JP6125873B2 - Double container - Google Patents

Description

  The present invention includes an outer layer body that forms an outer shell of a container and an inner layer body that can be volume-reduced and deformed that is housed inside the outer layer body, and reduces only the inner layer body as the contents are poured out. It relates to heavy containers.

  As a container for storing cosmetics such as lotion, shampoo, rinse, liquid soap, food seasoning, etc., an outer layer body that forms the outer shell of the container, and a volume-reducing and deformable container that can be stored inside the outer layer body A double container in which the outer layer body is provided with an opening for introducing outside air that communicates with the inner layer body so that only the inner layer body is reduced as the contents are dispensed ( Also known as a delamination container).

  Further, as a discharge method of the contents, a method using a pump attached to the mouth portion of the outer layer body, a method by squeezing the body portion of the outer layer body, and a method mainly based on the weight of the contents (for example, Patent Document 1). See). Containers that use pumps have a complicated structure and an inevitable increase in cost, and containers that use squeeze of the outer layer body are relatively simplified, but only the inner layer body is reduced in volume. In order to achieve this, it is necessary to provide an outside air introduction valve that closes the opening for introducing outside air when pressed against the outer layer body and opens when the pressure is released. On the other hand, a container that uses the weight of its contents has a simple structure and does not require an outside air introduction valve.

JP 2008-207860 A

  By the way, the inner layer body of the double container has been devised in various ways to reduce the volume evenly, but due to variations in the thickness of the container itself, a portion that tends to collapse preferentially occurs. is there. Thereby, when the discharge of the contents proceeds, the inner surfaces of the inner layer bodies may partially contact each other, and the passage of the contents may be narrowed. Even in such a case, if the pump is used or an external air introduction valve is provided, the contents can be discharged to the end.However, if the content is discharged by its own weight without having the external air introduction valve, the outer layer body is used. Even if the squeeze is performed, the air between the outer layer body and the inner layer body leaks from the opening for introducing the outside air, and the inner layer body cannot be sufficiently reduced in volume, which makes it difficult to discharge the contents. It was. For this reason, a new double container which improved this point was desired.

  An object of the present invention is to solve such conventional problems, and the object of the present invention is to discharge the contents mainly by its own weight and to reduce the remaining amount of the contents. However, there is a proposal for a new double container that can be discharged smoothly to the end and that does not increase the cost.

The present invention comprises an outer layer body that forms an outer shell of a container, and an inner layer body that can be reduced and deformed that is housed inside the outer layer body, and a linear shape that penetrates the bottom wall of the bottom wall of the outer layer body In a double container with a slit,
The side wall of the outer layer body includes a pressing portion that discharges contents by pressing the outer layer body in a crossing area with the extension line along the slit ,
The pressing part is a double container having a plurality of ribs which are convex outward from the side wall and are arranged in parallel at intervals .

  The pressing portion preferably has a rib that protrudes outward from the side wall or a groove that becomes concave toward the inside.

  It is preferable that the slit is provided in the central region of the bottom wall, and reinforcing ribs extending along the extension line are provided outside both ends of the slit.

  In the present invention, a double container including an inner layer body that can be volume-reduced and deformable and an outer layer body that accommodates the inner layer body on the inner side and includes a linear slit on the bottom wall, along the slit on the side wall of the outer layer body. The pressing part is provided in the crossing area with the extension line. And when the pressing part is pressed, the side wall of the outer layer body is recessed inward, while on the extension line along the slit of the bottom wall of the outer layer body, a force pulled outward acts, so that the slit can be narrowed. it can. As a result, even if the outer layer body is pressed, air leakage between the outer layer body and the inner layer body is reduced and the inner layer body can be easily reduced in volume, so that the contents can be discharged smoothly to the end. Is possible. Further, since it is not necessary to provide an outside air introduction valve that opens and closes the slit, the cost is not increased.

  When the pressing part is provided with a rib that protrudes outward from the side wall or a groove that is concave toward the inside, the rib or groove can function as a finger hook. Can be prevented from slipping. Further, by providing ribs or grooves, it is possible to make the pressing portion stand out and make the user recognize that the pressing portion is, so that the volume of the inner layer body can be reduced as expected.

  When the number of times the outer layer body is pressed increases and the slit is repeatedly deformed, there is a concern that cracks may develop from both ends of the slit, but a slit is provided in the center area of the bottom wall and the slit is formed outside both ends of the slit. In the case where the reinforcing rib extending along the extension line is provided, the strength of both ends of the slit can be increased by the reinforcing rib, so that the progress of the crack can be effectively prevented.

It is the side view and partial sectional view which show one Embodiment of the double container according to this invention along the arrow A of FIG. It is the side view and partial sectional view which show the double container shown in FIG. 1 along the arrow B of FIG. It is a bottom view regarding the double container shown in FIG.

Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 is a side view and a partial sectional view showing an embodiment of a double container according to the present invention along arrow A in FIG. 3, and FIG. 2 relates to the double container shown in FIG. FIG. 3 is a side view and a partial cross-sectional view shown along arrow B in FIG. 3, and FIG. 3 is a bottom view of the double container shown in FIG.

  In FIG. 1, the code | symbol 1 shows one Embodiment of the double container of this invention. The double container 1 includes an outer layer body 10 that forms an outer shell of the container, and an inner layer body 20 that is housed inside the outer layer body 10, and an inner plug 30, a dispensing plug 40, and a lid body on the upper part. 50. The double container 1 in this embodiment is formed by laminating an outer layer body 10 made of a synthetic resin and an inner layer body 20 formed of a synthetic resin having low compatibility with the outer layer body 10. This is obtained by blow molding a parison formed by laminating synthetic resins.

  The outer layer body 10 has reversible flexibility. As shown in FIGS. 1 and 3, the outer layer body 10 has a disk shape and forms a bottom portion of the outer layer body 10, and an edge of the bottom wall 11. A side wall 12 that is connected to the upper portion of the outer layer body 10 and is formed in a cylindrical shape and that forms a mouth portion of the outer layer body 10. 13. A threaded portion 13 a is provided on the outer peripheral surface of the mouth wall 13.

  Further, as shown in FIG. 3, a slit 14 is provided in the central region of the bottom wall 11 so as to penetrate the inside and outside of the outer layer body 10 and extend linearly. Further, on both outer sides of the end portion 14 a of the slit 14, rib-shaped reinforcing ribs 15 extending on the extension line L along the slit 14 are provided. In the present embodiment, the slit 14 is formed by cutting away the central area of the bottom of the parison with a blow mold, and the outer layer body 10 is sandwiched between the outer sides of the central area of the bottom of the parison with the split mold. Reinforcing ribs 15 are formed by pinch-off portions obtained by flattening the inner layer body 20 and the inner layer body 20 (hereinafter, the reinforcing ribs 15 are also referred to as pinch-off portions 15). The slit 14 introduces outside air between the outer layer body 10 and the inner layer body 20, but if the length of the slit 14 is too short, the opening length of the slit 14 is insufficient and sufficient outside air is introduced. On the other hand, if the length of the slit 14 is too long, the slit 14 cannot be sufficiently narrowed as will be described later. For this reason, in order to satisfy both of these contradictory functions, the slit 14 is appropriately set to an optimum length according to the rigidity of the outer layer body 10 and the like. Further, the pinch-off portion 15 is provided with a plurality of biting portions 16 that increase the bottom cracking strength of the pinch-off portion 15 by biting one side surface toward the other side surface.

  Furthermore, a pressing portion 17 for pressing the outer layer body 10 is formed on the side wall 12 on the intersection with the extension line L along the slit 14, in other words, on the parting line of the side wall 12 formed by the split mold. I have. In addition, a pair of pressing portions 17 are provided in an opposing arrangement with the central axis of the outer layer body 10 interposed therebetween in order to facilitate the pressing to the outer layer body 10. Further, as shown in FIG. 2, the pressing portion 17 is provided with ribs 17 a that protrude outward from the side wall 12, so that it is possible to effectively prevent finger slipping when pressing the outer layer body 10. In addition, although illustration is abbreviate | omitted, you may provide the groove | channel which becomes concave toward the inner side of the side wall 12 with the rib 17a or instead of the rib 17a.

  The inner layer body 20 has a filling space M in which the contents can be filled inside, and can be reduced in volume by being peeled off from the laminated outer layer body 10. Here, since the bottom portion of the inner layer body 20 is held by the pinch-off portion 15, the bottom portion of the inner layer body 20 moves to the mouth wall 13 side of the outer layer body 10 even when the discharge of the contents proceeds, and the filling space M A part is not blocked. In addition, although illustration is omitted, in order to avoid partial blockage of the filling space M as much as possible, between the outer layer body 10 and the inner layer body 20 extends in the vertical direction from the bottom wall 11 toward the mouth wall 13. Then, at least one adhesive band that partially joins the outer layer body 10 and the inner layer body 20 may be provided.

  As shown in FIG. 1, the inner plug 30 includes an annular wall 32 that surrounds a cylindrical wall 31 erected at the center thereof and is connected to a lower portion of the cylindrical wall 31 via a flange. Further, a flange portion 33 is provided at the upper end edge of the annular wall 32 so as to extend outward in the radial direction and to come into contact with the upper end of the mouth wall 13. In the lower part of the cylindrical wall 31, an inclined wall 34 that is reduced in diameter toward the lower side is provided. A plurality of vertical ribs 35 provided at intervals in the circumferential direction are provided on the inner peripheral surface of the cylindrical wall 31.

  Further, a spherical body 36 is arranged on the inner side in the radial direction of the vertical rib 35. Here, the spherical body 36 moves by its own weight along the vertical rib 35, and when the double container 1 is in the standing posture as shown in FIG. 1, it extends over the inclined wall 34 and the entire circumference. The filling space M of the inner layer body 20 is closed by contact. Note that the upper ends of the vertical ribs 35 slightly bulge toward the inside in the radial direction, and form a stopper for the spherical body 36.

  The pouring stopper 40 includes a pouring cylinder 41 that communicates with the cylindrical wall 31. The pouring cylinder 41 extends outward in the radial direction and is connected to a ceiling wall 42 that is located on the flange portion 33. Yes. An outer peripheral wall 43 surrounding the mouth wall 13 is connected to the edge of the top wall 42. A screw portion 43 a corresponding to the screw portion 13 a of the mouth portion wall 13 is provided on the inner peripheral surface of the outer peripheral wall 43. Thereby, the spout 40 is screwed to the mouth wall 13 with the inner plug 30 interposed therebetween.

  The lid 50 connects the peripheral wall 52 to the edge of the top wall 51 that covers the top of the spout 40, and, as shown in FIG. 2, a hinge 53 provided between the peripheral wall 52 and the outer peripheral wall 43. To be connected. In addition, you may make it screw the pouring stopper 40 and the cover body 50 without providing the hinge 53. FIG. On the lower surface of the top wall 51, there is provided a seal tube 54 that comes into liquid-tight contact with the dispensing tube 41. A pin 55 extending downward is provided on the radially inner side of the seal cylinder 54. The pin 55 is provided so as to come into contact with the spherical body 36 before reaching the upper limit when the spherical body 36 is displaced upward. As a result, even if the spherical body 36 moves vigorously upward due to transportation or the like, it does not come off beyond the retaining provided on the vertical rib 35.

  When pouring the contents from the double container 1 configured as described above, the spherical body 36 is placed on the side of the dispensing cylinder 41 by opening the lid 50 and tilting or inverting the double container 1. The content in the filling space M passes through the vertical ribs 35 from the opening of the inclined wall 34 by its own weight, and is discharged from the dispensing cylinder 41. At this time, since the outside air is introduced between the outer layer body 10 and the inner layer body 20 through the slit 14, only the inner layer body 20 is reduced in volume while maintaining the shape of the outer layer body 10.

  As the discharge of the contents progresses and the remaining amount decreases, the weight of the entire contents decreases, so that it becomes difficult for the contents to be discharged simply by tilting the double container 1. Here, when the pressing portion 17 is pushed inward as shown in FIG. 1, the side wall 12 is recessed inward as shown by the broken line, while the bottom wall 11 is shown by the solid arrow in FIGS. 1 and 3. A pulling force acts radially outward in the direction along the extension line L of the slit 14 where the pressing portion 17 is located. Thereby, since the slit 14 can be narrowed, the amount of air leaked between the outer layer body 10 and the inner layer body 20 from the slit 14 is reduced, and the inner layer body 20 is sufficiently pressed. The contents that are difficult to be discharged by their own weight can be discharged to the end. In addition, since the tension | tensile_strength which was acting on the slit will also be cancelled | released if a press is cancelled | released, external air is fully introduce | transduced between the outer layer body 10 and the inner layer body 20. FIG.

  In the present embodiment, the outer layer body 10 and the inner layer body 20 have been described as being obtained by blow molding a laminated parison. However, the present invention is not limited to this. For example, a previously formed inner layer body is used as the outer layer body. The thing of the form to accommodate may be sufficient. Moreover, you may make it provide a slit by post-processing with respect to an outer-layer body. Further, the reinforcing rib may be formed only by the outer layer body without using the pinch-off portion in which the outer layer body and the inner layer body are crushed flat.

  According to the present invention, the content can be discharged mainly by its own weight, and even when the remaining amount of the content decreases, the content can be smoothly discharged to the end by pressing the outer layer body. Further, since there is no need for an outside air introduction valve which is necessary for a normal squeeze container, a novel double container capable of sufficiently suppressing costs can be provided.

DESCRIPTION OF SYMBOLS 1 Double container 10 Outer layer body 11 Bottom wall 12 Side wall 13 Mouth wall 13a Screw part 14 Slit 14a End part of slit 15 Reinforcement rib (pinch-off part)
16 Biting portion 17 Pressing portion 17a Rib 20 Inner layer 30 Inner plug 31 Cylindrical wall 32 Annular wall 33 Flange portion 34 Inclined wall 35 Vertical rib 36 Spherical body 40 Outlet plug 41 Outlet tube 42 Top wall 43 Outer wall 43a Threaded portion 50 Lid 51 Top wall 52 Peripheral wall 53 Hinge 54 Seal cylinder 55 Pin L Extension line along slit M Filling space

Claims (3)

An outer layer body that forms an outer shell of the container, and an inner layer body that can be reduced and deformed that is housed inside the outer layer body, and a linear slit that penetrates the bottom wall is provided on the bottom wall of the outer layer body. In heavy container,
The side wall of the outer layer body includes a pressing portion that discharges contents by pressing the outer layer body in a crossing area with the extension line along the slit ,
The pressing part is a double container having a plurality of ribs which are convex outward from the side wall and are arranged in parallel at intervals . The pressing portion is double container according to claim 1 having a groove as a concave toward the inner side from the side wall.   The double container according to claim 1, wherein the slit is provided in a central region of the bottom wall, and reinforcing ribs extending along the extension line are provided outside both ends of the slit.

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