JPS6141739Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a moving handrail driving device for a passenger conveyor, and more particularly to a moving handrail driving device suitable for a large passenger conveyor where the moving handrail running resistance is large.

1 and 2 show a conventional moving handrail drive mechanism for a passenger conveyor. The sprocket 2 of the output shaft of the drive machine 1 and the drive sprocket 4 of the main drive shaft 3 that drives the steps are connected by a drive chain 5, and the sprocket 6 integrated with the main drive shaft 3 and the moving handrail drive sprocket 7 are connected. Connect with chain 8 to transmit driving force to the moving handrail drive device. In FIG. 1, a moving handrail drive pulley 9 is located at the balustrade terminal and drives a moving handrail 10. In Fig. 2, the driving force is transmitted from a sprocket 11 which is coaxial with and integrated with the moving handrail drive sprocket 7 to a moving handrail driving roller 13 via a chain 12, and the moving handrail 10 is sandwiched between the upper and lower rollers to generate friction. Drive.
The main drive shaft 3 is fixed to the frame of the passenger conveyor, and the step chain sprocket 14 is integrated with the main drive shaft, and the step chain sprocket 16 of the driven shaft 15 in the lower machine room is connected to the main drive shaft 3. 1
7 is applied, and the driven shaft 15 is rotating via the step chain 17. However, the position of the driven shaft 15 changes depending on the length of the step chain 17, and in order to apply a constant tension force to the step chain and adjust the extension of the step chain, the driven shaft 15 is tensioned by a spring 18. The position changes even during use. As described above, it is difficult to transmit power from the moving driven shaft to other parts, so it is common for the moving handrail drive device to apply driving power only from the main drive shaft 3. On the other hand, in recent years, many passenger conveyors have large lifting heights and strokes, and the size is gradually increasing, and as the moving rails have become longer, the running resistance of the moving rails has also increased. For this reason,
The driving force of the moving handrail must also be increased, but there is a limit to the driving force of one set of drive devices, which has been an obstacle to increasing the size of the passenger conveyor.

The object of the present invention is to provide a structure that increases the driving force of the moving rail of a large passenger conveyor.

In order to achieve the above object, the present invention provides an intermediate shaft at a fixed position passing through the center of the driven shaft and substantially orthogonal to the tension direction of the driven shaft, and transmits the power of the driven shaft to this intermediate shaft via a chain. At the same time, a driven side moving handrail drive device was provided which operated using the rotation of this intermediate shaft as power.

Examples of the present invention are shown below in Figures 3, 4, and 5.
This will be explained using figures. In both FIGS. 3 and 4, a moving handrail drive device similar to the conventional one is provided on the main drive shaft 3 side. In the conventional system, the moving handrail 10 receives direct driving force near the main drive shaft 3, but the area near the driven shaft 15 is separated from the drive device 1, and the bending resistance of the moving handrail 10 and the moving handrail guide (Fig. (not shown) and the frictional resistance of the moving handrail 10 cancel each other out with the moving handrail driving force, so that sufficient driving force is not transmitted. Therefore, in the present invention, a moving handrail drive sprocket 19 is also attached to the moving driven shaft 15.
This was connected to the moving handrail drive device on the driven shaft side by a chain, so that the moving handrail was driven at two locations. That is, as mentioned earlier,
Since the driven shaft 15 is pulled laterally by the spring 18, if the sprocket 19 and the moving handrail drive device are directly connected with a chain, the tension of the spring 18 will change depending on the driving tension, and the tension of the step chain 17 will change. Appropriate tension cannot be obtained. In addition, the length of the moving handrail drive chain is affected because the driven shaft 15 moves as the step chain gradually extends. Therefore, in the present invention, an intermediate shaft is provided at a fixed position (directly below in this figure) in a direction perpendicular to the direction in which the driven shaft moves from the center of the driven shaft 15, and the sprocket 20 provided on this intermediate shaft and the driven shaft 15 sprockets 19 were connected with chain 21. In this way, even if the driven shaft 15 moves a little, the length between the centers of the sprockets 19 and 20 will hardly change, so the length of the chain 21 will not be affected. Further, since the attractive force of the chain 21 is applied in the vertical direction of the driven shaft 15, the driven shaft 15 does not receive any force to move laterally, and the tension of the step chain 17 does not change. In Fig. 3, a sprocket (not shown) integrated with the sprocket 20 and a sprocket 24 of the moving handrail drive pulley are connected by a chain 23, and the moving handrail is driven by the drive pulley 27 of the balustrade terminal. . In FIGS. 4 and 5, the coaxial sprockets 20, 22 and chains 21, 23 have the same structure as in FIG. I am attached to it. Then, move the sprocket 25 and move the handrail drive roller 28 and chain 26.
As with the main drive shaft side, the movable handrail is clamped and driven by the drive roller 28.

According to the present invention, without damaging the function of the driven shaft,
In addition, since the driven shaft can be used to drive the moving handrail without transmitting the influence from the driven shaft to others, the driving force of the moving handrail can be increased in conjunction with the main drive shaft driving the moving handrail. This has the effect of providing sufficient driving force even for high-lift, long-travel moving handrails.

[Brief explanation of the drawing]

Figure 1 is a diagram of the moving handrail drive mechanism of a conventional panel-type balustrade passenger conveyor, Figure 2 is a diagram of the moving handrail drive mechanism of a conventional transparent type balustrade, and Figure 3 is a diagram of the moving handrail drive mechanism of the panel-type balustrade of the present invention. Fig. 4 is a diagram of the handrail drive mechanism of the present invention, and Fig. 5 is a diagram of the moving handrail drive mechanism of the transparent balustrade of the present invention.
The figure is a front view of the driven shaft portion of FIG. 4. 15... Driven shaft, 16... Step chain sprocket, 19, 20... Moving handrail drive sprocket, 21... Moving handrail drive chain, 22... Moving handrail driving sprocket, 23... Moving handrail drive Chain, 24, 25...Moving handrail drive sprocket, 26...Moving handrail drive chain.

Claims (1)

[Scope of utility model registration request] A main drive shaft driven by a drive mechanism, a driven shaft that receives power from the main drive shaft via a chain, and a tensioning device that supports this driven shaft so that it can be displaced in the tension direction of the chain; In a passenger conveyor equipped with a moving handrail drive device that drives a moving handrail using the main drive shaft as power, an intermediate shaft is provided at a fixed position passing through the center of the driven shaft and substantially perpendicular to the tension direction of the driven shaft. A moving handrail for a passenger conveyor, characterized in that a driven side moving handrail drive device is provided which transmits the power of the driven shaft to the intermediate shaft via a chain and operates using the rotation of the intermediate shaft as power. Drive device.