JP7031993B2 - Double container cap - Google Patents

Description

The present invention relates to a cap for a double container.

In the double container body that stores cosmetics such as lotion, toiletries such as shampoo, rinse, liquid soap, foods such as food seasonings, and other liquid contents, and the mouth of the double container body A double container consisting of a cap to be attached is known. In such a double container, the main body of the double container has a volume-reducing deformable inner layer (deformable so as to reduce the volume) that forms a storage space for the contents, and an outer layer that surrounds the inner layer. It is provided at the mouth and is provided with an outside air introduction port for introducing outside air between the inner layer body and the outer layer body. Further, as described in Patent Document 1, for example, the cap is a cap body member having a mounting cylinder wall that engages with the outer peripheral surface of the mouth portion and a top surface portion that is connected to the mounting cylinder wall and covers the mouth portion from above. And an inner plug member arranged between the mouth portion and the top surface portion, a valve member arranged between the top surface portion and the inner plug member and having a discharge valve body and an air valve body, and for suction back. May be equipped with a ball valve.

In the double container cap described in Patent Document 1, the top surface portion, the valve member, and the inner plug member are separated from the discharge passage for discharging the contents, the discharge passage, and the accommodation space, and the outside air is provided on the top surface portion. It is partitioned from the outside air inflow path that flows in from the outside airflow inlet toward the outside air introduction port. Further, the inner plug member has a discharge valve seat that surrounds the inlet of the discharge path and on which the discharge valve body can be seated, and a cylindrical hanging cylinder that hangs from a portion adjacent to the discharge valve seat. .. The hanging cylinder partitions a space for suction back that communicates with the discharge path, and a ball valve for suction back is arranged in the space. The valve member has a cylinder wall that separates the discharge path and the outside air inflow path, a discharge valve body is connected to the inner peripheral surface of the cylinder wall, and an annular air valve body is connected to the outer peripheral surface of the cylinder wall. The inner peripheral edges of the are connected. The top surface portion surrounds the entire portion including the discharge path and the outside air flow inlet, and has an air valve seat on which the air valve body can be seated.

According to such a double container cap, by tilting the double container and squeezing (squeezing operation) the outer layer, the inner layer is smoothly reduced in volume and deformed while suppressing air leakage by the air valve body. Then, the contents contained in the accommodation space can be discharged from the outlet (discharge port) of the discharge path. In addition, by releasing the squeeze, the outside air is introduced between the inner layer and the outer layer from the outside air inlet through the outside air inflow path, so that the outer layer is restored while maintaining the volume reduction deformation of the inner layer. Can be made to. In this way, the double container body is used to discharge the contents in the accommodation space without replacing it with air, which suppresses the contact between the contents in the accommodation space and the outside air and maintains good quality of the contents. can do.

Japanese Unexamined Patent Publication No. 2018-558594

The double container cap as described in Patent Document 1 has been miniaturized by devising the member configuration and the shape of each member, but the cap is further improved from the viewpoint of improving the design of the container. Miniaturization may be required.

Therefore, an object of the present invention is to provide a cap for a double container that can be miniaturized.

The double container cap according to one aspect of the present invention is
A volume-reducing deformable inner layer that forms a storage space for the contents, an outer layer that surrounds the inner layer, and outside air that is provided at the tubular mouth and introduces outside air between the inner layer and the outer layer. A double container cap attached to the mouth of a double container body provided with an introduction port.
A cap body member having a mounting cylinder wall that engages with the outer peripheral surface of the mouth portion and a top surface portion that connects to the mounting cylinder wall and covers the mouth portion from above.
An inner plug member arranged between the mouth portion and the top surface portion,
A valve member having a discharge valve body and an air valve body,
A cylindrical discharge cylinder for partitioning a discharge path for discharging the contents is formed by the top surface portion, the inner plug member, and the valve member.
The discharge cylinder has a discharge valve seat provided on the inner plug member and on which the discharge valve body can be seated.
The top surface portion has an outside airflow inlet and an air valve seat that surrounds the outside airflow inlet without surrounding the discharge path and on which the air valve body can be seated.
The top surface portion, the inner plug member, and the valve member separate the discharge path and the accommodation space, and partition the outside air inflow path for allowing outside air to flow in from the outside air flow inlet toward the outside air introduction port. Is.

The double container cap according to the present invention may have an annular plate-shaped outer peripheral edge portion in which the inner plug member abuts on the upper surface of the mouth portion and extends in the horizontal direction.

The double container cap according to the present invention is
The inner plug member has a tubular hanging cylinder that hangs from the outer peripheral edge portion along the inner peripheral surface of the mouth portion, a bottom wall that is connected to the hanging cylinder, and a discharge cylinder that is connected to the bottom wall. May have a lower cylinder wall, which constitutes the lower part of the
The valve member may have an intermediate cylinder wall constituting the vertical intermediate portion of the discharge cylinder.

The double container cap according to the present invention is
The inner plug member may have a bottomed cylindrical accommodating wall hanging from the bottom wall.
The valve member is connected to the intermediate cylinder wall and is connected to a cylindrical air valve base portion accommodated in the accommodation wall, the air valve base portion and the air valve body, and the air valve body is attached upward. It may have an elastic portion of an air valve that vigorates.

The double container cap according to the present invention is provided with an alignment portion that engages with the air valve base portion in order to align the air valve base portion in the circumferential direction of the accommodation wall on the inner peripheral surface of the accommodation wall. May be done.

In the double container cap according to the present invention, the elastic portion of the air valve may have one or more coil springs.

The double container cap according to the present invention is composed of an annular outer frame portion in which the valve member is connected to the intermediate cylinder wall and the intermediate cylinder wall and is sandwiched between the top surface portion and the inner plug member. It may have an air valve base portion, and an air valve elastic portion that connects the valve base portion and the air valve body and urges the air valve body upward.

The double container cap according to the present invention is
The air valve body has a substantially disk shape,
The valve base portion may have a pair of arcuate inner frame portions extending in the circumferential direction of the air valve body from the outer frame portion.
The elastic portion of the air valve may be composed of four springs in the shape of curved leaf springs arranged at equal intervals in the circumferential direction of the air valve body.
The four springs may be connected to each of the pair of arcuate inner frame portions, the intermediate cylinder wall, and the outer frame portion one by one.

In the double container cap according to the present invention, the valve member connects the intermediate cylinder wall constituting the vertical intermediate portion of the discharge cylinder and the discharge valve body, and urges the discharge valve body downward. It may have one or more coil spring-shaped discharge valve elastic portions.

In the double container cap according to the present invention, the valve member connects the discharge valve base portion connected to the intermediate cylinder wall constituting the vertical intermediate portion of the discharge cylinder, and the discharge valve base portion and the discharge valve body. It may also have a curved leaf spring-shaped discharge valve elastic portion that urges the discharge valve body downward.

According to the present invention, it is possible to provide a cap for a double container that can be miniaturized.

It is a vertical sectional view which shows the double container provided with the cap for the double container which concerns on 1st Embodiment of this invention. It is a bottom view of the top surface part of the cap main body member shown in FIG. It is a top view of the valve member shown in FIG. FIG. 3 is a cross-sectional view taken along the line AA of FIG. It is a top view of the inner plug member shown in FIG. It is a vertical sectional view which shows the double container provided with the cap for the double container which concerns on 2nd Embodiment of this invention. It is a top view of the valve member shown in FIG. It is a top view of the inner plug member shown in FIG.

Hereinafter, the double container cap according to the embodiment of the present invention will be described in detail with reference to the drawings. The vertical direction is based on the upright state of the double container. That is, the upper direction means the upper side in FIGS. 1 and 6, and the lower direction means the opposite direction. Further, the vertical cross section means a cross section in a vertical plane.

First, the double container cap according to the first embodiment of the present invention will be described in detail. As shown in FIG. 1, the double container cap 1 (hereinafter, also referred to as cap 1) according to the present embodiment is used for cosmetics such as lotion, toiletries such as shampoo, rinse, and liquid soap, and food seasonings. The double container 3 is formed by being attached to the cylindrical mouth portion 7 of the double container main body 2 for accommodating foods such as foods and other liquid contents (not shown).

The double container body 2 has a volume-reducing deformable inner layer 4 (inner container) that forms a storage space S for the contents (inner container) and an outer layer 5 (outer) that surrounds the inner layer 4. A container) and an outside air introduction port 6 provided in the mouth portion 7 to introduce outside air between the inner layer body 4 and the outer layer body 5. The inner layer 4 has a flexible bag-shaped accommodating portion (not shown) connected to the inner opening portion 7a and the inner opening portion 7a. The outer layer 5 is connected to the outer mouth portion 7b and the outer mouth portion 7b forming the mouth portion 7 in cooperation with the inner mouth portion 7a, and has flexibility and resilience in the body portion (not shown) and the body portion. It has a continuous bottom (not shown). Further, in the present embodiment, the double container main body 2 is a laminated peeling container (delamination container) in which the inner layer 4 is detachably laminated inside the outer layer 5. As the material of the outer layer body 5 and the inner layer body 4, a resin having low compatibility with each other can be used. Further, although not shown, one or a plurality of adhesive bands extending vertically to partially join the outer layer 5 and the inner layer 4 between the outer layer 5 and the inner layer 4. May be provided.

In the present embodiment, the double container main body 2 is formed by extrusion blow molding (EBM: Extrusion Blow Molding) in which a laminated parison that has been heated and melted is sandwiched between molds and air is blown into the double container body 2 to form a laminated peeling container. There is. Low-density polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene, or the like can be preferably used as the material of the outer layer body 5, and when LDPE is used, particularly high squeeze property (flexibility and restoration) can be used. Gender) can be obtained. Further, as the material of the inner layer 4, ethylene-vinyl alcohol copolymer resin (EVOH) or nylon can be preferably used.

The double container body 2 is not limited to that formed by extrusion blow molding, and is formed, for example, by biaxial stretch blow molding for forming a laminated peeling container from a preform formed in a bottomed tubular shape having a double structure. You may. When a laminated peeling container is formed by biaxial stretch blow molding, polyethylene terephthalate (PET) or polypropylene may be used as the material of the outer layer body 5, and polypropylene or polyethylene terephthalate (PET) may be used as the material of the inner layer body 4. You may use it. The double container main body 2 is not limited to the laminated peeling container, and may be, for example, an outer layer 5 and an inner layer 4 individually formed and assembled.

The mouth portion 7 has a two-stage cylindrical shape including the enlarged diameter portion 8 described later. A male screw 9 serving as an engaging portion with the cap 1 is provided on the outer peripheral surface of the mouth portion 7. The engaging portion with the cap 1 is not limited to the male screw 9, and may be, for example, a locking portion such as an annular convex portion for attaching the cap 1 to the mouth portion 7 by tapping. In the present embodiment, the outside air introduction port 6 is arranged so as to sandwich the central axis O of the mouth portion 7, and is composed of two through holes penetrating the outer port portion 7b. The male screw 9 of the mouth portion 7 is provided with a notch portion 9a that cuts out a portion overlapping the outside air introduction port 6 in the vertical direction. In the present embodiment, the notch 9a constitutes the air passage, but the notch 9a may not be provided and the air passage may be formed by the gap between the male screw 9 and the female screw 14a. A cylindrical enlarged diameter portion 8 that forms a step is provided at the lower end portion of the mouth portion 7. The enlarged diameter portion 8 is provided below the outside air introduction port 6.

The cap 1 includes a cap main body member 10, an inner plug member 11, and a valve member 12 having a discharge valve body 12a and an air valve body 12b. The cap body member 10 has a mounting cylinder wall 14 having a female screw 14a engaged with the male screw 9 of the mouth portion 7 on the inner peripheral surface, and a top surface portion 15 connecting to the mounting cylinder wall 14 and covering the mouth portion 7 from above. It is provided with a lid 16. The lower portion of the mounting cylinder wall 14 is in close contact with the enlarged diameter portion 8 of the mouth portion 7 over the entire circumference. The lid 16 is rotatably connected to the upper end of the mounting cylinder wall 14 via a hinge 17 between a closed position that covers the top surface portion 15 from above and an open position that opens the top surface portion 15. However, the lid 16 may be configured as a member separate from the cap body member 10 that can be moved between the closed position and the open position. The cap body member 10 and the inner plug member 11 may be made of, for example, synthetic resin. The valve member 12 may be made of, for example, synthetic resin or rubber.

The top surface portion 15, the inner plug member 11, and the valve member 12 form a cylindrical discharge cylinder 18 for partitioning the discharge path C1 for discharging the contents. The discharge cylinder 18 has a discharge valve seat 19 provided on the inner plug member 11 on which the discharge valve body 12a can be seated.

The top surface portion 15 has an outside airflow inlet 20 and an air valve seat 21 that surrounds the outside airflow inlet 20 without surrounding the discharge path C1 and on which the air valve body 12b can be seated. The top surface portion 15, the inner plug member 11, and the valve member 12 partition the outside air inflow path C2 from the discharge path C1 and the accommodation space S and allow the outside air to flow in from the outside airflow inlet 20 toward the outside air introduction port 6. There is.

As shown in FIGS. 1 and 5, the inner plug member 11 has a substantially annular plate-shaped outer peripheral edge portion 11a that abuts on the upper surface of the mouth portion 7 and extends in the horizontal direction. The outer peripheral edge portion 11a is provided with four air grooves 15c, which will be described later, provided on the back surface of the top surface portion 15, and four outer peripheral edge portion notches 11f that cut out the outer peripheral surface at positions corresponding to the circumferential direction. Further, the inner plug member 11 has a cylindrical hanging cylinder 11b that hangs down from the outer peripheral edge portion 11a along the inner peripheral surface of the mouth portion 7 and abuts on the inner peripheral surface of the mouth portion 7. An annular shelf portion 11g centered on the central axis O is provided on the upper portion of the inner peripheral surface of the hanging cylinder 11b so as to form a stepped shape whose diameter expands upward. A bottom wall 11c extending in the horizontal direction is connected to the hanging cylinder 11b. A vertical intermediate portion of the lower cylinder wall 11d constituting the lower portion of the discharge cylinder 18 is connected to the bottom wall 11c. The lower cylinder wall 11d has a stepped cylindrical shape centered on the first axis X1 and has a reduced diameter portion at the lower portion and an enlarged diameter portion at the upper portion. The reduced diameter portion has an inverted conical shape, and the upper surface thereof constitutes the discharge valve seat 19. On the upper portion of the inner peripheral surface of the upper and lower intermediate portion of the lower cylinder wall 11d, three grooves 11e capable of forming a gap through which the contents can pass between the lower cylinder wall 11d and the discharge valve body 12a are provided in the circumferential direction of the first axis X1. It is provided at equal intervals. The number, size, arrangement, etc. of the grooves 11e can be appropriately changed according to the viscosity of the contents and the like.

As shown in FIGS. 1 and 2, the top surface portion 15 has a top surface portion 15a extending horizontally from the upper end portion of the mounting cylinder wall 14. On the outer peripheral edge of the bottom surface of the top wall 15a, four protruding step portions 15b having an arcuate planar bottom surface centered on the central axis O are provided at equal intervals in the circumferential direction of the central axis O. ing. The bottom surfaces of the four projecting step portions 15b are in contact with the upper surface of the outer peripheral edge portion 11a of the inner plug member 11, respectively. In this state, the outer peripheral surface of the outer peripheral edge portion 11a of the inner plug member 11 is fitted to the inner peripheral surface of the mounting cylinder wall 14 of the cap main body member 10. The air groove 15c extending in the radial direction of the central axis O is partitioned by the two protruding step portions 15b adjacent to each other in the circumferential direction and the bottom surface of the top wall 15a located between them. That is, four air grooves 15c are provided on the bottom surface of the top surface portion 15 at equal intervals in the circumferential direction of the central axis O. The first axis X1 (central axis of the lower cylinder wall 11d), the central axis O (central axis of the mouth portion 7) and the second axis X2 (central axis of the air valve body 12b) are parallel to each other and are common. It is included in the plane P and is arranged in this description order. Each of the four air grooves 15c is arranged so as to extend in a direction forming an angle of 45 ° with the plane P. In the present embodiment, the inner plug member 11 is integrated with the cap main body member 10 by fitting, but the present invention is not limited to such a configuration, and the inner plug member 11 and the cap main body member 10 are individually mouthed. It may be configured to be attached to 7.

The air valve seat 21 is provided on the bottom surface of the top surface portion 15 and forms an annular shape centered on the second axis X2. Further, the outside airflow inlet 20 is composed of one through hole penetrating the top surface portion 15. The lower end of the outside airflow inlet 20 has a circular shape centered on the second axis X2. The upper end of the outside airflow inlet 20 is open in the horizontal direction toward the hinge 17.

Further, the top wall 15a is connected to the vertical intermediate portion of the tubular upper cylinder wall 15h constituting the upper part of the discharge cylinder 18. The lower part of the upper cylinder wall 15h has a cylindrical shape protruding downward from the top wall 15a. A circular opening 15g centered on the first axis X1 is partitioned by the inner peripheral surface of the upper cylinder wall 15h. A cylindrical sealing cylinder 16b hanging from the top plate 16a of the lid 16 in the closed position is in close contact with the opening 15g over the entire circumference. A discharge port 26, which is an outlet of the discharge path C1, is formed by the upper end portion of the upper cylinder wall 15h.

As shown in FIGS. 1, 3 and 4, the valve member 12 is connected to the intermediate cylinder wall 12c constituting the vertical intermediate portion of the discharge cylinder 18 and the intermediate cylinder wall 12c, and is connected to the bottom surface and the inner plug of the top wall 15a. It has an annular outer frame portion 12d centered on the central axis O sandwiched between the shelf portions 11g of the member 11 and a valve base portion 12e composed of the outer frame portion 12d.

The valve base portion 12e and the air valve body 12b are connected by an air valve elastic portion 12f that urges the air valve body 12b upward. The air valve body 12b has a substantially disk shape centered on the second axis X2 and has a recess in the center of the bottom surface. The valve base portion 12e has a pair of arc-shaped inner frame portions 12g extending in the circumferential direction of the air valve body 12b from the outer frame portion 12d. The air valve elastic portion 12f is composed of four springs 12h in the shape of curved leaf springs arranged at equal intervals in the circumferential direction of the air valve body 12b. The radial outer ends of the second axis X2 in the four springs 12h are the inner peripheral surface of each of the pair of arcuate inner frame portions 12g, the outer peripheral surface of the upper part of the intermediate cylinder wall 12c, and the outer frame portion 12d. It is connected to the inner peripheral surface of each one. The radial inner ends of the second axis X2 of the four springs 12h are connected to the outer peripheral edge of the bottom surface of the air valve body 12b one by one. The intermediate portion of each spring 12h is curved so as to form a U-shape in the cross section including the second axis X2. Two of the four springs 12h are located on the plane P.

The outer frame portion 12d is provided with four air grooves 15c of the top surface portion 15 and four outer frame portion notches 12i notches on the upper surface at positions corresponding to the circumferential direction. The outer peripheral surface of the outer frame portion 12d is in contact with the inner peripheral surface of the shelf portion 11g at the lower portion thereof, and is in contact with the inner peripheral surface of the protruding step portion 15b at the upper portion thereof. In the present embodiment, a notch (outer frame portion notch 12i) constituting a part of the outside air inflow path C2 is provided on the upper surface of the outer frame portion 12d, but instead of such a configuration, a top wall is provided. A groove forming a part of the outside air inflow path C2 may be provided on the bottom surface of the 15a, or a notch forming a part of the outside air inflow path C2 may be provided in the lower part of the outer frame portion 12d and / or the shelf portion 11g. May be good.

The intermediate cylinder wall 12c has a two-stage cylindrical shape in which a lower portion and an upper portion whose diameter is expanded from the lower portion are connected by a step portion. A square rod-shaped discharge valve base portion 12j extending in the horizontal direction along the plane P is connected to the inner peripheral surface of the lower portion of the intermediate cylinder wall 12c. The bottom surface of the discharge valve base portion 12j and the upper surface of the discharge valve body 12a are connected by a discharge valve elastic portion 12k having a curved leaf spring shape that urges the discharge valve body 12a downward. The discharge valve elastic portion 12k has a wave shape extending in the vertical direction when viewed in a direction perpendicular to the plane P. The discharge valve body 12a has a hemispherical shape facing downward. However, the shape of the discharge valve body 12a can be changed as appropriate.

According to the double container cap 1 according to the present embodiment, the inner layer is suppressed by the air valve body 12b by opening the lid 16 and tilting the double container 3 to squeeze the outer layer body 5. The body 4 can be smoothly reduced in volume and deformed, and the contents accommodated in the accommodation space S can be discharged from the discharge port 26 through the discharge path C1. At this time, the discharge path C1 moves away from the discharge valve seat 19 against the urging force of the discharge valve elastic portion 12k due to the pressure increase in the accommodation space S due to the squeeze, and moves to a position where it overlaps with the groove 11e. This allows the contents to pass toward the discharge port 26.

Further, by releasing the squeeze and returning the double container 3 to the upright posture, the discharge valve body 12a is increased by the negative pressure inside the outer layer 5 due to the restoration and the urging force of the discharge valve elastic portion 12k. The contents near the discharge port 26 are pulled back and lowered, and are seated on the discharge valve seat 19. Therefore, it is possible to maintain good airtightness of the accommodation space S while demonstrating the suction back function of suppressing the liquid dripping at the discharge port 26. Further, due to the negative pressure inside the outer layer body 5 due to the restoration, the air valve body 12b descends against the urging force of the air valve elastic portion 12f and separates from the air valve seat 21 to release the outside air. From the airflow inlet 20, the outside air inflow path C2 (including the portion composed of the outer frame portion notch 12i and the air groove 15c), the outer peripheral edge portion notch 11f, the outer peripheral surface of the mouth portion 7, and the mounting cylinder wall 14. Since it can be introduced between the inner layer 4 and the outer layer 5 through the gap between the inner peripheral surface and the outside air introduction port 6, the outer layer 5 can be introduced while maintaining the volume reduction deformation of the inner layer 4. Can be restored.

Further, in the double container cap 1 according to the present embodiment, a tubular discharge cylinder 18 for partitioning the discharge path C1 is formed by the top surface portion 15, the inner plug member 11, and the valve member 12 of the cap body member 10. The top surface portion 15 is provided with an air valve seat 21 that surrounds the outside airflow inlet 20 without surrounding the discharge path C1. Therefore, the cap 1 can be miniaturized in the radial direction.

Further, in the double container cap 1 according to the present embodiment, since the inner plug member 11 has an annular plate-shaped outer peripheral edge portion 11a, the cap 1 can be miniaturized in the vertical direction.

Further, in the double container cap 1 according to the present embodiment, the inner plug member 11 hangs down from the outer peripheral edge portion 11a along the inner peripheral surface of the mouth portion 7, the hanging cylinder 11b, the bottom wall 11c, and the lower cylinder wall 11d. Since the valve member 12 has an intermediate cylinder wall 12c constituting an intermediate portion in the vertical direction of the discharge cylinder 18, the cap 1 can be effectively miniaturized in the vertical direction.

Further, in the double container cap 1 according to the present embodiment, since the valve member 12 has the discharge valve body 12a and the air valve body 12b, the valve body for the discharge path C1 and the outside air inflow path C2 The valve body for the purpose can be composed of one member. Therefore, it is possible to reduce the number of parts and improve the assembly workability.

Further, in the double container cap 1 according to the present embodiment, the valve member 12 has a valve base portion 12e composed of an intermediate cylinder wall 12c and an outer frame portion 12d, an air valve body 12b, and an air valve elastic portion 12f. Since it has and, it is possible to stably suppress air leakage when squeezing the outer layer body 5, and it is possible to obtain good squeeze performance.

Further, in the double container cap 1 according to the present embodiment, the four springs 12h constituting the air valve elastic portion 12f are 1 in each of the pair of inner frame portions 12g, the intermediate cylinder wall 12c, and the outer frame portion 12d. Since they are connected one by one, it is possible to reduce the size while ensuring good squeeze performance.

Further, in the double container cap 1 according to the present embodiment, since the valve member 12 has the discharge valve base portion 12j and the discharge valve elastic portion 12k, the suction is in addition to the good airtightness of the accommodation space S. You can also get a back function.

Next, the double container cap according to the second embodiment of the present invention will be described in detail. As shown in FIG. 6, the double container cap 30 (hereinafter, also referred to as a cap 30) according to the present embodiment is attached to the mouth portion 7 of the double container main body 2 having the same configuration as that of the first embodiment. When attached, it constitutes a double container 31. Further, the cap 30 includes a cap main body member 10 having the same configuration as that of the first embodiment, and an inner plug member 32 and a valve member 33 having a configuration different from that of the first embodiment. .. The double container main body 2 and the cap main body member 10 can be changed in the same manner as in the case of the first embodiment.

The top surface portion 15, the inner plug member 32, and the valve member 33 form a cylindrical discharge cylinder 34 for partitioning the discharge passage C1'for discharging the contents. The discharge cylinder 34 has a discharge valve seat 35 provided on the inner plug member 32 and on which the discharge valve body 33a can be seated.

The outside air inflow path C2'is separated from the discharge path C1'and the accommodation space S by the top surface portion 15, the inner plug member 32, and the valve member 33, and the outside air flows in from the outside airflow inlet 20 toward the outside air introduction port 6. Has been done.

As shown in FIGS. 6 and 8, the inner plug member 32 has a substantially annular plate-shaped outer peripheral edge portion 32a that abuts on the upper surface of the mouth portion 7 and extends in the horizontal direction. The outer peripheral edge portion 32a is provided with four air grooves 15c provided on the back surface of the top surface portion 15 and four outer peripheral edge portion notches 32f that cut out the outer peripheral surface at positions corresponding to the circumferential direction. The bottom surfaces of the four protruding steps 15b of the top wall 15a are in contact with the upper surface of the outer peripheral edge portion 32a of the inner plug member 32, respectively. In this state, the outer peripheral surface of the outer peripheral edge portion 32a of the inner plug member 32 is fitted to the inner peripheral surface of the mounting cylinder wall 14 of the cap main body member 10.

The first axis X1'(the central axis of the lower cylinder wall 32d), the central axis O (the central axis of the mouth 7) and the second axis X2'(the central axis of the air valve body 33b) are parallel to each other and It is included in the common plane P'and is arranged in this order of description. Each of the four air grooves 15c is arranged so as to extend in a direction forming an angle of 45 ° with the plane P'. In the present embodiment, the inner plug member 32 is integrated with the cap main body member 10 by fitting, but the present invention is not limited to such a configuration, and the inner plug member 32 and the cap main body member 10 are individually mouthed. It may be configured to be attached to 7.

Further, the inner plug member 32 has a cylindrical hanging cylinder 32b that hangs down from the outer peripheral edge portion 32a along the inner peripheral surface of the mouth portion 7 and abuts on the inner peripheral surface of the mouth portion 7. A bottom wall 32c extending in the horizontal direction is connected to the hanging cylinder 32b. A vertical intermediate portion of the lower cylinder wall 32d constituting the lower portion of the discharge cylinder 34 is connected to the bottom wall 32c. The lower cylinder wall 32d has a substantially cylindrical shape centered on the first axis X1'and having an annular inward flange at the lower end. The upper surface of the inward flange constitutes the discharge valve seat 35. The inner peripheral surface of the lower cylinder wall 32d has an inverted conical shape that slightly expands in diameter upward. On the bottom wall 32c, a bottomed cylindrical accommodating wall 32h centered on the second axis X2'is vertically installed. The accommodation wall 32h is adjacent to the lower cylinder wall 32d. The inner plug member 32 may be made of, for example, a synthetic resin.

The air valve seat 21 provided on the bottom surface of the top surface portion 15 has an annular shape centered on the second axis X2'. Further, the upper cylinder wall 15h connected to the top wall 15a constitutes the upper part of the discharge cylinder 34.

As shown in FIGS. 6 to 7, the valve member 33 is connected to the intermediate cylinder wall 33c constituting the vertical intermediate portion of the discharge cylinder 34 via the connecting portion 33l and to the accommodating wall 32h. It has a cylindrical air valve base 33 m, which is press-fitted and accommodated. The intermediate cylinder wall 33c has a cylindrical shape with an enlarged inner peripheral surface at the lower portion. The lower part of the intermediate cylinder wall 33c is in close contact with the upper part of the lower cylinder wall 32d from the outer peripheral side over the entire circumference. The upper part of the intermediate cylinder wall 33c is in close contact with the lower part of the upper cylinder wall 15h hanging from the top wall 15a from the outer peripheral side to the entire circumference. An alignment portion 32i that engages with the air valve base 33m is provided on the inner peripheral surface of the accommodation wall 32h in order to align the air valve base 33m in the circumferential direction of the accommodation wall 32h. In the present embodiment, the alignment portion 32i is composed of a convex portion that engages with a concave portion provided on the outer peripheral surface of the air valve base portion 33m. However, the shape of the alignment portion 32i and the engaged portion of the air valve base 33m can be appropriately changed. For example, the alignment portion 32i is a concave portion and the engaged portion of the air valve base 33m is a convex portion. May be good.

Further, the valve member 33 has an air valve body 33b that can be seated on the air valve seat 21. The air valve body 33b has a substantially disk shape centered on the second axis X2'and has a recess in the center of the bottom surface. The air valve base 33m and the air valve body 33b are connected by an air valve elastic portion 33f in the shape of a coil spring whose diameter is slightly reduced toward the upper side of the row. However, the number of rows of the air valve elastic portion 33f may be two or more (that is, one composed of two or more coil springs having a common central axis). The air valve body 33b is arranged concentrically with the accommodation wall 32h. Further, the bottom surface of the air valve base 33m is in contact with the upper surface of the accommodating wall 32h, and the upper surface of the air valve body 33b is in contact with the air valve seat 21.

Further, the valve member 33 is a coil spring-shaped discharge valve that connects the intermediate cylinder wall 33c and the discharge valve body 33a and slightly reduces the diameter toward the lower side of the one that urges the discharge valve body 33a downward. It has an elastic portion 33k. The valve member 33 may be made of, for example, synthetic resin or rubber.

According to the double container cap 30 according to the present embodiment, the inner layer is suppressed by the air valve body 33b by opening the lid 16 and tilting the double container 31 to squeeze the outer layer body 5. The body 4 can be smoothly reduced in volume and deformed, and the contents accommodated in the accommodation space S can be discharged from the discharge port 26 through the discharge path C1'. At this time, in the discharge path C1', the discharge valve body 33a separates from the discharge valve seat 35 against the urging force of the discharge valve elastic portion 33k due to the pressure increase in the accommodation space S due to the squeeze, so that the contents are discharged. It can be passed towards 26.

Further, by releasing the squeeze and returning the double container 31 to the upright posture, the discharge valve body 33a is increased by the negative pressure inside the outer layer 5 due to the restoration and the urging force of the discharge valve elastic portion 33k. The contents near the discharge port 26 are pulled back and lowered, and are seated on the discharge valve seat 35. Therefore, it is possible to maintain good airtightness of the accommodation space S while demonstrating the suction back function of suppressing the liquid dripping at the discharge port 26. Further, due to the negative pressure inside the outer layer body 5 due to the restoration, the air valve body 33b descends against the urging force of the air valve elastic portion 33f and separates from the air valve seat 21 to release the outside air. From the airflow inlet 20, between the outside air inflow path C2'(including the portion composed of the air groove 15c), the notch 32f at the outer peripheral edge portion, and the outer peripheral surface of the mouth portion 7 and the inner peripheral surface of the mounting cylinder wall 14. Since it can be introduced between the inner layer 4 and the outer layer 5 through the gap and the outside air introduction port 6, the outer layer 5 can be restored while maintaining the volume reduction deformation of the inner layer 4. ..

Further, in the double container cap 30 according to the present embodiment, a tubular discharge cylinder 34 for partitioning the discharge path C1'is formed by the top surface portion 15 of the cap body member 10, the inner plug member 32, and the valve member 33. The top surface portion 15 is provided with an air valve seat 21 that surrounds the outside airflow inlet 20 without surrounding the discharge path C1'. Therefore, the cap 30 can be miniaturized in the radial direction.

Further, in the double container cap 30 according to the present embodiment, since the inner plug member 32 has an annular plate-shaped outer peripheral edge portion 32a, the cap 30 can be miniaturized in the vertical direction.

Further, in the double container cap 30 according to the present embodiment, the inner plug member 32 hangs down from the outer peripheral edge portion 32a along the inner peripheral surface of the mouth portion 7, the hanging cylinder 32b, the bottom wall 32c, and the lower cylinder wall 32d. Since the valve member 33 has an intermediate cylinder wall 33c constituting the vertical intermediate portion of the discharge cylinder 34, the cap 30 can be effectively miniaturized in the vertical direction.

Further, in the double container cap 30 according to the present embodiment, since the valve member 33 has the discharge valve body 33a and the air valve body 33b, the valve body for the discharge path C1'and the outside air inflow path C2. The valve body for'can be composed of one member. Therefore, it is possible to obtain cost saving and good assembly workability with a small number of parts.

Further, in the double container cap 30 according to the present embodiment, the inner plug member 32 has an accommodating wall 32h, and the valve member 33 is connected to the intermediate cylinder wall 33c and is accommodated in the accommodating wall 32h. Since it has 33 m, an air valve body 33b, and an air valve elastic portion 33f, air leakage can be stably suppressed when the outer layer body 5 is squeezed, and good squeeze performance can be obtained.

Further, in the double container cap 30 according to the present embodiment, since the alignment portion 32i is provided on the inner peripheral surface of the accommodating wall 32h, good workability when assembling the valve member 33 to the inner plug member 32 is good. Can be obtained.

Further, in the double container cap 30 according to the present embodiment, since the air valve elastic portion 33f has a coil spring shape, it is possible to reduce the size while ensuring good squeeze performance.

Further, in the double container cap 30 according to the present embodiment, since the valve member 33 has the discharge valve elastic portion 33k, it is possible to obtain a suction back function in addition to the good airtightness of the accommodation space S. can.

It goes without saying that the above-described embodiment is merely an example of the embodiment of the present invention and can be variously modified without departing from the gist of the invention.

1 Cap for double container 2 Double container body 3 Double container 4 Inner layer 5 Outer layer 6 Outside air inlet 7 Port 7a Inner port 7b Outer port 8 Enlarged diameter 9 Male screw 9a Notch 10 Cap body member 11 Inner plug member 11a Outer peripheral edge 11b Hanging cylinder 11c Bottom wall 11d Lower cylinder wall 11e Groove 11f Outer peripheral edge notch 11g Shelf 12 Valve member 12a Discharge valve body 12b Air valve body 12c Intermediate cylinder wall 12d Outer frame part 12e Valve Base 12f Air valve elastic part 12g Inner frame part 12h Spring 12i Outer frame part Notch 12j Discharge valve base part 12k Discharge valve elastic part 14 Mounting cylinder wall 14a Female screw 15 Top surface part 15a Top wall 15b Protruding step part 15c Air groove 15g Opening 15h Cylinder wall 16 Lid 16a Top plate 16b Encapsulation cylinder 17 Hinge 18 Discharge cylinder 19 Discharge valve seat 20 External air flow inlet 21 Air valve seat 26 Discharge port 30 Double container cap 31 Double container 32 Inner plug member 32a Outer peripheral edge 32b Hanging cylinder 32c Bottom wall 32d Lower cylinder wall 32f Outer peripheral edge notch 32h Storage wall 32i Alignment part 33 Valve member 33a Discharge valve body 33b Air valve body 33c Intermediate cylinder wall 33f Air valve elastic part 33k Discharge valve elastic part 33l Part 33m Air valve base 34 Discharge cylinder 35 Discharge valve seat S Containment space C1, C1'Discharge path C2, C2'Outside air inflow path O Central axis X1, X1'First axis X2, X2'Second axis P, P'Flat

Claims (10)

A volume-reducing deformable inner layer that forms a storage space for the contents, an outer layer that surrounds the inner layer, and outside air that is provided at the tubular mouth and introduces outside air between the inner layer and the outer layer. A double container cap attached to the mouth of a double container body provided with an introduction port.
A cap body member having a mounting cylinder wall that engages with the outer peripheral surface of the mouth portion and a top surface portion that connects to the mounting cylinder wall and covers the mouth portion from above.
An inner plug member arranged between the mouth portion and the top surface portion,
A valve member having a discharge valve body and an air valve body,
A cylindrical discharge cylinder for partitioning a discharge path for discharging the contents is formed by the top surface portion, the inner plug member, and the valve member.
The discharge cylinder has a discharge valve seat provided on the inner plug member and on which the discharge valve body can be seated.
The top surface portion has an outside airflow inlet and an air valve seat that surrounds the outside airflow inlet without surrounding the discharge path and on which the air valve body can be seated.
The top surface portion, the inner plug member, and the valve member separate the discharge path and the accommodation space, and partition the outside air inflow path for allowing outside air to flow in from the outside air flow inlet toward the outside air introduction port.
Double container cap. The double container cap according to claim 1, wherein the inner plug member has an annular plate-shaped outer peripheral edge portion that abuts on the upper surface of the mouth portion and extends in the horizontal direction. The inner plug member includes a tubular hanging cylinder that hangs down from the outer peripheral edge portion along the inner peripheral surface of the mouth portion, a bottom wall that connects to the hanging cylinder, and a discharge cylinder that connects to the bottom wall and the discharge cylinder. Has a lower cylinder wall, which constitutes the lower part of the
The valve member has an intermediate cylinder wall that constitutes a vertical intermediate portion of the discharge cylinder.
The double container cap according to claim 2. The inner plug member has a bottomed cylindrical accommodating wall that hangs down from the bottom wall.
The valve member is connected to the intermediate tubular wall and has a tubular air valve base accommodated in the accommodating wall, and the air valve base and the air valve body are connected to each other and the air valve body is attached upward. With an elastic part of the air valve,
The double container cap according to claim 3. The fourth aspect of the present invention, wherein the inner peripheral surface of the accommodating wall is provided with an alignment portion that engages with the air valve base portion in order to align the air valve base portion in the circumferential direction of the accommodating wall. Double container cap. The double container cap according to claim 4 or 5, wherein the elastic portion of the air valve has one or more coil spring shapes. The valve member includes a valve base portion connected to the intermediate cylinder wall and the intermediate cylinder wall and composed of an annular outer frame portion sandwiched between the top surface portion and the inner plug member, and the valve base portion and the air. The double container cap according to claim 3, further comprising an air valve elastic portion that connects the valve body and urges the air valve body upward. The air valve body has a substantially disk shape and has a substantially disc shape.
The valve base portion has a pair of arcuate inner frame portions extending in the circumferential direction of the air valve body from the outer frame portion.
The air valve elastic portion is composed of four springs in the shape of curved leaf springs arranged at equal intervals in the circumferential direction of the air valve body.
The double container cap according to claim 7, wherein the four springs are connected to each of the pair of arcuate inner frame portions, the intermediate cylinder wall, and the outer frame portion one by one. .. The valve member is a discharge valve having one or more coil springs that connects the intermediate cylinder wall constituting the vertical intermediate portion of the discharge cylinder and the discharge valve body and urges the discharge valve body downward. The double container cap according to any one of claims 1 to 8, which has an elastic portion. The valve member connects a discharge valve base portion connected to an intermediate cylinder wall constituting the vertical intermediate portion of the discharge cylinder, the discharge valve base portion and the discharge valve body, and urges the discharge valve body downward. The double container cap according to any one of claims 1 to 8, further comprising a curved leaf spring-shaped discharge valve elastic portion.

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