JPH0995330A - Closed paper container with opening device - Google Patents

Abstract

(57) [Abstract] [Problem] To improve drainage of the contents poured out from the container,
Be able to prevent dripping. SOLUTION: A through hole 6 is provided in a top wall 7 of a container body 1 formed of a container material 2 in which thermoplastic resin layers 4 and 5 are laminated on the front and back surfaces, and an outer surface of the top wall 7 is provided with a through hole 6 rather than the through hole 6. A synthetic resin lower plate 8 having a small through hole 9 is adhered so that the through hole 9 of the lower plate 8 is located inside the through hole 6 of the top wall 7, and the upper surface of the lower plate 8 is transparent. An upper plate 11 made of synthetic resin having a fitting projection 12 that fits into the hole 9 is superposed by fitting the fitting projection 12 into the through hole 9, and the through hole 6 is formed on the inner surface of the top wall 7. A sealed paper container with an opening device, in which a barrier film (14) for covering is adhered to the periphery of the through hole (6) and the top surface of the fitting projection (12) of the upper plate (11) fitted in the through hole (9) of the lower plate (8). , Two cuts 16 and 17 are formed at a lower end of the lower plate 8 at a predetermined interval, and a degree of freedom of deformation of a portion sandwiched by the cuts 16 and 17 is increased. In adhering to the top wall 7, the portion sandwiched between the two notches 16 and 17 was used as the non-adhesive portion 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed paper container equipped with a simple opening device.

[0002]

2. Description of the Related Art Conventionally, Japanese Utility Model Publication No. 6-27542 is known as a closed paper container equipped with a simple opening device.
In a closed paper container equipped with this opening device, a through hole 6 is provided in a top wall 7 of a container body 1 formed of a container material 2 in which thermoplastic resin layers 4 and 5 are laminated on the front and back surfaces of a paperboard 3. . On the outer surface of the top wall 7, a synthetic resin lower plate 8 having the same or a small through hole 9 as the through hole 6, and the through hole 9 of the lower plate 8 is provided in the through hole 6 of the top wall 7. It is glued so that it is positioned.

On the upper surface of the lower plate 8, a synthetic resin upper plate 11 having a fitting projection 12 that fits into the through hole 9 of the lower plate 8.
However, the fitting protrusion 12 of the upper plate 11 is fitted into the through hole 9 of the lower plate 8 and overlaps with it. Furthermore, on the inner surface of the top wall 7,
The barrier film 14 covering the through holes 6 provided in the top wall 7 is
The periphery of the through hole 6 on the inner surface of the top wall 7 and the top surface of the fitting projection 12 of the upper plate 11 fitted in the through hole 9 of the lower plate 8 are bonded. Further, in the lower plate 8, the lower end 15 thereof is excluded from being adhered to the upper surface of the top wall 7, and is slightly apron-shaped and lifted from the upper surface of the top wall 7 (FIGS. 5 and 5). 7).

[0004]

According to the sealed paper container equipped with the opening device described above, when the container is opened, the upper plate 11 is simply pulled up from the lower plate 8, and
The container can be opened by cutting out the portion of the barrier film 14 adhered to the top surface of the fitting projection 12 of the upper plate 11 and opening the through hole 6 provided in the top wall 7 of the container body 1. Since the lower end 15 of the lower plate 8 floats up from the upper surface of the top wall 7 in an apron shape when the contents are poured out,
This lower tip 15 makes it possible to prevent liquid dripping and prevent liquid dripping.

However, the lower end 15 of the lower plate 8 is
As the means for lifting the lower tip 15, the lower tip 15 is simply excluded from the adhesion (welding) to the upper surface of the top wall 7, so that the lower tip 15 has a small degree of freedom in floating deformation. When the tip 15 is not sufficiently lifted up, the contents may travel along the container and dripping may occur during pouring.

In view of the above points, an object of the present invention is to provide a closed paper container with an opening device which is capable of improving liquid drainage and preventing liquid dripping by sufficiently lifting the lower end of the lower plate. It is what

[0007]

In order to achieve the above-mentioned object, the invention according to claim 1 has a transparent material on a top wall of a container body formed of a container material in which a thermoplastic resin layer is laminated on the front and back surfaces of a paperboard. A synthetic resin lower plate having a hole formed in the outer surface of the top wall and having a smaller through hole than the through hole is melted so that the through hole of the lower plate is located in the through hole of the top wall. An upper plate made of synthetic resin having a fitting projection that fits into the through hole of the lower plate is attached to the upper surface of the lower plate by pressure bonding, and the fitting projection of the upper plate is fitted into the through hole of the lower plate. A barrier film for covering the through holes provided on the top wall is fitted on the inner surface of the top wall and around the through holes on the inner surface of the top wall and the through holes of the lower plate. A closed paper container with an opening device, which is adhered to the top surface of a fitting protrusion of an upper plate, wherein the lower plate is fitted to the inner diameter of a through hole provided in the container material. A cylindrical projecting wall having an inner surface of the cylindrical projecting wall, the inner side of which is a through hole of a lower plate, and the diameter of the through hole is to be fitted with the fitting projecting portion; When the protrusion is fitted to the inner side of the cylindrical protrusion wall, the top surface of the fitting protrusion and the peripheral end surface of the cylindrical protrusion wall are substantially flush with the inner surface of the container. In addition, in the lower plate, a notch is made at two symmetrical positions near the center of the lower tip of the lower plate, and the portion surrounded by the notches is excluded from the adhesion between the lower plate and the top wall of the container body. It is characterized in that the tip of the non-adhesive portion of the lower plate floats up from the top wall surface of the container in an eaves shape.

According to this structure, since two cuts are made at the lower end of the lower plate at a predetermined interval, the degree of freedom of deformation of the portion sandwiched by the two cuts at the lower end is large. . When the lower plate is adhered to the top wall, the non-adhesive portion having a large degree of freedom in deformation is largely deformed by the pressure applied at that time, and the same portion is sufficiently lifted up from the upper surface of the top wall in an eaves-like shape.

Therefore, by pulling up the upper plate from the lower plate, the portion of the barrier film adhered to the top surface of the fitting projection of the upper plate is cut off and the through hole provided in the top wall is opened. , When the container is opened and the contents are poured out from the opening, the contents are well drained by the non-adhesive part that floats like an eaves at the lower end of the lower plate, and the liquid drips to the wall surface of the container surely. To be prevented.

According to a second aspect of the present invention, in the closed paper container with the opening device according to the first aspect, the inner portions of the two cuts formed in symmetrical positions near the center of the lower tip of the lower plate. It is characterized in that the boundary line between the bonded portion and the non-bonded portion connecting the tips is arcuate.

According to this structure, the boundary line between the adhesive portion and the non-adhesive portion is pressed in an arc shape to be adhered, whereby the non-adhesive portion is deformed to a greater extent, and the same portion is deformed from the upper surface of the top wall. The tip of the non-adhesive portion that floats up more is deformed in an arc with respect to the pouring direction of the liquid, whereby the liquid is better drained and the liquid dripping onto the wall surface of the container is more effectively prevented.

According to a third aspect of the present invention, in the method for producing a closed paper container with an opening device according to the first aspect, a container having a through hole for pouring a liquid, which is closed from inside the container with a barrier film. In the process of melting and pressing the lower plate of the opening device separately molded on the upper surface of the top wall of the main body by ultrasonic sealing without superposing the upper plate, the thickness is 0.4 m.
The lower plate having a thickness of m to 0.6 mm is 2.5 kg / cm ² to 4.
It is characterized in that melt-bonding is performed at a sealing pressure of 0 kg / cm ² .

According to this structure, the lower plate has a thickness of 0.4.
By having the thickness of mm to 0.6 mm, the opening device has a necessary strength and when the container is adhered to the top wall of the container body, the protrusion amount of the opening device from the top wall is the carton molding time or the filling of the carton. The amount is not enough to cause trouble on the device when sealed. And the sealing pressure is 2.5
With ^{kg / cm 2 ~4.0kg / cm 2} ,
Make sure that the lower plate is adhered to the top wall and that the non-adhesive part is lifted up.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
This will be described in detail with reference to FIGS. The container material 2 is formed by laminating thermoplastic resin layers 4 and 5 such as polyethylene and polypropylene on the outermost layers on the front and back surfaces of the paperboard 3 and, if necessary, laminating an aluminum foil layer and a barrier synthetic resin layer on the base. A through hole 6 is formed in the top wall 7 of the container body 1 by punching. The thickness of the container material 2 is 0.4 m
It is m to 0.5 mm. On the inner surface of the top wall 7,
A barrier film 14 such as an aluminum foil is heat-sealed around the through hole 6 on the inner surface of the top wall 7 so as to cover the through hole 6 provided in the top wall 7.

On the outer surface of the top wall 7, a lower plate 8 and an upper plate 11 constituting an opening device are attached in the following manner.
The lower plate 8 and the upper plate 11 are made of thermoplastic synthetic resin, and both of them are integrally formed by hinged connection at one end.
The lower plate 8 is provided with a through hole 9 which is smaller than the through hole 6 provided in the top wall 7, and the top wall 7 is provided around the through hole 9.
Cylindrical protruding wall 10 having an outer diameter that fits into the inner diameter of the through hole 6 of
Is provided. The height of the projecting wall 10 is substantially equal to the thickness of the container material 2. On the other hand, the upper plate 1
1, a fitting projection 12 that fits into the through hole 9 of the lower plate 8 is provided downward.

The lower plate 8 and the upper plate 11 can be folded at a hinge portion 21. When the lower plate 8 and the upper plate 11 are folded, the fitting projection 12 is made into a projection wall 1.
It fits into the through hole 9 of the lower plate 8, that is, the top surface of the fitting projection 12 is substantially flush with the peripheral end surface of the projection wall 10.

The lower plate 8 is a container body 1 as described later.
It is adhered to the top wall 7 of the sheet by fusion bonding, but two notches 16 and 17 are provided at left and right symmetrical positions near the center of the lower tip portion 15 located on the lower side when adhered. The portion surrounded by is the non-bonding portion 18. A boundary line 20 between the adhesive portion 19 and the non-adhesive portion 18 connecting the inner ends of the cuts 16 and 17 has an arc shape.

When the opening device constituted by the lower plate 8 and the upper plate 11 is attached to the upper surface of the top wall 7 of the container body 1, the cylindrical protruding wall 10 of the lower plate 8 is attached to the top wall 7. The lower plate 8 is fitted to the through hole 6 and melt-pressed to bond the lower plate 8 to the upper surface of the top wall 7. At this time, the non-bonded portion 18 of the lower plate 8 has two notches 16,
Since it is formed by being surrounded by 17, the degree of freedom of deformation of the non-bonded portion 18 is large, and when the lower plate 8 is bonded to the top wall 7, the pressure applied to the lower plate 8 causes the upper surface of the bonded portion 19 of the lower plate 8 to adhere. Is crushed, and the non-adhesive part 18 is largely deformed by its reaction,
The tip thereof is sufficiently floated from the upper surface of the top wall 7 in the shape of an eaves.

At this time, if the boundary line 20 between the non-adhesive part 18 and the adhering part 19 connecting the inner ends of the notches 16 and 17 is arcuate, the non-adhesive part 18 is deformed to a greater extent.
The same part floats up from the upper surface of the top wall 7 more greatly, and the tip of the floating non-bonding part 18 is deformed into an arc shape in the liquid pouring direction (FIGS. 1 and 3). As a result, drainage is further improved, and dripping is more effectively prevented.

After the lower plate 8 is bonded to the upper surface of the top wall 7 of the container body 1, the upper plate 11 is folded at the hinge portion 21, and the fitting projection 12 of the upper plate 11 is fitted into the through hole 9 of the lower plate 8. Then, the top surface of the fitting projection 12 and the peripheral end surface of the projection wall 10 of the lower plate 8 are bonded to the barrier film 14 provided on the inner surface of the top wall 7.

Explaining this example in more detail, the lower plate 8 having a thickness of 0.4 mm to 0.6 mm is used. When the thickness of the lower plate 8 is 0.4 mm or less, the strength required for the opening device is lost, and the fixed shape cannot be maintained, which makes it difficult to handle when attaching it to the container body 1 and deteriorates the manufacturing efficiency. . When the thickness is 0.6 mm or more, the thickness of the opening device itself is increased, and the top wall 7 of the container body 1 is increased.
When it is mounted on the device, the amount of protrusion from the top wall 7 becomes large, which may cause a trouble on the device at the time of carton molding or filling and sealing of the molded carton.

The sealing pressure when the lower plate 8 is melt-pressed onto the top wall 7 of the container body 1 is 2.5 kg / cm ^{2 to} 4.0.
It is kg / cm ² . This sealing pressure means the air pressure of the air cylinder that pressurizes the lower plate 8 when the lower plate 8 is pressed against the top wall 7. When the sealing pressure is 2.5 kg / cm ² or less, it is difficult to sufficiently lift the non-bonded portion 18 of the lower plate 8. Further, when the sealing pressure is 4.0 kg / cm ² or more, the pressed portion of the lower plate 8 becomes extremely thin, and when it is severe, the portion is broken at this portion.

The cut depths of the two cuts 16 and 17 provided in the lower tip portion 15 of the lower plate 8 are as follows.
The depth required for the proper lifting of the non-adhesive portion 18 of is determined, and is 1.5 m from the peripheral edge of the lower plate 8 toward the through hole 9.
A length of m to 2.5 mm is preferred.

When the depth of the notches 16 and 17 is 1.5 mm or less, which is the distance from the peripheral edge of the lower plate 8 to the peripheral edge of the through hole 9, the non-adhesive portion 18 of the lower plate 8 rises too much,
The effect of running out of liquid when pouring out the contents of the container cannot be expected so much. When the thickness is 2.5 mm or more, the non-bonded portion 1 of the lower plate 8
When 8 is lifted too much and attached to the top wall 7 of the container body 1, the amount of protrusion from the top wall 7 becomes large, which causes troubles on the device during carton molding, filling and sealing of the molded carton, etc. May occur.

It should be noted that the boundary line 20 between the adhesive portion 19 and the non-adhesive portion 18 may be slightly displaced from the edge position of the inner portion of the notches 16 and 17 to the peripheral edge of the lower plate 8. However, also in this case, it is preferable that the distance from the peripheral edge of the lower plate 8 to the boundary line 20 is within the range of 1.5 mm to 2.5 mm for the above reason.

Further, depending on the width of the adhesive portion 19 forming the boundary line 20, the lower plate 8 and the sealing device may possibly occur when the lower plate 8 is sealed to the top wall 7 of the container body 1. Even if there is a slight positional deviation, the positional deviation between the lower plate 8 and the sealing device is absorbed so that the boundary line 20 can be prevented from deviating from the inner ends of the cuts 16 and 17 toward the through hole 9 side. It is preferable that the width be as long as possible. The length of the width of the adhesive portion 19 is from the peripheral edge of the lower plate 8 to the through hole 9
It is preferable that the distance is 20% or more with respect to the distance to the peripheral edge of the lower plate 8, but in this case as well, the position of the boundary line 20 must be within the range of 1.5 mm to 2.5 mm from the peripheral edge of the lower plate 8. .

With this structure, the upper plate 1 is opened when the container is opened.
By pulling up 1 from the lower plate 8, the portion of the barrier film 14 welded to the top of the fitting projection 12 of the upper plate 11 is cut off, and the through hole 6 provided in the top wall 7 of the container body 1 is removed. The container is opened and opened (FIG. 4). Then, when the contents are poured out from the opening, the non-adhesive portion 18 of the lower tip 15 of the lower plate 8 is sufficiently raised from the upper surface of the top wall 7 like an eaves. The contents are drained well, and dripping onto the wall surface of the container is prevented.

[0028]

As described above, according to the present invention, the non-adhesive portion at the lower end of the lower plate adhered to the upper surface of the top wall of the container body can be sufficiently lifted up like an eaves, so that the contents can be poured. When it is taken out, the content is drained well by the non-adhesive part that floats at the lower end of the lower plate, and it is possible to reliably prevent the liquid from dripping onto the wall surface of the container.

[Brief description of drawings]

FIG. 1 is a partially omitted perspective view showing an example of an embodiment of the present invention.

FIG. 2 is an enlarged perspective view showing a lower plate and an upper plate shown in FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is an explanatory view showing a state in which a container is opened by pulling up an upper plate.

FIG. 5 is a partially omitted perspective view showing a conventional example.

6 is an enlarged perspective view showing a lower plate and an upper plate of FIG.

FIG. 7 is an enlarged sectional view taken along line BB of FIG. 5;

[Explanation of symbols]

 1 Paper Container Body 2 Container Material 3 Paperboard 4,5 Thermoplastic Resin Layer 6 Through Hole 7 Top Wall 8 Lower Plate 9 Through Hole 10 Projection Wall 11 Top Plate 12 Fitting Projection 13 Pressure Contact Projection 14 Barrier Film 15 Lower Tip 16 , 17 Notch 18 Non-adhesive part 19 Adhesive part 20 Boundary 21 Hinge part

Claims (3)

[Claims] 1. A through hole is provided in a top wall of a container body formed of a container material in which thermoplastic resin layers are laminated on front and back surfaces of a paperboard, and a through hole smaller than the through hole is provided on an outer surface of the top wall. A synthetic resin lower plate having the same is adhered by fusion bonding so that the through hole of the lower plate is located in the through hole of the top wall, and the upper surface of the lower plate is fitted into the through hole of the lower plate. An upper plate made of synthetic resin having fitting projections to be fitted is polymerized by fitting the fitting projections of the upper plate into the through holes of the lower plate, and further, on the inner surface of the top wall, to the top wall. Sealing with an opening device in which a barrier film covering the provided through-hole is adhered to the periphery of the through-hole on the inner surface of the top wall and the top surface of the fitting projection of the upper plate fitted to the through-hole of the lower plate. In a paper container, the lower plate has a cylindrical projecting wall having an outer diameter that fits into the inner diameter of a through hole provided in the container material, and the inside of the cylindrical projecting wall has a transparent plate of the lower plate. Make a hole , The diameter of the through hole fits with the fitting projection, and further, when the fitting projection fits inside the cylindrical projection wall, the diameter of the fitting projection is the top surface of the fitting projection. The circumferential end surface of the cylindrical protruding wall and the inner surface of the container are substantially flush with each other, and two cuts are made at left and right symmetrical positions near the center of the lower tip of the lower plate. The part surrounded by the notches is excluded from the adhesion between the lower plate and the top wall of the container body, and the tip of the non-adhesive portion of the lower plate is elevated from the top wall of the container in an eaves shape. Closed paper container with opening device. 2. The closed paper container with an opening device according to claim 1, wherein an adhesive portion and a non-adhesive portion that connect the inner ends of two notches formed at symmetrical positions near the center of the lower end of the lower plate. A closed paper container with an opening device, characterized in that the boundary line thereof is arcuate. 3. The method for manufacturing a closed paper container with an opening device according to claim 1, wherein the upper surface of the top wall of the container main body having a through hole for liquid pouring, which is closed from the inside of the container by a barrier film, is separately molded. In the step of melt-pressing the lower plate of the opening device described above by ultrasonic sealing without superposing the upper plate, the lower plate having a thickness of 0.4 mm to 0.6 mm is used.
Method of manufacturing a sealed paper container with an opening device, characterized in that the melt pressed at sealing pressure of ^{5kg / cm 2 ~4.0kg / cm 2} .