JP7345968B2 - container cap - Google Patents

Description

The present invention relates to a container cap.

For example, a patent document discloses a cap for a container in which the contents are discharged from the discharge port of the cap only when the bottle-shaped container body is squeezed (pressing operation), and when the squeeze is stopped, the contents are drained moderately and the discharge port is not contaminated. Caps with slit valves, such as those described in 1, are known.

JP2019-64680A

The slit valve used in the above-mentioned cap is usually made of a rubber-based material (eg, silicone rubber, elastomer-based resin). However, since rubber-based materials are more expensive than general (that is, non-rubber-based) resin materials, it is difficult to reduce costs.

The present invention aims to solve these problems, and its purpose is to provide a container cap that can reduce costs while maintaining the function of the slit valve.

A container cap according to a first aspect of the present invention has a bottle shape having a mouth, a body, and a bottom, and is attached to a container body that forms a storage space for contents, and has a capped shape. a cap body comprising a top wall including a cylindrical portion having a shape and an opening communicating with the housing space; and a mounting tube formed integrally with the top wall and attached to the mouth portion ; and a slit valve made of a film material welded to the upper end surface of the cylindrical part , which closes the opening and is opened by positive pressure in the accommodation space to discharge the contents in the accommodation space. The cap body is characterized in that it has a baffle plate integrally formed with the top wall so as to face the slit valve from the side of the accommodation space.

A container cap according to a second aspect of the present invention is a container cap that has a bottle shape having a mouth, a body, and a bottom, and is attached to a container body that forms a storage space for contents, and has a capped shape. The cap body includes a cylindrical part having a shape and an opening communicating with the housing space, and is composed of a cap body attached to the mouth part and a film material welded to the cap body, closing the opening and opening the housing space. and a slit valve that is opened by positive pressure inside to discharge the contents in the accommodation space , and the cap body is connected to the middle frame member main body to which the slit valve is welded, and from the side of the accommodation space. A baffle plate integrally formed with the middle frame member main body so as to face the slit valve, and a main body member having an outer cylinder forming an outer peripheral side portion of a cylindrical portion and to which the middle frame member main body is attached. The middle frame member, which is composed of the middle frame member main body and the baffle plate, is attached to the main body member to form an inner circumference side portion of the cylindrical portion, and forms an inner circumference side portion of the outer cylinder. A lower step portion whose diameter expands downward is provided in a portion below the upper step portion in the surface, and a step portion provided on the outer peripheral surface of the middle frame member is in contact with the lower step portion, An inward convex portion that protrudes radially inward is provided in a portion of the inner circumferential surface of the outer cylinder below the lower step portion, and the inward convex portion includes a portion of the outer circumferential surface of the middle frame member. It is characterized in that an outwardly directed convex portion provided at and projecting outward in the radial direction is locked so as to restrict downward movement.

Preferably, in the container cap of the present invention, in the above configuration, the slit valve has a cross-shaped slit, and the baffle plate is arranged to face a central portion of the slit.

According to the present invention, it is possible to provide a container cap that can reduce costs while maintaining the function of the slit valve.

FIG. 1 is a top view showing a container cap according to a first embodiment of the present invention. FIG. 2 is a longitudinal cross-sectional view of the container cap shown in FIG. 1. FIG. It is a top view which shows the cap for containers based on the 2nd Embodiment of this invention. 4 is a longitudinal cross-sectional view of the container cap shown in FIG. 3. FIG. It is a longitudinal cross-sectional view which shows the cap for containers based on the 3rd Embodiment of this invention. It is a figure which shows the integral member of the inner frame member of the container cap shown in FIG. 5, and a slit valve, (a) is a top view, (b) is a partial side sectional view, and (c) is a bottom view. It is a longitudinal cross-sectional view which shows the cap for containers based on the 4th Embodiment of this invention. It is a figure which shows the integral member of the inner frame member of the container cap shown in FIG. 7, and a slit valve, (a) is a top view, (b) is a partial side sectional view, and (c) is a bottom view.

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

A container cap 1 according to a first embodiment of the present invention shown in FIGS. 1 and 2 has a bottle shape having a mouth, a body, and a bottom, and is attached to a container body that forms a space for accommodating contents. It is something that Although a high viscosity liquid such as a thick sauce is used as the content, the content is not limited thereto, and a low viscosity liquid or the like may be used. Moreover, the contents are not limited to foods such as sauces, but may be various products such as cosmetics.

The container cap 1 has a capped cylindrical shape and has an opening 10 that communicates with a storage space, a cap body 11 that is attached to the mouth, and a lid 12 that closes the opening 10. The lid body 12 is rotatably connected to the cap body 11 via a hinge 13. Note that the lid body 12 is not limited to being connected to the cap body 11 via the hinge 13, but may be connected to the cap body 11 via, for example, a threaded portion. Alternatively, a configuration may be adopted in which the lid 12 is not provided.

The cap body 11 has a cylindrical mounting tube 14 that is attached to the mouth, and a top wall 15 that continues to the upper end of the mounting tube 14. The mounting tube 14 is configured to be attached to the mouth via a threaded portion, but is not limited to this, and may be configured to be attached to the mouth via a convex portion for plugging, for example. Good too. The ceiling wall 15 has a substantially conical cylindrical portion 16 that forms the opening 10 . Note that the cylindrical portion 16 is not limited to a conical shape. Further, the cap body 11 is not limited to having the cylindrical portion 16 as long as it has the opening 10.

In addition, in this application, the vertical direction means the direction along the central axis of the mouth when the container cap 1 is attached to the mouth of the container body, and the upward means the direction from the body toward the mouth. , downward means the opposite direction.

The cap body 11, hinge 13, and lid body 12 are integrally made of polypropylene resin. The cap body 11, the hinge 13, and the lid body 12 are not limited to being made of polypropylene resin, but may be made of a general resin other than polypropylene resin.

The container cap 1 also includes a slit valve 17 that closes the opening 10 and is opened by positive pressure in the storage space to discharge the contents in the storage space. The slit valve 17 has a cross-shaped slit 18 when viewed from above, and by opening the slit 18, the contents can be discharged. Note that the slits 18 are not limited to a cross shape, and may be, for example, a radial shape other than a cross shape or a single character shape.

The lid body 12 has a dome-shaped protrusion 12a on the lower surface when the lid is closed, and the slit 18 is slightly opened by pressing the center part of the slit 18 of the slit valve 17 with the protrusion 12a when the lid is closed. This allows it to be maintained in a stable condition. Therefore, clogging of the slit 18 due to solidification of the contents can be suppressed, and the contents can be smoothly discharged during squeezing. A cylindrical engagement tube 12b that engages with the upper end of the cylindrical portion 16 when the lid is closed is provided on the radially outer side of the convex portion 12a of the lid 12.

The slit valve 17 is made of a planar film material welded to the upper end surface of the cylindrical portion 16 of the cap body 11. However, the slit valve 17 is not limited to being made of a flat film material, but may be made of a curved film material, such as an upwardly convex surface projecting upwardly or a downwardly convex surface projecting downwardly. Note that the slit valve 17 is not limited to one that is welded to the upper end surface of the cylindrical portion 16.

The film material of the slit valve 17 has a two-layer structure, including an outer layer made of low-density polyethylene resin and an inner layer made of polypropylene resin, and an adhesive layer made of adhesive polyolefin resin between these two layers. have. Note that the resin constituting the inner layer is not limited to polypropylene resin, and may be within a range that can be welded to the member to which the inner layer is welded (the cap body 11 in this embodiment, and the middle frame member 11a in the third and fourth embodiments described later). can be selected as appropriate. Further, the resin constituting the outer layer is not limited to those mentioned above, and can be selected from resins having appropriate hardness and the like. The resin constituting the adhesive layer is not limited to those mentioned above, and can be appropriately selected depending on the materials of the inner layer and the outer layer. Furthermore, the film material is not limited to a laminated structure, but may have a single layer structure.

The thickness of the film material is preferably 0.1 to 0.15 mm, but can be set as appropriate depending on the viscosity of the contents.

The film material of the slit valve 17 is integrally formed with the cap body 11, the hinge 13, and the lid body 12 by insert molding using the film material as an in-mold material. In other words, the film material is formed in a welded state to the cap body 11 by insert molding. Note that the welding of the slit valve 17 is not limited to insert molding, and may be, for example, ultrasonic welding.

The slits 18 may be provided in the film material before insert molding, may be formed by cutting the film material within the insert molding mold, or may be formed by cutting the film material outside the mold after insert molding. You may.

According to the slit valve 17 as described above, it is possible to perform the function as a slit valve without using expensive rubber-based materials.

Next, a container cap 1 according to a second embodiment of the present invention will be described. The container cap 1 according to the present embodiment shown in FIGS. 3 to 4 has a different structure from the container cap 1 according to the first embodiment of the present invention in that the cap body 11 has a baffle plate 19, and other points. The configuration is similar in that respect. Note that in FIGS. 3 and 4, members corresponding to those shown in the first embodiment of the present invention are given the same reference numerals.

In this embodiment, the cap body 11 has a baffle plate 19 arranged on the side of the accommodation space so as to face the slit valve 17 . The cap body 11 also has a plurality of connecting pieces 20 that are arranged at intervals on the outer peripheral edge of the baffle plate 19 and connect the baffle plate 19 to the cylindrical portion 16 that is the member forming the opening 10. . In addition, in FIG. 3, only one connecting piece 20 is given a reference numeral. The baffle plate 19 is arranged to face the center of the slit 18, that is, directly below the center of the slit 18.

Therefore, when the contents flow toward the slit valve 17 due to their own weight until the container is tilted and squeezed to discharge the contents, the flow can be suppressed by the baffle plate 19. Therefore, it is possible to suppress the occurrence of liquid dripping due to the slit 18 being pushed open by the flow of the contents. Here, since the baffle plate 19 is arranged to face the center of the slit 18, it can efficiently receive the flow of contents toward the center of the slit 18, which is easily pushed open. It is possible to effectively suppress the opening of.

Next, a container cap 1 according to a third embodiment of the present invention will be described. The container cap 1 according to the present embodiment shown in FIGS. 5 and 6 is the container cap according to the first embodiment of the present invention in that the cap body 11 is composed of an inner frame member 11a and a main body member 11b. The configuration is different from 1, but the configuration is similar in other respects. Note that in FIGS. 5 and 6, members corresponding to those shown in the first embodiment of the present invention are given the same reference numerals.

In this embodiment, the cap main body 11 is composed of an inner frame member 11a having an opening 10 and a slit valve 17 welded thereto, and a main body member 11b to which the inner frame member 11a is attached. The middle frame member 11a has a cylindrical shape, and a slit valve 17 is welded to the upper end surface of the middle frame member 11a.

The middle frame member 11a is made of polypropylene resin. The middle frame member 11a is not limited to being made of polypropylene resin, but may be made of a general resin other than polypropylene resin. The film material of the slit valve 17 is integrally formed with the middle frame member 11a by insert molding using the film material as an in-mold material. In other words, the film material is formed by insert molding so as to be welded to the middle frame member 11a. Note that the welding of the slit valve 17 is not limited to insert molding, and may be, for example, ultrasonic welding.

The middle frame member 11a forms an inner peripheral side portion of the cylindrical portion 16 by being attached to the main body member 11b. The main body member 11b has an outer cylinder 21 that forms an outer peripheral side portion of the cylindrical portion 16. An annular upper step 22 whose diameter increases downward is provided at the upper end of the inner peripheral surface of the outer cylinder 21 . The upper surface of the slit valve 17 is in contact with the upper step portion 22 . Further, in a portion of the inner circumferential surface of the outer cylinder 21 below the upper step portion 22, an annular lower step portion 23 whose diameter increases downward is provided. An annular step 24 provided on the outer peripheral surface of the middle frame member 11 a is in contact with the lower step 23 . An annular inward convex portion 25 that protrudes radially inward is provided in a portion of the inner peripheral surface of the outer cylinder 21 below the lower step portion 23 . An annular outward protrusion 26 provided on the outer peripheral surface of the middle frame member 11a and protruding radially outward is locked to the inward protrusion 25 so as to be restricted from moving downward.

A positioning rib 27 extending in the axial direction (vertical direction) is provided on the inner peripheral surface of the middle frame member 11a. By fitting the positioning rib 27 into the jig used to attach the middle frame member 11a to the main body member 11b, the circumferential direction of the slit 18 can be kept constant when the middle frame member 11a is attached to the main body member 11b. can do. Therefore, when the contents are discharged through the slit 18, the discharge direction and discharge form can be prevented from varying between products.

In this embodiment, the slit valve 17 is welded to the middle frame member 11a, so a plurality of types of integrated members of the middle frame member 11a and the slit valve 17 are prepared according to the viscosity of the contents, etc. It becomes possible to use them properly in the process of assembling the cap 1. Therefore, further cost reduction can be achieved.

Next, a container cap 1 according to a fourth embodiment of the present invention will be described. The container cap 1 according to the present embodiment shown in FIGS. 7 and 8 is different in structure from the container cap 1 according to the third embodiment of the present invention in that the middle frame member 11a has a baffle plate 19, In other respects, they have the same configuration. Note that in FIGS. 7 and 8, members corresponding to those shown in the third embodiment of the present invention are given the same reference numerals.

In this embodiment, the middle frame member 11a has a baffle plate 19 arranged on the accommodation space side so as to face the slit valve 17. The middle frame member 11a also includes a plurality of connecting pieces 20 that are arranged at intervals on the outer peripheral edge of the baffle plate 19 and connect the baffle plate 19 to the middle frame member main body 28, which is a member forming the opening 10. ing. Note that in FIGS. 8(a) and 8(c), only one connecting piece 20 is designated by a reference numeral. The baffle plate 19 is arranged to face the center of the slit 18, that is, directly below the center of the slit 18.

According to this embodiment, the same effects as in the case of the container cap 1 according to the third embodiment of the present invention can be obtained. Further, when the contents flow toward the slit valve 17 due to their own weight before the container is tilted and squeezed to discharge the contents, the flow can be suppressed by the baffle plate 19. Therefore, it is possible to suppress the occurrence of liquid dripping due to the slit 18 being pushed open by the flow of the contents. Here, since the baffle plate 19 is arranged to face the center of the slit 18, it can efficiently receive the flow of contents toward the center of the slit 18, which is easily pushed open. It is possible to effectively suppress the opening of.

It goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the spirit thereof.

1 Container cap 10 Opening 11 Cap body 11a Middle frame member 11b Main body member 12 Lid body 12a Convex portion 12b Engagement tube 13 Hinge 14 Mounting tube 15 Top wall 16 Cylindrical portion 17 Slit valve 18 Slit 19 Baffle plate 20 Connection piece 21 Outer cylinder 22 Upper step 23 Lower step 24 Step 25 Inward convex portion 26 Outward convex portion 27 Positioning rib 28 Middle frame member main body

Claims (3)

A bottle-shaped container cap having a mouth, a body, and a bottom, and attached to a container body forming a storage space for contents, the cap comprising:
a cap body comprising a top wall including a cylindrical portion having a cylindrical shape and an opening communicating with the housing space; and a mounting tube formed integrally with the top wall and attached to the mouth portion;
a slit made of a film material welded to the upper end surface of the cylindrical part of the ceiling wall, which closes the opening and is opened by positive pressure in the accommodation space to discharge the contents in the accommodation space; has a valve;
A cap for a container, wherein the cap body has a baffle plate integrally formed with the top wall so as to face the slit valve from the side of the accommodation space. A bottle-shaped container cap having a mouth, a body, and a bottom, and attached to a container body forming a storage space for contents, the cap comprising:
a cap body that is attached to the mouth portion and includes a cylindrical portion that has a crested cylindrical shape and an opening that communicates with the housing space;
a slit valve made of a film material welded to the cap body, which closes the opening and is opened by positive pressure in the accommodation space to discharge the contents in the accommodation space;
The cap body includes a middle frame member main body to which the slit valve is welded, a baffle plate integrally formed with the middle frame member main body so as to face the slit valve from the housing space side , and a cylindrical portion. a main body member having an outer cylinder forming an outer peripheral side portion and to which the middle frame member main body is attached ;
The middle frame member composed of the middle frame member main body and the baffle plate forms an inner peripheral side portion of the cylindrical part by being attached to the main body member,
A lower step portion whose diameter increases downward is provided in a portion below the upper step portion on the inner circumferential surface of the outer cylinder,
A step provided on the outer peripheral surface of the middle frame member is in contact with the lower step,
An inward convex portion that protrudes radially inward is provided in a portion of the inner circumferential surface of the outer cylinder below the lower step portion,
An outward protrusion provided on the outer circumferential surface of the middle frame member and protruding radially outward is locked to the inward protrusion so as to restrict downward movement. Container cap. The container cap according to claim 1 or 2 , wherein the slit valve has a cross-shaped slit, and the baffle plate is arranged to face a central portion of the slit.

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