JPS601171Y2 - Anchor for tensile support of concrete formwork - Google Patents

Description

[Detailed explanation of the invention] The present invention, for example, involves concrete concrete pouring in stages from above to the top. Completed construction: Concrete M construction was carried out on the four sides of the clitoris part.
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This invention relates to an anchor that can be embedded and fixed in a reinforced concrete part and used to tension and support concrete formwork.

In general, in concrete structures constructed using the construction method described above, anchors are inserted when the concrete in the poured concrete part has hardened to a single layer state so that the embedded anchors can be reliably held in position. Measures will be taken to

Conventionally, as this type of anchor, for example, Utility Model 51-4
As can be seen in the 4th track of Publication No. 0661, the tip of the rod is bent into a dogleg or dogleg shape to form an embedded part in the poured concrete above the lower rod. A mower is known in which the extension part runs parallel to the lower end side of an upper rod-shaped member whose upper end is passed through the formwork and fixed, and this parallel part is tightened and fixed with a connecting band.

However, in this known method, the anchor must be inserted into the concrete so that the angle of inclination of the upwardly protruding part of the anchor part matches the angle of inclination of the formwork fixing rod, and the anchors are adjacent and parallel to each other. However, it was difficult to use, and the connection with the connecting pad required a strong degree of tightening.

In view of these points, the present invention allows the anchor to be inserted into a part of the concrete part at any time without any particular restrictions on the position or insertion angle, and moreover, the anchor can be inserted continuously from the concrete formwork side. The object of the present invention is to provide an anchor for tensile support of concrete formwork that can be easily and reliably connected to a tension-resistant stem.

As explained at the beginning, the anchor according to the present invention is embedded and fixed in the poured concrete part, and the free end of the tensile resistant device connected from the concrete formwork is connected to the protruding end. An anchor for tensile support of a concrete formwork, which is embedded and fixed in a poured concrete part.A hole is formed in the upwardly projecting end of the anchor body, and the tension-resistant device is connected to the hole. The present invention is characterized in that a connecting member having a connecting hole is connected so as to be freely rotatable around the axis of a shaft inserted through the hole.

That is, according to the present invention, the upper protruding end of the anchor body from the concrete surface is not directly connected to the anchor body embedded in the poured concrete and the tension-resistant device installed in series from the formwork side. A hole is formed in the part, a connecting member is attached to the hole so as to be able to freely rotate around the axis, and the connection is made through a connecting hole formed in the connecting member. The embedding position and embedding angle of the anchor body into the poured concrete can be freely set.

In other words, the anchor body can be inserted into the poured concrete at any position away from the formwork, and there is no need to set the embedment angle to match the inclination angle of the tension-resistant tool. It is only necessary to insert it in the vertical direction at any time, and when connecting with the tension-resistant device, rotate the connecting member freely to match the angle of inclination of the tension-resistant device, and insert it into the connection hole. Easy to insert a shaft such as a connecting pin into the
Since the connection can be made safely and reliably with simple steps, there is an advantage that various operations from embedding the anchor in the poured concrete to connecting it to the tension-resistant device can be performed extremely easily.

In other words, 1. Even if the relative posture between the anchor and the tension-resistant device is unexpectedly bent due to an error in the insertion and fixing position of the anchor, it can be easily fixed by rotating the connecting member.
It has the advantage that the two can be easily connected.

Embodiments of the present invention will be described below based on the drawings.

Figure 1 shows concrete being applied sequentially from the bottom to the top.
The work status is shown when constructing a concrete retaining wall of a desired height by pouring in stages. 2 shows the previously poured concrete part, and the second concrete part is placed above 1. A concrete formwork for making
The concrete formwork 2 is fixedly embedded in the concrete formwork 1, and the free end of the tension-resistant device 3, which is connected to the concrete formwork 2 so as to be vertically swingable, is connected to its protruding end. This is an anchor that supports the concrete formwork 2 in tension so that a part of the pouring load acting on the concrete formwork 2 is borne by the cast concrete part 1.

FIG. 2 shows the anchor A, which has a steel plate 4 (an example of a strip-shaped raw plate) with a sawtooth-shaped ρ pull-out resistance protrusion 5 formed on the negative side thereof, and the other side It is constructed by punching out a saw-tooth-like protrusion at the tip of the side, and by bending the protrusion at right angles to the plate surface, the pull-out resistance/reinforcement part 7 is formed from this protrusion. An anchor main body 6 is provided, and a protrusion of the anchor main body 6 is provided with a connecting member 8 made of a bent iron plate and having a U-shaped cross section and a connecting hole 8a to the tension-resistant tool 3. is attached so as to be freely rotatable around an axis 3 perpendicular to the plate surface.

FIGS. 3 and 4 show different embodiments, and in the former, a steel plate 4 is punched to form sawtooth-like pull-out resistance protrusions 5, 5 on both sides thereof. In the latter case, the protrusions 5, 5 in the former are bent at right angles to the plate surface and in opposite directions to form the anchor body 6 on both sides of the anchor body 4. The reinforcing portions 7', 7' also serve as pull-out resistance.

Incidentally, holes 9, 9 are formed in the protruding ends of both anchor bodies 6, 6 to be used as holes for connection to the tension-resistant device 3 and for mounting the connecting member 8 in the above embodiment.

In addition, in these two different embodiments, the protrusions 5, 5 on both sides were provided at the same position in the embedding direction as shown in the figure.
The protrusions 5, 5 on both sides may be provided at positions offset in the embedding direction.

[Brief explanation of the drawing]

The drawings show an embodiment of the anchor for tensile support of concrete formwork according to the present invention.
The figure is a perspective view, and FIGS. 3 and 4 are perspective views showing different embodiments. 1... Placed concrete part, 2... Concrete formwork, 3... Tensile resistant tool, 6...
... Anchor body, 8... Connection member, 8a.
...Connecting hole, 9...hole, a...strawberry.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. By embedding and fixing in the poured concrete part 1 and connecting the free end of the tensile resistant device 3 which is connected to the protruding end 1 of the concrete formwork 2, the concrete mold Placed concrete part 1 will be used as an anchor to support the frame 2 in tension.
A hole 9 is formed in the upwardly protruding end of the anchor body 6 to be embedded and fixed, and a connecting material 8 having a connecting hole 8a for connecting the tension-resistant tool 3 is connected to the hole 9. An anchor for tensile support of concrete form 1, which is connected so as to be freely rotatable around the axis 3 of the shaft inserted through the hole axis. 2. An anchor for tensile support of a concrete mold according to claim 1 of the utility model registration claim, wherein the connecting member 8 has a U-shaped cross section.