JP2007230608A - Spout for paper pack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an attractive spout of a paper pack which damages neither a thin wall of an unsealing score or others at the time of an ultrasonic welding nor a location of insufficient fastening or the fixture of an outer cap, and facilitates its production control. <P>SOLUTION: The outer cap 6 is detachably screwed on a spout body 5 comprised of a base 7 press fitted into a mounting hole 4 of the paper pack 2, a flange 8 which is extended outward from the lower end of the base 7 and welded on the top 3 of the paper pack 2 in the rim of the mounting hole 4, and a spout tube 10 which is arranged upright from the base 7, has an inner periphery the same as the inner periphery of the base 7 and forms a screw thread 9 on its outer periphery. The spout tube 10 is sealed by a sealing plate 13 having the unsealing score 11 and a pull-ring 12 arranged inside the score 11. The outer cap 6 can be screwed into the spout tube 10 by inserting and fixing a tool into a plurality of material chipping-off sections 14 so that the plurality of material chipping-off sections 14 are arranged on the whole inner periphery of the base 7 at regular intervals. Thus, the sealing of the spout can be attained so that vibration triggered by ultrasonic waves is absorbed by the material chipping-off sections 14 and ribs 21 located among the material chipping-off section 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a paper pack spout with improved paper pack pouring and resealability, and more specifically, the opening score portion and other thin-walled portions are not damaged even when sealed with ultrasonic waves, and When screwing the outer cover onto the spout tube of the spout body, the base and jig are engaged so that the outer cover can be screwed in a state where the spout body is fixed. It relates to a spout for a paper pack that is made possible.

Paper packs are usually used as containers for juices, seasonings, liquors, etc., and spouts are attached to improve the pouring and resealing properties. For example, as shown in FIG. 4, a mounting hole is provided in the top 51 of the paper pack 50, and a spout 52 is welded to the mounting hole using ultrasonic waves. Enhances resealability. However, when the spout 52 is ultrasonically welded to the mounting hole of the paper pack 50, the score for opening the spout 52 and other thin portions may be damaged. Under such circumstances, the following are known as spouts for paper packs that prevent this damage.
JP 2002-2758 A Japanese Patent Laid-Open No. 2004-67101

  As shown in FIG. 5, the spout for a paper pack of Patent Document 1 has a pedestal 55 in which a flange portion 54 that is ultrasonically welded to a mounting hole 53 in a top portion 51 of the paper pack 50 is extended to the outer peripheral edge portion thereof. A pour cylinder 57 standing on the inner periphery of the pedestal 55 and screwing the outer lid 56 on and off, an annular opening score 58 on the inner peripheral side of the pedestal 55, and the inner peripheral side of the opening score 58 A sealing plate 60 provided with a pull ring 59 standing upright and sealing the pouring cylinder 57. An inner diameter 55A of the pedestal 55 is set to 20 mm or less, and an intersecting portion where the pedestal 55 and the flange portion 54 intersect is formed. As a curved surface of R0.2 or more, it further has a gap portion 61 having a score height 58A formed by the bottom surface of the base 55 and the lower surface of the opening score 58 of 2.3 mm or more, in addition to an annular opening. Width L of score 58 is 0.2 to 0.5mm Range and to and the thickness N of the sealing plate 60 is obtained by a 1.5mm or less. Accordingly, the spout for paper pack can be ultrasonically welded to the mounting hole 53 of the paper pack 50 without damaging the annular opening score 58 or the intersecting portion, and can be sealed very well.

  In addition, as shown in FIG. 6, the spout for paper packs of Patent Document 2 has a pour cylinder 57 provided upright on the inner peripheral edge of the upper surface of a pedestal 55 having a flange 54 on the outer peripheral surface of the lower end. An outer cover 56 is screwed on and removed from the cylinder 57, and a sealing plate 60 is provided on the inner and lower side of the dispensing cylinder 57. The sealing plate 60 has an annular opening score 58 and an inner periphery of the opening score 58. A ring ring 62 on the lower surface of the pedestal 55, and the thickness e of the sealing plate 60 outside the opening score 58 on the inner lower side of the dispensing cylinder 57. The sealing plate 60 on the inner side of the opening score 58 is thinner than the thickness E. The annular opening score 58 is damaged due to the synergistic effect of the action caused by making the thickness e of the sealing plate 60 outside the annular watermark 62 and the opening score 58 thinner than the thickness E of the inner sealing plate 60. There is no problem, and a spout for paper pack is ultrasonically welded to the mounting hole 53 of the paper pack 50 to seal it very well.

  The spout for a paper pack disclosed in Patent Document 1 is screwed with an outer lid 56 to a dispensing cylinder 57, although the annular opening score 58 is not damaged when ultrasonically welding to the mounting hole 53 of the paper pack 50. When fixing, the flange portion 54 and the pedestal 55 are fixed. However, it is difficult to fix the flange portion 54 and the pedestal 55, and the outer lid 56 is likely to be insufficiently tightened. It becomes a neck and looks bad.

  Similarly to Patent Document 1, the spout for paper packs of Patent Document 2 does not damage the annular opening score 58 during ultrasonic welding, but it is difficult to fix the flange portion 54 and the pedestal 55. Insufficient tightening of the lid 56 is likely to occur, and there is a risk of scratching the above-mentioned fixing portion, which may become a bottleneck in production management or deteriorate in appearance.

  Therefore, the object of the present invention is not to damage the opening score part and other thin-walled parts during ultrasonic welding, and it is easy to manage production without undertightening the outer lid or scratching the fixing part. It is to provide a spout for a paper pack having a good appearance.

The present invention has been proposed in order to achieve the above object, and is characterized by having the following configuration.
That is, according to the present invention, there is provided a spout for a paper pack that is attached in a welded state to the attachment hole at the top of the paper pack, the spout comprising an annular pedestal that is pressed into the attachment hole from below, A flange portion that extends outward from the lower end of the pedestal and is welded to the inner surface of the top of the paper pack at the periphery of the mounting hole, and has an inner periphery that is erected upward from the pedestal and has the same inner periphery as the inner periphery of the pedestal, and a thread on the outer periphery A spout body formed of a spout body, and an outer lid screwed into the spout body of the spout body. The spout body of the spout body has an annular opening score and the opening Are sealed by a sealing plate provided with a pull ring standing on the inner peripheral side of the score, and a plurality of inner peripheral surfaces of the pedestal below the sealing plate are provided at intervals in the circumferential direction over the entire periphery. Spa for paper packs, characterized in that a thinned portion is formed Door is provided.

  According to the present invention, the lightening portions are arranged at equal intervals and at equal widths, and eight to sixteen lightening portions are provided, and the total width of the lightening portions is equal to the inner circumference of the pedestal. A spout for paper packs that is 30-80% of the length is provided.

  Further, according to the present invention, there is provided a paper pack spout in which the lightening portion is formed into a shape in which the lightening portion is slanted from above to below.

  Moreover, according to this invention, the spout for paper packs whose distance of the said base bottom face and a sealing board is 5 mm or more is provided.

  That is, according to the present invention, the spout body pedestal is press-fitted into the mounting hole in the top of the paper pack, the flange is aligned with the inner surface of the top of the paper pack around the mounting hole, and ultrasonic waves are applied to the mating surface. However, the plurality of lightening portions formed on the inner peripheral surface of the pedestal of the spout body and the ribs between the lightening portions absorb vibration. Therefore, there is an effect that the opening score portion and other thin portions are not damaged. Moreover, when screwing the outer lid onto the spout tube of the spout body, the spout body can be fixed and the outer lid can be screwed by inserting jigs into the plurality of lightening portions of the pedestal. Therefore, there is an effect that the outer lid is not tightly tightened or the fixing portion is not damaged, the production management is easy, and the appearance is good. In addition, the presence of a plurality of cutout portions has an effect of reducing the amount of material.

  Further, according to the present invention, when the outer lid is screwed onto the spout tube of the spout body, the spout body is fixed by inserting jigs into a plurality of lightening portions arranged at equal intervals and equal widths on the base. The outer lid can be screwed. Therefore, in addition to the above effects, there is an effect that the jig can be formed into a certain shape.

  Further, according to the present invention, when the outer lid is screwed onto the spout tube of the spout body, the jig is inserted into the thinned portion that is slanted from the top to the bottom of the base, thereby fixing the spout body. The outer lid can be screwed. Therefore, in addition to the above effects, there is an effect that the mass of the pedestal can be secured and the amount of material can be reduced while securing the usability of the jig.

  In addition, according to the present invention, the flange portion is aligned with the inner surface of the top of the paper pack around the periphery of the mounting hole, and when the ultrasonic wave is irradiated to the mating surface, the vibration occurs. As a result, the influence of the vibration propagating from the flange portion to the pedestal and further to the dispensing cylinder is reduced. Therefore, the above effect can be obtained with certainty.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a state in which a spout for a paper pack of the present invention is mounted on the top of the paper pack, and FIG. 2 is a longitudinal section in a state where an outer lid is removed from the spout for a paper pack of the present invention. FIG. 3 is a rear view of the paper pack spout of the present invention, and FIG. 4 is a perspective view showing a state in which the paper pack spout is mounted on the top of the paper pack. In these drawings, a spout 1 for a paper pack is made of a resin capable of ultrasonic welding, and a spout main body 5 to be attached in a welded state to a mounting hole 4 in the top 3 of the paper pack 2, and the spout main body 5. It comprises an outer lid 6 to be screwed on and off.

The spout body 5 includes an annular pedestal 7 that is pressed into the mounting hole 4 of the paper pack 2 from below, and a top portion of the paper pack 2 that extends outward from the lower end of the pedestal 7 and is at the periphery of the mounting hole 4. 3 comprises a flange portion 8 to be welded to the inner surface, and a pouring cylinder 10 which is erected upward from the pedestal 7 and has the same inner circumference R2 as the inner circumference R1 of the pedestal 7 and has a thread 9 formed on the outer circumference. The spout tube 10 of the spout body 5 is sealed by a sealing plate 13 having an annular opening score 11 and a pull ring 12 standing on the inner peripheral side of the opening score 11. 13 is formed on the inner peripheral surface of the lower pedestal 7 with a plurality of lightening portions 14 provided at intervals in the circumferential direction over the entire circumference.
The distance D between the lower surface of the opening score 11 and the lower surface of the pedestal is 5 mm.

  The pedestal 7 of the spout body 5 has an annular shape as described above, and the flange portion 8 extends on the outer periphery of the lower end portion thereof, so that it can be temporarily fixed to the mounting hole 4 of the paper pack 2 above the flange portion 8. Four locking projections 20 are formed at equal intervals in the circumferential direction, and a dispensing tube 10 is erected on the upper end. As shown in FIG. 3, a plurality of uniform width thinning portions 14 are formed and arranged at equal intervals in the circumferential direction on the inner peripheral surface of the pedestal 7. There are twelve thinned portions 14 at equal intervals, and the inner peripheral surface of the pedestal 7 is thinned in an inclined shape from above to below, that is, as shown in FIGS. Thus, they are the same in shape and dimensions. In addition, the twelve thinned portions 14 are present at equal intervals over the entire circumference of the inner peripheral surface of the pedestal 7, so that twelve equal-width ribs 21 are formed and arranged at equal intervals in the circumferential direction. become. In addition, especially the thickness reduction part 14 is not limited that the shape is equal intervals and equal width, and also the quantity is not limited.

  When the outer lid 6 is screwed to the spout cylinder 10 of the spout body 5 by the presence of the thinned portions 14 and the ribs 21 formed thereby, a plurality of parts arranged at equal intervals and at equal widths on the pedestal 7 are provided. By inserting a jig (not shown) into the meat removal portion 14, the spout body 5 can be fixed and the outer lid 6 can be screwed. Therefore, insufficient tightening of the outer lid 6 or damage to the fixing portion is prevented, the production control is easy and the appearance is good, and in addition, the amount of material can be reduced by the plurality of the lightening portions 14, and the jig Can be made into a fixed shape.

  In FIG. 3, twelve examples of the lightening portions 14 are shown, and the number of the lightening portions 14 is not particularly limited as described above, but the lightening portions 14 are preferably provided in the range of 8 to 16. The total width of these thinned portions 14 is preferably in the range of 30 to 80% of the inner peripheral length of the base 7. Therefore, the number of the ribs 21 described above is the same as that of the thinned portions 14, and the total width of the ribs 21 is 20 to 70% of the inner peripheral length of the base 7.

  The flange portion 8 has a thin bowl shape and is ultrasonically welded to the mounting hole 4 of the top portion 3 of the paper pack 2. Therefore, the area and shape of the flange portion 8 are determined depending on whether the necessary strength can be obtained at the time of ultrasonic welding.

  As described above, the dispensing tube 10 is erected on the pedestal 7, and the lower part is closed by the sealing plate 13, and the sealing plate 13 is provided with an annular opening score 11. A pull ring 12 is erected on the inner periphery side of the score 11 for use. The pull ring 12 includes a support 22 and a ring 23. By pulling the finger 23 on the ring 23 with the anti-slip 24, the opening score 11 is torn and the sealing plate 13 is opened.

  Based on the above description of the spout body 5, when the spout body 5 is ultrasonically welded to the paper pack 2, the plurality of lightening portions formed on the inner peripheral surface of the pedestal and the ribs between the lightening portions are scored for opening. Since the ultrasonic vibration transmitted from the flange reaches the opening score because it is arranged at a lower position, the vibration due to the meat removal part and the rib between the meat removal parts is absorbed to some extent and weakened. Can be effectively prevented. Further, the distance between the lower surface of the opening score 11 of the sealing plate 13 which is the bottom plate of the dispensing cylinder 10 and the bottom surface of the pedestal 7 is set to 5 mm or more, so that vibration propagates from the flange portion to the pedestal and the dispensing cylinder. Therefore, the safety factor of the effect of the rib portion and the rib between the meat portion can be further increased.

  The outer lid 6 includes an outer cylinder 31 and an inner ring 32 which are sequentially arranged on the top plate 30 concentrically from the outside. The outer cylinder 31 is formed with a thread 33 along the thread 9 of the pouring cylinder 10 on the inner peripheral surface thereof, so that the outer cylinder 31 is detachable and cooperates with the pouring cylinder 10 to prevent internal and external contamination. Is responsible. The inner ring 32 has a tip portion fitted into the dispensing tube 10 for sealing, so that the content liquid of the paper pack 2 does not leak to the outside, and cooperates with the outer tube 31 to provide an inner and outer surface. It also plays a role in preventing pollution. A slip stopper 34 is provided on the outer peripheral surface of the outer cylinder 31.

Next, a method of using the paper pack spout 1 configured as described above will be described in detail.
First, since the spout body 5 and the outer lid 6 are molded separately, the outer lid 6 is screwed onto the spout body 5. At this time, a jig is inserted into the lightening portion 14 below the pedestal 7 and the spout body 5. Then, the outer lid 6 is capped to the dispensing cylinder 10. Therefore, there is no shortage of tightening of the outer lid 6 and no damage is caused to the fixed portion. Next, the base 7 of the spout body 5 is press-fitted into the mounting hole 4 in the top 3 of the paper pack 2, the flange 8 is aligned with the inner surface of the top 3 around the mounting hole 4, and ultrasonic sealing is performed on the mating surface. The horn 35 of the machine is applied and welding is performed by irradiating ultrasonic waves. At that time, the spout 1 as a whole vibrates through the flange portion 8, but the vibration absorption by the thinned portion and the rib between the thinned portions, and the distance between the lower surface of the opening score 11 and the bottom surface of the base 7 are sufficient. By reducing the influence of vibration, the opening score 11 and other thin portions are not damaged.

  In this way, the paper pack 2 on which the paper pack spout 1 is mounted is delivered to the consumer, and the consumer fills the paper pack 2 with the content liquid, seals the filling port, and ships as a product. The final consumer who purchased the product unscrews the outer lid 6, pulls the pull ring 12 with his / her fingers, tears the opening score 11, opens the paper pack 2, and removes the content liquid from the dispensing cylinder 10. Use pour out. When the content liquid is still left after use, the outer lid 6 is screwed onto the dispensing tube 10 to prepare for reuse.

  Although the first embodiment of the present invention has been described above, it should be understood that the specific configuration is not limited to this, and that changes can be made as appropriate without departing from the scope of the present invention.

  The present invention has high applicability in order to enhance the pouring property and resealability of the paper pack in order to prevent damage to the opening score portion and other thin-walled portions when ultrasonically welding the spout. The applicability is extremely high when it is desired to make the production control easy and to improve the appearance by preventing the outer lid from being tightly tightened or scratching the fixing portion.

It is a longitudinal cross-sectional view which shows the state with which the spout for paper packs shown in Example 1 of this invention is mounted | worn with the top part of the paper pack. It is a longitudinal cross-sectional view of the state which removed the outer cover from the spout for paper packs shown in Example 1. FIG. It is a reverse view of the spout for paper packs shown in Example 1. It is a perspective view which shows the state with which the spout for paper packs is mounted | worn with the top part of the paper pack. It is a longitudinal cross-sectional view which shows the example of the conventional paper pack. It is a half-cut longitudinal cross-sectional view which shows the example of the conventional paper pack.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spout for paper packs 2,50 Paper pack 3,51 Top part 4,53 Mounting hole 5 Spout main body 6,56 Outer lid 7,55 Base 8,54 Flange part 9,33 Thread 10,57 Extraction cylinder 11, 58 Opening score 12, 59 Pull ring 13, 60 Sealing plate 14 Meat removal part 20 Locking projection 21 Rib 22 Post 23 Ring 24, 34 Non-slip 30 Top plate 31 Outer cylinder 32 Inner ring 35 Ultrasonic sealing machine horn 52 Spout 55A, 58A, R1, R2 Inner Diameter 61 Clearance E, e Thickness L Width D Distance N Thickness

Claims (4)

A spout for a paper pack to be attached in a welded state to a mounting hole at the top of the paper pack,
The spout includes an annular pedestal that is press-fitted into the mounting hole from below, a flange that extends outward from the lower end of the pedestal and is welded to the inner surface of the top of the paper pack around the mounting hole, and upward from the pedestal. A spout tube standing upright and having the same inner periphery as the inner periphery of the pedestal and having a thread formed on the outer periphery, and a spout body, and an outer lid screwed into the spout cylinder of the spout body, Consists of
The spout cylinder of the spout body is sealed by a sealing plate having an annular opening score and a pull ring standing on the inner peripheral side of the opening score, and the inner periphery of the base below the sealing plate A spout for paper packs, characterized in that a plurality of thinned portions are formed on the surface at intervals in the circumferential direction over the entire circumference.   The said lightening part is arrange | positioned at equal intervals and equal width | variety, The thickness reduction part is provided 8 thru | or 16 pieces, and the total width | variety of a lightening part is 30 to 80% of the inner peripheral length of a base. The spout for paper packs according to claim 1.   The spout for a paper pack according to claim 1 or 2, wherein the lightening portion has a shape that is thinned in an inclined shape from above to below. The spout for a paper pack according to any one of claims 1 to 3, wherein a distance between the bottom surface of the base and the lower surface of the opening score is 5 mm or more.

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