JP2019196587A - Floor cover material of expansion joint, expansion joint for floor and construction method thereof - Google Patents

Abstract

To provide a floor cover material formed of an elastic material of an expansion joint for floor set on the floor of a building, directly attachable to a clearance without using a metallic substrate.SOLUTION: A floor cover material having a covering face part 21 covering a clearance formed on a floor face and connection parts 22, 22 provided at both ends of the covering face part 21, is belt-likely formed using a material having rubber elasticity. A recessed part 23 recessed downward roughly in a reversed V-shape is provided at a center of the covering face part 21, and vertically long hollow parts 24, 24 are provided on both sides of the recessed part 23, resulting in such a cross sectional shape. Vertical width (T) of the hollow parts 24, 24 is formed to be roughly twice of depth (D) (T≒2×D) of the recessed part 23.SELECTED DRAWING: Figure 3

Description

  The present invention is a component of an expansion joint provided in a structure, and is integrated with a floor surface provided on the upper surface of the housing so as to cover a gap provided between the housings (hereinafter also referred to as “clearance”). The present invention relates to a floor cover material that forms a floor surface and a structure of a floor expansion joint using the floor cover material.

  Large buildings are built by dividing the building into multiple enclosures and providing gaps between the enclosures to avoid the effects of load on the temperature changes of the enclosure and earthquakes. An expansion joint is installed so that the housings on both sides of the housing are connected to each other even if the housings are displaced in different directions.

Conventionally, cover materials for construction expansion joints were generally made of metal, but the movable structure is complicated and there are many components, requiring time and labor for construction, making it difficult to handle complicated clearance joints, etc. The problem was pointed out. In addition, metal cover materials are heavy, and in the case of ceiling and wall expansion joints, if the cover material is removed or dropped, it will be injured by residents or pedestrians as it absorbs fluctuations in the housing. It was pointed out that there is a risk of triggering.
Therefore, after the previous earthquake disaster, instead of a metal cover material, a cover material made of a synthetic resin material or a rubber material having good workability and light weight (hereinafter also referred to as “resin cover material”). The aspect of the expansion joint to be employed is increasing (see, for example, Patent Document 1).

However, because of the softness of the resin cover material, it is a general-purpose material for floor cover materials that are constantly loaded on the surface when walking or using a trolley, that is, floor joint materials for expansion joints for floors. The current situation is that it is not adopted.
A few examples of adoption are floor expansion joints that are installed to absorb thermal expansion and contraction of the platform, which is an outdoor structure, displacement of the foundation due to an earthquake, and fixed subsidence of the foundation. There is a mode in which a resin cover material is installed along a clearance provided in the case (see, for example, Patent Document 2).

JP 2007-9449 A JP 2008-38479 A

As will be described later, a resin floor cover material used for an expansion joint for floors is required to have high strength and be difficult to bend, and to be difficult to be stepped when movable.
In order to ensure the flexural strength of the floor covering material, it has been common practice to place a metal plate on the base of the floor covering material. In the expansion joint of the platform, a metal plate is also installed inside the clearance. The bottom of the resin cover material is supported on the upper surface of the metal plate.

However, the mode of supporting the resin cover material on the upper surface of the metal plate has the following problems.
That is, when the housings on both sides of the clearance are displaced toward each other, the clearance is narrowed by a large movable amount, and when the resin cover material is contracted in the width direction, the surface rises to form a convex step. There is a risk of causing troubles in walking. In addition, since the metal plate bears the load when the resin cover material contracts and extends, the amount of movement of the resin cover material depends on the size of the metal plate, ensuring a large amount of movement. I can't.

  Also, since the expansion joint of the platform has a long clearance, when installing a plurality of resin cover materials together, simply joining the end portions of the resin cover materials together When the housing is displaced along the longitudinal direction of the clearance and a load in the displacement direction is applied to the resin cover material, the ends of the resin cover material collide at the seam and a step is formed or damaged. Or the resin cover material may be removed.

  In view of the above-described problems of the prior art, the present invention directly forms a clearance without using a base metal plate when forming a floor cover material of a floor expansion joint provided on a floor of a building with an elastic material. The challenge is to make load-bearing performance good so that it can be attached, to make it possible to follow large clearances and movable amounts, and to make it difficult to make convex steps that hinder walking. . Moreover, this invention makes it a subject to make maintenance work favorable and to perform the construction of an expansion joint easily.

When using a resin cover material for the floor cover material of an expansion joint for floors, it is essential to study the following technical issues.
That is, first, strength.
Be able to walk and pass without causing a large deflection to the load on the top surface when walking or passing a carriage.
Secondly movable.
Movablely follow the displacement in the gap X direction (gap width direction), gap Y direction (gap length direction), and gap Z direction (vertical direction) of the casing with the gap interposed therebetween. In addition, the movable amount required for the floor, for example, the clearance X direction and the gap Y direction are about 1/4 to 1/2 with respect to the clearance, and the movable amount is about 1/5 to 1/3 in the gap Z direction. thing.
Third is the step.
There should be no stepping that would cause people to crawl on the upper surface during normal operation, and no stepping that would protrude upwards even during or after movement.
Fourth, construction and maintainability.
Installation and removal of the floor cover material is easy, and the expansion joint can be constructed without any hassle.

  In response to such technical problems, in the present invention, the floor cover material is formed based on the following specifications and conditions, so that the floor cover material made of an elastic material can be used for a building floor expansion joint for general purposes. I was able to.

First, regarding strength, while ensuring a cross-sectional performance that does not hinder general load bearing performance due to walking of a person or traveling of a carriage, the floor cover material is reduced in weight and in the gap X direction and the gap Z direction. In order to give the movable follow-up performance, the floor cover material is provided with a concave portion recessed downward in the center of its upper surface, and provided with a shape in which large hollow sections are arranged in the vertical direction on both sides of this concave portion, and elastic The load resistance is guaranteed only with the material having
The concave surface portion reduces the opening width of the upper portion facing the floor so that a pedestrian does not scoop or stab the tip of a stiletto or umbrella, and the opening width inside the concave surface portion is larger than the opening width of the upper portion. The cross-sectional shape becomes large, that is, the cross-sectional shape is recessed in a substantially V-shape downward, so that the floor cover material tends to collapse to the clearance side when the floor cover material contracts as the housing is displaced in the direction of narrowing the clearance. Thus, a convex step is not formed on the upper surface.

As for the movable, as described above, the floor cover material is not dependent on the elongation of the molding material itself, by providing the floor cover material in a cross-sectional shape in which a concave surface portion is arranged at the center of the upper surface, and vertically long hollow portions are arranged on both sides thereof. As the cross-section of the cover material is deformed, it is movable, that is, the clearance is narrowed, the concave part and both hollow parts are crushed, and the floor cover material is contracted. Contrary to the above, the concave surface portion and both hollow portions widen the respective opening widths, and the floor cover material extends to satisfy the necessary movable amount.
The movement in the gap X direction ensures a movable amount of about 1/4 to 1/2 with respect to the clearance, so that the formation depth (D) of the concave surface portion and the vertical length (T) of both hollow portions. ) At a predetermined dimensional ratio (see FIG. 3), it is possible to cope with the fluctuation amount required for the expansion joint provided on the floor of the building.
The movement in the gap Y direction is slidably attached to the support part attached to the structure facing the clearance by engaging the connection parts on both sides of the floor cover material with the support part. By fixing one of the connecting portions on both sides to the support portion, the movable body can be moved in the same direction corresponding to the displacement in the gap Y direction between the housings sandwiching the clearance.
Further, the movement in the gap Z direction allows the floor cover material to move following the displacement in the same direction between the enclosures by not providing a metal plate as a base, and the engagement depth of the connection portion with respect to the support portion. By ensuring sufficiently, the connecting portion on the side that is slidably attached to the supporting portion when moved is prevented from being removed.

  Here, the engagement depth to the support portion attached to the structure of the connecting portion of the floor cover material is such that if the engagement portion is too deep (too long), the resistance in the gap Y direction increases. The workability also deteriorates and the weight of the entire device also increases. On the other hand, if it is too shallow (too short), it tends to come off in the direction of the gap Z, and may come off even when a downward load is applied to the floor covering material. As will be described later, one of the connection portions on both sides of the floor cover material is fixed to the support portion. However, if the engagement portion is too shallow, there is a problem that screws cannot be driven into the connection portion and the support portion. From such a standpoint, in order to ensure the mobility in the gap Z direction without impairing the mobility in the gap Y direction, and not to come off in the same direction, and to ensure good workability, The engagement depth (TP) was set to be approximately ½ of the height of the floor cover material, that is, the length (T) in the vertical direction of the two hollow portions (see FIG. 3).

Regarding the level difference, by providing the upper surface of the floor cover material in a shape inclined downward from both sides to the concave surface portion, when the casing is displaced in a direction in which the clearance is narrowed and the floor cover material contracts, the concave surface portion Starting from the formation position, the upper surface of the floor cover material is elastically displaced downward and deformed so as to sink into the clearance, so that a convex step is not formed in the floor cover material when moving.
Further, when the floor cover materials are joined together along the clearance, the end portions of the adjacent floor cover materials collide with the displacement of the casing in the longitudinal direction of the clearance, and the end portions are swung upward to form a step. In order to prevent the occurrence of the occurrence, a connecting member attachment portion is formed between the hollow portions when the floor covering members are connected to each other along the longitudinal direction. When connecting the connecting members to the mounting portions at the ends of the matching floor covering materials and connecting the ends together, aligning the connecting positions in the longitudinal direction of the floor covering materials, and when the displacement of the casing in the longitudinal direction of the clearance occurs, Adjacent floor covering materials were configured to move together.
Also, the end of the housing facing the clearance is cut off with the aluminum mold that forms the support of the floor cover material, and the floor cover material side edge is the same height from this parting with the floor cover material attached to the clearance. By setting it lower than that, it was made so that there was no step on the floor surface that led to the clearance.

  In addition, for maintainability, the support part attached to the end of the housing to which the connecting portion of the floor covering material is connected is fixed to the rail member and the housing, both of which are made of an aluminum mold, and to which the connecting portion of the floor covering material is engaged. After the floor cover material is attached to the rail member, the rail member is fixed to the holder member fixed to the housing so that the floor cover material can move along the rail member. Configured. In addition, fixing the rail member to the holder member is performed by fastening a fastening screw to the holder member from a screw hole of the rail member exposed by rolling up the side end portion of the floor covering material attached to the rail member. I did it. During maintenance, by removing the retaining screw, the floor cover material can be removed from the holder member together with the rail member, so that maintenance work can be performed on the floor. Moreover, the design property of the part which attached the floor cover material was not impaired by covering the said screw hole with the side edge part of a floor cover material.

The concrete form of the floor covering material and the floor expansion joint of the present invention adopting such a solution is as follows.
That is, the floor cover material of the present invention is a cover material that constitutes an expansion joint provided in a structure, and is provided on a covering surface portion that covers a gap disposed on the floor surface of the structure, and on both sides of the covering surface portion. In the floor covering material formed in a band shape having a connection portion connected to the support portion provided at the end portion of the housing facing the gap,
The floor covering material has a concave surface portion that is recessed downward from the covering surface portion, and hollow portions that are respectively provided on both sides of the concave surface portion on the lower side of the covering surface portion, and are formed to be elastically deformable. And
The distance between the lower surface of the frame surface portion surrounding the lower portion of the hollow portion and the upper surface of the covering surface portion (the vertical width of the hollow portion: T) is approximately twice the formation depth (D) of the concave surface portion (T≈2 × D The concave surface portion and the hollow portion are formed with a molding dimension as follows.

According to this, the floor cover material is provided in a cross-sectional shape in which the concave portion recessed downward in the center portion of the covering surface portion and the hollow portions are disposed below the covering surface portions on both sides thereof, so that the gap is narrowed. For the displacement, the concave surface portion and both the hollow portions are crushed and the floor covering material contracts and deforms in the same direction. By widening the opening width and the floor cover material elongating and deforming in the same direction, it is possible to absorb the mutual displacement of the casings across the gap.
And, by forming the formation depth (D) of the concave surface portion and the vertical width (T) of both hollow portions with a dimensional ratio of [T≈2 × D], the load resistance can be increased only with an elastic material. It is possible to secure a large amount of movement when displaced in the direction in which the gap widens, and when the floor cover material moves in the same direction, the load bearing strength is not lowered and the inside of the covering surface portion It is possible to smoothly stretch and deform without causing a step.
Specifically, by forming the floor cover material as described above, the maximum extension amount (Ex) of the floor cover material due to the relative displacement of the housing in the direction in which the width of the gap widens is set as the formation depth of the concave surface portion. It can be set to an amount that is approximately twice the length (D) (Ex≈2 × D).

Further, the floor cover material of the present invention has a concave surface portion that is recessed downward from the covering surface portion, and a hollow portion that is provided on both sides of the concave surface portion below the covering surface portion and is elastically deformable. And is formed in
Between the hollow portions, a connecting member attaching portion is formed between the end portions of the floor cover material when the floor cover materials are connected in the longitudinal direction.

This mounting portion can be formed as an insertion hole for inserting the joint pin between the two hollow portions and below the concave surface portion, and a plurality of floor covering materials are joined to a long gap. When installing together, by connecting the ends of adjacent floor cover materials by inserting joint pins into the respective insertion holes, the floor cover materials are attached with their connection positions in the longitudinal direction aligned, When the casing in the longitudinal direction of the gap is displaced, the adjacent floor cover materials move together, the ends of the adjacent floor cover materials collide with each other, and the end portions are rolled upward to form a step. This can be prevented.
Further, the connecting plate is inserted into the concave surface portion of the floor cover material, spanned between the end portions of the adjacent floor cover materials, the retaining screw is screwed into the connecting plate from above the concave surface portion, and the insertion hole is passed through. The connecting plate may be fastened to the end of the adjacent floor covering material. When inserting the retaining screw, the hollow insertion hole serves as a guide to facilitate the retaining operation.
As a mounting portion in place of the insertion hole, a concave portion provided by being recessed from a lower surface of the concave surface portion to a portion between both hollow portions may be provided, and a joint spanned between the end portions of the floor cover material adjacent to the concave portion. A pin may be inserted or overlapped with the recess to fasten the connecting plate so that the ends of the floor covering material are joined together.

  In the floor covering material having the above-described configuration, the upper surface of the covering surface portion is provided in a shape inclined downward from both sides of the covering surface portion toward the upper end edge of the concave surface portion.

  According to this, when the housing is displaced in the direction in which the gap is narrowed and the floor cover material is contracted and deformed, the covering surface portion that is the upper surface of the floor cover material is elastically deformed downward from the formation position of the concave surface portion, It can be deformed to sink into the gap. As the deformation of the floor cover material is restricted as described above, there is no convex step in the covering surface part due to the deformation, and this hinders walking on the floor surface when the floor cover material is movable or after it is moved. Never come.

  In addition, the concave surface portion has a configuration in which an opening width at an upper end thereof is narrow and a lower opening width is wider than that.

  According to this, since the concave portion is provided with a wider opening width on the lower side than on the upper side thereof, that is, in a downward substantially V-shaped cross-sectional shape, the housing is displaced in the direction of narrowing the gap. Accordingly, when the floor cover material is contracted and deformed, the floor cover material is easily crushed toward the gap, and it is possible to more effectively prevent a step from being formed in the covering surface portion.

  Further, the hollow portions are connected to a partition wall portion having one end connected to a partition wall projecting downward from a central lower portion of the concave surface portion, and the other end is surrounded by a frame surface portion connected to both lower surfaces of the covering surface portion. The upper side is narrow, the lower side is wider, and it is provided in a curved shape that bulges downward.

According to this, the floor covering material can be formed to follow a large gap and a movable amount without depending on the elongation of the molding material itself.
That is, both hollow portions are surrounded by the lower surface of the covering surface portion, the inner surface of the partition wall portion, and the inner surface of the frame surface portion, and when the floor cover material contracts or expands, the hollow portion is the lower surface of the covering surface portion. Deformation of the connecting part between the edge part of the frame surface part and the connecting part between the other end part of the frame surface part and the partition wall part, that is, the part of the node that is the branching part of the surrounding surface and the surface is crushed or hollowed To expand the interior. Deformation of the joints suppresses the decrease in load resistance when the floor covering material is extended, and the width of the concave portion and the hollow portions on both sides thereof are efficiently increased following the increase in the width of the gap. The cover material can be extended.

  An elastic material can be used as the molding material for the floor covering material having the above-described configuration, and a material having rubber elasticity, for example, a rubber material, a synthetic resin material, an elastomer, or the like is preferable, and a thermoplastic elastomer is more preferable. .

In addition, the floor cover material of the present invention has a connecting portion of the floor cover material that is connected to the support portion provided at the end of the housing facing the gap.
A side surface-attached portion that is formed on a side outer surface of the frame surface portion surrounding the hollow portion and covers the side surface of the support portion;
A projecting piece portion that protrudes downward from the lower surface of the covering surface portion outside the side portion of the frame surface portion and engages with the guide recess portion of the support portion;
It is preferable that the cover surface portion is provided in a shape that includes a top surface covering portion that is flat on the outer side in the width direction and covers the top surface of the support portion and covers the top surface of the support portion.

  According to this, the floor covering material covers the side surface adhering portion provided at the connecting portion on the side surface of the supporting portion provided at the end portion of the housing, and the protruding piece portion is engaged with the guide concave portion of the supporting portion. The connection part can be attached by attaching it to the support part, and the depth of covering the side surface of the support part of the side surface attachment part and the engagement (fitting) depth of the protruding piece part to the guide recess are set large. As a result, even if a large load is applied to the floor cover material from above, or the floor cover material moves due to the displacement of the chassis on both sides of the gap along the gap Z direction, the connecting portion can be removed from the support portion. It does not come off, and a large load bearing strength can be ensured. In addition, when the floor cover material is attached to the support portion, the upper surface cover portion covers the upper surface of the support portion on the floor surface by the upper surface adherence portion that extends outward in the width direction along with the covering surface portion of the floor cover material. It can be prevented from being exposed.

  As described above, a load is constantly applied to the surface of the floor due to walking of a person or passing of a carriage. In order to increase the strength against such a load, a floor cover body is constituted by the floor cover material having the above-described configuration and a joint material inserted and installed in the concave surface portion of the floor cover material, and this is installed in the frame gap of the floor surface. Thus, it is preferable to configure the expansion joint. The joint material can be formed using a material having rubber elasticity, like the floor cover material.

Further, the floor expansion joint of the present invention is provided at the end of the floor cover material having the above structure or the floor cover body having the above structure and a housing facing the gap disposed on the floor surface of the structure. Or a cover material support member constituting a support portion to which a connection portion of the floor cover material of the floor cover body is connected.
The cover material support member has a rail member having a guide recess for supporting the connecting portion of the floor cover material and slidably supporting the floor cover material along its longitudinal direction, and is integrally connected to the rail member. A holder member fixed to the end of the object can be provided. Both the rail member and the holder member constituting the cover material supporting member can be formed of, for example, an aluminum mold.

The floor expansion joint having the above-described configuration includes a step of attaching a holder member along an end portion of a housing facing each other with a gap, a step of attaching a rail member to a connection portion of a floor cover material, and the rail member being attached It can be installed by a construction method comprising a step of attaching a floor covering material to the holder member.
Specifically, when a cover material support member is comprised with a rail member and a holder member, it can construct by the following processes, for example.
First, the holder members are respectively fixed along the end portions of both housings facing each other with a gap therebetween. The holder member can be fixed by, for example, driving an anchor bolt into the holder member stacked on the end of the housing.
Next, rail members are respectively attached to the connecting portions on both sides of the floor covering material. The attachment is performed by engaging the connecting portion with the guide concave portion of the rail member. In the floor cover material in which the connecting portion has the side surface-attached portion and the protruding piece portion, the protruding piece portion is inserted into the guide recess portion of the rail member and the outer surface of the guide recess portion is covered and attached to the side cover portion. A rail member can be attached.
At this time, one of the two connecting portions of the floor cover material to which the rail member is attached is fixed to the guide rail by driving a screw into the guide concave portion engaged with the protruding piece portion from the outside. On the other side of the connecting portion, the protruding piece portion and the rail member can be slidably displaced.
Then, the rail members attached to both connecting portions of the floor cover material are respectively connected to the holder members fixed on both sides of the gap, and the floor cover material is bridged and attached between the housings on both sides of the gap. Construction of the expansion joint for the floor is completed.

As described above, the floor covering material of the present invention forms a concave surface portion on the covering surface portion of the floor covering material formed so as to be elastically deformable, and further, a hollow portion below the covering surface portion and on both sides of the concave surface portion. Is provided in the cross-sectional shape in which the floor cover material is deformed so that the concave surface portion and both hollow portions widen the respective opening widths with respect to the displacement spreading along the gap X direction, and the floor cover material is extended. The movable amount is satisfied.
However, depending on the width of the housing gap where the expansion joint is installed, the required amount of movement in the gap X direction is small, and the concave surface portion formed in the covering surface portion expands along the gap X direction by widening the opening width. It may be possible to absorb the displacement. In that case, even if it is not the shape which has arrange | positioned the hollow part on the both sides of the said concave-surface part, the displacement of the gap | interval X direction is carried out by the said concave-surface part being crushed or expanded, and the support part by which the connection part of the floor cover material was provided in the housing edge part It is attached so as to be slidable along the part, so that the displacement in the gap Y direction is similarly prevented so that the connecting part of the floor covering material is displaced to some extent in the vertical direction with respect to the support parts of both housings. It is possible to absorb each displacement in the gap Z direction. However, even in this case, it is necessary to increase the strength against the load that is constantly applied to the surface of the floor.

  Therefore, depending on the required amount of movement in the gap X direction, instead of the above-mentioned floor cover material, it is a cover material that constitutes an expansion joint provided in the structure, and covers the gap arranged on the floor surface of the structure It is formed in a strip shape having a covering surface portion and a connecting portion provided on both sides of the covering surface portion and connected to a support portion provided at an end portion of the housing facing the gap, and downward from the covering surface portion. Using a floor cover material that has a concave surface portion and is elastically deformable using a material having rubber elasticity, the floor cover is combined with a joint material that is inserted and installed in the concave surface portion of the floor cover material. The body may be constructed, and the floor expansion joint may be constructed by bridging the body between the body gaps on the floor surface.

In this case, the floor cover material, like the floor cover material, is directed from both sides of the covering surface portion toward the upper edge of the concave surface portion so that there is no step in the covering surface portion when contracted along the gap X direction. It is preferable that the upper surface of the covering surface portion is provided in a downwardly inclined shape, and the concave surface portion is provided so that the opening width at the upper end is narrow and the opening width at the lower side is wider than that. It is preferable. Of course, according to the required amount of movement, the floor cover material may have a cross-sectional shape below the covering surface portion and provided with hollow portions on both sides of the concave surface portion.
Similarly to the above, the connecting portion of the floor covering material connected to the supporting portion provided at the end of the housing facing the gap is formed on the outer side surface of the floor covering material and covers the side surface of the supporting portion. A side surface covering portion that covers the side surface of the supporting portion, a protruding piece portion that protrudes downward from the lower surface of the covering surface portion outside the side portion and engages with the guide recess portion of the supporting portion, and an outer side in the width direction of the covering surface portion It can be provided in a shape having an upper surface adherence portion that is flat and covers the upper surface of the support portion and covers the upper surface of the support portion.
Similarly to the above, both the floor covering material and the joint material can be molded using a material having rubber elasticity.
Further, as another aspect of the floor expansion joint for joining together the above floor covering materials, a covering surface portion covering the gap disposed on the floor surface of the structure, and provided on both sides of the covering surface portion, the gap is provided in the gap. Using a material having rubber elasticity, having a connection portion connected to a support portion provided at an end portion of the housing facing the housing, and having a concave portion recessed downward from the covering surface portion Using floor covering material that is elastically deformable,
A plurality of floor cover members are installed along the gap, and a connecting plate is inserted between the end portions of the adjacent floor cover members in the concave portions of the two floor cover materials, and is bridged. It is good also as what has fastened with a fixing tool and has the structure by which adjacent floor cover materials were connected.

According to the floor expansion joint of the present invention, when the casings on both sides of the gap are relatively displaced due to an earthquake or the like, and the gap expands or contracts, the displacement in the gap X direction of both casings causes the floor covering material to shrink or The displacement in the gap Y direction can be absorbed by extending and deforming, and the floor cover material can be slid along the support portions attached to the two casings and absorbed. Further, the displacement of the two casings in the gap Z direction can be absorbed by the elastic deformation of the floor covering material following the relative displacement of the both casings in the same direction.
The displacement in the gap X direction and the Z direction is caused by the floor cover material contracting or elongating following the displacement direction, and the displacement in the Y direction is absorbed by the floor cover material being slid along the same direction. Therefore, even if the two casings are relatively displaced in any of the X, Y and Z directions with the gap interposed therebetween, there is no defect portion where the gap is exposed in the floor surface covered with the floor covering material. . Further, since the covering surface portion is provided so as to be deformed downward from the concave surface portion when the floor covering material contracts along the gap X direction, a convex step is not formed in the covering surface portion. Even after the displacement of the skeleton, the floor surface is maintained flat, and there is no risk that the pedestrian will step into the missing part or crawl into the stepped part, thus ensuring the safety of walking. Moreover, if it is the structure which inserted and installed the joint material in the concave-surface part of a floor covering material, it is possible to make the intensity | strength with respect to the load which applies from upper direction higher.

It is sectional drawing which showed schematic structure of one Embodiment of the expansion joint for floors of this invention. It is a principal part external view of the floor covering material of FIG. FIG. 3 is an enlarged end view of the floor covering material of FIG. 2. It is the figure which showed the aspect which splics and installs the floor covering material of FIG. It is a principal part external view of the rail member of FIG. It is a principal part external view of the holder member of FIG. It is an expanded sectional view of the joint member of FIG. It is an external view which shows the principal part of the state which attached the rail member to the connection part of the floor cover material in a cross section. It is the figure which showed the aspect when attaching a rail member to a holder member. It is the figure which showed schematic structure of other embodiment of the floor expansion joint of this invention. It is a principal part external view of the holder cover material of FIG. It is the figure which showed the aspect when attaching the holder cover material of FIG. It is the figure which showed the aspect when removing the holder cover material of FIG. It is the figure which showed schematic structure of embodiment of the floor expansion joint attached to the clearance gap between the joint parts of a floor and an inner wall. FIG. 15 is an enlarged end view of a holder member attached to the mating portion of FIG. 14. It is the figure which showed schematic structure of other embodiment of the floor expansion joint attached to the clearance gap between the joint parts of a floor and an inner wall. It is the figure which showed the other aspect when connecting the edge parts of a floor covering material. FIG. 18 is an end view of a state in which the connecting plate of FIG. 17 is attached to the floor cover material. It is a principal part external view of the joint material attached to the floor cover material connected with the connection board of FIG.

  Preferred embodiments of the present invention will be described with reference to the drawings. The technical idea of the present invention is not limited to the embodiments described below.

  FIG. 1 shows a floor expansion joint according to an embodiment of the present invention. The floor expansion joint 1 includes a floor covering material 2 between a floor surface Fa of the housing A and a floor surface Fb of the housing B facing each other at the same height with a gap G disposed on the floor surface F of the building. It spans and covers the gap G, and the floor Fa and the floor Fb are connected together.

  Specifically, the illustrated floor expansion joint 1 includes a floor cover material 2 that covers the upper surface of the opening of the gap G, supports A and 3 that are provided at the ends of the casing A and the casing B facing the gap G, and will be described later. And a joint material 4 inserted and installed in the concave surface portion 23 of the floor cover material 2, supports both sides of the floor cover material 2 with the support portions 3 and 3, covers the gap G with the floor cover material 2, earthquakes, etc. Thus, when the casings A and B are relatively displaced and the gap G expands or contracts, the floor cover material 2 is elastically deformed or slides along the support portions 3 and 3 following the displacement. The displacement is absorbed, and the floor surface F is configured to be maintained on a flat surface having no defect.

  The floor covering material 2 is a member that is elastically deformable using a material having rubber elasticity, preferably a thermoplastic elastomer, and has a width that covers the gap G as shown in FIGS. It has a surface portion 21 and connecting portions 22, 22 provided on both sides of the covering surface portion 21 and connected to the support portions 3, 3, and is formed in a band shape. Both the covering surface portion 21 and the connecting portions 22 and 22 are formed continuously along the longitudinal direction of the floor covering material 2. In the following description, both sides of the floor cover material 2 or both sides of the covering surface portion 21 mean both side portions of the floor cover material 2 along the short width direction.

  More specifically, a concave surface portion 23 that is recessed downward from the upper surface of the covering surface portion 21 is provided at the center of the covering surface portion 21, and is provided below the covering surface portion 21 and on both sides of the concave surface portion 23. It is provided in a shape in which the hollow portions 24, 24 are arranged.

  The concave surface portion 23 is formed in a cross-sectional shape opened in a substantially V-shaped downward direction in which the opening width at the upper end is narrow and the lower opening width is wider, and the covering surface portion 21 is concave from both sides. The upper surface of the covering surface portion 21 is provided in a shape inclined downward.

  Each of the hollow portions 24 and 24 is surrounded by frame surface portions 26 and 26 having one end connected to a partition wall portion 25 projecting downward from the central lower portion of the concave surface portion 23 and the other end connected to both lower surfaces of the covering surface portion 21. In the cross section, the upper side has a narrow width, the lower side has a wider width, and is provided in a curved shape that bulges downward. Further, as shown in FIG. 3, the hollow portions 24, 24 are spaced from the lower surfaces of the frame surface portions 26, 26 surrounding the lower portions of the hollow portions 24, 24 and the upper surface of the covering surface portion 21 (the vertical width of the hollow portion 23: T) is provided at a molding dimension that is approximately twice the formation depth (D) of the concave surface portion 23 (T≈2 × D).

  The connecting portions 22, 22 provided on both sides of the floor covering material 2 are formed on the outer side surface of the frame surface portion 26 surrounding the hollow portion 24 and cover the side surface of the rail member 31 of the support portion 3, which will be described later. A side surface covering portion 27 that covers the side surface of the member 31; a protruding piece portion 28 that protrudes downward from the lower surface of the covering surface portion 21 outside the side portion of the frame surface portion 26 and engages with the guide recess portion 31d of the rail member 31; The upper surface covering portion 29 is provided so as to cover the upper surface of the rail member 31 while covering the upper surface of the rail member 31 in a state where the floor covering material 2 is attached to the rail member 31. .

  As shown in FIG. 3, the side surface-attached portion 27 formed on the outer side surface of the frame surface portion 26 includes a concave surface 27 a that overlaps a convex surface portion 31 j of the rail member 31 described later and a key-shaped surface portion 31 e of the rail member 31. It has a convex surface 27 b that engages with the lower end, and is provided so as to overlap the entire side surface of the rail member 31 with the protruding piece portion 28 inserted into the guide concave portion 31 d of the rail member 31. The side surface-attached portion 27 and the protrusion piece portion 28 have protrusions 27c, 28a, 28a formed on their surfaces, respectively, and the protrusion 27c of the side surface attachment portion 27 is formed on the side surface of the key-shaped surface portion 31e of the rail member 31. The protrusions 28a, 28a are linearly joined to the inner surface of the guide recess 31d so that the sliding resistance when the floor cover member 2 slides along the rail member 31 is reduced. The length (TP) from the upper surface of the covering surface portion 21 to the lower end of the protrusion piece portion 28 is an abbreviation of the distance (T) from the upper surface of the covering surface portion 21 to the lower surface of the frame surface portion 26 surrounding the lower portion of the hollow portion 24. The projection length of the projection piece 28 is set to be long (TP≈1 / 2T), and the projection piece 28 is inserted into and engaged with the guide recess 31d of the rail member 31. The fitting depth between the protruding piece portion 28 and the guide recessed portion 31 d is increased, so that the protruding piece portion 28 is not easily detached from the guide member 31 even when a downward load is applied in the covering surface portion 21.

  The partition wall portion 25 connected to the lower side of the concave surface portion 23 has an attachment portion for the joint pin 5 that is bridged between the end portions of the floor cover material 2 when the floor cover materials 2 and 2 are connected in the longitudinal direction. An insertion hole 25a is formed. As shown in FIG. 4, when the gap G is installed by joining a plurality of floor covering materials 2 along the longitudinal direction, the ends of the adjacent floor covering materials 2 are connected to each other. By inserting and connecting the joint pin 5 to the insertion holes 25a, 25a, the floor cover members 2, 2 can be attached with their connection positions in the longitudinal direction aligned, and along the longitudinal direction of the gap G. When the relative displacements of the casings A and B occur, the adjacent floor cover members 2 and 2 are moved together as a unit. The inner surface of the insertion hole 25a is provided with uneven stripes along the circumferential direction so that the contact resistance with the outer peripheral surface of the inserted joint pin 5 is reduced.

  Further, the entire upper surface of the covering surface portion 21 of the floor covering material 2 is provided with an uneven surface for preventing slipping, and the upper surface of the concave surface portion 23 is also provided with an uneven surface.

  The support portions 3 and 3 provided at the end portions of the casings A and B are both formed by a cover material support member including a rail member 31 and a holder member 32 formed of an aluminum mold material.

As shown in FIG. 5, the rail member 31 constituting the cover material support member has an upper surface portion 31 b and a lower surface portion 31 b bent from the upper and lower end portions on one side of the main surface portion 31 a and projects the main surface portion 31 a. A guide recess 31d is formed on the other side surface, protruding outward from the side surface and bent upward in a key shape, and the projecting piece portion 28 of the floor cover material 2 is inserted and engaged with the main surface portion 31a. The key-like surface portion 31e is formed integrally.
The upper surface portion 31b and the lower surface portion 31c are formed with holes 31f and 31g for allowing a fixing tool 10 such as a fastening screw or a screw, which will be described later, to penetrate from the upper surface portion 31a to the lower surface portion 31c and to be screwed into the holder member 32. It is. The hole 31f is provided with a size through which the head of the fixing tool 10 passes, and the hole 31g is provided with a size through which only the shaft portion of the fixing tool 10 passes. The main surface portion 31a is formed with a hole portion 31h through which the shaft portion of the fixing tool 10 for connecting the floor covering material 2 is inserted. In addition, protrusions 31i for reducing sliding resistance with the floor covering material 2 are arranged on the upper surface of the upper surface portion 32b, and a convex surface portion 31j curved sideways is provided on the key-shaped surface portion 31e. is there. The convex surface portion 31j is provided so that the joint pin 5 can be inserted and bridged to the inner surface of the convex surface portion 31j at both ends when the rail members 31 and 31 are connected to each other by joining the end portions thereof. It is.
A plurality of the holes 31f, 31g, 31h are formed at predetermined intervals along the length direction of the rail member 31.

Further, as shown in FIG. 6, the holder member 32 protrudes sideways from the vertical support surface portion 32 b protruding upward at one end portion of the attachment surface portion 32 a fixed to the end portions of the housings A and B. The lateral support surface portion 32c is integrally formed.
The mounting surface portion 32a has a hole portion 32d through which a shaft portion of an anchor bolt 6 described later is inserted in the surface, and a hole portion 32e through which a shaft portion of the fixing tool 10 described later is inserted also in the lateral support surface portion 32c. It is formed. A plurality of the holes 32d and 32e are formed at predetermined intervals along the length direction of the holder member 32.
A concave portion 32f that engages with an edge portion of the upper surface portion 31b of the rail member 31 is formed in the upper portion of the vertical support surface portion 32b, and an end portion of an auxiliary sheet 9 described later is attached to the lower surface of the horizontal support surface portion 32c. A sheet connection recess 32g is provided.
In addition, the joint pin used when the holder members 32 and 32 are jointly installed at the end of the mounting surface portion 32a on the side where the vertical and horizontal support surface portions 32b and 32c are provided is bent in a substantially C-shaped cross section. The insertion frame 32h is provided at the other end, and an inwardly bent portion 32i that is curved inward while standing upward is provided at the other end. An edge portion of the insertion frame 32h is provided so that an end portion on one side of a holder cover member 33 (to be described later) can be engaged, and an end on the other side of the holder cover member 33 is provided on the inner folding portion 32i. It is provided so that the parts can be engaged.
In addition, you may form the hole part 32e using an electric drill at the construction site instead of forming beforehand.

  The joint material 4 is made of the same material as the floor covering material 2 and, as shown in FIG. 7, the upper portion 4a is provided with a width that closes the upper end opening of the concave portion 23, and the upper portion 4a Also, the lower part 4b is formed in a long shape with a cross-sectional shape that is wider than that. The lower portion 4b having a substantially downward C-shaped cross-sectional shape of the joint material 4 is formed so as to be easily crushed when a load is applied from both sides thereof, and the floor covering material in a state where the lower portion 4b is crushed and made narrow. The joint material 4 is pushed into the concave surface portion 23 from above 2 so that it can be easily mounted in the concave surface portion 23. The lower part 4b is formed in a size that allows the joint pin 5 to be inserted therein. Further, a plurality of protruding bars 4c are provided on the surface of the joint material 4, and the protruding bars 4c are difficult to be removed from the concave surface portion 23 by engaging and catching the uneven surface provided on the upper surface of the concave surface portion 23.

  Attachment of the expansion joint 1 of this embodiment constituted by these members to the floor F of the building can be performed by the following procedure.

First, holder members 32 and 32 are attached along the gap G to the ends of the casings A and B facing each other with the gap G interposed therebetween.
The attachment of the holder members 32 and 32 is performed by overlapping the attachment surface portion 32a of the holder member 32 on the recesses A1 and B1 formed in the portions facing the gap G at the ends of the casings A and B, and the anchor bolts 6 through the holes 32d. This is done by driving in and fixing. The recesses A1 and B1 are provided at a depth at which the tip of the vertical support surface portion 32b is substantially the same as or slightly lower than the floor surfaces Fa and Fb in a state where the holder member 32 is fixed. The floor surface F should not be stepped when the is attached.
If the holder members 32 and 32 are fixed to the recesses A1 and B1, the mortar 7 is embedded between the side surfaces of the recesses A1 and B1 and the vertical support surface portion 32b, and then the upper surfaces of the floor surfaces Fa and Fb. The surface material 8 is laid. Further, the auxiliary sheet 9 is installed in the gap G by engaging the end portions of the auxiliary sheet 9 with the sheet connection recesses 32 g and 32 g of the holder members 32 and 32 arranged to face each other in the gap G.

Rail members 31 and 31 are attached to the connecting portions 22 and 22 of the floor covering material 2 after the processing step of attaching the holder members 32 and 32, or before or in parallel with this processing.
The rail member 31 is attached by inserting the projecting piece portion 28 of the floor covering material 2 into the guide recess 31d of the rail member 31 to be engaged, and attaching the side surface to the surface of the key-like surface portion 31e which is the outer surface of the guide recess 31d. This is done by covering the part 29 and mounting it. With the rail members 31, 31 mounted on the floor covering material 2, as shown in FIG. 8, the upper surface portion 31b of the floor covering material 2 overlaps the upper surface portion 31b of the rail member 31, and the upper surface portion 31b of the upper surface portion 31b. The top surface is obscured. Moreover, the hole 31f formed in the upper surface part 31b can be exposed by grasping the edge part of the upper surface adherence part 29 and rolling it up (see FIG. 9).
If the rail members 31 and 31 are attached to the connection portions 22 and 22 of the floor covering material 2, one connection portion 22 of both the connection portions 22 and 22 and the rail member 31 are fixed integrally. The rail member 31 is fixed by screwing the fastener 10 into a guide recess 31d engaged with the protruding piece 28 from a hole 31h formed in the main surface 31a. The rail member 31 attached to the other connecting portion 22 is configured so that the protruding piece portion 28 can slide in the guide recess 31d.

And the rail members 31 and 31 attached to both the connection parts 22 and 22 of the floor covering material 2 are connected to the holder members 32 and 32 fixed to the said housings A and B, and the floor covering material 2 is attached to the housings A and B. Cover the gap G across the gap.
To attach the rail members 31, 31 to the holder members 32, 32, first, the rail member 31 is placed on the lateral support surface portion 32c of the holder member 32, and the lower surface portion 31c is overlapped on the lateral support surface portion 32c. The edge part of the upper surface part 31b of the rail member 31 is engaged with the recessed part 32f provided in the upper part of the vertical support surface part 32b. At this time, it is confirmed that the holes 31f and 31g formed in the upper surface 31b and the lower surface 31c of the rail member 31 and the hole 32e formed in the lateral support surface 32c of the holder member 32 are aligned vertically. . Next, the upper surface adherence portion 29 of the floor covering material 2 is lifted up, the fixing tool 10 is inserted from the exposed hole 31f of the rail member 31, and the tip of the fixing tool 10 is applied to the holes 31g and 32e that overlap vertically. The lower surface portion 31c of the rail member 31 and the lateral support surface portion 32c of the holder member 32 are integrally fastened and fixed.

  And the construction of the floor expansion joint 1 of this embodiment is completed by inserting and installing the joint material 4 in the concave surface portion 23 of the floor cover material 2 installed between the casings A and B so as to cover the gap G. To do.

  FIG. 10 shows a floor expansion joint according to another embodiment, which is a holder support member in addition to the rail member 31 and the holder member 32 as a cover support member constituting the support portion 3 of the floor cover member 2. 33, the upper space of the holder member 32 fixed to the housings A and B is configured to be covered with the holder cover member 33.

The holder cover member 33 is formed of an aluminum mold material like the rail member 31 and the holder member 32. As shown in FIG. 11, the side surface portions 33b and 33c are bent downward from both sides of the upper surface portion 33a. It is formed in a U-shaped cross-sectional shape, and an end portion of the side surface portion 33b has a bent portion 33d that engages with the inner bent portion 32i of the holder member 32, and an end portion of the side surface portion 33c has an inner side of the cover material. A protrusion 33e that protrudes obliquely upward and a fold 33f that engages with the edge of the insertion frame 32h of the holder member 32 are provided.
A hole 33g is formed in the upper surface portion 33a, and a hole 33h is also formed in a portion of the projecting piece 33e located immediately below the hole 33g. The entire upper surface of the upper surface portion 33a is provided with an uneven surface for anti-slip.

Construction of the floor expansion joint 1 of this embodiment is performed by attaching a holder cover member 33 to the holder member 32 in place of the embedding process of the mortar 8 performed in the above embodiment.
As shown in FIG. 12, the holder cover member 33 is attached by engaging the bent portion 33d of the holder cover member 33 with the inner bent portion 32i of the holder member 32 fixed to the recesses A1 and B1 of the casings A and B. In the state where the side surface portion 33c is in contact with the inner surface of the main surface portion 32a of the holder member 32, the upper surface portion 33a of the holder cover material 33 is pushed downward, and the side surface portion 33c is caused by the elasticity of the cover material. This is performed by press-fitting along the main surface portion 32a, and the folded portion 33f provided at the end portion of the side surface portion 33c engages with the edge portion of the insertion frame 32h of the holder member 32, so that the holder cover material 33 is held by the holder member. 32.

  If the holder cover material 33 is attached, the sealing material is filled in the gap portion outside the side surface portion 33b to make the floor surface F flat, and the cover body is formed in the hole 33g of the upper surface portion 33a of the holder cover material 33. By installing (not shown) and closing, the construction of the floor expansion joint 1 of this embodiment is completed.

In the maintenance, as shown in FIG. 13, the hole of the upper surface portion 33a of the holder cover material 33 is removed in a state where the filled sealing material is removed and the outside of the side surface portion 33b is a gap portion. The rod body 12 such as a screwdriver is inserted from the portion 33g, and the rod body 12 is pulled up in the direction in which the projection piece 33e is pulled up by the tip of the rod body 12 with the tip of the rod body 12 engaged with the hole g of the projection piece 33e. Is operated, the holder cover member 33 is displaced upward about the engaging portion between the inner bent portion 32i and the bent portion 33d, and the side portion 33c press-fitted into the main surface portion 32a is pulled upward. The holder cover member 33 that has been pulled out and fixed to the holder member 32 can be removed.
The hole 33g of the upper surface portion 33a and the hole 33h of the protruding piece 33e are not formed in the holder cover material 33 in advance, but the upper surface after the holder cover material 33 is attached and fixed to the holder member 32. A drill may be provided through the portion 33a and the projecting piece 33e.

FIGS. 14 and 16 show a floor expansion joint 1 according to still another embodiment, both of which are installed in the gap G between the mating portions of the floor and the inner wall.
When installing in the joint part of a floor and an inner wall, it replaces with the said holder member 32, the holder member 34 shown in FIG. 15 is fixed to the recessed part B1 of the housing B which is an inner wall, and this holder member 34 and the housing A are attached. Installation of the floor expansion joint 1 is completed by attaching the rail members 31, 31 attached to the floor covering material 2 to the fixed holder member 32 in the same procedure as in the above embodiment. The floor cover material 2 and the rail member 31, the holder member 32, and the holder cover material 33 that support the floor cover material 2 used in the above embodiment can be shared in this embodiment.

FIGS. 17 and 18 show another embodiment in which the end portions of the floor covering materials 2 and 2 are connected and joined together, and this is a connecting plate having a width that can be inserted into the concave portion 23. 11 between the end portions of the adjacent floor cover materials 2 and 2, the fixing tool 10 is screwed into the connecting plate 11 from above the concave surface portion 23, and the insertion hole 25 a on the lower side of the concave surface portion 23 is passed through, The end portions of the floor covering materials 2 and 2 are connected to each other via the connecting plate 11 by being fastened to the partition wall portion 25 below. Since the hollow insertion hole 25a, which is the attachment portion of the connecting plate 10, is located at the tip of the fixing tool 10, the insertion hole 25a serves as a guide so that the fixing tool 10 can be easily fastened. It has become.
In this case, the joint material 4 installed in the concave surface portion 23 of the floor covering material 2 has a shape in which a cutout portion 4d is provided in the lower portion 4b as shown in FIG. The joint material 4 is attached in such a manner that the cutout portion 4d overlaps with the portion to which the is attached.
Further, as a floor expansion joint of another aspect for joining floor covering materials together, a covering surface portion covering a gap disposed on the floor surface of the structure, and a casing provided on both sides of the covering surface portion and facing the gap It is formed in a band shape with a connection portion connected to a support portion provided at the end portion of the belt, and has a concave portion recessed downward from the covering surface portion, and is elastically deformed using a material having rubber elasticity. Using the floor covering material formed possible,
A plurality of floor cover members are installed along the gap, and a connecting plate is inserted between the end portions of the adjacent floor cover members in the concave portions of the two floor cover materials, and is bridged. Adjacent floor covering materials may be connected to each other by fastening with a fixing tool.

According to these types of floor expansion joints 1, when the casings A and B on both sides of the gap G are relatively displaced by an earthquake or the like, and the gap G expands or contracts, the gap X direction of both the casings A and B Is absorbed when the floor cover material 2 contracts or stretches, and the displacement in the gap Y direction causes the floor cover material 2 to be disengaged from both housings A. B can be slid and absorbed along the support portions 3 and 3 attached to B, respectively. Following the relative displacement of B in the same direction, the floor cover material 2 can be absorbed by elastic deformation.
The displacement in the gap X direction and the Z direction is caused by the floor cover material 2 contracting or extending in accordance with the displacement direction, and the displacement in the Y direction is absorbed by the floor cover material 2 slidingly moving along the same direction. Therefore, even if the two frames are relatively displaced in any of the X, Y, and Z directions with the gap G interposed therebetween, it is possible to form a defect in the floor surface F that covers the gap G with the floor covering material 2. Absent. Moreover, since the covering surface portion 21 is provided so as to be deformed downward from the concave surface portion 22 when the floor covering material 2 contracts along the X direction, a convex step can be formed in the covering surface portion 21. There is no. Even after the displacement of the frames A and B occurs, the floor surface F is kept flat, and there is no danger that the pedestrian will step into the missing part or crawl into the stepped part, thus ensuring the safety of walking. is there. Further, by inserting and installing the joint material 4 in the concave surface portion 23 of the floor covering material 2, the strength against the load applied from above can be further increased, which is safe.

The illustrated floor expansion joint 1 and its constituent members show an example of an embodiment of the present invention, and the present invention is not limited to this, and can be configured in other appropriate forms. .
The floor covering material 2 is provided in a cross-sectional shape in which the hollow portions 24, 24 are disposed on both sides of the concave surface portion 23. However, when the width of the gap G is narrow and the movable amount required for the floor covering material 2 is small, A floor covering member having a concave surface portion 23 formed in the covering surface portion 21 and having no hollow portions 24, 24 may be used. In that case, it is preferable that the joint material 4 is inserted and installed in the concave surface portion 23 in order to secure the strength against the load from above.
Moreover, although the cover support member which is the support part 3 was formed by the rail member 31 and the holder member 32, and also the holder cover member 33 and a plurality of members, it may be configured by a member in which these are provided integrally.

DESCRIPTION OF SYMBOLS 1 Floor expansion joint, 2 Floor cover material, 21 Cover surface part, 22 Connection part, 23 Concave part, 24 Hollow part, 3 Support part, 31 Rail member, 32 Holder member, 33 Holder cover material, 34 Holder member, 4 Joint Material, 5 Joint pin, 6 Anchor bolt, 7 Mortar, 8 Surface layer material, 9 Auxiliary sheet, 10 Fastener, 11 Connecting plate, 12 Bar body, A, B frame, G Gap (clearance)

Claims (15)

A cover material constituting an expansion joint provided in a structure, the covering surface portion covering a gap disposed on the floor surface of the structure, and an end portion of the housing provided on both sides of the covering surface portion and facing the gap In the floor covering material formed in a strip shape having a connection part connected to the support part provided in
The floor covering material has a concave surface portion that is recessed downward from the covering surface portion, and hollow portions that are respectively provided on both sides of the concave surface portion on the lower side of the covering surface portion, and are formed to be elastically deformable. And
The distance between the lower surface of the frame surface portion surrounding the lower portion of the hollow portion and the upper surface of the covering surface portion (the vertical width of the hollow portion: T) is approximately twice the formation depth (D) of the concave surface portion (T≈2 × D A floor covering material for an expansion joint, wherein the concave surface portion and the hollow portion are formed with a molding dimension of   The maximum extension amount (Ex) of the floor cover material due to the relative displacement of the housing in the direction in which the width of the gap widens is approximately twice (Ex≈2 × D) the formation depth (D) of the concave surface portion. The floor covering material for an expansion joint according to claim 1, wherein the floor covering material is set to an amount. A cover material constituting an expansion joint provided in a structure, the covering surface portion covering a gap disposed on the floor surface of the structure, and an end portion of the housing provided on both sides of the covering surface portion and facing the gap In the floor covering material formed in a strip shape having a connection part connected to the support part provided in
The floor covering material has a concave surface portion that is recessed downward from the covering surface portion, and hollow portions that are respectively provided on both sides of the concave surface portion on the lower side of the covering surface portion, and are formed to be elastically deformable. And
An expansion characterized in that an attachment portion for a connecting member is formed between the hollow portions so as to be bridged between the end portions of the floor cover material when the floor cover materials are connected in the longitudinal direction. Joint floor covering.   The floor of an expansion joint according to any one of claims 1 to 3, wherein an upper surface of the covering surface portion is inclined downward from both sides of the covering surface portion toward the upper edge of the concave portion. Cover material.   5. The concave surface portion has a configuration in which an opening width at an upper end thereof is narrow and a lower opening width is wider than that. 5. Expansion joint floor covering.   Both hollow portions are connected to a partition wall portion having one end projecting downward from the central lower portion of the concave surface portion, and the other end is surrounded by a frame surface portion connected to both lower surfaces of the covering surface portion. The floor cover of an expansion joint according to any one of claims 1 to 5, wherein the floor cover is narrow and wide on the lower side, and is provided in a curved shape bulging downward. Wood.   The floor covering material for an expansion joint according to any one of claims 1 to 6, wherein the floor covering material is formed using a material having rubber elasticity. The connecting part of the floor covering material connected to the support part provided at the end of the housing facing the gap is
A side surface-attached portion which is formed on a side outer surface of the frame surface portion surrounding the hollow portion and covers the side surface of the support portion and covers the side surface of the support portion;
A projecting piece portion that protrudes downward from the lower surface of the covering surface portion outside the side portion of the frame surface portion and engages with the guide recess portion of the support portion;
8. The device according to claim 1, wherein the cover surface portion is provided in a shape having a top surface covering portion that extends flatly on the outer side in the width direction and covers the top surface of the support portion and covers the top surface of the support portion. The floor covering material for an expansion joint according to any one of the above.   The floor cover body which consists of the floor cover material as described in any one of Claim 1 to 8, and the joint material inserted and installed in the concave-surface part of a floor cover material. A cover material constituting an expansion joint provided in a structure, the covering surface portion covering a gap disposed on the floor surface of the structure, and an end portion of the housing provided on both sides of the covering surface portion and facing the gap It has a connection part connected to the support part provided in the belt, is formed in a band shape, has a concave part recessed downward from the covering surface part, and can be elastically deformed using a material having rubber elasticity Floor covering material,
A floor cover body made of joint material inserted and installed in the concave portion of the floor cover material.   The floor cover body according to claim 10, wherein the floor cover material is formed to have hollow portions provided on both sides of the concave surface portion below the covering surface portion. The floor cover material according to any one of claims 1 to 8, or the floor cover body according to claim 9, 10 or 11, and
A cover material support member which is provided at an end portion of the housing facing the gap disposed on the floor surface of the structure and constitutes a support portion to which the floor cover material or a connection portion of the floor cover material of the floor cover body is connected; ,
Floor expansion joint with The cover material support member is a rail member having a guide recess for supporting the connecting portion of the floor cover material and slidably supporting the floor cover material along its longitudinal direction;
The floor expansion joint according to claim 11, comprising a holder member that is integrally connected to the rail member and fixed to an end of the housing. A belt-like shape having a covering surface portion covering a gap disposed on the floor surface of the structure and a connecting portion provided on both sides of the covering surface portion and connected to a support portion provided at an end portion of the housing facing the gap. In a floor expansion joint using a floor covering material that is formed to be elastically deformable using a material having rubber elasticity, having a concave surface portion that is recessed downward from the covering surface portion,
A plurality of floor cover members are installed along the gap, and a connecting plate is inserted between the end portions of the adjacent floor cover members in the concave portions of the two floor cover materials, and is bridged. A floor expansion joint characterized in that it has a configuration in which adjacent floor covering members are connected to each other by fastening with a fixing tool. It is a construction method of the expansion joint for floors according to claim 13,
Attaching the holder member along the end of the housing facing the gap,
Attaching the rail member to the connecting portion of the floor covering material;
Attaching the floor covering material to which the rail member is attached to the holder member;
A method for constructing a floor expansion joint.

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