JPH045108B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an expansion joint for covering gaps between building frames, such as ceiling-to-ceiling, ceiling-to-wall, and wall-to-wall.

(Prior Art) Conventionally, when covering a gap between a building frame, for example, between a ceiling and a ceiling, or between a ceiling and a wall, a cover member has been fixed directly to the ceiling or wall.

(Problems to be Solved) Therefore, when the building frame undergoes relative movement such as expansion and contraction, damage may occur, and the installation of the cover member requires an extremely large amount of effort.

(Means for Solving the Problems) The present invention has been made to solve the above-mentioned conventional problems, and its first purpose is to cope with relative fluctuations in the protruding frame of a building, for example, between ceiling parts. The purpose is to provide an expansion joint that can easily cover the space between protruding frames of a building.
A spring member is disposed in a straddling manner and elastically displaceable along the inner longitudinal direction of the interspace, and a long cover member is disposed along the outer longitudinal direction of the interspace of the protruding frame. A connecting means is interposed between the spring member and the cover member, and an end portion of the spring member is disposed movably inside the protruding body, and the intervening portion is covered with the cover member. The second purpose is to be able to cope with relative fluctuations between the ceiling and wall of a protruding frame that make up the corner of a building, and to facilitate the transition between them. The purpose of the expansion joint is to provide an expansion joint that can be installed under the wall in the space between the protruding frame and the wall frame that constitute the entrance corner of the building frame. A support member is attached along the longitudinal direction of the above-mentioned space, and the support member is attached along the longitudinal direction of the
A spring member is arranged along the inner longitudinal direction of the spacer part so as to span over the other protruding body and the support member, and is elastically displaceable; A long cover member that engages with the support member and has its other end slidably abutted against the other protruding body is disposed, and a connecting means is interposed between the spring member and the cover member, and The end portion of the spring member is located in an expansion joint configured to be displaceably disposed inside the protruding body and cover the intermediate portion and the support member with a cover member.

(First Embodiment) Next, the first embodiment of the present invention will be described in FIGS. 1 and 2.
To explain according to the figure, reference numeral 1 in the figure is a ceiling part (also called a protruding frame) installed adjacent to the building, and the gap T between both ceiling parts 1 has the same gap part. Expansion joint 2 to be covered
(hereinafter simply referred to as joint) is attached.

Reference numeral 2 denotes the above-mentioned joint, and this joint 2 is composed of a spring member 3, a cover member 9, and a connecting member 14.

3 is the above-mentioned spring member, and this spring member 3 is arranged in a straddling manner at a predetermined interval along the longitudinal direction of the space T on the inside (back side) of the ceiling part 1, It is made by bending and forming spring steel or stainless spring steel, etc., and its shape is such that a horizontal receiving part 4 is provided in the center, and on both sides of this receiving part 4, legs are provided diagonally at a predetermined angle α. Legs 5, 5 are provided, and the ends of the leg pieces 5 are bent upward in a curved manner to form arcuate ends 6, respectively. Further, a reinforcing plate 7 is fixed to the upper surface of the receiving part 4, and
A hole 8 through which a connecting member is inserted is provided approximately at the center thereof.

Reference numeral 9 is the above-mentioned cover member, which is made by extrusion molding of a light alloy material such as aluminum or a metal material such as stainless steel. The width dimension is formed to be able to shield the space T between the ceiling parts 1 and cope with the relative movement of the ceiling parts 1, and the width dimension is formed to be able to cover the space T between the ceiling parts 1 and to cope with the relative movement of the ceiling part 1. A dovetail groove 11 is formed into which a presser member 19 made of resin, synthetic rubber, etc. is fitted. Further, two protrusions 12 are provided on the lower surface side of the central portion of the web 10 in the drawing, and connecting members 14 are provided at predetermined intervals in the longitudinal direction between the protrusions 12.
A mounting hole 13 is provided therethrough. In addition,
The convex portion 12 may be provided only on both sides of the attachment hole 13, or may have a circular shape such that the head 16 is accommodated in the outer periphery of the attachment hole 13.

Reference numeral 14 represents the above-mentioned connecting member, and in this example, it is illustrated as a bolt 15 and a nut 18 having a predetermined length. A head 1 is attached to one end of the shaft of this bolt 15.
6 is formed, and a full thread 17 is screwed into the shaft portion.

The bolt 15 is inserted into the mounting hole 13 of the cover member 9 formed in this way, and
The cover member 9 is in contact with the outer surface (lower surface in the figure) of the ceiling portion 1 in a straddling manner, and the bolt 15 is inserted into the gap T, and the spring member 3 is inserted into the hole 8 of the bolt 15.
The nut 18 is further screwed into the nut 18. When the nut 18 is screwed on, the leg pieces 5 of the spring member 3 are elastically deformed into an expanded shape from the state shown by the two-dot chain line in the figure, and the cover member 9 is moved between T is installed in a shielding manner.

In addition, 20 is a ceiling structure material in which a field edge 20a made of steel is attached to a ceiling channel material.

Next, the operation and effect of the first embodiment configured as described above will be explained.

Now, in the joint 2 of this example, a spring member 3 is disposed in a straddling manner and elastically displaceable along the inner longitudinal direction of the space T between adjacent ceiling parts 1, and the spring member 3 is disposed on the outside of the space T between adjacent ceiling parts 1. A long cover member 9 is disposed in the longitudinal direction, and a bolt 15 serving as a connecting means is interposed between the spring member 3 and the cover member 9 to cover the gap T. Therefore, the joint 2 is attached to the ceiling part 1 in a sandwiched manner between the cover member 9 and the ceiling part 1 by the elastic restoring force of the spring member 3, so that, for example, as shown in FIG. It is possible to deal with slight fluctuations in the direction of the arrow, and for example,
Even if there is a field edge 20a or the like close to the space T, the cover member 9 can be mounted with a constant holding force by adjusting the tightening of the nut 18, and the thickness dimension of the ceiling part 1 can be fixed. Even if the dimensions are different, it can be easily installed and the adjustment dimension can be increased. Further, since the cover member 9 is attached without using screws, it has many advantages such as being able to be attached to the ceiling portion 1 made of a board or the like.

In the above embodiment, the nut 18 is screwed forward, but the bolt 15 may also be rotated.In this case, the reinforcing plate 7 of the spring member 3 may be provided with a rotation stopper, or the nut 18 may be welded to the spring member 3, etc. It may also be configured to be fixed by.

(Second Embodiment) Next, FIGS. 3 and 4 show a second embodiment of the present invention.
In Embodiment 0, the connecting member and the cover member are different from those in the first embodiment, and the cross-sectional shape of the cover member 21 is such that presser members 19 are fitted on both sides of the web 22 having a predetermined width along its longitudinal direction. A dovetail groove 23 is formed, and an engaging edge 2 having a plurality of locking protrusions 25 on the inner surface is formed near the dovetail groove 23.
4 are arranged in parallel along the longitudinal direction. Further, this connecting member 26 includes a bolt 27 and a nut 28.
and a locking member 29, which is disposed on the lower surface (also referred to as the outside) of the ceiling portion 1 in correspondence with the spring member 3 and is connected to the cover member 21.
This locking member 29 is made by bending a spring steel plate or a stainless steel spring steel plate, or by extruding a light alloy material such as aluminum, and is attached to the approximately central portion of the flat web 30. A receiving portion 31 for the bolt 27 is formed in a protruding shape, and a horizontal portion of the receiving portion 31 is provided with a receiving portion 31 for the bolt 27.
A hole 32 through which the hole 7 is inserted is provided. Further, edge pieces 33 are formed on both edges of the long side of the web 30, and cuts C1 and C2 are formed on the edge of the short side, and a locking piece 33 is formed in the center portion to engage with the locking protrusion 25 of the cover member 21. A retaining pawl 34 is formed, and edge pieces 3 are provided on both sides of the retaining pawl 34.
5 is formed. The locking member 29 formed in this way is brought into contact with the lower surface of the ceiling part 1 corresponding to the spring member 3 in a straddling manner, and the bolts 27 are inserted into the mutual holes 8 and 32 from the lower side as shown in the figure. The nut 28 is screwed onto the bolt 27.
8, the spring member 3 is elastically deformed into an expanded shape as in the first embodiment, and is attached to the ceiling portion 1 by its restoring force. Like this〓
Locking members 29 attached to the space T at predetermined intervals
When the cover member 21 is crowned and pressed from below in the figure, the locking claws 34 of the locking member 29 and the locking protrusions 25 of the engaging edge formed on the cover member 21 are engaged, and the cover member 21 is closed. 〓It is elastically attached to the space T in a shielding manner. Therefore, this second embodiment also provides the same effects as the first embodiment.

In this example, the cover member 21 is elastically fixed to the locking member 29, but the present invention is not limited to this, and the cover member 21 may be fixed using bolts, rivets, etc., for example.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIG.
As shown in the figure, the joint 37 covers the space T between the ceiling part 1 and the wall body 36 that constitute the inside corner R, and the joint 37 is connected to the support member 38, the spring member 43, the cover member 50 and It is composed of a connecting member 14.

Reference numeral 38 denotes the above-mentioned long or short support member, and this support member 38 is attached along the surface of the wall 36 of the space T, and its attachment piece 39
A receiving piece 40 is formed at the upper end to extend horizontally to the left in the drawing with a predetermined width and is bent upward in the drawing, and on the lower surface of the receiving piece 40, a receiving piece 40 is formed to hang downward by a predetermined length. A contact piece 41 is formed. Furthermore, an engagement piece 42 having a substantially hook-shaped cross section is formed at the lower end of the attachment piece 39 .

43 is the above-mentioned spring member, and this spring member 43 is attached to the ceiling part 1 and the support member 38 at a predetermined interval along the longitudinal direction of the space T on the inside (back side) of the ceiling part 1 and the support member 38. It is arranged in a straddled manner and is made by bending spring steel or stainless steel, and its shape includes a horizontal receiving part 44 in the center; A long leg piece 45 and a short leg piece 46 are provided obliquely at predetermined angles α and α' on both sides of the body.
The end portions 6 are bent upward in a curved shape to form arcuate end portions 47, respectively. In addition, the receiving part 4
A reinforcing plate 48 is fixed to the upper surface of 4, and
A hole 49 through which a connecting member is inserted is provided approximately at the center thereof.

Reference numeral 50 is the above-mentioned cover member, which is a long member similar to the first embodiment, and in its cross section, 51 is a web provided horizontally, and a presser member 19 is provided at the left end of the web 51 in the figure. A dovetail groove 52 into which the web 51 is fitted is formed along its longitudinal direction, and a vertical edge 53 of a predetermined length is provided at the right end of the web 51 in the drawing, and a presser member is fitted along the longitudinal direction of the lower end thereof. A dovetail groove 54 into which the support member 19 is fitted is formed, and an engagement protrusion 55 that engages with the engagement piece 42 of the support member 38 is provided in the dovetail groove 54 in a protruding manner. Further, holes 56 are formed through the web 51 at predetermined intervals along its longitudinal direction, and have a predetermined length in its width direction, through which the bolts 15 of the connecting member can be inserted.

Note that the connecting member is the bolt 1 as in the first embodiment.
5 and nut 18.

The cover member 50 thus formed has an elongated hole 56 into which the bolt 15 is inserted, and an engagement protrusion 5 which projects into the dovetail groove 54 of the cover member 50.
5 is engaged with the engagement piece 42 of the support member 38, and the other dovetail groove 52 side is provided in a straddling shape in contact with the outer surface of the ceiling. A spring member 43 is inserted through the hole 49,
Furthermore, a nut 18 is screwed together. As this nut 18 is screwed forward, it is elastically deformed as shown by the two-dot chain line in the figure, and this spring member 43
When the short leg piece 46 comes into contact with the wall 36 during the deformation process, the long leg piece 45 side is in a free state, so the bolt 15 becomes vertical as shown in the figure, and the elastic restoring force of the spring member 43 causes the cover to close. The member 50 is
The spacer T and the support member 38 are attached in a shielded manner.

Therefore, the joint 37 of this third embodiment
In the space T between the ceiling 1 and the wall 36 that constitute the corner R of the building frame, one of the walls 36
At the same time, a support member 38 is attached along the longitudinal direction of the space T, and a spring member 43 is installed along the inner longitudinal direction of the space T in a manner spanning over the ceiling portion 1 and the support member 38, and is elastic. Arranged so that it can be displaced, and
An elongated cover member whose engaging protrusion 55 provided at one end in the outer longitudinal direction of the space T engages with the engaging piece 42 of the support member 38, and whose other end slidably abuts against the ceiling 1. 50, the spring member 43 and the cover member 50
A connecting member consisting of a bolt 15 and a nut 18 is interposed between the third embodiment and the support member 38, so that the third embodiment is also similar to the first embodiment. It has the same effect as the above.

(Fourth Embodiment) Next, FIGS. 6 and 7 show a fourth embodiment of the present invention.
9, the connecting member and the cover member are different from those in the third embodiment, and the cross-sectional shape of the cover member 60 is such that a presser member 19 is attached to the left end of the web 61 having a predetermined width along its longitudinal direction. A dovetail groove 62 to be fitted is formed, and an engaging edge 63 having a plurality of locking protrusions 64 on the inner surface is provided along the longitudinal direction near the dovetail groove 62 and at the right end of the web in the figure. . Further, a vertical edge 65 of a predetermined length is provided near the right end of the web 61 in the figure, and a dovetail groove 66 into which the presser member 19 is fitted is formed along the lengthwise direction of the lower end of the vertical edge 65. An engagement protrusion 67 that engages with the engagement piece 42 of the long or short support member 38 is provided in the groove 66 in a protruding manner. Further, this connecting member 68 is composed of a bolt 15, a nut 18, and a locking member 69, and this locking member 69 is connected to the ceiling part 1 in correspondence with the spring member 43.
This locking member 6 is disposed on the lower surface (also referred to as the outside) in the figure and elastically locks the cover member 60.
Similar to the locking member 29 of the second embodiment, 9 is formed by bending a spring steel plate or a stainless steel spring steel plate, or by extruding a light alloy material such as aluminum, and is located approximately at the center of the flat web 70. A receiving part 71 for the bobolt 15 is formed in a protruding manner near the end of the bolt 15, and a long hole 72 through which the bolt 15 is inserted and allows movement of the bolt 15 is provided in the horizontal part of the receiving part 71. has been done. Note that the other shapes are the same as those of the locking member 29. The locking member 69 formed in this way is brought into contact with the lower surface (as shown in the figure) of the ceiling part 1 corresponding to the spring member 43 (between the outer side and the support member 38) in a straddling manner, and is inserted into the mutual holes 49 from below in the figure. , 72, the nut 18 is screwed onto the bolt 15, and by screwing the nut 18, the spring member 43 is elastically deformed into an expanded shape as in the third embodiment, and its restoring force is The ceiling part 1 and the support member 38 are attached in a sandwiched manner.In this way, the cover member 60 is crowned from below in the figure between the locking members 69 attached at a predetermined interval to the interspace T. When pressed, the locking member 69
The locking claw 34 of the cover member 60 is engaged with the locking protrusion 64 of the engaging edge 63 formed on the cover member 60.
0 is elastically attached to the space T in a shielding manner. Therefore, the fourth embodiment also provides the same effects as the first embodiment.

In the third and fourth embodiments described above, as shown in FIG.
The configuration may be such that the arcuate end portion 47 of the leg piece 46 is engaged with. In addition, as shown in FIG.
The distal end side of the spring is formed into a substantially U-shape as shown in the figure, and a locking portion 74 having a locking pawl 75 is provided on the distal end side so that a convex portion 73a provided at the end of the spring locking piece 73 is elastic. It may also be configured to be locked. Also,
As shown in FIG. 10, the arcuate end portion 4 of the short leg piece 46 of the spring member 76 is folded back downward.
7a may also be used. In addition, this cover member 77 omits the engaging pieces 63 formed on the left and right sides of the cover member 60 in the fourth embodiment, and the grooves 62 and 66 are omitted.
A locking member 79 that is provided with an engaging protrusion 62a and a projecting edge 78 and that locks this cover member 77 is as follows.
As shown in FIGS. 10 and 11, a horizontal web 80 and a vertical edge 6 along the web 61 of the cover member 77
5 is formed into a substantially hook shape, and a receiving portion 82 having a long hole 83 is formed on the right side of the horizontal web 80, and a locking pawl 84 and an edge piece 85 are formed on the left edge in the figure. is formed, and
A part of the upper side of the vertical web 81 is cut and raised to form an abutment piece 86. The cover member 77 may be elastically locked by the locking member 79 formed in this manner.

In addition, the spring members 3 and 4 in each of the above embodiments
3 and 76 are exemplified by bending and forming a spring steel plate or a stainless steel spring steel plate, but the invention is not limited to this, and FIGS. 12 to 1
The structure may have the configuration shown in FIG. That is, the spring member 87 shown in FIG. 12 consists of a receiving part 88 and left and right leg parts 89, and this receiving part 88 has edge pieces 88b and
88c is formed into a substantially box-like shape that is open downward, and a hole 88d is provided at the approximate center of the web 88a to pass through the bolts 15, 27 of the connecting member, and a corresponding edge piece 88b is provided with a hole 88d at a predetermined interval. A recess or hole 8 into which the leg piece 89 is fitted or inserted.
8e is formed. Further, the leg piece 89 is formed by bending and forming a spring wire material, and a mounting piece 89b is provided at the base of the leg piece 89a which is inclined at a predetermined angle, and the tip side is formed by bending upward. A holding portion 89c is formed. The left and right leg portions 89 may be separate or integrated, or may be fixed to the receiving portion 88 by welding means. The spring member 90 in FIG. 13 is composed of a pair of spring elements 91 and 92, which are formed in a symmetrical shape and are attached to one end of horizontal mounting webs 91a and 92a. Leg pieces 91b and 92b are provided which are inclined at a predetermined angle, and arcuate end portions 91c and 92c are respectively formed in an upwardly curved manner at the end sides of the leg pieces 91b and 92b. Further, a bolt 1 of a connecting member is provided approximately at the center of the mounting web 91a of the spring element 91.
A hole 91d through which the holes 5 and 27 are inserted is provided, and a holding piece 91e is formed by making cuts C1 and C2 on both sides of the holding piece 91e so that the mounting web 92a of the spring element 92 can be sandwiched therein. At approximately the center of 92a is a hole 92 that aligns with hole 91d.
d is installed through it. Further, the spring member 93 shown in FIG.
4a, 95b as the main body, and the leg pieces 94a, 95
The upper end side of a is bent into a substantially U-shape to form a mounting portion 94.
b, 95b are formed, and these mounting portions 94b, 95
Holes 94d and 95d through which the bolts 15 and 27 can be inserted are provided at approximately the center of the upper pieces 94c and 95c of b, and holes 94d are provided at approximately the center of the folded edges of the mounting portions 94b and 95b. , 95d are provided with semicircular arc-shaped recesses 94e and 95e. Spring elements 94, 95 formed in this way
When the bolts 15, 27 are inserted through the holes 94d, 95d and the leg pieces 94a, 95a are elastically deformed, the restoring force engages the holes 94d, 95d and the threaded portions of the recesses 94e, 95e. A cover member and a locking member can be attached.

Further, in each of the above embodiments, the connecting member is illustrated as being composed of a bolt, a nut, or a bolt, nut, and a locking member, but the configuration is not limited to this. For example, the configuration shape shown in FIGS. 15 to 18 You can also use it as That is, in the case shown in FIG. 15, hooking members 96 are attached to the spring member 3 and the cover member 9 or the locking member 29, respectively, and a coil spring 97 having a predetermined tensile pressure is installed between the hooking members 96. By hanging, the spring member 3 is elastically deformed, and the cover member 9 and the locking member 29
can be installed. Further, in FIG. 16, a torsion spring 98 is attached instead of the coil spring 97. In addition, the one in FIG. 17 is the illustrated spring member 9.
This spring member 99 utilizes the elastic deformability of the spring element 9 itself, and the spring element 99 forms a symmetrical pair of spring elements 1.
00, one end of the horizontal web 101 of the element 100 is obliquely provided with a leg piece 102 having an arcuate end portion at the tip, and the web 10
A locking piece 103 having a predetermined length and having a locking protrusion 104 at its tip is vertically provided at the other end of the locking member 1 . The spring element 100 formed in this way has mutual locking pieces 10
4 are brought into contact with each other in an overlapping manner and are integrally connected by studs 105 or the like to form a spring member 99. Furthermore, an engaging piece 106 having an engaging claw 107 at its tip is provided at approximately the center of one of the cover members 9 or the locking member 29 . The spring member 99 formed in this way is pressed and elastically deformed to form the locking piece 1.
03 to the engagement piece 106, the cover member 9 or the locking member 29 is locked. Also, FIG. 18 has a configuration opposite to that of FIG. 17, and there are leg pieces on both sides of the receiving part 109 of this spring member 108.
10 is formed, and an engaging piece 111 having a locking claw at the lower end is provided on the lower surface of this receiving piece. Further, an engaging piece 113 having an engaging claw 114 at the tip is provided on the substantially central portion of the cover member 9 or the locking member 29 so that the engaging pieces 113 engage with each other.

(Effects of the Invention) The present invention provides for a spring member to be disposed in a straddling manner and elastically displaceable along the inner longitudinal direction of the space between the protruding frames of a building frame, and at the same time, the spring member is disposed so as to be elastically displaceable. A long cover member is disposed in the outer longitudinal direction of the gap, and a connecting means is interposed between the spring member and the cover member, and an end of the spring member is movable inside the protruding body. By arranging the above-mentioned spacer and covering the space with a cover member,
Even if there is a slight variation in the protruding frame, this can be dealt with. For example, even if there is a building structural material of the protruding frame close to the bottom, this can be coped with by adjusting the connecting means. The cover member or the locking member can be attached with a constant holding force, and even if the thickness dimension of the protruding body differs, it can be easily attached, and the adjustment dimension can be increased. Furthermore, since the cover member does not use screws to attach, it can also be attached to a protruding body made of a board or the like.

In addition, in the space between the protruding frame and the wall frame that constitute the entrance corner of the building frame, a support member is attached to one wall frame along the longitudinal direction of the gap, and A spring member is disposed along the inner longitudinal direction so as to span over the other protruding body and the support member, and is elastically displaceable;
A long cover member is disposed in the outer longitudinal direction of the gap, one end of which engages with the support member, and the other end of which slideably abuts on the other protruding frame, so that the spring member and the cover member are connected to each other. A connecting means is interposed between the spring members, and the end portion of the spring member is disposed movably inside the protruding body, and the outer space and the support member are covered with a cover member. It can be easily installed even in corner areas, and it can cope with slight fluctuations in the protruding frame and wall frame. Even in such cases, by adjusting the connecting means, the cover member or the locking member can be installed with a constant holding force, and it can be easily installed even if the thickness of the protruding frame differs. It is possible to increase the adjustment dimension.

[Brief explanation of drawings]

1 and 2 show a first embodiment of the present invention, FIG. 1 is a longitudinal sectional view, FIG. 2 is a perspective view of a spring member, and FIGS. 3 and 4 are a second embodiment of the present invention. 3 is a longitudinal sectional view, FIG. 4 is a perspective view of a spring member and a locking member, FIG. 5 is a longitudinal sectional view showing a third embodiment of the present invention, and FIGS. 6 and 7 6 shows a fourth embodiment of the present invention, FIG. 6 is a longitudinal sectional view, FIG. 7 is a perspective view of a locking member, and FIGS. 8 to 11 are longitudinal sectional views showing other aspects of the fourth embodiment. , FIGS. 12 to 14 are perspective views showing another embodiment of the spring member, and FIGS. 15 to 18 are longitudinal sectional views showing another embodiment of the connecting means. 1... Ceiling part, 2, 20, 37, 59... Expansion joint, 3, 43, 76, 8
7,90,93,99... Spring member, 9,21,
50, 60, 77...Cover member, 14, 26...
...Connecting member, 15, 27, 57... Bolt, 1
8, 28, 58...Natsuto, 29, 69, 79...
...Locking member, 38...Supporting member, 36...Wall body,
97...Coil spring, 98...Torsion spring, T...
〓Between.

Claims (1)

[Scope of Claims] 1. A spring member is disposed in a straddling manner and elastically displaceable along the inner longitudinal direction of the space between the protruding frames of the building frame, and the spring member is arranged so as to be elastically displaceable. A long cover member is disposed in the outer longitudinal direction, and a connecting means is interposed between the spring member and the cover member, and an end of the spring member is disposed so as to be displaceable inside the protruding body. The expansion joint has a structure in which the intervening portion is covered with a cover member. 2. In the space between the protruding frame and the wall frame that constitute the entrance corner of the building frame, a supporting member is attached to one wall frame along the longitudinal direction of the gap, and a supporting member is attached to the inner side of the gap. A spring member is disposed so as to span the other protruding body and the supporting member along the longitudinal direction and to be elastically displaceable, and one end of the spring member is engaged with the supporting member in the outer longitudinal direction of the spacer. an elongated cover member whose other end is slidably abutted against the other protruding frame, and a connecting means is interposed between the spring member and the cover member; The expansion joint is configured such that the end portion is movably disposed inside the protruding body, and the intermediate portion and the support member are covered with a cover member. 3. A patent in which the connecting means has a locking member that locks the cover member on the outside of the gap, and the cover member is locked to the locking member to cover the gap. The expansion joint according to claim 1 or 2.