JP6054820B2 - Double container - Google Patents

Description

  The present invention relates to a double container having a double structure in which an inner layer body for containing contents is accommodated inside an outer layer body, and only the inner layer body is contracted with the content being poured out.

  Conventionally, for example, a container for storing contents such as cosmetics such as shampoo, rinse, liquid soap, and lotion, or food seasonings such as miso, cooking liquor, soy sauce, sauce, etc. 2. Description of the Related Art A double container (a delamination container) is known that has a double structure housed inside the body and that allows the contents to be poured out from a spout of a spout cap attached to the mouth of the outer layer body. . The double container can introduce the outside air between the inner layer body and the outer layer body through the opening provided in the outer layer body as the contents are poured out, so that the inner layer body can be contracted. By preventing the outside air from flowing into the body, the contact between the contents and the outside air can be avoided as much as possible.

  In such a double container, a check valve is provided in the path between the outside air introduction hole provided in the pouring cap and the opening of the outer layer body, and the inner layer is added to the inner layer with the check valve. The outside air introduced between the body and the outer layer body is held between the inner layer body and the outer layer body, and the contents can be poured out by squeezing the outer layer body.

  For example, in Patent Document 1, a ventilation region isolated from the outside is defined inside the extraction cap, and an opening provided in the mouth portion of the outer layer body and an outside air introduction hole provided in the extraction cap through the ventilation region. And a double container in which a check valve for opening and closing the outside air introduction hole is disposed in the dispensing cap.

JP 2011-31921 A

  However, in the double container shown in Patent Document 1, a check valve is used to keep the outside air introduced between the inner layer body and the outer layer body between the inner layer body and the outer layer body. There is a problem that the number of parts increases by the amount of the valve, and the cost of the double container increases.

  An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide outside air introduced between the inner layer body and the outer layer body between the inner layer body and the outer layer body. An object of the present invention is to provide a low-cost double container that does not require a check valve for holding.

  The double container of the present invention is provided with an inner layer body provided with an upper opening connected to the contents accommodating portion and an opening for accommodating the inner layer body and introducing outside air between the inner layer body. A double container having an outer layer body and a pouring cap provided at the mouth of the outer layer body with an outer layer body, and having a pouring path communicating the housing portion and the pouring port A lower end portion of a cylindrical wall that covers an outer periphery of the mouth portion of the pouring cap is an outer periphery of the outer layer body, the inner plug mounted on the upper opening, and a check valve that opens and closes the pouring passage A ventilation region is defined between the cylindrical wall and the mouth portion by fitting to a surface, and the ventilation region communicates with the outside of the dispensing cap by a throttle passage positioned below the upper opening. It is characterized by that.

  In the above configuration, it is preferable that the throttle passage is formed in a groove shape on the inner peripheral surface of the lower end portion of the cylindrical wall that is fitted to the outer peripheral surface of the outer layer body.

  In the above configuration, it is preferable to provide the throttle passage in the cylindrical wall.

  According to the present invention, the ventilation region defined between the cylindrical wall of the extraction cap and the mouth portion of the outer layer body is communicated to the outside of the extraction cap by the throttle passage positioned below the upper opening. In addition, it is possible to introduce the outside air introduced into the ventilation region through the throttle passage as the contents are poured out between the inner layer body and the outer layer body through the opening, and in order to pour the contents, the outer layer When squeezing the body, the air between the inner layer body and the outer layer body can be held at a desired pressure and the contents can be poured out by squeezing the outer layer body, so that a check valve is not required, The cost of this double container can be reduced.

It is sectional drawing of the principal part of the double container which is one Embodiment of this invention. It is a modification of the double container shown in FIG. 1, Comprising: It is sectional drawing which shows the case where a throttle path is provided in the cylindrical wall of the extraction cap.

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

  A double container 1 according to an embodiment of the present invention shown in FIG. 1 stores liquid contents such as food seasonings, and has a container body 2 and a dispensing cap 3. Yes. The container body 2 has a double structure of a delamination type having an inner layer body 4 and an outer layer body 5, and the dispensing cap 3 is attached to a mouth portion 5 a provided in the outer layer body 5. The container body 2 is not limited to the laminate peeling type, and may be a combination type in which the inner layer body (inner container) 4 and the outer layer body (outer container) 5 are individually molded and then combined.

  The inner layer body 4 constituting the container main body 2 is formed into a flexible bag body with, for example, a thin synthetic resin, and the inside thereof is a housing portion 4a for housing contents. The upper end portion of the inner layer body 4 is an upper opening 4b connected to the accommodating portion 4a, and the contents accommodated in the accommodating portion 4a can be poured out from the upper opening 4b.

  The outer layer body 5 forms an outer shell of the container body 2 and has the above-described mouth portion 5a and a body portion 5b integrally connected to the mouth portion 5a. The outer layer body 5 accommodates the inner layer body 4 in a peelable manner inside, and the upper opening 4b of the inner layer body 4 is fixed to the opening end of the mouth portion 5a.

  The mouth portion 5a of the outer layer body 5 is formed in a cylindrical shape, and a male screw portion 5c is integrally provided on the outer peripheral surface thereof. In addition, the mouth portion 5a of the outer layer body 5 is provided with a pair of apertures 6 penetrating the mouth portion 5a in the radial direction. These openings 6 communicate with each other between the inner layer body 4 and the outer layer body 5, and external air can be introduced between the inner layer body 4 and the outer layer body 5 through the opening 6. Note that the number of apertures 6 is not limited to two, and at least one aperture may be provided.

  The dispensing cap 3 is formed in a cylindrical shape with a cylindrical wall 7 and a top wall 8 connected to the upper end of the cylindrical wall 7, and an internal thread 7 a is integrally formed on the inner peripheral surface of the cylindrical wall 7. Is provided. The dispensing cap 3 is attached to the mouth portion 5a of the outer layer body 5 by screwing the female screw portion 7a to the male screw portion 5c provided in the mouth portion 5a of the outer layer body 5. The pouring cap 3 attached to the mouth part 5 a covers the outer periphery of the mouth part 5 a with the cylindrical wall 7 and covers the upper part of the mouth part 5 a with the top wall 8. The top wall 8 of the dispensing cap 3 is provided with a cylindrical stepped portion 8a that protrudes upward. The stepped portion 8a is displaced from the axial center of the top wall 8 and is integrally provided with a spout (nozzle) 9. Is provided. The spout 9 protrudes in a trumpet shape from the upper surface of the stepped portion 8 a of the top wall 8, protrudes in a cylindrical shape from the lower surface of the stepped portion 8 a, and penetrates the top wall 8. The spout 9 communicates with the upper opening 4b of the inner layer body 4 so that the contents accommodated in the inner layer body 4 can be poured out. The upper side is the side on which the upper opening 4 b is provided with respect to the housing part 4 a of the inner layer body 4.

  The dispensing cap 3 is provided with an overcap 10 that can be opened and closed via a hinge 11. The overcap 10 is formed in a cylindrical shape having substantially the same diameter as the pouring cap 3, and can be engaged with the pouring cap 3 by means such as undercut to keep the pouring cap 3 closed. it can. A cylindrical plug body 10 a that is inserted into the spout 9 when the overcap 10 is closed and closes the spout 9 is integrally formed on the inner surface of the overcap 10.

  An inner plug 12 is attached to the upper opening 4 b of the inner layer body 4. The inner plug 12 is made of, for example, a synthetic resin, and includes a substantially disc-shaped main body portion 13 and a cylindrical spacer portion 14 that protrudes upward from the outer peripheral edge of the main body portion 13. The spacer portion 14 has an outer diameter that is substantially the same as the inner diameter of the cylindrical wall 7 of the dispensing cap 3, and the inner plug 12 fits the outer peripheral surface of the spacer portion 14 to the inner peripheral surface of the cylindrical wall 7. At the same time, the upper end of the spacer portion 14 is in contact with the top wall 8 from the axial direction and is arranged inside the pouring cap 3. By providing the spacer portion 14, a space is provided between the inner plug 12 attached to the extraction cap 3 and the top wall 8 of the extraction cap 3. A cylindrical fitting tube portion 15 is coaxially and integrally provided on the lower surface of the main body portion 13 of the inner plug 12, that is, the surface facing the accommodating portion 4 a side of the inner layer body 4. 4 is fitted inside the upper opening 4b. Further, the main body portion 13 of the inner plug 12 is provided with a pouring passage 16 formed as a through-hole penetrating the front and back surfaces thereof. And communicated with each other.

  A valve unit 21 formed of, for example, synthetic resin, rubber, elastomer, silicon, or the like is mounted in the space between the dispensing cap 3 and the inner plug 12. The valve unit 21 has a cylindrical partition wall 21a. One end of the partition wall 21 a in the axial direction is fitted into an annular groove 13 a formed on the upper surface of the main body 13 of the inner plug 12, and the other end in the axial direction is formed on the lower surface of the top wall 8 of the dispensing cap 3. It is fitted into an annular groove 8 b formed coaxially with the annular groove 13 a and is fixed between the dispensing cap 3 and the inner plug 12. The inner space of the pouring cap 3 partitioned by the partition wall 21a is a pouring region 22 connecting the pouring channel 16 and the pouring port 9, and the content poured out from the pouring channel 16 is the pouring region. 22 flows through the spout 9.

  A check valve 21b is integrally provided on the inner side in the radial direction of the partition wall 21a in order to prevent outside air from being introduced from the outlet channel 16 into the accommodating portion 4a of the inner layer body 4. The check valve 21b is formed in a disk shape coaxial with the partition wall 21a, and is connected to the inner peripheral surface of the partition wall 21a by a plurality of (for example, three) connecting pieces 21c that are elastically deformable at the outer peripheral edge thereof. By the elastic deformation of the connecting piece 21c, the connecting piece 21c is movable in the axial direction (vertical direction) with respect to the partition wall 21a. The check valve 21b is disposed at the opening end of the pouring channel 16 facing the pouring port 9 to close the pouring channel 16, and the contents accommodated in the inner layer body 4 by, for example, squeezing the outer layer body 5 When the pressure is applied to the outlet, it is opened and the contents are circulated from the outlet passage 16 toward the outlet 9. On the other hand, when the pressure applied to the contents is released after the contents are poured out, the check valve 21b returns to the position where the pouring path 16 is closed by the elastic force of the connecting piece 21c. Inflow of outside air from the outlet 16 to the accommodating portion 4a of the inner layer body 4 is prevented.

  A cylindrical tubular portion 23 is integrally provided in the main body portion 13 of the inner plug 12 adjacent to the dispensing passage 16. The cylindrical portion 23 opens to the housing portion 4a of the inner layer body 4 and the pouring region 22 of the pouring cap 3, and a ball 24 that is formed into a spherical shape by, for example, a steel material or a resin material is contained therein. Has been placed. The diameter of the ball 24 is equal to the inner diameter of the cylindrical portion 23 and is movable in the axial direction inside the cylindrical portion 23. A reduced diameter portion 23 a is integrally provided at the lower end of the cylindrical portion 23, and a part of the check valve 21 b is disposed at the upper end of the cylindrical portion 23, whereby the ball 24 is in the cylindrical portion 23. Is held inside. When the double container 1 is in an upright posture with the pouring cap 3 on the upper side, the ball 24 is located at the end of the cylindrical portion 23 on the side of the accommodating portion 4a by its own weight, and the double container 1 is in the upright posture. On the other hand, when the contents are tilted by 90 degrees or more and are poured out, the contents move to the end of the cylindrical portion 23 on the side of the pouring region 22 as indicated by a broken line in the figure. After the contents are poured out in this state, when the double container 1 is returned to the original standing posture, the direction in which the ball 24 moves away from the pouring region 22 with the inside of the cylindrical portion 23 facing the accommodating portion 4a side. In accordance with the movement, the contents accumulated in the spout 9 and the pour region 22 are drawn into the cylindrical portion 23 (suck back). Thereby, the dripping from the front-end | tip of the spout 9 can be prevented effectively.

  The space between the cylindrical wall 7 of the dispensing cap 3 and the mouth portion 5a of the outer layer body 5 is a ventilation region 31, and the opening 6 provided in the mouth portion 5a of the outer layer body 5 is in the ventilation region 31. It is open. The male screw portion 5c provided in the mouth portion 5a is provided with a slit-like groove portion 32 extending along the axial direction, and this groove portion 32 also constitutes a part of the ventilation region 31.

  A cylindrical fitting portion 5d having a larger diameter than the mouth portion 5a is integrally provided between the mouth portion 5a and the body portion 5b of the outer layer body 5, and the pouring cap 3 is provided on the outer peripheral surface of the fitting portion 5d. The lower end portion of the cylindrical wall 7 is fitted. Thereby, the lower end of the ventilation region 31 is sealed and partitioned from the outside of the pouring cap 3. Note that the upper side of the ventilation region 31 is such that the lower surface of the inner plug 12 comes into contact with the open end (upper end) of the mouth portion 5 a and the upper end of the spacer portion 14 comes into contact with the inner surface of the top wall 8 of the dispensing cap 3. It is sealed.

  In order to introduce outside air into the opening 6 provided in the mouth portion 5a of the outer layer body 5, the pouring cap 3 is provided below the upper opening 4b of the inner layer body 4 (with respect to the upper opening 4b, the housing portion 4a A throttling passage 33 is provided at the side. As shown in AA cross section in FIG. 1, the throttle passage 33 is formed in the axial direction of the cylindrical wall 7 on the inner peripheral surface of the lower end portion of the cylindrical wall 7 fitted to the outer peripheral surface of the fitting portion 5 d of the outer layer body 5. Is formed in a groove shape having a rectangular cross section extending along the line. The throttle passage 33 communicates with the ventilation region 31 at the upper end side and opens to the outside of the pouring cap 3 at the lower end side of the cylindrical wall 7 to communicate the ventilation region 31 with the outside. The throttle passage 33 functions as an orifice, and causes a predetermined resistance to the outside air (air) flowing between the outside of the dispensing cap 3 and the ventilation region 31 through the throttle passage 33. be able to.

  With such a configuration, when the volume of the inner layer body 4 is reduced as the contents are poured out, outside air is passed between the inner layer body 4 and the outer layer body 5 from the throttle passage 33 through the ventilation region 31. It can introduce | transduce and can reduce only the inner-layer body 4. FIG.

  On the other hand, when the outer layer body 5 is squeezed to pour out the contents, the pressure of the air accumulated between the inner layer body 4 and the outer layer body 5 is increased and the throttle passage 33 is opened from the opening 6. Through the pouring cap 3. However, since the throttle passage 33 functions as an orifice, even if the outer layer body 5 is squeezed and the pressure of air between the inner layer body 4 and the outer layer body 5 is increased, the air passes through the throttle passage 33. When a large resistance is applied, it cannot easily flow out. That is, the pressure of the air between the inner layer body 4 and the outer layer body 5 raised by the squeeze of the outer layer body 5 is gradually reduced without suddenly reducing the pressure. Therefore, when the outer layer body 5 is squeezed to pour out the contents, the air pressure between the inner layer body 4 and the outer layer body 5 is allowed to pour out the contents from the inner layer body 4 for a while. It can be kept in a high enough state. Thereby, when the outer layer body 5 is squeezed, the inner layer body 4 is crushed through the air whose pressure between the inner layer body 4 and the outer layer body 5 is increased, and the contents accommodated in the accommodating portion 4a Can be poured out from the spout 9 of the spout cap 3.

  In order to produce the above-mentioned function, the cross-sectional area of the throttle passage 33 formed in the groove shape is such that the content can be dispensed so that the content can be dispensed when the outer layer body 5 is squeezed. It is set based on the rigidity of the outer layer body 5 and the restoring force after squeezing.

  In this manner, the extraction cap 3 is provided with the throttle passage 33, and outside air is introduced and discharged between the inner layer body 4 and the outer layer body 5 and the outside of the extraction cap 3 through the throttle passage 33. Thus, the outside air can be introduced between the opening 6, that is, the inner layer body 4 and the outer layer body 5 from the throttle passage 33 as the contents are poured out, and the outer layer is poured out for the contents to be poured out. When the body 5 is squeezed, the air between the inner layer body 4 and the outer layer body 5 is kept in a high pressure state, and the contents contained in the inner layer body 4 are discharged from the spout 9 of the spout cap 3. Can be poured out to the outside. Since the throttle passage 33 is integrally provided in a groove shape on the cylindrical wall 7 of the dispensing cap 3, there is no need to provide a separate part such as a check valve. The number of parts can be reduced, and the cost can be reduced.

  Further, since the throttle passage 33 is provided below the upper opening 4b of the inner layer body 4, in providing the throttle passage 33, the configuration of the portion other than the groove of the inner plug 12 and the dispensing cap 3 is simplified, The cost of the double container 1 can be further reduced.

  FIG. 2 is a cross-sectional view showing a modification of the double container shown in FIG. 1 and showing a case where a throttle passage is provided in the cylindrical wall of the extraction cap. In FIG. 2, members corresponding to the members described above are denoted by the same reference numerals.

  In the modification shown in FIG. 2, the throttle passage 33 is provided in the cylindrical wall 7 of the dispensing cap 3 as a through hole that penetrates the cylindrical wall 7 in the radial direction. Also in this case, the throttle passage 33 is provided below the upper opening 4 b of the inner layer body 4 and below the opening 6.

  The throttle passage 33 in this modified example has a large-diameter enlarged hole 33a having a tapered inner surface and a small-diameter enlarged hole 33b having a tapered inner surface having a smaller diameter than the large-diameter enlarged hole 33a. The large-diameter enlarged hole 33 a opens to the outside of the pouring cap 3, and the small-diameter enlarged hole 33 b opens to the ventilation region 31. In this case, the small-diameter enlarged hole 33 b of the throttle passage 33 functions as an orifice, and a predetermined resistance is generated between the outside of the extraction cap 3 and the outside air (air) flowing through the throttle passage 33. Even with the configuration of such a modification, the same effect as that shown in FIG. 1 can be produced.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, in the embodiment shown in FIG. 1, the throttle passage 33 is provided in a groove shape on the inner peripheral surface of the lower end portion of the cylindrical wall 7 of the extraction cap 3, and in the embodiment shown in FIG. 2, the throttle passage 33 is poured. Although the cylindrical wall 7 of the output cap 3 is provided as a through hole, the present invention is not limited to this, and it is provided below the upper opening 4b of the inner layer body 4 so that the ventilation region 31 can communicate with the outside. If so, the throttle passage 33 can have other configurations and arrangements.

  In the present invention, the throttle passage 33 is preferably provided below the opening 6 provided in the mouth portion 5a of the outer layer body 5. By providing the throttle passage 33 below the opening 6, even if foreign matter such as contents dripping from the spout 9 is mistakenly introduced from the throttle passage 33, the foreign matter is opened through the ventilation region 31. 6 can be prevented from entering between the inner layer body 4 and the outer layer body 5.

  Moreover, in the said embodiment, although the non-return valve 21b which opens and closes the extraction channel | path 16 is integrally formed with the partition wall 21a, as long as it can open and close the extraction channel | path 16, it is not limited to this. It can also be configured. In addition, the check valve 21b is not limited to a flat plate shape, and may have various shapes as long as the check passage 21b has a structure capable of opening and closing the pouring path 16.

DESCRIPTION OF SYMBOLS 1 Double container 2 Container main body 3 Pouring cap 4 Inner layer body 4a Accommodating part 4b Upper opening 5 Outer layer body 5a Mouth part 5b Body part 5c Male thread part 5d Fitting part 6 Opening 7 Cylindrical wall 7a Female thread part 8 Top wall 8a Step Portion 8b Annular groove 9 Outlet 10 Overcap 10a Plug body 11 Hinge 12 Middle plug 13 Body portion 13a Annular groove 14 Spacer portion 15 Fitting cylinder portion 16 Outlet passage 21 Valve unit 21a Partition wall 21b Check valve 21c Connecting piece 22 Note Out area 23 Tubular portion 23a Reduced diameter portion 24 Ball 31 Ventilation area 32 Groove portion 33 Restricted passage 33a Large diameter enlarged hole 33b Small diameter enlarged hole

Claims (3)

An inner layer body provided with an upper opening connected to the contents accommodating portion, an outer layer body that accommodates the inner layer body and has an opening in the mouth for introducing outside air between the inner layer body, and an injection of the contents A double container having an outlet and a pouring cap attached to the mouth of the outer layer body,
A pouring path for communicating the accommodating portion and the pouring port, and an inner plug attached to the upper opening;
A check valve that opens and closes the extraction path,
A lower end portion of a cylindrical wall covering the outer periphery of the mouth portion of the dispensing cap is fitted to the outer peripheral surface of the outer layer body, and a ventilation region is defined between the cylindrical wall and the mouth portion,
The double container, wherein the ventilation region communicates with the outside of the pouring cap by a throttle passage located below the upper opening.   The double container according to claim 1, wherein the throttle passage is formed in a groove shape on an inner peripheral surface of a lower end portion of the cylindrical wall that is fitted to an outer peripheral surface of the outer layer body.   The double container according to claim 1, wherein the throttle passage is provided in the cylindrical wall.

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