JP2008007118A - Sheet connecting method and cylindrical container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet connection method for engaging opposite sides with each other by providing engagement means on a pair of opposite sides of a square sheet, and a cylindrical container in which a V-shaped notch is not seen from a surface side when a folding piece formed on the lower opening edge of a cylindrical container body is folded and a bottom plate is stuck thereto. <P>SOLUTION: The cylindrical container comprises a container body comprising a cylindrically rounded square sheet and joining means provided on the pair of opposite sides facing each other of the sheet, the folding piece formed by forming the V-shaped notch at the lower opening edge of the container body, a folding line formed at a position where the folding piece is bent inward the container body, and the bottom plate with the folding piece stuck to a lower surface bent at right angles on the inner side of the cylinder. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for connecting two thin flexible sheets, a cylindrical container body manufactured by this method, and a cylindrical container provided with a bottom plate for closing a lower opening of the container body.

The conventional method of connecting two thin sheets of resin or paper, or the method of connecting one side by rolling a single sheet into a cylindrical shape, is to bond the connecting parts to the joined part There were a method of applying an agent or a method of fixing a joint with a stopper (such as a stapler). (For example, see Patent Document 1)
However, when fixing with an adhesive, since the sheet is deformed or warped, the time until the adhesive is stuck must be maintained with the two sheets fixed to prevent the joint from floating or moving. Therefore, there is a drawback that a holding tool or a positioning tool to be fixed is required, and that a manufacturing time becomes long.
When manufacturing a cylindrical container body by this method, the other than the joint part of the sheet bends into a cylindrical shape on average, whereas the joint part tries to maintain flatness by the drag of the two stacked sheets, The container body has a drawback that it does not become a perfect circle.
In addition, in order to form the container body in a perfect circle, the overlapped joint portion has to be fixed with a pressing die having a radius slightly smaller than the radial dimension of the cylinder.
Each time the radial dimension of the cylinder changes, it is necessary to use a stamping die having a radius corresponding to the cylinder. Therefore, there is a disadvantage that the cost and space for holding many stamping dies are required.

When manufacturing a large-diameter cylindrical container, if one long sheet is used, only one joint may be used. However, since processing is performed from a large-sized sheet material, it is troublesome to transport, store, or handle a long sheet. There was a drawback of being.
In addition, when several sheets used for the container body are connected to form a cylindrical shape, the adhesive time is long as described above, so the manufacturing time becomes longer because the number of sheets to be used must be adhered and fixed. There was a drawback that it would.

In addition, since the overlapping portion of the sheet overlapped on the upper side appears to be a straight step corresponding to the thickness of the sheet, it does not look good.
In addition, there is a drawback that even if a decorative paper is applied from above, a straight stepped line is generated, and the appearance is not good.

In the method of fixing the sheet with the stopper, there is a defect that the line of the step is generated as described above, and at the same time, even if the decorative paper is attached, the part of the stopper is raised, so that the appearance is deteriorated.

Further, a V-shaped cut is formed in the lower opening edge of the cylindrical container body to form a folded piece, and the folded piece is bent at right angles to the inside of the cylinder, and then a bottom plate having a diameter substantially equal to the outer diameter of the container body is formed. There is a cylindrical container bonded to the lower surface of the folded piece. (For example, see Patent Document 2)
However, the folded piece is bent at the position of the V-shaped valley bottom, but when the bottom plate is bonded to the lower surface and viewed from the side, the valley bottom of the V-shaped cut is visible, and there is a disadvantage that the appearance is poor.
In addition, since the valley bottom that is visible becomes a small air vent and is ventilated, there has been a drawback that moisture or bacteria, pests, and the like invades the food and other products stored therein.
Therefore, in the cylindrical container having this configuration, it is necessary to apply decorative paper on the outside for the purpose of improving the appearance or preventing the deterioration of the stored product, but there is a drawback that the manufacturing cost becomes high.
Japanese Patent Laying-Open No. 2004-42977 (page 9, FIG. 7) Japanese Patent Laid-Open No. 7-285533 (page 4, FIG. 11)

In view of the above-mentioned conventional drawbacks, the present invention provides a method of engaging a pair of opposite sides of a square sheet to engage the opposite sides, and a fold formed at a lower opening edge of a cylindrical container body. It is an object of the present invention to provide a cylindrical container in which a V-shaped cut is not exposed to the outer periphery when a piece is folded and a bottom plate is bonded.

In order to achieve the above object, the present invention provides two sheets obtained by cutting a sheet material, engagement means formed on one side of one sheet, and one side facing the joint side of the other sheet. The sheet connecting method is constituted by the engaging means that engages with the joining side formed on the side.
Further, the sheet material is cut into a square shape and rounded into a cylindrical shape, the joint side formed by alternately cutting the concave portion and the convex portion on the left side of the opposite sides of the sheet, and the left side joint surface. Consists of a convex side that can be fitted to one side of the right side corresponding to the concave part and the convex part, and a joint side that is formed by alternately cutting the concave part, and one convex part is fitted to the other concave part to join the left side A cylindrical container body is constituted by a cylindrical container body formed by engaging the side and the right joint side, and a bottom plate that closes the lower opening of the container body.

According to the present invention, the following effects can be obtained.

2. The two sheets obtained by cutting a sheet material, engagement means formed on a joint side of one side of one sheet, and the joint formed on a joint side of one side facing the joint side of the other sheet. Since the connecting method of the sheet is constituted by the engaging means that engages with the side, the connection can be positioned without using a positioning tool by engaging both of the opposing joining sides, so that the two sheets Since there is no detachment movement, an effect that connection work is easy can be obtained.
In addition, since the position is fixed by engaging both opposing joining edges, the overlapping surface is not separated or the connecting portion is not displaced due to deformation or warpage of the two sheets. Since it is not necessary to suppress and fix the connecting portion for the time until the adhesive is glued when bonded, the effect of starting the next bonding operation immediately after one bonding operation is completed can be obtained.

In Claim 2, two sheets which cut sheet material, a joined side which cut and formed a crevice and a convex part by turns on one side of one sheet, and the crevice on one side facing the joined side of the other sheet Consists of projections that can be fitted to correspond to the projections and joint sides that are formed by alternately cutting recesses, and engaging two sheets by fitting one projection into the other recess. Since the sheet connecting method is configured, even if the two sheets are deformed or warped, the engagement state of the two sheets can be maintained by fitting the respective concave and convex portions. I can do it.
In addition, just by fitting the concave and convex portions with approximately the same width, the top and bottom width positions of the two sheets are aligned, so there is no need to use a positioning tool as in the prior art. is there.
Therefore, the same effect as that of claim 1 can be obtained.
Further, the position of the step corresponding to the thickness of the sheet whose upper surface is the upper side of the joint portion of the present invention appears alternately with the bottoms of the concave portions of the joint portions on both sides slightly shifted, so when the decorative paper is pasted Since the step appearing on the surface is less conspicuous than the straight step, the effect is that the appearance is good.

In Claim 3, the sheet | seat which cut the sheet | seat material into square, The left side joining edge which cut and formed the recessed part and the convex part by turns on the left side among a pair of left and right opposing sides of this sheet, The left side joint side and the right side of the second sheet are formed by alternately forming convex portions and concave portions that can be fitted in correspondence with the left concave portion and the convex portion on the side. One convex part of the joint side is fitted to the other concave part, the left joint side and the right joint side are engaged, and the third and subsequent sheets are engaged in the same manner. Because it is configured, when manufacturing a container with a large circumference, one sheet of one length is used for the required length without using a sheet member having a length corresponding to the circumference. In this way, the effect that it can be produced is obtained.
Also, if one type of sheet is stocked, an effect is obtained that various types of container bodies can be easily manufactured with a cylindrical size at a constant interval.

5. The sheet according to claim 4, wherein the sheet material is cut into a square shape and rounded into a cylindrical shape, a joint side formed by alternately cutting a concave portion and a convex portion on the left side of opposite sides of the sheet, and the left side joint Consists of a convex portion that can be fitted to the concave portion and the convex portion on the right side facing the side, and a joint side that is formed by alternately cutting the concave portion, and fitting one convex portion to the other concave portion Since the cylindrical container is constituted by the cylindrical container body formed by engaging the left and right joint sides and the bottom opening of the container body, the joint sides on both sides are joined. Since the fitting part does not move at the time, the joining side can maintain the engaged state even before the joining part is bonded with the adhesive.
Therefore, the same effects as those of the first and second aspects can be obtained.
In addition, each of the convex portions acts to press the mating sheet from the inside to the outside, but since the area of the convex portion is small and the elastic force of the mating sheet having a large area is larger, the convex portion has a cylindrical shape. Follow the inner surface of the mating sheet.
Therefore, it is possible to obtain a perfect circular cylinder without using a pressing die manufactured according to the conventional cylindrical radius.
In addition, when the adhesive is applied to the mating surface between the convex portion and the mating sheet, an effect is obtained that the joint portion is not displaced even if it is not pressed and held by a pressing die.

6. The container body according to claim 5, wherein a rectangular sheet is formed into a cylindrical shape, a folded piece formed by cutting a V-shaped cut into the lower opening edge of the container body, and a position slightly away from the V-shaped cut. A fold line formed on the circumference and a bottom plate formed by folding the fold piece at a right angle from the crease line to the inside of the container main body and pasting the fold piece with an adhesive on the bottom surface constitutes a cylindrical container. Is bent at a right angle from the crease line to the inside of the cylinder, the V-shaped groove bottom enters the inside slightly from the outer periphery of the cylinder, so that when the bottom plate is bonded, it is not visible from the outer periphery, so that the appearance is good.
In addition, since the V-shaped groove bottom slightly enters the inside of the outer periphery of the cylinder, the airtightness inside the container can be maintained if the bottom plate is bonded. Is obtained.
Therefore, there is an effect that there is no wasteful cost of applying decorative paper for the purpose of improving the appearance of the container or preventing the invasion of moisture or bacteria, pests and the like.

In the present invention, a sheet 2, 2 a shown in FIG. 1 and a joining side 3 in which an uneven cut is formed on one side of the sheet 2 are provided, and an uneven cut is formed on one side of the sheet 2 a facing the joining side 3. Providing the formed joining side 4 constitutes the main embodiment of the sheet connecting method.
2, 4, and 6, the sheet 2 rolled into a cylindrical shape, the joining side 3 in which an uneven cut is formed on the left side of the opposite sides of the sheet, and the uneven side on the right side A joining edge 4 formed with a cut, a folded piece 7 formed by making a V-shaped cut at the lower edge of the sheet 2, a crease line 9 formed at a position slightly away from the bottom of the V-shaped groove, and a bottom plate 10 And constitutes a main embodiment of the cylindrical container.
Embodiments of the present invention will be described below.

In the first embodiment of the present invention in FIG. 1, as shown in FIG. 1-(a), the first sheet 2 is provided with a joining side 3 formed with notches of convex portions 5 and concave portions 6, while On one side of the sheet 2a facing the joining side 3, a concave part 6a is provided at a position corresponding to the convex part 5, and a joint side 4 in which a notch of the convex part 5a is formed at a position corresponding to the concave part 6.
The convex portions 5 and the concave portions 6 and the convex portions 5a and the concave portions 6a are alternately formed. The convex portions 5 are in the fitting dimensions with the concave portions 6a, and the convex portions 5a are in the fitting dimensions with the concave portions 6.
As shown in FIG. 1- (b), the convex portions 5 and 5a of the respective joint sides are fitted into the concave portions 6a and 6 at the opposing positions, and the bases of the convex portions 5 and 5a are close to the bottom sides of the concave portions 6a and 6. The joining side 3 and the joining side 4 are engaged.

Conventionally, as shown in FIG. 10, a margin 11 is provided on one side of the first square sheet 2 and one side of the second sheet 2a facing the one side, and an adhesive is applied to the margin 11 so Although they are connected by overlapping, since a gap is formed in the joint portion 13 due to the warp of the sheet 2 and the sheet 2a, it is necessary to hold down the joint portion 13 until the adhesive is stuck.

However, in the present invention, as shown in the enlarged view of the portion A in FIG. 1- (b), when the joint sides on both sides are joined, the one concave portion 6, the convex portion 5 and the other convex portion 5a, the concave portion 6a are dotted. Since P1 and P2 are brought close to each other from the positions of P1 and P2, the fitting does not come out, so that the joint side can be kept engaged even before the joint is bonded with the adhesive.
Therefore, even if the sheet is warped, it is possible to maintain the state in which the joining side 3 and the joining side 4 are engaged. Therefore, an adhesive is applied to the mating surface between the convex portions 5 and 5a of the joining portion 13 and the mating sheet. Since it does not move even if it is allowed to stand after being applied and adhered, there is an effect that it is not necessary to suppress and fix the joint portion 13 until the adhesive is stuck.
Further, since the protrusions 5 and 5a and the recesses 6 and 6a are fitted with substantially the same width, the two sheets 2 and 2a are positioned with respect to each other. Positioned at the same position.
Therefore, there is an effect that the positioning work of the sheet 2 and the sheet 2a as in the prior art is not required.

As shown in FIG. 9, the shape of the joining side can be provided with a locking groove 14.
When the convex portion 5a is fitted into the concave portion 6 and then moved upward and brought into contact with the bottom of the locking groove 14, the vertical width positions of the sheets 2 and 2a are positioned at the same position, and the locking groove 14 is convex. Since the portion 5a is sandwiched and held, the effect of preventing the protrusion 5a from coming out more firmly can be obtained as compared with the joining of the joining sides without the locking groove 14.

The configuration of the cylindrical container of the present invention can also be applied to the lid of the cylindrical container.

Next, different embodiments of the present invention will be described.
In the description of the different embodiments of the present invention, the same components as those of the first embodiment of the present invention are denoted by the same reference numerals, and redundant description is omitted.

In the second embodiment of the present invention in FIGS. 2 and 3, the main difference from the first embodiment of the present invention is that the rectangular sheet 2 is rolled into a cylindrical shape and the opposite sides are A joint side 3 having a concave and convex cut is provided on one side of the left side, and a joint side 4 having a concave and convex cut is provided on the right side facing the concave and convex cut of the joint side 3.
A concave portion 6 is formed on the joint side 3, and a convex portion 5 a is formed on the joint side 4 at a position facing the concave portion 6. A concave portion 6a is formed on the joint side 4, and a convex portion 5 is formed on the joint side 3 at a position facing the concave portion 6a.
The convex portions 5 and the concave portions 6 and the convex portions 5a and the concave portions 6a are alternately formed. The convex portions 5 are in the fitting dimensions with the concave portions 6a, and the convex portions 5a are in the fitting dimensions with the concave portions 6.
Accordingly, the convex portions 5 and 5a are fitted into the concave portions 6a and 6 at the opposite positions so as to enter the inside of the cylinder, and the bases of the convex portions 5 and 5a are brought close to the bottom sides of the concave portions 6a and 6 3 and the joining side 4 are engaged, a cylindrical container body 1 is formed as shown in FIG.

When the sheet 2 shown in FIG. 11- (a) is rolled up and overlapped by providing the margins 11 and 11 on each of the opposite sides, the adhesive is applied to the mating surfaces and bonded, Since the joining portion 13 is displaced due to the cylindrical spring back, as shown in FIG. 11- (b), the pressing portion 12 is pressed so that the joining portion 13 does not move until the adhesive is stuck. It took time to leave.
In addition, the portions other than the joint portion 13 of the sheet bend in a cylindrical shape, whereas the joint portion 13 tries to maintain flatness by the drag force of the doubled sheets, so that the container body 1 does not become a perfect circle. In particular, in order to produce a small-diameter cylindrical container 1 in a perfect circle without deformation, it was necessary to fix the joint portion 13 with a stamping die 12 having a radius R slightly smaller than the radial dimension of the cylinder until the adhesive was glued. . The slightly smaller radius dimension means that the spring back is taken into consideration depending on the material of the sheet material and the size of the overlapping portion, and the radius R of the pressing die 12 must be set after confirming this spring back. There was annoyance.
In addition, every time the radial dimension of the cylinder changes, there is a drawback in that it is necessary to prepare a pressing die having a radius corresponding to the cylinder.

However, in the present invention, in FIG. 2, the widths of the convex portions 5 and 5a and the concave portions 6 and 6a are set to be substantially equal to each other, so that even if the sheet is warped or springback, The state in which the side 4 is engaged can be maintained.
Accordingly, the adhesive 13 is applied to the mating surfaces of the convex portions 5 and 5a of the joint portion 13 and the mating sheet, and the adhesive sheet does not move even if it is left to stand. The effect that it is not necessary to suppress and fix is obtained.
In addition, since the protrusions 5 and 5a and the recesses 6 and 6a are fitted with substantially the same width, the joint side 3 and the joint side 4 are positioned, so the upper and lower edges of the container body 1 are the same. The effect that it can position to a position is acquired.

  The third embodiment of the present invention in FIG. 4 differs from the second embodiment of the present invention mainly in that a folded piece 7 cut into a V shape is formed at the lower opening edge of the container body 1. A crease line 9 is formed on the circumference at a position slightly away from the V-shaped cut.

  Conventionally, as shown in FIG. 12, when the folding piece 7 cut into a V shape at the lower opening edge of the container body 1 is folded inside the container body 1, the folding piece 7 connects each of the valley bottoms 8 one by one. Since the valley bottom 8 remains on the outer periphery of the container body 1 as shown in FIG. 13, when the bottom plate 10 is attached to the folded piece 7, the valley bottom 8 is formed on the outer periphery of the container body 1 as shown in FIG. Since it was visible, the appearance was poor.

However, in the present invention, when the folding piece 7 is folded at a right angle inside the container body 1, the folding piece 7 is folded from the crease line 9 formed on the circumference slightly away from the valley bottom 8. The body 1 falls down from the outer periphery.
At that time, the sheet material between the valley bottom 8 and the crease line 9 is slightly wrinkled and rises from the lower surface of the folded piece 7. Therefore, when the bottom plate 10 shown in FIG. 6 is attached, the bottom plate 10 does not float above the bottom surface of the folding piece 7.
Therefore, when the bottom plate 10 is attached to the lower surface of the folded piece 7, the valley bottom 8 is completely invisible, and the appearance can be improved without attaching decorative paper to the outer periphery of the container body 1.
Further, since the V-shaped valley bottom 8 is slightly inward from the outer circumference of the cylinder of the container body, it is closed by attaching the bottom plate 10, and therefore, ventilation is prevented, so that moisture, bacteria, pests, etc. do not enter and the stored product deteriorates. Can be prevented.

A crease line 9 for folding the folding piece 7 is provided on the inner periphery or outer periphery of the container body 1 in accordance with the material and thickness of the sheet material.
Further, the distance from the V-shaped valley bottom 8 to the bending position is preferably determined in accordance with the material and thickness of the sheet material.
The shape of the V-shaped valley bottom 8 may be an acute angle or an R shape.

The fourth embodiment of the present invention in FIGS. 7 and 8 is mainly different from the first embodiment of the present invention in that the sheet 2 shown in FIG. 7 is the second embodiment of the present invention. This is the same form as the sheet 2 shown in FIG.
Two or more sheets 2 are prepared, and as shown in FIG. 7, the right joining side 3 of the first sheet 2 and the left joining side 4 of the second sheet are engaged and fastened with an adhesive. .
As shown in FIG. 8, after engaging the required number of sheets 2 after the third sheet, if the left and right joining sides 4 and 3 of the connected sheets are engaged with each other, the large diameter is obtained. Since a container body having a cylindrical shape is formed, a large-diameter cylindrical container can be manufactured by folding the folding piece 7 inside the cylinder and bonding a bottom plate having the same size as the outer diameter of the cylinder to the folding piece 7. I can do it.

In the past, it was necessary to prepare sheets of various lengths according to the type of large-diameter cylindrical container, so a large-size sheet material and a sheet punching die were required. Needed a storage space and was troublesome to transport and handle.
However, according to the present invention, since various types of cylindrical containers can be manufactured simply by preparing a sheet 2 of one type of length, a large sheet material and a sheet punching die that matches the size of the cylindrical container are provided. There is an advantage that the production cost is reduced because it is not necessary to prepare.

FIG. 3 is a perspective view according to the first embodiment. The perspective view in 2nd Embodiment. The perspective view in 2nd Embodiment. The perspective view in 3rd Embodiment. The perspective view in 3rd Embodiment. The perspective view in 3rd Embodiment. The perspective view in 4th Embodiment. The side view in 4th Embodiment. The side view of the other joining edge in 1st Embodiment. The perspective view showing the connection method of the conventional sheet | seat. The perspective view showing the method of connecting the conventional sheet | seat cylindrically. The perspective view which formed the conventional folding piece in the container main body. The perspective view which affixes a baseplate to the conventional container main body. The perspective view after bonding a baseplate to the conventional container main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, Container body 2, 2a, Sheet 3, Joining side 4, Joining side 5, 5a, Convex part 6, 6a, Concave part 7, Folding piece 8, Valley bottom 9, Crease line 10, Bottom plate 11, Paste margin 12, Stamping die 13, joint 14, locking groove

Claims (5)

Engage with two sheets of cut sheet material, engaging means formed on one side of one sheet, and the joint side formed on one side of the other sheet facing the joint side A sheet connecting method, comprising: an engaging means, wherein two sheets are connected by engaging both joint sides. Corresponding to the concave and convex portions on one side facing the joint side of the other sheet, two sheets obtained by cutting the sheet material, a joint side in which concave and convex portions are alternately cut and formed on one side of one sheet It is characterized in that it is composed of a convex part that can be fitted together and a joint side that is formed by alternately cutting concave parts, and two sheets are engaged by fitting one convex part into the other concave part. Sheet connection method. Of the pair of left and right opposing sides of the sheet, a sheet having a sheet material cut into a square shape, a left joint side formed by alternately cutting recesses and protrusions on the left side, and the left side on the right side The right side of the first sheet and the right side of the second sheet are formed by alternately forming a convex part and a concave part that can be fitted in correspondence with the concave part and the convex part. Of the sheet, wherein one convex portion is fitted to the other concave portion and the left and right joint sides are engaged, and the third and subsequent sheets can be similarly engaged. Connection method. A sheet cut into a rectangular shape by cutting the sheet material into a square shape, a joint side formed by alternately cutting a concave portion and a convex portion on the left side of the opposite sides of the sheet, and the concave portion and the convex portion on the right side It is composed of a convex side and a joint side that are formed by alternately cutting and forming a concave part, and one convex part is fitted to the other concave part to engage the left joint side and the right joint side. A cylindrical container characterized by comprising a cylindrical container body and a bottom plate that closes a lower opening of the container body. A container body formed into a cylinder with a sheet cut into a square, a folded piece formed by cutting a V-shaped cut into the lower opening edge of the container body, and a circumference slightly away from the V-shaped cut. A cylindrical container comprising: a crease line; and a bottom plate which is formed by folding the fold piece at a right angle from the crease line to the inside of the container main body, and affixing the lower surface with an adhesive.

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