JPS6173011A - Length measuring instrument having dew condensation prevented - Google Patents
Length measuring instrument having dew condensation preventedInfo
- Publication number
- JPS6173011A JPS6173011A JP19550584A JP19550584A JPS6173011A JP S6173011 A JPS6173011 A JP S6173011A JP 19550584 A JP19550584 A JP 19550584A JP 19550584 A JP19550584 A JP 19550584A JP S6173011 A JPS6173011 A JP S6173011A
- Authority
- JP
- Japan
- Prior art keywords
- housing
- hole
- length measuring
- air
- measuring device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005494 condensation Effects 0.000 title abstract description 4
- 238000009833 condensation Methods 0.000 title abstract description 4
- 238000007789 sealing Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 239000002173 cutting fluid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/34746—Linear encoders
- G01D5/34761—Protection devices, e.g. caps; Blowing devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の技術分野）
本発明は主に工作機械の様に切削液等が飛散している環
境において用いられる測長装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a length measuring device used mainly in an environment where cutting fluid or the like is scattered, such as in a machine tool.
（発明の背景）
この種の環境において用いられる測長装置としては、筐
体を完全に密閉し、プラノジャの移動により測長を行な
う、いわゆるグラ／ジャ型の密閉構造の測長装置があっ
たが、長年の使用により。(Background of the Invention) As a length measuring device used in this kind of environment, there is a so-called GL/JAR type closed structure length measuring device, which has a completely sealed housing and measures length by moving a planar jar. However, after many years of use.
切削液が内部に若干流入してしまうことがあった。A small amount of cutting fluid sometimes flowed inside.
この様な欠点を除くため、！体内に気体を供給し。In order to eliminate such shortcomings! Supply gas to the body.
内圧を高くする測長装置も考えられるが、筐体内への極
わずかな液体の浸入までは防止することが困難で、特に
水溶性の切削液などが浸入してしまつた場合、筐体内部
に結露が発生し測長に支障をきたすことがある。A length measuring device that increases the internal pressure can be considered, but it is difficult to prevent even the slightest amount of liquid from entering the housing.In particular, if water-soluble cutting fluid or the like does infiltrate, it may cause damage to the inside of the housing. Condensation may occur and interfere with length measurement.
（発明の目的）
本発明はこれらの欠点を解決し、各種液体が飛散してい
る環境においても安心して使用できる測長装置を得るこ
とを目的とする。(Objective of the Invention) An object of the present invention is to solve these drawbacks and provide a length measuring device that can be used safely even in an environment where various liquids are scattered.
（発明の概要）
本発明の測長装置は、基本的には密閉型の筐体を用い、
摺動部を通して筺体内へ導入された液体を、に体に設け
た２つの貫通孔と気体の流入、排出装置とによって強制
的に筐体外部へ排出するようにしたことを特徴とする。(Summary of the invention) The length measuring device of the present invention basically uses a sealed housing,
The liquid introduced into the housing through the sliding part is forcibly discharged to the outside of the housing by two through holes provided in the body and a gas inflow/discharge device.
（実施例）゛
第１図は本発明の第１実施例であって、密閉型の筺体１
の内部には直線的に目盛り（スケール）を配列したスケ
ール板２が固設されている。光電式のリニアエンコーダ
と例にとれば、スケール板２は透明なガラス板であって
、その上に一定間隔で黒線（目盛り）が形成されている
。スケール板２を挾むように目盛りの読取装置（検出器
）３が設けられており、スケール板２０目盛り配列方向
に摺動自在にスケール板２に案内されている。読取装置
３は目盛り面を挾んで一方に光源を、他方にイ／デック
ススケールと光電変換素子とを有している。読取装置３
は弾性ｉ４ａ、４ｂにてスケール板２０案内面に押圧さ
れる如く連結部材５に保持されており、連結部材５には
ブラフジャ６が固定されている。グラ／ジャ６は、を体
１から密閉部材としてのＯす／グアを介して一部突出せ
しめて設けられている。以上の構成は従来のグラ／ジャ
型光電式測長装置と陶じである。(Embodiment) Fig. 1 shows a first embodiment of the present invention, in which a closed type housing 1 is shown.
A scale plate 2 on which graduations (scales) are linearly arranged is fixedly installed inside. Taking the example of a photoelectric linear encoder, the scale plate 2 is a transparent glass plate, on which black lines (scales) are formed at regular intervals. A scale reading device (detector) 3 is provided so as to sandwich the scale plate 2, and is guided to the scale plate 2 so as to be slidable in the direction in which the scale plate 20 is arranged. The reading device 3 has a light source on one side of the scale surface, and an index scale and a photoelectric conversion element on the other side. Reading device 3
is held by the connecting member 5 so as to be pressed against the guide surface of the scale plate 20 by elasticity i4a, 4b, and a bluffer 6 is fixed to the connecting member 5. The glass/jar 6 is provided so as to partially protrude from the body 1 through the gas/gua serving as a sealing member. The above configuration is the same as that of a conventional Gra/ja type photoelectric length measuring device.
筺体１には、第１の貫通孔８と第２の貫通孔９が設けら
れている。第１の貫通孔８は筐体１０通常の使用状態に
おいて下面に設けられている。第２の貫通孔９には、空
気圧源１０からフィルタ１１、絞り弁１２を介して空気
が供給されている。The housing 1 is provided with a first through hole 8 and a second through hole 9. The first through hole 8 is provided on the lower surface of the housing 10 in a normal use state. Air is supplied to the second through hole 9 from an air pressure source 10 via a filter 11 and a throttle valve 12 .
すなわち、第１の貫通孔８は排気孔、第２の貫通孔９は
吸気孔となる。That is, the first through hole 8 becomes an exhaust hole, and the second through hole 9 becomes an intake hole.
このような構成であるから、第２の貫通孔９から筺体１
内部に供給された空気は、を体１内部を通って第１の貫
通孔８から排出される。With such a configuration, the housing 1 can be connected from the second through hole 9.
The air supplied inside passes through the inside of the body 1 and is discharged from the first through hole 8.
従って、グラ／ジャ６の出入りによりてグラ／ジャ６と
Ｏす／グアとの間から、グラ／ジャ６０表面に付着した
状態でに体１内に水分が入ったとしても、筺体１内部と
流れ、排出される空気と共に、この水分は一体ｌ外部へ
排出されることになる。従来の構造たと、一度筐体内部
に入った水分は外部に排出されないので、目盛り面のく
もりの原因となり信号の読取りを不可能にしたり、電気
系その他に悪影響を及はすことか避けられなかった０
また、第１の貫通孔８が筐体１の下面に設けられている
ので、グラ／ジャ６に付着した油が筺体１内部に導入さ
れても、第１の貫通孔８からすみやかに外部へ排出され
る。Therefore, even if moisture enters the body 1 from between the glass/jar 6 and the Osu/gua while adhering to the surface of the glass/jar 60 due to the coming and going of the glass/jar 6, the inside of the housing 1 Along with the flowing and exhausted air, this moisture is also exhausted to the outside. With the conventional structure, once the moisture gets inside the casing, it is not discharged to the outside, which inevitably causes the scale surface to become cloudy, making it impossible to read the signal, and negatively affecting the electrical system and other parts. Furthermore, since the first through hole 8 is provided on the bottom surface of the housing 1, even if oil adhering to the glass/jar 6 is introduced into the housing 1, it can be quickly removed from the first through hole 8. It is discharged to the outside.
なお９以上の実施例において、スク゛−ル板２としては
透明なカフス板上に黒線を形成した九′亀弐のものを用
いたが、このような光電式の代わりにＡ色
磁気式等代り検出方法を用いたものであっても同様に用
いることができる。また、第２の貫通孔の位置は、内部
構造によって必ずしも一義的には決まらないが、第１の
貫通孔の位置との関係で空気のよどみが無いように、筺
体１内部全体を空気が流通するようにできるたけ第１の
貫通孔と離れた位置に配設することが一般的には望まし
い。また。In the above 9 embodiments, the screen plate 2 was made of a black line formed on a transparent cuff plate, but instead of such a photoelectric type, an A-color magnetic type etc. was used. Even if an alternative detection method is used, it can be used in the same manner. Furthermore, although the position of the second through hole is not necessarily uniquely determined by the internal structure, air can be circulated throughout the inside of the housing 1 so that there is no stagnation of air in relation to the position of the first through hole. It is generally desirable to dispose it as far away from the first through hole as possible. Also.
空気供給装置１０，１１．１２は種々の変形が考えられ
２例えば絞９弁１２の代わりに減圧弁を用いても胸様で
ある。さらに空気の代わりに他の気体を用いても良い。The air supply device 10, 11, 12 can be modified in various ways. For example, the air supply device 10, 11, 12 can be chest-like even if a pressure reducing valve is used instead of the throttle valve 12. Furthermore, other gases may be used instead of air.
次に第２図によって本発明の第２実施例を説明する。な
お、第１図と同一の部材には同一の図番を付して説明は
省略する。第２図の実施例が第１図の実施例と異なる点
は、第１の貫通孔８と第２の貫通孔９とに各々逆止め弁
１３．１４が設けられている点である。Next, a second embodiment of the present invention will be explained with reference to FIG. It should be noted that the same members as in FIG. 1 are given the same figure numbers and their explanations will be omitted. The embodiment of FIG. 2 differs from the embodiment of FIG. 1 in that the first through hole 8 and the second through hole 9 are each provided with a check valve 13, 14.
測長装置はプランジャ６の出入りにより測長がなされて
いるため、稼動中はブラ／ンヤ６の筺体１内の容積変化
による筐体内圧変化が常に生じている。このため逆止め
弁の方向を第１の貫通孔８を排出に、第２の貫通孔９を
吸入に使用すべく選ぶことにより、空気は吸気孔（第２
の貫通孔９）から吸いこまれ、かつ排気孔（第１の貫通
孔８）から排気されるという自己流入、排出作用が生ま
れることになる。Since the length measuring device measures the length by moving the plunger 6 in and out, the pressure within the housing 1 of the brush 6 constantly changes due to volume changes within the housing 1 during operation. Therefore, by selecting the direction of the check valve so that the first through hole 8 is used for exhaust and the second through hole 9 is used for intake, air can be transferred to the intake hole (second
A self-inflow and discharge action is created in which the air is sucked in through the through hole 9) and exhausted through the exhaust hole (first through hole 8).
（発明の効果）
以上のように本発明によれば、筐体に気体を流入、排出
させることにより、内部結露を防止することができるば
かりでなく、排気孔を下部に設けているので、筐体内に
浸入してしまった液体を常時排出できるという効果があ
る。また排気孔を設けであるため、第１実施例のように
、外部から気体を供給しても、装置筐体の内圧はほとん
ど高まらず１強度的に筐体設計も容易となる。また内圧
が高まる場合はエアーシリンダのようにグラ／ジャを押
し出す力が生ずるため、測長装置のみならず、取付けら
れる工作機械へカが加わってしまい本来の精度が維持さ
れにくかったが１本発明によればそのような心配も無い
。(Effects of the Invention) As described above, according to the present invention, not only can internal condensation be prevented by allowing gas to flow into and exhaust the casing, but also the exhaust hole is provided at the bottom of the casing. It has the effect of constantly draining fluids that have entered the body. Further, since the exhaust hole is provided, even if gas is supplied from the outside as in the first embodiment, the internal pressure of the device casing hardly increases, and the casing design becomes easy in terms of strength. In addition, when the internal pressure increases, a force is generated that pushes out the glazer like an air cylinder, which applies force not only to the length measuring device but also to the machine tool to which it is attached, making it difficult to maintain the original accuracy. According to the report, there is no such concern.
第１図は本発明による測長装置の第１実施例の断面図、
第２図は本発明の第２実施例の断面図である０
（主要部分の符号の説明）
１・・・筺体、２・・・スケール板、３・・・読取装置
。
４ａ、４ｂ・・・弾性線、５・・・連結部材、６・・・
プラ／ンヤ、７・・・ＯＩＪ ／グ、８・・・第１の貫
通孔、９・・・第２の貫通孔、１０・・・空気圧源、１
１・・・フィルタ。
１２・・・絞り弁、１３．１４・・・逆止め弁。FIG. 1 is a sectional view of a first embodiment of a length measuring device according to the present invention;
FIG. 2 is a sectional view of a second embodiment of the present invention. 0 (Explanation of symbols of main parts) 1... Housing, 2... Scale plate, 3... Reading device. 4a, 4b...Elastic wire, 5...Connection member, 6...
7... OIJ/g, 8... First through hole, 9... Second through hole, 10... Air pressure source, 1
1... Filter. 12... Throttle valve, 13.14... Check valve.
Claims (3)
ケール板を前記筐体内部に固設すると共に、前記スケー
ルを読み取る検出器を設け、前記検出器を保持しかつ又
該検出器を前記スケールの配列方向に移動させるために
案内される移動部材を、前記筐体から密閉部材を介して
一部突出せしめた測長装置において、 第１の貫通孔を前記筐体の下面に設けると共に第２の貫
通孔を前記筐体の任意の位置に設け、前記筐体に気体が
流入しかつ排出されるように流入排出装置を設けたこと
を特徴とする測長装置。(1) A sealed casing, a scale plate on which scales are linearly arranged are fixedly installed inside the casing, a detector for reading the scale is provided, the detector is held, and the detector In the length measuring device, a moving member guided to move the scale in the direction in which the scales are arranged partially protrudes from the housing through a sealing member, and a first through hole is provided in the lower surface of the housing. A length measuring device characterized in that a second through hole is provided at an arbitrary position of the housing, and an inflow/discharge device is provided so that gas flows into and is discharged from the housing.
前記筐体内部に気体を流入せしめる空気供給装置である
ことを特徴とする特許請求の範囲第１項記載の測長装置
。(2) The length measuring device according to claim 1, wherein the inflow/discharge device is an air supply device that causes gas to flow into the housing through the second through hole.
体内部から排気可能な方向に取付けた第１の逆止め弁と
、前記第２の貫通孔に前記筐体内部へ吸気可能な方向に
取付けた第２の逆止め弁と、からなることを特徴とする
特許請求の範囲第１項記載の測長装置。(3) The inflow/discharge device includes a first check valve installed in the first through hole in a direction that allows air to be exhausted from inside the casing, and a second through hole that allows air to be sucked into the casing. 2. The length measuring device according to claim 1, further comprising a second check valve attached in the same direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19550584A JPS6173011A (en) | 1984-09-18 | 1984-09-18 | Length measuring instrument having dew condensation prevented |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19550584A JPS6173011A (en) | 1984-09-18 | 1984-09-18 | Length measuring instrument having dew condensation prevented |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6173011A true JPS6173011A (en) | 1986-04-15 |
Family
ID=16342196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19550584A Pending JPS6173011A (en) | 1984-09-18 | 1984-09-18 | Length measuring instrument having dew condensation prevented |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6173011A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63100314A (en) * | 1986-10-16 | 1988-05-02 | Toshiba Mach Co Ltd | Scale device |
| EP0297251A2 (en) * | 1987-07-03 | 1989-01-04 | Dr. Johannes Heidenhain GmbH | Encapsulated position measuring device |
| JPH01102811U (en) * | 1987-12-28 | 1989-07-11 | ||
| JPH02196923A (en) * | 1988-06-29 | 1990-08-03 | Dr Johannes Heidenhain Gmbh | Position measuring apparatus |
| JP2011058969A (en) * | 2009-09-10 | 2011-03-24 | Takaoka Electric Mfg Co Ltd | Heat insulating device for optical measuring instrument |
| CN102944199A (en) * | 2012-10-29 | 2013-02-27 | 昆山市力格自动化设备有限公司 | Fixture for detecting installation of rotation shaft of automobile compressor |
-
1984
- 1984-09-18 JP JP19550584A patent/JPS6173011A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63100314A (en) * | 1986-10-16 | 1988-05-02 | Toshiba Mach Co Ltd | Scale device |
| EP0297251A2 (en) * | 1987-07-03 | 1989-01-04 | Dr. Johannes Heidenhain GmbH | Encapsulated position measuring device |
| JPH01102811U (en) * | 1987-12-28 | 1989-07-11 | ||
| JPH0522812Y2 (en) * | 1987-12-28 | 1993-06-11 | ||
| JPH02196923A (en) * | 1988-06-29 | 1990-08-03 | Dr Johannes Heidenhain Gmbh | Position measuring apparatus |
| JP2011058969A (en) * | 2009-09-10 | 2011-03-24 | Takaoka Electric Mfg Co Ltd | Heat insulating device for optical measuring instrument |
| CN102944199A (en) * | 2012-10-29 | 2013-02-27 | 昆山市力格自动化设备有限公司 | Fixture for detecting installation of rotation shaft of automobile compressor |
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