JP2001105487A - Method and device for forming channel-shaped formed body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a sheet formed of a plurality of channel-shaped formed bodies in parallel with in the manufacture proceeding direction. SOLUTION: A delivered sheet-shaped base is moved forward along a plurality of radial forming guides converged in the proceeding direction and then moved forward along the parallel guides. Simultaneously at least one or more of the sheet-shaped bases between the radial guides and the parallel guides are pressed and folded three-dimensionally to form a channel-shaped formed body sheet formed of a plurality of channel-shaped formed bodies.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a sheet composed of a plurality of groove-shaped formed bodies, and more particularly, to a method for continuously feeding a sheet-shaped base material wound in a roll shape, for example, to form the sheet. TECHNICAL FIELD The present invention relates to a method for forming a sheet including a plurality of groove-shaped formed bodies having arbitrary cross-sectional shapes substantially perpendicular to each other, which are cut at right angles to a traveling direction of a substrate.

[0002]

2. Description of the Related Art Conventionally, as this kind of groove-shaped molded body sheet, there is an internal structural material such as a cardboard for imparting rigidity. However, these groove-shaped molded body sheets are not parallel to the direction in which the groove-shaped molded body is manufactured, but are perpendicular to the direction in which the groove-shaped molded body is manufactured. . For example, a corrugated sheet-shaped or box-shaped grooved sheet having a short width is manufactured between two meshing gear-shaped rolls. That is, in the manufacturing method described above, a plurality of groove-shaped formed bodies are arranged in a direction perpendicular to the direction in which the product is manufactured. Instead of forming a long sheet made of a groove-shaped body, it was to form a short groove-shaped body.

In the case of producing a bag-shaped molded product for producing a plurality of bar-shaped sugars such as instant foods in a continuous and simultaneous manner, a plurality of narrow paper bases are fed out or a wide paper base is prepared. The material was divided into narrow pieces in the process, and then a three-dimensional molded body was manufactured one by one. Sugar or the like was put into the rod-shaped molded body, sealed, and cut into short pieces. That is, there has been no practical technique for forming a long sheet from a plurality of groove-shaped formed bodies parallel to the production progress direction using a single sheet-shaped base material fed out.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned method, and any cross sections cut at a right angle to the production progress direction from one sheet-like base material fed out are all substantially the same. An object of the present invention is to provide a method and an apparatus for manufacturing a sheet composed of a plurality of groove-shaped molded bodies parallel to a traveling direction which is a shape.

[0005]

According to the present invention, a sheet made of a plurality of groove-shaped molded articles is continuously cut using a sheet-like base material in a traveling direction of the sheet-like base material, and has substantially the same cross-sectional shape. And a method of forming a sheet composed of a plurality of groove-shaped formed bodies parallel to the production progress direction, wherein a step of feeding a sheet-like base material as a first step and a sheet continuously fed as a second step The sheet-shaped base material on the radial forming guide is almost always advanced on the radial forming guide, and at the same time, each adjacent radial forming guide and the radial forming guide are aligned. Between the sheet-shaped base material, by advancing while forming a groove-like shape via a radial forming guide, to be bent three-dimensionally to form a sheet comprising a plurality of groove-like molded bodies; As a third step, a step of advancing a plurality of groove-shaped formed bodies bent so as to converge radially along a parallel guide so as to be substantially parallel to a traveling direction of the groove-shaped formed body sheet. In the second step or the third step, or in both the second step and the third step, the sheet-shaped base material is pressed by a radial forming guide and / or a parallel guide. It has been found that this object can be achieved by a method and an apparatus for forming a sheet comprising a groove-shaped molded article of the present invention, and the present invention has been completed. Here, the sheet-like substrate refers to paper or a film, a paper-and-film integrated product, or a paper or a film obtained by subjecting a paper or film to a chemical treatment with a silicone resin, oil, a surfactant, or the like.

The present invention utilizes a plurality of radial forming guides that converge a traveling sheet-like base material in the traveling direction, and advances the sheet-like base material along the radial forming guides, thereby forming a plurality of groove-like formed bodies. The radial forming guide has an opening angle of 15 degrees or less, more preferably 10 degrees or less. When the opening angle is 15 degrees or more, wrinkles are formed on both sides of the sheet forming the radial forming guide and the subsequent groove-shaped formed body, so that a sheet composed of a plurality of uniform groove-shaped formed bodies cannot be obtained. These phenomena are considered to be due to the small elongation of the sheet-like substrate.
Similarly, there is a problem that wrinkles are formed on both sides of the sheet-like base material in the deformable space immediately before the radial forming guide, and a sheet including a plurality of groove-shaped formed bodies having the same shape cannot be obtained.
Here, the opening angle of the radial forming guide refers to β in FIG. 7, and refers to the angle between the radial forming guide at the end of the radial forming guide including a plurality of radial forming guides and the parallel line in the traveling direction of the sheet-shaped base material. .

The sheet comprising a plurality of groove-like molded articles of the present invention refers to the groove-shaped molded article as shown in FIG. 1, and refers to a long sheet having a groove-shaped molded article parallel to the longitudinal direction of a product. Also, in the groove-shaped molded body sheet of FIG. 1, the groove-shaped molded body sheets have the same shape and the same dimension, but they need not be all the same, and include a groove-shaped molded body having a plurality of shapes and dimensions. It may be a grooved sheet. More specifically, two to thirty or more sheets formed of the plurality of groove-shaped molded bodies of the present invention are formed from one sheet-shaped base material continuously and in parallel with the product manufacturing direction. FIG. 1 is a cross-sectional view of an example of a sheet composed of a plurality of molded grooves. FIG. 1A is a cross-sectional view of a sheet-shaped substrate, 11, 12, and 13 are folding lines, and similarly, FIG. Is another sheet-like substrate, 21, 22, 23, 2
4 and 25 are folding lines, (c) 3 is another sheet-like substrate, 3
1, 32, 33 and 34 are folding lines, (d) 4 is another sheet-like base material, and 41, 42 and 43 are folding lines. Before forming a sheet composed of a plurality of groove-shaped molded bodies, there is a case where a folding line auxiliary line is inserted beforehand so that the above-mentioned folding line is easily broken, and a case where a folding line auxiliary line is not inserted. It is preferable to insert a folding line auxiliary line before bending in order to make the shape of the sheet formed of a plurality of groove-like molded bodies formed from the sheet-like base material, and to make the dimensions accurate and to facilitate folding. These folding line assisting lines are preferably inserted in a direction that facilitates folding according to whether the traveling sheet-like base material is folded upward or downward.

[0008] The folding line auxiliary line of the present invention may basically be any as long as it can be easily bent. Specifically, it depends on whether a "streak" is inserted in the base material or a perforated line or the like is inserted. Can be achieved. As a method of inserting "streaks", as shown in FIG. 2, a roll 5 having a plurality of "male" projections 6 which are generally performed in the bag making industry and making one round on a circumference of the roll, and a "female" Similarly, a "streak" can be formed by sandwiching the sheet-like base material 1 between the roll 7 having the groove 8 and the roll 7 having one circumference on the circumference of the roll. When the bending direction is not only the same direction, the same "male" or "female" unevenness is not formed on each of the upper and lower two sandwiching rolls.
The "male" and the "female" may be meshed when the upper and lower rolls are combined by forming the irregularities. As another method, as shown in FIG. 3, perforated “discontinuous through cuts” reaching the back surface of the sheet-like base material are provided in a dotted line, but the gap between the cuts and the cuts are formed. By changing the length, adjustments can be made to prevent "cutting" and make it easier to fold. In general, the length of the unbroken cut is preferably 3 to 7 times the length of the cut through. Reference numeral 9 denotes a roll, and reference numeral 18 denotes a perforated cutter in which a knife portion of a circular rotary cutter is discontinuously cut to provide a portion that does not completely penetrate the sheet-shaped base material. 9 and the perforation cutter 18. As another method, the object can be achieved by making a “cut that does not penetrate” called a half cut that does not reach the back surface of the sheet-shaped substrate. This “cut that does not penetrate” may be continuous or discontinuous. It is also possible to use a perforated fold line auxiliary line and a streak fold line auxiliary line, etc., and these fold line auxiliary lines can be used before forming a sheet composed of a plurality of groove-shaped molded bodies. There is a method to be performed in advance or during the manufacturing process, but a sheet composed of a plurality of grooved molded bodies to be molded is composed of a plurality of grooved molded bodies in terms of obtaining the exact dimensions of each grooved molded body It is preferable to carry out in the course of the sheet manufacturing process.

In the second step of the present invention, the sheet-shaped base material which is continuously fed is aligned with a radial forming guide which converges in a plurality of traveling directions, and the sheet-shaped base material on the radial forming guide is almost always fixed to the radial forming guide. Advancing the sheet-shaped base material between the adjacent radial forming guides and the radial forming guides at the same time so as to form a groove, and bending the sheet three-dimensionally to form a sheet including a plurality of groove-shaped formed bodies. This radial forming guide may be a fixed object, a moving object, a long continuous object, or a discontinuous object. Specifically, it may be a traveling belt, a long rectangular pipe of a triangular or quadrangular shape or a long fixed metal wire of a circular shape, and a short rectangular pipe or a circular pipe may be radially opened. The radial forming guides may be arranged side by side. Further, a rotating body such as a disk, a gear, a blade, or the like may be arranged radially, and any rotating body may be used as long as it is regulated radially. The radial forming guide of the present invention is a continuous or discontinuous structure radially arranged linearly so as to converge in the traveling direction, and all the adjacent radial forming guides have a width as it advances. It is set to be narrow. For example, when the sheet-shaped base material travels on the radial forming guide, the point of the sheet-shaped base material on the radial forming guide is almost always shifted on the radial forming guide. It means to converge. In the case where the sheet-like base material travels under the radial forming guide, the point of the sheet-like base material below the radial forming guide almost always converges while moving under the radial forming guide. .

[0010] In the second step of forming a sheet comprising a plurality of groove-shaped molded articles by aligning the sheet-shaped base material with the radially formed guide of the present invention, the sheet-shaped base material to be fed out has a horizontal shape. In this case, the upper surface or the lower surface of the radial forming guide, or when the radial forming guide is vertical, advances while contacting the side surface or the like of the radial forming guide with the guide. At this time, the sheet-shaped base material between the radial forming guides is advanced while being formed into a groove shape through the radial forming guide. That is, for example, when the sheet-shaped substrate travels on a horizontal radial forming guide, the flat sheet-shaped substrate has a V-shaped groove shape on the lower side between the adjacent radial forming guides. Thus, a sheet composed of a plurality of groove-shaped molded bodies is formed. In the present invention, in the second step, the sheet-shaped base material between the adjacent radial forming guide and the radial forming guide is pressed so as to have a groove shape through the radial forming guide, or the second step. In the third step, without pressing, press so as to form a groove, or with both adjacent radial or parallel guides so that both steps of the second step and the third step form a groove. This object can be achieved by a method of pressing between the guides. Specifically, a method of pressing between adjacent radial or parallel guides using a pestle-shaped spherical material or the like, a method of placing a square pipe or the like almost parallel to the guide and pressing, or a slit opening As a result, there is a method of pressing from the back side by suction using the holes, a method of pressing by wind pressure, etc., but the pressing device is set so that the groove formed as the sheet-like substrate advances becomes deeper . The pressing device may be basically the same shape as the radial forming guide that is sized to mesh between adjacent radial forming guides, but usually a rotating pulley, fixed to mesh between the guide and the guide A circular pipe, a square pipe having the same vertical and horizontal height and the like are used. These steps may be performed by any method, but the pressing is performed simultaneously with the advance of the sheet-shaped substrate. In these pressing methods, for example, it is preferable to lower the running resistance of the sheet-like base material by baking Teflon or the like on a rotating body or a pipe as necessary. The radial forming guide of the present invention is a symmetrical fan-shaped shape which usually converges as it progresses, but a half-shaped fan shape which does not converge from only one side in which the fan shape is bisected in the traveling direction is also used. Included in the scope of the invention.

According to the present invention, the sheet-like base material is bent along the radial forming guide to form a sheet composed of a plurality of groove-like molded bodies, so that the single sheet-like base material fed out does not fit into a fan shape. Go. It is preferable to provide a deformable space immediately before the radial forming guide, that is, between the sheet-shaped base material to be fed and the radial forming guide. Folded by the radial forming guide by this space,
"Wrinkles" and "strain" generated at the start can be absorbed. This is the dimension resulting from the difference in length between the central part of the sheet-like substrate being formed and the end of the oblique side surface of the sheet-like substrate being formed, which results from the sheet-like substrate converging on the radial forming guide. The difference can help absorb this space. In this case, since the length dimension of the central portion of the sheet-shaped substrate being formed is shorter in terms of distance than the length of the oblique side edges of the sheet-shaped substrate being formed,
The central substrate is too long in length and creates play. The space may be completely free and deformed without any force, but it is preferable that the space be deformed in one direction by partially applying a force from the upper surface or the lower surface. As a method of applying this force, a method of applying a force to the center of the upper surface of the sheet-like substrate with a roll, a method of pressing the center of the upper surface with wind pressure, a method of suctioning from the center of the upper surface or the center of the lower surface, or a curved roll is used. However, it is preferable to use a curved roll. The length of this space in the traveling direction varies depending on the groove shape or number, but is preferably about 5 cm to 100 cm.

In the third step of the present invention, a plurality of grooves formed so as to converge radially are formed so as to be advanced in parallel with the direction in which the grooves are formed, and the grooves are formed in parallel with the direction in which the sheet-shaped base material advances. It is preferable to provide a plurality of parallel guides or the like so that the sheet made of each groove-shaped molded body advances in parallel. Specifically, it is good to install a parallel guide by a belt, a roll, a plate, a square material, or the like so that the grooves travel in parallel, but what is essential is a plurality of parallel guides for running the sheet-shaped base material in parallel. There may be.

The radial forming guide in the second step and the parallel guide in the third step may be continuous, but it is preferable to provide a deformable space between the second and third steps. By providing this space, the length of the central portion and the side portion of the sheet-shaped base material for shifting the sheet-shaped base material to be converged in a fan shape in parallel, or the "distortion" resulting from the change of the traveling direction. Can be absorbed. The length of this space is determined by the number, size,
Although it varies depending on the depth and the like, it is generally good to be about 5 cm to 100 cm.

[0014]

According to the present invention, for example, a sheet-shaped base material wound in a roll shape is fed out and advanced, and a plurality of cross-sectional shapes cut at right angles to the traveling direction of the present sheet-shaped base material are substantially the same. This is for forming a sheet made of a groove-shaped body. In addition, the present invention basically involves advancing one sheet-like base material along a radial forming guide composed of a plurality of guides, and simultaneously pressing the sheet-like base material between the radial forming guide and the guide. Alternatively, a sheet made of a plurality of groove-shaped molded bodies is continuously formed by pressing with a parallel guide portion or pressing between adjacent guides with both guides. Specifically, the intervals required to produce each of the target groove-shaped molded bodies of the present invention, such as the distance from the folding line 11 to the folding line 13 via the folding line 12 in FIG. In (b), the distance from the fold lines 21 to 22 and 23 to 24 is set, and in (c), the distance from the fold lines 31 to 32 to 33 is set as the distance between each radial forming guide and the radial forming guide. The interval at the start of the guide. However, 24 to 25 in FIG. 1B and 33 in FIG.
To 34, and 42 to 43 in (d) are the widths of the radial forming guides. The groove is gradually deepened while forming a groove between the radial forming guide and the adjacent radial forming guide, so that the width of the sheet-shaped base material is reduced along the radial forming guide. Therefore, in the present invention, the points of the sheet-shaped substrate on the radial forming guide almost always move on the radial forming guide and draw a locus of convergence. Here, if you draw a locus that almost always moves on the radial forming guide and converges, it is expressed when the start of the radial forming guide is slightly off the guide because there is `` slack '' in the center of the sheet-shaped base material There is also. However, the point on the guide follows the trajectory on the guide as it converges along the radial forming guide. The points of the sheet-like base material on the adjacent radial forming guides gradually approach with the movement, and the grooves become deeper by the approach, thereby forming a plurality of groove shapes of the sheet-like base material. This effect is the same whether a complete radial forming guide is used or a half-shaped radial forming guide that halves the radial forming guide in parallel with the traveling direction of the radial forming guide.

Next, a specific example will be described. FIG. 4 is a plan view of an apparatus for producing a sheet having a plurality of groove-shaped molded bodies according to the present invention. Kraft paper, which is a sheet-like substrate 1, is rolled 1
At this time, a perforation is made as a folding line auxiliary line 14 on the kraft paper using a perforation cutter 18. The kraft paper, which is the sheet-shaped base material 1, advances on the upper surfaces of the radial forming guides 51, 52, 53, 54, 55, 56. Here, the primary pressing roll, specifically 61,
Since 62, 63, 64, and 65 apply pressure downward from the top surface of the kraft paper, the kraft paper
As it progresses along 1,52,53,54,55,56, the kraft paper between each radial forming guide is pushed down to form a deep groove. Pressing rolls 61, 62,
The radial forming guides 51, 52, 53, 54, 55, 56 are in a state of pressing the sheet-like base material 1 at the time when 63, 64, 65 are operated. Secondary pressing roll 7
1, 72, 73, 74, 75 are pressing rolls 61, 62,
The groove is set to be deeper than 63, 64, 65, 66. Sheet-shaped substrate 1 on radial forming guide 51
As the point C and the point D of the sheet-like substrate 1 on the radial forming guide 52 advance on the radial forming guides 51 and 52 to the points C ′ and D ′, respectively, the distance between C and D becomes gradually shorter. It becomes smaller and becomes the distance between C'D '. The groove of the pressing roll 71 becomes deeper than that of the pressing roll 71 by the shortening of this distance, and a groove-shaped formed body is formed. Here, the points C and D on the radial forming guide advance to reach C ′ and D ′, but the trajectory of these points almost always advances on the radial forming guide. The sheet-like base material 1 being formed has the following pressing rolls, specifically, 71, 72, 73, 74, 7
The number of press rolls to be set to 5 and approaching the grooved shaped body of the target shape is appropriately increased or decreased as necessary. However, as in the present invention, usually about 2 places may be used, but 3 places or 4 places. There is also. Further, the sheet-like base material on which the groove-shaped formed body is formed advances and converges along the radial forming guide, but the next parallel guide, specifically, 81, 82, 83, 84, 85,
The process proceeds to 86 and is parallelized. These parallel guides 81, 82,
Between 83, 84, 85 and 86, a parallel part pressing roll for forming a final shape, specifically 91, 92, 9
3, 94 and 95, which are pressed by the parallel portion pressing rolls to complete the groove-shaped formed body sheet 17. In this specific example, the primary pressing roll, the secondary pressing roll and the third pressing roll are used.
The pressing is performed by all the secondary pressing rolls, but the secondary pressing roll and the tertiary pressing roll are used without using the primary pressing roll, or the primary pressing roll and the secondary pressing roll are used. The present invention is also applicable to the case where the pressing is performed only by the tertiary pressing roll without using the nip, or the case where the pressing is performed only by the secondary pressing roll without using the primary pressing roll and the tertiary pressing roll. Can be.

In this apparatus, radial forming guides 51, 5
A deformable space portion 19 of the sheet-like base material 1 is provided between 2, 53, 54, 55, 56 and the feeding roll 10. The second pressing rolls 71, 72, 73, 7 are fed out at the stage where the sheet-like base material 1 forms the groove-shaped formed body, and the radial forming guides are converged from the roll 10.
The distance between the central portion and the side portion of the sheet-shaped substrate 1 up to 4, 75 is different, and serves to absorb the remainder of the sheet-shaped substrate due to the short distance at the central portion. Further, a free space pressing roll 16 is installed at the center of the space from the upper surface, and pushes an extra sheet-like base material downward. This is for stabilizing the dimensions of the product by stabilizing the sheet-like base material 1 of the main space 19 on either side. The space 15 between the radial forming guide and the parallel guide also acts to absorb the distortion for making the groove-shaped formed bodies converging radially parallel. FIG.
FIG. 6 is a sectional view taken along the line BB 'of FIG. Normally, the radial forming guide has guides that converge radially on the same plane, but a radial forming guide having a horse saddle-shaped curved surface in which the central portion of the unwinding side radial forming guide is raised. May be.

[0017]

Example 1 A groove-shaped molded body sheet was manufactured using the apparatus shown in FIG. The equipment specifications of the equipment are as follows. Feeding roll 10: 700 mm width Each radial forming guide: width 25 mm × height 25 mm × length 1000 mm Distance between the feeding roll and the radial forming guide space:
500 mm Distance between the radial forming guide and the parallel guide space: 35
0mm parallel guide: width 25mm x height 25mm x length 200m
m Distance between points C and D on adjacent radial forming guides: 70
mm Distance between points C 'and D' on adjacent radial forming guides:
28 mm Distance between points E and F on adjacent parallel guides: 20 mm Distance between points E ′ and F ′ on adjacent parallel guides: 20 m
m Sheet-shaped substrate: polyethylene film laminated kraft paper 120 g / m ² Open angle of radial forming guide: about 6.5 degrees

FIG. 7 shows the target groove-shaped formed body sheet in the first embodiment.
Shown in The weight of the polyethylene film laminated kraft paper is 120 g / m ² at a speed of 4 m / min. The free space 19 before the radial forming guide is about 500 mm, and the free space 15 after the radial forming guide is 290 mm. When the kraft paper passes through the radial forming guides, it is pushed down by the primary pressing rolls 61, 62 and the like at the intermediate position of each adjacent radial forming guide, and is further pushed down by the secondary pressing rolls 71, 72 and the like. To approach the target grooved sheet. At this time, at the center of the space between the feeding roll and the radial forming guide, the excess paper is lightly pressed against the excess paper from above by using the free space pressing roll 16. Next, the kraft paper is transferred to a parallel guide for final molding and parallelization.
1, a groove-formed body sheet 1 which is press-molded at 92, etc.
It becomes 7. Here, the third pressing roll width 19 mm, depth 2
The width was set to 5 mm, and the width and depth of the primary pressing roll and the secondary pressing roll were set slightly larger than the formed width and groove depth only by pressing the tertiary pressing roll.

[0019]

According to the present invention, a groove-shaped formed body parallel to the manufacturing progress direction is continuously manufactured instead of the conventional groove-shaped formed body perpendicular to the manufacturing progress direction. As a result, a long groove-shaped molded body can be obtained, and a product having a very deep groove, which has not been conventionally possible, is also possible, and a product having a large degree of freedom in forming is also possible.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the structure of a groove-shaped formed sheet manufactured by the present invention.

FIG. 2 is a plan view of a folding machine used in the present invention.

FIG. 3 is a plan view of a perforation folding machine used in the present invention.

FIG. 4 is a plan view showing a state in which the groove-shaped molded body sheet of the present invention is being manufactured.

FIG. 5 is a sectional view taken along line A-A ′ of FIG. 4;

FIG. 6 is a sectional view taken along line B-B ′ of FIG. 4;

FIG. 7 is a cross-sectional view of the groove-shaped molded body sheet manufactured in Example 1.

FIG. 8 is a plan view for defining an opening angle of the radial forming guide of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Sheet-like base material 11, 12, 13: Folding line of sheet-like base material 2 Another sheet-like base material 21, 22, 23, 24, 25: Folding line of sheet-like base material 3 Another sheet-like base material 31 , 32, 33, 34: Folding line of sheet-shaped base material 4 Another sheet-shaped base material 41, 42, 43: Folding line of sheet-shaped base material 5 Stitching roll having male protrusion 6 Male protrusion 7 Having female groove Stitching roll 8 Female groove 9 Roll 10 Feeding roll 14 Perforated folding line auxiliary line on kraft paper 15 Free space after radial forming guide 16 Free space pressing roll 17 Groove shaped sheet 18 Perforated cutter 19 Radial forming Free space portions 51, 52, 53, 54, 55, 56 before guides: radial forming guides 61, 62, 63, 64, 65: pressing rolls (primary pressing rolls) 71, 72, 3,74,75: pressing roll (secondary press roll) 81,82,83,84,85,86: parallel guide 91,92,93,94,95: parallel portion pressing roll (Third press roll)

Claims (6)

[Claims] 1. A method of forming a sheet comprising a plurality of groove-shaped formed bodies parallel to a traveling direction of a sheet-like substrate using a sheet-like substrate continuously fed, wherein a sheet is formed as a first step. Unrolling the sheet-shaped base material, and aligning the sheet-shaped base material continuously fed out as a second step with a plurality of radial forming guides that converge in the traveling direction, and the sheet-shaped base material on the radial forming guide is almost always By proceeding on the radial forming guide, and simultaneously moving the sheet-shaped base material between each adjacent radial forming guide and the radial forming guide so as to form a groove shape through the radial forming guide, a three-dimensional structure is obtained. Into a sheet comprising a plurality of groove-shaped molded articles, and, as a third step, advance the plurality of groove-shaped molded articles bent so as to converge in a radial manner. A step of proceeding along a plurality of parallel guides so as to be substantially parallel to the direction in which the sheet is moved, and further comprising a second step or a third step, or both of the second step and the third step. In the above method, a method of pressing a sheet-like base material through adjacent radial forming guides and / or adjacent parallel guides to form a sheet including a plurality of groove-shaped formed bodies. 2. The method for forming a sheet comprising a plurality of groove-shaped formed bodies according to claim 1, wherein the opening angle (defined in the specification) of the radial forming guide is 15 degrees or less. 3. The method for forming a sheet comprising a plurality of groove-like formed bodies according to claim 1, wherein the sheet-shaped substrate has a deformable space immediately before the radial forming guide. 4. The method according to claim 1, wherein the sheet-shaped base material has a deformable space immediately after the radial forming guide. 5. A method for forming a sheet comprising a plurality of groove-shaped molded articles continuously from a sheet-like substrate, wherein a polygonal line is formed in the sheet-like substrate in the longitudinal direction of the sheet-like substrate. A method for forming a sheet comprising the plurality of grooved bodies according to claim 1. 6. An apparatus for forming a sheet composed of a plurality of groove-shaped molded articles parallel to a traveling direction of a sheet-like substrate by using a sheet-like substrate continuously fed out, wherein a sheet is formed as a first step. And the sheet-shaped base material continuously fed out as a second step is aligned with a plurality of radial forming guides that converge in the traveling direction, and the sheet-shaped base material on the radial forming guide is almost always By proceeding on the radial forming guide, and simultaneously moving the sheet-shaped base material between each adjacent radial forming guide and the radial forming guide so as to form a groove shape through the radial forming guide, a three-dimensional structure is obtained. A step of folding the sheet into a sheet composed of a plurality of groove-shaped formed bodies, and a plurality of groove-shaped formed bodies bent while converging radially as a third step,
Having a step of advancing along a plurality of parallel guides so as to be substantially parallel to the traveling direction of the groove-shaped molded body sheet, and further comprising a second step or a third step, or a second step and a third step. An apparatus which presses a sheet-like base material via adjacent radial forming guides and / or adjacent parallel guides in either step of the steps to form a sheet comprising a plurality of groove-shaped formed bodies.