JPS6313910B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a handrail drive device for a passenger conveyor such as an escalator or an electric road, and more particularly to a handrail drive device with improved drive and support for driven rollers. .

[Conventional technology]

Currently, passenger conveyors such as escalators generally move handrails at the same speed as the steps in order to transport passengers safely. The drive device for this moving handrail is normally installed within the main body frame 1 of the escalator, as shown in FIG.
A driving roller group 2 and a driven roller group 3 are provided, and the driving roller group 2 is driven by a driving chain 4, and the driven roller group 3 is pressed against the driving roller group 2 by a spring 5, so as to pinch the movable handrail 6. It is configured.

[Problem that the invention seeks to solve]

However, in this configuration, the driven roller group 3 always pushes the moving handrail 6 with a constant pressing force, so the same place on the moving handrail 6 continues to be pressed while the escalator is stopped, and as a result, impressions are created on the handrail and the handrail is moved. This has the disadvantage that it adversely affects the handrail 6 and at the same time reduces the design effect. These defects occur each time the escalator stops, and the impressions increase with each different stop position. Furthermore, as the floor height of the escalator increases, the running resistance of the moving handrail 6 increases, and in order to reliably move the moving handrail 6, the force of the spring 5 of the driven roller group 3 is increased to increase the pressing force. However, as the pressing force increases, the above-mentioned drawbacks become more and more noticeable.

The present invention has been made in view of the above points, and an object of the present invention is to provide a highly reliable handrail drive device that does not cause impressions on a moving handrail.

[Means for solving problems]

The present invention also provides a method in which the driven roller is fixed to the main body frame side of the passenger conveyor, the driving roller is placed on a moving handrail facing the driven roller, and the driving roller is movable in the direction of gravity action. The above object is achieved by providing a guide pin and a guide between the roller and the driven roller so that the driving roller can move only in one direction, and by providing a rolling guide near the guide pin.

〔Example〕

An embodiment of the present invention will be described below regarding an escalator handrail drive device shown in FIGS. 2 to 4. The arrangement of the main frame of the escalator, moving steps, handrails, and roller groups is basically the same as that shown in FIG. 1. The plurality of driven rollers 7 are rotatably supported by a support frame 8, and the support frame 8 is fixed to the main frame (FIG. 1) side of the escalator. On the other hand, the plurality of driving rollers 9 facing the driven roller 7 have their surfaces covered with an elastic body, and are rotatably supported on a base 10 by pins 11. Each drive roller 9 is provided with a sprocket 12 concentrically. In addition to this, base 10 also has sprockets 14 and 15.
are rotatably supported, and each of the drive rollers 9 is attached to each of these sprockets 12, 14, 15.
A driven chain 13 that constitutes a driving condition for transmitting power to is wound around. And sprocket 1
5 is formed into two strips, and another drive chain 16 constituting a drive strip is wound around one side of the two strips to transmit power from the escalator's drive gear (not shown). Further, the tension direction of the drive chain 16 is such that the base 10 is pulled down in one direction where gravity acts. Furthermore, the base 10 is moved in the direction of gravity with respect to the support frame 8, that is,
The base 10 and each drive roller 9 are configured to be movable in only one direction that can be moved by their own weight. The specific structure is as follows: First, the movable direction of the base 10 is attached to the support frame 8, for example, the opposing drive roller 9
A guide pin 17 is provided along a straight line connecting the center of rotation of the driven roller 7 and the center of rotation of the driven roller 7, and this guide pin 17 is extended to the base 10 side. Two guide pieces 18 are provided on the base 10 side at positions along the movable direction, and the guide pin 17 is fitted into a hole 19 of the guide piece 18 and slid thereon. Further, on both sides of the guide pin 17 of the support frame 8, rolling guides 20 each having a rolling roller at the tip are protruded and abutted on the base 10, and roll only in the movable direction of the base 10, so that the base 10 I try to guide the movement of the person. A handrail drive device is constructed by sandwiching the moving handrail 21 between the drive roller 9 and the driven roller 7 arranged in this manner.

To explain the operation of the drive device configured as above, first, the power from the escalator drive gear is transmitted through the drive chain 16 to the sprocket 15.
The driven chain 13, which is wound around the sprocket 15, rotates the drive roller 9 integrated with the sprocket 12, thereby driving the movable handrail 21 in contact with the drive roller 9. In addition, the movable handrail 2 that is in contact with
1 requires a frictional force between it and the drive roller 9, and this frictional force can be obtained as follows. That is, the base 1 on which the drive roller 9 is supported
0 is configured to be movable in the direction of gravity with respect to the support frame 8. Therefore, the tension acting on the drive chain 16 directly pushes down the drive roller 9 in the direction of gravitational force via the base 10, and in addition, the drive roller 9 pushes down on the sprocket 1.
The weight of each component mounted on the base 10, such as 2, acts as a force pushing down the driving roller 9, and presses the moving handrail 21 onto the driven roller 7, thereby obtaining a frictional force.

Further, when the escalator is stopped, no driving force is applied and no tension is applied to the drive chain 16. Therefore, the force that presses the moving handrail 21 is only the weight of each component mounted on the base 10.

As described above, according to this embodiment, the pressing force of the drive roller 9 when the escalator is in operation and when it is stopped is changed by using changes in the tension of the drive chain 16. Compared to the case where the handrail 21 is pressed with the same force as during operation, impressions on the handrail 21 are no longer generated.

Note that when the running resistance of the moving handrail 21 increases due to an increase in the floor height of the escalator or the transportation of heavy objects, the tension of the driven chain 13 increases to increase the transmitted torque. This increase in tension is also transmitted to the drive chain 16 via the sprocket 15, increasing the tension in the drive chain 16. As a result, a portion of the increased tension of the drive chain 16 acts to pull the base 10 in the movable direction of the guide pin 17, which causes the drive roller 9
This becomes a force that presses the moving handrail 21 onto the moving handrail 21. Therefore, the pressing force of the drive roller 9 against the moving handrail 21 is automatically adjusted in accordance with the change in running resistance of the moving handrail.

In addition, in this embodiment, a guide pin 17 and a rolling guide 20 are arranged side by side as a moving mechanism for guiding the movement of the base 10 in the direction of gravity action.
This is because it is necessary to evenly sandwich the moving handrail 21 between a plurality of driving rollers 9 and driven rollers 7, and when a high level of dimensional accuracy is required between both rollers, one guide pin 17 can be used to hold the base 10. Since parallel movement can be guided, the accuracy can be easily increased. Since the rolling guides 20 are provided on both sides of the guide pin 17, they function to suppress the base 10 from rotating around the guide pin 17 due to the drive reaction force received by the drive roller 9, and at the same time prevent the base 10 from rotating around the guide pin 17. Smooth functions to guide parallel movement. In addition, since there is only one guide pin 17, adjustment of the sliding direction is extremely easy compared to the case where multiple guide pins are provided, and therefore the parallel movement is also smooth, and as a result, manufacturing and structure are simplified. can provide a highly reliable movement mechanism.

Although the above embodiment has been described with respect to a handrail drive device for an escalator, it is of course applicable to a handrail drive device for an electric road.

〔Effect of the invention〕

As explained above, according to the present invention, the driving roller is movably supported by a single guide pin and a rolling guide, and the pressing force of the roller against the moving handrail is automatically changed between when the moving handrail is in operation and when it is stopped. With this structure, the pressing force when stopped is reduced, so that impressions by the rollers are not formed on the moving handrail when stopped, and a reliable handrail drive device for a passenger conveyor can be provided.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the area around the conventional handrail drive device, FIG. 2 is a side view showing the area around the handrail drive device according to the present invention, FIG. 3 is a sectional view of FIG. FIG. 7...Followed roller, 9...Drive roller, 13...
...Driven chain, 16... Drive chain, 17...
...Guide pin, 20...Rolling guide, 21...Movable handrail.

Claims (1)

[Scope of Claims] 1. A moving step movably mounted on a main body frame, a moving handrail disposed on the main body frame along substantially the entire length of this moving step, and a part of this moving handrail that can be moved. A driven roller that is dynamically supported and fixed to the main body frame side, a driving roller placed on the moving handrail facing the driven roller, and driving conditions for driving this driving roller at a speed synchronized with the moving step. In the handrail drive device configured to be able to move the driving roller in a straight line connecting the rotation centers of the driving roller and the driven roller, the linear direction and the driving roller are disposed on either the driving roller side or the driven roller side. One matching guide pin is provided, and a guide is provided on the other side for slidingly guiding the guide pin in the linear direction, and a guide is provided on either one of the driving roller side and the driven roller side to abut the other side. 1. A handrail drive device for a passenger conveyor, characterized in that a rolling guide is provided that rolls on the moving handrail, and the tension of the driving condition is applied in a direction in which the drive roller presses the moving handrail. 2. The handrail drive device for a passenger conveyor according to claim 1, wherein the rolling guide is located on both sides of the guide pin.