WO2016093582A1

WO2016093582A1 - Device and method for preventing escalator from going in reverse

Info

Publication number: WO2016093582A1
Application number: PCT/KR2015/013349
Authority: WO
Inventors: 이호연
Original assignee: (주) 미주하이텍
Priority date: 2014-12-08
Filing date: 2015-12-08
Publication date: 2016-06-16
Also published as: KR101529869B1

Abstract

The present invention relates to a device and a method for preventing an escalator from going in reverse, the device being operated independently of a brake device such as a main brake or an emergency stop brake of the escalator and mechanically preventing the escalator from going in reverse even if a drive device or the brake device of the escalator is disabled due to a power outage or a systematic error of the escalator.

Description

Apparatus and method for preventing escalator running backward

The present invention relates to an apparatus and method for preventing escaping of an escalator. In particular, the present invention operates independently of a braking device such as a main brake or an emergency stop brake of an escalator. The present invention relates to an escalator's reverse run prevention device that prevents the reverse run of the escalator mechanically even if it becomes inoperative.

As is known, the escalator is connected to the drive motor driven by the electricity and the drive sprocket of the drive shaft is connected to the drive chain, the step sprocket rotated together while the drive shaft is rotated by the power of the drive motor is moved on the inclined surface It is to move the passenger or object on the escalator's step. Basically, the escalator is equipped with a main brake on the driving motor itself, so that the escalator can be stopped if necessary, and the escalator can be braked rapidly when a safety accident such as a stenosis accident occurs. It is.

The safety accident that can cause the biggest human accident in such escalator is the accident that the passengers who ride in the upward direction are reversed while traveling in the downward direction and reversely run in the downward direction, and various braking devices and control methods are provided to prevent such safety accidents. And the like, and a representative example thereof is Republic of Korea Patent Publication No. 10-0995059 (name of the invention: emergency stop safety brake control device of the escalator; hereinafter referred to as 'quotation invention').

As shown in FIG. 1, the cited invention applies a power to a drive motor 21 of an escalator and operates a main brake built in the drive motor 21; A reverse rotation detection sensor detecting a rotation direction of the escalator rotation shaft 30 which is rotated in association with the output shaft of the driving motor 21; An overspeed sensor for sensing a rotational speed of the escalator rotation shaft 30; An emergency stop safety brake 40 for blocking rotation of the escalator rotation shaft 30 with a mechanical force; A controller for determining whether an abnormality is generated according to the signals of the reverse rotation sensor and the speed detecting sensor and sending a signal to the main control panel or a signal to a relay panel for applying power to the emergency stop safety brake 40. In the emergency stop safety brake control device of the escalator, the emergency stop safety brake 40 is provided on both sides of the brake disc 41 and the brake disc 41 which are additionally provided at one end of the escalator rotation shaft 30. At the same time applying a pressure to block the rotation of the brake disc 41 and includes an electric caliper 42 operated by a power applied by the relay board, the electric caliper 42 of the brake disc 41 A pair is provided on both sides of the lower end to be symmetrical to each other, the emergency stop safety brake 40, the escalator rotation shaft 30 Is installed on the drive shaft 35, the drive motor 21 is further installed on the outside of the opposite sprocket 36 is not connected, the falling speed of the escalator detected by the speed sensor is the primary speed limit When the speed exceeds 120%, the main brake is operated by cutting off the power supply to the driving motor 21 by sending a cutoff signal to the safety circuit of the main control board, and the reverse rotation is detected by the reverse rotation detection sensor or the overspeed detection sensor. It is an emergency stop safety brake control device of the escalator to operate the emergency stop safety brake 40 by operating the relay board when the falling speed of the escalator detected by the second speed exceeds 140% of the rated speed.

However, all known escalators that detect reverse rotation, including the cited invention, should be reversed in the upward direction and reversed in the downward direction so that the sensor can detect this to activate the main brake or the emergency stop safety brake. In the situation where the reverse rotation is already being performed, there is a serious problem that the occupant is overturned from the bottom of the escalator due to the nature of the escalator. As the emergency stop of the escalator accelerates downward and stops with a strong force, it is necessary to increase the unit cost of the main brake or the emergency stop safety brake, increase the weight, and increase the complexity of the braking structure. There is poor reliability of the braking problem.

Furthermore, since both the main brake and the emergency stop safety brake of the cited invention are powered by electricity, if the escalator is powered up in the up direction or shut off due to a malfunction, the vehicle will be stopped by the weight of the passenger on the escalator. There is a problem that the operation of stopping the escalator that is reversed and lowered cannot be performed at all.

The object of the present invention is to operate independently of the braking device such as the main brake or emergency stop brake of the escalator in order to solve this problem, the drive or braking device of the escalator is inoperable due to the power failure or system error of the escalator. It is to provide an apparatus and method for preventing the reverse running of the escalator to mechanically prevent the reverse running of the escalator.

The present invention provides a speed detecting unit for detecting a forward rotational speed of the sprocket of the escalator to achieve this object; A ratchet wheel fixed to the sprocket and integrally rotated with the sprocket and blocking a reverse rotation of the sprocket; A pawl stopping the ratchet wheel; If the forward rotation speed of the sprocket detected by the speed detector is greater than or equal to the set value, the pole is pulled and fixed. If the forward rotation speed is less than the set value, the pole is released and the forward rotation speed of the sprocket is less than or equal to the set value. A reverse anti-rotation portion for allowing the pole to actuate the ratchet wheel to always block reverse rotation of the sprocket in speed; It is to provide a reverse driving prevention device of the configured escalator.

In another aspect, the present invention provides a speed detection step of detecting the rotational speed of the sprocket of the escalator to rotate the forward direction using the apparatus for preventing the reverse running of the escalator,

A pole fixing step in which the anti-rotation prevention part separates the pole from the ratchet wheel and fixes it when the forward rotation speed of the sprocket detected in the speed detection step is equal to or greater than a set value;

When the forward rotation speed of the sprocket detected in the speed detection step is less than the set value, the pre-rotation prevention step of the reverse rotation for releasing the fixing of the pole fixed by the anti-rotation prevention portion so that the pole acts on the ratchet wheel that rotates integrally with the sprocket; ,

In the pre-preventing step of the reverse rotation, when the forward rotation speed of the sprocket is further decelerated below the set value and becomes zero speed, the pawl is fitted to the ratchet wheel and fixed in the reverse rotation direction of the ratchet wheel, and the forward rotation speed of the sprocket is less than the set value. Accelerating at the predetermined value provides a method for preventing the reverse run of the escalator is the pole lock step is performed.

In this way, the present invention is a pole for blocking the reverse rotation of the ratchet wheel for the reverse rotation of the sprocket is always operated in the speed range of the forward rotation speed of the sprocket is 0 to less than the set value, the forward rotation of the sprocket is raised escalator It is possible to block the reverse driving accident in which the escalator descends after being stopped and reversely rotated at all times before the reverse driving is performed, thereby improving the safety of the reverse driving of the escalator.

Furthermore, the present invention acts directly on the sprocket which raises and lowers the escalator's step chain to block the reverse rotation, so that the escalator is stopped before the escalator is reversed effectively, independently of the escalator's main brake or emergency stop brake, etc. Even if the brake or emergency stop brake fails or malfunctions, the escalator can be reversed.

In addition, the present invention stops the operation of the reverse rotation prevention portion for fixing the pole to the state away from the ratchet wheel in the event that the electricity supplied to the escalator is cut off or in a power outage, the pole is released to prevent the reverse rotation of the ratchet wheel at all times Because of this mechanical effect, there is always a very useful effect that can prevent the escalator from running backwards in the absence of electricity or other power.

1 is a perspective view showing the structure of the cited invention;

Figure 2 is a side view showing the overall configuration of a specific embodiment of the reverse running prevention apparatus of the escalator according to the present invention.

3 and 4 are explanatory diagrams explaining the operation of the escalator's reverse travel prevention device according to the present invention;

Figure 5 is a side perspective view specifically illustrating a reverse rotation prevention portion of the reverse driving prevention apparatus of the escalator according to the present invention.

Figure 6 is an explanatory view for explaining the operation of another embodiment of the reverse rotation prevention unit in the reverse driving prevention apparatus of the escalator according to the present invention.

7 and 8 are explanatory views for explaining the operation of another embodiment of the speed detection unit and the reverse rotation prevention unit in the reverse driving prevention apparatus of the escalator according to the present invention.

* Explanation of reference numerals

100: sprocket 110: drive shaft 120: step chain

200: ratchet wheel 210: pole 300: speed detection unit

320: detection protrusion 321: support protrusion 322: stopper

323: return unit 324: reverse rotation detection switch

330: Accelerator 340: Centrifugal switch 341: Centrifugal weight

400: reverse rotation prevention part 410: solenoid 420: elastic part

Best Mode for Carrying Out the Invention The speed detection unit detects a forward rotational speed at which the sprocket of the escalator rotates,

A ratchet wheel fixed to the sprocket and integrally rotated with the sprocket, for blocking a reverse rotation of the sprocket, a pawl for stopping the ratchet wheel,

If the forward rotation speed of the sprocket detected by the speed detector is greater than or equal to the set value, the pole is pulled and fixed. If the forward rotation speed is less than the set value, the pole is released and the forward rotation speed of the sprocket is less than or equal to the set value. It is an anti-back escalator of the escalator, which is configured with a reverse anti-rotation part for operating the pawl on the ratchet wheel to block the reverse rotation of the sprocket at all times.

With reference to the accompanying drawings, the present invention will be described in detail with reference to the embodiments of the present invention to be easily carried out by those skilled in the art as follows.

The overall configuration of a specific embodiment of the reverse driving prevention apparatus of the escalator according to the present invention is shown in Figure 2, the operation of the reverse driving prevention apparatus is shown in Figures 3 and 4.

As can be seen from the above, the apparatus for preventing the reverse run of the escalator according to the present invention includes a speed detecting unit 300 for detecting a forward rotational speed at which the sprocket 100 of the escalator rotates,

Is fixed to the sprocket 100 is rotated integrally with the sprocket 100, the ratchet wheel 200 to block the reverse rotation of the sprocket 100, the pawl 210 to stop the ratchet wheel 200,

If the forward rotation speed of the sprocket 100 detected by the speed detection unit 300 is greater than or equal to the set value, the pawl 210 is pulled and fixed, and if the forward rotation speed is less than the set value, the fixed state of the pole 210 is released. In order to prevent the reverse rotation of the sprocket 100 at a constant rotational speed of the sprocket 100 at a speed of 0 to less than a predetermined value, the reverse rotation preventing unit 400 operates the pole 210 on the ratchet wheel 200. Can be configured.

To explain this in more detail for each component, the ratchet wheel 200 and the pole 210 may be made of a metal, alloy or engineering plastic of high strength, the ratchet wheel 200 is a step chain of the escalator It can be configured to rotate integrally with the sprocket 100 for moving the 120, the pole 210 is made of a material different from the ratchet wheel 200 while having a high strength for minimizing noise, or pole 210 Noise prevention layer can be formed on the surface of the), the setting value of the forward rotation speed of the sprocket 100 is preferably set to the rotation speed value immediately before the stop of the sprocket 100.

In addition, the speed detection unit 300 may be configured as a rotary encoder or a Hall sensor that directly detects the rotational speed of the sprocket 100, it can detect and analyze the forward rotational speed of the sprocket 100 electronically in detail. Accordingly, by identifying the deceleration pattern or acceleration pattern characteristic for each escalator can be used as an indicator to determine whether there is an abnormality of the escalator, the speed detector 300 in the forward direction of the sprocket 100 to minimize the occurrence of failure or error It may be composed of a centrifugal force switch 340 that can physically switch the rotation speed set value.

For example, the speed detection unit 300 is a speed increase unit 330 for increasing and transmitting the rotational speed of the sprocket 100 and a centrifugal force for operating the switch by centrifugal force according to the rotational speed received from the speed increase unit 330. The switch 340 may be configured to transmit and adjust the speed ratio with respect to the rotational speed of the sprocket 100 in the speed increase unit 330, and the centrifugal force for which the contact point of the centrifugal force switch 340 falls may be determined. When the rotation speed of the sprocket 100 falls below the set value, the centrifugal force switch 340 is operated so that the hole acts in the direction of blocking the reverse rotation to the ratchet wheel 200 as the hole is released. Will be done.

In addition, the reverse rotation prevention unit 400, as illustrated in Figure 5, when the forward rotation speed of the sprocket 100 is greater than the set value by pulling the pole 210 is fixed and less than the set value to fix the pole 210 The solenoid 410 to release and the elastic portion 420 to be supported by the elastic force when the pole 210 is fixed so that the pole 210 is quickly acted on the ratchet wheel 200 when the pole 210 is released. The elastic portion 420 is an elastic force of the direction in which the pole 210 is pushed in the direction of the ratchet wheel 200 in the state in which the pole 210 is fixed to the solenoid 410, the sprocket Pulling the pole 210 in the direction of the solenoid 410 when the forward rotation speed of the 100 is more than the set value, the cam rotated by the motor for the operation of the elastic portion 420 is the elastic portion 420 Cam is provided on one side of the pole in the state that the pole 210 is fixed to the solenoid 410 Pushes the elastic portion 420, the ratchet wheel 200 direction, when the forward rotational speed of the sprocket 100 is greater than set value may serve to pull one side of the elastic portion 420. The

As shown in Figures 2 to 4, the apparatus for preventing the reverse run of the escalator according to the present invention can be configured in this way, the solenoid 410 of the reverse rotation preventing unit 400 during the forward operation of the escalator is raised to transport the passenger upwards. ) Secures the pole 210 in a state spaced apart from the ratchet wheel 200, so that the pole 210 does not collide with the ratchet wheel 200 which is rotated at a high speed, and thus no noise is generated, and the ratchet wheel 200 or the pole While the 210 is prevented from being worn or damaged, the speed detector 300 is always monitored by detecting the speed at which the sprocket 100 of the escalator rotates in the forward direction while being kept in a state that does not cause any trouble to the operation of the escalator. If the forward rotation speed of the sprocket 100 detected by the speed detection unit 300 is in the range of 0 speed to the set value speed range, the reverse rotation prevention unit 400 The fixed state of one pole 210 is released and the pole 210 is applied to the ratchet wheel 200 so that the reverse running of the ratchet wheel 200 is blocked in advance so that the reverse traveling of the sprocket 100 can be blocked. will be.

This is because the reverse rotation itself is blocked because the pole 210 is already caught by the ratchet wheel 200 when the escalator is reversely driven, that is, immediately before the escalator stops. In addition to stopping the escalator's reverse run with less deterrence than stopping the generated state, the reverse run itself is fundamentally blocked, so it is possible to prevent safety accidents such as the falling of passengers, which may occur even with a brief reverse run. It will be possible.

In addition, the reverse run prevention apparatus of the escalator according to the present invention can be configured to perform the functions of the speed detection unit 300 and the reverse rotation prevention unit 400 by a mechanical operation, without the use of electricity, specifically illustrated in FIG. As shown by 6, it is configured between the ratchet wheel 200 and the pawl 210, when the sprocket 100 is rotated in the forward direction to fix the pawl 210, and after the stop of the sprocket 100 reverse rotation When the reverse rotation of the ratchet wheel 200 is generated by the force to be activated by operating the reverse rotation detection switch 324 to inform the controller of the escalator driving risk, at the same time the detection projection 320 to release the pole 210 is released. Is configured, the detection projection 320, which may be formed of engineering plastics, etc. between the ratchet wheel 200 and the pole 210, while holding the pole 210 spaced apart from the ratchet wheel 200, the ratchet wheel ( 200) reversing foot When it is pushed by the force of the reverse rotation of the ratchet wheel 200, the support state of the detection projection 320 relative to the pole 210 is released to prevent the reverse rotation of the ratchet wheel 200 by the pole 210 When the sprocket 100 is normally operated again and rotates in the forward direction, the reverse rotational power disappears, and thus, the detection protrusion 320 is separated from the ratchet wheel 200 by the detection protrusion 320 again by the return unit 323. You can return to your seat.

In addition, as illustrated in FIGS. 7 and 8, the speed detecting unit 300 and the reverse rotation preventing unit 400 of the reverse driving prevention apparatus of the escalator according to the present invention are gears for transmitting power by increasing the rotational speed of the sprocket 100, The pole portion 210 is fixed while the centrifugal force 341 is opened by the speed increasing unit 330 configurable by a chain and the centrifugal force according to the rotational speed transmitted from the speed increasing unit 330, and the sprocket 100 is fixed. When the rotational speed is less than the zero speed or less than the set value, the ratchet wheel 200 is released to block the reverse rotation of the sprocket 100 by releasing the fixed pawl 210 as the centrifugal force applied to the centrifugal force shaft 341 decreases. ) May be configured as a centrifugal force switch 340 to allow the pole 210 to operate.

As described above, a method for preventing escalation of an escalator using an apparatus for preventing escalation of an escalator includes: a speed detecting step of the speed detecting unit 300 detecting a rotational speed at which the sprocket 100 of the escalator rotates in a forward direction;

A pole fixing step in which the anti-rotation prevention part 400 separates the pole 210 from the ratchet wheel 200 and fixes it when the forward rotation speed of the sprocket 100 detected in the speed detection step is equal to or greater than a set value;

When the forward rotation speed of the sprocket 100 detected in the speed detection step is less than the set value, the reverse rotation prevention unit 400 releases the fixing of the pawl 210 fixed to the pole 210 integrally with the sprocket 100. And to prevent the reverse rotation to act on the ratchet wheel 200 to rotate,

In the pre-preventing step of the reverse rotation, when the forward rotation speed of the sprocket 100 is further decelerated below the set value and becomes zero speed, the pole 210 is inserted into the ratchet wheel 200 to the reverse rotation direction of the ratchet wheel 200. When the rotational speed of the sprocket 100 is accelerated to less than the set value and becomes greater than or equal to the set value, the pawl 210 may be fixed.

Accordingly, in the present invention, the pole 210 which blocks the reverse rotation of the ratchet wheel 200 for blocking the reverse rotation of the sprocket 100 always has a forward rotation speed of the sprocket 100 in a speed range of 0 to less than a set value. When the forward movement of the sprocket 100, which is operated and the escalator rises, is stopped and then reversely rotated, the reverse driving accident in which the escalator descends can be blocked at all times before the reverse driving is performed, thereby improving the safety of the escalator's reverse driving, and the escalator Because it acts directly on the sprocket 100 for elevating the step chain 120, the reverse rotation is blocked, so it is independent of the escalator's main brake or emergency stop brake, and effectively stops the escalator before the escalator is reversed to effectively stop the escalator's main brake. Failure or malfunction of emergency stop brake Be inoperative as it is possible to block yeokjuhaeng of the escalator.

In the above description, the technical idea of the present invention has been described with reference to the accompanying drawings, but the present invention has been described by way of example only, and is not intended to limit the present invention. Anyone can make various modifications and imitations such as dimensions, shapes, structures, etc. without departing from the scope of the technical idea of the present invention. Such modifications and imitations are included in the scope of the technical idea of the present invention.

Claims

A speed detector for detecting a forward rotational speed at which the sprocket of the escalator rotates,

A ratchet wheel fixed to the sprocket and integrally rotated with the sprocket, for blocking a reverse rotation of the sprocket, a pawl for stopping the ratchet wheel,

If the forward rotation speed of the sprocket detected by the speed detector is greater than or equal to the set value, the pole is pulled and fixed. If the forward rotation speed is less than the set value, the pole is released and the forward rotation speed of the sprocket is less than or equal to the set value. Backlash prevention device of the escalator, characterized in that the reverse rotation prevention portion configured to operate the pole on the ratchet wheel to block the reverse rotation of the sprocket at all times.
The method of claim 1,

The reverse rotation prevention unit is configured between the ratchet wheel and the pole, and the sprocket is fixed to the pole when the forward rotation, pushed back when the reverse rotation of the ratchet wheel with the force of the reverse rotation after the stop of the sprocket reverse detection switch And a detection protrusion configured to release the pawls from the back of the escalator.
The method of claim 1,

The reverse rotation prevention part is a solenoid for fixing the pulley when the forward rotation speed of the sprocket is more than the set value, and release the lock of the pole if less than the set value, and when the pole is released by supporting the elastic force when the pole is released An anti-back escalator device, characterized in that the elastic portion is configured to be quickly acting on the ratchet wheel.
The method of claim 1,

The speed detecting unit and the anti-rotation preventing unit increase the rotational speed of the sprocket and transmit the power, and fix the pawl by centrifugal force according to the rotational speed transmitted from the speed increasing unit, but the rotational speed of the sprocket is set to 0 speed. And a centrifugal force switch for releasing the fixed pawl at a speed less than the value so that the pawl is actuated on the ratchet wheel to block reverse rotation of the sprocket.
A speed detecting step of detecting a rotational speed at which the speed detecting unit rotates in the forward direction of the sprocket of the escalator;

A pole fixing step in which the anti-rotation prevention part separates the pole from the ratchet wheel and fixes it when the forward rotation speed of the sprocket detected in the speed detection step is equal to or greater than a set value;

When the forward rotation speed of the sprocket detected in the speed detection step is less than the set value, the pre-rotation prevention step of the reverse rotation for releasing the fixing of the pole fixed by the anti-rotation prevention portion so that the pole acts on the ratchet wheel that rotates integrally with the sprocket; ,

In the pre-preventing step of the reverse rotation, when the forward rotation speed of the sprocket is further decelerated below the set value and becomes zero speed, the pawl is fitted to the ratchet wheel and fixed in the reverse rotation direction of the ratchet wheel, and the forward rotation speed of the sprocket is less than the set value. Accelerating at a predetermined value, the fall escalator characterized in that the pole lock step is carried out.