JPH0519471Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a cap for joint material used as an expansion joint material for concrete, an earthquake-resistant joint material, and the like.

(Prior Art) Taking the expansion joint material shown in FIG. 7 as an example, a conventional cap is attached to the upper part of the joint material main body 10 made of a flexible foamable synthetic resin material in order to protect the joint material. The cap 20 is made of a hard material, and there are several widths and heights of the cap 20, each of which is molded using a separate mold.

(Problems that the invention aims to solve) With the conventional caps mentioned above, in addition to having to manufacture several types of expensive molds, it is also necessary to produce a large number of caps with different widths, heights, etc. in order to meet demand at any time. They must be kept in stock, which is not only an economic disadvantage but also requires complicated inventory management.

This invention was made in view of the above, and its main purpose is to provide a cap for joint material that can be manufactured at low cost and is extremely easy to manage in stock. The objects and benefits of the invention will become apparent from the following description and the accompanying drawings.

(Structure of the invention) Examples of the invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an end view showing a first embodiment of this invention, in which the joint material cap consists of a pair of side members 21, 21 and a surface member 22 that is engaged with both of the side members 21, 21.
It is made up of. A pair of side members 21, 21
A groove 21a is provided along the longitudinal direction in the upper part of each side face facing each other,
Furthermore, protrusions 21b are provided along the longitudinal direction at substantially interrupted portions of the respective side faces facing each other. The surface member 22 has stepped portions formed at both ends thereof in the width direction, and these stepped portions engage with groove portions 21 a provided in the side member 21 .

In this cap, the upper end surface of the main body of the joint material formed of synthetic resin foam is locked to the lower end of the protrusion 21b, and the upper end of the protrusion 21b is connected to the surface member 22 and the side member 21. The area surrounded by the two is adapted to form a space.

FIG. 2 is an end view showing a second embodiment of this invention, and this joint material cap is composed of a pair of side members 23, 23 and a surface member 24 that is engaged with both side members 23, 23. There is. A pair of side members 2
3 and 23, a groove 23a is provided along the longitudinal direction in the upper step of each side surface that faces each other, and a protrusion 23b is formed along the longitudinal direction in a substantially interrupted portion of each side surface that faces each other. The surface member 24 is formed to have a large thickness at both ends in the width direction, and these portions form the grooves 2 formed in the side member 23.
3a. In this cap as well, a region above the projection 23b and surrounded by the surface member 24 and the side member 24 forms a space.

FIG. 3 is an end view showing a third embodiment of this invention, and this joint material cap is composed of a pair of side members 25, 25 and a surface member 26 that is engaged with both side members 25, 25. There is. A pair of side members 2
5 and 25, a groove 25a is provided along the longitudinal direction in the upper part of each side facing each other, and a protrusion 25b is formed along the longitudinal direction in a substantially interrupted part of each side facing each other. ing.

In this cap, the upper end surface of the joint material main body is engaged with the lower end portion of a protrusion 25b formed at a substantially interrupted portion of the side surface of the side member 25.
A region above the protrusion 25b and surrounded by the surface member 26 and the side member 25 forms a space.

FIG. 4 is an end view showing a fourth embodiment of this invention, and this joint material cap consists of a pair of side members 27, 27 and a surface member 2 engaged with both of them.
It consists of 8. A protrusion 27a having a substantially T-shaped cross section is provided along the longitudinal direction on the upper part of each of the side faces of the pair of side members 27 that face each other, and a protrusion 27b is provided on the substantially interrupted part of each of the side faces that face each other. are provided along the longitudinal direction.

At both ends of the surface member 28 in the width direction, grooves corresponding to the cross-sectional shapes of the projections 27a formed on the side surface member 27 are formed along the longitudinal direction, and the projections 27a are formed on the surface member 28. By being engaged with the groove, the side member 27 and the surface member 28 are removably coupled. The upper end surface of the joint material main body is locked to the lower end of a protrusion 27b provided at a substantially interrupted portion of the side surfaces facing each other of the side member 27, and therefore, the upper end surface of the joint material body is connected to the surface member 28 above the protrusion 27b. The area surrounded by the side member 27 forms a space.

FIG. 5 is an end view showing a fifth embodiment of this invention, and this joint material cap is composed of a pair of side members 29, 29 and a surface member 30 that is engaged with both side members 29, 29. . The side members 29, 29 are
A groove 29a is provided along the longitudinal direction in the upper part of each side face facing each other.
A groove having the same shape as 9a is provided in the side interruption, and the lower end of this groove constitutes a protrusion 29b.

The surface member 30 has a space inside thereof, and protrusions provided at both ends in the width direction are engaged with grooves 29a and other grooves formed in the side member 29b, respectively. In this cap, a protrusion 2 provided at a substantially interrupted portion of the side surface of the side member 29
The upper end surface of the joint material main body is adapted to be engaged with the lower end portion of 9b. Therefore, in this cap, a space formed in the surface member 30 is provided above the joint main body.

FIG. 6 is an end view showing a sixth embodiment of this invention, and this joint material cap consists of a pair of side members 31, 31 and a surface member 3 that is engaged with both of the side members 31, 31.
It is composed of 2. The side surface member 31 has an upwardly inclined groove portion 30 in the upper part of the side surface facing the side surface member 31.
a is provided along the longitudinal direction, and a protrusion 31b is provided along the longitudinal direction on the substantially interrupted portions of the side faces facing each other.
is provided.

The surface member 32 has downwardly inclined protrusions formed at both ends thereof in the width direction, and these protrusions engage with the grooves 31a of the side member 31. This cap is configured such that the distance between the pair of side members 31a becomes narrower toward the bottom due to the shape of the groove portion 31a and the shape of the projections at both widthwise ends of the surface member 32.

In the embodiments shown in FIGS. 1 to 6 described above, an adhesive such as butyl rubber may be placed on the outer surfaces of the side members 21, 23, 25, 27, 29, and 31. In this case, it is possible to improve the adhesion strength between the outer surface of the side member and the concrete placed on the outside thereof.

In the embodiment described above, acute-angled protrusions are formed on the lower end surfaces of the side members 21, 23, 25, 27, 29, and 31 on the sides facing each other, and these acute-angled protrusions are By biting into the joint body made of resin foam, the cap can be prevented from separating from the joint body.

The cap of each of the above embodiments has a side member 2
The side members 1, 23, 25, 27, 29, and 31 are each molded using one mold, and the side parts facing each other are set to have a symmetrical shape, thereby forming the side member of one embodiment. It becomes possible to mold with one mold.

In addition, surface members 23, 24, 26, 28, 30
and 32, it is possible to construct a cap corresponding to each cap width by simply preparing several types of surface members having different lengths depending on the width direction dimension of the cap required.

The surface member has a shape that constitutes the surface of the cap, and therefore requires a relatively simple shape compared to the side member.Therefore, when molding the surface member according to the width direction dimension of the cap, several types of molds are used. It has a relatively simple shape and can be manufactured at low cost.

As described above, in the embodiment described above, the mold can be prepared depending on the type of the surface member, and one mold is sufficient for the side member. Furthermore, since each cap has a space formed between the surface member and the joint body, the space can accommodate expansion and contraction of concrete.

(Effects of the invention) Since this invention is constructed as described above, it has the following effects.

A: You only need to prepare several types of surface members with different width dimensions, one type of side member can be used in common for caps with different width dimensions, and the side members can be manufactured with one mold. It can be manufactured at extremely low cost.

B By simply preparing several types of surface members and one type of side member with different width dimensions, these combinations can meet the demand for caps with various width dimensions, significantly reducing inventory. Inventory management becomes extremely easy and costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is an end view showing the first embodiment of this invention;
Figure 2 is an end view showing the second embodiment of this invention, Figure 3 is an end view showing the third embodiment of this invention, and Figure 4 is an end view showing the third embodiment of this invention.
The figure is an end view showing the fourth embodiment of this invention, FIG. 5 is an end view showing the fifth embodiment of this invention, FIG. 6 is an end view showing the sixth embodiment of this invention, and FIG. FIG. 3 is an end view showing a conventional joint material cap. 10...Glut material body, 20...Cap, 2
1, 23, 25, 27, 29, 31... side member, 21a, 23a, 25a, 29a, 31a...
...Groove, 27a...Protrusion, 21b, 23b, 2
5b, 27b, 29b, 31b... protrusion, 2
2, 24, 26, 28, 30, 32...Surface member.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a joint material cap that is covered on the upper part of a joint material body formed of synthetic resin foam, a surface member is engaged with both widthwise ends of the surface member, respectively. a pair of side members having the same shape, each upper step of the side faces of the pair of side members facing each other and a widthwise end of the surface member are shaped so as to be relatively engageable, and the surface member protrusions are provided at substantially the middle of each of the side surfaces facing each other, a space is formed between these protrusions and the surface member in an area surrounded by the side surface member, and a lower end of the protrusion is formed. A cap for joint material, characterized in that the upper end surface of the joint material body is locked with. (2) Utility model registration claim 1, characterized in that grooves are provided in the upper portions of the side surfaces of a pair of side members facing each other, and the widthwise ends of the surface members are respectively engaged with these grooves. Cap for joint material as described in section. (3) A utility model characterized in that protrusions are provided on the upper portions of the side surfaces of a pair of side members that face each other, and these protrusions are engaged with grooves formed at both ends of the surface member in the width direction. A cap for joint material according to claim 1.