JP2006111380A - Drive unit for passenger conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drive unit for a passenger conveyor, capable of saving space for occupied area, achieving compactness of brakes, and achieving light weight of a rotary disc. <P>SOLUTION: This drive unit is provided with a reducer input shaft 23 provided on a drive motor 16 to be rotated at first speed, on which a high speed stage pinion 23B is installed, a reducer intermediate shaft 22 to be rotated at second speed lower than the first speed, on which a high speed stage gear wheel 22A to be engaged with the high speed stage small gear 23B and a low speed stage pinion 22B are installed, a reducer output shaft 21 to be rotated at third speed lower than the second speed, on which a low speed stage gear wheel 21A to be engaged with the low speed stage pinion 22B and an output sprocket 14 are installed, and of which center is disposed to an extended center of the reducer input shaft 23, and an idle shaft 24 rotated through a second high speed stage pinion 24B to be engaged with the high speed stage gear wheel 22A. The reducer input shaft 23, the reducer intermediate shaft 22, and the idle shaft 24 are disposed in the same plane along the vertical direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a drive device for a passenger conveyor, and more particularly to the structure of a speed reducer that decelerates the rotation of a drive motor that applies drive force to a footboard and a moving handrail.

  Generally, a drive device for a passenger conveyor is composed of a drive motor, a speed reducer composed of a plurality of gear trains, a brake, a rotating disk, a speed detector, a chain, a sprocket, and the like, and the rotation of the drive motor is decelerated by these power transmission elements. And the tread board which carries a passenger is driven.

  In recent years, the number of cases in which passenger conveyors are additionally introduced for buildings and the like that do not consider the introduction of passenger conveyors at the beginning of construction has increased, and the demand for reduction in installation space for passenger conveyors has increased.

Conventionally, a gear shaft that rotates at the third lowest speed is arranged on the gear shaft that rotates at the second lowest speed in order to reduce the space occupied by the drive device in the machine room. One having a drive motor on a reduction gear is known (for example, see Patent Document 1).
JP 2004-18123 A

  However, in the drive device described above, since the combination of the low speed large gear and the low speed small gear is arranged in the substantially same horizontal plane, the width dimension of the speed reducer is at least the low speed large gear diameter and the low speed small gear diameter. The thickness of the reduction gear box is added to the sum of the above, and the width cannot be further reduced.

  In addition, in the brake provided in the drive device, the braking force required to stop and hold the passenger conveyor has a characteristic that it decreases in proportion to the rotation speed of its mounting shaft. Since the brake is mounted not on the drive motor shaft but on the speed reducer input shaft, the rotation speed of the brake mount shaft is lower than that of the drive motor shaft, and the required braking force is increased. There was an increasing problem.

  Furthermore, in the case of a rotating disk that secures the moment of inertia for safely braking the passenger conveyor, if the outer diameter is the same, the weight of the rotating disk is reduced in proportion to the square of the rotational axis of the rotating disk. There is a characteristic that it can.

  The present invention has been made from the situation in the prior art described above. The purpose of the present invention is to reduce the size of the brake and reduce the weight of the rotating disk while reducing the installation area. It is to provide a driving device.

  In order to achieve the above-described object, the invention according to claim 1 of the present invention is provided between a drive motor that drives a tread and a moving handrail via an output sprocket, and between the output sprocket and the drive motor, A reduction device that reduces the rotational speed of the drive motor via a plurality of gear trains, a brake that brakes the rotation of the reduction device, a rotary disk that applies an inertia moment to the reduction device, and the reduction device are provided. In a passenger conveyor drive device comprising a speed detector for detecting the number of rotations, a reduction gear input shaft that is provided in the drive motor and rotates at a first speed and to which a high-speed step gear is mounted, and the first A speed reducer intermediate shaft that is rotated at a second speed lower than the speed and meshes with the high speed small gear and to which the low speed small gear is attached, and a second speed that is lower than the second speed. A low-speed large gear that rotates at a speed of 5 mm and meshes with the low-speed small gear and the output sprocket are mounted, and a speed reducer output shaft that is arranged at an extension of the center of the speed reducer input shaft, and the high speed An idler shaft that rotates through a second high-speed stepped gear that meshes with the stepped large gear is provided, and the speed reducer input shaft, the speed reducer intermediate shaft, and the idle shaft are arranged in the same plane along the vertical direction. It is configured.

  In the invention according to claim 1 of the present invention configured as described above, the center of the speed reducer output shaft is disposed as an extension of the center of the speed reducer input shaft, and the speed reducer input shaft, the speed reducer intermediate shaft, and the idle shaft are Since they are arranged on the same plane along the vertical direction, the approximate width dimension of the drive device can be the sum of the diameter of the low-speed large gear and the thickness dimension of the reduction gear box.

  According to a second aspect of the present invention, there is provided a drive motor for driving the step board and the moving handrail via the output sprocket, and provided between the output sprocket and the drive motor, via a plurality of gear trains. A speed reducer that decelerates the rotational speed of the drive motor, a brake that brakes the rotation of the speed reducer, a rotating disk that applies an inertia moment to the speed reducer, and a speed detection that is provided in the speed reducer and detects the rotational speed In the drive device for a passenger conveyor comprising a reducer, a reduction gear input shaft that is provided in the drive motor and rotates at a first speed and to which a high-speed step gear is mounted, and a second speed that is lower than the first speed. A speed reducer intermediate shaft to which a high-speed large gear and a low-speed small gear that are meshed with the high-speed small gear are attached, and a third speed that is lower than the second speed, Low A low-speed large gear that meshes with a step-down gear and the output sprocket are attached, and a second reduction gear that meshes with a high-speed large gear that has a center disposed at an extension of the center of the reduction gear input shaft. An idler shaft that rotates via a high-speed step gear is provided, and the speed reducer input shaft, the speed reducer intermediate shaft, and the idle shaft are arranged in the same plane along the horizontal direction.

  In the invention according to claim 2 of the present invention configured as described above, the center of the speed reducer output shaft is disposed as an extension of the center of the speed reducer input shaft, and the speed reducer input shaft, the speed reducer intermediate shaft, and the idle shaft are Since they are arranged on the same plane along the vertical direction, the approximate height dimension of the drive device can be the sum of the diameter of the low-speed large gear and the thickness dimension of the reduction gear box.

  Furthermore, in the invention according to claim 3 of the present invention, the number of teeth of the second high-speed step gear is set to be smaller than the number of teeth of the high-speed step gear, and the idle shaft becomes faster than the first speed. It is configured to rotate at the fourth speed.

  In the invention according to claim 3 of the present invention configured as described above, the number of teeth of the second high-speed step gear is set to be smaller than the number of teeth of the high-speed step gear, so that the idle shaft can be made faster than the speed reducer input shaft. Can be rotated.

  Furthermore, in the invention according to claim 4 of the present invention, the idler shaft is provided with the brake.

  In the invention according to claim 4 of the present invention configured as described above, a space can be used more efficiently by providing the brake on the idle shaft, and in particular, the brake on the idle shaft that rotates at a higher speed than the speed reducer input shaft. The size of the brake can be reduced.

  In the invention according to claim 5 of the present invention, the idler shaft is provided with the rotating disk.

  In the invention according to claim 5 of the present invention configured as described above, a space can be used more efficiently by providing a rotating disk on the idle shaft, and in particular, an idle shaft that rotates at a higher speed than the speed reducer input shaft. By providing the rotating disk, it is possible to reduce the weight of the rotating disk.

  Furthermore, in the invention according to claim 6 of the present invention, the speed detector is provided on the idle shaft.

  In the invention according to claim 6 configured as described above, the space can be used more efficiently by providing the idle shaft with the speed detector.

  According to the present invention, the center of the speed reducer output shaft is disposed as an extension of the center of the speed reducer input shaft, and the speed reducer input shaft, the speed reducer intermediate shaft, and the idle shaft are arranged on the same plane along the vertical direction. As a result, the width of the drive device can be reduced to save the installation area, and thus the length of the machine room in which the drive device is installed can be shortened.

  Moreover, by arranging the reducer input shaft, the reducer intermediate shaft and the idler shaft on the same plane along the horizontal direction, the height dimension of the drive device can be reduced and the installation area can be saved. Therefore, the height dimension of the machine room in which this drive device is installed can be shortened.

  Furthermore, by providing a brake and a rotating disk on the idler shaft that rotates at a higher speed than the speed reducer input shaft, the brake can be made smaller and the rotating disk can be made lighter. The cost required can be reduced.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a passenger conveyor drive device according to the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view of a principal part showing a first embodiment of a passenger conveyor drive device of the present invention, FIG. 2 is a schematic side view of a passenger conveyor on which the drive device of the present invention is installed, and FIG. FIG. 4 is a side view of the driving device viewed from A in FIG. 1, and FIG. 5 is a side view of the driving device viewed from B in FIG.

  A passenger conveyor, for example, an escalator 1, to which the present invention is applied, includes a plurality of treads 2, a tread chain 3 that connects these treads 2 in an endless manner, a main sprocket 4 that rotates the treadle chain 3 and a sub sprocket 4 A sprocket 5, a driving device 6 that drives the main sprocket 4, a main frame 7 that houses them and is installed across the upper and lower floors, and a balustrade 8 that is erected along both sides of the movement direction of the main frame 7 And a handrail 9 that is guided by the periphery of the balustrade 8 and that is rotated by the power of the driving device 6.

  The step board 2 circulates between the upper and lower landing floors 10A and 10B provided on the main frame 7 so as to be flush with the floors of the upper and lower floors, and is stepped in the inclined section of the main frame 7. It is something that moves.

  The main sprocket 4 is provided in a pair of right and left on a drive shaft 11 that is pivotally supported by the main frame 7. The drive shaft 11 has a drive sprocket 12 that obtains power from the drive device 6, and power from the drive device 6. And a handrail driving sprocket 13 for transmitting the above to the moving handrail 9.

  The drive device 6 includes a drive motor 16, an output sprocket 14 that outputs power to the drive sprocket 12, a speed reducer 17 that reduces the rotational speed of the drive motor 16 and transmits it to the output sprocket 14, and the rotation of the drive motor 16. And a speed disk 20 for detecting the speed of the escalator 1. A power chain 15 is provided between the output sprocket 14 and the drive sprocket 12. Is used to transmit power.

  The drive device 6 of the first embodiment is provided in the drive motor 16 and rotates at a first speed, and the speed reducer input shaft 23 to which the high-speed step gear 23B is attached and the speed is lower than the first speed. A reduction gear intermediate shaft 22 to which a high-speed large gear 22A and a low-speed small gear 22B that rotate at the second speed and mesh with the high-speed small gear 23B are attached, and a third speed that is lower than the second speed. A speed reducer output shaft 21 that rotates and meshes with a low speed step small gear 22B and an output sprocket 14 are attached, the center of which is an extension of the center of the speed reducer input shaft 23, and a high speed step size. An idler shaft 24 that rotates via a second high-speed step gear 24B that meshes with the gear 22A is provided, and the reducer input shaft 23, the reducer intermediate shaft 22, and the idler shaft 24 are arranged on the same plane along the vertical direction. To have.

  The reduction gear output shaft 21 is supported by a bearing 26A incorporated in the side surface of the reduction gear box 25 and a bearing 26B incorporated in the rib in the reduction gear box 25, and the reduction gear intermediate shaft 22 is provided on the side surface of the reduction gear box 25. The idle shaft 24 is supported by the incorporated bearings 27A and 27B, and is fixed to the bearings 28A and 28B attached to the side surface of the reduction gear box 25. The drive motor 16 is fixed to the side surface of the speed reducer box 25.

  Further, the number of teeth Z2 of the second high-speed step gear is set to be smaller than the number of teeth Z1 of the high-speed step gear, and the idle shaft 24 is set to be higher than the first speed that is the shaft speed of the speed reducer input shaft 23. The idler shaft 24 that rotates at a high speed and that rotates at a high speed is provided with the brake 18, the rotary disk 19, and the speed detector 20 described above.

  Furthermore, since the side surface of the rotating disk 19 on the side opposite to the speed reducer 17 is arranged closer to the speed reducer 17 side than the side surface of the output sprocket 14 on the speed reducer 17 side, the radius of the rotating disk 19 and the output sprocket 14 are set. Is equal to or greater than the distance between the center of the speed reducer output shaft 21 and the center of the idle shaft 24, and the diameter of the rotary disk 19 can be increased.

  In the first embodiment, the center of the speed reducer output shaft 23 is disposed as an extension of the center of the speed reducer input shaft 21, and the speed reducer input shaft 23, the speed reducer intermediate shaft 22 and the idle shaft 24 are vertically aligned. Since they are arranged on the same plane along the direction, the approximate width dimension LM of the drive device 6 is the sum of the diameter of the low speed large gear 21A and the thickness of the speed reducer box 25, and the drive device 6 width dimension LM can be reduced. it can.

  Further, since the braking force required for the brake 18 has a characteristic of decreasing in proportion to the rotational speed of the shaft to which the brake 18 is mounted, for example, when the relationship of Z1 = Z2 is set, that is, a reduction gear input When the braking force required to brake the escalator 1 is set to T when the shaft speed of the shaft 23 and the shaft speed of the idle shaft 24 are set to be the same, when the relationship of Z1> Z2 in the present embodiment is set, The braking force required when braking the escalator 1 is Z2 / Z1 × T <T, and the braking force can be made smaller than the braking force required when Z1 = Z2.

Further, in order to secure the moment of inertia for safely braking the escalator 1 in the rotating disk 19, when the outer diameter of the rotating disk 19 is the same, the weight of the rotating disk 19 is the square of the rotational speed of the mounting shaft. For example, when the weight necessary for safely braking the escalator 1 is set to W when the relationship of Z1 = Z2 is set, the relationship of Z1> Z2 in the present embodiment is set. When set to, the weight required to brake the escalator 1 safely is (Z2 / Z1) ² × W <W, and the rotating disk 19 should be lighter than the weight required when Z1 = Z2. Can do.

  According to the first embodiment, the center of the speed reducer output shaft 21 is disposed as an extension of the center of the speed reducer input shaft 23, and the speed reducer input shaft 23, the speed reducer intermediate shaft 22 and the idle shaft 24 are arranged in the vertical direction. , The width dimension of the drive device 6 can be reduced and the installation area can be reduced. Therefore, the length dimension LU of the machine room in which the drive device 6 is installed is reduced. Can be shortened.

  Further, by providing the idler shaft 24 that rotates at a higher speed than the speed reducer input shaft 23 with the brake 18 and the rotary disk 19, the brake 18 can be made smaller and the rotary disk 19 can be made lighter. Further, the cost required for the brake 18 and the rotating disk 19 can be reduced.

  FIG. 6 is a cross-sectional view of an essential part showing a second embodiment of the passenger conveyor drive device of the present invention. 6 that are the same as those shown in FIGS. 1 to 5 described above are denoted by the same reference numerals.

  The drive device 6 according to the second embodiment shown in FIG. 6 displaces the drive device 6 according to the first embodiment described above by 90 °, and moves the speed reducer input shaft 23, the speed reducer intermediate shaft 22 and the idle shaft 24 in the horizontal direction. Along the same plane.

  According to the second embodiment, when the machine room depth dimension D is limited due to the installation space of the escalator 1, the long side LH of the drive device 6 is horizontally arranged on the machine room bottom side. Thus, the height direction becomes the short side, that is, the width dimension LM described above, whereby the machine room depth dimension D can be greatly shortened, and the escalator 1 is installed even when the machine room depth direction is limited. It becomes possible.

It is principal part sectional drawing which shows 1st Embodiment of the drive device of the passenger conveyor of this invention. It is a schematic side view of the passenger conveyor by which the drive device of this invention is installed. It is a top view which shows the vicinity of the output sprocket with which a drive device is equipped. It is the side view which looked at the drive device from A of FIG. It is the side view which looked at the drive device from B of FIG. It is principal part sectional drawing which shows 2nd Embodiment of the drive device of the passenger conveyor of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Escalator 6 Drive apparatus 14 Output sprocket 16 Drive motor 17 Reducer 18 Brake 19 Rotating disk 20 Speed detector 21 Reducer output shaft 21A Low speed large gear 22 Reducer intermediate shaft 22A High speed large gear 22B Low speed small gear 23 Deceleration Machine input shaft 23B high-speed gear wheel 24 idle shaft 24B second high-speed gear wheel 25 reducer box

Claims (6)

A drive motor that drives the footboard and the moving handrail via the output sprocket, a speed reducer that is provided between the output sprocket and the drive motor, and that reduces the rotational speed of the drive motor via a plurality of gear trains; In a passenger conveyor drive device comprising a brake that brakes the rotation of the speed reducer, a rotating disk that applies a moment of inertia to the speed reducer, and a speed detector that is provided in the speed reducer and detects the rotational speed,
A reduction gear input shaft that is provided in the drive motor and rotates at a first speed and to which a high-speed step gear is attached, and rotates at a second speed that is lower than the first speed, and the high-speed step gear A reduction gear intermediate shaft to which a meshing high-speed large gear and a low-speed small gear are mounted, a low-speed large gear that rotates at a third speed that is lower than the second speed, and meshes with the low-speed small gear; The output sprocket is mounted, and the idler shaft that rotates via the speed reducer output shaft, the center of which is located at the extension of the center of the speed reducer input shaft, and the second high speed small gear that meshes with the high speed large gear. And the speed reducer input shaft, the speed reducer intermediate shaft and the idle shaft are arranged on the same plane along the vertical direction. A drive motor that drives the footboard and the moving handrail via the output sprocket, a speed reducer that is provided between the output sprocket and the drive motor, and that reduces the rotational speed of the drive motor via a plurality of gear trains; In a passenger conveyor drive device comprising a brake that brakes the rotation of the speed reducer, a rotating disk that applies a moment of inertia to the speed reducer, and a speed detector that is provided in the speed reducer and detects the rotational speed,
A reduction gear input shaft that is provided in the drive motor and rotates at a first speed and to which a high-speed step gear is attached, and rotates at a second speed that is lower than the first speed, and the high-speed step gear A reduction gear intermediate shaft to which a meshing high-speed large gear and a low-speed small gear are mounted, a low-speed large gear that rotates at a third speed that is lower than the second speed, and meshes with the low-speed small gear; The output sprocket is mounted, and the idler shaft that rotates via the speed reducer output shaft, the center of which is located at the extension of the center of the speed reducer input shaft, and the second high speed small gear that meshes with the high speed large gear. And the speed reducer input shaft, the speed reducer intermediate shaft and the idle shaft are arranged in the same plane along the horizontal direction.   The number of teeth of the second high speed step gear is set smaller than the number of teeth of the high speed step gear, and the idle shaft is rotated at a fourth speed that is higher than the first speed. Item 3. A passenger conveyor drive device according to item 1 or 2.   3. The passenger conveyor drive device according to claim 1, wherein the brake is provided on the idle shaft.   3. The passenger conveyor drive device according to claim 1, wherein the rotating disk is provided on the idle shaft. 3. The passenger conveyor drive device according to claim 1, wherein the speed detector is provided on the idle shaft.

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