JP2014084141A - Spout stopper and packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spout stopper reducing the risk of failing in opening.SOLUTION: A spout stopper includes: a side wall; a sealing plate provided with an annular thin part and an opening scheduled part; a strut of which the lower end is connected with a predetermined width along the outer edge of the opening scheduled part; and a pull ring connected to the upper end of the strut. The strut has, in a projection shape to a plane vertical to the direction of connecting the center of the opening scheduled part and the center of a predetermined width, a width at a predetermined height equal to or higher than one ninth and equal to or lower than two thirds of the height of the strut from the lower end of the strut, which is equal to or less than a width at another optional position, and also increased in width as it goes from a predetermined height toward the upper end. The width at the height of the lower ends at both ends of the pull ring is twice or more than the width at the predetermined height and equal to or less than the outside diameter of the pull ring. In the connection part to the opening scheduled part, at least in a part outside of the part along the outer edge of the opening scheduled part, the radius of curvature in the maximum inclination direction is larger than the radius of curvature in the maximum inclination direction in the respective parts along the outer edge of the opening scheduled part.

Description

  The present invention relates to a spout stopper that is attached to a pouring position of a packaging container containing liquid, powder, granules, or the like as contents.

  A packaging container provided with a spout stopper is widely used as a packaging container for fluid contents such as liquid. FIG. 5 shows an example of a packaging container provided with a spout stopper. The spout stopper is constituted by a cap fixed to the container body and detachable from the spout stopper.

  6 (a) and 6 (b) show longitudinal sectional views of a conventional spout stopper 900 according to each of two orthogonal planes. The spout stopper 900 has a cylindrical side wall 901, a sealing plate 904 that closes the inside of the side wall 901, and is formed with an annular thin portion 902 and a planned opening portion 903 surrounded by the thin portion 902, and a sealing plate 904. A column 905 having a lower end connected to the predetermined width along the outer edge of the planned opening portion 903, and an annular pull ring 906 connected to the upper end of the column 905. Further, a thread for screwing the cap is formed on the outer surface of the side wall 901.

  By pulling the pull ring 906 with a finger, the sealing plate 904 is broken along the thin portion 902 and opened. Although the sealing plate 904 cannot be restored after opening, it can be resealed by screwing the cap onto the side wall 901.

Japanese Patent Laid-Open No. 2004-67101

  When pulling the pull ring 906, it is preferable that the component force in the direction parallel to the blocking plate 904 of the pulling force is pulled in the direction from the support column 905 toward the center of the blocking plate 904. For example, it is preferable to pull in the direction of A in FIG. When pulling so that this component force is in the opposite direction, for example, when pulling in the direction of B in FIG. 6 (a), it is difficult to start and advance the breakage of the sealing plate 904, and excessive pulling force is generated because it is forced to break. In addition, the connection point between the support column 905 and the sealing plate 904 or the connection point between the support column 905 and the pull ring 906 may be broken, and the opening may be failed.

  In addition, immediately after filling the packaging container with high-temperature contents, the pull ring 906 is opened for the purpose of quality test, etc. When pulling the pull ring 906, the support column 905 etc. is softened due to high temperature, and the opening may fail. was there.

  Therefore, an object of the present invention is to provide a spout stopper with reduced risk of unsuccessful opening.

  The present invention has a cylindrical side wall, a sealing plate in which the inner side of the side wall is closed, an annular thin portion and a planned opening portion surrounded by the thin portion are formed, and an outer edge of the planned opening portion of the sealing plate. In a projected shape on a plane perpendicular to the direction connecting the center of the planned opening and the center of the predetermined width, the column is provided with a column to which the lower end is connected at a predetermined width and a pull ring connected to the upper end of the column. The width at a predetermined height of 1/9 to 2/3 of the height of the column from the lower end of the column is equal to or less than the width of any other position, and as it goes from the predetermined height toward the upper end The spout stopper has a width that gradually increases, and the width at the height of the lower end of the pull ring is not less than twice the width at the predetermined height and not more than the outer diameter of the pull ring. In addition, the curvature radius in the maximum inclination direction is the maximum inclination direction in each portion along the outer edge of the planned opening portion at least in a portion other than the portion along the outer edge of the planned opening portion in the connection portion with the planned opening portion. It is preferable that the radius of curvature is larger.

  In addition, it is preferable that a thick portion in which the thickness in the diameter direction of the planned opening portion increases as it goes to the end portion along the outer periphery of the planned opening portion is formed at the connection portion between the support column and the planned opening portion. .

  The present invention is also directed to a packaging container comprising a container body, the above-described spout stopper attached to the container body, and a cap attached to the spout stopper.

  ADVANTAGE OF THE INVENTION According to this invention, the intensity | strength of a support | pillar can be improved, it can become difficult to tear, and the spout stopper which reduced the possibility that opening may fail can be provided.

The top view of the spout stopper concerning an embodiment of the present invention The longitudinal cross-sectional view of the spout stopper which concerns on embodiment of this invention The expanded perspective view of a part of spout stopper concerning an embodiment of the present invention The longitudinal cross-sectional view of the spout stopper which concerns on the modification of embodiment of this invention Figure showing a packaging container with a spout Vertical cross-sectional view of a conventional spout stopper

(Embodiment)
Embodiments of the present invention will be described below. FIG. 1 is a plan view of the spout stopper 100 according to the present embodiment, and FIGS. 2A and 2B are views taken along lines XX ′ and YY ′ of FIG. 1, respectively. 3 is a cross-sectional view of the outlet plug 100. FIG.

  The spout stopper 100 includes a cylindrical side wall 101, a blocking plate 104, a support column 105, and a pull ring 106. The blocking plate 104 closes the inside of the side wall 101. An annular thin portion 102 is formed on the sealing plate 104. The planned opening portion 103, which is a region surrounded by the thin portion 102, is removed along the thin portion 102 at the time of opening and becomes an opening portion.

  The column 105 is connected with a predetermined width along a part of the outer edge of the planned opening 103. An annular pull ring 106 is connected to the upper end of the column 105. In addition, a rib 107 is formed along the height direction of the column 105 at the center of the side surface of the column 105 on the center side of the planned opening 103.

  A screw thread for screwing the cap is formed on the outer surface of the side wall 101. The spout stopper 100 is manufactured by integrally molding using, for example, low density polyethylene (LDPE). In addition, a cap is manufactured by shape | molding, for example using a polypropylene (PP).

  FIG. 2B is a cross-sectional view in a plane perpendicular to the direction connecting the center of the planned opening 103 and the circumferential center of the planned opening 103 at the connection point between the support column 105 and the planned opening 103. A part of the spout stopper 100 is vertically projected on this plane. In the projection view, the narrowest portion C of the column 105 exists in a range from one-ninth to two-thirds of the height of the column 105 from the lower end of the column 105. The width of the column 105 may be uniform within this range. Moreover, the width | variety of the support | pillar 105 in the location C is 2 mm, for example.

  Moreover, on the projection view, the column 105 gradually increases in width and has a fan shape in a monotonous non-decreasing manner from the position C toward the upper end. In addition, let the height of the upper end of the support | pillar 105 be the height of the lower end of the both ends of the pull ring 106 in a projection drawing. The width of the upper end of the column 105 is equal to or smaller than the outer diameter of the pull ring 106 in the projection view. Moreover, it is preferable that it is 2 times or more of the width | variety in the location C, and it is especially preferable that it is 3.4 times or more. In addition, the outer diameter of the pull ring 106 is 13 mm as an example.

  As described above, the width of the connection portion between the support column 105 and the pull ring 106 is made larger than the intermediate portion of the support column 105 to improve the strength of the connection portion. By preventing the occurrence of a notch or the like, even when the support column 105 receives a large pulling force from the pull ring 106 or when it becomes a high temperature, it is difficult to tear off and the failure of opening can be reduced.

  FIG. 3 shows an enlarged perspective view of the vicinity of the connection portion between the support column 105 and the planned opening portion 103. In FIG. 3, a portion along the outer edge of the planned opening 103 is indicated by a dotted line, and a portion other than this is indicated by a thick line. At least a part or all of the connection location other than the portion along the outer edge of the planned opening portion 103 has a radius of curvature in the maximum inclination direction that is greater than the curvature radius of the maximum inclination direction in each portion along the outer edge of the planned opening portion 103. It is getting bigger. For example, the radius of curvature R1 of each part along the outer edge of the planned opening 103 is 0.1 mm, the radius of curvature R2 and R3 of the rib 107 and the column 105 on the side of the center of the planned opening 103, and the column 105 It is preferable that the curvature radius R4 of both ends along the outer edge of the planned opening 103 is 1.5 mm. As a result, the connecting portion between the support column 105 and the planned opening portion 103 is thickened to improve the strength of the connection portion, and the notch or the like that causes the breakage of the support column 105 in the vicinity of the connecting portion to generate a break. By preventing this, even when the support column 105 receives a large pulling force from the pull ring 106 or when the support column 105 becomes high temperature, it is difficult to tear off, and failure of opening can be reduced. In particular, when the component force in the direction parallel to the blocking plate 104 of the tensile force is directed from the center of the blocking plate 104 to the column 105, the effect of making the column 105 difficult to tear is high.

  Further, as shown in FIG. 3, the diameter of the planned opening portion 103 in the diameter direction increases at the connection portion between the support column 105 and the planned opening portion 103 as it goes to the end along the outer periphery of the planned opening portion 103. The thick part 108 may be formed. Thereby, the intensity | strength of the connection location of the support | pillar 105 and the opening plan part 103 can be improved, the support | pillar 105 can be made difficult to tear, and the failure of opening can be reduced.

(Modification)
Hereinafter, modifications of the present embodiment will be described. The spout stopper 200 is obtained by replacing the pull ring 106 with the pull ring 206 in the spout stopper 100 according to the first embodiment. 4A and 4B are cross-sectional views (projected views) of the spout stopper 200 according to the present embodiment, each of two orthogonal planes passing through the center of the planned opening portion 103. FIG. FIG. 4B is a cross-sectional view in a plane perpendicular to the direction connecting the center of the planned opening portion 103 and the connection portion between the support column 105 and the planned opening portion 103 in the circumferential direction of the planned opening portion 103. It is. The pull ring 206 has a V-shaped notch formed in the upper part of the connection portion with the support column 105. Also in this modification, the same effects as described above can be obtained. In addition, when the plane including the periphery of the lower end of the pull ring 206 is not horizontal as in the present modification, the upper end of the support column 105 is set as a location where the plane and the support column 105 intersect. Further, the V-shaped notch may extend to the upper end of the support column 105. In this case, the width of the support column 105 is the distance between both ends of the support column 105 on the projection view, and the width of the notch portion is not subtracted.

  In the present invention, the features described in the above-described embodiments and modifications may be modified or omitted as appropriate. Moreover, such a spout stopper can constitute a packaging container by screwing a cap and attaching it to the container body. Various containers such as paper packs and soft pouches can be used as the container body.

  INDUSTRIAL APPLICATION This invention is useful for the packaging container etc. which attached the spout stopper and the extraction stopper.

100, 200, 900 Outlet plug 101, 901 Side wall 102, 902 Thin wall portion 103, 903 Expected opening portion 104, 904 Sealing plate 105, 905 Strut 106, 206, 906 Pull ring 107 Rib 108 Thick wall portion

Claims (5)

A cylindrical side wall;
Blocking the inside of the side wall, a sealing plate in which an annular thin portion and a planned opening portion surrounded by the thin portion are formed,
A column to which a lower end is connected at a predetermined width along an outer edge of the planned opening portion of the blocking plate,
A pull ring connected to the upper end of the column,
The column is
In a projection shape onto a plane perpendicular to the direction connecting the center of the planned opening portion and the center of the predetermined width, a predetermined value that is not less than 1/9 and not more than 2/3 of the height of the column from the lower end of the column The width at the height is equal to or less than the width at any other position, and gradually increases from the predetermined height toward the upper end, and the width at the lower end height at both ends of the pull ring. Is not less than twice the width at the predetermined height and not more than the outer diameter of the pull ring,
In at least a part of the connection portion with the planned opening portion other than the portion along the outer edge of the planned opening portion, the radius of curvature in the maximum inclination direction is the maximum inclination in each portion along the outer edge of the planned opening portion. Outlet plug larger than the radius of curvature in the direction. A cylindrical side wall;
Blocking the inside of the side wall, a sealing plate in which an annular thin portion and a planned opening portion surrounded by the thin portion are formed,
A column to which a lower end is connected at a predetermined width along an outer edge of the planned opening portion of the blocking plate,
A pull ring connected to the upper end of the column,
In the projection shape onto the plane perpendicular to the direction connecting the center of the planned opening portion and the center of the predetermined width, the support column is at least one-third to two-thirds of the height of the support column from the lower end of the support column. The width at the following predetermined height is equal to or less than the width at any other position, and the width gradually increases from the predetermined height toward the upper end, and at the lower ends of both ends of the pull ring. The spout stopper, wherein the width at the height is not less than twice the width at the predetermined height and not more than the outer diameter of the pull ring. A cylindrical side wall;
Blocking the inside of the side wall, a sealing plate in which an annular thin portion and a planned opening portion surrounded by the thin portion are formed,
A column to which a lower end is connected at a predetermined width along an outer edge of the planned opening portion of the blocking plate,
A pull ring connected to the upper end of the column,
The strut has a radius of curvature in the maximum inclination direction along the outer edge of the planned opening portion, at least in a portion other than the portion along the outer edge of the planned opening portion of the connection portion with the planned opening portion. A spout plug that is larger than the radius of curvature of the portion in the maximum inclination direction   In the connection portion between the support column and the planned opening portion, a thick portion is formed in which the thickness in the diameter direction of the planned opening portion increases as it proceeds to the end along the outer periphery of the planned opening portion. The spout stopper according to any one of claims 1 to 3. A container body;
The spout stopper according to any one of claims 1 to 4, which is attached to the container body,
A packaging container comprising a cap attached to the spout stopper.

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