JPH0650602Y2 - Pin for injecting adhesive on the wall - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a pin for injecting an adhesive agent into a wall surface, which is used for injecting an adhesive agent between a concrete wall and a mortar layer formed on this wall. Regarding

(Prior Art) As a surface finish for a concrete wall, a mortar layer having a predetermined thickness is formed on the concrete wall.

However, after solidification of the concrete wall, the adhesive strength of the mortar layer formed on the concrete wall to the concrete wall surface cannot be put to practical use only by the adhesive strength of the mortar itself, so the joint surface between them (hereinafter referred to as the interlayer) A so-called pinning method is used to increase the peel strength by injecting an adhesive.

This pinning method waits for temporary solidification of the mortar layer on the concrete wall, takes an appropriate range (area), and pierces a large number of small holes from the surface of the mortar layer to the concrete wall. An adhesive is injected through the layer to penetrate between layers, and after the adhesive is injected, a stop pin is inserted into the small hole and the adhesive remaining in the small hole is solidified and embedded.

(Problems to be Solved by the Invention) The injection of the adhesive in the above-described conventional pinning method is performed by directly connecting the adhesive injection device to the small hole opening on the surface of the mortar layer.

Considering the interpenetrating action of the adhesive at this time, the pressure from the injector side is applied to the small holes in a state where the adhesive is filled, and during the short time when this pressure reaches the maximum value. The adhesive penetrates into the layers.

Therefore, according to the conventional pinning method described above, the adhesive that fills the small holes at the time of injecting the adhesive forms one adhesive pillar, and the adhesive pillar is bonded under the pressure applied to the adhesive pillar. Since the adhesive shunts from around the agent column and permeates between layers, the permeation range of the adhesive between layers (not uniform around the small holes) depends on the pressure applied to one adhesive column as a whole. It is decided.

In addition, since the pin embedded in the small hole is to be solidified by being inserted into the adhesive remaining in the small hole after the adhesive is injected, when the adhesive is solidified, air bubbles or the like are generated on the pin surface. Occurrence occurs and the adhesion strength with the pore wall decreases.

The present invention has been made in view of the above-mentioned point, and a pin embedded in a small hole after the adhesive is injected is used for injecting the adhesive to expand the penetration range of the adhesive between the layers around the small hole. At the same time, it is an object of the present invention to provide a pin for injecting an adhesive agent into a wall surface in which the solidification strength of the pin left in the small hole is also increased and the peel strength of the mortar layer is remarkably improved.

(Means for Solving the Problem) The gist of the present invention for achieving the above object is to inject an adhesive between the concrete wall and the mortar layer formed on the concrete wall. There is a pin body with multiple spiral grooves engraved on the peripheral surface, and a protruding edge is provided on the intermediate peripheral surface to separate the pin hole insertion part and the injector connection port, and the pin is in contact with the protruding edge base part. A hole is formed on the peripheral surface of the hole insertion part, and the injection hole is formed in the body. The base of the pin body is fitted integrally with the injection hole of the base from the side of the pin hole insertion part. A pin for injecting an adhesive agent to a wall surface is characterized in that an annular packing is fitted in contact with the projecting edge.

(Operation) This invention is configured as described above. When the pin main body is inserted into the small hole reaching the concrete wall from the mortar layer and the adhesive is injected by connecting the pin main body through the mouthpiece, the small hole is formed. The adhesive flowing out between the peripheral surface of the pin body and the wall of the small hole forms a plurality of spirally flowing adhesive flow strips, and the injection pressure from the injector side causes each adhesive flow. The adhesive is uniformly added to each strip, and the adhesive permeates from each adhesive flow strip to the corresponding interlayer portion to realize a wide range of permeation.

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

In the figure, reference numeral 1 denotes a pin body, which is made of a stainless steel material or the like, and is provided with a plurality of spiral grooves 2 on its peripheral surface.

Reference numeral 3 is a mouthpiece, and a protruding edge 4 is provided on the intermediate peripheral surface of the base.
One side of the pin hole is inserted into the pin hole insertion portion 5, the other side is divided into the injector connection port portion 6, and the groove 4 is provided on the peripheral surface of the pin hole insertion portion 5 in contact with the projecting edge 4 to penetrate the body. The injection hole 8 is provided.

Thus, the injection hole 8 of the mouthpiece 3 has a small diameter on the injector connection opening 6 side and a large diameter on the pin hole insertion portion 5 side. The base portion of the pin body 1 is fitted to the pin 8 to integrate them.

Reference numeral 9 denotes an annular packing fitted in the pin hole insertion portion 5, which is in the concave groove portion 7 and is in contact with the projecting edge 4.

To inject an adhesive using this device constructed as described above, do the following.

From the surface of the mortar layer B to the concrete wall A, a large number of small holes C having a diameter slightly larger than the diameter of the pin body 1 are formed.

When the pin of the present invention is inserted into the small hole C described above, the pin body 1 is loosely inserted into the small hole C, and the pin hole insertion portion 5 of the mouthpiece 3 has a diameter substantially the same as that of the small hole C. Fits into the mouth of the small hole C with almost no gap formed therein, and the annular packing 9 is airtightly adhered to the surface of the mouth of the small hole C.

In this state, when the injector connection port portion 6 of the base 3 is connected to an adhesive injector (not shown) and the adhesive is injected, the adhesive is injected from the injection hole 8 in the base 3 to the spiral on the peripheral surface of the pin body 1. A plurality of adhesive fluid strips that flow in a spiral shape flow out into the gap between the groove 2 and the wall of the small hole C, and the adhesive permeates the corresponding layers from these adhesive fluid strips. To go.

When the injection of the adhesive is completed in this way, the injector connection opening 6 of the mouthpiece 3 protruding outside the mortar layer B is hammered and broken off from the concave groove 7 to leave the pin main body in the small hole C. Leave 1 as is to solidify the adhesive.

(Effect) According to the present invention configured as described above, the following effects are obtained.

(1) For the small holes reaching the concrete wall from the surface of the mortar layer, the adhesive is injected through the mouthpiece that presses the annular packing on the mouth surface of the small holes and adheres hermetically. Therefore, compared to the conventional construction method in which the injector is directly joined to the small hole mouth, there is no leakage of the injection pressure and the high pressure is maintained to enable reliable injection.

(2) The adhesive flowing in the gap between the spiral groove on the peripheral surface of the pin body and the wall of the small hole in the small hole is spiral and forms a plurality of adhesive flow strips. Since the adhesive penetrates into the layers from the flow strips, a uniform high-pressure injection pressure is applied to each adhesive flow strip from the injector side to expand the permeation range centering on the small holes. .

(3) After the adhesive is injected, even if the adhesive injector is removed from the mouthpiece, the adhesive remaining between the spiral groove on the peripheral surface of the pin body and the small hole wall in the small hole flows backward to the mouthpiece side. Shows high flow resistance, and the pin hole insertion part of the mouthpiece is fitted in the small hole mouth portion, and the gap between the injection hole in the mouthpiece and the spiral groove on the peripheral surface of the pin body is small, Since it is difficult for the adhesive to leak to the outside of the base, the adhesive remaining in the small holes solidifies with some pressure during injection, and no bubbles are generated on the peripheral surface of the pin body. Greatly increases the peel strength of the mortar layer.

[Brief description of drawings]

FIG. 1 is a front view in which a part of the invention is omitted, and FIG. 2 is a partial sectional view showing a use state. 1 ... pin body, 2 ... spiral groove, 3 ... base, 4 ... ridge, 5 ...
Pin hole insertion part, 6 ... injector connection port part, 7 ... concave groove, 8 ... injection hole, 9 ... annular packing.

Claims (2)

[Scope of utility model registration request] 1. A method of injecting an adhesive between a concrete wall and a mortar layer formed on the concrete wall, comprising a pin body having a plurality of spiral grooves engraved on its peripheral surface, and an intermediate circumference. A protrusion is provided on the surface to separate the pin hole insertion part and the injector connection port, and a groove is provided on the peripheral surface of the pin hole insertion part in contact with the protrusion base to allow the injection hole to penetrate the body. The pin body base is integrally fitted to the injection hole of the die from the side of the pin hole insertion portion, and the ring packing is fitted to the pin hole insertion portion in contact with the projecting edge. Agent injection pin. 2. The pin for injecting an adhesive agent into a wall surface according to claim 1, wherein the pin body is made of stainless steel.