JP2002154776A - Moving handrail driving device for passenger conveyor and passenger conveyor operating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moving handrail driving device for a passenger conveyor capable of easily controlling the pushing force and to be housed in a narrow space, and to provide a passenger conveyor operating method using this moving handrail driving device. SOLUTION: In this moving handrail driving device for a passenger conveyor, a driving roller 4 and a pushing roller 11 pinch a moving handrail 3 to drive the moving handrail 3 with the frictional force. The pushing force to the moving handrail 3 is controlled by an actuator 21 for moving the pushing roller forward and backward with and against a pushing spring 14 for giving the pushing force to the pushing roller 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving device for moving a handrail of a passenger conveyor which applies or removes pressure on a moving handrail driven by friction.

[0002]

2. Description of the Related Art A moving handrail of a passenger conveyor is frictionally driven by a driving roller. For this reason, the moving handrail is pressed against the drive roller by the pressing roller so that no slip occurs, and the pressing force is 50 kg or more for one pressing roller. When the passenger conveyor is operating, there is no particular problem because the pressing force is applied equally to each part of the moving handrail. However, when the passenger conveyor is not driven and left for a long time, the above pressing force is continuously applied to one point. For this reason, indentations of the pressure roller were sometimes formed on the moving handrail. Once indented, restoration was almost impossible.

[0003] The moving handrail is held by the passenger with his / her hand, and the indentation impairs the feel. In particular, when a new passenger conveyor is installed, a long time may elapse between the completion of the installation and the start of operation. In such a case, indentations are apt to be formed, which impairs the customer's expectation for the newly installed passenger conveyor, and has caused unpopularity. The invention disclosed in Japanese Patent Application Laid-Open No. 9-255267 has been made to prevent the above-mentioned indentations from occurring, and is intended to reduce the spring force itself applied to the pressure roller.

FIG. 9 shows a conventional passenger handrail drive device for a passenger conveyor in which the pressing force applied to the handrail is reduced by means similar to the means disclosed in the above-mentioned publication to prevent the occurrence of indentations. That is, the moving handrail 3 is sandwiched between the driving roller 4 supported by the bracket 1 constituting the truss and the pressing roller 11 which can move forward and backward, and when the pulley 7 is driven by the V-belt 8, The moving handrail 3 is frictionally driven by the fixed driving roller 4. The connector 5 connects the two drive rollers 4 and mounts the bracket 1 with a mounting bolt 6.
Attached to. The connector 12 connects two pressure rollers 11. Each of the connectors 5 and 12 has an L-shaped bent portion facing each other. Screw rod 54
Penetrates the bent portions of the connectors 5 and 12, one end is rotatably supported by the connector 5, and the other end is locked by the output shaft of a speed reducer 52 that reduces the rotation of the motor 51. And is reversibly rotated by the motor 51.

The speed reducer 52 is fixed to the bracket 2 constituting the truss, and a cylindrical body 53 is fixed to a side surface thereof. Is provided with a guide groove 53a. Further, the cylinder 53 has a moving nut 56 screwed into the screw rod 54 therein, and the guide groove 53 is formed by the rotation of the screw rod 54.
a is guided by a. Moving nut 56 and connector 12
A pressing spring 55 is interposed therebetween, and a threaded rod 54 passes through the pressing spring 55. Accordingly, the rotation of the screw rod 54 causes the moving nut 56 to advance and retreat, causing the pressing spring 55 to expand and contract, thereby pressing the bent portion of the connector 12 toward the moving handrail 3.

Next, the operation will be described. When the passenger conveyor is operated, the screw 51 is rotated by the motor 51 to move the moving nut 56 toward the moving handrail 3. The pressing spring 55 is pressed by the moving nut 56 and presses the pressing roller 11 to the moving handrail 3 via the connector 12. When the moving nut 56 moves to a predetermined position, a detector (not shown) operates to stop the motor 51. The pressing roller 11 presses the moving handrail 3 with a predetermined pressing force. This pressing force generates a frictional force between the driving roller 4 and the moving handrail 3, and the V-belt 8 drives the pulley 7 so that the driving roller 4 moves the moving handrail 3.

When the passenger conveyor is stopped, the motor 51
Rotates in the reverse direction to move the moving nut 56 backward. Press spring 5
5 is extended by the retreat of the moving nut 56. When the moving nut 56 is retracted by the distance df and reaches the position indicated by reference numeral 56 ', the pressing spring 55 has the free length indicated by reference numeral 55'. In this state, the moving handrail 3 is not pressed by the pressing roller 11. Therefore, when the passenger conveyor stops, the moving handrail 3 is not pressed by the pressing roller 11, so that no indentation is made.

[0008]

The conventional handrail drive device for a passenger conveyor is constructed as described above.
In order to prevent indentation, the pressing spring 55 must be extended. In an extreme case, the pressing spring 55 is extended to a free length to reduce the pressing force by the pressing roller 11 to “0”.
Or the pressure must be reduced until the pressing force is such that no indentation is made. For this reason, the moving nut 56 must be retracted from the pressed state to the distance df. The retreat distance df is large, and the screw rod 54 needs to be long. Therefore, the motor 51, the speed reducer 52, and the screw rod 54
Have a long overall length, and it is not easy to store them in a limited space.

In order to relax the pressing spring 55 by the motor 51, the position of the moving nut 56 in the pressed state and the position of the moving nut 56 in the non-pressed state must be detected to control the motor 51. In addition, when the moving nut 56 moves to the set position, the motor 51 must be operated to check whether an appropriate pressing force is obtained from the pressing roller 11 and whether the pressing force is released. . For this reason, there is a problem that adjustment is troublesome.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a moving handrail driving device for a passenger conveyor which can easily apply and remove a pressing force and can be stored in a small space. Provided is a driving method of the used passenger conveyor.

[0011]

According to a first aspect of the present invention, there is provided a moving handrail driving device for a passenger conveyor in which a moving handrail is sandwiched between a driving roller and a pressing roller, and the moving handrail is driven by frictional force. The pressing force applied to the moving handrail is adjusted by an actuator that moves the pressing roller forward or backward by adapting or moving backward to the pressing spring that applies the pressing force.

According to a second aspect of the present invention, the actuator is a cam, and the cam is rotated by a stop signal of the passenger conveyor to push back the pressing roller against the pressing spring to release the pressing force on the moving handrail. The cam is rotated by the operation signal of the passenger conveyor to restore the pressing spring, and the pressing roller is pressed against the moving handrail.

According to a third aspect of the present invention, when an operation signal is issued, the actuator restores the pressing spring to start the operation after the pressing roller presses the moving handrail, and when the stop signal is issued, the actuator is activated. The present invention relates to a method of operating a passenger conveyor using a moving handrail driving device according to claim 1, wherein the pressing roller is pushed back against the pressing spring to release the pressing force on the moving handrail.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Embodiment 1
Shows a cam as an actuator, and FIGS.
Shows a first embodiment of the present invention. In the drawing, reference numerals 1 and 2 denote brackets constituting a truss which is a structure of a passenger conveyor, 3 denotes an endless moving handrail having a C-shaped cross section, and 4 denotes a moving handrail supported by the bracket 1. A pair of drive rollers 5, which are driven by frictional force by rolling on the inner surface, are connected to the bracket 1 by connecting the pair of drive rollers 4, and the intermediate portion is bent down to be L-shaped. A bent portion 5a is formed. Reference numeral 6 denotes a mounting bolt for attaching the connector 5 to the bracket 1, and reference numeral 7 denotes a pulley that is directly connected to the driving roller 4 and is driven by the V-belt 8 to transmit driving force to the driving roller 4.

Reference numeral 11 denotes a pair of pressing rollers for rolling the surface of the moving handrail 3 and pressing the moving handrail 3 against each driving roller 4.
Reference numeral 2 denotes a connector for connecting the pressing roller 11, and the lower portion is L
A bent portion 12a bent in a letter shape is formed.
Reference numeral 2a faces the bent portion 5a of the connector 5 with a predetermined parallel gap therebetween. 13 is a pressing bolt having one end implanted in the bent portion 5a and freely penetrating the bent portion 12a of the connector 12, 14 is a pressing spring through which the pressing bolt 13 passes, and one end is connected to the bent portion 12a via the cap washer 16. The other end is pressed by a cap washer 16 locked by a nut 15 screwed to the pressing bolt 13, and presses the pressing roller 11 against the moving handrail 3 via the connector 12.

Reference numeral 21 denotes a cam having an elliptical cross section inserted into a gap between the bent portion 5a and the bent portion 12a, and functions as an actuator for applying and removing a pressing force. A cam shaft 22 for rotating the cam 21 is supported by the bracket 2. 23
Is a driven sprocket locked to the cam shaft, 24 is an endless chain wound around the driven sprocket 23, 25
Numeral denotes a drive proket on which a chain 24 is wound to drive the driven sprocket 23, and 26 denotes a motor for driving the drive sprocket 25.

Reference numeral 27 denotes a pin implanted on the side surface of the driven sprocket 23, and reference numerals 28 to 31 denote position detecting switches mounted on the bracket 2 at equal intervals of 90 degrees, respectively. 27, the position detection switch 28 or 30 engages with the pin 27 when the major axis of the cam 21 is parallel to the bent portion 12a, and operates when the major axis is orthogonal to the bent portion 12a. 31 is engaged with the pin 27 to operate.

The bent portion 5a has a recessed portion 5b in which the cam 21 side is recessed at a portion facing the cam 21. Therefore, even if the cam 21 rotates, it does not come into contact with the bent portion 5a. As shown in FIGS. 1 and 2, when the major axis of the cam 21 is parallel to the bent portion 12a,
The bent portion 12a and the cam 21 are separated by a gap δ. Therefore, the entire amount of the spring force of the pressing spring 14 becomes the pressing force, and presses the pressing roller 11 against the moving handrail 3 via the connector 12. Further, as shown in FIGS. 3 and 4, when the long diameter of the cam 21 is orthogonal to the bent portion 12a, the cam 21 reverses the bent portion 12a to compress the pressing spring 14. Bend 1
With the backward movement of 2a, the pressing roller 11 retreats to release the pressing on the moving handrail 3.

As shown in FIG. 2, the distance between the rotation center line of the cam 21 and the opposing surface of the bent portion 12a when the major axis of the cam 21 is parallel to the bent portion 12a is d0. FIG.
As shown in FIG. 5, the rotation center line of the cam 21 when the major axis of the cam 21 is orthogonal to the side surface of the bent portion 12a and the bent portion 12a
Is set to d1. When it is determined that the moving handrail 3 and the pressing roller 11 are not deformed by rotating the long diameter of the cam 21 to a position orthogonal to the bent portion 12a,
As shown in FIG. 4, a gap (d1-d0) is formed between the two. Actually, the moving handrail 3 is deformed by the pressing force, but the amount of deformation is small. Therefore, even if the retreat distance of the pressing roller 11 is very small, the pressing force can be released.

FIG. 5 is a block diagram of a control circuit of the passenger conveyor. Reference numeral 41 denotes an operation circuit including a safety circuit and a driving circuit of the passenger conveyor. Reference numeral 42 denotes a start switch for operating or stopping the passenger conveyor. Reference numeral 43 denotes a CPU. Is a ROM in which a control program is stored, and 45 is an R in which data and the like are stored.
AM and 46 are input / output devices for exchanging signals with external devices.

Next, the operation of the passenger conveyor will be described with reference to FIG. When the start switch 42 is turned on to the driving side in step S11, the pressing roller 11 is moved in step S12.
Check if it is pressed against. If it is pressed, a stop command is issued to the motor 26 in step S13, and then the procedure proceeds to step S14.
To start the passenger conveyor. If the pressing roller 11 is not pressed against the moving handrail 3 in step S12, the procedure proceeds to step S12.
At 15, the motor 26 is urged to rotate the cam 21. The cam 21 rotates by 90 degrees, and as shown in FIGS. 1 and 2, the major axis of the cam 21 is parallel to the bent portion 12 a, and the pressing roller 11 presses the moving handrail 3. In this state, pin 27
Actuates the position detection switch 28 or 30, so that the procedure moves from step S12 to step S13, in which the motor 26 is stopped and then the passenger conveyor is started in step S14.

When the start switch 42 is turned to the rest side in step S11, it is checked in step S16 whether the pressing by the pressing roller 11 is released. If the pin 27 has operated the position detection switch 29 or 31, the pressing has been released. If it has been released, the motor 26 is stopped in step S17, and the process is terminated while maintaining the pressed release state. If the pressing is not released in step S16, the motor 26 is urged to rotate the cam 21 in step S18. Cam 21
Is rotated by 90 degrees, and as shown in FIGS. 3 and 4, the major axis of the cam 21 is orthogonal to the bent portion 12a, and when the bent portion 12a is pressed down to compress the pressing spring 14, the pressing roller 11 retreats and the moving handrail moves. Release the pressure on 3. In this state, the pin 27 operates the position detection switch 29 or 31, and when this operation is detected, the process proceeds from step S16 to step S17, in which the motor 26 is stopped, and the process is terminated while maintaining the state of pressing release.

According to the first embodiment, the pressing spring 14
The cam 21 is rotated while keeping the pressing state, the pressing roller 11 is pushed back against the spring force, separated from the moving handrail 3 to release the pressing, and the cam 21 is further rotated to restore the pressing roller 11. As a result, the moving handrail 3 is pressed, so that it is not necessary to move the nut 15 forward and backward to relax the pressing spring 14, and it is only necessary to move the pressing roller 11 a small distance. Therefore, it is easy to apply and remove the pressing force. Further, since the driven sprocket 23 that drives the cam 21 is a thin plate, the size of the cam 21 in the rotation axis direction is short and small.
Therefore, it can be stored even in a small space.
The mounting position of the drive sprocket 25 may be any position as long as it is in the radial direction of the driven sprocket 23, and the degree of freedom in mounting is high.

Further, the bent portion 5a of the connector 5 has a recess 5
Since b is provided, the cam 21 does not interfere with the bent portion 5a. For this reason, the pressing force can be applied and removed by making the cam 21 elliptical and rotating in one direction, and the control of the application of the pressing force is simple. Furthermore, when pressing force is applied to the moving handrail 3, the bending portion 12 a and the cam 21
Is separated by the air gap δ, the entire spring force of the pressing spring 14 can be used as the pressing force. Furthermore,
Since the cam 21 is an actuator, in the steady state where the pressing force is applied and in the steady state where the pressing force is released,
Since no bias is required for the cam 21, a stable pressing force can be applied.

Embodiment 2 FIG. 7 shows a second embodiment of the present invention, in which the same reference numerals as in FIGS. 1 to 6 indicate the same parts. In the second embodiment, the cam shaft 22 is directly connected to the output shaft of a motor 34 fixed to a bracket 33, and the rotational position of the cam 21 is engaged with the sawtooth of a disc 35 attached to the cam shaft 22. It is detected by counting the number of pulses from the pulse generator 36.

According to the second embodiment, since the camshaft 22 is directly connected to the output shaft of the motor 34, there is no problem that the chain comes off the sprocket.

FIG. 8 shows a third embodiment of the present invention.
In the drawings, the same reference numerals as those in FIGS. 1 to 6 indicate the same parts. In the third embodiment, the cam 37 is formed so as to protrude only to one side with respect to the cam shaft 38, and the protruding direction is the bent portion 1
By turning in the direction orthogonal to the side surface of 2a, the bent portion 12a is pushed back, and the pressing roller 11 releases the pressing on the moving handrail 3. Also, as shown by reference numeral 37 'by rotating the cam 37 by 90 degrees, the connector 12 is pushed up by the pressing spring 14 by turning the projecting direction in a direction parallel to the side surface of the bent portion 12a, and the pressing roller 11 11 '
As shown in FIG.

According to the third embodiment, the cam 37 is
A shape protruding only on one side with respect to the cam shaft 38,
Further, since the rotation range of the cam 37 is 90 degrees, even if the gap between the bent portion 5a of the connector 5 and the bent portion 12a of the connector 12 is small, the concave portion 5b shown in FIG. Need not be formed. In the first to third embodiments, the cam 21 or 37 is used as the actuator. However, the present invention is not limited to this. The iron core attracted by the solenoid is used as the actuator, and the pressing roller 11 is moved forward and backward by the iron core. It may be. Further, the passenger conveyor according to the first to third embodiments includes an escalator and a moving sidewalk.

[0029]

Since the present invention is configured as described above, it has the following effects. The invention described in claim 1 is
In a moving handrail driving device for a passenger conveyor, in which a moving handrail is sandwiched between a driving roller and a pressing roller and the moving handrail is driven by frictional force, an actuator for adjusting or reversing a pressing spring that applies a pressing force to the pressing roller to advance and retreat the pressing roller. The pressing force applied to the moving handrail is increased or decreased. For this reason, the pressing force can be applied and removed by moving the pressing roller 11 a minute distance while the pressing spring is set in the pressed state, and there is an effect that the application of the pressing force is easy.

According to a second aspect of the present invention, the actuator is a cam, and the cam is rotated by a stop signal of the passenger conveyor to push back the pressing roller against the pressing spring to release the pressing force on the moving handrail. The cam is rotated by the operation signal of the passenger conveyor to restore the pressing spring, and the pressing roller is pressed against the moving handrail. Because the cam is used as an actuator, no bias is required for the cam in the steady state where the pressing force is applied and in the steady state where the pressing force is released. Is achieved.

According to a third aspect of the present invention, when an operation signal is issued, the actuator restores the pressing spring to start the operation after the pressing roller presses the moving handrail, and when the stop signal is issued, the actuator is activated. The present invention relates to a method of operating a passenger conveyor using a moving handrail driving device according to claim 1, wherein the pressing roller is pushed back against the pressing spring to release the pressing force on the moving handrail.
For this reason, when driving a passenger conveyor, there is an effect that the moving handrail can be reliably pressed.

[Brief description of the drawings]

FIG. 1 is a front view of a moving handrail driving device of a passenger conveyor showing a pressed state of a moving handrail according to Embodiment 1 of the present invention.

FIG. 2 is a side view taken along the line II-II in FIG.

FIG. 3 is a front view of the moving handrail driving device of the passenger conveyor, showing a state in which the moving handrail is depressed according to Embodiment 1 of the present invention;

FIG. 4 is a side view taken along line IV-IV of FIG. 3;

FIG. 5 is a block diagram showing a control circuit of the passenger conveyor according to the first embodiment of the present invention.

FIG. 6 is an operation explanatory view of the passenger conveyor according to the first embodiment of the present invention.

FIG. 7 is a side view of a moving handrail driving device of a passenger conveyor showing a pressed state of the moving handrail according to Embodiment 2 of the present invention.

FIG. 8 is a front view of a moving handrail driving device of a passenger conveyor showing pressing and removing of the moving handrail according to Embodiment 3 of the present invention.

FIG. 9 is a front view of a conventional moving handrail driving device for a passenger conveyor.

[Explanation of symbols]

1 bracket, 2 bracket, 3 moving handrail, 4 drive roller, 5 connector, 5a
Bent part, 5b concave part, 6 mounting bolt,
7 pulley, 8 V belt, 11 pressing roller, 12 connector, 12a bent portion, 13
Press bolt, 14 press spring, 15 nut,
16 cap washers, 21 cams, 22
Cam shaft, 23 driven sprocket, 24 chain, 25 drive sprocket, 26 motor, 27 pin, 28 position detection switch, 2
9 position detection switch, 30 position detection switch,
31 position detection switch, 33 bracket,
34 motors, 35 disks, 36 pulse generators, 37 cams, 38 camshafts.

Claims (3)

[Claims] A driving roller that contacts one surface of a moving handrail of a passenger conveyor and drives the moving handrail by frictional force;
A pressing roller that presses the other surface of the moving handrail to press the moving handrail against the drive roller; a pressing spring that applies the pressing force to the pressing roller; and a pressing roller that adapts or reverses to the pressing spring. An actuator for moving the handrails back and forth to apply and remove pressure on the handrails. 2. An actuator is rotated by a stop signal of a passenger conveyor to push back a pressing roller against a pressing spring to release the pressing force, and is rotated by an operation signal of the passenger conveyor to release the pressing spring. 2. The moving handrail drive device for a passenger conveyor according to claim 1, wherein the cam is configured to restore and press the pressing roller. 3. When an operation signal is issued, the actuator restores the pressing spring and starts operation after the pressing roller presses the moving handrail, and when a stop signal is issued, the actuator opposes the pressing spring. 2. A method of operating a passenger conveyor using a moving handrail driving device according to claim 1, wherein the pressing roller is pushed back to release the pressing on the moving handrail.