JPH0675693B2 - Vehicle electrostatic coating line - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electrostatic coating line for electrostatically coating a vehicle body.

(Prior Art) Conventionally, when painting a vehicle body, in order to apply the paint evenly to the body, electrostatic painting is generally adopted in which the paint is applied to the positive side and the body is grounded to the negative side. ing.

However, in the above electrostatic coating, paint is attached to the surface of the body, and particles floating in the air due to the above-mentioned electrification easily attach. Repairs are required.

Therefore, before performing electrostatic coating on the electrostatic coating line,
For the purpose of quality improvement, in the preparatory room, an electrostatic removal device performs an electrostatic removal blow on the body to remove adhered substances. The static eliminator decomposes air molecules to generate positive and negative ions, and blows the ionized air to a charged body, and the molecules ionized to the same pole in the air repel from the body. The opposite is to remove the static electricity charged in the body by being attracted. After the static electricity charged on the body is removed by the above-mentioned static electricity removal blow, an air blow is further applied to remove adhered substances such as dust attached to the body, and then electrostatic coating is performed.

However, it has been found that, when the static electricity removing blow is performed by the static electricity removing device, it is conventionally performed in a state where the body is grounded, and the effect is reduced.
That is, when the body is grounded, even if air blowing is performed, the particles separated from the body are likely to adhere to the body again.

(Object of the Invention) In view of the above circumstances, the present invention aims to provide an electrostatic coating run for a vehicle that improves the air blowing effect in an air blowing step for removing deposits before performing electrostatic coating. It is what

(Structure of the Invention) The electrostatic coating line of the present invention includes an electrostatic coating step of performing electrostatic coating on a body and an air blowing step of performing air blowing on the body before electrostatic coating. Is placed on a trolley and conveyed from the air blow process to the electrostatic coating process.In the air blow process, an insulating means is provided to insulate the trolley rail on which the trolley travels to keep the body in an insulated state. It is characterized in that grounding means for grounding the body via a trolley is provided.

(Effect of the Invention) According to the present invention, in the air-blowing step of removing the deposits on the body before electrostatic coating, the body is insulated by the insulating means so that the body is separated from the body by air-blowing. The particles can be prevented from adhering to the body again, the air blowing effect in the air blowing step can be improved, and the repair work after electrostatic coating can be reduced.

The body is placed on a trolley and transported from the air blow process to the electrostatic coating process, and in the air blow process, the trolley rail on which the trolley runs is insulated to insulate the body. Then, the body is grounded by releasing the insulated state of the truck rail, and the insulated state and the grounded state can be changed without any structural change in the structure for mounting the body and the truck.

(Examples) Examples of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of an electrostatic coating line.

The electrostatic coating line A is, for example, a top coating that is applied by electrostatic coating to the body 1 of the vehicle. An air blow process A ₁ is performed to blow air onto the body 1 before electrostatic coating.
An electrostatic coating process A ₂ for electrostatically coating the body 1 is provided.

The body 1 is mounted on a dolly 3 placed on a floor member 2, and the dolly 3 is carried into an electrostatic coating line A by a conveyor 4 of a pre-process line B (intermediate coating line) and formed separately. The air blow process A ₁ and the electrostatic coating process A ₂ conveyer 6 are sequentially transported. The cart 3 has wheels 7 mounted on the floor member 2 and a toe pin 8
Passes through the floor member 2, is engaged with the conveyor 5, and is conveyed. The trolley | bogie 3 mounts the body 1 on the jig | tool 9 of the upper surface in the conduction state.

In the air blowing step A ₁ , the body 1 conveyed by the conveyor 4 of the intermediate coating line B in the previous stage is received by the conveyor 5 and carried into the preparation chamber 10, and the body 1 is installed above the preparation chamber 10 in this preparation chamber 10. The ionized air is blown from the fixed air blower 11 and the air is similarly blown from the air blow gun 12 by the operator's operation. Body 1 in this air blowing step A ₁
And insulated by an insulating means C ₁ -C ₃ below without ground.

That is, the insulating means C ₁ between the wheel 7 and the floor member 2 of the carriage 3, the insulating means C ₂ between Topin 8 and the conveyor 5, and includes an insulating means C ₃ between Topin 8 and the floor member 2 There is. Hereinafter, these insulating means C _{1 to} C ₃ will be described in order.

First, the insulating means C between the wheels 7 of the carriage 3 and the floor member 2
₁ has a structure as shown in FIG. A metal plate slightly narrower and shorter than the insulating plate 14 is formed on the long insulating plate 14 corresponding to the length of the air blowing step A ₁ formed of an insulating material.
Place 15 and bolt them at several points as shown in Fig. 3.
It is fastened by 16 and nut 17 to form a truck rail 18. Insulating structure truck rail 18 formed as described above,
An insulating plate 14 is placed on the floor member 2 at a position where the wheels 7 run on both sides so that the wheel 7 rolls on the metal plate 15 so that the floor member 2 is insulated from the floor member 2. I will get it. In particular, the bolt 16 and the nut 17 are provided so as to project downward from the lower surface of the insulating plate 14 so as not to come into contact with the floor member 2, and the carriage rail 18 is installed so as to be exchangeable.

Next, the linkage between the toe pin 8 of the carriage 3 and the conveyor 5 has a structure as shown in FIG. Iron pushers 20 are attached to the chain 19 of the conveyor 5 installed below the floor member 2 at predetermined intervals.

The pusher 20 includes a right hook 21 and a left hook 22 arranged on both sides of the pusher center. On the other hand, the toe pin 8 attached to the truck 3 is a slit of the floor member 2.
It is inserted through both hooks 21 and 22 of the pusher 20 through 23 and engages with each other, and as the conveyor chain 19 runs in the direction of the arrow D, the right hook 21 pushes the toe pin 8 to move the carriage 3 It is to be transported. At this time, the left hook 22 restricts the moving speed of the carriage 3 from becoming faster than the moving speed of the conveyor chain 19, or restricts the runaway of the carriage 3 when the conveyor 5 is stopped.

As shown in FIGS. 5 and 6, the insulating means C ₂ between the truck toe pin 8 and the pusher 20 of the conveyor 5 in the above structure is provided with an end face member 21a (left hook) of both hooks 21 and 22 in contact with the toe pin 8. 22 is not shown), and an insulator 24 made of an insulating material such as hard plastic is attached by a countersunk screw 25 and a nut 26. In addition, dish screw
The head of 25 is installed so as to be recessed inward from the surface of the insulator 24 so that it contacts the toe pin 8 and is not grounded.
The length and the like are set so that the tip of the toe pin 8 does not come into contact with the pusher 20 or the chain 19.

Further, the insulating means C ₃ between the toe pin 8 and the floor member 2 is
Is a structure as shown in FIG. When the carriage 3 moves in a predetermined direction on the floor member 2, the toe pin 8 moves in a slit 23 formed in parallel with the moving direction. Then, in order to insulate the toe pin 8 and the floor member 2 from being brought into contact with each other and being grounded as the toe pin 8 moves in the lateral direction, the inside of the slit 23 is covered over the length of the air blowing step A ₁ . Insulation rails 27 are installed on both sides of the side surface. That is, on the inner end surface of the vertical member 2a bent from the floor member 2 forming the side surfaces on both sides of the slit 23, an insulating rail 27 made of an insulating material such as hard plastic is provided with a countersunk screw 28 and a nut 29.
It will be installed in. The dish screw 28 is installed so as not to project on the surface of the insulating rail 27 as in the above.

In addition, for example, when the body 1 is grounded by the contact of the limit switch that detects the movement of the carriage 3,
The body 1 is not grounded by performing an insulation treatment so that the insulator is interposed when the two are in contact with each other.

As described above, in the air blowing step A ₁ , the insulating means C ₁
The body 1 is held in an insulated state by C ₃ and an electrostatic discharge blow is performed in which the body 1 is blown with ionized air by the air blower 11. The static elimination blow decomposes air to generate positive and negative ions, and when the charged body 1 passes through the ionized air, the ionized molecules at the same pole of the static elimination blow By being repelled from the body 1 and the opposite one is attracted, the static electricity charged on the body 1 is removed, and along with the air blow from the air blow gun 12, the attached matter such as dust attached to the body 1 is removed. Moreover, at the time of this air blow, the body 1 is held in an insulating state by the insulating means C _{1 to} C ₃ , and the particles removed from the body 1 do not adhere to the body 1 again, and a high air blow effect is obtained.

Body 1 deposits have been removed, such as dust in the air blowing step A ₁ as described above, the engaging Topin 8 of the carriage 3 from the conveyor 5 air blow Step A ₁ to conveyor 6 of the electrostatic coating process A ₂ is moved Then, it is carried into the coating chamber 30 in the electrostatic coating process A ₂ (see FIG. 1).

In this electrostatic coating process A _2, while grounding the negative body 1 by grounding means (not shown), and performs electrostatic coating by charging the paint positively. In this case, the grounding means obtains the grounded state of the body 1 by grounding the wheels 7 of the carriage 3 to the floor member 2 or grounding the chain of the conveyor 6 via the toe pin 8.

In the above embodiment, the conveyor 5 of the air blowing step A ₁ of the electrostatic coating line A and the conveyor 6 of the electrostatic coating step A ₂ are configured separately, but both conveyors 5 , 6 may be integrated. In this case, in order to obtain the insulation state between the pusher of the conveyor and the toe pin 8 in the air blowing step A ₁ , the electrostatic coating step A ₂ is also insulated between the _two , but in this electrostatic coating step A ₂ At least, the body 1 may be grounded by at least the ground between the wheel 7 of the carriage 3 and the floor member 2.

The air blowing in the air blowing step A ₁ may be performed by blowing ionized air or simply by blowing clean air. Further, the specific structure of the insulating means in the air blowing step A ₁ is not limited to that of the above-mentioned embodiment, and a known insulating structure can be adopted.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a schematic configuration of an electrostatic coating line in one embodiment of the present invention, and FIG. 2 is a perspective view showing a partially sectional view of an insulating structure between a truck wheel and a floor member in an air blowing process. 3, FIG. 3 is a cross-sectional view of an essential part of FIG. 2, and FIG. 4 is a partial cross-sectional front view showing a linking structure between a truck and a conveyor including an insulating structure between a truck toe pin, a conveyor chain and a floor member in an air blowing process. 5, FIG. 5 is a detailed perspective view of the hook portion of the conveyor in FIG. 4, FIG. 6 is a sectional view of an essential part of FIG. 5, and FIG. 7 is a partial sectional view of the insulating structure of the slit portion of the floor member. It is a principal part perspective view. A: Electrostatic coating line A ₁ …… Air blow process A ₂ …… Electrostatic coating process 1 …… Body 2 …… Floor member 3 …… Car 5,6 …… Conveyor 7 …… Wheels 8 …… Topin, 10 …… Preparation room 11 …… Air blow device 12 …… Air blow gun C _{1 to} C ₃ …… Insulation means, 14 …… Insulation plate 18 …… Bogie rail, 19 …… Chain 20 …… Pusher, 21,22 …… Hook 23 …… Slit, 24 …… Insulator 27 …… Insulation rail, 30 …… Painting room

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroki Takase 3-3 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Co., Ltd. (56) Bibliography Sho 56-114889 (JP, U)

Claims (1)

[Claims] 1. A line for electrostatically coating a vehicle, the electrostatic coating line comprising an electrostatic coating step of electrostatically coating a body, and an air blow for the body before electrostatic coating. And an air blow process for carrying out the above, the body is placed on a trolley and conveyed from the air blow process to the electrostatic coating process,
In the air blowing step, while providing an insulating means for insulating the body of the carriage on which the carriage travels to bring the body into an insulated state,
An electrostatic coating line for a vehicle, characterized in that grounding means for grounding the body through the dolly is provided in the electrostatic coating step.