JP2012158112A - Straight-grain glued laminated lumber and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively produce straight-grain glued laminated lumber wherein at least one of both plate surfaces does not have a gnarl or has a gnarl not larger than the upper small gnarl.SOLUTION: The straight-grain glued laminated lumber formed by laminating laminas is cut out of a prismatic wood block wherein a plurality of laminas comprising splint wood left after cutting a pillar or a beam from a log and having at least one surface not having a gnarl or having a gnarl not larger than the upper small gnarl are laminated. At least one of both plate surfaces is formed to be a straight-grain surface having no gnarl or the gnarl not larger than the upper small gnarl.

Description

  The present invention relates to a mesh laminated material used as an interior / exterior material of a building and the like, in which at least one of both plate surfaces is a mesh surface having nodes of no joints or upper and lower bars, and a manufacturing method thereof.

  As a conventional laminated material used as a building interior / exterior material and the like and a manufacturing method thereof, for example, those described in Patent Document 1 are known.

  By the way, the conventional laminated timber is made of a large number of large and small lamina (grind board) cut out from the whole log to form a plurality of elongated boards, which are then stacked into a prismatic wood block. The block is cut out by cutting in a direction in which the cut surface extends perpendicularly to the stacking direction and extends in the longitudinal direction of the wood block.

JP 2009-228361 A

  However, in such a conventional method, the lamina has a knot larger than the upper bar on an unspecified surface, and therefore, many surfaces including at least one of both plate surfaces of the laminated wood are larger than the upper bar. As a result, there was a problem that high-quality laminated lumber could not be manufactured. In addition, when a high-quality laminated material is manufactured by laminating plate materials obtained by selecting and combining jointless lamina from the entire lamina of the log, there is a problem that the material cost and the manufacturing cost increase.

  The present inventor who has worked on solving this problem is that the remaining sap from which the pillar or beam is taken from the log is not a core but a sap, so that the length of the sap is approximately incoherent or less than the upper bar. We paid attention to the fact that it is a scale plate.

  Therefore, the present invention has been made in view of the above-described points of interest, and is used as an interior / exterior material of a building, etc., and at least one of both plate surfaces has a joint with no joints or upper or lower joints. It is an object of the present invention to provide a high-quality glulam laminated lumber and a method for producing the same.

  The present invention advantageously solves the above-mentioned problems, and the grid laminated material of the present invention is a grid laminated material obtained by laminating lamina, and is composed of at least a remaining sap material obtained by removing a column or a beam from a log. A square cut out from a prismatic wood block with multiple laminas with one node on the side or no more than the upper bar, and at least one of the two sides has a node with no nodes or the upper bar It is characterized by being formed on the surface.

  Further, the method for producing a mesh laminated material according to the present invention is a method for producing a laminated glued wood by laminating, and at least both small ends are innocuous from the remaining sap material obtained by removing a column or a beam from a log. By forming a lamina with nodes below the upper bar and then laminating and laminating a plurality of laminas, at least both sides in the direction perpendicular to the stacking direction are prismatic with nodes that are no nodes or below the upper bar And cutting the wood block in a direction in which the cut surface extends perpendicularly to the stacking direction and extends in the longitudinal direction of the wood block, so that at least one of the both plate surfaces does not exist. It is characterized by cutting out a plurality of laminated timbers including two laminated timbers, which are the faces of a grid having knots or nodes below the upper bar.

  According to the grid laminated material of the present invention and the manufacturing method thereof, the sap used as the material of the laminated timber is the remaining sap obtained by removing a column or a beam from a log, which is generally incoherent or below the upper bar. Therefore, a laminated material in which at least one of the two plate surfaces is a surface of a mesh having no nodes or having no more than upper bars can be manufactured at low cost.

It is explanatory drawing which shows the procedure of one Example of the manufacturing method of the kite laminated board of this invention for the kite lamina board as one Example of the kite laminated material of this invention, and its manufacture. It is explanatory drawing which shows the characteristic of the manufacturing method of the said Example. It is explanatory drawing which shows the molder process in the manufacturing method of the said Example. It is explanatory drawing which shows the cutting process with the belt saw in the manufacturing method of the said Example. It is explanatory drawing which shows the sanding process in the manufacturing method of the said Example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Here, FIG. 1 is an explanatory view showing the procedure of an embodiment of a method for manufacturing a glazed laminated board of the present invention for manufacturing the glazed lamina board as an embodiment of the glazed laminated material of the present invention. In the manufacturing method of this embodiment, as shown in FIG. 1, the cocoon lamina board as the glazed laminated material of the above embodiment is manufactured.

  When manufacturing this laminar board, as shown in FIG. 2, a long slab left by taking a pillar or a beam from a firewood log, in particular, for example, 15 mm at a position along the four sides of the pillar or beam. A plate-like portion of × 90 mm × 4000 mm is selected into those having both small end incesses, three-side innocence, four-side innocence, and nodal ones, and among those plate-like portions, Except for those with knots, only the ones with two endless, three-sided and four-sided ones are used as lamina. The plate-like part is called shirata, and there are few nodes because it is often located outside the tip of the node that is pruned during the growth of the tree and buried inside. Because it is weak, it is not normally used for columns and beams.

  This lamina is dried and shaped into a predetermined size with a molder as shown in Fig. 3, and the lamina is applied to the inner surface as it is without being attached vertically or horizontally with finger joints or the like. Then, by stacking and pressing a plurality of sheets, a prismatic wood block having no joints on at least both sides in the direction perpendicular to the stacking direction is formed.

  Thereafter, the wood block is cut (cut) with a belt saw with a carriage as shown in FIG. 4 in a direction in which the cut surface extends perpendicularly to the stacking direction and extends in the longitudinal direction of the wood block, As shown in FIG. 5, the cut laminated material is sanded with a belt sander to smooth the surface, and each of the two laminated materials in which at least one of both plate surfaces is a surface of a jointless cell. A plurality of long laminated timbers are completed.

  Therefore, according to the grid assembly of this embodiment and the method for manufacturing the same, the sap used as the material of the assembly is the remaining sap obtained by removing a column or a beam from the cocoon log, Since it is a long plate-shaped material (white thick), as shown at the right end of FIG. 1, one or both of the two plate surfaces is a surface of an infinite cell, or even up to the two small ends It is possible to manufacture the long-sized gauze laminated timber, which is the surface of the gutter, at low cost.

  Although the present invention has been described based on the illustrated examples, the present invention is not limited to the above-described examples, and can be appropriately changed within the scope of the claims. For example, cedar logs such as Akita cedar and Yoshino cedar and paulownia logs may be used, and when selecting sapwood for lamina, knots have larger knots than upper bars In addition, the two-end infinite, three-sided, and four-sided innocents may include not only perfect instincts but also those having small knots above and below.

  In addition, the lamina is laminated without going on or off in the above embodiment, but it may be laminated after making a large one by adding or adding sapwood as required. The cutting of the wood block is not limited to the cut-and-sew, and may be performed by another type of cutting device such as a circular saw or a water jet cutter, and other processing methods are not limited to the method of the above embodiment.

  Thus, according to the grid laminated wood of the present invention and the manufacturing method thereof, the sap used as the material of the laminated timber is the remaining sap obtained by removing a column or a beam from a log, which is generally incoherent or below the upper bar. Therefore, it is possible to inexpensively manufacture a mesh laminated material in which at least one of the two plate surfaces is a surface of a mesh having no nodes or having no more than upper knots.

Claims (2)

In the glazed laminated timber made by laminating,
It is cut out from a prismatic wood block consisting of the remaining sapwood from which a pillar or a beam is taken from a log, where at least one side is laminated with a plurality of laminaes with nodes that are unjoined or below the upper measure,
At least one of both plate surfaces is formed on the surface of a mesh having no nodes or having no more than upper bars. In a method for producing a laminated glulam by laminating lamina,
From the remaining sapwood that took the pillar or beam from the log, at least both ends formed a lamina with nodes that are unjoined or below the upper measure,
By laminating and laminating a plurality of the lamina, at least both sides in the direction perpendicular to the laminating direction form a prismatic wood block with nodes that are innocuous or below the upper bar,
By cutting the wood block in a direction in which the cut surface extends perpendicularly to the stacking direction and extends in the longitudinal direction of the wood block, each of at least one of the plate surfaces is a jointless or upper bar or less A method for producing a grid laminated timber, comprising cutting out a plurality of laminated timber including two pieces of laminated timber, which is the surface of a grid having knots.

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