JPH0579019B2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> In the composite corrugate body formed by integrating the corrugate core sheet and liner sheet of the present invention,
The same applicant as the present applicant has developed a technology that has high material strength against various external mechanical forces and can keep material and manufacturing costs low by providing the side wall portions of each corrugated groove in a meandering shape in the axial direction. Application No. 60-201839, "Folded Composite Corrugate Body and Method for Manufacturing the Same," and Application No. 60-293214, "Reinforced Composite Corrugate Body and Method for Manufacturing the Same," relate to reinforced composite corrugate bodies and methods for manufacturing the same. be.

<Prior Art> Corrugated cardboard is known as a typical conventional composite corrugated body, but due to the shape of the corrugated core inside the corrugated cardboard, its out-of-plane compressive strength, out-of-plane bending strength, and in-plane compressive strength are Because the strength is not very high, when high-strength corrugated board is required, the current situation is to use thick sheet base paper or to laminate multiple corrugated boards to supplement the strength, resulting in extremely high costs. The problem arises that we are forced to use cardboard.

<<Problems to be Solved by the Invention>> The present invention has been made in view of the above-mentioned problems, and its purpose is to attach a corrugated core sheet of conventional corrugated board to the groove axis near the top and bottom of the corrugated groove. By replacing the corrugated core sheet with the corrugated core sheet of the present invention, which is provided with bent portions of peaks and valleys in a meandering direction, the buckling strength against out-of-plane compressive force of the reinforced composite corrugated body is lower than that of the conventional corrugated core sheet. This is dramatically improved compared to corrugated cardboard, and as a result, it is possible to significantly increase both the out-of-plane bending strength and the in-plane compressive strength in the direction orthogonal to the corrugated grooves. Therefore, when a relatively thin base paper sheet is used for the corrugated board made of the reinforced composite corrugated body of the present invention, strength performance equivalent to or greater than that of conventional corrugated board can be obtained, and the depth of the corrugated grooves can be made relatively large. It provides a level of strength that could not be expected from conventional cardboard. As a result, although the corrugated board according to the present invention has a slightly increased amount of base paper sheets per predetermined unit area of conventional corrugated board, each strength is significantly improved, and the material cost is ultimately significantly reduced. Its production can be fully automated at the same high speed as in the past, and low-cost machinery and equipment based on simple principles are used, so manufacturing costs can be kept at the same level as in the past. The object of the present invention is to provide a reinforced composite corrugated body and a method for manufacturing the same, which can solve many of the problems mentioned above.

<Means for Solving the Problems> In order to achieve the above object, according to the reinforced composite corrugate body of the present invention, the composite corrugate body in which the corrugate core sheet and the liner sheet are integrated, The corrugated core sheets are connected in a serpentine shape in the direction of the groove axis near the top and bottom of the corrugated groove, and each mountain,
This is obtained by providing a valley bent portion.

Preferably, the corrugated core sheet has a single crest and trough folded portion continuously formed in a meandering manner in the direction of the groove at the top and bottom of the corrugated groove.

Preferably, the corrugated groove has a meandering shape in the direction of the groove near the top and bottom, and each peak and valley bend portion having an extremely small curved cross section is generated.

Preferably, near the top and bottom of the corrugated groove, flat portions having substantially the same width and meandering in the direction of the groove are formed so as to form gentle slopes substantially perpendicular to the groove.

Preferably, near the top and bottom of the corrugated groove, the flat portions are bead-shaped in the direction of the groove and whose widths change alternately, so that the flat portions are formed so as to substantially form gentle slopes in the direction of the groove.

Preferably, the corrugated groove has a meandering shape in the groove direction near the top and bottom, and flat portions having approximately the same width are formed as horizontal surfaces.

Preferably, the corrugated groove has a meandering shape in the groove direction near the top and bottom, and each mountain and valley bend portion has a large curved cross section.

Preferably, the corrugated groove has a meandering shape in the groove direction near the top and bottom, and a horizontal flat part with approximately the same width, and on the flat part, there are multiple depressions and bulges in the direction perpendicular to the groove. It is caused by the generation of

Preferably, a horizontal flat part is formed in the vicinity of the top and bottom of the corrugated groove in a meandering direction in the groove direction and has approximately the same width, and around the flat part, each depression is substantially parallel to the flat part; It is caused to generate a protuberance.

In the present invention, the peak and valley bent portions are a general term for linear or band-shaped uneven deformed portions obtained by bending a predetermined portion of a sheet-like object out of plane, and this refers to the uneven deformed portions of the sheet-like object before bending. In principle, it is a reversible deformation that can be restored.More specifically, the planar shape of the bent part may be a straight line, a polygonal line, a curved line, or a plurality of closely parallel lines or a wide band. In addition, the cross-sectional shape may be a bent straight line, a smooth curved line, or an appropriate combination of the above, and any of these may be effective in the present invention.

In addition, the term "integration" in the present invention is a general term for the state of bonding between sheets, and includes bonding, adhesion, fusing, hanging, tightening with a third component, tight bonding, etc., and there are various other methods as well. There are various combinations of the above, and appropriate combinations of the above are also effective in the present invention.

In addition, the depressions and upheavals of the present invention correspond to the subordinate elements if the above-mentioned mountain and valley folded parts are the main constituent elements of the present invention, and are a general term for the irregularly deformed parts formed on the sheet-like material, and In addition to the concept of mountain and valley bent portions, there is also an embossed portion formed by locally protruding a sheet material out of the plane under pressure, and in addition to this, the present invention also includes an appropriate combination of the above-mentioned uneven deformed portions. It is valid.

<<Embodiments>> Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 7 show reinforced composite corrugated bodies according to the first to seventh embodiments of the present invention, each figure a is a broken perspective view, and each figure b is a developed view of a corrugated core sheet. .

In the reinforced composite corrugated body 00 shown in FIG. 1a, which is the first embodiment, the corrugated core sheet 10 has linear crest bent portions 30 and valleys meandering horizontally in the axial direction at the top and bottom of the corrugated groove. A bent portion 40 is formed and bonded together with the liner sheet 20. Center sheet 1 in figure b
At 0', the positions corresponding to the respective peaks and valleys are shown.

In the reinforced composite corrugated body 00 of FIG. 2a, which is the second embodiment, the corrugated core sheet 10 has ridge-folded portions 30 and valleys that form horizontal zigzag lines in the axial direction at the top and bottom of the corrugated groove. A bent portion 40 is formed, and the liner sheet 20
It is pasted together with.

Regarding the reinforced composite corrugated body 00 shown in FIG. 3a, which is the third embodiment, the corrugated core sheet 10 has band-shaped mountain folds that meander horizontally in the axial direction and are slightly curved near the top and bottom of the corrugated groove. A bent portion 31 and a valley bent portion 41 are formed,
It is bonded together with the liner sheet 20.

Regarding the reinforced composite corrugated body 00 of FIG. 4a, which is the fourth embodiment, the corrugated core sheet 10 has two ridge-folded portions 30 that meander horizontally in the axial direction near the top and bottom of the corrugated groove, The valley bent portions 40 are formed to be substantially parallel, and as a result, the two bent portions 30 or 40
A band-shaped flat surface 50 which meanderes between the grooves and alternately changes direction and slopes in a direction perpendicular to the groove is formed and is bonded integrally with the liner sheet 20. The corresponding positions of the respective peaks and valleys of the folded portions 30 and 40 in the core sheet 10' of FIG.

In the reinforced composite corrugated body 00 shown in FIG. 5a, which is the fifth embodiment, the corrugated core sheet 10 has two ridge-folded portions 30 and valleys that meander in the axial direction near the top and bottom of the corrugated groove. Bending part 4
0 is formed so as to be line symmetrical, and as a result, between the two bent portions 30 and 40, a bead-shaped flat surface 52 whose width changes alternately and undulates in the direction of the groove is generated. , liner sheet 20
It is pasted together with.

Regarding the reinforced composite corrugated body 00 shown in FIG. 6a, which is the sixth embodiment, the corrugated core sheet 10 has two ridge-folded portions 30 and valley-folded strips that meander in the axial direction near the top and bottom of the corrugated groove. The curved portions 40 are formed to be substantially parallel,
Furthermore, the side wall portions 61, 71 of this corrugated groove
As a result, a meandering and horizontal band-shaped flat surface 51 is generated between the two bent portions 30 and 40, and the liner sheet 20 is formed into a curved shape.
It is pasted together with.

In the reinforced composite corrugated body 00 of FIG. 7a, which is the seventh embodiment, the corrugated core sheet 10 has strip-like strips that meander horizontally in the axial direction and curve relatively largely near the top and bottom of the corrugated groove. By forming the mountain bent portion 34 and the valley bent portion 44, and at the same time forming the groove side wall portions 61, 71 into curves, the band-like bent portions 34, 44 which are relatively largely curved have their shapes changed. It is stably held and bonded together with the liner sheet 20.

8 and 9 are the eighth and ninth embodiments of the present invention.
FIG. 2 is a cross-sectional view of a corrugated core sheet of a reinforced composite corrugated body according to an example in a direction perpendicular to corrugated grooves.

The corrugated core sheet 10 of the reinforced composite corrugated body shown in FIG. 8, which is the eighth embodiment, has a curved surface obtained by curving the inclined band-shaped flat surface 50 shown in the core sheet 10 of the fourth embodiment. 32, and the corrugate core sheet 10 of the reinforced composite corrugate body shown in FIG.
This is a modification of the eighth embodiment having a curved surface 33 obtained by curving the side wall portions 60, 70 in the same direction as shown in the corrugated core sheet 10 of the embodiment.

The first embodiment can be said to be the principle reinforced composite corrugated body 00 of the present invention, in which the top and bottom portions 30 and 40 of the corrugated core sheet 10 form a horizontal meandering ridgeline, and the corrugated grooves In the cross section in the direction perpendicular to the axis of
Since the vertical compressive strength against the top and bottom portions 30 and 40 of the groove is extremely high, and furthermore, the side wall portions 60 and 70 form continuous curved surfaces that meander smoothly in the groove axis direction. , due to the in-plane compressive force and shearing force in the axial direction and the orthogonal direction to the composite corrugated body 00, the both side wall portions 6
Stress is dispersed and distributed over the entire length in the groove direction of 0.70 mm without being locally concentrated, and as a result, high mechanical strength can be exhibited in the entire corrugated groove.

Further, the corrugated grooves are formed on both wall portions 60, 7.
Since the composite corrugated body 00 of the present invention using the corrugated core sheet 10 is formed as a continuous curved surface in a serpentine shape in the direction of the groove axis over its entire length, the above-mentioned both walls are caused by the compressive force in the out-of-plane direction. As a result, it has become possible to have high out-of-plane compressive strength.

Furthermore, since the top and bottom portions 30, 40 are formed into smooth curved shapes, and the both side wall portions 60, 70 are formed into smooth curved surfaces, the rollers 05-05' as in the 44th or 45th embodiment, For a flat core sheet 10' to be corrugated by a method such as 06-06', the grooved tooth patterns 80, 8 of the rollers are
1 is formed to have a smooth curved top, which is essentially a ridge line in the axial direction of the roller, thereby avoiding point concentration of compressive force caused by the roller, thereby preventing damage during processing of the core sheet 10'. It is possible to form corrugated grooves reliably and at high speed without any occurrence of corrugated grooves.

In the second embodiment, as in the first embodiment, both side wall portions 60 and 70 form two sides of a triangle, sandwiching the top and bottom portions 30 and 40, which are acute angles in the cross section of the corrugated core sheet 10 in the direction perpendicular to the groove. Therefore, the vertical compressive strength for the top and bottom portions 30, 40 of the groove is extremely high;
0 forms a zigzag bent surface while bending in the direction of the groove axis, the bent portions of the both side wall surfaces 60, 70 are applied to the composite corrugated body by in-plane compressive force or shearing force in the direction of the groove or in the coaxial orthogonal direction. 30', 40' and the bent portions and bent portions 30, 4
Since the stress is concentrated at the concentration point of 0 and the corrugated groove locally causes premature failure, this reinforced composite corrugated body cannot achieve the strength as high as that of the first embodiment.

Further, the corrugated groove has both side wall portions 60,
Since the corrugated core sheet 70 is formed as a zigzag-shaped folding surface in the direction of the groove axis, the corrugated core sheet 10
The above composite corrugated body 00 of the present invention using
The out-of-plane compressive force tends to cause the flat plate surface constituting the folded plate surface to undergo buckling deformation, resulting in a disadvantage that the out-of-plane compressive strength cannot be obtained as much as in the first embodiment.

Furthermore, since the top and bottom portions 30 and 40 have a zigzag curved line shape and both side wall portions 60 and 70 are formed as zigzag curved surfaces, the 44th or
45 Rollers 05-05', 06-0 as in the embodiment
In the flat core sheet 10' to be corrugated by the rollers 6' or the like, the compressive force by the rollers is forced to be concentrated at a point, and as a result, the core sheet is easily damaged during processing.

The third embodiment has the advantage that the top and bottom of the corrugated groove in the corrugated core sheet can be easily kept horizontal, and that a relatively large bonding area of the liner sheet can be obtained, but it is said that corrugating is somewhat difficult. have shortcomings.

In both the fourth example and the fifth example, the flat surfaces, which are the tops and bottoms of the corrugated grooves in the corrugated core sheet, are inclined, so that a sufficient bonding area with the liner sheet cannot be obtained.

In the sixth embodiment, the flat surfaces, which are the top and bottom of the corrugated groove in the corrugated core sheet, are horizontal and have a wide area, so if the integral lamination with the liner is sufficiently performed, the corrugated groove will be compressed in the axial direction. The strength is significantly improved compared to the first and second embodiments.

In the seventh embodiment, slightly large curved surfaces 34, 44 with the cross-sectional center line 02 as the axis of symmetry are formed near the top and bottom of the corrugated groove in the corrugated core sheet, so that horizontal and wide strip-like lamination with the liner is possible. The surface can be stably held, and when the composite corrugated body is made of the same, the in-plane compressive strength and shear strength are higher than those of the first, second, and third embodiments. 34 and 44 have elasticity and function to prevent out-of-plane impact damage. Furthermore, the curved cross-sectional shapes with large curvature near the top and bottom of the corrugated grooves are the tooth shapes 80, 81 of the corrugated rollers 05-05', 06-06', as in the 44th, 45th, and 48th embodiments.
Since it is similar to the cross section of 82, it has the distinctive feature that it is possible to form corrugated grooves reliably and at high speed during corrugating processing.

FIG. 10 is a detailed perspective sectional view and a detailed sectional view of reinforced composite corrugated bodies of the fourth and sixth embodiments of the present invention, and FIG. 12 is a detailed perspective sectional view and a detailed sectional view of reinforced composite corrugated bodies of the fourth and eighth embodiments of the present invention, and FIG. 13 is a detailed perspective sectional view and a detailed sectional view of the reinforced composite corrugated bodies of the fourth and eighth embodiments of the present invention. FIG. 7 is a detailed perspective cross-sectional view and a detailed cross-sectional view of the seventh embodiment, respectively shown as a cross-sectional shape of a thick solid line and a thick broken line.

Developed diagram of corrugated core sheet Figure 4b, 3
The cross section of the corrugated groove formed by providing only the mountain bent portions 30 and valley bent portions 40 shown in FIG.
It is generated as The top and bottom of the corrugated groove become a flat surface 50 with an inclined surface or a curved surface 31 with a small curvature, and the bonding area with the liner sheet is extremely small, making it difficult to fully integrate the corrugated groove as shown in FIG. When machining corrugated grooves, a problem arises in that it is not easy to reliably form acute corner portions or curved portions with small curvature.

The corrugated groove and its corrugated core sheet having the cross-sectional shape indicated by the thick solid line 04 in FIGS. 10 to 13 have improved the above-mentioned drawbacks and solved the problem.

In FIG. 10, the both side wall portions 60 and 70 in the cross section of the corrugated groove indicated by the thick solid line 03 are located at a position corresponding to a shape in which the side walls 60 and 70 are almost parallelly moved by a predetermined amount in the direction of the cross-sectional center line 02 from the corrugated groove center line 01.
The corrugated grooves shown by thick broken lines 04 on both side wall portions 60 and 70 are provided with horizontal flat surfaces 51 at their tops and bottoms, and their shape is reliably and stably formed and maintained.

In FIG. 11, both side wall portions 60 and 70 in the cross section of the corrugated groove indicated by a thick solid line 03 are provided at positions corresponding to a shape curved by a predetermined amount in the direction of the cross-sectional center line 02 from the corrugated groove center line 01. The corrugated grooves shown by thick broken lines 04 on both side wall portions 61 and 71 have horizontal flat surfaces 51 at their tops and bottoms, and their shape can be formed and maintained reliably and stably.

In FIG. 12, both side wall portions 60 and 70 are provided at positions corresponding to the shape in which both side wall portions 60 and 70 in the cross section of the corrugated groove indicated by a thick solid line 03 are inclined inward toward the cross-sectional center line 02. The corrugated groove shown by the thick broken line 04 of 70 has a curved surface 32 having no axis of symmetry near its top and bottom, so that its shape can be reliably and stably formed and maintained.

In FIG. 13, both side wall portions 60 and 70 in the cross section of the corrugated groove indicated by the thick solid line 03 are provided at positions corresponding to the shape curved by a predetermined amount in the direction of the cross-sectional center line 02 from the corrugated groove center line 01. The corrugated grooves shown by thick broken lines 04 on both side wall portions 61, 71 are formed with curved surfaces 33, 44 having relatively large curvatures near the top and bottom, with the axis of symmetry being approximately the center line of the cross section. The shape can be formed and maintained reliably and stably.

The sixth embodiment indicated by the thick broken line 04 in FIGS. 10 to 13 has a flat surface with the top and bottom of the corrugated groove being horizontal, and the seventh embodiment has a flat surface where the top and bottom of the corrugated groove are horizontal. The bottom part becomes an inclined curved surface, and in the eighth embodiment, the top and bottom of the corrugated groove become a curved surface with a large curvature with the axis of symmetry approximately at the center line of the cross section, so the bonding area with the liner sheet can be greatly increased. Since it can be expanded, integration becomes easy and tight, and in particular, the cross-sectional shape of the corrugated groove in the eighth embodiment near its top and bottom is an optimal shape for using the gear cross-section of a normal corrugator as a matrix. Therefore, the molding process using a corrugator as shown in FIG. 20 becomes easy.

The cross-sectional center line is a center line perpendicular to the cross section in the direction perpendicular to the axis of the unit corrugated groove in which the corrugated core sheet is formed into a meandering shape.
It is shown at the cross-sectional center line 02 in FIGS. 0 to 13.

In addition, the corrugated groove center line is the vertical center line corresponding to the neutral position of the center line of the entire cross section in the unit corrugated groove, and is
It is shown on the corrugated groove center line 01 in FIG.

14 to 25 show 10th to 33rd embodiments, which are corrugated groove cross-sectional shapes of corrugated core sheets of the present invention, and each of the above figures a shows an initial embodiment, and each of the above Figure b shows an embodiment after modification of each figure a.

Each figure a of FIG. 14 to FIG. 17 shows that the corrugated groove is formed with a flat surface 51 that is horizontal near the top and bottom, and each of the above-mentioned figures b shows the corrugated groove. Each of the tenth and eleventh embodiments shown in FIGS. 14a and 14b has a cross section 60 of both side walls of the corrugated groove. , 70 are straight lines; in the 12th and 13th embodiments shown in FIGS. 15a and 15b, the cross sections 63 and 73 of both side walls of the corrugated groove are continuous curved lines; and in the 14th and 15th embodiments shown in FIGS. In the embodiment, the cross sections 64 and 74 of both side walls of the corrugated groove are composite linear lines of curves and straight lines, and in the 16th and 17th embodiments of FIGS. It is characterized by being obtained as a curved line that curves inward toward 02.

Each figure a in FIGS. 18 to 21 shows each mountain having a curved surface that is discontinuous with the cross-sectional line of both side walls near the top and bottom of each corrugated groove, with the cross-sectional center line 02 serving as the axis of symmetry. , a valley bent part 33 is provided, and each of the above figures b shows a curved surface that is substantially discontinuous with the cross-sectional line of both side walls near the top and bottom of the corrugated groove, and the cross-sectional center line 02 is the axis of symmetry. In the 18th and 19th embodiments shown in FIGS. 18a and 18b, the cross sections 60 and 70 of both side walls of the corrugated groove are linear and curved. In the 20th and 21st embodiments shown in Figs. 19a and 19b, the cross sections 63 and 73 of both side walls of the corrugated groove are continuous curved lines, and in the 22nd and 23rd embodiments of Figs. 20a and 20b, the cross sections of both side walls of the corrugated groove are 64 and 74 are composite lines of curves and straight lines, and the 23 and 25th embodiments in FIGS. 21a and b are curved lines in which the cross sections 62 and 72 of both side walls of the corrugated groove curve inward toward the cross-sectional center line 02. It is characterized by being obtained as follows.

Each figure a in FIGS. 22 to 25 shows the curved surfaces that are substantially continuous with the cross-sectional line of both side walls near the top and bottom of the corrugated groove, with the cross-sectional center line 02 serving as the axis of symmetry. , a valley bent part 34 is provided, and each of the above figures b shows the top of the corrugated groove,
In the vicinity of the bottom, each mountain and valley bent part 34' is provided, which has a curved surface that is substantially continuous with the line shape of both side walls so that the cross-sectional center line 02 does not become the axis of symmetry. In the 26th and 27th embodiments, the corrugated groove both side wall sections 60 and 70 are linear, and in the 28th and 29th embodiments of Fig. 23a and 23b, the corrugated groove both side wall sections 64 and 74 are linear. The 30th and 31st embodiments shown in FIGS. 24a and 24b are continuous curved lines, and the cross sections 64 and 74 of both side walls of the corrugated groove are synthetic linears in which curves and straight lines are formed, and the 32nd and 33rd embodiments shown in FIGS. 25a and 25b are The embodiment is characterized in that the cross sections 62, 72 of both side walls of the corrugated groove are curved linearly curved inward toward the center line of the cross section.

Using a core sheet made of a material such as paper that has a relatively low stretching rate due to in-plane tensile force, predetermined peak and valley folds 30 and 40 are formed as shown in the development diagram, FIG. 4b, etc.
When the corrugated core sheet is formed using rollers 05-05' and 06-06' as shown in FIG. 36 so as to have the corrugated cross section shown in FIGS. In many cases, it causes tearing and damage at various parts of the groove, or else it starts deforming immediately after it is released from the roller, and the above cross-sectional shape of each figure b shown in Figs. 14 to 25 is not perfect. It has the disadvantage of shifting to In other words, it is difficult to form the corrugated core sheet of the corrugated groove in each figure a shown in FIGS. 14 to 25 into its shape with paper or the like without damaging it, or it is difficult to maintain its shape stably. It's not easy.

However, the 14th grade obtained using a material that has a relatively high elongation rate due to in-plane tensile force or a material that has high shape retention properties due to plastic deformation, such as a thermoplastic plastic sheet or an ordinary metal sheet.
The corrugated core sheet of each figure a shown in FIGS. By providing the curved portion, a sufficient bonding area with the liner can be obtained, and rollers 05-05', 0 such as the 44th and 45th embodiments
6-06' allows easy molding, and the cross-sectional shape of the molded corrugated groove can be stably maintained.

It should be noted that it is possible to easily come up with many other modifications, such as those obtained by appropriately combining the above embodiments, and any of them are effective for the present invention.

FIGS. 26 to 29 show 34th to 37th embodiments of the corrugated groove cross-section of the corrugated core sheet of the present invention, and each of the above embodiments has a corrugated groove at the top and bottom of the corrugated core sheet of the present invention. Each peak and valley bent portion 30, 40 is formed in a single linear shape, and in the 34th embodiment shown in FIG. , the thirty-fifth embodiment in FIG.
The 36th embodiment in FIG. 28 is a cross section 6 of both side walls of a corrugated groove.
4,74 is a composite line of straight lines and curves,
37 Example shows cross sections 61 and 7 of both side walls of a corrugated groove.
1 is characterized in that it is obtained as a curved line that curves in the same direction.

In the 34th embodiment shown in FIG. 26, the shape of the corrugated groove is easily maintained stably, so that the in-plane compressive strength and hardness of the composite corrugated body are relatively high. Roller 05-
Corrugate top and bottom parts 3 that become acute angles in corrugate molding using 05', 06-06', etc.
It has the disadvantage that it is somewhat difficult to form 0.40.

35, 36 of Fig. 25, Fig. 26, Fig. 27,
In the 37th embodiment, the above-mentioned out-of-plane compressive strength and hardness are relatively reduced, but it has the advantage of reducing impact fracture. Since the grooves 73, 64, and 74 are similar to the groove-shaped tooth patterns 80, 81, and 82 of the rollers, there is an advantage that corrugating can be carried out without difficulty.

It should be noted that it is possible to easily come up with many other modifications, such as those obtained by appropriately combining the above embodiments, and any of them are effective for the present invention.

Figures 30 to 35 show the 38th to 38th embodiments of the present invention.
45 is a partial perspective view showing a corrugated core sheet of a reinforced composite corrugated body according to Example 45. FIG.

The corrugated core sheet of the present invention, which is the 38th embodiment, has two peak bent portions 30 and valley bent portions 40 formed in a zigzag shape in the axial direction near the top and bottom of the corrugated groove. , those 2
A zigzag-shaped horizontal flat surface 51 provided between the bent portions of the strips has depressions or ridges in the direction perpendicular to the corrugated groove, and ridges or depressions on both side walls of the groove continuous thereto in the direction of the corrugated groove. It is set up in multiple stages.

In the corrugated core sheet of the present invention, which is the 39th embodiment, near the top and bottom of the corrugated groove,
Two mountain bent portions 30 and a valley bent portion 40 are formed meandering in the axial direction, and a meandering horizontal flat surface 5 is provided between these two bent portions.
1, there are depressions or depressions in the direction perpendicular to the corrugated groove, and continuous depressions or depressions are provided in multiple stages in the groove direction on both side walls of the groove.

The corrugated core sheet of the present invention, which is the 40th embodiment, has wrinkle-like depressions in the meandering curved surfaces 34 and 44 provided near the top and bottom of the corrugated groove in the direction intersecting the corrugated groove. 47
Alternatively, a protuberance 37 is formed.

The corrugated core sheet of the present invention, which is the 41st embodiment, has embossed depressions 48 or ridges in a meandering horizontal flat surface 51 provided near the top and bottom of the corrugated groove in a direction intersecting the corrugated groove. 38 is formed.

In the corrugated core sheet of the present invention, which is the 42nd embodiment, both sides of the meandering horizontal flat portion 51 provided near the top and bottom of the corrugated groove are substantially parallel to the flat surface 51. The elongated depressions 49 and ridges 39 are formed in multiple stages in the direction of the corrugated groove.

The corrugated core sheet of the present invention, which is the 43rd embodiment, has meandering grooves formed approximately in the center of the meandering curved surfaces 49' and 39' provided near the top and bottom of the corrugated grooves. It is caused by the formation of depressions and bulges.

Although several embodiments have been shown above, appropriate combinations thereof and various other modifications and improvements are possible, and other embodiments can be easily conceived, all of which are effective for the present invention.

Although not shown, a reinforced composite corrugate body in which the corrugate core sheet of the present invention and a liner sheet on one side are laminated and integrated, or the corrugate core sheet and a liner sheet bent into a corrugated shape are combined. The above-mentioned corrugated body bonded together is also effective in the present invention.

Note that the material of each sheet of the reinforced composite corrugate body according to the present invention is not limited to paper;
Appropriate combinations of wood plates, metal sheets, synthetic resin sheets, glass sheets, woven fabrics, various nonwoven fabrics, and other various materials are also effective in the present invention.

In addition, the corrugated core sheet of the present invention has a certain degree of rigidity against out-of-plane deformation near the top and bottom of the corrugated groove and on both side walls, and does not easily lose its shape at each peak, valley, bend, etc. If not,
Even if the liner sheet itself is not laminated, the out-of-plane compressive strength and the out-of-plane bending strength in two directions can be obtained which are significantly larger than that of a normal corrugated sheet.
Therefore, the corrugated core sheet of the present invention can provide a new type of corrugated panel with excellent cost-effectiveness as a substitute for various conventional corrugated panels.

There are various methods for manufacturing the reinforced composite corrugated body of the invention described above, and the method of manufacturing the reinforced composite corrugated body of the invention shown in FIGS. 36 and 37 corresponds to plastically deformable materials such as paper, plastic sheets, and metal sheets. The 44th and 45th embodiments of a pair of corrugating rollers, ie, corrugators, are shown in broken perspective views, and FIGS. 38 and 39 show the 46th embodiment of the guide and its peripheral line according to the present invention. No. 47
A perspective view of an example is shown.

A pair of rollers 05-05' used as corrugators for the corrugated core sheet of the present invention, which is the 44th embodiment and shown in FIG. Type 80
are arranged in multiple stages in the circumferential direction, and the tops of the teeth form a smoothly meandering curved surface, which prevents the core sheet from shrinking in the width direction or forming predetermined peaks and valleys during corrugating. Bending can be done smoothly and reliably without damaging the sheet.
The groove-shaped teeth 80 of the rollers 05 and 05' alternately mesh like gears as the rollers rotate, thereby making it possible to feed the corrugated core sheet of the seventh embodiment at high speed.

A pair of rollers 06-06' used as corrugators for the corrugated core sheet of the present invention, which is the 45th embodiment and shown in FIG. The groove-shaped tooth molds 81 are arranged in multiple stages in the axial direction, and the groove-shaped tooth molds 81 of the rollers 06 and 06' are mutually incorporated into the grooves of the mating rollers as the rollers rotate. The corrugated core sheet of the example can be fed reliably and at high speed.

In the 44th embodiment, a corrugated groove is machined perpendicular to the feeding direction of the core sheet, and in the 45th embodiment, a corrugated groove is machined in the feeding direction, but the latter roller has a relatively more flexible cross section than the former roller. Can be molded into corrugated grooves. It should be noted that the illustrated groove tooth shapes 80 and 81 are only limited examples, and there are many other variations, all of which are effective for the present invention.

The guide 07 of the 46th embodiment has a function of supporting the forming process of the corrugated core sheet 10 of the present invention by the rollers 05-05' of the 44th embodiment. Because the sheet is reduced by several percent in the direction perpendicular to the supply, a local tensile force acts only on the outer edge of the sheet, and the rotation guide 07 is provided to prevent tensile damage that occurs as a result. Since the flat core sheet 10' is bent or curved substantially symmetrically, tensile stress is uniformly distributed over its entire width, and corrugating can be performed reliably and at high speed without causing the above-mentioned damage.

The guide 08 of the 47th embodiment has a function of supporting the forming process of the corrugated core sheet 10 of the present invention by the rollers 06-06' of the 45th embodiment. 10 is not supplied as is, but is corrugated in a conventional manner using guides 06-06' and then supplied. Guides 06-06' of the invention are provided to prevent damage caused by tension on the outer width edges. The fixed guides are a pair of flat plates with a corrugated wave-like gap whose amplitude increases as it goes downstream, and the flat plate is bent or curved symmetrically from the center of the flat plate, so the flat core sheet 10' or corrugated core Since the tensile force is uniformly distributed over the entire width of the sheet 10, it is possible to corrugate the sheet 10 reliably and at high speed without causing the above-mentioned damage.

FIG. 39a is a perspective view showing the guide 08 and its surroundings, and FIG. 39b, c, and d are views of the guide 08.
8 cross-sectional developed views S1-S1, S2-S2, S3
-S3.

Note that the lattices on the center sheet 10' around the guide shown in the 46th embodiment and the lattice on the guide shown in the 47th embodiment are used for convenience especially to express the three-dimensional space. It is a design.

Although not shown, in the guide 06-06' shown in the 47th embodiment, the corrugated wave-like gap may be replaced with a flat plate-like gap, and a quadratic curved surface may be formed that is symmetrically bent or curved from the flat central part. The flat core sheet 107 is directly supplied to the corrugating rollers 06-06' of the 45th embodiment or the rollers 05-05' of the 16th embodiment through a new guide formed by the corrugated core sheet of the present invention. It is possible to obtain

FIG. 40 shows a production line for a corrugated core sheet according to the present invention, which is a 48th embodiment and is provided with corrugating rollers 05-05' and guides 07, 07'.

The corrugating roller 05-05' is the third
As a modification of the same roller 05-05' of the 44th embodiment shown in FIGS. 6 and 38, groove-shaped teeth 82 meandering in the axial spiral direction are provided in multiple stages on the roller circumferential surface, and a flat plate is further provided. The axis of the roller is set so as to be inclined with respect to the feeding direction of the core sheet 10', and therefore, the flat core sheet 1 cannot be avoided during the corrugating process of the present invention.
0' can be smoothly contracted in the width direction without any resistance, and the bending resistance, which cannot be ignored, can be greatly reduced when forming the predetermined peak and valley folds 34, 44 in the flat core sheet 10'. This has the effect of preventing the sheet 10' from being damaged and at the same time facilitating the formation of folded portions by deep folding. Moreover, the rotation guide 07 is the rotation guide 07 of the 46th embodiment.
Although it is a tapered cylinder having almost the same function as the guide 07, it is also possible to replace it with a gap type fixed guide with the taper angle described above.
are a pair of rollers, which are used to hold the flat core sheet 10' horizontally.

In addition, there are various methods for manufacturing the corrugated core sheet according to the present invention, such as the press method suitable for a wide range of materials, the blow molding method and vacuum forming method suitable for processing plastic sheets, and the extrusion molding method and injection molding method also suitable for plastic sheets. Molding method,
Casting methods suitable for metals, thick plating methods, thick vapor deposition methods, etc. are all effective in the manufacturing method of the present invention, and appropriate combinations of the above-mentioned methods are also effective in the present invention.

<<Effects of the Invention>> As described above, the reinforced composite corrugated body according to the present invention has a corrugated core sheet in which meandering peaks and valleys are formed near the top and bottom of the corrugated core sheet. and liner sheet are integrated, and compared to conventional composite corrugated bodies, both out-of-plane compressive strength, bending strength, and in-plane two-way compressive strength are significantly improved, so it can be used as packaging materials such as cardboard or as sliding doors. It can exhibit excellent properties as a building material such as.

Specifically, a new cardboard according to the seventh embodiment of the present invention was obtained, but when compared with conventional cardboard of the same paper quality and size, the weight increased by 5 to 7% per unit area, but the out-of-plane bending strength was The results showed an improvement of 200-250%. Assuming that the above-mentioned material strength is equivalent to that of conventional cardboard, the material cost of the new cardboard will be reduced to 70 to 75% of that of conventional cardboard. In addition, the compressive strength in the direction perpendicular to the corrugated groove is particularly improved, compared to the conventional product.
The result was an improvement of 300-400%.

In addition, it is also effective to use the corrugated core sheet according to the present invention alone, and the out-of-plane bending strength in the direction perpendicular to the corrugated grooves is improved, so it can be used as a substitute for various conventional corrugated panels, sea cucumber boards, etc. We were able to provide a new corrugated panel with improved performance.

In the method for manufacturing a reinforced composite corrugate body of the present invention, high-speed and reliable corrugation processing that is almost equivalent to that of conventional composite corrugate bodies is possible using a pair of rollers.
The molding process of the corrugated core sheet of corrugated cardboard using rollers and guides as in Example 18 can be carried out by making use of most of the existing lines for conventional corrugated cardboard, so the development and equipment costs can be reduced. It is sufficiently compressed and greatly contributes to reducing product costs.

As described above, if the manufacturing method of the present invention is used,
It has the advantage of being able to mass produce high-yield products at high speed, using manufacturing equipment that is not much different from that of conventional products, and resulting in low-cost products.

[Brief explanation of the drawing]

1 to 35 show the first to 43rd embodiments of the reinforced composite corrugated body of the present invention, first of all, FIGS.
FIG. 9a is a cutaway perspective view of each embodiment, and each FIG. 9b is a developed view schematically showing the position corresponding to the folded portion of the corrugated core sheet. Next, FIGS. 10 to 13 are detailed perspective sectional views or detailed sectional views of the 4th, 3rd, 7th, and 8th embodiments, and FIGS. 14 to 35 are 10th to 33rd embodiments. FIG. 26 to 29 are perspective partial views of the 34th to 37th embodiments, and FIGS. 30 to 35 are perspective partial views of the 34th to 37th embodiments.
FIGS. 38 to 43 are perspective partial views of Examples 38 to 43, and FIGS.
FIG. 40 shows the 44th to 48th embodiments of the method for manufacturing a reinforced composite corrugated body of the present invention, and the 3rd embodiment
6 and 37 are perspective views of broken parts of the 44th and 48th embodiments, FIGS. 38 and 39a are perspective views, and FIGS. 39b, c, and d are developed cross-sectional views. , FIG. 40 is a perspective view of the 44th embodiment. 00...Reinforced composite corrugated body, 10...Corrugate core sheet, 10'...Flat core sheet,
20... Liner sheet, 30, 30', 31, 3
2, 33, 34, 34', 35, 36... mountain fold, 37, 38, 39, 39'... uplift, 40,
40', 41, 42, 43, 44, 45, 46...
...Valley bend, 47, 48, 49, 49'...cave-down,
50, 51, 52...Flat surface, 60, 70, 6
1, 71, 62, 72, 63, 73, 64, 74
... Side wall part, 80, 81, 82 ... Groove tooth shape, 0
1...Corrugate groove center line, 02...Cross section center line, 03...Thick solid line, 04...Thick broken line, 05,0
5', 06, 06'...Roller, 07, 07', 0
7″...Guide, 09...Gap.

Claims (1)

[Scope of Claims] 1. A corrugated core sheet formed by integrating a corrugated core sheet and a liner sheet in which each peak and valley bent portion is formed near the top and bottom of a corrugated groove so as to intersect with the axial direction of the groove. A reinforced composite corrugated body featuring: 2 Near the top and bottom of the corrugated groove,
2. The reinforced composite corrugated body according to claim 1, wherein each of the above-mentioned peaks and valleys is formed continuously and has a meandering shape in the direction of the groove axis. 3. Reinforcement according to claim 2, characterized in that each mountain and valley bent portion continuously formed in a meandering manner near the top and bottom of the corrugated groove is provided as a single thread or a plurality of threads. Composite corrugated body. 4. Claim 2, characterized in that it is obtained by forming a plurality of the above-mentioned peaks and valleys in the vicinity of the top and bottom of the corrugated groove in parallel and substantially parallel to each other. term or third
Reinforced composite corrugated body as described in section. 5. Claim 2, characterized in that it is obtained by forming a plurality of the above-mentioned peaks and valleys near the top and bottom of the corrugated groove in parallel and substantially line-symmetrical to each other. The reinforced composite corrugated body according to item 1 or 3. 6. Claim 2 or 6, characterized in that the cross-sections of the bent portions of the peaks and valleys are formed in an inverted V-shape and a V-shape near the top and bottom of the corrugated groove, respectively. The reinforced composite corrugated body according to item 3. 7. Claims characterized in that near the top and bottom of the corrugated groove, the cross-sections of the bent portions of the peaks and valleys are curved to form an inverted U-shape, a U-shape, or a circular arc shape. Section 2 or 3
Reinforced composite corrugated body as described in section. 8 A flat shape in which the band-shaped portion sandwiched by the plurality of peaks and valley bends provided at the top and bottom of the corrugated groove is inclined, or a curved shape that does not have a cross-sectional center line serving as an axis of symmetry. Claim 4 characterized in that it is formed so that
6. The reinforced composite corrugated body according to item 5. 9 In the cross section of the corrugated groove in the direction perpendicular to the axis, both side wall portions of the corrugated groove are moved in parallel or curved in the direction from the corrugated groove center line to the cross-sectional center line, and the cross sections of the top and bottom of the groove are horizontal. Claims 2 or 3 or 4 or 5 or The reinforced composite corrugated body according to item 7 or 8. 10. Claims 2 or 3 or 10, characterized in that depressions and protuberances are provided near the top and bottom of the corrugated groove so as to be substantially perpendicular to the respective peaks and valley bends. The reinforced composite corrugated body according to item 4 or 5 or 6 or 7 or 8 or 9. 11. Claims 2 or 3, characterized in that depressions and protuberances are provided near the top and bottom of the corrugated groove so as to be substantially parallel to the bent portions of the peaks and valleys. or the reinforced composite corrugated body according to item 4, item 5, item 6, item 7, item 8, item 9, or item 10. 12 Claims 1 or 2 or 3 or 4 or 5 or 4 or 5, characterized in that they are obtained by integrating a liner sheet on one or both sides of the corrugated core sheet. The reinforced composite corrugated body according to item 6 or 7 or 8 or 9 or 10 or 11. 13. The reinforced composite corrugated body according to claim 12, characterized in that the corrugated sheet is integrated with a flat or corrugated liner sheet. 14. It is characterized by being obtained by integrating a corrugated core sheet and a liner sheet, each of which has continuous peak and valley bent portions formed in a meandering manner in the direction of the groove near the top and bottom of the corrugated groove. In the method for manufacturing a reinforced composite corrugated body,
A reinforced composite corrugated body characterized in that the corrugated core sheet of the present invention is obtained by corrugating using a pair of rollers each having grooved tooth patterns in a meandering or beaded shape in multiple stages on the circumferential surface. Production method. 15. Reinforcement according to claim 14, characterized in that the pair of rollers in which the groove-shaped tooth patterns provided in the axial direction of the circumferential surface are arranged in multiple stages in the circumferential direction are used as a corrugator for the core sheet. A method for manufacturing a composite corrugated body. 16. The method according to claim 14, characterized in that the pair of rollers in which the groove tooth patterns provided in the circumferential direction of the circumferential surface are arranged in multiple stages in the axial direction are used as a corrugator for the core sheet. A method for manufacturing a reinforced composite corrugated body. 17 A bent or curved guide is provided immediately before the corrugating by the rollers,
The method for manufacturing a reinforced composite corrugated body according to claim 14, characterized in that the entire width of the core sheet is deformed into a bent or curved surface in the primary or secondary direction and then supplied to the rollers. .