JPH0720277Y2 - Beam separator retaining device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention has a simple structure of a beam separator for determining a space between vertically-arranged formworks facing each other in a beam portion of a concrete building. According to the present invention, the present invention relates to a beam separator retaining device for mounting the beam separator so as not to come off from the hook.

[Conventional technology]

Unlike a formwork installed on a wall, etc., a formwork installed vertically on the part of a concrete building that is to be a beam is equipped with beam separator hooks on the inner surface of the formwork, and both ends of the beam separator are attached. Hook this beam separator hook,
The intervals between the molds facing each other are determined, and the molds are prevented from being bent outward and deformed by the concrete pressure applied.

A structure shown in FIG. 10 is known as a structure for preventing the conventional beam separator having such a structure from being pulled out.

In the beam separator S, both ends of a steel rod are bent at substantially right angles, and a male screw 2 is formed on the bent portion 1. The beam separator hook A'is a thick plate-shaped main body 3
A through hole 4'for inserting the bent portion 1 of the beam separator S is provided in the main body 3, and the main body 3 is integrally provided with the collar portion 5 and the male screw rod 6. The male screw rod 6 of the beam separator hook A'is inserted into the hole 8 provided in the mold 7, and the male screw rod 6 and the pull rod 9 are screwed together on the outside of the mold 7 to form the beam separator hook. A'is attached to the inner surface of the mold 7.

Then, an operator riding on the formwork for forming the ceiling surface inserts the bent portion 1 of the beam separator S into the insertion hole 4'of the beam separator hook A'from above and thereafter. In order to prevent the beam separator S from coming off, the nut 11 is screwed into the male screw 2 formed in the bent portion 1. However, this work of screwing in the nut 11 is not only time-consuming, but also the worker who is riding on the formwork for forming the ceiling surface bends his knees in a cramped position and pierces his hands deeply. Since it had to be done, it was also an extremely difficult task.

In this way, after assembling the formwork, concrete is placed, and then the vibrator is inserted into the placed concrete, so that the concrete is filled without gaps between the formwork and no voids occur. I am trying. Therefore, unless the beam separator S is prevented from being pulled out by some method, the beam separator hook A'is caused by the flow of concrete due to vibration or the placing pressure of concrete.
The beam separator S that is hooked on the wall will come out.

[Problems to be solved by the device]

In view of the above-mentioned circumstances, the present invention achieves retaining of a beam separator having bent portions at both ends by a simple means, thereby improving workability for attaching the beam separator, The purpose was to enable quick construction.

[Means for Solving the Problems]

Means adopted by the present invention to solve the above-mentioned problems are that a part which is inserted into an insertion hole provided in the main body of a beam separator hook and cannot be pulled out, and which projects downward from the lower surface of the main body is elastic. Using the cylindrical beam separator retainer that is a deformable elastic tongue, use the beam separator hooks attached to the inner surface of the formwork to fold the ends of the beam separator. That is, the bent portion is hooked.

[Function of device]

When the cylindrical beam separator retainer is strongly pressed from above into the insertion hole provided in the main body of the beam separator hook, the elastic tongue provided in the lower half of this beam separator retainer is elastically deformed. When the lower half of the beam separator retainer passes through the insertion hole of the beam separator hook, the elastic tongue that had been reduced in diameter is restored to its original shape, and the beam separator hook is The beam separator retainer is inserted into the insertion hole of and cannot be removed.

Then, when the bent portions at both ends of the beam separator are strongly pressed from above, into the insertion holes of the tubular beam separator retaining device that is inserted into the insertion holes of the beam separator hooks.
The elastic tongue of the beam separator stopper which projects downward from the lower surface of the beam separator hook is expanded by elastic deformation and is hooked on the hooking portion provided at the bent portion of the beam separator.

As a result, the beam separator is prevented from coming out upward, so that the workability for mounting the beam separator is significantly improved as compared with the conventional structure using a nut.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to examples.
The same parts as those described in the section “Prior Art” will be described using the same reference numerals.

FIG. 1 is a side view of a formwork attached to a beam portion, in which formworks 7 provided facing each other at a predetermined interval are connected by a beam separator S, whereby the space between them is increased. In addition, the mold 7 is prevented from being bent outward and deformed by the pressure of the concrete.

A beam separator hook A is attached to the inner surface of the mold 7. This beam separator hook A is the first
As shown in FIGS. 6 and 6, the collar portion 5 is in contact with the inner surface of the mold 7 and is pulled by a pull rod 9 on the outer side of the mold 7. The pull rod 9 is a square pipe. 12 and L-shaped contact plate 13 and wedge body 14 form frame 7
It is fixed so that it cannot move inside. In FIG. 1, 15 is a frame provided below the beam portion, 16 is a frame provided in the ceiling surface portion, 17
Indicates a reinforcing bar arranged in a beam portion.

And, the present invention relates to the main body 3 of the beam separator hook A.
It is characterized in that a cylindrical beam separator retaining device B is fitted into the insertion hole 4 provided in the up and down direction in a non-removable manner, and thereby the beam separator S is retained.

This beam separator stopper B is a resin molded product and has a cylindrical main body as shown in FIGS. 2 and 5.
A brim portion 19 is provided on the upper end portion of 18 and a lower end portion of the main body 18 is formed in an inverted truncated cone shape. By forming several kerfs 20 in the vertical direction between the central portion and the lower end of the main body 18, the lower half portion of the main body 18 is divided into a plurality along the circumferential direction, and the elastic tongue piece 21 is formed. Has become. At the lower end of the elastic tongue piece 21, a claw piece 22 is provided inward.

In order to insert the beam separator pull-out stopper B into the insertion hole 4 of the beam separator hook A, the inner diameter of the insertion hole 14 of the beam separator hook A is set to the above-mentioned conventional beam separator hook A '. Is larger than the inner diameter of the insertion hole 4 '.

Then, as shown in FIG. 2, when the beam separator retainer B is strongly pushed from above into the insertion hole 4 provided in the main body 3 of the beam separator hook A, the beam separator retainer B is provided on the beam separator retainer B. The elastic tongue 21 is elastically deformed, and the inverted frusto-conical portion of the lower end portion of the elastic tongue 21 is reduced in diameter, whereby the inverted frusto-conical portion of the lower end portion of the beam separator retaining device B is inserted. After passing through the hole 4, the reduced truncated conical portion restores its original shape, and as shown in FIGS. 3 and 7, the beam separator is inserted into the insertion hole 4 of the beam separator hooking tool A. The stopper B is inserted so that it cannot be pulled out.

Then, the insertion hole 23 of the cylindrical beam separator pullout stopper B inserted into the insertion hole 4 of the beam separator hooking tool A is inserted.
When the bent portions 1 at both ends of the beam separator S are strongly pushed in from above, the elastic tongue pieces of the beam separator pullout stopper B projecting downward from the lower surface of the beam separator hook A.
The diameter of 21 is expanded by elastic deformation, and the claw piece 22 of the elastic tongue piece 21 is caught on the thread of the male screw 2 provided in the bent portion 1 of the beam separator S (FIGS. 4, 6, 8). See figure). As a result, the bent portion 1 of the beam separator S cannot be pulled out from the beam separator hooking device A.

Therefore, the beam separator S will not come out of the beam separator hook A even when the concrete is poured or the concrete poured by vibration is made to flow to eliminate the voids. Can be performed without any trouble.

Further, as shown in FIG. 9, annular grooves 24 are provided at a constant pitch on the outer periphery of the bent portion 1 of the beam separator S, and the elastic tongue pieces 21 of the beam separator pullout stopper B are hooked on the annular groove 24. It may be configured as follows.

The structure of the beam separator retainer B is not limited to that described above, and in short, the beam separator hook A
The elastic tongue 21 is elastically deformed by inserting the bent portion 1 of the beam separator S into the insertion hole 23 of the beam separator S so that it cannot be pulled out.
The beam separator S may have any shape as long as the beam separator S is prevented from coming off by being caught by the catching portion provided in the bent portion 1.

[Advantage of the Invention] The present invention is an elastic tongue piece which is non-removably inserted into an insertion hole provided in a main body of a beam separator hook, and whose portion protruding downward from the lower surface of the main body is elastically deformable. Use a cylindrical beam separator retainer that has become a non-detachable insert into the insertion hole of the beam separator hook, and insert it into the insertion hole of this beam separator retainer. The simple operation of pressing the bent parts at both ends of the beam separator firmly from above ensures that the beam separator will not be pulled out.Therefore, the workability for installing the beam separator will be significantly improved, and It is possible to quickly assemble the part formwork.

Also, in place of the nut that has been used conventionally, only by using a tubular beam separator removal stopper, other members can be carried out using the conventional one as it is,
It can be implemented at low cost, and the degree of improvement in work efficiency relative to implementation cost is large.

[Brief description of drawings]

1 to 9 are views for explaining the present invention. FIG. 1 is a side view of a mold attached to a beam portion, and FIG. 2 is a beam separator hooking tool A. 3 is a perspective view before insertion of the beam separator retaining device B and the beam separator retaining device B. FIG. 3 is a perspective view of the beam separator retaining device B inserted into the insertion hole 4 of the beam separator hooking device A, FIG. Is a perspective view of the beam separator hook H being hooked with the beam separator S, FIG. 5 is a cutaway perspective view of the beam separator stopper B, and FIG. 6 is a beam separator hook A FIG. 7 is a longitudinal sectional view showing a state where the separator S is hooked, and FIG. 7 is a transverse sectional view showing a state where the beam separator pullout stopper B is inserted into the insertion hole 4 of the beam separator hooking device A. X- in Figure 6
X-ray sectional view, FIG. 9 is a sectional view of the beam separator S in which the annular groove 24 is provided on the outer periphery of the bent portion 1 in a retaining state. FIG. 10 is a vertical cross-sectional view for explaining a conventional retaining structure for the beam separator S. The description of the reference numerals of the main parts constituting the present invention is as follows. A: Beam separator hooking device B: Beam separator retainer S: Beam separator 1: Bent part of the beam separator 2: Male screw provided at the bent part (hooking part) 3: Main body of the beam separator hooking device 4: Insertion hole provided in the body of the beam separator hook 7: Formwork, 21: Elastic tongue 24: Annular groove (hooking part) provided in the bent part of the beam separator

Claims (1)

[Scope of utility model registration request] 1. A beam separator in which both ends of a steel rod are bent at a substantially right angle, and an uneven catching portion is formed on the outer peripheral surface of the bent portion, and the beam separator is inserted into a thick plate-shaped main body. A hole is provided in the up-down direction, and a beam separator hook is attached to the inner surface of the mold, and an insertion hole provided in the main body of the beam separator hook is non-removably inserted into the main body. A cylindrical beam separator retainer that has elastic tongues that project elastically below the lower surface of the Attach the beam separator hook to the inner surface of the, and insert the beam separator retainer into the through hole provided in the main body of the beam separator hook, into the through hole of the beam separator retainer. Bending tool for beam separator The elastic tongue provided on the beam separator retainer is elastically deformed by pushing it in from the opposite direction, and the elastic tongue is hooked on the catch provided on the bent part of the beam separator to prevent the beam separator from coming off. A device for preventing the separation of a beam separator, which is characterized in that