JPH0238988Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a crack-inducing joint forming profile.

In concrete buildings, crack-inducing joints B ₁ and B ₂ as shown in Figure 3 are provided at appropriate locations in the building frame.
This crack-inducing joint is a place where cracks can be tolerated in the building frame A, and is located at the same position on the outer wall A ₁ and the inner wall A ₂ .
They are formed so that they face each other, and in the event of a major earthquake, cracks X _B are actively generated in the building frame A between the joints to prevent the spread to other areas and prevent disasters.

Conventionally, crack-inducing joints are formed by nailing joint rods to the inner surfaces of the outer wall formwork and the inner wall formwork before concrete is poured. To install the joint rods, first nail one of the joint rods above the markings to the inner surface of one of the formworks that was set first, and then nail them to the inner surface of the other formwork that was set after placing the wall reinforcements. It is common to mark the inner surface in alignment with one of the joint bars, and then nail the other joint bar.

Therefore, in this case, it is extremely difficult to attach the joint bar to the other formwork due to the narrow spacing between the formworks and the presence of wall striations, and it is especially difficult to nail the joint bar. For this reason, the pitch of the nails tends to be rough, and when removing the mold after pouring concrete, the joint bar may break or become distorted due to the lateral pressure of the concrete, or there may be problems between the joint bar and the formwork. In many cases, the concrete goes around and the joint rods are embedded in the wall. Furthermore, it is easy to forget about the joint rods on the inner wall, and concrete is often poured without attaching them. is also required.

The present invention attempts to solve these conventional problems.

As shown in the drawings, the present invention connects the corresponding exterior wall joint rods 1 and interior wall joint rods 2 in a removable manner by a plurality of parallel connecting rods 3. Both joint bars 1 and 2 are formed into a groove shape with tapered groove walls by a plate body, and outward flanges 11, 11, 21, 21 are formed on both side edges, and nail holes 12 are formed in these flanges. ...,22...
are arranged, and a plurality of through holes 14... are arranged in the groove bottoms 13, 23.
. . , 24 . . . are arranged at appropriate intervals, and the connecting rods 3 .
It achieved its intended purpose.

The embodiment shown in FIGS. 1 and 2 will be described below.

In Figs. 1 and 2, 1 and 2 are joint rods of the same shape for the outer wall and the inner wall. outward facing flange 11,1
1, 21, 21 are formed, nail holes 12..., 22... are arranged at equal intervals in these flanges, and through holes 14..., 24... are arranged in the groove bottoms 13, 23.
are arranged at appropriate intervals, and reinforcing joint pieces 15..., 25... are joined at appropriate locations at the groove openings.

3... are a plurality of connecting rods that connect the joint rods 1 and 2, these connecting rods are made of steel rods, and have an appropriate length corresponding to the wall thickness of the concrete wall, and The above-mentioned through holes 14 at both ends...,
24... are provided, and one threaded part 31 is short and the other threaded part 32 is short.
one nut 33 on one threaded part 31 and two nuts 34 on the other threaded part 32.
35 are screwed together.

Therefore, the connecting rod 3... has one threaded portion 31.
, the through hole 1 of the external wall joint rod 1 with the groove mouth facing outward.
4..., and by screwing and tightening the nut 33 in the joint bar groove to the threaded part 31, one end is removably connected to the external wall joint bar 1, and,
Similarly, the other threaded part 32 is connected to the through hole 24 of the inner wall joint bar 2 with the groove opening facing outward, and a nut 34 is screwed into the threaded part 32 within the joint bar groove and tightened. , the other end is removably connected to the inner wall joint rod 2.

The structure is as shown above, and when using it, first mark the inner surface of the outer wall side formwork _M1 that has been set,
Along this line, touch the joint rod 1 for the exterior wall and nail hole 1.
2. Nail this external wall joint bar 1 to the external wall formwork _M1 by driving nails N through the holes. Next, the nut 35 on the outside of the other end of the connecting rod 3 is removed, and when setting the inner wall formwork _M1 , the inner wall side formwork is once pressed against the other end of the connecting rod 3 to connect it. Mark the position of the rod, drill a hole in that part, and fit the hole into the threaded part 32 at the other end of the connecting rod 3 at the same time as the inner wall side formwork is set, so that the threaded part protrudes outside the formwork. Screw the nut 35 onto the end of the connecting rod 32 and tighten it to removably attach the other end of the connecting rod to the inner wall side formwork _M2 , and with this, the inner wall joint rod 2
abut against the inner surface of the formwork on the inner wall side.

After installing in this way, install the formwork as usual.
It is sufficient to pour concrete into M ₁ and M ₂ , and after the concrete has hardened, only the connecting rods 3 are buried and the others are removed.

In addition, the threaded part 31 at one end of the connecting rod 3... should be made long in the same way as the threaded part 32 at the other end, and two nuts should be screwed together to attach it to the outer wall side formwork _M1 in the same way as the other end. It may be attached by tightening with a nut. Further, the connecting rods 3 may use separators that hold the formwork at regular intervals. The joint bars 1 and 2 may be made of synthetic resin or the like.

According to the present invention, the corresponding external wall joint bar 1
and the inner wall joint rod 2 are connected by a plurality of parallel connecting rods 3.
Because they are removably connected, when assembling them into the formwork, by setting one joint bar in place, the other joint bar can also be set in place automatically and precisely. Even if the distance between the outer wall formwork and the inner wall formwork is narrow, or even if there is a wall line between them, they can be easily assembled, reducing the labor of installation, and the joint rods 1 ,2 is
The groove wall has a tapered groove shape, and has outward flanges 11, 11, 21, 21 on both side edges, and nail holes 12..., 22... are arranged in these flanges, so that the outer wall is tapered. Orientation flange 11, 11, 2
At points 1 and 21, nails can be easily driven into the formwork through the nail holes 12..., 22..., and in this way, the concrete can be securely fixed to the formwork, so that there is no concrete between the joint bar and the formwork. The joint rods won't get stuck in the wall by turning around, and they won't get bent or bent. Of course, they can be reused, and if you attach one joint rod, you can attach it to the other. Since the joint bar will inevitably be attached, it will be possible to eliminate forgetting to attach it, eliminate backtracking work, and achieve the intended purpose.

Furthermore, when a construction area is large and vertical concrete joints are to be performed, attaching laths to the connecting rods 3 makes it possible to accurately divide the joints at the joint rod positions, which is extremely useful in practice.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view, FIG. 2 is a perspective view of the main parts, and FIG. 3 is an explanatory view. 1, 2... Joint rod, 3... Connecting rod, 31, 32
...Threaded part, 33, 34, 35...Nut, M ₁
...Formwork on the outer wall side, M ₂ ...Formwork on the inner wall side.

Claims (1)

[Scope of utility model registration request] Compatible exterior wall joint bar 1 and interior wall joint bar 2
are removably connected by a plurality of parallel connecting rods 3..., and both joint rods 1 and 2 are formed into a groove shape with a tapered groove wall by a plate body, and
Outward flanges 11, 11, 21, 21 on both side edges
and nail holes 12...,2 in these flanges.
2... are arranged, a plurality of through holes 14..., 24... are arranged at appropriate intervals in the groove bottoms 13, 23, and the connecting rods 3... are installed in these through holes. Characteristic crack-inducing joint molding material.