JPH0587316U - Anchor with deployment piece - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an anchor with a deployable piece that simplifies the planting work and that can be easily pulled out from the hole after the planting. [Structure] An overhang having a threaded portion 2 on an upper portion, a groove portion 3 provided around an intermediate portion to a lower portion to form a core portion 4, and a downward expanding taper surface 6 at a lower end of the core portion. Anchor body 1 in which jaws 5 are provided in series, and a sleeve 7 externally fitted to the anchor body
And a plurality of deploying pieces 8 connected to the lower end of the sleeve, housed in the groove of the anchor body and having the lower end facing the overhanging jaw base, the connection between the sleeve and the deploying piece expands without deformation between them. An anchor with a deployable piece is characterized in that it is connected through an engaging portion 9 that enables the deployable movement of the piece.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an anchor with a deployable piece which is planted in a hole having an enlarged diameter portion called an undercut in the inner depth.

[0002]

[Prior Art]

 When attaching various parts or structures to be fastened to solidified concrete, anchors are planted in holes drilled in the concrete and used.

In order to enhance the retaining strength of the anchor after planting in the above-mentioned anchor, a diameter-expanded portion is formed inside the hole formed in the concrete, and the anchor corresponds to the diameter-expanded portion. Deployment consisting of a combination of an anchor body in which a bulging jaw having a downwardly expanding taper surface is continuously provided on the lower part of the anchor body, and a plurality of deploying pieces that deploy in the gap between the bulging jaw of the anchor body and the enlarged diameter portion in the hole Detachable anchors have already been proposed by the applicant.

In the above anchor with a deployable piece, the hole into which the anchor is implanted has a size such that the overhanging jaw provided in the lower portion of the anchor body can be loosely inserted, so that this type of anchor is deployed on the overhanging jaw. In order to increase the expansion amount of the expansion piece, the multiple expansion pieces with a thicker wall thickness are housed in the groove formed around the lower part of the anchor body, and the sleeve made of a thin wall tube is attached to the anchor body. The outer end of the sleeve is connected to the expansion piece by inserting it into the hole, and the upper end of the sleeve protruding into the hole is hammered and the expansion piece is pushed through the sleeve. In some cases, a piece moves out onto the overhanging jaw of the anchor body, projects outward, and expands in the gap between the expanded diameter portion and the anchor.

[0005]

[Problems to be solved by the device]

 As described above, in a conventional anchor with a deployable piece, a combination of a plurality of deployable pieces with increased wall thickness and a thin-walled sleeve are combined, and the sleeve and each deployable piece are connected by a groove provided around the lower part of the anchor body. However, when the deployment piece is pushed in to deploy it and it is deployed, plastic deformation (bending) occurs at the lower end of the sleeve that connects the two and the engaging part provided at the top of the deployment piece, which corrodes after implantation, After the planting, it sometimes hindered to pull back the deployable piece to its original position and pull out the anchor from the hole.

The present invention has been made in view of the above points, and improves a joint portion that connects a sleeve and a deployable piece so that plastic deformation does not occur between the sleeve and the deployable piece, and the deployable piece can be smoothly spread. The purpose of the present invention is to provide an anchor with a deployable piece that can be easily pulled out from the hole after it has been planted.

[0007]

[Means for Solving the Problems]

 The gist of the present invention for achieving the above-mentioned object is to have a threaded portion in an upper portion, and to hang a groove portion from an intermediate portion to a lower portion to form a core portion, and to form a core portion. An anchor body in which an overhanging jaw having a downwardly expanding taper surface is continuously provided, a sleeve fitted over the anchor body, connected to the lower end of the sleeve, and accommodated in a groove portion of the anchor body so that the lower end extends over the protruding jaw base. An anchor with a deployable piece, characterized in that the sleeve and the deployable piece are connected to each other via an engaging portion that allows the deployable piece to deploy without deformation. It is in.

[0008]

[Action]

 When the anchor is inserted into the hole with the expanded diameter part and the upper end of the sleeve is hammered, the deployable pieces are pushed through the sleeve, and each deployable piece moves freely at the joint with the sleeve and is placed on the overhanging jaw. Anchor is planted by expanding and expanding into the gap between the expanded diameter part.

When the sleeve is first pulled out in a state where the anchor body is held in the hole after implantation, each deployable piece is pulled back from the overhanging jaw into the groove portion of the anchor body and is pulled out together with the anchor body.

[0010]

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view in which a part of the anchor of the present invention is cut away.

In the figure, reference numeral 1 denotes an anchor body, which has a screw portion 2 at an upper portion thereof, and a groove portion 3 is circumferentially provided from an intermediate portion to a lower portion to form a center core portion 4, and a bottom portion of the center core portion 4 is formed. A protruding jaw 5 having a tapered surface 6 that gradually expands downward is continuously provided. Reference numeral 7 is a sleeve made of a thin-walled tube fitted on the anchor body 1, 8 is a deployment piece connected to the sleeve 7 in the groove 3, and the deployment piece 8 is composed of a plurality of relatively thick cylindrical bodies. The sleeve 7 and the sleeve 7 are connected to each other through an engaging portion 9 which is free from deformation (plastic deformation) between the two and allows the deploying piece 8 to freely deploy. The structure of the engaging portion 9 of the embodiment shown in FIGS. 1 and 2 (a) is such that a groove is formed inside the upper portion of the developing piece 8 to form an inwardly bent engaging hook portion 9a. Corresponding to the engaging hook portion 9a, an outwardly bending engaging hook portion 9b is formed at the lower end of the sleeve 7 to form an engaging hook portion 9b for both engaging hook portions 9a, 9b is engaged.

FIGS. 2 (b) and 2 (c) show another embodiment of the structure of the engaging portion. In FIG. 2 (b), the upper part of the deploying piece 8 forming the engaging hook portion 9a is shown. An elongated engaging hole 9c is provided in the groove formed inside, and a part (not shown) of the engaging portion 9b at the lower end of the sleeve 7 is hooked on this. Further, in the case of FIG. 2 (c), the inner surface of the upper portion of the deployable piece 8 is gradually thinned toward the upper end portion to form the thin wall thickness configuration 8a, and the engaging recessed portion 9d is formed in a notched shape from the upper end of the deployable piece 8. An extended locking portion 9d 'is provided inside the engaging concave portion 9d, and correspondingly, an engaging projection piece 9e is downwardly projected at the lower end of the sleeve 7 and a laterally extending locking portion 9e' is provided at the tip thereof. Is provided so that the engaging projection 9e of the sleeve 7 can be hooked in the engaging recess 9d of the developing piece 8.

In short, the above-mentioned engaging portion 9 has a structure in which the developing piece 8 does not deform between the developing piece 8 and the sleeve 7 while the connected state is maintained, and the developing piece 8 moves in the inward and outward directions. It may be one that allows free movement within a predetermined range in the (deployment direction).

The above-described connection between the sleeve 7 and the deployable piece 8 is made by fitting the sleeve 7 onto the anchor body 1 and then housing each deployable piece 8 in the groove portion 4 of the anchor body 1. , All the deployable pieces 8 are put into a bound state by an appropriate means so that the deployable pieces do not separate from each other or wobble. In the embodiment, this binding is provided with a groove 10 on the outer surface of the deploying piece 8 and a binding strip 11 having elasticity is wound around this groove. However, for example, a weak adhesive is used to connect the deploying pieces to each other. They may be attached or wrapped with cellophane tape to bind them together.

Reference numeral 12 denotes a bent edge formed inwardly at the upper end edge of the sleeve 7, which prevents deformation of the upper end edge of the sleeve 7 when the upper end edge of the sleeve 7 is hammered when implanting an anchor, and a hole. It is used as an engagement step with the extraction tool when pulling out the sleeve 7 from the.

The procedure for implanting the anchor having the above structure will be described with reference to FIGS. 3 (a) to 3 (c).

The anchor is inserted into the hole A having the enlarged diameter portion B inside (see FIG. 3 (a)), and the upper end of the sleeve 7 protruding above the hole A is hammered using a hammering tool prepared separately. When hit, the expansion piece 8 is pushed through the sleeve 7, and the expansion piece 8 moves freely at the engaging portion 9 and advances from the groove portion 3 of the anchor body 1 onto the overhanging jaw 5 and finally the overhanging jaw. 5. An anchor is planted in the space between the expanded diameter portion B and the expanded portion B, and after the anchor is planted, the object to be fastened C is fixed to the threaded portion 2 of the anchor body 1 using the mounting bolt D. (See Fig. 3 (b)) To pull out the anchor after planting from the hole A, remove the bolt D, then push the anchor body 1 in a state of floating from the bottom of the hole A once into the hole. And pulling out the sleeve 7 by engaging the pulling-out tool E prepared separately with the bent edge 12 at the upper end of the sleeve 7 (see FIG. 3 (c)), the deploying piece 8 is stretched in the reverse order of the deploying time. It is pulled back to the groove portion 4 from above the protruding jaw 5 and is pulled out from the hole A together with the anchor body 1.

In the above embodiment, the structure in which the screw portion 2 of the anchor body 1 is applied to the female screw anchor formed by the female screw has been described. However, as shown in FIG. 4, the screw portion 2 is formed by a male screw. Of course, it may be an anchor.

[0020]

[Effect of the device]

 As described above, the present invention has the following effects.

(1) At the time of implantation, a plurality of relatively thick deployable pieces advance from the groove portion of the anchor body onto the overhanging jaw and deploy to the expanded diameter portion of the hole. Large amount and high retaining strength.

(2) Since the sleeve that is fitted onto the anchor body is made of a thin tube, and the anchor body can be made relatively thicker than the diameter of the hole to be implanted, reliability in terms of strength is improved. The workability can be improved by making it easier to drill holes to be planted.

(3) In the engaging portion that connects the deployable piece and the sleeve, the deploying movement of the deployable piece is made free, so that the anchor planting work can be performed securely without being deformed in the process of deploying the deployable piece. It's real and easy, and the deployment piece can be pulled back smoothly through the sleeve after anchoring, which makes it easy to remove the anchor from the hole and replace the anchor.

[Brief description of drawings]

FIG. 1 is a front view in which a part of an anchor of the present invention is cut away.

2 (a), (b) and (c) are perspective views of a developed piece.

3 (a), (b) and (c) are explanatory views of a planting procedure.

FIG. 4 is a front view in which a part of an anchor showing another embodiment is cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Anchor main body 2 ... Screw part 3 ... Groove part 5 ... Overhanging jaw 6 ... Tapered surface 7 ... Sleeve 8 ... Deployable piece 9 ... Engaging part A ... Hole B ... Expanding part

Claims (1)

[Scope of utility model registration request] 1. An overhanging jaw having a threaded portion on an upper portion, a groove portion extending from an intermediate portion to a lower portion to surround a groove portion to form a core portion, and a downwardly expanding taper surface at a lower end of the core portion. An anchor main body continuously provided, a sleeve fitted over the anchor main body, a plurality of deployment pieces connected to the lower end of the sleeve, housed in a groove of the anchor main body and having the lower end facing the overhanging jaw base, An anchor with a deployable piece, wherein the sleeve and the deployable piece are connected to each other through an engaging portion that allows the deployable piece to deploy without deformation.