JPH0543082Y2 - - Google Patents
Info
- Publication number
- JPH0543082Y2 JPH0543082Y2 JP1988121489U JP12148988U JPH0543082Y2 JP H0543082 Y2 JPH0543082 Y2 JP H0543082Y2 JP 1988121489 U JP1988121489 U JP 1988121489U JP 12148988 U JP12148988 U JP 12148988U JP H0543082 Y2 JPH0543082 Y2 JP H0543082Y2
- Authority
- JP
- Japan
- Prior art keywords
- rod
- spring
- shape memory
- memory alloy
- bias
- 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
- 238000005338 heat storage Methods 0.000 claims description 22
- 239000011232 storage material Substances 0.000 claims description 22
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 20
- 239000013526 supercooled liquid Substances 0.000 claims description 19
- 238000007711 solidification Methods 0.000 claims description 15
- 230000008023 solidification Effects 0.000 claims description 15
- 239000000284 extract Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 235000017281 sodium acetate Nutrition 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004781 supercooling Methods 0.000 description 4
- BDKLKNJTMLIAFE-UHFFFAOYSA-N 2-(3-fluorophenyl)-1,3-oxazole-4-carbaldehyde Chemical compound FC1=CC=CC(C=2OC=C(C=O)N=2)=C1 BDKLKNJTMLIAFE-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229940087562 sodium acetate trihydrate Drugs 0.000 description 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 229910001000 nickel titanium Inorganic materials 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 150000004684 trihydrates Chemical class 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Temperature-Responsive Valves (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は過冷却液体の任意固化装置に関し、特
に、潜熱放出型蓄熱材である過冷却液体を固化し
て潜熱を取り出すために用いる過冷却液体の任意
固化装置に関するものである。[Detailed description of the invention] [Field of industrial application] The present invention relates to an arbitrary solidification device for supercooled liquid, and in particular, to a supercooled liquid that is used to solidify a supercooled liquid that is a latent heat release type heat storage material and extract latent heat. This invention relates to a device for optional solidification of liquids.
一般に、潜熱放出型蓄熱材のうち、特に、無機
塩類の水和物は過冷却が大きく本来の融解温度で
は固化せず融点温度以下でも過冷却液体のままで
存在するものが多く、例えば酢酸ナトリウム・三
水和物では、融点が58℃であるにもかかわらず、
−30℃程度まで過冷却で液体のままで存在する。
このため前記無機塩類の水和物をその融点温度以
上に加熱した後、固化時にその潜熱を利用しよう
とする場合、前記無機塩類の水和物の過冷却を破
る手段が必要となつてくる。
In general, among latent heat release type heat storage materials, hydrates of inorganic salts in particular are highly supercooled and do not solidify at their original melting temperature, but exist as a supercooled liquid even below the melting point temperature, such as sodium acetate.・Even though the trihydrate has a melting point of 58℃,
It exists as a liquid when supercooled down to around -30℃.
For this reason, when the inorganic salt hydrate is heated above its melting point temperature and the latent heat thereof is to be utilized during solidification, a means is required to break the supercooling of the inorganic salt hydrate.
上記過冷却液体の過冷却を破る手段としては、
過冷却状態を確実に破るとともに、繰り返しの使
用に耐えることが要求され、従来、無機塩類の水
和物の代表である前記酢酸ナトリウム・三水和物
においては、ピロリン酸ナトリウム、リン酸ナト
リウム等の発核材料を添加して過冷却状態を被つ
て固化させていた。 As a means to break the supercooling of the supercooled liquid,
Sodium acetate trihydrate, which is a representative example of hydrated inorganic salts, is required to reliably break the supercooled state and to withstand repeated use.Sodium pyrophosphate, sodium phosphate, etc. A nucleating material was added and solidified under supercooled conditions.
しかしながら、上記の発核材料を添加した過冷
却液体である前記酢酸ナトリウム・三水和物にお
いては、80〜85℃以上に加熱すると、融点温度以
下となつた場合においても発核作用を示さず、確
実に潜熱が取り出せない場合があり、前記酢酸ナ
トリウム・三水和物等の過冷却液体の使用開始前
に加熱する際の加熱温度を、80〜85℃以下の温度
で行わざるをえなくなつてしまい、過冷却液体の
耐熱性が低下し、処理操作性が悪くなつてしまう
という問題点を有していた。 However, the above-mentioned sodium acetate trihydrate, which is a supercooled liquid to which the above-mentioned nucleating material has been added, shows no nucleating effect when heated above 80-85°C, even when the temperature is below the melting point. In some cases, it may not be possible to reliably extract the latent heat, and the heating temperature when heating the supercooled liquid such as sodium acetate trihydrate before starting use must be kept at a temperature of 80 to 85 degrees Celsius or lower. This has led to problems in that the heat resistance of the supercooled liquid deteriorates and processing operability deteriorates.
本考案は上記のような従来のもののもつ問題点
を解決したものであつて、過冷却液体の耐熱性に
悪影響を与えることなく、処理操作性を向上する
とともに、過冷却状態にある液体の過冷却を確実
に破ることができ、繰り返しの使用に耐える過冷
却液体の任意固化装置を提供することを目的とし
ている。 The present invention solves the problems of the conventional methods as described above, and improves processing operability without adversely affecting the heat resistance of supercooled liquid. The purpose of the present invention is to provide an optional solidification device for supercooled liquid that can reliably break cooling and withstand repeated use.
上記の目的を達成するために本考案は、過冷却
状態にある潜熱放出型蓄熱材に摺動摩擦力を付与
し、それにより潜熱を取り出すようになつた過冷
却液体の任意固化装置であつて、筒状部材に、そ
の内部を挿通して両端部が筒状部材から延出する
ロツドを移動可能に配設し、前記ロツドの一端側
に、前記ロツドを一方に付勢する形状記憶合金製
ばねを配設するとともに、前記ロツドの他端側
に、前記ロツドを他方に付勢するバイアスばねを
配設し、前記形状記憶合金製ばねの変形時に、前
記バイアスばねによりロツドが移動し、ロツドの
近傍に配設した密着部を有するコイル状のトリガ
ーばねを押圧変形させ摺動摩擦力を付与するよう
にした構成を有している。
In order to achieve the above object, the present invention is an optional solidification device for supercooled liquid, which applies sliding friction force to a latent heat release type heat storage material in a supercooled state, thereby extracting latent heat. A rod is movably inserted into the cylindrical member and has both ends extending from the cylindrical member, and a shape memory alloy spring is provided at one end of the rod to bias the rod in one direction. At the same time, a bias spring is disposed on the other end of the rod to bias the rod in the other direction, and when the shape memory alloy spring is deformed, the bias spring moves the rod, causing the rod to move. It has a configuration in which a coil-shaped trigger spring having a close contact portion disposed nearby is deformed under pressure to apply a sliding frictional force.
本考案は上記のような構成を採用したことによ
り、潜熱放出型蓄熱材である過冷却液体に過冷却
状態を破る摺動摩擦力を確実に付与することがで
き、過冷却液体を固化させて潜熱を取り出すこと
ができることとなる。
By adopting the above configuration, the present invention can reliably apply sliding friction force to break the supercooled state to the supercooled liquid, which is a latent heat release type heat storage material, and solidify the supercooled liquid to release latent heat. This means that it can be taken out.
以下、図面に示す本考案による実施例について
説明する。
Embodiments of the present invention shown in the drawings will be described below.
第１図および第２図には本考案による過冷却液
体の任意固化装置が示されていて、この任意固化
装置１は、筒状部材２に、その内部を挿通して両
端部が筒状部材２から延出するロツド３を移動可
能に配設し、前記ロツド３の一端にナツト４を固
着するとともに、このナツト４と前記筒状部材２
との間に形状記憶合金製ばね５を配設し、前記ロ
ツド３の他端を大径のヘツド部６に形成するとと
もに、このヘツド部６と前記筒状部材２との間に
バイアスばね７を配設する。 1 and 2 show an apparatus for optionally solidifying a supercooled liquid according to the present invention. This optional solidifying apparatus 1 is inserted into a cylindrical member 2 so that both ends of the cylindrical member are inserted into the cylindrical member 2. A rod 3 extending from the cylindrical member 2 is movably arranged, a nut 4 is fixed to one end of the rod 3, and the nut 4 and the cylindrical member 2 are connected to each other.
A shape memory alloy spring 5 is disposed between the rod 3 and the other end of the rod 3 to form a large diameter head portion 6, and a bias spring 7 is disposed between the head portion 6 and the cylindrical member 2. Place.
さらに、前記筒状部材２の略中央に一端を固定
されて前記バイアスばね７側のロツド３を覆う筒
状のハウジング８を設け、前記ロツド３のヘツド
部６側に、前記ハウジング８に上下端を固定され
るとともに、前記形状記憶合金製ばね５の常態時
には前記ヘツド部６と離間し、前記形状記憶合金
製ばね５の変形時には前記ヘツド部６が当接して
押圧変位させ摺動摩擦力を付与する密着部を有す
るコイル状のトリガーばね９を配設した構成を有
している。 Furthermore, a cylindrical housing 8 is provided which has one end fixed to approximately the center of the cylindrical member 2 and covers the rod 3 on the side of the bias spring 7. is fixed, and when the shape memory alloy spring 5 is in a normal state, it is separated from the head part 6, and when the shape memory alloy spring 5 is deformed, the head part 6 contacts and presses the spring 5, displacing it and applying a sliding friction force. It has a configuration in which a coil-shaped trigger spring 9 having a close contact portion is disposed.
次に、上記のように構成される本考案による任
意固化装置１の作用について説明する。 Next, the operation of the optional solidification device 1 according to the present invention configured as described above will be explained.
上記のように構成される本考案による任意固化
装置１にあつては、前記形状記憶合金製ばね５の
設定温度以上の場合には、前記筒状部材２の内部
を挿通するロツド３が、ロツド３の右端と前記筒
状部材２との間に配設される形状記憶合金製ばね
５による右方向への付勢力と、ロツド３の左端と
前記筒状部材２との間に配設されるバイアスばね
７による左方向への付勢力とで第１図の位置でバ
ランスを保ち、前記ロツド３のヘツド部６と前記
密着部を有するコイル状のトリガーばね８との間
は離間している。 In the optional solidification device 1 of the present invention configured as described above, when the temperature is higher than the set temperature of the shape memory alloy spring 5, the rod 3 inserted through the inside of the cylindrical member 2 is A biasing force in the right direction by a shape memory alloy spring 5 disposed between the right end of the rod 3 and the cylindrical member 2, and a biasing force disposed between the left end of the rod 3 and the cylindrical member 2. A balance is maintained in the position shown in FIG. 1 by the leftward urging force of the bias spring 7, and the head portion 6 of the rod 3 and the coil-shaped trigger spring 8 having the contact portion are spaced apart from each other.
そして、前記形状記憶合金製ばね５の設定温度
以下となり形状記憶合金製ばね５が変形した場合
には、ロツド３の右端と前記筒状部材２との間に
配設される形状記憶合金製ばね５が縮んでロツド
３への右方向へ付勢力がなくなり、前記ロツド３
の左端と前記筒状部材２との間に配設されるバイ
アスばね７によりロツド３が左方向に移動して、
第１図の状態よりも前記ロツド３が左側にずれた
位置である第２図に示す位置で前記筒状部材２の
内部を挿通するロツド３がバランスするようにな
り、この結果、前記ロツド３のヘツド部６で前記
密着部を有するコイル状のトリガーばね９を押圧
変形させ、摺動摩擦力を付与するものである。 When the temperature of the shape memory alloy spring 5 becomes lower than the set temperature of the shape memory alloy spring 5 and the shape memory alloy spring 5 deforms, the shape memory alloy spring disposed between the right end of the rod 3 and the cylindrical member 2 5 contracts and the biasing force toward the rod 3 in the right direction is lost, and the rod 3
The rod 3 is moved to the left by a bias spring 7 disposed between the left end of the rod and the cylindrical member 2,
At the position shown in FIG. 2, which is a position where the rod 3 is shifted to the left from the state shown in FIG. The head portion 6 presses and deforms the coil-shaped trigger spring 9 having the contact portion to apply a sliding friction force.
以下に上記の構成の任意固化装置１を蓄熱材パ
ツクに適用したものについて説明する。 An application of the optional solidification device 1 having the above configuration to a heat storage material pack will be described below.
第３図に示すようなポリプロピレン製フイルム
１２の周囲をヒートシールして、内部に潜熱放出
型の蓄熱材１１である酢酸ナトリウム・三水和物
の100ｇを封入するとともに、上記の本考案によ
る任意固化装置１を内蔵させた蓄熱材パツク１０
を用意する。 The periphery of the polypropylene film 12 as shown in FIG. Heat storage material pack 10 with built-in solidification device 1
Prepare.
上記任意固化装置１に用いる形状記憶合金製ば
ね５としては、ニツケル−チタン合金製で設定温
度が０℃で縮み変形して、前記第１図の状態から
第２図の状態に変形するものを用いた。また、こ
の蓄熱材パツク１０には、封入した蓄熱材１１の
温度を検知するための熱電対１３を蓄熱材１１に
接触するようにセツトした。 The shape memory alloy spring 5 used in the optional solidification device 1 is made of a nickel-titanium alloy and shrinks and deforms at a set temperature of 0°C, changing from the state shown in Fig. 1 to the state shown in Fig. 2. Using. Further, in this heat storage material pack 10, a thermocouple 13 for detecting the temperature of the enclosed heat storage material 11 was set so as to be in contact with the heat storage material 11.
まず、上記の蓄熱材パツク１０の全体を85℃の
温水浴中に約40分間浸漬して内部に封入される蓄
熱材１１を充分加熱した後、約−１℃に保たれて
いるエチレングリコールと水とからなる冷却浴中
に浸漬し、蓄熱材パツク１０中の蓄熱材１１の温
度変化を前記熱電対１３で測定した。 First, the entire heat storage material pack 10 described above is immersed in a hot water bath at 85°C for about 40 minutes to sufficiently heat the heat storage material 11 sealed inside, and then soaked in ethylene glycol kept at about -1°C. The temperature change of the heat storage material 11 in the heat storage material pack 10 was measured using the thermocouple 13.
上記の冷却浴で急冷される上記蓄熱材パツク１
０中の蓄熱材１１はその融点58℃で相変化を示す
ことなく温度が下がり続け、約５分後に0.6℃で
本考案による任意固化装置１が作動し、前記蓄熱
材１１である酢酸ナトリウム・三水和物の過冷却
が破れて固化し、約50℃まで蓄熱材１１の温度が
上昇し潜熱の放出を得た。 The above heat storage material pack 1 is rapidly cooled in the above cooling bath.
The temperature of the heat storage material 11 in 0.0 continues to drop without showing any phase change at its melting point of 58°C, and after about 5 minutes, the optional solidification device 1 according to the present invention operates at 0.6°C, and the heat storage material 11, sodium acetate, The supercooling of the trihydrate was broken and solidified, the temperature of the heat storage material 11 rose to about 50°C, and latent heat was released.
なお、上記の実施例ではニツケル−チタン合金
製で設定温度が０℃の形状記憶合金製ばねを用い
たが、設定温度は、たとえば酢酸ナトリウム・三
水和物であれば、約50〜−30℃の範囲のものが使
用可能であり、その他蓄熱材に応じて前記形状記
憶合金の種類およびその設定温度は任意に選択す
ることができる。 In the above example, a shape memory alloy spring made of nickel-titanium alloy with a set temperature of 0°C was used. ℃ range can be used, and the type of shape memory alloy and its set temperature can be arbitrarily selected depending on the heat storage material.
本考案は上記のように構成したので、過冷却状
態にある液体に、その融点温度以下の所望の設定
温度で変形する形状記憶合金製ばねの作用で物理
的な摺動摩擦力を付与できて、過冷却液体の過冷
却を確実に破り、潜熱を所望の温度で取り出すこ
とができ、しかも、従来の化学的な発核材料を使
用しないので、過冷却液体の耐熱温度に悪影響を
与えることなく処理操作性を向上させ、全体を小
型にできるとともに、繰り返し使用に対する信頼
性が大幅に向上するなどのすぐれた効果を有する
ものである。
Since the present invention is configured as described above, physical sliding friction force can be applied to the supercooled liquid by the action of the shape memory alloy spring that deforms at a desired set temperature below its melting point temperature. It is possible to reliably break the supercooling of the supercooled liquid and extract the latent heat at the desired temperature, and since it does not use conventional chemical nucleating materials, it can be processed without adversely affecting the allowable temperature limit of the supercooled liquid. This has excellent effects such as improved operability, the overall size can be reduced, and reliability with repeated use is greatly improved.
第１図および第２図は本考案による任意固化装
置を示し、第１図は形状記憶合金製ばねが変形し
ない常態時の説明図、第２図は形状記憶合金製ば
ねが変形してトリガーばねを作動して摺動摩擦力
を付与する変形時の説明図、第３図は本考案によ
る任意固化装置を蓄熱材パツクの内部に配設し
て、内部の温度を熱電対で調べる装置の説明図で
ある。
１……任意固化装置、２……筒状部材、３……
ロツド、４……ナツト、５……形状記憶合金製ば
ね、６……ヘツド部、７……バイアスばね、８…
…ハウジング、９……トリガーばね、１０……蓄
熱材パツク、１１……蓄熱材、１２……フイル
ム、１３……熱電対。
Figures 1 and 2 show the optional solidification device according to the present invention, Figure 1 is an explanatory diagram of the normal state in which the shape memory alloy spring is not deformed, and Figure 2 is an explanatory diagram of the shape memory alloy spring being deformed to form a trigger spring. Figure 3 is an explanatory diagram of a device in which the optional solidification device according to the present invention is disposed inside a heat storage material pack and the internal temperature is checked with a thermocouple. It is. 1... Optional solidification device, 2... Cylindrical member, 3...
Rod, 4... Nut, 5... Shape memory alloy spring, 6... Head portion, 7... Bias spring, 8...
... Housing, 9 ... Trigger spring, 10 ... Heat storage material pack, 11 ... Heat storage material, 12 ... Film, 13 ... Thermocouple.
Claims (1)
力を付与し、それにより潜熱を取り出すようにな
つた過冷却液体の任意固化装置１であつて、筒状
部材２に、その内部を挿通して両端部が筒状部材
２から延出するロツド３を移動可能に配設し、前
記ロツド３の一端側に、前記ロツド３を一方に付
勢する形状記憶合金製ばね５を配設するととも
に、前記ロツド３の他端側に、前記ロツド３を他
方に付勢するバイアスばね７を配設し、前記形状
記憶合金製ばね５の変形時に、前記バイアスばね
６によりロツド３が移動し、ロツド３の近傍に配
設した密着部を有するコイル状のトリガーばね９
を押圧変形させ摺動摩擦力を付与するようにした
ことを特徴とする過冷却液体の任意固化装置。 An optional solidification device 1 for supercooled liquid that applies a sliding friction force to a latent heat release type heat storage material in a supercooled state and thereby extracts latent heat. A rod 3 having both ends extending from the cylindrical member 2 is movably disposed, and a shape memory alloy spring 5 is disposed at one end of the rod 3 to bias the rod 3 in one direction. A bias spring 7 is disposed on the other end of the rod 3 to bias the rod 3 in the other direction, and when the shape memory alloy spring 5 is deformed, the bias spring 6 moves the rod 3 and the rod 3 is moved. A coil-shaped trigger spring 9 having a close contact portion disposed near 3.
A device for optionally solidifying a supercooled liquid, characterized in that a sliding friction force is applied by pressing and deforming the liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988121489U JPH0543082Y2 (en) | 1988-09-16 | 1988-09-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988121489U JPH0543082Y2 (en) | 1988-09-16 | 1988-09-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0242045U JPH0242045U (en) | 1990-03-23 |
| JPH0543082Y2 true JPH0543082Y2 (en) | 1993-10-29 |
Family
ID=31368540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988121489U Expired - Lifetime JPH0543082Y2 (en) | 1988-09-16 | 1988-09-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0543082Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7423601B2 (en) * | 2019-03-20 | 2024-01-29 | パナソニックホールディングス株式会社 | Supercooling release device, heat storage device and power device |
| WO2022019246A1 (en) | 2020-07-21 | 2022-01-27 | パナソニック株式会社 | Supercooling cancellation device, heat storage device, and power unit |
-
1988
- 1988-09-16 JP JP1988121489U patent/JPH0543082Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0242045U (en) | 1990-03-23 |
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