JP3994145B2 - Dispensing container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a squeeze-deformable external container, wherein the deflated and deformable internal container is detachably laminated, and the contents can be repeatedly dispensed without sucking outside air. Regarding the dispensing container.
[0002]
[Prior art]
Japanese Utility Model Laid-Open No. 57-44063 and Japanese Utility Model Laid-Open No. 7-22951 have a description of the prior art regarding a squeeze-type dispensing container comprising an internal container and an external container containing the internal container.
[0003]
In the prior art described in Japanese Utility Model Publication No. 57-44063, a vent hole is provided in the bottom of the container body, and after the internal mayonnaise is poured out by squeezing the container body, External air is introduced into the container, the inner container retains its deformed shape, and the container body is restored to its original shape by its restoring force.
[0004]
In the prior art described in Japanese Utility Model Publication No. 7-22951, the outer container and the inner container are coupled and fixed, and the passage of the contents from the inner container is allowed, but the entry of the outside air into the contents is prevented. There is a second check valve that allows outside air to pass between the check valve, the external container, and the internal container, but prevents the outside air from entering between the external container and the internal container. It has a configuration.
[0005]
In addition, by providing a pair of longitudinal belt-like adhesive bands that adhere and fix the outer container and the inner container over the entire height range of the container body, the inner container is prevented from being shrunk and deformed in the height direction. In general, a method of restricting the shape and securing the flow passage of the contents to make the dispensing operation smooth is also generally used.
[0006]
[Problems to be solved by the invention]
However, in order to exhibit the function of the adhesive band as described above, a method of arranging a pair of adhesive bands in an axially symmetric position with respect to the central axis of the trunk is simple and effective. If the width is too wide, the internal structure will not be sufficiently deformed, and if it is too narrow, the flow path of the contents will be blocked by the warping deformation at an early stage. , There is a problem that the smooth dispensing operation cannot be performed and the amount of contents left over is increased.
[0007]
Therefore, the present invention was devised to solve the above-described problems in the prior art, and the dispensing operation can be smoothly performed to the end, and the remaining amount of the contents can be reduced. The aim is to provide a squeeze-type dispensing container.
[0008]
[Means for Solving the Problems]
Among the means of the present invention for solving the above technical problem, the means of the present invention described in claim 1 is an external device for forming a peelable, squeeze-deformable, externally flexible outer container. Consists of a shell layer and an inner layer that accommodates the contents inside and forms an inner volume that can be deformed and deformed inwardly by being reduced in internal pressure. Having a blow-molded box-shaped container body having a body section of a flat cross-sectional shape having a major axis and a minor axis that are virtual axes;
Having an extraction cap body that has an opening and is fitted to the mouth of the container body;
A pair of vertical belt-shaped adhesive bands are formed at the position of the container body trunk in the major axis direction, with the outer shell layer and the inner layer bonded to each other over the entire height range of the container body, symmetrically about the central axis of the trunk. To do,
The width of the adhesive band is in the range of 0.8 (1/4) (L-2D1) to 1.2 (1/4) (L-2D1),
Desirably, it is set to (1/4) (L-2D1) (where D1 is the long diameter of the trunk flat section, L is the circumference of the trunk flat section),
The dispensing cap body is provided with a first check function portion having a function of preventing the backflow of contents from the opening portion to the internal container and the inflow of external air, and the outer container includes an outer shell layer and an inner layer. Opening an outside air introduction part for introducing outside air between the layers, and connecting the outside air introduction part to a second check function part having a function of sealing the interlayer air during squeeze,
It is in.
[0009]
In the invention of claim 1, after the content is poured out by squeezing the container body, the squeeze is stopped and the pressing force is released. Then, the external body begins to be restored to its original shape by the elastic recovery force, Due to the function of the first check function part provided on the dispensing cap body, the dispensing of the contents stops, the back flow of the contents and the inflow of outside air to the internal container are stopped, and the internal container is in a deformed and deformed state. Since it is kept, external air is introduced from the outside air introduction portion between the outer shell layer and the inner layer, and the outer container is restored to its original shape.
[0010]
When the outer container is restored to its original shape and then squeezed again, the air between the layers is sealed by the second check function part, so this air is pressurized and pressure is applied to the inner container. Things are poured out.
[0011]
The first non-return function unit prevents the outside air from flowing into the internal container, so that no air can be trapped in the internal container, and therefore the contents are always located facing the opening. Regardless of the posture of the dispensing container, the contents can be easily and quickly poured out, and problems such as decomposition of the contents and oxidative deterioration due to air can be prevented.
[0012]
By forming the vertical band-shaped adhesive band, a pair of unbonded inner layer portions (hereinafter referred to as inner layer non-bonded portions) are formed symmetrically with respect to the major axis, but the progress of the content extraction by the above squeeze operation Therefore, looking at the progress of deformation of the inner non-adhered part in the plane cross section of the trunk part, first, the central part of the left and right inner layer non-adhered parts is deformed in the flat direction, and this deformation progresses, approximately on the major axis. Further, the contact portion extends on a substantially long axis toward the portion where the adhesive band is located, and the atrophy deformation progresses in a form that is ideally symmetrical with respect to the long and short axes.
[0013]
Furthermore, when the contents are poured out and the warping and deformation progresses, the contact part extends over the long axis and the flat cross-sectional shape is almost completely crushed with the contents almost gone. Here, when the length of the inner layer non-bonded portion is set to be equal to the sum of the long diameter of the trunk flat section and the width of the adhesive band, that is, the width of the adhesive band is set to be equal to (1/4) (L-2D1). Simultaneously with the completion of the dispensing of the contents, the inner container is in a substantially completely crushed state as described above.
[0014]
However, depending on the state of use, the inner layer non-adhered portion withering deformation does not proceed symmetrically with respect to the major axis and minor axis as described above, and when some asymmetry or partial slack occurs, In such a case, the width of the adhesive band is set slightly narrower than (1/4) (L-2D1). Is preferred.
[0015]
In addition, depending on the purpose of use, such as when the viscosity of the contents is high, the width of the adhesive band is set to (1/4) in order to ensure a large flow passage and to ensure that the contents are smoothly poured out. ) It may be preferable to set a little wider than (L-2D1).
[0016]
As a result of various tests according to the use state and the purpose of use as described above, the width of the adhesive band was changed from 0.8 (1/4) (L-2D1) to 1.2 (1/4) (L-2D1). It has been found that a good result can be obtained that the remaining amount of the contents after use can be made extremely small and the pouring operation can be made smooth to the end.
[0017]
If the width of the adhesive band is set to be larger than 1.2 (1/4) (L-2D1), it will be deformed due to the dimensional limit of the length of the inner non-adhered portion with a large amount of contents remaining. There are almost no possible parts, so at the four ends of the adhesive band in the width direction (hereinafter referred to as adhesive ends), the non-adhered inner layer is supported in a stretched state so as to be hard to deform. Therefore, even if the external container is pressed by hand, it is difficult to pour out the contents.
[0018]
In addition, if the width of the adhesive band is set to be smaller than 0.8 (1/4) (L-2D1), there is a sufficient margin in the length of the inner non-adhered portion, so that a large amount of contents remain as the entire container. Even when the container is in a state where the contents are likely to be reduced due to the state of the container being poured or stored, the flat cross-sectional shape of the inner container will almost clog the flow path. It becomes impossible to carry out the smooth dispensing.
[0019]
The means of the invention of claim 2 is that, in the invention of claim 1, the flat cross-sectional shape of the body portion is a circular shape in which the major axis and the minor axis are equal.
According to the configuration of claim 2, the remaining amount of the contents can be reduced while stably maintaining good pouring operability even with respect to a container having a circular cross section of the trunk part. Since the stroke of squeeze deformation for material extraction can be increased, a large amount of contents can be extracted by a single extraction operation.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 to FIG. 6 show an embodiment of a dispensing container according to the present invention. The container body 1 is made of nylon having no compatibility between the outer shell layer 5 made of a low density polyethylene resin and the low density polyethylene resin. It is composed of an inner layer 6 made of a resin and an adhesive band 9 made of an adhesive resin that exhibits sufficient adhesion to a low density polyethylene resin and a nylon resin.
[0022]
The container body 1 includes a bottom portion 4, a trunk portion 2 that is connected to the bottom portion 4, and has an elliptical cross-sectional shape, and is erected on the upper end of the barrel portion 2 to engrave a thread on the outer peripheral surface. It is in the shape of a casing made up of a cylindrical mouth portion 3 provided.
[0023]
The container body 1 has a height of 160 mm, the trunk section 2 whose elliptical cross-sectional shape is elliptical, the major axis D1 is 70 mm, and the minor axis is 40 mm (both are shown by the inner diameter).
[0024]
The outer layer 5 and the inner layer 6 constituting the container body 1 are laminated so as to be peeled except for a portion that is bonded and fixed by an adhesive band 9, and the outer shell layer 5 has sufficient mechanical strength and squeeze deformation. The inner layer 6 forms a thin-walled inner container 13 that can be sufficiently deflated and can be deformed inside the outer container 12.
[0025]
FIG. 2 shows a plan sectional view of the body 2, and an adhesive band 9 for bonding and fixing the outer shell layer 5 and the inner layer 6 is positioned at the position of the major axis 10 direction of the elliptical planar section of the body 2. A pair of axisymmetric about the central axis of the body 2 is formed over the entire height range of the container body 1. In this embodiment, the circumferential length L of the body is 176 mm, and the width La of the adhesive band is (1 / 4) Calculated according to (L-2D1) to be 9 mm, and the length Lna of the inner layer non-adhered portion is 79 mm.
[0026]
As shown in FIGS. 4 and 5, the blow molding of the container body 1 is performed between the outer cylinder 17, the inner cylinder 16 positioned inside the outer cylinder 17, and between the outer cylinder 17 and the inner cylinder 16. A pair of belt-like adhesive bodies 9 positioned symmetrically with respect to the axis are co-extruded to form a parison 15, and the parison 15 is formed on the container body 1 using a blow molding split mold.
[0027]
In the cylindrical mouth portion 3 in which a thread is engraved on the outer peripheral surface, the outside air introduction hole 8a constituting the outside air introduction portion 8 is axisymmetric at a position 90 ° from the adhesive band 9 with respect to the central axis of the container body 1. A pair has been established (see FIG. 3).
[0028]
The dispensing cap body 20 has a top wall having an opening 23 at the center, and has a top cylindrical shape in which a thread for engaging with the mouth 3 of the container body 1 is engraved on the inner peripheral surface. The cap main body 21 and a pouring cylinder 27 standing upright at the opening edge of the opening 23 on the top wall of the cap main body 21, and the contents from the spout 22 at the tip of the pouring cylinder 27. The configuration is such that an object is poured out, and the spout 22 is covered with a cover cap 29.
[0029]
The dispensing cap body 20 is assembled to the mouth portion 3 of the container main body 1 by screwing, and a seal cylinder piece 28 suspended from the lower surface of the top wall of the cap main body 21 and the inner peripheral surface of the cylindrical wall of the cap main body 21. The seal portion 24 attached to the lower end is in close contact with the upper end of the inner peripheral surface and the lower end of the outer peripheral surface of the mouth portion 3 of the container main body 1, and is tightly assembled to the container main body 1.
[0030]
Further, the dispensing cap body 20 normally closes the opening portion 23 by installing the first check function portion 25 having the first check valve 25a in the opening portion 23 of the cap body 21. When the contents 7 are poured out by squeezing the container body 1 to exhibit a check function that prevents the intrusion of external air, the function opens the opening 23 by the internal pressure of the internal container 13. Let
[0031]
Further, the dispensing cap body 20 has a second check function portion 26 that constitutes the second check function portion 26 at a position that matches the position of the outside air introduction hole 8 a provided in the mouth portion 3 on the cylindrical wall of the cap body 21. A valve 26a is provided, and the second check valve 26a is opened between the outer container 12 and the inner container 13, that is, when the air pressure in the interlayer 6d is lower than the outside air, and opens to the outside air introduction hole 8a. Through the outer shell layer 5 and the inner layer 6, and when the air pressure in the interlayer 6d becomes equal to the external air pressure, it closes and has a check function that does not let the air escape to the outside.
[0032]
Next, the usage state of the dispensing container according to the above embodiment will be described.
In the pouring container configured as described above, when the container body 1 is squeezed, the second check valve 26a is closed, and the pressure in the internal container 13 containing the contents 7 rises, and the first The check valve 25a is opened, and the contents 7 are poured out from the spout 22 at the tip of the dispensing cap body 20, and the internal container 13 is reduced in volume in a deflated form as the contents 7 are reduced. To do.
[0033]
Thereafter, when the squeeze of the container body 1 is stopped and the pressure on the body 2 is released, the outer container 12 starts to recover to its original shape by the elastic recovery force, and the air between the outer container 12 and the inner container 13 is decompressed. As a result, the internal pressure of the internal container 13 returns to the external pressure, the first check valve 25a is closed, and the dispensing of the contents 7 is stopped.
[0034]
When the outer container 12 is further restored to its original shape, the first check valve 25a is closed, so that the inner container 13 maintains a deflated shape, so that the pressure in the interlayer 6d is lower than the external pressure. Therefore, the second check valve 26a is opened, the outside air is restored to the interlayer 6d between the outer shell layer 5 and the inner layer 6 through the outside air introduction hole 8a, the outer container 12 is restored to the original shape, and the outer container Until the pressure of the air between 12 and the internal container 13 becomes equal to the outside, the outer shell layer 5 and the inner layer 6 are sucked while being peeled off, and the second check valve 26a is closed simultaneously with the completion of the suction.
[0035]
When the container body 1 is squeezed again, the second check valve 26a remains closed, so that the pressure due to the squeeze is transmitted to the internal container 13 via the air between the external container 12 and the internal container 13, The internal pressure of the container 13 rises, the first check valve 25a opens, the contents 7 are poured out from the spout 22, and the volume of the internal container 13 is further reduced.
[0036]
When the squeeze of the container body 1 is stopped and the pressing is released, the above-described operation is repeated, and the contents 7 are poured out to the end by repeating this pouring operation.
[0037]
FIG. 6 is a plan sectional view of the trunk portion 2 of the dispensing container of the present embodiment, and is an explanatory view showing the transition of deformation of the internal container 13 (inner layer 6). FIG. It is explanatory drawing which each showed the deformation | transformation form of the internal container 13 (inner layer 6) in the plane cross section of the trunk | drum 2 of the width | variety large and small.
[0038]
When the ideal progress of the wrinkle deformation of the inner layer non-adhering portions 6a and 6b according to the content 7 is poured out, the inner layer non-adhering portion divided into the left and right by the adhesive band 9 first. The central portions 6a1 and 6b1 of 6a and 6b are deformed and displaced in the flat direction, and this deformation progresses and comes into contact with the substantially long axis 10, and further, the contact portion 6c is directed toward the portion where the adhesive band 9 is located. While extending on the substantially long axis 10, the wilt and deformation progresses.
[0039]
In this state, the flow passage 7a is secured in the vicinity of the adhesive band 9, but the contact portion 6c extends over the long shaft 10 in a state where the content 7 is further poured out and the content 7 is almost lost. Then, the flat cross-sectional shape is almost completely crushed (the state shown in FIG. 7A).
[0040]
If the width La of the adhesive band 9 is made too large, that is, La> 1.2 (1/4) (L-2D1), it can be deformed due to the dimensional limit of the length Lna of the inner non-bonded portions 6a, 6b. Since the inner portion non-adhesive portions 6a and 6b are deflated and supported in a stretched state so as not to be deformed by the four adhesive end portions 9a1, 9a2, 9b1, and 9b2, the external container 12 is Even if it is pressed by hand, it becomes difficult to pour out the contents 7 (state shown in FIG. 7B).
[0041]
On the other hand, if the width La of the adhesive band is too narrow, that is, La <0.8 (1/4) (L-2D1), there is a dimensional margin in the length Lna of the inner non-bonded portions 6a and 6b. Because there is enough, even if the contents 7 still remain in the container as a whole, depending on the state of use, the flow path is almost blocked at the portion of the flat cross-sectional shape in which the contents 7 tend to decrease in the container. (State of FIG. 7C).
[0042]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be obtained.
By restricting the shape of the inner container in the height direction with respect to deformation and securing the content extraction passage, by setting the width of the adhesive band to an appropriate range for any container body, The squeeze-type dispensing container can be provided in which the dispensing operation is smooth to the end and the remaining amount of the contents after use is extremely small.
[Brief description of the drawings]
FIG. 1 is a half longitudinal side view showing an embodiment of a dispensing container of the present invention.
2 is a plan sectional view taken along the line AA of the embodiment shown in FIG. 1. FIG.
FIG. 3 is an enlarged half vertical sectional side view of the main part of the embodiment shown in FIG. 1;
FIG. 4 is a front view showing an embodiment of a parison that is blow-molded in the container body of the present invention.
5 is a cross-sectional plan view of the embodiment of the parison shown in FIG. 4 along the line BB. FIG.
6 is an explanatory view showing the transition of the deformation of the internal container in the plane sectional view shown in FIG. 2 in one embodiment of the dispensing container of the present invention. FIG.
FIG. 7 is an explanatory view showing the deformation of the internal container in the plane cross section shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1; Container body 2: Body part 3; Mouth part 4; Bottom part 5; Outer shell layer 6; Inner layer 6a; Inner layer non-adhesion part 6a1; Center part 6b; Inner layer non-adhesion part 6b1; Center part 6c; 7; Contents 7a; Flow path 8; Outside air introduction part 8a; Outside air introduction hole 9; Adhesive band 9a1; Adhesive end part 9a2; Adhesive end part 9b1; Adhesive end part 9b2; Adhesive end part 10; Long axis 11; 12; external container 13; internal container 15; parison 16; inner cylinder 17; outer cylinder 20; pouring cap body 21; cap body 22; spout 23; opening 24; seal part 25; 1st check valve 26; 2nd check function part 26a; 2nd check valve 27; Extraction cylinder 28; Seal cylinder piece 29; Cover cap D1; Long diameter La; Width Lna;

Claims (2)

The outer shell layer (5) that forms a squeeze-deformable and flexible outer container (12) that is laminated in a peelable manner and the contents (7) are accommodated therein, and the internal pressure is reduced. It is composed of an inner layer (6) that forms an internal body (13) that is reduced inward and deformable by reduction, and is deformed and deformed. 10) and a blow-molded container body (1) having a body (2) having a flat cross-sectional shape with a short axis (11), and an opening (23), the container body (1 ) And a pouring cap body (20) fitted to the mouth part (3), in the position of the longitudinal direction (10) of the trunk part (2), with respect to the central axis of the trunk part (2) Axially symmetrically forming a pair of vertical belt-like adhesive bands (9) for bonding the outer shell layer (5) and the inner layer (6) over substantially the entire height range of the container body (1), The width (La) of (9)
0.8 (1/4) (L-2D1) to 1.2 (1/4) (L-2D1),
Desirably (1/4) (L-2D1)
(However, D1: long diameter of the body section (2) flat section, L: circumference of the body section (2) flat section), and the pouring cap body (20) from the opening section (23) A first check function part (25) having a function of preventing the backflow of the contents (7) and the inflow of external air to the internal container (13) is provided, and the outer shell layer is provided on the external container (12). (5) Establishing an outside air introduction part (8) for introducing external air into the interlayer (6d) between the inner layer (6) and the outside air introduction part (8), the air of the interlayer (6d) during squeezing A pouring container configured to be connected to a second check function part having a function of sealing the. The pouring container according to claim 1, wherein the trunk section (2) has a circular cross-sectional shape with a major axis and a minor axis equal to each other.

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