JPH0240486Y2 - - Google Patents
Info
- Publication number
- JPH0240486Y2 JPH0240486Y2 JP1982186151U JP18615182U JPH0240486Y2 JP H0240486 Y2 JPH0240486 Y2 JP H0240486Y2 JP 1982186151 U JP1982186151 U JP 1982186151U JP 18615182 U JP18615182 U JP 18615182U JP H0240486 Y2 JPH0240486 Y2 JP H0240486Y2
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- cable
- housing
- position detection
- detection 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000002411 adverse Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は可動部分を有する位置検出装置、特に
悪環境下における検書装置内部への防水、防塵構
造の改良に関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a position detection device having a movable part, and particularly to an improvement in the waterproof and dustproof structure of the interior of the document inspection device under adverse environments.
背景技術とその問題点
可動部分を有する位置検出装置、例えばプラン
ジヤ型デイジタル・スケール等はごみ、油等が多
分に存在する悪環境下で使用されるようになつて
来ており、このような悪環境から検出装置内部を
保護するため、一般的にパツキング、シール材等
を用いて装置内部を密閉構造とする必要があるま
でに至つている。BACKGROUND TECHNOLOGY AND PROBLEMS Position detection devices with moving parts, such as plunger type digital scales, have come to be used in harsh environments where there is a lot of dirt, oil, etc. In order to protect the inside of the detection device from the environment, it has become necessary to make the inside of the device hermetically sealed using packing, sealing material, etc.
第１図は従来のプランジヤ型デイジタル・スケ
ールを示す。同図において、１は測定スピンド
ル、２は密閉筐体としたスリーブ、３は検出ヘツ
ド、４はスケール、５はストツパ、６はリード
線、７はエンドキヤツプ、８はケーブル、９及び
１０はシール材である。周知の如く測定スピンド
ル１は被測定対象の移動に応動してこれに取付け
られたスケール４を変位させ、検出ヘツド３によ
つてその変位に応じた信号を検出しリード線６及
びケーブル８を介して外部に取出すようになつて
いる。 FIG. 1 shows a conventional plunger type digital scale. In the figure, 1 is a measuring spindle, 2 is a sleeve with a sealed housing, 3 is a detection head, 4 is a scale, 5 is a stopper, 6 is a lead wire, 7 is an end cap, 8 is a cable, and 9 and 10 are seals. It is a material. As is well known, the measurement spindle 1 displaces the scale 4 attached to it in response to the movement of the object to be measured, and the detection head 3 detects a signal corresponding to the displacement and sends the signal via the lead wire 6 and cable 8. It is designed to be taken out to the outside.
而して前述した理由でスリーブ２のスピンドル
摺動部及びケーブル取出部はシール材９，１０に
より封止されスリーブ２の内部は密閉構造となつ
ているが、可動部分（スピンドル等）の移動によ
つてスリーブ２内の空隙部分の容積が変化するの
で、これに伴なつて内部の気圧変化を生じる。従
つてスリーブ２の内部の密閉度が低い場合には上
記の気圧変化によつてスリーブ２の内部と外部と
の空気の間で呼吸作用を生起し、外部のごみ、油
分、水分等がスリーブ２内に侵入する恐れがあ
る。 For the reasons mentioned above, the spindle sliding part and the cable take-out part of the sleeve 2 are sealed with sealants 9 and 10, and the inside of the sleeve 2 has a sealed structure. As a result, the volume of the void inside the sleeve 2 changes, which causes a change in the internal air pressure. Therefore, if the degree of sealing inside the sleeve 2 is low, the above-mentioned atmospheric pressure change will cause a breathing effect between the air inside the sleeve 2 and the outside, and external dust, oil, moisture, etc. will be absorbed into the sleeve 2. There is a risk of intrusion inside.
また上記密閉度が高い場合には可動部分の移動
性が悪化し好ましくない。 Moreover, if the degree of sealing is high, the mobility of the movable parts will deteriorate, which is not preferable.
考案の目的
本考案の目的はかかる従来技術の欠点を改良し
て、装置内部の密閉度を高くしても可動部分の移
動によるその気圧変化を最最小限に抑制すると共
に可動部分の移動性も損うことがないようにする
にある。Purpose of the invention The purpose of the present invention is to improve the drawbacks of the prior art, and to suppress changes in air pressure due to movement of moving parts to the minimum even if the degree of sealing inside the device is increased, and to improve the mobility of moving parts. The goal is to avoid any damage.
考案の概要
本考案はこのような目的を達成するため、信号
取出用ケーブル内に空気導通用パイプを設けたこ
とを特徴とする。Summary of the invention In order to achieve the above object, the present invention is characterized in that an air conduction pipe is provided within the signal extraction cable.
以下図面に示す実施例を参照して本考案を説明
すると、第２図において、１１は例えばナイロ
ン、テフロン、ポリエチレン等から成る１mm程度
の径の可撓性パイプで、ケーブル８の内部に設け
られており、その一端はスリーブ２内に開口して
いて、他端は位置検出装置の電気回路部分を収納
してあるケース１２内に開口している。 The present invention will be described below with reference to the embodiments shown in the drawings. In FIG. One end thereof opens into the sleeve 2, and the other end opens into the case 12 which houses the electric circuit portion of the position detection device.
このように構成すれば、前述したようにスピン
ドル１の移動によつてスリーブ２内に気圧変化が
起つてもパイプ１１が上記ケース内部と空気導通
しているので、その気圧変化は充分小さく抑制で
きる。上記ケース１２は通常ごみ、油分等の存在
しない環境の良い場所に配置されているので、前
記した位置検出装置の機構部自体は悪環境に置れ
ていても、ケース１２を介しての呼吸作用による
スリーブ２内へのごみ、油分等の侵入を防止でき
る。 With this configuration, even if a change in air pressure occurs inside the sleeve 2 due to the movement of the spindle 1 as described above, the pipe 11 is in air communication with the inside of the case, so the change in air pressure can be suppressed to a sufficiently small level. . Since the case 12 is usually placed in a place with a good environment free from dust, oil, etc., even if the mechanical part of the position detection device itself is placed in a bad environment, the breathing action through the case 12 will not be affected. It is possible to prevent dirt, oil, etc. from entering the sleeve 2 due to this.
また、スリーブ２は密閉性を高めてもスピンド
ル１の移動性が悪化することはない。 Furthermore, even if the sleeve 2 improves its sealing performance, the mobility of the spindle 1 will not deteriorate.
更にはスリーブ２内を適当な負圧減少の手段、
例えばポンプ等に連通させておき、内部の気体を
若干高めておく等の処置を施しておけば更に効果
的である。 Furthermore, means for reducing the negative pressure within the sleeve 2,
For example, it would be even more effective to communicate with a pump or the like and take measures such as slightly increasing the internal gas level.
なおパイプ１１の径はスリーブ２内の容積とそ
の変化率に応じて決めればよい。 Note that the diameter of the pipe 11 may be determined depending on the volume within the sleeve 2 and its rate of change.
考案の効果
以上説明したように本考案によれば、比較的簡
単な改造を施すだけで、位置検出装置の密閉性を
高めると共に可動部分の移動性を良好にすること
ができ、悪環境での使用が可能になる等実用上の
効果は多大である。Effects of the invention As explained above, according to the invention, by making relatively simple modifications, it is possible to improve the sealing performance of the position detection device and improve the mobility of the movable parts, making it possible to improve performance in adverse environments. The practical effects are great, such as making it possible to use it.
第１図は従来の位置検出装置の機構部の概略構
造図、第２図は本考案の一実施例の概略構造図で
ある。
１……スピンドル、２……スリーブ、８……ケ
ーブル、９，１０……シール材、１１……パイ
プ、１２……ケース。
FIG. 1 is a schematic structural diagram of a mechanism section of a conventional position detection device, and FIG. 2 is a schematic structural diagram of an embodiment of the present invention. 1...Spindle, 2...Sleeve, 8...Cable, 9, 10...Sealing material, 11...Pipe, 12...Case.
Claims (1)
応動する可動部分と、その可動部分の変位量を
検出する手段とを内蔵し、前記筐体内からケー
ブルにより外部に検出信号を取り出すようにし
た装置において、前記ケーブル内に、筐体内に
一端が開口する可撓性パイプが設けられている
ことを特徴とする位置検出装置。 (2) 前記パイプの他端が位置検出装置の電気回路
部分等を収納してあるケース内に開口されてい
ることを特徴とする実用新案登録請求の範囲第
１項記載の位置検出装置。[Claims for Utility Model Registration] (1) A movable part that responds to the movement of the object to be measured and means for detecting the amount of displacement of the movable part are built into a sealed housing, and a cable is connected from inside the housing. What is claimed is: 1. A position detection device for extracting a detection signal to the outside, characterized in that the cable is provided with a flexible pipe having one end opened inside the housing. (2) The position detecting device according to claim 1, wherein the other end of the pipe is opened in a case housing an electric circuit portion of the position detecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18615182U JPS5989206U (en) | 1982-12-09 | 1982-12-09 | position detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18615182U JPS5989206U (en) | 1982-12-09 | 1982-12-09 | position detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5989206U JPS5989206U (en) | 1984-06-16 |
| JPH0240486Y2 true JPH0240486Y2 (en) | 1990-10-29 |
Family
ID=30402150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18615182U Granted JPS5989206U (en) | 1982-12-09 | 1982-12-09 | position detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5989206U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0522812Y2 (en) * | 1987-12-28 | 1993-06-11 | ||
| EP3293496B1 (en) * | 2016-09-12 | 2018-11-21 | Dr. Johannes Heidenhain GmbH | Length measurement device and method of assembling the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5193250A (en) * | 1974-12-20 | 1976-08-16 | ||
| JPS554559A (en) * | 1978-06-27 | 1980-01-14 | Meisei Electric Co Ltd | Pressure sensor using crystal vibrator |
| JPS57147027A (en) * | 1981-03-06 | 1982-09-10 | Nippon Denso Co Ltd | Semiconductor pressure detector |
-
1982
- 1982-12-09 JP JP18615182U patent/JPS5989206U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5193250A (en) * | 1974-12-20 | 1976-08-16 | ||
| JPS554559A (en) * | 1978-06-27 | 1980-01-14 | Meisei Electric Co Ltd | Pressure sensor using crystal vibrator |
| JPS57147027A (en) * | 1981-03-06 | 1982-09-10 | Nippon Denso Co Ltd | Semiconductor pressure detector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5989206U (en) | 1984-06-16 |
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