JPH07291276A - Mouth cap - Google Patents

Abstract

PURPOSE:To simplify the manner in which, relating to a device composed integrally of a pouring body and a lid to be fitted molded in one piece, the lid to be fitted is pushed to after being severed and to keep the cap from loss of tightness with which it is fitted even after repetitive removing and replacing of the cap. CONSTITUTION:A pouring body 2 has on its inner side fastening projections for the fitting in a circular arrangement and in the lower part a rim 24 in the shape of a flange. A lid 3 to be fitted has on its outer side fitting projections 31 which correspond to the fastening projections for the fitting and a roof 32 which is flat and whose size is greater at least in part than that of the upper part of the pouring body 2. The inner part at the circular edge of the upper end of the poring body 2 is joined to the outer circular surface of the lid 3, specifically to the part close to its lower end, with the interposition of a thin-walled part. Nothing obstructs when the lid 3, after being severed, is fitted into the pouring body 2 and the lid can be pushed to easily by exerting force evenly thereon. Since the lid 3 is pushed into the inside of the pouring body 2, they fit together with good tightness; this tightness is not lessened and keeps the device free of leakage even after repetitive removing and replacing of the lid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spout that can be opened and closed by being attached to a carton for storing milk, juice and the like.

[0002]

2. Description of the Related Art Heretofore, as a spout of this kind, there has been known a spout that can be easily produced by injection molding a plastic in one piece (see, for example, Japanese Utility Model Publication No. 3-31709). The spout described in the above publication has a fitting locking projection on the outer side surface, and the fitting locking projection on the inner peripheral surface of the tubular section body and the inner peripheral surface of the tubular section body having a flange-shaped peripheral section on the lower portion. A fitting protrusion corresponding to the portion, the lower end peripheral edge of the fitting lid provided with a projection knob on the upper surface, is continuously provided through a thin portion that can be cut by pulling the projection knob, By pulling the protrusion knob provided on the upper surface, the spout body and the cap portion are separated from each other to form a pouring opening, and the separated cap portion is used as an opening / closing cap.

[0003]

The spout described in the prior art is hygienic and easy to manufacture, and the spout opening can be formed by a simple operation, and the cap is closed if necessary. Although it is excellent in that it can be pushed, the protruding knob protruding on the upper surface of the fitting lid is an obstacle when pushing the cap into the spout body, and also to cover the outer peripheral surface of the spout body with the cap. Therefore, there is a problem that the fitting force becomes weak and liquid leakage occurs while the cap is repeatedly attached and detached.

The present invention has been made in view of the above problems, and an object thereof is a one-piece form in which a spout main body and a fitting lid are integrally molded, and are separated from each other. An object of the present invention is to provide a spout in which the operation of pushing in the fitting lid is simple and the fitting force does not become weak even if the fitting lid is repeatedly attached and detached.

[0005]

In order to achieve the above object, the spout according to the present invention is provided with a circumferential fitting and locking projection on the inner side surface and is provided with a brim-shaped peripheral portion at the lower part. A cylindrical spout body and a circumferential fitting protrusion corresponding to the fitting locking projection on the outer surface, and a flat top surface of which at least a portion is larger than the upper portion of the spout body And a cylindrical fitting lid having a cylindrical shape, and the whole of the spout body is integrally molded of synthetic resin so that the inner peripheral edge of the upper end of the spout body is connected to the outer peripheral surface near the lower end of the fitting lid via a thin portion. It is characterized by being done.

[0006]

The spout of the present invention having the above-mentioned structure is used by being attached to the mounting hole provided in the carton, and when pouring out the content liquid, the outer peripheral portion of the top surface of the fitting lid is fingertipped. By pulling up, the thin portion between the spout body and the fitting lid is broken and opened. Also, by placing the separated fitting lid on the inside of the spout body and pushing it in with your fingertips, the lid is removed with the fitting projection of the fitting lid engaging the fitting locking projection of the spout body. It

[0007]

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

FIG. 1 is a perspective view showing an embodiment of the spout according to the present invention, FIG. 2 is a half sectional view taken along line XX in FIG. 1, and FIG.
[Fig. 4] is a half sectional view showing a state in which the separated fitting lid is fitted into the spout body.

The spout 1 shown is formed by injection molding a synthetic resin such as polyethylene and integrally forming a spout body 2 in the lower part and a fitting lid 3 in the upper part. Of these, the spout body 2 has a cylindrical fitting and locking projection 21 having an upwardly tapered surface 21a on the inner side of the upper portion, and has a tubular shape having four temporary fixing projections 22 on the side surface. Cage, this temporary fixing projection 22
A brim-shaped peripheral portion 24 is provided on the lower side via a step portion 23. On the other hand, the fitting lid 3 has a tapered surface 3 directed downward.
It has a cylindrical shape having a circumferential fitting protrusion 31 having 1a on the outer side of the lower part, and a circular top surface 32 of a flat size larger than the upper part of the spout body 2 is provided on the upper part thereof, Both sides of the top surface 32 are shaped so as to protrude by the arcuate convex portions 32a. The spout body 2 and the fitting lid 3 are connected by a thin portion 4 that connects the inner peripheral edge of the upper end of the spout body 2 and the middle of the tapered surface 31 of the fitting lid 3.

To attach the spout 1 to a carton, the spout 1 is inserted into a mounting hole provided in the carton, and the periphery of the mounting hole is sandwiched between the flange-shaped peripheral portion 24 and the temporary fixing projection 22. By means of ultrasonic welding or the like, the brim-shaped peripheral portion 24
Is fixed to the periphery of the mounting hole. To open the spout 1 attached to the carton, the protrusion 3 on the top surface 32 of the fitting lid 3 is opened.
When 2a is pulled up with a fingertip, the thin portion 4 is torn, and the fitting lid 3 is separated from the spout body 2 to form an opening.
After pouring out the content liquid, the separated fitting lid 3 is used as a cap, and when this is applied to the inside of the spout main body 2 and pushed in with a fingertip, the fitting protrusion 31 of the fitting lid 3 is released. Due to the elasticity of the synthetic resin, the fitting lid 3 is pushed over the fitting locking projection 21 of the spout body 2, and the fitting projection 3 is engaged with the fitting locking projection 21 as shown in FIG. Due to spout body 2
Is blocked. In this way, when the fitting lid 3 is pushed in with a fingertip, the top surface 32 of the fitting lid 3 is flat and there is no obstacle so that it can be pushed in easily. Further, since the tubular portion of the fitting lid 3 is inserted into the tubular portion of the spout main body 2 and the lid is closed, the fitting force between the two is strong.

[0011]

As described above, the spout of the present invention is manufactured by integrally molding the spout body and the fitting lid, and the separated fitting lid is fitted into the spout body. Then, when the lid is closed, the entire top surface of the fitting lid is flat and there is no obstruction, so that the fitting lid can be easily pushed by applying an even force. Also, because the fitting lid is pushed inside the spout body to cover it, a strong fitting force is obtained, and even if the fitting lid is repeatedly returned and attached, the fitting force does not become weak and liquid leakage is prevented. can do.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a spout according to the present invention.

FIG. 2 is a half sectional view taken along line XX of FIG.

FIG. 3 is a half cross-sectional view showing a state in which the separated fitting lid is fitted into the spout body.

[Explanation of symbols]

 1 spout 2 spout main body 21 mating locking projection 24 brim peripheral edge 3 mating lid 31 mating projection 32 top surface 4 thin portion

Claims (1)

[Claims] 1. A cylindrical spout body having a circumferential fitting locking projection on the inner surface thereof, and a flange-shaped peripheral portion on the lower portion, and the fitting locking projection on the outer surface. An upper end of the spout body, which is provided with a corresponding circumferential fitting projection, and which is flat and has a cylindrical fitting lid at least a part of which has a top surface larger than the top of the spout body. The spout is integrally formed of synthetic resin so that the inner peripheral edge is continuously provided to the outer peripheral surface near the lower end of the fitting lid via a thin portion.