JP4374531B2 - Finger joint cutter - Google Patents

Finger joint cutter Download PDF

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JP4374531B2
JP4374531B2 JP2004097042A JP2004097042A JP4374531B2 JP 4374531 B2 JP4374531 B2 JP 4374531B2 JP 2004097042 A JP2004097042 A JP 2004097042A JP 2004097042 A JP2004097042 A JP 2004097042A JP 4374531 B2 JP4374531 B2 JP 4374531B2
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finger joint
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敦 土屋
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Kanefusa KK
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Description

この発明は、フィンガジョイントカッタに関し、更に詳細には、積層板やパーチクルボード等の端材に対しても、継ぎ手用フィンガの欠損や割れ等を生ずることなく良好に削切し得るフィンガジョイントカッタに関するものである。   The present invention relates to a finger joint cutter, and more particularly, to a finger joint cutter that can be cut well with respect to an end material such as a laminated plate or a particle board without causing a breakage or crack of a joint finger. It is.

無垢の木材からの切出しに際して生ずる端材や、小径木の間伐材を再利用する手段として、フィンガジョイント工法による集成材の製造が広く実施されている。このフィンガジョイント工法は、前記端材や間伐材を、例えば横幅５０ｍｍ、厚み２０ｍｍで任意の長さを有する矩形状板材に切断した後、図１１に示す如く、該板材１０(被加工材)の端部に山形をなす継ぎ手用フィンガ１２を、フィンガジョイントカッタ１４の各突出歯部１６によって削成し、得られた２枚の板材１０,１０の継ぎ手用フィンガ１２,１２を噛み合わせて長手方向へ圧縮することで、相互に接合された集成材とするものである。なお、夫々の継ぎ手用フィンガ１２には、予め接着剤が塗布され、集成材の接合強度を高めるようになっている。
特開平２−２８６２０２号公報 As a means of reclaiming offcuts produced when cutting from solid wood and thinned wood of small diameter trees, production of laminated lumber by the finger joint method is widely carried out. In this finger joint method, after cutting the end material and thinned material into, for example, a rectangular plate having a width of 50 mm and a thickness of 20 mm and having an arbitrary length, as shown in FIG. 11, the plate 10 (workpiece) A joint finger 12 having a chevron shape at the end is cut by the protruding teeth 16 of the finger joint cutter 14, and the joint fingers 12, 12 of the obtained two plate members 10, 10 are engaged with each other in the longitudinal direction. By compressing to a laminated material, the laminated material is joined to each other. Each joint finger 12 is preliminarily coated with an adhesive to increase the bonding strength of the laminated material.
JP-A-2-286202

前述の如く、無垢の木材からの端材や小径木の間伐材については、フィンガジョイント工法により容易に集成材とすることができ、有効に再利用し得るので高く評価し得る。しかし、多数の薄板を重ねた積層板(合板)や、木材チップを糊等で板状に固めたパーチクルボードから生ずる端材に関しては、該端材にフィンガジョイント工法を施して集成材化することは困難で、その有効な再利用は一般に図られていなかった。 As described above, the end wood from thin wood and the thinned wood of small-diameter wood can be easily laminated by the finger joint method, and can be effectively reused, so that they can be highly evaluated. However, with regard to the end material generated from a laminated board (plywood) in which a large number of thin plates are stacked and a particle board in which wood chips are hardened into a plate shape with glue or the like, it is possible to apply a finger joint method to the end material to form a laminated material It was difficult and its effective reuse was not generally attempted.

そこで、前記積層板やパーチクルボード等の端材にフィンガ加工を施すことが困難な理由を説明する。図１０は、フィンガジョイントカッタ１４の概略構造を示す斜視図であって、該カッタ１４は、半径方向に延出する２つの突出歯部１６,１６を有する単位カッタ１８を、回転軸方向に複数枚積層した組合わせからなる。この場合に複数枚の単位カッタ１８は、その突出歯部１６が同方向に重なるよう(同一位相で)積層されるのではなく、図１０に示す如く、突出歯部１６の延出方向が９０度間隔で異なるよう、交互にずらして積層されるようになっている。 Therefore, the reason why it is difficult to perform finger processing on the end material such as the laminated plate or the particle board will be described. FIG. 10 is a perspective view showing a schematic structure of the finger joint cutter 14. The cutter 14 includes a plurality of unit cutters 18 having two projecting tooth portions 16 and 16 extending in the radial direction in the rotation axis direction. It consists of a combination of stacked sheets. In this case, the plurality of unit cutters 18 are not stacked so that the protruding teeth 16 overlap in the same direction (in the same phase), but the extending direction of the protruding teeth 16 is 90 as shown in FIG. The layers are alternately shifted so as to be different at intervals.

すなわち、図１１に示す如く、各単位カッタ１８の突出歯部１６を横方向から観察すると、上から１枚目及び３枚目の実線で示す突出歯部１６と、上から２枚目及び４枚目の２点鎖線で示す突出歯部１６は、回転軸を中心として９０度位相がずれている(図１０参照)。このことは、上から１枚目及び３枚目の突出歯部１６,１６が板材１０に継ぎ手用フィンガ１２を削切している最中に、上から２枚目及び４枚目の突出歯部１６,１６は、前者に対し９０度の位相角だけ遅れて削切待機中であることを意味している。   That is, as shown in FIG. 11, when the protruding teeth 16 of each unit cutter 18 are observed from the lateral direction, the protruding teeth 16 indicated by the first and third solid lines from the top, the second and fourth from the top, and 4 The protruding tooth portion 16 indicated by the two-dot chain line on the first sheet is 90 degrees out of phase about the rotation axis (see FIG. 10). This means that while the first and third protruding teeth 16, 16 from the top are cutting the joint fingers 12 into the plate 10, the second and fourth protruding teeth from the top. The parts 16 and 16 mean that they are waiting for cutting with a phase angle of 90 degrees with respect to the former.

このように板材１０の継ぎ手用フィンガ１２は、フィンガジョイントカッタ１４の回転に伴い一挙に削切されるのではなく、該フィンガ１２をなす山形の一辺が或る単位カッタ１８の突出歯部１６により削切された後に、該山形の他辺が、９０度の位相をもって隣接する別の単位カッタ１８の突出歯部１６により削切される、というものである。換言すれば、各フィンガ１２における山形の一辺が突出歯部１６により削切されている間は、該山形の他辺となるべき部位は、別の突出歯部１６によって支持される状態に未だなっていないことになる。   In this way, the joint finger 12 of the plate member 10 is not cut at a time as the finger joint cutter 14 rotates, but one side of the chevron forming the finger 12 is formed by the protruding tooth portion 16 of the unit cutter 18. After the cutting, the other side of the chevron is cut by the protruding teeth 16 of another unit cutter 18 adjacent to each other with a phase of 90 degrees. In other words, while one side of the chevron in each finger 12 is cut away by the protruding tooth part 16, the portion that should be the other side of the chevron is still in a state of being supported by another protruding tooth part 16. Will not be.

前記の如きフィンガジョイントカッタ１４での削切状況下において、被加工材１０として前述した積層板やパーチクルボードを選定した場合、該被加工材１０に削成される継ぎ手用フィンガ１２に欠損や割れ(むしれ)を生じたり、図１１に示すフィンガ１２の頂部幅ｔ1及び底部幅ｔ2の寸法がフィンガ毎に相違して均等にならない、等の欠点が派生する。これは、前述した如く積層材やボード類は構造的に無垢の木材の端材に比べて脆く、強度分布も不均一であることに起因している。しかも図１０に関して説明した如く、回転軸方向に隣接している単位カッタ１８の突出歯部１６は、９０度の位相差を持って積層しているから、継ぎ手フィンガ１２における山部の一辺が削切されている間は、該山部となるべき他辺の側に突出歯部１６が存在していないことも、被加工材１０の脆さと相俟った原因になっている。このように削切された継ぎ手フィンガ１２に欠点があると、集成材としての所期の接合強度が得られなかったり、外観が劣ったりして、商品価値が著しく低下することになる。 When the above-described laminated board or particle board is selected as the workpiece 10 under the cutting condition of the finger joint cutter 14 as described above, the joint finger 12 cut into the workpiece 10 is broken or cracked ( 11), and the dimensions of the top width t 1 and the bottom width t 2 of the finger 12 shown in FIG. 11 are different for each finger and are not uniform. This is because, as described above, the laminates and boards are more fragile and have a non-uniform strength distribution than structurally solid wood ends. Moreover, as described with reference to FIG. 10, the protruding teeth 16 of the unit cutters 18 adjacent to each other in the rotation axis direction are laminated with a phase difference of 90 degrees, so that one side of the crest of the joint finger 12 is cut off. The fact that the protruding tooth portion 16 does not exist on the side of the other side to be the peak portion is also a cause combined with the brittleness of the workpiece 10 while being cut. If there is a defect in the joint finger 12 cut in this way, the desired joint strength as a laminated material cannot be obtained, or the appearance is inferior, and the commercial value is significantly reduced.

そこで前記の不都合を回避するには、フィンガジョイント加工に際し、軸方向に積層した複数の単位カッタ１８の突出歯部１６が被加工材１０の端部へ同時に切り込み得るよう、各突出歯部１６の位相を同一に設定することが考えられる。複数の突出歯部１６が同一位相になっていれば、材質の脆い積層板やパーチクルボードであっても、削成中の継ぎ手用フィンガ１２は、所要間隔で隣接位置する突出歯部１６,１６(同一位相)により両側から挟まれた形で支持されるため、前述した欠損等を抑制し得ると思われるからである。   Therefore, in order to avoid the inconvenience described above, at the time of finger joint processing, the protruding tooth portions 16 of the plurality of unit cutters 18 stacked in the axial direction can be simultaneously cut into the ends of the workpiece 10 so that the protruding tooth portions 16 It is conceivable to set the phase to be the same. If the plurality of projecting tooth portions 16 are in the same phase, even if the laminated plate or the particle board is fragile, the joint finger 12 being cut is adjacent to the projecting tooth portions 16, 16 ( This is because it is considered that the above-mentioned defect or the like can be suppressed because the support is supported in a form sandwiched from both sides by the same phase.

しかし実際には、各突出歯部１６が同一位相となるよう単位カッタ１８の積層関係を設定したフィンガジョイントカッタ１４を使用して、積層板やパーチクルボードにフィンガ加工を施しても、多少の改善は見られるものの、依然として削成された継ぎ手用フィンガ１２には欠損や割れを生ずることが判明した。その理由として、従来であれば１枚目の単位カッタ１８の突出歯部１６は、２枚目の単位カッタ１８を挟んで、軸方向に３枚目の単位カッタ１８の突出歯部１６に隣り合っていたのが、各対応の突出歯部１６を同一位相になるよう調整したことが考えられる。すなわち図１１において、一方の突出歯部１６の斜面と直に隣接する他方の突出歯部１６の斜面とにより形成されるシャープなＶ溝の最底部に、フィンガ加工中の切削屑が早期且つ圧縮的に堆積し、この屑堆積部分が削成される継ぎ手フィンガ１２の先端に過負荷を与えて欠損や割れを生じさせるに至るものである。   However, in practice, even if finger processing is applied to the laminated plate or particle board using the finger joint cutter 14 in which the laminated relationship of the unit cutters 18 is set so that the protruding teeth 16 are in the same phase, there is some improvement. Although seen, it was found that the joint fingers 12 that were still trimmed were broken or cracked. The reason is that, conventionally, the protruding tooth portion 16 of the first unit cutter 18 is adjacent to the protruding tooth portion 16 of the third unit cutter 18 in the axial direction across the second unit cutter 18. It is conceivable that the corresponding protruding tooth portions 16 were adjusted to have the same phase. That is, in FIG. 11, the cutting waste during finger processing is quickly and compressed at the bottom of the sharp V-groove formed by the slope of one protruding tooth portion 16 and the slope of the other protruding tooth portion 16 immediately adjacent thereto. In this case, the tip of the joint finger 12 where the scrap accumulation portion is cut is overloaded, and the chipping or cracking occurs.

前述した課題を解決し、所期の目的を達成するため本願発明は、被加工材の端部に継ぎ手用フィンガを突出歯部によって削成するようにしたフィンガジョイントカッタであって、前記フィンガジョイントカッタは、前記突出歯部を備える単位カッタを回転軸方向に積層した複数枚の組み合わせからなると共に、前記複数枚の単位カッタの突出歯部は、前記フィンガを構成する複数の溝部へ同時に切り込み得る同一位相に配置したフィンガジョイントカッタにおいて、
隣接し合う単位カッタと単位カッタとの間に間座を設けることで、隣接する一方の単位カッタの突出歯部と他方の単位カッタの突出歯部との間に構成される谷部の底部を、該底部での切削屑の詰りを抑制し得るように、０.５mm以上で前記フィンガ12の頂部幅未満の幅寸法となるよう構成したことを特徴とする。 In order to solve the above-described problems and achieve the intended object, the present invention is a finger joint cutter in which a finger for a joint is cut by a protruding tooth portion at an end portion of a workpiece , The cutter is composed of a combination of a plurality of unit cutters each including the protruding tooth portion stacked in the rotation axis direction, and the protruding tooth portions of the plurality of unit cutters can be simultaneously cut into a plurality of groove portions constituting the finger. In finger joint cutters arranged in the same phase,
By providing a spacer between the adjacent unit cutters, the bottom of the valley portion formed between the protruding tooth part of one adjacent unit cutter and the protruding tooth part of the other unit cutter is provided. In order to suppress cutting clogging at the bottom, the width is 0.5 mm or more and less than the top width of the finger 12.

同じく前述した課題を解決し、所期の目的を達成するため本願の別の発明は、被加工材の端部に継ぎ手用フィンガを突出歯部によって削成するようにしたフィンガジョイントカッタであって、前記フィンガを構成する複数の溝部へ同時に切り込み得るよう、各対応の突出歯部を同一位相に配置したフィンガジョイントカッタにおいて、
前記フィンガジョイントカッタは、前記突出歯部を備える単位カッタを回転軸方向に積層した複数枚の組み合わせからなると共に、前記複数枚の単位カッタの突出歯部は、前記フィンガの複数の溝部へ同時に切り込み得る同一位相に配置され、
隣接し合う単位カッタの少なくとも片面に所要高さの突出領域を設けることで、隣接する一方の単位カッタの突出歯部と他方の単位カッタの突出歯部との間に構成される谷部の底部を、該底部での切削屑の詰りを抑制し得るように、０.５mm以上で前記フィンガの頂部幅未満の幅寸法となるよう構成したことを特徴とする。
同じく前述した課題を解決し、所期の目的を達成するため本願の更に別の発明は、被加工材の端部に継ぎ手用フィンガを突出歯部によって削成するようにしたフィンガジョイントカッタであって、前記フィンガジョイントカッタは、前記突出歯部を備える単位カッタを回転軸方向に積層した複数枚の組み合わせからなると共に、前記フィンガを構成する複数の溝部へ時間差をもって切り込み得るよう、隣接し合う突出歯部を中心角で５度を超えない範囲で変位させた異なる位相に配置したフィンガジョイントカッタにおいて、
隣接し合う単位カッタと単位カッタとの間に間座を設けることで、隣接する一方の単位カッタの突出歯部と他方の単位カッタの突出歯部との間に構成される谷部の底部を、該底部での切削屑の詰りを抑制し得るように、０.５mm以上で前記フィンガの頂部幅未満の幅寸法となるようにしたことを特徴とする。
同じく前述した課題を解決し、所期の目的を達成するため本願のまた更に別の発明は、被加工材の端部に継ぎ手用フィンガを突出歯部によって削成するようにしたフィンガジョイントカッタであって、前記フィンガを構成する複数の溝部へ時間差をもって切り込み得るよう、隣接し合う突出歯部を中心角で５度を超えない範囲で変位させた異なる位相に配置したフィンガジョイントカッタにおいて、
前記フィンガジョイントカッタは、前記突出歯部を備える単位カッタを回転軸方向に積層した複数枚の組み合わせからなると共に、前記フィンガを構成する複数の溝部へ時間差をもって切り込み得るよう、隣接し合う突出歯部を中心角で５度を超えない範囲で変位させた異なる位相に配置され、
隣接し合う単位カッタの少なくとも片面に所要高さの突出領域を設けることで、隣接する一方の単位カッタの突出歯部と他方の単位カッタの突出歯部との間に構成される谷部の底部を、該底部での切削屑の詰りを抑制し得るように、０.５mm以上で前記フィンガの頂部幅未満の幅寸法となるようにしたことを特徴とする。

Similarly, in order to solve the above-mentioned problems and achieve the intended purpose, another invention of the present application is a finger joint cutter in which a finger for a joint is cut by a protruding tooth portion at an end portion of a workpiece. In the finger joint cutter in which the corresponding protruding tooth portions are arranged in the same phase so that the plurality of groove portions constituting the finger can be simultaneously cut,
The finger joint cutter is composed of a combination of a plurality of unit cutters each having the protruding tooth portion stacked in the rotation axis direction, and the protruding tooth portions of the plurality of unit cutters are simultaneously cut into the plurality of groove portions of the finger. Placed in the same phase
By providing a projecting region of a required height on at least one side of the adjacent unit cutters, the bottom of the valley formed between the projecting tooth part of one adjacent unit cutter and the projecting tooth part of the other unit cutter Is configured to have a width dimension of 0.5 mm or more and less than the top width of the finger so as to suppress clogging of cutting chips at the bottom.
In order to solve the above-mentioned problems and achieve the intended purpose, still another invention of the present application is a finger joint cutter in which a joint finger is cut at the end portion of a workpiece by a protruding tooth portion. The finger joint cutter is composed of a combination of a plurality of unit cutters having the protruding tooth portions stacked in the rotation axis direction, and adjacent protrusions so as to be able to cut into the plurality of grooves constituting the fingers with a time difference. In finger joint cutters arranged in different phases with the tooth part displaced by a central angle not exceeding 5 degrees,
By providing a spacer between the adjacent unit cutters, the bottom of the valley portion formed between the protruding tooth part of one adjacent unit cutter and the protruding tooth part of the other unit cutter is provided. Further, the width dimension is 0.5 mm or more and less than the top width of the finger so as to suppress clogging of cutting chips at the bottom.
In order to solve the above-mentioned problems and achieve the intended purpose, still another invention of the present application is a finger joint cutter in which a joint finger is cut by a protruding tooth portion at an end portion of a workpiece. In the finger joint cutter arranged in different phases in which the adjacent protruding teeth are displaced in a range not exceeding 5 degrees at the central angle so that the plurality of grooves constituting the finger can be cut with a time difference,
The finger joint cutter is composed of a combination of a plurality of unit cutters having the protruding tooth portions stacked in the direction of the rotation axis, and adjacent protruding tooth portions so as to cut into the plurality of groove portions constituting the fingers with a time difference. Are arranged in different phases with the central angle displaced within a range not exceeding 5 degrees,
By providing a projecting region of a required height on at least one side of the adjacent unit cutters, the bottom of the valley formed between the projecting tooth part of one adjacent unit cutter and the projecting tooth part of the other unit cutter In order to suppress clogging of cutting chips at the bottom, the width is 0.5 mm or more and less than the top width of the finger.

本発明に係るフィンガジョイントカッタによれば、多数の板材を重ねた積層材や材質の脆いパーチクルボード等の端材であっても、継ぎ手用フィンガに欠損や割れを生ずることなく良好なフィンガ加工を施すことができる。そして、集成材への再利用が困難であった端材の有効活用が図られると共に、接合強度も充分で継ぎ手の外観も良好である等、商品価値を高め得る種々の効果を奏する。   According to the finger joint cutter according to the present invention, even in the case of an end material such as a laminated material in which a large number of plate materials are stacked or a particle board that is fragile, a good finger processing is performed without causing any defects or cracks in the joint finger. be able to. In addition, effective utilization of the offcuts that have been difficult to be reused in the laminated material is achieved, and there are various effects that can increase the commercial value, such as sufficient joining strength and good appearance of the joint.

次に、本発明に係るフィンガジョイントカッタにつき、好適な実施例を挙げて、添付図面を参照しながら以下説明する。   Next, a preferred embodiment of the finger joint cutter according to the present invention will be described below with reference to the accompanying drawings.

フィンガジョイントカッタ１４には、図１０に示した如く、複数の単位カッタ１８を回転軸方向に複数枚積み重ねた所謂セパレートタイプと、図６及び図７に関して後述するように、単位カッタを複数枚重ねた状態に相当する複数の突出歯部１６及びボス部２０(回転軸の挿通部)を一体的に形成した所謂ソリッドタイプとに分類し得る。そして本発明は、基本的に何れのタイプのカッタにも応用可能である。   As shown in FIG. 10, the finger joint cutter 14 has a so-called separate type in which a plurality of unit cutters 18 are stacked in the direction of the rotation axis, and a plurality of unit cutters, as will be described later with reference to FIGS. It can be classified into a so-called solid type in which a plurality of protruding tooth portions 16 and boss portions 20 (rotating shaft insertion portions) corresponding to the above state are integrally formed. The present invention is basically applicable to any type of cutter.

(第１発明について)
本願の第１発明は、突出歯部１６が同一位相になっているフィンガジョイントカッタ１４に関し、基本的にセパレートタイプ及びソリッドタイプの何れであってもよい。図１は、実施例１に係るフィンガジョイントカッタ１４の部分正面図であり、図２は該フィンガジョイントカッタ１４の側面図である。図示例に係るカッタ１４は、セパレートタイプのものであると共に、前述した如く、被加工材１０の端部へ同時に切り込み得るよう、各対応の突出歯部１６が同一位相に配置されている。すなわち図４に示す如く、９０度の中心角で半径方向に４つの突出歯部１６を延出させた単位カッタ１８が、回転軸方向に複数枚積層されたセパレートタイプのフィンガジョイントカッタ１４であって、各対応の突出歯部１６は同一位相で回転軸方向に整列している (About the first invention)
The first invention of the present application relates to the finger joint cutter 14 in which the protruding teeth 16 are in the same phase, and may basically be either a separate type or a solid type. FIG. 1 is a partial front view of the finger joint cutter 14 according to the first embodiment, and FIG. 2 is a side view of the finger joint cutter 14. The cutter 14 according to the illustrated example is of a separate type, and as described above, the corresponding protruding tooth portions 16 are arranged in the same phase so as to be simultaneously cut into the end portion of the workpiece 10. That is, as shown in FIG. 4, a unit cutter 18 having four protruding teeth 16 extending in the radial direction at a central angle of 90 degrees is a separate type finger joint cutter 14 laminated in the rotational axis direction. Thus, the corresponding protruding teeth 16 are aligned in the rotational axis direction with the same phase.

そして同一位相で積層される夫々の単位カッタ１８の間には、図４及び図１に示すように、所要厚で所要径の間座２２が介装されるようになっている。この間座２２は基本的に平板のリング状をなし、図１から判明する如く、単位カッタ１８と間座２２を回転軸方向へ交互に積層させた際に、該間座２２を挟んで隣接し合う突出歯部１６,１６の斜面間に画成される谷部２４の底部の幅寸法を、該底部における切削屑の詰りを抑制し得るよう、０.５mm以上で前記フィンガ１２の頂部幅ｔ1未満となるように設定したものである。従って前記間座２２に要求される厚みは、０.５mm以上であって、且つフィンガ１２における頂部幅ｔ1未満ということになる。また、(ａ)図３に実線で示したように、間座２２を挟まないで単位カッタ１８を積層した際の、突出歯部１６の頂部から谷部２４の底部までの深さをｈ1とし、(ｂ)図３に破線で示した如く、間座２２を介して交互に積層した際の、突出歯部１６の頂部から該間座２２の外周までの深さをｈ2とし、更に(ｃ)図１１に示すように、フィンガ１２の長さをｍとした場合に、該間座２２に要求される直径はｈ2＞ｍの関係を満足することが必要である。 As shown in FIGS. 4 and 1, a spacer 22 having a required diameter is interposed between the unit cutters 18 stacked in the same phase. The spacer 22 basically has a flat ring shape. As can be seen from FIG. 1, when the unit cutters 18 and the spacers 22 are alternately stacked in the rotation axis direction, the spacers 22 are adjacent to each other. The width of the bottom of the trough 24 defined between the inclined surfaces of the protruding teeth 16 and 16 is 0.5 mm or more so that the clogging of cutting chips at the bottom can be suppressed. It is set to be less than 1 . Therefore, the thickness required for the spacer 22 is 0.5 mm or more and less than the top width t 1 of the finger 12. Further, (a) as shown by a solid line in FIG. 3, the depth from the top of the projecting tooth portion 16 to the bottom of the valley portion 24 when the unit cutters 18 are stacked without sandwiching the spacer 22 is defined as h 1. (B) As indicated by broken lines in FIG. 3, the depth from the top of the projecting tooth portion 16 to the outer periphery of the spacer 22 when alternately stacked via the spacer 22 is h 2, and (c) As shown in FIG. 11, when the length of the finger 12 is m, the diameter required for the spacer 22 needs to satisfy the relationship of h 2 > m.

このように、所要厚で所要径の間座２２を単位カッタ１８,１８の間に介在させることで、２つの突出歯部１６,１６の斜面間に画成されるＶ字状の谷部２４に、削切屑が詰まり難くすることができる。すなわち図３において、隣接し合う突出歯部１６の間に画成される谷部２４における底部の幅寸法を、０.５mm以上でフィンガ１２の頂部幅ｔ1未満とすることで、Ｖ字状のシャープで深い底部がなくなり、ボード類の削切に伴い発生する屑が谷部２４から容易に排出され、結果として詰まり難くなるものである。従って継ぎ手フィンガ１２の先端が、２つの突出歯部１６,１６の間の谷部２４に圧縮状態で堆積した切り屑により過度に押圧されることがなく、該フィンガ１２の欠損や割れを抑制することができる。しかも隣接し合う突出歯部１６,１６は同一位相になっているから、フィンガ加工中に継ぎ手フィンガ１２は両側から２つの突出歯部１６,１６により支持され、これも該フィンガ１２の欠損や割れの抑制に寄与する。 In this way, by inserting the spacer 22 with the required thickness and the required diameter between the unit cutters 18, 18, the V-shaped valley 24 defined between the inclined surfaces of the two protruding teeth 16, 16. In addition, it is possible to prevent clogging of cutting chips. That is, in FIG. 3, the width of the bottom of the valley 24 defined between the adjacent protruding teeth 16 is 0.5 mm or more and less than the top width t 1 of the finger 12, so This eliminates the sharp and deep bottom, and the waste generated with the cutting of the boards is easily discharged from the trough 24, resulting in difficulty in clogging. Therefore, the tip of the joint finger 12 is not excessively pressed by the chips accumulated in a compressed state in the valley portion 24 between the two protruding tooth portions 16, 16, and the finger 12 is prevented from being broken or cracked. be able to. Moreover, since the adjacent protruding teeth 16 and 16 are in the same phase, the joint finger 12 is supported by the two protruding teeth 16 and 16 from both sides during finger processing, which is also damaged or cracked in the fingers 12. Contributes to the suppression of

なお、被加工材１０の端部に削成された継ぎ手用フィンガ１２の先端は鋭利(シャープポイント)になってはおらず、図１１に示すように、平坦になるようフィンガジョイントカッタ１４の切込み深さが調節されている。従って図３に示す如く、単位カッタ１８の間に間座２２を交互に介在させるようにしても、被加工材１０に削成されるフィンガ１２の形状に変化を来すことはない。 The tip of the joint finger 12 cut at the end of the workpiece 10 is not sharp (sharp point), and the depth of cut of the finger joint cutter 14 is flattened as shown in FIG. Is adjusted. Therefore, as shown in FIG. 3, even if the spacers 22 are alternately interposed between the unit cutters 18, the shape of the fingers 12 cut into the workpiece 10 does not change.

図５は、第１発明の別の実施例を示し、セパレートタイプで且つ各突出歯部１６を同一位相に設定したフィンガジョイントカッタ１４であって、前記間座２２に代えて、単位カッタ１８の少なくとも片方の面に所要厚で所要径をなす突出領域２６を設けたものである。この突出領域２６も、隣接する一方の単位カッタ１８の突出歯部１６と、他方の単位カッタ１８の突出歯部１６との間に構成される谷部２４の底部を嵩上げするに必要な厚みと径を確保し得る寸法に設定してあればよい。また夫々の単位カッタ１８の両面に、所要厚で所要径の突出領域２６,２６を設けるようにしてもよい。   FIG. 5 shows another embodiment of the first invention, which is a separate type and a finger joint cutter 14 in which each protruding tooth portion 16 is set to the same phase, in which the unit cutter 18 is replaced with the spacer 22 instead of the spacer 22. A projecting region 26 having a required thickness and a required diameter is provided on at least one surface. The protruding region 26 also has a thickness necessary for raising the bottom of the valley portion 24 formed between the protruding tooth portion 16 of one adjacent unit cutter 18 and the protruding tooth portion 16 of the other unit cutter 18. What is necessary is just to set to the dimension which can ensure a diameter. In addition, protruding regions 26 and 26 having a required thickness and a required diameter may be provided on both sides of each unit cutter 18.

図６及び図７は、第１発明の更に別の実施例を示すもので、突出歯部１６をボス部２０に一体的に形成したソリッドタイプで、且つ各突出歯部１６を同一位相に整列させたフィンガジョイントカッタ１４である。この場合は、隣り合う２つの突出歯部１６,１６における谷部２４の底部が、該底部での切削屑の詰りを抑制し得る寸法、すなわち０.５mm以上でフィンガ１２の頂部幅ｔ1未満に設定されている。 6 and 7 show still another embodiment of the first invention, which is a solid type in which the protruding teeth 16 are formed integrally with the boss 20 and the protruding teeth 16 are aligned in the same phase. It is the finger joint cutter 14 made to do. In this case, the bottom portion of the valley portion 24 in the two adjacent protruding tooth portions 16 and 16 has a dimension capable of suppressing clogging of cutting chips at the bottom portion, that is, 0.5 mm or more and less than the top width t 1 of the finger 12. Is set to

(第２発明について)
本願の第2発明は、突出歯部１６が僅かに異なる位相になっているフィンガジョイントカッタ１４に関し、セパレートタイプ及びソリッドタイプの何れであってもよいが、製作の容易性の見地からはセパレートタイプが推奨される。。図８は、実施例に係るセパレートタイプのフィンガジョイントカッタ１４の平面図で、継ぎ手用フィンガ１２を構成する複数の溝部へ時間差をもって切り込み得るよう、各単位カッタ１８の突出歯部１６は異なる位相に設定されている。この異なる位相としては、隣接し合う突出歯部を中心角で５度を超えない範囲で変位させるのが好ましい。 (About the second invention)
The second invention of the present application relates to the finger joint cutter 14 in which the protruding teeth 16 are in slightly different phases, which may be either a separate type or a solid type, but from the standpoint of ease of manufacture, a separate type. Is recommended. . FIG. 8 is a plan view of a separate type finger joint cutter 14 according to the embodiment, and the protruding teeth 16 of each unit cutter 18 have different phases so that they can be cut into a plurality of grooves constituting the joint finger 12 with a time difference. Is set. As this different phase, it is preferable to displace adjacent protruding teeth within a range not exceeding 5 degrees in central angle.

この場合に、フィンガジョイントカッタ１４における前記谷部２４の底部も、該底部で切削が詰るのを抑制し得るよう、０.５mm以上でフィンガ１２の頂部幅ｔ1未満の幅寸法とする必要がある。その具体的な手段としては、前述した如く間座２２を各単位カッタ１８の間に１枚置きに介在させたり、突出領域２６を単位カッタ１８の片面または両面に設けることが提案される。 In this case, the bottom portion of the valley portion 24 in the finger joint cutter 14 also needs to have a width dimension of 0.5 mm or more and less than the top width t 1 of the finger 12 so as to suppress cutting clogging at the bottom portion. is there. As specific means, it is proposed that the spacers 22 are interposed between the unit cutters 18 every other as described above, and the protruding regions 26 are provided on one side or both sides of the unit cutter 18.

第１発明の好適な実施例に係るセパレートタイプのフィンガジョイントカッタの一部正面図である。It is a partial front view of a separate type finger joint cutter according to a preferred embodiment of the first invention. 図１に係るセパレートタイプのフィンガジョイントカッタの側面図である。It is a side view of the separate type finger joint cutter which concerns on FIG. セパレートタイプのフィンガジョイントカッタにおける谷部の拡大説明図である。It is expansion explanatory drawing of the trough part in a separate type finger joint cutter. 図１に係るセパレートタイプのフィンガジョイントカッタを分解状態で示す概略斜視図である。It is a schematic perspective view which shows the separate type finger joint cutter which concerns on FIG. 1 in a disassembled state. 第１発明の別実施例に係るセパレートタイプのフィンガジョイントカッタを分解状態で示す概略斜視図である。It is a schematic perspective view which shows the separate type finger joint cutter which concerns on another Example of 1st invention in a disassembled state. 第１発明の更に別の実施例に係るソリッドタイプのフィンガジョイントカッタの一部正面図である。It is a partial front view of the solid type finger joint cutter which concerns on another Example of 1st invention. 図６に示すソリッドタイプのフィンガジョイントカッタの側面図である。It is a side view of the solid type finger joint cutter shown in FIG. 第２発明の好適な実施例に係るスパイラルタイプのフィンガジョイントカッタの側面図である。It is a side view of a spiral type finger joint cutter according to a preferred embodiment of the second invention. 図８に示すスパイラルタイプのフィンガジョイントカッタを分解状態で示す概略斜視図である。It is a schematic perspective view which shows the spiral type finger joint cutter shown in FIG. 8 in an exploded state. 従来のフィンガジョイントカッタの概略構造を示す斜視図である。It is a perspective view which shows schematic structure of the conventional finger joint cutter. 従来のフィンガジョイントカッタによって、被加工材を削成している状態を示す一部正面図である。It is a partial front view which shows the state which is cutting the workpiece by the conventional finger joint cutter.

符号の説明Explanation of symbols

１０ 被加工材
１２ 継ぎ手用フィンガ
１４ フィンガジョイントカッタ
１６ 突出歯部
１８ 単位カッタ
２２ 間座
２４ 谷部
２６ 突出領域
DESCRIPTION OF SYMBOLS 10 Work material 12 Joint finger 14 Finger joint cutter 16 Projection tooth part 18 Unit cutter 22 Spacer 24 Valley part 26 Projection area

Claims (4)

被加工材(10)の端部に継ぎ手用フィンガ(12)を突出歯部(16)によって削成するようにしたフィンガジョイントカッタ(14)であって、前記フィンガジョイントカッタ(14)は、前記突出歯部(16)を備える単位カッタ(18)を回転軸方向に積層した複数枚の組み合わせからなると共に、前記複数枚の単位カッタ(18)の突出歯部(16)は、前記フィンガ(12)を構成する複数の溝部へ同時に切り込み得る同一位相に配置したフィンガジョイントカッタにおいて、
隣接し合う単位カッタ(18)と単位カッタ(18)との間に間座(22)を設けることで、隣接する一方の単位カッタ(18)の突出歯部(16)と他方の単位カッタ(18)の突出歯部(16)との間に構成される谷部(24)の底部を、該底部での切削屑の詰りを抑制し得るように、０.５mm以上で前記フィンガ(12)の頂部幅(t1)未満の幅寸法となるよう構成したことを特徴とするフィンガジョイントカッタ。 A finger joint cutter (14) in which the joint finger (12) is cut by the protruding tooth portion (16) at the end of the workpiece (10), the finger joint cutter (14) The unit cutter (18) having the projecting tooth portion (16) is composed of a combination of a plurality of sheets laminated in the rotation axis direction, and the projecting tooth portion (16) of the plurality of unit cutters (18) includes the finger (12 In the finger joint cutter arranged in the same phase that can be simultaneously cut into a plurality of grooves constituting the
By providing a spacer (22) between the adjacent unit cutter (18) and the unit cutter (18), the protruding tooth part (16) of one adjacent unit cutter (18) and the other unit cutter ( The bottom part of the valley part (24) formed between the protruding tooth part (16) of 18) is not less than 0.5 mm so that the clogging of cutting waste at the bottom part can be suppressed. A finger joint cutter characterized by having a width dimension less than the top width (t1). 被加工材(10)の端部に継ぎ手用フィンガ(12)を突出歯部(16)によって削成するようにしたフィンガジョイントカッタ(14)であって、前記フィンガ(12)を構成する複数の溝部へ同時に切り込み得るよう、各対応の突出歯部(16)を同一位相に配置したフィンガジョイントカッタにおいて、A finger joint cutter (14) in which the joint finger (12) is cut by the protruding tooth portion (16) at the end of the workpiece (10), and a plurality of members constituting the finger (12) In the finger joint cutter in which the corresponding protruding teeth (16) are arranged in the same phase so that they can be simultaneously cut into the groove,
前記フィンガジョイントカッタ(14)は、前記突出歯部(16)を備える単位カッタ(18)を回転軸方向に積層した複数枚の組み合わせからなると共に、前記複数枚の単位カッタ(18)の突出歯部(16)は、前記フィンガ(12)の複数の溝部へ同時に切り込み得る同一位相に配置され、The finger joint cutter (14) is composed of a combination of a plurality of unit cutters (18) having the protruding tooth portions (16) stacked in the rotation axis direction, and the protruding teeth of the plurality of unit cutters (18). The portion (16) is arranged in the same phase that can be simultaneously cut into the plurality of grooves of the finger (12),
隣接し合う単位カッタ(18)の少なくとも片面に所要高さの突出領域(26)を設けることで、隣接する一方の単位カッタ(18)の突出歯部(16)と他方の単位カッタ(18)の突出歯部(16)との間に構成される谷部(24)の底部を、該底部での切削屑の詰りを抑制し得るように、０.５mm以上で前記フィンガ(12)の頂部幅(t1)未満の幅寸法となるよう構成したことを特徴とするフィンガジョイントカッタ。By providing a protruding region (26) of a required height on at least one side of the adjacent unit cutters (18), the protruding tooth part (16) of one adjacent unit cutter (18) and the other unit cutter (18) The top of the finger (12) is 0.5 mm or more so that the bottom of the trough (24) formed between the projecting tooth (16) and the protruding tooth (16) can be suppressed from being clogged with cutting chips at the bottom. A finger joint cutter characterized in that the width dimension is less than the width (t1). 被加工材(10)の端部に継ぎ手用フィンガ(12)を突出歯部(16)によって削成するようにしたフィンガジョイントカッタ(14)であって、前記フィンガジョイントカッタ(14)は、前記突出歯部(16)を備える単位カッタ(18)を回転軸方向に積層した複数枚の組み合わせからなると共に、前記フィンガ(12)を構成する複数の溝部へ時間差をもって切り込み得るよう、隣接し合う突出歯部(16)を中心角で５度を超えない範囲で変位させた異なる位相に配置したフィンガジョイントカッタにおいて、A finger joint cutter (14) in which the joint finger (12) is cut by the protruding tooth portion (16) at the end of the workpiece (10), the finger joint cutter (14) It is composed of a combination of a plurality of unit cutters (18) each having a protruding tooth portion (16) laminated in the direction of the rotation axis, and adjacent protrusions so as to cut into a plurality of groove portions constituting the fingers (12) with a time difference. In finger joint cutters arranged in different phases with the tooth part (16) displaced in the range not exceeding 5 degrees in the central angle,
隣接し合う単位カッタ(18)と単位カッタ(18)との間に間座(22)を設けることで、隣接する一方の単位カッタ(18)の突出歯部(16)と他方の単位カッタ(18)の突出歯部(16)との間に構成される谷部(24)の底部を、該底部での切削屑の詰りを抑制し得るように、０.５mm以上で前記フィンガ(12)の頂部幅(t1)未満の幅寸法となるようにしたことを特徴とするフィンガジョイントカッタ。By providing a spacer (22) between the adjacent unit cutter (18) and the unit cutter (18), the protruding tooth part (16) of one adjacent unit cutter (18) and the other unit cutter ( The bottom part of the valley part (24) formed between the protruding tooth part (16) of 18) is not less than 0.5 mm so that the clogging of cutting waste at the bottom part can be suppressed. A finger joint cutter characterized by having a width dimension less than the top width (t1). 被加工材(10)の端部に継ぎ手用フィンガ(12)を突出歯部(16)によって削成するようにしたフィンガジョイントカッタ(14)であって、前記フィンガ(12)を構成する複数の溝部へ時間差をもって切り込み得るよう、隣接し合う突出歯部(16)を中心角で５度を超えない範囲で変位させた異なる位相に配置したフィンガジョイントカッタにおいて、A finger joint cutter (14) in which the joint finger (12) is cut by the protruding tooth portion (16) at the end of the workpiece (10), and a plurality of members constituting the finger (12) In finger joint cutters arranged in different phases in which adjacent protruding teeth (16) are displaced within a range not exceeding 5 degrees in central angle so that they can be cut into the groove with a time difference,
前記フィンガジョイントカッタ(14)は、前記突出歯部(16)を備える単位カッタ(18)を回転軸方向に積層した複数枚の組み合わせからなると共に、前記フィンガ(12)を構成する複数の溝部へ時間差をもって切り込み得るよう、隣接し合う突出歯部(16)を中心角で５度を超えない範囲で変位させた異なる位相に配置され、The finger joint cutter (14) is composed of a combination of a plurality of unit cutters (18) having the protruding tooth portions (16) stacked in the direction of the rotation axis, and to a plurality of groove portions constituting the fingers (12). In order to be able to cut with a time difference, adjacent protruding teeth (16) are arranged in different phases with the central angle displaced within 5 degrees,
隣接し合う単位カッタ(18)の少なくとも片面に所要高さの突出領域(26)を設けることで、隣接する一方の単位カッタ(18)の突出歯部(16)と他方の単位カッタ(18)の突出歯部(16)との間に構成される谷部(24)の底部を、該底部での切削屑の詰りを抑制し得るように、０.５mm以上で前記フィンガ(12)の頂部幅(t1)未満の幅寸法となるようにしたことを特徴とするフィンガジョイントカッタ。By providing a protruding region (26) of a required height on at least one side of the adjacent unit cutters (18), the protruding tooth part (16) of one adjacent unit cutter (18) and the other unit cutter (18) The top of the finger (12) is 0.5 mm or more so that the bottom of the trough (24) formed between the projecting tooth (16) and the protruding tooth (16) can be suppressed from being clogged with cutting chips at the bottom. A finger joint cutter characterized by having a width dimension less than the width (t1).
JP2004097042A 2004-03-29 2004-03-29 Finger joint cutter Expired - Fee Related JP4374531B2 (en)

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