JPH07101604A - Web winding device - Google Patents

Abstract

PURPOSE:To completely wind up a web around a core by blowing-off compressed air from a guide roll, thereby pressing the cut-off web against the core. CONSTITUTION:A web W supplied through a first pressing-down roll 26 is guided to a guide roll 50 through the outer peripheral surface of a core 18, then guided to the side of a winding core 20 through supply rolles 40, 22, and is wound up into the shape of a roll. At this time, the web W is pressed against the lower part of the core 18 by means of a second pressing-down roll 36. Then, when a roll paper sheet is fully wound up around the winding core 20, a cutter 42 is moved along the axial direction of the core 18 to blow-off compressed air from an air blow-off hole of the guide roll 50. Thus, the web w cut-off by the cutter 42 and having lost its tensile strength is wound on the peripheral surface of the core 18, with the compressed air blown-off, and after that, the web W is wound up around the core 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web winding device.

[0002]

2. Description of the Related Art Conventionally, when a web such as an audio cassette, a professional video, a home video, a photographic film, a plastic film or a web of paper is wound, coated, cured, etc. Without stopping the feeding of the web, the web is wound around a full core (hereinafter referred to as a fully wound core) to a core in which no web is wound (hereinafter referred to as an empty core), and the winding is performed. A web winding device capable of continuing the winding has been proposed (Japanese Patent Application No. 3-288916, etc.).

The structure of the winding device 10 for the web W will be described with reference to FIG.

Reference numeral 12 is a cross-shaped turntable, which is rotatably provided on a machine base 16 by a rotation fulcrum 14. The turntable 12 is rotated by 180 ° around the rotation fulcrum 14 by a turning motor (not shown). A pair of arm members 12a and 12b project from the lateral direction of the turntable. The right side of the turntable 12 is a winding position for winding the web W, and the left side is a preliminary position.

Reference numerals 18 and 20 denote cores of a cylindrical web W provided rotatably on the pair of arm members 12a and 12b of the turntable 12, respectively. And this core 18, 20
Is rotated clockwise at a high speed by a motor (not shown).
In FIG. 4, the core attached to the right arm member 12a is an empty core, and the core attached to the left arm member 12b is the fully wound core 20.

Reference numeral 22 is a web W supply roll provided on each of the upper and lower portions of the turntable 12. These guide the web W from the arm member 12a to the arm member 12b, or from the arm member 12b to the arm member 12a.

Reference numeral 24 denotes a web W for preventing the slack of the web W wound around the cores 18 and 20, respectively.
The touch roll 24 presses the surface of the.

Reference numeral 26 is a first pressing roll for guiding the web W to the core 18, and is provided at the tip of the first supporting arm 28. The first support arm 28 is rotatable about a fulcrum 30, and approaches the core 18 only when the web W is guided to the core 18 to move the first presser roll 26 to the core 1.
8 surface.

Reference numeral 32 is a second support arm that rotates about a fulcrum 34. The second support arm 32 has a second press roll 36, a support roll 38, and a supply roll 40 at its tip. The second support arm 32 also has a web W on the core 18.
It rotates only when guiding the second presser roll 36,
The support roll 38 and the supply roll 40 are brought close to each other from below the core 18.

Reference numeral 42 is a cutter that moves along the axial direction of the core 18. The cutter 42 cuts the traveling web W in the width direction by the movement thereof.

The operation state of the winding device 10 having the above structure will be described.

When the core 20 is fully wound with the web W at the winding position on the right side of the turntable 12, the turntable 12 is rotated clockwise by 180 ° about the rotation fulcrum 14 to move the lead 20 to the preliminary position. To move. At the same time, the empty core 18 moves from the preliminary position on the left side of the turntable 12 to the winding position. In this state, the web W has the core 18 and the lower supply roll 2
It is running on the core 20 via 2.

The first support arm 28 and the second support arm 32 are brought close to the core 18.

The first press roll 26 cores the web W onto the core 1
The second pressing roll 36 presses the web W against the lower surface of the core 18 while pressing the web W onto the surface of the core 8. In this state, the web W has the first presser roll 26, the core 18, and the support roll 3
8, through the supply roll 40 and the supply roll 22 and travels to the core 20.

The cutter 42 is moved in the width direction of the web W to cut the web W between the support roll 38 and the core 18 in the width direction.

The tip of the cut end of the cut web W moves along the core 18 rotating clockwise and is wound around the first press roll 26. As a result, the web W has a core 1
It is wrapped around 8.

As a result, the web W can be wound around the empty core 18 from the fully wound core 20 while the web W is running.

[0018]

The winding device 1 having the above structure.
At 0, the cutter W cuts the web W in the width direction, and the cut end of the web W becomes unstable by the time the web W is wound around the core 18. Therefore, when wound around the core 18, folding or slackening occurs. Further, when the web W is a thick and hard material, the restoring force is so strong that the web W may not be wound along the core 18 and may not be wound around the first press roll 26.

In view of the above problems, the present invention provides a winding device capable of completely winding a web around a core.

[0020]

SUMMARY OF THE INVENTION A winding device of the present invention moves a fully wound core wound with a web from a winding position to a preliminary position, and an empty empty core not wound with a web from the preliminary position. Is moved to the winding position, the web is supplied to the full core through the empty core, the web is cut between the empty core and the full core, and the web is moved to the empty core. In the winding device for continuing the winding of the guide, the guide is arranged in the vicinity of the empty core and along the axial direction of the empty core, and guides the web from the empty core to the fully wound core. Rolls, air supply means for supplying air to the guide rolls, a plurality of air blowout holes provided on the peripheral surface of the guide rolls for blowing out the air supplied from the air supply means, and the empty core By being arranged between the guide roll and moving along the axial direction of the empty core, In which the more the cutting means for cutting the web in the width direction.

[0021]

[Operation] The operation state of the web winding device having the above structure will be described.

The web W guided to the empty core is supplied to the fully wound core through the empty core and the guide roll.

In this state, the air supply means supplies the air to the guide roll and blows out the air from the air blowing hole. Also,
The cutting means cuts the web W along the width direction of the web W. In this case, the air blowing hole is pressed against the web W, but the air blowing hole is exposed from the portion of the web W cut by the cutting means and blows air. The blown air pushes up the cut web W and presses it against the empty core. Then, when the cutter gradually cuts the web W, the air blown from the air outlet along with it presses the cut web W against the empty core, and the finally cut web W is all wound on the empty core. To be

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same reference numerals are used for the same members as those of the conventional winding device.

The feature of this embodiment is that, instead of the support roll 38, the guide roll 5 blows air from the peripheral surface.
There is a point where 0 is set. The structure of the guide roll 50 will be described below.

The guide roll 50 is composed of an outer cylinder 52 and an inner cylinder 54, and a plurality of air blowing holes 56 and 58 are provided on the respective surfaces. The inner cylinder 54 is fixed to the second support arm 32, and the outer cylinder 52 is rotatable with respect to the inner cylinder 54 via a bearing 60.

Compressed air is supplied to the inner cylinder 54 from an accumulation tank (not shown) via a hose 62. The compressed air passes through the air blowout holes 58 of the inner cylinder 54 and blows out from the air blowout holes 56 provided on the peripheral surface of the outer cylinder 52.

An air guide plate 64 is provided in an arc shape on the lower peripheral surface of the guide roll 50. This guides the air blown from the entire circumferential surface of the guide roll 50 only to the surface on which the web W travels.

The operating state of the winding device 10 of this embodiment will be described.

The web W supplied from the first press roll 26 is guided to the guide roll 50 through the right peripheral surface and the lower peripheral surface of the core 18. The web W guided to the guide roll 50 is guided to the supply roll 22 via the supply roll 40. The web W is pressed by the second pressing roll 36 at the lower portion of the core 18.

From the state, the cutter 42 is moved along the axial direction of the core 18, and the compressed air is blown out from the air blowing hole 50 of the guide roll 50. In this case, all the blown air flows to the traveling web W by the air guide plate 64. However, the air blowing hole 56 is blocked by the traveling web W.

When the cutter 42 starts cutting from the end portion of the web W, the cut portion loses tension and is blown up by compressed air (see FIG. 2). for that reason,
The cut web W1 on the core 18 side is wound around the peripheral surface of the core 18. When the cutter 42 gradually cuts along the width direction of the web W, the cut web W is wound around the peripheral surface of the core 18 by the air blowing holes. That is, only the portion W1 cut by the cutter 42 has the air blow-out hole 5
6 is exposed and blows out air.

When the web W is completely cut, the first
One end of the web W is wound around the press roll 26, and the web W is completely wound around the core 18.

As described above, in the winding device 10 of the present embodiment, the cut web W is pressed against the core 18 by blowing out the compressed air from the guide roll 50, whereby the core 18 is completely removed. Wrapped around.

[0035]

As described above, in the web winding device of the present invention, the web cut by the cutting means is pressed against the peripheral surface of the empty core by blowing air from the guide roll, and the winding is performed. To be complete.

[Brief description of drawings]

FIG. 1 is a side view of a winding device showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of the winding device.

FIG. 3 is a vertical sectional view of a guide roll.

FIG. 4 is a side view of a conventional winding device.

[Explanation of reference numerals] 10: winding device 18: empty core 20: fully wound core 42: cutter 50: guide roll 56: air outlet hole

Claims (1)

[Claims] 1. A fully wound core wound with a web is moved from a winding position to a preliminary position, and an empty core not wound with a web is moved from the preliminary position to a winding position, and the empty core is passed through the empty core. A web is supplied to the full core, the web is cut between the empty core and the full core, and the web is continuously wound on the empty core. A guide roll arranged near the core and along the axial direction of the empty core, for guiding the web from the empty core to the fully wound core, and air supply means for supplying air to the guide roll. A plurality of air blowout holes provided on the peripheral surface of the guide roll for blowing out the air supplied from the air supply means, and the empty lead arranged between the empty lead and the guide roll. Cutting means for cutting the web in the width direction by moving along the axial direction of A web winding device comprising: