JP6929598B2 - Double container - Google Patents

Description

The present invention relates to a double container including an inner layer body that can be reduced in volume and deformable, and an outer layer body in which the inner layer body is arranged inside.

As a container for accommodating cosmetics such as lotion, shampoo, rinse or liquid soap, and food seasonings, an inner layer body that can accommodate such liquid and is provided so that the volume can be reduced and deformed, and this inner layer body are used. A double container (also referred to as a delamination container or a laminated peeling container) having an outer layer body that is housed inside and forms the outer shell of the container is known. In one example of such a double container, a cap for a double container is provided at the mouth of the outer layer body with a pouring cylinder for pouring out the contents and a valve body for preventing the intrusion of outside air into the inner layer body. Hereinafter, a cap (which may be simply referred to as a "cap") is attached (for example, Patent Document 1). Then, by pressing the outer layer body, the inner layer body is pressurized through the air between the outer layer body and the inner layer body, thereby opening the valve body and pouring out the contents. Further, the outer layer body is provided with an outside air introduction hole for taking in outside air between the outer layer body, and when the outer layer body is restored to its original shape after pouring, the outside air is taken in from this outside air introduction hole and the inner layer is formed. Only the outer layer is restored while the body remains deformed.

Japanese Unexamined Patent Publication No. 2016-193736

However, in the double container described in Patent Document 1, when the cap is rotated in the circumferential direction during use to release the screw engagement between the cap and the mouth of the outer layer body, the cap is disengaged from the container and inside the inner layer body. There was a risk that air would enter the container and the quality of the contents inside the inner layer would be impaired, or that the inner layer would be restored and the good discharge of the contents would be impaired.

An object of the present invention is to solve such a problem, and an object of the present invention is to restrict the removal of a cap once attached to a container to suppress the introduction of air into the inner layer. We are in the process of proposing a double container that can be used.

The double container of the present invention
An outer layer having a mouth, a body, and a bottom and forming an outer shell of a container, an inner layer housed inside the outer layer and forming a storage space for contents, and an outer layer formed on the outer layer. A container body having an air introduction hole to be provided, and capable of introducing air from the air introduction hole into an internal space formed between the outer layer body and the inner layer body as the inner layer body is reduced in volume.
It is equipped with a cap body that is attached to the mouth.
The cap body and the mouth portion, possess at least a pair of rotating engaging portions for fixing both the rotation engagement, and at least a pair of detent portions formed above the該回Dogakarigo portion ,
The at least pair of rotary engaging portions has a male screw portion provided on the mouth portion and a female screw portion provided on the cap body and capable of screw engagement with the male screw portion, and the female screw portion has a circumferential. It is formed intermittently in the direction and
The detent portion on the cap body side of at least the pair of detent portions is intermittently formed in the circumferential direction, and is characterized in that the detent portion is formed at a position in the circumferential direction in which the female screw portion is provided. do.

Further, in the above configuration, the double container of the present invention preferably has at least one pair of detent portions having a ratchet mechanism having at least one ratchet gear.

Further, in the double container of the present invention, in the above configuration, it is preferable that at least the pair of detent portions are at least a pair of undercut engaging portions.

Further, in the double container of the present invention, in the above configuration, the air introduction hole is preferably a through hole formed below at least the pair of rotation engaging portions.

Further, in the above configuration, the double container of the present invention has a check valve that blocks communication between the inner layer and the outside, and is opened by a pressure increase in the inner layer to supply the contents to the outside. Is preferable.

According to the present invention, it is possible to propose a double container capable of suppressing the introduction of air into the inner layer by restricting the removal of the cap once attached to the container.

It is a front sectional view of the double container which concerns on 1st Embodiment of this invention. FIG. 1 is a cross-sectional view taken along the line AA in FIG. FIG. 1 is a plan view (a) and a front view (b) of the mouth portion of the container body in FIG. 1 is a front half cross-sectional view of the cap body in FIG. 1, and is a cross-sectional view taken along the line BB in (b) and (a). It is a partially enlarged sectional view which shows the modification of the pair of detent portions in the double container which concerns on 1st Embodiment of this invention. It is a front sectional view of the double container which concerns on 2nd Embodiment of this invention.

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

The double container according to the first embodiment of the present invention will be illustrated and described in detail with reference to FIGS. 1 to 4. In the present specification, claims, abstracts and drawings, the upper side in FIG. 1 is the upper side and the lower side is the lower side based on the upright state of the container.

As shown in FIG. 1, the double container 100 according to the present embodiment includes a container body 1, a cap body 14 that can be attached to and detached from the mouth 4a of the container body 1, and a pump that is attached to the container body 1 by the cap body 14. 8. It includes a ring member 11 arranged adjacent to the upper side of the cap body 14, and a head portion 5 provided with a nozzle cylinder 6 for pouring out the contents.

In the present embodiment, the container body 1 has a mouth portion 4a, a body portion that is formed wider than the mouth portion 4a and extends in the vertical direction, and a bottom portion (not shown) that closes the lower portion of the body portion. A male screw portion 4b (rotational engagement portion) is provided on the outer peripheral surface of the mouth portion 4a so as to screw-engage with the female screw portion 14b (rotational engagement portion) provided on the inner peripheral surface of the cap body 14. It is configured in. Further, in the present embodiment, the ratchet gear 4r (rotation stop portion) is formed above the male screw portion 4b. As will be described later, the ratchet gear 4r meshes with the ratchet gear 14r (rotation stop portion) formed on the inner peripheral surface of the cap body 14, so that the male screw portion 4b and the female screw portion 14b once fastened are engaged with each other. It constitutes a ratchet mechanism that regulates the rotation of the cap body 14 in the loosening direction.

In the present embodiment, both the inner layer body 3 and the outer layer body 4 constituting the container body 1 are made of synthetic resin, and resins having low compatibility with each other are used. Further, the container body 1 is formed by blow molding a parison formed by laminating the synthetic resin material of the inner layer 3 and the synthetic resin material of the outer layer 4. Further, although not shown, one or a plurality of adhesive bands extending in the vertical direction and partially joining the inner layer 3 and the outer layer 4 between the inner layer 3 and the outer layer 4. May be provided.

The inner layer body 3 is formed so as to be deformable in volume reduction, and in the present embodiment, it is obtained by peeling the container body 1 formed in a laminated state from the outer layer body 4. As shown in FIG. 1, the inner layer 3 includes a storage space S1 for accommodating the contents and an upper opening 3a connected to the accommodation space S1.

The outer layer 4 is provided with an air introduction hole 4c at the mouth 4a for taking in air between the outer layer 4 and the inner layer 3. As shown in FIG. 1, the air introduction hole 4c is a through hole that penetrates only the outer layer body 4, and does not penetrate the inner layer body 3.

The container body 1 may be formed by biaxially stretching blow molding a preform having a laminated structure previously formed by injection molding or the like. Further, the container body 1 may be formed by forming the outer layer body 4 and the inner layer body 3 separately and then combining them. Further, the container body 1 may have another structure as long as the inner layer body 3 has a structure capable of reducing the volume and deforming.

The cap body 14 is a member for assembling and fixing the manually pushed-down pump 8 to the container body 1. As described above, the cap body 14 has a female screw portion 14b on the inner peripheral surface, and is fixed by screw engaging with the male screw portion 4b provided on the outer peripheral surface of the mouth portion 4a of the container body 1. Can be done. Further, a ratchet gear 14r is formed above the female screw portion 14b, and by engaging with the ratchet gear 4r described above, the cap body 14 can be rotated in a direction in which the screw engagement between the male screw portion 4b and the female screw portion 14b is loosened. It is regulated. That is, the ratchet gears 4r and 14r form a pair of detent portions.

FIG. 2 is a cross-sectional view taken along the AA cross section in the vicinity of the ratchet gears 4r and 14r in FIG. As shown in FIG. 2, the ratchet gear 4r on the container body 1 side is substantially orthogonal to the circumferential direction, and the meshing surface that meshes with the opposing ratchet gear 14r when the cap body 14 is turned counterclockwise in a plan view. It has 4s and an overcoming surface 4t that is gently inclined with respect to the circumferential direction and can get over the opposite ratchet gear 14r when the cap body 14 is turned clockwise in a plan view. Similarly, the ratchet gear 14r on the cap body 14 side is substantially orthogonal to the circumferential direction, and when the cap body 14 is turned counterclockwise in a plan view, the meshing surface 14s that meshes with the opposing ratchet gear 4r and the circumference. It has an overcoming surface 14t that is gently inclined with respect to the direction and can get over the opposite ratchet gear 4r when the cap body 14 is turned clockwise in a plan view.

The pair of detent portions is not limited to the mode in which the two ratchet gears 4r and 14r are arranged to face each other as described above. The pair of detent portions have, for example, a ratchet gear 4r formed on the container body 1 side and a meshing surface formed on the cap body 14 side facing the meshing surface 4s, and rotates radially outward of the ratchet gear 4r. It may be composed of a claw portion that can rotate around an axis. That is, the pair of detent portions need only have at least one ratchet gear. Further, the pair of detent portions may have another configuration capable of restricting the movement of the cap main body 14 when the cap main body 14 is to be turned counterclockwise in a plan view.

3 (a) and 3 (b) are an enlarged plan view and an enlarged front view of the mouth portion 4a of the container body 1, respectively. As shown in FIG. 3A, three ratchet gears 4r are continuously formed at two opposing positions in the circumferential direction at a predetermined pitch. Further, the diameter of the outer peripheral surface of the ratchet gear 4r is configured to be smaller than the valley diameter of the male screw portion 4b. As a result, when the cap body 14 is attached to the container body 1, the female screw portion 14b on the cap body 14 side is prevented from coming into contact with the ratchet gear 4r as much as possible.

4 (a) and 4 (b) are a front view of the cap body 14 and a cross-sectional view taken along the line BB, respectively. As shown in FIG. 4B, three ratchet gears 14r are continuously formed at four locations in the circumferential direction at a predetermined pitch. By providing the ratchet gear 14r in a region larger than that of the ratchet gear 4r on the container body 1 side in this way, the screw engaging portions (male screw portion 4b, female screw portion 14b) of the container body 1 or the cap body 14 are elastic. The ratchet gears 4r and 14r are configured to be able to mesh with each other even if the fastening position is changed due to deformation or the like.

The pump 8 is an example of a pump generally used conventionally, and by pressing the head portion 5 and pushing down the stem 9, the contents in the container body 1 are sucked up and attached to the tip of the nozzle cylinder 6. It can be dispensed from the provided spout 7. As shown in FIG. 1, a flange 32 extending radially outward from the upper end of the cylinder wall 31 of the cylinder 30 forming the outer shape of the pump 8 is formed between the top wall 14c of the cap body 14 and the upper end 4a of the mouth portion 4a of the container body 1. By being sandwiched between the pumps 8, the pump 8 is attached and fixed to the mouth portion 4a of the container body 1 together with the cap body 14. A packing 35 made of rubber or the like is arranged between the flange 32 and the upper end of the mouth portion 4a to improve the airtightness inside the container body 1.

A ring member 11 is arranged adjacent to the upper part of the cap body 14. As shown in FIG. 1, the ring member 11 is arranged radially inside the top wall 11t extending outward in the radial direction, the outer peripheral wall 11a hanging from the outer peripheral end of the top wall 11t, and the outer peripheral wall 11a, and is a cylinder. It is provided with an inner peripheral wall 11b that undercuts and engages with an engaging cylinder 33 extending upward from the flange 32 of 30 and an inner peripheral wall 11d that is arranged radially inside the inner peripheral wall 11b and accommodates a stem 9 and the like. .. As shown in FIG. 1, the outer peripheral wall 11a, the middle peripheral wall 11b, and the inner peripheral wall 11d are all provided so as to hang downward from the top wall 11t. Engagement between the engaging cylinder 33 of the cylinder 30 and the inner peripheral wall 11b of the ring member 11 is such that the engaging protrusion 33a of the engaging cylinder 33 is undercut on the protruding portion 11c formed on the inner peripheral surface of the inner peripheral wall 11b. It is done by matching. At this time, the ribs 33b intermittently provided on the inner peripheral surface of the engaging cylinder 33 in the circumferential direction enter between the ribs 11e intermittently formed on the outer peripheral surface of the inner peripheral wall 11d in the circumferential direction. , The ring member 11 is also fixed in the circumferential direction with respect to the cylinder 30. As a result, the ring member 11 and the cylinder 30 are firmly fixed in the vertical direction and the circumferential direction.

A male screw portion 11s is formed on the upper outer peripheral surface of the inner peripheral wall 11d of the ring member 11. As shown in FIG. 1, the male screw portion 11s lowers the head portion 5 by screw engaging with the female screw portion 5a formed under the peripheral wall 5c of the head portion 5 in the unused state of the double container 100. It is fixed in the state of being moved to. An inner peripheral wall 5b is formed inside the peripheral wall 5c in the head portion 5 in the radial direction. The inner peripheral wall 5b is undercut engaged with the inner peripheral surface of the stem 9, and together with the rib 5e, the pressing force from the head portion 5 is transmitted to the pump 8 through the stem 9.

From the state of FIG. 1, when using the contents, the user rotates the head portion 5 around an axis and screw-engages the male screw portion 11s of the ring member 11 with the female screw portion 5a of the head portion 5. To cancel. After the head portion 5 urged upward reaches the upper end of the movable portion, the user presses the head portion 5 downward several times. As a result, the pump 8 can be operated, the contents in the inner layer body 3 can be pumped upward through the stem 9, and can be ejected to the outside from the injection port 7 via the inside of the nozzle cylinder 6.

The volume of the inner layer 3 is reduced and deformed by pouring out the contents in the inner layer 3, while the outer layer 4 maintains its shape due to its own rigidity, so that the volume of the space between the outer layer 4 and the inner layer 3 is maintained. Increases and becomes negative pressure. Therefore, in FIG. 1, the air flowing in from the gap between the lower end of the cap body 14 and the container body 1 is introduced into the space between the outer layer 4 and the inner layer 3 via the air introduction hole 4c. As a result, the inner layer 3 can maintain the state of being reduced in volume and deformed according to the remaining amount of the contents, so that the quality of the contents in the inner layer 3 can be improved without air entering the inner layer 3. Can be maintained well.

In the present embodiment, air is introduced into the space between the outer layer 4 and the inner layer 3 from the air introduction hole 4c formed in the mouth 4a of the container body 1, but in this embodiment, the air is introduced into the space between the outer layer 4 and the inner layer 3. Not limited. The air introduction hole 4c may be realized by using a slit formed in the pinch-off portion of the bottom portion formed by blow molding instead of forming the air introduction hole 4c in the mouth portion 4a.

Further, in the present embodiment, it is configured to have a pair of rotary engaging portions (male screw portion 4b, female screw portion 14b) and a pair of detent portions (ratchet gears 4r, 14r), but the present embodiment is limited to this embodiment. Instead, it may be configured to have two or more pairs of rotary engaging portions or two or more pairs of detent portions.

As described above, in the present embodiment, in the double container 100 configured such that the cap main body 14 is attached to the mouth portion 4a together with the pump 8 for pumping the contents from the inner layer body 3, the cap main body 14 and the cap main body 14 and the cap main body 14 The mouth portion 4a of the container body 1 has a pair of screw engaging portions (male screw portion 4b and female screw portion 14b) for fixing the two by screw engagement, and a pair of detent portions formed above the screw engaging portion. Was configured to have. As a result, the rotation of the cap body 14 in the circumferential direction can be restricted while the cap body 14 is screwed to the container body 1, and the opening torque of the cap body 14 can be significantly increased. Therefore, it is possible to prevent air from coming into contact with the contents in the inner layer 3 by accidentally opening the cap body 14 while using the double container 100.

The rotation regulation of the cap body 14 referred to here means that the removal of the cap body 14 is suppressed unless the cap body 14 is rotated with a large force that deforms the ratchet gears 4r and 14r. Should be understood.

Further, in the present embodiment, since the detent portions (ratchet gears 4r and 14r) are provided above the screw engaging portions (male screw portion 4b and female screw portion 14b), the cap body 14 below the screw engaging portion is provided. Air can be stably introduced from the gap between the lower end portion and the container body 1.

Further, in the present embodiment, the ratchet gears 4r and 14r are provided as the detent portion. As a result, the opening of the cap body 14 can be effectively suppressed with a simple configuration.

Further, in the present embodiment, the air introduction hole 4c is formed as a through hole below the pair of screw engaging portions (male screw portion 4b and female screw portion 14b). As a result, air can be stably introduced from the gap between the lower end of the cap body 14 and the container body 1.

FIG. 5 is a diagram showing a modified example of the pair of detent portions of the present embodiment. In the example of FIG. 5, a pair of undercut engaging portions (protruding portion 4u, engaging protrusion 14u) are formed as the detent portions instead of the ratchet gears 4r and 14r. When the cap body 14 was rotated clockwise with respect to the mouth portion 4a of the container body 1 in a plan view to complete the screw engagement between the male screw portion 4b and the female screw portion 14b, it was formed above the male screw portion 4b. The protruding portion 4u projecting outward in the radial direction overcomes the engaging protrusion 14u formed above the female threaded portion 14b and undercuts the engagement (state in FIG. 5). In this state, even if the cap body 14 is rotated counterclockwise, the engaging protrusion 14u cannot easily get over the protruding portion 4u again, so that the cap body 14 is further rotated counterclockwise. I can't let you.

In the example of FIG. 5, the diameter of the outer peripheral surface of the protruding portion 4u is configured to be smaller than the valley diameter of the male screw portion 4b. As a result, when the cap body 14 is attached to the container body 1, the female screw portion 14b on the cap body 14 side is prevented from coming into contact with the protruding portion 4u as much as possible.

As described above, in the modified example of FIG. 5, the undercut engaging portion (protruding portion 4u and engaging protrusion 14u) is provided as a pair of detent portions. As a result, the opening of the cap body 14 can be effectively suppressed with a simple configuration.

Next, the double container according to the second embodiment of the present invention will be described in detail with reference to FIG. In the present specification, claims, abstract and drawings, the upper side in FIG. 6 is the upper side and the lower side is the lower side based on the upright state of the container.

FIG. 6 shows the double container 200 of the present embodiment, and shows a state in which the double container cap 101 (hereinafter, referred to as “cap 101”) is attached to a container body 102 compatible with the double container cap 101. The cap 101 is composed of a cap body 110, an inner plug 120, a moving valve body 130, a check valve 140, and a lid body 150. Further, the container body 102 is composed of an inner layer 103 and an outer layer 104.

In the present embodiment, both the inner layer 103 and the outer layer 104 constituting the container body 102 are made of synthetic resin, and resins having low compatibility with each other are used. Further, the container body 102 is formed by blow molding a parison formed by laminating the synthetic resin material of the inner layer 103 and the synthetic resin material of the outer layer 104.

The inner layer 103 is formed so as to be deformable in volume reduction, and in the present embodiment, it is obtained by peeling the container body 102 formed in a laminated state from the outer layer 104. As shown in FIG. 6, the inner layer body 103 includes a storage space S2 for accommodating the contents inside the inner layer body 103, and an upper opening 103a connected to the accommodation space S2.

As shown in FIG. 6, the outer layer body 104 is formed by connecting a body portion having recoverable flexibility and a bottom portion (not shown) that closes the lower end of the body portion to a cylindrical mouth portion 104a. Further, as shown in FIG. 6, a male screw portion 104b (rotational engaging portion) is provided on the outer peripheral surface of the mouth portion 104a. Further, the mouth portion 104a is provided with an air introduction hole 104c for taking in air between the mouth portion 104a and the inner layer body 103. Further, in the present embodiment, the ratchet gear 104r (rotation stop portion) is formed above the male screw portion 104b. As will be described later, the ratchet gear 104r engages with the ratchet gear 111r (anti-rotation portion) formed on the inner peripheral surface of the outer peripheral wall 111 of the cap body 110, thereby engaging with the male screw portion 104b and the female screw portion 112 once fastened. The rotation of the cap body 110 in the direction in which the screw engagement is loosened is restricted.

Next, regarding the cap 101, the cap main body 110 will be described. The cap body 110 includes an outer peripheral wall 111 that surrounds the mouth portion 104a, and a female screw portion 112 (rotational engaging portion) corresponding to the male screw portion 104b of the mouth portion 104a is formed on the inner peripheral surface of the outer peripheral wall 111. Has been done. Further, a ratchet gear 111r is formed above the female screw portion 112, and the cap body 110 can be rotated in a direction in which the screw engagement between the male screw portion 104b and the female screw portion 112 is loosened by engaging with the ratchet gear 104r described above. It is regulated. That is, the ratchet gears 104r and 111r form a pair of detent portions. Since the detailed shapes of the ratchet gears 104r and 111r are similar to those of FIG. 2 of the first embodiment, further description thereof will be omitted here. Further, the top wall 113 is integrally connected to the upper part of the outer peripheral wall 111. A pouring cylinder 114 is provided on the top wall 113, and a pouring hole 114a for pouring out the contents is formed inside the pouring cylinder 114 in the radial direction. Further, on the lower surface of the top wall 113, a pair of upper fitting walls 115 having a concentric double arrangement are provided. Further, an outside air introduction hole 116 penetrating the top wall 113 is provided on the outer side in the radial direction from the upper fitting wall 115. In the present embodiment, a step is provided between the central portion and the outer peripheral portion of the top wall 113 (the height of the outer peripheral portion is lower than that of the central portion), and the step is opened radially outward. The outside air introduction hole 116 is provided. With this configuration, the contents overflowing on the top wall 113 are less likely to enter the outside air introduction hole 116. As shown in FIG. 6, a seal protrusion 111p is formed at the lower end of the outer peripheral wall 111, and the lower end of the outer peripheral wall 111 and the mouth portion 104a are hermetically contacted and sealed. Further, a ventilation path T leading to the air introduction hole 104c is provided between the mouth portion 104a and the outer peripheral wall 111. In the present embodiment, the gap between the male threaded portion 104b and the female threaded portion 112 is used as the ventilation path T. For example, a vertical groove is formed in the male threaded portion 104b, and the vertical groove functions as the ventilation path T. It may be configured as follows.

Further, in the present embodiment, air can pass through the gap between the ratchet gears 104r and 111r. That is, the ratchet gears 104r and 111r of the present embodiment are provided at two locations in the circumferential direction or like the ratchet gears 4r and 14r shown in FIGS. 3 (a) and 3 (b) and 4 (a) and 4 (b). It is formed intermittently at four locations. Therefore, the air introduced from the outside air introduction hole 116 is passed through the space between the intermittently formed ratchet gears 104r and 111r, and further, the outer layer 104 and the inner layer are passed through the air introduction hole 104c through the ventilation passage T. Air can be introduced into the internal space between the body 103. It is sufficient that the gears are intermittently formed in the circumferential direction at at least one of the ratchet gears 104r and 111r.

An inner plug 120 is provided inside the cap body 110. The inner plug 120 is located between the dispensing cylinder 114 and the inner layer body 103, and includes a partition wall 121 that covers the upper opening 103a of the inner layer body 103.

The partition wall 121 is provided with a tubular wall 122 having one end open to the pouring cylinder 114 side and the other end opening to the accommodation space S2 side of the inner layer 103. As shown in FIG. 6, the tubular wall 122 of the present embodiment is provided with a through hole 122a radially outward of the central portion of the partition wall 121, and the cylindrical portion 122b is provided downward from the edge portion of the through hole 122a. Is provided, and a through hole 122d leading to the accommodation space S2 is provided via the inclined portion 122c. Further, the partition wall 121 is provided with a hole (communication port 123) penetrating the partition wall 121 on the inner side in the radial direction from the tubular wall 122.

Further, the partition wall 121 is provided with a step portion 124 that bends to the accommodation space S2 side radially outside the communication port 123, and a groove that opens upward with the step portion 124 is provided radially outside the step portion 124. A fitting wall 125 to be formed is provided. An annular seal wall 126 that sandwiches the inner layer 103 from the outer layer 104 is provided on the lower surface of the partition wall 121. As shown in FIG. 6, at least one groove 127 is provided on the outer edge of the partition wall 121.

Inside the tubular wall 122, a moving valve body 130 which is spherical in the present embodiment is provided. Between the tubular wall 122 and the moving valve body 130, there is a gap such that the moving valve body 130 can move according to the posture change of the container body 102 and the contents hardly pass through (substantially do not pass through). It is provided. Since the discharge cylinder 114 side of the tubular wall 122 is opened by the through hole 122a and the accommodation space S2 side is opened by the through hole 122d, the contents that have entered the tubular wall 122 are the moving valve. It does not interfere with the movement of the body 130. Further, the moving valve body 130 is seated on the inclined portion 122c of the tubular wall 122 by putting the container main body 102 in an upright posture (a posture in which the bottom of the container main body 102 is placed on a horizontal table). Thereby, the accommodation space S2 can be sealed.

A check valve 140 is provided between the cap body 110 and the inner plug 120. The check valve 140 is provided with a plate-shaped valve body 143 connected via three arms 142 inside the annular wall 141 which is cylindrical in the present embodiment, and has a so-called three-point valve form. I'm doing it. Further, when the check valve 140 is attached to the cap body 110 and the inner plug 120 as shown in FIG. 6, the lower portion of the annular wall 141 is fitted and held between the step portion 124 and the fitting wall 125. The upper part of the annular wall 141 is fitted and held by a pair of upper fitting walls 115. As a result, as shown in FIG. 6, an inner space K1 that communicates the communication port 123 and the pouring cylinder 114 to form a flow path for the contents is formed inside the annular wall 141 in the radial direction, and is annular. An outer space K2 is formed on the radial outer side of the wall 141 to form an air flow path by communicating the outside air introduction hole 116 and the groove 127. Further, the valve body 143 has a size that substantially covers the through hole 122a and the communication port 123, and normally sits on the partition wall 121 to close the communication port 123.

As shown in FIG. 6, the lid body 150 is connected to the outer peripheral wall 111 of the cap body 110 via a hinge 151, and is bent by the hinge 151 to cover the pouring cylinder 114 and the outside air introduction hole 116. Can be done. More specifically, the lid body 150 includes a flat plate-shaped upper wall 152 and a lid peripheral wall 153 that is connected to the edge of the upper wall 152 and is connected to the outer peripheral wall 111. Is provided with a tubular sealing portion 154 that enters the inside of the dispensing cylinder 114 when the lid 150 is closed and seals the dispensing cylinder 114. The lid body 150 may be separated from the cap body 110 without providing the hinge 151, and may be mounted on the cap body 110 with screws or undercuts.

In discharging the contents from the cap 101 configured as described above, the lid body 150 shown in FIG. 6 is rotated around the hinge 151 to open, and the container body 102 is changed from the standing posture to the tilted posture. , Press the body of the outer layer 104. As a result, the moving valve body 130 in the tubular wall 122 moves to the pouring cylinder 114 side, and the accommodation space S2 is pressurized through the air in the internal space between the inner layer body 103 and the outer layer body 104. Will be done. The air introduction hole 104c of the outer layer body 104 and the outside air introduction hole 116 of the cap body 110 are connected by a ventilation path T, a gap between the ratchet gears 104r and 111r, a groove 127, and an outer space K2 at all times. It is in an open state. However, since the groove 127 is narrow and resistance is generated when air flows, even if the outer layer 104 is pressed, the air between the inner layer 103 and the outer layer 104 does not leak so much and is accommodated. The pressurization of the space S2 is not hindered. Then, the pressurized content lifts the valve body 143 and flows out from the communication port 123, and is discharged to the outside world from the injection hole 114a via the space beside the arm 142 and the inner space K1. Here, since the communication port 123 is provided in the central portion of the partition wall 121, the flow of the contents around the communication port 123 is equalized, and the turbulence of the liquid when the contents are poured out is suppressed. Further, since the communication port 123 is arranged at the center of the valve body 143, the pressure from the accommodation space S2 is applied to the center of the valve body 143. Therefore, the valve body 143 is less likely to be tilted, and flow turbulence is less likely to occur.

After pouring out the required amount of contents, the pressure on the body of the outer layer 104 is released. As a result, the pressure in the accommodation space S2 is reduced, and the valve body 143 closes the communication port 123, so that it is possible to prevent outside air from entering the accommodation space S2. Further, since the outer layer body 104 tries to return to the original shape by its own restoring force, the internal space between the inner layer body 103 and the outer layer body 104 is in a negative pressure state, which causes the outer layer body 104 to be outside the outside air introduction hole 116. Air is introduced from the air introduction hole 104c through the space K2, the groove 127, the gap between the ratchet gears 104r and 111r, and the ventilation path T, and the outer layer 104 is restored while the inner layer 103 is volume-reduced and deformed.

When the valve body 143 closes the communication port 123, the contents remain in the pouring cylinder 114 and the inner space K1, but when the container body 102 is returned to the original standing posture, the moving valve body 130 Moves to the accommodation space S2 side of the inner layer 103 due to its own weight or a decrease in pressure in the accommodation space S2. As a result, a space is created on the side of the pouring cylinder 114 in the tubular wall 122, so that the contents remaining in the pouring cylinder 114 and the inner space K1 are passed through the space beside the arm 142 to this space. It can be moved to (suckback function) and can effectively prevent dripping.

In the present embodiment, the air is introduced into the internal space via the outside air introduction hole 116, but the present embodiment is not limited to this embodiment. For example, instead of the outside air introduction hole 116 and the air introduction hole 104c, air may be introduced using a slit formed in the pinch-off portion of the bottom formed by blow molding.

Further, in the present embodiment, the ratchet gears 104r and 111r are formed as a pair of detent portions, but the present embodiment is not limited to this embodiment. For example, as in the modified example of the first embodiment shown in FIG. 5, an undercut engaging portion may be formed as a pair of detent portions. In this case, by cutting out a part in the circumferential direction of at least one of the pair of undercut engaging portions, the outside from the outside air introduction hole 116 as in the ratchet gears 104r and 111r of the present embodiment. Air can be introduced from the air introduction hole 104c through the space K2, the groove 127, the gap of the undercut engaging portion, and the ventilation passage T.

Further, in the present embodiment, it is configured to have a pair of rotary engaging portions (male screw portion 104b and female screw portion 112) and a pair of detent portions (ratchet gears 104r, 111r), but the present embodiment is limited to this embodiment. Instead, it may be configured to have two or more pairs of rotary engaging portions or two or more pairs of detent portions.

As described above, in the present embodiment, in the double container 200 provided with the spout hole 114a for pouring out the contents in the inner layer 103 to the outside, the cap main body 110 and the mouth of the container main body 102 are provided. The portion 104a has a pair of screw engaging portions (male screw portion 104b and a female screw portion 112) for fixing the two by screw engagement, and a pair of detent portions (ratchet gears 104r, 111r) formed above the screw engaging portion. ) And. As a result, the rotation of the cap body 110 in the circumferential direction can be restricted while the cap body 110 is screwed to the container body 102, and the opening torque of the cap body 110 can be significantly increased. It is possible to prevent air from coming into contact with the contents in the inner layer 103 by accidentally opening the cap body 110. In particular, in the present embodiment, it is necessary to adopt a configuration in which air is introduced only from the outside air introduction hole 116 formed in the top wall 113 of the cap body 110, and the lower end of the cap body 110 and the container body 102 are sealed by the sealing protrusion 111p. However, by forming a pair of detent portions (ratchet gears 104r, 111r) above the screw engaging portions (male screw portion 104b and female screw portion 112), the seal protrusion 111p is arranged at the lower end of the cap body 110. It becomes easy and the sealing property can be improved.

Further, in the present embodiment, at least one detent portion of the pair of detent portions (ratchet gears 104r, 111r) is configured to be formed intermittently in the circumferential direction. Thereby, the air introduced from the outside air introduction hole 116 can be supplied from the air introduction hole 104c to the internal space between the outer layer body 104 and the inner layer body 103 through the gap in the circumferential direction of the ratchet gears 104r and 111r. ..

Further, in the present embodiment, the check valve 140 is configured to have a check valve 140 that shuts off communication between the inside of the inner layer 103 and the outside, and is opened by a pressure increase in the inner layer 103 to supply the contents to the outside. As a result, the contents can be poured out by increasing the pressure in the inner layer 103 due to the pressing of the body of the container body 102, while further suppressing the inflow of air into the inner layer 103 by releasing the pressing of the body. Therefore, deterioration of the contents in the inner layer 103 can be further suppressed.

Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present disclosure. Therefore, it should be noted that these modifications and modifications are included in the scope of the present invention. For example, the functions included in each component can be rearranged so as not to be logically inconsistent, and a plurality of components can be combined or divided into one. It should be understood that these are also included in the scope of the present invention.

1 Container body 3 Inner layer 3a Upper opening 4 Outer layer 4a Mouth 4b Male thread (rotational engagement)
4c Air introduction hole 4r Ratchet gear (non-rotation part)
4s meshing surface 4t overcoming surface 4u protruding part (non-rotating part)
5 Head part 5a Female thread part 5b Inner peripheral wall 5c Circumferential wall 5e Rib 6 Nozzle cylinder 7 Injection outlet 8 Pump 9 Stem 11 Ring member 11a Outer wall 11b Middle peripheral wall 11c Protrusion part 11d Inner peripheral wall 11e Rib 11s Male threaded part 11t Female thread part (rotary engagement part)
14c Top wall 14r ratchet gear (non-rotation part)
14s Engagement surface 14t Overcoming surface 14u Engagement protrusion (non-rotation part)
30 Cylinder 31 Cylinder wall 32 Flange 33 Engagement cylinder 33a Engagement protrusion 33b Rib 35 Packing 100 Double container 101 Double container cap (cap)
102 Container body 103 Inner layer 103a Upper opening 104 Outer layer 104a Mouth 104b Male threaded part (rotary engaging part)
104c Air introduction hole 104r Ratchet gear (anti-rotation part)
110 Cap body 111 Outer wall 111r Ratchet gear (anti-rotation part)
111p Seal protrusion 112 Female thread part (rotary engagement part)
113 Top wall 114 Outlet cylinder 114a Outlet hole 115 Upper fitting wall 116 Outside air introduction hole 120 Inner plug 121 Partition wall 122 Cylindrical wall 122a Through hole 122b Cylindrical part 122c Inclined part 122d Through hole 123 Communication port 124 Step part 125 Fitting Wall 126 Seal wall 127 Groove 130 Moving valve body 140 Check valve 141 Circular wall 142 Arm 143 Valve body 150 Lid 151 Hinge 152 Upper wall 153 Lid peripheral wall 154 Seal 200 Double container K1 Inner space K2 Outer space S1, S2 Containment space T Ventilation channel

Claims (5)

An outer layer having a mouth, a body and a bottom and forming an outer shell of a container, an inner layer contained inside the outer layer and forming a storage space for contents, and an outer layer formed on the outer layer. A container body having an air introduction hole to be provided, and capable of introducing air from the air introduction hole into an internal space formed between the outer layer body and the inner layer body as the inner layer body is reduced in volume.
It is equipped with a cap body that is attached to the mouth.
The cap body and the mouth portion, possess at least a pair of rotating engaging portions for fixing both the rotation engagement, and at least a pair of detent portions formed above the該回Dogakarigo portion ,
The at least pair of rotary engaging portions has a male screw portion provided on the mouth portion and a female screw portion provided on the cap body and capable of screw engagement with the male screw portion, and the female screw portion has a circumferential. It is formed intermittently in the direction and
The detent portion on the cap body side of at least the pair of detent portions is intermittently formed in the circumferential direction, and is characterized in that the detent portion is formed at a position in the circumferential direction in which the female screw portion is provided. Double container to do. The double container according to claim 1, wherein the at least pair of detent portions is a ratchet mechanism having at least one ratchet gear. The double container according to claim 1, wherein at least the pair of detent portions are at least a pair of undercut engaging portions. The double container according to any one of claims 1 to 3, wherein the air introduction hole is a through hole formed below at least the pair of rotary engaging portions. The one for blocking the communication between the inner body and the outside, is opened by the pressure rise of the inner layer the body has a check valve for supplying the contents to the outside, according to any one of claims 1 to 4 two Heavy container.

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