JPH1053382A - Electromagnetic brake for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with adjustment by interposing a spring between a support plate on which a brake shoe is mounted and an arm to provide the degree of freedom in the brake shoe support plate itself, and automatically obtain the working between the brake shoe and a rail. SOLUTION: An electromagnetic brake for a linear-driven elevator comprises a compression spring 6 for applying the brake, an electromagnet for releasing the brake, and an arm 4 to transmit the force, and the electromagnet 5 comprises a case 10, an electromagnetic coil, a core 9, and the compression spring 6. The arm 4 is mounted on a counterweight by a shaft 16 to work as a lever around the shaft 16, and a brake shoe 7 provided on a tip of the arm 4 is brought into contact with the arm 4 through a plate spring 18. A circular projection is provided around a support plate 13, and a conical hole is provided in the arm 4 so as to be mated therewith. The brake shoe 7 is movable in any direction around the projection as a supporting point, and the surface working with the rail 3 is automatically adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electromagnetic brake for a linear drive elevator or the like.

[0002]

2. Description of the Related Art A conventional electromagnetic brake for an elevator will be described with reference to FIGS.

An electromagnetic brake 1 for a linear drive elevator
Is installed on the side of the counterweight 2 and brakes the counterweight by sandwiching the guide rail 3 for the counterweight.

The electromagnetic brake 1 comprises two parallel arms 4 and 4 having an intermediate portion connected by a shaft so that one end of a pair of arms is opened when the other end is opened, and a brake release is provided at one inner thigh of the arms. And a pair of brake shoes 7 for applying a brake across the guide rail 3 are provided at the other end of the inner leg.

The brake electromagnet 5 includes an electromagnetic coil 8, an iron core 9, a case 10, and a compression spring 6 for closing the brake.
And so on. The iron core 9 is connected to the arms 4 and 4 by a joint 11 and a pin 12 on the iron core side.

The arms 4 and 4 are connected at their intermediate portions by a shaft 16 and fixed to the counterweight 2 so that the arm acts as a lever around the shaft 16 such that when one end is opened, the other end is closed. ing. The brake shoes 7 are fixed to the tips of the arms 4 and 4 via bolts via the support plates 13.

The brake shoe 7 is composed of a support plate 13 and a brake lining (friction material) 14 mounted thereon. What affects the braking force of the brake is the contact surface between the guide rail 3 and the brake lining 14.
For this reason, it is necessary to adjust the contact surface, and fine adjustment is performed by the screw 15 to obtain the parallelism between the rail 3 and the brake lining 14.

[0008]

A brake device for a linear drive elevator is a mechanism for directly sandwiching rails to apply a brake, so that a brake lining (brake shoe) is required.
In order to stabilize the braking force that changes depending on the contact condition between the rail and the rail, fine adjustment of the contact condition between the rail and the brake shoe is required, and this adjustment takes time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a brake device having good handling and workability by eliminating a screw adjusting mechanism for improving the contact between a rail which controls the braking force of the brake and the surface of the brake shoe.

[0010]

A spring is interposed between the support plate 13 on which the brake shoe is mounted and the arm 4, and the brake shoe support plate itself has a degree of freedom.
The contact between the brake shoe and the rail is obtained automatically, eliminating the need to adjust the contact.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on an embodiment.

FIG. 1 shows the configuration of the embodiment. The electromagnetic brake 1 for a linear drive elevator is a mechanism that is installed on the counterweight 2 side and brakes by sandwiching the guide rail 3.

The electromagnetic brake 1 comprises a compression spring 6 for operating the brake, an electromagnet 5 for releasing the brake, and arms 4 and 4 for transmitting a force.

The electromagnet includes a case 10, an electromagnetic coil 8, an iron core 9, and compression springs 6, 6,... For closing the brake. Arms 4 and 4 are iron core joint 11 and pin 1
2, the electromagnet core 9 is connected. Further, the arms 4, 4 are attached to the counterweight 2 by a shaft 16, and are mechanisms that move the lever around the shaft 16. A brake shoe 7 is provided at the tip of the arms 4, 4, and is brought into contact with the arm 4 via a leaf spring 18.

At the center of the support plate 13, a circular projection is provided, and a conical hole is provided in the arm 4 so as to fit into the circular protrusion, and the brake shoe 7 can be moved in all directions with this as a fulcrum. As a result, the contact with the rail 3 is automatically adjusted. A lining 14 is screwed to the support plate 13.

The electromagnetic brake 1 for a linear drive elevator is installed on a counter weight 2 and sandwiches the rail 3 to brake the car. To stabilize the contact surface between the lining 14 and the rail 3, a bolt is used. I was making adjustments, but it took a long time to make adjustments. Therefore, by providing the plate spring 18, the brake shoe 7 is provided with a degree of freedom, the contact surface is improved, and a reliable braking force can be obtained.

[0017]

According to the brake device of the present invention, the braking force can be stably and reliably transmitted. Also, fine adjustment on site is not required, and a brake with improved reliability and easy handling can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of an electromagnetic brake according to the present invention,

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is a plan view of a conventional electromagnetic brake,

FIG. 4 is a view taken along the line IV-IV in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electromagnetic brake 2 Counterweight 3 Counterweight guide rail 4 Arm 5 Electromagnet 6 Compression spring 7 Brake shoe 8 Electromagnetic coil 9 Iron core 10 Case 11 Joint 12 Pin 13 Brake shoe support plate 14 Brake lining 15 Adjustment screw 16 shaft 18 leaf spring

Claims (1)

[Claims] An intermediate portion between two arms is connected by a shaft so that the other end is closed when one end of the pair of arms is opened, and an operating compression spring and an opening electromagnet are provided on one of the arms. An electromagnetic brake for an elevator, comprising a pair of brake shoes that sandwich both sides of a guide rail at the tip of the inner arm of the other arm, wherein a spherical projection is provided at the center of a support plate of the brake shoe, An electromagnetic brake for an elevator, characterized in that the brake shoe is fitted in a recess of (1) and the left and right ends of the support plate are supported by springs.