JP2001097355A - Thermal insulating cup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal insulating cup having an outer sleeve used in its flat state without applying any special deformation work to the outer sleeve in which a thermal insulating space can be formed in the existing main body cup forming stage without adhering and presenting a thermal insulating material in the thermal insulating space, and provide a cardboard in which a sufficient or substantial sufficient uniform thermal insulating effect can be attained over an entire barrel wall section, a high rigidity at the barrel wall section is got when the board is held with a hand and fingers and has a fine production effect. SOLUTION: A skirt barrel of a main body cup comprised of a barrel and a bottom plate is protruded over its entire circumference to form a protuberance section. A flat outer sleeve is adhered to an upper barrel port and an outer circumferential surface of the protuberance section to form a thermal insulated space. A reduced diameter barrel part 8 of which diameter is reduced over its entire circumference is formed at a barrel wall between a top curl 3 of the barrel wall 2 of the thermal insulating cup and a connecting section between the barrel wall 2 and the bottom plate 5. The outer sleeve covering an entire circumference of the barrel wall of the thermal insulating cup is adhered to an upward or downward barrel wall 2 of the reduced diameter barrel 8 to form a thermal insulating space between the reduced diameter barrel and the outer sleeve.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a heat insulating cup made of a sheet material such as cardboard, which is used as a drinking cup for hot coffee, black tea, green tea and the like, and an instant cup noodle container.

[0002]

2. Description of the Related Art As this kind of heat-insulating cup, Japanese Utility Model No.
No.-45212 (name of the device: insulated paper cup) (hereinafter referred to as device A) and Japanese Utility Model Application Laid-Open No. 6-39717.
Japanese Patent Application Laid-Open Publication No. H10-204,086 (the name of the invention: a heat-insulating paper cup) (hereinafter referred to as the invention B) is known. In the invention A, the bottom c of the outer layer paper b is curled inward as shown in FIG. Since the heat insulating layer d is formed by bringing the curled portion j into contact with the body paper a, there is a problem that a troublesome bottom inner curling step of the cylindrical exterior paper b is required.

The outer layer paper b having the inward curl j
It is extremely difficult to form the lower end of the inward curl in an orderly and cylindrical shape, and there is a problem that the outer surface of the inward curl j has unevenness due to wrinkles.

In the invention B, as shown in FIG. 8, a heat insulating layer h is formed by interposing an embossed paper g as a heat insulating material between a body paper e and an outer layer paper f. There is a problem that a step of bonding the material g between the body paper e and the outer layer paper f is required.

[0005] Further, the above-mentioned conventional inventions A and B both require the addition of a special processing step during the manufacturing process of the heat-insulating paper cup, and thus have the problem that the cost cannot be avoided.

In particular, in the invention A shown in FIG. 7, when a bottom curl j is provided on the inside of the bottom c of the outer layer paper b, the lower end of the body cup made of the body paper a is curled by the curl portion of the outer layer paper b during assembly. j.

As shown in FIG. 13, two upper and lower horizontal ribs H and I are projected from the cup body G so that the lower part of the top curl J of the cup body G and the outer peripheral surface of the lower part of the body G are formed. Then, a cylindrical body L having an inward curl K formed at the lower end is adhered, and is brought into contact with the outer surface of the horizontal ribs H, I or is opposed to the horizontal ribs H at a slight interval. As shown in FIG. 14, the cylindrical body L is prevented from being deformed toward the cup body G when gripped, and as shown in FIG.
A reduced diameter stepped portion N is formed at an upper portion of the upper portion, a portion extending from the reduced diameter stepped portion N to the bottom side wall O is a cup body M close to a straight cylinder, and an upper body portion P above the reduced diameter stepped portion N; An outer sleeve Q is bonded between the bottom side wall O and the cup body M and the outer sleeve Q.
It is known that a heat insulating space R is formed between them.

In the heat-insulating cup shown in FIG. 13, although the deformation of the cylindrical body L at the time of gripping is prevented, the inward curl K has the same problem as that shown in FIG.
The heat insulating cup shown in FIG. 4 also has the problem that the outer sleeve Q is deformed and the heat insulating effect of the outer sleeve Q near the bottom side wall O is lost as in the case shown in FIG.

As a solution to the problems of the heat insulating cup shown in FIGS. 7 and 14, a structure disclosed in Japanese Utility Model Registration No. 2567942 shown in FIG. 15 has been proposed. Is a structure in which a corrugated cardboard V having a corrugated T directed toward the cup body U is used, and upper and lower portions of the single cardboard V are adhered to the upper portion of the cup body U and the bottom side wall W. And the lower sidewall W are in a single inverted frustoconical plane,
The mounting of the single cardboard V involves technical difficulties due to the presence of the corrugate T in terms of uniform mass production, and the problem of unavoidable cost increase in the use of the single cardboard V. Have.

[0010]

In view of the above-mentioned problems of the conventional heat insulating cup, the present invention has a substantially uniform heat insulating property despite the fact that it is made of a sheet material represented by cardboard. Has a strength that does not deform in a normal gripping state, the strength of the bonding portion between the body of the cup and the outer sleeve is large, and the inner portion of the cup at the bonding portion with the outer sleeve in the upper body is an additive. It is an object of the present invention to provide a heat insulating cup which can function as a receiving portion for a saucer such as a spoon and a small spoon, has a relatively simple structure, can be manufactured relatively inexpensively and with high production efficiency.

Further, according to the present invention, a heat-insulating layer can be formed by simply using a flat outer sleeve and projecting a joint portion during a molding process of a body portion. In addition to the fact that it is not required to be combined and the structure is relatively simple, it can be manufactured relatively inexpensively and with high production efficiency. An object of the present invention is to provide a heat insulating cup having a high stationary stability when placed on a flat surface, since the stationary edge can be widened by the thickness of the protrusion formed on the portion.

[0012]

In order to solve the above-mentioned problems, the invention according to claim 1 comprises a trunk, a bottom plate and an outer sleeve, each of which is made of a sheet material represented by cardboard, and a hem trunk of the trunk. The portion is a protrusion protruding over the entire circumference to the outside, a bottom plate is bonded to the protrusion, and a flat exterior sleeve is bonded to the upper body portion of the body and the outer peripheral surface of the protrusion, The heat insulating space is formed between the outer surface of the trunk and the inner surface of the outer sleeve between the upper trunk and the outer peripheral surface of the projection.

According to the second aspect of the present invention, the outer edge of the bottom plate is bonded to the inner surface of the projection, and the lower end of the cylindrical outer sleeve is joined to the outer surface of the projection. Of the invention.

According to the third aspect of the present invention, a configuration in which an adhesive portion between the upper trunk portion, the hem trunk portion, and the outer sleeve is a pressure adhesive portion is added to the first or second aspect of the present invention.

According to a fourth aspect of the present invention, at least one ridge, which is a peter wire that contacts the inner surface of the outer sleeve, is provided between the upper torso portion and the protrusion of the torso portion. It has been added to the invention of claim 1, claim 2, or claim 3.

According to the fifth aspect of the present invention, the upper torso portion below the top curl of the torso wall of the heat insulating cup made of a sheet material represented by cardboard, and the hem torso below the joint between the torso wall and the bottom plate. A reduced diameter body recessed inside the container is formed over the entire circumference of the body wall between the upper and lower parts, and the entire outer surface of the body wall is formed on the outer surface of the upper body and the hem body of the body wall. 4. A structure in which an outer sleeve to be covered is bonded to form a heat insulating space between the outer sleeve and a reduced diameter trunk portion between the upper trunk portion and the hem trunk portion. Of the invention.

According to a sixth aspect of the present invention, a configuration in which a step portion close to an upward horizontal plane is formed at the reduced diameter portion of the body wall in the upper body portion is added to the invention of the fifth aspect.

According to a seventh aspect of the present invention, a configuration is provided in which the adhesive projection to the inner surface of the outer sleeve is formed over the entire circumference in the central region of the reduced diameter body portion. And

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
An example of an embodiment in which the inventions are applied together is shown. In the trunk portion 20 made of a cardboard material, the section of the height h of the hem trunk portion 7 is outwardly protruded by the radius r over the entire circumference, and the protruding portion 22 is formed. It has been.

As shown in FIGS. 4 and 5, the projecting portion 22 of the illustrated embodiment has a double structure in which the lower side portion 27 of the hem trunk portion 7 of the body portion 20 is folded inward at the lower edge 23 of the projecting portion 22. Outer edge 24 bent downward from the periphery of the bottom plate 5
Are sandwiched between the protruding portion 22 and the lower side portion 27,
Both sides of the outer edge portion 24 are adhesively fixed.

The body cup 19 formed by the body 20 and the bottom plate 5 in the embodiment shown in FIG. 1 has an outward top curl 3 formed at the opening edge, and the upper body 4 which is the immediate lower part thereof. A flat outer sleeve 9 is adhered to the outer peripheral surface of the protruding portion 22 at the inner surface of the upper edge portion and the inner surface of the lower end portion 25, and a body between the upper trunk portion 4 and the outer peripheral surface of the protruding portion 22 is formed. The heat insulating space 10 is formed between the outer surface 21 and the inner surface 16 of the outer sleeve 9.
Is not always required, and may be replaced with an outward flange or the like.

In the embodiment shown in FIGS. 1 to 6, the lower portion 27 of the body 20 is bent inward at the lower edge 23 of the protruding portion 22, so that the lower portion 27 extends downward from the periphery of the bottom plate 5. The bent outer edge portion 24 is sandwiched between the protruding portion 22 and the lower side portion 27 and is bonded and fixed. In the invention of claim 1, the bonding and fixing structure between the protruding portion 22 and the bottom plate 5 is provided. There is no particular limitation, and it is a matter of course that any bonding and fixing structure may be used.

According to the third aspect of the present invention, the bonding portion between the upper torso portion 4, the hem torso portion 7, and the outer sleeve 9 is a pressure bonding portion.

FIG. 2 shows claims 1, 2 and 4.
1 shows an embodiment in which the inventions of the present invention are also applied. The bonding and fixing of the body 20 and the bottom plate 5 are performed by the main body cup 1 shown in FIG.
9 is the same structure as that of FIG.
6, 26A are formed, and the protrusions 26, 26A and the inner surface 16 of the outer sleeve 9 can be bonded to each other.

In this embodiment, the protrusion height of the ridge 26A, which is a Peter line, is set to be equal to the height of the ridge 26, which is a Peter line, so that the heat insulating space 10A is formed to have a substantially uniform thickness from the upper part to the lower part of the main body cup 19. It is set slightly lower than The number of ridges to be formed is not limited to two as shown, but may be one of the ridges 26 or 26A, or three or more.

As shown in FIGS. 1, 3 to 6, the present invention relates to a method of forming a main body cup 19 comprising a body 20 and a bottom plate 5 in a current molding line. 22 can be molded.

In the step of forming the bottom of the main body cup 19 by the body 20 and the bottom plate 5 as shown in FIG. 3, the projecting portion 22 can be formed as shown in FIG. is there.

The molding method of the present invention can be achieved by adding any of the following means to the existing molding line for the main body cup 19. As a means for bonding, the body and the bottom plate are bonded and bonded together, and at the same time, the bonded portions are projected outward. Glue the body and bottom plate with the current body molding line,
After joining, the joining portion is made to project outward in a continuous process. The hem trunk portion is made to protrude outward in advance, and a bottom plate is attached to the protruding portion to be adhered and connected to the trunk portion. There are various means.

After the above-mentioned protruding portion is formed, the outer sleeve is bonded and connected to the main body cup. As a connecting means, the main body cup is inserted and connected to a flat cylindrical outer sleeve which has been sealed in advance. Alternatively, a flat outer sleeve may be wound around the main body cup and adhesively bonded.

As shown in FIGS. 4, 5 and 6, the form of the projection 22 formed by the body 20 and the bottom plate 5 may be modified, and the outer sleeve 9 may be joined to the projection 22 somewhat. Make a difference.

In any of the projections, the trunk 2
The heat insulation space 10 is formed widely between the outer sleeve 9 and the outer sleeve 9.

In the case of the present invention, when the protruding portion 22 is formed as shown in FIG. 4 by applying the protruding force k to the shape of FIG. 3, the trunk portion 20, its lower side portion 27, the bottom plate 5, and its outer edge portion 24 are formed. Voids are formed in the bent portions 28, 29, 30 of
Due to the presence of the adhesive layer 31, liquid leakage, infiltration and the like do not occur.

As shown in FIG. 5, the lower part 2 of the trunk 20
If there is an interval between the tip 32 of 7 and the back of the bottom plate 5,
Since the distal end 32 and the bent portion 30 of the bottom plate 5 do not overlap, no gap is formed between the bent portion 28 and the bent portion 30, and the adhesiveness is further improved.

As shown in FIG. 6, the projecting portion 22A is
The outer diameter is enlarged at the lower end, and an outer sleeve 9 is provided on the outer surface near the lower end.
Is bonded, the bottom edge of the container is enlarged in diameter as compared with that shown in FIG. 4 or FIG. 5, so that the stationary stability of the container is improved.

FIGS. 9 and 10 show an embodiment in which the inventions of claims 3, 5 and 6 are applied together. A synthetic resin film for imparting water resistance to cardboard is laminated. Insulation cup 1 made of water-resistant cardboard
Is recessed inwardly of the container over the entire circumference between the upper torso portion 4 below the top curl 3 and the hem torso portion 7 below the joint 6 between the torso wall 2 and the bottom plate 5. A reduced diameter body portion 8 is formed.

An outer sleeve 9 covering the entire outer surface of the torso wall 2 is adhered to the outer surface of the upper torso portion 4 and the hem torso portion 7 of the torso wall 2.

With the above-described structure, the heat insulating space 10 is formed between the reduced diameter body portion 8 between the upper body portion 4 and the hem body portion 7 and the outer sleeve 9, and the upper and lower sides of the heat insulating space are formed by the upper body. Adhesion portions 11, 1 of portion 4, hem trunk portion 7, and exterior sleeve 9
It is 2.

The bonding portions 11, 12 of the upper torso portion 4, the hem torso portion 7, and the outer sleeve 9 are press-bonded portions which have been subjected to a molding action and an adhesive action from both inner and outer side surfaces thereof by pressing by a molding die. The upper end of the reduced diameter body portion 8 is formed in a stepped portion 13 close to an upward horizontal plane, and the two bonded portions 1 are formed.
1 and 12 also have a multiplexed structure in which they are in close contact with each other, and their rigidity is improved.

Since the step portion 13 is formed close to an upward horizontal surface, the periphery of a saucer or the like is hung on the step portion 13 so that an additive to the contents or a small spoon is placed on the upper part of the heat insulating cup 1. The placed saucer can be stably stored.

FIGS. 11 and 12 show two embodiments in which the fourth, third, fifth, sixth and seventh aspects of the present invention are applied together. Are exactly the same as those shown in FIG. 9 and FIG. 10, and the description thereof will be omitted, and only the portions to which the invention of claim 7 is applied will be described.

In the embodiment shown in FIG. 11, an adhesive projection 17 adhered to the inner surface 16 of the outer sleeve 9 is formed by embossing the reduced diameter body 14 over the entire circumference of the central area of the reduced diameter body 14. In this case, it is bonded to the inner surface 16 of the outer sleeve 9 by appropriate means to improve the shape retention performance in the central area of the heat insulating space 10 and reduce the deformation of the container body when the heat insulating cup 1 is grasped. Things.

FIG. 12 shows an adhesive projection 18 formed over the entire periphery of the central region of the reduced diameter body 15 by using a foaming adhesive such as styrene or cardboard to form the outer surface of the reduced diameter body 15 and the outer sleeve 9. It is configured to be bonded to the inner surface 16 and has the same function as the bonding projection 17 shown in FIG.

[0043]

According to the first aspect of the present invention, since the skirt portion of the trunk portion projects outward over the entire circumference, the heat insulating space is easily and reliably formed.

Further, there is no need to perform processing on the outer sleeve such as bottom curling or bonding with a heat insulating material.

Since the outer sleeve is flat, in the second aspect of the invention, the outer sleeve and the body cup can be easily bonded.

In the current forming line of the main body cup, the protruding portion of the body cup hem body portion can be formed. That is, the protrusions can be formed in the bottom forming step. Therefore, the molding cost is low.

Further, the stationary edge portion can be widened by the thickness of the protruding portion formed on the hem body portion, so that the stationary stability when it is stationary on a flat surface is increased.

Since the protruding portion is formed on the hem body portion over the entire circumference, the strength of the bottom edge of the container in the radial direction is improved.

According to the second aspect of the present invention, in addition to the first aspect, the strength of the bottom edge of the container is further improved by joining the outer sleeve.

According to the third aspect of the present invention, since the bonding portion between the upper trunk portion, the hem trunk portion, and the outer sleeve is a pressurized portion and the rigidity thereof is improved, even if the finger is held directly under the top curl, it can be gripped. Deformation of the gripping part is small, and even if the heat-insulating cup with the contents is slightly violently placed on the mounting plane, the heat-insulating cup can be prevented from falling over due to deformation of the hem body, etc. It works.

According to the fourth aspect of the present invention, since the Peter wire is protruded from the body of the first or second aspect of the invention, the pressure resistance of the body of the container is further improved. Further, the deformation of the outer sleeve can be prevented, and the heat insulating space is maintained, and thus the heat insulating effect is further improved.

According to the fifth aspect of the present invention, the reduced-diameter trunk portion in which the space between the upper trunk portion below the top curl of the trunk wall and the hem trunk portion, which is the connecting portion between the trunk wall and the bottom plate, is depressed over the entire circumference. Since the entire outer surface of the torso wall is covered on the outer surface of the upper torso portion and the hem torso portion, and a heat insulating space is formed between the outer sleeve and the bonded outer sleeve, the heat insulating space of the torso wall of the heat insulating cup is formed. There is an effect that the trunk wall other than the upper trunk portion below the top curl can have a substantially uniform heat insulating effect.

In the invention of claim 6, since the reduced diameter portion of the torso wall in the upper torso portion forms a step near the upward horizontal plane, this step is formed when the upper part of the torso wall is gripped by a finger. It functions as a part reinforcing material, prevents deformation of the body wall, and also serves as a receiving part for saucers to be inserted into the heat insulating cup, and separates additives and small spoons from the contents from the contents. This has the effect of being useful when storing it.

According to the seventh aspect of the present invention, the central region of the reduced diameter body is adhered to the inner surface of the outer sleeve by the adhesive convex portion, and the adhesive convex portion serves as a reinforcing portion extending over the entire periphery of the central region, and This prevents the outer sleeve from being deformed when the center of the container is gripped by a finger, and has the effect of not impairing the heat insulation of the container body.

Further, any of the inventions according to claims 5 to 7 has an effect of maintaining a high productivity because there is no structural part which involves difficulty in molding technology in the production process.

[Brief description of the drawings]

FIG. 1 is a side view showing a cross section of a half part of an embodiment to which the inventions of claims 1 and 2 are applied.

FIG. 2 is a side view showing a cross section of a half portion of an embodiment to which the inventions of claims 1, 2 and 4 are applied.

FIG. 3 is an enlarged partial longitudinal sectional view of an example of a bottom of a conventional body cup.

FIG. 4 is an enlarged partial longitudinal sectional view of one example of an embodiment showing a form of a projecting portion at the bottom of the main body cup.

FIG. 5 is an enlarged partial longitudinal sectional view similar to FIG. 4 of another embodiment.

FIG. 6 is an enlarged partial longitudinal sectional view similar to FIG. 4 showing another example of another embodiment.

FIG. 7 is a longitudinal sectional view of a conventional example.

FIG. 8 is a vertical sectional view of another conventional example.

FIG. 9 is a side view showing a cross section of a half part of an embodiment to which the inventions of claims 3, 5 and 6 are applied.

FIG. 10 is an enlarged cross-sectional view showing a main part of FIG.

FIG. 11 is a side view showing a half section of an embodiment in which the invention of claim 7 is applied to the embodiment shown in FIG. 9 as a cross section.

FIG. 12 is a side view showing a half part of another embodiment in which the invention of claim 7 is applied to the embodiment shown in FIG. 9 as a cross section.

FIG. 13 is a half sectional vertical sectional view of an example of another conventional heat insulating cup.

FIG. 14 is a half vertical sectional view of an example of a further different conventional heat insulating cup.

FIG. 15 is a half sectional view of an example of a conventional improved heat insulating cup.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulation cup 2 Body wall 3 Top curl 4 Upper body part 5 Bottom plate 6 Joining part 7 Hem body part 8, 14, 15 Reduced diameter body part 9 Exterior sleeve 10 Heat insulation space 11, 12 Pressure bonding part 13 Stepped part 16 Exterior Sleeve inner surface 17, 18 Adhesive projection 19 Body cup 20 Body 21 Body outer surface 22, 22A Projection 23 Lower edge 24 Outer edge 25 Outer sleeve lower end 26, 26A Projection streak as Peter line 27 Lower side 28, 29, 30 Bent part 31 Adhesive layer 32 Hem trunk tip 33 Outer peripheral surface

Claims (7)

[Claims] 1. A body, a bottom plate and an outer sleeve, each of which is made of a sheet material typified by cardboard, wherein a hem body portion of the body is formed as a protrusion protruding outwardly over the entire circumference. A bottom plate is bonded to the upper body, and a flat outer sleeve is bonded to the upper torso portion of the torso and the outer peripheral surface of the protruding portion. An insulating cup in which an insulating space is formed between the sleeve and the inner surface of the sleeve. 2. The heat insulating cup according to claim 1, wherein an outer edge of the bottom plate is adhered to an inner surface of the projection, and a lower end of a cylindrical outer sleeve is adhered to an outer surface of the projection. 3. The heat-insulating cup according to claim 1, wherein the bonding portion between the upper trunk portion, the hem trunk portion, and the outer sleeve is a pressure bonding portion. 4. At least one protruding ridge, which is a Peter line that contacts the inner surface of the outer sleeve, protrudes between the upper trunk portion and the projection of the trunk portion. An insulated cup according to claim 3. 5. An insulating cup in which a body wall, a bottom plate and an outer sleeve are formed by a sheet material represented by cardboard, an upper body portion below a top curl of the body wall, a body wall and a bottom plate. A crimped trunk portion depressed toward the inside of the container is formed over the entire periphery of the trunk wall between the lower trunk portion and the lower hem trunk portion. 4. The heat insulating cup according to claim 1, wherein an outer sleeve covering the entire outer surface of the part wall is adhered, and a heat insulating space is formed between the warped barrel and the outer sleeve. 6. The heat-insulating cup according to claim 5, wherein the reduced diameter portion of the body wall in the upper body portion forms a stepped portion close to an upward horizontal plane. 7. A convex portion for bonding to the inner surface of the outer sleeve is formed over the entire periphery in a central region of the shrinking trunk portion.
Or the heat insulating cup according to claim 6.