JP2019119460A - Cap with sealing member - Google Patents

Abstract

To provide a cap with a sealing member that prevents unwanted breakage caused when a male mold is forcibly released during molding.SOLUTION: The present invention relates to a cap with a sealing member that comprises: an inner cylinder part 13 provided downward from a reverse surface of a head part 11; and a cylindrical sealing part 14 connected through a thin groove-like weakened part 15 for separation provided circumferentially at a lower end of a side wall 12 of the head part 11. The sealing part 14 has a weakened part 16 formed spirally of a thin part, an opening part 18 which penetrates the sealing part 14 in a plate thickness direction is provided between an upper end of the weakened part 16 and the weakened part 15 for separation, and a lock projection part 19 is provided circumferentially on an inner peripheral surface 14B of the sealing part 14 at a position avoiding the opening part 18.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a cap with a sealing member for closing the opening of a bottle body, and more particularly to a cap with a sealing member which can be integrally molded of a synthetic resin material.

As prior art related to the cap with a sealing member according to the present invention, Patent Document 1 below describes a stopper for a bottle including an inner stopper attached to the mouth portion and a side portion covering the mouth portion. .
The stopper for a bottle described in Patent Document 1 includes a notched portion 21 provided on the side portion 20 upward from the lower end portion, an orbiting portion 23a that orbits along the outer periphery of the side portion 20, and the orbiting portion 23a. A thin-walled portion 23 formed alternately and continuously with an inclined portion 23b formed upward, and a separated thin-walled portion 15 orbiting along the outer periphery of the side portion 20 at the boundary between the head 12 and the side portion 20 And a gap provided in the engaging portion 24 corresponding to the position where the engaging portion 24 and the thin portion 23 are provided so as to be provided on the inner side surface of the side portion 20 and engaged with the annular engaging portion A2 of the bottle A. And 25 so that the outline of the edge 14 of the head 12 is formed to be larger than the outline of the bottle opening A1.
In opening the stopper for a bottle, when the picking piece 22 is picked up with a finger and pulled up in the circumferential direction, the thin portion 23 (the circumferential portion 23a, the inclined portion 23b) continuously formed from the cutting portion 21 and the separated thin portion 15 breaks, the inner plug 10 and the side 20 are separated, and the inner plug 10 is exposed.

JP 2017-197196 A

Since the stopper for a bottle shown in the prior art described in Patent Document 1 is made of synthetic resin, the manufacturing method thereof is that after injection and molding of a molten resin in a pair of male and female molds, It is common to use an injection molding method for releasing the mold.
However, the stopper for a bottle is provided with an engaging portion 24 which protrudes in the inner diameter direction from the inner peripheral surface of the side wall 21 and engages with the annular engaging portion A2 of the bottle A. Since this engaging portion 24 is formed by a recess provided in the male mold, it is necessary to form the engaging portion 24 on the inner peripheral surface of the side wall 21 by forcibly removing the male mold at the time of mold release. When the mold is forcibly removed, the side portion 20 is deformed so as to expand in the outer diameter direction, so there is a problem that unnecessary breakage occurs in the inclined portion 23b of the thin portion 23 following the separated thin portion 15.

  An object of the present invention is to create a cap with a sealing member that prevents unnecessary breakage caused when the male die is forcibly pulled out during molding, in order to solve the above-mentioned problems in the prior art.

Among means for solving the above problems, the main means of the present invention is
A seal comprising an inner cylindrical portion provided to the lower surface of the head and a cylindrical sealing portion provided in series via a thin groove-like separating weakening portion provided on the lower end of the side wall of the head. A cap with members,
In the sealing portion, a weakening portion formed of a thin portion is formed in a spiral shape, and an opening which penetrates the sealing portion in the thickness direction is provided between the upper end of the weakening portion and the separation weakening portion
A locking projection is provided on the inner circumferential surface of the sealing portion and at a position avoiding the opening.
In the main means of the present invention, the male mold is forcedly removed at the time of molding by forming an opening which penetrates the sealing part in the thickness direction between the upper end of the weakening part for removing the sealing part and the separation weakening part. It is possible to prevent the occurrence of unnecessary breakage at the same time.

Further, another means of the present invention is the above-mentioned main means added with a means that the locking convex portion is formed in a circumferentially divided state.
According to the above means, a passage for discharging the internal air can be secured between the divided locking convex portion and the locking convex portion, so that the internal air can be discharged efficiently. Become.

Further, another means of the present invention is obtained by adding a means that the opening is disposed vertically to the separation weakening portion to any of the above means.
By the above means, unnecessary breakage can be prevented in the mold release, and breakage of the separation weakening portion can be facilitated at the time of opening.

Further, another means of the present invention is obtained by adding a means that a notch is formed between the lower end of the weakened portion and the lower end of the sealing portion to any of the above-described means.
In the above-mentioned means, since the end of the unsealing piece can be easily pinched through the notch, the opening operation using the unsealing piece can be easily performed.

Further, according to another means of the present invention, in addition to the means described above, the means is formed such that convex ribs are formed at predetermined intervals along the circumferential direction on the outer peripheral surface on the upper side of the inner cylinder portion. It is a thing.
According to the above means, compared to the case where the convex portions are arranged in a ring shape, the synthetic resin material can be reduced to reduce the manufacturing cost (material cost).

In the cap with a sealing member according to the present invention, since the portion conventionally formed by the thin-walled portion is formed by the opening, when unnecessary removal is performed at the time of mold release, unnecessary breakage in the sealing portion can be prevented. At the time of opening, it is easy to break the weakening part for separation and the opening operation can be simplified.

It is a front view showing a cap with a sealing member as an example of the present invention. It is a top view of a cap with a sealing member. It is a bottom view of a cap with a sealing member. It is sectional drawing of the cap with a sealing member corresponded to the IV-IV line | wire of FIG. It is sectional drawing which shows the cap with a sealing member, and the male mold | die for shaping | molding. It is sectional drawing which shows a mode that a cap with a sealing member is pierced to a bottle neck part. It is a front view of the cap with a sealing member which shows a mode at the time of opening.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a front view showing a cap with a sealing member as an embodiment of the present invention, FIG. 2 is a plan view of the cap with a sealing member, FIG. 3 is a bottom view of the cap with a sealing member, and FIG. It is sectional drawing of the cap with a sealing member corresponded to FIG. FIG. 5 is a cross-sectional view showing a cap with a sealing member and a male mold for molding, FIG. 6 is a cross-sectional view showing a state in which a cap with a sealing member is tapped at the bottle opening, and FIG. It is a front view of a cap with a sealing member. 5 and 6 are cross-sectional views corresponding to the line V-V in FIG.

  The cap with a sealing member of the present invention is attached to the mouth 41 of a glass bottle 40 such as a single bottle (1800 ml bottle) or a No. 4 bottle (720 ml bottle) containing liquors such as sake and shochu, for example. It is a stopper member (cap) for sealing and sealing the inside of the bottle body 40, and is integrally formed of, for example, a synthetic resin material such as polypropylene (PP).

  As shown in FIGS. 1 to 4, the cap 10 with a sealing member mainly includes a head 11 having a thick disk shape, an inner cylindrical portion 13 provided to hang from the lower surface of the head 11, and a head 11. And a cylindrical sealing portion 14 connected to the lower end of the side wall 12. A non-slip knurl 12a is engraved on the outer peripheral surface of the side wall 12 over the entire circumference. Further, a separation weakening portion 15 formed in a thin-walled V-groove shape is circumferentially provided between the lower end of the side wall 12 and the upper end of the sealing portion 14, and the separation weakening portion 15 is broken. , And the sealing portion 14 can be separated from the head 11. In addition, when the cap 10 with a sealing member attached to the bottle body 40 is opened, it is necessary to remove the sealing portion 14 without fail. Therefore, the sealing portion 14 has a function to prevent unauthorized opening of the bottle body 40. .

The sealing portion 14 is formed with a weakened portion 16, a notch 17 and an opening 18. The weakening portion 16 shown in the present embodiment spirals around a thin portion formed substantially V-shaped in cross section with respect to the outer peripheral surface 14A of the sealing portion 14 from the lower end 16a toward the upper end 16b in one or more spirals. After this, the upper end 16 b of the weakened portion 16 is connected to the opening 18. The weakening portion 16 may be configured to connect the upper end 16b of the thin-walled portion continuing from the lower end 16a to the opening 18 before going around.
The notch 17 is formed by notching a part of the lower end of the sealing portion 14 and is provided between the lower end 16 a of the weakened portion 16 and the lower end 14 a of the sealing portion. The opening 18 is formed by a longitudinally extending through hole formed by penetrating the sealing portion 14 in the thickness direction, and the separation weakening portion is located at a position between the upper end 16b of the weakening portion 16 and the separation weakening portion 15 The upper end 16b of the weakening portion 16 and the weakening portion 15 for separation are connected to each other. Then, the sealing portion 14 is cut along the weakened portion 16, and a portion formed in a substantially trapezoidal shape when planarly expanding from the notch portion 17 to the opening portion 18 is an open piece portion 20.

The shape of the opening 18 is not limited to the longitudinal shape in plan view, and the size of the vertical dimension of the opening may be at least larger than the height dimension of the locking projection 19. Furthermore, the opening 18 may be a through hole disposed in an inclined manner with respect to the separation weakening portion 15.
When the opening 18 is formed as a through hole in this way, for example, when cleaning the cap 10 with a sealing member, water or cleaning solution comes in and out through the opening 18, so the cap 10 with a sealing member is easily made. It is possible to wash

  Further, as shown in FIG. 4, on the inner circumferential surface 14 B of the sealing portion 14, the locking convex portion 19 protruding in a convex shape in cross section toward the inner diameter direction is also located at a position other than the weakened portion 16. It is placed around the avoided position. In the present embodiment shown in FIGS. 3 and 4, the locking convex portion 19 is divided into four in the circumferential direction, and an opening is formed between a pair of the locking convex portion 19 and the locking convex portion 19 adjacent to each other. Although the portion 18 is disposed, the locking convex portion 19 may be formed at a position avoiding the weakened portion 16 and the opening 18, and the number of divisions of the locking convex portion 19 is at least one or more. Just do it.

The inner cylindrical portion 13 is formed to have the same size as or a slightly larger size than the inner diameter of the bottle opening 41, and the inner cylindrical portion 13 is inserted into the bottle opening 41 and the inner periphery of the bottle opening 41. Close contact with the surface enables the bottle body 40 to be sealed. In this sense, the inner cylindrical portion 13 functions as a plug body which substantially seals the bottle opening 41.
As shown in FIG. 3 or FIG. 6 etc., when the cap 10 with a sealing member is attached to the bottle opening 41 on the outer peripheral surface on the upper side of the inner cylinder 13, a plurality of abuts on the upper end of the bottle opening 41 The convex rib 13a is intermittently protruded in the circumferential direction. As described above, in the cap 10 with a sealing member of the present invention, the plurality of convex ribs 13a are intermittently arranged to reduce the synthetic resin material and reduce the manufacturing cost (material cost) as compared with the case of annular arrangement. It has become possible.

As shown in FIG. 5, the cap 10 with a sealing member configured as described above is manufactured by injecting and molding a molten resin between a male die 30 and a female die not shown, and then releasing it.
The male mold 30 is formed with a recess 31 corresponding to the engagement protrusion 19, and the engagement protrusion 19 and the recess 31 are engaged immediately after molding. When the male mold 30 is removed at the time of mold release, even if the sealing portion 14 is deformed so as to expand in the outer diameter direction, the opening 18 following the weakening portion 15 for separation is originally formed by a through hole. It is impossible for the opening 18 to break.

  Moreover, in order to attach the cap 10 with a sealing member to the bottle opening 41, the plugging machine which is not shown in figure is used. As shown in FIG. 6, after inserting the upper end of the bottle neck portion 41 between the inner cylinder portion 13 and the sealing portion 14 and applying a downward plugging force F to the sealing member-equipped cap 10, relative By fitting the engagement convex portion 19 to the engagement recess 42 of the bottle opening 41, the bottle opening 41 can be closed. At the time of plugging, air passes through between the engagement convex portion 19 and the engagement convex portion 19 which are divided in the circumferential direction, and also escapes through the opening 18. Air can be easily discharged.

  In order to open the cap 10 with a sealing member, for example, a toe etc. is inserted into the notch 17 and the open piece 20 is slightly raised to pick up the end 21, and this end 21 is used as a starting point toward the opening 18 Rotate to pull up (see FIG. 7). As a result, breakage progresses in the weakened portion 16 from the notch 17 toward the opening 18, that is, from the lower end 16 a to the upper end 16 b of the weakened portion 16, and further breakage occurs in the separation weakened portion 15 following the opening 18. It can be done.

  At the time of breakage, it is necessary to tear the weakened portion 16 consisting of a thin portion between the notch 17 and the opening 18, and it is necessary to tear with a relatively large force against the resistance of the weakened portion 16. Between the upper end 16 b of the weakening portion 16 and the weakening portion 15 for separation, an opening 18 which opens perpendicularly to the weakening portion 15 for separation is provided. Therefore, when pulling up the open piece 20 is continuously performed, the resistance becomes zero when reaching the upper end 16 b of the weakened part 16, but the opening which is the start point of the subsequent breaking of the weakened part 15 for separation Since a large force acts instantaneously on the upper end 18 a of 18, the separation weakening portion 15 can be easily broken.

  By breaking the separating weakening portion 15, it is possible to separate and remove the sealing portion 14 constituting the open piece portion 20 from the lower end of the side wall 12 of the head portion 11. Therefore, after removal, the head 11 is pulled out while grasping the side wall 12, and the contents (bottle etc.) in the bottle body 40 can be poured out by pulling out the inner cylindrical portion 13 sealing the bottle opening 41. It becomes possible. Further, by inserting the inner cylindrical portion 13 constituting the plug body into the bottle port 41, the bottle port 41 can be plugged again.

As mentioned above, although the structure of this invention and its effect were demonstrated along the Example, embodiment of this invention is not limited to the said Example.
For example, although the case of the glass bottle was shown and demonstrated as the bottle body 40 in the said Example, the bottle body 40 may be formed with other materials, such as metal, synthetic resin, and ceramics.

  In the above embodiment, the weakening portion 16 is described as being formed on the outer peripheral surface 14A of the sealing portion 14. However, as long as it has a configuration in which the cross section is substantially V groove shape (thin groove shape), The weakening portion 16 may be formed on the inner circumferential surface 14 B of the sealing portion 14.

  In the present invention, the application development in the field of the cap provided with the sealing member can be expanded in a wider area.

10: Cap 11 with sealing member: Head 12: Side wall 12a: Knurl 13: Inner cylinder 13a: Inner rib 13: Sealing portion 14A: Sealing portion outer peripheral surface 14B: Sealing portion inner peripheral surface 14a: Sealing portion lower end 15: separation weakening part 16: weakening part 16a: lower end of weakening part 16b: upper end of weakening part 17: notch 18: opening 18a: upper end of opening 19: locking convex 20: open piece 21: open One end 30 of the part: Male 31: Recess 40: Bottle body 41: Sperm 42: Engaging recess F: Tapping force

Claims (5)

An inner cylindrical portion (13) provided on the lower surface of the head (11) and a thin groove-like separating weakening portion (15) provided on the lower end of the side wall (12) of the head (11) A cap with a sealing member, comprising a cylindrical sealing portion (14) connected in series via
A weakening portion (16) consisting of a thin-walled portion is formed spirally in the sealing portion (14), and the sealing is performed between the upper end (16b) of the weakening portion (16) and the weakening portion for separation (15). An opening (18) is provided which penetrates the portion (14) in the thickness direction,
A cap with a sealing member characterized in that a locking convex portion (19) is provided around the inner peripheral surface (14B) of the sealing portion (14) and at a position avoiding the opening (18).   The cap with a sealing member according to claim 1, wherein the locking projection (19) is formed in a circumferentially divided state.   A cap with a sealing member according to claim 1 or 2, wherein the opening (18) is arranged perpendicularly to the separating weakening portion (15).   The sealing member according to any one of claims 1 to 3, wherein a notch (17) is formed between the lower end (16a) of the weakened portion (16) and the lower end (14a) of the sealing portion (14). With cap.   The cap with a sealing member according to any one of claims 1 to 4, wherein convex ribs (13a) are formed at predetermined intervals along the circumferential direction on the outer peripheral surface on the upper side of the inner cylindrical portion (13). .

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