Pump-type double container

Abstract

To provide a pump-type double container allowed to inhibit an erroneous ejection of a content remaining in an inner bag upon pulling out the inner bag.SOLUTION: There is provided, according to the present invention, a pump-type double container comprising a container body and a pump. The container body comprises an inner bag and an outer shell arranged in such a manner as to cover the inner bag, and the pump is attached on a mouth of the container body and configured to suck a content in the inner bag into ejection. The inner bag comprises a protrusion part projecting from an opening end of the outer shell, and the protrusion part is provided with a grip having a slip-resisting shape.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pump-type double container. [Background technology]

[0002] Conventionally, a double container having a container body having an outer shell and an inner bag is known. For example, Patent Document 1 discloses a method of manufacturing a container body having an inner bag and an outer shell covering it by biaxially stretching and blow molding a preform formed by covering an inner preform with an outer preform. In the configuration of Patent Document 1, a mouth attachment member attached to the mouth of the container body engages with the inner bag, and the inner bag can be pulled out by rotating the mouth attachment member together with the inner bag. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-26868 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of a pump-type double container in which the mouth-attached member is a pump, if one tries to pull out the inner bag in the same manner as in Patent Document 1, there is a risk that the nozzle of the pump will be unintentionally pressed down, causing the remaining contents to be expelled.

[0005] The present invention has been made in consideration of the above circumstances, and provides a pump-type double container that can prevent the remaining contents in the inner bag from being accidentally discharged when the inner bag is pulled out. [Means for solving the problem]

[0006] According to the present invention, the following inventions are provided. [1] A pump-type double container comprising a container body and a pump, the container body comprising an inner bag and an outer shell arranged to cover the inner bag, the pump being attached to the mouth of the container body and configured to be able to suck up and discharge the contents in the inner bag, the inner bag comprising a protrusion protruding from the open end of the outer shell, and the protrusion being provided with a grip having an anti-slip shape. [2] A container as described in [1], wherein the pump comprises a pump body and a mounting cap, the pump body comprises an insertion portion, a flange portion, a piston portion, and a pump mechanism portion, the insertion portion is inserted into the inner bag, the flange portion abuts against the open end of the inner bag, the pump body is configured to be able to discharge the contents sucked up through the insertion portion from a nozzle provided on the piston portion by sliding the piston portion to operate a pump mechanism in the pump mechanism portion, and the mounting cap comprises an engagement tube portion and a top surface portion, the top surface portion is provided on the top surface of the engagement tube portion, and is configured so that a female screw portion provided on an inner surface of the engagement tube portion and a male screw portion provided on an outer surface of a mouth portion of the outer shell are screwed together. Effect of the Invention

[0007] In the double container of the present invention, a grip having a non-slip shape is provided on the protruding portion of the inner bag, so that after removing the pump from the container body, the grip can be grasped to pull the inner bag out of the container body, and the remaining contents in the inner bag can be prevented from being accidentally discharged when pulling out the inner bag. [Brief description of the drawings]

[0008] [Figure 1] This is a perspective view of a pump-type double container 1 according to one embodiment of the present invention. The dashed and dotted lines in the figure represent the boundary lines at which the curvature of the faces that make up the surface shape changes. The same is true for the other figures. [Diagram 2] FIG. 2 is an exploded perspective view of FIG. 1 (however, the operation unit cover 9d is not shown). [Diagram 3]3 is a view showing a portion near the mouth 5 of the inner bag 4 separated from the container body 2 in FIG. 2. FIG. [Figure 4] 4 is a perspective view of the outer shell 3 of FIG. 3 as seen from a different angle. [Diagram 5] FIG. 2 is a vertical cross-sectional view of the double container 1 in FIG. 1 (however, the operation section cover 9d is not shown, and the pump body 9a is a front view). [Figure 6] 6 is an exploded view of FIG. 5 (however, cap cover 9c and shoulder cover 16 are not shown). [Figure 7] FIG. 2 is a perspective view showing a state in which the inner preform 14 and the outer preform 13 are separated. [Figure 8] FIG. 2 is a perspective view showing a preform 15 formed by covering an inner preform 14 with an outer preform 13. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, embodiments of the present invention will be described. Various features shown in the following embodiments can be combined with each other. Also, each feature can be an invention independently.

[0010] 1. Configuration of pump-type double container 1 <Basic configuration> As shown in FIG. 1, a pump-type double container 1 according to one embodiment of the present invention includes a container body 2 and a pump 9.

[0011] As shown in Figs. 2 and 3, the container body 2 has a mouth portion 5, a trunk portion 6, and a bottom portion 7. The mouth portion 5 is a tubular (preferably cylindrical) portion having an open end 5c. The open end 5c is the open end of the container body 2 and also the open end of the inner bag 4. The mouth portion 5 has an engagement portion 5d to which a pump 9 can be attached. The mouth portion 5 is provided with a flange 5b.

[0012] The body 6 is disposed adjacent to the mouth 5 on the side farther from the open end 5c than the mouth 5. The body 6 has a larger outer diameter (in this specification, "outer diameter" means a circle-equivalent diameter when the cross section is not circular) than the mouth 5. The body 6 is cylindrical, and the bottom 7 is provided at the lower end of the body 6 and closes the lower end of the body 6. The body 6 has a shoulder 6b whose outer diameter increases with increasing distance from the mouth 5. The body 6 also has a body main body 6c on the bottom 7 side of the shoulder 6b. The body main body 6c has, for example, a shape in which the outer diameter is approximately constant toward the bottom 7, or a shape in which the diameter decreases toward the bottom 7. The cross section of the body main body 6c is a square shape with rounded corners. Furthermore, the angle of the shoulder 6b with respect to the horizontal plane is preferably 1 to 30 degrees (6 degrees in this embodiment), specifically, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, or 30 degrees, or may be in a range between any two of the numerical values ​​exemplified here.

[0013] A shoulder cover 16 is provided on the shoulder 6b. An edge 16a1 of an opening 16a of the shoulder cover 16 engages with the flange 5b to restrict axial movement. A recess (not shown) provided on the underside of the shoulder cover 16 engages with a protrusion 6b1 provided on the shoulder 6b to restrict circumferential movement of the shoulder cover 16. The mouth 5 is inserted into the opening 16a.

[0014] 3, the container body 2 includes an inner bag 4 and an outer shell 3 arranged to cover the inner bag 4. The inner bag 4 has an inner bag body 4d other than the protruding portion 4c housed within the outer shell 3. In the following description, the portions of the inner bag 4 that correspond to the mouth 5, body 6, and bottom 7 of the container body 2 will be referred to as the mouth 5, body 6, and bottom 7 of the inner bag 4, respectively. The same applies to the outer shell 3.

[0015] At the mouth 5 of the container body 2, it is easier to rotate the inner bag 4 relative to the outer shell 3 than at the bottom 7. Therefore, when the inner bag 4 is rotated relative to the outer shell 3 at the mouth 5, the inner bag 4 is twisted and reduced in diameter, making it easier to pull out of the container body 2.

[0016] 5, an outside air introduction hole 17 is provided in the bottom 7 of the outer shell 3. When the inner bag 4 contracts as the contents in the inner bag 4 are discharged, outside air is introduced into the outer shell 3 through the outside air introduction hole 17, thereby preventing the intermediate space between the outer shell 3 and the inner bag 4 from being decompressed. An example of the contents is cosmetics.

[0017] <Detailed structure of outer shell 3 and inner bag 4> 2 to 6, inner bag 4 has a protruding portion 4c protruding from open end 3a of outer shell 3. Protruding portion 4c has a gripping portion 4c11 and a reduced diameter portion 4c12.

[0018] Since the outer diameter of the gripping portion 4c11 is larger than the inner diameter of the outer shell 3 at the opening end 3a, the lower surface of the gripping portion 4c11 abuts against the opening end 3a, thereby preventing the inner bag 4 from falling off into the outer shell 3. As shown in FIG. 6, the inner peripheral surface of the gripping portion 4c11 is provided with a recess 4c13. The outer peripheral surface of the gripping portion 4c11 is provided with a non-slip shape for facilitating gripping the gripping portion 4c11 and rotating the inner bag 4. In this embodiment, the non-slip shape is an uneven shape (e.g., a knurled shape) in which convex portions and concave portions are alternately arranged in the circumferential direction. In another embodiment, the non-slip shape may be, for example, a shape in which the outer peripheral surface of the gripping portion 4c11 is roughened. The gripping portion 4c11 is preferably shaped (preferably curved) so as to decrease in diameter toward the opening end 5c. In this case, interference between the gripping portion 4c11 and the mounting cap 9b (shown in FIG. 5) of the pump 9 is prevented. The reduced diameter portion 4c12 is provided closer to the opening end 5c than the gripping portion 4c11. The reduced diameter portion 4c12 is preferably cylindrical.

[0019] 3, an engaging protrusion 4h is provided on the outer circumferential surface of the inner bag 4 (more specifically, the inner bag main body 4d). The lower surface of the engaging protrusion 4h is inclined counterclockwise when viewed from the opening end 5c side of the mouth portion 5 so as to approach the opening end 5c.

[0020] As shown in FIG. 4, a cam rail 3l is provided on the inner peripheral surface of the outer shell 3. The upper surface of the cam rail 3l is inclined so as to approach the opening end 3a as it progresses counterclockwise when viewed from the opening end 3a side. A through hole 3n may be provided on the inner peripheral surface of the outer shell 3. The through hole 3n can be provided so that the lower surface of the through hole 3n is continuous with the upper surface of the cam rail 3l. The through hole 3n can be used as an outside air introduction hole for introducing outside air into the intermediate space between the outer shell 3 and the inner bag 4.

[0021] When the mouth 5 of the inner bag 4 is rotated counterclockwise, the lower surface of the engaging protrusion 4h moves along the upper surface of the cam rail 3l. The engaging protrusion 4h and the cam rail 3l form a cam mechanism 31. As the inner bag 4 rotates, the action of the cam mechanism 31 causes the inner bag 4 to move in a direction to come out of the container body 2. At this time, the inner bag 4 is twisted and reduced in diameter.

[0022] <Pump 9> 2, 5 and 6, the pump 9 is attached to the mouth 5 of the container body 2, and is configured to be able to suck up and discharge the contents in the inner bag 4. As shown in Fig. 6, in this embodiment, the pump 9 includes a pump body 9a and an attachment cap 9b.

[0023] The pump body 9a includes an insertion portion 9a1, a flange portion 9a2, a piston portion 9a3, and a pump mechanism portion 9a4.

[0024] The insertion portion 9a1 is inserted into the inner bag 4. A suction hole 9a5 is provided in the insertion portion 9a1, and the contents can be sucked through the suction hole 9a5. An inner ring 9a6 is provided in the insertion portion 9a1. The inner bag 4 is sealed by bringing the inner ring 9a6 into close contact with the inner surface of the mouth portion 5 (more specifically, the reduced diameter portion 4c12) of the inner bag 4.

[0025] In the double container 1 of this embodiment, the inner bag 4 is configured to contract as the contents are discharged, so that the liquid level of the contents hardly changes even if the contents decrease. Therefore, even if the suction hole 9a5 is located away from the bottom 7, the suction hole 9a5 can always maintain contact with the contents, allowing the contents to be discharged efficiently. On the other hand, the present invention can also be applied to a double container configured such that air enters the inner bag 4 as the contents are discharged, so that the inner bag 4 does not contract. In that case, the liquid level of the contents decreases as the contents are discharged, so the suction hole 9a5 can be located close to the bottom 7.

[0026] Flange portion 9a2 is a portion having a larger diameter than insertion portion 9a1, and abuts against open end 5c of inner bag 4. This prevents pump body 9a from falling off into inner bag 4.

[0027] The pump body 9a is configured so that the contents sucked up through the insertion portion 9a1 can be discharged from a nozzle 9a7 provided on the piston portion 9a3 by sliding the piston portion 9a3 and activating the pump mechanism in the pump mechanism portion 9a4.

[0028] The mounting cap 9b includes an engagement cylinder portion 9b1 and a top surface portion 9b2. The top surface portion 9b2 is provided on the top surface of the engagement cylinder portion 9b1. A top surface cylinder portion 9b3 is provided on the top surface portion 9b2. The piston portion 9a3 is configured to be slidable within the top surface cylinder portion 9b3.

[0029] The mounting cap 9b is engaged with the mouth 5 of the outer shell 3 such that the top surface 9b2 presses the flange 9a2 against the opening end 5c. More specifically, a female screw 9b4 is provided on the inner peripheral surface of the engagement tube 9b1, and a male screw 5d1 is provided on the outer peripheral surface of the mouth 5 of the outer shell 3. By screwing the female screw 9b4 and the male screw 5d1 together, the mounting cap 9b can be attached to the mouth 5 of the outer shell 3 and the flange 9a2 can be pressed against the opening end 5c by the top surface 9b2. It is preferable that the mounting cap 9b is not engaged with the inner bag 4.

[0030] The pump 9 may include a cap cover 9c that covers the mounting cap 9b. In this case, the aesthetic appearance of the pump 9 can be improved. The pump 9 may also include an operation unit cover 9d that covers the piston portion 9a3 and the nozzle 9a7. By attaching the operation unit cover 9d during transportation of the double container 1, it is possible to prevent the piston portion 9a3 from being unintentionally pressed down and the contents from being discharged. The cap cover 9c and the operation unit cover 9d can be omitted if they are not required.

[0031] <Removing inner bag 4> First, the mounting cap 9b is rotated relative to the outer shell 3 in the loosening direction to release the screw engagement between the mounting cap 9b and the outer shell 3, and then the pump body 9a is pulled to remove the insertion portion 9a1 from the inner bag 4, thereby removing the pump 9 from the container body 2.

[0032] After removing the pump 9 from the container body 2, by gripping the gripping portion 4c11 of the inner bag 4 and rotating the inner bag 4 relative to the outer shell 3, the inner bag 4 can be moved in a direction to come out of the container body 2 (i.e., the inner bag 4 can be lifted up) by the action of the cam mechanism 31. After the inner bag 4 has been lifted up, the inner bag 4 can be pulled out of the container body 2 by gripping the gripping portion 4c11 and pulling the inner bag 4.

[0033] After removing the pump 9 from the container body 2, the contents remaining in the inner bag 4 (e.g., cosmetics) can be expelled by tilting or compressing the container body 2. After the inner bag 4 is pulled out of the container body 2, the contents in the inner bag 4 can be further expelled by squeezing the inner bag 4. By performing such an operation, the amount of remaining contents in the inner bag 4 can be reduced. Furthermore, when the contents are expensive items such as cosmetics, the significance of reducing the amount of remaining contents in the inner bag 4 is particularly significant.

[0034] 2. Manufacturing method of double container 1 The container body 2 can be manufactured by biaxially stretching and blow molding a preform 15 shown in Fig. 8. In addition, the double container 1 can be manufactured by attaching necessary members such as a pump 9 to the container body 2.

[0035] <Configuration of inner preform 14, outer preform 13, and preform 15> As shown in FIG. 7, the preform 15 includes an inner preform 14 which becomes the inner bag 4 and an outer preform 13 which becomes the outer shell 3 .

[0036] As shown in Fig. 7, the inner preform 14 is a bottomed tubular member, and includes an opening 14a, a body 14b, and a bottom 14c. The opening 14a is provided with a protruding portion 14d and an engaging protruding portion 14h. The protruding portion 14d and the engaging protruding portion 14h become the protruding portion 4c and the engaging protruding portion 4h, respectively, after molding. The bottom 14c is provided to close the lower end of the body 14b.

[0037] 7, the outer preform 13 is a bottomed tubular member, and includes an opening 13a, a body 13b, and a bottom 13c. The bottom 13c is provided to close the lower end of the body 13b. The bottom 13c may have a through hole that serves as an outside air introduction hole 17.

[0038] 8, the preform 15 can be formed by covering the inner preform 14 with the outer preform 13. In the preform 15, the mouth portion 14a faces the mouth portion 13a, and the body portion 14b faces the body portion 13b.

[0039] The mouth portions 13a and 14a become the mouth portion 15a of the preform 15, the body portions 13b and 14b become the body portion 15b of the preform 15, and the bottom portions 13c and 14c become the bottom portion 15c of the preform 15. The body portion 15b and the bottom portion 15c are mainly stretched in the biaxial stretch blow molding. The mouth portion 15a is hardly deformed during molding and becomes the mouth portion 5 of the container body 2. The above-mentioned contents regarding the configuration included in the mouth portion 5 can also be applied to the configuration included in the mouth portion 15a as long as it is not contrary to the spirit thereof.

[0040] <Materials and manufacturing methods of inner preform 14, outer preform 13, and preform 15> The inner preform 14 and the outer preform 13 can be formed by direct blow molding or injection molding using a thermoplastic resin such as polyester (eg, PET) or polyolefin (eg, polypropylene, polyethylene).

[0041] The outer preform 13 is preferably formed by injection molding. The inner preform 14 is preferably formed by direct blow molding using a molten cylindrical parison. By forming the inner preform 14 by direct blow molding, a recess 4c13 is formed in the gripping portion 4c11. The inner preform 14 is preferably of a multi-layer structure. [Explanation of symbols]

[0042] 1: Pump-type double container 2: Container body 3: Outer shell 3a: Open end 3l: Cam rail 4: Inner bag 4c:Protrusion 4c11: Grip part 4c12: Reduced diameter part 4c13: Recess 4d: Inner bag body 4h: Engagement protrusion 5: Mouth 5b: Flange 5c: Open end 5d: Engagement part 5d1: Male thread 6: Torso 6b:Shoulder 6b1: Protrusion 6c: Body 7: Bottom 9: Pump 9a: Pump body 9a1: Insertion part 9a2: Flange part 9a3: Piston section 9a4: Pump mechanism 9a5: Suction hole 9a6: Inner ring 9a7 :Nozzle 9b: Mounting cap 9b1: Engagement cylinder part 9b2:Top part 9b3: Top cylinder part 9b4: Female thread 9c: Cap cover 9d: Operation unit cover 13: Outer preform 13a: Mouth 13b: Torso 13c: Bottom 14: Inner preform 14a: Mouth 14b: Torso 14c: Bottom 14d:Protrusion 14h: Engagement protrusion 15: Preform 15a: Mouth 15b: Torso 15c: bottom 16: Shoulder cover 16a: Opening 16a1 : Edge 17: Outside air intake 31: Cam mechanism

Claims

1. A pump-type double container comprising a container body and a pump, The container body includes an inner bag and an outer shell arranged to cover the inner bag. The pump is attached to the mouth of the container body and is configured to be able to suck and discharge the contents in the inner bag, The inner bag has a protrusion protruding from an open end of the outer shell, The container, wherein the protrusion is provided with a grip having an anti-slip shape.

2. 2. The container of claim 1, The pump includes a pump body and a mounting cap. The pump body includes an insertion portion, a flange portion, a piston portion, and a pump mechanism portion. The insertion portion is inserted into the inner bag, The flange portion abuts against an open end of the inner bag, the pump body is configured to be able to discharge the content sucked up through the insertion part from a nozzle provided in the piston part by sliding the piston part to operate a pump mechanism in the pump mechanism part, The mounting cap includes an engagement tube portion and a top surface portion, The top surface portion is provided on a top surface of the engagement tube portion, A container configured so that a female thread portion provided on an inner peripheral surface of the engagement cylindrical portion and a male thread portion provided on an outer peripheral surface of the mouth portion of the outer shell are screwed together.

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