WO2010064571A1 - Method for drawing cutting aid line - Google Patents

Abstract

A method for drawing a cutting aid line is provided in which a cutting aid line can be drawn on a film regardless of the thickness of the film, the cutting aid line rendering the film cuttable along a given line.  The method for drawing a cutting aid line comprises: sandwiching a film which is either a food-packaging material or a component of the packaging material between a horn to which an ultrasonic wave is propagated and a pedestal; and propagating an ultrasonic wave to the horn, with the film thus sandwiched, thereby melting the film and drawing a groove-shaped cutting aid line on the film.  The pedestal has an end part for sandwiching the film between the end part and the horn, the end part being tapered in at least one direction.  While the film sandwiched between the horn and the pedestal is tensed in the direction perpendicular to the width direction of the end part of the pedestal, an ultrasonic wave is propagated to the horn, thereby drawing on the film a cutting aid line extending in the direction perpendicular to the width direction of the end part of the pedestal.

Description

Cutting auxiliary line forming method

The present invention relates to a cutting auxiliary line forming method for forming a cutting auxiliary line for cutting (cutting) the film on a packaging material for packaging food or a film constituting one of the packaging materials.

Conventionally, various types of packaging materials for packaging foods such as rice balls such as rice balls and sushi, breads such as sandwiches, confectionery breads, and side dishes breads are provided according to the packaging form. However, as one of them, there is one in which the entire packaging material or a part of the packaging material is formed of a resin film.

Such a packaging material is generally provided with a linear or strip-shaped cutting aid on the film constituting the packaging material, and can be opened by tearing the film with the cutting aid.

Here, the packaging material for packaging rice balls will be described. The packaging material is superimposed on the outer film through a sheet-shaped food such as laver, thin baked eggs, and tatami mushrooms, which is configured to be separable in the width direction. And an inner film configured to be separable in the width direction, and an outer peripheral end portion of the outer film and an outer peripheral end portion of the inner film are welded so as to surround the sheet-like food. The outer film is provided with cutting auxiliary means extending in a direction orthogonal to the width direction. On the other hand, the inner film is composed of a pair of films arranged in parallel in the width direction, or, like the outer film, provided with cutting assisting means extending in a direction perpendicular to the width direction with respect to one film. Have been.

The packaging material of the above configuration is folded in two in the direction orthogonal to the width direction with the inner film inside with the rice balls placed on the inner film, and the ends of the opposing inner films are welded together, You can wrap rice balls. And the packaging material is a state where the rice ball and the sheet are obtained by splitting the outer film in the width direction by dividing the outer film with a cutting assisting means (dividing into two parts) and separating the inner film in the width direction. The inner film is pulled out from between the food. Thereby, the packaging material of the said structure becomes the state which the rice ball and sheet-like food which were isolate | separated via the inner film become integral, and can eat these together.

Further, pillow packaging is known as a packaging form for packaging foods such as confectionery and bread such as confectionery bread and side dish bread. In such pillow packaging, food is placed on a film as a packaging material, the film is formed into a cylinder so as to wrap the food, and both end portions are welded together, and both ends of the tubular film are welded together. By doing so, food is packaged. Even in such pillow packaging, there is a packaging material (film) provided with cutting assisting means, and the packaging material can be cut by the cutting assisting means so as to be opened.

By the way, until now, cut tape has been adopted as the mainstream of the cutting assisting means in any packaging form, but since the cut tape is bonded to the film through an adhesive or the like, the food is heated in a microwave oven or the like. In such a case, the adhesive may be softened and the cut tape may be peeled off from the film or the adhesive may be melted out.

In order to solve such a problem, it has been proposed to provide a perforation on the film as a cutting auxiliary means. However, the perforation is provided intermittently (broken line) with respect to the film. For this reason, when the perforation is used as a cutting assist means because each cut communicates with the inside and outside, which is not preferable for hygiene, the film for closing that closes the perforation (each cut) is the film constituting the packaging material. On the other hand, it is stuck by an adhesive or heat seal. Therefore, when the perforation is adopted as a cutting assisting means for cutting the film, it becomes difficult to open the film due to the presence of the closing film, and as in the case of the cut tape, when food is heated in a microwave oven or the like. The adhesive may soften and the cut tape may peel off from the film or the adhesive may melt out.

Therefore, it has been proposed to adopt a half cut as a cutting auxiliary means for cutting the film (opening the packaging material). Such a half cut is formed in an elongated groove shape on the film by melting a film that becomes a packaging material with ultrasonic waves or the like. As a result, the packaging material (film) has a thin portion corresponding to the half cut. Thereby, when a half cut is employ | adopted as a cutting | disconnection auxiliary | assistant means, since inside and outside do not communicate, there is no entrance | invasion of a water | moisture content etc., and it can package a foodstuff in a hygienic favorable state. Also, when a tensile force is applied to the film in a direction perpendicular to the direction in which the half cut extends, the force acts intensively on the portion corresponding to the half cut (stress concentration occurs). It is said that the packaging material can be easily cut and opened at the portion where the film becomes thin and fragile (see, for example, Patent Documents 1, 2, and 3).

Japanese Unexamined Patent Publication No. 2008-1000074 Japanese Unexamined Patent Publication No. 2008-37495 Japanese Unexamined Patent Publication No. 9-84536

By the way, there is a case where it is required to reduce the thickness of the packaging material (film) for packaging food, but when the half-cut is provided in the thin film, the packaging material (film) is opened when the packaging material is opened. ) May not be cut along the half cut. That is, when the thickness of the film is reduced, the depth of the half cut (groove) formed on the film becomes shallower. Therefore, when the film is cut (the packaging material is opened), the film is not induced to the half cut. In some cases, it was impossible to cut along the half cut.

Therefore, the conventional half-cut has a problem that it is difficult to take out the food without being in a predetermined opened state in various packaging forms.

Then, in view of such a situation, the present invention has an object to provide a cutting auxiliary line forming method capable of forming a cutting auxiliary line that can be cut on a predetermined line on the film regardless of the thickness of the film. To do.

In the cutting auxiliary line forming method according to the present invention, the packaging material for packaging food or the film that is one configuration of the packaging material is sandwiched between a horn to which an ultrasonic wave of a predetermined frequency is applied and a receiving material, A cutting auxiliary line forming method for forming a groove-shaped cutting auxiliary line on a film by applying an ultrasonic wave to the horn, wherein the receiving material is at least one of the tip portions sandwiching the film together with the horn. The width of the direction becomes narrower as it goes to the tip, and ultrasonic waves are applied to the horn while applying tension in the direction perpendicular to the width direction of the tip of the receiving material to the film sandwiched between the horn and the receiving material. And a cutting auxiliary line extending in a direction orthogonal to the width direction of the front end portion of the receiving material is formed on the film.

According to the above cutting auxiliary line forming method, the receiving material is formed narrower as the width of at least one direction of the front end portion sandwiching the film together with the horn toward the front end, and the film sandwiched between the horn and the receiving material. In contrast, ultrasonic waves are applied to the horn while applying tension in a direction perpendicular to the width direction of the front end portion of the receiving material, and a cutting auxiliary line extending in a direction perpendicular to the width direction of the front end portion of the receiving material is formed on the film. Therefore, when the ultrasonic wave is applied to the horn with the film sandwiched between the horn and the receiving material, the film is melted by the vibration energy of the horn, and the melted portions are on both sides of the front end portion of the receiving material ( It will be pushed away on both sides in the width direction. Thereby, while the part corresponding to the part in which the front-end | tip part exists in a horn becomes thin, the both sides of the thin part become the raised part which rose.

Then, in a state where the film is sandwiched between the horn and the receiving material (when the film is melted), a tension is applied to the film in a direction perpendicular to the width direction of the front end portion of the receiving material. The two sides of the receiving material (both sides of the thinned part) because the two sides between the two points of action acting on the tension (scheduled positions where the auxiliary cutting line is to be formed) tend to approach the inside (between the points of action) The melted portions (bumps) of the film that have been pushed away will approach each other. As a result, a long and deep groove-shaped cutting auxiliary line is formed between the raised portions close to each other.

When the film is pulled in a direction perpendicular to the cutting auxiliary line, the tensile force (tension) concentrates on the portion corresponding to the cutting auxiliary line whose thickness is extremely different from the surrounding thickness, and the film becomes thin. It will be cut at the weakened part (on the cutting auxiliary line). And, when the film is cut in this way, even if the film is torn in the direction intersecting with the direction in which the auxiliary cutting line extends, ridges with increased strength are formed on both sides of the auxiliary cutting line. The film will tear along the cutting aid line. Therefore, when the film becomes the entire packaging material or one configuration of the packaging material, the packaging material can be cut along the auxiliary cutting line with good appearance. As a result, the packaging material can be opened well.

As one aspect of the present invention, it is preferable that the front end portion of the receiving material is formed so that both sides in the width direction form an obtuse angle, and the width becomes narrower toward the front end. If it does in this way, when forming a cutting auxiliary line, it can prevent that a film will be cut carelessly. Also, if the tip of the backing material is formed at an obtuse angle, when the film is sandwiched between the backing material and the horn and melted, the amount pushed away on both sides of the tip of the backing material will increase, and the rise of the raised portion will be increased Can do. Thereby, the depth of the cutting auxiliary line formed in the groove shape can be increased, and the strength on both sides of the cutting auxiliary line can be further increased. Therefore, the film can be more reliably cut along the cutting auxiliary line.

And as another aspect of the present invention, a long film is adopted as the film, the long film is intermittently conveyed in the longitudinal direction, and the long film in a stopped state has the width direction of the leading end as the longitudinal direction of the film. The horn is sandwiched between the receiving material and the horn arranged so as to coincide with each other, and ultrasonic waves are applied to the horn while applying a tension in a direction orthogonal to the longitudinal direction to the long film, and orthogonal to the longitudinal direction of the long film. A cutting auxiliary line extending in the direction to be formed may be formed. Normally, when a long film is transported in the longitudinal direction, tension acts between the upstream side and the downstream side of the film during the transport, so the auxiliary cutting line is orthogonal to the longitudinal direction (conveying direction) of the long film. If it is formed so as to extend in the direction, the long film may be broken by the auxiliary cutting line during the conveyance of the long film.

Therefore, when a long film is transported in the longitudinal direction, it is strictly prohibited to form a cutting auxiliary line so as to extend in a direction orthogonal to the longitudinal direction of the long film. Since the tension in the direction orthogonal to the longitudinal direction (conveying direction) is applied to the film, even if the auxiliary cutting line is formed to extend in the direction orthogonal to the longitudinal direction of the long film, the film is long. The film will not tear. Thereby, since the selectivity of the supply pattern of a long film increases, various forms of packaging materials (manufacture of packaging materials) can be targeted.

The cutting auxiliary line forming method according to the present invention can provide an excellent effect that a cutting auxiliary line that can be cut on a predetermined line can be formed on the film regardless of the thickness of the film.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the packaging material for cooked rice processed food which concerns on 1st embodiment of this invention, Comprising: (a) shows the whole disassembled perspective view including the partial expanded sectional view of an inner film and an outer film, (b) The whole perspective view is shown. The perspective view for demonstrating the method of packaging a rice ball with the packaging material for processed rice foods concerning 1st embodiment is shown. The perspective view of the state which packaged the rice ball with the packaging material for cooked rice foods concerning a first embodiment is shown. The conceptual diagram of the manufacturing equipment of the packaging material for cooked rice processed food which concerns on 1st embodiment is shown. The perspective view of the horn of a cutting auxiliary line formation part and receiving material in the manufacturing equipment (and automatic packaging machine for pillow packaging which concerns on 2nd embodiment of this invention) of the packaging material for cooked rice processed food which concerns on 1st embodiment is shown. . The function of the cutting auxiliary line forming part (cutting auxiliary line forming method) in the equipment for manufacturing cooked rice food packaging material according to the first embodiment (and the automatic packaging machine for pillow packaging according to the second embodiment of the present invention). Explanatory drawing for demonstrating is shown. The function of the cutting auxiliary line forming part (cutting auxiliary line forming method) in the equipment for manufacturing cooked rice food packaging material according to the first embodiment (and the automatic packaging machine for pillow packaging according to the second embodiment of the present invention). It is explanatory drawing for demonstrating, Comprising: (a) shows the schematic of the state which pinched | interposed the film with the horn and the receiving material, and provided the ultrasonic wave to the horn, (b) shows the cutting auxiliary line. A schematic explanatory diagram is shown to explain the process. The perspective view for demonstrating the packaging material (packaging form) which packaged the foodstuff with the automatic packaging machine for pillow packaging which concerns on 2nd embodiment of this invention is shown. The conceptual diagram of the automatic packaging machine for pillow packaging which concerns on 2nd embodiment is shown. The perspective view of the horn and receiving material which concern on other embodiment of this invention is shown. The schematic of the manufacturing equipment (manufacturing method) of the packaging material for cooked rice foodstuffs concerning another embodiment of this invention is shown. It is a conceptual diagram of the manufacturing method of the packaging material for cooked rice processed food which concerns on another embodiment of this invention, Comprising: (a) is the cutting auxiliary line extended in a longitudinal direction with respect to the 1st elongate film used as an outer film. A conceptual diagram of a manufacturing method in which a cutting auxiliary line extending in the longitudinal direction is formed with respect to the second long film to be an inner film, and both long films are conveyed (supplied) in the same direction. (B) shows a cutting auxiliary line extending in the longitudinal direction with respect to the first long film that becomes the outer film, and adopts a pair of belt-like films as the second long film that becomes the inner film. The conceptual diagram of the manufacturing method which conveyed the long film in the same direction (supply) is shown. It is a conceptual diagram of the manufacturing method of the packaging material for cooked rice processed food which concerns on another embodiment of this invention, Comprising: (a) is the cutting assistance extended in a transversal direction with respect to the 1st long film used as an outer film. A concept of a manufacturing method in which a wire is formed and a cutting auxiliary line extending in the longitudinal direction is formed with respect to the second long film to be an inner film, and both long films are conveyed (supplied) in a direction orthogonal to each other. (B) shows a cut auxiliary line extending in the short direction with respect to the first long film to be the outer film, and (b) adopts a pair of strip films as the second long film to be the inner film And the conceptual diagram of the manufacturing method which conveyed (supplied) both long films in the orthogonal direction is shown.

Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings. In this embodiment, in the manufacturing process of the cooked rice packaging material for packaging rice balls (hereinafter simply referred to as packaging material), the film (packaging material film) that constitutes one component of the packaging material assists in cutting. A case where a line is formed will be described as an example.

Here, prior to the explanation of the cutting auxiliary line forming method (the manufacturing process of the packaging material) for the film (film for packaging material) which is one component of the packaging material, the packaging material will be outlined.

As shown in FIGS. 1 (a) and 1 (b), the packaging material includes an inner film 10 configured to be separable in the width direction, and an outer film that is superimposed on the inner film 10 with the sheet-like food S interposed therebetween. 15 and the outer peripheral end of the inner film 10 and the outer peripheral end of the outer film 15 are welded to each other so as to surround the sheet-like food S. In each figure, a region to which dots are attached is shown as a welded region or a welded region.

The inner film 10 is composed of a single film and is formed in a rectangular shape. The inner film 10 according to the present embodiment is formed with a cutting auxiliary line 11 extending in the longitudinal direction through a substantially center in a direction (short direction) orthogonal to the longitudinal direction. The auxiliary cutting line 11 is formed in a groove shape. Thereby, as for the inner film 10, the site | part in which the cutting auxiliary line 11 was formed is thin. That is, in the inner film 10, the portion corresponding to the cutting auxiliary line 11 is thinner than the initial thickness (the thickness of the packaging material film that becomes the inner film 10).

And since the cutting auxiliary line 11 is formed in the inner film 10 which concerns on this embodiment by the cutting auxiliary line formation method mentioned later, the upheaval raised along the cutting auxiliary line 11 on both sides of the cutting auxiliary line 11 Portions 12 and 12 are formed. The raised portions 12, 12 of the inner film 10 are opposite to the portion corresponding to the cutting auxiliary line 11 (thinned portion), rather than the initial thickness (thickness of the film for packaging material that becomes the inner film 10). It is thick. Thereby, as for the inner film 10, while the depth of the cutting auxiliary line 11 is ensured, the intensity | strength of the both sides of this auxiliary cutting line 11 is stronger than another part.

The outer film 15 is composed of a single film and has a rectangular shape. The outer film 15 according to the present embodiment is formed with a cutting auxiliary line 16 extending in the longitudinal direction through substantially the center in the direction (short direction) orthogonal to the longitudinal direction. That is, the outer film 15 according to the present embodiment is formed in the same shape and the same size as the inner film 10. Accordingly, the auxiliary cutting line 16 formed on the outer film 15 is also formed in a groove shape. Thereby, as for the outer film 15, the site | part in which the cutting auxiliary line 16 was formed is thin. That is, the outer film 15 has a portion corresponding to the cutting auxiliary line 16 that is thinner than the original thickness (the thickness of the film for packaging material that becomes the outer film 15).

And since the cutting auxiliary line 16 is formed in the outer film 15 which concerns on this embodiment by the cutting auxiliary line formation method mentioned later similarly to the inner film 10, this cutting auxiliary line is formed in the both sides of the cutting auxiliary line 16 Raised portions 17 and 17 swelled along 16 are formed. The raised portions 17, 17 of the outer film 15 are opposite to the portion corresponding to the cutting auxiliary line 16 (thinned portion), rather than the initial thickness (the thickness of the packaging material film that becomes the outer film 15). It is thick. Thereby, the depth of the auxiliary cutting line 16 is ensured in the outer film 15, and the strength on both sides of the auxiliary cutting line 16 is stronger than the other parts.

The inner film 10 and the outer film 15 are welded so as to surround the sheet-like food S in a state where they are overlapped via the sheet-like food S such as laver. Thereby, as for the packaging material 1 which concerns on this embodiment, the welding part (area | region which attached | subjected the dot in FIG. 1) by which the inner film 10 and the outer film 15 were welded mutually was formed over substantially the outer periphery. Yes. Further, the packaging material 1 is formed with notches for opening (notches serving as opening opening points) N at both ends in the longitudinal direction of the inner film 10 and the outer film 15 so as to correspond to the arrangement of the auxiliary cutting lines 11 and 16. Has been. The notch N is formed by overlapping notches 13 and 18 obtained by partially cutting the inner film 10 and the outer film 15. In the present embodiment, the notch N ( respective cutouts 13 and 18 of the inner film 10 and the outer film 15) is obtained by superimposing the inner film 10 and the outer film 15 and welding the outer peripheral ends to each other. , 15 are punched together.

The packaging material 1 according to the present embodiment has the above configuration, and subsequently, a packaging method and an opening method using the packaging material 1 having the above configuration will be described.

First, as shown in FIG. 2, the rice ball A is placed on the inner film 10, and the entire packaging material 1 is folded in the longitudinal direction so as to wrap the rice ball A. That is, the entire packaging material 1 is folded in the longitudinal direction so that both ends in the longitudinal direction of the inner film 10 overlap each other. Thus, by folding the packaging material 1 in half, both ends in the longitudinal direction of the inner film 10 overlap each other, and both ends in the short direction of the inner film 10 are folded back to one end in the longitudinal direction. It will be in the state where the other end side overlapped.

Then, as shown in FIG. 3, the end portions of the overlapping (opposing) inner films 10 are welded (sealed) by folding the entire packaging material 1 in two. At this time, both ends in the longitudinal direction of the inner film 10 are welded so as to include the entire notch N (notches 13 and 18) so that the inside and outside of the rice ball A are not communicated with each other. The notches 13 and 18 of the inner film 10 and the outer film 15 are formed so that the edges of the films 10 and 15 defining the notches 13 and 18 and the cutting auxiliary lines 11 and 16 are continuous. When the auxiliary cutting lines 11 and 16 are included in the region where the longitudinal ends of the inner film 10 are welded to each other, the openability is deteriorated. Therefore, the welding of the longitudinal ends of the inner film 10 is as much as possible. This is done so as not to include the auxiliary cutting lines 11 and 16.

And as above-mentioned, when the edge parts of the inner film 10 are welded, the packaging material 1 is the state which packaged the rice ball A in the state (isolated state) which separated the rice ball A and the sheet-like food S with the inner film 10. become.

In order to open the packaging material 1 in which the rice ball A is packaged, when the packaging material 1 is pulled in the short direction with both sides of the notch N (pulled so as to separate both sides of the notch N), the tensile force is notch N Concentrate on. Then, the notch N (the boundary (intersection) between the edge defining the notches 13 and 18 and the auxiliary cutting lines 11 and 16) is the starting point, and the inner film 10 and the outer film 15 are respectively connected to the auxiliary cutting lines 11 and 16. It will be torn along (cut).

The packaging material 1 according to the present embodiment is formed with raised portions 12, 12, 17, and 17 having increased strength on both sides of the cutting assisting lines 11 and 16 of the inner film 10 and the outer film 15 (FIG. 1 ( a))) When the inner film 10 and the outer film 15 are torn as described above, the tears (cutting lines) may pass over the raised portions 12, 12, 17, and 17 and come off from the cutting auxiliary lines 11 and 16. In other words, both the films 10 and 15 are cut cleanly along the cutting auxiliary lines 11 and 16. And each of the inner film 10 and the outer film 15 is cut | disconnected along the cutting auxiliary lines 11 and 16, and the whole packaging material 1 (the inner film 10 and the outer film 15) is isolate | separated in a transversal direction (2). Will be divided).

And as each of the inner film 10 and the outer film 15 is divided into two parts by pulling the packaging material 1 in the short direction as described above, one end side and the other end side of the packaging material 1 in the short direction. As a result, the inner film 10 divided into two is pulled out from between the rice ball A and the sheet-like food S. Thereby, the rice ball A and the sheet-like food S can be eaten together.

Next, a manufacturing facility for the packaging material 1 having facilities for forming the cutting auxiliary lines 11 and 16 for the film that becomes the inner film 10 and the film that becomes the outer film 15 will be described with reference to FIG.

The manufacturing facility 2 includes a transport path (hereinafter referred to as a transport path) for transporting a long film (hereinafter referred to as a first long film) F1 that is a continuous body of the outer film 15 in the longitudinal direction. R1 and a long film (hereinafter referred to as the second long film) F2 that is a continuum of the inner film 10 and a conveyance path (hereinafter referred to as this conveyance path) that conveys in the longitudinal direction. Is referred to as a second transport path) R2. On the 1st conveyance path | route R1, on the 1st elongate film F1, the cutting auxiliary line formation part (henceforth a 1st cutting auxiliary line formation part) 20a which forms the cutting auxiliary line 16 in the 1st elongate film F1, on the 1st elongate film F1 A food placing portion 21a for placing the sheet-like food S, a film polymerization portion 22a (22) for superimposing the second long film F2 on the first long film F1, and a second long length on the first long film F1. A film welding portion 23a (23) for welding the film F2 and the first long film F1 to which the second long film F2 is welded are cut into a predetermined size (length) together with the second long film F2 to form a single wafer. The film cutting part 24a (24) used as the packaging material 1 is provided.

And 1st conveyance path | route R1 which concerns on this embodiment is the 1st cutting auxiliary line formation part 20a, the food mounting part 21a, the film superposition | polymerization part 22a, and film welding from the upstream of the conveyance direction of the 1st elongate film F1. These are arranged in the order of the part 23a and the film cutting part 24a.

On the other hand, on the second transport path R2, a cutting auxiliary line forming part (hereinafter referred to as a second cutting auxiliary line forming part) 20b for forming the cutting auxiliary line 11 on the second long film F2, the second long line. A film superposition part 22b (22) for superimposing the first long film F1 on the film F2, a film welding part 23b (23) for welding the first long film F1 to the second long film F2, and a first long film A film cutting part 24b (24) for cutting the second long film F2 to which F1 is welded into a predetermined size (length) together with the first long film F1 to form a sheet-like packaging material 1 is provided. .

And the 2nd conveyance path | route R2 which concerns on this embodiment is the cutting auxiliary line formation part 20b, the film superposition | polymerization part 22b, the film welding part 23b, and the film cutting part 24b from the upstream of the conveyance direction of the 2nd long film F2. These are arranged in order.

That is, in the first transport path R1 and the second transport path R2, the first cutting assisting line forming part 20a and the second cutting assisting line forming part 20b are independent paths, respectively, and the film superposition part located on the downstream side thereof. 22 (22a, 22b), the film welded portion 23 (23a, 23b), and the film cutting portion 24 (24a, 24b) are formed to overlap each other, that is, to have a common configuration.

The first cutting auxiliary line forming part 20a and the second cutting auxiliary line forming part 20b are each formed into a groove-shaped cutting auxiliary line with respect to the long film (first long film F1, second long film F2) by ultrasonic waves. 11 and 16 are formed. That is, the first cutting auxiliary line forming part 20a forms the cutting auxiliary line 16 for the outer film 15 on the first long film F1 with ultrasonic waves, and the second cutting auxiliary line forming part 20b The auxiliary cutting line 11 for the inner film 10 is formed by ultrasonic waves on the length film F2.

Specifically, as shown in FIG. 5, the first cutting auxiliary line forming unit 20 a includes a horn 200 to which an ultrasonic wave with a predetermined frequency is applied, and a receiving member 210 disposed so as to face the horn 200. I have. The first cutting auxiliary line forming portion 20a melts the first long film F1 by applying an ultrasonic wave to the horn 200 in a state where the first long film F1 is sandwiched between the horn 200 and the receiving material 210. A groove-shaped cutting auxiliary line 16 is formed on the first long film F1.

The horn 200 includes a horn main body 201 to which an ultrasonic oscillator (not shown) is connected, and a first film contact portion 202 connected to the horn main body 201. The first film contact portion 202 is formed in a columnar shape, one end is connected to the horn body 201, and the other end surface is brought into contact with one surface of the first long film F1.

On the other hand, the receiving material 210 is formed so that the width of at least one direction of the tip portion (second film contact portion 212 to be described later) sandwiching the film together with the horn 200 becomes narrower toward the tip. More specifically, the receiving material 210 includes a receiving material main body 211 arranged at a fixed position, and the receiving material main body 211 on the first film contact portion 202 (first long film F1) side of the horn 200. And a projecting second film contact portion 212. The receiving material main body 211 is formed in a prismatic shape, and is arranged so that one of the four surfaces constituting the outer peripheral surface (four surfaces defining a square cross section) faces the first long film F1 side. Has been.

The second film contact portion 212 is continuously provided on the one surface facing the first long film F1 side of the receiving material body 211, and is formed to extend in the same direction as the receiving material body 211. Yes. The second film contact portion 212 according to the present embodiment is brought into contact with the other surface of the first long film F1 (the back surface of one surface of the first long film F1 that makes the first film contact portion 202 contact). It is the front-end | tip part of the receiving material 210, and is formed so that the width | variety of one direction orthogonal to a longitudinal direction (axial direction) may become narrow as it goes to a front-end | tip (horn 200 side).

That is, the second film contact portion 212 is formed in a triangular prism shape, and has three surfaces (triangular cross-sectional shapes) constituting the outer peripheral surface so as to match the longitudinal direction (axial direction) with the longitudinal direction of the material main body 211. Of the three surfaces) are connected to the one surface of the receiving material main body 211.

The second film contact portion (tip portion) 212 according to the present embodiment is formed such that both surfaces 212a and 212b in the width direction form an obtuse angle. That is, the second film contact portion 212 according to the present embodiment is configured such that two surfaces (both surfaces in the width direction) 212a and 212b other than the one surface connected to the receiving material body 211 move from the receiving material body 211 side toward the tip. It is composed of an inclined surface that approaches, and the internal angle θ of both the inclined surfaces 212a and 212b is set to an obtuse angle. The extending amounts of both surfaces (both inclined surfaces) 212a and 212b in the width direction are set to be substantially the same. Thereby, the 2nd film contact part 212 which concerns on this embodiment is a cross-sectional substantially isosceles triangle. Note that the second film contact portion 212 according to the present embodiment has a band-like surface formed by connecting the tips of both sides 212a and 212b in the width direction, but the width-wise dimension of the band-like surface is very large. Since it is small, the cross-sectional shape is substantially triangular.

In the present embodiment, the first cutting auxiliary line forming portion 20a extends the cutting auxiliary line 16 in a direction (short direction) perpendicular to the longitudinal direction of the first long film F1 with respect to the first long film F1. It comes to form. Therefore, the receiving material 210 is arranged so that the longitudinal direction coincides with the short direction of the first long film F1. That is, the receiving material 210 is disposed such that the ridge line at the front end portion (the ridge line formed at the front end by connecting both sides 212a and 212b in the width direction) extends in the short direction of the first long film F1. . The 1st cutting auxiliary line formation part 20a which concerns on this embodiment forms the cutting auxiliary line 16 over the full length of a transversal direction with respect to the 1st long film F1. Therefore, the receiving material 210 has at least a length in the longitudinal direction of the second film contact portion 212 (ridge line of the tip end portion 212) equal to or longer than a length (width dimension) in the short direction of the first long film F1. Is set.

And since the 1st cutting auxiliary line formation part 20a is set more than the length of the transversal direction of the 1st long film F1, the length of the longitudinal direction of the receiving material 210 (2nd film contact part 212) is set, The horn 200 is provided so as to be able to reciprocate in the direction in which the ridge line (tip) formed at the tip of the receiving material 210 (second film contact portion 212) extends (short direction of the first long film F1). Yes. That is, the horn 200 moves along the tip (top) of the second film contact portion 212.

As shown in FIGS. 4 and 6, the first cutting auxiliary line forming portion 20 a according to the present embodiment has a distal end portion of the receiving member 210 with respect to the first long film F <b> 1 sandwiched between the horn 200 and the receiving member 210. A tension T is applied in a direction orthogonal to the width direction of 212. That is, the first auxiliary cutting line forming portion 20a further includes a tension generator 230 that applies a tension T in the short direction to the first long film F1 in accordance with the arrangement of the receiving member 210 and the horn 200. I have. The tension generator 230 includes a pair of gripping means 231 and 232 for gripping both ends of the first long film F1 in the short direction.

Each gripping means 231 and 232 is configured to be able to grip the end of the first long film F1 at two locations. That is, each holding means 231 and 232 has a pair of holding portions 231a, 231b, 232a, and 232b provided at predetermined intervals in the longitudinal direction of the first long film F1, and both holding portions 231a, The horn 200 and the receiving material 210 (second film contact portion 212) can be arranged between 231b, 232a, and 232b. The pair of gripping portions 231a, 231b, 232a, and 232b grip the end portions of the first long film F1 on both sides of the planned position where the auxiliary cutting line 16 is formed.

The first cutting auxiliary line forming portion 20a having the above-described configuration is configured such that the first long film F1 is received by the tension generator 230 while the first long film F1 is sandwiched between the horn 200 and the receiving material 210. The ultrasonic wave is applied to the horn 200 while applying a tension T in a direction orthogonal to the width direction of the second film contact portion (tip portion) 212, and the width of the tip portion of the receiving material 210 is placed on the first long film F1. The auxiliary cutting line 16 extending in the direction orthogonal to the direction is formed.

That is, the first cutting auxiliary line forming portion 20 a having the above-described configuration is a first long film formed by the first film contact portion 202 (other end surface) of the horn 200 and the second film contact portion (tip end portion) 212 of the receiving material 210. While sandwiching F1, the tension generator 230 applies a tension T in the short direction to the first long film F1, and in this state the horn 200 is applied to the second film contact portion while applying ultrasonic waves to the horn 200. By moving along the top part (ridge line) of 212, the cutting auxiliary line 16 extended in a transversal direction is formed on the 1st elongate film F1.

In addition, the 2nd cutting auxiliary line formation part 20b which concerns on this embodiment is set as the same structure as the 1st cutting auxiliary line formation part 20a. Therefore, the description of the second cutting auxiliary line forming portion 20b will be referred to the above description of the first cutting auxiliary line forming portion 20a and FIGS. 4 to 7, and will be omitted here.

As shown in FIG. 4, the food placing portion 21a on the first transport path R1 arranges the sheet-like food S on the cutting auxiliary line 16 formed by the first cutting auxiliary line forming portion 20a. . The film superposition part 22 (22a, 22b), the film welding part 23 (23a, 23b), and the film cutting part 24 (24a, 24b) of the first transport path R1 and the second transport path R2 are as described above. This is a common configuration for the path R1 and the second transport path R2, and the film superposition unit 22 includes the first transport path R1 and the second transport path R2 on the downstream side of the food placing part 21a on the first transport path R1. By overlapping, the 1st long film F1 and the 2nd long film F2 conveyed on both path | route R1, R2 overlap through the sheet-like food S.

The film welded portion 23 is formed between the first long film F1 and the second long film F2 that are transported on the overlapping first transport path R1 and second transport path R2 (overlapped first and second long paths). The first long film F1 and the second long film F2 are welded so as to surround the sheet-like food S interposed between the long films F2. The said film cutting part 24 (24a, 24b) comes to cut | disconnect the area | region (area | region surrounding the sheet-like food S) where the 1st elongate film F1 and the 2nd elongate film F2 were welded as the packaging material 1. FIG. ing. Moreover, when cutting the area | region surrounding the sheet-like food S, the film cutting part 24 which concerns on this embodiment cuts off the part corresponding to the both ends of the cutting auxiliary lines 11 and 16, and notch N (notch 13 and 18). Is supposed to form.

Next, the manufacturing method (cutting auxiliary line forming method) of the packaging material 1 according to the present embodiment will be described. The manufacturing equipment 2 used in this manufacturing method is as described above, and transports the first long film F1 on the first transport path R1 and transports the second long film F2 on the second transport path R2. To do. In this embodiment, while forming the cutting auxiliary line 16 with respect to the 1st long film F1 with the 1st cutting auxiliary line formation part 20a, with respect to the 2nd long film F2 with the 2nd cutting auxiliary line formation part 20b. In order to form the cutting auxiliary line 11, the first long film F1 is intermittently conveyed in the first conveyance path R1, and the second long film F2 is intermittently conveyed in the second conveyance path R2. That is, the first long film F1 is conveyed so as to pause for a predetermined time every time it moves by a predetermined amount, and the second long film F2 is also conveyed so as to pause for a predetermined time every time it moves by a predetermined amount. .

And in the 1st cutting auxiliary line formation part 20a, as shown in FIG. 6, the cutting auxiliary line 16 is formed with respect to the 1st elongate film F1 currently stopped temporarily. Moreover, also in the 2nd cutting auxiliary line formation part 20b, the cutting auxiliary line 11 is formed with respect to the 2nd long film F2 currently suspended.

Here, a description will be given of a method for forming the auxiliary cutting lines 11 and 16 for the long films (the first long film F1 and the second long film F2). The long film F1 stopped by the receiving material 210 and the horn 200. , F2 in a state where the tension generating device 230 applies the tension T to the long films F1 and F2 and generates ultrasonic waves on the horn 200, so that the receiving material 210 is passed through the long films F1 and F2. As a result of the transmission of the ultrasonic waves, as shown in FIG. 7A, the vibration energy becomes heat and the long films F1 and F2 melt along the second film contact portion (tip portion) 212 of the receiving material 210. Become. At the same time, the melted portions of the long films F1 and F2 are pushed away to both sides (both sides in the width direction) of the receiving material 210 (second film contact portion 212) to be raised.

In the present embodiment, as described above, since the tension T is applied in the short direction of the long films F1 and F2, the long films F1 and F2 are formed as shown in FIG. In the longitudinal direction, a force is exerted to approach the point of application of tension T (scheduled position for forming auxiliary cutting lines 11 and 16). In particular, in the present embodiment, a partial tension T is applied to the long films F1 and F2. Therefore, the long films F1 and F2 have gripping portions 231a of the gripping means 231 and 232, respectively. , 231b, 232a, 232b, a force to approach the imaginary line (not shown) side is locally applied.

As a result, the portions (the raised portions 12, 12, 17, and 17) pushed away on both sides by the receiving material 210 (second film contact portion 212) approach each other, and as shown in FIG. The long and deep groove-shaped cutting auxiliary lines 11 and 16 are formed between the raised portions 12, 12, 17, and 17 without extending the distance between the portions 12, 12, 17, and 17. . That is, the raised portions 12, 12, 17, and 17 that are pushed away from both sides of the distal end portion 212 by the distal end portion 212 of the receiving member 210 and are raised from the surroundings approach each other (see FIG. 7B), Between the ridges 12, 12, 17, 17 are the elongated groove-shaped cutting auxiliary lines 11, 16. As a result, the depth of the cutting auxiliary lines 11 and 16 corresponds to the rising of the raised portions 12, 12, 17, and 17, and the cutting auxiliary lines 11 and 16 are in a groove shape in which the depth is sufficiently secured. Become.

As described above, by forming the auxiliary cutting lines 11 and 16 while intermittently moving the long films F1 and F2, the long films F1 and F2 are formed at predetermined intervals in the longitudinal direction as shown in FIG. Cutting auxiliary lines 11 and 16 are formed. And since the 1st elongate film F1 is intermittently conveyed on 1st conveyance path | route R1, when the cutting auxiliary line 16 is formed in the upstream 1st cutting auxiliary line formation part 20a, it forms previously. The cut auxiliary line 16 thus made reaches the food placing portion 21a. And in the food mounting part 21a, the sheet-like food S is mounted corresponding to arrangement | positioning of the cutting assistance line 16 of the 1st elongate film F1. Accordingly, since the first long film F1 is intermittently transported, the sheet-like food S is placed corresponding to the cutting auxiliary lines 16 that are sequentially sent in the food placing portion 21a. On the first long film F1 in one conveyance path R1, the sheet-like food S is arranged with a gap in the longitudinal direction.

And in the film superposition | polymerization part 22 (22a, 22b), the 2nd long film F2 is piled up on the 1st long film F1. At this time, the second long film F2 is overlaid on the first long film F1 so that the cutting auxiliary line 16 of the first long film F1 and the cutting auxiliary line 11 of the second long film F2 coincide. The Thus, by supplying the second long film F2 that becomes the inner film 10 on the first long film F1 that becomes the outer film 15, the first long film F1 and the second long film F2 It will be in the state by which the sheet-like food S was arrange | positioned in between.

And in the film welding part 23 (23a, 23b), the 1st long film F1 and the 2nd long film F2 which were piled up are welded so that the sheet-like food S may be surrounded. That is, the first long film F1 and the second long film F2 are welded so as to surround the sheet-like food S in the square region. In the film welding portion 23 (23a, 23b), the long films F1, F2 may be welded together by laser welding or heat sealing bar, but in this embodiment, ultrasonic sealing is used. Thus, the long films F1 and F2 are welded together.

And the 1st long film F1 and the 2nd long film F2 which were welded and united by the film cutting part 24 (24a, 24b) are cut | disconnected. That is, a region where the first long film F <b> 1 and the second long film F <b> 2 are welded (region surrounding the sheet-like food S) is cut off as the packaging material 1. Moreover, in the film cutting part 24 (24a, 24b) which concerns on this embodiment, when cut | disconnecting the area | region surrounding the sheet-like food S, the part corresponding to the both ends of the cutting | disconnection auxiliary lines 11 and 16 is notched, and notch N (cutting) Notches 13, 18) are formed. Thereby, the packaging material 1 of the said structure is completed.

As described above, according to the cutting auxiliary line forming method according to the present embodiment, the receiving material 210 has a front end portion that sandwiches the films (long films) F1 and F2 that constitute one configuration of the packaging material 1 together with the horn 200. The width of at least one direction is narrower toward the tip, and is perpendicular to the width direction of the tip of the receiving member 210 with respect to the films (long films) F1 and F2 sandwiched between the horn 200 and the receiving member 210. A direction that is orthogonal to the width direction of the front end portion (second film contact portion 212) of the receiving material 210 on the films (long film) F1 and F2 while applying a tension T in the direction to be applied. Since the auxiliary cutting lines 11 and 16 extending in the direction are formed, the auxiliary cutting line 1 that can be cut on a predetermined line regardless of the thickness of the films F1 and F2 that constitute one configuration of the packaging material 1. , An excellent effect such can form 16 on the film F1, F2. Therefore, when the films F1 and F2 have a configuration of the packaging material 1, the packaging material 1 can be cut in a good manner along the auxiliary cutting lines 11 and 16, so that the packaging material 1 that can be satisfactorily opened can be obtained. Can be produced.

Furthermore, since the front-end | tip part (2nd film contact part 212) of the said receiving material 210 is formed so that the width | variety of one direction goes to a front-end | tip so that both surfaces 212a and 212b in a width direction may make an obtuse angle. When the auxiliary cutting lines 11 and 16 are formed, the films F1 and F2 can be prevented from being carelessly cut.

Further, by forming the front end portion (second film contact portion 212) of the receiving material 210 at an obtuse angle, the front end portion 212 of the receiving material 210 is melted by sandwiching the films F1 and F2 between the receiving material 210 and the horn 200. As a result, the amount of the bulging portions 12, 12, 17, and 17 can be increased. Accordingly, the depth of the auxiliary cutting lines 11 and 16 can be secured and the strength of both sides of the auxiliary cutting lines 11 and 16 can be further increased, and the films F1 and F2 can be more reliably aligned with the auxiliary cutting lines 11 and 16. Can be cut.

Then, the long films F1 and F2 are intermittently conveyed in the longitudinal direction, and the long films F1 and F2 in a stopped state are arranged so that the width direction of the leading end corresponds to the longitudinal direction of the long films F1 and F2. An ultrasonic wave is applied to the horn 200 while applying a tension T in a direction perpendicular to the longitudinal direction to the long films F1 and F2 which are sandwiched between the receiving material 210 and the horn 200 and are in the stopped state, and the long film F1. , F2 are formed so as to extend in a direction orthogonal to the longitudinal direction of F2, so that the cutting auxiliary lines 11, 16 are formed so as to extend in a direction orthogonal to the transport direction of the films F1, F2. Also, it is possible to prevent the films F1 and F2 from being torn during conveyance (during manufacture). Thereby, since the selectivity of the supply pattern of film F1, F2 increases, it can respond to various forms of packaging.

Next, a second embodiment of the present invention will be described. In the present embodiment, a case where a cutting auxiliary line is formed on a film serving as a packaging material used in an automatic packaging machine that automatically performs pillow packaging will be described as an example.

First, the pillow packaging will be schematically described. In the pillow packaging, as shown in FIG. 8, the film F is rolled into a cylinder so as to wrap the food A ′, and the ends of the overlapping films F are welded to each other. As a packaging material 1 ′ in which the film F is shaped like a pillow by welding both ends of the cylindrical film F in a flat shape so as to close the openings at both ends of the film F in a shape The food A ′ is packaged.

In the present embodiment, the cylindrical film F (packaging material 1 ′) is provided with a cutting auxiliary line 11 ′ extending in the circumferential direction, and the packaging material 1 ′ is cut along the cutting auxiliary line 11 ′. Then, the pillow packaging which cut off the one end side or other end side of this packaging material 1 'so that foodstuff A' can be taken out is made into object.

An outline of an automatic packaging machine that automatically performs such pillow packaging will be described. As shown in FIG. 9, the automatic packaging machine 2 ′ includes a conveyance path R that conveys the long film F in the longitudinal direction. On the transport path R, a cutting auxiliary line forming portion 20 ′ for forming the cutting auxiliary line 11 ′ on the long film F, a food placing portion 21 ′ for placing the food A ′ on the long film F, a long A film that separates the food packaging part 22 'that wraps the food A' on the long film F with the long film F and the region that wraps the food A 'on the long film F as a packaging material 1' that wraps the food A '. A cutting portion 24 'is provided.

And the conveyance path | route R which concerns on this embodiment is the cutting auxiliary line formation part 20 ', the food mounting part 21', the food packaging part 22 ', and the film cutting part 24' from the upstream of the conveyance direction of the long film F. These are arranged in this order.

The cutting auxiliary line forming part 20 'has the same configuration as the first cutting auxiliary line forming part 20a (and the second cutting auxiliary line forming part 20b) of the first embodiment. Accordingly, here, the description of the first cutting auxiliary line forming portion 20a of the first embodiment and FIGS. 5 to 7 will be referred to, and the same name and the same reference numeral will be used for the same configuration as the first cutting auxiliary line forming portion 20a. A description of the auxiliary cutting line forming portion 20 ′ of this embodiment will be omitted.

As shown in FIG. 9, the food placing portion 21 ′ places the food A ′ on the long film F so as to correspond to the arrangement of the cutting auxiliary line 11 ′ formed by the cutting auxiliary line forming portion 20 ′. It is supposed to be placed. And the said food packaging part 22 'rounds the long film F to a short direction so that food A' may be wrapped, and while welding both ends of the short direction of this long film F, Both sides of the food A ′ in the longitudinal direction of the long film F are flattened so as to close the inner space of the long film F in a cylindrical shape, and the periphery of the food A ′ is covered with the long film F It is supposed to be in the state. And the film cutting part 24 'cut | disconnects the area | region (area | region which became a form like a pillow) which covered the circumference | surroundings of the food A' of the long film F as a packaging material 1 '. Although not specifically mentioned, the automatic wrapping machine 2 ′ is provided at a stage subsequent to the cutting assisting line forming part 20 ′ and preceding the film welding part 23 ′ (in this embodiment, following the cutting assisting line forming part 20 ′. In addition, in the front stage of the food placing portion 21 ′), corresponding to the arrangement of the cutting auxiliary line 11 ′, a part of both ends in the short direction of the long film F is cut out so that the cutouts 13 ′ and 13 ′ are formed. It comes to form.

Next, the process of pillow packaging (cutting auxiliary line forming method) by the automatic packaging machine 2 'will be described. The automatic packaging machine 2 ′ is as described above, and first transports the long film F on the transport path R. In this embodiment, since the cutting auxiliary line 11 ′ is formed on the long film F by the cutting auxiliary line forming unit 20 ′, the long film F is intermittently conveyed on the conveyance path R. That is, the long film F is conveyed so as to pause for a predetermined time every time it moves a predetermined amount.

And in the cutting auxiliary line formation part 20 ', the cutting auxiliary line 11' is formed with respect to the long film F currently suspended. Here, a method for forming the cutting auxiliary line 11 ′ on the long film F will be described with reference to FIG. 6. A tension generator in a state where the long film F being stopped is sandwiched between the receiving member 210 and the horn 200. As shown in FIG. 7A, the ultrasonic wave is transmitted to the receiving material 210 through the long film F by generating ultrasonic waves in the horn 200 while applying the tension T to the long film F at 230. The vibration energy becomes heat and the long film F is melted along the second film contact portion (tip portion) 212 of the receiving material 210. At the same time, the melted portion of the long film F is pushed up to both sides (both sides in the width direction) of the receiving material 210 (second film contact portion 212) to be raised.

In the present embodiment, as described above, since the tension T is applied in the short direction of the long film F, as shown in FIG. A force to approach the point of action of tension T (scheduled position for forming auxiliary cutting line 11 ′) acts. In particular, in the present embodiment, since a partial tension T is applied to the long film F, the long film F has grip portions 231a, 231b, and 232a of the grip means 231 and 232. , 232b, a force to approach the imaginary line (not shown) side acts locally.

As a result, the portions (the raised portions 12 ′ and 12 ′) pushed away on both sides by the receiving material 210 (second film contact portion 212) approach each other, and as shown in FIG. 8, the raised portions 12 ′ and 12 A long and deep groove-like cutting auxiliary line 11 ′ is formed between the raised portions 12 ′ and 12 ′ without extending the interval between them. That is, the raised portions 12 ′ and 12 ′ which are pushed away by the distal end portion 212 of the receiving member 210 to the opposite sides of the distal end portion 212 and rise more than the surroundings approach each other (see FIG. 7B). Between 12 'and 12' becomes the elongate groove-shaped cutting auxiliary line 11 '. As a result, the depth of the cutting auxiliary line 11 ′ corresponds to the rising of the raised portions 12 ′ and 12 ′, and the cutting auxiliary line 11 ′ has a groove shape with a sufficient depth.

Then, as described above, by forming the auxiliary cutting line 11 ′ while intermittently moving the long film F, as shown in FIG. 9, the auxiliary film 11 ′ is cut at predetermined intervals in the longitudinal direction on the long film F. Will be formed. And since the long film F is intermittently conveyed on the conveyance path | route R, when the auxiliary cutting line 11 'is formed in the upstream auxiliary cutting line formation part 20', the cutting assistance previously formed is formed. The line 11 ′ has reached the food placing portion 21 ′. Then, the food A ′ is placed in the food placing portion 21 ′ corresponding to the arrangement of the cutting auxiliary lines 11 ′ of the long film F. Accordingly, since the long film F is intermittently transported, the food A ′ is placed corresponding to the cutting auxiliary lines 11 ′ that are sequentially sent in the food placing portion 21 ′. On the long film F on R, the food A ′ is arranged at intervals in the longitudinal direction.

And in food packaging part 22 ', long film F is wound in the transversal direction so that food A' on long film F may be wrapped, and both ends of the transversal direction of long film F are welded together. Will be. Thereby, the long film F becomes a cylindrical shape in a state of surrounding the food A ′. In this state, the notches 13 'and 13' formed at both ends in the short direction of the long film F are overlapped to form a notch N 'as an opening start point. Next, the tubular long film F is flattened at a position spaced in the longitudinal direction so that the food A ′ (cutting auxiliary line 11 ′) is interposed, and the opposing portions are welded together. . Then, in the film cutting part 24 ′, the region of the long film F that encloses the food A ′ is cut off as the packaging material 1 ′, and the pillow packaging is completed.

In order to open the packaging material 1 ′ wrapped with the food A ′ in this way, as shown in FIG. 8, when both sides of the notch N ′ (notches 13 ′ and 13 ′) are pulled, the notch N ′ is the starting point. The packaging material 1 ′ (film F) starts to be cut along the cutting auxiliary line 11 ′. As described above, since the strength of the packaging material 1 ′ (film F) is increased by the raised portions 12 ′ and 12 ′ on both sides of the cutting assisting line 11 ′, it is neatly cut along the cutting assisting line 11 ′. Will be. And as a result of separating (dividing into two) the packaging material 1 ′ (film F) along the cutting auxiliary line 11 ′, it is possible to take out the food A ′ contained therein and eat it. Become.

As described above, also in the present embodiment, since the same cutting auxiliary line forming method as that in the first embodiment is adopted, it is related to the thickness of the film F serving as the packaging material 1 ′ as in the first embodiment. The cutting auxiliary line 11 ′ that can be cut on a predetermined line can be formed on the film. Accordingly, when the film F becomes the packaging material 1 ′, the packaging material 1 ′ can be cut along the auxiliary cutting line 11 ′ in good appearance, and therefore, a packaging material 1 ′ that can be opened well is produced. Can do.

Note that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

In each of the above embodiments, the auxiliary cutting lines 11, 11 ′, 16 are formed on the films F, F1, F2 in the manufacturing process of the packaging material 1 and the packaging process of the food A ′. However, the present invention is not limited to this. Instead, for example, for the long film F as the packaging material 1 ′ or the long films F <b> 1 and F <b> 2 as one configuration of the packaging material 1, the cutting auxiliary line forming method described in the above embodiments is used in advance. The auxiliary cutting lines 11, 11 ′, 16 may be formed, and the long films F, F 1, F 2 may be used when the packaging material 1 is manufactured or when the food A is packaged.

Moreover, the cutting auxiliary line formation method demonstrated by said each embodiment is the film F1, F2 used as one structure of the packaging material 1, and the film F as packaging material 1 'for pillow packaging, and the cutting auxiliary line 11, 11'. , 16 is not limited to the above, and the cutting auxiliary line 11 is applied to a packaging material for packaging a triangular sandwich, a packaging material for packaging hand-rolled sushi, or a film constituting one of these packaging materials. , 11 ', 16 may be used when forming.

In each of the above embodiments, the horn 200 is disposed on one surface side of the long films F, F1, and F2, and the receiving material 210 is disposed on the other surface side of the long films F, F1, and F2. For example, the horn 200 is disposed on the other surface side of the long films F, F1, and F2, and the receiving material 210 is disposed on the one surface side of the long films F, F1, and F2. You may make it do. That is, as long as the horn 200 and the receiving material 210 can sandwich the long films F, F1, and F2, any of them may be arranged on one surface side or the other surface side of the long films F, F1, and F2. .

In each of the embodiments described above, the fixed type receiving material 210 extending in the short direction of the long films F, F1, and F2 is adopted. However, the present invention is not limited to this, and for example, as shown in FIG. 210 may be a rotary type (so-called ring). That is, the receiving material 210 may be provided so as to be rotatable around an axis (not shown) extending in the longitudinal direction of the long film F. In this case, since the receiving material (ring) 210 has a portion corresponding to the second film contact portion 212 formed over the entire outer periphery, the longitudinal length of the long films F, F1, and F2 at the tip portion thereof. The width in a direction (one direction) that coincides with the direction may be formed narrower (to taper) toward the outer peripheral end (tip). Even in this case, the cutting auxiliary lines 11 and 16 are properly formed, and appropriate raised portions 12, 12, 12 ′, 12 ′, 17, and 17 are formed on both sides of the cutting auxiliary lines 11, 11 ′, and 16. As formed, it is preferable that the front end portion of the receiving member 210 is formed such that the both sides 212a and 212b in the width direction form an obtuse angle. However, in the case of forming the cutting auxiliary lines 11, 11 ′, 16 extending in the short direction of the long film F with the ring type receiving material 210, the receiving material 210 together with the horn 200, as in the above embodiments. Therefore, when forming the auxiliary cutting lines 11, 11 ′, 16 extending in the short direction of the long film F, it is necessary to move them in the short direction of the long film F. It is preferable to employ the material 210.

Moreover, in each said embodiment, although it formed so that only the width | variety of one direction of the front-end | tip part (2nd film contact part 212) of the receiving material 210 might become narrow toward a front-end | tip, it is not limited to this. For example, the front end portion of the receiving member 210 may be formed so as to become narrower toward the front end in another direction orthogonal to the one direction. Even in this case, it goes without saying that the width in one direction becomes narrower as it goes toward the tip, and it is of course preferable that the inner angle θ of both surfaces 212a and 212b in the width direction be made obtuse. It is.

In each of the above embodiments, the long films F, F1, F2 are intermittently conveyed in the longitudinal direction, and the auxiliary cutting lines 11, 11 ′, extending in the short direction with respect to the stopped long films F, F1, F2, However, the present invention is not limited to this. For example, as shown in FIG. 11, the long film F, F1, and F2 are continuously conveyed in the longitudinal direction while the long film F is formed. , F1 and F2 may be formed with auxiliary cutting lines 11, 11 ′, 16 extending in the longitudinal direction (conveying direction).

Specifically, the receiving material 210 is disposed so that the width direction coincides with the direction orthogonal to the longitudinal direction of the long films F, F1, and F2, and the long film being conveyed by the receiving material 210 and the horn 200 is used. Extending in the longitudinal direction by applying an ultrasonic wave to the horn 200 while applying a tension T in the longitudinal direction to the long films F, F1, F2 by sandwiching the approximate center in the short direction of F, F1, F2 The cutting auxiliary lines 11, 11 ′, 16 may be formed. Even in this case, the long film F, F1, F2 is conveyed in the longitudinal direction so that the tension T acts on the long film F, F1, F2 in the longitudinal direction, so that the tip of the receiving material 210 The raised portions 12, 12, 12 ′, 12 ′, 17, and 17 that are pushed away on both sides of the portion 212 approach the inner side (center side) in the short direction of the long film F and approach each other. , 12, 12 ′, 12 ′, 17, and 17 are formed as long and deep groove-like cutting auxiliary lines 11, 11 ′, and 16 (see FIG. 7).

As described above, when forming the auxiliary cutting lines 11, 11 ′, 16 extending in the same direction as the longitudinal direction (conveying direction) of the long films F, F 1, F 2, the receiving material 210 is the long film F. It is preferable to adopt a ring type that can be rotated with conveyance. In this case, the receiving material 210 may be arranged so that the width direction (one direction) coincides with the short direction of the long films F, F1, and F2. By doing in this way, the long films F, F1, and F2 are continuously conveyed in the longitudinal direction, whereby the receiving material 210 rotates around the axis and the distal end portion 212 of the cutting auxiliary line 11 and 11 extends in the longitudinal direction. While forming ', 16, ridges 12, 12, 12', 12 ', 17, 17 having increased strength are formed on both sides of the auxiliary cutting lines 11, 11', 16.

Even in this case, the tension T in the direction orthogonal to the width direction of the receiving member 210 is applied. In this case, instead of the tension generator 230 employed in each of the above embodiments, the long films F, F1, Two pairs of roller pairs (not shown) for pressure-fitting and conveying F2 are arranged at intervals in the longitudinal direction (conveying direction) of the long films F, F1, and F2 so that the horn 200 and the receiving material 210 are interposed. The pair of rollers disposed on the downstream side of the pair of rollers disposed on the upstream side in the transport direction of the films F, F1, and F2 can be driven at high speed, or the long films F, F1, and F2 can be transported. The other roller pair disposed on the downstream side in the direction may be rotationally driven and rotational resistance may be applied to the one roller pair disposed on the upstream side. By doing in this way, when applying an ultrasonic wave to the horn 200, the tension | tensile_strength T can be made to act on elongate film F, F1, F2.

And it is preferable that the two pairs of rollers do not press the entire width of the long films F, F1, and F2, but partially press the long films F, F1, and F2. In this way, as in the above embodiments, the partial tension T acts on the long films F, F1, and F2 in a concentrated manner, so that the auxiliary cutting lines 11, 11 ′, and 16 are formed. At this time, the raised portions 12, 12, 12 ′, 12 ′, 17, 17 pushed away on both sides of the tip end portion 212 of the receiving member 210 come to approach each other efficiently, and the raised portions 12, 12, 12 ′. , 12 ′, 17, 17 can be formed into elongated and deep groove-shaped cutting auxiliary lines 11, 11 ′, 16.

And in order to manufacture the packaging material 1 similar to said 1st embodiment on the assumption that the longitudinal auxiliary cutting lines 11, 11 ', and 16 are formed in long film F, F1, F2 in this way, For example, as shown in FIG. 12 (a), an auxiliary cutting line 16 extending in the longitudinal direction of the first long film F1 is formed on the first long film F1 to be the outer film 15, and the inner film 10 is formed. For the second long film F2, the auxiliary cutting line 11 extending in the longitudinal direction of the second long film F2 is formed, and the auxiliary cutting line 16 of the first long film F1 and the second long film F2 are cut. The first long film F1 and the second long film F2 are conveyed in the same direction and overlapped so that the auxiliary line 11 coincides. And after welding both long film F1, F2 so that the sheet-like food S interposed between the 1st long film F1 and the 2nd long film F2 may be surrounded, integral of both long film F1, F2 What is necessary is just to cut | disconnect the area | region (area | region used as the packaging material 1) used as the packaging material 1. FIG.

Further, when the auxiliary cutting line 16 similar to that of the above embodiment is formed on the outer film 20 and the inner film 10 is constituted by a pair of films arranged side by side so that the inner film 10 can be separated in the width direction. 12 (b), on the first long film F1 to be the outer film 15, a cutting auxiliary line 16 extending in the longitudinal direction of the first long film F1 is formed and the inner film 10 is formed. The second long film F2 is composed of a pair of strip-like films F2a and F2b arranged side by side in the short direction, and a center line (a pair of strip-like films F2a) extending in the longitudinal direction of the second long film F2. , F2b end portions overlap each other) the first long film F1 and the second long film F2 so that the auxiliary cutting line 16 formed on the first long film F1 coincides. Superimposed and conveyed in the direction. And after welding both long film F1, F2 so that the sheet-like food S interposed between the 1st long film F1 and the 2nd long film F2 may be surrounded, integral of both long film F1, F2 What is necessary is just to cut | disconnect the area | region (area | region used as the packaging material 1) used as the packaging material 1. FIG.

Moreover, as shown to Fig.13 (a), the cutting auxiliary line extended in a transversal direction with respect to either one of the 1st long film F1 or the 2nd long film F2 (1st long film F1 in a figure). 11 and 16 may be formed, and the auxiliary cutting lines 11 and 16 extending in the longitudinal direction with respect to the other (second long film F2 in the drawing) may be formed. In this case, the first long film F1 and the second long film F2 are transported (supplied) in directions orthogonal to each other, and the first long film F1 and the second long film F1 and the second long film F1 are aligned so that the mutual cutting auxiliary lines 11 and 16 coincide. The long film F <b> 2 is overlapped, and both the long films F <b> 1 and F <b> 2 are welded so as to surround the sheet-like food S, and then the region may be separated as the packaging material 1. Further, as shown in FIG. 13B, the auxiliary cutting line 16 extending in the short direction is formed with respect to the first long film F1, and the second long film F2 is paired with the pair of strip films F2a and F2b as described above. You may comprise. In this case, the first long film F1 and the second long film F2 are transported (supplied) in directions orthogonal to each other, and the length of the second long film F with respect to the auxiliary cutting line 16 of the first long film F1. The first long film F1 and the second long film F2 are overlapped so that the center line extending in the direction (the overlapping end portions of the pair of band-like films F2a and F2b) coincides with each other so as to surround the sheet-like food S. What is necessary is just to cut | disconnect the said area | region as the packaging material 1 after welding both long film F1, F2.

And in order to carry out pillow wrapping on the assumption that the longitudinal cutting auxiliary lines 11, 11 ', 16 are formed on the long films F, F1, F2, the cutting auxiliary lines extending in the longitudinal direction with respect to the long film F. 11 'is formed, food A' is placed on the long film F, and then the long film F is rolled in the lateral direction or the longitudinal direction so as to wrap the food A 'into a tubular shape and open. The welded portion may be welded and closed. In this case, by winding the long film F in the short direction and wrapping the food A ′, the cutting auxiliary line 11 ′ extending in the axial direction of the cylindrical packaging material 1 ′ is formed, and the long film F is elongated. By winding in the direction and packaging the food A ′, the auxiliary cutting line 11 ′ extending in the circumferential direction of the cylindrical packaging material 1 ′ is formed. Therefore, the cutting auxiliary line 11 ′ can be provided so as to have an opened form corresponding to the form of the food A to be packaged.

In each of the embodiments described above, the auxiliary cutting lines 11, 11 ′, 16 are formed for the long films F, F1, F2, but the present invention is not limited thereto. For example, the packaging materials 1, 1 It goes without saying that the auxiliary cutting lines 11, 11 ′ and 16 may be formed for the whole or a sheet-like film which is one configuration of the packaging material 1. Even in this case, the film F, F1, and F2 sandwiched between the horn 200 and the receiving member 210 are superposed on the horn 200 while applying a tension T in a direction perpendicular to the width direction of the front end portion of the receiving member 210. A sound wave may be applied to form auxiliary cutting lines 11, 11 ′, 16 extending in a direction perpendicular to the width direction of the front end portion of the receiving member 210 on the films F, F1, F2.

In said 1st embodiment, the sheet-like food S is arrange | positioned on the 1st long film F1 used as the outer film 15, and the 2nd long film F2 used as the inner film 10 is piled up on this 1st long film F1. Although it was made, it is not limited to this, For example, after arrange | positioning the sheet-like food S on the 2nd elongate film F2 used as the inner film 10, the outer film 15 and the 2nd elongate film F2 Of course, the first long film F1 may be overlapped.

DESCRIPTION OF SYMBOLS 1 ... Packaging material (wrapping material for cooked rice foods), 1 '... Packaging material (wrapping material for pillow packaging), 2 ... Production equipment, 2' ... Automatic packaging machine, 10 ... Inner film (film), 11, 16 ... Auxiliary cutting line, 12, 12 ', 17 ... raised portion, 13, 18 ... notch, 15 ... outer film, 20' ... cutting auxiliary line forming portion, 20a ... first cutting auxiliary line forming portion (cutting auxiliary line forming portion) ), 20b ... second cutting auxiliary line forming part (cutting auxiliary line forming part), 21 '... food placing part, 21a ... food placing part, 22, 22a, 22b ... film polymerization part, 22' ... food packaging part , 23, 23a, 23b ... film welded portion, 24, 24a, 24b ... film cutting portion, 200 ... horn, 201 ... horn body, 202 ... first film contact portion, 210 ... receiving material, 211 ... receiving material body, 212 ... Second film contact part, 212a, 2 2b ... surface (inclined surface), 230 ... tension generator, 231, 232 ... gripping means, 231a, 231b, 232a, 232b ... gripping part, A ... food, F ... film (long film), F1 ... first length Length film (film: long film), F2 ... second long film (film: long film), F2a, F2b ... film, N ... notch, R ... transport path, R1 ... first transport path, R2 ... first Two transport paths, S ... sheet food, T ... tension, θ ... interior angle

Claims (3)

1. In a state where a packaging material for packaging food or a film constituting one of the packaging materials is sandwiched between a horn to which ultrasonic waves of a predetermined frequency are applied and a receiving material, the film is formed by applying ultrasonic waves to the horn. A cutting auxiliary line forming method for melting and forming a groove-shaped cutting auxiliary line on the film, wherein the receiving material is narrower as the width of at least one direction of the tip part sandwiching the film together with the horn is toward the tip. An ultrasonic wave is applied to the horn while applying a tension in a direction perpendicular to the width direction of the front end portion of the receiving material to the formed film sandwiched between the horn and the receiving material, and the front end portion of the receiving material on the film The cutting auxiliary line formation method characterized by forming the cutting auxiliary line extended in the direction orthogonal to the width direction of this.
2. The cutting auxiliary line forming method according to claim 1, wherein the front end portion of the receiving material is formed so that both sides in the width direction form an obtuse angle and the width becomes narrower toward the front end.
3. A receiving material in which a long film is adopted as the film, the long film is intermittently conveyed in the longitudinal direction, and the long film in a stopped state is arranged so that the width direction of the leading end coincides with the longitudinal direction of the film. The horn is sandwiched between the horn and the ultrasonic wave is applied to the horn while applying a tension in the direction perpendicular to the longitudinal direction to the long film, thereby forming a cutting auxiliary line extending in the direction perpendicular to the longitudinal direction of the long film. The cutting auxiliary line formation method according to claim 1 or 2.

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