JP4299931B2 - Laminate production method using veneer veneer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a plywood using a veneer that is a single sheet by joining small pieces of rectangular or square veneer veneer (hereinafter referred to as veneer) in a direction perpendicular to the fiber direction and the fiber direction, The present invention relates to a method for producing a laminated material such as LVL (Laminated Veneer Lumber).
[0002]
[Prior art]
Conventionally, a veneer used for producing the laminated material is a single unit of a plurality of standard pieces obtained by cutting a continuous strip-like veneer obtained by cutting a log with a veneer lace into a predetermined length before or after drying. A suitable number of fixed-size single plates were adhered with an adhesive.
[0003]
[Problems to be Solved by the Invention]
However, some veneer tree species, for example, radiata pine, are severely shrunk due to drying, causing a twist in the manufactured laminated material and reducing the commercial value.
In the case of radiata pine, the branches extend from the ground at the same height in all directions in the state of standing trees, so that the single plate obtained by cutting with veneer lace has nodes 32 in the fiber direction as shown in FIG. It is in a state of being aligned on a substantially straight line in a direction perpendicular to the line. For example, a plywood manufactured using such a single plate 9 as a front plate is supported near both ends in the left-right direction with the left-right direction as the fiber direction of the single plate 9 as shown in FIG. In addition, when bent, it breaks with a relatively small force from the place where the nodes 32 are arranged, and cannot be used when strength is required.
Although not intended to directly solve these problems, the applicant of the present application previously disclosed in Japanese Patent Application Laid-Open No. 47-20306, by cutting an end length veneer into a narrow fixed size. Then, after butting in the fiber direction, cutting the narrowed single plate to the required constant dimension with an appropriate constant angle of inclination, each pair of narrowed single plate cut to the above dimensions Then, a method was proposed in which the inclined cut surfaces were sequentially cross-cut so that they were in a straight line, and the cross-cut single plate was cut to a required size to form a single plate for plywood.
However, in the above method, as shown in FIG. 12, when the narrow single plates 107, 109, 111 are abutted in the fiber direction, for example, vertically separated to form the narrow single plate W1, each of the narrow single plates 107, 109, 111 The edges 107a, 109a, 111a are not aligned on a straight line, and the edges of the narrow single plate W as a whole are uneven. Therefore, when the narrow single plates W1, 2,... Are crossed, a gap is created between the single plates that are cut off due to the unevenness, which is a drawback of the laminated material manufactured using the single plates that are crossed. As a result, the value of the product may be lowered, and the bedside itself may become impossible.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention produces a plurality of longitudinally bonded single plates by joining a plurality of single plates in the fiber direction, and then cuts each longitudinally bonded single plate with a predetermined width in parallel with the fiber direction. Then, when joining a plurality of elongated longitudinally bonded single plates in the direction orthogonal to the fiber direction, the elongated longitudinally bonded single plates obtained from the same longitudinally bonded single plate At least two sheets are joined in a state of being half-rotated in a plane parallel to the front and back surfaces of the elongated single plate to produce a vertical and horizontal bonded single plate, and the vertical and horizontal bonded single plate is bonded to another plate material with an adhesive. It is.
Also, a plurality of single plates having different lengths in the fiber direction are joined in the fiber direction to produce a plurality of longitudinally bonded single plates, and then each longitudinally bonded single plate is cut in parallel with the fiber direction at a predetermined width. When a plurality of elongated longitudinally bonded single plates are joined in the direction orthogonal to the fiber direction, at least two elongated longitudinally bonded single plates obtained from the same longitudinally bonded single plate May be manufactured by joining in a state of being half-rotated on a surface parallel to the front and back surfaces of the elongated single plate to produce a vertical and horizontal bonded single plate, and the vertical and horizontal bonded single plate may be bonded to another plate material with an adhesive.
Furthermore, when a plurality of types of single plates having different lengths in the fiber direction are bonded in the fiber direction to produce a longitudinally bonded single plate having a predetermined length, the plurality of types of single plates are bonded in a different order. A plurality of types of longitudinally bonded single plates are manufactured, and then each longitudinally bonded single plate is cut in parallel with the fiber direction with a predetermined width to obtain a plurality of elongated longitudinally bonded single plates. When joining a plurality of sheets in the direction perpendicular to the fiber direction, at least two elongated longitudinally bonded single plates are joined in an adjacent state using elongated longitudinally bonded single plates obtained from different elongated longitudinally bonded single plates. A bonded single plate may be manufactured, and the vertical and horizontal bonded single plates may be bonded to another plate material with an adhesive.
In addition, in a large number of veneers obtained by cutting a plurality of logs, the veneers obtained by cutting the same log are joined in the fiber direction to produce a longitudinally bonded veneer with a predetermined length,
Next, each longitudinally bonded single plate is cut in parallel with the fiber direction at a predetermined width to form a plurality of elongated longitudinally bonded single plates, and then when joining a plurality of these elongated longitudinally bonded single plates in a direction orthogonal to the fiber direction, At least two elongated longitudinally bonded veneers are joined adjacent to each other using elongated longitudinally bonded veneers manufactured from veneers obtained from different logs, thereby producing longitudinal and laterally bonded veneers. You may adhere | attach a board with another board | plate material with an adhesive agent.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Next, a first embodiment of the present invention will be described.
As shown in FIG. 1, by means of a veneer lace A, a radial pine log 3 having a length in the fiber direction of 930 mm, for example, which is supported and rotated by a spindle 1 is cut with a blade 5 to obtain a continuous strip veneer 7; The strip-shaped single plate 7 is cut every 1100 mm in the direction orthogonal to the fiber direction, and a large number of the fixed single plates 9 are manufactured.
Next, as shown in FIG. 2, an appropriate number of these standard single plates 9 are cut from the left end edge at the position of a one-dot chain line where the length in the fiber direction is 880 mm to form the first single plate 11.
In addition, as shown in FIG. 3, the other appropriate number of the single-size single plate 9 is 580 mm in the fiber direction from the position of the one-dot chain line where the length in the fiber direction from the left edge is 280 mm and from the position of the one-dot chain line. It cut | disconnects in two places of the position of a dashed-dotted line, and it is set as the 2nd single plate 13 and the 3rd single plate 15. FIG.
[0006]
Next, with a known vertical stripping device (not shown) for scarf-cutting both ends of the single plate in the fiber direction and joining in the fiber direction, the single-size single plate 9 so as to have a positional relationship as shown in FIG. The 1st single board 11 and the 2nd single board 13 are joined to a fiber direction, and let it be the 1st vertical joining single board 17 of each length shown in a figure.
Here, the length in the fiber direction of the fixed single plate 9a, the first single plate 11a, and the second single plate 13a after joining is shortened, but this is done when joining each single plate with the vertical peeling device, This is because the end of the single plate is cut in advance by a scarf.
As shown in FIG. 5, each of the appropriate number of longitudinally bonded single plates 17 manufactured as described above is cut at a solid line position at equal intervals of 155 mm in the direction orthogonal to the fiber direction. Then, the 1st elongate longitudinal joining single board 19a by which the lower edge was cut | disconnected, the 1st elongate longitudinal joining single board 19b by which the upper edge was similarly cut | disconnected, and the 1st elongate longitudinal joining by which the upper and lower both end edges were cut | disconnected A large number of single plates 19c are manufactured.
[0007]
On the other hand, the fixed single plate 9 and the third single plate 15 are bonded in the fiber direction so as to have a positional relationship as shown in FIG. 6, thereby forming the second longitudinally bonded single plate 21 of each length shown in the drawing. . The reason why the lengths in the fiber direction of the single plates 9a and 15a after bonding are short is the same as in the case of the first vertical bonding single plate 17.
Next, as shown in FIG. 7, each of the appropriate number of second longitudinally bonded single plates 21 manufactured as described above is cut at solid line positions at equal intervals of 155 mm in the direction orthogonal to the fiber direction. In FIG. 7 , the second elongate longitudinally bonded single plate 23a with the lower edge cut, the second elongated longitudinally bonded single plate 23b with the upper edge similarly cut, and the upper and lower opposite end edges are cut. A large number of two elongated longitudinally bonded single plates 23c are manufactured.
Next, the first elongate longitudinal joining single plate 19a, the first elongated longitudinal joining single plate 19b, one each, the first elongated longitudinal joining single plate 19c, and the two second elongated longitudinal joining single plates 23c are used. As shown in FIG.
First, the first elongate longitudinally bonded single plate 19a in the state of FIG. 5 is rotated halfway around the center of the single plate 19a in the horizontal direction on the plane parallel to the front and back surfaces of the single plate 19a, as shown in FIG. On the flat base (not shown), the first elongated vertically bonded single plate 19a is placed with the cut edge of the single plate 19a on the inside, that is, the upper side in FIG.
Next, as shown in FIG. 8, there is a gap between the second elongated longitudinally bonded single plate 23c from the cut edge side of the first elongated longitudinally bonded single plate 19a, that is, from the upper side to the first elongated longitudinally bonded single plate 19a in FIG. The two single plates 19a and 23c are joined together by a paper tape (hereinafter referred to as a gum tape) 25 to which a re-wetting adhesive is applied.
[0008]
Next, as shown in FIG. 9, the first elongated longitudinally bonded single plate 19 c is brought together with the joined second elongated longitudinally bonded single plate 23 c from the upper side of FIG.
As shown in FIG. 9, the first elongated vertically joined single plate 19c and the second elongated vertically joined single plate 23c are sequentially joined in the same manner, and finally the first elongated vertically joined single plate 19a is in the state shown in FIG. In this way, the first vertically and horizontally bonded single plate 27 is formed by bringing the second elongated vertical bonded single plate 23c already joined together from the upper side of FIG. 4 steps from the bottom half turn When joining with this gum tape 25, each edge to which each single plate 19a, 19c, 23c is joined is an edge cut as described above. Thus, there is no gap between the bonded single plates as in the prior art.
[0009]
The first vertical and horizontal spliced single plates 27 manufactured as described above are arranged in the state shown in FIG. 9, one in the state shown in FIG. 9, and the other one in the state shown in FIG. Using the bonded single plate 28, the middle plate 29 is bonded with an adhesive between the single plates 27, 28 in a state where the fiber directions are orthogonal to the single plates 27, 28, thereby producing a three-ply plywood 31.
In this plywood 31, even if the tree species is, for example, Radiata pine, as can be seen from FIG. 9, the nodes 32 are arranged in the direction perpendicular to the fiber direction from the one side edge of the first longitudinal / horizontal joining single plates 27, 28 to the other side edge. There is no continuous line in a row toward the edge.
Therefore, as shown in FIG. 11, even if a force is applied in the direction of the arrow while supporting the vicinity of both ends of the plywood 31 with the left-right direction as the fiber direction of the first longitudinal / horizontal joining single plates 27, 28, it can be easily broken. Absent.
[0010]
In addition, a single plate constituting a laminated material such as a plywood uses strength in the fiber direction, and a joining portion (hereinafter referred to as a longitudinal joining portion) generated by longitudinal joining is orthogonal to the fiber direction of the constituting single plate. In the direction, if they are continuously arranged in a straight line from the one side edge toward the other side edge, a force is applied as shown in FIG.
However, as can also be seen from FIG. 9, each longitudinal joining portion 33 of the first longitudinal / horizontal joining single plate 27 extends from one side edge to the other side edge in a direction perpendicular to the fiber direction of the first longitudinal / horizontal joining single plate 27. Since they are not continuous, the plywood 31 is not easily broken even when the force is applied.
[0011]
Furthermore, even when using a veneer single veneer with a large twist when drying, such as Radiata Pine, the first vertical / horizontal bonded veneers 27 and 28 divide the veneer cut veneer into fine parts. In addition, since the position of each part is changed in the fiber direction and the direction orthogonal to the fiber direction, the twist is dispersed and does not increase, and the commercial value of the plywood 31 does not decrease.
In addition, when a single plate located symmetrically in the thickness direction with respect to the center in the thickness direction of the laminated material has a weak portion on the same line in the thickness direction, the force as shown in FIG. 11 is also applied. When it is received, it tends to break from the part.
However, in the embodiment of the present invention, since the two first longitudinal / horizontal joining single plates 27 and 28 constituting the plywood 31 are reversed to each other as described above, the thickness direction, that is, the upper and lower sides in FIG. The vertical joints 33 do not line up on the same line in the direction, and this problem is also solved.
[0012]
Next, a modified example of the present invention will be shown.
1. In the first embodiment, as shown in FIGS. 2 and 3, a fixed single plate 9 obtained by cutting with a veneer lace is cut at a predetermined length in the fiber direction to obtain a first single plate 11, Although the second single plate 13 and the third single plate 15 are used, when cutting with the veneer lace A shown in FIG. You may make it obtain a board.
2. In a large number of veneers obtained by cutting a plurality of logs, the veneers obtained by cutting the same log are joined in the fiber direction to produce a longitudinally bonded veneer with a predetermined length. Then, each longitudinally bonded single plate is cut in parallel with the fiber direction at a predetermined width to form a plurality of elongated longitudinally bonded single plates, and then, when joining a plurality of these elongated longitudinally bonded single plates in a direction orthogonal to the fiber direction The at least two elongated longitudinally bonded veneers are joined adjacent to each other using the elongated longitudinally bonded veneers manufactured from the veneers obtained from different logs, and the longitudinal and laterally bonded veneers are manufactured. A single plate may be bonded to another plate material with an adhesive.
[0013]
【The invention's effect】
As described above, according to the present invention, a plurality of longitudinally bonded single plates are manufactured by bonding a plurality of single plates in the fiber direction to a longitudinal and laterally bonded single plate that is bonded to another plate material with an adhesive. The bonded single plate is cut in parallel with the fiber direction at a predetermined width to form a plurality of elongated vertical bonded single plates, and then a plurality of these elongated vertical bonded single plates are manufactured by bonding in a direction orthogonal to the fiber direction. The edge of the longitudinally bonded single plate is straight and has no irregularities. Therefore, even when bonded in the direction perpendicular to the fiber direction, there is almost no gap between the elongated longitudinally bonded single plates, and the laminated material manufactured using the bonded single plates is also free of defects.
[Brief description of the drawings]
FIG. 1 is an explanatory plan view of a first embodiment of the invention.
FIG. 2 is an explanatory plan view of a single plate.
FIG. 3 is an explanatory plan view of a single plate.
FIG. 4 is an explanatory plan view of a bonded state of single plates.
FIG. 5 is an explanatory plan view of a cut state of a single plate.
FIG. 6 is an explanatory plan view of a bonded state of single plates.
FIG. 7 is an explanatory plan view of a cut state of a single plate. FIG. 8 is an explanatory plan view of a bonded state of a first elongated longitudinally bonded single plate 19a and a second elongated longitudinally bonded single plate 23c.
FIG. 9 is an explanatory plan view of a bonded state of single plates.
FIG. 10 is an explanatory plan view of a bonded state of single plates.
FIG. 11 is an explanatory side view of a pressed state of a plywood.
FIG. 12 is an explanatory plan view of the prior art.
[Explanation of symbols]
1 .. Spindle 3... Wood 5.. Blade 7.. Strip-shaped veneer 9.. Fixed veneer 11.. 1 veneer 13.. 2 veneer 15. The first longitudinally bonded single plate 19a ... The first elongated vertically joined single plate 19b ... The first elongated vertically joined single plate 19c ... The first elongated vertically joined single plate 21 ... The second vertically joined single plate 23a ... Elongated longitudinally bonded single plate 23b .. 2nd elongated longitudinally bonded single plate 23c .. 2nd elongated longitudinally bonded single plate 25 .. Gum tape 27 .. 1st longitudinally and transversely bonded single plate 28 .. 1st longitudinal and longitudinally bonded single plate 29. Middle plate 31 .. Three-ply plywood 32 .. Node 33 .. Vertical joint 35 .. Third vertical joint single plate 37 .. Third vertical and horizontal joint single plate

Claims (4)

A plurality of veneer veneers are joined in the fiber direction to produce a plurality of longitudinally bonded veneer veneers,
Next, each longitudinally bonded veneer veneer is cut in parallel with the fiber direction with a predetermined width to obtain a plurality of elongated longitudinally bonded veneer veneers,
Then at least two of these elongated plurality of vertical junction veneer the time of joining in the direction perpendicular to the fiber direction, the elongate vertical joint veneer obtained from the same longitudinal bonding veneer, said elongated vertical junction A veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer
A method for producing a laminated material using a veneer single plate in which the vertical and horizontal bonded veneer single plate is bonded to another plate material with an adhesive. A plurality of veneer veneers with different lengths in the fiber direction are joined in the fiber direction to produce a plurality of longitudinally bonded veneer veneers,
Next, each longitudinally bonded veneer veneer is cut in parallel with the fiber direction with a predetermined width to obtain a plurality of elongated longitudinally bonded veneer veneers,
Then at least two of these elongated plurality of vertical junction veneer the time of joining in the direction perpendicular to the fiber direction, the elongate vertical joint veneer obtained from the same longitudinal bonding veneer, said elongated vertical junction A veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer veneer
A method for producing a laminated material using a veneer single plate in which the vertical and horizontal bonded veneer single plate is bonded to another plate material with an adhesive. When a plurality of types of veneer veneers with different lengths in the fiber direction are joined in the fiber direction to produce a longitudinally bonded veneer veneer with a predetermined length, the veneer veneers with different lengths are joined in a different order. To produce multiple types of vertically bonded veneer veneer,
Next, each longitudinally bonded veneer veneer is cut in parallel with the fiber direction with a predetermined width to obtain a plurality of elongated longitudinally bonded veneer veneers,
Next, when joining a plurality of these elongated longitudinally bonded veneer sheets in the direction orthogonal to the fiber direction, at least two elongated longitudinally bonded veneer sheets are elongated longitudinally bonded veneers obtained from different elongated longitudinally bonded veneer sheets. A veneer veneer veneer is manufactured by joining in a state adjacent to each other using a veneer,
A method for producing a laminated material using a veneer single plate in which the vertical and horizontal bonded veneer single plate is bonded to another plate material with an adhesive. In a large number of veneer veneers obtained by cutting a plurality of logs, the veneer veneers obtained by cutting the same log are joined in the fiber direction to produce longitudinally bonded veneer veneers of a predetermined length. And
Next, each longitudinally bonded veneer veneer is cut in parallel with the fiber direction with a predetermined width to obtain a plurality of elongated longitudinally bonded veneer veneers,
Next, when joining a plurality of these elongated longitudinally bonded veneer sheets in the direction perpendicular to the fiber direction, at least two elongated longitudinally bonded veneer sheets are elongated longitudinally manufactured from veneer single sheets obtained from different logs. A veneer veneer veneer is manufactured by joining the veneer veneer adjacent to each other.
A method for producing a laminated material using a veneer single plate in which the vertical and horizontal bonded veneer single plate is bonded to another plate material with an adhesive.

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