JP5753653B2 - 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. 6 shows an example of the packaging container 1000 provided with the spout stopper 600. The spout stopper 600 includes a spout 601 fixed to the packaging container 1000 and a cap 602 that can be attached to and detached from the spout 601.

  FIG. 7 schematically shows a cross-sectional view of the spout stopper 600. The spout 601 includes a base portion 608, a side wall 607, a flange 604, a partition wall 606 and a pull ring 603. The spout 601 projects the side wall 607 from the inside of the packaging container to the outside of the mounting hole provided in the packaging container 1000, and the ultrasonic sealing method connects the flange 604 provided on the outer edge of the base portion 608 and the inner wall of the packaging container 1000. It is fixed by welding by etc. Further, the partition wall 606 ensures the hermeticity of the packaging container 1000. The partition wall 606 is provided with an annular cut 605, and a pull ring 603 is connected to the inside thereof. When the user pulls the pull ring with a finger, the partition wall 606 is torn along the notch 605 and opened. After opening, the partition 606 cannot be restored, but can be resealed by screwing the cap 602 onto the side wall 607.

  In such a spout stopper 600, when the flange 604 and the inner wall of the packaging container 1000 are ultrasonically welded, ultrasonic waves are transmitted to places other than the flange 604, and the shape changes or the thin-walled portion breaks. In some cases, the quality may be deteriorated, such as where the contact points are welded together. In order to prevent this, the following techniques are disclosed.

  In Patent Document 1, an annular rib is provided at the welding location of the flange 604, the contact area between the flange 604 and the packaging container 1000 is reduced, and welding can be performed with less energy. A technique for reducing the influence of sound waves is disclosed.

  In Patent Document 2, a circular watermark portion is formed in the base portion 608, and the thickness outside the annular cut 605 provided in the partition wall 606 is made thinner than the thickness inside the cut 605, so that the cut 605 is provided. The technique which makes it difficult to transmit an ultrasonic wave and prevents the partition wall 606 from breaking at the location where the notch 605 is provided is disclosed.

JP 2000-296865 A Japanese Patent Laid-Open No. 2004-67101

  When the spout 601 is welded to the packaging container 1000, it is general that the cap 602 is screwed to the spout 601 in advance before the spout 601 is passed through the mounting hole. This is because it is necessary to protect the shape of the pull ring 603 and the side wall 607 of the spout 601 when passing through the mounting hole, and because of the operation of the capper which is a device for screwing the cap 602 to the spout 601, it is welded to the packaging container 1000. After that, it is because it is more difficult to screw the cap 602 to the spout 601 than to screw it before welding.

  Therefore, the spout 601 and the cap 602 are integrated with each other at the time of welding by ultrasonic waves. At this time, when a part of the pull ring 603 is in contact with the top surface of the cap 602, ultrasonic waves are transmitted to the contact location, and there is a possibility that welding may occur.

  Further, since the cap 602 is screwed at a high speed by the capper, the shape of the pull ring 603 may be distorted. For this reason, conventionally, the height of the pull ring 603 from the partition wall is lowered so that the pull ring 603 and the top surface of the cap 602 do not come into contact with each other, and thus there is a problem that it is difficult to put a finger on the pull ring 603.

  Therefore, an object of the present invention is to provide a spout stopper that can easily put a finger on a pull ring while preventing welding and shape change of unnecessary portions.

One aspect of the present invention is a spout formed of a cap and a spout welded to a packaging container, the spout being a cylindrical side wall to which the cap is screwed, a partition wall for closing the inside of the spout, An opening pull ring connected to the peripheral edge of the partition wall and protruding at least partially from the side wall; and a flange connected to the side wall and welded to the inner surface of the edge of the mounting hole of the packaging container. The entire circumference of the far end is on the same plane perpendicular to the screw rotation axis of the cap, and comes into contact with the top surface inside the cap when the screwing is completed.

The cap includes an inner ring that contacts and fits to the inner wall of the side wall when screwing is completed, and a thick portion formed by making the thickness of the outer region adjacent to the inner ring larger than the thickness of the top surface of the cap. The entire circumference of the end portion of the side wall is in contact with the inner surface of the thick portion inside the cap when the screwing of the cap is completed.

Another aspect of the present invention is a packaging container provided with the above-described spout stopper.

  ADVANTAGE OF THE INVENTION According to this invention, the spout stopper which is easy to put a finger on a pull ring can be implement | achieved, preventing the welding and shape change of an unnecessary location.

Sectional drawing of the spout stopper which concerns on the 1st Embodiment of this invention Sectional drawing of the spout which concerns on the 1st Embodiment of this invention. Diagram showing conventional issues The figure which shows the comparative example for verifying the effect of the 1st Embodiment of this invention Sectional drawing of the spout stopper which concerns on the 2nd Embodiment of this invention Figure showing a packaging container with a spout Cross section of conventional spout stopper

(First embodiment)
FIG. 1 is a sectional view of a spout stopper 100 according to the first embodiment of the present invention, and FIG. 2 is a sectional view of a spout 101 when a cap is not screwed.

  The spout stopper 100 includes a cap 102 and a spout 101. A partition wall 106 is provided inside the spout 101 and closes the spout 101. A pull ring 103 for opening is formed from the partition wall 106. A part of the top surface side of the cap 102 of the pull ring 103 protrudes outward (upper side in FIG. 1) from the side wall 107 of the spout 101. The partition wall 106 is provided with an annular cut 105 for easy opening. The spout 101 includes a flange 104 on the opposite side of the pull ring 103 with the partition wall 106 interposed therebetween. The spout 101 is fixed to the packaging container by welding the flange 104 to the inner surface of the edge of the mounting hole of the packaging container.

  The cap 102 and the spout 101 are usually formed by injection molding using a thermoplastic resin such as polypropylene or polyethylene. In addition, the packaging container is formed of a material obtained by laminating aluminum foil, polyethylene, polyethylene terephthalate film, or the like on paper or other flexible packaging materials as in the conventional case.

  The height of the pull ring 103 is set so that the entire circumference of the end of the pull ring 103 is in contact with the top surface of the cap 102 when the cap 102 is screwed. Since the entire circumference of the end of the pull ring 103 is in contact with the cap 102, the ultrasonic energy transmitted to the partition wall 106 during ultrasonic welding is dispersed to the cap 102 side via the pull ring 103. The risk of breaking at the location where the notch 105 is provided is even lower than before. Further, since the pull ring 103 and the top surface of the cap 102 contact with a line instead of a point, the ultrasonic energy does not concentrate locally at a part of the contact portion, and the pull ring 103 is welded to the cap 102. Is prevented.

  When the cap 102 is not screwed, the entire circumference of the end of the pull ring 103 that contacts the top surface of the cap 102 is on the same plane perpendicular to the rotation axis of the cap. As a result, as the cap 102 is screwed, the top surface of the cap 102 and the surface including the entire circumference of the end of the pull ring 103 approach each other in parallel. The surface is simultaneously contacted and then pushed into the partition wall while maintaining the contact, and screwing is completed. When the cap 102 is opened, the pull ring 103 is lifted and it is easy to put a finger on it.

  The reason why the entire circumference of the end of the pull ring 103 is simultaneously brought into contact with the top surface of the cap 102 will be described below.

  FIG. 3 is a diagram schematically illustrating a problem that occurs when the surface including the entire circumference of the end portion of the pull ring 103 is not orthogonal to the rotation axis of the cap 102. In this case, as the cap 102 is screwed, one place of the pull ring 103 first comes into contact with the top surface of the cap 102 ((a) in FIG. 3). The contact portion of the pull ring 103 receives a twisting force in the rotation direction of the cap 102 due to a frictional force with the top surface of the cap 102. This force continues to act while distorting the shape of the pull ring 103 ((b) of FIG. 3). The cap 102 is screwed at a high speed by the capper, and the distortion of the shape of the pull ring 103 continues to increase, and the pull ring 103 is finally screwed into the inside ((c) of FIG. 3). It is difficult to take out the pull ring 103 from this screwed state, and if the screwed pull ring 103 is in contact with any part inside the spout 101, the contact part is welded. Sometimes. In such a case, it becomes a defective product. Thus, when any one part of the pull ring 103 first contacts the inner top surface of the cap 102 as the cap 102 rotates, the entire periphery of the end of the pull ring 103 is in contact with the inner top surface of the cap 102. In such a case, the screwing is not completed and a defective product may be generated.

  On the other hand, when the surface including the entire circumference of the pull ring 103 is orthogonal to the rotation axis of the cap 102, the entire circumference of the end of the pull ring 103 is simultaneously formed on the top surface of the cap 102 as the cap 102 is screwed. Contact. A force for rotationally moving around the rotation axis of the cap 102 acts equally on the entire circumference of the end of the pull ring 103. Therefore, the force does not concentrate on one place as described above, and the pull ring 103 is not twisted in the rotation direction of the cap 102. Therefore, the shape of the pull ring 103 is not greatly distorted, and generation of defective products can be prevented. .

  For verification, when a cap was screwed at a high torque of 60-65 N · cm at a speed of 200 pieces / minute using a 6-head air clutch type capper, in the pull ring 103 of this embodiment, out of 100 pieces, All the pull rings 103 were not twisted. However, as in the pull ring 403 shown in FIG. 4, when a part of the end portion does not contact the top surface of the cap, and the contact portion does not approach in parallel to the top surface of the cap 102, Twisting occurred in the four pull rings 403.

  As described above, the spout plug 100 according to the first embodiment prevents welding of the pull ring 103 and the cap 102 and screwing of the pull ring 103, and makes the entire periphery of the end of the pull ring 103 and the cap 102 contact each other. Can be screwed. This makes it possible to increase the distance from the partition wall 106 to the pull ring 103 as compared with the conventional case where the pull ring 103 cannot be brought into contact with the cap. Therefore, it is possible to easily place a finger on the pull ring 103 and facilitate opening with the pull ring 103. Further, when the spout stopper 100 is welded to the packaging container, the ultrasonic energy transmitted to the partition wall 106 is dispersed more than before, and the risk of the partition wall 106 being broken at the location where the notch 105 is provided is further reduced. be able to.

  In the present embodiment, when the cap 102 is completely screwed, the entire circumference of the end of the pull ring 103 is in contact with the top surface of the cap 102, and the surface including the entire circumference of the end of the pull ring 103 is orthogonal to the rotation axis of the cap. However, when the cap 102 is screwed, the pull ring 103 is not distorted or screwed in. Unless welding or shape change occurs at any place other than the flange 104 at the time of welding, the inside of the cap 102 is out of the entire circumference of the end of the pull ring 103. There may be a portion that does not contact the top surface, and the plane including the portion that contacts the top surface inside the cap 102 may not be strictly orthogonal to the rotation axis of the cap 102.

(Second Embodiment)
FIG. 5 is a view showing a spout stopper 500 according to the second embodiment of the present invention. The description of the same points between the present embodiment and the first embodiment will be omitted, and the differences will be described below.

  The cap 502 of this embodiment further includes an inner ring 511 that contacts and fits to the inner wall of the spout 501 when the screwing is completed. The cap 502 further includes a thick portion (contact ring) 512 in an outer region adjacent to the inner ring. The entire periphery of the end of the side wall 507 of the spout 501 is located at the upper end of the top of the cap 502 from the side wall 107 of the first embodiment so that the top surface of the thick portion 512 comes into contact with the top surface of the thick portion 512 when screwing of the cap 502 is completed. It is formed from the surface.

  When the cap 502 is screwed, the inner ring 511 comes into contact with the inside of the end portion of the side wall 507 of the spout 501, so that the contents of the packaging container are exposed to the outside from the gap between the cap 502 and the spout 501 after opening the partition wall 506. Prevents leakage and realizes sealing performance. The thick portion 512 also improves the sealing performance by contacting the entire circumference of the end portion of the side wall 507 of the spout 501 when the cap 502 is screwed. Further, by forming the thick portion 512, a gap (space) is generated between the lower end of the cap 502 and the pedestal portion provided above the flange 504 of the spout 501. For this reason, even if cooling water or the like used after filling the contents enters the gap, it is likely to be discharged to the outside and easily dried by touching the outside air, and the side wall of the spout 501 507 does not remain on the outer surface or the like.

  In order to enhance the sealing effect, the inner ring 511 and the side wall 507 need to maintain contact with a certain area and pressure when the cap 502 is screwed. For this reason, conventionally, welding has been liable to occur at this location during packaging container mounting processing. In addition, when welding occurs at this location, the force acting on the welding surface when opening the cap 502 is mainly a component in a direction parallel to the welding surface at each location, and the component that pulls the welding surface vertically away Less is. Therefore, the opening torque of the cap 502 becomes large even with slight welding. Therefore, it is important to prevent welding between the inner ring 511 and the side wall 507.

  In the present embodiment, since the cap 502 is provided with the thick portion 512, the cap 502 receives ultrasonic waves while the end of the side wall 507 of the spout 501 is in contact with the top surface of the cap 502. The transmitted ultrasonic energy is distributed to the contact portion and the pull ring 503. Therefore, the energy of the ultrasonic wave concentrated on the contact portion between the inner ring 511 and the inner wall of the side wall 507 of the spout 501 is reduced, and welding can be prevented. In addition, since the end of the side wall 507 of the spout 501 functions as a stopper with respect to the cap 502, the screw 502 complete position can be stabilized, preventing the user from forcibly screwing the cap. To do.

  For verification, the spout stopper 500 having the cap 502 screwed thereto with a torque of 50-55 N · cm is subjected to ultrasonic sealing treatment at a high energy of 220 J (30 KHz, 0.2 seconds), and the cap opening torque thereafter is calculated. As a result of measurement, in the spout stopper 500 of this embodiment, it was 44-50 N · cm. In the spout stopper in which the entire end of the side wall 507 of the spout 501 does not contact the inner top surface of the cap 502, and the entire end of the pull ring 503 contacts the inner top surface of the cap 502, 55-60 N · cm Met. Further, in the spout stopper in a form in which the entire circumference of the end portion of the side wall 507 of the spout 501 is in contact with the top surface of the cap 502, but the entire circumference of the end portion of the pull ring 503 is not in contact with the top surface of the cap 502, cm. Moreover, in the spout stopper 500 of this embodiment, welding did not generate | occur | produce between the side wall 507 of the spout 501 and the inner ring 511, but welding generate | occur | produced in the other spout stoppers.

  As described above, the spout stopper 500 according to the second embodiment reduces the energy of ultrasonic waves transmitted to the inner ring 511 to prevent welding, and prevents the cap 502 opening torque from increasing. Prevention function can be realized.

  In this embodiment, the entire circumference of the end portion of the side wall 507 of the spout 501 is in contact with the top surface of the cap 502 when the cap 502 is completely screwed, but the contact portion between the inner ring 511 and the side wall 507 of the spout 501 is Unless it welds, the perimeter does not need to contact. Further, although the thick portion 512 is provided in the cap 502, the contact may be realized only by adjusting the height of the end portion of the side wall 507 of the spout 501 without providing the thick portion 512.

  In the first and second embodiments, the spouts 101 and 501 employ a structure that is screwed into the caps 102 and 502, respectively, but are not particularly limited as long as the spout plug can be opened and closed. For example, a structure in which the outer surface of the spout is covered with the inner surface of the cap, or a structure in which the cap and the spout are fitted may be employed. The packaging container uses paper or other soft packaging material, but is not particularly limited as long as it can enclose the contents of liquid, powder or granules, and is poured into a resin pouch or gusset bag. A stopper may be attached.

  The present invention prevents the deterioration of the quality of the spout stopper attached to the packaging container containing liquid, powder or granules as the contents, and ease of opening by opening the cap or pulling ring. Useful for improvement and prevention of leakage of contents.

100, 500, 600 Outlet plug 101, 501, 601 Spout 102, 502, 602 Cap 103, 403, 503, 603 Pull ring 104, 504, 604 Flange 105, 505, 605 Notch 106, 506, 606 Bulkhead 107, 507, 607 Side wall 511 Inner ring 512 Thick part (contact ring)
608 Base part 1000 Packaging container

Claims (2)

A spout stopper composed of a cap and a spout welded to the packaging container,
The spout is
A cylindrical side wall for screwing the cap;
A partition wall for closing the inside of the spout;
An opening pull ring connected to the peripheral edge of the partition wall, at least a portion protruding from the side wall;
A flange connected to the side wall and welded to the inner surface of the edge of the mounting hole of the packaging container;
In the pull ring, the entire circumference of the end far from the flange is on the same plane perpendicular to the screwing rotation axis of the cap, and when the screwing is completed, the cap ring contacts the top surface of the cap .
The cap is formed by making the inner ring that contacts and fits the inner wall of the side wall when screwing is completed, and the thickness of the outer region adjacent to the inner ring larger than the thickness of the top surface of the cap. With
The spout stopper , wherein the entire circumference of the end of the side wall contacts the inner surface of the thick portion inside the cap when the cap is completely screwed . A packaging container,
A container body;
Wherein is welded to the container body, and a spout plug according to claim 1, the packaging container.

Images