JP2021160728A - Method of manufacturing lidded triangular carton, and lidded triangular carton - Google Patents

Abstract

To provide a lidded triangular carton allowing for taking out a content from a spout and opening and closing the spout.SOLUTION: A lidded triangular carton has: a triangular carton 2 that is in a hollow tetrahedron form having a pair of plate-like joined portions 51, 52 extending in torsional positions; a content that is accommodated within the triangular carton 2; and a lid sheet 3 that is affixed onto a surface of the triangular carton 2 including the plate-like joined portion 51 while covering a content-spout area of the triangular carton 2.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for manufacturing a triangular pack with a lid to which a lid sheet is attached and a take-out port for taking out stored items is generated when the lid sheet is peeled off.

The triangular pack is a tetrahedral package containing stored items, and is generally a regular tetrahedral package.
The triangular pack has a hollow tetrahedral pack body in which the stored items are stored, and a pair of plate-shaped joints extending at twisted positions at both ends of the pack body. In such a triangular pack, a notch is formed in the plate-shaped joint portion for opening stool (Patent Document 1).
In the conventional triangular pack, the stored items can be taken out by cutting the plate-shaped joint from the notch and opening the pack body.

JP-A-2017-165480

However, in the conventional triangular pack, the plate-shaped joint must be cut at the time of opening, and the stored items may pop out at the time of cutting.
In addition, the conventional triangular pack cannot be resealed once the pack body is opened. For example, in the case of food such as snack foods, if the triangular pack is opened and then the food is left uneaten, it becomes unsanitary.

An object of the present invention is to provide a method for manufacturing a triangular pack with a lid and a triangular pack with a lid, which allows the stored items to be taken out by peeling off the lid sheet.

The method for manufacturing a triangular pack with a lid of the present invention is a long strip-shaped sheet original fabric for producing a hollow tetrahedral triangular pack having a storage area, and includes a design corresponding to one triangular pack. A step of preparing a sheet material in which a plurality of planned pack forming portions are arranged so as to alternately interpose a first planned joining portion and a second scheduled joining portion in the longitudinal direction, and adjacent to each other with the first scheduled joining portion in between. The two planned triangular pack forming portions are set as one set, and the storage material taking-out area of each of the one set of planned triangular pack forming portions is covered, and the lid sheet precursor is attached across the first scheduled joining portion. Steps, a step of forming the sheet raw fabric into a tubular shape with its lateral direction as the circumferential direction, a step of storing stored items, and flattening the first joint planned portion of the sheet raw fabric formed into the tubular shape. In the step of forming the first plate-shaped joint portion by joining, the second planned portion of the sheet raw fabric formed in a tubular shape is twisted with respect to the first plate-shaped joint portion. A step of forming a second plate-shaped joint portion by flattening and joining, a step of cutting the first plate-shaped joint portion together with the lid sheet precursor along the lateral direction, the second plate-shaped joint portion. Has a step of cutting along the lateral direction.

A preferred manufacturing method of the present invention is a heat seal in which the first plate-shaped joint is formed by pressing a heating bar from the outside of the first planned joint including the lid sheet precursor.
The preferred manufacturing method of the present invention is to obtain a plurality of triangular packs with lids having substantially the same design and substantially the same attachment position of the lid sheet.

According to another aspect of the present invention, there is provided a triangular pack with a lid.
The triangular pack with a lid of the present invention covers the hollow tetrahedral triangular pack having a plate-shaped joint, the stored items stored inside the triangular pack, and the stored item take-out area of the triangular pack, and the plate. It has a lid sheet attached to the surface of the triangular pack including the shape joint.

According to the manufacturing method of the present invention, a triangular pack with a lid can be efficiently manufactured.
Further, in the triangular pack with a lid of the present invention, the lid sheet can be peeled off and the stored items can be taken out from the take-out port.

A perspective view of a triangular pack with a lid according to the first embodiment as viewed from the first surface side. A perspective view of the triangular pack with the same lid as viewed from the third surface side. Top view of the triangular pack with the same lid. Right side view of the triangular pack with the same lid. FIG. 3 is a cross-sectional view taken along the line VV of FIG. FIG. 3 is a cross-sectional view taken along the line VI-VI of FIG. Perspective view of the triangular pack. The perspective view which shows the state which the lid sheet of the triangular pack with a lid is peeled off and the outlet is opened. A plan view of the original sheet with the design. Top view of the original sheet with the design and cut lines. Top view of the original sheet to which the lid sheet precursor is attached. (A) is a front view showing a process of forming a sheet raw fabric into a cylindrical shape, and (b) is a front view showing a state in which a joint portion is aligned. (A) is a side view showing a step of joining the sheet raw fabrics formed in a cylindrical shape to form a first plate-shaped joint portion, and (b) is a front view of the same. (A) is a side view showing a step of joining the planned joining portions of the sheet raw fabric formed in a cylindrical shape to form a second plate-shaped joint portion, and (b) is a front view of the same. (A) is a front view showing a step of joining the next planned joint portion to form a first plate-shaped joint portion, and (b) is a front view showing a step of joining the next planned joint portion to form a second plate-shaped joint portion. The side view which shows the process of forming. FIG. 15 (b) is an enlarged perspective view of the process. The plan view of the triangular pack with a lid which concerns on 1st example of 2nd Embodiment. The plan view of the triangular pack with a lid which concerns on 2nd example of 2nd Embodiment. (A) is a plan view of the lid sheet precursor according to the first example of the second embodiment, and (b) is a plan view of the lid sheet precursor according to the second example. The perspective view of the triangular pack which concerns on 1st example of 3rd Embodiment. The perspective view of the triangular pack which concerns on 2nd example of 3rd Embodiment. The perspective view of the triangular pack which concerns on 3rd example of 3rd Embodiment. The perspective view of the triangular pack which concerns on 4th example of 3rd Embodiment. The perspective view of the triangular pack with a lid which concerns on 4th Embodiment. Cross-sectional view of the triangular pack with a lid according to the first example of the fifth embodiment (Cross-sectional view of the triangular pack with a lid according to the first example of the fifth embodiment cut at a portion similar to the VV line of FIG. ). (A) is a plan view of the lid sheet precursor according to the first example of the fifth embodiment, and (b) is a cross-sectional view cut by XXVIb-XXVIb of the same (a). A cross-sectional view of a triangular pack with a lid according to a second example of the fifth embodiment (a cross-sectional view cut at a portion similar to the VV line in FIG. 3).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present specification, "first", "second", etc. may be added to the beginning of terms, but the first, etc. are added only to distinguish the terms, and their superiority or inferiority, etc. Has no special meaning. In addition, "abbreviation" means an allowable range in consideration of the technical field to which the present invention belongs or the gist of the present invention.
Also, please note that the dimensions, thickness, scale ratio, etc. in each drawing (especially the cross-sectional view) are different from the actual ones.

[First Embodiment]
<Triangular pack with lid>
In FIGS. 1 to 6, the triangular pack 1 with a lid of the present invention includes a hollow tetrahedral triangular pack 2, a stored object (not shown) housed inside the triangular pack 2, and the triangular pack 2. It has a lid sheet 3 attached to the surface of the triangular pack 2 so as to cover the stored object taking-out area.
The triangular pack 2 includes a hollow tetrahedral pack body 4 having a storage space for storing items inside, and a pair of plate-shaped joints 51 and 52 extending at twisted positions at both ends of the pack body 4. Have. Hereinafter, one of the pair of plate-shaped joints at the twisted position may be referred to as a "first plate-shaped joint 51", and the other may be referred to as a "second plate-shaped joint 52".

<Triangle pack>
The triangular pack 2 is made of a flexible sheet.
The pack body 4 of the triangular pack 2 has a tetrahedral shape in which a triangular first surface 41, a second surface 42, a third surface 43, and a fourth surface 44 are continuously and three-dimensionally formed. The first to fourth surfaces 41 to 44 may have a substantially equilateral triangle shape as shown in the figure, a substantially isosceles triangle shape excluding the equilateral triangle, or a triangle shape other than the isosceles triangle. .. The pack body 4 in which the first to fourth surfaces 41 to 44 have a substantially regular triangular shape as shown in the figure has a substantially regular tetrahedron shape. It should be noted that since the pack body 4 is made of a flexible sheet, the above-mentioned three-dimensional shape of the pack body 4 and the two-dimensional shape of the first to fourth surfaces 41 to 44 do not have a strict meaning. sea bream.

The triangular pack 2 is formed by joining both ends (both ends in the cylindrical axis direction) of the tubular sheet in a state where the stored items are stored inside the tubular sheet. The tubular sheet is obtained by overlapping and joining both end portions of a single-wafer-shaped sheet. The portion 53 in which both end portions of the sheet are joined is referred to as a "joint portion 53". The portions where both ends of the tubular sheet are joined are the first plate-shaped joint portion 51 and the second plate-shaped joint portion 52.
As shown in FIG. 6, the joint portion 53 is formed by superimposing the back surface of the first side end portion 53a of the sheet and the back surface of the second side end portion 53b and joining both sides. Since such a joint structure is a structure in which both hands are put together, it is also called a gassho pasting. The joint portion 53 of such a joint structure is laid down along the surface of the tubular sheet.
Although not particularly shown, in the joint portion 53, the back surface of the second side end portion 53b is overlapped with the surface of the first side end portion 53a (or the back surface of the second side end portion 53b is overlapped with the back surface of the first side end portion 53a. It may be configured by overlapping the surfaces) and joining both sides. Such a joining structure is also called envelope sticking because it is a structure that is often used for forming envelopes.

The first plate-shaped joint portion 51 flattens the ends on the first side in the axial direction of the tubular sheet (the sheet formed into a tubular shape by joining at the joint portion 53), and the back surfaces of the ends are flattened to each other. It is constructed by superimposing and joining. In the second plate-shaped joint portion 52, the end portion of the tubular sheet on the second side in the axial direction (the side opposite to the first side in the axial direction) is flattened, and the back surfaces of the end portions are overlapped and joined. It is composed of things. In addition, in FIG. 5, innumerable dots are added to the joint surface of the second plate-shaped joint portion 52 (the joint surface between the inner surfaces of the end portions).
The method of joining the sheets in the joint portion 53, the first plate-shaped joint portion 51, and the second plate-shaped joint portion 52 is not particularly limited, and examples thereof include heat sealing and adhesion using an adhesive. Since it is easy to form, it is preferable that the sheets in the joint portion 53, the first plate-shaped joint portion 51, and the second plate-shaped joint portion 52 are heat-sealed.
With reference to FIGS. 2 and 4, the widths 53W, 51W, and 52W of the joint portion 53, the first plate-shaped joint portion 51, and the second plate-shaped joint portion 52 are not particularly limited, and generally, respectively. Independently, it is 2 mm to 10 mm.

The first plate-shaped joint 51 extends in a plate shape along the bottoms of the first surface 41 and the third surface 43, and the second plate-shaped joint 52 is the bottom of the second surface 42 and the fourth surface 44. It extends in a plate shape along. The first plate-shaped joint portion 51 and the second plate-shaped joint portion 52 extend in a twisted positional relationship. For example, the extending direction of the first plate-shaped joint portion 51 is approximately 90 degrees with respect to the extending direction of the second plate-shaped joint portion 52. The extending direction of the first plate-shaped joint portion 51 is not limited to approximately 90 degrees with respect to the extending direction of the second plate-shaped joint portion 52, and may be approximately 80 degrees or the like.

The first to fourth surfaces 41 to 44 are designed as necessary. Preferably, the first to fourth surfaces 41 to 44 are each provided with a desired design. The design is provided so that it can be visually recognized from the outside of the triangular pack 2. In this specification, a design is a visual representation of information such as characters, figures, and motifs. The elements of the design include information display (the visually represented information) and the direction of the information display.
In each figure, for convenience, the information display of the design represented on the first surface 41, the second surface 42, the third surface 43, and the fourth surface 44 is displayed as "A", "B", "C", and "D". It is shown by. The orientation of each information display of the design of each surface 41 to 44 is not particularly limited. In the illustrated example, the designs of the first to fourth surfaces 41 to 44 show information displays A, B, C, when the first plate-shaped joint portion 51 is on the lower side of the paper surface, for example, as shown in FIG. D is considered to be the easiest to see.
Designs are usually represented by printing colored inks.

The sheet constituting the triangular pack 2 is not particularly limited, and conventionally known sheets can be used. Examples of the sheet include synthetic resin films, papers, synthetic papers, foamed resin films, and laminates thereof. Further, any appropriate functional layer such as a barrier layer such as a metal vapor deposition layer or a silica vapor deposition layer may be further laminated on the synthetic resin film, paper, synthetic paper, foamed resin film or a laminate thereof. ..
When the joint portions 53 and the plate-shaped joint portions 51 and 52 are formed by thermal sealing as described above, a sheet having a sealant layer in the innermost layer is used, and preferably, the innermost layer has a sealant layer and A sheet having a heat-resistant layer on the outermost layer is used.
Such sheets include a synthetic resin film having a sealant layer on the innermost layer and a heat-resistant resin layer on the outermost layer, paper having a sealant layer on the innermost layer, synthetic paper having a sealant layer on the innermost layer, and an innermost layer. Examples thereof include a foamed resin sheet having a sealant layer and a heat-resistant resin layer on the outermost layer, and a laminate of a synthetic resin film and paper having a sealant layer on the innermost layer.

The materials of the synthetic resin film and the foamed resin sheet are not particularly limited, and are independent of each other, for example, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate; and polyamide resins such as 6 nylon and 66 nylon; Examples thereof include styrene resins such as polystyrene; olefin resins such as polyethylene and polypropylene; polycarbonate resins; and the like.
The material of the sealant layer is not particularly limited, and is typically a low-density polyethylene resin (LDPE), a medium-density polyethylene resin (MDPE), a linear low-density polyethylene resin (LLDPE), or an ethylene-vinyl acetate copolymer. (EVA), ethylene-α olefin copolymer, ethylene-methacrylic acid resin copolymer and other ethylene resins; homopolypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, Polypropylene-based resins such as propylene-α-olefin copolymers; and olefin-based resins such as olefin resins can be mentioned.
Examples of the heat-resistant layer include a heat-resistant resin layer such as a polyester resin or a polyamide resin, and paper.
The thickness of the sheet constituting the triangular pack 2 is not particularly limited and depends on the material thereof, but is, for example, 20 μm to 300 μm.

FIG. 7 is a perspective view showing only the triangular pack 2 (the lid sheet 3 is removed from the triangular pack 1 with a lid).
The pack body 4 of the triangular pack 2 has a stored item take-out area. In the stored item take-out area, when the lid sheet 3 is peeled off from the triangular pack 2, a take-out port is provided so that the stored item can be taken in and out. The outlet is an opening (hole) formed in the surface of the first surface 41 of the triangular pack 2.

In the present embodiment, the cut line 55 is formed in the stored object take-out area. The cut line 55 is a line penetrating in the thickness direction of the sheet constituting the pack body 4. By forming the cut line 55 in the pack body 4, when the lid sheet 3 is peeled off, an outlet is provided in the range surrounded by the cut line 55.
The plan-view shape of the cut line 55 is not particularly limited. As shown in the illustrated example, the cut line 55 is preferably an endd non-linear shape in a plan view, and more preferably an endd non-linear shape having a portion bulging in one direction. By forming such an endless non-linear cut line 55 in a plan view, a relatively large outlet is formed when the lid sheet 3 is peeled off.
For example, the cut line 55 includes both end portions 551 and 551 arranged on the second plate-shaped joint 52 side, and a non-linear portion 552 bulging from both ends toward the first plate-shaped joint 51 side. .. In the illustrated example, the cut line 55 having a substantially U-shape in a plan view is illustrated as the cut line 55 having such a shape.

If necessary, both ends 551 and 551 of the cut wire 55 may be stopped. The stopping process is a process for preventing the sheet (pack body 4) from tearing beyond the end portion 551 of the cut line 55 when the lid sheet 3 is peeled off.
Examples of the stop processing include forming stop lines 553 having portions extending in a direction substantially orthogonal to the non-linear portion 552 at both end portions 551 and 551 of the cut line 55. The cut line 55 may be cut in its entirety in a substantially U-shape in a plan view, or may be partially connected. When a part is connected, the range surrounded by the cut line 55 in the stored item take-out area is inadequate when transporting the original sheet before the lid sheet 3 is attached. It is possible to prevent it from being rolled up.

The cut line 55 may be formed at at least one place, and may be formed at two or more places. The cut line 55 is provided in at least one plane selected from the first to fourth planes 41 to 44. In the illustrated example, one cut line 55 is formed on the first surface 41.
The size of the cut line 55 (outlet) is designed in consideration of the stored items so that the stored items can be taken out.

<Cover sheet>
The lid sheet 3 has a base sheet 31 and an adhesive layer 32 laminated on the back surface of the base sheet 31.
The shape of the base sheet 31 (cover sheet 3) is not particularly limited, and in the illustrated example, it is formed in a substantially rectangular shape (substantially rectangular shape or substantially square shape) in a plan view. The shape of the base sheet 31 may be a shape including an arc such as a substantially circular shape or a substantially elliptical shape, a polygonal shape such as a substantially triangular shape, or the like in a plan view (not shown).
The base sheet 31 is not particularly limited as long as it has flexibility and hermeticity, and examples thereof include synthetic resin films, papers, synthetic papers, and laminates thereof. Further, any suitable functional layer such as a barrier layer such as a metal vapor deposition layer or a silica vapor deposition layer may be further laminated on the synthetic resin film, paper, synthetic paper or a laminate thereof.
The thickness of the base sheet 31 is not particularly limited and depends on the material thereof, but is, for example, 30 μm to 300 μm.
Further, the base sheet 31 may be provided with a desired design, if necessary. The design is provided so that it can be visually recognized from the surface side of the base sheet 31 (cover sheet 3).

The pressure-sensitive adhesive layer 32 is provided on the entire back surface of the base sheet 31.
The pressure-sensitive adhesive layer 32 is formed by applying a pressure-sensitive adhesive to the back surface of the base sheet 31. The pressure-sensitive adhesive has a long-term stickiness to adhere to an adherend at room temperature. From the viewpoint of the material, examples of the pressure-sensitive adhesive include an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, and a urethane-based pressure-sensitive adhesive. From the viewpoint of properties, examples of the pressure-sensitive adhesive include a pressure-sensitive pressure-sensitive adhesive and a heat-sensitive pressure-sensitive adhesive, and a pressure-sensitive pressure-sensitive adhesive is preferably used. A pressure-sensitive pressure-sensitive adhesive has a stickiness that adheres to an adherend at room temperature, and the stickiness lasts for a long period of time. A heat-sensitive adhesive is one in which the adhesiveness that adheres to an adherend is generated by heating, and the adhesiveness lasts for a long time. The pressure-sensitive adhesive layer 32 may have functions such as moisture resistance and / or water vapor barrier property.
The thickness of the pressure-sensitive adhesive layer 32 is not particularly limited, and is, for example, 10 μm to 30 μm.

The lid sheet 3 is attached to the triangular pack 2 via the adhesive layer 32 while covering the stored object take-out area including the cut line 55. At least one lid sheet 3 may be attached to the triangular pack 2, and if necessary, two or more lid sheets 3 may be attached to the triangular pack 2. For example, when the cut lines 55 are formed at two or more places, one lid sheet 3 may be attached so as to cover all of the two or more cut lines 55. Two or more lid sheets 3 may be attached so as to cover each cut line 55. In the illustrated example, one lid sheet 3 is attached so as to cover one notch line 55 formed on the first surface 41 of the pack main body 4.
The lid sheet 3 can be peeled off and reattached to the triangular pack 2 so that the take-out port can be opened and closed by the lid sheet 3. By using the pressure-sensitive adhesive layer 32, a lid sheet 3 that can be peeled off from the triangular pack 2 and can be reattached after the peeling can be formed.
The fact that the lid sheet 3 can be peeled off means that the lid sheet 3 is attached to the triangular pack 2 with an adhesive strength that can be easily peeled off by human power.

The first end portion 3a of the lid sheet 3 is on the side of the first plate-shaped joint portion 51, and the second end portion 3b (the second end portion 3b is sandwiched between the first end portion 3a and the cut line 55). The end portion on the opposite side) is attached so as to be on the second plate-shaped joint portion 52 side.
The first end portion 3a of the lid sheet 3 is overlapped and attached on the first plate-shaped joint portion 51. In particular, the end surface of the first end portion 3a and the end surface of the first plate-shaped joint portion 51 are coincident (exist on the same surface).
The second end portion 3b of the lid sheet 3 is an end portion on the rolling side, and by rolling the lid sheet 3 from the second end portion 3b and peeling it off, the stored object take-out area is opened. The second end portion 3b of the lid sheet 3 does not reach the second plate-shaped joint portion 52, and is located in the in-plane of the pack body 4 (for example, in the in-plane of the first surface 41). By arranging the second end portion 3b in the plane of the pack main body 4, the lid sheet 3 can be easily rolled from the end of the second end portion 3b on the rolling side.

<Stored items>
The stored items stored in the triangular pack 2 are not particularly limited, and examples thereof include sweets, snacks including rice crackers, nuts including beans, seasonings including grated cheese, beverages, cosmetics, and toys. The properties of the stored material are not particularly limited, and may be granular, powdery, jelly-like, or liquid.

<Example of using a triangular pack with a lid>
Items to be stored are stored in the triangular pack 1 with a lid. When taking out the stored items, as shown in FIG. 8, the lid sheet 3 is rolled up from the second end 3b of the lid sheet 3 and peeled off from the triangular pack 2. Since the portion 46 (hereinafter referred to as the partition portion 46) partitioned by the cut line 55 having an end in a plan view is separated from the pack main body 4 by the notch line 55, the partition portion 46 is the lid sheet 3. The take-out port 21 appears in the stored object take-out area following the peeling. After the stored items are appropriately taken out from the take-out port 21, the take-out port 21 can be closed by attaching the lid sheet 3 to the triangular pack 2 again.

Since the cut line 55 is provided with a stop process (stop line 553), as shown in FIG. 8, when the section portion following the lid sheet 3 to be peeled off reaches the stop line 553, the section portion 46 is no longer separated from the triangular pack 2. Therefore, it becomes difficult to peel off the lid sheet 3 any more, and it is possible to prevent the lid sheet 3 from being completely peeled off from the triangular pack 2.
Further, as will be described later, when the seal bar is pressed against the lid sheet precursor (cover sheet 3) during manufacturing, the first end portion 3a of the lid sheet 3 becomes the first plate-shaped joint portion 51 of the triangular pack 2. It will adhere firmly to. Therefore, the first end portion 3a of the lid sheet 3 is hard to be peeled off from the triangular pack 2, and even if the stopper processing is not applied, the lid sheet 3 is prevented from being completely peeled off from the triangular pack 2 at the time of opening. can.

<Manufacturing method of triangular pack with lid>
The triangular pack 1 with a lid of the present invention can be manufactured, for example, by the following method. However, the triangular pack 1 with a lid of the present invention is not limited to the case where it is manufactured by this manufacturing method.
The manufacturing method of the triangular pack 1 with a lid is a step of preparing a long strip-shaped sheet raw fabric for producing a hollow tetrahedral triangular pack (preparation step of the sheet raw fabric), and a lid sheet precursor is attached to the sheet raw fabric. A step of attaching (a lid attaching step), a step of forming the original sheet into a tubular shape with its short side as the circumferential direction (cylindrical forming step), a step of inserting stored items (storage step), and the step of forming the sheet into a tubular shape. The step of forming the first plate-shaped joint portion by joining the sheet raw fabrics while flattening them (first joining step), and the step of joining the sheets so as to be in a twisted position with respect to the first plate-shaped joint portion. A step of forming a two-plate-shaped joint (second joining step), a step of cutting the first plate-shaped joint together with the lid sheet precursor along the lateral direction (first cutting step), the second plate-shaped joint. It has a step of cutting the joint portion along the lateral direction (second cutting step).

The order of each step is not particularly limited, and each step may be carried out in an appropriate order.
For example, either one of the sheet raw material preparation step and the lid sticking step may be performed first, or may be performed simultaneously. Usually, it is preferable that the lid attaching step is performed after the preparation step of the sheet raw material.
Further, either one of the lid attaching step and the tubular forming step may be performed first, or may be performed simultaneously. Usually, the tubular forming step is preferably performed after the lid attaching step.
Further, the tubular forming step and the storing step are usually performed first in the tubular forming step, but may be performed simultaneously. That is, by forming the sheet raw material into a cylindrical shape so as to wrap the stored items, the stored items can be stored in the cylinder at the same time as forming the sheet raw material into a cylindrical shape.
The first cutting step and the second cutting step are usually performed first, but may be performed simultaneously.
Further, either of the storage step and the first joining step (or the second joining step) may be performed first, or may be performed simultaneously. For example, in the case of storing the stored items while dropping them downward, it is preferable that the stored items are stored after the first joining step (or the second joining step) is performed.

The manufacturing method may include steps other than the above steps. Further, each of the above steps may be carried out in a series on one production line, or one or more steps selected from each of the above steps may be carried out on one line, and the remaining steps may be carried out on the other one. It may be done on one or more lines. In addition, one performer may perform all of the steps, or one performer may perform one or more steps selected from the steps, and the remaining steps may be performed by another. May be done by a person.

<< Preparation process of sheet material >>
FIG. 9 is a plan view of the original sheet 6 provided with the design as viewed from the front surface side.
The original sheet 6 is a long strip-shaped sheet that is the basis of the sheet for producing the triangular pack 2. Conceptually, the sheet original fabric 6 can be said to be one in which each sheet forming each triangular pack 2 is continuously connected in the longitudinal direction.
The sheet original fabric 6 has a long strip shape. The long strip shape refers to a substantially rectangular shape in a plan view in which the length in the longitudinal direction is sufficiently longer than that in the lateral direction. The length of the long strip is 5 m or more in the longitudinal direction, and preferably 10 m or more in the longitudinal direction. The lateral direction is a direction orthogonal to the longitudinal direction.

On the sheet original fabric 6, triangular pack forming planned portions including a design corresponding to one triangular pack 2 are arranged side by side in the longitudinal direction thereof. The portion where the triangular pack is to be formed is a portion of the original sheet 6 which will eventually become the pack body 4 of the triangular pack 2.
The information displays A, B, C, and D of the design corresponding to the one triangular pack 2 are the same as those shown on the first to fourth surfaces 41 to 44 described above. Hereinafter, the design corresponding to one triangular pack 2 is referred to as "unit design".

A plurality of unit designs are arranged side by side in the longitudinal direction of the sheet original fabric 6 via the planned joining portions 71 and 72. Therefore, the unit design (design equivalent to one triangular pack) and the planned joint portions 71 and 72 are alternately arranged in the longitudinal direction of the sheet original fabric 6.
One planned joint portion 71 is a portion that becomes two first plate-shaped joint portions 51 through the first joint step, and the other planned joint portion 72 is a portion that undergoes the second joint step and becomes two second plates. It is a portion to be a plate-shaped joint portion 52. Hereinafter, the planned joint portion 71 that will be the two first plate-shaped joint portions 51 will be referred to as the "first planned joint portion 71", and the planned joint portion 72 that will be the two second plate-shaped joint portions 52 will be referred to as the "second planned joint portion 72". Part 72 ".
The first planned joining portion 71 and the second scheduled joining portion 72 are alternately arranged in the longitudinal direction. Therefore, a plurality of the planned triangular pack forming portions are arranged so as to alternately interpose the first planned joining portion and the second scheduled joining portion in the longitudinal direction.

The width 71W of the first planned joint portion 71 is about twice the width 51W of the first plate-shaped joint portion 51, and the width 72W of the second planned joint portion 72 is the width 52W of the second plate-shaped joint portion 52. It is about twice.
The first planned joining portion 71 and the second scheduled joining portion 72 are alternately arranged in the longitudinal direction of the sheet original fabric 6 with a predetermined interval (interval corresponding to one pack body).
Further, both side ends of the sheet original fabric 6 in the lateral direction are portions 73 where the joint portion 53 is to be formed.
In FIG. 9, in order to make it easy to understand, a thin diagonal line from the upper right to the lower left of the paper surface is added to the planned joint portion (first planned joint portion 71 and the second planned joint portion 72), and the paper surface is formed on the planned joint portion 73. A thin diagonal line is added from the upper left to the lower right (the shaded area is the intersection of the planned joint portions 71 and 72 and the planned joint formation portion 73). Further, the regions to be the first to fourth surfaces 41 to 44 of one pack main body are indicated by broken lines, and the information displays A, B, C, and D of the design applied to each surface are shown (FIGS. 10 and 10 and). The same applies to FIG. 11).

When two adjacent triangular pack forming planned portions are set as one set with the first scheduled joining portion 71 as a reference, the one set of triangular packs is used in the sheet original fabric 6. The planned formation portions (the two planned formation portions of the triangular pack and the first planned joint portion 71 between them) are lined up in the longitudinal direction with a predetermined interval (corresponding to the width of the second planned joint portion 72).
On the other hand, when the second planned portion 72 is used as a reference, the two planned portions for forming a triangular pack adjacent to the planned second joint 72 are set as one set, and the set of planned portions for forming a triangular pack (two triangular packs). The planned formation portion and the second planned joint portion 72) are arranged in the longitudinal direction with a predetermined interval (corresponding to the width of the first planned joint portion 71).

The orientation of the unit design is not particularly limited, but since the triangular pack 1 with a lid having substantially the same information display can be manufactured, the orientation of the information display of the odd-numbered unit design n1 among the plurality of unit designs arranged in the longitudinal direction is The directions of the information display of the even-numbered unit design n2 are all substantially the same, and the directions of the information display of the odd-numbered unit design n1 and the information display of the even-numbered unit design n2 are the joint planned portion 71. , 72 is sandwiched between them and is 180 degrees. The substantially same orientation means that the orientations are substantially the same, and includes not only the case where the orientations are completely the same, but also the case where a portion having a different orientation is found when carefully staring at each information display.
Further, since the triangular pack 1 with a lid having substantially the same design can be continuously manufactured, it is preferable that the information displays A, B, C, and D are represented by the combination as shown in FIG. The fact that the design is substantially the same means that the content of the information display is almost the same and the direction of the information display is almost the same. In addition to the case where the content and direction of the information display are completely the same, individual information It also includes the case where a part with a different content and / or orientation is found when carefully staring at the display.

With reference to FIG. 9, the surfaces 41 to 44 of the plurality of triangular pack formation planned portions of the sheet original fabric 6 are arranged in the longitudinal direction. Of these, the first surface 41 and the third surface 43 are continuously arranged in the longitudinal direction with the planned joining portion (first scheduled joining portion 71 or second scheduled joining portion 72) interposed therebetween. On the other hand, the second surface 42 and the fourth surface 44 are alternately arranged with the planned joining portion (first scheduled joining portion 71 or second scheduled joining portion 72) interposed therebetween.

The design is represented by printing. If the sheet original fabric 6 is opaque, the design is printed on the surface of the sheet original fabric 6. When the sheet original fabric 6 is transparent, the design is printed on the front surface and / and the back surface of the sheet original fabric 6.

As shown in FIG. 10, a cut line 55 is formed on the sheet original fabric 6 on which the design is represented. The cut line 55 is provided corresponding to one triangular pack formation planned portion. In the case of manufacturing the triangular pack 1 with a lid in which the cut line 55 is formed on the first surface 41 as described above, a predetermined portion of the original sheet 6 corresponding to the first surface 41 of the planned portion for forming the triangular pack. The notch line 55 is formed in. With respect to one set of planned triangular pack formation portions, cut lines 55 are formed in the two planned triangular pack formation portions, respectively, but each cut line 55 formed in one set of planned triangular pack formation portions is scheduled to be first joined. It is preferably formed at a position symmetrical with respect to the portion 71.
The cut line 55 is usually formed on the sheet original fabric 6 after the design is printed.

<< Closure pasting process >>
The lid sheet precursor 39 is attached to the surface of the sheet original fabric 6 on which the design and the cut line 55 (means for generating the take-out port) are formed.
The lid sheet precursor 39 used in the manufacturing process is conceptually a combination of a plurality of lid sheets 3 of the triangular pack 1 with a lid. In the present embodiment, the lid sheet precursor 39 is a combination of two lid sheets 3. Specifically, in the lid sheet precursor 39 of the present embodiment, conceptually, the two lid sheets 3 described in the above <triangular pack with lid> are connected to each other at the end of the first end portion 3a. Similar to the one. Therefore, the description of the layer structure of the lid sheet precursor 39 and the like will be omitted.

As shown in FIG. 11, the lid sheet precursor 39 covers each cut line 55 of one set of planned triangular pack forming portions and constitutes two planned triangular pack forming portions (the one set of planned triangular pack forming portions). It is attached so as to straddle the first planned joining portion 71 between the two planned forming portions of the triangular pack). For example, when two planned portions for forming a triangular pack adjacent to the first planned portion 71 are set as one set, the lid sheet precursor 39 covers each of the cut lines 55 of the set of planned portions for forming a triangular pack. It is pasted over the first planned joint portion 71.
Since the pressure-sensitive adhesive layer 32 is provided on the back surface of the lid sheet precursor 39, the lid sheet precursor 39 is passed through the pressure-sensitive adhesive layer 32 to form a set of triangular packs of the sheet original fabric 6. It can be overlapped and attached to the first planned joint portion 71 while covering each stored object take-out area.

<< Cylindrical forming process >>
In the middle of feeding the sheet raw fabric 6 in the longitudinal direction, the sheet original fabric 6 is formed into a cylindrical shape with the back surface side of the sheet original fabric 6 inside and the lateral direction of the sheet original fabric 6 as the circumferential direction (see FIG. 12A).
For example, as shown in FIG. 12A, the sheet original fabric 6 to which the lid sheet precursor 39 is attached is formed in a cylindrical shape with the lateral direction as the circumferential direction, and both end portions (joint) in the lateral direction thereof. The back surfaces of the parts to be formed 73, 73) are overlapped with each other. After that, the back surfaces of the both end portions are joined to each other by pressing the pair of seal bars 81, 81 from the front surface side of the overlapped both end portions. In this way, the sheet raw fabric formed in a tubular shape is obtained by the joint portion 53 extending in the longitudinal direction (hereinafter, the sheet raw fabric 6 formed in a tubular shape is referred to as "cylindrical sheet raw fabric 61". A thermal seal is preferable because the joints of both end portions (parts 73 and 73 to be formed of the joint portion) can be easily formed. In the case of the thermal seal, at least one of the pair of seal bars 81 and 81 is heated. A heating bar is used.

The reference numeral (a) in the figure (a) indicates a guide plate 88 (represented by a alternate long and short dash line) that guides the sheet original fabric 6 when the sheet original fabric 6 is formed into a tubular shape. , Indicates the supply pipe (represented by the alternate long and short dash line) that supplies the stored items.
As shown in FIG. 3B, the joint portion 53 extending in the longitudinal direction is tilted down and along the surface of the tubular sheet raw fabric 61 to produce a substantially cylindrical tubular sheet original fabric 61.

When the lid sticking step is performed after the tubular forming step, the sheet raw fabric 6 (to which the lid sheet precursor 39 is not stuck) is formed into a tubular shape in the same manner to form a tubular sheet raw material. After obtaining the roll 61, the tubular sheet original roll 61 may be folded flat and the lid sheet precursor 39 may be attached at a predetermined position.

<< Second joining process >>
The second plate-shaped joint portion 52 is formed by joining the tubular sheet original fabric 61 while flattening it.
FIG. 13 (a) is a side view showing a state in which the second planned joint portion 72 of the cylindrical sheet original fabric 61 is joined by using the seal bars 82 and 82, and FIG. 13 (b) is a front view thereof. It is a figure. In FIG. 13, the regions to be the first to fourth surfaces 41 to 44 of one pack main body are shown by broken lines, and the planned joining portions (first scheduled joining portion 71 and second scheduled joining portion 72) are connected to the planned joining portion 71 from the upper right to the lower left of the paper surface. A thin diagonal line is added to represent the design information displays A, B, C, and D applied to each surface (the same applies to FIGS. 14 and 15).

With reference to FIG. 13, the pair of seal bars 82 and 82 are pressed from the surface side of the tubular sheet original fabric 61 while flattening the second joint planned portion 72. The alternate long and short dash line and the white arrow in FIG. 6A represent the movement of the seal bars 82 and 82. By joining the second planned joint portion 72 in this way, the second plate-shaped joint portion 52 is formed on the cylindrical sheet original fabric 61. A heat seal is preferable because the joint of the second plate-shaped joint portion 52 can be easily formed. In the case of heat sealing, a heated heating bar is used for at least one of the pair of seal bars 82, 82.
In the illustrated example, the case where the planned joining portion at the tip end portion of the tubular sheet raw fabric 61 (downstream side of the sheet original fabric 6 conveyed in the longitudinal direction) is first joined is illustrated. In the illustrated example, the tip of the tubular sheet raw fabric 61 is cut according to the dimensions, but in the actual industrial manufacturing process, the tip of the tubular sheet raw fabric 61 is extra. Note that the seats are connected. The extra sheet is cut and discarded.

<< Storage process >>
The tubular sheet original fabric 61 on which the second plate-shaped joint portion 52 is formed at the tip portion is a long tubular body having a closed tip portion.
A predetermined amount of stored matter is put inside the tubular sheet original fabric 61 through the supply pipe 89. Since the tip portion is closed, the stored items do not leak to the outside of the cylindrical sheet original fabric 61.

<< First joining process >>
The first plate-shaped joint portion 51 is formed by joining the first joint planned portion 71 of the cylindrical sheet original fabric 61 containing the stored items.
FIG. 14 (a) is a side view showing a state in which the first planned joint portion 71 of the cylindrical sheet original fabric 61 is joined by using the seal bars 83 and 83, and FIG. 14 (b) is a front view thereof. It is a figure.
With reference to FIG. 14, the pair of seal bars 83, 83 are pressed from the surface side of the first planned joint portion 71, which is located immediately upstream of the second plate-shaped joint 52 joined earlier, while being flattened. As described above, the first planned joint portion 71 is a planned joint portion between two planned triangular pack formation portions constituting one set of planned triangular pack formation portions. The alternate long and short dash line and the white arrow in FIG. 6A represent the movement of the seal bar 83. By joining the first planned joint portions 71 in this way, the first plate-shaped joint portion 51 can be formed between the two triangular pack formation planned portions of the cylindrical sheet original fabric 61. However, the first plate-shaped joint portion 51 (first plate-shaped joint portion 51 obtained by joining the first planned joint portion 71) at this stage is the first plate-shaped joint portion 51 of the two triangular packs 2. Corresponds to.

The seal bars 83 and 83 are pressed from the outside of the first planned joining portion 71 including the surface of the lid sheet precursor 39. By pressing the seal bars 83, 83 including the lid sheet precursor 39, the portion of the lid sheet precursor 39 pressed by the seal bars 83, 83 is strongly adhered. A heat seal is preferable because the joining of the first scheduled joining portion 71 can be easily formed. In the case of heat sealing, a heated heating bar is used for at least one of the pair of seal bars 83, 83. By pressing the heating bar against the first planned joint portion 71 including the lid sheet precursor 39, the first plate-shaped joint portion 51 to which the first planned joint portion 71 is joined can be formed.
Since the first planned joint portion 71 including the lid sheet precursor 39 has a thickness difference corresponding to the thickness of the lid sheet precursor 39, the seal having a stepped portion is taken into consideration. Bars 83, 83 may be used. Alternatively, the seal bars 83, 83 may be used so that the pressing surface has flexibility and can be deformed according to the thickness difference so as to follow the thickness difference.

Further, the first planned joint portion 71 is joined so as to be twisted with respect to the second plate-shaped joint portion 52 (in other words, the second planned joint portion 72 is joined in the first plate shape. It is joined so that it is in a twisted position with respect to the joint portion 51). For example, the first planned joint portion 71 is flattened so as to be about 90 degrees with respect to the second plate-shaped joint portion 52, and the seal bars 83 and 83 are pressed against the second plate-shaped joint portion 52. The first plate-shaped joint 51 extending at approximately 90 degrees can be formed.
In this way, with a first lid, the stored items are stored inside and sealed by the first plate-shaped joint portion 51 and the second plate-shaped joint portion 52 on the tip end side of the cylindrical sheet original fabric 61. The triangular pack 11 can be formed.

In the above, the case where the second joining step, the storage step, and the first joining step are performed in this order is illustrated, but the same applies to the case where the first joining step, the storage step, and the second joining step are performed in this order. That is, in the above, the case where the first planned joining portion to be joined at the tip of the cylindrical sheet original fabric 61 is the second scheduled joining portion 72 is illustrated, and the first scheduled joining portion is the first scheduled joining portion. It may be part 71.

<< Repeat process >>
By repeating the first joining step, the storing step, and the second joining step in this order, a continuous body in which a plurality of triangular packs 1 with lids are connected can be formed.
Briefly, after forming the first plate-shaped joint 51 as shown in FIG. 14, the stored material is put inside the tubular sheet original fabric 61 through the supply pipe 89, and as shown in FIG. 15 (a). , The second planned joint portion 72 located immediately upstream of the first plate-shaped joint portion 51 is flattened and joined by the seal bars 82 and 82, and the twisted position with respect to the first plate-shaped joint portion 51. The second plate-shaped joint portion 52 is formed. However, the second plate-shaped joint 52 (the second plate-shaped joint 52 obtained by joining the second planned second joint 72) at this stage is the second plate-shaped joint 52 of the two triangular packs 2. Corresponds to. In this way, the second triangular pack 12 with a lid connected to the first triangular pack 11 with a lid can be formed.

Further, after forming the second plate-shaped joint 52 as shown in FIG. 6A, the stored material is put inside the tubular sheet original fabric 61 through the supply pipe 89, and as shown in FIG. , The first planned joint portion 71 located immediately upstream of the second plate-shaped joint portion 52 is flattened and joined by the seal bars 83 and 83, and the twisted position with respect to the second plate-shaped joint portion 52. The first plate-shaped joint portion 51 is formed. In this way, the third triangular pack 13 with a lid connected to the second triangular pack 12 with a lid can be formed.
Note that FIG. 16 is an enlarged perspective view of the state of FIG. 15B for easier understanding.

<< Cutting process >>
As described above, the continuous body in which a plurality of triangular packs 1 with lids are connected is cut in the lateral direction at the first plate-shaped joint portion 51 and the second plate-shaped joint portion 52, thereby forming individual lidded triangles. Pack 1 is obtained. In FIG. 16, the cut portion is represented by a small broken line. In FIG. 16, the cut portion is represented by a straight line, but the cut shape is not limited to the straight line, and may be, for example, a wavy shape or a zigzag shape.
Here, it has been described that the continuous body in which the triangular packs 1 with lids are connected is produced and then cut in sequence. For example, after forming the first plate-shaped joint portion 51 in the first joining step, or It may be cut at the same time as the formation, or may be cut after the second plate-shaped joint portion 52 is formed in the second joining step or at the same time as the formation.

According to the manufacturing method as described above, the design of the triangular pack 2 is substantially the same (the information displays A, B, C, and D are substantially the same, and the directions of the information displays A, B, C, and D are substantially the same). Moreover, it is possible to manufacture a plurality of triangular packs 1 with lids in which the attachment positions of the lid sheets 3 are substantially the same. That is, all the triangular packs 1 with lids obtained by the above manufacturing method have substantially the same design of the triangular pack 2 and substantially the same position of the lid sheet 3.
Further, since the lid sheet precursor 39 is attached to one set of planned triangular pack formation portions (because the lid sheet precursor 39 is attached across the two planned triangular pack formation portions), the lid sheet 3 is attached. Work can be simplified.

Hereinafter, a second embodiment of the present invention will be described. In the description thereof, configurations and effects different from those of the above-described embodiments will be mainly described, and terms or symbols are used as they are for similar configurations. The description of the configuration and the effect may be omitted (the same applies to the third and subsequent embodiments).

[Second Embodiment]
In the first embodiment, the entire back surface of the second end portion 3b, which is the roll-up side of the lid sheet 3, is attached to the surface of the triangular pack 2 via the adhesive layer 32. For example, it is shown in FIG. As described above, a part 3b-1 of the second end portion 3b may not be attached to the surface of the triangular pack 2. In FIG. 17, innumerable dots are added to the portion 3b-1 of the lid sheet 3 that is not attached to the triangular pack 2. By providing the non-adhesive portion on the rolling side in this way, the lid sheet 3 can be easily rolled. The entire second end portion 3b may not be attached to the surface of the triangular pack 2 (not shown).
As a method of not sticking a part of the lid sheet 3, a masking agent (such as a release agent) that hides the adhesive force of the pressure-sensitive adhesive layer 32 is applied to the part, or the pressure-sensitive adhesive layer 32 is applied to the part. There is a method such as not providing.

Further, as shown in FIG. 18, a knob portion 3c extending outward may be formed at the second end portion 3b of the lid sheet 3. By extending the pinching portion 3c, the pinching portion 3c can be pinched and the lid sheet 3 can be easily rolled up. The back surface of the knob portion 3c may be detachably attached to the surface of the triangular pack 2 via the adhesive layer, but it is preferably not attached to the surface of the triangular pack 2.

FIG. 19A is a plan view of the lid sheet precursor 39 used in manufacturing the triangular pack 1 with a lid shown in FIG. 17, and FIG. 19B is a triangular pack 1 with a lid shown in FIG. It is a top view of the lid sheet precursor 39 used in manufacturing.

[Third Embodiment]
In the first embodiment, the cut line 55 formed in the triangular pack 2 is stopped, but for example, as shown in FIG. 20, even if the cut line 55 is not stopped. good. The notch wire 55 that has not been stopped has, for example, both end portions 551 and 551 and a non-linear portion 552 that bulges from both end portions 551 and 551 to the second plate-like joint portion 52 side. Since the cut line 55 is not stopped, when the lid sheet 3 is peeled off, the portion (partitioned portion 46) partitioned by the cut line 55 follows, and both ends 551 of the cut line 55 There is a risk of breakage in the plane of the triangular pack 2 from 551. However, since both end portions 551 and 551 of the cut line 55 are arranged on the side of the first plate-shaped joint portion 51, when the break reaches the first plate-shaped joint portion 51, the breakage further progresses. This eliminates the problem and prevents the lid sheet 3 from completely peeling off from the triangular pack 2 when opened.

Further, in the first embodiment, the case where the cut line 55 is formed in the stored object take-out area of the triangular pack 2 is illustrated, but instead of or in combination with the cut line 55, for example, as shown in FIG. In addition, an opening 56 may be formed in the stored object take-out area of the triangular pack 2.
Further, as shown in FIG. 22, a plurality of openings 57, 57 may be densely formed in a relatively narrow range in the stored object take-out area. In FIG. 22, a small opening 57 is adopted. The triangular pack 2 having such a dense small opening 57 (outlet opening) is suitable for storing powder such as grated cheese as a storage object. In this case, it is preferable that the plurality of dense openings 57 are closed by one lid sheet 3.
Further, instead of or in combination with the cut line 55, for example, as shown in FIG. 23, a perforation line 58 may be formed in the stored item take-out area. The perforation line 58 is formed in a non-linear shape with an end in a plan view having a portion bulging in one direction like the cut line 55, or is formed in an annular shape in a plan view. When the lid sheet 3 is peeled off, it breaks at the perforation line 58 and an outlet is formed in the range surrounded by the perforation line 58.
In addition, instead of or in combination with the cut line 55, for example, a half-cut line may be formed as a means for creating an take-out port in the stored item take-out area (not shown).

[Fourth Embodiment]
In the first embodiment, the fixing process is applied to the triangular pack 2, but the closing process may be applied to the lid sheet 3.
For example, as shown in FIG. 24, a cut line 59 is formed in the plane of the lid sheet 3. The cut line 59 is, for example, 591,591 at both ends arranged on the side of the first plate-shaped joint 51, and a non-linear portion 592 bulging from both ends 591, 591 to the second plate-shaped joint 52 side. And a stop wire portion 593, 593 having a portion extending in a direction substantially orthogonal to the non-linear portion 592 from both end portions 591 and 591.
When the lid sheet 3 on which the cut line 59 is formed is peeled off from the second end portion 3b side and reaches the stop wire portion 593, it becomes difficult to peel off the lid sheet 3 any more. The lid sheet 3 that has been subjected to the stop processing is particularly preferably applied to the triangular pack 2 that has adopted the opening as the take-out port described in the second embodiment.

[Fifth Embodiment]
In the first embodiment, the pressure-sensitive adhesive layer 32 is provided on the entire back surface of the lid sheet 3, and the entire lid sheet 3 is detachably attached to the triangular pack 2 via the pressure-sensitive adhesive layer 32. However, the first end portion 3a of the lid sheet 3 may be strongly adhered to the triangular pack 2. The strong adhesion means a state in which the adhesive is so strong that it is difficult to peel it off.
For example, as shown in FIG. 25, the base sheet 31, the adhesive layer 32 laminated except for the first end portion 3a of the back surface of the base sheet 31, and the first end of the back surface of the base sheet 31. A lid sheet 3 having a strong adhesive layer 33 laminated on the portion 3a may be used. The first end portion 3a of the lid sheet 3 is strongly adhered to the first plate-shaped joint portion 51 of the triangular pack 2 via the strong adhesive layer 33, and the pressure-sensitive adhesive layer 32 is provided except for the first end portion 3a. It is attached to the storage area of the triangular pack 2 so that it can be peeled off and reattached. By using the lid sheet 3 in which the first end portion 3a is strongly adhered to the triangular pack 2 in this way, it is possible to prevent the first end portion 3a from being completely peeled off from the triangular pack 2 at the time of opening.

The material for forming the strong adhesive layer 33 is not particularly limited as long as it can strongly adhere to the triangular pack 2, but a material that exhibits strong adhesion by heating is preferable. Examples of the strong adhesive layer 33 that develops strong adhesion by heating include a thermosetting resin layer and a heat-sealing resin layer.
26 (a) is a plan view of the lid sheet precursor 39 used in manufacturing the triangular pack 1 with a lid shown in FIG. 25, and FIG. 26 (b) is a cross-sectional view thereof. The lid sheet precursor 39 is provided with a strong adhesive layer 33 in a range corresponding to the first planned joining portion 71, and is provided with an adhesive layer 32 in addition to the strong adhesive layer 33.
According to the above <Manufacturing method of a triangular pack with a lid>, the lid sheet precursor 39 shown in FIG. >> According to >>, the cover sheet precursor is pressed against the first plate-shaped joint portion 51 formed by pressing the seal bars 83, 83 from the outside of the first planned joint portion 71 including the surface of the lid sheet precursor 39. 39 can be strongly adhered via the strong adhesive layer 33.

As the base sheet 31 of the lid sheet 3, a sheet capable of heat-sealing may be used on the surface of the triangular pack 2. As shown in FIG. 27, the lid sheet 3 having such a base sheet 31 has its first end portion 3a directly strong against the surface of the triangular pack 2 (for example, the surface of the first plate-shaped joint portion 51). Be glued.

[Sixth Embodiment]
In the <method for manufacturing a triangular pack with a lid> of the first embodiment, the lid sheet precursor 39 is attached to the sheet original fabric 6 on which the cut line 55 is formed, but the sheet (the cut line 55 is not formed) is attached. The cut line 55 may be formed after the lid sheet precursor 39 is attached to the stored material take-out area of the original fabric 6.

[Other Embodiments]
Two or more configurations selected from the various embodiments may be combined as appropriate, or one or more configurations selected from the various embodiments may be replaced with other embodiments. good. For example, a part of the configurations shown in the second embodiment may be replaced with a part of the configurations of the third embodiment.

1 Triangular pack with lid 2 Triangular pack 3 Lid sheet 39 Lid sheet precursor 4 Pack body 41, 42, 43, 44 1st surface, 2nd surface, 3rd surface, 4th surface 51 1st plate-shaped joint 52nd 2 Plate-shaped joint 55 Cut line (outlet)
56, 57 Opening (outlet)
58 Sewing machine line of sight (outlet)
6 Sheet original fabric 61 Sheet original fabric formed in a cylindrical shape 71 First planned joint part 72 Second planned joint part

Claims (4)

A long strip-shaped sheet original fabric for producing a hollow tetrahedral triangular pack having a storage area, and a plurality of planned triangular pack forming portions including a design corresponding to one triangular pack are formed in the longitudinal direction. The process of preparing the sheet material, which is arranged so that the 1st planned joining part and the 2nd scheduled joining part are alternately interposed.
Two triangular packs scheduled to be formed that are adjacent to each other with the first planned joint portion formed are set as one set, and each set of the planned triangular pack formation portions covers the storage area to be taken out and straddles the first planned joint portion. The process of pasting the lid sheet precursor,
A step of forming the original sheet into a cylindrical shape with the lateral direction as the circumferential direction.
The process of storing stored items,
A step of forming a first plate-shaped joint portion by flattening and joining the first planned joint portion of the sheet raw fabric formed in a cylindrical shape.
The second plate-shaped joint is formed by flattening the second planned portion of the sheet formed into a tubular shape so as to be in a twisted position with respect to the first plate-shaped joint. The process of forming,
A step of cutting the first plate-shaped joint together with the lid sheet precursor along the lateral direction.
A step of cutting the second plate-shaped joint along the lateral direction.
A method for manufacturing a triangular pack with a lid. The triangular pack with a lid according to claim 1, wherein the formation of the first plate-shaped joint portion is a heat seal by pressing a heating bar from the outside of the first planned joint portion including the lid sheet precursor. Manufacturing method. The method for manufacturing a triangular pack with a lid according to claim 1 or 2, wherein a plurality of triangular packs with a lid having substantially the same design and substantially the same attachment position of the lid sheet can be obtained. A hollow tetrahedral triangular pack with a plate-like joint,
The items stored inside the triangular pack and
A triangular pack with a lid, comprising a lid sheet that covers the storage area of the triangular pack and is attached to the surface of the triangular pack including the plate-shaped joint portion.

Images