JP4355326B2 - Passenger conveyor - Google Patents

Description

The present invention relates to passenger conveyors, especially with another handrail drive motor and drive source for driving the footstep, it is suitable for passenger conveyors such as escalators and moving walkways.

  As a technique related to handrail driving of a passenger conveyor, for example, there is a technique described in JP-A-7-149491 (Patent Document 1). The prior art disclosed in Patent Document 1 is a handrail drive device for a man conveyor that drives a handrail wound around a main frame by a plurality of sprockets and a plurality of drive rollers that are driven by a handrail drive unit via a handrail chain. A main frame includes a plurality of handrail drive units each including a drive unit, a speed reduction unit, a handrail chain, a plurality of sprockets, and a plurality of drive rollers.

JP 7-149491 A

  However, since the handrail chain is used in the prior art of Patent Document 1 to transmit the driving force from the speed reducing means constituting the handrail driving source to the driving roller, troublesome maintenance such as tension adjustment and lubrication is required. In addition, there is a problem that an expensive safety device for detecting breakage of the handrail chain is required. In addition, since the handrail drive source is installed at a deep position below the steps, it is necessary to remove the handrail at the time of maintenance of the handrail drive device, and the maintenance is extremely troublesome.

  An object of the present invention is to provide a passenger conveyor and a handrail driving device for the passenger conveyor that can improve maintainability and safety with a simple configuration.

In order to achieve the above-described object, the present invention provides a step that is circulated and driven, a driving source that drives the step, a handrail that is circulated and driven in synchronization with the step, and a handrail drive that drives the handrail. An apparatus, a balustrade that supports the handrail, a detachable skirt guard that closes a gap between the balustrade and the step, a detachable inner deck provided so as to cover an upper end surface of the skirt guard, In a passenger conveyor configured with an outer deck provided so as to cover the outer side of the balustrade, the handrail drive device is positioned in the vicinity of the drive roller and adjacent to the drive roller in the longitudinal direction above the handrail. a handrail drive motor provided separately from the drive source for driving the disposed and the footstep and, disposed adjacent to the side of the mounted and said drive roller to said handrail drive motor Speed means, a plurality of the driving rollers that are positioned on an upper surface of the bonded directly and the handrail to the reduction means, a plurality of driven rollers arranged to sandwich the handrail against the drive roller, wherein each follower A plurality of pressing springs that press the roller toward the handrail side, and the speed reduction means includes a plurality of worms coupled to an output shaft of the handrail drive motor and a plurality of worms disposed at meshing positions with the worms. Each of the worm wheels is disposed adjacent to each side of the opposite step with respect to each of the driving rollers, and is supported by the gear case. An output shaft of the handrail drive motor extends above each worm wheel, and the worm engages with each worm wheel. Disposed fit position is attached to an output shaft of the handrail drive motor, the handrail drive motor of the handrail driving device, the reduction means and the drive roller, the skirt guard, in said deck and said outer deck It is enclosed in the space which can be maintained facing the clearance gap between the lower end part of the balustrade and the step in the state where the skirt guard and the inner deck are removed.

Examples more preferred specific configuration definitive to the onset bright according it is as follows.
(1) The drive roller is positioned on an upper surface of a handrail portion extending substantially parallel to a portion exposed to the outside of the step, and a plurality of the drive rollers are disposed adjacent to a handrail longitudinal direction, and the handrail drive motor is driven by the drive disposed adjacent to the handrail longitudinally with respect to the roller, the worm wheel being disposed respectively adjacent laterally with respect to the respective driving rollers.
(2) In the above (1), a balustrade that supports the balustrade and a closing member that is detachably provided to close a gap between the balustrade and the step, and the handrail driving device removes the closing member Stored in a maintainable space facing the gap between the balustrade and the step in a closed state.
(3) In the above (2), the control unit drives the handrail so as to synchronize the speed of the step and the speed of the handrail based on the speed detected by the step speed detector and the handrail speed detector. Speed correction means for correcting the drive speed of the motor, and abnormality determination means for determining an abnormality of the handrail drive device based on the speed detected by the step speed detector and the handrail speed detector.
(4) In the above (3), when the difference in speed detected by the step speed detector and the handrail speed detector is greater than a first threshold and less than or equal to a second threshold, The abnormality determination unit is configured to correct a driving speed of the driving motor, and the abnormality determination unit includes a third difference in which a difference between the speeds detected by the step speed detector and the handrail speed detector is set to be larger than the second threshold value. The handrail driving device is judged to be abnormal when larger than the threshold value .

According to the passenger conveyors of the present invention, a simple structure, excellent in space-saving compact, it is possible to improve the maintainability and safety.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. The same reference numerals in the drawings of the respective embodiments indicate the same or equivalent.
(First embodiment)
A passenger conveyor and its handrail drive device according to a first embodiment of the present invention will be described with reference to FIGS.

  First, the overall configuration of the passenger conveyor 30 of the present embodiment will be described with reference to FIG. FIG. 1 is an explanatory perspective view of a passenger conveyor 30 according to the first embodiment of the present invention.

  The passenger conveyor 30 of the present embodiment is an example of an escalator, but the present invention can also be applied to a passenger conveyor such as a walking sidewalk. In the passenger conveyor 30, an upper sprocket (first sprocket) 1 is disposed on one side upper part of the installation site, and a lower sprocket (second sprocket) 2 is disposed on the other side lower part of the installation site. A step chain 3 is stretched between the sprockets 1 and 2, and the lower sprocket 2 is driven by the upper sprocket 1 being driven by the traveling drive source 5. The travel drive source 5 includes a travel drive motor as a main component.

  A step 4 is fastened to the step chain 3. The step 4 is installed so that a large number of individual steps 4A to 4Z are connected to each other to form a ring shape, and the upper half of the step 4 is always exposed. When the upper sprocket 1 is driven by the travel drive source 5, the step 4 is circulated and driven via the step chain 3.

  The handrail drive device 40 is an example of a handrail drive motor 9 that is disposed in the vicinity of the drive roller 11 and provided separately from the travel drive source 5 that drives the steps 4, and a speed reduction unit that is attached to the handrail drive motor 9. Handrail drive speed reducer 10, a plurality of drive rollers 11A to 11C directly coupled to handrail drive speed reducer 10, and a plurality of driven rollers 12A to 12A arranged with handrail 4 sandwiched between drive rollers 11A to 11C 12C and a plurality of pressing springs 13A to 13C that press the driven rollers 12A to 12C toward the handrail side. The handrail 6 is sandwiched between the driving rollers 11A to 11C and the driven rollers 12A, 12B, and 12C, and is driven by the rotation of the driving rollers 11A to 11C.

According to such a configuration, since it is not necessary to use a handrail chain as in the conventional case, a simple configuration is obtained, and troublesome maintenance such as tension adjustment and lubrication is unnecessary, and an expensive safety for detecting breakage of the handrail chain. Equipment is also unnecessary. Accordingly, it is possible to improve maintainability and safety. In other words, since it is possible to achieve mechanical synchronization between the plurality of handrail drive rollers and the drive source without using a transmission element, maintenance and safety are improved, and the handrail is configured with a simple configuration. It is possible to configure a handrail drive device for a passenger conveyor that drives the vehicle alone.

  Note that the pressing springs 13A to 13C have one end fixed to the frame fixing portion on the fixed side, and the other end applied pressing force to the driven rollers 12A to 12C.

  On both sides of the step 4, balustrades 7 extending along the step 4 are installed. The handrail 6 is formed of a flexible belt having a ring shape as a whole, and is supported by the balustrade 7. The lower portion of the handrail 6 extends substantially in parallel with the portion exposed to the outside of the step 4.

  The passenger conveyor 30 includes a step speed detector 8 that detects the speed at which the step 4 is driven, a handrail speed detector 14 that detects the speed of the handrail 6, and the speed detected by the step speed detector 8 and the handrail speed detector 14. And a control unit (not shown) for outputting and controlling a drive command for outputting a drive command to the handrail drive motor 9 of the handrail drive device 40 and the like.

  In FIG. 1, intermediate portions of the skirt guard 21, the inner deck 19, and the outer deck 20 are omitted, and the handrail driving device 40 is displayed. Further, in FIG. 1, a part of the step 4 and the step chain 3 is omitted, and the right balustrade 7 and the like are omitted.

  Next, the handrail drive device 40 will be specifically described with reference to FIGS. 2 is a schematic perspective view of the handrail driving device 40 in FIG. 1, and FIG. 3 is a cross-sectional view of an installation portion of the handrail driving device 40 in FIG.

  As shown in FIG. 2, the handrail drive speed reducer 10 includes a plurality of worms 16 </ b> A to 16 </ b> C coupled to the output shaft 15 of the handrail drive motor 9 and worm wheels disposed at meshing positions of the worms 16 </ b> A to 16 </ b> C. 17A-17C and the gear case 18 which accommodates these are provided.

  The driving rollers 11 </ b> A to 11 </ b> C are positioned on the upper surface of the handrail portion extending substantially parallel to the portion exposed to the outside of the step 4, and a plurality of drive rollers 11 </ b> A to 11 </ b> C are disposed adjacent to the longitudinal direction of the handrail. In this embodiment, it is comprised with the triple drive roller 11A-11C. The handrail drive motor 9 is disposed adjacent to the end drive roller 11A of the triple drive rollers 11A to 11C in the handrail longitudinal direction. The worm wheels 17 </ b> A to 17 </ b> C are respectively disposed adjacent to the side of the drive rollers 11 </ b> A to 11 </ b> C and are supported by the gear case 18. The output shaft 15 of the handrail drive motor 9 extends above the worm wheels 17A to 17C. The worms 16 </ b> A to 16 </ b> C are disposed at meshing positions with the worm wheels 17 </ b> A to 17 </ b> C and are attached to the output shaft 15 of the handrail drive motor 9.

  As shown in FIG. 3, in the vicinity of the balustrade 7 that supports the handrail 6, closing members 19 and 21 are provided that close the gap between the balustrade 7 and the step 4 and are detachable. The handrail driving device 40 is accommodated in a maintainable space facing the gap between the balustrade 7 and the step 4 with the closing members 19 and 21 removed. Specifically, in the periphery of the balustrade 7 that supports the handrail 6, a removable skirt guard 21 that closes a gap between the balustrade 7 and the step 4, and an attachment / detachment provided so as to cover the upper end surface of the skirt guard 21. A possible inner deck 19 and an outer deck 20 provided so as to cover the outside of the balustrade 7 are provided, and the handrail driving device 40 is stored in a space surrounded by the skirt guard 21, the inner deck 19 and the outer deck 20. Are arranged.

  According to such a configuration, the handrail drive device 40 can be made compact and excellent in space saving, can be inexpensive and can eliminate restrictions on the installation location, and can be a closure member such as the inner deck 19 and the skirt guard 21. Since the handrail drive device 40 can be maintained from the outside simply by removing it, maintainability can be significantly improved.

  In this embodiment, the three worm speed reduction means are used. For example, the first driving roller 11A is driven by the worm speed reduction means, and the driving force obtained by the first speed reduction means is used as a spur gear via an idler gear. Therefore, the second and third drive rollers 11B and 11C may be transmitted.

  Next, the control operation of the passenger conveyor 30 will be described with reference to FIG. FIG. 4 is a control flow diagram of the passenger conveyor 30 in FIG.

In the control unit, (step S1) with receiving the output signal Vs from the step speed detector 8 receives the output signal V _H from the handrail speed detector 14 (step S2). Next, a speed difference between the step speed and the handrail speed is calculated, and it is determined whether the speed difference is within the first threshold value δ ₁ (%) (step S3). Here, the output when the speed difference is the first threshold value [delta] _{1 (%)} within a, the rotational speed of the handrail drive motor 9 corresponding to the handrail speed of the resultant current as a command value omega _HO follows steps ( The process proceeds to step S4) and step S9.

If it is determined in step S3 that the speed difference exceeds the first threshold δ ₁ (%), it is determined whether the speed difference is within the second threshold δ ₂ (%) (step S5). Here, if the speed difference exceeds the first threshold value δ ₁ (%) and is within the second threshold value δ ₂ (%), the rotational speed calculated by the equation (1) is output as a command value. (Step S6), the process proceeds to Step S9.

  If it is determined in step S5 that the speed difference exceeds the second threshold value δ2 (%), the handrail drive motor 9 or the handrail speed detector 14 may be broken, or the drive rollers 11A to 11C may slip due to overload. Since it is considered, the process proceeds to step S7 and the elapsed time is counted. When this situation continues for a long time, it is determined that a failure / abnormality has occurred, the passenger conveyor 30 is stopped, and a notification is issued to the maintenance company (step S8). If it is determined in step S7 that the time exceeding the second threshold δ2 (%) is shorter than the predetermined time T (seconds), the process proceeds to step S6.

In step S9, compares the handrail driving speed V _HO calculated rotational speed of the step velocity V _SO and handrail drive motor 9 which is calculated from the step drive speed command value omega _SO follows step from the command value omega _HO follows step To do. Here, the speed difference is equal to a third threshold .delta.3 (%) or less, and outputs a rotation command value omega _HO handrail drive motor 9 in the next step (step S10).

  If it is determined in step S9 that the speed difference exceeds the third threshold value δ3 (%), it is determined that the control unit itself has failed, and the passenger conveyor 30 is stopped and a notification is issued to the maintenance company.

ω _HO = ω _O + (V _H −V _S ) / R (1)
Here, ω _O is the rotational speed command value to the stationary handrail drive device, and R is the drive roller radius.
( Reference example )
Next, a passenger conveyor and a handrail drive device of a reference example will be described with reference to FIG. FIG. 5 is a longitudinal sectional view of the handrail drive device 40 in the passenger conveyor of the reference example . This reference example is different from the first embodiment in the points described below, and the other points are basically the same as those in the first embodiment, and therefore, redundant description is omitted.

In this reference example , the handrail drive speed reducer 10 is incorporated as a boss portion of the drive roller 6, and the handrail drive speed reducer 10 and the drive roller 6 and the handrail drive motor 9 are arranged in parallel in the width direction of the passenger conveyor 30. is there. The handrail drive motor 9 is disposed above a handrail portion extending substantially parallel to a portion exposed to the outside of the step 4 and is configured by a flat motor. Accordingly, the handrail drive speed reducer 10 and the drive roller 6 are also disposed above the handrail portion extending substantially parallel to the portion exposed to the outside of the step 4.

Specifically, a sun gear 22 is provided around the output shaft 15 of the handrail drive motor 9, and a planetary gear 23 is provided around the output shaft 15 so as to mesh with the sun gear 22, and an internal gear so as to mesh with the planetary gear 23. 24 is provided. Furthermore, in the reference example , the planetary gear 23 is configured to freely rotate on the planetary gear bracket 25 installed on the fixed portion of the passenger conveyor 30. A rubber member 26 is bonded to the outer periphery of the internal gear 24.

  The effect obtained by adopting such a configuration is that the width of the drive roller 6 can be utilized for the space of the handrail drive speed reducer 10, so that an increase in the width direction dimension can be suppressed, which is the same as the first embodiment. Since no driving force transmission element is used, safety and maintainability can be improved.

In the reference example , the sun gear 22 and the output shaft 15 of the handrail drive motor 9 are coupled, the planetary gear 23 is rotated, and the internal gear 24 is rotated. However, it is generally known that the planetary gear speed reducer has various speed reduction methods depending on the driving patterns of the three gears that are constituent elements. The feature of the reference example is that it is utilized as a boss part of the drive roller 6 taking advantage of the space-saving configuration of the planetary gear speed reducer, and the adoption of various reduction methods relating to the drive pattern is not limited. .

It is an explanation perspective view of a passenger conveyor of a 1st embodiment of the present invention. FIG. 2 is a schematic perspective view of the handrail driving device in FIG. 1. It is sectional drawing of the installation part of the handrail drive device in FIG. It is a control flow figure of the passenger conveyor in FIG. It is a longitudinal cross-sectional view of the handrail drive device in the passenger conveyor of a reference example .

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Upper sprocket, 2 ... Lower sprocket, 3 ... Step chain, 4 ... Step, 4A-4Z ... Individual step, 5 ... Traveling drive source, 6 ... Handrail, 7 ... Railing, 8 ... Step speed detector, 9A-9C ... handrail drive motor, 10 ... handrail drive speed reducer (deceleration means), 11A to 11C ... drive roller, 12A to 12C ... driven roller, 13A to 13B ... pressing spring, 14 ... handrail speed detector, 15 ... output shaft, 16 ... Worm, 17 ... Worm wheel, 18 ... Gear case, 19 ... Inner deck, 20 ... Outer deck, 21 ... Skirt guard, 22 ... Sun gear, 23 ... Planetary gear, 24 ... Internal gear, 25 ... Planetary gear bracket, 26 ... rubber member, 30 ... passenger conveyor, 40 ... handrail drive device.

Claims (5)

A step that is driven by circulation;
A travel drive source for driving the steps;
A handrail that is circulated and driven in synchronization with the steps;
A handrail driving device for driving the handrail;
A balustrade supporting the handrail,
A removable skirt guard that closes a gap between the balustrade and the step;
A removable inner deck provided to cover the upper end surface of the skirt guard;
In the passenger conveyor composed of an outer deck provided to cover the outside of the balustrade,
The handrail drive device is disposed in the vicinity of the drive roller, adjacent to the drive roller in the longitudinal direction and positioned above the handrail, and provided separately from the travel drive source that drives the steps. A drive motor, a speed reduction means attached to the handrail drive motor and disposed adjacent to a side of the drive roller, and a plurality of the drive rollers directly coupled to the speed reduction means and positioned on the upper surface of the handrail And a plurality of driven rollers arranged with the handrail sandwiched between the drive rollers, and a plurality of pressing springs that press the driven rollers toward the handrail side,
The speed reducer includes a plurality of worms coupled to an output shaft of the handrail drive motor, a plurality of worm wheels arranged at meshing positions with the worms, and a gear case that houses the worm and the worm wheel. Prepared,
Each of the worm wheels is disposed adjacent to the side counter-step side with respect to each of the driving rollers, and is supported by the gear case.
The output shaft of the handrail drive motor extends above each worm wheel,
The worm is disposed at a meshing position with each worm wheel and is attached to an output shaft of the handrail drive motor,
The balustrade drive motor, the speed reduction means, and the drive roller of the handrail drive device are surrounded by the skirt guard, the inner deck, and the outer deck, and the lower end of the balustrade with the skirt guard and the inner deck removed. The passenger conveyor is housed in a maintainable space facing a gap between a section and the step. In Claim 1, the said driving roller is located in the upper surface of the handrail part extended substantially parallel to the part exposed to the exterior of the said step, and a plurality is arranged adjacent to the handrail longitudinal direction, and the handrail drive motor is Passenger conveyor characterized in that it is arranged adjacent to the drive roller in the longitudinal direction of the handrail, and the worm wheel is arranged adjacent to each drive roller laterally.   In Claim 1, Based on the step speed detector which detects the speed which drives the step, the handrail speed detector which detects the speed of the handrail, the speed detected by the step speed detector and the handrail speed detector And a control section for controlling the handrail drive motor.   4. The driving speed of the handrail drive motor according to claim 3, wherein the control unit synchronizes the speed of the step and the speed of the handrail based on the speed detected by the step speed detector and the handrail speed detector. Passenger conveyor, comprising: a speed correcting means for correcting an error; and an abnormality determining means for determining an abnormality of the handrail driving device based on the speed detected by the step speed detector and the handrail speed detector. .   5. The speed correction means according to claim 4, wherein the speed control means drives the handrail drive motor when the difference in speed detected by the step speed detector and the handrail speed detector is greater than a first threshold value and less than or equal to a second threshold value. When the speed difference is detected and the difference between the speeds detected by the step speed detector and the handrail speed detector is larger than a third threshold set larger than the second threshold. In addition, the passenger conveyor is characterized in that the handrail driving device is determined to be abnormal.

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