JP2000095468A - Drive for passenger conveyor and passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely start a passenger conveyor by preventing unexpected moving of the steps of a passenger conveyor while stopping. SOLUTION: This drive 9 for passenger conveyor for rotationally-moving a step chain 4 fitted with a plurality of steps 5 between two floors 2A and 2B by driving it, is provided with a ratchet wheel 16 and a latch 17 for restraining the movement of the step chain 4 lowering the steps 5 during stoppage of the passenger conveyor 1, and a controller transmitting a command for starting after confirming the release of constraints by the ratchet wheel 16 and the latch 17 by plural electric operations at the passenger conveyor 1 start. The ratchet wheel 16 and the latch 17 are connected directly to a reduction gear of the drive 9 and mounted on the opposite side to driving side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving apparatus for a passenger conveyor such as an escalator or a moving sidewalk which is installed at an angle between floors separated from each other, and a passenger conveyor using the same. The present invention relates to a driving device for a passenger conveyor that surely restrains movement of a step during stopping.

[0002]

2. Description of the Related Art Conventionally, an escalator, which is a kind of a passenger conveyor, drives a driving sprocket through a reduction gear by an electric motor, and drives a step chain wound around the driving sprocket and a driven sprocket that forms a pair with the driving sprocket. A plurality of steps connected to the step chain are moved, and when the operation of the passenger conveyor is stopped, a braking device provided in the driving device is operated to stop and hold the steps. However, in an installation mode in which the step must be used as an evacuation route when the step is stopped, evacuees concentrate on the step and exceed the holding limit of the braking device, or the failure of the braking device, etc. In some cases, accidents may occur in which the steps are suddenly lowered due to the operation failure of the vehicle and the evacuees fall. In order to prevent this problem, a restraining means for restraining the rotating portion of the driving device by mechanical engagement when the step is stopped is provided, for example, as disclosed in Japanese Patent Application Laid-Open Nos. 8-59161 and 8-337381. Have been.

[0003]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 8-591
The device disclosed in Japanese Patent Publication No. 61 is basically provided with a restraining means for restraining the rotation of a driving device which is a source for moving a step, and has a wide range of measures such as restraining, releasing, controlling, delaying and buffering the restraining means. Although the technology is disclosed, the reliability of the restraint and release operations among these is not sufficient, and for example, there is a concern that the driving device may be operated during the restraint to damage the restraint means.

On the other hand, in the apparatus disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 8-337381, a notch hole is provided in a brake wheel of a driving device, and after a stop of the escalator, for example, after 3 seconds, a rod is inserted into the notch hole. It performs mechanical locking. This technique technically belongs to the above-mentioned known example, and neither the solution nor the effect is beyond the range of the known example.

[0005] A first object of the present invention is to prevent unexpected movement of steps while the passenger conveyor is stopped, and to reliably start the passenger conveyor.

A second object of the present invention is to improve the reliability and safety of a passenger conveyor.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a main frame which is installed between floors of floors separated from each other up and down, by connecting the upper floor and the lower floor. In a passenger conveyor driving device for driving endless moving means for sequentially attaching a plurality of steps provided in an endless manner and sequentially carrying passengers, and rotating between the two floors, while the passenger conveyor is stopped, Constraining means for restraining the movement of the endless moving means, and control means for transmitting a start command after confirming the release of the restraint by the restraining means by a plurality of electrical operations at the start of activation of the passenger conveyor. It is to be prepared.

[0008] The driving device of the passenger conveyor is endless between the upper floor and the lower floor in a main frame which is installed between the floors of floors separated vertically, that is, one endless shape. , For example, a chain is driven to rotate between two floors. Since the endless moving means is provided with a plurality of steps successively adjoining passengers, when the endless moving means is driven by the driving device, the plurality of steps move up or down between the upper floor and the lower floor. Move and rotate. When the passenger conveyor is stopped, the restraining means restrains the movement of the endless moving means, so that the movement of the steps attached to the endless moving means is also restrained. Therefore, careless movement when the passenger conveyor attempts to descend or ascend for any reason is prevented.

Further, at the start of the start of the passenger conveyor, the control means confirms, by a plurality of electric operations, that is, a plurality of electric retries, that the restraint of the endless moving means by the restraining means has been released. After confirming that the restraint of the endless moving means has been released, a command for starting the passenger conveyor is transmitted only in a normal state. Therefore, there is no possibility that the driving device is operated and the restraining means is destroyed without the restraining of the endless moving means by the restraining means being released.

In the above-mentioned passenger conveyor, the restraining means restrains the movement of the endless moving means for lowering the steps so that, for example, when the passenger conveyor breaks down for some reason and stops, the steps are used as emergency stairs. Even if a passenger gets on, it is prevented from descending carelessly.
Since the mechanism is restricted only on the side where the steps descend, the structure is simplified and unnecessary restriction mechanisms and operations can be eliminated. Further, since the restraining means is directly connected to the speed reducer of the driving device, the movement of the endless moving means is reliably restrained even when the braking cannot be performed due to the failure of the electromagnetic disc brake or the like. The restraining means is provided on the side of the driving device opposite to the driving side. For example, since it is provided in a space in the upper machine room where a maintenance worker can easily check, a large work space can be secured, and operations such as maintenance and inspection can be facilitated.

Further, a passenger conveyor using any one of the passenger conveyor driving devices described above can improve the reliability and safety of the passenger conveyor.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a passenger conveyor driving device and a passenger conveyor according to the present invention will be described below in detail with reference to the drawings. In FIGS. 1 to 6, the same mechanisms and working parts are denoted by the same reference numerals.

FIG. 1 is a schematic side view showing an embodiment of a passenger conveyor driving device according to the present invention together with the entire passenger conveyor. The passenger conveyor 1 of the present embodiment shows an escalator, and is installed to be inclined between an upper floor (upper floor) 2A and a lower floor (lower floor) 2B which are vertically separated. A plurality of steps 5 connected endlessly by a step chain 4 as endless moving means are guided in the main frame 3 to be moved and rotated. The steps 5 are guided by guide rails (not shown) supported by the main frame 3.

The step chain 4 is composed of a drive sprocket 6 pivotally supported in an upper machine room 1A formed at both ends of the main frame 3.
And driven sprocket 7 which is supported in lower machine room 1B
It is wound around and driven.

The driving sprocket 6 has a driven sprocket (not shown) fixed coaxially, and the driving chain 8 is wound around the driven sprocket to transmit the torque of a driving device 9 having an electric motor 13. A braking device 10 (shown in FIG. 3) which applies a braking force to the rotating shaft, for example, generates a braking force by a spring force such as an electromagnetic disc brake, and releases the braking force by an electromagnetic force by feeding power to the coil. Is provided.

A balustrade 11 is erected on both sides of the endless step 5 along the direction of movement and rotation of the step 5, and a handrail 12 driven in synchronization with the step 5 is supported on the periphery thereof.

The above configuration is a standard escalator configuration, but the mechanical feature of this embodiment is that the driving device 9
Is provided with restraining means for restraining the rotating portion of the step 5 only on the side where the step 5 descends by engagement with the fixed portion.

FIG. 2 is a side view of a main part of the driving device of FIG. FIG. 3 is a plan view of FIG. As shown in FIGS. 2 and 3, a ratchet 16 is provided on a rotary shaft 14C coaxial with an input shaft 14A of a speed reducer 14 (a known example is an electric motor), and a fixed portion facing the ratchet 16, for example, in this embodiment, Assuming that the brake device 10 becomes inoperable by engaging the ratchet wheel 16 and the latch 17 when the step 5 is stopped when the latch 5 is stopped and provided on the reduction gear box. Also, the step 5 can be stopped and held. Here, the ratchet wheel 16 is located on the side opposite to the drive chain 8,
A plurality of (four in the illustrated example) claw portions 1 on the outer peripheral portion thereof
6A, the claw portion 16A is formed in a convex shape so as to engage with the side where the step 5 descends, and the claw portion 16A and the latch 17 engage. It has a windmill-like outer shape that spins without engaging.

The latch 17 is formed in a substantially J-shape.
An engagement portion 17A that engages with the claw portion 16A of the ratchet wheel 16 is formed at one end of the J-shape, and the other end 17B of the J-shape is connected to the support shaft 18.
Thereby, it is rotatably supported by the box of the speed reducer 14. Further, the other end portion 17B is connected to an electromagnetic drive device 19 which is means for operating the latch 17. This electromagnetic drive 1
Reference numeral 9 denotes a coil (not shown) that is fixed to a box of the speed reducer 14 and generates a magnetic force by supplying electric power, a plunger 19A driven by the generation of the magnetic force, and returns the driven plunger 19A to its original position. A return spring (not shown), and the free end of the plunger 19A is connected to the other end 1 of the latch.
7B. The return spring is provided with a latch 17.
The coil generates a pressing force so that the engaging portion 17A of the hook is always engaged with the claw portion 16A of the ratchet wheel.
A magnetic force for driving the plunger 19A is generated in a direction in which the engagement with the 6A is released. Further, the detection switch 20 is fixed to the box of the speed reducer 14 via the pedestal 20A, and is provided between the engaging portion 17A of the latch 17 and the support shaft 18.

In the above mechanism, when the passenger conveyor 1 is stopped, the power supply of the electric motor 13 is shut off.
The electric motor 13 is restrained by the braking device 10 via the input shaft 14A of the speed reducer 14, and each step 5 is also stopped via the drive chain 8 and the step chain 4 not shown. As described above, when the step 5 is stopped and held by the braking device 10, at the same time, the latch 17 is also engaged with the claw portion 16 </ b> A by the pressing force of the return spring in the electromagnetic drive device 19. For this reason, even if a large number of passengers exceeding the stop holding ability of the braking device 10 enter, or a large number of passengers or pedestrians enter when the braking device 10 breaks down and loses the stop holding capability during a stop, the vehicle is decelerated. Machine 14
The step 5 does not move in the descending direction because the rotary shaft 14C is restrained by the latch 17.

Next, the features of the present embodiment are as follows: 1) The point that the restraining means is effective only on the descending side of the step 5. In the inclined-type passenger conveyor, when the brake device is abnormal, the step 5 is moved in the direction of gravity. Moving only to the descending side, and having the restraining ability also on the ascending side can be said to be excessive performance, rather lowering reliability.

2) Point that the restraining means is located on the space side opposite to the drive chain 8 The restraining means of the present embodiment is not located at the narrow connection between the electric motor and the speed reducer, but at the opposite side of the drive chain 8. It is provided on the space side of the upper machine room 1A. This is convenient for maintenance and inspection and consequently improves reliability.

3) Providing the restraining means on the reduction gear 14 When the restraining means is directly connected to the rotating shaft of the electric motor, when an abnormality occurs in the coupling, which is the connecting portion between the electric motor and the reduction gear, the restraining ability is exhibited. I can't. The reason is step 5
Is merely connected to the speed reducer 14, and since the stop and hold of the speed reducer 14 is a prerequisite for the stop and hold of the steps 5, the restraining means is directly connected to the speed reducer 14 to greatly improve the reliability.

2 and 3, the rotational torque of the electric motor is transmitted from the rotary shaft 13A of the electric motor to the pulley 13B, and further transmitted through the V-belt 13C to the input shaft 1 of the speed reducer.
4A. The rotational torque from the output shaft 14B of the speed reducer is transmitted from the sprocket 15 via the drive chain 8 to the drive sprocket 6 of the step chain.

The control features of the present embodiment are as shown in FIGS.

FIG. 4 is a conceptual diagram of a control system of the driving device of FIG. FIG. 5 is a control operation flowchart at the start of activation of the drive device of FIG. In the stopped state of the step 5 (FIG. 1), as shown in FIG. 5, when a start start command for starting operation is issued in step S1, the coil of the electromagnetic drive device 19 is energized in step S2 via the control device 21. This generates a magnetic force. In step S3, the plunger 19A is pressed against the return force of the return spring, and the pressing of the plunger 19A causes the other end portion 17B of the latch 17 to rotate around the support shaft 18 in the counterclockwise direction in FIG. 1
7A is pulled away from the outer periphery of the ratchet wheel 16 to release the engagement. When the plunger 19A operates normally and rotates to a position where the engagement portion 17A and the claw portion 16A are disengaged, the latch 1
When the detection switch 20 in contact with 7 is operated, the operation of the detection switch 20 supplies power to the braking device 10 to release the braking force, and also activates the electric motor 13 to move the step 5 in a desired direction.

Here, even if the command S3 for releasing the engagement is given as described above, if the latch 17 is biting into the claw portion 16A or is in a tight contact with the support shaft 18 and cannot be released, If the detection switch 20 erroneously sends the release detection signal to start the electric motor 13, the restraint may be damaged. For this reason, in the present embodiment, step S
In step 4, a plurality of electrical operations are performed by the detection switch 20 to determine the presence or absence of disengagement, that is, retry is performed a plurality of times by an electric circuit command. When YES is determined, a start permission command is issued in step S5. When the determination is NO, a command to disable the start is issued in step S6, the failure is treated, and the maintenance person inspects. The retry function for a plurality of times can greatly contribute to improving the reliability of the engagement system and the detection system, which are important mechanisms.

FIG. 6 is a control operation flow chart when the operation of the driving device of FIG. 1 is stopped. When stopping the passenger conveyor 1, as shown in FIG. 4 and FIG.
When the operation stop command is given in step S12, the motor 13 starts to decelerate via the control device 21.
3 stops or immediately before the stop, stops the energization of the braking device 10 to apply a braking force, and stops and holds the rotation of the driving device 9.
In step S13, it is checked whether or not the braking device 10 has been stopped by another electric means at the same time as the application of the braking force, in other words, simultaneously with the stop of the power supply to the braking device 10.
If not stopped in step 3, the excitation of the coil of the electromagnetic drive device 19 is continued in step S14. Only when the stop is confirmed in step S13, the coil loses its magnetic force due to the demagnetization of the coil of the electromagnetic drive device 19 in step S15. When the coil of the electromagnetic drive device 19 is demagnetized, the restraining means is activated and the plunger 19A is attracted in step S16, and the plunger 19A reduces the effect of the return spring in the electromagnetic drive device 19 and causes the latch 17 to engage with the ratchet wheel. 16 to restrict the rotation of the rotation shaft 14C (FIG. 3) of the reduction gear.
In this case, the restraint can be ensured by continuing the excitation of the coil when the stop is incomplete,
It can contribute to the improvement of the overall reliability.

If the latch 17 is operated in a state where the operation is not completely stopped, the restraint means and other parts may be damaged. Therefore, after the brake device 10 is operated, the brake device 10 is restrained after a certain time (several seconds). It is also possible to add a delay means and a damper function. Further, the above is the description of the escalator, but it is needless to say that the present invention can be applied to an inclined moving sidewalk.

[0030]

According to the passenger conveyor driving device of the present invention, it is possible to prevent unexpected movement of the steps while the passenger conveyor is stopped, and to reliably start the passenger conveyor.

Further, according to the passenger conveyor of the present invention, the reliability and safety of the passenger conveyor can be improved by using the driving device of the passenger conveyor.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an embodiment of a passenger conveyor driving device according to the present invention together with an entire passenger conveyor.

FIG. 2 is a side view of a main part of the driving device of FIG.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a conceptual diagram of a control system of the drive device of FIG.

FIG. 5 is a control operation flowchart at the start of activation of the drive device of FIG. 1;

FIG. 6 is a control operation flowchart when the operation of the drive device of FIG. 1 is stopped.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Passenger conveyor 2A Upper floor (upper floor) 2B Lower floor (lower floor) 3 Main frame 4 Step chain (endless moving means) 5 Step 9 Drive 9A Drive side 9B Opposite side 14 Reduction gear 16 Claw wheel (restraining means) 17 Latch (restraining means) 18 Support shaft (restraining means) 20 Detection switch (control means) 21 Control device (control means)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhei Kojima 1070 Ma, Hitachinaka City, Ibaraki Prefecture Inside the Mito Plant of Hitachi, Ltd. No. 4 Inside Tokai Passenger Railway Co., Ltd. (72) Inventor Toshio Yokonishi 1-4-1, Meieki, Nakamura-ku, Nagoya City, Aichi Prefecture Inside Tokai Passenger Railway Co., Ltd. (72) Inventor Masayuki Sojo Nakamura-ku, Nagoya City, Aichi Prefecture F-Term (reference) 3F321 AA04 CA17 CA20 in Tokai Passenger Railway Co., Ltd. 1-4 1-4 Meieki Station

Claims (5)

[Claims] 1. A step which is provided endlessly between an upper floor and a lower floor and which is endlessly provided between floors of floors vertically separated from each other and on which floors for carrying passengers are sequentially adjacent to each other. In a passenger conveyor driving device for driving a plurality of endless moving means to rotate and move between the two floors, a restraining means for restraining the movement of the endless moving means while the passenger conveyor is stopped, A driving device for a passenger conveyor, comprising: control means for transmitting a start command after confirming the release of the restraint by the restraining means by a plurality of electrical operations at the start of activation of the passenger conveyor. 2. The passenger conveyor driving device according to claim 1, wherein the restraining means restrains the movement of the endless moving means for lowering the step. 3. The passenger conveyor driving device according to claim 1, wherein the restraining means is directly connected to a speed reducer of the driving device. 4. The method according to claim 1, wherein
The driving device for a passenger conveyor, wherein the restraining means is provided on a side opposite to a driving side of the driving device. 5. A passenger conveyor using the passenger conveyor drive device according to claim 1.