JPS6167505U - - Google Patents
Info
- Publication number
- JPS6167505U JPS6167505U JP15179084U JP15179084U JPS6167505U JP S6167505 U JPS6167505 U JP S6167505U JP 15179084 U JP15179084 U JP 15179084U JP 15179084 U JP15179084 U JP 15179084U JP S6167505 U JPS6167505 U JP S6167505U
- Authority
- JP
- Japan
- Prior art keywords
- inner cylinder
- proximity switch
- post
- signal emitted
- magnetic
- 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.)
- Granted
Links
- 230000008602 contraction Effects 0.000 claims 1
- 239000000696 magnetic material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Jib Cranes (AREA)
Description
第１図及び第２図は夫々本考案一実施例の平面
図及び縦断側面図、第３図は第１図の一部拡大図
、第４図はフリツプフロツプ回路図、第５図はそ
のタイムチヤート、第６図は高所作業車の側面図
、第７図及び第８図は夫々従来型クレーン車の側
面図及びその要部拡大図である。
１…外筒、２…内筒、４，５…磁気型近接スイ
ツチ、７，８…非磁性板、１０，１１…Ｄフリツ
プフロツプ、１２，１３…ＡＮＤゲート、１４…
加減算器。
Figures 1 and 2 are a plan view and a longitudinal side view of an embodiment of the present invention, Figure 3 is a partially enlarged view of Figure 1, Figure 4 is a flip-flop circuit diagram, and Figure 5 is a time chart thereof. , FIG. 6 is a side view of the aerial work vehicle, and FIGS. 7 and 8 are side views and enlarged views of essential parts of a conventional crane vehicle, respectively. DESCRIPTION OF SYMBOLS 1... Outer cylinder, 2... Inner cylinder, 4, 5... Magnetic proximity switch, 7, 8... Non-magnetic plate, 10, 11... D flip-flop, 12, 13... AND gate, 14...
Adder/subtractor.
Claims (1)
した伸縮自在杆において、相互に磁気干渉を生じ
ない間隔を設けた左右一対の磁気型の近接スイツ
チを、その検出ヘツドが動作距離以内の間隔をお
いて内筒に対向するように外筒の前端部に取付け
、該近接スイツチの切換え可能な大きさの２倍以
上の内筒前後方向一定長さを持つ非磁性板を、該
内筒の伸縮時に各近接スイツチが夫々切換えられ
るように内筒の前後方向に一定ピツチで２列に取
付けて、左右相対応する非磁性板間の内筒前後方
向位相を半分宛ずらせ、内筒伸長時に先作動側近
接スイツチの発する信号により後作動側近接スイ
ツチの発する信号を加算パルスとして、又内筒収
縮時に先作動側近接スイツチの発する信号により
後作動側近接スイツチの発する信号を減算パルス
として夫々加減算器に入力させるフリツプフロツ
プ回路を設けたことを特徴とする伸縮自在杆の伸
縮長さ検出装置。 In a telescoping rod in which an inner cylinder made of a magnetic material is extendably inserted into an outer cylinder, a pair of left and right magnetic proximity switches are installed at a distance that does not cause mutual magnetic interference. A non-magnetic plate is attached to the front end of the outer cylinder so as to face the inner cylinder at a distance, and has a fixed length in the longitudinal direction of the inner cylinder and is at least twice the switchable size of the proximity switch. The proximity switches are installed in two rows at a constant pitch in the front-rear direction of the inner cylinder so that they can be switched respectively when the inner cylinder expands and contracts. Add/subtract the signal emitted by the post-action proximity switch as an addition pulse based on the signal emitted by the proximity switch on the post-action side, and use the signal emitted by the proximity switch on the post-action side as a subtraction pulse based on the signal emitted by the proximity switch on the post-action side when the inner cylinder contracts. 1. A device for detecting the length of extension and contraction of a telescoping rod, characterized in that it is provided with a flip-flop circuit for inputting data into a retractable rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15179084U JPH0348481Y2 (en) | 1984-10-09 | 1984-10-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15179084U JPH0348481Y2 (en) | 1984-10-09 | 1984-10-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6167505U true JPS6167505U (en) | 1986-05-09 |
| JPH0348481Y2 JPH0348481Y2 (en) | 1991-10-16 |
Family
ID=30709885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15179084U Expired JPH0348481Y2 (en) | 1984-10-09 | 1984-10-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0348481Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014162595A (en) * | 2013-02-26 | 2014-09-08 | Kobelco Cranes Co Ltd | Control device of boom elongating and contracting mechanism |
-
1984
- 1984-10-09 JP JP15179084U patent/JPH0348481Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014162595A (en) * | 2013-02-26 | 2014-09-08 | Kobelco Cranes Co Ltd | Control device of boom elongating and contracting mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0348481Y2 (en) | 1991-10-16 |
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