JP4730182B2 - Cap outlet with cap - Google Patents

Description

  The present invention relates to a spout with a cap, and more specifically, a spout with a cap in which resin at the time of heat fusion escapes into the recess by a recess provided in the flange, and the outer periphery of the flange is uniformly heat-sealed. And a paper container having a spout with a cap.

  Conventionally, there is a liquid paper container such as a Gobeltop type as a container for alcoholic beverages, and a spout with a cap is used as a stopper (Patent Document 1). The spout described in Patent Document 1 is made of synthetic resin, and a pour tube is integrally provided in the flange portion, and a blocking wall having a tear groove is provided inside the pour tube, It is a spout consisting of a lid to be covered. In order to attach such a spout to a paper container, an opening peripheral edge is formed in the container in advance, and the spout of the container is temporarily fixed to the open peripheral, and the paper container is placed on the anvil. In addition, the horn of the ultrasonic welding device may be placed on the upper part of the spout, the container and the flange portion may be sandwiched between the horn and the anvil, and ultrasonic vibration may be applied for welding. In addition, the heat sealing resin is laminated | stacked on the flange contact part of a paper container.

  There is also a technique related to an apparatus for attaching such a paper container spout (Patent Document 2). For example, an ultrasonic horn is disposed at a position facing an anvil on which a carton is mounted, and a first shutter that holds a single spout in a predetermined position is provided directly below the ultrasonic horn, and a pour is provided adjacent to the shutter. A shooter that conveys the outlet and a second shutter that restrains the advancement of the spout on the shooter are provided. By opening and closing the second shutter, one spout is sent to the first shutter, and this is sent by an ultrasonic horn. After sucking and holding, the first shutter is opened, and the spout is ultrasonically sealed in a carton with an ultrasonic horn. The first shutter can be attached to the carton based on the direction of the flange.

There is also a technique related to a spout having a flange having a specific shape (Patent Document 3). The spout described in Patent Document 3 has a flange portion to be attached to the inner surface of the hole of the container around the lower portion of the cylindrical peripheral wall, and an opening is formed at the bottom of the cylindrical peripheral wall by tearing with a pull ring The thin part which can be performed is provided, and the one side for carrying out direction regulation is formed in the said flange part. This spout with cap is inserted from the inside into the hole of the paper container and attached with an ultrasonic seal, but since one side of the flange part has a shape that can be regulated in direction, the spout is It is said that it is supplied in a predetermined direction.
JP 2000-6963 A JP-A-5-38772 JP-A-6-92349

  The flange portion is generally made of a synthetic resin and is thermally welded to the container by an ultrasonic welding method or the like. In a paper container containing alcohol or the like as a content, the spout is an essential member so that the content can be taken out a plurality of times after opening. Therefore, it is necessary to be stably fixed to the container during the period of use, and therefore a robust fixing method suitable for this is required.

  However, as described in Patent Literature 1 and Patent Literature 2, the flange portion generally has a spout attached to the carton before the top portion is folded, and the back surface of the spout attachment portion is supported by the anvil, and this state With ultrasonic welding from the top. Therefore, the resin melted by heat may protrude from the outer periphery of the flange and impair the appearance, or may form burrs on the outer periphery of the flange. If the peeled burr is mixed into the contents when the flange is attached to the carton by the internal attachment method, the commercial value is lowered.

  As the shape related to the flange portion when attaching the spout to such a carton, there is only a description relating to the direction restriction when the paper container can be taken, as in Patent Documents 2 and 3, for example. Specifically, as shown in FIGS. 7 and 8, the flange portion described in Japanese Patent Laid-Open Nos. 5-38772 and 6-92349 is assumed to have a circular shape on the outer periphery of the flange. And only a straight line connecting any two points on the circumference and / or a part of the circumference. For example, FIG. 7A shows a spout with a cap described in Japanese Patent Laid-Open No. 5-38772, which has a cylindrical cap 150 in the upper part and a substantially square flange part 140 in the lower part. 7B, when the circumscribed circle of the flange portion 140 is indicated by a dotted line, the rectangular flange portion has four points X1 and X2 provided at positions that divide the circumference of the circumscribed circle into four equal parts. , X2 and X3, X3 and X4, and X4 and X1. Similarly, FIG. 8A shows a spout with a cap described in Japanese Patent Application Laid-Open No. 6-92349, which has a cylindrical cap 150 at the upper part and a flange part 140 made of a square and an arc at the lower part. As shown in FIG. 8 (b), the flange portion of this shape has four points X1 and X2 provided at positions that divide the circumference of the circumscribed circle into four equal parts when the circumscribed circle of the flange portion 140 is indicated by a dotted line. , X2 and X3 and X3 and X4, and the remainder of the circumference between X4 and X1. Thus, the shape of the flange part of the spout with a cap was only very limited.

  In view of the above problems, the present invention is a spout with a cap that is used by being attached to a paper container. The purpose is to provide.

  Moreover, it aims at providing the paper container which attached the said spout with a cap.

  As a result of examining the shape of the spout with a cap attached to the paper container and the heat welding operation in detail, the present inventor found that when the concave portion or the concave portion was provided on the outer periphery of the flange portion, The present invention has been completed by finding that it is possible to escape into the concave portion on the outer periphery, prevent the molten resin from overflowing to the outer peripheral portion of the flange, and prevent the generation of burrs.

  According to the present invention, by simply providing a specific recess in the flange portion, the resin at the time of heat-sealing escapes into the recess to prevent overflow of the molten resin at the time of heat-welding, and the outer periphery of the flange portion is heated uniformly. Fused.

  According to the present invention, overflow of the molten resin at the time of heat welding can be prevented, so that generation of burrs can be prevented, and mixing of burrs into the contents can be easily prevented.

  Further, according to the present invention, by further providing two convex portions on the flange portion, the direction can be regulated, and the opening / closing direction of a pull ring or the like attached to the paper container can be controlled to be constant.

A first aspect of the present invention is a cylindrical portion in which a shielding portion having a pull ring inside is continuously provided, a flange portion provided on a lower outer periphery of the cylindrical portion, and a cap capable of opening and closing an upper surface of the cylindrical portion. The flange portion has a shape in which an outer periphery of a circle having a radius r centered on the center of the flange portion is cut out, and the cutout is on the circumference of the circle. It is a spout with a cap characterized by having 3 to 30 recesses toward the center of the circle with respect to a straight line connecting any two points. In the present invention, there may be a plurality of straight lines connecting any two points on the circumference of the circle, but no contact is made except at the two points. Hereinafter, description will be made with reference to FIG. 1 showing an example of a preferred embodiment of the present invention.

  FIG. 1 (a) is a front view of a spout with a cap according to the present invention, FIG. 1 (b) is a front view of an inlet with the cap removed, and FIG. 1 (c) is a cap according to the present invention. FIG. 1D is a cross-sectional view taken along the line AA of FIG. 1C, and FIG. 1E is a bottom view of the spout with a cap according to the present invention. In FIG. 1, 10 is a pull ring, 20 is a shielding part, 30 is a cylindrical part, 33 is a spiral groove, 35 is a protruding part, 40 is a flange part, 50 is a cap, and 100 is a spout with a cap.

  As shown in FIGS. 1A and 1B, the cylindrical portion 30 is provided with a spiral groove 33 so that a cap capable of opening and closing the upper surface can be coupled with a screw. Further, in order to ensure the integrity with the cap 50, the protruding portion 35 is provided so as to be equal to the cap width. Further, as shown in FIG. 1 (d), a shielding part 20 having a pull ring 10 is continuously provided inside the cylindrical part 30, and a flange part 40 is provided on the outer periphery of the lower part of the cylindrical part 30. Yes. Furthermore, in the present invention, as shown in FIGS. 1C and 1E, the flange portion 40 has a shape in which the outer periphery of a circle having a radius r centered on the center c of the flange portion 40 is cut out. The notch may have at least one recess toward the center of the circle with respect to a straight line connecting any two points on the circumference of the circle, but the two points remain as a part of the flange portion 40. There must be. Therefore, the maximum length of the flange portion is r from the center of the flange portion, and at least two locations r from the center of the flange portion exist in the flange portion. In the present invention, the radius r can be appropriately selected depending on the size of the paper container to which the cap-attached spout is attached and the diameter of the flange portion 40. Generally, it is 30-70 mm. The circle having the radius r is not a circumscribed circle of the flange portion. This is because the outer periphery of the flange portion 40 may not form a circumscribed circle depending on the shape of the notch.

  The bottom view of the spout with a cap is shown in FIG. 2, and the said notch is demonstrated. In FIG. 2, 20 is a shielding part, 40 is a flange part, and c is the center of the flange part. As shown in FIG. 2A, the flange portion is directed toward the circle center c with respect to a straight line BB connecting two arbitrary points X1 and X2 on the circumference of the circle having the circle c as a circle center. At least one recess 60 is provided. The bottom view of the spout with a cap which has the recessed part 60 in FIG.2 (b) is shown. Thus, when the recessed part 60 exists in the flange part 40, when a spout with a cap is heat-welded to a container via a flange part, molten resin wraps around the said recessed part, and molten resin leaks to the outer periphery of a flange part. The product can be prevented from coming out, the aesthetics can be improved, the occurrence of burrs can be prevented, the fall to the contents can be avoided, and the safety of the product can be improved.

The notch is a recess 60 directed to the center of the circle with respect to a straight line connecting any two points on the circumference of the circle, and the recess 60 is formed by a curve even if formed by a straight line. Alternatively, it may be formed from a straight line and a curved line. Further, if there is a concave portion 60 that goes to the center of the circle with respect to a straight line that connects two arbitrary points on the circumference of the circle, the convex portion that goes to the circumference with respect to the straight line may be included. Therefore, the number of recesses 60 is not limited to one in one straight line. FIG. 3 shows a bottom view of the spout with a cap of the present invention. FIG. 3A shows a case where there is one triangular recess 60 formed by two straight lines from the line BB connecting any two points on the circumference toward the circle center c. FIG. 3B shows a case where there are four triangular concave portions 60 formed in a straight line from the straight line BB toward the circular center c, and three triangular convex portions. 3 (c) shows a case where there are three arc-shaped concave portions 60 formed by a curve from the straight line BB toward the circle center c and two arc-shaped convex portions 70. Such concave portions 60 can be provided at a plurality of locations on the circumference, and in FIG. 3 ( d ), a triangular concave portion 60 formed in a straight line from the straight line BB toward the circular center c, and a curve The bottom view of the spout with a cap which has the circular arc-shaped recessed part 60 formed by is shown. Thus, in this invention, if the recessed part 60 has a recessed part which goes to the said circle center c with respect to the straight line which connects arbitrary two points on the circumference of a circle, there will be no restriction | limiting in the shape. This is because the molten resin can be prevented from flowing out toward the recess regardless of the shape and leaking out to the outer periphery of the flange portion.

  On the other hand, in the present invention, arbitrary two points on the circumference of the circle are at positions where the center angle of the circle center c is 5 to 90 °, preferably 10 to 80 °, particularly preferably 20 to 60 °. It is preferable. FIG. 4 shows a bottom view of the spout with a cap according to the present invention. Arbitrary two points X1 and X2 of the flange portion 40 are present at an angle of 45 ° with respect to the center point c. A straight line B-B connecting these two points has a concave portion toward the circle center c. If the angle is less than 5 °, the molten resin may be difficult to escape into the recess. On the other hand, if it exceeds 90 °, it may be difficult to stably attach to the container during heat welding. In the present invention, any two points can be provided uniformly on the circumference, and the straight line connecting the two points may both have concave portions having the same shape. FIG. 4B shows the shape of the flange portion 40 in which two arbitrary points are continuously provided with a central angle θ of 20 °, and both have concave portions having the same shape. Further, FIG. 4C shows a flange shape having a concave portion toward the center point c in a straight line connecting at least one of the two points having a center angle θ of 60 °. In FIG. 4C, in the straight line connecting the two points, there is a concave portion toward the central point c, but there is no convex portion toward the circumferential side.

  In the present invention, at least one of the two points is preferably located at a central angle θ30 to 90 °, and has a recess toward the circle center c with respect to a straight line connecting the two points. It is preferable that there are no convex portions toward the circumferential side. This is because the two points exist at an equal distance of “r” from the center of the flange portion, and the direction of the flange portion can be controlled by these two points regardless of the shape of the other portions. . Specifically, the spout with cap is welded to the container after the flange portion is heated by an ultrasonic welding apparatus. If any two points are present at the central angle θ30 to 90 °, When the spout with a cap is set, the direction can be regulated by the two points, and the spout can be supplied in a predetermined direction. Thereby, for example, the opening direction of the pull ring 10 can be aligned and attached to the container. In addition, it is possible to prevent the molten resin from flowing toward the concave portion and leaking the molten resin to the outer periphery of the flange portion.

  Further, the shape of the flange portion is not particularly limited as long as it has at least one of the concave portions. The bottom view of the other aspect of the spout with a cap of this invention is shown in FIG. For convenience, in FIG. 5, the outer periphery of a circle having the center of the flange portion as the center of the circle is indicated by a dotted line, and a straight line connecting any two points on the periphery of the circle having the center of the circle c is indicated by a thin line. As shown in FIG. 5 (a), the circle may be divided into eight equal parts, and the recesses 60 directed toward the circle center c may be provided evenly on the circumference with respect to straight lines connecting the points. 5B, a part of the circumference may be a part of the outer periphery of the flange portion 40, and the straight line may be an outer periphery of the flange portion 40 as shown in FIG. It may be a part of Furthermore, as shown in FIG. 5 (d), a curve protruding to the circumferential side can be included as a part of the outer periphery of the flange portion with respect to a straight line connecting arbitrarily two points indicated by L1, and indicated by L2. A straight line connecting any two points may be a part of the outer periphery of the flange portion. Further, as described above, in the present invention, a straight line connecting any two points on the circumference of the circle does not contact other than the above two points on the circumference. However, with respect to one straight line connecting these two points, You may have a notch which goes to the center c, and you may have the curve beyond the circle center c with respect to the same straight line. This mode is shown in FIG. In FIG.5 (e), while having the notch 60 of this invention, the outer periphery of the flange part 40 is formed of the curve L3 exceeding the circle center c.

  In the present invention, the number of the recesses 60 is not limited as long as it is 1 or more, preferably 1 to 50, more preferably 3 to 30, and particularly preferably 5 to 20. The plurality of recesses 60 may be arranged evenly or unevenly.

  The aspect of the bottom view of the preferable spout with a cap of this invention is shown to Fig.6 (a), (b), (c), (d). FIG. 6A shows the outer periphery of the flange portion in which a large number of circular arc recesses 60 are formed evenly on the circumference, and FIG. 6B shows the outer periphery of the flange portion as an outer periphery of the arc recess 60. And two arbitrary points on the circumference of the circle are directed to the circle center c with respect to a straight line at a central angle of 30 to 90 ° of the circle center. FIG. 6 (c) shows a structure in which concave portions are formed, and FIG. FIG. 6 (d) shows the shape of the flange portion shown in FIG. 5 (a). The flange portion is formed of eight concave portions 60 with the circumference evenly distributed. In the present invention, as shown in FIGS. 6 (a), 6 (b), and 6 (c), maintaining a substantially circular shape as a whole facilitates rolling and suppresses clogging in the parts feeder when attached to the container. it can. Further, when the flange portion 40 is rectangular or the like, it is easy to curl, which makes it difficult to attach to the container. However, when the flange portion 40 is substantially circular, such curling can be effectively prevented.

  The spout with a cap of the present invention is not limited to other shapes as long as it has the flange portion 40 having the shape described above. Therefore, the cylindrical portion 30 is not limited to a cylindrical shape, and may be elliptical, and the cylindrical portion 30 may not have the spiral groove 33. This is because the upper surface of the cylindrical portion 30 can be integrated with the cap 50 without such a groove 33, and the upper portion can be opened and closed. Also, the material of the spout is not limited, and low density polyethylene resin, medium density polyethylene resin, high density polyethylene resin, linear low density polyethylene resin, polyolefin resin such as polypropylene resin, polystyrene resin, ionomer, acrylic resin , Nylon, polyester resin, polycarbonate resin and other heat-fusible resins.

  The second of the present invention is a paper container having the above-described spout with a cap.

  The container to which the spout with a cap of the present invention is attached is generally a container having a heat seal layer made of a polyolefin resin such as polyethylene on the surface of a paper substrate. Other than the shape of the flange portion, it can be attached to the container by a conventional method of attaching a spout with a cap. In general, the capped spout is transferred to an ultrasonic welding apparatus by a long parts feeder, where the flange is heated and then welded to the container. At this time, for example, as shown in FIG. 6B, if the flange portion 40 is substantially circular, clogging in the parts feeder can be prevented, and if there are two convex portions 70, the convex portion 70 is long. The direction of the spout with a cap can be controlled because it is aligned with the wall side of the part feeder of the scale, and for example, the opening / closing direction of the pull ring 10 can be controlled in a fixed direction.

It is explanatory drawing of the spout with a cap of this invention. FIG. 1 (a) is a front view of a spout with a cap according to the present invention, FIG. 1 (b) is a front view of an inlet with the cap removed, and FIG. 1 (c) is a cap according to the present invention. FIG. 1D is a cross-sectional view taken along the line AA of FIG. 1C, and FIG. 1E is a bottom view of the spout with a cap according to the present invention. It is a bottom view of a spout with a cap of the present invention, and is a figure explaining a straight line which connects two arbitrary points on the circumference of a circle, and a crevice which goes to the circle center to the straight line. It is a bottom view of the spout with a cap of this invention, and is a figure explaining the shape of the notch part in this invention. It is a figure which shows the bottom view of the spout with a cap of this invention, and demonstrates that arbitrary two points on the circumference exist in the position of center angle (theta) of the center of a circle. It is a bottom view of other modes of a spout with a cap of the present invention. It is a bottom view of the preferable spout with a cap of this invention. It is a figure explaining the spout with a cap of Unexamined-Japanese-Patent No. 5-38772. It is a figure explaining the spout with a cap of Unexamined-Japanese-Patent No. 6-92349.

Explanation of symbols

10 ... Pull ring,
20 ... shielding part,
30 ... Cylindrical part,
33 ... spiral groove,
35 ... Projection of the cylindrical part,
40 ... flange part,
50 ... Cap,
60 ... concave portion,
70 ... convex part,
100: spout with cap,
140 ... flange part,
150: Cap.

Claims (7)

The spout is composed of a cylindrical portion provided with a shielding portion having a pull ring inside, a flange portion provided on a lower outer periphery of the cylindrical portion, and a cap capable of opening and closing the upper surface of the cylindrical portion. And
The flange portion has a shape in which an outer periphery of a circle having a radius r centered on the center of the flange portion is cut out, and the notch is in a straight line connecting any two points on the circumference of the circle. And 3 to 30 recesses facing the center of the circle.   The spout with a cap according to claim 1, wherein the concave portion is formed of a straight line and / or a curved line. 3. The spout with a cap according to claim 1, wherein any two points on the circumference constituting the notch are located at a central angle of 20 to 60 ° with respect to the center of the circle. The cap according to any one of claims 1 to 3, wherein at least one of the cutouts has an arbitrary two points on the circumference at a central angle of 30 to 90 degrees with respect to the center of the circle. With spout.   The spout with a cap according to claim 1, wherein the flange portion is made of a heat-fusible resin.   The spout with a cap according to any one of claims 1 to 5, wherein the flange portion is attached to an inner surface of a punched hole of a paper container.   The paper container which has a spout with a cap in any one of the said Claims 1-6.

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