JPS6210802B2 - - Google Patents
Info
- Publication number
- JPS6210802B2 JPS6210802B2 JP20779A JP20779A JPS6210802B2 JP S6210802 B2 JPS6210802 B2 JP S6210802B2 JP 20779 A JP20779 A JP 20779A JP 20779 A JP20779 A JP 20779A JP S6210802 B2 JPS6210802 B2 JP S6210802B2
- Authority
- JP
- Japan
- Prior art keywords
- plywood
- veneers
- joint
- bonded
- veneer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011120 plywood Substances 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 description 18
- 238000005304 joining Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000001145 finger joint Anatomy 0.000 description 1
Landscapes
- Finished Plywoods (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
Description
【発明の詳細な説明】
本発明は接合長尺合板及びその製造方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bonded long plywood board and a method for manufacturing the same.
（従来技術の説明）
従来接合長尺合板の製造の際薄い単板を接合す
るにはバツトジヨイントあるいはスカーフジヨイ
ント方法が用いられている。このほかフインガー
ジヨイントによる接合方法も試みられたが、この
方法を薄い単板に用いると、フインガーの切削が
できないので、実用的でなく、現在は使用されて
いない。(Description of the Prior Art) Conventionally, butt joint or scarf joint methods have been used to join thin veneers in the production of joined long plywood. In addition, a joining method using finger joints has been attempted, but when this method is used for thin veneers, it is not possible to cut the fingers, so it is not practical and is no longer used.
ところでバツトジヨイントにくらべてスカーフ
ジヨイントはその接合面積が大きいので接合強度
が大きい利点を有し、現在では長尺合板の接合法
の主流となつている。 Incidentally, compared to butt joints, scarf joints have a larger joint area and therefore have the advantage of greater joint strength, and are currently the mainstream method for joining long plywood.
ところでスカーフジヨイントは第１図、第３図
に示すように合板１１の木口面１２をスカーフ切
削して形成したスカーフ面１３を突き合せ合板１
１，１１を接合する方法であるが、この方法にお
いてもなおつぎのような欠点を有する。 By the way, the scarf joint is made by cutting the end surface 12 of the plywood 11 into a scarf, and then butting together the scarf surface 13, as shown in FIGS. 1 and 3.
1 and 11, but this method still has the following drawbacks.
スカーフ面１３を突き合せたとき、スカーフ
面１３，１３相互に滑りが生じ、接合面に段違
い１４が生じ易い。このため接合強度の低下を
もたらす。また接合面から接着剤が溢れ出易
い。 When the scarf surfaces 13 are butted against each other, the scarf surfaces 13 and 13 may slip against each other, and a difference in level 14 is likely to occur on the joined surfaces. This results in a decrease in bonding strength. Furthermore, the adhesive tends to overflow from the joint surfaces.
接合強度を大きくするためスカーフ長さｌ
（第３図）を合板１１の厚みの８〜15倍としな
くてはならず、切削して破棄する部分が増大し
後記する理由から歩留りが低下する。 Scarf length l to increase bonding strength
(FIG. 3) must be made 8 to 15 times the thickness of the plywood 11, which increases the amount of parts to be cut and discarded, resulting in a decrease in yield for reasons described later.
（本発明の目的）
本発明はこのようなスカーフジヨイントによる
単板の接合法の問題点を改良したもので接合強
度、歩留、生産性の向上を企図したものである。(Objective of the present invention) The present invention improves the problems of the method of joining veneers using scarf joints, and is intended to improve joint strength, yield, and productivity.
本発明は曲げ強度などの合板強度は表裏単板
２，６に依存し、中間単板４は余り関与しないこ
とを考慮して、表裏単板２，６をスカーフジヨイ
ントにより、中間単板４，４をバツトジヨイント
により接合して合板強度、歩留の向上を図つたも
のである。 In the present invention, the front and back veneers 2 and 6 are joined by a scarf joint, taking into account that the plywood strength such as the bending strength depends on the front and back veneers 2 and 6, and that the intermediate veneer 4 is not so involved. , 4 are joined by butt joints to improve plywood strength and yield.
（本発明の構成）
上記目的を達成するための本発明の構成の要旨
は、表裏単板２，６の繊維方向を長手方向に表裏
単板２，６の間に積層された単板４，４の繊維方
向を巾方向とした接合長尺合板において、接合さ
れた合板１，１′の接合木口面７，７は合板長手
方向垂直断面Ｚ型をなし、
相対する合板１，１′の表裏単板２，６には凹
凸斜面３，３′が、上下対称に形成されるととも
に、凹凸斜面３，３′をつなぐ突き合せ面５，５
が中間積層単板４，４に形成されている、
ことを特徴とする接合長尺合板およびその製造
方法に存するものである。(Structure of the present invention) The gist of the structure of the present invention for achieving the above object is that the veneers 4, In the jointed long plywood with the fiber direction of No. 4 as the width direction, the joint end faces 7, 7 of the joined plywood 1, 1' have a Z-shaped vertical section in the longitudinal direction of the plywood, and the front and back sides of the opposing plywood 1, 1' The uneven slopes 3, 3' are vertically symmetrically formed on the veneers 2, 6, and abutting surfaces 5, 5 connecting the uneven slopes 3, 3' are formed.
is formed on the intermediate laminated veneers 4, 4.This invention resides in a bonded long plywood board and a method for manufacturing the same, characterized in that:
実施例の説明：
３プライ4m／ｍ厚の合板１を表面単板２の繊
維方向木口面に表面単板２に該単板の繊維方向と
直交する方向に任意角度の凹斜面３を形成する。Description of the embodiment: A 3-ply 4m/m thick plywood 1 is formed with a concave slope 3 at an arbitrary angle in the direction perpendicular to the fiber direction of the surface veneer 2 on the end surface of the surface veneer 2 in the fiber direction. .
凹斜面３部分の長さＬは該単板厚みの２倍〜15
倍の角度で形成することが好ましい。なぜならば
斜面３部分の長さＬを単板厚みの２倍以下にする
とその接合面はバツトジヨイント方法による接合
面と強度と何等かわりなくなつてしまうからであ
る。また、凹斜面３部分の長さＬを単板厚みの15
倍以上とすると切削加工が難かしくしかも接合面
の強度はあまり向上しない。 The length L of the 3 concave slopes is twice the thickness of the veneer ~ 15
It is preferable to form it at a double angle. This is because if the length L of the slope 3 portion is made less than twice the thickness of the veneer, the strength of the joint surface will be no different from that of the joint surface obtained by the butt joint method. In addition, the length L of the 3 concave slopes is 15% of the thickness of the veneer.
If it is more than double, cutting becomes difficult and the strength of the joint surface does not improve much.
また裏面単板６に表面単板２に形成された斜面
３とほぼ平行となる凸斜面３′を形成する。 Further, a convex slope 3' that is substantially parallel to the slope 3 formed on the front veneer 2 is formed on the back veneer 6.
凸斜面３′部分長さL′は表面単板２の斜面長さ
Ｌと同じである。しかも表裏面単板２，６の間に
積層された単板４に該斜面に対して任意角度に突
合せ面５を形成し、その合板１の木口面７をＺ形
木口形状とする。 The length L' of the convex slope 3' portion is the same as the slope length L of the surface veneer 2. Moreover, an abutting surface 5 is formed at an arbitrary angle with respect to the slope of the veneer 4 laminated between the front and back veneers 2 and 6, and the end surface 7 of the plywood 1 is made into a Z-shaped end shape.
該合板１の木口面７と衝合しうるよう上下対称
に裏返した形のＺ形木口形状の木口面７を有する
合板１′とをその少くとも一方木口面に接着剤を
塗布した後、衝合接合し長尺合板を得る。合板
１，１′をＺ形木口形状としており、表裏単板
２，６の間に積層された単板４に任意角度に突合
せ面５を形成してなるため嵌合時各々の突合せ面
５の突合せによつてスカーフジヨイントのように
接合面で滑りを起すようなことはない。 A plywood 1' having a Z-shaped end surface 7 which is turned upside down symmetrically so that it can abut against the end surface 7 of the plywood 1 is coated with adhesive on at least one end surface, and then The pieces are joined together to obtain a long plywood. The plywood boards 1 and 1' have a Z-shaped end shape, and the butt surfaces 5 are formed at arbitrary angles on the veneer 4 laminated between the front and back veneers 2 and 6. Due to the butt, there is no possibility of slippage at the joint surface as with scarf joints.
さらに第３図と第４図とを比較してわかるよう
に、表裏単板２，６に形成される斜面１３と３，
３′とを同じ角度の斜面を形成しようとする場
合、その合板の木口端面７の切欠部分Ｓ，S′は本
発明によるＺ形木口形状とした場合の方が小さ
く、歩留りが向上する。 Furthermore, as can be seen by comparing FIG. 3 and FIG. 4, the slopes 13 and 3 formed on the front and back veneers 2, 6,
3', the cutout portions S and S' of the butt end surface 7 of the plywood are smaller when the Z-shaped butt end shape according to the present invention is used, and the yield is improved.
また第５図、第６図に示すようにスカーフジヨ
イントの場合のスカーフ長さと、本発明接合面７
の水平長さを（Ｌ＋L′）として等しくした場合を
説明する。 In addition, as shown in FIGS. 5 and 6, the scarf length in the case of a scarf joint and the joining surface 7 of the present invention.
The case where the horizontal lengths of are made equal (L+L') will be explained.
スカーフジヨイントの場合斜面１３と表裏単板
表面とのなす角度をθ′とする。 In the case of a scarf joint, the angle between the slope 13 and the front and back veneer surfaces is θ'.
また本発明の場合斜面３，３′と表裏単板表面
とのなす角度をθとする。 In the case of the present invention, the angle between the slopes 3, 3' and the front and back veneer surfaces is θ.
θ＜θ′
の関係がなりたち、本発明は接合面の水平長さ
（Ｌ＋L′）をスカーフジヨイントの接合面の長さ
と等しくしたと仮定すると、本発明の方が接合強
度が大きくなる。 Assuming that the relationship θ<θ' holds true and that the horizontal length (L+L') of the joint surface of the present invention is made equal to the length of the joint surface of the scarf joint, the joint strength of the present invention is greater.
最後に木口面の突合せ面５および斜面３，３′
に接着剤を塗布した後、嵌合し圧着する。その際
突合せ面５のみに接着剤を多く塗布し、嵌合する
ことで突合せ面５より斜面３，３′に押出され、
表裏面にはみだすことなく接着できる。 Finally, the butt surface 5 and slopes 3, 3' of the butt end surface
After applying adhesive, fit and press. At that time, a large amount of adhesive is applied only to the abutting surface 5, and by fitting, it is pushed out from the abutting surface 5 to the slopes 3, 3'.
It can be adhered to both the front and back surfaces without protruding.
またこのとき高周波電流を接着剤に通じて内部
加熱を起し、接着効果を向上してもよい。 Further, at this time, a high frequency current may be passed through the adhesive to cause internal heating to improve the adhesive effect.
本発明の作用効果：
接合する合板１，１′の接合部において突合
せ面５，５が衝合するため、接合面で滑りを生
ずることがない。したがつて従来のスカーフジ
ヨイントでは接合面に滑りが生じ、所要の接合
強度が得られない。Effects of the present invention: Since the abutting surfaces 5, 5 abut each other at the joint portion of the plywood boards 1, 1' to be joined, no slipping occurs on the joint surfaces. Therefore, with conventional scarf joints, slipping occurs on the joint surfaces, making it impossible to obtain the required joint strength.
また本発明では上記のように接合部に滑りが
生じないため、接着剤が接合面から溢れ出るこ
ともない。 Further, in the present invention, since no slippage occurs at the joint as described above, the adhesive does not overflow from the joint surface.
従来のスカーフジヨイントに比べ、接合面の
水平長さl′が小さくなり、切欠部分が小さくな
り歩留まりが向上する。 Compared to conventional scarf joints, the horizontal length l' of the joint surface is smaller, the notch is smaller, and the yield is improved.
本発明においては従来のスカーフジヨイント
の接合面の水平長さと同じ水平長さとした場
合、本発明の斜面３，３′と表裏単板２，６表
面となす角度が小さくなる。したがつて従来の
スカーフジヨイントに比べ接合強度が大きくな
る。 In the present invention, when the horizontal length is the same as the horizontal length of the joint surface of a conventional scarf joint, the angle between the slopes 3, 3' of the present invention and the surfaces of the front and back veneers 2, 6 becomes small. Therefore, the joint strength is greater than that of conventional scarf joints.
第１図：従来の合板のスカーフジヨイント部分
の長手方向垂直断面図。第２図：本発明合板の接
合部分の長手方向垂直断面図。第３図：従来の合
板の第１図と異なる場合の長手方向垂直断面図。
第４図：本発明合板の他の実施例の接合部分の長
手方向垂直断面図。第５図、第６図：本発明作用
説明図。
１，１′……合板、２……表面単板、３，３′…
…斜面、４……単板、５……突き合せ面、６……
裏面単板、７……木口面、Ｓ……切欠部分、１
１，１１′……従来の合板、１２……木口面、１
３……斜面、１４……段違い。
FIG. 1: A vertical cross-sectional view in the longitudinal direction of a scarf joint part of a conventional plywood. FIG. 2: A vertical cross-sectional view in the longitudinal direction of the joint portion of the plywood of the present invention. FIG. 3: A vertical cross-sectional view in the longitudinal direction of conventional plywood, which is different from FIG. 1.
FIG. 4: A vertical cross-sectional view in the longitudinal direction of the joint portion of another embodiment of the plywood of the present invention. FIGS. 5 and 6: Diagrams explaining the operation of the present invention. 1, 1'... plywood, 2... surface veneer, 3, 3'...
...Slope, 4...Single plate, 5...Butting surface, 6...
Back side veneer, 7...Butt end surface, S...notch part, 1
1, 11'... Conventional plywood, 12... End side, 1
3... Slope, 14... Different level.
Claims (1)
裏単板２，６の間に積層された単板４の繊維方向
を巾方向とした接合長尺合板において、接合され
た合板１，１′の接合木口面７，７は合板長手方
向垂直断面Ｚ型をなし、 相対する合板１，１′の表裏単板２，６には凹
凸斜面３，３′が、上下ほぼ対称に形成されると
ともに 凹凸斜面３，３′をつなぐ突き合せ面５，５が
中間積層単板４，４に形成されている、 ことを特徴とする接合長尺合板。 ２ 表裏単板２，６の繊維方向を長手方向に、表
裏単板２，６の間に積層された単板４，４の繊維
方向を巾方向とした接合長尺合板の製造方法にお
いて、 接合される合板１，１′の表裏単板２，６の繊
維方向と直角の木口面に凹凸斜面３，３′を形成
し、かつ 表裏単板２，６の間の単板４，４に前記凹凸斜
面３，３′をつなぐ突き合せ面５を切削して、そ
れぞれの合板１，１′の木口面７，７を横断面Ｚ
型となし、 この相対するＺ型木口面７，７を互いに衝合接
合した、 ことを特徴とする接合長尺合板の製造方法。 ３ 接合面７，７を接着する接着剤に高周波電流
を通じて内部加熱を発生せしめて、合板１，１′
を接着する特許請求の範囲第２項記載の接合長尺
合板の製造方法。[Scope of Claims] 1. In a bonded long plywood with the fiber direction of the front and back veneers 2, 6 as the longitudinal direction, and the fiber direction of the veneer 4 laminated between the front and back veneers 2, 6 as the width direction, The joint end surfaces 7, 7 of the joined plywood boards 1, 1' have a Z-shaped vertical section in the longitudinal direction of the plywood, and the front and back veneers 2, 6 of the opposing plywood boards 1, 1' have uneven slopes 3, 3'. A bonded long plywood board characterized in that the top and bottom are formed almost symmetrically, and the abutting surfaces 5, 5 connecting the uneven slopes 3, 3' are formed on the intermediate laminated veneers 4, 4. 2. In a method for manufacturing bonded long plywood with the fiber direction of the front and back veneers 2, 6 in the longitudinal direction and the fiber direction of the veneers 4, 4 laminated between the front and back veneers 2, 6 in the width direction, The uneven slopes 3, 3' are formed on the grain sides of the front and back veneers 2, 6 at right angles to the fiber direction of the plywood 1, 1' to be processed, and the veneers 4, 4 between the front and back veneers 2, 6 are The butt surface 5 connecting the uneven slopes 3, 3' is cut, and the end surfaces 7, 7 of each plywood 1, 1' are cut into a cross section Z.
A method for manufacturing a bonded long plywood, characterized in that the die and the die and the opposing Z-shaped end faces 7, 7 are butt-bonded to each other. 3 By passing a high-frequency current through the adhesive that bonds the joint surfaces 7, 7 and generating internal heating, the plywood 1, 1'
A method for manufacturing a bonded long plywood according to claim 2, wherein the bonded long plywood is bonded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20779A JPS5593405A (en) | 1979-01-08 | 1979-01-08 | Long plywood and its preparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20779A JPS5593405A (en) | 1979-01-08 | 1979-01-08 | Long plywood and its preparation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5593405A JPS5593405A (en) | 1980-07-15 |
| JPS6210802B2 true JPS6210802B2 (en) | 1987-03-09 |
Family
ID=11467515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20779A Granted JPS5593405A (en) | 1979-01-08 | 1979-01-08 | Long plywood and its preparation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5593405A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62165902U (en) * | 1986-04-11 | 1987-10-21 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4079057B2 (en) | 2003-09-04 | 2008-04-23 | ヤマハ株式会社 | Parts for musical instruments such as side panels for piano bodies and methods for manufacturing the same |
-
1979
- 1979-01-08 JP JP20779A patent/JPS5593405A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62165902U (en) * | 1986-04-11 | 1987-10-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5593405A (en) | 1980-07-15 |
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