JP5749900B2 - Tube container fitted with an internal stopper with valve - Google Patents

Description

  The present invention relates to a tube container fitted with an inner plug body with a valve, and more specifically, fitted with an inner plug body with a valve that is simultaneously molded in the same mold in a state where the valve body and the inner plug body are separated. Related to the tube container.

  Conventionally, an extruded tube container has an air bag phenomenon in which air is sucked in by the restoring force of the container body portion. For this reason, the sucked air may cause alteration of the contents or the contents may solidify. Therefore, a tube container with a backflow prevention valve is used in which a backflow prevention valve is fitted to the mouth of the container to prevent air back. A conventional tube container with a check valve has been manufactured by separately forming a valve body and an inner plug body and assembling them later. When the body of the tube container fitted with the backflow prevention valve is pressed, the contents are pushed out of the body of the tube container, and the valve body is pushed up and discharged to the outside. When the pressure on the body is stopped, the restoring force of the container body causes the contents in the backflow prevention valve to return to the container and try to suck in air, but at the same time the valve body is also pulled back. Close the hole. This prevents air bag back into the container.

  Such conventional backflow prevention valves include those shown in FIGS. In FIG. 6, 56 is a sphere and 53 is an inner plug. The inner plug body 53 is fitted into the mouth portion 52 of the tube container 51. The tube container 51 is a single layer, a multilayer tube or a laminate tube. A passage 54 is formed above the inner plug body 53, and a valve body storage portion 55 having an enlarged inner diameter is formed below the passage 54. The inner diameter of the valve body storage 55 is configured to be slightly larger than the diameter of the sphere 56. A valve stop portion 57 is formed on the top surface of the valve body storage portion 55 so as to divide the entire circumference into 3 to 4 parts, and when the sphere 56 rises, the sphere 56 closes the passage 54 and the contents An object is prevented from blocking the passage 54. On the other hand, below the valve body storage portion 55, a projection portion 58 that supports the sphere 56 and plays a role of a valve function is formed by interaction with the sphere 56. The dimension between the protrusions 58 is configured to be slightly smaller than the sphere 56, and the sphere 56 protrudes from the inner plug lower part 59 so that it can be forcibly inserted. The valve function is exhibited by the engagement / disengagement of the sphere 56 and the protrusion 58. Patent Literature 1 is a literature of a tube container fitted with a valve-attached inner plug body with such a conventional check valve.

Patent No. 4434380

However, the spherical body 56 and the inner plug body 53 of the tube container fitted with the conventional inner plug body with a valve are formed in separate manufacturing processes as shown in FIG. It is press-fitted into the valve body storage part 55 from between the parts 58. Therefore, a press-fitting work process is necessary, and there are disadvantages that the number of manufacturing processes of the valved inner plug increases and the manufacturing cost increases.
The present invention has been made paying attention to such problems, and has a small number of manufacturing steps, low manufacturing costs, and reliably exerts a valve function effect on contents with low viscosity. It aims at providing the tube container which fitted the inside stopper with a valve.

In order to solve this problem, the solution means of the invention according to claim 1 has a valve body composed of a cup part and a leg part, and a valve seat that exerts a valve function when the outer periphery of the cup part comes into line contact. An inner plug body with a valve comprising an inner plug body, and a tube container into which the inner plug body with the valve is fitted to the mouth, the inner plug body including a side peripheral wall, and the side peripheral wall The valve seat extends inward from the middle of the inner peripheral surface of the inner surface, and a hole is formed near the center of the valve seat, and the cup portion extends outward from the bottom and the periphery of the bottom. It consists of a peripheral wall that expands and extends upward, and the leg portion extends downward from the vicinity of the lower surface of the peripheral edge of the bottom portion and expands outward. cage, and movably holding the valve locus valve body up and down, a tube container, the Japanese It is set to.

Solution of the invention of claim 2, wherein the hinge cap to the male screw portion of the mouth of the tubular container is a tube container is screwed, is characterized by.

According to a third aspect of the present invention, there is provided a tube container in which the leg portion includes a straight portion extending straight downward and a retaining portion provided at a tip of the straight portion and extending outward. It is characterized by that.

The solving means of the invention described in claim 4 is characterized in that a bottle container is used instead of the tube container .

For example, such a method of manufacturing an internal plug body with a valve includes: a valve body composed of a cup part and a leg part; (A) The valve body is formed by flowing resin into a space surrounded by at least the upper mold pin, the upper sleeve pin, the lower mold pin, and the lower sleeve pin, and (b) the inner plug body is at least a cavity. An upper mold pin and an upper sleeve pin are arranged at the center of the core, and a lower mold pin and a lower sleeve pin are arranged at the center of the core pin, and resin is placed in a space surrounded by the cavity, the upper sleeve pin, and the core pin and the lower sleeve pin. flows to be molded, is characterized by being co-molded in the same mold in the state (c) the valve body and Chusentai are separated.

  According to the present invention, since the tube container is formed with the same plug with the valve body and the inner plug body separated from each other and is fitted with the inner plug body with the valve, the number of molding steps is small and the manufacturing cost is reduced. Has the effect of being inexpensive. In addition, since the valve function is reliably exerted, even if the content has a low viscosity, it has the effect of reliably preventing the content from being altered by air.

The front sectional view which shows Example 1 which shows the state where the valve function is exhibited, when the inside plug with valve concerning the present invention is fitted in the mouth of a tube container. The front sectional view showing Example 1 which shows the state where the valve function is canceled when fitting the stopper with valve concerning the present invention to the mouth of the tube container. Front sectional drawing which shows Example 2 which screwed the hinge cap in the tube container which fitted the internal stopper with a valve which concerns on this invention. Front sectional drawing which shows Example 3 which screwed the hinge cap in the tube container which fitted the inside plug body which concerns on this invention. FIG. 3 is a front cross-sectional view showing a molding die for the valve-attached inner plug body in the method for manufacturing the valve-attached inner plug body according to the present invention. Front sectional drawing of the tube container which fitted the conventional stopper with valve to the opening part of the tube container. Sectional drawing which shows the state which press-fits the spherical body in the inside plug body in the tube container which fitted the conventional inside plug body with a valve to the opening part of the tube container.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  FIGS. 1 and 2 are cross-sectional views showing Example 1 showing a state in which the valved inner plug body 3 according to the present invention is fitted to the mouth portion 2 of the tube container 1. A feature of the valve-attached inner plug body 3 according to the present invention is that the inner plug body 3 and the valve body 4 are separated from each other and are simultaneously molded by the same mold. The tube container 1 is a single layer tube, a multilayer tube, or a laminate tube. The valve body 4 is composed of an upper cup portion 6 and a lower leg portion 7, and the lower leg portion 7 is divided into 3 to 4 in the circumferential direction, and the contents are formed from a groove 8 formed in a gap between the divisions. Moves upward. And since the retaining part 7a of the cup part 6 and the leg part 7 engages with the valve seat 5 of the inner plug body 3 as a retaining mechanism, the valve body 4 does not come off from the valve seat 5 of the inner plug body 3.

FIG. 1 shows that after the contents are pushed out of the tube container 1, the inside of the tube container 1 is decompressed and the valve body 4 is lowered, so that the cup portion 6 of the valve body 4 becomes the valve seat of the inner plug body 3. 5 is a drawing showing a state in which the valve function is exhibited and the air bag is prevented from being fitted. The valve seat 5 is integrally formed with the inner plug body 3, and a hole is formed in a flat portion of the valve seat 5 having a certain thickness so that the valve body 4 can be held movably. That is, when the cup portion 6 of the valve body 4 is in line contact with the hole upper corner portion 5a formed in the flat portion of the valve seat 5, the valve function is exhibited. Since the cup portion 6 of the valve body 4 and the valve seat 5 of the inner plug body 3 are engaged not by surface contact but by line contact, the adhesion is improved and the air bag effect is reliably exhibited even with low-viscosity contents. . Therefore, the present invention can be effectively applied to a tube container fitted with a valved inner stopper that does not require a closing membrane. 2 shows that the content is pushed out of the tube container 1 and the valve body 4 moves upward so that the retaining portion 7a of the leg portion 7 of the valve body 4 is brought into contact with the valve seat 5 of the inner plug body 3. It is sectional drawing which fitted and the valve function was cancelled | released. In this case, the content moves upward through the groove 8 of the leg 7 and is discharged out of the tube container 1.

FIG. 5 is a cross-sectional view illustrating a state in which the valved inner plug body 3 according to the first embodiment is molded with a mold. FIG. 5 shows that the mold 3 is formed by injecting resin into the space surrounded by the cavity 11, the upper sleeve pin 12, the auxiliary pin 15, the core pin 13, the lower sleeve pin 14, and the slide core 18. 16 is a view showing a state in which a valve body 4 is molded by injecting resin from another route into a space surrounded by 16 and an upper sleeve pin 12 and a lower mold pin 17 and a lower sleeve pin 14. In this manufacturing method, simultaneous molding with the same mold is possible with the inner plug body 3 and the valve body 4 separated. In FIG. 5, the auxiliary pin 15 is provided to improve the moldability of the inner plug body 3, but the auxiliary sleeve 15 is not provided and the upper sleeve pin 12 and the auxiliary pin 15 are integrated. It may be an embodiment of a mold provided with.

FIG. 3 shows a second embodiment. In the second embodiment, the inner plug body 23 with the valve that is simultaneously molded by the same mold with the inner plug body 23 and the valve body 24 separated from each other is fitted to the mouth portion 22 of the tube container 21 and the hinge. This is an embodiment in which the cap 25 is screwed into the male screw portion 22 a of the mouth portion 22. As for the hinge cap 25, the flange part 27 suspended from the top wall 26 of the cap base part 35 is fitted to the collar part 23a of the valve-attached plug body 23 from above. Further, a spout 28 is erected above the flange portion 27 depending from the top wall 26, and an outer cylinder 29 is formed on the outer peripheral edge of the top wall 26. The outer cylinder 29 is a shoulder portion of the tube container 21. 30 hangs down. A fitting cylinder 32 is suspended from the inner wall of the top surface of the lid 31 and is detachably fitted to the spout 28. A front wall 33 is suspended from the outer periphery of the lid 31 and a rear wall 34 is formed later. The rear wall 34 and the cap base 35 are connected by a hinge 36 so that the lid 31 can be freely opened and closed. Has been. The female screw part 35 a of the cap base part 35 is screwed into the male screw part 22 a of the mouth part 22 of the tube container 21.

FIG. 4 shows a third embodiment of the present invention, and is an embodiment in which only the inner plug body 23 is molded with a mold without resin flowing into the valve body portion of the mold at the time of molding. The inner plug body 23 is fitted into the mouth portion 22 of the tube container 21, and the flange portion 27 suspended from the top wall 26 formed on the base portion 35 of the hinge cap 25 is fitted to the flange portion 23 a of the inner plug body 23 from above. It is a thing. Thereby, the tube container 21 and the hinge cap 25 can be closely fitted through the inner plug body 23, and the inner plug body 23 exhibits a function of adjusting the inner diameter of the tube container 21.

  The tube container in which the inner plug body with valve, which is simultaneously molded with the same mold in the state where the inner plug body and the valve body according to the present invention are separated, is fitted to the mouth portion of the tube container has few assembly steps. In addition, since the manufacturing cost is low and the valve function is high, it can be widely used as a tube container for filling cosmetics, pharmaceuticals, foods, etc. as contents.

1,21 Tube container 2,22 Mouth part 3,23 Middle plug body 4,24 Valve body 5 Valve seat 6 Cup part 7 Leg part 7a Detachment part 11 Cavity 12 Upper sleeve pin 13 Core pin 14 Lower sleeve pin 16 Upper mold pin 17 Lower mold pin 22a Male thread portion 23a Hedge portion 25 Hinge cap 27 Flange portion 35 Base portion of hinge cap

Claims (4)

A valve body composed of a cup part and a leg part, and an inner plug body with a valve comprising an inner plug body having a valve seat in which the outer periphery of the cup part is in line contact and exhibits a valve function;
A tube container fitted with a mouth portion of the valved inner plug body,
The inner plug includes a side peripheral wall, the valve seat extends inward from the middle of the inner peripheral surface of the side peripheral wall, and a hole is formed near the center of the valve seat,
The cup part is composed of a bottom part and a peripheral wall extending outwardly from the vicinity of the periphery of the bottom part and extending upward,
The leg portion extends downward from the vicinity of the lower surface of the peripheral edge of the bottom portion, and extends outward.
The leg is engaged with the valve seat to prevent it from coming off,
Are movably held the valve locus valve body up and down,
Tube container fitted with an internal stopper with valve.
The tube container mouth according to claim 1 Benzuke the tube container fitted plug body according to the hinge cap to the externally threaded portion, characterized in that the screwed. The valve-attached device according to claim 1 , wherein the leg portion includes a straight portion that extends straight downward and a retaining portion that is provided at a tip of the straight portion and extends outward . Tube container fitted with a stopper. Bottle container according to any one of claims 1, 2 or 3, characterized in that the bottle in place of the tube container.

Images