JPH0460909B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an emergency stop device for an elevator,
In particular, the present invention relates to an emergency stop device for an elevator that can improve the reliability of operation when the elevator's descending speed becomes faster than a predetermined value, and is suitable for simplifying the structure.

[Conventional technology]

A conventional structure of an emergency stop device for an elevator is described in Japanese Utility Model Application Publication No. 11249/1983. This will be explained below with reference to FIGS. 5 to 7.

FIG. 5 is an overall view of the elevator emergency stop device, and in the figure, 1 is an elevator car, 2 is a guide rail, and 6 is a rope. 3 is a governor installed in the elevator machine room, 4 is a governor rope, 5 is a tension wheel, 7 is a link,
Its one end is fixed to the governor rope 4, and the other end is connected to a pulling rod 8. 11 is an emergency stop device consisting of a brake 9 and a body 10.

In the above configuration, the car 1 is guided by the rope 6 and the guide rail 2 and travels up and down. At this time, the governor rope 4 also travels through its connection with the link 7, causing the governor 3 to rotate. If the descending speed of the car 1 becomes greater than a predetermined value, the rotational speed of the governor 3 driven by the governor rope 4 will also rise above the predetermined value, and an overspeed detection mechanism such as a centrifugal weight provided inside will operate. (This mechanism is well known, so a detailed explanation will be omitted), and the governor 3 is stopped. Therefore,
The governor rope 4 is also stopped, but since the car 1 is descending, the link 7 pulls up the lifting rod 8 and activates the emergency stop device 11 to bring the car 1 to an emergency stop.

6 is a view taken along the line AA of the safety device 11 shown in FIG. 5, and FIG. 7 is a side view of FIG. 6. In FIG. 6, the brake 9 is normally held by a pulling rod 8 facing the guide rail 2 that guides the car 1.

Here, when the descending speed of the car 1 exceeds a predetermined value, the pulling rod 8 is pulled up, and the brake 9 is lifted upward by a predetermined amount while being guided by the rollers 12, guides 13, guide plates 14, etc. . When the brake element 9 rises by a predetermined amount, the U-shaped elastic body 1 is moved through the roller 12 and the guide 13.
5 is pushed apart by a predetermined displacement amount, and the elastic force of the elastic body 15 acts to push the brake element 9 in the direction of the guide rail 2, so that a predetermined braking force is generated and the car 1 is stopped.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, a convex portion is provided at the upper end and the lower end of the guide 13, and the convex portion is guided by guide grooves 16 and 17 provided in a part of the body 10, and is movable in the horizontal direction with respect to the guide rail 2. Therefore, when the brake element 9 rises by a predetermined amount, the roller 12
The structure is such that the guide 13 is moved through the elastic body 15 to push and spread the elastic body 15 by a predetermined amount of displacement.

However, if concrete powder or dirt gets stuck in the guide grooves 16 and 17 that guide the guide 13 during installation work, it may become difficult for the guide 13 to move smoothly. If disassembly and cleaning before a trial run are neglected in this state, the guide 13 will cause galling with the guide grooves 16 and 17 even if the brake 9 is pulled upward by the lifting rod 8 when the emergency stop device 11 is activated. Therefore, the elastic body 15 cannot be pushed and expanded by a predetermined amount of displacement. For this reason, there was a problem in that the braking force of the emergency stop device 11 could not be sufficiently exerted, and the car 1 could not be braked.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide an emergency stop device for an elevator that is highly reliable and has a simple structure.

[Means for solving problems]

The above purpose is to provide a roller that fits loosely between a brake having a sloped surface and a guide that has a sloped surface, a roller that is fixed to the guide and loosely fits into a hole of a U-shaped elastic body, and an elastic body that is attached to the other end of the roller. A member is provided and a pull bolt is supported movably in the axial direction by the elastic force of the elastic member, and the guide is rotatably supported using a semi-arc shaped curved surface provided on the guide as a fulcrum. I tried to achieve it.

[Effect]

When the pulling rod is pulled up, the brake element is guided by the slope formed by the roller and the guide and rises, pushing the elastic body apart. At this time, there is no guide groove to guide the guide, and the guide is guided by a pull bolt that is fixed to the guide and configured to loosely fit into the U-shaped elastic body's loose fitting hole. No galling of the guide occurs.

〔Example〕

The present invention will be explained in detail below using the embodiments shown in FIGS. 1 to 4.

FIG. 1 is a front view showing an embodiment of the emergency stop device for an elevator according to the present invention, and FIG.
- This is a cross-sectional view taken along line B. In Figures 1 and 2, 2 is a guide rail, 8 is a pulling rod, 9 is a brake, 10 is the body of the emergency stop device, 12 is a roller, 13 is a guide, 14 is a guide plate, 1
5 is a U-shaped elastic body.

A plurality of connected rollers 12 facing the slope provided on the brake 9 and a guide 13 having a slope surface in contact with the roller 12 are provided, and the brake 9 is guided upward by the slope formed by the roller 12. It is becoming movable. The plurality of rollers 12 are
Each is rotatably connected by a connecting member,
The roller 12 is fitted between the brake 9 and the guide 13, and a guide plate 14 and a guide plate 27 that hold the brake 9 and guide it upward are fixed to the guide 13.

Further, a retaining plate 20 for holding the roller 12 is fixed to the guide 13 with bolts 21, and a semi-arc shaped plate is provided on the opposite side of the sloped surface in contact with the roller 12, as shown in FIG. It has a curved surface 28 , and is configured to come into contact with the elastic body 15 via a liner 26 provided to adjust the gap between the brake element 9 and the guide rail 2 . Curved surface 28 of guide 13
A tension bolt 18 is fixed to the elastic body 15.
The pull bolt 18 fits loosely into the loose fit hole 29 provided in the
A stopper 24 and a nut 25 are provided at the other end of the tension bolt 18, and an elastic member 19 is fitted between the stopper 24 and the elastic body 15, so that the brake 9, the roller 12, and the guide 13 are connected to the shaft of the tension bolt 18. The guide 13 is held so as to be movable in the direction, and is rotatably supported by a minute displacement using the curved surface 28 of the guide 13 as a fulcrum.

Brake element 9 and roller 12 configured as above
and a U-shaped elastic body 15 containing a guide 13.
As shown in FIG. 2 and FIG.
It is maintained at. Elastic body 1 via presser plate 22
5 is held at the neutral point when the U-shaped elastic body 15 is displaced, that is, on the extension line of the guide rail 2 in the rail gauge direction, and at the intersection of this extension line and the U-shaped elastic body 15. This position is desirable in order not to restrict the predetermined displacement of the elastic body 15 when the brake element 9 operates. Incidentally, FIG. 4 is a diagram showing another embodiment of the method of fixing the elastic body 15.

If configured as above, the pulling rod 8
When the brake element 9 is pulled upward, the brake element 9 receives the elastic force of the elastic body 15 while being in contact with the guide rail 2, so that the brake element 9 is always parallel to the contact surface with the guide rail 2. At this time, the U-shaped elastic body 15 is displaced, but as mentioned above, it is rotatable around the semi-arc curved surface of the guide 13 as a fulcrum, and performs a so-called centering action, so that the brake 9 can be reliably moved. It rises by a predetermined amount and receives the elastic force of the elastic body 15 via the roller 12 and guide 13, so that the braking force of the emergency stop device can be reliably exerted.

Further, in the case of the embodiment of the present invention, there is no need to provide guide grooves in the body 10 and guide 13 as in the conventional structure, so that the structure can be simplified.

〔Effect of the invention〕

As explained above, according to the present invention, when the pulling rod is pulled up, that is, when the emergency stop device is activated, the galling phenomenon between the guide and the guide groove can be prevented even if disassembly and cleaning before trial operation is neglected. This does not occur, and the brake element is reliably pulled up, displacing the U-shaped elastic body by a predetermined amount via the rollers and guides, thereby reliably exerting braking force and improving the reliability of the emergency stop device. This has the effect of simplifying the structure of the body.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the emergency stop device for an elevator according to the present invention, and FIG.
B-line sectional view, Figure 3 is a CC-line sectional view of Figure 2,
FIG. 4 is a sectional view showing another embodiment of FIG.
The figure is an overall configuration diagram showing a conventional emergency stop device for an elevator, FIG. 6 is a view from A in FIG. 5, and FIG. 7 is a side view of FIG. 6. 2...Guide rail, 8...Lifting rod, 9...Brake, 10...Body, 12...Roller, 13...Guide, 15...Elastic body, 18...Tension bolt, 19...Elastic member, 22...Press plate, 23...Bolt , 28... Semi-arc-shaped curved surface, 29... Loose fitting hole.

Claims (1)

[Scope of Claims] 1. An elevator comprising a brake element having sloped surfaces arranged horizontally to face each other so as to sandwich guide rails that guide the elevator, and a U-shaped elastic body containing the brake element. The emergency stop device includes a roller that fits loosely between the brake element and a guide having a sloped surface, a roller that is fixed to the guide and loosely fits into the hole of the elastic body, and an elastic member at the other end. and a pull bolt supported movably in the axial direction by the elastic force of the elastic member,
Using the semi-arc shaped curved surface provided on the guide as a fulcrum,
An emergency stop device for an elevator, characterized in that the guide is rotatably supported. 2. The emergency stop device for an elevator according to claim 1, wherein the elastic body is held down by a holding means at the intersection of the guide rail with the extender in the rail gauge direction.