JPS63281902A - Container and manufacture thereof - Google Patents

Abstract

PURPOSE:To prevent the bursting of a container body or removal of a cover from occurring when pressure becomes excessive in the interior of the container by forming all around the cover which is placed on at least one of both the ends of the container body a gas-releasable loose fit portion larger in retaining width than in the other portion. CONSTITUTION:A plurality of gas releasable loose fit portion 16 is formed on a close fit portion 15 provided all around a peripheral wall 9 of a body 2. The cover retaining width W1 of the loose fit portion 16 is larger than cover retaining width W0 of the other portion and the loose fit portion 16 is formed on a peripheral wall 7a of a concavity 7 of a cover 3 and provided with a cross-sectionally triangularly-shaped raised portion 17 facing toward the center of the concavity 7 and extending vertically. One of the two sides forming the vertex of the raised portion 17 is gently inclined blending with the close fit portion 15. When a container 1 is allowed to stand at normal temperatures, evolved carbonic acid gas escapes to the exterior between the peripheral wall 7a of the concavity 7 in the loose fit portion 16 and the body 2 and through a space 13 defined by the formation of a bent portion 12.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention comprises a cylindrical body made of a composite material mainly made of paper, and metal lids attached to both ends of the body, and is suitable for use in bread dough, kutsky, etc. This invention relates to a container suitable for holding dough for sweets such as cakes, and a method for manufacturing the same.

Conventional technology and its problems For example, containers for storing bread dough have conventionally consisted of a cylindrical body made of a composite material mainly made of paper, and metal lids attached to both ends of the body, with the lids fitting into the openings of the body. It was equipped with a recessed part, and the peripheral wall of the body was sandwiched between the peripheral wall of the recessed part of the lid and an outward folded wall that was connected to the peripheral wall of the recessed part of the lid. However, if bread dough or the like is left at room temperature, it will ferment and generate carbon dioxide gas, which creates a pressurized state inside the container, causing problems such as the shell bursting or the lid coming off from the shell.

An object of the present invention is to provide a container that solves the above problems and a method for manufacturing the same.

Means for Solving the Problems One container of the present invention includes a cylindrical body made of a composite material mainly made of paper, and a metal lid attached to both ends of the body, and the lid is inserted into the opening of the body. Equipped with a recessed part,
In a container in which the circumferential wall of the body is held all the way around by the circumferential wall of the concave part of the lid and the outer folded wall provided in series with the circumferential wall of the concave part of the lid, a clamping part that spans the entire circumference of the lid at at least one of both ends of the body. A degassing clamping loosening part is provided in which the clamping width is larger than the clamping width of other parts.

Another method for manufacturing a container according to the present invention is to provide a cylindrical body made of a composite material mainly made of paper, and a metal lid having a concave portion fitted into an opening of the body and a flange connected to the circumferential wall of the concave portion at both ends of the body. a chuck that is fitted into the recess of the lid;
A chuck for attaching at least one of the two metal lids to the body when manufacturing containers by attaching the container using a processing roll having an annular outward folding wall forming groove extending all around the circumference. A recess for forming a clamping loosening part is formed on either the outer peripheral surface or the peripheral surface of the outer folded wall forming groove of the processing roll, and first, the lid is fitted so that the recessed part fits into the opening of the can body. The lid is placed over the open end of the barrel and the chuck is fitted into the recess, and in this state, the barrel is rotated around its axis or the processing roll is rotated around the barrel while bringing the two closer together. The flange is bent toward the bottom wall of the concave part to form an outer folded wall over the entire circumference, and the outer folded wall and the circumferential wall of the concave part clamp the peripheral wall of the body to form a clamping part. A degassing clamping loosened part is formed in the clamping part of one of the lids in a part corresponding to the above-mentioned recess for forming the relaxed part, the clamping width being larger than the clamping width of the other part. It is something to do.

In the above, the cylindrical body has a core made of a spirally wound paper strip, and is spirally wound around the inner and outer circumferential surfaces of the core to cover the entire inner and outer surfaces, and the inner and outer circumferential surfaces of the core. Each consists of an inner lining and an outer lining that are glued together. The core is made of strong paper such as paperboard or paper tube base paper. The outer lining is made of, for example, aluminum foil and kraft paper laminated on the inner surface of the aluminum foil. The outer surface of the aluminum foil serves as a label by printing a pattern or text indicating the contents.

The lining is determined by taking into consideration the type of contents to be placed in the container using this body, cost, etc. For example, the lining may be made of aluminum foil and plain paper laminated on the outside of the body. , or one made of aluminum foil, a plastic film laminated to the inner surface of the aluminum foil, a plastic film laminated to the outer surface of the aluminum foil, and kraft paper laminated to the outer surface of the plastic film. is used. However, the core, outer lining, and lining are not limited to those mentioned above, and all those used as the core, outer lining, and lining of known cylindrical bodies for containers of this type can be used.

Such a cylindrical body is made by winding a strip-shaped lining, a core-constituting paper strip, and a diagonal strip in a spiral shape around a mandrel in the above order with adhesive interposed between them. Embodiments Manufactured by a known method of forming a cylindrical material and cutting it into a predetermined length.Embodiments of the present invention will now be described with reference to the drawings. Identical parts and members are denoted by the same reference numerals throughout the drawings.

A first embodiment of the container of the present invention is shown in FIGS. 1-4.

In Figures 1 to 4, the container (1) has a cylindrical body (2) made of a composite material mainly made of paper, a metal top cover (3) attached to both the upper and lower ends of the cylindrical body (2), and It consists of the same bottom cover (as shown).

The cylindrical body (2) includes a cylindrical core body (4) made of a spirally wound paperboard strip, and a cylindrical core body (4) that is spirally wound to cover the entire inner peripheral surface of the core body (4). An inner lining (5) adhered to the inner circumferential surface with an adhesive (as shown), and a lining (5) that is spirally wound around the outer circumferential surface of the core (4) to cover the entire outer circumferential surface and is attached to the outer circumferential surface of the core (4). It has a peripheral wall (9) consisting of a diagonal stay (6) bonded with an adhesive (as shown). The lining (5) consists of aluminum foil, a high-density polyethylene film laminated on the inner surface of the aluminum foil, a low-density polyethylene film laminated on the outer surface of the aluminum foil, and the outer surface of the low-density polyethylene film. The sides are made of laminated kraft paper and have gas barrier properties. The diagonal strut (B) is made of aluminum foil and kraft paper laminated on the inner surface of the aluminum foil.

The top cover (3) and the bottom cover are provided with a recess (7) that fits tightly into the opening of the barrel (2). The circumferential wall (7a) of the concave portion (7) is connected to the end of the concave portion (7) on the opening side (upper side in Figure 2) and the circumferential wall (7a) of the concave portion (7) as well as the body (2
) is provided with an outer folding wall (lO) sandwiching the circumferential wall (9). The recessed portion (
The portion sandwiched between the peripheral wall (7a) and the outer folding wall (10) of 7) is shown as (9a). An inner folded portion (11) is provided at the tip of the outer folded wall (lO). and,
The peripheral wall (9) is pressed between the peripheral wall (7a) of the recessed portion (7) and the inwardly folded portion (11). Inward folding part (
11) is provided with a plurality of bent portions (12) bent outward in a chevron shape at predetermined intervals in the circumferential direction, and these bent portions (12) and the portion to be clamped ( A space (13) exists between 9a) and 9a). The bent part (12) is
It is formed when fixing the lid (3) to the body (2).

A plurality of degassing clamping loosening parts (16) are provided at predetermined intervals in the circumferential direction on the clamping part (15) that clamps the peripheral wall (9) of the body (2) over the entire circumference. ing.

The clamping width (Wl) of the loosened clamping part (16) is larger than the clamping width (WO) of the other parts. This clamping loosening part (16) is provided on the peripheral wall (7a) of the recessed part (A) of the lid (3) with a protruding strip (17) having a triangular cross section and extending vertically and facing the center of the recessed part (7). ). One of both sides of the apex of the protruding strip (17) is gently sloped and continues to the clamping portion (15).

In manufacturing the container (1), first, as shown in FIG. A curl (19) with the tip facing the peripheral wall (7a) of the concave part (7)
A flange (18) having a diameter is provided. In addition, the apex (
3) and the peripheral wall (7a) of the concave portion (7) of the bottom cover,
Four protrusions (17) are formed at predetermined intervals in the circumferential direction, facing the center of the concave portion (7) and extending in the vertical direction.

Furthermore, the protrusions (17) can be tightly fitted at predetermined intervals in the circumferential direction on the circumferential surface of the chuck (20) that is fitted into the recess (7) when fixing the lid (3). Recess (21
) are formed into four. Then, place the trunk (2) on the vertically movable glue lid (as shown), and place one lid (3) so that its concave part (7) fits into the upper end opening of the trunk (2). Cover the top of the body (2). In this state, raise the lifter, insert the chuck (2o) into the recess (7) of the lid (3) so that the protrusion (17) fits into the recess (21),
Its bottom surface is brought into close contact with the bottom wall (7b) of the recessed portion (7), and its peripheral surface is brought into close contact with the peripheral wall (8) of the recessed portion (7).

As a chuck, a recess may be formed in a chuck used when attaching a lid to a can body by double seaming. Thereafter, while the chuck (20) and the lifter are pressurizing the cylinder (2) from above and below, the chuck (20) and the lifter are rotated to rotate the cylinder (2) around its axis, and the first processing roll ( 22) Bring it closer to the chuck. An annular outward folding wall forming groove (23) for preliminarily deforming the flange (18) of the lid (3) is provided on the circumferential surface of the first processing roll (22) over the entire circumference. Then, the flange (18) of the lid (3) is attached to the first processing roll (
22), the outer half of the flange (18) is bent downward, and its tip is folded back inward and upward, so that the tip comes into contact with the lower surface of the flange (18).

Subsequently, the second processing roll (24) is brought closer to the chuck (20). On the circumferential surface of the second processing roll (24), an outward folding wall (10) is formed by completely deforming the flange (18) that has been preliminarily deformed by the first processing roll (22).
Also, an outer folded wall forming groove (25) forming an inner folded portion (11) is provided over the entire circumference. By bringing the second processing roll (24) closer to the chuck (20), the road side half of the flange (18) of the lid (3) is
Finish processing is performed by compressing and filling between the groove (25) of the processing roll (24) and the outer peripheral surface of the chuck (20), and an outer folded wall (10) having an inner folded part (11) is formed.
), and the wall (10) and the peripheral wall (7a
) and firmly pinch the peripheral wall (9) of the body (2), and then press the clamping part (15
) to form. At this time, a clamping loosening part (1B) is formed in the clamping part (15). In addition, the curl (19) deforms in the inward folded portion (11), resulting in a bent portion (12).
is formed. After that, turn the body (2) upside down, put the bread dough inside the body (2), put another lid on the other end of the body (2), perform the same process as above, and put the lid on the body (2). ).

When such a container (1) is left at room temperature, the bread dough ferments, carbon dioxide gas is generated, and the inside becomes pressurized. The generated carbon dioxide gas is distributed between the circumferential wall (7a) of the concave portion (7) and the body (2) in the loosened clamping portion (1B), and the space (13) created by the formation of the bent portion (12). )
escape to the outside through

Furthermore, since the inside of the container (1) is under pressure, no outside air can enter.

FIG. 6 shows a second embodiment of the container of the invention. In FIG. 6, the degassing clamping loosening part (32) of the container (31) is connected to the peripheral wall (7a) of the concave part (A) of the lid (3).
) is formed by providing a large number of convex strips (33) with isosceles triangular cross sections extending vertically and facing the center of the concave portion (7) at predetermined intervals in the circumferential direction. Then, the portion where the protrusion (33) exists is the clamping loosening portion (32).
).

Such a container (31) has recesses (7) in both lids (3).
A protruding strip (33) is formed in advance on the peripheral wall (7a) of the chuck (20), and a large number of grooves extending vertically that match the protruding stripes (33) are formed at predetermined intervals in the circumferential direction on the outer peripheral surface of the chuck (20). I'll keep it. A third embodiment of the container of the present invention is shown in FIG. 7, which is otherwise manufactured in the same manner as the container of the first embodiment. In FIG. 7, the degassing clamping loosening part (42) of the container (41) is connected to the peripheral wall (7) of the concave part (7) of the lid (3).
a) is formed by providing four protrusions (43) with a flat trapezoidal cross section extending in the vertical direction and facing the center of the concave portion (7) at predetermined intervals in the circumferential direction. be. The portion where the protruding stripes (43) are present serves as a clamping loosening portion (42).

Such a container has a peripheral wall (
7a) is formed in advance with a protruding line (43), and four grooves extending vertically that match the protruding line (43) are formed on the outer peripheral surface of the chuck (20) at predetermined intervals in the circumferential direction. put. A fourth embodiment of the container of the present invention is shown in FIG. 8, which is otherwise manufactured in the same manner as the container of the first embodiment. In FIG. 8, the degassing clamping loosening part (52) of the container (51) is connected to the peripheral wall (7) of the concave part (7) of the lid (3).
a) is provided with two protrusions (53) having a flat trapezoidal cross section facing the center of the recess (7) and extending in the vertical direction at a predetermined interval in the circumferential direction, and adjacent protrusions ( 53
) is formed by providing a plurality of protrusions (54) having an isosceles triangular cross section and extending vertically and facing the center of the concave portion (7). In other words, the convex strip (53
) (54) is the clamping loosening part (52).

Such a container has a peripheral wall (
7a) are formed in advance with protrusions (53) and (54), and protrusions (58) are formed on the outer peripheral surface of the chuck (20).
Concave grooves of type 211 extending vertically and meeting (54) are formed at predetermined intervals in the circumferential direction. The other parts are manufactured in the same manner as the container of the first embodiment.

FIG. 9 shows a fourth embodiment of the container of the invention. In FIG. 9, the degassing clamping loosening part (62) of the container (61) is attached to the outer folded wall (lO) of the lid (3) at a predetermined interval in the circumferential direction, facing outward. Two protruding stripes (63) with a flat trapezoidal cross section extending in the vertical direction are provided, and a protruding strip (64) with a triangular cross section facing outward and extending in the vertical direction is provided between adjacent protruding stripes (63). It is formed by providing a plurality of. Then, the portion where the protrusions (63) and (64) are present is the clamping loosening portion (62).
).

Such a container has first and second processing rolls (22)
In the grooves (23) and (25) on the outer peripheral surface of (24), two types of concave grooves extending vertically and corresponding to the protrusions (63) and (64) are formed at predetermined intervals in the circumferential direction. . The other parts are manufactured in the same manner as the container of the first embodiment.

In the first to fifth embodiments described above, the clamping loosening portion is provided by forming a protruding strip on either the peripheral wall of the recessed portion of the lid or the outward folding wall, but there are protrusions on both. A clamping slack may be provided by forming a strip.

Furthermore, in the first to fifth embodiments described above, both the top cover and the bottom cover are provided with the clamping loosening part, but the clamping loosening part must be provided only on at least one of the lids. Bye.

Furthermore, in the first to fourth embodiments, the lid is pre-formed with a protrusion, but this is not necessarily necessary, and only the chuck is provided with a peg that matches the protrusion formed when attaching the lid. What is necessary is to form a recess for forming a loosening part.

Effects of the Invention According to one container of the present invention, a gas venting container is provided with a clamping width that is larger than the clamping width of the other parts of the lid at least one end of the body. Since a loosened clamping part is provided, if bread dough, etc. placed inside ferments and generates carbon dioxide gas, and the inside becomes pressurized, the dough passes through the loosened clamping part for degassing. gas escapes to the outside. Therefore, it is possible to prevent the shell from bursting or the lid from coming off as in the conventional case.

Further, according to another method of manufacturing a container of the present invention,
A recess for forming a clamping loosening part is formed on either the outer peripheral surface of the chuck that attaches at least one of the two metal lids to the body, or the peripheral surface of the outer folded wall forming groove of the processing roll. First, the lid is placed over the open end of the can body so that the concave part fits into the opening of the can body, and the chuck is fitted into the concave part, and in this state, the can body is rotated around its axis, or By rotating the processing roll around the shell and bringing the two closer together, the flange of the lid is bent toward the bottom wall of the recess to form an outer folded wall over the entire circumference, and the outer folded wall and the circumferential wall of the recess are combined. A clamping part is formed by clamping the peripheral wall of the body, and a clamping part with a clamping width other than that of the clamping part of at least one of the lids is attached to the part corresponding to the recess for forming the relaxed part. Since the container is characterized by forming a degassing clamping and loosening part that is larger than the width, it is possible to easily manufacture a container that can prevent the shell from bursting or the lid from coming off.

[Brief explanation of drawings]

1 to 4 show a first embodiment of the container of the present invention, FIG. 1 is a plan view, FIG. 2 is an enlarged sectional view taken along the line ■-■ in FIG. 1, and FIG. 1, and FIG. 4 is an enlarged sectional view taken along line 2--IV in FIG. 3. FIG. 5 is a partially omitted and partially cutaway perspective view showing a method of manufacturing the container shown in FIGS. 1 to 4, and FIGS. 6 to 9 are other embodiments of the container of the present invention. 6 is a plan view of the second embodiment, FIG. 7 is a plan view of the third embodiment, FIG. 8 is a plan view of the fourth embodiment, and FIG. 9 is a plan view of the fifth embodiment. FIG. 3 is a plan view of an example. (1) (31) (41) (51) (61)...
Container, (2)...body, (3)...lid, (7)...
Concave portion, (7a)...peripheral wall, (7b)...bottom wall, (
lO)...Outward folding wall, (15)...Spanning part, (
IB) (32) (42) (52) (82)...
Relaxed clamping part for degassing, (20)...Chuck, (2
2) (24)...Processing roll, (23) (25)
...Outward folding wall forming groove, (WO> (Wl)...
- Clamping width. Above Figure 4 Figure 5 Figure 7 Figure 8 Figure 9

Claims (2)

[Claims] (1) It consists of a cylindrical body made of a composite material mainly made of paper and a metal lid attached to both ends of the body, and the lid has a recessed part fitted into the opening of the body. In a container whose circumferential wall is sandwiched around the entire circumference by the circumferential wall of the recessed part of the lid and the outer folded wall provided in series with the circumferential wall, a clamping part extending over the entire circumference of the lid at at least one end of both ends of the body, A container provided with a loosened clamping part for degassing, the clamping width of which is larger than the clamping width of other parts. (2) At both ends of a cylindrical body made of a composite material mainly made of paper, a metal lid is fitted into the concave part of the lid, which has a concave part that is fitted into the opening of the body and a flange connected to the circumferential wall of the concave part. At least one of the two metal lids is attached to the body by attaching the container using a chuck and a processing roll having an annular outward folding wall forming groove extending all the way around the circumference. A recess for forming a clamping loosening part is formed on either the outer circumferential surface of the chuck to be attached or the circumferential surface of the outer folded wall forming groove of the processing roll. By placing the chuck over the open end of the cylinder so as to fit the chuck into the recess, and rotating the cylinder around its axis in this state, or by rotating the processing roll around the cylinder and bringing the two closer together. The flange of the lid is bent toward the bottom wall of the concave part to form an outer folded wall over the entire circumference, and the circumferential wall of the body is clamped between this outer folded wall and the circumferential wall of the concave part to form a clamping part. , forming a degassing clamping loosened part having a clamping width larger than the clamping width of the other part in a part of the clamping part of at least one of the lids corresponding to the above-mentioned loosened part forming recess; A method for manufacturing a container characterized by: