JP2020152428A - Assembly method for packaging container - Google Patents

Abstract

To provide an assembly method for a packaging container which can be reused by returning again into a box-shaped state even after being crushed into a flat state.SOLUTION: An assembly method for a packaging container comprises: a steps of providing the packaging container which includes: a first part and a second part that are flat-shaped, and each of that first and second parts has: a convex polygonal face; isosceles trapezoidal faces each extending from each side of the convex polygonal face and having one of two parallel sides defined by said each side; and plural foldable faces; and a peripheral edge part over the whole circumference of an outer edge; and that are connected to each other around a whole circumference of the peripheral edge part, and arranging plural pressing jigs so as to surround the peripheral edge part; and a step of moving the plural pressing jigs along the flat plate-shaped face of the packaging container while bringing them into contact with the peripheral edge part to form a gap between the first part and the second part, and folding the foldable faces to form foldable pieces, thereby forming the packaging container into a box shape.SELECTED DRAWING: Figure 6

Description

The present invention relates to a method for assembling a packaging container.

A packaging container formed by bending a sheet material into a box shape and overlapping and sealing the ends is known.

For example, in Patent Document 1, a peelable pull tab is provided on a side seal of a container body using a sheet material based on paper, and the pull tab is peeled off via a peeling layer made of an easily peelable tape-like film. A wrapping container (liquid wrapping paper container) that is provided as possible is disclosed. This packaging container can be disassembled by pulling the pull tab to peel off the side seal portion or by pulling the pull tab provided on the side plate to cut through the side plate and using it as a trigger.

Japanese Unexamined Patent Publication No. 9-290822

Since the packaging container of Patent Document 1 is easy to disassemble at the time of disposal, it is useful for reducing the volume of waste, but the packaging container once disassembled cannot be assembled and reused. For this reason, there was room for study on a packaging container that can be reused by returning it to a box-shaped state even after it has been crushed to a flat state and an assembly method thereof.

The present invention has been made in view of such a problem, and provides a method for assembling a packaging container that can be reused by returning it to a box-shaped state even after being crushed to a flat state once. With the goal.

One aspect of the present invention for solving the above problems is a method of assembling a packaging container, which comprises a first portion and a second portion of a flat plate shape overlapping with each other, and the first portion and the second portion. Are adjacent to a convex polygonal surface of a convex polygon and an isosceles trapezoidal surface of an isosceles trapezoid that extends from each side of the convex polygonal surface and has each side as one of two parallel sides. A packaging container having a plurality of folded surfaces provided between each isosceles trapezoidal surface and a peripheral edge portion covering the entire circumference of the outer edge and connected to each other on the entire circumference of the peripheral edge portion is prepared, and a plurality of pressing jigs are used. By arranging the peripheral portion so as to surround the peripheral portion and moving the plurality of pressing jigs in the direction along the flat plate-shaped surface of the packaging container while contacting the peripheral portion, the first portion and the second portion A gap is formed between the portion and the folded surface is folded to form a folded piece, and the packaging container is formed by the upper surface which is the convex polygonal surface of the first portion and the convex polygonal surface of the second portion. A method of assembling a packaging container, which includes a step of forming a box shape including a lower surface facing the upper surface and a side surface formed by an isosceles trapezoidal surface.

According to the present invention, it is possible to provide a method for assembling a packaging container that can be reused by returning it to a box-shaped state after being crushed to a flat state once.

A perspective view showing a box-shaped state of a packaging container that can be used in the method for assembling a packaging container according to an embodiment of the present invention. A perspective view showing a flat state of a packaging container that can be used in the method for assembling a packaging container according to an embodiment of the present invention. Top view of a blank of a packaging container that can be used in the method of assembling a packaging container according to an embodiment of the present invention. The figure which shows each process of the method of the packaging container which can be used in the method of assembling the packaging container which concerns on one Embodiment of this invention. Top view showing a modified example of the blank The figure explaining the method of assembling the packaging container which concerns on one Embodiment of this invention. The figure explaining the method of assembling the packaging container which concerns on one Embodiment of this invention. The figure explaining the method of assembling the packaging container which concerns on one Embodiment of this invention.

[Packaging container]
First, the packaging container 100, which is a packaging container that can be used in the method for assembling the packaging container according to the embodiment of the present invention, will be described with reference to the drawings. In the following description, in each embodiment and each modification, the same or corresponding configurations are designated by the same reference numerals, and the description thereof will be omitted as appropriate. Further, in the following description, for convenience, the vertical direction in which the packaging container is upright in a box-shaped state is referred to as a vertical direction.

The packaging container 100 is a container that can be deformed between a box-shaped state and a flat state, which is formed by overlapping and sealing the ends of blanks obtained by cutting a sheet material into a predetermined shape.

(Box type)
FIG. 1 shows a perspective view of the packaging container 100 in a box-shaped state. As shown in FIG. 1, the packaging container 100 in a box-shaped state includes a top surface 110, a bottom surface 130, a side surface 120, a side seal portion 140 in which the end portions of the sheet material are overlapped and sealed, and a sheet material. Includes a folded piece 150 formed by folding. In the packaging container 100, a gap (accommodation space) is formed by the upper surface 110, the lower surface 130, and the side surface 120. The folded piece 150 extends outward from the corner of the side surface 120 and is bent along the outer peripheral surface of the side surface 120. The side seal portion 140 extends outward from the center in the vertical direction of the side surface 120 and the folded piece 150, and is bent along the outer peripheral surfaces of the side surface 120 and the side seal portion 140. In the packaging container 100, as an example, the side seal portion 140 is along the side surface 120 and the folded piece 150 with the end edge facing the lower surface 130 side. An opening 111 is formed on the upper surface 110, and a spout 112 is attached to the opening 111 as an example.

(Flat state)
FIG. 2 shows a perspective view of the packaging container 100 in a flat state, and FIG. 3 shows a plan view of a blank of the packaging container 100. As shown in FIG. 2, the packaging container 100 in a flat state is composed of a first portion 170a and a second portion 170b in the shape of flat plates that overlap each other. As shown in FIG. 3, the blank for forming the packaging container 100 is composed of a blank 101a corresponding to the first portion 170a and a blank 101b corresponding to the second portion 170b. Note that FIG. 2A is a view of the packaging container 100 viewed from the upper surface 110 side, and FIG. 2B is a view of the packaging container 100 viewed from the lower surface 130 side. Further, FIG. 3A is a plan view of the blank 101a, and FIG. 3B is a plan view of the blank 101b.

The first portion 170a includes an upper convex polygonal surface 110a in which an opening 111 is formed, a plurality of upper isosceles trapezoidal surfaces 120a extending from each side of the upper convex polygonal surface 110a, and adjacent upper isosceles trapezoidal surfaces 120a. A first portion 170a along the plurality of upper folded surfaces 150a formed between the trapezoidal surfaces 120a and the edges of the upper isosceles trapezoidal surface 120a and the upper folded surface 150a opposite to the upper convex polygonal surface 110a. Includes an upper seal allowance 140a that constitutes a peripheral edge over the entire circumference of the outer edge of the.

The second portion 170b includes a lower convex polygonal surface 130a, a plurality of lower isosceles trapezoidal surfaces 120b extending from each side of the lower convex polygonal surface 130a, and adjacent lower isosceles trapezoidal surfaces. A second along the edge opposite to the plurality of lower folded surfaces 150b formed between the 120b and the lower convex polygonal surface 130a of the lower isosceles trapezoidal surface 120b and the lower folded surface 150b. Includes a lower seal allowance 140b that constitutes a peripheral edge over the entire outer edge of the portion 170b.

The upper convex polygonal surface 110a and the lower convex polygonal surface 130a are surfaces that are the upper surface 110 and the lower surface 130 of the packaging container 100 in the box shape, respectively. The shape of the upper convex polygonal surface 110a and the lower convex polygonal surface 130a is not limited as long as they are convex polygonal surfaces, and in the packaging container 100, as an example, they have a congruent rectangular shape. As an example, the upper convex polygonal surface 110a and the lower convex polygonal surface 130a may have similar shapes having different areas.

The plurality of upper isosceles trapezoidal surfaces 120a and the plurality of lower isosceles trapezoidal surfaces 120b are surfaces that are side surfaces 120 of the packaging container 100 in a box-shaped state. The shape of the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b is not limited as long as they are isosceles trapezoidal, and in the packaging container 100, as an example, the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b are It has a rectangular shape. At least one of the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b may have an isosceles trapezoidal shape that is not rectangular. Since the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b are provided corresponding to the number of sides of the upper convex polygonal surface 110a and the lower convex polygonal surface 130a, the number thereof is the upper convex polygonal surface 110. And the shape of the lower convex polygonal surface 130. In the packaging container 100, four upper isosceles trapezoidal surfaces 120a and four lower isosceles trapezoidal surfaces 120b are provided.

As shown in FIGS. 2 and 3, the upper isosceles trapezoidal surface 120a extends from each side of the upper convex polygonal surface 110a, and one of the two parallel sides is each side of the upper convex polygonal surface 110a. And. Further, the lower isosceles trapezoidal surface 120b extends from each side of the lower convex polygonal surface 130a, and one of the two parallel sides is set as each side of the lower convex polygonal surface 130. The side of the upper isosceles trapezoidal surface 120a on the upper seal allowance 140a side and the side of the lower isosceles trapezoidal surface 120b on the lower seal allowance 140b side are formed to have the same length.

The upper folded surface 150a and the lower folded surface 150b are surfaces that become folded pieces 150 of the packaging container 100 in a box-shaped state, and are surfaces that are folded in the process of deformation described later. Since the upper folded surface 150a and the lower folded surface 150b are formed between the adjacent upper isosceles trapezoidal surface 120a and each lower isosceles trapezoidal surface 120b, the numbers thereof are the upper isosceles trapezoidal surface 120a and the lower one. It is determined by the number of side isosceles trapezoidal surfaces 120b. In the packaging container 100, four upper folded surfaces 150a and four lower folded surfaces 150b are provided. In the packaging container 100, as an example, a folded ruled line 151 extending from the vertices of the upper convex polygonal surface 110a and the lower convex polygonal surface 130a toward the peripheral edges of the first portion 170a and the second portion 170b is provided. It is provided on the upper folded surface 150a and the lower folded surface 150b. By providing the folded ruled line 151, the upper folded surface 150a and the lower folded surface 150b can be easily folded at desired positions.

The upper seal allowance 140a and the lower seal allowance 140b are strip-shaped surfaces provided for connecting the first portion 170a and the second portion 170b at the peripheral edge portion. When connecting the first portion 170a and the second portion 170b, the first portion 170a and the second portion 170b are overlapped with each other, and the upper seal allowance 140a and the lower seal allowance 140b are respectively overlapped with each other. A side seal portion 140, which is a peripheral portion, is formed by sealing and adhering the facing surfaces. The shapes of the upper seal allowance 140a and the lower seal allowance 140b can be arbitrarily set as long as there are seal allowances that overlap each other in order to form the side seal portion 140 by overlapping. In the packaging container 100, as an example, in order to facilitate bending of the side seal portion 140 in the process of deformation described later, between the lower seal allowance 140b and the lower isosceles trapezoidal surface 120b and the lower folded surface 150b. A ruled line 160 is provided. The packaging container 100 formed by sealing the upper seal allowance 140a and the lower seal allowance 140b with each other has airtightness except for the opening 111.

The blanks 101a and 101b are formed by cutting a sheet material into a predetermined shape. As an example, the blanks 101a and 101b may be provided with a ruled line for partitioning each surface as shown by a thin line in FIG.

The sheet material used for the blanks 101a and 101b is not particularly limited, but for example, a laminated film in which a thermoplastic resin layer or a sealant layer is laminated on a paper base material layer can be preferably used. In addition to this, a barrier layer, a functional film, or the like may be added as appropriate according to the required functions.

(Transformation method)
Next, an example of a method of transforming the packaging container 100 in a flat state into a box-shaped state will be described using the packaging container 100. FIGS. 4A to 4D show a diagram illustrating an example of a method of deforming the container body 100.

First, as shown in FIG. 4A, the first portion 170a or the second portion 170b of the packaging container 100 in a flat state is placed on the peripheral portion (specifically, the upper side seal portion 140a and the upper side). Bend between the isosceles trapezoidal surface 120a and the upper folded surface 150a, or between the lower side seal portion 140b and the lower isosceles trapezoidal surface 120b and the lower folded surface 150b) to form the first portion 170a and the first portion 170a. Separate the part 170b of 2. As a result, a gap is formed between the first portion 170a and the second portion 170b, the upper convex polygonal surface 110a becomes the upper surface 110, the lower convex polygonal surface 130a becomes the lower surface 130, and the upper isosceles trapezoid The trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b serve as the side surface 120, and the upper side seal portion 140a and the lower side seal portion 140b serve as the side seal portion 140.

Further, as shown in FIG. 4B, the plurality of upper folded surfaces 150a are close to each other in common with the adjacent upper isosceles trapezoidal surface 120a, and the plurality of lower folded surfaces 150b are adjacent lower isosceles trapezoidal surfaces. The sides shared with the trapezoidal surface 120b approach each other. As a result, the upper folded surface 150a and the lower folded surface 150b are folded into a folded piece 150. At the same time, as shown by the arrow, the side seal portion 140 is bent along the ruled line 160 so that the end edge faces the lower surface 130 so as to follow the side surface 120. The side seal portion 140 may be bent along the side surface 120 so that the end edge faces the upper surface 110. In this case, by forming the ruled line 160 on the first portion 170a, the side seal portion 140 can be easily bent.

Next, as shown in FIG. 4 (c), the folded piece 150 is bent along the outer peripheral surface of the side surface 120. The direction in which the folded piece 150 is aligned is not limited, and as an example, as shown in FIG. 4 (c), two folded pieces 150 may be aligned along one side surface 120, or each of the folded pieces 150 is different. It may be along the side surface 120.

At this time, the folded piece 150 may be attached to the surface of the side surface 120. As a method of attaching the folded piece 150 to the side surface 120, for example, there is a method of using a heat seal, a hot melt adhesive, or the like. Further, by attaching with a removable joining member such as a hook-and-loop fastener or a snap button, the packaging container 100 transformed from the box-shaped state to the flat state can be used again as the box-shaped state, so that it is flat. The packaging container 100 in such a state can be reused.

By the above procedure, as shown in FIG. 4D, the packaging container 100 that was in a flat state can be transformed into a box-shaped state.

The box-shaped packaging container 100 can be flattened by a procedure opposite to the above procedure. Specifically, first, the folded piece 150 of the box-shaped packaging container 100 is separated from the side surface 120. Next, at the peripheral edge portion (specifically, along between the side seal portion 140 and the side surface 120), the first portion 170a and the second portion 170b are extended. Next, the gap between the first portion 170a and the second portion 170b is eliminated, and the first portion 170a and the second portion 170b are overlapped with each other to deform the packaging container 100 into a flat state. can do.

(Blank modification example)
In the above example, the packaging container 100 is formed by using the two blanks 101a and 101b corresponding to the first portion 170a and the second portion 170b, but these blanks are integrally formed. May be good. In the blank 102 shown in FIG. 5, a part of the peripheral edge of the blank corresponding to the first portion 170a and the second portion 170b is connected by the connecting portion 180.

When the packaging container 100 is formed by using the blank 102, for example, the first portion 170a and the second portion 170b are overlapped by folding back at the connecting portion 180, and then the upper sealing allowance 140a and the lower sealing allowance 140a and the lower sealing allowance are overlapped. Seal 140b. By integrally forming the blanks in this way, for example, when a sheet material is punched to form a blank, many blanks can be punched from one sheet material, so that a packaging container can be manufactured at low cost. Can be done.

When the first portion 170a and the second portion 170b of the packaging container formed by using the blank 102 are separated and deformed into a box-shaped state, the connecting portion 180 is extended. Further, when deformed to a flat state, the connecting portion 180 is folded back.

As described above, since the packaging container 100 can be easily deformed from a flat state to a box-shaped state, it can be returned to the box-shaped state and reused even after being crushed to the flat state once. Is. Further, since the packaging container 100 can be flattened and transformed into a box-shaped state as needed, the loading efficiency at the time of transportation is good, and the transportation and storage costs can be reduced.

[How to assemble the packaging container]
Next, the method of assembling the packaging container according to the embodiment of the present invention will be described with reference to the drawings, taking the packaging container 100 as an example.

(First Embodiment)
First, a method of assembling the packaging container according to the first embodiment using the assembling device 300 as an example will be described. FIG. 6 shows a cross-sectional view and a plan view illustrating a method of assembling the packaging container according to the first embodiment. In the plan view, the regulation member 330, which will be described later, will not be shown for convenience. The assembling device 300 includes a mounting table 310 and a plurality of pressing jigs 320. The mounting table 310 is a table provided with a horizontal surface on which the packaging container 100 is placed, and the plurality of pressing jigs 320 are jigs that move on the horizontal surface of the mounting table 310 to deform the packaging container 100.

The method for assembling the packaging container according to the first embodiment includes a first step ((a) of FIG. 6) in which the packaging container 100 is prepared and a plurality of pressing jigs 320 are arranged at predetermined positions, and a plurality of methods. The second step ((b) of FIG. 6) of making the packaging container 100 into a box shape by the pressing jig 320 is included.

In the first step, as shown in FIG. 6A, a flat packaging container 100 is prepared, and a plurality of pressing jigs 320 are arranged so as to surround the peripheral edge of the packaging container 100. At this time, the packaging container 100 is fixed on a mounting table 310 having a horizontal surface as an example. The mounting table 310 is provided with a hole 311 into which the spout 112 can be inserted, for example, on a horizontal surface, and the packaging container 100 is fixed with the spout 112 inserted into the hole 311. Four pressing jigs 320 are arranged around the fixed packaging container 100 so as to surround the peripheral edge portion. The number of the plurality of pressing jigs 320 is not limited to four, and can be appropriately adjusted according to the shape of the packaging container to be assembled. Each pressing jig 320 is arranged so as to face the side seal portion 140 which is the outer peripheral edge portion of the upper convex polygonal surface 110a and the lower convex polygonal surface 130a in a plan view.

In the second step, as shown in FIG. 6B, a plurality of pressing jigs 320 were brought into contact with the edge of the peripheral edge of the packaging container 100 and along the flat plate-shaped surface of the packaging container 100. Move in the direction. In the method of assembling the packaging container according to the first embodiment, the plurality of pressing jigs 320 each have an upper convex polygonal surface 110a and a lower convex polygonal surface 130a on the horizontal plane on the mounting table 310 as shown by arrows. Toward, it moves to the edge of the upper convex polygonal surface 110a and the lower convex polygonal surface 130a. It is preferable that each pressing jig 320 moves at the same speed at the same time.

When the peripheral edges are pressed by the pressing jigs 320 in a direction approaching each other, the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b rise from a flat state, and the upper convex polygonal surface 110a faces upward. And lifted, the lower convex polygonal surface 130a is pushed down downward. As a result, a gap is formed between the first portion 170a and the second portion 170b. At the same time, the upper folded surface 150a approaches the sides shared with the adjacent upper isosceles trapezoidal surface 120a, and the lower folded surface 150b approaches the sides shared with the adjacent lower isosceles trapezoidal surface 120b. The folded surface 150a and the lower folded surface 150b are folded to form the folded piece 150. The folded piece 150 can be more easily formed by folding the upper folded surface 150a and the lower folded surface 150b along the folded ruled line 151 described above.

Then, each pressing jig 320 moves to the edge of the upper convex polygonal surface 110a and the lower convex polygonal surface 130a, so that the packaging container 100 is the upper convex polygonal surface 110a of the first portion 170a. The upper surface 110, the lower surface 130 which is the lower convex polygonal surface 130a of the second portion 170b and faces the upper surface 110, and the side surface 120 formed by the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b. It can be a box type including. At this time, as shown in FIG. 6B, the side seal portion 140 is bent by each pressing jig 320 so that the end edge faces the lower surface 130 and runs along the side surface 120. The direction in which the side seal portion 140 is bent can be controlled by the ruled line 160. Specifically, by forming the ruled line 160 on only one of the first portion 170a and the second portion 170b as in the packaging container 100, it becomes easy to bend the ruled line 160 to the side where the ruled line 160 is provided. Therefore, the side seal portion 140 is provided with the ruled line 160 of the first portion 170a or the second portion 170b by pressing by moving the plurality of pressing jigs 320 in the direction along the flat plate-shaped surface ( In FIG. 6, it can be controlled so as to be bent toward the second portion 170b side). Further, by providing the ruled line 160 in both the first portion 170a and the second portion 170b and forming one ruled line 160 deeper than the other, the side seal portion 140 is bent to the side where the ruled line 160 is deeply formed. It can also be controlled as such. The side seal portion 140 may be bent along the side surface 120 so that the edge thereof faces the upper surface 110.

As shown in FIG. 6, the assembling device 300 may further include a regulating member 330 that regulates the upward deformation of the packaging container 100. By providing the regulating member 330, the upper convex polygonal surface 110a lifted upward and the lower convex polygonal surface 130a pushed downward in the second step can be moved from the vertical direction together with the mounting table 310. You can hold it down. Therefore, it is possible to prevent the upper surface 110 and the lower surface 130 from bulging outward and becoming rounded, and it is possible to sharply form the vertices and edge (sides) of the upper surface 110 and the lower surface 130, and the assembled package. The molding accuracy and design of the container 100 can be improved.

In the second step, in order to facilitate the formation of a gap between the first portion 170a and the second portion 170b, in at least one of the first step and the second step, the first step. Gas (air) may be blown between the first portion 170a and the second portion 170b through the opening 111 of the portion 170a. Specifically, as shown in FIG. 6, a nozzle 312 capable of blowing gas through the hole 311 of the mounting table 310 is inserted into the spout 112, and gas is blown out from the nozzle 312. As a result, the first portion 170a and the second portion 170b can be separated from each other by the blown gas, so that even if the force with which the plurality of pressing jigs 320 press the peripheral portion is relatively small, the first portion is quickly first. It becomes possible to form a gap between the portion 170a and the second portion 170b.

As described above, according to the method for assembling the packaging container according to the first embodiment, the packaging container 100 is brought into a box shape by a simple operation of moving a plurality of pressing jigs 320 by a slight distance. It can be easily deformed.

(Second Embodiment)
Next, the method of assembling the packaging container according to the second embodiment using the assembling device 301 as an example will be described focusing on the difference from the first embodiment. FIG. 7 shows a cross-sectional view and a plan view illustrating a method of assembling the packaging container according to the second embodiment. The assembling device 301 includes a mounting table 310 and a plurality of pressing jigs 321. That is, the difference between the assembling device 300 and the assembling device 301 is the plurality of pressing jigs 321.

As for the method of assembling the packaging container according to the second embodiment, as in the first embodiment, the first step of preparing the packaging container 100 and arranging the plurality of pressing jigs 321 ((a) of FIG. 7). ) And the second step ((b) of FIG. 7) of forming the packaging container 100 into a box shape.

In the first step, as shown in FIG. 7A, a flat packaging container 100 is prepared, and a plurality of pressing jigs 321 are arranged so as to surround the peripheral edge of the packaging container 100. The plurality of pressing jigs 321 are provided with a total of eight pressing jigs 321 in order to form each of the four folding pieces 150, two for each folding piece 150 as an example. The plurality of pressing jigs 321 are arranged so as to surround the peripheral edge of the packaging container 100 fixed on the mounting table 310.

In the second step, as shown in FIG. 7B, the plurality of pressing jigs 321 are moved in the direction along the flat plate-shaped surface of the packaging container 100 while being in contact with the edge of the peripheral edge portion. .. In the method of assembling the packaging container according to the second embodiment, the plurality of pressing jigs 321 are placed on the mounting table 310 in pairs as shown by arrows, and the upper folded surface 150a and the lower folded surface are respectively. Move in the direction of folding 150b. Specifically, the pressing jig 321 moves toward the vertices of the upper convex polygonal surface 110a and the lower convex polygonal surface 130a in a plan view, and at each vertex, any one of the plurality of pressing jigs 321. The two approach each other and sandwich the vicinity of the connecting portion of each folded piece 150 with the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b (that is, the side surface 120).

When the peripheral edges are pressed by the plurality of pressing jigs 321 in the directions approaching each other, the upper convex polygonal surface 110a of the first portion 170a is lifted upward and, as in the first embodiment, When the lower convex polygonal surface 130a of the second portion 170b is pushed downward, a gap is formed between the first portion 170a and the second portion 170b. At the same time, the two pressing jigs 321 move in the direction of approaching each other while being in contact with the vicinity of the connecting portion, and gradually sandwich the upper folded surface 150a and the lower folded surface 150b. Therefore, as the two pressing jigs 321 approach each other and the contact points between the pressing jig 321 and the upper folded surface 150a and the lower folded surface 150b increase, the vicinity of the connecting portion is more reliable than in the first embodiment. It is sandwiched between the pressing jig 321 surfaces. As a result, the folded piece 150 becomes flat along the surface of the pressing jig 321 and the side of the connecting portion is formed sharply. Further, due to the effect of sharpening the sides of the connecting portion, the sides of the upper surface 110 and the lower surface 130 connected to the sides are easily formed sharply, which is preferable.

The surface (pressing surface) for pressing the folded piece 150 of the pressing jig 321 preferably has a shape in which a portion (edge) in contact with the side surface 120 follows the surface of the side surface 120. Specifically, when the connecting portion between the side surface 120 and the folded piece 150 is a straight line as in the packaging container 100, the edge of the pressing surface can be formed in a straight line. When the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b are inclined with respect to the vertical direction, the edge of the pressing surface can be formed according to the inclination. As a result, the side of the connecting portion can be reliably and sharply formed by the pressing jig 321.

As described above, according to the method for assembling the packaging container according to the second embodiment, the packaging container 100 is brought into a box shape by a simple operation of moving the plurality of pressing jigs 321 by a slight distance. It can be easily deformed. Further, since each folded piece 150 is formed by sandwiching it with any two of the plurality of pressing jigs 321, the highly designed packaging container 100 includes the folded piece 150 whose side shared with the side surface 120 is sharply bent. Can be obtained.

The assembly device 301 may also further include a regulating member 330 and a nozzle 312.

(Third Embodiment)
Next, the method of assembling the packaging container according to the third embodiment using the assembling device 302 as an example will be described focusing on the differences from the first and second embodiments. FIG. 8 shows a cross-sectional view and a plan view illustrating a method of assembling the packaging container according to the third embodiment. The assembling device 302 includes a mounting table 310 and a plurality of pressing jigs 322. That is, the difference between the assembling device 300 and the assembling device 301 is the plurality of pressing jigs 322.

Similar to the first and second embodiments, the method of assembling the packaging container according to the third embodiment is also the first step of preparing the packaging container 100 and arranging the plurality of pressing jigs 322 (FIG. 8). (A)) and a second step ((b) of FIG. 8) of forming the packaging container 100 into a box shape are included.

In the first step, as shown in FIG. 8A, a flat packaging container 100 is prepared, and a plurality of pressing jigs 322 are arranged so as to surround the peripheral edge of the packaging container 100. The plurality of pressing jigs 322 are composed of four pressing jigs 322. The plurality of pressing jigs 322 are arranged so as to surround the peripheral edge of the packaging container 100 fixed on the mounting table 310.

As shown in FIG. 8, the pressing jig 322 extends outward at a predetermined angle from both ends of the first surface 322a facing the peripheral edge portion in the first step and the first surface 322a in a plan view. Includes surface 322b of 2. The first surface 322a is a surface provided for pressing the peripheral edges in the direction of approaching each other in the second step. Further, the second surface 322b is provided to sandwich the folded piece 150 together with the second surface 322b of the adjacent pressing jig 322 in the second step. Therefore, in the first step, the plurality of pressing jigs 322 are arranged so that the first surface 322a faces the peripheral edge portion of the packaging container 100 fixed on the mounting table 310. Further, it is preferable that the second surface 322b is formed in an area that can cover all the folded pieces 150 in a state where the packaging container 100 is formed in a box shape. Further, the connecting portion between the first surface 322a and the second surface 322b of the pressing jig 322 preferably has a shape along the surface of the side surface 120 with the packaging container 100 formed in a box shape. Specifically, when the connecting portion between the side surface 120 and the folded piece 150 is a straight line as in the packaging container 100, the connecting portion can be formed in a straight line. Further, when the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b have an inclination in the vertical direction, the connecting portion can be formed according to the inclination. As a result, the side of the connecting portion can be reliably and sharply formed by the pressing jig 321.

In the second step, as shown in FIG. 8B, the plurality of pressing jigs 322 are moved in the direction along the flat plate-shaped surface of the packaging container 100 while being in contact with the edge of the peripheral edge portion. .. In the method of assembling the packaging container according to the third embodiment, the plurality of pressing jigs 322 are placed on the mounting table 310 as shown by arrows, and the first surface 322a is on the upper convex polygonal surface 110a and the lower side, respectively. It moves until it touches the edge of the convex polygonal surface 130a. At the same time, the second surface 322b of the adjacent pressing jig 322 approaches each other and becomes the upper isosceles trapezoidal surface 120a and the lower isosceles trapezoidal surface 120b (that is, the side surface 120) of each folded piece 150. It sandwiches the vicinity of the connecting part of.

By pressing the peripheral edges in the directions closer to each other by the first surfaces 322a of the plurality of pressing jigs 322, the upper convex polygonal surface 110a of the first portion 170a is similarly pressed in the first and second embodiments. Is lifted upward and the lower convex polygonal surface 130a of the second portion 170b is pushed downward, so that a gap is formed between the first portion 170a and the second portion 170b. Will be done. At the same time, the second surface 322b of the adjacent pressing jig 322 moves in the direction of approaching each other while being in contact with the vicinity of the connecting portion, and gradually moves the upper folded surface 150a and the lower folded surface 150b. Insert the whole. Therefore, as the two pressing jigs 322 come closer to each other and the contact points between the pressing jig 322 and the upper folded surface 150a and the lower folded surface 150b increase, the entire folded piece 150 becomes more than the second embodiment. It is securely sandwiched between the pressing jig 322 surfaces. As a result, the folded piece 150 becomes flat along the 322 surface of the pressing jig, and the sides of the connecting portion and the sides connecting the vertices of the upper surface 110 and the lower surface 130 and the side seal portion 140 are sharply formed. Further, due to the effect of sharpening the sides of the connecting portion, the sides of the upper surface 110 and the lower surface 130 connected to the sides are easily formed sharply, which is preferable.

As described above, according to the method for assembling the packaging container according to the third embodiment, the packaging container 100 is brought into a box shape by a simple operation of moving a plurality of pressing jigs 322 by a slight distance. It can be easily deformed. Further, since each folded piece 150 is formed by being sandwiched between adjacent pressing jigs 322, the side shared with the side surface 120 and the side connecting the vertices of the upper surface 110 and the lower surface 130 to the side seal portion 140 are sharply bent. It is possible to obtain a highly designed packaging container 100 having the folded piece 150.

The assembling device 302 may further include a regulating member 330 and a nozzle 312.

In the above description, the method of assembling the packaging container according to each embodiment has been described by taking the packaging container 100 as an example. However, the packaging container includes a first portion and a second portion having a flat plate shape that overlap each other. An isosceles trapezoidal shape in which the first part and the second part extend from each side of a convex polygonal surface and a convex polygonal surface, respectively, and each side is one of two parallel sides. A packaging container that has an isosceles trapezoidal surface, a plurality of folded surfaces provided between adjacent isosceles trapezoidal surfaces, and a peripheral edge that covers the entire circumference of the outer edge, and is connected to each other on the entire circumference of the peripheral edge. If there is, it is not limited to the packaging container 100.

INDUSTRIAL APPLICABILITY The present invention can be suitably used for manufacturing a packaging container formed by bending a sheet material into a box shape and superimposing and sealing the ends thereof.

100 Packaging container 101a, 101b Blank 110 Upper surface 110a Upper convex polygonal surface 111 Opening 120 Side surface 120a Upper isosceles trapezoidal surface 120b Lower isosceles trapezoidal surface 130 Lower surface 130a Lower convex polygonal surface 140 Side seal part 140a Upper seal allowance 140b Lower seal allowance 150 Folded piece 150a Upper folded surface 150b Lower folded surface 151 Folded ruled line 170a First part 170b Second part 180 Connection part 300, 301, 302 Assembly device 310 Mounting stand 320, 321, 322 Multiple presses Jig 330 Regulator

Claims (4)

How to assemble a packaging container
It has a first portion and a second portion of a flat plate shape that overlap each other, and the first portion and the second portion are a convex polygonal surface of a convex polygon shape and each side of the convex polygonal surface, respectively. An isosceles trapezoidal surface extending from the isosceles trapezoidal surface having each side as one of two parallel sides, a plurality of folded surfaces provided between the adjacent isosceles trapezoidal surfaces, and an outer edge. A step of preparing a packaging container having a peripheral edge portion extending over the entire circumference and connecting to each other on the entire circumference of the peripheral edge portion, and arranging a plurality of pressing jigs so as to surround the peripheral edge portion.
By moving the plurality of pressing jigs in a direction along the flat plate-shaped surface of the packaging container while abutting the peripheral portions, between the first portion and the second portion. By forming a gap and folding the folded surface to form a folded piece, the packaging container is provided with the upper surface of the first portion, which is the convex polygonal surface, and the convex polygonal surface of the second portion. This includes a step of forming a box shape including a lower surface facing the upper surface and a side surface formed by the isosceles trapezoidal surface.
How to assemble a packaging container. In the process of making the packaging container into a box shape,
As the plurality of pressing jigs move, any two of the plurality of pressing jigs sandwich the vicinity of the connecting portion of each of the folded pieces with the isosceles trapezoidal surface in close proximity to each other.
The method for assembling a packaging container according to claim 1. In the process of making the packaging container into a box shape,
A gas is blown between the first portion and the second portion through an opening formed in the convex polygonal surface of the first portion.
The method for assembling a packaging container according to claim 1 or 2. The folded surface has a folded ruled line extending from the convex polygonal surface toward the peripheral edge portion.
In the process of making the packaging container into a box shape,
The folded piece is formed by folding the folded surface along the folded ruled line.
The method for assembling a packaging container according to any one of claims 1 to 3.

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