JPS6324777B2 - - Google Patents

Info

Publication number
JPS6324777B2
JPS6324777B2 JP54096372A JP9637279A JPS6324777B2 JP S6324777 B2 JPS6324777 B2 JP S6324777B2 JP 54096372 A JP54096372 A JP 54096372A JP 9637279 A JP9637279 A JP 9637279A JP S6324777 B2 JPS6324777 B2 JP S6324777B2
Authority
JP
Japan
Prior art keywords
punched steel
laminate
holding device
stacked
positioning
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
Application number
JP54096372A
Other languages
Japanese (ja)
Other versions
JPS5619941A (en
Inventor
Kazuyasu Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP9637279A priority Critical patent/JPS5619941A/en
Publication of JPS5619941A publication Critical patent/JPS5619941A/en
Publication of JPS6324777B2 publication Critical patent/JPS6324777B2/ja
Granted legal-status Critical Current

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Description

【発明の詳細な説明】 本発明は例えばステータコア等を構成する打抜
き鋼板を所定の積層厚さずつ積取る積層板の定寸
積取り装置に関するもので、その目的は、定位置
で保持動作を行う保持装置によつて積上げられた
積層板を保持し、その保持を解くことにより、積
層板を所定量下降させた後、保持装置を再び保持
動作させて、その保持から残された下方の積層板
を一単位の積層品素材として取出すことができ、
その際、保持装置の保持解除による積層板の下降
時にこれを受け部材によつて支持しながら下降さ
せるようにしてガイド等を設けなくとも取出すべ
き積層板が崩れたりすることを防止できる等の効
果を奏する積層板の定寸積取り装置を提供するに
ある。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laminate stacking device for stacking punched steel plates constituting, for example, a stator core, etc. to a predetermined stacking thickness, and its purpose is to perform a holding operation in a fixed position. The stacked laminates are held by the holding device, and the laminates are lowered by a predetermined amount by releasing the hold, and then the holding device is held again, and the lower laminates remaining from the holding are removed. can be extracted as a unit of laminate material,
At this time, when the laminate is lowered by releasing the holding device, the laminate to be taken out can be prevented from collapsing without having to provide a guide or the like by lowering the laminate while being supported by the receiving member. An object of the present invention is to provide a sizing device for laminates that performs the following functions.

以下本発明の一実施例をステータコア用の打抜
き鋼板の定寸積取り装置に適用して図面に基づき
説明する。まず第1図及び第2図において、1は
ベツドで、その一端部寄りの部位には上下に開放
する矩形状の開口部2が形成されており、該開口
部2の真上に積層板たる打抜き鋼板3を収納する
ためのマガジン4をベツド1から所定高さ離して
縦形に固定配置している。5はマガジン4に収納
された打抜き鋼板層Aを例えばクランプ方式によ
つて保持する保持装置で、この保持装置5におい
て、6及び7は前記開口部2の両側に位置するよ
うにしてベツド1上に立設した一対の支枠で、一
方の支枠6の上部にはスライド可能な押圧側のブ
ロツク8,9を上下二段に配置し、両ブロツク
8,9を連結枠10を介してクランプ用エアシリ
ンダ11のロツド11aに連結しており、また他
方の支枠7には受け側のブロツク12,13を上
下二段に配置してこれらを調節用ボルト14,1
5によつて固定している。両支枠6,7のブロツ
ク8,9,12,13はマガジン4の下方近傍に
位置し、下段のブロツク9,13の先端部には略
楔状の爪片9a,13aを固着している。このよ
うに構成した保持装置5は、常に押圧側のブロツ
ク8,9がクランプ用エアシリンダ11により矢
印B方向に押圧されていることによつて、押圧側
のブロツク8,9と受け側のブロツク12,13
との間にマガジン4内に収納された打抜き鋼板層
Aをその下端部分において挾持しており、特に下
段のブロツク9,13は爪部9a,13aを最下
段の打抜き鋼板3に食い込ませるようにしてこれ
を挾持している(第3図参照)。16及び17は
前記ベツド1の開口部2の真下に位置するように
上下二段に固定配置した受け用エアシリンダ及び
位置決め用エアシリンダで、下段の位置決め用エ
アシリンダ17のロツド17aには支柱18を立
設した連結板19を固着すると共に支柱18の上
端に位置決め用部材たる位置決め台20を取着し
ている。また上段の受け用エアシリンダ16のロ
ツド16aは位置決め台20の中央を挿通してそ
の上方に突出しており、該ロツド16aには位置
決め台20の上方に位置する受け部材たる受け台
21を取着している。前記位置決め用エアシリン
ダ17のロツド17aはシリンダ本体17bから
下方にも突出しており、その下端にはゲージ受け
22を取着し、該ゲージ受け22に略U字状の厚
さゲージ23を着脱可能に装備している。そし
て、このゲージ23を厚さ寸法の異なるものと交
換することにより、後述の如く位置決め用エアシ
リンダ17のロツド17aが上昇したときに、位
置決め台20のセツト高さ位置を変えることがで
きるようにしている。24は所定の積層厚さに積
取られた打抜き鋼板3を取出すべくベツド1上面
を案内面として次工程に送出す移送装置で、これ
は移送用エアシリンダ25のロツド25aにベツ
ド1上をスライドする押し板26を取着して成
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings as applied to a sizing device for punched steel plates for stator cores. First, in FIGS. 1 and 2, 1 is a bed, and a rectangular opening 2 that opens vertically is formed near one end of the bed, and a laminated plate is placed directly above the opening 2. A magazine 4 for storing punched steel plates 3 is fixedly arranged vertically at a predetermined height away from the bed 1. Reference numeral 5 denotes a holding device for holding the punched steel sheet layer A stored in the magazine 4, for example, by a clamping method. A pair of supporting frames are installed upright, and on the upper part of one supporting frame 6, sliding blocks 8 and 9 on the pressing side are arranged in two stages, upper and lower, and both blocks 8 and 9 are clamped via a connecting frame 10. It is connected to the rod 11a of the air cylinder 11, and the receiving blocks 12, 13 are arranged in two stages, upper and lower, on the other support frame 7, and these are connected to the adjusting bolts 14, 1.
It is fixed by 5. Blocks 8, 9, 12, 13 of both support frames 6, 7 are located near the bottom of the magazine 4, and substantially wedge-shaped claw pieces 9a, 13a are fixed to the tips of the lower blocks 9, 13. The holding device 5 configured in this manner has the blocks 8, 9 on the pushing side always pressed in the direction of arrow B by the clamping air cylinder 11, so that the blocks 8, 9 on the pushing side and the block on the receiving side are held together. 12,13
The punched steel plate layer A stored in the magazine 4 is held between the magazine 4 at its lower end, and in particular, the lower blocks 9 and 13 are designed so that their claws 9a and 13a bite into the lowermost punched steel plate 3. This is held in place (see Figure 3). Reference numerals 16 and 17 denote receiving air cylinders and positioning air cylinders fixedly arranged in two stages, upper and lower, so as to be located directly below the opening 2 of the bed 1, and a support 18 is attached to the rod 17a of the lower positioning air cylinder 17. A connecting plate 19 having an upright structure is fixed thereto, and a positioning stand 20 serving as a positioning member is attached to the upper end of the support column 18. Further, the rod 16a of the upper receiving air cylinder 16 is inserted through the center of the positioning table 20 and protrudes above it, and a receiving table 21, which is a receiving member located above the positioning table 20, is attached to the rod 16a. are doing. The rod 17a of the positioning air cylinder 17 also protrudes downward from the cylinder body 17b, and a gauge receiver 22 is attached to the lower end of the rod 17a, and a substantially U-shaped thickness gauge 23 can be attached to and detached from the gauge receiver 22. is equipped with. By replacing this gauge 23 with one having a different thickness, it is possible to change the set height position of the positioning table 20 when the rod 17a of the positioning air cylinder 17 rises as described later. ing. Reference numeral 24 denotes a transfer device that sends the punched steel plates 3 stacked to a predetermined stacked thickness to the next process using the upper surface of the bed 1 as a guide surface. A push plate 26 is attached thereto.

上記構成においてマガジン4内に積上げられた
打抜き鋼板層Aから所定の積層厚さの打抜き鋼板
を積取るには、まず第1図及び第2図に示す状態
から、受け用エアシリンダ16により受け台21
を打抜き鋼板層Aに当接するまで上昇させ(第4
図a参照)、該受け台21が打抜き鋼板層Aに当
接したところで、クランプ用エアシリンダ11の
ロツド11aを後退させて保持装置5による打抜
き鋼板層Aの保持を解き、該打抜き鋼板層Aをそ
のまま受け台21に支持せしめる。次に位置決め
用エアシリンダ17のロツド17aを厚さゲージ
23がシリンダ本体17bに当接するまで上昇さ
せて、位置決め台20をベツド1より上方の所定
高さ位置にセツトし(第4図b参照)、この後、
受け用エアシリンダ16により受け台21を下降
させる。すると、打抜き鋼板層Aは受け台21上
に支持されたままの状態で該受け台21と共に下
降し、受け台21は、位置決め用エアシリンダ1
7の上昇付勢力の方が受け用エアシリンダ16の
下降付勢力よりも大きく設定されていることによ
り、位置決め台20に当接したところでその下降
移動を停止する。このようにして受け台21の下
降移動が停止されたところで、クランプ用エアシ
リンダ11のロツド11aを進出させて押え側の
ブロツク8,9を矢印B方向にスライドせしめ、
以て打抜き鋼板層Aを保持装置5により再保持す
る(第4図c参照)。この保持装置5の再保持動
作により、その爪片9a,13aは受け台21上
に支持された状態にある打抜き鋼板層Aのうち該
爪片9a,13aと同一レベルにある打抜き鋼板
3を挾持し、従つて爪片9a,13aにより挾持
された打抜き鋼板3より下方のものは、保持装置
5の再保持から外れた状態となる。斯る保持装置
5の再保持動作後、位置決め用エアシリンダ17
により位置決め台20を下降させると、それまで
下降を止められていた受け台21は位置決め台2
0と共に下降し(或いは位置決め台20より少し
遅れて受け台21単独下降でもよい)、ベツド1
上面より下方の元位置に復帰する。而して、前述
のようにして保持装置5による保持から外された
所定枚数の打抜き鋼板3は上記受け台21の下降
に伴つて下降し、ベツト1上面に載置される(第
1図及び第2図二点鎖線参照)。然る後、移送用
エアシリンダ25のロツド25aを進出させて、
ベツド1上に載置された打抜き鋼板3を所望の位
置に取出すべく即ち押し板26によつて次工程に
送出すものである。以上のような一積取りサイク
ルを順次繰返えして、所定の積層厚さの打抜き鋼
板を連続的に積取るものであり、その積取られた
打抜き鋼板(ステータコア素材)は次に検査工程
に送られて厚さ等を検査され、更に良品のみが溶
接工程に送られる。この溶接工程においては、ス
テータコア素材Cは第5図に示すように治具27
に分離用鋼板28を相互間に介在させるようにし
て多段に積重ねられ、この状態で溶接機により各
ステータコア素材Cの打抜き鋼板相互の接合が行
われ、第6図に示すようなステータコアDが形成
される。
In the above configuration, in order to stack a predetermined stacked thickness of punched steel plates from the punched steel plate layer A stacked in the magazine 4, first, from the state shown in FIGS. 1 and 2, the receiving air cylinder 16 21
is raised until it contacts the punched steel plate layer A (fourth
When the pedestal 21 comes into contact with the punched steel sheet layer A, the rod 11a of the clamping air cylinder 11 is moved back to release the holding device 5 from holding the punched steel sheet layer A. is supported as it is on the pedestal 21. Next, the rod 17a of the positioning air cylinder 17 is raised until the thickness gauge 23 comes into contact with the cylinder body 17b, and the positioning table 20 is set at a predetermined height position above the bed 1 (see Fig. 4b). ,After this,
The receiving stand 21 is lowered by the receiving air cylinder 16. Then, the punched steel plate layer A descends together with the pedestal 21 while being supported on the pedestal 21, and the pedestal 21 is moved down by the positioning air cylinder 1.
Since the upward biasing force of the receiving air cylinder 7 is set larger than the downward biasing force of the receiving air cylinder 16, the downward movement of the receiving air cylinder 16 is stopped when it comes into contact with the positioning table 20. When the downward movement of the pedestal 21 is stopped in this way, the rod 11a of the clamping air cylinder 11 is advanced to slide the blocks 8 and 9 on the presser side in the direction of arrow B.
The punched steel sheet layer A is then held again by the holding device 5 (see FIG. 4c). By this re-holding operation of the holding device 5, the claw pieces 9a, 13a clamp the punched steel plate 3, which is at the same level as the claw pieces 9a, 13a, of the punched steel plate layer A supported on the pedestal 21. Therefore, the parts below the punched steel plate 3 held by the claws 9a and 13a are no longer held by the holding device 5. After the re-holding operation of the holding device 5, the positioning air cylinder 17
When the positioning table 20 is lowered by
0 (or the cradle 21 may be lowered by itself a little later than the positioning table 20), and the bed 1
It returns to its original position below the top surface. The predetermined number of punched steel plates 3 that have been removed from the holding device 5 as described above are lowered as the pedestal 21 is lowered and placed on the upper surface of the bed 1 (as shown in FIGS. 1 and 2). (See the two-dot chain line in Figure 2). After that, the rod 25a of the transfer air cylinder 25 is advanced,
The punched steel plate 3 placed on the bed 1 is taken out to a desired position, that is, sent to the next process by a push plate 26. The above-mentioned stacking cycle is repeated one after another to continuously stack stamped steel plates with a predetermined lamination thickness, and the stacked stamped steel plates (stator core material) are then subjected to an inspection process. The products are sent to the factory where they are inspected for thickness, etc., and only good products are sent to the welding process. In this welding process, the stator core material C is held in a jig 27 as shown in FIG.
The stator core materials C are stacked in multiple stages with separating steel plates 28 interposed between them, and in this state, the stamped steel plates of each stator core material C are joined together using a welding machine to form a stator core D as shown in FIG. be done.

このように本実施例によれば、マガジン4に収
納された打抜き鋼板層Aから所定の積層厚さの打
抜き鋼板を自動的に積取ることができる。
As described above, according to this embodiment, punched steel plates having a predetermined stacking thickness can be automatically stacked from the punched steel plate layer A stored in the magazine 4.

ところで、この種の装置にあつて、本実施例の
ような受け台21が設けられていないと、保持装
置による保持が解かれると、打抜き鋼板層は位置
決め台まで自然落下し、その際の衝撃等によつて
打抜き鋼板層が崩れるという問題があつた。そこ
で、打抜き鋼板のスロツトに嵌るガイドピンを設
けて、このガイドピンにより打抜き鋼板層の自然
落下を案内するように構成することが考えられる
が、これではガイド用として利用し得る孔のない
打抜き板に対しては適用できないという問題があ
つた。
By the way, in this type of device, if the cradle 21 as in this embodiment is not provided, when the holding device releases the punched steel plate layer, the punched steel plate layer will naturally fall to the positioning table, and the impact at that time will be There was a problem that the punched steel sheet layer collapsed due to the above-mentioned methods. Therefore, it is conceivable to provide a guide pin that fits into the slot of the punched steel plate and use this guide pin to guide the natural fall of the punched steel plate layer. There was a problem that it could not be applied to

これに対し本実施例では、保持装置5による保
持が解かれても、打抜き鋼板層Aはそのまま受け
台21に支持され、その後も受け台21に支持さ
れた状態で下降するので、従来の自然落下のもの
とは異なり、衝撃等によつて積取るべき打抜き鋼
板が崩れるといつた問題は全く生じない。従つ
て、ガイドピンを設けずとも済むので、ステータ
コア用の打抜き鋼板等の有孔のものに限らず、無
孔の打抜き板にも適用でき、汎用性が向上する。
On the other hand, in this embodiment, even if the holding device 5 releases the punched steel sheet layer A, the punched steel sheet layer A remains supported on the pedestal 21 and continues to descend while being supported on the pedestal 21, so that the conventional natural Unlike the case of falling, there is no problem of the punched steel plates to be stacked collapsing due to impact or the like. Therefore, since it is not necessary to provide a guide pin, the present invention can be applied not only to punched plates such as punched steel plates for stator cores with holes, but also to punched plates without holes, improving versatility.

さて、積取る打抜き鋼板の層厚は、受け台21
が第4図bの状態から位置決め台20に当接して
停止するまでの下降量(第4図b中Eで示す)と
同一に定められ、その受け台21の下降量は位置
決め台20の高さ位置によつて定められる。従つ
て、位置決め用エアシリンダ17のロツド17a
の上昇によりセツトされる位置決め台20の高さ
位置を調節すれば、積取る打抜き鋼板の層厚を調
節することができるが、本実施例ではロツド17
aの下端部に厚さゲージ23を着脱可能に取付け
て、ロツド17aの上昇量を調節し得るようにし
たので、厚さゲージ23を厚さの異なる他のもの
と交換することによつてロツド17aの上昇量従
つて位置決め台20のセツト高さを簡単に調節で
き、積取るべき打抜き鋼板の層厚調節の容易化を
図ることができる。
Now, the layer thickness of the punched steel plates to be stacked is as follows:
is determined to be the same as the amount of descent (indicated by E in FIG. 4b) from the state shown in FIG. Determined by location. Therefore, the rod 17a of the positioning air cylinder 17
The layer thickness of the punched steel plates to be stacked can be adjusted by adjusting the height position of the positioning table 20 set by the rise of the rod 17.
The thickness gauge 23 is removably attached to the lower end of the rod 17a so that the amount of rise of the rod 17a can be adjusted. The amount of rise of 17a and the set height of positioning table 20 can be easily adjusted, and the layer thickness of the punched steel plates to be stacked can be easily adjusted.

尚、上記実施例では、受け台21を打抜き鋼板
層Aに当接するまで上昇させるようにしたが、打
抜き鋼板層Aが自然落下してもその落下量が極く
小さければ、衝撃等によつて崩れる虞れはないか
ら、受け台21を打抜き鋼板層Aに当接するやや
手前の位置で停止させるようにしてもよい。ま
た、位置決め台20及び受け台21の上昇を同時
に行うようにしても差支えない。その他本発明は
上記し且つ図面に示す実施例に限定されるもので
はなく、その要旨を逸脱しない範囲で適宜変更し
て実施できる。
In the above embodiment, the pedestal 21 is raised until it comes into contact with the punched steel sheet layer A. However, even if the punched steel sheet layer A naturally falls, if the amount of fall is extremely small, it will not fall due to impact or the like. Since there is no risk of it collapsing, the pedestal 21 may be stopped at a position slightly before contacting the punched steel plate layer A. Further, the positioning table 20 and the receiving table 21 may be raised simultaneously. In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with appropriate modifications within the scope of the invention.

本発明は以上説明したように、積上げられた積
層板から、設定された所定の積層厚さの積層板を
一単位ずつ自動的に取出すことができると共に、
その取出す一単位の積層板の積層厚さの変更を容
易に行うことができる。しかも、保持装置の保持
解除による積層板の下降時にこれを受け部材によ
つて支持しながら下降させることができるので、
自然落下方式のものとは異なり、ガイドピン等を
設けなくとも、積取るべき積層板が崩れたりする
ことを防止できると共に、有孔の積層板に限らず
無孔の積層板にも適用できて汎用性が向上すると
いつた優れた効果を奏する積層板の定寸積取り装
置を提供し得る。
As explained above, the present invention is capable of automatically taking out laminates of a set predetermined lamination thickness one unit at a time from stacked laminates, and
The laminated thickness of one unit of the laminated plate to be taken out can be easily changed. Moreover, when the laminate is lowered by releasing the holding device, it can be lowered while being supported by the receiving member.
Unlike the natural fall type, it can prevent the stacked laminates from collapsing without the need for guide pins, etc., and can be applied not only to perforated laminates but also to non-perforated laminates. It is possible to provide a laminate board sizing device that exhibits excellent effects with improved versatility.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明の一実施例を示し、第1図は全体
の縦断面図、第2図は第1図中−線に沿う縦
断面図、第3図は爪片による挾持部分の拡大断面
図、第4図は積取り行程を説明するための概略
図、第5図は溶接工程を説明するための側面図、
第6図はステータコアの斜視図である。 図中、1はベツド、3は打抜き鋼板(積層板)、
5は保持装置、20は位置決め台(位置決め用部
材)、21は受け台(受け部材)、23は厚さゲー
ジ、24は移送装置である。
The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal sectional view of the whole, FIG. 2 is a longitudinal sectional view taken along the line - in FIG. 1, and FIG. 3 is an enlarged sectional view of the portion held by the claw pieces. , FIG. 4 is a schematic diagram for explaining the loading process, and FIG. 5 is a side view for explaining the welding process.
FIG. 6 is a perspective view of the stator core. In the figure, 1 is a bed, 3 is a punched steel plate (laminate plate),
5 is a holding device, 20 is a positioning stand (positioning member), 21 is a receiving stand (receiving member), 23 is a thickness gauge, and 24 is a transfer device.

Claims (1)

【特許請求の範囲】[Claims] 1 高さ位置調節可能で積取り行程時に積取る積
層板の積層厚さに対応した高さ位置にセツトされ
る位置決め用部材と、この位置決め用部材の上方
に設けられ積取り行程時に一旦上昇した後に前記
位置決め用部材に当接するまで下降する受け部材
と、常には積上げられた積層板を保持し前記受け
部材が上昇して積層板に略当接したときその保持
を解くと共に受け部材が下降して前記位置決め用
部材に当接したとき積層板を再保持する保持装置
と、この保持装置より下方に下降し該保持装置に
よる再保持から外された積層板を取出す移送装置
とを具備して成る積層板の定寸積取り装置。
1. A positioning member whose height is adjustable and is set at a height corresponding to the thickness of the laminates to be stacked during the stacking process, and a positioning member provided above this positioning member that is once raised during the stacking process. A receiving member that later descends until it comes into contact with the positioning member and a receiving member that normally holds the stacked laminates, and when the receiving member rises and substantially contacts the laminate, the holding member is released and the receiving member descends. a holding device that re-holds the laminate when it comes into contact with the positioning member, and a transfer device that descends below the holding device and takes out the laminate that has been removed from being re-held by the holding device. Laminate board sizing device.
JP9637279A 1979-07-27 1979-07-27 Sizing and taking device of laminated plate Granted JPS5619941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9637279A JPS5619941A (en) 1979-07-27 1979-07-27 Sizing and taking device of laminated plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9637279A JPS5619941A (en) 1979-07-27 1979-07-27 Sizing and taking device of laminated plate

Publications (2)

Publication Number Publication Date
JPS5619941A JPS5619941A (en) 1981-02-25
JPS6324777B2 true JPS6324777B2 (en) 1988-05-23

Family

ID=14163130

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9637279A Granted JPS5619941A (en) 1979-07-27 1979-07-27 Sizing and taking device of laminated plate

Country Status (1)

Country Link
JP (1) JPS5619941A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58329A (en) * 1981-06-25 1983-01-05 Amada Co Ltd Blanking machine
JP7272301B2 (en) * 2019-09-27 2023-05-12 株式会社デンソー clipping device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4883466A (en) * 1972-02-07 1973-11-07
JPS5439689B2 (en) * 1976-02-20 1979-11-29

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53166784U (en) * 1977-05-20 1978-12-27
JPS5729943Y2 (en) * 1977-08-23 1982-06-30

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4883466A (en) * 1972-02-07 1973-11-07
JPS5439689B2 (en) * 1976-02-20 1979-11-29

Also Published As

Publication number Publication date
JPS5619941A (en) 1981-02-25

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