JP4492862B2 - cap - Google Patents

Description

  The present invention relates to a cap that is driven and fitted into an outer surface such as a mouth-and-neck portion of a container body.

  As a container composed of a container body and a cap fitted to the container body mouth / neck portion, there is known a driving type container in which the cap is fitted by pressing force from above the container body mouth / neck portion.

  For example, a plurality of elastic protrusions projecting from the inner surface of the inner periphery of the cap in a circumferential manner on the outer peripheral surface of the container body neck and neck, when fitting to the outer periphery of the mouth neck, One having a cap provided so as to get over the engaging ridge and engage with the lower surface of the engaging ridge, and to get over the engaging ridge even when removed (Patent Document 1). .

In addition, a flexible elastic ring is accommodated in the lid body with an elastically deformable clearance, and is engaged with a protrusion provided on the outer periphery of the mouth of the container body at a position opposite to the inner periphery of the elastic ring. The one provided with a projecting piece to be joined (Patent Document 2), or the elasticity of fitting the engagement ring to the cylindrical peripheral wall of the inner cap and projecting from the inner surface of the engagement ring to the inside of the cylindrical peripheral wall There is one (Patent Document 3) in which the inner ring-shaped portion of the small ring-shaped portion is engaged with the lower surface of the engagement ridge of the container body neck.
Japanese Utility Model Publication No. 49-8642 Japanese Utility Model Publication No. 3-22139 Japanese Utility Model Publication No. 5-2452

  In recent years, as caps for containers that store high-grade cosmetics, thick-walled caps and caps with high design that combine different materials have been favored. Yes.

  As described in Patent Document 1, when a relatively thin cap is used, since the cap itself has elasticity, the cap and the container body can be smoothly fitted.

  However, a thick cap or a cap formed by combining a plurality of materials does not provide sufficient elasticity due to the thickness of the cap itself, making it difficult to fit. In addition, even if the dimensional accuracy is increased, a slight shift is likely to occur when the cap is fitted to the outer periphery of the container mouth, neck, etc. There is a risk of damage. Moreover, when it is hard, the fault which the cap attachment / detachment becomes difficult has arisen.

  Therefore, as described in Patent Document 2, a flexible elastic ring is accommodated in the lid body with an elastically deformable clearance interposed therebetween, and the container main body is placed at positions facing each other on the inner periphery of the elastic ring. An engagement ring is fitted to the cylindrical peripheral wall of the inner cap as described in Patent Document 3 provided with a projecting piece to be engaged with the protrusion provided on the outer periphery of the mouth, and transparent from the inner surface of the engagement ring. There is an elastic ring-shaped portion that protrudes inward from the cylindrical peripheral wall through the hole with the inner ring-shaped portion engaged with the lower surface of the engagement ridge of the container body neck. In some cases, the cap and the main body container are smoothly fitted.

  However, when the elastic ring described in Patent Document 2 is used, a difference in aperture is required between the circular inner peripheral wall and the quadrangular outer peripheral wall of the cap, which is a great design limitation. Further, when the elastic ring described in Patent Document 3 is used, when the inner peripheral wall is thick, the elastic small ring-shaped portion is in a state of extending in the radial direction. Is difficult, the fitting is likely to be unstable, the engagement of the cap is weakened, and the cap is easily detached.

  Moreover, since it is necessary to open a through-hole in a circular inner peripheral wall, sealing property is bad, and the compounding component and dosage form to the content accommodated in a container body may be restrict | limited.

  Therefore, the present invention eliminates the disadvantages of the thick cap as described above, and can appropriately attach and detach the cap to / from the fitting portion such as the container body neck and neck portion, and further allows freedom in design and storage. A cap with a high degree of freedom in selecting contents is provided.

As a first means, it comprises a cap body 11 in which a peripheral wall 12 is formed by a double cylinder in which an outer peripheral wall 12b is fitted to the outer surface of an inner peripheral wall 12a, and an elastic ring 21 tightly fitted into the peripheral wall 12. A concave groove in which a part of the inner surface of the elastic ring 21 is exposed to the inner surface of the peripheral wall 12, a second engagement protrusion 27 projecting inward from the peripheral wall 12 to the exposed part, and the elastic ring is fitted 15 is formed in the lower part of the inner peripheral wall 12a with the inner surface and the lower surface open concave part, the first engagement tube part 17 suspended from the inner end of the upper surface of the concave part, and the outer peripheral wall suspended downward from the inner peripheral wall 12a. An inward flange 14 that protrudes inwardly while supporting the lower end of the inner peripheral wall from the portion 12b, and a second engagement cylinder portion that stands up with a gap between the flange inner end and the lower end of the first engagement cylinder portion 17 19 is formed into a convex shape with a horizontal cross section in the vertical cross section, and the upper surface portion of the convex character is formed as a horizontal cross section with the elastic ring fitted into the space. It was formed exposed to the inner surface of the peripheral wall .

As a second means, it comprises a cap body 11 having a peripheral wall 12 formed of a double cylinder in which the outer peripheral wall 12b is fitted to the outer surface of the inner peripheral wall 12a, and an elastic ring 21 closely fitted into the peripheral wall 12. Then, a part of the inner surface of the elastic ring 21 is exposed to the inner surface of the peripheral wall 12, a second engagement protrusion 27 projecting inwardly of the peripheral wall 12 is laterally provided to the exposed portion, and the elastic ring 21 is fitted. The space is formed by a lower end opening longitudinal groove 31 formed between the lower inner and outer surfaces of the inner peripheral wall 12a, and the inner peripheral wall portion of the elastic ring 21 is intermittently cut away to be an exposed portion of the inner peripheral wall surface of the elastic ring. The cap is characterized in that the lower surface of the inner peripheral wall 12a and the lower surface of the elastic ring 21 are supported by an inward flange 14 projecting inwardly from an outer peripheral wall portion suspended downward from the inner peripheral wall 12a.

As a third means, the first means is provided, and the elastic ring 21 is provided with a longitudinal cross-sectional shape, and at least an outer surface releasing concave portion 33 is provided on the outer surface side of the elastic ring portion having the second engaging protrusion 27.

  According to the present invention, even when the thickness of the peripheral wall of the cap is increased, the elastic ring is securely held with respect to the peripheral wall, and the center of the elastic ring and the container main body are not displaced, and the elastic ring is loose. There is no. And it becomes possible to perform fitting of a cap smoothly with to-be-fitted bodies, such as a container body mouth neck. Moreover, since the required difference in diameter between the inner peripheral wall and the outer peripheral wall of the cap is small, the degree of freedom in design is high.

  Furthermore, by providing the elastic ring 21 with the relief space 33 for elastic deformation of the upright cylinder 22, the elastic deformation to the outside is facilitated, and the first engagement protrusions of the fitted body are attached to the elastic ring. When the second engagement protrusion forcibly gets over, it is easy to get over and the engagement of the upper surface of the elastic ring second engagement protrusion with the lower surface of the first engagement protrusion of the fitting body is further ensured. Can do.

  In addition, if the second engagement protrusion 27 is provided around the entire circumference of the upright cylinder portion, it is possible to press the whole circumference around the outer surface of the mounting cylinder 3 and the like to seal it airtightly. High degree of freedom of possible contents.

  Referring to the drawings, FIGS. 1 to 4 show a first embodiment. 1 is a container with a vertical pump shown as an example of a cap fitted body, 2 is the container body, 3 is a mounting cylinder fitted to the outer surface of the mouth and neck of the container body, and 4 is a cylinder suspended in the container body It is a pressing head with a nozzle 5 at the upper end of the operating member that is erected upward from the inside.

  Reference numeral 11 denotes a synthetic resin cap body having a peripheral wall 12 fitted to the outer surface of the mounting cylinder 3. In the illustrated example, the cap body hangs down from the outer periphery of the top wall 13 to the inner peripheral wall 12a and to the outer surface of the inner peripheral wall. Is formed by fitting a cylindrical outer peripheral wall 12b having both upper and lower openings. The outer peripheral wall 12b exposes the upper part of the inner peripheral wall 12a above the outer peripheral wall, hangs down below the lower end of the inner peripheral wall, and protrudes the inward flange 14 from the lower part of the lower part so that the lower end surface of the inner peripheral wall is I'm covering up.

  A concave groove 15 is provided around the lower inner surface of the peripheral wall 12. The concave groove is formed in a lower portion of the inner peripheral wall 12a, with a concave portion having an inner surface and a lower open surface, a first engagement cylinder portion 17 suspended from the inner end portion of the upper surface of the concave portion, and a lower portion of the inner wall portion 12a. An inward flange 14 that protrudes inwardly while supporting the lower end of the inner peripheral wall from the outer peripheral wall 12b portion, and a second engagement that stands up with a gap between the inner end of the flange and the lower end of the first engagement tube portion 17 The cylindrical portion 19 is formed into a convex shape with a horizontal cross section.

  A first gap 16 is formed between the upper part of the recessed groove inner wall 20 and the first engaging cylinder part 17, and a second gap 18 is formed between the lower part of the recessed groove inner wall 20 and the second engaging cylinder part 19. Is done.

  The elastic ring 21 moves the first and second outward flanges 25 and 26 in the upper and lower directions via both upper and lower walls 23 and 24 projecting outward from the upper and lower ends of the upright cylindrical portion 22 exposed to the concave groove opening. These first and second outward flanges are fitted into the first and second gaps 16 and 18. A second engaging ridge 27 is provided on the inner surface of the vertical intermediate portion of the upright cylindrical portion 22, and at least a portion corresponding to the position where the second engaging ridge 27 is provided on the outer surface side of the elastic ring 21. The recess 33 is formed, and the recess and the recess groove inner wall 20 form an elastic deformation escape space of the upright cylindrical portion 22.

  In the illustrated example, the second engaging protrusions are provided at three equal positions at equal intervals in the circumferential direction as shown in FIG. 4, but they may be provided on the entire inner surface of the upright cylindrical portion 22. When the second engaging protrusion 27 is provided around the entire circumference of the standing cylinder portion in this way, the front circumference thereof can be pressure-installed on the entire outer circumference of the mounting cylinder 3 and the like to be hermetically sealed. . In addition, when the second engagement protrusions 27 are provided at several places as described above, it is preferable to provide the second engagement protrusions 27 at substantially equal intervals, since rattling at the time of fitting the cap and the container body is reduced. Then, by adjusting the size and number of the second engaging protrusions 27, the ease of overriding can be adjusted when forcibly getting over the mounting cylinder first engaging protrusion 6 described above. It can be opened and closed smoothly.

  5 and 6 show a second embodiment. The same parts as those of the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted. When only the different parts are described, a vertical groove 31 having a lower end opening is provided between the lower and inner surfaces of the inner peripheral wall 12a. A plurality of notches 32 are formed at substantially equal intervals in the inner peripheral wall portion inside the longitudinal groove. The cutout is not formed by cutting out the entire portion from the lower end to the upper end of the inner portion of the lower portion of the inner peripheral wall 12a, but may be formed above the cutout while leaving a part of the upper inner surface covering wall portion of the elastic ring described later.

  A short cylindrical elastic ring 21 is closely fitted into the longitudinal groove. On the inner surface in the vertical direction intermediate portion of the elastic ring portion exposed in the notch 32 described above, an engaging protrusion 27 is provided laterally so as to protrude inward of the peripheral wall 12.

  The outer peripheral wall 12b fitted to the outer surface of the inner peripheral wall 12a is suspended below the inner peripheral wall 12a, and the lower surface of the inner peripheral wall 12a and the lower surface of the elastic ring 21 are supported by an inward flange 14 attached to the inner surface of the suspended portion. Let The overall shape of the cap may be substantially the same as in FIG.

In the above-described embodiment, the cap peripheral wall is fitted to the outer surface of the mounting cylinder 3 of the vertical pump type container, but may be fitted to the outer surface of the mouth and neck of a normal container body. The inner wall 12a and the outer wall 12b of the cap can be formed of AS, ABS, PET, PBT, PEN, PCT, PCTA, PC, PS, PP, PE, ionomer, acrylic, metal, etc. PP, PE, PET, ABS, PVC, rubber (natural, NBR, isoprene, silicone, butyl, nitrile, urethane, etc.) can be used. Only the outer peripheral wall can be made of metal.
The wall thickness of the cap is about 4 mm to 25 mm.

  The inner peripheral wall 12a with the top wall may be different in color from the outer peripheral wall 12b of the upper and lower double-sided openings. In this way, the decoration effect of the cap can be further enhanced.

It is sectional drawing of 1st Embodiment this invention cap shown in a container fitting state. 1 is an exploded cross-sectional view of the lower portion of the cap. 1 is an enlarged cross-sectional view of the main part of the cap main member. 3 is a plan view of the main member. It is sectional drawing of the cap principal part shown in 2nd Embodiment. It is sectional drawing of the cap of FIG. 5 shown in a container fitting state.

Explanation of symbols

2 Container body 6 1st engagement protrusion
11 Cap body 12 Perimeter wall
12a Inner wall 12b Outer wall
14 Inward flange 15 Groove
16 1st gap 18 2nd gap
19 Second engagement cylinder 21 Elastic ring
22 Standing tube part 25 First outward flange
26 Second outward flange 27 Second engaging protrusion
31 Longitudinal groove 32 Notch
33 recess

Claims (3)

The inner peripheral wall 12a comprises a cap body 11 having a peripheral wall 12 formed of a double cylinder in which the outer peripheral wall 12b is fitted to the outer surface, and an elastic ring 21 tightly fitted into the peripheral wall 12. A part of the inner surface is exposed to the inner surface of the peripheral wall 12, a second engagement protrusion 27 projecting inward from the peripheral wall 12 is laterally provided to the exposed portion, and the concave groove 15 into which the elastic ring is fitted is formed on the inner peripheral wall. 12a, the inner surface and the lower surface open recess, the first engagement tube portion 17 suspended from the inner end of the upper surface of the recess, and the outer peripheral wall 12b extending downward from the inner peripheral wall 12a to the inner peripheral wall An inward flange 14 that protrudes inward while supporting the lower end, and a second engagement tube portion 19 that stands up with a gap between the flange inner end and the lower end of the first engagement tube portion 17. It is formed into a convex shape in the horizontal direction and the elastic ring is also fitted into the space. A cap characterized by being formed . The inner peripheral wall 12a comprises a cap body 11 having a peripheral wall 12 formed of a double cylinder in which the outer peripheral wall 12b is fitted to the outer surface, and an elastic ring 21 tightly fitted into the peripheral wall 12. A space in which a part of the inner surface is exposed to the inner surface of the peripheral wall 12, the second engagement protrusion 27 projecting inward of the peripheral wall 12 to the exposed portion, and the elastic ring 21 is fitted is formed in the inner peripheral wall 12 a. A lower end surface opening longitudinal groove 31 formed between both lower and inner surfaces of the lower ring, and the inner peripheral wall portion of the elastic ring 21 is intermittently cut to form an exposed portion of the inner peripheral wall surface of the elastic ring. A cap characterized in that the lower surface of the inner peripheral wall 12a and the lower surface of the elastic ring 21 are supported by an inward flange 14 projecting inwardly from the suspended outer peripheral wall portion. 2. The cap according to claim 1, wherein the elastic ring 21 has a longitudinal cross-sectional shape in which a recess 33 for releasing the outer surface is provided on the outer surface side of the elastic ring portion having at least the second engaging protrusion 27.

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