JP7626434B2 - Floor joint cover device - Google Patents

Description

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

In recent years, in order to minimize damage caused by earthquakes, many buildings have been constructed whose lower parts are supported by seismic isolation devices with shock-absorbing functions. Relatively wide joints that can absorb displacement caused by earthquakes are formed between buildings with such seismic isolation structures, and floor joint cover devices are installed to cover these joints.

For example, the configuration of Patent Document 1 has been proposed as the floor joint cover device. This configuration comprises a number of support bars whose both ends are pivotally connected to the side walls of adjacent buildings via joints, a number of joint plate support bars supported movably at predetermined intervals on the support bars, a number of pantograph-like expansion links whose both ends are pivotally connected to the side walls of each building and to which each joint plate support bar is pivotally supported, and a number of joint plates that are fixed to each joint plate support bar to cover the joints.

JP 2003-96926 A

In the conventional structure described above, each joint plate is pivotally supported by an expansion link via a joint plate support bar, and the joint plate support bar supports the weight of the joint plate and the weight of people and objects moving on the joint plate. Therefore, the joint plate support bar is required to have the desired strength and rigidity.
In the floor joint cover device, by increasing the number of joint plates, the passage formed by the joint plates can be moved smoothly according to the relative displacement of the two buildings during an earthquake. However, as the number of joint plates increases, the number of joint plate support bars also increases, and the increase in the number of joint plate support bars directly leads to an increase in the weight of the entire device. Therefore, a configuration that can reduce the weight increase due to the joint plate support bars was required.

The present invention proposes a floor joint cover device that can stably support people and objects moving across the joints and can also be made lightweight.

The present invention relates to a floor joint cover device comprising: a connecting base disposed on each side edge of adjacent structures via a joint; an expandable support body formed to be expandable in the joint width direction and having both ends pivotally connected to each connecting base of both structures; and a joint cover body provided with a plurality of cover plates arranged in parallel in the joint width direction and rotatably connected to the expandable support body, the side edges of adjacent cover plates being overlapped so as to be relatively slidable in the joint width direction and the joint longitudinal direction. The joint cover body comprises a central cover plate arranged approximately in the center in the joint width direction, and a plurality of cover plates arranged in parallel in the joint width direction on both sides of the central cover plate on both sides of the central cover plate on both sides of the joint width direction. The floor joint cover device is characterized in that it comprises a flat central horizontal plate portion extending in the longitudinal direction of the joint, and a connecting rod portion having a substantially U-shaped cross section that is provided across the longitudinal direction of the central horizontal plate portion, joined to the underside of the central horizontal plate portion, and pivotally connected directly to the expandable support body, and the side cover plate comprises a flat side horizontal plate portion extending in the longitudinal direction of the joint, and a pivoting leg edge portion that is bent downward from one side edge of the side horizontal plate portion in the joint width direction and extends, and is pivotally connected directly to the expandable support body.

In this configuration, the side cover plate is formed by integrally molding the side horizontal plate portion and the pivot leg edge portion, and is directly pivotally connected to the expandable support body by the pivot leg edge portion, so there is no joint plate support bar in the conventional configuration described above. Therefore, according to the configuration of the present invention, it is possible to reduce the weight compared to the conventional configuration, and when a relatively large number of cover plates are provided, the increase in weight can be suppressed, and the weight reduction effect is greater than that of the conventional configuration. On the other hand, in the configuration of the present invention, the central cover plate is formed by joining the central horizontal plate portion and the connecting rod portion having a substantially U-shaped cross section, and has high strength and rigidity. By arranging the side cover plates on both sides of such a central cover plate, the joint cover body that is inserted across the joint can stably support the weight of people and objects passing over the joint cover body. Therefore, according to the configuration of the present invention, it is possible to stably support people and objects moving over the joint and to reduce the weight compared to the conventional configuration.

In addition, in the configuration of the present invention, the expandable retainer is preferably formed by pivoting multiple link pieces in a pantograph shape so that it can expand and contract in the joint width direction, and both ends are pivotally connected to the respective connecting bases of both buildings.

In the floor joint cover device of the present invention described above, the pivot leg edge of the side cover plate is proposed to have a vertical edge portion connected by bending downward from one side edge in the joint width direction of the side horizontal plate portion, a pivot edge portion connected by bending from the lower edge of the vertical leg portion to one side in the joint width direction and pivoted directly to the expandable holder, and an end edge portion connected by bending upward from one side edge in the joint width direction of the pivot edge portion.

In this configuration, the pivoting edge of the side cover plate has a vertical edge and an end edge on both sides that are pivoted to the expandable support, improving rigidity. This improved rigidity increases the resistance to loads acting on the side cover plate. Therefore, this configuration further improves the aforementioned effect of the present invention, which is to stably support people and objects moving across the joint.

The floor joint cover device of the present invention described above is provided with a telescopic support beam that can expand and contract in the width direction of the joint, with both ends pivotally connected to the connecting bases of both buildings, and the connecting rod portion of the central cover plate and the pivoting leg edge portion of the side cover plate are slidably mounted on the telescopic support beam.

In this configuration, the central cover plate and the side cover plates are supported by the expandable support beam, which can support the weight of people and objects moving across the joint, thereby providing more stable support for the joint cover body.

The floor joint cover device of the present invention can stably support people and objects moving across the joint, and is lighter than the conventional configuration described above. The lighter weight also has the advantage of reducing the workload and costs required for installation.

FIG. 2 is a vertical cross-sectional view showing the installed state of the floor joint cover device 1. FIG. 2 is a plan view showing the installed state of the floor joint cover device 1. FIG. 2 is a perspective view showing the installed state of the floor joint cover device 1. This is a plan view showing the joint cover body 11 omitted. FIG. 1A and 1B are a plan view and a side view, respectively, of an expandable support beam 51. 1A and 1B are a plan view and a side view, respectively, of a middle support beam body 52 that constitutes an expandable support beam 51. FIG. A front view of the middle support beam 52. 1A and 1B are a plan view and a side view, respectively, of a side support beam body 53 constituting an expandable support beam 51. FIG. 10A is a front view of a side support beam 53, and FIG. 10B is a cross-sectional view taken along line S--S in FIG. 7A is a cross-sectional view taken along line TT in FIG. 6, and FIG. 7B is a cross-sectional view taken along line MM in FIG. 1 is a perspective view of a joint cover body 11. FIG. 1A is a cross-sectional view of a central cover plate 12 that constitutes a joint cover body 11, and FIG. 1B is a cross-sectional view of a side cover body 13 that constitutes a joint cover body 11. FIG. FIG. 11 is an explanatory diagram showing the attached state of the side cover plate 13. FIG. 2 is a perspective view showing a portion of the joint cover body 11 cut away. FIG. 13 is an explanatory diagram of the operation of the floor joint cover device 1 when the buildings 81 and 82 are displaced relatively in the direction toward each other. FIG. 10 is an explanatory diagram of the operation of the floor joint cover device 1 when buildings 81, 82 are displaced relative to each other in the left-right direction. FIG.

An embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in Figures 1 to 3, the floor joint cover device 1 is disposed in a joint 83 provided between adjacent buildings 81 and 82 to form a passage connecting the two buildings 81 and 82. The buildings 81 and 82 are each a seismically isolated structure whose lower part is supported by a seismic isolation device (not shown) equipped with a shock absorbing function. The joint 83 is formed with a predetermined width between the buildings 81 and 82, and is capable of absorbing the relative horizontal shaking between the buildings 81 and 82 during an earthquake.

In this embodiment, the longitudinal direction of the joint 83 (longitudinal joint direction) is described as the left-right direction of the floor joint cover device 1. In other words, the left-right direction in this embodiment corresponds to the longitudinal joint direction of the present invention. In addition, the direction from the structures 81, 82 toward the joint 83 is described below as the inward direction, and the direction from the joint 83 toward the structures 81, 82 is described below as the outward direction.

At the side edge of the floor 85 of the building 81 and the side edge of the floor 86 of the building 82, the connecting bases 2, 2 constituting the floor joint cover device 1 are arranged facing each other along the longitudinal direction of the joint 83 and are fixed to each side edge. Here, the side edges of the floors 85, 86 of the buildings 81, 82 are provided with support step edges 91, 92 recessed to a predetermined depth, and the connecting bases 2, 2 are arranged on these support step edges 91, 92. The connecting base 2 has a flat horizontal support edge 21 that covers the upper surface of the support step edges 91, 92, and a vertical edge 22 that is erected in the left-right direction at the outer end of the horizontal support edge 21. Furthermore, an inner edge 23 that extends downward along the wall surface of the buildings 81, 82 that constitute the joint 83 is connected to the inner end of the horizontal support edge 21, and the joint width on the passage connecting the two buildings 81, 82 is determined by the inner edges 23, 23 of the connecting bases 2, 2 arranged on both buildings 81, 82. In this embodiment, the horizontal support edge 21, vertical edge 22, and inner edge 23 that constitute the connecting base 2 are formed by bending steel plates such as stainless steel, and are fixed to the floors 85, 86 of the buildings 81, 82 by anchor bolts (not shown).

As shown in FIG. 4, cylindrical connecting rods 25, 25 are erected facing each other near the vertical edges 22, 22 of the horizontal supports 21, 21 of both structures 81, 82, and a plurality of pairs of connecting rods 25, 25 are provided at a predetermined interval in the left-right direction. Here, in this embodiment, six pairs of connecting rods 25, 25 are respectively arranged in positions that are symmetrical with respect to the center line in the left-right direction. In this embodiment, the connecting rods 25 are composed of a bolt that is fixed to the horizontal support edge 21 and protrudes upward from the horizontal support edge 21, and a cylinder fitted onto the bolt.

As shown in Figure 4, among the pairs of connecting rods 25, 25 provided opposite to each other on both structures 81, 82, the second pair of connecting rods 25, 25 from the right end and the second pair of connecting rods 25, 25 from the left end are each connected to an expandable holder 31 formed by multiple link pieces 33a, 33b pivoted in a pantograph shape. As shown in Figure 5, the expandable holder 31 is configured by multiple connected X-shaped link element parts 32, each of which has two link pieces 33a, 33b pivoted by a screw rod 38. Here, the link element portion 32 is formed by link pieces 33a, 33b crossing each other at their centers and pivotally connected at the centers by the threaded rod 38, and the expandable holder 31 is formed by lining up a plurality of link element portions 32 and pivotally connecting the ends of the link pieces 33a, 33b of adjacent link element portions 32, 32 to each other rotatably by a threaded rod (not shown). Furthermore, the link element portions 32, 32 at both ends are pivotally connected to mounting portions 36, 36 connected to the pair of connecting rods 25, 25 via short link pieces 34a, 34b, respectively. The short link pieces 34a, 34b are approximately half the length of the link pieces 33a, 33b that constitute the link element portion 32, and one end of each is pivotally connected to the mounting portion 36, and the other end of each is pivotally connected to each end of the link pieces 33a, 33b of the link element portion 32. The mounting portion 36 also has a connecting hole 37 formed with a diameter dimension larger than the outer diameter of the connecting rod 25, which penetrates in the vertical direction, and the connecting hole 37 is fitted onto the connecting rod 25. This allows the mounting portion 36 to rotate left and right relative to the connecting rod 25 and tilt up and down.

When the two structures 81, 82 are displaced relative to each other in the joint width direction (width direction of the joint 83), the expandable holder 31 thus arranged can expand and contract in response to the relative displacement (see FIG. 17). When the two structures 81, 82 are displaced relative to each other in the joint length direction, the expandable holder 31 can rotate left and right in response to the relative displacement (see FIG. 18). Furthermore, when the two structures 81, 82 are displaced relative to each other in the height direction, the expandable holder 31 can tilt up and down in response to the relative displacement.

On the other hand, among the multiple pairs of connecting rods 25, 25 provided opposite to both structures 81, 82, the multiple pairs of connecting rods 25, 25 to which the expansion and contraction holder 31 is not pivotally connected are each pivotally connected to an expansion and contraction support beam 51 that can expand and contract in the joint width direction, as shown in FIG. 4. The expansion and contraction support beam 51 is composed of a pair of side support beams 53, 53 pivotally connected to the connecting rods 25, 25 of both structures 81, 82, respectively, and a center support beam 52 supported by the side support beams 53, 53.

As shown in Figures 6 to 8, the middle support beam 52 has a middle beam rod portion 61 having vertical side portions on both the left and right sides that extend along the joint width direction, and a middle roller unit 63 having four middle rotating rollers 64 is provided on one of the left and right side portions at one end of the middle beam rod portion 61, and a middle roller unit 63 is provided on the other of the left and right side portions at the other end of the middle beam rod portion 61. The middle roller unit 63 has four rotating shafts 65 that are attached perpendicularly to the side portions of the middle beam rod portion 61 and are arranged in parallel in the vertical direction and the joint width direction, and the middle rotating rollers 64 are respectively connected to each rotating shaft 65 so that they can rotate freely. The middle rotating rollers 64 have a fitting circumferential groove 64a formed around their outer periphery.

Furthermore, the center support beam 52 has center guide rails 66, each having a pair of upper and lower guide sections 67, 68, fixed to the left and right sides of the center beam rod section 61. The guide sections 67, 68 have horizontal edges 67a, 68a extending to the left or right from the upper and lower ends of the center beam rod section 61, respectively, and mating edges 67b, 68b extending downward or upward from the extending ends of the horizontal edges 67a, 68a, respectively, forming an approximately L-shaped cross section, and the mating edges 67b, 68b are arranged opposite each other with a predetermined gap in the vertical direction. These center guide rails 66 are each provided along the longitudinal direction (joint width direction) of the center beam rod section 61. In this embodiment, the middle guide rail 66 has an upper guide portion 67 disposed above the middle roller unit 63 and a lower guide portion 68 disposed below the middle roller unit 63, with the middle roller unit 63 positioned in the gap between the upper and lower mating edges 67b, 68b.

The upper surface of the center beam section 61 is provided with a pivot rod 59 that protrudes upward at the center in the left-right and longitudinal directions. As described below, this pivot rod 59 is rotatably supported on the center cover plate 12 that constitutes the joint cover body 11 (see FIG. 16).

As shown in Figures 9 and 10, the side support beam body 53 has a side beam rod portion 71 having a vertical side portion on one side that extends along the joint width direction, and a beam mounting portion 72 that is pivotally connected to the connecting rod 25 is provided at one end of the side beam rod portion 71, and a side roller unit 73 having two side rotating rollers 74 is provided at the other end of the side beam rod portion 71 on the side portion of the side beam rod portion 71. A connecting hole 72a formed with a diameter dimension larger than the outer diameter of the connecting rod 25 is formed in the vertical direction through the beam mounting portion 72, and the connecting hole 72a is fitted onto the connecting rod 25. As a result, the beam mounting portion 72 can rotate left and right relative to the connecting rod 25 and can tilt up and down.

The side roller unit 73 has two rotating shafts 75 that are attached perpendicularly to the side of the side beam rod portion 71, arranged in parallel in the vertical direction, and the side rotating rollers 74 are rotatably connected to each rotating shaft 75. The side rotating rollers 74 have a fitting circumferential groove 74a formed around their outer periphery. In this type of side roller unit 73, the fitting edge 67b of the upper guide portion 67 that constitutes the middle guide rail 66 can be fitted into the fitting circumferential groove 74a of the upper side rotating roller 74 so as to be relatively movable, and the fitting edge 68b of the lower guide portion 68 that is paired with the guide portion 67 can be fitted into the fitting circumferential groove 74a of the lower side rotating roller 74 so as to be relatively movable.

Furthermore, the side support beam 53 has a side guide rail 76 having a pair of upper and lower guide portions 77, 78 fixed to the side portion of the side beam rod portion 71. The guide portions 77, 78 have a cross section of a generally L-shape consisting of horizontal edges 77a, 78a extending to the left or right from the upper and lower portions of the side portion of the side beam rod portion 71, respectively, and mating edges 77b, 78b extending downward or upward from the extending ends of the horizontal edges 77a, 78a, respectively, and the mating edges 77b, 78b are arranged opposite each other with a predetermined gap in the vertical direction. Such side guide rails 76 are provided on the side portions of the side beam rod portion 71 in the longitudinal direction (joint width direction) of the side beam rod portion 71, except for the other end where the side roller unit 73 is attached. In this embodiment, the side guide rail 76 is provided so that it can be inserted between the upper and lower guide sections 67, 68 (upper and lower mating edges 67b, 68b) that make up the middle guide rail 66 of the middle support beam 52, and the mating edge 77b of the upper guide section 77 can be relatively movably fitted into the mating circumferential grooves 64a, 64a of the upper two rotating rollers 64, 64 that make up the middle roller unit 63 of the middle support beam 52, and the mating edge 78b of the lower guide section 78 can be relatively movably fitted into the mating circumferential grooves 64a, 64a of the lower two rotating rollers 64, 64 of the middle roller unit 63.

In this embodiment, the side support beam 53 is provided with outer fitting pieces 79, 79 that protrude from the upper and lower ends of the side beam rod portion 71 toward the side portion. The upper and lower outer fitting pieces 79, 79 are formed so that the middle guide rail 66 of the middle support beam 52 can be fitted between them, and are provided along the longitudinal direction (joint width direction) of the side beam rod portion 71. Here, the horizontal edges 67a, 68a of the upper and lower guide portions 77, 78 that constitute the middle guide rail 66 are fitted between the upper and lower outer fitting pieces 79, 79, supporting the middle guide rail 66 in the vertical direction (see FIG. 11).

As shown in Figures 6 and 11, the expandable support beam 51 is formed by connecting the above-mentioned center support beam body 52 and two side support beam bodies 53, 53. That is, on both the left and right sides of the center support beam body 52, the side portions of the center beam rod portion 61 constituting the center support beam body 52 and the side portions of the side beam rod portions 71, 71 constituting the side support beam bodies 53, 53 are respectively opposed to each other, and the center guide rail 66 of the center support beam body 52 is fitted with the side rotating roller 74 of the side support beam body 53, and the center rotating roller 64 of the center support beam body 52 is fitted with the side guide rail 76 of the side support beam body 53. In this way, the telescopic support beam 51 is formed by connecting the middle support beam 52 and the two side support beams 53, 53, and the telescopic support beam 51 is supported by having each side support beam 53, 53 pivotally connected to the connecting bases 2, 2 of both buildings 81, 82 and resting on the horizontal supports 21, 21 of the connecting bases 2, 2 (see Figures 1 and 4). In this telescopic support beam 51, the upper and lower side rotating rollers 74, 74 of the side roller unit 73 are fitted between the upper and lower guide parts 67, 68 of the middle guide rail 66 so as to be relatively movable, and the upper and lower middle rotating rollers 64, 64 of the middle roller unit 63 are fitted between the upper and lower guide parts 77, 78 of the side guide rail 76 so as to be relatively movable, so that the middle support beam 52 and the side support beams 53, 53 can move relatively along the respective guide rails 66, 76, allowing smooth telescopic movement.

As shown in FIG. 4, the telescopic support beam 51 is arranged such that the beam mounting parts 72, 72 of the side support beams 53, 53 are pivotally connected to the connecting bases 2, 2 of both buildings 81, 82, and are rotatable left and right and tiltable up and down. The side support beams 53, 53 are slidably mounted on the horizontal receiving edges 21, 21 of the connecting bases 2, 2, so that the middle support beam 52 is stably supported by the side support beams 53, 53.

As shown in Figures 1 to 3, the floor joint cover device 1 of this embodiment is arranged on the expandable support 31 and expandable support beam 51, spanning between the connecting bases 2, 2 of the two buildings 81, 82, and covering the joint 83.

The joint cover body 11 comprises a central cover plate 12 arranged in the center of the joint width direction, a plurality of side cover plates 13 arranged on both building structures 81, 82 sides of the central cover plate 12, and end cover plates 14 each connected to the vertical edges 22, 22 of the connecting bases 2, 2. The central cover plate 12 is pivotally connected to the central link element part 32 constituting the expandable holder 31, and each side cover plate 13 is pivotally connected to the other link element parts 32 except for the central link element part 32, so that the central cover plate 12 and each side cover plate 13 are arranged side by side in the joint width direction. In this embodiment, the central cover plate 12, side cover plates 13, and end cover plates 14 are formed with the same length dimension in the longitudinal direction of the joint. The central cover plate 12, side cover plates 13, and end cover plates 14 are formed using steel plates such as steel.

12 and 13(A), the central cover plate 12 includes a rectangular flat central horizontal plate portion 41 extending in the longitudinal direction of the joint, and a connecting rod portion 42 welded to the underside of the central horizontal plate portion 41. The connecting rod portion 42 is provided in the center of the central horizontal plate portion 41 in the longitudinal direction of the joint. Here, the connecting rod portion 42 has a cross section that is approximately U-shaped and is formed to the same length as the central horizontal plate portion 41, and is formed to the same length as the central horizontal plate portion 41. The joint edge 42c is welded to the underside of the central horizontal plate 41, and the connecting rod 42 is integrated with the central horizontal plate 41 to form the central cover plate 12. The bottom wall 42b is also provided with a plurality of through holes (not shown) through which the pivot rod 59 of the central support beam 52 constituting the telescopic support beam 51 is rotatably inserted, and a plurality of through holes (not shown) through which the screw rod 38 of the link element 32 located at the center of the telescopic support body 31 is rotatably inserted.

The central cover plate 12 is pivotally connected to the telescopic support beam 51 and the telescopic support body 31 by inserting the pivot rod 59 of the telescopic support beam 51 pivotally connected to the connecting bases 2 and 2 of both buildings 81 and 82 and the screw rod 38 located at the center of the telescopic support body 31 pivotally connected to the connecting bases 2 and 2 into the respective insertion holes of the bottom wall portion 42b and being prevented from coming loose by a nut or the like (see FIG. 16). The bottom wall portion 42b of the connecting rod portion 42 of the central cover plate 12 is slidably mounted on the upper surface of the telescopic support beam 51.

The width dimension (length dimension in the joint width direction) of the central horizontal plate portion 41 is set to a predetermined dimension that is longer than twice the screw rod spacing between adjacent link element portions 32 of the expandable retainer 31 in the normal state. As a result, when the central cover plate 12 is pivotally connected to the central link element portion 32, both side edges of the central horizontal plate portion 41 cover and overlap the inner portions of each of the side cover plates 13 that are respectively pivotally connected to the adjacent link element portions 32 on both sides (see Figure 1).

As shown in Figures 12, 13(B) and 14, the side cover plate 13 has a rectangular flat side horizontal plate portion 43 extending in the longitudinal direction of the joint, and a pivot leg edge portion 44 extending downward from the inner edge of the side horizontal plate portion 43, and is formed by bending a single steel plate. The side horizontal plate portion 43 is formed with the same length as the central horizontal plate portion 41, and the pivot leg edge portion 44 is composed of a vertical edge portion 44a connected by bending downward from the inner edge of the side horizontal plate portion 43, a pivot edge portion 44b connected by bending sideways from the lower edge of the vertical edge portion 44a, and an end edge portion 44c connected by bending upward from the inner edge of the pivot edge portion 44b. The pivot edge portion 44b is formed with a plurality of insertion holes (not shown) through which the screw rods 38 of the link element portions 32 constituting the expandable holder 31 are rotatably inserted. The screw rods 38 of the expandable holders 31 pivotally connected to the connecting bases 2, 2 of both buildings 81, 82 are inserted into the respective insertion holes of the pivot leg edge portion 44 of the side cover plate 13, and the side cover plate 13 is rotatably connected to the expandable holder 31 by being prevented from coming off by a nut or the like. The pivot edge portion 44b of the pivot leg edge portion 44 of the side cover plate 13 is slidably mounted on the upper surface of the expandable support beam 51 pivotally connected to the connecting bases 2, 2. In this embodiment, the inner edge of the side horizontal plate portion 43 corresponds to one side edge in the joint width direction of the side horizontal plate portion according to the present invention, and the inner edge of the pivot edge portion 44b corresponds to one side edge in the joint width direction of the pivot edge portion according to the present invention.

As shown in Figures 15 and 16, the side cover plate 13 is arranged with the pivot leg edge 44 facing inward (the central cover plate 12 side) and is pivotally connected to the screw rod 38 of the link element portion 32 constituting the expandable support body 31. In this embodiment, the total number of the central cover plate 12 and the multiple side cover plates 13 arranged on both sides of it is the same number as the multiple link element portions 32 constituting the expandable support body 31, and the side cover plates 13 are pivotally connected to the screw rod 38 of each link element portion 32 except for the central link element portion 32. Each side cover plate 13 is pivotally connected to the expandable support body 31 and rests on the expandable support beam 51, and the inner side horizontal plate portion 43 rests on the upper surface of the outer side horizontal plate portion 43 as described later (see Figure 1). Therefore, the height dimension of the vertical edge 44a of the pivot leg edge 44 of each side cover plate 13 gradually decreases from the inside to the outside.

The width of the side horizontal plate portion 43 is set to a predetermined dimension that is longer than the screw rod spacing between adjacent link element portions 32 of the expandable holder 31 in the normal state. As a result, when the side cover plate 13 is pivotally connected to the link element portion 32, the outer edge of the side horizontal plate portion 43 overlaps and covers the inner portion of the side cover plate 13 arranged adjacent to the outer side (see Figure 1).

The end cover plate 14 is attached to the upper end of the vertical edge 22 of the connecting base 2 (see FIG. 1), and as shown in FIG. 12, has an end horizontal plate portion 45 in the form of a rectangular flat plate and a leg edge portion 46 with a cross section of an approximately L-shaped shape extending downward from the inner edge of the end horizontal plate portion 45, and the end horizontal plate portion 45 and the leg edge portion 46 are formed by bending a single steel plate. The end horizontal plate portion 45 is formed with the same length dimension as the central horizontal plate portion 41 and the side horizontal plate portion 43. The leg edge portion 46 of such an end cover plate 14 is slidably placed on the upper surface of the expandable support beam 51 connected to the connecting base 2. The inner part of the end cover plate 14 is covered by the outer edge of the side horizontal plate portion 43 of the side cover plate 13 arranged next to it on the inside, and overlaps with the side horizontal plate portion 43. In addition, in this embodiment, the end cover plate 14 has a reinforcing rod 47 attached to the underside of the end horizontal plate portion 45, and this reinforcing rod 47 provides high strength and rigidity.

In this way, as shown in Figures 15 and 16, the joint cover body 11 has a central cover plate 12 and a plurality of side cover plates 13 pivotally connected to each link element portion 32 of the expandable support body 31 and arranged in parallel in the joint width direction, forming a passage that spans the joint 83. Then, between the adjacent cover plates 12 to 14 from the end cover plate 14 arranged at the outermost position to the central cover plate 12, the outer edge portions of the inner cover plates 12, 13 cover and overlap the inner portions of the outer cover plates 13, 14. As a result, the end horizontal plate portion 45 of the end cover plate 14, the side horizontal plate portion 43 of each side cover plate 13, and the central horizontal plate portion 41 of the central cover plate 12 overlap in a stepped manner, with the central horizontal plate portion 41 being at the highest position (see Figure 1). Then, the leg edge portion 46 of the end cover plate 14 and the pivot leg edge portion 44 of each side cover plate 13 are covered and are not exposed on the joint.

Next, the operation of the floor joint covering device 1 of this embodiment will be described.
As shown in Figure 17, when the two structures 81, 82 are displaced relative to each other in the direction toward each other during an earthquake, the telescopic support beams 51 and the telescopic holders 31 contract, and the side cover plates 13 pivotally connected to the link element parts 32 of the telescopic holders 31 move toward the center cover plate 12, causing the joint cover body 11 to contract. Here, the telescopic support beams 51 and the telescopic holders 31 can smoothly expand and contract, so that the joint cover body 11 can smoothly follow the relative displacement of the two structures 81, 82 in the direction toward each other caused by an earthquake. In this way, the center cover plate 12 and the side cover plates 13 slide in conjunction with the contraction of the telescopic holder 31, so that the joint cover body 11 can smoothly contract in response to the relative displacement of the two structures 81, 82 in the direction toward each other.

In addition, if the two structures 81, 82 are displaced relative to each other in the direction away from each other during an earthquake (not shown), the telescopic support beams 51 and the telescopic holders 31 expand, and as the telescopic holders 31 expand, the side cover plates 13 move outward from the joint, causing the joint cover body 11 to expand. Even when there is a relative displacement in the direction away from each other in this way, the telescopic support beams 51 and the telescopic holders 31 expand smoothly, allowing them to smoothly follow the relative displacement. Then, the central cover plate 12 and the side cover plates 13 slide against each other, allowing the joint cover body 11 to expand smoothly in response to the relative displacement in the direction away from each other.

On the other hand, as shown in Figure 18, when the two structures 81, 82 are displaced relative to each other in the left-right direction (longitudinal direction of the joint) during an earthquake, each of the expandable support beams 51 and each of the expandable holders 31 tilts left-right and expands with the tilt. Here, each of the expandable support beams 51 and each of the expandable holders 31 can smoothly expand and contract, and are pivotally connected to the connecting bases 2, 2 (a pair of connecting rods 25, 25) fixed to the two structures 81, 82, so that they can smoothly follow the relative displacement of the two structures 81, 82 in the left-right direction caused by an earthquake. Then, as the expandable holder 31 tilts, the center cover plate 12 and each of the side cover plates 13 move left-right, and the joint cover body 11 tilts. In this way, the center cover plate 12 and each side cover plate 13 slide in conjunction with the expandable holder 31, allowing the joint cover body 11 to tilt smoothly in response to the relative left-right displacement of the two structures 81, 82.

Furthermore, if the two structures 81, 82 are displaced relative to each other in the vertical direction during an earthquake (not shown), each of the telescopic support beams 51 and each of the telescopic holders 31 will tilt and extend in the vertical direction. As each of the telescopic holders 31 extends, the joint cover body 11 will extend. Here, the telescopic support beams 51 and the telescopic holders 31 are pivotally connected at both ends to the connecting bases 2, 2 (a pair of connecting rods 25, 25) fixed to the two structures 81, 82 so that they can tilt in the vertical direction, and therefore can smoothly follow the relative displacement of the two structures 81, 82 in the vertical direction.

As described above, in the floor joint cover device 1 of this embodiment, when the two structures 81, 82 are displaced relative to each other during an earthquake, the telescopic support beam 51 and the telescopic holder 31 expand and contract and tilt in response to the relative displacement, and the central cover plate 12 and the side cover plates 13 slide in response to this, allowing the joint cover body 11 to expand and contract and tilt smoothly. In particular, since the configuration of this embodiment is such that multiple side cover plates 13 are disposed on both outer sides of the central cover plate 12, the joint cover body 11 can expand and contract and tilt even more smoothly in response to the relative displacement.

In the side cover plate 13 of this embodiment, the pivoting edge 44 integrally formed with the side horizontal plate 43 is directly pivoted to the link element 32 of the telescopic support body 31 and directly rests on the telescopic support beam 51. That is, the configuration of this embodiment does not have a joint plate support bar interposed between the joint plate and the telescopic link as in the conventional configuration described above, and can reduce the weight of the joint plate support bar. In addition, in the configuration of this embodiment, which has multiple side cover plates 13, the weight increase caused by the increase in the number of side cover plates 13 can be suppressed, so that the weight can be reduced and the weight reduction effect is high compared to the conventional configuration. Here, the pivoting edge 44 of the side cover plate 13 is composed of a vertical edge 44a, a pivoting edge 44b, and an end edge 44c, and the strength and rigidity are improved by the shape effect. In particular, the end edge 44c provides high rigidity, and this high rigidity improves the resistance to the load applied to the side cover plate 13. For this reason, even if the configuration does not have the support bar of the conventional configuration, it is possible to adequately support the weight of people or objects moving on the joint cover body 11.
Furthermore, the central cover plate 12 has a relatively high strength and rigidity as a structure in which the central horizontal plate portion 41 and the connecting rod portion 42 having a generally U-shaped cross section are joined together. By providing the side cover plates 13 on both outer sides of the central cover plate 12, the weight of people and objects passing over the joint cover body 11 can be stably supported.

In addition, in the configuration of this embodiment, the pivot leg edge 44 of the side cover plate 13 is covered by the central horizontal plate portion 41 of the central cover plate 12 or the side horizontal plate portion 43 of the side cover plate 13 adjacent to it on the inside of each. This not only makes it easier for people and objects to move over the joint cover body 11, but also prevents sand, dirt, etc. from accumulating on the pivot leg edge 44, thereby preventing the sand, dirt, etc. from interfering with the relative sliding between the expandable holder 31 and the side cover plate 13.

In addition, the configuration of this embodiment contributes to smooth expansion and contraction and tilting of the joint cover body 11 by the smooth expansion and contraction of the expandable support beam 51 supporting the center cover plate 12 and the side cover plate 13. Here, the expandable support beam 51 is configured such that the middle rotating roller 64 of the middle support beam body 52 and the side guide rail 76 of the side support beam body 53 are fitted together so as to be relatively movable, and the middle guide rail 66 of the middle support beam body 52 and the side rotating roller 74 of the side support beam body 53 are fitted together so as to be relatively movable, so that the middle support beam body 52 and the side support beams 53, 53 move relatively along the guide rails 66, 76, thereby enabling smooth expansion and contraction. Furthermore, in this embodiment, the upper and lower middle rotating rollers 64, 64 arranged on the middle support beam 52 are fitted between the upper and lower guide parts 77, 78 of the side guide rail 76 arranged on the side support beam 53 so as to be relatively movable, and the upper and lower side rotating rollers 74, 74 arranged on the side support beam 53 are fitted between the upper and lower guide parts 67, 68 of the middle guide rail 66 arranged on the middle support beam 52 so as to be relatively movable, so that in the event of an earthquake, these fitted states are stably maintained, and the telescopic operation can be stably and smoothly performed. For this reason, the telescopic support beam 51 of this embodiment can stably follow the relative displacement of the two buildings 81, 82 by smoothly telescopically expanding and contracting in accordance with the relative displacement of the two buildings 81, 82.
Furthermore, in the configuration of this embodiment, the side support beams 53, 53 of the expandable support beam 51 are supported by the horizontal supports 21, 21 fixed to both buildings 81, 82, and the side support beams 53, 53 support the middle support beam 52, so that the middle support beam 52 arranged on the joint 83 can be stably supported. As a result, the joint cover body 11 can be firmly supported, and high strength and rigidity can be exhibited to stably support the load of people and objects passing over the joint cover body 11.

The present invention is not limited to the above-described embodiment, and can be modified as appropriate within the scope of the present invention.
For example, the number of side cover plates 13 constituting the joint cover body 11 can be appropriately changed and set. In other words, it is preferable to appropriately change the setting depending on the installation location of the floor joint cover device 1, the width of the passage, the number of the expandable support beams 51 and the expandable holders 31, etc.

In addition, in the above-mentioned embodiment, the pivot leg edge 44 of the side cover plate 13 is composed of a vertical edge 44a, a pivot edge 44b, and an end edge 44c, but this is not limited thereto, and the pivot leg edge may be composed of, for example, a vertical edge and a pivot edge.

In the above embodiment, the middle roller unit 63 having four middle rollers 64 is disposed on the middle support beam 52 of the expandable support beam 51, but the number of middle rollers in the middle roller unit can be changed as appropriate. For example, the middle roller unit may have two middle rollers 64, 64 arranged vertically. Furthermore, the middle support beam 52 may have one middle roller on each of its two side surfaces.
Similarly, in the configuration, the side roller unit 73 having two side rollers 74 is disposed on the side support beam 53, but the number of side rollers can be changed as appropriate. For example, a configuration in which a side roller unit having four side rollers is disposed, or a configuration in which one side roller is disposed, etc., are possible.

In the above-mentioned embodiment, the connecting base 2 has a horizontal support edge 21 on which both ends of the telescopic support beam 51 are slidably mounted, but this is not limited thereto. For example, the connecting base may only pivotally connect both ends of the telescopic support beam 51, but may not support both ends of the telescopic support beam 51 (do not have a horizontal support edge).

REFERENCE SIGNS LIST 1 Floor joint cover device 2 Connecting base 11 Joint cover body 12 Central cover plate 13 Side cover plate 14 End cover plate 21 Horizontal support edge 22 Vertical edge 23 Inner edge 25 Connecting rod 31 Expandable support body 32 Link element portion 33a, 33b Link piece 34a, 34b Short link piece 36 Mounting portion 37 Connecting hole 38 Screw rod 41 Central horizontal plate portion 42 Connecting rod portion 42a Side wall portion 42b Bottom wall portion 42c Joint edge portion 43 Side horizontal plate portion 44 Pivot leg edge portion 44a Vertical edge portion 44b Pivot edge portion 44c End edge portion 45 End horizontal plate portion 46 Leg edge portion 47 Reinforcement rod 51 Expandable support beam [0033] 52 Center support beam 53 Side support beam 59 Pivot rod 61 Center beam rod portion 63 Center roller unit 64 Center rotating roller 64a Engagement circumferential groove 65 Pivot shaft 66 Center guide rail 67, 68 Guide portion 67a, 68a Horizontal edge 67b, 68b Engagement edge 71 Side beam rod portion 72 Beam mounting portion 72a Connection hole 73 Side roller unit 74 Side rotating roller 74a Engagement circumferential groove 75 Pivot shaft 76 Side guide rail 77, 78 Guide portion 77a, 78a Horizontal edge 77b, 78b Engagement edge 79 Outer fitting piece portion 81, 82 Building structure 83 Joint 85, 86 Floor 91, 92 Support step edge

Claims (2)

A connecting base is provided on each side edge of adjacent buildings via a joint;
A stretchable support body that is stretchable in the joint width direction and has both ends pivotally connected to the respective connecting bases of the two buildings;
A floor joint cover device comprising a plurality of cover plates arranged in parallel in the joint width direction and rotatably connected to the expandable support body, and a joint cover body in which side edges of adjacent cover plates are overlapped so as to be relatively slidable in the joint width direction and the joint longitudinal direction,
The joint cover body is
The joint width direction of the joint is provided with a central cover plate disposed at approximately the center of the joint width direction, and a plurality of side cover plates disposed in parallel on both building sides of the central cover plate in the joint width direction,
The central cover plate is
A flat central horizontal plate portion extending in the longitudinal direction of the joint;
a connecting rod portion having a substantially U-shaped cross section, which is provided along the longitudinal direction of the central horizontal plate portion, joined to the lower surface of the central horizontal plate portion, and pivotally connected directly to the expandable holder;
The side cover plate includes:
A flat horizontal plate portion extending in the longitudinal direction of the joint;
The horizontal plate portion has a pivot edge portion which is bent downward from one side edge in the joint width direction and is directly pivotally connected to the expandable support body,
The pivoting edge of the side cover plate is
A vertical edge portion bent downward from one side edge in the joint width direction of the side horizontal plate portion,
A pivot edge portion is bent from the lower edge of the vertical edge portion toward one side in the joint width direction and is directly pivotally connected to the expansion and contraction support body;
An end edge portion which is bent upward from one side edge in the joint width direction of the pivot edge portion and is connected to the joint width direction.
A floor joint cover device comprising : The structure is provided with a telescopic support beam whose both ends are pivotally connected to the respective connecting bases of the two buildings and which can be expanded and contracted in the joint width direction.
2. The floor joint cover device according to claim 1 , wherein the connecting rod portion of the center cover plate and the pivot leg edge portion of the side cover plate are slidably mounted on the telescopic support beam.

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