Joint cover device

Abstract

To provide a joint cover device capable of reducing a load acting on a consolidated part between a shielding member and a side wall of a building and stably holding the shielding member.SOLUTION: A shielding member 21 arranged below a joint cover body 2 is supported from below by a first expansion rod 35 and a second expansion rod 36 arranged in a crossing shape respectively inclined to both right and left sides with respect to the width direction of a joint 83. According to such a configuration, since the shielding member 21 can be supported in a wide range with the first expansion rod 35 and the second expansion rod 36 as a diagonal line, the shielding member 21 can be stably held.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a joint covering device for covering a joint between 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. 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.

[0003] Known examples of such joint cover devices include a configuration in which a water stop sheet or a fire resistant band is disposed below a cover member that covers the joint, as in Patent Document 1. The water stop sheet or the fire resistant band is disposed so that both ends thereof are fixed to the side walls of both buildings to close the joint. As a result, the configuration with the water stop sheet can prevent rain leakage, while the configuration with the fire resistant band can improve the fire resistance of the building. Note that a configuration in which a sheet in which the water stop sheet and the fire resistant band are arranged in a layered configuration is also known. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-66821 A (Fig. 1) Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the above-mentioned shielding members, such as waterstop sheets and fireproof bands, are configured to be expandable at least in the width direction of the joint so as to accommodate expansion and contraction of the joint width during an earthquake. Specifically, in order to accommodate expansion of the joint width, shielding members having a width dimension greater than the joint width are disposed. Such shielding members are capable of exhibiting the above-mentioned waterstop performance and fireproof performance, but are relatively heavy, and therefore a relatively large load is applied to the connection portion between the side edge and the side wall of the building. In particular, in recent years, the width of the joints has tended to increase, and the width dimension of the shielding members has become relatively larger, resulting in an increase in the weight of the shielding members. As a result, the load acting on the connection portion between the side edge of the shielding member and the side wall of the building has increased, and there is a demand for reducing the load acting on the connection portion.

[0006] The present invention proposes a joint covering device that can reduce the load acting on the connection between the side end of the shielding member and the side wall of the building, and can stably hold the shielding member in place for a relatively long period of time. [Means for solving the problem]

[0007] The present invention relates to a joint cover device that is provided with a cover body that is placed across a joint between adjacent buildings to cover the joint, one end of the cover body being connected to a side edge of one of the buildings, and the other end of the cover body being a free end that is slidably mounted on the side edge of the other building. The joint cover device also includes a shielding member that is arranged below the cover body and has both side ends fixed to the side walls of both buildings to shield the joint, and is stretchable in the width direction of the joint, and a shielding support member that is arranged directly below the shielding member and supports the shielding member from below, and the shielding support member is: The joints are normally arranged along the horizontal direction and are arranged at an angle to one side of the longitudinal direction of the joint with respect to the width direction of the joint, a telescopic first rod whose both ends are rotatably connected to the side walls of the two buildings; It is normally arranged along the horizontal direction, and is inclined toward the other longitudinal direction of the joint with respect to the width direction of the joint, and is arranged below the first telescopic rod so as to intersect with the first telescopic rod, This joint cover device is characterized by comprising one or more diagonal brace support pairs each consisting of a second telescopic rod whose both ends are rotatably connected to the side walls of the two buildings.

[0008] In this configuration, the shielding member is supported by the diagonal support pair, which reduces the load acting on the areas connecting both ends of the shielding member to the side walls of the building. Furthermore, because the first and second telescopic rods of the diagonal support pair are extendable and retractable, they can appropriately and stably follow the relative displacement of the two buildings during an earthquake. Therefore, the shielding support member can stably support the shielding member, which expands and contracts due to an earthquake. Because the shielding support member is provided with such diagonal support pairs, the shielding member can be stably held for a relatively long period of time, even when it is installed in a joint between the two buildings with a wide gap between them, and the desired performance of the shielding member can be stably demonstrated.

[0009] Furthermore, because the first and second telescopic rods of the brace support pair of this configuration are arranged diagonally, the shielding member can be supported over a relatively wide area, with each rod forming a diagonal line. For example, in a configuration in which rod-shaped support members are arranged along the joint width direction, a large number of support members must be arranged in the longitudinal direction of the joint to support the shielding member over the same area as the brace support pair of this invention. Therefore, the configuration of this invention allows for a reduction in the number of support members arranged, and reduces installation costs, compared to the configuration in which support members are arranged along the joint width direction.

[0010] Note that the "ability to expand and contract in the width direction of the joint" of the shielding member does not necessarily mean that the shielding member itself has expandability, but may also mean that the shielding member itself is non-expandable (or has low expandability) but can expand and contract in accordance with the displacement of the joint in the width direction depending on its arrangement. For example, a sheet-like shielding member formed in an accordion shape or a shielding member with a width dimension longer than the joint width can be applied.

[0011] In the joint cover device of the present invention described above, a configuration is proposed in which a plurality of diagonal support pairs are arranged in the longitudinal direction of the joint, the first telescopic rods of each diagonal support pair are arranged parallel to each other, and the second telescopic rods of each diagonal support pair are arranged parallel to each other.

[0012] In this configuration, since each of the multiple diagonal support pairs has a first telescopic rod that is parallel to one another and a second telescopic rod that is parallel to one another, the first telescopic rod and the second telescopic rod of each diagonal support pair can smoothly and stably follow the relative displacement of the two structures during an earthquake, thereby enabling more stable support of the shielding member even during an earthquake. [Effects of the Invention]

[0013] According to the joint covering device of the present invention, the brace support pair can stably support the shielding member both in a normal state without an earthquake and when the two buildings are displaced relative to each other during an earthquake. This reduces the load on the connection between the shielding member and the side walls of the two buildings, and allows the shielding member to be stably supported for a relatively long period of time. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 2 is a vertical cross-sectional view showing the joint covering device 1 in an installed state. [Figure 2] FIG. 2 is a plan view showing the joint cover body 2 omitted. [Figure 3] 1 is a plan view showing the installed state of a shielding support member 31 that constitutes the joint covering device 1. FIG. [Figure 4] 1A and 1B are a plan view and a side view, respectively, showing a first telescopic rod 35 (a second telescopic rod 36) that constitutes a diagonal support pair. [Figure 5] 10 is an explanatory diagram of the operation of the joint covering device 1 when buildings 81 and 82 are relatively displaced in the direction separating from each other. [Figure 6] 10 is an explanatory diagram of the operation of the diagonal support pair 32 when the pair is relatively displaced in the separating direction. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] An embodiment of the present invention will be described with reference to the accompanying drawings. As shown in Figure 1, the joint cover device 1 of this embodiment is disposed in a joint 83 formed between buildings 81 and 82 of different heights and includes a joint cover body 2 that covers the joint 83. The buildings 81 and 82 are each a seismically isolated structure whose lower parts are 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 designed to absorb the relative horizontal shaking between the buildings 81 and 82 during an earthquake.

[0016] In this embodiment, the longitudinal direction of the joint 83 (the vertical direction in FIG. 2) corresponds to the left-right direction of the joint covering device 1. In addition, in the following description, the direction from one tall building 81 toward the other building 82 (left side in FIG. 2) is defined as the front, and the direction from the other building 82 toward the one building 81 (right side in FIG. 2) is defined as the rear. In other words, the front-to-rear direction in this embodiment corresponds to the width direction of the joint according to the present invention.

[0017] As shown in FIG. 1 , the joint cover body 2 of the joint cover device 1 has its rear edge connected to a sidewall 84 of a tall building 81 and its front edge slidably resting on a parapet 87 of a shorter building 82, covering the joint 83. The joint cover body 2 of this embodiment includes multiple holders 12 arranged side by side at a predetermined interval in the left-right direction and cover bodies 11 supported by the holders 12, with each holder 12 arranged along the front-to-rear direction. Each holder 12 is made of steel plate and has a step approximately at the center of its upper edge, which slopes downward from the rear end to the front end. A cover body 11, which conforms to the shape of the upper edge of each holder 12, rests on the upper edge of each holder 12 and is connected to each holder 12 by screws. The holders 12 and the cover bodies 11 are integrated to form the joint cover body 2. This joint cover body 2 corresponds to the cover body of the present invention.

[0018] In this joint cover body 2, the rear end of each holder 12 is fixed to the side wall 84 of the one building 81 with screws (not shown). A buffer member 15 extending laterally is provided at the lower front end of each holder 12 via a U-shaped steel member (not shown), and a strip-shaped elastic member 16 extending laterally is provided via an L-shaped steel member (not shown), extending laterally across the cover body 11. The buffer member 15 is made of rubber and has a predetermined shape. It is slidably mounted on a parapet 87 of the other building 82 to support the front end of the joint cover body 2 on the parapet 87. The strip-shaped elastic member 16 is made of a rubber plate and hangs downward from the lower front end of the joint cover body 2. When the buffer member 15 is mounted on the parapet 87, the lower portion of the strip-shaped elastic member 16 is curved and abuts against the upper surface of the parapet 87. This allows the gap between the joint cover body 2 and the parapet 87 to be sealed, preventing small animals from entering the joint 83 from the outside and wind from blowing in.

[0019] In addition, the joint cover device 1 has a shielding member 21, which is made up of a sheet-like water stop band 22 and a fire-resistant band 23 stacked together, arranged below the joint cover body 2 so as to shield the joint 83, and further has a shielding support member 31 arranged directly below the shielding member 21 to support the shielding member 21 from below.

[0020] As shown in Figures 1 and 2, the waterstop band 22 and the firestop band 23 each have a ridge-like structure with multiple repeated projections and recesses with a generally trapezoidal cross section in the front-to-rear direction, with each rear end fixed to a side wall 84 of one building 81 and each front end fixed to a side wall 86 of the other building 82. When pulled in the front-to-rear direction, the waterstop band 22 and the firestop band 23 can deform and stretch so that the projections and recesses become smaller (approach a straight line), while when pressed in the front-to-rear direction, they can deform so that the projections and recesses become larger. Furthermore, the front-to-rear length of the waterstop band 22 and the firestop band 23 when the projections and recesses are stretched linearly in the front-to-rear direction is set longer than the front-to-rear length of the joint 83 in a normal state without an earthquake. This allows the projections and recesses to stretch in the front-to-rear direction when the buildings 81 and 82 are separated by an earthquake, thereby maintaining the shielding state of the joint 83 (see Figure 5). In this way, the water stop band 22 and the fire resistance band 23 can expand and contract in the front-to-rear direction, so they can follow the relative displacement of the two buildings 81, 82 caused by an earthquake and stably maintain the joint 83 in a shielded state. Note that, except for the shape and dimensions used in this embodiment, conventionally known water stop bands 22 and fire resistance bands 23 can be applied, so details thereof will be omitted.

[0021] As shown in Figure 3, the shielding support member 31 comprises two sets of diagonal support pairs 32 arranged at a predetermined interval in the left-right direction, each set consisting of a first telescopic rod 35 inclined left or right with respect to the front-to-rear direction and a second telescopic rod 36 inclined left or right with respect to the other direction. One end of the first telescopic rod 35 is attached to a side wall 84 of one building 81 via a joint member 34, and the other end is attached to a side wall 86 of the other building 82 via a joint member 34, thereby spanning both buildings 81 and 82. Similarly, both ends of the second telescopic rod 36 are attached to both buildings 81 and 82 via joint members 34, 34, thereby spanning both buildings 81 and 82. The first telescopic rod 35 and the second telescopic rod 36 are normally arranged horizontally, and the second telescopic rod 36 is provided directly below the first telescopic rod 35 with a predetermined gap therebetween (see Figure 1).

[0022] In the normal state, the angle of inclination of the first telescopic rod 35 to the left or right relative to the front-to-rear direction of the first telescopic rod 35 (in other words, the angle at which it intersects with the wall surfaces of the side walls 84, 86) and the angle of inclination of the second telescopic rod 36 to the other left or right relative to the front-to-rear direction of the second telescopic rod 36 are substantially the same. In other words, the first telescopic rod 35 and the second telescopic rod 36 are arranged symmetrically with respect to an imaginary center line along the left-to-right direction at the center of the joint 83 in the front-to-rear direction.

[0023] As shown in Figure 4, the first telescopic rod 35 and the second telescopic rod 36 are each made up of two long steel pipes 37, 38 with different inner and outer diameters, with one steel pipe 37 fitted into the other steel pipe 38 so that they can slide longitudinally, and by sliding the two pipes 37, 38 relative to each other, they can be freely extended and retracted in their respective longitudinal directions. Furthermore, connecting parts 39, 39 that are rotatably connected to the joint member 34 are provided on both ends of the first telescopic rod 35 and the second telescopic rod 36, respectively.

[0024] The joint member 34 is shaped like a hinge that can rotate up and down, and the connecting portions 39 of the first and second telescopic rods 35, 36 are rotatably connected to each other. By being connected to the side walls 84, 86 via this joint member 34, the first and second telescopic rods 35, 36 can rotate up and down and left and right. Note that a conventionally known joint member 34 can be used for this joint member 34, so a detailed description thereof will be omitted.

[0025] As shown in Fig. 3, the two sets of diagonal support pairs 32, 32 have their first telescopic rods 35, 35 arranged in parallel and their second telescopic rods 36, 36 arranged in parallel. This makes the distance between the first telescopic rods 35, 35 equal to the distance between the second telescopic rods 36, 36.

[0026] The shielding support member 31 arranged in this manner can support the shielding member (waterstop belt 22 and fireproof belt 23) 21 from below in a range diagonally defined by both ends of the first telescopic rod 35 and the second telescopic rod 36. Furthermore, in this embodiment, two sets of diagonal support pairs 32 are provided, thereby enabling more stable support over a relatively wide range. Thus, the shielding support member 31 of this embodiment can stably support a relatively wide range with a relatively small number of first telescopic rods 35 and second telescopic rods 36. Furthermore, in this embodiment, the shielding member 21 has a structure in which multiple concave and convex portions aligned in the left-right direction are arranged in the front-rear direction, allowing multiple concave portions to rest on and be supported by the shielding support member 31. This allows the weight of the shielding member 21 acting on the shielding support member 31 to be distributed, thereby suppressing stress concentration on the shielding support member 31 and improving the support stability of the shielding support member 31.

[0027] The shielding member 21 is heavy, and its weight is placed on the first and second telescopic rods 35, 36. Therefore, the first telescopic rod 35 and the second telescopic rod 36 are prone to bending, and the first telescopic rod 35 and the second telescopic rod 36 may come into contact with each other in a normal state.

[0028] Next, the operation of the joint covering device 1 of this embodiment will be described. 5 and 6, when the structures 81 and 82 are displaced relatively apart during an earthquake, the buffer member 15 disposed at the lower front end of the joint cover body 2 slides on the parapet 87 of the structure 82. If the displacement in the displaced direction is relatively large and the band-shaped elastic member 16 is positioned behind the parapet 87, the band-shaped elastic member 16 is released from contact with the parapet 87 and hangs down. As the two structures 81 and 82 are displaced relative to each other, the shielding member (waterstop belt 22 and fireproof belt 23) 21 extends in the front-to-rear direction, and the telescopic rods 35 and 36 of the shielding support member 31 that supports the shielding member 21 also extend. Here, the waterstop belt 22 and the fireproof belt 23 that constitute the shielding member 21 are fixed at their front and rear ends to the side walls 84, 86 of the buildings 81, 82, and therefore, due to the relative displacement in the separating direction, the waterstop belt 22 and the fireproof belt 23 deform and extend in the front-to-rear direction so as to reduce the irregularities of the waterstop belt 22 and the fireproof belt 23 (to approach a straight line). Furthermore, because the first and second telescopic rods 35, 36 are attached at their respective ends to the side walls 84, 86 via the joint members 34, the relative displacement in the separating direction causes the inclination angle with respect to the front-to-rear direction to change and the rods to extend. In this way, the shielding member 21 and the shielding support member 31 can follow the relative displacement of the buildings 81, 82 in the separating direction, and therefore the shielding member 21 can be stably supported by the shielding support member 31 even during the relative displacement.

[0029] When returning to their normal state (a state without an earthquake) after such displacement in the separating direction, the two buildings 81, 82 are displaced in a direction that brings them closer together. As a result, the buffer member 15 of the joint cover body 2 slides on the parapet 87 of the building 82, and the band-shaped elastic member 16 is bent and deformed to abut on the parapet 87. In response to this relative displacement, the shielding member 21 contracts from the state in which it is extended in the front-to-rear direction, and the telescopic rods 35, 36 of the shielding support member 31 contract as well as changing their inclination angles. Even in the case of this relative displacement that returns to their normal state (relative displacement in the approaching direction), the shielding member 21 and the shielding support member 31 can follow each other, so the shielding support member 31 can stably support the shielding member 21.

[0030] Furthermore, during an earthquake, the two buildings 81, 82 may be displaced relative to each other not only in the front-to-back direction as described above, but also in the left-to-right and up-to-down directions. In any case of relative displacement in any of these directions, the shielding support member 31 expands and contracts in response to the relative displacement and can smoothly change its orientation to follow the relative displacement. Therefore, the shielding support member 31 can stably support the shielding member 21 during relative displacement during an earthquake.

[0031] As described above, the joint cover device 1 of this embodiment supports the waterstop belt 22 and the fireproof belt 23 disposed below the joint cover body 2 from below by the diagonal support pair 32 composed of the first telescopic rod 35 and the second telescopic rod 36 disposed at an angle to the left and right with respect to the front-to-rear direction. This configuration reduces the load acting on the connection portions between the side walls 84, 86 of the two buildings 81, 82 due to the weight of the waterstop belt 22 and the fireproof belt 23, thereby enabling stable support of the waterstop belt 22 and the fireproof belt 23 over a relatively long period of time. The diagonal support pair 32 can support the waterstop belt 22 and the fireproof belt 23 within a range formed diagonally by the first telescopic rod 35 and the second telescopic rod 36. In this embodiment, two diagonal support pairs 32 are disposed, enabling stable support of the shielding member 21 over a relatively wide range. In this way, the shielding support member 31 of this embodiment can support a relatively wide range of the shielding member 21 with a relatively small number of the extendable rods 35, 36 (four in total).

[0032] Furthermore, the first telescopic rod 35 and the second telescopic rod 36 of the diagonal support pair 32 are configured to be telescopic, and their respective ends are rotatably attached to the side walls 84, 86 via joint members 34, allowing them to smoothly follow the relative displacement of the two buildings 81, 82 during an earthquake. This allows the shielding support member 31 to stably support the shielding member 21 even during an earthquake. In particular, since the shielding member 21 is configured such that the waterstop belt 22 and the fireproof belt 23 have multiple, left-right, concave and convex portions repeated in the front-to-rear direction, the shielding member 21 is stably supported by the diagonal support pair 32 both in a normal state without an earthquake and when the shielding member 21 expands or contracts due to the relative displacement during an earthquake. More specifically, the shielding member 21 is supported on the diagonal support pair 32 by multiple recesses aligned in the front-to-rear direction, and can be supported by these recesses even when the shielding member expands or contracts during an earthquake. Therefore, it is possible to prevent the shielding member 21 from being supported locally by some of the diagonal support pairs 32 due to expansion and contraction of the shielding member 21, and it is possible to prevent the concentration of load due to this local support, resulting in excellent support stability by the shielding support member 31. According to the shielding support member 31 of this embodiment, even in a structure in which the width of the joint 83 (the distance between the two buildings 81, 82) is relatively wide, the shielding member 21 can be stably supported by appropriately setting the number of sets of diagonal support pairs 32.

[0033] Furthermore, in the brace support pair 32 of this embodiment, the first telescopic rod 35 and the second telescopic rod 36 are arranged with a predetermined gap between them in the vertical direction, which prevents the shielding member 21 from becoming pinched in the gap during an earthquake and prevents the shielding member 21 and the telescopic rods 35, 36 from becoming difficult to operate due to pinching. This allows the shielding member 21 to smoothly follow the relative displacement of the two buildings 81, 82 even during an earthquake, and the aforementioned effects of this embodiment can be stably achieved. It is possible that the weight of the shielding member 21 causes the telescopic rods 35, 36 to bend, causing the two telescopic rods 35, 36 to come into contact. However, even if the shielding member 21 becomes pinched due to relative displacement during an earthquake, this can be resolved during the telescopic operation, making it less likely that the problem of difficulty in telescopic operation will occur.

[0034] The present invention is not limited to the above-described embodiments, and can be modified as appropriate within the scope of the present invention. For example, in this embodiment, two sets of diagonal support pairs 32 are provided, but the present invention is not limited to this, and it is also possible to provide one set of diagonal support pairs 32 or three sets of diagonal support pairs 32. When three or more sets of diagonal support pairs 32 are provided, it is preferable that the distances between adjacent first telescopic rods 35 are all the same and that the distances between adjacent second telescopic rods 36 are all the same. Furthermore, it is preferable that the distances between adjacent first telescopic rods 35 and the distances between adjacent second telescopic rods 36 are the same. The inclination angle at which the first telescopic rod 35 and the second telescopic rod 36 are arranged can be changed as appropriate. The inclination angle of the first telescopic rod 35 and the inclination angle of the second telescopic rod 36 may be the same as in the embodiment, or may be different. Furthermore, in the embodiment, the present invention is applied to a joint covering device 1 for a roof, but is not limited to this, and can also be applied to, for example, a joint covering device for a floor. [Explanation of symbols]

[0035] 1. Joint cover device 2 Joint cover body (cover body) 11 Cover body 12 holder 15. Cushioning material 16. Elastic strip-shaped member 21 Shielding member 22 Waterstop 23 Fireproof Belt 31 Shielding support member 32 Bracing support pair 34 Joint material 35 First telescopic rod 36 Second telescopic rod 37,38 Configuration pipe 39 Connecting part 81,82 Buildings 83 Joint 84,86 side wall 87 Parapet

Claims

1. A joint cover device is provided which is provided with a cover body that is placed across a joint between adjacent buildings to cover the joint, one end of the cover body being connected to a side edge of one of the buildings, and the other end of the cover body being a free end that is slidably mounted on the side edge of the other building, A shielding member that is arranged below the cover body and has both side ends fixed to the side walls of both buildings to shield the joint, and is stretchable in the width direction of the joint; a shielding support member disposed directly below the shielding member and supporting the shielding member from below; Equipped with The shielding support member is A first telescopic rod that is normally arranged along the horizontal direction and is arranged at an angle to one side of the longitudinal direction of the joint with respect to the width direction of the joint, and both ends of which are rotatably connected to the side walls of both buildings; A second telescopic rod that is normally arranged along the horizontal direction and is inclined in the other longitudinal direction of the joint with respect to the width direction of the joint, and is arranged below the first telescopic rod so as to intersect with the first telescopic rod, and both ends of the second telescopic rod are rotatably connected to the side walls of both buildings, A joint cover device characterized by comprising one or more brace support pairs constituted by the above.

2. A plurality of brace support pairs are arranged in the longitudinal direction of the joint, 2. The joint cover device according to claim 1, wherein the first telescopic rods of each brace support pair are arranged parallel to each other, and the second telescopic rods of each brace support pair are arranged parallel to each other.

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