Damage prevention device of fastening type lining plate and lining plate with the device

Abstract

To provide a damage prevention device that prevents peeling or damage to the coating treatment on the upper surface of the lower lining plate when multiple lining plates are stacked for storage, etc., and prevents parts such as fastening fittings from falling during work such as hanging the lining plate or tightening the fastening fittings, and a lining plate equipped with the damage prevention device.SOLUTION: It is equipped with a fastening bolt 3 that penetrates the lower plate 2a of a lining plate 2, a fastening fitting 4 that is attached to the lower ends of the fastening bolts 3 and clamps a girder 1 that receives the lining plate 2 below the lower plate 2a, and a protective fitting 11 that is arranged between the lower plate 2a and the girder 1 and protects the fastening fitting 4. The protective fitting 11 is attached to the lower plate 2a and has a leg 12 that hangs down near the fastening fitting 4 and fastening bolt 3 to below the fastening fitting 4 and fastening bolt 3, and a bottom plate portion 13 formed at the lower end of the leg 12.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention is designed to ensure work safety by preventing peeling or damage to coatings applied to the upper surface of the lower lining plate due to lining plate fastening fittings attached to the lining plates when multiple lining plates are stacked for storage, transportation, etc., and by preventing parts such as the fastening fittings from falling during operations such as hanging the lining plates or tightening the fastening fittings. [Background technology]

[0002] During underground construction such as subway construction, temporary roads are constructed by laying covering plates on the ground surface to avoid interfering with aboveground traffic. In this case, the covering plates are laid on girders erected on the surface of the underground temporary gantry and are fixed to the girders with multiple covering plate fastening fittings.

[0003] Generally, the upper surface of each covering plate is coated to prevent slipping.

[0004] For example, Patent Document 1 discloses an invention of a fastening mechanism for a lining plate that fixes the lining plate to a girder, and a lining plate equipped with the fastening mechanism (see FIGS. 8(a) and (b)).

[0005] Specifically, it comprises a pipe member 20 that penetrates the underside 61 of the covering plate 60, a guide member 40 attached to the side of the pipe member 20 and whose tip protrudes into the space inside the pipe member 20, and a cylindrical main body 12 inserted into the pipe member 20.

[0006] It also includes a fastening fitting 10 attached to the lower end of the main body 12 and having a hanging portion 11 that hangs the covering plate 60 on the girder 70, and a fastening bolt 30 that penetrates downward through the main body 12 and screws into a nut 14 arranged at the lower end of the main body 12.

[0007] Furthermore, a guide groove 13 is provided on the side of the main body 12 to move the hanging portion 11 from a position where it does not interfere with the beam 70 (a position parallel to the beam 70) to a position where it hangs on the beam 70 (a position perpendicular to the beam 70) by tightening the fastening bolt 30.

[0008] In this case, by tightening the fastening bolt 30 and moving the guide member 40 relatively along the guide groove 13 in the direction of the continuation of the guide groove 13, the fastener 10 rotates while rising, and the hooking portion 11 of the fastener 10 moves from a position where it does not interfere with the girder 70 to a position where it hooks onto the girder 70. This allows the covering plate 60 to be fixed onto the girder 70.

[0009] Additionally, a protective member 65 is attached to the bottom surface of the covering plate 60, positioned near the fastening fitting 10 and having a length that positions it below the lower end position of the fastening fitting 10. This prevents the fastening fitting 10 from being pinched between the upper and lower covering plates 60, 60 and becoming deformed or damaged when multiple covering plates 60 are stacked for storage, transportation, or other purposes. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Publication No. 2024-31 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-19417 [Patent Document 3] Japanese Patent Application Laid-Open No. 2006-161549 [Patent Document 4] Patent No. 3366110 Summary of the Invention [Problem to be solved by the invention]

[0011] However, in the covering plate fastening mechanism and covering plate of Patent Document 1, the protective member that protects the fastening fittings is simply formed in an L-shape when viewed from above, so the coating on the upper surface of the stacked lower covering plate can peel off, and it is necessary to repair it again when reusing it.

[0012] In addition, there was a risk that parts such as fastening fittings could accidentally fall to the ground while hoisting the covering plates or tightening the fastening fittings, posing an issue with work safety.

[0013] The present invention has been made to solve the above problems, and aims to provide a damage prevention device for fastening-type lining plates, which prevents the coating on the upper surface of the lower lining plate from peeling off due to lining plate fastening fittings attached to the lining plates when multiple lining plates are stacked for storage, transportation, etc., and prevents parts such as the fastening fittings from falling during operations such as hanging the lining plates or tightening the fastening fittings, thereby ensuring work safety, and a lining plate equipped with said device. [Means for solving the problem]

[0014] The present invention is a fastening type lining plate fastening device comprising a fastening bolt that penetrates a lower plate that forms the lining plate, a fastening fitting attached to the lower end of the fastening bolt and clamping a girder that supports the lining plate below the lower plate, and a protective fitting arranged between the lower plate and the girder and protecting the fastening fitting, wherein the protective fitting is attached to the lower plate and has a leg portion that hangs down below the fastening fitting near the outside of the fastening fitting, and a bottom plate portion formed at the lower end of the leg.

[0015] The legs and bottom plate can be integrally formed by casting, or they can be formed by welding steel materials such as angle bars. They can also be detachably attached to the underside of an existing covering plate by welding or bolting.

[0016] By forming the bottom plate portion to extend below the fastening fittings, it is possible to prevent parts such as fastening fittings from falling during operations such as hanging the covering plate and tightening the fastening fittings, thereby ensuring work safety.

[0017] Furthermore, by attaching the protective fitting near the outside of the fastening fitting, it is possible to configure it so that it also serves as a rotation stopper that prevents the fastening fitting from rotating together with the fastening bolt. [Effects of the Invention]

[0018] In the present invention, a bottom plate portion is provided at the lower end of a protective fitting attached to the lower end of a covering plate in order to protect the fastening fittings that secure the covering plate to the girder material.This prevents the fastening fittings from peeling off the anti-slip coating on the upper surface of the lower covering plate when multiple covering plates are stacked for storage, transportation, etc.

[0019] Furthermore, the falling of parts such as the fastening fittings during work such as hanging the covering plate or tightening the fastening fittings can be prevented, thereby ensuring work safety.

[0020] Furthermore, the protective fitting can also serve as a rotation stopper that prevents the fastening fitting, which rotates together with the fastening bolt, from rotating, and the fastening fitting can be set in a predetermined position to securely fix the covering plate onto the girder material and then removed. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a diagram illustrating one embodiment of a damage prevention device for a fastening type lining plate and a lining plate equipped with the device, and is a partial perspective view of a corner portion of the lining plate. [Figure 2] 1 shows the damage prevention device for a fastening type lining plate and the main parts of a lining plate equipped with said device, where FIG. 1(a) is a bottom view of the lining plate corner and FIG. 1(b) is a vertical cross-sectional view of the lining plate corner. [Figure 3]FIG. 2 is a longitudinal cross-sectional view of a corner of a lining plate, illustrating the damage prevention device for a fastening type lining plate shown in FIG. 1 and the main parts of a lining plate equipped with said device. [Figure 4] This figure shows the fastening fittings of the damage prevention device for the fastening type covering plate shown in Figure 1, where Figure (a) is a plan view, Figure (b) is a bottom view, Figure (c) is a side view, and Figure (d) is a cross-sectional view along line I in Figure (a). [Figure 5] The protective fittings attached to the underside of each corner of the covering plate shown in Figure 1 to protect the fastening fittings are shown, with Figure (a) being a plan view and Figure (b) being a side view. [Figure 6] This is a bottom view of the end of the lining plate, illustrating a lining plate equipped with a damage prevention device for the fastening type lining plate shown in Figure 1. [Figure 7] 7A and 7B are enlarged views of a portion of the covering plate shown in FIG. 6, where FIG. 7A is an enlarged view of part B in FIG. 6 and FIG. 7B is an enlarged view of part C in FIG. [Figure 8] 1A and 1B are diagrams showing a conventional example of a fastening mechanism for a lining plate and a lining plate, in which FIG. 1A is a plan view of the lining plate and FIG. 1B is an enlarged longitudinal cross-sectional view of a part of the lining plate. DETAILED DESCRIPTION OF THE INVENTION

[0022] 1 to 7 show an embodiment of the fastening type lining plate damage prevention device of the present invention and a lining plate equipped with said device. In the figures, a plurality of lining plates 2 constituting a temporary road are laid between girders 1, 1 erected on the surface of an underground temporary framing platform.

[0023] In addition, bolt holes 2b are formed in each corner of a lower plate 2a that forms each lining plate 2, and fastening bolts 3 are inserted into each bolt hole 2b.

[0024] Furthermore, fastening fittings 4, lower coil springs 5 ​​and reaction force receiving plates 6 are respectively arranged on the underside of the lower plate 2a at each corner of the covering plate 2, the reaction force receiving plates 6 are fixed to the underside of the lower plate 2a by welding or the like, and the lower coil springs 5 ​​are arranged between the reaction force receiving plates 6 and the fastening fittings 4.

[0025] A guide collar 7 and an upper coil spring 8 are disposed above the lower plate 2a, and the upper coil spring 8 is disposed concentrically with the guide collar 7 within the guide collar 7.

[0026] The fastening bolt 3 passes continuously from the lower side to the upper side of the lower plate 2a through the fastening metal fitting 4, lower coil spring 5, reaction force receiving plate 6, guide collar 7, and upper coil spring 8. A clamping nut 9 and a locking nut 10 for the clamping nut 9 are threadedly engaged with the upper end of the fastening bolt 3.

[0027] The fastening fitting 4 is a fixing fitting that secures the covering plate 2 by clamping the edge of the upper flange 1a of the girder 1 to the underside of the lower plate 2a, and is formed in a substantially rectangular shape in plan view.

[0028] In addition, a rotation fulcrum portion 4a that engages with the groove portion 6a of the reaction force receiving plate 6 is formed on one end side of the fastening fitting 4 in the long side direction, and a bolt through hole 4b through which the fastening bolt 3 passes is formed near the rotation fulcrum portion 4a.

[0029] The bolt through-hole 4b is formed with an inner diameter (loose hole) that is slightly larger than the outer diameter of the bolt shank 3b of the fastening bolt 3. This allows the tip side of the fastening fitting 4 to move freely up and down around the bolt shank 3b as an axis.

[0030] In addition, a pair of rotation stoppers 4c, 4c that prevent free rotation of the fastening bolt 3 are vertically provided on both ends of the fastening fitting 4 in the short side direction. In addition, the rotation fulcrum 4a is formed in a roughly L-shape in side view, rising at a nearly right angle toward the lower plate 2a (directly above), and the upper end of the rotation fulcrum 4a is formed in a roughly arc-shaped cross section so that it can rotate within the recessed groove 6a of the reaction force receiving plate 6.

[0031] Furthermore, the rotation stoppers 4c, 4c are formed in a rib shape on both sides of the bolt through-hole 4b so as to sandwich the bolt head 3a of the fastening bolt 3. This allows the fastening fitting 4 to rotate freely around the axis of the fastening bolt 3 together with the fastening bolt 3.

[0032] The lower coil spring 5 and upper coil spring 8 are both compression springs, and the lower coil spring 5 is located between the lower plate 2a and the fastening fitting 4 and acts to constantly press down on the fastening fitting 4. The upper coil spring 8 is located between the lower plate 2a and the clamping nut 9 and acts together with the fastening bolt 3 to pull the fastening fitting 4 towards the lower plate 2a.

[0033] The guide collar 7 is located between the lower plate 2a and the clamping nut 9 and serves to hold the fastening bolt 3 vertically within the through-hole 2b of the lower plate 2a.

[0034] In this configuration, when the fastening fitting 4 is directed perpendicularly toward the girder 1 and its tip end is positioned below the upper flange 1a of the girder 1, and the clamping nut 9 is tightened (the clamping nut 9 is turned around the right axis of the fastening bolt 3), the fastening fitting 4 rises together with the fastening bolt 3, and the edge of the upper flange 1a of the girder 1 is clamped between the tip end of the fastening fitting 4 and the lower plate 2a of the covering plate 2, thereby fixing the covering plate 2 onto the girder 1 (see Figures 2(a) and (b)).

[0035] Note that Figure 2(a) is a bottom view of the covering plate, so on the drawing, "around the left axis" becomes "around the right axis" and "around the right axis" becomes "around the left axis."

[0036] In this case, when the clamping nut 9 is tightened, the tip side of the fastening fitting 4 rotates upward around the rotation fulcrum portion 4a, tightly clamping the edge of the upper flange 1a, and the covering plate 2 is firmly fixed onto the girder material 1.

[0037] Furthermore, when the clamping nut 9 is loosened (the clamping nut 9 is turned around the left axis of the fastening bolt 3), the tip side of the fastening fitting 4 rotates downward around the rotation fulcrum portion 4a due to the elastic force of the compression coil spring 5, thereby releasing the clamping of the upper flange 1a between the lower plate 2a of the covering plate 2 and the tip side of the fastening fitting 4 (see Figure 3).

[0038] Furthermore, when the clamping of the upper flange 1a by the lower plate 2a of the covering plate 2 and the tip side of the fastening fitting 4 is released and the fastening bolt 3 is pushed downward, the rotation fulcrum part 4a of the fastening fitting 4 comes out of the recessed groove part 6a of the reaction force receiving plate 6, and when the fastening bolt 3 is turned around the bolt's left axis in this state, the fastening fitting 4 rotates together with the fastening bolt 3, and the tip side of the fastening fitting 4 comes out from under the lower plate 2a. This allows the covering plate 2 to be removed from above the girder 1.

[0039] Furthermore, by rotating the fastening bolt 3 around the right bolt axis or the left bolt axis when the rotation fulcrum portion 4a of the fastening fitting 4 is disengaged from the groove portion 6a of the reaction force receiving plate 6, the tip side portion of the fastening fitting 4 can be positioned below the upper flange 1a of the girder 1, or removed from the underside of the upper flange 1a of the girder 1, and the orientation of the fastening fitting 4 can be freely changed to a direction perpendicular to the girder 1 or a direction parallel to the girder 1.

[0040] In addition, fastening fitting protection fittings (hereinafter referred to as "protective fittings") 11 are attached to the underside of the lower panel 2a at each corner of the lower panel 2a to prevent the fastening fittings 4 from being deformed or damaged between the upper and lower covering plates 2, 2 when multiple covering plates 2 are stacked for purposes such as storage or transportation.

[0041] The protective fitting 11 is attached to the underside of the lower plate 2a and has a leg portion 12 that hangs down below the lower end of the fastening bolt 3 and fastening fitting 4 near the outside of the fastening bolt 3 and fastening fitting 4, and a bottom plate portion 13 that is formed at the lower end of the leg portion 12 and is formed approximately horizontally along the upper surface of the stacked lower covering plate 2.

[0042] The legs 12 are formed in a generally L-shape in plan view, and are detachably attached to the lower surface of the lower plate 2a by welding or by a plurality of attachment bolts (not shown). Note that the shape of the legs 12 is not limited to an L-shape, and may be circular or rectangular in plan view, or may be groove-shaped or I-shaped, and there may be multiple legs.

[0043] In addition, the bottom plate portion 13 has a bottom plate main body portion 13a which is formed by extending widely from the lower end of the leg portion 12 to just below the fastening fitting 4, and a vertical rib 13b formed along the circumferential direction of the bottom plate main body portion 13a on the peripheral portion of the bottom plate main body 13a, and a bolt through hole 13c is formed in the bottom plate main body portion 13a.

[0044] The bolt through hole 13c is formed with an inner diameter that allows the bolt head 3a of the fastening bolt 3 to pass through, and the center of the bolt through hole 13c and the axis of the fastening bolt 3 are formed so that they are slightly misaligned, so that if the fastening bolt 3 is damaged during tightening, the fastening bolt 3 will not get caught on the peripheral edge of the bolt through hole 13c and fall from the bottom plate portion 13 to the ground.

[0045] In addition, multiple vertical ribs 13b are provided on the edge of the bottom plate main body 13a to prevent parts such as fastening fittings 4 that have fallen onto the bottom plate main body 13a from rotating, preventing them from easily falling from the bottom plate main body 13a to the ground.

[0046] The leg portion 12 and the bottom plate portion 13 may be integrally formed by casting or the like, or may be integrally formed by welding a steel member such as an angle bar and a steel plate or the like.

[0047] The leg 12 also serves as a rotation stopper that stops within a certain range the rotation of the fastener 4 that rotates together with the fastening bolt 3. In this case, one flange 12a of the leg 12 functions as a rotation stopper that limits the rotation of the fastener 4, which rotates together with the fastening bolt 3 around the clockwise and counterclockwise axes of the fastening bolt 3, to a range of approximately 90 degrees in a direction perpendicular to the girder 1 (see Figures 6 and 7(a) and (b)) and in a direction parallel to the girder 1, and also as a positioner that determines the position of the long side direction of the covering plate 2 relative to the direction perpendicular to the axis of the girder 1.

[0048] For example, in Figures 6 and 7(a), (b), the tip portion 12b of the flange 12a holds the fastening fitting 4, which rotates together with the fastening bolt 3 around the clockwise axis of the fastening bolt 3, in a direction perpendicular to the girder 1, and the inner surface portion 12c of the flange 12a holds the fastening fitting 4, which rotates together with the fastening bolt 3 around the counterclockwise axis of the fastening bolt 3, in a direction parallel to the girder 1.

[0049] Note that Figures 6 and 7 are bottom views of the covering plate, so on the drawing, "left axis rotation is right axis rotation" and "right axis rotation is left axis rotation."

[0050] The legs 12 also serve as positioning devices that determine the position of the covering plate 2 in the direction perpendicular to the axis of the girder 1. [Industrial Applicability]

[0051] The present invention can prevent the anti-slip coating treatment on the upper surface of the lower tier lining plate, or the anti-slip sheet from peeling off or breaking due to the lining plate fastening fittings attached to the underside of the lining plate when multiple lining plates are stacked during storage, transportation, etc., and can also prevent parts such as fastening fittings from falling during the lining plate hanging operation or the fastening fitting tightening operation, thereby ensuring work safety. [Explanation of symbols]

[0052] 1 girder material, 1a upper flange, 2 lining plate, 2a lower plate, 2b bolt hole, 3 fastening bolt, 4 fastening hardware, 4a rotation fulcrum part, 4b through hole, 4c rotation stopper, 5 lower coil spring, 6 reaction force receiving plate, 6a concave groove portion, 7 guide collar, 8 upper coil spring, 9 tightening nut, 10 Locking nut, 11 Protective bracket, 12 Leg, 13 bottom plate portion. 13a bottom plate main body portion, 13b vertical rib, 13c Through hole.

Claims

1. A damage prevention device for fastening-type lining plates, comprising a fastening bolt that penetrates the lower plate that forms the lining plate, a fastening fitting attached to the lower end of the fastening bolt and clamping the girder that receives the lining plate below the lower plate, and a protective fitting arranged between the lower plate and the girder and protecting the fastening fitting, wherein the protective fitting is attached to the lower plate and has a leg portion that hangs down below the fastening fitting near the outside of the fastening fitting, and a bottom plate portion formed at the lower end of the leg.

2. 2. The damage prevention device for a fastening type lining plate according to claim 1, wherein the bottom plate portion extends below the fastening metal fittings.

3. 3. A damage prevention device for a fastening type lining plate according to claim 1 or 2, characterized in that a through hole is formed in the bottom plate portion so that the fastening bolt cannot fall out in the event of tightening damage to the fastening bolt.

4. In the damage prevention device for a fastening type covering plate described in claim 1 or 2, the protective fitting also serves as a rotation stopper that prevents rotation of the fastening fitting that rotates together with the fastening bolt within a certain range.

5. A lining plate equipped with a damage prevention device, comprising: a lining plate; a fastening bolt penetrating a lower plate forming the lining plate; a fastening fitting attached to the lower end of the fastening bolt and clamping a girder that supports the lining plate below the lower plate; and a fastening fitting protection fitting attached to the lower plate and protecting the fastening fitting, wherein the fastening fitting protection fitting is attached to the lower plate and has a leg portion that hangs below the lower end of the fastening fitting near the fastening fitting, and a bottom plate portion formed at the lower end of the leg.

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