JP2506842Y2 - Form tightening device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork tightening device used for supporting concrete placed in construction and civil engineering to form a skeleton.

[0002]

2. Description of the Related Art A conventional tightening device for mold frame panels of this type is disclosed, for example, in Japanese Utility Model Publication No. 1-39314.

This consists of a pipe, a threaded rod inserted into the pipe, a cone provided at the end of the threaded rod, and a nut screwed to the other end of the threaded rod.

[0004]

In the above-described conventional tightening device, since the threaded rod is engraved with threads on the entire circumference, when concrete adheres to this thread and solidifies, the concrete bites, The peeling work is very difficult.

Further, for tightening, the bolt is rotated by a spanner, but when there is no spanner, the tightening is difficult.

[0006] Therefore, an object of the present invention is to provide a tightening device in which concrete adhered to a screw rod can be easily peeled off and can be tightened with other tools such as Shino without a spanner.

[0007]

In order to achieve the above-mentioned object, the structure of the present invention is such that form frame panels are arranged on both sides of the body,
In a tightening device of a form that penetrates between two form panels and tightens the form panel, a pipe, a cone detachably inserted at both ends of the pipe, a pipe and a screw rod inserted in each cone. , Consisting of washers inserted on both sides of the threaded rod and nuts screwed to both ends of the threaded rod outside the washer, the threaded rod having an oval-shaped main body,
It is characterized in that smooth surfaces are formed above and below the outer circumference of the main body, and threads are formed on the left and right of the outer circumference.

[0008]

The threaded rod inserted between the formwork panels via the pipe and the cone is tightened from both sides by nuts, and the formwork panels are held by the nuts.

[0009]

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

As shown in FIG. 3, formwork panels 2 and 2 are arranged on both sides of a building frame, a frame or the like of a building, or a frame 1 of a wall such as a tunnel, and the backs of the formwork panels 2 and 2 are horizontal members. Alternatively, it is coupled to the scaffolding frame 4 via a brace 3 made of a diagonal material.

The formwork panels 2 and 2 are arranged at the same time when the scaffolding frame 4 is installed, and the scaffolding frame 4 is used to form the formwork panels 2 and 2.
Assemble and disassemble.

A scaffolding board and a handrail are provided above the scaffolding frame 4 so that the scaffolding board can be used for placing concrete, assembling and disassembling forms such as floors and ceilings above.

The formwork panels 2 and 2 are pressed by the scaffolding frame 4 from both sides to support the load from the concrete and maintain the standing state of the formwork panels 2 and 2. , 2 is used to tighten the fastening device 5 of the present invention.

As shown in FIG. 1, the tightening device 5 has a central pipe 6, cones 7 and 7 detachably inserted into both ends of the pipe 6, and the pipe 6 and the cones 7 and 7 inserted therein. It is composed of a threaded rod 8 and washers 9, 9 inserted on both sides of the threaded rod 8 and nuts 10, 10 screwed to both ends of the threaded rod 8 on the outside of the washers 9, 9.

As shown in FIG. 3, the threaded rod 8 is provided with an elongated main body 11 having an elliptical cross section, and is formed with smooth surfaces 12 and 12 which are substantially horizontal along the axial direction above and below the outer circumference of the main body 11, and likewise, A large number of threads 13, 13 are formed on the left and right.

The pipe 6 is made of a hard material such as plastics and has a number of small anti-slip projections formed on its outer circumference.

The cone 7 is formed of a hard material such as plastics, and comprises a cylindrical portion 15 having a plurality of slits 14 formed in the axial direction and a trumpet-shaped hollow support portion 16 provided at the end of the cylindrical portion. Therefore, a reinforcing rib 17 having a trapezoidal cross section is provided in the support portion 16.

The nut 10 is composed of an outer cylindrical portion 18 having an inner circumference provided with a screw, and a hollow flange 19 integrally provided at the inner end of the cylindrical portion. A plurality of tool hooking projections 20 for hooking a tool for rotation driving are provided.

A pipe 6 and cones 7 and 7 are arranged between two opposing formwork panels 2 and 2, and a screw rod 8 is provided at the center thereof.
The cone-shaped supporting parts 16, 16 of the cones 7, 7.
The end surface of the is contacted with the inner surface of each form panel 2,2.

Next, the nut 1 is inserted through the washers 9, 9.
0 and 10 are screwed into both ends of the screw rod 8 and the washers 9 and 9 are attached.
Through the inner surface of the flanges 19 and 19 to the respective formwork panels 2,
Abut the outer surface of 2.

Further, while the tool is hooked on the projection 20, the nut 10 is rotated and tightened, and each formwork panel 2, 2 is sandwiched by the nuts 10, 10 from both sides, and concrete is poured between each formwork panel 2, 2. Set up.

When the concrete hardens, the nut 10,
Loosen 10 and remove it, and then remove washers 9, 9 and each form panel 2, 2 from the molded body.

At this time, the threaded rod 8 can be pulled out, but the pipe 6 and the cones 7, 7 are buried and left in the body.

However, the cones 7 and 7 may be removed from the outer surface of the skeleton, and the subsequent finishing may be performed.

FIG. 4 shows another embodiment of the cone of the present invention.

The slits 14 are formed on both sides of the support portion 16,
The cylindrical portions 15 and 15a forming 14 are horizontally provided, and the one cylindrical portion 15a is provided with the holes 2 of the formwork panels 2 and 2.
The cones 7 and 7 are stably inserted into the rods 1 and 21, and the screw rod 8 is easily inserted.

[0027]

According to the present invention, the following effects can be obtained.

1) Since the threaded rod has a smooth surface above and below the outer periphery of the main body, even if concrete adheres to the outer surface of the threaded rod, it is easy to rub the concrete on this smooth surface. Concrete can be easily removed. That is,
The outer circumference of the threaded rod is covered with a pipe, a cone and a nut, but in many cases there is a slight gap between the pipe and the cone and between the cone and the formwork panel. The end usually projects outward from the outer end surface of the nut.When concrete is placed, this concrete enters through the gap and adheres to the outer circumference of the screw rod, or scatters when placing concrete. There is a case where a part of the concrete that adheres adheres to a part of the screw rod that protrudes outward from the nut, but according to the present invention, it is very easy and easy to peel off the concrete that adheres partly. It is something.

2) Since the nut is provided with a projection for hooking a tool on the back surface of the flange, not only a spanner but also a tool such as a chisel inserted between the projections can be tightened.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a state in which a tightening device according to the present invention is arranged on a mold panel.

FIG. 2 is a cross-sectional view of a screw rod.

FIG. 3 is a partially cutaway perspective view showing a state in which the tightening device according to the present invention is assembled to a formwork panel and the formwork panel is coupled to a scaffolding frame.

FIG. 4 is a perspective view of a cone according to another embodiment.

[Explanation of symbols]

 1 frame 2 formwork panel 6 pipe 7 cone 8 screw rod 9 washer 10 nut 11 body 12 smooth surface 13 screw thread 14 slit 15 cylindrical portion 16 support portion 17 rib

Claims (5)

(57) [Scope of utility model registration request] Claim: What is claimed is: 1. A mold tightening device in which mold panels are arranged on both sides of a frame, and the mold panels are tightened by penetrating between the two mold panels. A cone, a pipe, a threaded rod inserted into each cone, washers inserted on both sides of the threaded rod, and nuts screwed to both ends of the threaded rod outside the washer. A mold clamping device comprising a main body having an elliptical cross section, a smooth surface being formed above and below the outer periphery of the main body, and threads being formed on the left and right sides of the outer periphery. 2. The mold clamping device according to claim 1, wherein a large number of small anti-slip projections are formed on the outer circumference of the pipe. 3. A cone comprises a cylindrical portion having a plurality of slits provided in the axial direction and a trumpet-shaped hollow supporting portion provided at an end of the cylindrical portion, and a reinforcing rib having a trapezoidal cross section is provided in the supporting portion. The tightening device for the mold according to claim 1. 4. The mold clamping device according to claim 1, wherein the cone comprises a trumpet-shaped hollow support portion and cylindrical portions provided on both sides of the support portion. 5. A tubular portion in which a nut is engraved with a screw on the inner periphery,
It consists of a hollow flange integrally provided at the end of the tube,
The mold clamping device according to claim 1, wherein a plurality of tool hooking projections are provided on the back surface of the flange.