JP2020160409A - Cutting device - Google Patents

Cutting device Download PDF

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JP2020160409A
JP2020160409A JP2019063006A JP2019063006A JP2020160409A JP 2020160409 A JP2020160409 A JP 2020160409A JP 2019063006 A JP2019063006 A JP 2019063006A JP 2019063006 A JP2019063006 A JP 2019063006A JP 2020160409 A JP2020160409 A JP 2020160409A
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cutting
blade
optical fiber
pof
plastic optical
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JP7244908B2 (en
Inventor
茂弘 大井
Shigehiro Oi
茂弘 大井
吉村　宏一郎
Koichiro Yoshimura
宏一郎 吉村
毅 吉崎
Takeshi Yoshizaki
毅 吉崎
靖明 大久保
Yasuaki Okubo
靖明 大久保
直英 後藤
Naohide Goto
直英 後藤
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Honda Tsushin Kogyo Co Ltd
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Honda Tsushin Kogyo Co Ltd
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Abstract

To enhance smoothness of a cut face.SOLUTION: A grip part 11 grips a plastic optical fiber (POF) between a reception part 12 and press parts 13a, 13b with a predetermined load. A cutting part 15 has a blade 16 for cutting the POF gripped by the grip part 11. The grip part 11 grips the POF with such a load that the POF can move axially. Consequently, when the POF is cut with the blade 16, the POF is pressed with a flank of a cutting edge of the blade 16 to move axially.SELECTED DRAWING: Figure 1

Description

本発明は、プラスチック光ファイバ（以下「ＰＯＦ」という。）を切断する切断装置に関する。 The present invention relates to a cutting device for cutting a plastic optical fiber (hereinafter referred to as "POF").

ＰＯＦを施工する際、ＰＯＦを現場で切断する必要がある。ＰＯＦを切断した切断面が粗いと、ＰＯＦを接続した際の挿入損失が大きくなる。切断面を平滑化するために切断面を研磨するには、手間がかかる。このため、研磨を容易にし、又は、研磨の必要をなくす切断装置が提案されている。 When constructing a POF, it is necessary to cut the POF on site. If the cut surface obtained by cutting the POF is rough, the insertion loss when the POF is connected becomes large. Polishing the cut surface to smooth it is time-consuming. Therefore, a cutting device that facilitates polishing or eliminates the need for polishing has been proposed.

特開２００２−０７１９６７号公報JP-A-2002-071967 特開２００４−１１７７９４号公報Japanese Unexamined Patent Publication No. 2004-117794 特開２０１４−０８９２２３号公報Japanese Unexamined Patent Publication No. 2014-08922

近年、グレーデッドインデックス・プラスチック光ファイバ（以下「ＧＩ−ＰＯＦ」という。）など、高速かつ大容量の伝送が可能なプラスチック光ファイバが実用化されてきている。しかし、ＧＩ−ＰＯＦは、コア径が小さく、挿入損失を抑えるには、切断面に従来よりも高い平滑性が必要となる。
本発明は、切断面の平滑性を高め、研磨せずとも挿入損失を抑えることができるようにすることを目的とする。 In recent years, plastic optical fibers capable of high-speed and large-capacity transmission, such as graded index plastic optical fibers (hereinafter referred to as "GI-POF"), have been put into practical use. However, GI-POF has a small core diameter, and in order to suppress insertion loss, the cut surface needs to have higher smoothness than before.
An object of the present invention is to improve the smoothness of a cut surface so that insertion loss can be suppressed without polishing.

切断装置は、ＰＯＦを所定の荷重で把持する把持部と、前記把持部に把持された前記ＰＯＦを切断する刃を有する切断部とを備える。前記把持部は、前記ＰＯＦが軸方向に移動可能な荷重で前記ＰＯＦを把持し、これにより、前記ＰＯＦが前記刃によって切断されるとき、前記ＰＯＦが前記刃の刃先の側面に押されて軸方向に移動する。
前記把持部は、前記ＰＯＦに対して前記刃が進入する側とは反対側から前記光ファイバを支持する受け部を有してもよい。前記受け部は、前記刃の刃先が前記受け部に当らないように逃げる溝を有してもよい。前記溝の幅は、前記ＰＯＦの径以下であってもよい。
前記把持部は、更に、前記ＰＯＦに対して前記刃が進入する側に位置し、前記受け部へ向けて付勢され、これにより、前記受け部との間に前記ＰＯＦを把持する押さえ部を有してもよい。前記押さえ部と前記刃との間の隙間は、前記刃の厚さ以下であってもよい。
前記切断装置は、更に、前記ＰＯＦが前記切断部によって切断される位置に対して前記把持部とは反対側で前記ＰＯＦを把持する第二の把持部を備えてもよい。
前記切断部は、更に、前記刃が前記ＰＯＦを切断する位置の両側で前記刃を挟持して前記刃の撓みを防ぐ挟持部を有してもよい。前記挟持部が前記刃を挟持する位置の間の間隔は、前記ＰＯＦの径の５倍以上１０倍以下であってもよい。
前記刃は、厚さが、前記ＰＯＦの径の０．１倍以上５倍以下であってもよく、表面に、フッ素コーティング及び酸化防止油のうち少なくともいずれかを有してもよい。
前記切断部は、使用者による操作によって、前記ＰＯＦを切断する切断方向へ向けて移動してもよい。前記切断装置は、更に、前記使用者による操作により前記切断部が前記切断方向へ向けて移動するとき、前記切断部の移動速度を所定の速度以下に抑える速度制限部を備えてもよい。
前記切断装置は、更に、前記切断部が所定の荷重で前記ＰＯＦを切断するよう、前記ＰＯＦを切断する切断方向へ向けて前記切断部を付勢する切断付勢部を備えてもよい。前記切断部は、使用者による操作によって、前記切断方向とは反対の方向へ向けて移動してもよい。
前記把持部が前記ＰＯＦを把持する荷重は、５Ｎ以上６０Ｎ以下であってもよい。 The cutting device includes a grip portion that grips the POF with a predetermined load, and a cutting portion having a blade that cuts the POF gripped by the grip portion. The grip portion grips the POF with a load that allows the POF to move in the axial direction, whereby when the POF is cut by the blade, the POF is pushed by the side surface of the cutting edge of the blade and the shaft. Move in the direction.
The grip portion may have a receiving portion that supports the optical fiber from a side opposite to the side where the blade enters the POF. The receiving portion may have a groove through which the cutting edge of the blade escapes so as not to hit the receiving portion. The width of the groove may be equal to or less than the diameter of the POF.
The grip portion is further located on the side where the blade enters the POF and is urged toward the receiving portion, whereby the holding portion that grips the POF is held between the grip portion and the receiving portion. You may have. The gap between the holding portion and the blade may be less than or equal to the thickness of the blade.
The cutting device may further include a second grip portion that grips the POF on the side opposite to the grip portion with respect to the position where the POF is cut by the cutting portion.
The cutting portion may further have a holding portion that holds the blade on both sides of the position where the blade cuts the POF to prevent the blade from bending. The distance between the positions where the holding portion holds the blade may be 5 times or more and 10 times or less the diameter of the POF.
The blade may have a thickness of 0.1 times or more and 5 times or less the diameter of the POF, and may have at least one of a fluorine coating and an antioxidant oil on the surface.
The cutting portion may be moved in the cutting direction in which the POF is cut by an operation by the user. The cutting device may further include a speed limiting unit that suppresses the moving speed of the cutting portion to a predetermined speed or less when the cutting portion moves in the cutting direction by an operation by the user.
The cutting device may further include a cutting urging portion that urges the cutting portion in a cutting direction for cutting the POF so that the cutting portion cuts the POF with a predetermined load. The cutting portion may be moved in a direction opposite to the cutting direction by an operation by the user.
The load at which the gripping portion grips the POF may be 5N or more and 60N or less.

前記ＰＯＦが前記刃によって切断されるとき、前記ＰＯＦが前記刃の刃先の側面に押されて軸方向に移動するので、前記刃の表面の傷や凹凸が前記ＰＯＦの切断面に転写されるのを防ぐことができ、前記切断面の平滑性が向上する。
前記刃の刃先が前記受け部に当らないように逃げる溝の幅が、前記ＰＯＦの径以下であれば、前記刃が前記ＰＯＦに当接したとき、前記ＰＯＦが撓むのを防ぐことができ、前記切断面の平滑性が向上する。
前記押さえ部と前記刃との間の隙間が前記刃の厚さ以下であれば、前記ＰＯＦが前記刃によって切断される位置のすぐ近くで前記ＰＯＦを把持できるので、前記切断面の平滑性が向上する。
前記ＰＯＦが前記切断部によって切断される位置の両側で前記ＰＯＦを把持すれば、前記ＰＯＦを安定して把持することができ、前記切断面の平滑性が向上する。
前記挟持部が前記刃を挟持する位置の間の間隔が前記ＰＯＦの径の５倍以上１０倍以下であれば、前記刃の撓みを防ぐことができるので、前記切断面の平滑性が向上する。
前記刃の表面に、フッ素コーティング及び酸化防止油のうち少なくともいずれかを有していれば、前記刃の表面の凹凸が減るので、前記切断面の平滑性が向上する。
前記速度制限部が前記切断部の移動速度を所定の速度以下に抑えれば、前記刃が前記ＰＯＦに当接したとき、前記ＰＯＦが潰れたり撓んだりするのを防ぐことができ、前記切断面の平滑性が向上する。
前記切断付勢部が前記ＰＯＦを切断する切断方向へ向けて前記切断部を付勢すれば、切断速度や切断荷重を一定にすることができ、前記切断面の平滑性が向上する。
前記把持部が前記ＰＯＦを把持する荷重が５Ｎ以上６０Ｎ以下であれば、上述した条件を満足することができるので、前記切断面の平滑性が向上する。 When the POF is cut by the blade, the POF is pushed by the side surface of the cutting edge of the blade and moves in the axial direction, so that scratches and irregularities on the surface of the blade are transferred to the cut surface of the POF. Can be prevented, and the smoothness of the cut surface is improved.
If the width of the groove through which the cutting edge of the blade escapes so as not to hit the receiving portion is equal to or less than the diameter of the POF, it is possible to prevent the POF from bending when the blade comes into contact with the POF. , The smoothness of the cut surface is improved.
When the gap between the pressing portion and the blade is equal to or less than the thickness of the blade, the POF can be gripped in the immediate vicinity of the position where the POF is cut by the blade, so that the smoothness of the cut surface is improved. improves.
If the POF is gripped on both sides of the position where the POF is cut by the cutting portion, the POF can be stably gripped and the smoothness of the cut surface is improved.
When the distance between the positions where the holding portion holds the blade is 5 times or more and 10 times or less the diameter of the POF, the blade can be prevented from bending, so that the smoothness of the cut surface is improved. ..
If the surface of the blade has at least one of a fluorine coating and an antioxidant oil, the unevenness of the surface of the blade is reduced, so that the smoothness of the cut surface is improved.
If the speed limiting portion suppresses the moving speed of the cutting portion to a predetermined speed or less, it is possible to prevent the POF from being crushed or bent when the blade comes into contact with the POF, and the cutting can be prevented. The smoothness of the surface is improved.
If the cutting urging portion urges the cutting portion in the cutting direction for cutting the POF, the cutting speed and the cutting load can be made constant, and the smoothness of the cut surface is improved.
When the load for gripping the POF by the gripping portion is 5N or more and 60N or less, the above-mentioned conditions can be satisfied, so that the smoothness of the cut surface is improved.

切断装置の一例を示す平面図、正面図、側面図、Ａ−Ａ断面図及びＢ−Ｂ断面図。A plan view, a front view, a side view, an AA sectional view, and a BB sectional view showing an example of a cutting device. 刃及び挟持部の一例を示す平面図、正面図及び底面図。A plan view, a front view, and a bottom view showing an example of a blade and a holding portion. 押さえ部の一例を示す平面図、正面図、側面図、背面図、底面図及びＣ−Ｃ断面図。A plan view, a front view, a side view, a rear view, a bottom view, and a CC sectional view showing an example of the holding portion. 受け部の一例を示す平面図、正面図、側面図、Ｄ−Ｄ断面図及びＥ−Ｅ断面図。A plan view, a front view, a side view, a DD sectional view, and an EE sectional view showing an example of the receiving portion. 前記切断装置を示す正面図、側面図、Ｆ−Ｆ断面図及びＧ−Ｇ断面図。A front view, a side view, an FF sectional view, and a GG sectional view showing the cutting device. 前記切断装置が光ファイバを切断する様子を示す拡大断面図。An enlarged cross-sectional view showing how the cutting device cuts an optical fiber. 把持力と挿入損失との関係を示すグラフ。The graph which shows the relationship between the gripping force and the insertion loss. 切断面の顕微鏡写真。A photomicrograph of the cut surface. 把持力と挿入損失との関係を示すグラフ。The graph which shows the relationship between the gripping force and the insertion loss. 切断面の顕微鏡写真。A photomicrograph of the cut surface. 切断面の顕微鏡写真。A photomicrograph of the cut surface. 切断面の顕微鏡写真。A photomicrograph of the cut surface.

図１に示す切断装置１０は、ＧＩ−ＰＯＦなどのＰＯＦを切断するために使用される。前記切断装置１０は、例えば、把持部１１と、切断部１５と、ダンパ１９ａ〜１９ｄとを備える。 The cutting device 10 shown in FIG. 1 is used to cut a POF such as a GI-POF. The cutting device 10 includes, for example, a grip portion 11, a cutting portion 15, and dampers 19a to 19d.

前記把持部１１は、前記ＰＯＦを所定の荷重で把持する。前記把持部１１は、例えば、受け部１２と、二つの押さえ部１３ａ，１３ｂと、四つの付勢部１４ａ〜１４ｄとを有する。前記受け部１２は、前記ＰＯＦがその上に載置され、前記ＰＯＦを下から支持する。前記押さえ部１３ａ，１３ｂは、前記受け部１２の上に載置された前記ＰＯＦを上から押さえる。前記付勢部１４ａ〜１４ｄは、例えば圧縮コイルばねであり、前記押さえ部１３ａ，１３ｂを下へ向けて付勢する。これにより、前記ＰＯＦは、前記受け部１２と、前記押さえ部１３ａ，１３ｂとの間に、所定の荷重で把持される。 The grip portion 11 grips the POF with a predetermined load. The grip portion 11 has, for example, a receiving portion 12, two pressing portions 13a and 13b, and four urging portions 14a to 14d. In the receiving portion 12, the POF is placed on the receiving portion 12, and the POF is supported from below. The pressing portions 13a and 13b press the POF placed on the receiving portion 12 from above. The urging portions 14a to 14d are, for example, compression coil springs, and urge the pressing portions 13a and 13b downward. As a result, the POF is gripped between the receiving portion 12 and the pressing portions 13a and 13b with a predetermined load.

前記切断部１５は、前記把持部１１に把持された前記ＰＯＦを切断する。前記切断部１５は、例えば、刃１６と、二つの挟持部１７，１８とを有する。前記刃１６は、例えばステンレス製であり、前記ＰＯＦを切断する。前記挟持部１７，１８は、前記刃１６を挟持する。
前記切断部１５は、前記把持部１１に対して上下方向へ向けて移動可能である。使用者が前記切断部１５を下へ向けて押すことにより、前記切断部１５が下へ向けて移動し、前記刃１６が前記ＰＯＦを切断する。 The cutting portion 15 cuts the POF gripped by the grip portion 11. The cutting portion 15 has, for example, a blade 16 and two holding portions 17, 18. The blade 16 is made of stainless steel, for example, and cuts the POF. The sandwiching portions 17 and 18 sandwich the blade 16.
The cutting portion 15 can move in the vertical direction with respect to the grip portion 11. When the user pushes the cutting portion 15 downward, the cutting portion 15 moves downward, and the blade 16 cuts the POF.

前記ダンパ１９ａ〜１９ｄは、例えば液体式の減衰器である。前記切断装置１０を人力で操作する場合、前記切断部１５に印加される力は所定の値以下であるとみなすことができるので、前記ダンパ１９ａ〜１９ｄは、前記切断部１５の移動速度を所定の速度以下に制限する速度制限部として機能する。
前記切断部１５の移動速度が速すぎると、前記刃１６が前記ＰＯＦに当ったとき、前記ＰＯＦが押し潰されたり撓んだりして、切断面の平滑性が低くなる。
前記速度制限部が前記切断部１５の移動速度を制限することにより、切断面の平滑性を高めることができる。 The dampers 19a to 19d are, for example, liquid type attenuators. When the cutting device 10 is manually operated, it can be considered that the force applied to the cutting portion 15 is equal to or less than a predetermined value, so that the dampers 19a to 19d determine the moving speed of the cutting portion 15. It functions as a speed limiter that limits the speed below the speed limit of.
If the moving speed of the cutting portion 15 is too fast, when the blade 16 hits the POF, the POF is crushed or bent, and the smoothness of the cut surface becomes low.
By limiting the moving speed of the cut portion 15 by the speed limiting portion, the smoothness of the cut surface can be improved.

前記切断装置１０は、前記切断部１５を上へ向けて付勢する復帰付勢部を更に備えてもよい。これにより、使用者が前記切断部１５を押すのを止めたとき前記切断部１５が自動的に復帰する。前記復帰付勢部は、例えば圧縮コイルばねであり、前記ダンパ１９ａ〜１９ｄとともに、前記速度制限部として機能し得る。あるいは、前記ダンパ１９ａ〜１９ｄを設けず、その代わりとして、前記復帰付勢部だけを設け、前記速度制限部として機能させてもよい。 The cutting device 10 may further include a return urging portion that urges the cutting portion 15 upward. As a result, when the user stops pushing the cutting portion 15, the cutting portion 15 automatically returns. The return urging portion is, for example, a compression coil spring, and can function as the speed limiting portion together with the dampers 19a to 19d. Alternatively, the dampers 19a to 19d may not be provided, and instead, only the return urging portion may be provided to function as the speed limiting portion.

また、前記切断装置１０は、使用者が操作することにより前記切断部１５を下へ向けて移動させる操作部を更に備えてもよい。これにより、使用者が前記切断部１５を直接押すのではなく、使用者が前記操作部を操作することにより、前記操作部を介して前記切断部１５を移動させることができるので、操作性が向上する。
その場合、前記速度制限部は、前記切断部１５の移動速度を直接制限するのではなく、前記操作部の移動速度を制限することにより、間接的に、前記切断部１５の移動速度を制限してもよい。 Further, the cutting device 10 may further include an operating unit that moves the cutting unit 15 downward by being operated by the user. As a result, the user can move the cutting portion 15 via the operating portion by operating the operating portion instead of directly pushing the cutting portion 15, so that the operability is improved. improves.
In that case, the speed limiting unit does not directly limit the moving speed of the cutting unit 15, but indirectly limits the moving speed of the cutting unit 15 by limiting the moving speed of the operating unit. You may.

図２に示すとおり、前記刃１６は、例えば長方形板状であり、厚さがＴ６であって、下端に刃先６１が設けられている。前記刃先６１は、例えば、表側と裏側とが対称な両刃であるが、それに限らず、非対称な両刃であってもよいし、片刃であってもよい。 As shown in FIG. 2, the blade 16 is, for example, a rectangular plate shape, a thickness of T 6, the cutting edge 61 is provided at the lower end. The cutting edge 61 is, for example, a double-edged blade whose front side and back side are symmetrical, but is not limited to this, and may be an asymmetrical double-edged blade or a single-edged blade.

前記挟持部１７は、例えば、板部７２と、上縁部７３と、二つの側縁部７４ａ，７４ｂとを有する。
前記板部７２は、例えば長方形板状であり、大きさが前記刃１６とほぼ等しく、前記刃１６の後面に沿って前記刃１６を支持する。
前記上縁部７３は、例えば左右方向に長い直方体状であり、前記板部７２と一体に形成され、下面の後側が前記板部７２の上面に連結している。後面は、前記板部７２と面一である。
前記側縁部７４ａ，７４ｂは、例えば長方形板状であり、前記板部７２及び前記上縁部７３と一体に形成され、内側面の中央部分が前記板部７２及び前記上縁部７３の左右側面に連結している。上面は、前記上縁部７３と面一であり、下面は、前記板部７２と面一である。前記側縁部７４ａ，４ｂには、前記ダンパ１９ａ〜１９ｄを受けるダンパー受け部７９ａ〜７９ｄが下面から上へ向けて凹設されている。
前記板部７２は、窓７１を有する。前記窓７１は、前記板部７２の下面に連結している。 The sandwiching portion 17 has, for example, a plate portion 72, an upper edge portion 73, and two side edge portions 74a and 74b.
The plate portion 72 has, for example, a rectangular plate shape, has a size substantially equal to that of the blade 16, and supports the blade 16 along the rear surface of the blade 16.
The upper edge portion 73 has, for example, a rectangular parallelepiped shape that is long in the left-right direction, is formed integrally with the plate portion 72, and the rear side of the lower surface is connected to the upper surface of the plate portion 72. The rear surface is flush with the plate portion 72.
The side edge portions 74a and 74b have, for example, a rectangular plate shape, are formed integrally with the plate portion 72 and the upper edge portion 73, and the central portion of the inner side surface is left and right of the plate portion 72 and the upper edge portion 73. It is connected to the side. The upper surface is flush with the upper edge portion 73, and the lower surface is flush with the plate portion 72. Damper receiving portions 79a to 79d for receiving the dampers 19a to 19d are recessed in the side edge portions 74a and 4b from the lower surface to the upper side.
The plate portion 72 has a window 71. The window 71 is connected to the lower surface of the plate portion 72.

前記挟持部１８は、例えば長方形板状であり、大きさが前記刃１６とほぼ等しく、前記刃１６の前側に沿って前記刃１６を支持する。前記挟持部１８は、窓８１を有する。前記窓８１は、幅Ｗ８が前記窓７１の幅Ｗ７とほぼ等しく、前記板部７２の前記窓７１に対応する位置に設けられ、前記挟持部１８の下面に連結している。
前記挟持部１８は、ねじなどの固定部（不図示）により前記挟持部１７にしっかりと固定される。これにより、前記刃１６が前記挟持部１７，１８の間に挟まれてしっかりと保持される。
前記刃１６のうちの一部は、前記窓７１，８１を通して露出している。前記ＰＯＦは、この露出した部分によって切断される。
前記ＰＯＦを切断するとき、前記ＰＯＦからの反力を受けて前記刃１６が撓むと、前記刃１６の撓みに沿って前記ＰＯＦが切断されるので、切断面の平滑性が低くなる。
前記ＰＯＦを切断するために使用する部分を除いて、前記刃１６を前記挟持部１７，１８がしっかりと挟持しているので、前記刃１６が撓むのを防ぐことができ、切断面の平滑性を高めることができる。 The sandwiching portion 18 has, for example, a rectangular plate shape, has a size substantially equal to that of the blade 16, and supports the blade 16 along the front side of the blade 16. The sandwiching portion 18 has a window 81. The width W 8 of the window 81 is substantially equal to the width W 7 of the window 71, is provided at a position corresponding to the window 71 of the plate portion 72, and is connected to the lower surface of the holding portion 18.
The sandwiching portion 18 is firmly fixed to the sandwiching portion 17 by a fixing portion (not shown) such as a screw. As a result, the blade 16 is sandwiched between the holding portions 17 and 18 and firmly held.
A part of the blade 16 is exposed through the windows 71 and 81. The POF is cut by this exposed portion.
When the POF is cut, if the blade 16 bends due to a reaction force from the POF, the POF is cut along the bending of the blade 16, so that the smoothness of the cut surface is lowered.
Since the holding portions 17 and 18 firmly hold the blade 16 except for the portion used for cutting the POF, it is possible to prevent the blade 16 from bending and smooth the cut surface. You can improve your sex.

図３に示すとおり、前記押さえ部１３ａは、基部３１と、突出部３２とを有する。前記押さえ部１３ｂも同様である。
前記基部３１は、例えば左右方向に長い直方体状であり、左右両端の近くに貫通穴３８ａ，３８ｂを有する。前記貫通穴３８ａ，３８ｂは、例えば円柱状であり、前記基部３１を上下方向に貫通している。
前記突出部３２は、例えば前後方向に長い直方体状であり、前記基部３１と一体に形成され、上面の前側が前記基部３１の下面の中央部分に連結している。前面は、前記基部３１と面一であり、後面は、前記基部３１よりも後に出ている。前記突出部３２は、前後方向に延びる係合溝３３を下面に有する。前記係合溝３３は、例えば円柱側面状の窪みであり、前記ＰＯＦの外面に沿って前記ＰＯＦと係合する。 As shown in FIG. 3, the pressing portion 13a has a base portion 31 and a protruding portion 32. The same applies to the holding portion 13b.
The base portion 31 has, for example, a rectangular parallelepiped shape that is long in the left-right direction, and has through holes 38a and 38b near both left and right ends. The through holes 38a and 38b are, for example, cylindrical, and penetrate the base 31 in the vertical direction.
The protruding portion 32 has, for example, a rectangular parallelepiped shape that is long in the front-rear direction, is formed integrally with the base portion 31, and the front side of the upper surface is connected to the central portion of the lower surface of the base portion 31. The front surface is flush with the base portion 31, and the rear surface is projected behind the base portion 31. The protruding portion 32 has an engaging groove 33 extending in the front-rear direction on the lower surface. The engaging groove 33 is, for example, a cylindrical recess, and engages with the POF along the outer surface of the POF.

前記切断装置１０を組み立てたとき、前記押さえ部１３ａの前記突出部３２と、前記押さえ部１３ｂの前記突出部３２との間にできる隙間Ｇ３は、前記基部３１の間にできる間隔Ｄ３よりも小さい。前記基部３１の間の間隔Ｄ３は、前記刃１６を挟持した前記挟持部１７の前記板部７２及び前記挟持部１８全体の厚さＴ５（図５参照）よりも大きく、前記刃１６を挟持した前記挟持部１７の前記板部７２及び前記挟持部１８が、前記基部３１の間を通過できる。前記突出部３２の間の隙間Ｇ３は、前記刃１６の厚さＴ６より大きく、前記窓７１，８１から露出した前記刃１６が前記突出部３２の間を通過できる。前記突出部３２の幅Ｗ３は、前記窓７１，８１の幅Ｗ７，Ｗ８よりも小さい。これにより、前記板部７２や前記挟持部１８が前記突出部３２に触れることなく、前記窓７１，８１から露出した前記刃１６を前記突出部３２の間に挿入することができる。 When assembled the cutting device 10, and the projecting portion 32 of the pressing portion 13a, a gap G 3 which can be between the projecting portion 32 of the pressing section 13b than the distance D 3 defined between the base 31 Is also small. The distance D 3 between the bases 31 is larger than the thickness T 5 (see FIG. 5) of the plate portion 72 of the holding portion 17 holding the blade 16 and the holding portion 18 as a whole, and the blade 16 is held. The plate portion 72 and the sandwiching portion 18 of the sandwiched portion 17 can pass between the base portions 31. The gap G 3 between the protrusions 32 is greater than the thickness T 6 of the blade 16, the blade 16 exposed from the window 71, 81 can pass between the projecting portion 32. The width W 3 of the protrusion 32 is smaller than the widths W 7 and W 8 of the windows 71 and 81. As a result, the blade 16 exposed from the windows 71 and 81 can be inserted between the protrusions 32 without the plate portion 72 or the holding portion 18 touching the protrusions 32.

図４に示すとおり、前記受け部１２は、基部２１と、載置部２２と、四つの支持部２７ａ〜２７ｄと、四つの柱部２８ａ〜２８ｄとを有する。
前記基部２１は、例えば上下方向に面した長方形板状である。
前記支持部２７ａ〜２７ｄは、例えば直方体状であり、前記基部２１と一体に形成され、下面が前記基部２１の上面に連結している。
前記支持部２７ａ，２７ｂの間の間隔及び前記支持部２７ｃ，２７ｄの間の間隔は、前記突出部３２の幅Ｗ３よりもわずかに大きい。これにより、前記突出部３２を前記支持部２７ａ〜２７ｄの間に挿入することができる。
前記支持部２７ａ，２７ｄの間の間隔及び前記支持部２７ｂ，２７ｃの間の間隔Ｄ２は、前記刃１６を挟持した前記挟持部１７の前記板部７２及び前記挟持部１８全体の厚さＴ５よりも大きく、前記刃１６を挟持した前記挟持部１７の前記板部７２及び前記挟持部１８を前記支持部２７ａ〜２７ｄの間に挿入することができる。 As shown in FIG. 4, the receiving portion 12 has a base portion 21, a mounting portion 22, four support portions 27a to 27d, and four pillar portions 28a to 28d.
The base portion 21 has, for example, a rectangular plate shape facing in the vertical direction.
The support portions 27a to 27d have, for example, a rectangular parallelepiped shape, are formed integrally with the base portion 21, and the lower surface is connected to the upper surface of the base portion 21.
The supporting portion 27a, 27b spacing and the support portion 27c between the spacing between the 27d is slightly larger than the width W 3 of the protruding part 32. As a result, the protruding portion 32 can be inserted between the supporting portions 27a to 27d.
The supporting portion 27a, spacing and the supporting portion 27b between the 27d, the interval D 2 between the 27c, the plate portion 72 and the clamping portion 18 overall thickness T of the sandwiching portion 17 which sandwiches the blade 16 It is larger than 5, and the plate portion 72 and the sandwiching portion 18 of the sandwiching portion 17 that sandwiches the blade 16 can be inserted between the support portions 27a to 27d.

前記載置部２２は、例えば前後方向に長い直方体状であり、前記基部２１及び前記支持部２７ａ〜２７ｄと一体に形成され、下面が前記基部２１の上面の中央部分に連結し、左右側面が前記支持部２７ａ〜２７ｄの内側の側面に連結している。前記載置部２２の幅Ｗ２は、前記支持部２７ａ，２７ｂの間の間隔及び前記支持部２７ｃ，２７ｄの間の間隔と等しい。前記載置部２２と前記支持部２７ａ〜２７ｄとの間の高さの差は、前記突出部３２の高さより小さい。これにより、前記ＰＯＦを前記載置部２２と前記突出部３２とで把持することができる。
前記載置部２２は、前後方向に延びる係合溝２３と、前記係合溝２３を横切って左右方向に延びる逃げ溝２４とを、上面に有する。前記係合溝２３は、例えば円柱側面状の窪みであり、前記ＰＯＦの外面に沿って前記ＰＯＦと係合する。
前記逃げ溝２４は、前記ＰＯＦを切断したとき、前記刃１６が前記載置部２２に当らないようにするためのものである。これにより、前記刃１６の前記刃先６１が欠けたり鈍ったりするのを防ぐ。前記逃げ溝２４の断面形状は、例えば長方形状であるが、それに限らず、先細りの台形形状であってもよいし、三角形状であってもよい。前記逃げ溝２４は、前記刃１６が前記載置部２２に当らなければよく、幅Ｇ２が、前記刃１６の厚さＴ６より狭くてもよい。また、前記刃先６１を損傷しない柔軟な材料で前記逃げ溝２４を充填してもよい。 The above-mentioned placing portion 22 has, for example, a rectangular parallelepiped shape that is long in the front-rear direction, is formed integrally with the base portion 21 and the support portions 27a to 27d, a lower surface is connected to a central portion of an upper surface of the base portion 21, and left and right side surfaces are formed. It is connected to the inner side surface of the support portions 27a to 27d. The width W 2 of the above-mentioned placing portion 22 is equal to the interval between the support portions 27a and 27b and the interval between the support portions 27c and 27d. The difference in height between the above-mentioned placing portion 22 and the supporting portions 27a to 27d is smaller than the height of the protruding portion 32. As a result, the POF can be gripped by the previously described placing portion 22 and the protruding portion 32.
The above-mentioned placing portion 22 has an engaging groove 23 extending in the front-rear direction and an escape groove 24 extending in the left-right direction across the engaging groove 23 on the upper surface. The engaging groove 23 is, for example, a cylindrical recess, and engages with the POF along the outer surface of the POF.
The relief groove 24 is for preventing the blade 16 from hitting the previously described placing portion 22 when the POF is cut. This prevents the cutting edge 61 of the blade 16 from being chipped or dull. The cross-sectional shape of the relief groove 24 is, for example, rectangular, but is not limited to this, and may be a tapered trapezoidal shape or a triangular shape. The relief groove 24 may have a width G 2 narrower than the thickness T 6 of the blade 16 so that the blade 16 does not hit the previously described placing portion 22. Further, the relief groove 24 may be filled with a flexible material that does not damage the cutting edge 61.

前記柱部２８ａ〜２８ｄは、例えば円柱状であり、前記支持部２７ａ〜２７ｄの上面から上へ向けて延び、外径が前記押さえ部１３ａ，１３ｂの前記貫通穴３８ａ，３８ｂの内径よりもわずかに小さい。前記柱部２８ａ〜２８ｄは、上端に鍔部２９ａ〜２９ｄを有する。前記鍔部２９ａ〜２９ｄは、例えば円板状であり、外径が前記柱部２８ａ〜２８ｄの外径よりも大きい。
前記柱部２８ａ〜２８ｄは、前記押さえ部１３ａ，１３ｂの前記貫通穴３８ａ，３８ｂに挿通される。また、前記押さえ部１３ａ，１３ｂと前記鍔部２９ａ〜２９ｄとの間には、前記付勢部１４ａ〜１４ｄが配置される。前記押さえ部１３ａ，１３ｂ及び前記付勢部１４ａ〜１４ｄを前記支持部２７ａ〜２７ｄと前記鍔部２９ａ〜２９ｄとの間に配置するため、例えば、前記柱部２８ａ〜２８ｄを、前記支持部２７ａ〜２７ｄとは別部品で構成し、前記付勢部１４ａ〜１４ｄ及び前記押さえ部１３ａ，１３ｂに挿通したのち、前記支持部２７ａ〜２７ｄに固定する。 The pillar portions 28a to 28d are, for example, columnar, extend upward from the upper surface of the support portions 27a to 27d, and have an outer diameter slightly smaller than the inner diameter of the through holes 38a, 38b of the holding portions 13a, 13b. Is small. The pillar portions 28a to 28d have collar portions 29a to 29d at the upper ends. The collar portions 29a to 29d have, for example, a disk shape, and the outer diameter is larger than the outer diameter of the pillar portions 28a to 28d.
The pillar portions 28a to 28d are inserted into the through holes 38a and 38b of the holding portions 13a and 13b. Further, the urging portions 14a to 14d are arranged between the pressing portions 13a and 13b and the flange portions 29a to 29d. In order to dispose the pressing portions 13a and 13b and the urging portions 14a to 14d between the supporting portions 27a to 27d and the flange portions 29a to 29d, for example, the pillar portions 28a to 28d are arranged with the supporting portions 27a. It is composed of parts separate from ~ 27d, inserted into the urging portions 14a to 14d and the holding portions 13a and 13b, and then fixed to the support portions 27a to 27d.

＜切断手順＞
まず、前記押さえ部１３ａ，１３ｂを持ち上げて前記受け部１２から引き離し、前記受け部１２と前記押さえ部１３ａ，１３ｂとの間に前記ＰＯＦを挿入するための隙間を作る。この操作を容易にするため、前記切断装置１０は、前記押さえ部１３ａ，１３ｂを持ち上げる開閉機構を有してもよい。
そして、前記受け部１２と前記押さえ部１３ａ，１３ｂとの間にできた前記隙間に前記ＰＯＦを挿入する。
その後、前記押さえ部１３ａ，１３ｂを解放すると、前記押さえ部１３ａ，１３ｂが前記付勢部１４ａ〜１４ｄによって下へ向けて付勢されて移動する。前記ＰＯＦは、前記受け部１２の前記係合溝２３と前記係合溝３３との間に挟まれて把持される。 <Cut procedure>
First, the holding portions 13a and 13b are lifted and separated from the receiving portion 12, and a gap for inserting the POF is created between the receiving portion 12 and the holding portions 13a and 13b. In order to facilitate this operation, the cutting device 10 may have an opening / closing mechanism for lifting the holding portions 13a and 13b.
Then, the POF is inserted into the gap formed between the receiving portion 12 and the pressing portions 13a and 13b.
After that, when the pressing portions 13a and 13b are released, the pressing portions 13a and 13b are urged downward by the urging portions 14a to 14d and move. The POF is sandwiched and gripped between the engaging groove 23 of the receiving portion 12 and the engaging groove 33.

次に、図５に示すように、前記切断部１５を押し下げて、前記把持部１１に把持された前記ＰＯＦ８０を切断する。
前記切断部１５は、前記ダンパ１９ａ〜１９ｄによって速度が制限され、所定の速度以下で降下し、前記刃１６の前記刃先６１が前記ＰＯＦ８０に当る。前記刃１６が前記ＰＯＦ８０から受ける反力により、前記切断部１５の降下速度が更に小さくなり、それにしたがって、前記ダンパ１９ａ〜１９ｄが発揮する抵抗力が小さくなる。したがって、使用者が前記切断部１５を押し下げる力を強めなくても、前記ダンパ１９ａ〜１９ｄによる抵抗力が減少した分の力が、前記刃１６から前記ＰＯＦ８０に印加され、前記ＰＯＦ８０が切断される。 Next, as shown in FIG. 5, the cutting portion 15 is pushed down to cut the POF 80 gripped by the grip portion 11.
The speed of the cutting portion 15 is limited by the dampers 19a to 19d, and the cutting portion 15 descends at a predetermined speed or less, and the cutting edge 61 of the blade 16 hits the POF80. Due to the reaction force that the blade 16 receives from the POF 80, the descending speed of the cutting portion 15 is further reduced, and accordingly, the resistance force exerted by the dampers 19a to 19d is reduced. Therefore, even if the user does not increase the force for pushing down the cutting portion 15, the force for which the resistance force due to the dampers 19a to 19d is reduced is applied from the blade 16 to the POF80, and the POF80 is cut. ..

ここで、前記把持部１１が前記ＰＯＦ８０を把持する力が弱すぎると、前記刃先６１が前記ＰＯＦ８０に当ったとき、前記ＰＯＦ８０が撓んで、切断面の平滑性が低くなる。このため、前記刃先６１が前記ＰＯＦ８０を切断するとき前記ＰＯＦ８０に加わる力では前記ＰＯＦ８０が動かない程度に強い力で前記ＰＯＦ８０を把持する必要がある。
しかし、前記把持部１１が前記ＰＯＦ８０を把持する力が強すぎると、前記刃先６１が前記ＰＯＦ８０に切り込み始めても、前記ＰＯＦ８０が動かないので、前記刃先６１の傾斜した側面が前記ＰＯＦ８０の切断面に押し付けられる。このとき、前記刃先６１の側面に傷や凹凸があると、それが前記ＰＯＦ８０の切断面に転写されて、切断面の平滑性が損なわれる。このため、前記ＰＯＦ８０の切断が開始したのち、図６に示すように、切断された前記ＰＯＦ８０が前記刃先６１の側面に押されて動く程度に弱い力で前記ＰＯＦ８０を把持する必要がある。
例えば、４Ｎ〜４．５Ｎ程度の力で、前記把持部１１に把持された前記ＰＯＦ８０を引っ張ったとき、前記ＰＯＦ８０を前記把持部１１から引き抜くことができる程度に把持力を抑えることが好ましい。前記ＰＯＦ８０を引っ張っても、前記ＰＯＦ８０が伸びるだけで引き抜くことができないほど強く把持するのは好ましくない。 Here, if the force of the gripping portion 11 to grip the POF 80 is too weak, when the cutting edge 61 hits the POF 80, the POF 80 bends and the smoothness of the cut surface becomes low. Therefore, when the cutting edge 61 cuts the POF80, it is necessary to grip the POF80 with such a strong force that the POF80 does not move due to the force applied to the POF80.
However, if the gripping portion 11 grips the POF 80 too strongly, the POF 80 does not move even if the cutting edge 61 starts cutting into the POF 80, so that the inclined side surface of the cutting edge 61 becomes the cutting surface of the POF 80. Be pressed. At this time, if the side surface of the cutting edge 61 has scratches or irregularities, it is transferred to the cut surface of the POF 80, and the smoothness of the cut surface is impaired. Therefore, after the cutting of the POF80 is started, as shown in FIG. 6, it is necessary to grip the POF80 with a force weak enough to move the cut POF80 by being pushed by the side surface of the cutting edge 61.
For example, when the POF80 gripped by the grip portion 11 is pulled with a force of about 4N to 4.5N, it is preferable to suppress the gripping force to such an extent that the POF80 can be pulled out from the grip portion 11. Even if the POF80 is pulled, it is not preferable to grip the POF80 so strongly that it is only stretched and cannot be pulled out.

前記逃げ溝２４の幅Ｇ２は、前記幅Ｇ２が前記ＰＯＦ８０の径以下であることが好ましい。前記幅Ｇ２が広すぎると、前記刃先６１が前記ＰＯＦ８０に当ったとき、前記ＰＯＦ８０が前記逃げ溝２４に押し込まれて撓み、切断面の平滑性が低くなる。前記幅Ｇ２は、前記刃１６の厚さＴ６より小さくてもよく、その場合は、前記切断部１５の移動を制限する制限機構を設けて、前記刃先６１が前記ＰＯＦ８０を完全に切断するが、前記刃１６が前記受け部１２に当らない位置までしか、前記切断部１５が降りてこられないようにすることが好ましい。 The width G 2 of the relief groove 24 is preferably such that the width G 2 is equal to or smaller than the diameter of the POF 80. If the width G 2 is too wide, when the cutting edge 61 hits the POF 80, the POF 80 is pushed into the relief groove 24 and bends, resulting in low smoothness of the cut surface. The width G 2 may be smaller than the thickness T 6 of the blade 16, in which case the cutting edge 61 completely cuts the POF 80 by providing a limiting mechanism for limiting the movement of the cutting portion 15. However, it is preferable that the cutting portion 15 comes down only to a position where the blade 16 does not hit the receiving portion 12.

前記ＰＯＦ８０が切断される位置のなるべく近くで前記ＰＯＦ８０を把持するため、前記押さえ部１３ａ，１３ｂの間の隙間Ｇ３も、小さいほうが好ましい。具体的には、前記刃１６の厚さＴ６の３倍以下であることが望ましい。すなわち、前記押さえ部１３ａ，１３ｂと前記刃１６との間の間の隙間が、前記刃１６の厚さＴ６以下であることが望ましい。 For gripping the POF80 in as close as possible to a position where the POF80 is cut, the gap G 3 between the pressing portions 13a, 13b also the smaller is preferred. Specifically, it is preferably not more than 3 times the thickness T 6 of the blade 16. That is, it is desirable that the gap between the pressing portions 13a and 13b and the blade 16 is not more than the thickness T 6 of the blade 16.

前記刃１６の厚さＴ６は、前記ＰＯＦ８０の径の１０分の１以上５倍以下であることが好ましい。前記刃１６が薄すぎると、前記刃１６が撓みやすくなり、切断面の平滑性が損なわれる。逆に、前記刃１６が厚すぎると、前記ＰＯＦ８０を切断するときに前記ＰＯＦ８０が前記刃１６に押されて移動する移動量が大きくなるので、切断面の平滑性が損なわれやすくなる。 The thickness T 6 of the blade 16 is preferably 1/10 or more and 5 times or less the diameter of the POF 80. If the blade 16 is too thin, the blade 16 tends to bend, and the smoothness of the cut surface is impaired. On the contrary, if the blade 16 is too thick, the amount of movement of the POF 80 pushed by the blade 16 when cutting the POF 80 increases, so that the smoothness of the cut surface is likely to be impaired.

上述したように、前記刃１６の表面に傷や凹凸があると、それが前記ＰＯＦ８０の切断面に転写される場合があるので、前記刃１６の表面は、なるべく平坦であることが好ましい。そのため、例えば、前記刃１６の表面にフッ素コーティングを施したり、酸化防止油を塗布したりするなどの表面平滑化処理をすることが望ましい。 As described above, if the surface of the blade 16 has scratches or irregularities, it may be transferred to the cut surface of the POF 80. Therefore, the surface of the blade 16 is preferably as flat as possible. Therefore, for example, it is desirable to perform a surface smoothing treatment such as applying a fluorine coating to the surface of the blade 16 or applying an antioxidant oil.

また、前記窓７１，８１の幅Ｗ７，Ｗ８は、前記ＰＯＦ８０の径の５倍以上１０倍以下であることが好ましい。前記窓７１，８１が広すぎると、前記刃１６が撓みやすくなり、切断面の平滑性が損なわれる。逆に、前記窓７１，８１が狭すぎると、それに伴って、前記載置部２２及び突出部３２の幅Ｗ２，Ｗ３が狭くなり、前記ＰＯＦ８０を把持する力が弱くなる。 Further, the widths W 7 and W 8 of the windows 71 and 81 are preferably 5 times or more and 10 times or less the diameter of the POF 80. If the windows 71 and 81 are too wide, the blade 16 tends to bend, and the smoothness of the cut surface is impaired. Conversely, when the window 71, 81 is too narrow, and accordingly, the width W 2 of the mounting section 22 and the protrusion 32, W 3 becomes narrower, the force for gripping the POF80 is weakened.

＜実施例＞
以下の条件で実験をした。
（１）前記ＰＯＦ８０として、径が０．４９ｍｍ，０．７５ｍｍの２種類を用意した。
（２）前記刃１６として、表面にフッ素コーティングを施したものと施していないものとの２種類、表面に防錆油（酸化防止油）を塗布したものと塗布していないものとの２種類、厚さＴ６が０．１０ｍｍ，０．１５ｍｍの２種類、計８種類を用意した。
（３）逃げ溝２４の幅Ｇ２は、刃１６の厚さＴ６が０．１０ｍｍの場合について０．１６ｍｍ，０．２５ｍｍの２種類、刃１６の厚さＴ６が０．１５ｍｍの場合について０．２１ｍｍ，０．３０ｍｍの２種類、計４種類を用意した。
（４）前記柱部２８ａ〜２８ｄを前記支持部２７ａ〜２７ｄに螺合させて固定する構成とし、前記鍔部２９ａ〜２９ｄと前記支持部２７ａ〜２７ｄとの間の距離を変えることにより、前記把持部１１が前記ＰＯＦ８０を把持する把持力を調整できるようにした。それぞれの前記押さえ部１３ａ，１３ｂによる把持力は、１ｋｇｆ（９．８Ｎ）から６ｋｇｆ（５８．８Ｎ）まで変化させた。すなわち、二つの前記押さえ部１３ａ，１３ｂによる把持力の合計は、その２倍になる。また、参考のため、前記押さえ部１３ａ，１３ｂを取り外して、前記ＰＯＦ８０を把持しない（すなわち、把持力０Ｎ）場合についても実験した。
（５）前記窓７１，８１の幅Ｗ７，Ｗ８は３．０ｍｍとし、前記ダンパ１９ａ〜１９ｄによる反力は、約２Ｎとした。
（６）前記切断装置１０で前記ＰＯＦ８０を切断したのち、切断した前記ＰＯＦ８０の切断面をつき合わせて結合し、光信号を伝送させて挿入損失を測定した。 <Example>
The experiment was conducted under the following conditions.
(1) Two types of POF80 having diameters of 0.49 mm and 0.75 mm were prepared.
(2) There are two types of blades 16, one with a fluorine coating on the surface and one without, and two types with a rust preventive oil (antioxidant oil) coated on the surface and one without coating. , Two types with a thickness T 6 of 0.10 mm and 0.15 mm, a total of eight types were prepared.
(3) The width G 2 of the relief groove 24 is 0.16 mm and 0.25 mm when the thickness T 6 of the blade 16 is 0.10 mm, and 0.15 mm when the thickness T 6 of the blade 16 is 0.15 mm. A total of 4 types were prepared, 2 types of 0.21 mm and 0.30 mm.
(4) The pillar portions 28a to 28d are screwed and fixed to the support portions 27a to 27d, and the distance between the flange portions 29a to 29d and the support portions 27a to 27d is changed. The gripping force at which the gripping portion 11 grips the POF80 can be adjusted. The gripping force of the holding portions 13a and 13b was changed from 1 kgf (9.8 N) to 6 kgf (58.8 N). That is, the total gripping force of the two pressing portions 13a and 13b is twice that. Further, for reference, an experiment was also conducted in the case where the holding portions 13a and 13b were removed and the POF80 was not gripped (that is, the gripping force was 0N).
(5) The widths W 7 and W 8 of the windows 71 and 81 were set to 3.0 mm, and the reaction force by the dampers 19a to 19d was set to about 2N.
(6) After cutting the POF80 with the cutting device 10, the cut surfaces of the cut POF80 were brought together and combined, and an optical signal was transmitted to measure the insertion loss.

図７は、前記刃１６として、表面に防錆油を塗布したものを使用した場合において、前記把持部１１による把持力（横軸［ｋｇｆ］）と、測定した挿入損失（縦軸［ｄＢ］）との関係を示すものである。この実験結果より、把持力の下限は、０ｋｇｆ（０Ｎ）と１ｋｇｆ（９．８Ｎ）との間（例えば５Ｎ）であり、上限は、６ｋｇｆ（５８．８Ｎ）以上（例えば６０Ｎ）であることがわかる。
図８に示すとおり、前記ＰＯＦ８０を１ｋｇｆで把持した場合（左）は、切断面が平滑であるのに対し、前記ＰＯＦ８０を把持しなかった場合（右）は、切断面の下のほうがえぐれたような形状になっている。これが、挿入損失増大の原因であると考えられる。 FIG. 7 shows the gripping force (horizontal axis [kgf]) by the gripping portion 11 and the measured insertion loss (vertical axis [dB]) when a blade 16 coated with rust preventive oil is used. ) Is shown. From this experimental result, the lower limit of the gripping force is between 0 kgf (0N) and 1 kgf (9.8N) (for example, 5N), and the upper limit is 6 kgf (58.8N) or more (for example, 60N). Recognize.
As shown in FIG. 8, when the POF80 was gripped at 1 kgf (left), the cut surface was smooth, whereas when the POF80 was not gripped (right), the lower part of the cut surface was scooped out. It has a shape like this. This is considered to be the cause of the increase in insertion loss.

図９は、前記刃１６として、表面に防錆油を塗布した場合（三角印）と、塗布していない場合（丸印）とを比較したものである。この実験結果より、前記刃１６に防錆油を塗布したほうが、挿入損失が小さくなることがわかる。また、前記刃１６に防錆油を塗布していない場合は、把持力が大きすぎると、挿入損失が増大する傾向が見える。
図１０に示すとおり、前記刃１６に油を塗布した場合（左）は、切断面が平滑であるのに対し、前記刃１６に油を塗布しなかった場合（右）は、切断面に多数の縦縞模様が入っている。これは、前記刃１６の表面の傷や凹凸が転写されたものであり、挿入損失増大の原因であると考えられる。
前記刃１６に防錆油を塗布した場合であっても、把持力が大きくなるにつれて、同様の縦縞模様が表れたので、把持力が大き過ぎると、同様に、挿入損失が増大すると考えられる。 FIG. 9 is a comparison of the case where the rust preventive oil is applied to the surface of the blade 16 (triangular mark) and the case where the blade 16 is not applied (circle mark). From this experimental result, it can be seen that the insertion loss is smaller when the rust preventive oil is applied to the blade 16. Further, when the rust preventive oil is not applied to the blade 16, if the gripping force is too large, the insertion loss tends to increase.
As shown in FIG. 10, when oil is applied to the blade 16 (left), the cut surface is smooth, whereas when oil is not applied to the blade 16 (right), there are many cut surfaces. There is a vertical stripe pattern of. This is a transfer of scratches and irregularities on the surface of the blade 16, and is considered to be a cause of an increase in insertion loss.
Even when the rust preventive oil is applied to the blade 16, the same vertical stripe pattern appears as the gripping force increases. Therefore, if the gripping force is too large, it is considered that the insertion loss also increases.

図１１に示すとおり、前記刃１６にフッ素コーティングを施した場合（左）は、切断面が平滑であるのに対し、前記刃１６にフッ素コーティングを施さなかった場合（右）は、切断面に縦縞模様が入っている。したがって、挿入損失を小さくするには、前記刃１６の表面に何らかの平滑化処理をすることが有効であることがわかる。 As shown in FIG. 11, when the blade 16 is coated with fluorine (left), the cut surface is smooth, whereas when the blade 16 is not coated with fluorine (right), the cut surface is covered. It has a vertical stripe pattern. Therefore, in order to reduce the insertion loss, it can be seen that it is effective to perform some kind of smoothing treatment on the surface of the blade 16.

図１２に示すとおり、前記刃１６の厚さＴ６が０．１０ｍｍである場合（左）も、０．１５ｍｍである場合（右）も、切断面は、平滑であり、大きな違いはない。 As shown in FIG. 12, the cut surface is smooth and there is no big difference between the case where the thickness T 6 of the blade 16 is 0.10 mm (left) and the case where the thickness T 6 is 0.15 mm (right).

以上のように、ＰＯＦを適切な把持力で把持して切断することにより、切断面を平滑化し、挿入損失を抑えることができる。 As described above, by gripping and cutting the POF with an appropriate gripping force, the cut surface can be smoothed and the insertion loss can be suppressed.

なお、ＰＯＦを切断する位置の両側でＰＯＦを把持するのではなく、片側だけでＰＯＦを把持してもよい。そうすれば、切断装置の構造を簡略化できるので、製造コストを抑えることができる。その場合、把持していない側では切断面の平滑性が低くなるが、ＰＯＦの長さを調整するために先端部分を切断するなどの場合は、切断した先端部分は使用しない。したがって、一回の切断でできる二つの切断面のうち一方の平滑性さえ高ければ、挿入損失を抑えることができる。 It should be noted that the POF may be gripped only on one side instead of gripping the POF on both sides of the position where the POF is cut. By doing so, the structure of the cutting device can be simplified, and the manufacturing cost can be suppressed. In that case, the smoothness of the cut surface becomes low on the non-grasping side, but when the tip portion is cut to adjust the length of the POF, the cut tip portion is not used. Therefore, the insertion loss can be suppressed as long as the smoothness of one of the two cut surfaces produced by one cutting is high.

また、使用者が切断部又は操作部を押したときにＰＯＦを切断するのではなく、使用者が切断部又は操作部を離したときにＰＯＦを切断する構成としてもよい。例えば、刃先を上側へ向け、使用者が切断部又は操作部を押し込んだとき、ＰＯＦが把持部に把持される位置よりも下になるよう、刃を配置する。前記ダンパに代えて、切断部を上へ向けて付勢する切断付勢部を設け、前記切断付勢部の付勢力により前記切断部を元の位置へ復帰させることにより、前記ＰＯＦを切断する。これにより、前記切断付勢部の付勢力によって定まる所定の速度・所定の荷重で前記ＰＯＦを切断することができるので、切断面の平滑性が向上する。前記受け部と前記押さえ部との間にＰＯＦを挿入するのを容易にするため、前記押さえ部を持ち上げる開閉機構を設けてもよく、更に、前記開閉機構によって前記押さえ部が持ち上げられている間は、押し下げられた切断部が元の位置に復帰しないようにするストッパー機構を設けてもよい。前記ストッパー機構は、前記開閉機構が前記押さえ部を解放したのち、少し遅延して前記切断部を解放してもよい。そうすれば、前記ＰＯＦが前記把持部に確実に把持された状態で切断されるので、切断面の平滑性が向上する。 Further, instead of cutting the POF when the user pushes the cutting portion or the operating portion, the POF may be cut when the user releases the cutting portion or the operating portion. For example, the blade is arranged so that when the user pushes the cutting portion or the operating portion with the cutting edge facing upward, the POF is lower than the position where the cutting portion or the operating portion is gripped. Instead of the damper, a cutting urging portion for urging the cutting portion upward is provided, and the cutting portion is returned to the original position by the urging force of the cutting urging portion to cut the POF. .. As a result, the POF can be cut at a predetermined speed and a predetermined load determined by the urging force of the cutting urging portion, so that the smoothness of the cut surface is improved. In order to facilitate inserting the POF between the receiving portion and the pressing portion, an opening / closing mechanism for lifting the pressing portion may be provided, and further, while the pressing portion is being lifted by the opening / closing mechanism. May be provided with a stopper mechanism to prevent the pushed-down cut portion from returning to its original position. The stopper mechanism may release the cut portion with a slight delay after the opening / closing mechanism releases the holding portion. By doing so, the POF is cut in a state where it is securely gripped by the grip portion, so that the smoothness of the cut surface is improved.

以上説明した実施形態は、本発明の理解を容易にするための一例である。本発明は、これに限定されるものではなく、添付の特許請求の範囲によって定義される範囲から逸脱することなく様々に修正し、変更し、追加し、又は除去したものを含む。これは、以上の説明から当業者に容易に理解することができる。 The embodiment described above is an example for facilitating the understanding of the present invention. The present invention is not limited thereto, and includes various modifications, modifications, additions, or removals without departing from the scope defined by the appended claims. This can be easily understood by those skilled in the art from the above description.

１０ 切断装置、１１ 把持部、１２ 受け部、２１，３１ 基部、２２ 載置部、２３，３３ 係合溝、２４ 逃げ溝、２７ａ〜２７ｄ 支持部、２８ａ〜２８ｄ 柱部、２９ａ〜２９ｄ 鍔部、１３ａ，１３ｂ 押さえ部、３２ 突出部、３８ａ，３８ｂ 貫通穴、１４ａ〜１４ｄ 付勢部、１５ 切断部、１６ 刃、６１ 刃先、１７，１８ 挟持部、７１，８１ 窓、７２ 板部、７３ 上縁部、７４ａ，７４ｂ 側縁部、７９ａ〜７９ｄ ダンパー受け部、１９ａ〜１９ｄ ダンパ、８０ ＰＯＦ。 10 Cutting device, 11 Grip part, 12 Receiving part, 21.31 Base part, 22 Mounting part, 23,33 Engagement groove, 24 Relief groove, 27a to 27d Support part, 28a to 28d Pillar part, 29a to 29d flange part , 13a, 13b holding part, 32 protruding part, 38a, 38b through hole, 14a to 14d urging part, 15 cutting part, 16 blades, 61 cutting edge, 17,18 holding part, 71,81 window, 72 plate part, 73 Upper edge, 74a, 74b side edge, 79a to 79d damper receiving part, 19a to 19d damper, 80 POF.

Claims (9)

プラスチック光ファイバを所定の荷重で把持する把持部と、
前記把持部に把持された前記プラスチック光ファイバを切断する刃を有する切断部と
を備え、
前記把持部は、前記プラスチック光ファイバが軸方向に移動可能な荷重で前記プラスチック光ファイバを把持し、これにより、前記プラスチック光ファイバが前記刃によって切断されるとき、前記プラスチック光ファイバが前記刃の刃先の側面に押されて軸方向に移動する、
切断装置。 A grip that grips a plastic optical fiber with a predetermined load,
The grip portion includes a cutting portion having a blade for cutting the plastic optical fiber gripped.
The grip portion grips the plastic optical fiber with a load that allows the plastic optical fiber to move in the axial direction, whereby when the plastic optical fiber is cut by the blade, the plastic optical fiber is held by the blade. Pushed by the side of the cutting edge and moves in the axial direction,
Cutting device. 請求項１の切断装置において、前記把持部は、
前記プラスチック光ファイバに対して前記刃が進入する側とは反対側から前記光ファイバを支持する受け部を有し、
前記受け部は、前記刃の刃先が前記受け部に当らないように逃げる溝を有し、
前記溝の幅は、前記プラスチック光ファイバの径以下である、
切断装置。 In the cutting device of claim 1, the grip portion is
It has a receiving portion that supports the optical fiber from the side opposite to the side where the blade enters the plastic optical fiber.
The receiving portion has a groove through which the cutting edge of the blade escapes so as not to hit the receiving portion.
The width of the groove is equal to or less than the diameter of the plastic optical fiber.
Cutting device. 請求項２の切断装置において、前記把持部は、更に、
前記プラスチック光ファイバに対して前記刃が進入する側に位置し、前記受け部へ向けて付勢され、これにより、前記受け部との間に前記プラスチック光ファイバを把持する押さえ部を有し、
前記押さえ部と前記刃との間の隙間は、前記刃の厚さ以下である、
切断装置。 In the cutting device of claim 2, the grip portion is further
It is located on the side where the blade enters the plastic optical fiber and is urged toward the receiving portion, thereby having a holding portion for gripping the plastic optical fiber between the receiving portion and the receiving portion.
The gap between the holding portion and the blade is equal to or less than the thickness of the blade.
Cutting device. 請求項１乃至３いずれかの切断装置において、更に、
前記プラスチック光ファイバが前記切断部によって切断される位置に対して前記把持部とは反対側で前記プラスチック光ファイバを把持する第二の把持部を備える、
切断装置。 In the cutting device according to any one of claims 1 to 3, further
A second grip portion that grips the plastic optical fiber on the side opposite to the grip portion with respect to the position where the plastic optical fiber is cut by the cutting portion is provided.
Cutting device. 請求項１乃至４いずれかの切断装置において、前記切断部は、更に、
前記刃が前記プラスチック光ファイバを切断する位置の両側で前記刃を挟持して前記刃の撓みを防ぐ挟持部を有し、
前記挟持部が前記刃を挟持する位置の間の間隔は、前記プラスチック光ファイバの径の５倍以上１０倍以下である、
切断装置。 In the cutting device according to any one of claims 1 to 4, the cutting portion further
It has a holding portion that holds the blade on both sides of the position where the blade cuts the plastic optical fiber to prevent the blade from bending.
The distance between the positions where the holding portion holds the blade is 5 times or more and 10 times or less the diameter of the plastic optical fiber.
Cutting device. 請求項１乃至５いずれかの切断装置において、前記刃は、
厚さが、前記プラスチック光ファイバの径の０．１倍以上５倍以下であり、
表面に、フッ素コーティング及び酸化防止油のうち少なくともいずれかを有する、
切断装置。 In the cutting device according to any one of claims 1 to 5, the blade is
The thickness is 0.1 times or more and 5 times or less the diameter of the plastic optical fiber.
Has at least one of fluorine coating and antioxidant oil on the surface.
Cutting device. 請求項１乃至６いずれかの切断装置において、
前記切断部は、使用者による操作によって、前記プラスチック光ファイバを切断する切断方向へ向けて移動し、
前記切断装置は、更に、
前記使用者による操作により前記切断部が前記切断方向へ向けて移動するとき、前記切断部の移動速度を所定の速度以下に抑える速度制限部を備える、
切断装置。 In the cutting device according to any one of claims 1 to 6.
The cutting portion is operated by the user to move in the cutting direction for cutting the plastic optical fiber.
The cutting device further
It is provided with a speed limiting unit that suppresses the moving speed of the cutting portion to a predetermined speed or less when the cutting portion moves in the cutting direction by an operation by the user.
Cutting device. 請求項１乃至６いずれかの切断装置において、更に、
前記切断部が所定の荷重で前記プラスチック光ファイバを切断するよう、前記プラスチック光ファイバを切断する切断方向へ向けて前記切断部を付勢する切断付勢部を備え、
前記切断部は、使用者による操作によって、前記切断方向とは反対の方向へ向けて移動する、
切断装置。 In the cutting device according to any one of claims 1 to 6, further
A cutting urging portion for urging the cutting portion in the cutting direction for cutting the plastic optical fiber is provided so that the cutting portion cuts the plastic optical fiber with a predetermined load.
The cutting portion moves in a direction opposite to the cutting direction by an operation by the user.
Cutting device. 請求項１乃至８いずれかの切断装置において、
前記把持部が前記プラスチック光ファイバを把持する荷重は、５Ｎ以上６０Ｎ以下である、
切断装置。 In the cutting device according to any one of claims 1 to 8.
The load at which the grip portion grips the plastic optical fiber is 5N or more and 60N or less.
Cutting device.
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JPS58111903A (en) * 1981-12-01 1983-07-04 Sumitomo Electric Ind Ltd Working device for end face of crystalline optical fiber
JP2000056140A (en) * 1998-08-05 2000-02-25 Sumitomo Electric Ind Ltd Optical fiber cutting device
JP2003039379A (en) * 2001-07-26 2003-02-13 Mitsubishi Rayon Co Ltd Optical fiber cutting means and method, and device and method for manufacturing plug-equipped optical fiber
JP2010160207A (en) * 2009-01-06 2010-07-22 Asahi Kasei E-Materials Corp Device and method of cutting plastic optical fiber cable
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