JPH0216848Y2 - - Google Patents
Info
- Publication number
- JPH0216848Y2 JPH0216848Y2 JP15746084U JP15746084U JPH0216848Y2 JP H0216848 Y2 JPH0216848 Y2 JP H0216848Y2 JP 15746084 U JP15746084 U JP 15746084U JP 15746084 U JP15746084 U JP 15746084U JP H0216848 Y2 JPH0216848 Y2 JP H0216848Y2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- lid member
- container body
- holding member
- stopper
- 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
- 238000005266 casting Methods 0.000 claims description 30
- 239000002184 metal Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 15
- 230000006837 decompression Effects 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Landscapes
- Casting Devices For Molds (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Manipulator (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は吸引鋳造装置に関し、詳しくは鋳型を
介して製品キヤビテイ内を減圧することにより溶
湯を製品キヤビテイ内に吸引充填する吸引鋳造装
置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a suction casting device, and more particularly to a suction casting device that suction-fills molten metal into a product cavity by reducing the pressure inside the product cavity through a mold.
鋳型の製品キヤビテイを減圧し、この製品キヤ
ビテイ内へ鋳型の湯口部を経て溶湯を吸引し、そ
の減圧状態を維持しつつ製品キヤビテイ内におい
て溶湯を凝固させるいわゆる吸引鋳造法は公知で
ある。かかる吸引鋳造法によれば、溶湯は溶湯の
液面に作用する圧力と製品キヤビテイ内の圧力と
の差圧によつて穏やかに製品キヤビテイ内へ導入
され、また凝固時にその減圧状態が維持される。
このため、湯回り不良やスラグの巻き込み等の鋳
造欠陥のない鋳物を製造することができる。
A so-called suction casting method is known in which the pressure of a product cavity in a mold is reduced, molten metal is sucked into the product cavity through a sprue of the mold, and the molten metal is solidified within the product cavity while maintaining the reduced pressure state. According to such a suction casting method, the molten metal is gently introduced into the product cavity by the pressure difference between the pressure acting on the liquid surface of the molten metal and the pressure inside the product cavity, and the reduced pressure state is maintained during solidification. .
Therefore, it is possible to produce a casting free from casting defects such as poor water flow and slag inclusion.
ところで、この吸引鋳造法では、鋳型を溶解炉
の上方まで搬送し、鋳型の湯口を溶湯中に浸漬す
るまで鋳型を下降させ、更に吸引鋳造後鋳型を上
昇させた後、後工程位置まで鋳型を搬送させる必
要がある。このとき、鋳型として通常使用される
生砂型、シエル砂型、セラミツクシエル鋳型、石
膏鋳型等は強度が低いため、上記の如く複雑に移
動させると鋳型が破損することがある。しかも、
鋳型に機械的な無理が生じるため、鋳造サイクル
時間の短縮、即ち、鋳込み時間以外の搬送時間の
短縮化には自ずと限界があつた。 By the way, in this suction casting method, the mold is transported to the upper part of the melting furnace, the mold is lowered until the sprue of the mold is immersed in the molten metal, and then the mold is raised after the suction casting, and then the mold is moved to the post-processing position. It is necessary to transport it. At this time, green sand molds, shell sand molds, ceramic shell molds, plaster molds, etc. that are commonly used as molds have low strength, so the molds may be damaged if they are moved in a complicated manner as described above. Moreover,
Since the mold is mechanically strained, there is a natural limit to shortening the casting cycle time, that is, shortening the transportation time other than the casting time.
また、従来の吸引鋳造法においては、鋳型の製
品キヤビテイ内への吸引によつて溶湯を吸い上げ
るのに必要な負圧を鋳型の製品キヤビテイ創成し
なければならないため、鋳型内外の差圧により発
生する応力により鋳型が浮上し、そのために鋳型
が破損したり、湯口部(ストーク)と鋳型の製品
キヤビテイを減圧するための容器本体との間に隙
間が生じ、溶湯が吸引できなくなることがある。 In addition, in the conventional suction casting method, the negative pressure necessary to suck up the molten metal by suction into the product cavity of the mold must be created in the product cavity of the mold, so the pressure difference between the inside and outside of the mold is generated. The stress causes the mold to float, which may cause the mold to break, or create a gap between the sprue (stoke) and the container body for reducing the pressure in the product cavity of the mold, making it impossible to suck the molten metal.
かかる問題を解決するために、従来鋳型の固定
および浮上防止策として、次のような方策が採ら
れてきた。 In order to solve this problem, the following measures have been taken to fix the mold and prevent it from floating.
(a) セラミツクフアイバー等の断熱材と鋳型と容
器(減圧チヤンバ)内壁との間に充填し、鋳型
を固定する方法。(a) A method of fixing the mold by filling the space between the mold and the inner wall of the container (decompression chamber) with an insulating material such as ceramic fiber.
(b) 容器の内壁形状の少なくとも一部を、鋳型の
外側形状に倣つた形状とすることにより鋳型を
固定する方法。(b) A method of fixing a mold by shaping at least a portion of the inner wall of the container into a shape that follows the outer shape of the mold.
(c) 鋳型の頂部を、容器内壁上端部に設置したス
プリングの反発力を利用して押さえることによ
り鋳型を固定する方法。(c) A method of fixing the mold by pressing the top of the mold using the repulsive force of a spring installed at the upper end of the inner wall of the container.
しかしながら、(a)の方法は生産性が著しく低い
という問題があり、(b)の方法は、鋳型形状、特に
鋳型高さが変化したときには使用できないために
汎用性に欠けるという問題があり、また(c)の方法
は、スプリングの強度が強過ぎると鋳型を破損す
ることがあり、逆にスプリングの強度が弱いと、
鋳型内外の差圧により発生する応力が強い場合に
は鋳型が浮上する等の問題を生じ、(b)の方法ほど
ではないが汎用性に欠けるという問題がある。更
には、スプリング自体も鋳造作業の繰り返しによ
つて徐々にへたり、特に高温にさらされる時に
は、一層劣化が促進され、長期の使用には交換等
が必要となる等の問題がある。
However, method (a) has the problem of extremely low productivity, and method (b) lacks versatility because it cannot be used when the mold shape, especially the mold height, changes. In method (c), if the spring strength is too strong, the mold may be damaged; conversely, if the spring strength is weak,
If the stress generated by the pressure difference between the inside and outside of the mold is strong, problems such as the mold floating will occur, and although this method is not as bad as method (b), it is still lacking in versatility. Furthermore, the spring itself gradually wears out due to repeated casting operations, and especially when exposed to high temperatures, the deterioration is further accelerated, necessitating replacement after long-term use.
上記問題は、次に述べる本考案の吸引鋳造装置
によつて解決される。
The above problem is solved by the suction casting device of the present invention which will be described below.
即ち、本考案の吸引鋳造装置は、鋳型を収容、
支持すると共に、実質的に密閉空間を形成する容
器本体と蓋部材とを有し、この容器本体には鋳型
の湯口部が貫通できる孔が設けられ、また容器本
体と蓋部材のいずれか一方には減圧用のポートが
設けられている吸引鋳造装置であつて、
前記蓋部材には、鋳型の頂部方向に向けて昇降
可能な鋳型押さえ部材と、この鋳型押さえ部材の
脱落を防止する第1のストツパが取り付けられ、
かつ蓋部材を貫通して鋳型押さえ部材を所定位置
に固定する第2のストツパが設けられていること
を特徴としている。 That is, the suction casting device of the present invention accommodates a mold,
It has a container body and a lid member that support and form a substantially sealed space, and the container body is provided with a hole through which the sprue of the mold can pass, and either the container body or the lid member has a hole that allows the sprue of the mold to pass through. is a suction casting device equipped with a port for decompression, and the lid member includes a mold holding member that can be raised and lowered toward the top of the mold, and a first mold holding member that prevents the mold holding member from falling off. A stopper is attached,
In addition, a second stopper is provided that penetrates the lid member and fixes the mold holding member in a predetermined position.
本考案の吸引鋳造装置によれば、まず容器本体
に鋳型を収容し、鋳型の湯口部(ストーク)を容
器本体の底部に設けた孔から突出させる。次瑠
で、蓋部材を容器本体にかぶせる。このとき、鋳
型押さえ部材は鋳型の頂部に当接する。この状態
で、第2のストツパを鋳型押さえ部材に当接させ
ることにより、鋳型が所定位置に支持される。
According to the suction casting apparatus of the present invention, a mold is first housed in a container body, and the sprue portion (stalk) of the mold is made to protrude from a hole provided at the bottom of the container body. At the next step, cover the container body with the lid member. At this time, the mold holding member comes into contact with the top of the mold. In this state, the mold is supported in a predetermined position by bringing the second stopper into contact with the mold holding member.
次に、本考案の実施例を図面を参考にして説明
する。
Next, embodiments of the present invention will be described with reference to the drawings.
(第1実施例)
本考案の第1実施例を第1図に基づいて説明す
る。(First Example) A first example of the present invention will be described based on FIG.
ここで、第1図は本考案の第1実施例に係る吸
引鋳造装置の断面図である。 Here, FIG. 1 is a sectional view of a suction casting apparatus according to a first embodiment of the present invention.
図中、1は吸引鋳造法に使用する密閉可能な容
器(減圧チヤンバ)であり、箱形または有底円筒
体形状の容器本体2と、この容器本体2の開口部
を覆う蓋部材3とからなる。この容器本体2の底
部の略中央には孔4が設けられており、鋳物砂や
石膏等の鋳型材料で構成された鋳型5と一体に、
あるいは別体で形成された鋳型5の湯口部に相当
するストーク6が挿通される。容器本体2の上端
にはフランジ部2aが設けられ、蓋部材3の周辺
部と相当することにより実質的に密閉空間を形成
する。このフランジ部2aと蓋部材3の周辺部の
間にはシール材としてのOリング7が介装されて
いる。 In the figure, 1 is a sealable container (decompression chamber) used in the suction casting method, and is composed of a container body 2 in the shape of a box or a cylindrical body with a bottom, and a lid member 3 that covers the opening of the container body 2. Become. A hole 4 is provided approximately at the center of the bottom of the container body 2, and is integrated with a mold 5 made of mold material such as foundry sand or plaster.
Alternatively, a stalk 6 corresponding to a sprue portion of a separately formed mold 5 is inserted. A flange portion 2a is provided at the upper end of the container body 2, and corresponds to the peripheral portion of the lid member 3, thereby forming a substantially sealed space. An O-ring 7 as a sealing material is interposed between the flange portion 2a and the peripheral portion of the lid member 3.
蓋部材3は中央の突出部3aとその周囲の平板
部3bとからなる。突出部3a内の空間には、突
出部3aの上壁面から下方に向けて、鋳型押さえ
部材8を支持する支持部材9が取り付けられてい
る。この支持部材9の先端には、第1のストツパ
10が設けられており、鋳型押さえ部材8の落下
を防止する。鋳型押さえ部材8は、支持部材9に
摺動自在に嵌挿されており、直接鋳型5を押さえ
る先端部8aは、鋳型5を傷つけないようセラミ
ツクフアイバー等で形成されている。 The lid member 3 consists of a central protrusion 3a and a surrounding flat plate part 3b. A support member 9 that supports the mold holding member 8 is attached to the space within the protrusion 3a downward from the upper wall surface of the protrusion 3a. A first stopper 10 is provided at the tip of the support member 9 to prevent the mold holding member 8 from falling. The mold holding member 8 is slidably inserted into the support member 9, and the tip portion 8a that directly presses the mold 5 is formed of ceramic fiber or the like so as not to damage the mold 5.
また、突出部3aの側部には孔11が設けら
れ、鋳型押さえ部材8に向けて第2のストツパ1
2が進退自在に取り付けられている。この第2の
ストツパ12と突出部3aの側部との間には、シ
ール材としてのOリング13が介装されている。
この第2のストツパ12は、シリンダ、ネジ等の
適宜手段で駆動する。なお、鋳型押さえ部材8の
第2のストツパ12の当接個所にはテーパが設け
られており、第2のストツパ12の先端形状はそ
のテーパに対応した形状とされている。 Further, a hole 11 is provided on the side of the protrusion 3a, and a second stopper 1 is provided toward the mold holding member 8.
2 is attached so that it can move forward and backward. An O-ring 13 as a sealing material is interposed between the second stopper 12 and the side of the protrusion 3a.
This second stopper 12 is driven by an appropriate means such as a cylinder or a screw. Note that a taper is provided at the contact portion of the mold holding member 8 with the second stopper 12, and the shape of the tip of the second stopper 12 is made into a shape corresponding to the taper.
また、蓋部材3の平板部3bには、図示しない
真空ポンプ等の減圧手段に接続するためのポート
14が形成されている。 Further, a port 14 is formed in the flat plate portion 3b of the lid member 3 for connection to a pressure reducing means such as a vacuum pump (not shown).
次に、本実施例に係る吸引鋳造装置を用いて、
吸引鋳造法を実施する要領について説明する。 Next, using the suction casting device according to this example,
The procedure for carrying out the suction casting method will be explained.
まず、容器(減圧チヤンバ)1を開き、鋳型5
をこの容器1内にストーク6を孔4から突出させ
た状態で配置する。次いで、蓋部材3を容器本体
2上に載置し、容器1を密閉する。このとき、支
持部材9の下端の第1のストツパ10に支持され
ている鋳型押さえ部材8は、蓋部材3の下降に伴
い途中で鋳型5の上端部に当りそれ以上移動しな
くなる。しかし、蓋部材3は更に容器本体2と一
体になるまで下降する。この間、蓋部材3と一体
の支持部材9も蓋部材3と共に下降する。 First, open the container (vacuum chamber) 1 and mold 5.
is placed in this container 1 with the stalk 6 protruding from the hole 4. Next, the lid member 3 is placed on the container body 2, and the container 1 is sealed. At this time, the mold holding member 8 supported by the first stopper 10 at the lower end of the support member 9 hits the upper end of the mold 5 on the way as the lid member 3 is lowered and does not move any further. However, the lid member 3 further descends until it becomes integral with the container body 2. During this time, the support member 9 integrated with the lid member 3 also descends together with the lid member 3.
容器本体2と蓋部材3が一体となつたところ
で、第2のストツパ12を鋳型押さえ部材8に向
かつて進め、押圧して鋳型押さえ部材8を固定す
る。次いで、容器1全体を移動させ、鋳型5のス
トーク6の先端部を図示しない溶湯貯容容器内に
貯容された溶湯中に浸漬する。続いて、減圧手段
を作動させて容器1のポート14を介して容器1
内を減圧し、これにより鋳型5の製品キヤビテイ
15を鋳型5を介して−400〜−600mmHg程度に
減圧し、溶湯を製品キヤビテイ15内へ吸引注入
する。なお、この場合、鋳造作業の効率化を図る
べく、ストーク6の先端部を溶湯の液面下に浸漬
する前に、減圧手段による容器1内の減圧化を開
始してもよい。次いで、製品キヤビテイ15内に
導入された容湯を、容器1内の減圧状態を維持し
つつ凝固させる。製品キヤビテイ15内の溶湯が
凝固したのち、減圧を中止すると、鋳型5のスト
ーク6内に吸い上げられた未凝固の溶湯は、スト
ーク6の下端から図示しない溶湯貯容容器内へ落
下する。製品キヤビテイ15内の溶湯が完全に凝
固した後、容器1を開き、鋳造された鋳型5を取
り出す。そして、型ばらしを行い製品を得る。 When the container body 2 and the lid member 3 are integrated, the second stopper 12 is advanced toward the mold holding member 8 and pressed to fix the mold holding member 8. Next, the entire container 1 is moved, and the tip of the stalk 6 of the mold 5 is immersed in the molten metal stored in a molten metal storage container (not shown). Subsequently, the pressure reducing means is activated to remove the container 1 through the port 14 of the container 1.
The internal pressure is reduced, thereby reducing the pressure in the product cavity 15 of the mold 5 to about -400 to -600 mmHg through the mold 5, and the molten metal is sucked and injected into the product cavity 15. In this case, in order to improve the efficiency of the casting operation, the pressure reduction in the container 1 by the pressure reduction means may be started before the tip of the stalk 6 is immersed below the surface of the molten metal. Next, the hot water introduced into the product cavity 15 is solidified while maintaining the reduced pressure inside the container 1. When the pressure reduction is stopped after the molten metal in the product cavity 15 has solidified, the unsolidified molten metal sucked up into the stalk 6 of the mold 5 falls from the lower end of the stalk 6 into a molten metal storage container (not shown). After the molten metal in the product cavity 15 has completely solidified, the container 1 is opened and the cast mold 5 is taken out. Then, the mold is broken down to obtain a product.
以上の鋳造作業中、容器1は容器本体2のフラ
ンジ部2aに係合する爪部を有するクランプ装置
(図示せず)によつて、所定位置まで搬送される。 During the above casting operation, the container 1 is transported to a predetermined position by a clamp device (not shown) having a claw portion that engages with the flange portion 2a of the container body 2.
本実施例の吸引鋳造装置によれば、鋳型5は鋳
型押さえ部材8により軽く押さえられた状態で固
定されるので、鋳型5を破損することなく鋳型の
浮上を防止することができる。 According to the suction casting apparatus of this embodiment, the mold 5 is fixed while being lightly pressed by the mold pressing member 8, so that floating of the mold can be prevented without damaging the mold 5.
また、鋳型の固定作業としては、蓋部材3を容
器本体2上に載置した後、第2のストツパ12を
移動させて鋳型押さえ部材8を固定するだけでよ
いため、作業性がよく、生産性が向上する。 In addition, the work of fixing the mold is as simple as placing the lid member 3 on the container body 2 and then moving the second stopper 12 to fix the mold holding member 8, which improves work efficiency and improves productivity. Improves sex.
(第2実施例)
次に、本考案の第2実施例を第2図に基づいて
説明する。(Second Embodiment) Next, a second embodiment of the present invention will be described based on FIG. 2.
ここで、第2図は本考案の第2実施例に係る吸
引鋳造装置の断面図である。 Here, FIG. 2 is a sectional view of a suction casting apparatus according to a second embodiment of the present invention.
第2実施例の吸引鋳造装置において、第1実施
例と異なる点は、蓋部材3の中央に設けられた突
出部3aに貫通孔16が設けられ、この貫通孔1
6に、一端に鋳型を傷つけないように緩衝材から
なる先端部8aを有し、他端に落下防止のための
第1のストツパ10を備えた鋳型押さえ部材8が
摺動自在に挿入されており、この突出部3aと鋳
型押さえ部材8との間にはシール材としてのOリ
ング17が介装されていることにある。他と実質
的に第1実施例と同じである。 The suction casting apparatus of the second embodiment differs from the first embodiment in that a through hole 16 is provided in a protrusion 3a provided at the center of the lid member 3;
6, a mold holding member 8 having a tip 8a made of a cushioning material at one end to prevent damage to the mold and a first stopper 10 to prevent falling at the other end is slidably inserted. An O-ring 17 as a sealing material is interposed between the protrusion 3a and the mold holding member 8. The rest is substantially the same as the first embodiment.
なお、作用、効果については、第1実施例と実
質的に同じため、説明を省略する。 Note that since the functions and effects are substantially the same as those of the first embodiment, their explanations will be omitted.
以上、本考案の特定の実施例について説明した
が、本考案は、この実施例に限定されるものでは
なく、実用新案登録請求の範囲に記載の範囲内で
種々の実施態様が包含されるものである。 Although a specific embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and includes various embodiments within the scope of the claims for utility model registration. It is.
以上より、本考案の吸引鋳造装置によれば、簡
単な方法で、鋳型を破損させることなく鋳型の浮
上防止を図ることができ、生産性が大幅に向上す
る。
As described above, according to the suction casting apparatus of the present invention, it is possible to prevent the mold from floating in a simple manner without damaging the mold, and productivity is greatly improved.
第1図は本考案の第1実施例に係る吸引鋳造装
置の断面図、第2図は本考案の第2実施例に係る
吸引鋳造装置の断面図である。
1……容器(減圧チヤンバ)、2……容器本体、
2a……フランジ部、3……蓋部材、3a……突
出部、3b……平板部、4,11……孔、5……
鋳型、6……ストーク(湯口部)、7,13,1
7……Oリング、8……鋳型押さえ部材、9……
支持部材、10……第1のストツパ、12……第
2のストツパ、14……ポート、15……製品キ
ヤビテイ、16……貫通孔。
FIG. 1 is a cross-sectional view of a suction casting apparatus according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of a suction casting apparatus according to a second embodiment of the present invention. 1... Container (decompression chamber), 2... Container body,
2a...flange part, 3...lid member, 3a...protrusion part, 3b...flat plate part, 4, 11...hole, 5...
Mold, 6...Stoke (gate part), 7, 13, 1
7... O-ring, 8... Mold holding member, 9...
Support member, 10...first stopper, 12...second stopper, 14...port, 15...product cavity, 16...through hole.
Claims (1)
間を形成する容器本体と蓋部材とを有し、この容
器本体には鋳型の湯口部が貫通できる孔が設けら
れ、また容器本体と蓋部材のいずれか一方には減
圧用のポートが設けられている吸引鋳造装置であ
つて、 前記蓋部材には、鋳型の頂部方向に向けて昇降
可能な鋳型押さえ部材と、この鋳型押さえ部材の
脱落を防止する第1のストツパとが取り付けら
れ、かつ蓋部材を貫通して鋳型押さえ部材を所定
位置に固定する第2のストツパが設けられている
ことを特徴とする吸引鋳造装置。[Claims for Utility Model Registration] It has a container body and a lid member that accommodate and support a mold and form a substantially sealed space, and the container body is provided with a hole through which the sprue of the mold can pass. Further, the suction casting device is provided with a depressurizing port on either the container body or the lid member, and the lid member includes a mold holding member that can be raised and lowered toward the top of the mold; Suction casting characterized in that a first stopper is attached to prevent the mold holding member from falling off, and a second stopper is provided that penetrates the lid member and fixes the mold holding member in a predetermined position. Device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15746084U JPH0216848Y2 (en) | 1984-10-18 | 1984-10-18 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15746084U JPH0216848Y2 (en) | 1984-10-18 | 1984-10-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6172359U JPS6172359U (en) | 1986-05-16 |
JPH0216848Y2 true JPH0216848Y2 (en) | 1990-05-10 |
Family
ID=30715453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15746084U Expired JPH0216848Y2 (en) | 1984-10-18 | 1984-10-18 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0216848Y2 (en) |
-
1984
- 1984-10-18 JP JP15746084U patent/JPH0216848Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6172359U (en) | 1986-05-16 |
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