JP2546206Y2 - Web take-up device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper (web) winding device generally used in a paper mill or the like.

[0002]

2. Description of the Related Art A conventional web take-up device (hereinafter referred to as a winder) will be described with reference to FIG. 2. A web a (hereinafter simply referred to as paper) unwound from a rewind roll 4 on a web rewind device 1 is: The running direction is controlled by a paper roll 5, and the width direction is continuously cut to a desired size by rotating blades 6 arranged above and below, while a winding roll 11 is wound on a paper tube 10 on winder drums 7 and 8. Winded up. When the take-up roll 11 having the required length is finished, the entire winder is stopped, the rider roll 12 is suspended above the take-up roll 11, the paper holding roll 17 is raised, and the paper a is placed on the surface of the winder drum 7. Press Next, the roll push-out bar 9 rotates around the bearing of the winder drum 7, and the winding roll 1 is placed on the winder decks 13 and 14.
Extrude 1.

Prior to the extrusion of the take-up roll 11, a brake acts on the rewind roll 4 to regulate the feeding of the paper a, so that the take-up roll 11 is placed on the winder deck 13 made of a steel plate as shown in FIG. In the process of transferring to the winding roll 11, the winder drum 8 rotates in the
From the paper cutting knife 18 to an appropriate amount of tension.

The tension can be controlled to an appropriate amount by adjusting the braking force applied to the winder drum 8. For example, if the braking force applied to the winder drum 8 is made extremely large, the rotation of the winder drum 8 stops, so that the winding roll 11 tries to rotate clockwise in FIG. ,
Excessive tension is generated on the paper reaching the paper cutting knife 18. On the contrary, if the braking force applied to the winder drum 8 is very small, the winding roll 11 rotates counterclockwise when passing over the winder drum 8. To slightly reduce the tension generated on the paper reaching the paper cutting knife 18 or cause slack.

When the extruded take-up roll reaches the cradle 15 shown in FIG. 2, the paper end of the take-up roll 11 cut by the paper cutting knife 18 under excessive tension as shown in FIG. Large "shift" between slit rolls
Is awake. In addition, under a small tension, paper cutting knife 1
8 causes a problem that the paper cannot be cut.

When the take-up roll 11 passes over the winder drum 8, the above-described adjustment of the braking force applied to the winder drum 8 causes a gap between the take-up roll 11 and the paper cutting knife 18 required for paper cutting. Although no problem occurs because the paper tension can be adjusted to an appropriate amount, when the winding roll 11 reaches the winder deck 13 where the winding roll 11 does not rotate as shown in FIG. In a winder having a small diameter of a winder drum which forms a positional relationship suitable for paper cutting as described above, the paper tension required for cutting is maintained at an appropriate amount by adjusting the braking force applied to the winder drum 8 as described above. I can't do that.

That is, the take-up roll 11 being extruded on the winder deck 13 generates an excessive paper tension while trying to rotate clockwise in FIG. 3, and reaches the cradle 15 in FIG. 2 as described above. As shown in FIG. 4, a large "shift" occurs at the end of the cut sheet of the winding roll. The occurrence of the "shift" causes a sudden change in the state in which the paper tension existing immediately before the cutting disappears at the moment of cutting, and this change is caused by the rotation of the rotary blade 6.
This causes different energy to be applied to the rolls for each slit of the winding roll 11 which has been slit in advance and has different lengths in the width direction. The take-up roll 11 that is given different energy in this way and rolls out toward the cradle 15 from the moment of cutting causes “displacement” of the cut paper edge when stopped on the cradle 15. It has been empirically confirmed that the larger the paper tension immediately before cutting, the larger the amount of "displacement".

The "displacement" of the end of the cut sheet shown in FIG. 4 is not a problem when the end of the cut sheet is manually adhered to a take-up roll using an adhesive tape or the like, but the width is 60 m.
When a single-sided adhesive kraft tape of m to 80 mm is run in a straight line in the width direction of the take-up roll 11 to automatically cover and bond the cut paper end by a machine, a large problem may occur. That is, when the “shift” amount is larger than the width of the adhesive tape, an unadhesive portion occurs. Ideally this "shift"
Although it is desirable that the amount of occurrence of the edge is zero, the cutting in the state shown in FIG. 3 often causes a problem that the amount of “displacement” at the end of the cut sheet is larger than the width of the adhesive tape.

Furthermore, in a winder for a liner board made of thick paper, a take-up roll is extruded from a winder drum every few minutes, and the paper end on the take-up roll is coated and adhered over the entire width with a single-sided kraft adhesive tape. Need that. Performing such a busy bonding operation manually is not preferable in terms of labor, and for this reason, automation by a machine has been promoted. However, in order to achieve automatic tape application, it is necessary that the irregular amount of the cut end portion of the take-up roll paper is within about half the width of the adhesive tape used in the tape application section.

[0010]

Therefore, the present invention reduces the coefficient of friction of the take-up roll supporting surface of the winder deck so as to minimize irregularities occurring at the paper end of the take-up roll cut in the state shown in FIG. It is an object of the present invention to enable automatic mechanical bonding using at least a single-sided kraft tape having a width of 60 mm to 80 mm which is generally used for bonding a paper end of a liner board take-up roll. It is another object of the present invention to reduce the paper tension generated between the paper cutting knife 18 and the take-up roll 11 during paper cutting in the state shown in FIG.

[0011]

According to the present invention, there is provided a rewinding machine.
The web is taken up as a take-up roll
During rewinding, the rotating blades arranged above and below
A pair of wind ladder while being cut to the desired width
In a web take-up device wound on a winding roll, a low friction coefficient rotating roll is provided on a winding roll exit side on a winder deck arranged close to a winder drum supporting a winding roll .
The roll is provided with a take-up roll support which is not a roll , and this is used as a means for solving the problem.

[0012]

The low friction material is fixed on the winder deck using commercially available standard bolts or a suitable adhesive. By fixing the low friction material on the winder deck, the sliding resistance between the take-up roll and the winder deck surface is reduced, the sliding action is promoted, the rotation of the take-up roll is facilitated, and the paper tension is reduced. it can.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In the figure, 7 and 8 are winder drums, 9 is a roll extrusion bar, 11 is a take-up roll, 13 is a winder deck,
Reference numeral 17 denotes a paper holding roll, and reference numeral 18 denotes a paper cutting knife. These have the same configuration as that of the conventional apparatus, and therefore, detailed description thereof is omitted here.

As shown in FIG. 1, a Teflon-based low friction material 20 is fixed to the upper surface of the winder deck 13 by a suitable means such as a bolt or an adhesive. This means that the take-up roll 11 supported by the winder deck 13 made of steel plate shown in FIGS. 2 and 3 is applied with a low tension such as 220 g / m ^{2 in} a range where the paper is not broken in FIGS. 2 and 3. In the case of a liner board having a grammage, the support is provided so as to be rotatable counterclockwise with a tension of about 0.5 to 1.2 kg / cm. By covering the upper surface of the winder deck 13 with the low friction material in this way, the rotation of the take-up roll on the winder deck 13 is performed under a low paper tension, and the irregular amount of the paper edge cut portion is reduced. can do.

In the above embodiment, the use of Teflon has been described. However, lowering the friction coefficient of the winder deck surface has a lower friction coefficient than the friction coefficient of the surface of a steel plate having a smooth surface finish. Materials,
This can be realized by processing and finishing a smooth surface as needed, and there are various methods. For example, a molybdenum sprayed surface having a friction coefficient clearly lower than that of a normal steel plate, a surface polished after ceramic spraying, and the like are also effective for implementation.

[0016]

As described in detail above, according to the present invention, irregularities occurring at the paper end of the take-up roll can be reduced, and the paper end of the take-up roll can be automatically bonded. Further, the irregularities occurring at the end of the take-up roll paper can be easily eliminated without largely changing the conventional winder deck, so that the present invention can be realized with high practicality and at low cost equipment cost. It is also conceivable to install a rotating roll instead of the winder deck, but the finishing width is 3500 mm.
In such a winder, a large roll diameter is required in terms of strength, and it is difficult to realize this in a space substantially equal to that of a conventional winder deck. However, according to the present invention, it is possible to realize the winder with almost the same configuration as that of the related art, and to achieve excellent effects such as requiring no special space.

[Brief description of the drawings]

FIG. 1 is a side view of a winder drum unit of a web winding device according to an embodiment of the present invention.

FIG. 2 is a side view of the entire web winding device.

FIG. 3 is a side view of a conventional web winding device winder drum unit.

FIG. 4 is an explanatory diagram of irregularities in winding roll paper edges.

[Explanation of symbols]

 7 Winder Drum 8 Winder Drum 9 Roll Extrusion Bar 11 Winding Roll 13 Winder Deck 20 Low Friction Material

Claims (1)

(57) [Scope of request for utility model registration] The web is wound by being rewound from a rewind roll.
Arranged up and down during rewinding as a take-up roll
While the width direction is cut to the desired dimensions by the
To a web winding device that is wound on a pair of winder drums
In the winding roll exit side on the winder deck which is arranged close to the winder drum supporting the winding roll,
A web take-up device comprising a take-up roll support that is not a rotating roll having a low coefficient of friction.