JPH10281234A - Footstep chain shock absorber of passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noise generated by engagement and to improve reliability by providing a shock absorbers on an outer periphery of a footstep chain roller, constituting the shock absorbers on a protruded part with an optional interval and arranging it so that height of the protruded part differs. SOLUTION: Shock absorbers 11a, 11b are provided on an outer periphery of a footstep chain roller 5. A plural number of the protruded parts 11a having step differences h2 are provided in the inside of width W of the footstep chain roller 5, and a plural number of the protruded parts 11b protruded by h1 from surface of the shock absorbers are provided against them. The height h1, h2 is to be dimensions in consideration of deformation quantity at the time when the extreme outside protruded part 11a collides against a tooth bottom surface 4a of a footstep sprocket 4. Width W1 of the protruded parts 11a is made to be roughly the same as width W2 of the protruded parts 11b or larger. Additionally, spring rigidity of the protruded parts 11a and the protruded parts 11b can be different from each other. Consequently, even when an engagement position of the footstep chain roller 5 and the footstep sprocket 4 is changed, it is possible to extensively reduce noise due to an engagement shock.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a step chain shock absorber for a passenger conveyor.

[0002]

2. Description of the Related Art In a conventional passenger conveyor, a step chain is provided endlessly via a step rail between a driving wheel provided on an upper side and a driven wheel provided on a lower side. This step chain has a step shaft extending between two right and left step chains to support the step at a constant interval, and the end of the step shaft fits and penetrates the side surface of the step chain, and A rotatable step wheel is provided on both shaft ends protruding outward.

[0003] The step chain is composed of a plurality of links between the steps, and a roller type chain in which a roller is provided at each link connecting portion. Each roller is configured to mesh with the tooth bottom of a step sprocket.

[0004] In order to reduce the noise generated at the time of meshing, the quietness is impaired. Therefore, a perforated portion is provided in the tooth bottom of the stepped sprocket, one end of the cushion is fitted into the perforated portion, and the other end is slightly protruded from the tooth bottom to form a chain roller. The sprocket meshing collision is mitigated to reduce noise.

[0005] As another shock absorber, Japanese Patent Publication No.
As described in JP-A-14153, a spring constant of a shock absorber provided at the tooth bottom of a step sprocket to which a roller of a roller type step chain link with a step shaft is engaged and a roller type step chain link without other step shaft attached. It is known in the art that the spring constant of a shock absorber provided at the tooth bottom of a stepped sprocket with which the above-mentioned roller meshes is different.

[0006]

In the passenger conveyor cushion of the above-mentioned technology, the pitch error and the manufacturing error of the step chain,
Since the meshing position of the step chain roller and the step sprocket changes due to aging or the like, the effect of the buffer is not sufficient, and there is a problem in the life of the buffer.

SUMMARY OF THE INVENTION An object of the present invention is to provide a highly reliable passenger conveyor shock absorber that reduces noise generated by meshing.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a step chain roller in which links are fitted through a roller type step chain formed by connecting a plurality of links at a predetermined pitch. And a chain step device of an escalator provided with a step sprocket provided on a meshing main body, wherein a buffer is provided on the outer periphery of the step chain roller, and the buffer is formed in a convex portion at an arbitrary interval, and the height of the convex portion is increased. Are arranged so that they are different.

According to the present invention, the meshing impact between the step chain roller and the step sprocket is reduced, and noise can be reduced.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing the relation between a step device and a step sprocket of a conventional passenger conveyor. FIG. 2 shows an enlarged detailed view of the engagement between the step sprocket and the step chain roller. FIG. 3 shows a locus of the stepped sprocket and the stepped chain roller at the time of meshing. FIG. 4 shows a change in the roller seating position when a pitch error is given to the step chain roller. 5 and 6 show one embodiment of the present invention.

Here, a general stepping device for a passenger conveyor includes a stepping sprocket 4 and a stepping chain 1, to which steppings 2 arranged endlessly at equal intervals are fixed, and the stepping step 2 has four steppings. The vehicle travels on the step rail 6 and the step rail 3 while being supported by the wheel 8. Further, a link is inserted through the bush 9 at a predetermined pitch P so as to penetrate the step chain 1, and a step chain roller 5 is provided on the outer peripheral surface of the bush 9.
The mesh between the step sprocket 4 and the step chain 1 is a polygonal mesh. When the step chain roller 5 bites into the teeth of the step sprocket 4, in order to reduce biting noise, a cushion 7 is provided at the tooth bottom of the step sprocket. Is embedded.

In FIG. 4, the minimum allowable pitch error and the maximum allowable pitch error are shown in the figure. The error center is shifted by g from the center line 10 of the tooth space in which the buffer 7 is embedded. In most cases, the roller 5 collides with the edge of the buffer 7. For this reason, the roller 5 cannot compress the buffer body 7 in the axial direction, applies an excessive load to the buffer body 7 itself, cannot exert the spring rigidity and damping of the buffer body 7, and comes into contact with one another. As a result, it is clear that the life of the buffer 7 is also shortened.

On the other hand, a shock absorber 11 is provided on the outer periphery of the step chain roller, and the protrusions are formed on the outer surface of the shock absorber 11 at arbitrary intervals, and are arranged so that the heights of the protrusions are different. Here, a step h is set inside the step chain roller width W.
A plurality of protrusions 11a having the number 2 are provided, and a plurality of protrusions 11b protruding from the surface of the buffer by h1 are provided. The height h2 of the outermost protruding portion 11a and the protruding portion 11b protruding from the surface of the buffer by h1 is equal to the outermost protruding portion 11a.
When a collides with the step sprocket tooth bottom surface 4a,
The dimensions are based on the amount of deformation. The width W of the protrusion 11a
1 is substantially the same as or wider than the width W2 of the convex portion 11b having the step with the height h2. Also, the convex portion 11a and the convex portion 1
The spring stiffness of 1b may be different.

Here, when the step chain roller 5 meshes with the step sprocket 4, the outermost convex portion 11a of the buffer 11 on the outer periphery of the step chain roller collides with the tooth bottom surface 4a of the step sprocket. At this time, since the entire area of the step chain roller width W is formed of a convex portion, a sufficient cushioning effect between the step chain and the step sprocket can be obtained even if a collision occurs outside the tooth groove center 10 on the bottom surface of the step sprocket tooth. For example,
Even if the outermost convex portion 11a has insufficient buffering effect and is deformed, the outermost convex portion is buffered and absorbed by the convex portion 11b lower by h2 from the outermost convex portion, and the mesh noise of the step chain roller and the step sprocket is reduced.

[0016]

According to the present invention, by providing a cushion having convex portions at arbitrary intervals on the outer periphery of the step chain roller, the step chain roller and the step can be prevented due to chain pitch error, manufacturing error, aging and the like. Even if the meshing position of the sprocket tooth bottom changes, the noise generated by the meshing impact can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a conventional step device and a step sprocket of a passenger conveyor.

FIG. 2 is an explanatory diagram of a conventional step sprocket meshing with a step chain roller.

FIG. 3 is an explanatory diagram of a locus when a step sprocket and a step chain roller mesh with each other.

FIG. 4 is an explanatory diagram of a change in roller seating position when a pitch error is given to a step chain roller.

FIG. 5 is a sectional view showing an embodiment of the present invention.

FIG. 6 is a sectional view showing one embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Step chain, 2 ... Step, 3 ... Step rail, 4 ... Step sprocket, 5 ... Step chain roller, 6 ... Step rail, 7, 11 ... Buffer, 8 ... Step wheel, 9 ... Step chain bush, 10 ... The center of the tooth space.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuhei Kojima 1070 Ma, Hitachinaka-shi, Ibaraki Pref. Hitachi, Ltd. Mito Plant

Claims (3)

[Claims] 1. A stepping device for a passenger conveyor comprising a stepped sprocket which meshes with a stepped chain roller which is fitted with a roller-type stepped chain formed by connecting a plurality of links at a predetermined pitch and penetrating the links. A step chain shock absorber for a passenger conveyor, wherein a shock absorber is provided on an outer periphery of the step chain roller. 2. The step chain shock absorbing device for a passenger conveyor according to claim 1, wherein projections are provided at arbitrary intervals on the surface of the shock absorber provided on the outer periphery of the step chain roller. 3. The step chain shock absorbing device for a passenger conveyor according to claim 1, wherein the height of the projecting portions of the buffer provided on the outer periphery of the step chain roller is different.