JP4773474B2 - Fine adsorption device - Google Patents

Description

  The present invention relates to a fine object adsorption sampling device that adsorbs and collects fine objects such as fiber pieces, hair, earth and sand by static electricity.

  The present applicant provides a fine substance adsorption sampling apparatus as described in Patent Document 1 (Japanese Patent Publication No. 8-7114). This fine object adsorption / collection device comprises a main body incorporating a high-voltage power supply and the like, a charging electrode bar connected to this with a cable, and a flexible fine substance adsorption sheet (adsorption / collection sheet). In order to use this, the fine substance adsorbing sheet is charged so that the fine substance adsorbing sheet is scanned while being subjected to corona discharge from the charging electrode bar, and the fine substance adsorbing sheet is adsorbed by static electricity.

  As an improvement of this, by making a battery as a power source, a high voltage generating circuit for generating a high voltage, and a discharge electrode to which the high voltage is applied, into a charging probe built in the cylindrical main body case, Products that improve portability and operability and can be switched between a charging mode and a static elimination mode have been commercialized and are widely used for collecting fines in criminal investigations.

In such a fine material adsorption sampling device, since it generates high voltage, it is necessary to ground (ground), but depending on the place of use (site) there is no place to ground (ground connection), Even if it is connected to a device with a large electrostatic capacity, it cannot be grounded sufficiently, and the collection of fine objects becomes insufficient, the human body is charged and receives electric shock, and there are also problems in terms of safety.
Japanese Patent Publication No. 8-7114

A first object of the present invention is to provide a fine material adsorption sampling device that can be in a simple pseudo grounding state even in a place (site) where there is no place to be grounded.
The second problem is to simplify the structure of the discharge electrode built in the charging probe to reduce the cost.
The third problem is to improve the convenience of handling the ground wire.

  In order to achieve the first object, the invention according to claim 1 has a battery as a power source, a high voltage generating circuit for generating a high voltage, and a discharge electrode to which the high voltage is applied incorporated in a cylindrical body case. In a fine object adsorption sampling apparatus comprising: a charged probe, and a flexible fine substance adsorbing sheet that adsorbs fine substances by static electricity by moving the charged probe and charging with ions generated by discharge of the discharge electrode. In order to ground the high voltage generation circuit, a ground wire connected to the charging probe and a flexible conductive sheet connected to the tip of the ground wire are provided.

In order to achieve the second problem described above, the discharge electrode in the charging probe further forms a plurality of cut-and-raised portions at equal intervals on the metal electrode holding plate, and discharges to the cut-and-raised portions. A plurality of discharge needles are held on the electrode holding plate at equal intervals by press-fitting the needles.
In addition, the present invention provides such a discharge electrode with a first discharge port formed in the body portion of the cylindrical main body case and a second discharge electrode formed at the tip of the cylindrical main body case with a shorter length. Are installed in the cylindrical main body case so as to face each of the discharge ports.

In the invention according to claim 2 , in order to achieve the third object, the ground wire is provided with a reel for winding the ground wire, and a plug connected to the jack of the charging probe is provided at the base end of the ground wire. In addition, a conductive clip that sandwiches the conductive sheet is provided at the tip of the ground wire.

  According to the first aspect of the present invention, by connecting the tip of the ground wire to the flexible conductive sheet, it is possible to release the electric charge from the conductive sheet so as to be in a pseudo ground state. Even on site, the same effect as grounding can be obtained. Since the conductive sheet has flexibility, it can be rolled up and stored, and can be developed according to the installation surface when used, and is easy to handle.

According to the present invention, since the discharge electrode of the charging probe is formed by pressing and holding the discharge needles in a large number of cut and raised portions formed on the metal electrode holding plate, the manufacturing cost of the discharge electrode can be reduced.

According to the present invention, the discharge electrode as described above is provided with the first discharge port formed in the body portion of the cylindrical main body case and the second discharge electrode formed at the tip of the cylindrical main body case with a shorter length. Since the discharge probe is arranged opposite to each of the discharge ports, the charging probe can be moved sideways with respect to the fine object adsorption sheet to be used in a horizontal direction in which charging (or charge removal) can be performed in a wide range, and the charging probe can be moved vertically. It can be used in two different ways: in the vertical orientation, where a narrow range can be locally charged (or neutralized).

According to the second aspect of the present invention, the ground wire can be wound around a reel to have an arbitrary length, and the ground wire can be easily connected to and disconnected from the charged probe by the plug at the base end of the ground wire. The conductive clip at the end of the wire can be easily connected and separated from the conductive sheet.

  Next, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the fine object adsorption sampling apparatus according to the present invention comprises a charging probe A, a flexible fine object adsorption sheet B, a ground wire C, and a flexible conductive sheet (conductive mat) D. I have.

  As shown in FIG. 2, the charging probe A has a base end portion in a cylindrical main body case 1 that can be operated with one hand, a battery storage portion 3 that can store a battery 2 as a power source, and a tip beyond this point. Is configured as a circuit storage unit 4, and the opening of the battery storage unit 3 is closed by a detachable tail end cover 1 a.

  A circuit board 5 on which a high voltage generating circuit for generating plus and minus high voltages is mounted is installed in the circuit housing portion 4. The high voltage generation circuit protrudes from the body part of the main body case 1 with a charging mode that generates only a high voltage of either plus or minus polarity and a static elimination mode that simultaneously generates a high voltage of both plus or minus polarity. The charging / discharging mode changeover switch 6 can be switched. When the charging mode is set, the charging display light emitting diode 6a is turned on. When the charging mode is set, the discharging display light emitting diode 6b is turned on. The high voltage generation circuit can turn on / off the power from the battery 2 by a power switch 7 protruding from the body of the main body case 1.

  A first discharge electrode 8 along the plane and a second discharge electrode 9 perpendicular to the plane are attached to the tip of the circuit board 5, and these discharge electrodes 8, 9 are high on the circuit board 5. Electrically connected to the voltage generation circuit.

  As shown in FIGS. 3 and 4, the first discharge electrode 8 is opposed to the first discharge port 10 provided in the vicinity of the front end of the body portion of the main body case 1, while the second discharge electrode 8 The discharge electrode 9 is opposed to the second discharge port 11 provided at the tip of the main body case 1. The first discharge port 10 is long in the axial direction of the main body case 1, but the second discharge port 11 is long in the direction orthogonal to the axial direction and is shorter than the first discharge port 10.

  Each of the first and second discharge electrodes 8 and 9 is formed by projecting a plurality of discharge needles 13 at regular intervals on an electrode holding plate 12 which is a long metal plate. The first discharge electrode 8 has more discharge needles 13 than the second discharge electrode 9 in accordance with the difference in length between the discharge ports 10 and 11. The discharge needles 13 of the first discharge electrode 8 are arranged along the center line of the first discharge port 10, whereas the discharge needles 13 of the second discharge electrode 9 are arranged in the second discharge port 11. However, both of the holding structures of the discharge needles 13 with respect to the electrode holding plate 12 are the same, and the following holding structure is provided.

  Although only one discharge needle 13 is shown in FIGS. 5 (A), (B), and (C), the electrode holding plate 12 that is a long metal plate is cut parallel to a portion thereof, A plurality of cut-and-raised portions 12a are formed at equal intervals on one side by cutting and raising in a U shape on one side, and a plurality of discharge needles 13 are press-fitted into each cut-and-raised portion 12a one by one. The discharge needles 13 are held on the electrode holding plate 12 at equal intervals.

  On the other hand, on the tail end side of the main body case 1, as shown in FIG. 2, a grounding metal rod 14 connected to the ground terminal of the high voltage generating circuit passes through the battery housing 3, The grounding jack 15 is detachably held outside the tail end cover 1a.

  The ground wire C shown in FIG. 1 includes a reel 16 for winding the ground wire C. The reel 16 has a plug 17 provided at the proximal end of the ground wire C and both sides of the conductive clip 18 provided at the distal end. In addition, the required length can be pulled out freely. The plug 17 can be detachably connected to the jack 15 of the charging probe A, and the conductive clip 18 can sandwich the conductive sheet D in a detachable manner. Since the conductive clip 18 is picked and opened and closed, it is covered with an elastic insulating cover 19 such as rubber for safety.

The fine material adsorption sheet B is a resin film that is easily charged with static electricity.
The conductive sheet D is made by impregnating or laminating a conductive material on a base material such as a resin such as vinyl chloride or rubber to give conductivity to the entire surface, and has a flexible flexibility that can be wound up. is doing.

  When trying to collect a fine object with the fine object adsorption sampling apparatus of the present embodiment, the fine object adsorption sheet B is placed on the surface on which the fine object is to be extracted, and the conductive sheet D is arranged as a fine object. The conductive sheet D is sandwiched between the conductive clips 18 of the ground wire 19 connected to the charging probe A and placed in a state of being separated from the suction sheet B. As a result, the high voltage generating circuit in the charging probe A is put into a pseudo ground state by the conductive sheet D.

  The charging probe A is set to the charging mode, and the first discharge port 10 or the second discharge port 11 is made fine while a high voltage having one of the positive and negative polarities is applied to the first and second discharge electrodes 8 and 9. The charging probe A is moved in a non-contact state toward the suction sheet B and moved along the fine object suction sheet B to be charged. Fine matter is adsorbed to the fine matter adsorbing sheet B by static electricity.

  In order to remove the fine matter adsorbed on the fine matter adsorbing sheet B, the charging probe A is set in the static elimination mode and a high voltage having both positive and negative polarities is applied to the first and second discharge electrodes 8 and 9. Then, the same operation as described above is performed to neutralize the fine substance adsorbing sheet B with both plus and minus ions.

  The conductive sheet D may be a wire mesh sheet.

It is a whole perspective view of the fine substance adsorption | suction collection device of a present Example. It is the whole charging probe sectional drawing in it. FIG. It is a perspective view which shows the inside of the front-end | tip part. It is a partial view of a discharge electrode, (A) is an exploded perspective view, (B) is a front view, (C) is a perspective view.

Explanation of symbols

A Charge probe B Fine object adsorption sheet C Ground wire D Conductive sheet 1 Main body case 1a Tail end cover 2 Battery 3 Battery storage unit 4 Circuit storage unit 5 Circuit board 6 Charging / static discharge mode changeover switch 6a Charging display light emitting diode 6b Static neutralization Light emitting diode for display 7 Power switch 8 First discharge electrode 9 Second discharge electrode 10 First discharge port 11 Second discharge port 12 Electrode holding plate 12a Cut and raised portion 13 Discharge needle 14 Ground metal rod 15 For ground Jack 16 Reel 17 Plug 18 Conductive clip 19 Elastic insulation cover

Claims (2)

A battery as a power source, a high voltage generating circuit for generating a high voltage, a charging probe in which a discharge electrode to which the high voltage is applied is built in a cylindrical main body case, and moving the charging probe to discharge the discharge electrode In a fine object adsorption sampling apparatus equipped with a flexible fine substance adsorption sheet that adsorbs fine substances by static electricity by charging with generated ions
A ground wire having a base end connected to a charging probe for grounding the high voltage generation circuit;
A flexible conductive sheet connected to the tip of the ground wire ;
In the discharge electrode, a plurality of cut and raised portions are formed at equal intervals on a metal electrode holding plate, and the discharge needles are press-fitted into each cut and raised portion, whereby the plurality of discharge needles are equally spaced on the electrode holding plate. Each of the first discharge port formed in the body portion of the cylindrical main body case and the second discharge port formed in the tip of the cylindrical main body case with a shorter length than the first discharge port. It is installed in the cylindrical main body case so as to oppose to the fine substance adsorption sampling device. The ground wire is provided with a reel for winding it, and a plug for connecting to the jack of the charging probe is provided at the base end of the ground wire, and a conductive clip sandwiching a conductive sheet is provided at the tip of the ground wire. The fine substance adsorption sampling apparatus according to claim 1, wherein the apparatus is provided.

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