Abstract:
PROBLEM TO BE SOLVED: To provide a screw nail applicable to an automatic nailing machine, giving little damage to the wooden material of a construction object, capable of obtaining a larger fastening force, and easy to be pulled out through driver operation. SOLUTION: The screw nail for an automatic nailing machine is provided with a driver hole 3 at its head part 1 and also provided with a screw 4 and a wire connection part 6 at its shaft part 2. The driver socket 3 is a square one. The screw 4 is a double-start male screw with a lead angle a of 55-60 degrees. The thread angle C 1 on the distal end side is set to 55-65 degrees, and a thread angle C 2 on the head part side is set to 15-25 degrees. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an inexpensive heat radiating tubular body with an excellent heat radiation property, and to provide a heat radiation structure. SOLUTION: The heat radiating tubular body 1 is provided with an outer tubular body 2 and a plurality of inner tubular bodies 31 to 33 arranged in the outer tubular body 2 and capable of inscribing in the outer tubular body 2. The outer tubular body 2 is constituted of tubularly forming a lamination sheet 4 composed of a heat conductive layer 7 and an insulating resin layer 8. Each of the inner tubularly bodies 31 to 33 is constituted of tubularly forming a lamination sheet 10 composed of a heat conductive layer 14 and an insulating resin layer 15. The outer tubular body 2 and the inner tubular bodies 31 to 33 have elasticity in the diameter direction. The heat radiating tubular body 1 held between a heater 21 and a casing 22 has two heat conductive routes P1, P2 composed of the outer tubular body 2 and six heat conductive routes Q1, Q2 composed of three inner tubular bodies 31 to 33 as connecting heat conductive routes. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a wood screw having improved holding force by increasing a wood catching rate and extracting strength as functions required for the wood screw to mount a sink cabinet or a washing and dressing board on a wall face, and having greatly reduced manufacturing cost while surely preventing the flotation of the cabinet when fixed to the wall and preventing the jump-up of a screw head. SOLUTION: The wood screw comprises the large dish shaped screw head having a diameter at least twice the diameter of a screw shaft, a plurality of ribs protruded on a truncated cone shaped slope formed between the screw head and the screw shaft, a knife shaped knurling portion having a diameter somewhat larger than the diameter of the screw shaft, a screw thread formed between the front end of the screw shaft and the knurling portion, and a front split sharp tip formed at the front end of the screw thread. COPYRIGHT: (C)2007,JPO&INPIT