JPH0715751Y2 - Slitting machine for laminated film for packaging - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a slitter device used for cutting a wide packaging laminated film into a plurality of packaging laminated films having a predetermined width, and more particularly, In order to provide a packaging bag that is easy to open, the laminated film for packaging having a predetermined width is cut from the laminated film for packaging having a wide width, and at least one side end portion of the laminated film for packaging is provided with the laminated film. It is possible to form a tear-induced scratch that penetrates.

(Prior Art) As a conventional laminated film for packaging that has been proposed for the purpose of facilitating the opening of a packaging bag, for example, the applicant previously disclosed in JP-A-62-39465.

This is because at least one side end portion of a packaging laminated film having a required width has a tear-induced scratch penetrating the laminated film at a position separated from the film side edge by a predetermined lengthwise direction. According to a packaging bag formed by heat-sealing the laminated film with an automatic filling bag-making machine, for example, the tear film will be located in the heat-sealed portion of the packaging bag. Due to the action of induced scratches, the packaging bag can be extremely easily
And it can be opened smoothly.

Here, when such a packaging laminated film is manufactured on a trial basis, the formation of penetrating scratches on the film side end portion is a tool having a needle-shaped protrusion, a tool having a cutting blade, and a knurled rotary tool. The above was performed by manually pressing the side edge portion of the packaging laminated film having a required width.

(Problems to be Solved by the Invention) Although the above-described method of forming penetrating scratches does not cause any particular problem when a laminated film for packaging is produced on a trial basis, the practical use of the laminated film is There is a strong demand for the appearance of a method for forming penetrating scratches with high work efficiency and accuracy, which cannot be tolerated in terms of efficiency and work accuracy.

Incidentally, the work accuracy here, finally, with respect to the side edge position of the packaging laminate film of a predetermined width cut from the wide packaging laminate film, means the position accuracy of the penetrating scratch, in the film width direction. However, in order to improve this work accuracy, usually, a pattern, a letter, a packaging laminated film on which printing such as symbols is applied, with respect to a printed pattern, a penetrating scratch,
It is necessary to be accurately formed at a predetermined position in the film width direction. In other words, of the laminated film for wide packaging,
The cutting into the laminated film for a predetermined width packaging is performed under the action of the meandering correction mechanism, of course, based on the printed pattern or the like applied to the laminated film for the wide width packaging, so that a penetration scratch to the printed pattern or the like is caused. When the forming accuracy is low, no matter how much the cutting accuracy by the slitter device is increased, it is impossible to improve the above-mentioned working accuracy.

By the way, to the laminated film, if only considering the point of efficient formation of penetrating scratches, the film that has undergone the laminating step, its winding, existing at an appropriate position in the middle of rewinding, etc. Or on the newly attached guide roll,
It is possible to form penetrating scratches in the laminated film at a high speed by pressing a bladed roll or the like.

However, in the case of forming a penetrating scratch at the position on the front side of winding of the film after the lamination process,
Even if the film winding means has a conventionally known meandering correction mechanism, firstly, the meandering correction by the meandering correction mechanism prevents the film from being unwound on the winding means. The winding means itself is horizontally displaced, and the meandering of the film that may occur due to the laminating process is erased at the position of the through-scratch formation on the front side of the winding by the film winding means. Secondly, and secondly, at the point of formation of the penetrating wound,
Even if the meandering of the film could be erased sufficiently, the meandering correction here is performed based on the side edge position of the film after the laminating process, regardless of the position of the printed pattern. Yes, and the side edge position is
It changes in relation to the width of the laminated layer with respect to the printed film, etc., and always maintains a constant relative relationship between the film side edge position and the position of the printed pattern etc. Since it is not possible, it is practically impossible to reliably position the penetrating scratch formed before the film is wound at the intended widthwise position with respect to the printed pattern or the like.

In addition, for the purpose of inspection and other purposes, when a wound damage is formed in the rewinding of the once-wound wide-width packaging laminated film, this also often refers to the side edge position of the laminated film as a reference. Since the meandering correction mechanism is operated, similarly to the above, there is a disadvantage in that the accuracy of forming a penetrating scratch on a printed pattern cannot be improved. On the other hand,
When the meandering correction mechanism is improved so as to operate based on the printed pattern or the like, the above inconvenience can be removed, and the accuracy of forming penetrating scratches on the printed pattern or the like can be effectively increased. However, even if the accuracy of forming the penetration scratch is increased in this way, when cutting the wide packaging laminate film having the penetration flaw formed into a packaging laminate film having a predetermined width, the wide packaging laminate film is separately provided. Since it is necessary to apply it to the slitter device, it is inevitable that the formation error of the penetrating scratches and the cutting error by the slitter device are accumulated, and the penetrating scratches are generated at the side edge position of the laminated film for packaging having a predetermined width. From this, it was also virtually impossible to always precisely position the initial position, on the order of hundreds of microns.

The present invention has been made as a result of studying to solve all such problems, and an object of the present invention is to sufficiently improve the accuracy of forming a penetrating scratch on a laminated film for wide packaging and to provide a slitter. By making the cutting error by the device approximately equal to the formation error of the through-hole, it is possible to sufficiently eliminate the risk of the cutting error accumulated by the slitter device with respect to the formation error of the through-hole, and it is possible to greatly improve the working accuracy. , In other words, the through hole for the printed pattern, etc., under high formation accuracy, with respect to the side edge position of the laminated film for packaging with a predetermined width,
Another object of the present invention is to provide a slitter device capable of sufficiently enhancing the positional accuracy of penetrating scratches in the width direction.

(Means for Solving the Problems) The slitting device for a laminated film for packaging of the present invention is
A plurality of guide rolls were horizontally arranged at a predetermined interval between the feeding means provided with the meandering correction mechanism of the laminated film and the winding means, and were arranged close to the winding means. At a position adjacent to the winding means side of the one guide roll,
With at least one slitter blade disposed, driven forward and backward with respect to the guide roll, and at least one of the bladed rolls pressed by the required force to the guide roll, the front side position of the slitter blade Then, it is rotatably arranged at a position close to the slitter blade, and the bladed roll is formed with mountain-shaped cutting blades at predetermined intervals in the circumferential direction and the axial direction, respectively.

(Operation) Generally, in a slitting device having a plurality of horizontal guide rolls, the feeding state of the wide-width packaging laminated film attached to the feeding means is determined based on the action of the meandering correction mechanism based on the printed pattern. By horizontal movement of the means in the axial direction, in the width direction of the laminated film, by automatic adjustment with high accuracy, at least at the position where the slitter is provided, the laminated film is substantially meandered in the width direction. It is to be completely erased.Therefore, when the wide-width packaging laminated film reaches the slitter blade fixed at a predetermined position close to the winding means through a plurality of horizontal guide rolls, the wide-width packaging laminated film is The film is always accurately cut at the intended widthwise position to form a laminated film for packaging having a predetermined width.

This means that even if the meandering correction mechanism acts on the horizontal guide rolls located near the feeding means, the time lag between the time when it acts and the time when the meandering to the wide packaging laminate film occurs occurs. , It is difficult to sufficiently eliminate the meandering of the wide-width packaging laminated film, the laminated film passes through a plurality of horizontal guide rolls, as the horizontal direction travels in the direction of the winding means with the fixed horizontal position, This is due to the fact that the meandering of the laminated film on the guide roll is gradually eliminated by the sideslip of the laminated film in the axial direction of the horizontal guide roll, etc., and as a result, at the position where the slitter blade is arranged, the laminated film is formed. This is because the meandering of is so small that it can be ignored.

Therefore, in the device of the present invention, on the premise of such a slitter device, a penetrating scratch is formed with high accuracy at a predetermined position in the width direction of the laminated film without being affected by the meandering of the fed wide film for laminating packaging. In order to make it possible, place a roll with a blade on the front side of the slitter blade at a position sufficiently close to the slitter blade.

According to this, the wide packaging laminated film delivered from the delivery means, it passes through a plurality of horizontal guide rolls, until it reaches the front side position of the slitter blade,
As mentioned above, the meander is almost completely erased,
Therefore, the bladed roll is operated to advance with respect to the horizontal guide roll, and by pressing the horizontal guide roll through the wide packaging laminated film, the wide packaging laminated film has a required penetrating scratch, Without being affected by the meandering of the wide-width packaging laminated film, it can be formed sufficiently accurately with excellent positional accuracy in the width direction with respect to its printed pattern and the like.

Then, after that, with a slitter blade, by immediately cutting the laminated film for packaging of a predetermined width, because the roll with a blade and the slitter blade are sufficiently close to each other, the cutting accuracy by the slitter blade, the formation of penetrating scratches The accuracy can be made almost equal, and therefore, the accumulation of the cutting error and the penetration scratch formation error can be sufficiently prevented, and the positional accuracy of the penetration scratch in the width direction with respect to the packaging film having a predetermined width can be greatly improved. You can

Thus, the packaging laminated film after being cut by the slitter blade has a highly accurate penetrating scratch formed at a position separated from the one side edge by a predetermined distance.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic line side view showing an embodiment of the present invention.

In the figure, 1 is a means for feeding a wide-width packaging laminated film,
Reference numeral 2 denotes a winding means for the laminated film for packaging having a predetermined width, which is cut into a predetermined width from the laminated film for packaging having a wide width. Here, the feeding means 1 is provided with a meandering correction mechanism (not shown) provided therein, and this meandering correction mechanism which has been widely and conventionally used has a portion of the feeding means 1 shown in FIG. It functions to move horizontally according to the amount of meandering of the film in the direction orthogonal to.

In this case, a total of six guide rolls 3 to 8 are horizontally arranged between the two means 1 and 2 at predetermined intervals in the horizontal direction and the vertical direction. Each of these rolls 3 to 8 is a feeding means when the wide-width packaging laminated film 9 fed from the feeding means 1 runs meandering in the axial direction of the roll due to winding misalignment or the like. 1 is horizontally displaced in a direction orthogonal to the paper surface by the detection of meandering based on the action of a position detecting means (not shown) and the operation of a meandering correcting mechanism provided in the feeding means 1, and the meandering is corrected. 9,
It functions to gradually reduce the amount of displacement in the width direction between the meandering position and the correction position, and therefore, the contact position of the laminated film 9 with respect to the guide rolls 7 and 8 arranged close to the winding means 2. Can be always at a substantially constant position regardless of whether or not the laminated film 9 meanders.

Further, here, at least one blade rotatably supported with respect to any one of the guide rolls 3 to 8, preferably one guide roll 7 located near the winding means 2 as in the illustrated example. The bladed roll 10 is arranged so as to be able to move forward and backward, and the bladed roll 10 is moved forward and backward with respect to the guide roll 7 by a reciprocating drive means that can be, for example, an air cylinder 11, and is pressed with a required force. If possible, at least one slitter blade 12 is arranged at a position adjacent to the winding means side of the guide roll 7, that is, at a position between the guide rolls 7 and 8.

Here, it goes without saying that the pressing position of the bladed roll 10 against the guide roll 7 may be any position within the contact region of the packaging laminated film 9 with the guide roll 7. The closer the pressing position is to the front side of the slitter blade 12, the closer the cutting accuracy of the slitter blade 12 is to the accuracy of penetrating flaw formation.

By the way, the bladed roll 10 of this example is shown in FIG.
As shown in the cross-sectional view in the width direction and the circumferential direction in (b), a plurality of chevron-shaped cutting blades 10a are provided at predetermined intervals in the width direction and the circumferential direction, respectively. The blade 10 presses the blade edge 10b that forms the ridgeline thereof against the surface of the guide roll 7 with a predetermined force, so that the laminated film 9 passing between the guide roll 7 and the bladed roll 10 has a blade edge length. Produces penetrating scratches depending on the size.

The forward / backward displacement of the bladed roll 10 with respect to the guide roll 7 is a frame for rotatably supporting the bladed roll 10.
This is made possible by disposing a sliding guide 15 extending in a direction orthogonal to the axis of the guide roll 7 between the base plate 14 and the base plate 14, and the forward / backward movement of the bladed roll 10 and the roll 10 As shown in the enlarged side view of FIG. 3, each of the pressing of the air cylinder 11 to the guide roll 7 is carried out by the vertical cylinder 16 provided on the base plate 14.
This is possible by mounting the rod and connecting the rod of the air cylinder 11 to the frame 13.

Further, further, the required position of the roll 10 with blade in the width direction of the laminated film 9 for packaging, in other words, the guide roll 7
The base plate 14 is slidable by the cross guide 17 in the direction parallel to the axis of the guide roll 7 so that the base plate 14 can be moved to the required position in the axial direction and fixed thereto. With the cooperation of the set screw 18 and the spacer 19 screwed on the base plate 14,
And the cross guide 17 can be frictionally engaged with each other.

When using such a slitter device, first, the wide packaging laminated film 9 attached to the feeding means 1 is
After winding the guide rolls 3 to 8 as shown in FIG. 1 or before the winding, move one or more blade rolls 10 to a required position in the axial direction of the guide roll 7. Position it there and roll with blades 10
Is caused to contact the guide roll 7 with a required force by the operation of the air cylinder 11, and at the same time, one or more slitter blades are used.
12 is also moved to the required position and fixed in position.

Thereafter, the laminated film 9 is fed at a required speed by the subsequent operation of the winding means 2 or the operation of the winding means 2 following the predetermined winding of the laminated film 9 on the guide rolls 3 to 8. As a result, through-roll scratches 20 as shown in, for example, FIG. 4 are formed at a required position of the laminated film 9 with high precision under the pressing and rotating motion of the bladed roll 10, and the laminated film 9 is By the action of the slitter blade 12, in many cases, it is cut at each position shown by a solid line and a one-dot chain line in the drawing to obtain a plurality of predetermined width packaging laminated films having a predetermined width.

The laminated film for packaging with a predetermined width thus obtained,
Forming a through-scratch 20 by the bladed roll 10, and cutting to a predetermined width by the slitter blade 12 positioned close to the bladed roll 10, respectively, in addition, with high accuracy also between them. Based on what is done, as mentioned above, it will have precisely formed penetrating wounds at the intended locations.

In addition, here, the distance from the side edge position of the laminated film for a predetermined width packaging laminated film cut by the slitter blade 12 to the position where the penetrating scratch is formed, the perforation scratch having a substantially perforated shape, the width of the laminated film for a predetermined width packaging Direction and length spacing, etc.,
When the relative relationship with the required tear force was examined, the results were as follows.

Here, the laminated film for packaging is composed of a laminated structure of a biaxially stretched nylon film layer having a thickness of 15 μm, a polyethylene layer having a thickness of 25 μm, and an ethylene-vinyl acetate copolymer layer having a thickness of 25 μm, and has a predetermined structure. The size of the tearing force required to open the packaging bag formed by sealing the packaging laminated film cut into widths on three sides was measured while changing the blade edge position of the bladed roll in various ways. The average tearing force for each bag is as shown in Table 1, and the required tearing force is
Up to about 200 g, it was intuitively very easy to open.

Here, when the blade edge position is changed in a laminated film having a predetermined width, as shown in FIG. 5, the distance from the film side edge to the penetrating scratch is A, the penetrating scratch The distance A is 0.2 mm, 0.4 mm, and 0.6 mm, respectively, where B is the pitch in the length direction, C is the spacing between penetrating scratches in the film width direction, and D is the length of one penetrating scratch in the film width direction. The pitch B is changed to 0.5 mm, 1.0 mm, and 1.5 mm, and the interval C is changed to 0.5 mm, 1.0 mm, and 1.5 mm, while the length D is maintained at a constant length of 0.8 mm. It was done by doing.

(Effects of the Invention) Thus, according to the present invention, by disposing the bladed roll and the slitter in association with the one guide roll located in the vicinity of the winding means, the penetration scratch formation position and At the cutting position, the meandering of the film can be almost completely erased, and the processing accuracy of each processing for printing patterns etc. can be sufficiently improved, and moreover, the bladed roll and the slitter blade are arranged sufficiently close to each other. By setting the formation accuracy of the penetrating scratch and the cutting accuracy to be substantially equal to each other, the accumulation of the processing error of each processing is prevented, and the penetrating scratch as expected is extremely formed on the laminated film for packaging having the predetermined width. It can be formed with high precision, and the work efficiency can be greatly improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view showing an embodiment of the present invention, FIG. 2 is a sectional view illustrating a bladed roll, and FIG. 3 is support and operation of a bladed roll. FIG. 4 is an enlarged side view showing the mechanism, FIG. 4 is a plan view showing a state of formation of a penetrating wound, and FIG. 5 is a plan view showing dimensions of the penetrating wound. DESCRIPTION OF SYMBOLS 1 ... Feeding-out means, 2 ... Winding-up means 3-8 ... Guide roll, 9 ... Wide laminated film for packaging 10 ... Blade roll, 10a ... Cutting blade 10b ... Blade edge, 11 ... Air cylinder 12 ... Slitting blade, 13 … Frame 14… Base plate, 15… Sliding guide 17… Cross guide, 18… Set screw 19… Spacer, 20… Penetration scratch

Claims (1)

[Scope of utility model registration request] 1. A plurality of guide rolls are horizontally disposed at a predetermined interval between a feeding means provided with a meandering correction mechanism for a laminated film for packaging and a winding means, and the winding means is used as a winding means. At least one slitter blade is arranged at a position adjacent to the winding means side of one guide roll located in close proximity, and is driven forward and backward with respect to the guide roll, and required for the guide roll. At least one of the bladed rolls pressed by force, on the front side of the slitter blade,
Arranged rotatably in a position close to the slitter blade,
A slitting device for a laminated film for packaging, comprising a plurality of chevron-shaped cutting blades located at predetermined intervals in the circumferential direction and the axial direction on the bladed roll.