JPH0723459Y2 - Tensioning device for complex grip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tensioning device for a compression grip for fixing an end portion of a PC steel material.

[Prior art]

To fix the end of PC steel material, cover the end of PC steel material with a sleeve, pass the sleeve through a die with a smaller diameter for crimping, and compress the PC steel material by plastic deformation of the sleeve to compress the compression grip. Install. This compression grip is locked to the bearing plate to fix the PC steel material.

When connecting this PC steel material with tension or other PC steel materials,
A means for gripping the compression grip is required. For this purpose, a male screw is screwed on the outer circumference of the grip and a pull rod with a female screw is screwed on the inner circumference to tighten the cylinder, or a sleeve is screwed to connect with other PC steel. Was.

[Problems to be solved by the invention]

However, a problem in such a device is the difficulty of screwing a male screw around the grip. That is, it is a difficult task to rotate a compression grip attached with a long PC steel material to screw a screw, and it is expensive to rotate the processing machine and cut the screw to a fixed grip. There is a problem of making things.

[Means for solving problems]

This invention is a bottom wall in which a male screw is screwed on the outer peripheral surface over the entire length, and a PC steel material insertion hole is formed at one end, and a cylindrical shape in which a PC steel material is fixed to the end portion adjacent to this bottom wall. It has an intermediate part for inserting and accommodating a compression grip, and a cylindrical connector having an internal thread on the inner peripheral surface of the opening on the other end, and a screw which is screwed into the internal thread and has a length slightly less than twice that of the internal thread. Cylindrical coupling tool with external threads screwed on the outer peripheral surface, and female thread of the same length on the inner peripheral surface as the connecting tool that engages with the male thread of the connection tool on one side, and PC on the other side. Combining with a long connecting part that has a storage part for inserting and storing a cylindrical compression grip that has a bottom wall with a steel insertion hole and is adjacent to the bottom wall and has PC steel fixed at the end Thus, the tensioning devices of the compression grip can be connected to each other.

〔Example〕

The present invention will be described in detail based on an embodiment shown in the drawings.

In the figure, reference numeral 1 is a PC steel material, and a cylindrical steel sleeve is pressure-bonded to an end portion of the PC steel material as a compression grip 2.

As the PC steel material 1, a PC steel rod, a PC steel twisted wire or the like can be used.

The compression grip 2 is obtained by plastically deforming a steel sleeve through a die having a smaller diameter and crimping and fixing it to the end of the PC steel material 1. The compression grip 2 is housed in the connector 3.

The connector 3 is a cylindrical member made of steel, and has a bottom wall 4 provided at one end, and a PC steel material insertion hole 5 is provided in the bottom wall 4. A male screw 6 is screwed on the outer peripheral surface of the connector 3 over the entire length, and a female screw 7 is screwed on the inner peripheral surface at the end opposite to the bottom wall 4.

The PC steel material 1 is inserted into the PC steel material insertion hole 5 of the connecting tool 3, and the compression grip 2 fixed to the end of the connecting tool 3 is fitted and housed inside the connecting tool 3 adjacent to the bottom wall 4.

The compression grip 2 is fixed by welding or mortar filling in the connection tool 3.

The connecting tool 14 is a short cylindrical member having a length slightly less than twice that of the male thread 7 made of steel, and a male thread to be screwed into the female thread 7 of the connecting tool 3 is screwed on the outer peripheral surface thereof.

The long connector 12 is a long steel cylindrical member having a smooth surface made of steel, and has a bottom wall having a PC steel material insertion hole formed at one end, and the PC steel material is adjacent to the bottom wall. Has a storage part for inserting and storing a compression grip fixed to the end part, and a female screw 11 having a length equal to the length of the connecting tool 3 is screwed on the inner peripheral surface from the storage part to the other end opening part. It is set up.

Next, a method of using only the connecting device of the present invention or a combination of the connecting device and the connecting device will be described.

FIG. 3 shows a case where the PC steel material 1 is in a fixed state, and the nut 8 is screwed into the male screw 6 of the connector 3 and the nut 8 is locked and fixed to the bearing plate 9. When the PC steel material 1 is to be tensioned, a tension rod 10 having an internal thread screwed on the inner circumference is screwed into and tensioned by a cylinder.

FIG. 4 shows a case where PC steel materials 1 and 1 are connected using a tension device, and one compression grip 2
Is housed in a long connector 12 having an internal thread 11 screwed therein, and the connector 3 is screwed into the connector 12 for connection.

FIG. 5 shows a case where PC steel materials 1 and 1 are similarly connected, and a columnar connecting tool 14 in which a male screw 13 is screwed on the outer circumference.
Are connected to the female screws 7 and 7 of the connectors 3 and 3 by screwing half of the entire length.

[Effect of device]

As described above, this invention does not screw the male screw directly to the compression grip by arbitrarily combining the connector, the connector, and the long connector, but instead, in the connector already having the male screw screwed. Since the compression grip is stored, the manufacturing is easy and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a partly cutaway view of an embodiment of the present invention,
FIG. 2 is a vertical sectional view thereof, and FIGS. 3 to 5 are vertical sectional views of the use state thereof. 1 ... PC steel material, 2 ... compression grip, 3 ... connector, 4 ... bottom wall, 5 ... PC steel material insertion hole, 6 ... male screw, 7 ... female screw, 8 ... nut, 9 ... bearing plate, 10 ... pull bar, 11 … Female threads, 12… connectors, 13… male threads, 14… connectors.

Claims (1)

[Scope of utility model registration request] 1. A bottom wall having a male screw threaded on its outer peripheral surface over its entire length and a PC steel material insertion hole formed at one end, and a cylindrical shape having a PC steel material fixed to the end portion adjacent to the bottom wall. A cylindrical connector having an intermediate portion for inserting and accommodating the compression grip of the other end, and a female thread is screwed on the inner peripheral surface of the other end opening portion, and is screwed to the female thread, and a length slightly less than twice the length of the female thread. A cylindrical coupling tool having an external thread screwed on the outer peripheral surface, and an internal thread having a length equal to that of the connector threaded on the external thread of the connecting tool on the inner peripheral surface on one side, and on the other side. It has a bottom wall with a PC steel insertion hole and is adjacent to the bottom wall.It is combined with a long connecting part that has a storage part that inserts and stores a cylindrical compression grip with PC steel fixed at the end. A tension device for a compression grip.