JP3611537B2 - Elevator emergency stop device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator emergency stop device for emergency stopping an elevator car and a counterweight, and slowing their moving speed.
[0002]
[Prior art]
Generally, as an emergency stop device for an elevator that makes an elevator car or counterweight stop emergencyly or slows down the moving speed, it is arranged to move upward against the body and the guide rail provided in this body. A pair of brakes, a pair of guides arranged so as to oppose the slope surface on the side opposite to the guide rail of the brakes, one fixed and the other moving left and right, and the guide and the brake A roller interposed between the elements, a guide on the moving side, and an elastic body disposed between the bodies, and the elastic body is bent by moving the brake element upward and moving the guide. However, a structure in which a frictional force is generated between the brake and the guide rail by a spring force corresponding to the deflection amount has been put into practical use. In general, two sets of laminated disc springs are used as the elastic body.
[0003]
An example of this is JP-A-62-51584.
[0004]
[Problems to be solved by the invention]
In the above prior art, since two sets of laminated elastic bodies are provided, the height dimension cannot be reduced, and thus there is a limit to the miniaturization of the emergency stop device.
[0005]
An object of the present invention is to provide an emergency stop device for an elevator that can reduce the height dimension.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, the body, the pair of brakes provided in the body and arranged to move upward against the guide rail, and the sloped surface on the side opposite to the guide rail of the brake are arranged. A pair of guides provided so that one is fixed and the other moves left and right, a roller interposed between the guide and the brake, and a guide between the moving side and the body. The elastic body is configured such that the elastic body is deflected when the brake element moves upward and the guide moves, and a frictional force is generated between the brake element and the guide rail by a spring force corresponding to the amount of deflection. In the emergency stop device for an elevator, the elastic body is an elastic body arranged in a single row , and the spring force of the elastic body is substantially braked when the brake element moves up to the upper end. Child center Are you to the configuration to take distributed.
[0007]
With this configuration, the dimension in the height direction can be reduced, and the size of the brake element in the height direction can be made smaller than that regulated .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an emergency stop device for an elevator according to the present invention will be described with reference to the drawings.
[0013]
FIG. 1 is a configuration diagram in an inoperative state showing an embodiment of an emergency stop device for an elevator according to the present invention, and FIG. 2 is a configuration diagram in operation of FIG.
[0014]
1 and 2, reference numeral 1 denotes a body of an emergency stop device supported by a car frame (not shown), and a pair of brake elements 2 </ b> A and 2 </ b> B are disposed in the body 1 so as to face the guide rail 10. ing. The brake elements 2A, 2B are formed so that the side facing the guide rail 10 is parallel to the surface of the guide rail 10, and the opposite side has an inclined surface R whose upper part is inclined toward the guide rail 10 side. A plurality of coupled rollers 8 are in contact with each of the slope surfaces R of the pair of brake elements 2A, 2B, and these are guided and held by a guide plate 9 attached to the guides 3A, 3B. The guides 3A and 3B are in contact with the roller 8 and have a gradient surface T parallel to the gradient surface R of the brake members 2A and 2B. Opposite sides of the roller contact surfaces of the guides 3A and 3B are vertical surfaces.
[0015]
Further, the brake elements 2A and 2B are connected to the lifting rod 7 by bolts 71. By lifting the lifting rod 7, the brake members 2A and 2B are guided by the guides 3A and 3B, the roller 8 and the guide plate 9 and can move in the vertical direction. ing.
[0016]
A guide pin 11 is attached to the guide 3A, and is configured to fit in a hole 1a provided in the body 1 and move left and right. A disc spring washer 13 and a disc spring 4 arranged in a single row are guided by the guide pin 11 between the guide 3A and the body 1, and are held by the pull nut 12. It is possible to apply an initial pressure to the disc spring 4 by tightening the pull nut 12. A plurality of thin plate-like (for example, 0.1 mm to 1.0 mm) braking force adjusting spacers 5 are inserted between the disc spring 4 and the body 1, and the spacers 5 are inserted and removed. By doing so, the amount of deflection of the disc spring 4 during the emergency stop operation can be adjusted.
[0017]
A guide bar 14 is attached to the guide 3A. The guide bar 14 is fitted in a hole 1b provided in the body 1 without a gap, and is fitted so as to move left and right.
[0018]
The guide 3B is fixedly installed on the body 1 via bolts 15 and 16.
[0019]
The operation of the emergency stop device having the above configuration will be described. When the lowering speed of the car (not shown) exceeds a predetermined value, the pulling rod 7 is pulled up, and the brakes 2A, 2B connected to the lower part of the pulling rod 7 are rollers 8, guides 3A, 3B, Ascending upward while being guided by the guide plate 9. With the rise, the gap between the brake elements 2A, 2B and the guide rail guide surfaces 10a, 10b is gradually narrowed and finally comes into contact with each other. If it further rises, the disc spring 4 is compressed via the roller 8 and the guide 3A. Therefore, the disc spring 4 generates a spring force corresponding to the amount of deflection, and the brake elements 2A, 2B are guided by the guide surface 10a. 10b. The brake elements 2A and 2B are raised until they come into contact with the upper end surfaces 2a and 2b and the emergency stop body upper lower end surface 1A. Therefore, a frictional force due to a spring force corresponding to the deflection amount of the disc spring 4 is generated between the brake elements 2A, 2B and the guide surfaces 10a, 10b, and the car is stopped by this frictional force.
[0020]
In the emergency stop device configured as described above, the guide bar 14 is connected to the guide 3A, and the guide bar 14 is fitted in the hole 1b of the body 1 without a gap. The movement in the vertical and forward / backward directions is restricted by the guide bar 14 and the hole 1b of the body 1 and cannot move. Accordingly, the rotation of the guide 3A and the deflection of the disc spring 4 during assembling or braking of the safety device can be restricted. That is, the disc springs 4 arranged and laminated in a single row can be made into one set, and the emergency stop device can be reduced in size and can have a highly reliable braking characteristic.
[0021]
Further, since the spring force of the disc spring 4 which is the elastic body is distributed and applied to the central portion of the brake element 2A when the brake element 2A is moved up and positioned to the upper end, the brake element is applied. The size in the height direction of 2A is restricted, and the size can be made smaller.
[0022]
In this embodiment, the rotation is regulated by the guide pin 11, but the rotation of the guide 3A may be regulated by providing a key groove on the guide 3A and the body upper lower end surface 1A of the body 1 in combination. .
[0023]
Moreover, although the example which used the disk spring arrange | positioned in a single row as an elastic body was shown, it can change to a disk spring and can also use a coil spring.
[0024]
FIG. 3 is a block diagram of an inoperative state showing another embodiment of the elevator safety device of the present invention. The same reference numerals as those in FIG. 1 denote the same components. In this embodiment, a bellows spring 40 is provided in place of the disc spring. In the case of this bellows spring 40, a sufficient spring force can be expected.
[0025]
【The invention's effect】
According to the present invention, the safety device can be reduced in size by arranging the springs of the safety device in a single row.
[0026]
Further, by providing the means for restricting the rotation, it is possible to provide a highly reliable elevator emergency stop device that does not give a bias to the rotation of the guide or the elastic body.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an inoperative state showing an embodiment of an emergency stop device for an elevator according to the present invention.
FIG. 2 is a configuration diagram at the time of operation of FIG. 1;
FIG. 3 is a configuration diagram of an inoperative state showing another embodiment of the elevator safety device of the present invention.
[Explanation of symbols]
1 Body 2A, 2B Brake 3A, 3B Guide 4 Belleville Spring 7 Lifting Rod 8 Roller 10 Guide Rail 14 Guide Bar 40 Bellows Spring

Claims (3)

A body, a pair of brakes provided in the body and arranged to move up against the guide rail, and a sloped surface on the side opposite to the guide rail of the brake element are arranged, one of which is fixed The other includes a pair of guides provided to move left and right, a roller interposed between the guides and the brake element, and an elastic body disposed between the moving side guide and the body. And the elastic body is deflected when the brake element moves upward and the guide moves, and a frictional force is generated between the brake element and the guide rail by a spring force corresponding to the deflection amount. In the emergency stop device of
The elastic body is an elastic body arranged in a single row , and when the brake element moves upward and is positioned up to the upper end, the spring force of the elastic body is distributed and applied to the central part of the brake element. Elevator emergency stop device characterized by that. A pair of brakes, a pair of guides arranged so as to oppose the slope surface on the side opposite to the guide rail of the brakes, one fixed and the other moving left and right, the guides and the brakes It is composed of a roller interposed therebetween, a guide on the moving side, and an elastic body arranged between the bodies, and the elastic body is deflected by moving the brake and the guide moving. In an emergency stop device for an elevator, a frictional force is generated between the brake and the guide rail by a spring force corresponding to the amount of deflection.
A rear surface of the moving side guides, a guide pin that fits into a hole provided in said body provided, and Ru an elastic body disposed in a single row on the guide pins between the guides of the rear and the body In addition, the elevator emergency stop device according to the present invention, wherein the spring force of the elastic body is distributed and applied almost to the center of the brake when the brake is moved up to the upper end . A guide bar that is parallel to the guide pin is provided on the back of the moving guide, and the guide bar is fitted into a hole provided in the body so as to restrict rotation of the guide. The elevator emergency stop device according to claim 1 or 2.

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