JPH0345443Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a new joint material with great industrial applicability.

Conventionally, joint materials installed to prevent water permeation due to shrinkage cracks in concrete structures such as concrete walls are, as is well known, installed in formworks through wooden or plastic joint rods prior to concrete pouring. After the concrete was poured, the joint rod was removed and the empty space created by removing the joint rod was caulked.

The present invention does not require such joints or caulking processes at all, and in that sense can speed up work and reduce costs.
Moreover, the purpose of the present invention is to provide a joint material at an extremely low cost that can absorb shrinkage cracks in concrete walls and prevent water leakage, which is superior to conventional products.

Next, the configuration of the present invention will be specifically explained with reference to the drawings showing one embodiment.

Reference numeral 1 denotes an outer member made of an elastic soft or semi-hard synthetic polymer material and having a U-shaped cross section with grooves 2 carved in the axial direction, as shown in FIGS. 3 and 4. As shown in FIG. 2, the groove 2 contacts the poured concrete 3 on its outer peripheral surface, and a through hole 4 is formed in the axial direction of the center of the bottom surface of the groove 2.

Reference numeral 5 denotes a spring member made of a hard synthetic polymer material having elasticity, and has an open end of a U-shaped cross-section that fits into the groove 2 of the outer member 1 and bulges in both directions. , are formed on fitting protrusions 6, 6 protruding from the palate of the outer member 1, and a wedge protrusion 7 protruding from the center of the outer bottom surface through the through hole 4 of the outer member 1. This is intended to strengthen the integral connection with the poured concrete 3 by wedge insertion into the poured concrete 3, and also to obtain a crack inducing effect.

Reference numeral 8 denotes an anchor fitting groove into which the base of the anchor 9 for joint filling material is fitted, which is carved in the wedge-fitting protrusion 7 as required;
FIGS. 3 and 4 show an embodiment in which the spherical base of the anchor 9 for joint filling material can be press-fitted.

In the joint material of the present invention, a main body 10 as shown in FIG. 1 is formed by integrally joining the above-mentioned outer member 1 and spring member 5 by means such as adhesion or welding.

In this case, the groove portion 2 of the outer member 1
If both inner surfaces and both side surfaces 51, 51 of the spring member 1 that fit into the groove 2 are formed into a reverse tapered shape and a tapered shape with a slight inclination angle, respectively, as shown in FIG. This is convenient for imparting restoring elasticity to the member 1.

Next, reference numeral 11 denotes a mounting cap formed of a hard synthetic polymer material, which has a tapered hollow portion 1.
A pair of fitting protrusions 6, 6 of the main body 10 are fitted into the opening edges formed by the fitting grooves 13, 1.
3 is carved, and the fitting grooves 13, 1
It is assumed that the inner diameter of the attachment cap 11 at the three portions is smaller than the outer diameter of the main body 10 at the fitting projections 6, 6 portions.

In the joint material of the present invention, the mounting cap 11 is fixed to the formwork 14 placed at a predetermined position on the construction site with a fixing part 15 such as a nail or a stapler, and then the spring of the main body 10 is fixed. Part 5
While compressing the edge of the opening, attach the fitting protrusions 6, 6 of the opening and insert the fitting grooves 13, 13 of the cap 11.
The outer member 1 is press-fitted into the spring member 5 and the outer member 1 is fitted onto the outer side of the spring member 5.
In other words, the main body 10 is provided with restoring elasticity easily and reliably.

In the joint material of the present invention, after the main body 10 is fitted into the mounting cap 11 as described above, concrete is poured, and the main body 10 and the poured concrete 3 are integrated in the manner shown in FIG. If the formwork 14 and attachment cap 11 are removed, a concrete structure such as a concrete wall equipped with the joint material of the present invention can be obtained in the manner shown in FIG.

In this case, when pouring concrete, if the anchor 9 for pour joint filler is attached to the anchor fitting groove 8 carved as necessary in the wedge projection 7, it can be used as a pour joint filler. Needless to say.

Incidentally, 16 and 16 in the drawings are voids for weight reduction, which are missing in the appropriate positions of the outer member 1.
Section 17 is the finished surface.

As is clear from the above structure, the joint material of the present invention has the following effects.

(a) Conventionally, joint material was fixed to the formwork through joint rods, and after concrete was poured, the joint rods were removed and caulking was applied to the empty space created by removing the joint rods. Therefore, there is no need to use joints or caulking.
In this respect, it greatly contributes to speeding up work and reducing costs.

(b) The overall structure of the outer member 1, the spring member 5, and the attachment cap 11 is strong against couples caused by lateral flow pressure during concrete pouring, and the formwork 14 and the attachment cap 11 are strong.
It is easy to withdraw from the system, and the practical effect in that respect is great.

(c) As is clear from FIG. 4, which shows the arrangement of the joint material of the present invention, the restoring elasticity of the spring member 5 in the direction of the arrow acts on the poured concrete 3 via the outer member 1. It can absorb shrinkage cracks in concrete structures such as concrete structures in a very purposeful manner, and its effectiveness in that respect is enormous. Moreover, by compressing the opening edge of the spring member 5 of the main body 10 and fitting it into the mounting cap 11, the restoring elasticity imparted to the main body 10 absorbs product tolerances of the main body 10 and the mounting cap 11. It has the advantage of being possible.

(d) The structure in which anchor fitting grooves 8 are carved in the wedge protrusions 7 as necessary not only has the effect of wedges into the poured concrete 3 and the effect of inducing cracks, but also has the effect of inducing cracks in the poured concrete 3. It is also possible to use it as a raw material at will, and it has a great effect in this respect as well.

(e) Due to its configuration, it can be manufactured extremely cheaply.

[Brief explanation of the drawing]

Each of the drawings shows one embodiment of the present invention; Fig. 1 is a cross-sectional view of the main body, Fig. 2 is a cross-sectional view of the mounting cap, and Fig. 3 shows the joint material of the present invention installed on a formwork. FIG. 4 is a cross-sectional view showing a state in which concrete has been poured, and FIG. 4 is a cross-sectional view showing a state in which the formwork and mounting cap in FIG. 3 have been removed. In the drawing, 1 is an outer member, 2 is a groove, 3 is poured concrete, 4 is a through hole, 5 is a spring member,
6, 6 is a fitting protrusion, 7 is a wedge-fitting protrusion, 8 is an anchor fitting groove, 9 is an anchor for pouring joints, 10 is a main body, 11 is a mounting cap, 12 is a tapered hole.
13, 13 is a fitting groove, 14 is a formwork, 15 is a fixing tool, 16, 16 is a hollow part, and 17 is a finished surface.

Claims (1)

[Claims for Utility Model Registration] 1. It is made of a soft or semi-hard synthetic polymer material with elasticity, and has grooves 2 cut in the axial direction so as to impact the poured concrete 3 on the outer peripheral surface which has a U-shaped cross section. an outer member 1 made of an elastic hard synthetic polymer material and fitted into the groove 2 of the outer member 1; The opening ends of the U-shaped cross-sections are bulged in both directions to form fitting protrusions 6, 6 that protrude into the palate of the outer member 1, and the outer bottom is provided at the center of the outer bottom surface. A main body 10 integrally formed by two parts of a spring member 5 having a wedge-fitting protrusion 7 protruding through a through hole 4 of the member 1, and an opening edge of a tapered hollow portion 12. Fitting grooves 13, 13 for fitting the pair of fitting protrusions 6, 6 of the main body 10 are carved in the fitting grooves 1.
A joint material comprising a mounting cap 11 made of a hard synthetic polymer material, the inner diameter of which is smaller at the fitting protrusions 6 and 13 than the outer diameter of the main body 10 at the fitting protrusions 6 and 6. 2. The joint material according to claim 1 of the utility model registration, wherein the wedge-in projection 7 has an anchor fitting groove 8 into which the base of the anchor 9 for a joint material is fitted.