KR20160000775A

KR20160000775A - Apparatus for preventing reverse rotation of escalator

Info

Publication number: KR20160000775A
Application number: KR1020140078433A
Authority: KR
Inventors: 이현호
Original assignee: 이현호
Priority date: 2014-06-25
Filing date: 2014-06-25
Publication date: 2016-01-05

Abstract

Provided is an apparatus for preventing backlashing of an escalator capable of preventing accidents caused by the backlashing of the escalator by being installed inside the escalator to provide excellent braking power. The apparatus for preventing the backlashing of an escalator according to an embodiment of the present invention stops a rotary shaft which is rotated by power delivered from a motor so as to prevent the backlashing of escalator stairs which move by sprockets installed at both ends of the rotary shaft. The apparatus for preventing the backlashing of the escalator comprises: a backlashing detection unit which detects backlashing of the rotary shaft; a cylindrical brake drum which is installed on the outer peripheral surface of the rotary shaft; a brake unit which stops the rotary shaft by stopping the rotation of the brake drum; and a brake driving unit which drives the brake unit when the backlashing of the rotary shaft is detected by the backlashing detection unit. The brake unit includes a bracket fixed to a structure of the escalator, a rotary member hinged to the bracket to rotate, and a plate which is formed to surround the outer peripheral surface of the brake drum and has both ends disposed in the same direction, wherein one end is coupled to the bracket and the other end is coupled to the rotary member. When the brake driving unit drives the brake unit, the rotary member rotates in a direction opposite to the rotation direction of the brake drum so that the plate further surrounds the outer peripheral surface of the brake drum to be in close contact with the brake drum, thereby stopping the rotation of the brake drum.

Description

[0001] DESCRIPTION [0002] Apparatus for preventing reverse rotation of an escalator [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking device for an escalator, and more particularly, to a device for preventing the occurrence of a safety accident by stopping the rotation shaft when the rotating shaft for moving the step of the escalator is reversely rotated to be.

An escalator is a step-like device that allows a person or cargo to automatically move up and down the floor. The escalator is a means of transporting a large number of people or cargo at the same time as the stairs ascend or descend along the slope. Such escalators are widely used in public transportation facilities and public facilities such as subways and department stores.

A typical escalator moves the electric chain through a rotary shaft rotated by a driving motor, and sequentially moves a plurality of steps along an inclined surface to move up and down. An escalator can cause a backlash due to mechanical or electronic faults or malfunctions during ascending or descending, as a large number of people ride at one time and operate a lot of time. Especially, in the case of escalators installed in the subway history, which was started to be constructed since 1970, backward movement due to the breakage of the main shaft of the reducer and the breakage of the motor shaft are often occurred due to accumulation of fatigue of the escalator due to aging. If a malfunction causes the escalator to reverse, the recoil may cause the passengers to fall over, which could cause many passengers to fall off the escalator and lead to a major accident.

In order to prevent such a problem, an escalator having various braking devices capable of preventing the escalator from reversing is installed.

However, escalators installed long ago, such as escalators installed in the subway history, are often not equipped with an escalator anti-reverse mechanism. Therefore, a method of adding an anti-reverse movement device to an escalator not provided with a conventional anti-reverse device has been researched. In the case of a conventional escalator, it is necessary to additionally install an anti-reverse movement device inside the escalator, but the installation space is narrow due to the rotation of the drive stairs. 1, since the inner space of the rotary shaft 30, which receives the power of the driving motor 10 and moves the driving stairs, has an area of up to 100 mm in the up and down direction and the left and right direction, Difficulties exist.

Disc brakes in which braking force is generated due to close contact between both surfaces of the disc is generally used as a braking device in escalators in general. However, since the disc brake requires a somewhat wide space, it can not be additionally installed in a narrow space of a conventional escalator. Drum Brake, which generates braking force by bringing semicircular friction linings in close contact on both sides, can not be installed because the drum can be installed only in the direction of the drive stairs. The braking device using a caliper can not install a pad having a sufficient size because the installation space is narrow and the braking force required when the escalator runs backward can not be secured. In order to solve the problem of the braking device due to the narrow space inside the escalator, an anti-reverse device using a solenoid brake has been devised and applied to an obsolete escalator. The solenoid brake has a structure for braking the escalator by inserting a pin into the groove of the sprocket using an electronic solenoid device. However, during the emergency braking due to the reverse run of the escalator, the pin was broken due to the braking shock, preventing the reverse movement.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus for preventing an escalator from being reversed by preventing a safety accident caused by an inverse running of an escalator by providing an excellent braking force provided inside the escalator do.

An apparatus for preventing an escalator from moving backward by a sprocket installed at both ends of a rotating shaft rotated by a power transmitted from a motor is a hollow drum type brake drum provided on an outer circumferential surface of a rotating shaft. A bracket fixed to the structure of the escalator; A rotating member hinged to the bracket and rotating; A plate that is formed to surround the outer circumferential surface of the brake drum and has both ends arranged in the same direction, one end coupled to the bracket and the other end coupled to the rotating member; A reverse rotation sensing unit sensing reverse rotation of the rotation shaft; And a brake driving unit for driving the rotary member when the reverse rotation of the rotary shaft is sensed by the reverse rotation sensing unit. As the brake driving unit is operated, the rotary member is rotated in a direction opposite to the rotating direction of the brake drum So that the plate further tightly surrounds the outer peripheral surface of the brake drum and is brought into close contact with the brake drum, thereby stopping the rotation of the brake drum and stopping the escalator.

Further, the apparatus for preventing the escalator from moving backward according to the present invention may further comprise a friction lining disposed between the brake drum and the plate.

Further, the brake drum may be formed by coupling a drum having two semicircular sections.

Also, the reverse rotation sensing unit may include a first proximity sensor located near the tooth of the sprocket located at one end of the rotary shaft, and a second proximity sensor located near the groove, It may be to sense rotation.

Further, the apparatus for preventing the escalator from moving backward according to the present invention comprises a spring located inside the brake drum and a steel ball connected to the outer end of the spring and exposed to the outside of the brake drum, so that the gap between the friction lining and the brake drum And an interval maintaining unit for maintaining the interval.

An escalator anti-reverse device according to the present invention is installed inside an escalator to provide an excellent braking force, thereby preventing a safety accident caused by an inverse running of the escalator.

Further, since it can be installed in a narrow space inside the rotary shaft, it is easy to add to a conventional escalator in which a disc brake or a drum brake can not be installed additionally.

In addition, since the brake drum is divided into two parts and then assembled, it is possible to install the brake drum on the outer circumferential surface of the rotary shaft without disassembling the rotary shaft unlike the disc brake or the drum brake.

1 is a configuration diagram showing an example of a conventional escalator.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an escalator,
Fig. 3 is a view showing an operation of an escalator anti-skid prevention device of Fig. 2; Fig.
Fig. 4 shows a reverse rotation detecting unit of the escalator anti-skid device of Fig. 2; Fig.
5 is an exploded perspective view of a brake drum according to an embodiment of the present invention.
6 is an enlarged view of a portion A in Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The terms and words used in the present specification are selected in consideration of the functions in the embodiments, and the meaning of the terms may vary depending on the intention or custom of the invention. Therefore, the terms used in the following embodiments are defined according to their definitions when they are specifically defined in this specification, and unless otherwise specified, they should be construed in a sense generally recognized by those skilled in the art.

An escalator anti-reverse apparatus according to the present invention is a device for preventing a step of an escalator moving by a sprocket installed at both ends of a rotary shaft from reversing by stopping a rotary shaft rotated by a power transmitted from a motor.

2 is a block diagram of an apparatus for preventing an escalator from being reversed according to an embodiment of the present invention.

2, the apparatus for preventing the escalator from being reversed includes a reverse rotation sensing unit 110, a brake drum 151, a brake unit 200, and a brake driving unit 130. As shown in FIG.

The reverse rotation sensing unit 110 is disposed around the sprocket located at one end of the rotary shaft 30 that receives the power of the driving motor 10 and moves the driving stairs 20, Sensor) and a second proximity sensor. The reverse rotation sensing unit 110 senses the reverse rotation of the rotation axis according to a signal measurement order of the first proximity sensor and the second proximity sensor. The rotary shaft 30 has sprockets for transmitting power to the chain connected to the drive stairs 20 at both ends thereof. The reverse rotation sensing unit 110 may determine the forward rotation and the reverse rotation of the rotary shaft 30 through the sensing sequence of the first proximity sensor and the second proximity sensor. Since the grooves and the teeth have different distances (distances) from the first proximity sensor and the second proximity sensor, the first proximity sensor and the second proximity sensor can distinguish the groove and the tooth. For example, if the sprocket teeth of the rotary shaft 30 are first sensed by the first proximity sensor and then sensed by the second proximity sensor, it is determined that the rotary shaft 30 is rotating forward. On the contrary, It can be determined that the rotation shaft 30 is rotating in the reverse direction if it is detected by the first proximity sensor. The reverse rotation sensing unit 110 will be further described with reference to FIG. 4, which will be described later.

The brake drum 151 is formed in a hollow cylindrical shape and is provided on the outer circumferential surface of the rotary shaft 30. The brake drum 151 may be formed by coupling two drums 1511 and 1512 having a semicircular cross section as shown in FIG. Since the two drums having a semicircular cross section are coupled outside the rotary shaft 30, the rotary shaft 30 can be installed without being disassembled, which simplifies the construction. The anti-reverse device according to the present invention can be additionally installed in an existing escalator not equipped with the anti-reverse device. However, since the internal space in which the braking device can be installed on the rotary shaft 30 of the existing escalator is very narrow, the brake drum must be able to be installed in the clearance space within 100 mm in the vertical direction with respect to the rotary shaft 30. Therefore, the outer diameter of the brake drum 151 should be designed to be less than 100 mm.

The brake unit 200 stops the rotation of the brake drum 151 by stopping the rotation of the brake drum 151. Specifically, the brake unit 200 of FIG. 2 is formed of a bracket 220, a rotating member 210, and a plate 152.

The bracket 220 is fixed to the structure F of the escalator. The bracket 220 is fixed to the structure F of the escalator so that the rotary member 210 to be described below is supported and rotated.

The rotary member 210 is hinged to the bracket 220 and rotated. The rotary member 210 shown in FIG. One end is hinged to the plate 152 to be described below, and the other end is formed with a long circular hole and hinged to the cylinder rod 136 of the hydraulic cylinder 135. Accordingly, when the hydraulic cylinder 135 applies a force to the rotary member 210 while performing linear motion, the rotary member 210 rotates.

The plate 152 is formed to surround the outer circumferential surface of the brake drum 151. Both ends of the plate 152 are arranged in the same direction so that one end is coupled to the fixed bracket 220 and the other end is coupled to the rotating rotary member 210. [ A friction lining 153 is disposed between the brake drum 151 and the plate 152. Conventional brakes use a hardened friction lining 53, while the friction lining according to the present invention can be made flexible by using a flexible friction lining 153. Further, the friction lining 153 can be designed to cover only 60% of the outer circumferential surface of the brake drum 151. The width of the plate 152 and the brake drum 151 may vary depending on the braking force of the escalator required.

The brake driving unit 130 stops the rotation of the brake drum 151 by driving the brake unit 200 when the reverse rotation sensing unit 110 senses the reverse rotation of the rotation shaft. The illustrated brake-driving unit 130 includes a controller 131, a hydraulic unit 132, an electric motor 133, a hydraulic pump 134, and a hydraulic cylinder 135. The controller 131 receives a signal and operates the hydraulic unit 132, the motor 133, the hydraulic pump 134, and the hydraulic cylinder 135 to operate the reverse rotation detecting unit 110 The cylinder rod 136 connected to the rotary member 210 exerts a force on the rotary member 210 to rotate the rotary member 210. The hydraulic force is shown in FIG. 2 as a power for rotating the rotating member 210 by applying a force to the rotating member 210, but mechanical force using a rack and a pinion, electric force using a solenoid, or the like may be utilized.

FIG. 3 is a view illustrating an operation of the escalator anti-reverse device according to the embodiment of the present invention.

3 is rotated in the clockwise direction and the reverse rotation sensing unit 110 senses the rotation of the rotary shaft 30, the reverse rotation sensing unit 110 transmits a signal to the controller unit 131, The electric motor 133, the hydraulic pump 134, and the hydraulic cylinder 135 in response to the detection signal.

When the hydraulic cylinder 135 is operated, the piston rod 136 of the hydraulic cylinder 135 is extended, and the rotary member 210 hinged to the long circular hole with the piston rod 136 is rotated counterclockwise. When the rotary member 210 is rotated in the counterclockwise direction, the plate 152 formed to surround the outer circumferential surface of the brake drum 151 further encloses the outer circumferential surface of the brake drum 151. In addition, the friction lining 153 disposed between the plate 152 and the brake drum 151 is brought into close contact with the brake drum 151. Accordingly, the rotation of the brake drum 151 is stopped, and the rotation of the rotary shaft 30 fixedly coupled to the brake drum 151 is also stopped, thereby stopping the escalator. The elevator anti-skid device according to the present invention operates as described above, and is installed inside the escalator to provide a superior braking force, thereby preventing a safety accident caused by the reverse movement of the escalator.

Fig. 4 shows a reverse rotation detecting unit of the escalator anti-reverse movement device of Fig.

4, the reverse rotation detecting unit 110 of the escalator anti-reverse device according to the embodiment of the present invention includes a pair of proximity sensors including a first proximity sensor 111 and a second proximity sensor 112, Sensor. The first proximity sensor 111 and the second proximity sensor 112 are sequentially positioned at a predetermined distance from the sprocket 31 located at the end of the rotary shaft and sense the rotation of the sprocket 31. The sprocket 31 has grooves and teeth, and the grooves and the teeth have different distances from the first proximity sensor 111 and the second proximity sensor 112 (spacing distance). Accordingly, the first proximity sensor 111 and the second proximity sensor 112 can separate the groove and the tooth. The reverse rotation sensing unit 110 senses the reverse rotation of the sprocket 31 through the sequence in which the first proximity sensor 111 and the second proximity sensor 112 sense any one of the groove or the tooth, can do. For example, if the first proximity sensor 111 senses the teeth first and then the second proximity sensor 112 senses the teeth, the sprocket 31 may sense that the sprocket 31 has undergone normal rotation. When the first proximity sensor 111 senses the teeth, the sprocket 31 senses that the sprocket 31 rotates reversely after the gear 112 senses the teeth first. Or a magnetic substance or the like that can be detected by the first proximity sensor 111 and the second proximity sensor 112 is attached to the sprocket 31 or the first proximity sensor 111 and the second proximity sensor 112 ) Can detect the reverse rotation and the forward rotation in the order in which they are sensed.

6 is an enlarged view of a portion A in Fig.

As shown in FIG. 6, the brake drum 151 according to the present invention may further include a gap maintaining portion 600 for maintaining an interval (air gap) with the friction lining 153. The gap maintaining part 600 may be composed of a spring 601 located inside the brake drum 151 and a steel ball 602 connected to the outer end of the spring 601 and partially exposed to the outside of the brake drum 151 . The steel ball 602 is partly or wholly exposed by the spring 602 to maintain the gap between the friction lining 153 and the brake drum 151. The gap maintaining unit 600 pushes the steel ball 602 out of the brake drum 151 by the pressure of the spring 602 during normal operation to prevent the friction lining 153 from contacting the brake drum 151 , And unnecessary wear due to interference between the friction lining (153) and the brake drum (151) is prevented. When the brake unit is operated, the interval maintaining unit 600 is pushed into the brake drum 151 by the friction lining 153 and the friction lining 153 and the brake drum 151 are brought into contact with each other. Therefore, the braking force is secured.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation and that those skilled in the art will recognize that various modifications and equivalent arrangements may be made therein. It will be possible. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

112: second proximity sensor 130: brake driver
131: controller unit 132: hydraulic unit
133: electric motor 134: hydraulic pump
135: cylinder 136: cylinder rod
151: brake drum 152: plate
153: Friction lining 400: Bolt
600: space maintaining portion 601: spring
602: Steel ball 200: Brake part
210: rotating body 220: bracket

Claims

An apparatus for preventing an escalator from being reversed by stopping a rotating shaft rotated by a power transmitted from a motor so as to prevent a step of an escalator moving by sprockets provided at both ends of the rotating shaft from reversing,
A reverse rotation sensing unit sensing reverse rotation of the rotation shaft;
A hollow cylindrical brake drum coupled to an outer circumferential surface of the rotary shaft and rotating together with the rotary shaft;
A brake unit for stopping the rotation shaft by stopping the brake drum;
And a brake driver for driving the brake unit when the reverse rotation of the rotation shaft is sensed by the reverse rotation sensing unit.
The brake unit
A bracket fixed to the structure of the escalator;
A rotating member hinged to the bracket and rotating;
Wherein the bracket includes a plate coupled to the rotary member, the plate having a first end coupled to the bracket and a second end coupled to the rotary member,
When the brake driving section drives the brake section, the rotating member is rotated in a direction opposite to the rotating direction of the brake drum so that the plate further tightly surrounds the outer circumferential surface of the brake drum and is brought into close contact with the brake drum, And stops the operation of the escalator.

The method according to claim 1,
Further comprising a friction lining disposed between the brake drum and the plate.

3. The method of claim 2,
Wherein the brake drum is formed by coupling a drum having two semi-circular cross-sections.

The method of claim 3,
Wherein the reverse rotation sensing unit includes a first proximity sensor located near the teeth of the sprocket located at one end of the rotary shaft and a second proximity sensor located close to the groove, Wherein the detecting means detects the backward movement of the escalator.

The method of claim 3,
And a gap holding unit which is composed of a spring located inside the brake drum and a steel ball connected to an outer end of the spring and exposed to the outside of the brake drum to maintain a gap between the friction lining and the brake drum. Backward movement prevention device.