JPH11342551A - Corrugated fiberboard flat plate, its production and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a corrugated fiberboard flat plate comprising a corrugated fiberboard at a low cost in which heat insulating properties and soundproofing properties are excellent and also the flat plate is lightweight and strength is excellent. SOLUTION: A laminate 5 is formed by laminating and joining a plurality of corrugated fiberboards 1 in which a liner 1b is stuck on at least one side of a corrugated plate 1a. The laminate 5 is cut into a plurality of pieces along a cutting line (b) orthogonal to the ridge (a) of the corrugated plate 1a and laminated small pieces 7 are formed. A corrugated fiberboard 9 having long length and a flat shape is formed by joining the top faces 71 of a plurality of laminated small pieces 7 to the bottom faces 72 thereof. A raw material 12 of the corrugated fiberboard is formed by bonding a sheet 11a or 11b consisting of paper material on at least one side of the corrugated fiberboard 9. The raw material 12 of the corrugated fiberboard plate is cut into a prescribed dimension to obtain a corrugated fiberboard flat plate 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a corrugated board made of corrugated cardboard which is excellent in heat insulation and soundproofness, and is lightweight and excellent in strength, and a corrugated board flat plate manufactured by using the same. It is related to tatami mats and architectural materials.

[0002]

2. Description of the Related Art The present applicant has previously proposed an apparatus and a method for continuously manufacturing a honeycomb structure used for furniture and building materials (Japanese Patent Application No. 9-359535).
issue). This honeycomb structure has the advantages of being lightweight, having extremely high compressive strength in the direction of the eyes, and being excellent in heat insulation and soundproofing, but its manufacturing apparatus is slightly complicated.

[0003] That is, a honeycomb core raw material is prepared by laminating a large number of paper materials forming honeycomb eyes, and the honeycomb is cut in a direction perpendicular to the eyes with the eyes closed to form a plurality of honeycombs. The top surface and the bottom surface of the single body are sequentially joined and integrated to form a long honeycomb core, and a sheet is attached to a cut surface (front and back) of the honeycomb core to obtain a honeycomb structure. When the honeycomb is cut into a single body, the honeycomb is cut with its eyes closed, so that a large cutting force is required. For this reason, the cutting is performed using a guillotine cutter having a single blade having a larger cutting force than the saw blade. However, when a guillotine cutter is used, the cut surface (glued surface) becomes smooth, so that the gluing is deteriorated, which is inconvenient in reliably joining and integrating the sheets. Therefore, the glued surfaces on the front and back of the honeycomb single body are roughened by the rough surface forming machine in a state where the eyes of the honeycomb single body are widened by the expansion machine, and a rough surface forming machine and an expansion machine for that purpose are required.

The present invention uses a corrugated cardboard in place of the above-mentioned honeycomb core, securely and firmly joins and integrates the sheets without the need for roughening, and achieves the same or better than the case of using a honeycomb core. An object of the present invention is to provide a corrugated board having high performance at low cost. The other purpose is to use this cardboard flat board, which is lightweight and excellent in heat insulation effect, and is used for partitioning tatami mats, restaurants, offices, etc.
Another object is to provide a building material that can be optimally used for an outer wall of a temporary house or the like.

[0005]

According to a first aspect of the present invention, there is provided a method for manufacturing a flat corrugated cardboard, comprising the steps of: laminating a plurality of corrugated boards having a liner fixed to at least one surface of a corrugated board; The laminated body is cut into a plurality of pieces along a cutting line orthogonal to the ridge line of the corrugated plate to form a laminated piece, and the top and bottom surfaces of the plurality of laminated pieces are joined to form a long and flat shape. Make corrugated board material of
A sheet made of a paper material is bonded to at least one side of the corrugated board to form a corrugated board raw material, and the corrugated board raw material is cut into predetermined dimensions to produce a corrugated board flat plate. Here, the corrugated plate is a plate material that is bent at a constant period to form the corrugated cardboard eyes, and includes a U-shaped (or sine waveform), a V-shaped, and a trapezoidal one.

According to the above-described manufacturing method, when the laminated body is cut along a cutting line orthogonal to the ridge line of the corrugated plate to produce a laminated small piece, not a guillotine cutter having a single blade but a tip of a saw blade. A circular saw or band saw having a large number of teeth protruding in rows in the width direction, or a so-called push saw having teeth protruding outward in the width direction on the inner side of the teeth of the saw blade can be used. . That is, since the laminated body is formed by laminating corrugated cardboard with open eyes, a large force is not required at the time of cutting, so that the circular saw or the like can be used. For this reason, the cut surface of the laminated piece (which becomes the glued surface of the sheet) is moderately roughened when the laminated body is cut, so that the rough cut surface is properly glued, and the sheet is securely and firmly bonded and integrated. It is made. Therefore, there is no need to perform rough surface processing using a rough surface forming machine or an expansion machine as in the previously proposed ones. Therefore, a corrugated board having the same or better performance than the case of using a honeycomb core which is excellent in heat insulation and soundproofness and is lightweight and excellent in strength can be continuously obtained at low cost.

According to a second aspect of the present invention, there is provided an apparatus for manufacturing a corrugated board, wherein a corrugated board having a liner fixed to at least one surface thereof is laminated and joined to form a laminate. A laminated piece forming machine that cuts into multiple pieces along a cutting line perpendicular to the ridgeline of the corrugated plate to produce laminated pieces, and a long and flat corrugated board material that joins the top and bottom surfaces of the laminated pieces. A corrugated board material forming machine, a corrugated board material forming machine for bonding a sheet made of paper to at least one side of the corrugated board material to form a corrugated board raw material, and a corrugated board formed by cutting the corrugated board material into predetermined dimensions. Equipped with a cutting machine to make a flat plate.

By using the above-described manufacturing apparatus, the manufacturing method of claim 1 can be easily implemented.

According to the third aspect of the present invention, there is provided a flat corrugated cardboard.
A corrugated board having a liner fixed to at least one surface of the corrugated board is laminated and joined, and is made of a corrugated board material having front and back surfaces orthogonal to the ridge line of the corrugated board.

The corrugated board is excellent in heat insulation and sound insulation, and is lightweight and excellent in strength, so that it can be used as a core material for furniture such as tatami mats, partitions and outer walls, pallets for receiving cargo, tables and counters, and storage shelves. It is optimally used as a core material for racks of audio equipment and OA equipment, a cushioning material for packaging, a corner material for packaging, a filter in which titanium oxide or activated carbon is loaded and used, and an element of a heat exchanger.

A corrugated board according to a fourth aspect of the present invention comprises a corrugated board having a plurality of corrugated boards having a liner fixed to at least one surface of the corrugated board, which are laminated and joined, and a corrugated board having front and back surfaces orthogonal to a ridge line of the corrugated board. Eye height is 8 ~ 1
Both ends of the corrugated plate facing the front and back surfaces are bent in a direction along the front and back surfaces, and the length of the bent portion is set to 1.0 to 5.0 times the thickness of the corrugated plate. ing.

According to the above-mentioned corrugated cardboard flat plate, since the bent portions in the front and back direction are formed at both ends of the front and back surfaces orthogonal to the ridge line of the corrugated plate, the mechanical strength is enhanced. In addition, when the sheet is bonded to both or one of the front and back surfaces, the bent area increases the bonding area, so that the bonding strength of the sheet is enhanced. Also, eye height is 8-15mm
By using the corrugated board of the above, a corrugated board of a predetermined size can be obtained by reducing the number of used corrugated boards. That is, since the eye height of a normal corrugated cardboard is 1.1 to 4.8 mm, it is necessary to use a large number of corrugated cardboards in order to obtain a predetermined size of a corrugated cardboard using this.
The overall weight increases. Further, there is a problem from the viewpoint of resource saving. However, the use of corrugated cardboard with a high eye height (generally referred to as the "on-corrugated cardboard") as described above makes it possible to obtain a corrugated cardboard plate of a predetermined size with a small number of sheets. In addition, workability at the time of manufacturing is also improved. At this time, the height of the corrugated plate is 8
mm, as in the case of normal cardboard,
Many corrugated boards are required to make a corrugated board of a predetermined size. On the other hand, when the eye height of the corrugated plate exceeds 15 mm, the weight is reduced, but the strength is insufficient. Therefore, the eye height of the corrugated plate is in the above range.

Further, by setting the length of the bent portion to be 1.0 to 5.0 times the thickness of the corrugated plate, the mechanical strength of the corrugated cardboard plate is enhanced, and the sheet is bent to the bent portion. Bonding can be performed reliably. At this time, the bent portion has a thickness of 1..
If the ratio is less than 0 times, sufficient mechanical strength cannot be obtained, and the adhesive strength of the sheet becomes insufficient. On the other hand, if it exceeds 5.0 times, the bent portion cannot be formed simply and efficiently. That is, the cardboard flat plate is formed by cutting the laminate with a saw to produce a plurality of laminated pieces, and joining the top and bottom surfaces of the plurality of laminated pieces. Therefore, it is preferable to form the bent portion by using the margin left on the cut end surface of the laminated small piece when cutting with the saw because the bent portion is formed at the time of cutting without a separate step, which is preferable. But,
If the bent portion exceeds 5.0 times the thickness of the corrugated plate, it is difficult to form the bent portion at the same time using the saw. Therefore, in order to efficiently form the bent portion using the manufacturing process of the corrugated board, the length of the bent portion is set in the above range. Further, since the above-mentioned corrugated cardboard has particularly excellent mechanical strength, it can be more optimally used as a core material of the above-mentioned cargo receiving pallet, furniture and rack.

The tatami mats according to the fifth and sixth aspects use one of the cardboard flat plates according to the third or fourth aspect, or a plurality of sheets that are superimposed in a front-to-back direction via a sheet made of a paper material, and have a surface thereof. Then, a single-sided corrugated cardboard having a liner fixed to the back side of a corrugated plate having an eye height of 0.5 to 3 mm or a tatami mat is joined or sewn. The pitch of the corrugated board of the single-faced cardboard is 1.2 to 2.4 times the eye height. By setting the eye height in the above range, the feel is improved.

[0015] These tatami mats are lightweight and convenient to carry, and also have an excellent heat insulating effect. In addition, when a tatami mat is sewn on the surface of a corrugated cardboard plate to form a tatami mat, particularly when two or more corrugated cardboard plates are used, the sheets provided on both the front and back surfaces of the corrugated cardboard plate or one of them are used for sewing the tatami mat with threads , The tatami surface can be securely and firmly sewn.

According to a seventh aspect of the present invention, there is provided a building material using one of the cardboard flat plates according to the third or fourth aspect, or a plurality of sheets superposed in a front-to-back direction via a sheet made of a paper material.

This partition is similar to the case of the above tatami mat,
Since it is lightweight, it is easy to carry and has an excellent heat insulating effect, so that it is useful as, for example, a room partition in a restaurant or an office, or an outer wall of a temporary house. In addition, when used for these, nails and hooks are attached to the partition, but especially when two or more cardboard flat plates are used, each sheet becomes caught by nails or hooks. Can be mounted firmly.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2 schematically show an entire apparatus 100 for continuously manufacturing corrugated cardboard flat plates. In each drawing, the manufacturing apparatus 100 is illustrated as two
It is described separately. The apparatus 100 includes, from the left side of FIG. 1, a corrugated cardboard forming machine 2 for producing a long corrugated cardboard 1, a cutter 3 having a blade portion 31 for cutting the corrugated cardboard 1 into a predetermined length and an actuator 32, and a cut corrugated cardboard 1. A transfer gluing machine 4 for gluing the upper surface of the corrugated plate 1a while transporting, and a laminate forming machine 6 for forming a laminate 5 by laminating and joining a plurality of cardboards 1 to which a liner 1b is joined.
It has. The cutter 31 may be a rotary cutter.

The corrugated board forming machine 2 has a first roll 21 on which a base paper 1c for a corrugated plate 1a is wound, and a pair of upper and lower protrusions having a plurality of protrusions 22a forming the corrugated plate 1a protruding on the outer periphery. Rolls 22, 22 and formed corrugated plate 1a
Gluing machine 23 for adhering glue to the lower surface side, second roll 24 around which liner 1b is wound, and press-contact roll for supplying liner 1b to be fed out to the lower surface side of corrugated plate 1a and bonding by gluing. 25. The first gluing machine 23 has a tank 26 loaded with glue C, a gluing roller 27 for transferring the glue C to the lower surface of the corrugated plate 1a, and a first gluing machine 23. And a roller 28 for transferring the image to the transfer roller 27. In the corrugated board forming machine 2, the up-down relationship between the base paper 1c for the corrugated board 1a and the liner 1b is reversed so that the corrugated board 1
The liner 1b may be adhered to the upper surface of a.

The transfer gluing machine 4 is a conveyor 4 on which the corrugated cardboard 1 cut by the cutter 3 is placed and transferred backward.
1 and a second gluing machine 42 disposed on the upper side of the corrugated board 1a for applying glue to the upper surface of the corrugated board 1a. Glue the top surface. At this time, a so-called double-sided liner type may be joined to this surface by bonding a second liner formed in advance to the same size as the corrugated cardboard 1 cut by the cutter 3, in which case the upper surface of the second liner may be further provided. Apply glue. The second gluing machine 42 includes a tank 43 loaded with the glue C, a gluing roller 44 for transferring the glue C to the upper surface of the corrugated plate 1a, a roll 45 disposed in the tank 43a, and a glue C from the roll 45. Is transferred to the gluing roller 44.

The laminate forming machine 6 includes an elevator 60 having a vertical reciprocating cylinder, a plate-like first stopper 61 disposed above the elevator 60, and a plate-like first stopper 61. The second stopper 62, the cardboard 1 on the conveyor 41 is extruded onto the elevating platform 60, and is brought into contact with the first stopper 61, and the vertical pusher 63 for aligning the ends thereof, and the cardboard 1 placed on the elevating platform 60 in the horizontal direction. A lateral pusher (not shown) is provided that pushes in a direction (perpendicular to the plane of FIG. 1) and contacts the second stopper 62 to align the side edges. Further, a first dryer 66 having a conveyor 64 is provided behind the elevator 60, and a transporter 67 which receives the laminated body 5 dried here by a robot (not shown) and transfers it to the next step of FIG.
Are provided.

In FIG. 1, the first and second rolls 2
A plurality of guide rollers 18 are provided on the transfer path of the base paper 1c and the liner 1a from 1, 24 to the cutter 3. In addition, a pair of holding rolls 19, 19 for holding the cardboard 1 from above and below during cutting by the cutter 3 are provided on the front side of the cutter 3.

Further, as shown in FIG. 2 following FIG. 1, the manufacturing apparatus 100 cuts the laminate 5 conveyed by the conveyer 67 into a cutting line orthogonal to the ridge line a of the corrugated plate 1a of the cardboard 1. A lamination piece forming machine 8 that cuts a plurality of lamination pieces 7 along the line b, and joins the top face 71 and the bottom face 72 that are both end faces in the lamination direction of the plurality of lamination pieces 7 to form a long and flat shape. A corrugated board material forming machine 10 for producing a corrugated board material 9, a first corrugated board material 9 made of paper on both front and back sides in the direction of the eyes
And a corrugated board raw material forming machine 13 for bonding the second sheets 11a and 11b with glue to form a corrugated board raw material 12, and a cutting machine for cutting the corrugated board raw material 12 into a predetermined lengthwise direction to form a corrugated board flat plate 14. 15 are provided.

In the embodiment shown in FIG. 1, a circular saw (rotary cutter) 82 having a motor 81 used for ordinary cutting is used as the laminated small piece forming machine 8. As shown in FIG. 3, the circular saw 82 has a large number of teeth 84 protruding in a row in the width direction on the tip side of a saw blade 83. A chip saw 85 as shown in FIGS. 4A and 4B can also be used as the lamination piece forming machine 8 (see JP-A-10-337687). This tip saw 85
Forms a plurality of tip seats 87 on the outer periphery of the saw blade 86,
A tip 88 having a blade thickness larger than the thickness of the saw blade 86 is fixedly provided thereon. In the tip 88, a first cutting edge ridge 88a is formed at the center in the blade thickness direction at the radial outer peripheral edge so that the front side in the rotational direction (the direction of the arrow in the figure) is low and the rear side is high. A symmetrical mountain-shaped first inclined surface 88b is formed from the cutting edge ridge 88a radially inward. Furthermore, a second cutting edge ridge 88c extending radially inward from the front end of the first cutting edge ridge 88a is formed at the center in the blade thickness direction on the front end side in the rotation direction of the tip 88, and the second cutting edge ridge is formed. A symmetrical mountain-shaped second inclined surface 88d is formed from 88c to the rear. In FIG. 4, 8
Reference numeral 9a denotes a mountain-shaped flank provided on the rear side of the tip 88 in the rotation direction R, and reference numeral 89b denotes a slit formed from the tooth bottom toward the inside of the saw blade 86 in the radial direction to suppress resonance. Although not shown, a normal band saw can be used in the present invention.

The corrugated board material forming machine 10 rotates the plurality of laminated small pieces 7 produced by the laminated small piece forming machine 8 by 90 ° (turns the corrugated plate 1a up and down). A first pusher 10a is fed laterally from a standby position where it is made to wait to a position on the front side of the supply of the corrugated board raw material forming machine 13, and a glue is applied to the top surface 71 (or the bottom surface 72) of the laminated small piece 7 during the feeding. Third gluing machine 1 consisting of a spray gun or gluing roll for spraying C
0b, and a second pusher 10c reciprocating in a direction orthogonal to the first pusher 10a. The second pusher 10c causes the laminated small piece 7 sent by the first pusher 10a to advance to the preceding laminated small piece 7 sent to the front side of the supply of the corrugated board raw material forming machine 13 in the previous operation,
The top surface of the laminated piece 7 is joined to the bottom surface of the preceding laminated piece 7 to produce the corrugated board 9.

The corrugated board raw material forming machine 13 has a belt-type fourth gluing machine 13a for adhering glue on the upper and lower surfaces of the corrugated board 9 and a lower and upper rear portion thereof. First and second unreeled from roll
A pair of upper and lower press-contact rolls 13b, 13b are formed by joining the sheets 11a, 11b to both upper and lower surfaces of the corrugated cardboard 9 to which the glue is attached by the fourth gluing machine 13a.
And a second dryer 13c for drying the corrugated board raw material 12
And

As the cutting machine 15, a guillotine cutter having a single blade, a traveling circular saw or the like is used, and the corrugated board 12 is cut into a predetermined length in the longitudinal direction. The corrugated board 14 is used.

Next, a method of manufacturing the corrugated board 14 using the manufacturing apparatus 100 will be described. First, FIG.
The base paper 1c unwound from the first roll 21 as shown in FIG.
Are bent in a wavy shape by the projections 22a of the pair of upper and lower rolls 22 with projections to form the corrugated plate 1a. Also,
A glue is adhered to the lower surface of the corrugated plate 1a by a first gluing machine 23, and a liner 1b fed from a second roll 24 is joined to form a long corrugated cardboard 1. The corrugated cardboard 1 is cut to a predetermined length by the cutter 3 and then transferred onto the conveyor 41 with the liner 1b facing downward.
The glue is attached to the upper surface of a.

That is, as shown in FIG. 5, the corrugated cardboard 1 has a structure in which a liner 1b is integrally joined to a lower surface of a corrugated plate 1a. At this time, the height of the eyes of the corrugated cardboard 1, that is, the height from the liner 1b to the top surface of the corrugated plate 1a can be arbitrarily adjusted. According to the embodiment of FIG. 1, since the rolls 22 with projections are used to form the corrugated board 1a of the corrugated cardboard 1, the height of the projections 22a is changed to change the height of the corrugated board 1a.
By changing the height a, the height of the cardboard 1 can be changed freely.

The cardboard 1 on the conveyor 41
Is moved to the elevator 60 by the vertical pusher 63 and cooperates with a horizontal pusher (not shown) to position the cardboard 1 at a predetermined position on the elevator 1. By repeating the operation of placing the cardboard 1 on the elevator 60 a plurality of times while lowering the elevator 60 by the thickness of the cardboard 1, a laminated body 5 in which a plurality of cardboards 1 are stacked and integrated is produced.
Thereafter, the stoppers 62 and 63 are retracted upward, the elevator 60 is raised, and the laminate 5 on the elevator 60 is transferred to the conveyor 64 of the first dryer 66 by a pusher (not shown). An upper plate-shaped weight board 65 is placed and pressurized. In this state, the glue dries while the laminate 5 is being conveyed by the conveyor 64, and the bonding is completed. After the weight 65 is removed, a plurality of the dried laminates 5 are stacked on a carrier 67 by a robot (not shown) and transferred to the step of FIG. The placing and removing of the weight 65 with respect to the stacked body 5 is performed using an elevator such as an electric hoist. Instead of using the weight 65, the upper surface of the laminate 5 may be pressed by a press.

Next, as shown in FIG. 2, the plurality of stacked bodies 5 conveyed together by the conveying machine 67 are aligned one by one back and forth, and the stacked bodies 5 are pushed from behind by a pusher (not shown). While the circular saw 8 is rotationally driven by the motor 81
2, a plurality of small laminated pieces 7 are sequentially cut at a predetermined width interval (front-back direction interval). At this time, the laminate 5 is cut by the circular saw 82 along a cutting line b orthogonal to the ridge line a of the corrugated plate 1a constituting the cardboard 1. As described above, the circular saw 82 has a large number of teeth 84 protruding in a row in the width direction on the distal end side of the saw blade 83. 11a and 11b) are moderately roughened.

Further, the cut laminated small pieces 7 are exposed so that the corrugated plate 1a of the corrugated cardboard 1 is oriented vertically, that is, the cut surfaces appropriately roughened by the circular saw 82 are exposed on both upper and lower surfaces. As described above, the robot is turned to the standby position while being turned 90 °. Then, the laminated small piece 7 is moved from the standby position to the fourth gluing machine 13a by the forward operation of the first pusher 10a.
Is moved to a position on the near side of the supply side, and the fourth gluing machine 10b is attached to the top surface 71 (or the bottom surface 72) of the laminated small piece 7 on the way.
Glue. Thereafter, by the forward operation of the second pusher 10c, the laminated small piece 7 sent by the first pusher 10a is moved to the preceding laminated small piece 7 side which is sent to the supply side of the fourth gluing machine 13a in the previous operation. It is advanced and joined to the preceding laminated small piece 7 to form a long and flat corrugated board material 9.

Further, a glue is adhered to the upper and lower surfaces of the corrugated board material 9 by a fourth gluing machine 13a, and the first and second glues are fed from the sheet winding roll to the glue-applied surfaces.
The sheets 11a and 11b are joined by a press roll 13b. At this time, the upper and lower surfaces of the corrugated cardboard plate material 9 are circular saws 82 in order to form the laminated small pieces 7 from the laminated body 5 as described above.
When the cutting is performed, the circular saw 82 is appropriately roughened, so that the upper and lower surfaces of the corrugated cardboard 9 can be satisfactorily glued, and the respective sheets 11a and 11b can be reliably and firmly joined and integrated. Therefore, a corrugated board 14 described later can be obtained at low cost as compared with the conventional case where the rough surface is separately processed. Note that only one of the sheets 11 a and 11 b may be joined to the corrugated board 9.

Thereafter, the corrugated board 9 to which the sheets 11a and 11b are joined is sent to a second dryer 13c, and is heated and dried when passing through the second dryer 13c to form a long corrugated board raw material 12. You. Then, the cardboard board raw material 12 is cut into a predetermined size by a cutting machine 15 to form a cardboard board 14. When the laminated body 5 is cut along the cutting line b by the circular saw 82, the width of the obtained laminated small piece 7 (the front-back dimension) is changed when the laminated body 5 is cut along the cutting line b. Thereby, the height can be arbitrarily set according to the application.

The corrugated board 14 has a structure in which a large number of corrugated boards 1 are arranged such that the corrugated boards 1a have their eyes pointed in the vertical direction, and sheets 11a and 11b are joined and integrated on both upper and lower surfaces. Therefore, it has excellent heat insulation and soundproofing properties, and is lightweight and has excellent strength in the vertical direction.

The corrugated board 1a and liner 1b constituting the corrugated board 1 and the first and second sheets 11a and 11b to be joined to the upper and lower surfaces of the corrugated board 9 are not limited to paper made of pure pulp, but are made of resin. Anything including such can be used. The corrugated cardboard 1 may be provided with liners on both sides of the corrugated plate 1a. Further, the corrugated board 9 may have a sheet joined to only one side thereof. In addition, the corrugated cardboard forming machine 2 and the cutter 3 and the transfer gluing machine 4 shown in each figure.
It is not always necessary to use the corrugated cardboard 1, and a plurality of the corrugated cardboards 1 may be laminated and joined to form the laminate 5.

In the present invention, the above-described corrugated board 1
4 may be a multi-layer structure in which a plurality of sheets 4 are stacked in the front and back directions. That is, glue is applied to the surface of the sheet 11a or 11b provided on the first-layer corrugated board 14, and the corrugated board 9 is supplied and bonded thereon, and the glue is applied to the surface of the corrugated board 9 to form a sheet. Supply and bonding are performed, and by repeating such operations, a multilayer structure is formed. When a corrugated board having a sheet adhered to only one side is used, the sheet is superposed so as to be interposed between a plurality of corrugated board.

When manufacturing the above corrugated board 14,
Starch glue or acetic glue can be used. There is no problem with acetic acid glue because it generates a small amount of water. However, when an inexpensive starch glue is used to reduce the cost, the starch glue contains a large amount of water (about 70%). May occur. That is, when the first and second sheets 11a and 11b are pasted on the upper and lower surfaces of the corrugated board material 9 with starch glue to form the corrugated board material 12, the upper and lower surfaces of the corrugated board material 12 are each sheet 11
It is closed at a and 11b. Therefore, when the corrugated board raw material 12 is heated and dried in the drying chamber 13c, the water contained in the starch paste evaporates to generate a large amount of steam, and this steam is blocked by the sheets 11a and 11b. The inside of the raw material 12 is filled. Further, the air expansion force in the corrugated board raw material 12 that tends to peel off each of the sheets 11a and 11b by heating and drying increases. For this reason, each of the sheets 11a and 11b may be lifted and peeled by the pressure of steam or the air expansion force.

Therefore, in order to solve the above problems, it is preferable to use a corrugated board raw material forming machine 13A as shown in FIG. This corrugated board material forming machine 13A is a long corrugated board material 9 made by the corrugated board material forming machine 10 from the left side of the figure.
And two pairs of upper and lower feed rollers 50A and 50B, which are transported in the direction A with the direction of the eyes up and down, sandwiched from above and below, a first gluing machine 51 for applying starch glue to the lower surface of the corrugated cardboard 9, and the corrugated cardboard 9 A plurality of guide rollers 52 for feeding the second sheet 11b to the lower surface side of the sheet, a first crimping machine 5 for pressing and attaching the second sheet 11b to the lower surface thereof while transferring the second sheet 11b and the corrugated cardboard 9 at the same speed.
3. Corrugated board 1a of corrugated board 1 constituting corrugated board 9
A hot air blower 54 for blowing hot air into the inside of the container, a second gluing device 55 for adhering starch paste on the upper surface of the corrugated board 9, and a plurality of guide rollers 56 for feeding the first sheet 11 a to the upper surface side of the corrugated board 9. The second crimping machine 57 for pressing the first sheet 11a on the upper surface side of the corrugated cardboard 9 while transferring the corrugated board 9 to which the second sheet 11b is adhered and the second sheet 11a at the same speed.
Has been arranged. The hot air blower 54 may be omitted.

As the first and second gluing machines 51 and 55, those having the same configuration as the respective gluing machines 23 and 42 in FIG. 1 are used.

The first crimping machine 53 comprises a pair of upper and lower first
Second belt conveyors 53a and 53b are provided.
c, 53c and a running belt 53 stretched around the outside thereof.
d. Also, when joining the second sheet 11b to the lower surface of the corrugated cardboard 9 with starch glue, the inside of the second conveyor 53b arranged on the lower side is provided with a plurality of pieces for heating and drying the starch glue to quickly join them. Is disposed. Further, the traveling belt 53d of the first conveyor 53a disposed on the upper side is formed of a mesh material or a cloth material having a large number of holes through which water vapor can pass.

The hot air blower 54 comprises a duct 54a disposed on the upper surface of the corrugated cardboard 9 so as to face and a hot air blower 54b connected to the duct 54a. The hot air from the blower 54b is passed through the duct 54a. The corrugated board 9 is blown into the inside through the eyes.

The second crimping machine 57 comprises a pair of upper and lower first and
There are provided second belt conveyors 57a and 57b, and these conveyors 57a and 57b are a pair of left and right rollers 57a and 57b, respectively.
c, 57c and a running belt 57 wrapped around the outside.
d. Also, when the first sheet 11a is bonded to the upper surface of the corrugated cardboard 9 with starch glue, a plurality of pieces for heating and drying the glue and joining them quickly are provided inside the first conveyor 57a arranged on the upper side. Heater 5
7e is arranged. Further, the second conveyor 57b arranged on the lower side is provided with a suction device 57f for sucking the water vapor remaining in the corrugated cardboard plate material 9. However, the suction device 57f may be omitted in some cases. The traveling belt 57d of the second conveyor 57b is formed of a mesh material or a cloth material having many holes through which water vapor can pass.

Next, a procedure for manufacturing a corrugated board 14 from a corrugated board 9 by the corrugated board raw material forming machine 13A having the above configuration will be described. First, as shown by an arrow A in the figure, a long corrugated board 9 made by the corrugated board forming machine 10 is fed to each of the feed rollers 50A, 50A.
B is transported to the first gluing machine 51 side and the starch glue is adhered to the lower surface side of the corrugated board 9. Subsequently, the second sheet 11b is fed into the lower surface side of the corrugated board 9 via the guide roller 52, and the corrugated board 9 and the sheet 11b are separated by the first crimping machine 53.
The first and second belt conveyers 53a and 53b are pressed and joined by starch glue while being conveyed.

The heater 5 in the second conveyor 53b
3e heats and dries the starch paste between the lower surface of the corrugated board 9 and the second sheet 11b. At this time, the heater 5
Water vapor is generated from the starch paste by heating 3e,
This steam quickly flows out to the outside. That is, the first sheet 11a is not yet joined to the upper surface of the corrugated cardboard 9 and the upper surface of the eyes of the corrugated cardboard 9 is held in an open state, and the traveling belt 53d of the first conveyor 53a has many holes. Since it is formed, the water vapor is discharged from the upper surface of the eyes to the outside of the corrugated cardboard 9 via the traveling belt 53d. Further, the air heated by the heater 53e is also discharged outside through the eyes.

Thereafter, the hot air blower 54b is
a is blown into the inside of the corrugated board 9 from the upper side of the eyes, and the moisture contained in the starch paste evaporates as steam, and the corrugated board 9 and the second sheet 1 are heated.
The starch paste between 1b is dried, and both are quickly joined and integrated. Even when the hot air is blown out, the upper surface of the corrugated cardboard 9 is still open without the first sheet 11a being stuck to the upper surface of the corrugated cardboard 9, so that the starch glue can be removed through the eyes. The generated water vapor is released outward together with the warm air, and does not stay in the corrugated board 9.

After that, the second gluing machine 55 makes the starch glue adhere to the upper surface of the corrugated board 9. Also,
Subsequently, the first sheet 11a is fed into the upper surface side of the corrugated board 9 by the guide roller 56, and the first sheet 11a and the corrugated board 9 to which the second sheet 11b is stuck on the lower side are formed into a second sheet. The first sheet 11a is joined to the upper surface side of the corrugated board 9 by starch glue while being transferred and pressed by the first and second belt conveyors 57a and 57b of the crimping machine 57. Here, in order to correspond to a plurality of types of corrugated cardboard materials 9 having different thicknesses, the first belt conveyor 57a and the heater 57e are moved up and down integrally by using a manual operation or a lifting / lowering drive to adjust the vertical position. It is set so that it can be adjusted.

The heater 5 in the first conveyor 57a
7e heats and dries the starch paste between the upper surface of the corrugated board 9 and the first sheet 11a, whereby the corrugated board 9 and the first sheet 11a are quickly joined. At this time, steam is generated from the starch paste with heating of the heater 57e, but the amount thereof is small. That is, the first sheet 11
a, since the second sheet 11b is already joined to the lower surface side of the corrugated board 9, the corrugated board 9
The eyes are closed at the top and bottom, and the inside is in a closed state. However, since the steam generated from the starch paste between the corrugated cardboard 9 and the second sheet 11b has been released in advance as described above, The amount of water vapor generated from the glue between the second sheets 11b and filled therein is small.

At this time, when the suction device 57f provided on the second conveyor 57b is driven, the water vapor remaining in the corrugated board 9 is sucked to the outside through the holes of the first sheet 11a and the traveling belt 57a. You. Further, the heated air in the corrugated board 9 is taken out together with the water vapor by the suction device 57f. Therefore, each sheet 11
The air inflation force in the corrugated cardboard 9 for removing the a and 11b is reduced. Moreover, each of the sheets 11a and 11b is formed of a paper material such as pulp.
Water vapor and heated air are also released from b. Therefore, the sheets 11a and 11b are securely and firmly joined to the upper and lower surfaces of the corrugated board 9 without peeling off the sheets 11a and 11b, and a good corrugated board 12 is obtained. This corrugated board raw material 12 is cut into a predetermined size by a cutting machine 15 as shown in FIG.

The corrugated board 14 obtained by the apparatus 100 shown in FIGS. 1 and 2 or the apparatus 13A shown in FIG. 6 has the corrugated plate 1a and the liner 1b partially exposed on the outer periphery thereof. If you want a good appearance, do the following. In other words, as shown in FIG. 7A, the sheets 11a, 11
The end of b is pushed up and down in the vertical direction using a spatula, for example, to be peeled off. Then, as shown in FIG. 3B, the tape-shaped sheet 11c is attached by gluing the expanded portion to the tape, and the expanded sheets 11a and 11b are joined again to form the corrugated plate 1a and the liner. Hide 1b.
As the sheet 11c, upper and lower sheets 11a, 11
The same material as b can be used.

Further, in the present invention, a corrugated board 90 as shown in FIG. The corrugated board 90 is made of the corrugated board 1 described above,
The laminated body 5 and the laminated small pieces 7 form a corrugated cardboard plate material 9 having front and back surfaces orthogonal to the ridge line a of the corrugated plate 1a, and bent at both ends facing the front and back surfaces of the corrugated plate 1a. The part 91 is provided integrally. In the embodiment shown in the figure, a bent portion 92 extending in the same direction as the bent portion 91 provided on the corrugated plate 1a is also formed on the front and back surfaces of the liner 1b.

When manufacturing the above corrugated board 90,
As shown in FIG. 2, a laminated body 5 obtained by laminating a plurality of the corrugated cardboards 1 is cut along a cutting line b to form laminated small pieces 7, and the plurality of the corrugated boards 1a are vertically aligned. The top surface 71 and the bottom surface 72 of the laminated small pieces 7 are joined and integrated to form a corrugated board 9. Then, when the laminated small piece 7 is made from the laminated body 5, a chip saw 85 as shown in FIG. 4 (or a circular saw 9 as shown in FIG.
Use 2). Then, at the time of cutting by the chip saw 85, a margin is left on the cut end surface of the laminated body 5 by the chip 88 in front of the entering direction P of the chip saw shown in FIG. And By doing so, the bent portions 91 and 92 are formed simultaneously when the laminate 5 is cut without requiring another step.

At this time, the height H of the eyes of the corrugated plate 1a
Is 8 to 15 mm. In this way, the number of the corrugated cardboards 1 to be used can be reduced and the corrugated cardboard flat plates 9 of a predetermined size can be used.
0 is obtained, which is lightweight and excellent in resource saving. Further, as shown in FIG. 9, the length L of the bent portions 91 and 92
Is 1.0 to 5.0 times the thickness T of the corrugated plate 1a, and more preferably, L is about 2T. In this way, the mechanical strength of the obtained corrugated cardboard flat plate 90 is enhanced. When the sheets 11a and 11b are bonded to the bent portions 91 and 92 as shown in FIG. Adhesion to a curved part can be performed reliably and firmly. Note that the sheet does not necessarily need to be bonded to the bent portion, and the cardboard flat plate 90 without a sheet may be used.

Next, the result of a bending strength test of the corrugated board 90 will be described. In this test, a liner having a basis weight of 280 g / m ² (about 1 mm thick) and a liner having a basis weight of 22
A corrugated board made of corrugated board made of a corrugated board of 0 g / m ² (about 0.5 mm in thickness) was used. This liner
The height (eye height) of the mountain is 10 mm, and the pitch of the mountain is 18 mm. Further, the corrugated cardboard has bent portions of about 1.5 mm in length at both ends of the corrugated plate and the liner. Further, a sheet having a basis weight of 280 g / m ² (thickness of about 1 mm) is adhered to both upper and lower surfaces of the corrugated board. Further, the cardboard flat plate is manufactured using the chip saw 85 of FIG. And from the above corrugated board flat plate, length 250mm, width 300mm, thickness 25mm
Made a sample.

The measurement conditions were as follows: a compression tester manufactured by Toyo Tester Industry Co., Ltd. was used as the test equipment, and the test speed was 10
mm / min, distance between supports 200 mm, test temperature / humidity 16
C., 65%. FIG. 14 shows the results of measuring the load at which buckling occurred by performing five three-point bending tests on the sample. FIG. 3A shows the tip saw 8.
The sample obtained by performing the wet cutting while pouring water on 5 is shown as A, and the sample obtained by performing the dry cutting is shown as B. In addition, the test results of a reference sample using a circular saw (a bent portion is not formed on a corrugated board and a liner of corrugated cardboard) are also shown. The vertical and horizontal directions in FIG. 14 (a) refer to the case where the plane direction of the cutting plate 12 shown in FIG. 14 (b) matches the pitch direction of the corrugated plate and the direction orthogonal thereto.

As apparent from FIG. 14 (a), the average strength in the vertical and horizontal directions and the bending strength per unit length (100 mm) of the samples A and B are enhanced with respect to the reference sample. From this, it can be understood that the corrugated board obtained by the present invention has excellent bending strength.

The corrugated cardboard plate 1 obtained as described above
4, 90, for example, as shown in (a, b) of FIG.
Used as a pallet 20. This pallet 20
The corrugated cardboard plates 14, 90 are used as the upper plate and the lower plate, and a beam member 20a made of a paper material is mounted between them.
As the girder material 20a, for example, Japanese Patent Application No. 6-14383.
As described in No. 3, a cylindrical cardboard paper tube formed by spirally winding cardboard is preferably used.

The cardboard flat plates 14, 90 can also be used as a tatami 93 as shown in FIG. In the embodiment shown in the figure, a single-sided cardboard 94 is joined to the outer surfaces of the cardboard flat plates 14 and 90. This single-sided cardboard 94
Is formed by fixing a liner 94b to the back side of the corrugated plate 94a, and the liner 94b is glued to the outer surfaces of the cardboard flat plates 14, 90. At this time, it is preferable that the corrugated plate 94a of the single-sided corrugated cardboard 94 reduce the waveform.
This improves the feel.

Here, the fine-grained single-sided cardboard 94
1 is formed by a cardboard forming machine 2 similar to that shown in FIG. 1, but a pair of upper and lower projecting rolls 22 forming a corrugated plate 94a are usually formed into a plurality of roll divided bodies in the axial direction. Since the rolls are divided, by providing a gap between the roll divided bodies, a waveform peak is not formed at a portion corresponding to the gap. As a result, as shown in FIG. 11, a plurality of flat stripes 99 extending in the vertical direction remain on the corrugated plate 94a. Since the streaks 99 are also provided with conventional tatami mats, the tatami mats 93 of the present invention have a more natural feel.

Tatami 93 of FIG. 12 shown as another embodiment
In this example, two of the cardboard flat plates 14 and 90 are overlapped in the up and down direction, that is, in the front and back directions, and a tatami table 95 is sewn to the outer surface thereof. The tatami mat 95 is sewn with cloth edges 95b arranged on both sides of a tatami mat 95a. At this time, when the two corrugated cardboard plates 14 and 90 are used as described above, the sheets 11a and 11b provided on the front and back sides of the
5b is caught when sewing with a tatami thread,
Secure and strong sewing of the tatami table 95 can be performed. Here, the lower corrugated cardboard flat plates 14 and 10 may not have a sheet on the back surface, but a sheet is required between the two flat plates. When the tatami 93 is used as described above, the single-sided cardboard 94 of the cardboard flat plates 14 and 90 or the tatami mat 9
On the 5th side, a corrugated cardboard with a fine and corrugated corrugated board may be interposed. By doing so, the cushioning property and feel of the tatami mat are improved. Furthermore, in the case of the tatami 93,
Incisions may be formed at a plurality of locations in the length direction so that the incisions can be folded into a plurality of portions, which is convenient for storage and the like.

The tatami 93 shown in FIG. 11 and FIG.
Is made of corrugated cardboard.
Activated carbon for deodorization can be put in the eyes, and thereby, an unpleasant odor due to dirt on the tatami 93 can be removed.

FIG. 13 shows an embodiment in which two of the corrugated cardboard plates 14 and 90 are overlapped and used as a partition 96. When the partition 96 is used, nails and hooks 97 are attached to the partition 96. By using two sheets of the cardboard flat plates 14, 90 stacked in the front and back directions, the sheet 1 provided on the front and back surfaces is used.
Since 1a and 11b become hooks of the hook 97 and the like,
The hook 97 or the like can be securely and firmly attached to the partition 96. 13 can also be used as an outer wall of a simple building such as a temporary housing. When used as an outer wall, the outer surfaces of the sheets 11a and 11b may be coated with a water-resistant material, or a water-resistant metal plate or a resin plate may be attached.

In each of the above embodiments, the shape of the corrugated plate is U-shaped (or sinusoidal) as shown in FIG. 5, but it may be V-shaped or trapezoidal. Since the bonding area between the upper side and the liner is increased, the strength of the corrugated board is improved.

In the above embodiment, the tatami 93, the partition 96, and the pallet 20 for receiving cargo are shown as examples of the use of the corrugated cardboard flat plates 14, 90. However, the corrugated cardboard flat plates 14, 90 have heat insulating and soundproof properties. Excellent, lightweight and excellent in strength. In addition to the above, core materials for furniture such as tables, counters and storage shelves, core materials for racks such as audio equipment and office automation equipment, cushioning materials for packaging, packaging It can be optimally used as a corner material for filters, a filter with titanium oxide or activated carbon loaded inside, and a heat exchanger element. In such a use, the outer surfaces of the corrugated board 14 and 90 can be coated with a water-resistant material as needed.

[0065]

As described above, according to the present invention, it is possible to obtain a low-cost corrugated board made of corrugated board which is excellent in heat insulation and soundproofness, and is lightweight and excellent in strength.
Further, by using the corrugated cardboard flat plate, it is possible to obtain a tatami mat which is lightweight and has excellent heat insulating effect and which is optimal for an emergency temporary house and a partition which is optimal for a restaurant or an office.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing a part of an apparatus for manufacturing a cardboard flat plate.

FIG. 2 is a perspective view schematically showing another portion of the device.

FIG. 3 is an enlarged cross-sectional view of a circular saw as one embodiment of a laminated small piece forming machine.

FIGS. 4A and 4B show a chip saw as another embodiment of a laminated piece forming machine, wherein FIG. 4A is a partial side view and FIG. 4B is a front view of a chip portion.

FIG. 5 is an enlarged plan view showing a cardboard.

FIG. 6 is a side view schematically showing another embodiment of the corrugated board raw material forming machine of FIG. 2;

FIG. 7 is an explanatory view when the outer periphery of the corrugated cardboard is concealed by a sheet, (a) is a side view showing the working state,
(B) is a side view of the state concealed by the sheet.

FIG. 8 is a perspective view showing another embodiment of a cardboard flat plate.

FIG. 9 is a longitudinal sectional view of a corrugated plate for explaining a bent portion of the corrugated board material.

10A and 10B show a pallet as an example of using a corrugated cardboard flat plate, where FIG. 10A is a side view and FIG. 10B is a plan view.

FIG. 11 is a perspective view of a tatami mat as an example of using a corrugated cardboard flat plate.

FIG. 12 is a perspective view showing a tatami mat according to another embodiment.

FIG. 13 is a side view showing a partition as an example of using a corrugated cardboard flat plate.

FIG. 14 is a diagram showing a bending test result and a test procedure of a cardboard flat plate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Corrugated cardboard, 1a ... Corrugated board, 1b, 1c ... Liner, 5
... Laminated body, 6 ... Laminated body forming machine, 7 ... Laminated piece, 71 ... Top face, 72 ... Bottom face, 8 ... Laminated piece forming machine, 9 ... Corrugated board material, 10 ... Corrugated board material forming machine, 11a, 11b, 11
c: Sheet, 12: Corrugated board raw material, 13, 13A: Corrugated board raw material forming machine, 14, 90: Corrugated flat board, 91
... Bending part, 15 ... Cutting machine, 94 ... Single sided cardboard, 95 ...
Tatami table, a ... ridgeline, b ... cutting line.

Claims (7)

[Claims] 1. A laminated body is formed by laminating and joining a plurality of cardboards having a liner fixed to at least one surface of a corrugated plate, and the laminated body is divided into a plurality of pieces along a cutting line orthogonal to a ridge line of the corrugated plate. Cutting into laminated small pieces, joining the top and bottom surfaces of a plurality of laminated small pieces to produce a long and flat corrugated board, and gluing a sheet made of paper to at least one side of the corrugated board. A method of manufacturing a corrugated board, in which a board raw material is produced, and the corrugated board raw material is cut into predetermined dimensions to obtain a corrugated board flat plate. 2. A laminate forming machine for forming a laminate by laminating and joining a plurality of cardboards having a liner fixed to at least one surface of a corrugated plate, and a cutting line orthogonal to a ridge line of the corrugated plate. A laminated piece forming machine that cuts a plurality of laminated pieces into pieces to form a laminated piece; a corrugated board material forming machine that joins top and bottom surfaces of the plurality of laminated pieces to form a long and flat corrugated board material; A corrugated board material forming machine for forming a corrugated board material by adhering a sheet made of a paper material to at least one side of the corrugated board; and a corrugating machine having a cutting machine for cutting the corrugated board material into predetermined dimensions to form a corrugated board flat plate. Flat plate manufacturing equipment. 3. A corrugated board manufactured according to claim 1, wherein a plurality of corrugated boards having a liner fixed to at least one surface of a corrugated board are laminated and joined, and have corrugated boards having front and back surfaces orthogonal to ridge lines of the corrugated board. Corrugated board flat plate made of board material. 4. A corrugated board made of a corrugated board having a plurality of corrugated boards each having a liner fixed to at least one surface of a corrugated board and joined together, and having front and back surfaces orthogonal to a ridge line of the corrugated board. The height of the corrugated plate is 8 to 15 mm, and both end portions of the corrugated plate facing the front and back surfaces are bent in a direction along the front and back surfaces, and the length of the bent portion is from 1.0 of the thickness of the corrugated plate. Corrugated board that is 5.0 times. 5. The corrugated cardboard flat plate according to claim 3 or 4.
Or a plurality of sheets superposed in the front and back direction via the above-mentioned sheet, and a single-sided cardboard having a liner fixed to the back side of a corrugated plate having an eye height of 0.5 to 3 mm on the surface thereof. . 6. One of the corrugated cardboard flat plates according to claim 3 or 4.
A tatami mat comprising a plurality of sheets or a plurality of sheets superposed in the front and back directions via the sheet, and a tatami mat is sewn on the surface thereof. 7. The corrugated cardboard flat plate according to claim 3 or 4.
An architectural material comprising a plurality of sheets or a plurality of sheets superposed in the front and back directions via the sheet, and the sheets are fixed to both the front and back surfaces.