JPH0743665Y2 - Electrostatic position detector for electrostatic powder gun - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic potential detecting device for an electrostatic powder gun. More specifically, the powder from a spray gun for spraying powder in electrostatic powder coating has a predetermined electrostatic voltage. The present invention relates to a simple electrostatic potential detecting device that detects whether or not it is charged.

[0002]

2. Description of the Related Art Conventionally, in electrostatic powder coating, detection of a failure of a gun used for spraying powder, whether the powder sprayed by the gun is charged to a predetermined electrostatic voltage, or the like is detected.
If a low voltmeter on the primary side is attached to the electrostatic powder gun and the needle of the voltmeter swings, it is assumed that high voltage is generated on the secondary side and the powder is charged. If the powder does not adhere to the object to be coated and it falls on the floor surface etc.,
I had determined that the electrostatic powder gun was out of order.

[0003]

[Problems to be solved by the invention] However, even if the high voltage is not generated on the secondary side even if the voltmeter on the primary side is running, or if the static voltage is generated on the secondary side, A certain high voltage (50 to 100 KV) may not be generated due to damage to the internal elements of the gun, etc. Also, after the powder does not adhere to the object to be coated and falls due to its own weight, the powder There was a problem that it was wasteful and uneconomical.

The present invention has been made in view of the above conventional problems, and its purpose is to simplify the structure and to easily and economically determine whether electrostatic powder is charged. It is to provide an electrostatic potential detection device for an electrostatic powder gun capable of detecting .

[0005]

Means for Solving the Problems To this end, the present invention is, on the outer peripheral surface of the non-conductive circular <br/> cylindrical rotary member 11, such as a plastic end faces are closed, at least three conductive metal foil 12 such as an aluminum foil is bonded respectively with a predetermined equal interval is configuration electrostatic potential detected rotational body 10, bearing the electrostatic potential detection rotary body 10 is a pair of the base 14 plate 1
Between 5 and 15, a central support for loose insertion in the central shaft holes 13 on both end faces.
It is characterized by a structure in which it is rotatably supported via a holding shaft 16 .

[0006]

EXAMPLES Examples will be described with reference to the drawings and their operation.
Explained. 1 is a schematic front view of the whole, FIG. 2 is a side view of the electrostatic potential detecting rotator, and FIGS. 3 and 4 are sectional views of the electrostatic potential detecting rotator. In these figures, the electrostatic potential detecting rotator 10 is
At least three conductive metal foils 12 such as aluminum foils are provided at predetermined equal intervals in the axial direction of the outer peripheral surface of the non-conductive cylindrical rotating body 11 made of plastic or the like with both end surfaces closed, preferably a conductive metal foil. ratio 2: 1 to the circumferential width length of 12 is constructed by bonding fixed a 3-to-one relationship, electrostatic potential detection rotary body 10 is a pair of support plate 15 on the base 14, 1
5 are rotatably supported by a central support shaft 16 loosely inserted in the central shaft holes 13 of both end surfaces thereof.

The electrostatic potential detecting device according to the present invention has the above-mentioned configuration.
Therefore, as shown in FIG. 1 and FIG.
Axial direction of the electric potential detection rotator 10 (axial direction of the central support shaft 16
Direction) and slightly above the center, and electrostatic
Electrostatic powder gun in a positional relationship close to the rotating body 10
When 20 is operated to spray the powder, the sprayed powder
Is charged (for example, to + potential), electrostatic potential detection
Spontaneously on the surface of the conductive metal foil 12 of the rotating body 10.
A potential opposite to the + potential (for example, -potential) is generated and charged
When the powder flows in the rotation direction of the electrostatic potential detection rotor 10,
Of the conductive metal foil 12 to the charged potential (+ potential) of the powder of
Position (-potential) follows (follows) the electrostatic potential detection rotation
A force to rotate the body 10 is generated to detect the electrostatic potential.
The rotating body 10 rotates in a fixed direction with its center support shaft 16 as a fulcrum . On the other hand, when the powder is not charged and the electrostatic powder gun 20 itself is out of order, no electric potential is generated on the surface of the conductive metal foil 12, so that the electrostatic potential detection rotator 10 is It does not rotate while still.

[0008 ]

However, according to the present invention, the structure is simple and the electrostatic potential of the powder sprayed from the electrostatic powder gun is detected by operating the electrostatic powder gun. since it is intended to be made by the presence or absence of rotation of the electric potential detected rotational body, and the charging or the like of the electrostatic powder easily, and it is capable of economically detection.

[Brief description of drawings]

FIG. 1 is a schematic front view of an example of an apparatus according to the present invention.

FIG. 2 is a side view of an electrostatic potential detecting rotator.

FIG. 3 is a front side sectional view of an electrostatic potential detection rotator.

FIG. 4 is a side sectional view of an electrostatic potential detecting rotator.

[Explanation of symbols]

10 Electrostatic Position Detection Rotating Body 11 Non-Conducting Cylindrical Rotating Body 12 Conductive Metal Foil 13 Center Shaft Hole 14 Base 15, 15 Pair of Bearing Plates 16 Center Support Shaft

Claims (1)

[Scope of utility model registration request] The outer peripheral surface of the 1. A non-conductive Cylindrical such as plastic which both end surfaces are closed like rotating body 11, at least three conductive metal foil 12 of aluminum foil or the like is given, respectively
Are bonded electrostatic potential detection rotary body 10 have equal spacing is formed, the electrostatic potential detection rotary body 10 is a central shaft hole 13 of the end faces between the pair of support plates 15, 15 on the base 14 An electrostatic potential detecting device for an electrostatic powder gun, which is rotatably supported by a loosely inserted center support shaft 16 .