JP3497316B2 - Man conveyor - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an escalator,
The present invention relates to a man conveyer such as an auto load, and particularly relates to a man conveyer suitable for automatically detecting a defect that occurs in the man conveyer, safety of passengers, and prevention of damage to equipment.

[0002]

2. Description of the Related Art In a passenger conveyor of this type, as an apparatus for automatically detecting a running defect of a step and a handrail, there is, for example, one disclosed in Japanese Patent Publication No. 7-12903. For example, FIG.
It is a block diagram which shows the structure of the man conveyor shown by 2903 publication, and FIG. 5 is a detailed view which shows the detailed structure of the drive part of a handrail. In the figure, 1 is an endless step belt of a passenger conveyor, 2 is a handrail, and a step belt 1
Is constructed by continuously mounting steps 6 on a pair of left and right endless chains 5 wound around an upper sprocket 3 and a lower sprocket 4. Reference numeral 7 is a guide rail of the endless step belt 1. The upper sprocket 3 is a step belt driving wheel 1 which is rotationally driven by a driving machine 8 through a chain 9.
0 is integrally attached to this step belt drive wheel 1
By the low speed driving of 0, the endless step belt 1 is fed and driven at a constant speed.

On the other hand, the handrails 2 provided on both sides of the endless step belt 1 are guided by the guide roller group 11 and tension of the handrails 2 causes the handrail drive wheels 1 to move.
The handrail drive wheel 12 is frictionally contacted with the handrail drive wheel 12, and a driving force is given to the drive wheel 12 for feeding. The handrail drive wheel 12 includes a sprocket 13 and a step belt drive wheel 1 integrally attached to the handrail drive wheel 12.
Driving force is applied from the step belt driving wheel 10 through the handrail driving sprocket 14 integrally attached to the 0 and the handrail driving chain 15 wound around the sprocket 14. The step belt 1 is fed and driven in synchronization with the movement of the step belt 1.

On the other hand, the speed detecting portions of the steps 6 and the handrail 2 are constructed as shown in FIG. 2, and the step speed detecting means 16 using a tacho generator (speed generator) or the like is used.
The handrail speed detecting means 17 using a tacho generator (speed generator) or the like detects the speed of the handrail 2 by detecting the speed of the step 6.

In the passenger conveyor as described above, the handrail caused by the slip of the handrail drive wheel 12 is based on the difference between the step and handrail speed information from the step speed detecting means 16 and the handrail speed detecting means 17. An unsynchronization between the speed and the step speed is detected, and when these factors occur, the passenger conveyor is stopped to prevent an accident due to the unsynchronization of the handrail speed and the step speed.

[0006]

According to the above-mentioned method, the handrail drive wheels 12 are driven based on the speed difference detected by the step speed detecting means 16 and the handrail speed detecting means 17 during the operation of the man conveyor. Although it was possible to detect the non-synchronization of the steps and the handrail traveling based on slip etc., the detection based on the speed difference can be seen only immediately after the operation of the man conveyor is stopped or just after it is stopped. It was not possible to detect equipment malfunctions such as sticking of the brake lining and decrease of brake torque. Further, when the passenger conveyor is stopped, the movement of the steps and the handrail due to the decrease of the brake torque or the like is not detected, and there is no means for detecting the malfunction of the device.

In the conventional inspection of the sticking of the brake in which the brake lining of the passenger conveyor sticks to the disc pad, the maintenance worker inspects, for example, each part of the operator's conveyor which is stopped and cannot be operated, It was not possible to detect the clinging of the brake lining for the first time when the inspection was performed, and the work efficiency of the maintenance inspection was poor. In addition, the brake torque is checked by measuring the stopping distance of the man-conveyor at every predetermined periodic inspection time, and no problem occurs in normal use, but by any chance, due to some reason. When the brake torque suddenly decreases and passengers get in even when the passenger conveyor is stopped, the steps may start to move due to the weight of the passengers, which may lead to a serious accident.

The present invention has been made to solve the above-mentioned problems, and a first object of the present invention is to obtain a passenger conveyor which can easily detect clinging of the lining of a brake that causes inoperability. That is. A second object is to obtain a man conveyer that can reliably detect an abnormality of a device that hinders the operation of the man conveyer. A third object is to obtain a passenger conveyor that can detect a decrease in brake torque easily and can be operated safely. A fourth object is to obtain a passenger conveyor that can ensure the safety of passengers even when the passenger conveyor is placed while the operation is stopped. Further, a fifth object is to obtain a passenger conveyor that can meet various specifications.

[0009]

A passenger conveyor according to the present invention detects steps arranged in an endless manner, an endless handrail traveling in the same direction as the steps, and a moving speed of the handrail. The handrail speed detecting means, the step speed detecting means for detecting the moving speed of the step, and the speed of the step or handrail detected by the step speed detecting means or the handrail speed detecting means at the start of operation. Once elapsed the first predetermined time required <br/> to reach a predetermined speed to a normal startup after receiving the operation command of the footstep and handrail, upon detecting a value that does not reach the predetermined first reference speed , And a control means for determining an abnormality and outputting an operation stop.

Further, the operation key of the reset device for restarting after a command to stop or emergency stop operation by the control device, the automatic reset mode allows the restart by the operation of the operation key in the field or in the field, It is possible to select either the manual reset mode in which the restart is impossible only by the operation of.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. Hereinafter, an embodiment of the present invention will be described. FIG. 1 is a system configuration diagram of a passenger conveyor control device according to the present invention. In the figure, reference numeral 16 is a tacho generator (speed generator), pulse oscillator, etc., and a step speed detecting device for detecting the speed of the step 6, 17 is a tacho generator (speed generator), pulse oscillator, etc. , Handrail speed detection device for detecting the speed of the handrail 2, 1
Reference numeral 8 is a driving signal generating means for judging whether the passenger conveyor is in operation or stopped and transmitting the judgment result (ON / OFF signal), 19 is a small computer such as a microcomputer as a control means, 2
Reference numeral 0 is an alarm means such as an automatic announcement to passengers or an alarm buzzer to the manager's room, 21 is a command relay for stopping the passenger conveyor, and 22 is a contact of the relay.

Here, the small-sized computer 19 is a random access memory (R
AM) 191, a clock oscillator 192, a read-only memory (ROM) 193 storing a control program, an arithmetic unit 194 for executing a predetermined process by executing the control program in the ROM 193 in synchronization with the clock oscillator 192, and this arithmetic unit The output register 19 temporarily holds the output of 194 and is connected to the alarm means 20 and the command relay 21.
It is composed of 5.

Next, the operation of the embodiment of the present invention will be described with reference to the flowchart showing the flow of the processing performed by the small computer 19 in FIG. When the passenger conveyor is in a stopped state, the operation signal generation means 18 determines that it is stopped, and an OFF signal is input to the small-sized computer 19.
On the other hand, when the operation of the passenger conveyor is started, the signal from the operation signal generating means 18 changes from OFF to ON (step S1). When the calculation unit 194 detects the ON signal from the operation signal generation unit 18, the calculation unit 194 proceeds to step S2 and performs initialization such as clearing each variable and reading a program from the ROM 193.

In step S3, when a change in the signal from the operation signal generating means 18 from OFF to ON is detected, time measurement is started based on the clock signal from the clock oscillator 192, and the process proceeds to step S4. To do.

In step S4, the step speed detecting device 16
Also, based on the speed information input from the handrail speed detection device 17 to the RAM 191, the detected step speed VS and handrail speed VH are the stall detection set speed during normal operation of the steps and handrail speed detection device. As described above, it is determined whether or not the speed has reached the speed V1 (for example, about 30% of the rated speed (30 m / min)) which is the first reference speed determined in advance. Here, VS ≧ V1 and VH
If ≧ V1 is determined, it is determined that the engine is normally started, the process proceeds to step S6, the time measurement performed in step S3 is ended, and the normal operation state is set.

On the other hand, if it is determined that VS≤V1 or VH≤V1, the process proceeds to step S5 and step S3.
The elapsed time t from the ON of the driving signal, which has been measured by, is preset, and the time t1 corresponding to the minimum first predetermined time required for the step and handrail speed to rise to V1 at the time of normal startup (for example, , About 1s)
If it is smaller than this, the process returns to step S4, and the speed determination is performed again. However, when t ≧ t1 here, the speed of the step or the handrail does not reach V1 even though the time t1 has been reached, because the start resistance increases due to sticking of the brake lining or the handrail There is a possibility that a malfunction such as a slip of the drive unit may occur. Therefore, the process proceeds to step S8, the operation stop output is performed, and the man conveyor is stopped.

When the detected step speed VS reaches the predetermined speed V1 or higher but the handrail speed VH does not reach the speed V1, a slip problem of the handrail drive unit occurs. Can be predicted. on the other hand,
When the detected step speed VS does not reach the predetermined speed V1 or higher and the handrail speed VH reaches the speed V1, it is possible to predict a malfunction of the chain connecting the steps.

As a result of the operation stop output in step S8, the passenger conveyor should normally stop. After performing the operation stop output, by step S9,
After counting for a fixed time (for example, about 0.5 s), the state of the driving signal from the driving signal generating means 18 is determined in step S10. If the operation signal is OFF, it is determined that the operation has been stopped normally, the process proceeds to step S12 and waits until recovery.

However, if the operation signal remains ON, a failure of the operation stop output relay or operation signal generating means 18
Since it is predicted that a failure etc. has occurred, step S
By shifting to 11 and turning off the emergency stop relay, the man conveyor is brought to an emergency stop, and the man conveyor is made to stand by until the trouble that has occurred is investigated and dealt with. At that time, at the same time when the man conveyor is stopped, a buzzer or the like may notify the manager, or an auto announcement or the like may notify the passengers.

According to this embodiment, the step speed detecting device 1
Step speed information from 6 and handrail speed detection device 17
The handrail speed information from the computer and the operation status information from the operation signal generating means are sequentially input to the RAM 191 in the small computer 19, the arithmetic unit 194 executes the control program stored in the ROM 193, and the speed input to the RAM 191. Based on the information, the small computer 19 can detect the sticking of the lining of the brake, which is conventionally detected by the operator during the inspection, at the time of starting the operation,
Equipment defects can be detected early and the workability of maintenance and inspection is improved.

Embodiment 2. In the second embodiment, the operation during the passenger conveyor operation in the normal state (the operation after the time measurement is stopped in step S6) will be described. The operation signal is ON while the operation of the passenger conveyor is started and is in the normal operation state. During this time, small computer 19
In the calculation unit 194 therein, step S7 has been entered, and the step speed VS and the handrail speed VH are preset based on the speed information input to the RAM 191 from the step speed detection device 16 and the handrail speed detection device 17. Lower limit speed V2 that is the predetermined second reference speed (for example,
20 to 25% of the rated speed (30 m / min) and the upper limit speed V3 that is the third reference speed (for example, the rated speed (30 m
/ Min) of about 120%).

Here, V3 ≧ VS ≧ V2 and V3 ≧ V
If H ≧ V2, it is determined that there is no abnormality, and the determination in step 7 is repeated. However, if the step speed VS becomes V2 or less, the step drive chain is broken, the drive motor power cannot be transmitted due to the slip or break of the drive belt of the drive motor, and the torque of the drive motor is lost due to overload (passenger overriding). There is a possibility that a trouble such as a trouble of the drive motor may occur. On the other hand, when the step speed VS becomes V3 or more, overload at the time of descending operation and acceleration of the step due to torque loss of the drive motor are considered. Then, the processing in step S8 and subsequent steps described above is performed.

If the handrail speed VH becomes V2 or less, there is a possibility that troubles such as a failure of the speed detecting device, a slip between the handrail and the driving roller, and a trouble of the handrail driving device may occur. Then, the process proceeds to S8, and the processes in and after step S8 described above are performed.

In step S7, VH / VS, which is the ratio of the handrail speed VH and the step speed VS, is calculated, and the value is within a certain range (for example, 0.25≤VH /
It may be determined whether VS ≦ 1.2), and the same determination as described above may be performed depending on whether it is within a certain range.
VH, which is the ratio of handrail speed VH to step speed VS
By determining / VS, it is possible to accurately detect the non-synchronization of the movements of the handrail and the steps, so that the safety of the passenger conveyor can be ensured and the malfunction of the control device can be reduced.

According to this embodiment, the step speed detecting device 1
Step speed information from 6 and handrail speed detection device 17
Handrail speed information from the R in the small computer 19
The data is sequentially input to the AM 191 and the arithmetic unit 194 stores the ROM 1
The control program stored in 93 is executed, and the RAM 19
Based on the speed information input in 1, the drive motor power cannot be transmitted due to the break of the step drive chain, the slip or break of the drive belt of the drive motor, the torque loss of the drive motor due to overload (passenger overriding), Detecting problems such as drive motor trouble, overload during down operation, step acceleration due to drive motor torque loss, speed detection device failure, slip between handrail and drive roller, handrail drive device trouble, etc. Therefore, the workability of maintenance and inspection is improved, and the safety of the passenger conveyor can be secured.

Embodiment 3. Next, the operation of the embodiment of the present invention will be described with reference to the flowchart showing the flow of processing performed by the small computer 19 in FIG. When the passenger conveyor is in the normal operation, the operation signal generating means 18 determines that the operation is in progress, and
The N signal is input to the small computer 19. On the other hand, when the operation of the passenger conveyor is stopped, the operation signal generating means 1
The signal from 8 changes from ON to OFF (step S
13). The calculation unit 194 uses the O signal from the operation signal generation means 18.
When the FF signal is detected, the process proceeds to step S14,
Time measurement is started based on the clock signal from the clock oscillator 192, and the process proceeds to step S15.

In step S15, the step speed detecting device 1
6 and the handrail speed detection device 17 to the RAM 191
Based on the speed information input to, the detected step speed VS and handrail speed VH are speed V4 (for example, a value close to 0) which is a preset fourth reference speed.
It is determined whether or not the following. Here, if it is determined that VS ≦ V4 and VH ≦ V4, it is determined that the vehicle is normally stopped, the process proceeds to step S16, the time measurement performed in step S14 ends, and the system is stopped.

On the other hand, if it is determined that VS ≧ V4 or VH ≧ V4, the process proceeds to step S18 and step S1.
The time that is the second predetermined time that is set in advance in the ROM 193 and that is set to be equal to or longer than the time required to reach the stopped state during the normal stop, which is the elapsed time t from when the operation signal measured in 4 is turned off. t2 (for example, about 2s)
If smaller, the process returns to step S15 and the speed determination is performed again. However, when t ≧ t2 here,
Although the time t2 has been reached, the predetermined speed (0
If it is not less than the value close to (), it is considered that there is a possibility that a problem such as a decrease in the brake torque has occurred. Therefore, move to step S11 and turn the emergency stop relay OFF.
When F is applied, power supply to the drive motor and the electromagnetic brake is cut off, and the man conveyor is emergency stopped by an emergency stop means such as a newly provided auxiliary brake. Then, it waits until investigation and handling of the trouble that has occurred. At that time, the administrator may be notified by a buzzer or the like at the same time as the passenger conveyor is stopped, or the passengers may be notified by an automatic announcement or the like.

According to this embodiment, the step speed detecting device 1
Step speed information from 6 and handrail speed detection device 17
The handrail speed information from the computer and the operation status information from the operation signal generating means are sequentially input to the RAM 191 in the small computer 19, the arithmetic unit 194 executes the control program stored in the ROM 193, and the speed input to the RAM 191. Based on the information, it becomes possible for the small computer 19 to detect the fear of a decrease in the brake torque, which has been conventionally detected by the operator during inspection, at the time of daily operation stop, and the decrease in the brake torque can be early detected. It is also possible to find it, improving the workability of maintenance and inspection. Further, since the passenger conveyor is immediately stopped immediately when a decrease in the brake torque is detected, the safety of passengers is further improved.

Embodiment 4. In the fourth embodiment, the operation during the stop operation of the passenger conveyor in the stopped state (the operation after the time measurement is stopped in step S16) will be described. The operation signal is OFF while the operation of the passenger conveyor is stopped and the operation is stopped. In this state,
Both the step speed VS and the handrail speed VH should be zero. During this time, the computing unit 194 in the small computer 19
Then, step S17 has been entered, and the step speed detection device 1
6 and the handrail speed VH, which is the preset fifth reference speed V5 (for example, a value close to 0), based on the speed information input from the handrail speed detection device 17 to the RAM 191. ) It is determined whether or not the following.

If V5 ≧ VS and V5 ≧ VH, it is determined that there is no abnormality, and the determination in step 17 is repeated. However, if the step speed VS becomes V5 or more here,
For example, it is determined that the passenger is riding on the passenger conveyor even though the passenger conveyor is in the stopped state and the passenger's load is causing the passenger conveyor to move. Therefore, the process proceeds to step S11, and the emergency stop relay is turned off. The electric power supply to the drive motor and the electromagnetic brake is cut off, and the emergency stop means, for example, a newly provided auxiliary brake is used to emergency stop the passenger conveyor. Then, it waits until investigation and handling of the trouble that has occurred. At that time, the administrator may be notified by a buzzer or the like at the same time as the passenger conveyor is stopped, or the passengers may be notified by an automatic announcement or the like.

According to this embodiment, the step speed detecting device 1
Step speed information from 6 and handrail speed detection device 17
Handrail speed information from the R in the small computer 19
The data is sequentially input to the AM 191 and the arithmetic unit 194 stores the ROM 1
The control program stored in 93 is executed, and the RAM 19
Based on the speed information input in 1, it becomes possible for the small computer 19 to detect the fear of a decrease in the brake torque, which was conventionally detected by the operator during inspection, during the operation stop, The workability of maintenance and inspection is improved. Also, because the condition of the stopped man conveyor is constantly monitored,
It is safe even if a passenger accidentally gets on the passenger conveyor.

Embodiment 5. According to the embodiment as described above, the passenger conveyor is stopped for the malfunction of the generated device, and the safety of passengers and the early detection of the malfunction of the device are possible.
The restart of the passenger conveyor after the emergency stop will be described.

With respect to the control device of the man conveyor, after the malfunction is detected and the man conveyor is stopped, the operation can be restored by operating the man conveyor operation key at the site, which hinders normal operation. In the case of a malfunction such as slipping of the handrail due to moisture that does not cause a problem such as automatic recovery after a while, the time required for recovery is short, and there is an effect that it does not have to interfere with traffic. Auto-reset mode that enables the conveyor owner to restart, and after stopping the man-conveyor by detecting problems such as motor torque drop and V-belt breakage, by operating the man-conveyor operation key at the site. It is a mechanism that makes it impossible to return to operation, and in the case of a problem that seriously hinders the operation of the man conveyor, an easy operation return And manual reset mode to disable the only restart after the treatment of the maintenance company which has the effect of preventing large of a disaster to happen, to be able to choose from two types of. By doing so, it becomes possible to flexibly respond to the difference in specifications.

[0035]

Since the present invention is constructed as described above, it has the following effects. Steps arranged in an endless manner, an endless handrail that operates in the same direction as this step, handrail speed detecting means for detecting the moving speed of the handrail, and a step for detecting the moving speed of the step. a speed detecting means, speed of the footstep or handrail detected by the footstep speed detection means or the handrail speed detecting means, the start of operation
Sometimes after receiving an operation command for the above steps and handrail
Once elapsed the first predetermined time required to reach a predetermined speed to a normal startup, upon detecting a value that does not reach the predetermined first reference speed, judges that abnormality, and a control means for outputting a driving stop, the Since it is equipped, it leads to early detection of equipment defects such as sticking of the brake lining, and avoids serious defects and accidents resulting from them.

In addition , the reset device for restarting after commanding the operation stop or emergency stop by the control device can be restarted by operating the operation key on site, or the operation key on site. Since it is possible to select either the manual reset mode in which the restart is impossible only by the operation of, it is possible to meet various required specifications.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a configuration of a passenger conveyor control device according to the present invention.

FIG. 2 is a flowchart showing the operation of the control device according to the present invention.

FIG. 3 is a flowchart showing the operation of the control device in the present invention.

FIG. 4 is a diagram showing a structure of a man conveyor.

FIG. 5 is an enlarged view of a speed detecting device portion of a step and a handrail.

[Explanation of symbols]

1 step band, 2 handrails, 6 steps, 8 driving machine, 16 step speed detecting means, 17 handrail speed detecting means, 18 driving signal generating means, 19 small calculator.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Haruhiko Nakamura               2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo               Within Mitsubishi Electric Corporation (72) Inventor Yasumasa Harita               2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo               Within Mitsubishi Electric Corporation                (56) References JP-A-4-85289 (JP, A)                 JP 64-75393 (JP, A)                 JP-A-6-255972 (JP, A)                 Japanese Patent Publication 2-34878 (JP, B2)

Claims (2)

(57) [Claims] 1. A step arranged in an endless manner, an endless handrail traveling in the same direction as the step, a handrail speed detecting means for detecting a moving speed of the handrail, and a movement of the step. The step speed detecting means for detecting the speed, and the speed of the step or handrail detected by the step speed detecting means or the handrail speed detecting means after the operation command of the step and the handrail is received at the start of operation. Once elapsed the first predetermined time required to reach a predetermined speed to a normal startup, upon detecting a value that does not reach the predetermined first reference speed, judges that abnormality, and a control means for outputting a driving stop, the Man conveyor equipped. 2. A reset device for restarting after commanding an operation stop or an emergency stop by the control device, an automatic reset mode for enabling restart by operating the operation key on site, or an operation key on site Manual reset mode that makes it impossible to restart just by operating
Man conveyor <br/> according to the first claims, characterized in that either the selectable.