JP7156733B1 - expansion joint - Google Patents

Abstract

[Problem] To provide an expansion joint having a structure in which a joint cover is supported by a cover supporting device installed in a gap, and in which the joint cover can be secured to a specified movable amount even if the gap is wider or narrower than the design specifications. allow it to be installed.
SOLUTION: Instead of connecting both ends of a cover support device 4 directly to the ends of a frame within a gap G, support bases 5, 5 are attached to the ends of the frames A, B, The support surface portions 52, 52 that support the end portion of the cover support device 4 are protruded. The joint position of the end portion of the cover support device 4 is adjusted along the width direction of the gap G on the support surface portions 52, 52 to ensure the specified movable amount of the joint cover 2 and the cover support device 4. FIG.
[Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to the structure of an expansion joint that forms an expansion joint by covering a gap in a frame provided in a structure or building with a joint cover.

Large structures and buildings should be divided into multiple frames with gaps between them in order to avoid the effects of expansion and contraction due to temperature changes and the application of loads during earthquakes. is built. An expansion joint is installed in the gap, and the opening of the gap is covered with a joint cover that spans between the frames.

In order to prevent the seam cover from slipping to one side of the frame or sinking into the gap when the space between the frames is greatly displaced due to an earthquake and the width of the gap widens or narrows, the distance between both ends is In some cases, a cover support device configured to expand and contract is attached to the inside of the gap, and the cover support device supports the seam cover (see, for example, Patent Documents 1 and 2).

JP-A-9-184204 JP 2017-43904 A

In the case of gaps in buildings, the building accuracy of the frame on both sides appears as a joint error, so the difference between the design specifications and the actual construction dimensions tends to be large.
When the seam cover is supported by a cover support device installed in the gap, the cover support device was conventionally installed with both ends directly connected to the ends of the frame facing the gap. If the joint cover is wide and narrow, there is a possibility that the seam cover supported by the cover support device cannot satisfy the movable amount specified by various standards.

In particular, in areas where the product width exposed to the surface is limited, such as when a seam cover is installed in the gap between the wall and floor of a building, the seam cover is placed along the opening surface of the gap. The center position (hereinafter also referred to as "movable center") of the cover supporting device installed in the gap tends to be displaced along the width direction of the gap. In this case, if the displacement of the movable center is large, even if the installation position of the joint cover is adjusted to align with the movable center of the cover support device, the misalignment of the two members cannot be absorbed, and the joint cover is properly adjusted. You may not be able to install it in the correct position.

The seam cover and the cover support device are separately manufactured by factory processing, transported to the construction site of the expansion joint, and integrally assembled in the gap. Since both ends are directly connected to each other, it is difficult to adjust the mounting position at the installation site.

In view of such problems of the prior art, the present invention provides an expansion joint having a cover supporting device installed in the gap to support the joint cover, and the gap is wider and narrower than the design specifications. To install a seam cover while ensuring a specified movable amount, and to stably support the seam cover on a gap opening surface by a cover support device without causing misalignment. is the subject.

As described above, the expansion joint configured to support the seam cover with the cover support device is installed by directly connecting both ends of the cover support device to the ends of the frame facing the gap, and the position of the members can be adjusted. etc., there is a risk that the specified amount of movement cannot be satisfied when installed in a gap with a large width due to joint error. When the width is restricted, it is inevitable that the center of movement of the joint cover and the cover device will deviate greatly, resulting in misalignment.

Therefore, in the present invention, instead of directly connecting both ends of the cover supporting device to the ends of the frame in the gap, members for supporting the ends of the cover supporting device are stretched in the gaps at the ends of the frame. The joint cover and the cover are supported even in a wide gap due to a joint error, by setting the cover support device so that the connection position of the end portion of the cover support device can be adjusted along the gap width direction on this member. Ensure that the stipulated amount of movement of the device is secured, and if the joint between the wall and floor of the building and the width of the product exposed on the surface are limited, the center of movement should be aligned by absorbing misalignment. made it possible.

That is, the expansion joint of the present invention includes a joint cover that covers a gap between two main bodies, and a cover support device that is provided in the gap and supports the joint cover in the gap, and has a gap width at both ends thereof. a cover support device provided so that the distance along the direction can be expanded and contracted , and
A support base having a support surface protruding into the gap is attached to each of the ends facing the gap of the two skeletons,
Rail members having grooves are mounted on the support surface of the support base with the openings of the grooves facing upward, and legs provided at both ends of the cover support device extend along the rail members. An expansion joint having a structure connected so as to be slidably displaceable in the gap length direction ,
The support surface portion of the support base protrudes horizontally within the gap, and the width of the protrusion of the support surface portion constitutes an adjustment allowance (AJ) for the mounting position of the rail material, and the mounting position of the rail material on the support surface portion is determined by the gap width. By adjusting along the direction, it is possible to adjust the distance between the connecting position of the end of the cover support device on the support surface and the end of the frame to which the support base is attached. It is characterized by being configured as
In addition, in the expansion joint having the above configuration, instead of attaching a support base having a support surface portion protruding into the gap to the end facing the gap of both skeletons, the end of one skeleton only attach said support base,
A cover support device has one end connected to the other skeleton end facing the gap, either directly or via a support, and the other end mounted on the support surface of the support base. characterized in that it has a configuration in which it is connected to the rail material and installed in the gap.

In the expansion joint configured as described above, the cover support device is characterized in that it has a shaft portion at least in the central portion between both ends thereof, and has a structure in which this shaft portion is pivotally supported by the joint cover.
Rail members are attached to the support surface portions of the support base, and leg portions provided at the end portions of the cover support device are connected along the rail members so as to be slidably displaceable in the lengthwise direction of the gap. characterized by having

Further, as a joint cover of the expansion joint having the above configuration, a cover material formed so as to be able to expand and contract along the width direction of the gap is connected to both sides of the center material extending in the length direction of the gap using a material having elasticity. can be used.
Rubber or a synthetic resin material can be used as the material having elasticity.
Also, the joint cover and the cover material may be partially or wholly made of steel, aluminum, stainless steel, or the like.

In the expansion joint having the above configuration, the stop between the support bases attached to the ends of both skeletons, or between the support base and the support material when one of the skeletons has a support base and the other skeleton has a support material attached. It is characterized by having a structure in which a water auxiliary sheet is installed.
In addition, the center members are aligned by contacting one end of the center member with the end of the other center member, and the contacting ends are connected to the joint body, so that the center members are connected to each other. A seam cover is constructed by being seamed along the length of the gap.

Further, as a cover support device for the expansion joint having the above configuration, a shaft portion engaged with a frame portion provided in the center member of the joint cover and rotatably connected to the center member and a width dimension of the gap between the skeletons. A long arm member is provided, the central portion of the arm member is rotatably connected to the shaft portion, and both ends of the arm member are installed so as to bridge between the support surface portions of the two support bases. can use things.
A bar support device having a pantograph mechanism or a bellows mechanism that expands and contracts the distance between the ends may be used.

According to the expansion joint of the present invention, the support base is installed at the end of both skeletons facing the gap, and the cover support device is supported in the gap by attaching both ends of the cover support device between the support surface portions of both support bases. be done.
In addition, in a mode in which the support base is attached to one end of the frame facing the gap, one end of the cover support device is connected to the other end of the frame facing the gap directly or via a support material. and the other end is connected to the support surface of the support base to support the cover support device in the gap.
Since the support surface portion of the support base protrudes into the gap, the connection position of the end portion of the cover support device within the support surface portion can be shifted along the width direction of the gap. can be adjusted to adjust the distance between the connection position of the end of the cover support device on the support surface and the end of the frame to which the support base is attached, and the width of the gap is the joint Even if there is a large width due to an error, the specified movable amount of the joint cover and the cover support device can be secured. In addition, when the product width exposed to the surface is limited by the expansion joint that covers the gap between the wall and floor of the building, a support base is installed at the end of both frames facing the gap to support the cover. By supporting the device, misalignment between the joint cover and the cover support device can be absorbed, and it is possible to align their movable centers.

In general, the term "framework" refers to the structure of a building, or the part corresponding to the framework that supports the building structure. The part where the cover material is installed on both sides of the gap provided in the building is called the "framework".
INDUSTRIAL APPLICABILITY The present invention can be applied to an expansion joint installed in a frame gap provided on a floor surface, an inner wall surface, an outer wall surface, and a ceiling surface of a building.

1 is a schematic cross-sectional end view of an embodiment of an expansion joint of the present invention installed in a building gap; FIG. FIG. 4 is an enlarged external view of a main part of the cover material; FIG. 4 is a configuration diagram showing the center member of the joint cover, the cover support device, the rail member, and the members of the support base separated from each other; 4 is an enlarged external view of a main part of the support base; FIG. FIG. 4 is an enlarged external view of a main part of the rail material; FIG. 10 is a view showing a mode of adjusting the attachment position of the rail material on the support surface portion of the support base; It is the figure which showed the aspect which constructs a water stop auxiliary sheet|seat to a support base. FIG. 10 illustrates an embodiment of a factory fabricated cover support device; FIG. 4 is a schematic plan view of a cover support device installed on both skeletons via a support base within a gap; FIG. 4 is a schematic cut end view of a portion where the center members of the joint cover are joined together. 8A is a schematic plan view showing the operation of the cover support device when the gap is narrowed, and when the gap is widened, FIG. It is a schematic cross-sectional end view of a mode in which the expansion joint of the present invention is installed in the gap between the wall surface and the floor surface of the building, (A) is a normal width gap, and (B) is a narrow gap. It is a mode. An embodiment of an expansion joint using a seam cover made of a single cover material for the gap between the corner of the wall surface of the building and the floor surface, (A) is a plan view of the normal time, (B) is a plan view when widening or narrowing occurs in the gap. An embodiment of an expansion joint using a joint cover made by arranging two cover materials in the gap between the corner part of the wall surface of the building and the floor surface. ) is a plan view when widening or narrowing occurs in the gap. FIG. 4 is a schematic cross-sectional end view of another embodiment of the expansion joint of the present invention installed in a building gap; FIG. 11 is a schematic cross-sectional end view of a mode in which an expansion joint according to still another embodiment of the present invention is installed in a building gap; FIG. 11 is a schematic cross-sectional end view of a mode in which an expansion joint of yet another embodiment of the present invention is installed in a building gap;

Preferred embodiments of the present invention will be described below with reference to the drawings, but the technical idea of the present invention is not limited to the embodiments described below.
Each figure shows the expansion joint and the cut end surface of the frame, but the hatching representing the cross section is partially omitted so that the shape of the member can be easily distinguished. Further, in the following description, the illustrated states are used as a reference when specifying directions and orientations such as upward, downward, upper, and lower surfaces of the members. Each member constituting the expansion joint is installed by joining a plurality of members along the length direction of the gap.

FIG. 1 shows an embodiment in which the present invention is applied to an expansion joint for floors.
This expansion joint 1 spans a joint cover 2 between a floor surface AF of a building frame A and a floor surface BF of a building frame B, which face each other at the same height across a gap G arranged on the floor surface of a building. G is covered and both floor surfaces AF and BF are continuously connected.

More specifically, the illustrated expansion joint 1 includes a joint cover 2 covering the opening upper surface of the gap G, supporting members 3, 3 provided at the ends of the skeleton A and the skeleton B facing the gap G, and the joint cover 2 covering the gap. G and support bases 5, 5 for supporting the cover support device 4 in the gap G. 2 is supported by a cover support device 4, and the gap G is covered with the joint cover 2, and when the skeletons A and B are relatively displaced due to an earthquake or the like and the gap G expands, contracts, or shifts, the displacement is followed. The seam cover 2 is elastically deformed or slides along the support members 3, 3 to absorb the displacement, and the floor surfaces AF, BF are maintained as flat surfaces without missing portions. .

The joint cover 2 includes a center member 21 formed in a long tubular shape elongated in a belt shape along the length direction of the gap G, cover members 22, 22 connected to both sides of the center member 21, and the cover member 22. It has joint materials 23, 23 that fit into the concave surface portion 22c at the center of the upper surface of the upper surface, and is formed in a long belt shape.

As shown in FIGS. 1 and 3, the center member 21 is a cylindrical body made of an aluminum profile having an opening 21a with a substantially rectangular cross section inside, and protruding pieces 22b of the cover member 22 on both sides thereof. guide recesses 21b, 21b engaged with the guide recesses 21b, and a hook-shaped recessed frame portion 21c engaged with the end portion of the shaft portion 41 of the cover support device 4, which will be described later, are integrally formed at the bottom.
As will be described later, the shaft portion 41 of the cover support device 4 is engaged with the recessed frame portion 21c of the center member 21. The recessed frame portion 21c is formed into a hook shape with a gap at the center of the lower end. By inserting a nut screwed to the end of the shaft portion 41 into the recessed frame and passing the shaft portion 41 through the gap, the shaft portion 41 can be slid along the recessed frame portion 21c without rotating. By loosening the nut screwed to the shaft portion 41 outside the recessed frame portion 21c, the shaft portion 41 is slid along the recessed frame portion 21c, and tightened at an appropriate position to center the shaft portion 41. It can be fixed at an appropriate position in the material axial direction of the material 21 .

The cover material 22 is a member made of a material having rubber elasticity, preferably a thermoplastic elastomer, and is elastically deformable. As shown in FIGS. , projecting piece portions 22b, 22b provided on both sides of the covering surface portion 22a and connected to the center member 21 and the support members 3, 3, respectively, and a concave portion recessed downward provided in the central portion of the covering surface portion 22a. 22c, and hollow portions 22d, 22d located below the covering surface portion 22a and on both sides of the concave surface portion 22c.

The joint material 23 is made of the same material as the cover material 22. The central part of the joint material 23 is inserted into the concave surface part 22c of the cover material 22 to close the upper end opening, and the both side edges of the joint material 23 are on both sides of the concave surface part 22c. It is formed long with a cross-sectional shape that overlaps the covering stitches 22a, 22a.

The joint cover 2 engages the guide recesses 21b, 21b on both sides of the center member 21 with the projecting pieces 22b, 22b on one side of the cover members 22, 22 so that the cover members 22, 22 are attached to both sides of the center member 21. are connected, and joint materials 23, 23 are attached to the concave portions 22c, 22c of both cover members 22, 22, and the other sides of both cover members 22, 22 are connected to support portions 3, 3 described later. It is attached along the opening surface of the gap G, and when the frames A and B are relatively displaced, the cover materials 22 and 22 expand and contract along the width direction of the gap G so as to absorb the displacement. It has become.

The support members 3, 3 are made of aluminum material and are elongated along the length direction of the gap G. A concave portion 31 is provided on one side of the support members 3 and engages with the projecting piece 22b of the cover member 22. is positioned in the gap G, the other side is fixed to the skeletons A and B with a fixing member F such as an anchor bolt together with the support base 5 described later, and along the edges of both skeletons A and B facing the gap G installed.

As shown in FIGS. 1 and 3, the cover supporting device 4 is located at the center of an arm member 42 which is a tubular body having a substantially rectangular hollow cross-section with both ends longer than the width dimension of the design specifications of the gap G. A shaft portion 41 is formed by passing shaft portions 42 and 42 through both ends, respectively, and screwing a nut N from the outside of the arm member 42, and connecting the shaft portions 41, 43, and 43 to the arm member 42 so as to be rotatable. I have
On the lower surface of both ends of the arm member 42, base members 6, 6 , which are legs made of aluminum and bent into an L-shape, are attached so as to be rotatable around both shaft portions 43, 43. End portions 61, 61 formed in a substantially cylindrical shape of 6, 6 are inserted into recessed groove portions 71, 71 of rail members 7, 7 mounted on support surface portions 52, 52 of support bases 5, 5 as will be described later. inserted inside. Of the ends 61, 61 of the two substrates 6, 6 inserted into the grooves 71, 71, one end 61 is fixed by screwing into the groove 71, and the other end is a rail material. 7 are provided so as to be slidable.

As described above, the cover support device 4 connects the base members 6, 6 attached to both ends of the arm members 42 to the rail members 7, 7 attached on the support surfaces 52, 52 of the support bases 5, 5. A nut N is screwed into the recessed frame portion 21c provided in the center member 21 of the joint cover 2 with respect to the joint cover 2 installed on the opening surface of the gap G. The upper end of the shaft portion 41 in the central portion of the member 42 is inserted to engage with the recessed frame portion 21c, and the arm member 42 is attached so as to be rotatable around the shaft portion 41 in the central portion of the joint cover 2. 2 is supported from within the gap G, and when the skeletons A and B are relatively displaced as described later and the width of the gap G changes, the arm member 42 rotates around the shaft portion 41 and both ends thereof slides along the rail members 7, 7 to maintain the position of the center member 21, which is the central portion of the joint cover 2, at the central portion of the arm member 42, and the joint is positioned at the center of the displacement width of the gap G. The movable center of the cover 2 is held.

The support base 5 is made of aluminum and has a hook-shaped cross section in which the upper and lower surfaces are folded in opposite directions parallel to each other. As shown in FIG. 4, an attachment surface portion 51 whose upper surface overlaps the upper surfaces of the skeletons A and B, and a suitable lower surface which projects horizontally into the gap G in a state where the attachment surface portion 51 is attached to the skeletons A and B. The support surface portion 52 has a width. A plurality of holes 51a through which the fixing member F is inserted are provided in the attachment surface portion 51, and a concave groove 53 to which the end portion of the auxiliary waterproof sheet 9 is attached is formed at the tip portion of the support surface portion 52. As shown in FIG.

Similarly to the support base 5, the rail member 7 attached to the support surface portion 52 of the support base 5 is an elongated member formed along the length direction of the gap G by an aluminum profile. 5, concave grooves 71 are formed on the upper surface thereof along the material axial direction into which the base material 6 attached to both ends of the arm material 42 of the cover support device 4 is inserted.

As shown in FIG. 1, the support base 5 is integrated with both the skeletons A and B with the fixing member F by overlapping the support member 3 on the mounting surface portion 51 on the edge of the skeletons A and B facing the gap G. The support bases 5, 5 fixedly attached to both skeletons A, B have their support surface portions 52, 52 facing each other in the gap G and horizontally protruding so that the cover support device 4 can be moved in the gap G. A supporting platform is constructed.
Then, the rail members 7, 7 are attached on both support surface portions 52, 52 in parallel along the length direction of the gap G. At this time, as shown in FIG. In other words, the width of the projection of the support surface portion 52 serves as an adjustment allowance (AJ) for the mounting position of the rail member 7 . As a result, even if the width of the gap G varies with respect to the design specifications, the movable center of the cover support device 4 whose both ends are supported by the rail members 7, 7 and the opening of the gap G can be installed along the opening surface of the gap G. The joint cover 2 can be supported by the cover support device 4 by aligning the movable centers of the joint covers 2 and aligning the movable centers with each other by compensating for misalignment.

The installation of the expansion joint 1 of this embodiment, which is composed of these members, to the gap G can be performed, for example, by the following procedure.

First, as shown in FIG. 7, the supporting members 3, 3 and the supporting bases 5, 5 are attached to the edges of the building bodies A, B facing the gap G, respectively.
The mounting surface 51 of the support base 5 and the support member 3 are superimposed on the edges of the skeletons A and B, and then the fixing member F is attached with a washer between both members. It is carried out by inserting it and driving it into the frame A, B to fix it.
The support bases 5, 5 attached to both the skeletons A, B have the support surface portions 52, 52 facing each other in the gap G and protruding horizontally, and the recessed grooves 53, 53 at the ends of the respective support bases 5, 5 have ends of the auxiliary waterproof sheet 9. A water stop auxiliary sheet 9 is installed between the ends of the support bases 5 , 5 .

Next, the cover support device 4 is installed on the support surface portions 52, 52 projecting into the gap G between the support bases 5, 5. As shown in FIG.
The cover supporting device 4 is assembled by factory processing, and as shown in FIG. The ends 61, 61 of the members 6, 6 are inserted into the recessed grooves 71, 71, respectively, and the rail members 7, 7 are engaged and attached.
Then, with the cover support device 4 positioned on the support surfaces 52, 52 in the gap G, the seam cover is supported on the cover support device 4 according to the actual width of the gap G as described above. The mounting positions of the rail members 7, 7 are adjusted on the support surface portions 52, 52 so that the movable center of the cover support device 4 is positioned at the center of the gap G, and the installation position of the cover support device 4 is positioned. The cover support device 4 is installed by screwing fixing members F such as screws into the recessed grooves 71, 71 of the rail member 7 and fastening the rail members 7, 7 to the support surface portions 52, 52 (see FIG. 1). The bases 6, 6 engaged with the rail members 7, 7 are fixed such that the end 61 of one of the bases 6 is screwed into the recessed groove 71 with a fixing member F, and the other base is fixed. An end portion of the material 6 is slidably provided along the rail material 7 .

By fastening the rail members 7, 7 to the support surface portions 52, 52, the cover support device 4 is supported on the support surface portions 52, 52 within the gap G, and attached to the upper end of the shaft portion 41 of the cover support device 4. The center material 21 is arranged in the opening plane of the gap G and at the center in the width direction thereof.

Cover materials 22, 22 are attached between the center material 21 and the support members 3, 3 attached to the edges of both skeletons A, B, and joints are formed on the concave surfaces 22c, 22c of both cover materials 22. The opening of the gap G is covered with the joint cover 2 by immersing the material 23, and the both sides of the gap G are flattened along the floor surfaces AF and BF to complete the installation of the expansion joint 1. - 特許庁

The expansion joint 1 is constructed by joining the above constituent members together along the length direction of the gap G, as shown in FIG.
In this case, the center members 21, 21 of the joint cover 2 are butted together with one end of the center member 21 in contact with the other center member 21, and the openings 21a, 21a are filled. Furthermore, by press-fitting the joint body 8 shown in FIG. 10, it is possible to align the axial directions of the center members 21, 21, which are cylindrical bodies, and connect the ends thereof. In order to ensure the connection strength between the center members 21, 21 supported in a cantilevered manner approximately in the center of the gap G, the joint body 8 is preferably a member having high cross-sectional performance.

According to the expansion joint 1 configured in this manner, when the frames A and B are relatively displaced due to an earthquake or the like and the gap G expands, contracts, or shifts, the joint cover 2 elastically deforms following the displacement. Alternatively, it is possible to absorb the displacement by sliding along the support members 3, 3 and form a flat surface from the floor surface AF to the floor surface BF.

FIG. 11 shows when the gap G is narrowed ((A) in the figure) and widened ( FIG. 4(B) shows the expansion and contraction of the cover supporting device 4. FIG.
As shown in the figure, the cover supporting device 4 has an arm member 42 which is rotatably installed on a shaft portion 41 in a direction inclined with respect to the width direction within the gap G. When the base members 6, 6 rotate around the shaft portion 41 and rotate around the shaft portions 43, 43 at both ends thereof, the base members 6, 6 relatively slide along the rail members 7, 7, thereby reducing the gap G. The distance along the width direction of the gap G between the ends of the cover supporting device 4 expands and contracts following the change in width, thereby moving the center member 21 of the joint cover 2 connected to the shaft portion 41 to It is positioned at the center of the displacement width of the gap G at all times.

The support bases 5, 5 are installed at the ends of both skeletons A, B facing the gap G, and both ends of the cover support device 4 are attached to the support surface portions 52, 52 of both support bases 5, 5 to form the cover support device. 4 is supported within the gap G, the attachment position of the end portion of the cover support device 4 on the support surface portion 52, that is, the attachment of the rail member 7, is shifted along the width direction of the gap G. Even if the width of the gap G varies greatly due to joint error, it is possible to properly secure the specified movable amount of the joint cover 2 and the cover support device 4 .

FIG. 12 shows an aspect of the expansion joint 1 installed in the gap G between the wall and floor of the building.
1A shows a case where the width (Wga) of the gap G is as designed. In this case, the joint cover 2 and the cover support device 4 are installed with their respective centers arranged at the center of the gap G. FIG.
On the other hand, when the width of the gap G is narrower than the design specification (Wgb<Wgb) as shown in FIG. By adjusting the mounting position of the end portion, in this case, setting the mounting position to a position biased toward the skeleton A side, mounting the rail members 7, 7, and connecting the end portion of the cover support device 4 thereto, An appropriate movable amount of the joint cover 2 and the cover support device 4 is ensured.

In the illustrated expansion joint 1, the joint cover 2 is formed by arranging the cover members 22 made of an elastic material and having stretchability in parallel with the center member 21 interposed therebetween. is configured to cover
In this way, by forming the joint cover 2 by arranging a plurality of stretchable cover materials 22 having a small product width in parallel with respect to the width dimension of the gap G, it is easy to follow the relative displacement of the skeletons A and B. It is possible to configure the mechanism.

13 and 14, the seam cover is constructed of a cover material formed elastically and elastically, and is installed at the corner of the wall surface of the building where it meets the floor surface. 4 shows an embodiment of an expansion joint;

FIG. 13 shows a mode in which the seam cover 2A is composed of one cover material formed with a width that can cover the gap, and this is installed between the skeletons A and B on both sides of the gap. As shown in FIG. 1A, the joint covers 2A, 2A cover the L-shaped gap along the corner, and the ends of both joint covers 2A, 2A are brought into contact with each other at the center of the corner. be.
In the aspect in which the joint cover 2A is composed of one cover material in this way, when relative displacement occurs between the skeletons A and B due to the occurrence of an earthquake, etc., when the gap is narrowed, they overlap. When the portion OV is displaced in the spreading direction, a missing portion CR is formed, but the overlapping portion OV and the missing portion CR are relatively large.

On the other hand, FIG. 14 shows a joint cover 2 composed of two cover members 22, 22 arranged in parallel with a center member 21 interposed therebetween, as in the case of the above-described embodiment. A mode in which the wire is installed between A and B is shown.
In this embodiment, the joint cover 2 is formed by arranging two cover materials 22 whose product width is 1/2 that of the cover material shown in FIG. The size of the overlapping portion OV when the gap formed in the gap is narrowed and the size of the missing portion CR when the gap is widened are each about half the size of the case shown in FIG. .
In this way, the mode shown in FIG. 14 is an overlapping portion that occurs when the joint covers 2, 2 interfere or separate at the center of the corner portion due to the relative displacement of the skeletons A, B due to an earthquake or the like. Since the size of the missing part is reduced to about 1/2, the joint cover 2 can be easily moved, and the expansion joint 1 can follow the movement.

The configuration of the expansion joint 1, the configuration of the joint cover 2, the support member 3, and the cover support device 4 illustrated in the above embodiment are examples, and the present invention is not limited to the illustrated configuration, and may be configured in other appropriate configurations. It is possible.

In the embodiment illustrated above, the center material 21 of the joint cover 2 is a hollow cylindrical body having an opening 21a inside. The material 21 may be used to construct the seam cover 2 . In this case, the center members 21 and 21 are connected to each other using a joint body having a shape different from that of the joint body 8 .
The center material 21 has the function of arranging and connecting the cover materials 2, 2 on both sides thereof, but does not necessarily have to be arranged in the center of the joint cover 2. As shown in FIG. When connecting cover materials having different widths, the joint cover 2 is arranged closer to one of both side portions. In addition, when the joint cover 2 is formed by arranging three or more cover materials, two or more center members 21 are arranged in parallel within the joint cover 2 to connect the cover materials.
Further, in the illustrated embodiment, the seam cover 2 is formed using the stretchable cover material 22 made of an elastic material. may The present invention can also be applied to an expansion joint 1 in which such a joint cover 2 is supported by a cover support device 4 .

In the illustrated embodiment, the support bases 5, 5 are attached to both ends of the skeletons A, B facing each other across the gap G, and the support surfaces 52, 52 projecting into the gap G are covered. It is provided so that the connection position of the end of the support device 4 can be adjusted along the width direction of the gap. may be provided so that the connection position of the end of the cover support device 4 can be adjusted.
For example, as shown in FIG. 17, of the skeletons A and B facing the gap G, the support base 5 is attached only to the skeleton A, and the end of the cover support device 4 on the skeleton B side is attached via the support material 10. The cover support device 4 is connected to the frame B and slidably supported along the support member 10 along the length direction of the gap G, and the end portion of the cover support device 4 on the side of the frame A is inside the support surface portion 52 of the support base. The cover support device 4 may be supported in the gap G after adjusting the connection position in . The end of the cover support device 4 may be directly connected to the end of the skeleton B facing the gap G without the support member 10 intervening. A recessed groove 10a to which a water stoppage auxiliary sheet 9 is attached is formed at the end on the gap G side of the support member 10 shown in the figure, and the water stoppage between the support base 5 attached to the frame A is formed. An auxiliary seat 9 can be installed.
The present invention can be applied not only to newly installed expansion joints but also to repair of existing expansion joints.

Reference Signs List 1 expansion joint 2 joint cover 21 center member 22 cover member 23 cover member 3 support member 4 cover support device 41, 43 shaft portion 42 center member 5 support base 51 mounting surface portion 52 support surface portion , 6 base material, 7 rail material, 8 joint body, 9 water stop auxiliary sheet, 10 support material, F fixing member, A, B frame, G gap, AF, BF floor surface

Claims (7)

A joint cover that covers the gap between the skeletons, and a cover supporting device that is provided in the gap and supports the joint cover in the gap, the distance along the width direction of the gap at both ends thereof expanding and contracting. a cover support device provided so as to be able to
A support base having a support surface protruding into the gap is attached to each of the ends facing the gap of the two skeletons,
A rail material having a groove is mounted on the support surface of the support base with the opening of the groove facing upward, and the leg provided at the end of the cover support device extends along the rail material. An expansion joint having a configuration connected so as to be slidably displaceable in the longitudinal direction ,
The support surface portion of the support base protrudes horizontally within the gap, and the width of the protrusion of the support surface portion constitutes an adjustment allowance (AJ) for the mounting position of the rail material, and the mounting position of the rail material on the support surface portion is determined by the gap width. By adjusting along the direction, it is possible to adjust the distance between the connecting position of the end of the cover support device on the support surface and the end of the frame to which the support base is attached. An expansion joint characterized by being configured as Instead of attaching a support base having a support surface protruding into the gap to the ends of both skeletons facing the gap, the support base is attached only to one skeleton end,
A cover support device has one end connected to the other skeleton end facing the gap, either directly or via a support, and the other end mounted on the support surface of the support base. 2. An expansion joint according to claim 1, wherein the expansion joint is configured to be connected to the rail material and installed in the gap. Between the support bases attached to the ends of both skeletons, or between the support base and the support material when the support base is attached to one skeleton and the support material is attached to the other skeleton. 3. Expansion joint according to claim 1 or 2, characterized in that it has a configuration. 4. The expansion according to any one of claims 1 to 3, wherein the cover support device has a shaft portion at least in the center between both ends thereof, and the shaft portion is pivotally supported by the joint cover. Joint. The joint cover has a center member extending in the lengthwise direction of the gap, and on both sides of the center member, cover members formed by using elastic material so as to be able to expand and contract along the width direction of the gap are connected respectively. 5. The expansion joint according to any one of claims 1 to 4, characterized in that it is constructed as a. The ends of the other center material are brought into contact with one end of the center material so that the center materials are arranged side by side, and the abutted ends are connected to the joint body so that the center materials have a gap length. 6. The expansion joint according to claim 5, wherein the joint cover is constructed by joining along the width direction. 7. The expansion joint according to any one of claims 1 to 6, which is installed in a gap arranged on the floor surface of a building.

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