JPH0940240A - Method and device for re-winding sheet onto new winding drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably and surely perform cutting of a sheet through the winding of a string and winding of the string onto a new winding drum by preliminarily forming a stitch-like partial cutting part in the sheet along the cross direction of the sheet, and synchronizing the partial cutting part with the track of winding on the new winding drum which is provided by the string. SOLUTION: When the end of a partial rupturing part 11 formed in a sheet 1 by a stitch-like rupturing part formation means C has reached a new winding drum 4, the rotation of the winding drum 4 and the spiral winding of a string 7 onto the winding drum 4 are started, and it is important that the string 7 be wound along the partial rupturing part 11 of the sheet 1, this purpose being achieved by synchronizing the partial rupturing part 11 with the string 7. In order to achieve the purpose, they should be synchronized in accordance with the travel speed of the sheet 1, the distance from the rupturing part formation means C to the new winding drum 4, the distance from a string guide 6 to the new winding drum 4, the moving speed of the string guide 6, the time required for the new winding drum 4 to fall onto a reel drum 1, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when a sheet material such as a web is wound on a winding drum which is driven by being pressed by a reel drum, the winding on the winding drum is completed. In this case, the present invention relates to a winding method and apparatus for switching the full winding drum to a new winding drum without stopping the traveling of the sheet-like material.

[0002]

2. Description of the Related Art A web friction device of a surface friction drive type called a pop reel is used, and a sheet-like material such as a web guided by a reel drum is pressed onto a winding drum which is driven by the reel drum. When winding, and when the winding progresses to a full state, it is necessary to switch the winding from the full winding drum to a new winding drum. It is necessary to stably and reliably cut the sheet-like material that is being wound on the take-up drum and to stably and reliably wind the tip end of the cut end onto the new take-up drum. And, as a simple and clever means for cutting such a sheet-like material and winding it around a new winding drum,
It is well known that the method of winding a thread-like material is used, in which the material is spirally wound while being pressed against the new winding drum from below the sheet-shaped material, and the sheet-shaped material is spirally cut and wound. Has been. (See JP-A-61-282246)

The cutting means using the string-like thread means that the thread-like thread is fixed (fixed) to the winding drum through a guide which moves along the new winding drum near the new winding drum. ) Side, it passes through the lower side of the sheet-like material being wound up and passes through to the other end side, and its tip is tied and fixed to one end side of the new winding drum, and in this state, the new winding drum is reeled. By pressing the drum to start rotation and running the guide through the string-like material from one end side to the other end side of the winding drum, the string-like material with the tip end fixed is spirally wound on the new winding drum. By winding the string-like material, the sheet-like material is cut from the width direction in a state of being wound around the new winding drum. This cutting and the new winding drum Can be wound around and wound up at the same time Than it is.

By the way, the means for using this thread-like material is
As a matter of course, it is necessary that the sheet-shaped material has a characteristic that it can be easily cut with the string-shaped material.

However, when the sheet-shaped material is, for example, a melt-blown nonwoven fabric made of polyurethane, the breaking strength is not high, but the breaking elongation is large, and stable cutting cannot be performed with the string-shaped material. Furthermore, in the melt-blown non-woven fabric, for example, when a normal dry process non-woven fabric made of polyester or a spun-bonded non-woven fabric made of polypropylene is laminated and point-heat bonded to form a laminated sheet, the elongation is slightly lowered, but the strength is higher. Even if the thread is cut with the thread-like material, the sheet-like material will not be cut and will be misaligned in one direction on the winding drum to cause an overlapped winding state, so that stable and reliable I can't hope for a severe disconnection.

It is also conceivable to shear or press cut the laminated sheet material, but the melt blown nonwoven fabric constituting the sheet material has a large surface frictional resistance and is extremely non-slip, and is laminated. As a sheet-like material, it is a flat sheet-like material, and even if it can be cut, the free end of the cut portion of the sheet-like material can be easily and without disturbing the new winding drum. And it is not easy to guide and wind it stably. Further, the cutting of the sheet-like material, especially the shear cutting, does not affect the cutting blade when it is a melt-blown non-woven fabric or a sheet-like material of a firm, fluffy, or soft material. Stable cutting cannot be expected because stable biting occurs or the cutting point is not fixed.

[0007]

Therefore, the present invention is particularly effective when a sheet-like material having the above-mentioned cutting elongation and strength and a high surface friction resistance and a firmness is used as an object. The purpose of the present invention is to provide a winding method capable of easily and stably switching when the pipe is full.Furthermore, the facility is simple and stable and reliable performance can be secured, and the performance can be maintained for a long time. It is intended to provide a winding device that is easy to maintain.

[0008]

Means for Solving the Problems The present inventors have made intensive studies to overcome the above-mentioned problems, and as a result, have reached the present invention. That is, the first aspect of the present invention is to cut a sheet-like material wound around a winding drum that is guided by a reel drum and is pressed and driven by the reel drum, and cut the cut end to a new winding. In a winding method for switching to a winding drum and winding, a perforated break is formed by running a cutter in a width direction of the sheet-shaped article at a position upstream of the sheet-shaped article which is guided by the reel drum. And at its downstream position,
A thread winding device is used for spirally winding the thread-like material on the new winding drum when the rotation of the new winding drum is started. It is started in synchronism with the time when the sheet reaches the sheet, the sheet-like material is cut along the perforation-like breaking portion by winding the string-like material from below, and the cut end is wound around the new winding drum. A method for switching a sheet-shaped material to a new winding drum, which is characterized in that the winding is performed. A second aspect of the present invention is to cut a sheet-like material wound around a winding drum that is guided by a reel drum and is pressed and driven by the reel drum, and cut the cut end to a new winding. In a winding device that switches to a drum and winds, at a position upstream of the reel drum, a hard roll or a hard plate extending in the width direction of the sheet-like material and having concave portions formed at appropriate intervals, and the hard roll or the hard plate are pressed. A press-cutting blade that is moved by contacting is provided with a perforation-shaped breaking portion forming means for a sheet-like material, and at a downstream position thereof, a string thread guide for passing a string-like material is provided at a lower position of the traveling path of the sheet-like material, A string thread guide moving means adapted to move across the sheet in the width direction thereof, and a fixing means for fixing the leading end of the thread string-like material passing through the thread thread guide to the drum end of the new winding drum. And synchronized with the rotation of the new winding drum. The string thread guide is moved from the string thread fixed end side of the new winding drum to the other end side in the same direction as the running direction of the perforated break forming push cutting blade, and the string thread is transferred to the new winding drum. A thread winding means for spirally winding is provided, and a synchronization means is configured to start the thread winding means when the perforated break of the sheet material reaches the new winding drum portion. Then
The sheet-like material that has reached the new winding drum section is cut along the perforation-shaped breaking portion by winding a string-like material from below, and the cut end is wound around the new winding drum. A winding device for switching a sheet material to a new winding drum.

[0009]

The object of the present invention is to wind a sheet-like material which is difficult to cut with a string thread and difficult to guide-wind the tip of the cutting end of the sheet-like material onto a new winding drum when a cutting blade is used. The problem with this is that the sheet-like material is first preliminarily formed with perforated partial cuts in the width direction,
By forming the sheet-shaped material, which is easily cut by forming the partial cutting portion, so that the partial cutting portion is synchronized with the winding locus of the string thread on the new winding drum, The present invention realizes stable cutting of a sheet-like material by winding with a string-like material and winding around a new winding drum.

FIG. 1 is a diagram for explaining the essential parts of the method and apparatus of the present invention. FIG. 1 (a) is a schematic side view of the apparatus and FIG. 1 (b) is a plan view thereof. In FIG. 1, a sheet 1 reaches a reel drum 2, is guided on the reel drum 2, and is wound up by a winding drum 3 which is pressed by the reel drum 2 and driven by its surface contact. Now, a state in which the winding on the winding drum 3 is in a full state is shown. Before this state is reached, the next (new) winding drum 4 is set in advance above the reel drum 2, and this new winding drum 4 has one end side 5 thereof.
As shown in FIG. 1 (b), a thread winding means in which the leading end of the thread thread 7 which passes through the width direction of the sheet 1 and the lower side thereof and the guide 6 is tied and fixed in advance. The state where S is set is shown.

Further, in FIG. 1, in front of the reel drum 2 and in front of the position where the string-like material 7 is set, that is, upstream of the sheet-like material, the hard roll 8 or the hard plate 9 and the push-cut blade 10 according to the present invention are shown. It is shown that the perforated broken portion forming means C consisting of is provided.

FIG. 2 is a more detailed perspective view of an essential part of the perforated breakage forming means C in FIG. 1 according to the present invention. FIG. 2 (a) shows an object to which the push-cutting blade 10 is pressed. In the case of the hard roll 8, FIG. 2B shows the case of the hard plate 9.
In both cases (a) and (b), the hard roll 8 and the hard plate 9 have recesses 8a, 8b, 8c, ..., 8x, 8y, 8z and By forming the recesses 9a, 9b, 9c, ..., 9x, 9y, 9z, and pressing the cutting blade 10 against this surface to configure a mechanism for traveling in the lengthwise direction, the vehicle is sandwiched between the two and travels. The sheet-like material is formed with perforated breaks 11 that run diagonally in the width direction.

FIG. 3 is a plan view of a sheet-like material showing an example in which the perforated break 11 is formed. Break 1
1 and therefore the non-breaking portion, the sheet-like material 1
It may be appropriately set so that the string thread 7 can be easily cut, depending on the characteristics of the item. The perforation-like breakage portion 11 that leaves the non-breakage portion is formed because it is cut in the entire width direction. Therefore, after cutting, the sheet-like material 1 having no stiffness and having a large friction resistance is formed. This is because, as described above, it is difficult to stably guide the tip of the cutting end onto the new winding drum 4. The perforated broken portion 11 has a perforated portion at the center in the width direction of the sheet-like material 1 and both end portions in the width direction are perforated portions 11 having non-broken portions, so that the perforated portion after cutting is cut. It is possible to wind and wind the new winding drum 4 around the tip without disturbing the tip, but the pattern of the breaking portion 9 may be a perforation-like breaking portion over the entire width. It is not limited.

FIG. 4 is a perspective view at the time of switching to the new winding drum 4. The switching of winding is started, and the new winding drum 4 in which the string thread 7 is fixed in advance at the drum end is the reel drum 2.
It is the figure which showed the state when it descend | falls up and is just starting rotation by surface contact. Here, the string thread guide 6 through which the string thread is passed is located at a lower position of the traveling path of the sheet 1 in the guide groove 12 installed along the drum 4 in the vicinity of the new winding tram 4. 12L of the thread end fixed to the thread 4
From the other end side 12R is shown.

In FIG. 5, the rotation of the new winding drum 4 is started,
At the same time, a perspective view is shown in which the string guide 6 (shown in FIG. 4) starts to move in the guide groove 12 (these illustrations are omitted). By winding the object 7 around the winding drum 4 in a spiral shape,
The breaking portion 1 formed in advance on the sheet-like material 1 by the string-like material 7
1 is broken, and the breaking end 11 is sequentially broken by the winding drum 4
It is the figure which showed the state which winds around.

With respect to the string thread-like material 7 used in this step, the material and the form thereof are not particularly limited, and a thread thread-like material conventionally used is used. Generally, a plurality of polypropylene filaments are aligned in a tow shape so that the filament has a denier of about 750, and a plurality of tow-shaped objects are used.
A thread-like material is used which is twisted so that the total fineness is about 2,600 denier.

As shown in FIG. 4, the string thread 7 is stretched through the lower surface side of the traveling sheet 1 so that the thread thread 7 can be rotated as the new winding drum 4 rotates. Winding drum 4
This is because, when the sheet-like material 1 is wound around the winding drum 4, the sheet-like material 1 is pressed against the winding drum 4 from the lower surface thereof. The reason is that it can be wrapped around 4.

In the present invention, the partial fractured portion 1 formed on the sheet 1 by the perforation-shaped fractured portion forming means C described above.
From the time when the tip of 1 reaches the new winding drum 4, the rotation of the winding drum 4 and the spiral winding of the string thread 7 around the winding drum 4 are started, and The partially broken portion 1
It is essential to wind the string-like material 7 along the line 1, and the purpose can be achieved by synchronizing this. To that end, of course, the traveling speed of the sheet-like material 1, the moving speed of the rupture portion forming push-cut blade 10, the distance between the rupture portion forming means C and the new winding drum 4, the thread guide 6 and the new winding drum 4 are required. It is necessary to match each other's timing from the distance up to, the moving speed of the string guide 6, the descent time of the new winding drum 4 onto the reel drum 1, etc., but such timing is usually adopted. This can be easily done by adopting the existing speed detection / calculation / motion command mechanism.

[0019]

EXAMPLES Hereinafter, the present invention will be described more specifically by way of examples. Example 1; product width 1 m, the upper surface of the polyurethane melt blown nonwoven fabric continuously running of basis weight 50 g / m ^2, similarly product width 1 m, basis weight 50 g / m ^2, made of polyester,
An ordinary card method dry-type nonwoven fabric is fed, laminated, and the running laminated sheet is provided with a heat medium heating type metal roll and a surface smoothing heat medium heating type metal roll on which point engraving with a point adhesion area ratio of 18% is performed. A sheet-like material was formed by heat-bonding the melt blown non-woven fabric and the dry non-woven fabric by pressure-bonding with a combined heating embossing roll. This sheet-like material was subsequently introduced into a surface-driven web winding device, and was wound up at a winding speed of 30 m / min.

In the above winding device, at the front position of the reel drum, that is, at the upstream position in the flow direction of the sheet-shaped material, the hard roll (the lower surface of the sheet-shaped material shown in FIG. A perforated portion for forming a perforated portion of a sheet-like object is provided, which includes a lower blade) and a push-cutting blade (upper blade) that is provided so as to sandwich the sheet-like object traveling on the upper surface of the hard roll and to move the upper surface in the width direction Further, a cord winding means shown in FIG. 4 is provided at the downstream position, and one end of the cord winding end is a drum of a new winding drum to be wound next time, which is prepared above the reel drum. It was fixed to the edge.

Here, the hard roll has a diameter of 15
It is made of an alloy having a length of 7 mm, a length of 1200 mm and a Dockwell C scale hardness of 45 degrees, and as shown in FIG.
Recesses having a width of 2 mm are provided in an annular shape at intervals of 3 mm at the left and right ends 200 mm, and a central portion 800 mm sandwiched between the left and right ends is a convex surface having no recess. The pressing blade is a round blade cutter made of an alloy steel having a diameter of 100 mm and a hardness of 20 degrees, which is 25 mm in the length direction of the hard roll, that is, the width direction of the sheet-like material in this example.
It is provided so that it can move at a speed of 0 mm / sec.
Further, the pressing blade is pressed against the hard roller so that it can be pressed at 10 kgf in this example.

When the winding drum is full for a predetermined length in the winding, the running sheet material is passed through the breaking portion forming means to switch the winding to the new winding drum. As a result, the perforated breaks in which the cuts of 3 mm length were attached at intervals of 2 mm to the both ends of about 100 mm of the sheet-like material of 1 m width, and the central portion of about 800 mm were completely cut, as shown in FIG. It was possible to obtain a sheet-like material having a cut portion as shown in.

Since the sheet-like material has non-cutting portions whose both ends are not completely cut, it continues to run without changing its running state, but after the push-cut blade starts running, Just after 4 seconds, the perforated breakage passes through the new take-up drum section, so the second polypropylene string fixed to the drum end of the new take-up drum is matched at the timing. The winding of the new winding drum is started around the drum (core) of the new winding drum, and the string guide passing through the string-shaped object is moved from the fixed end side to the other end side of the string-shaped object. Then, the press cutting blade was run in the same direction as the running direction at a speed of 250 mm / sec. As a result, the cut end of the web can be wound at the same perforation-like break portion while being cut by the string-like object, and at the same time, without failing in the new winding drum with the string-like object. , Switching to the new take-up drum was possible and stable winding could be performed.

[0024]

As described above, the present invention utilizes the automatic winding of the sheet-shaped material around the new winding drum when the winding means using the thread-shaped material 7 is adopted. If the sheet-shaped material as the object is difficult to cut by the string winding means, it is possible to easily cut the sheet-shaped material in advance by the string winding means before reaching the string winding means. In order to form the partially broken portion so that it can be formed at that time, in order to form the partially broken portion, in a normal shearing type cutter, the target sheet-like object is stably Since it is difficult to maintain the cutting performance, a combination of cutting means using the push-cut method is used, and the locus of the breakage part added to the sheet-shaped material has the same shape as the winding locus of the string winding means around the new winding drum. Yes, and configured so that their trajectories overlap A. That is, the present invention, the elongation at break,
Industrially extremely effective winding method and device for a sheet-like material having a large strength, a firmness and a large surface friction coefficient, and the characteristics of an elastic material. Is.

[Brief description of drawings]

FIG. 1 (a) is a schematic side view of the present apparatus.
FIG. 1B is a plan view of FIG.

FIG. 2 is a perspective view of an essential part of a perforated break portion forming means (C) according to the present invention.

FIG. 3 is a plan view of an example of a sheet-like material in which a perforated break is formed.

FIG. 4 is a perspective view when switching to a new winding drum.

FIG. 5 is a perspective view at the start of rotation of a new winding drum.

[Explanation of symbols]

1 sheet-like material 2 reel drum 3 winding drum 4 new winding drum 5 drum end 6 string thread guide 7 string thread-like object 8 hard roll 8a, 8b, 8c, ... 8x, 8y, 8z recessed part of hard roll 8 9 Hard plate 9a, 9b, 9c, ... 9x, 9y, 9z Recessed part of hard plate 9 Push-cut blade 11 Breaking part attached to sheet-like material 12 Guide groove of thread guide 6 12L New winding drum of thread-like material 7 4 fixed end side to 4 4R non-fixed end side of new winding drum 4 of string thread 7 C perforated breakage forming means S string winding means

Claims (2)

[Claims] 1. A sheet-shaped material, which is guided by a reel drum and wound on a winding drum that is pressed and driven by the reel drum, is cut, and the cut end is switched to a new winding drum and wound. In the take-up winding method, at the upstream position of the sheet-like material which is guided by the reel drum, a cutter is made to travel in the width direction of the sheet-like material to form a perforated break, and at the downstream position thereof. A winding means for winding a thread on the drum at the start of rotation of the new winding drum is used. It is started in synchronism with the time when the sheet reaches the section, and the sheet-like material is cut along the perforation-like breaking portion by winding the string-like material from below, and the cut end is wound on a new winding drum. New sheet material characterized by being wound up Switching method to take-up drum. 2. A sheet-shaped material, which is guided by a reel drum and wound on a winding drum that is pressed and driven by the reel drum, is cut, and the cut end is switched to a new winding drum and wound. In a take-up winding device, a hard roll or a hard plate that extends in the width direction of the sheet-like material and has concave portions formed at appropriate intervals at an upstream position of the reel drum, and a push-cut device that moves by pressing the hard roll or the hard plate. A perforation-shaped breaking portion forming means for a sheet-like material, which comprises a blade, is provided, and a string thread guide for passing the string-like material is provided at a downstream position of the means for lowering the sheet-like material at a traveling path lower position. It consists of a string thread guide moving means that moves across the width of the string thread guide and a fixing means that fixes the leading end of the string thread-like material that has passed through the thread thread guide to the drum end of the new winding drum. The perforations are synchronized with the rotation of the drum. The string thread guide is moved from the fixed end side of the new winding drum to the other end side in the same direction as the running direction of the push-cut blade for forming the broken portion, and the string thread is spirally wound to the new winding drum. A thread winding means for winding is provided, and a synchronization means is configured to start the thread winding means when the perforated broken portion of the sheet-like material reaches the new winding drum section. The sheet-like material reaching the drum portion is cut along the perforation-like broken portion by winding a string-like material from below, and the cut end is wound around a new winding drum and wound up. A rewinding device for switching to a new rewinding drum of a sheet-like material.