JPH0737963U - Pouring cap - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to supplement the decrease in the sealing property and the assembling strength due to the heat-shrinking deformation of the pouring cap so that the sealing property and the assembling strength are not deteriorated by heating. [Structure] A comparatively soft synthetic resin assembly cylinder 2 in which a spout cylinder 7 is erected on the upper end of an inner cylinder 3 that is tightly fitted in a bottle mouth cylinder 16, and a pull ring on the upper surface of a bottom wall 9. A relatively soft synthetic resin cutout body 8 provided with an inner cylinder 3 of the assembly cylinder body 2
A comparatively hard synthetic resin coupling cylinder 11 whose outer peripheral surface abuts on the inner peripheral surface and whose lower end inner peripheral surface abuts on the outer peripheral surface of the bottom wall 9 of the cutout body 8; As insert material,
The assembly cylindrical body 2 and the cutout body 8 are configured by injection molding.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pouring cap that is tightly assembled to a bottle mouth barrel that contains liquid and that is partially opened to achieve opening.

[0002]

[Prior art]

 Conventionally, bottles of soy sauce, edible oil, sauce, etc., which use the liquid in the bottle for dispensing, use a synthetic resin spout cap provided with a spout cylinder, and fill the bottle with the liquid. It is installed in the mouth and sealed.

This spout cap is configured by forming a cutting wall having a pull ring through a breaking groove on a part of the bottom wall of a bottomed cylindrical spout tube, and pulling up the pull ring to form the cutting wall. By removing the fracture along the fracture groove, the bottle can be opened and the pouring port can be formed.

This type of pouring cap is relatively soft such as low-density polyethylene resin because of its good moldability, excellent resistance to contents, good sealing performance, and easy breakability. Various synthetic resin materials are used.

[0005]

[Problems to be solved by the device]

 However, the spout cap molded with a relatively soft synthetic resin such as low-density polyethylene resin has low heat resistance. Therefore, for example, the content liquid is heated and filled at 85 to 90 ° and sealed with this spout cap. In this case, there is a problem in that the pouring cap is heated by the content liquid before cooling to be thermally contracted and deformed, the sealing property thereof is deteriorated, and the assembling strength with respect to the bottle is deteriorated.

Further, since the whole is integrally molded, there is a problem that the shape thereof is restricted in correspondence with the die cutting from the molding die, and the desired shape cannot be selected.

Therefore, the present invention was devised to solve the above-mentioned problems in the prior art. Therefore, it is technically possible to supplement the decrease in the sealing property and the assembling strength due to the heat shrinkage deformation of the pouring cap. The object is to obtain a pouring cap that does not reduce the sealing property and the assembling strength due to heating.

[0008]

[Means for Solving the Problems]

 The means of the present invention for solving the above technical problem has a comparatively soft synthetic resin assembly cylinder in which a spout cylinder is erected on the upper end of an inner cylinder that is tightly fitted in the mouth cylinder of the bottle. That is, it has a relatively soft cutout made of synthetic resin with a pull ring on the upper surface of the bottom wall, and the outer peripheral surface abuts the inner peripheral surface of the inner cylinder of the assembly cylinder, and the inner peripheral surface at the lower end is cutout. The present invention is to have a relatively hard synthetic resin connecting cylinder that abuts the outer peripheral surface of the bottom wall, and to perform injection molding of the assembling cylinder and the cutout using the connecting cylinder as an insert material.

[0009]

[Action]

 The assembling of the spout cap to the bottle mouthpiece is accomplished by forcibly pushing the inner cylinder into the mouthpiece from above. In this assembled state, the outer peripheral surface of the comparatively hard synthetic resin connecting cylinder body is in contact with the inner peripheral surface of the inner cylinder, so that the outer peripheral surface of the inner cylinder is the inner peripheral surface of the mouth cylinder. It will be crimped.

Therefore, even if shrinkage deformation occurs in the spout cap due to heating, heat shrinkage deformation does not occur in the comparatively hard synthetic resin-made connecting cylinder body, and therefore the outer cylinder surface of the inner cylinder and Since the crimping with the inner surface of the mouth tube is still held, the sealing performance of the bottle mouth tube by the spout cap is not impaired.

Further, since the assembling cylinder body, the cutout body, and the connecting cylinder body are molded as separate objects, there is no large restriction on the shape for die-cutting in each molding. Therefore, it is possible to project a pouring tube, which plays an important function such as improving the liquid out when pouring out the liquid, at the upper end of the inner tube.

Incidentally, the opening of the bottle body is accomplished by pulling up the pull ring of the excised body with a fingertip and removing the bottom wall in the conventional manner. The connection cylinder and the cutout body are integrated by injection-molding the cutout body using the connection cylinder body as an insert material, with the inner peripheral surface of the lower end of the connection cylinder contacting the outer peripheral surface of the bottom wall of the cutout body. However, since the connecting cylinder is made of a relatively hard synthetic resin and the cutout is made of a relatively soft synthetic resin, the lower end inner peripheral surface of the connecting cylinder and the cutout that abut each other are cut. There is no compatibility with the outer peripheral surface of the bottom wall of the cutting body.Therefore, if the pull ring of the cutting body is pulled up with a fingertip, the inner peripheral surface of the lower end of the connecting cylinder and the outer peripheral surface of the bottom wall of the cutting body are easily separated and separated. The body can be removed to achieve opening.

[0013]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. At the upper edge of the outer peripheral surface of the mouth cylinder 16 of the bottle body 15 formed of glass, synthetic resin, or the like, the locking projection 17 is formed so that the wall thickness of the opening end edge of the mouth cylinder 16 is thickened outward. Is provided in a circumferential ridge shape, and the spout cap 1 according to the present invention is assembled in a mouthpiece 16 around which the locking ridge 17 is circumferentially fitted.

The assembling cylinder 2 is injection-molded with a relatively soft synthetic resin material such as low-density polyethylene resin, and has a cylindrical outer cylinder 4 that is fitted onto the mouth cylinder 13 provided with the locking projections 17. An inner cylinder 3 which is tightly fitted into the mouth cylinder 16 of the bottle 15 is hung and connected to the upper end of the inner flange-shaped top plate 5, and a pouring cylinder 7 is hung and connected to the upper end of the inner cylinder 3. Set up and configured.

The spout cylinder 7 is a tapered cylindrical wall that expands upward in a trumpet shape, and the upper end thereof has a shape that is turned outward and downward so that liquid drainage can be reliably achieved.

Further, the lower end portion of the pouring tube 7 slightly projects inward, and therefore, a step portion 6 is provided between the lower end of the pouring tube 7 projecting inward and the inner peripheral surface of the inner tube 3. It is formed.

The inner tube 3 has a diameter slightly larger than the inner diameter of the mouth tube 16 so that the inner tube 3 can be fitted into the mouth tube 16 by elastically contracting and deforming at the time of assembling, and in consideration of the heat shrinkage amount of this portion. Is formed in

Similarly, the cutout body 8 injection-molded with a relatively soft synthetic resin material has a structure in which a pull ring 10 is integrally erected on the upper surface of the bottom wall 9.

Next, the connecting cylinder 11 that connects the assembling cylinder 2 and the excision body 8 is made of a relatively hard synthetic resin material, and the connecting cylinder 11 is used as an insert material to remove the assembling cylinder 2 and the excision body 8. The body 8 and the body 8 are integrated by injection molding, and the outer wall 12 having a cylindrical shape and the inner wall 13 having a cylindrical shape are connected at the upper end, and an inner flange 15 is provided around the lower end of the inner wall 13. .

When the connecting cylinder 11 is integrated with the assembling cylinder 2 and the excision body 8, the outer peripheral surface of the outer wall 12 abuts and adheres to the inner peripheral surface of the inner cylinder 3 to form the outer wall 12 and the inner wall. The upper end connecting portion of 13 abuts and adheres to the step portion 6 from below, and the inner peripheral end surface of the inner collar 15 provided around the lower end of the inner wall 13 abuts the outer peripheral end surface of the bottom wall 9 of the cutout body 8. Are glued together.

The inner peripheral surface of the inner wall 13 is a tapered cylindrical wall which is continuous with the inner peripheral surface of the spouting cylinder 7 and spreads upward in a trumpet shape.

With the above-described configuration, the contraction deformation of the connecting cylinder 11 does not occur even when the spout cap 1 is heated by heating and filling the liquid in the bottle 15, so that the inner cylinder 3 The pressure contact between the outer peripheral surface and the inner peripheral surface of the mouth tube 16 is maintained, and the sealing performance of the mouth tube 16 of the bottle body 15 by the pouring cap 1 is ensured.

Since the assembling cylinder body 2, the cutout body 8 and the connecting cylinder body 11 are separately molded, there is no restriction on die cutting at the time of molding, and a free shape can be selected to some extent. .

In FIG. 1, reference numeral 19 denotes a capped cylindrical outer cap, and an inner peripheral surface of a peripheral wall of the cap is a thread 20 which is screwed into a thread 18 provided on an outer peripheral surface of the bottle mouth tube 16. The outer cap 19 is detachably attached to the mouth tube 16 by screwing so as to cover the spout cap 1.

The outer cap 19 ensures a certain degree of hermetic sealing of the bottle body 15 after the cutting body 8 is cut off. By doing so, this sealing property can be secured.

[0026]

[Effect of device]

 According to the pouring cap of the present invention, when assembled to the bottle mouth tube, the inner cylinder inner peripheral surface of the assembly cylinder formed of a relatively soft synthetic resin has a relatively hard composite structure. Since the connecting cylinder made of resin is placed in contact, the connecting cylinder will not be deformed even if the spout cap is deformed due to heat contraction, etc. Therefore, the outer peripheral surface of the inner cylinder is always open. The pressure tightness is applied to the inner peripheral surface of the cylinder, so that the sealing performance is not impaired.

[Brief description of drawings]

FIG. 1 shows an embodiment of a pouring cap according to the present invention,
Overall vertical sectional view.

FIG. 2 is an enlarged view of a main part of FIG.

[Explanation of symbols]

 1; Pour-out cap 2; Assembly cylinder 3; Inner cylinder 4; Outer cylinder 5; Top plate 6; Step part 7; Pour-out cylinder 8; Cutout body 9; Bottom wall 10; Pull ring 11; Connection cylinder 12; Outer wall 13; Inner wall 14; Inner collar 15; Bottle body 16; Mouth tube 17; Locking ridge 18; Thread 19; Outer cap 20; Thread

Claims (1)

[Scope of utility model registration request] 1. A relatively soft synthetic resin assembly in which a spouting cylinder (7) is erected on the upper end of an inner cylinder (3) that is tightly fitted in the mouth cylinder (16) of the bottle body (15). Cylinder (2) and cutout body (8) made of relatively soft synthetic resin with pull ring (10) provided on the upper surface of bottom wall (9)
The outer peripheral surface abuts on the inner peripheral surface of the inner cylinder (3) of the assembled cylindrical body (2), and the lower inner peripheral surface abuts on the outer peripheral surface of the bottom wall (9) of the cutout body (8). A connecting cylinder (11) made of a hard synthetic resin, and using the connecting cylinder (11) as an insert material, the assembly cylinder (2) and the cutout body (8) are injection molded. Consisting of a pouring cap.