JPH0710364B2 - Grounding method and equipment for finished vehicles - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for removing static electricity in a painting process of an automobile manufacturing plant, and more particularly to a method and apparatus for removing static electricity in a painting process for a bottom surface of a finished vehicle.

(Prior art) Finished cars that pass the inspection are coated with bituminous paint in pit-shaped booths for the purpose of rust prevention of parts other than exhaust related parts on the bottom of the car body and soundproofing of the interior ing.

By the way, since finished cars already have rubber tires, it is dangerous to apply paint to them because static electricity may be charged. It is held between clips to prevent electrostatic charge.

(Problems to be Solved by the Invention) In the conventional technology, when a method of applying a coating robot or the like installed on each part while continuously transporting a completed car on a conveyor is adopted, unpainted parts In order to prevent interference with the painting robot etc. due to the movement of the metal clip accompanying the transportation of the completed car, the method of sandwiching and fixing the metal clip etc. is a large scale of automatically fixing and releasing the metal clip etc. There was a problem that various facilities were required.

The present invention has been made in view of such problems of the conventional technique, and an object of the present invention is to easily remove static electricity at the time of painting the bottom surface of completed vehicles that are continuously transported. An object of the present invention is to provide a grounding method for a vehicle and a device therefor.

(Means for Solving the Problem) In order to solve the above-mentioned problems, the present invention receives a tire of a completed vehicle by a conveyor on a frame, and continuously conveys the completed vehicle by this conveyor, and a necessary portion on the bottom surface of the completed vehicle. In the grounding method of a completed car when painting with a painting robot, etc., the conductive tentacles that are made to be upright and fallen freely by the driving means and elastically applied are attached to the frame. The body of the completed car was grounded by sliding it on the unpainted part on the bottom of the car.

Further, a conductive tentacle device having a conductive tentacle which can be raised and lowered by a driving means is provided at least at two or more locations along the transport direction, and at the time of painting, at least one conductive tentacle is not painted on the bottom surface of the completed vehicle. You may make it slide-contact with a part.

In addition, the tire of the finished car is received by the conveyor on the frame, and while the finished car is continuously conveyed by this conveyor, the frame of the finished car grounding device when painting the necessary parts on the bottom surface of the finished car by the painting robot etc. And a conductive tentacle which has an elastic force and is brought into contact or non-contact with the unpainted portion on the bottom surface of the completed vehicle by standing up or down by the driving means.

In addition, at least two or more conductive tentacle devices, each of which is provided with a conductive tentacle that can be raised and lowered by the driving means, are provided in the longitudinal direction of the frame.

(Function) The present invention configured as described above is configured such that the conductive tentacle fixed to a predetermined portion of the frame is erected to stand up so as to remove static electricity generated when the paint is applied while the completed vehicle is continuously conveyed. It makes sliding contact with the unpainted part on the bottom surface, and works to reliably ground the vehicle body while continuously transporting completed vehicles.

At this time, since the conductive tentacles are fixed to the frame and do not move, wirings such as conductive members extending from the conductive tentacles do not interfere with surrounding coating robots and the like.

(Example) Below, the Example of this invention is described based on an accompanying drawing.

FIG. 1 is a schematic side view of a coating process to which a grounding device for a completed vehicle according to the present invention is applied, and FIG. 2 is a front view of the same.

As shown in FIG. 1 and FIG. 2, a conveyor 3 that continuously receives and conveys tires 2 of a completed vehicle 1 and a plurality of frames 5 installed on a frame 5 laid on a pillar 4 below the bottom surface of the completed vehicle 1. The coating process is composed of the conductive tentacle device 6 and the coating robot 8 that holds the coating gun 7 for coating the bottom surface of the completed vehicle 1. Here, 9 is a paint booth, 10 is an engine,
11 and 12 are an exhaust pipe and a muffler, which are unpainted parts to which no paint is applied.

Further, FIG. 3 is a bottom view of the completed vehicle 1, 13 is a coating section to which the coating robot 8 applies the coating material, and 14 is a gasoline tank.

The conductive tentacle device 6, as shown in FIG.
Two bars with one end rotatably fitted to the shaft 15 fixed to the
A link mechanism is constituted by 16, 17 and a bar 19 rotatably connected to the other ends of these bars 16, 17 via a shaft 18. A cylinder 22 is rotatably supported on a bracket 20 fixed to the frame 5 via a shaft 21, and a cylinder rod 23 is connected to a central portion of a bar 17 via a double knuckle 24. Therefore bars 16, 17, 19 and cylinder 22
The driving means is configured by the above. The conductive tentacle 26a is fixed to the end of the bar 16 on the frame 5 side via the bracket 25, and the bracket 25 and the insulating member 27 are also attached to the end of the bar 17 on the frame 5 side via, for example, bakelite. The conductive tentacle 26b is fixed.

As shown in FIG. 5 and FIG. 6, the conductive tentacles 26a and 26b are, for example, elastic piano wires 26c arranged in a strip shape, and are arranged in two stages to bundle the respective piano wires 26c. One end of is fixed to the fixing bracket 28. Further, the fixed bracket 28 is fixed to the bracket 25 with bolts 31 via a base 29 fixed with bolts 30.

Incidentally, FIG. 5 shows a case where the conductive tentacle 26b is fixed to the bracket 25 via the insulating member 27 and the like.

Therefore, the conductive tentacle 26a fixed to the bar 16 is attached to the bracket 2
It may be grounded through 5, the bar 16, the frame 5 and the pillar 4, etc., or as shown in FIG.
It may be grounded directly by 32.

On the other hand, the conductive tentacle 26b fixed to the bar 17 via the insulating member 27 and the like is connected to the ground confirmation circuit 35 shown in FIG. Here, 36 is a voltmeter, 37 is a DC power supply, 38 is an internal resistance of the explosion-proof barrier, and 39 is a current limiting resistance. Further, in FIG. 8, 40 is a bar 1
The contact resistance between the conductive tentacles 26a, 26b fixed to the 6, 17 and the exhaust pipe 11 or the muffler 12, and the conductive tentacle 26 in contact with the exhaust pipe 11 or the muffler 12
It is a combined resistance with the electric resistance between a and 26b.

The operation of the present invention configured as described above will be described.

First, when the completed vehicle 1 is conveyed to the coating process by the conveyor 3, it is detected by a detector (not shown), and a control device (not shown) is attached to the conductive tentacle device 6 and the rod 23 of the cylinder 22 is predetermined. Contract. Then the conductive tentacles 26
The a and 26b rise by the rotation of the shafts 15 of the bars 16 and 17 as fulcrums and come into contact with the exhaust pipe 11 or the muffler 12 of the completed vehicle 1 with an appropriate elastic force as shown in FIG.
Thereafter, the painting robot 8 applies bituminous paint or the like to the painting portion 13 on the bottom surface of the completed vehicle 1. During this painting operation, the completed vehicle 1 is continuously conveyed, but the detectors are set in advance so that the tentacles 26a, 26b of the conductive tentacle device 6 cannot contact the exhaust pipe 11 or the muffler 12 in the unpainted portion. When detected by (not shown), the control device contracts the rod 23 of the cylinder 22 of the other conductive tentacle device 6 to bring the conductive tentacles 26a and 26b into contact with the exhaust pipe 11 or the muffler 12.

Therefore, while the coating robot 8 is applying the coating material, one of the conductive tentacles 26a, 26b is always in contact with the exhaust pipe 11 or the muffler 12 of the non-coating portion with appropriate elasticity. Static electricity that may occur can be reliably grounded.

Therefore, one conductive tentacle 26b provided on the same conductive tentacle device 6 is fixed to the bracket 25 via the insulating member 27 as shown in FIG. When the member 32 is connected to the ground confirmation circuit 35 shown in FIG. 7, the ground state of the completed vehicle 1 can be confirmed through the contact state between the conductive tentacles 26a, 26b and the completed vehicle 1 by the value of the voltmeter 36.

That is, if the value of the voltmeter 36 indicates the voltage value of the DC power supply 37, it means the non-grounded state, and if it is smaller than the voltage value of the DC power supply 37, it means the grounded state.

However, the voltage and current between the conductive tentacles 26a, 26b and the non-painted exhaust pipe 11 or muffler 12 are preferably low voltage and minute current so as not to cause sparks.

(Effects of the Invention) As described above, according to the present invention, it is possible to easily prevent static electricity from being charged when painting the bottom surface of a completed vehicle.

Further, by providing the conductive tentacle device at at least two places or more, it is possible to surely remove static electricity from completed vehicles that are continuously conveyed.

Furthermore, even if the position of the unpainted part of the completed car changes, it can be easily handled by changing the fixed position of the conductive tentacle.

In addition, a suitable contact resistance can be secured by the elastic conductive tentacle.

[Brief description of drawings]

FIG. 1 is a schematic side view of a coating process in which a grounding device for a completed car according to the present invention is applied, FIG. 2 is a front view of the same, FIG. 3 is a bottom view of the completed car, and FIG. FIG. 5 is an enlarged view of a portion, FIG. 5 is a side view of a conductive tentacle fixed through an insulating member, FIG. 6 is a top view of the same, FIG. 7 is a configuration diagram for confirming a grounded state, and FIG. It is an equivalent circuit of the figure. In the drawings, 1 is a completed car, 2 is a tire, 3 is a conveyor,
5 is a frame, 6 is a conductive tentacle device, 8 is a coating robot, 11 is an exhaust pipe, 12 is a muffler, 13 is a coating part, 16, 17 and 19 are bars, 22 is a cylinder, and 26a and 26b are conductive tentacles. is there.

Claims (4)

[Claims] 1. A ground of a completed vehicle when a tire of the completed vehicle is received by a conveyor on a frame, and the completed vehicle is continuously conveyed by the conveyor while painting is performed on a required portion of the bottom surface of the completed vehicle by a painting robot or the like. In the method, the frame is attached to the frame and is erected by driving means.
A grounding method for a completed vehicle, in which a conductive tent that is laid down and has elastic force is brought into sliding contact with an unpainted portion of the bottom surface of the completed vehicle to ground the vehicle body of the completed vehicle. 2. A conductive tentacle device comprising a conductive tentacle that can be raised and lowered by driving means is provided at least at two or more locations along the transport direction, and at least one conductive tentacle is the bottom surface of the finished vehicle during painting. The grounding method for a completed vehicle according to claim 1, wherein the grounding method is in sliding contact with the unpainted portion. 3. A ground of a finished car when a tire of the finished car is received by a conveyor on a frame, and while the finished car is continuously conveyed by the conveyor, a required portion of the bottom surface of the finished car is painted by a painting robot or the like. In the apparatus, it comprises a driving means provided on the frame, and a conductive tentacle which is in contact with or non-contact with an unpainted portion of the bottom surface of the completed vehicle by standing up or down by the driving means and has elastic force. A grounding device for completed vehicles. 4. The grounding device for a completed vehicle according to claim 3, wherein the conductive tentacle device including the conductive tentacles which can be raised and lowered by the driving means is provided at least at two or more positions in the longitudinal direction of the frame.