JPH0825557B2 - Manufacturing method of paper cylinder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a cylindrical paper container for storing various chemicals, pharmaceuticals, foods and the like.

[0002]

2. Description of the Related Art A paper container formed by laminating cardboard such as a liner or kraft paper is conventionally made of a metal material for a bottom plate or a reinforcing ring fitted to the outer periphery of the end of the container body for strength reinforcement. (See Jitsuko Sho 37-37285).

However, the use of a metal material in a part of a paper container not only hinders the recycling of the container,
The incineration has the inconvenience of having to remove metal objects, so recently it has been obliged to prohibit the use of metal objects in this kind of container and to make the entire container, including the lid, from paper only. .

[0004] In order to form the container only in cardboard, it is necessary to provide integral bottom plate in the bottom of the cylinder body that forms a cylindrical body, in which case, the cross section of the cylinder body, for example the actual fairness 3 As shown in FIGS. 7 and 8 of the publication, a shape similar to a shamisen body in which each side surface is curved so as to project outward with respect to the corners of the four corners as shown in Japanese Patent Publication No. 27940. As described above, it is proposed that the corners are first bent inward, then the upper ends of the side faces are bent inward at right angles, and the bottom plates are adhered to the inner and outer surfaces respectively to form the bottom.

On the other hand, when the body of the body is cylindrical, the end portion of the body of the body cannot be bent as it is to form a flange portion, and the bottom plate cannot be attached to the flange portion. As shown in FIG. 12, after forming V-shaped notches a to a having a predetermined depth from the rising end of the body A in the entire circumference at appropriate intervals to form folding pieces b to b, It is necessary to fold these folding pieces b to b into the inside of the body A at a substantially right angle, and then bond the paper inner bottom plate B and the outer decorative paper C from inside to outside with an adhesive. This also applies to the attachment of the top plate to the lid.

[0006]

However, the above-described method for manufacturing a cylindrical container has a drawback that it takes time and labor to process the cuts a to a, and the strength may be impaired by cutting the paper, but it may be said that it is partial. This results in waste of resources.

Therefore, an object of the present invention is to provide a method for manufacturing a cylindrical paper container which is easy to process and does not waste paper.

[0008]

SUMMARY OF THE INVENTION That is , the claims of the present invention .
According to the first invention (hereinafter, referred to as a first invention), one end of the circular cylindrical barrel the body that is produced by the paper in a state where the clamped from inside and outside by a pair of gear rolls, the rotation of the gear rolls a step of attaching a wavy wrinkles in the entire circumferential direction of the cylinder the body by the steps of bending the ends of the cylinder the body該皺is attached inwardly, the bottom plate from the inner side to the bent end portion of the trunk body a step of contact wear, characterized by comprising the step of bonding the decorative sheet from the outside to the bottom plate portion including a bent end portion of the cylinder body.

The invention according to claim 2 (hereinafter referred to as the second
(Invention) is a state in which one end of a cylindrical lid body made of paper is sandwiched by a pair of gear rolls from inside and outside, and wavy wrinkles are formed in the entire circumferential direction of the lid body by rotation of these gear rolls. The step of attaching, the step of bending the end of the wrinkled lid inward, the step of adhering the top plate from the inside to the bent end of the lid, and the folding end of the lid And a step of adhering the decorative paper from the outside to the top plate portion including the outer surface.

[0010]

According to the first and second inventions described above, Izu
Also in this case, the wavy wrinkles can be formed on the entire circumference of the end portion by rotating the body body or the lid body once by rotating the pair of gear rolls, and the end portion can be easily bent.

[0011]

Embodiments of the present invention will now be described with reference to the drawings.

The present invention is to manufacture a cylindrical container 1 as shown in FIGS. 1 and 2 by using a cardboard such as a liner or kraft paper. By laminating the cardboard, a long cylinder not shown is manufactured. Then, cut it to a predetermined length and
A body 2 and a lid 3 as shown in FIG. In that case, the inner diameter of the lid 3 is set to a size such that the lid 3 fits into the mouth portion 2a of the body 2. Therefore, the body 2 and the lid 3 are separately cut out from the long cylinder having different outer diameters.

Next, the body 2 is fitted on a positioning member 5 provided on the upper surface of the set table 4 on the set table 4 shown in FIGS. 4 and 5, and the set table 4 is cut. A pair of gear rolls 7a, 7b provided in the notch portion 6
The end portion 2b which is the bottom portion of the body 2 is sandwiched between the inside and the outside, and these gear rolls 7a and 7b are rotated in opposite directions by driving means such as a motor (not shown). As a result, the body 2 rotates in the direction of the arrow X, and the wavy wrinkles 8 are attached to the end 2b by the gear rolls 7a and 7b. Incidentally, by the wrinkles with said gear roll 7a to squeeze slightly inward so tends bent end portion 2b, by placing 7b, stage boundary between wrinkled portion and which has not been partially The part 9 is to be formed. Similarly, a similar corrugation process is applied to the lid body 3.

Next, the wrinkled end portion 2b as shown in FIG.
As upward lowers the-ring 10 bent as shown in FIG. 7 at setting the trunk body 2 under the-ring 10 and folding the molding plate 11, it is formed on the inner peripheral surface of the bent-ring 10 The end portion 2b wrinkled by the tapered surface 10a is bent around the stepped portion 9 and the molding plate 11 is lowered as shown in FIG. 8 to keep the bent end portion 2b at a substantially right angle. After that, the bottom plate 12 made of paper is pressed from the lower side by the pressing member 13 to bend the end 2
Apply to b and bond.

Then, as shown in FIG. 9, the decorative paper 14 is pressed from the outside to the bottom plate 12 and the bent end portion 2b by the pressing member 15 from the outside to be adhered,
A paper-made reinforcing ring 16 (see FIG. 1) is also fitted and adhered to the mouth 2a at a position lower than the tip by a predetermined length. That is, the reinforcing ring 16 is provided at a position where the lid body 3 comes into contact when the lid body 3 is fitted on the body body 2.

Similarly, in the lid 3, the wrinkled end 3a is bent and the top plate 17 and the decorative paper 18 are bonded to the bent end 3a (see FIG. 2). .

As a result, the paper cylindrical container 1 shown in FIGS. 1 and 2 is obtained. In the container 1 obtained by the above manufacturing method, the above-mentioned gear roll 7
Since the wrinkles that easily bend the end portions 2b and 3a can be formed by simply rotating the body 2 and the lid 3 once with a and 7b, the processing is facilitated, and the paper cutting processing is eliminated. You can eliminate the waste of paper.

The container 1 shown in FIGS. 1 and 2 has a structure in which the lid 3 is fitted until it hits the reinforcing ring 16.
As shown in FIG. 10, the mouth 22a of the body 22 may be wrinkled and drawn by the gear rolls 7a and 7b, and the lid 23 may be fitted into the narrowed mouth 22a. According to this, since the outer diameters of the body 22 and the lid 23 can be made the same, both of the long cylinders 22 and
Can be cut out.

[0019]

As evidenced by the foregoing description, according to the present invention, the first invention and according to the second invention, an end portion only both rotates once the cylinder body or the cover member by the rotation of the pair of gears roll of the present invention A wrinkle can be attached to the entire circumference, and the end can be easily bent. Therefore, fold the edge and attach it to the bottom plate and makeup.
By attaching the paper or the top plate and the decorative paper to each other, a strong cylindrical container made of paper can be easily obtained, the container can be manufactured with good workability, and waste of resources can be eliminated. it can.

[Brief description of drawings]

FIG. 1 is a perspective view of a paper container obtained by the manufacturing method of the present invention.

FIG. 2 is a sectional view of the container.

FIG. 3 is a partially cutaway front view illustrating the above manufacturing method.

FIG. 4 is an explanatory view of a processed state following FIG.

5 is a cross-sectional view in the processing state shown in FIG.

FIG. 6 is an explanatory view of a processed state following FIG.

FIG. 7 is an explanatory diagram of a processed state following FIG.

8 is an explanatory diagram of a processed state following FIG. 7. FIG.

FIG. 9 is an explanatory view of a processed state following FIG.

FIG. 10 is a partial cross-sectional view of the paper container showing a modified example.

FIG. 11 is an explanatory view of a processing state of a conventional example.

FIG. 12 is an explanatory diagram of a processed state following FIG. 11.

[Explanation of symbols]

 1 Paper Container 2,22 Body 2a, 22a Mouth 2b, 3a Bend End 3,23 Lid 7a, 7b Gear Roll 8 Wrinkle 12 Bottom Plate 14,18 Decorative Paper 17 Top Plate

Claims (2)

[Claims] 1. A a <br/> one end of the circular cylindrical barrel the body that is produced by the paper in a state where the clamped from inside and outside by a pair of gear rolls, all of the cylinder the body by the rotation of the gear rolls Circumferential wrinkling process and body with wrinkles
A step of folding the end portion of the body inward, a step of contact wear bottom plate from the inner side to the bent end portion of the cylinder body, the decorative paper from the outside to the bottom plate portion including a bent end portion of the trunk body process for manufacturing paper-made cylindrical vessel, characterized in that it consists of a step of contact wear. 2. One of cylindrical lids made of paper
A state in which the ends are sandwiched from inside and outside by a pair of gear rolls.
Rotation of these gear rolls,
Wavy wrinkles on the wrinkle and the edge of the wrinkled lid
Of bending the inner part inward, and the bent end of the lid body
The step of adhering the top plate to the inside of the
Glue the decorative paper from the outside to the top plate part including the edge part
Of a cylindrical container made of paper, characterized by the following steps:
Method.