JP7195680B1 - meandering prevention device - Google Patents

Abstract

A meandering prevention device capable of returning a roll to its original posture even with a rigid cylinder such as an air cylinder is provided.
A meandering prevention device (14) has a mounted portion (16) suspended by a lever portion (24) connected to a frame portion (19), and a roll for guiding a running belt is mounted on a base portion (18) of the mounted portion (16). . An air cylinder 33 is connected to the mounting portion 16, and when the mounting portion 16 is moved back and forth by the rod portion 35 and the air is released from the air cylinder 33, the mounting portion 16 is supported by its own weight and the weight of the roll. naturally return to the reference position and stop.
[Selection drawing] Fig. 3

Description

TECHNICAL FIELD The present invention relates to a meandering prevention device for correcting meandering of a running belt by controlling the position of rolls that guide the running belt.

2. Description of the Related Art Conventionally, for example, a running belt such as a wire or felt of a paper machine used in a papermaking 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 the "publicly known document 1 invention") includes a positioning device attached to the shaft of a roll and a palm for detecting meandering of the running belt by coming into contact with the running belt. It consists 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 by operating the positioning device, so the roll is perpendicular to the running belt. From the posture, it changes to a diagonally crossed posture. When the posture of the roll changes, the running belt also shifts in the width direction, so that meandering is corrected.

The positioning device of the document 1 invention is a so-called bellows type. In the bellows type, the attitude of the roll is changed by adjusting the air pressure by letting air flow into a bellows-shaped expansion tube.

Here, an example of a conventional bellows type device will be described with reference to the drawings. FIG. 1 shows the structure of a conventional bellows type device. FIG. 1 is a state in which a conventional device 1 is attached to the end of a roll (not shown), and the conventional device 1 is viewed from the outside of the running line in the axial direction of the roll. As shown in FIG. 1, a receiving part 2 to which the ends of the roll are attached is connected to a support base 3, and rubber bellows 4 are connected to both ends of the receiving part 2. As shown in FIG. The receiving part 2 moves left and right about the support base 3 side, and the air pressure applied through the bellows 4 is adjusted to tilt left or right to change the roll attitude. After the meandering of the running belt is corrected, it is necessary to return the position of the receiving part 2 to the center in order to return the roll to its original posture. For example, when the receiving portion 2 falls to the right ( FIG. 1 , lower diagram), the bellows 4 on the right side is pushed and compressed by the receiving portion 2 and expands in outer diameter. growing. Therefore, when the bellows 4 is extended again to its original state, the receiving part 2 is pushed to the left and returns to its original position, so that it is always centered.

By the way, in recent years, in order to expand the production capacity of machines, there is a demand for speeding up dehydration and drying in the papermaking process. As described above, the bellows used in the invention of Document 1 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 used.

JP-A-11-229287

However, unlike the bellows type described above, the air cylinder does not expand the pressure-receiving area due to compression and does not cause the reaction force that accompanies it. An external force is required to return it. In addition, once the receiving part begins to fall, the gravity acting on the roll and the receiving part tends to cause the receiving part to fall to its limit. necessary. Even if the receiving part can be returned to its original central position, if the external force for returning is too strong, the receiving part will pass the central position and fall in the opposite direction. Stilling is even more difficult.

The present invention has been proposed in view of such circumstances. SUMMARY OF THE INVENTION It is an object of the present invention to provide a meandering prevention device capable of easily returning a roll to its original posture even with a rigid cylinder such as an air cylinder.

In order to achieve the above object, a meandering prevention device according to the present invention includes an automatic guide main body supporting 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 portion arranged at an edge in the width direction to detect the position of the running belt, wherein the automatic guide main body portion includes a mounting portion to which the one end portion is mounted, and a mounting portion suspended from the mounting portion. A lever portion and a rigid cylinder connected to the attached portion in a direction along the longitudinal direction of the running belt, wherein the cylinder pushes the attached portion according to an output from the detection portion. By pulling, the attached portion moves from the 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.

The meandering prevention device according to the present invention includes: a base portion in which the attached portion is connected to the lower end portion of the lever portion and extends upward from the 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 portion is attached to the mounting portion on the side of the running belt and on the side of the mounting portion opposite to the running belt, thereby forming a pair of four-bar parallel links. is configured.

The meandering prevention device according to the present invention includes an automatic guide main body portion 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 running belt that is arranged at the edge in the width direction of the running belt. The automatic guide main body includes an attached portion to which one end is attached, a lever portion that suspends the attached portion, and a cover in a direction along the longitudinal direction of the running belt. and a rigid cylinder connected to the mounting portion, and the cylinder pushes and pulls the mounted portion according to the output from the detection portion, thereby moving the mounted portion from the reference position in the longitudinal direction of the running belt, Alternatively, the posture of the roll is changed by returning to the reference position due to gravity. That is, since the attached portion on which one end portion of the roll is supported is suspended by the lever portion, it is in a pendulum-like state suspended from the fulcrum. Unless an external force greater than the weight of the roll or its own weight is applied from the cylinder, the mounted part will stop directly under the fulcrum due to the action of gravity, so it will always be in the reference position and the roll will also be constant. I keep my posture. Even when the mounting part is pushed by the cylinder and moves from the reference position, gravity acts on the mounting part in the direction opposite to the direction in which it was pushed by the cylinder. never move to. Even when the mounted portion returns to the reference position, gravity is added to the force of the cylinder pushing toward the reference position, and the mounted portion returns to the reference position. Since the attached portion always tries to stay at the reference position due to gravity, it does not reciprocate unnecessarily around the reference position. Therefore, even with a rigid cylinder using air or the like as a medium, the attached portion can be appropriately returned to the reference position, and the roll can be easily returned to its original posture.

In the meandering prevention device according to the present invention, the mounted portion is connected to the lower end portion of the lever portion and extends upward from the upper end portion of the lever portion, and the base portion is connected to the upper end portion of the base portion. and a pedestal to which one end is attached. This configuration facilitates attachment of 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 one end is placed on the pedestal and fixed, so that the roll is attached to the pedestal. . If the roll is attached to the lower end of the lever, the height for lifting the roll must be adjusted to the lower end of the lever, and the height required to suspend the roll will increase the size of the device.

In the meandering prevention device according to the present invention, a pair of four-bar parallel links is configured by attaching the lever portion to the running belt side of the attached portion and to the opposite side of the attached portion to the running belt. . Therefore, the attached portion moves substantially horizontally. If there is only one lever, the track of the mounted part forms a semi-circular arc with respect to the fulcrum, so vertical movement may be applied to the mounted part and the mounted part may be twisted. .

FIG. 1 is a schematic illustration of a conventional bellows-type device. FIG. 2 is a schematic plan view showing the use state of the meandering prevention device according to the embodiment of the present invention. 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 how the meandering prevention device according to the embodiment of the present invention operates.

An embodiment of a meandering prevention device according to the present invention will be described below with reference to the drawings. FIG. 2 schematically shows a usage state of the meandering prevention device 14 according to the present embodiment, and shows a plan view of a running line on which the running belt 10 is used. Hereinafter, as shown in FIG. 2, the longitudinal direction of the running belt 10 is defined as front and rear (Front, Back), and the width direction of the running belt 10 is defined as right and left (Right, Left).

As shown in FIG. 2, a long running belt 10 is wound around a plurality of rolls 11 in 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 of the running belt 10 . One end 12 of the roll 11 is supported by the meandering prevention device 14 and moves via the meandering prevention device 14, but the other end 13 does not move. The meandering prevention device 14 has an automatic guide main body 15 supporting one end 12 of the roll 11 and a detector 36 arranged at the right edge of the running belt 10 . The automatic guide body portion 15 has an attached portion 16 to which the one end portion 12 is attached, and an air cylinder 33 connected to the attached portion 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) to which the palm is connected, and detects the position of the running belt 10 .

When the running belt 10 meanders and shifts in the left-right direction while the vehicle is running, the palm is pushed and the displacement amount of the palm is detected by the detector main 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 the 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 that crosses the running belt 10 obliquely. When the posture of the roll 11 changes, the running belt 10 also shifts to the left and right, so meandering is corrected.

Next, the meandering prevention device 14 will be described in detail with reference to the drawings. 3 to 5 show the automatic guide body 15 of the meandering prevention device 14. As shown in FIG.

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

The plate-shaped frame 21 is composed of a left plate-shaped frame 22 on the side where the running belt 10 is located, and a right plate-shaped frame 23 on the side opposite to the running belt 10 with respect to the mounting portion 16. Each plate-shaped frame 22 and 23 face each other. Each of the plate-like frames 22 and 23 is internally connected to the mounted portion 16 through a lever portion 24, and an air cylinder 33 is mounted to the rear end thereof. The lever portion 24 has an elongated 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. 22 is connected to the upper inner surface. 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 portion 16 has a base portion 17 connected to the lower end portions of the respective levers 25 , 26 , 27 , 28 and a base portion 18 connected to the upper end portion of the base portion 17 . The base portion 17 extends upward and reaches above the upper ends of the levers 25 , 26 , 27 , 28 and the plate-shaped frames 22 , 23 . The pedestal 18 has a flat plate shape and is arranged above the plate-shaped frames 22 and 23 . One end portion 12 of the roll 11 is attached to the pedestal portion 18 (see FIG. 2).

The left side of the mounting portion 16 on the running belt 10 side is suspended by a third lever 27 and a fourth lever 28, and the right side on the opposite side of the running belt 10 is suspended by a first lever 25 and a second lever 26. By being lowered, the attached portion 16 and the respective levers 25, 26, 27, 28 constitute a pair of left and right four-bar parallel links. Therefore, the mounted portion 16 is suspended by the respective levers 25, 26, 27, 28, and hangs down from the connecting points of the upper ends of the respective levers 25, 26, 27, 28 and the mounted portion 16 as fulcrums. It is possible to move forward and backward in such a state.

Since the air cylinder 33 is a metal double-acting piston cylinder and is a rigid body, the cylinder portion 34 does not compress or expand in outer diameter like rubber 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 portion 35 advances by the air, the base portion 17 is pushed from behind and moves forward, and when the rod portion 35 retreats, the base portion 17 is pulled rearward and moves rearward. A packing (not shown) incorporated in the air cylinder 33 is heat resistant and contains fluorine.

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

As shown in FIGS. 3 and 6, the attached portion 16 is pushed and pulled by the air cylinder 33 to move forward and backward. Further, when the external force from the air cylinder 33 is not applied, the attached portion 16 is stationary at the reference position due to the action of gravity. More specifically, in the air cylinder 33, when the air pressure on the rod side and the head side are the same and balanced, and the external force by the air cylinder 33 is smaller than the gravity and does not act on the mounting portion 16, as shown in FIG. As shown, each lever 25, 26, 27, 28 is in a posture extending straight downward from the fulcrum, and the attached portion 16 is its own weight or the weight of the roll 11 attached to the pedestal portion 18. It stays still 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 portion 35 advances, as shown in FIG. Pushed by the rod portion 35, the attached portion 16 moves substantially horizontally forward from the reference position around the fulcrum. Similarly, when the rod-side air increases (or the head-side air decreases) and the rod portion 35 retreats, the base portion 17 of the attached portion 16 is pulled by the rod portion 35, and the attached portion 16 moves approximately horizontally rearward from the reference position with the fulcrum as an axis. Even when the attached portion 16 moves back and forth, gravity acts on the attached portion 16 in a direction opposite to the direction in which the rod portion 35 is pushed and pulled. Do not move excessively. On the other hand, after the attached portion 16 moves back and forth from the reference position, the attached portion 16 is pushed and pulled by the rod portion 35 in the direction opposite to the moving direction. 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 reciprocate unnecessarily around the reference position. The air pressure on the rod side and head side is rebalanced.

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

The base portion 17 extends upward and reaches above the upper ends of the levers 25 , 26 , 27 , 28 and the plate-shaped frames 22 , 23 . Therefore, when the roll 11 is attached to the pedestal portion 18 , the one end portion 12 of the roll 11 is lifted up to an appropriate height, and then the meandering prevention device 14 is arranged below the one end portion 12 so that the one end portion 12 is attached to the pedestal portion 18 . The roll 11 is attached to the pedestal portion 18 by placing it on and fixing it. Therefore, it is easy to attach the roll 11 to the base portion 18 .

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

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

It should be noted that in another embodiment according to the present invention, the base 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.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments. Various design changes can be made to the present invention without departing from the scope of the claims.

1 Conventional device 2 Receiving part 3 Support base 4 Bellows 10 Running belt 11 Roll 12 One end part 13 Other end part 14 Meandering prevention device 15 Automatic guide 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 that is arranged at an edge in the width direction of the running belt and detects the position of the running belt;
The automatic guide main body is
an attached portion to which the one end is attached;
a lever portion that suspends the attached portion;
a rigid cylinder connected to the mounting portion in a direction along the longitudinal direction of the running belt;
The cylinder pushes and pulls the attached portion according to the output from the detection portion, so that the attached portion moves from the reference position in the longitudinal direction of the running belt, or returns to the reference position due to gravity. By changing the posture of the roll,
A meandering prevention device characterized by: The attached portion is
a base portion connected to the lower end portion of the lever portion and extending upward from the upper end portion of the lever portion;
a pedestal portion connected to the upper end portion of the base portion and to which the one end portion is attached;
The meandering prevention device according to claim 1, characterized in that: The lever portion
A pair of four-bar parallel links are configured by being attached to the running belt side of the attached portion and to the opposite side of the attached portion to the running belt,
The meandering prevention device according to claim 1 or 2, characterized in that:

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