JP5674014B2 - Container with plastic cap - Google Patents

Description

  The present invention relates to a container with a cap made of synthetic resin in which a cap is attached to a container body by screwing between screw parts, and in particular, a thin-walled wide-mouthed container in which a body part of a container body has flexibility, Locking portions for engagement are formed below the screw portions of the mouth portion of the main body and the skirt portion of the cap, and the lock portions are engaged with each other in a state where the screw portions are screwed together. The present invention relates to a container with a cap made of synthetic resin.

  In a container with a cap made of synthetic resin in which a cap is attached to a container body by screwing between screw parts, for the purpose of preventing the screwing between screw parts from loosening in a state where the cap is attached to the container body It has been conventionally known, for example, from the following patent documents and the like, for example, that locking portions that are engaged with each other in a state where the screw portions are screwed are provided on the container body side and the cap side, respectively. .

  That is, the following Patent Document 1 states that “on the outer peripheral surface near the upper end of the container body neck and neck portion, outwardly so that the outer diameter is smaller than the diameter of the trough of the screw portion near the lower end of the mouth neck portion. An engaging portion is formed on the lower surface of the top wall of the cap. At the position where the threaded part of the mouth and neck and the threaded part of the cap are screwed up, the engaging part at the lower end of the engaging part of the cap is below the locking convex part of the mouth and neck. The configuration of “contacting and engaging” is disclosed.

  Further, in Patent Document 2 below, “in the container cap device in which the cap inner cylinder portion is screwed to the container opening head, the overhanging protrusion of the container opening head is formed immediately before the screwing end position of the screw portion. Provided with a click mechanism that the elastic leg portion of the inner cylinder portion of the cap rides over with the click sudden rotation, and at the end of the sudden rotation of the click over the container, the container sealing width portion of the container opening head and the cap sealing width portion of the cap inner cylinder portion, Is provided with a sealing mechanism that makes contact in a sealed state.

Japanese Patent Laid-Open No. 10-24942 JP 2000-109104 A

  By the way, as one of the containers with cap made of synthetic resin in which the cap is mounted on the container body by screwing between the screw portions, for example, it is said to be a so-called shake container (or whip container) used for hair dye. There is something. In this shaker container for hair dye, for example, one and two hair dye liquids are stored in a container and a cap is attached, and then shaken by holding the body of the container by hand (continuously up and down). Shake strongly), after mixing 1st and 2nd hair dyes well and mixing with air, lather, remove cap and remove hair dye by hand, well-foamed hair dye It is used to dye hair.

  In such a shaker container for hair dye, when a consumer shakes by holding the body of the container with his / her hand (successfully moves up and down 30 times in order to foam the hair dye), If the torso is thick and hard, the container may slip out of the hand during the shake, so the body was held by hand by making the torso thin and flexible. When doing this, it is better to make it slightly deform inward so that it is in close contact with the hand. For this purpose, by reducing the overall thickness of the container body and the cap, the cost of the resin material used for the container can be reduced.

  Therefore, the present inventor uses a thermoplastic resin such as high-density polyethylene, polypropylene, or polyethylene terephthalate as a material for the container body and the cap, so that a sufficient amount of air and liquid can be stored in the container. A dome bulging upward is formed, the height from the bottom of the container body to the opening is set to 110 to 160 mm, and a portion of 10 to 20 mm downward from the opening to mount the cap is a short cylindrical shape In order to make it easier for the foamed hair dye to adhere to the hand and to be taken out as the mouth of the container, the outer diameter of the mouth of the container body is substantially the same as the outer diameter of the upper end of the trunk. For the hair dye shake container having an outer diameter of 60 mm or more, preferably 60 to 130 mm, the thickness of the container body or cap is thin (thickness is 1 mm or less, preferably 0). In the 7Mm～1.0Mm), there is ensured a reduction in the resin material used for the container and to impart flexibility to the body portion of the container.

  On the other hand, in the shake container for hair dye that stirs and foams the content liquid by shaking the container, if the screw engagement between the container main body and the cap loosens during the shake, the content liquid may scatter around. It is necessary to reliably prevent the screwing from loosening during the shake. Therefore, in order to prevent loosening of the screw connection between the container main body and the cap with respect to the shake container for the hair dye in which the container is thinned as described above and the body portion is made flexible. It has been found that a conventionally known configuration as described in each of the above-mentioned patent documents cannot be used as it is when adopting a configuration in which the locking portions are engaged with each other in a state where the screwing is completed. It was.

  That is, in the configuration disclosed in Patent Document 1 above, it is necessary to form the mouth and neck of the container body in a truncated cone shape, and cap the outer diameter of the opening (upper end of the mouth and neck) of the container body. The outer diameter of the container body is required to be smaller than the outer diameter of the container body. It cannot be applied as it is to a wide-mouthed container having a diameter of 60 mm or more.

  In the configuration disclosed in Patent Document 2, the outer diameter of the container opening head is smaller than the outer diameter of the cap (outer cylinder portion). And, as the metal bumper is made of a hard material such as glass or metal, the jumping protrusion on the container opening head is elastically deformed and the elastic leg part of the cap inner cylinder part is elastically deformed to get over the protrusion smoothly. The container opening head needs to be made of a hard member as described in the above description, so that the configuration is made by reducing the thickness of the mouth of the container body (thickness is 1 mm). The following cannot be applied to the wide-mouthed container as it is.

  Therefore, the outer diameter of the mouth of the container body is substantially the same as the outer diameter of the upper end of the body (outer diameter is 60 mm or more), and the container body and cap are thinned (thickness is 1 mm or less). The outer peripheral surface of the cylindrical mouth extending downward from the upper end opening of the container body, with respect to the shake container for the hair dye, which is a flexible and thin-walled synthetic resin container, A multi-threaded screw part is formed on the inner peripheral surface of the cylindrical skirt part extending downward from the outer edge of the top of the cap, and a locking part by a groove and a ridge is formed below each screw part. The locking portions are engaged with each other in a state where the screw portions are completed.

  However, in such a thin, wide-mouthed synthetic resin container having a flexible body barrel, when the container body is pressed strongly, the portion of the mouth to which the cap is attached also bends inward. Therefore, when the container body is shaken by strongly grasping the body part of the container body, it is affected by the large deformation of the body part and the mouth part bends inward to form on the outer peripheral surface of the mouth part. As a result, there is a possibility that the contents of the container may jump out due to the engagement between the mouth portion and the cap being disengaged and the screwing being loosened. I understood.

  An object of the present invention is to solve the above-described problems. Specifically, the barrel portion of the container body is a thin-walled wide-mouthed container, and screwing between the screw portions is completed. For containers with caps made of synthetic resin that engage the locking parts in a state, even if the body is gripped strongly, the mouth bends inward and disengages from the cap, loosening the screw The problem is to make sure that there is no problem.

In order to solve the above problems, the present invention is formed so that the overall thickness of the container main body is 1 mm or less, excluding protruding parts such as screw parts and locking parts, and the container A cylindrical mouth portion of the main body is formed to have an outer diameter of 60 mm or more, and a body portion of the container main body is a thin-walled wide-mouthed container having flexibility, and extends downward from the upper end opening of the container main body. A male screw portion made of a plurality of threads is formed on the outer peripheral surface of the mouth portion, and a female screw portion made of a plurality of threads is formed on the inner peripheral surface of the skirt portion extending downward from the outer edge of the top of the cap. In addition, locking portions for engagement are formed below the respective screw portions of the mouth portion of the container body and the skirt portion of the cap, and the screw portions are completely screwed together. Synthetic resin cap with caps that can be engaged with each other In,
The cap skirt is formed with a concave groove extending in the circumferential direction as a locking portion for engaging with the ridge of the mouth of the container body. Is formed with a male thread portion so that the end sides of adjacent threads of the plurality of threads overlap in the vertical direction, and further overlaps with the portion where the threads of the male thread overlap. A plurality of ridges each having a circumferential length of 2 to 16 mm close to each other so as to overlap with each other as a locking portion for engaging with the concave groove portion of the cap. placed is formed, with the engaging portions to complete the screwing of the threaded portions of the container body and the cap are engaged, a portion of the threads of the female threaded portion of the cap of the container body of the male threaded portion It is configured to be sandwiched between two overlapping threads. That.

  According to the container with a cap made of the synthetic resin of the present invention as described above, the cylindrical mouth portion of the container body is thin (thickness is 1 mm or less, preferably 0.7 mm to 1.0 mm) and has a wide mouth (outside Even if the diameter is 60 mm or more, preferably 60-130 mm, the mouth of the container body has a high rigidity at the portion where the thread of the male screw portion overlaps, and is formed as a locking portion. Since the portions of the projected ridges have increased rigidity, and these portions are close to each other so as to overlap each other in the vertical direction, the portions are further reinforced by reinforcing each other. ing.

  Further, in a state in which the cap is attached to the container body (a state in which the screw parts are completely screwed together and the locking parts are engaged with each other), a part of the thread of the female thread part of the cap is a male part of the container body. Because it is sandwiched between the screw threads that overlap the screw part, it is difficult for the male screw part and female screw part to loosen, and the screw part of the male screw part overlaps On the other hand, the thread of the female screw portion further overlaps, so that the rigidity of the portion is further enhanced.

  As a result, with the cap attached to the container body, even if the consumer squeezes the container too much and the body part of the container body is greatly deformed, the mouth part of the container body is thin. Since the rigidity of the screwed part and the engaging part of the mouth is sufficiently strengthened, the screwed part and the engaging part of the mouth are deformed inward due to the deformation of the trunk part. In addition, since the screwing is also difficult to loosen, the container does not come out by loosening the screwing because the engagement between the mouth of the container body and the cap is released.

It is a perspective view which shows one Example of the container with a cap of this invention. It is a partial expansion explanatory view which shows the state where screwing of the container main part and the screw parts of a cap was completed, and latching parts were engaged in the container with a cap of the present invention.

For a container with a cap made of a synthetic resin such that the body of the container body is a flexible thin-walled wide-mouthed container and the engaging parts are engaged with each other in a state where the screw parts are screwed together. The cap skirt has a purpose of preventing the mouth from bending inward and disengaging from the cap even when the handle is strongly gripped, as shown in the following examples. On the part, a concave groove extending in the circumferential direction is formed as a locking part for engaging with the convex part of the mouth part of the container body. The male screw part is formed so that the end sides of the adjacent screw threads overlap with each other in the vertical direction, and the screw thread of the male screw part further overlaps with the overlapping part in the vertical direction. in proximity to a plurality of the convex portion length in the circumferential direction is 2~16mm each cache State as locking portions for groove portions engage to form at intervals in the circumferential direction, the engaging portions are engaged to complete the screwing of the threaded portions of the container body and the cap Thus, it has been realized that a part of the screw thread of the female screw part of the cap is configured to be sandwiched between the double screw threads of the male screw part of the container body.

  The container with a cap of the present embodiment stores the hair dye (1 liquid and 2 liquids) in the container, attaches the cap, and then shakes the container body by hand 30 times or more (up and down) The container is such that the hair dye 1 and 2 are mixed thoroughly and air is also mixed and foamed, and then the cap is removed and the hair dye is taken out by hand. Each of the container body and the cap constituting the container with a cap is formed of an appropriate thermoplastic resin such as high-density polyethylene, polypropylene, or polyester resin.

As shown in FIG. 1, a container 1 with a cap according to this embodiment includes a container body 2 and a cap 3, and the container body 2 is integrally formed with a bottom portion 21, a trunk portion 22, and a mouth portion 23. In order to make it easy to take out the contents by enlarging the opening, and to make it easier to grip even if the hand is small, the torso 22 has a tapered wall surface whose diameter decreases from the opening to the bottom. Is formed. The mouth portion 23 has a cylindrical shape that extends downward from the upper end opening by a length (height) of 10 to 20 mm, and has an outer diameter that is substantially the same as the outer diameter of the upper end of the body portion 22. Is formed. That is, in consideration of taking out the foamed hair dye by hand, the mouth 23 specifically has an outer diameter of 60 mm or more (60 to 130 mm, preferably in the range of 80 to 110 mm). Is formed .

  The container body 2 and the cap 3 are both thinned to reduce the resin material to be used. Specifically, the container body 2 and the cap 3 are slightly different depending on the resin material to be used. The wall thickness is reduced to 1 mm or less (preferably in the range of 0.7 to 1 mm in consideration of the robustness of the container) except for such protruding portions, and thereby The body 22 of the container body 2 is flexible so that it fits when the consumer holds it with his hand to shake the container.

  On the outer peripheral surface of the mouth portion 23 of the container body thinned with such a wide mouth, a male screw portion 24 which is a screw portion on the container body 2 side is formed, and below that, a locking portion on the container body 2 side is formed. The ridge part 25 which is is formed. Further, in this embodiment, when the cap 3 is attached to the container body 2, the lower end of the mouth portion 23 protrudes outward from the outer peripheral surface of the mouth portion 23 in order to support the lower end of the skirt portion 33 of the cap 3. An annular flange 26 is formed to be a thick part.

  The male screw portion 24 formed on the outer peripheral surface of the mouth portion 23 of the container body 2 is composed of a plurality of threads (in this embodiment, eight), and is engaged below the male screw portion 24. A plurality of (eight in the present embodiment) protruding ridges 25 are formed at intervals in the circumferential direction as the locking portions for. On the other hand, although not shown in the figure on the inner peripheral surface of the skirt portion 33 of the cap 3, a plurality of strips (four strips in this embodiment) for screwing with the male screw 24 of the mouth portion 23 of the container body 2 are used. ) Is formed as a locking portion for engaging the convex portion 25 of the mouth portion 23 of the container body 2 below the female screw. A concave groove portion (a “concave groove portion 35” shown in FIG. 2) extending continuously in the circumferential direction is formed.

  The cap 3 is formed by integrally forming a cylindrical skirt portion 33 so as to extend downward from the outer edge of the top formed by the dome portion 31 and the annular outer peripheral portion 32 (the outer edge of the annular outer peripheral portion 32). However, the inner surface side of the top portion of the cap 3 (the dome portion 31 and the annular outer peripheral portion 32) has a cylindrical shape so as to hang downward from the connecting portion between the lower end of the dome portion 31 and the inner end of the annular outer peripheral portion 32. The inner plug portion is integrally formed, and the outer peripheral surface of the inner plug portion that is concentrically disposed inside the skirt portion 33 is spaced from the outer peripheral surface of the container body 2 with the cap 3 attached (both In a state where the screwing is completed, the container body 2 comes into close contact with the inner peripheral surface of the mouth portion 23.

  By the way, in the container 1 with a cap according to the present embodiment including the container main body 2 and the cap 3 as described above, the male screw portion 24 formed of a plurality of threads formed in the mouth portion 23 of the container main body 2 As shown in FIG. 2, the adjacent threads 24 (a), (b), (c) among the plurality of threads are on the left end side when viewed in the longitudinal direction of one thread 24 (b). (The lower end side when viewed in the vertical direction) and the right end side (the upper end side when viewed in the vertical direction) of the left adjacent thread 24 (a) are overlapped in the vertical direction. In addition, the right end side as viewed in the longitudinal direction of one screw thread 24 (b) (the upper end side as viewed in the vertical direction) and the left end side as viewed in the longitudinal direction of the right adjacent thread 24 (c). (The bottom end side when viewed in the vertical direction) and the adjacent threads in the multiple threads End side to each other so that the overlapped doubly vertically.

  Then, the threaded portions of the container main body 2 and the cap 3 are screwed together (in this embodiment, the four threaded threads of the female threaded part are every other four threads among the eight threaded threads of the male threaded portion. In the state where the screwing is completed, a part of the thread of the female threaded portion 34 of the cap (the right end side when viewed in the longitudinal direction and the upper end side when viewed in the vertical direction) is the portion of the male threaded portion 24 of the container body. The protrusions 25 that are sandwiched between the double screw threads 24 (b) and (c) and that are the locking portions of the container body 2 are recessed grooves 35 that are the locking portions of the cap 3. The thread 24 (a), (b), (c) of the male threaded portion 24 is close to each other so as to further overlap in the vertical direction. (Specifically, it is 2-10 mm away from the portion where the threads overlap twice).

  As for the length of one part where the end sides of adjacent screw threads overlap each other, if it is too short, the reinforcing effect and the anti-loosening effect will be insufficient. The frictional resistance of the female thread passing between the overlapping threads is increased, and therefore it is preferable to set the range of 1/25 to 1/3 with respect to the length of one thread of the male thread portion 24. . In addition, the length of one of the plurality of ridge portions 25 needs to be 2 mm or more from the viewpoint of the strength of the engaging force when engaged (inserted) in the groove portion 35. On the other hand, it is necessary to make the length 16 mm or less from the viewpoint of die-cutting property after molding (for example, injection molding or compression molding), but engagement (insertion) with the concave groove 35 is required. In consideration of easiness, the range of 4 to 10 mm is preferable.

  According to the container 1 with a cap of the present embodiment as described above, the cylindrical mouth portion 23 of the container body 2 is thin with a thickness of 1 mm or less (preferably within a range of 0.7 mm to 1.0 mm). Even if the outer diameter is formed in a wide mouth having a diameter of 60 mm or more (in the range of 60 to 130 mm, preferably in the range of 80 to 110 mm), the screw thread of the male screw part 24 overlaps with the mouth part 23 of the container body 2. Since the rigidity is high at the portions, the rigidity is high at the portions of the ridges 25 formed as the locking portions, and these portions are close to each other so as to overlap each other in the vertical direction. By reinforcing each other, the part is further strengthened.

  Further, in a state where the cap 3 is mounted on the container body 2 (a state where the screw portions are screwed together and the locking portions are engaged), a part of the thread of the female screw portion 34 of the cap 3 ( Since one end side in the longitudinal direction) is sandwiched between the double screw threads of the male screw portion 24 of the container body 2, the screwing by the male screw portion 24 and the female screw portion 34 is difficult to loosen. In addition, the screw thread of the female screw part 34 further overlaps with the part where the screw threads of the male screw part 24 overlap with each other, whereby the rigidity of the part is further strengthened.

  As a result, with the cap 3 attached to the container body 2, even if the consumer squeezes the container too much and the body 22 of the container body 2 is greatly deformed, the mouth 23 of the container body 2 is thin. In spite of this, the rigidity of the threaded portion by the male screw portion 24 and the female screw portion 34 and the engaging portion by the convex ridge portion 25 and the concave groove portion 35 are sufficiently enhanced, Since these portions are not deformed inward due to the deformation of the body portion, and the screwing by the male screw portion 24 and the female screw portion 34 is difficult to loosen, the mouth portion 23 of the container main body 2 is not loosened. And the cap 3 is disengaged and the screw engagement is loosened, so that the contents of the container do not pop out.

  In the present embodiment, a collar portion 26 for receiving the lower end of the skirt portion 33 of the cap 3 at the lower end of the mouth portion 23 of the container main body 2 protrudes outward from the outer peripheral surface of the mouth portion 23. Since it is formed as a meat portion, the mouth portion 23 of the container body 2 is thereby further strengthened and is less susceptible to the deformation of the body portion.

As mentioned above, although one Example of the container with a cap of this invention was described, this invention is not limited only to the above Examples, For example, the conditions of each screw part of a container main body side and a cap side. The number (number of threads) and the number of protrusions formed as locking portions on the container body side are not limited to the numbers specifically shown in the examples, and the container body The cap-side locking portion formed corresponding to the protruding strip portion which is the side locking portion is not limited to the concave groove portion extending continuously in the circumferential direction as shown in the embodiment, but in the circumferential direction. It is needless to say that the design can be changed as appropriate, such as a plurality of concave groove portions (discontinuous concave groove portions arranged in an annular shape ) extending in a circle.

DESCRIPTION OF SYMBOLS 1 Container with a cap 2 Container body 3 Cap 22 (Body body) trunk 23 (Container body) mouth part 24 Male thread part 25 Projection part 33 (Cap) Skirt part 34 Female thread part 35 Concave groove part

Claims (2)

The container body is formed so that the overall thickness of the container body is 1 mm or less, excluding protruding parts such as screw parts and locking parts, and the outer diameter of the cylindrical mouth part of the container body is 60 mm or more. The body of the container body is a flexible thin-walled wide-mouthed container, and the male body is composed of a plurality of threads on the outer peripheral surface of the mouth extending downward from the upper end opening of the container body. A threaded portion is formed, and a female threaded portion made up of a plurality of threads is formed on the inner peripheral surface of the skirt portion extending downward from the top outer edge of the cap, and the mouth portion of the container body and the skirt portion of the cap A locking portion for engagement is formed below each screw portion, and the locking portions are made of synthetic resin so that the locking portions are engaged with each other in a state where the screw portions are screwed together. In capped containers,
The cap skirt is formed with a concave groove extending in the circumferential direction as a locking portion for engaging with the ridge of the mouth of the container body. Is formed with a male thread portion so that the end sides of adjacent threads of the plurality of threads overlap in the vertical direction, and further overlaps with the portion where the threads of the male thread overlap. A plurality of ridges each having a circumferential length of 2 to 16 mm close to each other so as to overlap with each other as a locking portion for engaging with the concave groove portion of the cap. placed is formed, with the engaging portions to complete the screwing of the threaded portions of the container body and the cap are engaged, a portion of the threads of the female threaded portion of the cap of the container body of the male threaded portion Synthetic tree characterized in that it is sandwiched between doubly overlapping threads Made in a capped container.   The lower end of the mouth part of the container body is formed with a flange part for receiving the lower end of the skirt part of the cap as an annular thick part protruding outward from the outer peripheral surface of the mouth part. Item 10. A container with a cap made of synthetic resin according to item 1.

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