Discharge container

Abstract

To provide a discharge container and a preform assembly that can effectively suppress collapse of an outer layer body at a shoulder and suppress an increase in the number of components and work man-hours.SOLUTION: A discharge container 100 has: a double-layered container body 1 having an outer layer body 2 having a cylindrical mouth part 2a, a shoulder part 2b expanding from a lower end of the mouth part 2a, and a body 2c connected to a lower part of the shoulder part 2b, and an inner layer body 3 peelably laminated on an inner surface of the outer layer body 2; and a discharger 4 having a discharge port 7d for discharging contents and attached to the mouth part 2a. The outer layer body 2 has a shoulder part through-hole 2f penetrating the outer layer body 2 at the shoulder part 2b. The discharger 4 has a projection 8d that is inserted into the shoulder part through-hole 2f when attached to the mouth part 2a and has a tip protruding from an inner surface of the shoulder part 2b.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a discharge container including a container body having a double structure with an outer layer and an inner layer, and a discharger attached to the mouth of the container body. In a bowl It relates thereto.

Background Art

[0002] Conventionally, as a container for containing cosmetics such as lotion, shampoo, conditioner, liquid soap, food seasonings, drugs, etc. as contents, it has a container body with a double structure having an outer layer and an inner layer laminated on the inner surface of the outer layer detachably, and a discharger attached to the mouth of the container body. A discharge container for discharging the contents from a discharge port provided in the discharger is known. For example, Patent Documents 1 and 2 disclose a discharge container provided with a discharger having a check valve provided in a discharge cap attached to the mouth. Further, Patent Document 3 discloses a discharge container provided with a discharger in which a pump is driven by pressing on a nozzle head.

[0003] Such a discharge container is configured such that when the contents contained in the inner layer are discharged from the discharge port, outside air is introduced between the outer layer and the inner layer, and only the inner layer can be reduced in volume and deformed while maintaining the shape of the outer layer. That is, it is possible to discharge the contents contained in the inner layer without replacing them with outside air, and the contents remaining inside the inner layer are less likely to come into contact with air, so that their deterioration and alteration can be suppressed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, such a double-walled container body is formed, for example, by stretch blow molding a preform assembly having an outer preform and an inner preform. When the outer layer is formed into a bottle shape having a cylindrical mouth, a shoulder that widens from the lower end of the mouth, and a body that continues below the shoulder, the amount of stretching of the shoulder is generally smaller than that of the body, and the shoulder becomes thicker than the body. That is, because the thick shoulder does not have as much flexibility as the body, when the contents are dispensed, the outer layer deforms together with the inner layer at the shoulder, and the outer layer may collapse.

[0006] To address this crushing problem, Patent Document 3 describes a technique in which an intake pin is inserted into an intake hole provided at the mouth of the container body, and the protruding portion of the intake pin pushes the inner layer away from the inner surface of the outer layer. However, the need for an intake pin increases the number of parts. In addition, the need to attach the intake pin to the container body before installing the dispenser increases the amount of work required.

[0007] In view of these points, the present invention can effectively suppress the crushing of the outer layer at the shoulder portion, and can also suppress the increase in the number of parts and work hours compared to the conventional method. The vessel The purpose is to provide. [Means for solving the problem]

[0008] The present invention relates to a double-layered container body having an outer layer having a cylindrical mouth, a shoulder that widens in diameter from the lower end of the mouth, and a body that extends below the shoulder, and an inner layer that is peelably laminated on the inner surface of the outer layer. A dispensing container comprising a dispensing port for dispensing contents, and a dispensing device attached to the port, The outer layer has a shoulder through-hole that penetrates the outer layer at the shoulder portion, The discharger is a discharge container that, when attached to the mouth, is inserted into the shoulder through-hole and has a projection at its tip that protrudes from the inner surface of the shoulder.

[0009] When the projection is inserted through the shoulder through-hole, it is preferable that a gap is provided between the shoulder through-hole and the projection. [Effects of the Invention]

[0011] According to the discharge container of the present invention, by attaching the discharger to the container body, a projection provided on the discharger is inserted into the shoulder through-hole, and the tip of this projection protrudes from the inner surface of the shoulder. In other words, the projection separates the inner layer from the outer layer at the shoulder, thereby effectively suppressing the problem of the outer layer being crushed at the shoulder when the contents are discharged. Furthermore, since this projection is provided on the discharger for discharging the contents, there is no need to use a new component such as the intake pin mentioned above, so it does not lead to an increase in the number of parts or work hours. [Brief explanation of the drawing]

[0012] [Figure 1] This is a partially enlarged half-cross-sectional view showing the state immediately before the dispenser is attached to the container body, relating to one embodiment of the discharge container according to the present invention. [Figure 2] This is a half-cross-sectional view of the preform assembly used when molding the container body shown in Figure 1. [Figure 3] Figure 1 is a partially enlarged half-cross-sectional view showing the discharge container with the dispenser attached to the container body. [Modes for carrying out the invention]

[0013] The discharge container and preform assembly according to the present invention will be described below with reference to the drawings. In this specification, the positional relationship will be described in an upright position with the container body placed on a horizontal surface. In this specification, the vertical direction refers to the direction along the illustrated axis O (the axis of the container body 1, which will be described later). The radial direction refers to the direction perpendicular to axis O in a plane perpendicular to axis O, and the circumferential direction refers to the direction of rotation around axis O in this plane.

[0014] The discharge container 100 of the present embodiment includes a container body 1 for storing the content and a pump-type discharger 4 for discharging the content stored in the container body 1.

[0015] First, the container body 1 will be described. The container body 1 is composed of an outer layer body 2 forming the outer shell of the container body 1 and an inner layer body 3 provided inside the outer layer body 2.

[0016] The outer layer body 2 is formed in a bottle shape, and has a cylindrical (cylindrical in this embodiment) mouth portion 2a that extends along the axis O and is open at the upper side, a shoulder portion 2b that expands in diameter from the lower end of the mouth portion 2a (in this embodiment, inclines downward as it goes outward in the radial direction), and a cylindrical body portion 2c that continues below the shoulder portion 2b. A bottom portion (not shown) for closing the body portion 2c is provided at the lower end of the body portion 2c. And the shoulder portion 2b is thicker than the thickness of the body portion 2c. In addition, the discharge container 100 of the present embodiment discharges the content stored in the container body 1 by a pump-type discharger 4, and since it is not necessary to squeeze (compress) the body portion 2c when discharging the content, the thickness of the body portion 2c is relatively thick.

[0017] The outer layer body 2 also includes a mouth portion side engaging portion 2d that protrudes radially outward from the outer peripheral surface of the mouth portion 2a and forms an annular shape, and an annular neck ring 2e located below the mouth portion side engaging portion 2d. And a shoulder through hole 2f penetrating the outer layer body 2 is provided in the shoulder portion 2b. There is no limitation on the shape of the shoulder through hole 2f, and it may be circular, elliptical, or polygonal in a state facing the shoulder portion 2b.

[0018] The inner layer body 3 is thinner than the outer layer body 2 and is in a bag shape, and is laminated on the inner surface of the outer layer body 2 in a peelable manner. An accommodation space S for accommodating the content is defined inside the inner layer body 3. Examples of the content accommodated in the accommodation space S include cosmetics such as lotion, toiletries such as shampoo, conditioner, and liquid soap, food seasonings such as soy sauce, and medicines.

[0019] The outer layer body 2 and the inner layer body 3 are both made of synthetic resin, and are formed of, for example, polyethylene terephthalate resin (PET), polyester resin, polyolefin resin, nylon resin, polycarbonate resin (PC resin), cycloolefin copolymer resin (COC resin), cycloolefin polymer resin (COP resin), etc. The outer layer body 2 and the inner layer body 3 may be formed of synthetic resin of the same material (for example, both the outer layer body 2 and the inner layer body 3 are made of polyethylene terephthalate resin), or may be formed of synthetic resin of different materials (for example, the outer layer body 2 is made of polyethylene terephthalate resin and the inner layer body 3 is made of polypropylene resin). Further, the outer layer body 2 and the inner layer body 3 may be formed such that each has a single-layer structure by a single synthetic resin, or may be formed such that each has a laminated structure by laminating a plurality of synthetic resins, or one may have a single-layer structure and the other may have a laminated structure.

[0020] In forming the container body 1 provided with such an outer layer body 2 and an inner layer body 3, in this embodiment, the preform assembly 200 shown in FIG. 2 is used, and the preform assembly 200 is subjected to stretch blow molding (specifically, a biaxial stretch blow molding in which a stretch rod is inserted inside the preform assembly 200 to stretch the preform assembly 200 in the longitudinal direction, and a high-pressure medium (which may be a gas or a liquid) is introduced inside the preform assembly 200 to stretch it in the lateral direction) to form the container body 1.

[0021] The preform assembly 200 includes an outer preform 202 for forming the outer layer body 2 and an inner preform 203 for forming the inner layer body 3.

[0022] The outer preform 202 can be obtained, for example, by injection molding the synthetic resin that constitutes the outer layer 2. In this embodiment, the outer preform 202 is generally shaped like a test tube and has a cylindrical mouth portion 202a formed as a mouth portion 2a. The outer circumferential surface of the mouth portion 202a is provided with a mouth-side engaging portion 2d and a neck ring 202e, which are formed as a mouth-side engaging portion 2d and a neck ring 202e. Below the mouth portion 202a, there is a cylindrical body portion 202c, which is closed at the bottom in a hemispherical shape and has its top connected to the neck ring 202e. The body portion 202c becomes the shoulder portion 2b, the torso portion 2c, and the bottom portion (not shown) of the outer layer 2 by stretch blow molding the preform assembly 200. Here, the portion of the main body 202c that is molded as the shoulder portion 2b (the portion of the main body 202c that is close to the neck ring 202e) is referred to as the planned shoulder portion 202b.

[0023] The planned shoulder portion 202b is provided with a through-hole 202f that penetrates the outer preform 202. The through-hole 202f becomes the aforementioned shoulder through-hole 2f by stretch blow molding the preform assembly 200.

[0024] The inner preform 203 can be obtained, for example, by injection molding the synthetic resin that constitutes the inner layer 3. In this embodiment, the inner preform 203 is generally test-tube shaped and is formed to be inserted inside the outer preform 202.

[0025] After preparing the outer preform 202 and inner preform 203, the inner preform 203 is inserted inside the outer preform 202 to assemble the preform assembly 200. A release agent may be interposed between the outer preform 202 and the inner preform 203. One example of a release agent is silicone oil. When interposing a release agent, it may be applied to the inner surface of the outer preform 202 or to the outer surface of the inner preform 203. The preform assembly 200 may be one in which the outer preform 202 and the inner preform 203 are in complete contact, as shown in the figure, or there may be a gap between the outer preform 202 and the inner preform 203.

[0026] After preparing the preform assembly 200 in this manner, the preform assembly 200 is fixed to a blow molding die, which has a cavity shaped like the container body 1 on its inside, by abutting the neck ring 202e against the reference surface of the die. It is preferable to preheat the preform assembly 200 in a heating furnace before fixing it to the blow molding die. Then, by inserting a stretching rod into the inside of the preform assembly 200 and stretching the preform assembly 200 in the longitudinal direction, and by introducing a high-pressure medium into the inside of the preform assembly 200 and stretching it in the lateral direction, the container body 1 as shown in Figure 1 can be obtained. The preform assembly 200 may also be stretched without using a stretching rod.

[0027] Furthermore, in the container body 1 obtained by biaxial stretch blow molding, the mouth portion 202a located above the neck ring 202e is not substantially stretched, and the thickness of the mouth portion 2a in the container body 1 is substantially the same as the thickness of the mouth portion 202a in the preform assembly 200. On the other hand, the thickness of the main body portion 202c is reduced by biaxial stretch blow molding, but in the container body 1, the shoulder portion 2b is thicker than the body portion 2c. In other words, in the container body 1, the inner layer 3 is easily separated from the inner surface of the outer layer 2 because the thin body portion 2c is flexible, but in the shoulder portion 2b, the flexibility is reduced, so the inner layer 3 is difficult to separate from the inner surface of the outer layer 2.

[0028] Next, the discharger 4 will be described. The discharger 4 in this embodiment is composed of the cylinder 5, stem 6, nozzle head 7, mounting cap 8, auxiliary cap 9, packing 10 shown in the figure, as well as the components described below, and functions as a so-called pump-type discharger.

[0029] The cylinder 5 comprises a cylindrical cylinder body 5a, a flange 5b extending radially outward from the upper part of the cylinder body 5a, and a locking claw 5c provided above the flange 5b. Inside the cylinder 5 is a suction valve (not shown), and a suction pipe (not shown) is attached to the lower end of the cylinder 5 for drawing the contents contained in the container body 1 into the cylinder 5.

[0030] The stem 6 is hollow and inserted inside the cylinder 5. A piston (not shown) is provided at the lower end of the stem 6, which slidably contacts the inner circumferential surface of the cylinder 5. The stem 6 is also biased upward by a spring (not shown).

[0031] The nozzle head 7 is connected to the upper end of the stem 6 and includes a head body 7a with an internal passage for supplying contents from the stem 6. The head body 7a is provided with a male threaded portion 7b that screws into the auxiliary cap 9 when the nozzle head 7 is pressed down. The nozzle head 7 also includes a hollow nozzle 7c that protrudes radially outward from the head body 7a and connects to the aforementioned internal passage. The tip of the nozzle 7c is provided with a discharge port 7d for discharging the contents.

[0032] The mounting cap 8 comprises an annular top wall 8a that covers the flange 5b and a peripheral wall 8b that extends downward from the top wall 8a. The inner surface of the peripheral wall 8b is provided with a cap-side engaging portion 8c that engages with the mouth-side engaging portion 2d when the discharger 4 is mounted on the container body 1.

[0033] The mounting cap 8 is also equipped with a projection 8d that protrudes downward from the lower end of the peripheral wall 8b. As shown in Figure 3, when the dispenser 4 is attached to the container body 1, the projection 8d is shaped to be inserted into the shoulder through-hole 2f and to have its tip protrude from the inner surface of the shoulder 2b. The illustrated projection 8d is cylindrical with a hemispherical tip, but as long as the projection 8d is inserted into the shoulder through-hole 2f and has its tip protrude from the inner surface of the shoulder 2b as described above, there are no particular restrictions on its shape. Furthermore, as will be described later, it is preferable that the projection 8d is configured so that there is a gap between the shoulder through-hole 2f and the projection 8d when it is inserted into the shoulder through-hole 2f, but it may also be in close contact with the shoulder through-hole 2f when it is inserted into the shoulder through-hole 2f.

[0034] The auxiliary cap 9 is located above the mounting cap 8 and is held in place by a locking claw 5c, thereby allowing the mounting cap 8 to rotate and remain in place between itself and the flange 5b. The auxiliary cap 9 has a female threaded portion 9a that screws into the male threaded portion 7b.

[0035] The packing 10 is made of an elastic material, shaped into an annular form, and is installed below the flange 5b. When the dispenser 4 is attached to the container body 1, the packing 10 is sandwiched between the container body 1 and the flange 5b, thereby preventing leakage of the contents contained in the container body 1.

[0036] The container body 1 and the dispenser 4, which have this configuration, are assembled as a discharge container 100 by attaching the dispenser 4 to the container body 1, as shown in Figure 3. During assembly, the contents are placed in the storage space S of the container body 1. When attaching the mounting cap 8 to the mouth portion 2a, the projection 8d is inserted into the shoulder through hole 2f, as shown in Figure 3. At this time, the tip of the projection 8d protrudes from the inner surface of the shoulder portion 2b, as described above. Therefore, even if the inner layer 3 has not been separated from the inner surface of the outer layer 2 at the shoulder portion 2b, as shown in Figure 1, the projection 8d can separate the inner layer 3 from the inner surface of the outer layer 2, as shown in Figure 3. In this embodiment, when the projection 8d is inserted through the shoulder through hole 2f, a gap is provided between the shoulder through hole 2f and the projection 8d. That is, it is possible to introduce air between the outer layer 2 and the inner layer 3 through this gap, and this gap can be used as an outside air inlet. Alternatively, an outside air inlet that penetrates the outer layer 2 may be provided separately, and configured such that when inserted into the shoulder through-hole 2f, the shoulder through-hole 2f and the projection 8d are in close contact (airtightly sealing the shoulder through-hole 2f).

[0037] Thus, with the discharge container 100 of this embodiment, by using the discharger 4, the inner layer 3 can be separated from the inner surface of the outer layer 2 at the shoulder portion 2b, thereby effectively suppressing the crushing of the outer layer 2 at the shoulder portion 2b, and also reducing the increase in the number of parts and work hours compared to conventional methods.

[0038] Furthermore, when disposing of the container body 1 after use, the outer layer 2 and inner layer 3 can be separated. Even if the outer layer 2 and inner layer 3 are made of different materials, they can be separated by material type, resulting in excellent recyclability. Additionally, since no contents adhere to the outer layer 2, it does not require washing for recycling, which is another advantage.

[0039] Although one embodiment of the present invention has been described above, the present invention is not limited to such specific embodiments, and unless otherwise specifically limited in the above description, various modifications and changes are possible within the scope of the spirit of the present invention as described in the claims. For example, the configurations of the embodiments described above can be added or deleted as appropriate, and the configuration of one embodiment can be provided in other embodiments. Furthermore, the effects in the embodiments described above are merely illustrative of the effects that may arise from the present invention, and do not mean that the effects of the present invention are limited to the effects described above.

[0040] For example, the discharger 4 is not limited to the one shown in the figure, and may be any other pump-type discharger. Also, the discharger 4 is not limited to a pump type, and a squeeze-type discharger equipped with a check valve or the like that can be used to squeeze (compress) the body 2c may be used. Furthermore, although the projection 8d in this embodiment was integrally provided with the mounting cap 8, the projection 8d may be provided on a different member attached to the mounting cap 8. Also, the projection 8d may be provided on a member of the discharger 4 other than the mounting cap 8.

[0041] Furthermore, as a configuration for attaching the dispenser 4 to the container body 1, this embodiment employs a so-called stoppering configuration (undercut fitting) in which the mouth-side engaging portion 2d and the cap-side engaging portion 8c are engaged. However, it is not limited to this, and for example, a configuration may be adopted in which a male thread portion is provided on the outer circumferential surface of the mouth portion 2a and a female thread portion is provided on the inner circumferential surface of the mounting cap 8, and the male thread portion and the female thread portion are screwed together. When such a screw-fitting configuration is adopted, the projection 8d provided on the mounting cap 8 rotates together with the mounting cap 8 as it approaches the shoulder through hole 2f during screwing. However, even if the projection 8d comes into contact with the shoulder portion 2b before being inserted into the shoulder through hole 2f, the shoulder portion 2b elastically deforms inward of the outer layer body 2, so the insertion of the projection 8d into the shoulder through hole 2f is not hindered. [Explanation of Symbols]

[0042] 1: Container body 2: Outer body 2a: Mouth 2b: Shoulder 2c: Torso 2d: Mouth side engaging part 2e: Neck ring 2f: Shoulder through hole 3: Inner layer 4:Dispenser 5: Cylinder 5a: Cylinder body 5b: Flange 5c:Latching claw 6: Stem 7: Nozzle head 7a: Head body 7b: Male threaded section 7c: Nozzle 7d:Discharge port 8: Mounting cap 8a: Ceiling wall 8b: Surrounding wall 8c: Cap-side engagement part 8d: Protrusion 9: Auxiliary cap 9a: Female threaded portion 10: Packing 100: Discharge container 200: Preform assembly 202: External preform 202a: Mouth 202b: Planned shoulder area 202c: Main body 202d: Mouth side engaging part 202e: Neck ring 202f: Through hole 203: Internal preform O: Axis line S: Containment space

Claims

1. A double-layered container body having an outer layer having a cylindrical mouth, a shoulder that widens in diameter from the lower end of the mouth, and a body that extends below the shoulder, and an inner layer that is peelably laminated on the inner surface of the outer layer, A dispensing container comprising a dispensing port for dispensing contents, and a dispensing device attached to the port, The outer layer has a shoulder through-hole that penetrates the outer layer at the shoulder portion, The discharger is a discharge container having a projection that is inserted into the shoulder through-hole when attached to the mouth and whose tip protrudes from the inner surface of the shoulder.

2. The discharge container according to claim 1, wherein a gap is provided between the shoulder through-hole and the projection when the projection is inserted through the shoulder through-hole.

Images