JP6015016B2 - Outlet stopper and packaging container - Google Patents

Description

  The present invention relates to a spout stopper that is welded from the inside of a packaging container to a pouring position of the packaging container that contains liquid, powder, granules, or the like.

  A packaging container provided with a spout stopper is widely used as a packaging container for fluid contents such as liquid. FIG. 10 shows an example of a packaging container provided with a spout stopper. The spout stopper is composed of a spout fixed to the container body and a cap detachable from the spout.

  In FIG. 11, sectional drawing and the bottom view of the spout 4 which patent document 1 discloses are shown. The spout 4 includes a cylindrical side wall 41, a flange-like flange 42 provided so as to protrude outward from one end of the side wall 41, and a circumferential direction of the side wall 41 on the outer surface of the side wall 41 on the other end side of the flange 42. The four paper pressing projections 43 provided at equal intervals, the concave meat stealing portion 44 continuously provided in the circumferential direction on the end surface on one end side of the side wall 41, and the inner surface of the meat stealing portion 44 are spanned. And four ribs 45 provided at positions facing the protrusions 43 in the circumferential direction of the side wall 41. Further, a partition wall 46 for closing the spout 4 inside the side wall 41, a half cut 47 continuously formed in the circumferential direction on one surface of the partition wall 46 located on one end side of the side wall 41, And a pull ring 48 for pulling out a part of the partition wall 46 provided in the direction and surrounded by the half cut 47. Further, a screw thread for screwing the cap is formed on the outer surface of the side wall 41. The spout 4 is produced, for example, by integrally molding using low density polyethylene (LDPE). A cap is produced by shape | molding, for example using a polypropylene (PP).

  The spout 4 is attached by ultrasonic welding to the opening of the container body. That is, the spout 4 is set in the opening of the container body, and the ultrasonic welding horn is applied to the container body 2 in contact with the flange 42 to generate ultrasonic vibrations, whereby the flange 42 is thermally welded to the container body 2. At this time, the meat stealing unit 44 can suppress the ultrasonic vibration energy from propagating to the partition wall 46 to a certain extent and prevent the partition wall 46 from being deformed.

  In the meat stealing portion 44, four ribs 45 are disposed at positions facing the protrusions 43 in the circumferential direction of the side wall 41, and the protrusions 43 and the ribs 45 are aligned in the radial direction. The ribs 45 absorb the energy of ultrasonic vibration during ultrasonic welding, and can prevent deformation around the meat stealing portion 44.

JP 2010-105383 A

  However, in the spout 4, when ultrasonic welding is performed at a low temperature, the rib 45 cannot absorb the energy of the ultrasonic vibration, and the half cut 47 of the thin partition wall 46 is broken, so that the spout 4 is sufficiently deformed. There was a risk that it could not be prevented.

  Therefore, an object of the present invention is to provide a spout stopper that can prevent deformation even when attached to a container body by ultrasonic welding at low temperatures.

The present invention is a spout plug provided with a spout and a cap attached to the spout, the spout is a cylindrical side wall, a partition wall that closes the inside of the spout and has an annular half cut formed thereon, A pull ring for opening connected to the partition wall, a flange provided to protrude outward from one end of the side wall, and welded to the opening of the liquid packaging container, on the outer surface of the side wall on the other end side of the side wall from the flange, A plurality of protrusions intermittently formed in the circumferential direction of the side wall, a concave meat stealing portion continuously provided in the circumferential direction on the end surface on one end side of the side wall, and a plurality of ribs spanning the inner surface of the meat stealing portion The protrusion is 1.8 to 4.5 mm in the circumferential direction of the side wall and 0.2 to 0.7 mm in the radial direction, and the meat stealing portion is a cross section by a plane passing through the central axis of the side wall Is 1.1 to 1.9 mm in diameter direction In a direction perpendicular to the direction the size of 1.2～1.6Mm. The number of protrusions is 3 or more and 8 or less, the number of ribs is more than the number of protrusions, and ribs are formed at each of the positions facing the protrusions in the circumferential direction of the side wall.

  Moreover, it is preferable to provide 6-8 protrusions and ribs, respectively.

  As for a side wall, it is preferable that the minimum value of the thickness of the normal direction in each point of the inner surface of a meat stealing part is 0.7 mm-1.2 mm.

  It is preferable that the meat stealer has a rounded top surface and a U-shaped shape whose width extends from the top surface to the opening.

  The portion of the side wall between one end and the partition wall is preferably rounded.

  The present invention is also directed to a packaging container including a container body and the above-described spout stopper.

  According to the present invention, it is an object of the present invention to provide a spout stopper that can prevent deformation even when attached to a container body by ultrasonic welding at low temperatures.

Sectional drawing of the spout stopper which concerns on 1st Example of this invention The top view and bottom view of the spout which concerns on 1st Example of this invention The expanded sectional view of the spout concerning the 1st example of the present invention. Top view and bottom view of spout according to second embodiment of the present invention Sectional drawing of the spout which concerns on 2nd Example of this invention. The expanded sectional view of the spout concerning the 2nd example of the present invention. Top view and bottom view of spout according to third embodiment of the present invention Sectional drawing of the spout which concerns on 3rd Example of this invention. The expanded sectional view of the spout concerning the 3rd example of the present invention. Figure showing a packaging container with a spout Figure showing the spout of a conventional spout stopper

  Three examples according to one embodiment of the present invention will be described below.

Example 1
FIG. 1 is a cross-sectional view of a spout stopper 100 according to a first embodiment of the present invention. FIGS. 2A and 2B are top views of a spout 101 when a cap 102 is not screwed, respectively. It is a bottom view. FIG. 3 is a cross-sectional view of the spout 101 taken along the line AA ′ of FIG.

  The spout stopper 100 includes a plastic cap 102 and a spout 101. A partition wall 106 is provided inside the spout 101 and closes the spout 101. The partition wall 106 is formed with an annular half-cut 105 serving as a breakage point at the time of opening. An opening pull ring 103 is formed in connection with the partition wall 106. When the pull ring 103 is pulled with a finger, the partition wall 106 is broken along the half-cut 105 and opened. After opening, the partition wall 106 cannot be restored, but the spout 101 can be resealed by screwing the cap 102 onto the side wall 107. A flange 104 that extends outward is formed from one end of the side wall 107. Further, the side wall 107 has a cylindrical shape, and a screw thread is formed on the outside. Further, the cap 102 has a screw thread corresponding to the inner side surface, and is screwed to the spout 101.

  As shown in FIG. 2, six protrusions 108 are intermittently formed on the outer surface of the side wall 107 on the other end side of the side wall 107 from the flange 104 in the circumferential direction of the side wall 107. There are two types of protrusions 108, a first protrusion 108-1 and a second protrusion 108-2, and the sizes and shapes are different. Three each of the first protrusions 108-1 and the second protrusions 108-2 are alternately formed at equal intervals on the outer periphery of the side wall 107. Ultrasonic welding in a state where the flange 104 is in contact with the inner surface of the edge of the mounting hole of the container body and the edge of the mounting hole of the container body is sandwiched between the projection 108 and the flange 104 (hereinafter referred to as a temporary set). By doing so, the flange 104 adheres to the packaging container, and the spout 101 is fixed to the container body.

  On the end face of the end of the side wall 107 on the side where the flange 104 is provided, a concave meat stealing portion 109 is formed in the circumferential direction. On the inner surface of the meat stealing portion 109, a plurality of ribs 110 are formed to span the inner surface. The rib 110 is formed at a position facing the protrusion 108.

  3A and 3B are a cross-sectional view and a line AA ′ of the first protrusion 108-1 and the second protrusion 108-2 along the line BB ′ shown in FIG. 2, respectively. An enlarged cross-sectional view of the vicinity of the meat stealing portion 109 along is shown, and major dimensions are also shown in mm units.

(Example 2)
FIGS. 4A and 4B are a top view and a bottom view, respectively, of the spout 201 of the spout stopper according to the present embodiment. Since the cap is the same as the cap 102, the illustration is omitted. FIG. 5 is a cross-sectional view of the spout 201 along the line CC ′ of FIG. In each figure, the same reference numerals are given to the same components as the components of the spout 101. The spout 201 is different from the spout 101 in the size of each component, but the other points are the same and the description is omitted.

  6 (a) and 6 (b) are a cross-sectional view and a CC 'line of the first protrusion 108-1 and the second protrusion 108-2 along the line DD' shown in FIG. 4, respectively. An enlarged cross-sectional view of the vicinity of the meat stealing portion 109 along is shown, and major dimensions are also shown in mm units.

(Example 3)
FIGS. 7A and 7B are a top view and a bottom view of the spout 301 of the spout stopper according to the present embodiment, respectively. Since the cap is the same as the cap 102, the illustration is omitted. FIG. 8 is a cross-sectional view of the spout 301 taken along the line EE ′ of FIG. In each figure, the same reference numerals are given to the same components as the components of the spout 101. The spout 301 differs from the spout 101 in the size of each component, and is different in that eight ribs 110 are formed on the inner surface of the meat stealing portion 109 at equal intervals in the circumferential direction. Since the other points are the same as the spout 101, the description thereof is omitted.

  9A and 9B are cross-sectional views and EE ′ lines of the first protrusion 108-1 and the second protrusion 108-2 along the line FF ′ shown in FIG. 9, respectively. An enlarged cross-sectional view of the vicinity of the meat stealing portion 109 along is shown, and major dimensions are also shown in mm units.

  Each spout described above satisfies predetermined conditions such as dimensions and shape for preventing deformation even when the spout is attached to the container body by ultrasonic welding at a low temperature. This condition will be described below.

  The meat stealing portion 109 has a cross section of a plane passing through the central axis of the side wall 107 having a size of 1.1 to 1.9 mm in the radial direction and 1.2 to 1.6 mm in the direction perpendicular to the radial direction. preferable. Moreover, it is preferable that the minimum value of the thickness of the normal direction in each point of the inner surface of the meat stealing part 109 is 0.7 mm-1.2 mm. If it is larger than this range, molding becomes difficult, and if it is smaller, it becomes difficult to absorb ultrasonic energy.

  The protrusion 108 is preferably 1.8 to 4.5 mm in the circumferential direction of the side wall 107 and 0.2 to 0.7 mm in the radial direction. If it is smaller than this range, temporary setting becomes difficult, and if it is larger, the packaging container may be damaged during temporary setting. Further, the number is preferably 3 or more, particularly preferably 6 to 8. If the number is less than 3, it becomes difficult to temporarily set the spout on the container body. Moreover, if it is 6-8 pieces, the stability of a temporary set will increase. The protrusions 108 may all have the same shape, or may have different shapes as long as the size is in the above range. Further, if at least the number of the ribs 110 is the same as that of the protrusions 108, the energy of ultrasonic waves can be sufficiently absorbed. Further, when the rib 110 is formed at a position facing the protrusion 108 (position overlapping each other in the top view and the bottom view), the concentration of ultrasonic energy on the protrusion 108 is more easily relaxed.

  Moreover, it is preferable that the inner surface of the meat stealing portion 109 has a round top surface so as to have a U-shaped cross section. Moreover, it is preferable that the area | region from the edge part of the side wall 107 which is the area | region of the meat stealing part 109 to the partition 106 is the shape where the surface was rounded off. Thereby, a sharp change in the curvature of the surface is suppressed, and it is possible to easily prevent local concentration of ultrasonic energy. In addition, the width of the inner surface of the meat stealing portion 109 is preferably a shape that widens from the top surface to the opening.

  Under the above conditions, the spout of the present embodiment can improve the stability of the temporary set, and can prevent deformation even when the spout is attached to the container body by ultrasonic welding at low temperatures.

  Although the cap is screwed to the spout, the cap is not particularly limited as long as the spout can be repeatedly sealed and opened. For example, a structure in which the outer surface of the spout is simply covered with the inner surface of the cap so as to be in close contact, or a structure in which the cap and the spout are fitted may be employed.

  Also in each of the above-described modifications, the deformation can be prevented even if the dimensions and the shape of each component described above are satisfied and the container body is attached to the container body by ultrasonic welding at a low temperature.

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

100, 200, 300 Outlet plug 101, 201, 301, 4 Spout 102 Cap 103, 48 Pull ring 104, 42 Flange 105, 47 Half cut 106, 46 Septum 107, 41 Side wall 108, 108-1, 108-2, 43 Projection 109, 44 Meat stealing part 110, 45 Rib

Claims (6)

A spout plug comprising a spout and a cap attached to the spout,
The spout is
A cylindrical side wall;
A partition wall in which the inside of the spout is closed and an annular half cut is formed;
A pull ring for opening connected to the partition;
A flange provided to protrude outward from one end of the side wall, and welded to the opening of the liquid packaging container;
A plurality of protrusions intermittently formed in the circumferential direction of the side wall on the outer surface of the side wall on the other end side of the side wall from the flange;
A concave meat stealing portion continuously provided in the circumferential direction on the end surface on the one end side of the side wall;
A plurality of ribs that span the inner surface of the meat stealer,
The protrusions have a size of 1.8 to 4.5 mm in the circumferential direction of the side wall and 0.2 to 0.7 mm in the radial direction.
The thinned-out part is a section along a plane passing through the central axis of said sidewalls, Ri magnitude der of 1.2~1.6mm radially 1.1～1.9Mm, in a direction perpendicular to the radial direction,
The number of the protrusions is 3 or more and 8 or less,
The number of ribs is equal to or greater than the number of protrusions,
Wherein the each of the projections facing the positions in the circumferential direction of the side wall, the ribs that are formed, the spout stopper.   The extraction mouth plug according to claim 1, comprising 6 to 8 protrusions and ribs. The spout stopper according to claim 1 or 2 , wherein a minimum value of a thickness in a normal direction at each point on the inner surface of the meat stealing portion is 0.7 mm to 1.2 mm. The thinned-out part is a section along a plane passing through the central axis of the side walls, the top rounded, in the shape of a U-shaped width toward the opening widens from the top surface, it claims 1-3 The spout stopper described in 1. The spout stopper according to any one of claims 1 to 4 , wherein a portion of the side wall between the one end and the partition wall is rounded. A packaging container,
A container body;
A packaging container provided with the spout stopper in any one of Claims 1-5 welded to the said container main body.

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