JP4061340B2 - Hollow container with spout and its molding method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The invention of the present application relates to a hollow container that prevents unauthorized opening by adhering a film material that has sealed the opening of the container in an easily peelable manner, and in particular, by providing a spout at the mouth and neck of the container to facilitate pouring. In addition, the present invention relates to a hollow container in which an opening and a cap that protects an easily peelable film are attached to the mouth and neck.
[0002]
[Prior art]
As a typical example of a container having a double sealed structure for preventing unauthorized opening in a hollow container made of a thermoplastic synthetic resin, JP-A-5-305941 and JP-A-7-9751 are conventionally known. Hollow containers provided with spouts as described in 1 are generally known.
These containers contain content liquids such as soy sauce, miso, and edible oil inside, and are completely sealed with a mouth-and-neck member having a sealing portion provided with an opening piece capable of excising the opening of the container. As shown in FIGS. 5 and 6, an outline is formed by forming an extraction cylinder part 32 b at the upper end of the fitting cylinder part 32 a having a fitting groove part at the opening end 31 a of the container body 31. At the same time, a spout 32 formed with a sealing top plate provided with a releasable opening piece 32d is fitted inside the spout cylinder, and the spout 32 is integrally sealed. This is a sealed hollow container having a double lid structure into which the outer lid body 33 is fitted.
[0003]
In the case of the hollow container having the above structure, in order to pour out the content liquid contained in the container, after the outer lid body 33 is opened, a sealed ceiling which is an inner lid provided so as to be excisable. If the unsealed piece 32d provided on the plate portion so as to be excised is pulled out and removed together with the pick piece 32c, the liquid contents cannot be poured out.
Once the opening piece 32d is removed and the content liquid is poured out, it is impossible to replenish the content liquid again and restore it to the original state.
[0004]
And in order to form the hollow container which has the spout which has the above-mentioned structure, the sealing top plate which has a shape that can be fitted to the opening of the container main body and has an opening piece that can be easily removed A hollow container having a spout formed integrally by fitting the spout body into an opening of a container body blow-molded separately from the spout body formed by injection molding. Then, the hollow container must be subjected to a heat treatment operation to impart heat resistance and mechanical strength, which complicates the manufacturing process and is an injection mold for forming such a spout. The mold requires a complex structure and battle accuracy.
Furthermore, the outer lid and the like that are screwed into the spout portion and sealed there is a drawback that the manufacturing cost of the container becomes high due to various factors such as the necessity of separate molding.
[0005]
Therefore, a thermoplastic synthetic resin is used as a hollow container having a double sealed structure that eliminates the above-mentioned various disadvantages and has an inner lid for preventing unauthorized opening that has a simple structure at the opening of the container. Mayonnaise, ketchup, etc. are accommodated in a blow molded hollow container, and the open end of the mouth and neck of the container is thermally welded with an inner lid made of a synthetic resin film or other thin sheet material, adhesive, etc. It is widely known that after sealing with an adhesive means, an outer lid such as a screw lid is screwed or fitted to the mouth-and-neck portion and sealed in a double structure.
[0006]
However, a double-sealed hollow container having the above-described structure takes a little time to remove the inner lid if the adhesive strength of the sealing material is too strong, and such a container is not suitable for sticking mayonnaise or ketchup. It is suitable for those that contain dense contents and squeeze out the contents, but it has a slight viscosity such as shampoo, rinse, liquid detergent or cooking oil. It is not suitable for storing contents that require careful attention to drainage at the opening.
[0007]
No. 6-35156 discloses a sealed hollow container made of a thermoplastic synthetic resin having a structure for preventing tampering that is provided with an inner lid made of a seal material that can be easily peeled off and sealed. The applicant has proposed a container as described.
As shown in FIGS. 7 and 8, the container has a cylindrical inner plug body 42 forming a spout fixed to the mouth neck portion 41a of the container body 41, and the stopper body has a central portion of the top wall. A spout 43 is formed, and a sealing material 44 having a knob 44a is detachably adhered to the top wall to seal the spout 42, and the outer lid 45 is screwed onto the mouth neck portion 41a of the container. These are sealed in a double structure.
[0008]
The container is formed so that the circular base portion of the sealing material 44 is slightly smaller than the top wall portion of the inner plug, and the knob 44a protrudes into the top wall step portion of the inner plug and fits inside the outer lid 45. In this case, the sealing material is easily peeled along the breaking line by pulling the knob when opening.
However, in order to use this container, the outer lid must be twisted and opened. For shampoos and liquid detergents that are frequently used, it is preferable that the lid that seals the opening can be opened and closed easily. It is.
[0009]
[Problems to be solved by the invention]
Compared to conventional containers, it has a simple structure, can prevent unauthorized opening, and contains a viscous liquid with a double lid structure. The lid can be easily opened and closed, and the contents can be easily poured out. In addition, a thermoplastic synthetic resin that can be manufactured at low cost with a container with good liquid drainage at the opening at the time of pouring, and is suitable for the global environment by using as little material as possible. An object is to provide a hollow container made of metal.
[0010]
[Means for Solving the Problems]
By blow-molding a preform formed from a thermoplastic synthetic resin into a predetermined shape into a hollow container, the body and the neck of the hollow container are integrally molded and the body is thinly formed. A notch-shaped spout is formed in the spout portion at the front end of the mouth and neck, and a film-like sealing piece is adhered to the inside of the spout so as to be peelable, and further, the outer peripheral portion of the spout A hollow container with a spout that fits, fixes and seals a cap-like outer lid to form a double sealed state, protects the sealing piece and prevents dust and the like from entering the spout Configure.
[0011]
In addition, a preform made of thermoplastic synthetic resin is blow-molded into a hollow container so that the body and mouth-neck part of the hollow container are integrally formed, and a notch-like pour is poured into the spout part at the tip of the mouth-neck part. A mouth is formed, and an annular projecting step surface is formed on the inner surface of the mouth-and-neck portion so that a film-like sealing piece is releasably adhered and sealed. Further, on the outer surface of the mouth-and-neck portion, Engage the cap-shaped outer lid fitted into the spout to form an engagement projection and neck ring that are sealed and fixed, and protect the sealing piece with the fitted outer lid, and dust and the like in the spout Prevent intrusion.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
A thermoplastic synthetic resin is molded into a preform having a predetermined shape by injection molding, and a spout is formed at the spout portion of the mouth and neck portion, and a step portion for adhering a sealing body to the inner surface of the mouth and neck portion is provided. The preform formed with a protrusion for locking the cap-shaped protective lid on the outer surface of the neck is heated to a temperature suitable for stretch blow molding and then supplied to a blow molding device to perform stretch blow molding. To form into a hollow container.
[0013]
Subsequently, after containing an appropriate amount of the contents in the hollow container, a film-like sealing body is peelably adhered and sealed to the stepped portion of the inner surface of the mouth-and-neck portion, and a cap-like shape is formed at the spout. A sealed lid with a liquid with good pouring properties that prevents unauthorized opening is formed by fitting the protective lid that is attached and locking to the protrusion.
[0014]
【Example】
The sealed hollow container of the present invention will be described below with reference to the drawings on the basis of an optimum embodiment.
As shown in FIG. 1, a polyethylene terephthalate (PET) resin is composed of a spout 3 and a neck ring 4 that form a mouth and neck portion 2 of a container, and a main body portion 5 that forms a body portion of the container. At the same time as the preform 1 is molded, a notched spout 3a is locked to the end of the preform spout 3 and a cap-shaped outer lid is locked to the outer peripheral surface of the neck 2. The locking projection 2a is formed on a preform 1 having a predetermined shape, and a projection wall 2b for adhering a film-like sealing body to the inner peripheral surface of the mouth-and-neck portion 2 is formed.
[0015]
Subsequently, the preform 1 is transported and supplied to a stretch blow molding apparatus, heated to a temperature suitable for blow molding in the heating process section, and then the preform 1 is transported to the blow molding process section. Hold it in a blow mold, blow air under pressure into the preform, perform biaxial stretch blow molding, heat-treat, etc. if necessary, and then cool it down. The container 11 is discharged outside to form a self-supporting hollow container 11 having a bowl shape as shown in FIG.
[0016]
The hollow container 11 formed in this way has a mouth-and-neck portion 12 that is slightly thick and strong, and is subsequently formed to be slightly thin, can be easily pressed and deformed, and has a self-supporting shape. As shown in FIG. 4, a spout 13 a that is formed by cutting a part of a cylindrical wall portion is provided at the spout 13 provided at the tip of the mouth and neck 12. Are formed on the inner peripheral surface of the mouth-and-neck portion 12, and a projecting flat surface portion 12b for releasably adhering the sealing piece 16 is provided. On the outer peripheral surface, an engaging protrusion for locking the outer lid 17 is formed. 12a and the neck ring 14 are formed.
[0017]
Next, when the hollow container 11 is filled with an appropriate amount, the sealing piece 16 made of a film or the like is releasably adhered to the projecting surface inside the mouth-and-neck portion 12 to open the opening. After sealing, a cap-shaped outer lid 17 that is separately molded by injection molding or the like is placed on the outer peripheral surface of the mouth and neck portion 12 so as to completely cover the spout portion 13a formed at the spout. Then, the concave groove formed on the inner surface of the outer lid 17 is engaged with and locked with the locking projection 12a of the mouth-and-neck portion, so that the sealing piece 16 serving as the inner lid provided in the mouth-and-neck portion is protected. At the same time, dust and dust can be prevented from entering the mouth and neck.
And, as shown in the figure, if the knob 16a is provided so as to protrude from the sealing piece 16, it is very easy to open the seal.
[0018]
In addition, since the size of the inner diameter of the mouth and neck is restricted due to the size and design of the container, the protruding flat portion 12b for bonding the peelable sealing piece to the inside of the mouth and neck as described above 3, it is difficult to provide a spout 23 having a large diameter stepped portion near the tip of the mouth and neck portion 22 as shown in FIG. The sealing piece 26 is formed on the outer surface of the mouth / neck portion 22 and the outer lid 27 is formed on the outer surface of the mouth / neck portion 22. By providing the locking protrusion 22a for locking, the hollow container 21 sealed by the double lid can be formed.
[0019]
And, as described above, the spout provided in the cutout shape at the spout of the neck and neck is cut into various shapes such as a semicircular shape, a quadrangular shape, and a trapezoidal shape as shown in FIG. It can be selected freely according to conditions such as the shape and size of the container and the viscosity of the liquid contained in the container.
The number of these spouts is usually sufficient to be provided only at an appropriate part of the mouth-neck, but if it is provided symmetrically at two parts, the content liquid In particular, when opening and closing the spout, it is more convenient when the outer lid is rotated and opened instead of opening and removing the outer lid.
[0020]
【The invention's effect】
As described above, the invention of the present application makes the sealing structure of the inner lid simpler than before and can be easily peeled off, and the outer lid can be easily opened and closed. At the time of pouring, the liquid runs out well.
Furthermore, since the synthetic resin material to be used is small, it can be easily manufactured at low cost, and the sealing piece as the inner lid can be protected and dust and the like can be prevented from entering the spout.
[Brief description of the drawings]
FIG. 1 (a) is a perspective view showing a preform for producing the container of the present invention.
FIG. 1 (b) is a longitudinal sectional view of the preform shown in FIG. 1 (a).
FIG. 2 is a longitudinal sectional view showing a container of the present invention.
FIG. 3 is a longitudinal sectional view showing another example of the container of the present invention.
FIGS. 4A and 4B are perspective views showing various shapes of the spout of the container of the present invention. FIG. 4A is a semicircular shape, FIG. 4B is a square shape, and FIG. 4C is a trapezoidal shape. It is a perspective view.
FIG. 5 is a longitudinal sectional view showing an example of a conventional sealed container.
6 is a perspective view of the sealed container shown in FIG. 5. FIG.
FIG. 7 is a longitudinal sectional view showing a prior example of the present invention.
8 is a perspective view of the sealed container shown in FIG.
[Explanation of symbols]
1. Preform 2. 2. mouth and neck Spout 3a. Spout part 4. 4. Neck ring Container body 11. Hollow container 12. Container neck and neck 12b. Plane portion 13. Container spout 13a. Container spout 14. Container neck ring 15. Container body 16. Sealing piece 17. Outer lid 22. Container neck 22b. Plane portion 23. Outlet

Claims (11)

A double-sealing hollow container formed by blow-molding a thermoplastic synthetic resin, wherein a spout is formed at the spout at the tip of the mouth-neck of the container, and the inside of the mouth-neck A surface for releasably adhering the sealing piece is formed, and an outer peripheral surface of the mouth-and-neck portion is formed with an engaging projection for engaging with the spout and locking the outer lid for sealing. A hollow container with a spout characterized by. 2. The hollow container with a spout according to claim 1, wherein the surface on which the sealing piece is peelably bonded is formed in a planar shape projecting annularly at a position below the bottom of the spout. The hollow container with a spout according to claim 1, wherein the engaging protrusion is formed to project in an annular shape at a position below the bottom of the spout. The said spout is formed in the state which notched a part of cylindrical wall of the spout, The hollow container with a spout as described in the Claims 1 thru | or 3 characterized by the above-mentioned. The said spout is formed in the state which notched a part of symmetrical part of the cylindrical wall of a spout, The hollow container with a spout as described in the Claims 1 thru | or 3 characterized by the above-mentioned. The said spout is a hollow container with a spout according to claim 4 or 5, wherein a part of a cylindrical wall of the spout is cut out in a semicircular shape. The hollow container with a spout according to claim 4 or 5, wherein the spout is formed by cutting out a part of a cylindrical wall of the spout into a square shape. The said spout is a hollow container with a spout according to claim 4 or 5, wherein a part of the cylindrical wall of the spout is cut out in a trapezoidal shape. The hollow container with a spout according to any one of claims 1 to 4, wherein the spout is fitted on a part of a side wall of a cap-like outer lid that fits into the neck of the container and seals the spout. The hollow container with a spout characterized by forming the opening corresponding to. The hollow container with a spout according to claim 9, wherein the outer lid fitted to the mouth / neck portion is rotatably engaged with an engaging projection of the mouth / neck portion. A thermoplastic synthetic resin is injection-molded into a preform having a predetermined shape including a neck portion that forms a spout of a hollow container and a main body portion that forms a body portion, and a notch is formed in the spout. A preform having a protruding surface on the inner side of the mouth and neck and a projection on the outer peripheral surface of the mouth and neck is molded, heated to a temperature suitable for blow molding the preform, A hollow container comprising a neck and neck having a strength obtained by biaxial stretching blow molding using a blow molding apparatus and having a slightly thick wall, followed by a body that is slightly thin and can be deformed by pressure. The spout is formed with a notch-shaped spout, and the inner surface of the mouth-and-neck portion has a projecting flat surface that can be peeled off and the outer peripheral surface has an outer lid. Engagement projection and neck ring to lock Method of forming a pouring spout hollow container, characterized by comprising Te.

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