Curing device, temporary scaffold device and holder

Abstract

To provide a curing device and temporary scaffold device that can place rod materials on sides of a bridge girder to be easily installed in the bridge girder and can make maintenance work of the bridge girder easy, and to provide holders that can install the rod materials on the sides of the bridge girder.SOLUTION: A curing device of the present invention comprises rod materials 14 placed on sides of a bridge girder 10 along a longer direction of the bridge girder 10, a suspended scaffold 4 suspended from the bridge girder 10, and a curing sheet 20 covering a periphery of the bridge girder 10. The curing sheet 20 has a side sheet part 20b covering the side surface of the bridge girder 10, a roof sheet part 20c which extends from the top edge of the side sheet part 20b toward the bridge girder 10 side, of which tip is fixed to the rod material 14, and which covers an upper part of a scaffold body 40 of the suspended scaffold 4, and a plurality of upper sheet parts 20d extended between ties 30, 30 respectively to cover a top surface of the bridge girder 10 and fixed to the roof sheet part 20c.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a curing device, a temporary scaffolding device, and a holder. [Background technology]

[0002] Railway bridges are constructed of steel girders that span the land across rivers or depressions and on which sleepers that support the rails are installed. Although such railway bridges are treated with rust prevention and paint, the bridge girders will rust if exposed to rain and wind for many years. If the rust penetrates into the steel material that makes up the bridge girders, the bridge girders will become brittle and their load-bearing capacity will decrease, so bridge girder maintenance is required before this happens. In addition, if a railway bridge has been in use for many years, there is a risk that the bolts of the bridge girders will loosen due to vibrations caused by trains passing by, and if the bolts of the bridge girders are loose, maintenance is also required to retighten the bolts.

[0003] Conventionally, such bridge girder maintenance is performed on a suspended scaffold that is suspended from the bridge girder and installed below the bridge girder (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-12754 A Summary of the Invention [Problem to be solved by the invention]

[0005] Maintenance to remove rust from bridge girders involves blasting, which uses compressed air to hit the rust on the bridge girder surface with granular abrasives (ores, non-ferrous metals, etc.), and then applying anti-rust paint to the surface of the girder from which the rust has been removed.However, when blasting is performed, the abrasives turn into dust and fly into the air when they are blown onto the bridge girder with compressed air, so it is necessary to prevent the abrasives from flying away.

[0006] Therefore, when performing maintenance to remove rust from bridge girders, one possible approach would be to provide a protective sheet that is fixed to the suspended scaffolding and covers the periphery of the bridge girders, install a protective device that forms a work space inside the protective sheet, and then perform blasting and anti-rust treatment within the work space, thereby allowing maintenance of the bridge girders to be performed while preventing dust from scattering.

[0007] The curing sheet in this type of curing device is composed of a lower sheet section that is fixed to the scaffolding main body located below the bridge girder of the suspended scaffolding and covers the underside of the bridge girder, a side sheet section that is fixed to multiple pillars that rise in the fore-and-aft direction from each side end of the scaffolding main body of the suspended scaffolding and to cross members that are spanned between the pillars and cover the side of the bridge girder, a number of upper sheet sections that are each stretched between the sleepers and cover the top surface of the bridge girder, and a roof sheet section that extends from the upper ends of the side sheet sections toward the bridge girder and has its tip fixed to the end of each upper sheet, covering the scaffolding main body from above.

[0008] However, with this type of curing device, there is no mounting portion on the side of the bridge girder to which the tip of the roof sheet portion can be attached, so in order to fix the tip of the roof sheet portion to the upper sheet portion, it is necessary to hold the roof sheet portion in your hand and fix the ends of the multiple upper sheet portions one by one to the tip of the roof sheet portion.

[0009] Therefore, when maintaining the bridge girders, assembling the curing device takes time and effort, making bridge girder maintenance work very troublesome.

[0010] Furthermore, bridge girder maintenance work is carried out not only on the suspended scaffold but also above the bridge girder, and for maintenance of the upper side of the bridge girder, a bridge side walkway that is installed parallel to the bridge girder and serves as a passage for maintenance and inspection is used. Bridge side walkways are used as passageways for maintenance and inspection of bridge girders and tracks, and are generally installed only on one side of the bridge girder, and it is rare for bridge side walkways to be installed on both sides of the bridge girder. However, in the past, the working space during bridge girder maintenance work was limited, so in order to efficiently carry out bridge girder maintenance work, it is desirable to install a temporary scaffold on the other side of the bridge girder where workers can walk.

[0011] When setting up such temporary scaffolding, it is necessary to install multiple support beams on the sides of the bridge girder to support the scaffolding boards. However, because typical bridge girders do not have mounting points on the sides to which the support beams can be connected, it has been difficult to set up temporary scaffolding on the sides of the bridge girder.

[0012] Therefore, in the past, it was not possible to set up temporary scaffolding on the sides of the bridge girders, making it impossible to carry out bridge girder maintenance work efficiently.

[0013] Thus, in order to facilitate the installation of the protective equipment and temporary scaffolding, mounting sections are required on the sides of the bridge girders to which the tips of the roof sheet sections and the support beams can be attached.

[0014] Therefore, an object of the present invention is to provide a protective device and a temporary scaffolding device that are easy to install on bridge girders and facilitate bridge girder maintenance work, and to provide a holder that can install rod material on the side of the bridge girder, making it easy to install the protective device and the temporary scaffolding device. [Means for solving the problem]

[0015] In order to solve the above-mentioned problems, the curing device of the present invention is a curing device that is installed on a railway bridge having a bridge girder on which sleepers supporting rails are installed, and covers the periphery of the bridge girder to form a work space inside, and includes a rod material that is arranged on the side of the bridge girder along the longitudinal direction of the bridge girder, a scaffolding body that is suspended from the bridge girder and arranged at a position spaced downward from the lower end of the bridge girder, extends along the longitudinal direction of the bridge girder and has a width wider than the width of the bridge girder in the short direction as viewed from the longitudinal direction of the bridge girder, and a predetermined curing space that rises from the side end of the scaffolding body and extends along the extension direction of the scaffolding body. The scaffolding includes a plurality of supports arranged at a fixed interval, a cross member that is spanned between adjacent supports and faces the rod material, and a curing sheet that covers the periphery of the bridge girder, the curing sheet having side sheet parts fixed to the supports and cross members and covering the side surfaces of the bridge girder, a roof sheet part that extends from the upper end of the side sheet part toward the bridge girder side and has its tip fixed to the rod material and covers the upper part of the scaffolding body, and a plurality of upper sheet parts that are respectively stretched between the sleepers to cover the upper surface of the bridge girder and fixed to the roof sheet part. With this configuration, the ends of the plurality of upper sheet parts can be fixed to the roof sheet fixed to the rod material, so that the work of fixing the ends of the upper sheet parts to the roof sheet part is easy. Therefore, the labor required for assembling the curing device installed when maintaining the bridge girder can be reduced, and the assembly time of the curing device can be shortened.

[0016] In addition, in the curing device of the present invention, the tip of the roof sheet part of the curing sheet may be wound around and fixed to the rod material. With this configuration, since the tip of the roof sheet part is fixed in a wound state around the rod material, even if the roof sheet part is blown by the wind, the roof sheet part can be prevented from coming off the rod material. Therefore, the airtightness of the work space can be maintained.

[0017] The curing device of the present invention may also include a sheet attachment device that is detachably attached to each sleeper and capable of fixing the sleeper-side end of the upper sheet part. Normally, sleepers are not provided with a portion to which a sheet can be attached, so it is difficult to spread the upper sheet part that covers the top surface of the bridge girder between the sleepers, but with this configuration, the upper sheet part can be easily spread between the sleepers via the sheet attachment device.

[0018] The temporary scaffolding device of the present invention is a temporary scaffolding device installed on the side of a bridge girder of a railway bridge having a bridge girder on which sleepers supporting rails are installed, and is characterized by comprising: rod members arranged on the side of the bridge girder along the longitudinal direction of the bridge girder; a scaffolding body suspended from the bridge girder and arranged at a position spaced downward from the lower end of the bridge girder, extending along the longitudinal direction of the bridge girder and having a width wider than the width of the bridge girder in the short direction as viewed from the longitudinal direction of the bridge girder; a plurality of posts standing up from the side ends of the scaffolding body and arranged at predetermined intervals along the extension direction of the scaffolding body; a suspended scaffold having a cross member that is bridged between adjacent posts and faces the rod members; a plurality of support beams that are connected at each end to the cross member and rod members and arranged side by side at predetermined intervals along the longitudinal direction of the bridge girder; and a scaffolding plate that is bridged and placed on the support beams. According to this configuration, a temporary scaffold consisting of the rod members, the cross member, the support beam, and the scaffolding plate is installed on the side of the bridge girder. This allows workers to work on the scaffolding planks of the temporary scaffold when carrying out maintenance work on the upper part of the bridge girder, ensuring a large working space, and thus enabling bridge girder maintenance work to be carried out efficiently.

[0019] The holder of the present invention is a holder that is installed on the bridge girder of a railway bridge, attached to the end of a sleeper that supports the rail, and holds a rod material arranged on the side of the bridge girder along the longitudinal direction of the bridge girder, and is characterized by having a connecting part that can be detachably connected to the end of the sleeper, a clamp holding part that faces the end face of the end of the sleeper, and a clamp part that is provided on the clamp holding part and can hold the rod material. With this configuration, it is possible to install a rod material arranged on the side of the bridge girder along the longitudinal direction of the bridge girder. Since the rod material arranged in this way can be used to fix a curing sheet or to set up temporary scaffolding, attaching such a holder to the end of the sleeper makes it easier to install a curing device or to set up temporary scaffolding, making it easier to perform maintenance work on the bridge girder. Effect of the Invention

[0020] The curing device and the temporary scaffolding device of the present invention can be easily installed on the bridge girder by placing the rod material on the side of the bridge girder, and can also facilitate maintenance work on the bridge girder. Also, the holder of the present invention can install the rod material on the side of the bridge girder. [Brief description of the drawings]

[0021] [Figure 1] This is a view of the bridge girder from the longitudinal direction with the curing device installed. [Diagram 2] This is a view of the bridge girder with the curing device installed from the short side. [Diagram 3] FIG. 2 is an enlarged view of the end of a sleeper. [Figure 4] This shows the state in which the upper sheet portion is stretched between the sleepers as viewed from the axial direction of the sleepers. [Diagram 5] (A) is a front view of the holder attached to the end of a sleeper, (B) is a side view of the holder attached to the end of a sleeper, and (C) is a plan view of the holder attached to the end of a sleeper. [Figure 6] FIG. 2 is an enlarged plan view showing a bridge girder and a portion of the temporary scaffolding installed to the side of the bridge girder. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, a simplified work booth 1 of the present invention that can be used for the maintenance of railway bridges will be described with reference to the drawings. The same reference numerals used throughout the drawings indicate the same parts.

[0023] 1 and 2, a railway bridge comprises a bridge girder 10 as a girder member that spans land across a river or a depression, and a track 3 supported on the bridge girder 10. The track 3 comprises a number of sleepers 30 arranged at a predetermined interval on the upper surface of the bridge girder 10 along the longitudinal direction of the bridge girder 10, and a pair of rails 31, 31 installed on each sleeper 30 and extending along the longitudinal direction of the bridge girder 10. Note that the track 3 in this embodiment is a single track with only one pair of rails 31, 31 as shown in FIG. 1, but may be a double track with two pairs of rails 31, 31 for an up line and a down line.

[0024] 1, the bridge girder 10 includes a pair of left and right beam members 10a, 10a each including a pair of upper and lower flat flange portions 10a1, 10a2 and a web 10a3 connecting the centers of the upper flange portion 10a1 and the lower flange portion 10a2, and multiple braces 10b bridged between the beam members 10a, 10a. Note that the shape of the bridge girder 10 described above is merely an example, and it may be, for example, a box-shaped beam material.

[0025] The simple work booth 1 of this embodiment will be described taking as an example a case where it is used on a railway bridge where a bridge side walkway 11 is provided on the side of the bridge girder 10. The bridge side walkway 11 is equipped with a walkway floor 11a extending along the longitudinal direction of the bridge girder 10 and a parapet 11b rising from the side of the walkway floor 11a on the side opposite the track, and workers can safely move along the side of the bridge girder 10 by using the bridge side walkway 11. The simple work booth 1 may also be used for maintenance of a railway bridge where a bridge side walkway 11 is not provided.

[0026] When performing maintenance on the bridge girder 10 of such a railway bridge, a curing device 2 is installed on the bridge girder 10, which covers the periphery of the bridge girder 10 and forms a work space A on the inside where maintenance of the sides and underside of the bridge girder 10 is performed.

[0027] Below, a detailed description will be given of each component of the curing device 2. In the following description, unless otherwise specified, the longitudinal direction of the bridge girder 10 will be referred to as the front-rear direction, and the transverse direction of the bridge girder 10 will be referred to as the left-right direction.

[0028] As shown in Figures 1 to 6, the curing device 2 of this embodiment comprises rod materials 14 arranged in the front-to-rear direction via holders 13 on the left and right sides of the bridge girder 10, a scaffolding main body 40 suspended from the bridge girder 10 and arranged at a position spaced downward from the lower end of the bridge girder 10, extending in the front-to-rear direction and having a width wider than the left-to-right width of the bridge girder 10 when viewed from the front-to-rear direction, a plurality of pillars 41 standing up from each side end of the scaffolding main body 40 and arranged at predetermined intervals along the extension direction of the scaffolding main body 40, and cross members 42 each spanning between adjacent pillars 41 in the front-to-rear direction and facing the rod materials 14, and a curing sheet 20 covering the surroundings of the bridge girder 10.

[0029] This curing sheet 20 has a lower sheet portion 20a fixed to the upper surface of the scaffolding main body 40 and covering the underside of the bridge girder 10, a pair of left and right side sheet portions 20b, 20b extending upward from the left and right ends of the lower sheet portion 20a, respectively, and fixed to the supports 41 and cross members 42 to cover the sides of the bridge girder 10, a roof sheet portion 20c extending from the upper ends of each side sheet portion 20b toward the bridge girder 10 with its tip fixed to the rod material 14, respectively, to cover the upper part of the scaffolding main body 40, and a plurality of upper sheet portions 20d stretched between the sleepers 30, 30, respectively, to cover the upper surface of the bridge girder 10, and fixed to the roof sheet portion 20c. Although not shown, the curing sheet 20 also has a front sheet portion and a rear sheet portion covering the front and rear ends of the bridge girder 10.

[0030] In this way, by covering the periphery of the bridge girder 10 with the protective sheet 20, a work space A is formed inside the protective sheet 20. Therefore, a worker can perform maintenance on the side and underside of the bridge girder 10 from above the scaffolding body 40 of the suspended scaffolding 4 located within the work space A, and can prevent dust from leaking out of the work space A even if blasting work is performed during maintenance.

[0031] In addition, although not shown, a handrail rail is suspended between adjacent posts 41, 41 in the front-to-rear direction, below the cross member 42, and this handrail rail prevents the worker from falling from the scaffolding main body 40.

[0032] The suspended scaffolding 4 is suspended from the bridge girder 10 by attaching the suspension parts 44 provided at the upper ends of the multiple chains 43 attached to the scaffolding main body 40 to the lower flange parts 10a2 of the beam members 10a in the bridge girder 10. However, the suspended scaffolding 4 may be suspended from the bridge girder 10 by attaching the suspension parts 44 to a part other than the lower flange part 10a2 of the bridge girder 10, for example, the upper flange part 10a1.

[0033] Although not shown, mesh sheets are attached to the left and right pillars 41 arranged to sandwich the bridge girder 10, respectively, to cover the bridge girder 10 and the curing device 2 from the sides. In this case, in order to cover the side of the parapet 11b of the bridge side walk 11 with the mesh sheet as well, the upper end of the left side pillar 41 on the bridge side walk 11 side of the bridge girder 10 faces the upper end of the parapet 11b of the bridge side walk 11 in the horizontal direction. Therefore, in this embodiment, the left side pillar 41 on the bridge side walk 11 side is longer than the right side pillar 41, but the lengths of the left and right pillars 41 may be the same.

[0034] The above-mentioned configuration of the suspended scaffolding 4 is merely an example, and the present invention is not limited to the above-mentioned configuration.

[0035] The curing sheet 20 is, for example, a polyethylene sheet, and the lower sheet portion 20a, the side sheet portion 20b, the roof sheet portion 20c, and the upper sheet portion 20d constituting the curing sheet 20 are each a separate sheet that has been divided. The lower sheet portion 20a, the side sheet portion 20b, and the roof sheet portion 20c are each formed into a single sheet by fixing their ends to each other. However, the lower sheet portion 20a, the side sheet portion 20b, and the roof sheet portion 20c may be formed from a single sheet from the beginning. The material of the curing sheet 20 is merely an example, and is not particularly limited as long as it can prevent the passage of dust generated during maintenance of the bridge girder 10.

[0036] Next, a method for fixing each of the sheet portions 20a, 20b, 20c, and 20d of the protective sheet 20 will be described in detail.

[0037] The lower sheet portion 20a is fixed to the scaffolding body 40 with a tacker or tape while being covered on the upper surface of the scaffolding body 40, and the side sheet portion 20b is fixed by being heated and welded to the support 41 and the cross member 42 while being covered on the support 41 and the cross member 42. In addition, the left and right ends of the lower sheet portion 20a and the lower ends of the side sheet portions 20b are welded in a state where the ends are overlapped, so that no gap is generated between the lower sheet portion 20a and the side sheet portion 20b. In addition, if the scaffolding body 40 itself does not have a gap through which dust can pass between the inside and outside of the working space A, the protective sheet 20 does not need to be provided with the lower sheet portion 20a. In addition, in this embodiment, the lower sheet portion 20a and the side sheet portion 20b are fixed to the scaffolding body 40, the support 41, and the cross member 42 by welding, but they may be fixed by a method other than welding, for example, by tape. However, welding is preferred because it prevents gaps from occurring between the lower sheet portion 20a and the side sheet portion 20b, and it makes the lower sheet portion 20a and the side sheet portion 20b less likely to come off the scaffolding main body 40, the support pillars 41, and the cross members 42.

[0038] 1 and 3, the left and right roof sheet parts 20c have their base ends welded to the upper ends of the side sheet parts 20b, and their tips wrapped around rod materials 14 arranged in the front-to-rear direction via holders 13 (described later) on the left and right sides of the bridge girder 10, respectively, and welded to the roof sheet parts 20c themselves, thereby covering the upper surface of the scaffolding main body 40. Note that in Fig. 3, in order to make it easier to understand the configuration of the holder 13, illustration of support beams 15 and scaffolding boards 16 (described later) is omitted.

[0039] In this way, the tip of roof sheet portion 20c is fixed in a state where it is wrapped around rod material 14, so that even if roof sheet portion 20c is blown by wind, roof sheet portion 20c can be prevented from coming off rod material 14. However, if the mounting strength of roof sheet portion 20c to rod material 14 is sufficiently ensured, roof sheet portion 20c may be fixed without wrapping the tip of roof sheet portion 10c around rod material 14. Although the base end and tip of roof sheet portion 20c are fixed to rod material 14 and side sheet portion 20b by welding, respectively, they may be fixed by a method other than welding, for example, by tape.

[0040] Next, each upper sheet portion 20d stretched between the sleepers 30, 30 is stretched between adjacent sleepers 30 via a plurality of sheet mounting fixtures 12 that are detachably attached to each sleeper 30, as shown in Fig. 4. A plurality of sheet mounting fixtures 12 are provided along the axial direction of each sleeper 30.

[0041] Specifically, as shown in FIG. 4, the sheet mounting device 12 of this embodiment comprises a pair of holding pieces 12a, 12a that hold the sleeper 30 by sandwiching it in the front-to-rear direction, connecting fittings 12b consisting of bolts 12b1 and nuts 12b2 that connect the upper ends and lower ends of the pair of holding pieces 12a, 12a, respectively, and a fixing portion 12c that is provided at a portion of each holding piece 12a facing the sleeper 30 in the front-to-rear direction and is capable of sandwiching and fixing the upper sheet portion 20d.

[0042] As shown in Figure 4, the holding piece 12a has a holding piece main body 12a1 that is approximately U-shaped and clamps the upper and lower ends of the sleeper 30 from the front and rear directions, an upper connecting piece 12a2 that is flat, extends upward from the upper end of the holding piece main body 12a1 and has a hole (not shown), and a lower connecting piece 12a3 that is flat, extends downward from the lower end of the holding piece main body 12a1 and has a hole (not shown).

[0043] Then, with the sleeper 30 sandwiched between the pair of holding pieces 12a, 12a from the front-to-rear direction, the bolts 12b1 are inserted into the holes (not shown) of each upper connecting piece 12a2 that face each other in the front-to-rear direction and the holes (not shown) of each lower connecting piece 12a3 that face each other in the front-to-rear direction, and the sheet mounting device 12 is attached to the sleeper 30 by screwing the nuts 12b2 into the threaded portions of the bolts 12b1.

[0044] In addition, the fixing portion 12c includes a flat welded piece 12c1 welded to the portion of the holding piece main body 12a1 facing the sleeper 30 in the front-to-rear direction, an L-shaped piece 12c2 which stands from the upper end of the welded piece 12c1 toward the opposite side to the sleeper and has an upwardly extending tip to form a gap between the holding piece main body 12a1 and has an L-shaped cross-section and a through hole not shown in the figure, a nut 12c3 welded to the side of the sleeper 30 of the L-shaped piece 12c2 and faces the through hole, and a tightening bolt 12c4 screwed into the nut 12c3.

[0045] According to this configuration, when the fastening bolt 12c4 is rotated, the tip of the fastening bolt 12c4 moves toward or away from the sleeper 30. Therefore, by rotating the fastening bolt 12c4 in the fastening direction with the upper sheet portion 20d inserted between the tip of the fastening bolt 12c4 and the holding piece main body 12a1, the upper sheet portion 20d can be clamped and fixed between the fastening bolt 12c4 and the holding piece main body 12a1.

[0046] Therefore, as shown in Figure 4, by clamping and fixing both the front and rear ends of the upper sheet portion 20d between the holding piece main body 12a1 by the tightening bolts 12c4 of the sheet mounting fixtures 12 provided on each of the adjacent sleepers 30, 30, the upper sheet portion 20d is extended between the adjacent sleepers 30, 30, covering the upper surface of the bridge girder 10.

[0047] Normally, the sleepers 30 do not have any parts where the sheet can be fixed, so it is difficult to spread the upper sheet portion 20d covering the upper surface of the bridge girder 10 between the sleepers 30, 30; however, by attaching sheet mounting fixtures 12 to each sleeper 30 in this manner, which can fix the front and rear side ends, which are the sleeper 30 side ends, of the upper sheet portion 20d, the upper sheet portion 20d can be easily spread between the sleepers 30, 30, and the upper surface of the bridge girder 10 can be covered with the upper sheet portion 20d.

[0048] The above-mentioned configuration of the sheet mounting fixture 12 is one example, and the configuration of the sheet mounting fixture 12 is not particularly limited as long as it can be attached to the sleeper 30 and fix the sleeper 30 side end of the upper sheet portion 20d. Also, the upper sheet portion 20d may be fixed to the sleeper 30 by something other than the sheet mounting fixture 12, for example, a tape.

[0049] As shown in FIG. 3, the ends of the upper sheet portions 20d stretched between the sleepers 30, 30 are fixed to the upper surface of the roof sheet portion 20c fixed to the rod material 14 by welding.

[0050] In this manner, in this embodiment, the ends of the multiple upper sheet parts 20d can be fixed to the roof sheet part 20c that is already fixed to the rod material 14, which facilitates the task of fixing the ends of the upper sheet parts 20d to the roof sheet part 20c. This reduces the effort required to assemble the curing apparatus 2, and shortens the assembly time of the curing apparatus 2.

[0051] The method of fixing the end of the upper sheet portion 20d to the roof sheet portion 20c is not limited to welding, but may be by tape. Although not shown, the gap between the end face of the sleeper 30 and the rod material 14 is covered by a part of the upper sheet portion 20d protruding from between the sleepers 30.

[0052] Also, although not shown, at the front and rear ends of the bridge girder 10, the front sheet portion and the rear sheet portion are welded to the lower sheet portion 20a, the side sheet portion 20b, the roof sheet portion 20c, and the upper sheet portion 20d, respectively, and the front and rear ends of the curing sheet 20 are closed by the front sheet portion and the rear sheet portion.

[0053] In the curing device 2 configured in this manner, a work space A is formed inside the lower sheet portion 20a, the side sheet portion 20b, the roof sheet portion 20c, the upper sheet portion 20d, and the front sheet portion and rear sheet portion (not shown) of the curing sheet 20. Therefore, a worker can perform maintenance on the side and underside of the bridge girder 10 from the suspended scaffolding 4 located within the work space A, and can prevent dust from leaking out of the work space A even if blasting work is performed during maintenance.

[0054] Next, the holder 13 used to install the rod material 14 arranged on the side of the bridge girder 10 will be described in detail.

[0055] As shown in Fig. 5, the holder 13 of this embodiment includes a connecting portion 13a that can be detachably connected to the end of the sleeper 30, a clamp holding portion 13b that faces the end face of the end of the sleeper 30, and a clamp portion 13c that is provided on the clamp holding portion 13b and can hold the rod material 14. In Fig. 5, in order to make the structure of the holder 13 easier to understand, configurations other than the holder 13 that is attached to the sleeper 30 are not shown.

[0056] Specifically, the connecting portion 13a comprises a flat upper piece 13a1 extending in the front-to-rear direction along the top surface of the sleeper 30, a pair of side pieces 13a2, 13a2 extending downward from the front and rear ends of the upper piece 13a1 along the front and rear surfaces of the sleeper 30, respectively, with their lower ends protruding downward below the lower end of the sleeper 30, a pair of lower pieces 13a3, 13a3 extending horizontally from the lower ends of the pair of side pieces 13a2, 13a2 in a direction approaching each other and having a gap between their tips, nuts 13a4 welded to the side of the sleeper 30 of each lower piece 13a3 so as to face a through hole not shown in each lower piece 13a3, and a bolt 13a5 inserted into the through hole not shown in the figure and screwed into the nut 13a4 so that its tip faces toward the sleeper 30. Then, when each bolt 13a5 is screwed into the nut 13a4, the sleeper 30 is clamped between the upper piece 13a1 and the bolt 13a5, and the connecting portion 13a is connected to the sleeper 30.

[0057] Next, the clamp holding portion 13b includes a horizontal piece 13b1 extending horizontally along the upper surface of the sleeper 30 from the center of the upper piece 13a1 of the connecting portion 13a to one end in the axial direction of the sleeper 30 (the lower end in the center of FIG. 5(C)), and a vertical piece 13b2 extending vertically downward from the tip of the horizontal piece 13b1 along the end face of the sleeper 30 to near the center of the sleeper 30. Then, a clamp portion 13c capable of holding the rod material 14 is provided on the opposite side of the vertical piece 13b2 to the sleeper.

[0058] The holders 13 thus configured are attached to both the left and right ends of every few sleepers 30 among a plurality of sleepers 30 arranged in the extension direction of the bridge girder 10, as shown in Fig. 6. By attaching the rod material 14 to the clamp portion 13c of each holder 13 installed on the left side of the sleeper 30 in this manner, and also attaching the rod material 14 to the clamp portion 13c of each holder 13 installed on the right side of the sleeper 30, the rod material 14 is installed at intervals on both the left and right sides of the bridge girder 10. The holders 13 may be installed on all sleepers 30, or any sleeper 30 can be selected as long as it is capable of holding the rod material 14.

[0059] However, the above-mentioned configuration of the holder 13 is one example, and the configuration of the holder 13 is not particularly limited as long as the rod material 14 can be arranged in the front-to-rear direction on the side of the bridge girder 10. Also, in this embodiment, the holder 13 that holds the rod material 14 is attached to the sleeper 30, but the holder that holds the rod material 14 may be attached to a part other than the sleeper 30, for example, to the bridge girder 10.

[0060] Furthermore, in this embodiment, as shown in Figures 1 and 6, a plurality of support beams 15 are provided, each end of which is connected to the rod material 14 and cross material 42 on the right side in Figure 1 and arranged in a row at a predetermined interval along the fore-and-aft direction, and a scaffolding board 16 is placed across the support beams 15, thereby setting up a temporary scaffolding S on the right side of the bridge girder 10 in Figure 1.

[0061] In this way, the rod material 14 arranged on the side of the bridge girder 10 can be used not only for attaching the roof sheet portion 20c but also for setting up the temporary scaffolding S. Furthermore, when such a temporary scaffolding S is installed on the side of the bridge girder 10, workers can work not only on the bridge side walkway 11 but also on the temporary scaffolding S when performing maintenance work on the upper part of the bridge girder 10, so a large work space can be secured. Therefore, maintenance work on the bridge girder 10 can be performed efficiently.

[0062] In this embodiment, the support beam 15 is disposed below the rod material 14, but it may be disposed above the rod material 14.

[0063] In addition, in this embodiment, the roof sheet portion 20c of the curing sheet 20 is disposed between the support beam 15 and the scaffolding board 16, but it may be disposed on the scaffolding board 16. If the bridge side walkway 11 is sufficient for the movement space of the workers, the temporary scaffolding S does not need to be installed.

[0064] In addition, for railway bridges that do not have bridge side walkways 11, temporary scaffolding S of a similar structure to that described above can be installed on both the left and right sides of the bridge girder 10.

[0065] Although the rod material 14 in the present embodiment is cylindrical and made of a metal pipe material, the material and shape of the rod material 14 are not particularly limited as long as the necessary strength can be ensured. For example, the rod material 14 may be solid or rectangular.

[0066] As described above, the curing device 2 of this embodiment is installed on a railway bridge equipped with a bridge girder 10 on which sleepers 30 supporting rails 31 are installed, and covers the periphery of the bridge girder 10 to form a work space A inside. The curing device 2 comprises rod materials 14 arranged on the sides of the bridge girder 10 along the longitudinal direction of the bridge girder 10, a scaffolding main body 40 suspended from the bridge girder 10 and arranged at a position spaced downward from the lower end of the bridge girder 10, extending along the longitudinal direction of the bridge girder 10 and having a width wider than the width of the bridge girder 10 in the short direction as viewed from the longitudinal direction of the bridge girder 10, and a pair of rod materials 14 arranged at predetermined intervals along the extension direction of the scaffolding main body 40. The scaffolding 4 comprises a plurality of pillars 41 placed on the support structure 41 and a cross member 42 that is spanned between adjacent pillars 41, 41 and faces the rod material 14, and a protective sheet 20 that covers the surrounding area of ​​the bridge girder 10. The protective sheet 20 has a side sheet portion 20b that is fixed to the pillars 41 and the cross member 42 and covers the side of the bridge girder 10, a roof sheet portion 20c that extends from the upper end of the side sheet portion 20b toward the bridge girder 10 and has its tip fixed to the rod material 14, covering the upper part of the scaffolding main body 40, and a plurality of upper sheet portions 20d that are stretched between the sleepers 30, 30, covering the upper surface of the bridge girder 10, and are fixed to the roof sheet portion 20c.

[0067] With the curing apparatus 2 configured in this manner, the ends of the multiple upper sheet parts 20d can be fixed to the roof sheet part 20c that is fixed to the rod material 14, facilitating the work of fixing the ends of the upper sheet parts 20d to the roof sheet part 20c. This reduces the effort required to assemble the curing apparatus 2 that is installed when maintaining the bridge girder 10, and shortens the assembly time of the curing apparatus 2, making it easier to install it on the bridge girder 10 and facilitating maintenance work for the bridge girder 10.

[0068] In this embodiment, the protective sheet 20 is provided with a lower sheet portion 20a that is fixed to the upper surface of the scaffolding main body 40 and covers the underside of the bridge girder 10, but if the scaffolding main body 40 itself does not have any gaps that allow dust to pass through between the inside and outside of the work space A, the protective sheet 20 does not need to be provided with the lower sheet portion 20a.

[0069] Furthermore, in the curing apparatus 2 of this embodiment, the tip of the roof sheet portion 20c of the curing sheet 20 is fixed by being wrapped around the rod material 14. In the curing apparatus 2 configured in this manner, since the tip of the roof sheet portion 20c is fixed in a state of being wrapped around the rod material 14, even if the roof sheet portion 20c is blown by the wind, the roof sheet portion 20c can be prevented from coming off the rod material 14. This makes it possible to maintain the airtightness of the work space A. However, as long as the mounting strength of the roof sheet portion 20c to the rod material 14 is sufficiently ensured, the tip of the roof sheet portion 20c may be fixed without being wrapped around the rod material 14.

[0070] In addition, the curing device 2 of this embodiment is equipped with sheet mounting fixtures 12 that are detachably attached to each sleeper 30 and can fix the side ends of the upper sheet portions of the sleepers 30.

[0071] Normally, since the sleepers 30 are not provided with any portion to which the sheet can be fixed, it is difficult to spread the upper sheet portion 20d covering the upper surface of the bridge girder 10 between the sleepers 30, 30, but if the sheet mounting fixtures 12 capable of fixing the front and rear ends, which are the sleeper 30 side ends, of the upper sheet portion 20d are attached to each sleeper 30 in this way, the upper sheet portion 20d can be easily spread between the sleepers 30, 30. However, the upper sheet portion 20d may be fixed to the sleeper 30 by something other than the sheet mounting fixtures 12, for example by tape.

[0072] In addition, the curing device 2 of this embodiment is equipped with a plurality of support beams 15, each end of which is connected to the cross member 42 and the rod member 14 and arranged in a row at a predetermined interval along the longitudinal direction of the bridge girder 10, and a scaffolding board 16 that is placed across the support beams 15.

[0073] With the curing device 2 configured in this manner, the temporary scaffolding S can be easily set up by simply placing the scaffolding boards 16 across multiple support beams 15, each end of which is connected to rod materials 14 provided on the sides of the bridge girder 10 and to the cross members 42 of the suspended scaffolding 4.

[0074] Furthermore, when the temporary scaffolding S is installed on the side of the bridge girder 10 in this manner, workers can work on the scaffolding boards 16 of the temporary scaffolding S when performing maintenance work on the upper part of the bridge girder 10, so a large work space can be secured. Therefore, maintenance work on the bridge girder 10 can be performed efficiently. In addition, since the rod material 14 used to fasten the curing sheet 20 is also used to install the temporary scaffolding S, there is no need to provide new parts just for installing the temporary scaffolding S. However, if there is no need to install the temporary scaffolding S on the side of the bridge girder 10, the support beams 15 and the scaffolding boards 16 may be omitted.

[0075] In this embodiment, the curing device 2 is provided with a curing sheet 20 that covers the periphery of the bridge girder 10, but if the curing sheet 20 is not provided, the device becomes a temporary scaffolding device. Specifically, the temporary scaffolding device is installed on the side of the bridge girder 10 of a railway bridge that has the bridge girder 10 on which the sleepers 30 that support the rails 31 are installed, and includes rod materials 14 that are arranged on the side of the bridge girder 10 along the longitudinal direction of the bridge girder 10, and a scaffolding main body 40 that is suspended from the bridge girder 10 and arranged at a position spaced downward from the lower end of the bridge girder 10, extends along the longitudinal direction of the bridge girder 10, and has a width wider than the width of the bridge girder 10 in the lateral direction as viewed from the longitudinal direction of the bridge girder 10. The scaffolding 4 comprises a plurality of pillars 41 which rise from the side ends of the scaffolding main body 40 and are arranged at a predetermined interval along the extension direction of the scaffolding main body 40, a cross member 42 which is spanned between adjacent pillars 41, 41 and faces the rod material 14, a plurality of support beams 15 which have their respective ends connected to the cross member 42 and the rod material 14 and are arranged in a row at a predetermined interval along the longitudinal direction of the bridge girder 10, and a scaffolding board 16 which is spanned and placed on the support beams 15.

[0076] With the temporary scaffolding device configured in this manner, the temporary scaffolding S can be easily set up by simply placing the scaffolding boards 16 across multiple support beams 15, each end of which is connected to rod materials 14 provided on the sides of the bridge girder 10 and to the cross members 42 of the suspended scaffolding 4.

[0077] Furthermore, when the temporary scaffolding S is set up to the side of the bridge girder 10 in this way, workers can work on the scaffolding boards 16 of the temporary scaffolding S when performing maintenance work on the upper part of the bridge girder 10, ensuring a large work space. Therefore, maintenance work on the bridge girder 10 can be performed efficiently, making the maintenance work on the bridge girder 10 easier.

[0078] In addition, the holder 13 in this embodiment is installed on a bridge girder 10 of a railway bridge, attached to the end of a sleeper 30 that supports the rail 31, and holds a rod material 14 that is arranged along the longitudinal direction of the bridge girder 10 on the side of the bridge girder 10, and is equipped with a connecting portion 13a that can be detachably connected to the end of the sleeper 30, a clamp holding portion 13b that faces the end face of the end of the sleeper 30, and a clamp portion 13c that is provided on the clamp holding portion 13b and can hold the rod material 14.

[0079] The holder 13 configured in this manner makes it possible to install rod materials 14 arranged along the longitudinal direction of the bridge girder 10 on the side of the bridge girder 10. The rod materials 14 arranged in this manner can be used to fasten the curing sheet 20 and set up the temporary scaffolding S, so attaching such a holder 13 to the end of the sleeper 30 makes it easy to set up the curing device 2 and enables the installation of the temporary scaffolding S, making maintenance work on the bridge girder 10 easier.

[0080] Although the preferred embodiment of the present invention has been described in detail above, modifications, variations and changes can be made without departing from the scope of the appended claims. [Explanation of symbols]

[0081] Description of the Related Art 2 protection device, 4 suspended scaffolding, 10 girder, 12 sheet mounting fixture, 13 holder, 13a connecting part, 13b clamp holding part, 13c clamp part, 14 rod material, 15 support beam, 16 scaffolding board, 20 protection sheet, 20b side sheet part, 20c roof sheet part, 20d upper sheet part, 31 rail, 32 sleeper, 40 scaffolding body, 41 pillar, 42 horizontal member, A work space

Claims

1. A curing device that is installed on a railway bridge having a girder on which a sleeper supporting a rail is installed, and covers the periphery of the girder to form a work space inside, A rod material arranged on the side of the bridge girder along the longitudinal direction of the bridge girder; a scaffolding body suspended from the bridge girder, disposed at a position spaced downward from the lower end of the bridge girder, extending along the longitudinal direction of the bridge girder and having a width wider than the width of the bridge girder in the short direction as viewed from the longitudinal direction of the bridge girder; a plurality of posts standing up from the side ends of the scaffolding body and disposed at predetermined intervals along the extension direction of the scaffolding body; and a cross member bridged between adjacent posts and facing the rod member; A curing sheet covering the periphery of the bridge girder, The curing sheet has a side sheet portion fixed to the support and the cross member to cover the side surface of the bridge girder, a roof sheet portion extending from the upper end of the side sheet portion toward the bridge girder side and having a tip fixed to the rod material to cover the upper part of the scaffolding main body, and a plurality of upper sheet portions each stretched between the sleepers to cover the upper surface of the bridge girder and fixed to the roof sheet portion. A curing device characterized by the above.

2. The tip of the roof sheet portion of the curing sheet is wrapped around the rod material and fixed thereto. The curing apparatus according to claim 1 .

3. a sheet attachment tool that is detachably attached to each of the sleepers and that can fix the sleeper side end of the upper sheet part; The curing apparatus according to claim 1 .

4. A temporary scaffolding device that is installed on the side of a bridge girder on a railway bridge having a bridge girder on which a sleeper supporting a rail is installed, A rod material arranged on the side of the bridge girder along the longitudinal direction of the bridge girder; a scaffolding body suspended from the bridge girder, disposed at a position spaced downward from the lower end of the bridge girder, extending along the longitudinal direction of the bridge girder and having a width wider than the width of the bridge girder in the short direction as viewed from the longitudinal direction of the bridge girder; a plurality of posts standing up from the side ends of the scaffolding body and disposed at predetermined intervals along the extension direction of the scaffolding body; and a cross member bridged between adjacent posts and facing the rod member; A plurality of support beams each having an end connected to the cross member and the rod member and arranged at a predetermined interval along the longitudinal direction of the bridge girder; and a scaffolding board placed across the support beam. A temporary scaffolding device characterized by the above.

5. A holder for holding a rod material that is installed on a bridge girder of a railway bridge, attached to an end of a sleeper that supports a rail, and arranged on the side of the bridge girder along the longitudinal direction of the bridge girder, A connecting portion that is detachably connectable to the end portion of the sleeper; a clamp holding portion facing an end surface of the end portion of the sleeper; a clamp portion provided on the clamp holding portion and capable of holding the rod material; A holder characterized by:

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