process (secondary) S9, a preceding net feeding process (secondary) S10, a first and second rotation process (secondary) S11, a third and fourth rotation process (secondary) S12, a connecting process (secondary) S13, a panel laying process (secondary) S14, a scaffolding support material installation process (tertiary) S15, a preceding net feeding process (tertiary) S16, a first and second rotation process (tertiary) S17, a third and fourth rotation process S18, a connecting process (tertiary) S19, a panel laying process (tertiary) S20, and a crossbeam fixing process S21. For ease of explanation, the four rows of panel receiving members 13 will be referred to as the first row, second row, third row, and fourth row from top to bottom in each figure (b). Note that, to make the drawings easier to see, some parts of the configuration installed in the previous process are omitted from the illustrations in Figures 10(a)(b) to 30(a)(b).

[0044] 10(a) and 10(b), the preceding net equipment installation process S1 is a process of assembling the preceding net equipment 40 on the front side of the scaffolding panel A. In this process, net support materials 41 are installed on each longitudinal beam 11, and the net support materials 41 are held in place by horizontal tie materials 45, thereby installing the preceding net equipment 40 on the front side of the scaffolding panel A.

[0045] The scaffolding support installation step S2 is a step of installing a scaffolding support 10, as shown in FIGS. 11(a) and 11(b). In this step, a new scaffolding support 10 (hereinafter referred to as the "first trailing scaffolding support") 10B is connected to an existing scaffolding support (hereinafter referred to as the "leading scaffolding support") 10A using a support swivel fitting 20. Specifically, the first trailing scaffolding support 10B and the leading scaffolding support 10A are installed so that their longitudinal end faces are aligned and parallel or approximately parallel, and the ends of the two supports where their end faces are aligned are connected by the support swivel fitting 20. More specifically, the upper first plate 21a and the lower first plate 22a of the support swivel fitting 20 are fixed to the first trailing scaffolding support 10B, and the upper second plate 21g and the lower second plate 22g of the support swivel fitting 20 are fixed to the leading scaffolding support 10A. This process is carried out for each of the first to fourth rows.

[0046] 12(a) and 12(b), the preceding net sending-out step S3 is a step of sending out the preceding net equipment 40 installed in the preceding net equipment installation step S1 ahead to spread the preceding net 44. In this step, multiple net support members 41 supported by the vertical beams 11 of each preceding scaffolding support member 10A and connected by horizontal ties 45 are sent out, and the preceding net 44 is spread ahead of the scaffolding panel A laid on the preceding scaffolding support member 10A. A chain block (not shown) or the like can be used to send out the net support members 41.

[0047] As shown in Figures 13(a) and 13(b), the first rotation step S4 is a step of rotating three (the first, third, and fourth rows) of the four first following scaffolding supports 10B installed in the scaffolding support installation step S2 by 90 degrees forward. This step is performed in a state where the first following scaffolding supports 10B are suspended by a chain block D installed between a bracket C protruding from a cross beam B and the first following scaffolding supports 10B. After the first following scaffolding supports 10B are rotated 90 degrees forward, the bolts 12c of the suspension members 12 are loosened to position the panel support members 13 directly below the vertical beams 11, and in this state, the bolts 12c of the suspension members 12 are tightened (see Figures 3(a) to 3(c)).

[0048] 14(a) and 14(b), the second turning step S5 is a step of turning the first trailing scaffolding support 10B, which has been turned 90 degrees in the first turning step S4, by a further 90 degrees toward the front. In this step, the first trailing scaffolding support 10B is rotated to a position where one end side of the first trailing scaffolding support 10B faces the tip end of the leading scaffolding support 10A, so that the first trailing scaffolding support 10B is lined up in front of the leading scaffolding support 10A.

[0049] As shown in FIGS. 15(a) and 15(b), the third and fourth rotation steps S6 involve rotating one of the remaining first subsequent scaffolding supports 10B (the second row) of the four first subsequent scaffolding supports 10B installed in the scaffolding support installation step S2 by 90 degrees forward, and then rotating it another 90 degrees forward from that state. The first 90-degree rotation step (third rotation step) corresponds to the first rotation step S4 and can be performed using the same procedure as the first rotation step S4. The subsequent 90-degree rotation step (fourth rotation step) corresponds to the second rotation step S5 and can be performed using the same procedure as the second rotation step S5. Note that in this step as well, after the first 90-degree rotation, the bolts 12c of the hanging members 12 are loosened to position the panel support member 13 directly below the vertical beam 11, and the bolts 12c of the hanging members 12 are tightened in this state (see FIGS. 3(a) to 3(c)).

[0050] As shown in Figures 16(a) and 16(b), the connecting step S7 involves removing the support swivel fittings 20 connecting each first trailing scaffolding support 10B to each leading scaffolding support 10A, and then connecting each first trailing scaffolding support 10B to each leading scaffolding support 10A to form a scaffolding support row. In this step, the first trailing scaffolding supports 10B are lined up in a row ahead of the leading scaffolding support 10A, and the support swivel fittings 20 connecting the two are removed. The longitudinal beams 11 of each leading scaffolding support 10A are then connected to the longitudinal beams 11 of each first trailing scaffolding support 10B, and the panel support members 13 of each leading scaffolding support 10A are then connected to the panel support members 13 of each first trailing scaffolding support 10B. Splice plates, bolts, nuts, and the like can be used for the connection. Multiple scaffolding support rows are formed at intervals along the width of the bridge.

[0051] 17(a) and 17(b), the panel laying step S8 is a step of laying a predetermined number of scaffolding panels A on the panel receiving members 13 of the first subsequent scaffolding support member 10B of adjacent scaffolding support rows among the multiple scaffolding support rows formed in the connecting step S7. In this step, the scaffolding panels A are placed on the panel receiving members 13 of the first subsequent scaffolding support member 10B in order starting from the one closest to the leading scaffolding support member 10A, and the scaffolding panels A are held on the panel receiving members 13 by clamps 14. This step is performed in a state where the scaffolding panels A are suspended by brackets C protruding from the cross beams B and chain blocks D installed between them.

[0052] The scaffolding support installation step (secondary) S9 is a step of installing another scaffolding support (hereinafter referred to as "second subsequent scaffolding support") 10C on each first subsequent scaffolding support 10B installed ahead of each leading scaffolding support 10A, as shown in Figures 18(a) and 18(b). The scaffolding support used here is the same as that used in the scaffolding support installation step S2. This step can be carried out using the same procedure as the scaffolding support installation step S2.

[0053] 19(a)(b), the preceding net sending step (secondary) S10 is a step of sending the preceding net equipment 40 installed in the preceding net equipment installation step S1 to the destination. This step can be performed in the same procedure as the preceding net sending step S3.

[0054] As shown in Figures 20(a) and 20(b), the first and second rotation steps (secondary) S11 are steps in which three (first, third, and fourth rows) of the four second subsequent scaffolding supports 10C installed in the scaffolding support installation step (secondary) S9 are rotated 90 degrees forward, and then rotated another 90 degrees forward from that state. The first 90-degree rotation step corresponds to the first rotation step S4 and can be performed using the same procedure as the first rotation step S4. The subsequent 90-degree rotations correspond to the second rotation step S5 and can be performed using the same procedure as the second rotation step S5.

[0055] As shown in Figures 21(a) and 21(b), the third and fourth rotation steps (secondary) S12 are steps of rotating one of the remaining second subsequent scaffolding supports 10C (second row) of the four second subsequent scaffolding supports 10C installed in the scaffolding support installation step (secondary) S9 by 90 degrees forward, and then rotating it another 90 degrees forward from that state. The first 90-degree rotation step (third rotation step (secondary)) corresponds to the first rotation step S4 and can be performed using the same procedure as the first rotation step S4. The subsequent 90-degree rotation step (fourth rotation step (secondary)) corresponds to the second rotation step S5 and can be performed using the same procedure as the second rotation step S5.

[0056] 22(a)(b), the connecting step (secondary) S13 is a step of removing the support swivel fittings 20 that connect each first subsequent scaffolding support 10B to each second subsequent scaffolding support 10C, and then connecting each first subsequent scaffolding support 10B to each second subsequent scaffolding support 10C to form a scaffolding support row. This step corresponds to the connecting step S7 and can be carried out using the same procedure as the connecting step S7.

[0057] As shown in Figures 23(a) and 23(b), the panel laying step (secondary) S14 is a step of laying a predetermined number of scaffolding panels A on the panel receiving material 13 of the second subsequent scaffolding support material 10C of an adjacent scaffolding support row among the multiple scaffolding support rows formed in the connecting step (secondary) S13. This step corresponds to the panel laying step S8 and can be carried out using the same procedure as the panel laying step S8.

[0058] The scaffolding support installation step (third) S15 is a step of installing another scaffolding support (hereinafter referred to as the "third subsequent scaffolding support") 10D on the second subsequent scaffolding support 10C installed ahead of the first subsequent scaffolding support 10B, as shown in Figures 24(a) and 24(b). The scaffolding support used here is the same as that used in the scaffolding support installation step S2. This step can be carried out using the same procedure as the scaffolding support installation step S2.

[0059] The preceding net sending step (tertiary) S16 is a step of sending the preceding net equipment 40 installed in the preceding net equipment installation step S1 to the destination, as shown in Figures 25(a) and 25(b). This step can be performed in the same procedure as the preceding net sending step S3.

[0060] As shown in Figures 26(a) and 26(b), the first and second rotation steps (tertiary) S17 are steps of rotating three (first row, third row, and fourth row) of the four third subsequent scaffolding supports 10D installed in the scaffolding support installation step (tertiary) S15 by 90 degrees toward the front, and then rotating them another 90 degrees toward the front from that state. The first 90-degree rotation step corresponds to the first rotation step S4 and can be performed using the same procedure as the first rotation step S4. The subsequent 90-degree rotations correspond to the second rotation step S5 and can be performed using the same procedure as the second rotation step S5.

[0061] 27(a)(b), the third and fourth rotation steps S18 are steps of rotating one of the remaining third subsequent scaffolding supports 10D (second row) of the four third subsequent scaffolding supports 10D installed in the scaffolding support installation step (tertiary) S15 by 90 degrees forward, and then rotating it another 90 degrees forward from that state. The first 90-degree rotation step (third rotation step (tertiary)) corresponds to the first rotation step S4 and can be performed using the same procedure as the first rotation step S4. The subsequent 90-degree rotation step (fourth rotation step (tertiary)) corresponds to the second rotation step S5 and can be performed using the same procedure as the second rotation step S5.

[0062] 28(a)(b), the connecting step (third) S19 is a step of removing the support swivel fittings 20 that connect each third subsequent scaffolding support 10D to each second subsequent scaffolding support 10C, and then connecting each third subsequent scaffolding support 10D to each second subsequent scaffolding support 10C to form a scaffolding support row. This step corresponds to the connecting step S7, and can be carried out using the same procedure as the connecting step S7.

[0063] As shown in Figures 29(a) and 29(b), the panel laying step (tertiary) S20 is a step of laying a predetermined number of scaffolding panels A on the panel receiving material 13 of the third subsequent scaffolding support material 10D of an adjacent scaffolding support row among the multiple scaffolding support rows formed in the connecting step (tertiary) S19. This step corresponds to the panel laying step S8 and can be carried out using the same procedure as the panel laying step S8.

[0064] As shown in Figures 30(a) and 30(b), the cross beam fixing step S21 is a step of supporting each third subsequent scaffolding support 10D with a support material fixing device 30 fixed to the cross beam B. The support material fixing device 30 used here has a cross beam fixing portion 32 fixed to the cross beam B and a vertical beam fixing portion 31 fixed to the vertical beam 11. In this step, holes are drilled at predetermined positions on the cross beam B using a drilling machine, the cross beam fixing portion 32 is fixed to the web B1 of the cross beam B with a bolt, and the vertical beam fixing portion 31 is fixed to the vertical beam 11 with a bolt.

[0065] Although not shown in the drawings, in this embodiment, after the cross beam fixing step S21 is completed, a step of installing a fall prevention wire to prevent the scaffolding panel A from falling and a step of installing a sway prevention device to prevent sway are performed. Specifically, in the fall prevention wire installation step, a fall prevention wire is attached to the laid scaffolding panel A and the fall prevention wire is fixed to the lower flange of the cross beam B, thereby preventing the laid scaffolding panel A from falling. Furthermore, in the sway prevention device installation step, sway prevention devices are fixed to the web B1 of the cross beam B and the vertical beam 11 of the scaffolding support material to prevent sway.

[0066] In this embodiment, an example is given in which the installation work of scaffolding panel A has been completed for one section and the installation work for the second section is to be carried out, but at an actual site, the above steps are repeated for a specified number of sections, and scaffolding is installed over the entire specified area under the bridge.

[0067] The spacing between the main girders varies depending on the bridge on which the scaffolding is installed, and at some sites, gaps may occur between the main girders and the installed scaffolding. In this case, it is preferable to lay an end panel (not shown) on the panel support member 13 of the scaffolding support member 10 closest to the main girder and on the bottom flange of that main girder to prevent gaps from occurring between the main girder and the scaffolding.

[0068] For ease of explanation, in the above embodiment, the scaffolding supports 10 are distinguished as a leading scaffolding support 10A, a first trailing scaffolding support 10B, a second trailing scaffolding support 10C, and a third trailing scaffolding support 10D. This expression is used for convenience in indicating the relationship between two scaffolding supports. The terms leading scaffolding support and trailing scaffolding support are relative concepts. For example, the first trailing scaffolding support 10B is a trailing scaffolding support in relation to the leading scaffolding support 10A, but a leading scaffolding support in relation to the second trailing scaffolding support 10C. Similarly, the second trailing scaffolding support 10C is a trailing scaffolding support in relation to the first trailing scaffolding support 10B, but a leading scaffolding support in relation to the third trailing scaffolding support 10D.

[0069] [Scaffolding structure] Finally, an example of the scaffolding structure of the present invention will be described. The scaffolding completed through the above steps has a structure in which the cross beam fixing portion 32 of the support material fixing device 30 is fixed to the cross beam B, the vertical beam 11 is supported by the vertical beam fixing portion 31 of the support material fixing device 30, the panel support material 13 is suspended from the underside of the vertical beam 11 by the suspension material 12, and the scaffolding panel A is laid on the panel support material 13.

[0070] (Other embodiments) The scaffolding supports 10, support swivel fittings 20, and support fixing devices 30, as well as the scaffolding construction method and scaffolding structure described in the above embodiments are examples, and each invention can be modified, replaced, added, or omitted as appropriate within the scope of its gist. Furthermore, the number of rows of scaffolding supports 10 and the number of rows of scaffolding panels A in the above embodiments, and the number of scaffolding supports 10 and scaffolding panels A installed in one section are examples, and may be more or less than these.

[0071] In the above embodiment, an example is given of installing permanent scaffolding under an elevated structure, but the scaffolding construction method and the scaffolding structure of the present invention, as well as the scaffolding support 10, support swivel 20 and support fixing device 30 used therein, can also be used when installing temporary scaffolding. [Industrial Applicability]

[0072] The scaffolding structure of the present invention, and the scaffolding support 10, support swivel fitting 20 and support fixing device 30 used therein, can be used not only when installing scaffolding on existing elevated structures such as existing bridges, but also when installing scaffolding on newly constructed elevated structures such as new bridges. [Explanation of symbols]

[0073] 10 Scaffolding Support 10A Scaffolding Support Material (Leading Scaffolding Support Material) 10B Scaffolding support (first subsequent scaffolding support) 10C Scaffolding support (second subsequent scaffolding support) 10D Scaffolding Support (Third Subsequent Scaffolding Support) 11 Longitudinal beam 11a Mounting material 12 Hanging material 12a, 12b flat plate material 12c bolt 13 Panel support material 13a Receiving part 13b Rising section 13c, 13d protrusions 14 Clamp 20 Support swivel fitting 21 Upper fixed part 21a Upper first plate 21b Upper first protruding part 21c Upper first insertion hole 21d Upper first long board 21e Upper first plate block 21f Upper first bolt hole 21g Upper second plate 21h Upper second protrusion 21i Upper second insertion hole 21j Upper second long plate material 21k Upper second bolt hole 22 Lower fixing part 22a Lower first plate 22b Lower first protrusion 22c Lower first insertion hole 22d Lower first long plate material 22e Lower second plate block 22f Lower second bolt hole 22g Lower Second Plate 22h Lower second protrusion 22i Lower second insertion hole 22j Lower second long plate material 22k Lower first bolt hole 23 Connecting pin 23a Nut 24 Sheath tube 24a Sheath tube passage 30 Support material fixture 31 Longitudinal beam fixing part 31a Vertical beam joint 31b Standing section 31c Support part 31d Vertical tie 32 Cross beam fixed part 32a Cross beam joint 32b Horizontal connection material 40 Advanced Internet Equipment 41 Net support material 42 Vertical Net Support 43 Horizontal support 44 Leading Net 45 Horizontal tie A Scaffolding Panel B crossbeam B1 (crossbeam) web C-bracket D Chain Block

Claims

1. In the scaffolding structure installed under an elevated structure, A scaffolding structure is provided with a support fixture, a scaffolding support and a scaffolding panel. The support material fixing device includes a cross beam fixing portion and a longitudinal beam fixing portion, The scaffolding support member includes a vertical beam, a hanger attached to the vertical beam, and a panel support member hung by the hanger, The crossbeam fixing portion of the support material fixing device is fixed to the crossbeam, The longitudinal beam fixing portion of the support material fixing device is fixed to the longitudinal beam, The scaffolding panel is laid on the panel support material suspended by the suspension material. A scaffold structure characterized by:

2. 2. The scaffold structure of claim 1, One or more trailing scaffolding supports other than the leading scaffolding support member are connected to the leading scaffolding support member installed earlier so as to be in line with the leading scaffolding support member, Among the trailing scaffolding supports, the trailing scaffolding supports that have reached a position where they can be fixed to the cross beam of the elevated structure are fixed to the cross beam of the elevated structure with a steel support fixing device equipped with a cross beam fixing portion and a vertical beam fixing portion. A scaffold structure characterized by:

3. A support fixing device for fixing a scaffolding support member that supports a scaffolding panel of a scaffolding installed on the underside of an elevated structure to a cross beam of the elevated structure, The scaffolding support member includes a vertical beam, a hanging member attached to the vertical beam, and a panel support member hung from the hanging member, The panel support member is connected to the vertical beam via the hanging member, The support fixing device includes a longitudinal beam fixing portion fixed to a longitudinal beam of the scaffolding support and a horizontal beam fixing portion fixed to the horizontal beam, The longitudinal beam fixing portion includes a steel longitudinal beam fitting portion fitted to the upper surface of the longitudinal beam, The crossbeam fixing portion includes a steel crossbeam appurtenance portion that is applied to the web of the crossbeam, The scaffolding support can be fixed to the horizontal beam by fixing the vertical beam fitting portion to the vertical beam and fixing the horizontal beam fitting portion to the horizontal beam. A support material fixing device characterized by:

4. In the support material fixing device according to claim 3, The panel support is made of aluminum. A support material fixing device characterized by:

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