JP2011255944A - Lid for beverage container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid for a beverage container having a straw insertion port forming means of a new cutting line format having a constitution which prevents a content in a container from spilling out to the outside of the container.SOLUTION: The lid for the beverage container has a groove-shaped rib that is fit to an edge of an opening of the beverage container, and an upper wall connected to an inner periphery side of the rib, and a laser-beam machined cutting line for inserting a straw into the container from the outside of the container and locking it is disposed at least at one spot on the upper wall. The laser-beam machined cutting line forms a non-penetrating fusion part having a thickness smaller than that of the upper wall all over the cutting line.

Description

  The present invention relates to a lid for a container. More particularly, the present invention relates to a plastic lid that is applied to the upper edge of the beverage container and has a notch on the upper wall surface for allowing a straw to be inserted into the container and inserted.

  When a cold drink such as soft drink is purchased at a fast food store, the store clerk fills the paper container or plastic container with wax coating or thermoplastic film on the inner wall and fills it with soft drink. Cover the edge with a plastic removable lid before handing it to the buyer. The lid is used to prevent the soft drink in the container from spilling or foreign matter in the air from entering the soft drink.

  When a buyer drinks a soft drink in a container, the entire lid can be peeled off from the edge of the container mouth, but recently, a straw has been inserted on the top wall of the lid to allow insertion into the container. It is devised so that the soft drink in the container can be drunk without peeling off the lid.

  For example, a frustoconical recess is provided at the center of the upper wall surface of the lid, and a slit insertion opening is formed by making a perforation along the entire outer periphery of the circular flat bottom of the recess. In this case, in order to drink the soft drink in the container, a straw is projected toward the circular flat bottom of the recessed part, and the straw is inserted into the container through the perforated part. However, in such a lid, the perforated part piece pierced by the straw may be completely cut off from the lid body and dropped into the container and mixed into the soft drink inside.

  In order to solve such drawbacks, in the lid described in Patent Document 1, a straight or curved double-sided cut line and a crossing connecting between the both-side cut lines at an appropriate location on the upper wall surface of the lid. The straw insertion slot comprised by the substantially H-shaped cut line which consists of a cut line is arrange | positioned. The straw insertion port of such a shape is very easy to penetrate a straw or the like into the container, has a high straw gripping effect, and, like a straw insertion port constituted by a circumferential perforated cut line, At the time of penetration, the lid section falls into the container and does not mix with the soft drink inside.

  However, in the case of a straw insertion port configured by a substantially H-shaped cut line disposed on the lid described in Patent Document 1, the container is shaken even when the straw is not inserted. When the soft drink undulates and hits the inner surface of the upper lid wall, the substantially H-shaped cut line portion expands and the soft drink sometimes jumps out of the container.

  Moreover, when ingesting hot drinks, such as hot coffee, tea, and hot chocolate, a straw cannot be used because there is a risk of burning the throat. For this reason, the purchaser himself / herself can open a mouthpiece part for ingesting the contents on a part of the upper wall surface of the lid of the container for hot beverages when in use. Also in this case, perforation processing or cut line processing is performed along the outer periphery of the knob part for opening the mouthpiece, and the same contents as in the case of the perforation processing for straw or the cut line processing. A pop-out problem has been pointed out.

Japanese Utility Model Publication No. 55-21921

  Accordingly, an object of the present invention is to provide a lid for a beverage container having a novel cut line type straw insertion opening or mouthpiece forming means having a configuration in which the contents of the container do not jump out of the container.

  The subject has a groove-like rib fitted to the lip of the beverage container, and an upper wall connected to the inner peripheral side of the rib, and a straw is provided at least at one location on the upper wall. A laser processing cut line portion for inserting and locking into the container from the outside of the container is disposed, and the laser processing cut line portion is thinner than the thickness of the upper wall over the entire cut line portion. This is solved by a lid for a beverage container, wherein a non-penetrating fusion part having a thickness is formed.

  According to the above solution, there is no penetrating portion communicating with the inside and outside of the container in the non-penetrating fused portion itself constituting the laser processing cut line portion until the straw is inserted, so that the product (that is, the liquid beverage is filled). Even if the container is shaken vigorously or overturned, the liquid of the contents will not leak from the score line. The wall thickness of the non-penetrating fusion part that constitutes the laser processing cut line part is thinner than the original thickness of the wall surface on the lid, so if the straw is inserted into the cut line part, the cut line part can be easily It can be opened.

  The laser processing cut line portion has a substantially cross shape, a substantially C shape, a substantially H shape, a substantially L shape, a substantially N shape, a substantially S shape, a substantially T shape, a substantially U shape, and a substantially V shape. It is formed in any shape selected from the group consisting of a shape, a substantially W shape, a substantially Y shape, and a substantially U shape.

  The said laser processing cut line part can be selected from the thing of various shapes, and the utilization property of the lid | cover of this invention is improved.

  The laser processing cut line portion is disposed on a flat upper surface portion of a raised portion having a truncated cone shape disposed in the vicinity of a substantially central portion of the upper wall portion.

  The non-penetrating fusion part constituting the laser-machined cut line part must not be cleaved for anything until a straw is inserted. By arranging the laser processing cut line portion on the flat upper surface portion of the raised portion, even if the beverage in the container shakes and collides with the inner surface side of the upper wall portion of the lid, the flat upper surface portion of the raised portion Compared with the case where it is not disposed, it is possible to reduce the risk that the thin non-penetrating fusion part of the laser-processed cut line part is cleaved by the impact of the collided beverage.

  In addition, the problem includes a groove-like rib fitted to the mouth edge of the beverage container, and an upper wall portion connected to the inner peripheral side of the rib, and at least one place on the upper wall, A convex knob portion for forming the mouthpiece portion is formed, and a laser processing cut line portion is disposed along the outer periphery of the knob portion, and the laser processing cut line portion is a cut line portion. This is solved by a lid for a beverage container characterized in that a non-penetrating fusion part having a thickness thinner than the thickness of the upper wall is formed as a whole.

  According to the above solution, the non-penetrating fusion part itself that constitutes the laser processing cut line part formed along the outer periphery of the knob part for forming the mouth part until the mouth part is established is provided inside and outside the container. Since there is no penetration point that communicates with the product, even if the product (that is, a container filled with a liquid beverage) is shaken vigorously or overturned, the liquid in the contents leaks out from the laser processing cut line. There is no. The wall thickness of the non-penetrating fusion part that constitutes the laser processing cut line part is thinner than the original thickness of the wall surface on the lid, so if you grasp the knob with a finger and pull it, it will follow the laser processing cut line part. Can easily open the mouthpiece.

  Like the conventional lid, the beverage container lid of the present invention has a score line portion formed along the outer periphery of the score line portion for inserting the straw into the upper wall surface of the lid or the knob portion for forming the mouthpiece portion. However, unlike the conventional lid, since the cut line part is formed by laser processing, the plastic of the lid that has been cut once by laser processing is re-fused with the remaining heat, so the cut part is It becomes a non-penetrating film shape with a thickness smaller than the thickness, and is in a state similar to a half cut. Not only does the laser cutting part become a thin non-penetrating membrane, but the contents of the container do not leak out or jump out of the container, and if a straw is pierced, a straw port can be easily opened. You can easily open the mouthpiece by grasping and pulling the knob with your finger.

It is a top view of an example of the lid | cover for drink containers of this invention. It is sectional drawing along the II-II line in FIG. It is a fragmentary top view which shows another embodiment (A)-(L) of the laser cutting line part 11. FIG. It is a top view of another example of the lid | cover for drink containers of this invention. It is a perspective view which shows the state which opened the drinking mouth of the lid | cover for drink containers shown by FIG.

  Hereinafter, preferred embodiments of the lid for a beverage container of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of an example of a beverage container lid of the present invention, and FIG. 2 is a cross-sectional view taken along line II-II in FIG.

  Please refer to FIG. The lid 1 for a beverage container of the present invention basically has a groove-like rib 3 fitted to the lip of the beverage container, and an upper wall portion 5 connected to the inner peripheral side of the rib. A frustoconical raised portion 7 is formed in the vicinity of a substantially central portion of the upper wall portion 5, and a laser processing cut line portion 11 is formed on a flat upper surface portion 9 of the raised portion 7. However, in the beverage container lid 1 of the present invention, the formation of the raised portion 7 is not an essential requirement. Therefore, the laser processing cut line portion 11 can be disposed at an arbitrary position of the upper wall portion 5.

  Please refer to FIG. The rib 3 of the lid 1 for a beverage container of the present invention is fitted to the mouth edge 22 of the beverage container 20. When the lid 1 is made of plastic, it has elasticity, so that the rib 3 can be fitted tightly to the mouth edge 22 of the beverage container 20 and high sealing performance can be exhibited. It is preferable to dispose a frustoconical raised portion 7 in the substantially central portion of the upper wall portion 5 of the lid 1. Therefore, it is preferable to arrange the laser processing cut line portion 11 on the flat upper surface 9 of the raised portion 7. Even if the beverage 24 in the container 20 shakes and collides with the inner surface side of the upper wall portion 5 of the lid 1 due to the presence of the raised portion 7, the beverage 24 is laser processed compared to the case where the raised portion 7 does not exist. The amount of spilling out of the container from the cut line portion 11 can be further reduced.

  As shown in FIG. 2, the laser processing cut line portion 11 includes a groove 13 and a non-penetrating fusion portion 15 at the bottom of the groove 13. When the plastic lid 1 is laser processed to form a cross-shaped straw insertion portion as shown in FIG. 1, the irradiated laser light is the upper wall surface 5 of the lid 1 or the flat upper surface portion 9 of the raised portion 7. The wall 13 is penetrated, the wall is cut into a cross shape, and the groove 13 is formed. However, when the laser beam irradiation is stopped, the lower portion of the groove 13 in the cut portion is re-fused by the heat remaining in the laser beam, and a film having a thickness smaller than the wall thickness before cutting (that is, the non-penetrating fusion portion 15). ) Is formed, and is in a state similar to a half cut by mechanical processing using a Thomson blade or the like.

  The laser processing machine used in order to form the laser processing cut line part 11 in the lid | cover 1 of this invention is not specifically limited. Solid-state laser (for example, ruby laser, YAG laser, Nd: YAG laser, diode-pumped solid-state laser), liquid laser (for example, dye laser), gas laser (for example, carbon dioxide laser, helium-neon laser, argon ion laser, excimer) Laser), a semiconductor laser, a free electron laser, a metal vapor laser, a chemical laser, and the like. A carbon dioxide laser is preferable from the viewpoint of easy handling. As the carbon dioxide laser, for example, an LP400 series carbon dioxide laser commercially available from SUNX Corporation can be used. This carbon dioxide laser can generate laser light having an average output of 10 W to 30 W and a wavelength of 9.3 μm to 10.6 μm.

  The line width of the laser processing cut line portion 11 (that is, the width of the groove 13) varies depending on the beam diameter of the laser beam to be used, but is generally preferably in the range of 30 μm to 300 μm. To widen the line width, there are (a) a method of drawing a thick line by offsetting the line, or (b) a method of intentionally blurring the spot by shifting the focus of the laser, but if the focus is shifted, the energy density in the spot is lowered. Therefore, processing quality is affected. When the width of the groove 13 is less than 30 μm, it is not preferable because it is difficult to break through the formed laser processed cut line portion 11 with a straw. On the other hand, if the width of the groove 13 is more than 300 μm, the number of times of laser beam irradiation must be increased during processing, and not only the working efficiency is lowered, but the groove width is too wide to form the re-fused portion 15 at the bottom of the groove. It may not be possible.

  The lid 1 for beverage containers of the present invention can be formed from plastics such as thermoplastics or thermosetting plastics. Thermoplastics are preferred. As the plastic material for forming the lid 1, polyethylene (PE), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET), polylactic acid (PLA) and the like are suitable. Needless to say, other materials can also be used to make the beverage container lid 1 of the present invention. The lid 1 can be easily mass-produced by injection molding these plastic materials. The thickness of the lid 1 is not an essential requirement of the present invention, but is generally in the range of about 0.2 mm to 0.3 mm. As the thickness of the lid 1 increases, it is necessary to increase the laser output, decrease the irradiation speed, and increase the number of irradiations. In the case of thermoplastics, the laser beam irradiation time per time is about 0.1 seconds to 0.2 seconds.

  FIG. 3 is a partial plan view showing another embodiment of the laser processing cut line portion 11. In addition to the cross shape shown in FIG. 1, the laser processing cut line portion 11 has a substantially C shape or a substantially H shape as shown in FIG. 3 in consideration of factors such as use and aesthetics. Various shapes such as an approximately L shape, an approximately N shape, an approximately S shape, an approximately T shape, an approximately U shape, an approximately V shape, an approximate W shape, an approximate Y shape, and an approximate U shape. Can take.

  FIG. 4 is a plan view of another embodiment of the beverage container lid of the present invention. The beverage container lid 1 shown in FIG. 1 is generally for a cold beverage in which a straw is used, but the beverage container lid 1A in FIG. It is used for the purpose of ingesting cold drinks or hot drinks). Accordingly, the beverage container lid 1A can be used both as a cold beverage and a hot beverage. Please refer to FIG. Similarly to the beverage container lid 1, the beverage container lid 1 </ b> A also has a groove-like rib 3 fitted to the mouth edge of the beverage container, and an upper wall portion 5 connected to the inner peripheral side of the rib. . A groove 13 of a substantially U-shaped laser processing cut line portion 11 is formed in a portion near the outer peripheral edge of the upper wall portion 5. A convex knob 26 is disposed on the upper surface of the upper wall 5 above the U-shape. An accommodation recess 28 for fitting and locking the knob 26 is disposed adjacent to the knob 26. A protruding portion 30 for fitting the knob portion 26 is provided opposite to the substantially central portion of the housing recess 28. The groove 13 of the laser processing cut line portion 11 in the beverage container lid 1 </ b> A is the same as the groove 13 of the laser processing cut line portion 11 in the beverage container lid 1. However, the arrangement of the accommodation recess 28 is not an essential requirement. That is, the entire periphery of the knob portion 26 can be cut off so that the drinking mouth is always open, or the drinking mouth can be opened or closed by leaving a part of the outer periphery of the knob portion 26 as a fold line. You can also

  FIG. 5 is a perspective view showing a state where the knob 26 is fitted and locked in the housing recess 28 to form the drinking mouth 32 (or the straw insertion opening) in the beverage container lid 1A shown in FIG. It is. When the knob 26 is gripped with a finger and pulled strongly up and down, the non-penetrating fusion part 15 (not shown) at the bottom of the groove 13 of the laser-machined cut line part 11 is broken and the knob 26 is formed. Only the upper wall surface portion outlined in a substantially U shape is opened, and the drinking mouth 32 is opened. Since the convex knob 26 is housed in the housing recess 28 and is fitted and locked to the protruding portion 30, the drinking mouth 32 can be kept open. Even in this beverage container lid 1 </ b> A, the contents of the container do not leak out or jump out of the container due to the presence of the non-penetrating fusion part 15 at the bottom of the groove 13 of the laser processing cut line part 11.

Prepare a lid made of polystyrene with an upper wall thickness of 0.22 to 0.23 mm, and use a LP430U carbon dioxide laser commercially available from SUNX Co., Ltd. The line part 11 was formed.
The average output of the carbon dioxide laser was 30 W, and the wavelength was 10.6 μm. The beam diameter of the carbon dioxide laser was adjusted so that the line width of the groove 13 of the laser processing cut line portion 11 was 110 μm. This laser beam was applied to the upper wall surface of the polystyrene lid for 0.16 seconds to form a cruciform laser processing cut line portion 11.
When this lid was applied to the mouth edge of the paper container filled with water and turned upside down, no water leaked from the laser processing cut line 11.
When the container was returned to its original state and a straw was pierced from above the laser processing cut line portion 11, the straw could be inserted into the container relatively easily.

  As mentioned above, although the preferable embodiment of the lid | cover for drink containers of this invention has been demonstrated, the lid | cover for drink containers of this invention is not limited only to the illustrated embodiment. In particular, with respect to the shape of the lid, the upper wall portion 5 can be raised higher than the rib 3. In other words, the shape of the lid itself can be formed into an arbitrary shape in consideration of various factors such as the use and strength of the lid. Moreover, although the lid | cover for drink containers of this invention is illustrated as a detachable lid | cover, it can also be a non-detachable lid | cover of a fitting type, a winding type, or a container edge part adhesion type.

DESCRIPTION OF SYMBOLS 1,1A Beverage container lid 3 of the present invention Rib 5 Upper wall part 7 Frustum-shaped raised part 9 Flat upper surface part 11 Laser processing cut line part 13 Groove 15 Non-penetrating fusion part 20 Beverage container 22 Mouth part 24 Beverage 26 Convex knob 28 Contained recess 30 Protrusion 32 Drinking mouth

Claims (7)

A groove-like rib fitted to the mouth edge of the beverage container and an upper wall connected to the inner peripheral side of the rib, and a straw is placed from at least one place on the upper wall from the outside of the container. A laser processing cut line portion for inserting and locking in is disposed, and the laser processing cut line portion has a thickness that is thinner than the thickness of the upper wall over the entire cut line portion. A lid for a beverage container, wherein a through-fusion part is formed. The laser processing cut line portion has a substantially cross shape, a substantially C shape, a substantially H shape, a substantially L shape, a substantially N shape, a substantially S shape, a substantially T shape, a substantially U shape, and a substantially V shape. The lid for a beverage container according to claim 1, wherein the lid is formed in any shape selected from the group consisting of a shape, a substantially W shape, a substantially Y shape, and a substantially U shape. The said laser processing cut line part is arrange | positioned at the flat upper surface part of the frustoconical-shaped protruding part arrange | positioned in the approximate center part vicinity of the upper wall part. Beverage container lid. The lid for a beverage container according to any one of claims 1 to 3, wherein the lid is used for a cold beverage. It has a groove-shaped rib fitted to the mouth edge of the beverage container and an upper wall connected to the inner peripheral side of the rib, and at least one place on the upper wall is used for forming the mouthpiece. A convex knob portion is formed, and a laser machining cut line portion is disposed along an outer periphery of the knob portion, and the laser machining cut line portion is formed on the upper wall over the entire cut line portion. A lid for a beverage container, wherein a non-penetrating fusion part having a thickness smaller than the thickness is formed. 6. The lid for a beverage container according to claim 5, further comprising an accommodation recess for fitting and locking the convex knob when the drinking mouth is formed on the upper wall. . The lid for a beverage container according to claim 5 or 6, which can be used for both a cold beverage and a hot beverage.

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