JPH0335750Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention stores a fluid such as a liquid or a fluid paste in a container, and pours this fluid out of the container using a fluid dispensing device. The present invention relates to a fluid dispensing container for dispensing fluid.

[Conventional technology]

For containers using a fluid dispensing device, the fluid dispensing device must be provided with ventilation holes that communicate with the inside and outside of the container to prevent negative pressure inside the container due to dispensing the fluid. is normal.

Although this vent hole is generally equipped with a check valve to prevent the fluid from flowing out, there is a risk that the container may leak if the container falls over, and that such leakage If air is directly introduced into the container through the pores, when the proportion of air in the container becomes large, if the fluid dispensing device is a pump type, the air in the container will interfere with sucking up the fluid. This makes it difficult to pour out the fluid.

Therefore, in the fluid dispensing container described in Japanese Patent Publication No. 55-3232, a flexible inner container 3 is housed inside the outer container 2, and the container is doubled.
An air chamber 4 is formed between the inner container 3 and the inner container 3, and the mouth tube portion 5 of the inner container 3 is screwed into the mouth tube portion 1 of the outer container 2. A fluid dispensing device 11 is provided, and when the fluid in the inner container 3 is dispensed by the fluid dispensing device 11, the inner container 3 shrinks by the volume of the reduced fluid, and as a result, the inner container 3 The air chamber 4 is formed through the gap between the threaded joint between the mouth part 5 and the mouth part 1.
Outside air is allowed to enter the inner container 3 to prevent liquid from leaking to the outside, and air is prevented from entering the inner container 3 and interfering with pouring out the fluid.

[Problem that the invention attempts to solve]

However, in the method described in Japanese Patent Publication No. 55-3232, the introduction of air into the air chamber 4 is limited to the inner container 3.
The fluid dispensing device 11 is used to dispense the inner container 3 gradually from the gap between the opening 5 of the outer container 2 and the opening 1 of the outer container 2.
If the fluid inside is continuously poured out, the introduction of air cannot keep up with the negative pressure in the air chamber 4, making it difficult for the fluid pouring device 11 to suck it up, and the pouring operation may not be performed smoothly. There is.

The present invention was developed in view of these points, and aims to appropriately introduce air into the air chamber between the outer container and the inner container to facilitate smooth dispensing operations by the fluid dispensing device. This is a technical issue.

[Means for solving problems]

In order to solve the above-mentioned technical problem, the present invention has a flexible inner container 3 housed in an outer container 2 which has a mouth barrel portion 1 and is formed to be difficult to deform. An air chamber 4 is formed between the inner container 3 and the outer container 2, and the mouth tube 5 of the inner container 3 is positioned within the mouth tube 1 of the outer container 2. The following technical measures were taken in the fluid dispensing container into which the dispensing device 11 was fitted.

That is, the fluid dispensing device 11 has a piston 14, which is urged upwardly by a spring 15, in a cylinder 12 that fits into the inner container 3 so that the upper end opening communicates with the outside air in a watertight and sliding manner. It is inserted freely. A spout pipe 21 is connected to the piston 14, and a spout head 22 is provided at the tip of the spout pipe 21. Also, the piston 14 corresponds to the mouth cylinder part 5 of the inner container 3, and
A vent hole 26 is provided in a portion of the cylinder 12 that is located above the raised position of the cylinder 12, and the air chamber 4 and the vent hole 26 of the cylinder 12 are connected to the mouth barrel portion 5 of the inner container 3. An air introduction hole 6 was bored to form a fluid pouring container.

[Effect]

The piston 14 slides within the cylinder 12 due to the vertical movement of the ejection head 22, sucks up the fluid in the inner container 3, and pours it out of the container. Due to this pouring, the inside of the inner container 3 becomes negative pressure and the inner container 3 itself contracts.
The air chamber 4 between the inner container 3 and the outer container 2 is also made negative pressure. Therefore, outside air enters the air chamber 4 from the upper end opening of the cylinder 12 through the ventilation hole 26 and the air introduction hole 6, and the pressure is adjusted.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

An outer container 2 having a spout 1 at the top is made of synthetic resin and has a wall thickness that is sufficient to prevent deformation. Further, an inner container 3 is housed within the outer container 2, and an air chamber 4 is formed between the inner container 3 and the outer container 2. The inner container 3 is made of synthetic resin and has a thin wall so as to have flexibility, and is provided with a mouth tube part 5 formed at the top to be thick enough not to be deformed, and has a tapered bottom part. It is spindle-shaped.
The mouth tube part 5 of the inner container 3 is located inside the mouth tube part 1 of the outer container 2, and an air introduction hole 6 is bored in the middle part thereof. Moreover, the mouth tube part 5 of this inner container 3
The upper part of the air introduction hole 6 is formed to have a larger diameter than the lower part.

Then, the cylinder 12 of the fluid dispensing device 11 is fitted into the mouth barrel portion 5 of the inner container 3, and the outer container 2
It is fixed with a threaded tube 13 which is screwed onto the outside of the mouth tube portion 1 of the tube. This cylinder 12 is watertightly fitted into the lower part of the mouth barrel part 5 of the inner container 3, and forms a gap between it and the upper part of the mouth barrel part 1. Further, an annular piston 14 is inserted into the cylinder 12 in a watertight and slidable manner.
is a spring 15 stretched between the bottom of the cylinder 12 and
is biased to the upper position. Also, cylinder 1
A suction hole 16 for the fluid is bored at the lower end of the inner container 3, and a ball-shaped check valve 17 is provided in this part. It is set up.

Further, a shaft 19 is erected upward from the inner lower end of the cylinder 12 along the axis of the cylinder 12, and this shaft 19 passes through the inside of the piston 14 and comes into contact with the inner periphery of the piston 14 at its upper end, causing the piston 14 to rise. When the valve 20 is stopped, the fluid inside the cylinder 12 is prevented from being poured out to the outside by contacting the valve 20.
is provided.

Further, the upper end opening of the cylinder 12 is open to the outside air, and furthermore, a spout pipe 21 is connected to the piston 14 and protrudes from the upper end opening of the cylinder 12 to the outside. A spout head 22 is provided at the upper end of the spout pipe 21, and a nozzle pipe 23 is protruded from one side of the spout head 22, and a plug can be detachably attached to a nozzle hole at the tip of the nozzle pipe 23. A body 24 is fitted. Further, a ball-shaped check valve 25 is provided at the upper part of the spout pipe 21 to prevent outside air from flowing into the container from the nozzle pipe 23.

A vent hole 26 is formed in a portion of the cylinder 12 corresponding to the piston 14 at the maximum raised position, and this vent hole 26 faces the gap between the cylinder 12 and the mouth barrel portion 5 of the inner container 3, and the vent hole 26 is open to the air. Introduction hole 6
is connected to. If you look at this air introduction hole 6 as the center, this air introduction hole 6 is interposed between the air chamber 4 and the ventilation hole 26, and the outside air flows from the upper end opening of the cylinder 12 through the air introduction hole 26 and the air introduction hole 6. The air is introduced into the air chamber 4 through the air.

When the fluid in the inner container 3 is discharged to the outside by the operation of the fluid dispensing device 11, the pressure inside the inner container 3 becomes negative, and the inner container 3 contracts, so that the pressure inside the air chamber 4 also becomes negative. When the piston 14 is at the maximum raised position, the vent hole 26 is blocked by the piston 14, so outside air cannot be introduced into the air chamber 4. 22
When the piston 14 is lowered by pressing , the vent hole 26 is also opened, so that outside air is introduced into the air chamber 4 through the air introduction hole 6. Therefore, the pressure in the air chamber 4 can be adjusted appropriately.

In the embodiment, the vent hole 26 is closed by the piston 14 at the maximum raised position of the piston 14, but it may be formed at a position further above the maximum raised position of the piston 14.

[Effect of idea]

According to the present invention, the air introduction hole 6 is formed in the mouth barrel portion 5 of the inner container 3, and outside air can be easily introduced into the air chamber 4 between the outer container 2 and the inner container 3. 3 and the resulting negative pressure in the air chamber 4 can be adjusted instantaneously, so that dispensing by the fluid dispensing device 11 is not hindered by the negative pressure in the container. It is carried out smoothly without any problems.

In addition, if the container is left in a high temperature environment and the air in the air chamber 4 expands and becomes high pressure, the inner container 3 may be pushed and the fluid may be poured out. Since the air in the expanded air chamber 4 escapes to the outside through the air introduction hole 6 and the ventilation hole 26,
The fluid will not be easily poured out.

[Brief explanation of the drawing]

Fig. 1 is a half-cut vertical front view showing an embodiment of the present invention, Fig. 2 is a perspective view of an outer container 2 and an inner container 3, and Fig. 3 is a perspective view of an outer container 2 and an inner container 3.
The figure is a longitudinal sectional front view of a conventional fluid dispensing container. 1... Mouth part of the outer container, 2... Outer container, 3...
Inner container, 4... Air chamber, 5... Mouth part of the inner container,
6... Air introduction hole, 11... Fluid pouring device, 1
2...Cylinder, 14...Piston, 15...Spring, 21...Spout pipe, 22...Ejection head, 26
...Vent.

Claims (1)

[Claims for Utility Model Registration] A flexible inner container 3 is housed in an outer container 2 which has a mouth barrel portion 1 and is formed to be difficult to deform, and between the inner container 3 and the outer container 2. An air chamber 4 is formed in the inner container 3, and the mouth barrel portion 5 of the inner container 3 is positioned within the mouth barrel portion 1 of the outer container 2.
In a fluid dispensing container in which a fluid dispensing device 11 is fitted, the fluid dispensing device 11 is arranged in a cylinder 12 fitted in the inner container 3 such that the upper end opening communicates with the outside air. A piston 14 urged upward by a spring 15 is inserted in a watertight and slidable manner, and a spout pipe 21 is connected to the piston 14, and a spout head is attached to the tip of the spout pipe 21. 22, and a vent hole 26 is provided in a portion of the cylinder 12 that corresponds to the mouth barrel portion 5 of the inner container 3 and is located above the raised position of the piston 14. A fluid dispensing container characterized in that an air introduction hole 6 connecting the air chamber 4 and the vent hole 26 of the cylinder 12 is bored in the mouth barrel portion 5 of the inner container 3.