JP2006193295A - Handrail driving device of passenger conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handrail driving device of a passenger conveyor capable of detecting the moving speed of a handrail belt, and simplifying the saving work of an installation space, and the mounting and adjusting works. <P>SOLUTION: The handrail driving device of the passenger conveyor has a drive roller 11 to drive a handrail belt 9 with an inner circumferential surface of the handrail belt 9 wound therearound. A plurality of press rollers 12 to press the handrail belt 9 against the drive roller 11 side are provided on an outer circumferential surface side of the handrail belt 9 wound around the drive roller 11. The plurality of press rollers 12 are connected to each other by a connection means 13. The handrail driving device of the passenger conveyor has a handrail movement detection means 20 to detect the movement of the handrail belt 9 by detecting the rotational state of the press rollers 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a handrail drive device for a passenger conveyor.

  The passenger conveyor includes a plurality of steps that are connected endlessly and circulates, and conveys passengers on the steps from one entrance to the other entrance. A balustrade is erected on both sides of the step, and an endless handrail belt provided on the upper portion of the balustrade circulates at the same speed in the same direction as the step.

A handrail driving device for driving the handrail belt is provided in a truss below the balustrade. This handrail drive device includes a drive roller whose outer peripheral surface is made of a material having a high friction coefficient such as rubber, and a driving force is transmitted from the drive device to the drive roller, and a handrail belt is provided on the outer peripheral surface of the drive roller. The handrail belt is driven by the frictional force between the outer peripheral surface of the drive roller and the inner peripheral surface of the handrail belt. Further, in order to increase the frictional force and drive the handrail belt more reliably, a plurality of pressing rollers are provided on the outer peripheral surface side of the handrail belt in a region wound around the outer peripheral surface of the driving roller. For example, Patent Document 1 discloses a handrail drive device that receives a constant urging force from a tension applying device and presses the handrail belt toward the outer peripheral surface of the drive roller.
US Pat. No. 5,638,937

  The handrail belt driven by the handrail drive device needs to circulate and move at the same speed in synchronization with the steps. Therefore, the passenger conveyor is provided with a safety device that stops the operation of the passenger conveyor when the step is moving but the handrail belt stops. This safety device includes a handrail movement detection device that detects the movement speed of the handrail belt, and detects the movement speed of the handrail belt and that the handrail belt is stopped by the handrail movement detection device. The handrail movement detection device is also used for obtaining a speed difference between the moving speed of the handrail belt and the moving speed of the step, or detecting fluctuations in the moving speed of the handrail belt.

  In the handrail movement detection device for detecting the speed of the handrail belt, the handrail belt is sandwiched by rollers from both sides, and a sensor for detecting the rotational speed of the roller is provided, and the handrail belt is moved by the rotational speed of the roller. Some detect speed. Further, there is a type in which detection pieces are arranged at equal intervals inside the handrail belt, a sensor for detecting the movement speed of the detection piece is provided, and the movement speed of the handrail belt is detected based on the movement speed of the detection piece. These conventional handrail movement detecting devices are provided separately from the handrail driving device.

  However, there is a problem that it is difficult to secure an installation space for the handrail movement detection device. In addition, there is a problem that the number of parts of the passenger conveyor is increased by the handrail movement detection device, the cost is increased, and the device itself is large. Furthermore, it takes time to install and adjust the handrail movement detecting device, and there is also a problem that the running resistance of the handrail belt increases due to the adjustment.

  The present invention advantageously solves the above problem, and can detect the moving speed of the handrail belt, thereby reducing the installation space and simplifying the installation and adjustment operations. An object of the present invention is to provide a handrail drive device.

  The handrail drive device for a passenger conveyor according to the present invention is provided on the outer peripheral surface side of the handrail belt that is wound around the inner peripheral surface of the handrail belt and drives the handrail belt, and the handrail belt that is wound around the drive roller. A plurality of pressing rollers for pressing the handrail belt toward the driving roller, a connecting means for connecting the plurality of pressing rollers, and a handrail for detecting the movement of the handrail belt by detecting the rotation state of the pressing roller. And a movement detecting means.

  The handrail drive device for a passenger conveyor according to the present invention includes handrail movement detection means for detecting the movement of the handrail belt by detecting the rotation state of the pressing roller constituting the handrail drive device. The number of points can be reduced, and space saving, installation, and adjustment can be simplified. In addition, it is possible to accurately and reliably detect the movement state of the handrail belt.

  FIG. 1 is an overall view of an escalator as an example of a passenger conveyor provided with the handrail drive device of the present invention. The escalator 1 includes a truss 2 that spans from the upper floor to the lower floor and supports its own weight and load capacity. A plurality of steps 4 that are connected endlessly by a step chain 3 and circulate between the upper floor side and the lower floor side are provided in the truss 2. A drive sprocket 5 is provided at the upper floor side of the step chain 3 and a driving force is transmitted to the step chain 3 wound around the drive sprocket 5. Further, a driven sprocket 6 is provided at a lower portion of the step chain 3 on the lower floor side, and guides circulation movement of the step chain 3 wound around the driven sprocket 6. The driving sprocket 5 is driven by receiving a driving force from a driving device 7 provided at an upper end of the truss 2.

  A balustrade 8 is provided on both sides of the step 4 above the truss 2. At the top of the balustrade, an endless handrail belt 9 that is guided by the balustrade 8 and circulates at the same speed in the same direction as the step 4 is provided. A handrail driving device 10 for driving the handrail belt 9 is provided in the truss 2.

  FIG. 2 shows an enlarged view of a main part of the handrail driving device 10 shown in FIG. 2A is a front view of the handrail drive device 10, and FIG. 2B is a side view of FIG. In FIG. 2, the handrail driving device 10 includes a driving roller 11, and the inner peripheral surface of the handrail belt 9 is wound around the peripheral surface of the driving roller 11. A driving force is transmitted from the driving device 7 to the driving roller 11 by power transmission means (not shown), and the handrail belt 9 is driven by the frictional force between the peripheral surface of the driving roller 11 and the inner peripheral surface of the handrail belt 9. The

  A plurality of pressing rollers 12 are rotatably provided in contact with the outer peripheral surface of the handrail belt 9 wound around the driving roller 11. A plurality of link plates 13 are provided on both side surfaces of each pressing roller 12. Each link plate 13 is provided with through holes at both ends, and the link plate 13 provided on one side surface of the pressing roller 12 and the link plate 13 provided on the other side surface are the through holes of the link plate 13. And a pin 14 that passes through the central axis of the pressing roller 12 or a bush that rotatably supports the pressing roller 12. When these link plates 13 are connected to each other, a plurality of pressing rollers are connected in a chain shape having a predetermined length.

  A support member 15 is attached to a link plate 13A provided at one end of the link plates 13 connected in a chain shape. The support member 15 is attached and fixed to a beam of the truss 2 or the like. On the other hand, a screw rod 16 is fixedly attached to the link plate 13B provided at the other end. The screw rod 16 penetrates the support member 17 and protrudes outward from the support member 17. A compression spring 18 is provided on the protrusion 16a, and a nut 19 is rotatably attached.

  By rotating the nut 19 and moving the screw rod 16 in the axial direction so that the protruding portion 16a becomes longer, the pressing roller 12 applies a pressing force toward the driving roller 11 to the handrail belt 9. . Since each pressing roller 12 contacts and presses over a certain section of the handrail belt 9, the pressing roller 12 presses the handrail belt 9 with an equal load. Due to the pressing force from the pressing roller 12, the frictional force between the driving roller 11 and the handrail belt 9 is increased, so that the handrail belt 9 is more closely attached to the driving roller 11. This prevents the handrail belt 9 from slipping, so that the handrail belt is driven reliably. By adjusting the length of the protruding portion 16a of the screw rod 16 with the nut 19, the pressing force of the pressing roller 12 against the handrail belt 9 can be adjusted.

  As for the relationship between the width of the driving roller 11 and the width of the pressing roller 12, the width α of the pressing roller 12 is larger than the width β of the driving roller 11 as shown in FIG. The handrail driving device of the present invention includes a pressing roller 12, and the pressing roller 12 presses the handrail belt 9, so that the pressing force of the pressing roller 12 is increased and the frictional force between the handrail belt 9 and the driving roller 11 is increased. In such a case, an indentation by the pressing roller 12 may occur on the outer peripheral surface of the handrail belt 9. Therefore, by making the width α of the pressing roller 12 larger than the width β of the driving roller 11, it is possible to suppress the occurrence of indentation on the outer peripheral surface of the handrail belt.

  In the handrail drive device 10 of the present embodiment, a handrail movement detection device 20 is provided on one of the plurality of pressing rollers 12. The handrail movement detection device 20 detects the presence / absence, movement speed, and movement direction of the handrail belt 9 by detecting the rotational speed of the pressing roller 12.

  An example of the handrail movement detection device 20 provided in the handrail driving device 10 will be described with reference to FIGS. 3 and 4. 3 is a front view of the vicinity of the pressing roller 12 to which the handrail movement detection device 20 is attached, and FIG. 4 is a cross-sectional view taken along line AA of FIG.

  3 and 4, the detection piece 21 is attached and fixed coaxially with the rotation shaft of the pressing roller 12, and rotates with the rotation of the pressing roller 12. This detection piece 21 has a protruding portion 21a protruding in the radial direction on its peripheral portion. In the detection piece 21 shown in FIGS. 3 and 4, as an example, there are six protruding portions, that is, the detection piece has 6 pieces.

  A sensor 22 for detecting the rotation of the detection piece 21 is provided in the vicinity of the detection piece 21. The sensor 22 is attached to the sensor support 23 by fastening means and is positioned so as to face the detection piece 21. The sensor support 23 is provided with a through hole at one end thereof, and is fastened and fixed to the pin 14 that forms the rotation axis of the pressing roller 12 by a bolt 24 that passes through the through hole.

  The sensor support 23 is not limited to the one that is attached to the pin 14 that forms the rotation axis of the pressing roller 12 as shown in FIGS. 3 and 4, and within a range in which the rotation of the detection piece can be detected. For example, it can be attached to the link plate 13.

  For example, a proximity sensor can be used as the sensor 22. When the proximity sensor is used, the detection element 22a of the proximity sensor detects that the protrusion 21a of the detection piece 21 passes near the detection element 22a due to the rotation of the detection piece 21, and outputs a pulse signal. . As a result, when the pressing roller 12 rotates, the sensor 22 detects the proximity of the protruding portion 21a of the detection piece 21, so that a pulse signal is generated for each predetermined movement amount of the handrail belt 9 in accordance with the movement of the handrail belt 9. It becomes the structure which generate | occur | produces.

  A lead wire 25 for taking out a signal is connected to the proximity sensor 22. The other end of the lead wire 25 is connected to an operation control device (not shown), and the operation control device stops the handrail belt 9 when the pulse interval of the input pulse signal becomes longer than a predetermined value as in the conventional case. Judge that it is.

  That is, in a normal driving situation, the pressing roller 12 pressing the handrail belt 9 by the circular movement of the handrail belt 9 is driven to rotate, and the detection piece 21 also rotates at the same speed as the pressing roller 12. Therefore, as long as the handrail belt 9 is driven at a normal speed, the detection piece 21 rotates together with the pressing roller 12 and outputs 6 pulses for each rotation of the pressing roller 12, and the pulse interval is almost a specified value. It is constant. However, when the handrail belt 9 becomes slower than the step speed by a predetermined rate or stops completely for some reason, the pulse interval of the pulse signal output from the proximity sensor 22 becomes slower than the predetermined value. Or no output. Therefore, when the operation control device described above detects this and determines the movement status of the handrail belt, and determines that the operation of the passenger conveyor should be stopped, the safety device for the handrail belt escalator is operated.

  Further, since the pulse signal is generated for each predetermined movement amount of the handrail belt 9, the movement speed of the handrail belt can be calculated based on the pulse interval from the sensor 22.

  In the handrail drive device of this embodiment, since the handrail movement detection device 20 is incorporated in the handrail drive device 10, it is not necessary to provide a handrail movement detection device separately from the handrail drive device 10. Therefore, the installation space can be reduced, and the number of necessary parts can be reduced, so that the installation and adjustment work time can be greatly shortened, and the cost can be reduced.

  Moreover, in the handrail drive device of this embodiment, the handrail movement detection device 20 is attached to the pressing roller 12. Since the pressing roller 12 presses the handrail belt 9, no slip occurs between the pressing roller 12 and the handrail belt 9, and thus the most suitable part for detecting the moving state of the handrail I can say that. By attaching the handrail movement detection device 20 to such a pressure roller 12, it becomes possible to collect data stably.

  In the present embodiment, the sensor 22 is not limited to the proximity sensor described above, and for example, a pulse generator can be used. Even when the pulse generator is used, a pulse signal corresponding to the rotation of the pressing roller 12 is generated as in the case of using the proximity sensor, so that the handrail belt 9 is stopped based on the pulse interval. And the moving speed information of the handrail belt 9 can be obtained. Further, an ultrasonic sensor can be used, and a reflected light detection type photoelectric sensor or a transmitted light detection type photoelectric sensor can also be used.

  Further, a plurality of proximity sensors can be arranged on one pressing roller. By arranging a plurality of proximity sensors on one pressing roller, the moving direction (forward rotation, reverse rotation) of the circular movement of the handrail belt 9 can be detected. This will be described with reference to FIG. FIG. 5 is a front view of the vicinity of the pressing roller 12 to which another example of the handrail movement detection device is attached. In FIG. 5, the same members as those in FIG. 3 are denoted by the same reference numerals, and redundant descriptions are omitted below.

  In the handrail movement detection device shown in FIG. 5, sensors 22 </ b> A and 22 </ b> B that detect the rotation of the detection piece 21 are provided close to the detection piece 21 and parallel to the tangential direction of the detection piece 21. The sensors 22 </ b> A and 22 </ b> B are attached to the sensor support 23 by fastening means and are positioned so as to face the detection piece 21.

  For example, proximity sensors can be used as the sensors 22A and 22B. The proximity sensor detects that the protrusion 21a of the detection piece 21 passes near the detection element 22a by the rotation of the detection piece 21, and outputs a pulse signal.

  As shown in FIG. 5, when the protrusion 21a of the detection piece 21 is positioned between the sensors 22A and 22B, both the sensors 22A and 22B are configured to output a pulse signal. Then, when the handrail belt 9 moves in either the right direction or the left direction of the drawing from this state, the pressing roller 12 that presses the handrail belt following this movement rotates clockwise or counterclockwise. Rotate to. At this time, since either one of the sensors 22A and 22B approaches the protruding portion 21a of the detection piece 21, the output of the pulse signal is continued, and the other sensor is separated from the protruding portion 21a. Output stops. Therefore, it is possible to confirm the moving direction of the handrail belt by monitoring the detection signals from the sensors 22A and 22B and examining which sensor signal is interrupted from the state in which the detection signals are output simultaneously. it can.

  In the handrail driving device of the present invention, the handrail movement detecting device 20 can be provided on a plurality of pressing rollers.

  Next, another embodiment of the handrail drive device of the present invention will be described.

  FIG. 6 is a cross-sectional view of an example of a pressing roller of the handrail driving device of the present embodiment. The outer peripheral member 12a provided in the portion that contacts the outer peripheral surface of the pressing roller 12 shown in FIG. 6 is made of resin or rubber so that the frictional force is increased. The outer peripheral member 12a is attached to the base member 12b. The base member 12b is made of a metal material such as aluminum or iron, and a groove that fits with a protrusion provided on the inner peripheral portion of the outer peripheral member 12a is formed on the outer peripheral portion thereof.

  Also, a protrusion 12c is formed at one end in the width direction of the base member 12b, and the outer peripheral member 12a is attached and fixed to the base member 12b by engaging the outer peripheral member 12a with the protrusion 12c. A step portion 12d is provided at the other width direction end portion of the base member 12b, that is, an end portion on the side where the detection piece 21 is attached, and the outer peripheral member 12a is disposed at a predetermined thickness on the step portion 12d. The This is to prevent the sensor 22 arranged close to the detection piece 21 from malfunctioning due to the metallic base member 12b, and the metallic base member 12b has a predetermined thickness from the protruding portion 21a of the detection piece 21. For example, a structure separated by about 5 mm or 5 mm or more is used. Thereby, the base member 12b has an asymmetric shape in the width direction when viewed in cross section.

  As described above, the handrail drive device of the present invention includes a pressing roller, and there is a possibility that an indentation is generated on the outer peripheral surface of the handrail belt by the pressing roller. Therefore, in the present embodiment, the hardness of the material of the outer peripheral member 12a of the pressing roller is adjusted in order to prevent the occurrence of the indentation. Specifically, the surface hardness of the outer peripheral member 12a is preferably 50 to 80 degrees. By the simulation tests and various tests by the inventors, the hardness of the surface of the outer peripheral member 12a is reduced (softened), specifically, adjusted within an appropriate range of about 50 to 80 degrees, thereby the handrail belt 9 It is possible to prevent indentation from occurring on the outer surface.

  However, if the hardness of the outer peripheral member 12a is reduced (softened), the overall rigidity is reduced. Therefore, the hardness of the outer peripheral member 12a is changed in the thickness direction, and only the surface layer is set to 50 to 80 degrees as described above. Can have a higher rubber hardness. Thus, by changing the rubber hardness between the surface layer and the inner layer of the outer peripheral member 12a, the surface layer effectively reduces the hardness of the handrail belt by reducing the hardness, while the inner layer reduces the hardness. Increasing the rigidity can increase the rigidity and durability.

  In order to prevent the above-described indentation of the handrail belt, it is preferable that the shape of the outer peripheral surface of the pressing roller 12 is an arc shape having a concave central portion in the width direction. FIG. 7 is a schematic diagram of the pressing roller 12. As shown in FIG. 7, the outer peripheral surface of the handrail belt 9 pressed by the pressing roller 12 has a convex shape with a raised central portion in the width direction. When the shape of the outer peripheral surface of the pressing roller 12 that presses against the handrail belt 9 having such a shape is flat or convex, there is a possibility that an indentation will occur. Therefore, as shown in FIG. 7, the indentation can be effectively prevented by making the shape of the outer peripheral surface of the pressing roller 12 concave. More preferably, the concave curvature is set so as to fit the convex shape of the outer peripheral surface of the handrail belt 9 when the pressing roller 12 is pressed against the handrail belt 9 with a predetermined pressing force. Further, in combination with the above-described adjustment of the hardness of the outer peripheral member 12a, generation of indentation can be more effectively prevented.

It is a general view of the escalator as an example of a passenger conveyor provided with the handrail drive device of the present invention. It is a principal part enlarged view of a handrail drive device. It is a front view of the press roller vicinity. It is AA sectional drawing of FIG. It is a front view of the press roller vicinity. It is sectional drawing of an example of the press roller of a handrail drive device. 3 is a schematic diagram of a pressing roller 12. FIG.

Explanation of symbols

9 Handrail belt 11 Drive roller 12 Press roller 12a Outer peripheral member 12b Base member 13 Link plate (connecting means)
20 Handrail movement detection device (handrail movement detection means)
22 Sensor 23 Sensor support

Claims (9)

A driving roller for driving the handrail belt by winding the inner peripheral surface of the handrail belt;
A plurality of pressing rollers provided on an outer peripheral surface side of the handrail belt wound around the driving roller, and pressing the handrail belt toward the driving roller;
Connecting means for connecting the plurality of pressing rollers;
A handrail driving device for a passenger conveyor, comprising handrail movement detecting means for detecting movement of the handrail belt by detecting a rotation state of the pressing roller.   2. The handrail drive device for a passenger conveyor according to claim 1, wherein the handrail movement detection means is attached to a rotating shaft of the pressing roller or a support fixed to the connecting means.   The handrail driving device for a passenger conveyor according to claim 1 or 2, wherein the handrail movement detecting means includes a sensor for detecting rotation of the pressing roller.   4. The handrail drive device for a passenger conveyor according to claim 3, wherein the handrail movement detecting means includes a plurality of sensors for detecting a moving direction of the handrail belt.   The said press roller is provided with the outer peripheral member which comprises the outer peripheral surface of a press roller, and the hardness of this outer peripheral member is the range of 50-80 degrees, The any one of Claims 1-4 characterized by the above-mentioned. Handrail drive device for passenger conveyors.   6. The handrail drive device for a passenger conveyor according to claim 5, wherein the outer circumferential member has different hardness in the thickness direction, the hardness of the surface layer is 50 to 80 degrees, and the hardness of the inner layer is equal to or higher than the surface layer. .   The handrail drive device for a passenger conveyor according to any one of claims 1 to 6, wherein the outer peripheral surface of the pressing roller has an arc shape with a concave central portion in the width direction.   The press roller includes a metal base member that supports and fixes the outer peripheral member, and the base member has a shape spaced apart from a detection piece attached to the press roller by a predetermined distance. The handrail drive device of the passenger conveyor of any one of claim | item 1 -7. The handrail drive device for a passenger conveyor according to any one of claims 1 to 8, wherein a width of the pressing roller is larger than a width of the drive roller.

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