JP7563751B2 - Joint cover device - Google Patents

Description

The present invention relates to a joint cover device that covers joints between 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. Joints that can absorb displacement caused by earthquakes are formed between buildings with such seismic isolation structures, and joint cover devices are installed to cover these joints.

For example, Patent Document 1 proposes a joint cover device that covers the joints between the walls of adjacent buildings. In this configuration, multiple pantograph-like telescopic arms, both ends of which are pivotally supported on the side walls of both buildings, are arranged in the longitudinal direction of the joint, and multiple cover plates are rotatably connected to multiple pivot points provided on the telescopic arms, so that the cover plates are arranged to be slidable relative to each other. In this configuration, when the two buildings are displaced relative to each other during an earthquake, the telescopic arms expand and contract, and the cover plates slide in accordance with the expansion and contraction, allowing them to follow the relative displacement.

Patent No. 3028507

In the above-mentioned configuration, in which multiple cover plates are slid to follow the relative displacement of the two structures, it is possible to more smoothly follow the relative displacement by increasing the number of cover plates. When increasing the number of cover plates, it is necessary to increase the number of pivot parts of the telescopic arm accordingly. Here, as the number of pivot parts increases, the spacing between adjacent pivot parts becomes narrower, so the pantograph-shaped elements that make up the telescopic arm tend to become smaller. However, when the elements become smaller, there is a risk that the support stability of the cover plates will decrease. For this reason, there has been a demand for a configuration equipped with a telescopic arm that can sufficiently maintain the support stability of each cover plate even if the number of cover plates is increased.

The present invention proposes a joint cover device that allows the cover plates to smoothly follow the relative displacement of the two structures and improves the support stability of each cover plate.

The present invention relates to a joint cover device comprising a connecting base disposed on each side edge of adjacent structures via a joint, a joint cover body having a plurality of cover plates arranged side by side across the joint in the width direction of the joint, and a plurality of expandable retainers formed to be expandable in the width direction of the joint, both ends of which are pivotally connected to the connecting bases of both structures, and each cover plate of the joint cover body is rotatably connected, the expandable retainers being formed in a pantograph shape by arranging a plurality of first link element parts, each of which has a pair of first link pieces pivotally connected to each other in the width direction of the joint, and pivoting the ends of adjacent first link pieces to each other, and the pair of first link pieces of each first link element part are pivotally connected The joint cover device is characterized in that it comprises a first telescopic link body to which each cover plate of the joint cover body is pivotally supported by a first central pivot part, and a second telescopic link body formed in a pantograph shape by arranging a plurality of second link element parts, each of which is a pair of second link pieces longer than the first link piece and pivotally connecting the ends of adjacent second link pieces, in the width direction of the joint and disposed closer to the surface or the depth of the joint than the first telescopic link body, and the first central pivot part of the first telescopic link body is pivotally supported by a second central pivot part to which a pair of second link pieces constituting each second link element part of the second telescopic link body are pivotally connected at intervals of a predetermined number of pieces.

In this configuration, the second central pivot part of the second telescopic link body, which is made of a long second link piece, is pivoted to the first central pivot part of the first telescopic link body to which each cover plate of the joint cover body is connected, which is located at every predetermined number of first central pivot parts. Therefore, the second telescopic link body can suppress the shaking (fluttering, etc.) and vibration caused by external factors in the first telescopic link body. Here, since the second telescopic link body is composed of second link element parts that are larger than the first link element parts, the shaking and vibration caused by the external factors are suppressed compared to the first telescopic link body. As a result, the second telescopic link body can suppress the shaking and vibration of the first telescopic link body caused by wind (external factors) acting through the joint cover body. And, because the shaking and vibration are suppressed by the second telescopic link body, the first telescopic link body can stably expand and contract when the two buildings are displaced relative to each other during an earthquake, and the operational stability of the first telescopic link body can be improved. Therefore, according to the configuration of the present invention, the support stability of the joint cover body can be improved, so that the joint cover body can be stably supported even in a configuration in which the number of cover plates is increased.

In the joint cover device of the present invention described above, the first telescopic link body is configured such that a first disk-shaped intermediate body having an outer diameter larger than the width dimension of the first link piece is slidably interposed between each of the pivotally connected first link pieces, and the second telescopic link body is configured such that a second disk-shaped intermediate body having an outer diameter larger than the width dimension of the second link piece is slidably interposed between each of the pivotally connected second link pieces.

In this configuration, the first intermediate body can suppress the shaking (fluttering, rattling, etc.) that occurs between the pivotally connected first link pieces, so the shaking and vibration of the first telescopic link body as a whole can be effectively suppressed. Therefore, the support stability of the joint cover body by the first telescopic link body can be improved, and the first telescopic link body can operate smoothly and stably. Furthermore, the second intermediate body can suppress the shaking (fluttering, rattling, etc.) that occurs between the pivotally connected second link pieces, so the shaking and vibration of the second telescopic link body as a whole can be effectively suppressed, and the second telescopic link body can operate smoothly and stably. This further improves the support stability of the joint cover body by the first telescopic link body, and further improves the effect of allowing the first telescopic link body to operate smoothly and stably.

Here, it is preferable that the outer diameter of the first intermediate body is in the range from the width dimension of the first link piece to three times that width dimension. This is based on the cost-effectiveness of the action effect of suppressing the shaking by increasing the width dimension and the increased material cost by increasing the outer diameter. Furthermore, since increasing the outer diameter may cause the first intermediate bodies to come into contact with each other when expanding or contracting, it is preferable to set an upper limit on the outer diameter to prevent this. Similarly, it is preferable that the outer diameter of the second intermediate body is in the range from the width dimension of the second link piece to three times that width dimension.

As described above, the joint cover device of the present invention can improve the support stability of the joint cover body, so even if the number of cover plates is increased in order to improve the followability to the relative displacement of the two structures, the joint cover body can be stably supported, so that both the improved followability and support stability can be achieved.

FIG. 2 is a plan view showing the installed state of the joint covering device 1. FIG. 2 is a front view showing the installed state of the joint covering device 1. 2 is a perspective view of a joint cover body 21. FIG. A front view showing the joint cover body 21 omitted. 2A and 2B are a plan view and a front view, respectively, of an expandable holder 7. FIG. FIG. FIG. 3A is a front view of a first telescopic link body 31, and FIG. 3B is a front view of a second telescopic link body 51. 2 is an exploded perspective view of a first link element portion 32 that constitutes a first telescopic link body 31. FIG. 13 is an exploded perspective view of a second link element portion 52 that constitutes a second telescopic link body 51. FIG. 13 is an explanatory diagram of the operation of the joint covering device 1 when the buildings 81 and 82 are displaced relative to each other in the separating direction. FIG. 13 is an explanatory diagram of the operation of the joint covering device 1 when buildings 81, 82 are displaced relative to each other in the vertical direction. FIG.

An embodiment of the present invention will be described with reference to the accompanying drawings.
The joint cover device 1 of this embodiment is a so-called wall joint cover device, and as shown in Figures 1 and 2, it is disposed between adjacent left and right buildings 81 and 82 via a joint 83, and covers the joint 83 between the side wall surfaces 85 and 86 of both 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) 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 width direction of the joint 83 will be described as the left-right direction. Also, in the depth direction of the joint 83 (hereinafter also referred to as the front-back direction), the front side of the joint 83 will be described as the front side, and the opposite side will be described as the back side. That is, in the joint cover device 1 of this embodiment, the joint cover body 21 side described below is the front side, and the expandable holder 7 side is the back side.

Left and right connecting bases 2, 2 constituting the joint cover device 1 are disposed on the opposing side wall surfaces 85, 86 of the buildings 81, 82, respectively. The connecting base 2 includes a fixed frame 11 with an L-shaped cross section extending in the vertical direction, a bracket 13 pivotally connected to the fixed frame 11 via a hinge 12 so as to be rotatable in the front-to-back direction, and a mounting bracket 15 firmly connected to the bracket 13. Here, the fixed frame 11 is firmly fixed to the side wall surfaces 85, 86 by anchor bolts (not shown). A plurality of hinges 12 are disposed at predetermined intervals in the vertical direction.
A pair of mounting brackets 15, 15 are fixed to the left and right brackets 13, 13 at the same height in an opposing relationship, and two pairs of mounting brackets 15, 15 are arranged at a distance above and below (see Fig. 4). Here, the mounting bracket 15 is roughly U-shaped in plan view and is composed of a connecting portion along the joint depth direction and a pair of support plates joined to both ends of the connecting rod, and both support plates have insertion holes (not shown) opened (see Fig. 6).

As shown in FIG. 4, a number of expandable holders 7 are stretched across the left and right connecting bases 2, 2. The expandable holders 7 are pivotally connected at both ends to the pair of mounting brackets 15, 15 so as to be rotatable in the vertical direction, and are stretched across the left and right connecting bases 2, 2. As shown in FIG. 1 and FIG. 4 to FIG. 6, the expandable holders 7 are composed of a first expandable link body 31 and a second expandable link body 51 arranged side by side in the depth direction of the joint 83, and the second expandable link body 51 is disposed behind the first expandable link body 31.

As shown in Fig. 8(B) and Fig. 10, the second telescopic link body 51 is formed by connecting a plurality of second link pieces 53 in a pantograph shape, and has a configuration in which a plurality of X-shaped second link element parts 52 are connected by connecting two second link pieces 53, 53 with a screw rod 41. Here, the second link element part 52 is formed by connecting the second link pieces 53, 53 with their centers crossed with each other in a manner that allows them to rotate at the center by the screw rod 41. The second telescopic link body 51 is formed in a pantograph shape by arranging a plurality (three pieces) of second link element parts 52 in the left-right direction and connecting the ends of the second link pieces 53, 53 of adjacent second link element parts 52, 52 in a manner that allows them to rotate by the screw rod 42. Furthermore, the second link element parts 52, 52 at both ends have a pair of second short link pieces 54, 54 whose one ends are pivotally connected to each other by a screw rod 43 at the other end thereof, which are pivotally connected to the end of the second link piece 53, 53 constituting the second link element parts 52, 52, respectively. The pair of second short link pieces 54, 54 are pivotally connected to the mounting bracket 15 by the screw rod 43 which pivotally connects the one end of the pair of second short link pieces 54, 54. In this way, the second telescopic link body 51 is pivotally connected to the left and right connecting bases 2, 2 by having both ends (one end of the second short link pieces 54, 54) pivotally connected to the mounting bracket 15 by the screw rod 43. In this embodiment, the center part of the second link pieces 53, 53 of each second link element part 52 pivotally connected by the screw rod 41 corresponds to the second center pivot part according to the present invention.

As shown in Figs. 8(A) and 9, the first telescopic link body 31 is formed by connecting a plurality of first link pieces 33, each of which is shorter than the second link piece 53, in a pantograph shape. In other words, the first link element portion 32 is connected in an X shape, with two first link pieces 33, 33 pivoted by the screw rod 41 or screw rod 45. Here, the first link element portion 32 is formed by connecting the first link pieces 33, 33, each of which has its center portion crossed with each other, pivotally connected at the center portion by the screw rod 41, 45. The first telescopic link body 31 is formed in a pantograph shape by arranging a plurality (11 pieces) of first link element portions 32 in the left-right direction and connecting the ends of the first link pieces 33, 33 of adjacent first link element portions 32, 32 to each other pivotally by the screw rod 46. Furthermore, the first link element parts 32, 32 at both ends have a pair of first short link pieces 34, 34 whose one ends are pivotally connected to each other by the screw rod 43 at the other end thereof, which is pivotally connected by the screw rod 45 to the ends of the first link pieces 33, 33 constituting the first link element parts 32, 32. The pair of first short link pieces 34, 34 are pivotally connected to the mounting bracket 15 by the screw rod 43 that pivotally connects the one ends of the pair of first short link pieces 34, 34. In this manner, the first telescopic link body 31 is pivotally connected to the left and right connecting bases 2, 2 by having both ends (one end of the first short link pieces 34, 34) pivotally connected to the mounting bracket 15 by the screw rod 43. In this embodiment, the central parts of the first link pieces 33, 33 of each first link element part 32 pivotally connected by the screw rods 41, 45 correspond to the first central pivot part according to the present invention.

7, the first link element parts 32 constituting the first telescopic link body 31 are pivotally connected by the screw rod 41 that pivotally connects the second link pieces 53, 53 of the second link element part 52 every two of them. The other first link element parts 32 have their first link pieces 33, 33 pivotally connected by the screw rod 45. The first short link pieces 34, 34 arranged at both ends of the first telescopic link body 31 are pivotally connected to the mounting brackets 15, 15 by the screw rod 43 that pivotally connects the one ends of the second short link pieces 54, 54 arranged at both ends of the second telescopic link body 51 (see FIG. 6). That is, the first telescopic link body 31 and the second telescopic link body 51 are pivotally connected at both ends to the mounting brackets 15, 15 by screw rods 43, 43, and are spanned between the left and right mounting brackets 15, 15.

The screw rod 41 pivotally connects the first link pieces 33, 33 of the first link element portion 32 and the second link pieces 53, 53 of the second link element portion 52, and is therefore longer than the screw rod 45 that pivots the other first link pieces 33, 33. Similarly, the screw rod 43 that pivotally connects both ends of the first telescopic link body 31 and both ends of the second telescopic link body 51 to the mounting bracket 15 is longer than the screw rod 45. In addition, the screw rod 46 that pivotally connects the ends of the first link pieces 33, 33 and the screw rod 42 that pivotally connects the ends of the second link pieces 53, 53 are relatively short, and shorter than the screw rods 41, 43 described above. These threaded rods 41-43, 45, 46 are inserted into insertion holes (not shown) that are opened in each of the link pieces 33, 34, 53, 54 and the mounting bracket 15, and nuts (not shown) are screwed into them, so that each of the link pieces 33, 53 is held in a pivoted state so that it can rotate freely.

8(A) and 9, a disk-shaped first intermediate body 36 is interposed between the central portions of the first link pieces 33, 33 pivotally connected by the screw rods 41, 45 in the first link element portion 32. The first intermediate body 36 is formed with an outer diameter dimension larger than the width dimension of the first link piece 33, and has an insertion hole (not shown) in the central portion through which the screw rod can be inserted. Furthermore, the same first intermediate body 36 is interposed between the ends of the first link pieces 33, 33 of adjacent first link element portions 32, 32, between the end of the first link piece 33 and the end of the first short link piece 34, and between the ends of the first short link pieces 34, 34. By installing the first intermediate body 36 in this manner, the pivotally connected first link pieces 33, 33 are in slidable contact with the front and back surfaces of the first intermediate body 36, the pivotally connected first link piece 33 and the first short link piece 34 are in slidable contact with the front and back surfaces of the first intermediate body 36, and the pivotally connected first short link pieces 34, 34 are in slidable contact with the front and back surfaces of the first intermediate body 36.

Similarly, in the second link element portion 52, as shown in Fig. 8(B) and Fig. 10, a disk-shaped second intermediate body 56 is interposed between the central portions of the second link pieces 53, 53 pivoted by the screw rod 41. This second intermediate body 56 is formed with an outer diameter dimension larger than the width dimension of the second link piece 53, and an insertion hole (not shown) through which the screw rod can be inserted is opened in the central portion. Furthermore, the same second intermediate body 56 is interposed between the ends of the second link pieces 53, 53 of adjacent second link element portions 52, 52, between the end of the second link piece 53 and the end of the second short link piece 54, and between the ends of the second short link pieces 54, 54. By installing the second intermediate body 56 in this manner, the pivotally connected second link pieces 53, 53 are in slidable contact with the front and back surfaces of the second intermediate body 56, the pivotally connected second link piece 53 and second short link piece 54 are in slidable contact with the front and back surfaces of the second intermediate body 56, and the pivotally connected second short link pieces 54, 54 are in slidable contact with the front and back surfaces of the second intermediate body 56.

In this embodiment, the first link piece 33 and the first short link piece 34 are formed of steel square pipes having the same cross-sectional shape, and the first intermediate body 36 is formed with an outer diameter larger than the width of the opposing surfaces of the pivotally connected link pieces 33, 34. The outer diameter of the first intermediate body 36 is approximately twice the width of the opposing surfaces of the first link piece 33 (and the first short link piece 34). Meanwhile, the second link piece 53 and the second short link piece 54 are formed of steel square pipes having a cross-sectional size larger than that of the first link piece 33, and the second intermediate body 56 is formed with an outer diameter larger than the width of the opposing surfaces of the pivotally connected link pieces 53, 54. The outer diameter of the second intermediate body 56 is approximately twice the width of the opposing surfaces of the second link piece 53 (and the second short link piece 54).
Furthermore, the length dimensions of the first link piece 33 and the second link piece 53 are set so that every third first link element portion 32 and each second link element portion 52 can be pivotally connected by the threaded rod 41 as described above, and so that in a normal state (when there is no earthquake), the vertical width of the second link element portion 52 is wider than the vertical width of the first link element portion 32. The first short link piece 34 and the second short link piece 54 are set according to the length dimensions of the first link piece 33 and the second link piece 53 thus set.

In this way, the telescopic holder 7 is composed of the first telescopic link body 31 and the second telescopic link body 51 arranged side by side in the depth direction of the joint 83, and every third first link element portion 32 constituting the first telescopic link body 31 is pivotally connected to the second link element portion 52 of the second telescopic link body 51 by a screw rod 41, and both ends of the first telescopic link body 31 and both ends of the second telescopic link body 51 are pivotally connected to the left and right mounting brackets 15, 15 by screw rods 43, 43. Therefore, the first telescopic link body 31 and the second telescopic link body 51 telescopically and rotate integrally due to the relative displacement of the two buildings 81, 82.
Here, in the first telescopic link body 31, every two first link element parts 32 are pivotally supported by the screw rod 41 to the second link element parts 52 having a larger vertical width than the first link element parts 32, so that the second link element parts 52 can suppress the swaying (fluttering) and vibration of the first telescopic link body 31 that may be caused by wind or the like. Furthermore, the first intermediate body 36 is interposed between each link piece 33, 34 constituting the first telescopic link body 31, so that the swaying and vibration generated in the first telescopic link body 31 can also be suppressed. Similarly, the second telescopic link body 51 can suppress the swaying and vibration generated in the second telescopic link body 51 by interposing the second intermediate body 56 between each link piece 53, 54. As a result, the swaying and vibration of the telescopic holder 7 as a whole can be further suppressed. This allows the first telescopic link body 31 and the second telescopic link body 51 to smoothly telescopically operate, so that when the two buildings 81, 82 are displaced relative to each other during an earthquake, the link body can smoothly follow the relative displacement.

As shown in FIG. 4, a plurality of support rods 29 extending in the vertical direction are stretched across the two telescopic holders 7, 7 arranged at a distance from each other in the vertical direction, and each support rod 29 is rotatably connected to the screw rods 41, 45 that pivotally connect the first link pieces 33, 33 of each first link element portion 32. Here, in this embodiment, since the first telescopic link body 31 is composed of eleven first link element portions 32, the eleven support rods 29 connected to each first link element portion 32 are arranged side by side at intervals in the horizontal direction.

As shown in FIG. 1, cover plates 22, 23 extending in the vertical direction are fixed to each support rod 29, and these cover plates 22, 23 form a joint cover body 21 that shields the joint 83. The joint cover body 21 is composed of a central cover plate 22 located in the center in the left-right direction, a plurality of side cover plates 23 located on both the left and right sides of the central cover plate 22, and end cover plates 24 located on both the left and right ends. Here, the central cover plate 22 and each side cover plate 23 are fixed to each support rod 29, while each end cover plate 24 is fixed to the bracket 13.

As shown in Figures 2 and 3, the central cover plate 22 is composed of a central horizontal plate portion 22a in the form of a rectangular flat plate extending in the vertical direction, and a central support rod portion 22b with a generally U-shaped cross section fixed to the back surface (rear surface) of the central horizontal plate portion 22a. The central support rod portion 22b is provided in the center of the central horizontal plate portion 22a in the left-right direction, extending across the central horizontal plate portion 22a in the up-down direction. The rear wall portion of the central support rod portion 22b of the central cover plate 22 is fixed to a support rod 29 located in the center of the left-right direction by a screw rod (not shown).

The side cover plate 23 is composed of a rectangular flat side horizontal plate portion 23a extending in the vertical direction and a leg edge portion 23b with an L-shaped cross section extending from the inner edge of the side horizontal plate portion 23a to the rear side, and is formed by bending a single steel plate. The side horizontal plate portion 23a is formed in a rectangular flat plate shape with the same vertical length dimension as the central horizontal plate portion 22a of the central cover plate 22, and the leg edge portion 23b is provided across the vertical direction of the side horizontal plate portion 23a. The side cover plate 23 is arranged with the leg edge portion 23b on the inside (the central cover plate 22 side), and the rear wall portion of the leg edge portion 23b is fixed to the support rod 29 by a screw rod not shown. Here, the side cover plates 23 are fixed to all of the support rods 29 except for the central support rod 29 to which the central cover plate 22 is fixed, so five of them are arranged on each side of the central cover plate 22.

The end cover plate 24 is attached to the bracket 13 of the connecting base 2 (see Figure 1), and is composed of a rectangular flat end horizontal plate portion 24a and an attachment portion 24b extending from the outer edge of the end horizontal plate portion 24a toward the rear side, and is formed by bending a single steel plate. The end horizontal plate portion 24a is formed with the same length as the central horizontal plate portion 22a and the side horizontal plate portion 23a.

Thus, the joint cover body 21 is composed of one central cover plate 22, a plurality of (ten in this embodiment) side cover plates 23, and two end cover plates 24, with the left and right side edges of adjacent cover plates 22 to 24 overlapping slidably. Here, the outer edge of the central cover plate 22 is overlapped on the inner edges of the side cover plates 23, 23 on both the left and right sides adjacent to the central cover plate 22, the outer edges of each side cover plate 23 are overlapped on the inner edges of the adjacent side cover plates 23 on the left and right outside, and the outer edges of the adjacent side cover plates 23 on the outside of the end cover plates 24 are overlapped on the inner edges of the end cover plates 24. As a result, the end horizontal plate portion 24a of the end cover plate 24, the side horizontal plate portion 23a of each side cover plate 23, and the central horizontal plate portion 22a of the central cover plate 22 are stacked in a stepped manner, with the central horizontal plate portion 22a being at the highest position (see FIG. 1). In addition, the central support rod portion 22b of the central cover plate 22 and the leg edge portion 23b of the side cover plate 23 are fixed to each support rod 29 (in a state in which the joint cover body 21 is formed) and the respective depth dimensions of the central support rod portion 22b and each leg edge portion 23b are set so that they are stacked in a stepped manner as described above. In other words, the central support rod portion 22b of the central cover plate 22 has the longest depth dimension, and the leg edge portions 23b of each side cover plate 23 have depth dimensions that gradually become shorter from the center to the left and right outside.

Next, the operation of the joint covering device 1 of this embodiment will be described.
As shown in FIG. 11, when the two buildings 81, 82 are displaced relative to each other in the direction away from each other during an earthquake, the first telescopic link body 31 and the second telescopic link body 51 constituting each telescopic support body 7 are expanded. In response to this, each side cover plate 23 pivotally connected to each first link element portion 32 of the first telescopic link body 31 via the support rod 29 moves toward both the left and right outer sides, and the joint cover body 21 is expanded. Here, the first telescopic link body 31 and the second telescopic link body 51 can smoothly expand and contract as described above, so that they can smoothly follow the relative displacement of the two buildings 81, 82 in the direction away from each other due to an earthquake. In this way, the center cover plate 22 and each side cover plate 23 slide in conjunction with the expansion of the telescopic support body 7, so that the joint cover body 21 can smoothly expand in accordance with the relative displacement of the two buildings 81, 82 in the direction away from each other.

In addition, if the two structures 81, 82 are displaced relative to each other in the direction toward each other during an earthquake (not shown), the first and second telescopic link bodies 31 and 51 constituting each telescopic holder 7 will contract, and as the first telescopic link body 31 contracts, each side cover plate 23 will move toward the central cover plate 22, causing the joint cover body 21 to contract. Even when there is a relative displacement in the direction toward each other in this way, the first and second telescopic link bodies 31 and 51 will contract smoothly, allowing them to smoothly follow the relative displacement. Then, the central cover plate 22 and each side cover plate 23 will slide, allowing the joint cover body 21 to smoothly contract in response to the relative displacement in the direction toward each other.

On the other hand, as shown in FIG. 12, when the two structures 81, 82 are displaced relative to each other in the vertical direction during an earthquake, the first and second telescopic link bodies 31 and 51 constituting each telescopic holder 7 tilt vertically and expand with the tilt. Here, the first and second telescopic link bodies 31 and 51 can smoothly expand and contract, respectively, and are pivotally connected to the connecting bases 2, 2 (a pair of mounting brackets 15, 15) fixed to the two structures 81, 82, respectively, so that they can smoothly follow the vertical relative displacement of the two structures 81, 82 caused by an earthquake. Then, as the first telescopic link body 31 tilts, the center cover plate 22 and each side cover plate 23 move vertically, and the joint cover body 21 tilts. In this way, the center cover plate 22 and each side cover plate 23 slide in conjunction with the first telescopic link body 31, allowing the joint cover body 21 to tilt smoothly in response to the relative vertical displacement of the two structures 81, 82.

Furthermore, if the two structures 81, 82 are displaced relative to each other in the depth direction of the joint 83 during an earthquake (not shown), the mounting brackets 15, 15 tilt in the depth direction and the first telescopic link body 31 and the second telescopic link body 51 expand. As the first telescopic link body 31 expands, the joint cover body 21 expands. Here, the mounting brackets 15, 15 that pivotally connect both ends of the telescopic holder 7 are pivotally connected via hinges 12, 12 to the fixed frames 11, 11 that are fixed to the side wall surfaces 85, 86 of the two structures 81, 82, so that they can smoothly follow the relative displacement in the depth direction of the two structures 81, 82.

As described above, the joint cover device 1 of this embodiment is for walls, and is configured to cover the joint 83 between the side wall surfaces 85, 86 of the two buildings 81, 82 with the joint cover body 21 composed of the center cover plate 22 and the side cover plate 23. In this joint cover device 1, when the two buildings 81, 82 are displaced relative to each other during an earthquake, the expandable holder 7 expands and contracts and tilts in response to the relative displacement, and the center cover plate 22 and the side cover plate 23 slide in response to this, allowing the joint cover body 21 to expand and contract and tilt smoothly. Here, the joint cover body 21 of this embodiment is configured with a relatively large number of center cover plates 22 and side cover plates 23, so that it can expand and contract and tilt more smoothly in response to the relative displacement of the two buildings 81, 82.

In the telescopic holder 7 of this embodiment, every two first link element parts 32 of the first telescopic link body 31, to which the central cover plate 22 and the side cover plate 23 are respectively pivotally supported, and each second link element part 52 of the second telescopic link body 51, which is constituted by a second link piece 53 longer than the first link piece 33, are pivotally connected by a screw rod 41, so that the second telescopic link body 51 can suppress the swinging (fluttering) and vibration caused in the first telescopic link body 31 due to external factors such as wind. In particular, since the second link element parts 52 of this embodiment are formed by the long second link pieces 53 so as to be wider in the vertical direction than the first link element parts 32 in the normal state, the second telescopic link body 51 is more suppressed in swinging and vibration caused by the external factors than the first telescopic link body 31. Therefore, the second telescopic link body 51 can more effectively suppress the swinging and vibration of the first telescopic link body 31. For this reason, the central cover plate 22 and the side cover plate 23 pivotally connected to the first telescopic link body 31 can be stably supported, and the first telescopic link body 31 can be smoothly and stably telescopically operated.
Furthermore, in this embodiment, since the first telescopic link body 31 is configured with the first intermediate body 36 interposed between the link pieces 33, 34, it is possible to suppress the shaking and vibration caused in the first telescopic link body 31 due to the external factors. Similarly, since the second telescopic link body 51 is configured with the second intermediate body 56 interposed between the link pieces 53, 54, it is possible to suppress the shaking and vibration caused in the second intermediate body 56. As a result, the first telescopic link body 31 and the second telescopic link body 51 can smoothly telescope and expand by the first intermediate body 36 and the second intermediate body 56, respectively, and the support stability of the central cover plate 22 and the side cover plate 23 is also improved.
The joint cover device 1 of this embodiment is configured to improve the ability to follow the relative displacement of the two buildings 81, 82 by arranging a relatively large number of the cover plates 22, 23, and the smooth extension and contraction operation of the first telescopic link body 31 and the second telescopic link body 51 can further improve the ability of the cover plates 22, 23 to follow, and can also improve the support stability of each cover plate 22, 23 by the first telescopic link body 31.

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 expandable holders 7 can be changed and set as appropriate, and it is preferable to set it as appropriate depending on the installation location of the joint cover device 1, the width of the passageway, the weight of the joint cover body 21, etc.

In the embodiment, every third first link element portion 32 of the first telescopic link body 31 and each second link element portion 52 of the second telescopic link body 51 are pivotally connected by a screw rod 41, but this is not limited thereto, and every second link element portion may be pivotally supported by every third or every fourth first link element portion.

In the embodiment, the first intermediate body 36 of the first telescopic link body 31 is a disk-shaped body with an outer diameter approximately twice the width of the first link piece 33, but the outer diameter of the first intermediate body can be changed as appropriate. The outer diameter of the first intermediate body is preferably in the range from the width dimension of the first link piece 33 to three times the width. Here, by making the outer diameter larger than the width of the first link piece 33, the above-mentioned effect of suppressing the swinging and vibration of the first telescopic link body 31 can be achieved. On the other hand, if the outer diameter is large, the material cost increases and there is a risk that adjacent first intermediate bodies will come into contact with each other when telescopic. For this reason, it is preferable that the outer diameter of the first intermediate body is three times or less than the first link piece, and more preferably, it is two times or less than the first link piece.
Similarly, the outer diameter of the second intermediate body 56 can be appropriately changed and set within a range from the width dimension of the second link piece 53 to three times that width. By setting it within this range, like the first intermediate body, it is possible to suppress the swinging and vibration of the second telescopic link body, as well as to suppress an increase in material costs and contact between the second intermediate bodies during telescopic extension. The outer diameter of the second intermediate body is preferably no more than twice the width of the second link piece.

In the embodiment, the second telescopic link body 51 is disposed on the rear side of the joint of the first telescopic link body 31, but this is not limited thereto, and the second telescopic link body 51 may be disposed on the front side of the first telescopic link body 31. In this case, this can be realized by configuring the screw rod 45 that pivotally connects each first link element portion 32 of the first telescopic link body 31 as a long rod that protrudes further toward the front side than the second telescopic link body 51, and the support rod is pivotally connected to its tip.

In the embodiment, the central cover plate 22 and each side cover plate 23 constituting the joint cover body 21 are pivotally connected to each first link element portion 32 via the support rod 29, but this is not limited thereto, and the central cover plate 22 and each side cover plate 23 may be directly pivotally connected to each first link element portion 32 without providing the support rod 29.

In the embodiment, the joint cover body 21 is configured with five side cover plates 23 arranged on both the left and right sides of the central cover plate 22, but this is not limited to this, and the number of each cover plate 22, 23 arranged can be changed and set as appropriate.

In addition, the embodiment has been described with reference to a joint cover device 1 for walls, but the present invention is not limited to this and can also be applied to a joint cover device for ceilings.

REFERENCE SIGNS LIST 1 joint cover device 2 connecting base 7 expandable holder 11 fixed frame 12 hinge 13 bracket 15 mounting bracket 21 joint cover body 22 central cover plate 22a central horizontal plate portion 22b central support rod portion 23 side cover plate 23a side horizontal plate portion 23b leg edge portion 24 end cover plate 24a end horizontal plate portion 24b mounting portion 29 support rod 31 first expandable link body 32 first link element portion 33 first link piece 34 first short link piece 36 first intermediate body 41 to 43, 45, 46 screw rod 51 second expandable link body 52 second link element portion 53 second link piece 54 second short link piece 56 second intermediate body 81, 82 building 83 joint 85, 86 side wall surface

Claims (2)

A connecting base is provided on each side edge of adjacent buildings via a joint;
A joint cover body having a plurality of cover plates arranged across the joint and in parallel in the width direction of the joint;
A joint cover device comprising a plurality of expandable support bodies which are formed to be expandable in the width direction of the joint, both ends of which are pivotally connected to the respective connecting bases of the two buildings, and each cover plate of the joint cover body is rotatably connected to the respective expandable support bodies,
The elastic holder is
a first telescopic link body in which a plurality of first link element portions, each having a pair of first link pieces pivotally connected to each other in a cross-like manner at their centers, are arranged in the width direction of the joint and the ends of adjacent first link pieces are pivotally connected to each other to form a pantograph shape, and each cover plate of the joint cover body is pivotally supported by a first central pivot portion to which the pair of first link pieces of each first link element portion are pivotally connected;
A pair of second link pieces, each longer than the first link piece, are pivotally connected to each other at their centers in a cross-like manner to form a plurality of second link element portions, which are arranged in the width direction of the joint and are formed in a pantograph shape by pivoting the ends of adjacent second link pieces together, and a second telescopic link body is provided which is disposed on the surface side of the joint or on the inner side of the joint than the first telescopic link body;
A joint cover device characterized in that a first central pivot portion of the first telescopic link body is pivotally supported to a second central pivot portion to which a pair of second link pieces constituting each second link element portion of the second telescopic link body are pivotally connected, at intervals of a predetermined number. The first telescopic link body is configured such that a first intermediate body having a disk shape and an outer diameter larger than a width dimension of each of the first link pieces is slidably interposed between each of the pivotally connected first link pieces, and
The joint cover device described in claim 1, characterized in that the second telescopic link body is formed by slidably interposing a circular second intermediate body having an outer diameter larger than the width dimension of each of the pivotally connected second link pieces between the second link pieces.

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