JPH09110354A - Driving device of passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to work a splittable driving shaft in a short time in the field. SOLUTION: In a passenger conveyor's driving device whose driving shaft is made so as to be symmetrically splittable, each wedgelike cylinder 7A with plural pieces of notches in the longitudinal direction is fitted in two shaft 3A and 3B, and these cylinders 7A are inserted into two connecting cylinders 7B with tapers at the symmetrical ends, and in this constitution, this driving device is equipped with a connecting means 7 constituted so as to press the wedgelike cylinders 7A forcibly with a pressing body 7C to be screwed in a thread installed on the circumferential surface of the connecting cylinder 7B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for a passenger conveyor, and more particularly to a drive device for a passenger conveyor suitable for a drive shaft that can be divided into right and left.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Laid-Open No. 5-286679 discloses a technique in which a drive shaft for driving a step or a handrail drive shaft for driving a handrail can be divided so that a frame having a narrow width can be detached from the inside. As described, a technique has been proposed in which a flange is integrally formed on each of the divided drive shafts and the flanges are joined together.

[0003]

In the above-mentioned prior art, since a flange has to be formed on the drive shaft, it has to be manufactured in a factory having equipment such as a predetermined machine tool.
In order to make a drive shaft that can be delivered already into a dividable drive shaft, it is difficult to machine it in the field.Therefore, replace it with a factory manufactured one in the field.The replaced drive shaft cannot be remanufactured and must be discarded. It was uneconomical because it was costly to manufacture and transport, and replacements could not be remanufactured.

An object of the present invention is to provide a drive device for a passenger conveyor that can process a dividable drive shaft on-site in a short time.

[0005]

In order to achieve the above object, the present invention provides a drive shaft for driving a step connected endlessly through a chain and rotating a step sprocket provided in a pair of left and right. , The rotation is transmitted through a handrail sprocket and a handrail chain provided on the drive shaft, and the handrail drive shaft for driving the handrail and the drive shaft and the handrail drive shaft can be divided into left and right. In the passenger conveyor drive device, the inner surface is in surface contact with the drive shaft and the handrail drive shaft,
Wedge-shaped tubular body having a plurality of cuts in the longitudinal direction, connecting tubular bodies having taper portions at the left and right ends that make surface contact with the wedge-shaped tubular body, and the wedge-shaped body mounted on the tapered portion of the tubular body And a pressing body for pressing the cylindrical body.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

FIG. 1 is a front view of a main portion of a passenger conveyor drive shaft according to an embodiment of the present invention, FIG. 2 is a side view of a main portion of a passenger conveyor upper machine room, and FIG. 3 is a drive shaft shown in FIG. FIG. 4 is a fragmentary enlarged view of the connecting tool of FIG. 4, and FIG. 4 is a perspective view of main parts of the connecting tool.

In the figure, a step (not shown) of the passenger conveyor transmits the rotational operation of the driving machine 2 installed in the machine room 1 via the drive sprocket 4 provided on the drive shaft 3 by the power transmission chain 2A, and further, The step sprocket 5A, 5B provided on the drive shaft 3 is rotated to move a step chain (not shown).

The drive shaft 3 has bearings (not shown), which are bearings, fitted at both ends, and housings 6A, 6B for accommodating the bearings (not shown) are attached to the main frame 1A by screwing them with bolts (not shown). Drive shaft 3 is drive shaft 3
It is cut into A and 3B, and the drive shafts 3A and 3B are connected by a connecting tool 7.

The connector 7 for connecting the drive shafts 3A and 3B is
Wedge-shaped tubular body 7A, connecting tubular body 7B, pressing body 7C,
It is composed of a holder 7D.

The wedge-shaped cylindrical body 7A has an inner diameter of the same size, and the inner peripheral surface and the outer peripheral surfaces of the drive shafts 3A and 3B are in surface contact with each other, and the inner peripheral surface and the outer periphery of the concentric circle have outer diameters at both ends. Is different, the cross-sectional shape in the longitudinal direction is wedge-shaped at the thick part,
Also, a plurality of notches 7Aa in the longitudinal direction are, for example, 120
It is provided in three places at angles of degrees.

The connecting tubular body 7B has the wedge-shaped tubular body 7A inserted therein, and has taper portions which are in surface contact with the outer peripheral surface of the wedge-shaped tubular body 7A at both ends of the inner peripheral surface thereof. Screws having a predetermined pitch are provided at both ends from the end portion to a predetermined size.

The pressing body 7C is provided with a disk having a hole having a diameter slightly larger than the diameters of the drive shafts 3A and 3B in the center, and a screw for screwing with a screw provided on the outer circumference of the connecting cylinder 7B on the inner peripheral surface. The cylindrical body is joined or integrally formed with the cylindrical body, and a protrusion 7Ca is provided inside the disc in the same circular shape as the hole so as to abut the end surface of the wedge-shaped cylindrical body 7A.

The holding member 7D is a substantially S-shaped metal fitting for connecting and holding the disk surfaces of the pressing member 7C with bolts 7Da and nuts 7Db so that the pressing members 7C screwed on both ends of the connecting cylinder 7B will not loosen. Is.

Next, the work of replacing the bearings (not shown) at both ends of the drive shaft 3 by cutting the drive shaft 3 will be described.

First, after performing steps such as removing a step (not shown), loosening the tension of the power transmission chain 2A, and supporting the drive shaft 3, the drive shaft 3 is moved from the center to a position closer to the drive sprocket 4 with the metal. Drive shaft 3A, 3B with a saw
Then, the bearings (not shown) in the housings 6A and 6B are removed.

Next, new bearings (not shown) are fitted to the drive shafts 3A and 3B, respectively, and the pressing body 7C and the wedge-shaped cylindrical body 7A are inserted in this order from the cut portions of the drive shafts 3A and 3B, and further driven. The connecting cylinder 7B is inserted into one of the shafts 3A and 3B, here the drive shaft 3A. Next, drive shafts 3A, 3
Bearings (not shown) fitted to the end of B are housed in the housings 6A and 6B, and temporarily fixed to the main body frame 1A with bolts (not shown).

Next, the drive shaft 3 is provided near the center of the connecting cylinder 7B.
The connecting cylindrical body 7B is moved so that the cutting points of A and 3B are located, and the wedge-shaped cylindrical bodies 7A are inserted into the gaps between the connecting cylindrical body 7B and the drive shafts 3A and 3B, respectively. The pressing bodies 7C are screwed together to drive the drive shafts 3A, 3B.
The wedge-shaped tubular body 7A is pushed in by tightening the pressing body 7C while aligning the cores of, and the gap of the notch 7Aa provided in the wedge-shaped tubular body 7A is narrowed by this pressing, and the wedge action is increased. Cut drive shaft 3
A and 3B are wedge-shaped cylindrical bodies 7A, connecting cylindrical bodies 7B, and pressing bodies 7.
Connected by C.

The pressing body 7C screwed into both ends of the connecting cylinder 7B is held by a holding body 7D, a bolt 7Da for fastening the holding bodies 7D to each other, and two nuts 7Db. Is prevented by the rotation and vibration of the drive shafts 3A and 3B, and prevents the wedge effect of the wedge-shaped tubular body 7A and the connecting tubular body 7B from being reduced.

According to the present embodiment, when the bearing (not shown) of the drive shaft 3 is replaced, the drive shaft 3 is cut so that the work can be performed even in a narrow space such as the machine room 1 of the passenger conveyor. It is not necessary to remove the shaft 3 from the main body frame 1A and put it out of the passenger conveyor.

In the present embodiment, the case of the drive shaft 3 has been described, but the same applies to the handrail drive shaft, so the description thereof will be omitted and the same effect can be obtained.

[0022]

According to the present invention, the divided drive shaft and handrail drive shaft can be connected by the wedge action of the wedge-shaped cylindrical body and the connecting cylindrical body, and the drive shaft and the handrail drive which cannot be divided. Since it can be applied to an existing passenger conveyor using a shaft, the bearing replacement work of the drive shaft and the handrail drive shaft can be performed in a short time without requiring a large-scale device.

[Brief description of the drawings]

FIG. 1 is a front view of a main portion of a passenger conveyor drive shaft according to an embodiment of the present invention.

FIG. 2 is a side view of a main part of a passenger conveyor upper machine room.

FIG. 3 is a fragmentary enlarged view of the drive shaft connector shown in FIG.

FIG. 4 is a perspective view of main parts of the connector.

[Explanation of symbols]

 3, 3A, 3B drive shaft 7 connecting tool 7A wedge-shaped cylindrical body 7B connecting cylindrical body 7C pressing body 7D holding body

Claims (3)

[Claims] 1. A drive shaft for driving steps connected endlessly through a chain to rotate a pair of left and right step sprockets, and a handrail sprocket and a handrail provided on the drive shaft. A drive system for a handrail drive shaft in which rotation is transmitted through a chain to drive a handrail, and a drive device for a passenger conveyor in which the drive shaft and the handrail drive shaft can be divided into left and right sides. A wedge-shaped cylindrical body whose inner surface is in surface contact with the shaft and has a plurality of cuts in the longitudinal direction, a connecting cylindrical body having tapered portions at the left and right ends that are in surface-contact with the wedge-shaped cylindrical body, and a taper of this cylindrical body. And a pressing body for pressing the wedge-shaped cylindrical body mounted on the passenger compartment. 2. The drive device for a passenger conveyor according to claim 1, wherein a screw is provided on an outer periphery of the cylindrical body and is screwed to the pressing body. 3. The drive device for a passenger conveyor according to claim 1, further comprising a holding body that holds the pressing body.