JPS6113060B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for protruding and fixing an anchor bolt to a structure such as a concrete ceiling, in which most of the anchor to which the bolt is screwed is inserted into the structure and fixed by adhesive. It is.

Conventionally, anchor bolts and the like are attached to structures by embedding the bases of the anchor bolts at the same time as concrete pouring or when the concrete is in a softened state, and then fixing them to the structure as the concrete hardens. However, if there are voids in the concrete where the anchor bolt is inserted, the strength of that part is weak, making it difficult to hold the installed anchor bolt securely and making it easy to pull out. It was dangerous to fall. By the way, since voids, so-called cavities, in the concrete structure are likely to occur during concrete pouring, and therefore the bolts often come off, there has been a strong demand for a method for fixing anchor bolts that prevents this.

In view of the above-mentioned drawbacks of the conventional ones, the present invention has been improved and eliminated by fixing the bolt-attached anchor to the structure using an adhesive, which facilitates the work and provides a strong fixation. The purpose of this invention is to provide an anchor adhesive fixation method that can be used.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the configuration of the present invention shown in the drawings will be described below.

First, as shown in FIG. 6, the anchor bolt 1 is configured to be attached by screwing into a threaded portion 2a formed on the inner surface of the end of a pipe-shaped anchor 2. Most of it is buried and fixed with adhesive.

In addition, as shown in the figure, the anchor 2 has a plurality of elongated grooves 3 cut in the pipe wall at its tip end from its mouth edge in the axial direction of the pipe, or a plurality of cuts are carved in the outer circumferential surface, and the anchor bolt 1 A threaded portion 2a for screwing the anchor 2 is formed at the rear end.The anchor 2 is fixed with adhesive as follows. Anchor 2 of structure A as shown in Figure 1.
A holding hole 4 having a diameter slightly larger than the pipe diameter of the anchor is bored at the attachment point. Next, after cleaning this holding hole 4, a fixing member 5 is fitted into the deep part of the hole as shown.
As shown in FIG. 4, the fixing member 5 is a hard member in the shape of a truncated cone, for example, with a tapered peripheral surface, and its large-diameter circular surface has approximately the same diameter as the holding hole 4, and is oriented toward the inner part of the hole. and insert it. To fit this fixing member 5, push the small diameter side of this slightly into the pipe end opening of the anchor 2 and hold the member 5 with the anchor 2, and in this state until the holding and fixing member 5 comes into contact with the deep part of the hole. Insert the anchor 2 into the holding hole 4. The anchor 2 is placed in the above-mentioned inserted state, and the rear end of the anchor 2 is struck or driven in. By this driving operation, the tip of the anchor 2 is pushed into the tapered surface of the fixing member 5 in a wedge shape and is firmly fitted while expanding at the plurality of elongated grooves 3 or cuts formed in the tube wall. , and the tip of the expanded piece of the tip portion that is driven in slightly bites into the structure A. As a result, the anchor 2 is mechanically fixed to the structure A via the fixing member 5, so that the anchor 2 is firmly fixed even if oil or the like is attached to the structure. FIG. 1 shows the mechanically fixed state of this anchor 2. In this state, the stepped groove 3 of the tip of the anchor 2 is detached from the fixing member 5, and the through hole 3 is inserted into the holding hole 4. ', and its rear end slightly protrudes outward from the entrance of the holding hole 4.

When inserting and fixing the anchor 2, as shown in the figure, a rubber packing 6 is fitted onto the anchor 2 to seal the entrance of the holding hole 4, and a check valve 7a is installed deep inside the threaded part 2a on the inner surface of the rear end of the anchor. A rubber packing 7 having a supply hole 7b in the center is fitted and fixed. The above rubber packing 6 is attached after inserting the anchor, and the rubber packing 7 with a check valve is installed after the anchor is inserted.
is built into the anchor itself in advance.

Next, as shown in FIG. 2, the nozzle 8 of the adhesive supply pipe is inserted into the supply hole 7b of the rubber packing 7 inside the anchor.
The adhesive 9 is inserted into the anchor 2, and the check valve 7a is pushed open, and the adhesive 9 is press-fitted into the pipe of the anchor 2. As a result, the adhesive 9 is filled into the anchor 2 while cutting into the elongated groove 3.
The gap 4' between the inner surface of the holding hole 4 and the outer peripheral surface of the anchor 2 is filled through the through hole 3'. In this case, since the entrance of the holding hole 4 is sealed by the rubber packing 6, the filling agent surrounds the anchor 2 within the holding hole 4 without flowing out to the outside. After filling the adhesive, the nozzle 8 of the supply pipe is removed from the supply hole 7b of the rubber packing 7. The supply hole 7b is closed by a check valve 7a. The adhesive to be used is an epoxy resin or the like, and should have a low viscosity. This means that even if a low viscosity adhesive is used, the adhesive is strongly press-fitted due to the sealing of the holding hole 4 by the rubber packing 6 and the closing of the supply hole by the check valve 7a of the rubber packing 7 in the anchor 2, and the nozzle 8 can be removed. However, there is no leakage to the outside, and the work can be carried out smoothly. Since it is a low viscosity adhesive, the anchor 2 can be securely fixed due to its good permeability. After the adhesive has been press-fitted and supplied, the anchor bolt 1 is screwed onto the anchor 2 after the nozzle 8 pulled out from the supply hole 7b of the rubber packing 7. That is, the state shown in FIG. 3 is reached, and the bolt attachment to the adhesively fixed anchor 2 is completed.

The fixing member may have a flat tapered surface as in the above embodiment, but in order to smoothly fill the holding hole 4 with adhesive, the tapered surface may have a narrow width as shown in FIG. A member 5a is formed with a plurality of grooves 10, and these grooves 10 are used as guide paths for press-fit adhesive.

As explained above, the anchor is made into a pipe with multiple cuts or slotted slots formed in the axial direction to manage the tip end, and a screw for bolt attachment on the inner peripheral surface of the rear end. A first step of drilling a hole for inserting and holding the anchor with a diameter slightly larger than that of the anchor, and inserting a truncated cone-shaped fixing member into the pipe end opening of the anchor slightly from its small diameter part and holding it; A second step of fitting a rubber packing onto the anchor and also fitting a rubber packing having a supply hole with a check valve inside the rear end of the pipe, and inserting the anchor into the holding hole and abutting the fixing member to the deep part of the hole. The tip of the anchor is firmly fitted into the fixing member by driving, the rear end is slightly protruded from the holding hole, and the third step is to seal the holding hole with the fitting rubber packing, and from the supply hole with check valve of the rubber packing. The process consists of press-fitting the adhesive and filling it between the anchor and the holding hole.The adhesive is applied in numerical order, first mechanically fixed, and then the anchor is enclosed in order to solidify the space created by this process. The anchor is adhesively fixed to the structure using an adhesive made of low viscosity resin, and this fixation is extremely strong due to the use of an adhesive made of low viscosity resin. It also strengthens the existing nests and any weakening caused by this construction, making the ceiling safer from this point of view.

Furthermore, in the present invention, the holding hole and anchor inlet are closed by rubber packing, so that the low-viscosity adhesive does not leak out during press-fitting or after filling, and the work can be done reliably and easily under strong press-fitting. It will be done. Furthermore, according to the present invention, since it is possible to use a low viscosity adhesive, the press-fitted adhesive surrounds the anchor and fills the holding hole, and also easily penetrates into the nested part of the structure, so that the structure is not damaged as described above. It also has a strengthening effect.

The present invention is extremely effective not only for attaching anchor bolts to structures such as concrete walls, but also to structures such as ceilings that have nests and are at high risk of falling concrete parts. It can be fixed safely and firmly.

[Brief explanation of the drawing]

Figures 1 to 3 are partially cross-sectional side views showing the main points of the construction method of the present invention, in which Figure 1 shows the state in which the anchor is driven into the holding hole of the structure, and Figure 2 shows the state in which the adhesive is in place. FIG. 3 shows the press-fitting supply procedure, and FIG. 3 shows the adhesively fixed state of the anchor, and FIGS. 4 and 5 are examples of the fixing member used in the construction method of the present invention. FIG. Figure A is a plan view of another example.
Figure B is a front view thereof, and Figure 6 is a partially sectional side view showing an example of the anchor. DESCRIPTION OF SYMBOLS 1... Anchor bolt, 2... Anchor, 2a... Threaded part of anchor, 3... Elongated groove, 4... Holding hole, 5...
Fixing member, 6, 7... Rubber packing, 7a... Check valve, 7b... Supply hole, 9... Adhesive.

Claims (1)

[Claims] 1 The anchor is made into a pipe with multiple cuts or slotted grooves formed in the axial direction on the pipe wall at the tip, screws for bolt attachment are provided on the inner peripheral surface of the rear end, and the anchor is inserted into the structure. A first step of drilling a holding hole with a diameter slightly larger than that of the anchor;
A truncated conical fixing member is slightly inserted into the pipe tip of the anchor from its small diameter part to hold it, a rubber packing is fitted onto the anchor, and a supply hole with a check valve is provided inside the pipe rear end port. The second step is to fit the rubber packing, insert the anchor into the holding hole, bring the fixing member into contact with the deep part of the hole, force the tip of the anchor into the fixing member by driving, and insert the rear end slightly from the holding hole. A third step of protruding the adhesive and sealing the holding hole with the fitted rubber packing, and a fourth step of press-fitting the adhesive from the supply hole with a check valve in the rubber packing and filling it between the anchor and the holding hole. A method for adhering and fixing anchors for a structure, which comprises constructing the anchors in numerical order, first mechanically fixing them, and then filling and fixing the spaces created by the construction with an adhesive.