JP6461283B1 - Passenger conveyor - Google Patents

Abstract

A passenger conveyor capable of controlling the pressing force applied to a handrail belt by a handrail driven wheel in accordance with a change in traveling speed.
SOLUTION: A handrail driving wheel 72 that drives a handrail belt 38 in synchronization with a step 30, and a plurality of handrail driven wheels 74 that are arranged on the outer periphery of the handrail driving wheel 72 and press the handrail belt 38 against the handrail driving wheel 72. For some handrail driven wheels 74, the handrail belt 38 is pressed against the handrail drive wheel 72 from a non-pressed state, or a pressing member 70 that changes from a pressed state to a non-pressed state, and at a low speed, the handrail belt A controller 50 that reduces the number of handrail driven wheels 74 that press 38 against the handrail drive wheel 72 by the pressing member 70 less than the number of handrail driven wheels 74 that press the handrail belt 38 against the handrail drive wheel 72 at normal speed; Have
[Selection] Figure 2

Description

  Embodiments of the present invention relate to passenger conveyors.

  A handrail belt of a passenger conveyor such as an escalator or a moving sidewalk is driven by a handrail driving device. The handrail driving device is provided with a handrail driving wheel for driving a handrail belt and a handrail driven wheel. The handrail driving wheel is rotated by the driving force of the driving device that drives the step being transmitted through the chain, and the handrail driven wheel is disposed on the arc just below the handrail driving wheel. The handrail belt is pressed against the handrail driving wheel and the handrail driven wheel, and a frictional force is generated at a contact portion between the handrail driving wheel and the handrail belt and between the handrail driven wheel and the handrail belt, thereby driving the handrail belt.

JP 2013-220888 A JP 2009-149411 A

  As described above, the handrail belt is pressed and driven by the handrail driving wheel and the handrail driven wheel of the handrail driving device. Therefore, regardless of normal operation or low speed operation, all handrail drive wheels and all handrail driven wheels are always pressed against the handrail belt.

  However, it is conceivable that the required frictional force for lower speed operation is lower than that for normal operation. At that time, there are many contact surfaces between the handrail driving wheel and the handrail belt, and the handrail driven wheel and the handrail belt, so that there is a problem that an indentation is generated in the handrail belt and further a running resistance is generated.

  Therefore, in view of the above problems, an embodiment of the present invention aims to provide a passenger conveyor that can control the pressing force applied to the handrail belt by the handrail driven wheel in accordance with a change in traveling speed.

An embodiment of the present invention includes a truss, a plurality of steps disposed on the truss and connected endlessly, a handrail belt, driving means for causing the step to travel at a predetermined traveling speed, and the handrail belt A handrail drive wheel that drives the handrail drive wheel in synchronization with the step, a plurality of handrail driven wheels that are arranged on an outer periphery of the handrail drive wheel and press the handrail belt against the handrail drive wheel, and at least a part of the handrail driven wheel With regard to the handrail belt, the handrail belt is pressed against the handrail drive wheel from the non-pressed state, or the pressure adjusting means for changing the pressed state from the pressed state to the non-pressed state, and when the travel speed is lower than the normal speed, the handrail The number of the handrail driven wheels that press the belt against the handrail drive wheel is determined by the pressure adjusting means from the number of the handrail driven wheels that press the handrail belt against the handrail drive wheel at the normal speed. Has a small control unit, and then, the rotation axes of the handrail driven wheel are formed respectively connected to by a chain-shaped pressing member by a ring, one end portion of the pressing member is fixed to the truss, The other end portion of the pressing member is fixed to the truss via the pressing adjusting means, and the control means presses the handrail belt at the normal speed against the handrail driving wheel with all the handrail driven wheels. Then, the handrail belt at the time of the low speed is controlled by the pressing adjusting means so as to press the handrail driving wheel with a part of the handrail driven wheel.

The side explanatory drawing of the whole escalator of Embodiment 1. FIG. The side view which showed the pressing state to the handrail belt by the pressing member of normal driving | operation. The side view which showed the pressing state to the handrail belt by the pressing member of low speed driving | operation. The bottom view of a press member. Block diagram of the escalator. The side view which showed the press state to the handrail belt by the pressing member of normal operation of Embodiment 2. FIG.

  Hereinafter, the escalator 10 which is a passenger conveyor of one Embodiment of this invention is demonstrated with reference to drawings.

Embodiment 1

  The escalator 10 of Embodiment 1 is demonstrated with reference to FIGS. 2, 3, 4, and 6, other articles such as the step 30 are omitted for easy understanding of the mechanism.

(1) Escalator 10
The structure of the escalator 10 will be described with reference to FIGS. FIG. 1 is an explanatory view of the escalator 10 as seen from the side.

  As shown in FIG. 1, a truss 12 that is a framework of the escalator 10 is supported using support angles 2 and 3 across the upper floor and the lower floor of the building 1.

  As shown in FIG. 1, in the upper floor side machine room 14 at the upper end of the truss 12, there are a drive unit 18 for driving the step 30, a pair of left and right drive sprockets 24, 24, a pair of left and right handrail sprockets 27, 27, a pair of left and right handrail drive wheels 72, 72 are provided. The drive device 18 stops the rotation of the motor (induction motor) 20, the reduction gear, the output sprocket attached to the output shaft of the reduction gear, the drive chain 22 driven by the output sprocket, and the motor 20. And a disc brake for holding the stopped state. The drive sprocket 24 is rotated by the drive chain 22. The pair of left and right drive sprockets 24 and 24 and the handrail sprocket 27 are connected by a connecting belt 19 (see FIGS. 2 and 3) and rotate synchronously. The handrail sprocket 27 is provided with a pair of left and right handrail drive wheels 72 coaxially. A control unit 50 for controlling the motor 20, the disc brake, and the like is provided in the machine room 14 on the upper floor side.

  As shown in FIG. 1, a driven sprocket 26 is provided inside the lower floor machine room 16 at the lower end of the truss 12. Between the driving sprocket 24 on the upper floor side and the driven sprocket 26 on the lower floor side, a pair of left and right endless step chains 28, 28 are suspended. That is, the wheels 301 of the plurality of steps 30 are attached to the pair of left and right step chains 28 and 28 in an endless manner at equal intervals. The wheel 301 of the step 30 travels along a guide rail (not shown) fixed to the truss 12 and engages with a recess in the outer peripheral portion of the drive sprocket 24 and a recess in the outer peripheral portion of the driven sprocket 26 to move up and down. Invert. The wheels 302 travel on the guide rail 25 fixed to the truss 12.

  As shown in FIG. 1, a pair of left and right skirt guards 44, 44 and a pair of left and right balustrades 36, 36 are erected on the left and right sides of the truss 12. A handrail rail 39 is provided above the balustrade 36, and the handrail belt 38 moves along the handrail rail 39. A front skirt guard 40 on the upper floor side is provided in the lower front part on the upper floor side of the balustrade 36, and a front skirt guard 42 on the lower floor side is provided in the lower front part on the lower floor side. Inlet portions 46 and 48, which are the entrances and exits of the handrail belt 38, respectively protrude. The skirt guard 44 is provided at the lower side of the balustrade 36, and the step 30 runs between the pair of left and right skirt guards 44, 44. Operation panels 52 and 56 and speakers 54 and 58 are provided on the inner side surfaces of the skirt guards 44 on the upper and lower floors, respectively.

  As shown in FIG. 1, the handrail belt 38 enters the front skirt guard 40 from the inlet portion 46 on the upper floor side, is passed through the guide roller 68 of the guide roller group 64 and is handed over the handrail drive wheel 72, and then It moves in the skirt guard 44 through the guide roller group 66 and appears outside the front skirt guard 42 from the inlet 48 on the lower floor side. Then, when the handrail sprocket 27 is rotated together with the drive sprocket 24 by the connecting belt 19 shown in FIGS. 2 and 3, the handrail drive wheel 72 is rotated, and the handrail belt 38 is moved in synchronization with the step 30. Further, a pressing member 70 for pressing the handrail belt 38 against the rotating handrail driving wheel 72 is provided. The pressing member 70 will be described later.

  As shown in FIG. 1, a boarding board 32 on the upper floor side is provided horizontally at the entrance / exit on the ceiling surface of the machine room 14 on the upper floor side. A lower floor boarding board 34 is provided horizontally at the mouth. A comb-like comb 60 is provided at the front end of the boarding / alighting plate 32, and the step 30 advances or enters from this comb 60. A comb-like comb 62 is also provided on the boarding / alighting plate 34.

(2) Handrail drive wheel 72 and pressing member 70
First, the mounting structure of the pair of left and right handrail drive wheels 72 will be described with reference to FIGS. The pair of left and right handrail drive wheels 72 are coaxially attached by a handrail sprocket 27 and a rotation shaft 29, and the rotation shaft 29 is horizontally supported by a pair of left and right bearings 33 and 33. The pair of left and right bearings 33 and 33 are fixed to a frame member 13 fixed horizontally to the truss 12.

  Next, the structure of the pressing member 70 provided below the handrail drive wheel 72 will be described with reference to FIGS. The pressing member 70 has a chain structure in which the rotation shafts 76 of the eight handrail driven wheels 74 are sandwiched and connected from left and right by plate-like links 78 as shown in FIG.

  One end of the pressing member 70, that is, the link 78 a at the leftmost end in FIGS. 2 and 3 is fixed to a frame material (not shown) of the truss 12 using the first fixing member 80.

  A support member 82 is provided at the other end of the pressing member 70, that is, the link 78b at the rightmost end in FIGS. A screw rod 84 protrudes from the support member 82.

  In the axial direction of the screw rod 84, first, a receiving portion 86 is screwed, then an air spring 96, then a second fixing member 88 is arranged, and then a spring spring 90 is arranged. The adjustment plate 92 is disposed at the most distal end, and a nut 94 is screwed onto the screw rod 84 on the outside of the adjustment plate 92.

  The second fixing member 88 is fixed to a frame material (not shown) of the truss 12.

  The spring spring 90 accommodates the screw rod 84 and is disposed between the first fixing member 80 and the adjustment plate 92, and urges the adjustment plate 92 and the screw rod 84 upward in FIGS. This urging force is adjusted by the nut 94.

  The air spring 96 is a bellows type, houses the screw rod 84, and adjusts the urging force of the receiving portion 86 and the screw rod 84. The air supply / exhaust unit 98 shown in FIG. 5 supplies air to the air spring 96 and exhausts it, whereby the air spring 96 expands and contracts. The supply / exhaust unit 98 has a pump and an exhaust valve, supplies air to the air spring 96 by the pump, and exhausts air from the air spring 96 by opening the exhaust valve.

  2 and 3, eight handrail driven wheels 74 are connected by a link 78, and five pieces from the first fixing member 80 to the position of the lowermost end sandwiching the position of the lowermost end portion of the handrail driving wheel 72. Handrail driven wheels 74 are provided, and three handrail driven wheels 74 are provided from the position of the lowermost end to the position of the second fixing member 88. Among these, the five handrail driven wheels 74 from the first fixing member 80 are arranged at positions where the handrail belt 38 is always pressed against the handrail driving wheel 72.

  When the air from the air spring 96 is exhausted, the link 78 of the handrail driven wheel 74 is pulled by the urging force of the spring spring 90, and the three handrail driven wheels 74 move the handrail belt 38 as shown in FIG. Press against the handrail drive wheel 72.

  When air is supplied to the air spring 96, as shown in FIG. 3, the link 78 of the handrail driven wheel 74 is pushed, and the three handrail driven wheels 74 are separated from the handrail belt 38 and become non-pressed. .

(3) Electrical Configuration of Escalator 10 Next, the electrical configuration of the escalator 10 will be described based on the block diagram of FIG.

  The motor 20 made of an induction motor is a three-phase motor, and the rotation direction and the rotation speed can be controlled by the inverter circuit 21.

  The control unit 50 is connected to the inverter circuit 21, operation panels 52 and 56, speakers 54 and 58, and an air supply / exhaust unit 98. Further, a current detector 23 for detecting a drive current supplied from the inverter circuit 21 to the motor 20 is also connected.

(4) Press adjustment method of the pressing member 70 Next, the press adjustment method of the pressing member 70 is demonstrated.

  First, in low speed driving where no passenger is on the escalator 10, an instruction signal is received from the control unit 50, and the air supply / exhaust unit 98 supplies air to the air spring 96, as shown in FIG. The air spring 96 is extended. As a result, as shown in FIG. 3, the three handrail driven wheels 74 are separated from the handrail belt 38 and are not pressed.

  Next, when a passenger gets on the escalator 10, the drive current from the current detection unit 23 increases, and the control unit 50 accelerates the operation speed of the motor 20 from a low speed to a normal speed. Further, at this time, the control unit 50 exhausts the air from the air spring 96 and causes the air spring 96 to contract as shown in FIG. Accordingly, as shown in FIG. 2, all the handrail driven wheels 74 press the handrail belt 38, and the handrail belt 38 can be reliably driven even if the number of passengers increases.

  Next, in normal operation, when the drive current from the current detection unit 23 decreases, the control unit 50 determines that there are no passengers on the escalator 10 and decelerates from the normal speed to the low speed. At the same time, the control unit 50 supplies air to the air spring 96 by the air supply / exhaust unit 98 and releases the pressing of the handrail belt 38 by the three handrail driven wheels 74 as shown in FIG. As a result, the running resistance of the handrail belt 38 and the handrail drive wheel 72 is reduced.

(5) Effect According to the present embodiment, the traveling resistance generated between the handrail belt 38 and the handrail driven wheel 74 is reduced by partly separating the handrail driven wheel 74 from the handrail belt 38 during low speed operation. Therefore, the life extension of the handrail driven wheel 74 and the indentation on the handrail belt 38 by the handrail driven wheel 74 can be reduced.

  Further, since the handrail belt 38 is pressed by all the handrail driven wheels 74 in the normal operation, the driving force of the handrail belt 38 can be moved in synchronization with the step 30 without being weakened even when a passenger is riding.

Embodiment 2

  Next, the escalator 10 of Embodiment 2 is demonstrated with reference to FIG.

  The difference between the present embodiment and the first embodiment is that the air spring 96 is provided as the pressure adjusting means in the first embodiment, but the electromagnetic coil 99 is used in the present embodiment. The electromagnetic coil 99 is connected to the control unit 50.

  One end of the pressing member 70, that is, the link 78 a at the leftmost end in FIG. 6 is fixed to a frame material (not shown) of the truss 12 using the first fixing member 80.

  A support member 82 is provided at the other end of the pressing member 70, that is, the link 78b at the rightmost end in FIG. A screw rod 84 protrudes from the support member 82.

  Along the axial direction of the screw rod 84, first, a second fixing member 88 is arranged, followed by a receiving portion 86, followed by a spring spring 90, and an adjustment plate at the most distal end portion. 92, and a nut 94 is screwed onto the screw rod 84 on the outside of the adjustment plate 92.

  The second fixing member 88 is fixed to a frame material (not shown) of the truss 12, and an electromagnetic coil 99 is provided.

  The spring spring 90 accommodates the screw rod 84 and is disposed between the receiving portions 86, and urges the adjustment plate 92 and the screw rod 84 upward in FIG. This urging force is adjusted by the nut 94.

  The electromagnetic coil 99 is fixed to the second fixing member 88 and gives a repulsive force to the receiving portion 86 by a magnetic force when excited. Therefore, the receiving portion 86 has the same polarity as the magnetic force of the electromagnetic coil 99. When the excitation is increased, the receiving portion 86 is pressed against the urging force of the spring spring 90, and the link 78 of the handrail driven wheel 74 is pressed. The handrail driven wheel 74 leaves. On the contrary, when the excitation of the electromagnetic coil 99 is weakened, the link 78 of the handrail driven wheel 74 is pulled by the urging force of the spring spring 90, and the handrail driven wheel 74 presses the handrail belt 38.

  Next, a control method will be described. In low-speed driving where passengers do not ride, the control unit 50 increases the excitation of the electromagnetic coil 99. As a result, the link 78 of the handrail driven wheel 74 is pushed, and a part of the handrail driven wheel 74 is separated from the handrail belt 38.

  Next, in this low-speed operation, when the drive current detected by the current detection unit 23 increases and the control unit 50 detects a passenger, the control unit 50 accelerates from a low speed to a normal speed. At the same time, the control unit 50 weakens the excitation of the electromagnetic coil 99. As a result, the link 78 of the handrail driven wheel 74 is pulled, and all the handrail driven wheels 74 are pressed against the handrail belt 38.

  Next, when there are no passengers in normal operation and the drive current decreases, the control unit 50 increases the excitation of the electromagnetic coil 99. As a result, the link 78 of the handrail driven wheel 74 is pushed, and the handrail driven wheel 74 is separated from the handrail belt 38.

  According to the present embodiment, a part of the handrail driven wheel 74 is separated from the handrail belt 38 during low speed operation, so that the running resistance generated between the handrail belt 38 and the handrail driven wheel 74 is reduced. Further, the life of the handrail driven wheel 74 can be prolonged, and the dirt and indentation on the handrail belt 38 by the handrail driven wheel 74 can be reduced.

  Further, since the handrail belt 38 is pressed by all the handrail driven wheels 74 in the normal operation, the driving force of the handrail belt 38 can be moved in synchronization with the step 30 without being weakened even when a passenger is riding.

Example of change

  In the above embodiment, there are three handrail driven wheels 74 that are released at a low speed, but the number is not limited to this, and other numbers may be used.

  Moreover, in the said embodiment, although demonstrated applying to the escalator 10, you may replace with this and may apply to the moving sidewalk.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Escalator, 20 ... Motor, 27 ... Handrail sprocket, 30 ... Step, 21 ... Inverter circuit, 23 ... Current detection part, 70 ... Pressing member, 72 ... Handrail drive wheel, 74 ... handrail driven wheel, 76 ... rotary shaft, 78 ... link, 96 ... air spring

Claims (8)

A truss,
A plurality of steps arranged on the truss and connected endlessly;
A handrail belt,
Drive means for traveling the step at a predetermined traveling speed;
A handrail drive wheel for driving the handrail belt in synchronization with the steps;
A plurality of handrail driven wheels arranged on an outer periphery of the handrail drive wheel and pressing the handrail belt against the handrail drive wheel;
With respect to at least a part of the handrail driven wheel, a pressure adjusting unit that changes the handrail belt to the handrail driving wheel from a non-pressed state to a pressed state, or from a pressed state to a non-pressed state;
When the travel speed is a low speed lower than the normal speed, the number of the handrail driven wheels that press the handrail belt against the handrail drive wheel is pressed, and the handrail belt at the normal speed is pressed against the handrail drive wheel. Control means for reducing the number of the handrail driven wheels by the pressure adjusting means,
I have a,
The rotation shafts of the plurality of handrail driven wheels are respectively connected by a ring to form a chain-shaped pressing member,
One end of the pressing member is fixed to the truss,
The other end of the pressing member is fixed to the truss via the pressing adjustment means,
The control means presses the handrail belt at the normal speed against the handrail drive wheel by all the handrail driven wheels, and the handrail belt at a part of the handrail driven wheel at the low speed. Controlled by the pressure adjusting means to press against the drive wheel,
Passenger conveyor. The other end of the pressing member is biased by a spring spring in a direction in which the handrail driven wheel presses the handrail belt against the handrail driving wheel.
The passenger conveyor according to claim 1 . The pressure adjusting means is a bellows type air spring, and adjusts a force for urging the other end portion of the pressing member in the pressing direction according to a stretched state of the air spring.
The passenger conveyor according to claim 2 . The control means, when accelerating from the low speed to the normal speed, exhausts air from the air spring to reduce the pressure, and presses the handrail driven wheel against the handrail belt,
The passenger conveyor according to claim 3 . When the control means decelerates from the normal speed to the low speed, the air spring is supplied with air and extended to release the handrail driven wheel from the handrail belt,
The passenger conveyor according to claim 3 or 4 . The pressing adjusting means is an electromagnetic coil, and adjusts a force for biasing the other end portion of the pressing member in the pressing direction according to an excitation state of the electromagnetic coil.
The passenger conveyor according to claim 2 . The control means weakens the excitation of the electromagnetic coil and presses the handrail driven wheel against the handrail belt when accelerating from the low speed to the normal speed.
The passenger conveyor according to claim 6 . The control means strengthens excitation of the electromagnetic coil when decelerating from the normal speed to the low speed, and separates the handrail driven wheel from the handrail belt.
The passenger conveyor according to claim 7 .

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