JPH05147856A - Elevator emergency stopper - Google Patents

Abstract

PURPOSE:To make stable braking force so as to be secured by getting rid of any variation in braking force being produced at the initial stage of braking in an elevator emergency stopper. CONSTITUTION:A buffer body 11 is installed on top of a braking body 7 or the underside of an upper plate 4. When an emergency stopper operates and the braking body 7 goes up and collides with the upper plate 4, the buffer body 11 absorbs any kinetic energy of the braking body 7, thereby relieving an impact at the collision.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for emergency stop of an elevator.

[0002]

2. Description of the Related Art FIGS.
FIG. 5 is a diagram showing a conventional elevator emergency stop device disclosed in Japanese Patent No. 5178, FIG. 3 is a front view (partially sectional view), FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is a braking force curve diagram. Is.

In FIG. 3 and FIG. 4, (1) is a guide rail standing upright in a hoistway (not shown), (2) is an elevator consisting of a car which is guided by the guide rail (1) to ascend and descend, 3)
Is a frame fixed to the lower part of the lifting body (2), (4) is the upper plate of the frame (3), (5) is pivoted to the frame (3) by the pin (5a), and its front end Is a support extending to the guide rail (1) side, (6) is a support
(5) is a pressing body fixed to the front end of the guide rail.
The surface facing (1) is a guide rail from top to bottom.
An inclined surface is formed that recedes from the side surface of (1).

Reference numeral (7) is provided between the pressing body (6) and the guide rail (1), and a surface facing the pressing body (6) is formed with an inclined surface parallel to the inclined surface of the pressing body (6). It is a wedge-shaped braking body and is configured to be coupled to a speed governor rope (not shown) so that it can be displaced upward. (8) is a roller arranged between the braking body (7) and the pressing body (6), and (9) is a compression coil provided at the rear end of the support body (5).

The conventional emergency stop device for an elevator is constructed as described above, and the braking body (7) is always held away from the side surface of the guide rail (1). When it is detected that the descending speed of the lifting body (2) exceeds a predetermined value, a detailed explanation is omitted, but the braking body (7) is stopped with respect to the space by the action of the speed governor rope. .

However, since the lifting / lowering body (2) descends, the braking body (7) relatively rises and is displaced to the upper plate (4). The compression coil spring (9) is compressed due to the rise of the braking body (7), and the braking body (7) passes through the pressing body (6) and the roller (8).
It is pressed against the side surface of the guide rail (1). As a result, a braking force is generated and the lifting body (2) stops.

[0007]

In the conventional emergency stop device as described above, since the wedge-shaped braking body (7) is relatively raised to the upper plate (4), the braking force is reduced. In the initial state, the braking body (7) is pushed down by the collision between the braking body (7) and the upper plate (4). Then, this state is repeated until the rising speed of the braking body (7) becomes small to some extent.

Along with the lowering of the braking body (7), the pushing open amount of the support body (5) is reduced and the pushing force is reduced. Therefore, as shown by the curve (a) in FIG. 5, the braking force at the initial stage of braking becomes unstable. In particular, as the rated speed of the elevator increases, the ascending speed of the braking body (7) increases, the fluctuation of the braking force at the initial stage of braking is large, and the braking time is long. Further, there is also a problem that the braking body (7) comes into partial contact with the guide rail (1) due to fluctuations in the braking force, causing uneven wear and reducing the braking force.

The present invention has been made to solve the above problems, and it is an object of the present invention to provide an elevator emergency stop device capable of stopping an elevating body with a stable braking force even in an ultra-high speed elevator. To aim.

[0010]

An emergency stop device for an elevator according to the present invention is provided with a buffer member on the upper surface of a braking body or the lower surface of a frame body in which the braking body is housed.

[0011]

In the present invention, since the shock absorber is provided on the upper surface of the brake body or the lower surface of the frame body, when the brake body and the frame body collide,
The kinetic energy of the braking body is absorbed by the buffer body.

[0012]

【Example】

Example 1. FIG. 1 is a front view (partial cross section) showing an embodiment of the present invention, and the same parts as those of the conventional device are designated by the same reference numerals.

In the figure, (11) is the upper surface of the braking body (7),
It is a cushioning body made of an elastic body such as rubber fixed by a bolt or an adhesive.

In the emergency stop device of the elevator constructed as described above, when the braking body (7) rises and collides with the upper plate (4) in an emergency, the buffer body (11) causes the braking body (11) to move. By absorbing the kinetic energy of 7), the impact at the time of the collision is mitigated. Therefore, as shown by the curve (b) in FIG. 5, the fluctuation of the braking force at the initial stage of braking is suppressed, and the braking body (7) immediately contacts the upper plate (4).

Example 2. In the first embodiment, the cushioning body (11) is provided on the upper surface of the braking body (7), but the cushioning body (11) may be provided on the lower surface of the upper plate (4) as shown in FIG.

[0016]

As described above, according to the present invention, since the buffer body is provided on the upper surface of the braking body or the lower surface of the frame body facing the braking body, the kinetic energy of the braking body is reduced when the braking body and the frame body collide. The effect of being able to stop the lifting / lowering body safely by eliminating the fluctuation of the braking force which is absorbed by the cushioning body and which occurs at the initial stage of braking.

[Brief description of drawings]

FIG. 1 is a front view (partial cross section) showing a first embodiment of the present invention.

FIG. 2 is a partial front view (partial cross section) showing a second embodiment of the present invention.

FIG. 3 is a front view (partially sectional view) showing a conventional emergency stop device for an elevator.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a braking force curve diagram of the safety device of the related art and the present invention.

[Explanation of symbols]

 1 Guide rail 2 Elevating body 3 Frame body 4 Frame body (upper plate) 7 Braking body 11 Buffer body

Claims (2)

[Claims] 1. A braking body having a frame body fixed to an elevating body guided by a guide rail, displaceably accommodated in the frame body, displaced to a braking position when necessary, and pressed by the guide rail. An emergency stop device for an elevator, characterized in that a buffer is provided on an upper surface of the braking body. 2. A braking body having a frame body fixed to an elevating body guided by a guide rail, displaceably accommodated in the frame body, displaced to a braking position when necessary, and pressed by the guide rail. An emergency stop device for an elevator, comprising: a buffer body provided on a lower surface of the frame body facing the braking body.