JPS6013956B2 - Moving handrail drive device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to escalators and the like, and particularly to a driving device for a moving handrail.

If the handrail of a passenger conveyor such as an escalator has many bends on its running path, the internal resistance increases with the bends, increasing the overall running resistance and requiring a large driving force.

For this reason, when the friction coefficient of the drive section decreases, a problem arises in that only the drive section idles and the handrail does not move.
A conventional moving handrail drive device will be explained using an escalator with reference to FIG.

In the figure, a drive machine 2 is built in a truss frame 1 of the escalator, and this power is transmitted to a step sprocket 4 via a drive chain 3, and a moving handrail sprocket 5 is integrated with the step sprocket 4. According to
The moving handrail chain 6 is driven to rotate the drive wheel 7. On the other hand, the handrail 8 is wound around the outer periphery of the drive wheel 7 and driven by friction, but in order to increase the winding angle and increase the driving force, it is reversely bent by a group of guide rollers 9 and the rollers in the reversing section 10 It is running in a swamp on the upper or deck 11 guide. When the moving handrail 8 is bent forward or backward by the reversing unit 10, the drive wheel 7, the guide roller 9, or even a tension device (not shown) for applying tension to the moving handrail 8, the bending Since the internal resistance increases, a large driving force is required.

Particularly in the cold winter, the moving handrail 8 hardens and the internal resistance due to bending increases.As a result, if the friction coefficient of the surface of the drive wheel 7 decreases, only the drive wheel 7 will idle and the moving handrail 8 will There was a problem that the train would not run properly, which could even result in personal injury to the passengers. Furthermore, it has been pointed out that the fact that the movable handrail 8 has many bends means that the movable handrail 8 itself must be made longer to accommodate the bends, leading to higher production costs. As an attempt to solve these problems, it has been proposed to press the front and back sides of the moving handrail 8 and drive the moving handrail 8 in a substantially straight line, as shown in FIG.

To explain its structure with reference to FIG. 2, the transmission of the power of the drive machine 2 to the moving handrail chain 6' is the same as the conventional one, but the drive device 12 that drives the front and back of the moving handrail 8 by applying pressure is different. ing. That is, the drive device 12 has a drive sprocket 13 that rotates under the power of the first moving handrail chain 6', and the rotational force of this drive sprocket 13 is transmitted to the second handrail chain 6'.
A moving handrail chain 14 rotates a drive roller 15 that is integrally mounted on a sprocket. On the other hand, on the opposite side of the drive roller 15 across the moving handrail 8 (on the front side as the moving handrail 8), guide rollers 6 for guiding the moving handrail 8 are disposed, and the guide rollers 6 are connected in pairs. A spring 18 connected at 17 and perpendicular to the moving handrail 8
is pressurized. In addition, 19 is an idler of the first moving handrail chain 6'. Therefore, the movable handrail 8 has a spring 1
8, it is pinched between the guide roller 6 and the drive roller 15, and is compressed and fed by the frictional driving force of the drive roller 15. In such a driving device 12 for the moving handrail 8, there is no need for a tension device that applies tension to the moving handrail 8, and the number of bends in the moving handrail 8 is greatly reduced. Since the internal resistance and the resistance between the deck 11 and the guide generated by the tensioning device are reduced, the overall running resistance of the moving handrail 8 is reduced, and the moving handrail 8 can be driven with less driving force. Therefore, the problem of the drive roller 15 idling, that is, the movable handrail 8 not moving, is eliminated.
Furthermore, by reducing the number of bent parts, the movable handrail 8 can be shortened accordingly, and manufacturing costs can be reduced. However, in the drive device 12 of FIG.
5 and the guide roller 16 have small diameters, the movable handrail 8
In order to provide the necessary driving force of , it is necessary to make the clamping force of the guide roller 16 by the spring 18 considerably large.

For this reason, when you stop the escalator and start it up the next morning, the guide roller 16 will leave dents on the surface of the handrail 8 in the area that was squeezed during the stop, that is, on the surface of the handrail 8 that is generally made of decorative rubber or the like. However, there remained the problem that this significantly impairs the design of the movable handrail 8, that it does not restore its original shape even after long-term operation, or that the material at the dented portion deteriorates, thereby affecting its lifespan. In order to prevent this dent mark as much as possible, even in the above proposal, the guide roller 1
It has been proposed that the outer periphery of the surface of 6 be made of an elastic material such as rubber, but this has not necessarily solved the problem of dents.

In addition, some structures have been proposed and put into practical use in which the clamping force of the moving handrail 8 is weakened while the escalator is stopped, but these structures are extremely complicated. An object of the present invention is to provide a structure that effectively solves the problem of the above-mentioned pinch drive device without complicating it. is provided, and the driving roller is configured to be pressed against the moving handrail by a component of the tension of the chain, etc., generated when driving this driving mechanism.

An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 3, it is conventional that the power of the drive machine 2 is transmitted to the first moving handrail chain 6', and that the front and back sides of the moving handrail 8 are conveyed under pressure by each pair of drive rollers 5 and guide loaf 16. Although the structure is the same, the structure of the drive device 12' is different from the conventional one. That is, in FIG. 4, the driving device 12' is composed of fixed plates 21a, 21b and a movable plate 22, and the fixed plates 21a, 21b are fixed to the truss frame 1.

A guide roller 16 is rotatably attached to the fixed plates 21a and 21b, and is in contact with the movable handrail 8. Movable plate 2
2 is driven to a position corresponding to the guide roller 16. -ra15
is arranged, and this drive roller 15 has a sprocket 23 driven by the second moving handrail chain 14,
They are rotated coaxially and integrally via a movable plate 22. The second handrail chain 14 meshes with each Z sprocket 23, and also endlessly meshes with an adjustment sprocket 24 that adjusts the elongation of the chain 14 and a transmission sprocket 201 that is a rotational drive source. The transmission sprocket 20 rotates via a movable plate 22 coaxially with a drive sprocket 13 driven by the first handrail chain 6'Z. Further, as shown in FIG. 5, the sprocket 23, the adjusting sprocket 24, and the conductive sprocket 20 are arranged on the back side of the movable plate 22 with respect to the manual handrail 8, and are connected by a second moving handrail chain 14.

Further, the drive sprocket 13 is located approximately in the center of the moving handrail 8 in the inner direction, and is disposed on the lower side of the moving handrail 8. On the other hand, as shown in FIGS. 4 and 6, the movable plate 22 has a rail surface M guided by grooved rollers 25 attached to the fixed plates 21a and 21b by shafts 26 in the direction of pinching the movable handrail 8. It is configured so that it can be moved.

Next, the operation of the drive device 12' will be explained.

The drive roller 15 is driven by its own weight, the weight of the movable plate 22, or each sprocket 13 provided on the movable plate 22.
Due to the weight of the members 20, 23, 24, etc., the movable handrail 8 is constantly pressed against the guide roller 16 while being guided by the grooved roller 25. However, since this clamping force is due to the above-mentioned own weight, the clamping force on each drive roller 15 is extremely small. Now, when the drive machine 2 starts and rotates, the step sprocket 4 and the moving handrail sprocket 5 are rotated by the drive chain 3, thereby transmitting power to the first moving handrail chain 6'. Here, to describe only the rotation order, "the first moving handrail chain 6' rotates the transmission sprocket 20 at the same time as the drive sprocket 13, and the second moving handrail chain 14 is driven. Needless to say, each sprocket 23 rotates at the same time due to the drive roller 14, and the drive roller 15, which is an integral part of the vehicle, rotates at the same time.On the other hand, as described above, the drive roller 15 lightly presses the handrail 8 with its own vehicle. In general, the coefficient of friction between the two is set to be large.

Therefore, when trying to rotate the drive roller 16, a frictional resistance force is generated due to its clamping force and friction coefficient, and the sum of the frictional resistance forces on each drive roller 15 is equal to the tension of the second moving handrail chain 14. and conduction sprocket 2
The rotational resistance becomes 0. This rotational resistance becomes the rotational resistance of the drive block 13 that rotates together, so the tension T, (fourth
(as shown in the figure). When tension T is generated here, a component force L acts on the movable direction of the movable plate 22, so that the component force L causes the movable plate 22 and the driving roller 15 integrally attached thereto to move further toward the movable handrail 8. Acts in the direction of squeezing. As a result, the moving handrail 8 of the drive roller 15
, the frictional resistance increases by the increased amount, the rotational resistance of the transmission sprocket 20 and the drive sprocket 13 increases, and the tension T of the first moving handrail chain 6' increases.
, and its component force T2 also increases in the same way and is converted back into the clamping force of the drive roller 15. Since such a repeated conversion action is instantaneously performed until the frictional driving force necessary to start the moving handrail 8 is generated, the driving loaf 15 is activated almost simultaneously with the start of rotation of the first moving handrail chain 6'. A necessary frictional driving force is generated between the movable handrail 8 and the movable handrail 8, and the movable handrail 8 starts moving. On the other hand, when the escalator stops, the drive machine 2 gradually stops using an electromagnetic brake or the like, and the movement of the first handrail chain 6' or the handrail 8 also stops, but at that moment moving handrail chain 6', 14,
And tension remains in the movable handrail 8 on the side that was previously tensioned. However, those chains 6', 14,
Since the movable handrail 8 is dimensionally slackened in advance, the tension is zero on the side opposite to the side where it was stretched. Therefore, when the escalator completely stops, the sliding resistance between the moving handrail 8 and the guide portion of the deck 11 becomes zero, so the slack gradually moves to the tension side and acts to release the tension imbalance. As a result, the escalator gradually begins to move in the same direction as the original direction of movement.This reversal action is also assisted by the unbalanced relationship between the tensions of the chains 6' and 14.As a result, the escalator stops completely. rear,
As a reversal action occurs and the tension of the first and second handrail chains 6', ]4 is released, the component force L that was pulling the movable plate 22 is also released, and the movable plate 22 returns upward. As a result, the clamping force of the drive roller 15 against the moving handrail 8 is reduced and becomes only the original weight. Furthermore, when the escalator is reversed, a tension force T is generated on the opposite side of the first handrail chain 6', but the component force T2 similarly acts to lower the movable plate 22 downward. The moving handrail 8 can be moved regardless of the driving direction.

According to the above embodiment, the component force T2 of the tension T of the first handrail chain 6' generated when the escalator is started
This causes the drive rollers 15 to generate the driving force necessary to move the handrail 8, so that the handrail 8 starts running smoothly, and when the escalator is stopped, the force of the drive rollers 15 decreases. Since only the weight of the movable plate 22, etc. is taken up by itself, there are almost no dents in the decorative rubber on the surface of the movable handrail 8 even if the movable handrail 8 is stopped for a long time. is obtained.

In the above embodiment, the clamping force of the drive roller 15 while the escalator is stopped is generated by the weight 3 of the movable plate 22 and the like.

However, if this dead weight is too vertical, the drive roller 5 will idle at the time of startup, and the movable handrail 8 may not be able to travel. In such a case, as shown in FIG.
The same kind of problem can be easily solved by pressurizing the spring 27 in advance and using an elastic body such as the spring 27. Conversely, by using the spring 27 in combination, the movable plate 22 and the like can be made lighter and maintainability can be improved. Here, if an elastic body such as a spring 27 is used in combination with the movable plate 22, the pressure on the scales of the drive roller 5 while it is stopped will increase, and the dents in the paper rubber on the surface of the movable handrail 8 will become larger. In this case, the problem can be solved by making the surface of the guide roller 6 made of rubber or the like, or by placing a belt made of rubber or the like between the guide rollers 16 as shown in FIG. Furthermore, in the above-described embodiment, the drive sprocket 13 is arranged below the moving handrail 8, approximately in the middle of the moving handrail 8, and at the center of the arrangement of the drive rollers 15. However, as shown in FIG. 9, the purpose can be achieved even if the driving sprocket 13 is placed above the handrail 8 and shifted from the center of the handrail 8 in the middle direction. However, by arranging the drive sprocket 13 below the movable handrail 8, the oil supplied to the first movable handrail chain 6' is prevented from being splashed onto the movable handrail 8, and the movable handrail 8 is prevented from being oil-filled. This has the effect of preventing problems such as getting dirty and spoiling the appearance. In addition, by arranging the drive sprocket 13 almost at the center of the moving handrail 8, the tension point by the first moving handrail chain 6' and the pressure point on the moving handrail 8 by the drive roller 15 are on a vertical line. As a result, since the movable plate 22 is not tilted in the plate thickness direction, the grooved roller 25 can be rotated smoothly without any thrust force or twisting force being generated in the grooved roller 25. Similarly, by arranging the drive sprocket approximately at the center of the arrangement of the drive rollers 15, tilting of the movable plate 22 in the longitudinal direction is prevented, resulting in the effect that the movable plate 22 moves smoothly. Also, in FIG. 4, idler 19
By changing the positions of a and 19b, the angle 6 between the first movable handrail chain 6' and the movable direction of the movable plate 22 is changed, and thereby the first movable handrail chain 6
The component force T2 generated by the tension T, ' can be adjusted.

For example, if the installation height of the escalator is high, the total length of the movable handrail 8 will also be long, and the required driving force of the movable handrail 8 will be correspondingly large. In such a case, the idlers 19a, ! 9b, and conversely, when the required driving force of the moving handrail is small, the idlers 19a and 19b are arranged so as to increase the angle 6. In this way, the angle 8 is adjusted by the arrangement of idlers 19a and 19b,
If the driving force is matched to the required driving force of the movable handrail 8, it is possible to achieve the effect that the movable handrail 8 can be moved smoothly without straining the movable handrail 8. In the above explanation, a case in which a chain is used as the endless bodies 6', 14 has been described, and therefore a drive sprocket has been explained as drive theory 13. The effect can be obtained. Therefore, any endless body and its corresponding drive wheel may be used. Furthermore, although the driving roller 15 has been described as a method of driving the moving handrail 8, the purpose can also be achieved by winding a belt around that portion and driving the belt, and any rotating body is within the scope of the present invention. Although the above has been described for outside the Escarais, the same applies to all passenger conveyors such as electric walkways.

ZAs described above, according to the present invention, even if the moving handrail is stopped for a long time,
Since there are no dent marks on the decorative rubber surface, the aesthetic appearance is not impaired when it is re-erected, and the life of the movable handrail can be prevented from being shortened. In addition, since the force is transmitted to the drive roller through the Z drive mechanism provided at the center of the movable plate, a remarkable effect is achieved in that the clamping force is uniformly applied to the drive roller.

[Brief explanation of drawings]

Figures 1 and 2 are side views showing a drive device for a handrail of an escalator, Figures 3 to 6 show an embodiment of the present invention, and Figure 3 is a side view similar to Figure 1. , FIG. 4 is a detailed view of the drive device, FIG. 5 is a sectional view taken along line 1-1 in FIG. 4, FIG. 6 is a perspective view taken along line D-0 in FIG. 4, and FIGS. 7 and 8 are detailed views similar to FIG. 4, and FIG. 9 is a sectional view similar to FIG. 5, showing another embodiment. Explanation of symbols, 6'...First endless body, 8...
・Movable handrail, 12, 12'... Drive device, 13
...Drive theory, 14...Second endless body,
15, 16...Rotating body, 27...Elastic body,
T...Tension of the endless body, L...Component force. Group map, Figure 2, Figure 3, Figure 6, Figure 7, Figure 8, Figure 8.

Claims (1)

[Scope of Claims] 1. A movable plate equipped with a plurality of driving rollers in the longitudinal direction of the movable handrail is provided on one of the front and back sides of the movable handrail, and a fixed plate equipped with a plurality of guide rollers on the other side, and In the movable handrail driving device, a sprocket is provided coaxially with the agitation roller, a second endless body is wound around the sprocket, and the movable handrail is moved by driving the second endless body. A driving wheel around which the second endless body is wound is provided at the center of the movable plate on which the driving rollers are provided, and the first endless body that drives the driving wheel is wound around this driving wheel, but The movable plate is moved via the drive wheel by the tension component of the first endless body generated when the drive roller is driven, and the drive roller is configured to clamp the movable handrail. Driving device for moving handrails. 2. The movable handrail device according to claim 1, wherein the drive roller and movable plate are located above the movable handrail, and the drive wheel is located below the movable handrail. 3. A movable plate equipped with a plurality of drive rollers in the longitudinal direction of the movable handrail is provided on one side of the front and back of the movable handrail, and a fixed plate equipped with a plurality of guide rollers is provided on the other side, and the fixed plate is provided coaxially with the drive roller. In the movable handrail driving device, the movable handrail is provided with a sprocket, a second endless body is wound around the sprocket, and the movable handrail is moved by driving the endless body. A driving wheel around which the second endless body is wound is provided in the center of the plate, and a first endless body that drives the driving wheel is wound around this driving wheel, thereby driving the driving wheel. The movable plate is moved via the drive wheel by the tension component of the first endless body generated when the drive roller clamps the movable handrail,
Furthermore, the device for driving a movable handrail is characterized in that it is configured such that the tension direction of the first endless body can be changed in order to make the clamping pressure variable.