JP4019311B2 - Dispensing container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dispensing container, and more particularly to a dispensing container such as an eye drop container capable of dispensing contents without allowing outside air to enter the container.
[0002]
[Prior art]
For example, in containers for storing medicines such as eye drops, many containers are used to push out the barrel of the container and pour it out. There was a problem that it returned to its original shape, and as a result, external air entered the inside of the container, and foreign substances and germs present in the air were mixed into the content liquid.
[0003]
As a method for solving such a problem, for example, Japanese Patent Laid-Open No. 4-297264 and Japanese Patent Laid-Open No. 6-14972 disclose a method in which a filter is provided in the discharge passage of the content liquid, -183047 describes a method for suppressing the entry of external air by allowing the container end to be folded into a flattened or flattened state so that the volume of the container decreases as the liquid content decreases. There is.
[0004]
Furthermore, as a method for preventing external air from entering, Japanese Patent Application Laid-Open No. 10-180853 comprises an outer layer and an inner layer that is detachably laminated on the outer layer. However, there is a description of a laminated container that introduces external air into the gap between the outer layer and the inner layer.
[0005]
[Problems to be solved by the invention]
However, the method of attaching a filter in the discharge flow path has problems such as clogging of the filter or the propagation of various bacteria in the filter portion, and the method of flattening the end portion of Japanese Utility Model Laid-Open No. 63-183047 Mainly, for example, it is intended to apply what is used for a toothpaste tube and the like, and there are problems in convenience of use and appearance.
[0006]
In addition, the container disclosed in Japanese Patent Laid-Open No. 10-180853 is used, for example, by storing a shampoo or the like and attaching a dispenser pump to the mouth portion. It is necessary to pour out by pressing.
[0007]
For this reason, in order to use a peelable laminated container as a dispensing container, the first check that has the function of allowing the contents to be poured out at the container outlet and disabling external air entry. A valve, a second check valve having a function of allowing the outside air to enter the gap between the outer layer and the inner layer and disabling the outflow, and an intake portion for allowing the outside air to enter the gap between the outer layer and the inner layer Although it is necessary, it is difficult to realize such a function, particularly in a small dispensing container such as eye drops, while maintaining high productivity.
[0008]
The present invention has been devised to solve the above-described problems of the prior art. In particular, the technical problem is a check valve mechanism and an intake section that can be realized even in a small container while maintaining high productivity. Therefore, an object of the present invention is to provide a dispensing container that is highly productive, does not enter the container of outside air, and is superior in terms of hygiene.
[0009]
[Means for Solving the Problems]
Of the present invention for solving the above technical problem, the means described in claim 1 is:
A squeeze-deformable and flexible outer layer that has a flexible inner layer that can be peeled from the outer layer and laminated to reduce volume. Having a container body with a slit formed in the intake section;
This outer cylinder has a cylindrical outer cylinder that is externally fitted to the upper portion of the container main body and has a through-hole for taking in external air while the inner peripheral surface of the lower end portion is in close contact with the container main body. A top plate portion covering the opening of the mouth portion at the upper end of the top plate, and having a cap body in which a spout is formed at the center of the top plate portion,
A first check valve portion that opens and closes the through-hole in the outer cylinder is assembled and fixed to the top plate portion with a first check valve portion that opens and closes the spout so that backflow of contents into the container body and inflow of outside air is impossible. In a state where the container body and the cap are assembled, the through hole and the intake portion are communicated in a sealed state via the second check valve.
It is in.
[0010]
2. The structure according to claim 1, wherein the container body and the cap body are assembled and fixed, and in a state where the inner peripheral surface of the lower end portion of the outer cylinder is in close contact with the container body, In the part where the vertical slit formed in the mold cutting part is formed, the action of the second check valve allows air to enter the gap between the outer layer and the inner layer, and the outflow from the gap to the outside of the container body Impossibly, the upper and lower through holes and the intake portion are connected in a sealed state.
[0011]
Here, the mold cut-off part is a part of the parison before blow molding, which is part of the part formed at the mouth of the container body from both sides with a split mold that is a blow mold. In the state where the inner layers are stacked, the laminate of the outer layer and the inner layer is cut while being crushed, so that the cut end surface is sandwiched between the outer layers on both sides, and the outer layer and the inner layer are separated while being separated. Thus, an intake portion (slit) for introducing outside air into the gap between the outer layer and the inner layer can be easily formed.
[0012]
After the contents are poured out by pressing the body part of the container body, the pressing is stopped, and when the pressing is released, the pouring of the contents stops, and the outer layer begins to be restored to its original shape by elastic recovery force, The function of the first check valve portion assembled and fixed to the top plate portion can prevent the backflow of contents into the container body and the entry of external air.
[0013]
At this time, since the inner layer remains in the reduced volume deformed state, external air is introduced from the through hole formed in the outer cylinder, and the outer layer is connected to the outer layer from the intake portion of the mouth via the second check valve portion. The inner layer enters the gap with the inner layer, and as a result, the outer layer is restored to the original shape while the inner layer remains in a reduced volume deformed shape.
[0014]
When the outer layer is restored to its original shape and pressed again to pour out the contents, the check function of the second check valve blocks the communication between the through hole and the air intake. The pressure is applied to the contents, and the contents are poured out from the container body through the spout by opening the first check valve.
[0015]
As described above, the external air does not enter the container body, and the content is not touched to the outside air by entering the gap between the outer layer and the inner layer. No container can be provided.
[0016]
Here, the slit serving as an air intake portion for introducing external air into the gap between the outer layer and the inner layer is a portion of the portion of the laminated cylindrical parison formed of the outer layer and the inner layer that is formed in the mouth portion in the vertical direction. It is formed in a die cutting portion that is sandwiched between split molds, and it is possible to keep the manufacturing cost low without the need for post-processing.
[0017]
Such an air intake portion can be formed by removing the outer layer portion of the mouth portion by, for example, a disk shape or a slit shape after the blow molding of the container body, but in an outer layer particularly in a small container. In this way, high-accuracy processing is required, and processing time is increased and manufacturing costs are increased.
[0018]
According to a second aspect of the present invention, in the first aspect of the present invention, the first check valve portion is a slit valve body made of a soft resin with a top cylindrical shape having a slit valve piece formed at the top, It is in.
[0019]
The configuration according to claim 2 relates to the first check valve portion, and by adopting a simple structure in which a slit valve piece is formed on the top portion, the first check valve portion can be easily molded, Incorporation into the container can be easily achieved.
[0020]
According to a third aspect of the present invention, in the first or second aspect of the invention, the outer cylinder is externally fitted to a cylindrical lower cylinder piece whose lower end portion is tightly fitted to the shoulder portion of the container body, and the mouth portion. The upper cylinder piece is connected to the upper cylinder piece via an inner collar-shaped shoulder piece, a through hole is formed in the upper part of the lower cylinder piece, a second check valve portion is assembled and fixed inside, and the upper end of the upper cylinder piece is fixed. The top plate portion is provided in a row.
[0021]
In the above-described configuration of the third aspect, the outer cylinder is formed of the lower cylinder piece and the upper cylinder piece, the lower end portion of the lower cylinder piece is tightly fitted to the shoulder portion of the container body, and the upper cylinder piece is attached to the mouth portion. It is the structure to fit, and it becomes possible to hold | maintain the required sealing performance more reliably while strengthening the assembly fixing to the container main body of a cap body.
[0022]
According to a fourth aspect of the present invention, in the third aspect of the present invention, the cylindrical hanging cylinder piece is suspended from the lower surface of the shoulder piece, and the second check valve is provided at the lower end of the cylindrical outer fitting cylinder piece. An inner flange-shaped inner flange piece is continuously provided, and a tapered tubular second valve body whose diameter is expanded downward is provided so as to be deformable inwardly from the upper end. The second check valve portion is assembled and fixed to the outer cylinder in a state of tightly fitting to the drooping cylinder piece and the outer peripheral end of the second valve body being in close contact with the inner peripheral surface of the lower cylinder piece. .
[0023]
The above-mentioned configuration according to claim 4 mainly relates to the structure of the second check valve portion and the method of fixing the assembly, and the outer fitting cylinder piece is fitted to the drooping cylinder piece so that the second check valve portion is externally provided. The second check valve can be easily set in an appropriate position even in a small container, and the outer peripheral end of the tapered tubular second valve body is the outer cylinder in this assembled state. It is possible to exert a sufficient function as a check valve by closely contacting the inner peripheral surface of the valve.
[0024]
According to a fifth aspect of the present invention, in the first, second, third, or fourth aspect of the invention, the contents are eye drops.
[0025]
According to the above configuration of the present invention, foreign substances such as external air germs or dust can be prevented from entering the container main body, and thus an eye drop dispensing container excellent in hygiene and safety is provided. be able to.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1-6 shows one Example of the extraction | pouring container of this invention, and is comprised from the container main body 1, the cap body 11, the 1st non-return valve part 31, and the 2nd non-return valve part 35. FIG.
[0027]
The container body 1 is a laminated container formed by blow molding, which is formed of an outer layer 2 that can be squeezed and deformable by pressing, and a volume-reducible deformable inner layer 3 that is peelably laminated on the outer layer 2. However, this releasability can be achieved by using resins having low compatibility with each other, for example, by forming the outer layer 2 from a polypropylene resin and the inner layer 3 from a nylon resin.
[0028]
In addition, the container body 1 has a short cylindrical mouth 4 formed on the trunk portion 7 via a shoulder portion 8 having a locking projection 8a around it. A slit 10 that functions as an intake portion 5 as an entrance of outside air into the gap 6 between the outer layer 2 and the inner layer 3 is formed (see FIGS. 2, 3, and 4), and the outer peripheral surface of the upper end portion will be described later. A plurality of vertical grooves 4a into which the vertical ridges 14a attached to the inner surface of the upper cylindrical piece 14 are fitted are engraved. (See Figure 2)
[0029]
Here, the slit 10 is formed in the die cut-out portion 44, and this die cut-out portion 44 blow-molds a part of the portion formed in the mouth portion 4 of the container body 1 of the parison 44 before blow molding. It is a part that is sandwiched from both sides with a split mold 45 that is a mold and is bitten, but in a state where the inner layer 3 is overlapped, the laminate of the outer layer 2 and the inner layer 3 is cut while being crushed (see FIG. 7). The cut end face has a sandwich shape in which the inner layer 3 is sandwiched between the outer layers 2 on both sides (see FIG. 4A), and the outer layer 2 and the inner layer 3 are separated while being separated to form a gap 6 between the outer layer 2 and the inner layer 3. It is possible to easily form the slit 10 that functions as the intake section 5 for introducing external air (see FIG. 4B).
[0030]
The outer cylinder 12 of the cap body 11 has a lower cylinder piece 13 whose lower end is tightly fitted to the shoulder 5 and an upper cylinder piece 14 which is fitted outside while forming a gap in the mouth 4 via the shoulder piece 15. The top plate portion 21 is connected to the upper end of the upper tube piece 14 so as to cover the opening of the mouth portion 4, and the top plate portion 21 is connected to the upper end of the upper tube piece 14. The top plate 21a and the tip tube piece 23 having the pouring tip port 23a are erected on the top of the top plate 21a formed on the periphery of the spout 22 formed in the center portion of the top plate 21a, and the seal tube piece 24 is suspended. It is formed.
[0031]
In addition, a drooping cylinder piece 16 is provided at the end of the shoulder piece 15 by extending the upper cylinder piece 14 downward, and the vertical groove 4a of the mouth 4 is formed at the upper part of the inner peripheral surface of the upper cylinder piece 14. A vertical protrusion 14a that is fitted to the inner peripheral surface of the lower cylinder piece 13 is formed in the vicinity of the upper end portion of the inner peripheral surface of the lower cylinder piece 13, and the shoulder portion 8 of the container body 1 is provided at the lower end portion thereof. A seal peripheral strip 13a is provided around the locking projection 8a so as to be in a sealed state.
[0032]
The cap body 11 is configured as described above, and the seal circumferential strip 13a of the lower cylinder piece 13 is locked to the locking projection 8a of the shoulder portion 8 while maintaining the sealing property, and the vertical projection of the upper cylinder piece 14 is secured. 14a is fitted into the vertical groove 4a of the mouth part 4, the lower surface of the top plate 21a is brought into contact with the upper end face of the mouth part 4, and the seal cylinder piece 24 is closely fitted into the upper end part of the mouth part 4, The main body 1 is firmly fixed without being pivotable and without coming off the upper part, and the slit 10 (intake part 5) and the through hole 18 are communicated in a sealed state.
[0033]
The first check valve portion 31 is formed by forming a cross-shaped slit valve piece 32 a on the top of the top-like cylindrical slit valve body 32 (see FIG. 5). The top plate portion 21 is assembled and fixed in a state where it is closely fitted from below and the lower end is locked to the locking piece 24a of the seal cylinder piece 24.
[0034]
The second check valve portion 35 is provided with an inner flange-shaped inner flange peripheral piece 37 connected to the lower end of the cylindrical outer fitting cylinder piece 36, and the diameter of the second check valve section 35 is expanded downward so that it can be deformed inwardly from the upper end. The tapered second tubular valve body 35a is suspended, and the outer peripheral end of the second valve body 35a is fitted to the inner circumferential surface of the lower tubular piece 13 by tightly fitting the suspended tubular piece 16 from below. It is assembled and fixed to the outer cylinder 12 in a state of close contact.
[0035]
Here, the first check valve portion 31 and the second check valve portion 35 function as a check valve, and in order to sufficiently exhibit the sealing performance with the tip tube piece 23 or the hanging tube piece 16 or the like, It is made of soft synthetic resin.
[0036]
Next, the assembly of the container body 1, the cap body 11, the first check valve portion 31, and the second check valve portion 35 described above is performed by first inserting the slit valve body 32 into the distal end tubular piece 23, and the outer fitting tube. The first check valve portion 31 and the second check valve portion 35 are assembled and fixed to the cap body 11 by tightly fitting the piece 36 to the hanging cylinder piece 16, and the cap body 11 is attached to the container body 1. Fix with fittings.
[0037]
Normally, when the dispensing container of this embodiment is not used, the overcap 41 is stored by being screwed to the upper cylinder piece 14 as shown in FIG.
[0038]
When the body portion 7 of the container body 1 is pressed from the assembled state described above, the slit valve piece 32a of the first check valve portion 31 is pushed upward to open, and the contents are exposed to the outside from the dispensing tip port 23a at the tip. Be poured out.
[0039]
When the pressure is released from the above-mentioned pouring state, the pouring of the contents stops, the outer layer 2 begins to recover to its original shape by an elastic recovery force, and the slit valve piece 32a is closed, thereby serving as a check valve. This can prevent the backflow of contents into the container body 1 and the entry of external air.
[0040]
At this time, since the inner layer 3 remains in the reduced volume deformed state, the outside air is introduced from the through hole 18 and the second valve body 35a is deformed inwardly, while the slit 10 (intake part 5). Are introduced into the gap 6 between the outer shell layer 2 and the inner layer 3, and as a result, the inner layer 3 remains in a reduced volume deformed shape, and the outer layer 2 is restored to its original shape.
[0041]
When the outer layer 2 is restored to its original shape and pressed again to pour out the contents, the through-hole 18 and the slit 10 (the intake portion 5) are brought about by the check function of the second check valve portion 35. In the container body 1, the air in the gap 6 between the outer layer 2 and the inner layer 3 is sealed, pressure is applied to the contents, the contents open the slit valve piece 32a, and the dispensing destination It is poured out from the end opening 23a.
[0042]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be obtained.
According to the first aspect of the present invention, it is possible to provide a sanitary superior dispensing container that does not impair external air into the container body without impairing the dispensing operability by pressing.
[0043]
By forming the air intake part, which is difficult with a small container, with the die cutting part of the mouth part, there is no need for post-processing, and the manufacturing cost can be kept low, providing a dispensing container that does not impair the appearance. it can.
[0044]
In the invention according to claim 2, the first check valve portion can be easily formed by adopting a simple structure in which the slit valve piece is formed at the top portion, and even if it is a small container, Positioning and incorporation into the container can be easily achieved.
[0045]
In the invention described in claim 3, by forming the outer cylinder from the lower cylinder piece and the upper cylinder piece, the fixing of the cap body to the container body can be strengthened and the required sealing performance can be obtained. It can be held more reliably.
[0046]
In the invention according to claim 4, even in a small container, the second check valve can be easily set at an appropriate position, and can be easily incorporated into the container, so that the function as a check valve can be sufficiently exerted. be able to.
[0047]
In the invention described in claim 5, since it is possible to prevent foreign matter such as external air germs or dust from entering the container body, an eye drop dispensing container excellent in hygiene and safety can be provided. Can be provided.
[Brief description of the drawings]
FIG. 1 is a half longitudinal side view showing an embodiment of a dispensing container of the present invention.
FIG. 2 is a perspective view showing a container body of one embodiment of the dispensing container of the present invention.
FIG. 3 is a plan sectional view taken along line AA in FIG. 1;
FIG. 4 is an enlarged plan sectional view of a main part showing a slit (intake part) in FIG. 3;
FIG. 5 is a perspective view showing a first check valve portion of one embodiment of the dispensing container of the present invention.
FIG. 6 is a half longitudinal side view showing an embodiment of the dispensing container of the present invention with an overcap.
FIG. 7 is an explanatory view showing a state in which a die cut-out portion of a mouth portion is formed in a plane sectional view in blow molding of a container main body of an embodiment of the dispensing container of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1; Container body 2; Outer layer 3; Inner layer 4; Mouth part 4a; Longitudinal groove 5; Intake part 6; Gap 7; Body part 8; Shoulder part 8a; Locking protrusion 10; Slit 11; 13; lower cylinder piece 13a; seal circumference 14; upper cylinder piece 14a; vertical protrusion 15; shoulder piece 16; drooping cylinder piece 18; through hole 21; top plate portion 21a; top plate 22; Discharge tip 24; Seal cylinder piece 24a; Locking piece 31; First check valve part 32; Slit valve body 32a; Slit valve piece 35; Second check valve part 35a; Second valve body 36; Tube piece 37; Inner collar piece 41; Overcap 44; Parison 45; Split mold 46;

Claims (5)

A squeeze deformable and reversible flexible outer layer (2) on the inner surface of the outer layer (2), the inner layer (3) that can be peeled off and reduced in volume, and is formed into a cylindrical mouth The container body (1) with the slit (10) formed in the vertical direction in the die cutting part of (4) as the intake part (5) and the inner peripheral surface of the lower end part are tightly sealed to the container body (1). In a state of being in circumferential contact, the container body (1) has a cylindrical outer cylinder (12) that is externally fitted to the upper portion of the container body (1) and has a through hole (18) for taking in external air. A top plate portion (21) covering the opening of the mouth portion (4) at the upper end of 12), and a cap body (11) in which a spout (22) is formed at the center of the top plate portion (21); The top plate portion (21) is assembled and fixed with a first check valve portion (31) that opens and closes the spout (22) so that the backflow of contents into the container body (1) and the inflow of outside air cannot be performed. A second check valve part (35) for opening and closing the through hole (18) is assembled and fixed to the outer cylinder (12), and the container book In a state where the (1) and the cap body (11) are assembled, the through hole (18) and the intake portion (5) are communicated in a sealed state via the second check valve (35). Dispensing container. The dispensing container according to claim 1, wherein the first check valve portion (31) is a slit valve body (32) made of soft resin and having a cylindrical shape with a slit valve piece (32 a) formed on the top portion. A cylindrical lower tube piece (13) whose lower end portion is tightly fitted to the shoulder (8) of the container body (1) and an upper tube piece (14) that is fitted to the mouth portion (4). ) Are connected through an inner collar-shaped shoulder piece (15), a through hole (18) is formed in the upper part of the lower cylinder piece (13), and a second check valve part (35) is formed inside. The pouring container according to claim 1 or 2, wherein the top plate portion (21) is connected and fixed to the upper end of the upper cylindrical piece (14). A cylindrical drooping cylinder piece (16) is suspended from the lower surface of the shoulder piece (15), and the second check valve part (35) is attached to the lower end of the cylindrical outer fitting cylinder piece (36). The outer fitting cylinder has a configuration in which a tapered valve-like second valve body (35a) is provided in a suspended manner by continuously providing a flange piece (37) and expanding downward from the upper end so as to be deformable inwardly. With the piece (36) tightly fitted over the drooping cylinder piece (16) and the outer peripheral end of the second valve body (35a) in close contact with the inner peripheral surface of the lower cylinder piece (13), the second reverse The dispensing container according to claim 3, wherein the stop valve portion (35) is assembled and fixed to the outer cylinder (12). The dispensing container according to claim 1, 2, 3, or 4, wherein the contents are eye drops.

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