Covering plate

Abstract

To provide a covering plate that can be easily maintained and inspected by visually observing the web of shape steel.SOLUTION: A covering plate 10 has a rectangular covering plate body 12 that is formed by arranging in parallel multiple shape steels 11, each of which has a front flange 13 and a back flange 14 that are parallel to each other, and a web 15 that is integral with the flanges 13, 14; side plates 17 are attached to both side surfaces of the covering plate body 12, and covering plates 18 attached to both end surfaces of the covering plate body 12 are formed with inspection windows 28 that expose the ends of the webs 15 to the outside, and the webs 15 can be visually observed from the outside through the inspection windows 28.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a covering plate having a plurality of shaped steel members arranged in parallel and used in civil engineering and construction work. [Background technology]

[0002] In civil engineering and construction work, cover plates are used to cover openings formed on the ground surface. For example, when constructing underground structures such as subways and underground buried pipes, excavation work is carried out from the ground surface into the ground to form underground spaces. When the underground structure is being constructed, the openings of the underground spaces are covered with cover plates, which form a temporary road surface or passageway. This allows vehicles and pedestrians to pass over the cover plates even during underground space construction.

[0003] As described in Patent Document 1, the lining plate is lifted and transported by a crane toward lining girders, or beams, laid parallel to each other in the opening, and both ends of the lining plate are fixed to the beams.

[0004] As described in Patent Document 2, the covering plate has a rectangular shape formed by arranging multiple steel sections in parallel, each of which has an upper flange, i.e., a front flange, a lower flange, i.e., a back flange, and a web. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-174066 A [Patent Document 2] JP 2012-193614 A Summary of the Invention [Problem to be solved by the invention]

[0006] Since vehicles and pedestrians pass over the covering plates, the covering plates are regularly maintained and inspected to ensure the safe passage of vehicles and pedestrians.

[0007] As described above, in a lining plate made of a plurality of shaped steel, side plates, i.e., side panels, are provided on both sides of the lining plate, end plates, i.e., cover plates, are provided on both end faces, and the web of the shaped steel is covered by the side plates and cover plates. For this reason, it is not easy to visually observe the state of the web assembled inside the lining plate during maintenance and inspection of the lining plate.

[0008] The present invention has been made in light of the above-mentioned technical background, and aims to provide a covering plate that allows maintenance and inspection to be easily performed by visually observing the web of the structural steel. [Means for solving the problem]

[0009] In order to solve the above problem, the covering plate of the present invention described in claim 1 comprises a rectangular covering plate body formed by arranging in parallel a plurality of structural steel beams, each of which has mutually parallel front and back flanges and a web integral with the front and back flanges, side plates attached to both side surfaces of the covering plate body, and a covering plate attached to both end surfaces of the covering plate body, which has an inspection window formed therein for exposing the ends of the webs to the outside, and which is characterized in that the webs can be visually observed through the inspection window.

[0010] The covering plate according to claim 2 is the invention according to claim 1, characterized in that the inspection window is formed in the covering plate so as to straddle the end face of the web.

[0011] The covering plate described in claim 3 is characterized in that, in the invention described in claim 1, each of the structural steel is an H-shaped steel in which the flanges are integrated at the widthwise center of the front and back flanges, and the inspection window that exposes to the outside both side surfaces of one of the webs and a side surface of one of the other webs adjacent to the web that faces the side surface of the web is formed in the covering plate.

[0012] The covering plate described in claim 4 is characterized in that, in the invention described in claim 3, the covering plate body is formed using an odd number of the structural steels, and the inspection windows are formed in the covering plate corresponding to every other web from one side of the covering plate body to the other side.

[0013] The covering plate described in claim 5 is characterized in that, in the invention described in any one of claims 1 to 4, the structural steel is a striped H-shaped steel having an uneven portion provided on the outer surface of at least the front side of the flange. Effect of the Invention

[0014] According to the present invention, the cover plate attached to both end faces of the cover plate body has an inspection window, so that the inside of the cover plate can be easily visually observed from the outside during maintenance and inspection of the cover plate. Moreover, if dirt or rust is found inside by visual inspection, it is possible to easily remove it, reliably prevent deterioration of the shaped steel, and improve the durability of the cover plate. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is an oblique view showing the surface side of a covering plate according to one embodiment. [Diagram 2] This is an oblique view showing the surface side of the covering plate with the covering plate removed. [Diagram 3] FIG. 2 is a front view of FIG. [Figure 4] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Diagram 5] FIG. 2 is a side view of FIG. [Figure 6] FIG. 2 is a bottom view of FIG. [Figure 7] FIG. 5 is an enlarged cross-sectional view of part B in FIG. [Figure 8] FIG. 6 is an enlarged front view of part C in FIG. 5. [Figure 9] An oblique view showing the surface side of a covering plate in another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the drawings for explaining the embodiment, the same components are generally designated by the same reference numerals, and the repeated description will be omitted.

[0017] The lining plate 10 shown in Figures 1 and 2 has a rectangular lining plate body 12 formed by arranging and joining five shaped steel pieces 11 in parallel. As shown in Figure 7, each shaped steel piece 11 has a front flange 13 and a back flange 14, both of which extend parallel to each other and are integrated via a web 15.

[0018] The shaped steel 11 is an H-shaped steel with an H-shaped cross section, consisting of flanges 13, 14 and a web 15 that is integrated at the center in the width direction. The lining plate body 12 is assembled by welding adjacent shaped steels 11 with the side faces of the flanges 13 and 14 abutting against each other. The top plate 13a of the lining plate 10 is formed by the multiple upper flanges 13, and the bottom plate 14a of the lining plate 10 is formed by the multiple lower flanges 14.

[0019] Furthermore, as shown in Figs. 1 and 2, quadrilateral recesses 16 are formed in a lattice pattern at regular intervals on the outer surface of the flange 13 on the front side of the shaped steel 11, and unevenness is formed on the entire outer surface of the flange 13 constituting the top plate 13a. This ensures safety when workers move on the lining plate 10 without slipping. As shown in Fig. 7, H-shaped steel, i.e., striped H-shaped steel, in which recesses 16 are also formed on the outer surface of the flange 14 on the back side is used as the shaped steel 11, and when manufacturing the lining plate 10 by combining multiple shaped steels 11, any one of the flanges can be the front flange 13. However, the lining plate 10 may be manufactured using a shaped steel in which unevenness is provided only on the outer surface of at least the front flange 13 of the flanges 13 and 14.

[0020] 1 and 2, side plates 17 are attached to both side surfaces of the covering plate body 12, and the webs 15 on both side surfaces of the covering plate body 12 are each covered by the side plates 17. Covering plates 18 are attached to both end surfaces of the covering plate body 12, and both end surfaces of the covering plate body 12 are each covered by the covering plates 18. The side plates 17 are also called side plates, and the covering plates 18 are also called end plates.

[0021] Engagement holes 19 are provided at the four corners of the top plate 13a for engaging hooks of a hoisting machine such as a crane when suspending the covering plate 10 by the hoisting machine. Communication holes 21 are formed at both ends of the side plates 17 corresponding to the respective engagement holes 19, and foreign matter such as dust that has entered the inside through the engagement holes 19 can be discharged to the outside through the communication holes 21. As shown in Fig. 2, the side plates 17 are attached to both side surfaces of the covering plate body 12, and the side plate 17 attached to the opposite side surface in Fig. 2 also has a communication hole 21 formed therein.

[0022] Fig. 3 is a front view of Fig. 1, and Fig. 4 is a cross-sectional view taken along line AA of Fig. 2. Fig. 5 is a side view of Fig. 1, and Fig. 6 is a bottom view of Fig. 1.

[0023] As shown in Fig. 6, rubber pads 22 are attached to the four corners of the bottom plate 14a of the lining plate 10, and as shown in Fig. 5, when the lining plate 10 is installed on a girder 23 laid in an opening of an underground space, the rubber pads 22 come into contact with the surface of the girder 23. This suppresses noise generation when vehicles or construction machines run on the lining plate 10. As shown in Fig. 7, the rubber pad 22 has an elastically deformable engaging head 22a that passes through a through hole 24 formed in the bottom plate 14a, and the rubber pad 22 is detachably attached to the bottom plate 14a.

[0024] As shown in Fig. 6, stoppers 25 are attached to the four corners of the bottom plate 14a. In order to prevent the covering plate 10 from shifting in the longitudinal direction when the covering plate 10 is installed on the girder 23, a deck piece 26 that abuts against the girder 23 is attached to the stopper 25, and the stopper 25 has an attachment hole 25a for attaching the deck piece 26, as shown in Fig. 7. Note that the deck piece 26 is not shown in Figs. 3, 4, and 7. Also, the recess 16 formed on the outer surface of the back flange 14 is not shown in Fig. 6.

[0025] As shown in Figures 1 and 3, the cover plate 18 is formed with three inspection windows 28 that expose the ends of the webs 15 to the outside. Each inspection window 28 has a width W that is approximately half the width of the web 15 and a height H that is approximately two-thirds the width of the cover plate 18. The lower end of the inspection window 28 is an open end that opens downward, and the upper end is a closed end that has a semicircular arc shape. In other words, the inspection window 28 is in an inverted U-shape. The illustrated cover plate 10 is formed from five shaped steels 11, and three inspection windows 28 are formed.

[0026] 3 and 4, the webs 15 of the five shaped steels 11 are shown in parentheses from left to right as 15a to 15e, and the three inspection windows 28 are shown in parentheses from left to right as 28a, 28b, and 28c, and the three inspection windows 28a to 28c are formed in the covering plate 18 corresponding to every other web 15a, 15c, and 15e from one side to the other side in the width direction of the covering plate 10. In FIG. 3, the webs 15b and 15d covered by the covering plate 18 can be visually observed from the outside through the inspection windows 28 at positions corresponding to the other adjacent webs.

[0027] As described above, the arc-shaped closed end of the inverted U-shaped inspection window 28 is provided at a position that becomes the upper end when the covering plate 10 is used, so that the upper side of the covering plate 18 is in a continuous state, and the strength of the covering plate 10 on the top plate 13a side to which the load is applied can be increased. Meanwhile, the lower end of the inspection window 28 is open, so that dirt and the like that has entered the inside can be easily discharged to the outside from the end side of the flange 14.

[0028] The two webs 15a, 15e located on both sides of the covering plate 10 are located in the widthwise center of the inspection windows 28a, 28c formed at both ends of the covering plate 18, and the web 15c located in the center of the covering plate 10 is located in the widthwise center of the inspection window 28b formed in the center of the covering plate 18. The other two webs 15b, 15d can be visually observed through the other two inspection windows 28 adjacent to each other on both sides of the covering plate 10 in the widthwise direction.

[0029] Thus, the inspection window 28a exposes to the outside both side surfaces of one web 15a and a side surface of another web 15b adjacent to the web 15a that faces the side surface of the web 15a. Similarly, the inspection window 28b exposes to the outside both side surfaces of one web 15c and a side surface of another web 15b and a side surface of another web 15d adjacent to the web 15c that faces the web 15c. Furthermore, the inspection window 28c exposes to the outside both side surfaces of one web 15e and a side surface of another web 15d adjacent to the web 15e that faces the side surface of the web 15e.

[0030] 3 shows the cover plate 18 attached to one end surface of the cover plate body 12, but the cover plate 18 attached to the other end surface has the same structure. The strength of the cover plate 10 is increased by attaching side plates 17 to both side surfaces of the cover plate body 12 and by attaching cover plates 18 to both end surfaces.

[0031] As described above, the inspection window 28 that exposes the end of the web 15 to the outside is provided in the covering plate 18, so that the inside of the covering plate 10 covered by the covering plate 18 and the side plate 17, that is, the web 15, can be visually observed from the outside during periodic maintenance and inspection of the covering plate 10. This makes it easy to perform the "scraping work" when maintaining the covering plate 10. In the scraping work, in addition to inspecting the occurrence of dirt and rust on the outer surface of the covering plate 10, it is also possible to inspect whether dirt and rust have occurred on the side surface of the web 15, and if dirt and rust have occurred, these can be removed to repair the deterioration of the shaped steel 11. In the scraping work, it is also possible to repair the deterioration of the inner surfaces of the front and back flanges 13 and 14.

[0032] In this way, scraping work can be easily performed not only on the outer surface of the covering plate 10 but also on the inside, so that quality control of the covering plate 10 can be carried out reliably and the durability of the covering plate 10 can be improved.

[0033] 9 is a perspective view showing the front side of a covering plate according to another embodiment. In this covering plate 10, inspection windows 28 are formed in the covering plate 18 corresponding to the webs 15 of the five shaped steels 11. In this manner, the ends of the webs 15 may be positioned in the widthwise center of all the inspection windows 28. In this case, inspection and scraping work for all the webs 15 can be easily performed.

[0034] On the other hand, when the covering plate 10 is formed using an odd number of structural steel beams 11 as shown in the figure, by forming inspection windows 28 corresponding to every other web 15 from one side of the covering plate body 12 to the other side, as in the covering plate 10 shown in Figure 1, it is possible to easily perform maintenance and inspection of the covering plate 10 while increasing the strength of the covering plate 10.

[0035] In the above embodiment, the structural steel 11 is made of a striped H-shaped steel, but the covering plate 10 may also be made of a structural steel having a U-shaped cross section, for example, as long as the structural steel has a front flange, a back flange, and a web.

[0036] The invention made by the inventor has been specifically described above based on the embodiments, but the embodiments disclosed in this specification are illustrative in all respects and are not limited to the disclosed technology. In other words, the technical scope of the present invention should not be interpreted restrictively based on the description in the above embodiments, but should be interpreted strictly according to the description in the claims, and includes technologies equivalent to the described technologies in the claims and all modifications that do not deviate from the gist of the claims.

[0037] For example, the shape of the inspection window 28 is not limited to an inverted U-shape, but may be a circular or rectangular through-hole, or the inspection window 28 may be formed as a slit penetrating through the cover plate 18 in the width direction. Furthermore, the shape of the closed end of the inspection window 28 does not have to be semicircular, but may be linear. [Industrial Applicability]

[0038] The covering plate of the present invention can be used as a temporary road when roads are excavated for underground construction work such as subways, water supply and sewerage systems. [Explanation of symbols]

[0039] 10 Covering plate 11 Shaped steel 12 Covering plate body 13 Flange 13a Tabletop 14 Flange 14a Bottom plate 15. Web 16 Recess 17 Side Panel 18 Cover plate 19 Engagement hole 21 Communication hole 22 Rubber pad 23 Girder material 24 Through hole 25 Stopper 26 Deck Pieces 28 Inspection window

Claims

1. A rectangular covering plate body formed by arranging a plurality of shaped steels in parallel, each of which has a front side and a back side flange parallel to each other and a web integral with the front side and back side flanges; Side plates attached to both sides of the covering plate body; A cover plate is provided on both end surfaces of the cover plate body, and an inspection window is formed to expose the end of the web to the outside. A covering plate characterized in that the web can be visually observed through the inspection window.

2. A covering plate according to claim 1, characterized in that the inspection window is formed in the covering plate so as to straddle the end face of the web.

3. Each of the shaped steels is an H-shaped steel in which the flanges are integrated at the center of the width direction of the front and back flanges, A covering plate as described in claim 1, characterized in that the inspection window is formed in the covering plate to expose both side surfaces of one of the webs and a side surface of another of the webs adjacent to the web to the outside.

4. A lining plate as described in claim 3, characterized in that the lining plate body is formed from an odd number of the structural steels, and the inspection windows are formed in the lining plate corresponding to every other web from one side of the lining plate body to the other side.

5. The covering plate according to any one of claims 1 to 4, characterized in that the structural steel is a striped H-shaped steel having an uneven portion provided on at least the outer surface of the front flange.

Images