JP2812594B2 - Chain tension adjustment device for passenger conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passenger conveyor chain tension adjusting device provided on a passenger conveyor such as an escalator for adjusting a tension of a drive chain for driving a moving handrail.

[0002]

2. Description of the Related Art Generally, a passenger conveyor such as an escalator or the like has a plurality of driving wheels engaged with one surface of a moving handrail, a driving chain wound around these driving wheels and transmitting a driving force, and Each driving wheel has a plurality of driven wheels facing each other with a handrail interposed therebetween. In this passenger conveyor, the moving handrail is driven while being pinched by a plurality of sets of driving wheels and driven wheels, and at that time, the driving wheels are prevented from slipping on the moving handrail,
Thus, the driving force can be reliably transmitted to the handrail.

A chain tension adjusting device provided on such a passenger conveyor includes an idler sprocket engaged with a drive chain, a mounting plate on which the idler sprocket is rotatably mounted, and a support for movably supporting the mounting plate. And a plate. In this chain tension adjusting device, since the driving wheel and the driven wheel pinch the moving handrail as described above, the rotation operation of the driving wheel is restricted, and the rotation of the driving chain is accordingly caused. Operation is also regulated. For this reason, when adjusting the tension of the drive chain, it is necessary to collect slack of the drive chain in the vicinity of the idler sprocket against the clamping force.

Therefore, conventionally, for example, Japanese Utility Model Publication No.
As described in Japanese Patent Application Laid-Open Publication No. H10-260, there has been proposed an apparatus having a connecting rod that has a fitting projection and rotates a driving wheel.
In this conventional device, when adjusting the tension of the drive chain, the slack of the drive chain is gathered near the idler sprocket by rotating the drive wheel with the connecting rod, and while maintaining this state, the idler sprocket is pushed down to mount the mounting plate. Is fixed to the support plate.

[0005]

In the above-mentioned prior art, the operation of holding the driving wheel rotated by the connecting rod and the operation of pushing down the idler sprocket are required at the same time. There has been a problem that the tension adjustment becomes complicated, and it is difficult to adjust the tension of the drive chain to a predetermined value.

SUMMARY OF THE INVENTION The present invention has been made in view of such a situation in the prior art, and has as its object to adjust the tension of a drive chain so that the drive chain does not need to be rotated without rotating the idler sprocket. The present invention is to provide a passenger conveyor chain tension adjusting device that can be collected near a vehicle.

[0007]

SUMMARY OF THE INVENTION To achieve this object, the present invention provides an idler sprocket for engaging a drive chain for driving a moving handrail, a mounting plate on which the idler sprocket is rotatably mounted, and A support plate that movably supports the mounting plate, and a tension control device for the passenger conveyor that adjusts the tension of the drive chain by moving the mounting plate relative to the support plate; A shaft member rotatably held by the support plate, and a pressing member fixed to the shaft member and pressing one end of the mounting plate in a moving direction of the idler sprocket according to rotation of the shaft member. Configuration.

[0008]

Since the present invention is constructed as described above, when adjusting the tension of the drive chain, one end of the shaft member is held by the support plate, and the pressing member fixed to the shaft member is connected to one end of the mounting plate. When the shaft member is rotated in this state by engaging, the pressing member presses one end of the mounting plate in the moving direction of the idler sprocket according to the rotation of the shaft member. It moves relatively to the support plate.
This allows slack in the drive chain to be collected near the idler sprocket without requiring rotation of the drive wheels.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a passenger conveyor chain tension adjusting device according to the present invention will be described below with reference to the drawings. 1 is an explanatory view showing an embodiment of a chain tension adjusting device for a passenger conveyor according to the present invention, FIG. 2 is a perspective view showing a jig provided in the chain tension adjusting device of FIG. 1, and FIG. 3 is a chain tension of FIG. It is a perspective view which shows the principal part of the passenger conveyor in which an adjustment apparatus is provided.

In general, a passenger conveyor, for example, an escalator, as shown in FIG.
A support plate 3 movably provided on the support frame 2 via a guide pin 3A; a plurality of drive wheels 4 rotatably supported by the support plate 3 and each having a sprocket 4A; 4, a plurality of driven wheels 5 rotatably supported by the support frame 2, an idler sprocket 6 disposed below the drive wheel 4, and the idler sprocket 6 is rotatably mounted. Mounting plate 6
A and bolts 7 for fastening the mounting plate 6A to the support plate 3.
An intermediate sprocket 8 rotatably supported by the mounting plate 6A, a sprocket 4A, an idler sprocket 6,
And an endless drive chain 9 wound around the large diameter portion 8B of the intermediate sprocket 8, a counter shaft 10 rotatably supported by the frame 1, a relay sprocket 11 attached to the counter shaft 10, and this relay sprocket. Tension chain 1 wound around the small diameter portion 11A of the intermediate sprocket 8 and the small diameter portion 8A of the intermediate sprocket 8.
2 and a main chain 13 wound around a sprocket and a relay sprocket 14 of an electric motor (not shown). In this escalator, the moving handrail 15 is driven via the main chain 13, the tension chain 12, and the drive chain 9, and the moving handrail 15 is nipped by a plurality of sets of the driving wheels 4 and the driven wheels 5, thereby providing the driving wheels. 4 is prevented from slipping on the moving handrail 15.

The chain tension adjusting device of this embodiment is provided on the support plate 3 as shown in FIG.
A set of holes 16 arranged directly above A, and a maintenance jig 17 provided on the support plate 3 as shown in FIG.
A tool for driving the jig 17 such as a spanner 18 and a ratchet handle 19 is provided. Jig 17 described above
As shown in FIG. 2, the shaft member 17A includes a shaft member 17A and a pressing member 17C fixed to the shaft member 17A. The shaft member 17A is fitted into the hole 16 of the support plate 3, and the one end 1 rotatably held by the support plate 3.
7B and the other end 17D driven to rotate by a spanner 18 or a ratchet handle 19. Pressing member 17
C is formed, for example, in a disk shape and is provided eccentrically with respect to the axis of the shaft member 17A, and presses the upper end of the mounting plate 6A downward according to the rotation of the shaft member 17A. I have.

In this embodiment, the shaft member 17
A is inserted into the hole 16 of the mounting plate 6A, and the bolt 7 is loosened while the outer peripheral surface of the pressing member 17C is in contact with the upper end of the mounting plate 6A.
The shaft member 17A is rotated by the spanner 18 and the ratchet handle 19 mounted on D. In response to the rotation of the shaft member 17, the pressing member 17C presses the upper end of the mounting plate 6A downward, so that the mounting plate 6A and the idler sprocket 6 move downward, and tension is applied to the drive chain 9. Then, the tension of the drive chain 9 is checked, and when the tension of the drive chain 9 falls within a predetermined adjustment range, the bolt 7 is tightened again, thereby completing the tension adjustment of the drive chain 9.

In the embodiment constructed as described above, when adjusting the tension of the drive chain 9, the idler sprocket 6
By pressing the upper end of the mounting plate 6A on which the shaft is mounted downward, the idler sprocket 6 can be moved and the slack of the drive chain 9 can be collected near the idler sprocket 6 at the same time. Need not be required. In this embodiment, one end 17 of the shaft member 17A is inserted into the hole 16 of the support plate 3.
B is inserted into the shaft member 17.
A is securely held by the support plate 3 and the other end 17D
18 and ratchet handle 1 attached to each
9, the shaft member 17A can be rotated in a stable state, and the operation of rotating the shaft member 17A is simple.

In this embodiment, the support plate 3 has the hole 1
6 and one end 17B fitted into the hole 16 is attached to the jig 1
7 is provided on the shaft member 17A, but the present invention is not limited to this, and a hole may be provided at one end of the jig 17 and a projection fitted into this hole may be provided on the support plate 3.

[0015]

As described above, according to the present invention, by pressing the mounting plate on which the idler sprocket is mounted, the idler sprocket can be moved and the slack of the drive chain can be collected near the idler sprocket. That is, the operation of rotating the drive wheels is not required, and therefore, the tension of the drive chain can be easily and accurately adjusted.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one embodiment of a chain tension adjusting device for a passenger conveyor of the present invention.

FIG. 2 is a perspective view showing a jig provided in the chain tension adjusting device of FIG.

FIG. 3 is a perspective view showing a main part of a passenger conveyor provided with the chain tension adjusting device of FIG. 1;

[Explanation of symbols]

 Reference Signs List 3 support plate 6 idler sprocket 6A mounting plate 7 bolt 9 drive chain 15 moving handrail 16 hole 17A shaft member 17B one end 17C pressing member

Claims (1)

(57) [Claims] 1. An idler sprocket that engages with a drive chain that drives a moving handrail, a mounting plate on which the idler sprocket is rotatably mounted, and a support plate that movably supports the mounting plate. In a chain tension adjusting device for a passenger conveyor for adjusting the tension of the drive chain by moving the idler sprocket relative to the support plate, a shaft member having one end rotatably held by the support plate; And a pressing member fixed to the shaft member and pressing one end of the mounting plate in a moving direction of the idler sprocket according to rotation of the shaft member.