JP7090986B2 - Discharge container - Google Patents

Description

The present invention relates to a discharge container having a double-structured container body having an outer layer body and an inner layer body, and a discharge cap attached to the mouth of the container body.

Conventionally, as a container for storing cosmetics such as lotion, shampoo, rinse, liquid soap, food seasoning, chemicals, etc. as contents, a double-structured container body having an outer layer and an inner layer, and a container body. There is known a discharge container provided with a discharge cap attached to the mouth portion of the container and capable of discharging the contents from the discharge port provided in the discharge cap.

An outside air introduction port for introducing outside air between the outer layer body and the inner layer body is provided at the mouth of the container body of such a discharge container, and the inside of the discharge cap is provided from the inside of the inner layer body. A check valve is provided to open and close the flow path of the contents so as to allow the contents to flow out to the discharge port and prevent the contents and the outside air from flowing in from the discharge port to the inside of the inner layer. , When the contents are discharged from the discharge port, the outside air is introduced between the outer layer body and the inner layer body through the outside air introduction port while blocking the inflow of the outside air from the discharge port to the inside of the inner layer body by the check valve. Only the inner layer can be reduced in volume and deformed while maintaining the shape of the outer layer. As a result, the contents contained in the inner layer body are discharged without being replaced with the outside air, making it difficult for the contents remaining inside the inner layer body to come into contact with air, and suppressing deterioration and deterioration thereof. Can be done.

Further, as the discharge container as described above, an undercut engagement type (plugging type) that is easier to cap than a screw-on type discharge cap having a female screw portion that engages with a male screw portion provided on the outer peripheral surface of the mouth portion. ) Is known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2018-1228060

For example, when a polypropylene or polyethylene discharge cap is attached to the mouth of a polyethylene terephthalate container body, or when the container body and the discharge cap are made of different materials, the container body is recycled ( When reusing), it is required to remove the discharge cap from the container body and separate it.

However, since it is difficult to remove the undercut engagement type discharge cap from the mouth as described above, there is a problem that the work of separating the discharge cap when recycling the container body becomes complicated.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a discharge container in which an undercut-engaged discharge cap can be easily removed from a mouth portion. It is in.

The discharge container of the present invention includes a double-structured container body having an outer layer body and a volume-reducing deformable inner layer body housed inside the outer layer body, and having an outside air inlet at the mouth portion, and a top wall portion. A discharge cap which is provided with a cylindrical side wall portion connected to the top wall portion, is attached to the mouth portion, and is provided with a discharge port for contents and a ventilation port for outside air, and is provided inside the discharge cap. An annular mouth portion provided on the outer peripheral surface of the mouth portion below the outside air introduction port, which is a discharge container having a check valve for opening and closing the flow path of the contents toward the discharge port. An annular cap-side seal portion provided on the inner peripheral surface of the side seal portion and the side wall portion, which abuts on the mouth side seal portion over the entire circumference and seals between the side wall portion and the mouth portion. And, below the mouth portion side seal portion, the mouth portion side engaging portion provided on the outer peripheral surface of the mouth portion and the inner peripheral surface of the side wall portion are provided under the mouth portion side engaging portion. It has a cap-side engaging portion that is cut-engaged, and the side wall portion includes a side wall portion main body and at least a part of the cap-side engaging portion, and the side wall portion below the cap-side sealing portion. It is characterized by having a removing portion in which the undercut engagement with the mouth portion side engaging portion is eliminated by breaking the weakened portion integrally connected to the portion main body.

In the discharge container of the present invention, it is preferable that the removing portion has a C-shape in the above configuration.

In the above configuration, the discharge container of the present invention preferably has a lid in which the discharge cap is integrally connected to the removal portion via a hinge.

According to the present invention, it is possible to provide a discharge container in which the undercut-engaged discharge cap can be easily removed from the mouth portion.

It is a partial notch side view of the discharge container which is one Embodiment of this invention. It is an enlarged sectional view of the main part of the discharge container shown in FIG. It is a bottom view of the side wall portion of the discharge cap shown in FIG. It is a modification of the discharge container shown in FIG. 1, and is sectional drawing which shows the case where the outside air introduction port is opened in the outer port part. It is a modification of the discharge container shown in FIG. 1, and is the cross-sectional view which shows the case where the removal part is integrally connected with the lid body via a hinge. It is a side view seen from the hinge side of the discharge cap shown in FIG. It is a bottom view of the side wall portion of the discharge cap shown in FIG.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

As shown in FIG. 1, the discharge container 1 of the present embodiment is a squeeze type container used for storing a food seasoning such as soy sauce as a content (content liquid), and is discharged with the container body 2. It is equipped with a cap 3.

In the scope of the present specification and patent claims, in the vertical direction, as shown in FIG. 1, the discharge container 1 is up and down in an upright position in which the discharge cap 3 is located above the container body 2. It shall mean a direction, and the radial direction shall mean a direction passing through the axis O of the discharge container 1 and along a straight line perpendicular to the axis O.

The container body 2 has a double structure having an outer layer body 10 and an inner layer body 20 housed inside the outer layer body 10 and capable of being independently reduced in volume and deformable independently of the outer layer body 10.

The outer layer 10 is a portion constituting the outer shell of the container body 2, and has a bottle shape including a cylindrical outer mouth portion 11 and a bottomed tubular body portion 12 integrally connected to the lower end of the outer mouth portion 11. It has become.

A neck ring 14 is integrally provided at the lower end of the outer opening portion 11. The neck ring 14 extends in an annular shape over the entire circumference of the outer opening portion 11 and projects outward from the outer peripheral surface of the outer opening portion 11 in the radial direction.

The body portion 12 is integrally connected to the lower end of the outer opening portion 11 and has a shoulder-shaped portion 12a that gradually expands in diameter downward and projects outward in the radial direction with respect to the outer opening portion 11 and a shoulder-shaped portion. It is integrally connected to the lower end of the 12a and has a cylindrical body body portion 12b and a bottom portion 12c that closes the lower end of the body body portion 12b.

The body portion 12b has flexibility and can be elastically deformed by being squeezed (pressed) and dented inward in the radial direction, and from the dented state due to the elastic force to the original shape. You can restore it on your own. By making the body portion 12b elastically deformable by squeeze, it is possible to easily perform the ejection operation of the contents, and the body portion 12b can be easily returned to the original shape after the contents are ejected. By restoring to, the outside air is surely introduced between the outer layer body 10 and the inner layer body 20 through the outside air introduction port 13 described later, and the container body 2 is surely exerted the function as a double container. be able to.

As shown in FIG. 1, the inner layer 20 has an inner opening portion 21 and an accommodating portion 22.

As shown in FIG. 2, the inner opening portion 21 has a cylindrical shape having a smaller diameter than the outer opening portion 11, and is arranged coaxially with the outer opening portion 11 inside the outer opening portion 11. The mouth portion of the container body 2 is formed by the outer mouth portion 11 and the inner mouth portion 21.

A gap 23 at a predetermined interval is provided between the inner peripheral surface of the outer opening portion 11 and the outer peripheral surface of the inner opening portion 21. Cylindrical diameter-expanding portions 24 are integrally provided at the upper end of the inner opening portion 21, and the outer peripheral surface of the diameter-expanding portion 24 comes into contact with the inner peripheral surface of the outer opening portion 11 so that the inner opening portion 21 is provided. Is positioned radially with respect to the outer opening portion 11. An annular flange portion 25 extending radially outward is integrally provided at the upper end of the enlarged diameter portion 24, and the flange portion 25 abuts on the upper end of the outer opening portion 11 so that the inner opening portion 21 becomes the outer opening portion. It is positioned axially with respect to 11.

An outside air introduction port 13 is opened between the upper end of the outer port portion 11 and the upper end of the inner port portion 21. The outside air introduction port 13 is formed by a plurality of groove portions 70 having a predetermined width provided extending over the outer peripheral surface of the enlarged diameter portion 24 of the inner port portion 21 of the inner layer body 20 and the lower surface of the flange portion 25. A single groove 70 may be provided at the mouth of the container body 2.

The groove portion 70 may be provided on the inner peripheral surface and the upper end surface of the outer opening portion 11 of the outer layer body 10 instead of the outer peripheral surface of the enlarged diameter portion 24 of the inner opening portion 21 of the inner layer body 20 and the lower surface of the flange portion 25. Also, in addition to the outer peripheral surface of the enlarged diameter portion 24 of the inner opening portion 21 of the inner layer body 20 and the lower surface of the flange portion 25, the inner peripheral surface and the upper end surface of the outer opening portion 11 of the outer layer body 10 are also provided. May be good.

As shown in FIG. 1, the accommodating portion 22 is formed in a bag shape thinner than the body portion 12, and is integrally connected to the lower end of the inner opening portion 21 and laminated on the inner surface of the body portion 12. The inside of the accommodating portion 22 is a storage space S for the contents, and the contents can be filled in the accommodating portion 22 through the inner opening portion 21 and the contents are accommodated in the accommodating portion 22 through the inner opening portion 21. Can be discharged to the outside. The accommodating portion 22 is freely deformable, and can be deformed (deformed so as to reduce the internal volume) away from the inner surface of the body portion 12 as the contents are poured out. With the volume reduction deformation of the accommodating portion 22, outside air is introduced between the outer layer body 10 and the inner layer body 20 from the outside air introduction port 13, so that the body body portion 12b is maintained or restored to its original shape. Only the accommodating portion 22 can be volume-reduced and deformed independently of the body portion 12.

As shown in FIG. 2, a vertical rib 26 is integrally provided on the outer surface of the inner layer 20 in order to secure an air passage for the outside air from the outside air introduction port 13 to the body portion 12 and the accommodating portion 22. ing. Although details are not shown, in the container body 2 of the present embodiment, a plurality of vertical ribs 26 corresponding to the respective outside air introduction ports 13 are arranged side by side at intervals in the circumferential direction on the outer surface of the inner layer body 20. It is provided. Each of the vertical ribs 26 protrudes radially outward from the outer surface of the inner layer body 20 and extends from the inner opening portion 21 across the accommodating portion 22 in the direction along the axis O, and the outer layer body 10 and the inner layer body 20 Between them, an outside air ventilation path is formed which extends from the outside air introduction port 13 beyond the neck ring 14 to the portion between the shoulder-shaped portion 12a and the accommodating portion 22. As a result, the ventilation path of the outside air introduced from the outside air introduction port 13 can be surely introduced into the space between the shoulder-shaped portion 12a and the accommodating portion 22.

The vertical rib 26 may be provided on the inner peripheral surface of the outer opening portion 11. Further, the vertical rib 26 may not be provided on either the outer opening portion 11 or the inner opening portion 21. Further, the above-mentioned gap 23 is formed by a groove between the vertical ribs 26, but when the vertical ribs 26 are not provided in either the outer opening portion 11 or the inner opening portion 21, the gap 23 is provided over the entire circumference. Alternatively, the outer peripheral surface of the inner opening portion 21 may be separated from the inner peripheral surface of the outer opening portion 11 to form an airway when the outside air is introduced.

As shown in FIG. 2, an annular mouth portion side seal portion 17 is provided on the outer peripheral surface of the outer mouth portion 11. The mouth portion side seal portion 17 is provided below the outside air introduction port 13.

A mouth-side engaging portion 16 for holding and retaining the discharge cap 3 is integrally provided in a portion of the outer peripheral surface of the outer mouth portion 11 below the mouth-side seal portion 17. The mouth-side engaging portion 16 extends in an annular shape over the entire circumference of the outer mouth portion 11 and projects radially outward from the outer peripheral surface of the outer mouth portion 11.

Both the outer layer 10 and the inner layer 20 are made of polyethylene terephthalate resin (PET). By making the outer layer 10 and the inner layer 20 each made of polyethylene terephthalate resin, the container body 2 can be made into a lightweight, highly transparent and highly recyclable container. The material of the outer layer body 10 and the inner layer body 20 is not limited to the polyethylene terephthalate resin.

The container body 2 having the above configuration is blow-molded with a double-structured preform assembly incorporating the inner preform for forming the inner layer 20 inside the outer preform for forming the outer layer 10. It is a formed blow-molded product. In this embodiment, biaxial stretch blow molding is adopted as blow molding.

The outer preform is stretched by blow molding so as to be connected to the outer mouth portion having the same shape as the outer mouth portion 11 of the outer layer body 10 and the lower end portion of the outer mouth portion by injection molding the resin material using an injection molding die. It may be formed in a substantially test tube shape having a bottomed cylindrical stretched portion.

The inner preform is stretched by blow molding so as to be connected to the inner mouth portion having substantially the same shape as the inner mouth portion 21 of the inner layer 20 and the lower end of the inner mouth portion by injection molding the resin material using an injection molding mold. It may be formed in a substantially test tube shape having a bottomed cylindrical stretched portion.

Next, the configuration of the discharge cap 3 will be described.

The discharge cap 3 is made of polypropylene resin and includes a cap body 40 and a lid 50 as shown in FIG. The discharge cap 3 is not limited to the polypropylene resin, and may be made of, for example, a polyethylene resin. If the container body 2 and the discharge cap 3 are made of different materials that need to be separated, these materials can be changed in various ways.

The cap body 40 is formed in a substantially ecstatic cylindrical shape including a top wall portion 41 and a cylindrical side wall portion 42 integrally connected to the outer peripheral edge of the top wall portion 41, and the side wall portion 42 is an outer port. The top wall portion 41 is attached to the outer opening portion 11 so as to cover the outer periphery of the portion 11 and to cover the opening end of the outer opening portion 11.

The lower end side portion of the side wall portion 42 is integrally connected to the side wall portion main body 42b via the weakened portion 42a as a planned breakage portion at the time of sorting, and the cap side engaging portion 43 described later is provided on the inner peripheral surface. It constitutes a C-shaped (see FIG. 3) removing portion 42c. The weakened portion 42a is composed of a plurality of connecting portions (11 in this example) arranged intermittently in the circumferential direction, and integrally connects the upper end edge of the removing portion 42c and the lower end edge of the side wall portion main body 42b. There is. The removal portion 42c has one portion in the circumferential direction cut out in the vertical direction, and one end portion in the circumferential direction adjacent to the cutout portion constitutes a tab 42d for picking when the removal portion 42c is scraped off. ing. The upper end edge of the picking tab 42d is not connected to the side wall main body 42b, so that it is easy to insert a finger inside the picking tab 42d in the radial direction when picking the picking tab 42d. The lower portions at both ends in the circumferential direction adjacent to the cutout portion of the removing portion 42c have a shape in which the corners are rounded in an arc shape, which enhances the visibility and operability of the picking tab 42d. In this way, the removing portion 42c can be removed from the side wall portion main body 42b by breaking the weakened portion 42a by the operation of picking and rotating the picking tab 42d at the time of sorting. Therefore, the cap-side engaging portion 43 provided on the inner peripheral surface of the removing portion 42c can be removed from the side wall portion 42 so that the discharge cap 3 can be easily removed from the container body 2.

The weakened portion 42a is not limited to the one composed of intermittently connected portions, and may be configured, for example, with a thin-walled portion that is easily broken over the entire circumference. Further, the shape of the removing portion 42c is not limited to the C-shaped shape, and may be, for example, a semicircular shape or the like. Further, a part of the cap-side engaging portion 43 may be provided on the removing portion 42c, and another part of the cap-side engaging portion 43 may be provided on the side wall portion main body 42b.

On the inner peripheral surface of the removing portion 42c, a cap-side engaging portion 43 formed in a protruding shape protruding inward in the radial direction is provided. When the discharge cap 3 is plugged into the outer mouth portion 11, the cap-side engaging portion 43 undercuts and engages with the mouth portion-side engaging portion 16 provided on the outer peripheral surface of the outer mouth portion 11 to engage the discharge cap. 3 is held in the outer opening portion 11 to prevent it from coming off. As described above, the discharge cap 3 is configured to be attached to the outer opening portion 11 by tapping.

The cap-side engaging portion 43 may be formed in a C-shape extending in the circumferential direction of the removing portion 42c, or may be formed by being divided into a plurality of portions arranged intermittently in the circumferential direction.

A discharge port 44 for contents is integrally provided on the upper surface of the top wall portion 41. The contents stored in the storage space S of the inner layer 20 can be discharged to the outside from the discharge port 44. In the present embodiment, the discharge port 44 is formed in a cylindrical shape that curves outward while gradually expanding its diameter upward from the top wall portion 41, but its shape and size are the accommodation space. Various changes can be made according to the contents and uses housed in S.

A cap-side sealing portion 45 is provided on the inner peripheral surface of the side wall portion main body 42b. The cap-side seal portion 45 abuts on the mouth-side seal portion 17 over the entire circumference, and airtightly seals between the side wall portion 42 and the outer mouth portion 11 below the outside air introduction port 13. The cap-side sealing portion 45, the weakening portion 42a, and the cap-side engaging portion 43 are arranged in the order described from above to below.

Further, the inner peripheral surface of the side wall portion main body 42b has a portion below the cap side seal portion 45 whose diameter is expanded via the step portion. A plurality of guide ribs 42e extending downward from the step portion are provided in the enlarged diameter portion. The guide rib 42e slides on the outer peripheral surface of the outer port portion 11 when the discharge cap 3 is plugged to stabilize the posture of the discharge cap 3, thereby enabling stable capping. The guide rib 42e may not be provided. Further, a detent mechanism (rib or the like) may be provided on the inner peripheral surface of the side wall portion main body 42b and the outer peripheral surface of the outer opening portion 11.

The top wall portion 41 is provided with a ventilation port 46, and outside air can be taken into the inside of the cap body 40 from the outside through the ventilation port 46 and supplied to the outside air introduction port 13.

The lid 50 is formed in a ridged cylinder having substantially the same diameter as the cap body 40, and is openably and closably connected to the cap body 40 via a hinge 51 on a part of the outer peripheral surface. The lid 50 is integrally provided with a tubular plug 53 on the inner surface of the top wall 52, and when the lid 50 is in a closed position covering the upper part of the cap body 40, the plug 53 is a discharge port 44. The discharge port 44 is closed by fitting on the inner peripheral surface of the above. Further, on the inner surface of the top wall 52, a cylindrical protrusion 54 that covers the outside of the plug 53 is provided. The lid 50 is closed so as to cover the top wall 41 of the cap body 40 by undercut engagement of the locking groove 55 provided on the inner circumference of the opening edge with the outer peripheral edge of the top wall 41. It is held in the state.

On the other hand, when the lid 50 is rotated around the hinge 51 to be in the open position, the plug 53 is separated from the discharge port 44, and the discharge port 44 is opened so that the contents can be discharged.

An inner plug 60 is attached to the inside of the cap body 40. The inner plug 60 is attached to the open end of the inner opening portion 21 and covers the open end. A cylindrical engaging wall 61 that stands up upward is integrally provided on the outer peripheral edge of the inner plug 60, and the upper end of the engaging wall 61 abuts on the lower surface of the top wall portion 41 of the cap body 40. As a result, a predetermined distance is provided between the inner plug 60 and the top wall portion 41 on the radial inside of the engaging wall 61. The engaging wall 61 is provided with an opening that serves as a passage for outside air.

The inner plug 60 is provided with an outflow hole 62 for the contents. The outflow hole 62 communicates with the discharge port 44 through the space between the inner plug 60 and the top wall portion 41, and the contents accommodated in the accommodation space S are discharged through the outflow hole 62. It can be leaked toward 44.

The inner plug 60 incorporates a discharge valve including a check valve 63, a leg portion 63a, and an annular wall 64. The check valve 63 is formed in a plate shape (disc shape), is arranged on the upper surface of the inner plug 60 facing the top wall portion 41, and closes the outflow hole 62. The annular wall 64 is formed in a cylindrical shape and is arranged between the top wall portion 41 and the inner plug 60, and is fitted to the top wall portion 41 and the inner plug 60. Further, the check valve 63 is connected to the annular wall 64 by a plurality of elastically deformable legs 63a. As a result, the check valve 63 moves in the direction of approaching and separating from the upper surface of the inner plug 60, allowing the contents to flow out from the accommodating space S toward the ejection port 44, and accommodating the contents from the ejection port 44. The outflow hole 62 is opened and closed so as to prevent the inflow of the contents and the outside air toward the space S.

The space between the top wall portion 41 and the inner plug 60 is divided into a liquid flow path inside the annular wall 64 and a gas (outside air) flow path outside the annular wall 64. ing.

The inner plug 60 is provided with a cylindrical tubular wall 65 located on the opposite side of the outflow hole 62 from the hinge 51 and extending toward the accommodation space S. The lower end of the tubular wall 65 is reduced in diameter so that the inner diameter becomes narrower toward the bottom, and inside the tubular wall 65, a valve body 66 formed in a spherical shape (ball) made of steel, resin, or the like is vertically oriented. It is arranged so that it can be moved freely.

When the container body 2 is in an inclined posture with the discharge port 44 facing downward, the valve body 66 moves inside the tubular wall 65 toward the discharge port 44. Then, after the contents are poured out, when the container body 2 is returned to the upright posture so that the discharge port 44 faces upward, the valve body 66 has a reduced diameter portion with the inside of the tubular wall 65 facing downward. The contents remaining in the discharge port 44 are sucked toward the inside of the tubular wall 65 after moving to the position where the wall abuts (the position shown in FIG. 2), and the top wall portion 41, the check valve 63, and the annular wall 64 are sucked. Pull back to the space surrounded by. As a result, the remaining amount of the liquid inside the discharge port 44 can be reduced, and the liquid can be prevented from dripping from the discharge port 44. In this way, the valve body 66 functions as a suckback mechanism for preventing liquid dripping from the discharge port 44.

An air check valve 67 that opens and closes the vent 46 is integrally provided on the outer peripheral surface of the annular wall 64. The check valve 67 for air allows the introduction of outside air from the vent 46 into the inside of the cap body 40 and prevents the outflow of air from the inside of the cap body 40 to the outside through the vent 46. Function. Therefore, when squeezing the body body portion 12b of the container body 2 to discharge the contents, air is held between the outer layer body 10 and the inner layer body 20 and the contents are easily pushed out from the inner layer body 20. Can be done. Further, when the squeeze of the body body portion 12b is released after the contents are discharged, the inner layer 20 is introduced so that the outside air is introduced between the outer layer 10 and the inner layer 20 from the vent 46 through the outside air introduction port 13. The body body portion 12b of the outer layer body 10 can be restored to its original shape while being reduced in volume and deformed. As a result, after the contents are discharged, the outside air is prevented from flowing into the inner layer 20 from the discharge port 44 due to the restoration of the body body portion 12b, and the contents are accommodated in the accommodation space S of the inner layer 20. It is possible to make the contents hard to come into contact with air and suppress deterioration of their quality.

As described above, according to the discharge container 1 of the present embodiment, the discharge cap 3 can be easily removed from the outer port portion 11 of the container body 2 by a simple operation of removing the removing portion 42c from the side wall portion main body 42b. be able to. Therefore, while the discharge cap 3 is configured to be easily attached to the outer port 11 of the container body 2 by tapping, the discharge cap 3 can be easily removed from the outer port 11 of the container body 2. For example, when recycling the container body 2 made of polyethylene terephthalate resin, it is possible to facilitate the work of separating the discharge cap 3 from the container body 2.

Further, in the discharge container 1 of the present embodiment, the mouth portion side seal portion 17 and the cap side seal portion 45 seal between the side wall portion 42 and the outer mouth portion 11 below the outside air introduction port 13. Since the outside air is introduced into the outside air introduction port 13 through the ventilation port 46 provided in the top wall portion 41 of the cap body 40, the contents, foreign matter, etc. between the outer layer body 10 and the inner layer body 20 are introduced through the outside air introduction port 13. Can be reliably reduced and deformed in the accommodating portion 22 of the inner layer body 20 when the contents are discharged. The mouth side seal portion 17 is provided at the upper end portion of the outer peripheral surface of the outer mouth portion 11 in the present embodiment, but its arrangement can be changed as long as it is above the mouth portion side engaging portion 16. be. Further, although the mouth side sealing portion 17 is formed of a smooth surface in the present embodiment, it may be formed of an annular protrusion or the like.

Further, in the discharge container 1 of the present embodiment, since the removing portion 42c has a C-shape, the removing portion 42c can be removed and separated by an easy operation of picking and rotating one end portion in the circumferential direction. Can be.

FIG. 4 is a modified example of the discharge container 1 shown in FIG. 1, and is a cross-sectional view showing a case where the outside air introduction port 13 is opened to the outer port portion 11. In FIG. 4, the members corresponding to the above-mentioned members are designated by the same reference numerals.

In the discharge container 1 shown in FIG. 1, the outside air introduction port 13 is configured to open between the upper end of the outer port portion 11 and the upper end of the inner port portion 21, but the outside air introduction port 13 is the mouth of the container body 2. As long as the portion is provided so that outside air can be introduced between the inner layer body 20 and the outer layer body 10, the outer port portion 11 may be configured as a through hole penetrating in the radial direction as shown in FIG. In the case shown in the figure, a plurality of outside air introduction ports 13 are provided in the outside port portion 11. Each of these outside air introduction ports 13 is a long hole-shaped through hole that penetrates the outer port portion 11 in the radial direction and extends in the circumferential direction, and is provided at a predetermined interval in the circumferential direction. The plurality of outside air introduction ports 13 communicate with each other between the outer layer body 10 and the inner layer body 20, and outside air can be introduced between the outer layer body 10 and the inner layer body 20 through these outside air introduction ports 13. .. If at least one outside air introduction port 13 is provided, the number thereof can be arbitrarily set.

In this modification, the outer peripheral surface of the enlarged diameter portion 24 of the inner opening portion 21 abuts on the inner peripheral surface of the outer opening portion 11 over the entire circumference, so that the outer opening portion 11 and the inner opening portion 21 are in contact with each other. The gap 23 is closed to the outside at the upper end portion of the outer opening portion 11 or the inner opening portion 21.

On the outer peripheral surface of the outer port portion 11, a mouth portion side seal portion 17 is provided at a portion between the outside air introduction port 13 and the mouth portion side engaging portion 16 provided below the outside air introduction port 13. There is. The mouth portion side seal portion 17 extends in an annular shape over the entire circumference of the outer mouth portion 11, and projects outward from the outer peripheral surface of the outer mouth portion 11 in the radial direction. The inner peripheral surface of the side wall portion main body 42b is in contact with the mouth portion side sealing portion 17 over the entire circumference, and the space between the side wall portion 42 and the outer opening portion 11 is airtightly sealed below the outside air introduction port 13. A cap-side sealing portion 45 is provided.

Further, in this modification, the plurality of guide ribs 42e are provided on the inner peripheral surface of the side wall portion main body 42b on the upper side of the cap side seal portion 45. The plurality of guide ribs 42e form a gap between them, which serves as a passage for outside air from the ventilation port 46 to the outside air introduction port 13. The guide rib 42e may not be provided. Further, a detent mechanism (rib or the like) may be provided on the inner peripheral surface of the side wall portion main body 42b and the outer peripheral surface of the outer opening portion 11.

Even with such a configuration, as in the case of the above-described embodiment, easy sorting can be enabled by the operation of removing the removing portion 42c.

FIG. 5 is a modified example of the discharge container 1 shown in FIG. 1, and is a cross-sectional view showing a case where the removing portion 42c is integrally connected to the lid 50 via the hinge 51. FIG. 6 is a side view of the discharge cap 3 shown in FIG. 5 as viewed from the hinge 51 side. FIG. 7 is a bottom view of the side wall portion 42 of the discharge cap 3 shown in FIG. In FIG. 7, the members corresponding to the above-mentioned members are designated by the same reference numerals.

In the discharge container 1 shown in FIG. 1, the removal portion 42c has a C-shaped structure, and the lid 50 is integrally connected to the side wall portion main body 42b via a hinge 51. On the other hand, in the modified example shown in FIG. 7, the removing portion 42c is provided integrally connected to the lid 50 via the hinge 51.

In this modification, the removing portion 42c is formed in a cylindrical shape, and a hinge 51 is integrally provided on the upper portion thereof. The inner peripheral surface of the removing portion 42c has an enlarged diameter at the upper end side portion thereof, and a cylindrical side wall portion main body 42b is arranged inside the enlarged diameter portion in the radial direction. Further, a weakening portion 42a integrally connected to the lower end edge of the side wall portion main body 42b is provided on the step portion formed at the lower end edge of the enlarged diameter portion of the removal portion 42c over the entire circumference. The weakening portion 42a may be provided only in a part in the circumferential direction. In this modification as well, the weakened portion 42a is composed of a plurality of connecting portions (11 in this example) arranged intermittently in the circumferential direction.

As shown in FIGS. 6 to 7, the removing portion 42c is provided with a notch portion 42f formed in the vertical direction at one location on the hinge 51 side in the circumferential direction. The removal portion 42c has a thin-walled portion at the lower end side portion of the notch portion 42f, and is divided in the circumferential direction at the remaining portion.

With such a configuration, at the time of sorting, the lid 50 is rotated around the hinge 51 from the closed position to open the position, and then the lid 50 is pulled down and rotated to rotate the lid 50 to the notched portion of the removal portion 42c. While cutting the thin portion of 42f, the weakened portion 42a can be cut, and the removing portion 42c having the cap-side engaging portion 43 can be scraped off together with the lid 50. Therefore, the discharge cap 3 can be easily removed from the outer port 11 of the container body 2, and easy sorting can be performed.

The weakened portion 42a is not limited to the one composed of intermittently connected portions, and may be composed of, for example, a thin-walled portion that is easily broken. Further, the shape of the removing portion 42c is not limited to a cylindrical shape, and may be, for example, a semi-cylindrical shape. Further, a part of the cap-side engaging portion 43 may be provided on the removing portion 42c, and another part of the cap-side engaging portion 43 may be provided on the side wall portion main body 42b. Further, although the mouth portion side seal portion 17 is provided at the upper end portion on the outer peripheral surface of the outer mouth portion 11 in this modification, its arrangement can be changed as long as it is above the mouth portion side engaging portion 16. .. Further, although the mouth portion side sealing portion 17 is formed of a smooth surface in this modification, it may be formed of an annular protrusion or the like.

It goes without saying that the present invention is not limited to the above-described embodiment and can be variously modified without departing from the gist thereof.

For example, in the above-described embodiment, the container body 2 is formed into a double structure by blow molding, but the present invention is not limited to this, for example, an inner layer body formed inside the outer layer body 10 separately from the outer layer body 10. It can also be a double container incorporating 20.

Further, in the above-described embodiment, the discharge cap 3 is provided with a check valve 67 for air, but the present invention is not limited to this, and a check valve 67 for air may not be provided. When the check valve 67 for air is not provided in the discharge cap 3, the opening of the engaging wall 61 is closed, and the space between the engaging wall 61 and the top wall portion 41, and further the engaging wall 61 and the side wall portion 42 are closed. A slight gap may be provided between the air vent 46 and the outside air introduction port 13 through a passage including these gaps. Further, the arrangement of the discharge port 44 and the ventilation port 46 may be changed if they are provided in the discharge cap 3.

Further, in the above-described embodiment, the container body 2 is formed by biaxial stretch blow molding from a preform, but the present invention is not limited to this, and the container body 2 may be formed by extrusion blow molding. Further, the container body 2 is a laminated peeling container (biaxial from preform) in which the inner layer 20 is releasably laminated inside the outer layer 10 so that the inner layer 20 can be deformed independently of the outer layer 10. It may be formed by stretch blow molding, or it may be formed by extrusion blow molding).

Further, in the above-described embodiment, the removing portion 42c can be removed from the side wall portion main body 42b by breaking the weakened portion 42a, but the present invention is not limited to this. That is, the undercut engagement between the removing portion 42c and the mouth side engaging portion 16 is at least partially eliminated (that is, eliminated or partially eliminated) by the breakage of the weakened portion 42a integrally connected to the side wall portion main body 42b. The connection portion between the removal portion 42c and the side wall portion main body 42b may be left after the weakening portion 42a is broken.

1 Discharge container 2 Container body 3 Discharge cap 10 Outer layer 11 Outer port 12 Body 12a Shoulder 12b Body body 12c Bottom 13 Outside air introduction port 14 Neck ring 16 Mouth side engaging part 17 Mouth side seal 20 Inner layer 21 Inner mouth 22 Accommodating part 23 Gap 24 Widening part 25 Flange part 26 Vertical rib 40 Cap body 41 Top wall part 42 Side wall part 42a Weakened part 42b Side wall part main body 42c Removal part 42d Picking tab 42e Guide rib 42f Cutting Notch 43 Cap side engaging part 44 Discharge port 45 Cap side sealing part 46 Vent 50 Lid 51 Hinge 52 Top wall 53 Plug 54 Cylindrical protrusion 55 Locking groove 60 Inner plug 61 Engaging wall 62 Outflow hole 63 Reverse Stop valve 63a Leg 64 Circular wall 65 Cylindrical wall 66 Valve body 67 Air check valve 70 Groove O Axis center S Accommodation space

Claims (3)

A double-structured container body having an outer layer and a volume-reducing and deformable inner layer housed inside the outer layer and having an outside air inlet at the mouth, and a container body having a double structure.
A discharge cap having a top wall portion and a cylindrical side wall portion connected to the top wall portion, which is attached to the mouth portion and is provided with a discharge port for contents and a ventilation port for outside air.
A discharge container provided inside the discharge cap and having a check valve for opening and closing the flow path of the contents toward the discharge port.
An annular mouth-side seal portion provided on the outer peripheral surface of the mouth portion below the outside air introduction port,
An annular cap-side seal portion provided on the inner peripheral surface of the side wall portion, which abuts on the mouth portion-side seal portion over the entire circumference and seals between the side wall portion and the mouth portion.
The mouth side engaging portion provided on the outer peripheral surface of the mouth portion below the mouth portion side seal portion, and the mouth portion side engaging portion.
It has a cap-side engaging portion provided on the inner peripheral surface of the side wall portion and undercut-engaged with the mouth-side engaging portion.
The side wall portion includes at least a part of the side wall portion main body and the cap side engaging portion, and the mouth portion side due to a breakage of a weakened portion integrally connected to the side wall portion main body below the cap side sealing portion. A discharge container comprising: a removing portion in which the undercut engagement with the engaging portion is at least partially eliminated. The discharge container according to claim 1, wherein the removing portion has a C-shape. The discharge container according to claim 1, wherein the discharge cap has a lid that is integrally connected to the removal portion via a hinge.

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