JPH08245153A - Escalator - Google Patents

Abstract

PURPOSE: To make lubrication to a chain stably performable over a long period of time by connecting a pipeline to a supporting part attached to a truss via an elastic body, and feeding this handrail driving chain with lubricating oil fed to this supporting part from a nozzle by way of an upper roller. CONSTITUTION: When a pump is driven, lubricating oil in an oil tank is fed to an oiling hole 16a of a connecting rod 16 via a pipeline 6B, and it is dropped in a groove 3a formed on the circumference of a roller 3 from a nozzle 5 installed in a lower end of this connecting rod 16. Accordingly this lubricating oil is fed to a driving chain 29 rotating an endless handrail of an escalator via the groove 3a formed on the circumference of the rotating roller 3. When this handrail driving chain 29 is extended to some degree due to operations of the escalator extending over a long period of time, the extent of tension in an upper part of the handrail driving chain 29 is decreased to some extent, but a limit switch 10 is turned on into operation by dint of a tension spring 9 installed in a moving part supporting rod 7 and thereby an alarm is driven at the same time, so it is informed to a service engineer.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an escalator.

[0002]

2. Description of the Related Art FIG. 4 is a right side view showing the upper floor side of a conventional escalator. In FIG. 4, a speed reducer 26 is housed on the upper floor side of the truss (not shown). This reducer
A three-phase induction motor 25 that drives this escalator is installed above 26, and the output shaft of this three-phase induction motor 25 is
It is connected to the input shaft of the speed reducer 26 via a coupling (not shown).

A small-diameter sprocket 35 is press-fitted into the output shaft 26a of the speed reducer 26 via a key (not shown). The left end of the drive chain 27 is wound around the sprocket 35.

On the right side of the speed reducer 26, a drive shaft 28a is rotatably supported by a truss via bearings (not shown) inserted on both sides of the drive shaft 28a. A large-diameter drive wheel 28 is press-fitted into the drive shaft 28a through a key (not shown), and the right end of the drive chain 27 described above is wound around the drive wheel 28a.

A handrail drive wheel 36 having a small diameter is press-fitted to the outside of the drive wheel 28 on the drive shaft 28a through a key (not shown). This handrail drive wheel 36 has a handrail drive chain.
The left end of 29 is wound.

On the right side of the drive shaft 28a, a drive shaft 32a is rotatably supported by the truss via a pair of bearings (not shown). A medium-diameter sprocket 37 is press-fitted into the drive shaft 32a through a key (not shown).
The right end of the above-mentioned handrail drive chain 29 is wound around.

A large diameter handrail belt drive wheel 32 is press-fitted into the drive shaft 32a inside the sprocket 37 via a key (not shown). On the upper left side of the drive shaft 32a,
The tension sprocket 30 is rotatably attached via a support fitting 31 attached to the truss and a shaft (not shown) penetrating the support fitting 31. On the upper surface of the tension sprocket 30, the handrail drive chain 29
The middle part of is engaged.

On the upper left side of the tension sprocket 30,
A guide roller 34A is rotatably provided via a shaft 34a supported by a truss. Also on the right side of the drive shaft 32a, the shaft
34b is pierced by the truss, and the guide roller is attached to the shaft 34b.
34 is press-fitted through a bearing (not shown).

An upper end of the endless handrail belt 33 is wound around the upper surfaces of the guide rollers 34A and 34B and the lower surface of the handrail belt drive wheel 32 described above. The left end of the handrail belt 33 fits inside the outer surface of the balustrade roller 39 shown by the broken line continuously provided at the end of the balustrade 38 on the upper floor side.
It is fitted from the upper end of 38 to the balustrade on the lower floor side.

A pump 22 is housed in the upper part of the speed reducer 26, and an oil tank 21 for storing lubricating oil is provided on the left side of the pump 22.
Is installed. The oil tank 21 and the pump 22 are connected by a pipe 6A, and the left end of the pipe 6B is also connected to the output side of the pump 22.

The right end of the pipe 6B is arranged below the guide roller 34A. A nozzle 24 for dripping the lubricating oil onto the handrail drive chain 29 is vertically provided at the lower end of the right end of the pipe 6B.

In the thus constructed escalator, when the three-phase induction motor 25 is driven, the speed reducer 26 is driven, and the sprocket 35 is driven at a predetermined speed reduction ratio via the output shaft 26a of the speed reducer 26. Driven.

Then, through the drive chain 27 whose left end is wound around the sprocket 35, the drive wheels are driven at a predetermined reduction ratio.
28 is driven. The rotation of this drive wheel 28
Is transmitted to the handrail drive wheel 36 through the press-fitted drive shaft 28a, and the handrail drive chain 29 is driven.

As the handrail drive chain 29 is driven, the sprocket is wound around the right end of the handrail drive chain 29.
37 is driven, and the rotation of the sprocket 37 is transmitted to the handrail belt drive wheel 32 via the drive shaft 32a into which the sprocket 37 is press fitted.

When the handrail belt drive wheel 32 is driven,
The handrail belt wound around the lower side of the handrail belt drive wheel 32
33 is driven.

In the thus constructed elevator, the drive chain 27 meshes with the teeth of the sprocket 35 and the drive wheel 28, and the handrail drive chain 29 meshes with the teeth of the handrail drive wheel 36 and the sprocket 37, thereby reducing the speed reducer 26. Is transmitted to the handrail belt 33 via the handrail belt drive wheel 32.

Therefore, wear of each chain and sprocket due to friction during meshing of each chain and sprocket teeth is prevented, the life of these chains and sprockets is extended, and the frequency of maintenance and inspection of the escalator is reduced. Lubricating oil is supplied from the nozzle 24 in order to reduce noise generated during meshing.

[0018]

However, in the escalator configured as described above, each chain slightly expands due to long-term operation, and also expands due to a sharp load change. Furthermore, during long-term use, the nozzle
The relative position between 24 and the chain may be slightly displaced.

Then, since the amount of lubricating oil to be lubricated varies, friction between each chain and the teeth of the sprocket increases, and as a result, abrasion of the contact surface between the teeth of the sprocket and each chain may be accelerated. There is also.

Therefore, a first object of the present invention is to obtain an escalator capable of stably lubricating a chain for a long period of time, and a second object of the present invention is to easily detect chain elongation. Is to get an escalator that can do.

[0021]

The escalator according to the first aspect of the present invention comprises a pipe having a distal end connected to a support portion vertically installed on a truss via an elastic body, into which lubricating oil is injected, and a support portion. An upper roller and a lower roller which are rotatably provided at a lower portion, a handrail drive chain which is inserted between the upper roller and the lower roller, and a lubricating oil which is attached to a supporting portion and is injected into the inside of the pipe is an upper roller. And a nozzle for supplying to the.

Further, the escalator according to a second aspect of the invention is characterized in that a detector for detecting a vertical displacement of the support portion is provided above the support portion.

Further, the escalator of the invention described in claim 3 is characterized in that an alarm device is connected to the detector.

[0024]

According to the first aspect of the invention, the lubricating oil supplied from the tip of the pipe to the supporting portion is supplied to the handrail drive chain from the nozzle attached to the supporting portion through the upper roller.

Further, in the invention described in claim 2,
When the handrail drive chain extends, this extension is detected by a detector that detects the vertical movement of the support portion.

Further, in the third aspect of the present invention, when the handrail drive chain is extended, a maintenance worker is notified by an alarm device that operates by a signal input from the detector.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the escalator of the present invention will be described below with reference to the drawings. FIG. 1 is a partial right side view showing a first embodiment of the escalator of the present invention, and is a view corresponding to FIG. 4 shown in the prior art. FIG. 2 is a partially enlarged detailed view of FIG.

In FIGS. 1 and 2, the difference from the prior art shown in FIG. 4 is that the tension sprocket shown in FIG. 4 is located above the intermediate portion of the handrail drive chain 29.
The rest is the same as FIG. 4 in that, instead of 30, an oil supply mechanism 1 that also serves to adjust the tension of the handrail drive chain 29 is provided. Therefore, the same elements as those in FIG.

In FIGS. 1 and 2, a movable member support rod 7 is vertically provided on a support fitting 31 fixed to a truss. A tension spring 9 is previously attached to the movable portion support rod 7.

A disk-shaped flange portion 7a is formed at the upper end of the movable portion support rod 7, and a flange portion 7b is also symmetrically formed at the lower end. The tension spring 9 is compressed on the lower surface of the flange portion 7a.

The flange portion 7 at the lower end of the movable portion support rod 7
The upper end of the connecting rod 16 is fixed to the lower surface of b with a plurality of bolts. An oil supply hole 16a is formed on the right side surface of the connecting rod 16 in FIG. 2, and the oil supply hole 16a is bent downward from the center of the connecting rod 16 and reaches the lower end surface of the connecting rod 16.

Female tapers (not shown) for piping are formed on the right side and the lower end of the oil supply hole 16a. this house,
The pipe taper female thread at the right end of the oil supply hole 16a is screwed with the pipe joint 6a, and the pipe joint 6a is screwed with the right end of the pipe 6B shown in FIG.

The upper end of the oil supply nozzle 5 is connected to the taper female thread for piping at the lower end of the connecting rod 16 via a joint 6b. The upper ends of a pair of strip-shaped support plates 4 are fixed to the side surfaces of the lower portion of the connecting rod 16 with a pair of bolts. A pin 17A is provided in the central portion of the pair of support plates 4 so as to penetrate in the direction orthogonal to the paper surface of FIG. A bearing 18A is press-fitted in the center of the pin 17A, and a roller 3 is press-fitted in the outer ring of the bearing 18A.

A pin 17B is also provided at the lower end of the connecting rod 16. A bearing 18B is press-fitted in the center of the pin 17B, and the roller 2 is press-fitted in the outer ring of the bearing 18B. A handrail drive chain 29 is wound around the upper end of the roller 2. The lower end surface of the roller 3 is a handrail drive chain.
It touches the upper surface of 29.

A fixed frame 8 formed in a substantially Ω shape is placed on the upper surface of the support fitting 31, and the lower ends of the fixed frame 8 are fixed to the support fitting 31 with bolts 8a. Fixed frame 8
An adjusting screw 11 is vertically screwed to the center of the upper end of the, and a limit switch 10 is attached to the lower end surface of the adjusting screw 11. The lead wire 10a of this limit switch 10 is
It is connected to the detector 14, and an alarm device 15 is connected to the detector 14.

In the thus constructed escalator, the connecting rod 16 is connected by the pump 22 through the pipes 3A and 3B.
The lubricating oil supplied to the roller 3 is dripped into the groove 3a formed on the outer circumference of the roller 3 from the nozzle 5 vertically provided at the lower end of the connecting rod 16. Then, this lubricating oil is supplied to the groove 3a formed on the outer circumference of the roller 3 which is rotated by the movement of the handrail drive chain 29.
Is supplied to the handrail drive chain 29 from.

When the handrail drive chain 29 is extended by the operation of the escalator for a long period of time, when the handrail drive chain 29 rotates clockwise in FIG.
The tension on the upper part of the handrail drive chain 29 decreases.

As a result, the amount of bending of the tension spring 9 inserted into the movable part support rod 7 decreases, and the upper surface of the flange portion 7a on the upper part of the movable part support rod 7 contacts the limit switch 10. 10 works. Then, the alarm device 15 operates by the signal transmitted from the detector 14 to which the operation signal is input, and notifies the maintenance staff of the escalator to that effect.

Next, FIG. 3 is a partial detailed view showing a second embodiment of the escalator of the present invention and is a view corresponding to FIG. 3 is different from FIG. 2 in that a sliding resistor 19 is vertically provided on the lower surface on the upper right side of the fixed frame 8. The movable terminal 19b of the sliding resistor 19 is fixed to the flange 7a at the upper end of the movable portion support rod 7.

In the thus constructed escalator, when the tension of the handrail drive chain 29 decreases and the movable part support rod 7 moves upward, the resistance value of the sliding resistor 19 changes and the handrail drive chain 29 changes. Since it is possible to continuously detect the elongation of the, the abnormality can be known at an early point.

Therefore, in the initial stage of the change of the resistance value of the sliding resistor 19, when the elongation is increased as compared with the normal case,
The orange signal lamp may be turned on as a stage before the alarm is issued by the alarm device, and the red signal lamp may be turned on when the alarm signal is further extended.

[0042]

As described above, according to the invention of claim 1,
A pipe whose tip is connected to a support portion vertically provided on the truss via an elastic body and into which lubricating oil is injected; The handrail drive chain inserted between the rollers and the nozzle that is attached to the support portion and that supplies the lubricating oil injected into the inside of the pipe to the upper roller are supplied to the support portion from the tip of the pipe. Since the lubricating oil is supplied to the handrail drive chain from the nozzle attached to the support portion through the upper roller, it is possible to obtain an escalator capable of stably lubricating the chain for a long period of time.

According to the second aspect of the present invention, by providing a detector for detecting the vertical displacement of the support portion above the support portion, when the handrail drive chain extends, this extension occurs. Is detected by a detector that detects the vertical movement of the support part, so it is possible to stably lubricate the chain over a long period of time and obtain an escalator that can easily detect chain elongation. it can.

Further, according to the invention described in claim 3,
When the handrail drive chain is extended by connecting an alarm device to the detector, it is possible to notify maintenance personnel by an alarm that operates according to the signal input from the detector. It is possible to obtain an escalator capable of stably performing the operation for a long period of time and easily detecting the elongation of the chain.

[Brief description of drawings]

FIG. 1 is a partial side view showing a first embodiment of an escalator according to the present invention.

FIG. 2 is an enlarged detailed view showing a main part of FIG.

FIG. 3 is a partial side view showing a second embodiment of the escalator according to the present invention.

FIG. 4 is a partial side view showing an example of a conventional escalator.

[Explanation of symbols]

1 ... Oil supply mechanism, 2, 3 ... Roller, 4 ... Support plate, 5 ... Nozzle, 6A, 6B ... Piping, 7 ... Movable part support rod, 8 ... Fixed frame, 9 ... Tension spring, 10 ... Limit switch, 11 ... Adjustment screw, 14 ... Detector, 15 ... Alarm device, 16 ... Connecting rod, 17A, 17
B ... Pin, 18A, 18B ... Bearing, 19 ... Sliding resistor, 29 ... Handrail drive chain, 31 ... Support metal fitting.

Claims (3)

[Claims] 1. A pipe, the tip of which is connected to a support portion vertically installed on a truss via an elastic body, into which lubricating oil is injected, and an upper roller and a lower roller rotatably provided below the support portion. An escalator comprising: a handrail drive chain inserted between the upper roller and the lower roller; and a nozzle attached to the support part and supplying the lubricating oil injected into the inside of the pipe to the upper roller. 2. The escalator according to claim 1, wherein a detector for detecting a vertical displacement of the support portion is provided on an upper portion of the support portion. 3. The escalator according to claim 2, further comprising an alarm device connected to the detector.