JPH0643347Y2 - Joint material for concrete - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to improvement of a joint material to be embedded in a rooftop of a building, a road surface, or another concrete layer.

[Prior Art] Conventionally, a joint material of this kind has been composed of a long joint body made of an elastic material and a cap having a U-shaped cross section which is attached downward along the upper end of the joint body and is open downward. Some are known (for example, Japanese Utility Model Publication No. Sho 53-35932, Japanese Patent Laid-Open No. Sho 60).
-219305, JP 61-33763, JP 64-182
No. 33).

Then, at the time of construction, the joint material was arranged in a grid shape on the upper surface of the slab concrete, and the concrete was placed in each grid.

[Problems to be solved by the invention] However, in the conventional joint material, since it is necessary to hold down with mortar or the like so that the intersecting joint materials do not separate from each other, the construction is not only troublesome but also mortar. However, even when the concrete is suppressed, there is a problem in that when the concrete is poured, the intersecting joint materials are easily separated from each other to cause a gap, which makes it difficult to finish the construction surface neatly.

The present invention has been made in view of the above problems of the above-described conventional technology, and an object of the present invention is to provide a joint material for concrete in which the caps can be easily connected in a crossing direction. It is the one we are trying to provide.

[Means for Solving the Problems] Therefore, the present invention is to achieve the above object, and the contents thereof will be described below with reference to the embodiments shown in the drawings.

The present invention relates to a pair of side walls (6) of the cap (6) which face each other.
b, 6b) The outer surface has uneven parts (for example, ridges 10) that fit together.
And one of the concave portions 12) (for example, the ridges 10) are formed along the longitudinal direction thereof, and the other of the concave and convex portions (for example, the concave portion 12) is provided at one end (for example, the connecting portion 7a). The other end is provided with a connecting member (7) having a fitting portion (7b) fitted in the cap.

[Operation] According to the present invention, the connecting member (7) is attached to one of the uneven portions (10) formed on the outer surface of the side wall (6b) of the cap (6).
By fitting the other side (12) of the concave and convex portions formed at one end of the above, and by externally fitting the cap (6 ') arranged in a direction intersecting with the fitting portion (7b) at the other end, The caps are connected to each other via a connecting member in a direction crossing each other.

[Embodiment] The present invention will be described below based on an embodiment shown in the drawings.

In the figure, 1 indicates a joint material, and this joint material 1 is arranged in a grid shape on a foundation surface 3'formed by laying a waterproof layer 3 on the surface of a slab concrete 2, and in each grid Concrete is poured to form a concrete layer 4.

The joint material 1 is a long joint body 5 made of an elastic material,
A cap 6 having a U-shaped cross section, which is also elongated and is attached along the upper end of the joint body 5, and a connecting member 7 for connecting the cap 6 to each other in a direction intersecting with the cap 6.
And intermittently attached to the lower end of the joint body 5,
Is provided on the base surface 3'in an upright state.

The joint body 5 is formed into a long length by using, for example, expanded polyethylene as an elastic material.

The cap 6 is composed of an upper wall 6a and a pair of left and right side walls 6b, 6b extending downward from the left and right ends of the upper wall 6a so as to face each other.

A tape 9 is attached to the upper surface of the upper wall 6a, and the tape 9 is peeled off after the concrete is poured to prevent the concrete from adhering to the upper surface of the upper wall 6a.

The left and right side walls 6b face each other at an interval slightly smaller than the thickness of the joint main body 5, and the joint main body 5 is forcibly inserted into the space within the interval, and the elastic restoring force of the joint main body 5 causes the left and right side walls 6b to fall within the interval. Hold. The left and right side walls 6b are provided with protrusions 10 and 10 of two upper and lower steps, which have a substantially T-shaped cross section and are vertically spaced apart from each other as one of the concave and convex portions fitted to each other. Are formed symmetrically.

Also, on the inner surface of the left and right corners where the upper wall 6a and the side wall 6b intersect,
A pair of locking grooves 11, 11 which face each other and are recessed in a semicircle are formed.

The connecting member 7 is approximately the same size as the cap 6 and has a U-shaped cross-sectional connecting portion 7a that is open downward and the connecting portion 7a.
Has an outer surface shape that is the same as the inner surface shape of the cap 6 and is connected to the end portion of the cap 6, and is composed of a fitting portion 7b that is slightly smaller and has a U-shaped cross section that is open downward. To do.

Each side end of the left and right side pieces of the connecting portion 7a has a generally horizontal T-shape having an opening on the end face, which is the other of the concavo-convex portions which are fitted into the upper and lower two-step convex strips 10 of the cap 6, respectively. Upper and lower two-stage recesses 12, 12 are formed. Then, the upper surface of the upper piece of the connecting portion 7a is substantially flush with the upper surface of the upper wall 6a of the cap 6 in a state where the concave portion 12 of the side piece is fitted to the convex strip 10 of the cap 6. In addition, on the upper surface of the upper piece of the connecting portion 7a, the upper wall of the cap 6
It is advisable to attach the tape 9 in the same manner as the upper surface of 6a.

A pair of engaging protrusions 13 and 13 protruding in a semicircular cross section are formed on the outer surfaces of the right and left corners of the fitting portion 7b so as to fit in the locking grooves 11 on the inner surface of the cap 6.

The support leg 8 is separated from the bottom plate 14 and the upper surface of the bottom plate 14 by a distance that is slightly larger than the thickness of the joint body 5, and a pair of first and second support pieces 15 and 16 that extend upward facing each other. When,
Beside the second support piece 16 on one side, one third support piece 17 extending upward from the upper surface of the bottom plate 14 at a distance slightly smaller than the thickness of the joint body 5 and the first and second support pieces. From the upper surface of the bottom plate 14 to the first and second support pieces 1 at approximately the center of the facing interval of 15,16.
A piercing piece 18 protruding higher than 5, 16 is provided, and is integrally molded with a resin having appropriate elasticity and rigidity.

The first and second support pieces 15 and 16 are provided at their tips with holding portions 15 'and 16' which are bent inwardly toward each other.
The distance between the tips of 5'and 16 'is made slightly smaller than the thickness of the joint main body 5, and the first insertion groove 19 of the joint main body 5 is formed within the facing distance between the first and second support pieces 15 and 16.

Further, the joint main body 5 is provided within the space between the second support piece 16 and the third support piece 17.
The second insertion groove 20 is formed, and the tip end portion of the third support piece 17 is bent outward so as to form a dogleg shape.
The upper surface of 17 ′ and the upper surface of the sandwiching portion 16 ′ of the second support piece 16 form a taper surface that opens upward in a V shape at the open upper end portion of the second insertion groove 20. It is easy to insert the joint body 5 into the joint.

The piercing piece 18 has a sharp tip, and a plurality of projecting portions 18 ′ ... Do not allow the pieces 18 to penetrate further into the joint body 5.

Base surface 3'using joint material 1 having each of the above-mentioned configurations
In order to construct the concrete layer 4 on the above, the joint material 1 is first assembled according to the construction area and the thickness of the concrete layer 4 to be molded.

Here, a case where the concrete layer 4 is thicker than the height of the joint body 5 to be used will be described.

First, prior to assembly, the long joint body 5 and the cap 6
Is cut to a usable length, and the cap 6 is attached to the upper end of the joint body 5.

Next, the support legs 8 are formed at appropriate intervals on the lower end of the joint body 5.
Put on. The lower end portion of the joint main body 5 is inserted into the first insertion groove 19 so that the insertion piece 18 of the support leg 8 is pierced at approximately the center of its thickness (Fig. 2). Bottom plate of support leg 8
The height from the lower surface of 14 to the upper surface of the cap 6 attached to the joint body 5 is made to match the planned thickness of the concrete layer 4.

Then, the thickness of the concrete layer 4 is smaller than that of the joint body 5.
Since it is thicker than the height of the base, the joint main body 5 is held by the support legs 8 while being separated from the base surface 3 '.

On the other hand, another joint main body 5 ', which is cut to the same use length as the joint main body 5, is prepared, and the joint main body 5'is aligned with the second insertion groove 20 of the support leg 8 and is deeply inserted until it comes into contact with the bottom. Put in. In this way, the upper and lower joint main bodies 5, 5'are vertically held by the support legs 8 in a partially overlapped state in the middle of the height.

Since the upper and lower joint main bodies 5, 5'need to partially wrap in the middle of the height, the height of each joint main body 5, 5'is less than 1/2 of the thickness of the concrete layer 4. It needs to be a little expensive. Of course, if the height of the joint main body 5 is the same as the thickness of the concrete layer 4, the conventional supporting legs are used to make the foundation surface 3 '.
It may be placed on top of. Also, if the heights of the upper and lower joint bodies 5, 5'are made different, one of them is half the thickness of the concrete layer 4
It may be the following, but it is more advantageous from the viewpoint of manufacturing and construction to standardize the heights of the joint main bodies 5 and 5'as much as possible and use the same joint main bodies 5 and 5'upper and lower.

Then, at the intersection of the joint material 1, the connecting portion of the connecting member 7 is formed on the outer surface of the cap 6 in the two upper and lower convex shapes 10.
Similarly, the two upper and lower recesses 12 at the side end of 7a are fitted together. In order to fit the ridge 10 into the recess 12, it is necessary to fit the ridge 10 while deforming the recess 12 so that the ridge 10 fits into the recess 12 with the snap ring. Due to the elastic restoring force of, the concave portion 12 is restored to its original shape, and the ridge 10 does not come out of the concave portion 12 laterally (Fig. 2).

When the connecting member 7 is attached to the cap 6 in the orthogonal direction, the cap 6 ′ arranged in the orthogonal direction may be inserted into the other fitting portion 7 b of the connecting member 7 from the side. Cap 6
When the plug is inserted, the engaging projection 13 of the fitting portion 7b fits into the locking groove 11 on the inner surface thereof, and the cap 6 does not come off from the fitting portion 7b of the connecting member 7.

Then, the upper end of the joint main body 5 is also attached to the cap 6'connected in the orthogonal direction except for the portion where the fitting portion 7b is fitted.

As shown in the drawing, by connecting the two caps 6 ′ and 6 ′ through the pair of connecting members 7 and 7 in the directions opposite to each other on the left and right sides of the cap 6, the caps 6 and 6 ′ are connected. Can be connected in a cross shape, and only on one side on the left and right of the cap 6,
One cap 6'can be connected in a T-shape through the connecting member 7, and the crossing angle can be accurately maintained at 90 degrees.

In this way, when the joint material 1 is arranged in a grid shape on the base surface 3 ', concrete is placed in each grid to form the concrete layer 4.

In this way, when the concrete layer 4 is formed, the upper and lower joint bodies 5, 5'are vertically arranged side by side with the supporting legs 8 partially overlapped sideways in the middle of the height. Can be cut off from top to bottom.

FIG. 3 shows another embodiment of the support leg 8,
In this embodiment, the upper ends of the first to third support pieces 15 to 17 are bent in a corrugated shape, and the piercing piece 18 is set to be substantially the same height as the support pieces 15 to 17.

When the support leg 8 of the present embodiment is used, the first piece within the interval between the first and second support pieces 15 and 16 is corresponding to the lowering of the insertion piece 18.
The lower end of the joint body 5 can be easily inserted into the insertion groove 19, and the bent portions of the first to third support pieces 15 to 17 are curved, so that the joint bodies 5 and 5'can be easily inserted. The catching is reduced, and the insertion into the insertion grooves 19 and 20 can be performed more smoothly.

The insertion piece 18 may be lower than the first and second support pieces 15 and 16.

In the embodiment shown in the drawings, the ridges 10 are formed on the outer surface of the cap 6.
Although the concave portions 12 that fit into the convex strips 10 are formed in the connecting member 7, respectively, the concave groove may be formed on the outer surface of the cap 6 and the convex strips or the protrusions that fit into the concave portions may be formed in the connecting member 7. Good. Also, ridges
Although 10 and the recessed portion 12 are formed in two steps in the upper and lower directions, they may be formed in one step or may be formed in a plurality of steps.

[Effects of the Invention] As described above, according to the present invention, since the caps arranged in the intersecting direction can be connected to each other through the connecting member, it is easy to set the joint material and it is easy to set the concrete when pouring concrete. Not only can gaps be prevented from occurring, but the construction surface can be finished neatly. Further, since either one of the concavo-convex portion is formed on the outer surfaces of the side walls of the cap which face each other, not only can the cap be connected in a T shape or a cross shape, but also the cap can be formed along the longitudinal direction of the cap. Therefore, the cap can be freely connected to any position in the longitudinal direction in a direction crossing the cap.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an exploded perspective view, FIG. 2 is a sectional view showing a construction state, and FIG. 3 is a perspective view showing another embodiment of a support leg. 1 ... Joint material, 5 ... Joint body, 6 ... Cap, 7 ...
... connecting member, 7b ... its fitting portion, 10 ... ridge as one of the uneven portions, 12 ... recess as the other of the uneven portions.

Claims (1)

[Scope of utility model registration request] 1. A concrete joint joint material comprising a long joint body made of an elastic material and a cap having a U-shaped cross section which is open downward and is attached along the upper end of the joint body. On the outer surfaces of the pair of side walls, one of the concavo-convex portions that fit with each other is formed along the longitudinal direction thereof, and the other of the concavo-convex portions is provided at one end, and the other end is capped. A joint material for concrete, comprising a connecting member having a fitting portion fitted therein.