JPH1082101A - Expansion joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an expansion joint which is the optimum for a base isolation structure, has a simple configuration without using a spring, can follow in correspondence to large movement, ensures the operation, and does not cause distortion in a cover plate. SOLUTION: A slide member 2 and an auxiliary slide member 3 are fitted in guide rails 1 fixed to end parts of bodies on both sides of a clearance, respectively, and both end parts of a connection rod 4 arranged between both rails 1 and 1 in such a manner that it goes obliquely are pivoted on the slide member. A central part of an auxiliary rod 5 having substantially half length of the connection rod 4 is pivoted on each central part of both halves of the connection rod 4, and one end part of an auxiliary rod 4 is pivoted on the auxiliary slide member 3. Each end cover plate 7 is arranged along a fixing plate fixed on surfaces of both bodies, and a clearance cover plate 8 provided with an auxiliary guide rail 9 is arranged between the end cover plates 7 in a central part of a rear surface. An auxiliary slide member 10 is fitted in a rail 9 to pivot the other end of the auxiliary rod 5, pivot a central part of the connection rod 4 and a central part of the clearance cover plate 8, pivot a central part of a regulation rod 11 at the same time, and loosely fit both end parts of the regulation rod 11 in a lower side of the end cover plate 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expansion joint for closing a gap in a building. The skeleton referred to in the present invention is not limited to the structural skeleton itself, but is used in a broad sense including various fixing parts on the skeleton side for connecting the expansion joint, such as columns and fixing parts for mounting. Such a configuration is included.

[0002]

2. Description of the Related Art An elastically deformable spring is provided over both fixing members fixed to each end of a frame on both sides of a gap, and the center of the spring is connected to the center of a cover plate having a width extending between the frames. An expansion joint of a configuration is known. On the other hand, as a structure without using a spring, a fixing member having a structure in which rods are combined in a cross-girder shape and made expandable and contractible in a gap width direction (X direction), and both ends of which are fixed to an adjacent frame is used. Each of the cover plates along the end surfaces of both skeletons is rotated in the direction (Z direction) crossing with the skeleton surface by changing the angle by the rotation of the shaft so that it can follow the fluctuation in the longitudinal direction of the gap (Y direction). An expansion joint having a configuration in which a gap cover plate is disposed so that both sides overlap with a predetermined width on both cover plates, and the center of the gap cover plate and the center of the expansion / contraction structure of the reinforcing member are connected to each other is known. (JP-A-57-201446).

[0003]

The structure using the above-mentioned spring has a problem that the range that can follow the frame fluctuation is relatively narrow and cannot cope with a large fluctuation, and the physical strength of the connection is relatively low. Therefore, if the fluctuation is large, the cover plate or the like may be detached. On the other hand, if the hard member is connected with a screw or the like without using a spring, the risk of detachment can be reduced. In this case, it is preferable to adopt a configuration capable of more stably following large fluctuations, a configuration in which the cover plate or the like is not distorted (displaced) due to the fluctuations, and that the configuration itself is simple. Speaking of the latter configuration, a relatively complicated telescopic structure is adopted,
The allowable range of variation in the X direction is limited to the range of a relatively narrow stretchable structure in the form of a girder, and the direction of Y is limited to the range in which the stretchable structure is rotatable by being fixed to a fixed member. Since the plate is connected to the reinforcing member by one shaft, there is a problem that the gap cover plate may rotate and be distorted due to fluctuating friction.

The present invention has been improved in view of the above problems, and has a simple structure capable of absorbing frame fluctuations without using a spring, and has a simple structure. To provide an expansion joint that does not cause unexpected distortion of the cover plate, and applies to gaps such as floors and floors, roofs and roofs, floors and walls, roofs and walls, etc. It is possible to perform the expansion joint function sufficiently even if it is not a seismic isolation structure, and especially to the gap in a seismic isolation structure where a high damping device is installed between the foundation and the upper structure The present invention provides an expansion joint which is more effective when applied to an expansion joint.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to an end cover plate having a cover surface connected to a frame portion on both sides or one side of the gap and having a cover surface along the surface of the frame, and a gap covering the gap. By providing the cover plate and the gap cover plate in such a manner that the width direction ends of the gap cover plate overlap with an appropriate width, in an expansion joint that covers the skeleton gap, the gap length is extended to the skeleton side or the gap cover plate on both sides of the gap. A guide rail of an appropriate length along the direction is fixed to each of the guide rails, and a movable member is attached to both guide rails movably, and a connecting rod having both ends fixed to each movable member so as to be inclined between the frames. The expansion joint is provided by connecting the intermediate portion of the connecting rod and the gap cover plate via a shaft stop state. According to the present invention, in addition to the above configuration, an intermediate portion of the auxiliary rod having an appropriate length is fixed to the connecting rod so that both rods are formed in an X shape, and a movable auxiliary moving member is provided in the guide rail. The auxiliary rod is fixed to one end of the auxiliary rod, and an auxiliary guide rail in the longitudinal direction of the gap is fixed to the intermediate width portion of the back surface of the gap cover plate, and an auxiliary moving member is mounted on the auxiliary guide rail. It is also characterized in that it has a configuration in which the other end of the auxiliary rod is axially fixed. The connecting rod may have one auxiliary rod fixed to the shaft, or two auxiliary rods fixed to both sides of the connecting rod. The connecting rod and the auxiliary rod are both rotatable at least in a direction parallel to the surface of the frame, and the guide rail and the auxiliary guide rail are both movable at least in a direction parallel to the surface of the frame.

Further, in the above construction, the present invention further comprises, in each of the above constructions, a regulating rod having a length extending from the intermediate portion of the gap cover plate to both or one end cover plate at the intermediate portion on the rear surface of the gap cover plate. A configuration may be employed in which both side portions or one side portion of the regulating rod are disposed so as to pass through a receiving portion having a predetermined length formed at a fixed position on the skeleton side. The regulating rod is installed so as to be relatively slidable with respect to the skeleton in the gap width direction together with the gap cover plate, and in the gap longitudinal direction, at least one of the skeleton sides is in a free state, or with respect to both skeleton sides. It is designed to be freely angularly displaceable or slidable.

The moving member mounted on the guide rail is set to be long, and a slide groove is opened on the side surface of the moving member so that the auxiliary rod can slide, and the auxiliary moving member is movably mounted inside the moving member. Configuration. Further, both the moving member and the auxiliary moving member may be configured to be directly movably mounted in the guide rail.

In the expansion joint having the above structure, when the skeletons A and B change in the gap width direction (X direction), the inclined state of the connecting rod is displaced in the gap direction of the skeleton and is fixed to both ends. When the moving member moves along the guide rail to follow, and when the auxiliary rod is fixed to the connecting rod, the crossing angle of the two rods is displaced and at the same time, the moving member is fixed to the moving rod. The auxiliary moving member moves along the guide rail to perform the following operation. Since the gap cover plate is connected to the connecting rod via the shaft stop state, the gap cover plate is not distorted by the fluctuation of the frame. When the auxiliary rod is fixed to the shaft, the gap cover plate is integrated with the auxiliary guide rail on which the auxiliary moving member is movably mounted, so that the gap is always between the two frames without being distorted by fluctuation. It continues to be accurately positioned between the end cover plates on both sides, does not deviate from the center thereof, and there is no risk of detachment.

When the frames A and B fluctuate in the longitudinal direction of the gap (Y direction), at least one of the moving members holding the connecting rod and the guide rail are freely moved (slid) with each other. When the fluctuation is absorbed and the auxiliary rod is fixed to the axis, at least one of the moving members, the auxiliary moving member, the guide rail, and the auxiliary guide rail move freely with each other to absorb the fluctuation, and the gap cover is provided. Since the plate also slides relative to the end cover plate, fluctuations can be absorbed as described above. Any variation on the plane including the X and Y directions can be followed by the above-described combined action, and the variation can be absorbed. Usually, the frame portions on both sides of the gap do not fluctuate in different directions in the Z direction, and even if there is a relatively small fluctuation width, this fluctuation is caused by bending of each cover plate, each rod, each connecting portion, etc. It can be absorbed by the displacement. It is optional to employ an appropriate Z-direction variation tracking configuration such as providing a hinge portion. In the regulation rod, the gap cover plate acts integrally with one of the skeletons or the end cover plate and becomes slidable with respect to the other skeleton or the end cover plate, or both, in the variation of the skeleton in the gap longitudinal direction. Can be uniformly slidable with respect to the skeleton or the end cover plate.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show an example of the expansion joint of the present invention, FIG. 1 is a rear view thereof, FIG. 2 is a sectional view thereof, FIGS. 3 and 4 are exploded perspective views of respective connecting portions, and FIGS. FIG. 3 is a partially enlarged sectional view showing portions 3 and 4 in the same manner as FIG. 2.

Reference numeral 1 denotes a guide rail, which is a C-channel member (cross-sectional angle) fixed along the longitudinal direction of the gap to end portions on the gap sides of horizontal frames A and B (for example, floors) on both sides of the gap S. Shape, L shape, round tube C shape or any other appropriate shape that can function as a guide rail), and the movable member 2 and the auxiliary movable member 3 slidably or rollably mounted in the rail 1 are sufficiently movable. In order to hold these moving members, a C-shaped rear surface is provided on the skeleton side, and an opening 1a is provided toward the inside of the gap S, and an angle portion 1b (a part of the guide rail) is provided. Or may have a shape other than an angle).

The moving member 2 is movably mounted in the guide rail 1 and has a C-channel shape with the opening 2a oriented in the same direction as the guide rail 1 (an appropriate shape as described above). The auxiliary moving member 3 mounted inside has a length that can move sufficiently, and one end of the opening forming surface is a closing surface 2b, and a shaft stopper 2c protrudes horizontally from the closing surface 2b ( The C-shaped opening may protrude from the upper and lower surface portions or the back surface without providing the closing surface.) The shaft stopper 2c is formed so as to protrude from the opening 1a of the guide rail 1 in the mounted state and to move freely in the opening 1a in the longitudinal direction. The auxiliary moving member 3 includes the moving member 2
The movable member 2 has a C-channel-shaped short body facing in the opposite direction to the moving member 2 and has a C-channel-shaped back surface 3.
The shaft stopper 3b is horizontally projected from a. Shaft stopper 3b
Are formed so as to protrude from the openings 1a and 2a in the mounted state and to be freely movable in the longitudinal direction in these openings. Note that the auxiliary moving member 3 has a U-shaped, prismatic, cylindrical,
Alternatively, a rotating body such as a bearing may be used.

Reference numeral 4 denotes a connecting rod, which extends between the guide rails 1 and 1 fixed to the frames A and B, and corresponds to the maximum widening state of the gap S expected due to the fluctuation of the frame similarly to the gap cover plate 8. The length is set to a possible length, and both ends thereof are respectively axle-stopped 4a by a vertical axis on an axle piece 2c of the moving member 2. In addition, the shaft stopper 2c is rotatable at its base (closed surface 2b in the figure), or the tip of the connecting rod 4 including the shaft stopper is rotatable with respect to the connecting rod body. For example, if the connecting rod can be displaced in the horizontal direction, the shaft stopper 4a is not limited to the vertical axis. Also,
A gap cover plate 8 is fixed to the center portion (two division points) of the connecting rod 4 as described below, and the center part (four division points) of the connecting rod 4 is provided with auxiliary rods 5 The central portions are provided with shaft stoppers 4c, 4c, respectively. The auxiliary rod 5 is substantially the same as the connecting rod 4.
/ 2, and is axially fixed to the connecting rod 4 in an X-shape, and one end thereof is rotatably movable in the horizontal direction to the axial stopper piece 3b of the auxiliary moving member 3 in the same manner as described above. The other end is similarly rotatable in the horizontal direction on an auxiliary moving member 10 to be described later, and has a shaft stopper 5b.

On the other hand, fixing plates 6 are provided on the end surfaces of the frames A and B.
Preferably, one end of the fixing plate 6 is installed in the gap S in a slightly protruding state (or in a state not shown but not protruding), and this end is slightly raised in the outer direction of the gap, or The raised edge 6a is formed by, for example, being turned up and then folded back, and the intermediate portion of the folded edge 6a (that is, the position that coincides with the shaft stopper 4b in the gap width direction) can be freely angle-changed by a regulating rod 11 described later. So that
The receiving portion 6b is formed by notching at an appropriate length or by making it into a long hole shape as shown by an imaginary line in FIG. 3, and the lower surface of the end portion is preferably joined to the upper surface of the guide rail 1. Both sides can be integrated by welding so that the guide rail can maintain a stable fixed state. The guide rail 1 and the fixing plate 6 can be formed as an integral member by extruding aluminum or the like. The gap cover plate 8 is slidably overlapped on the folded edge 6a, and the end cover plate 7 is further overlapped thereon.

The end cover plate 7 has substantially the same width as the fixed plate 6,
A plate body having the same length as the gap cover plate 8 faces the fixing plate 6, is disposed so that the gap cover plate 8 is mounted and slidable therebetween, and the end opposite to the gap is fixed to the fixing plate 6. It is stuck to. Reference numeral 8 denotes a gap cover plate, which is a plate of an appropriate length having a width which covers substantially half a position in the gap width direction of the end cover plates 7, 7 disposed on both the frame members A, B. Auxiliary guide rails 9 and 9 in the longitudinal direction of the gap are fixed to the center of the width of the back surface, and these rails 9 and 9 are spaced near the shaft stopper 4b of the regulating rod 11 so that the regulating rod 11 can freely change its angle. The locking projection 8a is formed on the outer edge of the back surface in the gap width direction.
Is formed. The auxiliary guide rail 9 is a C-channel member having an opening toward the back of the gap S, and has an end 5b of the auxiliary rod 5 that is axially fixed to the connecting rod 4 in an X shape. The auxiliary moving member 10 is formed to have a sufficiently movable length, and the auxiliary moving member 10 has a C-shaped or U-shaped cross section (a rectangular body, a cylindrical body, or a rotating body such as a bearing may be used). The other end of the auxiliary rod 5 is provided with a shaft stopper 5b on its back surface.

In the expansion joint, the surfaces of the frames A and B on both sides of the gap S are covered with the end cover plates 7 and 7 and the gap cover plate 8 is provided between the end cover plates 7 and 7. In this case, both sides of the gap cover plate 8 are slidably inserted between the skeletons A and B and the end cover plates 7 and 7, respectively. In addition, the follow-up configuration for the skeleton change is such that the auxiliary rods 5 and 5 are fixed to the connecting rod 4 and
Auxiliary movement in which both ends of the connecting rod 4 are axially fixed to moving members 2 and 2 movably mounted on the guide rails 1 and 1, and outer ends of the auxiliary rods 5 and 5 are movably mounted on the guide rails 1 and 1. The inner end of the auxiliary rod 5 is axially fixed to the auxiliary moving member 10 movably mounted on the auxiliary guide rail 9 on the back surface of the gap cover plate 8, and the center of the connecting rod 4 is fixed to the gap cover. While being fixed to the plate 8 and coaxially to the center of the regulating rod 11, the regulating rod 11 passes through the receiving portion 6 b of the fixed plate 6.

Therefore, for example, from the installation state of FIG. 1 in which the left and right halves of the gap cover plate 8 respectively overlap the end cover plates 7, 7, the frames A and B move away in the X direction and fluctuate. Is enlarged, as shown in FIG.
The connecting rod 4 in the oblique state is displaced so as to approach the orthogonal state with respect to the guide rail 1, and the auxiliary rods 5 and 5 are also displaced in the same manner.
And 10, 10 are moved, and the regulating rod 11 is freely moved to the receiving portion 6b.
Deviate within. The connecting rod 4 and the auxiliary rod 5 can be displaced until the side portions of the shaft stop portions come into contact with each other. Further, when the skeletons A and B approach in the X direction and the gap S is reduced,
As shown in FIG. 8, the connecting rod 4 acts in the opposite direction to FIG.
The auxiliary rod 5 and the auxiliary rod 5 can be displaced by the auxiliary guide rail 9 until they are superimposed substantially on the same line. Furthermore, frame A, B
Move relative to the Y direction and fluctuate, as shown in FIG. 9, the moving members 2, 2,.
The auxiliary moving members 3 and 3 having the auxiliary rod 5 fixed thereto, and two to three of the three parts of the auxiliary moving members 10 and 10, and the guide rails 1 to 9 relatively slide and fluctuate. Absorb. At this time, the regulating rod 11 is also displaced in an oblique direction by being restricted by the receiving portion 6b of the fixed plate 6 integrated with the skeleton.

The fluctuations of the frames A and B actually include a circular motion in which the X and Y directions are compounded. In this case, the fluctuations are the compound fluctuations shown in FIGS. Since the rotation movement of the shaft stop portion and the movement movement of the moving member and the auxiliary moving member can be smoothly followed by the simple structure, and the gap cover plate 8 is held at the three points of the connecting rod 4 and the auxiliary rod 5. , Can be stably positioned between the frames, and the gap S
There is no twist against. Fluctuations in the Z direction (in the depth direction of the gap, usually in the vertical direction of the building) occur when the frame portions on both sides of the gap fluctuate differently from each other, but usually, both side portions of the frame also undergo the same fluctuation at the same time. Therefore, they do not vary greatly from each other. This variation in the Z direction is caused by bending (deformation) due to the length of each cover plate, each rod, and the like.
There is no problem because it is absorbed within an allowable range such as relative displacement of the connection portion.

Although the above-mentioned operation is possible without providing the regulating rod 11, even if the regulating rod 11 which is fixed to the gap cover plate 8 is displaced (rotated) by the provision of the regulating rod, even if the regulating rod 11 is displaced (rotated). The position of the regulating rod is restricted by the receiving portion 6b of the fixing plate 6 fixed to the position of the fixing plate 6, so that the gap cover plate 8 is displaced in one longitudinal direction by receiving different frictional resistances of the respective portions due to the continuous fluctuation. It is possible to prevent that it is not possible to return to the normal state, and to maintain an appropriate covering state.

The connecting structure in which the connecting rod 4 and the auxiliary rod 5 in the expansion joint are fixed to each other in an X-shape is formed only on one back surface of one gap cover plate when the gap cover plate 8 is relatively short. In the case of a long and long one, it can be formed at two or more places, such as near both ends. In any case, the sliding configuration of the guide rail 1 and the auxiliary guide rail 9 can absorb the expansion and contraction of the gap cover plate 8 itself due to a temperature change or the like, and does not impair the covering state.

FIG. 10 shows an embodiment different from the above. The gap cover plate 8 and the end cover plate 7 of the skeleton B are slidable with respect to each other in the Y direction. The plate 7 is an example of an expansion joint when it cannot slide with respect to the gap cover plate 8 in the Y direction due to an installation environment on the side of the skeleton A such that the columns P are adjacent to each other. An end cover plate 7 having the same length as the gap cover plate 8 is provided on the skeleton A side, and an end cover plate 7 having a length long enough to follow the assumed fluctuation in the Y direction is provided on the skeleton B side. I do. The configuration in which the guide rails 1 and 1 are installed on both body sides and the connecting rod 4 fixed to the moving members 2 and 2 is suspended therefrom is the same as in the above-described embodiment. The regulating rod 11 is fixed to the center of the gap cover plate 8 by a shaft stopper 4b, and is disposed so as to extend from the shaft fixing portion to the end of the gap cover plate on the end cover plate 7 side of the frame A, and is inserted therethrough. A receiving part (not shown) is formed at two places,
1 is installed so as to be slidable in the X direction while maintaining a perpendicular state to the gap cover plate 8 and the end cover plate 7 of the frame A. Auxiliary guide rail 9, auxiliary moving members 3, 1
0, no auxiliary rod 5 is provided. Therefore, the gap cover plate 8
At the center of the connecting rod 4 and the regulating rod 11
, And both side portions are overlapped with the end cover plates 7, 7.

According to the above configuration, the fluctuation of the frames A and B in the X direction can be tracked in the same manner as in the above embodiment, and the fluctuation can be absorbed. Further, with respect to the fluctuation in the Y direction, the end cover plate 7 and the gap cover plate 8 on the skeleton A side are regulated so as to be orthogonal to the skeleton A side. Since the end cover plate 7 on the B side is regulated by the connecting rod 4, the movement of the moving member 2 and the guide rail 1 causes the end cover plate 7 to slide relative to the gap cover plate 8 so as to be slidable. It can follow a change in the direction.

FIG. 11 shows an example of still another embodiment. This expansion joint is an example of a roof-shaped expansion joint in which a gap cover plate 8 is provided on end cover plates 7, 7 fixed to the top ends of parapets of the frames A and B, respectively, so as to cover the gap S. It is. Guide rails 1 and 1 are installed at both ends of the body, and moving members 2 and 2 are respectively movably mounted thereon. Both ends of the connecting rod 4 are fixed to the ends 4a. The restricting rod 11 is horizontally connected via a 4b portion, and both ends of the restricting rod 11 are supported by a support member 12 extending over the restricting rod.
Are connected to each other, and the gap cover plate 8 is fitted on the support member 13. Support legs 7a, 7a are erected from the inner ends of the end cover plates 7, 7, respectively.
The right and left intermediate portions of the regulating rod 11 are slidably connected to each other 6c and 6d. The connection 6c is configured such that the connection member 13 is slidably stopped by a bolt and a nut in a long hole provided in the longitudinal direction of the regulating rod 11, and the upper end of the support leg 7a is rotatably connected to the connection member 13. Is formed by combining a guide member 14 which receives the regulating rod 11 slidably, and the upper end of the support leg 7a is rotatably connected to the guide member 14. This operation is the same as that of the common components of the above embodiments.

Although not shown, in the case of an expansion joint connecting a horizontal plane and a vertical plane such as a floor and a wall, a roof and a wall, one end of the gap cover plate and one end cover plate are formed along the vertical plane. The other parts may be configured to be along the vertical plane. The auxiliary rod 5 can fulfill the function of the expansion joint even if it is not provided depending on the installation location. However, if one auxiliary rod 5 is connected to the connecting rod 4, the sliding of the gap cover plate 8 It is performed stably and smoothly without raising, and higher stability can be obtained by connecting two auxiliary rods 5 on both sides of the connecting rod 4. In the above embodiment, the auxiliary moving member 3 is movably mounted in the longer moving member 2 in order to increase the moving width of the moving member. It is also possible to adopt a configuration in which the components 2 and 3 are separately mounted directly on the guide rail 1. In addition, if the regulating rod 11 extends on both sides of the gap cover plate 8 and passes through the receiving portions on both body sides, the relative position between the gap cover plate 8 and the end cover plates 7 on both sides thereof is increased. The sliding can be performed evenly, but it is also possible to dispose only one width of the gap cover plate 8 so as to pass through only the receiving portion on one skeleton side.

[Brief description of the drawings]

FIG. 1 is a rear view of an installation state of an expansion joint according to the present invention as viewed from the back of a gap.

FIG. 2 is a side view showing a state in which the expansion joint of FIG. 1 is installed in a partial cross section.

FIG. 3 is an exploded perspective view showing a configuration of a guide rail, a moving member, an auxiliary moving member, and the like.

FIG. 4 is an exploded perspective view showing a configuration of a gap cover plate, an auxiliary guide rail, an auxiliary moving member, and the like.

FIG. 5 is a partial side view showing the installation state of the components of FIG. 3 in a partial cross section.

FIG. 6 is a partial side view showing the installation state of the components of FIG. 4 in a partial cross section.

FIG. 7 is a front view showing a state where the expansion joint of FIG. 1 has moved away from and moved in the X direction.

8 is a front view showing a state where the expansion joint of FIG. 1 has approached and fluctuated in the X direction.

FIG. 9 is a front view showing a state where the expansion joint of FIG. 1 moves in parallel in the Y direction and fluctuates.

FIG. 10 is a rear view showing an example of another expansion joint according to the present invention and schematically showing an installation state.

FIG. 11 is a side view showing an example of still another expansion joint according to the present invention, and showing an installation state in a partial cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide rail 1a Opening 1b Angle 2 Moving member 2a Opening 2b Closed surface 2c Axle stop piece 3 Auxiliary moving member 3a Back surface 3b Axle stop piece 4 Connecting rod 4a, 4b, 4c Axle stop 5 Auxiliary rod 5a, 5b Axle stop Reference Signs List 6 fixing plate 6a folded edge 6b receiving part 7 end cover plate 8 gap cover plate 8a locking projection 9 auxiliary guide rail 10 auxiliary moving member 11 regulating rod P pillar 6c, 6d connection 7a support leg 12 support member 13 connection member 14 guide Element

Continued on the front page (72) Inventor Yoshiaki Nakamaru 2-12-14 Nagatacho, Chiyoda-ku, Tokyo Inside ABC Corporation

Claims (7)

[Claims] 1. A gap cover plate, which is connected to a frame portion on both sides or one side of the gap and has a cover surface along the surface of the frame, is provided with a gap cover plate for covering the gap so that the width direction ends overlap with an appropriate width. By setting, in the expansion joint to cover the skeleton gap,
Guide rails of an appropriate length along the longitudinal direction of the gap are fixed to the skeleton side or the gap cover plate on both sides of the gap, and moving members are mounted on both guide rails so as to be movable, and both ends are axially fixed to each moving member. An expansion joint having a configuration in which a rod is arranged between a body and a skewed state, and an intermediate portion of a connecting rod and a gap cover plate are connected via a shaft stop state. 2. A gap cover plate, which is connected to a frame portion on both sides or one side of the gap and has a cover surface along the surface of the frame, is provided with a gap cover plate for covering the gap such that the widthwise ends overlap with an appropriate width. By setting, in the expansion joint to cover the skeleton gap,
Guide rails of an appropriate length along the longitudinal direction of the gap are fixed to the skeleton side or the gap cover plate on both sides of the gap, and movable members are mounted on both guide rails so as to be movable, and both ends are axially fixed to each movable member. The rods are arranged in a skewed state between the frames, and an intermediate portion of an auxiliary rod of an appropriate length is fixed to this connecting rod so that both rods become X-shaped. A movable auxiliary moving member is mounted, one end of the auxiliary rod is fixed to this, and an auxiliary guide rail in the longitudinal direction of the gap is fixed to the middle width portion of the back surface of the gap cover plate, and the auxiliary moving member is mounted thereon. An expansion joint having a configuration in which the other end of the auxiliary rod is axially fixed to the auxiliary moving member, and the intermediate portion of the connecting rod and the gap cover plate are connected via an axially locked state. 3. The expansion joint according to claim 2, wherein one auxiliary rod is fixed to the connecting rod. 4. The expansion joint according to claim 2, wherein the two auxiliary rods are fixed to both sides of the connecting rod. 5. A regulating rod having a length extending from an intermediate portion of the gap cover plate to both side or one end cover plates is axially fixed to an intermediate portion on the rear surface of the gap cover plate, and both side portions or one side portion of the regulating rod are provided. The expansion joint according to any one of claims 1 to 4, wherein the expansion joint is arranged so as to pass through a receiving portion of a predetermined length formed at a fixed position on the skeleton side. 6. A moving member mounted on a guide rail is set to be long, a slide groove is opened on a side surface of the moving member so that an auxiliary rod can slide, and an auxiliary moving member is movably mounted inside the moving member. The expansion joint according to any one of claims 2 to 5, having a configuration consisting of: 7. The expansion joint according to claim 2, wherein the moving member and the auxiliary moving member are each mounted directly movably in the guide rail.