Abstract: A method of manufacturing a power transmission chain pin, which connects links arranged in a chain width direction of a power transmission chain, includes a rough sectional shape formation step of drawing a wire rod so that a section thereof is formed in a substantially oval shape and a rough end portion shape formation step of cutting a continuous bar-like member which has been subjected to the drawing work into a predetermined length so that an end surface thereof has a predetermined angle with respect to an axial direction. A final sectional shape and a final end portion shape of the power transmission chain pin are formed by a cold forging work to the bar-like member cut into the predetermined length, which is a final shape formation step.

Abstract: An assembling method for a torque transmission chain, including a step of manufacturing split pieces of the chain in such a manner that a predetermined number of pins are held by a linear pin holding jig and then a predetermined number of links are press-fitted to the pins; a step of linearly arranging the split pieces so as to overlap split piece coupling links each arranged at any one of both ends of each of the split pieces; a step of inserting the pin through the overlapped split piece coupling links; and a step of pulling both ends of a whole of the plurality of split pieces coupled to each other via the split piece coupling links to thereby fix the pin to a pin fixing portion of the split piece coupling links.

Abstract: A power transmission chain includes a plurality of links respectively having front and rear insertion parts into which pins are inserted, a plurality of first pins and a plurality of second pins which are arranged in front and back for connecting the links. A plurality of the links includes two types of the links having different pitch lengths, wherein provided that a radius of a pulley shaft is RA, a radius of curvature of a face of the link having a shorter pitch length at an inner diameter side of the chain is RS, and a radius of curvature of a face of the link having a longer pitch length at an inner diameter side of the chain is RL, relation is set to be RA?RS?1.5RA, and RS<RL.

Abstract: A power transmission device includes a tubular stabilizer which is arranged between a primary pulley and a secondary pulley, and through which a string portion of a power transmitting chain is passed so as to be movable relative to the stabilizer whereby movement of the power transmitting chain is restricted. The stabilizer is supported by the power transmitting chain and is moved in the traveling direction of the power transmitting chain as the power transmitting chain moves in the traveling direction, and a movement of the stabilizer of which the amount is larger than or equal to a predetermined amount is restricted by a restricting device.

Abstract: A plate cylinder includes a base body with a cylindrical shape which is rotated in a predetermined direction and a pattern plate which is provided on an outer circumference surface of the base body and is rotated integrally with the base body and where a plurality of concave sections, which configures a predetermined printing pattern and is filled with conductive ink, is formed, where a blade, which wipes away the conductive ink which protrudes from the concave sections, contacts the outer circumference surface of the pattern plate, a blanket roll, to which the conductive ink is transferred and which performs printing by transferring the transferred conductive ink to a printing medium, contacts the outer circumference surface of the pattern plate, and a wall, which regulates infiltration of the blade and the blanket roll into the concave sections, is provided in the concave sections.

Abstract: An assembling method for a torque transmission chain, including a step of manufacturing split pieces of the chain in such a manner that a predetermined number of pins are held by a linear pin holding jig and then a predetermined number of links are press-fitted to the pins; a step of linearly arranging the split pieces so as to overlap split piece coupling links each arranged at any one of both ends of each of the split pieces; a step of inserting the pin through the overlapped split piece coupling links; and a step of pulling both ends of a whole of the plurality of split pieces coupled to each other via the split piece coupling links to thereby fix the pin to a pin fixing portion of the split piece coupling links.

Abstract: A method of manufacturing a power transmission chain pin, which connects links arranged in a chain width direction of a power transmission chain, includes a rough sectional shape formation step of drawing a wire rod so that a section thereof is formed in a substantially oval shape and a rough end portion shape formation step of cutting a continuous bar-like member which has been subjected to the drawing work into a predetermined length so that an end surface thereof has a predetermined angle with respect to an axial direction. A final sectional shape and a final end portion shape of the power transmission chain pin are formed by a cold forging work to the bar-like member cut into the predetermined length, which is a final shape formation step.

Abstract: A power transmission device includes a tubular stabilizer which is arranged between a primary pulley and a secondary pulley, and through which a string portion of a power transmitting chain is passed so as to be movable relative to the stabilizer whereby movement of the power transmitting chain is restricted. The stabilizer is supported by the power transmitting chain and is moved in the traveling direction of the power transmitting chain as the power transmitting chain moves in the traveling direction, and a movement of the stabilizer of which the amount is larger than or equal to a predetermined amount is restricted by a restricting device.

Abstract: Two kinds of pins having rolling contact surfaces of different shapes are used as first pins. A recess is formed at that portion of the first pin disposed between a chain outer periphery-side edge portion thereof and the rolling contact surface thereof. A straight portion is formed at that portion of the second pin disposed between a chain outer periphery-side edge portion thereof and the rolling contact surface thereof. With this construction, the two kinds of pins can be easily discriminated from each other from their appearance.

Abstract: An object of the invention is to provide a power transmission chain in which noises and vibrations are further reduced by modifying a shape of a rolling contact face and an offset amount of a pin which would affect a contact shape of an end face of the pin, and a power transmission device provided with the same. A pin 14 of which a rolling contact face 14a is formed as an involute curve includes two types having different radiuses Rb of the involute curve, and two types of offset amounts are set with respect to a shape of an end face of the pin to be contacted with a conical face of a pulley. Combination of larger and smaller radiuses Rb of the involute curve and larger and smaller offset amounts with respect to the pin 14 is limited to either of three combinations, namely, the larger Rb—the larger offset, the larger Rb—the smaller offset, and the smaller Rb—the smaller offset.

Abstract: A press-fitting apparatus includes a first retaining jig having a required number of pin insertion holes into which generally longitudinally half portions of pins and interpieces can be inserted, a second retaining jig having a required number of pin insertion holes into which one end portions of the pins and interpieces can be inserted, and pressing jigs each for pressing the link into a predetermined position relative to the pins and interpieces. In the press-fitting of the links, the press-fitting operation is divided into two steps, and in each of the two steps, the links are stacked from central portions of the pins and interpieces.

Abstract: Taper portions diameters of which are increased in outer directions in longitudinal directions of a pin and an interpiece are formed at inner peripheral faces of a pin fixing portion and an interpiece fixing portion of links at least on outermost sides in the links arranged in a width direction of a chain such that deformations of the pin and the interpiece in being operated with a load become bending deformations in a direction in which the link is not drawn from the pin and the interpiece.

Abstract: A manufacture method of a power transmission chain pin includes a work step of working a bar-like member of a predetermined length into a pin having a final sectional shape and a final end portion shape with a guide portion to facilitate a press-fitting operation by a cold forging work. At this time, the manufacture method does not include a grinding step of grinding an end portion of the bar-like member of the predetermined length by a grinding stone.

Abstract: A press-fitting apparatus includes a first retaining jig having a required number of pin insertion holes into which generally longitudinally half portions of pins and interpieces can be inserted, a second retaining jig having a required number of pin insertion holes into which one end portions of the pins and interpieces can be inserted, and pressing jigs each for pressing the link into a predetermined position relative to the pins and interpieces. In the press-fitting of the links, the press-fitting operation is divided into two steps, and in each of the two steps, the links are stacked from central portions of the pins and interpieces.

Abstract: A one-way clutch spring intended to reduce drag torque of one-way clutches. Tongues extend within pockets in which engagement members are disposed are bent in advance radially inward when they are disposed in an annular space so as to have bends at a proximal end and to form an angle of inclination (?) of 20°-30° with a base. Further, the angle of inclination (?) with the base increases to exceed the angle of inclination (?) by an amount of 5°-15° when engagement members contact the tongues. Further, the height of the front end of the tongue relative to the base is greater than that of a top of the second bend to the base, and the three bends each have their center of curvature positioned on the side of an inner ring with the base used as a reference and their radius of curvature is 0.2 mm-0.6 mm.

Abstract: Two kinds of pins having rolling contact surfaces of different shapes are used as first pins. A recess is formed at that portion of the first pin disposed between a chain outer periphery-side edge portion thereof and the rolling contact surface thereof. A straight portion is formed at that portion of the second pin disposed between a chain outer periphery-side edge portion thereof and the rolling contact surface thereof. With this construction, the two kinds of pins can be easily discriminated from each other from their appearance.

Abstract: A pin and an opening in which the pin is fixed have in their cross section straight-line portions and circular arc portions which connect to upper and lower ends of the straight-line portion, respectively. The length LD of the straight-line portion of the pin and the length LL of the straight-line portion of the opening satisfy LL?LD, and the radius RD of the circular arc portions which connect to the upper and lower ends of the pin, and the radius RL of the circular arc portions which connect to the upper and lower ends of the opening satisfy RL<RD.

Abstract: A power transmission chain includes a plurality of links, a plurality of pins, and a plurality of interpieces. Each of the plurality of links is formed of a link with a column of which stretch is suppressed by having front and back insertion parts made to be respectively independent through holes, and a link without a column which is relatively stretched easily by connecting front and back insertion parts into one through hole. The links with columns and the links without columns are mixed based on a certain mixture pattern.

Abstract: A detection apparatus, a detection method and an electron beam irradiation apparatus for detecting deflection electrons in order to precisely focus even if a vacuum seal valve is provided. An electron beam irradiation apparatus including a vacuum seal valve mechanism which is provided in a static pressure floating pad, and opens/closes an electron beam passage with a piston so as to switch between an electron beam irradiation state and a vacuum seal state, and a deflection electron detector which is provided between the vacuum seal valve mechanism and a master disk and detects a deflection electron signal generated from the master disk with electron beam irradiation.

Abstract: A one-way clutch spring (6) intended to reduce drag torque while retaining the engagement characteristics of one-way clutches. Teeth (6c) extended within pockets (6p) in which engagement members are disposed are bent in advance toward the side which becomes the inner side when they are disposed in an annular space (4) so as to have bends (6d, 6e, 6f) at the proximal end on the column (6b) side and to form an angle of inclination (?) of 20°-30° with the base (6a). Further, the teeth have a range of spring constant such that when they are disposed in the annular space to urge the engagement members, the angle of inclination (?) with the base increases to exceed the angle of inclination (?) by an amount of 5° -15°.