JP4078497B2 - Sheet winding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet winding device that winds a sheet into a large diameter.
[0002]
[Prior art]
Conventionally, a slitter that slits a wide sheet into a plurality of narrow sheets and winds it around a winding shaft has been used. As shown in FIG. 3, the slitter includes a feeding roller 102 that feeds out the wide sheet 101, a cutter 104 that slits the fed wide sheet 101 into a predetermined narrow sheet 103, and a narrow slit that is slit by the cutter 104. At least two winding shafts 105 that wind the width sheet 103, a touch roller 107 that presses the winding roll 106 wound around the winding shaft 105 with a predetermined contact pressure, and a plurality of sheets through which these traveling sheets pass. The narrow sheet 103 is wound by traveling in the air for a distance to the winding shaft 105 after passing through the final guide roller 108 whose position is fixed. Is normal.
[0003]
By the way, in recent years, it has been required to wind a thin sheet having a small thickness corresponding to various uses as a large-diameter wound product for the purpose of improving productivity. For example, in a product having a winding diameter of 600 mm to 1000 mm, the distance C that the narrow sheet 103 slit by the cutter 104 travels in the air at the beginning of winding from the final guide roller 108 to the winding shaft 105 is shown in FIG. 3 at the beginning of winding as shown by a lower winding shaft 105, which is at least half as long as 300 mm to 500 mm of the final winding diameter, and at the end of winding, as shown by an upper winding roll 106 in FIG. The distance D that travels in the air from the final guide roller 108 to the take-up roll 106 is usually small, and the undulation occurs while the distance that the narrow sheet 103 travels in the air varies from C to D. There is a problem that a certain winding shape cannot be maintained due to the occurrence, and the quality deteriorates.
[0004]
In order to solve such a problem, the slitter is provided so that the winding shaft can be moved. At the beginning of winding, the slitting shaft is brought close to the final guide roller, and the air from the final guide roller to the winding roll is in the air. Good winding by using a method of shortening the distance traveled and winding the roll while keeping the distance from the final guide roller to the take-up roll almost constant as the take-up shaft moves away from the final guide roller. An apparatus that can obtain the product in the form is used. However, the method of moving the take-up shaft is not preferable because the apparatus is large and complicated and the cost is increased.
[0005]
[Problems to be solved by the invention]
In view of the above circumstances, the present invention is an inexpensive sheet winding apparatus with a simple structure capable of winding a sheet with a good winding shape without causing meandering of the sheet or displacement of the end surface even when the sheet is wound in a large diameter. The purpose is to provide.
[0006]
[Means for Solving the Problems]
As a means for technically solving the above problems, the present invention provides a sheet winding device for winding a sheet into a large diameter, a pair of obtuse angled bifurcated arms, a touch roller attached to the tip of the bifurcated arm, and a bifurcated A pair of bifurcated arms are pivotally supported by the machine frame on both sides so that they can rotate in the sheet running direction, and pass through the final guide roller. When the sheet travels so as to be wound on the take-up roll after contacting the touch roller via the auxiliary roller, the trajectory drawn by the auxiliary roller in the process from the start to the end of winding by the take-up roll Providing a sheet winding device that is disposed on a bifurcated arm so as to pass between a final roller and the touch roller is positioned substantially vertically above the support shaft at the start of winding. To resolve.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 is an explanatory view showing an outline of a slitter according to an embodiment of the present invention, and FIG. 2 is an explanatory view showing an outline of a sheet winding device according to an embodiment of the present invention.
[0008]
The slitter shown in FIG. 1 includes a feed roller 12 that feeds out a wide sheet 11 as a raw fabric, a cutter 14 that slits the wide sheet 11 into a plurality of narrow sheets 13, and at least two windings that wind the narrow sheets 13. A shaft 15 and a single touch roller 17 that presses the surfaces of a plurality of winding rolls 16 wound around each winding shaft 15 with a predetermined contact pressure are provided. Here, the wide sheet 11 fed from the feed roller 12 passes through the guide roller and the tension adjusting roller, is guided to the cutter 14, and is slit into a plurality of narrow sheets 13 by the cutter 14, and the slit narrow sheet 13. In order to prevent the adjacent narrow sheets 13 from interfering with each other during winding, the narrow sheets 13 are distributed to the upper and lower stages by a guide roller every other line, and each of the sorted narrow sheets 13 passes through the final guide roller 18. After that, after touching the touch roller 17 via the auxiliary roller 19, the product is wound on the winding shaft 15 provided in two upper and lower stages to form a product winding roll 16. In FIG. 1, the lower stage shows a state in which the narrow sheet 13 has started to be wound around the winding shaft 15, and the upper stage shows a state in which the narrow sheet 13 has been wound on the winding roll 16.
[0009]
In the sheet winding device 10 of the present invention, the bifurcated arm 20 is formed on a machine frame on both sides of a slitter (not shown) so that the plate extending in two directions forms an obtuse angle and the base end 21 becomes a fulcrum 22. It is attached and can be rotated in the traveling direction of the narrow sheet 13. One touch roller 17 is attached to the distal end portion 23 of the pair of bifurcated arms 20, and one auxiliary roller 19 is attached to the bifurcated portion 25.
[0010]
The base end portion 21 of the bifurcated arm 20 is pivotally supported below the winding shaft 15 so as to be rotatable about a fulcrum 22. The attachment position of the base end 21 is shown by the dotted line in FIG. 2 indicating the start of winding of the winding roll 16, and the solid roller indicating the end of winding of the winding roll 16, as shown in FIG. Is disposed so that the distance B from the final guide roller 18 to the auxiliary roller 19 is substantially equal at the start and end of winding. Is preferred. That is, since the distance A from the auxiliary roller 19 to the touch roller 17 is always constant, the fulcrum 22 is set so that the distance B from the final guide roller 18 to the auxiliary roller 19 is substantially constant at the start and end of winding. Then, the distance A + B that the narrow sheet 13 travels from the final guide roller 18 to the take-up roll 16 is always substantially constant, and there is no meandering or shift of the end face due to the travel distance change, and a product with a good winding shape is obtained. Obtainable.
[0011]
It is important that the projecting direction of the bifurcated portion 25 of the bifurcated arm 20 is arranged in the direction of the final guide roller 18. The obtuse angle indicating the obtuse angle is set in consideration of the position of the fulcrum 22 so that the distance B from the final guide roller 18 to the auxiliary roller 19 is substantially equal at the start and end of winding as described above. Is preferred. In addition, it is important that the bifurcated arm 20 does not interfere with the take-up roll 16 when the bifurcated arm 20 is tilted to carry out the take-up roll 16 after the take-up is completed. .
[0012]
Further, it is important that the fulcrum 22 is disposed so that the touch roller 17 is positioned substantially vertically above the fulcrum 22 at the start of winding. The bifurcated arm 20 is connected to the air cylinder 27 and tilted by the operation of the air cylinder 27. As the bifurcated arm 20 tilts, the signal from the touch roller contact pressure setting device is controlled by the electropneumatic converter. It is preferable to adjust the air pressure to minimize the influence of the weight on the contact pressure. That is, since the touch roller 17 is positioned substantially vertically above the fulcrum 22 at the beginning of winding, it is most preferable that the influence of weight on the contact pressure starts from zero at the beginning of winding. A design change in which the touch roller 17 is positioned vertically below the fulcrum 22 instead of being positioned vertically above the fulcrum 22 is also included in the present invention.
[0013]
Further, the bifurcated arm 20 is preferably connected to the damper 28. The configuration of the damper 28 is not particularly limited, and a known oil damper 28 or the like is used. Stable winding can be continued by absorbing eccentricity when winding is due to hard winding or soft winding, or eccentricity due to the inclusion of foreign matter such as a binder tape.
[0014]
Next, the operation of the present embodiment configured as described above will be described.
First, the raw wide sheet 11 is fed from a feed roller 12 and slit into a predetermined narrow sheet 13 by a cutter 14 through a guide roller and a tension adjusting roller. The plurality of narrow sheets 13 that have been slit are distributed in two stages, upper and lower, by a guide roller.
[0015]
As shown in the example of winding the narrow sheet 13 on the lower winding shaft 15 shown in FIG. 1, the narrow sheet 13 passes through the final guide roller 18 and then contacts the touch roller 17 via the auxiliary roller 19. Then, it is wound around the winding shaft 15 to form a winding roll 16. At this time, the travel distance from the final guide roller 18 to the take-up roll 16 is the sum A + B of the distance B from the final guide roller 18 to the auxiliary roller 19 and the distance A from the auxiliary roller 19 to the touch roller 17.
[0016]
When winding the narrow sheet 13 on the winding shaft 15, the position of the touch roller 17 is substantially vertically above the fulcrum 22 of the base end portion 21 of the bifurcated arm 20, and the touch roller 17 presses the winding roll 16. The force of gravity is set so that the influence of gravity is substantially equal to zero.
[0017]
Next, the winding roll 16 becomes thicker, and the touch roller 17 presses the winding roll 16 while gradually descending to the lower right in the drawing. Then, as seen in the state where the winding of the upper winding roll 16 shown in FIG. 1 is completed, the bifurcated arm 20 is in a direction in which the contact pressure is reduced due to gravity, but the electropneumatic converter It is preferable that the air pressure is increased and the contact pressure is controlled to be uniform from the beginning to the end of winding.
[0018]
At the end of winding, the distance that the narrow sheet 13 travels from the final guide roller 18 to the touch roller 17 is a distance B from the final guide roller 18 to the auxiliary roller 19 and a distance A from the auxiliary roller 19 to the touch roller 17. The sum A + B. Here, the distance that the narrow sheet 13 travels from the final guide roller 18 to the take-up roll 16 is always substantially constant as A + B, and there is no meandering of the sheet or deviation of the end face due to a change in the travel distance, and the winding form is good. You can get a product.
[0019]
Further, a damper 28 is connected to the bifurcated arm 20, and during the winding, the touch roller 17 is greatly vibrated due to eccentricity of the winding roll 16 due to hardness and winding of the winding, and foreign matter being caught in the winding roll 16. Suppressing and stable pressing can be performed, and a good winding roll 16 can be obtained.
[0020]
The sheet winding apparatus of the present invention is not only used for winding in the slitter shown in the embodiment, but is also preferably used for winding a wide sheet or winding it.
[0021]
【The invention's effect】
As described above, according to the sheet winding apparatus of the present invention, the diameter of the winding roll increases as the sheet is wound on the winding shaft, and the touch roller gradually moves downward from the initial position. By arranging the touch roller and the auxiliary roller so as to have the above-described configuration, the distance traveled by the sheet from the final guide roller to the take-up roll becomes substantially equal, and the sheet travels due to fluctuations in the travel distance. Can prevent troubles such as meandering and deviation of the end face, and a product with a good winding shape can be obtained. Further, in the connection air cylinder control connected to the bifurcated arm, the influence of the weight on the contact pressure of the touch roller can be minimized at the starting point of winding.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an outline of a slitter according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing an outline of a sheet winding apparatus according to an embodiment of the present invention.
FIG. 3 is an explanatory diagram showing an outline of a slitter according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Sheet winding device 11 Wide sheet 12 Feeding roller 13 Narrow sheet 14 Cutter 15 Winding shaft 16 Winding roll 17 Touch roller 18 Final guide roller 19 Auxiliary roller 20 Bifurcated arm 21 Base end portion 22 Support point 23 Tip portion 25 Bifurcated portion 27 Air cylinder 28 Damper

Claims (1)

  A sheet winding apparatus for winding a sheet to a large diameter, comprising: a pair of obtuse angled bifurcated arms; a touch roller attached to the tip of the bifurcated arm; and an auxiliary roller attached to the bifurcated part of the bifurcated arm; The bifurcated arm is pivotally supported by the machine frame on both sides so that the base end can be pivoted in the sheet traveling direction, and the sheet that has passed through the final guide roller comes into contact with the touch roller via the auxiliary roller, and then is wound. When traveling around the take-up roll, the trajectory drawn by the auxiliary roller is arranged on the bifurcated arm so that the trajectory drawn by the auxiliary roller passes between the support shaft and the final roller in the process from the start to the end of winding by the take-up roll. And the touch roller is positioned substantially vertically above the support shaft at the start of winding.

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