JP5361636B2 - Floor joint cover device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor joint cover device with a cover body which is adapted to obtain a predetermined rigidity using a thin-walled metal plate comparatively low in cost. <P>SOLUTION: The cover body C includes a cover plate 5 made of metal of rectangular plate shape for covering a joint; and a plurality of reinforcing rib plates 6 comprising joint plates 6a in a plate shape juxtaposed to cover the whole lower face of the cover plate 5 and joined to the lower face of the cover plate 5, and rib parts 6b projected downward from the joint plates 6a and extended in the width direction of the joint. The cover body C having the predetermined rigidity can thereby be manufactured using the thin-walled metal plate comparatively low in cost owing to the combined strength improving action by the joint plates 6a and rib parts 6b of the respective reinforcing rib plates 6, reducing the manufacturing cost of the cover body C. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a floor joint cover device that covers joints between floors of adjacent buildings.

  In a building whose lower part is supported by a seismic isolation device having a buffering function, horizontal shaking during an earthquake tends to increase. Around such a base-isolated structure, a relatively wide joint is formed between the adjacent artificial ground structure, and it is suitable for use as a joint for such a base-isolated structure. A floor joint cover device that can be used has already been proposed by the present applicant (see, for example, Patent Document 1).

  As shown in FIG. 11 (A), such a floor joint cover device is formed between a floor f of a building A as a building and a building B as an artificial ground adjacent to the floor f via a joint s. One end of the cover body C that is passed over to cover the joint s is connected to the side edge of the floor f so as to be tiltable via a connecting means a, and the other end of the cover body C is used as a free end. The end cover plate c is provided at the end with an inclined edge b that is inclined from the lower surface thereof toward the outer upper surface, and is substantially flush with the upper surface d of the cover body C from the upper portion of the inclined edge b. While projecting toward the building B side, a horizontal receiving edge e on the side edge of the building B, and an inclined receiving edge inclined at the outer end of the horizontal receiving edge e in the same direction as the inclined end edge b g, and a free end of the cover body C is mounted on the horizontal receiving edge e of the slide receiving frame h. The outer end of the end cover plate c is placed on the floor i of the building B, and is generated between the inclined end edge b of the cover body C and the inclined receiving edge g of the sliding receiving frame h by the end cover plate c. The upper part of the working gap j is configured to be shielded.

  In the event of an earthquake, when the building A and the adjacent building B are relatively relatively displaced in the approaching direction, the free end of the cover body C moves over the horizontal receiving edge e of the sliding receiving frame h. When horizontally sliding within the range of the working gap j and following the relative displacement, and when the relative displacement is further increased, as shown in FIG. 11 (B), the cover body C uses the connecting means a at one end as a fulcrum. The inclined end edge b formed at the free end is displaced along the inclined receiving edge g of the sliding receiving frame h, so that it can escape from the relative displacement.

  In addition, in such a floor joint cover device, the cover body C formed of a single metal plate is manufactured by the applicant of the present application. As shown in FIG. 12, this is a cover body C made of a relatively thick metal plate, and one end of the cover body C is connected to the side edge of the floor f of the building A via a connecting means k. And the other end of the cover body C, which is a free end, is mounted on the horizontal receiving edge e of the sliding receiving frame h disposed on the side edge of the building B. . Here, an engagement rod m made of a square pipe is disposed in a direction along the joint s at the lower part of one end of the cover body C, and the engagement rod m is provided on the side edge of the floor f of the building A. An engaged member n having a substantially U-shaped cross section that can be engaged from above is attached to the L-shaped bracket p in a supported state. The engagement member n and the engagement rod m constitute connection means k that connects one end of the cover body C to the side edge of the floor f of the building A so as to be tiltable. Further, on the upper surface of the cover body C, a decorative sheet r made of the same synthetic resin as the decorative sheet r also serving as a slip stopper laid on the floor f of the building A and the floor i of the building B is attached. . The metal plate constituting the cover body C is made of a stainless steel plate or a steel plate having a thickness of about 9 mm. The thick steel plate has a high rigidity capable of withstanding the load of a vehicle or the like on the cover body C. I have to.

JP 10-317516 A

  By the way, the conventional cover body C made of a single metal plate uses a thick steel plate having a thickness of about 9 mm in order to obtain a predetermined rigidity. Therefore, there is a problem that the manufacturing cost of the cover body C using this increases.

  The present invention has been made to solve such a problem, and is a floor joint cover device including a cover body that has a predetermined rigidity using a relatively inexpensive thin metal plate. It is intended to provide.

  According to the present invention, one end of a cover body that is passed to a joint between floors of adjacent buildings is connected to a side edge of one floor via a connecting means, and the other end of the cover body is connected to a free end. In the floor joint cover device in which the free end is slidably mounted on the side edge of the other floor, the cover body is a flat rectangular metal cover plate covering the joint, and the cover A flat joint plate portion that is arranged in parallel to cover the entire lower surface of the plate and is joined to the lower surface of the cover plate, and a rib portion that protrudes downward from the joint plate portion and extends in the joint width direction. A floor joint cover device, comprising: a plurality of reinforcing rib plates made of metal.

  Here, as the material of the cover plate and the reinforcing rib plate, stainless steel plate (SUS304) or steel plate (SS400) is suitable. The cover plate has a thickness of about 2 mm and the reinforcing rib plate has a thickness of about 1.5 to 1.7 mm. Things can be used.

  In the floor joint cover device, a configuration may be proposed in which the reinforcing rib plate is integrally formed by bending a metal plate so that the joining plate portion and the rib portion are continuous.

  In addition, a horizontal plate portion having a predetermined width extending in the joint width direction at a lower portion of both end portions along the joint width direction of the cover body, and an inclined plate inclined from the inner end of the horizontal plate portion toward the inner upper portion It is possible to propose a configuration in which a hook preventing member including a portion is provided.

  In the present invention, as described above, the cover body is provided in parallel so as to cover the flat plate-shaped metal cover plate covering the joint and the entire lower surface of the cover plate, and is joined to the lower surface of the cover plate. A plurality of reinforcing rib plates made of metal, and a plurality of reinforcing rib plates made of metal including a rib portion projecting downward from the joint plate portion and extending in the joint width direction. The strength of the cover plate can be improved not only by the strength of the rib portion of the reinforcing rib plate but also by the joining plate portions of the plurality of reinforcing rib plates joined to the lower surface of the cover plate. And, by such a synergistic strength improving action by the rib portion and the joining plate portion of each reinforcing rib plate, a cover body having a predetermined rigidity can be manufactured using a relatively inexpensive thin metal plate. This can reduce the manufacturing cost of the cover body.

  Further, in the configuration in which the reinforcing rib plate is integrally formed by bending the metal plate so that the joining plate portion and the rib portion are continuous, a bending process or a pressing process for one metal plate is performed. Reinforcement with superior strength compared to the case where the joining plate portion and the rib portion are formed separately and joined by integrally forming the reinforcing rib plate by connecting the joining plate portion and the rib portion continuously A rib plate can be obtained, which can be easily formed and does not require a joining operation.

  In addition, a horizontal plate portion having a predetermined width extending in the joint width direction at a lower portion of both end portions along the joint width direction of the cover body, and an inclined plate inclined from the inner end of the horizontal plate portion toward the inner upper portion Are provided on the floor on which the free end of the cover body is mounted at the time of relative displacement in the direction along the joints of adjacent buildings during an earthquake. When the side end portion of the cover body that protrudes from the side end of the receiving frame is returned to the receiving frame again, the lower portion of the side end portion of the cover body is lowered by the sliding action that occurs in the inclined plate portion of the hook preventing member. It can return smoothly without being caught on the side edge.

It is a longitudinal front view which shows the construction state of the joint cover apparatus for floors concerning a 1st Example. It is a top view which shows the state which has arrange | positioned several cover bodies C continuously in the direction in alignment with the joint s. It is an AA line expanded sectional view in FIG. It is an BB line expanded sectional view in Drawing 5. It is a partially notched top view of the cover body C which comprises the joint joint cover apparatus for floors concerning a 1st Example. It is a bottom view of the cover body C same as the above. It is an enlarged view of the connection means 14 part. It is action | operation explanatory drawing of the hook prevention member 13. FIG. It is a vertical front view which shows the construction state of the joint cover apparatus for floors concerning a 2nd Example. It is a vertical side view of the cover body C which shows the other arrangement | positioning aspect of the reinforcing rib board 6 concerning a modification. (A) is a schematic longitudinal front view of a floor joint cover device having a conventional structure, and (B) is an operation explanatory view thereof. It is a vertical front view which shows the construction state of the floor joint cover apparatus provided with the cover body C of the conventional structure.

  A first embodiment of a floor joint cover device according to the present invention will be described with reference to FIGS.

  In FIG. 1, A is a seismic isolation structure whose lower part is supported by a seismic isolation device (not shown) having a buffer function, and B is a structure formed around the building A. Adjacent via s. The joint s is formed with a predetermined width along the periphery of the building A, and can absorb the horizontal fluctuation of the building A and the surrounding building B in the event of an earthquake. The building B shown in FIGS. 1 and 2 is a narrow connecting passage portion of the building B projecting from the building A through the joint s.

  At the side edge of the floor f2 of the building B, as shown in FIG. 1, a supporting step edge 1 that is recessed at a depth corresponding to the thickness of a cover body C to be described later is provided in the width direction of the joint s (FIG. 1). The front slide receiving frame 2 having a horizontal receiving edge 2a is disposed on the front end ridge of the supporting step edge 1. Further, on the rear end side of the support step edge 1, a second horizontal receiving edge 3c is coupled to the rear end of the first horizontal receiving edge 3a via an inclined receiving edge 3b, and further the second horizontal receiving edge 3c. A rear slide receiving frame 3 is provided at the rear end thereof, which is coupled with an inclined receiving edge 3d inclined upward toward the upper surface of the floor f2. Here, the depth of the second horizontal receiving edge 3c is set to a depth corresponding to the thickness of the end cover plate 8 disposed in the front portion of the cover body C. Thus, the upper surface of the end cover plate 8 is substantially flush with the upper surface of the floor f2. The front sliding receiving frame 2 and the rear sliding receiving frame 3 are arranged so as to extend in a direction along the joint s (the front-rear direction in FIG. 1), and the length thereof is as shown in FIG. In a state where a plurality of cover bodies C are arranged, the length is set to be approximately equal to the distance between the outer end portions of the cover bodies C and C located at both ends thereof. The front sliding receiving frame 2 and the rear sliding receiving frame 3 can be integrally formed without being divided as shown.

  A cover body C is passed between the floor f1 of the building A and the floor f2 of the building B to cover the joint s. A plurality of the cover bodies C are continuously arranged in a direction along the joint s (see FIG. 2), and each cover body C has one end as a building as shown in FIG. It is connected to the side edge of the floor f1 of A through a connecting means 14 described later so as to be tiltable. Each cover body C has the other end as a free end, and the free end is slidably mounted on the support step edge 1 on which the front slide receiving frame 2 and the rear slide receiving frame 3 are disposed. ing.

  As shown in FIGS. 1 and 3 to 6, each cover body C includes a flat cover plate 5 that covers the joint s, and a plurality of reinforcing rib plates 6 disposed below the cover plate 5. The reinforcing rib plates 6 are arranged side by side so as to cover the entire lower surface of the cover plate 5. The cover plate 5 is made of a metal plate made of a stainless steel plate (SUS304) having a thickness of about 2 mm, and is formed in a rectangular shape having a length of about 1087 mm and a width of about 996 mm. On the other hand, each reinforcing rib plate 6 is made of a strip-shaped metal plate having a predetermined length made of a stainless steel plate (SUS304) having a thickness of about 1.5 to 1.7 mm, and is joined to the lower surface of the cover plate 5. A flat plate-like joining plate portion 6a and a rib portion 6b projecting downward from the joining plate portion 6a and extending in the width direction of the joint s are provided. Here, as shown in FIG. 3, each reinforcing rib plate 6 is formed with an inverted trapezoidal bulging rib 7a that bulges downward in the central portion in the lateral width direction by bending or pressing a single metal plate. Then, end ribs 7b and 7b bent downward are formed on the outer ends of the plate-like joining plate portions 6a and 6a coupled to both upper sides of the bulging rib 7a. And the rib part 6b of the reinforcement rib board 6 is comprised by this bulging rib 7a and edge part rib 7b, 7b. By integrally forming the reinforcing rib plate 6 by bending the metal plate so that the joining plate portions 6a, 6a, the bulging rib 7a as the rib portion 6b, and the end ribs 7b, 7b are continuous as described above. As compared with the case where the joining plate portions 6a, 6a and the rib portion 6b are separately formed and joined to each other, the reinforcing rib plate 6 having excellent strength can be obtained, and the formation is easy and the joining work is also performed. There is an advantage that becomes unnecessary. Note that the reinforcing rib plates 6 and 6 disposed on both side end portions of the cover plate 5 do not include the inverted trapezoidal bulging ribs 7a that bulge downward, and are attached to the joining plate portion 6a and the both side ends thereof. It is comprised by the edge part ribs 7b and 7c bent downward (refer FIG. 3).

  Each reinforcing rib plate 6 is joined to the cover plate 5 at a plurality of locations of the joining plate portion 6a addressed to the lower surface of the cover plate 5 by welding. In addition, the adjacent reinforcing rib plates 6 and 6 are joined to each other through welding applied to a plurality of required locations with the end ribs 7b and 7b in contact with each other. Yes.

  As described above, the cover plate 5 reinforced with the plurality of reinforcing rib plates 6 is provided with the end cover plate 8 bent in a substantially crank shape at the front end and the rear wall plate 9 at the rear end. It is arranged. Further, side plates 10 and 10 are disposed at both ends of the cover plate 5. The end cover plate 8, the rear wall plate 9, and the side plates 10 and 10 are made of a metal plate made of a stainless steel plate (SUS304), and the cover plate is welded to a plurality of required locations. 5 is joined. Further, the upper ends of the end cover plate 8, the rear wall plate 9, and the side plates 10, 10 are protruded to a height position slightly above the upper surface of the cover plate 5, thereby the upper surface of the cover plate 5. In addition, a deposition region 11 having a predetermined depth is formed that is surrounded by the upper ends of the end cover plate 8, the rear wall plate 9, and the side plates 10, 10. A decorative sheet 12 made of the same synthetic resin as the decorative sheet 12 that also serves as an anti-slip laid on the floor f1 of the building A and the floor f2 of the building B is attached to the deposition region 11 (FIG. 1). reference).

  At the lower part of both end portions of the cover body C, the hook preventing members 13, 13 are respectively arranged. The hook preventing members 13 and 13 each have a horizontal plate portion 13a having a predetermined width extending in the width direction of the joint s, and an inclined plate portion 13b that is inclined from the inner end of the horizontal plate portion 13a toward the inward upper portion. (See FIG. 3), and the horizontal plate portions 13a, 13a are set to be at the same height as the bottom surface of each of the bulging ribs 7a. The catch preventing members 13 and 13 are made of a strip-like metal plate made of a stainless steel plate (SUS304) having a predetermined thickness, and are covered through welding applied to a plurality of required locations. It is joined to the body C. Here, in the illustrated example, the hook preventing member 13 and the side plate 10 are integrally formed by bending or pressing a strip-shaped metal plate. However, the hook preventing member 13 is formed with the side plate 10. It is also possible to form it separately.

The connecting means 14 will be described with reference to FIG.
On the side edge of the floor f1 of the building A, a holding frame 15 is disposed so as to extend in a direction along the joint s. The holding receiving frame 15 is formed in an L-shaped cross section having a horizontal receiving edge 15a and a vertical edge 15b, and one end of the cover body C described above is mounted on the upper surface of the horizontal receiving edge 15a. A plurality of screw rods 16 made of bolts inserted into the horizontal receiving edge 15a from the lower surface side thereof and fixed to the horizontal receiving edge 15a through welding are provided on both horizontal plate portions 13a of the hook preventing member 13. , 13a are respectively erected at positions corresponding to the insertion holes 17, 17. In a state where one end of the cover body C is mounted on the horizontal receiving edge 15a, each screw rod 16 is loosely fitted into the insertion hole 17 of each horizontal plate portion 13a from below and protrudes above the horizontal plate portion 13a. An elastic member 18 made of a substantially cylindrical rubber bush is fitted on the protruding portion. A pressure receiving nut 19 provided with a hook or a washer is screwed to the upper portion of each screw rod 16, and the elastic member 18 is held in an appropriate compressed state by the pressure receiving nut 19. One end of each is biased downward. Thus, the elastic member 18 interposed between the pressure receiving nut 19 and the horizontal plate portion 13a is in a compressed state that can be further compressed from below, and thereby, one end of the cover body C can be tilted. ing. Then, each of the screw rods 16, the insertion holes 17 of the horizontal plate portion 13a, the resilient member 18, and the pressure receiving nut 19 are connected so that one end of the cover body C is tiltably connected to the side edge of the floor f1 of the building A. Means 14 are configured. Further, the cover plate 5 has a rectangular operation port 20 (FIG. 5) that allows the elastic member 18 and the pressure-receiving nut 19 to be attached at positions corresponding to the positions above the insertion holes 17 of the horizontal plate portions 13a. Each of which is opened, and a shielding lid 21 having a substantially U-shaped cross section is detachably fitted to the operation port 20. The resilient member 18 may be a coiled compression spring.

Next, the operation mode of the floor joint cover device having such a configuration will be described.
In the cover body C, the decorative sheet 12 adhered to the upper surface of the cover plate 5 is substantially flush with the decorative sheet 12 laid on the upper surface of the floor f1 of the building A and the upper surface of the floor f2 of the building B. Accordingly, as shown in FIG. 1, there is no step between the cover C and the floor f1 of the building A or the floor f2 of the building B at all times.

  When the building A and the adjacent building B are relatively displaced in the event of an earthquake, the cover C has a lower edge of the end cover plate 8 disposed at the free end, and the inclined receiving edge 3b. It is possible to escape from the relative displacement by tilting about one end connected by the connecting means 14 as a fulcrum. Here, in the cover body C, the bulging ribs 7a of the plurality of reinforcing rib plates 6 and the horizontal plate portions 13a, 13a of the hook preventing members 13, 13 are arranged along the width direction of the joint s. Thus, after passing the end cover plate 8 shifted up the inclined receiving edge 3b, the cover body C is slid by the bottom surfaces of the respective bulging ribs 7a and the horizontal plate portions 13a and 13a that contact the upper end of the inclined receiving edge 3b. It can be performed smoothly.

  When the building A and the adjacent building B are relatively displaced in the direction away from each other, the cover body C slides horizontally on the support step edge 1 with the free end facing in the opposite direction to the inclined receiving edge 3b. Move to follow the relative displacement.

  When the building A and the building B return to the steady position after the earthquake, the free end of the cover body C also returns to the steady position shown in FIG. 1, and the cover body C is in the steady state. Return to.

  Further, when the building A and the adjacent building B are relatively displaced in the direction along the joint s, the free end of the cover body C is supported by the front sliding receiving frame 2 and the rear sliding receiving frame 3 disposed. It slides on the step edge 1 in the direction along the joint s to follow the relative displacement. At this time, the lengths of the front sliding receiving frame 2 and the rear sliding receiving frame 3 substantially coincide with the distance between the outer ends of the cover bodies C and C located at both ends of the plurality of cover bodies C. Due to the length, as shown in FIG. 8, when the side end portion of the cover body C protruding laterally from both sliding receiving frames 2 and 3 returns to the both sliding receiving frames 2 and 3 again, it is pulled. The lower part of the side end portion of the cover body C is not caught by the side ends of the sliding receiving frames 2 and 3 due to the sliding action generated in the inclined plate portion 13b of the hanging prevention member 13, and can return smoothly.

  Further, when the building A and the adjacent building B are relatively displaced in the vertical direction, the cover body C uses the connecting means 14 as a fulcrum at one end connected to the side edge of the floor f1 of the building A. It tilts with the vertical movement of A or the adjacent building B and follows its relative displacement.

  In such a configuration, as described above, the cover body C is juxtaposed so as to cover the flat rectangular metal cover plate 5 covering the joint s and the entire lower surface of the cover plate 5. A flat plate-like bonding plate portion 6a, 6a bonded to the lower surface of the metal plate, and a rib portion 6b protruding downward from the bonding plate portion 6a, 6a and extending in the width direction of the joint s. Since the plurality of reinforcing rib plates 6 are provided, not only the strength is improved by the rib portions 6b of the plurality of reinforcing rib plates 6, but also the bonding plate portions of the plurality of reinforcing rib plates 6 bonded to the lower surface of the cover plate 5. The strength of the cover plate 5 can be improved by 6a and 6a. And the cover body provided with the predetermined rigidity using the comparatively cheap thin metal plate by the synergistic strength improvement effect | action by such rib part 6b of each reinforcement rib board 6, and joining board part 6a, 6a. C can be manufactured, whereby the manufacturing cost of the cover body C can be reduced.

  FIG. 9 shows a second embodiment, in which the floor f2 of the building B adjacent to the building A via the joint s is compared with the height of the floor f1 of the building A. The front sliding receiving frame 2 having a horizontal receiving edge 2a on the side edge of the floor f2 and a pair of horizontal receiving edges 3e and 3e divided in the front and rear directions are set lower by the thickness of the cover body C. The provided rear sliding receiving frame 3 is disposed. Further, the cover body C, which is passed over the joint s between the floor f1 of the building A and the floor f2 of the building B and covers the joint s, has one end at the side edge of the floor f1 of the building A as described above. The other end of the free end of the building B is slidably mounted on the side edge of the floor f2 of the building B.

  Similarly to the first embodiment, the cover body C is arranged in parallel so as to cover the flat rectangular metal cover plate 5 covering the joint s and the entire lower surface of the cover plate 5. A plurality of metal reinforcements comprising flat joining plate portions 6a, 6a to be joined and rib portions 6b protruding downward from the joining plate portions 6a, 6a and extending in the width direction of the joint s. And a rib plate 6 (see FIG. 3). Further, the end cover plate 8 disposed at the other end of the cover plate 5 is connected to a slope portion 22 inclined downward with an appropriate gradient, and the slope portion 22 allows the free end of the cover body C to be connected. A steep step is prevented from occurring between the upper surface of the side end and the upper surface of the floor f2 of the building B.

  In addition, about the component which is common in 1st Example, the code | symbol same as 1st Example is attached | subjected and duplication description is abbreviate | omitted.

  In the floor joint cover device having such a configuration, the cover body C always covers the joint s at the steady position shown in FIG. When the building A and the adjacent building B are relatively displaced in the earthquake, the free end of the cover body C slides horizontally on the side edge of the floor f2 of the building B. Follow the relative displacement of the lever.

  Even in the second embodiment, the cover body C is juxtaposed so as to cover the flat rectangular metal cover plate 5 covering the joint s and the entire lower surface of the cover plate 5, and the cover plate 5 is made of a metal having flat joining plate portions 6a and 6a joined to the lower surface of 5 and rib portions 6b projecting downward from the joining plate portions 6a and 6a and extending in the width direction of the joint s. Since the plurality of reinforcing rib plates 6 are provided, not only the strength is improved by the rib portions 6b of the plurality of reinforcing rib plates 6, but also the joining plates of the plurality of reinforcing rib plates 6 bonded to the lower surface of the cover plate 5. The strength of the cover plate 5 can be improved by the portions 6a and 6a. And the cover body provided with the predetermined rigidity using the comparatively cheap thin metal plate by the synergistic strength improvement effect | action by such rib part 6b of each reinforcement rib board 6, and joining board part 6a, 6a. C can be manufactured, whereby the manufacturing cost of the cover body C can be reduced.

  In each of the above embodiments, the metal plate of each member constituting the cover body C is a stainless steel plate (SUS304), but a steel plate (SS400) may be used instead. Further, in each of the above embodiments, the example in which the four reinforcing rib plates 6 are used as the plurality of reinforcing rib plates 6 arranged side by side so as to cover the entire lower surface of the cover plate 5 is shown. The number is not limited to this, and more reinforcing rib plates 6 may be arranged on the lower surface of the cover plate 5 as in the modified embodiment shown in FIG.

A building B building C cover body f1 floor f2 floor s joint 5 cover plate 6 reinforcing rib plate 6a joint plate portion 6b rib portion 13 catching prevention member 13a horizontal plate portion 13b inclined plate portion 14 connecting means

Claims (2)

One end of the cover body passed to the joint between the floors of adjacent buildings is connected to the side edge of one floor via a connecting means, and the other end of the cover body is a free end, and the free body In the floor joint cover device in which the end is slidably mounted on the side edge of the other floor,
The cover body is
A flat rectangular metal cover plate covering the joints;
A flat plate-like bonding plate portion that is juxtaposed so as to cover the entire lower surface of the cover plate, and a rib portion that protrudes downward from the bonding plate portion and extends in the joint width direction. And a plurality of reinforcing rib plates made of metal with
A horizontal plate portion having a predetermined width extending in the joint width direction at a lower portion of both end portions along the joint width direction of the cover body, and an inclined plate portion inclined from the inner end of the horizontal plate portion toward the inner upper portion A floor joint cover device, wherein a hook preventing member is provided .   The floor joint cover device according to claim 1, wherein the reinforcing rib plate is integrally formed by bending a metal plate so that the joining plate portion and the rib portion are continuous.

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