JPS6042083Y2 - Anchored end structure of tensile steel material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anchored end structure for a tensile steel material that is not grouted with a binding agent over the entire length of the tensile steel material.

Generally, in cases where the material is not completely integrated with the structure by filling and solidifying grout such as cement mortar, such as suspension materials for cable-stayed bridges and tensile steel materials in prestressed concrete that enable the replacement of PC steel wires, , the tensile force of the tensile steel must be permanently maintained only by the anchoring structure at its end.

Conventionally, in such cases, a metal cylinder was permanently crimped over a long area of the end of the tensile steel material, and a screw was carved into it and secured with a nut. The structure requires a long time to manufacture and assemble, is expensive, and has poor stability, so a large safety factor must be taken into consideration.

In view of the above-mentioned problems, the present invention aims to provide an anchoring end structure for tensile steel material that is compact and capable of strongly anchoring the end, and in which the work of forming the anchoring end is simple. There is a metal cylinder body with threads carved on the inner and outer peripheral surfaces thereof, a nut for fixing the cylinder body screwed onto the outer peripheral surface of the metal cylinder body, and the metal cylinder body. an inner end shielding plate that is screwed into one end and has a tensile steel bundle insertion hole in the center portion thereof, into which a tensile steel bundle is inserted; A tensile material fixing plate having a large number of unit wire insertion holes into which unit wires made by loosening a tensile steel bundle inserted through the plate are inserted, and the unit wires are crimped onto the protruding ends of the unit wires inserted through the tensile material fixing plate. a locking metal cylinder which prevents the unit wire rod from being removed from the unit wire insertion hole; and a solidifying filler filled between the inner end shielding plate and the tensile material fixing plate in the other end of the metal cylinder; An anchoring end structure of a tensile steel material comprising:

Next, an example of implementation of the present invention will be described with reference to the drawings.

In the figure, 1 is a metal cylinder made of steel material.

This metal cylindrical body 1 has screws 2 on both its inner and outer circumferential surfaces.
．． 3 is engraved.

An inner end slow-closing plate 4 is screwed into one end of the metal cylinder 1.

This inner end slow-closing plate 4 has a tensile steel bundle insertion hole 5 opened in the center.

A short metal tube 6 is integrally provided in the tensile steel bundle insertion hole 5 with one end protruding outward.

Further, a tensile material fixing plate 7 is screwed into the central portion of the metal cylinder 1.

This tensile material fixing plate 7 has a large number of unit wire insertion holes 8 opened therein.

Then, insert the end of the tensile steel bundle A made by twisting the unit wires a into the tensile steel bundle insertion hole 5 of the inner end shielding plate 4, unravel the tip end of each unit wire a, and pull it Material fixing plate 7
A locking metal cylinder 9 is crimped onto the protruding end of the unit wire rod insertion hole 8, thereby preventing the unit wire rod a from being pulled out from the tension member fixing plate 7.

In this way, the tensile steel bundle A is fixed to the tensile material fixing plate 7, and the tip of the locking metal cylinder 9 that is locked to the surface thereof is screwed into the outer end of the metal cylinder body 1 to close the outer end. It is pressed with the plate 10.

In addition, a consolidation filler 11 made of synthetic resin is filled between the inner end of the tension material fixing plate 6 and the closing plate 4, and the unit wire a is consolidated between the plates 4 and 7. ing.

Furthermore, the outer periphery of the tensile steel bundle A is covered with a rubber cover, and the end of the rubber cover 12 is fixed to the short tube 6 of the inner end shielding plate 4 by taping or the like.

Note that even if the tensile steel bundle A is made by twisting unit wires a,
The unit wire may be simply bundled, or the unit wire may be a single wire or a stranded wire made by twisting thin wires together.

When using the tensile steel material with the fixed end structure constructed as described above, if it is used as a suspension material for a cable-stayed bridge, the second
As shown in the figure, the metal cylindrical body 1 is inserted into the insertion hole of a stopper 14 provided protruding from the side surface of the bridge girder 13, and a nut 15 is screwed onto its outer periphery to prevent removal, thereby suspending the bridge girder 13.

The present invention is constructed as described above, and an inner end shielding plate is screwed into the inner end of the metal cylinder, and a tensile material anchoring plate is screwed into the central part of the metal cylinder with threads carved on the inner and outer peripheral surfaces. Insert a tensile steel bundle into the center of the inner end shielding plate, insert the unit wire with its end loosened through the tensile material fixing plate, and press the metal cylinder to its protruding end to prevent it from coming out. In addition, by injecting a solidifying filler between the inner end shielding plate and the tensile material fixing plate to integrate the unit wire with the metal cylinder, strong fixation is achieved within the short metal cylinder. The resulting structure is small in size, and can be assembled and positioned by screwing together the cylindrical bodies, improving work efficiency.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a longitudinal sectional view, and FIG. 2 is a sectional view of the device in use. 1...Metal cylinder body, 4...Inner end shielding plate, 5...Unit wire insertion hole, 9...Metal tube for locking , 10... Outer end shielding plate, 11.
・・・・・・Cagifier filler, A...Tensile steel bundle,
a...Unit wire rod.

Claims (1)

[Scope of utility model registration request] a metal cylindrical body with threads carved on its inner and outer circumferential surfaces; a nut for fixing the cylindrical body screwed onto the outer circumferential surface of the metal cylindrical body; and a central portion screwed into one end of the metal cylindrical body. an inner end shielding plate having a tensile steel bundle insertion hole into which a tensile steel bundle is inserted; and a tensile steel bundle that is screwed into the central portion of the metal cylinder and inserted through the inner end shielding plate. a tensile material fixing plate having a large number of unit wire insertion holes through which unit wires are inserted, and a tensile material fixing plate that is crimped to the protruding end of the unit wire inserted through the tensile material fixing plate, and the unit wire is inserted into the unit wire insertion hole. An anchoring end of a tensile steel material, comprising a locking metal tube that is prevented from being removed, and a consolidation filler filled between an inner end shielding plate and a tensile material anchoring plate in the other end of the metal tube. Department structure.