JP2014214570A - Joint cover device for floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint cover device for a floor capable of reducing construction work more than usual.SOLUTION: A variable cover plate 21 formed by juxtaposing a plurality of strip-shaped divided plates 22a and 22b in a width direction of a joint S, is connected to and placed on a building P, on a plurality of expansible support beams 5a and 5b extended between the joints S of the buildings P and Q, and a sliding support member 31 formed by chaining a plurality of sliding beams 32 juxtaposed in the width direction of the joint S by a chain-like string 33 of the predetermined length, is connected to and placed on the building Q and the movable cover plate 21, and since a placing cover plate 41 placed on the sliding support member 31 by immovably holding by the building Q is arranged so that its free end part 41b is placed on the variable cover plate 21, when the buildings P and Q are relatively displaced, the placing cover plate 41 is supported by the respective sliding beams 32 maintained at an interval of the length or less of the chain-like string 33, so that even if a plate thickness of the placing cover plate 41 is thinned, desired load-resistant strength can be provided.

Description

  The present invention relates to a floor joint cover device that covers joints between floors of adjacent buildings.

  In recent years, in order to minimize the damage caused by earthquakes, many buildings have been built that support the lower part with a seismic isolation device having a buffer function. In such a base-isolated structure, a relatively wide joint (clearance) capable of absorbing displacement due to an earthquake is formed between adjacent structures. In such joints, a floor joint cover device that is passed between the joints and forms a passage between the two buildings is disposed (see Patent Document 1).

  The floor joint cover device (expansion joint floor structure) of Patent Document 1 includes a movable plate that spans between both buildings and functions as a movable floor. This movable plate is held by the building so that it can move in the joint width direction (erection direction) and can rotate in the horizontal direction, and is movable when both buildings are relatively displaced in the horizontal direction. The plate is configured to be able to absorb strain by moving and rotating to follow both buildings.

JP 2011-26825 A

  In the floor joint cover device of Patent Document 1 described above, a space for accommodating a movable plate wider than the joint is formed under the floor of one or both buildings. Such a space is set to a sufficient size so that the movable plate can be accommodated without hindrance when the adjacent building is relatively displaced in the direction of approaching. Therefore, a relatively thick steel plate is used for the floor board forming this space so that it can sufficiently withstand the load of a passing person or a cart. However, such a thick steel plate is heavier than a thin steel plate, so that the construction work is difficult and the time and cost required for the construction increase.

  The object of the present invention is to solve such problems, and an object of the present invention is to provide a floor joint cover device that can reduce the construction work more than before.

  The present invention is a floor joint cover device that is passed over joints between floors of adjacent buildings and covers the joints, so that both ends of the floor joints can be horizontally rotated with respect to the buildings on both sides. A plurality of telescopic support beams that are connected to each other and arranged in parallel in the longitudinal direction of the joint, and extendable in the width direction of the joint, and a plurality of strip-like divided plates that extend along the longitudinal direction of the joint Are arranged in parallel in the width direction of the joint, and are connected so that adjacent strip-like divided plates can be slid in the longitudinal direction of the joint. A variable cover plate slidably mounted on the telescopic support beam in a state of being connected to the object side, and a plurality of sliding beams extending along the joint longitudinal direction are aligned in the joint width direction. Slidably mounted on the telescopic support beam, and adjacent sliding beams are formed into a chain string of a predetermined length. A sliding support member having one end connected to the other building side and the other end connected to the variable cover plate, and is formed in a flat plate shape. The other end of the structure is held immovably and the other end is a free end, and the free end is mounted on the variable cover plate, and the sliding between the telescopic support beam A floor joint cover device comprising a mounting cover plate supported by a sliding beam so as to be slidable. Here, it is sufficient that at least the variable cover plate directly covers the joint. Further, the “width direction of the joint” is a direction in which the floors of the two buildings are passed across the joint, and the “longitudinal direction of the joint” means a direction orthogonal to the width direction of the joint.

  In such a configuration, since the mounting cover plate is supported by the plurality of sliding beams arranged in the width direction of the joint between the variable cover plate and the other building, the load applied on the mounting cover plate Can be supported by a plurality of sliding beams. Here, since the plurality of sliding beams are linked by the chain string, the distance between the variable cover plate and the other structure changes when the adjacent structures are relatively displaced in the joint width direction. However, the interval between the adjacent sliding beams does not become wider than the length of the chain string. Therefore, the boarding cover plate can be reinforced by a plurality of sliding beams positioned at intervals equal to or less than the length of the chain string. For this reason, even if the board cover plate is made thinner than the conventional structure, sufficient load resistance strength can be obtained against the load applied on the board cover plate. Therefore, according to the configuration of the present invention, the thickness of the mounting cover plate can be reduced without reducing the load bearing strength described above, and thus the weight of the mounting cover plate is reduced, and the load required for the construction work is reduced. Can be reduced.

  Since the board cover plate thickness can be set according to its size, the number of sliding beams, the length of the chain string, etc., by optimizing these, it is half that of the conventional configuration. It can be made thinner below. And since sufficient load-bearing strength is obtained even if it uses such a thin mounting cover board, the effect of reducing the burden required for the above-mentioned construction work improves dramatically.

  In the above-described floor joint cover device of the present invention, each of the variable cover plates is arranged so as to follow the telescopic support beam that rotates in the horizontal direction when the adjacent building is relatively displaced in the longitudinal direction of the joint. Divided plate guide means for sliding the strip-shaped divided plates in the longitudinal direction of the joints, respectively, and each sliding beam of the sliding support member so as to follow the telescopic support beams rotating in the horizontal direction described above. A configuration including beam guide means for sliding in the longitudinal direction is proposed.

  In such a configuration, when adjacent structures are displaced relative to each other in the longitudinal direction of the joint, each strip of the variable cover plate is divided so as to follow the telescopic support beam that is rotationally displaced along with the relative displacement. The plate slides in the longitudinal direction of the joint, and each sliding beam of the sliding support member slides in the longitudinal direction of the joint. Therefore, even when the relative displacement is caused in the longitudinal direction of the joint, the effect of reinforcing the mounting cover plate by each sliding beam between the variable cover plate and the other building can be stably exhibited. Therefore, the above-described effect of the present invention that a sufficient load bearing strength can be exhibited even when a thin cover board is used is stably exhibited even when the joint is relatively displaced in the longitudinal direction. Can be done.

  In the above-described floor joint cover device of the present invention, the dividing plate guide means is provided below both ends in the longitudinal direction of each strip-shaped dividing plate constituting the variable cover plate, and both ends are horizontal to the structures on both sides. The guide rods having a circular cross section that can be expanded and contracted in the width direction of the joint, respectively connected so as to be rotatable in the direction of the joint, and downward from both ends in the longitudinal direction of each strip-shaped divided plate constituting the variable cover plate A configuration is proposed that includes a guide projection piece having a circular cross section that protrudes into the shape and abuts against the guide rod. Here, the guide protrusions on both sides in the longitudinal direction may be in contact with both the outside and inside of the guide rod.

  In such a configuration, when adjacent structures are relatively displaced in the longitudinal direction of the joint, the guide rod rotates horizontally in the same manner as the telescopic support beam. Thus, each strip-shaped divided plate can be individually slid so as to follow the horizontal rotation. Thereby, each strip-shaped division | segmentation board can be slid stably so that the relative displacement to the longitudinal direction of a joint may be followed.

  In the above-described floor joint cover device of the present invention, the beam guide means protrudes downward from both ends of each sliding beam constituting the sliding support member, and is a cross-section in contact with the telescopic support beam A configuration having a circular guide protrusion is proposed. Here, the guide protrusions on both sides in the longitudinal direction may be in contact with the outside or the inside of the extensible support beam provided on both outsides in the longitudinal direction of the joint.

  In such a configuration, when adjacent buildings are displaced relative to each other in the longitudinal direction of the joint, each sliding beam is rotated in the horizontal direction by the guide projecting piece that is in contact with the horizontally extending telescopic support beam. It can be individually slid to follow. Thereby, each sliding beam can be slid stably so that the relative displacement to the longitudinal direction of a joint may be followed.

  In the present invention, as described above, since the mounting cover plate is supported by the plurality of sliding beams arranged in the width direction of the joint, the sufficient load bearing strength can be obtained even if the mounting cover plate is made thinner than the conventional thickness. Is obtained. Furthermore, since each sliding beam is linked by a chain string, even when adjacent structures are displaced relatively, the distance between the sliding beams is kept at a distance equal to or less than the length of the chain string. The reinforcing effect of the mounting cover plate can be maintained. Therefore, according to the present invention, it is possible to reduce the thickness of the boarding cover plate without reducing the load bearing strength, so the burden required for the construction work can be reduced, and the construction time and cost can be reduced. Can be reduced.

It is a top view which shows the construction state of the joint cover apparatus 1 for floors. It is a side view which shows the construction state of the joint cover apparatus 1 for floors. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG. FIG. 3 is a plan view of the floor joint cover device 1 in which the variable cover plate 21 and the mounting cover plate 41 are omitted. FIG. 3 is a plan view of the floor joint cover device 1 with the mounting cover plate 41 omitted. FIG. 3 is a partial enlarged view of CC in FIG. 2. FIG. 4 is a DD partial enlarged view in FIG. 3. It is explanatory drawing which shows the action | operation of the sliding support member 31 with respect to the relative displacement to the direction where the width | variety of the joint S becomes narrow. It is explanatory drawing which shows the action | operation of the sliding support member 31 with respect to the relative displacement to the direction where the width | variety of the joint S becomes wide from the state of FIG.9 (c). It is explanatory drawing which shows the action | operation of the floor joint cover apparatus 1 in the case of approaching along the width direction of the joint S. FIG. It is explanatory drawing which shows the action | operation of the floor joint cover apparatus 1 in the case of separating along the width direction of the joint S. FIG. It is explanatory drawing which shows the action | operation of the floor joint cover apparatus 1 in the case of carrying out relative displacement along the longitudinal direction of the joint S. FIG. It is explanatory drawing which shows the action | operation of the floor joint cover apparatus 1 in the case of relative displacement to the width direction and longitudinal direction of the joint S. FIG.

An embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 to 4, the floor joint cover device 1 according to the embodiment is disposed in a passage L such as a transit hallway connecting adjacent buildings P and Q. Here, both buildings P and Q are supported by a base isolation device (not shown) having a buffering function, and are adjacent to each other via a joint S. The joint S is provided to absorb the relative displacement in the horizontal direction of the buildings P and Q at the time of the earthquake. And the floor joint cover apparatus 1 is attached to both buildings P and Q so that this joint S may be handed over, and forms the floor of the channel | path L in a joint formation location.

  The receiving frames 11 and 12 are arranged along the longitudinal direction of the joint S on the side edge of the floor R1 of the building P and the side edge of the floor R2 of the building Q. A plurality of telescopic support beams 5a and 5b are passed between the receiving frames 11 and 12 at a predetermined interval in the longitudinal direction of the joint S (see FIG. 5). In this embodiment, five telescopic support beams 5a and 5b are arranged. The telescopic support beams 5a and 5b are formed from an insertion insertion member 6 having a U-shaped cross section that opens upward, and an insertion member 7 having a substantially square annular cross section that is slidably inserted into the insertion reception member 6. The fitting insertion member 6 is connected to the receiving frame 12 of the building Q, and the insertion member 7 is connected to the receiving frame 11 of the building P (see FIGS. 5 and 8). Here, a plurality of columnar engaging protrusions (not shown) are formed on the receiving frames 11 and 12 at positions facing each other, and the engaging protrusions of the receiving frame 11 are connected to the end of the insertion member 7. An engagement hole (not shown) formed in the opening is fitted so as to be rotatable, and an engagement hole (not shown) formed in the end of the fitting insertion member 6 is formed in the engagement protrusion of the receiving frame 12. (Not shown) are rotatably fitted. Thereby, the expansion-contraction support beams 5a and 5b are connected to the buildings P and Q so as to be rotatable in the horizontal direction. Further, the fitting and receiving members 6 of the telescopic support beams 5a and 5b are slidably placed on the plurality of base members 10 installed on the floor R2 of the building Q, and in the placed state. The telescopic support beams 5a and 5b are held in the horizontal direction.

  As shown in FIG. 8, the fitting / inserting member 6 constituting the telescopic support beams 5 a and 5 b is provided with flange portions 6 a and 6 a having upper surfaces along the horizontal direction at the side edges that open upward. . And the upper surface of the collar parts 6a and 6a and the upper surface of the penetration member 7 inserted by the fitting insertion member 6 are provided so that it may become substantially the same height. Furthermore, in the present embodiment, a line (not shown) having a circular cross section extending along the longitudinal direction is disposed on the inner bottom surface of the fitting insertion member 6, An insertion member 7 is mounted. As a result, the fitting / receiving member 6 and the insertion member 7 can be relatively slid relative to each other.

  The plurality of (five) telescopic support beams 5a and 5b passed over the joints S of the buildings P and Q are provided with a plurality of strip-shaped divided plates 22a and 22b as shown in FIGS. A variable cover plate 21 and a sliding support member 31 having a plurality of sliding beams 32 are mounted.

  The variable cover plate 21 includes a plurality of strip-shaped divided plates 22 a and 22 b that extend in the longitudinal direction of the joint S and are arranged in parallel. The base of the variable cover plate 21 is connected to the receiving frame 11 of the building P, and the lower surface thereof is supported by the telescopic support beams 5a and 5b. Each of the strip-shaped divided plates 22a and 22b is configured by a cylindrical metal rod having an isosceles trapezoidal cross section (see FIG. 7), and all the strip-shaped divided plates 22a and 22b are formed in a longitudinal direction and a short length. The dimensions in the hand direction are substantially the same. Each of the strip-shaped divided plates 22a and 22b is arranged in parallel in the width direction of the joint S so that the longitudinal direction thereof coincides with the longitudinal direction of the joint S, so that the overall shape of the variable cover has a substantially flat rectangular shape. A plate 21 is formed. Here, as shown in FIG. 7, each strip-shaped divided plate 22a, 22b is formed with a connecting groove 24 having a C-shaped cross section on one side in the longitudinal direction and on the opposite side (the other side in the longitudinal direction). A connecting protrusion 25 having a circular cross section for fitting the connecting groove 24 is formed. The strip-shaped divided plates 22a and 22b are connected to each other in the width direction of the joint S by fitting the connecting groove 24 and the connecting protrusion 25 slidably with each other. In this connected state, the variable cover plate 21 is formed, and the strip-shaped divided plates 22a and 22b are individually movable in the longitudinal direction of the joint S (see FIGS. 13 and 14).

  One strip-shaped divided plate 22a located closest to the building P in the connected state of the respective strip-shaped divided plates 22a, 22b is connected to the receiving frame 11 of the building P through tightening bolts and nuts (see FIG. Not shown). Thus, the strip-shaped divided plate 22a connected to the receiving frame 11 of the building P constitutes the base end portion of the variable cover plate 21, and the base end portion is connected to the building P side as described above. ing. The strip-shaped divided plates 22a and 22b connected in this manner are placed on the upper surfaces of a plurality of telescopic support beams 5a and 5b that are provided at predetermined intervals in the longitudinal direction of the joint S, and the telescopic support beams It can slide on 5a and 5b.

  In such a variable cover plate 21, a predetermined number of strip-shaped divided plates 22a arranged in parallel on the building P side are panels formed by laminating a decorative sheet on a rubber plate on the upper surface as shown in FIG. Each floor material 26 is affixed. Here, the panel-like flooring 26 affixed to the strip-shaped dividing plate 22a closest to the building Q is provided with an inclined portion 27 that is inclined upward. On the other hand, on the building Q side, a predetermined number of strip-like divided plates 22b to which the panel-like flooring 26 is not attached are arranged in parallel. That is, on the upper surface of the variable cover plate 21, the thickness of the panel-like flooring 26 is larger in the region on the building P side made of the strip-like divided plate 22a than on the region on the building Q side made of the strip-like divided plate 22b. It's only a minute higher. Note that the thickness of the panel-like flooring 26 is substantially equal to the thickness of the riding cover plate 41 as will be described later.

  Furthermore, as shown in FIGS. 2 and 3, guide strips 28 and 28 projecting downward are provided at both ends in the longitudinal direction of each of the strip-shaped divided plates 22a and 22b. As shown in FIGS. 7 and 8, the guide protrusion 28 has a bolt structure with a circular cross section, and is fixed to both ends of each of the strip-like divided plates 22a and 22b so as to protrude substantially vertically downward. The guide protrusions 28 are brought into contact with circular guide rods 16 and 16 respectively disposed below the both ends in the longitudinal direction of the strip-shaped divided plates 22a and 22b. Here, as shown in FIGS. 3 and 5, the guide rods 16 and 16 are provided on the outer sides of the telescopic support beams 5b and 5b that respectively support both ends in the longitudinal direction of the strip-shaped divided plates 22a and 22b. It is arranged along 5b. Each guide rod 16 has both end portions fixed to both end portions of the telescopic support beam 5b and arranged side by side, and can rotate in the horizontal direction together with the telescopic support beam 5b. That is, each guide rod 16 is connected to the receiving frame 11 of the building P and the receiving frame 12 of the building Q so as to be rotatable in the horizontal direction. Further, each guide rod 16 includes a cylindrical fitting tube portion 17 and a cylindrical insertion tube portion 18 fitted in the fitting tube portion 17 (see FIG. 8). It can be expanded and contracted in the width direction. Thereby, the guide rod 16 moves integrally with the telescopic support beam 5b in accordance with the relative displacement of the buildings P and Q. As shown in FIGS. 3 and 8, the guide protrusions 28 and 28 of the strip-like divided plates 22 a and 22 b are in contact with the guide rods 16 and 16, as shown in FIGS. When the buildings P and Q are relatively displaced in the longitudinal direction of the joint S, the guide protrusions 28 of the strip-shaped divided plates 22a and 22b are guided by the guide rods 16 and 16 that horizontally rotate in the same manner as the telescopic support beams 5a and 5b. , 28 are pressed in the longitudinal direction of the joint S. Thereby, each strip-shaped divided plate 22a, 22b moves individually in the longitudinal direction of the joint S so as to follow the horizontal rotation of the telescopic support beams 5a, b. Note that the guide rod 16 and the guide protrusions 28 realize the divided plate guide means according to the present invention.

  On the other hand, the above-mentioned sliding support member 31 is arranged such that a plurality of sliding beams 32 extending in the longitudinal direction of the joint S are arranged in the width direction of the joint S as shown in FIGS. The sliding beam 32 is made of a steel pipe material having a quadrangular cross section, and its length in the longitudinal direction is slightly shorter than the length of the strip-shaped divided plates 22a and 22b, and its height is divided into strips. It is substantially the same as the height dimension of the plate 22b (configuration without the panel-like flooring 26). Each sliding beam 32 is slidably mounted on the plurality of telescopic support beams 5a and 5b. Further, each sliding beam 32 is provided with a chain string 33 having a predetermined length for connecting adjacent ones to both ends in the longitudinal direction thereof, whereby all the sliding beams 32 are chained together. ing. The sliding beam 32 arranged closest to the building P is connected to the variable cover plate 21 by chain strings 33 and 33. That is, the chain cords 33, 33 are formed on both ends of the strip-shaped divided plate 22b located closest to the building Q side of the variable cover plate 21 and both ends of the sliding beam 32 arranged closest to the building P side. Each is attached. Further, a fixed beam 35 made of a steel pipe material having the same size and shape as the sliding beam 32 is connected to the end of the telescopic support beams 5b, 5b on the receiving frame 12 side. That is, the telescopic support beams 5b and 5b that support both ends in the longitudinal direction of the sliding beam 32 are circular engagement holes (not shown) at the end of the flange 6a of the fitting / receiving member 6 on the receiving frame 12 side. Are formed, and engaging protrusions (not shown) having a circular cross section protruding downward from both ends of the fixed beam 35 are rotatably fitted in the respective engagement holes. Then, chain strings 33 are respectively attached to both ends of the fixed beam 35 and both ends of the sliding beam 32 arranged closest to the building Q.

  As shown in FIG. 10, the sliding support member 31 is pulled toward the building P by the variable cover plate 21, so that the sliding support member 31 is pulled by the chain string 33 in order from the sliding beam 32 on the building P side. . At this time, the interval between the sliding beams 32 is not wider than the length of the chain string 33, and the maximum value of the interval is defined by the length of the chain string 33. Here, since the chain strings 33 that connect the adjacent sliding beams 32 are all the same length, the maximum value of the interval between the sliding beams 32 is the same. Further, as shown in FIG. 9, when the variable cover plate 21 moves to the building Q side, the sliding support member 31 moves while being pressed by the variable cover plate 21 sequentially from the sliding beam 32 on the building P side. .

  Further, as shown in FIGS. 3 and 4, each sliding beam 32 is formed with circular guide protrusions 34 and 34 projecting downward in the vertical direction at portions near both ends in the longitudinal direction. The guide protrusions 34 and 34 are provided so as to contact the side portions of the telescopic support beams 5b and 5b that support both ends in the longitudinal direction of the sliding beams 32 (see FIG. 8). That is, the guide protrusions 34, 34 of the sliding beams 32 abut on the side portions of the inner flange portion 6a of the fitting / receiving member 6 constituting the telescopic support beams 5b, 5b. Thereby, when the structures P and Q are relatively displaced in the longitudinal direction of the joint S, the guide protrusions 34 of the sliding beams 32 are pressed in the longitudinal direction of the joint S by the horizontal rotation of the telescopic support beam 5b. Thus, each sliding beam 32 individually moves in the longitudinal direction of the joint S so as to follow the horizontal rotation of the telescopic support beam 5b. The guide projection piece 34 and the telescopic support beam 5b in contact with the guide projection piece 34 constitute beam guide means according to the present invention.

  1 to 4, a mounting cover plate 41 made of a flat steel plate is disposed on the sliding support member 31 described above. The mounting cover plate 41 has one end 41a on the building Q side fastened by a screw to a horizontal support edge 12a provided on the receiving frame 12 of the building Q (see FIGS. 9 and 10). ), The end 41b on the building P side is placed on the strip-shaped divided plate 22b of the variable cover plate 21 described above. Thereby, as for the boarding cover board 41, the one end part 41a is supported by the receiving frame 12 of the building Q so that a movement is impossible, and the other end part 41b is a free end part (41b). Here, since the upper surface of the horizontal support edge 12a of the receiving frame 12 and the upper surface of the strip-shaped divided plate 22b of the variable cover plate 21 are at substantially the same height, the mounting cover plate 41 is arranged along the horizontal direction. It is installed. Further, since each sliding beam 32 constituting the sliding support member 31 has substantially the same height as the strip-shaped divided plate 22b as described above, the riding cover plate 41 is provided with each sliding beam. It is placed on the beam 32. In other words, each sliding beam 32 is slidable between the mounting cover plate 41 and the telescopic support beams 5a and 5b (see FIGS. 9 and 10).

  As shown in FIG. 8, the board cover plate 41 is set to have substantially the same thickness as the panel-like floor material 26 attached to the strip-shaped divided plate 22 a described above. Thereby, in a state where the free end 41b is placed on the strip-shaped divided plate 22b, the upper surface of the riding cover plate 41 and the upper surface of the panel-shaped flooring 26 of the strip-shaped divided plate 22a of the variable cover plate 21 are arranged. , So that the height is substantially the same. A finishing material (not shown) is affixed to the upper surface of the mounting cover plate 41. Further, a thin plate 45 that protrudes outward is attached to the free end portion 41 b of the mounting cover plate 41 over the end edge thereof.

  Further, the free end portion 41b of the riding cover plate 41 is formed with an inclined portion 42 that is inclined downward at the end edge thereof. The inclined portion 42 of the mounting cover plate 41 is provided so as to face the inclined portion 27 of the panel-like floor material 26 provided on the strip-shaped divided plate 22a closest to the building Q. Therefore, when the buildings P and Q are relatively displaced in the approaching direction, the inclined portion 27 provided on the strip-shaped divided plate 22a hits the inclined portion 42 of the mounting cover plate 41, and the mounting cover is caused by its guiding action. The free end 41b of the plate 41 rides on the strip-shaped divided plate 22a. Thus, the variable cover plate 21 can easily enter the lower side of the riding cover plate 41.

  In this case, the length of the joint S in the longitudinal direction is set to be slightly longer than the length of the sliding beam 32, and the length of the joint S in the width direction is the free end. The portion 41b is set to a dimension that allows the portion 41b to be placed on the strip-shaped divided plate 22b, and has a substantially rectangular shape.

  In the floor joint cover device 1 described above, the board cover plate 41 has a plate thickness, the plate area, the number of sliding beams 32 constituting the sliding support member 31, and the sliding beams 32 linked. It can set based on the length etc. of the chain string 34 to do. In other words, since the riding cover plate 41 is reinforced by the sliding beam 32, the distance between the sliding beams 32 (the length of the chain string 34) and the riding cover plate so as to exhibit a desired load bearing strength. A plate thickness of 41 can be set. Since the boarding cover plate 41 is supported by the sliding support member 31, the plate thickness of the boarding cover plate 41 is less than half that of the prior art without lowering the load bearing strength, as will be described later. Is possible.

Next, the operation of the floor joint cover device 1 will be described.
In the normal state, the floor joint cover device 1 is in a position where the receiving frames 11 and 12 arranged in adjacent buildings P and Q face each other as shown in FIG. The telescopic support beams 5a and 5b are in a state along the width direction (direction perpendicular to the longitudinal direction) of the joint S. Then, the free end 41b of the mounting cover plate 41 is mounted on the strip-shaped divided plate 22b of the variable cover plate 21, and the free end 41b and the strip-shaped divided plate 22a closest to the building Q are almost the same. It is located so as to be abutted (see FIG. 8). In this state, the mounting cover plate 41 is placed on the strip-shaped divided plate 22b so as to cover all the strip-shaped divided plates 22b, and the variable cover plate 21 and the receiving frame 12 on the building Q side. Is mounted on the sliding beam 32 (see FIGS. 1 and 2). The boarding cover plate 41 and the variable cover plate 21 cross the floor R1 of the building P and the floor R2 of the building Q, and form a passage L that crosses the joint S with the floors R1 and R2. ing. In such a normal state, as shown in FIG. 9A, the sliding beams 32 are arranged between the variable cover plate 21 and the receiving frame 12 on the building Q side at an interval shorter than the length of the chain string 33. Therefore, the mounting cover plate 41 can be reinforced to exhibit a desired load bearing strength. Here, for example, if the sliding beams 32 are arranged at substantially equal intervals in the width direction of the joint S at the time of construction, the chain string 33 is sufficiently slackened at the intervals, and movement due to an earthquake or the like is not allowed. This interval can be maintained.

  In the normal state, the strip-shaped divided plates 22a and 22b constituting the variable cover plate 21 are such that the guide protrusions 28 and 28 at both ends abut against the guide rods 16 and 16 parallel to the telescopic support beams 5b and 5b. Therefore, as shown in FIG. 11A, the variable cover plates 21 are aligned along the width direction of the joint S, and the variable cover plate 21 has a substantially rectangular shape. Similarly, each slide beam 32 constituting the slide support member 31 has guide protrusions 34, 34 at both ends thereof in contact with the side portions of the telescopic support beams 5b, 5b. Aligned along

  When the buildings P and Q are relatively displaced in an approaching direction due to an earthquake or the like, as shown in FIG. 11 (b), the floor joint cover device 1 is configured such that the telescopic support beams 5a and 5b contract and the variable cover plate. 21 deeply enters the lower side of the mounting cover plate 41, thereby absorbing the distortion accompanying the shrinkage of the joint width. Since the variable cover plate 21 and the receiving frame 12 of the building Q are relatively close to each other, the sliding beam 32 is located on the building P side as shown in FIGS. 9B and 9C. In order, the variable cover plate 21 (the strip-shaped dividing plate 22b closest to the building Q side) is pushed to move to the building Q side. Here, each slide beam 32 is moved while maintaining a substantially parallel state by the guide protrusions 34 and 34 that are in contact with the telescopic support beams 5b and 5b. Are substantially equal in the longitudinal direction of the joint S. In this case, since the interval between the sliding beams 32 pushed by the variable cover plate 21 becomes narrower than usual, the reinforcing effect of the riding cover plate 41 is maintained, and the load bearing strength is not lowered. On the other hand, when the buildings P and Q are relatively displaced in the direction away from each other, the telescopic support beams 5a and 5b are extended and covered with the mounting cover plate 41 of the variable cover plate 21 as shown in FIG. The portion (the strip-shaped divided plate 22b) is exposed to the building P side from under the mounting cover plate 41, and thereby absorbs the distortion accompanying the shrinkage of the joint width. Since the variable cover plate 21 and the receiving frame 12 of the building Q are relatively separated from each other, as shown in FIG. It is pulled by the variable cover plate 21 (the strip-shaped dividing plate 22b closest to the building Q) and moves to the building P side. Here, each sliding beam 32 moves in a substantially parallel state due to the abutment between the guide projecting pieces 34 and 34 and the telescopic support beams 5b and 5b. It is approximately equal in the longitudinal direction. For this reason, the length of the chain string 33 is approximately equal to the length of the sliding beam 32 on the building P side. Also in this case, since the distance between the sliding beams 32 is not wider than the length of the chain string 33, a desired load resistance strength can be maintained.

  Further, when the buildings P and Q are relatively displaced in the longitudinal direction of the joint S due to an earthquake or the like, the receiving frames 11 and 12 of the buildings P and Q are displaced in the longitudinal direction of the joint S as shown in FIG. Thus, each of the telescopic support beams 5a and 5b rotates horizontally with respect to the receiving frames 11 and 12 connected at both ends, and tilts in the horizontal direction with respect to the width direction of the joint S. Along with this, the guide rods 16 and 16 also rotate horizontally integrally with the telescopic support beams 5b and 5b, so that each of the strip-like divided plates 22a and 22b of the variable cover plate 21 has guide protrusions 28 and 28. The guide rods 16, 16 are pressed in the longitudinal direction of the joint S to move individually, and the variable cover plate 21 is deformed into a substantially parallelogram shape. The variable cover plate 21 thus deformed can hold the passage L passing the joint S without a gap. Furthermore, each sliding beam 32 of the sliding support member 31 moves individually with its guide projections 34, 34 being pressed in the longitudinal direction of the joint S by the telescopic support beams 5b, 5b. At this time, each sliding beam 32 is pulled by the variable cover plate 21, but the interval between adjacent ones is kept below the length of the chain string 33, and the receiving frame 12 of the building Q and the variable cover plate 21. The mounting cover plate 41 is supported between the two. Thereby, even when the structures P and Q are relatively displaced in the longitudinal direction of the joint S, the reinforcing effect of the mounting cover plate 41 is maintained, and a desired load bearing strength can be maintained. When the earthquakes and the like are settled and the receiving frames 11 and 12 of the buildings P and Q return to the positions where they face each other, the horizontally-rotated telescopic support beams 5a and 5b and the guide rod 16 extend along the width direction of the joint S. Since returning to the state, each of the strip-shaped divided plates 22a and 22b is pressed by the guide rods 16 and 16 in the opposite direction to the above movement and individually moved, and the variable cover plate 21 is restored to a substantially rectangular shape (FIG. 11 ( a)). Similarly, each sliding beam 32 also returns to a state in which it is aligned in the width direction of the joint S. In this way, the floor joint cover device 1 returns to the normal state before the displacement.

  Furthermore, when the buildings P and Q are relatively displaced in both the width direction and the longitudinal direction of the joint S due to an earthquake or the like, the floor joint cover device 1 is arranged in the width direction as shown in FIG. The operation by displacement and the operation by relative displacement in the longitudinal direction occur simultaneously. Accordingly, as described above, the passage L passing the joint S is held, and the reinforcing effect of the mounting cover plate 41 by the sliding support member 31 is maintained, so that the load resistance strength can be maintained.

  Thus, the floor joint cover device 1 according to the present embodiment can operate smoothly following the relative displacement in the width direction and the longitudinal direction of the joint S of the buildings P and Q. The passage L that passes S can be held. In particular, the distance between the sliding beams 32 that support the mounting cover plate 41 between the receiving frame 12 of the building Q and the variable cover plate 21 is the chain string 33 regardless of the relative displacement of the buildings P and Q. Therefore, the reinforcing effect of the riding cover plate 41 is stably exhibited, and a desired load bearing strength is obtained. That is, according to the floor joint cover device 1, it is possible to appropriately hold the passage L with no gap between the buildings P and Q that can withstand the load.

  Since the floor joint cover device 1 of this embodiment includes the sliding support member 31 that supports the mounting cover plate 41 as described above, the plate thickness of the steel plate used for the mounting cover plate 41. Even if the thickness is less than half that of the conventional structure, sufficient load bearing strength can be obtained. For example, in order to clarify the operational effects of the sliding support member 31, the comparison will be made with a comparative configuration (not shown) in which the sliding support member is removed from the configuration of the present embodiment. In the comparative configuration that does not include the sliding support member, the load applied on the mounting cover plate must be supported only by the mounting cover plate, and thus a thick steel plate must be used. Specifically, in order to exhibit a desired load bearing strength, it is necessary to use a steel plate having a thickness of about 20 mm for the mounting cover plate. On the other hand, in the configuration of the present embodiment, since the riding cover plate 41 is supported by the sliding support member 31, in order to obtain the load resistance strength of the same level, a steel plate having a thickness of about 9 mm is used. good. As described above, according to the configuration of the present embodiment, the board cover plate 41 can be thinned to half or less without reducing the load bearing strength, and the weight of the board cover plate 41 is reduced accordingly. Therefore, the burden required for the construction work can be reduced, and the time and cost required for the construction can be reduced.

  Moreover, since the board thickness of the boarding cover board 41 and the thickness of the panel-like flooring 26 stuck on the strip-shaped division board 22a of the variable cover board 21 are made substantially the same, the boarding board 41 of the boarding board 41 is normally set. The upper surface and the upper surface of the variable cover plate 21 exposed from the riding cover plate 41 have substantially the same height. Thereby, it has the advantage that a trolley | bogie etc. pass easily the said path | route L smoothly.

  The floor joint cover device of the present invention is not limited to the embodiment described above, and various modifications can be made without departing from the gist of the present invention. For example, the floor joint cover device of the present invention is not limited to the one provided in the passageway, but can be applied to all the passages connecting different buildings.

DESCRIPTION OF SYMBOLS 1 Floor joint cover apparatus 5a, 5b Telescopic support beam 16 Guide rod 21 Variable cover board 22a, 22b Strip-shaped division board 28 Guide protrusion 31 Slide support member 32 Slide beam 33 Chain string 34 Guide protrusion 41 Mounted Cover plate 41b Free end P, Q Building S Joint

Claims (4)

A floor joint cover device that is passed over joints between floors of adjacent buildings and covers the joints,
A plurality of telescopic support beams, both ends of which are connected to the structures on both sides so as to be horizontally rotatable, and arranged in parallel at a predetermined interval in the longitudinal direction of the joint, and extendable in the width direction of the joint; ,
A plurality of strip-shaped divided plates extending in the longitudinal direction of the joint are arranged in parallel in the width direction of the joint, and the adjacent strip-shaped divided plates are connected so as to be slidable in the longitudinal direction of the joint. A variable cover plate that is formed in a rectangular shape and is slidably mounted on the telescopic support beam in a state where the base end portion is connected to one building side,
A plurality of sliding beams extending along the longitudinal direction of the joint are slidably mounted on the telescopic support beam so as to be aligned in the width direction of the joint, and adjacent sliding beams are connected to each other by a predetermined length chain. A sliding support member formed by chaining with a string, having one end connected to the other building side and the other end connected to the variable cover plate;
It is formed in a flat plate shape, one end is held immovably with respect to the other building side, and the other end is a free end, and the free end is mounted on the variable cover plate, A floor comprising a mounting cover plate supported by the sliding beam so that the sliding beam of the sliding support member is slidable with the telescopic support beam. Joint cover device. When the adjacent building is displaced relatively in the longitudinal direction of the joint, the strip-like divided plates of the variable cover plate are slid in the longitudinal direction of the joint so as to follow the telescopic support beam that rotates in the horizontal direction. With split plate guide means,
A beam guide means is provided for sliding each sliding beam of the sliding support member in the longitudinal direction of the joint so as to follow the telescopic support beam rotating in the horizontal direction. The floor joint cover device according to 1. The dividing plate guide means
Extending in the width direction of the joints, which are provided below both ends in the longitudinal direction of each strip-shaped split plate constituting the variable cover plate, and both ends are connected to the buildings on both sides so as to be horizontally rotatable. Possible cross-sectional guide rods,
Each of the strip-shaped divided plates constituting the variable cover plate is provided with guide protrusions having a circular cross section that protrude downward from both ends in the longitudinal direction and abut against the guide rods. The floor joint cover device according to claim 2.   The beam guide means includes guide protrusions having a circular cross-section projecting downward from both ends in the longitudinal direction of each sliding beam constituting the sliding support member and coming into contact with the telescopic support beam. The floor joint cover device according to claim 2, wherein the floor joint cover device is provided.

Images