JPS6129314B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mobile handrail drive for an escalator or moving walkway. Although escalators will be described below, the same applies to moving walkways.

As shown in FIG. 1, the escalator transports passengers by moving the steps 1 and the handrails 3 on the handrails 2 at the same speed between the upper and lower entrances 4.

The steps 1 and the handrail 3 are generally driven by a drive machine 6 installed in the machine room of the truss 5 on the upper floor.
a small drive sprocket 8 attached to the output shaft 7;
The step drive mechanism and handrail drive mechanism are actuated by rotating the large drive sprocket 11 on the drive shaft 10 via the drive chain 9.

The step drive mechanism includes a step sprocket 13 that drives a step chain 12 that connects each step 1, and guide rails 14, 15, 16 that guide the steps 1.
17 and 18, and the step 1 has a front wheel shaft 19 inserted into the step chain 12, as shown in the schematic cross-sectional view of the drive shaft 10 in FIG. The step chain 12 is connected endlessly between two step sprockets 13 installed symmetrically with respect to the center of the escalator width and a driven step sprocket (not shown) provided on the lower floor side. , front wheel 20, rear wheel 2
1 moves along guide rails 14-18.
At this time, the tread of each step 1 always remains horizontal,
It transitions into a stair-like pattern on the slope and horizontally on the upper and lower floors. For this reason, the roughly triangular step 1 has a front wheel 2.
0 and the rear wheel 21 are on the same plane.
8, and on the upper and lower floors, the first
Guide rail 1 is bifurcated as shown in the figure.
A front wheel guide rail 17 and a rear wheel guide rail are configured to move along the curvature and horizontal portions of 4 and 15, and minimize the space occupied by the step 1 within the truss 5 on the return side. 16.

On the other hand, the handrail drive mechanism, as shown in FIG.
4. The handrail drive wheel 26 is rotated via the shaft 25, and the movable handrail 3 is wound around it and driven by its frictional force. (Hereinafter, this method will be referred to as the wrap drive method.) In recent years, there has been a growing social demand to reduce the installation area of escalators, expand the effective area of buildings, and utilize buildings more efficiently.

However, since the step drive mechanism and the handrail drive mechanism are generally driven by drive wheels provided in the truss on the upper floor side, the step sprocket 13, the handrail sprocket 22, and the large drive sprocket, as shown in FIG. 11 are installed at appropriate intervals so as not to interfere with each other, and are spread out in the width direction, making it difficult to reduce the truss width.

In particular, in the handrail drive mechanism, as shown in FIGS. 1 and 3, the handrail drive wheel 26 that drives the movable handrail 3 and the handrail drive sprocket 24 are coaxially fixed, so that the width of the movable handrail 3 and the handrail drive The width was required to be the sum of the width of the sprocket 24 and the width of the base 27 that supports them. Furthermore, the handrail chain 23 had to be spaced outward so as not to interfere with the large drive sprocket 11 and the movable handrail 3.

In particular, in the handrail wrapping drive system shown in FIG. Since the handrail drive wheel 26 is installed inside the truss 5 of the escalator, the moving handrail 3 is connected to the guide rail 1.
4, 15, and 18, and as shown in FIG. 3, the widthwise positions of the trusses had to be spaced apart from each other without overlapping each other.

Therefore, as shown in FIGS. 2 and 4, each sprocket position on the drive shaft 10 is such that the position of the handrail sprocket 22 is such that the handrail chain 23 or the movable handrail 3 does not interfere with the guide rails 14 to 18. The large drive sprocket 11 is located at a certain distance on the outside of the truss, and as a result, the large drive sprocket 11 is located between the handrail sprocket 12 and the step sprocket 13, which is convenient for minimizing the total width of the escalator, between the guide rails 14 and 14. 1
In general, it was arranged at a position where it did not interfere with 8. Based on these results, the total width of the escalator for a predetermined step width was determined.

In addition, in some escalators, in order to narrow the escalator width, a handrail sprocket 22 is installed (not shown) in the center of the step sprockets 13 on both sides (almost on the center line in the longitudinal direction of the escalator), and from this the handrail sprocket 22 is installed. A method is used in which the shaft 25 is used as an integral shaft of the right and left handrail drive wheels 26 to transmit power to the handrail drive sprocket attached to the shaft 25 using a chain. Drop onto the steps on the return side,
This was not very practical as it seriously soiled the steps.

In consideration of the above-mentioned points, the present invention reduces the total width of the escalator for a given step width, without staining the steps with chain lubricating oil, etc.
Furthermore, it is an object of the present invention to provide a handrail drive device that can reduce the width and depth of an escalator by reducing the diameter of the step sprocket and not configuring the handrail sprocket in the center.

An embodiment of the present invention will be described below with reference to the drawings. 4 and 5, the handrail sprocket 22 on the drive shaft 10 is shown in FIG.
0, the upper front wheel guide rail 14 is located outside the step sprocket 13.
A large drive sprocket 11 is installed below the front wheel guide rail 17 on the return side of the lower tier, and a large drive sprocket 11 that obtains additional power is attached to the handrail sprocket 22 on one side.
Provided on the outside of the

Furthermore, in FIG. 4, 32 is an upper handrail drive wheel of the linear drive type handrail device whose small diameter surface is covered with an elastic body or a material with a high coefficient of friction;
Reference numeral 33 denotes a lower handrail drive wheel, in which a plurality of upper and lower rollers are arranged. 34 is the upper handrail drive wheel 3
This is a small diameter handrail drive sprocket installed coaxially with 2. Further, 35 is a compression spring that applies an upward force to the lower handrail drive wheel 33, thereby generating a force that pinches the upper and lower drive wheels, and pinches the movable handrail 3 sandwiched between them. At this time, the handrail drive device is arranged so that the moving handrail 3 does not sink below the surface of the guide rail 18, so as shown in FIG. You can send it to As a result, the handrail drive device can be installed so that the handrail drive sprocket 34 approaches the extension of the large drive sprocket 11 as shown in FIG.

Furthermore, in FIG. 4, 36 is an idler;
7 is a tension idler for stretching the chain.

In FIGS. 4 and 6, 38 is a relay idler device which is sandwiched between the upper front wheel guide rail 14 and the lower return side front wheel guide rail 17, and is provided outside the upper and lower rear wheel guide rails 15 and 16. Each handrail drive device on the left and right side of the escalator is equipped independently, so
The left and right sides can be moved independently and freely in the horizontal direction using studs 39. Reference numeral 40 denotes a sprocket attached to the relay idler device, which is attached coaxially and rotates synchronously.As shown in FIG. 41 is a handrail sprocket 34 of the handrail drive section
It is located on the extension line of

By arranging the handrail sprocket 27 on the drive shaft 31, the two sprockets of the relay idler device 38, and the handrail drive sprocket 34 as described above, the handrail driving force is transmitted by the handrail sprocket 22 on the drive shaft 10 to the front of the upper stage. Theory guide rail 14 and lower return side front wheel guide rail 17
Sandwiched between the upper and lower rear wheel guide rails 15,1
The first handrail chain 42 passes through the side space of 6.
to one sprocket 40 of the relay idler device 38, which rotates the other sprocket 41, and then through the second handrail chain 43 to the handrail drive sprocket 34, which rotates the handrail. The upper handrail drive wheel 32 of a pair of rollers 32 and 33 sandwiching the handrail 3 is rotated to drive the movable handrail 3.

According to the invention, the handrail sprocket 22 includes:
On the outside of the step sprocket 13, the upper front wheel guide rail 14 and the lower return side front wheel guide rail 1
By placing the large drive sprocket 11 on the outside of the drive shaft 10, which is sandwiched between the handrail sprockets 10 and 7, the width of the drive shaft is narrowed by the part where the handrail sprocket was previously attached. In addition, by using the handrail linear drive method as the handrail drive method and installing the handrail drive unit so that the moving handrail 3 does not cross the guide rail 14, the entire handrail drive unit does not interfere with the steps 1. By placing the handrail drive part close to the guide rails 14 and 18 on the center side of the escalator, the overall width of the handrail drive part is made almost equal to the width of the narrowed drive shaft 31, and as shown in Fig. 2. As shown in FIG. 5, the overall width of the escalator for a given step width can now be reduced by (A+A) compared to the conventional method.

Further, in the present invention, the relay idler device 38
Since the left and right chains are separated separately and configured to be movable in the horizontal direction, the relay idler device 38 can be set in accordance with the extension of the respective left and right chains, and the tension idler 3 for elongation of the handrail drive section can be set.
By adjusting 7, the correct chain tension can be easily obtained.

In the present invention, the sizes of the first handrail chain 42 and the second handrail chain 43 are set to be larger than the size necessary for power transmission according to the floor height of the escalator, but in general, the larger the chain size, the less elongation occurs. , the first handrail chain 42 has a long service life and is significantly superior in terms of maintenance.
The width of the second handrail chain 43 is sufficient because it is within the width of the guide rail 15 (generally 40 mm).
We will choose a form that is one or two ranks higher.

Therefore, in the present invention, power for driving the moving handrail is provided by the relay idler device 38 and two handrail chains 42 and 43 on one side, and the drive shaft 1
A handrail sprocket 27 is placed on the outside of the step sprocket 13, which is a part that has not been used in the past, and is sandwiched between the upper and lower front wheel guide rails 14, 17, and the width of the drive shaft is adjusted to match the handrail sprocket. On the other hand, as the handrail linear drive system of the handrail drive device, the position of the handrail drive sprocket is changed to the drive large sprocket 11.
By making the handrail drive part almost the same width as the drive shaft 31, the total width of the escalator can be reduced for a given step width, and the step sprocket can also be made smaller in diameter, making the escalator smaller. The space occupied by the escalator compared to the building can be reduced. In addition, since the moving handrail is driven linearly above the front wheel guide rail, energy loss can be reduced as there is no bending resistance of the moving handrail.Furthermore, the moving handrail can be easily attached and detached, and the lower side of the truss Great advantages can be obtained, such as by changing the shape from C in FIG. 1 to a simple structure shown in D in FIG. 4.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional front view of a conventional escalator, FIG. 2 is a view taken along the - line in FIG. 1, FIG. 3 is a view taken along the - line in FIG. Figure 1 is equivalent to Figure 5, which is - of Figure 4.
Fig. 6 is a view taken from the - line in Fig. 4; 1... Step, 3... Moving handrail, 10... Drive shaft, 11... Drive large sprocket, 12... Step chain, 13... Step sprocket, 14-1
8... Guide rail, 20... Front wheel, 21... Rear wheel, 22... Handrail sprocket, 23, 42,
43... Handrail chain, 24, 34... Handrail drive sprocket, 26, 32, 33... Handrail drive wheel, 38... Relay idler device, 39...
Stud, 40, 41... Sprocket.

Claims (1)

[Claims] 1. In the step drive mechanism and hand drive mechanism in the upper machine room of the escalator, a pair of left and right step sprockets are placed on the inside, and a pair of left and right handrail sprockets are placed on the outside and below the upper front wheel guide rail. Further, a group of sprockets in which a large drive sprocket is disposed on the outside of one of the pair of handrail sprockets are mounted on the same drive shaft 10. On the other hand, a linearly driven handrail device is provided on the guide rail portion of the inclined portion adjacent to the upper machine room, and the handrail drive sprocket of this device is located approximately on the extension line of the large drive sprocket,
A handrail drive device for an escalator, characterized in that the pair of left and right handrail drive sprockets and the pair of left and right handrail sprockets are connected by a chain via a relay idler device on each side.