CN105899452A - Elevator tie-down device and elevator device - Google Patents

Abstract

The invention provides an elevator tie-down device to prevent frictional engagement with a wedge due to rope shrinkage of an elevator device. A tie-down device is provided with: a housing (8c) that is supported so as to be vertically movable along a compensating rail (8a) and has an inclined surface (8b) that widens upwardly while facing the compensating rail (8a); a wedge (8d) that is disposed in a gap between the compensating rail (8a) and the inclined surface (8b) of the housing (8c) and can frictionally engage with the compensating rail (8a); a roller (8e) that rolls on the inclined surface (8b) of the housing (8c) and the wedge (8d) while being held by facing surfaces of the inclined surface (8b) of the housing (8c) and the wedge (8d); and supporting members (8f, 8g) that support the wedge (8d). The supporting members (8f, 8g) support the wedge (8d) at a vertical position such that the wedge (8d) has no frictional engagement with the compensating rail (8a) when the housing (8c) moves up and down slowly, and operate so that the wedge (8d) is brought into frictional engagement with the compensating rail (8a) when the housing (8c) is quickly pushed up.

Description

Elevator restraints and elevator installations

technical field

The present invention relates to an elevator restraint device and an elevator device, which are applicable to the elevator restraint device and the elevator device which avoid the frictional combination of the restraint device and wedges caused by the shortening of the sling.

Background technique

Conventionally, in an elevator device, there is an elevator car and a counterweight suspended in a barrel shape by a main rope wound on a sheave of a traction machine, and a U-shaped suspension is suspended from the lower part of the elevator car and the counterweight. The compensating sling is hung, and the compensating sling is wound on a compensating pulley provided at the bottom of the lifting passage to bear the downward tension.

As mentioned above, the elevator car and the counterweight are connected by the main rope and the compensation rope. will bounce. In order to prevent the compensation pulley from bouncing, a binding device is provided, and the position of the compensation pulley is limited by the binding device. As shown in Patent Document 1, when the restraint device is subjected to an upward force due to an emergency stop of the elevator, the restraint device quickly becomes restrained on the compensating guide rail due to the action of the wedge provided in the restraint device. .

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2007-84290

Contents of the invention

The problem to be solved by the invention

However, the elevator's main rope and compensating rope will shorten due to temperature or environment. When the sling is shortened like this, the compensating pulley rises slowly. Even when the compensating pulley rises slowly, the housing of the restraining device is lifted by the compensating pulley, and the restraining device becomes an operating state. The working state of the restraint device refers to the state in which the case of the restraint device is lifted by the compensating pulley, the wedge is engaged between the case and the compensating guide rail, and the wedge is frictionally combined with the compensating guide rail.

When the wedge is frictionally coupled with the compensating guide rail, even if the sling is elongated due to changes in humidity, environment, or elongation over the years, the frictional coupling of the wedge in the restraint device is maintained, and the casing and the compensating pulley are also maintained. The state of being jacked up. In this way, when the compensating pulley does not descend and the load is not applied, the elevator cannot be operated safely. Therefore, conventionally, the frictional coupling of the sprags has been properly released through maintenance work.

The present invention has been made in consideration of the above problems, and proposes an elevator restraint device and an elevator device capable of preventing frictional coupling of wedges caused by shortening of ropes of the elevator device.

Technical solutions for solving problems

In order to solve this problem, the present invention provides a restraint device for an elevator, which includes: a casing supported so as to be movable up and down along a compensating guide rail, and has an inclined surface facing the compensating guide rail and gradually expanding upward; A wedge capable of frictionally combining with the compensating guide rail is arranged in the gap between the compensating guide rail and the inclined surface of the casing; the roller is clamped by the inclined surface of the casing and the opposite surface of the wedge , and rotate on the inclined surface of the casing and the wedge; and a supporting member supporting the wedge, the supporting member operates so that when the casing moves up and down slowly, The wedge is supported at a height position where it is not frictionally combined with the compensating guide rail, and the wedge is frictionally combined with the compensating guide rail when the casing is quickly lifted up.

According to this structure, when the restraint device is in an emergency, that is, when the elevator stops suddenly, the restraint device will not hinder the combination of the wedges that are carried out by the rise of the casing of the restraint device. The support member at the height position of the frictional engagement of the compensating rail prevents the frictional engagement of wedges between the casing and the compensating rail as a result of the slow rise of the casing caused by the shortening of the sling. Thereby, without impairing the function of the restraint device in emergency, the casing can be made to follow the expansion and contraction of the main rope and the compensating rope during normal times, and the elevator can be kept in a safe state.

The effect of the invention

According to the present invention, it is possible to prevent the sprags from binding due to the rise of the restraint device due to the emergency stop of the elevator apparatus, and to prevent the frictional engagement of the sprags due to the shortening of the ropes of the elevator apparatus, so that the elevator can always be kept in a safe state.

Description of drawings

Fig. 1 is a schematic configuration diagram of an elevator according to one embodiment of the present invention.

Fig. 2 is a longitudinal sectional view of the restraint device of this embodiment.

FIG. 3 is a conceptual diagram illustrating a normal restraint device according to the embodiment.

FIG. 4 is a conceptual diagram illustrating the restraint device at the time of abnormality according to the embodiment.

FIG. 5 is a conceptual diagram illustrating a restraint device in an abnormal state according to the embodiment.

detailed description

One embodiment of the present invention will be described in detail below with reference to the drawings.

First, the outline of the elevator apparatus will be described with reference to FIG. 1 . As shown in FIG. 1 , an elevator apparatus 10 includes an elevator car 4 and a counterweight 5 suspended in a bucket shape by a main rope 3 wound around a sheave 1 and a guide sheave 2 of a hoisting machine. The rotational torque of the sheave 1 is transmitted to the main rope 3 through the frictional force generated by the main rope 3 and the sheave 1 , and the elevator car 4 and the counterweight are raised and lowered opposite to each other via the main rope 3 .

Furthermore, the elevator device 10 includes: a compensating sling 6 connected to the lower part of the elevator car 4 and the counterweight 5; a compensating pulley 7 arranged at the lower end of the compensating sling 6; and a position restriction is performed in order to prevent the compensating pulley 7 from bouncing. and the emergency stop device 9 that makes the car 4 emergency stop when it is detected that the lifting speed of the car 4 exceeds a predetermined value.

Next, the structure of the restraint device 8 will be described with reference to FIG. 2 . As shown in FIG. 2, the restraint device 8 mainly includes a casing 8c, a wedge 8d, a roller 8e, a spring body 8f, and a bolt 8g.

The cabinet 8c is supported so as to be movable up and down along a compensation guide rail 8a erected near the compensation pulley 7 . In addition, the casing 8c has an inclined surface 8b facing the compensating guide rail 8a and gradually expanding upward.

The wedge 8d is arranged in a gap between the compensation guide rail 8a and the inclined surface 8b of the housing 8c, and is arranged so as to be frictionally coupled with the compensation guide rail 8a. The roller 8e is sandwiched by the inclined surface 8b of the casing 8c and the opposing surfaces of the wedge 8d, and rotates on the inclined surface 8b and the wedge 8d. The spring body 8f is installed between the lower end of the wedge 8d and the bottom of the casing 8c to support the wedge 8d. The bolt 8g keeps the spring body 8f in an erected state.

In addition, as shown in FIG. 3 , the casing 8c includes a holding member 8h for holding the casing 8c at a predetermined height position of the compensation guide rail 8a, and a buffer spring (not shown) extending upward from the upper portion of the casing 8c to support it. The Rod 8i.

Returning to Fig. 2, in an emergency, that is, when the elevator car 4 or the counterweight 5 stops suddenly due to the emergency stop device 9, etc., the compensating pulley 7 springs up, and the casing 8c is quickly jacked up, the spring body 8f and the bolt 8g Can not hinder the rising of casing 8c.

In addition, the spring body 8f and the bolt 8g are constituted as a support member that normally supports the wedge 8d at a height position where it is not frictionally engaged with the compensation rail 8a. Specifically, as shown in FIG. 2, the wedge 8d is supported by the spring body 8f and the bolt 8g at a height with a gap provided between the compensation guide rail 8a. The elastic force of the spring body 8f is set to a value capable of supporting the self-weight of the wedge 8d without being compressed by the rise of the housing 8c caused by shortening of the cable.

For example, when the main rope 3 and the compensation rope 6 shorten according to the temperature or the environment, the compensation pulley 7 rises slowly. In the state of Fig. 2, the compensating pulley 7 rises slowly, and when the compensating pulley 7 lifts up the case 8c of the restraint device 8, the spring body 8f is not compressed during the slow rise of the case 8c caused by the shortening of the sling. . That is, when the casing 8c is slowly raised, the spring body 8f supports the self-weight of the wedge 8d, and pushes up the wedge 8d in accordance with the movement of the casing 8c.

In this way, even if the main sling 3 or the compensation sling 6 is shortened, the compensation pulley 7 rises slowly, the casing 8c of the restraint device 8 is slowly lifted up, and the wedge 8d is also jacked up corresponding to the rise of the casing 8c. Therefore, the gap between the wedge 8d and the compensating guide rail 8a remains the same, and the wedge 8d will not be frictionally combined between the casing 8c and the compensating guide rail 8a.

Furthermore, afterward, when the main sling 3 and the compensating sling 6 elongate according to the temperature or the environment, the wedge 8d remains in a state where there is no frictional engagement between the casing 8c and the compensating guide rail 8a, and the casing 8c also follows. The decline of compensating pulley 7 descends together.

On the other hand, for example, in an emergency, that is, when the descending speed of the car 4 exceeds a predetermined value, the emergency stop device 9 is activated to cause the car 4 to stop suddenly. In this case, at the same time as the car 4 stops abruptly, the counterweight 5 also bounces up due to its inertial force, and the end of the compensating sling 6 on the counterweight 5 side is quickly pulled up. Moreover, when the end on the side of the counterweight 5 is pulled up quickly, the compensating pulley 7 also springs up, as shown in FIG. 4 , the compensating pulley 7 collides with the casing 8c, and the casing 8c is jacked up.

When the casing 8c is quickly jacked up like this, as shown in FIG. 5, the spring body 8f is compressed, and the wedge 8d is jacked up. The wedge 8d is then frictionally engaged between the casing 8c and the compensating rail 8a. Like this, through wedge 8d is frictionally combined between casing 8c and compensating guide rail 8a, restraint device 8 becomes active state, prevents compensating pulley 7 from rising, and the position of compensating pulley 7 is limited. The elastic force of the spring body 8f is set as described above so that it will not be compressed due to the rise of the casing 8c caused by the shortening of the sling, and can support the self-weight of the wedge 8d, and is set so that the casing 8c is quickly lifted. In the case of jacking up, the wedge 8d is coupled (engaged) with the compensation guide rail 8a using the inertial force of the wedge 8d.

As described above, the restraint device 8 in this embodiment is provided with a support member (spring) that does not hinder the rise of the casing 8c in an emergency, and supports the wedge 8d at a height position that does not frictionally engage with the compensating guide rail 8a in normal times. Body 8f and bolt 8g) can prevent the wedge 8d from being frictionally combined between the casing 8c and the compensating guide rail 8a caused by the slow rise of the casing 8c caused by the shortening of the sling. Thereby, without impairing the original function of the restraint device 8 in an emergency, the casing 8c can be made to follow the extension and contraction of the main rope 3 and the compensating rope 6 in a normal state, and the elevator can be kept in a safe state.

Among them, in the above-mentioned embodiment, the spring body 8f and the bolt 8g constitute a support member that does not hinder the rise of the casing 8c in an emergency, and supports the wedge 8d at a height position that is not frictionally coupled with the compensating guide rail 8a in normal times. If it is a value that can be set to support the self-weight of the wedge 8d without being combined with the compensation guide rail 8a when the casing 8c moves up and down slowly, and to use the wedge 8d when the casing 8c is quickly pushed up The elastic body whose inertial force makes the wedge 8d and the compensating guide rail 8a bonded is not limited to this example.

Symbol Description

1 sheave

2 guide wheels

3 main sling

4 cars

5 counterweights

6 compensating sling

7 Compensation pulley

8 restraints

8a Compensation rail

8b inclined surface

8c case

8d wedge

8e roller

8f spring body

8g bolt

8h holding parts

8i pole

9 Emergency stop device

10 Elevator installation

Claims (as amended under Article 19 of the Treaty)

1. (after modification) a restraint device for an elevator, characterized in that it comprises:

The casing, which is supported in a manner capable of moving up and down along the compensating guide rail, has an inclined surface opposite to the compensating guide rail and gradually expanding upward;

a wedge, which is arranged in the gap between the compensation guide rail and the inclined surface of the casing, and can be frictionally combined with the compensation guide rail;

a roller clamped by and rotatable on the inclined surface of the casing and the opposing surface of the wedge; and

a support member supporting the wedge,

The supporting member acts so that when the casing moves up and down slowly, the wedge is supported at a height position without frictional engagement with the compensating guide rail, and when the casing is quickly jacked up In the case of , the wedge is frictionally combined with the compensating guide rail,

The supporting part is composed of an elastic body installed between the lower end of the wedge and the bottom of the casing. The elastic force of the elastic body does not interfere with the compensating guide rail when the casing moves up and down slowly. In combination, the amount of compression of the elastic body is set to the value of the self-weight of the supporting wedge, and when the casing is quickly jacked up, it is set so that the inertial force of the wedge can be used to make the wedge Combined with the compensating rail.

2. (deleted)

3. The restraint device of an elevator as claimed in claim 1, characterized in that:

The supporting part is composed of a spring body and a bolt. When the casing moves up and down slowly, the spring body is not compressed, but the wedge is raised or lowered correspondingly to the movement of the casing , when the casing is quickly lifted, the spring body is compressed, so that the wedge is frictionally coupled between the casing and the compensating guide rail.

4. (After modification) an elevator device, characterized in that it comprises:

The elevator car and the counterweight are suspended in the shape of a bucket by the main sling wound on the sheave of the traction machine;

compensating slings connected to the elevator car and the lower portion of the counterweight;

a compensating pulley disposed at the lower end of said compensating sling; and

restraint means that limit the position of the compensating pulley,

The restraints include:

The casing, which is supported in a manner capable of moving up and down along the compensating guide rail, has an inclined surface opposite to the compensating guide rail and gradually expanding upward;

a wedge, which is arranged in the gap between the compensation guide rail and the inclined surface of the casing, and can be frictionally combined with the compensation guide rail;

a roller clamped by and rotatable on the inclined surface of the casing and the opposing surface of the wedge; and

a support member supporting the wedge,

The supporting member acts so that when the casing moves up and down slowly, the wedge is supported at a height position without frictional engagement with the compensating guide rail, and when the casing is quickly jacked up In the case of , the wedge is frictionally combined with the compensating guide rail,

The supporting part is composed of an elastic body installed between the lower end of the wedge and the bottom of the casing. The elastic force of the elastic body does not interfere with the compensating guide rail when the casing moves up and down slowly. In combination, the amount of compression of the elastic body is set to the value of the self-weight of the supporting wedge, and when the casing is quickly jacked up, it is set so that the inertial force of the wedge can be used to make the wedge Combined with the compensating rail.

5. The elevator device according to claim 4, characterized in that:

It also includes an emergency stop device, which makes the elevator car emergency stop when it is detected that the lifting speed of the elevator car exceeds a predetermined value,

The supporting member operates so that the sprag is normally supported at a height position where it is not frictionally coupled with the compensating guide rail, and when the elevator car is stopped in an emergency by the emergency stop device, The wedge is frictionally engaged with the compensating rail.

Claims (5)

1. the restraint device of an elevator, it is characterised in that including:

Casing, its by along compensate guide rail can be supported by the way of moving up and down, have relative with described compensation guide rail and Go the inclined plane gradually expanded upward；

Voussoir, in the gap of its inclined plane being arranged in described compensation guide rail and described casing, it is possible to rub with described compensation guide rail Wipe and combine；

Roller, it is clamped by the inclined plane of described casing and the apparent surface of described voussoir, and can inclining in described casing Rotate on inclined-plane and described voussoir；With

Support the supporting parts of described voussoir,

Described supporting parts carry out action, so that in the case of described casing moves up and down lentamente, being propped up by described voussoir Hold at the height and position not being combined with described compensation rail friction, in the case of described casing is by quick jack-up, make described Voussoir is combined with described compensation rail friction.

2. the restraint device of elevator as claimed in claim 1, it is characterised in that:

Described supporting parts are made up of the elastomer being arranged between described voussoir lower end and described bottom of shell, described elastomer Elastic force be set as value as described below: in the case of described casing moves up and down lentamente not and described compensation guide rail knot Close, and the decrement of described elastomer is set as the value of deadweight of supporting wedges, in the case of described casing is by quick jack-up, The inertia force utilizing described voussoir can make described voussoir be combined with described compensation guide rail.

3. the restraint device of elevator as claimed in claim 2, it is characterised in that:

Described supporting parts are made up of spring body and bolt, in the case of described casing moves up and down lentamente, and described spring Body is not compressed, and makes described voussoir and the action of described casing correspondingly rise or fall, in described casing by quick jack-up In the case of, described spring body is compressed, and makes described voussoir frictional engagement between described casing and described compensation guide rail.

4. a lift appliance, it is characterised in that including:

Lift car and counterweight, suspend setting in midair the main hoist cable well-bucket shape being wound onto on the rope sheave of traction machine；

Compensating hoist cable, it is connected with the bottom of described lift car and described counterweight；

Compensating sheave, it is arranged in the bottom of described compensation hoist cable；With

Restraint device, the position of its described compensating sheave of restriction,

Described restraint device includes:

Casing, its by along compensate guide rail can be supported by the way of moving up and down, have relative with described compensation guide rail and Go the inclined plane gradually expanded upward；

Voussoir, in the gap of its inclined plane being arranged in described compensation guide rail and described casing, it is possible to rub with described compensation guide rail Wipe and combine；

Roller, it is clamped by the inclined plane of described casing and the apparent surface of described voussoir, and can inclining in described casing Rotate on inclined-plane and described voussoir；With

Support the supporting parts of described voussoir,

Described supporting parts carry out action, so that in the case of described casing moves up and down lentamente, being propped up by described voussoir Hold at the height and position not being combined with described compensation rail friction, in the case of described casing is by quick jack-up, make described Voussoir is combined with described compensation rail friction.

5. lift appliance as claimed in claim 4, it is characterised in that:

Also include emergency braking device, when the rising or falling speed detecting described lift car has exceeded setting, make described electricity Ladder car emergent stopping,

Described supporting parts carry out action so that when usual, described voussoir is bearing in not with described compensation rail friction In conjunction with height and position, in the case of emergent stopping, make described voussoir because of described emergency braking device at described lift car Be combined with described compensation rail friction.