JPH0793847B2 - Riding rice transplanter - Google Patents
Riding rice transplanterInfo
- Publication number
- JPH0793847B2 JPH0793847B2 JP23186789A JP23186789A JPH0793847B2 JP H0793847 B2 JPH0793847 B2 JP H0793847B2 JP 23186789 A JP23186789 A JP 23186789A JP 23186789 A JP23186789 A JP 23186789A JP H0793847 B2 JPH0793847 B2 JP H0793847B2
- Authority
- JP
- Japan
- Prior art keywords
- rice transplanter
- seedling planting
- riding
- type rice
- planting device
- 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 - Lifetime
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は乗用型田植機における整地構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a leveling structure for a riding type rice transplanter.
乗用型田植機では機体の後部に苗植付装置が連結されて
いるので、走行用の車輪の跡が苗の植付けに影響を及ぼ
す場合がある。そこで、この車輪の跡を消す整地部材を
車輪の後方に昇降自在に配置し、この整地部材をバネ等
により接地側に付勢するか、又は整地部材の自重により
田面に接地させていく構造が提案されている。In the riding type rice transplanter, since the seedling planting device is connected to the rear part of the machine body, the traces of the wheels for traveling may affect the seedling planting. Therefore, there is a structure in which a ground leveling member that erases the traces of the wheel is vertically arranged behind the wheel, and the ground leveling member is biased toward the grounding side by a spring or the like, or is grounded on the rice field by the weight of the ground leveling member. Proposed.
このように整地部材を支持すると、植付走行中において
田面の凹凸に沿って整地部材が上下動して、田面の表面
が的確に整地されて行くのである。When the soil leveling member is supported in this manner, the soil leveling member moves up and down along the unevenness of the paddy field during traveling with planting, so that the surface of the paddy field is accurately leveled.
乗用型田植機では1回の植付行程が終了して枕地に達す
ると、苗植付装置を持ち上げるか又は苗植付装置を持ち
上げないで植付アームを田面より上方で停止させた状態
で、180°旋回して次の植付行程に入って行く。従っ
て、前述の構造ではこの枕地での旋回時においても、整
地部材による整地作用が期待できる。When the riding type rice transplanter completes one planting process and reaches the headland, either lift the seedling planting device or leave the planting arm above the rice field without raising the seedling planting device. , Turn 180 ° and enter the next planting process. Therefore, in the above-mentioned structure, the leveling action of the leveling member can be expected even when the headland is turned.
しかしながら、枕地での乗用型田植機は前輪の向きを大
きく変えて小半径で旋回する為に、枕地は非常に荒れ
る。そして、整地部材の自重又は接地側への付勢力は圃
場中央の比較的平坦な部分を対象に設定されている為
に、枕地での旋回時に行われる整地は十分とは言えな
い。従って、これより後に枕地に苗を植付ける場合に、
十分に枕地を整地しなければならず、その作業が煩わし
いものとなる。However, since the riding type rice transplanter in the headland changes the direction of the front wheels and turns in a small radius, the headland becomes very rough. Since the weight of the soil leveling member or the biasing force to the ground contact side is set for the relatively flat part in the center of the field, the leveling performed at the time of turning on the headland cannot be said to be sufficient. Therefore, when planting seedlings on the headland after this,
The headland must be leveled sufficiently, which makes the work troublesome.
本発明は、枕地での苗の植付作業の負担軽減を図ること
を目的としている。An object of the present invention is to reduce the burden of planting work of seedlings on a headland.
本発明の特徴は、 苗植付装置をアクチュエータにより昇降操作自在に
機体後部に連結し、走行用の車輪の後方に整地部材を昇
降自在に配置し、且つ、前記整地部材を接地側に付勢す
る付勢機構を備えてある乗用型田植機において、 植付クラッチの切り操作に連動して、前記付勢機構の付
勢力を強める手段を備えてあることにあり、 苗植付装置をアクチュエータにより昇降操作自在に
機体後部に連結し、走行用の車輪の後方に整地部材を昇
降自在に配置してある乗用型田植機において、 植付クラッチの切り操作に連動して、前記整地部材の所
定位置を越えての上昇動作を阻止する牽制手段を備えて
あることにあり、さらに、 苗植付装置を第1昇降機構を介して昇降操作自在に
機体後部に連結し、走行用の車輪の後方に配置された整
地部材を、第2昇降機構を介して機体後部に連結してあ
る乗用型田植機において、 植付クラッチの切り操作に連動して、前記整地部材の所
定位置を越えての上昇動作を阻止する牽制手段を備える
と共に、苗植付装置と整地部材とを連動連結して整地部
材が苗植付装置と一体で上昇可能とする連結機構を備え
てあることにあり、その作用及び効果は次のとおりであ
る。The feature of the present invention is that the seedling planting device is connected to the rear part of the machine body so that it can be moved up and down by an actuator, the ground leveling member is arranged rearward of the traveling wheel, and the ground leveling member is biased to the ground side. In the riding-type rice transplanter equipped with a biasing mechanism, the means for strengthening the biasing force of the biasing mechanism is provided in association with the disengagement operation of the planting clutch. In a riding-type rice transplanter, which is connected to the rear part of the machine body so that it can be moved up and down freely, and is equipped with a ground leveling member that can be moved up and down behind the traveling wheels, in conjunction with the disengagement operation of the planting clutch It is equipped with a restraining means for preventing the ascending motion beyond the upper part of the vehicle. Furthermore, the seedling planting device is connected to the rear part of the machine body so that it can be moved up and down through the first elevating mechanism, and the rear part of the wheel for traveling is connected. Place the ground leveling members The riding type rice transplanter connected to the rear part of the airframe through the second lifting mechanism is provided with a restraining means for interlocking with the disengagement operation of the planting clutch to prevent the raising operation of the ground leveling member beyond a predetermined position. At the same time, the seedling planting device and the ground leveling member are interlockingly connected to each other so that the ground leveling member can be integrally lifted with the seedling planting device, and the operation and effect thereof are as follows.
乗用型田植機では1回の植付行程が終了し枕地に達する
と、植付クラッチを切り操作して苗植付装置を停止させ
て旋回を行う。When the riding type rice transplanter completes one planting process and reaches the headland, the planting clutch is disengaged to stop the seedling planting device and make a turn.
従って、前項又はのように構成すると、枕地での旋
回時に整地部材が枕地面に強く押し付けられるのであ
り、又、枕地面の泥塊により整地部材が所定位置以上に
押し上げられようとしても整地部材は所定位置で止まる
為に、枕地での旋回時に整地が十分に行われる。Therefore, when configured as in the preceding paragraph or, the ground leveling member is strongly pressed against the headland when turning in the headland, and even if the ground leveling member is pushed up by a muddy mass on the headland to a predetermined position or more. Since it stops at a predetermined position, the ground is sufficiently leveled when turning on the headland.
そして、前項のように構成すると枕地での旋回時の整
地が十分に行われると共に、連結機構を連結状態として
おくと、苗植付装置を上方に持ち上げればこれに連動し
て整地部材も上方に持ち上げられるので、路上走行時等
に整地部材が邪魔になることはない。And if the configuration as described in the preceding paragraph is performed, leveling at the time of turning on the headland is sufficiently performed, and if the connection mechanism is in the connected state, if the seedling planting device is lifted upward, the leveling member also interlocks with this. Since it is lifted up, the ground leveling member does not get in the way when traveling on the road.
以上のように枕地での旋回時に整地を十分に行えるよう
になって、これより後に枕地に苗を植付ける場合に整地
を十分に行わなくてもよくなり、作業負担の軽減を図る
ことができた。又、この植付クラッチの切り操作は枕地
での旋回前に必ず行う操作である為、この操作を忘れて
しまうようなことも少ない。As described above, it becomes possible to perform sufficient leveling when turning in a headland, and when planting seedlings in the headland later, it is not necessary to perform leveling, and the work load should be reduced. I was able to. Moreover, since the disengagement operation of the planted clutch is always performed before turning in the headland, it is rare that the operation is forgotten.
そして、路上走行時等に整地部材が邪魔になるようなこ
ともない。Further, the ground leveling member does not become an obstacle when traveling on the road.
以下、本発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第1図に示すように植付ミッションケース(1)の後部
に植付アーム(2)、上部に苗のせ台(3)が備えられ
て苗植付装置(4)が構成されている。そして、機体後
部から延出された第1四連リンク機構(5)(第1昇降
機構に相当)の前後軸芯(P1)周りに、ローリング自在
に苗植付装置(4)が連結されると共に、苗のせ台
(3)の背面のガイド部材(6)と第1四連リンク機構
(5)の後部上端とに亘って、苗植付装置(4)をロー
リング操作するローリングシリンダ(7)が架設されて
いる。さらに、第1四連リンク機構(5)を昇降駆動す
る昇降シリンダ(8)(アクチュエータに相当)が取り
付けられている。As shown in FIG. 1, a planting arm (2) is provided at the rear of the planting mission case (1) and a seedling stand (3) is provided at the upper part of the planting mission case (1) to form a planting apparatus (4). Then, the seedling planting device (4) is connected in a rolling manner around the front-rear axis (P 1 ) of the first four-link mechanism (5) (corresponding to the first lifting mechanism) extended from the rear part of the machine body. In addition, the rolling cylinder (7) for rolling the seedling planting device (4) over the guide member (6) on the back surface of the seedling stand (3) and the rear upper end of the first four-link mechanism (5). ) Has been installed. Further, an elevating cylinder (8) (corresponding to an actuator) that elevates and drives the first four-link mechanism (5) is attached.
この苗植付装置(4)は第1図に示すように、植付ミッ
ションケース(1)の下部左右に一対の高さセンサー
(9R),(9L)を備えており、この高さセンサー(9
R),(9L)の構造について詳述する。第2図に示すよ
うに、植付ミッションケース(1)から前方に突出した
フレーム(10)の横軸芯(P2)周りに、上下揺動自在に
揺動部材(11)が支持され、この揺動部材(11)の前後
軸芯(P3)周りにローリング自在にソリ状の接地板(1
2)が取り付けられている。そして、接地板(12)を植
付ミッションケース(1)と平行な姿勢に付勢するスプ
リング(13)が取り付けられている。As shown in FIG. 1, this seedling planting device (4) is equipped with a pair of height sensors (9R) and (9L) on the lower left and right sides of the planting mission case (1). 9
The structures of R) and (9L) will be described in detail. As shown in FIG. 2, a swing member (11) is swingably supported around a horizontal axis (P 2 ) of a frame (10) protruding forward from the planted mission case (1), A sled-like ground plate (1) that can be freely rolled around the front-rear axis (P 3 ) of the swing member (11).
2) is installed. Then, a spring (13) for urging the ground plate (12) in a posture parallel to the planted mission case (1) is attached.
そして、田面(G)に接地追従して行く接地板(12)の
上下角度が、アーム(14)を介してポテンショメータ
(15)により検出される。これにより、左右の接地板
(12)の上下角度の差が無くなるようにローリンクシリ
ンダ(7)が伸縮操作されて、苗植付装置(4)が田面
(G)と平行な姿勢に維持される。そして、左右の接地
板(12)の上下角度の平均値が設定値となるように昇降
シリンダ(8)が伸縮操作されて、苗植付装置(4)が
田面(G)から設定高さに維持されるのである。Then, the vertical angle of the ground plate (12) that follows the ground contact with the rice field (G) is detected by the potentiometer (15) via the arm (14). As a result, the low link cylinder (7) is expanded and contracted so that there is no difference in the vertical angle between the left and right ground plates (12), and the seedling planting device (4) is maintained in a posture parallel to the rice field (G). It Then, the lifting cylinder (8) is expanded and contracted so that the average value of the vertical angles of the left and right ground plates (12) becomes the set value, and the seedling planting device (4) is moved from the rice field (G) to the set height. It will be maintained.
次に、整地構造について詳述する。第1図に示すように
機体後部下方に第2四連リンク機構(16)(第2昇降機
構に相当)が昇降自在に連結されており、この第2四連
リンク機構(16)の後端には、整地板(17)(整地部材
に相当)及び棒状のレーキ(18)(整地部材に相当)
が、後輪(19)の後方に位置するように取り付けられて
いる。そして、この第2四連リンク機構(16)を下方側
に付勢するスプリング(20)(付勢機構に相当)が備え
られている。Next, the leveling structure will be described in detail. As shown in FIG. 1, a second quadruple link mechanism (16) (corresponding to a second elevating mechanism) is movably connected to the lower rear part of the machine body, and a rear end of the second quadruple link mechanism (16). Includes leveling plate (17) (corresponding to leveling member) and rod-shaped rake (18) (corresponding to leveling member)
Is mounted so as to be located behind the rear wheel (19). A spring (20) (corresponding to a biasing mechanism) that biases the second four-link mechanism (16) downward is provided.
これに対し第1図に示すように、苗植付装置(4)への
動力を入切操作する植付クラッチ(図示せず)操作用の
植付クラッチレバー(21)が備えられている。そして、
この植付クラッチレバー(21)とスプリング(20)とが
ワイヤ(22)を介して連結されている。これにより、枕
地での旋回時等に植付クラッチレバー(21)を切り側に
操作すると、ワイヤ(22)が植付クラッチレバー(21)
側に引かれて、スプリング(20)の付勢力が強められる
のである。On the other hand, as shown in FIG. 1, a planting clutch lever (21) for operating a planting clutch (not shown) for turning on and off power to the seedling planting device (4) is provided. And
The planted clutch lever (21) and the spring (20) are connected via a wire (22). This allows the wire (22) to move the planting clutch lever (21) when the planting clutch lever (21) is operated to the cut side during turning in a headland.
The urging force of the spring (20) is strengthened by being pulled to the side.
この実施例では整地板(17)及びレーキ(18)を機体後
部に連結しているが、これらの苗植付装置(4)に連結
してもよい。この場合、枕地での旋回時には植付アーム
(2)を田面(G)から上方に位置させて植付クラッチ
を切り操作すると共に、苗植付装置(4)を上方に持ち
上げないで旋回を行う。In this embodiment, the ground leveling plate (17) and the rake (18) are connected to the rear part of the machine body, but they may be connected to these seedling planting devices (4). In this case, at the time of turning in the headland, the planting arm (2) is located above the rice field (G) to disengage the planting clutch, and the seedling planting device (4) is not lifted to turn. To do.
第3図に示す構造では、整地板(17)及びレーキ(18)
を備えた第2四連リンク機構(16)を、下方側に付勢す
るスプリング(第1図のスプリング(20)に相当)を取
り付けずに、、第2四連リンク機構(16)及び整地板
(17),レーキ(18)等の自重で、整地板(17)及びレ
ーキ(18)を接地させるようにしている。この場合、第
2四連リンク機構(16)が下降し過ぎないように、これ
を持ち上げる付勢力の弱いスプリング(23)(連結機構
に相当)を、第1四連リンク機構(5)と第2四連リン
ク機構(16)とに亘って架設している。In the structure shown in FIG. 3, the leveling plate (17) and the rake (18) are used.
The second quadruple link mechanism (16) and the aligner without adjusting the spring (corresponding to the spring (20) in FIG. 1) for urging the second quadruple link mechanism (16). The ground plate (17) and the rake (18) are grounded by the weight of the ground plate (17) and the rake (18). In this case, a spring (23) (corresponding to a connecting mechanism) having a weak biasing force that lifts up the second four-link mechanism (16) and the first four-link mechanism (5) is used to prevent the second four-link mechanism (16) from descending too much. Two quadruple link mechanisms (16) are installed.
そして、機体後部に固定されているフレーム(24)の横
軸芯(P4)周りにフック部材(25)(牽制手段に相当)
が揺動自在に支持され、このフック部材(25)を揺動操
作するソレノイド(26)が取り付けられている。これに
より、植付クラッチレバー(21)を切り側に操作する
と、ソレノイド(26)によりフック部材(25)が揺動操
作されて第2四連リンク機構(16)の第1ピン(16a)
に係合する。従って、第2四連リンク機構(16)及び整
地板(17),レーキ(18)等が、所定位置より上方に持
ち上げられるのが止められるのである。Then, the hook member (25) (corresponding to the restraint means) around the horizontal axis (P 4 ) of the frame (24) fixed to the rear part of the machine body.
Is swingably supported, and a solenoid (26) for swinging the hook member (25) is attached. As a result, when the planted clutch lever (21) is operated to the disengagement side, the hook member (25) is rocked by the solenoid (26), and the first pin (16a) of the second four-link mechanism (16).
Engage with. Therefore, the second quadruple link mechanism (16), the leveling plate (17), the rake (18), etc. can be stopped from being lifted above the predetermined position.
そして、この乗用型田植機では走行用の変速装置(図示
せず)が前進2段後進1段に変速操作可能に構成されて
おり、この変速装置用の変速レバー(27)を前進2速位
置(F2)(路上での高速走行用)又は後進位置(R)に
操作すると(前進1速位置(F1)は植付走行用)、植付
クラッチレバー(21)の操作位置に関係なく、フック部
材(25)が第1ピン(16a)から外れる位置に操作され
る。In this riding type rice transplanter, a speed change device (not shown) for traveling is configured to be able to perform a speed change operation of two forward speeds and one reverse speed, and the speed change lever (27) for the speed changer is set to the second forward speed position. (F 2 ) (for high speed running on the road) or when operating in the reverse position (R) (first forward speed position (F 1 ) for running with planting), regardless of the operating position of the planted clutch lever (21) , The hook member (25) is operated to a position where it disengages from the first pin (16a).
従って、この状態で苗植付装置(4)を上方に持ち上げ
操作するとスプリング(23)の付勢力で、第2四連リン
ク機構(16)及び整地板(17),レーキ(18)等が一緒
に持ち上げ操作されるのである。又、第1四連リンク機
構(5)には長孔(28a)付きのガイド板(28)が取り
付けられ、このガイド板(28)の長孔(28a)に、第2
四連リンク機構(16)の第2ピン(16b)が係入されて
いる。これにより、第2四連リンク機構(16)の横振れ
等を抑えている。Therefore, when the seedling planting device (4) is lifted up in this state, the second quadruplet link mechanism (16), the ground leveling plate (17), the rake (18), etc. are put together by the urging force of the spring (23). It is lifted up to. A guide plate (28) with an elongated hole (28a) is attached to the first four-link mechanism (5), and a second plate is attached to the elongated hole (28a) of the guide plate (28).
The second pin (16b) of the four-link mechanism (16) is engaged. As a result, lateral runout of the second quadruple link mechanism (16) is suppressed.
尚、特許請求の範囲の項に図面との対象を便利にする為
に符号を記すが、該記入により本発明は添付図面の構造
に限定されるものではない。It should be noted that reference numerals are added to the claims for convenience of the drawing, but the present invention is not limited to the structure of the accompanying drawings by the entry.
図面は本発明に係る乗用型田植機の実施例を示し、第1
図は乗用型田植機の後半部の側面図、第2図は高さセン
サーの側面図、第3図は別実施例における乗用型田植機
の後半部の側面図である。 (4)……苗植付装置、(5)……第1昇降機構、
(8)……アクチュエータ、(16)……第2昇降機構、
(17),(18)……整地部材、(19)……走行用の車
輪、(20)……付勢機構、(23)……連結機構、(25)
……牽制手段。The drawings show an embodiment of a riding-type rice transplanter according to the present invention.
The figure is a side view of the rear half of the riding type rice transplanter, FIG. 2 is a side view of the height sensor, and FIG. 3 is a side view of the rear half of the riding type rice transplanter in another embodiment. (4) …… Seedling planting device, (5) …… First lifting mechanism,
(8) …… Actuator, (16) …… Second lifting mechanism,
(17), (18) …… Leveling member, (19) …… Wheels for traveling, (20) …… Biasing mechanism, (23) …… Coupling mechanism, (25)
…… A restraint means.
Claims (3)
により昇降操作自在に機体後部に連結し、走行用の車輪
(19)の後方に整地部材(17),(18)を昇降自在に配
置し、且つ、前記整地部材(17),(18)を接地側に付
勢する付勢機構(20)を備えてある乗用型田植機であっ
て、 植付クラッチの切り操作に連動して、前記付勢機構(2
0)の付勢力を強める手段を備えてある乗用型田植機。1. A seedling planting device (4) comprising an actuator (8).
Is connected to the rear part of the machine body so that it can be moved up and down freely, and the ground leveling members (17) and (18) are arranged rearwardly of the traveling wheel (19) so that the ground leveling members (17) and (18) can be moved up and down. A riding-type rice transplanter equipped with a biasing mechanism (20) for biasing to the ground side, wherein the biasing mechanism (2
0) A riding-type rice transplanter equipped with a means for strengthening the urging force of 0).
により昇降操作自在に機体後部に連結し、走行用の車輪
(19)の後方に整地部材(17),(18)を昇降自在に配
置してある乗用型田植機であって、 植付クラッチの切り操作に連動して、前記整地部材(1
7),(18)の所定位置を越えての上昇動作を阻止する
牽制手段(25)を備えてある乗用型田植機。2. A seedling planting device (4) for an actuator (8)
It is a riding-type rice transplanter in which the grounding members (17) and (18) are arranged so as to be able to move up and down by being connected to the rear part of the machine body by the The ground leveling member (1
A riding type rice transplanter equipped with a restraining means (25) for preventing the ascending movements of 7) and (18) beyond a predetermined position.
介して昇降操作自在に機体後部に連結し、走行用の車輪
(19)の後方に配置された整地部材(17),(18)を、
第2昇降機構(16)を介して機体後部に連結してある乗
用型田植機であって、 植付クラッチの切り操作に連動して、前記整地部材(1
7),(18)の所定位置を越えての上昇動作を阻止する
牽制手段(25)を備えると共に、苗植付装置(4)と整
地部材(17),(18)とを連動連結して整地部材(1
7),(18)が苗植付装置(4)と一体で上昇可能とす
る連結機構(23)を備えてある乗用型田植機。3. A soil leveling member (17) arranged behind a traveling wheel (19), wherein a seedling planting device (4) is connected to a rear part of the machine body via a first elevating mechanism (5) so as to be vertically movable. ), (18)
A riding type rice transplanter connected to a rear part of a body via a second lifting mechanism (16), wherein the leveling member (1
7), (18) is provided with a restraining means (25) for preventing the ascending movement beyond a predetermined position, and the seedling planting device (4) and the ground leveling members (17), (18) are linked together. Leveling material (1
A riding-type rice transplanter in which 7) and (18) are equipped with a connecting mechanism (23) that can be raised together with the seedling planting device (4).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23186789A JPH0793847B2 (en) | 1989-09-06 | 1989-09-06 | Riding rice transplanter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23186789A JPH0793847B2 (en) | 1989-09-06 | 1989-09-06 | Riding rice transplanter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0394607A JPH0394607A (en) | 1991-04-19 |
JPH0793847B2 true JPH0793847B2 (en) | 1995-10-11 |
Family
ID=16930264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23186789A Expired - Lifetime JPH0793847B2 (en) | 1989-09-06 | 1989-09-06 | Riding rice transplanter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0793847B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010046007A (en) * | 2008-08-21 | 2010-03-04 | Mitsubishi Agricult Mach Co Ltd | Transplanter |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4502107B2 (en) * | 2003-03-14 | 2010-07-14 | 井関農機株式会社 | Passenger rice transplanter |
JP6624238B2 (en) * | 2018-05-21 | 2019-12-25 | 井関農機株式会社 | Transplant machine |
-
1989
- 1989-09-06 JP JP23186789A patent/JPH0793847B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010046007A (en) * | 2008-08-21 | 2010-03-04 | Mitsubishi Agricult Mach Co Ltd | Transplanter |
Also Published As
Publication number | Publication date |
---|---|
JPH0394607A (en) | 1991-04-19 |
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