JP2007321511A - Expansible joint device for floor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expansible joint device for a floor constructing a horizontally continuous flat floor face and being capable of reducing the generation of openings while being capable of permitting large relative displacements among each floor structure by an earthquake or the like even when spaces among each floor structure due to a temperature difference between the summer season and the winter season are changed. <P>SOLUTION: One end section 39a of a movable cover body 41 is connected rotatably around an axis of rotation 40 by a hinge means 42 to an edge material 38a fixed to one floor structure 32a. The other end section 39b of the movable cover body 41 is supported slidably to the edge material 38b fixed to the other floor structure 32b through a sliding supporter 84. An expansion absorber 45 holding a plurality of bearing bars 43 in a freely extensible manner by spring members 44 is fitted between the other end section 39b of the movable cover body 41 and the end wall section 37b of the other edge material 38b. A sudden large displacement guides upwards the other end section 39b of the movable cover body 41 by the sliding guide surface 89 of a guide section 90. A slow small displacement is absorbed by the mutual approaches of each bearing bar 43. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a floor expansion joint device that closes a gap existing as a joint between floor structures of two adjacent buildings and allows relative displacement due to an earthquake between the floor structures.

  FIG. 6 is a vertical cross-sectional view showing a conventional joint material for flooring 1 according to the prior art. In this patent document 1, the left and right side edges of a cover main body 4 that is a movable cover body that is passed through adjacent joints 2 that are gaps and are adjacent to the left and right floors 3a and 3b to cover the joints 2 are illustrated in FIG. 6 is a floor expansion joint device that is configured to always urge the movable water-passing side bodies 5a and 5b that can advance and retreat along the width direction that is the left-right direction of 6 by the spring members 6a and 6b. It is described as a floor joint cover body 1.

  The movable water flow side parts 5a and 5b have a plurality of edge side plates 7a and 7b disposed at predetermined intervals along the left and right side edges of the cover main body 4, and each of the plurality of edge side plates 7a and 7b. The base portions of the plurality of sliding shafts 8a and 8b are fixed to each other. Each of the two edge side plates 7a and 7b located inside, the left and right end plates 9a and 9b of the cover main body 4, and the bearing plates 10a and 10b disposed inside the end plates 9a and 9b are arranged in the width direction. Through-holes are formed, and the sliding shafts 8a and 8b are inserted into the through-holes so as to be able to advance and retract, and fitting rings 11a and 11b are fitted into the sliding shafts 8a and 8b, respectively. , 8b are retained. Further, the spring members 6a and 6b are interposed between the sliding shafts 8a and 8b and the bearing plates 10a and 10b, and the sliding shafts 8a and 8b are always outside by the spring force of the spring members 6a and 6b. Spring-biased.

  The cover main body 4 is composed of the left and right end plates 9a and 9b, front and rear end plates 12a and 12b that connect the left and right end plates 9a and 9b at both longitudinal ends perpendicular to the paper surface of FIG. The inside of the box is formed into a box shape, and the inside thereof is partitioned vertically by the partition plate 14, the bearing plates 10 a and 10 b are provided in the lower space 15, and the tile 18 is attached to the upper space 16 by the mortar 17. A floor finish 19 is accommodated.

  Such a cover main body 4 is mounted on leg rods 20a, 20b fixed to the lower portions of the respective edge side plates 7a, 7b, and movable water-permeable side bodies 5a, 5b including these leg rods 20a, 20b. The cover main body 4 constitutes a floor joint cover body 1. The floor joint cover body 1 configured as described above is made of a rubber plate on the receiving frames 21a and 21b which are edge members fixed to the corners of the floors 3a and 3b facing each other through the joint 2. Both side portions where the movable water-permeable side portions 5a and 5b are arranged are supported via the buffer members 22a and 22b.

  Thus, in this prior art, the movable water-permeable side parts 5a and 5b that can advance and retreat along the width direction are provided at both side edges in the width direction of the cover main body 4, and each of the plurality of edge-side plates 7a, Rain water and floor cleaning sewage can flow into the joint 2 from the gap for water flow between the joints 7b and be drained, and upward from the receiving frames 21a and 21b to both side edges of the cover main body 4 in the width direction. The floor joint cover body 1 provided with the respective movable water flow side bodies 5a, 5b is pulled up to open the joint 2 so that maintenance inspection and cleaning in the joint 2 can be easily performed. ing.

JP-A-10-88672

  In the prior art, the movable water-permeable side bodies 5a and 5b provided at both side edges of the cover main body 4 are arranged in such a direction that each of the plurality of edge side plates 7a and 7b reduces the gaps Δa and Δb between the side plates. By being close to each other, the floors 3a and 3b are configured to absorb relative displacement in the direction in which the floors 3a and 3b approach each other. Therefore, when the plurality of edge side plates 7a and 7b abut each other, the cover main body 4 abuts each other, The cover main body 4 and each of the edging side plates 7a and 7b are destroyed by being compressed by the pressing force from each of the floors 3a and 3b via the plurality of edging side plates 7a and 7b. Therefore, the configuration of the floor joint cover body 1 cannot absorb the relative displacement in the direction in which the floors 3a and 3b approach each other beyond the total width of the gaps between the plurality of edge side plates 7a and 7b.

  Therefore, in this conventional technique, the floor surface of each floor 3a, 3b and the upper surface of the floor joint cover body 1 are substantially coplanar, and the flat continuity of the floor surface between each floor 3a, 3b is achieved. However, since the gaps are always generated by the intervals Δa and Δb in the initial state of the installation on the rim side plates 7a and 7b of the movable water-transmitting side bodies 5a and 5b, A heel or the like may be inserted into the gap, and smooth walking may be impaired.

  Further, when the distances Δa and Δb between the edge side plates 7a and 7b are increased, when the building is a hospital, when the patient transfer bed such as a stretcher passes over the edge side plates 7a and 7b, the patient transfer bed This causes a problem that the vibration is transmitted to the patient being transported and the medical device mounted on the patient transport bed.

  Such troubles not only in hospitals, but also in other buildings, such as nursing homes, factories and laboratories, give vibrations or shocks to transport carts that carry precision parts and mechanically fragile objects. Cause. Therefore, it is preferable that the gap in the passage is as small as possible, and such a floor expansion joint device is desired.

  Furthermore, since each frame of each building is a concrete structure, each frame repeatedly undergoes slow thermal expansion and contraction in a yearly cycle due to temperature differences caused by differences in the amount of solar radiation in summer and winter. A change occurs in the horizontal interval W between 3a and 3b. This change corresponds to a difference ΔW (= W1−W2) between the intervals W1 and W2, where the interval in the summer is W1 and the interval in the winter is W2. Although this difference ΔW depends on the scale and structure of each building, as an example, it is about 10 mm to 20 mm.

  Such a difference ΔW in the interval W due to the temperature difference between summer and winter is also absorbed by each of the movable water-passing side bodies 5a and 5b described above, that is, as a change in the interval Δa and Δb between the edge side plates 7a and 7b. Therefore, there is a problem that the allowable amount that can absorb the expansion and contraction displacement due to the earthquake or the like is further reduced.

  An object of the present invention is to always maintain a horizontal and continuous flat floor surface, to reduce the generation of gaps, and to allow a change in the spacing between floor structures due to a temperature difference between summer and winter. Another object of the present invention is to provide a floor expansion joint device capable of absorbing a large relative displacement between floor structures due to an earthquake or the like.

The present invention is fixed to each corner of two floor structures facing each other with a gap in the first horizontal direction below the floor surface of each floor structure, and the bottom and the first horizontal of the bottom Left and right edge members extending in a second horizontal direction perpendicular to the first horizontal direction, and a wall portion rising upward from an end portion farthest in the direction;
A movable cover body having one end portion rotatably connected to one edge member around a rotation axis parallel to the second horizontal direction, and the other end portion supported by the other edge member;
Hinge means for connecting the one end of the movable cover body to one edge member so as to be rotatable about the rotation axis;
A plurality of bearing bars interposed between the other end portion of the movable cover body and the wall portion of the other edge member and arranged parallel to each other along the second horizontal direction, and directions in which the bearing bars are separated from each other And an expansion / contraction absorber having a biasing member that resiliently biases the elastic expansion joint device.

  According to the present invention, the edge material is fixed to each corner of the two floor structures facing each other with a gap in the first horizontal direction below the floor surface of each floor structure. These rim members have a bottom portion and a wall portion, and extend in a second horizontal direction orthogonal to the first horizontal direction. One edge of the movable cover body is connected to one edge member by a hinge means so as to be rotatable about a rotation axis parallel to the second horizontal direction. The other end portion of the movable cover body is supported by the bottom portion of the other edge member.

  A stretchable absorber is interposed between the other end of the movable cover body and the wall of the other edge member. The stretchable absorber is configured to elastically urge a plurality of bearing bars in a direction away from each other by an urging member. Therefore, when the bearing bars are pressed in directions close to each other, the bearing bars can be displaced and reduced in a direction to reduce the interval between the bearing bars against the elastic force of the biasing member. . Further, when the pressing force in the direction close to each other on each bearing bar is released, each bearing bar is displaced and expanded in the direction of increasing the interval between the bearing bars by the elastic recovery force of the urging member. Can do.

  When each floor structure is relatively displaced in a direction away from each other due to a sudden earthquake or the like, the movable cover body is displaced along with one floor structure in a direction away from the other floor structure. Since the end portion is supported by the other rim material, the gap can be maintained in a closed state. In addition, when the floor structures are relatively displaced in a direction close to each other due to the sudden earthquake or the like, the movable cover body is displaced in a direction close to the other floor structure together with one floor structure, and as a result, The other end portion of the movable cover body presses the bearing bar facing the other end portion.

  When each bearing bar is pressed by the other end of the movable cover body, each bearing bar is displaced in a direction close to each other according to the pressing force, but is supported in a direction against the pressing direction by the urging member. Therefore, after the other end portion of the movable cover body is moved by a predetermined distance in the pressing direction by the stretchable absorber, the movement is stopped. The predetermined distance is a total value of the thickness of each bearing bar and the reduced length of the biasing member.

  In the case of a large earthquake with a very low frequency of occurrence, the other end of the movable cover body is relatively displaced in the direction in which each floor structure suddenly and greatly approaches, and as described above, the other end of the movable cover body After the telescopic structure is pressed and the bearing bars are displaced until they are closest to each other, the other end of the movable cover body is displaced upward so as not to be restricted by the bottom of the telescopic absorber and the other edge member. At substantially the same time, the bearing bars are displaced and returned in the direction of increasing the mutual distance by the elastic recovery force of the urging member.

  In this way, a sudden and large relative displacement between floor structures due to a large earthquake or the like is allowed when the other end of the movable cover body rides on the telescopic structure, and is movable as in the prior art. The cover body is sandwiched between the floor structures and is prevented from being compressed and destroyed, and the gap is kept closed by the movable cover body so that the floor structures are smoothly approached. Relative displacement to can be allowed.

  Furthermore, the relative displacement due to the temperature difference between the summer and winter of each floor structure is a slight displacement of about 10 mm to 20 mm that slowly increases and decreases every year. In such relative displacement, the pressing force received by the bearing bar facing the other end from the other end of the movable cover body is transmitted to all the bearing bars via the spring member and displaced in the pressing direction. It degenerates in the pressing direction. As a result, the continuity and flatness of the passages are maintained while the movable cover bodies do not rotate and the floor surfaces of the respective floor structures and the upper surfaces of the movable cover bodies are maintained in substantially the same plane. The slow relative displacement in the approaching direction is allowed, and the gap can be kept closed.

  In this way, a slow and small relative displacement caused by a temperature difference or the like can be allowed without impairing the flatness and continuity of the floor surface, and the gap can be kept closed.

  According to the present invention, the stretchable absorbent body is provided with a guide portion having a sliding guide surface for guiding the other end portion of the movable cover body upward as the other end portion of the movable cover body approaches. And

  According to the present invention, since the sliding guide surface is provided on the stretchable absorbent body, even if the other end of the movable cover body suddenly presses the stretchable absorbent body due to abrupt and large relative displacement, the movable cover body The other end portion of the movable cover body is smoothly guided upward by the sliding guide surface, and the interference of the movable cover body with the expansion / contraction absorber and the other edge member can be further reliably prevented.

  Further, the present invention is characterized in that the other edge member is provided with a retreat space in which each sliding shaft retreats when the stretchable absorber is contracted in the first horizontal direction.

  According to the present invention, since the other rim material is provided with a retreat space, when the movable cover body presses the stretchable absorber in the first horizontal direction due to an earthquake or a change in temperature, the stretchable absorber is reduced. Each bearing bar is displaced in a direction close to each other, and due to this displacement, the protruding portion of each sliding shaft protruding from each bearing bar is inserted into the retreat space, and each sliding shaft interferes with the other edge member. It is prevented.

  Furthermore, the present invention is characterized in that each of the bearing bars arranged on both sides in the first horizontal direction of the stretchable absorber is restrained from displacement in the first horizontal direction by the other edge member.

  According to the present invention, each bearing bar arranged on both sides in the first horizontal direction of the stretchable absorber is restrained from displacement in the first horizontal direction with respect to the other edge material. Even if the movable cover body presses the stretchable absorber in the first horizontal direction, it is possible to prevent the entire stretchable absorbent body from being displaced with respect to the other edge member and coming off from the intended position. By this, when the movable cover body presses the expansion / contraction absorber, the expansion / contraction absorber can be reliably reduced, and the movable cover body can reliably absorb the relative displacement in the direction approaching the expansion / contraction absorber by the expansion / contraction absorber. it can.

  According to the present invention, the movable cover body is movably connected to one edge member by the hinge means for the relative displacement in the approaching direction between each of the sudden and large single floor structures due to the occurrence of an earthquake or the like. The other end portion of the movable cover body can be rotated away from the other edge member and the stretch absorber, that is, there is no restraint, and the movable cover body interferes with the other edge member and the stretch absorber. By avoiding this, it is possible to allow relative displacement in the direction in which the floor structures approach each other. Also, the relative displacement in the direction in which the floor structures approach each other due to the temperature difference between summer and winter is a small amount of displacement, but slowly increases and decreases periodically over a period of one year. Therefore, the movable cover body does not rotate, and therefore the other end of the movable cover body presses the stretchable absorber while maintaining the continuity of the upper surface of the movable cover body with each floor surface of each floor structure. The stretchable absorber is degenerated by the pressing force and absorbs the relative displacement. As a result, it is possible to allow both long-term and small relative displacements that are abrupt due to earthquakes and the like due to large relative displacement and temperature difference while maintaining the continuity and flatness of the floor surface, and the state where the gap is closed. can do.

  According to the present invention, since the elastic guide is provided with the sliding guide surface, the other end of the movable cover is guided onto the elastic absorber, whereby the elastic absorber of the movable cover and the other edge member. Can be reliably prevented.

  Further, according to the present invention, since the other edge member is provided with a retreat space, when the floor structures are displaced relative to each other due to an earthquake or the like, the expansion / contraction absorber is pressed by the movable cover body. Each bearing bar is displaced in a direction close to each other, and even if the sliding shaft is further displaced by the displacement of each bearing bar, the sliding shaft interferes with the other edge member and is damaged or deformed. This prevents the inconvenience that the stretchable absorber cannot be stretched smoothly.

  Further, according to the present invention, the bearing bars on the both sides in the first horizontal direction of the stretchable absorber are restrained by the other rim material, so that the movable cover body moves the stretchable absorber to the first horizontal due to an earthquake or a change in temperature. Even when pressed in the direction, the entire stretchable absorber is prevented from being displaced with respect to the other edge material, and the stretchable absorber is reliably reduced by the pressing force from the movable cover body, and the approaching direction Can be reliably absorbed by the stretchable absorber.

  FIG. 1 is a vertical sectional view showing a floor expansion joint device 31 according to an embodiment of the present invention. The floor expansion joint device 31 of the present embodiment is provided at each corner portion 33a, 33b of the two floor structures 32a, 32b facing each other with a gap G in the first horizontal direction X1 which is the left-right direction in FIG. The floor structures 32a and 32b are fixed below the floor surfaces 34a and 34b, respectively, and the bottom portions 35a and 35b and the bottom portions 35a and 35b are located upward from the one end portions 36a and 36b farthest in the first horizontal direction X1. Two edge members 38a, 38b extending in a second horizontal direction X2 (perpendicular to the plane of FIG. 1) perpendicular to the first horizontal direction X1, One end 39a is connected to one edge member 38a so as to be rotatable around a rotation axis 40 parallel to the second horizontal direction X2, and the other end 39b is supported by the other edge member 38b. 41 and movable cover body Hinge means 42 for connecting the one end portion 39a to one edge member 38a so as to be rotatable around the rotation axis 40; the other end portion 39b of the movable cover body 41; and the parting wall of the other edge member 38b. And a stretchable absorber 45 interposed between the portion 37b.

  The stretchable absorber 45 has a plurality of bearing bars 43 arranged in parallel to each other along the second horizontal direction X2 and spring members 44 that are biasing members mounted between the bearing bars 43. . The bearing bars 43 are spring-biased in such a direction as to be separated from each other by the stretchable absorber 45. Each of the spring members 44 is realized by a compression coil spring.

  Each of the floor structures 32a and 32b is a frame that constitutes a floor of a building, and is made of a concrete structure such as a slab. The opposing wall surfaces 46a and 46b facing each other with respect to the first horizontal direction X1 of the floor structures 32a and 32b extend in parallel in the substantially vertical direction perpendicular to the paper surface of FIG. 1 and the second horizontal direction X2, and these The corners 33a and 33b are located in the vicinity of portions where the opposing wall surfaces 46a and 46b and the substantially horizontal floor surfaces 34a and 34b of the floor structures 32a and 32b intersect. The opposing wall surfaces 46a and 46b are separated by the gap G in the first horizontal direction X1 with an interval of, for example, 100 mm to 500 mm. Such a gap G is a space that exists as a joint between the buildings.

  The movable cover body 41 includes a flat panel body 51, a hanging parting material 52 fixed to one end of the panel body 51, and a door end parting material 53 fixed to the other end of the panel body 51, It is comprised by the decorative member 54 joined over the panel main body 51 over the suspension source parting material 52 and the door-end parting material 53. FIG. The panel main body 51 is made of, for example, a steel plate, and its side edge is fixed to the hanging parting material 52 by screws 40, and the decorative member 54 is on the surface facing the upper side of the panel main body 51 (upper side in FIG. 1). Affixed. The decorative member 54 may be realized by a decorative panel made of polyvinyl chloride having a thickness of 3 mm, for example, or may be realized by other decorative materials.

  The hanging parting material 52 is realized by a long extruded steel material or an aluminum alloy extruded material extending in the second horizontal direction X2 perpendicular to the paper surface of FIG. It has a mating recess 55 and a second hinge piece 93 having a generally inverted U-shaped cross section into which a hinge pin part 77 of a first hinge piece 75 described later is fitted. These first and second hinge pieces 75 and 93 constitute the hinge means 42.

  The door end parting material 53 is close to the hanging parting material 52 from the contact part 56 having a substantially triangular cross section and the upper end portion of one side of the contacting part 56 facing the hanging parting material 52. In the same manner as the hanging parting material 52, the protrusion part 57 protrudes in the direction to be extended, and is realized by a long extruded shape steel material or an extruded shape material of aluminum alloy.

  The contact portion 56 is inclined with respect to the thickness direction (vertical direction in FIG. 1) of the movable cover body 41 from the lower surface 58 facing the gap G toward the upper surface 59 facing upward as the distance from the hanging parting material 52 increases. An inclined surface 60 is formed from the lower surface 58 to the upper surface 59 of the movable cover body 41. As will be described later, when the floor structures 32a and 32b are relatively displaced in a direction close to each other in a state where the inclined surface 60 is in contact with the sliding guide surface 89 of the stretchable absorber 45, the movable cover body 41 is provided. The other end 39b can be guided upward as indicated by the phantom line 61 to avoid collision with the stretchable absorber 45.

  FIG. 2 is an enlarged cross-sectional view of one edge member 38a and the vicinity thereof. The bottom portion 35a of the one edge member 38a is locked in a state of being mounted on the liner plate 63a extending in the second horizontal direction X2. The liner plate 63a is embedded in one corner portion 33a in a substantially horizontal installation surface formed by retracting below the floor surface 34a, and is fixed to the anchor body 62a by welding. The parting wall portion 37a is vertically formed at one end portion 36a on the side away from the gap G in the first horizontal direction X1 of the bottom portion 35a and rises up to the floor surface 34a. Such one edge member 38a is realized by an extruded shape member made of a long extruded shape steel material or an aluminum alloy.

  The bottom 35a includes a flat base 64a, a substantially L-shaped first leg 65a projecting from the lower surface of one end of the base 64a, and a substantially L projecting from the lower surface of the other end of the base 64a near the gap G. A second leg portion 66a having a letter shape, a third leg portion 67a projecting downward from the lower surface in the vicinity of the central portion in the width direction of the base portion 64a, and the second leg portion 66a are formed integrally with the other end portion of the base portion 64a. And a fitting section 69a having a concave cross-section to which one end of the water-stop sheet 68 is fitted.

  The first and second leg portions 65a and 66a have tongue-like portions 70a and 71a extending in directions close to each other, and the tongue-like portions 70a and 71a are fixed or integrally formed with the liner plate 63a. Engage with a plurality of pairs of locking pieces 72a and 73a and are locked to the liner plate 63a.

  On the upper surface of the base part 64a, a first hinge piece 75 that rises perpendicularly to the base part 64a in parallel with the parting wall part 37a is integrally formed near one end where the parting wall part 37a continues. The first hinge piece 75 includes a rising portion 76 that rises in parallel to the parting wall portion 37a and perpendicular to the base portion 64a, and a cylindrical hinge pin portion 77 that is integrally formed at the upper end of the rising portion 76. Consists of. The hinge pin portion 77 extends along the rotation axis 40 parallel to the second horizontal direction X2, and is formed by retracting below the floor surface 34a of one floor structure 32a.

  According to such a configuration, when the movable cover body 42 is dropped from above, when the hinge pin portion 77 of the first hinge piece 75 is dropped into a recess of the second hinge piece 93 described later of the hanging parting material 52. The movable cover body 41 is fitted almost at the same time, and the movable cover body 41 can be easily and accurately positioned and installed in an attachment position that covers the gap G from above over the respective edge members 38a and 38b.

  FIG. 3 is an enlarged sectional view of the other edge member 38b and the vicinity thereof. Referring also to FIG. 1, the bottom portion 35 b of the other edge member 38 b is formed in a flat plate-like base portion 64 b and one end portion of the base portion 64 b, and a concave shape in which the other end portion of the water-stop sheet 68 is fitted. Fitting portion 69b, a substantially L-shaped first leg portion 65b projecting from the lower surface of the other end of the base portion 64b, and a second projecting from the lower surface of the base portion 64b and integrally formed with the fitting portion 69b. A leg portion 66b and three third leg portions 67b formed to protrude from the lower surface at an intermediate portion between both end portions in the width direction of the base portion 64b.

  The first and second leg portions 65b and 66b have tongue-like portions 70b and 71b extending in directions close to each other, and each tongue-like portion 70b and 71b is fixed to or integrally formed with the liner plate 63b. The pair of locking pieces 72b and 73b are engaged and locked.

  The other edge member 38b is buried and installed in a substantially horizontal installation surface formed by retracting below the floor surface 34b at the other corner portion 33b, and fixed to the anchor body 62b by welding. Locked to the liner plate 63b.

  The parting wall portion 37b rises upward and is integrally formed at the other end portion of the base portion 64b. The parting wall portion 37b has a rising portion 78 that rises vertically from the upper surface of the other end portion of the base portion 64b, and an overhang portion 79 that is continuous from the upper end portion of the rising portion 78 to the side close to the one edge member 38a. In the overhang portion 79, a holding surface 82 that is inclined downward toward the proximal end portion 81 is formed on the free end portion 80 that is disposed closest to the one edge member 38 a.

  Even if the expansion / contraction absorber 45 is pressed in the direction close to the parting wall portion 37b by the movable cover body 41, such a pressing surface 82 is lifted by the expansion / contraction absorber 45 being displaced upward from the other edge member 38b. To prevent it. The other edge member 38b also includes a sliding support 84 that is fixed to the one end portion of the base portion 64b by a screw 83 while partially protruding from the other opposing wall surface 46b. The sliding support 84 includes a strip-shaped base 85 made of steel or an aluminum alloy, and a sliding sheet member 86 bonded to the upper surface of the base 85. The sliding sheet member 86 may be realized by a sheet material made of, for example, polytetrafluoroethylene or polypropylene having good sliding properties. Such a sliding support body 84 supports the other end portion 39b of the movable cover body 41 from below, and improves the smoothness of displacement of the movable cover body 41 in the first and second horizontal directions X1 and X2. . The other edge member 38b is realized by a long extruded shape steel material or an extruded shape material made of an aluminum alloy, like the one edge material 38a described above.

  In the other edge member 38b, the sliding shaft 87 connecting the bearing bars 43 is retracted when the stretchable absorber 45 is reduced in the width direction (first horizontal direction X1 in FIGS. 1 to 3). A retreat space 94 surrounded by the base portion 64b, the parting wall portion 37b, and the overhang portion 79 is provided. For this reason, even if the expansion / contraction absorber 45 contracts in the width direction and the sliding shaft 87 is displaced toward the parting wall part 37b, the sliding shaft 87 is prevented from interfering with the parting wall part 37b to be damaged or deformed. Each of the bearing bars 43, which will be described later, allows displacement in the direction of approaching and separating from each other, and the expansion / contraction absorber 45 is required to expand and contract reliably even with a pressing force acting suddenly such as an earthquake. On the other hand, reliability is improved.

  The stretchable absorber 45 includes a plurality of (6 in the present embodiment) bearing bars 43 having a substantially I-shaped cross section, a plurality of spring members 44 interposed between the bearing bars 43, and bearings. The flange portion of the bar 43 is loosely passed in the thickness direction (first horizontal direction X1 in FIGS. 1 to 3), and is interposed between the plurality of sliding shafts 87 for binding the bearing bars 43 and the bearing bars 43. And a plurality of insertion members 88 having elasticity and elasticity. The bearing bars 43 are allowed to pass through the flange portions at intervals in a second horizontal direction perpendicular to the paper surface of FIG. Can be moved in the direction of approaching and moving away from each other, that is, in the first horizontal direction X1.

  Each bearing bar 43 includes a first bearing bar 43a disposed closest to the other end 39b of the movable cover body 41, and a second bearing bar 43b and a third bearing bar in a direction away from the first bearing bar 43a. The bar 43c, the fourth bearing bar 43d, the fifth bearing bar 43e, and the sixth bearing bar 43f are arranged in parallel with each other at an interval δ in the first horizontal direction X1. This interval δ is assumed to be an interval that does not fit the garbage, coins dropped by passers-by, passers-by, small items such as writing instruments, and shoes such as high heels, and is selected to be, for example, 2 mm to 4 mm. In addition, when naming these 1st-6th bearing bars 43a-43f generically, it only describes as "the bearing bar 43."

  A guide portion 90 having a sliding guide surface 89 for guiding the other end portion 39b of the movable cover body 41 upward is formed on the upper portion of the first bearing bar 43a. The guide portion 90 has a substantially trapezoidal cross section, and is inclined downward as the sliding guide surface 89 approaches the one edge member 38a. Such a sliding guide surface 89 forms an inclination angle θ1 of about 30 ° to about 60 ° with respect to the horizontal plane in a state where the other edge member 38b is installed on the floor structure 32b. It is substantially the same as the inclination angle θ2 with respect to the lower surface 58 of the inclined surface 60 of the door end parting material 53.

  As shown in FIGS. 1 to 3, in a state where the movable cover body 41 is horizontally installed across the edge members 38 a and 38 b, the upper surface 59 of the movable cover body 41 is the floor surface of each floor structure 32 a and 32 b. 34a and 34b are present in a common plane, and the sliding guide surface 89 is in contact with the region near the upper surface 59 of the inclined surface 60 of the movable cover body 41 so as to be opposed to each other. When the body 41 moves in the first horizontal direction X1 in the direction approaching the stretchable absorber 45, the sliding guide surface 89 of the stretchable absorbent body 45 is pressed by the inclined surface 60 of the movable cover body 41, and the movable cover body 41 is moved. Guided upward.

  A receiving surface 91 with which the pressing surface 82 of the overhanging portion 79 abuts is formed on the upper portion of the sixth bearing bar 43f. The receiving surface 91 forms an inclination angle θ3 of about 45 ° with respect to the horizontal plane, and is substantially the same as the angle θ4 formed by the pressing surface 82 of the overhang portion 79 with the horizontal plane.

  The first bearing bar 43a and the sixth bearing bar 43f are configured symmetrically with respect to a vertical virtual plane perpendicular to the first horizontal direction X1, and are formed by cutting the same material into a predetermined length. It is arranged in an inverted manner and can be realized by a common extruded shape steel material. The remaining second to fifth bearing bars 43b to 43e are also made of an extruded steel material having an I-shaped cross section, and can be formed by cutting a common material into a predetermined length.

  Each of the aforementioned spring members 44 is composed of a compression coil spring having the same length having a spring force that is easily compressed by the pressing force from the movable cover body 41. In a state where the pressing force from the movable cover body 41 does not act on the first bearing bar 43a or in a very slight state, each bearing bar 43 maintains the initial interval δ at the time of installation and does not move. When this pressing force increases, the bearing bars 43 move in directions close to each other against the spring force of the spring members 44, specifically, the first to fifth bearing bars 43a to 43e are changed to the sixth bearing bar 43f. It slides and displaces on the base 64b in the direction approaching. Eventually, when all the bearing bars 43a to 43e come into contact with each other and each interval δ becomes 0 mm, each bearing bar 43 can no longer be displaced, so that the inclined surface 60 of the other end portion 39b of the movable cover body 41 is reached. Is guided upward by the sliding guide surface 89 and moves the other end 39b of the movable cover body 41 upward. As a result, the movable cover body 41 rotates about the rotation axis 40 counterclockwise as indicated by a virtual line in FIG. While maintaining the state where G is closed by the movable cover body 41, interference with the other edge member 38b of the movable cover body 41 is prevented, and relative displacement in the direction in which the floor structures 32a and 32b are close to each other is allowed. .

  Each of the aforementioned sliding shafts 87 is slidably inserted through a shaft hole formed in each bearing bar 43, and each bearing bar 43 is secured by a pair of retaining nuts screwed to both ends in the axial direction. They are united. Each sliding shaft 87 is mounted with the spring member 44 between the bearing bars 43, and both end portions of each spring member 44 elastically contact each bearing bar 43 adjacent to both sides and are separated from each other. A spring force is applied in the direction. The insertion members 88 are mounted between the bearing bars 43 so that the sliding shafts 87 and the spring members 44 are fitted.

  FIG. 4 is a partial perspective view showing the insertion member 88. The insertion member 88 is realized by a long material having a rectangular cross section made of foamed synthetic resin or foamed synthetic rubber, and the sliding shafts 87 and the spring members 44 inserted through the bearing bars 43 in the longitudinal direction thereof. A plurality of fitting recesses 92 are formed at the same interval ΔL as the arrangement interval of. Each fitting recess 92 is slightly larger than the outer diameter of each spring member 44 so that when each spring member 44 is compressed, it is sandwiched between the helical portions of each spring member 44 and does not deform. Is formed.

  By interposing such an insertion member 88 between the bearing bars 43, small articles such as coins and writing instruments that have been intruded or dropped by passers-in from the gaps δ between the bearing bars 43 to the inside. Intrusion is prevented, and falling objects can be easily recovered.

  Next, operation | movement of the expansion joint apparatus 31 for floors comprised as mentioned above is demonstrated. Edge members 38a and 38b are provided at the corners 33a and 33b of the two floor structures 32a and 32b facing each other with a gap G in the first horizontal direction X1 from the floor surfaces 34a and 34b of the floor structures 32a and 32b. Are also fixed below. These edge members 38a and 38b have bottom portions 35a and 35b and parting wall portions 37a and 37b, and extend in a second horizontal direction X2 orthogonal to the first horizontal direction X1. One edge 39a of the movable cover body 41 is connected to one edge member 38a by a hinge means 42 so as to be rotatable about a rotation axis 40 parallel to the first horizontal direction X1. The other end portion 39b of the movable cover body 41 is supported on the bottom portion 35b of the other edge member 38b via a sliding support body 84 so as to be smoothly slidable.

  The stretchable absorber 45 is interposed between the other end portion 39b of the movable cover body 41 and the parting wall portion 37b of the other edge member 38b. The stretchable absorber 45 includes a plurality of bearing bars 43 and spring members 44 that are mounted between the bearing bars 43. The bearing bars 43 are spring-biased in a direction away from each other by the spring member 44 in a state of being arranged parallel to each other along the second horizontal direction X2. Accordingly, when the bearing bars 43 are pressed in directions close to each other, the bearing bars 43 are displaced in directions close to each other against the spring force, and can be contracted as a whole.

  In another embodiment of the present invention, instead of the spring member 44, a cylindrical body made of synthetic rubber or soft synthetic resin having high elasticity can be used as an urging member equivalent to each spring member 44. Further, it may be formed integrally with the insertion member 88.

  When each floor structure 32a, 32b is relatively displaced in a direction away from each other due to a sudden earthquake or the like, the movable cover body 41 is displaced along with one floor structure 32a in a direction away from the other floor structure 32b. Since the other end portion 39b of the movable cover body 41 is supported by the other edge member 38b, the gap G can be kept closed. Further, when the floor structures 32a and 32b are relatively displaced in a direction approaching each other due to the sudden earthquake or the like, the movable cover body 41 is displaced in a direction approaching the other floor structure 32b together with the one floor structure 32a. As a result, the other end 39b of the movable cover body 41 presses the bearing bar 43a facing the other end 39b, but the bearing bars 43a to 43e are supported by the spring member 44 in the pressing direction. The other end portion 39 b of the movable cover body 41 is prevented from moving in the pressing direction by the stretchable absorber 45.

  Therefore, the other end portion 39b of the movable cover body 41 is guided and displaced upward by the expansion / contraction absorber 45 and the bottom portion 37b of the other edge member 38b without being restricted in movement, and rotates. In this way, a sudden, large and single relative displacement of the floor structures 32a and 32b due to an earthquake or the like is allowed by the rotation of the movable cover body 41, and the gap G is closed by the movable cover body 41. It is possible to maintain a dangerous opening for traffic.

  The relative displacement caused by the temperature difference between the summer and winter seasons of the floor structures 32a and 32b slowly increases and decreases every one year. The slow relative displacement due to such a temperature difference is a slight displacement of about 10 mm to 20 mm, for example. The relative displacement due to the temperature difference acts on the bearing bar 43a facing the other end portion 39b by the other end portion 39b of the movable cover body 41, and the pressing force from the bearing bar 43a remains through the spring members 44. Are transferred to the bearing bars 43b to 43e and displaced in the pressing direction, and all the bearing bars 43a to 43e are contracted in the pressing direction as a whole.

  Due to the compression displacement of the stretchable absorber 45, the movable cover body 41 does not rotate, and the floor surfaces 34a and 34b of the floor structures 32a and 32b and the upper surface 59 of the movable cover body 41 are kept substantially flush. While maintaining the continuity and flatness of the passage, the gap G is closed by the movable cover body 41 while allowing the relative displacement in the slow approaching direction due to the temperature difference between the floor structures 32a and 32b. Can be maintained.

  In this manner, both the flat and continuous continuity of the floor surfaces 34a and 34b can be obtained by using both a rapid and large and single relative displacement such as an earthquake and a slow and small and continuous relative displacement caused by a temperature difference. It is allowed without damage, and the gap G can be kept closed.

  Further, since the sliding guide surface 89 is provided on the stretchable absorbent body 45, even if the other end portion 39b of the movable cover body 41 abruptly presses the stretchable absorbent body 45 due to abrupt and large relative displacement, the movable cover can be moved. The other end 39b of the body 41 is smoothly guided upward by the sliding guide surface 89, and the interference of the movable cover body 41 with the stretchable absorber 45 and the other edge member 38b can be prevented more reliably. it can.

  FIG. 5 is a vertical sectional view in the vicinity of the expansion / contraction absorber 45a showing the floor expansion joint device 31a 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. In the above-described embodiment, the inclined surface 60 is formed on the door end parting material 53 of the movable cover body 41, and the sliding guide surface 89 is formed on the bearing bar 43 a disposed closest to the gap G of the stretchable absorber 45. When the floor structures 32a and 32b are relatively displaced in the direction approaching the first horizontal direction X1, the inclined surface 60 of the movable cover body 41 is guided upward by the sliding guide surface 89 of the stretchable absorber 45. However, in this embodiment, in addition to the inclined surface 60a of the movable cover body 41a, the guide member 104 is provided on the lower surface 58 of the movable cover body 41a, and is slidably supported on the bottom 35 of the other edge member 38b. A body 84a and a sliding projection 106 are provided.

  The length of the sliding support 84a in the first horizontal direction X1 is determined by the size of the gap G, and the movable cover body 41a is moved in consideration of the expansion allowance of the expansion joint device 31a and the variation amount of the gap G. It is set to a length that can be supported.

  When the guide member 104 is attached to the lower surface of the movable cover body 41a, the first attachment section 120, the wall section 121, and the contact section 122 are arranged from one end 39a to the other end 39b of the movable cover body 41a. And the 2nd attaching part 123 is integrally formed in a row in this order. The contact portion 122 has an inclined surface 124 that is inclined at an angle θ11 with respect to the lower surface 58 of the movable cover body 41a. The angle θ11 of the inclined surface 124 is selected from 30 ° to 45 °.

  Such a guide member 104 is made of a processed material obtained by bending a structural steel plate or a stainless steel plate, and is fixed to the lower surface 58 of the movable cover body 41a by a screw member such as a bolt or welding at a distance in the second horizontal direction X2. Is done. The attachment position of the guide member 104 to the movable cover body 41a is a total value δ · n corresponding to the number n (5 in the present embodiment) of gaps δ between the bearing bars 43 of the stretchable absorber 45a. The guide member 104 is inclined at the upper corner 126 of the sliding projection 106 on the gap G side with respect to the maximum contraction amount W (= δ · n) in which the stretchable absorber 45a is movable in the first horizontal direction X1. When the moving distance of the movable cover body 41a until the initial contact point 127 of the surface 124 contacts or comes into contact is L10, W ≦ L10 is selected.

  The inclined surface 60a formed on the door end parting material 53a of the movable cover body 41a is inclined with respect to the lower surface 58 from the one end 39a toward the other end 39b toward the upper surface 59 at an angle θ12. The angle θ12 is set to a value smaller than the angle θ1 of the inclined surface 60 of the movable cover body 41 of the above-described embodiment, and is selected from 15 ° to 30 °, for example. A contact surface 127 extending toward the upper surface 59 is formed substantially perpendicular to the upper surface 59 on the upper edge of the inclined surface 60a on the upper surface 59 side. Such an abutment surface 127 is formed on the receiving surface 128 of the guide portion 90 of the bearing bar 43a that is disposed closest to the gap G of the stretchable absorber 45a in the initial installation state where the movable cover body 41a is horizontally disposed. Opposing and abutting. The receiving surface 128 is perpendicular to the upper surface 129 of each bearing bar 43, and a guide surface 130 that is curved outwardly is formed continuously with the upper edge of the receiving surface 128.

  By forming the guide surface 130 on the bearing bar 43a, the movable cover body 41a can smoothly slide on the guide surface 130 across the contact surface 127, the inclined surface 60a and the lower surface 58, and the movable cover body 41a. The other end 39b is smoothly guided onto the stretchable absorber 45a.

  When the guide surface 124 of the guide member 104 abuts on the upper corner portion 126 of the sliding projection 106, the movable cover body 41a is angularly displaced about the rotation axis 40 of the hinge means 42, and the other end portion 39b is an imaginary line. Move upward as shown at 61a. When the movable cover body 41a further moves to the other floor structure 32b side, the upper edge of the inclined surface 60a of the door end parting material 53a moves upward beyond the upper edge of the receiving surface 128 of the bearing bar 43a. The guide member 104 is movable with respect to the sliding protrusion 106 provided on the other edge member 38b so that the upper edge of the inclined surface 60a faces the curved guide surface 130 of the bearing bar 43a. The attachment position to the cover body 41a is set.

  Between each bearing bar 43, an insertion member 88a having a compression elasticity higher than that of each insertion member 88 of the above-described embodiment by an elastic force corresponding to the spring force of each spring member 44 is interposed. The configuration is simplified by reducing the number of parts.

  The upper flange of the bearing bar 43f that is disposed farthest from the gap G is substantially C that engages from below with an engaging protrusion 140 that is bent in a substantially L shape from the tip of the overhang 79 and hangs down. A character-shaped engagement piece 141 is formed. The distal end portion of the engagement piece 141 is formed to be disposed above the distal end portion of the engagement protrusion 140 in a state where the stretchable absorber 45a is installed on the other edge member 38b. The engagement protrusion 140 and the curved engagement piece 141 are engaged with each other while being engaged with each other, and the stretchable absorber 45a is pulled toward the gap G by a sliding frictional force with the movable cover body 41a. However, it is possible to prevent undesired displacement.

  When the engagement piece 141 is inserted into the engagement protrusion 140, the expansion / contraction absorber 45a may be rotated in the direction of the arrow Z1, and when the engagement piece 141 is detached from the engagement protrusion 140, the expansion / contraction absorption is performed. The body 45a may be rotated in the direction of the arrow Z2. These engagement protrusions and engagement pieces 141 constitute a restraining means for restraining the displacement of the stretchable absorber 45a in the first horizontal direction X1 to prevent detachment and displacement from the edge member 38b. By such a restraining means, the bearing bars 43a and 43f disposed on both sides in the first horizontal direction X1 of the stretchable absorber 45a are restrained in the first horizontal direction displacement by the other edge member 38b. .

  The lower flange of the bearing bar 43a disposed at a position closest to the gap G is an engagement portion 144 of the restraint fitting 143 detachably attached to the base portion 64b of the other edge member 38b by a machine screw 142 and the base portion 64b. And the displacement of the lower flange to the gap G is prevented, and the expansion and contraction absorber 45a is prevented from falling to the gap G side due to the displacement.

  With such a configuration, the stretchable absorber 45a can be maintained at a fixed position of the other edge member 38b. The width B of the entire stretchable absorbent body 45a can be adjusted by changing the mounting position of the restraint fitting 144.

  The above-mentioned “adjustment” means that the width of the space G in the first horizontal direction X1 depends on the season in which the floor expansion joint device 31a is attached, the temperature of the season, and each frame of each building including the floor structures 32a and 32b. It has already changed depending on the degree of dryness. Therefore, it is necessary to determine the dimensions of the expansion / contraction absorber 45a in advance in consideration of the expansion / contraction amount of each housing. If it is attached with the maximum dimension B in the summer, a gap of about 20 mm may be generated between the door end parting material 53a and the bearing bar 43a closest to the gap G due to the contraction of each frame in the winter. The overlap margin between the bearing bar 43a and the restraint fitting 143 is set in consideration of the expansion / contraction allowance in summer and winter. The other edge member 38b is also provided with a retreat space 150 in which each sliding shaft 87 retreats when the expansion / contraction absorber 45a is contracted in the first horizontal direction X1.

  By providing the retreat space 150 in the other edge member 38b, when the movable cover body 41a presses the expansion / contraction absorber 45a due to an earthquake or a change in temperature, and the expansion / contraction absorber 45a contracts, each bearing bar 43a, 43f is displaced against the elastic force of each insertion member 88a in a direction close to each other, and the protruding portion of each sliding shaft 87 protruding from the bearing bar 43f by this displacement is inserted into the retreat space 150, and The sliding shaft 87 is prevented from interfering with the other edge member 38b.

  The expansion / contraction absorber 45a can be attached by contracting the whole in the first horizontal direction X1, engaging the engagement piece 141 with the engagement protrusion 140, and rotating in the arrow Z1 direction. The lower flange of the bearing bar 43a on the gap G side is hooked on the restraint fitting 143. When removing the expansion / contraction absorber 45a from the other edge member 38b, the machine screw 142 is loosened to retract the restraining bracket 143 from the lower flange of the bearing bar 43a, and the expansion / contraction absorber 45a is moved to the opposite arrow. By rotating in the Z2 direction and extracting the engagement piece 141 from the engagement protrusion 140, the stretchable absorber 45a can be detached from the other edge member 38b. In this way, the stretchable absorber 45a can be easily installed on the other edge member 38b and can be removed, so that maintainability is improved. Such a floor expansion joint device 31a has a simple configuration with a reduced number of parts, and is slow, small and continuous due to a sudden and large and single relative displacement and temperature difference such as an earthquake. Both relative displacements are allowed without impairing the flatness and continuity of the floor surfaces 34a and 34b, and the gap G can be maintained closed. Even if the other end portion 39b of the movable cover body 41a suddenly presses the expansion / contraction absorber 45a due to abrupt and large relative displacement, the other end portion 39b of the movable cover body 41a is moved upward by the sliding guide surface 124. Therefore, the amount of push-up of the movable cover body 41a is not limited by the thickness of the movable cover body 41a, and a desired timing is determined depending on the length of the sliding guide surface 127 and the angle θ11. Thus, the movable cover body 41a can be raised, and the interference of the movable cover body 41a with the stretchable absorber 45 and the other edge member 38b can be more reliably prevented.

It is a vertical sectional view showing a floor expansion joint device 31 according to an embodiment of the present invention. It is an expanded sectional view of one edge material 38a and its vicinity. It is an expanded sectional view of the other edge material 38b and its vicinity. FIG. 6 is a partial perspective view showing an insertion member 88. It is a partial vertical sectional view which shows the expansion joint apparatus 31a for floors of the other form of implementation of this invention. It is a vertical sectional view which shows the joint joint cover body 1 for a prior art.

Explanation of symbols

31, 31a Floor expansion joint device 32a, 32b Floor structure 33a, 33b Corners 34a, 34b Floor 35a, 35b Bottom 37a, 37b Wall 38a, 38b Edge material 39a One end 39b The other end 40 Rotating axis 41, 41a Movable cover body 42 Hinge means 43; 43a-43e Bearing bar 44 Spring member 45, 45a Stretch absorber 46a, 46b Opposing wall surface 51 Panel body 52 Suspended parting material 53 Door end parting material 54 Cosmetic member 58 Lower surface 59 Upper surface 60, 60a Inclined surface 64a, 64b Base 84, 84a Sliding support 87 Sliding shaft 88, 88a Insertion member 89 Sliding guide surface 90 Guide portion 91 Receiving surface 104 Guide member 106 Sliding projection 140 Engaging projection 141 Engagement piece 143 Restraint fitting 150 Retreat space X1 First horizontal direction X2 Second horizontal direction G gap

Claims (4)

At the corners of two floor structures facing each other with a gap in the first horizontal direction, they are respectively fixed below the floor surface of each floor structure, and are farthest from the bottom in the first horizontal direction of the bottom. Left and right edge members extending in a second horizontal direction perpendicular to the first horizontal direction,
A movable cover body having one end portion rotatably connected to one edge member around a rotation axis parallel to the second horizontal direction, and the other end portion supported by the other edge member;
Hinge means for connecting the one end of the movable cover body to one edge member so as to be rotatable about the rotation axis;
A plurality of bearing bars interposed between the other end portion of the movable cover body and the wall portion of the other edge member and arranged parallel to each other along the second horizontal direction, and directions in which the bearing bars are separated from each other And an expansion / contraction absorber having an urging member for elastically urging the floor expansion joint device.   2. The guide member having a sliding guide surface for guiding the other end portion of the movable cover body upward as the other end portion of the movable cover body comes close to the stretchable absorber. The expansion joint device for floors as described.   The floor expansion joint device according to claim 1, wherein the other edge member is provided with a retreat space in which each sliding shaft retreats when the expansion / contraction absorber is contracted in the first horizontal direction.   4. The displacement of the first horizontal direction of each of the bearing bars disposed on both sides of the stretchable absorber in the first horizontal direction is restricted by the other edge member. The expansion joint apparatus for floors as described in one.

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