JP4679846B2 - Man conveyor moving handrail drive device - Google Patents

Description

  The present invention relates to a moving handrail drive device for a man conveyor such as an escalator.

  In the conventional handrail driving device for a man conveyor, both the front and back surfaces of the moving handrail are sandwiched between a driving belt and a reaction belt, and a roller that contacts the inner surface of the handrail side of each belt is provided. The moving handrail is driven by the drive belt in a state of being pressed against (see, for example, Patent Document 1).

Japanese Patent No. 3423333

  In the conventional handrail drive device for a man conveyor, a drive belt and a reaction belt are required, and the structure is complicated. Further, since the handrail driving force is applied only to one side of the moving handrail, a large number of rollers are required to obtain a predetermined driving force without increasing the pressing force, and the structure is increased in size.

  The present invention has been made to solve the above-described problems, and its object is to drive a moving handrail of a man conveyor that can be realized with a small and simple structure by applying a driving force to both sides of the moving handrail. A device is provided. It is another object of the present invention to provide a moving handrail driving device for a man conveyor that can extend the life of a moving handrail by applying an effective handrail driving force without applying excessive pressure.

The moving handrail drive device for a man conveyor according to the present invention includes a pair of left and right upper fixed rollers and a pair of left and right lower pressure rollers that sandwich the return path side of the moving handrail from both sides, and a pair of lower pressure rollers at one end. A pivotable lever that supports the pivot pivotally as a fulcrum, and a movable bracket on the other end opposite to the pivot of the lever in the direction of the pair of fixed rollers facing the pair of pressure rollers A pressure spring for pressing, and a handrail driving means for rotating the pair of fixed rollers and the pair of pressure rollers in opposite directions to apply driving force to both surfaces of the moving handrail, Four driven sprockets respectively attached to the rotation shafts of the pair of fixed rollers and the pair of pressure rollers, and one drive chain meshing with the driven sprockets; Provided under the dynamic sprockets, constant drive and dynamic sprocket that is transmitting power to the drive chain, and one movable sprockets provided at the lower portion of the driven sprocket, the drive chain is pressed against a movable sprocket bets on the drive side of the chain And a spring for applying a tension of.

  According to this invention, since the upper fixed roller and the pressure roller that sandwich the return path side of the moving handrail from both sides are driven by the handrail driving means, the handrail driving force is applied via the contact surfaces of all the rollers and the moving handrail. Therefore, compared with driving with a roller or belt that contacts only one side of the moving handrail, the number of locations where the driving force is transmitted to the moving handrail is doubled. Even if halved, the same driving force can be applied to the moving handrail, and it is not necessary to press the moving handrail with excessive pressure, and the life of the moving handrail can be extended.

Embodiment 1 FIG.
FIG. 1 is a side view showing a state in which the moving handrail driving device for a man conveyor according to Embodiment 1 of the present invention is incorporated in an escalator, and FIG. 2 is an enlarged view of the moving handrail driving device for a man conveyor according to Embodiment 1 of the present invention. FIG. 3 is a rear view showing the moving handrail driving device for the man conveyor in the first embodiment of the present invention.
In the figure, reference numeral 1 denotes a truss of a man conveyor that is straddled between beams on the upper and lower floors, and has a balustrade 3 for guiding an endless moving handrail 2 on both sides thereof. A plurality of endless steps (not shown) are arranged in the internal longitudinal direction of the truss 1. An endless step (not shown) of the man conveyor is, for example, an endless wound around a step sprocket (not shown) driven by a drive motor (not shown) housed in the upper machine room of the truss 1. It moves while being locked in a column by a stepped chain (not shown).
The handrail drive device 4 of the present invention is fixed to the truss 1 via an attachment frame 5 and has a structure for applying a driving force to both the front and back surfaces of the moving handrail 2. That is, the handrail driving device 4 includes a pair of left and right upper fixed rollers 6 and a pair of left and right lower pressure rollers 7 that sandwich the return-side moving handrail 2 from both upper and lower surfaces. The pair of lower pressure rollers 7 are rotatably supported on a swingable lever 9 with a pivot 8 provided at an outer end portion as a fulcrum, and an inner side end opposite to the pivot 8 of the lever 9. The part is pressed upward by a pressurizing spring 11 which is a pressurizing means via a movable bracket 10. The pair of lower pressure rollers 7 is pressed in the direction of the pair of upper fixed rollers 6 with the moving handrail 2 sandwiched between them by the pressing force of the pressure spring 11. The lever 9 has a long hole structure on the movable bracket 10 side, and the lever 9 can be rotated upward by a pressure spring 11 with the pivot 8 as a fulcrum. The pair of fixed rollers 6 and the pair of pressure rollers 7 have driven sprockets 12 attached to the respective rotary shaft ends, and are driven simultaneously by a single drive chain 13 that meshes with these driven sprockets 12. This drive chain 13 is driven by the power transmitted to the drive sprocket 14 provided in the lower part. The power of the drive sprocket 14 is transmitted via a drive motor, a handrail drive sprocket, a handrail drive chain (all not shown), and the like. The drive chain 13 is configured such that a constant tension is applied to the drive chain 13 by pressing a movable sprocket 16 rotatably supported on the movable bracket 15 by a spring 17. Although the handrail drive means by the chain transmission mechanism comprising the driven sprocket 12, the drive chain 13, the drive sprocket 14, the movable sprocket 16 and the like is configured, the handrail drive means by the belt transmission mechanism may be used. One end of each of the pressure spring 11 and the spring 17 is fixedly supported by a fixing bracket 18 fixed to the mounting frame 5. In addition, the arrow 30 in a figure shows the moving direction of the moving handrail 2, and the arrow 31 shows the rotation direction of a roller.

  According to the above configuration, since the pair of left and right upper fixed rollers 6 and the pair of left and right lower pressure rollers 7 sandwiching the movable handrail 2 from above and below are driven by the single drive chain 13, all the rollers are driven. And a handrail driving force is applied via a contact surface between the handrail 2 and the movable handrail 2. As a result, the number of locations where the driving force is transmitted to the moving handrail 2 is doubled compared to the case of driving with a roller or belt that contacts only one side of the moving handrail 2, so if the number of rollers to be sandwiched is the same Even if the pressure is halved, the same driving force can be applied to the moving handrail 2, and it is not necessary to press the moving handrail 2 with an excessive pressure, and the life of the moving handrail can be extended.

Embodiment 2. FIG.
FIG. 4 is an enlarged perspective view showing a moving handrail drive device for a man conveyor according to Embodiment 2 of the present invention.
In the moving handrail drive device 4 according to the first embodiment, the driven sprockets 12 are respectively attached to the rotation shaft ends of the pair of upper fixed rollers 6 and the pair of lower pressure rollers 7, and one drive chain is engaged with these driven sprockets 12. 13 and the drive sprocket 14 for driving the drive chain, etc., a handrail driving force is obtained. In the second embodiment, the pair of left and right upper fixed rollers 6 rotate on the fixed frame 19. The pair of left and right lower pressure rollers 7 are supported on the movable frame 20 so as to be freely rotatable. The movable frame 20 is pressed against the upper fixed roller 6 by a pressure spring 11 having one end fixed to a fixed bracket 18 fixed to the mounting frame 5. The upper fixed roller 6 is rotationally driven in the direction of the arrow 31 by the gear mechanism 23 from the output shaft of the speed reducer 22 driven by the motor 21. On the other hand, the lower pressure roller 7 is rotationally driven in synchronization with the upper fixed roller 6 in a reverse direction by a separate driving force transmission mechanism similarly configured. As a result, the moving handrail 2 is driven in the direction of the arrow 30. Arrows 32 in the figure indicate the directions of rotation of the separate motors 21 and are opposite to each other.

  Even in the configuration as described above, as in the first embodiment, the upper fixed roller 6 and the lower pressure roller 7 are applied with handrail driving force at all contact points where they contact the handrail. Compared to driving with a roller or belt that contacts only one side, the number of places where the driving force is transmitted to the moving handrail 2 is doubled. The same driving force can be applied to the moving handrail 2, and it is not necessary to press the moving handrail 2 with an excessive pressure, and the life of the moving handrail can be extended.

It is a side view which shows the state which built the moving handrail drive device of the man conveyor in Embodiment 1 of this invention in the escalator. It is a perspective view which expands and shows the moving handrail drive device of the man conveyor in Embodiment 1 of this invention. It is a rear view which shows the moving handrail drive device of the man conveyor in Embodiment 1 of this invention. It is a perspective view which expands and shows the moving handrail drive device of the man conveyor in Embodiment 2 of this invention.

Explanation of symbols

1 truss,
2 Moving handrail 3 Railing 4 Handrail drive device 5 Mounting frame 6 Upper fixed roller 7 Lower pressure roller 8 Pivot 9 Lever
10 Movable bracket 11 Pressure spring
12 driven sprocket 13 drive chain 14 drive sprocket 15 movable bracket 16 movable sprocket 17 spring 18 fixed bracket 19 fixed frame 20 movable frame 21 motor 22 speed reducer 23 gear mechanism 30 moving direction of moving handrail 31 rotating direction of roller 32 rotating direction of motor

Claims (3)

In a man conveyor with a moving handrail,
A pair of left and right upper fixed rollers and a pair of left and right lower pressure rollers that sandwich the return side of the moving handrail from both sides;
A swingable lever that rotatably supports the pair of lower pressure rollers with a pivot provided at one end as a fulcrum;
A pressure spring provided on the other end opposite to the pivot of the lever via a movable bracket and pressing the pair of pressure rollers toward the pair of fixed rollers facing each other;
Handrail driving means for rotating the pair of fixed rollers and the pair of pressure rollers in synchronization with each other in opposite directions, and applying a driving force to both surfaces of the moving handrail,
The handrail driving means is provided with four driven sprockets respectively attached to the rotation shafts of the pair of fixed rollers and the pair of pressure rollers, one drive chain meshing with the driven sprockets, and a lower portion of the driven sprocket. provided, the drive moving the sprocket that is transmitting power to the drive chain, one and a movable sprocket provided in a lower portion of the driven sprocket, fixed the movable sprocket preparative the pressed drive chain to the drive chain side A moving handrail drive device for a man conveyor characterized by comprising a spring for applying tension.   2. The man conveyor according to claim 1, wherein the handrail driving means is configured to rotate the pair of fixed rollers and the pair of pressure rollers in the reverse direction by a belt transmission mechanism instead of the chain transmission mechanism. Mobile handrail drive device.   3. The moving handrail driving device for a man conveyor according to claim 1, wherein the driving force of the handrail driving means is transmitted from a driving motor for the man conveyor.

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