Abstract: A belt or chain tensioner whereby a resonance due to chain or belt vibration is alleviated by means of hysteresis loss obtained by friction between adjacent elements of a reversely and closely wound multiple compression spring which urges a tension rod.

Abstract: A belt or chain tensioner provided with a detachable holder for locking an urging tension rod during storage and transport and a slipproof cap provided on the end of the tension rod for abutting against the holder.

Abstract: A belt or chain tensioner includes a collar mounted between a bearing and a spring seat. The spring seat includes a externally mounted on a cylinder portion of a rotational cylinder so as to prevent movement of the rotational cylinder in an axial direction and penetration of a torsion spring into a ring groove provided between the cylinder portion and a male threaded portion of the rotational cylinder.

Abstract: In a tensioner in which a tension rod advances from the casing to apply a tension to a chain or timing belt, the advancement of the rod is locked by inserting a pin into a penetrated hole formed at the drawing out portion of the rod. The penetrated hole is sealed to prevent the loss of lubricating oil when the pin is removed.

Abstract: In a tensioner, a friction brake locks the advancement of a tension rod by a friction force provided and a tension rod advances from a casing by the pressurizing of the compression spring to maintain a belt, chain or the like in a suitable tension state. A coil portion is outwardly inserted through the tension rod in a closely contacted state and one end of the coil portion is latched to the casing, while another end forms a friction brake which is an operation end to cause an enlargement or the shrinkage of the diameter of the coil portion, by which the advancement and the removal of the tension rod is performed.

Abstract: In a tensioner in which a male screw member and a female screw member are mounted in a casing of the tensioner in a screwed state and the female screw member advances in an axial direction by the rotation of the male screw member with the spring force, a cap is attached at the top end of the female screw member and further an oil sump storaging a lubricant oil is formed in an axial direction of the cap.

Abstract: The sealing of an inserting hole portion of a casing base portion side is performed by an elastic sealing member. In a tensioner in which a rotation body and urged body are provided within the casing in a screwed state and the urged body advances in an axial direction by the rotation of the rotation body by a spring force, the elastic sealing member includes a body portion closely adhered to an inner circumferential surface of an inserting hole formed in the casing and a guide portion closely adhered to the inner and the outer surfaces of the casing formed at opposite ends of the body portion and is inserted into the inserting hole, and further provided with a penetrated hole to insert a pushing jig thereinto.

Abstract: In a tensioner in which a tension rod advances from a casing to provide a tension to a chain or the like, the advancement of the tension rod is locked by inserting a pin into a hole formed in a portion where the rod is drawn out and further the drawn out portion of the tension rod is supported by a bearing portion formed at the bottom of the casing to stabilize the advancement of the rod.

Abstract: In a tensioner, in which a rotary body and an urged body are attached within a casing in a screwed portion and the urged body advances in an axial direction by the rotation of the rotary body with a spring force, a portion where an inner space of the casing and its outside interconnects is isolated with a selective transmission material which prevents oil penetration but allows air transmission.

Abstract: An advancement and the advancing state of a tension rod which maintains a belt or a chain in a tension state is maintained by a coil spring. The coil spring deflects against an excess of opposite force from the belt or the chain to go back the tension rod and prevents the excess tension of the belt or the chain.The coil spring having a non-linear characteristic attached within the casing so as to be a range of the use including a changing point of a load deflection characteristic changes the number of active turns of the coil spring at the time of the resonance of the belt or the chain with changing point as the boarder.The above resonance decreases according to the change of the natural frequency of the vibration of the coil spring.The advancement of the tension rod can also be performed by the coil spring formed by the stranded wires.

Abstract: A tensioner is provided with a female screw member for the tension adjustment of a belt or a chain screwed with a male screw provided a rotation force by a spring and a bearing in which the female screw member is inserted and constrains the rotation of the female screw member.In this tensioner, an outer form of the female screw member is formed so as to correspond to a bearing hole of the bearing. By this, an approximately whole length of the female screw member is able to slide through the bearing hole, and the stroke length of the female member can be secured sufficiently even if the size of the device in a tension controlling direction is shortened.

Abstract: A tensioner device is provided with a rotary body energized the rotation by a spring and an urged body restricted the rotation by a bearing are inserted into a casing in a screwed state.The inner part of the casing is tightly closed by being covered with a bellows between the above casing and the urged body, and the torque of the rotary body is converted into a propelling force in a rod direction.In this case, an excess in pressurized air which compensates the change of an inner pressure caused by propelling of the urged body, is sealed within the casing.

Abstract: A clamp includes a metal band body. The band body has separated both ends. The ring-shaped band body includes an outer lap portion, an inner lap portion, and an intermediate portion located between the inner and outer lap portions. A retaining hole is formed in the outer lap portion, and a hook is formed on the inner lap portion. The hook includes a sliding surface for allowing sliding of the outer lap portion when the outer and inner lap portions are relatively moved in a direction for reducing the diameter of the band body, and a hook edge hooked by an edge of the retaining hole against a force for increasing the diameter of the band body. A first projection is formed at the end of the outer lap portion to hook the distal end of a first arm of a crimping tool. A second projection is formed on the intermediate portion of the band body to hook the distal end of the second arm of the crimping tool.

Abstract: A tensioner is provided with a female screw member for the tension adjustment of a belt or a chain screwed with a male screw provided a rotation force by a spring and a bearing in which the female screw member is inserted and constrains the rotation of the female screw member.In this tensioner, an outer form of the female screw member is formed so as to correspond to a bearing hole of the bearing. By this, an approximately whole length of the female screw member is able to slide through the bearing hole, and the stroke length of the female member can be secured sufficiently even if the size of the device in a tension controlling direction is shortened.

Abstract: A belt tensioner has a shaft having an external thread and rotatably mounted in a body, a torsion spring provided between the body and the shaft so as to urge the shaft in a rotational direction, and a cylindrical rod having an internal thread engaged with the external thread of the shaft. A lower end of the rod is projected from the body so as to be operatively connected to a tension pulley for a belt. The torsion spring and both the threads are arranged to project the rod by the rotation of the shaft urged by the torsion spring. The rod is secured to the body so as to be adjusted in angular disposition.

Abstract: A hose band is formed into a ring, in order to be wrapped around a hose. When the band is wrapped around the hose, its end portions are superposed, one overlying the other. Projections are formed on the underlying end portion, in order to be fitted into the holes made in the overlying end portion. A tightening lug is included in the overlying end portion of the band. The lug comprises a pair of outwardly protruding legs set apart in the lengthwise direction of the band, and a main section connecting the upper ends of the legs and plastically bent in such a way that the portion, which is the center as viewed in the widthwise direction, protrudes inwardly, and both end portions protrude outwardly.

Abstract: A hose band according to the present invention comprises an elongated metallic band body which, when in use, is wound around a hose so that both end portions thereof are joined to each other. The band body has spaced apart retaining holes formed in an outer lap portion and hooks formed on an inner lap portion and adapted to engage the holes. The hooks each have a slanting surface which protrudes obliquely toward the end side of the outer lap portion. The bulge outward so that their cross section is outwardly convex.

Abstract: In a tension providing device having a rotary shaft which rotates the spring force in an inserted casing, a pushing body which slide in an axial direction by the aid of the rotation of the rotary shaft, a seal bolt screwed with the base end portion of the casing, and a boot which covers between casing and pushing body, the mixing of dust and foreign matters from outside and the leakage of the lubricant coated or filled in the inner portion are prevented due to the covering of the boot and seal with bolt.

Abstract: In a television stand secured tiltably to a base stand and provided with a television fixedly put on it, the tilt of the movable member is stopped by the energized force to a movable device by the abutment to the cam surface formed at the movable member or the base stand.

Abstract: A tension providing device which enables to prevent the invasion of dust and water into a casing together with enabling the locking and the winding off of the torsion spring from the base side of the casing. This device is characterized by being provided with a rotatable shaft in the casing which only rotates by restraining the sliding in the axial direction of the casing, screwing the pushing body which slides by the rotation of the shaft with the shaft, supporting this screwed portion with bearing, and further screwing a seal bolt at the base portion of the casing.