JPH0582827U - Sealed container - Google Patents

Abstract

(57) [Summary] Sealed container [Purpose] The container body has both appropriate flexibility and rigidity to ensure the necessary rigidity of the container body without impairing the cuttability of the thin portion, and Prevent the occurrence of catching mistakes. [Structure] Cutting guide thin-walled portions 31, 32 for forming an opening in the end wall 23
50 to 70 wt% of the material of the one-end-opened container body 11 provided with
Of high density polyethylene and 50 to 30 Wt% of low density polyethylene.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sealed container for storing desserts, drinks and the like.

[0002]

[Prior Art]

 As a container of this type, it is known that a thin wall portion in a cutting proposal for forming an opening is provided on an end wall of a tubular container body with one end open, and the material of the container body is low density polyethylene.

[0003]

[Problems to be solved by the device]

 Low density polyethylene is highly flexible. Therefore, the thin portion can be easily cut and the container can be easily opened, but on the other hand, the rigidity of the container body is difficult.

When manufacturing a container, it may be necessary to grip the container body. In this case, if the rigidity of the container body is poor, the container body is likely to be deformed, and it may not be able to be grasped well. Such a catching mistake will hinder the flow of the production line.

An object of the present invention is to solve the above problems and provide a sealed container that can be manufactured without hindering the flow of the manufacturing line.

[0006]

[Means for Solving the Problems]

 The hermetically sealed container according to the present invention is a hermetically sealed container having an end wall provided with an annular cutting guide thin wall portion for forming an opening, wherein the material of the container body is high density polyethylene of 50 to 70 Wt%. , 50 to 30 Wt% of low density polyethylene.

[0007]

In the hermetically sealed container according to the present invention, the material of the container body is a mixture of high density polyethylene of 50 to 70 Wt% and low density polyethylene of 50 to 30 Wt%. It also has rigidity.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, the hermetically sealed container includes a container main body 11 and a bottom lid 12 provided at the lower end opening of the container main body 11.

The container main body 11 is composed of an upper tapered taper tubular body wall 21 and a top wall 23 which is connected to an upper end portion of the tubular body wall 21 through a connecting portion 22 having an inverted U-shaped cross section.

A stacking reduced diameter portion 24 is provided near the upper end of the body wall 21 so as to form a step portion 25 with respect to the lower portion thereof. A flange 26 is provided at the lower end opening edge of the body wall 21.

A circular thin portion 31 is provided near the outer periphery of the top wall 23. A U-shaped thin portion 32 is provided on the inner side of the circular thin portion 31. One U-shaped tip of the U-shaped thin portion 32 is smoothly connected to the circular thin portion 31, but the other tip ends before reaching the circular thin portion 31. A knob ring 33 is integrally provided near the U-shaped base of the U-shaped thin portion 32 and rising from the inside thereof.

As shown in detail in FIGS. 4 and 5, the circular thin portion 31 and the U-shaped thin portion 32 are provided by forming V grooves 41 and 42 on the lower surface of the top wall 23. Is. Further, on the lower surface of the top wall 23, downwardly facing inner and outer circular ribs 43 and 44 extending respectively on the inner and outer sides of the V-shaped groove 41 formed with the circular thin portion 31 are arranged so as to face each other across the V-shaped groove 41. In the same manner as this, downward inner U-shaped ribs 45 and 46 extending along the inner and outer sides of the V groove 42 in which the U-shaped thin portion 32 is formed face each other across the V groove 42. Is formed. The inner and outer ribs 43 to 46 facing each other and facing each other are flush with the corresponding side surfaces of the V-shaped grooves 31, 32. On the other hand, on the upper surface of the top wall 23, an upward circular rib 47 extending along the outer side of the circular thin portion 31 and an upward U-shaped rib 48 extending along the outer side of the U-shaped thin portion 32 are formed. Has been formed. The upward circular rib 47 and the U-shaped rib 48 form a step higher than the upper surface of the top wall 23.

Here, the shape of the top wall 23 will be described with reference to FIG. 4 by taking specific dimensions as an example. The average thickness T of the top wall 23 is 0.7 mm and the depth D of the V groove is 0.55 mm. Therefore, the thickness t of the thin portion is 0.15 mm. The height of each rib is 0.3 mm.

If there are no ribs 43 to 48, the ratio of the thickness t of the thin portion / the thickness T of the top wall other than the thin portion is 0.15 / 0.7 = 1 / 4.7. , And ribs, the thickness t of the thin portion / the thickness H + T with the top wall other than the thin portion to which the rib is added is 0.15 / 1. 0 = 1 to 6.7, and the rib increases the thickness ratio by about 45%. The material of the container body 11 is a mixture of high density polyethylene and low density polyethylene. The mixing ratio is 50 to 70 wt% of high-density polyethylene and 50 to 30 wt% of low-density polyethylene. If the high-density polyethylene is less than 50 Wt% and the low-density polyethylene exceeds 50 Wt%, the rigidity of the container body may be difficult. For example, when gripping the container body during manufacturing, the container body may be deformed and may not be gripped well. . If the high-density polyethylene exceeds 70 wt% and the low-density polyethylene is less than 30 wt%, the container body has a difficulty in cutting, and even if an attempt is made to cut a thin portion as described later, the cutting will be smooth along the thin portion. If you try to forcibly cut without advancing, the parts other than the thin part may be cut carelessly.

Although not shown in detail, the bottom lid 12 is made of a laminated body including aluminum foil. The peripheral edge of the bottom lid 12 is heat-sealed to the lower surface of the flange 26.

When the knob ring 33 is pulled up when opening the container, first, a cut is generated at the base of the U-shaped thin portion 32, and the generated cutting progresses from the base of the U-shaped thin portion 32 toward the tip. To do. When the progressing cutting reaches the circular thin portion 31 from one tip of the U-shaped thin portion 32, the cutting proceeds so as to go around the circular thin portion 31, and the circular thin portion 31 is cut. When the whole is cut in one round, an opening corresponding to almost the entire size of the top wall 23 is obtained there.

During the cutting, since the downward and upward ribs 43 to 48 are provided, the cutting does not proceed over the ribs 43 to 48. Further, the cutting is guided by the steps of the upward ribs 47, 48 on the top surface of the top wall 23. Therefore, only the thin-walled portions 31 and 32 are smoothly cut without cutting the thin-walled portions 31 and 32.

Another embodiment is shown in FIGS. In this embodiment, a tongue-shaped thin portion 51 is provided in the central portion of the top wall 23 of the container body 11 by forming a V groove 52 on the lower surface of the top wall 23. A knob ring 53 is provided at the base of the thin portion 51. Further, in accordance with the above-described embodiment, the lower surface of the top wall 23 is provided with the downward inner and outer ribs 54 and 55 extending along both inner and outer sides of the V groove 52. On the other hand, on the upper surface of the top wall 23, an upward rib 56 extending along the inside of the thin portion 51 is provided.

Similar to the above-described embodiment, the thin portion 51 is cut by pulling the knob ring 53, and an opening is obtained inside the thin portion 51.

[0021]

[Effect of the device]

 According to this invention, since the container body is provided with appropriate flexibility and rigidity, the necessary rigidity of the container body is secured without impairing the cuttability of the thin portion, and a catching error of the container body occurs. Can be prevented, and the flow of the production line is not hindered.

[Brief description of drawings]

FIG. 1 is a perspective view including a crushed cross section of a container according to the present invention.

FIG. 2 is a plan view of the container.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG.

5 is an enlarged cross-sectional view taken along line VV of FIG.

FIG. 6 is a plan view corresponding to FIG. 2 showing another embodiment.

FIG. 7 is a cross-sectional view corresponding to FIG. 3 showing another embodiment.

8 is a sectional view taken along line VIII-VIII of FIG.

9 is a sectional view taken along line IX-IX in FIG.

[Explanation of symbols]

 11 Container body 23 Top wall 31, 32 Thin section

Claims (1)

[Scope of utility model registration request] 1. A hermetically sealed container provided with a container body 11 having annular cutting guide thin-walled portions 31 and 32 for forming an opening in an end wall 23, wherein the material of the container body 11 is 50 to 70 Wt%. A sealed container comprising a mixture of high-density polyethylene and low-density polyethylene of 50 to 30 Wt%.