JPH0861435A - Variable speed chain - Google Patents

Abstract

PURPOSE: To easily make the moving speed of a driven matter high and low by connecting rotators provided with a pin hole in which a connecting pin is inserted and a slit to each other inform of a chain, and providing an operation rail which comes into contact with the rotators. CONSTITUTION: A rotator 1 having a pin hole 2 and a slit 3 is formed, and the rotator is formed in such a manner that an angle between a line connecting the pin hole 2 and an arbitrary point on the slit 3 is always 90 deg. or more. The outside surface 5 of the rotator 1 is formed in such a manner that when the space between the pin hole 2 and the slit 3 is maximum, the space between a line connecting between the tip (a) of the slit 3 and the pin hole 2 and a parallel line circumscribed with the outside surface 5 is made maximum, and when the space between the pin hole 2 and the slit 3 is minimum, the space between a line connecting the lower end (b) of the slit and the pin hole 2 and the parallel line is made minimum. Many such rotators 1 are connected to each other by a chain, and pulled to for example, the speed is gradually increased according to the guide of an operation rail 6.

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 an escalator, a passenger conveyor, a production line conveyor and the like.

[0002]

2. Description of the Related Art Conventionally, roller chains or belts have been used.

[0003]

However, this has the following drawbacks. (B) Since the chain or belt is structured to operate at a constant speed, it was impossible to accelerate or decelerate during operation. (B) I was not able to meet the demands of the times when I wanted to speed up because I was restricted by the safety of getting on and off and the minimum work speed of the local area. The present invention has been made to eliminate these drawbacks.

[0004]

An operation rail 6 for connecting a rotor 1 provided with a pin hole 2 for inserting a connecting pin 4 and a slit 3 in a wedge shape, and contacting the rotor 1 to operate the same. To provide. The present invention is a variable speed chain configured as described above.

[0005]

The operating speed of the driven object driven by the chain is controlled by operating the rotor 1 of the chain by the operating rail 6 during operation, thereby locally and continuously changing the pitch of the chain. It is a chain that makes it possible to move slowly.

[0006]

[Embodiment 1] Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS.
A rotor having a pin hole 2 and a slit 3, and a slit 3 will be described with reference to FIGS.
As shown by the dotted line in Fig. 1, when the slit lower part where the distance between the pin hole and the slit is the minimum is taken as a reference, the angle between the line connecting the pin hole and any point on the slit and the slit is always 90 degrees or more. It is made to be. The outer surface 5 of the rotor 1 is a line connecting the tip a of the slit and the pin hole 2 and a parallel line circumscribing the outer surface 5 when the distance between the pin hole and the slit is maximum as shown by the solid line in FIG. When the distance between the pin hole and the slit is the minimum and the distance between the pin hole and the slit is the minimum, the distance between the line connecting the slit lower end portion b and the pin hole 2 and the parallel line is minimized, and the intermediate portion thereof is the distance. Is a curve that gradually changes. Reference numeral 4 is a pin for connecting the rotor, and 7 is a guide rail for holding the pin 4. Now, when pulling the chain connecting the rotors to the left in FIG. 3, each rotor tries to move in the direction of lengthening the chain by turning clockwise due to the relationship between the angle of the slit 3 and the pin hole 2. Since the outer surface 5 of the rail 8 is held down, the rail 8 cannot move at a stretch, and the rail 8 gradually moves while increasing its length according to the guidance of the operation rail, that is, the driven object driven by the chain also. The speed will be gradually increased. FIG. 4 shows the movement of each part when decelerating. When the chain is pulled to the left in the figure, the rotor at the right end, which was in the longest state, is moving to the left while moving to the operation rail 6
The outer surface 5 is pushed up by the pin 4, and the pin 4 in the slit 3 is pushed up and down by the guide rail 7 so that it moves downward in the slit while attracting the adjacent rotor. In response to this, the rotor turns counterclockwise around the pin hole to shorten its length and slow the moving speed of the driven object.

[0007]

Second Embodiment A second embodiment of the present invention will be described below. (A) The rotor 1 is provided with the pin hole 2, the slit 3 and the operation roller holding portion 8. (B) The slit 3 is gently displaced so that the connecting pin 4 can smoothly move between the maximum pitch shown by the solid line and the minimum pitch shown by the dotted line. In order to stabilize the pin 4 when operating at the minimum pitch, the clearance a is provided in the minimum pitch portion of the slit 3. (C) The operation roller 9 that engages with the operation rail 6 is attached to the operation roller holding portion 8. (D) Insert the pin 4 into the pin hole 2 of the rotor (I) and the slit 3 of the rotor (II) located next to the rotor and connect them, and connect the guide rail 7 to one end of the pin 4. The guide roller 10 which engages is attached. (E) At the position where the chain starts to shift from the minimum pitch to the maximum pitch, the center is supported by the operation cam fulcrum 11, and both ends b and c of the operation cam 12 contact the operation low and low.
To provide. Since the present invention has the above-described structure, the case of increasing the speed from the minimum pitch to the maximum pitch will be described. In the rotor 1 moving at the minimum pitch, the pin 4 has the position of the escape a of the slit 3 as shown in FIG. It is moving in the direction of the arrow. However, when the rotor comes to the position of the operation cam 12, one end b of the operation cam is pushed up by the operation roller, and
The other end c and the operation roller in contact with this are pushed down with 1 as the fulcrum, the pin is released from the escape a, and thereafter, as shown in FIG.
As shown in (4), the rotor turns clockwise while being controlled by the operation rail 6 to increase the pitch, that is, the speed is increased. When decelerating from the maximum pitch to the minimum pitch, as shown in FIG. 11, the operation roller 9 of the rotor moving in the direction of the arrow is pulled up by the operation rail-6, and the rotor 1 turns counterclockwise. Guide roller 1
Since 0 is held by the guide rail 7, the pin directly connected to it moves toward the direction of the minimum pitch in the slit. At this time, as the pin moves, the adjacent rotor is pulled and the chain is operated. The pitch will be gradually reduced while being controlled by the rail.

[0008]

[Effects of the Invention] During operation, the pitch of the drive chain can be freely manipulated from maximum to minimum or vice versa, and the moving speed of the driven object is locally increased or decreased to carry the transportation that the conventional chain has destined to have. It releases the restriction of speed.

[Brief description of drawings]

FIG. 1 is a front view of a rotor according to a first embodiment.

FIG. 2 is a plan view of the rotor according to the first embodiment.

FIG. 3 is an explanatory diagram showing a situation at the time of increasing speed according to the first embodiment.

FIG. 4 is an explanatory diagram showing a situation during deceleration according to the first embodiment.

FIG. 5 is a cross-sectional view of the rotor according to the first embodiment.

FIG. 6 is a front view of a rotor according to a second embodiment.

FIG. 7 is a cross-sectional view of an operation roller holding portion according to a second embodiment.

FIG. 8 is a cross-sectional view showing a connected state of the rotor according to the second embodiment.

FIG. 9 is an explanatory diagram at the start of acceleration according to the second embodiment.

FIG. 10 is an explanatory diagram showing a situation during acceleration according to the second embodiment.

FIG. 11 is an explanatory diagram showing a situation during deceleration according to the second embodiment.

[Explanation of symbols]

1 Rotor 2 Pin hole 3 Slit
4 pins 5 outer surface 6 operation rail 7 guide rail 8 operation rail holder 9 operation roller 10
Guide roller 11 Operation cam fulcrum 12 Operation cam

Claims (1)

[Claims] 1. A variable speed chain comprising a rotor 1 provided with a pin hole 2 for inserting a connecting pin 4 and a slit 3 and connected in a wedge shape, and an operating rail 6 in contact with the rotor 1.