JPH0360893U

JPH0360893U -

Info

Publication number: JPH0360893U
Application number: JP11588089U
Authority: JP
Priority date: 1989-10-03
Filing date: 1989-10-03
Publication date: 1991-06-14

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す回路図、第
２図は従来の巻上機を示す回路図である。図において、１……交流電源、２……ブリツジ
回路、３，４……正転用のａ接点、５，６……逆
転用のａ接点、１２……モータ、１３……正転用
のスイツチ、１５……正転用の電磁コイル、１６
……逆転用のスイツチ、１８……逆転用の電磁コ
イル、１９……正転用のｂ接点、２０……抵抗、
２１……逆転用のｂ接点、２２……誤操作防止用
の電磁コイル、２３……誤操作防止用のｂ接点で
ある。なお、各図中、同一符号は同一、又は相当
部分を示す。 FIG. 1 is a circuit diagram showing an embodiment of this invention, and FIG. 2 is a circuit diagram showing a conventional hoisting machine. In the figure, 1... AC power supply, 2... Bridge circuit, 3, 4... A contact for forward rotation, 5, 6... A contact for reverse rotation, 12... Motor, 13... Switch for forward rotation, 15... Electromagnetic coil for normal rotation, 16
... Switch for reverse rotation, 18 ... Electromagnetic coil for reverse rotation, 19 ... B contact for forward rotation, 20 ... Resistor,
21... B contact for reverse rotation, 22... Electromagnetic coil for preventing erroneous operation, 23... B contact for preventing erroneous operation. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims

[Scope of utility model registration request]

A bridge circuit that rectifies AC power into DC, an operating circuit that can operate the motor in forward and reverse rotation, and stop the motor, and a circuit that is connected between the bridge circuit and the motor and is used to operate the operating circuit. a forward/reverse rotation/reverse operation/stop switching circuit that switches between forward/reverse operation and stop of the motor based on the motor;
A hoisting machine comprising: an erroneous operation prevention circuit that disconnects the operating circuit from the bridge circuit when the forward rotation and reverse rotation of the motor is stopped based on the operation for stopping the forward rotation and reverse rotation.