JPH06136949A - Fastening device for form panel - Google Patents

Abstract

PURPOSE:To nip a concrete form panel from both sides by using a fastening device having a first fastening tool having a wedge for holding a rod and a second fastening tool for fastening the rod by a cam mechanism. CONSTITUTION:A fastening device C is formed of a pipe 1; a cone 2 inserted to both end parts thereof, a rod 3 inserted between the both in such a manner as to be attachable and removable; a first fastening tool 4 inserted to one end part of the rod 2; and a second fastening tool 5 inserted to the other end part. The rod 3 is inserted to the pipe 1 and the cone 2 installed between two form panels B, and the end part of the rod 3 is passed through the socket 10 of the second fastening tool 5 and fixed by a cam mechanism. The rod 3 extending through the first fastening tool 4 is fixed by a wedge 8 driven into a frame body 8 in the state where the other end of the rod 3 is pulled by a jig, and the two form panels B are fastened and nipped by the flat plates 6, 9 of the first and second fastening tools 4, 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a formwork for sandwiching and tightening formwork panels that support concrete that has been placed when building a body such as walls, beams, floors, and pillars in construction and civil engineering. Panel tightening device.

[0002]

2. Description of the Related Art As a tightening device of this type of form panel, for example, the one disclosed in Japanese Utility Model Publication No. 62-29545 is known.

In this device, a pipe and a cone are arranged between two form panels, a threaded rod is inserted into the pipe and the cone as a separator, and a tightening rod having a screw carved on both sides of the rod is connected. Then, the outside of the tightening rod is attached by tightening the pipe-shaped vertical end thick material and horizontal end thick material, the washer and the nut.

[0004]

However, the above-mentioned tightening device has the following problems.

(1) Since the number of parts is large, the mounting and disassembling work thereof is troublesome, and the processing is difficult, the economy and workability are poor.

(2) Further, since the separator and the tightening rod are provided with screws, the processing is difficult and the cost is high.

(3) Since the separator cuts its length each time according to the width and height of the skeleton, the cutting work is troublesome, and if this is buried, the material is wasted and the cost is increased.

(4) In tightening, since the nut is rotated through a tool such as a spanner, its operating force is large, and it is difficult to assemble and disassemble.

Therefore, the object of the present invention is to reduce the number of parts, to facilitate the work of assembly and disassembly, and to improve the workability,
It is an object of the present invention to provide a formwork panel tightening device which eliminates waste of material and is simple and easy for tightening and dismantling operations.

[0010]

In order to achieve the above object, the structure of the present invention is such that form panels are arranged on both sides of a body to be formed, and the form panels are mounted between the two form panels. In a tightening device of a form panel for tightening a frame panel, a pipe, a cone inserted into both ends of the pipe, a rod detachably inserted into the pipe and the cone, and one end of the rod are inserted. It consists of a first fastening tool and a second fastening tool inserted into the other end of the rod. The first fastening tool is a flat plate, a hollow frame body fixed to the back surface of the flat plate, and The wedge is inserted in a direction orthogonal to the rod, the second tightening tool is a flat plate,
It is characterized by comprising a socket fixed to the back surface of the flat plate, and a cam mechanism rotatably supported by the socket and tightening the rod.

[0011]

The rod is inserted into the pipe and cone mounted between the two form panels, the end of the rod passing through the socket of the second tightening tool, which is then fixed by the cam mechanism.

Next, the other end of the rod is pulled by a jig or manually, and in this state, the rod penetrating the first tightening tool is fixed with a wedge driven into the frame body, and the first and second tightening tools are fixed. Tighten the two formwork panels with a flat plate.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 5 shows a formwork device using the tightening device of the present invention.

Form panel panels B and B made of steel plates are arranged on both sides of a frame A such as walls, beams and columns, and the form panel panels B and B are fastened from both sides via a tightening device C.

A mounting bracket 20 is provided on the back of the form panels B and B.
Is connected to the scaffolding frame D via braces 21 and the like.

Therefore, the form panels B, B are assembled at the same time as the scaffolding frame D, and are lifted or hung by, for example, a crane or the like and transferred to the molding position of the skeleton.

A ladder F is provided on the scaffolding frame D, and a scaffolding is mounted above the scaffolding frame D. Placing concrete on the scaffolding,
Perform other necessary construction and civil engineering work.

The tightening device C is, as shown in FIG.
And a cone 2 inserted into both ends of the pipe 1, and a rod 3 detachably inserted into the pipe 1 and the cone 2.
And a first tightening tool 4 inserted into one end of the rod 3 having a round bar shape, and a second tightening tool 5 inserted into the other end of the rod 3.

As shown in FIGS. 3 and 4, the first tightening tool 4 includes a flat plate 6, a vertically hollow frame body 6 fixed to the back surface of the flat plate 6, and a rod 3 in the frame body 6. The wedge 8 is inserted from above in the orthogonal direction.

As shown in FIGS. 1 and 2, the second tightening tool 5 is a flat plate 9 and a socket 10 fixed to the back surface of the flat plate 9.
And a cam mechanism 11 that is rotatably supported by the socket 10 and tightens the rod 3.

The frame 7 of the first tightening tool 4 is composed of a lateral hole 7a into which the rod 3 is inserted and a wedge insertion hole 12 which is formed so as to penetrate in the direction orthogonal to the rod 3.
A spacer 22 is provided on the inner periphery of the spacer 13, and a saw tooth 13 facing the rod 3 is formed on the spacer, and a plurality of step teeth 14 facing the rod 3 are formed on the end surface of the wedge S. .

The socket 10 of the second tightening tool 5 has an opening 15 for inserting the rod 3, a reinforcing rib 22, and a shaft 2.
3, 24, and the opening 15 is open downward.

The cam mechanism 11 includes a cam body 16 rotatably supported by a shaft 23 of the socket 10, and a plurality of teeth 1 formed on the cam surface of the cam body 16 and contacting the outer surface of the rod 3.
7, a lever 18 protruding from the cam body 16, and a spring 19 that is installed between the lever 18 and the shaft 24 on the socket 10 side and biases the cam body 16 in the rotational direction.

The socket 2 is composed of a cylindrical portion 25 and a trumpet type supporting portion 26 integrally provided at the end of the cylindrical portion 25, and the end surface of the supporting portion 26 is in contact with the inner surface of the form panel B.

However, as shown in FIG. 6, the socket 2 may have cylindrical portions 25 and 25a projecting from both sides of the trumpet type supporting portion 26, and one cylindrical portion 25a may be inserted into the hole 27 of the form panel B. .

In this case, the pipe 1 and the socket 2 are stably held, and the rod 3 can be easily attached and detached, which is smooth.

The tightening operation is performed as follows.

A rod 3 of an arbitrary length is inserted into the pipe and the socket 2, and one end of this rod 3, for example, the right end in FIG. 3, is inserted into the socket 10 of the second tightening tool 5.

At this time, the rod 3 is temporarily fixed by the teeth 17 of the cam body 16 urged by the spring 19, and the lever 1
When the cam body 16 is further rotated in the tightening direction via 8, the cam surface strongly presses the rod 3, and the teeth 17 are further tightened so that they cannot be pulled out.

The rod 3 inserted in the hole 7a of the first tightening tool 4 is strongly clamped by the teeth 13 and 14 so as not to come off when the wedge 8 is driven from above, as shown in FIG. Is.

Therefore, first, the other end of the rod 3 is inserted into the threaded rod 29 of the jig 28, strongly held by the teeth 31 of the cam-shaped lever 30, and pulled through the jig 28.

At this time, the flat plate 9 of the second tightening tool 5 contacts the outer surface of the one mold panel B.

Further, the shoe 33 of the collar 32 of the jig 28 is inserted into the frame 6 of the first tightening tool 4, and the nut 35 screwed to the threaded rod 29 is rotated by a tool 34 such as Shino.
When the collar 32 is strongly pushed in, the flat plate 6 of the first tightening tool 4 is pressed against the outer surface of the other mold panel B by the reaction.
The two form panels B, B are clamped and held between the flat plates 6, 9 on both sides.

By driving the wedge 8 in this state, the flat plate 6 is fixed and strongly tightened at the position where it is tightened with respect to the rod 3.

[0036]

The present invention has the following effects.

1) Since the rod penetrates the pipe, the socket, and the first and second fastening members, it is possible to pull out after the body is molded, and it is related to the size of the body, that is, the width and height. Material can be saved because the length can be set without any effort, its processing is easy, and it is not buried.

Furthermore, since the rod is formed of a round bar,
Since the process of engraving the screws is not required, the processing cost can be reduced.

2) Since the first tightening tool is provided with a wedge, and the rod is held by this wedge, the tightening work can be performed by driving the wedge, and the hammering operation is easy and the operability is good. .

Further, by gradually driving the wedge, the tightening force is improved and fine adjustment is easy.

3) Since the second tightening tool is tightened by the cam mechanism, the rod can be tightened by rotating the cam, and the tightening operation is easy.

Moreover, since the cam mechanism is provided with the cam body biased by the spring, the tightening is automatically performed to improve the operability and speed up.

4) Since the pipe, the cone, the rod, and the first and second fasteners are only used, the number of parts is smaller than that of the conventional one, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a tightening device of the present invention.

2 is a cross-sectional plan view of FIG.

FIG. 3 is a perspective view of a first tightening tool.

FIG. 4 is a cross-sectional plan view of the first fastener.

FIG. 5 is a partially cutaway perspective view of a mold incorporating the tightening device of the present invention.

FIG. 6 is a sectional view of a socket according to another embodiment.

[Explanation of symbols]

 1 Pipe 2 Cone 3 Rod 4 First Tightening Tool 5 Second Tightening Tool 6 Flat Plate 7 Frame 7a Hole 8 Wedge 9 Flat Plate 10 Socket 11 Cam Mechanism 12 Wedge Insertion Hole 13 Sawtooth Tooth 14 Stepped Tooth 15 Opening Part 16 Cam body 17 Teeth 18 Lever 19 Spring A Body B Frame panel C Fastening device

Claims (3)

[Claims] 1. A tightening device for a form panel in which form panels are provided on both sides of a body to be formed and which is mounted between two form panels to tighten the two form panels, a pipe and a pipe. A cone inserted into both ends of the rod, a rod detachably inserted into the pipe and the cone, a first tightening tool inserted into one end of the rod, and a first fastener inserted into the other end of the rod. The first tightening tool includes a flat plate, a hollow frame body fixed to the back surface of the flat plate, and a wedge inserted in the frame body in a direction orthogonal to the rod. A clamping device for a formwork panel, wherein the tightening tool comprises a flat plate, a socket fixed to the back surface of the flat plate, and a cam mechanism rotatably supported by the socket to tighten the rod. 2. The frame of the first tightening tool comprises a hole into which a rod is inserted and a wedge insertion hole formed in a direction orthogonal to the rod, and a saw-like shape facing the rod is formed on the inner periphery of the frame. The mold frame panel tightening device according to claim 1, wherein a plurality of stepped teeth are formed on the end surface of the wedge so as to face the rod. 3. The socket of the second tightening tool has an opening into which the rod is inserted, and the cam mechanism has a cam body rotatably supported by the socket, and an outer surface of the rod carved on the cam surface of the cam body. 2. A tightening device for a form panel according to claim 1, further comprising: a plurality of teeth abutting against the cam body, a lever projecting from the cam body, and a spring installed between the lever and the socket to bias the cam body in the rotational direction. .