JP6942419B2 - Refill container and its manufacturing method - Google Patents

Description

The present invention relates to a refill container used for accommodating contents for refilling into another container and a method for producing the same.

For products in which the contents such as shampoo, conditioner, liquid detergent, deodorant and disinfectant or cosmetics are contained in a container, after the contents are used up, new contents are added from a separately commercially available refill container. I try to refill things and reuse the original container.

As a refill container used for the above-mentioned refilling of contents, a bottle-shaped container having a tubular mouth portion and a bottomed tubular body portion connected to the mouth portion is known (for example). See Patent Document 1). Such a refill container is formed, for example, by biaxially stretching blow molding a preform formed by injection molding a synthetic resin material.

On the other hand, as the refill container as described above, the amount of synthetic resin material used is reduced to reduce the manufacturing cost, and the contents can be refilled and emptied, and then rolled into small pieces and discarded. Therefore, a structure in which the wall thickness of the body is thinned is also known. In this case, the contents from the refill container are refilled by engaging the mouth of the refill container or the dispenser attached to the mouth with the mouth of the original container, and then refilling the container. Invert the orientation of these containers so that the container is in an inverted position, and while holding the mouth of the refill container by hand, crush the body and pour out the contents toward the container to be refilled. It is generally done by things.

JP-A-2015-224078

However, in the configuration in which the body is thinned like the conventional refill container, the rigidity of the part other than the mouth is low, so that it is difficult to hold the mouth part by hand. Therefore, the container is in an inverted posture. There is a problem that the work of crushing the body and refilling the contents becomes complicated.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a refill container capable of easily performing a refilling operation of contents and a method for manufacturing the same.

The refill container of the present invention is a refill container used for storing the contents to be refilled into another container, and is an annular shape integrally connected to a tubular mouth portion and the lower end of the mouth portion. A tubular grip wall that is integrally connected to the lower surface of the flange wall and projects downward from the lower surface, and is formed thinner than the flange wall and the grip wall, and is formed to be thinner than the flange wall and the mouth. the lower end parts provided lined integrally have a, a bottomed cylindrical body portion projecting downward from the lower end of the gripping wall extends along the inner surface of the flange wall and the holding wall, the flange It is characterized in that a ring body is provided on the outside of the wall so as to be formed in an annular shape surrounding the outer periphery of the flange wall and integrally connected to the flange wall via a hinge.

In the refill container of the present invention, it is preferable that the gripping wall is provided inside the outer peripheral edge of the flange wall in the above configuration.

In the refill container of the present invention, in the above configuration, it is preferable that the flange wall and the ring body are connected to each other by at least one weakened portion at a portion different from the hinge.

In the above configuration, the refill container of the present invention preferably has a shape in which the bottom portion of the body portion is recessed inward, leaving a peripheral portion.

In the method for manufacturing a refill container of the present invention, a synthetic resin material is injection-molded, and the tubular mouth portion, the annular flange wall integrally connected to the lower end of the mouth portion, and the lower surface of the flange wall are integrated. An injection molding step of forming a preform having a tubular gripping wall that is provided in series with the lower surface and projects downward from the lower surface, and a body portion precursor portion that is integrally connected to the lower end of the mouth portion. A refill container used for accommodating contents for refilling into another container by a blow molding step of biaxially stretching blow molding the body precursor portion of the preform, which is tubular. A tubular grip wall that is integrally connected to the lower surface of the flange wall and projects downward from the lower surface, and an annular flange wall that is integrally connected to the lower end of the mouth portion. It is formed thinner than the flange wall and the gripping wall, is integrally connected to the lower end of the mouth portion, extends along the inner surface of the flange wall and the gripping wall, and projects downward from the lower end of the gripping wall. It is characterized in that a refill container having a bottomed tubular body portion is manufactured.

In the above configuration, the method for manufacturing a refill container of the present invention is formed on the outside of the flange wall in an annular shape surrounding the outer periphery of the flange wall in the injection molding step, and is formed on the flange wall via a hinge. It is preferable to form a ring body that is integrally connected.

In the above configuration, the method for manufacturing a refill container of the present invention forms at least one weakened portion that connects the flange wall and the ring body to each other at a portion different from the hinge in the injection molding step. Is preferable.

In the method for manufacturing a refill container of the present invention, in the above configuration, after the blow molding step, the bottom portion of the body portion is inverted toward the inside of the body portion, and the bottom portion of the body portion is formed. It is preferable that the shape is recessed inward while leaving the peripheral portion.

According to the present invention, it is possible to provide a refill container and a method for manufacturing the same, which can easily perform a refilling operation of the contents.

It is sectional drawing in front view of the refill container which is one Embodiment of this invention. It is a top view of the refill container shown in FIG. It is sectional drawing which shows the state that the contents are refilled by the refill container shown in FIG. It is sectional drawing which shows the state which pulled up the ring body from a flange wall. It is sectional drawing which shows the state which held the body part in a rounded shape by a ring body. It is sectional drawing of the preform used in the manufacturing method of the refill container which is one Embodiment of this invention. It is sectional drawing which shows the container body formed by biaxial stretching blow molding of the preform shown in FIG.

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

The refill container 1 according to the embodiment of the present invention shown in FIGS. 1 and 2 has contents for refilling into another container such as shampoo, conditioner, liquid detergent, deodorant and disinfectant, and cosmetics. It is used for the purpose of accommodating the object M.

In the present specification and claims, the vertical direction of the refill container 1 means the vertical direction in FIG. 1.

For example, the refill container 1 made of synthetic resin such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) has a mouth portion 2, a flange wall 3, a grip wall 4, a ring body 5, and a body portion 6. Has a structure integrally formed of the above synthetic resin material, and has a substantially bottle shape as a whole.

The mouth portion 2 is formed in a cylindrical shape, and the upper end opening thereof is a spout 2a of the content M. A male screw 2b is integrally provided on the outer peripheral surface of the mouth portion 2, and a cap 7 for closing the spout 2a of the mouth portion 2 is screwed to the male screw 2b and attached to the mouth portion 2. Further, the mouth portion 2 is integrally provided with a neck ring 2c located below the male screw 2b.

The flange wall 3 is integrally connected to the lower end of the mouth portion 2, and extends outward in the radial direction on the entire circumference of the lower end of the mouth portion 2 to form an annular shape. The flange wall 3 has a flat plate shape on the upper surface and the lower surface, but the portion connected to the mouth portion 2 on the upper surface has a concavely curved shape for reinforcement.

The gripping wall 4 has a cylindrical shape with a constant inner diameter, and at the upper end thereof, is integrally connected to the lower surface of the flange wall 3 and projects downward from the lower surface. In the present embodiment, the outer diameter of the grip wall 4 is smaller than the outer diameter of the flange wall 3, that is, the grip wall 4 is provided radially inside the outer peripheral edge of the flange wall 3. The portion of the outer peripheral surface of the grip wall 4 that is connected to the lower surface of the flange wall 3 is a curved portion 4a that is curved in a concave shape, and when the outer peripheral surface of the grip wall 4 is gripped by hand, the finger hits the curved portion 4a and locks. It is supposed to be done.

The mouth portion 2, the flange wall 3, and the grip wall 4 have predetermined rigidity so as not to be easily deformed even if the grip wall 4 is gripped by hand.

The ring body 5 has a plate shape having the same thickness as the flange wall 3, and has an annular shape whose inner diameter is larger than the outer diameter of the flange wall 3, and the outer circumference of the flange wall 3 is outside the flange wall 3. It is arranged so as to surround. The ring body 5 is integrally connected to the flange wall 3 via a hinge 8 and is rotatable in the vertical direction around the hinge 8.

Further, seven weakening portions 9 are provided between the flange wall 3 and the ring body 5 so as to be arranged at equal intervals in the circumferential direction. That is, the flange wall 3 and the ring body 5 are connected to each other by seven weakening portions 9 at a portion different from the hinge 8. These weakened portions 9 are small pieces that are sufficiently thinner than the flange wall 3 and the ring body 5, and are sufficiently narrower in the circumferential direction than the hinge 8, respectively. For example, if the ring body 5 is rotated in the vertical direction around the hinge 8 by manually pulling up the portion of the ring body 5 opposite to the hinge 8 with the axial center of the ring body 5 in between, each weakened portion 9 can be easily removed. Breaks into.

The body portion 6 is formed to be thinner than the flange wall 3 and the gripping wall 4, and is in a branched state from the flange wall 3 and is integrally connected to the lower end of the mouth portion 2. The body portion 6 has a bottomed cylindrical shape, extends from the lower end of the mouth portion 2 along the inner surface, that is, the lower surface of the flange wall 3, and extends downward along the inner surface of the grip wall 4, and extends downward from the grip wall. It protrudes downward from the lower end of 4. The inside of the body portion 6 is a storage space S for the contents M.

The body 6 is formed to be thin and has a flexible bag shape, and can be easily crushed by hand. For example, the thickness of the body portion 6 is about 0.1 to 0.5 mm. By crushing the body portion 6 by hand with the cap 7 removed, the contents M contained in the accommodation space S can be ejected to the outside from the injection port 2a of the mouth portion 2. Further, after most of the contents M are poured out from the accommodation space S, the body portion 6 can be easily rolled by hand from the side of the bottom portion toward the side of the mouth portion 2.

The bottom portion of the body portion 6 has a shape in which the peripheral portion 6a is left and the inner portion of the peripheral edge portion 6a is a recessed portion 6b. The peripheral edge portion 6a has a rib shape extending in the circumferential direction between the side surface of the body portion 6 and the inner peripheral surface of the recess 6b, and has higher rigidity than the other portions of the body portion 6. Further, the peripheral edge portion 6a slightly projects outward in the radial direction from the side surface of the body portion 6. As a result, the refill container 1 can stand on its own in a stable upright posture with the peripheral edge portion 6a as the ground contact portion.

FIG. 3 is a cross-sectional view showing how the contents are refilled by the refill container shown in FIG. 1, FIG. 4 is a cross-sectional view showing a state in which the ring body is pulled up from the flange wall, and FIG. 5 is a cross-sectional view showing a state in which the ring body is pulled up from the flange wall. It is sectional drawing which shows the state which held the body part in a rounded shape by. In FIGS. 3 to 5, the above-mentioned members are designated by the same reference numerals.

Next, a procedure for refilling the content M from the refill container 1 having the above configuration to another container 10 will be described with reference to FIGS. 3 to 5.

First, the operator removes the cap 7 from the mouth portion 2, engages the mouth portion 2 with the mouth portion 11 of the other container 10, and then refills the refill container 1 so as to be in an inverted position. Reverse the orientation of 1 and the other container 10. Then, as shown in FIG. 3, the body 6 of the refill container 1 in the inverted posture is crushed by hand, and the contents M stored in the storage space S are removed from the spout 2a of the mouth 2. The contents M are refilled by pouring out toward the inside of the container 10.

Here, since the tubular gripping wall 4 having a predetermined rigidity is provided at the mouth portion of the refill container 1, the operator can slide his / her hand by gripping the gripping wall 4 by hand. It is possible to easily and surely hold the refill container 1 in the inverted position. Therefore, the operator grips the gripping wall 4 by hand to securely hold the mouth portion 2 of the refill container 1 in the inverted posture so as not to come off from the mouth portion 11 of the other container 10, and the body portion 6 Can be crushed, so that the refilling work of the content M becomes easy. Further, at this time, since the body portion 6 is thin and can be easily crushed, the refilling work of the content M is even easier.

As described above, according to the refill container 1 of the present embodiment, the refill container 1 in the inverted posture can be easily and surely held by the gripping wall 4 even if the body portion 6 is easily crushed. It is possible to easily perform the refilling work of the content M.

Further, in the refill container 1 of the present embodiment, since the gripping wall 4 is provided inside the outer peripheral edge of the flange wall 3, the finger gripping the gripping wall 4 is locked to the lower surface of the flange wall 3. Therefore, the refill container 1 in the inverted posture can be held more reliably. Further, by pressing the mouth portion 2 against the mouth portion 11 of the other container 10 with a finger locked to the flange wall 3, the mouth portion 2 of the refill container 1 can be more reliably pressed against the mouth portion 11 of the other container 10. It can be held so that it does not come off. Therefore, the refilling operation of the content M can be performed more easily.

After the refilling of the content M is completed, as shown in FIG. 4, the ring body 5 is pulled up by hand while holding the gripping wall 4 and rotated upward around the hinge 8 to weaken the weakened portion 9. To break. Next, as shown in FIG. 5, the body portion 6 is rounded from the bottom portion side toward the mouth portion 2 side to the vicinity of the gripping wall 4, and then the ring body 5 is centered on the hinge 8. Rotate downward to arrange the rolled body 6 inside the ring body 5. As a result, the body portion 6 is held in a shape rounded by the ring body 5.

As described above, in the refill container 1 of the present embodiment, since the ring body 5 is provided on the outside of the flange wall 3, the body 6 of the refill container 1 can be rolled up by a simple operation. The refill container 1 after use can be disposed of in a reduced volume state so that the refill container 1 can be held in a reduced volume state.

Further, in the refill container 1 of the present embodiment, before using the ring body 5, the ring body 5 is connected to the flange wall 3 by the weakening portion 9 and held non-rotatably on the flange wall 3. Therefore, it is possible to prevent the ring body 5 from getting in the way during the refilling work.

In the state shown in FIGS. 4 and 5, the cap 7 may not be attached to the mouth portion 2.

FIG. 6 is a cross-sectional view of a preform used in the method for manufacturing a refill container according to an embodiment of the present invention, and FIG. 7 is formed by biaxially stretching blow molding the preform shown in FIG. It is sectional drawing which shows the container body. In addition, in FIGS. 6 and 7, the same reference numerals are given to the members corresponding to the above-mentioned members.

The refill container 1 having the above configuration can be manufactured by the method for manufacturing a refill container according to the embodiment of the present invention. The manufacturing method includes an injection molding step and a blow molding step.

In the injection molding step, a synthetic resin material such as polyethylene (PE), polypropylene (PP), or polyethylene terephthalate (PET) is injection-molded to form the preform 20 having the shape shown in FIG. The preform 20 is provided integrally with the tubular mouth portion 2, the annular flange wall 3 integrally connected to the lower end of the mouth portion 2, and the lower surface of the flange wall 3, and is provided downward from the lower surface of the flange wall 3. A tubular gripping wall 4 projecting toward the flange wall 4, and a ring body 5 formed on the outside of the flange wall 3 in an annular shape surrounding the outer periphery of the flange wall 3 and integrally connected to the flange wall 3 via the hinge 8. It has seven weakening portions 9 that connect the flange wall 3 and the ring body 5 to each other at a portion different from the hinge 8, and a body portion precursor portion 21 that is integrally provided at the lower end of the mouth portion 2.

The mouth portion 2, the flange wall 3, the gripping wall 4, the ring body 5, the hinge 8 and the weakened portion 9 of the preform 20 are the mouth portion 2, the flange wall 3, the gripping wall 4, and the ring body 5 of the refill container 1. It has the same shape as the hinge 8 and the weakened portion 9. That is, the mouth portion 2, the flange wall 3, the gripping wall 4, the ring body 5, the hinge 8 and the weakened portion 9 of the refill container 1 are the mouth portion 2 of the preform 20 formed by injection molding a synthetic resin material. , Flange wall 3, gripping wall 4, ring body 5, hinge 8 and weakened portion 9 as they are, which is an injection-molded product.

On the other hand, the body portion precursor portion 21 is thicker than the body portion 6 of the refill container 1, is formed in a substantially test tube shape, and is integrally connected to the lower end of the mouth portion 2.

In the blow molding step, the preform 20 is set in a mold (not shown), and the body precursor portion 21 is biaxially stretched and blow molded into a shape along the cavity of the mold. At this time, the mouth portion 2 is arranged on the outside of the mold, and the flange wall 3, the gripping wall 4, and the ring body 5 are all arranged in close contact with the inner surface of the mold. 3. The gripping wall 4 and the ring body 5 are not stretched, and only the body precursor portion 21 is biaxially stretched in the vertical direction and the horizontal direction. The preform 20 is formed into the container body 22 shown in FIG. 7 by biaxially stretching blow molding the body portion precursor portion 21.

The container body 22 has a mouth portion 2, a flange wall 3, a gripping wall 4, a ring body 5, a hinge 8 and a weakened portion 9 having the same shape as the refill container 1, but the bottom portion of the body portion 6 is a peripheral edge. It does not have a portion 6a and a recess 6b, but has a shape having a bulging portion 23 protruding downward. The bulging portion 23 includes an overhanging portion 23a that extends downward from the side surface of the body portion 6 and projects outward in the radial direction, and a reduced diameter portion 23b that reduces the diameter downward from the lower end of the overhanging portion 23a in a truncated cone shape. It has a flat bottom surface portion 23c connected to the lower end of the diameter reduction portion 23b.

After the blow molding step, the bottom surface portion 23c is pushed upward toward the inside of the body portion 6, and the bottom portion of the body portion 6 is placed so that the diameter-reduced portion 23b faces the inside of the overhanging portion 23a at intervals. By inverting the inside of the portion 6, the bottom portion of the body portion 6 can be formed into a shape having a recess 6b recessed inward, leaving the peripheral edge portion 6a.

The refill container 1 can be manufactured by the above steps. The refill container 1 after production is filled with the content M from the mouth portion 2, and the mouth portion 2 is closed by the cap 7.

It goes without saying that the present invention is not limited to the above-described embodiment and can be variously modified without departing from the gist thereof.

For example, in the above-described embodiment, the flange wall 3, the gripping wall 4, and the ring body 5 are each formed in a circular or cylindrical shape, but the present invention is not limited to this, and the flange wall 3, the gripping wall 4, and the ring body 5 may be formed in a square shape or a square cylinder shape, respectively. ..

Further, the content M contained in the refill container 1 is not limited to the one illustrated above, and can be variously changed.

1 Refill container 2 Mouth 2a Outlet 2b Male screw 2c Neck ring 3 Flanged wall 4 Grip wall 4a Curved part 5 Ring body 6 Body 6a Peripheral part 6b Recessed 7 Cap 8 Hinge 9 Weakened part 10 Container 11 Mouth 20 Reform 21 Body precursor 22 Container body 23 Bottom bulge 23a Overhang 23b Reduced diameter 23c Bottom M Contents S Storage space

Claims (8)

A refill container used for storing the contents to be refilled into another container.
Cylindrical mouth and
An annular flange wall integrally connected to the lower end of the mouth
A cylindrical grip wall that is integrally connected to the lower surface of the flange wall and projects downward from the lower surface.
It is formed thinner than the flange wall and the grip wall, is integrally connected to the lower end of the mouth portion, extends along the inner surface of the flange wall and the grip wall, and projects downward from the lower end of the grip wall. a bottomed cylindrical barrel which, was closed,
A refill container provided on the outside of the flange wall with a ring body formed in an annular shape surrounding the outer periphery of the flange wall and integrally connected to the flange wall via a hinge. The refill container according to claim 1, wherein the gripping wall is provided inside the outer peripheral edge of the flange wall. The refill container according to claim 1 or 2 , wherein the flange wall and the ring body are connected to each other by at least one weakening portion at a portion different from the hinge. The refill container according to any one of claims 1 to 3 , wherein the bottom portion of the body portion has a shape recessed inward leaving a peripheral portion. A synthetic resin material is injection-molded to provide a tubular mouth portion, an annular flange wall integrally connected to the lower end of the mouth portion, and an annular flange wall integrally connected to the lower surface of the flange wall, and directed downward from the lower surface. An injection molding step of forming a preform having a tubular gripping wall that protrudes vertically and a body portion precursor portion that is integrally provided at the lower end of the mouth portion.
By a blow molding step of biaxially stretching blow molding the body precursor portion of the preform.
A refill container used for storing the contents to be refilled into another container.
Cylindrical mouth and
An annular flange wall integrally connected to the lower end of the mouth
A cylindrical grip wall that is integrally connected to the lower surface of the flange wall and projects downward from the lower surface.
It is formed thinner than the flange wall and the grip wall, is integrally provided at the lower end of the mouth portion, extends along the inner surface of the flange wall and the grip wall, and projects downward from the lower end of the grip wall. A method for manufacturing a refill container, which comprises manufacturing a refill container having a bottomed tubular body portion and the like. The packing according to claim 5 , wherein in the injection molding step, a ring body is formed on the outside of the flange wall in an annular shape surrounding the outer periphery of the flange wall and integrally connected to the flange wall via a hinge. Manufacturing method of replacement container. The method for manufacturing a refill container according to claim 6 , wherein in the injection molding step, at least one weakened portion that connects the flange wall and the ring body to each other at a portion different from the hinge is formed. After the blow molding step, the bottom portion of the barrel is reversed toward the inner side of the body portion, the bottom portion of the body portion, and recessed inward, leaving the peripheral portion, claim 5 The method for manufacturing a refill container according to any one of 7 to 7.

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