JPS6330545Y2 - - Google Patents
Info
- Publication number
- JPS6330545Y2 JPS6330545Y2 JP1983196568U JP19656883U JPS6330545Y2 JP S6330545 Y2 JPS6330545 Y2 JP S6330545Y2 JP 1983196568 U JP1983196568 U JP 1983196568U JP 19656883 U JP19656883 U JP 19656883U JP S6330545 Y2 JPS6330545 Y2 JP S6330545Y2
- Authority
- JP
- Japan
- Prior art keywords
- movable body
- water
- flange
- support
- scum skimmer
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 30
- 241000238634 Libellulidae Species 0.000 description 28
- 238000007667 floating Methods 0.000 description 9
- 230000007423 decrease Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000010802 sludge Substances 0.000 description 3
- 239000002352 surface water Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005339 levitation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
Landscapes
- Removal Of Floating Material (AREA)
Description
【考案の詳細な説明】
本考案は汚水水面の浮きかすを捕集するために
使用されるスカムスキマーに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scum skimmer used to collect floating debris on the surface of sewage water.
汚水処理設備においては、曝気した処理水中の
活性汚泥を沈澱させて分離する一方で、上澄水の
表面に浮遊している活性汚泥等の未分離の浮きか
すをスカムスキマーによつて捕集し、これをエア
リフト方式によつて曝気工程へ返送するか汚泥貯
留槽へ移送する場合がある。 In sewage treatment facilities, activated sludge in aerated treated water is sedimented and separated, while unseparated floating debris such as activated sludge floating on the surface of supernatant water is collected using a scum skimmer. This may be returned to the aeration process using an airlift method or transferred to a sludge storage tank.
この場合に使用されるスカムスキマーが第１図
に示されている。即ち従来のスカムスキマーは、
エアリフトパイプＡに接続される接続口部１０１
とこれより径大の膨出部１０２とを備えた筒体か
らなる支持体１００の上記膨出部１０２に上下移
動自在に筒状の可動体２００が内嵌合されたもの
であつた。 The scum skimmer used in this case is shown in FIG. In other words, the conventional scum skimmer is
Connection port 101 connected to air lift pipe A
A cylindrical movable body 200 was internally fitted into the bulging portion 102 of the support body 100, which is a cylindrical body having a bulging portion 102 having a larger diameter.
このようなスカムスキマーにあつては、同図に
示した可動体２００はそれ自体が水に浮くフロー
トとして構成されており、その上端の堰部２０１
を溢流してスカムスキマー内部に表面水と共に捕
集された浮きかすが上記したエアリフトパイプＡ
を通して上述のように曝気工程等へ返送され、こ
れによつてスカムスキマー内部の水が減少して可
動体２００に作用する浮力が小さくなると、それ
に応じて該可動体２００はその重量が上記浮力に
吊り合う位置まで下降し、再び可動体２００の堰
部２０１を表面水及び浮きかすが溢流してスカム
スキマーの内部に流れ込んで捕集され、上記した
曝気工程等への返送が繰り返される。 In the case of such a scum skimmer, the movable body 200 shown in the figure is configured as a float that floats on water, and the weir part 201 at the upper end of the movable body 200 is configured as a float that floats on water.
The floating scum that overflowed and was collected inside the scum skimmer along with the surface water is the air lift pipe A mentioned above.
As the water inside the scum skimmer decreases and the buoyant force acting on the movable body 200 becomes smaller, the movable body 200 changes its weight to the above-mentioned buoyant force. The movable body 200 descends to the suspended position, and surface water and floating debris overflow the weir portion 201 of the movable body 200 again, flow into the inside of the scum skimmer, and are collected, and the process of returning to the above-described aeration process etc. is repeated.
しかしながら従来のスカムスキマーでは、第１
図明示のように可動体２００が支持体１００の膨
出部１０２の上方へ抜け勝手になつているので、
処理水が所定の水位以上に達したときには可動体
２００が過浮揚によつて支持体１００の上方へ抜
け出てしまうおそれがある。また、処理水の水位
が所定の上限レベル以下に保たれているとして
も、エアリフトパイプＡの立ち上り部A1へのリ
フト用のエアａの供給が急に停止したときにはス
カムスキマーの内部へ流れ込む水の流れが急激に
止まることから管内に水が勢いをつけて充満する
ため、充満する勢いがスカムスキマー管内上水面
を盛上げるという現象が起り、上記したところと
同様に可動体２００が過浮揚によつて支持体１０
０から抜け出てしまうおそれがある。そこで、上
記のように可動体２００が支持体１００から抜け
出るのを未然に防止するために、同図のように支
持体１００に過浮揚防止用のアーム３００を取り
付け、このアーム３００の上端に形成した係止片
部３０１が可動体２００に係止してその過浮揚が
未然に防止されるようにしていたが、このように
するとアーム３００を余分に取り付けねばならな
い欠点を生じるばかりでなく、部品点数の増大化
をきたすので好ましくなる。 However, with conventional scum skimmers, the first
As shown in the figure, since the movable body 200 can be easily pulled out above the bulge 102 of the support body 100,
When the treated water reaches a predetermined water level or higher, there is a risk that the movable body 200 may slip out above the support body 100 due to excessive levitation. In addition, even if the water level of the treated water is kept below the predetermined upper limit level, if the supply of air a for lifting to the rising part A1 of the air lift pipe A suddenly stops, the water flowing into the inside of the scum skimmer Since the flow of water suddenly stops, water fills the pipe with force, and the filling force causes the water surface inside the scum skimmer pipe to swell, causing the movable body 200 to become overly buoyant, as described above. Support 10
There is a risk that it will slip away from 0. Therefore, in order to prevent the movable body 200 from slipping out of the support body 100 as described above, an arm 300 for preventing excessive levitation is attached to the support body 100 as shown in the figure, and a The locking piece 301 locks onto the movable body 200 to prevent the movable body 200 from overlevating. However, this method not only has the disadvantage of requiring an additional arm 300 to be attached, but also causes parts to be damaged. This is preferable because it increases the score.
また、第１図のスカムスキマーのように、その
内部の水量の増減に応じて可動体２００を浮沈さ
せつつ浮きかすを捕集する形式のものでは、可動
体２００が円滑に上下移動し得るか否かがその捕
集性能の良否に直接影響を及ぼすのであるが、捕
集性能を向上させるために支持体１００の膨出部
１０２と可動体２００との隙間Ｈを大きくして両
者間の摩擦力を小さくすることにより上記上下移
動の円滑性を確保しようとすると、その隙間Ｈが
大き過ぎる場合には該隙間Ｈからスカムスキマー
の内部へ流れ込む水量が増大して有効なエアリフ
ト作用を阻害する。したがつて上記隙間Ｈを適正
なものに設定するために支持体１００の膨出部１
０２と可動体２００とに高い寸法精度が要求さ
れ、このことが価格の高騰につながつている。さ
らに、支持体１００に膨出部１０２を有せしめる
ために該支持体１００を合成樹脂にて連続ブロー
成形する場合には、連続成形された複数の支持体
の相互間に形成される不要部分を切除する必要が
あることによる材料歩留まりの低下や成形技術の
高度性から上記した価格の高騰が一層助長されて
いる。 Furthermore, in a scum skimmer shown in FIG. 1, in which the movable body 200 floats and sinks to collect floating scum according to the increase or decrease in the amount of water inside the skimmer, it is difficult to move the movable body 200 up and down smoothly. In order to improve the collection performance, the gap H between the bulge 102 of the support 100 and the movable body 200 is increased to reduce the friction between them. If the smoothness of the vertical movement is attempted to be ensured by reducing the force, if the gap H is too large, the amount of water flowing into the scum skimmer from the gap H will increase, inhibiting the effective air lift effect. Therefore, in order to set the above-mentioned gap H to an appropriate value, the bulging portion 1 of the support body 100 is
02 and the movable body 200 are required to have high dimensional accuracy, which has led to a rise in prices. Furthermore, when the support 100 is continuously blow-molded with synthetic resin in order to have the bulge 102 on the support 100, unnecessary portions formed between a plurality of continuously molded supports are removed. The above-mentioned price hike is further exacerbated by the reduction in material yield due to the necessity of cutting and the sophistication of molding technology.
本考案は以上の事情に鑑みてなされたもので、
部品点数の増大をきたすことなく可動体の過浮揚
の確実に防止できるのみならず、支持体及び可動
体にそれほど高い寸法精度が要求されないにもか
かわらず高い捕集性能を備えた安価なスカムスキ
マーを提供することを目的とする。 This idea was made in view of the above circumstances.
An inexpensive scum skimmer that not only can reliably prevent overfloating of the movable body without increasing the number of parts, but also has high collection performance even though the support body and the movable body do not require very high dimensional accuracy. The purpose is to provide
この目的を達成するために、本考案は、筒体の
一端部に折り返し状の鍔部が形成されてなる支持
体の上記鍔部に上下移動自在に筒状の可動体が嵌
合され、この可動体の両端部全周に亘つて上記鍔
部に係止されて該可動体が上記鍔部から抜け出る
のを阻止する段付部がそれぞれ設けられ、下端部
の段付部を筒体に近接させると共に該段付部下面
をテーパ面にしている点に特徴を有する。 In order to achieve this object, the present invention has a cylindrical movable body that is fitted into the flange of a support body in which a folded flange is formed at one end of the cylindrical body so as to be movable up and down. A stepped portion is provided around the entire circumference of both ends of the movable body to be locked to the flange to prevent the movable body from slipping out of the flange. It is characterized in that the stepped lower surface is tapered.
以下、図示した実施例にしたがつて本考案によ
るスカムスキマーを説明する。 Hereinafter, the scum skimmer according to the present invention will be explained according to the illustrated embodiment.
第２図に例示したスカムスキマーにおいて、支
持体１はポリ塩化ビニル等の合成樹脂を連続押出
成形して得られた成形品を所定の長さに分断する
ことによつて製作された円筒体の一端部に外向き
折り返し状の鍔部１１を形成してなる。また、そ
れ自体が水に浮くフロートとして構成された円筒
状の可動体２は、その上下両端部の全周に亘つて
内側へ突出する環状の段付部２１，２２が一体に
設けられている。これらの段付部２１，２２の内
周直径は上記した支持体１の鍔部１１の外周直径
よりもやや小径でかつ支持体１の外周直径よりも
やや大径に設定されていて、下端部の段付部２２
は円筒体に近接している。また、この可動体２は
ポリエチレン樹脂等の合成樹脂にて成形されたも
のであつて、上記鍔部１１または該可動体２の弾
性変形可能な特性を利用して上記鍔部１１に押し
込まれて上下移動自在に外嵌合されている。 In the scum skimmer illustrated in FIG. 2, the support 1 is a cylindrical body manufactured by continuously extruding a synthetic resin such as polyvinyl chloride and cutting a molded product into predetermined lengths. An outwardly folded flange 11 is formed at one end. Further, the cylindrical movable body 2, which is configured as a float that floats on water, is integrally provided with annular stepped portions 21 and 22 that protrude inward over the entire circumference of both upper and lower ends thereof. . The inner diameters of these stepped parts 21 and 22 are set to be slightly smaller than the outer diameter of the flange 11 of the support 1 and slightly larger than the outer diameter of the support 1. stepped portion 22 of
is close to the cylinder. The movable body 2 is molded from synthetic resin such as polyethylene resin, and is pushed into the flanges 11 by utilizing the elastically deformable characteristics of the flanges 11 or the movable bodies 2. It is externally fitted so that it can be moved up and down.
このようなスカムスキマーにおいては、同図明
示のように支持体１の下端部が接続口部としてエ
アリフトパイプＡに接続される。 In such a scum skimmer, the lower end of the support 1 is connected to the air lift pipe A as a connection port, as clearly shown in the figure.
上記において、処理水の表面の浮きかすの捕集
は第１図で説明したものと同様に可動体２の上端
の堰部２３を浮きかすと共に溢流してスカムスキ
マーの内部へ流れ込んだ水の量の増減に応じて可
動体２が浮沈することによりなされる。そして処
理水が所定の水位以上になつたときには、同図仮
想線イで示したように可動体２の下端部に形成さ
れている段付部２２が支持体１の鍔部１１に下方
から係止されてその過浮揚が阻止されるので、鍔
部１１から可動体２が上方へ抜け出ることはな
い。また、エアリフトパイプＡへのエアａの供給
が停止することによつてスカムスキマーの内部へ
流れ込む水の流れが急激に止まり、管内に勢いを
つけて充満する水によりスカムスキマー管内上水
面を盛り上げる場合も同様である。なお、処理水
の水位の低下に伴なう鍔部１１からの可動体２の
下方への抜け落ちは、可動体２の上端部に形成さ
れている段付部２１が鍔部１１に上方から係止さ
れることによつて阻止される。 In the above, the collection of floating dregs on the surface of the treated water is carried out in the same manner as explained in FIG. This is done by the movable body 2 rising and falling in accordance with the increase/decrease in . When the treated water reaches a predetermined water level or higher, the stepped part 22 formed at the lower end of the movable body 2 engages the collar part 11 of the support body 1 from below, as shown by the imaginary line A in the figure. Since the movable body 2 is stopped and prevented from floating excessively, the movable body 2 does not slip out upward from the collar portion 11. In addition, when the supply of air a to air lift pipe A is stopped, the flow of water flowing into the scum skimmer suddenly stops, and the water filling the pipe with force increases the water surface inside the scum skimmer pipe. The same is true. Note that if the movable body 2 falls off downward from the flange 11 due to a decrease in the water level of the treated water, the stepped portion 21 formed at the upper end of the movable body 2 engages the flange 11 from above. prevented by being stopped.
一方、可動体２の堰部２３以外からのスカムス
キマー内部への処理水の浸入は鍔部１１と可動体
２との隙間H1をできるだけ狭いものにして防ぐ
必要があり、その場合に可動体２の上下移動の円
滑性を確保する必要があるが、第２図で説明した
スカムスキマーにあつては、鍔部１１は筒体の端
部に折り返し状に形成されているからその肉厚が
薄く、したがつて可動体２が上下移動する際の鍔
部１１との摩擦力が第１図で説明したものよりも
必然的に小さくなる。このことから、第２図に示
した隙間H1を第１図に示した隙間Ｈより小さく
しても可動体２の上下移動の円滑性が損われない
ことは明らかである。したがつて支持体１の鍔部
１１及び可動体２に許容される寸法誤差範囲がそ
れだけ拡大され、それらの寸法精度として第１図
で説明した支持体１００及び可動体２００の寸法
精度ほど高いものが要求されなくなる。 On the other hand, it is necessary to prevent treated water from entering the scum skimmer from a source other than the dam 23 of the movable body 2 by making the gap H1 between the collar 11 and the movable body 2 as narrow as possible. It is necessary to ensure smooth vertical movement of the flange 11, but in the case of the scum skimmer explained in FIG. It is thin, and therefore the frictional force with the flange 11 when the movable body 2 moves up and down is inevitably smaller than that explained in FIG. 1. From this, it is clear that even if the gap H1 shown in FIG. 2 is made smaller than the gap H shown in FIG. 1, the smoothness of the vertical movement of the movable body 2 will not be impaired. Therefore, the range of dimensional errors allowed for the collar 11 of the support 1 and the movable body 2 is expanded accordingly, and the dimensional accuracy of the support 100 and the movable body 200 explained in FIG. 1 is higher. is no longer required.
さらに、可動体２の下端部に形成されている段
付部２２の内外面がいずれも所定の勾配を有する
テーパ面２２ａ，２２ｂとなつているので、第１
図に示した可動体２００に比べて、該可動体２の
上下移動の際の水抵抗が低減される。そのため、
可動体２の上下移動の円滑性が向上するので上述
した隙間H1を極力小さくすることが可能となり、
そのようにすれば該隙間H1からスカムスキマー
内部へ浸入する水に起因するエアリフト作用の低
下が抑制される。また、段付部２２を可動体２の
下端部全周に亘つて設け、しかも筒状体に近接さ
せると共にその外面をテーパ面２２ｂにしている
ので、可動体２の底面にスカムが滞ることがな
く、テーパ面をすべつて水面に浮かびあがり、可
動体の上下動をスムースにすることができる。ま
た、可動体２の上端部に形成されている段付部２
１の上面を図示例のように下窄まり状のテーパ面
２１ａとしておけば、堰部２３を溢流してくる表
面水及び浮きかすをスムーズにスカムスキマーの
内部へ捕集できる利点がある。 Furthermore, since both the inner and outer surfaces of the stepped portion 22 formed at the lower end of the movable body 2 are tapered surfaces 22a and 22b having a predetermined slope, the first
Compared to the movable body 200 shown in the figure, water resistance during vertical movement of the movable body 2 is reduced. Therefore,
Since the smoothness of the vertical movement of the movable body 2 is improved, the above-mentioned gap H1 can be made as small as possible,
In this way, a decrease in the air lift effect due to water entering the scum skimmer from the gap H1 can be suppressed. Further, since the stepped portion 22 is provided all around the lower end of the movable body 2, and is located close to the cylindrical body, and its outer surface is made into a tapered surface 22b, scum does not accumulate on the bottom surface of the movable body 2. Instead, it slides along the tapered surface and floats on the water surface, allowing the movable body to move up and down smoothly. In addition, a stepped portion 2 formed at the upper end of the movable body 2
If the upper surface of the scum skimmer 1 is formed into a tapered surface 21a with a downward convergence as shown in the illustrated example, there is an advantage that the surface water and floating debris overflowing the weir portion 23 can be smoothly collected into the inside of the scum skimmer.
以上の説明から明らかなように本考案によるス
カムスキマーは、支持体と該支持体に形成されて
いる鍔部に嵌合された可動体とを備え、かつ可動
体は該可動体が鍔部から抜け出るのを阻止する段
付部を両端部に有するものであるので、従来のよ
うにアーム等の余分な部品を用いることなく可動
体の過浮揚を確実に防止できるのみならず、支持
体と可動体とを分離せずにコンパクトな荷姿とし
て施工現場まで運べる利点がある。また、鍔部が
筒体の一端部に折り返し状に形成されているの
で、該鍔部と可動体との間の隙間を小さくしても
可動体の上下移動が両者の摩擦力によつて極端に
阻害されることがなく、したがつて支持体及び可
動体の許容される寸法誤差範囲が拡がり、従来の
ものほど支持体及び可動体に高い寸法精度が要求
されなくなる。加えて支持体を構成する筒体は実
施例で説明したように連続押出成形することがで
きるので、そのようにすれば成形品に不要部分が
生じなくなつて材料歩留まりが向上し、しかも成
形技術に冒頭で記したブロー成形におけるほど高
度性が要求されないので、価格低減が容易に達成
される。さらに、可動体下端の段付部は全周に亘
つて設けられ、筒体に近接させると共に該段付部
下面をテーパ面としているので、可動体の底面に
スカムが滞ることがなく、テーパ面をすべつて水
面に浮かびあがり、可動体の上下動をスムーズに
することができる。 As is clear from the above description, the scum skimmer according to the present invention includes a support body and a movable body fitted to a flange formed on the support body, and the movable body is connected to the flange from the flange. Since it has stepped parts on both ends to prevent it from slipping out, it not only reliably prevents the movable body from over-levitating without using extra parts such as arms as in the conventional case, but also prevents the movable body from slipping out. It has the advantage of being able to be transported to the construction site in a compact package without having to be separated from the body. In addition, since the flange is formed in a folded shape at one end of the cylinder, even if the gap between the flange and the movable body is made small, the vertical movement of the movable body is extremely difficult due to the frictional force between the two. Therefore, the permissible dimensional error range of the support and the movable body is widened, and the support and the movable body are not required to have as high dimensional accuracy as in the conventional case. In addition, the cylindrical body constituting the support body can be continuously extruded as explained in the examples, which eliminates unnecessary parts in the molded product, improves material yield, and improves molding technology. Since the sophistication required is not as high as in the blow molding mentioned at the beginning of , a cost reduction can be easily achieved. Furthermore, the stepped part at the lower end of the movable body is provided around the entire circumference and is close to the cylindrical body, and the stepped lower surface is a tapered surface, so scum does not accumulate on the bottom surface of the movable body, and the tapered surface It slides and floats to the surface of the water, allowing the movable body to move up and down smoothly.
第１図は従来のスカムスキマーを示す垂直断面
図、第２図は本考案実施例によるスカムスキマー
を示す垂直断面図である。
１……支持体、２……可動体、１１……鍔部、
２１，２２……段付部。
FIG. 1 is a vertical sectional view of a conventional scum skimmer, and FIG. 2 is a vertical sectional view of a scum skimmer according to an embodiment of the present invention. 1... Support body, 2... Movable body, 11... Flange part,
21, 22...Stepped portion.
Claims (1)
なる支持体の上記鍔部に上下移動自在に筒状の可
動体が嵌合され、この可動体の両端部全周に亘つ
て上記鍔部に係止されて該可動体が上記鍔部から
抜け出るのを阻止する段付部がそれぞれ設けら
れ、下端部の段付部を筒体に近接させると共に該
段付部下面をテーパ面にしていることを特徴とす
るスカムスキマー。 A cylindrical movable body is fitted into the flange of the support body, which has a folded flange formed at one end of the cylindrical body, so as to be able to move up and down. A stepped portion is provided to prevent the movable body from slipping out from the flange portion by being engaged with the flange portion, and the stepped portion at the lower end is brought close to the cylindrical body and the lower surface of the stepped portion is made into a tapered surface. A scum skimmer characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19656883U JPS60104290U (en) | 1983-12-20 | 1983-12-20 | scum skimmer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19656883U JPS60104290U (en) | 1983-12-20 | 1983-12-20 | scum skimmer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60104290U JPS60104290U (en) | 1985-07-16 |
| JPS6330545Y2 true JPS6330545Y2 (en) | 1988-08-16 |
Family
ID=30421648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19656883U Granted JPS60104290U (en) | 1983-12-20 | 1983-12-20 | scum skimmer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60104290U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5408516B2 (en) * | 2013-05-09 | 2014-02-05 | 健爾 北村 | A device to collect and remove dirt floating on the water surface |
| JP5552611B1 (en) * | 2013-09-13 | 2014-07-16 | 産機テクノス株式会社 | Floating oil suction device and separation tank |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5112456B2 (en) * | 1973-12-06 | 1976-04-20 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5112456U (en) * | 1974-07-15 | 1976-01-29 | ||
| JPS5673585U (en) * | 1979-11-09 | 1981-06-16 |
-
1983
- 1983-12-20 JP JP19656883U patent/JPS60104290U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5112456B2 (en) * | 1973-12-06 | 1976-04-20 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60104290U (en) | 1985-07-16 |
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