JP2011148633A - Passenger conveyor apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a passenger conveyor apparatus safely stopped to prevent the fall of passengers not only when detecting an abnormal condition by a safety switch but when the supply of electric energy stops. <P>SOLUTION: The passenger conveyor apparatus includes a flywheel having a first mass part fixed to a motor shaft, and a plurality of second mass parts having wear resistant members are stored in a groove part which the flywheel has around the first mass part. Then, when the motor is in high rotation immediately after braking is started, the first mass part and the second mass parts contribute to moment of inertia of the flywheel to slowly decelerate, and with the lapse of time, the second mass parts cease to contribute to moment of inertia of the flywheel to quickly decelerate. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a passenger conveyor device that can be braked safely when an emergency stop of the conveyor is performed while passengers are riding.

  Various safety switches are attached to the passenger conveyor device. When an abnormality is detected by the safety switch, the passenger conveyor device turns off the power of the motor of the driving device and performs an emergency stop. Therefore, it is possible to prevent an accident from occurring.

  However, there is a problem that if the conveyor is suddenly braked during an emergency stop, the passenger falls. In this regard, several techniques have been proposed in the past.

  For example, an electromagnetic coil that generates a braking force when the power is cut off and an electromagnetic coil that generates a braking force when the power is supplied are provided, and these electromagnetic coils are combined in a pattern corresponding to a signal from a safety switch, A technique for braking the conveyor has been proposed (for example, Patent Document 1).

  Also, a technology has been proposed in which a slow stop flywheel connected to the drive mechanism via an electromagnetic clutch is provided, and when the abnormal signal from the safety switch is detected, the electromagnetic clutch is connected to gently stop the conveyor ( For example, Patent Document 2).

  Furthermore, a technique has been proposed in which the boarding rate of the passenger conveyor is calculated and the braking timing is changed according to the boarding rate (for example, Patent Document 3).

  However, both of these technologies use electrical energy during an emergency stop. Therefore, there is a problem that the passenger cannot be prevented from falling when the supply of electric energy is interrupted due to a malfunction of the electric system or a power failure.

JP 2000-95469 A JP 2006-36397 A JP 2007-204201 A

  The present invention is a passenger conveyor device capable of safely stopping a passenger conveyor device and preventing a passenger from falling over not only when an abnormality is detected by a safety switch but also when the supply of electrical energy is interrupted. The purpose is to provide.

  The present invention relates to a motor that supplies driving force to a driving device that circulates and rotates a plurality of steps connected endlessly, a first mass unit fixed to a motor shaft of the motor, and a first mass unit that circulates around the first mass unit. A flywheel having a groove portion provided so as to slide, and a rolling contact that is slidably housed inside the groove portion and is biased in the direction of the first mass portion by a spring on a surface facing the first mass portion And a plurality of second mass parts having a wear-resistant member provided on a surface opposite to the surface on which the rolling contact means is provided.

  According to the present invention, the deceleration experienced by the passenger during an emergency stop is initially small and then large. The passenger of the conveyor device feels abnormal with the small deceleration received at the beginning of a sudden stop, and is ready for a fall such as holding and grabbing a moving handrail, so even if a large deceleration after that acts, the passenger will fall There is an effect that it can be avoided.

  In addition, the passenger conveyor device of this embodiment operates in the same way as when the control device issues a stop instruction even when the supply of electrical energy is interrupted due to a malfunction of the electrical system or a power failure, etc. There is an effect that it can be prevented.

It is a side view of the escalator of the 1st Embodiment of this invention. It is a top view of the drive device of a 1st embodiment of the present invention. It is the front view which looked at the flywheel of the 1st Embodiment of this invention from the AA direction of FIG. It is a BB line sectional view of Drawing 3 of a flywheel of a 1st embodiment of the present invention. It is an exploded plan view of the 2nd mass part of a 1st embodiment of the present invention. It is a figure which shows the rotational speed of the motor in the 1st Embodiment of this invention, and the relationship of time. It is the front view which looked at the flywheel of the 2nd Embodiment of this invention from the AA direction of FIG. It is CC sectional view taken on the line in FIG. 7 of the flywheel of the 2nd Embodiment of this invention. It is an enlarged view of the pin drive part of the 2nd Embodiment of this invention. It is a figure which shows the rotational speed of the motor in the 2nd Embodiment of this invention, and the relationship of time.

  Hereinafter, a passenger conveyor device according to an embodiment of the present invention will be described in detail with reference to the drawings. In the following embodiments, an escalator will be described as an example. However, the present invention is applicable not only to escalators but also to all passenger conveyors including auto roads.

(First embodiment)
FIG. 1 is a side view of the escalator 1. As shown in FIG. 1, the escalator 1 includes a truss unit 2 and a drive control unit. The truss portion 2 is provided with a plurality of steps (not shown) connected endlessly and a moving handrail 30. The drive control unit controls the driving device 3 that generates the driving force, the chain 5 that transmits the driving force of the driving device 3, the sprocket 4 that rotates by the driving force transmitted by the chain 5, and the operation of the driving device 3. And a control device 6 that performs the control.

  Further, the escalator 1 includes various safety switches. Examples of the safety switch include emergency stop buttons 7A and 7B, skirt guard safety switches 8A and 8B, inlet portion safety switches 9A and 9B, and step abnormality detection switches 10A and 10B. The outputs of these safety switches are input to the control device 6.

  When the control device 6 rotates the driving device 3, the driving force is transmitted to the sprocket 4 through the chain 5, and the sprocket 4 rotates. The sprocket 4 circulates and drives the steps.

  When a signal for detecting abnormality from the safety switch is input to the control device 6, the control device 6 stops the operation of the drive device 36.

  FIG. 2 is a plan view of the driving device 3. As shown in FIG. 2, the drive device 3 is driven from a motor 11, a coupling 13 installed at one end of a motor shaft 12 of the motor 11, an input shaft 14 connected to the coupling 13, and one end of the input shaft 14. A reduction gear 15 (not shown) to which a force is input.

  The drive device 3 further includes a flywheel 16 at the other end of the motor shaft 12 and an electromagnetic brake 29 at the other end of the input shaft 14. The speed reducer 15 includes an output shaft 17. The output shaft 17 is connected to a chain meshing portion 18, and the chain meshing portion 18 winds the endless chain 5. The chain 5 is also wound around the sprocket 4.

  The speed reducer 15 includes a speed reduction mechanism (not shown) composed of a plurality of gears. The driving force input from the input shaft 14 to the speed reducer 15 is decelerated by the speed reduction mechanism and output from the output shaft 17. The reduced driving force is transmitted to the sprocket 4 via the chain 5.

  The electromagnetic brake 29 maintains the braking state of the brake by a brake spring (not shown) built in the electromagnetic brake 29 when power is not supplied. When the electromagnetic brake 29 receives a brake release command from the control device 6, the electromagnetic brake 29 generates an electromagnetic force by an electromagnet (not shown) built in the electromagnetic brake 29, cancels the elastic force of the brake spring, and releases the brake. To do.

  The control device 6 outputs a brake operation command to the electromagnetic brake 29 when receiving a signal for detecting an abnormality of the escalator 1 from the safety switch. In the electromagnetic brake 29, when a brake operation command is received from the control device 6 or when the supply of electric power is interrupted, the electromagnetic force for releasing the brake disappears and the brake is operated by the brake spring.

  FIG. 3 is a front view of the flywheel 16 as viewed from the direction AA of FIG. As shown in FIG. 3, the flywheel 16 includes a first mass unit 19 that is integrally fixed to the motor shaft 12, and a plurality of second mass units 20 </ b> A that are disposed on the outer periphery of the first mass unit 19. 20B, 20C, 20D. In FIG. 3, the example provided with four 2nd mass parts is shown. Here, it is desirable that the diameter of the first mass portion 19 is equal to or larger than the diameter of the motor shaft 12.

  The second mass parts 20A, 20B, 20C, and 20D are preferably substantially fan-shaped. In other words, the second mass parts 20A, 20B, 20C, and 20D have a shape obtained by dividing a disk having a center portion rounded in a radial direction.

  The second mass parts 20A, 20B, 20C, and 20D are connected to the adjacent second mass parts 20A, 20B, 20C, and 20D by the elastic members 22 having the same elastic force, and are arranged at equal intervals.

  The second mass parts 20A, 20B, 20C, and 20D each have rolling contact means. The second mass portions 20A, 20B, 20C, and 20D are provided such that one or more insertion holes 23A and 23B do not penetrate from the direction of the first mass portion 19 in the circumferential direction. Compression springs 24A and 24B are inserted into the insertion holes 23A and 23B, respectively. Steel balls 25A and 25B are rotatably mounted between the compression springs 24A and 24B and the first mass portion 19. The compression springs 24 </ b> A and 24 </ b> B are urged toward the first mass portion 19 with the steel balls 25 </ b> A and 25 </ b> B.

  Wear resistant material members 26A and 26B are provided on the outer peripheral surfaces of the second mass parts 20A, 20B, 20C and 20D, that is, the surfaces facing the surfaces on which the steel balls 25A and 25B are installed.

  4 is a cross-sectional view of the flywheel 16 taken along line BB in FIG. As shown in FIG. 4, the flywheel 16 includes a first mass portion 19 at the center and a groove portion 21 that circulates around the first mass portion 19. The groove portion 21 slidably accommodates the second mass portions 20A, 20B, 20C, and 20D.

  The wear resistant members 26A, 26B provided in the second mass parts 20A, 20B, 20C, 20D are in sliding contact with the outer wall 28 of the groove part 21. The steel balls 25A and 25B are in sliding contact with the inner wall 27 of the groove 21.

  The contact pressure between the wear-resistant members 26A and 26B and the outer wall 28 and the contact pressure between the steel balls 25A and 25B and the inner wall 27 can be adjusted by changing the compression amount of the compression springs 24A and 24B or changing the spring constant. It is.

  FIG. 5 is an exploded plan view of the second mass parts 20A, 20B, 20C, and 20D. As shown in FIG. 5, compression springs 24A and 24B are inserted in the directions of arrows X into the insertion holes 23A and 23B, respectively. Steel balls 25A and 25B are rotatably mounted between the compression springs 24A and 24B and the first mass portion 19.

  FIG. 6 is a diagram illustrating the relationship between the rotation speed of the motor 11 and time in the first embodiment. In FIG. 6, the vertical axis 601 indicates the motor rotation speed, and the horizontal axis 602 indicates the time. A graph 605 is a graph showing the relationship between the rotational speed of the motor 11 and the time of the present embodiment.

  A graph 603 is a graph showing the relationship between the rotational speed of the motor 11 and time when only the first mass portion 19 contributes to the moment of inertia of the flywheel 16. A graph 604 is a graph showing the relationship between the rotation speed of the motor 11 and time when the first mass portion 19 and the second mass portions 20A, 20B, 20C, and 20D contribute to the moment of inertia of the flywheel 16.

  When the escalator 1 is operating, any one of the emergency stop buttons 7A and 7B, the skirt guard safety switches 8A and 8B, the inlet safety switches 9A and 9B, or the step abnormality detection switches 10A and 10B is abnormal at time t1. , And a signal indicating that an abnormality has been detected is transmitted to the control device 6.

  The control device 6 cuts off the power supply to the motor 11 and the electromagnetic brake 29. When the supply of electric power is cut off, the brake of the electromagnetic brake 29 is operated, and the motor shaft 12 is braked via the input shaft 14 and the coupling 13 of the speed reducer 15. At this time, the rotational speed of the motor 11 is influenced by the inertial force of the step or the like, the inertial moment of the rotating part of the driving device 3, etc., but is particularly affected by the inertial moment of the flywheel 16.

  Immediately after t1 when the brake of the electromagnetic brake 29 is activated and braking is started, the motor shaft 12 is still rotating at high speed. Therefore, the second mass parts 20A, 20B, 20C, and 20D of the flywheel 16 receive a large centrifugal force. This centrifugal force is proportional to the square of the rotational angular velocity.

  This centrifugal force acts on the outer wall 28 of the groove portion 21 of the first mass portion 19 via the wear resistant members 26A and 26B. Accordingly, the contact pressure between the wear-resistant members 26A and 26B and the outer wall 28 increases, and the frictional force between the wear-resistant members 26A and 26B and the outer wall 28 increases.

  When the frictional force between the wear-resistant members 26A, 26B and the outer wall 28 increases, the wear-resistant members 26A, 26B and the outer wall 28 do not slide, and the first mass portion 19 and the second mass portions 20A, 20B, 20C and 20D rotate together. Accordingly, the first mass portion 19 and the second mass portions 20A, 20B, 20C, and 20D contribute to the moment of inertia of the flywheel 16. That is, as shown in FIG. 6, the slope of the graph 605 immediately after the braking start time t <b> 1 substantially matches the slope of the graph 604.

  After the start of braking, the rotational speed of the motor 11 decreases with time. As the rotational speed of the motor 11 decreases, the centrifugal force acting on the second mass parts 20A, 20B, 20C, and 20D decreases rapidly. When the centrifugal force decreases, the contact pressure between the wear-resistant members 26A and 26B and the outer wall 28 rapidly decreases, so that the frictional force between the wear-resistant members 26A and 26B and the outer wall 28 rapidly decreases. Finally, slip occurs between the wear resistant members 26A, 26B and the outer wall 28.

  In addition, the steel balls 25A and 25B and the inner wall 27 of the groove portion 21 have a small frictional force because the steel balls 25A and 25B are in rolling contact with each other. Therefore, the first mass unit 19 and the second mass units 20A, 20B, 20C, and 20D slide relatively.

  That is, the first mass unit 19 integrated with the motor shaft 12 is decelerated by the brake, while the second mass units 20A, 20B, 20C, and 20D slip with the first mass unit 19. The inertial force causes idling at a rotational speed greater than that of the motor shaft 12 and does not contribute to the inertial moment of the flywheel 16.

  Therefore, as shown in FIG. 6, as the rotational speed of the motor shaft 12 decreases, only the first mass portion 19 contributes to the inertia moment of the flywheel 16, and the slope of the graph 605 is as shown in the graph 603. It almost coincides with the slope.

  When the second mass parts 20A, 20B, 20C, and 20D slide with the outer wall 28, the second mass parts 20A, 20B, 20C, and 20D are coupled by the elastic member 22, The mass parts 20A, 20B, 20C, and 20D do not collide with each other to generate noise.

  Further, the wear-resistant members 26A and 26B are made of a material that is resistant to wear. For example, a resin mold material or an alloy material can be used.

  As the alloy material, a metal (for example, a copper alloy, an aluminum alloy), an abrasive, and an alloy obtained by sintering a lubricant at a high temperature can be used.

  Resin mold materials include skeletal materials (eg, potassium titanate, metal fibers), lubricant materials (eg, coke, graphite, metal sulfide), abrasives (eg, metal oxides, minerals, metals), damping materials (rubber) ), A PH adjuster (an alkaline substance such as slaked lime), a filler (inexpensive powder), etc., baked and hardened with a resin (for example, a phenol resin) can be used.

  As described above, the passenger conveyor apparatus according to the present embodiment includes the fly hole 16 including the first mass portion 19 fixed to the motor shaft 12, and the flywheel 16 is provided around the first mass portion 19. A plurality of second mass parts 20A, 20B, 20C, and 20D having wear-resistant members 26A and 26B are accommodated inside the groove part 21. Therefore, when the motor 11 immediately after the start of braking is rotating at a high speed, the first mass portion 19 and the second mass portions 20A, 20B, 20C, and 20D contribute to the inertia moment of the flywheel 16 and slowly decelerate, The second mass portions 20A, 20B, 20C, and 20D do not contribute to the inertia moment of the flywheel 16 with time, and rapidly decelerate.

  Therefore, in the passenger conveyor device of the present embodiment, the deceleration that the passenger receives at the time of emergency stop is initially small and then increased. The passenger of the conveyor device feels anomaly at the first small deceleration received at the time of a sudden stop, and is ready for a fall, such as holding and grabbing the moving handrail 30. Can escape.

  Further, the passenger conveyor device of the present embodiment operates in the same manner as when the control device 6 issues a stop instruction even when the supply of electrical energy is interrupted due to a malfunction of the electrical system or a power failure, etc. There is an effect that can be prevented.

(Second Embodiment)
The passenger conveyor device of the present embodiment differs in that the flywheel 31 has a plurality of pin holes 36 and the second mass unit includes a pin drive unit 35 in addition to the passenger conveyor device of the first embodiment. The other configuration is the same as the configuration of the passenger conveyor device of the first embodiment.

  FIG. 7 is a front view of the flywheel 31 of this embodiment as viewed from the direction AA of FIG. As shown in FIG. 7, the flywheel 31 has a plurality of pin holes 36 provided in the outer wall 28 of the groove portion 21 so as to penetrate from the rotation center of the first mass portion 32 in the radial direction. For example, 24 pin holes 36 can be provided at 15 ° intervals when viewed from the rotation center of the first mass portion 32.

  Each of the second mass units 34A, 34B, 34C, and 34D has one or more pin driving units 35. The pin driving unit 35 is arranged at intervals of 90 ° when viewed from the rotation center of the first mass unit 32.

  8 is a cross-sectional view of the flywheel 31 taken along the line CC in FIG. FIG. 9 is an enlarged view of the pin driving unit 35. As shown in FIGS. 8 and 9, the second mass parts 34 </ b> A, 34 </ b> B, 34 </ b> C, 34 </ b> D have a space 37. The second mass portions 34A, 34B, 34C, and 34D are provided with pin insertion holes 39A from the space 37 toward the pin holes 36.

  The pin drive unit 35 includes a pin mass unit 38 provided so as to be slidable in the radial direction by centrifugal force, a pin 39 having one end fixed to the pin mass unit 38, and the pin mass unit 38 of the first mass unit 32. And a pin spring 40 which is an elastic body biased in the direction of the rotation center.

  The height H1 of the pin mass portion 38 is smaller than the height H2 of the space 37. The pin 39 is inserted into the pin insertion hole 39A. The length of the pin 39 is such that when the pin mass portion 38 is in contact with the inner wall 37A of the space 37, the tip of the pin 39 does not contact the outer wall 28 of the groove portion 21, and the pin mass portion 38 is located on the inner wall 37A of the space 37. When not in contact, the tip of the pin 39 is long enough to enter the pin hole 36 of the groove 21.

  When the second mass portions 34A, 34B, 34C, and 34D rotate, the pin 39 and the pin mass portion 38 receive a centrifugal force and move outward in the radial direction. When the pin mass part 38 moves radially outward, the tip of the pin 39 protrudes radially outward from the second mass part 34A, 34B, 34C, 34D.

  Here, the pin spring 40 is sufficiently strong to bring the pin 39 into contact with the inner wall 37A of the space 37 when the centrifugal force is not applied to the pin mass portion 38, and to store the pin 39 in the pin insertion hole 39A. When the centrifugal force is applied, the pin 39 is weak enough to enter the pin hole 36.

  Therefore, when a predetermined centrifugal force or more is applied to the pin mass part 38, the tip of the pin 39 enters the pin hole 36, and the second mass parts 34A, 34B, 34C, 34D rotate together with the first mass part 32.

  FIG. 10 is a diagram illustrating the relationship between the rotation speed of the motor 11 and time in the second embodiment. In FIG. 10, the vertical axis 701 indicates the motor rotation speed, and the horizontal axis 702 indicates time. A graph 705 is a graph showing the relationship between the rotation speed of the motor 11 and the time of the present embodiment.

  A graph 703 is a graph showing the relationship between the rotation speed of the motor 11 and time when only the first mass part 32 contributes to the moment of inertia of the flywheel 31. A graph 704 is a graph showing the relationship between the rotation speed of the motor 11 and time when the first mass portion 32 and the second mass portions 34A, 34B, 34C, and 34D contribute to the moment of inertia of the flywheel 31.

  When the escalator 1 is operating, any one of the emergency stop buttons 7A and 7B, the skirt guard safety switches 8A and 8B, the inlet safety switches 9A and 9B, or the step abnormality detection switches 10A and 10B is abnormal at time t1. , And a signal indicating that an abnormality has been detected is transmitted to the control device 6.

  The control device 6 cuts off the power supply to the motor 11 and the electromagnetic brake 29. When the supply of electric power is cut off, the brake of the electromagnetic brake 29 is operated, and the motor shaft 12 is braked via the input shaft 14 and the coupling 13 of the speed reducer 15.

  Immediately after the brake of the electromagnetic brake 29 is activated and braking is started, the motor 11 is still rotating at high speed. Since the second mass portion 34A, 34B, 34C, 34D of the flywheel 31 and the pin 39 and the pin mass portion 38 are subjected to a large centrifugal force, the pin mass portion 38 moves radially outward, and the pin 39 The pin hole 36 enters and engages.

  Accordingly, the first mass portion 32 and the second mass portions 34A, 34B, 34C, and 34D contribute to the moment of inertia of the flywheel 31. That is, as shown in FIG. 10, the slope of the graph 705 immediately after the braking start time t <b> 1 substantially matches the slope of the graph 704.

  After the start of braking, the rotational speed of the motor 11 decreases with time, and the centrifugal force acting on the second mass parts 34A, 34B, 34C, 34D decreases with the decrease in rotational speed. When the centrifugal force decreases, the centrifugal force acting on the pin 39 and the pin mass portion 38 decreases, and the pin 39 and the pin mass portion 38 move toward the center of the flywheel 31 by the elastic force of the pin spring 40.

  When the rotational speed of the motor 11 becomes a predetermined value or less, the pin 39 comes out of the pin hole 36 and is disengaged. When the engagement is released, only the first mass portion 32 contributes to the moment of inertia of the flywheel 31.

  Therefore, as shown in FIG. 10, when the rotational speed of the motor shaft 12 decreases to a predetermined value or less, the slope of the graph 705 comes to substantially coincide with the slope of the graph 703.

  As described above, in the passenger conveyor device of the present embodiment, the flywheel 31 has the pin hole 36 in the outer wall 28 of the groove portion 21, and the second mass portions 34A, 34B, 34C, and 34D each have a predetermined value or more. A pin 39 is further provided that engages with the pin hole 36 when a centrifugal force is applied.

  Therefore, when a predetermined centrifugal force or more is applied, the second mass portions 34A, 34B, 34C, and 34D can be more reliably contributed to the inertia moment of the flywheel 31, and the passenger can be more reliably fallen over. There is an effect that it can be prevented.

11: motor,
12: motor shaft,
16, 31: flywheel,
19, 32: first mass part,
20A, 20B, 20C, 20D, 34A, 34B, 34C, 34D: second mass part,
35: Pin drive unit,
36: Pin hole.

Claims (6)

A motor for supplying a driving force to a driving device that circulates and rotates a plurality of steps connected endlessly;
A flywheel having a first mass portion fixed to the motor shaft of the motor, and a groove provided so as to go around the first mass portion;
Rolling contact means that is slidably housed in the groove and is provided on a surface that faces the first mass portion, and an abrasion-resistant member that is provided on a surface that faces the surface on which the rolling contact means is provided. A plurality of second mass parts comprising:
A passenger conveyor device comprising: The second mass part is:
A pin mass part having a predetermined mass;
A pin whose one end is fixed to the pin mass part;
A space that penetrates from the rotation center of the first mass portion toward the radially outer side, has a pin insertion hole through which the pin is inserted, and slidably accommodates the pin mass portion;
A pin spring for urging the pin mass part toward the rotation center of the first mass part;
The passenger conveyor apparatus according to claim 1, further comprising: The pin spring is
When the centrifugal force is not applied to the pin mass part, the pin is strong enough to be accommodated in the pin insertion hole, and weak enough to enter the pin hole when a predetermined centrifugal force is applied. The passenger conveyor apparatus according to claim 2. The plurality of second mass parts are:
The passenger conveyor device according to any one of claims 1 to 3, wherein the passenger conveyor device is connected to an adjacent second mass portion by an elastic member. The first mass part is:
The passenger conveyor device according to any one of claims 1 to 4, wherein the passenger conveyor device has a diameter larger than that of the motor shaft. The rolling contact means
The passenger conveyor device according to any one of claims 1 to 5, wherein a surface facing the first mass portion is biased in a direction of the first mass portion by a spring.

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