JP3291262B2 - Insulated container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating container comprising a container body and a sleeve mounted on the outer periphery of the container body.

[0002]

2. Description of the Related Art As a heat-insulating container suitable for containing hot water or the like, for example, the one described in Japanese Utility Model Laid-Open No. 4-45212 is known. This container includes a paper cup main body as a container main body and a sleeve bonded to the outer periphery of the paper cup main body, and provides a heat insulating property to the container by providing a space between the paper cup main body and the sleeve. .

[0003]

In the above-described heat-insulating container, it is necessary to secure a sufficient space between the paper cup body and the sleeve in order to secure a predetermined heat-insulating property. On the other hand, when holding the container by hand, the entire container is supported by gripping the sleeve, so that the paper cup body and the sleeve must be bonded with sufficient strength. As described above, in order to secure a sufficient gap between the paper cup body and the sleeve and bond the two with sufficient strength, it is necessary to determine the relative shape and size of the paper cup body and the sleeve. Need to be considered. In addition, these relationships must satisfy the conditions for facilitating the process of assembling the two and preventing the occurrence of defects.

[0004] It is an object of the present invention to provide an insulated container that can bond a container body and a sleeve with sufficient strength and is excellent in assembling suitability of both.

[0005]

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[0032]

Means for Solving the Problems The invention described in claim 1 has a side wall (2a) and bottom disposed at a lower end of the side wall (2a) and (2b), the upper end of the side wall (2a) Is an outwardly curled portion (2) curled toward the outside of the container.
c) formed of a container body (2) and a sheet-like sleeve material, and a side wall (2) of the container body (2) is provided on the upper end side.
a) a sleeve (3) formed with an adhesive portion (BD) to be adhered to (a) and arranged while securing a space outside the side wall (2a); CL)
The side wall (2a) is formed such that a portion facing the bonding portion (BD) is inclined inwardly of the container with respect to an extension line (S) of a portion below this portion. Above, the above object is achieved (see FIG. 7).
(A)).

According to the present invention, the side wall (2a) is formed so that the portion facing the bonding portion (BD) is inclined inward of the container with respect to the extension line (S) of the portion below this portion. So that the side wall (2
a) and the sleeve (3) are in close contact with each other, so that the adhesive strength can be improved. Also, since the side wall (2a) of the portion of the bonding portion (BD) is inclined, the side wall (2
The sleeve (3) does not need to be curved to make close contact with a), and does not affect the appearance of the container.

The invention according to claim 2 has a side wall (2a) and a bottom (2b) arranged at the lower end of the side wall (2a), and the upper end of the side wall (2a) faces the outside of the container. A container body (2) having an outwardly curled portion (2c) formed by curling, and a sheet-like sleeve material, and the upper end side is adhered to a side wall (2a) of the container body (2). And a sleeve (3) disposed on the outside of the side wall (2a) while securing a space, and a center (CL) of the container body (2) in a plane including the center line (CL). With respect to the cross section, the above-mentioned object is achieved by the side wall (2a) being formed so that a portion facing the bonding portion (BD) is curved along the sleeve material (FIG. 7A). In this case, the portion below the portion facing the bonding portion (BD) does not necessarily have to be formed linearly.

According to the present invention, since the side wall (2a) is formed so that the portion facing the bonding portion (BD) is curved along the sleeve material, the side wall (2a) is formed at the bonding portion (BD). 2a) and the sleeve (3) are in close contact with each other, so that the adhesive strength can be improved. Further, since the side wall (2a) is curved, the sleeve (3) does not need to be curved in order to make close contact with the side wall (2a), and the appearance of the container is not affected.

The invention according to claim 3 has a side wall (2a) and a bottom (2b) arranged at the lower end side of the side wall (2a), and the upper end side of the side wall (2a) faces the outside of the container. A container body (2) having an outwardly curled portion (2c) formed by curling, and a sheet-like sleeve material, and the upper end side is adhered to a side wall (2a) of the container body (2). And a sleeve (3) disposed on the outside of the side wall (2a) while securing a space, and a center (CL) of the container body (2) in a plane including the center line (CL). Regarding the cross section, the sleeve (3) has a bonding portion (BD) with a side wall (2).
By being formed to be curved along a),
The above object is achieved (FIG. 7B).

According to the present invention, since the bonding portion (BD) is formed to be curved along the side wall (2a), the side wall (2a) is formed at the bonding portion (BD). And the sleeve (3) closely adhere to each other, so that the adhesive strength can be improved.

[0038]

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[0043]

[0044]

[0045]

Note that, in order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are appended in parentheses, but the present invention is not limited to the illustrated embodiment.

[0047]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a heat insulating container according to the present invention will be described below with reference to FIGS.

FIG. 1 shows a paper cup as an insulated container according to the present embodiment, and FIG. 2 schematically shows a procedure for manufacturing the paper cup.

As shown in FIG. 1, the paper cup 1 is constituted by combining a cup body 2 as a container body and a sleeve 3 covering the outer periphery thereof. The cup body 2 is formed in a substantially truncated cone shape having a side wall 2a and a bottom 2b. The bottom portion 2b is drawn so that its outer peripheral end is bent downward in FIG. 1, whereby the bottom portion 2b is formed in a substantially "U" shape whose cross-sectional shape is opened downward in FIG. The bent portion of the outer peripheral portion of the bottom portion 2b is adhered so that the side wall 2a wraps around from the outside, and the thread end 2f of the cup body 2 is formed.

The mouth of the cup body 2 is provided with a curled portion 2c curled outward, and a side wall 2a of the cup body 2 is provided with a circumferential Peter wire 2d swelling inward and an outward curled portion. Inflatable circumferential ribs 2e are provided respectively. Peter line 2d is cup body 2
The rib 2e is for indicating the appropriate position of the injectable material (for example, hot water) into the cup body 2, and the rib 2e is for reinforcing the cup body 2. The rib 2e is formed somewhat larger than the Peter line 2d. Peter line 2d and rib 2e are sleeve 3
The respective projecting amounts are determined so as not to come into contact with the inner surface of the.

The Peter wire 2d may project outside the cup body 2, and the rib 2e may project inside the cup body 2.

As a material of the cup body 2, for example, a grammage of 15
A paper of 0 to 400 g / m ² is used, and at least the inner surface thereof is covered with a coating layer (for example, a polyethylene layer) for improving heat resistance and water resistance.

The sleeve 3 is provided to enhance the heat insulation of the paper cup 1. As shown in FIG. 1, a curled portion 3 a curled inward is formed at the lower end of the sleeve 3. The upper end 3b of the sleeve 3 is the side wall 2 of the cup body 2.
a, and the curl portion 3a is
Opposing the side surface of the thread end 2f. The curl portion 3a functions as a spacer, and the sleeve 3 is separated from the cup body 2, whereby the side wall 2a of the cup body 2 and the sleeve 3
A space functioning as a heat insulating layer is secured between the two. The material of the sleeve 3 includes, for example, a basis weight of 150 to 400 g / m ^2.
Paper is used. In addition, since the sleeve 3 does not particularly come into contact with hot water or water, a coating layer such as the cup body 2 may be omitted.

As shown in FIG. 2, after bonding the side wall 2a and the bottom 2b, the cup body 2 is formed by forming the Peter wire 2d and the rib 2e. In addition, fan-shaped blank 3
The both ends 3c, 3c are bonded together, and an inward curl portion 3a is formed at the lower end to form the sleeve 3. Then, an adhesive is spray-coated on a predetermined bonding area (hatched area in FIG. 2) BD set below the curled portion 2c of the cup body 2, the cup body 2 and the sleeve 3 are combined, and the upper end of the sleeve 3 3b and side wall 2 of cup body 2
are bonded to each other to form the paper cup 1 (see FIG. 7 for the bonding area BD).

When the Peter wire 2d swells outward in the radial direction of the cup body 2, the bonding area BD is set so as not to extend over the Peter wire 2d.

FIG. 3 is an enlarged sectional view showing the vicinity of the curled portion 3a of the sleeve 3, and FIGS. 4 and 5 are sectional views for explaining the shape of the curled portion 3a. 3 to 5 show vertical cross sections when the center line CL of the cup body 2 is set in the vertical direction.

As shown in FIG. 3, the lower end of the thread end 2f, ie, the lower end of the cup body 2, protrudes below the lower end of the curled portion 3a, ie, the lower end of the sleeve 3. Therefore, when the paper cup 1 is placed on a table or the like, the cup body 2 containing the contents comes into direct contact with the table or the like, and the thread end 2f of the cup body 2 is strong and the lower end has flatness. Since it is relatively good, the paper cup 1 is stable. Note that “A” in FIG. 3 indicates this protrusion amount.

On the other hand, if the lower end of the curl portion 3a is configured to contact a table or the like, the flatness of the lower end of the curl portion 3a is inferior to the thread end 2f, and the cup body 2 Since the sleeve 3 is supported via the sleeve 3 and the sleeve 3 is deformed, the stability of the paper cup 1 is deteriorated.

If the lower end of the thread end 2f is configured to protrude from the lower end of the curled portion 3a by a projection amount of 0.01 to 5 mm, the protrusion of the cup body 2 does not matter visually and is sure. The thread end 2f abuts on a table or the like, and the paper cup 1 is stabilized.

The configuration in which the lower end of the container body is projected below the lower end of the sleeve is applicable to a case where the sleeve does not have an inward curl portion or a case where the cup body has no thread end formed thereon. You can also.

As shown in FIG. 3, the outer peripheral position of the lower end of the thread end 2f is located at the center line C of the cup body 2 in the curl portion 3a.
Center line CL of the cup body 2 more than the part closest to L
Located closer. "B" in FIG. 3 indicates the outer peripheral position of the lower end of the thread end 2f and the center line C of the cup body 2 in the curl portion 3a.
4 shows the amount of displacement of the cup body 2 in the radial direction with respect to the part closest to L. This displacement amount is 0.01 to 1 m
By setting it to the range of m, deformation of the paper cup 1 can be suppressed while ensuring smoothness of assembly.
Also, the center line CL of the cup body 2 in the curled portion 3a
A gap is formed between the part closest to the side and the side surface of the yarn tail 2f facing this part. By setting this gap (“D” in FIG. 3) in the range of 0.01 to 1 mm, deformation of the paper cup 1 can be suppressed while ensuring smooth assembly.

In FIGS. 3 and 4, "X" indicates the direction of the vertical axis, and "Y" indicates the direction indicated by the leading end of the paper wound around the curl portion 3a. As shown in FIG.
In the curl portion 3a, the leading end of the paper is entangled until the leading end of the paper is rotated clockwise beyond the vertical upward direction. Thereby, when assembling the cup body 2 and the sleeve 3, the thread end 2f is less likely to be caught on the leading end of the paper of the curled portion 3a, and the two can be assembled smoothly.

On the other hand, in FIG. 4A, the leading end of the paper is not entangled until the leading end of the paper reaches the vertical upward direction. As described above, in a case where the tip of the paper does not reach vertically upward and the curl portion 3a is opened upward, when the cup body 2 and the sleeve 3 are assembled, the curl portion 3a is attached to the curl portion 3a. It is not preferable because the thread end 2f is easily caught and the curl portion 3a is easily pushed open.

FIG. 4B shows an example of a state in which the leading end of the paper is wound up until it rotates beyond the vertical upward direction, so that the thread end 2f is less likely to be caught on the curled portion 3a. FIG. 3 shows a state in which the leading end of the paper of the curled portion 3a is further wrapped in the clockwise direction from the state of FIG. 4B, and the thread end 2f is hard to be caught.

In FIG. 4 (c), the tip of the paper in the curled portion 3a does not reach the vertical upward direction, but the curled portion 3a is closer to the center line CL of the cup body 2 than to the portion closest to the center line CL. The leading edge of the paper is located outward of the container. Note that “P” in FIG. 4C indicates a vertical line in contact with the inner peripheral surface of the curled portion 3a, that is, the horizontal position where the curled portion 3a is closest to the center line CL of the cup body 2.

In the case where the requirement that the leading end of the paper is located in the outward direction of the container than the portion of the curl portion 3a closest to the center line CL of the cup body 2 is similarly used. Thread end 2f is less likely to be caught on curled portion 3a. FIG. 3 and FIG. 4B both show a case where the above requirements are satisfied. On the other hand, FIG.
In (a), the leading end of the paper is closest to the center line CL of the cup body 2 and does not satisfy the above requirements.
In this case, the thread end 2f is easily caught on the leading end of the paper of the curled portion 3a.

Further, the gap between the leading end of the paper wound around the curl portion 3a and the inner wall surface of the sleeve 3 is set to 1 mm or less. 3a. By setting this gap smaller than the thickness of the thread end 2f, the risk that the thread end 2f enters the inside of the curl portion 3a from this gap and pushes the curl portion 3a open during assembly is significantly reduced. FIG. 5 (a), FIG. 5 (b)
5 (c) shows the case where the gaps are C1, C2 and C3 (C1>C2> C3), respectively, and FIG.
C2 in (b) corresponds to the thickness of the thread end 2f. Also,
FIG. 5C corresponds to the curled portion 3a in FIG.

FIG. 6A is a sectional view showing the vicinity of the thread end 2f. As shown in FIG. 6A, the thread end 2f is
It is folded down toward the inside of the container so as to be positioned on the inside of the container with respect to an extension line R obtained by extending the outer wall surface of the side wall 2a above. By inclining the thread end 2f toward the inside of the container in this manner, the thread end 2f is less likely to be caught on the curl portion 3a when the cup body 2 and the sleeve 3 are assembled.

Further, as shown in FIG.
2 g of burr protrudes toward the inside of the container at the tip of.
In the manufacturing process of the cup body 2, the curl portion 2 c is formed after forming the thread end 2 f. In the curl portion 2 c forming process, the thread end 2 f is strongly pressed against the contact member in order to fix the cup body 2. Burrs are inevitably formed at the tip of the buttocks 2f. However, as shown in FIG. 6A, by forming the burr so as to protrude toward the inside of the container so as not to generate the burr protruding outside the container, the thread end 2f is further less likely to be caught on the curl portion 3a.

In FIG. 6B, the thread tail extends along the extension R of the side wall, and the burr 2h projects outside the container. This shape corresponds to a normal paper cup, but when the cup body 2 is formed in such a shape, the burr 2h protrudes to the outside of the extension line R, so that the thread end is caught by the curl portion 3a. It will be easier.

In order to form the thread end 2f so as to fall down toward the inside of the container, when the bottom 2b and the side wall 2a are overlapped to form the thread end 2f, the thread end 2f is pushed down inside the container. The bottom 2b and the side wall 2a may be bonded to each other while applying pressure. For example, in the case of bonding with a knurled roll, the receiving surface of the receiving member that receives the thread tail 2f from the outside is inclined toward the inside of the container, and the side surface of the rotating body that presses the thread tail 2f from the inside is tapered according to the receiving member. It can be a face. If the yarn end 2f is tilted inward in advance, the subsequent steps, for example, the curl portion 2
Since the burr generated at the tip of the yarn end 2f in the step of forming c protrudes inward, the yarn end 2f having a shape as shown in FIG. 6A can be finally formed.

Further, after the thread tail is formed and before the curled portion 2c is formed, pressure is applied to the thread tail to process the thread tail into a shape as shown in FIG. When forming the portion 2c, the cup body 2 may be fixed by using a contact member shaped so as to squeeze the tip of the thread end inward. In the latter case, the entire yarn end or the end of the yarn end can be fallen inward simultaneously with the formation of the curled portion 2c.

FIG. 7A shows the center line CL of the cup body 2.
FIG. 4 is a vertical cross-sectional view showing a bonding portion between a cup body 2 and a sleeve 3 when the device is placed in a vertical direction. FIG.
As shown in (a), the side wall 2a is formed in a curved shape, and a portion facing the bonding area BD is a container with respect to an extension (straight line "S" in FIG. 7) of a portion below this portion. It is inclined inward. Thereby, the bonding area BD
In this case, the direction of the side wall 2a and the direction of the sleeve 3 coincide with each other, and the two adhere well, so that sufficient adhesive strength can be obtained. Note that the straight line “T” in FIG. 7 indicates the direction of the side wall 2a in the bonding range BD. Instead of curving the side wall 2a, the sleeve 3 may be curved and brought into close contact with the side wall 2a, as shown in the vertical sectional view of FIG.

In FIG. 7A, a straight line “U” represents a horizontal plane passing through the lower end of the curled portion 2c, and a straight line “V” represents an adhesion area BD.
, And a straight line “W” indicates a horizontal plane passing through the lower end of the bonding area BD. Here, the bonding area BD
, That is, the distance between the straight line “V” and the straight line “W” in FIG. 7A is set to 3 mm or more, so that a sufficient adhesive strength is obtained. Also, the distance between the upper end of the bonding area BD and the lower end of the curled portion 2c,
That is, the distance between the straight line “V” and the straight line “U” in FIG. 7A is set to 1 mm or more, so that the adhesive is prevented from adhering to the curled portion 2c which is a portion where the mouth is put. Further, the upper end of the bonding range BD indicated by the straight line “V” is located lower than the upper end 3c of the sleeve. Thereby, there is no possibility that the adhesive protrudes from the upper end 3c side of the sleeve 3.

When the paper cup 1 is manufactured according to the process shown in FIG. 2, the outer diameter of the cup body 2 just below the curled portion 2c (FIG. 1)
In this case, the cup body 2 and the sleeve 3 are formed in advance so that the difference between the inner diameter of the sleeve 3 and the inner diameter of the sleeve 3 at that position is in the range of −1.0 to +0.5 mm. The two are glued together. By adopting such a dimensional relationship, a sufficient adhesive force in the adhesive range BD is ensured, and there is no possibility that wrinkles are generated on the side wall 2a of the cup body 2.

As shown in FIG. 8, the curl portion 3a of the sleeve 3 may be configured to face the side wall 2a above the thread tail 2f. In this case, by setting the gap (D ') between the curled portion 3a and the side wall 2a in the range of 0.01 to 1 mm, the deformation of the paper cup 1 can be suppressed and wrinkles can be generated on the side wall 2a. Absent.

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[0086]

[0087]

[0088]

[0089]

[0090]

[0091]

Effects of the Invention According to the invention described in claim 1, as a portion facing the bonding portion tilts the container inwardly with respect to the extension line of the sites below the site, since the side wall is formed In addition, the side wall and the sleeve are in close contact with each other at the bonding portion, and thus the bonding strength can be improved. Also,
Since the side wall of the bonding portion is inclined, the sleeve does not need to be curved to make close contact with the side wall, and the appearance of the container is not affected.

According to the second aspect of the present invention, the side wall is
Since the portion facing the bonding portion is formed to be curved along the sleeve material, the side wall and the sleeve are in close contact with each other at the bonding portion, and thus the bonding strength can be improved. In addition, since the side wall is curved, the sleeve does not need to be curved to make close contact with the side wall, and does not affect the appearance of the container.

According to the third aspect of the present invention, the sleeve is formed so that the bonding portion is curved along the side wall, so that the side wall and the sleeve are in close contact with each other at the bonding portion, and thus the bonding is performed. Strength can be improved.

[0094]

[0095]

[0096]

[0097]

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a heat insulating container according to the present invention.

FIG. 2 is a view showing a manufacturing process of the heat insulating container of FIG. 1;

FIG. 3 is an enlarged cross-sectional view showing the vicinity of an inward curl of a sleeve.

4A and 4B are diagrams showing the shape of an inward curl of a sleeve, in which FIG. 4A shows a state in which the leading end of the paper is not rolled up vertically, and FIG. FIG. 3C is a diagram illustrating a state where the paper is further entangled, and FIG.

5A and 5B are diagrams illustrating the shape of an inward curl of a sleeve, in which FIG. 5A illustrates a case where a gap between the leading end of the paper and the inner wall surface of the sleeve is C1, and FIG. The case where the gap between the inner wall surface is C2 (> C1),
(C) shows that the gap between the leading edge of the paper and the inner wall surface of the sleeve is C.
FIG. 3 is a diagram illustrating a case of 3 (> C2).

6A and 6B are enlarged cross-sectional views showing the vicinity of the thread end; FIG. 6A is a view showing the vicinity of the thread end of the heat insulating container of FIG. 1; FIG. 4 is a view showing a state in which burrs protrude toward the outside of the container.

FIGS. 7A and 7B are enlarged cross-sectional views showing the vicinity of an adhesive portion between a cup body and a sleeve, wherein FIG. 7A is a diagram showing a case where the cup body is curved, and FIG. 7B is a diagram showing a case where the sleeve is curved.

FIG. 8 is a sectional view showing a part of another embodiment in which the lower end of the sleeve is located above the thread tail;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper cup 2 Cup main body 2a Side wall 2b Bottom part 2c Curl part (outward curl part) 2f Thread end 3 Sleeve 3a Curl part (inward curl part) BD adhesion range

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoichi Mochizuki 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. (72) Takanori Yamashita 1-1-1, Ichigaga-cho, Shinjuku-ku, Tokyo No. 1 Dai Nippon Printing Co., Ltd. (72) Inventor Kenichi Endo 1-1-1, Ichigaya Kagacho, Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd. (56) References JP-A-4-201840 (JP, A JP-A-10-33827 (JP, A) JP-A 63-62376 (JP, U) JP-A 4-45212 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B31B 49/00 B65D 3/06 B65D 3/22 B65D 3/30 B65D 81/34 B65D 81/38

Claims (3)

(57) [Claims] A container body having a side wall and a bottom portion disposed at a lower end side of the side wall, and an outer curl portion curled toward the outside of the container at an upper end side of the side wall; A sleeve formed of a sheet-shaped sleeve material, an adhesive portion adhered to the side wall of the container main body is formed on an upper end side, and a sleeve is arranged while securing a space outside the side wall; Regarding a cross section in a plane including the center line of the container body, the side wall is formed such that a portion facing the adhesive portion is inclined inwardly of the container with respect to an extension of a portion below the portion. A heat insulating container characterized by the above-mentioned. 2. A container body having a side wall and a bottom disposed at a lower end side of the side wall, and an outer curl portion formed by curling toward the outside of the container at an upper end side of the side wall; A sleeve formed of a sheet-shaped sleeve material, an adhesive portion adhered to the side wall of the container main body is formed on an upper end side, and a sleeve is arranged while securing a space outside the side wall; With respect to a cross section in a plane including a center line of the container main body, the side wall is formed so that a portion facing the adhesive portion is curved along the sleeve material. 3. A container body having a side wall and a bottom portion disposed at a lower end side of the side wall, and an outer curl portion formed by curling toward the outside of the container at an upper end side of the side wall; A sleeve formed of a sheet-shaped sleeve material, an adhesive portion adhered to the side wall of the container main body is formed on an upper end side, and a sleeve is arranged while securing a space outside the side wall; With respect to a cross section in a plane including a center line of the container main body, the heat insulating container is characterized in that the sleeve is formed so that the adhesive portion is curved along the side wall.