JPS5915034B2 - automatic painting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic painting device for optimally painting an automobile body moving along a conveyance path.

More specifically, the present invention relates to an automatic painting apparatus that is used in an automobile body painting line where various types of objects to be coated are conveyed, and is most suitable for painting the so-called head car parts of the exterior surfaces of automobile bodies. It is something.

Conventionally, the so-called rocker parts of automobile bodies are important in terms of their coating durability - that is, weather resistance, peeling resistance, and impact resistance - for reasons such as the difficulty of automatic painting. However, there was no equipment available to adequately coat this rocker section.

In other words, the rocker section of an automobile body refers to the lowest part of the side surface of the exterior surface of the body, and the rocker section is usually inclined at a fixed angle in the front-rear direction of the automobile body and curved inward of the body. This is because a general coating machine for painting the top and side surfaces of an automobile body cannot adequately coat the top and side surfaces of the car body. An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to reduce the relative speed of the main body unit (to be described later) to 10 automobiles conveyed along a conveyance path to zero, thereby applying paint to areas such as rockers. An object of the present invention is to provide an automatic coating device that can apply optimal coating.

The structure of the present invention is an automatic painting apparatus for painting a lower blade on the side surface of an automobile body, in which a machine frame whose inclination angle can be freely set is disposed along a conveyance path of the vehicle body, and the machine frame is attached to the vehicle body. A synchronizing arm is provided to support a main body unit that reciprocates in the conveyance direction, and a synchronization arm is provided on the main body unit that can be freely engaged with and detached from the vehicle body being conveyed. The present invention is characterized in that the main body unit supports a coating machine that is driven reciprocally along the road.

Hereinafter, one embodiment of the present invention will be described with reference to 25 automatic painting apparatuses for painting the head part of the exterior surface of an automobile body.
This will be explained based on the diagram. FIG. 1 shows a perspective view for explaining the main components of the present invention, and first, the configuration of the present invention will be explained based on this FIG.

A machine frame 1 is arranged along the conveyance direction of the object to be coated, that is, the conveyance direction A of the automobile body, and the machine frame 1 has one end rotatably supported by support brackets 2, 2, and the other end is supported by hydraulic cylinder devices 3, 3, 3 so as to be vertically movable.

The reason why the machine frame 1 is configured to be rotatable in this way is that the machine frame 1
This is to make the inclination angle of 35 coincide with the inclination angle of the rocker portion of the automobile body. That is, the head car portion is generally inclined in the A direction at different angles of inclination depending on the type of vehicle. If the hydraulic cylinder devices 3, 3, and 3 are driven to make the inclination angle of the machine frame 1 match the inclination angle of a part of the rocker, the top of the machine frame 1 is moved to B-
Since the coating machines 4, 4' reciprocating in the direction B' can move along the rocker part, the rocker part can be completely coated from one end to the other. In this way, the inclination angle of the machine frame 1 is set independently depending on the vehicle type, but the setting operation of this inclination angle is different for the type of car podium 1 that is continuously conveyed in the A force direction. This is carried out by controlling the lift amount of the hydraulic cylinder devices 3, 3, 3 by a control device (not shown) which detects with a detection means such as a phototube and generates a control signal.

In addition to controlling the hydraulic cylinder devices 3, 3, 3, this control device can also have various control functions to be described later.

A known device may be used as the control device. On the other hand, a main unit 5 is supported on the machine frame 1 by wheels 6, 6, . . . so as to be able to reciprocate in the C-C' direction (same as the B-B' direction). When the main unit 5 is in the
is assumed to be in its original position.

The main unit 5 is connected to a hydraulic cylinder device 7 for returning to the original position, and the hydraulic cylinder device 7 is used to return the main unit 5 to the original position after the main unit 5 moves in the C direction and painting is completed. be. Movement of the main unit 5 in the C direction is controlled by limit switches L, , fixed to the machine frame 1.
The signals detected by the limit switches L2 and L3 and generated by these limit switches L1, L2, and L3 may be input to the aforementioned control device, and the control device may cause the hydraulic cylinder device 7 to perform a return operation. Limit switch Ll, L2,
Each L3 has a different function.

That is, the limit switch L issues a signal for confirming the original position of the main body unit 5, thereby maintaining the hydraulic cylinder device 7 in the OFF state. In addition, the limit switch L2 functions to detect the end of movement of the main body unit 5 in the C direction, whereby the synchronizing arm 8 falls down via the hydraulic cylinder device 9, which will be described later, and at the same time the hydraulic cylinder device 7 is activated. This is to return the main unit 5 to its original position. The limit switch L3 is used to prevent the main unit 5 from overshooting, and when the main unit 5 kicks the limit switch L3, the limit switch L3 issues a stop signal for the automobile body conveyor. In short, the limit switch L3 functions as a kind of safety device to prevent the device of the present invention from being destroyed. An L-shaped arm holding frame 5a is also fixed to the main body unit 5, and a rotating shaft 8a with a synchronizing arm 8 fixed to one end is attached to an end of the arm holding frame 5a. The rotating shaft 8a is connected to a hydraulic cylinder device 9 via a link 9a, and the operation of the hydraulic cylinder device 9 allows the synchronizing arm 8 to rotate in the D-direction. Limit switch L
Reference numeral 4 designates a limit switch for detecting the operating state of the hydraulic cylinder device 9, that is, the upright/tilted state of the synchronizing arm 8. Hydraulic cylinder device 9 is arm holding frame 5a
Of course, it is integrally fixed to. Painter units 1 and 0 are attached to the main body unit 5 so as to be able to slide freely in the B biasing direction, and this paintr unit 10 is driven by a paintr unit registration mechanism 11.

That is, the coating machine unit registration mechanism 11 drives the belt 14 wound around the two pulleys 12 and 13 one rotation, and in conjunction with the rotation of the belt 14, the coating machine unit 10 rotates.
performs a registration operation, that is, an operation in the B-B' force direction. The sprayer unit 10 includes a sprayer holding member 10.
A is attached to the atomizer holding member 10a, and a atomizer 4, 4' is rotatably attached to the atomizer holding member 10a, supported by a shaft 10b.

The sprayer holding member 10a is also supported so as to be movable back and forth, and is moved back and forth in conjunction with the hydraulic cylinder device 17. Further, the shaft 10b is connected to the hydraulic cylinder device 1 via a link 15.
6, and the shaft 10b is rotated by the operation of this hydraulic cylinder device 16, so that the spray shafts of the spray machines 4, 4' can take any angle. Limit switches L5 and L6 are used to detect whether or not the spray axes of the coating machines 4 and 4' form a desired angle. Further, it goes without saying that the hydraulic cylinder device 16 is fixed to the paint sprayer holding member 10a. Hydraulic cylinder units 16, 17 also extend and retract their piston rods by the desired amount in response to control signals issued by the aforementioned control unit to ensure that the paint sprayer 4, 4' is positioned at the correct angle and position on the rocker portion of the vehicle body. Keep your distance and face each other.

L8 is a limit switch for detecting that the paint sprayer unit 10 is in its original position, and L7 is a safety device in case the paint sprayer unit 10, which has been returned by the registration process, passes the limit switch L8 and goes too far. It is a barrel limit switch, and limit switch L7
When this starts, the paint machine unit registration mechanism 11 automatically stops its operation.

The limit switch L9 is for detecting the intermediate movement state of the paint sprayer unit 10, and the limit switch LlO is for detecting the forward end of the paint sprayer unit 10 and reversing the paint sprayer unit registration mechanism 11. Further, the limit switch Lll is used to prevent the paint sprayer unit 10 from overshooting the forward end.

When the limit switches L, . are activated, the conveyor for the car body automatically stops. Next, the configuration of each part of the automatic coating apparatus shown in FIG. 1 will be explained in more detail based on FIGS. 2 to 8.

An automobile body 18, which is an object to be coated, is placed on a trolley 19 and moves on rails 20, 20.

The part of the automobile body 18 that is painted by the apparatus of the present invention is the part indicated by the number 18a. An engagement plate 19a that engages with the synchronization arm 8 is integrally fixed to the side surface of the truck 19. The automobile painting apparatuses X, which are arranged around the machine frame 1 as shown in FIG. 1, are arranged so as to face each other with rails 20, 20 in between (see FIG. 3).

The automobile body 18 has rocker parts 18a on both sides.
This is because these rocker parts 18a are to be painted at the same time. The paint sprayer unit 10 has rollers 21, 21, 21, . The sprayer unit 10 engages with the rails 22, 22 so as to sandwich them, and the sprayer unit 10 reciprocates along these rails 22, 22.

Further, a hydraulic cylinder holder device 17 is interposed between the connection channel 23 of the sprayer unit 10 and the sprayer holding member 10a, and by operating the hydraulic cylinder device 17, the sprayer holding member 10a is moved in the front-rear direction, that is, the E -Move in the E' direction.

That is, as shown in FIG.
rollers 28, 28, 28, . . . are attached to the rollers 28, 28, 28,...
By engaging these rollers 28, 28, . . . with a rail board 29 fixed to the connecting channel 23, the paint sprayer holding member 10a is supported so as to be slidable in the direction EE'. Furthermore, a shaft 1 supporting the coating machines 4, 4
Shielding plates 25, 25 are connected to 0b via arms 24, 24.
are attached, and rollers 26, 26 are attached to the tips of the shielding plates 25, 25 for sliding contact with the automobile body 18. Compression coil springs 27, 27 are interposed between the arms 24, 24 and the shielding plates 25, 25,
When the rollers 26, 26 come into sliding contact with the automobile body 18, the shielding plates 25, 25 can escape downward, respectively. Further, FIG. 8 shows a state in which limit switches L5, L6 for detecting the inclination angle of the paint sprayers 4, 4' are engaged with the shaft 10b via a cam 30.

When the shaft 10b rotates, the limit switches L5 and L6 each perform on-off operation via the cam 30.
This allows the inclination angle of the shaft 10b to be detected. Hereinafter, the operation of the present invention will be explained mainly based on FIG.

An automobile body 18 is placed on a trolley 19 and moved to the rail 2.
When the vehicle is conveyed in the A direction on the 0.0, 20, the control device first determines the type of vehicle using a detection means such as a phototube.

When a vehicle type identification signal is manually input to the control device, the control device sends a control signal matching the vehicle type to the hydraulic cylinder devices 3, 3.
, 3, the hydraulic cylinder device 16, and the hydraulic cylinder device 1
7. The inclination angle of the machine frame 1 is adjusted by the hydraulic cylinder devices 3, 3, 3, so that the main body unit 5 can be moved along the rocker portion 18a of the automobile body 18. Further, the inclination angle of the sprayers 4, 4 is adjusted by the hydraulic cylinder device 16, and the coating distance is adjusted by moving the sprayer holding member 10a back and forth (movement in the E-E' force direction) by the hydraulic cylinder device 17. , this causes the coating machines 4, 4'
This makes it possible to maintain the optimum sprayer angle and coating distance for the rocker portion 18a of the automobile body 18.
Next, the hydraulic cylinder device 9 is operated by the control device,
The synchronous arm 8 rotates in the child direction and stands up, and the synchronous arm 8 engages the engagement plate 1 of the truck 19 on which the automobile body 18 is placed.
It becomes possible to engage with 9a. And limit switch L4
, Ll, and L8 are confirmed, and the preparation of the coating machine is determined by the AND operation of these three limit switches. In other words, when all three limit switches are working, the preparation for painting is OK and you can move on to the next process, but if even one limit switch is not working, it is treated as an abnormality in the paint machine, and the car body 18 is be allowed to pass. When the coating machine is ready, the engagement plate 19a of the truck 19 engages with the synchronization arm 8, and the main unit 5 starts moving in the direction B together with the truck 19.

That is, the relative speed of the main body unit 5 with respect to the cart 19 is set to zero. Then, limit switch L1 turns off, and after turning off? The loading machine unit registration mechanism 11 starts normal rotation and the coating machine unit port 0 is C.
Perform movement in the direction. Furthermore, in response to the off signal of the limit switch L1, a timer for supplying paint to the paint machine 4 is started, and the paint machine 4 paints the rocker portion 18a of the automobile body 18. The coating on/off timing of the coating machine 4 is controlled by a control device to suit each vehicle type. Next, when the paint sprayer unit 10 kicks the limit switch LlO, the paint sprayer unit registration mechanism 11
The forward rotation of the synchronizing arm 8 stops, and at the same time, the synchronizing arm 8 falls in the D direction.

On the other hand, when the main unit 5 kicks the limit switch L2, the synchronizing arm 8 is forced to fall in the D direction, allowing the trolley 19 to pass in the A direction.

The reason why the synchronizing arm 8 is configured to fall down separately according to the signals generated by the limit switches LlO and L2 is to provide a kind of safety function. Limit switch LlO,
When L2 does not work properly, limit switch Ll
1 and L3 will operate, but the paint sprayer unit 10
When the main body unit 5 kicks the limit switch Lll and when the main body unit 5 kicks the limit switch L3, both are treated as a paint machine abnormality.In particular, if the main body unit 5 overruns after kicking the limit switch L3, the safety valve (
(not shown) is activated, and the synchronizing arm 8 is designed to fall down.

When the synchronizing arm 8 and the carriage 19 are disengaged, the synchronizing arm 8 returns to its original position. and,
After the limit switch LIO is turned on, the paint sprayer unit registration mechanism 11 is reversed, and the paint sprayer unit 10 returns to its original position.

During this time, no coating on/off operation is performed. and,
After the limit switch LlO is kicked, the hydraulic cylinder device 7 is activated to return the main unit 5 to its original position.On the other hand, when the sprayer unit 10 kicks the limit switch L8, the reverse rotation of the sprayer unit registration mechanism 11 is stopped. Further, even if the limit switch L6 does not operate normally, the limit switch L7 is operated and this reverse rotation operation is stopped.

Then, when the main body unit 5 kicks the limit switch L, the operation of returning the main body unit 5 to its original position is completed.

On the other hand, the operation of the limit switches L4, L1, and L8 is confirmed at the check point of the control device, and normality or abnormality is confirmed by the AND signal of these limit switches.

In the case of an abnormality, it is treated as a failure in the original position, and the following operations are not performed. At this point, the coating of the rocker part 1-8a by the coating machine 4 is completed.

Next, a quarter panel portion (not shown) of the automobile body 18 is coated by the coating machine 4' in the same manner as described above.

That is, in the normal case, the coating machine unit registration mechanism 11 starts normal rotation from a predetermined position specified by the control device, and the quarter panel coating machine 4' rotates the quarter panel according to the set timer counter. The panel will be painted.

Then, when the paint sprayer unit 10 kicks the limit switch L9, the above-mentioned forward rotation operation stops, and even if it passes through the limit switch L, it stops when it reaches the limit switch LlO.

Further, when the paint sprayer unit 10 runs and kicks the limit switch Lll, a paint sprayer abnormality occurs in which the paint sprayer is running too far. After kicking the limit switch L, the register operation of the sprayer h knit register mechanism 11 is reversed, and the sprayer unit 1
0 returns to the original position.

Then, when the coating machine unit 0 kicks the limit switch L8, the reverse rotation stops, and even if it passes the limit switch L8, it reaches the limit switch L7 and stops. After the above operations are completed, the hydraulic cylinder devices 3, 16, and 17 return to their original positions, and the coating device itself returns to its initial standby state. It is clear that the versatility of the apparatus of the present invention will be further expanded if the heights of the coating machines 4, 4' are set by a control device.

As explained above, according to the automatic painting device of the present invention,
It is possible to reliably apply the optimum coating to the parts to be painted, such as parts of the car body that are being transported along the transport route.
Furthermore, as mentioned above, since the relative speed is zero, ``coating can be done regardless of the conveying speed of the object to be coated, and the forward rotation of the paint sprayer unit continues until the specified limit switch is turned on.'' Therefore, even if the conveyor stops during forward rotation of the coating machine unit, painting will continue until the painting of the target object is completed, resulting in the occurrence of coating defects due to the conveyor stopping. This has the effect of completely solving this problem.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the outline of the configuration of the present invention, FIG. 2 is a schematic side view of an automatic painting apparatus of the present invention, FIG. 3 is a side view showing the arrangement of the present invention, and FIG. 4 is a side view showing the arrangement of the present invention. The rear view of the device, Figure 5 is a side view of the sprayer unit, Figure 6 is a top view of the sprayer unit, Figure 7 is a front view of the sprayer unit, and Figure 8 is the front view of the cam for setting the sprayer angle. It is a diagram. 1...--Machine frame, 3, 7, 9, 16, 17...
... Hydraulic cylinder device, 8 ... Synchronous arm, 1
0... Painter unit, 5... Main body unit, 11... Painter unit registration mechanism, 4,4''... Painter.

Claims (1)

[Claims] 1. An automatic painting device for painting the lower side surface of an automobile body, in which a machine frame whose inclination angle can be freely set is disposed along a conveyance path for the vehicle body, and a main body that reciprocates in the conveyance direction of the vehicle body is attached to the machine frame. A coating machine is provided which supports a unit and is equipped with a synchronizing arm that can be freely engaged with and detached from the vehicle body being transported, and which is located below the painting area of the vehicle body and is driven reciprocally along the transportation path of the vehicle body. An automatic painting device supported by the main body unit.