JPH09235011A - Meandering adjustment device of belt conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a scale of a device and to reduce weight. SOLUTION: A return roller 8 making contact with a lower side part of a belt 5 is installed free to oscillate along a belt surface around a support shaft 9 as its center. The other end side of the return roller 8 is installed in a freely rockable along a guide rail 11 having an arc guide part 12 provided on a frame 3. An oscillating device of the return roller 8 is provided on the other end side of the return roller 8. Meandering detection switches 19, 20 to detect the meandering of the belt 5 are provided on the frame 3. Meandering of the belt 5 is adjusted by rocking the return roller 8 by actuating the rocking device by actuation of the meandering detection switches 19, 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting the meandering of a conveyor in a belt conveyor used in construction machines such as self-propelled crushers and industrial machines.

[0002]

2. Description of the Related Art Generally, a belt attached to a belt conveyor moves linearly except in a special case. However, since the belt is endlessly spliced, it has a slight bending tendency at the joint. Or, an external force may be applied in a direction perpendicular to the unbalanced load.In such a case, the belt meanders and shifts to the side, or in extreme cases, the belt comes off the carrier roller. There is.

In order to prevent such belt meandering,
Japanese Utility Model Laid-Open No. 59-74906 proposes a belt meandering adjusting device having a structure as shown in FIG.
The meandering adjusting device includes a pair of side frames 24 arranged on a frame 23 of a conveyor so as to be parallel to the belt 22.
And a plurality of connecting members 25 for connecting the both side frames 24 so that one of them is movable in parallel with the other, and a carrier roller 26 for guiding the belt mounted on the connecting members 25.
And a meandering detection switch 27 for detecting lateral shake due to meandering of the belt 22, and the one side frame 24 is translated in response to a signal from the meandering detection switch 27 to change the angle of the carrier roller 26 with respect to the belt 22. And a side frame drive device 28 composed of a hydraulic cylinder or a ball screw.

[0004]

However, the above-described conventional meandering adjusting device adjusts the meandering in the upper half portion of the belt 22 on which the load is loaded, and therefore, in the portion of the heavy belt on which the load is loaded. The meandering must be adjusted, and the side frame 2 on which the carrier roller 26 is placed
Since the structure including the 4 and the connecting member 25 is moved, and the carrier roller 26 is moved on the table, the structure of the meandering adjusting device is large and the weight is large, and the belt used in the crusher as shown in FIG. There is a problem in that it is difficult to mount and handle when applied to a narrow space such as the conveyor 2. Further, the conventional meandering adjusting device described above has a problem that the response is slow because the hydraulic cylinder or the ball screw is used as the side frame driving device.

In view of the above-mentioned problems, it is a first object of the present invention to provide a meandering adjusting device for a belt conveyor in which the size of the device is reduced and the weight can be reduced. A second object of the present invention is to provide a meandering adjusting device for a belt conveyor having good responsiveness.

[0006]

According to a first aspect of the present invention, one end of a return roller that abuts on a lower portion of a belt is swingable along a belt surface around a support shaft attached to a frame of a conveyor. The other end of the return roller is mounted movably along a guide rail having an arcuate guide portion provided on the frame, and a return roller swing device is provided on the other end of the return roller. By providing a meandering detection switch for detecting the meandering of the belt on the frame, and operating the rocking device by the operation of the meandering detection switch to rock the return roller,
It is characterized by adjusting the meandering of the belt.

According to a second aspect of the present invention, the swinging device of the return roller forms a pair of a pulley attached to the other end of the return roller and a frame attached so that the pulley is sandwiched with a gap. It is characterized by comprising a pulley, a motor for rotating at least one of the paired pulleys, and a wire rope or belt wound around each of the pulleys.

A third aspect of the present invention is characterized in that a sprocket and a sprocket chain are used instead of the pulley and the wire rope, respectively. The invention of claim 4 is characterized in that the motor is an electric motor.

[0009]

According to the first aspect of the invention, when the belt comes into contact with one of the right and left meandering detection switches by meandering and the meandering detection switch operates, the return roller is swung by the swinging device in the direction corresponding to the meandering detection switch. , Meandering is fixed. In the second or third aspect, when the meandering is detected, the wire rope or the chain is rotated by the operation of the motor, which causes the return roller to swing. Claim 4
In the above, by using the electric motor as the motor for swinging the return roller, it is possible to make a quick response without requiring fluid flow for operation unlike the hydraulic motor.

[0010]

1 is a side view showing an embodiment of a meandering adjusting device for a belt conveyor according to the present invention, FIG.
(B) is a view from the arrow EE of (A), and FIG. 2 is a side view of a crusher to which this embodiment is applied. Crusher 1 shown in FIG.
A belt conveyor 2 for carrying out crushed wastes is supported and attached to the vehicle body of the crusher 1 between the left and right crawler tracks 1a for self-propelling.

The belt conveyor 2 is attached to a frame 3, a drive roller 4 installed at one end of the frame 3 and rotated by a motor (not shown), and attached to the other end of the frame 3, and is driven by a belt 5 from the drive pulley 4. The end rollers 6 to which the movement is transmitted and the driven rollers, a plurality of carrier rollers 7 mounted on the frame 3 and supporting a belt 5 for loading a load, and the lower portion of the belt 5, that is, the upper surface of the return portion are in contact with each other. It has a return roller 8 attached to the frame 3 and having a function of correcting the movement of the belt 5.

Next, the meandering adjusting device according to the present invention for the belt conveyor 2 will be described with reference to FIG. As shown in FIGS. 1 (A) and 1 (B), the return roller 8 is configured to be swingable while abutting on a support shaft 9 attached to one side of the frame 3 and the upper surface of the belt 5. Mounted.
A vertical axis 10 is attached to the other end side of the return roller 8, and the vertical axis 10 is attached to a guide rail 11 provided on the frame 3.
The groove-shaped arc-shaped guide portion 12 is movably penetrated and guided.

A pulley 13 is rotatably attached to the vertical axis 10. In addition, the stepping motor 1 installed on the frame 3 so that the pulley 13 is sandwiched with a gap.
4, a pulley 15 driven by 4 and a pulley 17 having a pulley shaft rotatably attached by a bearing 16 installed on the frame 3 are arranged. These pulleys 13, 15,
As shown in FIG. 1 (C), wire rope 1
8 or the belt is wound around the pulley 13 at least at the end of the return roller 8 so as to make one turn.

A meandering detection switch 1 for detecting the meandering of the belt 5 is provided on both sides of the belt 5 in the frame 3.
9 and 20 are provided. These meandering detection switches 19 and 2
0 is opposed to the side portion of the belt 5 with a gap when the belt 5 is in the normal position without being displaced left and right, and when the belt 5 meanders, the side portion of the belt 5 causes the meandering detection switches 19 and 20. It is configured such that the meandering detection switches 19 and 20 are operated by contacting any one of the strikers.

In this meandering adjusting device, FIG.
When the belt 5 is running as indicated by an arrow X in (B), the meandering of the belt 5 causes the striker of the meandering detection switch 19 (or 20) to hit the end of the belt 5 and the switch 19 (or 20). ) Is operated, the stepping motor 14 is rotated, and by rotating the wire rope 18, the pulley 13 is rotated.
Moves along the guide portion 12 and the return roller 8 swings in the arrow a direction (or the b direction), whereby the meandering of the belt 5 is adjusted.

As described above, if the meandering of the belt 5 is corrected by swinging the return roller 8, the return roller 8 does not carry a load, and therefore the return roller 8 can be moved with a small force. The meandering adjustment device can be made compact and lightweight. In particular, in the case of the belt conveyor 2 used in the crusher as shown in FIG. 2, since it is attached to the crusher, a small and lightweight one that can be installed in a narrow place for installation, handling, maintenance and inspection, etc. Although desired, the present invention can provide a device that meets this demand.

A hydraulic motor, a hydraulic cylinder, or the like may be used as the swinging device of the return roller 8,
If an electric motor such as the stepping motor 14 is used, the pulley 13 can be rotated without the fluid flow, and a quick response is possible.

It is also possible to use a sprocket chain instead of the wire rope 18 (or belt) and a sprocket instead of the pulleys 13, 15 and 17. Further, the present invention can be applied to conveyors for construction machines and industrial machines other than crushers.

[0019]

According to the first aspect of the present invention, the meandering of the conveyor belt is corrected by swinging the return roller that does not carry the load. Therefore, the return roller can be moved with a small force, and the meandering adjusting device can be moved. Can be made compact and lightweight. As a result, according to the present invention, it is possible to provide a conveyor having a suitable structure, such as a conveyor mounted on a crusher, which is supported by another machine and mounted on a narrow space.

According to the second and third aspects, by using the motor as the swinging device, a smaller meandering adjusting device can be realized.

According to the fourth aspect, since the electric motor is used as the drive device of the return roller, it is possible to provide the meandering adjusting device of the belt conveyor having good responsiveness.

[Brief description of drawings]

FIG. 1A is a side view showing an embodiment of a meandering adjusting device of the present invention, FIG. 1B is a view taken along line EE of FIG. 1A, and FIG. It is a figure explaining a turning mode.

FIG. 2 is a side view showing a crusher to which the meandering adjusting device of the embodiment of FIG. 1 is applied.

FIG. 3 is a perspective view showing an example of a conventional meandering adjusting device.

[Explanation of symbols]

2: belt conveyor, 3: conveyor frame, 4: drive roller, 5: belt, 6: end roller, 7: carrier roller, 8: return roller, 9: spindle, 10:
Vertical axis, 11: guide rail, 12: guide part, 13, 1
5, 17: pulley, 14: stepping motor, 16:
Bearing, 18: wire rope, 19, 20: meandering detection switch

Claims (4)

[Claims] 1. A return roller, which comes into contact with a lower portion of a belt, is attached at one end thereof so as to be swingable along a belt surface around a support shaft attached to a frame of a conveyor, and at the other end side of the return roller. , A movably mounted along a guide rail having an arcuate guide portion provided on the frame, a return roller swinging device provided on the other end side of the return roller, and a meander for detecting belt meandering on the frame. A meandering adjusting device for a belt conveyor, characterized in that a meandering of the belt is adjusted by providing a detection switch, and by actuating the meandering detecting switch to actuate the swinging device to swing the return roller. 2. The swinging device for the return roller according to claim 1, wherein the swing device for the return roller forms a pair with a pulley attached to the other end of the return roller, and the pulley is attached to the frame so as to sandwich the pulley with a gap. A meandering adjusting device for a belt conveyor, comprising: a pulley, a motor for rotating at least one of the paired pulleys, and a wire rope or a belt wound around each pulley. 3. The meandering adjusting device for a belt conveyor according to claim 2, wherein a sprocket and a sprocket chain are used instead of the pulley and the wire rope, respectively. 4. The meandering adjusting device for a belt conveyor according to claim 1, wherein the motor is an electric motor.