WO2015125294A1

WO2015125294A1 - Elevator tie-down device and elevator device

Info

Publication number: WO2015125294A1
Application number: PCT/JP2014/054295
Authority: WO
Inventors: 中山　徹也; 薫平野; 雄大田中
Original assignee: 株式会社日立製作所
Priority date: 2014-02-24
Filing date: 2014-02-24
Publication date: 2015-08-27
Also published as: JPWO2015125294A1; CN105899452A

Abstract

[Problem] To prevent frictional engagement with a wedge due to rope shrinkage of an elevator device. [Solution] 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 tie-down device and elevator device

The present invention relates to an elevator tie-down device and an elevator device, and is suitably applied to an elevator tie-down device and an elevator device that avoids frictional engagement between the tie-down device and a wedge due to rope contraction.

Conventionally, elevator devices are provided with a carriage and a counterweight suspended in a suspended manner by a main rope wound around a sheave of a hoist, and a compensating rope is U-shaped from the bottom of a car and the counterweight. And a compensating rope is wound around a compensating pulley provided at the bottom of the hoistway so that downward tension is applied.

As mentioned above, the balance weight of the elevator system is connected by the main rope and the compensation rope, and when the car or the balance weight is suddenly stopped by the emergency stop device etc., the compensation rope is wound by the force of inertia. , Compen pulleys jump up. A tie-down device is provided to prevent the rebound of the compensating pulley, and the position of the compensating pulley is regulated by the tie-down device. As shown in Patent Document 1, when the tie-down device receives an upward force due to a sudden stop of the elevator, the tie-down device quickly compensates the tie-down device by the function of the wedge provided in the tie-down device. Restrain the rail.

JP 2007-84290 A

By the way, elevator main ropes and compensation ropes may shrink depending on humidity and environment. As the rope shrinks in this way, the compensating pulley rises slowly. Even when the compensating pulley ascends slowly as above, the casing of the tie-down device is pushed up by the compensating pulley, and the tie-down device is in an operated state. When the tie-down device is in operation, that is, the housing of the tie-down device is pushed up by the compensating pulley, the wedge is caught between the housing and the compensating rail, and the wedge and the compensating rail are frictionally engaged It is a state.

Once the wedge and the compensating rail are in frictional engagement, the frictional engagement of the wedge in the tie-down device is maintained even if the rope stretches in response to changes in humidity, environment, age, etc. And the compensation pulley also remains pushed up. As described above, since the elevator can not be operated safely when the compensating pulley is not lowered and no load is applied, conventionally, the frictional engagement of the wedge has been released by a maintenance operation as appropriate.
The present invention has been made in consideration of the above points, and an object of the present invention is to propose an elevator tie-down device and an elevator device capable of preventing frictional engagement of wedges due to rope contraction of the elevator device.

In order to solve such problems, in the present invention, a housing supported so as to be movable up and down along the compen rail, having a sloped surface facing the compen rail facing upward while diverging upward, and the compen An inclined surface of the housing while being held by a wedge which is disposed in a gap between the rail and the inclined surface of the housing and which is frictionally engageable with the compensating rail, and an opposed surface of the inclined surface of the housing and the wedge And a roller rolling on the wedge, and a support member for supporting the wedge, wherein the support member does not frictionally engage the wedge with the compen rail when the housing moves up and down gently. And the wedge is operated to frictionally engage with the compensating rail when the housing is rapidly pushed up. Elevator of the tie-down device is provided.

According to such a configuration, the tie-down device does not prevent the engagement of the wedge due to the rise of the casing of the tie-down device in an emergency, that is, when the elevator suddenly stops, in normal times. And a support member for supporting the wedge at a height position not in frictional engagement with the compensating rail, thereby preventing the wedge from being frictionally engaged between the casing and the compensating rail due to the gradual rise of the casing by rope contraction. be able to. As a result, it is possible to keep the elevator in a safe state by allowing the casing to follow the expansion and contraction of the main rope and the compensating rope at normal times without impairing the function of the tie-down device at the time of emergency.

According to the present invention, it is possible to keep the elevator always in a safe state by preventing the engagement of the wedges by the lift of the tie-down device due to the emergency stop of the elevator device and the frictional engagement of the wedges by the rope contraction of the elevator device. You can keep it.

It is a schematic block diagram of the elevator concerning one embodiment of the present invention. It is a longitudinal cross-sectional view of the tie-down apparatus concerning the embodiment. It is a conceptual diagram explaining the usual tie-down apparatus concerning the embodiment. It is a conceptual diagram explaining the tie-down apparatus at the time of the abnormality concerning the embodiment. It is a conceptual diagram explaining the tie-down apparatus at the time of the abnormality concerning the embodiment.

An embodiment of the present invention will now be described in detail with reference to the drawings.

First, an outline of the elevator apparatus will be described with reference to FIG. As shown in FIG. 1, the elevator apparatus 10 includes a car 4 and a counterweight 5 suspended in a crane shape by a sheave 1 of a hoist and a main rope 3 wound around a diverter 2. The rotational torque of the sheave 1 is transmitted to the main rope 3 by the frictional force generated in the main rope 3 and the sheave 1, and the car 4 and the balance are lifted and lowered in opposition to each other via the main rope 3.

Furthermore, the elevator apparatus 10 regulates the position so that the compensating rope 6 connected to the lower part of the car 4 and the counterweight 5, the compensating pulley 7 disposed at the lower end of the compensating rope 6, and the compensating pulley 7 do not jump up. It comprises a tie-down device 8 and a safety gear 9 for detecting that the elevation speed of the car 4 has exceeded a specified value and stopping the car 4 in an emergency.

Next, the configuration of the tie-down device 8 will be described with reference to FIG. As shown in FIG. 2, the tie-down device 8 mainly includes a housing 8c, a wedge 8d, a roller 8e, a spring 8f and a bolt 8g.

The housing 8 c is supported so as to be vertically movable along a compensating rail 8 a which is provided in the vicinity of the compensating pulley 7. In addition, the housing 8c has an inclined surface 8b that is open wide toward the upper side while facing the compensating rail 8a.

The wedge 8d is disposed in the gap between the compensating rail 8a and the inclined surface 8b of the housing 8c, and is disposed so as to be frictionally engageable with the compensating rail 8a. The roller 8e rolls on the inclined surface 8b and the wedge 8d while being sandwiched by the inclined surface 8b of the housing 8c and the facing surface of the wedge 8d. The spring 8f is interposed between the lower end of the wedge 8d and the bottom of the housing 8c to support the wedge 8d. The bolt 8g holds the spring 8f upright.

Further, as shown in FIG. 3, the housing 8c is extended upward from the upper portion of the housing 8c and a holding member 8h for holding the housing 8c at a predetermined height position of the compensating rail 8a, And a rod 8i for supporting a buffer spring.

Returning to FIG. 2, in an emergency, that is, the car 4 or the counterweight 5 is suddenly stopped by the safety device 9 or the like, and the compensating pulley 7 jumps up and the housing 8c is rapidly pushed up. In this case, it does not disturb the rise of the case 8c.

The spring 8f and the bolt 8g are normally configured as a support member for supporting the wedge 8d at a height position not in frictional engagement with the compensating rail 8a. Specifically, as shown in FIG. 2, the wedge 8d is supported by the spring 8f and the bolt 8g at a height at which a gap is provided between the wedge 8d and the compensating rail 8a. The spring force of the spring 8f is not compressed by the rise of the housing 8c due to the rope contraction, and is set to a value capable of supporting the weight of the wedge 8d.

For example, when the main rope 3 or the compensating rope 6 is shrunk according to the temperature or the environment, the compensating pulley 7 rises slowly. In the state of FIG. 2, when the compensating pulley 7 rises slowly and the compensating pulley 7 pushes up the casing 8c of the tie-down device 8, the spring 8f is compressed when the casing 8c is slowly lifted due to the rope contraction. It will not be done. That is, when the housing 8c rises slowly, the spring body 8f supports the weight of the wedge 8d and pushes up the wedge 8d in accordance with the movement of the housing 8c.

As described above, even if the main rope 3 and the compensating rope 6 are contracted and the compensating pulley 7 is lifted slowly and the casing 8c of the tie-down device 8 is gently pushed up, the wedge 8d is adjusted according to the rise of the casing 8c. It is pushed up. Therefore, the gap between the wedge 8d and the compensating rail 8a is maintained as it is, and the wedge 8d is not frictionally engaged between the housing 8c and the compensating rail 8a.

Furthermore, after that, when the main rope 3 and the compensating rope 6 are extended according to the temperature and the environment, the wedge 8 d is maintained in a state where it is not frictionally engaged between the housing 8 c and the compensating rail 8 a. As the compensating pulley 7 descends, the housing 8c also descends.

On the other hand, for example, in an emergency, that is, when the lowering speed of the car 4 exceeds a specified value, the safety gear 9 may operate to cause the car 4 to stop suddenly. In this case, at the same time as the sudden stop of the car 4, the counterweight 5 jumps up due to its inertia force, and the end of the compensating rope 5 on the counterweight 5 side is rapidly pulled up. Then, when the end on the counterweight 5 side is rapidly pulled up, the compensating pulley 7 also jumps up, and as shown in FIG. 4, the compensating pulley 7 and the housing 8c collide and push up the housing 8c.

When the housing 8c is rapidly pushed up as described above, as shown in FIG. 5, the spring 8f is compressed and the wedge 8d is pushed up. Then, the wedge 8d is frictionally engaged between the housing 8c and the compensating rail 8a. Thus, the wedge 8d is frictionally engaged between the housing 8c and the compensating rail 8a, and the tie-down device 8 is operated, thereby preventing the compensating pulley 7 from rising, and the compensating pulley 7 can be prevented. Position is regulated. As described above, the spring force of the spring 8f is not compressed by the rise of the housing 8c due to the rope contraction, and is set to a value capable of supporting the weight of the wedge 8d, and the housing 8c is rapidly pushed up. In this case, the inertia force of the wedge 8d is set to a value for engaging the wedge 8d with the compensating rail 8a.

As described above, the tie-down device 8 in the present embodiment does not prevent the lifting of the housing 8 c in an emergency, and normally supports the wedge 8 d at a height position not in frictional engagement with the compensating rail 8 a. Support members (springs 8f and bolts 8g) can be provided to prevent the wedge 8d from frictional engagement between the housing 8c and the compensating rail 8a due to the gradual rise of the housing 8c due to the rope contraction. As a result, the housing 8c can follow the expansion and contraction of the main rope 3 and the compensating rope 6 in normal times, without impairing the original function of the tie-down device 8 in an emergency, and the elevator can be maintained in a safe state.

In the embodiment described above, the supporting member for supporting the wedge 8d at a height position not frictionally engaged with the compensating rail 8a in normal times is prevented from the spring 8f and the bolt 8g without preventing the lifting of the housing 8c in an emergency. Although configured, when the housing 8c moves up and down gently, it does not engage with the compensating rail 8a and can be set to a value that supports the weight of the wedge 8d, and when the housing 8c is rapidly pushed up, the wedge 8d The elastic body is not limited to this example as long as it is an elastic body that can be set to a value that causes the wedge 8d and the compen rail 8a to be engaged by the inertia force of.

DESCRIPTION OF SYMBOLS 1 Sheave 2 Brace car 3 Main rope 4 basket 5 Balance weight 7 Compen rope 7 Compens pulley 8 Tie down device 8a Compen rail 8b Inclined surface 8c Casing 8d Wedge 8e Roller 8f Spring body 8g Bolt 8h Holding member 8i Rod 9 Emergency stop device 10 elevator equipment

Claims

A housing supported so as to be capable of moving up and down along the compensating rail, and having an inclined surface facing the compensating rail and being open upward toward the upper side;
A wedge disposed in a gap between the compensating rail and the inclined surface of the housing and frictionally engageable with the compensating rail;
A roller that rolls on the inclined surface of the housing and the wedge while being sandwiched by the opposed surfaces of the inclined surface of the housing and the wedge;
A support member for supporting the wedge;
Equipped with
The support member supports the wedge at a height position not in frictional engagement with the compensating rail when the case moves up and down gently, and when the case is rapidly pushed up, the wedge is removed. An elevator tie-down device characterized in that it operates in frictional engagement with a compensating rail.
The support member is made of an elastic body interposed between the lower end of the wedge and the bottom of the case, and the elastic force of the elastic body is engaged with the compen rail when the case gradually moves up and down. Instead, the amount of compression of the elastic body is set to a value that supports the weight of the wedge, and when the housing is rapidly pushed up, the wedge is engaged with the compensating rail by the inertia force of the wedge. Set to a value,
The elevator tie-down device according to claim 1, characterized in that:
The support member is composed of a spring and a bolt, and when the case moves up and down gently, the wedge is raised or lowered according to the movement of the case without the spring being compressed, The elevator according to claim 2, characterized in that said spring is compressed so that said wedge is frictionally engaged between said housing and said compensating rail when said housing is rapidly pushed up. Tie-down device.
A car and a counterweight suspended like a crane by a main rope wound around a sheave of a hoist,
A compensating rope connected to the lower part of the car and the counterweight;
A compensating pulley disposed at a lower end portion of the compensating rope;
A tie-down device that regulates the position of the compensating pulley;
Equipped with
The tie down device
A housing supported so as to be capable of moving up and down along the compensating rail, and having an inclined surface facing the compensating rail and being open upward toward the upper side;
A wedge disposed in a gap between the compensating rail and the inclined surface of the housing and frictionally engageable with the compensating rail;
A roller that rolls on the inclined surface of the housing and the wedge while being sandwiched by the opposed surfaces of the inclined surface of the housing and the wedge;
A support member for supporting the wedge;
Equipped with
The support member supports the wedge at a height position not in frictional engagement with the compensating rail when the case moves up and down gently, and when the case is rapidly pushed up, the wedge is removed. An elevator apparatus operable to frictionally engage with a compensating rail.
The vehicle further comprises an emergency stop device that detects that the elevator speed of the car exceeds a specified value and performs an emergency stop of the car;
The support member normally supports the wedge at a height position not in frictional engagement with the compensating rail, and the wedge is frictionally engaged with the compensating rail when the emergency stop device stops the safety cage. The elevator apparatus according to claim 4, characterized in that it operates in an interlocking manner.