JPH087114B2 - Fine substance adsorption sampling device - Google Patents
Fine substance adsorption sampling deviceInfo
- Publication number
- JPH087114B2 JPH087114B2 JP2122919A JP12291990A JPH087114B2 JP H087114 B2 JPH087114 B2 JP H087114B2 JP 2122919 A JP2122919 A JP 2122919A JP 12291990 A JP12291990 A JP 12291990A JP H087114 B2 JPH087114 B2 JP H087114B2
- Authority
- JP
- Japan
- Prior art keywords
- bar
- charging electrode
- adsorption
- electrode bar
- electrode
- 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 - Fee Related
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N2001/002—Devices for supplying or distributing samples to an analysing apparatus
- G01N2001/007—Devices specially adapted for forensic samples, e.g. tamper-proofing, sample tracking
Landscapes
- Sampling And Sample Adjustment (AREA)
Description
本発明は、繊維片や毛髪や土砂等の微物を静電気によ
り吸着して採取する微物吸着採取装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fine substance adsorption / collection device that electrostatically adsorbs and collects fine substances such as fiber pieces, hair, and sand.
従来、例えば犯罪捜査に当たり、犯罪現場に犯人が残
した肉眼では確認しにくい足跡や繊維片や毛髪等を採取
するには、種々の方法が採られていたが、概して高度の
技術と手間がかかるものであった。 そこで、その採取を容易に行えるように、高電圧印加
による静電気を利用して採取するようにしたものとし
て、実開平１−132952号公報に開示されているような微
物採取装置、また剥離帯電による静電気を利用して採取
するものとして、実開平１−137452号公報に開示されて
いるような微物採取フィルムが知られている。Conventionally, for example, in criminal investigations, various methods have been adopted to collect footprints, fiber fragments, hair, etc. that are difficult to confirm with the naked eye at the crime scene, but generally require high technology and labor. It was a thing. Therefore, in order to facilitate the collection, as a sample collected by utilizing static electricity due to application of a high voltage, a fine particle collecting device as disclosed in Japanese Utility Model Laid-Open No. 1-132952, and peeling charging A fine object collecting film as disclosed in Japanese Utility Model Laid-Open No. 1-137452 is known to be collected by using the static electricity by the method.
しかし、前者の微物採取装置は、アルミ電極板を上下
両側から塩化ビニール板で挟んでサンドイッチ構造とし
た採取板を、手押し車に起伏自在に装着したもので、携
帯には適さない。また、その採取板は、アルミ電極板に
塩化ビニール板を張りつけたものであるため、高電圧印
加（電源オン）により塩化ビニール板を帯電させてこれ
に微物を吸着させることができても、電源を切ったとき
の逆電流により塩化ビニール板が逆帯電してしまい、そ
れまで吸着していた微物が再び離れるという問題があ
る。更に、凹凸のある面に対しては適用できない。 一方、後者の微物採取フィルムは、合成樹脂シートの
裏面に粘着層を設け、この粘着層により離型紙を重合さ
せたもので、携帯には便利であるが、離型紙を剥離した
際の剥離帯電によって合成樹脂シートを帯電させるもの
で、その帯電電位が弱く、しかも一般に剥離帯電は、電
位にムラが生じやすいとともに、プラス帯電部分とマイ
ナス帯電部分とが、合成樹脂シートの表面に複雑な帯電
模様を形成して無数に混在した状態となるので、十分か
つ均一な吸着力を得ることができないため、限られたも
のしか採取できない。 そこで、本発明の目的は、従来のこのような問題点を
解決し、均一かつ強力な吸着力により微物を的確に採取
でき、しかも携帯に便利であるばかりでなく、操作性や
安全性も良い微物吸着採取装置を提供することにある。However, the former fines collecting device is not suitable for carrying because it has a sandwiching plate, which has a sandwich structure in which an aluminum electrode plate is sandwiched between vinyl chloride plates from above and below, so that it can be lifted up and down. In addition, since the sampling plate is a vinyl chloride plate attached to an aluminum electrode plate, even if the vinyl chloride plate can be charged by applying a high voltage (power on) to adsorb a minute substance, There is a problem that the vinyl chloride plate is reversely charged by the reverse current when the power is turned off, and the fine substances that have been adsorbed until then are separated again. Furthermore, it cannot be applied to a surface having irregularities. On the other hand, the latter fines collection film is a synthetic resin sheet provided with an adhesive layer on the back side, and the release paper is polymerized by this adhesive layer, which is convenient for carrying, but peels off when the release paper is peeled off. It charges the synthetic resin sheet by charging, and its charging potential is weak, and in general, peeling charging tends to cause unevenness in the potential, and the positive charging portion and the negative charging portion have complicated charging on the surface of the synthetic resin sheet. Since a pattern is formed and there are innumerable mixed states, a sufficient and uniform suction force cannot be obtained, so that only a limited number can be collected. Therefore, an object of the present invention is to solve the above-mentioned problems of the related art, to accurately collect a fine substance by a uniform and strong adsorption force, and not only to be convenient to carry, but also to be easy to operate and safe. An object is to provide a good fine matter adsorption and collection device.
本発明による微物吸着採取装置は、高圧電源装置等を
内蔵した本体１と片手で操作できる帯電電極バー２と高
圧ケーブル３と可撓性の絶縁材製吸着採取シート４とか
らなる。 帯電電極バー２は、合成樹脂製の絶縁バー14の下面
に、その軸線方向に所定の間隔をおいて多数の電極針16
を配列植設し、これら電極針16を絶縁バー14に埋設され
た心線15と電気的に結合させ、またこれら電極針16をそ
の配列の両側から保護するため、合成樹脂製の２本の電
極針保護バー17を絶縁バー14に平行に架設し、絶縁バー
14の基端部をコネクタ部2aとしたものである。 高圧ケーブル３は、本体１から延長され、帯電電極バ
ー２のコネクタ部2aと着脱自在に接合して心線15と電気
接続するため、帯電電極バー２のグリップを兼ねる先端
コネクタ21を先端に設けたものである。 吸着採取シート４は、帯電電極バー２を対向させなが
ら移動させることにより、その多数の電極針16の放電に
よって生じるイオンにより帯電される。The fine substance adsorption / collection device according to the present invention comprises a main body 1 having a built-in high-voltage power supply device, a charging electrode bar 2 which can be operated by one hand, a high-voltage cable 3, and a flexible insulating adsorption / collection sheet 4. The charging electrode bar 2 has a large number of electrode needles 16 on the lower surface of an insulating bar 14 made of synthetic resin at predetermined intervals in the axial direction.
2 are made of synthetic resin in order to electrically connect the electrode needles 16 to the core wires 15 embedded in the insulating bar 14 and to protect the electrode needles 16 from both sides of the array. Install the electrode needle protection bar 17 in parallel with the insulation bar 14
The base end portion of 14 is the connector portion 2a. The high-voltage cable 3 is extended from the main body 1 and is detachably joined to the connector portion 2a of the charging electrode bar 2 to electrically connect to the core wire 15. Therefore, a tip connector 21 also serving as a grip of the charging electrode bar 2 is provided at the tip. It is a thing. The adsorption / collection sheet 4 is charged by the ions generated by the discharge of the many electrode needles 16 by moving the charging electrode bar 2 while facing each other.
微物の存在が予想される面に吸着採取シートを当て、
その上を無接触で走査するように高電圧をかけながら帯
電電極バーを動かすと、帯電電極バーの多数の電極針に
よる放電で生じたイオンによって吸着採取シートが帯電
し、これに静電気によって微物が吸着する。この場合、
帯電電極バーは、高圧ケーブルの先端コネクタをグリッ
プとして持って片手で自由に操作できる。電極針は、そ
の両側から２本の電極針保護バーで保護されているため
安全である。吸着採取シートは絶縁材で作られしかも帯
電電極バーとは分離しているため、本体において帯電電
極バーに対する電源を切っても、吸着採取シートに影響
を与えることはなく、吸着採取シートは帯電状態を維持
する。 携帯や保管に当たっては、帯電電極バーを高圧ケーブ
ルから分離し、吸着採取シートを巻いた状態とすること
ができる。Apply an adsorption sampling sheet to the surface where the presence of fine particles is expected,
When the charging electrode bar is moved while applying a high voltage so that it scans on it in a contactless manner, the adsorption and collection sheet is charged by the ions generated by the discharge by the many electrode needles of the charging electrode bar, and the static electricity causes fine particles to collect on it. Will be adsorbed. in this case,
The charging electrode bar can be freely operated with one hand by holding the tip connector of the high voltage cable as a grip. The electrode needle is safe because it is protected by two electrode needle protection bars from both sides. Since the adsorption sampling sheet is made of an insulating material and is separated from the charging electrode bar, even if the power to the charging electrode bar is turned off in the main body, it does not affect the adsorption sampling sheet, and the adsorption sampling sheet is in a charged state. To maintain. For carrying and storage, the charging electrode bar can be separated from the high-voltage cable and the adsorption collection sheet can be wound.
以下、本発明の一実施例を図面に基づき詳細に説明す
る。 第１図に示すように、この微物吸着採取装置は、本体
１と帯電電極バー２とこれらを接続する高圧ケーブル３
と吸着採取シート４とからなり、さらに帯電電極バー２
を収納するための電極収納筒５と接地コード６と直流12
V用電源コード７を備えている。 本体１は、乾電池及びその電圧を昇圧する変圧器を含
む高圧電源装置等をケース８に内蔵し、該ケース８の前
面に高圧ケーブル３を接続する高圧出力接続端子９、接
地コード６を接続する接地接続端子10、直流12V用電源
コード７を接続する直流12V用接続端子11、電源スイッ
チ12及び電源表示ランプ13を設けている。 帯電電極バー２は、第２図及び第３図に示すように、
合成樹脂製の絶縁バー14中にケーブル心線15を埋設する
とともに、該絶縁バー14の下面に、その軸線方向に所定
の間隔をおいて多数の電極針16を植設し、これら電極針
16をケーブル心線15と容量結合または抵抗結合してい
る。さらに、電極針16をその配列の両側から保護するた
め、及び安全のために、合成樹脂製の２本の電極針保護
バー17を、絶縁バー14の外側に嵌着した逆Ｕ字状の保持
片18により平行に架設している。この帯電電極バー２の
円筒形基端部であるコネクタ部2aの外周には雄ネジ19が
刻設されている。 高圧ケーブル３は、その基端に、本体１の高圧出力接続
端子７に着脱自在に接続する基端コネクタ20を固着し、
また先端に合成樹脂製で円筒状の先端コネクタ21を固着
している。この先端コネクタ21は帯電電極バー２のため
のグリップを兼ねるため、外周に複数の鍔22を一体に設
けている。図示していないが該先端コネクタ21と帯電電
極バー２のコネクタ部2aのうちの一方の内部にはプラ
グ、他方の内部にはジャックが設けられ、また先端コネ
クタ21の内周面には雌ネジが設けられている。この雌ネ
ジを帯電電極バー２のコネクタ部2aの雄ネジ19に螺合し
て、先端コネクタ21内にコネクタ2aを嵌合すると、プラ
グとジャックが接続され、また先端コネクタ21が帯電電
極バー２のグリップとなる。 電極収納筒５は帯電電極バー２を収納できる長さの有
底円筒形で、着脱自在な蓋23を備えている。帯電電極バ
ー２はこの電極収納筒５に収納して携行及び保管する。 吸着採取シート４は、可撓性に富むかつ表面に光沢の
ある軟質合成樹脂製で、電極収納筒５内に収納またはそ
の外周に巻き付けて携行できる。吸着採取シート４は、
採取しようとする微物に応じて色や厚さや材質などが異
なるものを数種類用意する。 この微物吸着採取装置を使用するには、吸着採取シー
ト４を微物の存在が予想される面（例えば床面）に当
て、接地コード６を接地し電源スイッチ12をオンにして
電極針16に直流高電圧（例えば約−15kV）を印加し、帯
電電極バー２のグリップ、つまり先端コネクタ21を片手
で把持して帯電電極バー２を吸着採取シート４よりやや
離した状態でコロナ放電を生じさせながらその面に沿っ
て動かす。すなわち、吸着採取シート４上を帯電電極バ
ー２により無接触の状態でコロナ放電で走査すれば、多
数の電極針16の放電により生じたイオンによって吸着採
取シート４が帯電し、この吸着採取シート４に静電気に
より微物が吸着される。その微物が例えば床面上の足跡
によるものであれば、床面上では肉眼で判別できなかっ
た足跡が吸着採取シート４に吸着されることにより、足
跡だけ恰も転写したように鮮明な像を形作る。An embodiment of the present invention will be described in detail below with reference to the drawings. As shown in FIG. 1, the device for collecting and collecting fine particles comprises a main body 1, a charging electrode bar 2, and a high-voltage cable 3 connecting them.
And an adsorption / collection sheet 4, and a charging electrode bar 2
Electrode storage cylinder 5, ground cord 6 and DC 12 for storing
It has a V power cord 7. The main body 1 has a case 8 containing a high-voltage power supply device including a dry battery and a transformer for increasing the voltage thereof, and a high-voltage output connection terminal 9 for connecting the high-voltage cable 3 and a ground cord 6 are connected to the front surface of the case 8. A ground connection terminal 10, a DC 12V connection terminal 11 for connecting the DC 12V power cord 7, a power switch 12, and a power indicator lamp 13 are provided. The charging electrode bar 2 is, as shown in FIGS. 2 and 3,
A cable core 15 is embedded in an insulating bar 14 made of synthetic resin, and a large number of electrode needles 16 are implanted on the lower surface of the insulating bar 14 at predetermined intervals in the axial direction thereof.
16 is capacitively or resistively coupled to the cable core 15. Further, in order to protect the electrode needles 16 from both sides of the arrangement and for safety, two electrode needle protection bars 17 made of synthetic resin are fitted to the outside of the insulating bar 14 to hold them in an inverted U shape. The pieces 18 are installed in parallel. A male screw 19 is engraved on the outer periphery of the connector portion 2a which is the cylindrical base end portion of the charging electrode bar 2. The high-voltage cable 3 has a base end connector 20 that is detachably connected to the high-voltage output connection terminal 7 of the main body 1 at its base end,
A cylindrical tip connector 21 made of synthetic resin is fixed to the tip. Since the tip connector 21 also serves as a grip for the charging electrode bar 2, a plurality of collars 22 are integrally provided on the outer circumference. Although not shown, a plug is provided inside one of the tip connector 21 and the connector portion 2a of the charging electrode bar 2, a jack is provided inside the other, and a female screw is provided on the inner peripheral surface of the tip connector 21. Is provided. When this female screw is screwed into the male screw 19 of the connector portion 2a of the charging electrode bar 2 and the connector 2a is fitted in the tip connector 21, the plug and the jack are connected, and the tip connector 21 is connected to the charging electrode bar 2 It will be a grip. The electrode storage cylinder 5 has a bottomed cylindrical shape having a length capable of storing the charging electrode bar 2, and includes a detachable lid 23. The charging electrode bar 2 is housed in the electrode housing cylinder 5 for carrying and storage. The adsorption / collection sheet 4 is made of a soft synthetic resin that is highly flexible and has a glossy surface, and can be stored in the electrode storage cylinder 5 or wrapped around the outer periphery thereof and carried. The adsorption collection sheet 4 is
Prepare several types of things that differ in color, thickness, material, etc., depending on the small objects to be collected. In order to use this fine substance adsorption / collection device, the adsorption / collection sheet 4 is brought into contact with a surface (for example, a floor surface) where the presence of fine matter is expected, the ground cord 6 is grounded, the power switch 12 is turned on, and the electrode needle 16 A high DC voltage (for example, about -15 kV) is applied to the grip of the charging electrode bar 2, that is, the tip connector 21 is held with one hand and the charging electrode bar 2 is slightly separated from the adsorption / collection sheet 4 to generate corona discharge. Move along the surface while doing. That is, when the adsorption / collection sheet 4 is scanned by corona discharge with the charging electrode bar 2 in a non-contact state, the adsorption / collection sheet 4 is charged by the ions generated by the discharge of the many electrode needles 16, and the adsorption / collection sheet 4 is charged. Fine particles are adsorbed by the static electricity. If the minute object is, for example, a footprint on the floor, the footprint that could not be discerned with the naked eye on the floor is adsorbed by the adsorption collection sheet 4, resulting in a clear image as if only the footprint was transferred. form.
本発明によれば次のような効果がある。 吸着採取シートは絶縁材で作られしかも帯電電極バ
ーとは完全に分離しており、この吸着採取シートを微物
の存在が予想される面に当て、その上を無接触で走査す
るように高電圧をかけながら帯電電極バーを動かすと、
帯電電極バーの多数の電極針による放電で生じたイオン
によって吸着採取シートが帯電し、これに静電気によっ
て微物が吸着する構造であるため、本体において帯電電
極バーに対する電源を切っても、吸着採取シートに影響
を与えることはなく、吸着採取シートは帯電状態を維持
するので、微物を的確に吸着できる。 高圧電源装置等を内蔵した本体に対して、片手で操
作できる帯電電極バーと、吸着採取シートとが分離した
構造であり、しかも吸着採取シートは、可撓性があって
巻いておくことができるため、携帯及び保管に便利であ
る。 帯電電極バーは、高圧ケーブルの先端コネクタをグ
リップとして持って片手で自由に操作でき、また吸着採
取シートも、本体及び帯電電極バーとは別に微物採取し
ようとする任意の面に自由に設置できるので、操作性が
非常に良い。 高圧ケーブルの先端コネクタが帯電電極バーのグリ
ップを兼ねているので、帯電電極バー自体の操作性及び
帯電電極バーと高圧ケーブルとの接続・分離の作業性が
良い。 電極針は、その両側から２本の電極針保護バーで保
護されているため安全である。 吸着採取シートは可撓性を有するため、微物を採取
しようとする面に凹凸があっても、微物を吸着できる。The present invention has the following effects. The adsorption / collection sheet is made of an insulating material and is completely separated from the charging electrode bar. If you move the charging electrode bar while applying voltage,
The adsorption and collection sheet is charged by the ions generated by the discharge of many electrode needles of the charging electrode bar, and the small particles are adsorbed by the static electricity, so even if the power to the charging electrode bar is turned off in the main body, the adsorption and sampling is performed. Since the adsorption / collection sheet maintains the charged state without affecting the sheet, it is possible to precisely adsorb the fine matter. The charging electrode bar, which can be operated with one hand, and the suction and collection sheet are separated from the main body containing the high-voltage power supply device, and the suction and collection sheet is flexible and can be wound. Therefore, it is convenient to carry and store. The charging electrode bar can be freely operated with one hand by holding the tip connector of the high-voltage cable as a grip, and the adsorption sampling sheet can be freely set on any surface to be used for collecting fine particles separately from the main body and the charging electrode bar. Therefore, the operability is very good. Since the tip connector of the high voltage cable also serves as a grip for the charging electrode bar, the operability of the charging electrode bar itself and the workability of connecting / disconnecting the charging electrode bar and the high voltage cable are good. The electrode needle is safe because it is protected by two electrode needle protection bars from both sides. Since the adsorption / collection sheet has flexibility, even if the surface from which the fine material is to be collected has irregularities, the fine material can be adsorbed.
第１図は本発明による微物吸着採取装置全体の斜視図、
第２図はその帯電電極バーの側面図、第３図は第２図の
Ｉ−Ｉ線断面図である。 １……本体、２……帯電電極バー、2a……コネクタ部、
３……高圧ケーブル、４……吸着採取シート、14……絶
縁バー、15……心線、16……電極針、17……電極針保護
バー、21……先端コネクタ。FIG. 1 is a perspective view of the whole fine matter adsorption / collection device according to the present invention,
FIG. 2 is a side view of the charging electrode bar, and FIG. 3 is a sectional view taken along line II of FIG. 1 ... Main body, 2 ... Charging electrode bar, 2a ... Connector section,
3 ... High-voltage cable, 4 ... Adsorption sampling sheet, 14 ... Insulation bar, 15 ... Core wire, 16 ... Electrode needle, 17 ... Electrode needle protection bar, 21 ... Tip connector.
Claims (1)
の間隔をおいて多数の電極針16を配列植設し、これら電
極針16を絶縁バー14に埋設された心線15と電気的に結合
させ、またこれら電極針16をその配列の両側から保護す
るため、合成樹脂製の２本の電極針保護バー17を絶縁バ
ー14に平行に架設し、絶縁バー14の基端部をコネクタ部
2aとした、片手で操作できる帯電電極バー２と、 前記本体１から延長され、帯電電極バー２のコネクタ部
2aと着脱自在に接合して前記心線15と電気接続するた
め、帯電電極バー２のグリップを兼ねる先端コネクタ21
を先端に設けた高圧ケーブル３と、 前記帯電電極バー２を対向させながら移動させることに
より、その多数の電極針16の放電によって生じるイオン
により帯電される可撓性の絶縁材製吸着採取シート４
と、 からなることを特徴とする微物吸着採取装置。1. A main body 1 containing a high-voltage power supply device and the like, and a large number of electrode needles 16 are arranged and planted on the lower surface of an insulating bar 14 made of synthetic resin at predetermined intervals in the axial direction thereof. In order to electrically connect the needle 16 with the core wire 15 embedded in the insulating bar 14 and to protect these electrode needles 16 from both sides of the array, two electrode needle protection bars 17 made of synthetic resin are used as insulating bars. It is installed parallel to 14 and the base end of the insulating bar 14 is
2a, a charging electrode bar 2 that can be operated with one hand, and a connector portion of the charging electrode bar 2 that extends from the main body 1
The tip connector 21 also serves as a grip for the charging electrode bar 2 because it is detachably joined to 2a and is electrically connected to the core wire 15.
The high-voltage cable 3 provided at the tip and the charging electrode bar 2 are moved while being opposed to each other, so that a flexible insulating adsorption and collection sheet 4 is charged by ions generated by the discharge of a large number of the electrode needles 16.
And a fine matter adsorption / collection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2122919A JPH087114B2 (en) | 1990-05-15 | 1990-05-15 | Fine substance adsorption sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2122919A JPH087114B2 (en) | 1990-05-15 | 1990-05-15 | Fine substance adsorption sampling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0419539A JPH0419539A (en) | 1992-01-23 |
| JPH087114B2 true JPH087114B2 (en) | 1996-01-29 |
Family
ID=14847848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2122919A Expired - Fee Related JPH087114B2 (en) | 1990-05-15 | 1990-05-15 | Fine substance adsorption sampling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH087114B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014230413A (en) * | 2013-05-23 | 2014-12-08 | 春日電機株式会社 | Fine object collection device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0894501A (en) * | 1994-09-21 | 1996-04-12 | Shunichi Muto | Electostatic minute object collector |
| DE19517086A1 (en) * | 1995-05-15 | 1996-11-21 | Winfried Labuda | Device for the surface removal of cutouts of the material particle coating on surfaces with the aim of a subsequent particle analysis |
| JP4736215B2 (en) * | 2001-03-27 | 2011-07-27 | 東レ株式会社 | Discharger performance measuring device |
| GB2431002A (en) * | 2005-09-08 | 2007-04-11 | Forensic Pathways Ltd | Evidence collection apparatus |
| JP4773474B2 (en) * | 2008-03-27 | 2011-09-14 | 春日電機株式会社 | Fine adsorption device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH054720Y2 (en) * | 1987-06-10 | 1993-02-05 | ||
| JPH01132952U (en) * | 1988-02-29 | 1989-09-11 | ||
| JPH01137452U (en) * | 1988-03-16 | 1989-09-20 |
-
1990
- 1990-05-15 JP JP2122919A patent/JPH087114B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014230413A (en) * | 2013-05-23 | 2014-12-08 | 春日電機株式会社 | Fine object collection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0419539A (en) | 1992-01-23 |
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