JPH0239955Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a metering stopper, and particularly to a metering stopper for a flexible container containing a fluid.

[Conventional technology]

Conventionally, as a metering stopper for flexible containers,
In addition to those described in Japanese Utility Model Publication No. 42842 and Japanese Utility Model Publication No. 58-8683, many other devices are known.

Utility Model Publication No. 57-42842, as shown in FIG.
The inner bottom part of the container 31 of No. 2 is covered with a bottom plate 33, and an outlet port 34 is provided on this bottom plate 33. Also, the outside of the container 31 of the mouth and neck part 32 is covered with a top plate 35, and an extrusion port 36 is provided on this top plate 35. A slidable piston 37 is provided in the mouth and neck portion 32, and this piston 3
A through hole 38 is provided in the outlet 7, and a check valve 39 formed of a metal ball for opening and closing the outlet 34 is provided between the piston 37 and the outlet 34 in the mouth and neck part 32. a push rod 40 that is inserted into the neck 32 and whose tip abuts the piston 37;
The cap 41 that protrudes inward is attached to the mouth and neck part 32.
It is screwed onto the

Then, when the cap 41 is removed and the container 31 is compressed, the fluid contents inside the container 31 are released into the check valve 3.
Press 9 to enter the mouth and neck area 32 from the outlet 34,
Push the piston 37 toward the extrusion port 36. Next, when the cap 41 is turned and screwed on, the push rod 40 inserted from the extrusion port 36 pushes the piston 37, so that the piston 37 and the outlet 3
The contents flowing between the container 3 and the container 3 are pressed by the check valve 39 through the outlet 34.
1 , the liquid flows through the through hole 38 of the piston 37 between the piston 37 and the extrusion port 36 . So, again, cap 4
1 is removed and the container 31 is pressed, the contents inside the container 31 flow into the mouth and neck part 32 and push the piston 37 toward the extrusion port 36.
The contents remaining between the two are extruded from the extrusion port 36.

Further, as shown in FIG. 4, in the case of Utility Model Publication No. 58-8683, a cylinder 52 whose outer end surface of the container is closed with a top plate 51 is fitted into a neck part 53 of a container such as a tube, and the cylinder 52 is fitted with a top plate 51. An extrusion port 54 is formed in the plate 51, and a guide tube 56 having a guide path 55 following the extrusion port 54 is provided on the inner surface of the top plate 51 to protrude toward the inside of the container, and this guide tube 56 is inserted through the container. A sliding cylinder 57 is provided so as to protrude from a piston 58 that is slidably provided in the cylinder 52, and the piston 58 is further urged toward the inside of the container by a spring 59, so that the sliding cylinder 57 is inserted into the container. Outlet 60 at inner end
is provided, and when the sliding tube 57 moves toward the extrusion port 54 side together with the piston 58, the guide tube 5
6 is provided with a plug 62 that closes the inner opening 61 of the container.

Then, when the container is compressed, the fluid contents in the container are led out from the outlet 60, pass through the sliding tube 57 and the guide tube 56, and are pushed out from the extrusion port 54. At the same time, the piston 58 is also pushed, so the sliding tube 57 formed integrally with the piston 58 moves toward the extrusion port 54, and the plug 62 closes the opening 61 of the guide tube 56, so that the contents are kept there. stop,
It no longer comes out of the extrusion opening 54.

[Problem that the invention attempts to solve]

However, in the former structure, the cap 41
The operation is troublesome because it is not possible to take out a fixed amount without repeating the operations of removing and screwing on.

In addition, in the latter structure, if the force pressing the container is weak, the sliding speed of the sliding tube 57 by the piston 58 will be slow or the sliding tube 57 will not slide. It stays open longer or stays open, allowing more contents to be taken out than necessary.

The present invention was developed in view of these points, and the technical problem is to provide a metering stopper that can always accurately dispense a fixed amount of contents and is easy to operate. .

[Means for solving problems]

The technical means for solving the above technical problems are as follows.

A cylinder 3 is attached to the mouth of the flexible container 1 (this cylinder 3 may be formed by using the mouth and neck part 2 of the container 1 as is, or by fitting into the mouth and neck part 2).
The inner end surface of the container 1 of the cylinder 3 is covered with a bottom plate 4, and the outer end surface of the container 1 of the cylinder 3 is covered with a top plate 6, an outlet port 7 is provided in the bottom plate 4, and an extrusion port 8 is formed in the top plate 6. do.

A partition body 11 provided inside the cylinder 3
The inside of the cylinder 3 is partitioned into a valve chamber 12 on the outlet port 7 side and a piston chamber 13 on the extrusion port 8 side.

This partition body 11 includes a valve chamber 12 and a piston chamber 13.
A communication port 14 is provided for communication between the two. moreover,
A bypass pipe 16 having a bypass port 17 communicating with the piston chamber 13 at the tip thereof projects toward the piston chamber 13 side.

Further, a valve 2 is provided in the valve chamber 12 that selectively opens and closes the outlet port 7 and the inlet 15 to the bypass pipe 16.
1 is provided, and the bypass pipe 16 is passed through the piston chamber 13, and a spring 23 is used to close the partition body 1.
A piston 22 biased toward the first side is slidably provided.

[Effect]

When the container 1 is compressed, the valve 21 is pushed and the fluid contents flow into the valve chamber 12 from the outlet 7. At this time, the valve 21 closes the inlet 15 of the bypass pipe 16 by being pushed by the contents. Therefore, the contents in the valve chamber 12 are transferred to the communication port 1 provided in the partition body 11.
4 flows between the partition body 11 and the piston 22 in the piston chamber 13, and pushes the piston 22 toward the extrusion port 8 while resisting the biasing force of the spring 23. Therefore, when the pressure on the container 1 is released, the piston 22 slides toward the partition 11 due to the biasing force of the spring 23, and the contents flow back into the valve chamber 12 from the communication port 14. The contents flowing back cause the valve 21 to close the outlet 7 and open the inlet 15 of the bypass pipe 16, so that the contents pass from inside the valve chamber 12 through the bypass pipe 16 and via the bypass port 17 at its tip. Piston chamber 1
3 flows between the top plate 6 and the piston 22. Then, when the container 1 is compressed again, the valve chamber 1
The piston 22 is pushed by the contents flowing between the partition body 11 and the piston 22 in the piston chamber 13 through the communication port 14 from inside the piston 22, and the top plate in the piston chamber 13 is pushed by the piston 22. The contents flowing between the piston 6 and the piston 22 are pushed out from the extrusion port 8.

〔Example〕

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

A cylindrical mouth and neck part 2 with a male thread carved on the outer periphery is provided at the mouth of a flexible container 1 such as a tube containing a fluid content such as toothpaste, and a cylinder 3 is installed inside this mouth and neck part 2. (The neck part 2 of the container 1 itself may be used as the cylinder 3.)

The end surface of the cylinder 3 inside the container 1 is covered with a bottom plate 4, and the end surface of the cylinder 3 outside the container 1 is covered with a top plate 6 that is fitted into the opening 5 of the mouth and neck part 2. An outlet port 7 is provided in the center of the bottom plate 4, and an extrusion port 8 is provided in the center of the top plate 6.
is formed.

In addition, a circular and container-shaped partition 11 is provided in the cylinder 3 with the open surface facing the bottom plate 4 side, and this partition 11 allows the inside of the cylinder 3 to be connected to the valve chamber 1 on the outlet port 7 side.
2 and a piston chamber 13 on the extrusion port 8 side.

This partition body 11 includes a valve chamber 12 and a piston chamber 13.
A communication port 14 is provided for communicating with. Furthermore, this partition body 11 has an entrance 15 at the center of its bottom.
A bypass pipe 16 is provided protruding toward the piston chamber 13 side, and this bypass pipe 16 has bypass ports 17 communicating with the piston chamber 13 on both sides of the tip.
have.

Further, a valve 2 is provided in the valve chamber 12 that selectively opens and closes the outlet port 7 and the inlet 15 to the bypass pipe 16.
1 is provided, and a piston 22 is slidably provided in the piston chamber 13, and this piston 22 passes through the bypass pipe 16 and is stretched between the top plate 6 and the piston 22. It is biased toward the partition body 11 by a spring 23.

Then, the piston 22 causes the piston chamber 1 to
3 is the first section between the piston 22 and the partition body 11.
It is divided into a piston chamber 13a and a second piston chamber 13b between the piston 22 and the top plate 6.

Further, a cap 24 having a female thread corresponding to the male thread of the mouth and neck part 2 is removably screwed onto the mouth and neck part 2, and the inner surface of this cap 24 has an extrusion opening 8 of the top plate 6 when the cap 24 is screwed on. A protrusion 25 that closes the is provided.

Next, the effect will be explained.

When the container 1 is compressed, the valve 21 is pushed and the fluid contents flow into the valve chamber 12 from the outlet 7. At this time, the valve 21 closes the inlet 15 of the bypass pipe 16 by being pushed by the contents. The contents of the valve chamber 12 are then transferred to a communication port 14 provided in the partition body 11.
The piston 22 flows into the first piston chamber 13a through the piston chamber 13a, and pushes the piston 22 toward the extrusion port 8 while resisting the biasing force of the spring 23. Therefore, when the pressure on the container 1 is released, the piston 22 is pushed into the partition body 1 by the biasing force of the spring 23.
1 side, and the contents are transferred from the communication port 14 to the valve chamber 12.
flow back inside. The contents that flowed back cause the valve 21 to block the outlet 7, and the inlet 1 of the bypass pipe 16
5 is opened, the contents pass from the inside of the valve chamber 12 through the bypass pipe 16, and flow into the second piston chamber 13b via the bypass port 17 at its tip. When the container 1 is pressed again, the piston 22 is pushed by the contents flowing from the valve chamber 12 through the communication port 14 into the first piston chamber 13a, and this piston 22 causes the second The contents remaining in the piston chamber 13b are pushed out from the extrusion port 8 in fixed amounts at a time.

This amount of extrusion is equal to the volume of the piston chamber 13 minus the volume of the piston 22, the volume of the spring 23, and the volume occupied by the bypass pipe 16.

By repeating this operation, the contents are taken out one by one.

[Effect of idea]

According to the present invention, the contents are reliably measured in the piston chamber, so that the amount taken out is always constant.

In addition, the contents can be removed by simply squeezing the container, making it extremely easy to operate and can be done with just one hand.
easy to handle.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is an exploded perspective view thereof, Fig. 3 is a longitudinal sectional view showing a conventional example, and Fig. 4 is a longitudinal sectional view showing another conventional example. It is. 1... Container, 3... Cylinder, 4... Bottom plate, 6
...Top plate, 7...Outlet port, 8...Extrusion port, 11...
... Partition body, 12 ... Valve chamber, 13 ... Piston chamber,
14... Communication port, 15... Entrance to the bypass pipe,
16...Bypass pipe, 17...Bypass port, 21
...Valve, 22...Piston, 23...Spring.

Claims (1)

[Scope of utility model registration request] A cylinder 3 is provided at the mouth of the flexible container 1, the inner end surface of the cylinder 3 is covered with a bottom plate 4, the outer end surface of the cylinder 3 is covered with a top plate 6, and an outlet port 7 is provided in the bottom plate 4. At the same time, an extrusion port 8 is formed in the top plate 6, and a partition 11 provided in the cylinder 3 allows the inside of the cylinder 3 to be connected to a valve chamber 12 on the outlet port 7 side.
and a piston chamber 13 on the extrusion port 8 side, and a communication port 14 is provided in this partition body 11 to communicate the valve chamber 12 and the piston chamber 13.
A bypass pipe 16 having a bypass port 17 at its tip leading to the piston chamber 13 is provided to protrude toward the piston chamber 13, and the outlet port 7 and the inlet 15 to the bypass pipe 16 can be selectively opened and closed in the valve chamber 12. A valve 21 is provided to
A metering stopper characterized in that a piston 22 is slidably provided in the piston chamber 13 through the bypass pipe 16 and urged toward the partition 11 by a spring 23.