JPH10297855A - Passenger conveyor handrail drive - Google Patents

Abstract

(57) Abstract: A handrail drive device that obtains a driving force by engaging a driven gear with a chain roller of a step chain is provided.
An object of the present invention is to provide a handrail drive device with less handrail pulsation. A passenger conveyor provided with a handrail driving device that drives a handrail by using movement of a step chain as a power, configured to transmit power via a driven gear meshing with a chain roller of the chain, comprising: a driven gear; A flywheel is provided coaxially to induce a moment of inertia.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handrail driving device for a passenger conveyor.

[0002]

2. Description of the Related Art For example, as described in Japanese Patent Application Laid-Open No. 55-111381, there is a passenger conveyor configured to obtain power of a handrail driving device from a driven gear meshing with a step chain.

[0003]

According to the above construction, there is an advantage that the handrail can be driven without complicating the structure, and the handrail driving device can be installed at any position within the traveling range of the step chain. However, there is a problem that rack teeth must be provided on the step chain, a special step chain is required, and the cost increases.

[0004] Further, in a system in which a driven gear is transmitted by engaging a driven gear with a chain roller of a step chain without providing a rack tooth on the step chain, a driven gear having a small diameter must be engaged with a linear step chain. Therefore, there is a problem that the meshing ratio is deteriorated, and a collision sound in which the step chain collides with the driven gear and a variation in the angular velocity of the driven gear occur, and the variation in the angular velocity is transmitted to the handrail, thereby causing pulsation of the handrail.

It is an object of the present invention to provide a handrail drive device that obtains a driving force by engaging a driven gear with a chain roller of a step chain, and to provide a handrail drive device with less handrail pulsation.

[0006]

In order to achieve the above object, the present invention relates to a passenger conveyor provided with a handrail driving device for driving a handrail by using the movement of a step chain as a power source. Power is transmitted through the driven gear that meshes with the driven gear, and a flywheel that induces a moment of inertia coaxially with the driven gear is provided to smooth variations in angular velocity and reduce handrail pulsation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In FIG. 4, an upper floor UF and a lower floor DF of a building are shown.
A main frame 1 is provided therebetween, and a drive gear 2 is provided in an upper portion of the main frame 1, and a driven gear 3 is provided in a lower portion. A step chain 4 is wound around the driving gear 2 and the driven gear 3 endlessly, and the step chain 4 is driven by the power of a driving machine 6 via a large gear 5 coaxial with the driving gear 2. A plurality of steps 7 are connected to the step chain 4.

A balustrade 8 is erected on both sides of the steps 7 along the outward path, and a handrail 9 is provided on the periphery of the balustrade 8.
Are guided so that they can move.

The handrail 9 is driven by a handrail driving device 10 installed in the main frame 1 in synchronization with the moving speed of the steps 7.

As shown in FIG. 3, the handrail driving device 10 is installed in an inclined section of the main frame 1. A bracket 11 is fixed to the main frame 1, and a driven gear 12 that meshes with the return path 4 </ b> B of the step chain 4 is supported by the bracket 11.

The driven gear 12 is for obtaining the driving force of the handrail from the step chain. The second gear 13 is fixed coaxially and rotates integrally.

On the other hand, a bracket 14 is fixed to the main frame 1 at a position close to the return path side of the handrail 9, and two drive rollers 15 are supported by a support plate 20 integrated with the bracket 14. The drive rollers 15 abut on the back surface of the handrail 9 and roll. Further, a third gear 16 is fixed coaxially with the driving rollers 15.

A power transmission chain 17 is wound around the second gear 13 and the third gear 16, and further transmits the rotation of the driven gear 12 to the drive roller 15 via an idler gear 18.

A driven roller 19 is located at a position opposing the driving roller 15 with the handrail 9 interposed therebetween, and a supporting plate 20 is provided.
It is supported by.

The support plate 20 is provided with a compression spring 21 for pressing the driven roller 19 against the surface of the handrail 9.

When there is an operation command in the above configuration, the driving machine 6 is driven to rotate the large gear 5. The rotation of the large gear 5 causes the drive gear 2 coaxial with the large gear 5 to rotate, and the step chain 4 wound around this rotates to move the plurality of steps 7.

Simultaneously with the movement of the step 7, the driven gear 12 meshing with the return path 4B of the moving step chain 4 rotates, and the coaxial second gear 13 → chain 17 → third gear 16
Further, the drive roller 15 is rotated via the idler gear 18. The rotation of the driving roller 15 and the driven roller 1
The handrail 9 is moved by friction caused by the clamping force with the handrail 9.

Next, a sectional view of the driven gear 12 is shown in FIG.

In FIG. 1, the driven gear 12 and the coaxial second gear 13 are fixed to a support 22, and a flywheel 23 for inducing a moment of inertia is fixed to the support 22, and is synchronized about an axis 24. Rotate. The variation in the angular velocity of the driven gear 12 can be smoothed by the moment of inertia of the flywheel 23.

FIG. 2 shows the variation of the angular velocity of the driven gear 12. A shows the variation of the angular velocity of the driven gear 12 when the flywheel is not attached, and B shows the variation of the angular velocity of the driven gear 12 when the flywheel is attached. In other words, when the rotational moment of the driven gear 12 is larger than the average rotational moment, the flywheel 23 absorbs the surplus energy to prevent an increase in angular velocity. When the rotational moment is smaller than the average rotational moment, the flywheel 23 stores the energy before. That is, the angular velocity of the driven gear 12 is smoothed by preventing the fall of the angular velocity by releasing the energy.

[0022]

According to the present invention, there is provided a handrail driving device that obtains a driving force by engaging a driven gear with a chain roller of a step chain, and can provide a handrail driving device with less handrail pulsation.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a change in angular velocity of a handrail driving device according to the present invention.

FIG. 3 is a plan view showing one embodiment of a handrail driving device according to the embodiment of the present invention.

4 is a side view showing an escalator to which the handrail driving device shown in FIG. 3 is applied.

[Explanation of symbols]

Reference numeral 4: step chain, 4R: chain roller, 9: handrail, 10: handrail drive, 12: driven gear, 15: drive roller, 19: driven roller, 22: guide rail, 23: flywheel.

Claims (3)

[Claims] 1. A step chain that is connected endlessly and turns, a front shaft that is incorporated into the step chain at a fixed interval and a front wheel that is provided at a side end thereof, and that is incorporated into the front wheel together with the step chain. In a passenger conveyor having a step having a rotating rear wheel, a handrail moving at the same speed as the step, and a balustrade supporting the step, the driving force of the handrail is obtained from the rotating step chain. Handrail drive for passenger conveyor. 2. A driven gear for driving a handrail by individually meshing with a chain roller of the step chain,
2. The handrail drive device according to claim 1, wherein the handrail drive device is disposed on a straight running portion of the step chain. 3. The handrail drive device according to claim 1, further comprising a flywheel that induces a moment of inertia coaxially with said driven gear.