JP7045731B1 - Floor joint device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor joint device capable of absorbing a shaking motion due to an earthquake without being damaged even in a joint portion having a corner portion near a boundary with another person's site or a public road.
SOLUTION: This is a floor joint device 1 for closing a joint portion 2 having a corner portion, and a first joint plate support portion 5 provided on one skeleton 3 and a second joint plate support portion 5 provided on the other skeleton 4. The joint plate support portion 6 is composed of a joint plate 7 that closes the joint portion 2, and a joint plate support mechanism 8 that supports the bottom surface of the joint plate 7. The joint plate support mechanism 8 includes a support member 10 and a support plate 9. A support member positioning means 11 that positions the support plate 9 at a predetermined position, a corner support plate 12 that is slidably provided on the support plate 9 and projects so as to close the corners of the joint portion 2, and a normal time. The corner support plate 12 is provided with the corner support plate positioning means 13 for positioning the corner support plate 12 at the corners of the joint portion 2.
[Selection diagram] Fig. 1

Description

The present invention relates to a floor joint device that closes joints between skeletons provided via joints.

Conventionally, as a floor joint device that closes a joint formed near a boundary with another person's site or a public road, "it is provided near the boundary line through the outer wall surface and joint of a building such as a seismic isolation building." A support recess that is formed on the upper surface of the joint side of the wall and has an inclined surface on the anti-joint side (boundary line side), and one end is supported by this support recess and the other end is of the building. The upper part is pivotally supported at the support joint plate located near the outer wall surface and the portion near the other end of the support joint plate, and the lower part is pivotally supported at the lower position on the joint side of the wall as described above. A support joint plate support that supports one end of the support joint plate so that it can move to the upper surface of the wall from the support recess without falling off from the support recess, and a support joint plate that is slidably supported by the support joint plate. One end is located at substantially the same position as one end of the support joint plate, and the other end is a joint plate attached to the outer wall surface of the building so as to be vertically movable. "Device" is known (Patent Document 1).

However, in such a floor joint device, when the joint portion extends only in the left-right direction or the front-rear direction, the joint portion can be closed without any problem, but for example, an L-shape extending in the front-rear direction and the left-right direction. In joints having substantially orthogonal corners such as joints, there is a drawback that the support joint plate or the like interferes with the skeleton or the like during an earthquake and is damaged.

Japanese Patent No. 4499033

In view of the above-mentioned conventional drawbacks, the present invention is a floor joint that can absorb the shaking motion caused by an earthquake near the boundary with another person's site, public road, etc., and even if the joint has a corner, it is not damaged. The purpose is to provide the device.

The above and other objects and novel features of the invention will become more fully apparent when the following description is read in light of the accompanying drawings.
However, the drawings are for illustration purposes only and do not limit the technical scope of the present invention.

In order to achieve the above object, the floor joint device according to claim 1 of the present invention is a floor joint device that closes a joint portion having a corner formed between one and the other skeleton, and is described above. A first joint plate support portion provided on one skeleton and a second joint plate support portion provided on the other skeleton so as to face the first joint plate support portion via the joint portion. And, one end side is supported by the first joint plate support portion, the other end side is supported by the second joint plate support portion, and the joint plate that closes the joint portion and the joint plate. It is composed of a joint plate support mechanism that supports the bottom surface, and the joint plate support mechanism is provided with a lower end portion rotatably attached to the wall surface of the other skeleton and a support plate rotatably provided at the upper end portion thereof. The support member, one end of which is rotatably attached to the support member, and the other end of which is supported by the second joint plate support portion, and the support plate are positioned at predetermined positions. A support member positioning means for causing the joint member to be slidably provided, a corner support plate slidably provided on the support plate and protruding so as to close the corner portion of the joint portion, and the corner portion support plate at the corner portion of the joint portion in a normal state. It is characterized by comprising a corner support plate positioning means to be positioned at.

The support plate of the floor joint device according to claim 2 and each joint end portion of the corner support plate on the corner side of the joint portion have substantially the same shape as the diagonal line of the corner portion of the joint portion in a plan view. It is characterized by being formed in.

The joint plate support mechanism of the floor joint device according to claim 3 is further provided with a corner support plate holding means for holding the protruding end side of the corner support plate so as not to bend downward. And.

The joint plate, the support plate, and the corner support plate of the floor joint device according to claim 4 are characterized by having a through hole capable of ventilating the air in the joint portion.

As is clear from the above description, the following effects can be obtained in the present invention.
(1) In the invention according to claim 1, the joint plate can be supported even in the joint portion having a corner by the support plate and the corner support plate, and the joint plate can be installed without a gap. can.
(2) Further, since the corner support plate is provided so as to be slidable, even if the width of the joint portion changes due to the shaking motion due to the earthquake, the shaking motion can be absorbed without damaging the skeleton or the like.
(3) In the invention according to claim 2, the same effects as those in (1) and (2) above can be obtained, and the joint plate at the corner can be supported more efficiently.
(4) In the invention according to claim 3, the same effects as those in (1) to (3) above can be obtained, and even when a load is applied to the corner support plate, the load is supported. be able to.
(5) In the invention according to claim 4, the same effects as those in (1) to (4) above can be obtained, and the air in the lower part of the joint can be ventilated.

1 to 10 are explanatory views showing a first embodiment of the present invention.
11 to 14 are explanatory views showing a second embodiment of the present invention.
The plan view (normal time) of the floor joint apparatus which shows 1st Embodiment. Sectional drawing along line 2-2 of FIG. Explanatory drawing of the joint part. Explanatory drawing of the state where the joint plate support mechanism is installed. Explanatory drawing of joint plate. Explanatory drawing of support plate and corner support plate. An operation explanatory view from the plan view side in a state where the joints are narrowed by the earthquake. FIG. 7 is a sectional view taken along line 8-8. An operation explanatory view from the plan view side in a state where the joints are widened due to the earthquake. FIG. 9 is a cross-sectional view taken along the line 10-10. The plan view of the floor joint apparatus which shows the 2nd Embodiment. FIG. 11 is a cross-sectional view taken along the line 12-12 of FIG. A perspective explanatory view of the joint plate. Explanatory drawing of support plate and corner support plate.

Hereinafter, the present invention will be described in detail in accordance with the embodiments shown in the drawings for carrying out the present invention.
In the first embodiment for carrying out the present invention shown in FIGS. 1 to 9, 1 is a joint portion having a corner portion 2c formed in the vicinity of a boundary B with a site of another person, a public road, or the like, for example, in a substantially orthogonal state. It is a floor joint device installed between one skeleton 3 and the other skeleton 4 provided through 2 (for example, a corner-shaped joint portion 2). The substantially orthogonal state is not only the angled portion 2c where the joint portions 2 intersect in the orthogonal state (when the angle is 90 degrees), but also the state where the joint portions 2 intersect at an obtuse angle or an acute angle than 90 degrees, and the cornered portions 2c are arcuate (fan-shaped). It also includes the case where it is.
The left-right direction is the left-right direction in FIG. 1 (plan view), the front-back direction is the up-down direction in FIG. 1, and the up-down direction is the up-down direction in FIG.

Further, in the present invention, the skeleton refers to a building in which a joint plate such as a building, a road, a slab, or an elevator shaft can be installed, and the entrance / exit is not only an entrance / exit provided with a door or a door, but also a person, a vehicle, or the like. It also includes passages that can be passed.

In the floor joint device 1 of the present embodiment, for example, as shown in FIGS. 1 and 2, the first joint plate support portion 5 provided on one of the skeletons 3 and the first joint plate support portion 5 are provided. One end side is supported by the second joint plate support portion 6 provided on the other skeleton 4 so as to face each other via the joint portion 2, and the first joint plate support portion 5, and the first portion is supported. The other end side is supported by the joint plate support portion 6 of 2, and is composed of a joint plate 7 that closes the joint portion and a pair of joint plate support mechanisms 8 that support the bottom surface of the joint plate 7.

Further, as shown in FIG. 2, for example, the lower end portion of the pair of joint plate support mechanisms 8 is rotatably attached to the wall surface of the other skeleton 4, and the support plate 9 is rotated at the upper end portion thereof. A bar-shaped support member 10 movably provided, one end of which is rotatably attached to the support member 10, and the other end of which is supported by the second joint plate support portion 6 in a normal state. The support plate 9 in a substantially horizontal state, the support member positioning means 11 for positioning the support plate 9 at a predetermined position, and the support plate 9 are slidably provided so as to close the corners of the joint portion 2. The protruding corner support plate 12, the corner support plate positioning means 13 that normally positions the corner support plate 12 at the corner of the joint portion 2, and the protruding end 12a side of the corner support plate 12 are downward. It is composed of a corner support plate holding means 14 that holds the joints so as not to bend.

In the present embodiment, as shown in FIG. 3, the joint portion 2a in the left-right direction and the joint portion 2b in the front-rear direction intersect in a substantially orthogonal corner shape (L-shape) in a plan view, and have a corner portion 2c in a substantially orthogonal state. It is a joint part 2. As shown in FIG. 4, for example, the joint plate support mechanism 8 is provided in the joint portion 2a in the left-right direction and the joint portion 2b in the front-rear direction, respectively, and the joints in the left-right direction constituting the pair of joint plate support mechanisms 8 respectively. The joint end of the corner support plate 12 located on the side of the joint 2a and the corner support plate 12 located on the side of the joint 2b in the front-rear direction project to the corner 2c side of the joint 2, respectively. In addition, the pair of corner support plates 12 project to close the corners 2c of the joints 2 to support the bottom surface of the joint plates 7 located at the corners, and the joints 2 have become wider due to the earthquake. In this case, the corner portion of the joint portion 2 is closed (see FIGS. 9 and 10).

A first joint plate support portion 5 is formed at the upper end portion of one of the skeletons 3, as shown in FIGS. 2 and 3, for example. The first joint plate support portion 5 is formed in a concave shape extending in the left-right direction and the front-rear direction at the end portion on the joint portion 2 side, and the mounting pin 15 of the joint plate 7 is inserted in the vertical direction. A pin insertion hole 16 is formed. In the present embodiment, the first joint plate support portion 5 is formed on one of the skeletons 3, but for example, a rail or a pin case having a cross-sectional view angle is fixed to the wall surface of the one skeleton 3. The rail may be used as the first joint plate support.

On the other skeleton 4, for example, as shown in FIGS. 2 and 3, the end portion of the other skeleton 4 on the joint portion 2 side faces the first joint plate support portion 5 in the left-right direction and front and back. A concave second joint plate support portion 6 extending in the direction is formed, and the joint portion 2 is formed at the end of the second joint plate support portion 6 on the opposite side to the joint portion 2 due to the earthquake. A riding inclined surface 17 on which the joint plate 7 can ride when narrowed is formed.

One end of the joint plate 7 is supported by the first joint plate support 5, and the other end is directly or indirectly supported by the second joint plate support 6 (via the support plate 9). In this state, a plurality of joint portions 2 are provided in the front-rear direction without any gap.

The joint plate 7 includes a joint plate 7a having a substantially rectangular shape in a plan view and a corner joint plate 7b having a substantially right angle trapezoidal shape in a plan view. The joint portion 2 is closed without a gap.

As shown in FIG. 4, the joint plate 7 is provided on the joint plate main body 18 made of a metal material having a substantially rectangular shape or a substantially right angle trapezoidal shape in a plan view, and on the bottom surfaces of both ends of the joint plate main body 18. It is composed of the mounting pin 15 and a cover plate 20 mounted on the other end side of the joint plate main body 18 via a hinge member 19.

In the present embodiment, the shallow plate-shaped joint plate main body 18 is filled with a filling member 21 such as mortar, and a decorative plate 22 is provided on the upper surface of the filling member 21. By the way, the joint plate 7 may be formed with a through hole (not shown) that can penetrate the joint plate main body 18, the filling member 21, and the decorative plate 22 to ventilate the air inside the joint portion 2.

As shown in FIGS. 2 and 4, the joint plate support mechanism 8 positions the support member 10, the support plate 9 rotatably provided at the upper end of the support member 10, and the support plate 9 at predetermined positions. It is composed of a positioning means 11 for making the corner support plate 9, a corner support plate 12 slidably attached to the support plate 9, a corner support plate positioning means 13, and a corner support plate holding means 14. It is provided in the joint portion 2a in the left-right direction and the joint portion 2b in the front-rear direction, respectively.

The support member 10 is a bar-shaped member in the present embodiment, and a plurality of lower end portions thereof are rotatably attached to the side wall surface of the joint portion 2 of the other skeleton 4, and a member such as a hinge is attached to the upper end portion thereof. The support plate 9 is rotatably attached to the support plate 9.

As shown in FIG. 6, the support plate 9 is a plate-shaped or box-shaped (sheath-shaped) member having a right-angled trapezoidal shape in a plan view, and the support member 10 is rotated at one end thereof (the end on one skeleton 3 side). It is movably connected and the other end is supported by a second joint plate support portion 6.

In the present embodiment, the support plate 9 is formed in a box shape in which the end portion 9a side is open, and the inside of the box is the mounting portion 23. The corner support plate 12 is attached to the attachment portion 23 so as to be freely visible (sliding) in the longitudinal direction of the joint portion 2 (in the case of the joint portion 2a extending in the left-right direction, the left-right direction). It is desirable that a sliding material, a bearing, or the like is provided on the bottom surface of the mounting portion 23 or the corner support plate 12 in order to facilitate the sliding movement of the corner support plate 12 (not shown).

The end portion 9a on the corner side of the joint portion 2 of the support plate 9 substantially overlaps with the line connecting the vertices P of the corner portion 2c of the joint portion 2 in a plan view (substantially the same as the diagonal line of the corner portion 2c of the joint portion 2). It is formed on the hypotenuse of the angle (which becomes the shape), and in the present embodiment, it is formed so as to be the hypotenuse of an angle of, for example, approximately 45 degrees.

Further, the end portion 9a is provided so as to be separated from the wall surface on the joint portion 2 side of one of the skeletons 3 by the maximum swaying motion width due to an earthquake at least equal to or more than that in a normal state. In this way, the same dimension as the maximum width assumed to be shaken by an earthquake from the wall surface 3a on the joint portion 2 side of one skeleton 3 (the wall surface 3a of one skeleton 3 at the corner of the joint portion 2 facing the end portion 9a). By separating them as described above, it is possible to reliably prevent the support plate 9 from colliding with the wall surface 3a facing the end portion 9a.

The corner side end portion 12a of the corner portion support plate 12 also substantially overlaps with the line connecting the vertices P of the corner portion 2c of the joint portion 2 in a plan view (the corner portion of the joint portion 2) as well as the end portion of the support plate 9. It is formed on the hypotenuse of an angle (which has substantially the same shape as the diagonal line of 2c), and in the present embodiment, it is formed so as to have an angle of approximately 45 degrees. The support plate 9 and the corner support plate 12 may also be formed with through holes (not shown) capable of ventilating the air below the joint portion 2.

The corner support plate 12 is always provided by the corner support plate positioning means 13 for positioning the corner support plate at the corner 2c of the joint portion 2 under normal conditions (state in which an earthquake such as FIG. 1 does not occur). It is urged so as to project toward the corner portion 2c of the joint portion 2, and is provided at the protruding end portion 12a of the corner portion support plate 12 provided at the joint portion 2a in the left-right direction and at the joint portion 2b in the front-rear direction. The end portion 12a of the corner support plate 12 is provided so as to be substantially in contact with the corner portion of the joint portion 2 and to close the corner portion of the joint portion 2 in which the support plate 9 does not exist.

In the present embodiment, the corner support plate positioning means 13 is a coil spring 13 provided in the mounting portion 23, and the corner support plate 12 is constantly urged toward the corner side of the joint portion 2. The corner support plate positioning means 13 may be, for example, a pull spring that pulls the corner support plate 12 toward the corners of the joint portion 2, or the corner portions provided in the joint portions 2a in the left-right direction. The end portion 12a of the support plate 12 and the end portion 12a of the corner support plate 12 provided in the joint portion 2b in the front-rear direction are connected so as to be vertically movable, and the joint portion is utilized by the return force of the positioning means 11 or the like. The end portion 12a may be located at the corner portion of the portion 2, and any positioning means may be used.

The corner support plate 12 has a size that is more than twice the width of the shaking caused by the earthquake (the corner support plate 12 provided in the joint portion 2a in the left-right direction is the corner support plate 12 provided in the joint portion 2a in the left-right direction and the front-back direction). Has dimensions in the front-back direction), and even if the joint portion 2 becomes wider due to an earthquake, it does not fall off from the mounting portion 23 and supports the corner portion provided in the joint portion 2a in the left-right direction. The contact state between the end portion 12a of the plate 12 and the end portion 12a of the corner support plate 12 provided at the joint portion 2b in the front-rear direction can be maintained.

The corner joint plate 7b is in a state of being supported by the corner support plate 12 alone or by the corner support plate 12 and the support plate 9.

In the present embodiment, the support plate 9 and the corner support plate 12 are in a state of covering substantially the entire area except for a part on one skeleton side of the joint portion 2 in a normal state, and at least the joint portion 2 is in a state of being affected by an earthquake. Has a length sufficient to support the joint plate 7 so as not to fall off to the joint portion 2 when the joint plate 7 becomes wider.

In the present embodiment, the positioning means 11 of the joint plate support mechanism 8 has a wire 24 that restricts the movement of the support member 10 so as not to rotate more than a certain amount, and a direction in which the support member 10 is separated from the wall surface 4a of the other skeleton 4. It is composed of an urging tool 25 for urging the joint. By such a positioning means 11, the support plate 9 automatically returns to the normal position (position shown in FIGS. 1 and 2) when the shaking motion due to the earthquake has subsided.

The urging tool 25 is composed of a dogleg-shaped link member 26 and a pull spring 27 that is connected to the link member 26 and pulls the link member 26 in the opening direction.
By the way, if the bottom surface of the protruding end portion 12a of the above-mentioned corner support plate 12 is not supported, the corner support plate 12 may bend when a weight is applied. Therefore, it is desirable to provide the corner support plate holding means 14.

The corner support plate holding means 14 has a link mechanism 28 provided between one skeleton 3 and the other skeleton 4 so as to be substantially parallel to the protruding end portion 12a of the corner support plate 12, and the link mechanism. It is provided in 28 and is composed of a support portion 29 that supports the bottom surface in the vicinity of the protruding end portion 12a of the corner support plate 12.

The link mechanism 28 is connected so that the upper portion is substantially horizontal in a substantially inverted triangular shape or a substantially trapezoidal shape in front view so that the upper portion does not move in the vertical direction even when expanded and contracted, and both ends of the upper portion are connected. It is rotatably attached to the wall surfaces of one skeleton 3 and the other skeleton 4 in the front-rear direction and the left-right direction, respectively, and a plate-shaped support portion 29 is fixed to a substantially central portion of the upper portion thereof. The support portion 29 comes into contact with the bottom surface of the protruding end portion 12a of the corner portion support plate 12 to support the corner portion support plate 12.

If it is not expected that a weight will be applied to the protruding end portion 12a of the corner support plate 12, it is not always necessary to provide the corner support plate holding means 14.

When the skeletons 3 and 4 sway in the left-right direction due to the earthquake and the joint portion 2 becomes narrower, the joint plate 7 rides on the riding inclined surface 17 of the second joint plate support portion 6 as shown in FIGS. 7 and 8, and is substantially vertical. The support plate 9 of the joint plate support mechanism 8 is also lifted substantially vertically upward by the riding inclined surface 17 while sliding upward on the floor surface of the other skeleton 4. Slide up and absorb the shaking caused by the earthquake.

At this time, the lower end of the support member 10 rotates around the wall surface 4a of the other skeleton as a fulcrum, and the support plate 9 attached to the upper end is also substantially parallel to the floor surface of the other skeleton 4. It rotates around the upper end of the support member 10 as a fulcrum.

Further, the corner support plate 12 is pressed against the wall surface 3a of one of the skeletons 3 and the corner support plate 12 that abuts against the corner support plate 12, enters the support plate 9 side, and absorbs the shaking motion due to the earthquake without being damaged. The corner support plate holding means 14 rotates or expands and contracts according to the swaying motion of one skeleton 3 and the other skeleton 4, and absorbs the swaying motion.

When the shaking motion due to the earthquake is completed, the joint plate 7 returns to the normal position, and the support plate 9, the support member 10, and the corner support plate 12 are in the normal positions by the positioning means 11 and the corner support plate positioning means 13. Return to. At this time, the wire 24 limits the movement of the support member 10 so that the support member 10 does not rotate too much toward one of the skeletons.

When the skeletons 3 and 4 sway in the left-right direction due to an earthquake and the joint portion 2 becomes wider, as shown in FIGS. 9 and 10, the support member 10 is restricted from moving toward one skeleton 3 side by the wire 24, and the other skeleton is restricted. It sways in synchronization with 4. At this time, the joint plate 7 is not directly supported by the second joint plate support portion 6, but since the bottom surface of the joint plate 7 is supported by the support plate 9, the joint plate 7 falls to the joint portion 2. There is no.

Further, the corner joint plate 7b is supported by the support plate 9 and the corner support plate 12, and as shown in FIG. 9, the support plate 9 and the corner support plate 12 close the corner portion 2c of the joint portion 2. It is possible to absorb the shaking motion caused by the earthquake without creating a gap in the joint portion 2.

At this time, since the protruding end portion 12a of the corner portion support plate 12 is held by the corner portion support plate holding means 14, even if a person or the like rides on the protruding end portion 12a of the corner portion support plate 12 and a load is applied. There is no bending, and it is possible to reliably prevent a person or the like from falling to the lower part of the joint portion 2.

[Different forms for carrying out the invention]
Next, different embodiments for carrying out the present invention shown in FIGS. 11 to 14 will be described. In the description of these different embodiments for carrying out the present invention, the same components as those of the first embodiment for carrying out the present invention are designated by the same reference numerals and overlapping description will be omitted.

The second embodiment for carrying out the present invention shown in FIGS. 11 to 14 is mainly different from the first embodiment for carrying out the present invention so as to have a substantially square grid shape in a plan view. A joint plate 7A using a joint plate main body 18A having a through hole 30 formed, and a rail extending in the longitudinal direction near both sides of the bottom surface while forming the through hole 30 so as to form a substantially square grid in a plan view. A joint plate floor joint device using such a joint plate 7A or a joint plate support mechanism 8A in that a joint plate support mechanism 8A using a support plate 9A having a shaped mounting portion 23A and a corner support plate 12A is used. Even with 1A, the same action and effect as in the first embodiment for carrying out the present invention can be obtained.

The through hole 30 may be formed only in a part, for example, a portion located above the joint portion 2 in a normal state.

In the present embodiment, the joint plate main body 18A is formed with a large number of through holes 30 so that substantially the entire joint plate main body 18A has a substantially lattice shape in a plan view or a lattice shape having a honeycomb structure. In the present embodiment, the through hole 30 is formed by fixing a metal plate combined so as to form a planar grid on the inside of the frame-shaped member.

By using the through holes 30 having a substantially lattice shape or a honeycomb structure in a plan view as described above, it is possible to secure the air permeability without lowering the strength as compared with the joint plate 7 filled with mortar or the like.

As shown in FIG. 4, the support plate 9A of the joint plate support mechanism 8A is also formed in a substantially lattice shape in a plan view or a lattice shape having a honeycomb structure, similarly to the joint plate main body 18A.
By forming such a through hole 30, the air inside the joint portion 2 can be naturally ventilated.

In the embodiment of the present invention, a support plate having a substantially right-angled trapezoidal shape in a plan view, a corner support plate, and the like are used, but a square support plate and a corner support plate may also be used. In such a case, one corner support plate is brought into contact with the wall surface of one skeleton, and the other corner support plate is brought into contact with the side surface of one corner support plate to support the corner joint plate.

The present invention is used in the industry of manufacturing floor joint devices.

1, 1A: Floor joint device, 2: Joint part,
3: One skeleton, 4: The other skeleton,
5: 1st joint plate support, 6: 2nd joint plate support,
7,7A: Joint plate, 8,8A: Joint plate support mechanism,
9, 9A: Support plate, 10: Support member,
11: Support member positioning means, 12, 12A: Corner support plate,
13: Corner support plate positioning means, 14: Corner support plate holding means,
15: Mounting pin, 16: Pin insertion hole,
17: Riding slope, 18, 18A: Joint plate body,
19: Hinge member, 20: Cover plate,
21: Filling member, 22: Decorative board,
23, 23A: Mounting part, 24: Wire,
25: Energizer, 26: Link member,
27: Pull spring, 28: Link mechanism,
29: Support part, 30: Through hole,
B: boundary, P: vertex.

Claims (4)

A floor joint device for closing a joint portion having a corner formed between one and the other skeleton, the first joint plate support portion provided on the one skeleton and the first joint plate support. One end side is supported by the second joint plate support portion provided on the other skeleton so as to face the joint portion via the joint portion, and the first joint plate support portion, and the second joint plate support portion is supported. The other end side is supported by the joint plate support portion, and the joint plate is composed of a joint plate that closes the joint portion and a joint plate support mechanism that supports the bottom surface of the joint plate.
The joint plate support mechanism has a support member whose lower end is rotatably attached to the wall surface of the other skeleton and whose upper end is rotatably provided with a support plate, and one end of the support member. The support plate is rotatably attached and the other end is supported by the second joint plate support portion, a support member positioning means for positioning the support plate in a predetermined position, and a slideable support plate. A floor comprising a corner support plate that is provided in the joint portion and projects so as to close the corner portion of the joint portion, and a corner support plate positioning means that normally positions the corner portion support plate at the corner portion of the joint portion. Joint device. Each of the support plate and each joint end portion of the corner support plate on the corner side of the joint portion is formed in substantially the same shape as the diagonal line of the corner portion of the joint portion in a plan view. The floor joint device according to claim 1. One of claims 1 or 2, wherein the joint plate support mechanism further includes a corner support plate holding means for holding the corner support plate so that the protruding end side does not bend downward. Floor joint device described in Crab. The floor joint device according to any one of claims 1 to 3, wherein the joint plate, the support plate, and the corner support plate have through holes capable of ventilating the air in the joint portion.

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