JP2005155241A - Anchor pin for outer wall repair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively prevent the reverse flow of a filled adhesive agent by securely sealing a clearance between a drive hole and an anchor pin body by a sleeve. <P>SOLUTION: This anchor pin comprises a hollow cylindrical anchor pin body 55 inserted into a drive hole drilled in a concrete skeleton from an outer wall, a plug 56 for expansion inserted in the anchor pin body 55, a filler port 57 for an adhesive agent formed at the rear end of the anchor pin body 55, a lead-out hole 59 for leading out the adhesive agent filled from the filler port 57 to the inside of the anchor pin body 55 to the outside of the anchor pin body 55, and a sleeve 60 disposed on the outer periphery of the anchor pin body 55, moving to the rear end of the anchor pin body 55 according to the driving of the anchor pin body 55, and sealing a clearance between the drive hole and the anchor pin body 55 at that position to stop the reverse flow of the adhesive agent. The sleeve 60 used is a metal sleeve. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an anchor pin with an adhesive inlet for repairing an outer wall that repairs lifting or peeling of an outer wall (tile or mortar) with respect to a concrete frame of a building.

  As this type of anchor pin, there is known one in which a plug for expansion is accommodated inside a hollow cylindrical anchor pin body and an adhesive inlet is provided at the rear end (for example, Patent Document 1, 2).

  FIG. 3 shows an external appearance of an anchor pin known in the art before use, and FIGS. 4 to 6 show a process of repairing an outer wall using the anchor pin.

  As shown in FIGS. 3 to 6, the anchor pin 1 includes a hollow cylindrical anchor pin main body 5 inserted into a driving hole 4 drilled in the concrete housing 3 from the outer wall 2, and the anchor pin main body 5. A plug 6 which is inserted in advance and is driven from behind after inserting the anchor pin main body 5 into the driving hole 4 so that the distal end portion of the anchor pin main body 5 is expanded and bitten and fixed to the concrete frame 3; An adhesive inlet 7 formed at the rear end of the pin body 5, and a lead-out hole 9 for leading the adhesive 8 injected into the anchor pin body 5 from the inlet 7 to the outside of the anchor pin body 5 The anchor pin main body 5 is arranged on the outer periphery, and moves to the rear end of the anchor pin main body 5 as the anchor pin main body 5 is inserted into the driving hole 4. A sleeve 10 made of a resin such as polyethylene that seals the gap between the main bodies 5 and prevents back flow of the adhesive 8 through the gap between the driving hole 4 and the anchor pin main body 5 when the adhesive 8 is injected thereafter. And.

  In this case, a split groove 11 is provided at the tip of the anchor pin main body 5 for facilitating the expansion and for promoting the lead-out of the adhesive 8. Further, a flange 12 is provided at the rear end of the anchor pin main body 5 to hold the outer wall 2 and to prevent leakage of the injected adhesive 8, and the rear end of the anchor pin main body 5 including the flange 12 is provided. Is provided with a portion 13 (see FIG. 3) coated with resin.

When repair work is performed using this anchor pin 1 to prevent the outer wall 2 from being lifted, the work is carried out according to the following procedure.
(1) First, as shown in FIG. 4, a drilling hole 4 having a depth reaching the concrete frame 3 from the outer wall 2 of the building is drilled using a drill. Then, the driving hole 4 is cleaned with a blower or the like to remove chips and the like therein.

  (2) Next, the anchor pin main body 5 is driven into the driving hole 4 using a hammer. At this time, the sleeve 10 fitted to the outer periphery of the anchor pin main body 5 moves to the rear end of the anchor pin main body 5.

  (3) Next, as shown in FIG. 5, the plug 6 inserted in advance into the anchor pin main body 5 is driven into a predetermined position with the dedicated driving rod 14. By doing so, the wedge pin action of the plug 6 causes the tip of the anchor pin main body 5 to expand, and bites and fixes to the concrete housing 3.

  (4) Next, as shown in FIG. 6, wet curing type epoxy resin, polymer cement slurry or the like is transferred from the injection port 7 to the inside of the anchor pin body 5 through the dedicated nozzle 16 by the adhesive injection gun 15. A predetermined amount of adhesive 8 is injected under pressure.

  (5) Next, after the injection of the adhesive 8, the nozzle 16 is pulled out, and the injection port 7 is closed with a putty or stopper such as epoxy mortar having an affinity for the adhesive to finish it in a beautiful closed state.

  As described above, when the adhesive 8 is pressurized and injected from the inlet 7 into the anchor pin main body 5, the adhesive 8 passes through the split groove 11 and the outlet hole 9 as shown in FIG. It flows out from the inside to the outside and penetrates into the gap 17 between the anchor pin main body 5 and the driving hole 4 and the gap 18 between the outer wall 2 and the concrete frame 3. As a result of the curing of the adhesive 8, the anchor pin 1 previously fixed to the concrete housing 3 is more and more strongly fixed to the concrete housing 3 and the outer wall 2 by the action of the adhesive 8. At the same time, the outer wall 2 is firmly bonded and integrated with the concrete housing 3 by the synergistic action of the anchor pin 1 and the adhesive 8 injected into the gap 18 between the outer wall 2 and the concrete housing 3.

  When constructed as described above, when the adhesive 8 is injected into the anchor pin main body 5, the adhesive 8 is injected into the outer wall 2 along the gap 17 between the anchor main body 5 and the driving hole 4 by the injection pressure. Attempts to back flow to the surface. Further, when the injection pressure of the adhesive 8 is applied to the gap between the outer wall 2 and the concrete housing 3, a force for further raising the outer wall 2 is exerted. However, in the anchor pin 1, the flange 12 is provided at the rear end of the anchor pin main body 5, and the resin sleeve 10 is provided so as to stop at the front side of the flange 12. be able to.

  Therefore, for example, a phenomenon that the outer wall 2 is further lifted can be prevented, and therefore, an adhesive such as a polymer cement slurry requiring a relatively high injection pressure can be used without restriction. In addition, since it is not necessary to take care to adjust the injection pressure to be low, the spreading area of the adhesive 8 can be expanded under a constant high injection pressure. From this point, the outer wall 2 can be bonded with high strength. It becomes. In addition, since high pressure injection is possible, clogging can be prevented.

Japanese Utility Model Publication No. 8-183 JP 2000-170389 A

  By the way, in the conventional anchor pin 1 described above, a relatively soft sleeve made of resin such as polyethylene is used as the sleeve 10 fitted to the outer periphery of the anchor pin main body 5, so that the anchor pin main body 5 is driven into the driving hole 4. In this case, the shape may be forcibly deformed to an unplanned shape and may jump out to the surface of the outer wall 2. In this case, the gap 17 between the driving hole 4 and the anchor pin main body 5 cannot be reliably sealed, so that the backflow of the adhesive 8 cannot be effectively prevented.

  In consideration of the above circumstances, the present invention provides an anchor pin capable of effectively preventing the backflow of the injected adhesive by reliably sealing the gap between the driving hole drilled in the outer wall and the anchor pin main body with a sleeve. The purpose is to provide.

  The anchor pin of the present invention is a hollow cylindrical anchor pin main body inserted into a driving hole drilled in a concrete frame from the outer wall, and inserted into the anchor pin main body, and the anchor pin main body is inserted into the driving hole. Later, it is struck from behind, the tip of the anchor pin main body is expanded to bite and fix to the concrete frame, the adhesive inlet formed at the rear end of the anchor pin main body, and from this inlet A lead-out passage for leading the adhesive injected into the anchor pin main body to the outside of the anchor pin main body and the outer periphery of the anchor pin main body, the anchor pin main body being inserted into the driving hole Move to the rear end and seal the gap between the drive hole and the anchor pin body at that position, and then drive when the adhesive is injected Comprising a sleeve to prevent backflow of the adhesive through the gap between the hole and the anchor pin body, a, as the sleeve, characterized in that the metal sleeve is used.

  In the anchor pin of the present invention, a metal sleeve that is harder and more rigid than resin is arranged on the outer periphery of the anchor pin main body. Therefore, when the anchor pin moves on the anchor pin main body, the sleeve is large. It will not be forced to deform. Therefore, unlike the resin sleeve, it does not jump out of the outer wall after being deformed, and the gap between the driving hole and the anchor pin main body can be reliably sealed by the sleeve at an appropriate position. The back flow of the adhesive can be prevented. As a result, the reliability at the time of high pressure injection of the adhesive can be improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1A and 1B are configuration diagrams of an anchor pin 50 according to the embodiment, in which FIG. 1A is a longitudinal sectional view, and FIG. FIG. 2 is a cross-sectional view of the main part showing a state where the anchor pin 50 is driven and inserted into the driving hole 4.

  This anchor pin 50 is a hollow cylindrical anchor pin main body inserted into a driving hole (circular hole) 4 drilled so as to enter the concrete frame 3 (see FIG. 5) from the surface of the outer wall 2. 55 and inserted in the anchor pin main body 55 in advance, and after the anchor pin main body 55 is inserted into the driving hole 4, the anchor pin main body 55 is struck from the rear to the front, thereby expanding the tip of the anchor pin main body 55. A plug 56 that is opened to bite and fix to the concrete housing 3; an adhesive injection port 57 formed at the rear end of the anchor pin main body 55; and an axial intermediate portion of the peripheral wall of the anchor pin main body 55; A lead-out hole 59 for leading the adhesive 8 (see FIG. 6) injected into the anchor pin main body 55 from the injection port 57 to the outside of the anchor pin main body 55; It is fitted to the outer periphery of the pin body 55 and moves to the rear end side of the anchor pin body 55 as the anchor pin body 55 is inserted into the drive hole 4. A metal sleeve 60 that seals the gap 17 and thereby prevents backflow of the adhesive 8 through the gap 17 of the anchor pin body 55 when the adhesive 8 is subsequently injected. ing.

  In this case, at the distal end portion of the anchor pin main body 55, at least a split groove 61 having a predetermined length from the distal end toward the proximal end side is provided in order to facilitate the expansion and to promote the lead-out of the adhesive 8. One (in this embodiment, two at a position 180 degrees apart in the circumferential direction) is provided. Further, around the injection port 57 at the rear end of the anchor pin main body 55, the outer wall 2 is pressed and the sleeve 60 is prevented from coming out to the proximal end side, and the injected adhesive 8 is prevented from leaking. A flange 62 is provided. You may comprise so that the rear end part of the anchor pin main body 55 including the flange 62 may be coat | covered with resin. The peripheral wall on the distal end side of the anchor pin main body 55 has at least one annular concave groove 64 for preventing the plug 56 from coming off toward the distal end side and increasing the frictional force with the driving hole 4 (this embodiment). Then, three are provided in order to alternately form irregularities adjacent in the axial direction. Further, an annular recess 63 for preventing the plug 56 from coming off to the rear end side is provided in the vicinity of the flange 62 on the peripheral wall on the rear end side of the anchor pin main body 55.

  As the material of the anchor pin main body 55, stainless steel (SUS304) having no fear of rust generation and excellent in shear strength is used, and as the material of the sleeve 60, aluminum, brass, copper, or the like is used. A relatively soft metal is used. The reason for using a soft metal for the sleeve 60 is that it is expected to follow the gap 17 between the driving hole 4 and the anchor pin main body 55.

  The sleeve 60 has an inner peripheral surface formed in a straight cylindrical surface shape, and the outer peripheral surface projects slightly outward from a rear end of a small diameter cylindrical portion 60a formed in a tapered surface shape having a gradually decreasing diameter toward the tip. A small flange 60b is integrally provided. The sleeve 60 is formed by machining, plastic working (press work) or the like. In this case, it is preferable to process the sleeve 60 using aluminum which is excellent in workability and is easily available and inexpensive.

  The construction procedure of the outer wall repair work using this anchor pin 50 is exactly the same as described above. However, since the sleeve 60 is made of a metal such as aluminum as described above, the sleeve 60 will not be deformed excessively when moving on the anchor pin body 55 according to the driving of the anchor pin body 55. Therefore, unlike the conventional resin sleeve, it does not jump out of the outer wall 2 after being deformed, and the gap 17 between the driving hole 4 and the anchor pin main body 55 is reliably sealed by the sleeve 60 at an appropriate position. And back flow of the injected adhesive 8 can be prevented. As a result, the reliability at the time of high-pressure injection of the adhesive 8 can be improved. In addition, since the sleeve 60 does not jump out of the outer wall 2, it is possible to reduce the trouble of finally filling the concave portion such as the injection port 57 with a putty to finish the surface of the outer wall 2 flat. That is, the efficiency of the outer wall repair work can be improved.

The structure of the anchor pin main body 50 may be any of the following.
(A) A metal plate cut into a predetermined shape by a press and rolled into a cylindrical shape.
(B) A combination of press-molded semi-cylindrical bodies joined in a cylindrical shape.
(C) Pressed pipe.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the anchor pin of embodiment of this invention, (a) is a longitudinal cross-sectional view, (b) is Ib arrow directional view of (a). It is a principal part expanded sectional view which shows the state which driven the anchor pin of embodiment into the driving hole. It is a side view which shows the external appearance structure of the conventional anchor pin. It is explanatory drawing of the construction process of the conventional anchor pin. It is explanatory drawing of the next process of FIG. It is explanatory drawing of the next process of FIG.

Explanation of symbols

2 outer wall 3 concrete frame 4 driving hole 8 adhesive 17 gap between driving hole and anchor pin body 51 anchor pin 55 anchor pin body 56 plug 57 adhesive inlet 59 outlet hole 60 metal sleeve 61 split groove (leading passage) )

Claims (1)

  A hollow cylindrical anchor pin body to be inserted into the driving hole drilled in the concrete frame from the outer wall, and inserted into the anchor pin main body, and after being inserted into the driving hole, it is struck from behind. A plug for expanding and fixing the tip of the anchor pin body to the concrete frame, an adhesive inlet formed at the rear end of the anchor pin body, and an inside of the anchor pin body from the inlet A lead-out passage for leading the adhesive injected into the outside of the anchor pin main body, and a rear end of the anchor pin main body arranged on the outer periphery of the anchor pin main body as the anchor pin main body is inserted into the driving hole And seal the gap between the driving hole and the anchor pin body at that position, so that when the adhesive is subsequently injected, the driving Comprising a sleeve to prevent backflow of the adhesive through the gap between the hole and the anchor pin body, a, as the sleeve, the anchor pin Siding, wherein the metallic sleeve is used.

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