Abstract: In a joint method for a reinforcing bar using a reinforcement joint having a grout inlet at one end and a grout outlet at the other end, the grout inlet is fitted with a sealing body provided with a check valve, and the grout outlet is fitted with a sealing plug provided with a piston body which is moved outward when the reinforcement joint is filled with grout, whereby the filling of the reinforcement joint can be visually confirmed.

Abstract: In a joint method for a reinforcing bar using a reinforcement joint having a grout inlet at one end and a grout outlet at the other end, the grout inlet is fitted with a sealing body provided with a check valve, and the grout outlet is fitted with a sealing plug provided with a piston body protruded outward by the filling of a grout, whereby the filling of the grout can be visually confirmed.

Abstract: A compact rice cooker with excellent rice cooking performance while preventing boiling-over is presented. This rice cooker includes a main body 31, a lid for covering the top of the main body, an inner pan detachably accommodated in the main body, a bottom heating coil for induction heating of the inner pan, a control unit for controlling high frequency power to be supplied to the bottom heating coil, and a rice gruel detecting unit disposed in a steam tube of the lid, and therefore electric power supply is controlled by the control unit depending on the detection state by the rice gruel detecting unit. The rice gruel detecting unit makes use of movement of the float due to the rise of rice gruel, and the lid is formed in a compact size, and boiling-over is prevented, so that tasty rice can be cooked.

Abstract: A compact rice cooker with excellent rice cooking performance while preventing boiling-over is presented. This rice cooker comprises a main body 31, a lid 36 for covering the top of the main body 31, an inner pan 32 detachably accommodated in the main body 31, a bottom heating coil 33a for induction heating of the inner pan 32, control means for controlling high frequency power to be supplied to the bottom heating coil 33a, and rice gruel detecting means disposed in a steam tube 47 of the lid 36, and therefore electric power supply is controlled by the control means depending on the detection state by the rice gruel detecting means. The rice gruel detecting means makes use of move of the float 48 due to rice gruel, and the lid 36 is formed in a compact size, boiling-over is prevented, so that tasty rice can be cooked.

Abstract: A compact rice cooker with excellent rice cooking performance while preventing boiling-over is presented. This rice cooker comprises a main body, a lid for covering the top of the main body, an inner pan detachably accommodated in the main body, a bottom heating coil for induction heating of the inner pan, a control unit for controlling high frequency power to be supplied to the bottom heating coil, and a rice gruel detector disposed in a steam tube of the lid, and therefore electric power supply is controlled by the control unit depending on the detection state by the rice gruel detecting means. The rice gruel detector makes use of move of the float due to rice gruel, the lid is formed in a compact size, and boiling-over is prevented, so that tasty rice can be cooked.

Abstract: A rice cooker does not cause malfunction if the operation unit is touched by mistake when closing the lid, and is capable of preventing boil-over without lowering the rice cooking performance. The rice cooker includes a main body, a lid for covering the top of the main body, an inner pan detachably accommodated in the main body, a heater for induction heating of the inner pan, a controller for controlling the supply of high frequency power to the heater, an operating unit, and a lid opening and closing detector or a rice gruel detector disposed in a steam tube of the lid. The controller inhibits operation signal input of the operating unit when detecting an open state of the lid, and controls the power supply to the heater when detecting a rise in the rice gruel. Therefore, the rice cooker prevents a wrong input in rice cooking when opening or closing the lid, and prevents boil-over of the rice gruel.

Abstract: A crimped multifilament composed of a thermoplastic polymer, wherein a birefringence index measured at an outer layer of a filament constituting said multifilament is larger than that of a birefringence index measured at a central portion of the filament, and said filament has a distribution in which a position having a smallest value of the birefringence index deviates from the center axis of the filament and random crimps of 10 per inch or more.A crystal growth rate measured by a wide-angle X-ray diffractometry is 0.2 or more for a polyamide crimped multifilament and 0.4 or more for a polyester crimped multifilament.A preferable method for manufacturing the crimped multifilament is that a multifilament extruded from. a spinneret (2) is applied with an aqueous liquid (5) to one side thereof up to state that a temperature of the multifilament becomes to a predetermined temperature, the obtained multifilament is drawn at the drawing ratio between 1.0 and 1.