WO2002004300A1

WO2002004300A1 - Heat insulated cup

Info

Publication number: WO2002004300A1
Application number: PCT/JP2001/001634
Authority: WO
Inventors: Keiichi Omori
Original assignee: Jujo Central Co., Ltd.
Priority date: 2000-07-10
Filing date: 2001-03-02
Publication date: 2002-01-17
Also published as: TW505599B; CN1242901C; KR20020025260A; CN1386104A; AU2001236061A1; KR100792097B1

Abstract

A heat insulated cup, wherein a bottom shell portion of a main body cup comprising a shell part and a bottom plate is projected upward all around the periphery thereof so as to form a projected part, a flat external sleeve is bonded to an upper shell portion and to the outer peripheral surface of the projected part so as to form a heat insulated space, a reduced diameter shell part (8) reduced in diameter all around the periphery thereof is formed on a shell part wall between a top curl (3) of a shell part wall (2) of the heat insulated cup and a connection part of the shell part wall (2) to a bottom plate (5), and an external sleeve covering all around the shell part wall of the heat insulated cup is bonded to the upper and lower shell part walls (2) of the reduced diameter shell part (8) so as to form the heat insulated space between the reduced diameter shell part and the external sleeve.

Description

Background of the invention

The present invention relates to an improvement of a heat insulating cup made of a sheet material represented by cardboard, which is used as a drinking cup for hot coffee, black tea, green tea and the like, an instant cup container, and the like.

Examples of this type of heat-insulating cup include a device disclosed in Japanese Utility Model Laid-Open No. 4-45221 (name of the device: heat-insulating paper cup) (hereinafter referred to as Device A), and Japanese Utility Model Application Laid-Open No. 6-397177. The invention (the name of the invention: heat-insulating paper cup) (hereinafter referred to as invention B) is known. In invention A, as shown in Fig. 7, the bottom c of the outer layer paper b is curled inward, and the curl is applied. The heat insulating layer d is formed by bringing the part j into contact with the body paper a, and there is a problem that a troublesome bottom inner curling step of the cylindrical exterior paper b is required.

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

Invention B, as shown in Fig. 8, is to form a heat insulating layer h by interposing embossed paper g as a heat insulating material between the body paper e and the outer layer paper f, and to separately form the embossed heat insulating material g. There is a problem that requires a step of laminating between the body paper e and the outer layer paper f.

Furthermore, both the above-mentioned conventional inventions A and B require a special processing step during the manufacturing process of the heat-insulating paper cup, and thus have a problem that the cost is unavoidable.

In particular, in the invention A shown in Fig. 7, when a bottom curl j is provided inside the bottom c of the outer layer paper b, the lower end of the body cup made of the body paper a catches the curl j of the outer layer paper b during assembly. There is also a problem that a defect is apt to occur in the joining process of both. Also, as shown in Fig. 13, two upper and lower horizontal ribs H and I project from the cup body G, and 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 under A cylindrical body L having an inward curl K formed at the end is adhered, and is brought into contact with the outer surface of the horizontal ribs H and I, or is faced at a slight interval, and grips the cup body G with fingers. In this case, the cylindrical body L is prevented from being deformed toward the cup body G side when it is pressed, or as shown in FIG. 14, a reduced diameter step N is formed on the upper part of the cup body M. A portion between the step N and the bottom side wall 〇 is a cup body M close to a straight cylinder, and an outer sleeve Q is bonded between the upper body P above the reduced diameter step N and the bottom side wall O, It is known that a heat insulating space R is formed between the cup body M and the outer sleeve Q.

In the heat-insulating cup shown in FIG. 13, the deformation of the cylindrical body L during gripping is prevented, but the inward curl K has the same problem as that shown in FIG. 7, and the heat-insulating cup shown in FIG. The cup also has the problem of deformation of the outer sleeve Q and loss of the heat insulating effect of the outer sleeve Q near the bottom side wall 0 as shown in FIG.

As a solution to the problems of the insulation gap shown in Figs. 7 and 14, a structure with the structure described in the registered utility model No. 2 567 7942 shown in Fig. 15 is also proposed. However, a corrugate T with a corrugated T facing the cup body U is used as the exterior sleeve S, and the upper and lower portions of the cardboard V are bonded to the top and bottom side walls W of the cup body U. Yes, since the upper part of the cup body U and the lower side wall W are in a single inverted frustoconical surface, the single cardboard V is mounted on the corrugated T in terms of homogeneous mass production. Due to its existence, there are technical difficulties, and there is a problem that the use of one-sided corrugated cardboard V cannot avoid cost increase.

Overview of the invention

In view of the above-mentioned problems of the conventional heat insulating cup, the present invention has an advantage that the heat insulating properties of the trunk portion are substantially uniform, despite being made of sheet material represented by cardboard, It has a strength that does not deform, the strength of the adhesive part between the body of the cup and the outer sleeve is large, and the inner part of the cup at the part of the upper body that adheres to the outer sleeve is made of an additive, small spoon, etc. It is an object of the present invention to provide an insulated cup that can function as a receiving portion of a saucer, has a relatively simple structure, and can be manufactured at a relatively low price with high production efficiency.

In addition, the present invention uses a flat outer sleeve, and can form a heat insulating layer only by projecting a joining portion during a molding process of a trunk portion, and can perform bottom curling and It eliminates the need for laminating heat insulating materials, and because of its relatively simple structure, it can be manufactured relatively inexpensively and with high production efficiency, as well as conventional heat insulating cups of the same shape and capacity. On the other hand, the stationary edge can be widened by the thickness of the protruding part formed on the hem body, so that it is possible to provide a heat insulating cap with high stationary stability when placed on a flat surface. It is an issue.

In order to solve the above problem, in the invention of claim 1, each of the body, a bottom plate, and an outer sleeve made of a sheet material represented by cardboard is provided, and a hem body portion of the body is outwardly formed over the entire circumference. A bottom plate is bonded to the protruding portion, and a flat exterior sleeve is bonded to the upper torso portion of the body portion and an outer peripheral surface of the protruding portion. A heat insulating space is formed between the outer surface of the body and the inner surface of the outer sleeve between the outer surface of the outer sleeve and the inner surface of the outer sleeve.

According to the second aspect of the present invention, the outer peripheral portion of the bottom plate is bonded to the inner surface side of the protruding portion, and the lower end portion of the cylindrical outer sleeve is joined to the outer surface side of the protruding portion. Added.

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

According to the invention of claim 4, at least one protruding line, which is a p-line, which comes into contact with the inner surface of the outer sleeve, is protruded between the upper trunk portion of the trunk portion and the projecting portion. 1, or added to the invention of claim 2 or claim 3.

According to the invention of claim 5, the upper torso portion below the top curl of the torso wall of the heat insulating cup made of a sheet material represented by thick paper, and the hem torso portion below the joint between the torso wall and the bottom plate are provided. Exterior that forms a reduced diameter body recessed inside the container over the entire circumference of the body wall between the outer walls of the body wall and covers the entire outer surface of the body wall on the upper body part and the hem body part of the body wall The invention according to claim 1, 2, or 3, wherein the sleeve is bonded to form a heat insulating space between the outer diameter sleeve and the outer diameter sleeve between the upper trunk portion and the hem trunk portion. Added to

According to the 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 trunk wall in the upper trunk portion is added to the fifth aspect of the invention.

According to the invention of claim 7, an adhesive convex portion with the inner surface of the outer sleeve is provided in a central region of the reduced diameter body portion. The configuration of forming over the entire circumference is added to the invention of claim 5 or claim 6.

BRIEF DESCRIPTION OF THE FIGURES

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

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

FIG. 3 is an enlarged partial vertical cross-sectional view of an example of the bottom of a conventional main body power switch.

FIG. 4 is an enlarged partial longitudinal sectional view of one example of the embodiment showing a form of a projecting portion at the bottom of the main body power 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 an example of still another embodiment. FIG. 7 is a longitudinal sectional view of a conventional example.

FIG. 8 is an axial vertical sectional view of another conventional example.

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

FIG. 10 is an enlarged cross-sectional view of the main part of FIG. FIG. 11 is a side view showing, as a cross section, a half part of an embodiment in which the invention of claim 7 is applied to the embodiment shown in FIG.

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

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

FIG. 14 is a half-section longitudinal sectional view of an example of a further different conventional heat insulating cup. FIG. 15 is a half cross-sectional view of an example of a conventional improved heat insulating cup.

Embodiment of the Invention

Fig. 1 shows an embodiment in which the inventions of claim 1 and claim 2 are applied together. The body 20 made of cardboard has a section of height h of the hem body 7 that is entirely outward. The protrusion protrudes by a radius of r over the circumference to form a protrusion 22.

As shown in FIGS. 4 and 5, the protrusion 22 of the illustrated embodiment is The lower side part 27 has a double structure in which the lower part 23 is bent inward at the lower part 23 of the protruding part 22, and the outer edge part 24 bent downward from the peripheral edge of the bottom plate 5 includes The outer edge portion 24 is sandwiched between the portion 27 and is adhesively fixed on both surfaces of the outer edge portion 24.

The main body push 19 formed by the body portion 20 and the bottom plate 5 of the embodiment shown in FIG. 1 has an outward top curl 3 at the opening edge, and the upper body portion 4 immediately below the top curl 3. And an outer peripheral surface of the protruding portion 22, a flat outer sleeve 9 is adhered at an inner surface of an upper edge portion and an inner surface of a lower end portion 25, and an outer peripheral surface of the upper trunk portion 4 and an outer peripheral surface of the protruding portion 22 are provided. A heat-insulating space 10 is formed between the outer surface 21 of the body between the outer sleeve 21 and the inner surface 16 of the outer sleeve 9, but the top curl 3 is not always required, and an outward flange or the like is formed. Of course, it may be substituted.

In the embodiment shown in FIGS. 1 to 6, the lower edge 23 of the protrusion 22 has a double structure in which the lower edge 27 of the trunk 20 is bent inward. The outer edge portion 24 bent downward is sandwiched between the protruding portion 22 and the lower side portion 27 and is adhered and fixed. According to the invention of claim 1, the protruding portion 22 and the bottom plate 5 are provided. There is no particular limitation on the bonding and fixing structure with the above, and it is a matter of course that any bonding and fixing structure may be used.

According to the invention of claim 3, the bonding portion between the upper trunk portion 4, the hem trunk portion 7, and the exterior sleeve 9 is a pressure bonding portion.

FIG. 2 shows an embodiment in which the inventions of claims 1, 2 and 4 are applied together. 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 has the same structure as that of FIG. 9, but is formed on the outer peripheral surface 33 of the torso 20 with ridges 26, 26 A, which are the p-line which abuts the inner surface 16 of the outer sleeve 9. 6, 26 A and the inner surface 16 of the exterior sleeve 9 can be bonded.

In this embodiment, the protruding height of the protruding line 26A is set so that the heat insulating space 1OA 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 height of Article 26. The number of ridges to be formed is not limited to two as shown in the figure, but may be any one of the ridges 26 or 26 A, or three or more. Is also good.

As shown in FIG. 1, FIG. 3 to FIG. 6, the present invention is based on the current molding line of the body cup 19 comprising the body 20 and the bottom plate 5, and the protrusion of the hem body part 7 of the body cup 19 22 can be molded.

In the step of forming the bottom of the body cup 19 by the body 20 and the bottom plate 5 as shown in FIG. 3, by applying the projection force k to the outside, the protrusion 22 can also be formed as shown in FIG. It is.

The molding method of the present invention can be achieved by adding any of the following means to the current molding line for the main body cup 19. As a means,

(1) Attach and join the torso and the bottom plate, and at the same time make the joints project outward.

(2) The body and the bottom plate are glued and joined at the current body molding line, and the joint is projected outward in a continuous process.

(3) The hem trunk is projected outward in advance, and the bottom plate is attached to the projected part, and the hem is bonded to the trunk and joined. -There are various means.

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

As shown in FIG. 4, FIG. 5, and FIG. 6, the form in which the projecting portion 22 is formed by the body 20 and the bottom plate 5 may be modified, and the outer sleeve 9 may be joined to the projecting portion 22 somewhat. Make a difference.

Regardless of the form of the protruding portion, the heat insulating space 10 is widely formed between the body portion 20 and the outer sleeve 9.

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

As shown in FIG. 5, if there is an interval between the tip 32 of the lower side 27 of the trunk 20 and the back surface of the bottom plate 5, the bent portion 30 of the tip 32 and the bottom plate 5 does not overlap. However, there is no gap between the bent portion 28 and the bent portion 30 and the adhesiveness is further improved. Also, as shown in FIG. 6, when the protrusion 22A is enlarged at the lower end and the outer sleeve 9 is adhered to the outer surface near the lower end, the bottom edge of the container becomes smaller than that shown in FIG. 4 or FIG. As a result of the expansion, the stationary stability of the container is improved.

FIG. 9 and FIG. 10 show an embodiment in which the inventions of claims 3, 5 and 6 are combined, wherein a synthetic resin film for imparting water resistance to cardboard is laminated. In the body wall part 2 of the heat insulating cap 1 made of water-resistant cardboard, the upper body part 4 below the top curl 3 and the hem body part 7 below the joint 6 between the body wall 2 and the bottom plate 5 A reduced diameter body portion 8 recessed into the container is formed over the entire circumference between the two. 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 configuration, 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 exterior sleeve 9, and the upper and lower portions of the heat insulating space are the upper body portion. 4 and the hem trunk 7 and the exterior sleeve 9 are bonded to each other.

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

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

FIGS. 11 and 12 show two examples in which the four inventions of claim 3, claim 5, claim 6, and claim 7 are applied together. The configuration of each part other than 5 is exactly the same as that shown in FIGS. 9 and 10, and therefore the description thereof will be omitted, and the application portion of the invention of claim 7 will be described below.

In the embodiment shown in FIG. 11, the adhesive projection 17 bonded to the inner surface 16 of the exterior sleeve 9 is embossed against the reduced diameter body 14 over the entire circumference of the central area of the reduced diameter body 14. It is molded by processing and is adhered to the inner surface 16 of the outer sleeve 9 by appropriate means to improve the shape retention performance in the center area of the heat insulating space 10 and change the shape of the container body when grasping the heat insulating cup 1. This is to reduce distortion.

Fig. 12 shows the adhesive projection 18 formed over the entire circumference of the central region of the reduced diameter body 15 made of foaming adhesive styrene or cardboard, etc., and the outer surface of the reduced diameter body 15 and the outer surface. It is configured to be bonded to the inner surface 16 of the leave 9 and has the same function as the bonding projection 17 shown in FIG.

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

Also, there is no need to process the outer sleeve such as bottom curl processing or lamination with heat insulating material.

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

The protruding part of the body cup hem body can be formed in the current body cup forming line. That is, the protrusion can be formed in the bottom forming step. Therefore, the molding cost is low. Furthermore, since the stationary edge portion can be widened by the thickness of the protruding portion formed in the hem body portion, the stationary stability when the substrate is left standing on a flat surface is increased.

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

According to the invention of claim 2, in addition to the invention of claim 1, 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, the bonding portion between the upper torso portion, the hem torso portion, and the outer sleeve is a pressurized portion, and its rigidity is improved. Place the heat-insulating cup with little deformation and the contents in it.Even if the heat-insulating cup is slightly violently placed on a flat surface, it can effectively prevent the heat-insulating cup from overturning due to deformation of the hem body. To play.

According to the fourth aspect of the present invention, since the P-line is projected from the body of the first or second aspect of the invention, the pressure resistance of the body of the container is further improved. In addition, 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 invention of claim 5, the reduced diameter body portion in which a portion between the upper body portion below the top curl of the body wall and the hem body portion which is a connection portion between the body wall and the bottom plate is depressed over the entire circumference, Is on The entire outer surface of the torso wall is covered on the outer surface of the torso portion and the hem torso portion, and an insulating space is formed between the bonded exterior sleeves. There is an effect that the trunk wall other than the upper trunk portion 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, the step is reinforced by the fingers when gripping the upper part of the torso wall. It functions as a material, prevents deformation of the body wall, and also serves as a receiving part for saucers to be inserted into the heat-insulating cup.Additives to cup contents カ Small spoons etc. are separated from the contents and stored It has effects such as being useful when doing.

According to the invention of claim 7, the central region of the reduced diameter trunk portion is adhered to the inner surface of the exterior sleeve by an adhesive convex portion, and the adhesive convex portion serves as a reinforcing portion over the entire periphery of the central region, The effect of preventing deformation of the outer sleeve when the center of the container is grasped by a finger and preventing the heat insulation of the container body from being impaired.

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

Claims

The scope of the claims

1. A body, a bottom plate, and an outer sleeve, each of which is made of a sheet material represented by cardboard, and a hem body portion of the body is a protrusion protruding outward over the entire circumference, and a bottom plate is formed on the protrusion. A flat outer sleeve is bonded to the upper torso portion of the torso and the outer peripheral surface of the protruding portion, and a torso outer surface and an outer sleeve inner surface between the upper torso portion and the outer peripheral surface of the protruding portion are bonded. A heat insulating space between which a heat insulating space is formed.

2. The heat insulating cap according to claim 1, wherein an outer edge of the bottom plate is bonded to an inner surface of the protrusion, and a lower end of a cylindrical outer sleeve is bonded to an outer surface of the protrusion.

3. The heat-insulating cup according to claim 1, wherein a 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 pie line that contacts the inner surface of the outer sleeve, protrudes between the upper torso portion and the protruding portion of the torso. Insulation cup according to 3.

5. In the heat-insulating cup where the body wall, bottom plate and outer sleeve are formed by sheet material represented by cardboard,

A warped cylinder that is recessed inside the container over the entire circumference of the body wall between the upper body part below the top curl of the body wall and the hem body part below the joint between the body wall and the bottom plate. Part is formed,

An outer sleeve covering the entire outer surface of the torso wall is adhered to the outer surfaces of the upper torso portion and the hem torso portion,

4. The heat insulating cap according to claim 1, wherein a heat insulating space is formed between the warped trunk and the outer sleeve.

6. The heat insulating cap according to claim 5, wherein the warped portion of the body wall in the upper body portion forms a stepped portion close to an upward horizontal plane.

7. The heat insulating cap according to claim 5, wherein a convex portion for bonding to the inner surface of the outer sleeve is formed over the entire circumference in a central region of the warping trunk portion.