JPWO2007108112A1 - Brake device for elevator hoisting machine - Google Patents

Abstract

A brake drum 1 formed on a rotary drive body that raises and lowers an elevator, a fixed iron core 2 that is disposed in the center of the brake drum 1 and has electromagnetic coils 2a and suction surfaces 2b on both sides, and suction on both sides of the fixed iron core 2 The movable iron core 4 is disposed facing the surface 2b, is urged in the direction of the brake drum 1 by the urging spring 3 and is attracted to the fixed iron core 2 by the electromagnetic force of the electromagnetic coil 2a, and the brake provided on the movable iron core 4 In an elevator hoisting machine brake device including a brake shoe 5 arranged facing the drum 1, provided on a suction surface 2b of a fixed iron core 2 and a movable iron core 4 facing the suction surface 2b, respectively. Engaging means 6 and 7 are provided that engage with each other and enable the movable iron core 4 to move in the direction of the rotation axis of the brake drum 1 while supporting the weight of the movable iron core 4 to the fixed iron core 2. Brake device for an elevator hoisting machine according to claim.

Description

  The present invention relates to a brake device for an elevator hoist.

  Conventionally, in an elevator hoist brake device using an electromagnetic magnet, an electromagnetic coil attached to a fixed iron core is energized when the brake is released, the movable iron core is sucked, and the brake shoe is separated from the brake drum. Further, when the brake is dropped, by stopping energization to the electromagnetic coil, the brake shoe interlocked with the movable iron core is pressed against the brake drum by the spring inside the fixed iron core, and the brake is applied (see, for example, Patent Document 1). Moreover, the armature which is a movable iron core is the structure currently supported by the guide rod by the spherical bearing (for example, refer patent document 2).

Japanese Unexamined Patent Publication No. 2005-178969 Japanese Unexamined Patent Publication No. 2004-189418 (FIG. 3)

  In a conventional elevator hoisting machine brake device, the movable iron core is elastically supported by a spring receiver press-fitted inside the fixed iron core. Therefore, when removing the movable iron core, the operator removes the elastic iron core from the elastic support portion. There is a problem in that it is necessary to support the weight of the movable iron core, and when the movable iron core is enlarged, the workability of removing and attaching the movable iron core is deteriorated.

  In addition, the elevator hoisting machine described in Patent Document 2 has a problem in that workability is poor because an operator performs the removal work while supporting the weight of the armature when removing the armature (movable iron core). It was.

  The present invention has been made to solve the above-described problems, and provides an elevator hoisting machine brake device that allows an operator to attach and detach a movable iron core without losing weight. It is.

  A brake device for an elevator hoisting machine according to the present invention includes a brake drum formed on a rotary driving body for raising and lowering an elevator, and a fixed iron core disposed at the center of the brake drum and provided with electromagnetic coils and suction surfaces on both sides. And a movable iron core disposed on both sides of the fixed iron core, energized in the brake drum direction by an urging spring, and attracted to the fixed iron core by the electromagnetic force of the electromagnetic coil, and provided on the movable iron core In an elevator hoisting machine brake device provided with a brake shoe arranged to face a brake drum, provided on a suction surface of a fixed iron core and a movable iron core facing the suction surface, respectively, and engaged with each other. Thus, the movable iron core is provided with engagement means that can move the movable iron core in the direction of the rotation axis of the brake drum while supporting the weight of the movable iron core on the fixed iron core.

  In the elevator hoisting brake device according to the present invention, the engaging means includes a concave portion provided in the fixed iron core and a convex portion provided in the movable iron core and fitted to the concave portion.

  In the elevator hoisting machine brake device according to the present invention, the engaging means includes a key groove provided to face the fixed iron core and the movable iron core, respectively, and a key fitted in the key groove. .

  In the elevator hoisting brake device according to the present invention, a jig hole for attaching and detaching the movable iron core is provided at a position where the magnetic iron core is not affected by the magnetic field.

  According to the present invention, it is possible to reduce the work load of the movable core attaching / detaching work.

1 is a front view showing a brake device for an elevator hoist according to Embodiment 1 of the present invention. FIG. 2 is a front view showing a brake device for an elevator hoist according to Embodiment 2 of the present invention. FIG. 3 is a front view showing a brake device for an elevator hoist according to Embodiment 3 of the present invention. .

Explanation of symbols

1 Brake drum,
2 fixed iron core,
2a electromagnetic coil,
2b suction surface,
2c spring hole,
3 biasing spring,
4 Movable iron core,
4a spring receiver,
5 Brake shoe 6 Recess,
7 Convex,
8 keyway,
9 magnetic field,
10 Hole for jig,

  In the embodiment of the present invention, a drum type brake device for an elevator hoisting machine will be described as an example.

  1 is a front view showing a brake device for an elevator hoist according to Embodiment 1 of the present invention. In the figure, 1 is a brake drum formed on a rotary drive body (not shown) for raising and lowering an elevator, 2 is a fixed iron core disposed at the center of the brake drum 1, and a pair of electromagnetic coils 2a and suction surfaces 2b are provided on both sides. Is provided. 2 c is a spring hole recessed in the suction surface 2 b of the fixed core 2, 3 is a biasing spring provided in the spring hole 2 c, and 4 is a pair of opposingly disposed suction surfaces 2 b on both sides of the fixed core 2. The movable iron core is always urged in the direction of the brake drum 1 by the urging spring 3, and is attracted to the fixed iron core 2 by the electromagnetic force of the pair of electromagnetic coils 2a when the brake is released. 4 a is provided in the pair of movable iron cores 4, and is a spring receiver press-fitted into the spring hole 2 c of the fixed iron core 2 to receive the urging spring 4, and 5 is provided in the pair of movable iron cores 4 so as to face the brake drum 1. A pair of brake shoes.

  Here, when the brake is released, the electromagnetic coil 2 a is energized, the pair of movable iron cores 4 are attracted to the fixed iron core 2, and the pair of brake shoes 5 are separated from the brake drum 1. When the brake is dropped, the pair of brake shoes 5 interlocked with the pair of movable cores 4 are pressed against the brake drum 1 by the biasing spring 3 inside the fixed core 2 by stopping energization of the electromagnetic coil 2a.

  The pair of movable iron cores 4 are elastically supported on the fixed iron core 2 by spring receivers 4a press-fitted into the spring holes 2c of the fixed iron core 2, and the spring receiver 4a and the spring 3 are removed during maintenance and the front side of the brake drum 1 in the rotational axis direction. It is possible to remove it by moving it to.

  Up to this point, the configuration is similar to the conventional one. In the following, the structure that characterizes the present invention will be described. Reference numeral 6 denotes a first engagement means including a concave portion provided on the suction surfaces 2 b on both sides of the fixed iron core 2, and 7 denotes a second engagement means including a convex portion provided on the pair of movable iron cores 4 and fitted into the concave portion 6. Thus, the weight of the pair of movable cores 2 is supported together with the elastic support of the spring receiver 4a. The concave portion 6 and the convex portion 7 are slidably engaged with each other in the direction of the rotation axis of the brake drum 1, so that the pair of movable iron cores 4 fix their own weights even when the spring receiver 4a is not elastically supported. The brake drum 1 can move in the direction of the rotation axis while being supported by the iron core 2.

  According to the elevator brake device configured as described above, the recesses 6 are provided on both sides of the fixed iron core 2, and the pair of movable iron cores 4 are provided with the protrusions 7 that fit the recesses 6. The movable iron core 4 is supported on both sides of the fixed iron core 2 without free-falling as in the prior art without the elastic support of the spring receiver 4a. As a result, in the work of attaching and detaching the pair of movable iron cores 4 and the brake shoe 5 necessary for maintenance of the brake device of the elevator, the operator does not suffer from the weight of the pair of movable iron cores 4 and the spring receivers 4a and 4 The spring 3 can be attached and detached, and the pair of movable iron cores 4 can be moved easily in the direction of the rotation axis of the brake drum 1 along the engagement of the concave portion 6 and the convex portion 7, and can be easily attached and detached simply by pulling it out. Thus, the workload is greatly reduced. Moreover, it can respond to the enlargement of the movable iron core 4 by this.

  FIG. 2 is a front view showing a brake device for an elevator hoist according to Embodiment 2 of the present invention. In the figure, the same reference numerals are used for the corresponding portions of the first embodiment, and the description thereof is omitted.

  In the first embodiment, the weights of the pair of movable cores 4 can be supported by the engaged concave portions 6 and the convex portions 7, but in the second embodiment, the fixed core 2 and the upper portions of the pair of movable cores 4. On the other hand, engaging means comprising two pairs of key grooves 8 provided opposite to each other are provided, and by inserting a key (not shown) into the key groove 8, the weight of the pair of movable iron cores 4 can be supported. It is a thing.

  FIG. 3 is a front view showing a brake device for an elevator hoist according to Embodiment 3 of the present invention. In the figure, the same reference numerals are used for the corresponding portions of the first embodiment, and the description thereof is omitted.

  In the figure, 9 is a magnetic field generated by a pair of electromagnetic coils 2 a provided on the fixed iron core 2 conceptually shown, and 10 is provided in front of the pair of movable iron cores 4 and is disposed at a position that does not affect the magnetic field 9. This is a hole for a jig. As a result, the pair of movable iron cores 4 can be easily gripped, and the lifting device can be used in the work of removing the pair of movable iron cores 4. In addition, the work load during maintenance can be reduced without sacrificing the suction force between the fixed iron core 2 and the pair of movable iron cores 4.

  As described above, the brake device for an elevator hoist according to the present invention can be used in a brake device in which the movable iron core needs to be detached during maintenance.

Claims (4)

A brake drum formed on a rotary drive that raises and lowers the elevator;
A fixed iron core disposed at the center of the brake drum and provided with electromagnetic coils and suction surfaces on both sides;
A movable iron core disposed opposite to the suction surfaces on both sides of the fixed iron core, biased in the direction of the brake drum by a biasing spring, and sucked to the fixed iron core by the electromagnetic force of the electromagnetic coil;
A brake device for an elevator hoisting machine, comprising: a brake shoe provided on the movable iron core and disposed facing the brake drum;
The fixed iron core is provided on the suction surface and the movable iron core facing the suction surface, and is engaged with each other so that the weight of the movable iron core is supported by the fixed iron core while the movable iron core is rotated by the brake drum. A brake device for an elevator hoisting machine, comprising engagement means that is movable in an axial direction.   The brake device for an elevator hoisting machine according to claim 1, wherein the engaging means includes a concave portion provided in the fixed iron core and a convex portion provided in the movable iron core and fitted to the concave portion.   The brake device for an elevator hoisting machine according to claim 1, wherein the engaging means includes a key groove provided opposite to the fixed iron core and the movable iron core, and a key fitted in the key groove. .   The elevator hoisting brake device according to any one of claims 1 to 3, wherein a jig hole for attaching and detaching the movable iron core is provided at a position where the movable iron core is not affected by a magnetic field. .

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