TWI780286B - Laminated peel container - Google Patents

Abstract

Provided is a laminated peelable container in which an outer shell and an inner bag are not accidentally peeled off at the tip of the mouth, and the quality and reliability are high.

According to the present invention, there is provided a laminated peelable container which has an outer shell and an inner bag, and the inner bag shrinks as contents contained in the inner bag decrease, wherein a container body and a protective member are provided. The container main body has a mouth, and the end surfaces of the outer casing and the inner bag are exposed at the front end of the mouth, and the protection member is attached to the mouth so as to protect the end surfaces.

Description

Laminated peel container

The present invention relates to a laminated peelable container in which an inner bag shrinks as contents are discharged.

(1st point of view)

Conventionally, there have been known a container body that has an outer container and an inner bag, and a container body that shrinks the inner bag as the contents are reduced, and a counter that adjusts the air in and out between the space between the outer container and the inner bag and the outer space of the container body. A laminated peel-off container with a check valve (for example, refer to Patent Documents 1 to 2).

In the laminated peel container disclosed in Patent Document 1, a valve is built in a cap attached to the mouth of the container body. In the laminated peel container disclosed in Patent Document 2, a valve is provided inside the body of the casing.

(2nd point of view)

There is known a laminated peelable container that has an outer shell container and an inner bag, and the inner bag shrinks as the content decreases (for example, refer to Patent Document 3). The laminated peel container of Patent Document 3 has a hole in the bottom, and the external air is introduced between the main body and the liner as the contents are discharged.

[Prior Art Literature]

【Patent Literature】

[Patent Document 1] Japanese Unexamined Patent Publication No. 2013-35557

[Patent Document 2] JP-A-4-267727

[Patent Document 3] JP-A-2000-335635

(1st point of view)

Then, such a laminated peel container is manufactured by extruding a laminated parison in a molten state, blow molding it, and cutting and removing unnecessary parts after blow molding. Cutting off of this unnecessary portion is usually performed with a cutter.

At this time, the end face of the cut outer shell and the end face of the inner bag are exposed at the front end of the mouth of the laminated peel container cut by the knife. At the front end of the mouth exposed on the end faces of the outer shell and the inner bag thus laminated, the inner bag may be accidentally peeled off from the outer shell, which may cause damage to the quality and reliability of the laminated peelable container. In particular, in pump-type lamination and peeling containers, there are interferences when filling nozzles or inserting pumps, etc., friction with seals when pumps are tightened, negative pressure in the container during pump operation, etc., causing the inner bag at the mouth to roll up. And the possibility of falling off. If the inner bag at the mouth is peeled off, there is a possibility that a built-in substance will intrude between the outer shell and the inner bag, and when a built-in substance invades, it may cause problems such as leakage from the external air introduction hole.

A first aspect of the present invention is made in view of such circumstances, and provides a laminated peelable container in which an outer shell and an inner bag are not accidentally peeled off at the tip of the mouth, and has high quality and reliability.

(2nd point of view)

However, in a container like Patent Document 3, if the contents are discharged in a bathroom or the like while the bottom is wet, water may be absorbed between the main body and the pad through the holes in the bottom. Since it is difficult to drain the water between the main body and the gasket, if it is not treated, it will cause mold and the like.

The 2nd viewpoint of this invention is made|formed in view of such a situation, and provides the laminated peeling container which suppresses water from entering the intermediate space between an outer shell and an inner bag.

According to a first aspect of the present invention, there is provided a laminated peelable container having an outer shell and an inner bag, and the inner bag shrinks as the content contained in the inner bag decreases. The container body has a mouth, and the end faces of the outer shell and the inner bag are exposed at the front end of the mouth, and the protection member is attached to the mouth so as to protect the end faces.

In the laminated peelable container of the present invention, since the protective member that protects the end faces of the outer shell and the inner bag is attached to the mouth, peeling of the outer shell and the inner bag is reliably suppressed.

Hereinafter, various embodiments of the first viewpoint of the present invention will be illustrated. The embodiments shown below can be combined with each other.

Preferably, in the laminated peelable container, the protective member includes an annular end surface covering portion and an annular rib portion, the end surface covering portion covers the end surfaces of the outer shell and the inner bag, and the rib portion abuts against the end surface of the inner bag. the inner peripheral surface of the mouth.

Preferably, in the laminated peeling container, the end surface covering portion is configured so as not to protrude from the outer edge of the front end.

Preferably, in the laminated peeling container, assuming that the radius of the circumscribed circle of the end surface coating portion is R1, and the radius of the circumscribed circle of the front end is R2, then R1/R2<1.

Preferably, in the laminated peelable container, the end surface coating portion includes a base portion and a narrow portion having a width smaller than that of the base portion, and in the narrow portion, the outer edge of the front end and the narrow portion A width between outer edges of the end surface covering portion is greater than that of the base portion.

Preferably, in the laminated peeling container, an annular convex portion is provided on the upper surface of the end surface coating portion.

Preferably, in the laminated peeling container, a section perpendicular to the circumferential direction of the annular protrusion has a tapered shape.

Preferably, in the laminated peel container, the protective member is fitted to the mouth by pressing the rib into the mouth.

Preferably, in the laminated peeling container, the rib includes a constricted portion whose diameter becomes smaller toward a tip of the rib.

Preferably, in the laminated peel container, the holding member is made of polyolefin.

Preferably, in the laminated peel container, the protective member is an annular member welded to the Describe the end face.

Preferably, in the laminated peeling container, the protective member is a disc-shaped member welded to the end surface.

Preferably, in the laminated peeling container, the diameter of the front end of the mouth is enlarged, and the outer shell and the inner bag are inclined.

Preferably, in the lamination peeling container, the lamination peeling container is a pump type container.

According to a second aspect of the present invention, there is provided a laminated peelable container including a container body having an outer shell and an inner bag, the inner bag shrinks as the content decreases, and the container body First and second external air introduction holes are provided, the container main body has an accommodation portion for accommodating the contents, and a mouth portion for discharging the contents from the accommodation portion, and the first and second outside air introduction holes are respectively The intermediate space between the outer shell and the inner bag is provided in such a way as to communicate with the external space of the container body, the first external air introduction hole is provided at the bottom of the accommodating part, and the second external air introduction hole is provided at the bottom of the container. Holes are provided at positions other than the bottom.

In the present invention, since the second external air introduction hole is arranged at a position other than the bottom, when the bottom is wet, external air can be introduced into the intermediate space through the second external air introduction hole, thereby preventing water from entering the space between the outer shell and the inner bag. the intermediate space between. And, if only the 2nd outside air introduction hole, when the 2nd outside air introduction hole is closed by shrink film etc., it may be difficult to introduce the outside air into the intermediate space, but in the present invention, because the 1st outside air introduction hole is arranged on bottom, thus reducing the possibility that outside air is difficult to introduce into the intermediate space.

Hereinafter, various embodiments of the second viewpoint of the present invention will be illustrated. The embodiments shown below can be combined with each other.

Preferably, in the laminated peeling container, the bottom portion is provided with a sealing portion for sealing the inner bag, and the first external air introduction hole is provided between the sealing portion and the outer shell.

Preferably, in the laminated peeling container, a second outside air introduction hole is provided in the housing portion.

Preferably, a pump capable of sucking out the contents is mounted on the mouth of the laminated peeling container.

Preferably, the pump is provided with a check valve in the lamination peeling container.

1:Laminated stripping container

2: container body

4: Mouth

4a: front end

4b: Small diameter part

4d: engaging part

7:Accommodating part

7a: concave part

7b: Flow tank

7c: bottom

7d: pinch-off part

7e: ground plane

11: Shell

11d: end face

12: Inner bag

12a: sealing part

12d: end face

15: Outer air introduction hole

15a: The first external air introduction hole

15b: The second external air introduction hole

21: middle space

22: pump

23: block

23c: engaging part

23f: Barrel

23k: Through hole

23t: upper part

24: Cylinder

24c: Suction port

24d: storage space

25: Catheter

26: Piston

27: Nozzle head

27a: Outlet

30: block

31: fixed part

31a: external thread part

32: Cap body

32a: internal thread part

33: check valve

35: Inner ring

36: Seat part

37: Press parts

38: injection hole

40: Protective parts

41: Rift

42: Rib

42a: shrink neck

43: End surface coating part

43a: Backward part

43b: Annular convex part

45: Cover

47: wide area

50: pump

51: nozzle part

52: Installation department

53: suction tube

60: Gasket

61: coil spring

62: check valve

63: check valve

FIG. 1 is a perspective view of a laminated peeling container 1 according to a first embodiment of the first viewpoint of the present invention.

FIG. 2 is an exploded perspective view of the vicinity of the mouth 4 in FIG. 1 .

Fig. 3 is a sectional view of the vicinity of the mouth portion 4 in Fig. 1 (the mounting portion 52 is a sectional view, and the other parts are a right side view).

Fig. 4 is an enlarged view showing only the mouth 4 and the protective member 40 in the region A in Fig. 3, Fig. 4A shows the state before the protective member 40 is installed in the mouth 4, and Fig. 4B shows that the protective member 40 is installed in the mouth Section 4 status.

FIG. 5 is a perspective view of the protective member 40 .

FIG. 6 is a plan view showing only the front end 4 a of the mouth 4 and the protection member 40 . For the convenience of illustration, the protective component 40 is hatched.

FIG. 7 shows a modified example of the protective member 40 and is an enlarged view corresponding to FIG. 4B .

FIG. 8 is a view showing the mouth attachment of the lamination and peeling container 1 according to the second embodiment of the first aspect of the present invention. 8A is a schematic perspective view showing the state before installation of the ring-shaped protective member 40, FIG. 8B is a schematic perspective view showing the welded state of the ring-shaped protective member 40, and FIG. A schematic cross-sectional view of the welded state.

Fig. 9 is a schematic sectional view of main parts showing a state where a cap is attached to the container body 2 according to the second embodiment of the first aspect of the present invention.

10 is a view showing the vicinity of the mouth of the delamination container 1 according to the third embodiment of the first viewpoint of the present invention, FIG. 10C is a schematic cross-sectional view showing the welded state of the disc-shaped protective member 40 .

Fig. 11 is an exploded perspective view of a ring-shaped protective member 40 attached to a laminated peeling container 1 having an enlarged mouth tip in a fourth embodiment according to the first viewpoint of the present invention.

Fig. 12 is a diagram showing the vicinity of the mouth of the lamination and peeling container 1 according to the fifth embodiment of the first aspect of the present invention, Fig. 12A is a schematic perspective view showing a state before attachment of the ring-shaped protective member 40, and Fig. 12B is a view showing the ring A schematic perspective view of a welded state of the protective member 40.

Fig. 13 is a front view of the laminated peeling container 1 according to the first embodiment of the second viewpoint of the present invention.

Fig. 14 is a front view of a state where the container body 2 is pulled out from Fig. 13 .

Fig. 15 is an A-A sectional view of Fig. 13 .

In FIG. 16 , FIG. 16A is an enlarged view of the cap 23 in FIG. 15 , and FIG. 16B is an enlarged view of the pump 22 in FIG. 15 .

FIG. 17 is an enlarged view near the bottom 7c of FIG. 15 .

Fig. 18 is a front view of the container body 2 of the lamination and peeling container 1 according to the second embodiment of the second viewpoint of the present invention.

Fig. 19 is a perspective view of the container body 2 of Fig. 18 viewed from the bottom 7c side.

FIG. 20 is a perspective view corresponding to FIG. 19 of the container main body 2 of the lamination and peeling container 1 according to the third embodiment of the second aspect of the present invention.

Embodiments of the present invention will be described below. Various characteristic items described in the embodiments shown below may be combined with each other. Moreover, each feature independently establishes the invention.

1. 1st point of view

1-1． first embodiment

As shown in FIGS. 1 to 7 , the lamination and separation container 1 according to the first embodiment of the first aspect of the present invention includes a container main body 2 , a protective member 40 , a pump 50 , and a gasket 60 .

<container body 2>

The container main body 2 has an accommodating portion 7 for accommodating the contents, and a mouth portion 4 for discharging the contents from the accommodating portion 7 . As shown in FIGS. 3 to 4 , the container body 2 includes an outer shell 11 made of an outer layer and an inner bag 12 made of an inner layer in the housing portion 7 and the mouth 4 , and the inner bag 12 shrinks as the contents decrease. The outer shell 11 and the inner bag 12 are molded in an integrated state by blow molding of multi-layer parisons. As the usage method, for example, before use, the inner bag 12 is peeled off from the outer shell 11 at a position other than the mouth portion 4. , fill the contents into the inner bag 12 and attach it to the outer shell 11. Squeeze out the inner content, so that the inner bag 12 can shrink smoothly. Alternatively, in a state where the inner bag 12 is joined to the outer case 11, the inner bag 12 may be moved along with the contents. The discharge inner bag 12 is peeled from the outer shell 11 and shrunk.

The outer case 11 is formed to be thicker than the inner bag 12 to have high resilience. The casing 11 is made of, for example, low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, ethylene-propylene copolymer, and mixtures thereof. The shell 11 can also be a multi-layer structure. The inner bag 12 is preferably a multilayer structure. For example, an EVOH layer made of ethylene-vinyl alcohol copolymer (EVOH) resin is used for the layer in contact with the outer layer, and an EVOH layer made of low-density polyethylene, linear low-density polyethylene, or high-density polyethylene is used for the layer in contact with the inner part. Inner surface layer composed of polyolefins such as ethylene, polypropylene, ethylene-propylene copolymer and mixtures thereof. Furthermore, it is preferable to use an adhesive layer between the EVOH layer and the inner surface layer.

As shown in FIGS. 1 to 3 , a concave portion 7 a is formed in the housing 11 on the shoulder of the housing portion 7 , and an external air introduction hole 15 is provided there. The outside air introduction hole 15 is a through hole provided only in the outer casing 11 and does not reach the inner bag 12 . In addition, by introducing air through the outside air introduction hole 15 , outside air can be introduced between the outer case 11 and the inner bag 12 .

FIG. 4 shows the vicinity of the mouth 4 of the container main body 2. For the container main body 2 that has been cut to remove unnecessary parts after blow molding, as shown in FIG. 11 d of cut end faces, and 12 d of cut end faces of the inner bag 12 . In this way, if the end surface 11d of the outer case 11 or the end surface 12d of the inner bag 12 is exposed, there is a possibility that the inner bag 12 will start peeling off unexpectedly from there.

<protection part 40>

In the laminated peel container 1 of the present embodiment, a protective member 40 is attached to the mouth 4 to protect the exposed end face 11d of the outer shell 11 or the end face 12d of the inner bag 12 to prevent peeling of the inner bag 12 . The protection member 40 is attached to the end faces 11d, 12d.

The protection member 40 includes an annular end surface covering portion 43 and an annular rib (sleeve) 42 . The end surface covering part 43 covers the end surfaces 11d and 12d of the outer case 11 and the inner bag 12 . The rib 42 is in contact with the inner peripheral surface of the mouth 4 . The end surface covering portion 43 and the rib portion 42 are preferably annular.

As shown in FIG. 4 , assuming that the radius of the circumscribed circle of the end surface coating portion 43 is R1, and the radius of the circumscribed circle of the front end 4a of the mouth 4 is R2, R1/R2<1. At this time, the outer edge of the end surface covering portion 43 does not protrude beyond the outer edge of the front end 4 a of the mouth portion 4 . If the outer edge of the end surface covering part 43 protrudes from the outer edge of the front end 4a of the mouth part 4, when the container is taken out from the packaging or on the filling line, etc., when something gets stuck on the protruding part of the end surface covering part 43, it is possible to As a result, the protective member 40 falls off from the mouth 4 . On the other hand, in the present embodiment, since there is no protruding portion in the end surface covering portion 43 , falling off of the protection member 40 is suppressed. R1/R2 is, for example, 0.900 to 0.995, specifically, for example, 0.900, 0.910, 0.920, 0.930, 0.940, 0.950, 0.960, 0.970, 0.980, 0.990, 0.995, and the range between any two numerical values exemplified here may also be used. Inside. In this embodiment, R1/R2 is about 0.986.

It should be noted that, as shown in FIG. 7 , in the case of R1/R2=1, the end surface covering portion 43 does not have a protruding portion, but at this time, if the end surface covering portion 43 is slightly larger due to unevenness caused during manufacturing, Then, the outer edge of the end surface covering portion 43 protrudes beyond the outer edge of the front end 4a of the mouth portion 4, so R1/R2<1 is preferable, and 0.995 or less is more preferable.

The area ratio of the end surface covering portion 43 covering the end surfaces 11d and 12d is, for example, 30 to 99%, preferably 60 to 95%, specifically, for example, 30, 40, 50, 60, 70, 80, 90, 91, 92, 93%. , 94, 95, 96, 97, 98, 99%, or within the range between any two numerical values exemplified here. The end surface covering portion 43 preferably covers the boundary between the end surfaces 11d and 12d. Thereby, peeling of the inner bag 12 is suppressed more effectively. In this embodiment, the area ratio is about 92%.

As shown in FIG. 6, the width W between the outer edge of the front end 4a of the mouth 4 and the outer edge of the end surface covering portion 43 is almost constant over the entire circumference, but in a wide region 47 provided in a part of the circumferential direction, the width W W is larger than the area outside it. When the protective member 40 is injection-molded, burrs may remain at the position of the inlet and outlet, but by arranging the inlet and outlet at positions corresponding to the wide region 47, even if burrs remain, the burrs can be prevented from protruding from the opening. The outer edge of the front end 4a of the mouth part 4. The angle range for setting the wide region 47 is, for example, 5 to 90 degrees, preferably 10 to 30 degrees, specifically, for example, 5, 10, 15, 20, 25, 30, 40, 50, 60, 70, 80, 90 degrees, or within the range between any two numerical values exemplified here. In this embodiment, the angular range is about 23 degrees.

The outer edge of the end surface covering portion 43 is substantially circular, and a receding portion 43 a receding from the outer periphery of the circle is provided in a part thereof. The wide area 47 is formed by providing the receded portion 43 a in the end surface covering portion 43 . In this embodiment, the receded part 43a is provided by making the outer edge of the end surface covering part 43 linear. In addition, the width of the end surface covering portion 43 is substantially constant over the entire circumference, and the width of the end surface covering portion 43 is narrowed by a component corresponding to the retreat of the outer edge at the receded portion 43 a.

An annular convex portion 43 b is provided on the upper surface of the end surface covering portion 43 . When the protective member 40 is formed of a relatively hard-to-deform material like polyolefin, a gap is easily formed between the protective member 40 and the pump 50 . However, by providing the annular convex portion 43b, when the pump 50 is attached to the mouth portion 4, the annular convex portion 43b is pressed and elastically deformed, so that a gap hardly occurs between the protective member 40 and the pump 50. The cross section perpendicular to the circumferential direction of the annular convex portion 43b is preferably a tapered shape. At this time, since the closer to the front end of the annular convex portion 43b, the deformation is easier, so it is difficult to form a gap between the protection member 40 and the pump 50 . The tapered shape is preferably a triangular shape.

As shown in FIG. 4A , in the state where the protective member 40 is not installed in the mouth 4, the radius of the circumscribed circle of the rib 42 is R3, and the radius of the inscribed circle of the mouth 4 at the position where the rib 42 abuts is When the radius is R4, R3/R4 is 1.01 or more. At this time, since the outer diameter of the rib 42 is slightly larger than the inner diameter of the mouth 4 , the protective member 40 is pressed into the mouth 4 , and the protective member 40 is easily held in the mouth 4 stably. The rib 42 includes a constricted portion 42 a whose outer diameter becomes smaller toward the front end of the rib 42 . The press-fitting of the protection member 40 becomes easy by providing the constricted part 42a. In addition, the protection member 40 may be attached to the mouth part 4 by welding.

<Pump 50, Gasket 60>

The pump 50 includes a nozzle portion 51 for pressing operation, an attachment portion 52 to the container body 2 , and a suction tube 53 inserted into the container body 2 . The pump 50 is screwed into the mouth part 4 to which the protective member 40 is attached, and is attached with the gasket 60 interposed therebetween. Sealing performance can be ensured by interposing the gasket 60 . When not needed, the gasket 60 can be omitted.

In the case of a pump-type lamination and peeling container, there is interference when inserting the filling nozzle or pump, etc., especially due to the screw-in method, the friction of the gasket when screwing the pump in, the negative pressure in the container when the pump is running, etc. The inner bag at the mouth may roll up and fall off, but by attaching the protective member 40, the inner bag 12 will not be peeled off even if such force is applied.

When the nozzle part 51 is operated and the contents in the inner bag 12 are discharged from the mouth part 4, the inner bag 12 shrinks. As the inner bag 12 shrinks, outside air is introduced between the inner bag 12 and the outer case 11 through the outside air introduction hole 15 . Therefore, the outer shell 11 does not shrink, but the inner bag 12 shrinks away from the outer shell 11 .

1-2． 2nd embodiment

In this embodiment, as shown in FIG. 8A , the protective member 40 is, for example, an annular (ring-shaped) aluminum foil. As shown in FIG. 8B and FIG. 8C , this is attached by welding by abutting against the front end of the mouth portion 4 (that is, the end surface 11d of the outer shell 11 or the end surface 12d of the inner bag 12). It is preferable to have a welding margin of about 1 mm at the end of the mouth portion 4 . The protective member 40 is welded to fix the outer case 11 and the inner bag 12 via the protective member 40 , thereby suppressing unintentional peeling of the inner bag 12 .

FIG. 9 shows an attached state of the cap 30 to the container body 2 to which the protective member 40 is attached (welded). The cap 30 is installed on the mouth 4 of the container main body 2, as shown in Figure 9, it consists of a fixing part 31 directly fixed to the mouth 4 of the container main body 2 by pressing, and is screwed on the fixing part 31. The cap main body 32 constitutes the external thread portion 31a on the outer peripheral surface of the cap. The inner surface of the cap main body 32 is provided with an internal thread portion 32a.

The fixing part 31 is attached to the mouth part 4 of the container main body 2 by crimping, and the external thread part 31a is formed in the outer peripheral surface.

The cap main body 32 is composed of a cover 45 covering the spout by a check valve 33 or a hinge (not shown), and has an inner ring 35 that abuts on the inner peripheral surface of the mouth 4 when assembled. The check valve 33 is fitted into the inner ring 35 so as to close the injection hole 38 provided in the valve seat portion 36 in the inner ring 35 , and the outer peripheral portion of the check valve 33 is pressed and fixed by the pressing member 37 .

The cap main body 32 is screwed to the fixing part 31, so that the inner ring 35 of the cap main body 32 enters into the mouth 4, and its outer peripheral surface abuts against the inner peripheral surface of the mouth 4 to be in a closed state.

In the present embodiment, the contents in the inner bag 12 can be discharged from the mouth 4 by applying a compressive force to the outer case 11 . When a force is applied to the case 11 after the contents are discharged, the case 11 tends to return to its original shape due to its own restoring force. At this time, outside air is introduced between the inner bag 12 and the outer case 11 through the outside air introduction hole 15 . In addition, a valve (not shown) may be attached to the external air introduction hole 15 . This valve is configured to close the external air introduction hole 15 when a compressive force is applied to the casing 11, and to open the external air introduction hole 15 when a compressive force is applied. At this time, it is easy to transmit the compressive force applied to the outer shell 11 to the inner bag 12 .

1-3． third embodiment

In this embodiment, as shown in FIG. 10A , the protection member 40 is a disk-shaped protection member 40 (for example, disc-shaped aluminum foil). The disk-shaped protective member 40 is brought into contact with the front end (11d of the end surface 11d of the outer case 11 or the end surface 12d of the inner bag 12) of the mouth part 4, and is welded. At this time, as shown in FIG. 10B and FIG. 10C , since the mouth 4 of the container body 2 is closed by the protective member 40 , it is preferable to break the middle part of the protective member 40 and unseal it at the beginning of use. As means for facilitating unsealing, a cross-shaped slit 41 or a half-cut or the like may be provided in the middle of the disk-shaped protective member 40 .

1-4． 4th embodiment

The protective member 40 is installed (welded) on the end surface 11d of the outer shell 11 and the end surface 12d of the inner bag 12 at the front end 4a of the mouth 4, and the diameter of the front end of the mouth 4 is enlarged to expand the contact area and further stabilize the fixed state . For example, as shown in FIG. 11 , if the front end of the mouth 4 is expanded in diameter, the outer shell 11 or the inner bag 12 is inclined at the front end of the mouth 4, and the end faces 11d, 12d are cut obliquely with respect to the thickness direction. As a result, the dimensions of the end surfaces 11d and 12d exposed to the front end of the mouth portion 4 are enlarged, and when welding, the welding area is enlarged and the fixing is more stable.

1-5． fifth embodiment

In the present embodiment, as shown in FIG. 12A , a portion where the outer casing 11 and the inner bag 12 are level is provided near the mouth 4 , and the front end is cut so that it stands up slightly. At this time, as shown in FIG. 12B , the outer shell 11 and the front end portions of the inner bag 12 are split by welding, so that the protective member 40 and the inner bag 12 are brought into surface contact.

1-6． other implementations

Embodiments to which the present invention is applied have been described above, but the present invention is not limited to these embodiments. Various changes can be made without departing from the scope of the present invention. For example, not limited to the pump type, the present invention can be effectively applied to a container with a screw-in type cap because the inner bag may be peeled off from the outer shell due to the frictional force applied by rotation.

2. 2nd point of view

2-1． first embodiment

As shown in FIGS. 13 to 17 , the lamination and peeling container 1 according to the first embodiment of the second viewpoint of the present invention includes a container main body 2 , a pump 22 , and a cap 23 . The container main body 2 has an accommodating portion 7 for accommodating the contents, and a mouth portion 4 for discharging the contents from the accommodating portion 7 . The bottom 7c is the bottom of the housing portion 7 . The container main body 2 is provided with first and second outside air introduction holes 15a, 15b. The external air introduction hole 15a is provided in the bottom part 7c. The outside air introduction hole 15 b is provided in the housing part 7 .

As shown in FIG. 15 , the container main body 2 includes an outer case 11 and an inner bag 12 in the accommodating portion 7 and the mouth portion 4 . As the content decreases, the inner bag 12 is peeled off from the outer shell 11 to shrink.

Since it is the same as the first point of view, the specific description of the outer case 11 and the inner bag 12 will be omitted.

As shown in FIGS. 15 and 17 , the bottom portion 7 c is provided with a sealing portion 12 a that seals the inner bag 12 . The outside air introduction hole 15 a is provided between the sealing portion 12 a and the casing 11 . The intermediate space 21 between the outer casing 11 and the inner bag 12 and the external space S of the container main body 2 are separated by the external air introduction hole 15a.

When manufacturing the container main body 2 by blow molding, the sealing portion 12a and the outside air introduction hole 15a are provided The pinch-off portion 7d is formed by sandwiching cylindrical laminated parisons. The strength of the outer shell 11 of the pinch-off portion 7d is low, so even if the external air introduction hole 15a is not formed immediately after the manufacture of the container body 2, an impact will be applied to the pinch-off portion 7d, so that the pinch-off portion will be damaged. The casing 11 of 7d is broken, and the external air introduction hole 15a is formed. It should be noted that, in this embodiment, the pinch-off portion 7d just protrudes from the bottom portion 7c, but it may not protrude.

As shown in FIG. 13 , the accommodating portion 7 is provided with a concave portion 7 a provided with an outside air introduction hole 15 b. The outside air introduction hole 15 b is a through hole provided only in the casing 11 , and communicates the intermediate space 21 and the external space S. As shown in FIG.

The mouth portion 4 is provided with an engaging portion 4d capable of engaging with the cap 23 . The cap 23 can be assembled in a press-fit manner, or in a screw-in manner. In addition, a small-diameter portion 4b in which the container main body becomes narrower inwardly is provided at the base of the mouth portion 4 .

As shown in FIG. 16A , the cap 23 includes an upper portion 23t, an insertion hole 23k provided in the upper portion 23t, a cylindrical portion 23f extending in a cylindrical shape from the outer periphery of the upper portion 23t, and an engaging portion provided along the inner peripheral surface of the cylindrical portion 23f. 23c. The engaging portion 23c is an annular protrusion capable of engaging with the engaging portion 4d of the mouth portion 4 .

The pump 22 is configured to be able to suck out the contents in the container main body 2 . Specifically, as shown in FIG. 16B , the pump 22 includes a cylindrical cylinder 24 , a piston 26 , a cylindrical liquid catheter 25 , and a nozzle head 27 . The air cylinder 24 is inserted into the port 4 . The piston 26 is configured to slide inside the air cylinder 24 to suck up the contents in the container main body 2 . The catheter 25 is configured to guide the content in the container body 2 to the air cylinder 24 . nozzle The head 27 has a discharge port 27a for discharging the contents sucked up by the piston 26 .

The piston 26 is always biased upward (in a direction away from the suction port 24c of the cylinder 24) by the coil spring 61 accommodated in the cylinder 24. A check valve 62 is provided in the air cylinder 24 so that the contents in the accommodation space 24 d of the air cylinder 24 will not flow back into the container main body 2 . In addition, a check valve 63 is provided along the route from the storage space 24d to the discharge port 27a so that outside air does not enter the storage space 24d.

Here, the function and effect of the laminated peeling container 1 of the present embodiment will be described.

After accommodating the contents in the accommodating part 7, as shown in FIG. 13, in the state where the pump 22 and the cap 23 are mounted, if the nozzle head 27 is pressed, the contents in the accommodating space 24d of the air cylinder 24 are discharged from the discharge port 27a. thing. Next, when the hand is released from the nozzle head 27, the piston 26 is moved upward by the urging force of the coil spring 61, and the inside of the accommodation space 24d is decompressed. Thereby, the contents are sucked up to the storage space 24d while the check valve 62 is opened.

When the contents are sucked up, the inner bag 12 shrinks. With the suction of the built-in, the shell 11 will also have the effect of contraction force, but because the shell 11 is provided with the external air introduction holes 15a, 15b, so the external air is quickly introduced into the intermediate space 21 through the external air introduction holes 15a, 15b , the outer shell 11 is peeled off from the inner bag 12 by the restoring force of the outer shell 11 and returns to its original shape.

In this embodiment, since the outside air introduction holes 15a, 15b are provided, when the bottom 7c is immersed in water, the outside air is introduced through the outside air introduction holes 15b provided at positions other than the bottom 7c, thereby suppressing the The manufactured water penetrates into the intermediate space 21 . In addition, when the outside air introduction hole 15b is closed by a shrink film or the like, outside air can be introduced from the outside air introduction hole 15a provided in the bottom portion 7c. Therefore, in this embodiment, it is possible to reliably introduce outside air into the intermediate space 21 while preventing water from entering the intermediate space 21 .

The contents in the container body 2 are discharged from the discharge port 27a through the above steps, and the inner bag 12 is peeled from the outer casing 11 to shrink.

The present invention can also be implemented in the following modes.

‧The result of the pump and cap of the above-mentioned embodiment is an example, and a pump of another structure may be used, and the cap may be omitted if not necessary.

‧In the above-mentioned embodiment, the external air introduction hole 15 b is provided in the housing part 7 , but the external air introduction hole 15 b may be provided in the mouth part 4 .

‧In the above-mentioned embodiment, the external air introduction hole 15b is not equipped with a valve, but it may be equipped with a valve capable of directing the external air to the intermediate space 21 .

2-2． 2nd embodiment

A laminated peeling container according to a second embodiment of the second aspect of the present invention will be described with reference to FIGS. 18 to 19 . This embodiment is similar to the first embodiment, and the difference in the shape of the housing 11 is the main difference. Hereinafter, the difference will be mainly explained.

In the present embodiment, the container main body 2 is provided with a circulation groove 7b extending from the concave portion 7a toward the mouth portion 4 . The recess 7a is made difficult to be closed by the shrink film by the flow groove 7b. And, since the mouth 4 Since the engaging portion 4d is an external thread, the engaging portion 23c of the cap 23 is an internal thread.

The pinch-off part 7d of the bottom part 7c is provided with the external air introduction hole 15a of the same structure as 1st Embodiment. The external air introduction hole 15a is formed by, for example, cracking of the casing 11 .

Even in such an aspect, the outside air can be reliably introduced into the intermediate space 21 while preventing the intrusion of water into the intermediate space 21 by the same operation as that of the first embodiment.

2-3． third embodiment

A laminated peeling container according to a third embodiment of the second aspect of the present invention will be described with reference to FIG. 20 . This embodiment is similar to the second embodiment, and the difference in the position of the external air introduction hole 15a of the bottom part 7c is a main difference. Hereinafter, the difference will be mainly explained.

In this embodiment, the outer air introduction hole 15a is formed by perforating the outer shell 11 in the bottom portion 7c. The external air introduction hole 15a is provided at a position adjacent to the ground contact surface 7e when the container main body 2 is erected. The bottom portion 7c gradually becomes lower from the pinch-off portion 7d toward the ground plane 7e.

According to such a structure, even when water enters into the intermediate space 21 through the external air introduction hole 15b, it can be drained rapidly from the external air introduction hole 15a.

It should be noted that the outside air introduction hole 15a may also be provided on the ground surface 7e, but at this time, when the container main body 2 is erected, the outside air introduction hole 15a may be closed, so it is preferable to place the outside air introduction hole 15a is provided adjacent to the ground plane 7e.

In addition, in order to allow quicker drainage, an inclined surface inclined so as to collect water toward the outside air introduction hole 15a may be provided on the bottom portion 7c.

1‧‧‧Laminated peel-off container

2‧‧‧Container body

7a‧‧‧Concave

50‧‧‧pump

Claims (9)

A laminated peel-off container, which has an outer shell and an inner bag, the inner bag shrinks as contents accommodated in the inner bag decrease, and includes a container main body, a protective member, and a pump, wherein the container main body has a mouth, In addition, the end faces of the outer shell and the inner bag are exposed at the front end of the mouth, and the protective member is mounted on the mouth so as to protect the end faces, and the pump includes: a nozzle portion for pressing operation; For the attachment portion of the container main body; and the suction tube inserted into the container main body, the protective member includes an annular end surface covering portion and an annular rib, and the end surface covering portion covers the outer casing and the inner bag. the end surface of the mouth, the ribs are in contact with the inner peripheral surface of the mouth, the end surface covering part has a base and a narrow part, and the narrow part is a part with a width smaller than that of the base. part, and the width between the outer edge of the front end and the outer edge of the end surface covering part is larger than that of the base part. The laminated peel container according to claim 1, wherein the end surface covering portion is configured so as not to protrude from the outer edge of the front end. The laminated peelable container according to claim 2, wherein when the radius of the circumscribed circle of the end surface coating portion is R1 and the radius of the circumscribed circle of the front end is R2, R1/R2<1. The laminated peel container according to claim 1, wherein the upper surface of the end surface coating portion is provided with an annular convex portion. The laminated peel container according to claim 4, wherein a section perpendicular to the circumferential direction of the annular protrusion has a tapered shape. The laminated peel container according to claim 1, wherein the protective member is fitted to the mouth by pressing the rib into the mouth. The laminated peel container according to claim 1, wherein the rib has a constricted portion whose diameter becomes smaller toward a front end of the rib. The laminated peel container according to claim 1, wherein the holding member is made of polyolefin. The laminated peelable container according to any one of Claims 1 to 8, wherein the front end of the mouth is enlarged in diameter, and the outer shell and the inner bag are inclined.

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