JPS6132003Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an anchor for an earthquake-resistant extension wall.

Conventionally, anchors for earthquake-resistant extension walls are known, in which the anchor body is protruded by being fixed to the existing framework of a building, such as a wall or column, and used as it is or by welding reinforcing bars as reinforcement for an earthquake-resistant wall extension agent. One of them is a solid shaft-like anchor body 1 having a plurality of grooves 2 extending in the axial direction at its tip as shown in FIG. A fitting hole 4 is formed in a protruding manner and reaches an appropriate depth from the distal end surface 3a of the wedge piece 3 to the tip of the anchor body 1, and the proximal diameter of the wedge piece 3 is larger than the fitting hole 4. Since the connecting point 5 is located on the extension of the periphery of the insertion hole 4 of the anchor body 1, it is difficult to break with a striking force applied in the axial direction, and even if it breaks, the wedge piece 3
Since it was not easily inserted into the fitting hole 4, there was a problem in workability.

This design eliminates these drawbacks, and includes a solid shaft-shaped anchor body, a truncated conical wedge piece that is integrally formed at the tip of the anchor body, and a truncated conical wedge piece that protrudes from the tip of the wedge piece. The tip of the wedge piece has a fitting hole that reaches an appropriate depth and has a diameter that is approximately equal to or smaller than the proximal diameter of the wedge piece, and a hole that has a diameter larger than the proximal diameter of the wedge piece that is formed at the tip of this fitting hole. This drawback has been solved by providing an enlarged hole portion having an inclined surface on the proximal end side.

FIG. 2 shows an embodiment of the present invention,
A truncated conical wedge piece 13 is integrally formed and protruded at the tip of a solid shaft-like anchor body 11 having a plurality of grooves 12 extending in the axial direction at the tip,
From the tip surface 13a of this wedge piece 13 to the anchor body 1
A hole 15 is formed at the tip end of the wedge piece 13 to a suitable depth and has a diameter that is approximately equal to or smaller than the base end diameter of the wedge piece 13, and the anchor body 11 is inserted into the hole 14.
shall be. Then, a knife is inserted into the hole 15 so as to approach the distal end surface of the anchor body 11, and an enlarged hole portion 16 having a diameter larger than the base end diameter of the wedge piece 13 is formed in the insertion hole 14.

An anchor for an earthquake-resistant extension wall having such a configuration is inserted into a hole formed in an existing concrete wall, pillar, etc. of a building, and the base end surface 11a of the anchor body 11 is struck with a hammer or the like. The joint 17 between the anchor body 11 and the wedge piece 13 formed at the front of the surface is broken, and the proximal end of the wedge piece 13 is inserted into the enlarged hole 16 as it is, and then the proximal end of the enlarged hole 16 is inserted. The anchor body 11 is pushed along the side inclined surface 18 and press-fitted into the fitting hole 14, and the tip portion of the anchor body 11 divided by the groove 12 is expanded and bitten into the hole wall to make it fit tightly. The anchor body 11 exposed from the wall, pillar, etc. is used as it is or by welding reinforcing bars thereto as reinforcement for an earthquake-resistant extension wall.

As described above, in the present invention, an enlarged hole portion with a diameter larger than the proximal diameter of the wedge piece and an inclined surface on the proximal side is provided at the tip of the insertion hole, so that the connection point between the anchor body and the wedge piece is It is formed at the front of the distal end of the enlarged hole, and when inserted into a hole in concrete or the like and struck with a hammer, etc., it easily breaks, and the base end of the wedge piece enters the enlarged hole as it is, causing an inclined surface. The tip of the anchor body is then pushed in, and then it is pressed into the fitting hole while expanding the tip of the anchor body.Since the fitting hole is narrow, it can be expanded sufficiently and fixed easily and reliably, making it easy to work with and also allows the extension wall to be attached to the existing frame. The present invention provides an earthquake-resistant extension wall anchor that can be firmly fixed to the ground.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a conventional product, and FIG. 2 is a longitudinal sectional view of an embodiment of the present invention. 11... Anchor body, 11a... Base end surface, 12
... split groove, 13 ... wedge piece, 13a ... tip surface,
14... Fitting hole, 15... Hole, 16... Enlarged hole portion, 17... Connection location, 18... Inclined surface.

Claims (1)

[Scope of utility model registration request] A solid shaft-like anchor body, a truncated cone-shaped wedge piece integrally formed at the tip thereof and protruding, and a wedge piece that reaches an appropriate depth from the tip surface of the wedge piece to the tip of the anchor body. An insertion hole with a diameter that is approximately equal to or smaller than the proximal diameter of the insertion hole, and an enlarged hole that has a diameter larger than the proximal diameter of the wedge piece formed at the tip of the insertion hole and has an inclined surface on the proximal side. Anchor for earthquake-resistant extension walls with a section and a section.