Floor joint cover device

Abstract

To provide a joint cover device for a floor capable of stably supporting a person or an object moving on the joint.SOLUTION: A telescopic holding body 7 for supporting the joint cover body bridged over a joint is provided with a telescopic link body 31 in which a plurality of link pieces are pivotally connected in a pantograph shape and formed to be stretchable in the joint width direction, and a telescopic support beam 51 that is telescopic in the joint width direction; and in the telescopic link body 31, each cover plate constituting the joint cover body is pivoted, while the telescopic support beam 51 is arranged below the telescopic link body 31 to slidably support the telescopic link body 31. In such a configuration, the joint cover plate can be stably supported even if the number of arrangements of the telescopic holding bodies 7 is limited, for example, when they are arranged in a relatively narrow passageway.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a floor joint cover device for covering joints between floors of adjacent buildings. [Background technology]

[0002] In recent years, in order to minimize damage caused by earthquakes, many buildings have been constructed with their lower parts 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.

[0003] For example, the configuration of Patent Document 1 has been proposed as a floor joint cover device. This configuration includes a plurality of pantograph-like telescopic links whose both ends are pivotally supported on the side walls of adjacent buildings through joints, a plurality of extendable supports whose both ends are pivotally supported on the side walls of both buildings, which are arranged in parallel at a predetermined interval in the longitudinal direction of the joint, a plurality of support bars that are arranged in parallel at a predetermined interval in the width direction of the joint, pivotally supported on each telescopic link and slidably mounted on each support, and a plurality of joint plates that are fixed to each support bar and cover the joints. In this conventional configuration, the support can support the weight of the plurality of joint plates and the weight of people and objects passing over the joint plates. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-248466 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the floor joint cover device is installed between the floors of adjacent buildings, and a joint plate that covers the joint forms a part of the passageway that intersects with the joint. The length of the joint plate (the length in the longitudinal direction of the joint) is set according to the width of the passageway. As a result, when a relatively wide passageway is formed, the number of the supports that support the joint plate increases, while when a relatively narrow passageway is formed, the number of the supports is limited. Here, as described above, the expansion link pivots the support bars that respectively fix the joint plates, so at least two are provided even when a relatively narrow passageway is formed. On the other hand, the number of the supports is reduced in the case of a relatively narrow passageway. However, if the number of supports is reduced, it becomes difficult to stably support the support bar, and the burden on the expansion link increases to support the support bar and the joint plate. And, if the burden on the expansion link increases, there is a risk that the expansion link will not be able to smoothly expand and contract.

[0006] The present invention proposes a floor joint cover device that can stably support the plates that make up the passage and can expand and contract stably and smoothly, even when a passage having a relatively narrow width is constructed. [Means for solving the problem]

[0007] The present invention relates to a floor joint cover device comprising a joint cover body that is spanned across the joints between floors of adjacent buildings and has a plurality of cover plates arranged in parallel in the width direction of the joint, and a plurality of expandable holders that are formed to be expandable in the joint width direction, both ends of which are pivotally connected to the side edges of both buildings, and to which each cover plate of the joint cover body is rotatably connected, in which the expandable holder comprises an expandable link body having a plurality of link pieces pivotally connected in a pantograph shape, which is formed to be expandable in the joint width direction, both ends of which are pivotally connected to the side edges of both buildings, and to which each cover plate of the joint cover body is pivotally connected, and an expandable support beam that is formed to be expandable in the joint width direction, is provided below the expandable link body, and both ends of which are pivotally connected to the side edges of both buildings, and the expandable link body is slidably supported by the lower expandable support beam.

[0008] In this configuration, the telescopic support body is composed of an upper telescopic link body that pivots the cover plate and a telescopic support beam that supports the telescopic link body from below, so the weight of the joint cover body and the weight of people and objects passing over the joint cover body are supported by the telescopic support beam via the telescopic link body. This reduces the burden of the weight on the telescopic link body, and allows the telescopic link body to stably telescope. In addition, since the telescopic support body is composed of telescopic link bodies and telescopic support beams arranged above and below, for example, when the telescopic support body is arranged in a relatively narrow passage, even if the number of telescopic support bodies is limited, the joint cover body can be stably supported while maintaining smooth telescopic operation of the telescopic link body. As a result, even if the number of telescopic support bodies is limited, the weight of the joint cover body and the weight of people and objects passing over the joint cover body can be stably supported, and the telescopic operation of the telescopic link body allows each cover plate constituting the joint cover body to slide smoothly.

[0009] In the floor joint cover device of the present invention described above, the expandable support beam includes a center support beam body arranged along the joint width direction, and a pair of left and right side support beam bodies, one end of which is pivotally connected to the side edges of both buildings and the other end of which is connected to the left and right sides of the center support beam body so as to be relatively slidable in the joint width direction, and supports the center support beam body. The center support beam body is composed of a central rod portion along the joint width direction, left and right center rotating rollers rotatably connected to rotating shafts protruding from the central rod portion on both the left and right sides, and a pair of upper and lower guide portions extending along the joint width direction with a gap in the vertical direction, and the left and right side support beam bodies are arranged on both the left and right sides of the central rod portion, respectively. The proposed configuration comprises a side support beam body having a side beam rod portion extending along the joint width direction with one end pivotally connected to the side edge of the building, a side rotating roller rotatably connected to a rotating shaft protruding from the side beam rod portion to the left or right, and a middle guide rail between the upper and lower guide portions constituting the middle guide rail so as to be relatively movable in the joint width direction, and a side guide rail composed of a pair of upper and lower guide portions arranged on the same left or right side of the side beam rod portion as the side rotating roller, extending along the joint width direction with a gap in the vertical direction, and between which the middle rotating roller is fitted so as to be relatively movable in the joint width direction.

[0010] In this configuration, the telescopic support beam expands and contracts due to the relative movement between the center support beam body and the left and right side support beam bodies, and the operation mode of the telescopic link body is different from that of the pantograph-like telescopic link body. The telescopic holder can easily follow various relative displacements of the two structures during an earthquake, and can more stably exert both the effect of supporting the joint cover body and the effect of smoothly following the relative displacement. Here, the telescopic support beam is configured so that the center rotating roller of the center support beam body can move relatively in the joint width direction by the side guide rail of the side support beam body, and the side rotating roller of the side support beam body can move relatively in the joint width direction by the center guide rail of the center support beam body, so that the fitting state of each rotating roller and each guide rail can be maintained even during an earthquake, and smooth relative movement between each rotating roller and each guide rail can be stably executed. As a result, the telescopic support beam can stably follow the relative displacement of both structures during an earthquake by the smooth expansion and contraction of the telescopic support beam. Effect of the Invention

[0011] In the floor joint cover device of the present invention, as described above, the expandable support body can stably support the weight of the joint cover body and the weight of people and objects passing over the joint cover body, and can operate stably and smoothly following the relative displacement of both structures during an earthquake. This allows each cover body of the joint cover body connected to the expandable link body of the expandable support body to slide stably in the joint width direction and the joint length direction in accordance with the relative displacement. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a vertical cross-sectional view showing the installed state of the floor joint covering device 1. [Diagram 2] FIG. 2 is a plan view showing the installed state of the floor joint covering device 1. [Diagram 3] FIG. 2 is a perspective view showing a state in which the floor joint covering device 1 is installed. [Figure 4] FIG. 2 is a perspective view of a joint cover body 11. [Diagram 5] FIG. 2 is a plan view showing the joint cover body 11 omitted. [Figure 6] FIG. 2 is a perspective view showing the joint cover body 11 omitted. [Figure 7] FIG. 2 is a plan view of the extensible link body 31. [Figure 8] 2A and 2B are a plan view and a side view, respectively, of an expandable support beam 51. FIG. [Figure 9] 1A and 1B are a plan view and a side view, respectively, of a central support beam body 52 constituting an expandable support beam 51. FIG. [Figure 10] FIG. 4 is a front view of the central support beam 52. [Figure 11] 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. [Figure 12] 12A is a front view of a side support beam body 53, and FIG. 12B is a cross-sectional view taken along line SS in FIG. [Figure 13] 9A is a cross-sectional view taken along line TT in FIG. 8, and FIG. 9B is a cross-sectional view taken along line MM in FIG. [Figure 14] 13 is an explanatory diagram of the operation of the floor joint covering device 1 when the structures 81, 82 are relatively displaced in the direction toward each other. FIG. [Figure 15] 10 is an explanatory diagram of the operation of the floor joint covering device 1 when buildings 81, 82 are displaced relatively in the left-right direction. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] 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, forming 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.

[0014] In this embodiment, the longitudinal direction of the joint 83 is described as the left-right direction of the floor joint cover device 1. That is, the left-right direction in this embodiment corresponds to the longitudinal direction of the joint in the present invention. In addition, the direction from the structures 81, 82 toward the joint 83 is described as the inward direction, and the direction from the joint 83 toward the structures 81, 82 is described as the outward direction.

[0015] Connecting bases 2, 2 constituting the floor joint cover device 1 are disposed facing each other along the longitudinal direction of the joint 83 on the side edges of the floor 85 of the building 81 and the floor 86 of the building 82, and are fixed to each side edge. Here, supporting step edges 91, 92 recessed to a predetermined depth are provided on the side edges of the floors 85, 86 of the buildings 81, 82, and the connecting bases 2, 2 are disposed on these supporting step edges 91, 92. The connecting base 2 comprises a flat horizontal support edge 21 covering the upper surface of the support step edges 91, 92, and a vertical edge 22 erected in the left-right direction at the outer end of the horizontal support edge 21, and furthermore, an inner edge 23 extending downward along the wall surface of the buildings 81, 82 constituting the joint 83 is connected to the inner end of the horizontal support edge 21, and the joint width on the passage connecting the 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 constituting 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) or the like.

[0016] As shown in Figures 1, 5 and 6, cylindrical connecting rods 25, 25 are erected facing each other near the vertical edges 22, 22 of the horizontal supports 21, 21 of both buildings 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, four pairs of connecting rods 25, 25 are respectively arranged at positions symmetrical with respect to the center line in the left-right direction and at approximately equal intervals in the left-right direction. In this embodiment, the connecting rods 25 are composed of a bolt fixed to the horizontal support edge 21 and protruding upward from the horizontal support edge 21, and a cylinder fitted onto the bolt.

[0017] 1 to 3, a joint cover body 11 is inserted between the vertical edges 22, 22 of both structures 81, 82, and the joint cover body 11 forms a part of a passage that crosses the joint 83. This joint cover body 11 includes a central cover plate 12 arranged in the center portion in the joint width direction, a plurality of side cover plates 13 arranged on both the structures 81, 82 sides of the central cover plate 12, and end cover plates 14 connected to the vertical edges 22, 22 of the connecting bases 2, 2, respectively. In other words, a configuration in which a plurality of side cover plates 13 are arranged between the central cover plate 12 and the end cover plate 14 is provided.

[0018] As shown in Fig. 4, the central cover plate 12 is composed of a central horizontal plate portion 12a in the shape of a rectangular flat plate extending in the joint longitudinal direction (left-right direction) and a central support rod portion 12b with a generally U-shaped cross section fixed to the underside of the central horizontal plate portion 12a. The central support rod portion 12b is provided in the center of the joint width direction of the central horizontal plate portion 12a, extending along the joint longitudinal direction of the central horizontal plate portion 12a. The central support rod portion 12b has a plurality of insertion holes (not shown) formed in its bottom surface. A screw rod 38 of a central link element portion 32 constituting an expandable link body 31 described later is rotatably inserted into the insertion holes.

[0019] The side cover plate 13 is composed of a side horizontal plate portion 13a in the shape of a rectangular flat plate extending in the longitudinal direction of the joint (left-right direction), and a side support rod portion 13b with a substantially U-shaped cross section fixed to the underside of the side horizontal plate portion 13a. The side horizontal plate portion 13a is formed in the shape of a rectangular flat plate having the same length dimension in the longitudinal direction of the joint as the central horizontal plate portion 12a of the central cover plate 12, and the side support rod portion 13b is provided near the inner edge of the side horizontal plate portion 13a and across the longitudinal direction of the joint of the side horizontal plate portion 13a. The side support rod portion 13b has a plurality of insertion holes (not shown) formed in its bottom surface. A screw rod 38 of a link element portion 32 constituting an expandable link body 31 described later is rotatably inserted into the insertion hole.

[0020] 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 includes a rectangular flat end horizontal plate portion 14a and a leg edge portion 14b with a generally L-shaped cross section extending downward from the inner edge of the end horizontal plate portion 14a. The end horizontal plate portion 14a and the leg edge portion 14b are formed by bending a single steel plate. The end horizontal plate portion 14a is formed with the same length as the central horizontal plate portion 12a and the side horizontal plate portion 13a. In this embodiment, the end cover plate 14 has a reinforcing rod 14c joined to the underside of the end horizontal plate portion 14a, and the reinforcing rod 14c provides high strength and rigidity.

[0021] The joint cover body 11 is composed of one central cover plate 12, a plurality of (ten in this embodiment) side cover plates 13, and two end cover plates 14, and the side edges of adjacent cover plates 12 to 14 in the joint width direction are slidably overlapped. Here, the outer edge of the central cover plate 12 is overlapped on the inner edge of the side cover plates 13, 13 on both sides adjacent to the central cover plate 12, the outer edge of each side cover plate 13 is overlapped on the inner edge of the adjacent side cover plate 13 on the outside, and the outer edge of the adjacent side cover plate 13 on the outside of the end cover plate 14 is overlapped on the inner edge of the end cover plate 14. As a result, the end horizontal plate portion 14a of the end cover plate 14, the side horizontal plate portion 13a of each side cover plate 13, and the central horizontal plate portion 12a of the central cover plate 12 are stacked in a stepped manner, with the central horizontal plate portion 12a being at the highest position (see FIG. 1). The central support rod portion 12b of the central cover plate 12, the side support rod portion 13b of the side cover plate 13, and the leg edge portion 14b of the end cover plate 14 are formed so that their bottom surfaces are at the same height position when the joint cover body 11 is constructed. That is, the central support rod portion 12b of the central cover plate 12 is formed with the highest dimension, the leg edge portion 14b of the end cover plate 14 is formed with the lowest dimension, and the side support rod portion 13b of each side cover plate 13 arranged between the central cover plate 12 and the end cover plate 14 is formed with dimensions that gradually decrease from the inside to the outside. Furthermore, such a joint cover body 11 is formed by connecting the central cover plate 12 and each side cover plate 13 to each link element portion 32 of the expandable link body 31 described later, and by connecting the end cover plate 14 to the vertical edge 22 of the connecting base 2.

[0022] Next, the main part of the present invention will be described. 5 and 6, the floor joint cover device 1 of this embodiment has a configuration in which a plurality of expandable holders 7 are stretched across the connecting bases 2, 2 arranged on both buildings 81, 82. As described above, the connecting bases 2, 2 of both buildings 81, 82 are provided with four pairs of connecting rods 25, 25 arranged opposite each other, and each pair of connecting rods 25, 25 is connected to a respective expandable holder 7. The expandable holder 7 is composed of an expandable link body 31 that connects the center cover plate 12 and side cover plate 13 of the joint cover body 11 described above, and an expandable support beam 51 that supports the expandable link body 31.

[0023] The expandable link body 31 is formed by connecting a plurality of link pieces 33a, 33b in a pantograph shape. That is, as shown in FIG. 7, the structure is such that a plurality of X-shaped link element parts 32, each of which has two link pieces 33a, 33b connected by a screw rod 38, are connected together. Here, the link element part 32 is formed by connecting the link pieces 33a, 33b, each of which has its center part crossed with each other, by the screw rod 38 so as to be rotatable at the center part, and the expandable link body 31 is formed by lining up a plurality of link element parts 32, and connecting the ends of the link pieces 33a, 33b of the adjacent link element parts 32, 32 so as to be rotatable, respectively, by a screw rod (not shown). Furthermore, the link element parts 32, 32 at both ends are connected to the pair of connecting rods 25, 25 by the short link pieces 34a, 34b, respectively. The short link pieces 34a, 34b are approximately half the length of the link pieces 33a, 33b constituting 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 is also formed with 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. The telescopic link body 31 is pivotally connected to the connecting rods 25, 25 by fitting the connecting holes 37, 37 of the mounting portions 36, 36 at both ends to the outside of the pair of connecting rods 25, 25 arranged on both buildings 81, 82. This allows the telescopic link body 31 to rotate in the left-right direction and tilt in the up-down direction.

[0024] The expandable link body 31 thus arranged can expand and contract in response to the relative displacement between the two structures 81, 82 in the joint width direction (see FIG. 14). When the two structures 81, 82 are displaced relative to each other in the joint length direction, the expandable link body 31 can rotate left and right in response to the relative displacement (see FIG. 15). Furthermore, when the two structures 81, 82 are displaced relative to each other in the height direction, the expandable link body 31 can tilt up and down in response to the relative displacement.

[0025] Furthermore, the screw rods 38 that pivotally connect the link pieces 33a, 33b of each link element portion 32 that constitutes the expandable link body 31 are inserted into insertion holes (not shown) that are formed in the central support rod portion 12b of the central cover plate 12 and the side support rod portions 13b of each side cover plate 13 that constitute the joint cover body 11 described above, and are prevented from coming off by nuts or the like, thereby rotatably connecting the central cover plate 12 and the side cover plate 13 of the joint cover body 11 to the expandable link body 31. Here, the expandable link body 31 is composed of the same number of link element portions 32 as the number (11) of the central cover plate 12 and the side cover plate 13 of the joint cover body 11, and the screw rods 38 of each link element portion 32 are inserted into the insertion holes of the central cover plate 12 and the side cover plate 13 to be connected. The central support rod portion 12b of the central cover plate 12 and the side support rod portions 13b of the side cover plates 13 are mounted on the expandable link body 31 so as to be rotatable.

[0026] In the telescopic link body 31 of this embodiment, a circular sliding protrusion (not shown) is provided at the center of the lower surface of each link element portion 32, and the lower end of the threaded rod 38 that pivots the link pieces 33a, 33b is housed inside the sliding protrusion. The telescopic link body 31 is slidably supported on the telescopic support beam 51 by the sliding protrusion of each link element portion 32 being placed on the telescopic support beam 51.

[0027] On the other hand, as shown in Figure 8, the telescopic support beam 51 is composed of a pair of side support beams 53, 53 pivotally connected to the connecting rods 25, 25 of both buildings 81, 82, respectively, and a central support beam 52 supported by the side support beams 53, 53.

[0028] As shown in Figs. 8 to 10, the central support beam 52 has a central beam rod 61 having vertical side portions on both the left and right sides extending along the joint width direction, and a central roller unit 63 having four central rotating rollers 64 is provided on one side of the left and right side of one end of the central beam rod 61, and a central roller unit 63 is provided on the other side of the left and right side of the other end of the central beam rod 61. The central roller unit 63 has four rotating shafts 65 attached perpendicularly to the side of the central beam rod 61, which are arranged in parallel in the vertical direction and the joint width direction, and the central rotating rollers 64 are respectively connected to each rotating shaft 65 so as to be rotatable. The central rotating rollers 64 have a fitting circumferential groove 64a formed around their outer periphery.

[0029] Furthermore, the center support beam 52 has center guide rails 66, each having a pair of upper and lower guide portions 67, 68, fixed to the left and right sides of the center beam rod portion 61. The guide portions 67, 68 have horizontal edges 67a, 68a extending from the upper and lower ends of the center beam rod portion 61 to the left or right, respectively, and fitting edges 67b, 68b extending downward or upward from the extending ends of the horizontal edges 67a, 68a, respectively, and have a cross section of a generally L-shape, with the fitting edges 67b, 68b facing each other with a predetermined gap in the vertical direction. Such center guide rails 66 are provided along the longitudinal direction (joint width direction) of the center beam rod portion 61. In this embodiment, the middle guide rail 66 has an upper guide portion 67 provided above the middle roller unit 63 and a lower guide portion 68 provided below the middle roller unit 63, and the middle roller unit 63 is positioned in the gap between the upper and lower mating edges 67b, 68b.

[0030] A pivot rod 59 is provided on the upper surface of the center beam portion 61 at the center in the left-right and longitudinal directions. The pivot rod 59 is rotatably supported on the center cover plate 12 constituting the joint cover body 11, as described later.

[0031] 11 and 12, the side support beam body 53 includes a side beam rod portion 71 having a vertical side portion on one side extending along the joint width direction, and a beam mounting portion 72 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 to penetrate the beam mounting portion 72 in the vertical direction, and the connecting hole 72a is fitted onto the connecting rod 25. This allows the beam mounting portion 72 to rotate left and right relative to the connecting rod 25 and tilt up and down.

[0032] The side roller unit 73 has two rotating shafts 75 that are attached perpendicularly to the side surface of the side beam rod portion 71, which are arranged in parallel in the vertical direction, and the side rotating rollers 74 are rotatably connected to each rotating shaft 75. A fitting circumferential groove 74a is formed around the outer periphery of the side rotating roller 74. In this 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.

[0033] Furthermore, the side support beam 53 has a side guide rail 76 having a pair of upper and lower guide parts 77, 78 fixed to the side part of the side beam rod part 71. The guide parts 77, 78 have a substantially L-shaped cross section consisting of horizontal edges 77a, 78a extending to the left or right from the upper and lower parts of the side part of the side beam rod part 71, respectively, and fitting edges 77b, 78b extending downward or upward from the extending ends of the horizontal edges 77a, 78a, respectively, and the fitting edges 77b, 78b are arranged opposite each other with a predetermined gap in the vertical direction. The side guide rails 76 are respectively provided on the side part of the side beam rod part 71 over the longitudinal direction (joint width direction) of the side beam rod part 71, except for the other end where the side roller unit 73 is attached. In this embodiment, the side guide rail 76 is arranged so that it can be inserted between the upper and lower guide portions 67, 68 (upper and lower mating edges 67b, 68b) that constitute the middle guide rail 66 of the middle support beam 52, and the mating edge 77b of the upper guide portion 77 can be mated so as to be movable relative to the mating circumferential grooves 64a, 64a of the upper two rotating rollers 64, 64 that constitute the middle roller unit 63 of the middle support beam 52, and the mating edge 78b of the lower guide portion 78 can be mated so as to be movable relative to the mating circumferential grooves 64a, 64a of the lower two rotating rollers 64, 64 of the middle roller unit 63.

[0034] In this embodiment, the side support beam 53 is provided with external fitting pieces 79, 79 respectively protruding from the upper and lower ends of the side beam rod portion 71 toward the side portion. The upper and lower external fitting pieces 79, 79 are formed so that the middle guide rail 66 of the middle support beam 52 can be fitted therebetween, and are provided over 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 constituting the middle guide rail 66 are fitted between the upper and lower external fitting pieces 79, 79 to support the middle guide rail 66 in the vertical direction (see FIG. 11).

[0035] 8, the expandable support beam 51 is configured 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 into 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 into 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 center support beam 52 and the two side support beams 53, 53, and the telescopic support beam 51 has each side support beam 53, 53 pivotally connected to the connecting bases 2, 2 of both buildings 81, 82 and supported by being placed on the horizontal receiving edges 21, 21 of the connecting bases 2, 2 (see Figs. 1, 5, 6). In the 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 center 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 center support beam 52 and the side support beams 53, 53 can smoothly telescope by moving relatively along the respective guide rails 66, 76.

[0036] The telescopic support beam 51 is pivotally connected to the connecting bases 2, 2 of both buildings 81, 82 by fitting connecting holes 72a, 72a provided in the beam mounting parts 72, 72 at both ends onto a pair of connecting rods 25, 25 provided on the connecting bases 2, 2 of both buildings 81, 82. The telescopic support beam 51 has its side support beams 53, 53 slidably mounted on the horizontal receiving edges 21, 21 of the connecting bases 2, 2. As a result, the telescopic support beam 51 is pivotally connected to the connecting bases 2, 2 so as to be rotatable in the left-right direction and tiltable in the up-down direction, and is stably supported by the connecting bases 2, 2.

[0037] 1, 5 and 6, the telescopic support body 7 is composed of the telescopic support beam 51 pivotally connected to a pair of connecting rods 25, 25 of the connecting bases 2, 2 provided on both buildings 81, 82, and the telescopic link body 31 pivotally connected to the connecting rods 25, 25 from above the telescopic support beam 51. As described above, the telescopic support beam 51 has beam attachment parts 72, 72 at both ends pivotally connected to the pair of connecting rods 25, 25, and the side support beams 53, 53 are supported by being slidably placed on the horizontal receiving edges 21, 21 of the connecting bases 2, 2. The telescopic link body 31 is disposed on the telescopic support beam 51 with attachment parts 36, 36 pivotally connected to the same pair of connecting rods 25, 25 from above the telescopic support beam 51. As described above, the telescopic link body 31 is supported slidably on the telescopic support beam 51 by the sliding protrusion (not shown) provided at the center of the lower surface of each link element portion 32 being placed on the telescopic support beam 51. The threaded rod 38 of the central link element portion 32 constituting the telescopic link body 31 is rotatably connected to a pivot rod 59 protruding upward from the central support rod body 52 of the telescopic support beam 51 via the sliding protrusion that houses the threaded rod 38.

[0038] In this manner, in the telescopic holder 7 of this embodiment, the telescopic link body 31 is disposed directly above the telescopic support beam 51, and the telescopic link body 31 is directly supported by the telescopic support beam 51. The telescopic support beam 51 and the telescopic link body 31 are rotatable in the left-right direction and tiltable in the up-down direction, and can each perform telescopic movements.

[0039] Next, an operation mode of the floor joint covering device 1 of this embodiment will be described. As shown in Fig. 14, when the two buildings 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 link bodies 31 constituting each telescopic support body 7 contract, and each side cover plate 13 pivotally connected to each link element portion 32 of the telescopic link body 31 moves toward the center cover plate 12, causing the joint cover body 11 to contract. Here, since the telescopic support beams 51 and the telescopic link body 31 can smoothly expand and contract, they can smoothly follow the relative displacement of the two buildings 81, 82 in the direction toward each other due to an earthquake. In this way, the center cover plate 12 and each side cover plate 13 slide in conjunction with the contraction of the telescopic support body 7, allowing the joint cover body 11 to smoothly contract in response to the relative displacement of the two buildings 81, 82 in the direction toward each other.

[0040] Furthermore, in the event of a relative displacement between the two structures 81, 82 in the direction away from each other during an earthquake (not shown), the telescopic support beams 51 and telescopic link bodies 31 constituting each telescopic holder 7 expand, and as the telescopic link bodies 31 expand, each side cover plate 13 moves outward from the joint, and the joint cover body 11 expands. Even in the event of relative displacement in the direction away from each other in this manner, the telescopic support beams 51 and telescopic link bodies 31 expand smoothly, allowing them to smoothly follow the relative displacement. Then, the sliding of the center cover plate 12 and each side cover plate 13 allows the joint cover body 11 to expand smoothly in accordance with the relative displacement in the direction away from each other.

[0041] On the other hand, as shown in Fig. 15, 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, the telescopic support beams 51 and the telescopic link bodies 31 constituting each telescopic support body 7 tilt left-right and expand with the tilt. Here, the telescopic support beams 51 and the telescopic link bodies 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, respectively, 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, with the tilt of the telescopic support body 7, the center cover plate 12 and each side cover plate 13 move left-right, and the joint cover body 11 tilts. In this way, the central cover plate 12 and each side cover plate 13 slide in conjunction with the expandable link body 31, so that the joint cover body 11 can smoothly tilt in response to the relative displacement of the two buildings 81, 82 in the left-right direction.

[0042] Furthermore, when the two buildings 81, 82 are displaced relative to each other in the vertical direction during an earthquake (not shown), the telescopic support beams 51 and telescopic link bodies 31 constituting each telescopic holder 7 tilt and extend in the vertical direction. Then, as the telescopic holder 7 extends, the joint cover body 11 extends. Here, the telescopic support beams 51 and the telescopic link bodies 31 are pivotally connected at both ends to the connecting bases 2, 2 (a pair of connecting rods 25, 25) fixed to the two buildings 81, 82 so as to be able to tilt in the vertical direction, and therefore can smoothly follow the relative displacement of the two buildings 81, 82 in the vertical direction.

[0043] As described above, in the floor joint cover device 1 of this embodiment, 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 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, in the configuration of this embodiment, the joint cover body 11 is composed of the center cover plate 12 and the multiple side cover plates 13 rotatably connected to each link element portion 32 of the expandable link body 31, so that it can expand, contract and tilt more smoothly in response to the relative displacement.

[0044] In the telescopic holder 7 of this embodiment, the telescopic link body 31, which pivotally supports the center cover plate 12 and the side cover plate 13, is supported from below by the telescopic support beam 51, so that the weight of the joint cover body 11 and the weight of people and objects passing over the joint cover body 11 are supported by the telescopic support beam 51 via the telescopic link body 31. This reduces the burden of the weight acting on the telescopic link body 31, and the telescopic link body 31 can perform a stable telescopic operation. Therefore, the telescopic link body 31 can stably follow the relative displacement of the two buildings 81, 82, and accordingly the joint cover body 11 connected to the telescopic link body 31 can be smoothly telescopically moved and tilted. In this way, the expandable support 7 has both the function of expanding and contracting and tilting the joint cover body 11 according to the relative displacement (the function of the expandable link body 31) and the function of supporting the joint cover body 11 (the function of the expandable support beam 51), so that a plurality of them can be arranged in parallel in the longitudinal direction of the joint at a sufficient interval so as not to interfere with each other, and these functions can be stably and sufficiently performed. As a result, even if the number of the expandable support bodies 7 is limited when applied to a passage with a relatively narrow width in the longitudinal direction of the joint, the weight of the joint cover body 11 and the weight of people and objects passing over the joint cover body 11 can be stably supported by this number of expandable support bodies 7, and the joint cover body 11 can be smoothly expanded, contracted and tilted by following the relative displacement of the two structures 81, 82. In this way, the floor joint cover device 1 of this embodiment can stably perform the above-mentioned action and effect of being able to follow the relative displacement of the two structures 81, 82 and support the joint cover body 11 even when applied to a relatively narrow passage.

[0045] 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 telescopic support beam 51 supporting the center cover plate 12 and the side cover plate 13. Here, the telescopic 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 able to move relative to each other, 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 able to move relative to each other, so that the middle support beam body 52 and the side support beams 53, 53 move relatively along the respective 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 telescopic 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. Since the telescopic support beam 51 can firmly support the joint cover body 11 via the telescopic link body 31, it can exhibit high strength and rigidity that can stably support the load of people and objects passing over the joint cover body 11.

[0046] 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 the expandable holders 7 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 weight of the joint cover body 11, etc.

[0047] In the above embodiment, the middle roller unit 63 having four middle rollers 64 is disposed on the middle support beam 52 of the telescopic 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.

[0048] In addition, 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 to the above. For example, the connecting base may be configured to only pivot both ends of the telescopic support beam 51 but not support both ends of the telescopic support beam 51 (not have a horizontal support edge). [Explanation of symbols]

[0049] 1 Floor joint cover device 2 Connecting base 7 Telescopic holder 11 Joint cover body 12 Center cover plate 12a Central horizontal plate section 12b Central support rod 13 Side cover plate 13a Side horizontal plate 13b Side support rod 14 End cover plate 14a End horizontal plate part 14b Leg edge 14c reinforcement rod 21 Horizontal receiving edge 22 Vertical Edge 23 Medial edge 25 Connecting rod 31 Extendable link body 32 Link element part 33a, 33b Link piece 34a, 34b Short link piece 36 Mounting part 37 Connection hole 38 Screw rod 51 Telescopic support beam 52 Medium support beam 53 Side support beam 59 Pivot rod 61 Middle beam rod section 63 Middle roller unit 64 Medium Rotation Roller 64a Circumferential fitting groove 65 Rotating Axis 66 Center guide rail 67,68 Information Department 67a,68a Horizontal edge 67b,68b mating edge 71 Side beam rod 72 Beam attachment part 72a Connection hole 73 Side roller unit 74 Side rotating roller 74a Fitting circumferential groove 75 Rotating Axis 76 Side guide rail 77,78 Information Department 77a,78a Horizontal edge 77b, 78b mating edge 79 External fitting piece 81,82 Buildings 83 Joint 85,86 beds 91,92 Support step edge

Claims

[Claim 1] A joint cover body having a plurality of cover plates arranged in parallel in the width direction of the joint, the cover plate being inserted across the joint between the floors of adjacent buildings; A plurality of expandable support bodies that are formed to be expandable in the joint width direction, and both ends are pivotally supported on the side edges of both buildings, and each cover plate of the joint cover body is rotatably connected to the expandable support body. In a floor joint cover device comprising: The elastic holder is A telescopic link body in which a plurality of link pieces are pivotally connected in a pantograph shape and are formed so as to be expandable and contractible in the joint width direction, both ends of which are pivotally connected to the side edges of both buildings, and to which each cover plate of the joint cover body is pivotally supported; A telescopic support beam that is telescopic in the joint width direction, is provided below the telescopic link body, and has both ends pivotally connected to the side edges of both buildings. The telescopic link body is slidably supported by a telescopic support beam below, The telescopic support beam is A center support beam disposed along the joint width direction; A pair of left and right side support beams, one end of which is pivotally connected to the side edges of both buildings and the other end of which is connected to both the left and right sides of the central support beam so as to be relatively slidable in the joint width direction, support the central support beam; It is equipped with The central support beam is A central rod portion along the joint width direction; Left and right middle rollers rotatably connected to rotary shafts respectively protruding from the central rod portion on both the left and right sides; A pair of upper and lower guide parts extending along the joint width direction with a gap in the vertical direction, and a middle guide rail disposed on each of the left and right sides of the central rod part, Equipped with The side support beam is A side beam rod portion along the joint width direction, one end of which is pivotally connected to the side edge of the building; A side rotating roller is rotatably connected to a rotating shaft protruding from the side beam rod portion to one of the left and right sides, and is fitted between the upper and lower guide portions constituting the middle guide rail so as to be relatively movable in the joint width direction; a side guide rail that is disposed on the same left or right side of the side beam rod as the side rotating roller, and is configured with a pair of upper and lower guide parts that extend along the joint width direction with a gap in the vertical direction, and the middle rotating roller is fitted between the guide parts so as to be relatively movable in the joint width direction; A floor joint cover device comprising:

Images