JPS6233721Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a stopper that discharges a fixed amount of liquid from a container.

<Conventional technology> Conventionally, as a metering stopper for liquids,
Those shown in Japanese Utility Model Publication No. 14958 and Japanese Utility Model Publication No. 42-14959 are known.

In the former case, a cylindrical body with a small hole in the bottom is suspended from a stopper body with a discharge port, and a cylindrical stopper with through holes in several places in the partition wall connected to the top end of the cylindrical body is inserted and fixed. A slider is inserted into the cylindrical body so as to be able to freely swing up and down to open and close the discharge port, and a ring gasket for opening and closing the through hole of the partition wall is inserted into the gap between the plug body and the inner plug, When dispensing the contents, the container body is turned over and pressed, thereby pushing up the ring gasket and discharging it through the discharge port. When the container body is further pressed, the slider rises to close the lower surface of the discharge port and stop discharge.

The operating principle of the latter is almost the same,
It just doesn't have any structural parts.

<Problems to be solved by the invention> However, in the conventional metering stopper described above, the container body is pressed to discharge a fixed amount of the liquid within the range in which the slider moves within the cylinder. The rate of rise of the slider differs depending on the viscosity of the content liquid, so even though it is said to be a fixed amount, it does not mean that the volume of the content between the slider of the cylinder and the lower end of the discharge port is discharged.
The problem is that it is difficult to quantify accurately because it is also discharged from the through holes in the partition wall through the discharge port.

<Means for Solving the Problems> The present invention solves the above-mentioned problems of the conventional technology and makes it possible to always accurately discharge a certain amount of liquid contents. , a support cylinder with an outlet at the top, an outer piston that can move freely inside the support cylinder and has an inlet and an outlet on the sides, and an inner piston that can move freely inside the outer piston and has one end open. It is characterized in that it consists of a piston, the outer piston and the inner piston form a measuring chamber, and a space is provided between the top of the support tube and the front wall of the outer piston.

<Function> When the metering stopper attached to the opening of the container is upright, the outer piston and inner piston are at the lowest position, and at this time, the window of the support tube and the inflow port of the outer piston are communicating, and the inner piston is located below the inlet of the outer piston. Next, when the container is tilted, the liquid content enters the gap between the support cylinder and the outer piston, and the gap between the outer piston and the inner piston, and tension acts, making it impossible for each piston to move by its own weight alone. The content liquid enters the measuring chamber. and,
When pressure is applied while the container is tilted, the outer piston moves forward. At this time, the inner piston does not move forward because pressure is applied from the front and back, but the outer piston moves together with the inner piston, and the inlet of the outer piston is blocked by the wall of the support cylinder, causing the content in the measuring chamber to will be separated from the remaining liquid in the container.

On the other hand, inside the metering chamber, the outlet provided in the outer piston communicates with the outlet of the support tube, and as a result, the pressure inside the metering chamber decreases, the pressure inside the container advances the inner piston, and the liquid inside the metering chamber is discharged. It is discharged through the outlet. Next, when the metering is finished and the pressurization is stopped, the pressure inside the container is reduced by the restoring force of the container itself, air is sucked in from the outlet, and the outer piston retreats and returns to its original position.

<Example> FIG. 1 is a partially cutaway front view of the metering stopper of the present invention, and FIGS. 2 and 3 are cross-sectional views showing the metering stopper in a state in which the container is tilted and pressurized.

As shown in FIG. 1, the metering stopper A of the present invention includes a support tube 1 and an outer piston 2 that moves inside the support tube 1.
It consists of an inner piston 3 that moves within the outer piston 2, etc., and these parts are preferably molded from synthetic resin, but may also be made from other metals or the like.

The support tube 1 has a cylindrical shape and is connected to a lid portion 4 having a discharge port a, and has a convex portion 5 that fits into the opening of the container B, a groove 6 inside the convex portion 5, and a groove 6 inside the convex portion 5. A window 7 is provided on the opposite side and deeper into the container B for allowing the liquid content to flow into the measuring chamber C. Further, a rear cover 8 having a return hole b for adjusting the return speed of the inner piston 3 is tightly fitted into the opening at the lower end of the support cylinder 1. Here, the inner diameter of the support tube 1 is larger at the portion where the window 7 is located by the protrusion of an outer stopper 9 provided on the outer piston 2, which will be described later, and the inner diameter changing portion 10 is continuous at a certain angle. The angle matches the angle of the inclined wall part 11 of the outer stopper 9, and when the outer piston 2 moves forward, the changing part 10 and the inclined wall part 11 come into surface contact, and the clearance between the support cylinder 1 and the outer piston 2 is reduced. Prevent liquid leakage.

Next, the outer piston 2 is also cylindrical and moves within the support cylinder 1, opening an outflow port c provided at the front of the cylinder, an inflow port d provided in the middle, and a ventilation hole e provided in the front wall 12. Furthermore, an outer stopper 9 for controlling the forward movement of the outer piston 2 at a fixed position is protruded, and the outer stopper 9 is formed with a slanted wall part 11 that makes surface contact with the changing part 10 of the support cylinder 1. ing. Furthermore, the rear part of the outer piston 2 is closed with a rear plug 13 having a forward adjustment hole f. Here, the inner diameter of the outer piston 2 is larger at the inner part where the outer stopper 9 is provided by the protrusion of the inner stopper 14 of the inner piston 3, which will be described later, and the changing portion 15
has a constant angle similar to the changing part 10 of the support cylinder 1, and matches the angle of the inclined wall part 10 of the inner stopper 14, so that when the inner piston 3 moves forward, the changing part 15 and the inclined wall part 16 are in surface contact, and the outer piston 2
This prevents liquid leakage from the clearance between the inner piston 3 and the inner piston 3.

As mentioned above, the inner piston 3 has a cylindrical shape and is closed at the front by the top wall 17. The other side is open, and an inner stopper 14 with a slanted wall portion 16 is provided around the open side.

As mentioned above, the quantitative stopper A of the present invention has a support cylinder 1.
It has a double piston structure, with an outer piston 2 inside and an inner piston 3 inside this outer piston 2.
Each piston has a clearance that allows it to move freely, and this clearance is 0.05 to 0.2 relative to the diameter.
It is approximately mm, and may be increased as the viscosity of the content liquid increases. Therefore, before the content liquid comes into contact with each piston, when the metering stopper A is tilted, the outer and inner pistons 2 and 3 move freely, but when they are tightly fitted into the opening of a plastic container, etc., the content liquid When touched, it functions as the metering stopper of the present invention, and its operation and function will be described below.

That is, when the metering stopper A attached to the opening of the container B is erected, the outer piston 2 and the inner piston 3 are at the lowest position as shown in FIG. At this time, the window 7 of the support cylinder 1 and the inlet d of the outer piston 2 communicate with each other, and the inner piston 3 is located below the inlet d of the outer piston 2. Next, when the container B is tilted, the outer piston 2 and the inner piston 3, which move freely when the container B is empty as described above, touch the content liquid and the support cylinder 1
The content liquid enters the gap between the outer piston 2 and the gap between the outer piston 2 and the inner piston 3, and the tension makes it impossible for each piston to move by its own weight alone. In this case, if the contact surface between the rear cover 8 of the support cylinder 1 and the rear stopper 13 of the outer piston 2 is made smooth, the outer piston 2 will no longer move under its own weight, and the container B will be tilted to allow the metering stopper A to release the contents. By covering the measuring chamber C with the content liquid from the window 7 and the inlet d.

Next, when pressurizing the container while tilting it, the internal pressure of the container pushes the front wall 12 of the outer piston 2 and the outer piston 2 moves forward. In this case, the inner piston 3 does not move forward because pressure is applied from the front and back, but the outer piston 2 moves together with the inner piston 3, and the changing part 10 of the support cylinder 1 and the oblique wall part 11 of the outer stopper part 9 of the outer piston 2 It hits and stops. FIG. 2 is an explanatory diagram showing a state in which the outer piston 2 has moved and moved forward, and the liquid inside the metering chamber C has an inlet port d of the outer piston 2 blocked by the wall surface of the support cylinder 1. This means that it has been separated from the remaining liquid in the container. Here, since the changing part 10 of the support cylinder 1 and the inclined wall part 11 of the outer piston 2 are in surface contact with each other at the same angle, leakage from the gap between the support cylinder 1 and the outer piston 2 is prevented even when pressurized thereafter. It turns out. On the other hand, in the measuring chamber C, the outlet c provided in the outer piston 2 communicates with the groove 6 provided inside the tip of the support tube 1, and there is a gap between the lid portion 4 of the support tube 1 and the front wall 12 of the outer piston 2. The dimensions are predetermined so that the gap F stops at the outer piston 2, and as this gap F also communicates with the discharge port a, the pressure in the metering chamber C decreases, and the pressure inside the container reaches the forward adjustment hole f of the outer piston 2. Through inner piston 3
is moved forward, and the liquid inside the metering chamber C is discharged through the outlet c, the groove 6, and the outlet a. FIG. 3 is an explanatory diagram showing a state in which the inner piston 3 has completed its forward movement, and the slanted wall portion 16 formed on the inner stopper 14 of the inner piston 3 comes into surface contact with the changing portion 15 of the outer piston 2 and stops. To prevent leakage from between an outer piston 2 and an inner piston 3. Therefore, even if pressurization continues, the support cylinder 1 and the outer piston 2 and the outer piston 2 and the inner piston 3 do not leak due to surface contact, and only a fixed amount of the contents in the measuring chamber C is discharged each time. .

Next, when the pressurization is stopped after the metering is complete, the pressure inside the container is reduced due to the restoring force of the container itself, and air is sucked in from the outlet a, causing the outer piston 2 to move. Step back and return to your original position.
Even if pressure is applied intermittently with the container tilted, the inner piston 3 does not return, so the conditions shown in Figures 3 and 4 are repeated, and the liquid content is not discharged, so the pressure is stopped and the container is closed. When the is erected to its original state, the outer piston 3
descends and returns to its original position. In this case, air enters the measuring chamber C through the ventilation hole e, drains the liquid inside the inner piston 3 through the return hole b and the forward adjustment hole f, and then descends under its own weight, dropping to the lowest position as shown in Fig. 1. Returns to original state.

Here, the forward adjustment hole f can adjust the speed when the inner piston 3 moves forward, and if the diameter of the forward adjustment hole f is large, the inner piston 3 can be adjusted.
The forward movement of the inner piston 3 becomes faster, and if the diameters of the forward adjustment hole f and the return hole b are large, the inner piston 3 returns.

Further, the vent hole e should have a small diameter so that the measured content liquid does not come out too much during discharge, but it may have a large diameter if the content liquid has a high viscosity.

<Effects of the invention> As described above, the metering stopper of the present invention is a practical product that can accurately discharge a metered amount by tilting the container and pressurizing it, and has extremely excellent functionality with no leakage or dripping. It is a quantitative stopper with high performance.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a partially cutaway front view of a metering stopper attached to the opening of a container, and Fig. 2 is a partially cutaway front view of a metering stopper attached to the opening of a container; , FIG. 3 is a vertical cross-sectional view showing a state in which the outer piston has moved forward, FIG. 3 is a vertical cross-sectional view showing a state in which the inner piston has also moved forward and ejection has been completed, and FIG. 4 is a longitudinal cross-sectional view showing a state in which pressurization is stopped. It is a front view. A... Metering stopper, B... Container, C... Measuring chamber,
DESCRIPTION OF SYMBOLS 1...Support tube, 2...Outer piston, 3...Inner piston, 4...Lid, 5...Protrusion, 6...Groove, 7
...Window, 8...Rear cover, 9...Outer stopper, 10
...Change part, 11...Slanted wall part, 12...Front wall, 1
3...Rear plug, 14...Inner stopper, 15...Change part, 16...Slanted wall part, 17...Top wall, a...Outlet, b...Return hole, c...Outlet, d ...Inflow port, e...Vent hole, f...Forward adjustment hole.

Claims (1)

[Scope of utility model registration request] a support tube attached to the container and having a window on the side and an outlet on the top; an outer piston that can move freely within the support tube and has an inlet and an outlet on the side;
and an inner piston that can freely move within the outer piston and is open at one end, the outer piston and the inner piston forming a measuring chamber, and a space between the top of the support cylinder and the front wall of the outer piston. A quantitative stopper for liquid, characterized by being provided with a liquid metering stopper.