JPH0576220A - Riding rice transplanter - Google Patents
Riding rice transplanterInfo
- Publication number
- JPH0576220A JPH0576220A JP5020092A JP5020092A JPH0576220A JP H0576220 A JPH0576220 A JP H0576220A JP 5020092 A JP5020092 A JP 5020092A JP 5020092 A JP5020092 A JP 5020092A JP H0576220 A JPH0576220 A JP H0576220A
- Authority
- JP
- Japan
- Prior art keywords
- rice
- rice transplanter
- riding
- vehicle body
- planting
- 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
- 235000007164 Oryza sativa Nutrition 0.000 title claims abstract description 62
- 235000009566 rice Nutrition 0.000 title claims abstract description 62
- 240000007594 Oryza sativa Species 0.000 title 1
- 241000209094 Oryza Species 0.000 claims abstract description 61
- 230000003028 elevating effect Effects 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 239000002689 soil Substances 0.000 claims abstract description 12
- 238000005096 rolling process Methods 0.000 description 4
- 102100025168 Calpain-15 Human genes 0.000 description 2
- 101000934071 Homo sapiens Calpain-15 Proteins 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
Landscapes
- Transplanting Machines (AREA)
Abstract
(57)【要約】 （修正有）
【目的】苗の植付け姿勢を良くできる乗用型田植機を得
る。
【構成】乗用型走行車体１に田植装置１０をリンク機構
１１を介して上下動自在に装着して、このリンク機構１
１を昇降装置３１により前記農用作業機の荷重を支持す
べく構成すると共に、前記田植装置１０に設けた泥面に
対する農用作業機の位置を検出する検出装置２３，２
４，２５の検出信号により昇降装置３１の作動を制御す
べく構成した乗用型田植機において、乗用型走行車体１
の駆動後輪９・９の後方に苗植付け位置前方を整地する
整地具１５を昇降自在に配設し、田植装置１０の所定以
上の上昇に伴って整地具１５が上動し、かつ、田植装置
１０を下降させた田植作業時には自由に上下動できるよ
うに整地具１５を昇降装置３１に連動させて設けた。
(57) [Summary] (Corrected) [Purpose] To obtain a riding-type rice transplanter that can improve the posture of planting seedlings. [Structure] A rice transplanter 10 is mounted on a riding type vehicle body 1 via a link mechanism 11 so as to be movable up and down.
1 is configured to support the load of the agricultural work machine by an elevating device 31, and detecting devices 23 and 2 for detecting the position of the agricultural work machine with respect to the mud surface provided in the rice transplanting device 10.
In the riding type rice transplanter configured to control the operation of the lifting device 31 by the detection signals of 4, 25, the riding type traveling vehicle body 1
A soil leveling tool 15 for leveling the front of the seedling planting position is arranged rearwardly of the rear drive wheels 9 and 9 of the rear wheel 9, so that the soil leveling tool 15 moves upward as the rice planting apparatus 10 rises above a predetermined level, and The leveling implement 15 is provided in conjunction with the elevating device 31 so that it can be freely moved up and down during the rice planting work in which the device 10 is lowered.
Description
【０００１】[0001]
【産業上の利用分野】この発明は、乗用型走行車体に田
植装置をリンク機構を介して上下動自在に装着して、こ
のリンク機構を昇降装置により前記田植装置の荷重を支
持すべく構成した乗用型田植機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is constructed such that a rice transplanter is mounted on a riding type vehicle body so as to be vertically movable via a link mechanism, and the link mechanism is configured to support the load of the rice transplanter by an elevating device. It is about riding rice transplanters.
【０００２】[0002]
【従来の技術】この種の従来技術としては、特開昭５７
−２６５０７号公報に示すように、乗用型走行車体に田
植装置をリンク機構を介して上下動自在に装着して、こ
のリンク機構を昇降装置により前記農用作業機の荷重を
支持すべく構成し、田植装置に設けた泥面に対する農用
作業機の位置を検出する検出装置の検出信号により昇降
装置の作動を制御するようにした乗用型田植機がある。2. Description of the Related Art As a conventional technique of this kind, Japanese Patent Application Laid-Open No. 57-57
As shown in Japanese Patent No. 26507, a rice transplanter is mounted on a riding type vehicle body so as to be vertically movable via a link mechanism, and the link mechanism is configured to support the load of the agricultural work machine by an elevating device. There is a riding rice transplanter in which the operation of the lifting device is controlled by a detection signal of a detection device that detects the position of the agricultural work machine with respect to the mud surface provided in the rice transplanter.
【０００３】[0003]
【発明が解決しようとする課題】上記の従来技術では、
田植装置に整地フロートが設けられていないので植付け
る苗を整地フロートが傾けたり場合によっては押し倒し
てしまうような不具合は一掃されるが、苗植え付け位置
を整地する整地具がないので苗の植付け姿勢が悪くなり
実用化できないものであった。SUMMARY OF THE INVENTION In the above prior art,
Since the rice planting device does not have a leveling float, problems such as tilting the leveling float or pushing it down in some cases can be eliminated, but there is no leveling tool to level the seedling planting position, so the seedling planting posture It became worse and could not be put to practical use.
【０００４】[0004]
【課題を解決するための手段】上述の従来技術の課題を
解決するために、この発明は、乗用型走行車体１に田植
装置１０をリンク機構１１を介して上下動自在に装着し
て、このリンク機構１１を昇降装置３１により前記農用
作業機の荷重を支持すべく構成すると共に、前記田植装
置１０に設けた泥面に対する農用作業機の位置を検出す
る検出装置２３…の検出信号により前記昇降装置３１の
作動を制御すべく構成した乗用型田植機において、乗用
型走行車体１の駆動後輪９・９の後方に苗植付け位置前
方を整地する整地具１５を昇降自在に配設し、田植装置
１０の所定以上の上昇に伴って整地具１５が上動し、か
つ、田植装置１０を下降させた田植作業時には自由に上
下動できるように整地具１５を昇降装置３１に連動させ
て設けた乗用型田植機としたものである。In order to solve the above-mentioned problems of the prior art, according to the present invention, a rice transplanter 10 is mounted on a riding type vehicle body 1 via a link mechanism 11 so as to be vertically movable. The link mechanism 11 is configured to support the load of the agricultural work machine by an elevating device 31, and the elevating / lowering is performed by a detection signal of a detection device 23 ... Detecting the position of the agricultural work machine with respect to the mud surface provided in the rice transplanting device 10. In the riding type rice transplanter configured to control the operation of the device 31, a leveling implement 15 for arranging the front of the seedling planting position is arranged behind the driving rear wheels 9, 9 of the riding type traveling vehicle body 1 so as to be lifted and lowered. The leveling implement 15 is provided in association with the elevating device 31 so that the leveling implement 15 moves upward as the device 10 rises above a predetermined level and can freely move up and down during the rice planting work in which the rice transplanting device 10 is lowered. Riding type rice field It is obtained by a machine.
【０００５】[0005]
【発明の作用効果】この発明は、乗用型走行車体１に田
植装置１０をリンク機構１１を介して上下動自在に装着
して、このリンク機構１１を昇降装置３１により前記農
用作業機の荷重を支持すべく構成すると共に、前記田植
装置１０に設けた泥面に対する農用作業機の位置を検出
する検出装置２３…の検出信号により前記昇降装置３１
の作動を制御すべく構成した乗用型田植機において、乗
用型走行車体１の駆動後輪９・９の後方に苗植付け位置
前方を整地する整地具１５を昇降自在に配設し、田植装
置１０を下降させた田植作業時には自由に上下動できる
ように整地具１５を昇降装置３１に連動させて設けたこ
とにより、田植作業時には整地具１５を田面に作用させ
て確実に整地作用させることができると共に、検出装置
２３…による泥面に対する田植装置の位置の検出は高速
の作業速度でも正確になり昇降装置３１の作動制御が適
正に行なえるので、高速の作業速度でも良好な田植え作
業が行なえる。According to the present invention, the rice transplanter 10 is mounted on the riding type vehicle body 1 through the link mechanism 11 so as to be vertically movable, and the link mechanism 11 is lifted by the elevator 31 to load the agricultural working machine. The lifting device 31 is configured to be supported, and is detected by a detection signal of a detection device 23 ...
In the riding-type rice transplanter configured to control the operation of the rice-planting apparatus 10, a rice field planting device 10 is provided which is arranged rearward of the driving rear wheels 9 of the riding-type traveling vehicle body 1 so as to raise and lower the seedling planting position forward. Since the soil leveling tool 15 is provided in conjunction with the elevating device 31 so that it can be freely moved up and down during the rice transplanting work in which the soil is lowered, the soil leveling implement 15 can be made to act on the rice field during the rice transplanting work so that the soil leveling operation can be performed reliably. At the same time, the detection of the position of the rice planting device with respect to the mud surface by the detection device 23 is accurate even at a high working speed, and the operation control of the lifting device 31 can be appropriately performed. .
【０００６】また、田植装置１０の所定以上の上昇に伴
って整地具１５も上動するようにしたことにより、機体
旋回時に昇降装置３１により田植装置１０を上昇させる
ことにより整地具１５も田面から浮上するので、整地具
１５によって泥土が押されて植付け苗の姿勢を乱したり
押し倒したりすることを防止できる。その上、整地具１
５の昇降を田植装置１０の昇降装置３１に連動させて設
けたことにより、整地具１５の昇降操作が前記昇降装置
３１を作動させるだけで自動的にできるようになり、然
も、整地具１５を昇降させる特別な昇降機構がいらない
ので構造が簡略で安価な機械を得ることができる。Further, since the soil leveling tool 15 is also moved upward when the rice transplanting apparatus 10 is lifted more than a predetermined amount, the soil leveling tool 15 is also lifted from the rice field by raising the rice transplanting apparatus 10 by the lifting device 31 during turning of the machine body. Since it floats, it is possible to prevent the soil conditioner 15 from pushing the mud to disturb the posture of the planted seedling or push it down. Besides, the leveling tool 1
By providing the lifting and lowering of 5 in conjunction with the lifting and lowering device 31 of the rice transplanter 10, the lifting and lowering operation of the leveling implement 15 can be automatically performed only by operating the lifting and lowering device 31. Since a special elevating mechanism for elevating and lowering the machine is not required, it is possible to obtain an inexpensive machine with a simple structure.
【０００７】[0007]
【実施例】この発明の一実施例を図面に基づいて詳細に
説明する。１は乗用型走行車体であって、機体２にエン
ジン３，操向ハンドル４，ミッションケ−ス５，操縦席
６，操向用駆動前輪７・７，及びミッションケ−ス５の
左右両側より後方下方に向けて延出されたチェンケース
８・８に設けられた駆動後輪９・９等にて構成されてい
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. The reference numeral 1 designates a riding type vehicle body, and an airframe 2 includes an engine 3, a steering handle 4, a mission case 5, a cockpit 6, steering front wheels 7 and 7, and left and right sides of a mission case 5. It is composed of drive rear wheels 9.9 provided on a chain case 8.8 extending downward rearward.
【０００８】１０はリンク機構１１にて前記乗用型走行
車体１に上下動自在に装着された田植装置であって、植
付伝動ケース１２、左右往復動自在の苗タンク１３、苗
植付杆１４等よりなる。１５は後輪９・９と田植装置１
０との間に設けられたレーキ状の整地具であって、軸１
６に回動自在に枢支されたコ字状フレーム１７にローリ
ング軸１８回りに回動自在に枢支されている。１９はバ
ネであって、該整地具１５のローリングを規制すべく設
けられている。２０は整地具１５より上方に向けて延出
された連杆であって、その上部はリンク機構１１の下部
リンク１１ａ・１１ａ間に設けられた軸２１に長穴２２
を介して連結されており、機体回向の時等に田植装置１
０をリンク機構１１にて上昇させると整地具１５も該連
杆２０により共に上昇される。Reference numeral 10 denotes a rice transplanting device mounted on the riding type traveling vehicle body 1 by a link mechanism 11 so as to be vertically movable, and includes a planting transmission case 12, a laterally reciprocating seedling tank 13, and a seedling planting rod 14. And so on. 15 is rear wheel 9 and 9 and rice transplanter 1
A rake-shaped leveling implement provided between the shaft 1 and
A U-shaped frame 17 rotatably supported by 6 is rotatably supported around a rolling shaft 18. A spring 19 is provided to regulate the rolling of the leveling implement 15. Reference numeral 20 denotes a connecting rod extending upward from the leveling tool 15, and an upper portion thereof is provided with a shaft 21 provided between the lower links 11a and 11a of the link mechanism 11 and an elongated hole 22.
The rice transplanter 1 is connected via the
When 0 is raised by the link mechanism 11, the leveling implement 15 is also raised by the connecting rod 20.
【０００９】２３・２４・２５は泥面を検出する接地検
出装置であって、左右の検出装置２３・２４は各々左右
最外側の苗植付杆１４・１４の前方に設けられており、
中央の検出装置２５は左右中央位置の苗植付杆１４の前
方に設けられている。そして、検出装置２３・２４・２
５は各々植付伝動ケース１２に設けられた軸２６に枢支
されバネ２７により弾圧されて泥面に軽く圧接する接地
部材２８と該接地部材の回動により作動されるスイッチ
Ｓａ・Ｓｂとによって構成されている。尚、田植装置１
０はローリング軸２９により左右ローリング自在に設け
られており、バネ３０・３０によってローリングが規制
されている。Reference numerals 23, 24 and 25 are ground contact detecting devices for detecting mud surfaces, and the left and right detecting devices 23 and 24 are provided in front of the left and right outermost seedling planting rods 14 and 14, respectively.
The central detection device 25 is provided in front of the rod 14 with seedlings at the center of the left and right. And the detection device 23/24/2
Reference numeral 5 denotes a grounding member 28 pivotally supported by a shaft 26 provided in the planted transmission case 12 and elastically pressed by a spring 27 to lightly contact the mud surface, and switches Sa and Sb operated by the rotation of the grounding member. It is configured. In addition, rice transplanter 1
0 is provided by a rolling shaft 29 so as to be able to roll right and left, and the rolling is restricted by springs 30.
【００１０】３１は田植装置１０を上下動させる昇降装
置であって、上記の検出装置２３・２４・２５にて切り
換えられる切換バルブ３１ａと該切換バルブ３１ａにて
供給及び排出される圧油により作動されてリンク機構１
１を上下揺動させる油圧シリンダー３１ｂ等により構成
されている。尚、油圧シリンダー３１ｂの基部は乗用型
走行車体１に枢着され、後端部がリンク機構１１の下部
リンク１１ａ・１１ａに軸着されている。Reference numeral 31 is an elevating device for moving the rice transplanting device 10 up and down, which is operated by a switching valve 31a switched by the detecting devices 23, 24, 25 and pressure oil supplied and discharged by the switching valve 31a. Link mechanism 1
It is composed of a hydraulic cylinder 31b for vertically swinging 1 and the like. The base of the hydraulic cylinder 31b is pivotally attached to the riding type traveling vehicle body 1, and the rear end is pivotally attached to the lower links 11a and 11a of the link mechanism 11.
【００１１】次に、第５図・第６図に基づいて、接地検
出装置２３・２４・２５の検出による田植装置１０の上
下動制御について述べる。R1はリレーであって、３個の
スイッチSaのうち２個以上のスイッチSaが接続(ON)され
たときに作動して、接点r1を接続せしめるべく設けられ
ている。そして、ソレノイドSOLH1は、接点r1が接続さ
れた時に作動し、昇降装置３１の切換バルブ３１ａをイ
方向に切換えて油圧シリンダー３１ｂ内の圧油をタンク
Ｔに戻し田植装置１０を下降せしめるべく設けられてい
る。また、Ｒ2もリレーであって、３個のスイッチSbの
うち２個以上のスイッチSbが接続(ON)されたときに作動
して、接点r2を接続せしめるべく設けられている。そし
て、ソレノイドSOLH2は、接点r2が接続された時に作動
し、昇降装置３１の切換バルブ３１ａをロ方向に切換え
て油圧シリンダー３１ｂに圧油を送り田植装置１０を上
昇せしめるべく設けられている。Next, based on FIGS. 5 and 6, the vertical movement control of the rice transplanter 10 by the detection of the ground contact detectors 23, 24, 25 will be described. R 1 is a relay, which is activated when two or more switches Sa among the three switches Sa are connected (ON), and is provided to connect the contact r 1 . Then, the solenoid SOLH 1 operates when the contact r 1 is connected, and switches the switching valve 31a of the lifting device 31 in the a direction to return the pressure oil in the hydraulic cylinder 31b to the tank T and lower the rice planting device 10. It is provided. Further, R 2 is also a relay and is provided so as to operate when two or more switches Sb among the three switches Sb are connected (ON) to connect the contact r 2 . The solenoid SOLH 2 is provided to operate when the contact point r 2 is connected, switch the switching valve 31a of the elevating device 31 in the B direction to send pressure oil to the hydraulic cylinder 31b, and raise the rice transplanting device 10. ..
【００１２】上記のように構成された田植装置１０を装
備した乗用型田植機を圃場にて各部を駆動せしめて前進
させると、田植作業が行なわれるのであるが、圃場の泥
面及び耕盤に局部的な凹凸があっても、左右両最外側位
置と中央位置との植付け位置の前方に設けた検出装置２
３・２４・２５のうち２個以上の検出装置が同じ検出を
行なった時のみ田植装置１０の昇降装置３１による上下
動制御を行なうべく構成してあるので、誤作動すること
なく苗植付深さ制御が適正に行なえる。When the riding type rice transplanter equipped with the rice transplanter 10 constructed as described above is moved forward by driving each part in the field, the rice transplanting work is performed. Even if there is local unevenness, the detection device 2 provided in front of the planting positions of the left and right outermost positions and the central position
Since the vertical movement control by the elevating device 31 of the rice planting device 10 is configured to be performed only when two or more detecting devices out of 3, 24, 25 perform the same detection, the seedling planting depth without malfunctioning. Control can be performed properly.
【００１３】また、このとき、乗用型走行車体１の駆動
後輪９・９の後方に苗植付け位置前方を整地する整地具
１５を昇降自在に配設し、田植装置１０を下降させた田
植作業時には自由に上下動できるように整地具１５を昇
降装置３１に連動させて設けたことにより、田植作業時
には整地具１５を田面に作用させて確実に整地作用させ
ることができ、検出装置２３…による泥面に対する田植
装置の位置の検出は高速の作業速度でも正確になり昇降
装置３１の作動制御が適正に行なえるので、高速の作業
速度でも良好な田植え作業が行なえる。At this time, a rice field planting work is carried out by arranging a soil leveling implement 15 for arranging the front of the seedling planting position forward of the rear drive wheels 9 of the riding type vehicle body 1 so that the rice planting device 10 is lowered. Since the ground leveling tool 15 is provided interlockingly with the elevating device 31 so that it can be moved up and down freely at times, the leveling tool 15 can be made to act on the rice field reliably during the rice planting work, and the detection device 23 ... The position of the rice planting device with respect to the mud surface can be accurately detected even at a high working speed, and the operation control of the lifting device 31 can be appropriately performed, so that a good rice planting work can be performed even at a high working speed.
【００１４】一方、畦際で機体を旋回させるとき、昇降
装置３１にて田植装置１０を所定以上に上昇させると整
地具１５も上動するので、機体旋回時に整地具１５によ
って泥土が押されて植付け苗の姿勢を乱したり押し倒し
たりすることがない。更に、整地具１５を昇降させる特
別な昇降機構がいらないので、構造が簡略で機体の軽量
な乗用型田植機となり走行性能が良くて良好な田植作業
が行える。On the other hand, when turning the body at the edge of the ridge, if the rice planting device 10 is raised above the predetermined level by the elevating device 31, the soil leveling tool 15 also moves upward, so that the soil leveling tool 15 pushes mud during the turning of the body. The posture of planted seedlings is not disturbed or pushed down. Furthermore, since no special lifting mechanism for lifting the leveling implement 15 is required, the riding type rice transplanter has a simple structure and a lightweight body, and the running performance is good and good rice transplanting work can be performed.
【図１】乗用型田植機の平面図[Figure 1] Plan view of a riding type rice transplanter
【図２】乗用型田植機の側面図[Figure 2] Side view of a riding rice transplanter
【図３】要部拡大側面図FIG. 3 is an enlarged side view of a main part.
【図４】要部拡大断面図FIG. 4 is an enlarged sectional view of an essential part.
【図５】昇降装置の作動を説明する電気回路図FIG. 5 is an electric circuit diagram for explaining the operation of the lifting device.
【図６】昇降装置の作動を説明する油圧回路図FIG. 6 is a hydraulic circuit diagram for explaining the operation of the lifting device.
１ 乗用型走行車体 ９ 駆動後輪 １０ 田植装置 １１ リンク機構 １５ 整地具 ２３ 検出装置 ２４ 検出装置 ２５ 検出装置 ３１ 昇降装置 DESCRIPTION OF SYMBOLS 1 Riding type vehicle body 9 Drive rear wheel 10 Rice transplanter 11 Link mechanism 15 Leveling tool 23 Detecting device 24 Detecting device 25 Detecting device 31 Lifting device
Claims (1)
ク機構１１を介して上下動自在に装着して、このリンク
機構１１を昇降装置３１により前記農用作業機の荷重を
支持すべく構成すると共に、前記田植装置１０に設けた
泥面に対する農用作業機の位置を検出する検出装置２３
…の検出信号により前記昇降装置３１の作動を制御すべ
く構成した乗用型田植機において、乗用型走行車体１の
駆動後輪９・９の後方に苗植付け位置前方を整地する整
地具１５を昇降自在に配設し、田植装置１０の所定以上
の上昇に伴って整地具１５が上動し、かつ、田植装置１
０を下降させた田植作業時には自由に上下動できるよう
に整地具１５を昇降装置３１に連動させて設けたことを
特徴とする乗用型田植機。1. A rice transplanter 10 is mounted on a riding type vehicle body 1 via a link mechanism 11 so as to be vertically movable, and the link mechanism 11 is configured to support a load of the agricultural work machine by an elevating device 31. At the same time, a detection device 23 for detecting the position of the agricultural work machine with respect to the mud surface provided in the rice transplanting device 10.
In the riding-type rice transplanter configured to control the operation of the lifting / lowering device 31 by the detection signal of ..., Elevating and lowering the leveling implement 15 for arranging the front of the seedling planting position behind the driving rear wheels 9, 9 of the riding-type traveling vehicle body 1. Arranged freely, the leveling implement 15 moves upward as the rice transplanter 10 rises above a predetermined level, and the rice transplanter 1
A riding type rice transplanter characterized in that a soil leveling implement 15 is provided in conjunction with an elevating device 31 so that it can be freely moved up and down during rice transplanting work in which 0 is lowered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4050200A JPH0771418B2 (en) | 1992-03-09 | 1992-03-09 | Riding rice transplanter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4050200A JPH0771418B2 (en) | 1992-03-09 | 1992-03-09 | Riding rice transplanter |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8714383A Division JPS59213310A (en) | 1983-05-17 | 1983-05-17 | Riding type agricultural work machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0576220A true JPH0576220A (en) | 1993-03-30 |
| JPH0771418B2 JPH0771418B2 (en) | 1995-08-02 |
Family
ID=12852491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4050200A Expired - Lifetime JPH0771418B2 (en) | 1992-03-09 | 1992-03-09 | Riding rice transplanter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0771418B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56157224A (en) * | 1980-05-09 | 1981-12-04 | Hitachi Ltd | Power factor improving device |
-
1992
- 1992-03-09 JP JP4050200A patent/JPH0771418B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56157224A (en) * | 1980-05-09 | 1981-12-04 | Hitachi Ltd | Power factor improving device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0771418B2 (en) | 1995-08-02 |
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