JPS5859181A - Elevating object fall prevention device - 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 an elevating object fall prevention device, and more particularly to an elevating object fall prevention device suitable for indirect type elevators such as hydraulic elevators with nine cars.

Conventional fall prevention devices of this type include those that operate in conjunction with a speed governor, as well as slack cable type devices that operate by detecting breakage or loosening of the main rope.

The slack cable type drop prevention device shown in Figures 1 to 3 is equipped with a roller 9 under the floor of the car that is in contact with the main rope 8, and is configured to operate by detecting changes in the tension of the main rope 8. It is. However, the vibration generated by the contact between the main rope 8, which is made up of a plurality of twisted wires, and the roller 9 propagates from the lever mechanism to the car 5, causing abnormal vibrations and noise, especially in cars that do not have a vibration isolator. There was a drawback.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a device for preventing falling of an elevating object, which is highly reliable and does not impair riding comfort.

The vibration transmission points were confirmed, and the elastic body was inserted at the position where it had the highest isolation effect. In addition, consideration was given to the structure of the elastic body so that it would not impair its original function as a fall prevention device.

The present invention will be described with reference to FIGS. 1-4.

A guide rail 2, a lobe end 3, and a hydraulic jack 4 are arranged in the hoistway 1, and a rail guide 6 that engages with the guide rail 2, a complete pulley 7, and a main rope stretched in a U-shape are provided on one side of the liftway 1. 8, the seat 5 is raised and lowered by the vertical movement of the hydraulic jack 4. Reference numeral 9 denotes a detection roller disposed between the pulleys 7 and rolling in contact with the main rope 8, which will be described in detail in FIGS. 2 and 3.

A bracket 10 is fixed to the lower part of the seat 5, and a fulcrum shaft 11 is fixed.
The rotary lever 12 is rotatably supported.

A detection roller 9 is fixed to the rotation lever 12, and a compression spring 1
3, it is constantly pressed against the main rope 8 with a predetermined pressure. The connecting rod 14 transmits the movement of the rotating lever 12 to a shaft 15, and arms 16 are connected to both ends of the shaft 15, and the ends of the arms 16 are connected to a brake of a catch block 17. When the main rope 8 is cut or loosened, the balance between the compression spring force of the detection roller 9 and the tension of the main rope is lost, and the rotation lever 12
Rotates clockwise around 1. This movement lowers the connecting rod 14, rotates the shaft 15, pulls up the arm 16, causes the brake to engage between the catch block 17 and the guide rail 2, and stops the ride 5 by braking. Reference numeral 18 is a tension spring with an appropriate tension in the counterclockwise direction to prevent malfunction, and reference numeral 19 is a tension spring that allows the rotation lever 12 to be displaced in response to changes in the tension of the main rope 8 due to changes in the loading capacity of the passenger compartment. This is a rotary lever support that prevents the arm 16 from making unnecessary movements.

FIG. 4 is an enlarged cross-sectional view taken along the line X-X in FIG. Vibration caused by the travel of the main rope 8 as the seat 5 moves up and down and the detection roller 9 rolling in contact with the main rope 8 has a high contact pressure and is most likely to propagate from this position at the shortest distance.

Therefore, with the intervention of the elastic body 20, it is possible to efficiently block vibration-transmitted noise and provide a comfortable ride.

21 is a beam having pulleys 7 fixed to both ends and a bracket 1o fixed to the middle part.

According to the present invention, since vibration transmission can be cut off, abnormal noise can be prevented.
It is possible to provide an elevating object fall prevention device that prevents the occurrence of abnormal vibrations and does not impair riding comfort.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing a passenger seat equipped with a device for preventing falling of elevating objects, Fig. 2 is an enlarged side view of its main parts, Fig. 3 is a view from P of Fig. 2, and Fig. 4 is a view of Fig. 2. It is an enlarged view of the XX line cross section of. 12... Rotating lever, 19... Rotating lever support, 2
゜Figure 1

Claims (1)

[Scope of Claims] 1. Braking that grips the guide rail by the operation of a tension detection roller of the left main rope provided on the elevating body suspended by the main rope and running along the guide rail, and a lever mechanism interlocked with this roller. An elevating object fall prevention device comprising: an elastic body interposed between a rotating lever (-) constituting the lever mechanism and a rotating lever support portion supporting the rotating lever. A device for preventing falling of an elevating object. 2. A device for preventing falling of an elevating object as described in claim 1, characterized in that the elastic body is a vibration-proof rubber. 3. A device for preventing falling of an elevating object as described in claim 2, An elevating object fall prevention device characterized in that the vibration isolating rubber has a flat plate shape.