JPH1035735A - Container for liquid food - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the sealability at the time of usage by a method wherein for a container for which on a flange part equipped with a tab part extending to the outside at one part of the opening of the container, a filter member is annularly heat- sealed, an expanded part with a wider width is formed at the tab part, and a half notch is provided from the lower surface on the expanded part in the width direction. SOLUTION: One part of a flange part 4 which is provided on the outer periphery of the upper end of a container main body 1, is made a tab part 5 which extends to the outside, and a lid member 6 to cover the upper surfaces of the opening part, the flange part 4 and the tab part 5, is bonded to the flange part 4 by heat-sealing 7. In this case, for the tab part 5, between the connecting part 5a and the leading end part 5b, an expanded part 5c of which the width is wider than that of the connecting part 5a, is formed, and on the expanded part 5c, a half notch 8 is provided from the lower surface in the width direction. Then, to the tab part 5, the lid member 6 is bonded by heat-sealing 9 at a spot closer to the leading end part 5b side than the expanded part 5c, and both side edge parts 5a1, 5a2 of the connecting part 5a, the leading end edge part 5b1 of the leading end part 5b, and both side edge parts 5c1, 5c2 of the expanded part 5c, are formed into arc-shapes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the use of milk or syrup in coffee or beverages or honey which is eaten or used as a food additive at a time, whether or not containing granules. The present invention relates to a liquid food container that contains a liquid food having a relatively low viscosity and can be easily opened.

[0002]

2. Description of the Related Art Conventionally, as a container for accommodating a small amount of liquid food, a liquid food container in which a flange is provided on an outer periphery of an upper end of a container forming an opening and a lid material is heat-sealed on the flange is provided. Many are used. This type of liquid food container needs to have improved sealing properties due to hygiene problems, and for that purpose, it is necessary to increase the strength of the heat seal. However, when the strength of the heat seal is increased, the opening property at the time of use deteriorates, and excessive force is applied at the time of opening, causing a problem that the liquid food inside is spilled or scattered. Therefore, conventionally, the following techniques have been proposed.

As a first prior art, a knob is provided on a cover member for sealing an opening of a container body so as to protrude from a flange provided on an outer periphery of the opening of the container body, and further, a root of the knob is provided. There is a portion provided with a cut extending toward the opening (Japanese Utility Model Application Laid-Open No. 62-203858).
In the first prior art, since the lid material is opened with too much force to open the entire surface of the lid material, when opening with the knob, the lid material is cut from the cut, and only a part of the lid material is cut off. It is intended to easily obtain an opening.

As a second prior art, a flange is provided on an outer periphery of an upper end forming an opening in a container body, and a knob is further provided to extend outward from the flange. There is one in which a half notch is provided at the base of the portion and a cut is provided toward the opening (Japanese Utility Model Application Laid-Open No. 61-188960).
In the second prior art, the knob is bent at a half notch provided at the base thereof and cut off from the container body, and too much force is applied to open the entire lid material as in the first prior art. When opening with the part,
The lid material is cut from the cut, and an opening is easily obtained by cutting off only a part of the lid material.

As a third prior art, a flange portion is provided on the outer periphery of an upper end forming an opening in a container body, and a knob portion extending further outward from the flange portion is provided. A half notch is provided at a position distant from the base of the part, and a cut is provided from the half notch toward the opening (Japanese Utility Model Laid-Open No. 63-91463). The third prior art, as in the second prior art, separates the knob from the container body by bending the knob at the half notch,
Because too much force is applied to open the entire lid material, when opening with the knob, cut the lid material from the notch and try to easily obtain the opening by cutting off only a part of the lid material. Is what you do.

[0006]

However, as in the first prior art described above, if a cover is provided with a knob protruding from a flange, the cover may be caught in something during transportation or the like. While an external force is applied or a deformation stress is repeatedly applied to the knob, at this knob,
There is a problem that the lid material is turned up and peeled off from the container. In particular, if a notch is provided at the base of the knob portion as in the first prior art, the possibility of this problem is further increased, and it is difficult to ensure the sealing performance. . Therefore, it is not preferable to provide the knob portion only on the lid member.

Further, in the second prior art, since a knob having a rigidity further extending from the flange portion is provided, there is no problem as in the first prior art. However, in the second conventional technique, the central portion of the lid member, that is, the upper surface portion of the opening is likely to be pressed at the time of opening, because of the configuration of bending at the base of the knob. Therefore, if the package is opened at substantially the same timing as the folding, the internal pressure is increased by the pressing of the upper surface of the opening, and a problem that the food contained in the package is scattered occurs. In particular, the second prior art has a configuration in which the bent portion is very close to the opening at the base portion of the knob portion, and has a cut in the base portion, so that it is opened at the time of bending, and the inner portion is opened. It is very likely that the contained food will splatter.

Further, in the third prior art, since a knob having rigidity further extending from the flange portion is provided, there is no problem as in the first prior art. Due to the configuration in which the knob portion is bent at a position away from the base portion, the possibility of pressing the central portion of the lid material, that is, the upper surface portion of the opening at the time of opening as in the second related art is low, almost the same as bending. There is no problem of opening at the timing. Therefore, according to the third conventional technique, there is no problem that the food contained therein is scattered at the time of opening. However, in the third conventional technique, there is a possibility that the lid material is turned up from the cut portion, and further a member on a thin flat plate such as a knob portion of another food container is sandwiched in the turned up portion. There is a problem that turning over becomes severe and may give the user an uneasy feeling of hygiene even if the opening is not completed. In addition, a sharp corner is formed at the side edge having the cut portion, which is not preferable in terms of safety.

In the present invention, therefore, even if the strength of the heat seal is increased, the openability at the time of use is good, and excessive force is applied at the time of opening, so that the liquid food inside may be spilled or scattered. A primary object is to provide a liquid food container that does not cause any problems. Further, the present invention further provides a liquid food container which ensures the sealing property until the time of opening use and does not turn up or peel off the lid material before opening use. Aim. Further, in order to achieve the above object, the present invention basically has a knob portion extending further from the flange portion in the container body, and partially separates the knob portion, and then separates the separated knob portion. A liquid food container that is held and opened is adopted, but when bending the separating knob, the possibility of pressing the central portion of the lid material, that is, the upper surface of the opening is reduced, and the container is bent with a small bending force. A third object is to make the configuration possible. Further, a fourth object of the present invention is to provide a liquid food container having high safety not only at the time of use when opened, but also before and after use. In addition, the present invention further minimizes the protrusion of the knob portion to reduce the cut-off portion of the lid member during manufacturing, and reduces the possibility that external force is applied only to the knob portion in a state before use, thereby reducing the lid material. A fifth object is to provide a liquid food container that further secures hermeticity.

[0010]

In order to achieve the above object, a liquid food container according to the present invention is provided with a flange on an outer periphery of an upper end forming an opening and further extending outward from a part of the flange. A container body provided with an extending knob portion, a lid member covering an opening of the container body, an upper surface of the flange portion and the knob portion, and heat-sealing the lid member to the flange portion in an annular shape. In the liquid food container according to the above, the knob portion forms an enlarged portion wider than the connecting portion between the connecting portion with the flange portion and the tip portion, and the width portion is formed on the enlarged portion in the width direction. A half notch is provided from the lower surface and the lid material is heat-sealed to the knob on the tip side with respect to the enlarged portion, and the distal edge of the tip of the knob and both side edges of the enlarged portion are formed in an arc shape. Features To.

Further, the container for liquid food of the present invention according to claim 2 is a container for liquid food according to claim 1,
On both side edges of the connecting portion, a notch is provided to reach the outer peripheral portion of the annular heat sealing portion in the flange portion, or both side edges of the connecting portion are formed in the annular heat sealing portion in the flange portion. It is characterized by reaching to the outer periphery.

According to a third aspect of the present invention, in the liquid food container according to the second aspect, the width of the annular heat seal portion in the flange portion is increased at the connecting portion. It is characterized by the following.

According to a fourth aspect of the present invention, in the liquid food container according to the second aspect of the present invention, the liquid food container extends from the vicinity of both side edges of the connecting portion in a direction not having the knob. Heat seal portions at predetermined intervals are provided so as to be connected to the inner peripheral side of the annular heat seal portion in the flange portion.

According to a fifth aspect of the present invention, there is provided a liquid food container according to the first to fourth aspects, wherein the annular heat seal portion of the flange portion extends beyond the connecting portion. It is characterized in that a protrusion protruding toward the knob is provided.

According to a sixth aspect of the present invention, in the liquid food container according to the fifth aspect, the projecting portion is connected to the heat seal portion of the knob. .

According to a seventh aspect of the present invention, there is provided the liquid food container according to any one of the first to sixth aspects, wherein the opening is formed in a substantially rectangular shape, and a flange is formed except for the four corners. In the container body in which the side edge of the portion is formed in a straight line, the knob portion is provided at one corner, and the side edge portion extending from the enlarged portion of the knob portion to the front end portion is formed in a straight line of the flange portion. , And the half notch is provided substantially parallel to the diagonal line of the opening.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, a container is provided with a flange on the outer periphery of the upper end of the container, and a knob extending further outward from a part of the flange. The present invention relates to a liquid food container in which a lid member is heat-sealed annularly on the flange portion, and the lid member covers the opening of the container body and the upper surfaces of the flange portion and the knob portion. In this way, by providing a knob extending from the flange of the container body and basically adopting a configuration that does not use only a part of the lid material as the knob, the sealing performance is ensured until opening use. Secured, the lid does not turn up or peel off before opening.

According to the present invention, in the liquid food container as described above, the knob portion has an enlarged portion wider than the connecting portion with the flange portion up to the tip portion, and the enlarged portion has A half notch formed from the lower surface is provided. Therefore, by pressing the vicinity of the enlarged portion of the knob with the finger from the upper surface, and pressing the knob with the finger from the lower surface,
The knob can be bent and separated at the half notch. Usually, the position to be pressed from the top is
Select a place with a certain area that is easy to hold with your finger. According to the embodiment of the present invention, by providing a half notch in the enlarged portion which will be pressed from the upper surface, the force applied from the lower surface of the tip portion is concentrated on the half notch portion without dispersing over the entire knob portion. Can be opened with minimal force. In addition, if the pressing force applied from the lower surface of the distal end portion is dispersed over the entire knob portion, the impact force at the time of cutting increases, but according to the embodiment of the present invention, the impact force at the time of such cutting is also small. Therefore, there is no fear that the food contained therein will be scattered at the time of opening.

Further, when the lid is opened up to the connecting portion after the knob is cut, the connecting force side is narrower than the cut portion, so that the opening force gradually decreases, and the peeling force and the torsional force are reduced. Even if it is added, there is no possibility that the lid material is torn off without being along the side edge of the knob portion. Therefore, according to the embodiment of the present invention, it is possible to smoothly open the lid material up to the connecting portion after the knob portion is cut as planned, and when the connecting portion is reached, the lid material is opened according to the width of the connecting portion. It can be peeled off. Then, when opening the lid material after the connecting portion, the heat sealing portion is reached while gradually decreasing to a width equal to or less than the width of the connecting portion, and thereafter the lid material is similarly opened while being cut, and the container is opened. On the upper surface of the opening, a substantially triangular opening can be formed.

Further, according to the present invention, the lid is heat-sealed to the knob at the tip end side of the enlarged portion, and the tip edge of the tip portion of the knob portion and both side edges of the enlarged portion are arc-shaped. Before opening, the lid does not turn up from the tip of the knob and the enlarged portion, and the user does not feel uneasy about food hygiene. Also, at this time, since the tip edge of the tip portion of the knob portion and both side edges of the enlarged portion are formed in an arc shape, not only at the time of unsealing use, but also at the tip portion of the knob portion and the enlarged portion before and after use, it may be caught. There is no worry to hurt and the safety is high.

Further, according to the present invention, a notch extending to the outer peripheral portion of the annular heat seal portion in the flange portion is provided on both side edges of the connecting portion, or both side edges of the connecting portion are formed in the annular portion in the flange portion. In this embodiment, the opening force at the time of entering the heat seal portion can be reduced, and a smooth and stable opening can be performed.

Further, according to the present invention, the width of the annular heat seal portion in the flange portion is made wider in the connecting portion, so that even if a manufacturing variation occurs, the notch portion or the connecting portion can be formed. Can reach the inner peripheral portion of the heat-sealing portion, thereby eliminating the problem that the contained foods leak out.

Further, according to the present invention, a heat seal portion extending at a predetermined interval extending from the vicinity of both side edges of the connecting portion in a direction not having the knob portion is connected to the inner peripheral side of the annular heat seal portion in the flange portion. By providing the embodiment as described above, it is possible to prevent the stored food from flowing out to the outside due to manufacturing variations or the like as described above. Further, since the increase in the area of the heat seal portion on the surface from which the lid material is peeled can be minimized, the opening can be easily performed. Furthermore, by increasing the area of the heat seal portion on the surface where the lid material is cut and the lid material is not peeled off,
Separation and cutting of the lid material can be performed more easily.

Further, the present invention provides an embodiment in which the annular heat seal portion in the flange portion is provided with a protruding portion which protrudes beyond the connecting portion toward the knob portion.
Since the heat seal portion is gradually opened from the narrow protrusion, the opening force at the time of entering the heat seal portion can be reduced, and smoother and more stable opening can be performed.

Further, according to the present invention, the projecting portion is connected to the heat sealing portion in the knob portion, so that a part of the annular heat sealing portion in the flange portion crosses the half notch portion. Become. Therefore, by bending and separating the tip of the knob at the half notch portion, a part of the heat sealing portion is opened, and the opening force at the time of entering the heat sealing portion can be reduced.

Further, according to the present invention, in a container body provided with a flange portion having an opening portion having a substantially rectangular shape and a side edge portion formed linearly except for four corners, a knob portion is provided at one corner,
The side edge from the enlarged portion of the knob portion to the tip portion is configured to be on an extension of the straight side edge of the flange portion, and the half notch is provided substantially parallel to the diagonal line of the opening. By adopting the form, the knob portion can be provided without protruding, and in the state before opening use, the possibility of external force being applied only to the knob portion can be reduced, and the sealing property of the lid material before use, etc. Can be further secured. In addition, since the lid material fits within the predetermined rectangular shape, the amount of the lid material that is cut off during manufacturing can be reduced.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the liquid food container according to the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a liquid food container according to the present embodiment, and FIG. 2 is a side view of the liquid food container. The container body 1 forms a food container 3 having an upper end 2 as an opening. A flange 4 having a predetermined width is formed on the outer periphery of the upper end 2 of the container body 1, and a part of the flange 4 further forms a knob 5 extending outward. The food container 3, the flange 4, and the knob 5 are integrally formed by press working or the like. However, the flange portion 4 and the knob portion 5 are configured to be thicker than the food storage portion 3 so as to have rigidity. At this time, the container body 1 is made of a thermoplastic resin such as a polystyrene resin that can be heat-sealed, but may be formed of a multilayer sheet. When a multilayer sheet is used, various single resins such as polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polycarbonate, vinyl acetate copolymer, polyamide, and vinyl chloride copolymer, Those in which several kinds of these resins are blended arbitrarily or those in which each resin is treated with an unsaturated carboxylic acid or the like can be used.

On the other hand, the opening at the upper end 2 of the container body 1 is sealed by a lid member 6. The lid member 6 covers not only the opening, but also covers all the upper surfaces of the flange 4 and the knob 5, and is adhered to the flange 4 by a heat seal 7. At this time, any resin film can be used as the lid member 6 as long as it can be heat-sealed with the flange portion 4, but strong adhesion can be realized by having the sealant layer. When the lid member 6 has a multilayer structure, for example, a composite material in which a polyethylene terephthalate film and an aluminum foil are laminated and bonded via a sealant layer is used. However, the materials of these members can be appropriately selected according to the type of food and the use of the container. In addition, the upper surface of the lid member 6 is appropriately printed.

The knob 5 has a connecting portion 5 with the flange 4.
The enlarged portion 5c having a width larger than the width of the connecting portion 5a is formed from the point a to the tip 5b. This enlarged part 5
It is preferable that c is provided closer to the tip 5b than to an intermediate position between the connecting portion 5a and the tip 5b. Further, it is preferable that the portion from the connecting portion 5a to the enlarged portion 5c has a gradually enlarged shape as shown in the figure. However, from the connecting portion 5a to the enlarged portion 5
The gradually enlarged shape up to c is not limited to a linear shape as shown, but may be an arc shape. In the case of an arc shape, it is preferable to provide the knob portion 5 so as to be convex inside. At the position of the enlarged portion 5c of the knob 5, a half notch 8 is provided from the lower surface in the width direction.
On the tip 5b side of the enlarged portion 5c of the knob 5, the lid 6 is bonded to the knob 5 by a heat seal 9. In addition, both side edge portions 5 of the connecting portion 5a of the knob portion 5
a1, 5a2, the tip edge 5b1 of the tip 5b, and both side edges 5c1, 5c2 of the enlarged portion 5c are arc-shaped.

The heat seal portion 7 is provided annularly at the position of the flange portion 4 with a predetermined width. In the flange portion 4 provided with the knob portion 5, the knob portion 5 extends beyond the connecting portion 5a.
It has a protruding portion 7a protruding to the side. The heat seal portion 9 may be provided almost entirely between the enlarged portion 5c and the tip portion 5b in addition to the case where the heat seal portion 9 is provided in a circular spot shape as shown in the figure. When the knob portion 5 is large, it is preferable that the knob portion 5 is provided in a substantially U-shape along the side edges 5c1 and 5c2 of the enlarged portion 5c and along the front edge 5b1 of the front portion 5b. In this embodiment, the heat seal portion 7 and the heat seal portion 9 are separately provided. However, the protrusion 7a of the heat seal portion 7 may be extended to the position of the heat seal portion 9. .

Next, the opening operation of the lid 6 of the liquid food container according to the above embodiment will be described with reference to the drawings. FIG.
FIG. 4 is an enlarged side view of a knob portion showing a use state. Normally, the user selects a position to be pressed from the top surface with a certain area that is easy to stably press with a finger. Therefore, as shown in FIG. 3, the finger A presses the vicinity of the enlarged portion 5c of the knob 5 from above with the finger A, and presses the tip 5b of the knob 5 with the finger B from the lower surface. 5b can be bent at the half notch 8 and separated. In the present embodiment, the half notch 8 is provided on the enlarged portion 5c which will be pressed from the upper surface, so that the force applied from the lower surface of the tip portion 5b can be concentrated on the half notch 8 and the minimum force Can be opened. A comparative example at this time will be described with reference to FIGS. Assuming that the knob portion has a configuration in which the width gradually decreases from the connecting portion to the distal end portion as shown in FIG. 4, the user can use the finger A to move the enlarged position that is easy to press stably with the finger A as shown in FIG. There are many cases to hold down. In such a case, as shown in FIG. 5, when the tip 5b of the knob 5 is pressed by the finger B from the lower surface, the pressing force applied from the lower surface of the tip 5a is reduced as shown by the dotted line.
It is dispersed throughout. Therefore, in order to bend the tip portion 5b at the half notch 8 and separate it, not only a strong pressing force is required, but also the impact force at the time of cutting increases. That is, not only is it difficult to easily open the package with a small force, but also anxiety that the food contained in the package is scattered when the package is opened is given. In the present embodiment, as shown by a dotted line in FIG.
In order not to disperse the pressing force of the
Cutting is possible with a small force, and the impact force during cutting is small.

Further, when the lid member 6 is opened up to the connecting portion 5a after the knob portion is cut, the opening force is gradually reduced because the connecting portion 5a side is narrower than the enlarged portion 5c to be the cut portion. When the torsion force is applied to the peeling force, the lid member 6 does not tear off without being along the side edge of the knob 5. That is, FIG.
If the connecting portion side is gradually expanded from the cut portion as shown in FIG. 4, when a force is applied in a direction like C, the lid material is cut in the direction of the dotted line D and peels off. There are cases. Therefore, according to the present embodiment, the lid 6 can be opened smoothly up to the connecting portion 5a after the knob is cut, as planned, and when the connecting portion 5a is reached, the width of the connecting portion 5a is reduced. You can peel it off the street.

When the lid 6 after the connecting portion 5a is opened, the lid 6 gradually decreases to a width equal to or less than the width of the connecting portion 5a, reaches the heat seal portion 7, and thereafter, similarly. The container is opened while being cut, and a substantially triangular opening can be formed on the upper surface of the container opening as shown in FIG. FIG. 6 is a plan view of the liquid food container according to the present embodiment after opening.

Next, a liquid food container according to another embodiment of the present invention will be described with reference to the drawings. Note that the same members performing the same function are denoted by the same reference numerals, and description thereof is omitted. First, a second embodiment is shown in FIG. In this embodiment, the connecting portion 5
a notches 10a, 1a at both side edges 5a1, 5a2
0b is provided. These notches 10a, 10
b is provided so as to reach the outer peripheral portion of the annular heat seal portion 7. In this embodiment, such a notch 10
By providing a and 10b, the opening force at the time of entering the heat seal portion 7 can be reduced, and smooth and stable opening can be performed.

Next, a third embodiment is shown in FIG. In this embodiment, both side edges 11a and 11b of the connecting portion are provided so as to reach the outer peripheral portion of the annular heat seal portion 7. In the present embodiment, by opening both side edges 11a and 11b of the connecting portion to the outer peripheral portion of the annular heat seal portion 7, the opening force at the time of entering the heat seal portion 7 can be reduced,
Smooth and stable opening can be performed.

Next, a fourth embodiment is shown in FIG. In this embodiment, the protrusion 7a of the annular heat seal 7 is connected to the heat seal 9 of the knob 5, and the width of the annular heat seal 7 is increased at the connecting portion 5a. Then, both side edges 11 of the connecting portion
a and 11b are provided so as to reach the outer peripheral portion of the heat seal portion 7 whose width is enlarged. In the present embodiment, similarly to the third embodiment, the opening force at the time of entering the heat seal portion 7 can be reduced, and a smooth and stable opening can be performed. However, it is possible to eliminate the problem that the stored foods flow out to the outside by the side edges 11a and 11b of the connecting portion reaching the inner peripheral portion of the annular heat seal portion 7.

Next, a fifth embodiment is shown in FIG. In the present embodiment, the heat seal portions 7b extending at predetermined intervals from the vicinity of both side edges 11a and 11b of the connection portion 5a in a direction not having the knob 5 are connected to the inner peripheral side of the annular heat seal portion 7. Provided. In this embodiment, the protruding portion 7 a of the annular heat seal portion 7 is connected to the heat seal portion 9 of the knob 5. Further, both side edges 11a and 11b of the connecting portion are provided so as to reach the outer peripheral portion of the heat seal portion 7 which is provided with the heat seal portion 7b and whose width is substantially enlarged. Also in this embodiment, similarly to the third and fourth embodiments, the opening force at the time of entering the heat seal portion 7 can be reduced, and a smooth and stable opening can be performed. This embodiment is similar to the fourth embodiment,
Even if manufacturing variations occur, both side edges 11 of the connecting portion
Although it is possible to eliminate the problem that the stored food leaks to the outside because the a and 11b reach the inner peripheral portion of the annular heat seal portion 7, the area of the heat seal portion 7 on the surface from which the lid 6 is peeled off is further reduced. Can be easily opened because the increase in the number of sheets can be minimized. In addition, by increasing the area of the heat sealing portion 7b on the surface where the lid 6 is cut and where the lid 6 is not peeled off, the lid can be more easily peeled and cut.

Next, FIG. 11 shows a sixth embodiment. In the present embodiment, the opening formed by the upper end 12 of the container body is substantially rectangular. The flange portion 4 provided on the outer periphery of the upper end 12 has side edges 4a and 4
b, 4c and 4d are formed linearly. The flange portion 4 has a heat seal portion 7 as in the above-described embodiment. In addition, this heat seal part 7 includes
It is preferable to provide the protrusion 7a. A knob 5 is provided at one corner of the container body. The knob 5 includes a connecting portion 5a and a tip 5 as in the first embodiment.
b and an enlarged portion 5c, and a half notch 8
And a heat seal portion 9. It is also possible to provide notches as in the second embodiment, or to provide both side edges of the connecting portion to the annular heat seal portion as in the third embodiment. . The feature of the present embodiment is that a side edge from the enlarged portion 5c of the knob 5 to the tip 5b is formed in a straight line with the flange 4 at the side edge 4.
The configuration is such that the half notch 8 is provided substantially in parallel with the diagonal line of the opening. In the present embodiment, by adopting the above-described configuration, it is possible to provide the knob 5 without projecting, and it is possible to reduce a possibility that an external force is applied only to the knob 5 in a state before opening. It is possible to further secure the sealing property of the lid material before use. In addition, since the lid member 6 fits within a predetermined rectangular shape, the amount of the lid member that is cut off during manufacturing can be reduced.

[0039]

As is apparent from the above description, according to the present invention, even if the strength of the heat seal is increased, the openability at the time of use is good, and too much force is applied at the time of opening, so that the liquid food inside can be removed. It is possible to provide a liquid food container that does not cause a problem of spilling or scattering. Further, the present invention can provide a liquid food container that ensures the sealing property until the time of opening use and does not turn up or peel off the lid material before opening use. Further, according to the present invention, when the knob is bent, the possibility of pressing the central portion of the lid material, that is, the upper surface of the opening is reduced, and the bending can be performed with a small bending force. Further, the present invention can provide a highly safe liquid food container not only at the time of use when opened, but also before and after use. In addition, the present invention further minimizes the protrusion of the knob,
It is possible to reduce the number of cut-off portions of the lid material at the time of manufacturing, and to reduce the possibility of applying an external force only to the knob portion in a state before use to further secure the sealing property of the lid material.

[Brief description of the drawings]

FIG. 1 is a plan view of a liquid food container according to a first embodiment of the present invention.

FIG. 2 is a side view of the liquid food container according to the first embodiment of the present invention;

FIG. 3 is a side view of a main part showing the opened state of the liquid food container according to the first embodiment of the present invention;

FIG. 4 is a main part plan view showing an opened and used state of the liquid food container according to the comparative example.

FIG. 5 is a side view of a main part showing an opened and used state of the liquid food container according to the comparative example.

FIG. 6 is a plan view showing the container for liquid food after opening according to the first embodiment of the present invention.

FIG. 7 is a plan view of a liquid food container according to a second embodiment of the present invention.

FIG. 8 is a plan view of a liquid food container according to a third embodiment of the present invention.

FIG. 9 is a plan view of a liquid food container according to a fourth embodiment of the present invention.

FIG. 10 is a plan view of a liquid food container according to a fifth embodiment of the present invention.

FIG. 11 is a plan view of a liquid food container according to a sixth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container main body 2 Upper end 4 Flange part 5 Knob part 5a Connecting part 5b Tip part 5b1 Tip edge part 5c Enlarged part 5c1 Side edge part of enlarged part 5c2 Side edge part of enlarged part 6 Cover material 7 Heat seal part 7a Projection part 7b Heat Seal portion 8 Half notch 9 Heat seal portion 10a Notch portion 10b Notch portion 11a Side edge of connecting portion 11b Side edge of connecting portion 12 Upper end

Claims (7)

[Claims] A container body provided with a flange on an outer periphery of an upper end forming an opening and a knob extending further outwardly from a part of the flange, and an opening in the container body; A liquid food container having a flange portion and a lid material covering an upper surface of the knob portion, wherein the lid portion is heat-sealed to the flange portion in an annular shape, wherein the knob portion is connected to the flange portion. Between the connecting portion and the leading end, a half notch is provided from the lower surface in the width direction on the enlarged portion, and the knob is provided on the tip side with respect to the enlarged portion. A liquid food container, wherein the lid material is heat-sealed to the portion, and the distal end portion of the distal end portion of the knob portion and both side edges of the enlarged portion are formed in an arc shape. 2. A notch extending to an outer peripheral portion of an annular heat seal portion in the flange portion is provided at both side edges of the connecting portion, or both side edges of the connecting portion are formed in an annular shape in the flange portion. The liquid food container according to claim 1, wherein the container reaches the outer peripheral portion of the heat seal portion. 3. The liquid food container according to claim 2, wherein a width of the annular heat seal portion in the flange portion is increased in the connection portion. 4. A heat-seal portion extending at a predetermined interval from the vicinity of both side edges of the connecting portion in a direction not having the knob portion is provided so as to be connected to the inner peripheral side of the annular heat-seal portion in the flange portion. The liquid food container according to claim 2, wherein: 5. The annular heat seal portion of the flange portion is provided with a protruding portion that protrudes beyond the connecting portion toward the knob portion.
The liquid food container according to any one of the above. 6. The liquid food container according to claim 5, wherein the protruding portion is connected to a heat sealing portion of the knob. 7. A container body in which an opening is formed in a substantially rectangular shape and side edges of a flange portion are formed in a straight line except for four corners, wherein the knob is provided at one corner, and a tip is formed from an enlarged portion of the knob. A side edge leading to the portion is configured to be on an extension of a straight side edge of the flange portion, and the half notch is provided substantially parallel to a diagonal line of the opening. A liquid food container according to any one of claims 1 to 6.