JP2002370880A - Emergency stop device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an emergency stop device for elevator capable of reducing its dimension in the vertical direction. SOLUTION: This emergency stop device for elevator comprises a pair of dampers 2A, 2B provided in a body 1, a pair of guides 3A, 3B arranged on a gradient surface R of the dampers 2A, 2B so as to face each other and provided so that one side thereof may be fixed and the other side thereof may move in the right/left direction, a roller 8 which is interposed between guides 3A, 3B and the dampers 2A, 2B, and an elastic bodies arranged between the guide 3A and the body 1. In this emergence stop device for elevator, the elastic bodies are structured to bend by the upward movement of the dampers 2A, 2B and the movement of the guide 3A, frictional force is developed between the dampers 2A, 2B and a guide rail 10 by spring force corresponding to the bending amount, and the elastic bodies are made into an elastic body 4 arranged in a single row.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency stop device for an elevator for stopping an elevator car or a counterweight or slowing down the speed of their movement.

[0002]

2. Description of the Related Art Generally, as an emergency stop device of an elevator for stopping an elevator car or a counterweight or slowing down a moving speed of the elevator, a body and an upward movement against a guide rail provided in the body are known. A pair of brakes arranged so as to be arranged, and a pair of guides arranged so as to oppose the inclined surface on the side opposite to the guide rail of the brake, one of which is fixed and the other is provided to move left and right,
The guide is constituted by a roller interposed between the guide and the brake element, and a guide on the moving side and an elastic body disposed between the body. An elastic body is flexed so that a frictional force is generated between the brake element and the guide rail by a spring force corresponding to the flexing amount. Usually, two sets of laminated disc springs have been used as the elastic body.

An example of this is disclosed in Japanese Patent Application Laid-Open No. Sho 62-51584.

[0004]

In the above prior art, since two sets of laminated elastic members are provided, the dimension in the height direction cannot be reduced. There was a limit.

An object of the present invention is to provide an emergency stop device for an elevator capable of reducing a dimension in a height direction.

[0006]

According to the first aspect of the present invention, a body, a pair of brakes provided in the body so as to move upward against a guide rail, and a guide rail opposite to the brake. A pair of guides, one fixed and the other provided to move left and right, a roller interposed between the guide and the brake element, The brake comprises a guide and an elastic body disposed between the bodies, wherein the brake moves upward and the guide moves to bend the elastic body, and a spring force corresponding to the amount of deflection causes the brake to be bent. In the elevator emergency stop device which generates a frictional force between the elastic members and the guide rails, the elastic members are configured as elastic members arranged in a single row.

[0007] With this configuration, the dimension in the height direction can be reduced.

According to a fifth aspect of the present invention, when the brake element moves upward and reaches the upper end, the spring force of the elastic body is distributed substantially at the center of the brake element.

Accordingly, the size of the brake in the height direction is restricted, and the brake can be made smaller.

According to a sixth aspect of the present invention, a guide bar parallel to the guide pin is provided on the back surface of the moving guide, and the guide bar is fitted so as to be movable in a hole provided in the body, and Was configured to translate.

According to this configuration, it is possible to provide a highly reliable emergency stop device for an elevator that does not give a rotation of the guide or an uneven deflection to the elastic body.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an emergency stop device for an elevator according to the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of an emergency stop device for an elevator according to the present invention in a non-operating state, and FIG. 2 is a block diagram at the time of operation of FIG.

In FIGS. 1 and 2, reference numeral 1 denotes a body of an emergency stop device supported by a car frame (not shown).
0. The brake elements 2A and 2B are formed parallel to the surface of the guide rail 10 on the side facing the guide rail 10, and have a slope R whose upper part is inclined toward the guide rail 10 on the opposite side. A plurality of connected rollers 8 are in contact with each of the inclined surfaces R of the pair of brakes 2A and 2B, and are guided and held by guide plates 9 mounted on the guides 3A and 3B. The guides 3A and 3B are in contact with the roller 8 and
A and 2B have a slope surface T parallel to the slope surface R. Opposite sides of the roller contact surfaces of the guides 3A and 3B are vertical surfaces.

The brakes 2A, 2B are connected to the lifting rod 7 by bolts 71,
By pulling up, the guide 3A, 3B, the roller 8, and the guide plate 9 can move vertically.

A guide pin 11 is mounted on the guide 3A, and is configured to fit in a hole 1a provided in the body 1 and move left and right. Guide 3A and body 1
The disc spring washer 13 and the disc springs 4 arranged in a single row are guided by the guide pins 11, and are held by the pull nut 12. By tightening the pull nut 12, an initial pressure can be applied to the disc spring 4. A plurality of thin plate-shaped (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 in combination. By doing so, the amount of deflection of the disc spring 4 during the operation of the emergency stop can be adjusted.

A guide bar 14 is mounted on the guide 3A, is fitted into a hole 1b provided in the body 1 without any gap, and is fitted so as to move left and right.

The guide 3B is fixedly installed on the body 1 via bolts 15 and 16.

The operation of the safety 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
While being guided by the guides 3A and 3B and the guide plate 9, it rises upward. The clearance between the brakes 2A, 2B and the guide surfaces 10a, 10b of the guide rails gradually narrows with the rise, and finally reaches a contact with each other. When the disc spring 4 is further raised, the disc spring 4 is compressed via the roller 8 and the guide 3A, so that the disc spring 4 generates a spring force corresponding to the amount of deflection, and the brakes 2A, 2B are guided by the guide surface 10a. , 10b. The brakes 2A, 2B have upper end surfaces 2a, 2b and an upper end surface 1A of an emergency stop body.
Rise until it abuts. Therefore, the brakes 2A, 2B
A frictional force is generated between the and the guide surfaces 10a and 10b by a spring force corresponding to the amount of deflection of the disc spring 4, and the car is stopped by the frictional force.

In the safety device constructed as described above, the guide bar 14 is connected to the guide 3A,
Since the guide bar 14 is fitted into the hole 1b of the body 1 without any gap, the guide 3A can move freely in the left-right direction, and the guide bar 14 moves in the up-down and front-rear directions.
It is restrained by the hole 1b of the body 1 and cannot be moved.
Therefore, the guide 3 for assembling the emergency stop device or braking the emergency stop device.
The rotation of A and the unbalanced deflection of the disc spring 4 can be restricted. That is, the disc springs 4 that are arranged and stacked in a single row can be formed as one set, and the safety device can be reduced in size and the safety device having highly reliable braking characteristics can be obtained.

Further, when the brake element 2A moves upward and reaches the upper end, the spring force of the disc spring 4 which is the elastic body is arranged so as to be distributed almost at the center of the brake element 2A. In addition, the size of the brake element 2A in the height direction is restricted, and the brake element 2A can be made smaller.

In this embodiment, the rotation is restricted by the guide pin 11. However, the rotation of the guide 3A is restricted by providing a key groove in the guide 3A and the lower end surface 1A of the upper portion of the body 1 and combining them. You may.

Although an example in which the disc springs arranged in a single row are used as the elastic body has been described, a coil spring can be used instead of the disc spring.

FIG. 3 is a diagram showing a non-operating state of another embodiment of the elevator safety device according to the present invention. In FIG. 3, the same reference numerals as those in FIG. 1 denote the same parts. In this embodiment, the bellows spring 40 is provided in place of the disc spring, and in the case of this bellows spring 40, a sufficient spring force can be expected.

[0025]

According to the present invention, the size of the safety device can be reduced by arranging the springs of the safety device in a single row.

Further, by providing the means for restricting rotation, it is possible to provide a highly reliable emergency stop device for an elevator which 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 showing an embodiment of an emergency stop device for an elevator according to the present invention in a non-operation state.

FIG. 2 is a configuration diagram during the operation of FIG. 1;

FIG. 3 is a configuration diagram of another embodiment of an elevator safety device according to the present invention in a non-operating state.

[Description of Signs] 1 Body 2A, 2B Brakes 3A, 3B Guide 4 Disc spring 7 Pull-up rod 8 Roller 10 Guide rail 14 Guide bar 40 Bellows spring

Continued on the front page (72) Inventor Mitsuru Omori 1070 Ma, Hitachinaka City, Ibaraki Prefecture Within the Building Systems Group, Hitachi, Ltd. (72) Inventor Masayuki Shigeta 832 Horiguchi 832 Horiguchi, Hitachinaka City, Ibaraki Prefecture Mitsui Mito Engineering Co., Ltd. F-term (reference) 3F304 DA45

Claims (7)

[Claims] 1. A body, a pair of brakes provided in the body and arranged so as to move upward against a guide rail, and arranged against a sloped surface of the brake on a side opposite to the guide rail. A pair of guides, one fixed and the other provided to move left and right, a roller interposed between the guide and the brake element, and a guide disposed between the moving guide and the body. And the guide moves to deflect the elastic body, and a spring force corresponding to the amount of deflection generates a frictional force between the braker and the guide rail. An emergency stop device for an elevator, wherein the elastic body is an elastic body arranged in a single row. 2. A pair of brakes, and a pair of guides disposed opposite to the inclined surface of the brakes on the side opposite to the guide rail, one of which is fixed and the other is provided to move left and right. A roller interposed between the guide and the brake,
A spring corresponding to the amount of deflection, comprising a guide on the moving side and an elastic body disposed between the bodies, wherein the braker moves upward and the guide moves to deflect the elastic body. In an emergency stop device for an elevator in which a friction force is generated between the brake element and the guide rail by a force, a guide pin that fits into a hole provided in the body is provided on a rear surface of the guide on the moving side. An emergency stop device for an elevator, wherein a single row of elastic members is provided on a guide pin between the back surface of the guide and the body. 3. The emergency stop device for an elevator according to claim 1, wherein the elastic body is a plurality of disc springs. 4. An emergency stop device for an elevator according to claim 1, wherein said elastic body is a bellows spring. 5. The braking device according to claim 1, wherein when the brake element moves upward and reaches the upper end, the spring force of the elastic body is distributed substantially at the center of the brake element. 2. The safety device for an elevator according to claim 2. 6. The emergency stop device for an elevator according to claim 1, further comprising means for restricting rotation of the guide. 7. A guide bar parallel to the guide pin is provided on a back surface of the moving guide, and the guide bar is fitted so as to be able to move into a hole provided in the body, thereby restricting rotation of the guide. The emergency stop device for an elevator according to claim 6, wherein: