JPH0423154Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an anchor for repairing external walls such as mortar.

(Prior art) An anchor that is made by making a longitudinal cut in one end of a pipe material and applying pressure from the outside near the end on the side where the cut was made to form a protrusion on the inner wall of the pipe has been developed since then.
It is known from the publication No. 49-4060. This anchor is inserted into a pilot hole in a concrete frame with the cut end facing toward the back of the hole, and the pipe material is struck with a driving rod with a sharp tip to expand the tip of the pipe inside the pilot hole. It is supported on a concrete wall.

In addition, an anchor in which a longitudinal cut is made at both ends of the pipe material, a bolt with a tapered part at one end is inserted into the pipe material, and a taper nut with a flange is attached to the other end of the pipe material has been developed. 50−96859
It is known from the publication no. This anchor is
Insert the tapered part of the tapered bolt toward the back of the hole in the concrete frame, and attach the taper nut to the pipe material protruding from the concrete frame.
By applying a driving pipe to the nut portion and hammering the driving pipe, both ends of the pipe are expanded in the prepared hole and supported on the concrete frame.

All of the above-mentioned conventional technologies were developed for the purpose of attaching articles to concrete walls, so the pipe material cast into the concrete frame can become a material that supports the outer wall by mortar or the like covered with the concrete frame. It was unsuitable for the required anchor for repairing exterior walls.

That is, in the former prior art, the tip of the pipe material is only supported by the concrete frame, so the structure cannot be fixed to the outer wall.
In addition, although the latter of the prior art has a structure in which both ends of the pipe material can be expanded and has the conditions for fixing to the outer wall, similarly to the former, supporting the outer wall requires tightening nuts as a separate operation. Nakatsuta.

(Problem to be solved by the invention) The problem to be solved by the invention is to create an exterior wall that can be fixed to the concrete framework without damaging the exterior wall with mortar or the like when pouring into the concrete framework, and without using adhesives. To provide repair anchors.

(Means for solving the problem) The means for solving the problem in this invention are as follows:
An anchor body formed of pipe material, having a plurality of longitudinal cuts along both ends and a pair of protrusions facing the inner wall of the pipe near the tip, and a core inserted from the base end of the anchor body. comprising a rod;
The core rod is characterized in that a tapered portion is provided at a position that projects from the proximal end of the anchor body with a gap when the distal end comes into contact with the protrusion of the anchor body. .

(Function) The straight end of the core rod 5 is inserted from the proximal end of the anchor body 1 and comes into contact with the protrusion 4, so that the straight end of the core rod 5 is inserted into the anchor body 1.
and insert it into the prepared hole 12 of the concrete frame.
Next, the core rod 5 is struck to expand the tip of the anchor body 1 at the back of the prepared hole with the tip of the core rod 5, and then the base end of the anchor body 1 is expanded with the tapered part 6 of the core rod 5. It expands and adheres to the outer wall, thereby preventing the outer wall 10 from floating.

(Example) The anchor body 1 is made of a pipe material, and has two longitudinal cuts 2 at the distal end and three cuts 3 at the base end, and one pair near the distal end facing toward the inner wall of the pipe. A protrusion 4 is provided. Reference numeral 5 denotes a core rod which is inserted into the anchor body 1 from the base end thereof, and has a tapered portion 6 formed at the base end, and has approximately the same length as the anchor body 1. have. That is, the taper portion 6 is provided at a position where the core rod 6 projects from the proximal end portion of the anchor body 1 with a gap when the distal end thereof abuts the protrusion portion 4 of the anchor body 1 .

The anchor body 1 of the example has a length of 60 mm and an outer diameter of 6.
mm, thickness 0.8mm. Further, two protrusions 4 formed at the tip of the anchor body 1 are provided with a phase of 180°, and the cut 2 is formed between the protrusions 4 and has a depth of 20 mm from the pipe opening. Further, the cuts 3 at the base end are provided at three locations with a phase of 120°, and the depth is 12 mm from the pipe opening.

The embodiment has the above-mentioned configuration, with the pilot hole 12 being bored in the outer wall 10 of mortar etc. and the concrete frame 11, and with the straight end of the core rod 5 in contact with the protrusion 4 of the anchor body 1. Anchor body 1 is inserted into pilot hole 12
(Figure 4A). At this time, it is preferable that the anchor body 1 be pushed slightly inward from the surface of the outer wall 10.

Next, the core rod 5 is struck, and the tip of the anchor body 1 is expanded using the force of the core rod 5 pushing into the protrusion 4 (Fig. 4B), and the core rod 5 is further struck to make the tip of the anchor body 1 taper. The proximal end of the anchor body 1 is expanded by the section 6 (FIG. 4C). In order to completely drive the tapered portion 6 of the core rod 5 into the end of the anchor body 1, it is preferable to hit the end of the core rod 5 not directly but through a rod-shaped jig.

In this way, the tip of the anchor body 1 is expanded and fixed in the prepared hole 12, and then the base end is also expanded and fixed to the outer wall 10, so that the anchor body 1 is firmly supported by the concrete frame and the outer wall. After that, you can fix the exterior wall without using adhesives and prevent it from floating. Note that the outer wall of the portion where the anchor body is inserted is filled with a plug or mortar to finish the surface.

In the embodiment, the anchor body is made by cutting a pipe material to a predetermined length, but instead of the pipe material, it may be formed by bending a plate material into a pipe shape.

(Effects of the invention) This invention provides multiple cuts at both ends of the anchor body, first expands the tip part in a pilot hole drilled in the concrete frame, and then expands the base end into an external wall such as mortar. Since both ends of the anchor body are expanded with a time lag, even if the mortar wall is thin, the outer wall can be repaired without damaging it.

[Brief explanation of the drawing]

Figure 1 is a front view of the anchor body and core rod of the present invention.
FIG. 2 is a sectional view of the anchor body, FIG. 3 is a front view of the anchor rod inserted into the anchor body, and FIGS. 4A, B, and C are explanatory diagrams showing the working order of using the anchor of the present invention. 1... Anchor body, 2, 3... Cutting, 4...
Projecting portion, 5...Core rod, 6...Tapered portion, 10...
External wall, 11... Concrete frame, 12... Pilot hole.

Claims (1)

[Scope of utility model registration request] An anchor body formed of pipe material, having a plurality of longitudinal cuts along both ends and a pair of protrusions facing the inner wall of the pipe near the tip, and a core inserted from the base end of the anchor body. and a rod, and the core rod is provided with a tapered portion at a position that projects from the proximal end of the anchor body with a gap when the tip comes into contact with the protrusion of the anchor body. Features: Anchor for repairing exterior walls.