JP2011116421A - Cutting auxiliary line forming apparatus and cutting auxiliary line forming method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting auxiliary line forming apparatus capable of forming a channel-like cutting auxiliary line to a film in a curved line shape, and a cutting auxiliary line forming method. <P>SOLUTION: The cutting auxiliary line forming apparatus, includes a horn by which an ultrasonic wave of a predetermined frequency is given; and a receiving member pinching a packaging material for packaging an article to be packaged or a film being a constitution of the packaging material with the horn, and forms the channel-like cutting auxiliary line on the film by giving the ultrasonic wave to the horn and melting thereby the film. In the receiving member, the width in at least one direction of the end part for holding the film with the horn is formed narrower toward the end, and in that the film, the horn and the receiving member pinching the film are relatively moved in the other direction intersecting orthogonally the one direction, they are moved relatively in the one direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cutting auxiliary line forming apparatus and a cutting auxiliary line for forming a cutting auxiliary line for cutting (cutting) the film, which is a component of the packaging material or packaging material for packaging an article to be packaged. It relates to a forming method.

  Conventionally, there are various types of packaging materials for packaging items such as foods, daily necessities, toys, etc., and as one of them, the entire packaging material or a part of the packaging material is composed of a resin film, There is provided a configuration in which a linear or belt-shaped cutting auxiliary means provided on the film can be cut and opened.

  Here, a packaging material for packaging rice balls will be described as an example. The packaging material is a linear or belt-shaped cutting auxiliary means extending in a direction (hereinafter referred to as a length direction) orthogonal to the width direction at a substantially center in the width direction. And two split films arranged side by side in the width direction so that their ends overlap each other, and through sheet-like foods such as laver, thin baked eggs, tatami mats, etc. The outer film and the inner film overlapped with the outer film, and the outer peripheral ends of the outer film and the inner film are welded so as to surround the sheet-like food.

  The packaging material having the above-described configuration is obtained by placing a rice ball on the inner film and folding it in the length direction, folding the four corners along the rice ball, or welding the opposite ends of the inner film. The rice balls can be packaged. And the packaging material of the said structure is the state which wrapped the rice ball and the sheet-like food by pulling to the width direction both sides after cutting an outer film with the cutting auxiliary | assistance means in the state which wrapped the rice ball, and dividing | segmenting into the width direction. The inner film (divided film) is pulled out from the gap, and the sheet-like food and the rice ball are integrated (a state where the sheet-like food and the rice ball can be eaten together).

  In addition to the above-described packaging material, a rice ball packaging material provided with two cutting assisting means extending in the length direction with an interval in the width direction with respect to the outer film is also provided. That is, the packaging material that cuts the outer film with a single line or band-shaped cutting aid means that there are many overlaps between the cut outer film (divided outer film) and the sheet-like food, and the rice ball and the sheet-like food. When pulling out the inner film (divided film) from between the outer film and the sheet-like food, a large resistance is generated and the sheet-like food may be broken. Open two strips of auxiliary cutting lines and cut out the wide area of the outer film between the two auxiliary cutting lines to reduce the overlap between the cut outer film and the sheet-like food, resulting in large resistance. There is also provided one that can pull out the inner film without breaking the sheet-like food (without breaking the sheet-like food).

  In such a packaging material, each cutting assisting means is arranged in a curved line (wavy line shape) so that many outer films can be cut in a substantially central region in the length direction that is greatly bent when folded in half in the length direction. Yes. That is, the packaging material in which the sheet-like food is inserted between the outer film and the inner film is a portion that is bent greatly when folded in half in order to wrap the rice balls (region in the middle of the length direction). ), The outer film and the inner film are in a state of sandwiching the sheet-like food, so that the cutting auxiliary line is formed in a curved line so that the central portion of the outer film that is largely bent can be cut most.

  By the way, it is said that the cutting auxiliary means for cutting the film as described above can generally adopt cut tape, perforation, half cut, etc., but when cut tape is adopted as the cutting auxiliary means In addition to the film which is the main component of the packaging material, there is a problem that a cut tape is required and the material cost is increased. Further, since the cut tape is adhered to the film with an adhesive, the cut tape may be peeled off from the film or the adhesive may be melted depending on the environment (for example, temperature).

  In addition, when a perforation is adopted as the cutting assisting means, external dust or moisture may enter the packaging material through the perforation (a large number of perforations through the film) and adhere to the package. Is concerned. For this reason, when a perforation is adopted as a cutting assisting means, the closing film is often stuck to the packaging material (film constituting the packaging material) so as to close the perforation (each cut), and as a result, the perforation. It becomes difficult to cut. In addition, when the closing film is adhered in this manner, the cost of the material is increased by the amount required for the closing film, as in the case of the cut tape, and the blocking film may be peeled off depending on the environment in which it is used. May melt out.

  On the other hand, since the half cut has an extremely fine groove shape, the film can be easily cut, and a hole penetrating the film is not formed, and a member other than the film is not required. It is said that it is superior to cut tapes and perforations in terms of protection of packaging and cost.

  However, since it is very difficult to properly form a half-cut in an extremely thin film, it has been avoided to adopt a half-cut in an actual packaging material. In other words, half-cut was supposed to be formed by cutting the film into a linear shape with a cutting blade, or melting the film into a linear shape with an ultrafine heat ray, but the thickness of the film to be processed is very large Because it is thin, when the film is shaved or melted, a hole is made in the film or a groove less than the required depth (shallow groove where the film is cut off the half-cut without being able to induce film cutting) ) Has been shunned for use in actual packaging materials.

  In such a current situation, as a result of earnest research every day, cutting that can be guided and cut properly by using ultrasonic waves that have been used to weld films and cut films. An auxiliary line can be formed. That is, when a film is sandwiched between a horn to which an ultrasonic wave of a predetermined frequency is applied and a receiving material, and an ultrasonic wave is applied to the horn in that state, the film melts along the tip of the receiving material, and the melted portion is received. Pushed away on both sides of the tip of the material. Therefore, by moving the film straight in one direction with the film sandwiched between the horn and the receiving material, or by moving the horn along the receiving material that is long in one direction, the receiving material on the film A groove-shaped auxiliary cutting line is formed in a portion where the tip portion exists (or a portion where the tip portion has passed).

  Further, as described above, since the melted portion of the film is pushed away to both sides by the leading end portion of the receiving material, the raised portions along the cutting auxiliary line are formed on both sides of the cutting auxiliary line. As a result, even if the film is torn apart from the cutting auxiliary line, the raised and highly rigid portion can prevent the film from tearing. Therefore, according to the said method, the cutting auxiliary line which can guide | invade the cutting direction of a film in the desired direction can be formed (for example, refer patent document 1).

Japanese Patent No. 4264123

  However, the above method forms a cutting auxiliary line by moving the film in a certain direction or moving the horn along the receiving material while the film is sandwiched between the horn and the receiving material. The actual situation is that the auxiliary line can only be formed in a straight line, and the cutting auxiliary means cannot be used in a packaging material that is required to be curved.

  Accordingly, in view of such circumstances, the present invention provides a cutting auxiliary line forming apparatus and a cutting auxiliary line forming method capable of forming a groove-shaped cutting auxiliary line capable of cutting the film in a curved shape with respect to the film. The task is to do.

  The auxiliary cutting line forming apparatus according to the present invention includes a horn to which an ultrasonic wave of a predetermined frequency is applied, and a receiving material for sandwiching a film that constitutes a packaging material for packaging an article to be packaged or a packaging material together with the horn, A cutting auxiliary line forming device for forming a groove-shaped cutting auxiliary line on the film by applying an ultrasonic wave to the horn, wherein the receiving material is at least in one direction of the tip portion sandwiching the film together with the horn The film and the horn sandwiching the film and the receiving material are arranged in the one direction so that the width of the film is narrowed toward the tip, and the movement trajectory of the receiving material on the film is curved. It is configured to move relative to each other in the other direction perpendicular to each other while moving in the one direction.

  According to the cutting auxiliary line forming apparatus having the above configuration, the receiving material is formed so that the width in at least one direction of the tip portion sandwiching the film together with the horn is narrowed toward the tip. The film sandwiched between the receiving material and the horn is melted in accordance with the shape of the front end portion of the receiving material by ultrasonic vibration energy. Then, the film, the horn sandwiching the film, and the receiving material are moved relative to each other in the other direction orthogonal to the one direction so that the movement trajectory of the receiving material on the film is curved. Since the film is also configured to move relative to the direction, the film will melt corresponding to the shape and movement trajectory of the tip of the receiving material, and a curved cutting auxiliary line can be formed on the film. .

  As one aspect of the cutting auxiliary line forming apparatus according to the present invention, the horn and the receiving material sandwiching the film and the film so that the movement trajectory of the front end portion of the receiving material on the film has a wavy shape undulating at a constant period And the horn and the receiving material may be reciprocated by a predetermined amount of movement in the one direction. By doing this, it is possible to form a wavy line (curved shape undulating at a substantially constant cycle) corresponding to the movement trajectory of the tip of the receiving material on the film.

  As another aspect of the cutting assisting line forming apparatus according to the present invention, the receiving material is formed in an arc shape or an annular shape with a virtual line extending in one direction at the tip portion and the tip of the tip portion is the virtual The unidirectional direction is formed such that an arcuate or annular ridgeline having a line as a center of curvature is formed, and the ridgeline extends in a tangential direction with respect to a trajectory of a front end portion of the receiving member corresponding to a planned formation position of the auxiliary cutting line. And it is preferable to be configured to rotate around a rotation axis extending in a direction orthogonal to the one direction and the other direction in correspondence with the movement of at least one of the other directions. In this way, when the tip of the receiving material is worn (consumed) with the formation of the cutting auxiliary line, the receiving material is rotated by a predetermined amount around the virtual line (center) without replacing the entire receiving material. Only by making it the part of the suitable shape of a front-end | tip part (appropriately tapering part) can be made to face toward a horn.

  Then, as described above, when the tip portion is formed in an arc shape or an annular shape, the contact portion of the receiving member with respect to the film has a width in the extending direction of the ridge line. When the horn and the receiving material sandwiching the film are moved relative to each other in the other direction while moving relative to each other, the film melted by the application of ultrasonic waves intersects the extending direction of the ridgeline by the tip. May be pushed in the direction.

  However, in the cutting auxiliary line forming apparatus of the present invention, the receiving material is unidirectionally and in the other direction so that the ridge line extends in a tangential direction with respect to the track of the tip of the receiving material corresponding to the planned cutting auxiliary line formation position. In response to at least one of the movements, the film is configured to rotate about a rotation axis extending in a direction orthogonal to the one direction and the other direction, so that the melted portion of the film may be pushed to the tip. Therefore, an appropriate cutting auxiliary line can be formed.

  As another aspect of the present invention, the horn, the receiving material, and the film may be relatively moved while tension is applied to the film in the other direction. In this way, when ultrasonic waves are 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 (width) of the receiving material. Will be pushed away in both directions). Thus, the film is present to those in the corresponding portion of the tip portion of the receiving material while becomes thin, the ridges on both sides has raised the thinned portion.

  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, an elongated and deep groove-shaped cutting auxiliary line is formed between the raised portions close to each other.

  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 at least one of the front end portions sandwiching the film together with the horn. The film and the horn sandwiched between the film and the receiving material are formed in the one direction so that the width of the direction becomes narrower toward the tip, and the movement trajectory of the receiving material on the film is curved. The relative movement is also performed in the one direction while the relative movement is performed in another direction orthogonal to the first direction.

  According to the cutting auxiliary line forming method of the above configuration, since the receiving material is formed so that the width in at least one direction of the tip part sandwiching the film together with the horn is narrowed toward the tip, the ultrasonic wave is applied to the horn. The film sandwiched between the receiving material and the horn is melted in accordance with the shape of the front end portion of the receiving material by ultrasonic vibration energy. Then, the film, the horn sandwiching the film, and the receiving material are moved relative to each other in the other direction orthogonal to the one direction so that the movement trajectory of the receiving material on the film is curved. Since the film is also relatively moved in the direction, the film is melted corresponding to the shape and movement locus of the front end portion of the receiving material, and the cutting auxiliary lines arranged in a curved shape on the film can be formed.

  As one aspect of the method for forming auxiliary cutting lines according to the present invention, the film and the horn sandwiched between the film and the receiving material so that the movement trajectory of the tip of the receiving material on the film has a wavy shape that undulates at a constant period And the horn and the receiving material may be reciprocated by a predetermined amount of movement in the one direction. Thus, it is possible to form the auxiliary cutting line of the film on the receiving material of the tip wavy shape corresponding to the moving locus of the (shaped curve undulating in a substantially constant period).

  As another aspect of the cutting auxiliary line forming method according to the present invention, the tip is formed in an arc shape or an annular shape centered on a virtual line extending in one direction, and the tip of the tip is centered on the virtual line. The one direction and the other direction of the receiving material formed with an arc-shaped or annular ridge line so that the ridge line extends in a tangential direction with respect to the trajectory of the front end portion of the receiving material corresponding to the planned formation position of the auxiliary cutting line. It is preferable to rotate around a rotation axis extending in a direction orthogonal to the one direction and the other direction in correspondence with at least one of the movements. In this way, when the tip of the receiving material is worn (consumed) with the formation of the auxiliary cutting line, the receiving material is simply rotated around the virtual line (center) without replacing the entire receiving material. Thus, the appropriately shaped part (appropriately tapered part) of the tip can be made to face the horn.

  Then, as described above, when the tip portion is formed in an arc shape or an annular shape, the contact portion of the receiving member with respect to the film has a width in the extending direction of the ridge line. When the horn and the receiving material sandwiching the film are moved relative to each other in the other direction orthogonal to the one direction, the film melted by application of ultrasonic waves extends the ridgeline by the tip. There is a possibility of being pushed in the direction crossing the direction.

  However, in the cutting auxiliary line forming method of the present invention, the receiving material is placed in the one direction and the other so that the ridge line extends in the tangential direction with respect to the track of the tip of the receiving material corresponding to the planned cutting auxiliary line formation position. Corresponding to the movement of at least one of the directions, the film is rotated around the rotation axis extending in the direction orthogonal to the one direction and the other direction, so that the melted portion of the film is not pushed to the tip, and proper cutting is performed. An auxiliary line can be formed.

  As another aspect of the present invention, the film, the horn, and the receiving material may be relatively moved while tension is applied to the film in the other direction. In this way, when ultrasonic waves are 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 (width) of the receiving material. Will be pushed away in both directions). As a result, the film becomes a raised portion where both sides of the thin-walled portion are raised while the portion corresponding to the portion where the tip of the receiving member is present is thin.

  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, an elongated and deep groove-shaped cutting auxiliary line is formed between the raised portions close to each other.

  As described above, according to the auxiliary cutting line forming apparatus according to the present invention, an excellent effect of groove-shaped auxiliary cutting line capable cut the film can be formed in a curved shape with respect to the film .

  Moreover, according to the cutting auxiliary line formation method which concerns on this invention, the outstanding effect that the groove-shaped cutting auxiliary line which can cut | disconnect a film can be formed in curve shape with respect to this film can be show | played.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the packaging material for rice balls in which the cutting auxiliary line was formed with the cutting auxiliary line formation apparatus and cutting auxiliary line formation method which concern on one Embodiment of this invention, (a) shows an exploded perspective view, (B) shows an overall perspective view. It is explanatory drawing of the inner film of the packaging material shown in FIG. 1, Comprising: The top view containing the partial expanded sectional view of a cutting auxiliary line periphery is shown. It is explanatory drawing of the outer film of the packaging material shown in FIG. 1, Comprising: The top view containing the partial expanded sectional view of a cutting auxiliary line periphery is shown. The perspective view for demonstrating the method of packaging a rice ball with the packaging material which concerns on the embodiment is shown. The perspective view of the state which packaged the rice ball with the packaging material which concerns on the embodiment is shown. The conceptual diagram of the manufacturing apparatus of the packaging material which concerns on the embodiment is shown. It is explanatory drawing of the cutting auxiliary line formation part (cutting auxiliary line formation apparatus) in the manufacturing apparatus of the packaging material which concerns on the embodiment, Comprising: (a) is provided on the 1st conveyance path (conveyance path for outer films). The perspective view of the obtained 1st cutting auxiliary line formation part is shown, (b) shows the perspective view of the 2nd cutting auxiliary line formation part provided on the 2nd conveyance path (conveyance path for inner films). It is explanatory drawing of the state in which a cutting auxiliary line is formed in the cutting auxiliary line formation part (cutting auxiliary line formation apparatus) in the manufacturing apparatus of the packaging material which concerns on the same embodiment, Comprising: (a) is the 1st cutting auxiliary line formation. Shows a state in which the film is sandwiched between the horn and the receiving material of the part, (b) shows the state of the raised portion by the action of the tension by the conveying means of the first cutting auxiliary line forming part, (c), The state which pinched | interposed the film with the horn and receiving material of a 2nd cutting auxiliary line formation part is shown, (d) shows the state by which the protruding part is inside by the effect | action of the tension | tensile_strength by the conveyance means of a 2nd cutting auxiliary line formation part. The perspective view of the horn and receiving material which are employ | adopted for the cutting auxiliary line formation apparatus and cutting auxiliary line formation method which concern on another embodiment of this invention is shown. It is explanatory drawing of the cutting auxiliary line formation apparatus and cutting auxiliary line formation method which concern on other embodiment of this invention, Comprising: The state which forms the cutting auxiliary line extended in the transversal direction of a film is shown.

  Hereinafter, a cutting auxiliary line forming apparatus and a cutting auxiliary line forming method according to an embodiment of the present invention will be described with reference to the accompanying drawings. In the present embodiment, a case where the present invention is used in a manufacturing facility for packaging materials for rice balls (hereinafter simply referred to as packaging materials) will be described as an example.

  Prior to the description of the cutting auxiliary line forming apparatus and the cutting auxiliary line forming method, the packaging material will be described. The packaging material can be separated in the width direction as shown in FIGS. 1 (a) and 1 (b). An inner film 50 configured and an outer film 51 superimposed on the inner film 50 with the sheet-like food S interposed therebetween, and an outer peripheral end of the inner film 50 and an outer circumference of the outer film 51 so as to surround the sheet-like food S The ends are welded together. In each figure, a region to which dots are attached is shown as a welded region or a welded region.

  As shown in FIG. 2, the inner film 50 is composed of a single film, and passes straight through the substantially center in the width direction and is perpendicular to the direction perpendicular to the width direction (hereinafter, this direction is referred to as the length direction). An extending auxiliary cutting line 500 is formed. That is, the inner film 50 is formed of a rectangular film, and a linear cutting auxiliary line 500 extending in the longitudinal direction through the approximate center in the short direction perpendicular to the longitudinal direction is formed.

  The cutting auxiliary line 500 is formed in a groove shape, and the inner film 50 has a thin portion where the cutting auxiliary line 500 is formed. That is, in the inner film 50, the portion corresponding to the cutting auxiliary line 500 is thinner than the initial thickness (the thickness of the film that becomes the inner film 50).

  In the inner film 50 according to the present embodiment, raised portions 501 and 501 that are raised along the auxiliary cutting line 500 are formed on both sides of the auxiliary cutting line 500. The raised portions 501 and 501 of the inner film 50 are thicker than the initial thickness (the thickness of the film that becomes the inner film 50), as opposed to the portion corresponding to the cutting assisting line 500 (the thinned portion). It has become. Thereby, the inner film 50 ensures the depth of the cutting auxiliary line 500, and the strength of both sides of the cutting auxiliary line 500 is stronger than the other parts.

  As shown in FIG. 3, the outer film 51 is composed of a single film, and is formed with two auxiliary cutting lines 510 and 510 extending in the length direction with a gap in the width direction. That is, the outer film 51 is formed of a rectangular film so as to correspond to the inner film 50, and two cutting auxiliary lines 510, 510 extending in the longitudinal direction at intervals in the short direction perpendicular to the longitudinal direction. Is formed.

  The two strips of auxiliary cutting lines 510 and 510 are both formed in a curved shape on one surface of the outer film 51. Specifically, the two cutting auxiliary lines 510 and 510 are arranged in a wavy shape so as to form a portion that approaches each other and a portion that is separated from each other in the width direction of the outer film 51. That is, in the packaging material 5 according to this embodiment, the two cutting auxiliary lines 510 and 510 are wavy, and are symmetrically arranged with respect to the center line CL extending in the center in the width direction of the outer film 51.

  The auxiliary cutting line 510 formed on the outer film 51 is also formed in a groove shape. Thereby, as for the outer film 51, the site | part in which the cutting auxiliary line 510 was formed becomes thin. That is, the outer film 51 has a portion corresponding to the cutting auxiliary line 510 thinner than the initial thickness (the thickness of the film for packaging material 5 that becomes the outer film 51).

  And the outer film 51 which concerns on this embodiment is formed with the protruding parts 511 and 511 which swell along the auxiliary cutting line 510 on both sides of the auxiliary cutting line 510, similarly to the inner film 50. The raised portions 511, 511 of the outer film 51 are thicker than the original thickness (the thickness of the film that becomes the outer film 51), as opposed to the portion corresponding to the cutting auxiliary line 510 (the thinned portion). It has become. Thereby, the outer film 51 ensures the depth of the cutting assisting line 510 and the strength of both sides of the cutting assisting line 510 is stronger than the other parts.

  And since the packaging material 5 which concerns on this embodiment is provided with the cutting | disconnection auxiliary | assistant line 500 of the 1st line | wire in the inner film 50 and the cutting | disconnection auxiliary line | wires 510 and 510 of the 2nd line | wire in the outer film 51, the inner film 50 is As shown in FIG. 2, one notch 502 is provided at each end of the inner film 50 so as to correspond to both ends of the cutting auxiliary line 500, and the outer film 51 has two strips of auxiliary cutting as shown in FIG. Two notches 512 and 512 are provided at each end of the outer film 51 so that the ends of the lines 510 and 510 are interposed. The notch 502 of the inner film 50 is formed by a notch, while the notch 512 of the outer film 51 is formed by cutting.

  Along with this, the inner film 50 and the outer film 51 are notched 512 in the outer film 51 in a state where the inner film 50 and the outer film 51 are overlapped with each other via a sheet-like food S such as seaweed as shown in FIGS. 1 (a) and 1 (b). , 512 are welded so as to surround the sheet-like food S except for the space between them. Thereby, as for the packaging material 5 which concerns on this embodiment, the welding part (area | region which attached | subjected the dot in the figure) to which the inner film 50 and the outer film 51 were welded mutually was formed over the perimeter of the outer periphery. .

  The packaging material 5 which concerns on this embodiment consists of the above structure, Then, the packaging method and opening method of the rice ball by the packaging material 5 of the said structure are demonstrated.

  First, as shown in FIG. 4, a rice ball R is placed on the inner film 50, and the entire packaging material 5 is folded in the longitudinal direction so as to wrap the rice ball R. That is, the entire packaging material 5 is folded in the longitudinal direction so that both ends of the inner film 50 in the longitudinal direction overlap each other. Thus, by folding the packaging material 5 in half, both end portions in the length direction of the inner film 50 overlap each other, and both end portions in the width direction of the inner film 50 are folded back to one end side in the length direction. And the other end side overlap each other.

  Then, as shown in FIG. 5, the entire packaging material 5 overlap by folio (opposing) the ends of the welding of the film 50 (sealing). At this time, both end portions in the length direction of the inner film 50 are welded except for the notches 512 and 512 provided at the respective end portions of the outer film 51 so that the inside and outside do not communicate with each other when the rice ball R is packaged. Is done. Each notch 502 of the inner film 50 is formed such that the edge of the film defining the notch 502 and the cutting auxiliary line 500 are continuous, and both end portions in the length direction of the inner film 50 are welded to each other. When the auxiliary cutting line 500 is included in the region, the unsealing property is deteriorated. Therefore, the two end portions in the length direction of the inner film 50 are welded so as not to include the auxiliary cutting line 500 as much as possible.

  And as above-mentioned, when the edge parts of the inner film 50 are welded, the packaging material 5 is the state which packaged the rice ball R in the state (isolated state) which separated the rice ball R and the sheet-like food S with the inner film 50. become.

  On the other hand, in order to open the packaging material 5 in which the rice ball R is packaged, the packaging material 5 is pulled in the length direction with the gap between the notches 512 and 512 at either one end of the outer film 51. If it does so, the outer film 51 will be cut | disconnected along the two cutting assistance lines 510 and 510, and the outer film 51 between the two cutting assistance lines 510 and 510 will be cut off as a result. After that, when the packaging material 5 is pulled in the width direction while holding both ends of the inner film 50 and the outer film 51 in the width direction (pulling so as to separate both sides of the notch 502), the pulling force is applied to the notch 502 of the inner film 50. concentrate. Then, the notch 502 (the boundary (intersection) between the edge defining the notch and the cutting auxiliary line 500) is the starting point, and the inner film 50 is split into two in the short direction while being cut along the cutting auxiliary line 500, It is pulled out from between the rice ball R and the sheet-like food S.

  In the packaging material 5 according to the present embodiment, as described above, the two cutting auxiliary lines 510 and 510 formed on the outer film 51 are each wavy, and the center positions of the inner film 50 and the outer film 51 in the length direction. In the vicinity of the center position, the distance between both cutting auxiliary lines 510 and 510 is maximized. Therefore, as described above, most of the sheet-like food S is exposed to the outside by cutting between the two cutting auxiliary lines 510 and 510.

  Therefore, the overlap between the outer film 51 and the sheet-like food S is reduced, and when the inner film 50 is divided into two while being cut by the cutting auxiliary line 500 (drawn from between the rice ball R and the sheet-like food S), Since contact resistance with the outer film 51 is less likely to occur in the sheet-like food S, it is possible to prevent the sheet-like food S from being broken when the inner film 50 is pulled out.

  And since the packaging material 5 which concerns on this embodiment has the raised parts 501,501,511,511 which increased intensity | strength on the both sides of the cutting auxiliary lines 500 and 510 of the inner film 50 and the outer film 51 (FIG. 2 and FIG. 3), when the inner film 50 and the outer film 51 are torn as described above, the tears (cutting lines) get over the raised portions 501, 501, 511, and 511 and come off from the cutting auxiliary lines 500 and 510. Both films are cut cleanly along the cutting auxiliary lines 500 and 510.

  Next, referring to FIG. 6, a manufacturing facility for the packaging material 5 including a cutting auxiliary line forming device that forms the cutting auxiliary lines 500 and 510 for the film that becomes the inner film 50 and the film that becomes the outer film 51. explain.

  The manufacturing facility 1 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 51 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 50, and a conveyance path (hereinafter referred to as this conveyance path) that conveys the longitudinal film F2 in the longitudinal direction. Is referred to as a second transport path) R2.

  In both the first transport path R1 and the second transport path R2, the longitudinal direction of the long films F1, F2 corresponds to the length direction of the inner film 50 and the outer film 51, and the longitudinal direction of the long films F1, F2 The transverse direction perpendicular to each other coincides with the width direction of the inner film 50 and the outer film 51. That is, the 1st conveyance path | route R1 conveys the 1st elongate film F1 in which the some outer film 51 continues in a length direction in a longitudinal direction (length direction), and 2nd conveyance path | route R2 is a some inner film. The second long film F2 in which 50 is continuous in the length direction is conveyed in the longitudinal direction (length direction).

  And on the 1st conveyance path | route R1, the cutting auxiliary line formation apparatus 10 (henceforth the 1st cutting auxiliary line formation part 10) which forms the cutting auxiliary line 510 in the 1st elongate film F1, and a 2nd elongate film The film superposition | polymerization part 12 which overlaps the 1st long film F1 on F2, the film welding part 13 which welds the 1st long film F1 to the 2nd long film F2, the 1st by which the 2nd long film F2 was welded. A film cutting portion 14 is provided that cuts the long film F1 into a predetermined size (length) together with the second long film F2 to form a sheet-like packaging material 5.

  And 1st conveyance path | route R1 which concerns on this embodiment is the 1st cutting auxiliary line formation part 10, the film superposition | polymerization part 12, the film welding part 13, and the film cutting part from the upstream of the conveyance direction of the 1st elongate film F1. These are arranged in the order of 14.

  On the other hand, on the second transport path R2, a cutting auxiliary line forming device 20 (hereinafter referred to as a second cutting auxiliary line forming unit 20) that forms the cutting auxiliary line 500 on the second long film F2, the second long The food placing part 21 for placing the sheet-like food S on the long film F2, the film polymerization part 22 for superposing the second long film F2 on the first long film F1, and the second on the first long film F1. A film welding portion 23 for welding the long film F2 and a second long film F2 to which the first long film F1 is welded are cut into a predetermined size (length) together with the first long film F1, and are in the form of a single wafer. A film cutting part 24 to be used as the packaging material 5 is provided.

  And 2nd conveyance path | route R2 which concerns on this embodiment is the 2nd cutting auxiliary line formation part 20, the food mounting part 21, the film superposition | polymerization part 22, and film welding from the upstream of the conveyance direction of the 2nd long film F2. These are arranged in the order of the part 23 and the film cutting part 24.

  That is, in the manufacturing facility 1 according to the present embodiment, the first cutting auxiliary line forming unit 10 of the first transport path R1 and the second cutting auxiliary line forming unit 20 of the second transport path R2 are independent paths, The film superposition | polymerization part 12, the film welding part 13, and the film cutting part 14 which are downstream from the 1st cutting auxiliary line formation part 10 of 1 conveyance path | route R1, and the food mounting part 21 (2nd cutting | disconnection of 2nd conveyance path R2) The film polymerization part 22, the film welding part 23, and the film cutting part 24 on the downstream side of the auxiliary line forming part 20) are formed to have a common configuration overlapping each other.

  The first cutting auxiliary line forming unit 10 and the second cutting auxiliary line forming unit 20 each have a groove-shaped cutting auxiliary line with respect to the long films (first long film F1 and second long film F2) by ultrasonic waves. 500, 510 are formed. That is, the first auxiliary cutting line forming unit 10, the auxiliary cutting line 510 for the outer film 51 with respect to the first elongated film F1 is formed by ultrasonic, the second auxiliary cutting line forming unit 20, the second long The auxiliary cutting line 500 for the inner film 50 is formed by ultrasonic waves on the length film F2.

  As shown in FIG. 7A, the first auxiliary cutting line forming unit 10 includes a horn 100 to which an ultrasonic wave having a predetermined frequency is applied, and a receiving material 110 disposed so as to face the horn 100. .

  The first cutting auxiliary line forming unit 10 melts the first long film F1 by applying ultrasonic waves to the horn 100 in a state where the first long film F1 is sandwiched between the horn 100 and the receiving material 110. A groove-shaped cutting auxiliary line 510 is formed on the first long film F1.

  The horn 100 includes a horn main body 101 to which an ultrasonic oscillator (not shown) is connected, and a first film contact portion 102 connected to the horn main body 101. The first film contact portion 102 is formed in a columnar shape, one end is connected to the horn body 101, 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 110 is formed so that the width | variety of the front-end | tip part (2nd film contact part 112 mentioned later) which pinches | interposes the 1st long film F1 with the horn 100 becomes narrow as the width | variety of one direction goes to a front-end | tip. . The receiving material 110 according to the present embodiment is formed in an arc shape or an annular shape in which the second film contact portion 112 has an imaginary line SL extending in one direction as a center of curvature, and the tip of the second film contact portion 112 is the aforementioned An arcuate or annular ridgeline L centering on the virtual line SL is formed.

  More specifically, the receiving material 110 according to the present embodiment includes a disk-shaped receiving material body 111 and a second film contact portion 112 that protrudes radially outward from the entire outer periphery of the receiving material body 111. And. The receiving material 110 has support shafts 113 projecting from both ends of the receiving material main body 111 so as to pass through the center of the receiving material main body 111 (virtual line SL).

  Accordingly, the first auxiliary cutting line forming unit 10 of the present embodiment includes a receiving material support 120 that supports the receiving material 110. The receiving material support 120 includes a pair of shaft supporting portions 121 and 121 that support supporting shafts 113 and 113 protruding from both ends of the receiving material main body 111 and a connecting portion 122 that connects the pair of shaft supporting portions 121 and 121 to each other. And the whole is U-shaped.

  The receiving material support 120 has a rotating shaft 123 extending in the direction perpendicular to the supporting shafts 113, 113 extending above the connecting portion 122. The rotating shaft 123 is pivotally supported by a support body 132a of a receiving material guide means 132 described later. Thereby, the receiving material 110 according to the present embodiment can rotate a part of the second film contact portion 112 of the horn 100 in a state where the receiving material 110 can rotate around the rotation shaft 123 extending in a direction orthogonal to the support shafts 113, 113. It is arranged in a state facing the film contact portion 102.

  The 2nd film contact part 112 which concerns on this embodiment is formed in cross-sectional triangular prism shape, and the ridgeline L in which the vertex is formed continuously is along the other direction orthogonal to one direction. The second film contact portion 112 according to the present embodiment is formed such that both surfaces in the width direction (one direction) form an obtuse angle. That is, the second film contact portion 112 according to the present embodiment is inclined such that two surfaces (both surfaces in the width direction) other than the one surface connected to the receiving material main body 111 approach each other as they go from the receiving material main body 111 side to the tip. The interior angle of both inclined surfaces is set to an obtuse angle.

  And the extension amount of both surfaces (both inclined surfaces) of the width direction is set substantially the same. Thereby, the 2nd film contact part 112 which concerns on this embodiment is a cross-sectional substantially isosceles triangle.

  And the 1st cutting auxiliary line formation part 10 is 1st long film F1 (film) so that the movement locus | trajectory of the 2nd film contact part 112 of the receiving material 110 on the 1st long film F1 may become curvilinear. ) And the horn 100 and the receiving material 110 sandwiching the first long film F1 are moved relative to each other in the other direction orthogonal to the one direction (the direction matching the width direction of the second film contact portion 112). It is configured to move relative to the direction. The first cutting auxiliary line forming unit 10 according to the present embodiment has a wavy shape in which the movement trajectory of the second film contact portion 112 of the receiving material 110 on the first long film F1 undulates at a constant period. While relatively moving the first long film F1 and the horn 100 and the receiving material 110 sandwiching the first long film F1 in the other direction, the horn 100 and the receiving material 110 are moved in a predetermined direction in the one direction. It is configured to reciprocate.

  More specifically, the first auxiliary cutting line forming unit 10 according to the present embodiment includes a conveying means (not shown) for conveying the first long film F1 in addition to the horn 100 and the receiving material 110, and the horn 100. And a moving means 130 for moving the receiving material 110 in the one direction (a direction orthogonal to the conveying direction of the first long film F1).

  Thereby, the 1st cutting auxiliary line formation part 10 which concerns on this embodiment pinched | interposed the 1st long film F1 and this 1st long film F1 by the conveyance (movement) of the longitudinal direction of the 1st long film F1. The horn 100 and the receiving material 110 are moved relative to each other in the other direction, and the horn 100 and the receiving material 110 are moved by the moving means 130 to sandwich the first long film F1 and the first long film F1. 100 and the receiving material 110 in the one direction (the short direction of the first long film F1) is realized.

  In the present embodiment, as described above, the cutting assisting line 510 of the outer film 51 must be formed in a wavy shape. Therefore, the moving means 130 moves the horn 100 and the receiving material 110 to the second film contact portion 112 ( It is made to reciprocate by a predetermined amount of movement in the one direction that coincides with the width direction of the front end portion of the receiving member 110.

  Here, the moving means 130 will be described. The moving means 130 according to this embodiment includes a horn guiding means 131 for guiding the horn 100 in one direction, a receiving material guiding means 132 for guiding the receiving material 110 in one direction, and a horn. 100 and reciprocating drive means 133 that reciprocates the receiving material 110 in one direction in synchronization. The horn guiding means 131 and the receiving material guiding means 132 are configured in the same manner. The supporting bodies 131a and 132a to which the horn 100 or the receiving material 110 (receiving material support body 120) is fixed, and the supporting bodies 131a and 132a. The rails 131b and 132b guide in one direction.

  The reciprocating drive means 133 may employ a link mechanism that reciprocates the support 131a of the horn guide means 131 and the support 132a of the receiving material guide means 132, or an actuator such as an electric cylinder or an air cylinder. In the embodiment, an air cylinder is employed.

  The reciprocating drive means 133 may move the support body 131a of the horn guide means 131 and the support body 132a of the receiving material guide means 132 together. However, in this embodiment, the reciprocating drive means 133 supports the horn guide means 131. An air cylinder 133 a that moves (reciprocates) the body 131 a in one direction and an air cylinder 133 b that moves (reciprocates) the support 132 a of the receiving material guiding means 132 in one direction are provided as the reciprocating drive means 133. .

  The air cylinder 133a that moves (reciprocates) the support 131a of the horn guide means 131 in one direction is connected to the support 131a of the horn guide means 131, and the cylinder end is a frame that constructs the manufacturing equipment 1 ( (Not shown) is connected directly or indirectly. On the other hand, the air cylinder 133b that moves (reciprocates) the support 132a of the receiving material guiding means 132 in one direction is connected to the support 132a of the receiving material guiding means 132, and the cylinder end is the manufacturing equipment. It is directly or indirectly connected to a frame (not shown) that constructs 1.

  And since the reciprocating drive means 133 which concerns on this embodiment is comprised by the independent air cylinders 133a and 133b, both the air cylinders 133a and 133b expand and contract in synchronization. Thereby, the horn 100 and the receiving material 110 reciprocate in one direction in synchronization.

  And the 1st cutting auxiliary line formation part 10 which concerns on this embodiment does not reciprocate the horn 100 and the receiving material 110 to one direction, but the 2nd of the receiving material 110 corresponding to the formation scheduled position of the cutting auxiliary line 510 is. A rotating shaft 123 that extends the receiving material 110 in a direction orthogonal to the one direction and the other direction corresponding to the movement in one direction so that the ridge line L extends in the tangential direction with respect to the curved track of the film contact portion 112. It is configured to rotate around.

  That is, the first cutting auxiliary line forming unit 10 includes a rotation driving unit 134 for rotating the receiving material support 120 around the rotation shaft 123. The rotation driving means 134 can employ a link mechanism that reciprocally rotates the receiving material support 120 and an actuator such as an electric cylinder or an air cylinder. In the present embodiment, an air cylinder is employed. The air cylinder 134 has a rod end pivotally connected to the connecting portion 122 of the receiving material support 120, and a cylinder end connected to the supporting body 132a of the receiving material guiding means 132 (an extending portion 135 extending from the supporting body 132a). It is pivotally attached. Thereby, the rotation driving means (air cylinder) 134 reciprocates and rotates the receiving material 110 (receiving material support 120) around the rotation shaft 123 by extending and contracting (switching the rotation direction at every predetermined rotation angle). It has become.

  The rotation driving means 134 is interlocked with the reciprocating driving means 133 (air cylinders 133a and 133b), and when the reciprocating driving means 133 reciprocates the horn 100 and the receiving material 110 in one direction, the receiving material. The receiving material 110 is rotated such that the direction of 110 (the rotation angle around the rotation shaft 123) corresponds to the position of the horn 100 and the receiving material 110 in one direction. That is, the rotation driving means 134 is configured so that the ridge line L of the receiving material 110 extends in a tangential direction with respect to the curved trajectory of the second film contact portion 112 of the receiving material 110 corresponding to the planned formation position of the auxiliary cutting line 510. The receiving material 110 is rotated around the rotation shaft 123.

  And the 1st cutting auxiliary line formation part 10 is the other direction (the 1st elongate film which corresponds with the direction where the ridgeline L of the 2nd film contact part 112 is extended) orthogonal to the said one direction with respect to the 1st elongate film F1. The horn 100, the receiving material 110, and the first long film F1 are moved relative to each other while applying a tension T in the longitudinal direction of F1.

  Specifically, the first cutting auxiliary line forming unit 10 according to the present embodiment serves as the first long film on the upstream side and the downstream side of the horn 100 and the receiving material 110 as a conveying unit that conveys the first long film F1. A pair of rollers (not shown) for pressure-conveying the film F1 is provided. And these roller pairs differ in the conveyance speed which conveys the 1st long film F1, and the tension | tensile_strength T is made to act on the 1st long film F1 with the conveyance speed by this roller pair. That is, the conveying means of the first cutting auxiliary line forming unit 10 is configured such that the roller pair disposed on the upstream side of the horn 100 and the receiving material 110 conveys the first long film F1 more than the roller pair disposed on the downstream side. Is set so as to cause the tension T to act on the first long film F1.

  In the present embodiment, as described above, since the two cutting auxiliary lines 510 and 510 must be formed on the outer film 51, the first cutting auxiliary line forming unit 10 includes a horn as shown in FIG. 100, receiving material 110, moving means 130 (reciprocating driving means 133), and rotational driving means 134 are provided in pairs.

  As shown in FIG. 7B, the second cutting auxiliary line forming unit 20 is opposed to the horn 200 and the horn 200 to which an ultrasonic wave having a predetermined frequency is applied, like the first cutting auxiliary line forming unit 10. The second long film F2 is provided by applying ultrasonic waves to the horn 200 in a state where the second long film F2 is sandwiched between the horn 200 and the receiving material 210. It melt | dissolves and forms the groove-shaped cutting auxiliary line 500 on this 2nd elongate film F2.

  The horn 200 and the receiving material 210 of the second cutting auxiliary line forming unit 20 have the same shape as the horn 100 and the receiving material 110 of the first cutting auxiliary line forming unit 10. That is, 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 101. 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 second long film F2.

  On the other hand, the receiving material 210 is formed so that the width | variety of at least one direction of the front-end | tip part (2nd film contact part 212 mentioned later) which pinches | interposes a film with the horn 200 becomes narrow as it goes to a front-end | tip. The receiving material 210 according to the present embodiment is formed in an arc shape or an annular shape with the center of curvature of a virtual line SL in which the second film contact portion 212 extends in one direction, and the tip of the second film contact portion 212 is the aforementioned An arcuate or annular ridgeline L centering on the virtual line SL is formed.

  More specifically, the receiving material 210 according to the present embodiment includes a disk-shaped receiving material body 211 and a second film contact portion 212 that protrudes radially outward from the entire outer periphery of the receiving material body 211. And. The receiving material 210 has support shafts 213 and 213 protruding from both ends of the receiving material body 211 so as to pass through the center of the receiving material body 211.

  In connection with this, the 2nd cutting auxiliary line formation part 20 of this embodiment is provided with the receiving material support body 220 which supports the receiving material 210. FIG. The receiving material support 220 includes a pair of shaft support portions 221 and 221 that support the support shafts 213 and 213 projecting from both ends of the receiving material body 211 and a connection portion 222 that connects the pair of shaft support portions 221 and 221 to each other. And the whole is U-shaped.

  The 2nd film contact part 212 which concerns on this embodiment is formed in cross-sectional triangular prism shape, and the ridgeline L in which the vertex is formed continuously is along the other direction orthogonal to one direction. The second film contact portion 212 according to this embodiment is formed such that both surfaces in the width direction form an obtuse angle. That is, the second film contact portion 212 according to the present embodiment is inclined such that two surfaces (both surfaces in the width direction) other than the one surface connected to the receiving material body 211 approach each other as they go from the receiving material body 211 side to the tip. The interior angle of both inclined surfaces is set to an obtuse angle.

  And the extension amount of both surfaces (both inclined surfaces) of the width direction is set substantially the same. Thereby, the 2nd film contact part 212 which concerns on this embodiment is a cross-sectional substantially isosceles triangle. In addition, the second film contact portion 212 according to the present embodiment is formed with a band-shaped surface that connects the tips of both sides in the width direction, but because the dimension of the band-shaped surface in the width direction is very small, The cross-sectional shape is substantially triangular.

  In the second cutting auxiliary line forming portion 20, the horn 200 and the receiving material 210 are fixed at fixed positions. That is, the receiving material 210 of the second cutting auxiliary line forming unit 20 is such that the ridge line L coincides with the longitudinal direction of the second long film F2 and is positioned at the approximate center in the short direction of the second long film F2. It is fixed to. Accordingly, the horn 200 is fixed so that the first film contact portion 202 faces the second film contact portion 212 of the receiving material 210.

  And also about the 2nd cutting auxiliary line formation part 20, while making tension T act on the other direction (conveying direction of the 2nd long film F2) orthogonal to the said 1 direction with respect to the 2nd long film F2, horn 200 and the receiving material 210 and the second long film F2 are relatively moved in the other direction.

  Specifically, the second cutting auxiliary line forming unit 20 according to the present embodiment is also provided with a transport unit (not shown) that transports the second long film F2. Such conveying means is constituted by a pair of rollers that convey the second long film F2 by pressure on the upstream side and the downstream side of the horn 200 and the receiving material 210. And these roller pairs differ in the conveyance speed which conveys the 2nd long film F2, and the tension | tensile_strength T is made to act on the 2nd long film F2 by the conveyance speed difference by this roller pair. In other words, the conveying means of the second cutting auxiliary line forming unit 20 is configured such that the roller pair disposed on the upstream side of the horn 200 and the receiving material 210 conveys the second long film F2 more than the roller pair disposed on the downstream side. Is set so as to cause a tension T to act on the second long film F2.

  In the present embodiment, as described above, since a single cutting auxiliary line 500 is formed on the inner film 50, the second cutting auxiliary line forming unit 20 is provided with only one set of the horn 200 and the receiving material 210. It has been.

  Returning to FIG. 6, the food placing portion 21 on the second transport path R2 arranges the sheet-like food S on the cutting auxiliary line 500 formed on the second long film F2 (the second long film F2). It is supposed to be. As described above, the film superimposing units 12, 22, the film welding units 13, 23, and the film cutting units 14, 24 of the first transport path R1 and the second transport path R2 are the first transport path R1 and the second transport path R2. The film superposition | polymerization parts 12 and 22 are both path | routes because the 1st conveyance path | route R1 and the 2nd conveyance path | route R2 overlap in the downstream of the food mounting part 21 on the 1st conveyance path | route R1. The first long film F <b> 1 and the second long film F <b> 2 conveyed above are overlapped with each other via the sheet-like food S.

  The film welded portions 13 and 23 are 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 (overlapping first and second films F1 and 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 two long films F2. The said film cutting parts 14 and 24 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 5. FIG. Although not particularly mentioned here, the notches 502 and 512 formed in the outer film 51 and the inner film 50 correspond to the cutting positions cut by the film cutting unit 14 before the long films F1 and F2 are overlapped with each other. Are formed as cuts or notches.

  Next, the manufacturing method (cutting auxiliary line forming method) of the packaging material 5 according to the present embodiment will be described. The manufacturing equipment 1 used for 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. And the two cutting auxiliary lines 510 and 510 are formed with respect to the 1st long film F1 in the 1st cutting auxiliary line formation part 10, and with respect to the 2nd long film F2 in the 2nd cutting auxiliary line formation part 20. A single cutting auxiliary line 500 is formed.

  The 1st cutting auxiliary line formation part 10 and the 2nd cutting auxiliary line formation part 20 of this embodiment form the cutting auxiliary lines 500 and 510, conveying each elongate film F1, F2 continuously to a longitudinal direction.

  Specifically, in the first cutting auxiliary line forming unit 10, the first long film F1 is conveyed in the longitudinal direction with each pair of the horn 100 and the receiving material 110 sandwiching the first long film F1. . Then, by generating ultrasonic waves in the horn 100, the ultrasonic waves are transmitted to the receiving material 110 via the first long film F1, and as a result, as shown in FIG. The long film F1 melts along the second film contact portion 112 of the receiving material 110, and the portion where the second film contact portion 112 exists becomes thinner than the surroundings.

  And, as described above, the horn 100 and the receiving material 110 and the first long film F1 are relatively moved in the other direction orthogonal to one direction by the conveyance in the longitudinal direction of the first long film F1, The movement of the horn 100 and the receiving material 110 in one direction by the moving means 130 causes the horn 100 and the receiving material 110 and the first long film F1 to move relative to each other in one direction. That is, the expansion and contraction of the reciprocating drive means 133 (air cylinders 133a, 133b) of the moving means 130 causes the horn 100 and the receiving material 110 to decelerate after accelerating the moving speed in each of the forward and return paths in one direction. Reciprocates quantitatively. As a result, the relative movement of the first long film F1, the horn 100 and the receiving material 110 in one direction and the other direction causes the front end portion (second film) of the receiving material 110 on the first long film F1. Since the movement locus of the contact portion 112) is wavy, the portion where the first long film F1 is melted along the second film contact portion 112 of the receiving material 110 (the thinned portion) is the second film contact portion. Corresponding to the movement trajectory 112, the wavy lines are formed in order.

  As the receiving material 110 reciprocates in one direction as described above, the second film contact portion 112 of the receiving material 110 corresponding to the planned formation position of the cutting assisting line 510 formed on the first long film F1. The receiving material 110 rotates about a rotation axis 123 extending in a direction orthogonal to the one direction and the other direction in response to the movement in one direction so that the ridge line L extends in a tangential direction with respect to the trajectory. That is, when the receiving material 110 reciprocates in one direction, the rotation driving means (air cylinder) 134 expands and contracts in response to the reciprocating motion (movement) of the receiving material 110, and the ridge line L of the receiving material 110 becomes the cutting auxiliary line 510. The receiving material 110 rotates around the rotation shaft 123 so as to extend in a tangential direction with respect to the formation position (wavy line trajectory).

  As a result, the second film contact portion 112 that moves relative to the first long film F1 pushes the melted portion of the first long film F1 (the portion raised by being pushed up on both sides) in an oblique direction with respect to the ridge line L. This prevents the thinned portion from being inadvertently extended.

  That is, when the second film contact portion 112 (ridge line L) is formed in an arc shape or an annular shape like the receiving material 110 according to the present embodiment, the first length of the second film contact portion 112 (tip) of the receiving material 110 is set. The contact portion with respect to the long film F1 has a width in the direction in which the ridge line L extends. As described above, the first long film F1, the horn 100 and the receiving material 110 sandwiching the first long film F1, When the relative movement is performed in the other direction orthogonal to the one direction, the first long film F1 melted by the application of ultrasonic waves is extended in the direction in which the ridge line L extends by the second film contact portion 112. On the other hand, it may be pushed in the crossing direction.

  However, in the present embodiment, the ridge line L is tangential to the trajectory of the second film contact portion 112 of the receiving material 110 corresponding to the position where the auxiliary cutting line 510 is formed on the first long film F1. In order to extend the receiving material 110 around the rotation axis 123 extending in a direction orthogonal to the one direction and the other direction in response to movement in one direction, the melted portion of the first long film F1 is The second film contact portion 112 is not pushed in one direction, and the thinned portion is prevented from inadvertently extending.

  And as above-mentioned, in melting the 1st elongate film F1 in the 2nd film contact part 112 of the receiving material 110, and forming a thin part, it is orthogonal to the said one direction with respect to this 1st elongate film F1. Since the tension T is applied in the other direction (conveying direction), a very long and deep groove (cutting auxiliary line) is formed in the first long film F1. That is, since the melted portion of the first long film F1 is pushed away to both sides (both sides in the width direction) of the second film contact portion 112 of the receiving material 110 as described above, the second film contact portion of the receiving material 110 While the portion corresponding to the portion where 112 is present becomes thin, both sides of the thin portion become the raised portions 511 and 511 which are raised, but the second film contact of the receiving material 110 with respect to the first long film F1 By applying the tension T in a direction orthogonal to the width direction of the portion 112, the first long film F1 is placed between two action points that apply the tension T as shown in FIG. Both sides of the planned position where the line 510 is formed are going to be inside (between the action points). Therefore, the melted portions (the raised portions 511 and 511) of the first long film F1 pushed away on both sides of the receiving material 110 (on both sides of the thinned portion) approach each other, and the raised portions 511 that are close to each other. A long and deep groove-like cutting auxiliary line 510 is formed between the grooves 511.

  On the other hand, in the second cutting auxiliary line forming portion 20, as shown in FIG. 8C, the second long film F2 is long in the state where the horn 200 and the receiving material 210 sandwich the second long film F2. Conveyed continuously in the direction. As a result, the melted portion of the second long film F2 is formed in a straight line, and 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. And in this embodiment, also in the 2nd cutting auxiliary line formation part 20, the tension | tensile_strength T acts on the direction orthogonal to the width direction of the 2nd film contact part 212 of the receiving material 210 with respect to the 2nd long film F2. Therefore, as shown in FIG. 8D, the melted portions (the raised portions 501 and 501) of the second long film F2 pushed away on both sides of the receiving material 210 (both sides of the thinned portion) are formed. You will be close to each other. As a result, similar to the first long film F1, in the second long film F2, a long and deep groove-shaped cutting auxiliary line 500 is linearly formed between the raised portions 501 and 501 that are close to each other. The In addition, in the 2nd cutting auxiliary line formation part 20, in order to form the linear cutting auxiliary line 500, unlike the 1st cutting auxiliary line formation part 10, the horn 200 and the receiving material 210 are the 2nd elongate film F2. Continue to be fixed so as to correspond to the center in the width direction.

  Returning to FIG. 6, when the second long film F <b> 2 passes through the second cutting auxiliary line forming part 20 and reaches the food placing part 21, the sheet-like food S is placed on the second long film F <b> 2. The Then, in the film superposition | polymerization part 12, after the 1st elongate film F1 from 1st conveyance path | route R1 and the 2nd long film F2 from 2nd conveyance path | route R2 are overlaid, in the film welding part 13, it overlaps. The first long film F1 and the second long film F2 are welded so as to surround the sheet-like food S.

  Then, the 1st long film F1 and the 2nd long film F2 which were welded and integrated in the film cutting part 14 are cut | disconnected. That is, a region where the first long film F1 and the second long film F2 are welded (region surrounding the sheet-like food S) is cut off as the packaging material 5 to complete the packaging material 5 having the above configuration.

  As described above, according to the cutting auxiliary line forming apparatus 10 (cutting auxiliary line forming method) according to this embodiment, the horn 100 and the receiving material 110 sandwiching the first long film F1 and the first long film F1. Are moved relative to each other in the other direction orthogonal to the tapering one direction of the leading end portion (second film contact portion) 112 of the receiving material 110. As a result of the movement trajectory of the second film contact portion 112 of the receiving material 110 on the long film F1 being curvilinear, the first long film F1 follows the shape and movement trajectory of the second film contact portion 112 of the receiving material 110. The cutting auxiliary line 510 formed by melting correspondingly has a curved shape. Therefore, the cutting auxiliary line forming apparatus 10 and the cutting auxiliary line forming method according to the present embodiment have an excellent effect that the groove-shaped cutting auxiliary line 510 can be formed in a curved shape with respect to the first long film F1. Can be played.

  Moreover, the cutting auxiliary line forming apparatus 10 and the cutting auxiliary line forming method according to the present embodiment include the first long film F1 and the horn 100 and the receiving material 110 sandwiching the first long film F1 in the other direction. Since the horn 100 and the receiving material 110 are reciprocated by a predetermined movement amount in one direction while being relatively moved, the movement of the second film contact portion 112 of the receiving material 110 on the first long film F1. As a result of the locus becoming wavy (curved shape undulating at a substantially constant period), a wavy cut auxiliary line 510 can be formed.

  Further, in the auxiliary cutting line forming apparatus 10 and the auxiliary cutting line forming method according to the present embodiment, the second film contact portion 112 of the receiving material 110 is formed in an arc shape or an annular shape centering on an imaginary line SL extending in one direction. The second film contact portion 112 is formed and the tip of the second film contact portion 112 forms an arcuate or annular ridgeline L centered on the virtual line SL. When the film contact portion 112 is worn (consumed), an appropriate shape of the second film contact portion 112 can be obtained by simply rotating the support material 110 around the imaginary line SL (center) without replacing the entire support material 110. The part (appropriately tapered part) can be made to face the horn 100.

  In addition, the receiving material 110 can be moved in one direction so that the ridgeline L extends in the tangential direction with respect to the trajectory of the second film contact portion 112 of the receiving material 110 corresponding to the scheduled position of the cutting auxiliary line 510. Therefore, the second film contact portion 112 of the receiving material 110 is formed in an arc shape or an annular shape because the second film contact portion 112 of the receiving material 110 is configured to rotate around a rotation shaft 123 extending in a direction orthogonal to the one direction and the other direction. It can be formed without extending the thinned portion (the portion serving as the cutting auxiliary line 510).

  Furthermore, in this embodiment, the horn 100 and the receiving material 110 and the first long film F1 are relatively moved while the tension T is applied to the first long film F1 in another direction orthogonal to the one direction. Since it did in this way, the elongate and deep groove-shaped cutting auxiliary line 510 can be formed between the protruding parts 511 and 511 which approached each other.

  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.

  In the said embodiment, although elongate film F1, F2 was demonstrated to object, it is not limited to this, For example, it is a matter of course also about sheet-like film.

  In the said embodiment, although demonstrated for the packaging material 5 which packages the rice ball R, it is not limited to this, For example, other foods, such as bread and confectionery, daily goods other than foodstuffs, a toy, etc. Of course, the packaging material 5 to be packaged may be used.

  In the above-described embodiment, the front end portion (second film contact portion) 112 and the ridge line L of the receiving material 110 are formed in an annular shape, but the present invention is not limited to this. The film contact portion 112 and the ridge line L may be formed in an arc shape with a virtual line SL extending in one direction as the center of curvature.

  Moreover, in the said embodiment, on the assumption that the front-end | tip part (2nd film contact part) 112 and ridgeline L of the receiving material 110 are formed in an annular | circular shape, the formation of the receiving material 110 corresponding to the formation planned position of the cutting auxiliary line 510 is carried out. The receiving material 110 extends in a direction orthogonal to the one direction and the other direction in correspondence with the movement in one direction so that the ridge line L extends in the tangential direction with respect to the track of the front end portion (second film contact portion) 112. Although it is made to rotate around the rotating shaft 123, it is not limited to this, You may make the receiving material 110 non-rotatable in the state where the ridgeline L extended in the other direction. However, in order to form the cutting assisting line 510 very finely and in good appearance, it is preferable to perform the same as in the above embodiment.

  In the above-described embodiment, the auxiliary cutting line 510 is formed while applying the tension T to the film F1 in the other direction orthogonal to the width direction (one direction) of the tip of the receiving material 110 (applying ultrasonic waves to the horn 100). However, the present invention is not limited to this. For example, the auxiliary cutting line 510 may be formed without applying a tension T to the film. That is, a thin portion may be formed on the film F1 at the second film contact portion 112 of the receiving material 110, and the thin portion may be used as a cutting auxiliary line.

  In the said embodiment, in order to relatively move the 1st long film F1, the horn 100 which sandwiched the 1st long film F1, and the receiving material 110 in the other direction orthogonal to one direction, the 1st long film F1 However, the present invention is not limited to this. For example, by moving the horn 100 and the receiving material 110 in the other direction, the film and the horn 100 and the receiving material 110 sandwiching the film are combined. The horn 100 and the receiving material 110 may be moved in the other direction together with the film, and the horn 100 and the receiving material 110 sandwiching the film and the film may be moved in one direction together with the film. You may make it move relatively in the other direction orthogonal to.

  Further, in the above embodiment, the horn 100 and the receiving material 110 are moved in one direction in order to relatively move the film and the horn 100 and the receiving material 110 sandwiching the film in one direction. The film is not limited, and the film may be moved in one direction, or the horn 100 and the receiving material 110 may be moved in one direction together with the film. However, it is needless to say that when the film to be processed is a long film, it is preferably the same as in the above embodiment.

  In the above embodiment, the wavy cut auxiliary line 510 is formed. However, the present invention is not limited to this, and the curved cut auxiliary line 510 may be formed. That is, you may make it move the horn 100 and the receiving material 110 to one side of one direction, without reciprocating in one direction.

  In the embodiment described above, two wavy cutting auxiliary lines 510 are formed, but the present invention is not limited to this. For example, the number may be one or three or more.

  In the above embodiment, the two wavy cutting auxiliary lines 510 and 510 are formed at intervals. For example, the wavy or curved two or more cutting auxiliary lines 510 and 510 intersect with each other. You may make it form in the made aspect.

  In the above embodiment, the receiving material main body 111 is formed in a disk shape, and extends from the outer periphery of the receiving material main body 111 in the radial direction outwardly, but is not limited thereto, For example, as shown in FIG. 9, a conical second film contact portion 112 may be provided on the receiving material main body 111. In this case, the tip of the second film contact portion 112 comes into linear contact with the film, so that it is not necessary to rotate the receiving material 110 around the rotation shaft 123 as in the above embodiment. .

  In the above embodiment, the cutting auxiliary line 510 is formed in the longitudinal direction of the first long film F1, but the present invention is not limited to this. For example, as shown in FIG. 10, the first long film F1 The auxiliary cutting line 510 extending in the short direction may be formed. And in this case, in order to apply the tension T in the direction in which the auxiliary cutting line 510 is formed (direction perpendicular to one direction) as in the above embodiment, a pair capable of gripping both end portions of the first long film F1. The gripping means 300, 300 may be provided, and the tension T may be applied in the short direction of the first long film F1 by separating the gripping means 300, 300 from each other.

  Although the manufacturing equipment 1 of the above embodiment is shown in FIG. 6, the receiving materials 110 and 210 of the first transport path R1 and the second transport path R2 are arranged above the long films F1 and F2. For example, the horn 100 and the receiving material 110 may be arranged upside down in the first conveying path R1, or the horn 200 and the receiving material 210 may be arranged upside down in the second conveying path R2. You may reversely arrange. That is, the auxiliary cutting line 500 formed on the inner film 50 of the packaging material 5 is formed on either the inner side surface or the outer side surface of the inner film 50, and the auxiliary cutting line 510 of the outer film 51 of the packaging material 5. , 510 may be formed on either the inner side surface or the outer side surface of the outer film 51.

  DESCRIPTION OF SYMBOLS 1 ... Manufacturing equipment, 5 ... Packaging material, 10 ... 1st cutting auxiliary line formation part (cutting auxiliary line formation apparatus), 12, 22 ... Film superposition | polymerization part, 13, 23 ... Film welding part, 14, 24 ... Film cutting part , 20 ... second cutting auxiliary line forming part (cutting auxiliary line forming apparatus), 21 ... food placing part, 50 ... inner film, 51 ... outer film, 100 ... horn, 101 ... horn body, 102 ... first film contact 110, receiving material, 111 ... receiving material body, 112 ... second film contact portion, 113 ... support shaft, 120 ... receiving material support, 121 ... shaft support, 122 ... connecting portion, 123 ... rotating shaft, 130 ... Moving means 131 ... Horn guide means 131a ... Support body 131b ... Rail 132 ... Receiving material guide means 132a ... Support body 132b ... Rail 133 ... Reciprocating drive means 133a, 133b ... Air series 134 ... Rotation drive means (air cylinder), 135 ... Extension part, 200 ... Horn, 201 ... Horn body, 202 ... First film contact part, 210 ... Receiving material, 211 ... Receiving material body, 212 ... Second Film contact portion, 213 ... support shaft, 220 ... receiving material support body, 221 ... shaft support portion, 222 ... connecting portion, 300 ... gripping means, 500,510 ... cutting auxiliary line, 501,501,511,511 ... raised portion, 502, 512 ... notch, CL ... center line, F1 ... first long film (film), F2 ... second long film (film), L ... ridgeline, R1 ... first transport path, R2 ... second transport path , S ... sheet food, SL ... imaginary line, T ... tension

Claims (8)

  A horn to which an ultrasonic wave of a predetermined frequency is applied, and a receiving material for sandwiching a film to be packaged with a wrapping material or a film constituting the packaging material together with the horn, and applying the ultrasonic wave to the horn A cutting auxiliary line forming device that melts and forms a groove-shaped cutting auxiliary line on the film, and the receiving material is formed so that the width of at least one direction of the front end portion sandwiching the film together with the horn becomes narrower toward the front end. The film, the horn sandwiching the film, and the receiving material are moved relative to each other in the other direction orthogonal to the one direction so that the movement locus of the tip of the receiving material on the film is curved. A cutting auxiliary line forming apparatus characterized by being configured to move relative to each other.   The horn and receiving material are moved relative to each other in the other direction so that the movement locus of the tip of the receiving material on the film has a wavy shape that undulates at a constant period. The auxiliary cutting line forming apparatus according to claim 1, wherein the apparatus is configured to reciprocate with a predetermined movement amount in the one direction.   The receiving material is formed in an arc shape or an annular shape with a virtual line whose tip is extending in one direction as a center of curvature, and a tip of the tip has an arc or circular ridge line with the virtual line as the center of curvature. Corresponding to the movement of at least one of the one direction and the other direction so that the ridge line extends in a tangential direction with respect to the trajectory of the front end portion of the receiving material corresponding to the planned formation position of the auxiliary cutting line. The cutting auxiliary line forming apparatus according to claim 1 or 2, wherein the cutting auxiliary line forming apparatus is configured to rotate around a rotation axis extending in a direction orthogonal to the one direction and the other direction.   The cutting auxiliary line forming apparatus according to any one of claims 1 to 3, wherein the horn and the receiving material and the film are relatively moved while applying a tension to the film in the other direction.   A film by applying ultrasonic waves to a 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 forming a groove-shaped cutting auxiliary line on the film by melting the film, wherein the receiving material becomes narrower as the width of at least one direction of the front end portion sandwiching the film together with the horn approaches the front end The film, the horn sandwiching the film, and the receiving material are moved relative to each other in the other direction orthogonal to the one direction so that the movement locus of the receiving material on the film is curved. A method for forming a cutting auxiliary line, wherein the relative moving is also performed in one direction.   The horn and receiving material are moved relative to each other in the other direction so that the moving locus of the tip of the receiving material on the film becomes a wavy line that undulates at a constant period. The cutting auxiliary line forming method according to claim 5, wherein the wire is reciprocated by a predetermined movement amount in the one direction.   A receiving material in which the tip is formed in an arc shape or an annular shape centered on a virtual line extending in one direction and the tip of the tip portion forms an arc shape or an annular ridge line centered on the virtual line, The one direction corresponding to the movement of at least one of the one direction and the other direction so that the ridge line extends in a tangential direction with respect to the trajectory of the front end portion of the receiving material corresponding to the planned cutting auxiliary line formation position. The cutting auxiliary line forming method according to claim 5, wherein the cutting auxiliary line is rotated about a rotation axis extending in a direction orthogonal to the other direction.   The cutting auxiliary line forming method according to any one of claims 5 to 7, wherein the film, the horn, and the receiving material are relatively moved while tension is applied to the film in the other direction.

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