JPH04294716A - Packing method - Google Patents

Abstract

PURPOSE:To increase packing work efficiency and reduce packing material cost. CONSTITUTION:In this packing method, a triangular packing article (A) is wrapped by a sheet of square plastic film material 11. Two triangular faces 1, 2 of a packing article are directed to both sides and the tops 6 of both faces are positioned on the diagonal line of the sheet member and the packing article is placed in the middle of the sheet material. The outerside parts of both faces 1, 2 of the sheet material are raised along the sides and these raised pieces 14, 15 are folded on the square faces 4, 5 of the front and rear parts of the packing article. And the respective bases of both folded tongue pieces 16 formed at the upper edge of packing article and folded pieces 17, 18 formed at the lower edge of the faces 4, 5 are heat-sealed in the folding process. And the folded and superimposed parts of both raised pieces are heat-sealed to pack the article.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a packaging method for packaging a triangular object having two triangular faces and three square faces, and particularly relates to a packaging method for packaging an object to be wrapped in a single plastic film. The present invention relates to a packaging method for packaging with sheet material made of The packaging method of the present invention is suitable, for example, for packaging triangular foods such as sandwiches and sugar toast.

0002

2. Description of the Related Art Conventionally, for example, sandwiches are generally packaged as follows. First, this conventional packaging method will be explained with reference to FIG. 9. A sandwich is made into a substantially square shape and then cut in half along the diagonal line to form a triangle. This triangular sandwich, that is, a triangular packaged object A, is made into a triangle as shown in Figure (A). It is placed in a packaging bag B (generally called a triangular bag) formed into a roughly trapezoidal shape using plastic film. Then, as shown in Figure (C), the front piece D of the opening C of the bag B is folded back inward. Next, as shown in the same figure (D) and (E), both sides E and F of the opening C are folded inward,
Heat the top of the side piece F to seal it by welding H. Next, the folded edge piece I formed by the rear piece G of the opening C of the bag B and a part of the side pieces E and F in the above process is folded over the side piece F, as shown in the figure (F). The top of the folded lug I is heated and sealed with welding J, and then packaged. According to this method, the item to be packaged is hermetically sealed and neatly packaged. Then, this packaging work is automated using an automatic packaging machine (however, the items to be packaged are
The process of putting it into the machine is done manually.

0003

However, since the conventional packaging method described above uses a packaging bag for packaging, it has the following problems.

[0004] That is, the above-mentioned package B generally includes:
Two flexible and thin plastic film sheets are overlapped and the bottom part K and both sides L and L of the bag B are melt-sealed using a melt-sealer (not shown) as shown in FIG. 9(A). The bag B has a generally trapezoidal shape, and the manufacturing process for this bag B is quite time-consuming. Therefore, the cost of packaging materials becomes high. Furthermore, since the bag B is made of a thin sheet material, it is difficult to handle and difficult to open. Therefore, it takes time and effort to put the items to be packaged into the bag.

The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a packaging method that can save labor and reduce the cost of packaging materials.

[0006]

[Means for Solving the Problems] In order to solve the problems of the conventional method, the packaging method according to the present invention provides a packaging method for packaging an object having a triangular shape having two triangular faces and three square faces. A packaging method in which the two triangular surfaces of the packaged object are oriented toward both sides, and the vertices of both sides are approximately on the diagonal line of the sheet material. a step of placing the item to be packaged in the center of the sheet material, and a step of raising the outer portions of the triangular surfaces of the sheet material along both surfaces to form a rising piece; a step of folding the one rising piece onto the front and rear square surfaces of the packaged object; a step of superimposing the other rising piece on the folded rising piece and folding it back onto both the square surfaces; , folding tongue pieces along the upper edges of the front and rear square surfaces of the packaged object formed by the above-mentioned double-folding process, and respective bases of the folding pieces protruding outward from the lower edges of the above-mentioned both square-shaped surfaces; and a step of welding and sealing the base from one side to the other, and a step of welding and sealing the folded portions of the two rising pieces. It is.

[0007]

[Function] In the packaging method according to the present invention, since the item to be packaged is packaged with a single sheet material, the labor of manufacturing a packaging bag can be omitted, and the work of stuffing the bag into the bag can also be eliminated. Then, the bases of each of the folded tongue pieces formed along the upper edges of the front and rear square surfaces of the packaged object and the folded pieces formed so as to protrude outward from the lower edges of both of the above-mentioned square shaped planes are attached. By welding and sealing these bases from one side to the other, and by welding and sealing the folded portions of both rising pieces, the article to be packaged is hermetically sealed with the sheet material.

[0008]

[Embodiment] An embodiment of the packaging method according to the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing the packaging process of an embodiment of the packaging method of the present invention, and FIG. 2 is a process in which the two rising pieces are overlapped and folded on the front and rear square surfaces of the packaged object. FIG. 3 is an enlarged perspective view showing the folded tongue piece formed along the upper edge of the front and rear square surfaces of the packaged object and the lower edge of both square surfaces during the same work process. FIG. 4 is an enlarged perspective view showing the step of welding and sealing the base of the folded piece formed to protrude toward the side and the folded portion of both rising pieces. It is a perspective view which expands and shows the process of folding back.

In the above figure, the object to be packaged A is formed into a triangular shape having two triangular surfaces 1 and 2 and three square surfaces 3, 4 and 5. In the packaging method of the present invention, the object to be packaged A is wrapped in a rectangular flexible sheet material 11 made of plastic, and the packaging is carried out in the following steps.

[0010] The sheet material 11 is such that the rising pieces, which will be described later, are folded over each other on both rectangular surfaces 4 and 5 of the packaged object A with a width that is approximately 1/3 of the width of the surfaces 4 and 5. It is formed into a rectangle of size. Therefore, first, as shown in FIG.
1 on the diagonal line, that is, the corners 12, 12 of the sheet material 11
The object to be packaged A is placed on the center of the sheet material 11 approximately on the line connecting the two (the same principle is true on the diagonal line on the corners 13 and 13 sides of the sheet material 11). As a result, the packaged object A
is placed on the sheet material 11 with the rectangular surface 3 as the bottom surface. Next, as shown in FIG. 1(B), the outer portions of the upper triangular surfaces 1 and 2 of the sheet material 11 are raised along the both surfaces 1 and 2. As a result, the packaged object A
Rising pieces 14 and 15 are formed on both sides of the sheet material 11.

Next, as shown in FIG. 1(C), one of the rising pieces 14 is attached to the front and rear square surfaces 4, 5 of the packaged object A.
At the same time, as shown in FIG. 1(D), the other rising piece 15 overlaps the folded rising piece 14 and is folded back to both quadrangular surfaces 4 and 5. Through this process, Figure 1 (D
) and as shown in FIG.
are formed, and triangular folded pieces 17, 18 protruding outward from the lower edges are formed on the lower edges of both the square surfaces 4, 5.

Next, as shown in FIG. 1(E), the base of the folded tongue piece 16 and the bases of the folded pieces 17 and 18 are hung from one side of each base to the other to form a welded seal 1.
9, 20, 21, and the folded portions of the two rising pieces 14, 15 are welded and sealed 22, 23. Through this step, the item A to be packaged is sealed and packaged. Here, the seals 19, 20, 21 of the respective bases can be achieved, for example, by squeezing the bases of the folded tongue piece 16 and the folded pieces 17, 18 with a pair of heating elements (not shown); The sealing of the folded portions 22 and 23 can be performed, for example, by bringing a heating element (not shown) into contact with the folded portions.

Next, the folded tongue piece 16 and the folded pieces 17, 18 are each folded inward, and each of these pieces 16,
17 and 18, and this fixing process can be performed, for example, by pasting adhesive tape 24 from one folded piece 17 to the other folded piece 18, as shown in FIG. As a result, the folded tongue piece 16 and the folded pieces 17 and 18 are pressed down with the tape 24 and fixed in an orderly manner.

FIG. 6 shows another embodiment of the fixing means for each piece 16, 17, 18. In this embodiment, a cap body 25 is placed on the upper half of the package packaged as described above to secure each piece. That is, the cap body 25 is made of thin plastic or the like, and is formed in a size and shape that fits and covers the upper half of the packaged object A, as shown in FIGS. 6 and 7. Then, with the folded tongue piece 16 and the folded pieces 17 and 18 folded back as described above, the cap body 25 is placed over the upper half of the packaged object A, and the appropriate part of the cap body 25 ( Here, the parts corresponding to both folded pieces 17 and 18) are spot welded 2.
6, 26, and the cap body 25 is fixed to the packaged object side. As a result, the folded tongue piece 16 and the folded piece 17,1
8 is held down by the cap body 25 and fixed neatly.

[0015] The packaging method according to the present invention is for packaging an object through the above-described steps. The above-mentioned work steps can be performed mechanically using an automatic packaging machine, and can be performed, for example, by the following method. That is, an arbitrary number of work plates are arranged in parallel on the conveyor device, and each plate is configured to run endlessly and intermittently in a predetermined direction at a predetermined speed. Then, a raw plastic film of a predetermined width wound into a roll is intermittently fed onto the plate at a predetermined speed, and the raw film is cut into a predetermined length to form a rectangular sheet material 11. do. Then, the packaged items A are placed one by one on the sheet material on the plate as described above (this work is done manually), and the packaged items A are transported by a conveyor device. Each means responsible for each of the above-mentioned work steps is arranged in the transfer path, and these means are operated in conjunction with each other at a predetermined timing to automatically package the product.

[0016]

[Effects of the Invention] As explained above, since the present invention is for packaging an object with a single sheet material, it is possible to save time and effort in manufacturing packaging bags as in the prior art. Therefore, the cost of packaging materials can be reduced, and the work of stuffing the packaged items into the bag can also be omitted. In addition, the respective bases of the folding tongue pieces formed along the upper edges of the front and rear square surfaces of the packaged object and the folding pieces formed so as to protrude outward from the lower edges of both of the above-mentioned square shaped surfaces. Since each of these bases is welded and sealed from one side to the other, and the folded portions of both rising pieces are welded and sealed, the item to be packaged is sealed with the sheet material. , neatly packaged.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the packaging process of an embodiment of the packaging method of the present invention.

FIG. 2 is an enlarged perspective view of the process shown in FIG. 1 (D) during the work process shown in FIG. 1;

FIG. 3 is an enlarged perspective view of the process shown in FIG. 1 during the work process shown in FIG. 1;

FIG. 4 is an enlarged perspective view of the process shown in FIG. 1 during the work process shown in FIG. 1;

FIG. 5 is a perspective view showing an embodiment of a means for fixing a folded tongue piece and both folded pieces.

FIG. 6 is a perspective view showing another embodiment of a fastening means for a folded tongue piece and both folded pieces.

7 is a perspective view of a cap body used in the fastening means shown in FIG. 6; FIG.

FIG. 8 is a perspective view of a triangular packaged object.

FIG. 9 is an explanatory diagram showing the packaging process of a conventional packaging method.

[Explanation of symbols]

A Items to be packaged 1, 2 Triangular surfaces 3, 4, 5 Square surfaces 6 Vertex 11 Plastic film sheet material 16 Folded tongue pieces 17, 18 Folded pieces

Claims (1)

[Claims] Claim 1. A packaging method for wrapping a triangular packaged object having two triangular faces and three square faces with a single square flexible plastic film sheet material, comprising: a step of turning the two triangular surfaces of the object to be packaged to both sides, aligning the vertices of both surfaces approximately on the diagonal line of the sheet material, and placing the object to be packaged in the center of the sheet material; a step of raising the outer part of the triangular surface along both sides to form a rising piece; a step of folding the one rising piece onto the front and rear square surfaces of the packaged object; superimposing the other rising piece on the folded rising piece and folding it back onto both of the quadrangular faces;
The folding tongue pieces along the upper edges of the front and rear square surfaces of the packaged object formed by the double folding process and the bases of the folding pieces protruding outward from the lower edges of the square surfaces. A packaging method comprising the steps of welding and sealing the base from one side to the other, and welding and sealing the folded portions of the two rising pieces. .