JP2017214094A - Double container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double container that can achieve resource saving and cost reduction by reducing the number of members involved in the vicinity of a check valve.SOLUTION: The double container comprises: an outer layer body 1 that comprises a vent hole 1c at a mouth part peripheral wall 1a; an inner layer body 2 that comprises a filling space S and is decreased in volume and deformed by air to be introduced into a space between the outer layer body 1 and the inner layer body through the vent hole 1c; a pour-out cap 4 that comprises a top wall 4c positioned above the mouth part peripheral wall 1a and has an introduction port 4f leading to the filling space S and an outside air introduction hole 4k leading to the vent hole 1c; and a check valve 3 that closes the outside air introduction hole 4k in a state of pressing the outer layer body 1, while releases the outside air introduction hole 4k in a state of restoring the outer layer body 1. The check valve 3 is a thin-walled piece which is connected integrally to at least either one of the outer layer body 1 and the inner layer body 2.SELECTED DRAWING: Figure 1

Description

  The present invention includes a flexible outer layer body and a volume-deformable inner layer body housed inside the outer layer body, and the contents contained in the inner layer body are poured out by pressing the outer layer body. It relates to heavy containers.

  As a container for storing cosmetics such as lotion, shampoo, rinse, liquid soap, food seasoning, etc., a flexible outer layer body and a volume-reducible inner layer body that can be stored inside the outer layer body And a double container (also referred to as a delamination container) is known that discharges the contents contained in the inner layer body by pressing the outer layer body. The outer layer body of such a double container is provided with vent holes (through holes, slits, etc.) penetrating the front and back, and when the pressed outer layer body is restored, the outer layer body and the inner layer body are mutually connected through the vent holes. Air can be taken in between. Thereby, it is possible to restore only the outer layer body while the inner layer body is deformed and deformed.

  As such a double container, for example, Patent Document 1 discloses an outer layer body having a vent on the peripheral wall of the mouth, a pouring cap attached to the outer layer body and having an outside air introduction hole connected to the vent, and a pouring cap. Provided with a check valve that normally closes the outside air introduction hole and releases the outside air introduction hole when the outer layer body is restored and negative pressure is generated between the outer layer body and the inner layer body. It is shown. Furthermore, this double container is provided with an inner stopper that covers the upper opening of the outer layer body inside the pouring cap, and the check valve is held between the pouring cap and the inner stopper.

JP 2013-151316 A

  In recent years, efforts have been made to reduce the number of parts as much as possible from the viewpoint of environmental considerations and cost reduction, and reduction of the number of parts is also required in such a double container.

  For this reason, in the present invention, focusing on the check valve used for the double container, it is an object to reduce the number of parts of the members related to the periphery of the check valve, thereby saving resources and reducing costs. The purpose is to propose a double container that can be used.

The present invention comprises a flexible outer layer body provided with a vent on the peripheral wall of the mouth,
An inner layer body that has a filling space capable of containing contents and that undergoes volume reduction deformation by air introduced between the vent and the outer layer body;
A pouring cap having a ceiling wall located above the peripheral wall of the mouth and having an introduction port leading to the filling space and an outside air introduction hole leading to the vent;
A double container having a check valve that closes the outside air introduction hole in a state in which the outer layer body is pressed and releases the outside air introduction hole in a state in which the outer layer body is restored;
The check valve is a thin piece integrally connected to at least one of the outer layer body and the inner layer body.

  The thin piece is preferably configured in a state where the outer layer body and the inner layer body are laminated.

  The thin piece has a linear shape, a curved shape, or an intermediate portion provided between a connecting portion integrally connected to at least one of the outer layer body and the inner layer body and a tip portion contacting the back surface of the top wall. A bent shape is preferred.

  It is preferable that the said front-end | tip part extends along the back surface of the said top wall.

  The tip portion is preferably thicker than the intermediate portion.

  The check valve of the present invention is not sandwiched and held between the pouring cap and the inner plug as in the prior art, but is a thin piece integrally connected to at least one of the outer layer body and the inner layer body. That is, since the inner plug used in the conventional double container is not required, the number of parts can be reduced.

It is sectional drawing and partial expanded sectional view which show 1st embodiment of the double container according to this invention. It is a partial expanded sectional view which shows 2nd embodiment of the double container according to this invention. It is a partial expanded sectional view which shows 3rd embodiment of the double container according to this invention. It is a partial expanded sectional view which shows 4th embodiment of the double container according to this invention.

  Hereinafter, the present invention will be described more specifically with reference to the drawings. In the present specification, claims, and abstract, “upper” and “lower” refer to directions in a posture (upright posture) in which a double container is placed on a horizontal plane.

  In FIG. 1, the code | symbol A has shown 1st embodiment of the double container according to this invention. The double container A includes an outer layer body 1, an inner layer body 2, a check valve (air check valve) 3, a dispensing cap 4, a content check valve 5, and a lid body 6.

  The outer layer body 1 is formed of a synthetic resin, and is connected to a cylindrical mouth peripheral wall 1a with a bottomed cylindrical body (not shown) having flexibility, and is formed into a bottle shape as a whole. It is. A recess 1b is provided on the outer peripheral surface of the mouth peripheral wall 1a, and a through-hole (vent hole) 1c penetrating the front and back of the mouth peripheral wall 1a is provided at a portion where the recess 1b is provided. On the outer peripheral surface of the mouth peripheral wall 1a, a protrusion 1d is provided below the vent hole 1c so as to protrude outward in the radial direction.

  The inner layer body 2 is made of a thin synthetic resin and can be deformed by volume reduction. In addition, a filling space S for accommodating the contents is provided inside the inner layer body 2.

  The air check valve 3 is a thin piece (burr-like) integrally connected to at least one of the outer layer body 1 and the inner layer body 2. As shown in the partially enlarged view of FIG. 1, the air check valve 3 of the present embodiment is configured in a state in which an outer layer body 1 and an inner layer body 2 are laminated. That is, the air check valve 3 is integrally connected to both the outer layer body 1 and the inner layer body 2. The air check valve 3 includes a connecting portion 3a that is integrally connected to both the outer layer body 1 and the inner layer body 2, an elastically deformable intermediate portion 3b that is located radially outside the connecting portion 3a, and an intermediate portion 3b. It is comprised by the front-end | tip part 3c located in the radial direction outer side. The intermediate portion 3b of the present embodiment has a linear shape that inclines so as to go upward as it goes outward in the radial direction. Moreover, the intermediate part 3b and the front-end | tip part 3c are comprised by substantially the same thickness.

  The outer layer body 1 and the inner layer body 2 including the air check valve 3 can be formed by, for example, blow molding. Specifically, after selecting a synthetic resin material forming the outer layer body 1 and a synthetic resin material forming the inner layer body 2 having low compatibility with each other, a cylindrical parison obtained by stacking them is used. prepare. In addition, as a split mold for performing blow molding, a minute space for forming a thin air check valve 3 is provided in a portion forming the upper outer end of the peripheral wall 1a. The parison is eaten out outside the minute space. Thereby, the check valve 3 for air can be formed in the upper outer end of the opening part surrounding wall 1a. In addition, such a parison usually has a synthetic resin material that forms the outer layer body 1 and a synthetic resin material that forms the inner layer body 2 continuously extruded and uniformly laminated in the length direction. For this reason, the air check valve 3 is in a state where the outer layer body 1 and the inner layer body 2 are stacked, but by pressing only one of them at a predetermined timing, the stacked portion becomes intermittent in the length direction. The formed parison may be used. In this case, the air check valve 3 can be configured by either the outer layer body 1 or the inner layer body 2. In addition, by preparing a test tubular preform in which a synthetic resin material forming the outer layer body 1 and a synthetic resin material forming the inner layer body 2 are laminated, biaxial stretch blow molding is performed on the preform. It is also possible to form.

  The dispensing cap 4 includes a cylindrical outer peripheral wall 4a surrounding the mouth peripheral wall 1a. On the inner surface of the outer peripheral wall 4a, a claw portion 4b that engages with the protrusion 1d and holds the pouring cap 4 is provided. Note that the outer layer body 1 and the extraction cap 4 may be screw-coupled by providing a male screw or a female screw instead of the protrusion 1d and the claw portion 4b.

  A plate-like top wall 4c is provided at the upper end of the outer peripheral wall 4a. The top wall 4c has a pouring cylinder 4d that is erected upward and whose tip is curved radially outward to form a lip, and a cylindrical shape that extends downward from the inner surface of the pouring cylinder 4d. The cylindrical portion 4e and an introduction port 4f that opens at the lower end of the cylindrical portion 4e and communicates with the filling space S are provided. In the lower part of the cylindrical part 4e, a reduced diameter part 4g having a diameter that decreases toward the bottom is provided. Further, on the inner surface of the cylindrical portion 4e, a rib 4h whose upper portion is curved inward in the radial direction is provided.

  Further, on the radially outer side of the cylindrical portion 4e, a seal wall 4j that sandwiches the inner layer body 2 with the outer layer body 1 and prevents leakage of contents from the filling space S is provided.

  Further, on the outside of the seal wall 4j, a through hole (outside air introduction hole) 4k penetrating the top wall 4c in the vertical direction is provided above the air check valve 3. And the front-end | tip part 3c of the air check valve 3 is contact | abutting to the back surface of the top wall 4c in the radial direction outer side of the external air introduction hole 4k, and the external air introduction hole 4k is closed.

  The content check valve 5 has a spherical shape and is movably provided in the cylindrical portion 4e. The check valve 5 for contents is in contact with the inner peripheral surface of the reduced diameter portion 4g over the entire circumference in a state where the double container A is in an upright posture as shown in FIG. This prevents contact between the contents in the filling space S and the outside air. In addition, the check valve 5 for contents shown with a dashed-two dotted line has shown the state which moved upwards in the state which closed the cover body 6. FIG.

  The lid 6 includes a plate-like top wall 6a positioned above the top wall 4c, and an outer wall 6b extending downward from the outer edge of the top wall 6a and having a shape continuous with the outer peripheral wall 4a. Here, the outer peripheral wall 4a and the outer wall 6b are integrally connected via a hinge h. Further, the outer wall 6b is provided with a finger hooking portion 6c which is formed in a shape extending in the horizontal direction on the side opposite to the side where the hinge h is provided, and serves as a portion where a finger is put on when opening and closing. The hinge h may be omitted, and the dispensing cap 4 and the lid body 6 may be separated and the lid body 6 may be held by screw connection.

  On the back surface of the top wall 6a, a cylindrical seal cylinder 6d that comes into contact with the inner peripheral surface of the cylindrical portion 4e when the lid body 6 is closed, and a lid body 6 that is positioned radially inside the seal cylinder 6d. A rod-like portion 6e that prevents the contents check valve 5 from coming out of the tubular portion 4e in the closed state is provided.

  When the contents are poured out from the double container A having such a structure, after opening the lid body 6, the outer layer body 1 is changed from an upright position to a tilted position, and the outer layer body 1 is not shown. Press the torso. As a result, the filling space S is pressurized via the air existing between the outer layer body 1 and the inner layer body 2, and as a result, the contents of the filling space S enter the cylindrical portion 4e through the inlet 4f, The contents are poured out from the outlet tube 4d. In addition, since the front-end | tip part 3c of the air non-return valve 3 contact | abuts the back surface of the top wall 4c in the extraction | pouring cap 4, and the external air introduction hole 4k is closed, between the outer-layer body 1 and the inner-layer body 2 Does not leak out from the outside air introduction hole 4k.

  After the content has been poured out, when the outer layer body 1 is released from being pressed, the outer layer body 1 tries to return to its original shape by its own restoring force. Is in a negative pressure state. Then, the intermediate portion 3b of the air check valve 3 is elastically deformed by the outside air pressure, and the tip portion 3c is separated from the back surface of the top wall 4c, so that the outer layer body 1 and the inner layer body 2 are separated from each other through the outside air introduction hole 4k. Air is taken in between them. Thus, only the outer layer body 1 can be restored while the inner layer body 2 is deformed and deformed.

  Next, a second embodiment of the double container according to the present invention will be described with reference to FIG. The double container B shown in FIG. 2 is provided with an air check valve 13 in place of the air check valve 3 with respect to the double container A described above.

  The air check valve 13 is configured in a state in which the outer layer body 1 and the inner layer body 2 are laminated, similarly to the air check valve 3 described above. The air check valve 13 has an intermediate portion 13b positioned between a connecting portion 13a that is integrally connected to both the outer layer body 1 and the inner layer body 2 and a tip portion 13c that is in contact with the back surface of the top wall 4c. As shown in FIG. 4, the curved shape is convex downward. That is, the air check valve 13 can have a longer overall length than the air check valve 3, so that the tip 13 c contacts the back surface of the top wall 4 c with lower elastic force even with the same thickness. Can be touched.

  Moreover, the double container according to the present invention may employ a double container C as shown in FIG. The double container C is obtained by replacing the air check valve 3 described above with an air check valve 23.

The air check valve 23 is configured in a state in which the outer layer body 1 and the inner layer body 2 are laminated in the same manner as the air check valve 3 described above. Further, the intermediate portion 23b positioned between the connecting portion 23a that is integrally connected to both the outer layer body 1 and the inner layer body 2 and the tip portion 23c that contacts the back surface of the top wall 4c has a radial direction as shown in FIG. It is bent so that the outer lower part protrudes. The overall length of the air check valve 23 can be made longer than that of the air check valve 3. Moreover, since the front end portion 23c extends radially outward along the back surface of the top wall 4c, the front end portion 23c can be brought into surface contact with the back surface of the top wall 4c. Thereby, the outside air introduction hole 4k can be closed more stably than the air check valve 3 whose tip is in line contact with the back surface of the top wall 4c.

  The double container according to the present invention may be a double container D as shown in FIG. The double container D is obtained by replacing the air check valve 3 described above with an air check valve 33.

  The air check valve 33 is also configured in a state in which the outer layer body 1 and the inner layer body 2 are laminated in the same manner as the air check valve 3 described above. The intermediate portion 33b has a linear shape extending in the horizontal direction from the connecting portion 33a, and a distal end portion 33c extending upward is connected to the outer edge thereof. Here, the tip portion 33c is formed thicker than the intermediate portion 33b. Thus, by making the tip end portion 33c thick, it is possible to more reliably prevent deformation when the circulation or the pouring cap 4 is attached.

  The double container according to the present invention is not limited to the present embodiment, and various modifications are possible within the scope according to the claims. For example, in a check valve for air, the specification that the tip part is thicker than the intermediate part is not only provided with an intermediate part that is bent as shown in FIG. 3, but also curved as shown in FIG. You may apply to what is provided with the intermediate part of a shape. In addition, the above-described dispensing cap is provided with a cylindrical part and has a lower end as an introduction port and a spherical check valve for the contents inside the cylindrical part. For example, the cylindrical part is omitted. A through hole provided in the ceiling wall may be used as an introduction port, and the content check valve may be configured as a three-point valve that can be elastically deformed.

1: outer layer body 1a: mouth peripheral wall 1b: recess 1c: vent 1d: protrusion 2: inner layer body 3: check valve (air check valve)
3a: Connection part 3b: Intermediate part 3c: Tip part 4: Discharge cap 4a: Outer peripheral wall 4b: Claw part 4c: Top wall 4d: Discharge cylinder 4e: Cylindrical part 4f: Inlet 4g: Reduced diameter part 4h: Rib 4j: Seal wall 4k: Outside air introduction hole 5: Check valve 6 for contents 6: Lid 6a: Top wall 6b: Outer wall 6c: Finger hook part 6d: Seal tube 6e: Rod-like parts 13, 23, 33: Reverse for air Stop valves 13a, 23a, 33a: connecting portions 13b, 23b, 33b: intermediate portions 13c, 23c, 33c: tip portions A, B, C, D: double container S: filling space h: hinge

Claims (5)

An outer layer body having a ventilation hole in the peripheral wall of the mouth and having flexibility;
An inner layer body that has a filling space capable of containing contents and that undergoes volume reduction deformation by air introduced between the vent and the outer layer body;
A pouring cap having a ceiling wall located above the peripheral wall of the mouth and having an introduction port leading to the filling space and an outside air introduction hole leading to the vent;
A double container having a check valve that closes the outside air introduction hole in a state in which the outer layer body is pressed and releases the outside air introduction hole in a state in which the outer layer body is restored;
The check valve is a double container that is a thin piece integrally connected to at least one of the outer layer body and the inner layer body.   The double container according to claim 1, wherein the thin piece is configured in a state where the outer layer body and the inner layer body are laminated.   The thin piece has a linear shape, a curved shape, or an intermediate portion provided between a connecting portion integrally connected to at least one of the outer layer body and the inner layer body and a tip portion contacting the back surface of the top wall. The double container according to claim 1 or 2, which has a bent shape.   The double container according to claim 3, wherein the tip portion extends along a back surface of the top wall.   The double container according to claim 3 or 4, wherein the tip portion is thicker than the intermediate portion.

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