KR930000127Y1 - Device for preventing reverse used in escalator - Google Patents

Abstract

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Description

Anti-rotation device of escalator

FIG. 1 is a front view seen from the line AA ′ of FIG. 2 showing the installation state of the conventional ratchet wheel 4 and shoe 5; FIG.

2 is a schematic configuration diagram of a conventional anti-rotation device of the escalator.

3 is a block diagram of an anti-rotation device of the escalator according to the present invention.

4 is an enlarged view of the main part of part 3 of FIG.

5 is a schematic view showing the installation position of the reverse rotation prevention device of the escalator.

* Explanation of symbols for main parts of the drawings

7, 27: main sprocket 8: drive chain

9, 29: ratchet arm 10: main shaft

11, 21: Ratchet 12, 22: Ratchet Home

22A: Ratchet groove slope 24: Fixture

29A: Ratchet arm slope 29B: Bent part

36: pin 38: spring

39: pedestal

The present invention relates to a device for preventing the reverse rotation of the escalator to prevent the escalator to slip or reverse rotation due to overload.

The anti-rotation device of the present invention is a safety device designed to be rotated in only one direction. When the passenger moves up and down by driving the motor by walking the chain of the sprocket of the escalator, it may be overloaded and slip may occur. This is to prevent the factors that exist.

In the conventional escalator reverse rotation prevention device, as shown in FIG. 2, at the end of the ratchet wheel 4, the shoe 5 is connected to the drive chain 8 between the drive sprocket 6 and the main sprocket 7. On the other side of the ratchet wheel (4) on the opposite side, the ratchet arm (9) is fixed to the end of the ratchet wheel (4), and the main sprocket (7) is fixed to the main shaft (10) In the ratchet 11 is formed.

FIG. 1 is a schematic front view seen from the line AA ′ of FIG. 2 for showing the installation state of the conventional ratchet wheel 4, in which the mounting fund 2 is fixed to the fixing table 1. As shown in FIG. A pair of ratchet wheels 4 are inserted into the ratchet shaft 3 which extends horizontally through this, and a ratchet arm 9 is installed on the left ratchet wheel 4 and a ratchet wheel 4 on the right ratchet wheel 4. The shoe 5 is placed on the drive chain 8.

5 shows a reference to a position where such a conventional device structure is installed in an elevator.

Referring to the operation of the conventional escalator reverse rotation prevention device, when the drive sprocket 6 is driven, the main sprocket (7) is caught by the drive chain 8 is rotated, and the main shaft (which is integrally fixed together) 10) and the ratchet 11 are also rotated, while the end shoe 5 of the ratchet wheel 4 remains on the drive chain 8, and the ratchet arm 9 of FIG. It will be flipped in the opposite direction of the arrow.

However, if the drive chain 8 is destroyed due to the overload of the escalator or the deterioration of the drive chain 8, the shoe 5 moves in the direction of arrow A by its own weight, and the ratchet shaft 3 fixed therewith is also By rotating, the ratchet arm 9 of the ratchet wheel 4 on the other side is fitted into the ratchet groove 12 machined on the outside of the ratchet 11 to prevent reverse rotation.

However, in this conventional device, since the ratchet arm 9 is operated and fitted into the ratchet groove 12 only when the chain is cut, the ratchet arm is not cut unless the chain 8 is cut when slippage occurs due to overload. (9) does not work and slipping may continue, and even if debris such as dust is inserted between the ratchet shaft (3) and the mounting bracket (2), even if criticism occurs in the chain (8), the ratchet shaft (3) ), The ratchet arm (9) may not swing downward. In addition, in the conventional structure, there are various problems such as complicated structure due to processing and installing the ratchet 11 on the outer circumference of the main sprocket 7.

The present invention is to provide a reverse rotation prevention device that improves the uncertainty of the ratchet operation when the slip occurs due to the overload of the escalator, and also simplifies the complexity of the structure, with reference to FIGS. 3 and 4 below. The configuration will be described in detail.

As shown in FIG. 3, the main sprocket 27 is fixed to both ends of the main shaft 10, and the ratchet groove 22 formed in an annular shape on the side surface of the main sprocket 27 is processed. The ratchet 21 is provided, and the fixing stand 24 is provided at both ends of the main sprocket 27, and the ratchet arm 29 is provided between the fixing stand 24 and the main sprocket 27. FIG. 4 is an enlarged view of part “B” of FIG. 3, and the ratchet arm 29 is mounted to the holder 24. That is, the ratchet arm 29 is connected to the mount 35 attached to the fixing base 24 by the pin 36 so as to be able to pivot about the pin 36. Under this ratchet arm 29, a pedestal 39 is integrally mounted to the holder 24 and a spring 38 is fitted between the pedestal 39. And the end of the ratchet arm 29 is fitted into the ratchet groove 22, urethane (marked with a hatch in the drawing) for preventing noise is integrated on the ratchet arm slope 29A and the ratchet groove slope 22A. Bent portion 29B that is fixed to the upper end of the ratchet arm 29 against the inner vertical wall surface of the holder 24 when the ratchet arm 29 is lifted clockwise when the ratchet arm 29 is reversed at the opposite end. ) Is formed.

Hereinafter, referring to the operation relationship according to the configuration of the present invention, when the main shaft 10 is rotated by receiving power, at the same time the main sprocket 27 is rotated, integrally mounted to the main sprocket 27 When the ratchet 21 also starts to rotate, the ratchet groove 22 is inclined with the inclined surface 22A and the inclined surface 29A of the ratchet arm 29, while the ratchet arm 29 is in the "C" direction. Pushed back At this time, the spring 38 between the pedestal 39 and the ratchet arm 29 is compressed and then returned to its original position so that the ratchet arm 29 is inserted between the ratchet grooves 22. .

However, when the main sprocket 27 rotates in the rotational direction due to overload or other factors, the ratchet arm 29 is caught while the front end portion of the ratchet arm 29 is caught by the friction surface 22B of the ratchet groove 22. Rotates opposite to the "C" direction.

At this time, the bent portion 29B of the ratchet arm 29 is caught on the vertical inner wall surface of the fixing stand 24 and stops the reverse rotation of the main sprocket 27.

Therefore, according to the apparatus for preventing the reverse rotation of the escalator according to the present invention, even if the escalator is overloaded or the driving chain is cut, the escalator does not slip at all.

In other words, since it is possible to always rotate in the forward direction and not rotate in the reverse direction at all, the reverse rotation prevention operation has a very obvious effect as compared with the drive chain, which is a conventional driving body, to prevent reverse rotation.

Claims (2)

In the anti-rotation device of the escalator, the ratchet 21 having the ratchet groove 22 formed in an annular shape and integrally formed on the side surface of the main sprocket 27, and at the opposite positions of the ratchet 21. And a ratchet arm (29) mounted together with the fixing table (24) to engage the groove (22) of the ratchet (21). The ratchet arm 25 is formed on one side of the ratchet arm 25, and the bent portion 29B is formed at the other end thereof to prevent the reverse rotation thereof. And a spring 38 is provided at the lower side of the ratchet arm 25 together with a pedestal 39. The bent portion 29B of the ratchet arm 29 is fixed to the mounting base 35 so as to be pivotable. Anti-rotation device of the escalator, characterized in that the pin 36 is provided.