JP2001096645A - Method for manufacturing peripheral wall for paper cover and paper cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a peripheral wall for a paper cover having a small adhering part, fast drying and a uniform thickness, and the cover using the wall. SOLUTION: The method for manufacturing a peripheral wall for a paper cover comprises a first step of cutting or punching a wide cardboard 1 having a peripheral wall length L of its one side from base paper P, a second step of cutting substantially 1/2 of a thickness t of the cardboard at a front side one edge 1a and a rear side another edge 1b perpendicularly crossed with one side of the cardboard 1 to provide a front side thin part 2 at the edge 1a and a rear side thin part 3 at the edge 1b, a third step of cutting or punching a band-like cardboard 4 of a peripheral wall width S from the cardboard 1 perpendicularly to a longitudinal direction of corrugating working to dispose the cardboard 4 at one end side of the longitudinal direction and the part 3 at the another end side, and a four step of bending the cardboard 4 of the longitudinal direction in a circular shape to superpose the part 2 of the one end side with the part 3 of the another side with one another and adhering the part 2 to the part 3.

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 peripheral wall for a paper lid, and a paper lid using the peripheral wall.

[0002]

2. Description of the Related Art Many paper lids fitted into the mouth of a circular container main body have a top plate fitted and locked on the upper part of the peripheral wall. The peripheral wall is disclosed in Japanese Utility Model Publication No. 45-11029, and FIG. As described above, the lower base paper A, the middle base paper B, and the upper base paper C are spirally wound around a cylindrical long mandrel M from three directions while applying glue, and the three base papers A, B, and C are bonded together. After the paper cylinder D is continuously formed, the paper cylinder D is cut into a certain width by a cutter N to form a peripheral wall E. When the paper cover F is formed using the peripheral wall E, The peripheral wall E was used after drying of the adhered portion.

[0003]

The peripheral wall for the paper cover is formed by spirally winding three base papers in three directions and cutting them from the paper cylinder body. However, it is wider than the peripheral wall where both ends of the strip of paperboard are overlapped and adhered, and there is a problem that it takes time to dry the adhered part, and since the three base papers are spirally wound, There was also a problem that the joint of the base paper appeared long. Moreover, when forming the peripheral walls having different diameters, there is a problem that a long mandrel corresponding to the diameter must be prepared and the long mandrel must be replaced. Therefore, the present invention has been made in view of such problems of the prior art, and has as its object the purpose of the present invention is to provide a paper cover peripheral wall having a small number of sticking portions and drying quickly and having a uniform thickness. It is an object of the present invention to provide a manufacturing method and a paper lid using the peripheral wall.

[0004]

In order to achieve the above object, a method of manufacturing a peripheral wall for a paper lid according to the present invention is to cut or punch out a wide paperboard having a peripheral wall length on one side from base paper in a first step. In two steps, a front side edge and a back side other edge perpendicular to one side of the wide paperboard are scraped off by approximately の of the thickness t of the paperboard, and a front side thin portion and a back side other edge are cut on one side of the front side. In the third step, the back side thin portion is stepped, and in the third step, the strip-shaped paperboard of the peripheral wall width is cut out or punched out from the wide board at right angles to the longitudinal direction of the stepping process, and the strip-shaped paperboard has the front-side thin portion at one end in the longitudinal direction. In the fourth step, the back side thin portion is located on the other end side, and the longitudinal direction of the band-shaped paperboard is curved in a circular shape, and the front side thin portion on one end side,
The back side thin portion on the other end side is overlapped and adhered to each other, and the seam of the strip-shaped paperboard is made the shortest with respect to the peripheral wall width.

[0005] The paper lid of the present invention comprises a peripheral wall and a top plate, and the peripheral wall is formed by curving the longitudinal direction of the strip-shaped paperboard into a circular shape, and has a front thin portion provided at one end and a back thin portion provided at the other end. Are superimposed and attached, the shortest seam is provided with respect to the peripheral wall width, and an upper rib is provided on at least the upper side in which the upper end portion of the peripheral wall is wound inward along the seam, and the top plate is the peripheral wall. And is in contact with the upper rib.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a method for manufacturing a peripheral wall for a paper lid according to the present invention will be described with reference to FIGS. 1 and 2. First, a wide paperboard 1 having a peripheral wall length L is cut from a base paper P in a first step. Alternatively, in the second step of punching, the front side one edge 1a and the back side other edge 1b orthogonal to one side of the wide paperboard 1 are scraped off by approximately 1/2 of the thickness t of the paperboard to form the front side edge 1a. Front thin part 2
, The back side thin portion 3 is stepped on the back side other edge portion 1b, and in a third step, the band-shaped paperboard 4 having the peripheral wall width S is cut or punched from the wide paperboard 1 in a direction perpendicular to the longitudinal direction of the stepping, or a band-shaped paperboard. 4
Is located at one end in the longitudinal direction, the front thin portion 2 is positioned at the other end, and the back thin portion 3 is positioned at the other end. In the fourth step, the longitudinal direction of the belt-shaped paperboard 4 is curved into a circular shape, and the front thin portion 2 at one end is positioned. And the back-side thin portion 3 on the other end side are superimposed on each other and adhered, and the joint 4a of the strip-shaped paperboard 4 is made the shortest with respect to the peripheral wall width S.

Next, a first embodiment of a paper cover according to the present invention will be described with reference to FIG.
The peripheral wall 5 is formed such that the longitudinal direction of the strip-shaped paperboard 4 is curved in a circular shape, and the front-side thin portion 2 provided at one end and the back-side thin portion 3 provided at the other end.
Are overlapped and adhered to each other to provide a shortest joint 4a with respect to the peripheral wall width S, and to provide at least an upper rib 6 on which the upper end 5a of the peripheral wall is wound on the inner peripheral side along the joint 4a. The top plate 7 is fitted inside the peripheral wall 5 and is in contact with the upper rib 6. The outer diameter of the top plate 7 is formed slightly larger than the inner diameter of the peripheral wall 5, the outer peripheral edge 7 a of the top plate 7 is curved upward, and the outer peripheral edge 7 a is simultaneously rolled in at the time of the inner peripheral winding of the upper end 5 a of the peripheral wall. , The upper rib 6 can be formed.

The second embodiment of the paper cover according to the present invention will be described with reference to differences from the first embodiment. The lower end 5b of the peripheral wall is connected to the inner side of the peripheral wall 5 as shown in FIG. 4
A folded portion 5c is provided on the inner peripheral side along the line a. The leading end of the folded portion 5c is located below the top plate 7, and the folded portion 5c and the upper rib 6 hold the top plate 7. On the inner peripheral side of the lower end portion of the peripheral wall 5, there is provided an overlapping portion 5 d in which the lower end portion 5 b of the peripheral wall is turned to the inner peripheral side, and the lower part of the peripheral wall 5 provided with the overlapping portion 5 d is further turned inward to the inner peripheral side. Is provided with a folded portion 5c,
If d is located below the top 7, the descent of the top 7 is further improved.

The third embodiment of the paper lid according to the present invention will be described with respect to differences from the first embodiment. As shown in FIG. 6, a hanging wall 8 overlapping the inner peripheral side of the peripheral wall 5 is provided on the outer periphery of the top plate 7 as shown in FIG. Provided,
On the lower side of the peripheral wall 5, a lower rib 9 in which the lower end 5b of the peripheral wall is wound inward along the seam 4a of the band-shaped paperboard 4 is provided. Prevents the descent. The lower end 5b of the peripheral wall 5 is folded back along the seam 4a of the band-shaped paperboard 4 toward the inner peripheral side of the hanging wall 8, and the folded portion 5c is formed.
A hanging wall 8 is interposed between the peripheral wall 5 and the
If the tip of c is located below the top plate 7, the lowering of the top plate 7 can be further prevented.

[0010]

The wide paperboard 1 can be cut or punched along the width direction of the base paper P as shown in FIG. 8C, but if cut or punched along the longitudinal direction of the base paper P. , Continuously cut or punch through. As shown in FIG. 8A, it is also possible to cut or punch only the strip-shaped base paper 14 along the longitudinal direction of the base paper P. Further, as shown in FIG. 8B, it is also possible to simultaneously cut or punch the wide paperboard 1 and the strip-shaped base paper 14 (unprocessed front-side thin portion 2 and back-side thin portion 3) along the longitudinal direction of the base paper P. . Strip-shaped paperboard 4
Is obtained by alternately shaving the front side and the back side of the strip-shaped base paper 14 as shown in FIG. 7 to form the front-side thin portion 2 and the back-side thin portion 3 twice the bonding width h for each peripheral wall length L. , Front side thin part 2,
Also, it can be formed by dividing the rear thin portion 3 into two parts.

The shaving of the front side one edge portion 1a and the back side other edge portion 1b can be performed separately.
Simultaneously shaving improves workability. In addition, band-shaped paperboard 4
Front side edge 1a and back side other edge 1 with respect to the longitudinal direction
The scraping width of b, that is, the sticking width h is the same, and the scraping amount is preferably scraped by 1/2 each of the paperboard thickness t, but the front thin part 2 and the back thin part 3 are overlapped with each other. When the paperboard thickness is equal to the paperboard thickness t and the inner and outer peripheral surfaces of the peripheral wall 2 are substantially flush with each other, the wall thickness of the front thin portion 2 differs from that of the rear thin portion 3 as shown in FIG. Is also good. Front thin part 2
The rear thin portion 3 is attached to the front thin portion 2 and the rear thin portion 3.
Apply glue, adhesive, or the like J to both or one of them, and make contact.

The seam 4a of the band-shaped paperboard 4 is the shortest with respect to the width S of the peripheral wall, is perpendicular to the longitudinal direction of the band-shaped paperboard 4, and is the winding direction of the upper end 5a and the lower end 5b of the peripheral wall, or the folding back of the lower end 5b of the peripheral wall. Since it is parallel to the direction, the seam 4a can be easily wound or turned over than the conventional peripheral wall having a spiral shape, and wrinkles due to the winding or turning can be prevented. The base paper P is made of elastic paperboard, waterproof paper, or the like.
May be in the width direction of the base paper P. The means for attaching the top plate 6 to the peripheral wall 5 is not limited to the above example, and any means can be used as long as it can be easily inserted into the peripheral wall 5 and can be easily held.

[0013]

The method for manufacturing the peripheral wall for a paper lid according to the present invention is as described above, and the following effects are obtained. Since the strip-shaped strip is curved in a circular shape and the front thin portion and the rear thin portion provided at one end thereof are adhered to each other to form a peripheral wall,
The seam of the band-shaped paperboard becomes the shortest with respect to the width of the peripheral wall, the adhesive portion is significantly reduced compared to the conventional spiral adhesion of the base paper on the peripheral wall, and the drying time of the adhesive portion is also drastically reduced. As a result, manufacturing of the peripheral wall is improved. Moreover, a strip-shaped paperboard having an arbitrary peripheral wall length can be easily formed only by changing a cutting position or a punching position of a wide paperboard and a shaving position with respect to the wide paperboard, and a strip-shaped paperboard having an arbitrary peripheral wall width can be easily formed from the strip-shaped paperboard. Not only can it be done, but the mandrel can be short.

Since the paper cover of the present invention is as described above, the following effects can be obtained. The seam of the band-shaped paperboard forming the peripheral wall is perpendicular to the longitudinal direction of the band-shaped paperboard, is the shortest with respect to the peripheral wall width, and is parallel to the winding direction of the upper end of the peripheral wall and the lower end of the peripheral wall, or the folding direction of the lower end of the peripheral wall. So
It is easier to wrap and fold than the conventional peripheral wall where the seam of the base paper forms a spiral, and wrinkles due to wrap and fold can be prevented. As a result, the printing surface of the peripheral wall becomes clean, and the appearance of the paper cover is also improved.

[Brief description of the drawings]

FIG. 1 is a process diagram showing first to third steps of a method for manufacturing a peripheral wall for a paper lid according to the present invention.

FIGS. 2A, 2B, and 2C are a process diagram showing a fourth step of the method for manufacturing a peripheral wall for a paper cover, a plan view of the peripheral wall, and a front view.

FIGS. 3A and 3B are enlarged plan views of essential parts showing an example of sticking of a front-side thin portion and a back-side thin portion.

FIGS. 4 (a), (b), and (c) are a partially cutaway front view and a cross-sectional view of a main part showing the first embodiment of the paper cover.

FIGS. 5A and 5B are a partially cutaway front view and a cross-sectional view of a main part showing a second embodiment of the paper cover.

FIGS. 6 (a), (b) and (c) are a partially cutaway front view and a sectional view of a main part showing a third embodiment of the paper cover.

7 (a), (b) and (c) are process diagrams showing an example of forming a band-shaped paperboard.

8 (a), (b), and (c) are process diagrams showing examples of cutting a base paper.

9 (a) and 9 (b) are a perspective view and a partially cutaway front view of a conventional peripheral wall showing a method of manufacturing the peripheral wall.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Wide paperboard, 1a Front side one edge, 1b Back side other edge 2 Front side thin part 3 Back side thin part 4 Band-shaped paperboard, 4a Seam 5, E peripheral wall, 5a peripheral wall upper end part, 5b peripheral wall lower end part,
5c Folded part 6 Upper rib 7 Top plate 8 Hanging wall 9 Lower rib 14 Strip base paper P Base paper, F Paper lid N Cutter, J Adhesive, etc. L Perimeter wall length, S Perimeter wall width, h Adhesion width t Paperboard thickness

Claims (2)

[Claims] In a first step, a wide paperboard (1) having a peripheral wall length (L) is obtained from a base paper (P) in a first step, and in a second step, one edge of a front side orthogonal to one side of the wide paperboard (1) (1a) and the other back edge (1b) are scraped off by approximately 1/2 of the thickness (t) of the paperboard, and the front side thin portion (2) and the back side other edge of the front side edge (1a) are cut off. (1b) is subjected to step processing of the back side thin portion (3), and in the third step, a band-shaped paperboard (4) having a peripheral wall width (S) is obtained from the wide paperboard (1) in a direction perpendicular to the longitudinal direction of the step processing. The paperboard (4) has a front thin portion (2) at one end in the longitudinal direction and a back thin portion (3) at the other end, and the longitudinal direction of the strip-shaped paperboard (4) is circular in the fourth step. It is curved, and the front thin portion (2) on one end and the back thin portion (3) on the other end are superimposed on each other and attached to each other, and the seam (4a) of the band-shaped paperboard (4) is joined to the peripheral wall width ( S) A method for producing a peripheral wall for a paper lid, wherein the peripheral wall is shortened. 2. A peripheral wall (5) and a top plate (7), wherein the peripheral wall (5) is formed by curving the longitudinal direction of the band-shaped paperboard (4) into a circle,
A front-side thin portion (2) provided on one end side and a back-side thin portion (3) provided on the other end are superposed and attached, and a shortest joint (4a) is provided with respect to the peripheral wall width (S). At least on the upper side, an upper rib (6) is provided in which the upper end (5a) of the peripheral wall is wound inward along the joint (4a), and the top plate (7) is inserted into the inside of the peripheral wall (5). A paper lid, which is in contact with the upper rib (6).