JPS5921233Y2 - Intermediate bar of separator for concrete formwork - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intermediate bar of a separator for concrete formwork that is fixedly mounted across a pair of opposing joint stands that can be locked and fixed to the concrete formwork.

In the conventional intermediate bar of this kind, the strip plate has a cross-sectional shape of an upwardly opening U-shape, and opposing side walls forming this U-shape are located relatively long apart in the width direction of the intermediate bar. It was constructed by bending it.

During the hardening of the poured concrete, as the water content oozes upward over time, conversely, concrete components such as sand and cement descend from above. However, since the opposite side walls are located relatively long apart, the concrete component guided down along the outer surfaces of the opposite side walls has a width that extends to the area where the opposite side walls are integrally connected at the lower ends of each side. It is not possible to wrap around the bottom of the intermediate bar, which is relatively long in the direction, and as a result,
A void S corresponding to the increased moisture volume was created below the bottom, reducing the strength of the hardened concrete wall (see Figure 6).

In addition, the intermediate bar has the function of pulling and supporting the opposing formwork on both sides of the concrete pouring space through the joint tables connected to both ends of the intermediate bar in the longitudinal direction. Although it is required to have high tensile strength, bending strength and torsional strength in the transverse direction with respect to the longitudinal direction are not so required. It would be uneconomical in terms of materials to construct a U-shaped cross section with long distances.

・The present invention takes into account these problems and achieves economy in terms of materials, has sufficient tensile strength, and also avoids the formation of voids below concrete when it is poured. It is intended to provide an intermediate bar.

The intermediate bar of the separator for concrete formwork according to the present invention is composed of a band-shaped plate whose width direction is vertically oriented when it is fixedly mounted between the joint stands, and this band-shaped plate has a lateral side. A bent portion for tensile reinforcement with a relatively small amount of protrusion is formed, and a plurality of connecting pin insertion holes are bored at predetermined intervals along the longitudinal direction in both end portions that connect to the joint table. It is characterized in that both ends thereof are connected to the joint base using the connecting pin insertion hole.

According to this, while the poured concrete is hardening, the concrete components that descend due to the rise in moisture are smoothly guided along both sides of the strip plate in the vertical position, and then smoothly below the lower end surface. As a result, the above-mentioned voids are avoided.

Therefore, hardened concrete walls can be built with great strength.

Moreover, since it is simply composed of a single strip plate that is positioned vertically, it is possible to reduce the cost in terms of materials compared to conventional ones, while also reducing the size of the actual space on the sides. Therefore, even though it is constructed from a single band-shaped plate, it can have sufficient tensile strength and can strongly support the opposing formwork.

Moreover, even if the spacing between the formworks that determine the thickness of the concrete is different, the same product can be used because there are multiple connecting pin insertion holes on both ends. The connection can be made by simply inserting the connecting pin into the connecting pin insertion hole, which is much more convenient and efficient than the structure in which bolts and nuts are inserted. It also has the remarkable effect of being able to be fixed firmly in use.

Hereinafter, an embodiment of the present invention will be described based on the drawings.One end has a flat plate-shaped locking part 1 inserted between the abutting end surfaces of vertically adjacent metal box-shaped concrete formworks 6, 6. At the same time, in a joint base 3 made of steel or stainless steel, which has an intermediate bar connecting part 2 having an upwardly opening U-shaped cross section and having a space at the other end having a width approximately the same as the plate thickness of the intermediate bar 4 described later, A U-clip insertion hole 1a is formed approximately in the center of the stop part 1, and a pair of connection pin insertion holes 2b, 2b are provided at the same phase on opposite side walls 2a, 2a of the connection part 2. A plurality of sets are bored at appropriate intervals along the length of the portion 2, and a perforated cutting line 3a is recessed between the locking portion 1 and the connecting portion 2.

4 is two joint stands 3, 3 configured as described above.
An intermediate bar to be fixedly mounted between the two is a long and flat steel strip plate 4A having a length that is approximately the same as the length of the connecting portion 2 at both ends in the longitudinal direction. The crossing part 4a,
4a is in a flat state, and both flat parts 4
The upper half and the lower half of the portion 4C between a and 4 a are pressed to a relatively small extent in opposite directions and in the lateral direction perpendicular to the width direction of the plate in the entire length range in the longitudinal direction to make the part 4C tensile resistant. Reinforcing solid portions 4 d and 4 d are formed to have a vertically elongated S-shaped cross section, and connecting pin insertion holes 4 b and 4 b are formed in both flat portions 4 a and 4 a, respectively.
Along the longitudinal direction of the bar 4, the hole 2b in the connecting portion 2
, 2b are bored at intervals larger than the adjacent intervals.

Flat portions 4a, 4a at both longitudinal ends of this intermediate bar 4
, respectively, the connection part 2 in the two joint stands 3, 3
, 2 from above, and there are multiple 7L4b and 2a, respectively.
, 2a..., match the phases of appropriate ones, and insert a headed connecting pin 5°5 into them in common.
The separator A is constructed by connecting the three members 4, 3.3 to each other.

This separator A is attached to the locking portions 1, 1 at both ends in the longitudinal direction.
6.6...
When inserted between the abutting end surfaces of the circumferential side plates 5a, 5a..., a U-clip insertion hole 6b is formed vertically through the abutting portion of the circumferential side plates 5a, 5a. , 6b
. . . and the holes 1a, 1a of the locking parts 1, 1 are made to match in phase, and these holes 5a, 5a, la, . . .
Insert and lock the U-clip 7.7 into the adjacent formwork 6, 6...
...At the same time as connecting the comrades, separator A is fixedly connected to the connected formworks 6, 6, and this separator A is used to pull and support the opposing formworks 6, 6... .

Then, when concrete is poured between the opposing formworks 6, 6, the moisture content rises while the concrete hardens, and along with this, concrete components such as sand and cement fall. .

This component smoothly guides down along the outer surface of the intermediate portion 4C of the intermediate bar 4, and then smoothly wraps around and enters the lower end surface 4e of the intermediate portion 4C.
There will be no voids below.

For joint stands 3 and 3, concrete or
Opposite side walls 2a, 2a of the connecting parts 2, 2...
Guided down smoothly along the outer surface of the
a, 2a...... When you reach the bottom folded part,
In order to smoothly go around and enter the lower part along the smooth curved outer surface of this folded part, the joint base 3,
No voids are formed below 3.

When the formwork 6 is dismantled after the concrete has hardened, the locking portion 1°1 exposed from the concrete wall surface is broken off along the cutting lines 3a, 3a.

The length of the separator A is determined by selecting the holes 4b, 2b, 2b, . . . into which the connecting pins 5, 5 are to be inserted.

FIG. 5 shows another embodiment of the intermediate portion 4 of the strip plate 4A.
The upper end and the lower end of C are pressed and protruded relatively small in the same direction to form actual portions 4 d and 4 d for tensile reinforcement, and the overall cross-sectional shape is a vertically long C-shape. It is.

Also in this case, the middle part of the bar of the concrete component 4
C. The downward wrap-around intrusion is performed well.

FIG. 6 shows a conventional bar in which both side walls of the intermediate bar are separated by a long distance in the width direction, and a large gap S is generated below the bar.

[Brief explanation of the drawing]

The drawings show an embodiment of the intermediate bar of the separator for concrete formwork according to the present invention, and Fig. 1 is a plan view of the intermediate bar connected to the formwork with joint stands connected to both ends, and Fig. 2 is a longitudinal side view of the same. Figure 3 is a vertical sectional front view taken along the line III--III in Figure 2, Figure 4 is a vertical sectional front view taken along the line IV-IV in Figure 2, and Figure 5 is a longitudinal sectional view corresponding to Figure 4 according to another embodiment. It is a front view. Incidentally, FIG. 6 is a longitudinal sectional front view showing a conventional one. 3...Joint stand, 4A...Strip board, 4d...Real section, 6...Concrete formwork.

Claims (1)

[Scope of utility model registration request] It has a U-shaped cross section, which has a flat plate-shaped locking part 1 inserted between the abutting end surfaces of the concrete formworks 6, 6, and has a space having a width approximately the same as the thickness of the intermediate bar 4, which will be described later. An intermediate bar fixed between two joint stands 3, 3 having an intermediate bar connecting portion 2, which is a long flat strip plate 4A, connected to the connecting portion 2 at both ends in the longitudinal direction. The connecting portions 4a, 4a are left in a flat state, and the intermediate portion 4C is formed into protruding portions 4d, 4d for tensile reinforcement that have a small amount of protrusion in the lateral direction and are long in the longitudinal direction. Furthermore, a plurality of connecting pin insertion holes 4 d , 4 d are formed in both the flat portions 4 a , 4 a at predetermined intervals along the longitudinal direction, and the two joint stands 3 . Intermediate bar of a separator for concrete formwork, characterized in that the connecting parts 2, 2 in 3 are configured to be connected to each other via connecting pins 5, 5 with the board width direction facing up and down.