Wire bridge installation method

Abstract

To provide a wire bridge installation method that can be easily implemented.SOLUTION: In a wire bridge installation method in which two main ropes are stretched at a predetermined interval, and a covering plate that is rectangular in top view is laid on the two main ropes so that the long direction of the covering plate is the width direction, the method includes a first process in which guide fittings extending in the short direction are fixed to both long direction sides of the underside of the covering plate, and fixing bolts are previously erected at predetermined intervals in the short direction of the covering plate on both long direction sides of the top side of the covering plate, and the covering plate is placed on the two main ropes so that the guide fittings of the covering plate rest on the main ropes; and a second process in which a connecting plate is spanned between the covering plate that has been just placed on the two main ropes and the covering plate that is next laid, and the two covering plates are connected to the connecting plate using the fixing bolts to connect them to each other, the above steps being repeatedly executed while appropriately moving the covering plate.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a method for installing a wire bridge. [Background technology]

[0002] Conventionally, a pedestrian bridge has been known in which a sill beam and a cross beam are placed on the underside of the lower flange of the main girder made of H-shaped steel, and diagonal members are placed to connect the ends of the sill beam and cross beam to the end of the main girder (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-72808 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned conventional technology, H-shaped steel beams are used for the main girders, and therefore the work of erecting the main girders on both revetments is large-scale.

[0005] The present invention has been made in view of the above circumstances, and has as its object to provide a method for installing a wire bridge that can be easily installed. [Means for solving the problem]

[0006] The first method is A wire bridge installation method in which two main ropes are stretched at a predetermined interval, and covering plates that are rectangular in top view are arranged on the two main ropes in the bridge length direction so that the longitudinal direction of the covering plates is the width direction, and adjacent covering plates are connected to each other by connecting plates, Guide fittings extending in the short direction are fixed in advance to both sides of the long direction of the lower surface of the covering plate, and fixing bolts for bolting the connecting plate are installed in advance at predetermined intervals in the short direction on both sides of the long direction of the upper surface, A first step of placing the covering plate on the two main ropes on a fixed work platform on one bank side so that the guide fittings of the covering plate are placed on the main ropes; A second step of connecting the connecting plate between the lining plate placed immediately before and the lining plate placed next, and connecting the two lining plates to the connecting plate using the fixing bolts to connect them to each other; are executed repeatedly in this order, Between the second step and the first step, a step of moving the connected covering plate to the opposite bank side on the two main ropes is carried out as appropriate. The wire bridge installation method is characterized by the above.

[0007] The second means is the first means, characterized in that the fixing bolts protrude from the underside of the covering plate, and the guide fittings are attached by bolting using the fixing bolts.

[0008] The third means is the second means, in which a support for inserting and attaching the handrail main pipe is set upright on the connecting plate in advance, The method is characterized in that, after the two covering plates are connected to each other by the connecting plate in the second step, the handrail main pipe is inserted into the support and attached.

[0009] The fourth means is the third means, characterized in that in the second step, the baseboard and handrail are attached between two adjacent handrail parent pipes in the bridge longitudinal direction by bolting.

[0010] The fifth means is the fourth means, The connecting plate has a notch formed in the middle of the connecting plate in the hanging direction for attaching a hook bolt that hoists and fixes the main rope, and the notch is configured so that the hook bolt can move in a direction perpendicular to the hanging direction, In the first step, the two covering plates are connected to each other by the connecting plate while forming a predetermined gap between them, and then the hook bolt is inserted into the gap and the main rope is lifted and temporarily secured. [Effects of the Invention]

[0011] According to the present invention, a wire bridge can be easily installed by performing the steps of placing covering plates on two wire ropes, connecting the covering plates to each other via connecting plates, and moving the covering plates. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 2 is a conceptual diagram of a wire bridge according to an embodiment. [Figure 2] FIG. 2 is an enlarged side view of a portion of the wire bridge. [Figure 3] FIG. 1 is a perspective view of a covering plate used. [Figure 4] FIG. 10 is a cross-sectional view showing the bolt mounting structure of the covering plate. [Figure 5] FIG. 1 is a perspective view showing the mounting structure of a lip channel steel to a lining plate. [Figure 6] FIG. 10 is a diagram showing the mounting structure of the lip channel steel and the fixed plate. [Figure 7] This is an underside view of the covering plate. [Figure 8] FIG. 10 is an oblique view of a connecting plate that connects the covering plates together. [Figure 9] FIG. 2 is a perspective view showing the lining plates connected by the connecting plates. [Figure 10] 10A and 10B are diagrams for explaining the function of the uplift fitting. [Figure 11] FIG. 10 is a front view of the handrail main pipe. [Figure 12] FIG. 10 is a top view showing the clamp and baseboard mounting plate attached to the handrail main pipe. [Figure 13] FIG. 10 is a top view showing the clamp and handrail mounting plate attached to the handrail main pipe. [Figure 14] FIG. 10 is a front view showing a handrail mounting plate attached to a handrail main pipe. [Figure 15] FIG. [Figure 16] FIG. [Figure 17] FIG. [Figure 18] FIG. [Figure 19] FIG. 10 is an oblique view of the wind-resistant cable mounting bracket. [Figure 20] FIG. 10 is a cross-sectional view showing the mounting structure of the wind-resistant cable mounting bracket. [Figure 21] This is an underside view of a covering plate with wind-resistant cable mounting brackets installed. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0014] Fig. 1 is a conceptual diagram of the wire bridge 100, and Fig. 2 is an enlarged front view of a portion of the wire bridge 100. The method for installing the wire bridge 100 will be briefly explained below with reference to Figs. 1, 2 and other drawings.

[0015] First, two parallel main ropes 1, 1 are stretched between the fixed parts of the abutments 2, 2.

[0016] Next, using one of the abutments 2 (an example of a fixed work platform) as a foothold, the first covering plate 10 (Fig. 3) is placed on the two main ropes 1, 1. At this time, each main rope 1 is placed in the grooves of the two lip channel steels 11 on the underside of the covering plate 10.

[0017] Once this first covering plate 10 is placed on the two main ropes 1, 1, the covering plate 10 is slid on the two main ropes 1, 1 and pushed out towards the abutment 2 on the opposite bank. In this case, the covering plate 10 may be pulled via ropes by a winch or other means installed on the opposite bank. The covering plate 10 may be moved on the two wire ropes 1, 1 at this stage, or may be moved after several covering plates 10 have been connected.

[0018] Next, the end of the second lining plate 10 is placed on the main ropes 1, 1. At this time, a predetermined gap is formed between the two lining plates 10, 10, and the upper surfaces of the two lining plates 10, 10 are made approximately flush.

[0019] In this state, a connecting plate 20 (Fig. 9) is hung between the two lining plates 10, 10, and the connecting plate 20 and the two lining plates 10, 10 are screwed together using bolts 12 protruding from the top surfaces of the two lining plates 10, 10. As a result, the two lining plates 10, 10 are connected via the connecting plate 20 (Fig. 10).

[0020] In addition, the nut 22 that is already threaded onto the threads of the hook bolt 21 that has been pre-installed on the connecting plate 20 is lightly tightened to lift the main rope 1 relative to both covering plates 10, 10, and temporarily secure the covering plate 10 so that it does not lift up from the main rope 1 (Figure 10).

[0021] Next, the handrail main pipe 30 (FIG. 11) is fitted and attached to the support post 23 that has been erected on the connecting plate 20 in advance.

[0022] Mounting plates 33, 34, 34 are attached to the handrail main pipe 30, and one end of each of the handrails 50a, 50b is attached to each of the two mounting plates 34 (FIG. 11).

[0023] Thereafter, the connected covering plates 10, 10 are slid on the two main ropes 1, 1 and pushed out towards the abutment 2 on the opposite bank. In this case, the covering plates 10, 10 may be pulled via ropes by a winch installed on the opposite bank. The movement of the covering plates 10 on the two wire ropes 1, 1 may be carried out at this stage, or may be carried out after several covering plates 10 have been connected.

[0024] Next, the end of the third covering plate 10 is placed on the main rope 1. Then, in the same manner as above, the second and third covering plates 10 are connected using the connecting plate 20, the main rope 1 is temporarily fastened using the hook bolts 21, and the handrail main pipe 30 is attached to the support 23. After that, a baseboard 40 (Fig. 13) is hung and attached between the mounting plate 33 of this handrail main pipe 30 and the mounting plate 33 of the previous handrail main pipe 30, and the other ends of the handrails 50a, 50b, one end of which is attached to the two mounting plates 34 of the previous handrail main pipe 30, are attached to the mounting plate 34 of this handrail main pipe 30.

[0025] Once these operations are completed, the three connected lining plates 10, 10, 10 are slid over the two main ropes 1, 1 and pushed out towards the abutment 2 on the opposite bank. In this case, the three lining plates 10, 10, 10 may be pulled via ropes by a winch or other means installed on the opposite bank. Thereafter, the operations of placing the lining plates 10, connecting the lining plates 10 together, temporarily fastening the main ropes 1 with hook bolts 21, attaching the handrail main pipe 30 to the support pillar 23, and attaching the baseboards 40 and handrails 50a, 50b are repeated until the first lining plate 10 is installed in the designated position on the abutment 2 on the opposite bank.

[0026] Finally, the nuts 22 of the connecting plates 20 are retightened and tightened firmly, and the nuts 22 (Figure 9) threaded onto the threads of the hook bolts 21 are tightly tightened to lift the main rope 1 up against both covering plates 10, 10, and secure the covering plate 10 so that it does not lift up from the main rope 1.

[0027] It is preferable to install the wind-resistant cable mounting brackets 60 (Fig. 18) when placing or connecting the covering plate 10, and install the wind-resistant cable 71 at the end of the entire work (Fig. 21).

[0028] Bridge parts (Main rope 1) The main rope 1 is a wire rope twisted with wires made of hard steel wire or piano wire. (Covering plate 10) FIG. 3 is a perspective view of the covering plate 10. FIG.

[0029] The lining plate 10 is not particularly limited, but a lightweight lining plate is used, and has a weight that can be carried by two adults (for example, about 50 to 60 kg).

[0030] This lining plate 10 is composed of parallel upper and lower plates 13 and 14, with a plurality of first reinforcing members (not shown) and a plurality of second reinforcing members 15 arranged between them. The upper and lower plates 13, 14, first reinforcing members, and second reinforcing members 15 are made of fiber-reinforced plastics (FRP). As a result, the lining plate 10 has weather resistance, heat resistance, chemical resistance, electrical insulation, radio wave transparency, heat insulation, and corrosion resistance. It can also be colored freely, is lightweight (with a low specific gravity), and has excellent strength. Furthermore, using tools such as a circular saw, it can be easily processed on site, and size adjustments can be made on site.

[0031] The upper plate 13 and the lower plate 14 are rectangular flat plates and form the upper and lower surfaces of the covering plate 10 .

[0032] In this embodiment, the dimensions of the upper plate 13 and the lower plate 14 are 2000 mm in length and 700 mm in width, which are the planar dimensions of the lining plate 10. The thickness of the lining plate 10 is 110 mm.

[0033] The dimension setting can be changed as appropriate. In particular, if the number of first reinforcing members used increases, the width dimension of the covering plate 10 may be changed.

[0034] The first reinforcing member is a columnar member, and its two opposing surfaces (upper and lower surfaces) are joined to the upper plate 13 and the lower plate 14, respectively, using a combination of adhesive and small rivets. Structural members such as square tubes (square pipes) and H-shaped members can be used as this first reinforcing member.

[0035] A plurality of first reinforcing members are arranged at predetermined intervals or at equal intervals in parallel with the longitudinal direction of the upper plate 13 and the lower plate 14. The intervals between the first reinforcing members do not necessarily have to be equal.

[0036] The second reinforcing material 15 is provided at the longitudinal side end of the covering plate 10.

[0037] The second reinforcing material 15 is a channel material with a U-shaped cross section, and is provided across the width of the covering plate 10.

[0038] The second reinforcing member 15 is arranged such that the back surface of the web is in contact with the plurality of first reinforcing members between the upper plate 13 and the lower plate 14 .

[0039] The second reinforcing member 15 is joined to the upper plate 13 and the lower plate 14 using a combination of adhesive and small rivets.

[0040] The second reinforcing material 15 may also be provided at the width direction side end of the covering plate 10.

[0041] Furthermore, although a channel material is used as the second reinforcing material 5 in the embodiment as described above, it may also be a structural material such as a square tube or H-shape.

[0042] The upper plate 13 of the lining plate 10 has three holes 16a, 16b, and 16c of the same shape formed at a predetermined interval along the width direction of the upper plate 13 at both longitudinal ends of the upper plate 13. The distance between the three holes 16a, 16b, and 16c at both longitudinal ends of the lining plate 10 is not particularly limited, but is set to be approximately 1500 mm, for example, so that a light truck can pass through. In addition, three holes (not shown) corresponding to the three holes 16a, 16b, and 16c are also formed in the lower plate 14.

[0043] From the holes 16a, 16c and the two corresponding holes in the lower plate 14, bolts 12 protrude vertically.

[0044] In this case, the bolt 12 is fixed by fastening the bolt 12 to the lower plate 14 and the fixing plate 18a (described later) with two nuts 17a and 17b, as shown in Fig. 4. Since the bolt 12 with the nut needs to be inserted into the inside of the covering plate 10 through the holes 16a and 16c, the diameters of the holes 16a and 16c are larger than the diameters of the corresponding two holes in the lower plate, and the bolt 12 is loosely fitted into the holes 16a and 16c. As a result of loosely fitting the bolt 12 into the holes 16a and 16c, the bolt 12 is prone to wobble. Therefore, in this embodiment, after the bolt 12 is fixed to the lower plate 14 with two nuts 17, a wobble prevention nut 17c is screwed onto the bolt 12 so that it fits into the holes 16a and 16c.

[0045] As shown in the bottom view of Figure 5, a lightweight lip channel steel 11 is fixed to the part of the bolt 12 that protrudes downward from the lower plate 14 via a fixing plate 18a as a guide fitting to prevent the main rope 1 from shifting sideways.

[0046] That is, as shown in Fig. 6, an angle iron 18b is welded to the lightweight lip channel steel 11, and a fixing plate 18a is welded to the angle iron 18b. The fixing plate 18a is made of steel. A bolt hole 18d into which the bolt 12 is inserted is formed in this fixing plate 18a. Then, the lightweight lip channel steel 11 is fixed to the lining plate 10 by screwing a nut 17a, via a washer, onto the bolt 12 inserted into the bolt hole 18d. Fig. 7 is a bottom view of the lining plate 10 to which the lightweight lip channel steel 11 is fixed.

[0047] Instead of the lightweight lip channel steel 11, a fabricated steel material may be used as the guide fitting.

[0048] The covering plates 10 configured as described above are fabricated in advance in a factory. At the construction site, a plurality of the covering plates 10 are arranged in parallel along the bridge length, with the length of the covering plates 10 aligned with the width of the wire bridge 100. (Connecting plate 20) FIG. 8 is a perspective view of the connecting plate 20. As shown in FIG.

[0049] The connecting plate 20 is made of steel and has a base portion 24 that is rectangular when viewed from above, and a rectangular protruding portion 25 that protrudes from the center of the base portion 24 in a direction perpendicular to the base portion 24. In other words, the connecting plate 20 is formed in a T-shape when viewed from above.

[0050] The base portion 24 is a portion that is bridged between adjacent covering plates 10, 10 (see FIG. 9), and has one bolt hole 24a formed on each side in the longitudinal direction.

[0051] The upper portions of the bolts 12 of the adjacent lining plates 10, 10 are passed through the two bolt holes 24a of this connecting plate 20, and nuts 22 are screwed onto the upper portions of the bolts 12 via washers. This connects the adjacent lining plates 10, 10 to each other at two locations across the width of the bridge via the connecting plate 20. In this connected state, a predetermined gap of about 10 mm is formed between the adjacent lining plates 10, 10.

[0052] A cylindrical support pillar 23 is erected in the longitudinal center of the base portion 24. A handrail main pipe 30, which will be described later, is inserted into this support pillar 23 and attached.

[0053] The protruding portion 25 is provided with a hook bolt 21 for uplifting the main rope 1.

[0054] A rectangular notch 25a is formed in the protruding portion 25 in the longitudinal direction thereof. The hook bolt 21 is attached to this notch 25a.

[0055] Hook bolt 21 is formed in a J-shape, with a thread cut on the straight portion side. The straight portion of hook bolt 21 is passed through notch 25a from below overhanging portion 25, and a nut 22 is screwed onto the thread protruding upward from overhanging portion 25 via a washer. Hook bolt 21 is movable in the longitudinal direction of notch 25a. This allows hook bolt 21 to take a position retracted from main rope 1 and a position where it can engage with main rope 1. When connecting plate 20 is attached, hook bolt 21 is placed in the retracted position, and when hook bolt 21 is hung on main rope 1, hook bolt 21 is moved from the retracted position to the engageable position and nut 22 is tightened.

[0056] This hook bolt 21 is placed in the gap between adjacent covering plates 10, 10, and lifts the main rope 1 as shown in Figure 10. This hook bolt 21 serves to prevent the covering plate 10 from lifting up from the main rope 1.

[0057] A covering plate 25b is attached vertically to the tip of the overhanging portion 25. When the covering plates 10, 10 are connected, the covering plate 25b, together with the overhanging portion 25, serves to cover the corners of the covering plates 10, 10. This prevents the corners of the covering plates 10, 10 from being exposed, ensuring the safety of work after the connecting plate 20 is installed. (Handrail main pipe 30) FIG. 11 is a front view of the handrail main pipe 30.

[0058] The handrail main pipe 30 has a cylindrical cross section and is made of steel. This handrail main pipe 30 is attached to the support post 23 by fitting it into the post from above. The handrail main pipe 30 may be fitted to the outside or inside of the support post 23.

[0059] Clamps 31, 32a, and 32b as shown in Figures 12 and 13 are attached to the handrail main pipe 30. Clamp 31 is attached to the lower section of the handrail main pipe 30, clamp 32a to the middle section of the handrail main pipe 30, and clamp 32b to the upper section of the handrail main pipe 30, all of which are attached by screw fastening.

[0060] A square mounting plate 33 is rotatably mounted on the clamp 31. The mounting plate 33 is attached to the clamp 31 so as to be rotatable around a central bolt 31a. A bolt hole 33b is formed near each of the four corners of the mounting plate 33. The bolt holes 33b are used to attach a baseboard 40.

[0061] Next, clamps 32a and 32b will be described. Note that clamps 32a and 32b have the same structure including mounting plate 34, except for the mounting positions, and therefore will be collectively referred to as clamp 32.

[0062] A rectangular mounting plate 34 is rotatably mounted on this clamp 32. The mounting plate 34 is attached to the clamp 32 so that it can rotate around a central bolt 32c. As shown in Figure 14, one elongated hole 34b is formed at each end of the mounting plate 34 in the longitudinal direction. The elongated hole 34b is used to attach the handrail 50 (a collective term for the handrails 50a and 50b) with a bolt and nut. (baseboard 40) FIG. 15 is a front view of the baseboard 40, and FIG. 16 is a side view of the baseboard 40.

[0063] The baseboard 40 is made of a wide channel steel. The baseboard 40 is placed between the mounting plates 33 of adjacent handrail main pipes 30. When placing the baseboard 40, the grooves should face outward.

[0064] Two long holes 40a are formed in each of both ends of the baseboard 40 in the longitudinal direction.

[0065] The baseboard 40 is attached by threading a nut 42 onto a bolt (not shown) that has been passed through the two bolt holes 33b of the mounting plate 33 and the two corresponding elongated holes 40a, via a washer. (Handrails 50a, 50b) FIG. 17 is a front view of the handrails 50a and 50b, and FIG. 18 is a side view of the handrails 50a and 50b.

[0066] Handrails 50a and 50b are provided as handrails 50 (a collective term for handrails 50a and 50b) on the wire bridge 100 of the embodiment. Handrail 50a is a handrail provided on the mounting plate 34 of clamp 32a, and handrail 50b is a handrail provided on the mounting plate 34 of clamp 32b. Note that handrails 50a and 50b have the same structure except for their mounting positions, so they will be described together using the collective term handrail 50.

[0067] The handrail 50 is made of narrow channel steel. The handrail 50 is hung between the mounting plates 34 of adjacent handrail main pipes 30. When hanging, the grooves should face outward.

[0068] A long hole 51 is formed at each end of the handrail 50 in the longitudinal direction.

[0069] The handrail 50 is attached by threading a nut 53 onto a bolt (not shown) that is passed through the long hole 34b of the mounting plate 34 and the corresponding long hole 51, with a washer interposed between them.

[0070] (Wind-resistant cable mounting bracket 60) Figure 19 is an oblique view of the wind-resistant cable mounting bracket 60, Figure 20 is a cross-sectional view showing the mounting structure of the wind-resistant cable mounting bracket 60, and Figure 21 is a top view of the covering plate 10 showing the mounted state of the wind-resistant cable mounting bracket 60.

[0071] The wind-resistant cable mounting bracket 60 comprises a fixed portion 62 with a U-shaped cross section and a protruding portion 63 that protrudes outward from the solid portion 61. The fixed portion 62 is made up of three flat steel pieces 62a, 62b, and 62c joined in a U-shape so that it can enclose the end of the covering plate 10. Bolt holes 64a and 64c are formed in the parallel flat steel pieces 62a and 62c, respectively.

[0072] The protruding portion 63 is made of flat steel and protrudes outward from the vertical middle of the flat steel 62b. The protruding portion 63 has two bolt holes 65a formed therein.

[0073] This wind-resistant cable mounting bracket 60 is attached to the covering plate 10 at two locations across the width of the bridge using cut bolts 66 passed through holes 16b in the upper plate 13 of the covering plate 10 and the corresponding holes in the lower plate 14.

[0074] The covering plate 10 to which the wind-resistant cable mounting bracket 60 is attached is the covering plate 10 placed at the center of the end length direction of the wire bridge 100. In anticipation of this, it is preferable to attach the wind-resistant cable mounting bracket 60 with bolts 66 and nuts 67 when the covering plate 10 is placed on the main rope 1. In this attachment, a gap washer 68 is interposed between the underside of the covering plate 10 and the flat steel 62c.

[0075] Furthermore, when attaching the wind-resistant cable mounting bracket 60 to two adjacent covering plates 10, 10, for example, a lightweight angle iron 69 is hung between the protruding portions 63, 63, and a bolt 72 is passed through one of the two bolt holes 65a of each protruding portion 63, and each protruding portion 63 and the lightweight angle iron 69 are bolted together.

[0076] Then, a shackle 70 is attached to the wind-resistant cable mounting bracket 60 attached to the covering plate 10 in this manner, using the other bolt hole 65a, and a wind-resistant cable 71 is attached to the shackle 70. (Effects of the embodiment) According to the above-described method for installing the wire bridge 100, the following effects can be obtained.

[0077] First, the lightweight components used allow for manual assembly, enabling rapid response to on-site conditions.

[0078] Secondly, all on-site assembly and installation work can be carried out safely since it can be carried out from the top surface of the covering plate 10.

[0079] Thirdly, the safety equipment (handrail main pipe 30, baseboard 40, handrail 50) can also be easily assembled in parallel with the laying of the covering plate 10.

[0080] Fourth, if sand is adhered to the upper surface of the covering plate 10, work can be carried out safely even in rainy weather. In addition, the safety of passersby can be ensured.

[0081] Fifth, the covering plate 10 can be placed manually and simply slid onto the main rope 1, eliminating the need for large-scale work.

[0082] Sixth, the structure of the connecting members allows for sequential pulling out and movement by installing a small winch or the like at the front, and depending on the environmental conditions, it can also be pulled out from both sides, which improves the efficiency of installation work. Also, while conventional methods often require manual assembly from one or both directions, using a small winch or the like not only improves work efficiency but also improves safety. Seventh, the wire bridge 100 of this embodiment can be constructed as a temporary passage facility, and is particularly useful as a facility that allows pedestrians, light trucks, motorcycles, bicycles, and the like to pass through safely.

[0083] <Variations> The above describes an embodiment of the present invention, but in the case of large spans, as a countermeasure against lateral sway, it is also possible to arrange four wire ropes and connect two of them across the width of the bridge (for a total width of, for example, 4m), and the same shaped components can be used for fixed connecting fittings, etc. [Explanation of symbols]

[0084] 1 Main Rope 2. Abutments 3 Covering plate 5 Second reinforcement 10 Covering plate 10, 10 Covering plates 10, 10 Covering plate 11 Lip channel steel 12 volts 13 Upper Plate 14 Lower plate 15 Second reinforcement 16a, 16b, 16c holes 17 Nut 18a Fixed plate 18b angle iron 18d bolt hole 19 Nut 20 Connecting plate 21 Uplift fittings 22 Nut 23 Pillar 24a Bolt hole 30 Handrail main pipe 31, 32a, 32b Clamps 31a Bolt 32c bolt 33, 34 Mounting plate 33b Bolt hole 34 Mounting plate 34b long hole 40 Baseboard 40a long hole 42 Nut 50a, 50b handrails 51 long hole 53 Nut 60 Metal fittings 60) Metal fittings 61 Solid part 62 Fixed part 62a, 62b, 62c flat steel 63 Overhang 64a, 64c bolt holes 65a Bolt hole 66 volts 67 Nut 68 Gap washer 70 O-bolt 71 Wind-resistant rope 100 Wire Bridge

Claims

1. A wire bridge installation method in which two main ropes are stretched at a predetermined interval, and covering plates that are rectangular in top view are arranged on the two main ropes in the bridge length direction so that the longitudinal direction of the covering plates is the width direction, and adjacent covering plates are connected to each other by connecting plates, Guide fittings extending in the short direction are fixed in advance to both sides of the long direction of the lower surface of the covering plate, and fixing bolts for bolting the connecting plate are installed in advance at predetermined intervals in the short direction on both sides of the long direction of the upper surface, a first step of placing the covering plate on the two main ropes on a fixed work platform on one bank side so that the guide fittings of the covering plate are placed on the main ropes; a second step of connecting the connecting plate between the lining plate placed immediately before and the lining plate placed next, and connecting the two lining plates to the connecting plate using the fixing bolts; are executed repeatedly in this order, Between the second step and the first step, a step of moving the connected covering plates to the opposite bank side on the two main ropes is carried out as appropriate. A method for installing a wire bridge.

2. A wire bridge installation method as described in claim 1, characterized in that the fixing bolt protrudes from the underside of the covering plate, and the guide fitting is attached by bolting using the fixing bolt.

3. A support post for inserting and attaching the handrail main pipe is installed in advance on the connecting plate, 2. A wire bridge installation method as described in claim 1, wherein, in the second step, after the two covering plates are connected to each other by the connecting plate, the handrail main pipe is inserted into the support and attached.

4. 4. The wire bridge installation method according to claim 3, wherein in the second step, a baseboard and a handrail are attached between two of the handrail parent pipes adjacent in the bridge longitudinal direction by bolting.

5. The connecting plate has a notch formed in the middle of the connecting plate in the hanging direction for attaching a hook bolt that hoists and fixes the main rope, and the notch is configured so that the hook bolt can move in a direction perpendicular to the hanging direction, 5. A wire bridge installation method as described in claim 4, characterized in that in the first step, the two covering plates are connected to each other by the connecting plate while forming a predetermined gap between the two covering plates, and then the hook bolt is inserted into the gap and the main rope is lifted and temporarily secured.

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