JP6848444B2 - Spout plug and packaging container - Google Patents

Description

The present invention relates to a spout plug and a packaging container.

A technique is known in which a check valve is provided at the inlet of a packaging container for products such as beverages, liquid seasonings, and cosmetics to prevent outside air from entering the container after pushing out the stored liquid from the elastic container. (See Patent Document 1).

In Patent Document 2, a valve seat provided with a guide hole in a tubular injection cylinder, and at least the guide hole and its vicinity are covered in contact with one surface of the valve seat, and the guide hole is provided with an arc-shaped notch. Disclosed are a spout plug having a check valve structure having a valve body formed so as to be openable and closable, and a packaging container provided with the spout plug.

Japanese Unexamined Patent Publication No. 2001-301779 JP-A-2015-224042

The valve body disclosed in Patent Document 2 is connected to the check valve body at a connecting portion in which a notch is not formed. Therefore, if the content liquid is to be poured out from the packaging container in a posture in which the connecting portion is located downward, the valve body may be greatly opened to the outside of the packaging container due to the discharged content liquid. In such a case, since a large amount of the content liquid is poured out from the widely opened valve body at one time, it may be difficult to pour out the content liquid while adjusting the content liquid in a small amount. Further, there is a problem that when the valve body opens wide to the outside, the valve body comes into contact with the end portion of the pouring cylinder, and the liquid drainage property of the pouring cylinder is deteriorated. Further, when the valve body comes into contact with the dispensing cylinder, the valve body sticks to the dispensing cylinder, and there is a problem that the valve body cannot be closed even after the content liquid has been poured out.

The present invention has been made in view of such a problem, and is a spout / outlet plug provided with a check valve structure capable of stably pouring the content liquid regardless of the posture of the container body at the time of pouring. And the purpose is to provide a packaging container equipped with this.

One aspect of the present invention for solving the above problems is a spout / outlet plug that is attached to the container body and capable of pouring out the content liquid contained in the container body, and has a cylindrical pouring cylinder and a circular shape in the center. A first ring plate provided on the inner surface of the pouring cylinder, a valve body plate capable of closing the communication hole from the pouring outlet side of the pouring cylinder, and an inner surface of the pouring cylinder. It has a plurality of ribs provided in the circumferential direction on the spout side of the first ring plate and a circular communication hole in the center, and is the inner surface of the spout cylinder on the spout side of the rib. The valve body plate is provided with a second ring provided, and is not connected to either the first ring plate or the rib, and is between a state in which the communication hole of the first ring plate is closed and a state in which the communication hole is not closed. The ribs are movable from the position of the first ring plate, and the ribs are projected from the inner peripheral surface of the dispenser cylinder from the position of the first ring plate toward the outlet side of the dispenser cylinder. but that having a slope gradually increasing, a spout plug.

Another aspect of the present invention is a packaging container including the container body and the spout plug attached to the container body.

According to the present invention, there is provided a spout plug having a check valve structure capable of stably pouring the content liquid regardless of the posture of the container body at the time of pouring, and a packaging container provided with the check valve plug. be able to.

Cross-sectional view of the spout plug according to the embodiment of the present invention Exploded view of the spout plug according to the embodiment of the present invention Top view and cross-sectional view of the check valve outer shell according to the embodiment of the present invention. Sectional drawing which shows the use state of the spout plug which concerns on one Embodiment of this invention. Sectional drawing which shows the use state of the spout plug which concerns on one Embodiment of this invention. Cross-sectional view of the spout plug according to the embodiment of the present invention

The spout plug 10 according to the embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a cross-sectional view of the spout plug 10 attached to the container body 70 and an enlarged view of part A surrounded by a dotted line. Further, FIG. 2 shows an exploded view of the spout plug 10.

(Outlet plug)
The pouring outlet plug 10 is attached to the container body 70, and the content liquid 80 contained in the container body 70 can be poured out. As shown in FIGS. 1 and 2, the pouring outlet plug 10 includes a pouring cylinder 20, a first ring plate 30, a second ring plate 40, and a check valve outer shell provided on the inner surface of the pouring cylinder 20. Includes 50 and valve body plate 60. On the inner surface of the injection cylinder 20, the first ring plate 30, the check valve outer shell 50, and the second ring plate 40 are arranged in order from the inflow port 20c side, which is the opening through which the content liquid 80 flows from the container body 70. It is provided in. The valve body plate 60 is housed in a space 90 surrounded by a first ring plate 30, a check valve outer shell 50, and a second ring plate 40.

The injection cylinder 20 is a member that accommodates the first ring plate 30, the second ring plate 40, the check valve outer shell 50, and the valve body plate 60 on the inner surface. The pouring cylinder 20 has a cylindrical shape including an inflow port 20c, which is an opening into which the content liquid 80 flows in from the container body 70, and a pouring port 20d, which is an opening for pouring out the content liquid 80. The dispensing cylinder 20 has a screw thread 20a for screwing and attaching a cap (not shown) to the outer peripheral surface. Further, the pouring cylinder 20 has a flange 20b on the outer peripheral surface on the inflow port 20c side for fixing the pouring outlet plug 10 to the container body 70. The method of attaching the cap to the dispensing cylinder 20 is not limited to screwing, and a well-known technique such as fixing with a hinge can be used. Also, the cap does not have to be attached.

The first ring plate 30 allows the content liquid 80 to flow in from the inflow port 20c and regulates the movement of the valve body plate 60 toward the inflow port 20c. The first ring plate 30 is a disk-shaped member, and a circular communication hole 30a through which the content liquid 80 can pass is formed in the center.

The check valve outer shell 50 allows the content liquid 80 to flow from the inflow port 20c to the spout 20d, and regulates the movement of the valve body plate 60 toward the spout 20d. The check valve outer shell 50 includes a cylindrical cylindrical portion 50a that can be inserted into the inner peripheral surface of the dispensing cylinder 20, and a plurality of ribs 50b provided on the inner surface of the cylindrical portion 50a in the circumferential direction.

FIG. 3 shows a plan view of the check valve outer shell 50 and a cross-sectional view cut along the line BB'. As shown in the cross-sectional view of FIG. 3, the rib 50b has a surface of the cylindrical portion 50a that is in contact with the first ring plate 30 (a surface on the inflow port 20c side) and a surface of the cylindrical portion 50a that is in contact with the second ring plate 40 (Note). It has an inclined surface 50c in which the amount of protrusion from the inner peripheral surface of the pouring cylinder 20 gradually increases toward the outlet 20d side surface). In the spout plug 10, as an example, six ribs 50b are formed on the inner peripheral surface of the cylindrical portion 50a at equal intervals in the circumferential direction, but the number of ribs 50b can be set arbitrarily.

The second ring plate 40 allows the content liquid 80 to be poured out to the spout 20d, forms a space 90 together with the check valve outer shell 50 and the first ring plate 30, and fills the space 90 with the content liquid. By accumulating the portions, the valve body plate 60 promotes the closure of the communication hole 30a. Like the first ring plate 30, the second ring plate 40 is also a disk-shaped member, and a circular communication hole 40a through which the content liquid 80 can pass is formed in the center.

The valve body plate 60 can be moved between a state in which the communication hole 30a of the first ring plate 30 is closed and a state in which the communication hole 30a is not closed, and the rib 50b restricts the valve body plate 60 from being separated from the pouring cylinder 20. Functions as a check valve. The valve body plate 60 is a disk-shaped member formed of a thin film material.

As the material of the first ring plate 30, the check valve outer shell 50, and the second ring plate 30, general packaging plastics such as polyethylene, polyethylene terephthalate (PET), polypropylene, and ABS can be used. Further, as the material of the valve body plate 60, a relatively thin and elastic material such as polyethylene terephthalate, high-density polyethylene, polypropylene and the like can be used.

A well-known method such as welding or using an adhesive can be used for attaching the first ring plate 30, the check valve outer shell 50, and the second ring plate 30 to the injection cylinder 20.

(Packaging container)
The packaging container 100 is obtained by attaching the spout plug 10 to the container body 70. The pouring outlet plug 10 can be attached to the container body 70 by welding, for example, the flange 20b of the pouring cylinder 20. The method of attaching the spout plug 100 to the container body 70 is not limited to welding, and a well-known method such as using an adhesive can be used. As the container body 70, a flexible packaging bag whose volume can be easily reduced with the pouring of the content liquid 80 can be preferably used.

(Function of spout plug)
Next, the function of the spout plug 10 as a check valve will be described with reference to FIGS. 1, 4, and 5. Hereinafter, the state in which the communication hole 30 of the first ring plate 30 is closed by the valve body plate 60 is referred to as a state in which the check valve is closed. Further, a state in which the communication hole 30 of the first ring plate 30 is not blocked by the valve body plate 60 is referred to as a state in which the check valve is open. FIG. 1 is a cross-sectional view showing a state in which the check valve is closed. FIG. 4 is a cross-sectional view showing a state in which the check valve is opened and the content liquid is poured out. FIG. 5 is a cross-sectional view showing a state in which the check valve is closed after the pouring of the content liquid 80 is completed. Further, FIGS. 1, 4 and 5 show enlarged views of the portions (A to C) surrounded by the dotted lines, respectively.

When the check valve is closed, as shown in FIG. 1, the valve body plate 60 is in close contact with the surface of the first ring plate 30 on the spout 20d side and closes the communication hole 30a. In this state, the inside of the container body 70 is shielded from the outside air by the valve body plate 60.

When the user of the packaging container 100 tilts the packaging container 100 or presses the container body 70 with the check valve closed, the content liquid 80 communicates with the first ring plate 30 as shown in FIG. The valve body plate 60 is pushed out in the direction of the spout 20c through the hole 30a. As a result, as shown by the white arrow in FIG. 4, the valve body plate 60 is separated from the first ring plate 30 with the contact portion with the rib 50b as a fulcrum, and the communication hole 30a is opened. As a result, the check valve is opened.

After that, the content liquid 80 flowing out of the container body 70 flows into the space 90 surrounded by the first ring plate 30, the check valve outer shell 50, and the second ring plate 40. At this time, the valve body plate 60 is pushed out toward the spout 20d by the content liquid 80, but the movement toward the spout 20d is restricted because it comes into contact with the rib 50b. Therefore, the valve body plate 60 does not separate from the dispensing cylinder 20. Further, since a plurality of ribs 50b are arranged on the inner surface of the check valve outer shell 50, as shown by the black arrow in FIG. 4, the content liquid 80 passes through the outer periphery of the valve body plate 60, and then the ribs 50b of the plurality of ribs 50b. It passes through the space, passes through the communication hole 40a of the second ring plate 40, passes through the spout 20d, and is poured out of the packaging container 100.

In this way, when the check valve is open, the content liquid 80 can be poured out from between the plurality of ribs 50b to the outside of the packaging container 100 regardless of the posture of the valve body plate 60. Therefore, according to the pouring outlet plug 10, the content liquid 80 can be stably poured out regardless of the posture of the packaging container 100 at the time of pouring.

Next, when the user restores the inclination of the packaging container 100 or stops pressing the container body 70, at least a part of the content liquid 80 flowing through the space 90 flows back as shown by the black arrow in FIG. Then, it flows into the container body 70 through the communication hole 30a of the first ring plate 30. At this time, as shown by the white arrow in FIG. 5, the content liquid 80 accumulated in the space 90 moves the valve body plate 60 toward the first ring plate 30. As a result, the valve body plate 60 comes into close contact with the first ring plate 30 and closes the communication hole 30a. At this time, the valve body plate 60 is moved to the communication hole 30a by the content liquid 80 accumulated in the space 90. Therefore, the spout plug 10 can suppress the inflow of outside air into the inside of the container body 70. Further, since the first ring plate 30 and the valve body plate 60 can be brought into close contact with each other by the interfacial tension of the content liquid 80 adhering to their surfaces, the effect of suppressing the inflow of outside air can be further enhanced.

(Dimensions of each part of the spout plug)
In order to obtain the above effects, it is preferable that each part of the spout plug 10 has the following dimensional relationship. FIG. 6 shows a cross-sectional view illustrating the dimensions of each part of the spout plug 10.

The diameter d1 of the valve body plate 60 is smaller than the maximum diameter of the inner circumference of the cylindrical portion 50a of the check valve outer shell 50, and the inner peripheral surface of the cylindrical portion 50a and the inner circumference of the communication hole 30a of the first ring plate 30. It is formed larger than the maximum distance d2 in a plan view with a surface. This is to prevent the valve body plate 60 from being separated from the first ring plate 30 and being separated from the pouring cylinder 10 through the communication hole 30a.

Further, the diameter d1 of the valve body plate 60 is the inflow port 20c side end of the inclined surface 50c and the injection port of the inner peripheral surface of the cylindrical portion 50a sandwiching the central axis in the cross section including the central axis of the injection cylinder 20. It is preferably formed to be larger than the distance d3 from the 20d side end portion. This is to prevent the valve body plate 60 from overcoming the rib 50b and exiting to the spout 20d side when the valve body plate 60 is tilted in the space 90.

Further, it is preferable that the cross section including the central axis of the pouring cylinder 20 is formed so that the acute angle a1 formed by the inclined surface 50c and the direction parallel to the central axis of the pouring cylinder 20 is 45 ° or more. This is to make it difficult for one end of the valve body plate 60 to separate from the first ring plate 30, and to prevent the valve body plate 60 from being caught on the inclined surface 50c even when separated, so that the valve body plate 60 is not easily separated from the inclined surface 50c. 1 This is to facilitate the return to the ring plate 30 and to guarantee the movement as a check valve that opens and closes the communication hole 30a with one end as a fulcrum.

Further, the diameter d4 of the communication hole of the second ring plate is made smaller than the diameter of the valve body plate 60, and is arbitrarily set based on the required pouring speed of the spout plug and the amount of the content liquid 80 stored in the space 90. it can.

(Modification example)
In the pouring outlet plug 10, the rib 50b is provided in the check valve outer shell 50 that is separate from the pouring cylinder 20, and the check valve outer shell 50 is inserted into the pouring cylinder 20. It may be integrally formed so as to project directly from the inner peripheral surface of the injection cylinder 20. Further, the first ring plate 30 and the second ring plate 40 may also be integrally formed on the inner peripheral surface of the dispensing cylinder. Further, the first ring plate 30, the second ring plate 40, the check valve outer shell 50 and the valve body plate 60 may be housed in a cap that closes the injection cylinder 20.

As described above, the valve body plate 60 and the first ring plate 30 can be brought into close contact with each other due to the interfacial tension of the content liquid 80 adhering to the surface. In order to increase the interfacial tension, it is preferable that at least one of the valve body plate 60 and the first ring plate 30 of the content liquid 80 has hydrophilicity on the surface of the member. Specifically, at least one of the valve body plate 60 and the first ring plate 30 can be formed of a hydrophilic member, or the surface of the member can be processed to improve hydrophilicity.

The spout plugs 10 having different dimensions according to Examples 1 to 3 were manufactured and evaluated. The dimensions of each part of the manufactured first ring plate 30, second ring plate 40, check valve outer shell 50, and valve body plate 60 are shown below.

(Example 1)
The outer peripheral diameter of the first ring plate 30 was 16.3 mm, and the diameter of the communication hole 30a was 12 mm. The outer peripheral diameter of the second ring plate 40 was 16.3 mm, and the diameter of the communication hole 40a was 6 mm. The outer diameter of the check valve outer shell 50 was 16.3 mm, the inner diameter was 12 mm, and the thickness was 3 mm. Further, the distance between the ribs 50b facing each other across the central axis of the check valve outer shell 50 was set to 6 mm, and the width of the ribs 50b was set to 1 mm. The diameter of the valve body plate 60 was 10 mm, and the thickness was 100 μm.

(Example 2)
The outer peripheral diameter of the first ring plate 30 was 16.3 mm, and the diameter of the communication hole 30a was 14 mm. The outer peripheral diameter of the second ring plate 40 was 16.3 mm, and the diameter of the communication hole 40a was 8 mm. The outer peripheral diameter of the check valve outer shell 50 was 16.3 mm, the inner peripheral diameter was 14 mm, and the thickness was 3 mm. Further, the distance between the ribs 50b facing each other across the central axis of the check valve outer shell 50 was set to 8 mm, and the width of the ribs 50b was set to 1 mm. The diameter of the valve body plate 60 was 12 mm, and the thickness was 100 μm.

(Example 3)
The outer peripheral diameter of the first ring plate 30 was 16.3 mm, and the diameter of the communication hole 30a was 15 mm. The outer peripheral diameter of the second ring plate 40 was 16.3 mm, and the diameter of the communication hole 40a was 9 mm. The outer diameter of the check valve outer shell 50 was 16.3 mm, the inner diameter was 15 mm, and the thickness was 3 mm. Further, the distance between the ribs 50b facing each other across the central axis of the check valve outer shell 50 was set to 9 mm, and the width of the ribs 50b was set to 1 mm. The diameter of the valve body plate 60 was 13 mm, and the thickness was 100 μm.

PET was used as the material of the first ring plate 30 and the second ring plate 40 of each embodiment, ABS resin was used as the material of the check valve outer shell 50, and PET was used as the material of the valve body plate 60. .. Each of the prepared spout plugs 10 was attached to a flexible packaging bag containing 0.75 liters of water to manufacture a packaging container 100.

(Evaluation 1)
The content liquid 80 was poured out from the pouring outlet plug 10 of the manufactured packaging container 100 in 10 batches, and the pouring speed, whether or not the content liquid 80 could be poured by its own weight, and the presence or absence of inflow of outside air after pouring were evaluated. .. Table 1 shows the evaluation results for the pouring speed.

As shown in Table 1, since the pouring speed increases as the diameters of the communication holes 30a and 40a of the first ring plate 30 and the second ring plate 40 increase, the pouring speed can be controlled by the communication hole diameter. Was confirmed. Further, in any of the examples, it was confirmed that the content liquid 80 can be dispensed by its own weight until the content liquid 80 reaches 50 ml. Further, it was confirmed that the packaging container 100 after the content liquid 80 was poured out was in a compressed state, and there was no inflow of outside air due to the pouring out.

(Evaluation 2)
The manufactured packaging container 100 was left for 1 hour without a cap attached, and the presence or absence of outside air flowing into the container body 70 was evaluated.

No inflow of outside air was confirmed in any of the packaging containers 100, and it was confirmed that the sealed state could be maintained by the spout plug 10.

As described above, in the spout plug 10 according to the embodiment, the space 90 in which the valve body plate 60 is surrounded by the pouring cylinder 10, the first ring plate 30, the check valve outer shell 50, and the second ring plate 40. To be housed in. Therefore, the valve body plate 60 can move between the state in which the communication hole 30a of the first ring plate 30 is closed and the state in which the communication hole 30a is not closed, and the rib 50b restricts the valve body plate 60 from being separated from the pouring cylinder 20. Will be done. As a result, when the content liquid 80 is poured out, the content liquid 80 can be poured out from between the plurality of ribs 50b to the outside of the packaging container 100 regardless of the posture of the valve body plate 60. Further, when the pouring of the content liquid 80 is stopped, the valve body plate 60 is moved to the communication hole 30a by the content liquid 80 accumulated in the space 90, so that the spout plug 10 is the outside air to the inside of the container body 70. Inflow can be suppressed.

Further, since the spout plug 10 uses the content liquid itself for closing the check valve 60, it is possible to prevent the outside air from flowing into the container body 70 and prevent the content liquid 80 from being oxidized for a long period of time. Can be done.

Further, since the valve body plate 60 can be formed of the valve body plate 60 by a member having a small weight such as a film, the spout plug 10 can be opened and closed only by the weight of the content liquid 80, and the content liquid 80 can be easily opened and closed without squeezing. Can be poured out.

Further, the pouring outlet plug 10 can easily change the pouring speed of the content liquid 80 by changing the diameters of the communication holes 30a and 40a of the first ring plate 30 and the second ring plate 40.

Further, since the communication hole 40a can be set large, the pouring speed can be set faster than that of the conventional technique.

Further, since the spout plug 10 has a simple structure, it can be manufactured at low cost.

Further, since the check valve structure can be made relatively thin with respect to the length direction of the spout plug 10, the degree of freedom in designing the mounting location is high.

The present invention can be used as an inlet / outlet plug for various packaging containers. In particular, it can be suitably used for a spout / outlet plug of a flexible packaging container containing a liquid such as cosmetics or food, which is preferably prevented from coming into contact with the outside air.

10 Outlet plug 20 Outlet cylinder 20a Thread 20b Flange 20c Inflow port 20d Outlet 30 1st ring plate 30a Communication hole 40 2nd ring plate 40a Communication hole 50 Check valve outer shell 50a Cylindrical part 50b Rib 50c Inclined surface 60 Valve body plate 70 Container body 80 Contents liquid 90 Space 100 Packaging container

Claims (4)

A spout plug that is attached to the container body and can pour out the content liquid contained in the container body.
Cylindrical dispenser and
A first ring plate having a circular communication hole in the center and provided on the inner surface of the dispensing cylinder,
A valve body plate capable of closing the communication hole from the injection port side of the injection cylinder,
A plurality of ribs provided on the inner surface of the pouring cylinder on the pouring outlet side of the first ring plate in the circumferential direction.
It has a circular communication hole in the center, and is provided with a second ring plate which is an inner surface of the pouring cylinder and is provided on the pouring outlet side of the rib.
The valve body plate is not connected to either the first ring plate or the rib, and can move between a state in which the communication hole of the first ring plate is closed and a state in which the communication hole is not closed. In addition, the rib regulates the withdrawal from the pouring cylinder .
The ribs that have a slope protrusion amount from the pouring cylinder inner peripheral surface from the position of the first ring plate toward the spout side of the pouring cylinder is gradually increased, the spout stopper. Before Symbol slope, the in pouring cylinder section including the center axis of the acute angle formed between the center axis parallel to the direction is 45 ° or more, the spout plug according to claim 1. At least one of the first ring plate and the valve body plate
The spout plug according to claim 1 or 2, which has hydrophilicity on the surface. With the container body
A packaging container including the spout plug according to any one of claims 1 to 3 attached to the container body.

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