JP4460386B2 - Floor expansion joint device - Google Patents

Description

  The present invention relates to a floor expansion joint device that can allow relative displacement of each housing due to an earthquake or the like in a state where a gap between two adjacent housings of a building is closed.

  FIG. 7 is a vertical cross-sectional view showing a typical conventional expansion joint device 1 for floor, and this conventional technology is disclosed in Patent Document 1. FIG. This conventional expansion joint device 1 for floors has a pair of rails 5a attached to floor frame bodies 4a, 4b on the joint part 2 side of the left and right buildings 3a, 3b built through joint parts 2 that are gaps. 5b, a plurality of support bars 7 supported by the pair of rails 5a and 5b so that both ends of the rails 5a and 6b are slidable by the rollers 6a and 6b. A plurality of joint plate support bars 8 whose heights h are successively smaller as they are arranged closer to both ends, and each joint plate support bar so that each joint plate support bar 8 can be expanded and contracted at predetermined intervals. A plurality of pantograph-like expansion and contraction pivotally supported by pins 9 on both ends and pivotally supported by pins 10a and 10b on the floor frame 4a and 4b on the joint 2 side of the left and right buildings 3a and 3b. A link mechanism 11, and a plurality of joint plates 13 fixed by screws 12 to the respective joint plate support bar 8.

  In such a floor expansion joint device 1, each joint plate support bar 8 is formed with an insertion hole 14 through which the expansion link mechanism 11 is inserted in an intermediate portion in the height direction. By inserting the telescopic link mechanism 11 into the insertion hole 14, each joint plate support bar 8 is directly supported by the upper surface of each support bar 7, and each building 3a, 3b approaches and separates from each other due to an earthquake or the like. When the relative displacement occurs, each support bar 7 slides on the upper surface of each joint plate support bar 8 to allow rotation of each joint plate support bar 8, and each joint plate is supported by the telescopic link mechanism 11. It is possible to prevent the support bar 8 from being displaced in the longitudinal direction, and to allow relative displacement in the direction in which the buildings 3a and 3b approach and separate from each other, thereby maintaining the joint portion 2 in a closed state. It is configured as follows.

JP 2003-96926 A

  In the above-described conventional technology, each joint plate support bar 8 is formed with an insertion hole 14 through which each expansion / contraction link mechanism 11 is inserted, so that sufficient strength against bending load and the like is ensured, and bending is prevented. However, in order to make the amount of deflection below a predetermined amount, each joint plate support bar 8 must have a required cross-section at the portion where the insertion hole 14 is formed. Therefore, each joint plate support bar 8 must use a member having a large cross section such as a flat bar, and each joint plate support bar 8 has a large weight.

  In the configuration in which the expansion / contraction link mechanism 11 is inserted through the insertion holes 14 of the plurality of joint plate support bars 8 having a large weight as described above, when the floor expansion joint device 1 is attached to the floor frame bodies 4a and 4b, the joint plate support bars are provided. 8 with each expansion link mechanism 11 being inserted into the insertion hole 14, and the joint plate support bar 8 and each expansion link mechanism 11 are assembled on the support bar 7 mounted between the rails 5 a and 5 b. It is necessary for a person to get on by hand. Therefore, the operator has to move the joint plate support bars 8 and the telescopic link mechanisms 11 having heavy weights onto the support bars 7 to perform the attachment work, which requires a lot of labor for the attachment work. is there.

  Further, each joint plate support bar 8 has a height dimension h that is gradually reduced as it is arranged on both end sides of the center part in order to avoid mutual interference of each joint plate 13. In the state where each joint plate 13 is attached to the plate support bar 8, there is a problem that the central portion in the width direction extending between the floor frames 4 a, 4 b is raised above both end portions in the width direction and hinders passage. .

  Furthermore, in the conventional expansion joint device 1 for floors, as shown in the plan view of FIG. 8, one of the floor frames 4a and 4b extends in the direction in which the joint portion 2 extends (perpendicular to the plane of FIG. 7). ), The expansion link mechanism 11 is angularly displaced, so that the joint plate support bars 8 and the joint plates 13 follow and move in the longitudinal direction. Diagonal movement gaps G1 and G2 are generated. For this reason, when the wall surface which restrict | limits the displacement of the said longitudinal direction of the expansion joint apparatus 1 for floors exists in the both sides of the joint part 2, a structure for closing the movement gaps G1 and G2 is provided, or a floor is provided in a wall surface. There is a problem that notches that can allow the movement of both end portions in the longitudinal direction of the expansion joint device 1 have to be provided, which requires a great deal of cost and labor.

  Therefore, the object of the present invention is to prevent the generation of a moving gap, improve the workability and reduce the construction cost, improve the workability at the time of installation by reducing the weight, and eliminate the bulge in the central portion in the width direction. It is to provide a floor expansion joint device that realizes a smooth passage surface and allows smooth passage.

The present invention is a pair of rails that are fixed to each facing portion of two adjacent housings facing each other and extend in parallel along the extending direction of each facing portion;
A plurality of rotation support means that can be extended and retracted by following the relative displacement in the approaching and separating directions of the opposing portions, with both end portions in the longitudinal direction being movably supported by each rail,
A plurality of first support members arranged in parallel to each other at an interval in the approaching and separating directions on the upper part of each rotation support means, and pin-coupled to each rotation support means;
A plurality of second support members supported by each first support member so as to be movable along the longitudinal direction thereof;
A plurality of cover bodies each having a cover portion that is fixed to each second support member and extends to one side in the width direction beyond the second support member adjacent to one side in the width direction parallel to the approaching and separating directions; It is the expansion joint apparatus for floors characterized by including these.

  According to the present invention, a pair of rails extending in parallel along the extending direction of each facing portion is fixed to each facing portion of the two adjacent housings facing each other. Each rail supports each end portion in the longitudinal direction of the plurality of rotation support means in a movable manner. Each rotation support means is configured to be able to expand and contract following the relative displacement in the approaching and separating directions of each facing portion of each housing.

  A plurality of first support members are arranged in parallel to each other with an interval in the approaching and separating directions above the rotation support means. These first support members are pin-coupled to the respective rotation support means. Accordingly, each first support member is rotatable about the axis of each pin with respect to each rotation support means, and each first support member is rotated each time the expansion and contraction displacement of each facing portion in the approaching and separating directions. Regardless of the rotational movement of the moving support means, they are kept parallel to each other.

  Each first support member supports a plurality of second support members movably along the longitudinal direction of each first support member. A plurality of cover bodies are fixed to each second support member. Each cover body extends over two second support members beyond the second support member adjacent to one side in the width direction along the approaching and separating directions, and the two cover bodies adjacent to each other are partially The gaps between the second support members are covered in a state where the second support members overlap.

  With such a configuration, when the opposing portions are displaced in the directions approaching and separating from each other, the respective rotation support means rotate along the respective rails, and the respective first support members that are pin-coupled to the respective rotation support means are It is displaced in the longitudinal direction according to the rotation while maintaining the mutually parallel state. The displacement in the longitudinal direction of each first support member is allowed by each second support member being supported by each first support member so as to be movable in the longitudinal direction, and each second support member is allowed to move to each first support member. And moving in the longitudinal direction following the movement is prevented. Therefore, the cover body fixed to each second support member does not move in the longitudinal direction, and a passer-by can safely pass over the cover body. In addition, since each second support member does not move in the longitudinal direction, a notch for allowing movement of each second support member in the longitudinal direction on both sides in the longitudinal direction of each second support member or the conventional It is not necessary to provide a configuration for closing the movement gap of the technology, and the workability can be improved and the cost can be reduced.

  In this way, a plurality of first support members are pin-coupled to the upper portions of a plurality of rotation support means whose both ends are movably supported by each rail, and each second support member is movable by each first support member. And the cover body is fixed to each second support member, and the displacement in the direction of approaching and separating from each housing due to an earthquake or the like is allowed without causing the movement gap as in the conventional technique. A flat road surface can be realized by each cover body without causing interference between the first support members, interference between the second support members, and interference between the cover bodies. In addition, since each of the plurality of rotation support means, the first support member, and the second support member is arranged in a state where they are stacked one above the other, as in the prior art, for inserting other members. Compared to members with insertion holes, it is not necessary to increase the height of the members in order to ensure an effective cross section, and it is necessary to use a member having a large cross section excluding the insertion holes. In addition, the weight can be reduced.

  Moreover, as described above, each of the plurality of rotation support means, the first support member, and the second support member does not need to use a member having a large cross section in order to secure an effective cross section, and is thus fixed to each housing. It is possible to attach the first support member and the second support member to the rotating support means in an assembled state, and to facilitate the installation work on site, and to improve the workability. Can be improved.

  Further, the present invention is characterized in that means for reducing sliding friction between the first support member and the second support member is interposed between the first support member and the second support member. To do.

  According to the present invention, since the means for reducing the friction is interposed between each first support member and each second support member, the respective housings are suddenly displaced in a direction in which they approach and separate from each other due to an earthquake or the like. However, each second support member can move smoothly in the longitudinal direction with respect to each first support member, and a large force is generated due to mutual friction between each first support member and each second support member. Acts to prevent deformation and destruction.

  Further, in the present invention, each of the rotation support means is composed of a hollow member whose both ends in the longitudinal direction are guided by the rails, and the first support member that is pin-coupled to the center in the longitudinal direction of each of the rotation support means. The second support member is fixed.

  According to the present invention, each of the rotation support means is formed of a hollow member whose longitudinal ends are guided by the rails. Therefore, even if the cross-sectional area is small, it has a high cross-sectional performance, is lightweight and has high strength. be able to. In addition, the first support member is pin-coupled to the central portion in the width direction of each rotation support means realized by such a member, and the second support member is fixed to the first support member. As a result, even if each facing portion is displaced in the direction of approaching and separating, the first support member at the center and the second support member at the center are positioned at the center portion in the width direction between the housings, and the first and second support members are positioned. The displacement of the two support members in the approaching and separating directions can be distributed and equalized to the left and right with respect to the central portion in the width direction to prevent interference between the first support members and interference between the second support members. .

  According to the present invention, each first support member is pin-coupled to the upper portion of each rotation support means, each second support member is provided on each first support member so as to be movable in the longitudinal direction, and each second support member is covered. Since the body is fixed, it is not necessary to make each rotation support means, each first support member, and each second support member a large cross section excluding the insertion hole from the effective cross section as in the prior art, thereby Each rotation support means can be reduced in weight, and the workability at the time of attachment can be improved. In addition, since each cover body is provided so as to overlap with the adjacent cover body, each cover body forms a flat passage surface, and even if displacement in the approaching and separating directions occurs, Therefore, it is possible to allow a mutual passage without causing interference, and to form a flat road surface without raising the central portion in the width direction, thereby allowing safe passage.

  According to the invention, when the first support member and the second support member are displaced in the approaching and separating directions by reducing the friction between the first support member and the second support member, the first support member and the second support member. It is prevented that a large frictional force acts between each other to cause deformation and destruction.

  Furthermore, according to the present invention, the rotation support means is realized by a hollow member, so that a large strength can be obtained with light weight, and the first support member that is pin-coupled to the rotation support means at the center in the width direction. By fixing the second support member, the first and second support members arranged in the center are positioned at the center in the width direction between the housings even if the displacement in the approaching and separating directions occurs due to an earthquake or the like. Can be arranged. Accordingly, the displacements in the width direction of the remaining first and second support members disposed on both sides in the width direction with respect to the first and second support members in the center are distributed and equalized to the left and right, and the first and second support members are equalized. It is possible to prevent the two support members from being biased and displaced toward one side of each housing, and to prevent mutual interference between the first support members and between the second support members.

  FIG. 1 is a horizontal sectional view of a part of a building 21 provided with a floor expansion joint device 20 according to an embodiment of the present invention. In the present embodiment, a direction perpendicular to the paper surface of FIG. 1 is defined as a vertical direction, and a direction parallel to the paper surface is defined as a horizontal direction. The building 21 provided with the floor expansion joint device 20 of this embodiment is a building having a seismic isolation structure, and a main body side housing 22 constructed on the ground and a seismic isolation device (not shown) on the main body side housing 22 are provided. A building main body supported via the main body, and an elevator-side housing 23 that protrudes downward from the building main body and is surrounded by the main body-side housing 22. The elevator side housing 23 and the main body side housing 22 are constructed structurally independently.

  The main body side housing 22 includes two walls 24 and 25 disposed on the left and right sides of the elevator side housing 23 in FIG. 1 and a column 26 disposed in front of the elevator side housing 23. The wall surfaces 27 and 28 facing each other of the walls 24 and 25 are parallel to each other. The elevator-side housing 23 has an elevator chamber 44 in which elevator pits 32a and 32b for accommodating two cages 30 and 31 that move up and down in the vertical direction perpendicular to the paper surface of FIG. 1 are formed. Is surrounded by a front wall 35, a back wall 36 and side walls 37, 38. Another side wall 39 is provided between one side wall 38 and one wall 25 of the main body side housing 22, and a staircase 33 is provided between the side wall 39 and the one side wall 38. An installation space 34 is formed. The elevator side housing 23 has an integrated structure including a front wall 35, a back wall 36, side walls 37, 38, 39 and a floor structure 54.

  The front wall 35 and the column 26 are separated by a distance L1 in the front-rear direction, which is the vertical direction in FIG. The floor expansion joint device 20 of the present embodiment is installed across the walls 24 and 25 so as to cover the gap 40. The elevator pits 32a and 32b are formed inside the front wall 35, the rear wall 36, and the side walls 37 and 38, respectively. The front wall 35 is formed with openings 41 and 42 for a user to get on and off the elevator on each floor and an opening 43 for a user to enter and exit the stairs 33 on each floor. Doors 47 and 48 that open and close in conjunction with the doors 45 and 46 of the elevator cages 30 and 31 are provided in the openings 41 and 42 on the elevator side. A door 49 is provided in the opening 43 on the staircase side.

  The side wall 37 of the elevator side housing 23 and the one wall 24 of the main body side housing 22 are separated by a distance L2, and a joint space 52a is interposed. A first wall expansion joint device 51 is provided to close the joint space 52a and allow displacement in the direction of approaching and separating from each of the walls 24 and the side walls 37 (left and right in FIG. 1). Moreover, the side wall 39 of the elevator side housing 23 and the other wall 25 of the main body side housing 22 are separated by a distance L3, and the joint space 52b is interposed. A second wall expansion joint device 53 is provided to close the joint space 52b and allow displacement in the direction of approaching and separating from the other wall 25 and the side wall 39 (left and right direction in FIG. 1).

  The first wall expansion joint device 51 has edge members 56 and 57 fixed to the wall 24 and the side wall 37, respectively, and one edge member 56 about a vertical axis perpendicular to the paper surface of FIG. A cover plate 59 that is freely connected, a telescopic support body 62 that is pivotally connected to the respective edge members 56 and 57 by hinges 60 and 61 around a vertical axis, and constitutes a pantograph-like link, and a telescopic support body 62 Further, both ends of the metal fittings 63 and 64 are locked inwardly in the lower part of FIG. 1, and a refractory belt 65 made of a refractory material having flexibility and elasticity is included.

  The second wall expansion joint device 53 is also configured in the same manner as the first wall expansion joint device 51, and corresponding portions are denoted by the same reference numerals, and description thereof is omitted to avoid duplication. .

  The front wall 35 is spaced apart from the floor structure 50 constituting the floor of the main body side housing 22 at a distance L1 similar to that of the pillar 26 in the left-right direction (vertical direction in FIG. 1), and the gap 40 is interposed. . The gap 40 is between the wall surfaces 27 and 28 of the walls 24 and 25 arranged between the front wall 35 and the floor structure 50 and on both the left and right sides in FIG. 1 with respect to the elevator side housing 23 of the main body side housing 22. In order to absorb the relative displacement in the direction of proximity and separation between the floor structure 50 and the front wall 35 and between the column 26 and the front wall 35 as described above. The floor expansion joint device 20 of the present embodiment is provided.

  FIG. 2 is an enlarged cross-sectional view of the expansion joint device for floor 20 as seen from the cutting plane line II-II in FIG. The floor expansion joint device 20 described above is fixed to the opposing portions 70 and 71 of the front wall 35 and the floor structure 50 that are two adjacent housings of the building, and the front wall 35 and the floor structure 50. A pair of rails 72, 73 extending in parallel along the extending direction (direction perpendicular to the paper surface of FIG. 2), and longitudinal ends 74, 75 are movably supported by the rails 72, 73, and A plurality of rotation support means 76 that can expand and contract in accordance with the relative displacement in the direction of approaching and separating from the facing portions 70 and 71 of the front wall 35 and the floor structure 50, and an upper part of each rotation support means 76, A plurality of first support members 78 that are arranged in parallel with each other in the approaching and separating directions and are pin-coupled to the respective rotation support means 76 by pins 77, and the longitudinal lengths of the respective first support members 78. Supports movement along the direction A plurality of second support members 79 that are fixed to each second support member 79 and above the second support member 79 adjacent to one side in the width direction parallel to the approaching and separating directions. A plurality of cover bodies 81 each having a cover portion 80 extending to the side, and interposed between each of the first support members 78 and each of the second support members 79, and slipping between the first support member 78 and the second support member 79. And a guide roller 82 which is a means for reducing friction.

  FIG. 3 is an enlarged cross-sectional view of the vicinity of one rail 72 fixed to the facing portion 70 of the front wall 35. One rail 72 fixed to the facing portion 70 of the front wall 35 is made of a steel material having a substantially L-shaped cross section, and is fixed to a vertical wall surface 88 facing the gap 40 of the facing portion 70 by a plurality of anchor bodies 83. The base 84, the bottom 85 bent at right angles to the lower end of the base 84, and the portion of the bottom 85 that protrudes closest to the floor structure 86 of the main body side housing 22 bends upward at a right angle and rises up. And a rising portion 87. Such a rail 72 extends along the wall surface 88 of the facing portion 70 in the horizontal direction perpendicular to the paper surface of FIG.

  The said rotation support means 76 is implement | achieved by the rotation member 89 which consists of a square pipe which is a hollow member. A sliding member 93 is connected to the lower surface of one end portion in the longitudinal direction of the rotating member 89 by a pin bolt 90, washers 91, 94 and a nut 92 so as to be rotatable around the axis of the pin bolt 90. The sliding member 93 has a substantially C-shaped cross section, a lower flange 95 supported by the bottom portion 85 of the rail 72, an upper flange 96 sandwiched by a lower washer 94 and a nut 92, and an upper flange 96. And a web 98 connected to the lower flange 95 at a right angle and guided by the rising portion 87 of the rail 72.

  In the one rail 72, since the first support member 78 cannot be directly attached to the upper end of the base portion 84 at one end portion in the longitudinal direction of the rotating member 89, the auxiliary support member 100 is fixed by welding. The auxiliary support member 100 has a substantially L-shaped cross section and is made of a steel material that is long in the horizontal direction perpendicular to the paper surface of FIG. 3. The auxiliary support member 100 is arranged in parallel to the base portion 84 of one rail 72 and welded to the base portion 84. The web 101 to be fixed, the lower flange 102 bent at right angles from the lower end portion of the web 101, and the upper flange 103 bent at right angles from the upper end portion of the web 101 to the front wall 95 side.

  A roller guide 104 having a substantially U-shaped cross section and made of a steel material that is long in the horizontal direction perpendicular to the paper surface of FIG. 3 is fixed to the lower flange 102 by screws 103 to guide the guide roller 82.

  The guide roller 82 includes a spherical first rolling element 105, a right cylindrical second rolling element 106 having a vertical axis passing through the rotation center of the first rolling element 105, the first rolling element 105, and the second rolling element. And a bearing holder 107 that rotatably supports 106. The bearing holder 107 is fixed to the lower part of the second support member 79.

  The second support member 79 has a substantially C-shaped cross section and is made of a long steel material in a horizontal direction perpendicular to the paper surface of FIG. 3, and includes an upper flange 110, a lower flange 111, an upper flange 110, and a lower flange 111. And a web 112 connecting the two at one side. A cover body 81 is fixed to the upper flange 110 with screws 113.

  The cover body 81 has a substantially L-shaped cross section and extends to the one side in the width direction beyond the second support member 79 adjacent to the one side in the width direction parallel to the approaching and separating directions. Two adjacent cover bodies 81 cover the gaps between the second support members 79 in a partially overlapping state.

  As shown in FIG. 2, each rotation support means 76 includes a first support member 78 and a second support member 79 which are connected to a pin 77 disposed at the center in the width direction, and are a bolt 113 and a nut 114. Are fixed to each other.

  FIG. 4 is an enlarged cross-sectional view of the vicinity of the other rail 73 fixed to the facing portion 71 of the floor structure 86 on the main body side. The other rail 73 fixed to the facing portion 71 of the floor structure 50 on the main body side is made of a steel material having a substantially L-shaped cross section, and a plurality of anchor bodies are attached to the vertical wall surface 130 facing the gap 40 of the facing portion 71. A base portion 132 fixed by 131, a bottom portion 133 bent at right angles to the lower end portion of the base portion 132, and a portion of the bottom portion 133 that protrudes closest to the facing portion 70 of the front wall 35 and bent upward at a right angle. And a rising portion 134 that rises. Such other rail 73 extends in parallel to the one rail 72 along the wall surface 130 of the facing portion 71 in the horizontal direction perpendicular to the paper surface of FIG.

  A sliding member 136 is connected to the lower surface of the other end in the longitudinal direction of the rotating member 89 by a pin bolt 137, washers 138 and 139 and a nut 140 so as to be rotatable around the axis of the pin bolt 137. The sliding member 136 has a substantially C-shaped cross section, a lower flange 141 supported by the bottom portion 133 of the rail 73, an upper flange 142 sandwiched by a lower washer 139 and a nut 140, and an upper flange 142. And a web 143 that is connected to the lower flange 141 at a right angle and is guided by the rising portion 134 of the rail 73.

  In the other rail 73, since the first support member 78 cannot be directly attached to the upper end of the base 132 at the other longitudinal end of the rotating member 89, the auxiliary support member 145 is fixed by welding. The auxiliary support member 145 has a substantially L-shaped cross section and is made of a steel material elongated in the horizontal direction perpendicular to the paper surface of FIG. 4. The auxiliary support member 145 is arranged in parallel to the base portion 132 of the other rail 73 and welded to the base portion 132. Are fixed in parallel to each other at a distance from the one frame 146 toward the facing portion 70 on the front wall 35 side, and the cross section is substantially L-shaped and perpendicular to the paper surface of FIG. The other frame 147 made of a steel material that is long in the horizontal direction, and a plurality of ribs 148 that are fixed to each frame by welding in the longitudinal direction perpendicular to the paper surface of FIG. 4 and connecting the frames 146 and 147. And have.

  A decorative cover 149 having a substantially U-shaped cross section is attached to the auxiliary support member 145 from above. The decorative cover 149 is fixed to the frames 146 and 147 by screws 150 and 151, respectively. On the decorative cover 149, the cover portion 80 of the cover body 81 is supported so as to be displaceable.

  FIG. 5 is an enlarged cross-sectional view taken along the section line VV of FIG. A bracket 161 is fixed to a wall surface 27 of one wall 24 by an anchor body 160, and a side guide rail 164 is fixed to the bracket 161 by a bolt 162 and a nut 163. One end of the second support member 79 in the longitudinal direction is supported on the side guide rail 164 by a guide roller 165 so as to be movable. The guide roller 165 has the same configuration as the guide roller 82 described above. The other end portion in the longitudinal direction of the second support member 79 is also movably supported on the wall surface 28 of the other wall 25 by the same configuration. In this way, by supporting the both end portions in the longitudinal direction of the second support member 79 by the side guide rails 164, each second support member 79 moves following the displacement in the longitudinal direction of each first support member 78. And the displacement can be allowed in the direction in which the facing portions 70 and 71 approach and separate from each other.

  According to the present embodiment, the plurality of first support members 78 are pin-coupled to the upper portions of the plurality of rotation support means 76 provided between the rails 72 and 73, and the first support members 78 are guided by the guide rollers 82. Each second support member 79 is movably supported, and a cover body 81 is fixed to each second support member 79 to allow displacement in the direction of approaching and separating between the facing portions 70 and 71 due to an earthquake or the like. It is possible to realize a flat road surface with each cover body 81 without causing interference between the first support members 78, interference between the second support members 79 and interference between the cover bodies 81. it can. In addition, as described in relation to the prior art, when the opposing portions 70 and 71 undergo relative displacement in the approaching and separating directions, the moving gaps are formed on both sides in the longitudinal direction of the floor expansion joint device 20. Therefore, it is not necessary to provide the wall surface with a structure for closing the moving gap or a notch for allowing movement of both ends in the longitudinal direction of the floor expansion joint device 20, and the construction is easy. The expansion joint device 20 for a floor can be provided in a region that is surrounded by the wall surfaces 27 and 28 and the floor structures 50 and 54 and that is structurally separated by cost.

  Further, each of the plurality of rotation support means 76, the first support member 78, and the second support member 79 is arranged in a state where they are stacked one above the other, so that other members are inserted as in the prior art. Compared to a member in which an insertion hole is formed, it is not necessary to increase the height of the member in order to ensure an effective cross section, a minimum cross section is required, and a member having a large cross section excluding the insertion hole There is no need to use it, and the weight can be reduced.

  Further, as described above, each of the plurality of rotation support means 76, the first support member 78, and the second support member 79 does not need to use a member having a large cross section in order to secure an effective cross section, and is a thin steel plate. Therefore, the first support member 78 and the second support member 79 are connected to the rotation support means 76 on the rails 72 and 73 fixed to the facing portions 70 and 71, respectively. Can be mounted in an assembled state, facilitating on-site mounting work.

  Further, since guide rollers 82 as means for reducing friction are interposed between the first support members 78 and the second support members 79, the housings suddenly move toward and away from each other due to an earthquake or the like. The second support members 79 can smoothly move in the longitudinal direction with respect to the first support members 78 even if the first support members 78 and the second support members 79 are displaced. A large force does not act due to sliding friction, and deformation and destruction of each first support member 78 and each second support member 79 are prevented.

  Furthermore, each said rotation support means 76 consists of a hollow member, and when the said 1st support member 78 and the 2nd support member 79 connected with the pin 77 arrange | positioned in the width direction center part are fixed, Even if the facing portions 70 and 71 are displaced in the approaching and separating directions, the center first support member 78 and the center second support member 79 are positioned at the center in the width direction between the facing portions 70 and 71. The displacements of the first support members 78 and the second support members 79 in the approaching and separating directions are equalized to the left and right with respect to the central portion in the width direction, and the first support members 78 and the second support members 79 are separated. It is possible to prevent the occurrence of local interference such as a collision between the two.

  FIG. 6 is a vertical sectional view showing a floor expansion joint device 220 according to another embodiment of the present invention. Note that portions corresponding to those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted to avoid duplication. The floor expansion joint device 220 according to the present embodiment replaces the guide roller 82 of the floor expansion joint device 20 according to the above-described embodiment with a space between each first support member 78 and each second support member 79. As means for reducing friction, a sliding sheet body 221 made of synthetic resin is interposed. This synthetic resin is realized by, for example, polytetrafluoroethylene (Teflon (registered trademark)) having high slip and wear resistance.

  Further, in the floor expansion / contraction device 220 of the present embodiment, the reinforcing member 223 is fixed to one side portion of each rotation member 89 by welding in order to increase the bending synthesis of each rotation support means 76, and the rotation member 89. And the reinforcing member 223 constitute each rotation support means 76. The reinforcing member 223 is made of a steel material having a substantially L-shaped cross section, is provided with an L-shaped bent portion spaced downward from the rotating member 89, and is integrated with the rotating member 89, and has a large second moment of inertia or cross section. It has a coefficient and realizes high cross-sectional performance with a simple configuration.

  By fixing the reinforcing member 223 to the rotation member 89 in this way, the insertion hole as in the conventional technique is not formed in the rotation member 89, and therefore the effective cross section of the rotation member 89 is not reduced. Thus, it is possible to realize the rotation support means 76 having a high bending strength. Such a reinforcing member 223 may be similarly provided on the rotation member 89 of the floor expansion joint device 20 of the above-described embodiment. In this case as well, the rotation support means 76 having a larger bending strength can be realized with a simple configuration.

  In this embodiment as well, as in the above-described embodiment, a plurality of first support members 78 are pin-coupled on top of a plurality of rotation support means 76 provided between the rails 72 and 73, Each second support member 79 is movably supported by each first support member 78 by a sliding sheet body 171, and a cover body 81 is fixed to each second support member 79, so that the opposing portions 70, 71 due to an earthquake or the like are between. Of each cover without causing interference between the first support members 78, interference between the second support members 79, and interference between the cover bodies 81. A flat road surface can be realized by the body 81.

  Further, each of the plurality of rotation support means 76, the first support member 78, and the second support member 79 is arranged in a state where they are stacked one above the other, so that other members are inserted as in the prior art. Compared to a member in which an insertion hole is formed, it is not necessary to increase the height of the member in order to ensure an effective cross section, a minimum cross section is required, and a member having a large cross section excluding the insertion hole There is no need to use it, and the weight can be reduced.

  Further, as described above, each of the plurality of rotation support means 76, the first support member 78, and the second support member 79 is a member having an excessively large cross section, for example, a solid cross section member, in order to ensure an effective cross section. Since the bending member 89 and the reinforcing member 223 that can be realized by a bending material such as a thin steel plate can be achieved by using the bending member such as a thin steel plate, it is possible to achieve an extremely high bending composition. It is possible to attach the first support member 78 and the second support member 79 to the rails 72 and 73 in the assembled state by attaching the first support member 78 and the second support member 79 to each other, thereby facilitating the installation work on site. Can be achieved.

  Further, since guide rollers 82 as means for reducing friction are interposed between the first support members 78 and the second support members 79, the housings suddenly move toward and away from each other due to an earthquake or the like. The second support members 79 can smoothly move in the longitudinal direction with respect to the first support members 78 even if the first support members 78 and the second support members 79 are displaced. A large force does not act due to sliding friction, and deformation and destruction of each first support member 78 and each second support member 79 are prevented.

  Furthermore, each said rotation support means 76 consists of a hollow member, and when the said 1st support member 78 and the 2nd support member 79 connected with the pin 77 arrange | positioned in the width direction center part are fixed, Even if the facing portions 70 and 71 are displaced in the approaching and separating directions, the center first support member 78 and the center second support member 79 are positioned at the center in the width direction between the facing portions 70 and 71. The displacements of the first support members 78 and the second support members 79 in the approaching and separating directions are equalized to the left and right with respect to the central portion in the width direction, and the first support members 78 and the second support members 79 are separated. It is possible to prevent the occurrence of local interference such as a collision between the two. In each of the above-described embodiments, the floor expansion joint devices 20 and 220 provided between the facing portions 70 and 71 facing each other of the main body side housing and the elevator side housing of one building have been described. In another embodiment of the present invention, it may be implemented between another frame, a floor structure of a passageway stretched between two adjacent buildings, and a floor structure of each building. It may be implemented between each floor structure of the building.

It is a horizontal sectional view of a part of a building 21 provided with a floor expansion joint device 20 according to an embodiment of the present invention. It is an expanded sectional view of the expansion joint device 20 for floors seen from the cut surface line II-II of FIG. FIG. 6 is an enlarged cross-sectional view of the vicinity of one rail 72 fixed to the facing portion 70 of the front wall 35. 7 is an enlarged cross-sectional view of the vicinity of the other rail 73 fixed to the facing portion 71 of the main body side floor structure 86. FIG. It is the expanded sectional view seen from the cut surface line VV of FIG. It is a vertical sectional view showing a floor expansion joint device 220 according to another embodiment of the present invention. 1 is a vertical sectional view showing a typical conventional expansion joint device 1 for floor. It is a top view which shows the state which the expansion joint apparatus 1 for floors of the prior art displaced to the longitudinal direction.

Explanation of symbols

20,220 Floor expansion joint device 27, 28 Wall surface 35 Front wall 50, 54 Floor structure 70, 71 Opposing portion 72, 73 Rail 76 Rotation support means 77 Pin 78 First support member 79 Second support member 80 Cover portion 81 Cover body 82 Guide roller 223 Reinforcing member

Claims (3)

A pair of rails that are fixed to each facing portion of two adjacent housings of the building and extend in parallel along the extending direction of each facing portion;
A plurality of rotation support means that can be extended and retracted by following the relative displacement in the approaching and separating directions of the opposing portions, with both end portions in the longitudinal direction being movably supported by each rail,
A plurality of first support members arranged in parallel to each other at an interval in the approaching and separating directions on the upper part of each rotation support means, and pin-coupled to each rotation support means;
A plurality of second support members supported by each first support member so as to be movable along the longitudinal direction thereof;
A plurality of cover bodies each having a cover portion that is fixed to each second support member and extends to one side in the width direction beyond the second support member adjacent to one side in the width direction parallel to the approaching and separating directions; The expansion joint device for floors characterized by including.   2. A means for reducing sliding friction between the first support member and the second support member is interposed between each first support member and each second support member. Floor expansion joint device.   Each of the rotation support means is formed of a hollow member whose both ends in the longitudinal direction are guided by the respective rails, and the first support member that is pin-coupled to the center in the longitudinal direction of each of the rotation support means includes a second support member. The floor expansion joint device according to claim 1, wherein the floor is fixed.

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