JPH01166901A - Veneer laminated material and manufacture thereof - Google Patents

Abstract

PURPOSE: To obtain a veneer laminate material of a low cost having an excellent quality without defects in the front and rear layers by deviating to stepwisely superpose by a butt joint of a core veneer of an intermediate layer, and deviating to stepwisely superpose by a skirt joint of front and rear veneers. CONSTITUTION: A intermediate layer C over at least two layers or more is made of a core veneer 1 shaped at both butt ends to a predetermined marked size 1. And, the veneer 1 is laminated and adhered to be deviated to be stepwisely superposed in a fibrous direction. And, at least one or more layers of front and rear layers F, B are cut in a scarf of an oblique surface S comparatively at both butt ends, and the overall length is formed of front and rear veneers 2 shaped to a predetermined extending size (1+S) added with the oblique surface S of the scarf to the marked size 1 of the core veneer 1. The veneers 2 are scarf-joined in a fibrous direction and laminated to be adhered to be deviated to be stepwisely superposed together with the core veneer 1.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a veneer veneer prepared by shaping both ends of the wood to a predetermined score dimension and a predetermined elongation dimension with a contrasting scarf slope. This is a veneer laminate material made by laminating and adhering the laminates in a staggered manner in the fiber direction, commonly known as LVL (laminated veneer lumber) or LVB (laminated veneer board). The invention relates to materials and methods of manufacturing the same.

(2) Prior art The prior art of this type of laminated veneer material and its manufacturing method includes, for example, Japanese Patent Laid-Open No. 61-24 filed by the patent applicant.
Laminated veneer material No. 1101, Laminated veneer material No. 1101, Laminated veneer material No. 61-258702, Laminated veneer material No. 134201, Continuous laminated material using rectangular veneers and manufacture thereof A veneer laminate material and its manufacturing method disclosed in Japanese Patent Application Laid-open No. 62-284702@Method and apparatus for manufacturing veneer laminate material are known.

f) Problems to be Solved by the Invention However, in the prior art laminate veneer material and its manufacturing method, the structure of the core veneer serving as the intermediate layer is [a rectangular long veneer whose fiber direction is parallel to the long side direction]. The edges of the boards or square veneers are processed into slits, and the slits are overlapped in the long side direction and arranged vertically, and the overlapped slits are arranged as appropriate for each layer. In other words, the core veneer that is the middle layer is made by cutting the ends of both ends into scarves with contrasting slope extension dimensions, and then attaching the core veneers in a stair-like manner. The structure of the front and back veneers, which are the front and back layers, is [rectangular long veneer with the fiber direction parallel to the short side direction or long side direction, or square shape. consisting of front and back veneers in which the end surfaces or butt ends of the veneers are butted against each other and arranged horizontally or vertically, and the end surfaces or butt ends of the veneers are pasted so that the butt points are aligned in the same vertical position.
That is, the front and back veneers made of butt joints, which are the front and back layers, are cut so that both end surfaces or both ends thereof are cut shorter than the extension dimension of the core veneer made of the scarf joints of the intermediate layer [stair-shaped staggered stacking]. Butt joints] or laminated and glued so that the entire core veneer and front and back veneers form a stepped staggered scarf joint. The dimensions of the product produced by the laminated veneer material and its manufacturing method are such that the core veneer and front and back veneers of the middle layer and front and back layers are marked in the fiber direction obtained by cutting the veneer with ordinary veneer lace. The dimensions of the entire product are always shortened by the amount required for overlapping the scarf joints, which causes a reduction in production yield. However, in the case of the butt joint, there was a serious problem in that the joints visible from the front and back had obvious gaps and overlapping parts, which caused a decrease in the product value. In order to eliminate such difficulties, the core veneer, which is the intermediate layer and is consumed in large quantities, is made into a ``stair-like staggered butt joint'' with the prescribed creasing dimensions when cutting the veneer. The production yield has been significantly improved by eliminating the need for extra trimming and preparation.In addition, for the front and back veneers, which are the front and back layers, and which consume relatively little, both ends of the front and back veneers can be fabricated with a scarf with an extension dimension of contrasting slopes. A combination of fr-standard joint configurations that are cut into a "step-like staggered scarf joint" and eliminate gaps and overlaps between the seams that are visible from the front and back sides, thereby significantly increasing the product value. This is a veneer laminated material and its manufacturing method.

Means for Solving the Problem The present invention configures the core veneer serving as the intermediate layer into a "stair-like staggered butt joint" while keeping the predetermined score dimensions at the time of cutting the veneer, In addition, for the front and back veneers that form the front and back layers, the veneer laminated material is constructed by cutting the ends of both ends into scarves with contrasting slope extension dimensions to form a one-step staggered scarf joint, and its production. 1-(l) For the intermediate layer and the front and back layers of the laminated veneer material of the present invention, the intermediate layer is made of at least two layers, and the intermediate layer is formed by forming the side ends of the intermediate layer with predetermined lines. The intermediate layer consists of a core veneer shaped to dimension U), which is made into a butt joint in the fiber direction and laminated and bonded in a staggered manner.

1-b) Front and back layers The front and back layers, which cover at least one layer, are cut into a scarf with a slanted side with a contrasting side end. It consists of front and back veneers shaped to a predetermined extension dimension (J!+S) including the slope ■, and the front and back veneers are made into a scarf joint in the fiber direction and laminated together with the core veneer in a stepped staggered manner. The front and back layers are glued together.

2-(l) Core veneer preparation process A core veneer preparation process in which the wood end of one or both sides of the core veneer is cut to a predetermined score dimension U).

2-b) Preparation process of front and back veneers Cut both ends into scarves with contrasting slopes (■), and cut the entire length to a predetermined value obtained by adding the scarf slope (s) to the score dimension U) of the core veneer. Preparation process for front and back veneers to have an elongated dimension (l+S).

2-C) Adhering process of core veneer and front and back veneers Apply adhesive to one or both sides of the core veneer prepared to the predetermined dimensions and the required one side of the front and back veneers, and attach the core veneer to the desired size. is used as an intermediate layer, and the front and back veneers are used as front and back layers, respectively, in a stepwise staggered manner at a pitch of the ruled dimension (l) of the core veneer in the fiber direction.

It is composed of.

(E) Function The core veneer used in the intermediate layer of the present invention is prepared as follows. That is, as illustrated in Fig. 3, when cutting a veneer with veneer lace, the fiber direction is determined by the creasing dimension (
The core veneer 1 is prepared by setting a scoring knife and cutting it so that the shape becomes 1), and the core veneer 1 is square or rectangular in the appropriate dimensions such as nominal 3 translations x 3 translations, 3rRX 6 translations, etc. and has an appropriate thickness. be. The front and back veneers used for the front and back layers are prepared as follows. That is, as illustrated in FIG. 4, when cutting a veneer lace, the fiber direction of the veneer lace is adjusted to the score line size of the core veneer 1. Slope approximately twice as large (s
) Nominal 3 translation
The front and back veneers 2 are prepared in a rectangular or rectangular shape with appropriate dimensions such as 312.31B x 6 and an appropriate thickness.

Furthermore, when producing LVB products, etc. by making the fiber directions of appropriate layers of the core veneer 1 orthogonal during lamination and bonding to form a cross band for preventing distortion, the core veneer 1 may be replaced with the core veneer 1 as shown in FIG. The wood width dimension in the direction perpendicular to the fiber direction (
l), with both end faces recut using a double saw, etc., nominally 31NX3.

3VRXl! The core veneer 3 for a cross band is prepared from the initial core veneer 1 into a rectangular or rectangular core veneer 3 having an appropriate thickness and having an appropriate size.

The rationale for cutting the water width dimension (6) of the crossband core veneer 3 to be slightly shorter than the creasing dimension C1) is when the adhesive is applied to the crossband core veneer 3. This is to safely absorb the extension of water in the water width direction.

Of the core veneer 1, front and back veneers 2, or cross band core veneer 3 prepared to the predetermined dimensions, the core veneer 1 or the cross band core veneer 3 is simply As an intermediate layer of laminated board materials, the core veneers 1 are arranged in series in a butt joint with their butt ends or end faces facing each other in the fiber direction, and the core veneers 3 for the cross band are arranged in series with their butt joints facing each other in the fiber direction. Convert it to a right angle and make it staggered over at least two layers, for example, continuously staggered so that the butt joints are distributed in a stair-like manner of about 30 to 70 times the board thickness. It is laminated and bonded,
In addition, the front and back veneers 2 are used as the front and back layers of the laminated veneer material, and the scarf slopes (s) formed at both ends are overlapped with each other, and at least one layer is staggered in a step-like manner. The sheets are stacked one on top of the other and are continuously laminated and bonded in a staggered manner so that the scarf joints are dispersed in a stepwise manner, for example, about 30 to 70 times the board thickness.

EXAMPLE An example of the veneer laminated material and its manufacturing method according to the present invention is shown in Figures 1 and 2, and an example of a manufacturing apparatus for carrying out the manufacturing method is shown in Figures 6 to 8. In other words, in the case of the veneer laminate material of the present invention, commonly known as LVL, in which all the fiber directions are configured parallel to the longitudinal direction of the product, the veneer laminate material of the present invention is shown in FIG. As shown, the intermediate layer (O) is made up of a large number of core veneers 1 with both ends of the core veneers 1 adjusted to a predetermined score size (l), and the core veneers 1 are made of core veneers 1 with their ends butted against each other in the fiber direction. For example, the butt joints are formed at a pitch of about 30 to 70 times the board thickness (1) so that the butt joints are stacked in a stair-like manner over at least two layers. It is stacked and glued continuously in the longitudinal direction in dispersed staggered layers, and the front and back layers (F) and (B) are cut into a scarf with a slope ■ that has contrasting grains on both sides, and its entire length is The core veneer 1
It consists of a large number of front and back veneers 2 prepared to have a predetermined elongation dimension (1+3>), which is the ruled dimension (, l) plus the slope ■ of the scarf, and the front and back veneers 2 have mutual slopes 6 in the fiber direction. At least 1
The core veneer 1 is stacked in a staggered manner over more than one layer, that is, as in the case of the core veneer 1, the thickness is +1>30.
The scarf joints are staggered and stacked in a stepwise manner with a pitch (P) of about 70 times to about 70 times, and are continuously laminated and bonded in the longitudinal direction.

Furthermore, the fiber direction of the appropriate layers of the core veneer 1 of the present invention is made perpendicular to the longitudinal direction of the product to form a cross band.
In the case of laminated veneer material commonly known as VB, as shown in Figure 2, the core veneer that constitutes most of the middle @ At the same time, this is laminated and bonded to the core veneer 1 which is made into a butt joint with the butt joints facing each other in the fiber direction. A cross band core veneer 3 re-prepared by cutting in a direction perpendicular to the fiber direction is interposed in the wood width dimension (l) which is the same as or slightly shorter than the crease dimension (in the fiber direction). This is made into a butt joint with the end faces facing each other in the direction orthogonal to the direction, and is stacked continuously in a staggered manner with the front and back veneers 2, as in the case of the veneer laminated material commonly known as LVL. They are laminated and bonded in the longitudinal direction.

Therefore, when industrially producing laminated veneer materials commonly referred to as LVL or LVB with the above-mentioned configuration, steps 6 to 8 are required.
A series of manufacturing equipment as illustrated in the figure is used from the stage of scarfing the veneer veneer, that is, the predetermined creasing dimension C
Core veneer 1 and front and back veneers 2 provided by cutting
are provided to an auto feeder in the supply process consisting of a robot 4 and the like, and are fed onto the carry-in conveyor 5 in accordance with the order of arrangement according to the production plan. Among the veneers loaded onto the carrying conveyor 5, the front and back veneers 2 are processed by the next step, the scarf machine 6, into a slanted surface with symmetrical slopes on both sides, for example, a slanted surface of approximately 4 to 8 degrees thicker than the veneers. The core veneer 1 that will be cut into a scarf and will become a cross band is cut by a double saw 7 in the next step to a wood width dimension (l) that is equal to or slightly shorter than the crease dimension (l). The processed and remaining core veneer 1 passes through both the scarf machine 6 and the double saw 7 and is inserted into a single-sided coating type spreader 8 made of an airless spray device or the like in the next process. Various adhesives based on urea resin, melamine resin, phenol resin, resorcinol resin, etc. are applied to one side of the required parts and then delivered to the assembly station equipped with robots 9a, 9b, etc. for assembly in the next process. Ru. The core veneer 1 that arrives at the construction station, the cross band core veneer 3 that has been reconditioned using the double saw 7, and the front and back veneers 2 that have contrasting slopes 4 formed on both ends using the scarf machine 6 are pre-processed. The robot 9a follows the mechanism order set according to the production plan.
, 9b, the veneer laminated material is arranged in a stair-like staggered manner on the carry-in conveyor 10 for the next heat-pressing process, and is sequentially inserted into the high-frequency tack press 11 and the continuous hot press 12, and is pressed and heated to produce a continuous veneer laminate. The laminates are laminated and bonded to a veneer laminate 13, which is then cut into appropriate dimensions using a cross-cut saw 14 in the next step, and stacked using an auto stacker 15 or the like, thereby completing a series of steps for producing a series of veneer laminates.

(G) Effects of the Invention As mentioned above, the present invention provides for the core veneer, which is consumed in large quantities as the middle layer of laminated veneer material, to be cut with predetermined marking dimensions when cutting the veneer with veneer lace. The production yield has been significantly improved by creating a "stair-like staggered butt joint" and eliminating unnecessary cutting preparations.
In addition, for the front and back veneers that are used for the front and back layers, which have relatively low consumption, the ends of both sides are cut into scarves with contrasting slope extension dimensions to create a "step-like staggered scarf joint". The product value is greatly improved by eliminating visible seam gaps and overlaps, so the core veneer of the intermediate layer of the product is compatible with conventional veneer laminates and their manufacturing methods. When the scarf joint was made into a "staircase staggered stacked scarf joint", the overall product dimensions were shortened by the amount required for stacking the scarf joints, which caused a significant reduction in production yield. The problem is that the front and back veneers of the front and back layers are made of "stair-like staggered butt joints"
The present invention has succeeded in eliminating all of the serious drawbacks in which obvious gaps and overlaps were found here and there in the seams visible from the front and back sides, which were factors that reduced the product value. Even if there are some gaps or overlaps in the joints of the intermediate layer after completion, it is acceptable, so it is possible to provide a high-quality veneer laminate with no defects on the front and back layers at an extremely low price. This is the first time that this has been put into practical use, and the effects of its implementation have been remarkable.

[Brief explanation of the drawing]

The figures show an example of the implementation of the present invention, in which Fig. 1 is a side view of an LVL product, Fig. 2 is a side view of an LVB product, Fig. 3 is a plan view of a core veneer, and Fig. 4 is a side view of an LVL product. FIG. 5 is a plan view of the core veneer for the cross band, FIG. 6 is a plan view of the manufacturing device, and FIGS. 7 and 8 are side views of the manufacturing device. 1... Core veneer, 2... Front and back veneers, 3... Core veneer for cross band, (O... Intermediate layer, (F), (B).
...Front and back layers, ■...Slope, d)...Rule dimensions, (l
+s)...extension dimension, chain...water width dimension, (day...
pitch. Patent Applicant: Hashimoto Electric Industry Co., Ltd. Procedural Letter (Voluntary Submission) November 22, 1988 Director General of the Patent Office Yoshi 1) Tsuyoshi Moon, Lord of the Case Indication of the Case 1988 Patent Application No. 326552 2, Name of the Invention Laminated board material and its manufacturing method 3, relationship with the case of the person making the amendment The "Claims" column and the "Detailed Description of the Invention" column of the patent applicant's specification. 5. Contents of amendment (1) The scope of claims will be amended as shown in the attached sheet. (2) "The creasing dimensions of the core veneer (respectively at a pitch of 11") described in lines 4 to 5 of page 9 of the specification are set to 2, and claim (1) at least The intermediate layer of two or more layers consists of a core veneer with both wood ends shaped to a predetermined crease dimension), and the core veneer is butt jointed in the fiber direction and laminated in a stepped staggered manner. At least one layer of the front and back layers is cut into a scarf with a contrasting slope ■ on both ends, and its total length is equal to the score dimension (l) of the core veneer. ) to the slope of the scarf (s)
It consists of front and back veneers shaped to a predetermined elongation dimension (l + S>), and the front and back veneers are made into a scarf joint in the fiber direction and laminated and bonded together with the core veneer in a stepped staggered manner. (2) The veneer laminate material according to claim 1, wherein the fiber directions of appropriate layers of the core veneer are orthogonal to each other at the time of lamination bonding to form a cross band. ( 3) Prepare a core veneer by cutting the end of one or both sides of the veneer as it was when it was cut, or by cutting the end of one or both sides of the end of the veneer to a predetermined crease size. The front and back veneers are prepared to a predetermined elongation dimension (l+S), which is the sum of the crease dimension (1) of the veneer and the slope of the scarf ($), and one or both sides of the core veneer prepared to the predetermined dimension and the A plugging agent is applied to each of the required sides of the front and back veneers, and the core veneer is used as the middle layer, and the front and back veneers are used as the front and back layers, and the layers are staggered at a predetermined pitch in the fiber direction. A method for producing a laminated veneer material characterized by laminating and bonding. (4) Prepare the core veneer to be made into a cross band by shaping the core veneer in the direction perpendicular to the fiber direction to a water width dimension (f') that is equal to or slightly shorter than the creasing dimension (1) of the core veneer. A method for manufacturing a laminated veneer material according to claim 3.

Claims (4)

[Claims] (1) The intermediate layer, which spans at least two layers, is composed of a core veneer with both ends shaped to a predetermined scoring dimension (l), and the core veneer is butt jointed in the fiber direction. At least one layer of the front and back layers is cut into a scarf with contrasting slopes (s) on both ends, and The total length is the score dimension (l) of the core veneer and the slope (s) of the scarf.
) The front and back veneers are formed into a scarf joint in the fiber direction and laminated and bonded together with the core veneer in a stepped staggered manner. A laminated veneer material that is characterized by (2) The veneer laminate material according to claim 1, in which the fiber directions of appropriate layers of the core veneer are orthogonally crossed during lamination and bonding to form a cross band. (3) Prepare the core veneer to a predetermined score dimension (l) by cutting the end of the veneer as it was when cutting it, or by cutting the end of one or both sides of the end of the veneer. Cutting the scarf, and preparing the front and back veneers so that the overall length thereof is a predetermined extension dimension (l + S) obtained by adding the scarf slope (s) to the ruled dimension (l) of the core veneer; Adhesive is applied to one or both sides of the core veneer prepared to the dimensions and to the required one side of the front and back veneers, and the core veneer is used as an intermediate layer, and the front and back veneers are used as the front and back layers, and the fiber direction is adjusted. A method for manufacturing a laminated veneer material, characterized in that the core veneer is laminated and bonded in staggered stacks at a pitch of the ruled dimension (l) of the core veneer. (4) A patent for preparing a core veneer to be made into a cross band by shaping the core veneer in the direction orthogonal to the fiber direction to a wood width dimension (l) that is equal to or slightly shorter than the ruled dimension (l) of the core veneer. A method for manufacturing a laminated veneer material according to claim 3.