JPS62171899A - Controller for speed of elevation of elevation type working machine - Google Patents

Controller for speed of elevation of elevation type working machine

Info

Publication number
JPS62171899A
JPS62171899A JP1340286A JP1340286A JPS62171899A JP S62171899 A JPS62171899 A JP S62171899A JP 1340286 A JP1340286 A JP 1340286A JP 1340286 A JP1340286 A JP 1340286A JP S62171899 A JPS62171899 A JP S62171899A
Authority
JP
Japan
Prior art keywords
lifting
speed
detector
elevation
elevating
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
Application number
JP1340286A
Other languages
Japanese (ja)
Inventor
健吉 野坂
祐二 北村
繁 森田
川原 好博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Original Assignee
Kubota Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kubota Corp filed Critical Kubota Corp
Priority to JP1340286A priority Critical patent/JPS62171899A/en
Publication of JPS62171899A publication Critical patent/JPS62171899A/en
Pending legal-status Critical Current

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  • Forklifts And Lifting Vehicles (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、フォークリフト装置等の昇降型作業機の昇降
速度制御装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a lifting speed control device for a lifting type working machine such as a forklift device.

く従来の技術〉 昇降型作業機、例えば7オークリフト装置においては、
車体に立設したマストに沿って昇降自在に昇降台を設け
ると共に、この昇降台vc7オークA]2 を取付け、固定側に設けた昇降駆動装置(昇降シリンタ
)により昇降8を昇降させるようにしているが、従来、
昇降台の昇降速度は昇降域の全範囲にわたって同速であ
った。
Conventional technology> In lifting type work equipment, for example, 7 oak lift equipment,
An elevating platform is provided along the mast installed on the vehicle body so that it can be raised and lowered freely, and this elevating platform vc7oakA]2 is attached, and the elevating device 8 is raised and lowered by an elevating drive device (elevating cylinder) provided on the fixed side. However, conventionally,
The ascending and descending speed of the platform was the same throughout the entire ascending and descending range.

〈発明が解決17ようとする問題点〉 このように昇降ぢの昇降速度を全範囲にわたって同速と
した場合、フォーク上に荷物を載せて運搬する際にも、
昇降ぢが下方域にある時は別設支障、はないが、昇降ぢ
が上方域にある時には非常に安定性が悪くなり、早い速
度での荷物の昇降動作によって転倒する等の慣れがあっ
た。
<17 Problems to be Solved by the Invention> In this way, if the lifting speed is the same over the entire range, even when carrying a load on the fork,
When the lift is in the lower area, there is no problem with the separate installation, but when the lift is in the upper area, the stability becomes very poor, and there have been cases of falls due to the lifting and lowering of cargo at high speeds. .

く問題点を解決するための手段〉 本発明は、このような従来の問題点に鑑み、上方域での
作業部の昇降速度を下方域のそれよりも遅くして安定性
の向上を図るものであって、そのための具体的手段とし
て、昇降駆動装置の駆動によって、マストに沿って作業
部を昇降させるようにした昇降型作業機において、作業
部が昇降域の内の上部域にあることを検出する検出器と
、この検出器が働いたときに、作業部が下方域よりも低
扁、3 速で昇降するように昇降駆動装置を低速に切換える速度
切換手段とを設けたものである0く乍  用〉 作業部(181k下方域から上昇させると、下方域にあ
る間は、流量制御弁T3zが全開であるため、昇降シリ
ンダ(Iηを介して作業部(181が急速に上昇する。
Means for Solving the Problems> In view of these conventional problems, the present invention aims to improve stability by making the lifting speed of the working part in the upper area slower than that in the lower area. As a specific means for this purpose, in an elevating type work machine in which the working part is raised and lowered along the mast by driving the raising and lowering drive device, it is possible to make sure that the working part is located in the upper area of the raising and lowering area. This device is equipped with a detector for detecting the height and a speed switching means for switching the lifting drive device to a low speed so that when the detector is activated, the working part is lowered than the lower area and moves up and down at 3 speeds. When the working part (181k) is raised from the lower region, the flow control valve T3z is fully open while in the lower region, so the working part (181) is rapidly raised via the lifting cylinder (Iη).

そして作業部(181が上方域に達し検出器U9Jが働
くと、流量制御弁部が絞られ、以後、作業部(+81は
ゆっくりと低速で上昇する。
When the working part (181) reaches the upper region and the detector U9J is activated, the flow rate control valve part is throttled, and from then on, the working part (+81) slowly rises at a low speed.

下降する際には、上方域′t″はゆっくりと低速で、下
方域では急速に夫々wJ作する。
When descending, the upper region 't'' moves slowly and at a low speed, and the lower region rapidly moves wJ, respectively.

く実施例〉 以下、図示の実施例について本考案全詳述すると、第1
図及び第2図において、(1)は車体、(21は前輪、
(3)は後輪である。(4)はエンジン、(6)はボン
ネット、(61はクエイト、(7)は運転席、(8)は
ハンドル、(9)は安全フレームである。
Embodiments> Hereinafter, the present invention will be described in full detail with respect to the illustrated embodiments.
In the figure and Fig. 2, (1) is the vehicle body, (21 is the front wheel,
(3) is the rear wheel. (4) is the engine, (6) is the bonnet, (61 is the Kuwait, (7) is the driver's seat, (8) is the steering wheel, and (9) is the safety frame.

(101は車体]1)の前端部に配置された固定マスト
で第6図の如く左右一対のブラケットfl11及び枢軸
(121全介して車体(1;側のフレーム03)に枢着
されると共に、チルトシリンダ(14)によりチルト操
作可能である。固定マス臼10)には、これに対!、て
昇降自在に左右一対の昇降マスト(15+が設けらn、
またその昇降マスト(15jに対[−で昇降自在VCJ
j′4−降田(16jが設けられている。昇[年マスト
t151及び昇降台(16jは1端が固定マスl−+I
O+側に連結された慎動柴の昇降シリンダ(lηにより
、チェーン等の連動手段ケ介して昇降駆動され、昇降面
(1(ilは昇降マストt151の昇降量の約2倍だけ
昇降するように構成される。なお、昇降シリンダ(17
)は昇降駆動装置を構成する。昇降台(16)には荷役
用のフォーク(181が取付けられている。
(101 is the vehicle body) A fixed mast placed at the front end of the vehicle body 1 is pivotally connected to the vehicle body (1; side frame 03) through a pair of left and right brackets fl11 and a pivot shaft (121) as shown in FIG. Tilt operation is possible using the tilt cylinder (14).In contrast to this, the fixed mass mill 10)! , a pair of left and right lifting masts (15+ are provided) that can be raised and lowered freely.
In addition, the lifting mast (VCJ that can be raised and lowered with
j'4-Fukuda (16j is provided. Lifting mast t151 and lifting platform (16j has one end fixed mass l-+I
The lifting cylinder (lη) of the Shindo Shiba connected to the O+ side is driven up and down through an interlocking means such as a chain, and the lifting surface (1 (il) is raised and lowered by approximately twice the lifting amount of the lifting mast t151. The lifting cylinder (17
) constitutes a lifting drive. A cargo handling fork (181) is attached to the lifting platform (16).

固定マスト(lO)にはリミットスイッチ等から成る第
1検出器(lQlが、昇降マスト(15)には第1検出
器(19)を作動させる突起j20jが夫々上下方向V
C離れて設けられており、第2検出器ニ191は7オー
ク(+8Jが第1図の実線位置から第1検出器(19)
、突起20)間の開隔りの約2倍だけ上昇1.た位置、
即ちフォーク118)lか上方域にあることを検出する
ようになっている。
The fixed mast (lO) has a first detector (lQl) consisting of a limit switch, etc., and the elevating mast (15) has a protrusion j20j that activates the first detector (19) in the vertical direction V.
The second detector (191) is located at a distance of 7°C (+8J is the distance from the solid line position in Figure 1 to the first detector (19)).
, the protrusions 20) are raised by approximately twice the distance between them 1. position,
That is, it is detected that the fork 118) is in the upper region.

チルトシリンダ(141i第6図のよ′)i/こフレー
ム(131と同定マスト+101に両端が似支連結され
ており、そム5 のチルトシリンダ(141には固定マスI−+IO1の
前傾方向へのチルト状態を検出する第2検出器(21)
が作動機構シ4と共に付設されている。作動機構(2り
はチルトシリンダσ4;のシリンダ(23)側に設けら
れた筒体例と、ピストンロッド咋側に設けられた作動杆
端とから構成され、その筒体例と作動杆シQは摺動自在
に飯台されると共に、その筒体凶内何で作動行内に大径
の操作部惺ηが形成されている(第4図参照)。
The tilt cylinder (141i as shown in Fig. 6') is connected at both ends to the frame (131) and the identification mast +101, and the tilt cylinder (141i as shown in Fig. 6) is connected to the forward tilting direction of the fixed mass I-+IO1. a second detector (21) that detects the tilt state to
is attached together with the operating mechanism 4. The actuation mechanism (2 is the tilt cylinder σ4) is composed of a cylindrical body provided on the cylinder (23) side and an actuation rod end provided on the piston rod mouth side, and the cylindrical body and the actuation rod Q are connected to each other by sliding. It is movably mounted, and a large-diameter operating portion η is formed within the cylindrical body within the operating range (see FIG. 4).

第2検出器シIIはリミットスイッチ等から成るもので
あって、筒体例に取付けられており、この第2検出器ニ
1)は固定マストflolが垂直状態から前傾姿勢に傾
斜した時に操作部(2′7)″?l’操作されるように
なっている。
The second detector II consists of a limit switch, etc., and is attached to the cylindrical body, and this second detector II is activated when the fixed mast flol is tilted from a vertical position to a forward tilted position. (2'7)''?l' is operated.

昇降シリンダσηを制御する油圧回路は、第5図に示す
ように構成される。即ち、油圧ポンプ281と昇降シリ
ンダα力との間には、この昇降シリンダ同を昇降制御す
るための昇降制御弁29)が介装され、また昇降IIJ
御弁29+と昇降シリンダQηとを結ぶ油路’301!
311の一方には、流量制御弁′3Zと圧力スイッチ9
31とが設けられている。流量制御弁′321はソレノ
イド、蕉6 !341 ’i有する電磁型であって、ソレノイド13
4)が励磁1、た時に、油路13OIケ流れる作動油量
?絞り、昇降シリンダ(17)による7オーク081の
昇降速度を低速に切換えるように構成されている。なお
、この流量制御弁1321は切換手段を構成する。13
51はリリーフ弁である。
The hydraulic circuit for controlling the lifting cylinder ση is constructed as shown in FIG. That is, between the hydraulic pump 281 and the elevating cylinder α force, an elevating control valve 29) for controlling elevating and lowering the elevating cylinder is interposed, and the elevating cylinder IIJ
Oil passage '301 connecting control valve 29+ and lifting cylinder Qη!
On one side of 311, there is a flow control valve '3Z and a pressure switch 9.
31 are provided. The flow control valve '321 is a solenoid, and the flow rate control valve '321 is a solenoid. It is an electromagnetic type having 341 'i, and has a solenoid 13
4) When excitation is 1, what is the amount of hydraulic oil that flows through oil passage 13? It is configured to switch the lifting speed of the 7 oak 081 by the throttle and lifting cylinder (17) to a low speed. Note that this flow rate control valve 1321 constitutes a switching means. 13
51 is a relief valve.

昇降制御弁・291のスグール′36jは、第6因に示
すようにブラケット間に枢支された制御レバー138)
に連結されてお゛す、この制御レノ? −1381によ
って昇降制御弁29)を操作するようになっている。一
方、固定側には制御レバー+881 ’にはさむように
上昇スイッチ[39)と下降スイッチ鴎とが設けられ、
これらスイッチ[391140) T制御レバー[38
)の上昇、下降操作?検出するようVCなっている。
Suguru '36j of the elevation control valve 291 is a control lever 138 that is pivotally supported between brackets as shown in the sixth factor.
Is this control connected to? -1381 is used to operate the elevation control valve 29). On the other hand, on the fixed side, a rise switch [39] and a fall switch [39] are provided so as to be sandwiched between the control lever +881'.
These switches [391140] T control lever [38
) raising and lowering operation? VC is set to detect.

第7図は電気凹路を示12.4uは第1リレーで、目己
保持用のa接点B4′lJを有]7.第1検出器(19
)が働いてフォーク(川が上方域にあること全記憶する
ようになっている。そして、第1リレーlの出力用のa
接点(43)はソレノイドj341に接続されている。
FIG. 7 shows an electrical concave path, and 12.4u is the first relay, which has an a contact B4'lJ for self-holding]7. First detector (19
) works to remember that the fork (river is in the upper area).Then, the a for the output of the first relay l
Contact (43) is connected to solenoid j341.

(賊は第2リレーで、第1検出器(19)が働き、下降
スイ扁47 ツチ鴎が働いた時に、b接点(451を開いて第1リレ
ー1411による記憶全リセットするようになっていも
なお、第1検出器(191は2個のa接点(19−1)
(19−2) k有する。!461は警報ラングである
(The thief is the second relay, and when the first detector (19) is activated and the descending switch 47 is activated, the b contact (451) is opened and all memories are reset by the first relay 1411.) In addition, the first detector (191 is two a contacts (19-1)
(19-2) It has k. ! 461 is a warning rung.

上記構成において、昇唾…1j御弁四)の制御レバー(
381を上昇方向に操作すると、昇降制御弁29)が切
換わり、油圧ポンプ2alからの油が油路13o)を経
て昇降シリンダリηへと送られ、この昇降シリンダU7
)が伸長動作をするので、昇降マストリ5)、昇降ff
3U61を介[7てフォーク賎が上昇する。この時、流
量制御弁13zは最大流量の状態にあるため、フォーク
賭は所定の速度で急速に上昇する。
In the above configuration, the control lever (
381 in the upward direction, the lift control valve 29) is switched, and the oil from the hydraulic pump 2al is sent to the lift cylinder η via the oil passage 13o).
) performs an extension operation, so lifting must be done 5), lifting ff
Through 3U61, the fork shaft rises. At this time, since the flow rate control valve 13z is in the state of maximum flow rate, the fork bet increases rapidly at a predetermined speed.

一方、制御レバー(38)の上昇操作中は上昇スイッチ
(39)が働いている。そして、フォーク(18Jが2
L程度まで上昇]7、昇降範囲の上方域に達すると、突
起(20)で第1検出器(19jが働くので、第1リレ
ーlが励磁し、a接点“44ヲ閉じて上方域にフォーク
(181があること全記憶する。また第1リレー141
1の動作によってa接点瞥が閏じ、ンレノイド)3ψが
励磁12、流量制御弁3zが流量を最大から絞るので、
昇降シリンダ(+力の動作速度は、フォーク(18jが
下方域にある場合に比べて遅くなり、従って、フォーク
(18jは安定性を損なわないようにゆっくりと低速で
上昇する。
On the other hand, during the raising operation of the control lever (38), the raising switch (39) is working. And fork (18J is 2
7. When reaching the upper area of the lifting range, the first detector (19j) is activated at the protrusion (20), so the first relay l is energized, the a contact ``44'' is closed, and the fork moves to the upper area. (Remember that there is 181. Also, the first relay 141
As a result of the operation of 1, the a contact point is stepped, the renoid) 3ψ is excited 12, and the flow rate control valve 3z throttles the flow rate from the maximum.
The operating speed of the lifting cylinder (+ force) will be slower than when the fork (18j) is in the lower region, so the fork (18j) will rise slowly and at a low speed so as not to impair stability.

フォーク(181’に上昇後に下降させる1祭には、f
lilJ8レバー(38)を下降操作12、昇降制御弁
・29)?下降方向に切換え、昇降シリンダ(17)を
収縮動作させる。こ、の場合にも、フォーク(18jが
上方域にある聞には、フォーク(18jはゆっくりと下
降する。そ17て、その下降中に突起(20)によって
第1検出器(19)が働くと、下降スイッチ40)が働
いているため、第2リレー(44)が励磁17、b接点
145)が開くので、第1リレーlが消磁する。従って
、流量制御弁’321が最大流量に戻り、下方域ではフ
ォーク(I8)が悠遠に下降するのである。
Fork (181' to lower after rising, f
Lower the lilJ8 lever (38) 12, lift control valve 29)? Switch to the downward direction and cause the elevating cylinder (17) to perform a retracting operation. In this case as well, while the fork (18j) is in the upper region, the fork (18j) slowly descends.During its descent, the first detector (19) is activated by the protrusion (20). Then, since the lowering switch 40) is working, the second relay (44) is energized 17, and the b contact 145) is opened, so the first relay 1 is deenergized. Therefore, the flow rate control valve '321 returns to the maximum flow rate, and the fork (I8) descends far in the lower region.

チルトシリンダ(14f k沖ばじて固定マストtlo
l kチルトさせると、第2検出器(21)が働いてチ
ルト状態であることを検出する。そこで、そのチルト状
態のま″1″r:昇降制御弁29)を上昇に切換え、昇
降シリンダt171’に伸長動作させると、圧力スイッ
チ′331が働くので、警報ラング146)が点灯17
、チルト状態であることを警報する。従って、チルト状
態のまま7オーク(181を上昇させて積荷を落すこと
がない。
Tilt cylinder (14f k offshore fixed mast tlo
When it is tilted, the second detector (21) operates to detect the tilted state. Therefore, in the tilted state, when the lift control valve 29) is switched to the up position and the lift cylinder t171' is extended, the pressure switch '331 is activated, and the alarm rung 146) lights up (17).
, alerts you to the tilt status. Therefore, the 7 oak (181) will not be raised in the tilted state and the cargo will not drop.

なお、実施例では、昇降駆動装置として昇降シリンダσ
ηを示し、流量制御弁’3ZKよる流量の切換によって
速度調節を行なうようにしたが、これに限定されず1例
えば昇降駆動装置としてモータを使用し、その回転数を
切換えるようにしても良い。
In addition, in the embodiment, the lifting cylinder σ is used as the lifting drive device.
η, and the speed is adjusted by switching the flow rate using the flow rate control valve '3ZK, but the present invention is not limited to this. For example, a motor may be used as the lifting device and its rotation speed may be changed.

また作業部はフォーク賭以外のパケット等でも良い0 〈発明の効果〉 本発明によれば、作業部が上方域にある時には下方域よ
りも低速で作業部を昇降させるように1゜ているので、
作業部の昇降によって安定性か損なわれることはなく、
安全かつ能率の作業が行なえる。
Further, the working part may be a packet or the like other than a fork. <Effects of the Invention> According to the present invention, when the working part is in the upper region, the working part is raised and lowered by 1° at a slower speed than in the lower region. ,
Stability is not compromised by raising and lowering the working part.
Able to perform work safely and efficiently.

【図面の簡単な説明】[Brief explanation of drawings]

図UTJは本発明の一実施例を示]7.第1図は全体の
側面図、第2図は開平面図、第6図はマストチルト部の
側面図、第4図は第2検出器の説明図、扁、10 第5図は油圧回路図、第6図は弁操作部の側面図、第7
図は電気回路図である。 (10)・・・固定マスト、(I5)・・・昇降マスト
、(161・・・昇降台、(18)・・・7オーク、α
η・・・昇降シリンダ、i91・・・第1検出器、29
)・・・昇降制御弁、’321・・・流量制御弁。
Figure UTJ shows an embodiment of the invention]7. Fig. 1 is an overall side view, Fig. 2 is an open plan view, Fig. 6 is a side view of the mast tilt section, Fig. 4 is an explanatory diagram of the second detector, 10 Fig. 5 is a hydraulic circuit diagram, Figure 6 is a side view of the valve operating section, Figure 7
The figure is an electrical circuit diagram. (10)...Fixed mast, (I5)...Elevating mast, (161...Elevating platform, (18)...7 oak, α
η... Lifting cylinder, i91... First detector, 29
)...lift control valve, '321...flow control valve.

Claims (1)

【特許請求の範囲】[Claims] 1、昇降駆動装置の駆動によつて、マストに沿つて作業
部を昇降させるようにした昇降型作業機において、作業
部が昇降域の内の上部域にあることを検出する検出器と
、この検出器が働いたときに、作業部が下方域よりも低
速で昇降するように昇降駆動装置を低速に切換える速度
切換手段とを設けたことを特徴とする昇降型作業機の昇
降速度制御装置。
1. In an elevating type working machine that raises and lowers a working part along a mast by driving an elevating drive device, a detector for detecting that the working part is in an upper area of the elevating area; A lifting speed control device for a lifting type working machine, characterized in that the lifting speed control device is provided with a speed switching means for switching the lifting drive device to a low speed so that the working part moves up and down at a lower speed than the lower area when the detector is activated.
JP1340286A 1986-01-23 1986-01-23 Controller for speed of elevation of elevation type working machine Pending JPS62171899A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1340286A JPS62171899A (en) 1986-01-23 1986-01-23 Controller for speed of elevation of elevation type working machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1340286A JPS62171899A (en) 1986-01-23 1986-01-23 Controller for speed of elevation of elevation type working machine

Publications (1)

Publication Number Publication Date
JPS62171899A true JPS62171899A (en) 1987-07-28

Family

ID=11832129

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1340286A Pending JPS62171899A (en) 1986-01-23 1986-01-23 Controller for speed of elevation of elevation type working machine

Country Status (1)

Country Link
JP (1) JPS62171899A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02183318A (en) * 1989-01-09 1990-07-17 Toyota Autom Loom Works Ltd Flow rate controller
JP2008207905A (en) * 2007-02-23 2008-09-11 Toyota Industries Corp Cargo handling control device for industrial vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02183318A (en) * 1989-01-09 1990-07-17 Toyota Autom Loom Works Ltd Flow rate controller
JP2008207905A (en) * 2007-02-23 2008-09-11 Toyota Industries Corp Cargo handling control device for industrial vehicle

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