JP4568145B2 - Shock detecting optical fiber sensor, load concentrating plate and manufacturing method thereof - Google Patents

Shock detecting optical fiber sensor, load concentrating plate and manufacturing method thereof Download PDF

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JP4568145B2
JP4568145B2 JP2005063944A JP2005063944A JP4568145B2 JP 4568145 B2 JP4568145 B2 JP 4568145B2 JP 2005063944 A JP2005063944 A JP 2005063944A JP 2005063944 A JP2005063944 A JP 2005063944A JP 4568145 B2 JP4568145 B2 JP 4568145B2
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plate
optical fiber
longitudinal direction
load
holes
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JP2006250563A (en
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康之 菱田
重徳 小林
明 鈴木
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Hitachi Cable Ltd
Denso Corp
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Denso Corp
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Description

本発明は、衝撃を検知するための衝撃検知光ファイバセンサに係り、特に、衝撃を検知するための光ファイバに衝撃荷重を付与するための荷重集中板及びその製造方法に関する。   The present invention relates to an impact detection optical fiber sensor for detecting an impact, and more particularly to a load concentrating plate for applying an impact load to an optical fiber for detecting an impact and a method for manufacturing the same.

衝撃検知光ファイバセンサは、自動車等の車両に備えられ、他の車両や障害物等との衝突時の衝撃を検知（センシング）するためのものである。   The impact detection optical fiber sensor is provided in a vehicle such as an automobile and is for detecting (sensing) an impact at the time of collision with another vehicle or an obstacle.

例えば、図１０に示すように、衝撃検知光ファイバセンサ５０は、衝撃を検知するための光ファイバ５１と、光ファイバ５１の一端に接続された発光素子（図示せず）と、光ファイバ５１の他端に接続された受光素子（図示せず）と、光ファイバ５１の長手方向に沿って設けられた荷重集中板５２とを備えている。光ファイバ５１と荷重集中板５２とはモールド材５３によりモールドされて一体化されており、これら光ファイバ５１、荷重集中板５２及びモールド材５３がセンサ５０のセンサ部５４を構成している。   For example, as shown in FIG. 10, the impact detection optical fiber sensor 50 includes an optical fiber 51 for detecting an impact, a light emitting element (not shown) connected to one end of the optical fiber 51, and the optical fiber 51. A light receiving element (not shown) connected to the other end, and a load concentrating plate 52 provided along the longitudinal direction of the optical fiber 51 are provided. The optical fiber 51 and the load concentrating plate 52 are molded and integrated with a molding material 53, and the optical fiber 51, the load concentrating plate 52 and the molding material 53 constitute a sensor unit 54 of the sensor 50.

荷重集中板５２の片面（図１０（ａ）中の上側）には、光ファイバ５１に衝撃荷重を付与すべく、長手方向に所定間隔を隔てて複数の突起５５が形成されている。各突起５５の高さは全て等しく、光ファイバ５１と各突起５５とが接触するようになっている。一般的に、突起５５はＲ形状に形成される。   A plurality of protrusions 55 are formed on one side of the load concentrating plate 52 (upper side in FIG. 10A) at predetermined intervals in the longitudinal direction so as to apply an impact load to the optical fiber 51. The heights of the protrusions 55 are all equal, and the optical fiber 51 and the protrusions 55 are in contact with each other. In general, the protrusion 55 is formed in an R shape.

他の車両や障害物等との衝突によってセンサ５０のセンサ部５４に衝撃荷重が加わると、光ファイバ５１が荷重集中板５２の突起５５側に押しつけられて曲がる。そうなると、光ファイバ５１に衝撃に応じた曲げ損失が発生するので、その損失量から衝撃の有無、大きさを検知することができる。光ファイバ５１の損失量は、光ファイバ５１を伝搬する光の透過光量の変化を観測することで測定できる。   When an impact load is applied to the sensor portion 54 of the sensor 50 due to a collision with another vehicle or an obstacle, the optical fiber 51 is pressed against the projection 55 side of the load concentration plate 52 and bent. Then, a bending loss corresponding to the impact is generated in the optical fiber 51, so that the presence or absence and the magnitude of the impact can be detected from the loss amount. The amount of loss of the optical fiber 51 can be measured by observing a change in the amount of light transmitted through the optical fiber 51.

特表２００２−５３１８１２号公報JP-T-2002-531812

ところで、従来、複数の突起５５を有する荷重集中板５２を製造する場合には、突起５５を形成するのに十分な厚さを有するリボン状の板を、液中ワイヤ放電等により山形状に切削していた。   By the way, conventionally, when manufacturing the load concentration plate 52 having a plurality of projections 55, a ribbon-like plate having a thickness sufficient to form the projections 55 is cut into a mountain shape by submerged wire discharge or the like. Was.

しかしながら、液中ワイヤ放電は水槽内で行う必要があるため、その水槽の大きさに依存して製造可能な荷重集中板５２の長さが制限される（一般的には、最大長さで５０ｃｍ以下）。そこで、水槽に入れることができない長尺の荷重集中板５２を製造する際には、複数の短尺の荷重集中板５２を液中ワイヤ放電により形成し、それらを溶接等により長手方向に連結していた。これでは、複数の短尺の荷重集中板５２を連結する工程を追加する必要があり、製造コストが上昇するという問題があった。また、複数の短尺の荷重集中板５２を連結する際の荷重集中板５２同士の位置精度が低く、長尺の荷重集中板５２を寸法精度良く製造することが困難であるという問題があった。   However, since it is necessary to perform the submerged wire discharge in the water tank, the length of the load concentration plate 52 that can be manufactured is limited depending on the size of the water tank (generally, the maximum length is 50 cm). Less than). Therefore, when manufacturing a long load concentration plate 52 that cannot be put in the water tank, a plurality of short load concentration plates 52 are formed by submerged wire discharge and connected in the longitudinal direction by welding or the like. It was. In this case, it is necessary to add a step of connecting a plurality of short load concentrating plates 52, and there is a problem that the manufacturing cost increases. Further, there is a problem that the positional accuracy between the load concentration plates 52 when connecting a plurality of short load concentration plates 52 is low, and it is difficult to manufacture the long load concentration plates 52 with high dimensional accuracy.

そこで、本発明の目的は、長尺の荷重集中板であっても、低コストで且つ寸法精度良く製造することができる荷重集中板及びその製造方法、及びそれを備えた衝撃検知光ファイバセンサを提供することにある。   Therefore, an object of the present invention is to provide a load concentrating plate that can be manufactured at a low cost and with high dimensional accuracy even for a long load concentrating plate, a manufacturing method thereof, and an impact detection optical fiber sensor including the same. It is to provide.

上記目的を達成するために、請求項１の発明は、衝撃を検知するための光ファイバと、該光ファイバの一端に接続された発光素子と、上記光ファイバの他端に接続された受光素子と、上記光ファイバに沿って設けられ、その光ファイバに衝撃荷重を付与すべく長手方向に沿って複数の突起が形成される荷重集中板とを備えた衝撃検知光ファイバセンサにおいて、上記荷重集中板が、リボン状の板の長手方向に孔明用パンチで所定間隔を隔てて形成された複数の孔と、それら孔間に形成された接続部とを備え、上記接続部の長手方向両端部の上面がプレスにて曲面状に形成され、その接続部が上記突起をなすことを特徴とする衝撃検知光ファイバセンサである。 In order to achieve the above object, an invention according to claim 1 is directed to an optical fiber for detecting an impact, a light emitting element connected to one end of the optical fiber, and a light receiving element connected to the other end of the optical fiber. And a load concentrating plate provided along the optical fiber and formed with a plurality of protrusions along the longitudinal direction so as to apply an impact load to the optical fiber. The plate includes a plurality of holes formed at predetermined intervals with a punch for punching in the longitudinal direction of the ribbon-like plate, and connection portions formed between the holes, and at both ends in the longitudinal direction of the connection portion. The impact detection optical fiber sensor is characterized in that an upper surface is formed into a curved surface by a press , and a connecting portion thereof forms the protrusion.

請求項２の発明は、上記接続部の長手方向両端部が、平面視鳩尾形状或いは平面視四角形状に形成された請求項１記載の衝撃検知光ファイバセンサである。   The invention according to claim 2 is the impact detection optical fiber sensor according to claim 1, wherein both end portions in the longitudinal direction of the connecting portion are formed in a dovetail shape in a plan view or a quadrangular shape in a plan view.

請求項３の発明は、光ファイバに沿って設けられ、その光ファイバに衝撃荷重を付与すべく長手方向に沿って複数の突起が形成される荷重集中板において、リボン状の板の長手方向に孔明用パンチで所定間隔を隔てて形成された複数の孔と、それら孔間に形成された接続部とを備え、上記接続部の長手方向両端部の上面がプレスにて曲面状に形成され、その接続部が上記突起をなすことを特徴とする荷重集中板である。 According to a third aspect of the present invention, there is provided a load concentration plate provided along an optical fiber, wherein a plurality of protrusions are formed along the longitudinal direction so as to apply an impact load to the optical fiber. A plurality of holes formed at predetermined intervals with a punch for punching, and a connection portion formed between the holes, the upper surface of both ends in the longitudinal direction of the connection portion is formed into a curved shape by a press , The load concentrating plate is characterized in that the connecting portion forms the protrusion.

請求項４の発明は、上記接続部の長手方向両端部が、平面視鳩尾形状或いは平面視四角形状に形成された請求項３記載の荷重集中板である。   The invention according to claim 4 is the load concentrating plate according to claim 3, wherein both ends in the longitudinal direction of the connecting portion are formed in a dovetail shape in a plan view or a quadrangular shape in a plan view.

請求項５の発明は、光ファイバに沿って設けられ、その光ファイバに衝撃荷重を付与すべく長手方向に沿って複数の突起が形成される荷重集中板の製造方法において、リボン状の板に、長手方向に所定間隔を隔てて複数の孔を形成し、それら孔間に形成された接続部の長手方向両端部をプレスにて曲面状に加工し、その接続部を上記突起とすることを特徴とする荷重集中板の製造方法である。   According to a fifth aspect of the present invention, there is provided a method for manufacturing a load concentration plate provided along an optical fiber, wherein a plurality of protrusions are formed along the longitudinal direction so as to apply an impact load to the optical fiber. Forming a plurality of holes at a predetermined interval in the longitudinal direction, processing both ends in the longitudinal direction of the connecting portion formed between the holes into a curved surface by pressing, and forming the connecting portion as the protrusion It is the manufacturing method of the load concentration board characterized.

請求項６の発明は、上記複数の孔が略Ｉ字状であり、それら略Ｉ字状の孔間に形成された接続部が、その長手方向両端部に突出部を有し、その突出部の上面をプレスにて曲面状に加工する請求項５記載の荷重集中板の製造方法である。   According to a sixth aspect of the present invention, the plurality of holes are substantially I-shaped, and the connecting portion formed between the substantially I-shaped holes has protrusions at both longitudinal ends thereof, and the protrusions 6. A method for producing a load concentrating plate according to claim 5, wherein the upper surface of the substrate is processed into a curved surface by a press.

請求項７の発明は、上記突出部を曲面加工用パンチで押し拡げ、その上面を曲面状に形成すると共に、平面視鳩尾形状に形成する請求項６記載の荷重集中板の製造方法である。   A seventh aspect of the present invention is the method for manufacturing a load concentrating plate according to the sixth aspect of the present invention, wherein the projecting portion is expanded by a curved surface processing punch, and the upper surface thereof is formed into a curved surface shape and formed into a dovetail shape in plan view.

請求項８の発明は、上記複数の孔が略四角形状であり、それら略四角形状の孔間に形成された接続部の長手方向両端部の上面をプレスにて曲面状に加工する請求項５記載の荷重集中板の製造方法である。   According to an eighth aspect of the present invention, the plurality of holes have a substantially quadrangular shape, and the upper surfaces of both ends in the longitudinal direction of the connecting portion formed between the substantially quadrangular holes are processed into a curved surface shape by pressing. It is a manufacturing method of the load concentration board of description.

請求項９の発明は、上記接続部の長手方向両端部を曲面加工用パンチで押しつぶして、上記リボン状の板を幅方向外側に押し拡げ、その後、そのリボン状の板の幅方向両端部を直線状に切断する請求項８記載の荷重集中板の製造方法である。   According to the ninth aspect of the present invention, both end portions in the longitudinal direction of the connecting portion are crushed with a punch for curved surface processing, the ribbon-like plate is spread outward in the width direction, and then both end portions in the width direction of the ribbon-like plate are expanded. It is a manufacturing method of the load concentration board of Claim 8 cut | disconnected in linear form.

本発明によれば、長尺の荷重集中板であっても、低コストで且つ寸法精度良く製造することができるという優れた効果を奏する。   According to this invention, even if it is a long load concentration board, there exists an outstanding effect that it can manufacture at low cost and with sufficient dimensional accuracy.

以下、本発明の好適な実施形態を添付図面に基づいて詳述する。   DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

図１は、本発明の第一実施形態に係る荷重集中板を備えた衝撃検知光ファイバセンサを示し、（ａ）は側面断面図であり、（ｂ）は図１（ａ）のＩｂ−Ｉｂ線矢視断面図である。図２は、第一実施形態に係る荷重集中板を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。   FIG. 1 shows an impact detection optical fiber sensor provided with a load concentrating plate according to a first embodiment of the present invention, (a) is a side sectional view, and (b) is Ib-Ib in FIG. 1 (a). FIG. FIG. 2 shows a load concentrating plate according to the first embodiment, wherein (a) is a side sectional view and (b) is a plan view.

図１に示すように、衝撃検知光ファイバセンサ１０は、衝撃を検知するための光ファイバ１と、光ファイバ１の一端に接続された半導体レーザ等の発光素子（図示せず）と、光ファイバ１の他端に接続されたフォトダイオード等の受光素子（図示せず）と、光ファイバ１の長手方向に沿って延出させて設けられた荷重集中板１１とを備えている。光ファイバ１と荷重集中板１１とは、モールド材３によりモールドされて一体化されており、これら光ファイバ１、荷重集中板１１及びモールド材３がセンサ１０のセンサ部４を構成している。   As shown in FIG. 1, an impact detection optical fiber sensor 10 includes an optical fiber 1 for detecting an impact, a light emitting element (not shown) such as a semiconductor laser connected to one end of the optical fiber 1, an optical fiber, and the like. 1 is provided with a light receiving element (not shown) such as a photodiode connected to the other end of the optical fiber 1 and a load concentrating plate 11 extending along the longitudinal direction of the optical fiber 1. The optical fiber 1 and the load concentration plate 11 are molded and integrated by a molding material 3, and the optical fiber 1, the load concentration plate 11 and the molding material 3 constitute a sensor unit 4 of the sensor 10.

光ファイバ１は、光を伝搬するための断面略円形状のコア５と、コア５の外周面に被覆させて設けられた断面略円形状のクラッド層６とから構成されている。クラッド層６は、コア５に対して同心上に設けられる。   The optical fiber 1 includes a core 5 having a substantially circular cross section for propagating light, and a clad layer 6 having a substantially circular cross section provided to cover the outer peripheral surface of the core 5. The clad layer 6 is provided concentrically with the core 5.

光ファイバ１としては、プラスチック光ファイバ（ＰＯＦ）を用いることができる。その場合、ＰＯＦ１のコア５は、耐熱性に優れた合成樹脂（例えば、アクリル樹脂、架橋アクリル樹脂（熱硬化アクリル樹脂）、或いは、シリコーン樹脂）からなり、ＰＯＦ１のクラッド層６は、耐熱性、耐水性及び機械的特性に優れた合成樹脂（例えば、ふっ化エチレンプロピレン樹脂（ＦＥＰ）等のふっ素樹脂）からなる。   As the optical fiber 1, a plastic optical fiber (POF) can be used. In that case, the core 5 of the POF 1 is made of a synthetic resin excellent in heat resistance (for example, acrylic resin, cross-linked acrylic resin (thermosetting acrylic resin), or silicone resin), and the cladding layer 6 of the POF 1 has heat resistance, It consists of a synthetic resin excellent in water resistance and mechanical properties (for example, a fluorine resin such as a fluoroethylenepropylene resin (FEP)).

荷重集中板１１は、鉄（例えば、冷間圧延鋼板（ＳＰＣＣ−ＳＤ））からなる。   The load concentration plate 11 is made of iron (for example, cold rolled steel plate (SPCC-SD)).

図１及び図２に示すように、荷重集中板１１は、リボン状の板１２の長手方向に所定間隔を隔てて形成された複数の略Ｉ字状の孔１３（図２（ｂ）参照）と、それら隣接する孔１３間に形成された接続部１４とを備えている。接続部１４の長手方向両端部には、上面が曲面状に形成された突出部１５が設けられている。突出部１５は、平面視鳩尾形状（或いは平面視台形状）に形成されている（図２（ｂ）参照）。   As shown in FIGS. 1 and 2, the load concentrating plate 11 has a plurality of substantially I-shaped holes 13 formed at predetermined intervals in the longitudinal direction of the ribbon-like plate 12 (see FIG. 2B). And a connecting portion 14 formed between the adjacent holes 13. At both ends in the longitudinal direction of the connecting portion 14, protruding portions 15 having an upper surface formed in a curved shape are provided. The protrusion 15 is formed in a dovetail shape in plan view (or a trapezoidal shape in plan view) (see FIG. 2B).

各接続部１４の長手方向中央部の上面がＰＯＦ１と接触するようになっている。これら接続部１４がＰＯＦ１に衝撃荷重を付与するための突起を構成している。   The upper surface of the central portion in the longitudinal direction of each connection portion 14 is in contact with POF 1. These connecting portions 14 constitute protrusions for applying an impact load to the POF 1.

以下、荷重集中板１１の製造方法を図３及び図４により説明する。   Hereinafter, a method of manufacturing the load concentration plate 11 will be described with reference to FIGS.

図３は、第一実施形態に係る荷重集中板の製造方法の第一工程を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。図４は、第一実施形態に係る荷重集中板の製造方法の第二工程を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。   Drawing 3 shows the 1st process of the manufacturing method of the load concentration board concerning a first embodiment, (a) is a side sectional view and (b) is a top view. FIG. 4 shows a second step of the method for manufacturing a load concentration plate according to the first embodiment, wherein (a) is a side sectional view and (b) is a plan view.

まず、図３に示すリボン状の板１２に、長手方向に所定間隔を隔てて複数の略Ｉ字状の孔１３（図４（ｂ）参照）をプレスにて形成する。板１２に孔１３を形成するための孔形成用金型は、板１２を設置するためのダイ（図示せず）と、このダイよりも上方に上下動自在に設けられた孔明用パンチ２１と、孔明用パンチ２１の側方に上下動自在に設けられ、板１２をダイ上に押えるためのパッド（図示せず）とを備えている。孔明用パンチ２１の下端部には、板１２に略Ｉ字状の孔１３を形成すべく、下方から見て略Ｉ字状に形成されたプレス部２２が設けられる。なお、図３においては、一つの孔明用パンチ２１のみが示されているが、板１２の長手方向に孔明用パンチ２１を複数配置しても良い。   First, a plurality of substantially I-shaped holes 13 (see FIG. 4B) are formed by pressing in the ribbon-like plate 12 shown in FIG. 3 at a predetermined interval in the longitudinal direction. The hole forming mold for forming the hole 13 in the plate 12 includes a die (not shown) for installing the plate 12, and a punching punch 21 provided above the die so as to be movable up and down. A pad (not shown) is provided on the side of the punching punch 21 so as to be movable up and down and for pressing the plate 12 onto the die. In the lower end portion of the punch 21 for punching, a press portion 22 formed in a substantially I shape when viewed from below is provided in order to form a substantially I-shaped hole 13 in the plate 12. In FIG. 3, only one punching punch 21 is shown, but a plurality of punching punches 21 may be arranged in the longitudinal direction of the plate 12.

板１２をダイの上に設置した状態で孔明用パンチ２１及びパッドを板１２上へと下降させ、ダイとパッドとで板を挟み込むと共に、板１２に孔明用パンチ２１のプレス部２２を押しつけることで、板１２に略Ｉ字状の孔１３を形成する。同様に、板１２の長手方向にわたって、孔１３を順次形成していく。これにより、図４に示すように、隣接する孔１３間に接続部１４が形成される。本実施形態においては、孔１３を略Ｉ字状に形成したため、各接続部１４の長手方向両端部には突出部１５が設けられると共に、その突出部１５の両側（図４（ｂ）中の上下方向）には、後述する曲面加工の際に押し拡げられた材料を逃がすための材料逃部２３が形成される。   With the plate 12 placed on the die, the punching punch 21 and the pad are lowered onto the plate 12, the plate is sandwiched between the die and the pad, and the pressing portion 22 of the punching punch 21 is pressed against the plate 12. Thus, a substantially I-shaped hole 13 is formed in the plate 12. Similarly, the holes 13 are sequentially formed over the longitudinal direction of the plate 12. Thereby, as shown in FIG. 4, a connection portion 14 is formed between the adjacent holes 13. In the present embodiment, since the hole 13 is formed in a substantially I shape, protrusions 15 are provided at both ends in the longitudinal direction of each connection part 14, and both sides of the protrusions 15 (in FIG. 4B). In the vertical direction), a material escape portion 23 is formed for releasing the material that has been expanded during the curved surface processing described later.

次に、接続部１４の突出部１５の上面をプレスにて曲面状に加工する。突出部１５の上面を曲面状に加工するための曲面加工用金型は、板１２を設置するためのダイ（図示せず）と、このダイよりも上方に上下動自在に設けられた曲面加工用パンチ２４と、曲面加工用パンチ２４の側方に上下動自在に設けられ、板１２をダイ上に押えるためのパッド（図示せず）とを備えている。なお、図４においては、一つの曲面加工用パンチ２４のみが示されているが、板１２の長手方向に曲面加工用パンチ２４を複数配置しても良い。   Next, the upper surface of the protruding portion 15 of the connecting portion 14 is processed into a curved surface shape by a press. A curved surface processing die for processing the upper surface of the protruding portion 15 into a curved surface has a die (not shown) for installing the plate 12 and a curved surface processing provided so as to be vertically movable above the die. And a pad (not shown) for pressing the plate 12 on the die. In FIG. 4, only one curved surface processing punch 24 is shown, but a plurality of curved surface processing punches 24 may be arranged in the longitudinal direction of the plate 12.

曲面加工用パンチ２４の幅は、突出部１５の幅よりも大きく形成される。本実施形態においては、曲面加工用パンチ２４の幅は、孔１３の幅よりもわずかに小さく形成される。曲面加工用パンチ２４の下端部には、プレス部２５が凹設されている。プレス部２５の長手方向中央部２６は平面状に形成されており、プレス部２５の長手方向両端部２７（図４（ａ）中の左右端部）は突出部１５の上面を曲面状に押しつぶすべく、Ｒ形状に形成されている。   The width of the curved surface processing punch 24 is formed larger than the width of the protrusion 15. In the present embodiment, the width of the curved surface processing punch 24 is slightly smaller than the width of the hole 13. A press portion 25 is recessed in the lower end portion of the curved surface processing punch 24. The central portion 26 in the longitudinal direction of the press portion 25 is formed in a flat shape, and both longitudinal end portions 27 (left and right end portions in FIG. 4A) of the press portion 25 crush the upper surface of the protruding portion 15 into a curved shape. Therefore, it is formed in an R shape.

板１２をダイの上に設置した状態で曲面加工用パンチ２４及びパッドを板１２上へと下降させ、ダイとパッドとで板を挟み込むと共に、接続部１４の突出部１５の上面に曲面加工用パンチ２４のプレス部２５の長手方向端部２７を押しつける。これにより、突出部１５が曲面加工用パンチ２４で押し拡げられて、その突出部１５の上面のみが曲面状に加工される。その際、押し拡げられた材料が材料逃部２３へと逃げるため、突出部１５が幅方向外側に押し拡げられて平面視鳩尾形状に形成される。同様に、板１２の長手方向にわたって、突出部１５の上面を曲面状に加工していく。これにより、図１及び図２で示した荷重集中板１１を得ることができる。   With the plate 12 placed on the die, the curved surface processing punch 24 and the pad are lowered onto the plate 12, the plate is sandwiched between the die and the pad, and the upper surface of the protruding portion 15 of the connecting portion 14 is used for curved surface processing. The longitudinal end portion 27 of the press portion 25 of the punch 24 is pressed. As a result, the protrusion 15 is expanded by the curved surface processing punch 24, and only the upper surface of the protrusion 15 is processed into a curved surface. At that time, since the expanded material escapes to the material escape portion 23, the projecting portion 15 is expanded outward in the width direction to form a dovetail shape in plan view. Similarly, the upper surface of the protruding portion 15 is processed into a curved surface along the longitudinal direction of the plate 12. Thereby, the load concentration board 11 shown in FIG.1 and FIG.2 can be obtained.

以上、本実施形態においては、リボン状の板１２に、長手方向に所定間隔を隔てて複数の略Ｉ字状の孔１３を形成し、それら孔１３間に形成された接続部１４の長手方向両端部に設けられる突出部１５の上面をプレスにて曲面状に加工し、その接続部１４をＰＯＦ１に衝撃荷重を付与するための突起としている。プレス加工は、液中ワイヤ放電のように水槽内で行う必要はなく、比較的長尺の板１２であってもプレスする位置を適宜ずらしていくことで加工することが可能である。従って、本実施形態によれば、長尺の荷重集中板であっても、複数の短尺の荷重集中板を溶接等により長手方向に連結する必要がないので、低コストで且つ寸法精度良く製造することができる。   As described above, in the present embodiment, a plurality of substantially I-shaped holes 13 are formed in the ribbon-like plate 12 at a predetermined interval in the longitudinal direction, and the longitudinal direction of the connecting portion 14 formed between the holes 13 is formed. The upper surface of the protruding portion 15 provided at both end portions is processed into a curved surface shape by a press, and the connecting portion 14 is a projection for applying an impact load to the POF 1. The pressing process does not need to be performed in the water tank as in the case of submerged wire discharge, and even a relatively long plate 12 can be processed by appropriately shifting the pressing position. Therefore, according to this embodiment, even if it is a long load concentration plate, it is not necessary to connect a plurality of short load concentration plates in the longitudinal direction by welding or the like. be able to.

ところで、センサ１０を製造すべく、荷重集中板１１等をモールド材３によりモールドする際には、押出し工法を用いる場合がある。この押出し工法は、荷重集中板１１を押出し機（図示せず）の挿入口から差し込んで、生ゴム（モールド材３）で覆われた荷重集中板１１を押出し機の排出口側へと押し出すようにするものである。   By the way, when the load concentration plate 11 and the like are molded with the molding material 3 in order to manufacture the sensor 10, an extrusion method may be used. In this extrusion method, the load concentration plate 11 is inserted from an insertion port of an extruder (not shown), and the load concentration plate 11 covered with raw rubber (mold material 3) is pushed out to the discharge port side of the extruder. To do.

この押出し工法を行う際、押出し機の排出口側には、モールド材３の形状を制御するための心口金が設けられる。よって、押出し工法を行う際には、荷重集中板１１と心口金との寸法誤差（位置ズレ）を小さくしておく必要がある。そこで、本実施形態によれば、荷重集中板１１を寸法精度良く製造することができるため、感度バラツキが小さく、且つ、寸法精度が良いセンサ１０を製造することができる。   When this extrusion method is performed, a core die for controlling the shape of the molding material 3 is provided on the discharge port side of the extruder. Therefore, when performing the extrusion method, it is necessary to reduce a dimensional error (positional deviation) between the load concentration plate 11 and the core plate. Therefore, according to this embodiment, since the load concentration plate 11 can be manufactured with high dimensional accuracy, the sensor 10 with small sensitivity variation and high dimensional accuracy can be manufactured.

次に、第二実施形態に係る荷重集中板を備えた衝撃検知光ファイバセンサについて説明する。   Next, an impact detection optical fiber sensor provided with a load concentration plate according to the second embodiment will be described.

図５は、本発明の第二実施形態に係る荷重集中板を備えた衝撃検知光ファイバセンサを示し、（ａ）は側面断面図であり、（ｂ）は図５（ａ）のＶｂ−Ｖｂ線矢視断面図である。図６は、第二実施形態に係る荷重集中板を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。   5A and 5B show an impact detection optical fiber sensor provided with a load concentration plate according to a second embodiment of the present invention, wherein FIG. 5A is a side sectional view, and FIG. 5B is Vb-Vb in FIG. FIG. FIG. 6 shows a load concentration plate according to the second embodiment, where (a) is a side sectional view and (b) is a plan view.

図５に示す衝撃検知光ファイバセンサ３０は、荷重集中板３１の形状が図１の荷重集中板１１とは一部異なる。センサ３０のその他の構成は、図１で示したセンサ１０と同じである。従って、同一部材には同一符号を付して、その説明を省略する。   The impact detection optical fiber sensor 30 shown in FIG. 5 is partially different from the load concentration plate 11 in FIG. Other configurations of the sensor 30 are the same as those of the sensor 10 shown in FIG. Accordingly, the same members are denoted by the same reference numerals, and the description thereof is omitted.

図５及び図６に示すように、荷重集中板３１は、リボン状の板３２の長手方向に所定間隔を隔てて形成された複数の略四角形状の孔３３（図６（ｂ）参照）と、それら隣接する孔３３間に形成された接続部３４とを備えている。接続部３４の長手方向両端部には、上面が曲面状に形成された曲面部３５が設けられている。曲面部３５は、平面視四角形状に形成されている（図６（ｂ）参照）。   As shown in FIGS. 5 and 6, the load concentration plate 31 includes a plurality of substantially rectangular holes 33 (see FIG. 6B) formed at predetermined intervals in the longitudinal direction of the ribbon-like plate 32. , And a connecting portion 34 formed between the adjacent holes 33. At both ends in the longitudinal direction of the connection portion 34, curved surface portions 35 having upper surfaces formed in a curved shape are provided. The curved surface portion 35 is formed in a square shape in plan view (see FIG. 6B).

各接続部３４の長手方向中央部の上面がＰＯＦ１と接触するようになっている。これら接続部３４がＰＯＦ１に衝撃荷重を付与するための突起を構成している。   The upper surface of the central portion in the longitudinal direction of each connection portion 34 comes into contact with POF 1. These connecting portions 34 constitute protrusions for applying an impact load to the POF 1.

以下、荷重集中板３１の製造方法を図７から図９により説明する。   Hereinafter, a method of manufacturing the load concentration plate 31 will be described with reference to FIGS.

図７は、第二実施形態に係る荷重集中板の製造方法の第一工程を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。図８は、第二実施形態に係る荷重集中板の製造方法の第二工程を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。図９は、第二実施形態に係る荷重集中板の製造方法の第三工程を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。   Drawing 7 shows the 1st process of the manufacturing method of the load concentration board concerning a second embodiment, (a) is a side sectional view and (b) is a top view. FIG. 8: shows the 2nd process of the manufacturing method of the load concentration board which concerns on 2nd embodiment, (a) is side surface sectional drawing, (b) is a top view. FIG. 9 shows a third step of the method for manufacturing the load concentration plate according to the second embodiment, wherein (a) is a side sectional view and (b) is a plan view.

まず、図７に示すリボン状の板３２に、長手方向に所定間隔を隔てて複数の略四角形状の孔３３（図８（ｂ）参照）をプレスにて形成する。板３２に孔３３を形成するための孔形成用金型は、板３２を設置するためのダイ（図示せず）と、このダイよりも上方に上下動自在に設けられた孔明用パンチ４１と、孔明用パンチ４１の側方に上下動自在に設けられ、板３２をダイ上に押えるためのパッド（図示せず）とを備えている。孔明用パンチ４１の下端部には、板３２に略四角形状の孔３３を形成すべく、下方から見て略四角形状に形成されたプレス部４２が設けられる。なお、図７においては、一つの孔明用パンチ４１のみが示されているが、板３２の長手方向に孔明用パンチ４１を複数配置しても良い。   First, a plurality of substantially square-shaped holes 33 (see FIG. 8B) are formed by pressing in the ribbon-like plate 32 shown in FIG. 7 at predetermined intervals in the longitudinal direction. The hole forming mold for forming the hole 33 in the plate 32 includes a die (not shown) for installing the plate 32, and a punching punch 41 provided above the die so as to be movable up and down. A pad (not shown) is provided on the side of the punch 41 for punching so as to be movable up and down and for pressing the plate 32 onto the die. At the lower end of the punch 41 for punching, in order to form a substantially square hole 33 in the plate 32, a press part 42 formed in a substantially square shape when viewed from below is provided. In FIG. 7, only one punching punch 41 is shown, but a plurality of punching punches 41 may be arranged in the longitudinal direction of the plate 32.

板３２をダイの上に設置した状態で孔明用パンチ４１及びパッドを板３２上へと下降させ、ダイとパッドとで板３２を挟み込むと共に、板３２に孔明用パンチ４１のプレス部４２を押しつけることで、板４１に略四角形状の孔３３を形成する。同様に、板３２の長手方向にわたって、孔３３を順次形成していく。これにより、図８に示すように、隣接する孔３３間に接続部３４が形成される。   With the plate 32 placed on the die, the punching punch 41 and the pad are lowered onto the plate 32, the plate 32 is sandwiched between the die and the pad, and the pressing portion 42 of the punching punch 41 is pressed against the plate 32. Thus, a substantially square hole 33 is formed in the plate 41. Similarly, the holes 33 are sequentially formed over the longitudinal direction of the plate 32. As a result, as shown in FIG. 8, a connecting portion 34 is formed between the adjacent holes 33.

次に、接続部３４の長手方向両端部の上面をプレスにて曲面状に加工する。接続部３４の長手方向両端部の上面を曲面状に加工するための曲面加工用金型は、板３２を設置するためのダイ（図示せず）と、このダイよりも上方に上下動自在に設けられた曲面加工用パンチ４４と、曲面加工用パンチ４４の側方に上下動自在に設けられ、板３２をダイ上に押えるためのパッド（図示せず）とを備えている。なお、図８においては、一つの曲面加工用パンチ４４のみが示されているが、板３２の長手方向に曲面加工用パンチ４４を複数配置しても良い。   Next, the upper surface of both ends in the longitudinal direction of the connecting portion 34 is processed into a curved surface shape by a press. A curved surface processing die for processing the upper surface of both end portions in the longitudinal direction of the connection portion 34 into a curved surface is freely movable up and down above the die (not shown) for installing the plate 32. A curved surface processing punch 44 is provided, and a pad (not shown) is provided on the side of the curved surface processing punch 44 so as to be movable up and down and press the plate 32 onto the die. In FIG. 8, only one curved surface processing punch 44 is shown, but a plurality of curved surface processing punches 44 may be arranged in the longitudinal direction of the plate 32.

本実施形態においては、曲面加工用パンチ４４の幅は、孔３３の幅よりもわずかに小さく形成される。曲面加工用パンチ４４の下端部には、プレス部４５が凹設されている。プレス部４５の長手方向中央部４６は平面状に形成されており、プレス部４５の長手方向両端部４７（図８（ａ）中の左右端部）は接続部３４の長手方向両端部の上面を曲面状に押しつぶすべく、Ｒ形状に形成されている。   In the present embodiment, the width of the curved surface processing punch 44 is slightly smaller than the width of the hole 33. A press portion 45 is recessed in the lower end portion of the curved surface processing punch 44. The central part 46 in the longitudinal direction of the press part 45 is formed in a planar shape, and both longitudinal end parts 47 (left and right end parts in FIG. 8A) of the press part 45 are upper surfaces of both longitudinal end parts of the connection part 34. Is formed in an R shape so as to be crushed into a curved surface.

板３２をダイの上に設置した状態で曲面加工用パンチ４４及びパッドを板３２上へと下降させ、ダイとパッドとで板３２を挟み込むと共に、接続部３４の長手方向両端部の上面に曲面加工用パンチ４４のプレス部４５の長手方向端部４７を押しつける。これにより、接続部３４の長手方向両端部が曲面加工用パンチ４４で押しつぶされて、その長手方向両端部の上面のみが曲面状に加工される。同様に、板３２の長手方向にわたって、接続部３４の長手方向両端部の上面を曲面状に加工していく。   With the plate 32 placed on the die, the curved surface processing punch 44 and the pad are lowered onto the plate 32, the plate 32 is sandwiched between the die and the pad, and curved surfaces are formed on the upper surfaces of both ends in the longitudinal direction of the connecting portion 34. A longitudinal end portion 47 of the press portion 45 of the processing punch 44 is pressed. As a result, both end portions in the longitudinal direction of the connecting portion 34 are crushed by the curved surface processing punch 44, and only the upper surfaces of both end portions in the longitudinal direction are processed into curved surfaces. Similarly, the upper surfaces of both end portions in the longitudinal direction of the connecting portion 34 are processed into a curved shape over the longitudinal direction of the plate 32.

これにより、図９に示すように、接続部３４の長手方向両端部に平面視四角形状の曲面部３５が形成される。また、曲面部３５の両側には図４で示したような材料逃部２３（図４（ｂ）参照）が存在しないため、板３２が幅方向外側に押し拡げられて、リボン状の板３２の幅方向両端部に変形部４８が形成される。   As a result, as shown in FIG. 9, a curved surface portion 35 having a rectangular shape in plan view is formed at both ends in the longitudinal direction of the connection portion 34. Further, since the material escape portion 23 (see FIG. 4B) as shown in FIG. 4 does not exist on both sides of the curved surface portion 35, the plate 32 is expanded outward in the width direction, and the ribbon-like plate 32 is formed. Deformed portions 48 are formed at both ends in the width direction.

次に、板３２の幅方向両端部に形成された変形部４８を除去すべく、板３２の幅方向両端部をプレスにて直線状に切断する。板３２の幅方向両端部の切断に用いる切断用金型は、板３２を設置するためのダイ（図示せず）と、このダイよりも上方に上下動自在に設けられた切刃（図示せず）と、この切刃の側方に上下動自在に設けられ、板３２をダイ上に押えるためのパッド（図示せず）とを備えている。   Next, both end portions in the width direction of the plate 32 are linearly cut by a press in order to remove the deformed portions 48 formed at both end portions in the width direction of the plate 32. The cutting mold used for cutting both ends in the width direction of the plate 32 includes a die (not shown) for installing the plate 32, and a cutting blade (not shown) provided above the die so as to be movable up and down. And a pad (not shown) for pressing the plate 32 on the die.

板３２をダイの上に設置した状態で切刃及びパッドを板３２上へと下降させ、ダイとパッドとで板３２を挟み込むと共に、板３２の幅方向両端部を直線状に切断する。これにより、変形部４８を板３２から除去して、図５及び図６で示した荷重集中板３１を得ることができる。   While the plate 32 is placed on the die, the cutting blade and the pad are lowered onto the plate 32, the plate 32 is sandwiched between the die and the pad, and both ends in the width direction of the plate 32 are cut linearly. Thereby, the deformation | transformation part 48 can be removed from the board 32, and the load concentration board 31 shown in FIG.5 and FIG.6 can be obtained.

以上、本実施形態においては、リボン状の板３２に、長手方向に所定間隔を隔てて複数の略四角形状の孔３３を形成し、それら孔３３間に形成された接続部３４の長手方向両端部の上面をプレスにて曲面状に加工し、その接続部３４をＰＯＦ１に衝撃荷重を付与するための突起としている。プレス加工は、液中ワイヤ放電のように水槽内で行う必要はなく、比較的長尺の板３２であってもプレスする位置を適宜ずらしていくことで加工することが可能である。従って、本実施形態によれば、長尺の荷重集中板であっても、複数の短尺の荷重集中板を溶接等により長手方向に連結する必要がないので、低コストで且つ寸法精度良く製造することができる。   As described above, in the present embodiment, a plurality of substantially quadrangular holes 33 are formed in the ribbon-like plate 32 at predetermined intervals in the longitudinal direction, and both longitudinal ends of the connecting portion 34 formed between the holes 33 are formed. The upper surface of the part is processed into a curved surface by a press, and the connecting part 34 is a protrusion for applying an impact load to the POF 1. The pressing process does not need to be performed in the water tank like in-wire wire discharge, and even a relatively long plate 32 can be processed by appropriately shifting the pressing position. Therefore, according to this embodiment, even if it is a long load concentration plate, it is not necessary to connect a plurality of short load concentration plates in the longitudinal direction by welding or the like. be able to.

ここで、本明細書及び請求の範囲における「リボン状の板」は、全長が幅に比べて長い板、すなわち、細長い板を示す。   Here, the “ribbon-like plate” in the present specification and claims refers to a plate whose overall length is longer than the width, that is, an elongated plate.

本発明は以上説明した実施形態には限定はされない。   The present invention is not limited to the embodiment described above.

例えば、荷重集中板１１、３１の材質は上述の実施形態には限定はされない。例えば、硬質性のプラスチック、真ちゅう（ＢＳ）或いはステンレス鋼（ＳＵＳ）等を用いることができる。   For example, the material of the load concentration plates 11 and 31 is not limited to the above-described embodiment. For example, hard plastic, brass (BS), stainless steel (SUS), or the like can be used.

また、リボン状の板３２の幅方向両端部の切断は、プレス加工には限定されず、切削加工等の他の手段により行っても良い。   Moreover, the cutting of the both ends in the width direction of the ribbon-shaped plate 32 is not limited to the press working, and may be performed by other means such as a cutting work.

さらに、光ファイバ１のコア５及びクラッド層６の断面形状は上述の実施形態には限定はされない。例えば、断面矩形状や断面楕円形状等の他の形状であっても良い。   Furthermore, the cross-sectional shapes of the core 5 and the cladding layer 6 of the optical fiber 1 are not limited to the above-described embodiment. For example, other shapes such as a rectangular cross section and an elliptical cross section may be used.

本発明の第一実施形態に係る荷重集中板を備えた衝撃検知光ファイバセンサを示し、（ａ）は側面断面図であり、（ｂ）は図１（ａ）のＩｂ−Ｉｂ線矢視断面図である。The impact detection optical fiber sensor provided with the load concentration board which concerns on 1st embodiment of this invention is shown, (a) is side surface sectional drawing, (b) is the Ib-Ib arrow directional cross section of Fig.1 (a). FIG. 第一実施形態に係る荷重集中板を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。The load concentration board which concerns on 1st embodiment is shown, (a) is side surface sectional drawing, (b) is a top view. 第一実施形態に係る荷重集中板の製造方法の第一工程を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。The 1st process of the manufacturing method of the load concentration board which concerns on 1st embodiment is shown, (a) is side surface sectional drawing, (b) is a top view. 第一実施形態に係る荷重集中板の製造方法の第二工程を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。The 2nd process of the manufacturing method of the load concentration board which concerns on 1st embodiment is shown, (a) is side surface sectional drawing, (b) is a top view. 本発明の第二実施形態に係る荷重集中板を備えた衝撃検知光ファイバセンサを示し、（ａ）は側面断面図であり、（ｂ）は図５（ａ）のＶｂ−Ｖｂ線矢視断面図である。The impact detection optical fiber sensor provided with the load concentration board which concerns on 2nd embodiment of this invention is shown, (a) is side surface sectional drawing, (b) is the Vb-Vb arrow directional cross section of Fig.5 (a). FIG. 第二実施形態に係る荷重集中板を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。The load concentration board which concerns on 2nd embodiment is shown, (a) is side sectional drawing, (b) is a top view. 第二実施形態に係る荷重集中板の製造方法の第一工程を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。The 1st process of the manufacturing method of the load concentration board which concerns on 2nd embodiment is shown, (a) is side sectional drawing, (b) is a top view. 第二実施形態に係る荷重集中板の製造方法の第二工程を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。The 2nd process of the manufacturing method of the load concentration board which concerns on 2nd embodiment is shown, (a) is side sectional drawing, (b) is a top view. 第二実施形態に係る荷重集中板の製造方法の第三工程を示し、（ａ）は側面断面図であり、（ｂ）は平面図である。The 3rd process of the manufacturing method of the load concentration board which concerns on 2nd embodiment is shown, (a) is side surface sectional drawing, (b) is a top view. 従来の荷重集中板を備えた衝撃検知光ファイバセンサを示し、（ａ）は側面断面図であり、（ｂ）は図１０（ａ）のＸｂ−Ｘｂ線矢視断面図である。The impact detection optical fiber sensor provided with the conventional load concentration board is shown, (a) is side surface sectional drawing, (b) is Xb-Xb arrow directional cross-sectional view of Fig.10 (a).

符号の説明Explanation of symbols

１ 光ファイバ
１０、３０ 衝撃検知光ファイバセンサ
１１、３１ 荷重集中板
１２、３２ 板
１３、３３ 孔
１４、３４ 接続部
１５ 突出部
２４、４４ 曲面加工用パンチ
DESCRIPTION OF SYMBOLS 1 Optical fiber 10, 30 Impact detection optical fiber sensor 11, 31 Load concentration board 12, 32 Board 13, 33 Hole 14, 34 Connection part 15 Protrusion part 24, 44 Curved surface processing punch

Claims (9)

衝撃を検知するための光ファイバと、該光ファイバの一端に接続された発光素子と、上記光ファイバの他端に接続された受光素子と、上記光ファイバに沿って設けられ、その光ファイバに衝撃荷重を付与すべく長手方向に沿って複数の突起が形成される荷重集中板とを備えた衝撃検知光ファイバセンサにおいて、上記荷重集中板が、リボン状の板の長手方向に孔明用パンチで所定間隔を隔てて形成された複数の孔と、それら孔間に形成された接続部とを備え、上記接続部の長手方向両端部の上面がプレスにて曲面状に形成され、その接続部が上記突起をなすことを特徴とする衝撃検知光ファイバセンサ。 An optical fiber for detecting an impact, a light emitting element connected to one end of the optical fiber, a light receiving element connected to the other end of the optical fiber, and the optical fiber are provided along the optical fiber. In an impact detection optical fiber sensor comprising a load concentration plate formed with a plurality of protrusions along the longitudinal direction to apply an impact load, the load concentration plate is a punch for punching in the longitudinal direction of the ribbon-shaped plate. A plurality of holes formed at a predetermined interval and a connection portion formed between the holes, and the upper surfaces of both end portions in the longitudinal direction of the connection portion are formed into a curved shape by a press , and the connection portion is An impact detection optical fiber sensor characterized in that the projection is formed. 上記接続部の長手方向両端部が、平面視鳩尾形状或いは平面視四角形状に形成された請求項１記載の衝撃検知光ファイバセンサ。   The impact detection optical fiber sensor according to claim 1, wherein both ends in the longitudinal direction of the connection portion are formed in a dovetail shape in a plan view or a quadrangular shape in a plan view. 光ファイバに沿って設けられ、その光ファイバに衝撃荷重を付与すべく長手方向に沿って複数の突起が形成される荷重集中板において、リボン状の板の長手方向に孔明用パンチで所定間隔を隔てて形成された複数の孔と、それら孔間に形成された接続部とを備え、上記接続部の長手方向両端部の上面がプレスにて曲面状に形成され、その接続部が上記突起をなすことを特徴とする荷重集中板。 In a load concentrating plate provided along an optical fiber and formed with a plurality of protrusions along the longitudinal direction so as to apply an impact load to the optical fiber , a predetermined interval is provided with a punch for punching in the longitudinal direction of the ribbon-shaped plate. A plurality of holes formed at intervals, and connection portions formed between the holes, and the upper surfaces of both end portions in the longitudinal direction of the connection portions are formed into a curved shape by a press , and the connection portions form the protrusions. A load concentrating plate characterized by 上記接続部の長手方向両端部が、平面視鳩尾形状或いは平面視四角形状に形成された請求項３記載の荷重集中板。   The load concentrating plate according to claim 3, wherein both end portions in the longitudinal direction of the connecting portion are formed in a dovetail shape in plan view or a quadrangular shape in plan view. 光ファイバに沿って設けられ、その光ファイバに衝撃荷重を付与すべく長手方向に沿って複数の突起が形成される荷重集中板の製造方法において、リボン状の板に、長手方向に所定間隔を隔てて複数の孔を形成し、それら孔間に形成された接続部の長手方向両端部をプレスにて曲面状に加工し、その接続部を上記突起とすることを特徴とする荷重集中板の製造方法。   In a method of manufacturing a load concentration plate provided along an optical fiber and having a plurality of protrusions formed along the longitudinal direction so as to apply an impact load to the optical fiber, the ribbon-like plate is spaced at a predetermined interval in the longitudinal direction. A load concentrating plate characterized in that a plurality of holes are formed at intervals, both ends in the longitudinal direction of the connecting portion formed between the holes are processed into a curved shape by a press, and the connecting portion is the protrusion. Production method. 上記複数の孔が略Ｉ字状であり、それら略Ｉ字状の孔間に形成された接続部が、その長手方向両端部に突出部を有し、その突出部の上面をプレスにて曲面状に加工する請求項５記載の荷重集中板の製造方法。   The plurality of holes are substantially I-shaped, and the connection part formed between the substantially I-shaped holes has protrusions at both ends in the longitudinal direction, and the upper surface of the protrusions is curved by pressing. The method for producing a load concentrating plate according to claim 5, which is processed into a shape. 上記突出部を曲面加工用パンチで押し拡げ、その上面を曲面状に形成すると共に、平面視鳩尾形状に形成する請求項６記載の荷重集中板の製造方法。   7. The method of manufacturing a load concentrating plate according to claim 6, wherein the protruding portion is expanded with a punch for curved surface processing, and the upper surface thereof is formed into a curved surface shape and formed into a dovetail shape in a plan view. 上記複数の孔が略四角形状であり、それら略四角形状の孔間に形成された接続部の長手方向両端部の上面をプレスにて曲面状に加工する請求項５記載の荷重集中板の製造方法。   6. The load concentrating plate according to claim 5, wherein the plurality of holes have a substantially quadrangular shape, and upper surfaces of both end portions in the longitudinal direction of the connecting portion formed between the substantially quadrangular holes are processed into a curved shape by a press. Method. 上記接続部の長手方向両端部を曲面加工用パンチで押しつぶして、上記リボン状の板を幅方向外側に押し拡げ、その後、そのリボン状の板の幅方向両端部を直線状に切断する請求項８記載の荷重集中板の製造方法。   The both ends in the longitudinal direction of the connecting portion are crushed with a punch for curved surface processing, the ribbon-like plate is squeezed outward in the width direction, and then the both ends in the width direction of the ribbon-like plate are cut linearly. 8. A method for producing a load concentrating plate according to 8.
JP2005063944A 2005-03-08 2005-03-08 Shock detecting optical fiber sensor, load concentrating plate and manufacturing method thereof Expired - Fee Related JP4568145B2 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04120347U (en) * 1991-04-12 1992-10-28 藤倉電線株式会社 fiber optic composite cable
JPH0634401A (en) * 1992-07-22 1994-02-08 Japan Aviation Electron Ind Ltd Structure for laying optical fiber for detecting topographic deformation
JPH08584A (en) * 1994-04-20 1996-01-09 Matsushita Electric Works Ltd Vital signal detection and vital signal detector
JPH1048071A (en) * 1996-07-31 1998-02-20 Toyota Autom Loom Works Ltd Caught in detector and glass-run and caught in preventing device
JP2003520956A (en) * 2000-01-21 2003-07-08 ストウ・ウッドワード，インコーポレイテッド Flexible optical fiber microbending device, sensor and method of use

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04120347U (en) * 1991-04-12 1992-10-28 藤倉電線株式会社 fiber optic composite cable
JPH0634401A (en) * 1992-07-22 1994-02-08 Japan Aviation Electron Ind Ltd Structure for laying optical fiber for detecting topographic deformation
JPH08584A (en) * 1994-04-20 1996-01-09 Matsushita Electric Works Ltd Vital signal detection and vital signal detector
JPH1048071A (en) * 1996-07-31 1998-02-20 Toyota Autom Loom Works Ltd Caught in detector and glass-run and caught in preventing device
JP2003520956A (en) * 2000-01-21 2003-07-08 ストウ・ウッドワード，インコーポレイテッド Flexible optical fiber microbending device, sensor and method of use

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