JPH0112749Y2 - - Google Patents
Info
- Publication number
- JPH0112749Y2 JPH0112749Y2 JP11854181U JP11854181U JPH0112749Y2 JP H0112749 Y2 JPH0112749 Y2 JP H0112749Y2 JP 11854181 U JP11854181 U JP 11854181U JP 11854181 U JP11854181 U JP 11854181U JP H0112749 Y2 JPH0112749 Y2 JP H0112749Y2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- relay
- switch
- normally open
- open contact
- 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
- 101100045633 Arabidopsis thaliana TCX3 gene Proteins 0.000 description 7
- 101150037491 SOL1 gene Proteins 0.000 description 7
- 101150090449 sol4 gene Proteins 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 1
Landscapes
- Forklifts And Lifting Vehicles (AREA)
- Relay Circuits (AREA)
Description
【考案の詳細な説明】
本考案は高所作業車におけるリセツト制御回路
に関するものである。[Detailed Description of the Invention] The present invention relates to a reset control circuit for an aerial work vehicle.
一般に高所作業車は作業台側に装着したコント
ロールパネルの各操作スイツチを作動することに
より作業台の旋回、昇降あるいはブーム伸縮等の
作業が行なわれるようになつている。そして、作
業中の事故防止のため第1図に示すように各操作
スイツチS1〜S4に共通のフートスイツチ
FTSを踏んだ状態で操作スイツチS1〜S4を
ONすると電源Bにより電磁バルブのソレノイド
SOL1,SOL1′…SOL4,SOL4′が作動され
て旋回作業等が行なわれ、フートスイツチFTS
から足を離すと同時にエンジンを除く全機能がス
トツプするいわゆるデツトマンブレーキ方式を採
用している。ところが、この方式は足で操作され
るフートスイツチFTSを使用しているためオペ
レータの意思に反して離したり踏んだりしてしま
うことが多く、この結果フートスイツチのON・
OFFを繰り返すと旋回作業等の急作動が繰り返
し行なわれるという欠陥があつた。 In general, high-altitude work vehicles are designed to rotate, raise and lower the work platform, extend and retract the boom, etc. by operating various operation switches on a control panel mounted on the work platform. In order to prevent accidents during work, a common foot switch is installed for each operation switch S1 to S4 as shown in Figure 1.
While stepping on FTS, press operation switches S1 to S4.
When turned on, power supply B causes the solenoid of the solenoid valve to
SOL1, SOL1'...SOL4, SOL4' are activated to perform turning work, etc., and the foot switch FTS is activated.
It uses a so-called deadman braking system, which stops all functions except the engine as soon as you take your foot off the brake. However, since this method uses a foot switch FTS that is operated by the foot, the operator often releases or depresses the foot switch against his/her will, resulting in the foot switch not being turned on or off.
There was a flaw in that repeated turning off would cause sudden operations such as turning operations to be repeated.
本考案の目的はフートスイツチと操作スイツチ
とにより構成された制御回路に新にリセツト回路
を組込むことにより、フートスイツチが繰り返し
ON・OFFされてもリセツトスイツチを操作しな
い限り続いて操作スイツチによる動作が行なわれ
るのを防止できる高所作業車におけるリセツト制
御回路を提供することにある。 The purpose of this invention is to incorporate a new reset circuit into the control circuit composed of a foot switch and an operation switch, so that the foot switch can be operated repeatedly.
To provide a reset control circuit for an aerial work vehicle that can prevent a reset switch from being operated continuously even if it is turned on or off unless the reset switch is operated.
以下、本考案を具体化した第一実施例を第2図
について説明する。この実施例は直流電源Bと同
電源Bに対し並列に接続された第1〜第3回路と
から構成されており、第1回路には旋回、昇降あ
るいはブームの伸縮等を行なう操作スイツチS1
〜S4が並列に接続され、各操作スイツチS1〜
S4にはそれぞれ旋回等の作業を行なう油圧シリ
ンダ(図示略)動作用の電磁バルブ(図示略)の
ソレノイドSOL1,SOL1′…SOL4,SOL4′
が並列に接続されている。 A first embodiment embodying the present invention will be described below with reference to FIG. This embodiment is composed of a DC power supply B and first to third circuits connected in parallel to the power supply B, and the first circuit includes an operation switch S1 for turning, raising and lowering, extending and retracting the boom, etc.
~S4 are connected in parallel, and each operating switch S1~
S4 includes solenoids SOL1, SOL1'...SOL4, SOL4' of electromagnetic valves (not shown) for operating hydraulic cylinders (not shown) that perform operations such as turning, respectively.
are connected in parallel.
第2回路にはフートスイツチFTS、第3回路
に接続した第二リレーCR2の常閉接点CR2−b
及び第一リレーCR1が直列に接続されている。
前記常閉接点CR2−bと並列に自己保持用の常
開接点CR1−aが接続されている。前記第1回
路には前記操作スイツチS1〜S4の並列回路と
直列に第一リレーCR1の第一常開接点CR1−
a′が接続されている。 The second circuit has a foot switch FTS, and the normally closed contact CR2-b of the second relay CR2 connected to the third circuit.
and a first relay CR1 are connected in series.
A self-holding normally open contact CR1-a is connected in parallel with the normally closed contact CR2-b. The first circuit includes a first normally open contact CR1- of the first relay CR1 in series with the parallel circuit of the operating switches S1 to S4.
a′ is connected.
第3回路には前記第一リレーCR1の第二常開
接点CR1−a″、常閉型のリセツトスイツチSr及
び第二リレーCR2が直列に接続され、前記第二
リレーCR2の自己保持用常開接点CR2−aが前
記第二常開接点CR1−a″に並列に接続されてい
る。 A second normally open contact CR1-a'' of the first relay CR1, a normally closed reset switch Sr, and a second relay CR2 are connected in series to the third circuit, and the second normally open contact of the second relay CR2 is connected in series. A contact CR2-a is connected in parallel to the second normally open contact CR1-a''.
次に、前記のように構成した高所作業車のリセ
ツト制御回路について、その作用を説明する。 Next, the operation of the reset control circuit for the aerial work vehicle constructed as described above will be explained.
今、作業台の旋回作業等を行なうため、フート
スイツチFTSをONすると、第2回路の第一リレ
ーCR1が励磁され、その自己保持用常開接点CR
1−aが閉じられるとともに、第1回路の第一常
開接点CR1−a′及び第3回路の第二常開接点CR
1−a″が閉じられる。すると、第3回路が閉路さ
れるので、第二リレーCR2が励磁されて、その
第2回路の常閉接点CR2−bが開かれるととも
に、第3回路の自己保持用常開接点CR2−aが
閉じられる。 Now, when the foot switch FTS is turned on to perform work such as rotating the workbench, the first relay CR1 of the second circuit is energized, and its self-holding normally open contact CR
1-a is closed, and the first normally open contact CR1-a' of the first circuit and the second normally open contact CR1-a' of the third circuit are closed.
1-a" is closed. Then, the third circuit is closed, so the second relay CR2 is energized, the normally closed contact CR2-b of the second circuit is opened, and the third circuit is self-holding. Normally open contact CR2-a is closed.
この状態で例えば作業台旋回のため操作スイツ
チS1を押してソレノイドSOL1を励磁すると、
旋回用油圧シリンダが駆動され作業台が右又は左
に旋回される。このような各種作業の途中で誤つ
てフートスイツチFTSを開路すると、第一リレ
ーCR1が消磁されて閉じていた常開接点CR1−
a′,CR1−aが開かれて第1、第2回路が開か
れるが、CR1−a″が開かれても自己保持用の常
開接点CR2−aが閉じられているので、第3回
路は閉路されたままに保持され、このため第2回
路の常閉接点CR2−bは開かれた状態に保持さ
れる。従つて、再度フートスイツチFTSを踏ん
でも第2回路は閉路されず、第1回路の操作スイ
ツチS1〜S4が閉じられた状態でスイツチ
FTSのON・OFFを繰り返しても作業台の旋回作
業等が行なわれることはない。 In this state, for example, if you press the operation switch S1 to energize the solenoid SOL1 to rotate the work platform,
The swing hydraulic cylinder is driven to swing the workbench to the right or left. If you accidentally open the foot switch FTS during these various operations, the first relay CR1 will be demagnetized and the normally open contact CR1-
a', CR1-a are opened, and the first and second circuits are opened, but even if CR1-a'' is opened, the normally open contact CR2-a for self-holding is closed, so the third circuit is held closed, and therefore the normally closed contact CR2-b of the second circuit is held open.Therefore, even if you step on the foot switch FTS again, the second circuit will not be closed and the first When the circuit operation switches S1 to S4 are closed,
Even if the FTS is turned on and off repeatedly, the workbench will not be rotated.
改めて、作業を行なうときにはリセツトスイツ
チSrを開いて第二リレーCR2を消磁すると、閉
じていた常開接点CR2−aが開かれて自己保持
が解除されるとともに、第2回路の開いていた常
閉接点CR2−bが閉じられ、第2図の状態に復
帰される。この状態でフートスイツチFTSをON
すると前述したように各種作業が可能となる。 When starting work again, open the reset switch Sr to demagnetize the second relay CR2, which opens the closed normally open contact CR2-a and releases the self-holding state, and also resets the open normally closed contact of the second circuit. Contact CR2-b is closed and the state shown in FIG. 2 is restored. In this state, turn on the foot switch FTS.
Then, various operations can be performed as described above.
このように本考案第一実施例においては、第2
回路にフートスイツチFTS、第一リレーCR1及
び第3回路の第二リレーCR2の常閉接点CR2−
bを直列に接続し、一方第3回路にはリセツトス
イツチSrと第二リレーCR2を接続したので、フ
ートスイツチFTSをONしてから一度OFFした後
は、リセツトスイツチSrを押して開いていた常
閉接点CR2−bを閉じない限り、スイツチFTS
をON・OFFしても第1回路は閉・開路されるこ
とはなく、操作スイツチによる作業が行なわれる
のを防止することができる。 In this way, in the first embodiment of the present invention, the second embodiment
The circuit includes a foot switch FTS, a normally closed contact CR2- of the first relay CR1 and the second relay CR2 of the third circuit.
b are connected in series, and on the other hand, the reset switch Sr and the second relay CR2 are connected to the third circuit, so after turning the foot switch FTS ON and then turning it OFF, the normally closed contact that was opened when the reset switch Sr is pressed Unless CR2-b is closed, switch FTS
Even if the switch is turned ON or OFF, the first circuit will not be closed or opened, and work by the operation switch can be prevented.
次に、本考案の第二実施例を第3図について説
明する。 Next, a second embodiment of the present invention will be described with reference to FIG.
この実施例は直流電源Bと同電源に並列接続さ
れた第1、第2回路と、前記電源Bと第1回路と
の間に接続されたフートスイツチFTSにより構
成されている。そして、第1回路には操作スイツ
チS1〜S4及びソレノイドSOL1,SOL1′…
SOL4,SOL4′の並列回路が接続され、前記操
作スイツチS1〜S4の並列回路と直列に第2回
路に接続したリレーCRの常開接点CR−a′が接続
されている。 This embodiment consists of a DC power supply B, first and second circuits connected in parallel to the same power supply, and a foot switch FTS connected between the power supply B and the first circuit. The first circuit includes operation switches S1 to S4 and solenoids SOL1, SOL1'...
A parallel circuit of SOL4 and SOL4' is connected, and a normally open contact CR-a' of a relay CR connected in series to the second circuit is connected to the parallel circuit of the operating switches S1 to S4.
第2回路は一方がフートスイツチFTSと前記
常開接点CR−a′の共通接点に、他方は電源Bに
それぞれ接続され、リセツトスイツチSr及びリ
レーCRの直列回路と、前記リセツトスイツチSr
に並列に接続されたリレーCRの自己保持用常開
接点CR−aと、前記リレーCRに並列接続された
サージ吸収用のダイオードDとよりなつている。 The second circuit has one side connected to the common contact of the foot switch FTS and the normally open contact CR-a', and the other side connected to the power supply B, and includes a series circuit of the reset switch Sr and the relay CR, and a series circuit of the reset switch Sr.
It consists of a self-holding normally open contact CR-a of the relay CR connected in parallel to the relay CR, and a surge absorbing diode D connected in parallel to the relay CR.
今、フートスイツチFTSを踏み、リセツトス
イツチSrを入れると、リレーCRが励磁され、常
開接点CR−aが閉じられ第2回路が自己保持さ
れるとともに、常開接点CR−a′が閉じられる。
この状態で操作スイツチS1〜S4を操作する
と、所望する作業が行なわれる。フートスイツチ
FTSを誤つてOFFするとリレーCRが消磁され、
第1回路の閉じていた常開接点CR−a′が開かれ
る。従つて、操作スイツチS1〜S4を閉じた状
態でフートスイツチFTSをON・OFFしてもソレ
ノイドは作動されず、作業台の旋回等が防止され
る。なお、改めて旋回作業等を行ないたいときに
はフートスイツチFTSとリセツトスイツチSrを
ONすればよい。 Now, when foot switch FTS is stepped on and reset switch Sr is turned on, relay CR is energized, normally open contact CR-a is closed, the second circuit is self-held, and normally open contact CR-a' is closed.
If the operating switches S1 to S4 are operated in this state, the desired work will be performed. foot switch
If FTS is turned OFF by mistake, relay CR will be demagnetized,
The normally open contact CR-a' of the first circuit is opened. Therefore, even if the foot switch FTS is turned on or off with the operation switches S1 to S4 closed, the solenoid is not activated, and the workbench is prevented from turning. In addition, if you want to perform turning work etc. again, use the foot switch FTS and reset switch Sr.
Just turn it on.
このように本考案はフートスイツチFTS、操
作スイツチS1〜S4等よりなる制御回路に新に
リセツトスイツチ、リレー等よりなるリセツト回
路を組込んだので、フートスイツチがオペレータ
の意に反してON・OFFされてもリセツトスイツ
チを操作しない限り続いて操作スイツチによる動
作が行なわれるのを防止することができる効果が
ある。 In this way, the present invention incorporates a new reset circuit consisting of a reset switch, relay, etc. into the control circuit consisting of the foot switch FTS, operating switches S1 to S4, etc., so that the foot switch is not turned on or off against the operator's will. This also has the effect of preventing the operation switch from being operated continuously unless the reset switch is operated.
第1図は従来の高所作業車の制御回路の一例を
示す電気回路図、第2図は本考案のリセツト制御
回路の第一実施例を示す電気回路図、第3図は本
考案の第二実施例を示す電気回路図である。
電源B、フートスイツチFTS、操作スイツチ
S1〜S4、リレーCR,CR1,CR2、リセツ
トスイツチSr。
Fig. 1 is an electric circuit diagram showing an example of the control circuit of a conventional aerial work vehicle, Fig. 2 is an electric circuit diagram showing a first embodiment of the reset control circuit of the present invention, and Fig. 3 is an electric circuit diagram showing an example of the reset control circuit of the present invention. FIG. 2 is an electrical circuit diagram showing two embodiments. Power supply B, foot switch FTS, operation switches S1 to S4, relays CR, CR1, CR2, reset switch Sr.
Claims (1)
スイツチと、 フートスイツチと、 前記フートスイツチにより動作され前記操作
スイツチ回路に接続した常開接点をON・OFF
するようにしたリレーと、 前記フートスイツチがOFFされ前記リレー
が消磁されると、同フートスイツチを再度ON
しても前記リレーをONしないようにしたリセ
ツトスイツチ回路と により構成したことを特徴とする高所作業車に
おけるリセツト制御回路。 2 電源には第1〜第3回路が並列に接続され、
第1回路には第一リレーの常開接点及び操作ス
イツチの並列回路が接続され、第2回路にはフ
ートスイツチ、第二リレーの常閉接点及び前記
第一リレーが直列に接続され、同第一リレーの
自己保持用常開接点が前記常閉接点に並列に接
続され、さらに第3回路には前記第一リレーの
常開接点、リセツトスイツチ及び第二リレーが
それぞれ直列に接続され、同第二リレーの自己
保持用常開接点がこの第3回路の常開接点に並
列に接続されている実用新案登録請求の範囲第
1項記載の高所作業車におけるリセツト制御回
路。 3 電源には第1、第2回路が並列に接続され、
前記電源と第1回路の間にはフートスイツチが
接続され、同第1回路にはリレーの常開接点及
び操作スイツチの並列回路が直列接続され、第
2回路にはリセツトスイツチ及び前記リレーが
直列に接続され、同リレーの自己保持用常開接
点がリセツトスイツチに並列に接続されている
実用新案登録請求の範囲第1項記載の高所作業
車におけるリセツト制御回路。[Claims for Utility Model Registration] 1. A plurality of operating switches each connected in parallel to a power source, a foot switch, and turning on and off a normally open contact operated by the foot switch and connected to the operating switch circuit.
When the foot switch is turned off and the relay is demagnetized, the foot switch is turned on again.
1. A reset control circuit for an aerial work vehicle, comprising a reset switch circuit configured to prevent the relay from being turned on even when the relay is turned on. 2 The first to third circuits are connected in parallel to the power supply,
A normally open contact of a first relay and a parallel circuit of an operation switch are connected to the first circuit, a foot switch, a normally closed contact of a second relay, and the first relay are connected in series to the second circuit. A normally open contact for self-holding of the relay is connected in parallel to the normally closed contact, and a normally open contact of the first relay, a reset switch, and a second relay are connected in series to the third circuit, and the normally open contact of the first relay is connected in series to the normally closed contact. A reset control circuit for an aerial work vehicle according to claim 1, wherein the self-holding normally open contact of the relay is connected in parallel to the normally open contact of the third circuit. 3 The first and second circuits are connected in parallel to the power supply,
A foot switch is connected between the power source and a first circuit, a normally open contact of a relay and a parallel circuit of an operating switch are connected in series to the first circuit, and a reset switch and the relay are connected in series to the second circuit. A reset control circuit for an aerial work vehicle according to claim 1, wherein the self-holding normally open contact of the relay is connected in parallel to the reset switch.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11854181U JPS5824937U (en) | 1981-08-10 | 1981-08-10 | Reset control circuit for aerial work vehicles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11854181U JPS5824937U (en) | 1981-08-10 | 1981-08-10 | Reset control circuit for aerial work vehicles |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5824937U JPS5824937U (en) | 1983-02-17 |
JPH0112749Y2 true JPH0112749Y2 (en) | 1989-04-13 |
Family
ID=29912661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11854181U Granted JPS5824937U (en) | 1981-08-10 | 1981-08-10 | Reset control circuit for aerial work vehicles |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5824937U (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62205995A (en) * | 1986-03-05 | 1987-09-10 | 株式会社豊田自動織機製作所 | Safety operation controller in height service car |
-
1981
- 1981-08-10 JP JP11854181U patent/JPS5824937U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5824937U (en) | 1983-02-17 |
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