JP2009292498A - Spout structure of container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an spout structure capable of surely breaking a predetermined breaking part of a sealing band when a screw cap equipped with a ratchet type sealing band is opened. <P>SOLUTION: The screw cap 13 is fitted to a spout member 12 constituting an spout. The screw cap 13 has the sealing band 51. A ratchet 65 is formed on the inner face of the sealing band 51. A plurality of projecting parts 35 are provided at a part in the peripheral direction of the spout member 12. On the spout member 12, a deformation suppressing part 80 is formed at a site provided with the projecting parts 35. When the screw cap 13 is rotated in the opening direction, as the ratchet 65 makes abut on the projecting parts 35, to stop the rotation of the sealing band 51. When a cap body 50 is rotated furthermore, the predetermined breaking part 61 of the sealing band 51 is broken. When a part of the sealing band 51 is excessively deformed inward on breaking the predetermined breaking part 61, as the inner face of the sealing band 51 makes abut on the deformation suppressing part 80, the sealing band 51 is prevented from being excessively deformed inward. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an extraction port structure for a container provided with a screw cap having a ratchet type sealing band.

  As a cap for closing an extraction port of a container, for example, as disclosed in Japanese Patent Application Laid-Open No. 2004-149156 (Patent Document 1), a screw cap provided with a ratchet type sealing band (TE band) is known. ing. This sealing band is constituted by a plurality (for example, a pair) of band elements along the circumferential direction of the spout member constituting the extraction port. These band elements are connected to each other via a planned fracture portion, and each band element is connected to the cap body via a bridge portion.

When the screw cap in the closed state is rotated in the opening direction, the ratchet provided on the inner surface of the sealing band abuts against the convex portion provided on the spout member, thereby preventing the sealing band from rotating. When the cap body is further rotated in the unsealing direction in this state, the band elements are separated from each other due to breakage of the planned fracture portion, but these band elements remain connected to the cap body via the bridge portion. For this reason, by further rotating the screw cap, the sealing band and the cap body are integrally removed from the spout member.
JP 2004-149156 A

  In the screw cap provided with the ratchet type sealing band, when the screw cap was rotated in the opening direction, there was an example in which the screw cap was removed without breaking the planned breaking portion of the sealing band. When the present inventors diligently studied the cause, the following was found.

  As described above, when the screw cap provided with the sealing band is rotated in the opening direction, the sealing band is prevented from rotating by the ratchet of the sealing band contacting the stopper surface of the convex portion of the spout member. . When the cap body is further rotated in the opening direction in this state, the cap body rotates in the opening direction with respect to the sealing band.

  For this reason, the sealing band is twisted in the rotation direction of the cap body, and a part of the sealing band is bent inward, and another part of the sealing band is bent outward. If this deformation becomes too large, in an extreme case, the ratchet will come off from the stopper surface of the convex portion, and the sealing band will rotate in the opening direction together with the cap body. It has been ascertained that this causes the screw cap to come off without breaking the expected breakage portion of the sealing band.

  Therefore, the present invention provides an extraction port structure for a container that can surely break the expected breakage portion of the sealing band when the screw cap is rotated in the opening direction.

  The present invention is a container extraction port structure having a spout member attached to a container body and a screw cap screwed into the spout member, the spout member having a base fixed to the container body and an open end. A cylindrical portion having an external thread formed on the outer peripheral surface, and a stopper surface formed in a part of the spout member in the circumferential direction between the base portion and the cylindrical portion and protruding in the radial direction of the spout member. The screw cap includes a cap main body having a female screw threadedly engaged with the male screw, and a plurality of band elements connected to the cap main body via a bridge portion. And a sealing band disposed in the circumferential direction of the spout member in a state of being connected to each other, and the screw cap on the inner surface of the sealing band in the opening direction A ratchet that abuts against the stopper surface of the convex portion when it is rolled is provided, and the portion of the spout member that is provided with the convex portion projects more radially than the outer peripheral surface of the cylindrical portion, A deformation inhibiting portion is formed to prevent a part of the sealing band from bending inward in a state where the screw cap is rotated in the opening direction and the ratchet is in contact with the stopper surface.

  For example, the deformation inhibiting portion is formed of a large-diameter portion having an outer diameter larger than that of the cylindrical portion, and the sealing cap is rotated in a state where a part of the sealing band is deformed inward by rotating the screw cap in the opening direction. A part of the inner surface of the band is in contact with the outer peripheral surface of the large diameter portion.

  In addition, a first inclined surface in which the radial height decreases toward the cylindrical portion is formed on the convex portion at an end closer to the cylindrical portion with respect to the axial direction of the spout member. Also good. Furthermore, the convex part may be formed with a second inclined surface in which the radial height decreases toward the base at an end closer to the base with respect to the axial direction of the spout member. Moreover, the groove | channel along the circumferential direction of the said spout member may be formed in the outer peripheral surface of the said deformation | transformation suppression part.

  According to the extraction port structure of the present invention, when the screw cap is rotated in the opening direction, the expected breakage portion of the sealing band can be surely broken. The screw cap is not removed without breaking the part, and unauthorized opening can be prevented. Since the cap body and the sealing band are integrally removed from the spout member, the sealing band can be prevented from remaining on the spout member side.

Hereinafter, an extraction port structure for a container according to a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows an example of the container 10. The container 10 includes a deformable bag-shaped container body 11, a spout member 12 attached to the container body 11, and a screw cap 13 that is screwed into the spout member 12.

  FIG. 2 shows a state in which the screw cap 13 is removed from the spout member 12. FIG. 3 shows a part of the spout member 12. The spout member 12 that functions as an extraction port is integrally formed of, for example, a synthetic resin such as polyethylene or polypropylene. The spout member 12 includes a base portion 20 fixed to the container body 11 by bonding, a cylindrical tube portion 22 having an open end 21, a plurality of flange portions 23, a rod portion 24, and the like. The rod portion 24 extends in a direction along the axis X (shown in FIG. 4) of the spout member 12 and is inserted into the container body 11.

  A through-hole 25 (shown in FIGS. 4, 5, etc.) through which the contents of the container main body 11 pass is formed in a region extending from the base 20 to the open end 21 in the entire length of the spout member 12, thereby forming an extraction port. Has been. The through hole 25 is formed along the axis X direction of the spout member 12. A male screw 30 and an annular rib 31 along the circumferential direction of the cylindrical portion 22 are formed on the outer peripheral surface of the cylindrical portion 22.

  A plurality of convex portions 35 are formed between the flange portion 23 and the annular rib 31 in a part of the spout member 12 in the axis X direction. These convex portions 35 are provided at four locations at equal intervals in the circumferential direction of the spout member 12. These convex portions 35 are formed integrally with the cylindrical portion 22, and each protrudes outward of the spout member 12 (in the radial direction of the cylindrical portion 22).

  As shown in FIG. 4, inclined surfaces 36 and 37 are formed at both ends of the convex portion 35 with respect to the direction of the axis X of the spout member 12. One inclined surface (first inclined surface) 36 is formed at the end of the convex portion 35 on the side close to the cylindrical portion 22. The inclined surface 36 has a shape chamfered at an angle of about 45 ° so that the height in the radial direction decreases toward the cylindrical portion 22. The other inclined surface (second inclined surface) 37 is formed at the end of the convex portion 35 on the side close to the base portion 20. The inclined surface 37 is chamfered at an angle of about 45 ° so that the radial height decreases toward the base portion 20.

  As shown in FIG. 5, a guide surface 40 is formed on the convex portion 35 on the front side of the convex portion 35 and the stopper surface 41 on the rear side of the convex portion 35 with respect to the rotation direction A when the screw cap 13 is opened. Is formed. The guide surface 40 has an inclined shape so that when the screw cap 13 is rotated in the closing direction, a ratchet 65 (to be described later) can slide in the closing direction while the screw cap 13 can move in the closing direction. Yes.

  The stopper surface 41 of the convex portion 35 has a shape that rises in the radial direction of the cylindrical portion 22 of the spout member 12. When the screw cap 13 is rotated in the opening direction, the tip of a ratchet 65 (described later) comes into contact with the stopper surface 41.

  The screw cap 13 has a cap body 50 and a ratchet type sealing band 51. A female screw 55 (a part of which is shown in FIG. 2) is formed on the inner surface of the cap body 50 to be screwed into the male screw 30 of the spout member 12. The cap body 50 and the sealing band 51 are integrally formed of a synthetic resin such as polyethylene or polypropylene.

  The sealing band 51 is composed of a pair of band elements 51a and 51b having the same shape, and has a flexibility that can be bent to some extent when an external force is applied. These band elements 51 a and 51 b are connected to the cap body 50 via the bridge portion 60. Further, the band elements 51a and 51b are connected to each other via a narrow planned break portion 61.

  As will be described later, the planned fracture portion 61 is not broken before the screw cap 13 is opened. When the screw cap 13 is opened, the planned break portion 61 is broken. The sealing band 51 is not limited to the pair of band elements 51a and 51b. In short, since it is only necessary to be constituted by a plurality of band elements that can be divided in the circumferential direction of the screw cap 13, it may be constituted by, for example, three or more band elements.

  As shown in FIG. 5, a pair of ratchets 65 are formed on the inner surface of the sealing band 51 at portions facing each other in the circumferential direction by 180 °. These ratchets 65 can move in the closing direction while sliding the outer surface of the convex portion 35 when the screw cap 13 is rotated in the closing direction. Conversely, when the screw cap 13 is rotated in the opening direction, the ratchet 65 has a shape that rises obliquely so that the tip of the ratchet 65 can abut against the stopper surface 41 of the convex portion 35.

  As shown in FIG. 1, opening assisting portions 70 and 71 are formed on the band elements 51a and 51b. The opening assisting portions 70 and 71 have a function of not breaking when the screw cap 13 is closed but breaking when opening the screw cap 13.

  A large-diameter portion 81 that functions as a deformation suppressing portion 80 is formed between the portion of the spout member 12 where the convex portion 35 is formed, that is, between the annular rib 31 and the flange portion 23. The outer diameter of the large-diameter portion 81 is larger than the outer diameter of the cylindrical portion 22, and when the sealing band 51 is deformed inward, the inner surface of the sealing band 51 or the ratchet 65 comes into contact with the sealing band 51 so that It is possible to prevent bending inward.

  For example, as shown in FIG. 6, when the screw cap 13 is rotated in the opening direction, the ratchet 65 comes into contact with the stopper surface 41 of the convex portion 35, and the sealing band 51 is bent inward. When the inner surface of 51 comes into contact with the deformation suppressing portion 80, the sealing band 51 is prevented from being excessively deformed inward. As shown in FIGS. 3 and 4, the end of the deformation suppressing portion 80 in the direction of the axis X (the end closer to the tube portion 22) is about 45 ° so as not to hurt when touched by the lips. A chamfer 82 inclined at an angle of is formed. The chamfered portion 82 is continuous with the first inclined surface 36 of the convex portion 35 described above.

  The relative height H (shown in FIG. 4) from the outer peripheral surface of the large-diameter portion 81 that functions as the deformation suppressing portion 80 to the tip (radial tip) of the convex portion 35 is 0.4 mm or more and 1.3 mm or less. Is desirable. If the relative height H is greater than 1.3 mm, excessive deformation of the sealing band 51 cannot be suppressed when the planned fracture portion 61 is fractured, and the ratchet 65 may be disengaged from the convex portion 35. When the relative height H is smaller than 0.4 mm, the tip of the ratchet 65 is not easily applied to the convex portion 35 when the screw cap 13 is opened.

Below, an effect | action of the container 10 provided with the extraction port structure of the said structure is demonstrated.
The contents are stored in the container body 11 and the screw cap 13 is screwed into the male screw 30 of the cylindrical portion 22 of the spout member 12, thereby closing the open end 21 of the spout member 12. When the screw cap 13 is rotated in the closing direction, the ratchet 65 of the sealing band 51 slips on the guide surface 40 of the protruding portion 35 and gets over the protruding portion 35, so that the screw cap 13 is allowed to rotate in the closing direction. The For this reason, at the time of plugging, the planned fracture portion 61 is not broken, and the cap body 50 and the sealing band 51 are integrated, and the screw cap 13 can be screwed to a predetermined closing position.

  In order to remove the screw cap 13 from the spout member 12, the screw cap 13 is rotated in the opening direction. As shown in FIG. 5, when the screw cap 13 is rotated in the opening direction (direction indicated by the arrow A), the leading end of the ratchet 65 abuts against the stopper surface 41 of the convex portion 35, thereby preventing the sealing band 51 from rotating. Made.

  When the cap body 50 is further rotated in the opening direction in this state, the cap body 50 is relatively rotated in the opening direction with respect to the sealing band 51 that is stopped, and the opening assisting portions 70 and 71 (FIG. 1). The cap body 50 moves in a direction away from the sealing band 51.

  When the cap body 50 rotates in the opening direction with the tip of the ratchet 65 abutting against the stopper surface 41, the sealing band 51 is twisted, so that the sealing band 51 is deformed to some extent. For example, as shown in FIG. 6, a part of the sealing band 51 is deformed so as to bend inward, and the remaining part of the sealing band 51 is deformed so as to be bent outward.

  When a part of the sealing band 51 is excessively deformed inward, a part of the sealing band 51 hits the deformation suppressing portion 80, thereby further preventing the sealing band 51 from being deformed further inward. For this reason, it is suppressed that the remaining part of the sealing band 51 deform | transforms outside. As a result, the problem that the ratchet 65 is detached from the stopper surface 41 of the convex portion 35 can be prevented, and the sealing band 51 can be prevented from spinning around together with the cap body 50.

  For this reason, as shown in FIG. 7, the fracture | rupture scheduled part 61 fractures | ruptures and the band elements 51a and 51b are mutually separated. In addition, these band elements 51 a and 51 b remain connected to the cap body 50 via the bridge portion 60.

  As described above, according to the present embodiment, the planned fracture portion 61 connecting the band elements 51a and 51b can be reliably broken. Since the bridge portion 60 does not break, the cap body 50 and the sealing band 51 are maintained in a state of being connected to each other via the bridge portion 60. For this reason, the screw cap 13 can be reliably removed from the spout member 12 with the sealing band 51 attached to the cap body 50.

  Thus, since the cap main body 50 and the sealing band 51 are integrated and removed from the spout member 12, the sealing band 51 does not remain on the spout member 12 side after opening.

  By removing the screw cap 13 from the spout member 12 and including the cylindrical portion 22 in the mouth, the contents contained in the container body 11 can be eaten and consumed. At this time, a part of the lips may touch the convex portion 35, but the convex portion 35 is formed with inclined surfaces 36 and 37 at both ends in the axis X direction, and the large diameter portion 81 is also formed with a chamfered portion 82. Therefore, even if the lips hit the convex portion 35 or the large diameter portion 81, there is no pain and there is no risk of injury.

  Even if the screw cap 13 once opened is screwed into the male screw 30 of the spout member 12 again, as shown in FIG. 2, the band elements 51a, 51b remain arc-shaped and the tips of the band elements 51a, 51b are convex. By hitting the stopper surface 41 of 35, a state of spreading in an arc shape is maintained. For this reason, even if the screw cap 13 is screwed into the spout member 12 again, it can be clearly shown by its appearance that the screw cap 13 is opened.

  8 and 9 show a spout member 12 'according to a second embodiment of the present invention. In the spout member 12 ′, a groove 90 along the circumferential direction is formed on the outer peripheral surface of the large diameter portion 81 that functions as the deformation suppressing portion 80. By forming the groove 90 in the large diameter portion 81, it is possible to reduce the substantial thickness of the large diameter portion 81 as compared with the large diameter portion 81 of the first embodiment. The material used for the member 12 'can be reduced.

  In addition, since the groove 90 is formed, it is possible to make it difficult to cause a problem of “thinning” after resin curing caused by a large thickness. In addition, it is easy to cool the large diameter portion 81 when the spout member 12 'is injection molded. Since other configurations and operations are the same as those of the first embodiment, the same reference numerals as those of the spout member 12 of the first embodiment are used and description thereof is omitted.

  Note that the present invention is not limited to the above-described embodiment, and in carrying out the present invention, for example, components of the extraction port structure such as the convex portion of the spout member, the deformation suppressing portion, the sealing band of the screw cap, the ratchet, etc. Needless to say, the present invention can be appropriately modified.

The front view of the container provided with the extraction port structure which concerns on the 1st Embodiment of this invention. The perspective view of the state which removed the screw cap from the spout member of the container shown by FIG. The front view of a part of spout member of the container shown by FIG. The longitudinal cross-sectional view of the spout member which follows the F4-F4 line | wire in FIG. The cross-sectional view of the spout member and the sealing band along the line F5-F5 in FIG. FIG. 6 is a transverse sectional view when a force in the opening direction is applied to the sealing band shown in FIG. 5. The cross-sectional view which shows the state which the fracture | rupture planned part of the sealing band shown by FIG. 5 fractured | ruptured. The front view of a part of spout member concerning a 2nd embodiment of the present invention. The longitudinal cross-sectional view of the spout member shown by FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Container 12, 12 '... Spout member 13 ... Screw cap 20 ... Base part 21 ... Open end 22 ... Cylindrical part 30 ... Male screw 35 ... Convex part 36 ... 1st inclined surface 37 ... 2nd inclined surface 41 ... Stopper surface DESCRIPTION OF SYMBOLS 50 ... Cap main body 51 ... Sealing band 51a, 51b ... Band element 60 ... Bridge part 61 ... Breaking part 65 ... Ratchet 80 ... Deformation suppression part 81 ... Large diameter part 90 ... Groove

Claims (5)

An extraction port structure for a container having a spout member attached to the container body and a screw cap screwed into the spout member,
The spout member is
A base fixed to the container body;
A cylindrical portion having an open end and a male screw formed on the outer peripheral surface;
A convex part formed between a part of the spout member in the circumferential direction between the base part and the cylindrical part and having a stopper surface protruding in a radial direction of the spout member;
The screw cap is
A cap body having a female screw threadably engaged with the male screw;
Including a plurality of band elements connected to the cap body via a bridge portion, and a sealing band disposed in the circumferential direction of the spout member in a state where these band elements are connected to each other via a planned break portion;
On the inner surface of the sealing band, a ratchet that contacts the stopper surface of the convex portion when the screw cap is rotated in the opening direction is provided, and
In a state where the projection of the spout member is provided in a radial direction from the outer peripheral surface of the cylindrical portion, the screw cap is rotated in the opening direction, and the ratchet is in contact with the stopper surface. An extraction port structure for a container, wherein a deformation inhibiting portion for preventing a part of the sealing band from bending inward is formed.   The deformation restraining portion comprises a large-diameter portion having an outer diameter larger than that of the cylindrical portion, and in a state where a part of the sealing band is deformed inward by rotating the screw cap in the opening direction. The extraction port structure for a container according to claim 1, wherein a part of the inner surface is in contact with the outer peripheral surface of the large-diameter portion.   The convex part is formed with a first inclined surface at the end closer to the cylindrical part with respect to the axial direction of the spout member so that the radial height decreases toward the cylindrical part. The extraction port structure for a container according to claim 2, wherein the container has an extraction port structure.   The convex portion is formed with a second inclined surface in which the radial height decreases toward the base at an end closer to the base with respect to the axial direction of the spout member. The extraction port structure for a container according to claim 3.   The container outlet structure according to any one of claims 2 to 4, wherein a groove along the circumferential direction of the spout member is formed on an outer peripheral surface of the deformation suppressing portion.

Images