JPH03133748A - Container having pour spout - Google Patents

Abstract

PURPOSE:To obtain a container having a pour spout with ease of squeezing action and no air spouting by providing an operating external casing with a shape restoration property, an internal container main body with a discharge nozzle and a sealed air chamber which is provided between the external casing and the container main body and has a check valve. CONSTITUTION:When a content (w) composed of viscous fluid is filled in an internal container main body 5, and an operating external casing 2 is squeezed by hand to exert a compression force F on the circumferential surface of the operating external casing 2 after a screwed cap 10 is removed, the compression force F acts on the circumferential surface of the internal container main body 5 as a uniform pressure (f) through the sealed air chamber 12 so that the internal container main body 5 is squeezed, causing the content (w) to spout from a discharge nozzle 9 of a discharge cap 8 through an outlet mouth 6. When the squeezing force is released, the operating external casing 2 restores its original shape, causing the volume of the sealed air chamber 12 to expand. Therefore, as a negative pressure is developed inside, air flows into the air chamber 12 through a check valve 11 until the pressure in the air chamber 12 reaches the ambient pressure. And, the internal container main body 5 is deformed into a shrunk shape due to the internal pressure of the sealed air chamber 12 after the content flows out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dispensing container capable of storing viscous fluids and liquids such as mayonnaise and ketchup and discharging them little by little.

[Prior art] In the case of a dispensing container in which the viscous fluid or liquid inside is taken out little by little, and in the case of a flexible container whose shape does not recover, as the amount of the contents decreases, a strong squeezing operation is required. In addition, there are problems in that the container is crushed, resulting in an unsightly appearance.

On the other hand, for items such as laminated tubes that can return to a specified shape, there are problems such as air bubbles being generated and the contents scattering due to the air inside mixed with the contents being blown out as the tube is squeezed out. There is a point. Furthermore, when taking out mayonnaise, ketchup, etc., as the amount of the contents decreases, it is necessary to move the contents toward the end of the eye by inverting the container, etc., which is troublesome and requires rapid discharge. I can't.

An object of the present invention is to provide a pouring container which can be easily squeezed without changing the external shape of the container, and which has a structure in which no air is blown out.

[Means for Solving the Problem] The present invention provides an operating outer casing that is compressible and has shape recovery properties, and a flexible casing that is housed in the operating outer casing and whose outlet end can be opened to the outside. The device is characterized in that it includes a transparent inner container body, a sealed air chamber formed between the operating outer casing and the inner container, and a check valve that introduces outside air into the air chamber.

[Function] When the operating outer casing is compressed, pressure is applied evenly to the surface of the inner container body through the closed air chamber, and the container body is squeezed and the contents flow out from its outlet end.

Moreover, when the compression of the operation outer casing is released, the outer casing returns to its shape, and the volume of the sealed air chamber expands and becomes negative pressure.

Therefore, air flows in from the check valve, and the air chamber is maintained at a high pressure state. At this time, the inner container body is maintained in a contracted shape as the contents decrease due to the internal pressure of the sealed air chamber.

Therefore, each time the operation outer casing is squeezed, uniform pressure is applied to the surface of the inner container main body, and even if the inner container body is gradually squeezed and the contents become less and less, it will not be a problem (ejected).

[Example] Figures 1 and 2 show a pouring container 1a according to a first example of the present invention.

Here, reference numeral 2 denotes a bottle-like operating outer casing made of a synthetic resin material having shape recovery properties, and an opening 3 of the outer casing 2 supports an opening 6 of a thin, flexible inner container body 5. , the inner container body 5 is housed in the outer operation casing 2. More specifically, a male screw 4 is formed around the upper end of the outer operation casing 2, and the reduced diameter part of the upper end serves as a connecting mouth end 3. The fixing flange 7 formed in the above is locked, the spout cap 8 is fitted to the reduced diameter part of the operation outer casing 2, and the screw lid 1o to which the spout beak 9 of the spout cap 8 is attached is attached to the screw cap 1o. It is configured by being screwed onto a male screw 4. Further, a check valve 11 that opens and closes only inward is provided on the side surface of the operation outer casing 2.

With this configuration, a sealed air chamber 12 is created between the operation outer casing 2 and the inner container body 5, and air is introduced only from the outside by the check valve 11.

The operation of this configuration will be explained with reference to FIG.

When the inner container body 5 is filled with the contents W made of a viscous fluid, the screw lid 10 is opened as shown in FIG.
, and then squeeze the operating outer casing 2 by hand to apply a compressive force F to the circumferential surface of the operating outer casing 2, as shown in FIG. 2 II. This compressive force F acts as a uniform pressure f on the circumferential surface of the inner container main body 5 via the closed air chamber I2, and the inner container main body 5 is squeezed.
The contents W flow out from the spout beak 9 of the spout cap 8 via the outlet end 6 . After that, when the squeezing force is released as shown in FIG. Outside air flows in from the closed air chamber 12.
The inside pressure is equal to the outside pressure.

At this time, the internal container body 5 assumes a contracted shape as the contents flow out due to the internal pressure of the sealed air chamber 12.

The check valve 11 may be provided on the spouting cap 8 side as in the spouting container 1b shown in FIG.

In such a configuration, the diameter of the spouting cap 8 is increased, the spouting beak 9 is extended downward to form the fitting cylinder portion 14, and the outlet end 6 of the inner container body 5 is narrowed. As a result, the outlet end 6 is fitted into the fitting cylinder part 14 by elastic force. A space 13 is formed between the inner surface of the connection end 3 of the operation outer casing 2 and the outlet end 6, and a check valve 11 is disposed on the upper surface of the spouting cap 8. 11 makes the outside air space 1
3 into the closed air chamber 12.

With this configuration, it is easy to form the operation outer casing 2, and since the check valve 11 is normally covered with the screw lid 10 and is not exposed to the outside, dust etc. do not enter from the check valve 11. There is an advantage.

On the other hand, the elastic force in each part of the inner container main body 5 varies slightly, and the center part of the inner container main body 5 is more likely to elastically contract than the lower bottom part. This is because the lower sole is difficult to deform due to the bent portion of the bottom periphery. For this reason, the inner container body 5 is squeezed out by applying pressure to its entire circumferential surface, so when the content decreases, the amount of contraction in the center increases and the inner surfaces join together, causing the inner container body 5
It is expected that the inside will be cut off midway, making it impossible to discharge the contents W accumulated at the bottom.

Therefore, the configuration shown in Fig. 4.5.6 solves this problem.

Here, the pouring container IC shown in FIG. 4 has a triangular cross section by crushing the lower bottom of the inner container body 5, and therefore, the outlet end 6 of the inner container body 5 has a fixed flange 7 as a pouring cap. 8 and the connecting opening end 3 of the outer operation casing 2 to maintain the expanded state, so as the content W decreases, it becomes flattened from the lower edge side. Therefore, the contents W can be smoothly discharged from the dispensing beak 9 to the end.

In FIG. 5A, the opening is such that a communicating path 15 is formed from the lower edge of the inner container body 5 to the outlet end 6 when the inner container body 5 is flat.

Here, FIG. 5A shows that by forming arc-shaped curved edges 16, 16 on both side edges of the inner container body 5 in advance,
From the bulging state (dashed line in the figure) to the flat state shown by the solid line,
Communication passages 15 and 15 are formed along both side edges of the inner container body 5.

In addition, the opening in Figure 5 has a communicating path 15 formed in its center, which is created by forming vertical semicircular curved portions 17 in the center of both sides of the inner container body 5 in advance. can be done.

The pouring container 1d in FIG. 6 has a communicating rod 18 that hangs down from the outlet end 6 of the inner container main body 5 along the side edge, further along the bottom surface, and furthermore, inverted and kneaded along the other side surface. is applied. The communication rod 18 has a semicircular cross section, so that the communication path 15 can be secured even if the inner container main body 5 is flat. As the cross-sectional shape of the communicating rod 18, a stacked shape such as one made of radial blades such as four blades or three blades is proposed. The point is that even if the internal container main body 5 becomes flat, it may have a holding shape that can secure a communication path to the lower edge.

The pouring container 1e shown in FIG. 7 shows a configuration in which the inner container main body 5 can be replaced and the operation outer casing 2 and the like can be reused.

That is, in this embodiment, the operation outer casing 2 is constituted by an outer casing main body 20 and a palate part 21 that is screwed into a male screw 22 formed on the upper edge of the outer casing main body 20. A check valve ll is formed on the shoulder surface of the palate portion 21. Further, a male threaded portion 25 is formed at the upper end of the inner container body 5 to be screwed into the inner edge of the eye end of the palate portion 21, and a cap 27 is further provided at the beak-shaped outlet end 26 that projects upwardly from the male threaded portion 25. Fit together. Then, the inner container body 5 first has its male threaded portion 2.
After screwing and attaching the palate part 21 to the outer housing body part 2
0, and the inner surface of the lower end of the palate part 21 is screwed into the male screw 22 to be housed in the operation outer casing 2. Furthermore, by fitting the cap 27 to the outlet end 26,
The corner of the eye is blocked. The inner container body 5 can be taken out by doing the opposite, and when the contents W of the inner container body 5 are used up, a new inner container body 5 can be stored.

FIG. 8 shows a spouting container 1f having a configuration in which a check valve 28 is provided in the spout beak 9 of the spouting cap 8, which opens and closes only outwardly and allows the contents W to flow out. This configuration has the advantage that the mouth end 6 of the inner container body 5 is always blocked by the check valve 28, so that air can be blocked from flowing into the interior. Further, there is an advantage that the screw lid 10 is not required and the trouble associated with opening and closing the lid can be eliminated.

In each of the above configurations, the operation outer casing 2 is made of synthetic resin or the like so that it can be compressed by hand.
As in the pouring container 1d shown in the figure, the operation outer casing 2 may be made of metal or a hard material, and a pressure swelling surface 30 made of a flexible material may be formed on the side surface of the operation outer casing 2. . By repeatedly pressing the expanded surface 30, it becomes possible to increase the pressure inside the closed air chamber 12 and squeeze out the inner container body 5. The operating outer casing 2 having this pressing bulging surface 30 can also be included in the concept of an operating outer casing that is compressible and has shape recovery properties according to the present invention.

[Effects of the Invention] As described above, the present invention stores the inner container main body 5 in the outer operating casing 2, forms a sealed air chamber 2 between them, and compresses the inner container by compressing the outer operating casing 2. 0 Even if a uniform pressurizing force is applied to the circumferential surface of the container body 5 so that the contents W can be discharged from the outlet end 6, and the compressive force of the operation outer casing 2 is released, the closed air chamber 12 Outside air flows into the container from the check valve 11 to keep the internal pressure constant, and the inner container body 5 is maintained in a contracted state as the contents W are discharged. For this reason, the volume inside the inner container body 5 always changes only in the decreasing direction, so air does not flow in from the outlet end 6, and therefore the contents W are immediately discharged by the next compression operation of the outer casing 2. Moreover, air bubbles are not generated in the discharged contents W, or the contents W are not scattered due to the release of air.

Furthermore, since the inner container main body 5 can easily discharge the contents W to the end, and the operating outer casing 2 can return to its original state after the squeezing operation, its external shape can always be maintained and the appearance is good. It has excellent effects such as good

[Brief explanation of the drawing]

The accompanying drawings show embodiments of the present invention, and FIG. 1 is a vertical sectional side view of a pouring container 1a of the first embodiment, and FIG. DI is a longitudinal sectional side view of the dispensing container 1b of the second embodiment, FIG. 4 is a longitudinal sectional side view of the dispensing container 1c of the third embodiment, and FIG. 5 is a cross-sectional end view of a modified example of the inner container main body 5, FIG. 5 is a cross-sectional end view of the same side, FIG. FIG. 8 is a longitudinal sectional side view of the upper part of the dispensing container 1f of the sixth embodiment. la~1f...Pour container 2...Outer operation casing 3...Connection end 5...Inner container body 6...Outlet end 8--Pour cap 11--Return check Valve 12... Sealed air chamber 15... Communication passage 18... Communication rod 2 20... Outer casing main body 21... Palate section 26... Outlet end 28-... Check valve 30 ... Pressure swelling surface Fig. 1

Claims (1)

[Scope of Claims] An operating outer casing that is compressible and has shape recovery properties; a flexible inner container body that is housed within the operating outer casing and whose outlet end can be opened to the outside; A dispensing container comprising: a sealed air chamber formed between an outer operation casing and an inner container; and a check valve for introducing outside air into the air chamber.