JP2876104B2 - Method of manufacturing flexible long plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a flexible long plate suitable for building flooring.

[0002]

2. Description of the Related Art Conventionally, as a rectangular flooring material to be constructed on a floor substrate, a groove penetrating in the width direction is provided on the back surface thereof in order to improve the familiarity with the floor substrate having unevenness or the like. A large number of strips are used, which are engraved at desired intervals in the length direction and have a reduced flexural rigidity. For example, in the case of a flexible long plate made of plywood, since the fiber direction of the core plate having high bending strength disposed at the center of the plywood is oriented in the length direction of the long plate, this core is A long plate whose bending stiffness is weakened by applying a groove process across the plate.

[0003]

However, since the veneer layer on the upper side of the core plate (primed core plate) is oriented in the direction orthogonal to the core plate, that is, in the width direction of the long plate, On the other hand, the groove reaching the lower surface of the core plate or into the veneer layer so as to divide the core plate becomes a state in which the length direction is parallel to the fiber direction of the veneer layer, and There is a disadvantage that the scale plate is easily broken along the groove. Therefore, it is extremely difficult to obtain such a flexible long plate from a plywood having a large size (90 × 180 cm or more) with good productivity. What is necessary is that a large number of grooves penetrating in the width direction are previously formed on the back surface of the large-sized plywood to a depth reaching the veneer on the upper layer side in which the fiber direction is oriented in the groove direction. And, because the weight of large format plywood is large, for example, during handling,
When both ends of the plywood in the length direction are supported, a bending load is concentrated on a central portion in the length direction, and the plywood is broken from the groove before processing.

[0004] Therefore, after a large-sized plywood is divided into several long plates, a groove in the width direction has to be cut on the back surface of the long plates, and the productivity is reduced. there were. In addition, a floor board made of a laminated board provided with a decorative material on a plywood through an MDF (medium specific gravity fiber board) or a vibration damping sheet is also known. In this floor board, a core board of the plywood is divided from a lower surface. When a groove reaching the lower surface of the wood fiber board or the layer in the upper layer is cut, the toughness may be reduced or the strength may be insufficient, so that the groove may be broken from the groove. Further, there is a problem that even if it is unknown in terms of appearance, the damaged portions rub against each other after laying on the floor and sound is generated. The present invention has been made in view of such a problem, and an object of the present invention is to divide a long plate which is excellent in flexibility but is hard to be broken into a large-sized plate-like body. It is intended to provide a method for manufacturing a flexible long plate which can be obtained simply and efficiently by performing the method.

[0005]

In order to achieve the above object, a method for manufacturing a flexible long plate according to the present invention provides a core plate in which the fiber direction is parallel to one side at least on the surface layer side. On the back surface of a large-sized rectangular composite plate formed by arranging a wooden veneer, the oblique groove obliquely to the side of the rectangular composite plate to the depth at which the wooden veneer is divided. After a plurality of strips are engraved in parallel with each other, this rectangular composite plate is cut into a plurality of long plates by cutting it at desired width intervals in parallel with the sides. is there. Also,
The invention according to claim 2, the back surface of a large-sized rectangular composite plate-like body comprising a wood veneer serving as a core plate whose fiber direction is oriented parallel to one side at least on the surface layer side, A plurality of skewed grooves oblique to the sides of the rectangular composite plate-like body are cut in parallel with each other to a depth at which the wooden veneer is divided, and then the skewed grooves intersect with the skewed grooves. Are engraved in parallel with each other, and then the rectangular composite plate is cut into a plurality of long plates by cutting it at desired intervals in parallel with the sides. Things.

Further, in the above invention, the present invention is described in claim 3.
In the invention described above, after forming a diagonal groove on the back surface of the rectangular composite plate, a sheet-like material is adhered to the back surface of the rectangular composite plate, and thereafter , the rectangular composite plate is Is divided into a plurality of long plates by cutting at a desired width interval in parallel with the side, and the invention described in claim 4 is characterized in that the rectangular composite plate When divided into long plates, they are cut parallel to the sides of the rectangular composite plate, passing through the intersection of the two oblique grooves engraved in the direction crossing each other. . Further, the invention according to claim 5 is characterized in that the floor material is manufactured by subdividing the long plate into small pieces and then subjecting the long plate to actual processing.

[0007]

[Function] When a large number of oblique grooves are obliquely formed on the back surface of a large-sized rectangular composite plate-like body with respect to its side and are cut to a depth at which the core plate is divided, the groove direction and the upper surface of the core plate are formed. The thickness of the veneer between the bottom of the groove and the surface of the core plate, despite the fact that the fiber direction of the core plate crosses the fiber direction and the flexibility and conformability have been improved by engraving the groove The wood fiber that intersects the groove will exhibit greater bending strength against cracking than when the groove and fiber direction are parallel. For this reason, the large-sized rectangular composite plate-like body after the processing of the skewed groove is hard to break even during handling, and after the processing of the skewed groove, the large-sized rectangular composite plate-like body is removed at every desired width interval. And can be easily divided into a plurality of long plates.

Further, if the oblique grooves and a large number of oblique grooves intersecting the oblique grooves are engraved on the back surface of the rectangular composite plate, a balance can be obtained. It is possible to impart uniform flexibility to the obtained long plate in the twisting direction as well as in conformity. When obtaining such a long plate, when a large-sized rectangular composite plate-like body after processing both oblique grooves is subdivided into a plurality of long plates, as described in claim 4, If it is cut parallel to the side so as to pass through the intersection of these skewed grooves, the maximum width of the triangular portion surrounded by these adjacent skewed grooves and the intersection is the maximum width during handling and processing. In this case, the edge of the long plate can be formed at the edge where chipping is unlikely to occur, and the actual processing of the edge can be performed with high accuracy.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
In FIGS. 1 and 2, 1 is 90 cm in width and 180 c in length, respectively.
The oblique groove 2 (hereinafter referred to as an oblique groove 2) is provided on the back surface of the rectangular composite plate-like body having a large size of not less than m in a desired angle with respect to one side of the rectangular composite plate-like body 1 in FIG. 2 are formed in parallel with each other at small intervals, and in FIG. 2, a downward-sloping sloping groove 3 that is inclined in a direction intersecting with the upward-sloping sloping groove 2 is formed. A large number of strips are engraved at the same interval as the upwardly inclined sloping groove 2 in parallel with each other. And, for example, the rectangular composite plate 1
If it is a large format of 90 × 180 cm, cut the part indicated by the two-dot chain line that is divided into three equal parts in the width direction in the figure and cut it X to obtain three flexible long pieces having a width of 30 cm and a length of 180 cm Plates 1a, 1b, 1c
In the case of a floorboard, the width is appropriately selected between 10 and 60 cm.

As the rectangular composite plate 1, for example, FIG.
As shown in the figure, a laminated plate in which a decorative layer 4 is provided on the surface of a 5-ply plywood is used, and a plywood, a particle board, an MDF or the like is combined to form a core plate in which at least the fiber direction is parallel to one side. What is necessary is just to use the laminated board in which the wooden veneer 12 is arranged. In addition, the decorative layer 4 is formed by sticking a decorative veneer, a resin-injected wood veneer, or a suitable decorative sheet such as PVC or melamine.

In order to form the oblique grooves 2 and 3 in such a rectangular composite plate 1 as shown in FIG.
A cutting device having a circular cutting blade 22 attached to a rotating shaft 21 at regular intervals in a state where the rectangular composite plate-like body 1 is obliquely oriented according to the inclination angle of the oblique grooves 2 and 3 where the oblique grooves 2 and 3 are to be cut. By feeding, one of the skew grooves 2 is engraved. When the other oblique groove 3 intersecting the oblique groove 2 is engraved, the oblique groove 2 is engraved, and then the rectangular composite plate 1 is inclined in the opposite direction. It can be formed if it is sent to a cutting device in a state where it is in a state of being cut. In addition, as shown in FIG. 1, there may be a portion where the oblique groove 2 is not provided at a corner of the rectangular composite plate.

As shown in FIG. 3, the depths of these skewed grooves 2 and 3 are determined by dividing the above-mentioned wooden veneer 12 serving as a core material from the back surface of the rectangular composite plate-like body 1 and adding an additional material thereto. Wood veneer to be the core board
It is engraved to the depth reaching the center of 11 thickness. That is,
The core plate 12 made of a wooden veneer disposed at the center of the rectangular composite plate 1 has its fiber direction oriented parallel to the length direction of the rectangular composite plate 1. Since the long plates 1a to 1c when divided into small pieces have a large bending rigidity, the core plate 12 is cut and the above-mentioned wooden veneer of the upper layer is cut.
The sloping grooves 2 and 3 are engraved so as to reach the inside 11 to reduce the bending rigidity, thereby providing flexibility and adaptability to the construction surface. Note that the skew grooves 2 and 3 may be grooves having a depth reaching the upper surface of the wooden veneer 11 serving as the core board.

The cutting angle of the oblique grooves 2, 3 with respect to the long side of the rectangular composite plate 1 is 20 to 70 °, preferably 30 to 60 °.
In short, the fiber direction is in the width direction of the rectangular composite plate-like body 1, that is, in the fiber direction of the wood veneer 11 on the core plate 12 which is arranged so that the fiber direction is orthogonal to the core plate 12. It should just be crossed and carved. Therefore, even if the fiber direction of the wooden veneer 11 is oriented in the length direction of the rectangular composite plate-like body 1, if the oblique grooves 2 and 3 are carved at the above-mentioned angle, they cross the fiber direction. be able to.

As shown in FIG. 5, after a large number of skewed grooves 2 or skewed grooves 2 and 3 intersecting with each other are formed on the back surface of the rectangular composite plate 1 as shown in FIG. Then, one sheet-like material 5 is adhered to the entire back surface of the rectangular composite plate-like body 1 so as to cover the oblique grooves 2 and 3. After a while
As described above, the rectangular composite plate-like body 1 is cut in parallel to its long side by a suitable cutting blade or saw or the like at regular intervals, and a plurality of (three in the figure) flexible long strips Board 1a, 1
b and 1c are obtained.

At the time of this cutting, since the sheet-like material 5 is previously adhered to the back surface of the rectangular composite plate-like body 1 as described above, the occurrence of chipping or the like at the cut end surface is prevented by the sheet-like material 5. can do. The sheet-like material 5 may be a resin sheet or paper having flexibility and conformability to a fine uneven surface, or a rubber, urethane foam, foamed polyethylene, foamed rubber, nonwoven fabric which has flexibility and soundproofness as well as flexibility. And a sheet such as a woven fabric. Further, in the case of the rectangular composite plate-like body 1 in which the oblique groove 2 in only one direction is provided on the back surface, even if any portion in the width direction is cut in the length direction, the adjacent oblique groove 2, 2 is constant, but in the case of a rectangular composite plate-shaped body 1 in which a right-sloping sloping groove 2 and a right-sloping sloping groove 3 that intersect each other are engraved, , 3
On the back surface of the rectangular composite plate-shaped body 1, a large number of parallelogram portions 6 such as a rhombus shape and a square shape surrounded by grooves are formed on the back surface of the rectangular composite plate-like body 1.

For this reason, as shown in FIG. 6, when the rectangular composite plate 1 is cut at a position deviated from the intersection O of the oblique grooves 2, 3, the oblique grooves 2 adjacent to the cutting line c are cut. The length of the triangular portion 6a surrounded by the groove portion 3 in the cutting line X direction is reduced, and the triangular portion 6a is formed in the small triangular portion 6a, and this portion is easily dropped. In addition, if the above-mentioned sheet-like material 5 is pasted, this chipping can be prevented. Further, as shown in FIG. 2, the oblique grooves 2 and 3 are engraved so that an intersection is located at the longitudinal edge of the rectangular composite plate 1 and the intersection of the oblique grooves 2 and 3. And cut parallel to the sides of the rectangular composite plate-like body 1.

As shown in FIG. 7, the long plates 1a to 1c divided in this way are connected to the adjacent oblique grooves 2 and 3 and the cutting line X or the rectangular composite plate 1 on the long side. The triangular part 6a surrounded by the long side has a shape having the maximum width obtained by dividing the parallelogram part 6 into two parts. This makes it possible to manufacture a long plate in which the triangular part 6a is hard to be lost even during handling and actual processing. Can be done. Next, male and female nuts 7 and 8 as shown in FIG. 8 are formed on the four end surfaces of the long plates 1a to 1c to produce a flexible long floor plate. FIG. 9 is the same as the above long floor boards 1a to 1c except that an upper layer made of a medium specific gravity fiber board 11 'is provided on the upper surface of a wooden veneer 12 serving as a core board. The point is that the sloping groove 2 has a depth that divides the wooden veneer 12 serving as the core board.
3 may be provided.

Next, the long plate (referred to as A) in the embodiment of the present invention, in which oblique grooves are provided in a cross shape on the back surface obtained by the above-described manufacturing method, has the same dimensions and the same size as this long plate. The test result of the bending strength and conformity with a long plate (referred to as B) made of a material and provided with grooves parallel to the width direction on the back surface is shown. Each of the long plates A and B is a 5-ply plywood having a thickness of 9 mm, and is a long plate having a width of 50 mm and a length of 266 mm.
On the back side is at an angle of 45 ° to the side and the pitch is 44.4mm
Thus, while a diagonal groove having a depth of 6 mm is provided in an intersecting manner, a groove having a depth of 6 mm is formed on the back surface of the long plate B in a direction perpendicular to the long side and at a pitch of 50 mm. .

These long plates A and B are supported at a pitch of 216 mm.
When both ends were supported and a load was applied to the upper surface of the central part, the long plate A had a breaking load of 9 kg and a bending strength of 80 kg / cm ^2.
On the other hand, the long plate B had a breaking load of 5 kg and a bending strength of 44 kg / cm ² , and the long plate A obtained by the method of the present invention had about twice the bending strength. Was.
In addition, when the central portions of the long plates A ′ and B ′ having a width of 300 mm and a length of 1800 mm provided with the same grooves as the two long plates A and B were lifted,
The lifting height before both ends were lifted from the ground contact surface was 10 to 15 cm. From this, it was found that the familiarity was substantially the same.

[0020]

As described above, according to the method for manufacturing a flexible long plate of the present invention, a large-sized wooden plate having a core plate whose fiber direction is parallel to one side is arranged. On the back surface of the rectangular composite plate-like body of a size, oblique grooves oblique to the sides of the rectangular composite plate-like body were engraved in parallel with each other to a depth that divides the wooden veneer. Later, since the rectangular composite plate is cut into a plurality of long plates by cutting it at desired intervals in parallel with the sides, the skew grooves are in the fiber direction of the wooden veneer. Since they intersect, the wooden fiber above the groove bottom of the sloping groove increases the breaking strength in the sloping groove compared to the case where the groove and the fiber direction are parallel, and therefore, after processing the sloping groove. The large-sized rectangular composite plate-shaped body is difficult to break even during handling. And a composite plate-shaped body was cut into a desired width spacing can easily be Kowari the plurality of elongated plates,
The flexible long plate can be efficiently mass-produced.
Further, since the divided flexible long plate is hard to break, no floor noise is generated after the floor is laid.

Further, as described in claim 2, the oblique groove and the oblique groove intersecting the oblique groove are engraved on the back surface of the rectangular composite plate-like body, so that the overall structure is improved. It is possible to obtain a well-balanced long plate exhibiting uniform flexibility and conformability. According to the third aspect of the present invention, after the oblique groove is formed on the back surface of the rectangular composite plate, a sheet is adhered to the back surface of the rectangular composite plate. Therefore, when the sheet is divided into a plurality of long plates, the ends are reinforced by the sheet-like material, thereby preventing the cut end face from being chipped or falling off from the oblique groove.

Furthermore, when the rectangular composite plate is subdivided into long plates as in the invention described in claim 4, the rectangular composite plate is cut parallel to the sides so as to pass through the intersection of the oblique grooves. For example, the maximum width of a triangular portion surrounded by these skewed grooves and intersections can be maximized, so that the edge of the long plate is formed at the edge where chipping is unlikely to occur. In the case where this long plate is processed into a floor plate, the actual processing on the edge can be easily and accurately performed.

[Brief description of the drawings]

FIG. 1 is a rear view of a rectangular composite plate having a diagonal groove formed in only one direction on the rear surface;

FIG. 2 is a rear view of a rectangular composite plate-like body in which oblique grooves are engraved on the back surface in directions intersecting each other;

FIG. 3 is an enlarged longitudinal sectional view partially omitted,

FIG. 4 is a simplified plan view showing a method for processing a skew groove,

FIG. 5 is a partially omitted enlarged longitudinal sectional view of a rectangular composite plate-like body having a sheet-like material adhered to the back surface;

FIG. 6 is a partially enlarged rear view in which a portion deviated from an intersection of a skew groove is cut;

FIG. 7 is a partially enlarged back view of a case where an intersection of a skew groove is cut;

FIG. 8 is a partially enlarged sectional view of a long floor plate;

FIG. 9 is a partially enlarged sectional view of a long floor plate of a modified example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rectangular composite plate-shaped object 1a, 1b, 1c Long plate 2, 3 Oblique groove 5 Sheet-shaped object 11 Wooden veneer (core plate) 12 Wooden veneer (core plate)

Claims (5)

(57) [Claims] 1. A large-sized rectangular composite plate comprising a wood veneer serving as a core plate whose fiber direction is oriented parallel to one side at least on the surface layer side, and the rectangular composite After forming a large number of oblique grooves obliquely with respect to the sides of the plate-like body to a depth at which the wooden veneer is divided, the rectangular composite plate-like body is desirably parallel to the side. A method for manufacturing a flexible long plate, wherein the long plate is divided into a plurality of long plates by cutting at every width interval. 2. A large-sized rectangular composite plate comprising a wood veneer serving as a core plate whose fiber direction is oriented parallel to one side at least on the surface layer side, and the rectangular composite A number of skewed grooves oblique to the sides of the plate-shaped body, up to a depth that divides the wooden veneer, are carved in parallel with each other, and then a number of skewed grooves intersecting with the skewed grooves A flexible length characterized by being cut in parallel to each other, and then cutting the rectangular composite plate into a plurality of long plates by cutting it at desired width intervals in parallel with the sides. Manufacturing method of shaku. 3. An oblique groove is formed on the back surface of the rectangular composite plate, and then a sheet is adhered to the back surface of the rectangular composite plate, and then the rectangular composite plate is formed. 3. The method for manufacturing a flexible long plate according to claim 1 or 2, wherein the thin plate is divided into a plurality of long plates by cutting at a desired width interval in parallel with the side. 4. When the rectangular composite plate is subdivided into long plates, the rectangular composite plate passes through the intersection of the two oblique grooves formed in the direction intersecting with each other and extends along the sides of the rectangular composite plate. The method for producing a flexible long plate according to claim 2, wherein the flexible long plate is cut in parallel. 5. The method for manufacturing a flexible long plate according to claim 1, wherein the long plate is subdivided and then the long plate is subjected to actual processing.