JPH04106254U - Synthetic resin lid stopper - Google Patents

Abstract

(57) [Summary] [Purpose] A synthetic resin cap is provided on the inner and outer surfaces of the container mouth and neck so that the inner and outer peripheral walls hanging down from the outer periphery of the top wall can be fitted. In order to prevent the high-pressure air compressed between the top wall portion and the upper end of the mouth and neck from coming off, an air release groove is provided on the engagement protrusion on the inner periphery of the lower end of the outer peripheral wall to prevent the lid from coming off after forming the lid. This prevents the outer surface of the outer peripheral wall from becoming distorted due to thermal contraction during cooling. [Structure] A large number of vertical grooves 6 for air venting are formed on the inner circumferential surface of the engagement protrusion 5 on the inner periphery of the lower end of the outer circumferential wall 4 of the lid stopper 1 at small gaps.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This proposal relates to a synthetic resin lid that is fitted onto the upper end of the mouth and neck of the container body.

0002

[Conventional technology]

Both the inner and outer circumferential walls are vertically fitted from the outer circumference of the top wall to the upper outer surface of the container mouth and neck in an airtight manner. and on the inner surface of the lower end of the outer peripheral wall, the lower surface of the protrusion is provided around the outer surface of the upper end of the mouth and neck. A synthetic resin lid stopper is known that has a circumferential engaging protrusion that engages with the lid.

0003

[Problem that the idea aims to solve]

For example, when the conventional lid plug is fitted into the mouth and neck of a container filled with high-temperature liquid, The lid sometimes came off some time after it was fitted. The cause is the container body, mouth and neck. When fitting both the inner and outer circumferential walls of the cap to the inner and outer surfaces of the The top wall of the cap between the upper ends of both the inner and outer circumferential walls and the top of the neck of the container body are At the same time, the air above the liquid level inside the container body is compressed between Expands due to body temperature increase, and in this way the above compressed air and the expanded air inside the container body This is thought to be due to both pushing up the lid.

0004 In order to eliminate such defects, it is necessary to provide an engaging protrusion around the lower end of the inner surface of the outer peripheral wall. It is sufficient to provide notches for air relief in several places in the strip, but if you do this, the The lower end portion of the outer peripheral wall that has a notch is thinner than the lower end portion of the outer peripheral wall that does not have a notch. Therefore, when the lid is integrally molded with synthetic resin material, the thick part and the Since the heat shrinkage rate of the thin part is different from that of the thin part when the cap is cooled, it is necessary to form the outer surface of the outer peripheral wall into a perfect circle. Therefore, the appearance of the cap was impaired.

[0005] This proposal eliminates the above drawbacks, and provides air relief on the engaging protrusion on the inner surface of the lower end of the outer peripheral wall. In addition, a cutout was provided for the purpose of preventing the external shape of the outer peripheral wall from becoming distorted. It was established.

[0006]

[Means to solve the problem]

Both inner and outer circumferential walls 3 are airtightly fitted from the outer circumference of the top wall 2 to the upper inner and outer surfaces of the mouth and neck of the container body. . In a lid stopper made of synthetic resin, which is provided with an engaging protrusion 5 that engages with the lower surface of the protrusion 22 , A large number of vertical grooves 6 for air venting are bored on the entire inner peripheral surface of the engaging protrusion 5 with small gaps between them. did.

[0007]

[Effect]

As shown in FIG. 3, both the inner and outer circumferential walls 3 and 4 of the lid stopper 1 are fitted to the upper end of the container mouth neck 21. When putting the clothes on, the air between the top wall part between the upper ends of both the inner and outer circumferential walls and the upper end of the mouth and neck is as shown in Figure 2. As shown in FIG. It is discharged through the vertical groove 6. In addition, the vertical groove is small on the entire inner circumferential surface of the engaging protrusion 5. Since a large number of holes are made with gaps between them, heat dissipation at the bottom of the outer peripheral wall after integrally molding the synthetic resin lid and plug is improved. The shrinkage will be done equally on each part.

[0008]

【Example】

1 is a lid stopper made of synthetic resin according to the present invention, which has a top wall that closes the upper end surface of the container mouth neck 21; Both inner and outer circumferential walls 3 and 4 are hung from the outer circumference of 2 to be airtightly fitted to the upper inner and outer surfaces of the mouth and neck. Set up On the inner surface of the lower end of the outer peripheral wall 4, a protrusion 22 provided around the outer surface of the upper end of the mouth and neck is connected to the lower surface. An engaging protrusion 5 for engagement is provided around the periphery. In addition, the entire inner peripheral surface of the engaging protrusion 5 is provided with an air vent. A large number of vertical grooves 6 are bored with small gaps in between.

[0009] The lid in the illustrated example has a so-called pull ring 7, and by pulling up the ring, the lid can be thinned. The removal plate part 9 formed at the center of the top wall 2 by the 8 circumference of the meat breaking line is inserted through the connecting piece 10. It is designed to be pulled up and opened, and 11 is a pouring tube.

0010

[Effect of the idea]

This proposal has the above-mentioned configuration, and the inner circumferential surface of the engaging protrusion 5 on the inner surface of the lower end of the outer circumferential wall 4 of the lid plug. Since a vertical groove 6 for air venting is provided in the hole, when the lid plug is fitted to the mouth and neck of the container body, , the compressed high-pressure air remains between the top wall part of the upper end of the inner and outer peripheral walls and the upper end of the mouth and neck. Therefore, as mentioned above, when the cap is inserted into the mouth and neck, the inside of the cap can be It will not come off due to the expanded air and the compressed air, and the vertically divided Since a large number of grooves 6 are formed on the entire inner circumferential surface of the engaging protrusion 5 with small gaps between them, the vertically divided As in the case where grooves are provided in several places, the wall thickness of the lower end of the outer peripheral wall may be Since the wall is thin, the outer surface of the outer circumferential wall will not be distorted during cooling of the cap.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of the lid according to the present invention.

FIG. 2 is a bottom view of the lid.

FIG. 3 shows a state in which the lid plug is fitted to the mouth and neck of the container body.
FIG. 3 is an enlarged cross-sectional view of main parts.

[Explanation of symbols]

1 Lid stopper 4 Outer wall 5 Engagement protrusion 6 Vertical groove

Claims (1)

[Scope of utility model registration request] 1. Both inner and outer circumferential walls 3 and 4 are provided vertically to fit airtightly from the outer circumference of the top wall 2 to the upper inner and outer surfaces of the mouth neck of the container body, and the above-mentioned opening is provided on the inner surface of the lower end of the outer circumferential wall 4. In a lid stopper made of synthetic resin, which is provided with an engaging protrusion 5 that engages with the lower surface of the protrusion 22 provided around the outer surface of the upper end of the neck, the entire inner peripheral surface of the engagement protrusion 5 is used for air venting. A lid stopper made of synthetic resin, characterized in that a large number of longitudinal grooves 6 are formed with small gaps between them.