JPH0142963Y2 - - Google Patents
Info
- Publication number
- JPH0142963Y2 JPH0142963Y2 JP14174583U JP14174583U JPH0142963Y2 JP H0142963 Y2 JPH0142963 Y2 JP H0142963Y2 JP 14174583 U JP14174583 U JP 14174583U JP 14174583 U JP14174583 U JP 14174583U JP H0142963 Y2 JPH0142963 Y2 JP H0142963Y2
- Authority
- JP
- Japan
- Prior art keywords
- claw
- tilling
- shaft
- tilling claw
- claws
- 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
- 210000000078 claw Anatomy 0.000 claims description 114
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000003466 welding Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000003971 tillage Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Soil Working Implements (AREA)
Description
【考案の詳細な説明】
(イ) 産業上の利用分野
本考案は耕耘機やトラクターに装着するロータ
リー耕耘装置の耕耘爪装置に関するものである。[Detailed description of the invention] (a) Industrial application field The present invention relates to a tiller claw device of a rotary tiller installed on a tiller or a tractor.
(ロ) 従来技術
従来の耕耘爪装置は第２図に示す如く、両端に
固定用のフランジを設けた筒体の耕耘爪軸の外周
に、爪座を溶接固定し、この爪座に耕耘爪を挿入
しボルトにて耕耘爪と爪座を固定していたのであ
る。(B) Prior art As shown in Fig. 2, the conventional tilling claw device has a claw seat fixed by welding to the outer periphery of a cylindrical tilling claw shaft with fixing flanges at both ends, and the tilling claw is attached to this claw seat. was inserted and the tiller claw and claw seat were fixed with bolts.
又は実公昭31−12408号公報に示される如く、
単位長の耕耘爪軸に耕耘爪を固着し、これをボル
トにて連設し、一本の耕耘爪軸としていたのであ
る。 Or as shown in Utility Model Publication No. 31-12408,
The tilling claws were fixed to a unit-length tilling claw shaft, and these were connected with bolts to form a single tilling claw shaft.
(ハ) 考案が解決しようとする問題点
しかし、これらの従来の耕耘爪装置は、爪をと
りつける爪座やホルダーの耕耘爪軸への溶接が必
要であり、溶接時に溶接歪が発生していたのであ
る。(c) Problems that the invention aims to solve However, these conventional tilling claw devices require welding of the claw seats and holders to the tilling claw shaft, which causes welding distortion during welding. It is.
又、それぞれの耕耘爪毎に爪座へボルトにて固
定する為に締付け工数が増えて、面倒だつたので
ある。その他に作業時に振動により徐々にボルト
が弛んでしまうので増し締めが必要であつたり、
爪の配列の組合わせを種々に変えることができな
い等の不具合いもあつたのである。 In addition, since each tilling claw was fixed to the claw seat with a bolt, the number of tightening steps increased, which was troublesome. In addition, bolts may gradually loosen due to vibration during work, so retightening may be necessary.
There were also problems such as the inability to change the combination of the arrangement of the claws in various ways.
本考案はこれらの不具合いを解消することを目
的としたものである。 The present invention aims to solve these problems.
(ニ) 問題が解決するための手段
本考案の目的は以上の如くであり、次に該目的
を達成する為の構成を説明すると。(d) Means for solving the problem The purpose of the present invention is as described above. Next, the configuration for achieving the purpose will be explained.
多角形の耕耘爪軸に同じく多角形の穴を設けた
板爪と、多角形又は円形のパイプを交互に差込
み、耕耘爪軸の入力側ネジ部と、耕耘動力伝動ケ
ースのフアイナルシヤフトのネジ部を耕耘爪軸の
作業時回転方向で締まる方向のネジに構成し、爪
軸の入力側ネジ部と、フアイナルシヤフトのネジ
部を螺装することにより耕耘爪軸を構成したもの
である。 Insert plate claws with similarly polygonal holes into the polygonal tilling claw shaft and polygonal or circular pipes alternately, and connect the threaded part on the input side of the tilling claw shaft and the threaded part of the final shaft of the tilling power transmission case. The tilling claw shaft is configured by screwing in the direction of tightening in the direction of rotation of the tilling claw shaft during operation, and the input side threaded portion of the claw shaft and the threaded portion of the final shaft are screwed together.
また、板爪を側面視巴形とし、巴形の両先端を
耕耘爪軸に沿つて左右逆方向折曲げ構造としたも
のである。 Further, the plate claws have a tomoe shape when viewed from the side, and both ends of the tomoe shape are bent in left and right opposite directions along the tilling claw axis.
また、板爪の中央に開口する多角形の穴の向き
を変えて開口したものである。 In addition, the polygonal hole that opens in the center of the plate claw is opened in a different direction.
(ホ) 実施例
本考案の目的は以上の如くであり、添付の図面
に示した実施例の構成に基づいて、本考案の構成
を説明すると。(e) Embodiment The purpose of the present invention is as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.
第１図は２軸形ロータリー耕耘装置の側面図、
第２図は従来の耕耘爪装置の斜視図、第３図は本
考案の耕耘爪装置の後面断面図、第４図は同じく
耕耘爪軸１部のみの後面断面図、第５図・第６
図・第７図は耕耘爪軸が四角形、変形四角形、六
角形の場合の断面図、第８図は耕耘爪装置の組立
て時の後面図、第９図は爪の配置の関係を示す図
面、第１０図・第１１図は板爪の多角形の穴の配
置を変更した板爪の側面図、第１２図はパイプの
断面図、第１３図は板爪の素材カツト時の材料取
りを示す図面である。 Figure 1 is a side view of a two-shaft rotary tiller;
FIG. 2 is a perspective view of a conventional tilling claw device, FIG. 3 is a rear sectional view of the tilling claw device of the present invention, FIG. 4 is a rear sectional view of only one part of the tilling claw shaft, and FIGS. 5 and 6
Figure 7 is a cross-sectional view when the tilling claw shaft is square, modified square, or hexagonal, Figure 8 is a rear view when the tilling claw device is assembled, and Figure 9 is a drawing showing the relationship between the arrangement of the claws. Figures 10 and 11 are side views of the plate claw with the arrangement of the polygonal holes of the plate claw changed, Figure 12 is a cross-sectional view of the pipe, and Figure 13 shows the material removal when cutting the material for the plate claw. It is a drawing.
第１図において、２軸形ロータリー耕耘装置は
主耕耘伝動チエーンケース２２とサイドカバーに
て主耕耘爪装置Ｃを軸支駆動し、副耕耘伝動チエ
ーンケース２３にて、副耕耘爪装置Ｄを軸支駆動
している。 In FIG. 1, the two-shaft rotary tiller drives the main tilling claw device C with a main tilling transmission chain case 22 and a side cover, and the auxiliary tilling claw device D with an auxiliary tilling transmission chain case 23. Support drive.
２５は主耕耘カバーであり、２４は副耕耘カバ
ーである。副耕耘爪装置は主耕耘爪装置に対して
逆転回転しており、デプスフレーム２８の上下動
につれて吊設杆２６を介して上下動可能とされて
いる。２７はハンガーロツドでありリアカバーを
吊設している。 25 is a main tilling cover, and 24 is an auxiliary tilling cover. The auxiliary tilling claw device rotates in the opposite direction to the main tilling claw device, and can be moved up and down via the hanging rod 26 as the depth frame 28 moves up and down. 27 is a hanger rod from which the rear cover is hung.
これらのロータリー耕耘装置に用いる耕耘爪装
置は従来第２図の如く構成されていたのである。 The tiller claw device used in these rotary tillers has conventionally been constructed as shown in FIG.
即ち、左右に取付フランジ１９，２０を溶接固
定した筒形の耕耘爪軸１８に爪座２１，２１…を
溶接固定し、この爪座に耕耘爪１７，１７…を挿
入し、ボルト締めしていたのである。 That is, the claw seats 21, 21... are welded and fixed to the cylindrical tilling claw shaft 18 to which mounting flanges 19, 20 are welded on the left and right sides, and the tilling claws 17, 17... are inserted into the claw seats and tightened with bolts. It was.
このような従来タイプの耕耘爪装置であると、
溶接時の歪や溶接工程の複雑さ、一本ごとのボル
ト締めの繁雑さ等の不具合いがあつた。 With this type of conventional tilling claw device,
There were problems such as distortion during welding, the complexity of the welding process, and the complexity of tightening each bolt.
本考案はこの点を改良し、第３図以下の如く構
成したものである。 The present invention improves this point and is constructed as shown in FIG. 3 and below.
まず本考案の耕耘爪である板爪５の製造工程か
ら説明すると。 First, the manufacturing process of the plate claw 5, which is the tiller claw of the present invention, will be explained.
第１３図の材料取りの展開図に示す如く、板爪
５の形状を巴形の形状とし、２枚・３枚と横に並
べてゆくと、第１３図の如く無駄な隙間の無いよ
うな形になるのである。 As shown in the development view of material removal in Fig. 13, the shape of the plate claws 5 is made into a tomoe shape, and when two and three pieces are arranged side by side, a shape with no unnecessary gaps is created as shown in Fig. 13. It becomes.
このような構成とすることにより、鉄板から板
取りする場合に無駄な切屑が発生しないのであ
る。 With such a configuration, no wasteful chips are generated when cutting an iron plate.
このような板取り構成をプレスにて切断して素
材取りした後に第１０図・第１１図の如く中央の
多角形の構成爪軸１に合致する穴５ｂを開けるの
であるが板爪の取りつけ方にバラエテイーを持た
せるように、第１０図のＢの如く穴５ｂを開けた
り、第１１図のＡの如く穴５ｂを開けたりして、
何種類かを作るのである。 After cutting such a board structure with a press and removing the material, a hole 5b that matches the center polygonal structure claw shaft 1 is drilled as shown in Figs. 10 and 11. How to attach the board claws In order to have variety, holes 5b are made as shown in B in Fig. 10, and holes 5b are made as shown in A in Fig. 11.
Make several types.
本実施例ではＡタイプとＢタイプの２種類を構
成している。 In this embodiment, there are two types, A type and B type.
又、巴形の爪の外縁を補強と土の跳ね上げ効果
を持たせる為にプレスにて、耕耘爪軸にそつて左
右に逆方向へ曲げている。 In addition, the outer edges of the tomoe-shaped claws are bent in opposite directions left and right along the axis of the tilling claws using a press in order to provide reinforcement and the effect of throwing up soil.
そして、プレス加工、穴加工の終つたものを焼
き入れして、硬度を持たせているのである。 After pressing and drilling, the material is quenched to give it hardness.
第１２図は、板爪５と板爪５の間に嵌入するス
ペーサーの役目のパイプである。 FIG. 12 shows a pipe that serves as a spacer that fits between the plate claws 5.
パイプ２の大部分は円形のパイプでよいが、耕
耘爪軸１の雌ネジ部８ａと、フアイナルシヤフト
７の雄ネジ部７ａとの螺合を解く場合にスパナを
かけられるようにネジ部の近辺には外形が耕耘爪
軸１の多角形と同じ形状の多角形パイプ３，４を
介装している。 Most of the pipe 2 may be a circular pipe, but the area near the threaded part is so that a wrench can be applied when unscrewing the female threaded part 8a of the tilling claw shaft 1 and the male threaded part 7a of the final shaft 7. Polygonal pipes 3 and 4 having the same outer shape as the polygon of the tilling claw shaft 1 are interposed between the two.
そして爪の配列は万遍なく、耕耘が行われるよ
うに第８図・第９図の如く構成されている。実施
例で19本の爪が角度30゜毎に配列されており、そ
れぞれの位置でＡタイプ又はＢタイプの板爪が挿
入されている。第９図の配置図は一例であり、他
の配列も考えられているのである。 The claws are arranged evenly and are configured as shown in Figures 8 and 9 so that tillage can be carried out. In the embodiment, 19 claws are arranged at an angle of 30°, and an A type or B type plate claw is inserted at each position. The arrangement diagram in FIG. 9 is an example, and other arrangements are also possible.
耕耘爪軸の形状が六角形であれば板爪５の穴が
１タイプであると、爪は60゜毎に配列されること
になるが穴５ｂの位置をずらして２タイプにする
と12通りの配置が可能になるのである。又、３通
り、４通りと増やすこともでき多種の組み合わせ
が可能となるのである。 If the shape of the tilling claw shaft is hexagonal, if the holes in the plate claws 5 are of one type, the claws will be arranged every 60 degrees, but if the positions of the holes 5b are shifted to create two types, there will be 12 different types. This allows for placement. In addition, the number of combinations can be increased to three or four, allowing for a wide variety of combinations.
第３図・第４図に耕耘爪軸１とネジ部の形状が
示されている。多角形の筒より構成される耕耘爪
軸１はサイドプレート３０側の端軸６に溶接固定
され、該溶接固定部の外周にストツパー９が固設
されている。１３はサイドプレート側の軸受ケー
スである。 The shapes of the tilling claw shaft 1 and the threaded portion are shown in FIGS. 3 and 4. A tilling claw shaft 1 constituted by a polygonal cylinder is welded and fixed to an end shaft 6 on the side plate 30 side, and a stopper 9 is fixed to the outer periphery of the welded portion. 13 is a bearing case on the side plate side.
耕耘爪軸１は四角形でも五角形でもよく、第５
図・第６図の如く変形でもよいものである。実施
例においては、第７図の六角形の耕耘爪軸１を用
いている。 The tilling claw shaft 1 may be square or pentagonal, and the fifth
It may be modified as shown in Fig. 6. In the embodiment, a hexagonal tilling claw shaft 1 shown in FIG. 7 is used.
そして、耕耘爪軸１の耕耘伝動チエーンケース
側端にネジ体８を溶接固定し、このネジ体８の内
周に雌ネジ部８ａを刻設している。 A threaded body 8 is welded and fixed to the end of the tilling claw shaft 1 on the side of the tilling transmission chain case, and a female threaded portion 8a is carved on the inner periphery of the threaded body 8.
そしてこの雌ネジ部８ａと螺合する雄ネジ部７
ａを耕耘伝動チエーンケースのフアイナルシヤフ
ト７に設けている。１８は耕耘伝動チエーンケー
ス内のスプロケツトである。１１は軸受ケースで
ある。そして、耕耘爪軸１側の雌ネジ部８ａ、フ
アイナルシヤフト７側の雄ネジ部７ａを作業時の
耕耘爪軸１の回転方向で締まる方向に構成してい
るので、作業をすればするほど板爪は締め付けら
れる方向となり、ガタや弛みの発生がなくなつた
のである。 A male threaded portion 7 screws into this female threaded portion 8a.
A is provided on the final shaft 7 of the tillage transmission chain case. 18 is a sprocket in the tillage transmission chain case. 11 is a bearing case. The female threaded part 8a on the tilling claw shaft 1 side and the male threaded part 7a on the final shaft 7 side are configured to tighten in the direction of rotation of the tilling claw shaft 1 during work, so the more the work is done, the more the plate tightens. The claws are now in the tightened direction, eliminating looseness and looseness.
又、第３図・第８図に示すようにネジ体８と、
左端のパイプ３，４は耕耘爪軸１の多角形の形状
に合致する多角形とし、大形のスパナが嵌入可能
として補修分解を容易にしている。 Moreover, as shown in FIGS. 3 and 8, a screw body 8,
The left end pipes 3 and 4 have a polygonal shape that matches the polygonal shape of the tiller claw shaft 1, and a large spanner can be inserted thereinto to facilitate repair and disassembly.
(ヘ) 考案の効果
本考案は以上の如く構成したので、次のような
効果を奏するものである。(f) Effects of the invention Since the invention is constructed as described above, it has the following effects.
第１に、多角形の耕耘爪軸に同じく多角形の穴
を設けた板爪と多角形又は円形のパイプを交互に
差込み、耕耘爪軸の入力側ネジ部と耕耘ケースの
フアイナルシヤフトのネジ部を、耕耘爪軸の作業
時回転方向で締める方向のネジに構成して、爪軸
の入力側ネジ部とフアイナルシヤフトのネジ部を
螺装させたので、耕耘爪軸の従来の如く、爪座や
取付けフランジを溶接する手間が省け、耕耘爪軸
における溶接歪みが生じないのである。 First, alternately insert plate claws with polygonal holes and polygonal or circular pipes into the polygonal tilling claw shaft, and connect the threaded part of the input side of the tilling claw shaft to the threaded part of the final shaft of the tillage case. The screw is configured to tighten in the direction of rotation of the tilling claw shaft during work, and the input side threaded part of the claw shaft and the threaded part of the final shaft are screwed together, so that the claw seat can be tightened in the direction of rotation of the tilling claw shaft. This eliminates the need for welding the screws and mounting flanges, and eliminates welding distortion on the tiller claw shaft.
又、爪を従来の如く一本一本締めつける手間が
省けるので組付け容易、ボルトナツト不要、工具
不要等の効果が奏せられるのである。 In addition, since it is not necessary to tighten the claws one by one as in the conventional method, assembly is easy, and there are advantages such as no need for bolts/nuts or tools.
又、板爪の嵌合用の穴の位置をずらすことによ
り、爪の組合わせをいろいろと作れるのである。
又、爪間隔や爪の向き、回転方向の爪の配置、爪
の本数等もいろいろにかえられるのである。 Furthermore, by shifting the positions of the holes for fitting the plate claws, various combinations of the claws can be created.
Furthermore, the spacing between the claws, the direction of the claws, the arrangement of the claws in the direction of rotation, the number of claws, etc. can be changed in various ways.
第２に、板爪を側面視巴形とし、巴形の両先端
を耕耘爪軸に沿つて左右逆方向折曲げ構造とした
のでまず巴形により、鉄板からの板取りにおいて
無駄が少なくなり、先端を耕耘爪軸にそつて左右
逆方向に折曲げることにより、板爪の強度の向上
を図り、更に耕土の跳ね上げが期待できるのであ
る。 Second, the plate claws are shaped like a tomoe when viewed from the side, and both tips of the tomoe shape are bent in opposite directions from left to right along the axis of the tilling claws.First of all, the tomoe shape reduces waste when cutting plates from iron plates. By bending the tips in opposite directions from left to right along the axis of the tilling claws, the strength of the plate claws can be improved and moreover, it is expected that the tilled soil will be thrown up.
第３に、板爪の中央の開口を向きを変えたこと
により、前述の如く爪の回転方向の配列に多様性
を持たせることができたのである。 Thirdly, by changing the orientation of the central opening of the plate claw, it is possible to provide diversity in the arrangement of the claws in the rotational direction, as described above.
第１図は２軸形ロータリー耕耘装置の側面図、
第２図は従来の耕耘爪装置の斜視図、第３図は本
考案の耕耘爪装置の後面断面図、第４図は同じく
耕耘爪軸１部のみの後面断面図、第５図・第６
図・第７図は耕耘爪軸が四角形・変形四角形・六
角形の場合の断面図、第８図は耕耘爪装置の組立
て時の後面図、第９図は爪の配置の関係を示す図
面、第１０図・第１１図は板爪の多角形の穴の配
置を変更した板爪の側面図、第１２図はパイプの
断面図、第１３図は板爪の素材カツト時の材料取
りを示す図面である。
１……耕耘爪軸、２……円形パイプ、３，４…
…多角形パイプ、５……板爪、５ｂ……穴、７…
…フアイナルシヤフト、８……ネジ体、７ａ……
雄ネジ部、８ａ……雌ネジ部。
Figure 1 is a side view of a two-shaft rotary tiller;
FIG. 2 is a perspective view of a conventional tilling claw device, FIG. 3 is a rear sectional view of the tilling claw device of the present invention, FIG. 4 is a rear sectional view of only one part of the tilling claw shaft, and FIGS. 5 and 6
Figure 7 is a sectional view when the tilling claw shaft is square, modified square, or hexagonal, Figure 8 is a rear view when the tilling claw device is assembled, and Figure 9 is a diagram showing the relationship between the arrangement of the claws. Figures 10 and 11 are side views of the plate claw with the arrangement of the polygonal holes of the plate claw changed, Figure 12 is a cross-sectional view of the pipe, and Figure 13 shows the material removal when cutting the material for the plate claw. It is a drawing. 1... Cultivating claw shaft, 2... Circular pipe, 3, 4...
...Polygonal pipe, 5...Plate claw, 5b...Hole, 7...
...Final shaft, 8...Screw body, 7a...
Male thread part, 8a...Female thread part.
Claims (1)
た板爪と、多角形又は円形のパイプを交互に差
込み、耕耘爪軸の入力側ネジ部と、耕耘動力伝
動ケースのフアイナルシヤフトのネジ部を耕耘
爪軸の作業時回転方向で締まる方向のネジに構
成し、爪軸の入力側ネジ部と、フアイナルシヤ
フトのネジ部を螺装することにより耕耘爪軸を
構成したことを特徴とする耕耘爪装置。 (2) 板爪を側面視巴形とし、巴形の両先端を耕耘
爪軸に沿つて左右逆方向折曲げ構造としたこと
を特徴とする実用新案登録請求の範囲第１項記
載の耕耘爪装置。 (3) 板爪の中央に開口する多角形の穴の向きを変
えて開口したことを特徴とする実用新案登録請
求の範囲第１項記載の耕耘爪装置。[Claims for Utility Model Registration] (1) Plate claws with similarly polygonal holes are inserted into a polygonal tilling claw shaft, and polygonal or circular pipes are inserted alternately into the threaded part on the input side of the tilling claw shaft. By configuring the threaded part of the final shaft of the tilling power transmission case to be a screw that tightens in the direction of rotation of the tilling claw shaft during operation, and by threading the input side threaded part of the claw shaft and the threaded part of the final shaft, the tilling can be carried out. A tilling claw device characterized by comprising a claw shaft. (2) The tilling claw according to claim 1 of the utility model registration claim, characterized in that the plate claw has a tomoe shape when viewed from the side, and both ends of the tomoe shape are bent in left and right opposite directions along the tilling claw axis. Device. (3) The tilling claw device according to claim 1, which is a registered utility model, characterized in that the polygonal hole opened in the center of the plate claw is opened in a different direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14174583U JPS6049702U (en) | 1983-09-12 | 1983-09-12 | tilling claw device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14174583U JPS6049702U (en) | 1983-09-12 | 1983-09-12 | tilling claw device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6049702U JPS6049702U (en) | 1985-04-08 |
| JPH0142963Y2 true JPH0142963Y2 (en) | 1989-12-14 |
Family
ID=30316934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14174583U Granted JPS6049702U (en) | 1983-09-12 | 1983-09-12 | tilling claw device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6049702U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0829001B2 (en) * | 1987-06-26 | 1996-03-27 | 小橋工業株式会社 | Scratch / crushed nail |
| JP3735322B2 (en) * | 2002-07-16 | 2006-01-18 | 来田農産株式会社 | Tillage claw attachment device and forward / reverse rotary tillage device |
-
1983
- 1983-09-12 JP JP14174583U patent/JPS6049702U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6049702U (en) | 1985-04-08 |
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