JPH0431936Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a PC steel material connection device.

Prior art and its problems Connecting the ends of prestressing steel materials has traditionally been an extremely difficult task. For example, as shown in Fig. 3, one PC steel material a is fixed to an anchor head b with a male thread on the outer periphery by a wedge c, and the other PC steel material d is fixed on the outer periphery with the spiral direction reversed. It is fixed to the anchor head e, which has a male screw threaded thereon, by a compression condominium f, and both anchor heads b,
e is connected by a connecting tube g having male threads with opposite helical directions on both ends of the inner circumferential surface.

However, compression condominium f involves passing metal tubes through a die, crushing them, and attaching them to the ends of prestressed steel, which requires large equipment and space, making connection work impossible in a small space. Ta.

Means for Solving the Problems The PC steel material connecting device according to this invention has a cylindrical shape and has a connecting tube with female threads with opposite spiral directions on the inner peripheral surface of both ends, and a male thread on the outer periphery. two anchor heads that are screwed into the female threads of the connecting cylinder and are penetrated by prestressed steel material insertion holes whose diameters gradually increase from one end to the other; wedge,
A space ring located in the connecting cylinder and in contact with one anchor head, a set plate in contact with the space ring and having a set pipe insertion hole passed through it, and a set plate inserted into the set pipe insertion hole of the set plate and connected to the other anchor head. It consists of a set pipe that comes into contact with the wedge of the set pipe, and a wedge that is located on the outer periphery of the set pipe and is interposed between the set plate and the wedge.When the connecting cylinder is rotated, the left and right anchor heads are drawn together, and the wedge is placed between the set plate and the wedge. An interposed spring forces the wedge into the wedge insertion hole.

Embodiment This invention will be described in detail below based on an embodiment shown in the drawings.

In the figure, reference numeral 1 denotes a cylindrical connecting tube, and internal threads 2, 2 with opposite helical directions are respectively threaded on the inner circumferential surface of both ends.

3, 3 is the anchor head, which is cylindrical,
A male thread 4 is provided on each outer periphery. The anchor heads 3, 3 can be screwed into the female threads 2, 2 of the connecting cylinder 1, and therefore the male threads 4, 4 on the outer periphery have opposite helical directions. Anchor heads 3, 3 have PC steel insertion holes 5 parallel to the center line direction.
are penetrated multiple times. The diameter of the PC steel material insertion hole 5 gradually increases from one end to the other end.

6 is a wedge whose outer diameter gradually increases from one end to the other, and in the direction of the center line.
The PC steel material clamping hole 7 is penetrated and divided into two by a plane passing through the center line.

Reference numeral 8 denotes a space ring, which has a cylindrical shape and is housed within the connecting tube 1, so its outer diameter is formed to be approximately the same as the inner diameter of the connecting tube 1.

Reference numeral 9 denotes a set plate, which is disk-shaped and is housed in the connecting tube 1, so that its outer diameter is formed to be approximately the same as the inner diameter of the connecting tube 1. A plurality of set pipe insertion holes 10 are passed through the set plate 9.

11 is a set pipe, which is cylindrical;
A collar portion 12 is formed on the outer periphery of one end.

13 is a spring, and the set pipe 11
It is located on the outer periphery.

Reference numeral 14 is a split pin which penetrates the side surface of the end of the set pipe 11.

Next, the connection work of the PC steel materials 15, 15 using the PC steel material connection device having the above configuration will be explained.

Various materials can be connected as the PC steel materials 15, 15, such as a PC steel wire, a PC steel stranded wire, and a PC steel bar.

A PC steel material 15 is fixed to one anchor head 3. PC steel material holding hole 7 of wedge 6 with PC steel material 15
Insert the wedge 6 into the PC of the anchor head 3.
It is fitted and fixed in the steel material insertion hole 5.

A space ring 8 is brought into contact with the surface of the anchor head 3, and a set plate 9 is attached to the space ring 8.
to touch. A set pipe 11 with a spring 13 positioned on its outer periphery is inserted into a set pipe insertion hole 10 of a set plate 9 and attached to the set plate 9 with a split pin 14.

A wedge 6 is positioned in the PC steel insertion hole 5 of the other anchor head 3.

The space ring 8, set plate 9, and set pipe 11 are stored inside, and the connecting cylinder 1 is rotated to screw the anchor heads 3, 3 into the internal threads 2, 2 on the inner periphery of both ends.

When screwed together to a certain extent, insert the other steel material 15 into the PC steel material insertion hole 5 of the other anchor head 3, 3.
Insert. The steel material 15 pushes and spreads the wedge 6 against the force of the spring 13, and the prestressed steel material 15 is inserted into the prestressed steel material holding hole 7 of the wedge 6.

Further rotate the connecting cylinder 1 and attach the anchor head 3,
Pull the 3 closer together. The set plate 9 compresses the spring 13, pushes the wedge 6 into the prestressing steel material insertion hole 5 of the anchor head 3, and the wedge 6 clamps the prestressed steel material 15 to complete fixing.

Effects of the invention Since this invention has the above structure,
Insert the PC steel material into the PC steel material of the anchor head,
Reliable connection can be achieved simply by rotating the connecting tube, and the connection work can be performed extremely easily in a narrow space.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of one embodiment of this invention;
The figure is a divided perspective view thereof, and FIG. 3 is a longitudinal cross-sectional view of a conventional example. 1... Connecting tube, 2... Female thread, 3... Anchor head, 4... Male thread, 5... PC steel material insertion hole,
6... Wedge, 7... PC steel clamping hole, 8... Space ring, 9... Set plate, 10...
Set pipe insertion hole, 11...Set pipe, 1
2...Brim portion, 13...Spring, 14...Cotter pin, 15...PC steel material.

Claims (1)

[Scope of utility model registration request] A connecting tube that is cylindrical and has female threads with opposite spiral directions on the inner peripheral surface of both ends, a male screw on the outer periphery, which is screwed into the female thread of the connecting tube, and gradually increases from one end to the other end. Two anchor heads each having a prestressed steel material insertion hole with a diameter increasing in diameter, a wedge located within the prestressed steel material insertion hole of the anchor head, and a space located within the connecting cylinder and abutting one of the anchor heads. a set plate that abuts the space ring and has a set pipe insertion hole passed through it; a set pipe that is inserted through the set pipe insertion hole of the set plate and abuts the wedge of the other anchor head; Consisting of a wedge interposed between a plate and a wedge, when the connecting tube is rotated, the left and right anchor heads are drawn together, and a spring interposed between the set plate and the wedge pushes the wedge into the wedge insertion hole. A PC steel connection device characterized by: