JP2005154082A - Breaking device for elevator hoisting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a breaking device for an elevator hoisting machine with simple structure, reducing occurrence of failure. <P>SOLUTION: A brake electromagnet 1 is provided with a state detecting coil 15 along with a brake releasing coil 4 to detect an attraction or drop state of a movable iron core 5 of the electromagnet 1. The brake electromagnet 1 is also provided with state detecting wiring short-circuited in the attraction or drop state of the movable iron core 5 along with the brake releasing coil 4 to detect the attraction or drop state of the movable iron core 5 based on a current passing state in the wiring. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a brake device for an elevator hoisting machine, and particularly relates to detection of a brake state.

  Conventionally, a brake switch of an elevator hoist has used a contact switch to detect a braking / release state. However, the contact switch needs to be pushed in a certain distance, and a brake device with a small stroke needs to use a lever mechanism in order to obtain a necessary stroke, which complicates the structure. In addition, the switch was prone to failure such as causing contact failure.

  FIG. 4 is a front view showing the interior of a conventional elevator hoisting machine with a part thereof broken. FIG. 5 is a side view of FIG. 4 excluding the braked drum. The electromagnet 1 includes a fixed iron core 3, a coil 4, a movable iron core 5, a spring 6 that generates a braking force, and a lining 7 that are fixed with bolts 2. When the coil 4 is energized, the pressing force of the spring 6 is overcome and the movable iron core 5 is attracted to the fixed iron core 3, and the lining 7 fixed to the movable iron core 5 is pulled away from the braked drum 8 to brake the braked drum 8. Is released. When the current of the coil 4 is interrupted, the movable iron core 5 is pulled away from the fixed iron core 3 by the pressing force of the spring 6, and the lining 7 presses the braked drum 8 to brake the braked drum 8.

  In the brake device 1, a switch mechanism 9 is provided to detect the opened state. The switch mechanism 9 includes a pin 10 for transmitting a brake stroke, a lever 11 for expanding the stroke, a contact switch 12, and a switch cable 13. A brake device for an elevator hoisting machine of the same type is disclosed in Patent Document 1.

JP-A-7-323970

Conventional elevator hoisting machine brake devices have problems such as complication due to the provision of a switch mechanism, occurrence of switch failure, and enlargement of brake structure dimensions. FIG. 6 is a side view showing the interior of the conventional brake device partially broken. As shown in FIG. 6, when the brake contact switch 12 is arranged without popping out, the fixed iron core portion reduced is In order to achieve the required performance, the size must be increased.
The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a brake device for an elevator hoisting machine that has a simple structure and is less likely to cause failure.

A brake device for an elevator hoist according to the present invention is provided with a brake release coil and a state detection coil in a brake electromagnet, and detects whether the movable core of the electromagnet is attracted or dropped.
Also, the brake magnet is provided with a brake release coil and a state detection wiring that is short-circuited when the movable core is attracted or dropped, and detects whether the movable core is attracted or dropped depending on the energized state of the wiring. did

  According to the elevator hoisting machine brake device of the present invention, it is possible to obtain an elevator hoisting machine brake device with a simple structure and less occurrence of failure.

Embodiment 1 FIG.
FIG. 1 is a side view showing a part of a brake device for an elevator hoisting machine according to a first embodiment of the present invention. 4 to 6 indicate the same or corresponding parts. As in the prior art, when the coil 4 is energized, the movable iron core 5 is attracted to the fixed iron core 3 by overcoming the pressing force of the spring, and the lining 7 fixed to the movable iron core 5 is separated from the braked drum to be braked drum. Is released. When the current of the coil 4 is cut off, the movable iron core 5 is pulled away from the fixed iron core 3 by the pressing force of the spring, and the lining 7 presses the braked drum to brake the braked drum. In the first embodiment, the brake release coil 4 and the state detection coil 15 are provided on the fixed iron core 3 of the electromagnet 1. Reference numeral 16 denotes the wiring. When the movable iron core 5 is moved by suction and dropping, the state detection coil 15 generates a current change as shown in FIG. By differentiating the current value, it can be determined whether the movable iron core shifts to the attracted state or falls. Further, the arrangement in the electromagnet 1 is redundant, and the layout is improved as compared with the contact switch. Furthermore, since it can also be comprised with the molded coil 15, the possibility of failure is extremely low.

Embodiment 2. FIG.
FIG. 3 is a side view showing the interior of a brake device for an elevator hoisting machine according to a second embodiment of the present invention, partially broken away. In the fixed iron core 3, a positive terminal 18 and a negative terminal 19 of a power source are arranged on the surface facing the movable iron core 5, and both terminals are short-circuited by the movable iron core 5 when the movable iron core 5 is sucked. The suction of the movable iron core 5 can be detected by passing a current between them. Since the current between the terminals 18 and 19 is interrupted when the movable core 5 is dropped, the fall of the movable core 5 can be detected. Reference numeral 20 denotes a wiring of both terminals 18 and 19. The arrangement of the terminals 18 and 19 may be short-circuited when the movable core 5 is dropped.

  By applying the elevator hoisting machine brake device according to the present invention, it is suitable for obtaining a simple structure with few failures.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a part of a brake device of an elevator hoisting machine that is Embodiment 1 of the present invention, with a part thereof broken. FIG. 3 is a current characteristic diagram of the state detection coil of the first embodiment. It is a side view which partially fractures | ruptures the brake device of the elevator hoisting machine which is Embodiment 2, and shows an inside. It is a front view which fractures | ruptures a conventional brake device of the elevator hoisting machine, and shows an inside. FIG. 5 is a side view of the drum with the braked drum removed from FIG. 4. It is a side view which shows the inside by partially breaking a conventional brake device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnet 2 Bolt 3 Fixed iron core 4 Coil 5 Movable iron core 6 Spring 7 Lining 8 Brake drum 9 Switch mechanism 10 Pin 11 Lever 12 Contact switch 13 Switch cable 15 State detection coil 16 Wiring 18 + terminal 19-terminal 20 Wiring.

Claims (2)

  A brake device for an elevator hoisting machine, in which a state detection coil is provided together with a brake release coil in a brake electromagnet so as to detect whether the movable iron core of the electromagnet is attracted or dropped.   Elevator that is provided with a brake release coil and a state detection wiring that is short-circuited when the movable iron core is attracted or dropped in the brake electromagnet, and detects whether the movable iron core is attracted or dropped by the energized state of the wiring. Brake equipment for hoisting machines.

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