JP3404789B2 - Automotive engine room masking device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a masking device for masking an unpainted portion in an engine room when painting a wheel house of an automobile. 2. Description of the Related Art In a coating process of an automobile, a soundproof paint called an undercoat is provided separately from a basecoat process in order to impart soundproofing and pitching resistance to a lower part of a vehicle body such as a wheel house. (Sound donor) or thick film coating such as chipping-resistant paint. [0003] In the coating of such an undercoat, in particular, since the thickness of the coating is so large that adhesion to other parts due to overspray is hindered, a masking treatment of a size large enough to enter the engine room has conventionally been used as a masking treatment. The plate is automatically moved up and down, or a masking sheet is manually set in the engine room to prevent paint mist from scattering. [0004] However, in the conventional method of raising and lowering the masking plate as described above, a paper for preventing stains is pasted on the masking plate in advance, and every time the paper becomes dirty, the paper becomes dirty. Because of the replacement method, the frequency of paper replacement due to dirt is high, and there is still a problem in practicality. Further, it is difficult to mask the details in the engine room with the above-mentioned masking plate.
The paint mist due to overspray cannot be sufficiently captured. In particular, when paint is applied to the wheel house portion, paint mist enters the engine room through small holes for mounting components formed in the strut housing, so that paint mist is completely prevented from scattering. Can not do. [0006] On the other hand, in a system in which a masking sheet of paper or the like is manually pasted into an engine room, although it is possible to mask details in the engine room,
The masking process requires a great deal of man-hours and time, and cannot improve the work efficiency. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to improve the masking performance by masking details in an engine room without manual operation. Is to provide. SUMMARY OF THE INVENTION The present invention is an apparatus for masking a non-painted part in an engine room when painting a wheel house portion of an automobile, the apparatus being provided below a vehicle body to be painted. A masking unit is provided. The masking unit is provided in parallel with the front-rear direction of the vehicle body, and has a masking sheet roll on which a masking sheet is wound in a roll shape.
Provided in parallel with the masking sheet roll, a masking sheet take-up roll that takes up the masking sheet sent out from the masking sheet roll, and is provided to be vertically movable between the masking sheet roll and the masking sheet take-up roll, A lift frame that pushes up an intermediate portion of the masking sheet stretched between the masking sheet roll and the masking sheet take-up roll from below the vehicle body to be positioned in an engine room, and is provided adjacent to the lift frame. ,
The masking sea when the
Between the trawl and the masking sheet take-up roll.
Fold the masking sheet in a folding screen shape and store it
On the other hand, when the lift frame rises,
A space that allows the remaining masking sheet to be pulled out
A king sheet storing mechanism, a masking jig provided on the lift frame and capable of moving forward and backward in a vehicle width direction, and being driven forward at a position where the lift frame can move up, so as to cover an outer periphery of a strut housing in an engine room. Tool. According to this structure, the masking sheet is pushed up into the engine room by the lift frame, thereby performing a primary masking process in the engine room. That is, as the lift frame rises,
Maskin stored in the masking sheet storage mechanism
Grease sheet is pulled out sequentially and temporarily in the engine room
Masking process is performed. Meanwhile, painting work is over
When the lift frame descends, the masking sheet
Is folded into a folding screen by the masking sheet storage mechanism
It is stored. As a result, the masking sea
It is possible to use the same part of the
Become. When the masking jig provided on the lift frame advances in the vehicle width direction, the outer periphery of the strut housing in the engine room is covered with the masking jig to perform the masking process. The masking jig serves to catch paint mist that has entered the engine room through small holes or the like in the strut housing as the wheel house is painted. When the masking sheet becomes dirty, the masking sheet can be replaced with a new masking sheet surface by winding the masking sheet by a predetermined amount on a masking sheet take-up roll. That is, the masking
The masking sheet is taken up by the take-up roll
Between the trawl and the masking sheet take-up roll.
Handed over and stored in the masking sheet storage mechanism
Will be updated for the first time.
You. FIG. 1 is a structural explanatory view showing an embodiment of the present invention. A vehicle body B to be painted is suspended in a predetermined manner in a painting booth by being hung on a hanger 2 of an overhead conveyor 1. It is transported to the coating stage S and positioned. A plurality of coating robots 3 are provided on the coating stage S, and a masking unit 4 is provided immediately below a vehicle body B to be coated. The masking unit 4 is configured around a base frame 6 that can travel on the gantry 5 in the vehicle body transport direction. The base frame 6 can be moved by the operation of a traveling drive mechanism 7. A masking sheet roll 9 formed by winding a masking sheet 8 of a predetermined width such as paper on the base frame 6 and a masking sheet 8 sent out from the masking sheet roll 9 are taken up. And the masking sheet take-up roll 10 are provided in parallel with the front-rear direction of the vehicle body B. Both the masking sheet roll 9 and the masking sheet take-up roll 10 are controlled to be sent out and taken up by a drive mechanism such as a motor with a brake (not shown). The masking sheet 8 sent out from the masking sheet roll 9 is guided by the guide roller 11 and the floating roller 12 on the base frame 6 side so as to be folded in a folding screen shape, and then guided on the lift frame 15 side described later. Masking sheet take-up roll 1 via roller 16
It is guided to the 0 side. Here, the floating roller 12 can move up and down along the support 13 and rises to a position shown by a virtual line when a predetermined tension is applied to the masking sheet 8. When the floating roller 12 is at the lower limit position, the floating roller 12 serves to store the masking sheet 8 by a predetermined length. Therefore, the above guide roller
The masking sheet rolls 9 and 11 and the support 13
And the masking sheet take-up roll 10
Folded masking sheet 8 into a folding screen and store it
A masking sheet storage mechanism 20 is formed. At the center of the base frame 6, one end is fixed to the lift frame 15, and a chain is provided between two chain wheels attached to the base frame 6, and a motor for driving the lower chain wheel. And a lift frame 15 driven up and down by a lifting drive mechanism 14 comprising: The lift frame 15 is provided with a guide roller 16 for guiding the masking sheet 8, and a pair of left and right masking jigs 17 is mounted on the upper end thereof. These masking jigs 17 are connected to a piston rod of a cylinder 18 fixed to the lift frame 15 so as to cover the outer periphery of the strut housing H from inside the engine room R as shown in FIG. The cylinder 18 moves forward and backward in the vehicle width direction by the expansion and contraction operation. In the masking apparatus thus constructed, as shown in FIG. 1, the lift frame 15 waits at the lower limit position until the vehicle body B to be coated is positioned at a fixed position. When the vehicle body B is correctly positioned on the stage S, the lift frame 15 moves up to the upper limit position indicated by the imaginary line. When the lift frame 15 rises as described above, a predetermined tension is applied to the masking sheet 8, so that the floating roller 12 gradually rises in accordance with the tension, and the floating roller 12 is folded by the floating roller 12 until then. The masking sheet 8 is stretched and pushed up from below the vehicle body B into the engine room R and positioned as indicated by a virtual line in FIG. [0021] The the lift frame 15 is raised to the raised limit position a pair of cylinders 18 is extended operation, thereby masking jig 17 as shown in FIG. 2 in the engine room R in advance in the vehicle width Direction Strut housing H
Close to and cover the outer circumference. Here, the reason why the masking jig 17 is caused to move forward in the horizontal direction after the lift frame 15 is raised is that there is a space between the strut housing H and the hood F as shown in FIG. Since there is only a gap of about 40 mm, while avoiding interference between the masking jig 17 and the strut housing H or the hood F,
This is for covering the side surface and the upper surface of the strut housing H with the masking jig 17. The masking process is completed as described above, and then each of the painting robots 3 shown in FIG. 1 is started to apply the paint to the wheel house W by the spray gun 19 as shown in FIG. At this time, the excess paint mist that has been oversprayed (the oversprayed portion is indicated by the symbol Q) is captured by the masking sheet 8. At the same time, a part of the paint mist applied to the inside of the strut housing H enters the engine room R through small holes for attaching parts formed in the strut housing H. The paint mist thus collected is immediately captured by the masking jig 17. Therefore, it is possible to prevent the paint mist from being unnecessarily scattered and attached to the non-painted portion. When the coating is completed, each masking jig 17
While the lift frame 15 is lowered to the lower limit position. At this time, since the floating roller 12 is lowered by its own weight as the lift frame 15 is lowered, the masking sheet 8 does not sag unnecessarily, and the masking sheet 8 is
2 folds back to the original state. Then, as described above, the lift frame 15
Waiting for the vehicle to descend to the lower limit position, the overhead conveyor 1 is started, the vehicle body B is replaced on the painting stage S, and the above operation is repeated thereafter. If the masking sheet 8 is contaminated with paint mist, for example, if the same portion of the masking sheet 8 is used for painting two or three vehicle bodies B, the above-described painting stage S The masking sheet surface of the masking sheet 8 is updated using the replacement time of the vehicle body B. That is, the masking sheet roll 9
In addition, the drive mechanism of the masking sheet take-up roll 10 is synchronously controlled to take up a predetermined amount of the dirty portion of the masking sheet 8 around the masking sheet take-up roll 10 while a new masking sheet 8 of the same amount is taken up. Feed out from roll 9. As a result, the masking sheet surface of the masking sheet 8 is replaced with a new one. If the width of the masking sheet 8 is small compared to the size of the engine room R of the vehicle body B, the painting of the wheel house W is performed separately for the front side painting and the rear side painting. At the same time, the base frame 6 of the masking unit 4 is shifted by a predetermined amount in the vehicle front-rear direction by the operation of the traveling drive mechanism 7. As described above, according to the present invention, the masking sheet is pushed up from below the vehicle body to be painted by the lift frame to perform masking, while the strut having the small holes for mounting parts is formed. By covering the housing with a masking jig provided on the lift frame and performing a separate masking process, it is possible to completely automate the masking process so that an operator does not need to be involved in the masking process. Masking performance can be improved since details such as small holes can be reliably masked, and paint mist can be prevented from scattering. Also, there is a masking sheet storage mechanism.
Repeat the same part of the masking sheet several times
Can be used without masking sheet
Not only is there little waste, but the masking sheet can be rolled up when it becomes dirty and a new masking sheet can be updated automatically, so workers need to be involved in replacing the masking sheet and subsequent processing as in the past. Therefore, there is an effect that the man-hour for the masking process can be greatly reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration explanatory view showing one embodiment of the present invention. FIG. 2 is an operation explanatory view in which main parts of FIG. 1 are enlarged. [Description of Signs] 3 ... Painting robot 4 ... Masking unit 6 ... Base frame 8 ... Masking sheet 9 ... Masking sheet roll 10 ... Masking sheet take-up roll 15 ... Lift frame 17 ... Masking jig 18 ... Cylinder 20 ... Masking sheet storage Mechanism B ... Body H ... Strut housing R ... Engine room W ... Wheel house

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B05B 15/04 B05C 17/06 B05D 1/32

Claims (1)

(1) A device for masking a non-painted part in an engine room when painting a wheel house portion of an automobile, wherein a masking unit is provided below a vehicle body to be painted. The masking unit is provided in parallel with the front-rear direction of the vehicle body, a masking sheet roll around which a masking sheet is wound in a roll shape, and provided in parallel with the masking sheet roll. A masking sheet take-up roll for taking up the masking sheet to be sent out; and a vertically movable unit provided between the masking sheet roll and the masking sheet take-up roll, and a hook between the masking sheet roll and the masking sheet take-up roll. The middle part of the masking sheet passed A lift frame to be positioned in the engine room by pushing up from below the serial body, provided adjacent to the lift frame, a lift frame
The masking sheet roll when the
Wrapped between the masking sheet take-up roll
The masking sheet is folded into a folding screen and stored
When the lift frame rises,
Masking sheet that allows the masking sheet to be pulled out
A port storage mechanism, a masking jig provided on the lift frame and capable of moving forward and backward in a vehicle width direction, and being driven forward at a lift limit position of the lift frame to cover an outer periphery of a strut housing in an engine room. An engine room masking device for an automobile, characterized by comprising: