JP3193908B2 - Joint material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint material used for installing a horizontal slit member, and more particularly to a joint material which can be easily installed and can absorb a dimensional error of a horizontal joint bar.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Unexamined Patent Application Publication No.
As shown in the official gazette, it is widely practiced to install a slit material between the formwork and then cast concrete between the formwork and to install a slit material in the concrete wall for seismic reinforcement. ing.

[0003] Also, in the vertical joint area of concrete, a post-cast concrete is cast on a pre-cast concrete through a horizontal slit material, so that the concrete wall is seismically reinforced.

[0004] When a horizontal slit member is applied to a concrete splicing portion, in order to prevent infiltration of rainwater from the outside, the horizontal slit member is arranged with a downwardly sloped portion formed at the outer end. There is a need to.

Therefore, conventionally, a large-sized special horizontal joint bar is attached to the inner surface of the formwork, and the downward slope portion is formed by the special horizontal joint bar.

[0006]

In the case of the above-mentioned conventional method, since a large special horizontal joint bar is required, it is not easy to mount the joint on a formwork, and the horizontal joint bar is fixed at an accurate position. It takes a lot of time to complete the process, and the weight of the entire formwork increases, and a large horizontal joint bar hinders the workability.

The present invention has been made in view of such a situation, and can be constructed using a small general horizontal joint bar, thereby improving the installation position accuracy and increasing the weight of the entire formwork. It is an object of the present invention to provide a joint material capable of improving workability by suppressing the jointing.

Another object of the present invention is to provide a joint material capable of absorbing a dimensional error of a horizontal joint bar and always forming a good downgraded portion.

[0009]

SUMMARY OF THE INVENTION To achieve the above object, the present invention relates to a joint material installed at a position of a horizontal joint bar attached to an inner surface of a formwork, wherein the joint material is disposed on an upper surface side of the horizontal joint bar. A horizontal portion having a tip extending toward the opposite side of the formwork; a slope forming portion extending obliquely downward from the tip of the horizontal portion and having a tip contacting the horizontal joint bar; And a mounting portion fixed to the mold via a stopper. Since the horizontal joint rod only needs to have the function of positioning the joint material, the joint member can be reduced in size and can be easily mounted at an accurate position. Positioning becomes easy. Moreover, the weight of the entire formwork can be reduced, and the workability can be improved.

[0010] The present invention is also characterized in that the dimension from the tip of the slope forming portion to the outer surface of the mounting portion is set to be equal to or less than the horizontal projecting dimension of the horizontal joint bar. This makes it possible to align the tip of the slope forming portion with the lower surface of the horizontal joint bar. Even if there is a dimensional error in the horizontal joint bar, the mounting portion is brought into close contact with the formwork, and the joint stability of the joint material is secured. Can be improved.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a joint material according to an embodiment of the present invention. The joint material 1 is installed at a position of a horizontal joint rod 3 attached to the inner surface of a formwork 2 and is pre-cast concrete. A downgraded portion 4a can be formed at an end portion of the groove 4.

As shown in FIGS. 1 and 2, the joint material 1 is disposed on the upper surface of a horizontal joint rod 3 and the tip thereof is opposite to the formwork 2.
A horizontal portion 5 extending to the side, a slope forming portion 6 extending obliquely downward from the tip of the horizontal portion 5 and contacting the horizontal joint bar 3, and rising vertically from the base end of the horizontal portion 5 to the inner surface of the formwork 2. And a mounting portion 7 which is in close contact with the mounting portion 7.
Mounting holes 7 for fixing to the formwork 2 via fasteners such as
a is provided.

As shown in FIG. 2, the dimension L1 from the tip of the slope forming section 6 to the outer surface of the mounting section 7 is set to a value smaller than the horizontal projecting dimension L2 of the horizontal joint bar 3. As a result, the tip of the slope forming portion 6 is arranged along the lower surface of the horizontal joint bar 3 so that the dimensional error of the horizontal joint bar 3 can be absorbed and the mounting portion 6 can be brought into close contact with the formwork 2. I have.

Next, the operation of the present embodiment will be described. First, Fig. 3
(A) As shown in FIG.
Install. Since the horizontal joint rod 3 only needs to have a positioning function of the joint material 1 described later, a small one can be used. For this reason, positioning to the mold 2 is easy, and mounting can be performed with high accuracy.

Next, as shown in FIG. 3 (b), the joint material 1 is installed in a state where the horizontal portion 5 is placed on the upper surface of the horizontal joint bar 3, and the mounting portion 7 is formed with a nail 8 or the like. Fix to 2.
At this time, since the tip of the slope forming portion 6 is arranged along the lower surface of the horizontal joint bar 3, there is a dimensional error in the horizontal joint bar 3, and the protrusion dimension L2 (see FIG. 2) changes. However, this can be absorbed by the joint material 1 and the mounting portion 7 can be brought into close contact with the inner surface of the formwork 2.

Next, as shown in FIG. 4 (a), the precast concrete 4 is poured to the joint 5 at the horizontal portion 5 position. At this time, the preformed concrete 4
A force that pushes upward from the side acts, but since the mounting portion 7 is in close contact with the inner surface of the formwork 2,
The installation state of the joint material 1 can be stabilized.

That is, if the joint material 1 is installed in a state where there is a gap between the mounting portion 7 and the formwork 2, the slope forming portion 6 is pushed upward by the force acting from the precast concrete 4 side. The joint material 1 as a whole rotates counterclockwise in FIG. 4A with the position near the base end of the horizontal portion 5 as a fulcrum, and a gap is formed between the slope forming portion 6 and the horizontal joint bar 3. Ready-mixed concrete may flow into the space inside the joint material 1. The inflow of the ready-mixed concrete becomes a serious problem since it is not known until the formwork 2 and the joint material 1 are removed after the pre-cast concrete 4 is cured.

On the other hand, in the case of the joint material 1 according to the present embodiment, the joint material 1 can be installed in a state where the mounting portion 7 is always in close contact with the inner surface of the formwork 2. There is no such problem at all.

After curing of the precast concrete 4, the form 2 and the joint material 1 are removed as shown in FIG.
Then, the downgraded portion 4 a is formed at the outer end of the upper surface of the precast concrete 4. Therefore, a horizontal slit member 9 is provided on the upper surface of the precast concrete 4 including the downward slope 4a.

Next, as shown in FIG. 5A, a post-cast concrete form 11 having joint bars 10 is installed at a position above the outer surface of the pre-cast concrete. 12 is cast.

After curing of the post-cast concrete 12, FIG.
As shown in (b), the post-cast concrete formwork 11 and the joint bars 10 are removed, and the end of the horizontal slit material 9 is
The work is completed by filling a sealing material 13 such as a caulking material.

Thus, a small horizontal joint rod 3 and joint material 1
By using (1) and (2), the downgraded portion 4a can be formed in the precast concrete 4, so that the construction is easy and the installation accuracy can be improved.

Although not particularly described in the above embodiment, the joint material 1 may be made of metal or plastic. Further, the slope forming portion 6 of the joint material 1 is not limited to the case where the tip is arranged along the lower surface of the horizontal joint bar 3.
May be in contact with the inner end surface of the first member.

[0024]

As described above, the present invention relates to a joint material installed at the position of a horizontal joint bar attached to the inner surface of a formwork. A horizontal portion extending to the frame side; a slope forming portion extending obliquely downward from a tip of the horizontal portion, and a tip contacting the horizontal joint bar; and rising along a mold inner surface from a base end of the horizontal portion;
And a mounting portion fixed to the formwork via a stopper, so that the horizontal joint rod only needs to have a function of positioning the joint material, and thus the size is small. In addition to this, it is possible to easily mount the device at an accurate position. For this reason, while positioning of a joint material becomes easy, weight reduction of the whole formwork is also attained and workability can be improved.

According to the present invention, since the dimension from the tip of the slope forming portion to the outer surface of the mounting portion is set to be equal to or smaller than the horizontal projecting dimension of the horizontal joint bar, the tip of the slope forming portion is set to the horizontal joint bar. Even if there is a dimensional error in the horizontal joint bar, the mounting portion can be brought into close contact with the formwork to improve the mounting stability of the joint material.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a joint material according to an embodiment of the present invention.

FIG. 2 is an enlarged view showing details of a joint material shown in FIG. 1;

3 (a) and 3 (b) are explanatory diagrams sequentially showing a seismic retrofitting method for a concrete wall using the joint material of FIG. 1 according to a procedure.

FIGS. 4A and 4B are explanatory diagrams sequentially showing the procedure following FIG. 3;

FIGS. 5A and 5B are explanatory diagrams sequentially showing the procedure following FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joint material 2 Formwork 3 Horizontal joint rod 4 Precast concrete 4a Downhill part 5 Horizontal part 6 Slope forming part 7 Mounting part 7a Mounting hole 8 Nail 9 Horizontal slit material 10 Joint rod 11 Postcast concrete formwork 12 Postcast Concrete 13 Sealing material L1 Dimension L2 Projection dimension

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04G 15/06 E04G 9/10

Claims (2)

(57) [Claims] 1. A joint member installed at a position of a horizontal joint bar attached to an inner surface of a formwork, wherein the horizontal portion is disposed on an upper surface side of the horizontal joint bar and has a tip extending to a side opposite to the formwork; A slope forming portion that extends obliquely downward from the tip of the portion, and the tip contacts the horizontal joint bar; rises from the base end of the horizontal portion along the inner surface of the mold, and is fixed to the mold via a stopper. A joint part; and a joint part. 2. The joint material according to claim 1, wherein a dimension from a tip of the slope forming portion to an outer surface of the mounting portion is set to be equal to or less than a horizontal projecting length of the horizontal joint bar.