JP3596294B2 - Passenger conveyor - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a passenger conveyor such as an escalator and an electric road, and more particularly to a passenger conveyor that performs a novel braking control.
[0002]
[Prior art]
Generally, when stopping a passenger conveyor during operation, there are a normal stop in which operation is stopped at the end of work with a dedicated operation key, and an emergency stop in which a safety device or a protection device is activated to stop operation.
[0003]
For example, a passenger conveyor configured to stop the operation urgently based on the operation of a safety device is disclosed in Japanese Patent Application Laid-Open No. 7-202074.
[0004]
[Problems to be solved by the invention]
The conventional passenger conveyor described above does not take into account the possibility of reducing the damage to the passenger when the safety device is activated due to the passenger or the accident of the passenger falling due to an unexpected emergency stop during driving.
[0005]
An object of the present invention is to provide a passenger conveyor that can reduce the damage to the passenger when the safety device is activated due to the passenger and can prevent the passenger from overturning due to an unexpected emergency stop during driving.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a passenger transporter that circulates between both floors, an electric motor that drives the passenger transporter, a plurality of stop signal generating means installed at various places, A braking device for generating a braking force based on a stop signal generated by the generation means, a braking command for determining a stop signal from the plurality of stop signal generation means and controlling deceleration of the rotation speed of the electric motor. Means were provided.
[0007]
With the above configuration, the operation can be stopped by decelerating the rotation speed of the electric motor in response to the stop signals from the plurality of stop signal generating means, so that, for example, in the case of an operation stop caused by a passenger, In order to minimize the damage by increasing the stop speed, and in the case of operation stoppage due to the operation of protective devices, etc., reduce the stop speed to reduce the impact of stopping to the passengers to prevent falling. be able to.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described based on an escalator shown in FIGS. As shown in FIG. 2, a general escalator is configured by supporting a necessary device on a frame 3 installed over a lower floor 1 and an upper floor 2 of a building. A lower platform 4 and an upper platform 5 are provided at both ends in the longitudinal direction of the frame 3, and an endless passenger transporter circulates between the two platforms 4 and 5. In the case of an escalator, this passenger transport is constituted by a plurality of steps 6 connected endlessly by a step chain 7. On the other hand, although not shown, in the case of an electric road, there are a case where it is constituted by a plurality of steps connected endlessly by a chain and a case where it is constituted by an endless belt.
[0009]
The step chain 7 is wound on one side around a driving sprocket 8 pivotally supported on the lower side of the upper getting on / off floor 5, and is wound on one side around a driven sprocket 8 pivotally supported on the lower side of the lower getting on / off floor 4. It is wound. Furthermore, a balustrade is provided on both sides of the step 6 along the longitudinal direction of the frame 3, and a moving handrail 10 is guided on the periphery of the balustrade so as to be able to move synchronously with the step 6. A driving device 11 for driving the driving sprocket 8 is also provided below the upper floor 5.
[0010]
The drive device 11 includes an electric motor 12 and a speed reducer 13 as shown in FIG. One end of an input shaft 13S of the speed reducer 13 is connected to a rotating shaft 12S of the electric motor 12 via a shaft joint 15, and a braking device 14 is provided at the other end of the input shaft 13S. A sprocket 17 is mounted on the output shaft 16 of the speed reducer 13, and a drive chain 18 is wound around the sprocket 17. The drive chain 18 is wound around a power sprocket 19 coaxial with the drive sprocket 8.
[0011]
In addition, the escalator is configured to start operation at the start of work and to stop operation at the end of work by turning on / off the dedicated operation key 30 shown in FIG.
[0012]
Further, the escalator is provided with first safety devices 31A and 31B at the entrance of the moving handrail 10 into the balustrade, and a plurality of second safety devices 32A to 32F inside the skirt guard separating the steps 6 and the balustrade. Many purpose-specific safety devices are provided. For example, the first safety devices 31A and 31B are provided as detection means for suddenly stopping the operation of the escalator when the finger of the baby and the moving handrail 10 are about to be pulled into the balustrade. The safety devices 32A to 32F are provided as detecting means for stopping the operation of the escalator when passenger's footwear or feet are about to be retracted between the steps 6 and the skirt guard, The second safety devices 32A to 32F have a longer braking time than the first safety devices 31A and 31B and are gently stopped to prevent passengers from falling over. Further, the escalator is provided with a power failure detection means 33 for detecting a power failure and interrupting the opening of the power supply of the electric motor 12.
[0013]
The dedicated operation key 30, the safety devices 31A, 31B, 32A to 32F, and the power failure detection means 33 serve as stop signal generation means for generating a signal for stopping the operation of the escalator, and based on a stop signal from these stop signal generation means. The motor 12 and the braking device 14 are operated via the braking command means 34. The braking instruction means 34 determines a braking content for determining whether to perform an abrupt stop or a gentle stop by determining a stop signal from the dedicated operation key 30, the safety devices 31A, 31B, 32A to 32F, and the power failure detecting means 33. It has a content selection device 35 and braking command devices 36A to 36N which are selected by a command from the braking content selection device 35 and provide a plurality of braking commands having different braking patterns for operating the electric motor 12 and the braking device 14. Further, a rotation speed control device 37 including, for example, an inverter device or the like for decelerating and controlling the rotation of the electric motor 12 based on commands from the braking command devices 36A to 36N is provided. Next, the operation of the braking command means 34 will be described. For example, when the operation of the escalator is stopped at the end of work by the dedicated operation key 30, when a stop signal is issued by the dedicated operation key 30, the safety devices 31A, 31B, 32A to 32F for protecting passengers and the power failure detecting means for protecting equipment are provided. It is determined by the braking content selection device 35 that the signal is not a stop signal from 33, and a braking command device 36A that stops at a normal braking distance is selected. The selected braking command device 36A linearly changes the rotation speed of the electric motor 12 from a to b as shown in the braking pattern of the relationship between the output frequency (%), time, speed (m / min) and time shown in FIG. A lowering command is issued, and the braking command is sent to the rotation speed controller 37, and a one-step braking pattern for decelerating the escalator and stopping it naturally is issued. When the power failure detection means 33 is activated, the power supply opening is cut off, so that the rotation speed control of the electric motor 12 becomes impossible. Is naturally stopped due to the linear braking.
[0014]
On the other hand, when the first safety devices 31A and 31B are activated to generate a stop signal, the operation of the escalator must be stopped immediately because urgency is required, and the braking command device 36B for sudden stop is selected. FIG. 5 shows a braking pattern of the relationship between the output frequency (%) of this braking command device 36B, time, and speed (m / min) and time. The braking command device 36B first performs a command to gradually decrease the rotation speed of the electric motor 12, that is, performs a primary deceleration with a weak braking force from a to b illustrated in FIG. 5, and then increases the rate of decrease in the rotation speed. (B to c), and has a braking pattern for instructing so-called two-stage braking in which a strong braking force is applied to decelerate and stop. This braking command is sent to the rotation speed control device 37, and the rotation speed of the electric motor 12 is reduced by two steps in accordance with the command in the time periods a to c and suddenly stopped.
[0015]
In this case, when the rotation speed of the electric motor 12 decreases and the motor 12 decelerates to a level of about 10% of the rated rotation speed, it is desirable to use a well-known braking device 14 such as a disk brake or a drum brake. This is because, generally, when the rotation speed is reduced by an inverter device and the rotation speed falls into a low frequency (for example, 5 Hz or less) region, the stability of the rotation speed control becomes inferior, so that it is convenient to use the braking device 14 together. It is. Further, in the low frequency region, the command of the rotation speed control device 37 may be cut off to exert the braking function of the braking device 14 alone.
[0016]
Next, when the second safety devices 32A to 32F are activated and a stop signal is issued, the top priority is to stop driving and avoid a fall accident due to unexpected braking on the passenger, The braking command device 36N for gentle stop is selected. FIG. 6 shows a braking pattern of the relationship between the output frequency (%) of the braking command device 36N, time, and speed (m / min) and time. The braking command device 36N commands so-called two-stage braking in which the rotational speed of the electric motor 12 is firstly decelerated with a gentler braking force than the braking command device 36B, and then the braking force is increased and the secondary speed is reduced to stop. It has a braking pattern. In this case, since it is not necessary to stop the vehicle urgently, the braking command device 36A is stopped naturally, and the braking command device 36B is gently stopped with a longer braking time than the sudden stop. I have.
[0017]
By the way, the operation of the dedicated operation key 30 is based on the premise that there is no passenger on the escalator step 6 under the supervision of a driver, so that there are no limited conditions for sudden stop or slow stop. Nor. However, in the case where the operation is stopped due to the operation of the various safety devices 31A, 31B, 32A to 32F, assuming the use of the passenger, the passenger is suddenly stopped. . Therefore, the present inventors conducted a monitor test on the relationship between each of the braking patterns shown in FIGS. 4 to 6 and the fall of the passenger, and found that the two-stage braking pattern was obtained for both the sudden stop and the gentle stop shown in FIGS. With the assurance of superiority, the two-stage braking system described above was described. By this monitor test, the passenger foresees the stop of driving in the speed change range between a and b in FIGS. 5 and 6 and mentally and physically prepares for the complete stop between b and c and simultaneously moves the handrail 10. The effect of performing an emergency evacuation operation such as grasping has been confirmed.
[0018]
In addition, since the magnitude of the friction loss of the movable member of the escalator and the magnitude of the inertia force received by the passenger when the escalator is stopped differ between the stop during the ascent operation and the stop during the descent operation, the braking pattern between the ascent operation and the descent operation For example, it is desirable to provide a braking command device that commands two-stage braking with different braking patterns by changing the secondary deceleration distance or the like.
[0019]
Further, the present invention is not limited to the two-stage braking, and a command may be issued for two or more stages of plural-stage braking.
[0020]
Further, the braking content selection device 35, the braking command devices 36A to 36N, the rotation speed control device 37, and the like have been described as independent devices. However, if a composite function by a microcomputer is applied, the above devices can be combined. It is possible.
[0021]
As described above, when the operation is stopped in a state where the passenger is on the step 6, all of the braking command devices 36A to 36N are operated by the first safety devices 31A and 31B and the second safety devices 32A to 32F. A braking pattern of a sudden stop or a slow stop to be provided according to each braking purpose is provided, and the braking in the braking pattern is configured to command at least a plurality of stages of primary deceleration and secondary deceleration. .
[0022]
In summary, the above-described embodiment has a braking configuration in which a safety device is provided with a braking pattern of a sudden stop or a gentle stop, and a plurality of stages of braking are performed in the braking pattern. In the above description, the escalator is used as an example of the passenger conveyor. However, it is needless to say that the present invention can be applied to an inclined electric road and a horizontally installed electric road.
[0023]
【The invention's effect】
As described above, according to the present invention, it is possible to obtain a passenger conveyor that can reduce the damage to the passenger when the safety device is activated due to the passenger and that can prevent the passenger from falling due to an unexpected emergency stop during driving. .
[Brief description of the drawings]
FIG. 1 is a block diagram showing a braking command device for a passenger conveyor according to the present invention.
FIG. 2 is a schematic side view showing an escalator provided with a passenger conveyor braking command device according to the present invention.
FIG. 3 is a plan view showing a driving device for a passenger conveyor according to the present invention.
FIG. 4 is a diagram showing a braking pattern by one-step deceleration.
FIG. 5 is a diagram showing a braking pattern by two-stage deceleration.
FIG. 6 is a braking pattern diagram by another two-stage deceleration.
[Explanation of symbols]
4 lower floor, 5 upper floor, 6 steps (passenger carrier), 12 electric motor, 14 braking device, 30 special operation keys, 31A, 31B first safety device, 32A to 32F Second safety device, 34 ... braking command means.

Claims (4)

And passenger transport body both passenger interbed circulating movement, a balustrade erected on both sides of the passenger carrier, a moving handrail which moves the peripheral edge of the balustrade, an electric motor for driving the passenger carrier, the A plurality of stop generating means including a first safety device provided at an entrance of the moving handrail into the balustrade, and a second safety device provided inside a skirt guard separating the steps and the balustrade; A passenger conveyor provided with a braking device that generates a braking force based on a stop signal generated by the generating unit; a braking content selection device that determines a stop signal from the plurality of stop signal generating units; A plurality of braking command devices selected by the braking content selection device and a rotation speed control for controlling the rotation speed of the electric motor based on a braking pattern from the braking command device. And a device, the plurality of braking command device, when the second safety device issues a stop signal, the than if the first safety device issues a stop signal, the stop command to increase the braking time A braking command device that issues a pattern, a braking command device that issues a command for a sudden stop pattern , and a braking command device that issues a command for a slow stop pattern with a longer braking time than the sudden stop pattern. A passenger conveyor characterized in that a braking command device for issuing a command and a braking command device for issuing a command of a gentle stop pattern have a stop pattern for controlling deceleration by dividing the number of rotations of the electric motor into a plurality of times. The passenger conveyor according to claim 1, wherein the plurality of braking command devices include a braking command device that issues a command of a natural stop pattern. The braking command device for issuing the command for the sudden stop pattern and the braking command device for issuing the command for the slow stop pattern are provided with a stop for increasing the deceleration for the second and subsequent times and performing a deceleration control by dividing the rotational speed of the electric motor into a plurality of times. The passenger conveyor according to claim 1, having a pattern. The passenger conveyor according to claim 1, 2, or 3, wherein the braking device is configured to operate after a speed reduction control of the electric motor.

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