JPH10226480A - Handrail driving device for passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the pulsation of a handrail, especially a collision sound to a follower gear without increasing costs by transmitting power via the follower gear engaged with the chain roller of a chain and forming the teeth of the follower gear to be high and shapes such that a plurality are smoothly engaged with a step chain. SOLUTION: A step chain 4 is endlessly wound on a driving gear and a follower gear, the follower gear 12 is for obtaining a driving force for a handrail from the step chain, a second gear 13 is fixed in a coaxial manner and these are integrally rotated. A third gear 16 is fixed coaxial to a driving roller 15, a chain 17 for power transmission is wound on the second and third gears 13 and 16, and further the rotation of the follower gear 12 is transmitted to the driving roller 15 via an idler gear 18. When the pin roller 4R of the step chain 4 advances in an X direction, the follower gear 12 engaged with the pin roller 4R is rotated in a Y direction and two high teeth are engaged with the pin roller 4R.

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 such as an escalator and a moving road. The handrail drives a handrail by obtaining power from a step chain of the passenger conveyor by a small-diameter driven gear. It relates to a driving device.

[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 this configuration, the handrail can be driven without complicating the structure, and the handrail driving device can be installed at an arbitrary 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.

SUMMARY OF THE INVENTION An object of the present invention is to provide a handrail drive device that obtains a driving force by meshing a driven gear with a chain roller of a step chain, and reduces pulsation of a handrail and, particularly, collision noise to a driven gear without increasing costs. An object of the present invention is to provide a handrail driving device.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a passenger conveyor provided with a handrail drive device for driving a handrail by using the movement of a step chain as a power, and meshes with a chain roller of the chain. The power is transmitted via the driven gear, and the tooth of the driven gear is made high so that a plurality of teeth are smoothly meshed with the step chain.

[0007]

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

In FIG. 3, the upper floor U.S. F and lower floor D.
A main frame 1 is installed between F, a driving gear 2 is installed in an upper portion of the main frame 1, and a driven gear 3 is installed in a lower portion. A step chain 4 is wound around the drive gear 2 and the driven gear 3 endlessly. The step chain 4 is driven by the power of a driving machine 6 via a large gear 5 coaxial with the drive gear 2. A plurality of steps 7 are connected to the step chain 4.

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

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. 4, 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 pivotally supported on a support plate 20 integrated with the bracket 14. The driving roller 15 rolls by contacting the back surface of the handrail 9. Further, a third gear 16 is fixed coaxially with the drive roller 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 an operation command is issued in this configuration, the driving machine 6 is driven to rotate the large gear 5. The rotation of the large gear 5 causes the driving 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 backward path 4B of the moving step chain 4 rotates,
The drive roller 15 is rotated via the coaxial second gear 13 → chain 17 → third gear 16 and idler gear 18. The handrail 9 is moved by the rotation of the driving roller 15 and the friction caused by the clamping force with the driven roller 19.

FIG. 1 shows how the driven gear 12 meshes with the chain roller 4R of the step chain.

Assuming that the pin roller 4R of the step chain 4 advances in the direction X, the driven gear 12 meshing with the pin roller 4R rotates in the direction Y, and the pin roller 4R has 12A, 12A.
The two high teeth of B mesh with each other. In the state of FIG. 1, the tooth than the angular velocity of the rotation power transmitted from the chain rollers 4R ₂ to teeth 12B from the chain rollers 4R ₁ 12
Because the angular velocity due to the rotational power to A is greater, the teeth 12A
Rotational power from the chain rollers 4R ₁ is conveyed by, the teeth 12B is to rotate at an angular velocity of the chain roller 4R ₂ and meshing with the teeth 12A. Then, further the step chain 4 travels in the direction of X, towards the angular velocity of the teeth 12B from the angular velocity of the teeth 12A is increased, this time the rotational power is transmitted from the chain rollers 4R _2, the same teeth 12C simultaneously chain rollers 12C Begins to engage with.

As described above, the driven gear 1 is driven by the pin roller 4R.
By making the second teeth high and engaging two or more teeth smoothly, the fluctuation of the angular velocity of the driven gear 12 is reduced and the pulsation of the handrail 9 is reduced as compared with the case where one tooth meshes. In addition, it is possible to suppress the collision noise generated when the chain roller 4R collides with the teeth of the driven gear 12, which is generated when meshing with one tooth. Further, since the load when the handrail 9 moves can be distributed to the two teeth 12A and 12B, it is advantageous in terms of the life of the teeth.

In FIG. 3, the chain rollers 4R ₁ , 4R ₂
In this case, the guide rail 22 is provided below the chain roller 4R, as shown in FIG. 4, so that the chain roller 4R is connected to the teeth 12A and 12B.
What is necessary is just to lead to the tooth 12B.

[0023]

According to the present invention, there is provided a handrail driving apparatus which obtains a driving force by meshing a driven gear with a chain roller of a step chain, and a handrail driving with less pulsation of the handrail and particularly a collision noise with the driven gear. An apparatus can be provided.

[Brief description of the drawings]

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

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

FIG. 3 is a side view showing engagement between a driven gear of the handrail driving device and a chain roller of the step chain according to the embodiment of the present invention.

FIG. 4 is a diagram in which a guide rail is provided below a chain roller of the step chain in the meshing diagram shown in FIG. 3;

[Explanation of symbols]

4 Step chain, 4R chain roller, 9 handrail, 10 handrail drive, 12 driven gear, 15 drive roller, 19 driven roller, 22 guide rail.

Claims (4)

[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 including 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 step chain rotating. The handrail drive of the 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, wherein a plurality of teeth of said driven gear mesh with a chain roller of said step chain. 4. The handrail driving device according to claim 1, wherein a guide rail for guiding the step chain is attached to a lower side of the step chain of the engagement portion according to claim 3.