Method for grounding front panel of glove box

Abstract

To provide a method for grounding a front panel of a glove box to prevent occurrence of static electricity on a front transparent panel of the glove box.SOLUTION: A method for grounding a front panel of a glove box 1 that includes: a box portion 4 defining a working space 2 and having a front opening portion 3; a front transparent panel 5 arranged so as to close the front opening portion 3 of the box portion 4; and a steel stand 6 for holding the box portion 4, includes: applying a transparent conductive coating 8 to the entire surface of the front transparent panel 5; forming an O-ring groove 9 in a portion of the front transparent panel 5 that is in contact with a peripheral edge of the front opening portion 3; and electrically connecting the transparent conductive coating 8 to the steel stand 6 by a steel pressing frame 11 for fixing the front transparent panel 5 to the front opening portion 3 of the box portion 4 via an O-ring 10 to be fitted in the O-ring groove 9.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a method for grounding a front panel of a glove box.

Background Art

[0002] Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-174659) has a workroom and a loading / unloading room, and first and second heaters are routed along the bottom, ceiling, and side surfaces of the workroom and the loading / unloading room. By energizing, the wall surface without the workroom is heated to evaporate the moisture adhering to the inner peripheral surface, and a glove box device is disclosed. In the glove box device disclosed in Cited Document 1, it is also disclosed that a transparent plate is attached to the workroom in an airtight manner.

[0003] In the glove box disclosed in Patent Document 2 (Japanese Patent Application Laid-Open No. 2005-300277), a transparent plate as an observation part through which the inside can be observed from the outside is fitted on the front side thereof. This transparent plate is made of a thick plate of acrylic resin so as to exhibit light transmissibility and gas barrier properties.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] For example, in a conventional glove box as described in the above-mentioned patent document, the working space inside the box is basically moisture-free, so it becomes an environment where electric charges do not escape. In this environment of the working space, static electricity is charged on the front transparent panel such as polycarbonate attached to the front of the working space, and particles such as sandblasting, all-solid-state battery powder, and various solvents adhere to the front panel, resulting in the problem that the transparency of the front transparent panel decreases.

[0006] Therefore, the present invention provides a method for grounding the front panel of a glove box to prevent static electricity from being generated on the front transparent panel of the glove box.

Means for Solving the Problems

[0007] Therefore, the method for grounding the front panel of the glove box of the present invention is as follows: in a glove box comprising a box part that defines a working space and has a front opening, a front transparent panel arranged to close the front opening of the box part, and a steel gantry that holds the box part, applying a transparent conductive film to the entire surface of the front transparent panel, forming an O-ring groove at a portion of the front transparent panel that contacts the periphery of the front opening, and electrically connecting the transparent conductive film and the steel gantry by means of a steel pressing frame for fixing the front transparent panel to the front opening of the box part via an O-ring mounted in the O-ring groove.

[0008] The transparent conductive film applied to the front transparent panel is preferably formed by applying a solution containing AgNW (silver nanowire), PEDOT (polyethylenedioxythiophene), CNT (carbon nanofiber), etc. In addition, the front transparent panel is preferably a polycarbonate plate with a predetermined thickness (for example, 10 mm).

[0009] As a result, particles such as sandblasting, all-solid-state battery powder, and various solvents staying in the working space of the glove box become charged and adhere to the front transparent panel. Although they adhere to the transparent conductive film coated on the front transparent panel, since the transparent conductive film is grounded to the steel pedestal via the steel presser frame, the charged particles can escape to the ground side, preventing the particles from adhering.

Advantages of the Invention

[0010] According to the grounding method of the present invention, a transparent conductive film is provided on the entire surface of the front transparent panel, and this transparent conductive film is electrically connected to the steel pedestal via the steel presser frame. Therefore, the charge of the charged particles adhering to the transparent conductive film of the front transparent panel can escape to the steel pedestal side, preventing the particles from adhering to the front transparent panel, and thus maintaining the transparency of the front transparent panel. In particular, in an environment with a dew point of 1 ppm (-76 degrees) and an oxygen concentration of 1 ppm, the anti-static effect was confirmed by grounding the transparent conductive film. Also, it was confirmed that the transparency is maintained by the film of the present invention even for organic solvents such as acetone that dissolve the transparent panel.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Examples

[0013] The glove box 1 shown in FIG. 1 includes a box portion 4 that defines a working space 2 and has a front opening 3, a front transparent panel 5 arranged to close the front opening 3 of the box portion 4, and a steel gantry 6 that holds the box portion 4. Further, the front transparent panel 5 has a mounting opening 20 for mounting a glove (not shown) for work. Furthermore, an access portion 7 for taking in and out the work piece with respect to the working space 2 is provided. Also, it is desirable that the steel gantry 6 is grounded via a ground wire 30. Further, the front transparent panel 5 is formed of 10 mm polycarbonate.

[0014] As the environment inside the glove box 1, for example, the oxygen concentration is 1 ppm and the dew point is -76 degrees. As the work in the glove box 1, all-solid-state battery powder and various solvents are used. Also, as another work, there is sandblasting work etc.

[0015] On the front transparent panel 5, for example, as shown in FIG. 2, a transparent conductive film 8 applied to the entire surface of the front transparent panel 5 and an O-ring groove 9 formed on the peripheral edge of the inner peripheral surface of the front transparent panel 3 are formed. The inner surface of the front transparent panel 5 is fixed to the steel gantry 6 via an O-ring 10 mounted in the O-ring groove 9 by a steel presser frame 11. Thereby, the space between the transparent conductive film 8 of the front transparent panel 5 and the steel gantry 6 is electrically connected via the steel presser frame 11, and grounding of the transparent conductive film 8 is achieved.

[0016] Grounding of the front transparent panel 5 is performed, for example, according to the flowchart shown in FIG. 3.

[0017] Grounding of the front transparent panel 5 starting from step 100, in step 110, a 10 mm polycarbonate plate is processed to the outer dimensions of the front transparent panel 5, and in step 120, the front transparent panel 5 is suspended.

[0018] In step 130, a solution for forming a transparent conductive film is applied to the entire surface (front and back) of the front transparent panel 5. This solution is a solution containing, for example, AgNW (silver nanowire), PEDOT (polyethylenedioxythiophene), CNT (carbon nanofiber), etc.

[0019] In step 140, the entire surface transparent panel 5 coated with the solution is dried to form a transparent conductive film 8 on the front and back surfaces. Then, in step 150, the resistance value of the transparent conductive film 8 is measured. It is confirmed that the surface resistance value after coating is a predetermined value (10 7 Ω), and if the predetermined value is not reached, the operation is performed again so as to apply it again.

[0020] Furthermore, in step 160, an O-ring groove 9 is machined and formed in a portion in contact with the periphery near the front opening 3 on the back surface of the front transparent panel 5. Further, in step 170, a solution for forming a transparent conductive film 8 is applied to the entire circumference of the O-ring groove 9, dried in step 180 to form a transparent conductive film 8 on the entire surface of the front edge transparent panel 5, and in step 190, the resistance value of the transparent conductive film 8 is a predetermined value (10 7 Ω), and the operation is completed in step 200.

[0021] As a result, since the surface (transparent conductive film) of the front transparent panel 5 is grounded via the steel presser frame 11 and the steel pedestal 6, the front transparent panel 5 is not charged by static electricity, so that the transparency of the front transparent panel 5 can be maintained.

Explanation of reference numerals

[0022] 1 glove box 2 working space 3 front opening 4 box part 5 front transparent panel 6 steel pedestal 7 access part 8 transparent conductive film 9 O-ring groove 10 O-rings 11 Steel pressing frame 20 Mounting port 30 Ground wire

Claims

【Claim 1】 In a glove box comprising a box portion that defines a working space and has a front opening, a front transparent panel disposed to close the front opening of the box portion, and a steel gantry that holds the box portion, applying a transparent conductive film over the entire surface of the front transparent panel, forming an O-ring groove in a portion of the front transparent panel that contacts the periphery of the front opening, and electrically connecting the transparent conductive film and the steel gantry via a steel pressing frame for fixing the front transparent panel to the front opening of the box portion. A method for grounding the front panel of a glove box, characterized by the above.

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