JPS5943781A - Emergency stop device for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of an emergency stop device for an elevator.

First, we will explain the elevator emergency stop device with reference to Figure 1. In the figure, (1) is a rail installed upright in the elevator hoistway (not shown), and (2) is the car that is guided up and down by this rail. (3) is an emergency stop device provided on the elevator body (21), (4) is a brake piece of the emergency stop device (3), which is normally held away from the rail (]) surface, and details Although detailed explanation will be omitted, when the descending speed of the elevating body (2) exceeds a predetermined level, the elevating body (21) will rise against the slope of the fixed part of the emergency device (3) and through the rollers. Rail (1)
Pressed against the surface.

In other words, the brake piece (4) operates at the required time and the rail (+1
The elevating body (2) is braked by the friction between the brake piece (4) and the rail (11) surface.The braking ability between the brake piece (4) and the rail (11) surface is determined by , brake piece (
4) is determined by the product of the pressing forces. Therefore, in order to obtain a small and highly capable emergency stop device (3), it is necessary for K to have a large coefficient of friction and a large pressing force. In order to increase the suppression chip, the brake piece (4) must be made of a material that can withstand high pressure per unit area, and on the other hand, in order to increase the coefficient of friction, a large number of protrusions are provided on the braking surface of the brake piece (4). Te rail (
This increases the engagement with the 11th surface.

However, by providing the brake piece (4) with a protrusion, the effective contact area with the rail (1) surface is reduced, so a brake piece (4) with high pressure resistance is required in this situation.
1j [1b The pressure resistance of the piece (4) is determined by the limit of melting of the braking surface when pressing the rail (11); if melting occurs, the frictional force becomes unstable and the wear and tear of the braking surface increases.1
-Therefore, in order to obtain the required amount of braking performance, the brake piece (4) must be
It should be used within the range where significant melting does not occur between the surfaces of the rail (1) and the rail (1). On the other hand, when the brake piece (4) suppresses the rail (1), the braking surface of the rail (1) shifts due to the lowering of the row descending body (2), and the accumulation of frictional heat is small, so that melting may occur. 1) By increasing the heat resistance of the brake piece (4), it is possible to prevent the braking surface from melting and obtain a braking action at high pressure.
In order to realize this, it is conceivable to construct the braking surface of the pressure damping piece (4) with a ceramic material, but the ceramic material has a problem of lack of toughness.

The present invention solves the above-mentioned drawbacks, and provides an elevator emergency stop device that does not cause problems such as melting of the braking surface, is small, and has a high-capacity braking action.

(3) Hereinafter, one embodiment of the present invention will be explained with reference to FIGS. 2 to 4.

In the figure, the same symbols as in Figure 1 indicate the same parts, ('la
) is a recess provided in the surface of the brake piece (4) facing the rail (1), (4b) is a through hole provided in the recess (4a), and (4C) is a hole provided in the brake piece (4). A recess provided on the side opposite to the recess (4b) and having an enlarged diameter of the through hole (4b), (
5) is a holding plate made of a steel plate disposed with a gap formed between it and the recess (4a).

(5a) is a large number of through holes provided on the surface facing the recess (4a), and (6) is a core material (6a) made of a fibrous material having heat resistance such as carbon fiber. From the mixed lamic material/with the sliding piece fitted into the recess (4a).

(6b) is provided on the minus side of this and is fitted into the through hole (5a), protruding toward the rail (11 side); ) with a threaded rod inserted into it.

(8) is a nut screwed into this and placed on the fourth part (4C).

That is, the sliding piece (6) is fitted into the recess (4a).

Further, the protrusion (6b) is fitted into the through hole (5a) of the holding piece (5), and the holding piece (5) is attached to the brake piece (4) (4) using the threaded rod (7) and nut (8). By this, the brake piece (4)K is held.

Then, the end face of the protrusion (6b) of the sliding piece (6) is pressed against the rail +11 surface by the action of the brake piece (4), but at this time, the sliding piece (6) fits into the recess (4a). Go, Tsushi (6b
) and the through hole (5a), and the brake piece (4) is held by the holding piece (5), so that the load acting on the sliding piece (6) due to friction is transferred to the brake piece (4). Reliable transmission and stable braking action can be obtained. In addition, a retaining plate (5
) and the protrusions (6)) are respectively fitted, so even if a crack occurs in the sliding piece (6), it will remain localized and the sliding piece (6) will not fall off from the retaining plate (5). Therefore, the required braking action can be easily obtained with a small device with low reliability. In addition, the sliding piece (6) is made of a metal retaining plate (5
) Since the heat generated during braking is retained through the retaining plate (
5) to the brake piece (4), the temperature rise of the sliding piece (6) is suppressed, and a stable braking action is obtained. Further, even if the protrusion (6b) of the sliding piece (6) is worn out, the braking ability is not immediately lost because the braking action is provided by the retaining plate (5). In addition, in this embodiment, since the core material (6a) is mixed into the sliding piece (6), the toughness of the ceramic material is increased and no chipping occurs.

As explained above, the main part of this invention is that the brake piece pressed against the rail during operation I2 has a sliding piece made of ceramic material and has a protruding ear protruding from the through hole of the holding plate, and is held in a sandwiched state by the holding plate and the brake piece. It is attached to the brake piece. As a result, the sliding piece is securely held by the brake piece, preventing the sliding piece from falling off, and is small in size, has high braking capacity, and provides stable and highly reliable braking. This realizes a stop device.

[Brief explanation of the drawing]

Fig. 1 is a conceptual side view of the essential parts of an elevator system showing an elevator emergency stop system, and Fig. 2 is an enlarged view of the ■ section of Fig. 1 showing an embodiment of an elevator emergency stop system according to the present invention. , Figure 3 is a left side view of the brake piece in Figure 2, and Figure 4 is a left side view of the brake piece in Figure 2.
It is a sectional view taken along line N-N in FIG. (1) is the rail, (2) is the elevating body, (4) is the brake piece, (
5) is a retaining plate t; (5a) is a through hole; (6) is a sliding piece + (6b) is a protrusion. In Figure 9, the same or equivalent parts are indicated by the same reference numerals. Agent Makoto Kuzuno - (7) Juku Isshiki Showa 1999 Month 1-1 Indication of the case of assaulting a license office engineer (invention of QI No. 151904, 1982) Name Relationship to the case of the person who supplemented the emergency stop device of an elevator Patent Applicant Representative Hitoshi Katayama Department Attorney 11'-, Address: 2-1 Marunouchi, Chiyoda-ku, Tokyo]
No. 2; No. 3, No. 5, Column 6 of the scope of claims of Book J, and the scope of claims of the internal specification of the vehicle stop, are corrected as shown in the attached appendix. Above (2) %+lr'fClaimsIn the example of the brake piece that is provided on the elevating body guided by the rail and has a brake piece that operates in the main part and is pushed by the upper d-pillar, there are many through holes. A holding plate is provided and attached to the surface of the braking piece facing the rail, and a retaining plate is made of a ceramic material, and protrusions corresponding to the through holes are provided on the minus side, and all of these protrusions are made to pass through the second period. An emergency stop device for an elevator, characterized in that it has a sliding piece that projects from a hole, is disposed between an upper g-pi brake piece and a retaining plate, and is attached to the upper g-d brake piece via the retainer plate.

Claims (1)

[Claims] A lifting body guided by a rail and a braking piece that operates when necessary and presses against the rail,
A retaining plate is provided with a large number of through holes and is attached to the surface facing the rail of the two-part brake piece, and protrusions corresponding to the through holes are provided on the minus side, and these protrusions are attached to the side facing the rail. An emergency stop device for an elevator, comprising a sliding piece that projects from a through hole, is disposed between the brake piece and a holding plate, and is attached to the brake piece via the holding plate.