JP2698917B2 - Dust removal method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for removing abrasive dust and other dust removed from the surface of a work such as an automobile body by air blow into a booth, and again on the work surface. The present invention relates to a dust removing method and an apparatus therefor that can surely prevent adhesion.

[Conventional technology]

In general, the coating of the body of an automobile is performed through the sequence of surface treatment of the base material, undercoating (electrodeposition coating), intermediate coating, and topcoating. Has done so-called “Kokuken” sanding using sandpaper to correct the defective parts. If the next painting is carried out with the polishing grounds attached to the repaired area and its surroundings by this empty laboratory, the appearance and quality of the painted surface will be impaired. Dust removal means is used to remove the residue from the membrane surface. Conventionally, a brush is brought into contact with the surface of the coating film to be dust-proofed, and the adhering dust is wiped off by rotating the brush, and a wiper device that sucks and discharges the dust into the suction duct is used. Scattering and removal were performed.

[Problems to be solved by the invention]

With the above-described conventional wiper, it is difficult to completely collect the grounds wiped and removed by the rotary brush with the suction duct, and the grounds that could not be suctioned might adhere to the vehicle body surface again. . In addition, in the case where the grinding dust is scattered by air blow, the scattering direction is not constant, and the grinding dust flying above the booth adheres to the vehicle body surface in the same manner as above, leading to a defective accident in the next painting process. Was causing it.

The present invention solves the above-mentioned disadvantages of the conventional dust removing means,
It is an object of the present invention to provide a dust removing method and a dust removing method capable of dispersing grinding dust and other dust adhering to the surface of a work from a front part to a rear part of the work in a direction opposite to a conveying direction thereof.

[Means for solving the problem]

As a specific means for achieving the above object, the present invention provides: 1) a work placed on a cart is transferred in a predetermined direction inside a dust removal booth, and a character in a plan view placed laterally above the work. Each of the above-described air blow devices is passed by passing an upper surface air blow device having an air supply pipe in a shape of a circle and a side air blow device having an air supply tube vertically installed on both sides of the work in a direction opposite to the direction of transporting the work. A plurality of air nozzles installed in the air supply pipe of the air jet blows air flow obliquely downward in the opposite direction to the work transfer direction, and dust adhering to the work surface is removed from the upper surface of the work. In the direction of transport of the work, it should run from the center of the upper surface of the work to both sides, and for the side of the work, it should run from above to below the side of the work with respect to the direction of transfer of the work. A dust removal method characterized in that the dust is scattered from the surface of the work, and 2) a work placed on a trolley and transferred in a predetermined direction inside the dust removal booth, and a center located above the work as compared to both sides of the upper surface of the work. An upper surface air blow device having an air supply pipe having a V-shape in a plan view, which is laterally provided so as to protrude, and an air supply pipe which is vertically provided on both sides of the work so as to be inclined upward in a direction opposite to the work transfer direction. A plurality of air nozzles for ejecting an air flow to the surface of the work in such a manner that each air supply pipe is directed obliquely downward in a direction perpendicular to the axis and in a direction opposite to the work transfer direction. It is intended to propose a dust removing device characterized by being provided.

[Action]

According to the present invention having the above-described configuration, the air flow ejected obliquely downward in a direction opposite to the work transfer direction,
Dust adhering to the surface of the work is scattered from the center portion of the work upper surface toward both sides, and is scattered from the upper side to the work side surface.

〔Example〕

Hereinafter, an embodiment in which a dust removing method and a dust removing device according to the present invention are used on a vehicle body will be described with reference to the drawings.

FIG. 1 is a vertical cross-sectional view of a device showing a state of removing grinding dust adhering to the surface of a vehicle body inside a dust removal booth,
FIG. 2 is a plan view of the dust removing chamber. Inside the dust removal booth 1, the vehicle body W that has gone through the empty grinding process is transported in the direction of the arrow, and the grinding dust adhering to the surface is removed by the upper surface dust removing device 20 disposed on the front side in the vehicle body transport direction and the front end similarly. It is removed by the side dust remover 40 arranged on the side. A dynamic pressure chamber 4 is provided between the upper wall 2 of the dust removal booth 1 and a punching metal 3 provided therebelow, and a static pressure chamber 6 is provided between the punching metal 3 and a filter 5 provided therebelow. Is formed between the filter 5 and the pit 7 below the booth.
Are formed. The air introduced into the dynamic pressure chamber 4 of the dust removal booth 1 from an air supply duct (not shown) flows down from the opening of the punching metal 3 to the static pressure chamber 6, and the air that has been purified by the filter 5 to have a uniform pressure is removed. It flows into the chamber 8 and is pulled out from the pit 7 side to form a circulating flow. At the lower part of the dust removing chamber 8, a mushroom-shaped base 9 is disposed, and a truck 10 on which the vehicle body W is placed is transferred through the dust removing chamber 8 by a driving chain conveyor (not shown) disposed below the base. You.

Top surface dust remover 20 disposed on the near side in the vehicle body W transport direction
Is configured as follows. With reference to FIGS. 1 to 4, the posts 21, 21 are symmetrically positioned with respect to the conveyor axis.
Is erected, and the support plate 22 is placed laterally between the two columns. Prop 21, 21
Inside the screw shaft 24 of the servo motor 23 and the guide rod
25 are installed vertically in parallel. The screw shaft 24 is screwed to an end of the support plate 22, and a guide rod 25 is inserted through the end of the support plate 22 in close proximity to the screw shaft 24. Therefore, the support plate 22 can be moved up and down between the two columns 21 by the rotation of the servo motor 23. Support plate
A frame 26 is fixed to the lower surface of the frame 22 in a horizontally long state, and a support plate 27 is hung from left and right ends thereof. This support plate 27,27
Then, the supporting members 28, 28 which are also vertically provided from the frame 26 support a semi-cylindrical vacuum device 29 which is bent in a rectangular shape in plan view and has an open lower surface 29a. On the edge side of the semi-cylindrical vacuum device 29 in the vehicle body transport direction, an upper surface air blow device 30 is provided. The upper surface air blow device 30 is provided inside the semi-cylindrical vacuum device 29, and has an L-shaped air supply pipe along its shape, that is, an air supply pipe bent so that its central portion protrudes from both sides of the upper surface of the vehicle body. The air supply pipe 31 includes a plurality of air nozzles 32 which are disposed in the air supply pipe 31, and which emit air flow obliquely downward in a direction perpendicular to the axial direction and in a direction opposite to the vehicle conveyance direction. Air supply pipe 31
Has an air supply duct 31a from an air supply duct (not shown).
Air is introduced through the plurality of air nozzles 32 on the front surface, and an air flow is jetted toward the surface of the vehicle body W to scatter the residue attached to the surface in a direction opposite to the vehicle body transport direction.

Next, the side dust remover 40 disposed on the front side in the transport direction of the vehicle body W is configured as follows. Referring to FIGS. 5 and 6 together with FIGS. 1 and 2, portal-shaped support frames 41, 41 are erected on the base 9 at positions symmetrical with respect to the conveyor axis. A semi-cylindrical vacuum device 43 having a front surface (a body W-facing surface) 43a opened through a pair of support frames 41, 41 disposed on both sides of the vehicle body W via support members 42, 42. The surfaces 43a are arranged to face each other. In this case, the semi-cylindrical vacuum devices 43, 43 are vertically installed so as to be inclined upward in a direction opposite to the transport direction of the vehicle body W. That is, in the state shown in FIG. 1, they are arranged from the upper left to the lower right. A side air blow device 44 is disposed on the edge side of the semi-cylindrical vacuum device 43 in the vehicle body transport direction. The side air blow device 44 is provided inside the semi-cylindrical vacuum device 43, and is provided in the air supply tube 45 inclined upward in the direction opposite to the transport direction of the vehicle body W along the shape thereof, and the air supply tube 45. And a plurality of air nozzles 46 for ejecting an air flow obliquely downward in a direction perpendicular to the axial direction and in the opposite direction to the vehicle body transport direction. In the air supply pipe 45,
Air is introduced from an air supply duct (not shown) through an air supply pipe 45a, and an air flow is ejected from a plurality of front air nozzles 46 toward the surface of the vehicle body W, thereby transferring the fine particles adhering to the surface to the vehicle body. Splash in the opposite direction.

Now, with such a configuration, the body W
Is transported into the dust removing booth 1, first, the upper surface dust removing device 20 disposed on the front side in the transport direction of the vehicle body is driven by the servo motor.
By the operation of 23, a plurality of air nozzles 32 ejects an air flow while moving up and down in accordance with the shape of the upper surface of the vehicle body while maintaining a certain distance in proximity to the vehicle body surface. The plurality of air nozzles 32 are disposed on the air supply pipe 31 bent in a rectangular shape in a plan view, and are orthogonal to the axial direction thereof, and are directed obliquely downward in a direction opposite to the vehicle body transport direction. The ejected air flow is
The grinding residue adhering to the vehicle body surface is scattered from the center of the vehicle body upper surface toward both sides, that is, in the left-right direction with respect to the conveyor axis, and in the direction opposite to the vehicle body transport direction. The scattered ground cake is efficiently collected on the opening surface 29a of the vacuum device, and is forcibly discharged to the outside of the dust removal booth 1 by the suction duct 35 at the rear thereof. Next, the vehicle body W transferred to the side dust removing device 40 on the front side in the transfer direction is subjected to air from a plurality of air nozzles 46 of an air supply pipe 45 vertically inclined upward in a direction opposite to the transfer direction to the surface thereof. A stream is ejected. The plurality of air nozzles 46 are orthogonal to the axial direction of the inclined air supply pipe 45 and are directed obliquely downward in a direction opposite to the vehicle body transport direction, so that the plurality of air nozzles 46 adhere to the vehicle body surface. The ground cake is scattered downward from above the side of the vehicle body and in the direction opposite to the vehicle body transport direction. The scattered ground cake is efficiently collected on the opening surfaces 43a, 43a of the vacuum device, and is forcibly discharged to the outside of the dust removal booth 1 by suction ducts 47, 47 at the rear thereof. In addition, each of the semi-cylindrical vacuum devices of the upper surface dust remover 20 and the side dust remover 40 is a vehicle body W.
An opening surface facing the vehicle body W is disposed parallel to the surface of the vehicle body W or slightly inclined with respect to the vehicle body transport direction. And
The air blow device has been described with respect to an example in which the semi-cylindrical vacuum device is installed. The vacuum device may be provided separately from the air blow device so that the opening surface is positioned at the opening.

〔The invention's effect〕

According to the dust removing method and the apparatus of the present invention having the above-described configuration, the dust adhering to the surface of the work protrudes above the work at the center of the work upper surface as compared to the both sides of the work upper surface. By passing through an upper surface air blow device having an air supply pipe in a horizontal shape as viewed in a plan view, it scatters from the work surface to the work conveyance direction from the center of the work upper surface to both sides, In addition, the work side surface is passed through a side air blow device having an air supply pipe which is vertically inclined on both sides of the work in a direction opposite to the work transfer direction, so that the work side surface is in the work transfer direction. The air flow that scatters from above to below and that is ejected from each air blow device is directed diagonally downward in the direction opposite to the work transfer direction, so that dust Direction is a constant. Therefore, the dust scattered from the surface of the work is always directed from the front to the rear of the work in the direction opposite to the traveling direction, so that the dust scattered to the surface of the cleaned work is minimized. Can be prevented. Furthermore, by the air flow ejected from the plurality of nozzles of each of the air blow devices,
Dust scattered from the work surface is collected in a semi-cylindrical vacuum device with an open front, and is forcibly discharged outside the dust removal booth by a suction duct. Dust can be collected and removed, which is more effective. As described above, according to the present invention, there is no danger of dust re-scattering on the cleaning surface of the work, so that occurrence of a defective accident in the next painting process can be prevented beforehand, and quality in the subsequent process can be reduced. Stability can be achieved.

[Brief description of the drawings]

1 shows an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a device for removing dust inside a dust removing booth, and FIG. 2 is a plan view of a dust removing chamber of the device. is there. FIG. 3 is a top view of the dust remover II in FIG.
FIG. 4 is a sectional view taken along the line IV-IV in FIG. Fig. 5 is a plan view of the side dust removing device as viewed from the direction of the arrow V in Fig. 1, and Fig. 6 is a sectional view of the same taken along line VI-VI. 1 dust removal booth, 8 dust removal chamber 9 base, 10 truck 20 truck top dust removal device 29 semi-cylindrical vacuum device 29a opening surface 30 top air blow device 31 Air supply pipe bent in a rectangular shape 32 Air nozzle, 40 Side dust removal device 43 Vacuum device semi-cylindrical 43a Opening surface 44 Air blow device 45 inclined upward 46 …… Air nozzle, W …… Work (body)

Claims (4)

(57) [Claims] 1. A top surface air blow device having a rectangular air supply pipe in a plan view, which transports a work placed on a carriage in a predetermined direction inside a dust removal booth, and both sides of the work. By passing through a side air blow device having an air supply pipe vertically inclined in the direction opposite to the workpiece transfer direction, a plurality of air nozzles arranged in the air supply pipes of the respective air blow devices,
The air stream is blown out obliquely downward in the direction opposite to the work transfer direction, and dust adhering to the work surface is removed from the center of the work upper surface with respect to the work transfer direction. A dust removal method, wherein the dust is scattered from the work surface so as to reach both sides and to move the work from the upper side to the lower side of the work side with respect to the work conveyance direction. 2. Dust scattered from the surface of a work is collected by a semi-cylindrical vacuum device having an open front surface by an air flow ejected from a plurality of nozzles of each air blow device, and is suctioned outside a dust removal booth by a suction duct. The dust removal method according to claim 1, wherein the dust is forcibly discharged to a drain. 3. A work placed on a carriage and transported in a predetermined direction inside a dust removal booth, and a plan view in which a central portion protrudes above the work so that a central portion protrudes from both sides of a top surface of the work. An upper surface air blow device having a rectangular air supply pipe, and a side air blow device having an air supply tube vertically inclined on both sides of the work in a direction opposite to the work conveyance direction, and each of the air A dust removing device comprising a supply pipe provided with a plurality of air nozzles for ejecting an air flow onto a work surface so as to be directed obliquely downward in a direction orthogonal to an axis of the supply pipe and in a direction opposite to a work transfer direction. 4. A semi-cylindrical vacuum device having an open front surface for collecting dust scattered from the surface of the work is disposed in proximity to the rear of each air blow device, and discharges the dust behind the vacuum device. The dust removing device according to claim 3, wherein a suction duct for the dust is provided.