JP4637260B1 - Cutting auxiliary line forming method, packaging material and receiving material for forming cutting auxiliary line - Google Patents

Abstract

A cutting auxiliary line forming method and receiving material for forming two cutting auxiliary lines so that a film is surely divided into two.
A cutting auxiliary line forming method includes a wrapping material for wrapping an object to be packaged, or films F1 and F2 which are one component of the wrapping material, a horn 200 to which an ultrasonic wave of a predetermined frequency is applied, and a receiving material 210. In the state of being sandwiched between, the films F1 and F2 are melted by applying ultrasonic waves to the horn 200 to form groove-shaped auxiliary cutting lines 11a, 11b, 16a and 16b on the films F1 and F2. The receiving material is formed so that the width in at least one direction of the tip end portion 212 sandwiching the films F1 and F2 together with the horn 200 is narrowed toward the tip end. Are applied to the film F1 and F2 so that the auxiliary cutting lines 11a, 11b, 16a and 16b extending in the direction perpendicular to the width direction of the front end portion 212 of the receiving member 210 intersect or contact at the intermediate portion. Form.
[Selection] Figure 1

Description

  The present invention relates to a cutting auxiliary line forming method for forming a cutting auxiliary line for cutting (tearing) the film on a packaging material for packaging an object to be packaged such as food or a film constituting one of the packaging materials. The present invention relates to a packaging material in which a cutting auxiliary line is formed and a receiving material for forming a cutting auxiliary line for forming the cutting auxiliary line together with a horn.

  Conventionally, various types of packaging materials have been provided for packaging foods such as rice balls such as rice balls and sushi, breads such as sandwiches, confectionery breads, and side dishes, depending on the packaging form. However, 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 assisting means on a film constituting the packaging material, and can be opened by tearing the film with the cutting assisting means.

  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, It is considered to be a package that wraps rice balls.

  Then, the packaging body cuts the outer film with the cutting assisting means and divides it in the width direction (divides it into two parts), and separates the inner film in the width direction, so that the inner film and the sheet-like food are inserted from the inside. The film can be pulled out. Thereby, the rice ball and sheet-shaped food which were isolate | separated via the inner film are united, and it will be in the state which can eat these together now.

  And the cut tape was adopted as the mainstream of the cutting assisting means, but the cut tape is adhered to the film via an adhesive, etc., so the adhesive softens when food is heated in a microwave oven etc. As a result, the cut tape may peel off from the film or the adhesive may melt.

  In order to solve such a problem, it has also been proposed to provide a perforation as a cutting assisting means on the film. However, since the perforation is provided in a broken line shape with respect to the film, the film communicates with the inside and outside through the cut, and the package using the film is unfavorable for hygiene. .

  Therefore, a film for closing which closes perforations (cuts) can be attached to the film. However, in this case, not only is it difficult to open the package, but, as in the case of cut tape, when the food is heated in a microwave oven, the adhesive softens and the closing film peels off the film. There was a risk that the adhesive would melt.

  For this reason, it has been proposed to employ a half cut as a cutting assisting means. Such a half cut is a long and narrow groove formed on the film by melting a film that becomes a packaging material by ultrasonic waves or the like. As a result, the packaging material (film) has a thin portion corresponding to the half cut.

  Thereby, since the packaging material (film) which employ | adopted the half cut does not communicate inside and outside, it can package food in a hygienic favorable state without the entrance of moisture and the like. And, when a tensile force is applied to the film in a direction orthogonal 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 film can be easily cut at a thin and weakened portion and the package can be opened.

  However, when a half cut is formed on a thin packaging material (film), the packaging material (film) may not be cut along the half cut when the package is opened. 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 (opening the package), the film is not guided to the half cut. In some cases, it could not be cut along the half cut.

  Therefore, the present applicant has disclosed a cutting auxiliary line forming method capable of forming a cutting auxiliary line that can be cut on a predetermined line on a sheet-like film regardless of the thickness of the film.

  As shown in FIG. 8 (a), this cutting auxiliary line forming method includes a wrapping material for wrapping food or a long film F which is one component of the wrapping material, and a horn 200 to which ultrasonic waves of a predetermined frequency are applied. The long film F is melted by applying ultrasonic waves to the horn 200 in a state of being sandwiched between the receiving material 210 and the groove-shaped cutting auxiliary line L is formed on the long film F.

  The horn 200 is provided with a flat contact portion 202 that contacts the upper surface of the long film F. In addition, the receiving material 210 is formed so as to be narrower (in the shape of a mountain) as the width of at least one direction of the front end portion 212 sandwiching the long film F together with the horn 200 approaches the front end, and is sandwiched between the horn 200 and the receiving material 210. By applying ultrasonic waves to the horn 200 while applying a tension in a direction perpendicular to the width direction of the front end portion 212 of the receiving material 210 to the long film F, the front end of the receiving material 210 is placed on the long film F. A cutting auxiliary line L extending in a direction orthogonal to the width direction of the portion 212 is formed.

  According to this cutting auxiliary line forming method, the long film F is applied by the vibration energy of the horn 200 by applying ultrasonic waves to the horn 200 with the long film F sandwiched between the horn 200 and the receiving material 210. The melted portion is pushed away to both sides (both sides in the width direction) of the front end portion 212 of the receiving material 210, and corresponds to the portion where the front end portion 212 exists in the horn 200 as shown in FIG. While the portion to be thinned is formed, raised portions R and R that are raised in the same shape are formed on both sides of the thin portion.

  Such a long film F wraps an article to be packaged, a predetermined part is sealed, and is cut at a predetermined length, whereby a sheet-like film becomes a packaging material in which the article to be packaged is packaged. This packaging material is formed with a cutting auxiliary line L, and when pulled in a direction perpendicular to the cutting auxiliary line L, the portion corresponding to the cutting auxiliary line L whose thickness is extremely thinner than the surroundings. Tensile force (tensile force) concentrates on the film, and it is torn at the thinned part (on the cutting auxiliary line L).

  When the packaging material is torn like this, even if the film is torn in the direction intersecting with the extending direction of the cutting auxiliary line L, the ridges R and R having increased strength are formed on both sides of the cutting auxiliary line L. Since they are formed in the same shape, the film is torn along the cutting auxiliary line L.

Japanese Patent No. 4264123

  As shown in FIG. 9, the packaging material 1 in which the cutting auxiliary line L is formed stores the sheet-like food S inside, is folded in half so as to sandwich the rice ball A which is an example of the packaged object, and overlaps three sides. It is set as the package 2 by welding (it shows by attaching a dot to the welded area).

  Then, both ends of the cutting auxiliary line L are overlapped, and a notch N including these both ends is formed in a V shape (or I shape although not shown) at the short end where the packaging material 1 is welded. Yes. When the package 2 is pulled in the short direction with both sides of the notch N, the pulling force concentrates on the notch N. Then, the notch N becomes a starting point, and the package 2 is torn along the cutting auxiliary line L and opened.

  However, in the packaging material 1 folded in half so as to sandwich the rice ball, it is extremely difficult to overlap the notch N portion of the front side auxiliary cutting line L and the notch N portion of the rear side auxiliary cutting line L. In addition, even if the portions of both notches N completely overlap, it is difficult to make the V-shaped or I-shaped tip of the notch N continuous with the auxiliary cutting line L.

  If the tip of the notch N is not continuous with the cutting auxiliary line L, the notch N is provided at the welded portion, so that the tensile force concentrated on the notch N is directed toward the end of the cutting auxiliary line L. In some cases, the auxiliary cutting line L was not torn and was not torn.

  Such a problem can be solved by forming the first and second cutting auxiliary lines L and L as shown in FIG. The ends of the two cutting auxiliary lines L and L are also located in the notch N. The tip of the notch N can be easily positioned between the ends of the two cutting auxiliary lines L and L.

  And in order to open the package 2, the pulling force concentrated on the notch N is guided to one of the auxiliary cutting lines L, L, and the auxiliary package L is torn to open the additional package 2. it can.

  However, if the first cutting auxiliary line L is torn on the front side and the second cutting auxiliary line L is torn on the rear side, the two cutting auxiliary lines L are not connected to each other at the bottom. It cannot be divided and it becomes difficult to pull the inner film from between the rice ball and the sheet-like food S.

  Then, this invention makes it a subject to provide the cutting auxiliary line formation method which forms two cutting auxiliary lines so that a film may be divided into 2 reliably.

  The cutting auxiliary line forming method according to the present invention is a state in which a packaging material for packaging an object to be packaged or a 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 the film by applying an ultrasonic wave to the horn, wherein the receiving material is sandwiched between the film and the horn. The width of at least one direction is narrowed toward the tip, the film is sandwiched between the horn and the receiving material, ultrasonic waves are applied to the horn, and the direction perpendicular to the width direction of the leading end of the receiving material is placed on the film. Two extending auxiliary cutting lines are formed so as to intersect or contact each other at an intermediate portion.

  According to the above cutting auxiliary line forming method, the receiving material is formed narrower as the width of at least one of the front end portions sandwiching the film together with the horn toward the front end, and by applying ultrasonic waves to the horn, 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 sandwiched between the receiving materials.

  By applying ultrasonic waves 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 of the receiving material (both sides in the width direction). ) Will be pushed away. Thereby, while the thin cutting auxiliary line is formed in the part corresponding to the part in which the front-end | tip part exists in a horn, the protruding part which rose on both sides of the thin part is formed.

  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 be torn 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 torn along with the cutting auxiliary line.

  The film is formed with two auxiliary cutting lines that intersect or touch at the intermediate portion. When the packaging material constituted by this film is folded in half and the object to be packaged is packaged, a package body in which the ends of the cutting auxiliary lines overlap each other is obtained. In this package, even if the cutting auxiliary lines are slightly displaced and overlapped, when a tearing force is applied between the ends of the two cutting auxiliary lines, the film is torn along one of the cutting auxiliary lines. Even if it is torn along different cutting auxiliary lines on the front side and the back side, the torn line is connected at the intermediate portion, so that the package can be completely divided into two.

  Moreover, as one aspect of the present invention, it is preferable that two ridge lines of the same line as the two cutting auxiliary lines to be formed are provided at the tip of the receiving member.

  According to this cutting auxiliary line forming method, two ridge lines of the same line as the two cutting auxiliary lines to be formed are provided at the front end portion of the receiving material, whereby the ridge line and the horn sandwich the film, By moving on the ridgeline of the receiving material through the film, two cutting auxiliary lines that intersect or touch at the intermediate portion can be formed.

  In one embodiment of the present invention, the horn is preferably formed to have a width straddling two ridge lines.

  According to this cutting auxiliary line forming method, the horn moves through the film from one end portion to the other end portion of the receiving material, or from the other end portion to the one end portion. An auxiliary line can be formed.

  Further, 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 a width direction of the tip portion of the film. The horn is sandwiched between a receiving material and a horn arranged so as to coincide with the longitudinal direction, and an ultrasonic wave is applied to the horn while applying a tension in a direction perpendicular to the longitudinal direction to the long film. A cutting auxiliary line extending in a direction orthogonal to the direction may be formed.

  When a long film is conveyed in the longitudinal direction, tension may act between the upstream side and the downstream side of the film due to the conveyance. In such a case, the auxiliary cutting line is connected to the longitudinal direction of the long film ( If the film is formed so as to extend in a direction orthogonal to the (conveying direction), the long film may be broken by a cutting auxiliary line during the conveyance of the long film.

  Therefore, when a long film is transported in the longitudinal direction, the cutting auxiliary line is not usually formed so as to extend in a direction perpendicular 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 long film, even if the auxiliary cutting line is formed so as to extend in the direction orthogonal to the longitudinal direction of the long film, it is long. The scale 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.

  In addition, the packaging material according to the present invention is divided by a cutting auxiliary line formed thinly so as to be cut across both ends, and a film in which raised portions with increased strength are formed on both sides of the cutting auxiliary line. It is the comprised packaging material, Comprising: Two said cutting auxiliary lines are provided so that it may cross | intersect or contact | connect in the intermediate part of a film.

  According to the packaging material described above, the two auxiliary cutting lines intersecting or in contact with each other at the intermediate part are formed, and when the package is wrapped in two, the ends of the auxiliary cutting lines overlap each other. It becomes a package. In this package, even if the cutting auxiliary lines are slightly shifted and overlapped, if a force in the tearing direction is applied between the ends of the two cutting auxiliary lines, the film will follow any of the cutting auxiliary lines. Torn. Therefore, even if this package is torn along different cutting aid lines on the front side and the back side, the torn line is connected at the intermediate portion, so that the package can be completely divided into two.

  In the aspect of the invention, the auxiliary cutting line and the raised portion may be formed in a straight line from one end to the other end.

  When the packaging material is short in the longitudinal direction, even if the cutting auxiliary line and the raised part are formed in a straight line from one end to the other end, the width between the ends of the two cutting auxiliary lines does not interfere with opening. It can be as follows. In other words, the packaging material is a straight line from one end to the other end of the cutting auxiliary line and the raised portion when the distance between the ends of the two cutting auxiliary lines can be equal to or less than the width that does not hinder. It can be formed.

  In the aspect of the present invention, the cutting auxiliary line and both end portions of the raised portion may be formed in parallel.

  According to the packaging material of the upper machine configuration, the angle formed by the cutting auxiliary line on one end side (the same applies to the other side) and the cutting auxiliary line on the intersection or in contact with the cutting auxiliary line on one end (the same applies to the other side) Even if it is large, by forming both end portions in parallel, the distance between each end portion of the two cutting auxiliary lines can be made equal to or less than a width that does not hinder opening.

  Moreover, the receiving material for cutting auxiliary line formation which concerns on this invention is the cutting assistance which pinches | interposes the packaging material which packages a to-be packaged object, or the film used as one structure of this packaging material with the horn to which the ultrasonic wave of a predetermined frequency is provided. It is a receiving material for forming a line, and two inclined surfaces are provided at the tip part sandwiching the film together with the horn, and the two inclined surfaces are narrowed toward the tip, and the ridge line where both surfaces meet is in the length direction. It is characterized in that two are formed so as to intersect or touch each other at the middle part of the.

  According to the receiving material for forming the cutting auxiliary line having the above-described configuration, the horn moves forward on the receiving material through the film because the two ridge lines are formed so as to intersect or contact each other at the intermediate portion in the length direction. Alternatively, by simply moving backward, two cutting auxiliary lines that intersect or touch at the intermediate portion can be formed on the film.

  According to the present invention, two cutting auxiliary lines that are in contact with or in contact with the intermediate part are formed on the film, so that the packaging material constituted by this film is completely connected to the intermediate part of the cutting auxiliary line when opened. Since it is divided | segmented, there can exist the outstanding effect that openability can be improved.

It is a general | schematic disassembled perspective view which shows the packaging material which has the cutting auxiliary line formed by one Embodiment of this invention, and includes a partially expanded sectional view. It is a schematic perspective view which shows the packaging material which has the cutting auxiliary | assistant line formed by one Embodiment of this invention. The cutting auxiliary line formed by one Embodiment of this invention is shown, (a) is a schematic plan view of the packaging material which has a linear cutting auxiliary line, (b) is the outline of the packaging material which has the bent cutting auxiliary line. It is a top view. It is the schematic perspective view which looked at the package which packaged the to-be-wrapped material with the packaging material which has the cutting auxiliary line formed by one Embodiment of this invention from the bottom side. It is a schematic perspective view which shows the concept of the manufacturing equipment which forms a cutting auxiliary line by one Embodiment of this invention. The receiving material which forms a cutting auxiliary line by one Embodiment of this invention is shown, (a) is a schematic plan view used with a long film with a narrow width, (b) is a schematic plane used with a long film with a wide width. FIG. It is a principal part enlarged plan view of the packaging material which has the cutting auxiliary line of embodiment different from the above of this invention. (A) is a principal part expanded sectional view which shows the method of forming the conventional cutting auxiliary line, (b) is a principal part expanded sectional view which shows the cutting auxiliary line formed of the conventional cutting auxiliary line. It is a schematic perspective view which shows the package body which packaged the to-be packaged object with the packaging material which has the conventional cutting auxiliary line. It is a schematic perspective view which shows the package which packaged the to-be packaged object with the packaging material which has the conventional cutting auxiliary line different from FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 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 description 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 schematically described.

  As shown in FIGS. 1 and 2, the packaging material includes an inner film 10 configured to be separable in the width direction, and an outer film 15 superimposed on the inner film 10 with the sheet-like food S interposed therebetween. 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 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 such that two cutting auxiliary lines 11a and 11b extending in the longitudinal direction through a substantially center in a direction (short direction) perpendicular to the longitudinal direction intersect at an intermediate portion. ing. The auxiliary cutting lines 11a and 11b are formed in a groove shape as shown in the partially enlarged sectional view of FIG. Thereby, as for the inner film 10, the site | part in which the cutting auxiliary lines 11a and 11b were formed is thin. That is, the site | part corresponding to the cutting | disconnection auxiliary lines 11a and 11b is thinner than the initial thickness (thickness of the film for packaging materials used as the inner film 10).

  And since the cutting auxiliary line 11a, 11b is formed in the inner film 10 which concerns on this embodiment by the cutting auxiliary line formation method mentioned later, this cutting auxiliary line 11a, 11b is formed in the both sides of the cutting auxiliary line 11a, 11b. The raised portions 12 and 12 are formed so as to swell along the surface. The raised portions 12 and 12 of the inner film 10 have an initial thickness (the thickness of the packaging material film that becomes the inner film 10), as opposed to the portions corresponding to the cutting auxiliary lines 11a and 11b (thin portions). It is thicker than. Thereby, as for the inner film 10, while the depth of the cutting auxiliary lines 11a and 11b is ensured, the intensity | strength of the both sides of this auxiliary cutting lines 11a and 11b is stronger than another part.

  The outer film 15 is composed of a single film and is formed in a rectangular shape. The outer film 15 according to the present embodiment is formed in the same shape and size as the inner film 10 and extends in the longitudinal direction through the approximate center in the direction (short direction) perpendicular to the longitudinal direction. The cutting auxiliary lines 16a and 16b are formed so as to intersect at an intermediate portion.

  Therefore, the outer film 15 forms the auxiliary cutting lines 16a and 16b in a groove shape that is thinner than the original thickness (the thickness of the packaging film that becomes the outer film 15), and is formed on both sides of the auxiliary cutting lines 16a and 16b. It is assumed that thick bulges 17 and 17 swelled along the cutting auxiliary lines 16a and 16b are formed. Thereby, the outer film 15 ensures the depth of the cutting auxiliary lines 16a and 16b, and the strength of both sides of the cutting auxiliary lines 16a and 16b is stronger than the other parts.

  Any of the auxiliary cutting lines 11a, 11b, 16a, 16b intersects at an intermediate portion between the inner film 10 and the outer film 15 and is spaced at each end. An angle formed by a line connecting one end of the inner film 10 and the outer film 15 to the intersection and one end of the auxiliary cutting lines 11a, 11b, 16a, and 16b (the other end, the intersection, and the other end) The angle formed by the cutting auxiliary line is also referred to as the angle formed by the cutting auxiliary line.) The cutting auxiliary lines 11a, 11b, 16a, and 16b are X-shaped straight lines in relation to α and the sizes of the inner film 10 and the outer film 20. Or bent at the middle so as to be parallel at both ends.

  That is, when the inner film 10 and the outer film 15 are small in size (short in the longitudinal direction) as shown in FIG. 3A, the cutting auxiliary lines 11a, 11b, 16a, and 16b have an angle α formed by the cutting auxiliary line. Even if the inner film 10 and the outer film 15 are linearly formed from one end to the other end in the longitudinal direction, the distance between the ends of the auxiliary cutting lines 11a, 11b, 16a, 16b is, for example, about 15 mm or less. Therefore, there is no inconvenience at the time of opening which will be described later, and the auxiliary cutting lines 11a, 11b, 16a and 16b can be torn.

  However, if the inner film 10 and the outer film 15 have a large size (long in the longitudinal direction) as shown in FIG. 3B, the lengths in the longitudinal direction of the inner film 10 and the outer film 15 become longer. If the angle α formed by the auxiliary line is the same as that shown in FIG. 3A and the cutting auxiliary lines 11a, 11b, 16a, and 16b are formed in a straight line as shown by the two-dot difference line, the longitudinal direction of the inner film 10 and the outer film 15 The distance between both ends becomes about 15 mm or more. Then, it becomes difficult to tear the auxiliary cutting lines 11a, 11b, 16a, and 16b at the time of opening to be described later.

  Therefore, in the case where the inner film 10 and the outer film 15 having a large size have an interval between end portions of about 15 mm or less and the angle α formed by the cutting auxiliary line is the same as that shown in FIG. , 11b, 16a, 16b are parallel at both end portions and bent at the intermediate portion.

  However, in the large-sized inner film 10 and outer film 15, the distance between both ends of the auxiliary cutting lines 11a, 11b, 16a, and 16b is set to about 15 mm or less, and the cutting is performed as shown by the one-dot difference line in FIG. The angle α formed by the auxiliary line may be narrower than the angle shown in FIG. On the contrary, the cutting auxiliary lines 11a, 11b, 16a, 16b may have a longer parallel portion and a larger angle α formed by the cutting auxiliary line as shown by the solid line in FIG.

  And the inner film 10 and the outer film 15 are set as the packaging material 1 which was welded so as to surround the sheet-like food S in a state of being overlapped via the sheet-like food S such as seaweed as shown in FIG. Thereby, the packaging material 1 which concerns on this embodiment has the welding part (area | region which attached | subjected the dot in FIG. 1, FIG. 2) to which the inner film 10 and the outer film 15 were welded mutually over the perimeter of the outer periphery. Is formed.

  Further, the packaging material 1 has notches for opening (notches serving as opening start points) 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 11a, 11b, 16a, 16b. ) N is formed. 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 which concerns on this embodiment consists of the above structures, and demonstrates the packaging method and opening method by the packaging material 1 of the said structure continuously.

  First, as shown by an imaginary line 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. By folding the packaging material 1 in this way, both end portions in the longitudinal direction of the inner film 10 overlap each other, and both end portions in the short direction of the inner film 10 overlap each other.

  Then, as shown in FIG. 4, the packaging material 2 is obtained by welding (sealing) the three end portions of the inner film 10 that are overlapped (opposed) by folding the entire packaging material 1 in half. 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. Further, the ends of the two auxiliary cutting lines 11a, 11b, 16a and 16b are located in the notch N.

  The notches 13 and 18 of the inner film 10 and the outer film 15 are formed so that the edges of both the films 10 and 15 defining the notches 13 and 18 and the cutting auxiliary lines 11a, 11b, 16a and 16b are continuous. However, if the auxiliary cutting lines 11a, 11b, 16a, and 16b are included in the region where both ends in the longitudinal direction of the inner film 10 are welded, the unsealing property is deteriorated. Welding between both ends is performed so as not to include the cutting auxiliary lines 11a, 11b, 16a, and 16b as much as possible.

  And as mentioned above, when the edge parts of the inner film 10 are welded together, the packaging material 1 is the packaging which wrapped 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 body 2.

  In order to open the package 2, when the package 2 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 pulling force concentrates on the notch N. Then, the notch N (the boundary (intersection) between the edges defining the notches 13 and 18 and the auxiliary cutting lines 11a, 11b, 16a, and 16b) is the starting point, and each of the inner film 10 and the outer film 15 has the auxiliary cutting line. It is torn (cut) along 11a, 11b, 16a and 16b.

  Since the packaging material 1 which concerns on this embodiment has the bulging part 12, 12, 17, 17 with which intensity | strength increased on both sides of the cutting auxiliary wire 11a, 11b, 16a, 16b of the inner film 10 and the outer film 15, it forms. (Refer to the enlarged sectional view of FIG. 1) When the inner film 10 and the outer film 15 are torn as described above, the tears (cutting lines) get over the raised portions 12, 12, 17, 17 and the cutting auxiliary lines 11a, 11b, 16a, 16b is not detached, and both films 10, 15 are torn cleanly along the cutting auxiliary lines 11a, 11b, 16a, 16b.

  And each of the inner film 10 and the outer film 15 is cut | disconnected along the cutting auxiliary line 11a, 11b, 16a, 16b, and the package body 2 whole (the inner film 10 and the outer film 15) isolate | separates in a transversal direction. Will be (divided in two).

  It should be noted that the ends of the two auxiliary cutting lines 11a, 11b, 16a, and 16b are located in the notch N, which is the starting point of the inner film 10 and the outer film 15, for example, the front side. Then, the left side auxiliary cutting lines 11a, 11b, 16a, and 16b may be torn, and the back side may be torn from the right auxiliary cutting lines 11a, 11b, 16a, and 16b. However, since the cutting auxiliary lines 11a, 11b, 16a, and 16b intersect at the intermediate portion, even in such a case, the tear line joins at the intermediate portion, and the package 2 is divided into two.

  And as above-mentioned, by pulling the edge part of the package 2 to a transversal direction, while each of the inner film 10 and the outer film 15 is divided into two, the one end side of the transversal direction of the package 2 and As a result of the separation from the other end side, the inner film 10 divided into two parts 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, with reference to FIG. 5, a manufacturing facility for the packaging material 1 including facilities for forming the auxiliary cutting lines 11 a, 11 b, 16 a, and 16 b for the film that becomes the inner film 10 and the film that becomes the outer film 15 will be described. explain.

  Such manufacturing equipment includes a transport path (hereinafter referred to as the first transport path) for transporting a long film (hereinafter referred to as the 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 a second long film) F2 that is a continuous body of the inner film 10, and a conveyance path (hereinafter referred to as a conveyance path) that conveys the film F2 in the longitudinal direction. R2) (referred to as a second conveyance path).

  On the 1st conveyance path | route R1, the cutting auxiliary line formation part (henceforth a 1st cutting auxiliary line formation part) 20a which forms the cutting auxiliary lines 16a and 16b in the 1st elongate film F1, and 1st elongate film F1 The food placing part 21a for placing the sheet-like food S thereon, the film superposing part 22a (22) for superimposing the second long film F2 on the first long film F1, and the second on the first long film F1. Film welding portion 23a (23) for welding the long film F2, 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, The film cutting part 24a (24) used as the sheet-like packaging material 1 is provided.

  And 1st conveyance path 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, 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 conveyance path R2, a cutting auxiliary line forming part (hereinafter referred to as a second cutting auxiliary line forming part) 20b for forming the auxiliary cutting lines 11a and 11b on the second long film F2 and the second A film superposition part 22b (22) for superimposing the first long film F1 on the long film F2, a film welding part 23b (23) for welding the first long film F1 to the second long film F2, the first length A film cutting part 24b (24) for cutting the second long film F2 to which the long film 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. ing.

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

  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 polymerization 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.

  And the 1st cutting auxiliary line formation part 20a and the 2nd cutting auxiliary line formation part 20b are an intermediate part with respect to a long film (1st long film F1, 2nd long film F2), respectively by an ultrasonic wave. Two intersecting groove-shaped cutting auxiliary lines 11a, 11b, 16a, and 16b are formed. That is, the first cutting auxiliary line forming part 20a forms the cutting auxiliary lines 16a and 16b 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 lines 11a and 11b for the inner film 10 are formed by ultrasonic waves on the two long films F2.

  More specifically, the first auxiliary cutting line forming portion 20a includes a horn 200 to which an ultrasonic wave having a predetermined frequency is applied and a receiving member 210 disposed so as to face the horn 200, as shown in FIG. And. 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. Groove-shaped cutting auxiliary lines 16a and 16b are formed on the first long film F1.

  However, the receiving member 210 is formed in a deformed prism shape having a length substantially the same as the width of the first long film F1 so as to form the two auxiliary cutting lines 16a and 16b, and the first long length in a horizontal posture. It arrange | positions at the lower surface side of the film F1. That is, as shown in the partially enlarged end view of FIG. 5, the receiving member 210 has two inclined surfaces 212 a and 212 b at a tip portion (second film contact portion described later) 212 that sandwiches the first long film F <b> 1 together with the horn 200. The two inclined surfaces 212a and 212b become narrower toward the tip, and two ridge lines 212c where the both surfaces 212a and 212b meet are formed. More specifically, the receiving material 210 includes a receiving material main body 211 arranged at a fixed position, and a second film contact portion protruding from the receiving material main body 211 toward the horn 200 (first long film F1). 212.

  Then, the second film contact portion 212 has an X-shape in plan view as shown in FIG. 6A or FIG. 6 (FIG. 6A) so that the two cutting auxiliary lines 16a and 16b intersect at an intermediate portion in the length direction. As shown in b), it is formed in a deformed X shape with both ends parallel. Moreover, the 2nd film contact part 212 is the front-end | tip part of the said receiving material 210 made to contact with the other back surface of the 1st elongate film F1, and is the width | variety of one direction orthogonal to the longitudinal direction (axial direction) of the receiving material 210. Is formed so as to become narrower toward the tip (horn 200 side). That is, the end face of the second film contact portion 212 is formed in an inverted W shape.

  And the 2nd film contact part (front-end | tip part) 212 which concerns on this embodiment is formed so that both surfaces 212a and 212b of the width direction may make an obtuse angle, as shown in the partially expanded end view of FIG. That is, the second film contact portion 212 according to the present embodiment approaches the two surfaces (both sides in the width direction) 212a and 212b protruding upward from the receiving material body 211 toward the tip from the receiving material body 211 side. The inner angle θ of both the inclined surfaces 212a and 212b is set to an obtuse angle.

  And the receiving material 210 is arrange | positioned so that the ridgeline 212c formed toward the front-end | tip in the width direction both surfaces 212a and 212b may extend in the width direction of the 1st elongate film F1.

  In the case where the cutting auxiliary lines 16a and 16b are not formed on the side portions of the first long film F1 and the side portions are cut as scrap, at least the second film contact portion 212 of the receiving material 210 is shown in FIG. As shown, it is set slightly shorter (width to be cut) than the width of the first long film F1.

  In addition, when the auxiliary cutting lines 16a and 16b are formed over the entire length in the width direction with respect to the first long film F1, the second film contact portion 212 of the receiving material 210 is not illustrated, but the first long film The length is set to be equal to or longer than the width of the film F1.

  And the 1st cutting auxiliary line formation part 20a which concerns on this embodiment is the front-end | tip part 212 of the receiving material 210 with respect to the 1st long film F1 pinched | interposed into the horn 200 and the receiving material 210, as shown in FIG. The tension T is made to act in a direction orthogonal to the width direction. That is, the first cutting auxiliary line forming portion 20a further includes a tension generator 230 that applies a tension T in the width direction to the first long film F1 in accordance with the arrangement of the receiving material 210 and the horn 200. ing. The tension generator 230 includes a pair of gripping means 231 and 232 for gripping both end portions in the width direction of the first long film F1.

  As described above, when both side portions of the first long film F1 are cut as scrap, the pair of gripping means 231 and 232 grips the side portions of the first long film F1 adjacent to the receiving material 210. Is configured to do.

  Further, in the case where the receiving material 210 is disposed over the entire width without cutting both ends of the first long film F1 as scrap, although not shown, each gripping means 231 and 232 are each end of the receiving material 210. It is comprised so that each edge part of the 1st elongate film F1 may be hold | gripped at two places in the position which pinches | interposes both sides of this.

  In any case, in the horn 200, the first film contact portion 202 provided at the lower end is formed larger than the interval between the ridge lines 212c of the two second film contact portions 212, and the direction in which the ridge line 212c extends ( (In the width direction of the first long film F1) and along the two ridge lines 212c, the reciprocating motion is provided.

  That is, the first cutting auxiliary line forming portion 20a having the above configuration sandwiches the first long film F1 between the first film contact portion 202 of the horn 200 and the ridgeline 212c of the second film contact portion 212 of the receiving material 210, and The tension generator 230 applies a tension T in the width direction to the first long film F1, and in this state, while applying ultrasonic waves to the horn 200, the horn 200 is placed on the top (ridge line) of the second film contact portion 212. 212c), the two auxiliary cutting lines 16a and 16b extending in the width direction are formed on the first long 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, regarding the description of the second cutting auxiliary line forming portion 20b, the above description of the first cutting auxiliary line forming portion 20a and FIGS. 5 and 6 will be referred to and omitted here.

  As shown in FIG. 5, the food placing portion 21a on the first conveying path R1 arranges the sheet-like food S on the cutting auxiliary lines 16a and 16b formed by the first cutting auxiliary line forming portion 20a. ing. 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 of 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 elongate film F1 and the 2nd elongate film F2 conveyed on both radial path 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 (overlapped first and second lengths) conveyed on the overlapping first conveyance path R1 and second conveyance path R2. 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 F1 and 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.

  Next, a manufacturing method (cutting auxiliary line forming method) of the packaging material 1 according to the present embodiment will be described. The manufacturing equipment 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. .

  In this embodiment, while forming the cutting auxiliary lines 16a and 16b with respect to the 1st long film F1 in the 1st cutting auxiliary line formation part 20a, the 2nd cutting auxiliary line formation part 20b is applied to the 2nd long film F2. On the other hand, in order to form the cutting auxiliary lines 11a and 11b, 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.

  Here, a method of forming the cutting auxiliary lines 11a, 11b, 16a, and 16b for the long films (the first long film F1 and the second long film F2) will be described.

  In a state where the long films F1 and F2 that are stopped are sandwiched between the receiving material 210 and the horn 200, the tension generator 230 generates ultrasonic waves while applying the tension T to the long films F1 and F2. Then, as a result of the ultrasonic wave being transmitted to the receiving material 210 through the long films F1 and F2, the vibration energy becomes heat and the long films F1 and F2 become the first of the receiving material 210 as shown in FIG. It melts along the two-film contact portion (tip portion) 212. 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 width direction of the long films F1 and F2, the long films F1 and F2, as shown in FIG. In the longitudinal direction, a force to approach the point of action of the tension T (scheduled position where the auxiliary cutting lines 11a, 11b, 16a, 16b are formed) acts.

  As a result, the portions (the raised portions 12, 12, 17, and 17) pushed away on both sides by the receiving member 210 (second film contact portion 212) approach each other, and as shown in the enlarged sectional view of FIG. Regardless of the thickness of the long films F1, F2, the distance between the raised portions 12, 12, 17, 17 is elongated and deep between the raised portions 12, 12, 17, 17 regardless of the thickness of the long films F1, F2. Thus, the deep groove-shaped cutting auxiliary lines 11a, 11b, 16a, and 16b are sufficiently formed.

  In this embodiment, when the horn 200 moves from one end of the long films F1 and F2 to the other end, two second film contact portions 212 of the receiving material 210 are formed. Since the receiving material 210 is provided with two ridge lines 212c intersecting at an intermediate portion, the two cutting auxiliary lines 11a, 11b, 16a, and 16b are formed to intersect at the intermediate portion. The ridges 12, 12, 17, and 17 formed on both sides of the cutting auxiliary lines 11a, 11b, 16a, and 16b are discontinuous inside at the portions where the cutting auxiliary lines 11a, 11b, 16a, and 16b intersect.

  Then, as described above, by forming the auxiliary cutting lines 11a, 11b, 16a, and 16b while intermittently moving the long films F1 and F2, the long films F1 and F2 have a longitudinal direction as shown in FIG. The auxiliary cutting lines 11a, 11b, 16a and 16b are formed at predetermined intervals.

  Note that the horn 200 is a long film on the downstream side of one pitch where the horn 200 is moved from one end of the long films F1 and F2 to the other end to form the auxiliary cutting lines 11a, 11b, 16a and 16b. The auxiliary cutting lines 11a, 11b, 16a, and 16b are formed by moving from the other end of F1 and F2 back to the one end. Accordingly, since the horn 200 forms the cutting auxiliary lines 11a, 11b, 16a, and 16b by moving forward and backward, the operation of the horn 200 is not wasted.

  And the 1st elongate film F1 is intermittently conveyed on 1st conveyance path R1, and corresponds to arrangement | positioning of the cutting | disconnection auxiliary lines 16a and 16b of the 1st elongate film F1 in the downstream food mounting part 21a. Sheet-like food S is placed. Therefore, when the first long film F1 is intermittently conveyed, the food placing portion 21a has an interval corresponding to the cutting auxiliary lines 16a and 16b of the first long film F1 that are sequentially sent. Then, the sheet-like food S is arranged.

  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 on the first long film F1 so that the cutting auxiliary lines 16a, 16b of the first long film F1 and the cutting auxiliary lines 11a, 11b of the second long film F2 coincide. F2 is superimposed. 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 elongate film F1 and the 2nd elongate film F2 which were piled up are welded so that the sheet-like food S may be surrounded. And the 1st long film F1 and the 2nd long film F2 which were united by the film cutting part 24 (24a24b) are cut | disconnected in the center of the welding part of the width direction. At the time of this cutting, notches N (notches 13 and 18) are formed by notching portions corresponding to both ends of the cutting auxiliary lines 11a, 11b, 16a and 16b. Thereby, the packaging material 1 as shown in FIG. 2 is completed.

  For example, the packaging material 1 is folded in half so as to sandwich the rice ball A, and three sides other than the folding side are welded to form a packaging body 2 as shown in FIG. In addition, after the packaging material 1 is folded in two and the three sides are welded, the notch N may be formed so as to include both ends of the cutting auxiliary lines 11a, 11b, 16a, and 16b.

  And in order to open the package 2, it pulls in the transversal direction of the package 2 with the both sides of the notch N. Then, as described above, the inner film 10 and the outer film 15 are torn along the cutting auxiliary lines 11a, 11b, 16a, and 16b with the notch N as an opening start point. By forming two cutting auxiliary lines 11a, 11b, 16a and 16b, the right cutting auxiliary lines 11a, 11b, 16a and 16b are torn as viewed from the front, and the right cutting auxiliary is also viewed from the back. Even if the lines 11a, 11b, 16a, 16b are torn, the intermediate portions of the cutting auxiliary lines 11a, 11b, 16a, 16b located at the bottom intersect, so the inner film 10 and the outer film 15 are It is completely divided into two. Therefore, the inner film 10 can be pulled out from between the sheet-like food S and the rice ball A so that the sheet-like food S wraps the rice ball A.

  In addition, this invention is not limited to the said embodiment, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

  For example, the receiving material 210 is not projected from the receiving material main bodies 211a and 11b, and the second film contact portion 212 and the second film contact portion 212 that are inclined in the “\” direction in a plan view. The second film contact portion 212 inclined in the “/” direction may be arranged in parallel on the upstream side and the downstream side, and the two auxiliary cutting lines may be formed separately.

  Further, although not shown, the receiving material is not a deformed prismatic shape but may be a rotary type (so-called ring). That is, the rotary receiving material moves in the same direction as the horn 200 through the long films F1 and F2.

  Further, the two cutting auxiliary lines 11a, 11b, 16a, and 16b may intersect at an intermediate portion that is eccentric to one side instead of an accurate center. Moreover, the packaging material manufactured by this invention can be used also as pillow packaging.

  Further, the two auxiliary cutting lines 11a, 11b, 16a, and 16b may be formed so as to contact each other in a circular arc shape at an intermediate portion as shown in FIG. The two auxiliary cutting lines 11a, 11b, 16a, and 16b shown in the figure are also formed in parallel at both ends, and are bent in an arc shape in the middle, but are formed so as to be bent as shown in FIG. May be. In any case, two cutting auxiliary lines 11a, 11b, 16a, and 16b are formed by the receiving material 210 and the horn 200 that match this shape.

DESCRIPTION OF SYMBOLS 1 ......... Packaging material 10 ......... Inner film 11a ...... Cutting auxiliary line 11b ...... Cutting auxiliary line 15 ......... Outer film 16a ... Cut auxiliary line 16b ... Cut auxiliary line 200 ... Horn 210 ... Receiving material 212 ... tip (second film contact part)
212a ... Inclined surface 212b ... Inclined surface 212c ... Ridge line F1 ... (First) Long film F2 ... (Second) Long film

Claims (8)

  By applying ultrasonic waves to the horn in a state where a packaging material for packaging an object to be packaged 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, A cutting auxiliary line forming method for melting a film to form a groove-shaped cutting auxiliary line on the film, wherein the receiving material has a width as a width of at least one direction of a tip portion sandwiching the film together with a horn is increased toward the tip. Narrowly formed, the film is sandwiched between the horn and the receiving material, ultrasonic waves are applied to the horn, and a cutting auxiliary line extending in a direction perpendicular to the width direction of the front end portion of the receiving material intersects or touches the film at the intermediate portion. A cutting auxiliary line forming method, characterized in that two are formed as described above.   The cutting auxiliary line forming method according to claim 1, wherein two ridge lines of the same line as the two cutting auxiliary lines to be formed are provided at a tip portion of the receiving material.   The cutting aux line forming method according to claim 2, wherein the horn is formed to have a width straddling two ridge lines.   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 placed so that the width direction of the leading end coincides with the longitudinal direction of the film. A cutting auxiliary line extending in a direction perpendicular to the longitudinal direction of the long film is sandwiched between the material and the horn, and ultrasonic waves are applied to the horn while applying a tension in a direction perpendicular to the longitudinal direction to the long film. The cutting auxiliary line forming method according to any one of claims 1 to 3, wherein the cutting auxiliary line is formed.   A packaging material that is constituted by a film that is divided by a cutting auxiliary line formed thinly so as to be cut across both ends, and has a raised portion with increased strength on both sides of the cutting auxiliary line, Two packaging materials are provided so that the cutting auxiliary line intersects or touches at an intermediate portion of the film.   The packaging material according to claim 5, wherein the auxiliary cutting line and the raised portion are formed in a straight line from one end to the other end.   The packaging material according to claim 5, wherein both ends of the cutting auxiliary line and the raised portion are formed in parallel.   A receiving material for forming a cutting auxiliary line for sandwiching a packaging material for packaging an object or a film constituting one of the packaging materials with a horn to which an ultrasonic wave of a predetermined frequency is applied, and sandwiching the film together with the horn Two inclined surfaces are provided at the tip, the two inclined surfaces are narrowed toward the tip, and two ridge lines where the two surfaces meet each other are formed so as to intersect or touch at the intermediate portion in the length direction. A receiving material for forming auxiliary cutting lines.

Images