JPH0986846A - Passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a passenger conveyor which is supplied with power for driving a handrail by a handrail driving sheave engaged with a step chain and transmits little pulsation to the handrail. SOLUTION: Two sets of handrail driving devices which pinch and move a handrail 9 are installed and supplied with power via sheaves 12A, 12B engaged with step chain 4. The two sets of sheaves are installed such that they reduce the displacement phase of angular velocity thereof each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passenger conveyor such as an escalator or an electric road, and more particularly to a passenger conveyor in which power of a handrail driving device is obtained from a step chain.

[0002]

2. Description of the Related Art For example, as disclosed in Japanese Patent Application Laid-Open No. 55-111381, there is a passenger conveyor configured so that the power of a handrail drive device is obtained from a handrail drive chain that meshes with a step chain.

[0003]

According to the above configuration, the handrail drive device can be installed at any position within the traveling range of the step chain, but the pulsation generated between the step chain and the handrail drive chain car is generated. There is a problem transmitted to the handrail,
No consideration was given to the stable driving of the handrail.

It is an object of the present invention to provide a passenger conveyor in which pulsation is less transmitted to the handrail even when the handrail drive force is obtained from the handrail drive chain that meshes with the step chain.

[0005]

In order to achieve the above object, the present invention provides a passenger conveyor provided with a handrail drive device for driving a handrail by using the movement of a chain stretched over the entire area of the running direction of the tread as power. A plurality of sets of the handrail drive devices are installed, and power is transmitted to the handrail drive devices of each set via handrail drive chain wheels that mesh with the chain, respectively, and They were installed at positions where the displacement phases of the respective angular velocities were mutually reduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
The escalator shown in FIG. 2 will be described.

Upper floor of the building U. F and lower floor D. A main frame 1 is installed across F, a drive chain wheel 2 is installed in the upper part of the main frame 1, and a driven chain wheel 3 is installed in the lower part. A step chain 4 is endlessly wound around the drive chain 2 and the driven chain 3, and the step chain 4 is driven by a drive machine 6 via a large chain wheel 5 coaxial with the drive chain 2. Driven. A plurality of steps 7 are connected to the step chain 4.

A balustrade 8 is erected on both sides along the outward side of the steps 7, and a handrail 9 is guided along the periphery of the balustrade 8 so as to be movable.

The handrail 9 includes two sets of a first handrail drive device 10A and a second handrail drive device 10 installed in the main frame 1.
It is driven by B in synchronization with the moving speed of the step 7.

The handrail drive devices 10A and 10B are installed in the inclined section of the main frame 1, as shown in FIG.
A bracket 11 is fixed to each of the main frames 1, and first bracket wheels 12A and 12B that mesh with a return path side 4B of the step chain 4 are pivotally supported by the bracket 11.

The first chain wheels 12A and 12B are handrail drive chain wheels, and the two have exactly the same shape, and the first chain wheels 12A and 12B have different meshing phases with respect to the step chain 4. It is installed at each position to reduce the displacement phase of each angular velocity.

A second chain wheel 13 is fixed coaxially with the first chain wheels 12A and 12B and rotates integrally.

On the other hand, brackets 14, 14 are fixed side by side at a position of the main frame 1 which is close to the return path side of the handrail 9, and two drive rollers 15, 15 are respectively mounted on the brackets 14, 14. Supported by these drive rollers 15, 15
Comes into contact with the back surface of the handrail 9 and rolls. Further, the third chain wheels 16, 16 are fixed coaxially with the drive rollers 15, 15.

The second chain wheel 13 and the third chain wheel 16,
A power transmission chain 17 is wound around 16, and the first chain wheel 12A, 1 is further provided via an idler chain wheel 18.
The rotation of 2B is transmitted to the drive rollers 15 and 15.

Follower rollers 19 and 19 are located at positions facing the drive rollers 15 and 15 with the handrail 9 interposed therebetween, and are supported by the bracket 14.

A support plate 20 is supported on the bracket 14, and a compression spring 21 for pressing the driven roller 19 toward the front surface of the handrail 9 is provided on the support plate 20. When a driving command is issued in the above configuration, the driving machine 6 is driven to rotate the large chain vehicle 5. Due to the rotation of the large chain wheel 5, the drive chain wheel 2 coaxial with the large chain wheel 5 is rotated, and the step chain 4 wound around the drive chain wheel 2 is rotated and a plurality of steps 7 are formed.
To move.

Simultaneously with the movement of the step 7, the first chain wheels 12A, 12 which mesh with the return path side 4B of the moving step chain 4
B rotates, coaxial second chain wheel 13 → chain 17 → third
Drive roller 15 via chain wheel 16 and idler chain wheel 18
Is rotating. The handrail 9 is moved by the rotation of the drive roller 15 and the friction between the driven roller 19 and the driven roller 19.

Here, in addition to the diameter of the first chain wheels 12A and 12B, the dimension C between the shafts of the first chain wheels 12A and 12B is more than a positive multiple of the pitch P of the chain rollers 4R of the step chain 4 ( The displacement phases of the respective angular velocities are mutually reduced by increasing P / the number of the first chain wheel 2). That is, by setting in this way, the first
When the chain wheel 12A meshes with the chain roller 4R,
The meshing of the chain wheel 12B with the chain roller 4R is P
/ 2, which causes the first chain wheel 12 to move relative to the movement of the step chain 4 as shown in FIG.
The displacement phase a of the angular velocity of A and the displacement phase b of the angular velocity of the first chain wheel 12B are opposite to each other. As a result, both first
The chain wheels 12A and 12B cancel each other's phases to eliminate the pulsation transmitted from the step chain 4, thereby smoothing or equalizing the driving force.

Therefore, in the conventional case, when one first chain wheel is engaged with the step chain 4 to transmit power, in order to reduce pulsation, a chain wheel having a large diameter must be used. However, the pulsation can be reduced by using a plurality of small first chain wheels, and by using the small first chain wheels, an increase in the height dimension H of the main frame 1 can be suppressed. be able to.

Next, when power is transmitted using a plurality of small first chain wheels having the same shape, the number of the first chain wheels is N, the diameter of the first chain wheel is D, the natural number is n, and the step chain 4 is used. When the pitch of the chain roller 4R is P, the inter-shaft dimension C between the first chain wheels is C = nP + P / N (where C> D). If a plurality of first chain wheels are installed with such an inter-axis dimension C, it is possible to prevent pulsation from being transmitted to the handrail 9.

The case where power is transmitted by using three first chain wheels a, b, c having the same shape with a diameter D will be described.
The axial dimension C between the three first chain wheels a, b, c is C = nP + P / 3 (where C> D), and the meshing phase with the chain roller is P / 3, respectively.
It will shift one by one. As a result, the first chain cars a, b, c
The relationship between the displacement phases of the angular velocities is as shown in FIG. 4, and the phases of the first chain wheels a, b, and c cancel each other out.

In the above embodiment, the first chain wheels 12A and 12B are meshed with the return path side 4B of the step chain 4 to transmit power to the handrail drive devices 10A and 10B, respectively. The first chain wheel 12A on the side 4A,
The power may be transmitted to the handrail drive devices 10A and 10B by engaging the 12B with each other. However, in that case,
The handrail drive devices 10A and 10B and the first chain wheel 12 shown in FIG.
If the relationship with A and 12B is used as it is, the moving direction of the step 7 on the outward side and the moving direction of the handrail 9 are opposite and cannot be used. It is necessary to add a reversing means such as an intermediate chain wheel between 4A and the first chain wheels 12A and 12B.

Further, although the above-mentioned embodiment shows an example in which the present invention is applied to an escalator, it can also be applied to a handrail drive device of an electric road installed horizontally or inclined, and a power transmission portion. The configuration of is the same as that of the above embodiment.

[0024]

According to the present invention, even if the handrail drive force is obtained from the handrail drive chain that meshes with the step chain,
It is possible to obtain a passenger conveyor with less pulsation transmission to the handrail.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a handrail drive device according to the present invention.

FIG. 2 is a side view showing an escalator to which the handrail drive device shown in FIG. 1 is applied.

FIG. 3 is a diagram showing a displacement phase of angular velocities of two chain wheels meshing with a step chain.

FIG. 4 is a diagram showing displacement phases of angular velocities of three chain wheels meshing with a step chain.

[Explanation of symbols]

4 ... Step chain, 4R ... Chain roller, 9 ... Handrail,
10A, 10B ... Handrail drive device, 12A, 12B ... 1st
Chain wheel, 15 ... drive roller, 19 ... driven roller, C ... first
Inter-axle dimension of chain wheel, P ... Chain roller 4R pitch.

Claims (6)

[Claims] 1. In a passenger conveyor equipped with a handrail drive device for driving a handrail by using the movement of a chain stretched over the entire area of the running direction of the tread as a power source, a plurality of sets of the handrail drive devices are installed and each of these sets Power is transmitted to the handrail drive device via handrail drive chain wheels that mesh with the chains, and the handrail drive chain wheels are installed at positions where the displacement phases of the respective angular velocities are mutually reduced. Passenger conveyor characterized by that. 2. A passenger conveyer equipped with a handrail drive device for driving a handrail using the movement of a chain stretched over the entire area of the step running direction as a power source, wherein a plurality of handrail drive devices are installed and a plurality of handrail sets are provided. Power is transmitted to the drive device via handrail drive chain wheels that mesh with the chain, and the number of handrail drive chain wheels is N, the diameter of the handrail drive chain wheels is D, and the chain is Where P is the pitch of the chain rollers, C is the axial center distance of the adjacent handrail drive sheave, and n is an arbitrary natural number, C = nP + P / N (where C> D). Passenger conveyor characterized by. 3. The passenger conveyor according to claim 1, wherein the handrail drive chain wheels are arranged side by side so as to mesh with each other in a straight running section of the chain. 4. The passenger conveyor according to claim 1, wherein the handrail drive chain wheels are arranged side by side so as to mesh with each other at an intermediate portion of a straight running section of the chain. 5. The passenger conveyor according to claim 1, wherein the handrail drive chain wheels are arranged side by side so as to mesh with each other in a straight travel section on the return path side of the chain. 6. A passenger conveyor equipped with a handrail drive device for squeezing a handrail by using the movement of a step chain stretched in the running direction of the treads as a power source. The same number of handrail drive chain wheels that mesh with the homeward side of the handrail drive device are provided.
Passengers characterized in that chains for transmitting power from these handrail drive chain cars to the respective handrail drive devices are mounted, and the meshing phases of the handrail drive chain cars with the step chains are different from each other. Conveyor.