JPH02109000U

JPH02109000U -

Info

Publication number: JPH02109000U
Application number: JP1739189U
Authority: JP
Priority date: 1989-02-16
Filing date: 1989-02-16
Publication date: 1990-08-30
Anticipated expiration: 2004-02-16
Also published as: JPH0632957Y2

Description

[Brief explanation of the drawing]

第１図は説明図、第２図は説明図、第３図は他
の実施例の説明図、第４図は従来技術の説明図で
ある。２……本体、４，６……昇降アーム、８……昇
降体、１０……扇形歯車、１２……ギヤードモー
タ、１４……歯車、１６……旋回アーム、１８…
…コイルスプリング、２０……ねじればね要素、
２２……外殻、２４……内殻、２６……緩衝材、
２８，３０……リンク片、３２……本体、３４…
…昇降アーム、３６……枢支、３８……コイルス
プリング、４０……リンク片、４２……本体、４
４……枢支、４６……コイルばね、４８……コイ
ルスプリング、５０……昇降アーム。 FIG. 1 is an explanatory diagram, FIG. 2 is an explanatory diagram, FIG. 3 is an explanatory diagram of another embodiment, and FIG. 4 is an explanatory diagram of a prior art. 2...Main body, 4, 6...Elevating arm, 8...Elevating body, 10...Sector gear, 12...Geared motor, 14...Gear, 16...Swivel arm, 18...
...Coil spring, 20...Twisted spring element,
22... Outer shell, 24... Inner shell, 26... Cushioning material,
28, 30... link piece, 32... main body, 34...
... Lifting arm, 36 ... Pivot, 38 ... Coil spring, 40 ... Link piece, 42 ... Main body, 4
4... Pivot, 46... Coil spring, 48... Coil spring, 50... Lifting arm.

Claims

[Claims for Utility Model Registration] (1) One of the lifting arms is rotatably supported on the main body, the lifting arm is linked to a drive source provided in the main body, and the other lifting arm is connected to the main body. In a device in which a coil spring for balance is suspended, and a rotational force is applied to the lifting arm in an upward direction by the elasticity of the coil spring, one of the torsion spring elements has a cushioning material press-fitted into the inner and outer shells of the main body. 1. A balancing device for a lifting arm in a lifting machine, characterized in that one shell is fixed, and the coil spring is connected to a link piece fixed to the other shell. (2) One of the lifting arms is rotatably supported on the main body, the lifting arm is connected to a drive source provided on the main body, and a coil spring for balance is suspended between the other lifting arm and the main body. and in the device in which a rotational force is applied to the lifting arm in the upward direction by the elasticity of the coil spring, one shell of a torsion spring element having a cushioning material press-fitted into the inner and outer shells is fixed to the other side of the lifting arm. A balancing device for a lifting arm in a lifting machine, characterized in that the coil spring is connected to a link piece fixed to the other shell. (3) One of the lifting arms is rotatably supported on the main body, the lifting arm is linked to a drive source provided in the main body, and a coil spring for balance is suspended between the other lifting arm and the main body. In the device in which a rotational force is applied to the lifting arm in the upward direction by the elasticity of the coil spring, one shell of a torsion spring element having inner and outer shells press-fitted with cushioning material is fixed to the main body, and the other shell is fixed to the main body. A link piece is fixed to the shell, one shell of a torsion spring element having a cushioning material press-fitted into the inner and outer shells is fixed to the other side of the lifting arm, a link piece is fixed to the other shell, and the link piece and the above-mentioned A balancing device for a lifting arm in a lifting machine, characterized in that both ends of the coil spring are connected to a link piece. (4) One of the lifting arms is rotatably supported on the main body, the lifting arm is linked to a drive source provided on the main body, and a coil spring for balance is suspended between the other lifting arm and the main body. In the device in which a rotational force is applied to the lifting arm in the upward direction by the elasticity of the coil spring, a link piece is rotatably supported on the main body, and one end of the coil spring is attached to an eccentric part of the link piece. a spring attached to the main body is connected to the link piece, and the elasticity of the spring biases the link piece in a direction opposite to the direction of rotation due to the elasticity of the coil spring. Balancing device for the lifting arm of a lifting machine. (5) One of the lifting arms is rotatably supported on the main body, the lifting arm is linked to a drive source provided in the main body, and a coil spring for balance is suspended between the other lifting arm and the main body. In the device in which a rotational force is applied to the lifting arm in the upward direction by the elasticity of the coil spring, a link piece is rotatably supported on the other side of the lifting arm, and the coil is attached to an eccentric portion of the link piece. One end of the spring is connected, a spring attached to the other side of the lifting arm is connected to the link piece, and the elasticity of the spring urges the link piece in a direction opposite to the direction of rotation due to the elasticity of the coil spring. A balancing device for a lifting arm in a lifting machine, characterized by: (6) One of the lifting arms is rotatably supported on the main body, the lifting arm is linked to a drive source provided in the main body, and a coil spring for balance is suspended between the other lifting arm and the main body. In the device in which a rotational force is applied to the lifting arm in the upward direction by the elasticity of the coil spring, a link piece is rotatably supported on the other of the main body and the lifting arm, and both link pieces are Both ends of the coil spring are connected to the eccentric portion, a spring attached to the main body is connected to the link piece on the main body side, a spring attached to the other side of the lifting arm is connected to the link piece on the other side of the lifting arm, and the spring attached to the other side of the lifting arm is connected to the link piece on the other side of the lifting arm. A balancing device for a lifting arm in a lifting machine, characterized in that the elasticity of a spring urges the link piece in a direction opposite to the direction of rotation due to the elasticity of the coil spring.