JPH08142006A - Method for manufacturing flexible long plate - Google Patents

Abstract

(57) [Abstract] [Purpose] From a large-sized rectangular composite plate,
Efficiently manufacture multiple long plates with excellent familiarity. [Structure] On the back surface of a large-sized rectangular composite plate-shaped body 1 made of plywood, a large number of oblique grooves 2 are formed in a diagonal direction to the upper right and a diagonal direction to the lower right with respect to the sides of the rectangular composite plate-shaped body 1. 3 is divided into a wood veneer 12 which is a core plate of the rectangular composite plate body 1,
The oblique groove 2 is formed by engraving to a depth reaching the inside or the lower surface of the wood veneer 11 on the surface layer side so that these oblique grooves 2 and 3 and the fiber direction of the wooden veneer 11 intersect. The crack-proof strength is increased by the fibers between the groove bottom of No. 3 and the surface of the wood veneer 11, and the rectangular composite plate-like body 1 is parallel to the side and the above-mentioned oblique grooves 2, 3 are formed at regular intervals. A plurality of flexible long plates are manufactured by cutting from a cutting line passing through the intersection of

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a flexible long board suitable for a floor material for construction.

[0002]

2. Description of the Related Art Conventionally, as a rectangular floor material to be constructed on a floor substrate, a groove penetrating in the width direction is formed on the back surface of the floor substrate in order to improve compatibility with the floor substrate having unevenness. A flexible long plate is used which has a large number of lines and is engraved at desired intervals in the length direction to weaken bending rigidity. For example, in the case of a flexible long plate made of plywood, since the fiber direction of the core plate having large bending strength arranged in the center of the plywood is oriented in the length direction of the long plate, this core It is a long plate whose bending rigidity is weakened by grooving it across the plate.

[0003]

However, since the single plate layer (addition core plate) on the upper layer side of the core plate is oriented in the direction orthogonal to the core plate, that is, in the width direction of the long plate, the fiber direction thereof. In the groove which reaches the lower surface of the splicing plate or the inside of the veneer layer by dividing the core plate, the length direction becomes parallel to the fiber direction of the veneer layer, It has a drawback that the scale plate is easily broken along the groove. Therefore, it is extremely difficult to obtain such a flexible long plate from a large size plywood (90 × 180 cm or more) with high productivity. What is required is that a large number of grooves penetrating in the width direction are preliminarily formed on the back surface of a large-sized plywood to a depth reaching the upper layer veneer in which the fiber direction faces the groove direction. And because the large size plywood has a large weight, for example, when handling
When both ends of the plywood in the lengthwise direction are supported, the bending load is concentrated on the central portion in the lengthwise direction, and the plywood is broken from the groove before processing.

Therefore, after dividing a large-sized plywood into a plurality of long plates, a groove in the width direction must be carved on the back surface of the long plate, which lowers productivity. there were. In addition, a floor board made of a laminated board in which a decorative material is provided via MDF (medium density fiber board) or a vibration damping sheet on plywood is known. Also in this floor board, the core board of the plywood is cut from the lower surface. If a groove reaching the lower surface or the inside of the wood fiberboard of the upper layer is engraved, the toughness may be reduced or the strength may be insufficient and the groove may be broken. Further, even if these damages are not apparent in appearance, there is a problem that the damaged parts rub against each other after being laid on the floor to generate a sound. The present invention has been made in view of the above problems, and an object thereof is to divide a long plate that is excellent in flexibility but hard to break into small-sized plate-like bodies into small pieces. The present invention provides a method for manufacturing a flexible long plate that can be obtained easily and efficiently.

[0005]

In order to achieve the above object, the method for manufacturing a flexible elongated plate of the present invention is a core plate in which the fiber direction is oriented at least on the surface layer side parallel to one side. On the back surface of a large-sized rectangular composite plate-shaped body on which a wood veneer is arranged, a diagonal groove in a diagonal direction with respect to the sides of the rectangular composite plate-shaped body is formed to a depth at which the wood veneer is divided. It is characterized in that it is divided into a plurality of long plates by cutting a plurality of strips parallel to each other, and then cutting this rectangular composite plate-like body parallel to the sides at desired width intervals. is there. Also,
The invention according to claim 2 is, on at least the surface layer, on the back surface of a large-sized rectangular composite plate-shaped body, in which a wood veneer serving as a core plate whose fiber direction is parallel to one side is arranged. A large number of parallel slanting grooves are formed parallel to each other to a depth that divides the wood veneer, and then slanting grooves intersecting the slanting grooves diagonally with respect to the sides of the rectangular composite plate-like body. Is formed in parallel with each other, and then the rectangular composite plate-like body is cut into a plurality of long plates by cutting the rectangular composite plate-like body in parallel with sides at desired width intervals. It is a thing.

Further, in the invention described in claim 3, in the above invention, after the oblique groove is formed on the back surface of the rectangular composite plate-shaped body, the sheet-shaped article is formed on the back surface of the rectangular composite plate-shaped body. Is adhered, and thereafter, the rectangular composite plate-shaped body is cut into a plurality of long plates by cutting the rectangular composite plate-shaped body in parallel with the sides at desired width intervals. In the invention described in 4, when the rectangular composite plate-shaped body is divided into long plates, the rectangular composite plate-shaped body is passed through an intersection of the oblique grooves engraved in directions intersecting with each other. It is characterized in that it is cut parallel to the side of. Further, the invention according to claim 5 is characterized in that, after the long plate is divided into small pieces, the long plate is actually processed to manufacture a floor material.

[0007]

[Function] When forming a large number of rectangular composite plate-like bodies on the back surface, a large number of oblique grooves oblique to the sides are engraved to a depth at which the core plate is divided. In the state of intersecting with the fiber direction of the core plate, the thickness of the veneer between the groove bottom and the surface of the core plate is improved despite the fact that the groove engraving improves the flexibility and familiarity. The wood fiber intersecting with the groove of (1) exhibits a large bending strength against cracking as compared with the case where the groove and the fiber direction are parallel to each other. Therefore, the large-sized rectangular composite plate-shaped body after processing the oblique groove is less likely to be broken even during handling, and after processing the oblique groove, the large-sized rectangular composite plate-shaped body is separated at desired width intervals. It can be cut into small pieces and easily divided into multiple long plates.

Further, if the oblique groove and a large number of oblique grooves intersecting with the oblique groove are engraved on the back surface of the rectangular composite plate, a good balance can be obtained, so that the oblique groove is divided into small pieces. It is possible to give the obtained long plate an even flexibility over the entire surface in the twisting direction as well as the conformability. In obtaining such a long plate, when a large-sized rectangular composite plate-shaped body after processing both oblique grooves is subdivided into a plurality of long plates, as described in claim 4, If you cut parallel to the side so as to pass through the intersection of these oblique grooves, the triangular part surrounded by these adjacent oblique grooves and the intersection will have the maximum width. In the above, the edge portion of the long plate can be formed at the edge portion where chipping is unlikely to occur, and the actual processing can be performed accurately on the edge portion.

[0009]

Embodiments of the present invention will now be described with reference to the drawings.
1 and 2, 1 is 90 cm in width and 180 c in length
A large rectangular rectangular composite plate having a size of m or more, and a diagonal groove 2 (hereinafter referred to as "necessary") which is obliquely formed on the back surface of the rectangular composite plate 1 in FIG. 1 at a desired angle with respect to one side. 2) is formed in parallel with each other at small intervals, and in FIG. 2, a right-down diagonal groove 3 inclined in a direction intersecting with the right-up diagonal groove 2 is further formed. A large number of threads are formed in parallel with each other at the same intervals as the obliquely upward slant groove 2. Then, for example, the rectangular composite plate body 1
Is a large size of 90 × 180 cm, cut the part indicated by the two-dot chain line that divides it into three equal parts in the width direction in the figure, and cut X to make three flexible lengths with a width of 30 cm and a length of 180 cm. Plates 1a, 1b, 1c
However, if it is a floor board, the width is appropriately selected between 10 and 60 cm.

As the rectangular composite plate body 1, for example, FIG.
As shown in FIG. 5, a laminated plate having a decorative layer 4 provided on the surface of a 5-ply plywood is used. A plywood, particle board, MDF, etc. are combined to form a core plate in which at least the fiber direction is parallel to one side. A laminated board formed by arranging the wood veneer 12 may be used. The decorative layer 4 is formed by attaching a decorative veneer, a resin-injected wood veneer, or an appropriate decorative sheet such as vinyl chloride or melamine.

In order to engrave the oblique grooves 2 and 3 as described above in such a rectangular composite plate-like body 1, as shown in FIG.
A cutting device, in which circular cutting blades 22 are attached to a rotary shaft 21 at regular intervals in a state in which a rectangular composite plate-shaped body 1 is to be engraved and is obliquely directed according to the inclination angles of the oblique grooves 2 and 3. By feeding it, one oblique groove 2 is engraved. When the other oblique groove 3 that intersects the oblique groove 2 is engraved, the oblique groove 2 is engraved, and then the rectangular composite plate body 1 is inclined in the opposite direction to the above. It can be formed by sending it to the cutting device in the closed state. Note that, as shown in FIG. 1, there may be a portion where the oblique groove 2 is not provided in the corner portion of the rectangular composite plate body.

As shown in FIG. 3, the depth of each of the oblique grooves 2 and 3 is such that the wood veneer 12 serving as the core material is divided from the back surface of the rectangular composite plate 1 and is added above it. Wood veneer to be the core plate
Engraved to a depth of 11 thickness. That is,
The core plate 12 made of a wood veneer arranged in the center of the rectangular composite plate body 1 has its fiber direction oriented parallel to the length direction of the rectangular composite plate body 1. Since the long boards 1a to 1c when divided into small pieces have a large bending rigidity, the core board 12 is cut and the wood veneer above it is cut.
The oblique grooves 2 and 3 are engraved so as to reach the inside of the groove 11 to weaken the bending rigidity and impart flexibility and conformability to the construction surface. The oblique grooves 2 and 3 may be grooves having a depth reaching the upper surface of the wood veneer 11 serving as the core plate.

The sloping grooves 2, 3 with respect to the long side of the rectangular composite plate 1 have an incision angle of 20 to 70 °, preferably 30 to 60 °.
In short, the fiber direction is the width direction of the rectangular composite plate body 1, that is, the fiber direction of the wood veneer 11 on the core plate 12 arranged so that the fiber direction is orthogonal to the core plate 12. It should be crossed and carved. Therefore, even if the fiber direction of the wood veneer 11 is oriented in the length direction of the rectangular composite plate body 1, if the oblique grooves 2 and 3 are engraved at the above angle, the wood veneer 11 intersects the fiber direction. be able to.

As shown in FIG. 5, after a large number of oblique grooves 2 inclined in one direction or oblique grooves 2 and 3 intersecting with each other are engraved on the back surface of the rectangular composite plate-like body 1 as described above. Then, one sheet 5 is attached to the entire back surface of the rectangular composite plate 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 at a constant width interval in parallel with its long side by an appropriate cutting blade or saw, and a plurality of flexible long strips (three in the figure) are cut. Plates 1a, 1
b and 1c are obtained.

At the time of this cutting, since the sheet-like material 5 is adhered to the back surface of the rectangular composite plate-like body 1 in advance as described above, the sheet-like material 5 prevents the cut end face from being chipped or the like. can do. The sheet-like material 5 is a resin sheet or paper that is flexible and is compatible with fine uneven surfaces, or rubber that has flexibility and familiarity as well as soundproofing, urethane foam, polyethylene foam, foamed rubber, and non-woven fabric. Sheets such as woven cloth are used. Further, in the case of the rectangular composite plate-shaped body 1 in which the back surface is provided with the oblique groove 2 in only one direction, no matter which part in the width direction is cut in the length direction, the adjacent oblique groove 2, 2 has a constant width interval, but in the case of a rectangular composite plate-shaped body 1 in which an oblique groove 2 rising to the right and an oblique groove 3 descending to the right are carved, both oblique grooves 2 are formed. Three
By intersecting with each other, a large number of parallelogrammic portions 6 each having a rhombic shape, a square shape, or the like surrounded by grooves on all sides are formed on the back surface of the rectangular composite plate-shaped body 1.

Therefore, as shown in FIG. 6, when the rectangular composite plate-like body 1 is cut at a portion deviated from the intersection O of both oblique grooves 2 and 3, both oblique grooves 2 adjacent to the cutting line c are cut. The length of the triangular portion 6a surrounded by the three groove portions in the direction of the cutting line X becomes short, and the triangular portion 6a is formed into a small triangular portion 6a, and this portion is likely to be missing. If the above-mentioned sheet-like material 5 is attached, this chipping can be prevented. In addition, as shown in FIG. 2, both oblique grooves 2 and 3 are engraved so that the intersections come to the edges in the length direction of the rectangular composite plate body 1, and the intersections of the oblique grooves 2 and 3 are formed. It is cut in parallel with the side of the rectangular composite plate-shaped body 1 through the.

As shown in FIG. 7, the long plates 1a to 1c thus subdivided in this manner are adjacent to the oblique grooves 2 and 3 and the cutting line X or the rectangular composite plate 1 on the long side thereof. The triangular part 6a surrounded by the long sides of the parallelepiped part 6 has a maximum width obtained by dividing the parallelogram part 6 into two parts, and a long plate is manufactured in which the triangular part 6a is less likely to be lost during handling or actual processing. It is possible. Next, a male floor 7 and a female floor 8 as shown in FIG. 8 are formed on the four end faces of the long boards 1a to 1c to manufacture a flexible long floor board. FIG. 9 is the same as the long floor boards 1a to 1c described above, except that an upper layer of a medium specific gravity fiber board 11 'is provided on the upper surface of a wood veneer 12 which is a core board. In short, the slant groove 2, at a depth that divides the wood veneer 12 that becomes the core plate,
3 should be provided.

Next, a 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-mentioned manufacturing method, and the same size and same as this long plate. The test results of the bending strength and the conformability with a long plate (referred to as B) made of a material and having a groove parallel to the width direction on the back surface are shown. Both of the long plates A and B are 5-ply plywood with a thickness of 9 mm and have a width of 50 mm and a length of 266 mm.
The back side of the is at an angle of 45 ° to the side and the pitch is 44.4 mm
Therefore, diagonal grooves having a depth of 6 mm are provided in an intersecting manner, while grooves having a depth of 6 mm are provided on the back surface of the long plate B in a direction perpendicular to the long sides and at a pitch of 50 mm. .

Supporting pitch of these long plates A and B is 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 has 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 has a bending strength of about twice. Was.
Further, 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 those of the long plates A and B are lifted,
The lifting height for both ends to rise above the ground was 10 to 15 cm. From this, it was revealed that the familiarity was almost 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 which is a core plate in which the fiber direction is parallel to one side is arranged. On the back surface of the rectangular-shaped composite plate-shaped body, a large number of parallel grooves are formed on the back surface of the rectangular-shaped composite plate-shaped body up to a depth that divides the wood veneer. After that, since this rectangular composite plate-like body is cut into a plurality of long plates by cutting at a desired width interval in parallel with the sides, the oblique groove and the fiber direction of the wood veneer. Since they intersect, the wood fibers in the upper part of the groove bottom of this oblique groove make the bending resistance in the oblique groove part greater than in the case where the groove and the fiber direction are parallel. The large-sized rectangular composite plate body in 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.
In addition, since the flexible long plate that has been divided into small pieces is also difficult to break, no floor squeal is generated after floor laying.

Further, as described in claim 2, the oblique groove and the oblique groove intersecting with the oblique groove are formed on the back surface of the rectangular composite plate-like body, whereby the whole structure is improved. It is possible to obtain a well-balanced long plate that exhibits even flexibility and familiarity. Further, according to the invention described in claim 3, after the oblique groove is formed on the back surface of the rectangular composite plate body, the sheet-like material is attached to the back surface of the rectangular composite plate body. Therefore, at the time of subdividing into a plurality of long plates, the end portions are reinforced by the sheet-like material, and it is possible to prevent the cut end surface portions from being chipped or dropped from the oblique grooves.

Moreover, when the rectangular composite plate-like body is subdivided into the long plates as in the invention described in claim 4, the rectangular composite plate-like body is cut parallel to the side so as to pass through the intersection of the oblique grooves. For example, the maximum width can be made in the triangular part surrounded by these diagonal grooves and the intersections that are adjacent to each other, and therefore the edge of the long plate should be formed on the edge that is unlikely to cause chipping. When the long plate is processed into the floor plate, the actual processing of the edge portion can be easily and accurately performed.

[Brief description of drawings]

FIG. 1 is a back side view of a rectangular composite plate-shaped body having a backside groove engraved in only one direction.

FIG. 2 is a back view of a rectangular composite plate-shaped body in which oblique grooves are formed on the back surface in directions intersecting with each other.

FIG. 3 is a partially omitted enlarged vertical sectional view,

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

FIG. 5 is an enlarged vertical cross-sectional view of a rectangular composite plate-like body having a sheet-like material adhered to its back surface, partially omitted

FIG. 6 is a partially enlarged rear view of a case where a portion of the oblique groove that is displaced from the intersection is cut.

FIG. 7 is a partially enlarged back view of a case where an intersection of oblique grooves is cut,

FIG. 8 is a partially enlarged sectional view of a long floorboard,

FIG. 9 is a partially enlarged cross-sectional view of a long floor board of a modified example.

[Explanation of symbols]

 1 Rectangular composite plate 1a, 1b, 1c Long plate 2, 3 Diagonal groove 5 Sheet material 11 Wood veneer (saddle board) 12 Wood veneer (core board)

Claims (5)

[Claims] 1. A rectangular composite plate having a large size in which a wood veneer serving as a core plate in which a fiber direction is parallel to one side is arranged on at least a surface layer side, and the rectangular composite plate is provided on the back surface of the rectangular composite plate. A large number of parallel slanting grooves are formed in parallel with each other to a depth at which the wood veneer is divided into diagonal grooves that are oblique to the sides of the plate-like body, and then the rectangular composite plate-like body is formed in parallel with the side. A method for manufacturing a flexible long plate, which is characterized by cutting into a plurality of long plates by cutting at each width interval. 2. A rectangular composite plate having a large size, in which a wood veneer serving as a core plate in which the fiber direction is oriented parallel to one side is arranged on at least the surface layer side, on the back surface of the rectangular composite plate. To the depth of dividing the wood veneer, a diagonal groove diagonal to the side of the plate-like body, a large number of articles, after engraving in parallel with each other, a large number of oblique grooves intersecting the oblique groove, A flexible length characterized by being carved parallel to each other, and then being cut into a plurality of long plates by cutting this rectangular composite plate-like body parallel to the side at desired width intervals. Method of manufacturing scale plate. 3. The rectangular composite plate-shaped body is provided with the oblique groove on the back surface thereof, and then the sheet-shaped material is attached to the back surface of the rectangular composite plate-shaped body. The method for producing a flexible long plate according to claim 1 or 2, wherein the body is cut into a plurality of long plates by cutting the body parallel to the sides at desired width intervals. 4. The side of the rectangular composite plate-like body passing through the intersection of the both oblique grooves engraved in the direction intersecting each other when the rectangular composite plate-like body is subdivided into long plates. The method for producing a flexible elongated plate according to claim 2 or 3, wherein the method is performed in parallel with. 5. The method for producing a flexible long plate according to claim 1, wherein the long plate is subjected to actual processing after the long plate is divided into small pieces.