JP3307525B2 - Expansion joint device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expansion joint device for closing a gap between structures on a ceiling of a building so as to allow relative displacement of the structures.

[0002]

2. Description of the Related Art FIG. 6 is a vertical sectional view showing a typical prior art expansion joint device 100. As shown in FIG. A holder 104 is disposed between two frame structures 102 and 103 of a building, which is a structure of two ceilings adjacent to each other with a space 101 having a space 11 therebetween. The spring is biased in the approaching direction. A cover plate 105 is attached to the holder 104 at both ends in the longitudinal direction of the holder 104, and the respective frames 102 and 103 are relatively displaced by a sudden earthquake or uneven settlement of the ground. Even if
With the gap 101 closed, the displacement is allowed. For example, a tension coil spring 106 for urging the holder 104 with a spring has one end 107 locked at a fixed position of the holder 104 and the other end 1
08 is attached to one of the skeletons 103, for example.
09 is locked at a fixed position of the one frame 103.

At both ends in the width direction of the cover plate 105, substantially U-shaped bent portions 110a and 110b bent in directions approaching each other are formed, respectively. Engagement piece 1 for fitting into each of the bent portions to prevent floating of each of the bent portions
11a and 111b are fixedly provided, and further, leaf springs 113a and 113b are provided, respectively, which resiliently contact the tip portions 112a and 112b of the bent portions 110a and 110b, respectively. With such a configuration, each of the bent portions 110
a and 110b are locked by the locking pieces 111a and 111b, and the bent portions 110a and 110b are pressed by the leaf springs 113a and 113b in directions away from each other to maintain the locked state. , Cover plate 10
The present inventor has proposed an expansion joint device for mounting 5 on the holder 104.

[0004]

In such a prior art, both ends 107 and 108 of the tension coil spring 106 are provided.
Are locked at fixed positions, respectively, and
Due to the relative displacement between the tension coil springs 2 and 103, the tension coil spring 106 may be greatly expanded. In such a case, when the extension of the greatly extended extension coil spring 106 reaches a limit that allows a tensile force, a large force acts on the cover plate 105 via the holder 104, and the cover plate 105 is deformed. There is a problem that large relative displacement between the frame bodies 102 and 103 cannot be allowed.

The holder 10 of the cover plate 105
4 is performed by locking the locking pieces 111a and 111b fixedly provided as described above, so that the bending portions 110a and 110b are engaged with the locking pieces 111a and 111b. In order to stop it, one bent portion 110a is hooked on one locking piece 111a or 111b, and the cover plate 105 is held by a holder so that the other locking piece 111b or 111a does not interfere with the other bent portion 110b or 110a. In the state displaced with respect to 104, the tip 11 of the other bent portion 110b or 110a
2b or 112a with the other locking piece 111b or 11
1a is brought closer to the skeletons 102 and 103, and the other engaging piece 111b or 111a is fitted into the other bent portion 110b or 110a, and the other bent portion 110b is inserted.
Or 110a with the other locking piece 111b or 111a
Need to be locked. For this reason, since the cover plate 105 is attached to the holder 104, there is a problem that it takes time and work efficiency is low. Therefore, an object of the present invention is to provide an expansion joint device that can allow a large displacement of each structure without deforming the cover plate even if two adjacent structures are largely displaced.

Another object of the present invention is to provide an expansion joint device that can easily attach a cover plate to a holder and can improve the efficiency of the attaching operation.

[0007]

According to the present invention, a plurality of holders extending between adjacent ceiling structures with a gap are provided at intervals in a direction in which the gap extends. A flat cover plate for closing the gap is mounted, and one end of each of the first and second tension springs is movably locked in the left-right direction of the holder, and the other end of the first tension spring is The other end of the second tension spring means is movably connected to a guide rail attached to one of the structures on the gap side and attached to the other structure on the gap side in the extending direction of the gap. The expansion joint device is characterized in that the expansion joint device is locked. According to the present invention, a plurality of holders are provided between two adjacent structures, and the holders are provided with flat cover plates. The holder has
One end of each of the first and second tension spring means is movably locked in the longitudinal direction of the holder. The other end of the first tension spring means is locked to one of the structures at the gap side, and
The other end of the tension spring means is movably locked to a guide rail attached to the other structure on the gap side in the extending direction of the gap. Accordingly, when each structure is relatively displaced due to a sudden earthquake, unequal settlement of the ground, or the like, one end of the first tension spring means is configured to minimize the amount of extension of the first tension spring means. In addition, it can be moved according to the longitudinal direction of the holder. Further, the second tension spring means can move one end along the longitudinal direction of the holder and move the other end along the extension direction so that the amount of extension is minimized. Therefore, when the respective structures are relatively displaced as described above, it is possible to prevent the first and second tension spring means from being greatly extended beyond the elastic limit, and the cover plate is not improperly extended. It is possible to prevent a desired large force from acting. In addition, since the other end of the first tension spring means is locked to one of the skeletons at a fixed position, it has a function of returning the cover plate to a desired position where it was first attached. Therefore, it is possible to prevent the cover plate from being displaced from a desired position where the cover plate is initially attached due to the relative displacement between the respective structures as described above.

[0008] A substantially U-shaped bent portion bent in a direction approaching each other is formed at both ends in the width direction of the cover plate of the present invention, and at least one of both left and right ends of the holder is provided. Is provided with a locking piece which is resiliently fitted into the bent portion of the cover plate. According to the invention, at least one of both ends in the longitudinal direction of the holder has a substantially U-shaped bent portion formed at both ends in the width direction of the cover plate and bent in a direction approaching each other. At least one of them is provided with a locking piece that fits resiliently. Thus, for example, the other end of the cover plate is provided at the other end of the holder in the longitudinal direction while the bent portion formed at one end in the width direction of the cover plate is engaged with the one end of the holder in the longitudinal direction. By pressing the locking piece against the locking piece, the locking piece can be displaced against the elastic force, and the locking piece can be fitted into the bent portion of the cover plate. Therefore, by displacing the locking piece,
The cover plate can be easily mounted on the holder.

[0009]

FIG. 1 is a vertical sectional view showing an expansion joint device 1 according to one embodiment of the present invention. The expansion joint device 1 basically includes a holder 2, a cover plate 3, and a first
And first and second extension coil springs 4 and 5 as second extension spring means.

The space in FIG. 1, which is the extending direction of the space 6 between two ceiling structures 7, 8 constituted by, for example, slabs of a building, adjacent to each other with a space 6 having an interval L2 therebetween. A plurality of the holders 2 are provided at intervals in a vertical direction. This holder 2
It is a long extrusion extending from the two structures 7 and 8, that is, extending in the left-right direction of FIG. 1 and made of an aluminum alloy. The cover plate 3 is attached to such a holder 2 so as to cover from the side opposite to the structures 7 and 8.

The cover plate 3 is made of, for example, an aluminum alloy, and is arranged to extend in a horizontal direction perpendicular to the plane of FIG. Such a cover plate 3 has a flat flat portion 9 extending in a horizontal direction perpendicular to the paper surface of FIG. 1 and a width direction of the flat portion 9, that is, both ends 9a, 9b to each structure 7,
Side walls 10a, 10b bent and connected to the side 8 and folds 11a, 11b parallel to the flat part 9 and connected to the side walls 10a, 10b and bent in a direction approaching each other.
And at both end portions 9a and 9b in the width direction of the flat portion 9,
Each side wall portion 10a, 10b and each folded portion 11a, 11
By b, substantially U-shaped bent parts 12a and 12b are formed at both ends in the width direction of the cover plate 3, respectively.

Each folded portion 11 of the cover plate 3
a, 11b are provided with packings 13a, 13b facing the respective structures 7, 8 and extending in the direction in which the cover plate 3 extends, that is, in the direction perpendicular to the plane of FIG. 13a and 13b are made of, for example, a synthetic resin having resiliency, and the spaces 1 of the structures 7 and 8
4 are resiliently abutted against the surfaces 7a, 8a facing the same. The gap 6 is closed by the cover plate 3, and the gap 6 and the space 14 are hermetically shut off.
It is configured such that air is prevented from entering and exiting between them, so that, for example, hot air, cold air, and moisture do not move between them.

FIG. 2 is a perspective view showing the vicinity of the second tension coil spring 5 when viewed from the inside of the gap 6. Referring to FIGS. 1 and 2, the holder 2 has a flat base portion 15, is formed in a hook shape near the center in the width direction of the base portion 15, and is attached to each of the frames 7 and 8. Thus, a pair of guide pieces 18a, 18b extending in the longitudinal direction of the holder 2, which is the left-right direction of the holder 2, which is the left-right direction of FIG.

The guide piece 18 is provided on the holder 2.
The moving body 19 is held movably in the direction in which the guide pieces 18a, 18b are fitted and fitted in the guide pieces 18a, 18b, that is, in the left-right direction of the holder 2. The moving body 19 is substantially H-shaped, and is fitted and held between the guide rails 18a and 18b. One end 21 of the first tension coil spring 4 is locked to the moving body 19 while being inserted through the locking hole 20 formed in the moving body 19. In this way,
One end 21 of the first tension coil spring 4 is movably locked to the holder 2 in the longitudinal direction thereof.

A substantially L-shaped mounting piece 22 made of, for example, stainless steel is fixed to one of the two structures 7, 8 by, for example, anchor bolts 23. The mounting piece 22 has a spring locking portion 24 formed in the space 6 on the side opposite to the cover plate 3 with respect to the holder 2. The other end 25 of the first extension coil spring 4 is engaged with the spring engagement portion 24, and the other end 25 of the first extension coil spring 4 is attached to one of the structures 7 on the side of the gap 6. 2 is locked on the side opposite to the cover plate 3.

Each of the guide rails 18 is provided on the holder 2.
The moving body 26 having the same configuration as the moving body 19 is held by the a and 18b so as to be movable in the left-right direction of the holder 2. The moving body 26 has the same configuration as the moving body 19, is substantially H-shaped, is fitted between the guide rails 18a and 18b, and is held by the holder 2. One end 28 of the second tension coil spring is locked to the moving body 26 while being inserted into the locking hole 27 formed in the moving body 26. In this manner, one end 28 of the second tension coil spring 5 is connected to each of the guide rails 18a, 18a.
The holder 2 is movably locked in the extending direction, ie, in the left-right direction of the holder 2.

A substantially L-shaped mounting piece 29 made of, for example, stainless steel is attached to the other structure 8 of the two structures 7 and 8, for example, an anchor bolt 30.
Has been fixed by. The mounting piece 29 has a protruding portion 31 in which the holder 2 protrudes toward the one structure 7 on the side opposite to the cover plate 3 in the space 6. A guide rail 32 having a substantially C-shaped cross section and perpendicular to the plane of FIG. 1 and extending in the direction in which the gap 6 extends is fixed to the protrusion 31 by, for example, a screw. I have. This guide rail 32 is
Has a pair of guide portions 33 and 34 which are C-shaped and open on the side facing the. On such a guide rail 32, a moving body 35 having the same configuration as the moving bodies 19 and 26 is held. This moving body 35 is H-shaped as described above,
It is fitted between the guide rails 3 and 34 and is movably held on the guide rail 32. The other end 37 of the second tension coil spring is locked to the moving body 35 while being inserted through the locking hole 36 formed in the moving body 35. In this way, the second
The other end 37 of the extension coil spring 5 is attached to the other structure 8.
On the side opposite to the cover plate 3 with respect to the holder 2 on the gap 6 side, the extending direction of the gap 6 extending the guide rail 32;
That is, it is movably locked in a direction perpendicular to the paper surface of FIG.

By the first and second tension coil springs 4 and 5, the holder 2 is provided with both ends 2a in the longitudinal direction.
2b is spring-biased in a direction approaching each of the structures 7, 8;
The cover plate 3 mounted on the holder 2 is spring-biased in a direction in which both ends in the width direction approach the respective structures 7 and 8 respectively. Thereby, the cover plate 3
Packings 13a, 13 provided at both ends in the width direction of
b resiliently comes into contact with the surfaces 7a, 8a of the respective structures 7, 8, and the gap 6 is closed as described above.

The first and second tension coil springs 4,
One end portions 21 and 28 of the holder 5 are movably locked in the longitudinal direction of the holder 2, that is, in the left-right direction of FIG. 1. Displaced in the left and right direction due to, for example, a sudden earthquake or uneven settlement of the ground, the one end portions 21 and 28 of the first and second extension coil springs 4 and 5 are connected to the first and second extension coil springs 4 and 5. Displacement with respect to the other end portions 25 and 37 of
Since the moving bodies 19 and 26 can move without limit following the displacement, the first and second tension coil springs 4 and 5 are not greatly expanded.

The other end 37 of the second tension coil spring 5
Is locked to a moving body 35 movably provided in a direction in which the gap 6 extends, that is, in a direction perpendicular to the plane of the paper of FIG. Even if the movable body 35 is displaced by a sudden earthquake or uneven settlement of the ground so as to be displaced from each other in the vertical direction, the moving body 35 follows the displacement indefinitely in the same manner as the moving bodies 19 and 26 described above. Therefore, a large displacement does not occur in the second tension coil spring 5. That is, the second tension coil spring 5 is not greatly expanded.

The relative displacement between the structures 7 and 8 due to the sudden earthquake, the uneven settlement of the ground, and the like includes a displacement in a direction approaching and moving away from each other and a displacement in a direction in which the gap 6 extends. And one of the structures 7 or 8 is displaced toward the cover plate 3 with respect to the other structure 8 or 7. According to this embodiment, the displacement in the direction approaching and moving away from each other, and the displacement in the direction in which the gap extends,
According to the above-described configuration, the first and second tension coil springs 4 and 5 can follow without limit,
It is considered that the first and second extension coil springs 4, 5 are extended only by displacement of one of the structures 7 or 8 with respect to the other structure 8 or 7. As a result, the first and second tension coil springs 4 and 5 do not become larger than the limit, and the respective structures 7 and 8 are relatively moved due to the sudden earthquake or uneven settlement of the ground as described above. When the first and second tension coil springs 4 and 5 are displaced to a large extent, no large expansion exceeding the limit occurs, and no large force acts on the cover plate 3. Therefore, the deformation of the cover plate 3 due to the spring force of the first and second tension coil springs 4 and 5 can be prevented by the relative displacement of each of the structures 7 and 8 as described above.

Further, the other end 2 of the first tension coil spring 4
5 is locked to a mounting piece 22 fixed to one of the structures 7, that is, locked to a fixed position, and the cover plate 3 is moved by the displacement of each of the structures 7 and 8 as described above. The cover plate 3 can be held by the spring force of the first tension coil spring 4 so as not to be displaced from a desired position where the first is attached. By configuring the expansion joint device 1 in this manner, the cover plate 3 can be protected against the relative displacement of each of the structures 7, 8 as described above.
The gap 6 can be closed without deteriorating the aesthetic appearance of the design by preventing the occurrence of deformation and displacement.

An engaging piece 40 protruding from one end 2a of the holder 2 in the longitudinal direction is provided at one end 2a of the holder 2 in the longitudinal direction.
Has been fixed. The locking piece 40 has a guide surface 41 that is inclined in a direction approaching one of the structures 7 as the distance from the holder 2 increases. The locking piece 40 fits into a bent portion 12 a formed at one end in the width direction of the cover plate 3, and one end in the width direction of the cover plate 3 is locked to the holder 2. Thereby, the cover plate 3 is held in a state in which the packing 13a is elastically brought into contact with the surface 7a of the structure 7 so that one end in the width direction of the cover plate 3 does not separate from the one structure 7. It can be mounted on the holder 2.

A locking means is provided at the other end 2b in the longitudinal direction of the holder 2 with a locking piece 42 which resiliently fits into the bent portion 12b formed at the other end in the width direction of the cover plate 3. 43 are provided. As shown in FIG. 3, the locking means 43 basically includes the locking piece 42, the fixing piece 44, the connecting piece 45, and a pair of compression coil springs 46a and 46b.

The locking piece 42 has a substantially flat flat portion 47.
And side walls 48a and 48b that bend from both ends in the width direction of the flat portion 47 to the same side in the thickness direction of the flat portion 47,
It is formed in a groove shape whose cross section perpendicular to the longitudinal direction is substantially U-shaped. As the locking piece 42 moves away from the flat portion 47 at one longitudinal end thereof, the locking piece 4
A guide surface 49 that is inclined from one longitudinal end to the other end is formed. The flat portion 47 has a protruding inverted U-shaped projection 50 formed at a position near one end in the longitudinal direction, on the side opposite to the side where the side wall portions 48a and 48b are bent. Fitting holes 51a, 51b extending from the side walls 48a, 48b toward the flat portion 47 are formed in the side walls 48a, 48b at positions near the other end in the longitudinal direction. Further, each side wall portion 48a, 48
Protrusions 52a and 52b protruding in a direction away from the flat portion 47 are formed at one longitudinal end of b. Such a locking piece 42 is made of, for example, stainless steel, and can be formed by cutting and pressing a stainless steel plate. Therefore, the manufacturing is easy, and the locking piece 42 is realized at low manufacturing cost. can do.

The fixing piece 44 has a substantially U-shaped groove shape in cross section perpendicular to the longitudinal direction. The fixing piece 44 has a substantially flat flat portion 53 and a flat portion 53 extending from both ends in the width direction to the thickness direction. It has side wall portions 54a and 54b bent to the same side. In the flat portion 53, through holes 55 penetrating in the thickness direction are formed near both ends in the longitudinal direction. In one of the two side walls 54a and 54b, a cut 56a, which cuts the side wall 54a, extends from the end of the flat part 53 from the side wall 54 to the tip of the side wall 54a.
56b are formed near both ends in the longitudinal direction. Since such a fixing piece 44 is made of, for example, stainless steel and can be formed by cutting and pressing a stainless steel plate, the manufacturing is easy, and the fixing piece 44 can be realized at a low manufacturing cost. Can be.

The connecting piece 45 includes two linear portions 57a and 57b arranged in parallel with each other, and each of the linear portions 57a and 57b.
7b, and has a connecting portion 58 for connecting the respective one ends in the longitudinal direction thereof to each other, and is formed substantially in a U-shape. Each straight part 57
Projections 59a, 59b projecting in directions away from each other are formed at the other ends in the longitudinal direction of a, 57b.
Such a connecting piece 45 is made of, for example, stainless steel, and can be formed by cutting and bending a stainless steel plate. Therefore, the manufacturing is easy, and the connecting piece 45 is realized at a low manufacturing cost. be able to. Further, the pair of compression coil springs 46a and 46b can be realized by commercially available compression coil springs, and can be purchased at low cost.

Each member 4 thus formed is
The locking means 43 is constituted by assembling the components 2, 44, 45, 46a, 46b. That is, first, the tips of the projecting portions 59a, 59b of the connecting piece 58 are fitted into the fitting holes 51a, 51b formed in the locking piece 42, respectively, and the locking piece 42 and the connecting piece 45 are connected. next,
Cut portions 56a, 56b formed in the fixed piece 44 near the longitudinal ends of the straight portions 47a, 47b of the connecting piece 45.
And the connecting portion 58 of the connecting piece 45 is connected to the two cuts 56a and 56b of the one side wall 54a of the fixing piece 44.
The connecting piece 45 and the fixing piece 44 are connected in a state where the connecting piece 45 is locked to the portion 60 sandwiched between the connecting pieces 45. In this manner, in a state where the locking piece 42 and the fixing piece 44 are connected by the connecting piece 45, the protrusions 59 a and 59 b of the connecting piece 45 and the cuts 56 a and 56 b of the side wall 54 a of the fixing piece 44 are formed. The compression coil springs 46a and 46b are respectively disposed between the longitudinal end portions 61a and 61b. In this way, the locked state of the connecting portion 58 of the connecting piece 45 and the portion 60 of the fixing piece 44 sandwiched between the cuts 56a, 56b is maintained by the spring force of the pair of compression coil springs 46a, 46b, Each member 42, 44, 45, 46a, 46b
The locking means 43 is assembled in a state where the locking means 43 is prevented from separating from each other. In this state, the locking piece 42 moves the compression coil spring 46a,
46b, the compression coil spring 4
It can be displaced in the direction approaching the fixing piece 44 against the spring force of 6a, 46b.

Each of the members 42, 4 having such a configuration
4, 45, 46a, and 46b, and the assembling means 43, which is constructed and assembled, connects the flat portion 47 of the locking piece 42 and the flat portion 53 of the fixing piece 44 to the opposite side of the flat portion 15 of the holder. And the insertion groove 62 defined by the flat portion 15 and the previous guide rails 18a and 18b.
From the fixing piece 44 side. At the other end in the longitudinal direction of the holder 2, screw holes 63a, 63b are formed in the bent portions 17a, 17b of the guide rails 18a, 18b, and are formed in the screw holes 63a, 63b and the fixing piece 44. The screw hole 63 is aligned with the through hole 55
a, 63b from the side opposite to the fixing piece 44 with screws 64a, 6b.
4b is screwed on, and screws 64a and 64b are protruded from the opposite sides of the bent portions 17a and 17b in the thickness direction. Thus, the locking means 43 is fixed to the other end of the holder 2 in the longitudinal direction.

By providing such a locking means 43, the holder 2 can be displaced in the longitudinal direction other end 2b of the holder 2 in the longitudinal direction of the holder 2 and partially project from the other end in the longitudinal direction. A locking piece 42 that is resiliently biased in a direction away from 2 can be provided. At this time,
The guide surface 49 formed on the locking piece 42 is arranged to be inclined in a direction approaching the other structure 8 as the distance from the holder 2 increases. The locking piece 4 of the locking means 43
2, the protrusions 52a, 52b are formed. When the locking means 43 is inserted into the insertion groove 62 and fixed, the protrusions 52a, 52b are locked to the base 15 of the holder 2. Therefore, it is possible to prevent the locking means 43 from undesirably entering the inside of the insertion groove 62, and to easily attach the locking means 43 to the holder 2.

By providing such locking means 43 at the other end 2b in the longitudinal direction of the holder 2, the cover plate 3 can be mounted on the holder 2 in the following procedure. First, the bent portion 12a at one end in the width direction of the cover plate 3 is
Locking piece 40 fixed to one end 2a in the longitudinal direction of holder 2
, That is, the locking piece 40 is fitted into the bent portion 12a. Next, in this state, the locking piece 42 of the locking means 43 is provided in the bending portion 12b at the other end in the width direction of the cover plate 3.
Is displaced in a direction approaching the holder 2 against the spring force of the compression coil springs 46a, 46b, and the locking piece 42 is arranged in a state where the cover plate 3 is arranged at a position where the locking piece 42 faces the bent portion 12b. Can be resiliently fitted into the bent portion 12b by the spring force of the compression coil springs 46a and 46b.

More specifically, first, the locking piece 40 fixed to one end 2a in the longitudinal direction of the holder 2 is fitted into the bent portion 12a at one end in the width direction of the cover plate 3, and One end of the holder 3 in the width direction is engaged with a locking piece 40 provided at one end 2a of the holder 2 in the longitudinal direction. Here, the distal end of the folded portion 11b of the bent portion 12b at the other end in the width direction of the cover plate 3 is a structure of the guide surface 49 of the locking piece 42 in the longitudinal direction of the holder 2, that is, in the left-right direction of FIG. It is configured so as to be disposed between the end closer to 8 and the end opposite to the structure 8. In this state, the other end in the width direction of the cover plate 3 is connected to the structure 8 with the front end of the folded portion 11b abutting on the guide surface 49.
Press toward. By pressing, the folded portion 1
1b is pressed toward the locking piece 42, and the guide surface 4
9, the locking piece 42 is displaced in the direction approaching the holder 2 against the compression coil springs 46a and 46b by the pressing force. When the tip of the folded portion 11b is displaced closer to the structure 8 than the locking piece 42, the tip of the folded portion 11b is disengaged from the guide surface 49, and the locking piece 42 is compressed by the compression coil springs 46a and 46b. It is urged in a direction away from the holder 2 by a force to be displaced.

In this way, the bent portion 12a at one end of the cover plate 3 is locked to the locking piece 40 fixed to the one end 2a in the longitudinal direction of the holder 2 and the other width direction of the cover plate 3 is By pressing the end toward the structure 8, the cover plate 3 can be easily attached to the holder 2. Therefore, the cover plate 3 can be easily mounted on the holder 2, and the cover plate 3 can be mounted on the holder by a small number of persons, for example, one person, thereby improving the working efficiency.

In the above description, the cover plate 3 is attached to the holder 2 by connecting the bent portion 12a at one end in the width direction of the cover plate 3 to the locking piece 40 fixed to the one end 2a of the holder 2 in the longitudinal direction. After locking, cover plate 3
Is described by pressing the other end of the holder 2 toward the structure 8, but the locking piece 40 fixed to the one end 2 a of the holder 2 in the longitudinal direction as described above has the guide surface. 41, the width of the cover plate 3 in a state where the bent portion 12 b at the other end in the longitudinal direction of the cover plate 3 is engaged with the engaging piece 42 provided at the other end 2 b in the longitudinal direction of the holder 2. Even if one end in the direction is pressed toward the structure 7, the cover plate 3 can be easily attached to the holder as described above.

The locking piece 42 of this embodiment has the above-described cross-sectional shape, and has high strength against shearing and bending in the thickness direction of the flat portion 47. Since the locking pieces 42 are provided on the holder 2, they are provided at intervals in the extending direction of the gap. For this reason, for example, when a pressure difference is generated between the gap 6 and the space 14 and a force acts on the cover plate 3 in a direction from the gap 6 toward the space 14 due to the pressure difference, the extension direction of the gap 6 is constant. Cover plate 3 having a length equal to the length of the holder 2
Is applied to the locking piece 42. Therefore, a large force acts on the locking piece 42 and may be damaged or deformed. However, according to this embodiment, the locking piece has a high strength against shearing and bending as described above, so that the cover plate 3 is stable to the holder 2 without being damaged or deformed even when the large force acts. It is attached.

Further, as described above, the locking piece 42 is
Are formed, and the locking piece 42 has a similar protrusion 65.
Is formed, and when the bent portion 12a or 12b of the cover plate 3 is locked to the locking piece 40 or 42,
The bent portions 12a and 12b are configured such that the tips of the folded portions 11a and 11b abut on the projections 50 and 65,
Since the cover plate 3 can be angularly displaced with the ends of the folded portions 11a and 11b as fulcrums, an undesired force acts on the bent portions 12a and 12b of the cover plate 3 when the cover plate 3 is attached to the holder 2. In addition, it is possible to prevent the cover plate 3 from being deformed. Thus, the cover plate 3 attached to the holder 2
Are fixed to the holder 2 by screws 66a and 66b so that the cover plate 3 is not undesirably displaced.

In the embodiment of the present invention shown in FIGS. 1 and 4, the locking means 43 is configured to be provided only at the other end 2b in the longitudinal direction of the holder 2.
As another embodiment of the present invention, a lock provided with a locking piece 42 which is resiliently fitted into the bent portion 12a of the cover plate 3 instead of the locking piece 40 at one longitudinal end 2a of the holder 2. The means 43 may be provided similarly to the other end 2b in the longitudinal direction of the holder 2. Even with such a configuration, the work of attaching the cover plate 3 to the holder 2 is similarly easy, and the workability is similarly improved.

FIG. 5 is a vertical sectional view showing an expansion joint device 70 according to still another embodiment of the present invention. The expansion joint device 70 includes a gap 71 between two adjacent ceiling plates 72 and 73 that are spaced apart from each other by a gap 71 having an interval L3.
It is configured to block. Structure 7 that is a ceiling plate
Numerals 2 and 73 are made of, for example, wood, and are attached to, for example, hook-shaped mounting bodies 7 on frame bodies 74a and 74b which are slabs of a building or the like.
5a, 75b, ridges 76a, 76b which are channel steel,
And it is attached by the bezel 77a, 77b which is a channel steel. A plurality of holders 2 are provided at intervals in the extending direction of the gap 71, that is, in the direction perpendicular to the paper surface of FIG.
The holder 2 includes a cover plate 3 having structures 72 and 7.
3 is installed from the opposite side. Parts having a configuration similar to that of the embodiment of the present invention shown in FIGS. 1 and 4, such as a holder 2, a cover plate 3, a locking piece 40 for mounting the cover plate 3 on the holder 2, and locking means 43. Are denoted by the same reference numerals, and description thereof is omitted.

A moving body 78 having substantially the same configuration as the moving body 19 of the embodiment shown in FIGS.
Are held movably in the longitudinal direction of the holder 2, that is, the left-right direction of the holder 2, and one end 80 of a first tension coil spring 79 is locked to the moving body 78. The first tension coil spring 79 is a tension coil spring having a smaller spring constant than the first tension coil spring 4 of the embodiment shown in FIGS. 1 to 4.
The diameter is smaller than 2. By screwing a screw 84 having an insertion hole 83 formed in the moving body 78 into one end 80 of the first tension coil spring 79, the one end 80 of the tension coil spring 79 is fixed to the moving body 78. Are locked so as to be movable in the longitudinal direction of the holder 2.
One of the two structures 72, 73 has a mounting piece 86 which is substantially L-shaped and has a locking portion 85 on the side opposite to the cover plate 3 with respect to the holder 2. Is fixed by, for example, a screw bolt 87. The other end 81 of the first tension coil spring 79 has one structure by screwing a screw 88 inserted into a locking portion 85 formed on the opposite side of the holder 2 of the mounting piece 86 from the cover plate 3. The cover plate 3 is locked to the body 72 on the opposite side with respect to the holder 2.

Further, a moving body 89 having the same structure as the moving body 78 is held in the holder 2 so as to be movable in the left-right direction of the holder 2, and an insertion hole formed in the moving body 89 is formed in the moving body 89. One end 93 of the second tension coil spring 92 is locked by inserting the screw 90 and screwing the screw 91. The other structure 73 has a mounting piece 97 made of, for example, stainless steel and having a substantially L-shape and having a projection 96 on the side opposite to the cover plate 3 with respect to the holder 2. 98. A guide rail 32 having a configuration similar to that of the guide rail 32 shown in FIGS. 1 to 4 is fixed to the protrusion 96 by, for example, a screw. A moving body 99 having substantially the same configuration as the moving body 35 shown in FIGS. 1 to 4 moves in the guide rail 32 in the longitudinal direction of the guide rail 32, that is, in a direction perpendicular to the plane of FIG. The other end 94 of the second tension coil spring 92 is locked to the moving body 99 by a screw 101 which is freely held and inserted through an insertion hole 100 formed in the moving body 99. As a result, the other end 94 of the second tension coil spring 92 is movably locked to the other structure 73 on the side opposite to the cover plate 3 with respect to the holder 2 so as to be movable in the extending direction of the cover plate 3. .

The expansion joint device 70 thus configured
Can obtain the same effect as the expansion joint device 1 of the embodiment shown in FIGS. Further, when the mounting strength of the first and second tension coil springs 79, 92 cannot be expected, that is, the structures 72, 73 are made of wood, and the mounting pieces 86 for the structures 72, 73 made of wood are used. , 97 are fixed by screw bolts 87, 98, and when the mounting strength of the mounting pieces 86, 97 cannot be expected, as in this embodiment of the present invention shown in FIG. Very small tension coil spring 7
9 and 92, the cover plate 3 is urged in a direction in which both ends in the width direction approach the structures 72 and 73, and the expansion joint device 70 is damaged or detaches from the structures 72 and 73. The expansion joint device 70 can be provided without this.

[0042]

As described above, according to the present invention, one end of each of the first and second tension spring means is locked to the holder on which the cover plate is mounted so as to be movable in the longitudinal direction of the holder. The other end of the first tension spring means is locked to one structure on the gap side, and the other end of the second tension spring means is attached to the other structure in the gap direction on the gap side. The guide rail is movably locked to the guide rail. This prevents the first and second tension spring means from being greatly displaced beyond the limit when each structure is relatively largely displaced due to, for example, a sudden earthquake or uneven settlement of the ground. Can be. Therefore, the first and second
Since a large force can be prevented from acting on the cover plate by the tension spring means, the gap is closed by allowing a relatively large displacement of each frame while preventing the cover plate from being deformed. be able to.

Further, according to the present invention, the locking pieces provided on at least one of the both ends in the longitudinal direction of the holder are connected to the substantially U-shaped bent portions formed on both ends in the width direction of the cover plate. It fits elastically. Thus, the locking piece can be fitted into the bent portion of the cover plate by displacing the locking piece against its elastic force. Therefore, when the cover plate is mounted on the holder, the locking piece can be easily mounted simply by displacing the locking piece against the elastic force, so that the mounting operation is easy, and a small number of persons, for example, one person, A cover plate can be attached, and work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention and an expansion joint device 1. FIG.

FIG. 2 is a perspective view showing the vicinity of a second tension coil spring 5 from inside a gap 6;

FIG. 3 is an exploded perspective view showing the locking means 43.

FIG. 4 is an exploded perspective view for explaining an attachment state of the locking means 43 to the holder 2.

FIG. 5 is a vertical sectional view showing an expansion joint device 70 according to another embodiment of the present invention.

FIG. 6 is a vertical sectional view showing a conventional expansion joint device 100.

[Explanation of symbols]

 1,70 Expansion joint device 2 Holder 3 Cover plate 4,79 First tension coil spring 5,92 Second tension coil spring 6,71 Air gap 7,8; 72,73 Structure 12a, 12b Bent portion 18a, 18b Guide piece 19, 26, 35; 78, 89, 99 Moving body 32 Guide rail 40 Locking piece 43 Locking means 44 Fixing piece 45 Connecting piece 46a, 46b Compression coil spring 49 Guide surface

Claims (2)

(57) [Claims] 1. A plurality of holders extending between adjacent ceiling structures with a gap provided at intervals in an extending direction of the gap, and each holder has a flat cover plate for closing the gap. While being mounted, one end of each of the first and second tension spring means is movably locked in the left-right direction of the holder, and the other end of the first tension spring means is connected to one of the structures by the gap. The other end of the second tension spring means is attached to a guide rail attached to the other structure on the gap side in the direction in which the gap extends.
An expansion joint device which is movably locked. 2. A substantially U-shaped bent portion bent in a direction approaching each other is formed at both ends in the width direction of the cover plate, and at least one of both right and left ends of the holder is provided at at least one of the left and right ends. 2. The expansion joint device according to claim 1, wherein a locking piece is provided for elastically fitting into the bent portion of the cover plate.