JPH046457Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a repair anchor used when repairing a concrete structure, particularly an outer wall, by a pinning method.

<Conventional technology> As is well known, concrete structures include buildings, structures, etc. In the case of buildings, an outer wall is provided by applying mortar or pasting tiles to the outer surface of the concrete frame, and a decorative finish is applied. is being carried out.

However, over a long period of time, the mortar will lift up from the building structure, causing gaps, and in extreme cases, parts of the outer wall will separate from the building structure and fall, causing accidents that may hit people below the building. Not only is this dangerous, but it is also extremely unsightly.

Therefore, conventionally, after a certain period of time has passed after construction, the state of deterioration of the exterior wall is measured using a measuring device that uses X-rays, etc., and whether there is any need for repair or renovation, whether the exterior wall should be completely renovated, or repaired using the pinning method. I was deciding whether to do it.

The above-mentioned pinning method is used to repair the parts of the outer wall that have risen from the building structure and have gaps. Basically, a blind hole is made with a drill or the like from the outer wall toward the structure, and then a wire brush or After thoroughly removing chips and cleaning the inside of the hole using a blower or the like, a pin is inserted into the hole and a hardening agent made of epoxy resin or the like is injected under high pressure to cure the hole.
According to this pinning method, the hardening agent injected into the hole at high pressure flows out and fills the gap between the building frame and the outer wall, but it does not flow out over a wide area, so it must be carried out at appropriate intervals vertically and horizontally. Must be. Then, once the solidifying agent has cured, the frame and the outer wall are firmly integrated by the interposition of the pins, so the open end of the blind hole is then filled with mortar or the like for post-treatment. If the exterior wall is made of tiles, blind holes are drilled at the joints and the pinning method is used.

The conventional pin used in the above-mentioned pinning method is a stainless steel rod with a male thread carved on the outer periphery.

<Problem to be solved by the invention> However, even if a concrete structure is repaired by the pinning method using the pins as described above, the diameter and length of the pins cannot be changed at the repair site. Therefore, when the depths of the blind holes to be drilled differ, it is necessary to prepare pins of various lengths at the repair site, which is uneconomical.

Further, the pins are only embedded in the solidifying agent that bonds the frame and the outer wall, and are not fixed in the blind holes. Therefore, the effect of repairing the outer wall cannot be sufficiently enhanced.

<Means for Solving the Problems> The present invention consists of a synthetic resin cylindrical material having a central hole with a polygonal cross-sectional shape in the longitudinal direction. A collar member comprising a plurality of inner grooves and a plurality of outer grooves formed along the length direction on the outer surface of the cylindrical member, the inner grooves and the outer grooves being arranged alternately, and a central hole of the collar member. a pin member having an outer diameter slightly larger than the diameter of the inscribed circle of the collar member, having a tapered insertion end at one end and a large diameter head at the other end, and capable of being inserted into the central hole of the collar member;
It consists of

<Function> The diameter of the collar member fitted into the blind hole of the building structure expands by inserting the pin member and comes into pressure contact with the inner surface of the blind hole, and the injected solidifying agent solidifies to strengthen the building body and the outer wall. The collar member and pin member support the outer wall.

<Example> The present invention will be explained below with reference to embodiments of the drawings.

The repair anchor according to the present invention includes a cylindrical collar member made of synthetic resin and a metal pin member inserted into the collar member.

The collar member 1 is made of a synthetic resin tube, and has a polygonal, for example, hexagonal central hole 2 in the length direction of the central part, and a collar extending from each vertex 3 of the central hole 2 on one side. Six inner grooves 4 are provided in a spiral shape toward the outer circumferential direction of the member 1. On the other hand, on the outer surface of the collar member 1, a plurality of outer grooves 5 are provided in parallel along the length direction, alternating with the inner grooves 4, 4.
Therefore, in this embodiment, six outer grooves 5 are arranged in a spiral shape between the inner grooves 4. Further, on the outer surface of the collar member 1, stepped portions 6 are provided in the length direction so as to be located between the adjacent outer grooves 5, 5, so the outer grooves 5 and the stepped portions 6 are arranged alternately. .
Further, the outer peripheral portion of one end of the collar member 1 is chamfered to form an inclined portion 7.

The pin member 8 described above is a nail-shaped member made of metal, and its outer diameter is equal to the center hole 2 of the collar member 1 described above.
slightly larger than the diameter of the inscribed circle of Therefore, when the pin member 8 is inserted into the center hole 2 of the collar member 1, each inner groove 4 and outer groove 5 are deformed, and the collar member 1
expands in diameter. Further, one end of the pin member 8 has a tapered insertion end 9, and a head 10 having a larger diameter than the pin member 8 is formed at the other end.

Below, a case will be described in which the outer wall of a concrete frame is repaired using the repair anchor according to the present invention as described above.

First, the outer wall b rises from the frame a, and the gap c
Drill a blind hole d in the area where this occurs from the outer wall b side toward the frame a with a drill whose inner diameter is slightly smaller than the outer diameter of the collar member 1, and remove chips etc. with a vacuum cleaner. Clean the inside of the blind hole d.

Next, the collar member 1 is inserted into the blind hole d from the tapered inclined portion 7 side. At this time, since the inner diameter of the blind hole d is slightly smaller than the outer diameter of the collar member 1, the collar member 1 contracts in diameter toward the center and is fitted so that the outer surface of the collar member 1 and the inner surface of the blind hole d are in pressure contact. It will be worn. If the blind hole d is deeper than the entire length of the collar member 1, use a driving rod (not shown) to insert the collar member 1 into the blind hole d.
Just push it all the way inside.

Then, the nozzle 11 is made to face the open end e of the blind hole d, and a solidifying agent 12 made of epoxy resin or other material is injected into the blind hole d under high pressure. The solidifying agent 12 passes through the central hole 2 and each outer groove 5 of the collar member 1, fills the inner circumference of the blind hole d, and is further press-fitted into the gap c.

Once the solidifying agent 12 is filled, the nozzle 11 is removed, the pin member 8 is driven into the center hole 2 of the collar member 1 from the open end e, and the open end e is closed with the head 10. In this case, if the head 10 of the pin member 8 is made to have approximately the same diameter as the inner diameter of the blind hole d, the open end e will be sealed with the head 10 of the pin member 8, and the solidifying agent 12 will not flow out. .

When the pin member 8 is inserted after injecting the solidifying agent 12 into the blind hole d in this way, the solidifying agent 12 corresponding to the volume of the pin member 8 is pushed away within the blind hole d, and the displaced solidifying agent 12 is further press-fitted into the gap c, and the adhesion between the frame a and the outer wall b becomes even stronger.

On the other hand, the diameter of the collar member 1 is expanded by the insertion of the pin member 8, and the collar member 1 is further crimped and fixed within the blind hole d. In this case, the pin member 8 does not need to be completely inserted to the deep part of the collar member 1, and the collar member 1 is crimped and fixed in the blind hole d, and the head 10 of the pin member 8 is at the open end of the blind hole d. If the anchor of the present invention can be sealed, the anchor of the present invention can fully perform its function.

Therefore, according to the present invention, regardless of the depth of the blind hole d drilled in the frame a, a wide range of depths can be formed by adjusting the length of the pin member 8 and the driving depth of the pin member 8. It can correspond to hole d.

In the above explanation, the pin member 8 is inserted into the collar member 1 after the solidifying agent 12 is injected into the blind hole d, but the anchor of the present invention inserts the pin member 8 into the collar member 1 fitted into the blind hole d. It is also possible to insert the solidifying agent 12 into the blind hole d and then press fit the solidifying agent 12 into the blind hole d. Even in this case, the solidifying agent 12 can pass through the outer groove 5 and the stepped portion 6 of the collar member 1, so that it sufficiently reaches the gap c and bonds the frame a and the outer wall b.

FIG. 6 and subsequent figures show another embodiment of the present invention, in which a rubber stopper 13 is attached to the open end e of the blind hole d. The rubber stopper 13 includes a thin film 15 provided inside an elastic annular member 14.
5 is provided with a cross-shaped cut 16, through which a nozzle 11 for injecting the solidifying agent 12 can be inserted. Further, the outer peripheral surface of the rubber stopper 13 is provided with a non-slip surface 17 made of a fine rough surface.
Note that the cut 16 does not need to be provided in advance, and may be opened by inserting the nozzle 11.

When using the rubber stopper 13 as described above, after cleaning the inside of the blind hole d as described above, the collar member 1 is inserted into the blind hole d, and the rubber stopper 13 is fitted into the open end e. Next, insert the nozzle 11 into the notch 16 of the rubber stopper 13.
The solidifying agent 12 is press-fitted. Then, the notch 16 in the thin film 15 is opened by the pressure of the solidifying agent 12, and the solidifying agent 12 is injected into the blind hole d and the gap c. When the injection is completed, the nozzle 11 is removed, but the rubber stopper 13 prevents the solidifying agent 12 from flowing out. Then, when the pin member 8 is inserted into the collar member 1 through the thin film 15 of the rubber stopper 13, the collar member 1 expands in diameter and is crimped into the blind hole d, and the pin member 8 The solidifying agent 12 that was pushed away is further press-fitted to the gap c between the frame a and the outer wall b.
are firmly bonded.

By using the rubber stopper 13 as described above, not only can the opening end e of the blind hole d be more completely sealed, but also
The head 10 of the pin member 8 can be made small, making it inexpensive, and furthermore, an ordinary nail can be used in place of the pin member 8, making it extremely economical.

<Effects of the Invention> According to the repair anchor of the present invention, it is possible to provide an anchor with excellent strength that combines the advantages of both metal anchors and chemical anchors. In other words, against tension, physical strength is obtained by pressure bonding between the collar member and the blind hole provided in the frame, and chemical strength is obtained through solidification of the solidifying agent, and against shear, the strength of the resin of the collar member itself and the pin member are obtained. The metal strength possessed by the metal can be obtained.

In addition, since the collar member is provided with an outer groove and an inner groove, the solidifying agent can be easily distributed, and the solidifying agent is sufficiently injected through the grooves to the space between the frame and the outer wall, which ultimately improves the reinforcing effect of the outer wall. .

Furthermore, the anchor of the present invention can not only be manufactured at low cost, but also eliminates waste of solidifying agent.
It is extremely economical because one anchor can cover blind holes of a wide range of depths.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is an exploded perspective view, Fig. 2 is a left side view, Figs. 3 to 5 are explanatory diagrams of the pinning method using an anchor according to the invention, and Fig. 6 is a The perspective views of the rubber stopper and FIGS. 7 to 9 are explanatory views of other embodiments. DESCRIPTION OF SYMBOLS 1... Collar member, 2... Center hole, 4... Inner groove, 5... Outer groove, 8... Pin member, 9... Insertion end, 10... Head, 13... Rubber stopper.

Claims (1)

[Claims for Utility Model Registration] A tubular material made of synthetic resin having a central hole with a polygonal cross-sectional shape in the longitudinal direction, and a plurality of inner grooves formed along the longitudinal direction on the inner surface of the tubular material. , a collar member comprising a plurality of outer grooves formed along the length direction on the outer surface of the cylindrical member, the inner grooves and the outer grooves being arranged alternately; and an inscribed circle of the central hole of the collar member. a pin member having an outer diameter slightly larger than the diameter, having a tapered insertion end at one end and a large diameter head at the other end, and being insertable into the central hole of the collar member. Anchors for repairing concrete structures.