JPH0322349Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an end cap that protects the tip of a permanent anchor, a removable anchor, etc.

<Prior Art> There is an anchor construction method in which a tensile material is sheathed with a sheath material, and a grout material such as cement milk is injected into and fixed to the inside and outside of the sheath material.

In this anchor construction method, a steel or aluminum end cap (pilot cap) is attached to the tip of the sheath material.

This end cap is used as a guide for the tensile material and sheath material.

Furthermore, a grout hose for filling the anchor hole with grout, such as cement milk, is exposed at the tip of the end cap.

<Problems to be solved by the invention> The conventional end cap described above has the following problems.

(b) The end cap is connected to the sheath material and tensile material by welding, but this welding work is time-consuming and labor-intensive.

(b) If the tension member with the end cap attached collides with the bottom of the anchor hole, the end cap will be buried underground.

As a result, the grout hose exposed at the end surface of the end cap becomes clogged with soil, making it extremely difficult to inject grout.

<Purpose of the present invention> The present invention was devised to solve the above-mentioned problems.
The grouting work can be done smoothly, and
The purpose is to provide an anchor end cap with excellent impact resistance.

<Configuration of the present invention> An embodiment of the end cap according to the present invention will be described below with reference to the drawings.

<A> Shape of the end cap (FIGS. 1 to 3) The end cap 1 is a cylindrical body with one end open, which is attached to the tip of, for example, a corrugated sheath 3 for sheathing the tensile material 2.

The opening 11 of the end cap 1 has a diameter approximately equal to the outer diameter of the tip of the corrugated sheath 3, and a thread 18 is carved on the inner periphery of the opening 11 to cover the opening 11 of the corrugated sheath 3. It is configured so that it can be fixed in place.

Further, the distal end portion 12 of the end cap 1 that is continuous with the body portion 14 is formed into a tapered shape.

A grout outlet 1 is provided on the circumferential surface of this tip 12.
3 will be established.

Further, in the end cap 1 of the present invention, a plurality of protrusions 15 are provided on the inner circumferential surface thereof to protrude toward the closed end surface 16 to form an uneven surface.

That is, the plurality of protruding stripes 15 are on the inner circumferential surface of the end cap 1 of the cylindrical body.
It is provided so as to protrude almost parallel to the central axis of the.

A collision surface 17 is formed at the end of the protrusion 15 on the opening 11 side.

<B> Material of the end cap The end cap 1 having the above shape is made of, for example, thermoplastic resin.

Specific materials include polyolefin resin,
High-density polyethylene, polypropylene, etc. can be used.

Next, the assembled state will be explained.

<A> Attaching the cap When fixing the end cap 1 to the corrugated sheath 3, it is sufficient to simply screw the end cap 1 into the opening 11 while storing the end of the corrugated sheath 3 inside.

At this time, the end of the corrugated sheath 3 is screwed in until it comes into contact with the collision surface 17 of the end cap 1.

In addition, end cap 1 and corrugated sheath 3
In some cases, an adhesive is applied to the screwed part and the screw is screwed in.

There is no need for conventional welding work.

<B> When inserting into the anchor hole In the case of a downward facing anchor hole 4, when the anchor material with the end cap 1 attached is inserted, the end cap 1 collides with the bottom of the hole due to its own weight.

This impact force is concentrated on the end cap 1, and the tapered tip 12 has a plurality of reinforcing protrusions 15 protruding in parallel from its inner peripheral surface.

Therefore, the strength of the tip portion 12 alone can sufficiently resist this impact.

Therefore, the opening 11 and the body 14 can be made thinner than the tip 12.

In addition, in the end cap 1 of the present invention, the collision surface 17 at one end of the group of protrusions 15 also acts as a stopper, so when it collides with the bottom of the anchor hole 4, the corrugated sheath 3 tries to move forward due to inertia force. However, the forward movement of the tensile material 2 and the like is restrained.

Therefore, damage to the end cap 1 is prevented.

<C> When working on grouting outside the sheath: A grout hose 5 is placed inside the tension member 2, and the tip of the grout hose 5 is guided into the end cap 1.

Therefore, when the end cap 1 collides with the bottom of the hole, the grout hose 5 is protected by the end cap 1 and is not blocked.

Also, in the case of an upward-facing anchor, the end cap 1 is such that earth and sand in the anchor hole 4 can be removed from the grout hose 5.
prevent the opening from being blocked.

Furthermore, when filling the gap between the anchor hole 4 and the corrugated sheath 3 with grout, even if the tip of the end cap 1 is buried to some extent, the grout discharge port 13 is filled after the end cap 1 is filled.
Since it is discharged from the grouting process, it does not cause support to the grouting work.

<Effects> Since the present invention is as explained above, the following effects can be obtained.

(a) Even if the end cap is somewhat buried in the bottom of the hole, the grout material can be reliably discharged from the grout discharge port provided on the side of the end cap.

(b) The end cap can be fixed by simply screwing it into the sheath material, so it does not take much time to install.

(c) A protrusion is provided on the inner periphery of the tapered tip of the end cap, so that most of the impact force caused by a collision can be countered by this tip alone.

Therefore, not only can damage to the end cap be prevented, but also the thickness of the opening connected to the sheath material can be made thin.

(d) Since it is made of resin, it is easy to manufacture and suitable for mass production.

[Brief explanation of the drawing]

Figure 1: Partial sectional view of the fixed part of the permanent anchor,
Figure 2: End cap illustration, Figure 3: 2nd
Cross-sectional view of − in the figure.

Claims (1)

[Scope of Claim for Utility Model Registration] A cylindrical body with a bottom, which is attached to the tip of an anchor fixing part and has one end open. Anchor end cap with multiple protrusions protruding almost parallel to the central axis of the anchor and a grout outlet on the side of the tip.