JP2015063342A - Cap with inside plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cap with an inside plug which enables easy plug opening and achieves improved seal performance when the cap is closed after the plug opening.SOLUTION: A cap with an inside plug includes: an inside plug 20 which is attached to a mouth part 11 of a container body 10 and has a spout cylinder 25 for spouting a content; and a cap 30 covering the spout cylinder 25 from the outer side. The inside plug 20 includes a plug body 26 which has a cylindrical wall 26a and is integrally connected with the spout cylinder 25 through a thin rupture part 27 extending from an inner peripheral surface of the spout cylinder 25. The cap 30 includes: a sealing wall 35 which contacts with the inner peripheral surface of the spout cylinder 25 and seals the spout cylinder 25; and a protrusion part 36. A first tooth part 26d which is formed on an outer peripheral surface of the cylindrical wall 26a and a second tooth part 35a formed on an inner peripheral surface of the sealing wall 35 form a ratchet mechanism. A clearance, which allows the plug body 26 to move along a central axis C of the spout cylinder 25, is provided between a first engagement protruding part 26e formed on an inner peripheral surface of the cylindrical wall 26a and a second engagement protruding part 36a which is formed on an outer peripheral surface of the protrusion part 36 and engages with the first engagement protruding part 26e.

Description

  The present invention relates to a cap with an inner stopper to be attached to a container containing dressing or the like as contents.

  Conventionally, containers that contain food seasonings such as dressings and soy sauce are virgin type that are opened by tearing the closed wall by pulling at the mouth to keep the container sealed until just before use. It is common to wear a plug.

  However, since the pull ring is greatly different depending on the user, it may be broken at an unintended portion and the container cannot be opened. For this reason, various inside plugs that can be opened without causing pull ring have been studied (for example, see Patent Document 1).

  In the cap 1 shown in FIG. 1 of Patent Document 1, the overcap 3 is tightened so that the separation portion 4 is separated from the main body portion 20 and the inner plug 2 is opened. Then, the separation part 4 after opening is held by the overcap 3 and functions as an inner sealing plug that closes the opening OP.

JP 2011-225220 A

  However, when opening the container, the cap 1 must be removed by rotating the overcap once in the tightening direction (screwing direction) and then rotating in the reverse direction (screwing direction). This is troublesome for the user and is difficult to understand. In addition, after the opening, if the contents remain in the vicinity of the opening of the cylindrical portion 6 by repeatedly pouring out the contents, it cannot be said that the sealing performance is sufficient only by the separation portion 4, and there is room for improvement. was there.

  Therefore, an object of the present invention is to provide a cap with an inside plug that is easy to open and has improved sealing performance when the cap is closed after opening.

The present invention has been made to solve the above-mentioned problems, and the cap with an inner cap of the present invention is attached to the mouth portion of a container main body for storing the contents, and is a dispensing cylinder for dispensing the contents. An inner plug having
A cap that is detachably attached to the inner plug via a screw portion and covers the pouring tube from the outside,
The inner plug has a plug body integrally connected via a thin-walled rupture portion extending from the inner peripheral surface of the extraction cylinder while having a cylindrical wall extending along the extraction cylinder.
The cap hangs down from the inner surface of the top wall of the cap, and a sealing wall that seals the dispensing cylinder in contact with the inner peripheral surface of the dispensing cylinder in a state where the cap is attached to the inner plug. And a protrusion that hangs down from the inner surface of the top wall of the cap on the inside of the cylindrical wall,
The first tooth portion formed on the outer peripheral surface of the cylindrical wall and the second tooth portion formed on the inner peripheral surface of the sealing wall are disengaged when the cap is screwed. Configure a ratchet mechanism that engages when detaching and breaks the thin-walled rupture part,
A first engaging convex portion formed on the inner peripheral surface of the cylindrical wall, and a second engaging convex portion that is formed on the outer peripheral surface of the protruding portion and engages with the first engaging protruding portion. A gap that allows movement of the plug body along the central axis of the dispensing cylinder is provided between them.

  Further, the cap with an inner cap of the present invention is, in a cross-sectional view passing through the central axis of the dispensing tube, a contour line representing the lower surface of the thinned portion and a contour line representing the inner peripheral surface of the dispensing tube. It is preferable that the angle formed therebetween is in the range of 40 to 80 °.

  In the cap with an inner cap according to the present invention, the dispensing tube may include a cylindrical base portion and a lip that curves radially outwardly above the base portion, and the thin portion is provided on the base portion. preferable.

  Further, the cap with an inner cap according to the present invention is such that the pouring tube includes a cylindrical base portion and a lip that curves radially outward above the base portion, and the sealing wall is formed of the pouring tube. It is preferable to contact the base.

Further, in the cap with an inner plug of the present invention, the inner plug includes a cylindrical peripheral wall surrounding the outer periphery of the mouth portion,
A fitting tube portion is provided at the lower end portion of the peripheral wall through a thin connecting portion,
On the inner peripheral surface of the fitting tube portion, a fitting convex portion linked to a fitting protrusion formed on the outer peripheral surface of the mouth portion of the container body is provided,
It is preferable that a breakage induction portion for inducing breakage of the connecting portion when the inner plug is removed from the mouth portion is formed in a part of the fitting tube portion in the circumferential direction.

Further, the cap with an inner plug of the present invention, the inner plug has a cylindrical peripheral wall surrounding the outer periphery of the mouth portion, and has a first claw portion provided on the outer peripheral surface of the peripheral wall,
The cap has a cylindrical outer peripheral wall that surrounds the outer periphery of the peripheral wall, and has a cylindrical opening discrimination ring connected via a connecting piece in the vicinity of the lower end of the outer peripheral wall,
A second claw portion is provided on the inner peripheral surface of the opening determination ring,
By the screwing operation of the cap at the time of opening, the first claw portion and the second claw portion are engaged to break the connecting piece before the thin broken portion is broken, and the cap and the cap It is preferable to separate the opening discrimination ring.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the cap with an inside plug which is easy to open and has improved sealing performance when the cap is closed after opening.

It is a principal part expanded sectional view which shows one Embodiment of the cap with an inside stopper according to this invention in the state with which the opening part of the container was mounted | worn. (A) is the elements on larger scale of the cap with an inside stopper shown in FIG. 1, (b) is the A section enlarged view of Fig.2 (a). FIG. 2 is a half cross-sectional view in side view showing the inner plug shown in FIG. 1 alone. FIG. 3A is a plan view and FIG. 3B is a bottom view of the inner plug shown in FIG. It is BB sectional drawing of the cap with an inside stopper shown to Fig.2 (a). It is a principal part expanded sectional view which shows other embodiment of the cap with an inside stopper according to this invention in the state with which the opening part of the container was mounted | worn. FIG. 7 is a half sectional view in a side view showing the inner plug shown in FIG. 6 alone. (A) is a side view of the cap shown in FIG. 6, and (b) is a half sectional view of FIG. 8 (a). It is FF sectional drawing of the cap with an inside stopper shown in FIG. It is HH sectional drawing of the cap with an inside stopper shown in FIG. (A)-(d) is a fragmentary sectional view which shows the shape of the thin-wall fracture | rupture part in other embodiment of the cap with an inside stopper according to this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a cap with an inner stopper according to the present invention. The cap 1 with an inner plug is composed of an inner plug 20 and a cap 30 both made of a synthetic resin. After the cap 30 is screwed (screwed) to the inner plug 20, a container containing the contents. It is attached to the main body 10 with a stopper.

  The container main body 10 includes a cylindrical mouth portion 11, and although not shown in the drawings, a storage space M for contents is formed at the body portion and the bottom portion connected to the mouth portion 11. The outer peripheral surface of the mouth portion 11 is provided with a fitting protrusion 12 that holds and holds the inner plug 20. In addition, a container knurled portion 13 is provided above the fitting protrusion 12, and a convex portion extending in the vertical direction is provided continuously along the circumferential direction of the mouth portion 11.

  The inner plug 20 includes a cylindrical peripheral wall 21 that surrounds the outer periphery of the mouth portion 11. The upper wall 22 extends radially inward from the upper end of the peripheral wall 21, and rises upward from the inner peripheral edge of the upper wall 22. The annular wall 23, the step portion 24 extending radially inward from the upper end of the annular wall 23, and the pouring cylinder 25 rising upward from the inner peripheral edge of the step portion 24 are integrally connected. The dispensing cylinder 25 forms a dispensing path for contents from the storage space M when mounted on the container body 10.

  As shown in FIGS. 1 and 2A, the dispensing cylinder 25 has a cylindrical base portion 25a and a lip 25b that curves radially outwardly above the base portion 25a. As shown in FIGS. 2 (a) and 2 (b), a thin-walled rupture portion 27 is connected to the inner side in the radial direction of the base portion 25 a of the dispensing cylinder 25, and the plug body 26 is integrated through the thin-walled rupture portion 27. It is connected. Here, as shown in FIG. 2 (b), in this example, the thin fracture portion 27 extends upward from the plug body 26 toward the dispensing cylinder 25, and represents a contour line 27 a representing the lower surface of the thin fracture portion 27. And the outline 25c showing the inner peripheral surface of the extraction | pouring cylinder 25 becomes a shape which makes angle (theta).

  As shown in FIG. 2A, the plug body 26 has a cylindrical tubular wall 26a extending along the dispensing cylinder 25 and a bottom wall 26b that closes the lower end of the tubular wall 26a. On the radially outer side of the bottom wall 26b, a flange portion 26c having a thickness that gradually decreases toward the radially outer side is formed, and the thin-walled fracture portion 27 is connected to the tip of the flange portion 26c. A first tooth portion 26d is provided on the outer peripheral surface of the cylindrical wall 26a, and a first engagement convex portion 26e is formed on the inner peripheral surface. Further, as shown in FIG. 4B, cross-shaped ribs 29 are formed on the bottom surface of the plug body 26, that is, the bottom surface of the bottom wall 26 b, by four concave portions 28.

  Here, as shown in FIG.1 and FIG.3, the fitting cylinder part 21b is provided in the lower end part of the surrounding wall 21 via the thin-shaped connection part 21a, and the inner peripheral surface of the fitting cylinder part 21b is provided. In addition, a fitting convex portion 21c linked to the fitting protrusion 12 is provided. In the present embodiment, as shown in FIG. 4A, the connecting portion 21a is partially cut off in the circumferential direction to form an opening 21d. Further, as shown in FIG. 3, the fitting tube portion 21b has a shape in which a part in the circumferential direction is cut out from the upper side (hereinafter referred to as a cutout portion 21e), and is below the cutout portion 21e. The side is a thin-walled planned break portion 21f. Moreover, the part of the one side adjacent to this notch part 21e becomes the knob | pick part 21g. The knob portion 21g is a portion that becomes a finger hook when the inner plug 20 is removed from the mouth portion 11 for separation and disposal after all the contents are poured out. By pulling the knob 21g and pulling it in the circumferential direction, the breakable portion 21f and the connecting portion 21a are broken, and the fitting tube portion 21b can be removed. Therefore, the inner plug 20 can be easily removed from the mouth portion 11. In this example, the cutout portion 21e and the thin-walled planned break portion 21f function as a breakage induction portion that induces breakage of the connecting portion 21a. As shown in the plan view of FIG. 4A, in this embodiment, a non-slip portion 21h formed by arranging a plurality of convex shapes in the circumferential direction is provided inside the knob portion 21g in the radial direction.

  As shown in FIGS. 1 and 3, the inner peripheral surface of the peripheral wall 21 is provided with an inner stopper knurl portion 21 i provided corresponding to the container knurl portion 13, and the lower surface of the upper wall 22 is provided with the mouth portion 11. An annular seal wall 22a is provided in liquid-tight contact with the inner peripheral surface. Further, a male screw portion 23a is provided on the outer peripheral surface of the annular wall 23, and a plurality of reinforcing ribs 23b connected to the lower surface of the step portion 24 are provided on the inner peripheral surface of the annular wall 23 at intervals in the circumferential direction. Provided.

  As shown in FIG. 1, the cap 30 includes a cylindrical outer peripheral wall 31 that surrounds the entire inner plug 20 including the dispensing cylinder 25, and a top wall 32 that closes the upper end of the outer peripheral wall 31. The top wall 32 is provided with an outer cylindrical wall 33 that hangs around the annular wall 23, and an inner threaded surface 33 a corresponding to the male threaded portion 23 a is provided on the inner peripheral surface of the outer cylindrical wall 33. . Further, between the outer peripheral wall 31 and the outer cylindrical wall 33, plate-like ribs 34 provided at intervals in the circumferential direction are provided to reinforce the outer peripheral wall 31 and the outer cylindrical wall 33. In the present embodiment, six are provided in the circumferential direction with equal arrangement, but the present invention is not limited to this.

  The cap 30 is located on the radially inner side of the outer cylindrical wall 33, a cylindrical sealing wall 35 depending from the inner surface 32 a of the top wall 32, and further on the radially inner side of the sealing wall 35. And a cylindrical projection 36 that hangs down from the inner surface 32a. The sealing wall 35 seals the dispensing tube 25 in a liquid-tight contact with the inner peripheral surface of the base portion 25a of the dispensing tube 25 in a state where the cap 30 is attached to the inner plug 20. The inner peripheral surface of the sealing wall 35 has a second tooth portion 35a that constitutes a ratchet mechanism together with the first tooth portion 26d. On the outer peripheral surface of the protruding portion 36, a second engaging convex portion 36a that engages with the first engaging convex portion 26e is formed. As shown in FIG. 1, there is a gap G in the direction along the central axis C of the dispensing cylinder 25 between the first engaging convex portion 26e and the second engaging convex portion 36a. The body 26 can move within a predetermined range along the central axis C of the dispensing cylinder 25 with respect to the cap 30. In this example, the central axis C of the dispensing cylinder 25 coincides with the central axes of the container body 10, the inner plug 20, the cap 30 and the parts constituting them.

  Here, a ratchet mechanism constituted by the first tooth portion 26d and the second tooth portion 35a will be described with reference to FIG. 5 showing a BB cross section of FIG. In the illustrated example, the first tooth portion 26d is composed of 12 unit blades formed on the outer peripheral surface of the cylindrical wall 26a, and the second tooth portion 35a is 6 formed on the inner peripheral surface of the sealing wall 35. The unit blades are made of a single blade, but the shape and number of the unit blades are not limited to the illustrated example, and can be determined as appropriate.

  When the cap 30 is screwed to the inner plug 20, the sealing wall 35 rotates in the direction of the arrow D with respect to the plug body 26, and the first tooth portion 26d and the second tooth portion 35a are not engaged. Therefore, the plug body 26 does not rotate and can be easily operated. On the other hand, at the time of screwing, the sealing wall 35 rotates in the direction of arrow E with respect to the plug body 26, and the first tooth portion 26d and the second tooth portion 35a are engaged, and the force applied to the cap 30 is increased. It works in the direction in which the plug 26 is rotated. When a predetermined amount or more of force is applied in the unscrewing direction, the thin-walled rupture portion 27 is broken and the dispensing tube 25 is opened.

  The cap with cap 1 is used by first screwing the cap 30 onto the cap 20 and then plugging it into the container body 10. As the cap 30 is tightened into the inner plug 20, the projection 36 moves vertically downward and starts to enter the inside of the cylindrical wall 26 a of the plug body 26. If the tightening of the cap 30 is continued, the second engaging convex portion 36a comes into contact with the first engaging convex portion 26e, and when further tightened, the second engaging convex portion 26e gets over the first engaging convex portion 26e and is disposed below. The second engaging convex portion 36a can be engaged with the first engaging convex portion 26e. And as shown in FIG. 1, the 2nd engagement convex part 36a is the 1st engagement convex part 26e by tightening the cap 30 until the outer side cylindrical wall 33 contact | abuts to the upper wall 22 of the inside plug 20. As shown in FIG. It will be located below a predetermined distance. Then, the accommodation space M is sealed by plugging the cap 1 with the inner stopper that has been tightened into the mouth portion 11 of the container body 10.

  When the cap 30 is tightened, a jig having a concave shape to be fitted to the cross-shaped rib 29 provided on the lower surface of the plug body 26 is prepared. It is preferable to insert it from above, to support it from below, and to hold it against rotation. As a result, when the cap 30 is tightened, the plug 26 does not rotate with respect to the dispensing tube 25, so that there is no possibility that the thin broken portion 27 will crack.

  When opening the container equipped with the cap 1 with the inner cap, the ratchet mechanism is activated by rotating the cap 30 in the loosening direction (screwing direction), that is, the first tooth portion 26d and the second tooth portion 26d. The cylindrical portion 26a is engaged with the tooth portion 35a and receives a force in the rotational direction, the shearing force acts on the thin-walled rupture portion 27 and breaks, and the dispensing tube 25 is opened. At this time, the plug 26 separated from the inner plug 20 is held by the cap 30. In addition, after opening the plug, the plug 26 can move in the direction along the central axis of the dispensing cylinder 25 with respect to the cap 30. The movable range is between a position where the first engaging convex portion 26 e and the second engaging convex portion 36 a are engaged and a position where the flange portion 26 c is in contact with the lower end of the sealing wall 35.

  In the cap 1 with an inner stopper having the above-described configuration, when the cap 30 is closed after opening, the stopper body 26 can be moved up and down within a predetermined range. The contents attached to the dispensing cylinder 25 can be scraped off toward the accommodation space M. This prevents the contents from adhering between the sealing wall 35 that comes into liquid-tight contact with the inner peripheral surface of the pouring cylinder 25 and the inner peripheral surface of the pouring cylinder 25. The sealing performance by 35 can be improved and the outflow of the contents at the time of a fall etc. can be prevented.

  Moreover, the cap 1 with the middle stopper of the present embodiment can be opened simply by rotating the cap 30 in the loosening direction by adopting a ratchet mechanism, and can be easily opened. In addition, by adopting a ratchet mechanism, it is easy to transmit the force applied to the cap 30 to the plug body 26 when opening the plug, so that the plug can be easily opened even if the thin broken portion 27 is designed to be relatively thick. By making the thin-walled rupture portion 27 relatively thick, the flow of resin in the mold is improved during molding, and the moldability is improved.

  In addition, the cap 1 with an inner cap according to the present embodiment prevents water droplets from accumulating on the connecting portion 21a when the contents are filled with high temperature and cooling water is sprayed by the opening 21d formed in the connecting portion 21a. be able to.

  Here, the cap with cap 1 of the present embodiment has an angle between a contour line 27a representing the lower surface of the thin-walled fracture portion 27 shown in FIG. 2B and a contour line 25c representing the inner peripheral surface of the dispensing cylinder 25. θ is preferably in the range of 40 to 80 °, and more preferably, the angle θ is 60 °. As a result, the thin-walled rupture portion 27 can be easily broken to facilitate opening. Further, since the thin broken portion 27 can be easily broken, the thickness of the thin broken portion 27 can be set relatively large, and the moldability of the inner plug 20 can be improved.

  Further, in the cap 1 with an inner cap according to the present embodiment, the dispensing tube 25 includes a cylindrical base portion 25a and a lip 25b that curves radially outwardly above the base portion 25a, and the thin-walled fracture portion 27 is It is preferable to be provided in the base 25a. According to this, the lip 25b improves the drainage of the contents when the contents are poured out, and the contents adhered to the inner peripheral surface of the base portion 25a are scraped off by the plug body 26 to further improve the sealing performance by the sealing wall 35. be able to.

  Moreover, in the cap 1 with an inner cap according to the present embodiment, it is preferable that the sealing wall 35 abuts on the base portion 25 a of the dispensing tube 25. According to this, the sealing performance by the sealing wall 35 can be further enhanced as compared with the case where the lip 25b abuts.

  Moreover, in the cap 1 with an inner stopper of the present embodiment, the distance h1 between the lower end of the sealing wall 35 and the flange portion 26c of the stopper 26 is such that the upper end of the cylindrical wall 26a and the inner surface of the top wall 30 It is preferable that the distance h2 to 32a or less. Thus, after opening, the flange portion 26c of the plug body 26 and the lower end of the sealing wall 35 can come into contact with each other, and when the container is shaken with the cap 30 tightened, the contents are separated from the plug body 26. It is possible to suppress the gap between the cap 30 and the seal performance from being deteriorated.

  Hereinafter, another embodiment of the present invention will be described with reference to FIGS. In addition, about the structure which is the same as that of previous embodiment, or corresponds, it represents with the same code | symbol.

  The cap with cap 100 of this embodiment shown in FIG. 6 is composed of a cap 120 and a cap 130 both made of synthetic resin, and the cap 130 is attached to the cap 120 as in the previous embodiment. After screwing, it is attached to the container body 10 containing the contents by a stopper.

  Similarly to the previous embodiment, the inner plug 120 includes a cylindrical peripheral wall 21 that surrounds the outer periphery of the mouth portion 11, and includes an upper wall 22 and an upper wall 22 that extend radially inward from the upper end of the peripheral wall 21. An annular wall 23 standing upward from the inner peripheral edge, a step portion 24 extending radially inward from the upper end of the annular wall 23, and a pouring cylinder 25 standing upward from the inner peripheral edge of the step portion 24. They are connected together. A thin-walled rupture portion 27 is connected to the inner side in the radial direction of the base portion 25 a of the dispensing cylinder 25, and the plug body 26 is integrally connected through the thin-walled rupture portion 27. In the present embodiment, the plug body 26 has a diameter-enlarged portion 26f that is expanded radially outward at the lower end portion of the cylindrical wall 26a. On the radially outer side of the bottom wall 26b, a flange portion 26c having a thickness that gradually decreases toward the radially outer side is formed, and the thin-walled fracture portion 27 is connected to the tip of the flange portion 26c. As shown in FIG. 7, the inner plug 120 includes a first claw portion 21 j provided on the outer peripheral surface of the peripheral wall 21. In the present embodiment, the six first claw portions 21j are provided in the circumferential direction in a uniform arrangement, but the present invention is not limited to this.

  Further, the fitting tube portion 21b of the inner plug 120 can be removed by breaking the connecting portion 21a starting from a planned break portion constituted by the notch portion 21k and the thin knob portion 21m. Thereby, the inner stopper 120 can be easily removed from the mouth portion 11 of the container body 10 for separation and disposal.

  8A is a side view of the cap 130, and FIG. 8B is a half sectional view of FIG. 8A. The cap 130 includes a cylindrical outer peripheral wall 31 that surrounds the dispensing tube 25 and a top wall 32 that closes the upper end of the outer peripheral wall 31 as illustrated. A female screw portion 31a corresponding to the male screw portion 23a of the inner plug 120 is provided on the inner peripheral surface of the outer peripheral wall 31, and the outer peripheral surface of the outer peripheral wall 31 extends in the direction in which the central axis C extends to prevent slippage. A number of grooves 31b that play a role are formed.

  The cap 130 includes a lower wall 37 extending radially outward from the lower end of the outer peripheral wall 31, a lower annular wall 38 depending from the outer peripheral edge of the lower wall 37, and a plurality of caps from the lower end of the lower annular wall 38. And a cylindrical unsealing discriminating ring 40 connected through a thin connecting piece 39. In the present embodiment, the four connecting pieces 39 are provided in the circumferential direction in a uniform arrangement, but the present invention is not limited to these. A second claw portion 41 that engages with the first claw portion 21j is provided on the inner peripheral surface of the unsealing discrimination ring 40.

  Here, FIG. 9 is a view showing the inner plug 120 and the cap 130 in the FF cross section of FIG. 6. As shown in the drawing, in the present embodiment, six second claw portions 41 are provided in the circumferential direction in a uniform arrangement, but the present invention is not limited to this. Further, the first claw portion 21j and the second claw portion 41 are inclined on one side so as not to be engaged when the cap 130 is screwed onto the inner plug 120 (rotates in the direction of arrow D). The other side is a surface perpendicular to the rotational direction so as to be engaged when unscrewing (rotating in the direction of arrow E). In the present embodiment, when the cap 130 is screwed onto the inner plug 120, the first claw portion 21j and the second claw portion 41 are separated by a distance that does not engage, and the cap with the inner plug is provided. When 100 is plugged into the container body 10, the peripheral wall 21 slightly increases in diameter, and comes close to a distance at which the first claw portion 21 j and the second claw portion 41 can be engaged. In the present embodiment, the first claw portion 21j and the second claw portion 41 are engaged when the cap 130 is rotated about 15 ° in the screwing direction from the unopened state.

  On the upper end surface of the unsealing discrimination ring 40, a second butting portion 40a and a second pressing slope portion that face the first butting portion 38a and the first pressing slope portion 38b provided on the lower end surface of the lower annular wall 38, respectively. 40b is provided. A projecting portion 38 c that projects toward the upper end surface of the opening determination ring 40 is provided on the lower end surface of the lower annular wall 38. The protruding portion 38c comes into contact with the upper end surface of the opening determination ring 40 when the lower end surface of the lower annular wall 38 and the upper end surface of the opening determination ring 40 are close to each other due to, for example, an impact at the time of dropping. Thereby, the distance between the lower end surface of the lower annular wall 38 and the upper end surface of the opening determination ring 40 is appropriately secured, and the connecting piece 39 is prevented from being accidentally broken. In the present embodiment, the four protruding portions 38c are provided in the circumferential direction in a uniform arrangement, but the present invention is not limited to this.

  Similarly to the previous embodiment, the cap 130 is located on the radially inner side of the outer peripheral wall 31 and the cylindrical sealing wall 35 depending from the inner surface 32a of the top wall 32, and further on the radially inner side of the sealing wall 35. And a cylindrical protrusion 36 that hangs down from the inner surface 32 a of the top wall 32. The inner peripheral surface of the sealing wall 35 has a second tooth portion 35 a that constitutes a ratchet mechanism together with the first tooth portion 26 d provided on the outer peripheral surface of the cylindrical wall 26 a of the inner plug 120.

  Here, with reference to FIG. 10 which shows the HH cross section of FIG. 6, the ratchet mechanism comprised by the 1st tooth | gear part 26d and the 2nd tooth | gear part 35a is demonstrated. As shown in FIG. 9, the first tooth portion 26d constituting the ratchet mechanism in the present embodiment is composed of six unit blades formed on the outer peripheral surface of the cylindrical wall 26a, and the second tooth portion 35a is sealed. It consists of six unit blades formed on the inner peripheral surface of the stop wall 35. In the present embodiment, when the cap 130 is rotated in the screwing direction for the first time, the first tooth portion 26d and the second tooth portion 35a are engaged with each other when the cap 130 is rotated about 30 ° from the unopened state. Has been.

  The cap with cap 100 is used by first screwing the cap 130 onto the cap 120 and then plugging it into the container body 10 as in the previous embodiment. When opening the container equipped with the cap 100 with the inner cap, the cap 30 is rotated in the loosening direction so that the first claw portion 21j and the second claw portion 41 are first engaged to open the opening discrimination ring 40. The rotation of is stopped. When the cap is further rotated, the first pressing slope portion 38b approaches the stopped second pressing slope portion 40b, and further rotates while the first pressing slope portion 38b is in contact with the second pressing slope portion 40b. If it does, the 1st press slope part 38b will push down the 2nd press slope part 40b below. At this time, the connecting piece 39 is broken by receiving a force in the rotational direction and the vertical direction, and the opening determination ring 40 is separated from the cap 130. The separated opening discrimination ring 40 is disposed on the fitting cylinder portion 21b of the inner plug 120.

  When the ratchet mechanism is further rotated in the screwing direction, that is, the first tooth portion 26d and the second tooth portion 35a are engaged, and the thin-walled rupture portion 27 is broken as in the previous embodiment, The dispensing cylinder 25 is opened. After opening the plug, the plug body 26 is held by the cap 130 and can move in the direction along the central axis C of the dispensing cylinder 25 with respect to the cap 130.

  In addition to the same effects as the previous embodiment, the cap 100 with the inner stopper having the above-described configuration can easily determine from the appearance that the container has been opened by separating the opening determination ring 40. Is possible. In addition, since the connection piece 39 is broken when the cap is opened, it is possible to prevent the cap 130 from being unintentionally opened by touching the cap 130. In addition, according to the cap 100 with the inner plug of the present embodiment, the first claw portion 21j and the second claw portion 41 are engaged when the cap 130 is first rotated in the screwing direction from the unopened state. By adjusting the rotation angle and the rotation angle until the first tooth portion 26d and the second tooth portion 35a are engaged, the timing of separation of the opening determination ring 40 and the breakage of the thin-walled breakage portion 27 is adjusted. be able to. Moreover, by having the enlarged diameter part 26f, it can suppress more effectively that the content penetrates between the plug body 26 and the cap 130 after opening, and can prevent the deterioration of the sealing performance.

  Here, the result of having evaluated the change of the fracture | rupture performance by the shape of the thin fracture | rupture part 27 by strength analysis is demonstrated below.

(Performance evaluation 1)
As a first evaluation condition, an angle θ (see FIG. 2) formed between the contour line 27 a representing the lower surface of the thin-walled fracture portion 27 and the contour line 25 c representing the inner peripheral surface of the dispensing cylinder 25 is changed. The fracture performance was evaluated. In the evaluation, the maximum value of the stress generated in the thin-walled rupture portion 27 when the plug body 26 is pulled up 1 mm above the dispensing tube 25 from a state where no force is applied was obtained by strength analysis. The results are as shown in Table 1. As the stress value shown in Table 1 is larger, the stress is more likely to be concentrated, and the thin-walled rupture portion 27 is easily broken at the time of opening.

  From the results of Table 1, it can be seen that when the angle θ is 40 to 80 °, particularly when the angle θ is 60 °, the thin-walled fracture portion 27 can be easily broken, that is, can be easily opened. Further, by making the angle θ appropriate, it is possible to make the structure easy to break even if the thickness of the thin-walled fracture portion 27 is relatively thick, so that the moldability can be improved.

(Performance evaluation 2)
As the second evaluation condition, as shown in FIGS. 11A to 11D, the breaking position was evaluated by changing the connection position of the thin fracture portion 27 to the flange 26 c in the vertical direction. The evaluation method is the same as the performance evaluation 1, and the results are as shown in Table 2. As the stress value shown in Table 2 is larger, the stress is more likely to be concentrated, and the thin fracture portion 27 at the time of opening is easily broken.

  From the results shown in Table 2, it can be seen that the thin-walled fracture portion 27 is easy to break, that is, is easy to open in the order of the center lower portion, the center portion, the lower end portion, and the upper end portion of the flange portion 26c.

  In addition, when attaching the cap 1 with the inner cap to the container main body 10, it is configured to be attached with a stopper as in this embodiment, rather than applying a screw configuration that is opposite to the screw direction of the cap 30. Although it is preferable, if necessary, it is also possible to apply a commonly used right-hand thread to the cap 30 and to make the screw structure of the cap with cap 1 and the container body 10 a left-hand thread.

DESCRIPTION OF SYMBOLS 1,100 Cap with inner plug 10 Container body 11 Mouth part 12 Fitting protrusion 13 Container knurled part 20, 120 Inner plug 21 Peripheral wall 21a Connection part 21b Fitting cylinder part 21c Fitting convex part 21d Opening 21e Notch part 21f Planned break Part 21g Knob part 21h Non-slip part 21i Inner plug knurl part 21j First claw part 22 Upper wall 22a Seal wall 23 Annular wall 23a Male thread part 23b Reinforcement rib 24 Step part 25 Extraction cylinder 25a Base 25b Lip 26 Plug 26a Tubular Wall 26b Bottom wall 26c Flange part 26d 1st tooth part 26e 1st engagement convex part 26f Expanded diameter part 27 Thin-walled fracture part 28 Concave part 29 Rib 30, 130 Cap 31 Outer peripheral wall 32 Top wall 32a Inner surface 33 Outer cylindrical wall 34 Plate Shaped rib 35 sealing wall 35a 2nd tooth part 36 protrusion part 36a 2nd engagement convex part 37 lower wall 3 8 Lower annular wall 39 Connecting piece 40 Opening discriminating ring 41 2nd claw part M Housing space C Center axis of sealing wall

Claims (6)

An inner plug that is attached to the mouth of the container main body that contains the contents and has a dispensing tube for dispensing the contents;
A cap that is detachably attached to the inner plug via a screw portion and covers the pouring tube from the outside,
The inner plug has a plug body integrally connected via a thin-walled rupture portion extending from the inner peripheral surface of the extraction cylinder while having a cylindrical wall extending along the extraction cylinder.
The cap hangs down from the inner surface of the top wall of the cap, and a sealing wall that seals the dispensing cylinder in contact with the inner peripheral surface of the dispensing cylinder in a state where the cap is attached to the inner plug. And a protrusion that hangs down from the inner surface of the top wall of the cap on the inside of the cylindrical wall,
The first tooth portion formed on the outer peripheral surface of the cylindrical wall and the second tooth portion formed on the inner peripheral surface of the sealing wall are disengaged when the cap is screwed. Configure a ratchet mechanism that engages when detaching and breaks the thin-walled rupture part,
A first engaging convex portion formed on the inner peripheral surface of the cylindrical wall, and a second engaging convex portion formed on the outer peripheral surface of the protruding portion and engaged with the first engaging convex portion. A cap with an inner plug, characterized in that a gap allowing movement of the plug body along the central axis of the dispensing cylinder is provided therebetween.   In a cross-sectional view passing through the central axis of the dispensing cylinder, an angle formed between a contour line representing the lower surface of the thinned fracture portion and a contour line representing the inner peripheral surface of the dispensing cylinder is 40 to 80 °. The cap with a stopper according to claim 1, which is within the range.   The cap with an inner plug according to claim 1 or 2, wherein the dispensing tube includes a base portion that is cylindrical and a lip that is curved radially outward above the base portion, and the thin portion is provided in the base portion. .   The said extraction | pouring pipe | tube is provided with the base which becomes a cylindrical shape, and the lip | curve which curves outside in the radial direction above this base, and the said sealing wall contact | abuts the said base of the said extraction | pouring cylinder. A cap with an inner stopper according to any one of the above. The inner plug includes a cylindrical peripheral wall that surrounds the outer periphery of the mouth,
A fitting tube portion is provided at the lower end portion of the peripheral wall through a thin connecting portion,
On the inner peripheral surface of the fitting tube portion, a fitting convex portion linked to a fitting protrusion formed on the outer peripheral surface of the mouth portion of the container body is provided,
The break guide part which induces breakage of the connecting part when the inner plug is removed from the mouth part is formed in a part in the circumferential direction of the fitting tube part. Cap with inner stopper as described in the item. The inner plug has a cylindrical peripheral wall surrounding the outer periphery of the mouth portion, and has a first claw portion provided on the outer peripheral surface of the peripheral wall,
The cap has a cylindrical outer peripheral wall that surrounds the outer periphery of the peripheral wall, and has a cylindrical opening discrimination ring connected via a connecting piece in the vicinity of the lower end of the outer peripheral wall,
A second claw portion is provided on the inner peripheral surface of the opening determination ring,
By the screwing operation of the cap at the time of opening, the first claw portion and the second claw portion are engaged to break the connecting piece before the thin broken portion is broken, and the cap and the cap The cap with an inner stopper according to any one of claims 1 to 5, wherein the cap is separated from the opening discrimination ring.

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