JPS6314574Y2 - - Google Patents
Info
- Publication number
- JPS6314574Y2 JPS6314574Y2 JP1981066840U JP6684081U JPS6314574Y2 JP S6314574 Y2 JPS6314574 Y2 JP S6314574Y2 JP 1981066840 U JP1981066840 U JP 1981066840U JP 6684081 U JP6684081 U JP 6684081U JP S6314574 Y2 JPS6314574 Y2 JP S6314574Y2
- Authority
- JP
- Japan
- Prior art keywords
- tool
- backfilling
- seeding
- ground
- leveling tool
- 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
- 238000010899 nucleation Methods 0.000 claims description 35
- 239000002689 soil Substances 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 11
- 238000009331 sowing Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 description 6
- 241000209094 Oryza Species 0.000 description 4
- 235000007164 Oryza sativa Nutrition 0.000 description 4
- 235000009566 rice Nutrition 0.000 description 4
- 230000003028 elevating effect Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035784 germination Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000004343 Calcium peroxide Substances 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 241000647276 Sparganium natans Species 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 description 1
- 235000019402 calcium peroxide Nutrition 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000007226 seed germination Effects 0.000 description 1
Description
【考案の詳細な説明】
本考案は、地面に播種用凹溝を形成するための
凸部をその下面に形成した整地具と、前記播種用
凹部への播種機構及び、播種後において前記播種
用凹溝に土壌を埋戻す埋戻し具とを備えた播種装
置を走行機体に連結支持させてある湛水圃場用播
種機に関する。[Detailed Description of the Invention] The present invention provides a ground leveling tool having a convex portion formed on the lower surface thereof for forming a concave groove for sowing on the ground, a mechanism for sowing the sowing into the concave portion for sowing, and The present invention relates to a seeding machine for flooded fields, in which a seeding device equipped with a backfilling tool for backfilling soil into a groove is connected and supported by a traveling machine body.
従来のこの種の湛水圃場用播種機においては、
実開昭55−25482号公報に開示の技術に示される
如く、埋戻し具としての培土板が整地具としての
フロートの下面後部寄り位置に付設されていた
が、これによるときは、溝形成抵抗及び埋戻し抵
抗が整地具に加味されるから、泥土の硬軟によつ
て、整地具が受ける抵抗変化が大きく、つまり、
泥土の硬軟によつて、溝形成抵抗及び埋戻し抵抗
も変化するから、泥土の硬軟によつて、整地具が
受ける抵抗変化が大きくなり、従つて、整地具の
接地圧を泥土の硬質に適したものに設定しておく
と、泥土が軟質である場合に整地具が大きく沈ん
だり、これとは反対に、整地具の接地圧を泥土の
軟質に適したものに設定しておくと、泥土が硬質
である場合に整地具が余り沈み込まず、泥面から
の溝形成深さにむらが生じると言つた欠点があつ
た。又、溝形成用の凸部と溝埋戻し用の埋戻し具
を整地具に一体的に設けたものでは、整地具の大
きさの関係から、溝形成用の凸部と、溝埋戻し具
とを十分に離して設けることができず、従つて、
整地作用を受けている泥土や整地作用を受けた直
後の、未だ流動状態にある泥土に対して埋戻し具
が作用することとなるから、埋戻し作用が一定化
せず、埋戻し泥土が量的に過不足し易く、発芽不
良等を招来し易い欠点があつた。 In this type of conventional seeding machine for flooded fields,
As shown in the technique disclosed in Japanese Utility Model Application Publication No. 55-25482, a soil plate serving as a backfilling tool was attached to a position near the rear of the lower surface of a float serving as a leveling tool. Since the backfill resistance and backfill resistance are taken into account in the leveling tool, the resistance change that the leveling tool receives is large depending on the hardness and softness of the mud.
Since groove formation resistance and backfilling resistance change depending on the hardness of the mud, the resistance change that the ground leveling tool receives increases depending on the hardness and softness of the mud. If the ground leveling tool is set to a value suitable for the soft mud, the ground leveling tool may sink significantly when the mud is soft.On the other hand, if the ground leveling tool's ground pressure is set to a value suitable for the soft mud, the soil leveling tool may sink significantly. When the soil is hard, the leveling tool does not sink very much, resulting in uneven groove formation depth from the mud surface. In addition, in the case where the protrusion for forming grooves and the backfilling tool for backfilling grooves are integrally provided on the ground leveling tool, due to the size of the leveling tool, the protrusion for forming grooves and the backfilling tool for groove backfilling It is not possible to provide a sufficient distance between the
Since the backfilling tool acts on the mud that has undergone the leveling action or the mud that is still in a fluid state immediately after the leveling action, the backfilling action is not constant and the amount of backfill mud is The problem was that it was easy to have too much or too little of the seeds, leading to poor germination.
本考案は、斯かる点に鑑みて、整地具と埋戻し
具との配置工夫といつた簡単な改良をもつて、上
記欠点を解消することを目的とする。 In view of these points, the present invention aims to eliminate the above-mentioned drawbacks by making simple improvements such as improving the arrangement of the ground leveling tool and the backfilling tool.
上記目的を解消する為の本考案の特徴構成は、
前記播種溝形成用の凸部を備えた整地具と、前記
播種溝埋戻し用の埋戻し具とを別体に形成して、
前記埋戻し具を前記整地具に対して相対的に上下
揺動可能に、且つ、地面側に付勢して設けるとと
もに、前記埋戻し具には、平面視並びに正面視に
おいてハの字形に配置された左右一対の土寄せ面
と、泥面に接して前記左右一対の土寄せ面の沈降
方向への移動に抵抗を与える平坦な規制面とを設
け、さらに、前記埋戻し具は、前記整地具に対し
て、整地具による整地作用を受けて安定静置状態
にある泥土に対して埋戻し作用を行わせることが
できるように、前後方向に十分な間隔を隔てて設
けた点にあり、斯かる構成から次の作用効果を奏
する。 The characteristic structure of this invention to solve the above purpose is as follows:
The soil leveling tool having a convex part for forming the seeding groove and the backfilling tool for backfilling the seeding groove are formed separately,
The backfilling tool is provided so as to be able to swing up and down relative to the ground leveling tool and biased toward the ground side, and the backfilling tool is arranged in a V-shape in a plan view and a front view. a pair of left and right earth-filling surfaces, and a flat regulating surface that is in contact with the mud surface and provides resistance to the movement of the left and right earth-filling surfaces in the sedimentation direction; On the other hand, in order to be able to perform a backfilling action on muddy soil that is in a stable state after being leveled by the ground leveling tool, the ground leveling tools are provided at sufficient intervals in the front and back direction. The structure provides the following effects.
すなわち、溝形成用の凸部を備えた整地具と、
溝埋戻し用の埋戻し具とを別体に構成して分けた
から、整地具には、溝形成抵抗のみが作用して、
埋戻し抵抗が作用しないから、泥土の硬軟によつ
て整地具に作用する抵抗変化が少なく、従つて、
泥土の硬軟による整地具の上下変化が小さくなく
て、泥面から均一深さの溝の成形が可能となる。
さらに、溝形成用の凸部を備えた整地具と、溝埋
戻し用の埋戻し具とは別体だから、整地具に対し
て埋戻し具を十分に間隔を離して設けることがで
き、これによつて、整地具による整地作用を受け
て安定静置状態にある泥土に対して埋戻し作用を
行わせることができるから、埋戻し具と整地具と
の配置工夫と言つた簡単な構造改良をもつて、埋
戻し具による埋戻し作用をほぼ一様化することが
できる。しかも、埋戻し具には、左右一対の土寄
せ面が一定以上泥中に沈降することを阻止する左
右一対の平坦な規制面を設けて、埋戻し具を泥面
に追従させるべく構成してあるから、より均一な
埋戻し作用が行え、もつて、湛水圃場での種子の
出芽、発芽を良好なものにできる。 That is, a ground leveling tool equipped with a convex part for forming grooves;
Since the backfilling tool for trench backfilling and the trench backfilling tool are configured and separated, only the trench forming resistance acts on the ground leveling tool.
Since there is no backfilling resistance, there is little change in the resistance that acts on the leveling tool depending on the hardness or softness of the mud.
The vertical change of the leveling tool due to the hardness and softness of the mud is not small, making it possible to form grooves of uniform depth from the mud surface.
Furthermore, because the ground leveling tool with the convex part for forming grooves and the backfilling tool for backfilling grooves are separate, the backfilling tool can be installed with a sufficient distance from the ground leveling tool. By using this method, it is possible to backfill the mud that is in a stable state due to the leveling action of the ground leveling tool, so simple structural improvements such as improving the arrangement of the backfilling tool and the leveling tool can be carried out. With this, the backfilling effect of the backfilling tool can be made almost uniform. In addition, the backfilling tool is configured to have a pair of flat regulating surfaces on the left and right that prevent the left and right levee surfaces from sinking into the mud beyond a certain level, so that the backfilling tool follows the mud surface. Therefore, more uniform backfilling action can be performed, which in turn can improve seed germination and germination in flooded fields.
以下、本考案の実施例を図面に基づいて説明す
ると、原動装置１、走行車輪２群、運転部３を備
えた乗用走行本機４の後部に三点リンク機構５を
介して駆動昇降可能に支持させた枠６に、複数
（図面は６つを示す。）の播種装置７…を横方向に
一定間隔を隔てて装備したフレーム８を、左右一
対のリンク９，９を介してローリング可能に吊下
げ支持させてある湛水圃場用播種機であつて、前
記各播種装置７…夫々は、その下面をもつて泥面
（地面）を整地し、かつ、その下面に、機体走行
に伴ない泥面に播種用凹溝ａを形成するための作
溝用凸部１０が付設された板状の整地具１１を、
前記凹溝ａへの播種機構Ａ及び播種後の前記凹溝
ａに泥土を埋戻す埋戻し具１５とを、前記昇降フ
レーム８に各別に取付けた播種フレーム１６…に
組付けて構成されている。 Hereinafter, an embodiment of the present invention will be described based on the drawings. A passenger traveling main body 4, which is equipped with a prime mover 1, two groups of traveling wheels, and a driving section 3, is capable of being driven up and down via a three-point linkage mechanism 5 at the rear of the vehicle. A frame 8 equipped with a plurality of seeding devices 7 (six shown in the drawing) at regular intervals in the horizontal direction is mounted on a supported frame 6, and can be rolled through a pair of left and right links 9, 9. It is a seeding machine for flooded fields that is suspended and supported, and each of the seeding devices 7 level the mud surface (ground) with its lower surface, and has a seeding device attached to the lower surface as the machine moves. A plate-shaped ground leveling tool 11 is provided with a groove forming convex portion 10 for forming a seeding groove a on the mud surface.
It is constructed by assembling a seeding mechanism A into the groove a and a backfilling tool 15 for backfilling mud into the groove a after sowing to a seeding frame 16 separately attached to the lifting frame 8. .
前記の播種機構Ａは、種籾タンク１２と、この
タンク１２内の種籾を定量繰出しするロール１３
及び、繰出し種籾を前記凹溝ａに落下案内するガ
イド１４とから構成されている。 The sowing mechanism A includes a rice seed tank 12 and a roll 13 that feeds out a fixed amount of rice seeds in the tank 12.
and a guide 14 that guides the delivered seed rice to fall into the groove a.
前記埋戻し具１５は、前記整地具１１に対して
後方に十分な間隔Ｌを隔てて設けられるととも
に、平面視並びに正面視においてハの字形に配置
された左右一対の土寄せ面１５ａ，１５ａと上下
からの土押え面１５ｂ，ｃとを備え、かつ、スプ
リングＳを介して接地方向に揺動付勢されてい
る。前記土寄せ面１５ａ，１５ａの最小対向間隔
L1は、前記凸部１０の巾L2よりも大に構成され
ている。 The backfilling tool 15 is provided at a sufficient distance L from the rear of the ground leveling tool 11, and is located above and below a pair of left and right backfilling surfaces 15a, 15a arranged in a V-shape in plan view and front view. It is provided with soil holding surfaces 15b and 15c from above, and is biased to swing in the direction of contact with the ground via a spring S. Minimum opposing distance between the earthing surfaces 15a, 15a
L 1 is configured to be larger than the width L 2 of the convex portion 10 .
かつ、前記各播種装置７…は夫々、それらの播
種フレーム１６…を前記昇降フレーム８に平行四
連リンク機構１７…を介して取付けることによ
り、昇降フレーム８に対して各々独立的に上下移
動自在に構成され、前記各平行四連リンク機構１
７…と昇降フレーム８との間には、播種装置７…
に自重による下降力よりも小なる上昇力を付与す
る弾性手持用スプリング１８…が介装されてい
る。つまり、各播種装置７…は、それら接地具１
１…の接地圧変化に応動して上下に移動すべく構
成されている。尚、前記播種装置７…のうち、中
央二つのものは、それらの播種フレーム１６，１
６同志を板材１９を介して固着連結することによ
り、一体的に上下移動すべく構成されている。
又、各接地具１１…は、播種フレーム１６…に上
下位置変更固定自在に取付けられ、その上下位置
変更手段は、取付ボルト２０…に対するボルト孔
２１…を上下方向の長孔に構成する手段である。 In addition, each of the seeding devices 7 can independently move up and down with respect to the lifting frame 8 by attaching their seeding frames 16 to the lifting frame 8 via parallel quadruple link mechanisms 17. Each of the parallel quadruple link mechanisms 1
7... and the lifting frame 8, there is a seeding device 7...
An elastic hand-held spring 18 is interposed to provide an upward force smaller than the downward force due to its own weight. In other words, each seeding device 7...
1... is configured to move up and down in response to changes in ground pressure. Incidentally, among the seeding devices 7..., the two central ones are connected to their seeding frames 16, 1.
By firmly connecting the six members through a plate 19, they are configured to move up and down as one unit.
Further, each grounding tool 11 is attached to the seeding frame 16 so as to be able to change and fix its vertical position, and the means for changing the vertical position is a means for configuring the bolt holes 21 for the mounting bolts 20 as long holes in the vertical direction. be.
前記繰出しロール１３…群に対する回転付与機
構は、前記昇降フレーム８に、軸２２Ａを介して
一体回転状態に連動する左右一対の接地転動軸２
２，２２を、前記播種装置７…群の左右両横外部
に位置する状態で装備させるとともに、前記播種
装置７…のうち、左右一側に位置するものの繰出
しロール１３を前記連動軸２２Ａとをチエーン２
３を介して連動連結し、かつ、前記繰出しロール
１３…の隣接するもの同志を軸２４…を介して連
動連結し、もつて、機体走行に伴なう接地転動軸
２２，２２対の転動回転をもつて、繰出しロール
１３…を同期回転させるべく構成されている。
尚、前記連動軸２４…のうち、中央二つの繰出し
ロール１３，１３の連動軸２２以外のものは屈折
により隣接する播種装置７，７…の一定範囲内で
の相対上下移動を許容すべく、ユニバーサルジヨ
イント２５…を備えている。 The rotation imparting mechanism for the group of feed rolls 13 includes a pair of left and right ground rolling shafts 2 that are interlocked with the elevating frame 8 in an integrally rotating state via a shaft 22A.
2, 22 are installed so as to be located outside the left and right sides of the group of seeding devices 7, and the feed roll 13 of the seeding device 7 located on one of the left and right sides is connected to the interlocking shaft 22A. chain 2
3, and adjacent ones of the feed rolls 13 are interlocked and connected via shafts 24, and thus the rotation of the pair of ground rolling shafts 22, 22 as the aircraft travels. The feed rolls 13 are configured to rotate synchronously with dynamic rotation.
Incidentally, among the interlocking shafts 24..., those other than the interlocking shafts 22 of the central two feed-out rolls 13, 13 are bent to allow relative vertical movement of the adjacent seeding devices 7, 7... within a certain range. Equipped with universal joint 25.
前記昇降フレーム８の駆動昇降機構２６は、前
記三点リンク機構５を駆動上下揺動する油圧シリ
ンダであつて、これは、その切替弁２７を、前記
中央二つの播種装置７，７…の接地圧変化による
上下移動に連動して切替作動させるワイヤー２８
を設け、もつて、前記中央播種装置７，７の接地
具１１，１１の接地圧が設定範囲内に維持される
高さ位置にフレーム８が昇降位置するように自動
作動すべく構成されている。図中２９は接地圧設
定用スプリングであり、これは、本機４に装着の
レバー３０を介して遠隔操作されるものである。
３１は前記フレーム８に装備させた整地具であ
る。 The driving elevating mechanism 26 of the elevating frame 8 is a hydraulic cylinder that drives the three-point linkage mechanism 5 and swings it up and down. Wire 28 that switches and operates in conjunction with vertical movement due to pressure changes
is provided, and is configured to automatically operate so that the frame 8 is raised and lowered to a height position where the ground pressure of the grounding tools 11, 11 of the central seeding devices 7, 7 is maintained within a set range. . In the figure, reference numeral 29 denotes a ground pressure setting spring, which is remotely operated via a lever 30 attached to the machine 4.
Reference numeral 31 represents a ground leveling tool mounted on the frame 8.
尚、種籾としては、酸素発生剤がコーテイング
されたものを用いることが望ましい。前記酸素発
生剤としては、過酸化カルシウムを主成分とする
過酸化石灰を挙げることができる。 Note that it is desirable to use seed rice coated with an oxygen generating agent. Examples of the oxygen generating agent include lime peroxide containing calcium peroxide as a main component.
図面は本考案に係る湛水圃場用播種機の実施例
並びに左右一対の土寄せ面１５ａ，１５ａが一定
以上泥中に沈降することを阻止する左右一対の平
坦な規制面１５ｃ，１５ｃを示し、第１図は側面
図、第２図は要部の拡大平面図、第３図は要部の
一部切欠き拡大側面図、第４図は第３図−線
での断面図、第５図は要部の拡大縦断側面図、第
６図は要部の拡大斜視図である。
１０……凸部、１１……整地具、Ａ……播種機
構、１５……埋戻し具、７……播種装置、４……
走行機体、１５ａ……土寄せ面、１５ｂ……土押
え面。
The drawings show an embodiment of the seeding machine for flooded fields according to the present invention, and a pair of left and right flat regulating surfaces 15c, 15c that prevent the left and right pair of soil bundling surfaces 15a, 15a from settling in the mud beyond a certain level. Fig. 1 is a side view, Fig. 2 is an enlarged plan view of the main part, Fig. 3 is an enlarged partially cutaway side view of the main part, Fig. 4 is a cross-sectional view taken along the line - Fig. 3, and Fig. 5 is an enlarged plan view of the main part. FIG. 6 is an enlarged longitudinal sectional side view of the main part, and FIG. 6 is an enlarged perspective view of the main part. DESCRIPTION OF SYMBOLS 10... Convex part, 11... Ground leveling tool, A... Seeding mechanism, 15... Backfill tool, 7... Seeding device, 4...
Traveling body, 15a... earth pressing surface, 15b... earth pressing surface.
Claims (1)
をその下面に形成した整地具１１と、前記播種用
凹部ａへの播種機構Ａ及び、播種後において前記
播種用凹溝ａに土壌を埋戻す埋戻し具１５とを備
えた播種装置７を走行機体４に連結支持させてあ
る湛水圃場用播種機において、前記播種溝形成用
の凸部１０を備えた整地具１１と、前記播種溝埋
戻し用の埋戻し具１５とを別体に形成して、前記
埋戻し具１５を前記整地具１１に対して相対的に
上下揺動可能に、且つ、地面側に付勢して設ける
とともに、前記埋戻し具１５には、平面視並びに
正面視においてハの字形に配置された左右一対の
土寄せ面１５ａ，１５ａと、泥面に接して前記左
右一対の土寄せ面１５ａ，１５ａの沈降方向への
移動に抵抗を与える平坦な規制面１５ｃ，１５ｃ
とを設け、さらに、前記埋戻し具１５は、前記整
地具１１に対して、整地具による整地作用を受け
て安定静置状態にある泥土に対して埋戻し作用を
行わせることができるように、前後方向に十分な
間隔を隔てて設けてあることを特徴とする湛水圃
場用播種機。 Convex portion 10 for forming a seeding groove a on the ground
The seeding device 7 is running, which is equipped with a soil leveling tool 11 having a soil leveling tool 11 formed on its lower surface, a sowing mechanism A for filling the seeding groove a, and a backfilling tool 15 for filling soil back into the seeding groove a after sowing. In a seeding machine for flooded fields that is connected and supported by a machine body 4, a soil leveling tool 11 having a convex portion 10 for forming the seeding groove and a backfilling tool 15 for backfilling the seeding groove are formed separately. The backfilling tool 15 is provided so as to be able to swing up and down relative to the ground leveling tool 11 and biased toward the ground side. A pair of left and right bulging surfaces 15a, 15a arranged in a V-shape, and flat regulating surfaces 15c, 15c that contact the mud surface and provide resistance to movement of the pair of left and right bulging surfaces 15a, 15a in the sedimentation direction.
Further, the backfilling tool 15 is configured to allow the ground leveling tool 11 to backfill the muddy soil that is in a stable state under the leveling action of the ground leveling tool. , a seeding machine for flooded fields, characterized in that the seeding machine is installed at sufficient intervals in the front-back direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981066840U JPS6314574Y2 (en) | 1981-05-08 | 1981-05-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981066840U JPS6314574Y2 (en) | 1981-05-08 | 1981-05-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57177408U JPS57177408U (en) | 1982-11-10 |
| JPS6314574Y2 true JPS6314574Y2 (en) | 1988-04-23 |
Family
ID=29862863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981066840U Expired JPS6314574Y2 (en) | 1981-05-08 | 1981-05-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6314574Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH063B2 (en) * | 1983-07-29 | 1994-01-05 | 井関農機株式会社 | Surface soil leveling mechanism of powder and grain feeding device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5525482B2 (en) * | 1972-02-24 | 1980-07-07 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS582162Y2 (en) * | 1978-08-07 | 1983-01-14 | ヤンマー農機株式会社 | Submerged direct seeding machine |
-
1981
- 1981-05-08 JP JP1981066840U patent/JPS6314574Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5525482B2 (en) * | 1972-02-24 | 1980-07-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57177408U (en) | 1982-11-10 |
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