JPH0325121Y2 - - Google Patents
Info
- Publication number
- JPH0325121Y2 JPH0325121Y2 JP1983093488U JP9348883U JPH0325121Y2 JP H0325121 Y2 JPH0325121 Y2 JP H0325121Y2 JP 1983093488 U JP1983093488 U JP 1983093488U JP 9348883 U JP9348883 U JP 9348883U JP H0325121 Y2 JPH0325121 Y2 JP H0325121Y2
- Authority
- JP
- Japan
- Prior art keywords
- rod
- cylindrical case
- detection sensor
- expansion
- electrical resistor
- 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 16
- 230000008602 contraction Effects 0.000 claims description 15
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 239000004020 conductor Substances 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000003971 tillage Methods 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
【考案の詳細な説明】
本考案は、例えば、農用トラクタに連結された
作業装置の作業姿勢をリフトロツドシリンダの伸
縮作動量から検出する場合などに使用されるセン
サーで、詳しくは、筒状ケースとこの筒状ケース
に対してその軸線方向にスライド伸縮移動自在に
片持ちで挿嵌保持されるロツドとを有し、前記筒
状ケースの内面に帯板状電気抵抗体が付設されて
いるとともに、前記ロツドには、前記電気抵抗体
の摺接位置変更により両者の伸縮量を電圧変化と
して検出させるための電気接点が設けられている
長さ検出用センサーに関する。[Detailed description of the invention] The present invention is a sensor that is used, for example, when detecting the working posture of a working device connected to an agricultural tractor from the amount of expansion and contraction of a lift rod cylinder. It has a case and a rod that is inserted and held in a cantilever manner so as to be able to slide and expand in the axial direction of the cylindrical case, and a strip-shaped electrical resistor is attached to the inner surface of the cylindrical case. The present invention also relates to a length detection sensor in which the rod is provided with an electric contact for detecting the amount of expansion and contraction of both as a voltage change by changing the sliding contact position of the electric resistor.
従来、この種の長さ検出用センサーとしては、
第５図に示すように、前記ロツド９をガタつきの
ない状態で移動案内するために、ロツド９を片持
ち支持する摺接案内部８ａを、ロツド９の伸縮移
動方向である程度の長さを確保した状態で筒状ケ
ース８に形成してあり、筒状ケース８において、
前記電気抵抗体１２をロツド９の伸縮移動方向の
適宜間隔を隔てた状態で配設されていた。 Conventionally, this type of length detection sensor is
As shown in FIG. 5, in order to guide the movement of the rod 9 without rattling, the sliding guide portion 8a that supports the rod 9 in a cantilevered manner must have a certain length in the direction of the telescopic movement of the rod 9. In the cylindrical case 8,
The electrical resistors 12 are arranged at appropriate intervals in the direction of the extension and contraction movement of the rod 9.
しかしながら、上記従来構造のものには次のよ
うな欠点があつた。 However, the conventional structure described above had the following drawbacks.
即ち、この種のセンサーにおいては、前記電気
抵抗体１２が長くなつても誤差は増大変化せず又
は変化するにしても極めて小さい関係上、この電
気抵抗体１２を極力長くして検出精度の向上を図
ることが重要であり、また、前記筒状ケース８の
摺接案内部８ａのロツド伸縮方向長さを極力長く
して、ロツド９をガタツキのない状態で確実、ス
ムーズに伸縮案内できるようにすることが要望さ
れている。 That is, in this type of sensor, even if the electrical resistor 12 becomes longer, the error does not increase or change, or even if it changes, it is extremely small, so the detection accuracy is improved by making the electrical resistor 12 as long as possible. It is important to ensure that the length of the sliding guide portion 8a of the cylindrical case 8 in the rod expansion/contraction direction is as long as possible so that the rod 9 can be reliably and smoothly expanded/contracted without wobbling. It is requested to do so.
従来のもので、上述のような二つの要望を満足
させようとすれば、前記筒状ケース８のロツド伸
縮方向での寸法が非常に長くせざるを得ず、よつ
てセンサーが大型化し易い欠点があつた。 In order to satisfy the above two demands with the conventional type, the dimension of the cylindrical case 8 in the direction of rod expansion and contraction has to be very long, which has the disadvantage that the sensor tends to be large. It was hot.
本考案は、上述の従来欠点を筒状ケースと電気
抵抗体との間での合理的な改造をもつて改善する
点に目的を有する。 An object of the present invention is to improve the above-mentioned conventional drawbacks by rational modification between the cylindrical case and the electric resistor.
本考案にかかる長さ検出用センサーは、上記目
的を達成するために、前記筒状ケースの、前記ロ
ツドの伸縮移動を片持ちで案内する摺接案内部を
設けた側に、前記帯板状電気抵抗体及び前記電気
接点が入り込む凹入部を形成してあることを特徴
構成とする。 In order to achieve the above-mentioned object, the length detection sensor according to the present invention has the strip-like shape on the side of the cylindrical case on which the sliding guide portion for guiding the expansion and contraction movement of the rod in a cantilevered manner is provided. A feature of the present invention is that a recessed portion is formed into which the electrical resistor and the electrical contact enter.
かかる特徴構成による作用効果は次の通りであ
る。 The effects of this characteristic configuration are as follows.
すなわち、ロツドの伸縮移動を片持で案内する
摺接案内部を設けた側に帯板状電気抵抗体及び電
気接点が入り込む凹入部を形成してあるから、摺
接案内部と、長さ検出するための電気抵抗体とが
ロツドの伸縮移動方向で重なることになつて、そ
の重なる長さ分、従来に比して筒状ケースのロツ
ドの伸縮移動方向での寸法を可及的に短くできる
とともに、ロツドをガタつきなく片持ち支持でき
る。 That is, since the recess into which the strip-shaped electrical resistor and the electrical contact are inserted is formed on the side where the sliding contact guide section that cantileverly guides the expansion and contraction movement of the rod is provided, the sliding contact guide section and the length detection section are formed. Since the electric resistor for the rod overlaps in the direction of the rod's expansion and contraction movement, the dimensions of the cylindrical case rod in the expansion and contraction movement direction can be made as short as possible by the length of the overlap compared to the conventional case. In addition, the rod can be supported on a cantilever without wobbling.
従つて、センサー全体としての長さを短くして
コンパクト化を図りながらも、検出精度を高く維
持でき、小型機器への使用等汎用性を高めるに至
つた。 Therefore, even though the overall length of the sensor is shortened to make it more compact, it is possible to maintain high detection accuracy and increase versatility, such as use in small devices.
以下、本考案構成の実施例を図面に基づいて説
明する。 Hereinafter, embodiments of the configuration of the present invention will be described based on the drawings.
第１図で示す乗用型耕耘機を構成するに、単動
型油圧シリンダ１にて上下に駆動揺動される左右
一対のリフトアーム２，２を備えた農用トラクタ
Ａの後部に、左右一対のロアーリンク３，３及び
一本のトツプリンク４を介してロータリ耕耘装置
Ｂを昇降自在に連結するとともに、前記リフトア
ーム２，２とロアーリンク３，３とをリフトロツ
ド５及び複動型油圧シリンダ６を介して枢支連結
し、もつて、前記油圧シリンダ１，６の作動制御
により、耕耘装置Ｂを農用トラクタＡに対して駆
動昇降ならびに駆動ローリング自在に構成してい
る。 The riding-type cultivator shown in FIG. The rotary cultivating device B is connected via the lower links 3, 3 and one top link 4 so as to be able to rise and fall freely, and the lift arms 2, 2 and the lower links 3, 3 are connected to a lift rod 5 and a double-acting hydraulic cylinder 6. By controlling the operation of the hydraulic cylinders 1 and 6, the tilling device B can be driven up and down and rolled with respect to the agricultural tractor A.
また、農用トラクタＡの後部に、トラクタの水
平面に対する左右傾斜角を電圧信号の変動として
検出するセンサー７を取付けるとともに、前記ロ
ーリング用油圧シリンダ６には、この油圧シリン
ダ６の伸縮量をもつて農用トラクタＡに対する耕
耘装置Ｂのローリング姿勢を検出し、かつ、その
検出結果を電圧信号の変動として出力する長さ検
出用センサーＳを付設している。 In addition, a sensor 7 is attached to the rear of the agricultural tractor A to detect the horizontal inclination angle of the tractor with respect to the horizontal plane as a fluctuation in the voltage signal. A length detection sensor S is attached that detects the rolling attitude of the tillage device B with respect to the tractor A and outputs the detection result as a voltage signal fluctuation.
そして、前記傾斜角検出用センサー７からの信
号に基づいて、耕耘装置Ｂの水平面に対する左右
傾斜角を設定範囲内維持させるに適するローリン
グ用油圧シリンダ６の目標伸縮量を演算させ、且
つ、長さ検出用センサーＳの信号によりシリンダ
６の伸縮量を確認させながら、シリンダ６を目標
伸縮量を自動的に作動させる、いわゆるローリン
グ制御を行なわせるように構成してある。 Then, based on the signal from the inclination angle detection sensor 7, a target expansion/contraction amount of the rolling hydraulic cylinder 6 suitable for maintaining the horizontal inclination angle of the tilling device B with respect to the horizontal plane within a set range is calculated, and the length is The cylinder 6 is configured to perform so-called rolling control in which the cylinder 6 is automatically actuated to a target expansion/contraction amount while confirming the expansion/contraction amount of the cylinder 6 based on a signal from the detection sensor S.
前記長さ検出用センサーＳを構成するに、第２
図乃至第３図で示すように、断面ほぼコの字状の
ケース本体８Ａとこれの開口側に着脱自在に取付
けられる板状の蓋体８Ｂとからなる筒状ケース８
内に、それの軸線方向にスライド伸縮移動自在な
状態でロツド９を挿嵌保持させ、そのうち、前記
筒状ケース８のケース本体８Ａの上端部を、前記
ローリング用油圧シリンダ６のボトム６Ａ側に螺
合固定されるピン状のブラケツト１０に取付ける
とともに、前記ロツド９の下端部を、前記ローリ
ング用油圧シリンダ６のＵ字型連結金具６Ｂに固
着されたブラケツト１１に取付けて、ローリング
用油圧シリンダ６と一体的に伸縮移動させるべく
構成している。 To configure the length detection sensor S, a second
As shown in Figures 3 to 3, a cylindrical case 8 consists of a case body 8A with a substantially U-shaped cross section and a plate-shaped lid 8B that is detachably attached to the opening side of the case body 8A.
The rod 9 is inserted and held in the cylindrical case 8 so as to be slidable and telescopically movable in the axial direction, and the upper end of the case body 8A of the cylindrical case 8 is placed on the bottom 6A side of the rolling hydraulic cylinder 6. It is attached to a pin-shaped bracket 10 that is screwed and fixed, and the lower end of the rod 9 is attached to a bracket 11 that is fixed to the U-shaped connecting fitting 6B of the rolling hydraulic cylinder 6. It is configured to extend and contract integrally with the main body.
前記筒状ケース８は、前記ブラケツト１０，１
１との取付け点ａ，ｂが筒状ケース８の中心線ｃ
上に位置する状態で、かつ、前記ローリング用油
圧シリンダ６と平行に姿勢する状態で取付けられ
ている。 The cylindrical case 8 is connected to the brackets 10 and 1.
The attachment points a and b with 1 are the center line c of the cylindrical case 8.
It is attached so that it is positioned above and parallel to the rolling hydraulic cylinder 6.
前記筒状ケース８の蓋体８Ｂ内面に、合成樹脂
製又は焼結成形された帯板状電気抵抗体１２及び
金属製の帯板状導電体１３を互いに平行姿勢で固
定保持する合成樹脂等の非導電性板状保持体１４
を取付けるとともに、前記電気抵抗体１２及び導
電体１３に摺接する二股状の電気接点１５を、前
記ロツド９の上端部に外嵌固着したブロツク体１
６にビス止めし、更に、前記電気抵抗体１２の両
端部に電圧を入力するためのコード１７Ａ，１７
Ｂを、かつ、前記導電体１３に検出電圧取出用の
コード１７Ｃを夫々接続している。 On the inner surface of the lid 8B of the cylindrical case 8, a synthetic resin or sintered plate-shaped electric resistor 12 and a metal band-shaped conductor 13 are fixed and held in parallel to each other. Non-conductive plate-shaped holder 14
The block body 1 has a bifurcated electric contact 15 which is in sliding contact with the electric resistor 12 and the conductor 13 and is fitted and fixed onto the upper end of the rod 9.
6 with screws, and furthermore, cords 17A, 17 for inputting voltage to both ends of the electric resistor 12.
B and a cord 17C for extracting the detected voltage is connected to the conductor 13, respectively.
前記筒状ケース８のケース本体８Ａ下端部で、
前記ロツド９をブツシユ１８及びシール材１９を
介して伸縮移動自在に片持ちで案内する摺接案内
部８ａを設けるとともに、この摺接案内部８ａ
と、前記電気抵抗体１２及び導電体１３とがロツ
ド９の伸縮移動方向で重なり合う状態で配設され
るように、前記電気抵抗体１２、導電体１３及び
前記電気接点１５が摺接案内部８ａ側に入り込む
凹入部２０を、第３図に示すように、設けてい
る。 At the lower end of the case body 8A of the cylindrical case 8,
A sliding contact guide portion 8a is provided which guides the rod 9 in a cantilevered manner so as to be telescopically movable via the bush 18 and the sealing material 19.
The electrical resistor 12, the electrical conductor 13, and the electrical contact 15 are arranged in the sliding contact guide portion 8a so that the electrical resistor 12 and the electrical conductor 13 are arranged in an overlapping state in the direction of expansion and contraction of the rod 9. A recessed portion 20 extending into the side is provided as shown in FIG.
前記電気抵抗体１２は板状保持体１４に樹脂固
定剤等の接着剤を介して取付けられており、ま
た、前記板状保持体１４も筒状ケース８の蓋体８
Ｂに接着剤を介して取付けられている。 The electrical resistor 12 is attached to a plate-shaped holder 14 via an adhesive such as a resin fixing agent, and the plate-shaped holder 14 is also attached to the lid 8 of the cylindrical case 8.
It is attached to B via adhesive.
本考案を実施するに、センサーＳの下端部をロ
アーリンク３に取付けるようにする等、センサー
Ｓの具体的取付構造は各種変更でき、又、ロツド
９に、出力用コード１７Ｃを埋設させるようにし
て、導電体１３を無くすようにする等、センサー
Ｓの具体構造も各種変更できる。 To implement the present invention, the specific mounting structure of the sensor S can be changed in various ways, such as attaching the lower end of the sensor S to the lower link 3, and the output cord 17C may be buried in the rod 9. Therefore, various changes can be made to the specific structure of the sensor S, such as eliminating the conductor 13.
第１図乃至第４図は本考案に係る実施例を示
し、第１図は乗用型耕耘機の後部斜視図、第２
図、第３図は長さ検出用センサーの側面図と拡大
断面図、第４図は第３図の−線断面図であ
る。第５図は従来の長さ検出用センサーの拡大断
面図である。
８……筒状ケース、８ａ……摺接案内部、９…
…ロツド、１２……電気抵抗体、２０……凹入
部。
1 to 4 show an embodiment of the present invention, and FIG. 1 is a rear perspective view of a riding-type cultivator, and FIG.
3 are a side view and an enlarged sectional view of the length detection sensor, and FIG. 4 is a sectional view taken along the line -- in FIG. 3. FIG. 5 is an enlarged sectional view of a conventional length detection sensor. 8... Cylindrical case, 8a... Sliding guide part, 9...
...Rod, 12...Electric resistor, 20...Recessed part.
Claims (1)
の軸線方向にスライド伸縮移動自在に片持ちで
挿嵌保持されるロツド９とを有し、前記筒状ケ
ース８の内面に帯板状電気抵抗体１２が付設さ
れているとともに、前記ロツド９には、前記電
気抵抗体１２の摺接位置変更により両者８，９
の伸縮量を電圧変化として検出させるための電
気接点１５が設けられている長さ検出用センサ
ーであつて、前記筒状ケース８の、前記ロツド
９の伸縮移動を片持ちで案内する摺接案内部８
ａを設けた側に、前記帯板状電気抵抗体１２及
び前記電気接点１５が入り込む凹入部２０を形
成してあることを特徴とする長さ検出用センサ
ー。 ２ 前記帯板状電気抵抗体１２が合成樹脂製であ
る実用新案登録請求の範囲第１項に記載の長さ
検出用センサー。[Claims for Utility Model Registration] 1. A cylindrical case 8 and a rod 9 that is inserted and held in a cantilevered manner so as to be slidable and telescopically movable in the axial direction of the cylindrical case 8. A strip-shaped electrical resistor 12 is attached to the inner surface of the rod 9, and the rod 9 has both 8 and 9 by changing the sliding contact position of the electrical resistor 12.
A length detection sensor is provided with an electric contact 15 for detecting the amount of expansion and contraction as a voltage change, and is a sliding contact guide that cantilevers the expansion and contraction movement of the rod 9 of the cylindrical case 8. Part 8
A length detection sensor characterized in that a recessed portion 20 into which the strip-shaped electrical resistor 12 and the electrical contact 15 enter is formed on the side where a is provided. 2. The length detection sensor according to claim 1, wherein the strip-shaped electrical resistor 12 is made of synthetic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9348883U JPS603406U (en) | 1983-06-17 | 1983-06-17 | Sensor for length detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9348883U JPS603406U (en) | 1983-06-17 | 1983-06-17 | Sensor for length detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS603406U JPS603406U (en) | 1985-01-11 |
| JPH0325121Y2 true JPH0325121Y2 (en) | 1991-05-31 |
Family
ID=30224328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9348883U Granted JPS603406U (en) | 1983-06-17 | 1983-06-17 | Sensor for length detection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS603406U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS585924U (en) * | 1981-07-03 | 1983-01-14 | 日本ケ−ス株式会社 | Assembly packaging box for handbags |
-
1983
- 1983-06-17 JP JP9348883U patent/JPS603406U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS585924U (en) * | 1981-07-03 | 1983-01-14 | 日本ケ−ス株式会社 | Assembly packaging box for handbags |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS603406U (en) | 1985-01-11 |
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