JP3030432U - Lid of packaging container, intermediate for manufacturing lid and packaging container - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a lid of a packaging container that can reduce material loss and reduce the manufacturing cost, an intermediate for manufacturing the same, and a packaging container. SOLUTION: A lid 4 having a rectangular shape as a whole is provided with a flat peripheral edge portion 4.
c is included. The corners 4d of the peripheral edge 4c are formed at right angles. The peripheral side wall 3 of the container body 1 has a drop-in step portion 3a for fitting the peripheral edge portion 4c of the lid body 4 to the inner periphery of the upper edge portion. The lid 4 is a material sheet,
It is obtained by cutting a manufacturing intermediate body in which a plurality of rows of lid-shaped lid material are formed. Since adjacent lid materials are cut and separated by a single cutting line, no material loss occurs between them.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a lid attached to and detached from a container body, an intermediate for manufacturing the lid, and a packaging container including the lid.

[0002]

[Prior art]

 Conventionally, as a packaging container, for example, a folded box container, as shown in FIG. 6, a groove 15 is formed on the entire peripheral back side of a peripheral edge portion 11 of a lid body 10 into which an upper portion 14 of a peripheral side wall 13 of a container body 12 can be introduced. There was something I did. Usually, as shown in FIG. 7, the four corners 16 of the peripheral edge portion 11 of the lid 10 are rounded. This is because the above-mentioned four corners 16 are formed by three surfaces which are orthogonal to each other and have relatively high rigidity, and if they are sharp, they will cause a problem in handling.

Generally, in order to manufacture the lid body 10, first, a long material sheet having a predetermined width is used to mold by heating and pressing, and as shown in FIG. A manufacturing intermediate body 20 having a plurality of rows A1 and A2 of a lid body material 21 (the lid body material 21 is already given the outer shape of the lid body 10) is manufactured, and then the manufacturing intermediate body 20 is manufactured. The intermediate body 20 is cut along a predetermined cutting line (indicated by an alternate long and short dash line in the figure) to obtain the lid body 10.

[0004]

[Problems to be solved by the device]

 Conventionally, as shown in FIG. 8A, a belt-shaped trimming zone 22 having a predetermined width d and continuously extending in the material sheet feeding direction P is provided between adjacent rows A1 and A2. Has been. That is, the rows A1 and A2 of the adjacent lids are cut and separated by two cutting lines. The trimming zone 22 is provided as described above for the following reasons.

That is, if the sheet 20 is to be cut without the trimming zone 22 to obtain the lid body 10, as shown in FIG. 8B, four adjacent lid body materials having round four corners are used. It is necessary to separate the star-shaped part 23 partitioned between the two 21 from each lid material 21, but the separated star-shaped part 23 remains attached to one of the lids and is defective. There is a risk that Therefore, the trimming zone 22 is provided to connect the star-shaped portions 23, and these are collectively separated from the lid material 21.

However, as described above, the trimming zone 22 having the predetermined width d results in a loss of material, which in turn raises the manufacturing cost. The present invention has been made in view of the above problems, and an object of the present invention is to provide a lid for a packaging container, a manufacturing intermediate for the lid, and a packaging container that can reduce material loss and reduce manufacturing cost. Is to provide.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the lid of the present invention is characterized in that it includes a rectangular plate-shaped peripheral portion as a whole, and that the four corners of the peripheral portion are formed into right-angled corner portions. With such a lid, when at least two rows of lid materials are continuously formed by sheet molding, the lid materials can be cut and separated with a single cutting line. As a result, it is possible to eliminate the material loss that has conventionally occurred.

That is, in order to manufacture the above-mentioned lid, the lid material provided with the lid shape is formed on a long material sheet in a continuous manner for at least two rows, and adjacent lid bodies are formed. The material manufacturer preferably uses a manufacturing intermediate that is cut and separated along a single cutting line. Further, in the case of a packaging container provided with the above lid body and a container body having a drop step portion capable of fitting the peripheral edge portion of the lid body formed on the inner periphery of the upper edge portion of the peripheral side wall, the above lid body Even if the peripheral edge portion has a flat plate-shaped corner portion, it is preferable because good fitting with the container body can be achieved.

[0009]

[Embodiment of device]

 A preferred embodiment of the present invention will be described with reference to the accompanying drawings. 1 is a partially cutaway side view of a packaging container including a lid according to an embodiment of the present invention, FIG. 2 is a plan view of the lid, and FIG. 3 is a main part of a lid and a container body. FIG. 4 is a partially broken exploded perspective view, and FIG. 4 is a plan view of a manufacturing intermediate body when the lid body is formed into a sheet.

Referring to FIG. 1, a container body 1 is a folded box container including a bottom surface portion 2 and a rectangular frame-shaped peripheral side wall 3 joined to a peripheral portion of the bottom surface portion 2. On the inner circumference of the upper part of the peripheral side wall 3, a drop step 3a for fitting the transparent lid 4 is formed. For example, a foamed sheet made of polystyrene can be used as the peripheral side wall 3, and a non-foamed sheet made of polystyrene, for example, can be bonded and used as the bottom surface portion 2. It is preferable that the peripheral side wall 3 and the bottom surface portion 2 are joined by heat fusion. The container body 1 has a frame-shaped peripheral side wall 3 in which a joint material is heat-sealed to form a frame-shaped peripheral side wall 3 and a separately formed bottom surface portion 2 are heat-treated together. It may be manufactured by joining by fusion, or a bead-in-mold molded product in which the peripheral side wall 3 and the bottom face portion 2 are integrated can be used as the container body 1.

The lid 4 has a rectangular main body 4 a, an annular V-shaped section 4 b surrounding the main body 4 a, and a flat plate-shaped body surrounding the V-shaped section 4 b and parallel to the main body 4 a. And a peripheral portion 4c. The peripheral portion 4c is set to be one step lower than the main body portion 4a, and the peripheral portion 4c is fitted to the drop-in step portion 3a of the peripheral side wall 3 of the container body 1 described above. As a material of the lid body 4, a non-foamed sheet of polyethylene can be exemplified.

The corners 4d of the peripheral edge 4c of the lid 4 are formed at right angles. When manufacturing the lid 4, the manufacturing intermediate 5 as shown in FIG. 4 is first manufactured, and the manufacturing intermediate 5 is cut to obtain a plurality of lids. This manufacturing intermediate body 5 is formed by continuously molding lid material 6 for a plurality of rows B1 and B2 along the material sheet feeding direction P, and each lid material 6 has already been used as the lid 4. The outer shape of the lid material 6 is omitted in FIG. 4 for simplicity. In this intermediate body 5 for manufacture, adjacent lid body materials 6 are cut and separated by a single cutting line 7. That is, even if the terminal materials 6 are separated from each other, no material loss occurs between them.

Further, even if each corner 4d of the lid 4 is formed at a corner, since the corner is not a three-dimensional three-dimensional shape as shown in the conventional example, the rigidity is not so high. However, since it is so-called internally fitted to the drop-in step portion 3a of the peripheral side wall 3, the corner portion does not project, and there is no problem in handling. It should be noted that the present invention is not limited to the above-described embodiment, and as shown in FIG. 5, for example, the drop-in step portion 3a of the container body 1 has a wedge-shaped cross section, and the peripheral edge portion 4c of the lid 4 is used. If the fitting space 8 is narrowed as it goes upward, the fitting can be made more reliable.

Besides, various modifications can be made within the scope of the present invention.

[0015]

[Effect of device]

 As described above, according to the present invention, it is possible to reduce material loss when the lid is formed into a sheet, and thus it is possible to provide the lid and the packaging container at low cost.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a packaging container including a lid according to an embodiment of the present invention.

FIG. 2 is a plan view of a lid.

FIG. 3 is a partially cutaway exploded perspective view of a main part of a lid and a peripheral side wall of a container body.

FIG. 4 is a plan view of an intermediate body for manufacturing a lid body.

FIG. 5 is a sectional view of a packaging container including a lid according to another embodiment of the present invention.

FIG. 6 is a partially cutaway side view of a conventional packaging container.

FIG. 7 is a partially cutaway perspective view of a main part of a conventional lid.

FIG. 8A is a plan view of a conventional intermediate body for manufacturing a lid, and FIG. 8B is a plan view of a main portion of the intermediate body for manufacturing when a trimming zone is not provided.

[Explanation of symbols]

 1 Container Main Body 3 Peripheral Side Wall 3a Drop-in Step 4 Lid 4c Peripheral 4d Corner 5 Manufacturing Intermediate 6 Lid Material 7 Cutting Line

Claims (3)

[Scope of utility model registration request] 1. A lid of a packaging container, characterized in that it comprises a rectangular plate-shaped peripheral portion as a whole, and each corner portion of the peripheral portion is formed into a right-angled corner portion. 2. An intermediate body for manufacturing a lid, when a lid of a packaging container according to claim 1 is formed into a sheet, and a lid material provided with a lid shape on a long material sheet. Is formed continuously in at least two rows, and adjacent lid body materials are cut and separated along a single cutting line. 3. A packaging container comprising the lid body according to claim 1 and a container body having a drop step portion capable of fitting the peripheral edge portion of the lid body formed on the inner periphery of the upper edge portion of the peripheral side wall.