JP4892598B2 - Passenger conveyor drive - Google Patents

Description

  The present invention relates to a driving device for a passenger conveyor such as an escalator or an electric road, and more particularly to a driving device for a passenger conveyor that wraps a belt between a driving pulley and a driven pulley to transmit a driving force.

  A driving device of a passenger conveyor for driving a plurality of steps connected endlessly and moving between entrances and a moving handrail that moves in synchronization with these steps, driving force from a driving pulley to a driven pulley As a transmission means for transmitting, a belt in which a belt is wound between a driving pulley and a driven pulley is generally used. Conventionally, in order to improve the friction coefficient of the belt, there is one in which a plurality of V belts having a V-shaped cross section are arranged in parallel between a driving pulley and a driven pulley (see, for example, Patent Document 1).

  Moreover, although it is not a driving device for a passenger conveyor, a drive in which a plurality of V-ribbed belts having four or less protrusions in the belt width direction are wound in parallel between a plurality of pulleys having seven or more V grooves in the belt width direction. An apparatus has also been proposed (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2004-137040 (paragraph number 0011, FIG. 1 and FIG. 2) Japanese Utility Model Publication No. 59-136061 (left column of page 1, FIGS. 1 and 8)

  However, the former uses three V belts. However, when three V belts are used, there is a large variation in tension between the belts, and some belts transmit a driving force exceeding the allowable value. There is a problem that the life of the belt is shortened.

  In the latter, a plurality of V-ribbed belts having four or less protrusions in the belt width direction are wound in parallel between a plurality of pulleys having seven or more V grooves in the belt width direction, The specifications are limited. When such a structure is applied to a driving device for a passenger conveyor, there is a problem that it is difficult to satisfy other predetermined elements while ensuring a necessary friction coefficient. That is, in the drive device for the passenger conveyor, the rotating shaft of the driven pulley is provided with a brake, and if the friction coefficient of the belt is not sufficiently secured, the belt slips during braking and the passenger conveyor There is a risk of sudden stop. In order to increase the friction coefficient of the belt with the conventional structure, it is necessary to increase the pulley diameter or the number of belts. However, if the pulley diameter is increased, the cost increases and the apparatus becomes larger and the driving device for the passenger conveyor There was a problem that was not suitable. Further, if the number of belts is increased, for example, 3 belts, as in the case described above, there is a large variation in tension between the belts, and some belts transmit a driving force exceeding an allowable value. There was a problem that the lifetime was shortened.

  The present invention has been made from the above-described prior art, and its purpose is to drive a passenger conveyor that can secure the necessary friction coefficient without increasing the number of belts and increasing the size of the apparatus. Is to provide.

  To achieve the above object, the present invention provides an electric motor, a driving pulley driven by the electric motor, a flywheel provided coaxially with the driving pulley, a brake, and a rotating shaft to which the brake is attached. A driving pulley for a passenger conveyor that includes a driven pulley coupled to the belt, and a belt wound between the driving pulley and the driven pulley, wherein the belt transmits the driving force to the passenger conveyor. And a total of 12 or more and 18 or less V-ribbed belts, and the frictional force of the V-ribbed belt is larger than the braking force.

  In the present invention configured as described above, the belt wound between the drive pulley and the driven pulley is a V-ribbed belt having 12 to 18 protrusions in the belt width direction, thereby increasing the number of belts, In addition, it is possible to secure a coefficient of friction required as a driving device for a passenger conveyor without increasing the size of the device, and to make the friction force of the V-ribbed belt larger than the braking force.

  Further, the present invention is characterized in that two V-ribbed belts are arranged in parallel in the belt width direction.

  In the present invention configured as described above, by providing two V-ribbed belts in parallel, even if an abnormality occurs in one belt while minimizing an increase in the number of belts, the other one is urgent. Can respond.

  According to the present invention, by setting the number of belts to two or less, variations in tension generated between the belts can be suppressed, thereby extending the life of the belt. In addition, since a high friction coefficient can be obtained in a space-saving manner, it is possible to prevent an increase in size and cost of the apparatus. Furthermore, the friction coefficient required as a driving device for the passenger conveyor can be ensured, and the belt can be prevented from slipping during braking, thereby achieving a smooth stop during braking and consequently the passenger conveyor. Safety can also be improved.

It is a front view which shows the Example of the drive apparatus of the passenger conveyor which concerns on this invention. It is principal part sectional drawing in alignment with the AA of FIG. It is a schematic block diagram of the escalator to which the drive device of this invention is applied. It is a side view of the drive device of a present Example.

  Embodiments of a passenger conveyor drive device according to the present invention will be described below with reference to the drawings.

  As shown in FIG. 3, the passenger conveyor, for example, the escalator 1 is installed across the upper and lower floors, and is composed of an upper horizontal frame 2A, an intermediate inclined frame 2B, and a lower horizontal frame 2C. A drive sprocket 3 pivotally supported in the frame 2A, a driven sprocket 4 pivotally supported in the lower horizontal frame 2C, and a step chain 5 wound endlessly across the drive sprocket 3 and the driven sprocket 4 And a plurality of steps 6 having a step plate connected to the step chain 5 and always held horizontally on the outward path side, and a balustrade panel erected along positions corresponding to both sides in the width direction of the step 6 in the frame 2 7, a moving handrail 8 that moves while being guided by the periphery of the balustrade panel 7, and a driving device 9 that includes a drive unit for the step chain 5 and the moving handrail 8.

  The drive device 9 transmits power to the drive mechanism of the step chain 5 and the moving handrail 8 via the power transmission chain 10. As shown in FIGS. 1 and 4, the drive device 9 includes an electric motor 11, a gear machine 12 that serves as a driving force transmission path, and a brake machine 14 that is attached to the input shaft 13 of the gear machine 12 and applies a braking force. The driving force of the electric motor 11 is transmitted to the input shaft 13 of the gear machine 12 via the belt 17 wound between the driving pulley 15 of the electric motor 11 and the driven pulley 16 of the gear machine 12. Then, it is transmitted to the drive sprocket 3 through the power transmission chain 10 wound around the pulley 19 fixed to the output shaft 18 of the gear machine 12. A flywheel 21 is fixed to the drive shaft 20 of the electric motor 11. Further, an auto tensioner 22 that makes the tension of the belt 17 constant is provided on at least one side of the belt 17.

  As shown in FIGS. 1 and 2, the belt 17 includes two V-ribbed belts 17a and 17b, and each of the V-ribbed belts 17a and 17b has six protrusions in the belt width direction. Yes. Further, as shown in FIG. 2, the drive pulley 15 and the driven pulley 16 around which the V-ribbed belts 17a and 17b are wound are formed with grooves corresponding to the protrusions of the V-ribbed belts 17a and 17b (the driven pulley). Although the groove 16 is not shown, the groove is formed in the same manner as the drive pulley 15).

  In the present embodiment, the belt 17 wound between the drive pulley 15 and the driven pulley 16 is formed into V-ribbed belts 17a and 17b having a total of 12 protrusions in the belt width direction, so that a V-ribbed belt is obtained. The frictional force of 17a and 17b can be made larger than the braking force. Thus, when the brake 14 is operated, the inertia force of the flywheel 21 can be transmitted to the driven side without slipping the V-ribbed belts 17a and 17b, so that the passenger conveyor can be gently stopped.

  According to the present embodiment, by setting the number of the V-ribbed belts 17a and 17b to two, variations in tension generated between the belts can be suppressed, and thereby the life of the belt can be extended. Further, since the V-ribbed belts 17a and 17b can obtain a high friction coefficient in a space-saving manner, it is possible to prevent an increase in the size and cost of the apparatus. Furthermore, the friction coefficient required as a driving device for the passenger conveyor can be secured, and slippage can be prevented from occurring in the V-ribbed belts 17a and 17b during braking, thereby realizing a smooth stop during braking. As a result, the safety of the passenger conveyor can be improved. Furthermore, by setting the number of the V-ribbed belts 17a and 17b to two, even if an abnormality occurs in one belt while minimizing an increase in the number of belts, an emergency response can be made with the other one. it can. Further, since the tension of the V-ribbed belt belts 17a and 17b can be kept constant by providing the auto tensioner 22, the belt tension adjustment interval can be further increased.

  In this embodiment, as shown in FIGS. 1 and 2, the belt 17 is two V-ribbed belts 17a and 17b each having six protrusions in the belt width direction. Not limited to this, the number of belts can be set to one, or the protrusions of the V-ribbed belt can be arbitrarily set within a range of 12 to 18 in total. The reason why the number of protrusions is set to 12 or more is that it is necessary to obtain a predetermined coefficient of friction as a driving device for a passenger conveyor, and the number of protrusions is set to 18 or less. In view of the above, it is because the size is increased. In addition, since the number of protrusions should be 12 to 18 in total, in the case of one belt, it is only necessary to provide 12 to 18 protrusions in one belt. In the case of the belt, the total of the two belts may be 12 to 18 protrusions. Furthermore, although the escalator was mentioned as an example as a passenger conveyor in the present Example, it cannot be overemphasized that it can apply to the drive device of an electric road.

DESCRIPTION OF SYMBOLS 1 Escalator 2 Frame 2A Upper horizontal frame 2B Middle inclined frame 2C Lower horizontal frame 3 Drive sprocket 4 Driven sprocket 5 Step chain 6 Step 7 Railing panel 8 Moving handrail 9 Drive device 10 Power transmission chain 11 Electric motor 12 Gear machine 13 Input shaft 14 Brake 15 Drive pulley 16 Driven pulley 17 Belt 17a V-ribbed belt 17b V-ribbed belt 18 Output shaft 19 Pulley 20 Drive shaft 21 Flywheel 22 Auto tensioner

Claims (2)

  An electric motor, a drive pulley driven by the electric motor, a flywheel provided coaxially with the drive pulley, a brake, a driven pulley connected to a rotating shaft to which the brake is attached, and the drive pulley; A passenger conveyor driving device that transmits a driving force to a passenger conveyor, wherein the belt has a total of 12 to 18 protrusions in the belt width direction. A driving device for a passenger conveyor, comprising: one or two V-ribbed belts having a frictional force greater than a braking force.   2. The passenger conveyor drive device according to claim 1, wherein two V-ribbed belts are arranged side by side in the belt width direction.

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