JP2020066032A - Structure for mounting laser light detection sensor to protective window for machine tool and laser light detection sensor mounting spacer - Google Patents

Structure for mounting laser light detection sensor to protective window for machine tool and laser light detection sensor mounting spacer Download PDF

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JP2020066032A
JP2020066032A JP2018201111A JP2018201111A JP2020066032A JP 2020066032 A JP2020066032 A JP 2020066032A JP 2018201111 A JP2018201111 A JP 2018201111A JP 2018201111 A JP2018201111 A JP 2018201111A JP 2020066032 A JP2020066032 A JP 2020066032A
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detection sensor
laser light
light detection
protective window
spacer
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JP7146570B2 (en
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芳雄 中務
Yoshio Nakamu
芳雄 中務
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Okuma Corp
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Okuma Machinery Works Ltd
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Abstract

To make it possible that the operation of a laser light detection sensor can be checked with an operation check sensor attached to a protective window even if the protective window has no test light propagation space inside.SOLUTION: Provided is a structure for mounting a laser light detection sensor 1, which comprises an operation check tester 10 having a light emission portion 11 for test light, onto a protective window 20 on a cover of a machine tool, in which a spacer 6 is interposed between the protective window 20 and the laser light detection sensor 1. Inside the spacer 6 is formed a propagation space S which allows test light L from the light emission portion 11 of the operation check tester 10 to reach a light-receiving portion 2 of the laser light detection sensor 1 when the spacer is between the protective window 20 and the laser light detection sensor 1.SELECTED DRAWING: Figure 1

Description

本発明は、レーザ加工が可能な工作機械において、カバーに設けられる保護窓にレーザ光検知センサを取り付ける構造及びレーザ光検知センサ取付用スペーサに関する。   The present invention relates to a structure for mounting a laser light detection sensor on a protective window provided in a cover and a laser light detection sensor mounting spacer in a machine tool capable of laser processing.

レーザ加工ユニット等を備えて金属積層や焼入れ等のレーザ加工が可能な工作機械（例えば特許文献１参照）では、工作機械からのレーザ光の漏洩を検知するレーザ光検知センサが設けられる。このレーザ光検知センサの取付構造の一例を図３に示す。ここでは所定の空間を隔てた２枚の板金３１Ａ，３１Ｂからなるカバー３０の外側に、レーザ光検知センサ１をボルト３で固定し、レーザ光検知センサ１の中央に設けた受光部２を外側の板金３１Ｂを貫通させて空間内に突出させている。
このレーザ光検知センサ１には、正常に動作しているか否かを確認するために、動作確認テスタ１０が設けられている。この動作確認テスタ１０は、レーザ光検知センサ１を外側から貫通して保持されて、テスト光の発光部１１を外側の板金３１Ｂ越しにカバー３０内の空間に臨ませた状態で取り付けられる。よって、図示しないテストボタンの操作により発光部１１から照射されたテスト光Ｌは、矢印に示すようにカバー３０内で反射を繰り返し、その反射光Ｌ’が受光部２に到達するため、レーザ光検知センサ１の動作確認を行うことができる。 2. Description of the Related Art In a machine tool that includes a laser processing unit or the like and can perform laser processing such as metal lamination and hardening (see, for example, Patent Document 1), a laser light detection sensor that detects leakage of laser light from the machine tool is provided. An example of the mounting structure of this laser light detection sensor is shown in FIG. Here, the laser light detection sensor 1 is fixed to the outside of a cover 30 composed of two metal plates 31A and 31B that are separated by a predetermined space with a bolt 3, and the light receiving portion 2 provided in the center of the laser light detection sensor 1 is outside. The metal plate 31B of No. 3 is penetrated to project into the space.
The laser light detection sensor 1 is provided with an operation confirmation tester 10 in order to confirm whether or not it is operating normally. The operation check tester 10 is held while penetrating the laser light detection sensor 1 from the outside, and is attached in a state where the light emitting portion 11 of the test light is exposed to the space inside the cover 30 through the outer metal plate 31B. Therefore, the test light L emitted from the light emitting unit 11 by the operation of the test button (not shown) is repeatedly reflected in the cover 30 as indicated by the arrow, and the reflected light L ′ reaches the light receiving unit 2, so that the laser light is emitted. The operation of the detection sensor 1 can be confirmed.

特開２０１８−７９５４０号公報JP, 2018-79540, A

一方、図４に示すように、レーザ光検知センサ１が、半透明のアクリル板等からなる前後２枚の保護層２１Ａ，２１Ｂと、両保護層２１Ａ，２１Ｂ間に挟まれて透明なアクリル板等からなる中間層２２とからなる３層構造の保護窓２０にボルト３で取り付けられる場合、ここでは受光部２の位置を内側の保護層２１Ａに合わせるために、外側の保護層２１Ｂとレーザ光検知センサ１との間に板状のスペーサ４が介在され、内側の保護層２１Ａの内側には、ボルト３をねじ込むための取付板５が設けられる。
この取付構造の場合、図５に示すようにボルト３の位置に動作確認テスタ１０を取り付けても、保護窓２０内には発光部１１からのテスト光Ｌが反射して受光部２まで伝播する空間がないため、レーザ光検知センサ１の動作確認を行うことができなくなってしまう。 On the other hand, as shown in FIG. 4, the laser light detection sensor 1 includes two front and rear protective layers 21A and 21B made of a semitransparent acrylic plate and a transparent acrylic plate sandwiched between the protective layers 21A and 21B. When the bolt 3 is attached to the protective window 20 having a three-layer structure including the intermediate layer 22 made of, for example, the outer protective layer 21B and the laser light are aligned in order to align the position of the light receiving portion 2 with the inner protective layer 21A. A plate-shaped spacer 4 is interposed between the sensor 1 and the detection sensor 1, and a mounting plate 5 for screwing the bolt 3 is provided inside the inner protective layer 21A.
In the case of this mounting structure, even if the operation confirmation tester 10 is mounted at the position of the bolt 3 as shown in FIG. 5, the test light L from the light emitting portion 11 is reflected in the protective window 20 and propagates to the light receiving portion 2. Since there is no space, it becomes impossible to confirm the operation of the laser light detection sensor 1.

そこで、本発明は、内部にテスト光の伝播空間がない保護窓であっても動作確認テスタを取り付けてレーザ光検知センサの動作確認を行うことができる工作機械における保護窓へのレーザ光検知センサの取付構造及び取付用スペーサを提供することを目的としたものである。   In view of this, the present invention provides a laser light detection sensor for a protective window in a machine tool, which is capable of confirming the operation of the laser light detection sensor by attaching an operation confirmation tester even if the protection window does not have a test light propagation space inside. The purpose of the present invention is to provide a mounting structure and a mounting spacer.

上記目的を達成するために、請求項１に記載の発明は、工作機械のカバーに設けた保護窓に、テスト光の発光部を有する動作確認テスタを設けたレーザ光検知センサを取り付けるための構造であって、
前記保護窓と前記レーザ光検知センサとの間にスペーサを介在させると共に、前記スペーサの内部に、当該介在状態で前記動作確認テスタの前記発光部からのテスト光が前記レーザ光検知センサの受光部に到達可能な伝播空間を形成していることを特徴とする。
請求項２に記載の発明は、請求項１の構成において、前記スペーサは、前記介在状態で前記発光部と前記受光部とを囲んで前記伝播空間を形成する枠体であることを特徴とする。
請求項３に記載の発明は、請求項２の構成において、前記スペーサの内側には、前記保護窓へ前記レーザ光検知センサを取り付けるためのボルトの貫通部が複数形成され、前記発光部は前記ボルトに代えて何れかの前記貫通部に合わせて配置されることを特徴とする。
上記目的を達成するために、請求項４に記載の発明は、工作機械のカバーに設けた保護窓に、テスト光の発光部を有する動作確認テスタを設けたレーザ光検知センサを取り付けるために、前記保護窓と前記レーザ光検知センサと間に介在されるレーザ光検知センサ取付用スペーサであって、
当該介在状態で前記動作確認テスタの前記発光部からのテスト光が前記レーザ光検知センサの受光部に到達可能な伝播空間を内部に備えていることを特徴とする。 In order to achieve the above object, the invention according to claim 1 is a structure for mounting a laser light detection sensor provided with an operation confirmation tester having a test light emitting section on a protective window provided on a cover of a machine tool. And
A spacer is interposed between the protective window and the laser light detection sensor, and the test light from the light emitting portion of the operation check tester is received inside the spacer in the light receiving portion of the laser light detection sensor. It is characterized by forming a propagation space that can reach.
According to a second aspect of the present invention, in the configuration of the first aspect, the spacer is a frame body that surrounds the light emitting unit and the light receiving unit to form the propagation space in the interposed state. .
According to a third aspect of the present invention, in the configuration of the second aspect, a plurality of bolt penetrating portions for attaching the laser light detection sensor to the protective window are formed inside the spacer, and the light emitting portion is the light emitting portion. It is characterized in that it is arranged in accordance with any one of the through portions instead of the bolt.
In order to achieve the above object, the invention according to claim 4 is to attach a laser light detection sensor provided with an operation confirmation tester having a test light emitting section to a protective window provided on a cover of a machine tool, A spacer for mounting a laser light detection sensor interposed between the protective window and the laser light detection sensor,
In the intervening state, the test light from the light emitting portion of the operation check tester is provided internally with a propagation space capable of reaching the light receiving portion of the laser light detection sensor.

本発明によれば、動作確認テスタの発光部からのテスト光がレーザ光検知センサの受光部に到達可能な伝播空間を内部に形成するスペーサの採用により、内部にテスト光の伝播空間がない保護窓であっても動作確認テスタを取り付けてレーザ光検知センサの動作確認を行うことができる。   According to the present invention, by adopting a spacer that internally forms a propagation space through which the test light from the light emitting portion of the operation check tester can reach the light receiving portion of the laser light detection sensor, there is no test light propagation space inside. Even with a window, an operation check tester can be attached to check the operation of the laser light detection sensor.

保護窓にレーザ光検知センサを取り付けた構造を示す説明図である。It is explanatory drawing which shows the structure which attached the laser beam detection sensor to the protective window. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 従来のカバーにレーザ光検知センサを取り付けた構造を示す説明図である。It is explanatory drawing which shows the structure which attached the laser beam detection sensor to the conventional cover. 保護窓にレーザ光検知センサを取り付けた構造を示す説明図である。It is explanatory drawing which shows the structure which attached the laser beam detection sensor to the protective window. 図４のレーザ光検知センサに動作確認テスタを取り付けた状態の説明図である。It is explanatory drawing of the state which attached the operation confirmation tester to the laser beam detection sensor of FIG.

以下、本発明の実施の形態を図面に基づいて説明する。
図１は、図４に示した保護窓２０へレーザ光検知センサ１を取り付けた構造の一例を示す説明図で、保護窓２０及びレーザ光検知センサ１等の構成は図４，５と同じであるため、同じ構成部には同じ符号を付して重複する説明を省略する。
ここでは外側の保護層２１Ｂとレーザ光検知センサ１との間に設けられるスペーサの構造が図４，５とは異なっている。このレーザ光検知センサ取付用スペーサとしてのスペーサ６は、図２に示すように、内側が中空となる横長矩形状の枠体で、内側の四隅には、４本のボルト３，３・・を位置決めして貫通させるための円形状の貫通部７，７・・が、内側の空間との連通状態で形成されている。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory view showing an example of a structure in which the laser light detection sensor 1 is attached to the protection window 20 shown in FIG. 4, and the configurations of the protection window 20, the laser light detection sensor 1 and the like are the same as those in FIGS. Therefore, the same components are designated by the same reference numerals, and duplicate description will be omitted.
Here, the structure of the spacer provided between the outer protective layer 21B and the laser light detection sensor 1 is different from that shown in FIGS. As shown in FIG. 2, the spacer 6 as the spacer for mounting the laser light detection sensor is a horizontally long rectangular frame body having a hollow inside, and four bolts 3, 3 ... Circular penetrating portions 7, 7 ... For positioning and penetrating are formed in a communication state with the inner space.

この取付構造においては、何れか１つの貫通部７の位置に、ボルト３に代えて動作確認テスタ１０を取り付けて、発光部１１を貫通部７に臨ませている。これによりスペーサ６内で発光部１１と受光部２とが連通し、スペーサ６内には、発光部１１からのテスト光Ｌが矢印で示すように反射を繰り返し、その反射光Ｌ’が受光部２に到達できる伝播空間Ｓが形成される。   In this mounting structure, an operation confirmation tester 10 is attached to the position of any one of the penetrating portions 7 in place of the bolt 3 so that the light emitting portion 11 faces the penetrating portion 7. As a result, the light emitting unit 11 and the light receiving unit 2 communicate with each other in the spacer 6, the test light L from the light emitting unit 11 is repeatedly reflected in the spacer 6 as indicated by an arrow, and the reflected light L ′ is the light receiving unit. A propagation space S that can reach 2 is formed.

このように、上記形態のレーザ光検知センサ１の取付構造及びスペーサ６によれば、スペーサ６の内部に、保護窓２０とレーザ光検知センサ１との間への介在状態で動作確認テスタ１０の発光部１１からのテスト光Ｌがレーザ光検知センサ１の受光部２に到達可能な伝播空間Ｓを形成しているので、内部にテスト光Ｌの伝播空間がない保護窓２０であっても動作確認テスタ１０を取り付けてレーザ光検知センサ１の動作確認を行うことができる。   As described above, according to the mounting structure of the laser light detection sensor 1 and the spacer 6 of the above-described embodiment, the operation check tester 10 is provided inside the spacer 6 with the protection window 20 and the laser light detection sensor 1 interposed therebetween. Since the test light L from the light emitting section 11 forms the propagation space S that can reach the light receiving section 2 of the laser light detection sensor 1, even the protective window 20 having no propagation space of the test light L inside operates. The operation of the laser light detection sensor 1 can be confirmed by attaching the confirmation tester 10.

特にここでは、スペーサ６を、保護窓２０とレーザ光検知センサ１との間への介在状態で発光部１１と受光部２とを囲んで伝播空間Ｓを形成する枠体としているので、スペーサ６の取付と共に伝播空間Ｓを簡単に形成することができる。
また、スペーサ６の内側には、保護窓２０へレーザ光検知センサ１を取り付けるためのボルト３の貫通部７が複数形成され、発光部１１はボルト３に代えて何れかの貫通部７に合わせて配置されるので、貫通部７を利用して発光部１１を容易に位置決め可能となる。 In particular, here, the spacer 6 is a frame member that surrounds the light emitting portion 11 and the light receiving portion 2 in a state of being interposed between the protective window 20 and the laser light detection sensor 1 to form the propagation space S, so that the spacer 6 is provided. It is possible to easily form the propagation space S together with the mounting.
Further, a plurality of penetrating portions 7 of the bolt 3 for attaching the laser light detection sensor 1 to the protective window 20 are formed inside the spacer 6, and the light emitting portion 11 is replaced with the penetrating portion 7 instead of the bolt 3. The light emitting portion 11 can be easily positioned by using the penetrating portion 7.

なお、スペーサに設けた貫通部への動作確認テスタの取り付け位置は上記形態に限らず、他の貫通部を利用してもよい。また、貫通部を利用せずに受光部と連通する位置へ動作確認テスタを取り付けることもできる。
スペーサの形状も、伝播空間は内側に広く取る形態に限らず、少なくとも動作確認テスタの発光部とレーザ光検知センサの受光部とを連通させる空間が内部に形成されていれば、伝播空間は上記形態より小さくしてもよい。また、スペーサの厚み方向に貫通する伝播空間でなく、片面に形成した凹部で発光部と受光部とを連通させる伝播空間を形成することもできる。スペーサの外形状も矩形状以外に円形状等の他の形状も採用できる。
さらに、保護窓の構造も上記形態に限らず、２層構造や４層構造等であっても本発明の取付構造及びスペーサの採用は可能である。 In addition, the mounting position of the operation confirmation tester to the through-hole provided on the spacer is not limited to the above-described form, and another through-hole may be used. Further, the operation confirmation tester can be attached to a position communicating with the light receiving section without using the penetrating section.
The shape of the spacer is not limited to the form in which the propagation space is wide inward, and if the space for communicating at least the light emitting portion of the operation check tester and the light receiving portion of the laser light detection sensor is formed inside, the propagation space is It may be smaller than the form. Further, instead of the propagation space penetrating in the thickness direction of the spacer, it is possible to form the propagation space for communicating the light emitting portion and the light receiving portion with a recess formed on one surface. As the outer shape of the spacer, other shapes such as a circular shape can be adopted in addition to the rectangular shape.
Further, the structure of the protective window is not limited to the above-mentioned form, and the mounting structure and the spacer of the present invention can be adopted even if it has a two-layer structure, a four-layer structure, or the like.

１・・レーザ光検知センサ、２・・受光部、３・・ボルト、６・・スペーサ、７・・貫通部、１０・・動作確認テスタ、１１・・発光部、２０・・保護窓、２１Ａ，２１Ｂ・・保護層、２２・・中間層、３０・・カバー、Ｌ・・テスト光、Ｌ’・・反射光、Ｓ・・伝播空間。   1 ... Laser light detection sensor, 2 ... Light receiving part, 3 ... Bolt, 6 ... Spacer, 7 ... Penetration part, 10 ... Operation check tester, 11 ... Light emitting part, 20 ... Protective window, 21A , 21B ... Protective layer, 22 ... Intermediate layer, 30 ... Cover, L ... Test light, L '... Reflected light, S ... Propagation space.

Claims (4)

工作機械のカバーに設けた保護窓に、テスト光の発光部を有する動作確認テスタを設けたレーザ光検知センサを取り付けるための構造であって、
前記保護窓と前記レーザ光検知センサとの間にスペーサを介在させると共に、前記スペーサの内部に、当該介在状態で前記動作確認テスタの前記発光部からのテスト光が前記レーザ光検知センサの受光部に到達可能な伝播空間を形成していることを特徴とする工作機械における保護窓へのレーザ光検知センサの取付構造。 A structure for attaching a laser light detection sensor provided with an operation confirmation tester having a test light emitting section to a protective window provided on a cover of a machine tool,
A spacer is interposed between the protective window and the laser light detection sensor, and the test light from the light emitting portion of the operation check tester is received inside the spacer in the light receiving portion of the laser light detection sensor. A structure for mounting a laser light detection sensor to a protective window in a machine tool, characterized in that it forms a propagation space that can reach to. 前記スペーサは、前記介在状態で前記発光部と前記受光部とを囲んで前記伝播空間を形成する枠体であることを特徴とする請求項１に記載の工作機械における保護窓へのレーザ光検知センサの取付構造。   The laser light detection to the protective window in the machine tool according to claim 1, wherein the spacer is a frame body that surrounds the light emitting portion and the light receiving portion in the interposing state to form the propagation space. Sensor mounting structure. 前記スペーサの内側には、前記保護窓へ前記レーザ光検知センサを取り付けるためのボルトの貫通部が複数形成され、前記発光部は前記ボルトに代えて何れかの前記貫通部に合わせて配置されることを特徴とする請求項２に記載の工作機械における保護窓へのレーザ光検知センサの取付構造。   Inside the spacer, a plurality of bolt penetrating portions for attaching the laser light detection sensor to the protective window are formed, and the light emitting portion is arranged in accordance with any of the penetrating portions instead of the bolts. The mounting structure of a laser light detection sensor to a protective window in a machine tool according to claim 2, wherein. 工作機械のカバーに設けた保護窓に、テスト光の発光部を有する動作確認テスタを設けたレーザ光検知センサを取り付けるために、前記保護窓と前記レーザ光検知センサと間に介在されるレーザ光検知センサ取付用スペーサであって、
当該介在状態で前記動作確認テスタの前記発光部からのテスト光が前記レーザ光検知センサの受光部に到達可能な伝播空間を内部に備えていることを特徴とする工作機械における保護窓へのレーザ光検知センサ取付用スペーサ。 A laser beam interposed between the protective window and the laser beam detecting sensor for attaching a laser beam detecting sensor having an operation confirmation tester having a test light emitting section to the protective window provided on the cover of the machine tool. A spacer for mounting a detection sensor,
A laser for a protective window in a machine tool, characterized in that a test light from the light emitting portion of the operation check tester in the intervening state is internally provided with a propagation space that can reach a light receiving portion of the laser light detection sensor. Spacer for mounting the light detection sensor.
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