JPH088980Y2 - Insulation paper cup - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a heat insulating paper cup, and more particularly to a heat insulating paper cup having a peripheral wall having a double wall structure of an inner peripheral wall and an outer peripheral wall, and forming a heat insulating space between the both walls.

[Prior art]

Conventionally, various heat insulating cups have been provided. Usually, this type of heat insulating cup is formed as a resin molded product such as styrofoam. On the other hand, in the heat-insulating paper cup using paper as the material, there is no one that can be mass-produced at low cost and has excellent heat insulating property.

[Problems to be solved by the device]

Therefore, the technical problem to be solved by the present invention is to provide a heat insulating paper cup that can be mass-produced at low cost and has excellent heat insulating properties.

[Means, actions, and effects for solving problems]

In order to solve the above technical problems, the present invention is mainly characterized in that a peripheral wall composed of an inner peripheral wall and an outer peripheral wall formed by double-turning a single blank is used. That is, according to the present invention, an insulating paper cup having the following configuration (first configuration) is proposed. That is, this heat-insulating paper cup has a peripheral wall composed of an inner peripheral wall and an outer peripheral wall formed by double-turning a single blank,
And a bottom wall assembled to the bottom of the peripheral wall. The inner peripheral wall is formed in an elliptic cylindrical shape, while the outer peripheral wall is formed in a substantially cylindrical shape. The inner and outer peripheral walls are adhered along at least one generatrix of the elliptic cylindrical inner peripheral wall in the major axis direction, both upper and lower edges of the inner and outer peripheral walls, and both lower end edges of the inner and outer peripheral walls and the bottom wall. The peripheral edges are integrally bonded. According to the above configuration, a large heat insulating space can be obtained between the inner and outer peripheral walls in the minor axis direction of the inner peripheral wall of the elliptic cylinder. The gap size of this heat insulating space can be adjusted by freely changing the size difference between the short axis and the long axis of the elliptic cylinder. Further, according to the above configuration, the inner and outer peripheral walls are not composed of two members but one blank, and the inner peripheral wall and the outer peripheral wall are composed by double-turning the blank. The number of points is small, which allows easy manufacturing and cost reduction. Further, according to the present invention, an insulating paper cup having the following configuration (second configuration) is provided. This thermal paper cup, like the one with the first configuration,
It comprises a peripheral wall composed of an inner peripheral wall and an outer peripheral wall formed by double-turning a single blank, and a bottom wall assembled to the bottom of the peripheral wall. A plurality of embossed protrusions are formed on one of the inner and outer peripheral walls to project toward the other and form a space therebetween. The outer ends of the inner and outer peripheral walls and the boundary between them are integrally bonded, and both end edges of the inner and outer peripheral walls, and both lower end edges of the inner and outer peripheral walls and the peripheral edge of the bottom wall are integrally formed. Glued to. In the above structure, when the embossed protrusion is formed on the outer peripheral wall, the embossed protrusion protrudes toward the inside of the cup. On the other hand, when the embossed protrusion is formed on the inner peripheral wall, the embossed protrusion protrudes toward the outside of the cup. This thermal paper cup, like the one with the first configuration,
Since it is characterized in that the peripheral wall composed of the inner peripheral wall and the outer peripheral wall formed by double-turning a single blank is used, the peripheral wall can be easily manufactured, and therefore the cost can be reduced. In the above structure, the heat insulating space is formed between the inner and outer peripheral walls by the interposition of the embossed protrusions. Then, the gap size of the heat insulating space can be easily adjusted only by adjusting the height of the protrusions, whereby the heat insulating efficiency can be changed. Furthermore, in this configuration, the embossed protrusion is not formed by an intermediate member different from the peripheral wall, but is formed by embossing, that is, unevenness processing on one of the inner and outer peripheral walls. There is an advantage that the score is small.

【Example】

Hereinafter, two embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, the first embodiment will be described with reference to FIGS. FIG. 1 shows the entire heat insulating paper cup 1. 2 is a cross-sectional view of the cup 1, FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2, and FIG. 4 is a view showing a blank of the peripheral wall, that is, a developed state. As shown in FIG. 4, the blank B has a shape in which two fan-shaped portions, that is, the inner peripheral wall 2 and the outer peripheral wall 3 are connected to each other. As is clear from the figure, the upper edge 2a of the inner peripheral wall 2 is the outer peripheral wall 3
Of the outer peripheral wall 3 while protruding outward from the upper edge 3a of the
Protrudes outward from the lower end edge 2b of the inner peripheral wall 2. Blank B is double-spun, as best shown in FIGS. That is, the blank B is started to rotate in a state where the outer end 2c of the inner peripheral wall 2 is positioned at the portion of the major axis O, and the blank B is wound twice and the outer end 3c of the outer peripheral wall 3 becomes the outer end 2c. Similarly, it is located at a position on the major axis O. As is clear from FIG. 2, the inner peripheral wall 2 is formed in an elliptic cylindrical shape so that the major axis O is the major axis. On the other hand, the outer peripheral wall 3 is formed in a substantially cylindrical shape. Therefore, a large heat insulating space S is formed between the inner peripheral wall 2 and the outer peripheral wall 3, particularly in the direction of the short axis O '. The gap dimension of the heat insulating space S is obtained by making the dimension of the minor axis relatively small with respect to the major axis.
It can be arbitrarily large. The inner and outer peripheral walls 2 and 3 are bonded to each other on the major axis O. That is, the elliptic cylindrical inner peripheral wall 2 is bonded along the generatrix in one of the major axis O directions. In FIG. 4, the bonding points of the blank B are indicated by mesh lines. That is, the bonding points are the outer end portion 2c of the inner peripheral wall 2, the outer end portion 3c of the outer peripheral wall 3, and the intermediate portion 5 between the inner and outer peripheral walls 2, 3. These three parts are bonded on the long axis O in FIG. Both upper and lower edges 2a and 3a of the inner and outer peripheral walls 2 and 3 and their lower edges 2
The b and 3b are integrally bonded as shown in FIG. That is, the upper edge 3a of the outer peripheral wall 3 is squeezed toward the inside of the cup, while the upper edge 2a of the inner peripheral wall 2 is wound from the inner side to the outer side so as to hold the upper edge 3a. On the other hand, the lower end portion 3b of the outer peripheral wall 3 is squeezed inward of the cup, and the peripheral edge 4a of the bottom wall 4 and the lower end portions 2 and 2b of the inner peripheral wall 2 are folded inwardly so as to be integrally bonded. . It is preferable that the members 2, 3 and 4 are bonded to each other by a heat-sealing method in manufacturing, and therefore the blank B has a structure in which a waterproof heat-sealing adhesive layer of polyethylene, for example, is laminated on both surfaces of the paper layer. Preferably. A second embodiment of the present invention is shown in FIGS. The parts having the same functions as those in the first embodiment are designated by the same reference numerals in the 10s, and detailed description thereof will be omitted. As shown in FIG. 8, the blank B ′ of the cup 11 according to the present embodiment has almost the same structure as the blank B according to the first embodiment, but the outer peripheral wall 13 has a protrusion, that is, a vertical length, by embossing. A large number of linear embossed projections 13d parallel to each other are formed. This embossed protrusion 13d is the seventh
As shown in the drawing, in the assembled state of the cup, it projects toward the inner peripheral wall 12. Therefore, the heat insulating space S is formed between the inner and outer peripheral walls 12, 13. In this embodiment, as shown in FIG. 6, both the inner and outer peripheral walls 12, 13 are formed in a substantially cylindrical shape. Also, the outer end 12c of the inner peripheral wall 12 and the outer end 13c of the outer peripheral wall 13
And their boundaries 15 are located on the axis O ″ and glued together.

[Brief description of drawings]

1 to 4 show a first embodiment of the present invention, FIGS. 5 to 8 show a second embodiment thereof, and FIG. 1 is a perspective view of an insulating paper cup,
2 and 3 are horizontal and vertical sectional views of the heat insulating paper cup of FIG. 1, FIG. 4 is a development view of a blank constituting the peripheral wall of the heat insulating paper cup of FIG. 1, and FIGS. 5, 6, 7, and 8 are It is a figure of the 2nd example corresponding to Drawings 1, 2, 3, and 4 of the 2nd example. 1 ... Cup, 2 ... Inner peripheral wall, 2a ... Upper edge, 2b ... Lower edge, 2c
... outer end portion, 3 ... peripheral wall, 3a ... upper edge portion, 3b ... lower edge portion, 3c ...
Outer end portion, 4 ... Bottom wall, 4a ... Perimeter edge, 5 ... Boundary portion, 11 ... Cup, 12 ... Inner peripheral wall, 12a ... Upper edge portion, 12b ... Lower edge portion, 12c ... End portion, 13 ... Outer peripheral wall, 13a ... upper edge portion, 13b ... lower edge portion, 13c ... end portion, 13d ... embossing protrusion, 14 ... bottom wall, 14a ... peripheral edge, 15 ... boundary portion, B, B '... blank, O ... axis line, long axis line, O ′… Short axis, S… Adiabatic space, O ″… Axis

Claims (2)

[Scope of utility model registration request] 1. A peripheral wall composed of an inner peripheral wall (2) and an outer peripheral wall (3) formed by double-turning one blank (B), and a bottom wall (4) assembled to the bottom of the peripheral wall. The inner peripheral wall (2) is formed into an elliptic cylindrical shape while the outer peripheral wall (3) is formed into a substantially cylindrical shape, and the inner peripheral wall (2) is formed into an elliptic cylindrical shape. The inner and outer peripheral walls (2, 3) are adhered along at least one generatrix in the major axis (O) direction of the both, and both upper end edges (2a, 3a) of the inner and outer peripheral walls (2, 3) are joined together, and
A heat insulating paper cup characterized in that both lower end edges (2b, 3b) of the inner and outer peripheral walls (2, 3) and a peripheral edge (4a) of the bottom wall (4) are integrally bonded. 2. A peripheral wall comprising an inner peripheral wall (12) and an outer peripheral wall (13) formed by double-turning one blank (B '),
A heat insulating paper cup comprising a bottom wall (14) assembled to the bottom of the peripheral wall, wherein one of the inner and outer peripheral walls (12, 13) projects toward the other and a space (S A plurality of embossed protrusions (13d) are formed, and the outer end portions (12c, 13c) of the inner and outer peripheral walls (12, 13) and the boundary portion (15) between them are integrally bonded. , Both end edges (12a, 13a) of the inner and outer peripheral walls (12, 13), and both lower end edges (12b, 13b) of the inner and outer peripheral walls (12, 13) as the peripheral edge (14a) of the bottom wall (14). Insulating paper cups characterized by being integrally bonded to each other.