JP2002364078A - Resin combined anchor device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an anchor device most suitable for work for preventing concrete and brick skeletons from peeling off. SOLUTION: An anchor 10 has an annular groove 13 on the surface of an anchor body 11 having a hollow structure, a slit 14 is provided from a distal end portion, and two types of long and short driving pins 16 are provided in the hollow portion.
Are selectively inserted. The washer 20 is provided with a through hole 22 at the bottom of the cup member 21 having a recess formed at the center.
And a flange member 23 is provided on the periphery of the cup member 21.
The flange member 23 is provided with a plurality of blade members 24 extending in the radial direction, and the blade member 24 is formed with reinforcing ribs 25 extending in the radial direction from the center of the washer. The anchor 10 and the washer 20 are used in a set state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchoring device for use in concrete, such as tunnels, bridges, sound insulation walls, etc., and for work to prevent spalling of bricks or brick structures.

[0002]

2. Description of the Related Art An anchor device according to the present invention is composed of an anchor and a nut. As a conventional anchor, first, a part of an anchor for fixing the anchor to a base material is hit and an expanded portion is opened. There is a metal expansion anchor including both a driving-type anchor and a fastening-type anchor in which an expansion part is opened by rotating and tightening a nut or bolt screwed to the anchor (Japanese Utility Model Laid-Open No. 3-75305). Next, a capsule-shaped container containing a fixed amount of the main agent and the curing agent in advance is inserted into the perforated hole, and the bolt is driven while rotating and hitting, and cured.
There is an adhesive anchor including both a capsule type to be fixed and an injection type in which the main agent and the curing agent are mixed and injected into the perforated hole, then the bolt is gently pushed in while being rotated, cured, and fixed (Japanese Patent No. 3141353). ). Furthermore, by injecting an adhesive into a gap generated at a boundary surface between the concrete skeleton and a finishing material such as a tile or a brick formed on the surface of the concrete, and an injection pin for fixing a peel prevention net of the finishing material, There is an anchor for repairing an outer wall including both anchor pins for fixing a net for preventing a finishing material such as a tile or a brick from peeling off from a concrete body (Japanese Patent Publication No. 7-949). Also, the prior art of the washer is an ordinary flat round washer.

[0003] The metal expansion anchor expands the expansion part and mechanically fixes the expansion part to the inner wall of the drilled hole. There is a gap at the boundary surface between the anchor and the inner wall of the drilled hole, and there is a gap between the anchor and the other moving object. There is a possibility that the anchor may be loosened and fall off due to vibration or the like. The adhesive anchor could not exert the fixing force immediately after the application, and could not apply a load to the bolt until the adhesive exerted its effect. Anchors for repairing outer walls are inferior in strength of anchors, and are not suitable as anchors used for spalling prevention work. In addition, flat round washers, after attaching a net or sheet to the skeleton, after applying an anchor and a washer, when spraying a finishing material such as cement mortar or applying an adhesive resin, between the skeleton surface and the washer Since it is difficult to form a gap, the finishing material or the adhesive resin does not enter and the effectiveness of integration of the finished surface is not good.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an anchor device which is most suitable for work for preventing concrete, such as a tunnel, a bridge, a sound insulation wall, etc., and a brick body or a brick structure from falling off.

[0005]

A first solution is that the anchor is provided with a continuous annular groove on the surface of a hollow-structured anchor body provided with a flange at a base end, and extends along the axial direction from the tip. A slit is provided, and the hollow portion is formed with a small diameter near the distal end, and a driving pin having a pointed shape from the initial end and having the same length as or shorter than the anchor body is inserted into the hollow portion. When attaching a washer to the above anchor and fixing a net or a fiber sheet used for work to prevent the concrete frame and brick frame from peeling off, the initial load of the anchor is made effective by the metal expansion anchor function. Is characterized by exerting an effect on the ultimate load by an adhesive anchor function. A second aspect of the invention is characterized in that, in the first aspect of the invention, the anchor is provided with a continuous annular groove on a surface having a length at least about one half from a tip end. A third aspect of the present invention is characterized in that, in the first aspect of the present invention, the anchor is formed such that the slit has a length of about three quarters of the total length along the axial direction from the distal end portion. A fourth aspect of the invention is characterized in that, in the first aspect of the invention, the washer has a blade member and a plurality of the blade members. A fifth solution is the fourth solution.
The washer is characterized in that a cup-shaped member is formed at the center. According to a sixth aspect of the present invention, in the fourth or fifth aspect of the present invention, the washer has a reinforcing rib formed on the blade member.

[0006]

1 to 4, an anchor 10 is provided with a flange 12 at a base end of an anchor body 11 having a hollow structure, and extends from a distal end to a length of about one half of the entire length. A continuous annular groove 13 is provided on the surface, and a slit 14 is formed to have a length of about three-fourths of the total length along the axial direction from the tip. The hollow portion 15 of the anchor body 11 has a small-diameter portion 15a formed near the distal end, and a driving pin 16 having a sharpened distal end is inserted into the hollow portion 15.

The anchor 10 of the embodiment is a combined type anchor having both an adhesive system and a driving effect. For this reason, the annular groove 13 was made about half as long as the tip,
An annular groove 13 may be formed in the entire anchor. Also, the reason why the slit 14 is made to have a length of about three quarters of the entire length is that not only the distal end of the anchor is expanded, but also the entire surface of the anchor is expanded and fixed, so that the frame 30 is fixed. This is for the purpose of coping with a case where the hardness is low, for example, in a brick structure.

Although the length of the driving pin 16 is substantially the same as the length of the anchor body 11 in FIG. 2A, the length is such that the anchor pin 16a is accommodated in the anchor body 11 in FIG. 2B. In FIG. 2a, the longer driving pin 16
Is inserted into the hollow portion 15 and the portion protruding from the base end is hit, so that the tip reaches the small-diameter portion 15a and the anchor body 1
The front end of 1 is expanded. On the other hand, in FIG. 2B, the shorter driving pin 16a is hit with a driving rod to expand the distal end of the anchor body 11, and in this case, the proximal end of the driving pin 16a is After the anchor is installed, the resin adhesive 34 is injected into the anchor main body 11 so that the resin adhesive 34 injected between the installation hole and the anchor from the slit 14 can be filled.

The annular groove 13 may be formed in an annular shape one by one, but may be formed in a helical shape by threading. Further, the slit 14 is provided along the axial direction passing through the center of the anchor main body 11 and divides the anchor main body into two members.

The washer 20 shown in FIG. 3 is provided with a through hole 22 at the bottom of a cup member 21 having a concave portion at the center.
A flange member 23 is formed on the periphery of the cup member 21 and a plurality of blade members 24 extending in the radial direction are provided on the flange member 23. The blade member 24 has a reinforcing rib 25 extending radially from the center of the washer. When the washer 20 and the cup member 21 are provided, a cement mortar 32
Is applied when the net 31 is stretched by spraying, but when the adhesive sheet 42 is applied and the fiber sheet 41 is stretched, the washer 20a as shown in FIG. In this case as well, the reinforcing rib 25 is provided on the blade member 24a.
a is formed.

Although the number of the blade members 24 is four, the number of the blade members 24 may be three, and the reinforcing rib 25 formed on the blade member 24 may be from the tip end to the cup of the cup member 21, or Like the other blade member 24a shown in FIG. 4, the reinforcing rib 25a may be formed in the middle of the blade member 24a.

Next, an operation procedure for performing repair work using the anchor device of the embodiment will be described with reference to FIG. When repairing an area where there is a possibility that the concrete skeleton and the brick skeleton may fall off, a net 31 is first applied to the skeleton 30, and the net 31 is attached by spraying a cement mortar 32. Next, anchor 1 to fix net 31
0 is constructed.

[0013] In the construction of the anchor, a drill suitable for the size of the anchor to be constructed on the skeleton 30 is selected and a construction hole 33 is drilled (Fig. 5a). Next, the resin adhesive 34 is injected into the installation hole 33 from the back (FIG. 5B). Subsequently, an anchor bolt is installed in the installation hole 33.
No. 0 inserts the leading end into the through hole 22 of the washer 20 by inserting the leading end into the working hole 22 with the leading end protruding from the cup bottom plate, and inserts the leading end into the working hole 33 with the washer assembled. At this time, it is necessary that the washer 20 presses the net 31 (FIG. 5C).

Since the driving pin 16 is inserted into the anchor 10, the driving pin 16 projecting from the anchor 10 inserted into the installation hole 33 is hit with a hammer, and the tip of the driving pin 16 is formed into a small diameter portion of the hollow portion 15. 15a, the tip of the anchor is extended, and the anchor 10 is
Work on 0. At this time, it is preferable that the cement mortar 32 does not enter between the blade member 24 and the surface of the frame 30 to form a gap, but a gap may be formed between the blade member 24 and the frame 30. (FIG. 5d).

FIG. 6 shows a state in which the repair work has been completed.
In a state where 1 is fixed, a cement mortar 35 for finishing is sprayed from above the washer 20 and the net 31, and the washer 20 and the net 31 are mixed with the cement mortar 3 for finishing.
Embed in 5. In addition, when the cement mortar 32 is sprayed at the time of attaching the net 31 first, a gap may be formed without sufficiently entering the cement mortar 32 into the gap between the frame 30 and the blade member 24, but for finishing, When spraying the finishing cement mortar 35 again,
The finishing cement mortar 35 enters the back side of the blade member 24, and the finishing cement mortar 35 and the washer 20.
Bonding becomes strong.

FIG. 7 shows a state in which the repair work for attaching and repairing the fiber sheet to the repair area is completed. The fiber sheet 41 is applied to the skeleton 30 of the repair area where there is a possibility of peeling, and the adhesive resin is applied from above. 42, the fiber sheet 41 is attached, and then the anchor 10 is installed to fix the fiber sheet 41. The operation procedure is shown in FIG.
Is the same as the procedure shown in FIG. When the adhesive resin 42 is used for attaching the fiber sheet 41, the finishing adhesive resin 4 is used.
5, the washer 20a can be embedded in the finishing adhesive resin 45 by using a thin washer 20a as a whole.

One of the washers 20, 20a is provided with a cup member 21 and the other is formed thick (FIG. 3).
There is a case where the thin washer 20 is used for repair work using cement mortar, and the thin washer 20a is used for repair work using an adhesive resin. When using cement mortar, in particular, the washer can be used with any structure.

[0018]

(1) Since the present invention is a combined type having both functions of an adhesive anchor and a metal expansion anchor, the initial load from injection of the resin adhesive immediately after the construction until the resin adhesive is hardened is obtained. After the resin adhesive has hardened, the anchor may become loose due to earthquakes or vibrations from other moving objects, reducing the possibility of falling off and maintaining long-term adhesion. it can. (2) Since the washer is provided with a cup member, when applying cement mortar or adhesive resin to the upper surface of the washer and the anchor to which the net or fiber sheet is fixed, the cement is applied to both the front and back surfaces of the washer. The mortar and the adhesive resin can be spread, and the integration between the skeleton and the finished surface can be improved. (3) When the anchor is installed after injecting the resin adhesive into the hole by simply changing the length of the driving pin, or when the resin adhesive is injected into the hole and the anchor is installed, and then the resin adhesive is applied to the anchor body. It is possible to cope with two types of injection methods in the case of injecting and filling a resin adhesive from the slit into the working hole and the anchor. (4) Since an annular groove is provided on the surface of the anchor body,
The adhesive force as an adhesive anchor function can be improved. (5) Since the anchor body has a long slit,
Since the whole anchor is expanded and fixed to the skeleton, it is possible to cope with a case where the skeleton has, for example, a brick structure and low hardness.

[Brief description of the drawings]

FIG. 1 is a perspective view of an anchor device.

FIG. 2 shows the anchor body, a is a long driving pin, b
Is a front view with short driving pins.

FIG. 3 shows a washer, a is a front view, and b is a partially cut-away side view.

FIG. 4 shows another embodiment of the washer, wherein a is a front view,
b is a side view of a partial cut.

FIG. 5 is a work process chart showing a procedure for performing repair work using an anchor device.

FIG. 6 is a cross-sectional view showing a state where repair work is performed using cement mortar.

FIG. 7 is a cross-sectional view showing a state where a repair work is performed using an adhesive resin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Anchor 11 Anchor main body 12 Flange 13 Annular groove 14 Slit 15 Hollow part 16 Driving pin 20 Washer 21 Cup member 22 Through hole 23 Flange member 24 Blade member 25 Reinforcement rib 30 Body 31 Net 32 Cement mortar 33 Construction hole 34 Resin adhesive 35 Cement mortar for finishing 41 Fiber sheet 42 Adhesive resin 45 Adhesive resin for finishing

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshihiko Niibori 2-2-2 Yoyogi, Shibuya-ku, Tokyo Inside the East Japan Railway Company (72) Inventor Katsuyuki Sato 1-24-24 Higashi-Nippori, Arakawa-ku, Tokyo No. 10 Sanko Techno Co., Ltd. (72) Inventor Takeshi Kobayashi 1-24-10, Higashi-Nippori, Arakawa-ku, Tokyo F-term in Sanko Techno Co., Ltd. BB35 BE05 BE07 CA74 CA79 CA84 EB02 3J001 FA02 GB09 HA02 JD02 KA26 KB04 3J025 AA02 BA11 BA32 BA34 CA03 DA06 DA08 EA01 3J036 AA05 FA01

Claims (6)

[Claims] An anchor (10) is provided with a continuous annular groove (13) on the surface of a hollow-structured anchor body (11) having a flange (12) at a base end, and is axially extending from a distal end. Slit (14) to provide a hollow part (1
5) is formed with a small diameter near the front end, and the hollow portion (15) has a pointed end from the initial end and has the same length as or shorter than the anchor body (11). 16) is inserted, and a washer (20) is attached to the anchor to fix a net (31) or a fiber sheet (41) used for work to prevent the concrete body and the brick body from peeling off. A resin combined anchor device characterized in that the metal expansion anchor function is effective for loads and the adhesive anchor function is effective for the ultimate load of the anchor. 2. The resin combination according to claim 1, wherein the anchor (10) is provided with a continuous annular groove (13) on a surface at least about one-half its length from the tip end. Anchor device. 3. The anchor (10) is provided with a slit (14).
The resin combined anchor device according to claim 1, wherein the length is formed to be approximately three-fourths of the total length from the distal end portion in the axial direction. 4. The washer (20) includes a blade member (2).
The resin combined anchor device according to claim 1, wherein the blade member (24) includes a plurality of blade members (4). 5. The resin combined anchor device according to claim 4, wherein the washer (20) has a cup member (21) formed at a central portion thereof. 6. The washer (20) includes a blade member (2).
The resin combined anchor device according to claim 4 or 5, wherein a reinforcing rib is formed in (4).