JP2017033648A - Protective cover structure of proximity sensor - Google Patents
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Abstract
Description
本発明は特に、近接センサーの検出領域内における金属異物の付着を効果的に回避することで、誤作動を大幅に低減可能であるとともに、構造が簡易で製造及び組み付けが容易な防護カバー構造を提供する。 In particular, the present invention effectively reduces the malfunction by effectively avoiding the adhesion of metallic foreign objects in the detection area of the proximity sensor, and has a protective cover structure that is simple in structure and easy to manufacture and assemble. provide.
現在、近接センサー（Ｐｒｏｘｉｍｉｔｙ Ｓｅｎｓｏｒ）は多くの自動機、半導体デバイス又は工作機械等に広く応用されている。近接センサーは、制御装置に検出物の数量情報や現在の機構の位置情報を取得させるべく、主として非接触方式で当該検出物が存在するか否かを検出する。図１を参照して、誘導型（Ｉｎｄｕｃｔｉｖｅ）の近接センサー１０は、内部ＬＣ及びトランジスタ回路を用いて発振することで、センサー先端の検出端１１における検出領域Ａに高周波電磁界を発生させる。そして、磁性金属（鉄やニッケル等）がコイル先端の平面に接近すると、誘導コイル内の磁気渦が変化して発振回路の出力電圧が変更される。この出力電圧の変化から、検出物の有無又は距離の遠近が検出される。当該誘導型近接センサー１０は電磁効果による検出が必須なため、検出可能な検出物は磁性を有する金属物体でなければならない。また、発振コイル周辺の磁力線範囲は周囲の物体から影響を受けることがあるため、当該誘導型近接センサー１０の近傍に他の磁性物や他の近接センサーがある場合には検出誤差が生じやすく、誤作動が起こってしまう。工作機械の場合には、工作機械が主として金属加工物を加工することから、加工過程で多くの金属屑が発生する。この金属屑は非常に容易に飛散して近接センサー１０先端の検出端１１における検出領域Ａ内に付着するため、当該近接センサー１０が検出誤差を生じ、誤作動が起こってしまう。 Currently, proximity sensors are widely applied to many automatic machines, semiconductor devices, machine tools, and the like. The proximity sensor detects whether or not the detected object exists mainly in a non-contact manner in order to cause the control device to acquire the quantity information of the detected object and the position information of the current mechanism. Referring to FIG. 1, an inductive proximity sensor 10 oscillates using an internal LC and a transistor circuit, thereby generating a high-frequency electromagnetic field in the detection region A at the detection end 11 at the sensor tip. When a magnetic metal (such as iron or nickel) approaches the plane of the coil tip, the magnetic vortex in the induction coil changes and the output voltage of the oscillation circuit is changed. From this change in output voltage, the presence or absence of a detection object or the distance is detected. Since the inductive proximity sensor 10 must be detected by the electromagnetic effect, the detectable object must be a metal object having magnetism. In addition, since the magnetic field lines around the oscillation coil may be affected by surrounding objects, detection errors are likely to occur when there are other magnetic materials or other proximity sensors in the vicinity of the inductive proximity sensor 10. A malfunction will occur. In the case of a machine tool, since the machine tool mainly processes a metal workpiece, a large amount of metal waste is generated in the processing process. Since the metal scraps are scattered very easily and adhere to the detection area A at the detection end 11 at the tip of the proximity sensor 10, the proximity sensor 10 causes a detection error and a malfunction occurs.
この点に鑑みて、発明者は長年従事してきた関連業界における研究開発及び製造経験に基づき、現在直面している課題を深く研究するとともに、長期にわたり研究及び試作に努力を重ねた結果、近接センサーの誤作動を効果的に回避可能であり、且つ構造が簡易で製造及び組み付けが容易な防護カバー構造を開発した。これが、即ち本発明における設計の主旨である。 In view of this point, the inventor researched the problems currently faced based on research and development and manufacturing experience in related industries, which has been engaged for many years. We have developed a protective cover structure that can effectively avoid the malfunction of the system and that is simple in structure and easy to manufacture and assemble. This is the gist of the design in the present invention.
本発明の第１の目的は、防護カバーが非磁性材料から成形製造され、当該防護カバーの第１端に、近接センサーの検出端外部に覆設されるとともに、当該防護カバーの外表面を当該近接センサーの非検出領域に位置させるための覆合部が設けられ、当該防護カバーの第２端には貫通した貫通延伸部が設けられ、当該貫通延伸部は、検出物を貫通させて近接センサーを検出により作動させるよう近接センサーの検出領域内に位置する、近接センサーの防護カバー構造を提供することである。これにより、当該防護カバーの貫通延伸部を利用して近接センサーを正常な検知により動作させられるだけでなく、当該防護カバーの外表面を利用して、金属異物が飛散して近接センサーの検出領域内に付着することを効果的に防止可能であるため、近接センサーの誤作動が大幅に低減される。 The first object of the present invention is to form a protective cover from a non-magnetic material, cover the first end of the protective cover outside the detection end of the proximity sensor, and cover the outer surface of the protective cover with the protective cover. A covering portion for positioning in the non-detection region of the proximity sensor is provided, and a penetrating extension portion penetrating the second end of the protective cover is provided. Proximity sensor protective cover structure located in the detection area of the proximity sensor to be actuated by detection. As a result, not only can the proximity sensor be operated by normal detection using the penetrating and extending portion of the protective cover, but also the outer surface of the protective cover can be used to scatter metal foreign objects and detect the proximity sensor detection area. Since it can be effectively prevented from adhering to the inside, malfunction of the proximity sensor is greatly reduced.
本発明の第２の目的は、防護カバーが非磁性材料から成形製造され、当該防護カバーの第１端に、近接センサーの検出端外部に覆設されるとともに、当該防護カバーの外表面を当該近接センサーの非検出領域に位置させるための覆合部が設けられ、当該防護カバーの第２端には貫通した貫通延伸部が設けられ、当該貫通延伸部は、検出物を貫通させて近接センサーを検出により作動させるよう近接センサーの検出領域内に位置する、近接センサーの防護カバー構造を提供することである。これにより、当該防護カバーは構造が簡易で製造が容易であるほか、近接センサーの検出端外部への組み付けが容易となり、実用的効果が得られる。 The second object of the present invention is that the protective cover is molded and manufactured from a non-magnetic material, is covered on the first end of the protective cover, outside the detection end of the proximity sensor, and the outer surface of the protective cover is A covering portion for positioning in the non-detection region of the proximity sensor is provided, and a penetrating extension portion penetrating the second end of the protective cover is provided. Proximity sensor protective cover structure located in the detection area of the proximity sensor to be actuated by detection. As a result, the protective cover has a simple structure and is easy to manufacture, and can be easily assembled to the outside of the detection end of the proximity sensor, so that a practical effect can be obtained.
本発明について更に審査官の理解を促すべく、好ましい実施例を挙げるとともに図面を組み合わせ、以下に詳細に述べる。 In order to further promote the understanding of the examiner, the present invention will be described in detail below with reference to preferred embodiments and drawings.
図２、図３、図４を参照して、本発明の防護カバー２０は非磁性材料から成形製造される。本実施例において、当該防護カバー２０はプラスチック材料又はゴム材料を用いた射出成形により製造されるため、当該防護カバー２０の製造が容易となっている。当該防護カバー２０の第１端には、近接センサー３０の検出端３１外部に覆設されて、当該防護カバー２０の外表面２１を近接センサー３０の検出領域Ｂ以外の領域（非検出領域）に位置させるための覆合部２２が設けられている。本実施例において、当該覆合部２２は内側へ凹孔状とされる。当該覆合部２２は近接センサー３０の検出端３１の外部寸法に対応しており、緊合するよう押し込まれる形で近接センサー３０の検出端３１外部に固定覆設される。これにより、当該防護カバー２０が近接センサー３０の検出端３１の外部に容易に組み付けられる。また、当該防護カバー２０の第２端には貫通した貫通延伸部２３が設けられている。当該貫通延伸部２３は、検出物を貫通させて当該近接センサー３０の検出端３１を正常な検出により作動させるよう、近接センサー３０の検出領域Ｂ内に位置する。本実施例では、当該貫通延伸部２３は切欠き溝状とされる。当該貫通延伸部２３の幅は、検出物の貫通寸法に対応し、且つ当該貫通延伸部２３と検出物との間に小さな隙間が維持される範囲とされる。本発明の防護カバー２０は構造が簡易なだけでなく、近接センサー３０における検出端３１の外部に組み付けられると、貫通延伸部２３が近接センサー３０の検出領域Ｂに位置するほか、当該防護カバー２０の外表面２１全体が近接センサー３０の非検出領域に位置する。更に、当該防護カバー２０の外表面２１を用いて、金属異物が飛散して近接センサー３０の検出領域Ｂ内に付着することを効果的に防止可能なため、近接センサー３０の誤作動が大幅に低減される。 With reference to FIGS. 2, 3, and 4, the protective cover 20 of the present invention is molded and manufactured from a non-magnetic material. In the present embodiment, since the protective cover 20 is manufactured by injection molding using a plastic material or a rubber material, the protective cover 20 is easily manufactured. The first end of the protective cover 20 is covered outside the detection end 31 of the proximity sensor 30, and the outer surface 21 of the protective cover 20 is placed in a region other than the detection region B (non-detection region) of the proximity sensor 30. A covering portion 22 is provided for positioning. In the present embodiment, the covering portion 22 has a concave shape inward. The covering portion 22 corresponds to the external dimension of the detection end 31 of the proximity sensor 30, and is fixedly covered outside the detection end 31 of the proximity sensor 30 so as to be pushed into engagement. Thereby, the protective cover 20 is easily assembled outside the detection end 31 of the proximity sensor 30. In addition, a penetrating extending portion 23 is provided at the second end of the protective cover 20. The penetration extending portion 23 is located in the detection region B of the proximity sensor 30 so as to penetrate the detection object and operate the detection end 31 of the proximity sensor 30 by normal detection. In the present embodiment, the through extension 23 is formed in a notch groove shape. The width of the penetrating extension 23 corresponds to the penetrating dimension of the detected object and is a range in which a small gap is maintained between the penetrating extension 23 and the detected object. The protective cover 20 of the present invention is not only simple in structure, but when assembled to the outside of the detection end 31 of the proximity sensor 30, the penetrating extension 23 is positioned in the detection region B of the proximity sensor 30, and the protective cover 20 The entire outer surface 21 is located in the non-detection region of the proximity sensor 30. Furthermore, since the outer surface 21 of the protective cover 20 can be used to effectively prevent metallic foreign matter from scattering and adhering to the detection region B of the proximity sensor 30, malfunction of the proximity sensor 30 is greatly reduced. Reduced.
図５−１を参照して、本実施例の検出物４０は回転しながら近接センサー３０の検出領域Ｂに進入する。当該検出物４０は金属磁性材料であり、回転ホイール４１の外縁に取り付けられている。いうまでもなく、当該検出物４０と当該回転ホイール４１は、当該検出物４０が回転ホイール４１の外縁から直接突状に延伸するよう一体成形されていてもよい。回転ホイール４１が検出物４０を近接センサー３０の検出領域Ｂに進入させるよう回転していない場合には、検出領域Ｂが元々有する電磁効果は変化しないため、当該近接センサー３０が検出により作動することはない。図５−２を参照して、回転ホイール４１が回転して検出物４０を防護カバー２０の貫通延伸部２３から近接センサー３０の検出領域Ｂに進入させると、当該検出物４０は検出領域Ｂが元々有する電磁効果を変化させる。よって、当該近接センサー３０は検出により作動し、制御装置に検出信号を出力する。図５−３を参照して、回転ホイール４１が回転して検出物４０が防護カバー２０の貫通延伸部２３から近接センサー３０の検出領域Ｂを離脱すると、検出領域Ｂは元々有する電磁効果を回復する。よって、当該近接センサー３０は作動を停止して、制御装置への検出信号の出力を停止する。本発明の防護カバー２０は、近接センサー３０を正常な検出により作動させるべく、貫通延伸部２３によって検出物４０を回転させつつ近接センサー３０の検出領域Ｂに貫入可能なだけでなく、防護カバー２０の外表面２１全体が近接センサー３０の非検出領域に位置している。よって、当該防護カバー２０の外表面２１を用いて近接センサー３０の検出領域Ｂに対し防護カバーを形成可能であり、金属異物が飛散して近接センサー３０の検出領域Ｂ内に付着することが効果的に防止できるので、近接センサー３０の誤作動が大幅に低減される。 With reference to FIG. 5A, the detection object 40 of this embodiment enters the detection region B of the proximity sensor 30 while rotating. The detected object 40 is a metal magnetic material and is attached to the outer edge of the rotating wheel 41. Needless to say, the detected object 40 and the rotating wheel 41 may be integrally formed so that the detected object 40 extends directly from the outer edge of the rotating wheel 41 in a protruding manner. When the rotating wheel 41 is not rotated so as to cause the detection object 40 to enter the detection region B of the proximity sensor 30, the electromagnetic effect inherent in the detection region B does not change, and therefore the proximity sensor 30 is activated by detection. There is no. Referring to FIG. 5B, when the rotating wheel 41 rotates to cause the detection object 40 to enter the detection area B of the proximity sensor 30 from the penetrating extension 23 of the protective cover 20, the detection object 40 is detected in the detection area B. Change the electromagnetic effect originally possessed. Therefore, the proximity sensor 30 is activated by detection and outputs a detection signal to the control device. Referring to FIG. 5-3, when the rotating wheel 41 rotates and the detected object 40 leaves the detection area B of the proximity sensor 30 from the penetrating extension 23 of the protective cover 20, the detection area B recovers the electromagnetic effect originally possessed. To do. Therefore, the proximity sensor 30 stops its operation and stops outputting the detection signal to the control device. The protective cover 20 of the present invention is not only capable of penetrating into the detection region B of the proximity sensor 30 while rotating the detection object 40 by the penetrating extension 23 so that the proximity sensor 30 can be operated by normal detection. The entire outer surface 21 is located in the non-detection region of the proximity sensor 30. Therefore, it is possible to form a protective cover for the detection area B of the proximity sensor 30 using the outer surface 21 of the protective cover 20, and it is effective that metal foreign matter scatters and adheres to the detection area B of the proximity sensor 30. Therefore, the malfunction of the proximity sensor 30 is greatly reduced.
図６−１を参照して、本実施例の検出物５０は直線移動しながら近接センサー３０の検出領域Ｂに進入する。当該検出物５０は金属磁性材料であり、平行移動台５１の上方に取り付けられている。平行移動台５１が検出物５０を近接センサー３０の検出領域Ｂに進入させるよう平行移動していない場合には、検出領域Ｂが元々有する電磁効果は変化しないため、当該近接センサー３０が検出により作動することはない。図６−２を参照して、平行移動台５１が平行移動して検出物５０を防護カバー２０の貫通延伸部２３から近接センサー３０の検出領域Ｂに進入させると、当該検出物５０は検出領域Ｂが元々有する電磁効果を変化させる。よって、当該近接センサー３０は検出により作動し、制御装置に検出信号を出力する。図６−３を参照して、平行移動台５１が平行移動して検出物５０が防護カバー２０の貫通延伸部２３から近接センサー３０の検出領域Ｂを離脱すると、検出領域Ｂは元々有する電磁効果を回復する。よって、当該近接センサー３０は作動を停止して、制御装置への検出信号の出力を停止する。同様に、本発明の防護カバー２０は、近接センサー３０を正常な検出により作動させるべく、貫通延伸部２３によって検出物５０を平行移動させつつ近接センサー３０の検出領域Ｂに貫入可能なだけでなく、防護カバー２０の外表面２１全体が近接センサー３０の非検出領域に位置している。よって、当該防護カバー２０の外表面２１を用いて近接センサー３０の検出領域Ｂに対し防護カバーを形成可能であり、金属異物が飛散して近接センサー３０の検出領域Ｂ内に付着することが効果的に防止できるため、近接センサー３０の誤作動が大幅に低減される。 With reference to FIG. 6A, the detected object 50 of this embodiment enters the detection area B of the proximity sensor 30 while moving linearly. The detected object 50 is a metal magnetic material and is attached above the parallel moving table 51. When the translation table 51 is not translated so as to cause the detection object 50 to enter the detection area B of the proximity sensor 30, the electromagnetic effect inherent in the detection area B does not change, so that the proximity sensor 30 is activated by detection. Never do. Referring to FIG. 6B, when the translation table 51 moves in parallel and causes the detection object 50 to enter the detection area B of the proximity sensor 30 from the penetration extending portion 23 of the protective cover 20, the detection object 50 is detected in the detection area. The electromagnetic effect that B originally has is changed. Therefore, the proximity sensor 30 is activated by detection and outputs a detection signal to the control device. Referring to FIG. 6-3, when the translation table 51 moves in parallel and the detected object 50 leaves the detection area B of the proximity sensor 30 from the penetrating extension 23 of the protective cover 20, the detection area B originally has an electromagnetic effect. To recover. Therefore, the proximity sensor 30 stops its operation and stops outputting the detection signal to the control device. Similarly, the protective cover 20 of the present invention is not only capable of penetrating the detection area B of the proximity sensor 30 while translating the detection object 50 by the penetrating extension 23 so that the proximity sensor 30 can be operated by normal detection. The entire outer surface 21 of the protective cover 20 is located in the non-detection region of the proximity sensor 30. Therefore, it is possible to form a protective cover for the detection area B of the proximity sensor 30 using the outer surface 21 of the protective cover 20, and it is effective that metal foreign matter scatters and adheres to the detection area B of the proximity sensor 30. Therefore, the malfunction of the proximity sensor 30 is greatly reduced.
以上より、本発明の防護カバーは、金属異物が飛散して近接センサーの検出領域内に付着することを外表面により効果的に防止可能なため、近接センサーの誤作動が大幅に低減されるだけでなく、構造が簡易であり製造と組み付けが容易である。よって、実用的且つ進歩的設計を十分に備えるとともに、同様の製品及び刊行物による開示はこれまでに存在しない。従って、発明特許出願の要件を十分に満たしており、法に基づき出願する。 From the above, the protective cover of the present invention can more effectively prevent the foreign object from scattering and adhering to the detection area of the proximity sensor, so that the malfunction of the proximity sensor is greatly reduced. In addition, the structure is simple and manufacture and assembly are easy. Thus, it is well equipped with practical and progressive design, and no similar product and publication disclosures have ever existed. Therefore, the requirements of the invention patent application are sufficiently satisfied, and the application is filed based on the law.
１０ 近接センサー
１１ 検出端
Ａ 検出領域
２０ 防護カバー
２１ 外表面
２２ 覆合部
２３ 貫通延伸部
３０ 近接センサー
３１ 検出端
Ｂ 検出領域
４０ 検出物
４１ 回転ホイール
５０ 検出物
５１ 平行移動台
DESCRIPTION OF SYMBOLS 10 Proximity sensor 11 Detection end A Detection area 20 Protective cover 21 Outer surface 22 Covering part 23 Penetration extension part 30 Proximity sensor 31 Detection end B Detection area 40 Detection object 41 Rotating wheel 50 Detection object 51 Parallel moving stand
Claims (5)
当該防護カバーの第１端に設けられて、近接センサーの検出端外部に覆設されるとともに、当該防護カバーの外表面を当該近接センサーの非検出領域に位置させるための覆合部、
当該防護カバーの第２端に貫設されるとともに、検出物を貫通させて当該近接センサーの検出端を検出により作動させるよう、当該近接センサーの検出領域内に位置する貫通延伸部、を含む構造。 A protective cover structure for a proximity sensor, the protective cover being molded and manufactured from a non-magnetic material,
A covering portion that is provided at the first end of the protective cover and covers the outside of the detection end of the proximity sensor, and for positioning the outer surface of the protective cover in the non-detection region of the proximity sensor;
A structure including a penetrating extension portion that is provided in the second end of the protective cover and is located in the detection region of the proximity sensor so that the detection object is penetrated and the detection end of the proximity sensor is activated by detection. .
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015149453A JP6176293B2 (en) | 2015-07-29 | 2015-07-29 | Proximity sensor protective cover structure |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5853338U (en) * | 1981-09-29 | 1983-04-11 | 株式会社富士鉄工所 | Cylindrical proximity switch |
| JPS58154543U (en) * | 1982-04-09 | 1983-10-15 | 株式会社山武 | proximity switch |
| JPS61169929U (en) * | 1985-04-12 | 1986-10-21 | ||
| JPH09171750A (en) * | 1996-11-21 | 1997-06-30 | Omron Corp | Steel ball detecting switch |
| JPH11317139A (en) * | 1998-04-30 | 1999-11-16 | Murata Mfg Co Ltd | Steel ball detection sensor |
| JP2999913B2 (en) * | 1993-12-16 | 2000-01-17 | 株式会社クボタ | Fluid flow velocity measuring device |
| JP2010216863A (en) * | 2009-03-13 | 2010-09-30 | Yamatake Corp | Proximity sensor |
-
2015
- 2015-07-29 JP JP2015149453A patent/JP6176293B2/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5853338U (en) * | 1981-09-29 | 1983-04-11 | 株式会社富士鉄工所 | Cylindrical proximity switch |
| JPS58154543U (en) * | 1982-04-09 | 1983-10-15 | 株式会社山武 | proximity switch |
| JPS61169929U (en) * | 1985-04-12 | 1986-10-21 | ||
| JP2999913B2 (en) * | 1993-12-16 | 2000-01-17 | 株式会社クボタ | Fluid flow velocity measuring device |
| JPH09171750A (en) * | 1996-11-21 | 1997-06-30 | Omron Corp | Steel ball detecting switch |
| JPH11317139A (en) * | 1998-04-30 | 1999-11-16 | Murata Mfg Co Ltd | Steel ball detection sensor |
| JP2010216863A (en) * | 2009-03-13 | 2010-09-30 | Yamatake Corp | Proximity sensor |
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| JP6176293B2 (en) | 2017-08-09 |
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