JP2004025820A - Finger joint method - Google Patents

Finger joint method Download PDF

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Publication number
JP2004025820A
JP2004025820A JP2002220462A JP2002220462A JP2004025820A JP 2004025820 A JP2004025820 A JP 2004025820A JP 2002220462 A JP2002220462 A JP 2002220462A JP 2002220462 A JP2002220462 A JP 2002220462A JP 2004025820 A JP2004025820 A JP 2004025820A
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JP
Japan
Prior art keywords
finger
lamina
laminas
fingers
adhesive
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.)
Pending
Application number
JP2002220462A
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Japanese (ja)
Inventor
Katsumi Saito
斎藤 勝実
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHONAI TEKKO KK
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SHONAI TEKKO KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHONAI TEKKO KK filed Critical SHONAI TEKKO KK
Priority to JP2002220462A priority Critical patent/JP2004025820A/en
Publication of JP2004025820A publication Critical patent/JP2004025820A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a finger joint method of high productivity, even in the case of a micro finger with a shorter finger length, by which the joint part does not shift or slip off even if the joint is released from pressing and the material is moved in the state of an adhesive being uncured once after the fingers are combined one another , pressed and fixed after processing the fingers and applying the adhesive to them. <P>SOLUTION: The edge lines of a tooth-shaped finger cutter 40a and 40b have a taper θT against a rotating axis. The finger is processed by cutting in the state of keeping the finger cutter 40a and 40b inclined only by nearly the same angle θT as of the taper θT in the direction of the lamina perpendicular to the forwarding direction at the time of processing the lamina end surface. When the laminas 1 whose fingers have been processed are coupled one another after applying the adhesive, the fingers are combined by relatively moving the two laminas toward the inclined direction including the component of the thickness direction of the lamina 1 in the state of nearly keeping the parallelism of the two laminas 1. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は木材の集成材工場等で用いるフィンガジョイント方法に関するものである。
【0002】
【従来の技術】
集成材工場で長方形板状のラミナの継ぎ加工に用いられているフィンガジョイントは、フィンガ形状に合致したフィンガカッタで端面を加工したラミナ同士を接合する方法で行われている。フィンガジョイントはラミナ1の端面に加工されたフィンガ長L(図2)が長いと材料の歩留まりが悪くなることから、図3のようにフィンガ長Lが短いマイクロフィンガが一部で採用されている。
【0003】
【発明が解決しようとする課題】
マイクロフィンガは図3のようにフィンガ長Lが短いため、フィンガ加工して接着剤塗布後にフィンガ同士を組み合わせて圧締(エンドプレッシャ)しても、いわゆるくさび効果が普通のフィンガに比べて小さい。そのため接着剤が未硬化の状態で材料を移動するとジョイント部がずれたりはずれたりするという不具合が生じやすい。従って接着剤を塗布して組み合わせた後の圧締を接着剤がある程度硬化するまで維持する必要があり、生産性が上がらない等の問題がある。
【0004】
【課題を解決するための手段】
本発明は以上の点から成したものであり、ラミナをフィンガ加工して接着剤塗布後にフィンガ同士を組み合わせて圧締したら、接着材が未硬化の状態でもすぐに次工程等のための搬送が可能なフィンガジョイント方法および集成材を提供することを目的とし、その特長とするところは、ラミナの端面を歯型状に切削してラミナ同士を接合するフィンガジョイント方法において、歯型状のフィンガカッタの刃先線が回転軸に対してテーパーθTを有し、ラミナ端面の加工時、ラミナの送り方向と直角な方向にテーパーθTとほぼ同じ角度θTだけ前記フィンガカッタを傾斜させて切削してフィンガ加工し、フィンガ加工されたラミナ同士を接着剤塗布後に接合する際、2つのラミナの下面の平行をほぼ維持した状態で、斜め方向に2つのラミナを相対的に移動させてフィンガを組み合せることである。更には、ラミナ同士の接合を分離するラミナの下面に平行な方向に引張力が加わった時、相互に密着する側に作用するスカーフ面を有する形状にフィンガ加工したラミナ同士を接合するようにしたことである。
【0005】
【発明の実施の形態】
以下図面を参照して本発明の実施形態について説明する。図1は本発明のフィンガジョイント方法によって接合されたラミナのフィンガジョイント部分の図である。図4はラミナの端面をフィンガ加工するためのフィンガカッタの図である。フィンガカッター40の歯型状の刃部42は、その刃先線43が回転軸41に対して角度θTを成すようにテーパー状に構成される。
【0006】
ラミナ1の端面をフィンガ加工するには、図5のようにラミナ1の送り方向に対して直角な方向に、前記フィンガカッタ40aをテーパーθTと同じ角度傾けた状態でラミナ1を送って加工する。ラミナ1の反対側を加工するフィンガカッタ40bは前記フィンガカッタ40aとテーパーが逆のものを使用する。図5ではラミナ1の両端面を同時にフィンガ加工しているが、片側ずつ加工しても良い。
このようにしてラミナ1の端面をフィンガ加工することにより、図6のような歯型が切削される。即ち、上述のフィンガカッタ40をテーパーθTだけ傾けた状態でフィンガ加工したため、切削された歯型の1つの山の両側のスカーフ面A1,A2がラミナ1の下面2に対していずれも同一方向に傾斜するように切削される。ラミナ1の反対側の端面に切削されたスカーフ面B1,B2も同一方向に傾斜するよう切削される。
【0007】
端面にフィンガ加工されたラミナには接着剤が塗布され、組み合わされる。本発明では前述のようにフィンガ加工したため、通常のフィンガジョイントのように接合する2つのラミナ1a,1bを平行な状態でかつ定盤等の上に載置してラミナ1の下面2a,2bの高さを揃えた状態で水平方向(矢印D)に移動して組み合せようとしても、図7のEの部分が当接してしまい、組み合せることができない。そのため図8のように接合する2つのラミナ1a,1bの下面2a,2Bの平行は維持しつつも、図8矢印Fのようにラミナ1の厚み方向の成分も有する斜め方向に相対的に両ラミナ1a,1bを移動させて組み合せる。組み合せが完了したら所定の圧力で圧締する。圧締する方向はラミナ1の下面2と平行な方向でも良い。
【0008】
このようにすることで図1のようにラミナが接合される。接合してすぐには接着剤が完全には硬化していない。そのため不用意に移動するとジョイント部がずれたりはずれたりする可能性がある。しかし本発明では上述のように接合したため、両ラミナ間の高さ関係が変らないように、簡単な機構で構成される上からの押さえ等でラミナの浮き上がりを規制してやれば、ラミナ1の下面2と平行でラミナ同士の接合を分離する力(図9矢印H方向)が加わったとしても、図9に斜線部で示した両ラミナ1a,1bのスカーフ面Gが相互に密着する側に作用するため、移動中にジョイント部分がずれたりはずれたりするという現象は著しく減少する。
尚、本発明のフィンガジョイント方法は、ラミナの縦継ぎ、横継ぎに関係なく適用できるものである。また本発明はマイクロフィンガに限定されるものではない。
【0009】
【発明の効果】
本発明はフィンガジョイントの加工をラミナ同士の接合を分離するラミナの下面に平行な方向に引張力が加わった時、相互に密着する側に作用するスカーフ面を有するような形状に加工して接合するため、フィンガジョイント後、接着剤が完全に硬化するまで圧締している必要がない。従って接着剤の硬化を待たずとも圧締を解いて移動することができるため、生産性が大幅に向上する。そのため材料の歩留まりが良いマイクロフィンガが普及して資源の節約につながる等の効果を有する。
【図面の簡単な説明】
【図1】本発明のフィンガジョイント方法で接合したフィンガジョイントの説明図
【図2】従来のフィンガジョイントの説明図
【図3】従来のマイクロフィンガの説明図
【図4】本発明のフィンガカッタの説明図
【図5】ラミナのフィンガ加工の説明図
【図6】本発明のフィンガ形状の説明図
【図7】本発明のフィンガジョイントの説明図
【図8】本発明のフィンガジョイントの説明図
【図9】本発明のフィンガジョイントの説明図
【符号の説明】
1  ラミナ
40 フィンガカッタ
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a finger joint method used in a wood glued lumber factory or the like.
[0002]
[Prior art]
Finger joints used in laminating lumber factories to join rectangular plate-like lamina are performed by a method of joining laminas whose end faces are processed by a finger cutter that matches the finger shape. As for the finger joint, if the finger length L (FIG. 2) formed on the end face of the lamina 1 is long, the yield of the material is deteriorated. Therefore, as shown in FIG. 3, a micro finger having a short finger length L is partially used. .
[0003]
[Problems to be solved by the invention]
Since the micro-finger has a short finger length L as shown in FIG. 3, even if the fingers are processed and the adhesive is applied and the fingers are combined and pressed (end pressure), the so-called wedge effect is smaller than that of a normal finger. Therefore, when the material is moved in a state where the adhesive is uncured, a problem that the joint portion is shifted or separated easily occurs. Therefore, it is necessary to maintain the pressing after the adhesive is applied and combined until the adhesive is hardened to some extent, and there is a problem that productivity does not increase.
[0004]
[Means for Solving the Problems]
The present invention has been made in view of the above points, and when lamina is finger-processed and the fingers are combined with each other after application of the adhesive and pressed together, even if the adhesive is in an uncured state, it can be immediately conveyed for the next step or the like. It is an object of the present invention to provide a possible finger joint method and a laminated material, and a feature thereof is that in a finger joint method of cutting lamina end faces into a tooth shape and joining the laminas, a tooth-shaped finger cutter is provided. The edge line has a taper θT with respect to the rotation axis, and when machining the lamina end surface, the finger cutter is cut by inclining the finger cutter by an angle θT that is substantially the same as the taper θT in a direction perpendicular to the laminating direction. Then, when joining the finger-processed laminas after applying the adhesive, the two laminas are slanted in a state where the lower surfaces of the two laminas are almost maintained in parallel. Is to combine the finger is moved to-basis. Furthermore, when a tensile force is applied in a direction parallel to the lower surface of the lamina that separates the laminating joints, the finger-finished laminas are joined to a shape having a scarf surface acting on the side that is in close contact with each other. That is.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram of a finger joint portion of lamina joined by the finger joint method of the present invention. FIG. 4 is a diagram of a finger cutter for finger-processing the end face of the lamina. The tooth-shaped blade portion 42 of the finger cutter 40 is formed in a tapered shape such that the blade tip line 43 forms an angle θT with respect to the rotation shaft 41.
[0006]
In order to perform finger machining on the end face of the lamina 1, as shown in FIG. 5, the lamina 1 is sent while the finger cutter 40a is inclined at the same angle as the taper θT in a direction perpendicular to the feed direction of the lamina 1. . The finger cutter 40b for processing the opposite side of the lamina 1 has a taper opposite to that of the finger cutter 40a. In FIG. 5, both end surfaces of the lamina 1 are simultaneously finger-processed, but may be processed one by one.
By finger-fining the end face of the lamina 1 in this manner, a tooth pattern as shown in FIG. 6 is cut. That is, since the above-mentioned finger cutter 40 is finger-processed in a state of being inclined by the taper θT, the scarf surfaces A1 and A2 on both sides of one mountain of the cut tooth form are in the same direction with respect to the lower surface 2 of the lamina 1. It is cut so as to be inclined. Scarf surfaces B1 and B2 cut on the opposite end surface of lamina 1 are also cut so as to be inclined in the same direction.
[0007]
An adhesive is applied to the finger-finished lamina on the end face and assembled. In the present invention, since the fingers are machined as described above, the two laminas 1a and 1b to be joined like a normal finger joint are placed in a parallel state and on a surface plate or the like to form the lower surfaces 2a and 2b of the lamina 1. Even if the members are moved in the horizontal direction (arrow D) in a state where the heights are aligned, the portions E in FIG. 7 come into contact with each other and cannot be combined. For this reason, the lower surfaces 2a and 2B of the two laminas 1a and 1b to be joined as shown in FIG. 8 are maintained parallel to each other, but are also relatively oblique to each other in the thickness direction of the lamina 1 as indicated by an arrow F in FIG. The laminas 1a and 1b are moved and combined. When the combination is completed, it is clamped at a predetermined pressure. The pressing direction may be a direction parallel to the lower surface 2 of the lamina 1.
[0008]
By doing so, the lamina is joined as shown in FIG. Immediately after bonding, the adhesive is not completely cured. For this reason, careless movement may cause the joint to shift or slip off. However, in the present invention, since the bonding is performed as described above, if the laminar lifting is regulated by a simple holding mechanism or the like so as not to change the height relationship between the two laminas, the lower surface 2 of the lamina 1 can be controlled. Even if a force (in the direction of arrow H in FIG. 9) is applied in parallel with the lamina and the lamina 1a, the scarf surfaces G of the laminas 1a and 1b, which are indicated by hatching in FIG. Therefore, the phenomenon that the joint part shifts or separates during movement is significantly reduced.
The finger joint method according to the present invention can be applied irrespective of the vertical joint and the horizontal joint of lamina. Also, the invention is not limited to microfingers.
[0009]
【The invention's effect】
The present invention processes the joint of the finger joint into a shape that has a scarf surface that acts on the side that is in close contact with each other when tensile force is applied in the direction parallel to the lower surface of the lamina that separates the joining of the lamina Therefore, after the finger joint, it is not necessary to press the adhesive until the adhesive is completely cured. Therefore, since it is possible to move without releasing the pressure without waiting for the adhesive to harden, the productivity is greatly improved. Therefore, there is an effect that the microfinger having a good material yield is spread and leads to resource saving.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a finger joint joined by the finger joint method of the present invention. FIG. 2 is an explanatory view of a conventional finger joint. FIG. 3 is an explanatory view of a conventional micro finger. FIG. 4 is a view of a finger cutter of the present invention. FIG. 5 is an explanatory view of lamina finger processing. FIG. 6 is an explanatory view of a finger shape of the present invention. FIG. 7 is an explanatory view of a finger joint of the present invention. FIG. 8 is an explanatory view of a finger joint of the present invention. FIG. 9 is an explanatory view of a finger joint according to the present invention.
1 Lamina 40 Finger cutter

Claims (3)

ラミナの端面を歯型状に切削してラミナ同士を接合するフィンガジョイント方法において、
歯型状のフィンガカッタの刃先線が回転軸に対してテーパーθTを有し、ラミナ端面の加工時、ラミナの送り方向と直角な方向にテーパーθTとほぼ同じ角度θTだけ前記フィンガカッタを傾斜させて切削してフィンガ加工することを特徴とするフィンガジョイント方法。
In the finger joint method of joining the laminas by cutting the end faces of the lamina into a tooth shape,
The cutting edge line of the tooth-shaped finger cutter has a taper θT with respect to the rotation axis, and at the time of processing the lamina end face, the finger cutter is inclined by an angle θT substantially equal to the taper θT in a direction perpendicular to the lamina feed direction. A finger joint method characterized in that finger cutting is performed by cutting.
フィンガ加工されたラミナ同士を接着剤塗布後に接合する際、2つのラミナの下面の平行をほぼ維持した状態で、斜め方向に2つのラミナを相対的に移動させてフィンガを組み合せることを特徴とする請求項1記載のフィンガジョイント方法。When joining the finger-processed laminas after applying the adhesive, the two laminas are relatively moved in an oblique direction and the fingers are combined in a state where the lower surfaces of the two laminas are almost parallel. The finger joint method according to claim 1, wherein ラミナの端面を歯型状に切削してラミナ同士を接合するフィンガジョイント方法において、
ラミナ同士の接合を分離するラミナの下面に平行な方向に引張力が加わった時、相互に密着する側に作用するスカーフ面を有する形状にフィンガ加工したラミナ同士を接合することを特徴とするフィンガジョイント方法。
In the finger joint method of joining the laminas by cutting the end faces of the lamina into a tooth shape,
When a tensile force is applied in a direction parallel to the lower surface of the lamina that separates the bonding of the laminas, the fingers are bonded to each other in a shape having a scarf surface that acts on the side that is in intimate contact with each other. Joint method.
JP2002220462A 2002-06-25 2002-06-25 Finger joint method Pending JP2004025820A (en)

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JP2002220462A JP2004025820A (en) 2002-06-25 2002-06-25 Finger joint method

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Family Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011093128A (en) * 2009-10-28 2011-05-12 Meinan Mach Works Inc Method for forming separated scarf surface
TWI457189B (en) * 2011-04-26 2014-10-21 Meinan Machinery Works The trench forming method of the end of the plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011093128A (en) * 2009-10-28 2011-05-12 Meinan Mach Works Inc Method for forming separated scarf surface
TWI457189B (en) * 2011-04-26 2014-10-21 Meinan Machinery Works The trench forming method of the end of the plate

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