Patent ID: 8579216

Claim:
An adhesive injector made up of an injection nozzle and an injector main body for use in a pinning method, the injection nozzle being adapted to be mounted on the injector main body while in use, the pinning method being performed by injecting an adhesive into a charging hole bored into a framework to a predetermined depth through a finishing material, the injection of the adhesive being made while sealing an opening portion of the charging hole, the injection nozzle comprising: a connection arm mounted on the injector main body and having an adhesive passage in communication with the injector main body; a nozzle outer cylinder supported by the connection arm and having therein an intermediate passage in communication with the adhesive passage, the nozzle outer cylinder also having at a front end thereof a sealing member for sealing the opening portion; a nozzle inner cylinder elongating through the sealing member and being slidably supported inside the nozzle outer cylinder, the nozzle inner cylinder having (1) an injection passage communicating with the intermediate passage through a communication opening, the injection passage formed at a rear end portion of the nozzle inner cylinder and, (2) at a front end portion of the nozzle inner cylinder, an adhesive discharge port communicating with the injection passage; a reinforcing member fixed to fit on the rear end portion of the nozzle inner cylinder, the reinforcing member being internal to the nozzle outer cylinder; and an operation member capable of moving the nozzle inner cylinder at any position between an advanced position where the adhesive discharge port lies deep inside the charging hole and a receded position where the adhesive discharge port lies shallow inside the charging hole, wherein the communication opening is formed so as to pass through peripheral surfaces of the reinforcing member and the inner cylinder main body at the rear end portion of the nozzle inner cylinder, the operation member is connected to the rear end portion of the nozzle inner cylinder, the operation member being a rod-shaped member elongating through a rear end portion of the nozzle outer cylinder, and under the condition that the adhesive is injected into the charging hole, the adhesive passage, the intermediate passage and the injection passage are configured to always be in communication with one another.