JPH052004Y2 - - Google Patents
Info
- Publication number
- JPH052004Y2 JPH052004Y2 JP1985105192U JP10519285U JPH052004Y2 JP H052004 Y2 JPH052004 Y2 JP H052004Y2 JP 1985105192 U JP1985105192 U JP 1985105192U JP 10519285 U JP10519285 U JP 10519285U JP H052004 Y2 JPH052004 Y2 JP H052004Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotary
- soil
- desk
- rotary desk
- tilling
- 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
Links
- 239000002689 soil Substances 0.000 claims description 40
- 230000007246 mechanism Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003971 tillage Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Soil Working Implements (AREA)
Description
【考案の詳細な説明】 <産業上の利用分野> この考案は傾斜地用の揚土装置に関する。[Detailed explanation of the idea] <Industrial application field> This invention relates to a soil lifting device for sloped land.
<従来の技術>
一般に揚土装置の作業部では単なる耕耘だけで
なく耕耘した土を傾斜面の山側に放てきする作用
が求められるが、従来の回転式作業部であるロー
タリーにおいては、例えば特開昭59−213303号公
報に示されるようにロータリー軸のまわりにプロ
ペラ状に耕耘爪を配設したものや、実開昭47−
32920号公報等に示されるように円板状デスクの
まわりに軸心方向の羽根を放射状に取付けた水車
状のロータリー、あるいは揚土装置以外では実公
昭46−15604号公報に示されるように、円板状デ
スクのまわりに先端が接線方向に直立した掘削用
エツジを取付け、エツジの直立した側のデスク面
に排土用の羽根を立設したもの等が知られてい
る。<Prior art> In general, the working part of a soil lifting device is required to not only plow the soil but also to release the tilled soil to the mountain side of a slope. As shown in Japanese Patent Publication No. 59-213303, the tiller claws are arranged around a rotary shaft in the shape of a propeller.
As shown in Publication No. 32920, etc., a water wheel-shaped rotary with blades radially attached in the axial direction around a disc-shaped desk, or other than an earth lifting device, as shown in Publication No. 15604 of 1983, It is known that an excavating edge with its tip standing upright in the tangential direction is attached around a disc-shaped desk, and a blade for discharging soil is erected on the desk surface on the upright side of the edge.
<考案が解決しようとする問題点>
しかし上記従来のロータリーにおいては、最初
のプロペラ状のロータリーでは耕耘土の放てき作
用が不十分であり、第2番目に示した水車状のロ
ータリーでは耕耘抵抗が強すぎて作業性も悪く回
転反力が機体に伝わり危険であるという欠点を有
していた。また第3番目に示した畝作り機用のロ
ータリーは、ロータリー軸を鉛直に近くまたデス
クを水平に近い状態で作動せしめるので畝作り機
用としてはともかく、揚土機用としては耕耘及び
放てき作用が悪く利用できないという問題があ
る。<Problems to be solved by the invention> However, in the conventional rotaries mentioned above, the first propeller-shaped rotary has insufficient action to release tilled soil, and the second waterwheel-shaped rotary has insufficient tilling resistance. It had the disadvantage that the rotational reaction force was too strong, the workability was poor, and the rotational reaction force was transmitted to the fuselage, which was dangerous. In addition, the rotary for the ridge-making machine shown in the third example operates with the rotary axis close to vertical and the desk in a nearly horizontal state, so it is not only suitable for use as a ridge-making machine, but also suitable for use in soil lifting machines for tilling and releasing. The problem is that it does not work well and cannot be used.
<問題点を解決するための手段>
上記問題点を解決するために本考案の装置は、
機体1の後方に支持したロータリー軸17に、ロ
ータリーデスク31を装着し、該ロータリーデス
ク31の外周に複数個の揚土羽根41を着脱自在
に配設した装置において、上記ロータリーデスク
31を軸心に対して回転対称な多角形とし、ロー
タリーデスク31の多角形の頂点を切欠くととも
に該切欠部に外周方向に突出する爪状耕耘部41
bとロータリーデスク31の側面に突出する放て
き部41cとを付設した揚土羽根41を取り付
け、上記ロータリーデスク31の回転時に耕耘部
41bが耕土面に交差して耕耘するとともにロー
タリーデスク31の回転方向に沿つて上向きに揚
土するようにロータリー軸17を機体1の後方に
向けて支持せしめたことを特徴としている。<Means for solving the problems> In order to solve the above problems, the device of the present invention has the following features:
In a device in which a rotary desk 31 is attached to a rotary shaft 17 supported at the rear of the machine body 1, and a plurality of soil lifting blades 41 are detachably arranged around the outer periphery of the rotary disk 31, the rotary disk 31 is set as the axis. The rotary desk 31 has a polygonal shape that is rotationally symmetrical, and the apex of the polygon of the rotary desk 31 is cut out, and a claw-like plowing part 41 protrudes in the outer circumferential direction from the cutout part.
A soil-lifting blade 41 is attached to which a soil-lifting blade 41 has b and a releasing portion 41c that protrudes from the side surface of the rotary desk 31, and when the rotary desk 31 rotates, the tilling portion 41b intersects the tilled soil surface and tills the soil, and the rotary desk 31 rotates. It is characterized in that the rotary shaft 17 is supported toward the rear of the machine body 1 so as to lift soil upward along the direction.
<作用>
本考案の揚土羽根の、耕耘部41bはロータリ
ーデスクが回転することにより、その外周におい
てデスク31の回転方向に沿つて突出しているの
で、極めて少ない抵抗で土中に切込まれて深部ま
で耕耘を行い、耕耘部41bによつて耕耘された
土は直ちに耕耘部41bとデスク面に突出した放
てき部により効率良く傾斜地の山側へ放てきされ
る。<Function> As the rotary disk rotates, the tilling portion 41b of the soil lifting blade of the present invention protrudes along the rotation direction of the disk 31 at its outer periphery, so it is cut into the soil with extremely little resistance. The tillage is carried out to the depths, and the soil tilled by the tilling section 41b is immediately and efficiently thrown to the mountain side of the slope by the tilling section 41b and the releasing section protruding from the desk surface.
<実施例>
図面はいずれも本考案の実施例を示し、第1図
は本考案に係る揚土装置の全体側面図で、図示す
る例では一輪管理機の機体1は後方にハンドル2
を付設し、フレーム3上にエンジン5とトランス
ミツシヨンケース7を搭載し、下部には車輪9が
取付けられ、該車輪9は上記ミツシヨンケース7
の走行出力軸11の回転によりチエン駆動される
構成となつている。13は駆動用チエンを内蔵す
るチエンケースである。<Example> The drawings all show examples of the present invention, and Fig. 1 is an overall side view of the soil lifting device according to the present invention.
An engine 5 and a transmission case 7 are mounted on the frame 3, and wheels 9 are attached to the lower part of the frame 3, and the wheels 9 are attached to the transmission case 7.
The structure is such that the chain is driven by the rotation of the traveling output shaft 11. 13 is a chain case containing a drive chain.
上記ミツシヨンケース7の後方には作業用の出
力軸15が臨出しており、この出力軸15にチエ
ンホイル又はベベルギヤ等を嵌合して、作業部と
接続し、作業部を駆動させる機構である。 A working output shaft 15 protrudes from the rear of the transmission case 7, and a chain wheel, bevel gear, or the like is fitted onto this output shaft 15 to connect it to a working section, and is a mechanism for driving the working section. .
ロータリー軸17はシヤフトケース等の支持部
材19に挿通されて回転自在に軸支され、その上
端は支持部材19内においてベベルギヤを介して
出力軸15に連係されている。ロータリー軸17
の下部突出端には複数枚のロータリーデスク31
で構成されるロータリー33が着脱及び間隔調節
が可能な如く挿入固着されている。各ロータリー
デスク31はその軸心に対して回転対称形状の多
角形をなし、中心にはロータリー軸17を挿入す
るパイプ状のボス35がロータリーデスク31に
対して直交する方向に固着されている。 The rotary shaft 17 is inserted into a support member 19 such as a shaft case and supported so as to be freely rotatable, and its upper end is connected to the output shaft 15 via a bevel gear within the support member 19.
At the lower protruding end of the
The rotary 33 is inserted and fixed so that it can be detached and the interval between them can be adjusted. Each rotary disk 31 has a polygonal shape that is rotationally symmetrical about its axis, and a pipe-shaped boss 35 into which the rotary shaft 17 is inserted is fixed at the center in a direction perpendicular to the rotary disk 31.
上記ボス35とロータリー軸17には、ピン3
7を挿通して両者を着脱自在に固定するための複
数段のピン孔39が穿設され、ロータリーデスク
31の取付け位置及び取付け間隔を調節できる機
構となつている。 The boss 35 and the rotary shaft 17 have a pin 3
A plurality of pin holes 39 are drilled through which the rotary desk 7 is inserted and the two are detachably fixed, and the mounting position and the mounting interval of the rotary desk 31 can be adjusted.
ロータリーデスク31の外周端には各辺毎に交
互に折曲部31aが形成され、該折曲部31aが
ない辺の反折曲部側には揚土羽根41が着脱自在
に取付けられている。該揚土羽根41は、ロータ
リーデスク31の片側の側面と前記折曲部31a
の外側に沿つて嵌合するように重なり合うベース
41aと、該ベース41aの先端から機体1側に
一定の傾斜角度をもつて突出する剣先状の耕耘部
41bと、上記ベース41aの側面においてロー
タリーデスク31の軸心に対して放射状をなし且
つベース41aの側面に直立して突出する放てき
部41cとで一体的に構成されている。また各ロ
ータリーデスク31の揚土羽根41の取付け位置
は各段毎に交互に異なる位相角をもつている。 Bent parts 31a are formed alternately on each side of the outer peripheral edge of the rotary desk 31, and a soil lifting blade 41 is removably attached to the side opposite to the bent part where the bent parts 31a are not present. . The soil lifting blade 41 is connected to one side of the rotary desk 31 and the bent portion 31a.
A base 41a that overlaps so as to fit along the outside of the base 41a, a sword-like plowing part 41b that protrudes from the tip of the base 41a toward the fuselage 1 at a certain angle of inclination, and a rotary desk on the side surface of the base 41a. The base 41a is integrally formed with a projecting portion 41c that is radial with respect to the axis of the base 41a and protrudes upright from the side surface of the base 41a. Further, the mounting positions of the soil lifting blades 41 of each rotary desk 31 have phase angles that are alternately different for each stage.
ロータリーデスク31の折曲部31aはベース
41aを正確且つ安定状態で取付けるためのガイ
ドになるとともに、ロータリーの回転耕耘作業時
に、ベース41aを取付けるボルト43が畑土等
に触れて磨耗しあるいは緩むのを防止する効果が
ある。前記ロータリー33の上部にはロータリー
33を覆うカバー45が設けられ、該カバー45
はロータリー33の後方を覆うように側面形状が
「つ」字形に湾曲し、左右の中心にはカバーフレ
ーム45aが前後方向に設けられ、該カバーフレ
ーム45aは前端においてロータリーシヤフトの
支持部材19のロータリー33にきわめて近接す
る位置に設けた回動支点47において上下回動自
在に軸支されている。 The bent portion 31a of the rotary desk 31 serves as a guide for attaching the base 41a accurately and stably, and also prevents the bolts 43 attaching the base 41a from coming into contact with field soil and becoming worn out or loosening during rotary tillage work. It is effective in preventing A cover 45 covering the rotary 33 is provided on the top of the rotary 33, and the cover 45
The side surface shape is curved in a "T" shape so as to cover the rear of the rotary 33, and a cover frame 45a is provided in the left and right centers in the front and back direction, and the cover frame 45a has a front end that supports the rotary shaft of the rotary shaft support member 19. It is pivotally supported at a rotation fulcrum 47 provided in a position very close to 33 so as to be vertically movable.
またフエンダー45bは、左右方向の縦断面が
中央部を下向きの頂点として谷形に折曲してお
り、カバーフレーム45aから左右に上昇するよ
うに固着され、その折曲した下端が中央において
ロータリー33の軸心上に位置するとともに該フ
エンダー45bの両側端には、該側面の湾曲形状
に沿つた外形をなし、ロータリー33によつて放
てきされる量と飛距離を制御するサイドカバー4
5cが回動角(開閉角)が調節可能な構造でヒン
ジ49等によつて取付けられている。 In addition, the fender 45b has a vertical section in the left and right direction bent in a valley shape with the central part pointing downward, and is fixed so as to rise left and right from the cover frame 45a. Side covers 4 are located on the axis of the fender 45b, and have an outer shape that follows the curved shape of the side surface, and control the amount and distance thrown by the rotary 33 at both ends of the fender 45b.
5c has a structure in which the rotation angle (opening/closing angle) can be adjusted and is attached by a hinge 49 or the like.
さらにカバー45の後端中央には抵抗棒取付部
51を介して抵抗棒53が上下動及び上下位置調
節可能な状態で上下方向に取付けられている。5
1は抵抗棒53の取付高さを調節セツトするセツ
トボルトである。 Furthermore, a resistance rod 53 is attached to the center of the rear end of the cover 45 via a resistance rod attachment portion 51 in a vertically movable and vertically adjustable state. 5
1 is a set bolt for adjusting and setting the mounting height of the resistance rod 53.
抵抗棒53は下端が耕地面に当接して機体進行
時のブレーキ作用、傾斜地で機体が谷側へずり落
ちるのを防止する作用、直進案内作用のほか、耕
深制御等の作用を兼ね備えている。抵抗棒53は
通直な棒体部53aと、その下端において水平方
向に取付られる鍔部53bと、該鍔部53bの下
面において前後方向をなして下向きに突出するガ
イドエツジ53cとからなり、鍔部53bは耕深
制御を、またガイドエツジ53cは直進案内を行
うものである。 The lower end of the resistance rod 53 comes into contact with the plowed ground and has functions such as braking when the machine is moving, preventing the machine from sliding down to the valley side on sloped ground, guiding the machine in a straight line, and controlling the plowing depth. The resistance rod 53 consists of a straight rod portion 53a, a flange portion 53b attached horizontally at its lower end, and a guide edge 53c extending downward in the front-rear direction on the lower surface of the flange portion 53b. Reference numeral 53b is used to control the plowing depth, and guide edge 53c is used to provide straight-line guidance.
カバー45の上部と支持部材19の上部にはブ
ラケツト55a,55bが突設され、該ブラケツ
ト55a,55b間には先端が一方のブラケツト
55bに回転及び上下回動が自在に支持され後方
においては他方のブラケツト55aに回転及び上
下回動が可能な如く螺合して支持されるスクリユ
ー等からなる調節棒55cが設けられている。該
調節棒55cの後端には調節ハンドル55dが設
けられ、該調節ハンドル55dを回転させること
により、カバー41の上下回動調節が行なわれ、
上記機構によりカバー45の上下調節機構55が
構成される。 Brackets 55a and 55b are protruded from the upper part of the cover 45 and the upper part of the support member 19, and between the brackets 55a and 55b, the tip is supported by one bracket 55b so as to be rotatable and vertically movable, and the other one is supported at the rear. An adjustment rod 55c made of a screw or the like is provided on the bracket 55a so that it can rotate and move up and down. An adjustment handle 55d is provided at the rear end of the adjustment rod 55c, and by rotating the adjustment handle 55d, vertical movement of the cover 41 is adjusted.
The above mechanism constitutes a vertical adjustment mechanism 55 for the cover 45.
本実施例における揚土装置は、これを傾斜した
圃場面を横断方向に進行させ、ロータリー33を
左下りの傾斜地では反時計方向に、また右下りの
傾斜地では時計方向に回転させて圃場面を順次耕
耘して行くものである。この際ロータリー33は
先ず上方のロータリーデスク31でその回転軌跡
の深さまで耕耘し、続いて下方のロータリーデス
ク31でその回転軌跡の下端深さまで耕耘する。
各ロータリーデスク31の揚土羽根41を互いに
軸心に対する位相角が異なるように取付けると耕
耘抵抗も分散されスムースに耕耘される。 The soil lifting device in this embodiment moves across the sloping field, and rotates the rotary 33 counterclockwise on a slope going down to the left, and clockwise on a slope going down to the right. It should be cultivated in stages. At this time, the rotary 33 first plows to the depth of its rotation locus with the upper rotary disk 31, and then plows to the lower end depth of its rotation locus with the lower rotary disk 31.
By attaching the soil lifting blades 41 of each rotary desk 31 so that the phase angles with respect to the axis are different from each other, tilling resistance is also dispersed and tilling is carried out smoothly.
ロータリーデスク31に取付けられた揚土羽根
41は耕耘部41bが地面に切り込んで耕耘し、
放てき部41cがその側面でロータリーデスク3
1の回転に従つて耕耘されて土を山側に放てきす
るが、その過程で上向きに跳ね上げられた土はフ
エンダー45b又はサイドカバー45cの内面に
当たつて落下し再度圃場面から揚土羽根41によ
つて山側に放てきされるものである。 The soil lifting blade 41 attached to the rotary desk 31 has a tilling section 41b that cuts into the ground and tills the soil.
The releasing part 41c is attached to the rotary desk 3 on its side.
According to the rotation of 1, the soil is plowed and thrown to the mountain side, but in the process, the soil that is thrown upward hits the inner surface of the fender 45b or side cover 45c and falls, and is removed from the field again by the soil lifting blade. 41, it is thrown to the mountain side.
またこのときカバー45の内部中央がロータリ
ー33の回転軌跡との間をできるだけ狭く保ち且
つフエンダー45bが圃場面の傾斜に沿つて傾斜
しているので、フエンダー45bが山側の地面に
当たることなく、且つ耕耘された土はロータリー
33の軸心上においても最も狭くなつているロー
タリー33とカバー45間の間を通過できず谷側
に落下しない構成となつている。 In addition, at this time, the distance between the inner center of the cover 45 and the rotation locus of the rotary 33 is kept as narrow as possible, and the fender 45b is inclined along the slope of the field, so that the fender 45b does not hit the ground on the mountain side, and it is possible to till the field. The soil is configured so that it cannot pass through the space between the rotary 33 and the cover 45, which is the narrowest space on the axis of the rotary 33, and does not fall to the valley side.
さらにカバー45は上下調節機構55により、
回動支点47を支点として上下回動調節され、カ
バー45とロータリー33との間の隙間を狭少に
且つ略一定に保ちながら耕深が調節される。この
耕深とロータリーデスク31同士の間隔調節は傾
斜地の角度、機体の進行速度、圃場面の土質や硬
さ等の条件に応じて調節される。一方向の耕耘が
終了すると機体1の向きとロータリー33の回転
方向を変え再度同様な作業を繰り返す。 Furthermore, the cover 45 can be adjusted by a vertical adjustment mechanism 55.
The vertical movement is adjusted about the rotation fulcrum 47, and the plowing depth is adjusted while keeping the gap between the cover 45 and the rotary 33 narrow and substantially constant. The plowing depth and the spacing between the rotary desks 31 are adjusted depending on conditions such as the angle of the slope, the speed of movement of the machine, and the quality and hardness of the soil in the field. When plowing in one direction is completed, the direction of the machine body 1 and the rotation direction of the rotary 33 are changed and the same operation is repeated again.
なお、本考案の管理機として一輪管理機を用い
ると、常に車体を鉛直に保ちながら且つ作業者の
手もとに大きな力がかからない最適な状態で耕耘
及び揚土作業ができるという利点がある。 In addition, when a single-wheel management machine is used as the management machine of the present invention, there is an advantage that plowing and soil lifting work can be carried out in an optimal state while always keeping the vehicle body vertical and without applying large force to the operator's hands.
<考案の効果>
以上の如く構成される本考案の装置によれば、
耕耘部はロータリーの回転方向に沿つてロータリ
ーデスク周面に突出しているので上記耕耘部とと
もに非常い少ない抵抗で圃場面の深部まで達して
土を切るようにして耕耘し、放てき部はロータリ
ーの回転方向に直交するようにロータリーデスク
面に突出しているので耕耘部の耕深に応じて効率
良く耕耘土を掻き上げて放てきするという効果が
あり、傾斜地の耕耘作業を円滑にし作業性を向上
させるものである。<Effects of the invention> According to the device of the invention configured as described above,
The tilling section protrudes from the circumference of the rotary desk along the direction of rotation of the rotary, so together with the tilling section, it reaches deep into the field with very little resistance and tills as if cutting the soil. Since it protrudes from the surface of the rotary desk perpendicular to the direction of rotation, it has the effect of efficiently raking and releasing tilled soil according to the tilling depth of the tilling section, making tilling work on sloped land smoother and improving work efficiency. It is something that makes you
図面は本考案の一実施例を示すもので、第1図
A,Bはロータリーデスクと揚土羽根の詳細を示
す平面図と側面図、第2図は揚土装置の全体側面
図、第3図はロータリーとカバーの作用状態を示
す要部背面図である。
31……ロータリーデスク、33……ロータリ
ー、41……揚土羽根、41a……ベース、41
b……耕耘部、41c……放てき部。
The drawings show one embodiment of the present invention. Figures 1A and B are a plan view and side view showing details of the rotary desk and soil lifting blades, Figure 2 is a side view of the entire soil lifting device, and Figure 3 is a side view of the entire soil lifting device. The figure is a rear view of the main parts showing the operating state of the rotary and the cover. 31... Rotary desk, 33... Rotary, 41... Soil lifting blade, 41a... Base, 41
b... Cultivation part, 41c... Release part.
Claims (1)
ロータリーデスク31を装着し、該ロータリーデ
スク31の外周に複数個の揚土羽根41を着脱自
在に配設した装置において、上記ロータリーデス
ク31を軸心に対して回転対称な多角形とし、ロ
ータリーデスク31の多角形の頂点を切欠くとと
もに該切欠部に外周方向に突出する爪状耕耘部4
1bとロータリーデスク31の側面に突出する放
てき部41cとを付設した揚土羽根41を取り付
け、上記ロータリーデスク31の回転時に耕耘部
41bが耕土面に交差して耕耘するとともにロー
タリーデスク31の回転方向に沿つて上向きに揚
土するようにロータリー軸17を機体1の後方に
向けて支持せしめた傾斜地用揚土装置。 On the rotary shaft 17 supported at the rear of the fuselage 1,
In an apparatus in which a rotary desk 31 is mounted and a plurality of soil lifting blades 41 are detachably arranged around the outer periphery of the rotary desk 31, the rotary desk 31 has a polygonal shape that is rotationally symmetrical with respect to the axis, and the rotary desk A claw-like tilling portion 4 is formed by cutting out the apex of the polygon 31 and protruding in the outer circumferential direction from the notch.
1b and a releasing part 41c that protrudes from the side surface of the rotary desk 31. When the rotary desk 31 rotates, the tilling part 41b intersects the tilled soil surface and tills the soil, and at the same time the rotary desk 31 rotates. This soil lifting device for sloped land has a rotary shaft 17 supported toward the rear of the machine body 1 so as to lift soil upward along the direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1985105192U JPH052004Y2 (en) | 1985-07-10 | 1985-07-10 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1985105192U JPH052004Y2 (en) | 1985-07-10 | 1985-07-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6213106U JPS6213106U (en) | 1987-01-27 |
JPH052004Y2 true JPH052004Y2 (en) | 1993-01-19 |
Family
ID=30979388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1985105192U Expired - Lifetime JPH052004Y2 (en) | 1985-07-10 | 1985-07-10 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH052004Y2 (en) |
-
1985
- 1985-07-10 JP JP1985105192U patent/JPH052004Y2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS6213106U (en) | 1987-01-27 |
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