WO2006033144A1

WO2006033144A1 - Emergency stop device for elevator

Info

Publication number: WO2006033144A1
Application number: PCT/JP2004/013835
Authority: WO
Inventors: Mineo Okada; Kenichi Okamoto; Hiroshi Kigawa
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2004-09-22
Filing date: 2004-09-22
Publication date: 2006-03-30

Abstract

An emergency stop device for a cage has an emergency stop frame that is mounted on the cage and an emergency stop body that is installed on the emergency stop frame and brings the cage into an emergency stop by engaging with a cage guide rail. The emergency stop frame has an emergency stop reception section for receiving the emergency stop body and has a guide shoe reception section. The guide shoe reception section is provided with a cage guide shoe for engaging with the cage guide rail in a normal up and down of the cage.

Description

Elevator emergency stop device

Technical field

[0001] The present invention relates to an emergency stop device for an elevator that is mounted on a car and that makes an emergency stop of a force cage.

Background art

In the conventional elevator apparatus, in order to improve the installation performance, the contact portion of the emergency stop device to the guide rail and the cage material of the car guide show are made of a common member. In other words, the braking surface of the emergency stop device also serves as the guide surface of the car guide shoe (for example, see Patent Document 1).

[0003] Patent Document 1: Japanese Patent Laid-Open No. 61-277579

Disclosure of the invention

Problems to be solved by the invention

[0004] In the conventional elevator apparatus as described above, when the emergency stop device operates, the shoe material melts and disappears, so it is necessary to replace the shrew material each time the emergency stop device is operated. It was.

[0005] The present invention has been made to solve the above-described problems, and is an elevator that can prevent an increase in the frequency of replacement of a car guide shoe while improving the efficiency of installation work. The purpose is to obtain an emergency stop device. Means for solving the problem

An elevator emergency stop device according to the present invention is mounted on a force cage, and is attached to the emergency stop frame, and is engaged with the force guide rail to emergency stop the car. The emergency stop frame is provided with an emergency stop storage part for receiving the emergency stop main body and a guide shoe storage part. The guide shoe storage part is provided with a car guide rail during normal lifting and lowering of the force. Engaging car guide shoe is installed

Brief Description of Drawings FIG. 1 is a configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a side view showing the safety device of FIG.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Embodiment 1.

FIG. 1 is a configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a lift 2 and a counterweight 3 are provided in the hoistway 1. The force cage 2 and the counterweight 3 are moved up and down in the hoistway 1 along a pair of car guide rails 4 and a counterweight guide rail (not shown) installed in the hoistway 1.

On the upper part of the car 2, a pair of upper car guide shrouds 5 that engage with the car guide rails 4 are mounted. A pair of emergency stop devices 6 are provided at the lower portion of the force cage 2 to emergency stop the cage 2 by mechanically engaging with the force guide rail 4.

[0010] In the machine room at the upper part of the hoistway 1 or in the upper part in the hoistway 1, a driving device (lifting machine) 7 for raising and lowering the force 2 and the counterweight 3 is installed. The drive device 7 includes a motor unit, a drive sheave 8 that is rotated by the motor unit, and a brake unit that brakes the rotation of the drive sheave 8. For example, an electromagnetic brake device is used as the brake unit. In an electromagnetic brake device, the brake shoe is pressed against the braking surface by the spring force of the braking spring to brake the rotation of the drive sheave 8, and the brake force is released by exciting the electromagnet. , Braking is released.

In the vicinity of the driving device 7, a deflecting wheel 9 is arranged. A plurality of main ropes 10 (only one is shown in the figure) are wound around the drive sheave 8 and the deflector 9. A car 2 is suspended from the first end 10 a of the main rope 10. A counterweight 3 is suspended from the second end 10 b of the main rope 10. That is, the force 2 and the counterweight 3 are suspended in the hoistway 1 by the main rope 10 in a 1: 1 roving manner.

A speed governor 11 for detecting the speed of the force 2 is installed at the upper part of the hoistway 1.

A governor rope 12 is wound around the governor sheave of the governor 11. In the lower part of the hoistway 1, a governor wheel 13 is arranged. The governor rope 13 is wound around the lower end of the governor rope 12. [0013] From each emergency stop device 6, a pull-up bar 14 for operating the emergency stop device 6 is pulled out. The pull-up bars 14 are connected to each other via a link mechanism 15. Both ends of the governor rope 12 are connected to the link mechanism 15. For this reason, the governor rope 12 is circulated and moved as the force 2 is raised and lowered, and the governor sheave of the governor 11 is rotated at a speed corresponding to the traveling speed of the force 2.

When the traveling speed of the car 2 reaches a preset first overspeed, the energization of the motor unit and the brake unit of the drive device 7 is cut off, and the rotation of the drive sheave 8 is braked. In addition, when the traveling speed (downward speed) of the car 2 reaches the preset second overspeed, the circulation of the governor rope 12 is stopped by the rope catch provided in the governor 11, and the coupling mechanism 15 is As a result, the lifting rod 14 is pulled up, and the emergency stop device 6 is braked.

FIG. 2 is a side view showing the safety device 6 of FIG. An emergency stop frame 31 is fixed to the lower portion of the force 2. The emergency stop frame 31 is provided with an emergency stop housing part (or emergency stop mounting part) 31a and a guide shoe housing part (or guide shoe mounting part) 31b. That is, the emergency stop accommodating portion 3 la and the guide shoe accommodating portion 3 lb are integrally formed. The emergency stop frame 31 is made of, for example, a steel plate. The guide shoe housing part 31b is provided at the lower part of the emergency stop housing part 3la.

[0016] An emergency stop main body 32 is mounted and accommodated in the emergency stop accommodating portion 31a. The emergency stop main body 32 includes a pair of taper members 33, a plurality of pressing springs 34 provided between the taper member 33 and the emergency stop accommodating portion 31a, and a pair of braking pieces (wedge members) 35 facing the taper member 33. And a plurality of rollers 36 interposed between the taper member 33 and the braking piece 35. The components of the emergency stop body 32 are arranged symmetrically around the car guide rail 4.

Each taper member 33 is provided with a tapered surface 33a that faces the car guide rail 4 and whose distance from the car guide rail 4 decreases as it goes upward. Each braking piece 35 faces the tapered surface 33a. Each braking piece 35 is provided with a braking surface 35a facing the force guide rail 4. A pulling rod 14 is connected to each braking piece 35.

When the traveling speed of the force 2 reaches the second overspeed and the pulling bar 38 is pulled up with respect to the car 2 that descends, the braking piece 35 is moved up with respect to the taper member 33. At this time, taper member 3 Since 3 is provided with a tapered surface 33a, the braking piece 35 is also displaced toward the car guide rail 4 and is pressed against the car guide rail 4 by the pressing spring 34. As a result, both side forces of the car guide rail 4 are also sandwiched between the braking pieces 35, and the car 2 is stopped due to the frictional force between the braking piece 35 and the car guide rail 4.

[0019] A pair of lower car guide shoes (sliding guide shoes) 39 are attached and housed inside the guide shoe housing part 31b. The lower car guide shoe 39 is arranged symmetrically around the car guide rail 4. The car 2 is moved up and down in the hoistway 1 by being guided by the car guide rail 4 when the upper car guide show 5 and the lower car guide show 39 are engaged with the car guide rail 4.

When such an elevator apparatus is installed on the site, the emergency stop main body 32 and the lower car guide shoe 39 are installed in the emergency stop frame 31 in advance in the factory. At this time, the emergency stop main body 32 is attached to the emergency stop accommodating portion 31a so that the distance to the center force braking surface 35a of the emergency stop frame 31 is equal on both sides of the center, and at the same time the center of the emergency stop frame 31 and the lower car guide The car guide shoe 39 is mounted in the guide shoe housing 3 lb so that the distance to the guide surface of 39 is equal on both sides of the center. At the installation site, if the emergency stop frame 31 is attached to the car 2 while adjusting only the left and right clearances between the guide surface of the car guide shoe 39 and the car guide rail 4, the distance between the braking surface 35a and the car guide rail 4 The left and right gaps are automatically the same.

[0021] In such an elevator apparatus, the emergency stop body 32 and the cage guide 39 are attached to the common emergency stop frame 31, so that the position adjustment work at the installation site can be greatly reduced. The efficiency of installation work can be improved. Further, since the lower car guide shoe 39 and the braking piece 35 are separate members, the replacement force of the lower force guide shoe 39 does not increase.

In the above example, the sliding guide show is shown as the lower car guide show 39, but the car guide show may be a roller guide show.

Also, in the above example, a one-handed type that presses the braking piece only on one side of the force-carrying guide rail 4 that shows a double-handed type emergency stop body 32 that sandwiches the car guide rail 4 with a pair of braking pieces 35 Use the emergency stop body. [0023] Furthermore, in the above example, the case where the emergency stop device 6 is operated when the second overspeed of the force 2 is mechanically detected by the governor 11 is shown. May be detected electrically (for example, by a calculation process by a computer) and the emergency stop device may be operated. In this case, the emergency stop main body may have an actuator (for example, an electromagnetic actuator) that is driven in response to an input of an electrical activation signal.

[0024] Furthermore, in the above example, the force roving method showing an elevator apparatus in which the force 2 and the counterweight 3 are suspended by the 1: 1 roving method is not limited to this, for example, 2 : 1 roving method!

Claims

The scope of the claims

With an emergency stop frame mounted on the forceps,

An emergency stop main body that is attached to the emergency stop frame and that makes the car stop emergency by engaging the force guide rail.

With

The emergency stop frame is provided with an emergency stop accommodating portion for accommodating the emergency stop main body and a guide shoe accommodating portion,

An elevator emergency stop device in which a car guide shoe that is engaged with the car guide rail when the car is normally raised and lowered is attached to the guide shoe housing portion.