JP2024027569A - Meander prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a meander prevention device capable of returning a roll to an original posture even when it is a rigid-body cylinder such as an air cylinder.

SOLUTION: In a meander prevention device 14, a part 16 to be mounted is hung by a lever part 24 connected to a frame part 19, and at a pedestal part 18 of the part 16 to be mounted, a roll is mounted which guides a travelling belt. At the part 16 to be mounted, an air cylinder 33 is connected. By a rod part 35, the part 16 to be mounted moves frontward/backward, and when air is discharged from the air cylinder 33, the part 16 to be mounted returns to a reference position and stops due to self-weight and the weight of the roll.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a meandering prevention device that corrects meandering of a running belt by controlling the position of a roll that guides the running belt.

BACKGROUND ART Conventionally, for example, a running belt of a paper machine, such as wire or felt, used in a paper manufacturing process runs through rolls. If the running belt meanders during operation, the meandering is corrected by the meandering prevention device. For example, the invention described in Patent Document 1 below (hereinafter referred to as "publicly known document 1 invention") includes a positioning device attached to the shaft of a roll, and a palm that contacts a running belt to detect meandering of the running belt. It is composed of. One end of the roll does not move, but the other end moves back and forth in the running direction of the running belt due to the operation of the positioning device, so the roll is positioned perpendicular to the running belt. The posture changes to a diagonally crossed posture. When the attitude of the roll changes, the running belt also shifts in the width direction, so the meandering is corrected.

The positioning device of the first invention is of a so-called bellows type. In the bellows type, the attitude of the roll is changed by letting air flow into a bellows-shaped extensible tube and adjusting the air pressure.

Here, an example of a bellows-type conventional device will be explained based on the drawings. FIG. 1 shows the structure of a conventional bellows type device. FIG. 1 shows a state in which the conventional device 1 is attached to the end of a roll (not shown), and the conventional device 1 is viewed from outside the running line toward the axial direction of the roll. As shown in FIG. 1, a receiving part 2 to which the end of the roll is attached is connected to a support base 3, and rubber bellows 4 are connected to both ends of the receiving part 2. The receiving part 2 moves left and right around the support base 3, and when the air pressure applied through the bellows 4 is adjusted, it falls to either the left or the right, and the roll posture changes. After the meandering of the running belt is corrected, it is necessary to return the position of the receiving portion 2 to the center in order to return the roll to its original position. For example, when the receiving part 2 falls to the right side (Fig. 1, bottom diagram), the bellows 4 on the right side is compressed by the receiving part 2 and expands in outer diameter, so the pressure receiving area by the bellows 4 also increases and the reaction force is also increased. growing. Therefore, when the bellows 4 expands again and returns to its original state, the receiving part 2 is pushed to the left and returns to its original position, so that it is always located in the center.

Incidentally, in recent years, in order to expand the production capacity of machines, there has been a demand for faster dewatering and drying in the paper manufacturing process, and each machine is placed in a high temperature environment in order to shorten the drying time. As described above, the bellows used in the Publication No. 1 invention and the conventional device 1 are made of rubber and cannot withstand high-temperature environments.

Therefore, a heat-resistant air cylinder is used instead of the bellows, and a heat-resistant rubber packing containing fluorine is also used.

Japanese Patent Application Publication No. 11-229287

However, unlike the above-mentioned bellows type, air cylinders do not expand the pressure-receiving area due to compression or generate reaction forces, so after the receiving part falls to one side, it returns to its original central position. An external force is required to return it. Furthermore, once the receiver begins to fall, the roll and gravity acting on the receiver will cause the receiver to fall to the limit, so in order to return the receiver to its original central position, an external force against gravity is required. It becomes necessary. Even if the receiving part can be returned to its original central position, if the external force to return it is too strong, the receiving part will pass the central position and fall in the opposite direction. It is even more difficult to keep it still.

The present invention has been proposed in view of these circumstances. An object of the present invention is to provide a meandering prevention device that can easily return a roll to its original position even in a rigid cylinder such as an air cylinder.

In order to achieve the above object, the meandering prevention device according to the present invention includes an automatic guide main body that supports one end of a roll that guides the running belt from the back side across the width direction of the running belt, and a detection part disposed on an edge in the width direction to detect the position of the running belt, and the automatic guide main body part has an attached part to which the one end part is attached, and a part to which the attached part is suspended. a lever portion; and a rigid cylinder connected to the attached portion in a direction along the longitudinal direction of the running belt, and the cylinder pushes the attached portion in response to an output from the detection portion. By pulling, the attached portion moves from a reference position in the longitudinal direction of the running belt, or returns to the reference position due to gravity, thereby changing the attitude of the roll.

In the meandering prevention device according to the present invention, the attached portion includes a base portion connected to a lower end portion of the lever portion and extending upwardly than an upper end portion of the lever portion, and an upper end portion of the base portion. and a pedestal portion connected to and to which the one end portion is attached.

In the meandering prevention device according to the present invention, the lever part is attached to the running belt side in the attached part and to the opposite side of the running belt in the attached part, so that the lever part is attached to the attached part on the side opposite to the running belt. is characterized in that it is composed of

The meandering prevention device according to the present invention includes an automatic guide main body that supports one end of a roll that guides the running belt from the back side across the width direction of the running belt, and an automatic guide main body that supports one end of the roll that guides the running belt from the back side, and a meandering prevention device that is arranged at the edge of the running belt in the width direction. The automatic guide body has an attached part to which one end is attached, a lever part from which the attached part is hung, and an attached part in the longitudinal direction of the running belt. It has a rigid cylinder connected to the attachment part, and the cylinder pushes and pulls the attached part in response to the output from the detection part, so that the attached part moves from the reference position in the longitudinal direction of the running belt, Alternatively, the attitude of the roll is changed by returning to the reference position due to gravity. That is, since the attached part, on which one end of the roll is supported, is suspended by the lever part, it is in a pendulum-like state hanging from the fulcrum. Unless an external force greater than gravity, which is its own weight or the weight of the roll, is applied from the cylinder, the attached part will remain stationary directly below the fulcrum due to the action of gravity, so it will always be at the reference position, and the roll will also remain at a constant position. Maintains posture. Even when the attached part is pushed by the cylinder and moves from the reference position, the attached part is subjected to force due to gravity in the opposite direction to the direction in which it was pushed by the cylinder, so the attached part does not move excessively. Never move to. When the attached part returns to the reference position, gravity is added to the force of the cylinder pushing toward the reference position, and the attached part returns to the reference position. Since the attached part always tries to stay at the reference position due to gravity, it does not unnecessarily reciprocate about the reference position. Therefore, even in the case of a rigid cylinder using air or the like as a medium, the attached portion can appropriately return to the reference position, and the roll can easily be returned to its original position.

In the meandering prevention device according to the present invention, the attached part is connected to the base part which is connected to the lower end part of the lever part and extends upward from the upper end part of the lever part, and to the upper end part of the base part. It has a pedestal portion to which one end portion is attached. This configuration makes it easy to attach the roll to the pedestal. That is, after lifting one end of the roll to an appropriate height, the automatic guide main body is placed below this one end, and the roll is attached to the pedestal by placing and fixing the one end on the pedestal. . In addition, if a roll is attached to the lower end of the lever part, the height at which the roll is lifted needs to be adjusted to the lower end of the lever, and a height sufficient to hang the roll is required, which increases the size of the apparatus.

In the meandering prevention device according to the present invention, the lever portion is attached to the attached portion on the side of the running belt and the attached portion on the side opposite to the running belt, thereby forming a pair of four-bar parallel links. . Therefore, the attached part moves almost horizontally. Furthermore, if there is only one lever part, the trajectory of the attached part will be a semicircular arc with respect to the fulcrum, which may cause the attached part to be twisted due to vertical movement. .

FIG. 1 is a schematic explanatory diagram of a conventional bellows type device. FIG. 2 is a schematic plan view showing how the meandering prevention device according to the embodiment of the present invention is used. FIG. 3 is a front view of the meandering prevention device according to the embodiment of the present invention. FIG. 4 is a plan view of the meandering prevention device according to the embodiment of the present invention. FIG. 5 is a side view of the meandering prevention device according to the embodiment of the present invention. FIG. 6 is a front view showing the operation of the meandering prevention device according to the embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a meandering prevention device according to the present invention will be described based on the drawings. FIG. 2 schematically shows how the meandering prevention device 14 according to the present embodiment is used, and shows a running line on which the running belt 10 is used in a plan view. Hereinafter, as shown in FIG. 2, the longitudinal direction of the running belt 10 will be referred to as front and back (Front, Back), and the width direction of running belt 10 will be referred to as right and left (Right, Left).

As shown in FIG. 2, a long running belt 10 is wound around a plurality of rolls 11 on a running line of a paper machine in a paper manufacturing process or the like. The roll 11 guides the running belt 10 from the back side across the width direction of the running belt 10. One end 12 of the roll 11 is supported by a meandering prevention device 14 and moves through the meandering prevention device 14, but the other end 13 does not move. The meandering prevention device 14 includes an automatic guide main body portion 15 that supports one end portion 12 of the roll 11, and a detection portion 36 disposed on the right edge of the running belt 10. The automatic guide main body part 15 has an attached part 16 to which one end part 12 is attached, and an air cylinder 33 connected to this attached part 16. The detection unit 36 has a palm (not shown) in contact with the edge of the running belt 10 and a detector main body (not shown) connected to the palm, and detects the position of the running belt 10 .

When the running belt 10 meanderes and deviates from side to side while the vehicle is running, the palm is pushed and the amount of displacement of the palm is detected by the detector body. Air is supplied to the detector body from an air compressor (not shown), and air corresponding to the amount of displacement of the palm is supplied to the air cylinder 33 as an output from the detector body. Then, the air cylinder 33 pushes and pulls the attached portion 16 in a direction along the longitudinal direction of the running belt 10. When the attached portion 16 moves, the roll 11 changes from a posture perpendicular to the running belt 10 to a posture diagonally crossing it. When the attitude of the roll 11 changes, the running belt 10 also shifts from side to side, so that the meandering is corrected.

Next, the meandering prevention device 14 will be explained in detail based on the drawings. 3 to 5, the automatic guide body 15 of the anti-meandering device 14 is shown.

As shown in FIGS. 3 to 5, the automatic guide main body section 15 includes a frame section 19, a lever section 24 connected to the frame section 19, and an attached section 16 suspended by the lever section 24. , and an air cylinder 33 connected to the attached portion 16. The frame portion 19 includes a frame stand 20 and a pair of left and right plate-shaped frames 21 attached to the frame stand 20 via a position adjustment mechanism. The frame stand 20 is fixed to the installation surface. The position adjustment mechanism manually adjusts the position of the plate-like frame 21. When the handle 29 is operated, the rail portion 30 moves back and forth, and the plate-shaped frame 21 fixed to the rail portion 30 also follows and moves back and forth. The amount of movement of the rail 30 section appears on the adjustment scale 31.

The plate frame 21 is composed of a left plate frame 22, which is the side on which the running belt 10 is located, and a right plate frame 23, which is the side opposite to the running belt 10 with respect to the attached part 16. 22 and 23 are facing each other. Each of the plate-like frames 22 and 23 has an attached part 16 connected to the inner side via a lever part 24, and an air cylinder 33 attached to the rear end. The lever section 24 has a long plate shape and is composed of four levers. The upper end of the first lever 25 and the upper end of the second lever 26 are connected to the upper inner surface of the right plate-shaped frame 23, and the upper end of the third lever 27 and the upper end of the fourth lever 28 are connected to the left plate-shaped frame 23. It is connected to the upper part of the inner surface of 22. The attached portion 16 is connected to the lower end of the first lever 25 , the lower end of the second lever 26 , the lower end of the third lever 27 , and the lower end of the fourth lever 28 .

The attached part 16 has a base part 17 connected to the lower end of each lever 25 , 26 , 27 , and 28 , and a pedestal part 18 connected to the upper end of this base part 17 . The base portion 17 extends upward and reaches above the upper end portions of the levers 25, 26, 27, and 28 and the plate frames 22 and 23. The pedestal portion 18 has a flat plate shape and is arranged above each of the plate frames 22 and 23. One end portion 12 of the roll 11 is attached to the base portion 18 (see FIG. 2).

Of the attached part 16, the left side, which is the running belt 10 side, is suspended by the third lever 27 and the fourth lever 28, and the right side, which is the opposite side of the running belt 10, is suspended by the first lever 25 and the second lever 26. By being lowered, the attached portion 16 and each of the levers 25, 26, 27, and 28 form a pair of left and right four-bar parallel links. Therefore, the attached part 16 is suspended by each lever 25, 26, 27, 28, and hangs from the connection point between the upper end of each lever 25, 26, 27, 28 and the attached part 16 as a fulcrum. It is possible to move back and forth in this state.

Since the air cylinder 33 is a double-acting piston cylinder made of metal and is a rigid body, the cylinder portion 34 does not compress or expand its outer diameter like rubber even when air flows in, and does not deform. The rod portion 35 is connected to the base portion 17 of the attached portion 16 in a direction along the front-rear direction. Therefore, when the rod section 35 is moved forward by air, the base section 17 is pushed from behind and moved forward, and when the rod section 35 is retreated, the base section 17 is pulled backward and moved rearward. The packing (not shown) built into the air cylinder 33 is heat-resistant and contains fluorine.

Next, the operation of the attached portion 16 will be explained based on the drawings, together with the effects of this embodiment. FIG. 6 shows the automatic guide body 15 after the anti-meandering device 14 has been operated.

As shown in FIGS. 3 and 6, the attached portion 16 is pushed and pulled by the air cylinder 33 and moves back and forth. Furthermore, when no external force is applied from the air cylinder 33, the attached portion 16 remains stationary at the reference position due to the action of gravity. To be more specific, in the air cylinder 33, when the air pressure is the same and balanced on the rod side and the head side, and the external force from the air cylinder 33 is smaller than the gravity and does not act on the attached part 16, as shown in FIG. As shown, each lever 25, 26, 27, 28 is in a posture extending straight down from the fulcrum, and the attached part 16 is its own weight or the weight of the roll 11 attached to the pedestal part 18. It remains stationary at the bottom due to the action of gravity. This is the reference position, and the reference position appears on the position scale 32. Therefore, the attached portion 16 is always at the reference position due to gravity. In the air cylinder 33, when the air on the head side increases (or the air on the rod side decreases) and the rod part 35 moves forward, the base part 17 of the attached part 16 moves forward, as shown in FIG. Pushed by the rod portion 35, the attached portion 16 moves forward approximately horizontally from the reference position about the fulcrum. Similarly, when the air on the rod side increases (or the air on the head side decreases) and the rod part 35 retreats, the base part 17 of the attached part 16 is pulled by the rod part 35, and the attached part 16 moves approximately horizontally backward from the reference position around the fulcrum. Even when the attached part 16 moves back and forth, a force is applied to the attached part 16 due to gravity in the direction opposite to the direction in which the rod part 35 pushes and pulls the attached part 16. Do not move excessively. On the other hand, after the attached part 16 moves back and forth from the reference position, the attached part 16 is pushed and pulled by the rod part 35 in a direction opposite to the direction of movement. At this time, since gravity is added to the force pushed and pulled by the rod portion 35, the attached portion 16 appropriately returns to the reference position. Since the attached portion 16 always tries to stay at the reference position due to gravity, it does not unnecessarily reciprocate about the reference position. The air pressures on the rod side and head side are balanced again.

Since the attached part 16 is suspended by each lever 25, 26, 27, 28, the attached part 16 and each lever 25, 26, 27, 28 form a pair of left and right four-bar parallel links. Therefore, compared to a case where there is a pair of lever parts 24 (that is, one on each side on the left and right), the attached part 16 moves almost horizontally without being twisted.

The base portion 17 extends upward and reaches above the upper end portions of the levers 25, 26, 27, and 28 and the plate frames 22 and 23. Therefore, when the roll 11 is attached to the pedestal part 18, after lifting the one end part 12 of the roll 11 to an appropriate height, the meandering prevention device 14 is arranged below the one end part 12, and the one end part 12 is attached to the pedestal part 18. The roll 11 is attached to the pedestal part 18 by placing it on and fixing it. Therefore, attachment of the roll 11 to the pedestal portion 18 is easy.

As shown in FIG. 2, since the roll 11 is attached to the attached part 16, when the attached part 16 moves back and forth, the roll 11 also changes from the position perpendicular to the running belt 10. Change to a diagonally crossed position. When the attitude of the roll 11 changes, the running belt 10 also shifts from side to side, so that the meandering is corrected. When the attached portion 16 returns to the reference position, the roll 11 also returns to a position perpendicular to the running belt 10.

As described above, even with a rigid air cylinder, the roll 11 can be returned to its original position naturally.

Note that in another embodiment of the present invention, the pedestal portion is connected to the lower end portion of the lever portion.
In another embodiment, the lever portions are a pair of left and right levers.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments. The present invention can be modified in various ways without departing from the scope of the claims.

1 Conventional device 2 Receiving part 3 Support stand 4 Bellows 10 Running belt 11 Roll 12 One end part 13 Other end part 14 Meandering prevention device 15 Automatic guide main body part 16 Attached part 17 Base part 18 Pedestal part 19 Frame part 20 Frame stand 21 Plate frame 22 Left plate frame 23 Right plate frame 24 Lever part 25 First lever 26 Second lever 27 Third lever 28 Fourth lever 29 Handle 30 Rail part 31 Adjustment scale 32 Position scale 33 Air cylinder 34 Cylinder part 35 Rod part 36 Detection part

Claims (3)

an automatic guide main body that supports one end of a roll that guides the running belt from the back side across the width direction of the running belt;
a detection unit disposed at a widthwise edge of the running belt to detect the position of the running belt;
The automatic guide main body part is
an attached part to which the one end part is attached;
a lever part from which the attached part is hung;
a rigid cylinder connected to the attached portion in a direction along the longitudinal direction of the running belt;
The cylinder pushes and pulls the attached part in response to an output from the detection unit, so that the attached part moves from a reference position in the longitudinal direction of the running belt, or returns to the reference position by gravity. By changing the attitude of the roll,
A meandering prevention device characterized by: The attached part is
a base part connected to the lower end part of the lever part and extending upward from the upper end part of the lever part;
a pedestal part connected to the upper end part of the base part and to which the one end part is attached;
The meandering prevention device according to claim 1, characterized in that: The lever portion is
A pair of four-bar parallel links are configured by being attached to the running belt side of the attached part and to the opposite side of the running belt in the attached part.
The meandering prevention device according to claim 1 or 2, characterized in that:

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