JP2011140376A - Man-conveyor braking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a man-conveyor braking device capable of ensuring a predetermined short braking distance at a sudden stop without being affected by the timing of applying the brake. <P>SOLUTION: The man-conveyor braking device stops a man-conveyor with the predetermined short braking distance when there is a high possibility that a user is directly affected, and stops the man-conveyor while preventing a user from being toppled when there is low possibility that the user is affected. The man-conveyor braking device has a disk brake for sudden stop with less slip and a disk brake for slow stop with more slip which apply brake to a transmission mechanism for transmitting the driving force to drive the man-conveyor, and a controller which operates the disk brake for sudden stop when inputting the signal from a safety circuit for detecting any abnormality of high possibility that a user is directly affected, and operates the disk brake for slow stop when inputting the signal of low possibility that a user is directly affected. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a brake device for a man conveyor such as an escalator.

  The brake system of the man conveyor that can increase the safety at the time of braking without increasing the capacity is equipped with a braking circuit that operates the brake with a plurality of stop signals, two sets of brakes are provided, and the braking circuit stops a major failure A quick stop circuit that simultaneously activates two sets of brakes by a signal and a slow stop circuit that activates a set of brakes by a stop signal of a minor failure are provided (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 5-262488

However, since the wear of the brake shoes of the two brakes does not advance equally, if one of the brake shoes wears more, even if the two sets of brakes are activated by a serious failure stop signal, only one of the brakes works well, and the other However, there is a problem that the braking distance is extended because braking is not sufficient.
Further, there is a problem that the braking distance varies even when the two sets of brakes are operated with a slight difference in timing.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a braking device for a man conveyor that ensures a predetermined short braking distance at the time of a sudden stop without being influenced by the timing at which the brake is applied. And

  The braking device for the man conveyor according to the present invention stops the man conveyor at a predetermined short braking distance when the user is highly likely to be damaged, and prevents the user from falling when the possibility of being damaged is low. A brake device for the man conveyor that stops the man conveyor while the disc brake for sudden stop with small slip and the disc brake for slow stop with large slip that brake the transmission mechanism that transmits the driving force for driving the man conveyor When a signal is input from a safety circuit that detects an anomaly that is likely to be directly damaged by the user, a signal that is unlikely to be directly damaged by the user is input while operating the disc brake for sudden stop. And a controller for operating the disc brake for slow stop.

  The brake device of the man conveyor according to the present invention can prevent the user from being damaged because the man conveyor is stopped at a short braking distance by the disc brake for sudden stop with a small slip when the user is highly likely to be damaged. When the user is unlikely to be directly damaged, the man conveyor is stopped at a long braking distance by the slow stop disc brake having a large slip, so that the user can stop the man conveyor without falling down.

It is a block diagram of the step drive device which provided the brake device of the escalator which concerns on this invention. It is sectional drawing of a disc brake. It is a flowchart which shows the procedure of operation | movement of the braking device of the escalator which concerns on this invention.

A preferred embodiment of a braking device for a man conveyor according to the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram of a step drive device provided with a brake device for a man conveyor according to the present invention. FIG. 2 is a sectional view of the disc brake. In the following description, an escalator will be described as an example of a man conveyor, but the present invention can also be applied to a walking sidewalk.
The endless step of the escalator according to the present invention is moved by driving a step chain 14 connected to a front wheel shaft of a front wheel (not shown) guided by a step rail (not shown) by a step driving device. The step drive device includes a step chain sprocket 13 for driving the step chain 14, a drive chain 10 for rotating the step chain sprocket 13, a drive chain sprocket 4 for driving the drive chain 10, and a drive chain sprocket 4. Reducer 3 fixed to output shaft 3b and pulley 8 fixed to input shaft 3a, drive motor 1 to which pulley 7 is fixed to drive shaft 1a, pulley 8 and drive motor of reducer 3 And a V-belt 9 that transmits a driving force to and from one pulley 7.

  The escalator according to the present invention has an inlet guard switch (HGS) 11a that operates when a hand or the like is caught in the entrance of the moving handrail, and a shoe or the like is sandwiched between the skirt guard and the step. A skirt guard safety switch (SSS) 11b that operates in a case, and a driving chain safety (DCS) device 11c that operates when the drive chain 10 is abnormally extended or disconnected, A step chain safety (SCS) device 11d that operates when the step chain 14 is abnormally extended or cut off, and a step with shoes or the like sandwiched between the step and the step is lifted or the step is run Abnormal Activated when Attari footstep abnormality travel detection: comprises a (CRS Curved Rail Safety) device 11e, the.

  In the escalator according to the present invention, the escalator can be stopped for inspection even when no abnormality has occurred, and a signal for that purpose is also input to the braking device of the escalator.

The braking device for an escalator according to the present invention includes an emergency stop disc brake 2a that applies braking to the output shaft 3b of the speed reducer 3, a slow stop disc brake 2b that increases slip, and a controller 12.
Both the sudden stop disc brake 2a and the slow stop disc brake 2b according to the present invention include a brake disc 21 fixed to the output shaft 3b of the speed reducer 3, a brake shoe 23 to which a brake lining 22 is fixed, and a brake. A spring 24 that applies a pressing force to the brake disc 21 with the shoe 23 and an electromagnetic coil 25 that pulls the brake lining 22 away from the brake disc 21 when an electric current is applied.

The disc brake slippage is caused by the output shaft rotating from the time point when the current flowing through the electromagnetic coil 25 is cut off when the output shaft 3b to which the predetermined torque of the speed reducer 3 is applied is rotating at a predetermined angular velocity. It can be expressed by the magnitude of the rotation angle of 3b.
When braking is applied to the output shaft 3b of the speed reducer 3 with the disc brake 2b for slow stop with a large slip, the step is slowly decelerated, but the brake is applied to the output shaft 3b for the speed reducer 3 with the disc brake 2a for quick stop with small slip. If you make use of, the step will decelerate rapidly.
The magnitude of the slip is realized, for example, by changing the area of the brake lining 22, changing the friction coefficient of the brake lining 22, or changing the biasing force of the spring 24.

  The controller 12 includes an inlet guard switch (HGS) 11a, a skirt guard safety switch (SSS) 11b, a drive chain safety device (DCS) 11c, a step chain safety device (SCS) 11d, and a step abnormal running detection device (CRS) 11e. Based on the input signal, the sudden stop disc brake 2a or the slow stop disc brake 2b is operated to stop the step. The controller 12 also operates the slow stop disc brake 2b even when a stop signal with a normal key is input.

Next, the operation of the escalator braking device according to the present invention will be described. FIG. 3 is a flowchart showing the procedure of the operation of the escalator braking device according to the present invention.
In step S1, signals from the inlet guard switch (HGS) 11a, the skirt guard safety switch (SSS) 11b, the drive chain safety device (DCS) 11c, the step chain safety device (SCS) 11d, and the step abnormal running detection device (CRS) 11e. Is interrupted or an emergency stop button (not shown) is pressed. If it is determined that a signal is interrupted or the emergency stop button is pressed, the process proceeds to step S2. Otherwise, the process proceeds to step S5.
In step S2, it is determined whether the signal is interrupted or the emergency stop button is pressed from the inlet guard switch (HGS) 11a and the skirt guard safety switch (SSS) 11b, and the signal is interrupted or the emergency stop button is pressed. When it is determined that the process has been performed, the process proceeds to step S3. Otherwise, the process proceeds to step S4.

In step S3, the sudden stop disc brake 2a is operated.
In step S4, the slow stop disc brake 2b is operated.
In step S5, it is determined whether or not a normal stop signal is interrupted. When the normal stop signal is interrupted, the process proceeds to step S4. When the normal stop signal is not interrupted, the process returns to step S1.

Thus, when the signal is interrupted from the inlet guard switch (HGS) 11a or the skirt guard safety switch (SSS) 11b or when the emergency stop button is pressed, the emergency stop disc brake 2a is operated, so that the braking distance is shortened. This has the effect of preventing direct user damage.
In addition, when a signal is interrupted from the drive chain safety device (DCS) 11c, the step chain safety device (SCS) 11d or the step abnormal running detection device (CRS) 11e, the slow stop disc brake 2b is operated. The step can be stopped while preventing the vehicle from falling.
By properly using the sudden stop disc brake 2a and the slow stop disc brake 2b having different slips as described above, it is possible to reduce a fall accident due to a sudden stop of the escalator and to brake the output shaft 3b of the speed reducer 3. Sometimes, only one of the sudden stop disc brake 2a and the slow stop disc brake 2b is used, so that there is an effect that a fixed braking distance can be secured without being influenced by the timing at which the brake is applied.

  1 drive motor, 1a drive shaft, 2a sudden stop disc brake, 2b slow stop disc brake, 3 speed reducer, 3b output shaft, 3a input shaft, 4 drive chain sprocket, 7 pulley, 8 pulley, 9 belt, 10 Drive chain, 11a Inlet guard switch (HGS), 11b Skirt guard safety switch (SSS), 11c Drive chain safety device (DCS), 11d Step chain safety device (SCS), 11e Step abnormal running detection device (CRS), 12 control 13 step chain sprocket, 14 step chain 21 brake disc, 22 brake lining, 23 brake shoe, 24 spring, 25 electromagnetic coil.

Claims (2)

The man conveyor is stopped at a predetermined short braking distance when the user is highly likely to be damaged, and the man conveyor is stopped while preventing the user from falling when the possibility of being damaged is low. A device,
Sudden stop disk brake with small slip and brake disk with slow slip with large slip, which brake the transmission mechanism for transmitting the driving force for driving the man conveyor,
When a signal is input from a safety circuit that detects an abnormality that is likely to cause damage to the user directly When the disc brake for emergency stop is activated or a signal that is unlikely to be directly damaged by the user is input A controller for operating the slow stop disc brake;
A brake device for a man conveyor, comprising: The sudden stop disc brake is activated when a signal is input from the inlet guard switch or skirt guard safety switch,
2. The braking device for a man conveyor according to claim 1, wherein the slow stop disc brake is activated when a signal is input from a drive chain safety device, a step chain safety device, or a step abnormal running detection device.

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