Abstract: There is provided a pinching tool capable of reliably pinching an object by a pair of pinching teeth each having a continuous mountain-valley shape and accurately performing a secondary operation on the object pinched between the pinching teeth. A first arm 1 and a second arm 2 each of which has a jaw 4 arranged on the front end and a grip 5 arranged on the rear end side are coupled in an X shape by coupling bosses 6 arranged on the arms 1, 2 adjacent to the jaws 4 and a coupling shaft 3. Lateral pinching teeth 11 are formed on front parts of opposed surfaces of the pair of jaws 4. Each of the lateral pinching teeth 11 includes a plurality of lateral rib teeth 17 which extend in a direction intersecting a tool central axis 8 and are continuous in a mountain-valley shape.

Abstract: Provided are scissors with excellent safety that can more reliably prevent finger pinch when being closed. In the present invention, finger pinch prevention guards 20a, 20b for preventing fingertips from entering the opposing inner surfaces 10a, 10b side from above or below are formed on left and right operation portions 7a, 7b. This can prevent user's fingertips from reaching the opposing inner surfaces (10a, 10b) by setting the user's fingertips inserted into finger placing holes (6a, 6b) along upper and lower surfaces of the finger pinch prevention guards 20a, 20b. Consequently, when the operation portions 7a, 7b are in the closed position, the fingertips are prevented from being pinched between the opposing inner surfaces 10a, 10b so as not to cause finger pinch.

Abstract: Provided are scissors with excellent safety that can more reliably prevent finger pinch when being closed. In the present invention, finger pinch prevention guards 20a, 20b for preventing fingertips from entering the opposing inner surfaces 10a, 10b side from above or below are formed on left and right operation portions 7a, 7b. This can prevent user's fingertips from reaching the opposing inner surfaces (10a, 10b) by setting the user's fingertips inserted into finger placing holes (6a, 6b) along upper and lower surfaces of the finger pinch prevention guards 20a, 20b. Consequently, when the operation portions 7a, 7b are in the closed position, the fingertips are prevented from being pinched between the opposing inner surfaces 10a, 10b so as not to cause finger pinch.

Abstract: The invention provides a pair of pliers capable of properly pinching a screw head and reliably removing a screw from an object to which the screw has been fastened even if the screw has small thickness of a peripheral face to be pinched between pinching teeth. The pair of pliers is formed by coupling a first arm 1 and a second arm 2 each having a jaw portion 4 and a grip 5 through a coupling shaft 3 in an X shape. Each of the jaw portions 4, 4 is provided on left and right sides of a front end thereof with flanks 16, 16 for preventing opposite corners of front ends of each of the jaw portions 4, 4 from coming in contact with a screw fastened face 22. Each of the jaw portions 4, 4 also comprises longitudinal pinching teeth 13, 13 capable of pinching the peripheral face of the screw head 21 so as to be recessed in opposed faces of the respective jaw portions 4, 4 between the left and right flanks 16, 16.

Abstract: The invention provides a pair of pliers capable of properly pinching a screw head and reliably removing a screw from an object to which the screw has been fastened even if the screw has small thickness of a peripheral face to be pinched between pinching teeth. The pair of pliers is formed by coupling a first arm 1 and a second arm 2 each having a jaw portion 4 and a grip 5 through a coupling shaft 3 in an X shape. Each of the jaw portions 4, 4 is provided on left and right sides of a front end thereof with flanks 16, 16 for preventing opposite corners of front ends of each of the jaw portions 4, 4 from coming in contact with a screw fastened face 22. Each of the jaw portions 4, 4 also comprises longitudinal pinching teeth 13, 13 capable of pinching the peripheral face of the screw head 21 so as to be recessed in opposed faces of the respective jaw portions 4, 4 between the left and right flanks 16, 16.

Abstract: Pliers for advantageously removing small screws are provided. The pliers have a pair of upper and lower arms which are pivotally supported by a shaft. Front end tips of the upper and lower arms are respectively provided with upper and lower recessed engagement parts between right and left edges, and the engagement parts vertically face each other. The upper and lower engagement parts are inclined in a manner such that they gradually become separated vertically from each other toward the rear when the jaws are closed. An inner bottom included in each of engagement parts is provided with plural projected and depressed streams extending in a back and forth direction.

Abstract: Pliers for advantageously removing small screws are provided. The pliers have a pair of upper and lower arms which are pivotally supported by a shaft. Front end tips of the upper and lower arms are respectively provided with upper and lower recessed engagement parts between right and left edges, and the engagement parts vertically face each other. The upper and lower engagement parts are inclined in a manner such that they gradually become separated vertically from each other toward the rear when the jaws are closed. An inner bottom included in each of engagement parts is provided with plural projected and depressed streams extending in a back and forth direction.

Abstract: A punching method and apparatus for forming through holes by punching in a ceramic green sheet for use as a material of a laminated substrate. Not only the positioning of the work but also the driving of the upper die set are conducted by of servomotors with the speed and timing of operation of the servomotors being controlled in accordance with a prestored program in a microcomputer, so as to attain a high speed and efficiency of operation. In addition, a hole clearing operation is conducted immediately after the punching so that the chip remaining in the punched through hole, if any, is forced out from the through hole by the same punch used in the punching operation.

Abstract: An apparatus for performing roll bending on shape metal including a first rolling roll, a second rolling roll having an outer circumferential surface juxtaposed against an outer circumferential surface of the first rolling roll, and third and fourth rolling rolls having outer circumferential surfaces opposed against end faces of the first and second rolling rolls respectively. Two to four rolls selected from the group of the four rolling rolls are used for performing roll bending on shape metal in such a manner that the shape metal has, after being subjected to the roll bending, a thickness which successively decreases in going toward its outer portion from its central portion.

Abstract: To increase production of magnetrons, a spiral fin is wound on a magnetron body as soon as it is produced, and a leading end and a trailing end of the fin are fixed to the magnetron body. This increases the number of turns of the fin wound on the magnetron body and improves the bond strength with which the fin is bonded to the magnetron body to thereby increase the effect achieved by the fin in dissipating heat and avoiding a decline in the performance characteristics of the magnetron.

Abstract: A method of and an apparatus for fabricating a spiral fin in which a strip of material is bent with rolling by a pair of rolls while being imparted with a tension to reduce the speed at which the strip is drawn between the pair of rolls to reduce a compressive force applied to a portion of the strip corresponding to an outer edge portion of the spiral fin, thereby improving the forming limit of the spiral fin.