KR101367299B1 - Meandering preventing apparatus and meandering prevention method using the same - Google Patents

Abstract

The meandering prevention device according to the present invention supports the roller for transporting the belt, and the rotatable rotating stand, the first and second side facing each other so as to be in contact with both side portions of the belt in a direction orthogonal to the running direction of the belt. A first drive unit positioned between the roller, the first side roller, and the second side roller, one end of which is connected to the rotating stand, a rotatable rotating lever, one of which is connected to the rotating lever, and the other end of which is connected to the first side roller And a second drive unit having one end connected to the rotation lever and the other end connected to the second side roller.
According to the embodiments of the present invention, as the side rollers are installed in contact with the belt, the meandering prevention device operates even if the degree of meandering of the belt is small. Thus, the meandering of the belt can be prevented more efficiently than in the prior art.

Description

Meandering prevention device and meandering prevention method using the same {MEANDERING PREVENTING APPARATUS AND MEANDERING PREVENTION METHOD USING THE SAME}

The present invention relates to a meandering prevention device and a meandering prevention method using the same, and more particularly, to a meandering prevention device and a meandering prevention method using the same that can easily return the belt to the normal path when the meandering of the belt.

Cargoes such as ores, coal, coke, etc. are unloaded through a cargo handling unit and then transported to a yard in a steel mill through a conveyor belt. The cargo, such as the size, weight and type of the cargo Depending on the conditions, or depending on the operating condition of the operating conveyor belt, skewing of the belt occurs on the conveyor belt of the lower line which is loaded through the chute.

Here, the meandering of the conveyor belt is caused by a knitting that is driven to the left and right sides of the belt without being loaded at the center portion of the conveyor belt when a large amount of the cargo is temporarily loaded through the chute to the conveyor belt of the lower line. In other words, when a shipment is loaded in the center of the conveyor belt through the chute, the conveyor belt is normally transported, but when the shipment is loaded on the conveyor belt left or right, the conveyor belt does not run normally, but shifts to the right or left to run inclined. do.

Therefore, a skew prevention device for preventing skewing of the belt is separately installed in the conveyor equipment.

A typical meander prevention device is located below the carrier roller to support the carrier roller, and includes a rotatable rotating stand and first and second side rollers installed on each of the left and right lateral directions of the belt. Here, the first side roller is connected to one end of the rotary stand, the second side roller is connected to the other end of the rotary stand. Each of the first and second side rollers is disposed to be spaced apart from the left side and the right side of the belt.

Hereinafter, the operation of the conventional meander prevention device as described above will be briefly described. If the belt meanders, for example, to the left, while driving the shipment, the left side of the belt is in contact with the first side roller. And the contacted 1st side roller rotates, maintaining the state which contacted the belt. As a result, the end portion of the rotary stand connected to the first side roller is slowly rotated about the rotation axis to be horizontally displaced. Accordingly, as the belt support surface of the carrier roller is inclined, the surface frictional force is changed, and thus the force is applied in the direction opposite to the direction in which the belt is meandered, and returned to run in the normal path without meandering. In addition, since the belt is in contact with the carrier roller, a force acts on the carrier roller, the rotary stand, and the first and second side rollers in the direction opposite to the meandering direction.

However, in the conventional meandering prevention device, the amount of rotation of the rotary stand and the amount of movement of the first and second side rollers are not constant. Therefore, even if a force is applied to the rotating stand and the first and second side rollers in a direction opposite to the meandering direction, the rotating stand and the first and second side rollers cannot be returned to their initial position (the position before the meandering state). Problems arise. That is, there is a problem that the rotary stand, the first and second side rollers are excessively moved in the direction opposite to the meandering direction or too little. In this way, when the rotary stand and the first and second side rollers do not return normally, the conveyed goods fall because the belt is still meandering. Therefore, a stable operating environment cannot be maintained.

In addition, when the belt travels in the normal path, since the first and second side rollers are spaced apart from the belt, the meandering prevention device does not operate when the size of the meandering degree of the belt is small.

Korean Patent Laid-Open Publication No. 1999-015968 discloses a lower stand, side stands installed in a direction perpendicular to both side ends of the lower stand, and an upper stand and an upper stand rotated left and right through a bearing provided at the center of the bottom surface of the lower stand. A return roller rotatably mounted along the upper surface via the support shaft 131, a conveyor belt mounted closely along the outer surface of the return roller, and mounted on the side of the return roller to grab the conveyor belt It is composed of side rollers.

Korean Patent Publication No. 1999-015968

One technical problem of the present invention is to provide a meandering prevention device and a meandering prevention method using the same to prevent meandering of the belt.

Another technical problem of the present invention is to provide a meandering prevention device using a constant amount of movement of the carrier stand and the side rollers, and a meandering prevention method using the same, as compared with the related art.

The meandering prevention device according to the present invention supports a roller for transporting a belt, the rotatable rotating stand; First and second side rollers disposed to be in contact with both side portions of the belt in a direction orthogonal to a running direction of the belt; A rotation lever positioned between the first side roller and the second side roller, one end of which is connected to the rotation stand and rotatable; It is installed in both directions about the rotation lever, each end is connected to the rotation lever, the other end is respectively connected to the first and second side rollers, the rotation lever, the first according to the movement of the belt First and second drives for moving the first and second side rollers.

The first and second driving units have elastic force.

The first driving unit may include: a first moving member having one end connected to the first side roller; And a first connecting member having one end connected to the first moving member and the other end connected to the rotation lever, wherein the second driving part includes: a second moving member connected at one end to the second side roller; And a second connecting member having one end connected to the second moving member and the other end connected to the rotation lever.

The first moving member may include: a first moving rod having one end connected to the first side roller; And a first elastic member connected to the first moving rod, wherein the second moving member comprises: a second moving rod having one end connected to the second side roller; And a second elastic member connected to the second moving rod.

First and second bodies for receiving the first and second elastic members, respectively; One end is connected to each of the first and second bodies, and the other end includes a support connected to the rotating stand.

It is preferable to use springs as the first and second elastic members.

The present invention relates to a method of preventing meandering of a belt, the process of driving the belt while the side rollers are in contact with each of both side portions of the belt in a direction orthogonal to the running direction of the belt; Moving the side rollers in a meandering direction of the belt when the belt is meandered so as to be biased in one of the two side portion directions; Rotating the roller supporting the belt and the stand supporting the roller in a meandering direction of the belt; Moving the belt in a direction opposite to the meandering direction; Moving the side rollers in a direction opposite to a meandering direction of the belt; And a roller supporting the belt and a stand supporting the roller are rotated in a direction opposite to a meandering direction of the belt.

When the belt is meandered so as to be biased in either of the side surface directions, the side rollers located in the meandering direction move in the meandering direction by the elastic force.

When the belt is meandered so as to be biased in either of the side surface directions, the roller and the stand are rotated in the meandering direction by an elastic force.

The side roller moves in a direction opposite to the meandering direction of the belt, and the side roller moves in a direction opposite to the meandering direction of the belt due to the elastic force generated by the side roller moving in the meandering direction when meandering. Is returned.

The roller and the stand supporting the belt rotate and return in a direction opposite to the meandering direction of the belt, wherein the roller and the stand are rotated by the elastic force generated when the roller and the stand are rotated in the meandering direction. The belt is returned by rotating in a direction opposite to the meandering direction of the belt.

According to the embodiments of the present invention, as the side rollers are installed in contact with the belt, the meandering prevention device operates even if the degree of meandering of the belt is small. Thus, the meandering of the belt can be prevented more efficiently than in the prior art.

In addition, as the rotary stand and the side rollers are connected to the driving unit having elastic force, the amount of rotation of the rotary stand and the amount of movement of the side rollers can be made constant. Thus, the rotary stand and the side rollers can be returned to an accurate position as compared with the prior art. Therefore, the problem of maintaining the meandering state of the belt even after the operation of the meandering preventing device can be prevented as in the related art. As a result, it is possible to prevent the falling of the transport goods due to meandering of the belt, and to maintain a stable operating environment.

1 and 2 is a view showing the main portion of the conveyor equipment equipped with a meander prevention device according to an embodiment of the present invention
3 is a view for explaining a meandering prevention device according to an embodiment of the present invention;
4 is a top view for explaining the upper meander prevention device according to an embodiment of the present invention.
5A to 5B are diagrams for sequentially explaining the operation of the upper meander prevention apparatus according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention and to those skilled in the art. It is provided for complete information.

1 and 2 is a view showing the main portion of the conveyor facility equipped with a meandering prevention device according to an embodiment of the present invention. Here, FIG. 1 is a view showing a conveyor facility viewed from the upper side of the carrier belt, and FIG. 2 is a view showing a conveyor facility viewed from the lower side of the return belt. 3 is a view for explaining a meandering prevention apparatus according to an embodiment of the present invention. 4 is a top view for explaining the upper meander prevention device according to an embodiment of the present invention.

In the following, for convenience of description, the conveyor belt region located relatively upward is referred to as a carrier belt, and the conveyor belt region located below is referred to as a return belt.

1 and 2, the conveyor equipment is arranged to be spaced apart from each other so as to be arranged in the extending direction of the frame 100 at an upper side of the frame 100 installed in one direction, the frame 100, and the carrier belt B1. A plurality of carrier roller 300 to transfer, a plurality of carrier roller fixing stand 200, one end is connected to the carrier roller 300 and the other end is connected to the frame 100 to support the carrier roller 300, the frame An upper meandering prevention device 600 installed above the 100 to prevent meandering of the carrier belt B1, a return roller 800 installed below the frame 100 to convey the return belt B2, and one end The return roller fixing stand 500 connected to the frame 100 to fix the return roller 800, and the lower meander prevention device 700 installed below the frame 100 to prevent meandering of the return roller 800. It includes.

1 to 3, the carrier roller 300 is disposed on both sides of the horizontal roller 300a and the horizontal roller 300a and installed to be inclined upward, respectively, as shown in FIGS. 1 to 3. , 300b-2). Of course, the carrier roller 300 is not divided into a plurality of rollers as described above, it can be manufactured in one piece.

The installation structure and configuration of the frame 100, the carrier roller 300, the carrier roller fixing stand 200, the return roller 800, the return roller fixing stand 500 of the conveyor apparatus according to the embodiment of the present invention is typically Since it is similar to the conveyor equipment used, description thereof will be omitted.

3 and 4, the upper meander prevention device 600 which prevents meandering of the carrier roller 300 may include a rotation stand 620 positioned between the carrier roller fixing stand 200 and the carrier roller 300. One end is connected to the carrier roller 300 and the other end is connected to the rotary stand 620 in the direction orthogonal to the extending direction of the carrier roller support 210 and the carrier belt B1 supporting the carrier roller 300, First and second side rollers 610a and 610b installed to be in contact with both sides of the carrier belt B1, respectively, and one end thereof is installed to connect between the rotating stand 620 and the carrier roller fixing stand 200. Possible rotation lever 630, one end is connected to the first side roller 610a, the other end is connected to the other end of the rotation lever 630, the first drive unit 640a, one end is the second side roller 610b Is connected to the other end of the rotary lever 630. A first and a second driving section (640b). In addition, a separate rotating shaft (not shown) may be installed between the carrier roller fixing stand 200 and the rotating stand 620, and the rotating shaft is connected to the rotating lever 630 to rotate.

The rotating stand 620 is manufactured in a bar shape extending in a direction corresponding to the extending direction of the carrier roller 300, the cross-sectional shape of the rotating stand 620 according to the embodiment is inverted of the letter "V" Shape. Of course, the shape of the rotating stand 620 is not limited thereto, and may be manufactured in various shapes extending in a direction corresponding to the extending direction of the carrier roller 300. In addition, a plurality of carrier roller support members 210 are installed in a direction perpendicular to the rotation stand 620 to support the carrier roller 300.

As shown in FIG. 1, each of the first and second side rollers 610a and 610b is provided to be in contact with both side portions in the direction orthogonal to the extending direction of the carrier belt B1, that is, the long side portions on both sides. For example, the first side roller 610a is installed to be in contact with the left long side of the carrier belt B1, and the second side roller 610b is installed to be in contact with the right long side of the carrier belt B1. Each of the first and second side rollers 610a and 610b is manufactured in the shape of a wheel provided with a groove along an outer circumferential surface thereof and rotates with the carrier belt B1 inserted into the groove. Of course, the shape of each of the first and second side rollers 610a and 610b is not limited to the wheel shape, and may be manufactured in various shapes capable of rotating in contact with the carrier belt B1.

The rotary lever 630 rotates the rotary stand 620 by the operation of the first and second side rollers 610a and 610b and the first and second drivers 640a and 640b. The rotary lever 630 is located between the first side roller 610a and the second side roller 610b, one end of which is mounted between the rotary stand 620 and the carrier roller fixing stand 200, and the other end will be described later. The first and second drivers 640a and 640b. That is, one end of the rotary lever 630 is installed to connect between the rotary stand 620 and the carrier roller fixing stand 200, the other end is the first and second side rollers (610a, 610b) or the first and second The driving units 640a and 640b are installed to protrude in the direction in which they are located. And one end of the rotary lever 630 is preferably installed so as to be located in the center between the rotation stand 620 and the carrier roller fixing stand 200.

The first and second driving units 640a and 640b rotate the rotating stand 620 and the carrier roller 300 connected to the rotating stand 620 in a meandering direction, and use the elastic force to rotate the rotating stand 620 and the carrier. It serves to return the roller 300 again. The first and second drivers 640a and 640b are arranged to be symmetrical with respect to the rotation lever 630. In other words, the first driver 640a is installed to connect between the first side roller 610a and the rotation lever 630, and the second driver 640b is the second side roller 610b and the rotation lever 630. ) Is installed to connect between. Accordingly, the first driver 640a and the second driver 640b are disposed to face each other with respect to the rotation lever 630.

Hereinafter, the first driver 640a will be described first.

One end of the first driving unit 640a is connected to the first side roller 610a, the first moving member 641a having an elastic force, one end is connected to the first moving member 641a, and the other end thereof is the rotation lever 630. And a first connecting member 642a connected to it. Here, as shown in the enlarged view of FIG. 3, the first moving member 641a includes a first body 641a-1 and one end of which the first elastic member 641a-3 is installed therein and the first elastic member ( It includes a first moving rod (641a-2) connected to the 641a-3 and the other end is protruded out of the first body (641a-1) and connected to the lower portion of the first side roller (610a). In the embodiment, a spring is used as the first elastic member 641a-3. The first connecting member 642a is formed in a bar shape extending in one direction, one end of which is connected to the first moving rod 641a-2 of the first moving member 641a, and the other end of the rotating lever ( 630. In this case, the other end of the first connection member 642a may be connected to the rotation lever 630 through a separate connection pin.

The second driver 640b has the same configuration as the first driver 640a described above. Therefore, the description overlapping with the first driver 640a will be omitted or briefly described. One end of the second driving unit 640b is connected to the second side roller 610b, the second moving member 641b having an elastic force, one end thereof is connected to the second moving member 641b, and the other end thereof is the rotation lever 630. And a second connecting member 642b connected to it. Here, the second moving member 641b and the second connecting member 642b have the same configuration and shape as the first moving member 641a and the first connecting member 642a described above.

The operation of the first and second drivers 640a and 640b is determined according to the meandering direction of the carrier belt. In more detail, for example, when the carrier belt B1 is meandered to the left side, a force acting on the carrier belt B1 to push the first side roller 610a to the left acts, thereby causing the first side roller. A force pulled to the left is applied to the first moving rod 641a-2 connected to the 610a. Since the first moving rod 641a-2 is connected to the first elastic member 641a-3, the first moving rod 641a-2 is relaxed as the first elastic member 641a-3 relaxes in the left direction. Is pulled to the left. In addition, the first connecting member 642a is also pulled to the left side by the force to which the first moving rod 641a-2 is pulled to the left, so that the rotary lever 630 connected to the first connecting member 642a is Rotate or tilt clockwise. At this time, the second connecting member 642b connected to the rotary lever 630 is pulled to the left by rotating the rotary lever 630 in the clockwise direction, whereby the second side roller 610b and the second moving rod. Force 641b-2 is pulled to the left. Here, since the second moving rod 641b-2 is connected to the second elastic member 641b-3, the second moving member 641b-3 is contracted to the left side and thus the second moving rod 641b-2. ) Moves to the left.

In addition, the rotation lever rotates clockwise according to the operation of the first and second driving units 640a and 640b, and the rotation stand 620 connected to the rotation lever 630 also rotates clockwise.

As described above, the first elastic member 641a-3 is relaxed by the meandering of the carrier belt B1, and the second elastic member 641b-3 is contracted. The first and second elastic members 641a- 3, 641b-3 each of the elastic force facilitates the return of the first and second side rollers (610a, 610b) and the rotary stand 620. That is, the first and second side rollers 610a and 610b and the rotating stand (the amount of the first and second elastic members 641b-3 are relaxed or shrunk by meandering of the carrier belt B1). 620 is moved, and the first and second side rollers 610a and 610b and the rotation stand are moved in the opposite direction and returned by the elastic force of the first and second elastic members 641b-3. Therefore, as in the related art, it is possible to prevent the first and second side rollers 610a and 610b from not returning or moving to another position beyond the initial position.

In the above description, for example, the carrier belt 300 meanders to the left side, but the carrier belt 300 may meander to the right side, wherein the first and second driving units 640a and 640b, the rotation lever 630, and The operation of the rotary stand 620 operates in the opposite direction to the above-described example.

The lower meandering prevention device has the same configuration as the upper meandering prevention device described above. Therefore, in the following description of the lower meandering prevention device, the content overlapping with the above-mentioned upper meandering prevention device is omitted or briefly described.

Referring to FIG. 2, the lower meander prevention device 700 which prevents meandering of the return roller may include a return rotation stand 720 positioned between the return roller fixing stand 500 and the return roller 800, and one end of the return roller ( A third roller which is connected to the return roller supporter 800 connected to the return rotation stand 720 and the other end of the return belt B2 orthogonal to the extension direction of the return belt B2, respectively, to be in contact with both side surfaces of the return belt B2. And fourth side rollers 710a and 710b, one end of which is installed to connect between the return rotation stand 720 and the return roller fixing stand 500, and a rotatable return rotation lever 730, and one end of the third side roller ( A third driving unit 740a connected to the other end of the return rotation lever 730, one end of which is connected to the fourth side roller 710b, and the other end of which is connected to the other end of the return rotation lever 730. It includes a fourth drive unit 740b connected to.

The return rotation lever 730 is positioned between the third side roller 710a and the fourth side roller 710b, one end of which is mounted between the return rotation stand 720 and the return roller fixing stand 500, and the other end thereof is The third and fourth drivers 740a and 740b are connected to each other. At this time, one end of the return rotation lever 730 is preferably installed to be located in the center between the return rotation stand 720 and the return roller fixing stand 500.

The third and fourth driving units 740a and 740b rotate the return rotation stand 720 and the return roller 800 connected to the return rotation stand 720 in a meandering direction, and use the elastic force to return the return rotation stand 720. And the return roller 800 again. The third and fourth drivers 740a and 740b are disposed to be symmetrical with respect to the return rotation lever 730.

Since the operation of the lower meander prevention apparatus 700 having such a configuration is the same as the operation of the upper meander prevention apparatus 600 described above, a separate description thereof will be omitted.

5A to 5B are diagrams for sequentially explaining the operation of the upper meander prevention apparatus according to the embodiment of the present invention. In the following, with reference to 5a and 5b, the operation of the meandering prevention device when the conveyor belt is meandered to the left side will be described. And when the carrier belt travels in the normal path without meandering as shown in Fig. 4, the line passing through the center of the rotation lever in the extending direction of the carrier belt is named "center".

For example, as shown in FIG. 5A, when the carrier belt B1 is meandered to the left direction, that is, the direction in which the left side roller 610a (hereinafter, referred to as the first side roller 610a) is located, the carrier belt ( B1) acts to push the first side roller 610a to the left. Accordingly, a force pulled to the left is applied to the first moving rod 641a-2 connected to the first side roller 610a, and thus the first elastic member 641a connected to the first moving rod 641a-2. -3) extends to the left. The first moving rod 641a-2 is easily moved to the left side by the extension of the first elastic member 641a-3, and the first connecting member 642a connected to the first moving rod 641a-2 is also Is pulled to the left. As a result, the rotation lever 630 connected to the first connection member 642a is rotated or tilted in a clockwise direction.

At this time, the second connecting member 642b connected to the rotary lever 630 is pulled to the left by the rotation of the rotary lever 630 in a clockwise direction. Therefore, the force pulled to the left is applied to the second side roller 610b and the second moving rod 641b-2. Here, since the second moving rod 641b-2 is connected to the second elastic member 641b-3, the second moving member 641b-3 is contracted to the left side and thus the second moving rod 641b-2. ) Moves to the left.

In addition, according to the operation of the first and second driving units 640a and 640b, the rotary lever 630 rotates in a clockwise direction as shown in FIG. 5A, and a rotary stand 620 connected to the rotary lever 630. ) Also rotates clockwise. Thus, the carrier roller 300 disposed on the rotary stand 620 is rotated to be biased in a meandering direction, that is, the left direction.

As such, when the rotary stand 620 and the carrier roller 300 are rotated in a meandering direction, the carrier belt B1 supporting surface of the carrier roller 300 is inclined. Accordingly, the contact force and the contact area of the carrier belt B1 vary depending on the area of the carrier roller 300, so that the friction force between the carrier roller 300 and the carrier belt B1 is changed. Therefore, the carrier belt B1 runs normally while moving to the carrier belt B1 in the direction opposite to the meandering direction.

When a force acting in the opposite direction to the meandering direction is applied to the carrier belt B1 as described above, the carrier roller 300 and the rotating stand 620 supporting the carrier belt B1 are also opposite to the meandering direction. Is exerted. In this case, since the rotating stand 620 according to the embodiment is connected to the first and second driving units 640a and 640b having elastic force, as shown in FIG. 5B, the first and second driving units 640a, The rotation is reversed by the elastic force of 640b). In addition, since the first and second side rollers 610a and 610b are connected to the first and second drive units 640a and 640b, respectively, the first and second side rollers 610a and 610b are also first and second. It is returned by moving in the direction opposite to the meandering direction by the elastic force of the two drive parts 640a and 640b. More specifically, the first elastic member 641a-3 is relaxed by the left meander of the carrier belt B1 and the amount (or size) of the second elastic member 641b-3 is retracted. The rotation lever 630 rotates clockwise by the amount in which the first elastic member 641a-3 is relaxed and the second elastic member 641b-3 is contracted, and the first and second side rollers 610a and 610b are rotated. Moves in the meandering direction. Then, when the force in the opposite direction is applied to the meandering carrier roller 300, the first elastic member 641a-3 is relaxed again by the amount relaxed in meandering, and the second elastic member 641b-3 is returned. It is retracted by the contracted amount and returned. The rotational stand 620 and the first and second side rollers 610a and 610b are in a meandering direction by an amount in which the first elastic member 641a-3 is relaxed and an amount in which the second elastic member 641b-3 is contracted. It is returned by moving in the opposite direction to.

For this reason, the rotation amount of the rotation stand 620 and the 1st and 2nd side rollers 610a and 610b can be made constant. Accordingly, during the return operation of the rotary stand 620 and the first and second side rollers 610a and 610b, they are excessively moved as in the prior art to further deteriorate the meandering degree of the carrier belt B1 or the carrier belt ( The problem which damages B1) can be prevented. In addition, as the return of the rotary stand 620 and the first and second side rollers 610a and 610b is more accurate than in the related art, it is possible to reduce the problem of dropping the cargo due to meandering of the carrier belt B1.

In the above, the case where the carrier belt B1 meanders left was demonstrated. However, the carrier belt B1 may meander to the right, and at this time, the operation of the upper meander prevention device 600 operates in the opposite direction to the above case.

In addition, although not separately described, the operation of the lower meandering device 700 when the return belt B2 meanders is the same as the description of the operation of the upper meandering device 600 described above.

B1: carrier belt B2: return belt
620a and 620b: side rollers 640a and 640b: drive part

Claims (11)

A rotating stand for supporting a roller for conveying a belt;
First and second side rollers disposed to be in contact with both side portions of the belt in a direction orthogonal to a running direction of the belt;
A rotation lever positioned between the first side roller and the second side roller, one end of which is connected to the rotation stand and rotatable;
It is installed in both directions about the rotation lever, each end is connected to the rotation lever, the other end is respectively connected to the first and second side rollers, the rotation lever, the first according to the movement of the belt A meandering prevention device including first and second driving parts for moving the first and second side rollers. The method according to claim 1,
The first and second driving unit has a meandering prevention device having an elastic force. The method according to claim 1 or 2,
Wherein the first driving unit includes:
A first moving member, one end of which is connected to the first side roller; And
One end is connected to the first moving member, and the other end is provided with a first connection member connected to the rotation lever,
Wherein the second driver comprises:
A second moving member, one end of which is connected to the second side roller; And
And a second connecting member having one end connected to the second moving member and the other end connected to the rotation lever. The method according to claim 3,
The first moving member,
A first moving rod having one end connected to the first side roller; And
A first elastic member connected to the first moving rod,
The second moving member,
A second moving rod having one end connected to the second side roller; And
Meandering prevention device consisting of a second elastic member connected to the second moving rod. The method of claim 4,
First and second bodies for receiving the first and second elastic members, respectively;
One end is connected to each of the first and second body, the other end is a meander prevention device comprising a support connected to the rotating stand. The method of claim 4,
The meandering prevention device using a spring as said 1st and 2nd elastic member. In the method of preventing meandering of the belt,
Driving the belt in a state in which side rollers are in contact with each of both side portions of the belt in a direction orthogonal to a running direction of the belt;
Moving the side rollers in a meandering direction of the belt when the belt is meandered so as to be biased in one of the two side portion directions;
Rotating the side roller in a meandering direction of the belt and rotating the roller supporting the belt and the stand supporting the roller in one of a clockwise direction and an opposite direction of the clockwise direction;
Moving the belt in a direction opposite to the meandering direction;
Moving the side roller in a direction opposite to the meandering direction of the belt by returning the belt in a direction opposite to the meandering direction;
The roller supporting the belt and the stand are rotated in one of a clockwise direction and a counterclockwise direction by the side roller moving and returning in a direction opposite to the meandering direction of the belt. Including,
The rotational direction of the roller and the stand due to the movement of the side rollers in a direction opposite to the meandering direction of the belt is the rotational direction of the rollers and the stand due to the movement of the side rollers in the meandering direction of the belt. Meandering prevention method in the direction opposite to the direction of rotation. The method of claim 7,
And the side rollers located in the meandering direction are moved in the meandering direction by the force of the meandering of the belt when the belt is meandered so as to be biased in either of the side surface directions. The method according to claim 8,
When the belt meanders to the left side of the belt, the side roller moves in the left direction, and the roller and the stand rotate in the clockwise direction by the left movement of the side roller,
When meandering so that the belt is biased in the right direction of the belt, the side rollers move in the opposite direction as when the belt meanders in the left direction, and the roller and the stand meander when the belt meanders in the left direction. Prevent meandering by rotating in the opposite direction. The method of claim 7,
The side roller moves in a direction opposite to the meandering direction of the belt,
And the side rollers are moved in a direction opposite to the meandering direction of the belt by the elastic force generated by the side rollers moving in the meandering direction during meandering. The method of claim 7,
In the roller and the stand is rotated and returned,
And the roller and the stand are rotated and returned by the elastic force generated when the roller and the stand are rotated in one of a clockwise direction and a counterclockwise direction during the meandering.

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