JPS633824B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to escalators and the like, and particularly to a drive device for a moving handrail.

[Background of the invention]

Moving handrails on passenger conveyors such as escalators, etc.
If there are many bends on the running road, the internal resistance will increase with the bends, the overall running resistance will increase, and a large driving force will be required. 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 with reference to FIG. 1 using an escalator. 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 integrally mounted with the step sprocket 4. This drives the moving handrail chain 6 and rotates the drive wheel 7. On the other hand, the moving 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 slides on the top or the guide of the deck 11.

In this way, the moving handrail 8 is connected to the reversing section 10 and the driving wheel 7
Alternatively, if the guide roller 9 or even the movable handrail 8 (not shown) is bent forward or backward by a tensioning device or the like for applying tension, a large driving force is required because the internal resistance due to the bending increases. That will happen. Particularly in the cold winter, moving handrails 8
As it hardens, internal resistance due to bending increases, and as a result, if the coefficient of friction on the surface of the drive wheel 7 decreases, problems will occur in which only the drive wheel 7 will idle and the handrail 8 will not move. There was a problem that this could result in personal injury to 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.

In an attempt to solve this problem, as shown in FIG.
It was proposed to drive the motor in a nearly straight line. 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 presses and drives the front and back of the moving handrail 8 is different. It's on. That is, the drive device 12 drives the first handrail chain 6'
a drive sprocket 13 that rotates under the power of
The rotational force of the drive sprocket 13 causes a second moving handrail chain 14 to rotate a drive roller 15 that is integrally mounted on the sprocket. on the other hand,
Guide rollers 16 for guiding the moving handrail 8 are disposed on the opposite side of the drive roller 15 (on the front side as the moving handrail 8), sandwiching the moving handrail 8, and the guide rollers 16 are arranged in pairs with connecting links 17. They are connected and pressurized by a spring 18 perpendicular to the moving handrail 8. In addition, 19 is the first moving handrail chain 6'
This is the idler. Therefore, the movable handrail 8 has a spring 1
8, the paper is clamped between the guide roller 16 and the drive roller 15, and is conveyed by the frictional driving force of the drive roller 15. In such a drive 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.
The internal resistance of the moving handrail itself due to bending and the sliding resistance of the deck 11 against the guide caused by the tension of the tensioning device are reduced, so the overall running resistance of the moving handrail 8 is reduced, and the moving handrail 8 can be moved with less driving force. Since the drive roller 15 can be driven
The trouble of 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 shown in FIG. 2, since the drive roller 15 and the guide roller 16 have small diameters, in order to provide the necessary driving force for the moving handrail 8, the clamping force of the guide roller 16 by the spring 18 must be considerably increased. It is necessary to do so. Therefore, when the escalator is stopped and started the next morning, dents from the guide roller 16 remain on the surface of the handrail 8 in the part that was pressed while it was stopped, that is, on the surface of the handrail 8 that is generally made of decorative rubber or the like. This significantly impairs the design of the moving handrail 8, and there remains the problem that it will not recover even after long-term operation, or that the material at the dented portion will deteriorate, thereby affecting its lifespan.

In order to prevent these dent marks as much as possible, the above-mentioned proposal also proposes that the outer periphery of the surface of the guide roller 16 be made of an elastic material such as rubber, but the dent marks have not necessarily been eliminated. In addition, some structures have been proposed and put into practical use in which the clamping pressure of the moving handrail 8 is weakened while the escalator is stopped, but these structures are extremely complicated.

[Purpose of the invention]

An object of the present invention is to provide a movable handrail drive device that has a simple configuration and can generate a small clamping force on the movable handrail when stopped, and uniformly generates the necessary clamping pressure during operation.

[Summary of the invention]

The present invention provides a plurality of guide rollers that support the lower surface of a movable handrail and are pivotally supported by a fixed member, a plurality of drive rollers that are in contact with the upper surface of the movable handrail that opposes the guide rollers, and a plurality of drive rollers that are pivotally supported on the movable handrail. a movable frame movably guided in the thickness direction of the movable handrail;
In the movable handrail driving device, the movable handrail is moved by a second endless body wound around a sprocket provided coaxially with the drive roller, and the movable handrail is moved by driving the second endless body. An extending portion is provided in the center of the movable frame on the side where the guide roller is located beyond the movable handrail, and a rotating body is provided on the extending portion of the movable frame, and power from the driving machine is transmitted to the rotating body. A rotary body is provided in which the first endless body is wound around the movable frame extending portion from the forward side, and the second endless body is wound coaxially with the rotary body.

[Embodiments of the invention]

An embodiment of the present invention will be described in detail below with reference to the drawings. In FIG. 3, the power of the driving machine 2 is transmitted to the first moving handrail chain 6', which is a first endless body, and the upper and lower surfaces of the moving handrail 8 are connected to a pair of driving rollers 15 and a pair of guide rollers 16, respectively. It is the same as the conventional method, but the drive device 1
The structure of 2' is different from the conventional one.

That is, in FIG. 4, the drive device 12' is composed of fixed plates 21a and 21b and a movable plate 22.
The fixed plates 21a and 21b are fixed to the truss frame 1. A guide roller 16 is rotatably attached to the fixed plates 21a and 21b, and the movable handrail 8
It supports the bottom surface of. A drive roller 15 is arranged on the movable plate 22 at a position opposite to the guide roller 16. They are rotated coaxially and integrally via a plate 22. The second moving handrail chain 14 meshes with each sprocket 23, and is endlessly meshed with an adjustment sprocket 24 that adjusts the elongation of the chain 14, and a conduction sprocket 20 that is a rotational drive source. The transmission sprocket 20 is configured to rotate integrally and coaxially with a rotating body 13 driven by the first moving handrail chain 6' via a movable plate 22.
It should be noted that the movable plate 22 is provided with an extending portion in the center thereof on the side where the guide roller 16 is located beyond the moving handrail 8, and the rotating body 13 is pivotally supported on this extending portion. Further, the first movable handrail chain 6' is routed from the forward end of the extending portion of the movable plate 22 and wound around the rotating body 13.

Also, as shown in Fig. 5, the sprocket 23
Adjustment sprocket 24 and conduction sprocket 2
0 is arranged on the back side of the movable plate 22 with respect to the movable handrail 8, and is connected by a second movable handrail chain 14. Further, the rotating body 13 is located approximately at the center of the movable handrail 8 in the width direction, and is arranged below the movable 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 clamping direction of 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 and by the movable plate 22.
or the rotating body 1 provided on the movable plate 22
3. Due to the weight of each sprocket 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 pressure is due to the above-mentioned own weight, the clamping pressure on each drive roller 15 is extremely small. Now, when the drive machine 2 starts and rotates, the drive chain 3 rotates the step sprocket 4 and the moving handrail sprocket 5, which causes the first
Power is transmitted to the moving handrail chain 6'. To describe only the rotation order here, the first moving handrail chain 6' rotates the transmission sprocket 20 at the same time as the driving sprocket 13, and the second moving handrail chain 14 is driven by this second moving handrail chain. Needless to say, each sprocket 23 rotates at the same time by means of the sprocket 14, and the coaxial drive roller 15 rotates at the same time.

On the other hand, as described above, the driving rollers 15 lightly press against the moving handrail 8 due to their own weight, and the coefficient of friction between the two is generally set to be large. Therefore, when trying to rotate the drive roller 15, a frictional resistance force is generated due to the clamping pressure and the coefficient of friction, 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. This results in rotational resistance of the conduction sprocket 20. This rotational resistance becomes the rotational resistance of the rotating body 13 that rotates coaxially, so the first
Tension T ₁ in the moving handrail chain 6' (as shown in Fig. 4)
is converted to When the tension T ₁ is generated here, a component force T ₂ acts on the moving direction of the movable plate 22 (moving handrail clamping pressure direction), so the component force T ₂ causes the movable plate 22 to be attached integrally with the movable plate 22. The driving rollers 15 that are present further act in a direction that clamps the moving handrail 8. As a result, the clamping pressure of the drive roller 15 against the moving handrail 8 increases, and the frictional resistance increases by the increased amount, increasing the rotational resistance of the transmission sprocket 20 and the rotating body 13, and the rotational resistance of the first moving handrail chain 6' increases. This is converted into an increase in the tension T ₁ , and its component force T ₂ also increases in the same way, and is converted back into the clamping pressure of the drive roller 15 . Since such a repetitive conversion action is instantaneously performed until the frictional driving force necessary to start the moving handrail 8 is generated, the driving roller 1 is activated almost simultaneously with the start of rotation of the first moving handrail chain 6'.
The necessary frictional driving force is generated between 5 and the moving handrail 8,
The moving handrail 8 will start moving.

On the other hand, when the escalator stops, the driving machine 2 gradually stops using an electromagnetic brake, etc., and as a result, the first
The movement of the moving handrail chain 6' or the moving handrail 8 also stops, but at that moment there is no tension in the first or second moving handrail chain 6', 14 and the moving handrail 8 on the side that was tensioned until then. is left behind. However, those chains 6′, 1
4 and the movable handrail 8 are dimensionally slackened in advance, so the tension is zero on the side opposite to the stretched side. Therefore, when the escalator comes to a complete stop, the sliding resistance between the moving handrail 8 and the guide portion of the deck 11 becomes zero, so that the slack gradually moves to the tension side and releases the tension imbalance. As a result, it gradually begins to move in the same direction as the original direction of travel. This reversal action is also assisted by the unbalanced tension relationship between the chains 6' and 14. Therefore, after the escalator has completely stopped, a reversal action occurs and the tension in the first and second handrail chains 6' and 14 is released, so that the component force _T2 that was pulling the movable plate 22 is reduced. is also released, the movable plate 22 is returned upward, and the clamping pressure of the drive roller 15 against the moving handrail 8 is reduced.
Only the original weight will be left.

In addition, when the escalator is reversed, tension is applied to the opposite side of the first moving handrail chain 6'.
T ₁ is generated, but its component force T ₂ is similarly applied to the movable plate 2.
2, the handrail 8 can be moved regardless of the driving direction.

According to the above embodiment, the tension in the first handrail chain 6' that occurs when the escalator is started is
The component force T ₂ of T ₁ causes the driving roller 15 to generate the driving force necessary to move the moving handrail 8, so that the moving handrail 8 starts running smoothly, and
When the escalator is stopped, its drive roller 15
The clamping pressure of the handrail 8 is reduced and only the weight of the movable plate 22, etc. is used, so even if the handrail 8 is stopped for a long time, there are almost no dent marks on the decorative rubber on the surface of the handrail 8, and the problems of the conventional system are extremely simple. The effect of eliminating the problem with the device can be obtained. Further, a rolling part is provided in the center of the movable plate 22 to roll the rolling part to the guide roller 16 side below the movable handrail 8, and the rotary body 13 is provided here and the first rolling part is provided.
Since the moving handrail chain 6' is used to pull the moving handrail downward, a uniform clamping pressure is applied to the upper surface of the moving handrail 8 via the plurality of drive rollers 15, and as a result, the moving handrail can be moved safely. It can be performed.

In the above embodiment, the clamping pressure of the drive roller 15 while the escalator is stopped is generated by the weight of the movable plate 22 and the like. However, if this weight is too light, the drive roller 15 will idle during startup, and the movable handrail 8 may not be able to travel. In such a case, the same kind of problem can be easily solved by using an elastic body such as a spring 27 which pressurizes the movable plate 22 in advance as shown in FIG. 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 clamping force of the driving roller 15 while it is stopped will increase, and the dents in the decorative rubber on the surface of the movable handrail 8 will become larger. In this case, the surface of the guide roller 16 is made of rubber, etc.
Alternatively, as shown in FIG. 8, the problem can be solved by passing a belt made of rubber or the like between the guide rollers 16.

Furthermore, in the above embodiment, the rotating body 13 is arranged below the movable handrail 8, approximately at the center in the width direction of the movable handrail 8, and at the center position of the arrangement of the drive rollers 15. As shown in FIG.
The purpose can be achieved even if it is placed above the handrail 8 and shifted from the center in the width direction of the moving handrail 8. However, rotating body 1
3 is placed below the movable handrail 8, the oil supplied to the first movable handrail chain 6' is prevented from scattering onto the movable handrail 8, and the movable handrail 8
This has the effect of preventing problems such as staining with oil and spoiling the appearance. In addition, by arranging the rotating body 13 at approximately the center of the width direction of the moving handrail 8,
The tension point of the first moving handrail chain 6' and the clamping pressure point of the driving roller 15 on the moving handrail 8 are on a vertical line, and as a result, the movable plate 22 is not tilted in the thickness direction. The grooved roller 25 does not generate thrust force or twisting force on the roller 25.
The effect is that the can be rotated smoothly.
Similarly, by arranging the drive sprocket approximately in the center of the array of drive rollers 15, the movable plate 22
It is possible to prevent tilting of the movable plate 22 in the longitudinal direction, and to smoothly move the movable plate 22.

In addition, in FIG. 4, the idlers 19a, 19
By changing the position of b, the angle θ between the first moving handrail chain 6' and the movable direction of the movable plate 22 is changed, whereby the tension T ₁ of the first moving handrail chain 6' is The generated component force T ₂ 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 and 19b are arranged so that the angle θ is small, and conversely, when the required driving force of the moving handrail is small, the idlers 19a and 19b are arranged so that the angle θ is made large. In this way, by adjusting the angle θ by arranging the idlers 19a and 19b and matching it 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 sprocket has been exemplified and explained as the rotary body 13. However, without being limited to this, for example, a V-belt etc. The same effect can be obtained. Therefore, any endless body and its corresponding rotating body 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 moving handrail 8 with a belt.

Although the above was about escalators,
The same applies to all passenger conveyors such as electric passages.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to obtain a movable handrail drive device with a simple configuration that can apply a small clamping pressure when stopped and uniformly apply the necessary clamping pressure during operation. Even if the machine is stopped for a long time, there will be no dents on the decorative rubber surface. Therefore, it is possible to achieve the effect that the aesthetic appearance is not impaired when restarting, and the life of the movable handrail can be prevented from decreasing.

[Brief explanation of the drawing]

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 of Fig. 4, and Fig. 6 is a - of Fig. 4.
7 to 9 show other embodiments of the present invention, FIGS. 7 and 8 are detailed views similar to FIG. 4, and FIG. 9 is a detailed view similar to FIG. 5. FIG. 6'...first endless body, 8...movable handrail, 12,
12'... Drive device, 13... Rotating body, 14...
Second endless body, 15, 16...roller, 27...
Elastic body, T ₁ ...Tension of endless body.

Claims (1)

[Claims] 1 A plurality of guide rollers that support the lower surface of the movable handrail and are pivotally supported by a fixed member, a plurality of drive rollers that contact the upper surface of the movable handrail that opposes the guide rollers, and a plurality of drive rollers that pivotally support the drive rollers and that are pivotally supported by the movable handrail. a movable frame guided so as to be movable in the thickness direction; a second endless body wound around a sprocket provided coaxially with the drive roller; and by driving the second endless body, the movable handrail can be moved. In the movable handrail drive device, an extending portion is provided in the center of the movable frame on the side where the guide roller is located beyond the movable handrail, and a rotating body is provided in the extending portion of the movable frame. a first endless body for transmitting power from a driving machine to the rotary body is wound around the movable frame extending portion from the forward side, and the second endless body is coaxially connected to the rotary body. A moving handrail drive device characterized by having a rotating body wrapped around it.