Abstract: To provide a simple-structured overload protection device. The overload protection device allows torque transmission between an inner rotating member and an outer rotating member that are coaxial and rotatable relative to each other, and is able to interrupt the transmission of torque exceeding a permissible level. The overload protection device includes an inner ring having an inner transmission surface in contact with an outer circumferential surface of the inner rotating member, and a first taper surface, and an outer ring having an outer transmission surface in contact with an inner circumferential surface of the outer rotating member, and a second taper surface that makes contact with the first taper surface of the inner ring. The overload protection device is configured to be able to press the inner ring and the outer ring to come closer to each other in an axial direction.

Abstract: Provided is a cam clutch unit for which the rotational resistance of rollers can be reduced, the rollers can be arranged at optimum locations, and the weight can be reduced. The cam clutch unit includes: a plurality of cams and a plurality of rollers aligned in a circumferential direction between an inner ring and an outer ring; a cage ring that includes a plurality of pocket portions that restrict relative movement of the cams and the rollers in the circumferential direction; and an annular spring that biases the cams, the cams each include an engagement portion that is engageable with the spring, the pocket portions that accommodate the rollers are provided at positions not interfering with the spring in an axial direction, and are arranged in a circumferential direction in a different manner on two sides relative to the spring.

Abstract: Provided is a cam clutch that prevents occurrence of cam jamming. The cam clutch includes a first contact surface member (130) and a second contact surface member (140) that have cam contact surfaces respectively which come into contact with a first cam (170a) and a second cam (170b) that are engaged with an outer race (110) and an inner race (160) in mutually different directions. The first contact surface member (130) and the second contact surface member (140) are provided at different positions in a rotation axis direction and configured to be independently movable in a circumferential direction relative to an outer race main body (120). The outer race main body (120) has a first movement restricting portion (122) and a second movement restricting portion (123) that restrict the movement of the first contact surface member (130) and the second contact surface member (140) in respective locking directions.

Abstract: An object of the present invention is to provide a low-temperature storage system that ensures minimal penetration of moisture into the low-temperature storage chamber from an external environment without involving an increase in size or complexity of the system configuration. The object is achieved by the configuration in this low-temperature storage system wherein a loading/unloading mechanism that carries storage objects into and out of the low-temperature storage chamber has an ancillary entry/exit preparation chamber. The entry/exit preparation chamber has a first anteroom with an interior space controlled to maintain a lower dew point than that of the external environment, and a second anteroom disposed between the first anteroom and the low-temperature storage chamber and having an interior space controlled to maintain a dew point that is between the dew point in the first anteroom and the dew point in the low-temperature storage chamber.

Abstract: An object of the present invention is to provide a cam clutch unit that can improve efficiency of torque transmission by improving ease of assembly and processability, while preventing a cam from falling out of a cage ring and preventing damage to a biasing member during assembly. The object is achieved by a cam by being configured to have a head portion and a leg portion that are configured to have respective maximum cross-sectional widths Wa and Wb larger than an opening width Wp of a pocket portion of a cage ring such that at least one of the head portion and the leg portion of the cam is allowed to pass through the pocket portion by rotating the cam while inserting the cam, which is in an inclined attitude, into the pocket portion along an opening direction thereof and thereby elastically deforming the pocket portion.

Abstract: To provide an overload protecting device with a simple structure and a low machining cost, capable of increasing a transmission torque, improving accuracy of an allowable torque to be set, and capable of continuous use even after an overload state, once it returns to a normal torque. A torque transmission mechanism for torque transmission, cam sliding surfaces 111, 121 of an inner ring 120 and an outer ring 110have cylindrical shapes, the torque transmission mechanism has a plurality of cams 130 provided in a circumferential direction between the cam sliding surfaces 111, 121 and urging means 140 for urging the plurality of cams 130 in a rotating direction thereof, and the cam 130 has a plurality of minimum radius parts and a plurality of maximum radius parts disposed alternately and formed having a rotationally symmetric shape to a rotation center thereof.

Abstract: To provide a simple-structured selectable clutch that can be switched between operating modes, has high responsiveness, allows a desired torque capacity to be secured, causes less rattling and noise, and allows for switching with a small force even when transmitting a large torque. The clutch includes a first clutch mechanism configured to transmit rotation at any rotation angle via movable and/or rotatable locking members disposed between a first rotating element and a second rotating element, a second clutch mechanism configured to transmit rotation at a predetermined angle by engagement between a first engaging element and a second engaging element, and an operating mechanism for switching the actions of at least the first clutch mechanism and/or second clutch mechanism. The clutch is configured to allow switching between transmission and interruption of torque between relatively rotatable first and second shafts.

Abstract: Provided is a cam clutch that prevents occurrence of cam jamming. The cam clutch includes a first contact surface member (130) and a second contact surface member (140) that have cam contact surfaces respectively which come into contact with a first cam (170a) and a second cam (170b) that are engaged with an outer race (110) and an inner race (160) in mutually different directions. The first contact surface member (130) and the second contact surface member (140) are provided at different positions in a rotation axis direction and configured to be independently movable in a circumferential direction relative to an outer race main body (120). The outer race main body (120) has a first movement restricting portion (122) and a second movement restricting portion (123) that restrict the movement of the first contact surface member (130) and the second contact surface member (140) in respective locking directions.

Abstract: An object of the present invention is to provide a cam clutch that biases cams with a stable force and enables improvement in durability and operational stability. The biasing means for biasing the cams to contact the inner race and outer race is formed by a ribbon spring, with a base part shaped into a ring and having cam-receiving portions and cam-biasing portions. The ribbon spring has an end structure configured to allow both ends of the base part to push each other in a circumferential direction. The end structure is configured to include a contact portion that extends in a radial direction and makes surface-contact with any of the inner race, the outer race, and the cage ring that holds the cams.

Abstract: An object of the present invention is to provide a tensioner with a simple structure that effectively maintains the oil pressure inside an oil pressure chamber at a correct level, while also making the machining and assembling processes less demanding. The tensioner includes a relief mechanism, which includes an orifice member that has an oil passage designed to form an orifice structure. The orifice member has a flat circular end wall part and a circumferential wall part that extends rearwards from the peripheral edge of the end wall part. The circumferential wall part includes a bulged portion that extends rearwards and is curved radially outwards. The bulged portion is designed such that the diameter of the circumscribed circle of the orifice member is greater than the inside diameter of the plunger as viewed in plan from an axial direction before the orifice member is press-fit into the plunger.

Abstract: An object of the present invention is to provide a cam clutch that biases cams with a stable force and enables improvement in durability and operational stability. The biasing means for biasing the cams to contact the inner race and outer race is formed by a ribbon spring, with a base part shaped into a ring and having cam-receiving portions and cam-biasing portions. The ribbon spring has an end structure configured to allow both ends of the base part to push each other in a circumferential direction. The end structure is configured to include a contact portion that extends in a radial direction and makes surface-contact with any of the inner race, the outer race, and the cage ring that holds the cams.

Abstract: A cam clutch unit which can receive an axial load in a small space without increasing rigidity of a cage ring or disposing another member is provided. The cam clutch unit includes a plurality of cams 130 and a plurality of rollers 140 disposed so as to be aligned in a circumferential direction between an inner ring and an outer ring, a cage ring 150 having a plurality of pocket portions 151, 152 which regulate relative movement in a circumferential direction of the cam 130 and the roller 140, and an annular spring 160 which urges the cam 130, in which the roller 140 has a part protruding in an axial direction more than the cage ring 150 when being held by the cage ring 150.

Abstract: To provide a cam clutch that allows use of the outer race as a rotating member without requiring a complex structure, and that allows a size reduction in the axial direction. The cam clutch includes an operating mode switch mechanism (140) for switching between two or more of a free state that allows relative rotation in both directions, a one-way clutch mode that allows relative rotation in one of forward and reverse directions, and a locked state that prohibits relative rotation in both directions. The operating mode switch mechanism (140) includes a cam orientation changing part (141) axially movable independently of rotation of the inner race (110) and the outer race (120). A plurality of cams (131) include an engaging portion (136) protruding from a side face toward the cam orientation changing part (141).

Abstract: An object of the present invention is to provide a cam and a one-way cam clutch that realize a reduction in weight and production cost, provide more design freedom in setting the center of gravity of the cam, and achieve high responsiveness. The above object is achieved by a cam configured to make contact with an inner race and an outer race by a rotational moment applied in an engaged direction by an annular spring, in which a plurality of cam plates having an identical outer contour and arranged in parallel along a direction of the pivot axis are coupled together and united by a connecting pin extending in the direction of the pivot axis, and the annular spring is configured to be mountable between adjacent cam plates and/or on an outer side of the plurality of cam plates in the direction of the pivot axis.

Abstract: A selectable clutch that enables an improvement in the performance of maintaining orientations of cams, and allows simplification of the structure of biasing mechanism, as well as reduction of the thrust required for the switching of operating modes is provided. The selectable clutch includes a plurality of cams circumferentially held by a cage ring between an inner race and an outer race, and biased in an engaging direction by a biasing mechanism. The cams are each configured to have the center of gravity located such that each of the cams functions as an engaging type cam when oriented in engagement with the inner race and the outer race, and such that each of the cams functions as a disengaging type cam in a tilted freewheel orientation not to contact with the inner race or the outer race.

Abstract: To provide a simple-structured chain tensioner that reduces the burden of work required for assembling and maintenance, sufficiently damps the motion of the plunger, and helps reduce machining costs and size increases of the plunger and tensioner body. The chain tensioner includes a tensioner body with a plunger bore, a plunger, and a biasing member that biases the plunger. The plunger has raised portions with which a locking member engages. The plunger bore is provided with a locking member holding part on one side that is open. The locking member holding part is provided with an inclined surface at one end in the plunger entry direction, the inclined surface becoming progressively shallower in the plunger entry direction. The locking member can deform elastically in a cross section when engaging with the raised portion of the plunger.

Abstract: A guide device for a long object includes a belt-shaped unit. The belt-shaped unit includes a first tubular member and a second tubular member. The first tubular member accommodates an elongated support member. The second tubular member accommodates a long object having flexibility. The second tubular member is shorter than the first tubular member. At least at one end of the belt-shaped unit, the first tubular member and the second tubular member are integrated with one another into the belt shape in a state in which an end of the first tubular member extends farther than an end of the second tubular member in a lengthwise direction of the belt-shaped unit.

Abstract: Providing a cam clutch that has a torque limiter function adaptable to high torque with a simple structure, excellent accuracy, stability, and durability, and can be downsized and have an increased service life. The cam clutch includes: a plurality of cams disposed in a circumferential direction between at least one pair of an inner ring and an outer ring that are coaxial with each other and rotatable relative to each other; and biasing means for biasing the plurality of cams so as to come into contact with the inner ring and the outer ring. Each of the cams includes an inclination restricting portion that restricts inclination of the cam in an engaging direction by coming into contact with a locking portion that is provided in a portion of the cam clutch other than cam receiving surfaces of the inner ring and the outer ring.

Abstract: A cam clutch unit includes a plurality of cams and a plurality of rollers disposed so as to be aligned in a circumferential direction between an inner ring and an outer ring, a cage ring having a plurality of pocket portions which regulate relative movement in a circumferential direction of the cam and the roller, and an annular spring which urges the cam, in which the cam has an engagement stepped portion capable of engagement with the spring, the cage ring has an end-part circumferential annular portion continuing in the circumferential direction on an end surface in the axial direction, the pocket portion regulates movement of the roller to the outer ring side and the inner ring side and has a claw portion capable of insertion of the roller from the outer ring side or the inner ring side by elastic deformation.

Abstract: Provided is a cam clutch unit for which the rotational resistance of rollers can be reduced, the rollers can be arranged at optimum locations, and the weight can be reduced. The cam clutch unit includes: a plurality of cams and a plurality of rollers aligned in a circumferential direction between an inner ring and an outer ring; a cage ring that includes a plurality of pocket portions that restrict relative movement of the cams and the rollers in the circumferential direction; and an annular spring that biases the cams, the cams each include an engagement portion that is engageable with the spring, the pocket portions that accommodate the rollers are provided at positions not interfering with the spring in an axial direction, and are arranged in a circumferential direction in a different manner on two sides relative to the spring.