JP6716159B2 - Container cap - Google Patents

Description

TECHNICAL FIELD The present invention relates to a container cap that is attached to the mouth of a container and has a cover attached to the outer peripheral surface.

2. Description of the Related Art Conventionally, there is known a type in which a discharge cap having a discharge port is attached to the mouth of a container body that stores contents, and a decorative cover is further attached to the outer peripheral surface of the discharge cap. .. For example, in Patent Document 1, the safety of a manual sprayer in which the surroundings of a mounting cylinder 3 and a spraying head 5 that are screwed into the mouth and neck of a container body 1 that stores contents are covered with decorative metal plates 3a and 5a. A device is disclosed. With the decorative metal plates 3a and 5a, it is possible to easily decorate the outer peripheral surface of the discharge cap, which is one of the components of the manual sprayer, which is easily noticeable, so that the user can feel visually beautiful. You can Further, by covering the resin mounting cylinder 3 and the spray head 5 with the decorative metal plates 3a and 5a, the strength of the easily damaged portion can be reinforced.

Japanese Utility Model Publication No. 60-27467

By the way, in the container having the above decorative plate, for example, the cap may be a resin cap whose material cost is low, and only the cover for covering the cap may be formed of a metal plate or the like. However, when such dissimilar materials are fixed to each other with an adhesive, a difference in adhesive force occurs due to a difference in wettability between the adhesive and the adherend. For example, when a resin is used as the material of the cap portion and the cap portion is subjected to a temperature cycle or impact, peeling may occur between the resin cap and the adhesive, and the cover may drop off. It was

An object of the present invention is to solve such a problem, and an object thereof is to provide a container cap that can prevent the cover covering the cap from falling off.

The present invention is a container cap to be attached to a container body for containing contents,
A cap body attached to the mouth of the container body,
A cover for covering the cap body from the outer peripheral side,
At least one circumferential recess or circumferential projection extending in the circumferential direction is provided on either the outer circumferential surface of the cap body or the inner circumferential surface of the cover,
The cap body and the cover are made of different materials and are bonded by an adhesive ,
The adhesive force between one material of the cap body and the cover provided with the at least one circumferential concave portion or circumferential convex portion and the adhesive is the same with the other material of the cap body and the cover. It is a container cap characterized by being weaker in adhesive strength with an agent .

Further, it is preferable that at least one axial concave portion or axial convex portion extending in the axial direction is provided on either the outer peripheral surface of the cap body or the inner peripheral surface of the cover.

Further, one of the cap body and the cover is made of a resin material, and the circumferential concave portion or the circumferential convex portion is provided on one of the cap body and the cover made of a resin material. Preferably.

Further, it is preferable that the cap body is made of a resin material and the cover is made of a metal material.

According to the container cap of the present invention, it is possible to prevent the cover covering the cap from falling off.

It is a front partial sectional view showing the state where the container cap concerning one embodiment of the present invention was attached to the mouth of the container body. It is a front partial cross-sectional view of the (a) cover and the (b) cap main body which comprise the container cap which concerns on one Embodiment of this invention.

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

FIG. 1 shows a state in which a container cap 1 according to an embodiment of the present invention is attached to a container body 2 conforming thereto. The container cap 1 includes a cap body 10, a pump 20, a nozzle head 30, and a cover 50. In the present specification, claims, abstract and drawings, the side on which the nozzle head 30 described later is located is the upper side (upper side in FIG. 1), and the side on which the bottom 2f of the container body 2 is located is the lower side (FIG. (Lower side in 1). Further, in FIG. 1, the direction along the central axis O is the axial direction.

First, the container body 2 will be described. In the present embodiment, the container body 2 includes a mouth portion 2a provided at an upper end of the container to which a cap body 10 to be described later is attached, and a shoulder portion that extends downward from the lower end of the mouth portion 2a and extends to the body portion 2e. 2d, a cylindrical body 2e that extends downward from the shoulder 2d along the central axis O to form the accommodation space S, and a bottom 2f that closes the lower end of the body 2e. The upper end of the mouth 2a forms an upper opening 2c. Further, on the outer peripheral surface of the mouth portion 2a, a male screw portion 2b for fixing the cap body 10 described later by screw engagement is provided. The container body 2 can be formed of, for example, polypropylene (PP), polyethylene terephthalate (PET), or the like, but is not limited to this aspect, and may be formed of various other resins, metals, glass, and other materials. ..

Next, the cap body 10 that constitutes the container cap 1 will be described with reference to FIGS. 1 and 2B. The cap body 10 includes an outer peripheral wall 11 that surrounds the mouth portion 2a, and an inner peripheral surface of the outer peripheral wall 11 is formed with a female screw portion 11a corresponding to the male screw portion 2b of the mouth portion 2a. Further, a top wall 13 extending in the inner peripheral direction via a shoulder 11b is provided at the upper end of the outer peripheral wall 11. The upper peripheral wall 12 extending upward from the outer peripheral end of the top wall 13 is provided on the upper surface of the top wall 13, and a fitting groove 14 a opening downward is formed on the inner peripheral side of the upper peripheral wall 12 to form a cylinder of the pump 20. A pump receiving portion 14 that receives the upper end of 24 is provided upright. A rubber packing 19 is arranged as a separate component between the lower surface of the top wall 13 and the upper end surface of the mouth 2a to liquid-tightly seal the gap between the mouth 2a and the cap body 10.

A cover 50 having a shape along the outer shape of the cap body 10 is arranged on the outer peripheral side of the cap body 10 as shown in FIG. 1. The attachment of the cover 50 to the cap body 10 will be described later in detail with reference to FIGS.

The pump 20 is attached to the lower surface of the top wall 13 of the cap body 10 in a state where the lower end is suspended in the accommodation space S of the container body 2. The pump 20 is fixed to the cap body 10 by fitting the upper end of the cylinder 24 forming the outer shape of the pump 20 into the fitting groove 14 a and engaging the inner peripheral end of the packing 19 with the step portion of the cylinder 24. ing. A stem 22 is provided on the inner peripheral side of the cylinder 24 of the pump 20 so as to be vertically movable in an upwardly biased state. The upper end of the stem 22 is engaged with a step portion 34b provided on the inner peripheral wall of the guide cylinder 34, and the user pushes a nozzle head 30 described later to push down the stem 22 via the guide cylinder 34. To be By the vertical movement of the stem 22, the content in the accommodation space S of the container body 2 is sucked up and discharged from the nozzle 37 of the nozzle head 30 via the internal space of the guide cylinder 34.

As described above, the guide cylinder 34 connects the stem 22 of the pump 20 and the nozzle head 30 and guides the contents in the accommodation space S of the container body 2 to the nozzle 37 of the nozzle head 30. As shown in FIG. 1, a movable valve body 35 and a valve seat 34a on which the movable valve body 35 is seated are provided in the inner space of the guide cylinder 34. The movable valve body 35 moves upward due to the pressure from the pump 20 when the contents are discharged, and contacts the stopper 39 of the nozzle head 30. When the discharge is completed, the moving valve element 35 moves downward due to its own weight and is seated on the valve seat 34a. When the moving valve body 35 returns to the valve seat 34a, a space is generated on the nozzle 37 side, so that the contents remaining in the nozzle 37 can be moved to the guide tube 34 side (suck back function). ), dripping can be effectively suppressed.

The nozzle head 30 includes a nozzle 37 that laterally discharges the content guided from the guide tube 34. The upper end of the guide cylinder 34 is fitted to the inner peripheral surface of the vertical cylinder 31 that hangs downward from the nozzle 37. Further, on the outer peripheral side of the vertical cylinder 31, a hanging wall 32 that similarly hangs from the nozzle 37 is provided. When the user presses down the upper surface of the nozzle head 30, the stem 22 in the upwardly biased state is pushed down via the guide tube 34, and the contents inside the container body 2 are discharged from the nozzle opening 37a of the nozzle 37 to the outside. It When the pressing of the nozzle head 30 is stopped, the stem 22 biased upward moves up and returns to the original position.

The cover 50 covers the periphery of the cap body 10 and is fixed to the cap body 10. As shown in FIG. 1, the outer peripheral wall 11 of the cap body 10 is covered with the lower cover 51 of the cover 50, and the upper peripheral wall 12 is covered with the upper cover 55. Further, a step portion 53 that connects the upper cover 55 and the lower cover 51 is provided near the shoulder portion 11b of the cap body 10. A cover top wall 57 extending in the inner peripheral direction is provided at the upper end of the upper cover 55, and an inner peripheral end thereof forms an opening for receiving the guide cylinder 34 and the hanging wall 32. The cover 50 can be made of, for example, a thin metal plate such as an aluminum foil, but is not limited to this mode.

The cover 50 may function as a decorative plate that decorates the cap body 10, or may function as a protective material that protects the cap body 10 from impact, chemicals, and the like.

Next, a method of adhesively fixing the cover 50 to the cap body 10 of FIG. 1 will be described. 2A and 2B are partial front sectional views showing the detailed configurations of the cover 50 and the cap body 10, respectively. As shown in FIG. 2B, a vertical groove 18a extending in the vertical direction and a circumferential groove 18b extending in the circumferential direction are provided on the outer peripheral surface of the outer peripheral wall 11 of the cap body 10. In the present embodiment, the cover 50 and the cap body 10 are formed of an olefin resin such as aluminum foil and polypropylene, respectively, and a polyester adhesive is used as an adhesive for fixing the both. When the cover 50 is fixed to the cap body 10, first, the adhesive is widely applied to the outer peripheral surface of the outer peripheral wall 11 so that the adhesive also enters the vertical groove 18a and the peripheral groove 18b shown in FIG. 2B. .. Next, the cover 50 shown in FIG. 2A is fitted from above so as to cover the outer peripheral wall 11 of the cap body 10. At this time, the respective dimensions are controlled so that the outer peripheral surface of the outer peripheral wall 11 and the inner peripheral surface of the lower cover 51 form a clearance fit. That is, the adhesive widely enters the gap between the outer peripheral surface of the outer peripheral wall 11 and the inner peripheral surface of the lower cover 51, and further enters the vertical groove 18a and the peripheral groove 18b. Then, the fixing of the cover 50 and the cap body 10 is completed by curing the adhesive.

If the cap body 10 is subjected to impact, temperature change, or the like after the adhesive is hardened, peeling occurs at the boundary between the adhesive and polypropylene, which generally have weak adhesive strength. That is, in the present embodiment, peeling occurs at the boundary between the outer peripheral wall 11 of the cap body 10 and the adhesive. However, even if peeling occurs at the boundary between the outer peripheral wall 11 and the adhesive, the adhesive cured in the shape of the vertical groove 18a and the peripheral groove 18b fits into the vertical groove 18a and the peripheral groove 18b. The cover 50 does not come off from the cap body 10. The cover 50 is prevented from moving relative to the cap body 10 in the vertical direction and coming off due to the adhesive that has entered the circumferential groove 18b. Similarly, the adhesive that has entered the vertical groove 18 a prevents the cover 50 from rotating around the central axis O with respect to the cap body 10.

The adhesive is preferably adhered to both the cap body 10 and the cover 50, but at least the side of the cap body 10 or the cover 50 on which the vertical groove 18a or the circumferential groove 18b is not provided is adhered, Since the adhesive enters the vertical groove 18a and the peripheral groove 18b and functions like an undercart, it is possible to reliably prevent the cover 50 from coming off and rotating.

In the present embodiment, the outer peripheral surface of the outer peripheral wall 11 of the cap body 10 is provided with the vertical groove 18a parallel to the central axis O and the peripheral groove 18b perpendicular to the central axis O, respectively. Is not limited. If at least the circumferential groove 18b is provided, it is possible to prevent the cover 50 from moving in the vertical direction and coming off the cap body 10.

Further, in the present embodiment, the vertical groove 18a is configured to be parallel to the central axis O and the circumferential groove 18b is configured to be vertical to the central axis O, but the present invention is not limited to this mode. For example, even if the vertical groove 18a is inclined at an angle of 45 degrees or less from the state in which the vertical groove 18a is parallel to the central axis O, the cover 50 can be restrained from rotationally moving in the circumferential direction with respect to the cap body 10. That is, the vertical groove 18a extending in the axial direction may be inclined with respect to the central axis O at an angle within 45 degrees. Also, regarding the circumferential groove 18b, even if the circumferential groove 18b is inclined from the state perpendicular to the central axis O, the cover 50 may fall off the cap body 10 unless the circumferential groove 18b reaches the upper end or the lower end of the outer peripheral wall 11. There is no. Therefore, it is considered that the circumferential groove 18b has the effect of preventing the cover 50 from falling off within that range. That is, the circumferential groove 18b extending in the circumferential direction may be inclined from the state perpendicular to the central axis O within a range in which the circumferential groove 18b does not reach the upper end or the lower end of the outer peripheral wall 11.

Further, in the present embodiment, the vertical groove 18a and the circumferential groove 18b are configured to be provided in a plurality respectively, but the present invention is not limited to this aspect and at least one may be provided.

Further, in the present embodiment, the vertical groove 18a is provided as the recess extending in the axial direction and the circumferential groove 18b is provided as the recess extending in the circumferential direction, but the present invention is not limited to this aspect. Even when a protrusion extending in the axial direction is provided instead of the vertical groove 18a, the adhesive that has entered the area adjacent to the protrusion and hardened engages the protrusion to allow the cover 50 to move in the circumferential direction with respect to the cap body 10. It is possible to suppress the rotation. Similarly, even when a convex portion extending in the circumferential direction is provided instead of the circumferential groove 18b, the adhesive that enters the area adjacent to the convex portion and is hardened engages with the convex portion, so that the cover 50 causes the cap main body. It is possible to suppress relative movement in the vertical direction with respect to 10.

Further, in the present embodiment, the vertical groove 18a and the circumferential groove 18b are provided on the cap body 10 side, but the present invention is not limited to this aspect. For example, the cap body 10 may be formed of a metal material, the cover 50 may be formed of a highly decorative resin material, and the vertical groove 18a and the peripheral groove 18b may be provided on the inner peripheral surface of the cover 50. That is, it is preferable that the cap body 10 and the cover 50 are made of different materials, and the vertical groove 18a and the circumferential groove 18b are provided on the side of the cap body 10 and the cover 50 where the adhesive strength with the adhesive is low. preferable.

Further, in the present embodiment, the polyester-based adhesive is used as the adhesive, but the present invention is not limited to this mode. For example, the cover 50 is fixed by hot melt or the like containing a thermoplastic resin as a main component. May be.

As described above, according to the present embodiment, the circumferential groove 18b extending in the circumferential direction is provided on the outer peripheral surface of the cap body 10 mounted on the opening 2a of the container body 2, while the outer peripheral surface is different from the cap body 10. A cover 50 made of a material was used for covering and fixing by adhesion. Thereby, even if peeling occurs at the boundary between the outer peripheral surface of the cap body 10 and the adhesive, it is possible to prevent the adhesive cured in the peripheral groove 18b from engaging with the peripheral groove 18b and dropping the cover 50. You can

Further, according to the present embodiment, in addition to the circumferential groove 18b, the vertical groove 18a extending in the central axis O direction of the container body 2 is provided on the outer peripheral surface of the cap body 10. This can prevent the cover 50 from rotating in the circumferential direction with respect to the cap body 10.

Further, according to the present embodiment, the cap body 10 is made of a resin material, the cover 50 is made of a metal material, and the vertical groove 18a and the circumferential groove 18b are formed on the cap body 10 side. As a result, the adhesive strength between the metallic cover 50 and the adhesive can be kept high, while the boundary between the resin cap body 10 and the adhesive, which has low adhesive strength and is easy to peel off, is provided with a vertical groove for the adhesive. Since the relative movement is made difficult by engaging with the 18a and the circumferential groove 18b, it is possible to suppress the cover 50 from dropping and rotating.

Although the present invention has been described based on the drawings and the embodiments, it should be noted that those skilled in the art can easily make various variations and modifications based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each component can be rearranged so as not to logically contradict each other, and a plurality of components can be combined into one or divided. It should be understood that these are also included in the scope of the present invention.

According to the present invention, it is possible to provide the container cap 1 that can prevent the cover 50 that covers the cap body 10 from falling off.

DESCRIPTION OF SYMBOLS 1 Container cap 2 Container body 2a Mouth portion 2b Male screw portion 2c Upper opening 2d Shoulder portion 2e Body portion 2f Bottom portion 10 Cap body 11 Outer peripheral wall 11a Female screw portion 11b Shoulder portion 12 Upper peripheral wall 13 Top wall 14 Pump receiving portion 14a Fitting groove 18a Vertical groove (axial recess)
18b Circumferential groove (circumferential recess)
19 packing 20 pump 22 stem 24 cylinder 30 nozzle head 31 vertical cylinder 32 hanging wall 34 guide cylinder 34a valve seat 34b step portion 35 moving valve element 37 nozzle 37a nozzle opening 39 stopper 50 cover 51 lower cover 53 step portion 55 upper cover 57 Cover top wall O Central axis S Storage space

Claims (4)

A container cap to be attached to a container body for storing contents,
A cap body attached to the mouth of the container body,
A cover for covering the cap body from the outer peripheral side,
At least one circumferential recess or circumferential projection extending in the circumferential direction is provided on either the outer circumferential surface of the cap body or the inner circumferential surface of the cover,
The cap body and the cover are made of different materials and are bonded by an adhesive ,
The adhesive force between one material of the cap body and the cover provided with the at least one circumferential concave portion or circumferential convex portion and the adhesive is the same with the other material of the cap body and the cover. A container cap characterized by being weaker in adhesive strength with the agent . The container cap according to claim 1, wherein at least one axial concave portion or axial convex portion extending in the axial direction is provided on either the outer peripheral surface of the cap body or the inner peripheral surface of the cover. .. One of the cap body and the cover is formed of a resin material, and the circumferential recessed portion or the circumferential projection is provided on one of the cap body and the cover formed of a resin material. The cap for a container according to claim 1 or 2. The container cap according to claim 3, wherein the cap body is made of a resin material, and the cover is made of a metal material.

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