Abstract: To provide a joining structure that joins at least two or more building members together, in which jig insertion holes into which a joining jig is inserted are provided in the building members, respectively, the joining jig is inserted into the jig insertion holes and an adhesive that fixes the joining jig and the building members together is filled in the jig insertion holes, the joining jig to be inserted into the jig insertion holes includes a cylindrical main body, an intermediate shaft portion, and threaded end portions, and the threaded end portions are provided by rolled threads.

Abstract: To provide a joining structure that joins at least two or more building members together, in which jig insertion holes into which a joining jig is inserted are provided in the building members, respectively, the joining jig is inserted into the jig insertion holes and an adhesive that fixes the joining jig and the building members together is filled in the jig insertion holes, the joining jig to be inserted into the jig insertion holes includes a cylindrical main body, an intermediate shaft portion, and threaded end portions, and the threaded end portions are provided by rolled threads.

Abstract: A circuit board comprising a resin molded article which includes a metal powder coated by an insulation film and a metal conductor which is formed by metal deposition over a circuit pattern drawn by laser beam irradiation on the surface of the resin molded article through electroless plating, and the method of producing the same.

Abstract: An improved fire detector unit has a plastic base defining a smoke chamber for detection of a smoke density in terms of light scattering due to the smoke particles in the smoke chamber. The base carries a circuit board mounting a light emitting element, a light receiving element, and other components forming a fire detecting circuit responsible for generating a fire warning signal based upon the detected smoke density. A metal-made electromagnetic shield is molded into the base to protect the light receiving element from electromagnetic radiation noises. The electromagnetic shield includes a ground terminal for connection with a ground line of the circuit board. In addition, terminal pins are molded into the base for electrical and physical connection of the circuit board to the base.

Abstract: A circuit board comprising a resin molded article which includes a metal powder coated by an insulation film and a metal conductor which is formed by metal deposition over a circuit pattern drawn by laser beam irradiation on the surface of the resin molded article through electroless plating, and the method of producing the same.

Abstract: A method of fabricating various models of fire detectors only from a limited number of common parts or unit in accordance with user's specific needs but at a reduced cost. The method utilizes a smoke sensor unit (1), a thermal sensor unit (2), a signal processing unit (3), a signal transmission unit (4), and a power unit (5), and then combines at least one of the smoke sensor unit and the thermal sensor unit with the power unit and optionally with at least one of the signal processing unit and the signal transmission unit.

Abstract: A method of fabricating various models of fire detectors only from a limited number of common parts or unit in accordance with user's specific needs but at a reduced cost. The method utilizes a smoke sensor until (1), a thermal sensor unit (2), a signal processing unit (3), a signal transmission unit (4), and a power unit (5), and then combines at least one of the smoke sensor unit and the thermal sensor unit with the power unit and optionally with at least one of the signal processing unit and the signal tansmission unit.

Abstract: An improved fire detector unit has a plastic base defining a smoke chamber for detection of a smoke density in terms of light scattering due to the smoke particles in the smoke chamber. The base carries a circuit board mounting a light emitting element, a light receiving element, and other components forming a fire detecting circuit responsible for generating a fire warning signal based upon the detected smoke density. A metal-made electromagnetic shield is molded into the base to protect the light receiving element from electromagnetic radiation noises. The electromagnetic shield includes a ground terminal for connection with a ground line of the circuit board. In addition, terminal pins are molded into the base for electrical and physical connection of the circuit board to the base.