JPS601165Y2 - Intermediate bar of separator for concrete formwork - Google Patents

Description

[Detailed explanation of the invention] This invention is based on Kodori! The end of the joint member, which can be locked and fixed to the J-t formwork, is bent into a U-shaped vertical cross section, and the pin is inserted through both parts. According to this article, regarding the intermediate bar of the concrete formwork separator connected to the India member, the purpose is to make this type of intermediate bar, which is buried in the poured concrete and cannot be reused, from as thin a material as possible. Although it is manufactured at low cost, it is possible to ensure sufficient tensile strength and compressive strength of the intermediate bar against the lateral pressure of poured concrete, and furthermore, such strength increases can be easily implemented without requiring any improvement on the joint member side. The point is to make it so.

First, an embodiment of the present invention will be described based on the drawings.

In FIG. 1, B indicates that the horizontal flat plate-shaped locking part 5 is inserted between the vertically opposing peripheral protruding plate parts 10, 10 of the vertically adjacent metal box-shaped concrete formwork C9C. In this state, the U-clips 11 are commonly inserted and locked into the holes drilled in the protruding plate parts 10° 10 and the locking part 5 at the same phase positions, respectively, to thereby be fixed to the protruding plate parts 10, 10. This joint member B is made of steel.
The inner side protrusion of the formwork C9C is formed into a bar connection part 6 having a U-shaped longitudinal section.

A is inserted into any one of the plurality of pin insertion holes 2 formed at appropriate intervals in the longitudinal direction with the end portion IA fitted into the U-shaped connection portion 6. Two and two,
Connected to the connecting part 6 by inserting the pin 9 through any one of the plurality of pin insertion holes 7 formed at appropriate intervals in the longitudinal direction of the connecting part 6. This is an intermediate bar made of steel.

Although only the left half is shown in the figure because it is symmetrical, the separator S is composed of an intermediate bar A and a pair of joint members B, B.

The intermediate bar A has a large number of pin insertion holes 2 at predetermined equal intervals throughout its length, including the end portion IA.
2... is formed.

The distance between the adjacent holes 2, 2 of the intermediate bar A is configured to be larger than the distance between the adjacent holes 7, 7 of the connecting portion 6 (the former intermediate bar A
is about 15 mm, and the latter connection part 6 is about i.

rrrIrL), fine adjustment of separator S length is 5771
It is effective with a width of 771.

In the structure of this embodiment, as shown in FIGS. 2 and 3, the holes 2 in the intermediate bar A are formed into cylinders on one side of the band-shaped bar member 1 by burring. The cylindrical portion 3 is integrally stamped and formed inside the cylindrical portion 3, and the lower end and upper end in the width direction of the bar member 1 are provided with: The protrusion amount t2. of the cylindrical portion 3 is smaller than the protrusion amount t2. The cylindrical portion 3 in a state with t2
・Bar connection part 6 of the joint member B on the protrusion direction side
A reinforcing portion 4A and a reinforcing piece 4B having curved surfaces that follow the inner shape of the U-shaped bottom are bent and protruded.

The protrusion amount t1 of the cylindrical portion 3 is the distance t between the opposing inner surfaces of the connecting portion 6.

The one end portion IA of the bar is tightly fitted into the connecting portion 6.

Due to the presence of the reinforcing portion 4A and the reinforcing piece 4B, a concrete placement space S is created.

The strength of the intermediate bar A is ensured against the tensile force acting on the intermediate bar A as a result of the lateral pressure of the concrete cast acting on the formwork C.

During the burring process around the hole 2, the presence of the cylindrical portion 3 prevents both the peripheral edge of the hole 2 from cracking and breaking due to the pin 9 and the pin 9 being sheared by the peripheral edge of the hole 2. This is prevented by reducing the pressure per unit area of the tensile force that acts between .

Since the one end portion 1A of the bar is in close contact with the connecting portion 6 and does not wobble, a sufficiently strong connection is achieved.

FIG. 4 shows an upper reinforcing piece 4 of the bar member 1 according to another embodiment.
The bending strength of the intermediate bar A' (7) is further strengthened by bending B once to the side opposite to the cylindrical portion 3 and then folding it back toward the cylindrical portion 3 side.

FIG. 5 shows a modification of the joint member B, in which the hole 7 is
Like the hole 2 of the intermediate bar A, it is formed by punching out the cylindrical portion 3, and cracks and breakage of the peripheral edges of both holes 7 and 2 and shearing of the pin 9 can be more reliably prevented.

Although the embodiments have been described above, the gist of the intermediate bar of the concrete formwork separator according to the present invention is that the intermediate bar is arranged at equal intervals throughout its longitudinal direction, including the end portion IA that is fitted into the U-shaped connecting portion 6. A pin insertion hole 2 is formed in the pin insertion hole 2, and the reinforcing piece 4B is formed by bending the upper edge of the bar member 1 in the width direction over its entire length to one side by a small width, and the lower side is also formed over the entire length into the joint. The reinforcing portion 4A is bent into a curved surface that follows the inner surface shape of the U-shaped bottom of the bar connecting portion 6 of the member B, and the reinforcing piece 4B and the reinforcing portion 4A are provided. As a result, the main part is in the vertical direction and the bridge is fixed and connected in a vertical position with respect to the bar connection part 6, so the strength in the vertical direction, where the most load is applied, is extremely strong. Since the reinforcement part 4A formed below can reliably transmit the load to the joint member B, it is possible to prevent the load from being concentrated on the pin 9, and prevent cracks and breakage at the peripheral edge of the pin 2. It can reliably prevent the pin 9 from shearing, and it also has sufficient resistance against lateral pressure from poured concrete, so it has sufficiently large connection strength in both tensile and compression resistance. The lateral pressure traction action against concrete can be strongly, reliably, and well exerted as expected.

Furthermore, there is no need to specially modify the bar connection portion 6 on the side of the joint member B, and therefore, the above-mentioned strength increase can be easily implemented.

[Brief explanation of drawings]

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 partially cutaway side view, and FIG.
The figure is an enlarged side view of a main part, FIG. 3 is a longitudinal sectional front view, and FIGS. 4 and 5 are longitudinal sectional front views of different embodiments. 1...Bun part, 1A...End part, 2
...Pin insertion hole, 3...Cylindrical part, 4
A...Reinforcement part, 4B...Reinforcement piece, 6.
...Bar connection part, 9...Pin, B...
...Joint member, C...Concrete formwork.

Claims (1)

[Scope of utility model registration request] The joint member B, which can be locked and fixed to the concrete formwork C, has a U-shaped vertical cross section: with its end portion 1A inserted into the bent bar connection portion 6, the joint member B is inserted between the two. An intermediate bar of the concrete formwork is connected to the joint member B by inserting a pin 9 therethrough, and the intermediate bar A is connected to the end portion 1A that is fitted into the U-shaped connection part 6. The pin insertion holes 2 are formed at regular intervals along the entire length of the bar member 1, and the upper edge of the bar member 1 in the width direction is bent a small amount to one side along the entire length. A concrete mold which is bent to form a reinforcing piece 4B, and a reinforcing part 4A is also formed on the lower side along the entire length into a curved surface that follows the inner shape of the U-shaped bottom of the bar connection part 6 of the joint member B. Intermediate bar of frame separator