JPH0618600Y2 - Paint truck cleaning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an apparatus for cleaning a coating carriage conveyed along a predetermined route by a carriage conveying line.

(Prior Art) When painting a vehicle body in a production line of automobiles or the like, generally, when a vehicle body is placed on a dolly (painting dolly) that is conveyed along a predetermined circulation route by a dolly conveyance line. A method of spraying liquid paint or the like by a means such as a spray is used. As described above, during the coating work in which the vehicle body is placed on the coating carriage and the coating material is sprayed with a spray or the like, the coating material also adheres to the coating carriage.

Then, when the coating material applied to the surface of the vehicle body is dried, the coating material attached to the coating truck is dried and solidified together with it. When a new vehicle body to be coated is placed on the coating truck in this state, the vehicle body slides on the coating truck to prevent it from adhering to the coating truck. There is a possibility that the solidified coating material becomes fine powder and is separated from the coating truck and floats.

In this way, when a situation occurs in which the paint becomes a fine-grained powder and floats, when the floating powder paint is sprayed onto the vehicle body mounted on the coating carriage, the liquid paint is sprayed. In addition, there is a problem that it mixes in the liquid paint and adheres to the surface of the vehicle body, which makes it impossible to obtain a good coated surface.

For such a problem, for example, as described in Japanese Utility Model Laid-Open No. 62-31964, a cleaning chamber is provided in the path of the carriage transport line, and the cleaning water is supplied to the coating carriage carried into the cleaning chamber under high pressure. There has been proposed a cleaning device that sprays the paint on the surface to remove the paint adhering to the surface.

(Problems to be solved by the invention) However, the cleaning device as described above is provided with an upper nozzle group, a lower nozzle group and a side nozzle group for spraying the cleaning liquid onto the upper surface, the lower surface and the side surfaces of the coating carriage carried into the cleaning chamber. And the like, and each of the plurality of nozzle groups is driven by a separate drive device so that the upper surface, the front-rear surface, and the left and right side surfaces of the coating carriage are cleaned. Therefore, there is an inconvenience that the cost of the equipment of the cleaning device increases.

For this reason, for example, an articulated robot equipped with a nozzle for injecting washing water is arranged at a predetermined position facing the carriage transport line, and the robot is operated while injecting the washing water from the nozzle. It is conceivable to remove the paint adhering to the top surface, front and rear surface and left and right side surfaces of the coating dolly. Although the cleaning water is properly sprayed, the cleaning water may not be properly sprayed to the other side surface that does not face the robot. For this reason, robots equipped with nozzles for injecting cleaning water are respectively arranged at two positions sandwiching the carriage transport line so that the paint adhered to the upper surface, front and rear surfaces and left and right side surfaces of the coating carriage can be reliably removed. However, if two robots having nozzles for injecting cleaning water are arranged in this way, there is a problem in that the cost of equipment for the cleaning device increases.

Further, for example, Japanese Utility Model Laid-Open No. 62-88581 discloses work rotating means for selectively rotating a work in order to improve workability with respect to a work that is hung and conveyed by a hanger conveyor. The work rotating means is relatively simple and is composed of a work plate and a work shaft, and it is difficult to rotate a heavy object such as a painting cart.

In view of such a point, the present invention aims to provide a cleaning apparatus for a coating truck, which is capable of efficiently and reliably removing the paint adhering to the coating truck while reducing the equipment cost. And

(Means for Solving Problems) In order to achieve the above-mentioned object, a cleaning apparatus for a coating vehicle according to the present invention conveys a coating vehicle on which an object to be coated is placed along a predetermined path to perform coating. While carrying in the washing booth where the dolly is washed through the carry-in port provided in it,
The trolley transport line that is carried out from the inside of the washing booth through the unloading port provided in the washing booth and the position of the coating trolley that is placed at a position facing one side of the trolley transport line in the washing booth and that is carried into the washing booth by the trolley transport line A robot provided with a fluid ejecting means for performing cleaning by spraying a high-pressure fluid on the coating carriage, a carriage reversing means having a turntable provided by dividing the carriage transfer line in the cleaning booth, and a turntable The turntable reversing means supports the painting carriage carried into the cleaning booth through the carry-in port by the turntable and causes the painting carriage to reverse its direction with respect to the robot. Before and after reversing the direction of the coating carriage supported by the table, cleaning by the fluid injection means In addition, the reverse running preventive means allows the coating cart carried into the cleaning booth by the carriage transport line to move to the turntable, but in the opposite direction to the movement to the turntable. Movement is regulated and configured.

(Operation) In the cleaning apparatus for a coating carriage according to the present invention configured as described above, when the coating carriage conveyed by the carriage conveying line reaches a position facing the robot in the cleaning booth, the robot is equipped with the robot. The high-pressure fluid is sprayed onto the painting carriage by the fluid ejecting means, thereby removing the paint adhering to one side of the painting carriage facing the robot, and further, the upper surface and the front and rear surfaces. Cleaning is done. After that, the turntable is rotated to reverse the direction of the painting carriage with respect to the robot, and the other side surface of the painting carriage faces the robot. In such a state, the fluid ejecting means provided in the robot sprays the high-pressure fluid onto the other side surface of the coating carriage to remove the paint adhering thereto. Then, when the turntable is rotated, the reverse running preventing means prevents the coating cart from jumping out of the turntable.

By doing so, it is possible to efficiently and surely clean the side surfaces, the upper surface, the front and rear surfaces, etc. of the coating carriage while reducing the cost of the equipment of the cleaning device.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows the entire construction of an example of a cleaning apparatus for a coating cart according to the present invention. The coating truck cleaning apparatus shown in FIG. 1 includes a cleaning booth 14 surrounded by a partition wall 12.
In order to convey the coating carriage 2 in which the vehicle body, which is the object to be coated, is placed, a carriage transport which forms a predetermined circulation transport route (only a part of which is shown in FIG. 1) is transported. The robot 8 is provided at a position facing the line 4 and the carriage transport line 4, and is provided with a fluid ejecting unit that sprays a high-pressure fluid onto the coating carriage 2, and a portion of the carriage transport line 4 that is close to the robot 8, and is provided there. A turntable 1 for reversing the direction of the painting cart 2 carried into the robot 8 with respect to the robot 8.
It is configured with 0 and the like. The partition wall 12 is formed with a carry-in entrance 12a and a carry-out exit 12b through which the coating carriage 2 carried in the direction indicated by the arrow R by the carriage carrying line 4 passes, and at the carry-in entrance 12a and the carry-out exit 12b, respectively. Is provided with a shutter 16 that closes the cleaning booth 14 when the coating vehicle 2 is loaded into the cleaning booth 14 and releases the cleaning booth 14 when the coating vehicle 2 is unloaded from the cleaning booth 14.

As shown in FIGS. 2 and 3, the coating cart 2 includes a vertical member 2a extending in a direction along the carriage transport line 4 and lateral members 2b, 2c and 2d extending in a direction orthogonal to the vertical member 2a.
A rectangular frame portion formed by the above, a leg portion 2e fixed to four corners on the lower surface side of the frame portion, a traveling roller 2f fixed to the lower end portion of the leg portion 2e, and the like. Also,
As shown in FIG. 4 showing a cross section taken along the line IV-IV in FIG. 2, each of the pair of front and rear lateral members 2d forming the frame portion of the coating carriage 2 is bent along the lateral member 2d. The other ends of a pair of front and rear brackets 24 having guide rollers 22 attached to one end thereof are fixed.
In each of the pair of brackets 24, a through hole 24a is formed along the up-down direction of the coating carriage 2 in the central portion of the portion extending along the width direction of the coating carriage 2. Further, an engaging arm 29 is fixed to the front surface of the lateral member 2c of the coating carriage 2 and extends along the carriage transport line 4 and has its tip bent downward.

The carriage transport line 4 is erected on the base 25 and a pair of left and right running rails 26 laid on the base 25 and engaged with the running rollers 2f of the coating carriage 2 and a pair of running rails 26. A plurality of support posts 27 and a guide rail 28, which is supported by the support posts 27 at a predetermined distance from the upper surface of the base 25 and has a U-shaped cross section with its opening facing downward, are provided. And painting trolley 2
The traveling roller 2f is engaged with the pair of traveling rails 26 in a state in which the guide roller 22 attached to the bracket 24 is engaged with the guide rail 28, whereby the width of the carriage transport line 4 is increased. Misalignment in the direction is avoided.

A pair of left and right carrier rails 32 extending in parallel with the traveling rails 26 are laid in the middle of the pair of traveling rails 26 in the carriage transport line 4. Carrier rail 32
A pair of front and rear rollers 34 are mounted on each of the above, and a plurality of carriers 36 that move along the carrier rail 32 are arranged. In the plurality of carriers 36, the two that are connected by the rod 40 and the rod 4
Two connected by 1 (in FIG. 2 and FIG. 3, only one of the carriers 36 connected by the rod 41 is shown by a solid line) form a pair. In the example, it is assumed that four carriers 36 are involved in transporting one coating cart 2.

Then, among the plurality of carriers 36, the brackets 24 attached to the respective lateral members 2d of the coating carriage 2
The engaging recesses 36a are formed in the two immediately below the bracket 24 at positions facing the through holes 24a formed in the bracket 24. The bracket 24 and the carrier 36 are formed in the through holes 24a formed respectively. The pins 44 are inserted into the engaging recesses 36a to be connected.

On the other hand, a column 50 is erected on the floor of the cleaning booth 14, and a sprocket 52 having the column as a rotation center axis is fixed to the column 50. And sprocket 5
On the upper surface of 2, a turntable 10 is arranged, the upper surface of which is flush with the upper surface of a base 25 forming a part of the carriage transport line 4. And the trolley carrier line 4
Are divided into right and left by disposing such a turntable 10. Further, rollers 56 are attached to the lower surface of the sprocket 52 at four positions with an angular interval of 90 ° from each other via brackets 54, and the rollers 56 mount the support columns 50 on the floor surface of the cleaning booth 14. Rail 58 arranged in a circle as the center
It is supposed to roll over. A chain 60 is meshed with the sprocket 52, and the chain 60 is meshed with a sprocket 66 fixed to the output shaft of a speed reducer 64 that increases the output of a motor 62 arranged on the floor of the cleaning booth 14. . In addition, the chain 60,
A tension pulley 68 for adjusting the tension is engaged with each other.

On the upper surface of the turntable 10, a pair of left and right traveling rails 26 and a pair of left and right carrier rails 32 that form a part of the carriage transportation line 4 are separated into left and right traveling rails 26 in the carriage transportation line 4, respectively. The guide rail 28 is laid at a position facing the carrier rail 32, and similarly, the guide rail 28 is also supported by a plurality of support posts 27 arranged on the upper surface of the turntable 10.
Then, the turntable 1 in the carriage transport line 4
The turntable 10 is provided at a position downstream of 0.
A chain 38 is arranged to carry out the coating cart 2 loaded above from the turntable 10. A pusher dog 39 is attached to the chain 38,
The pusher dog 39 is adapted to engage with the tip end portion of the engaging arm 29 fixed to the lateral member 2c of the coating cart 2.

At a predetermined position on the upper surface of the turntable 10, a reverse running prevention device 70 for restricting the traveling direction of the coating cart 2 on the turntable 10 is arranged as described later. The reverse running prevention device 70 includes a rod 70a standing on the upper surface of the turntable 10, a flat plate 70b attached to the upper surface of the rod 70a, a pair of brackets 70c fixed to the upper surface of the flat plate 70b, and a pair of brackets. It is provided with a plate member 70d sandwiched by 70c and having a projection portion whose lower end portion abuts on the inclined surface portion and the upper surface portion of the flat plate 70b, and the plate member 70d has a shaft inserted in the upper end portion of the bracket 70c. It is swingably supported as a support shaft.

The robot 8 arranged at a position facing the carriage transport line 4
As shown in FIG. 5, the base 78, the main body 80 that operates in a direction approaching and separating from the carriage transport line 4, and the body 80 which is attached to the upper end of the main body 80 in a direction orthogonal to the carriage transport line 4. It has an extending arm 82 and the like. A nozzle 84 is attached to the tip of the arm 82,
The nozzle 84 is connected to the water flow pipe 88 and the air pipe 90 via the switching valve 86. The water flow pipe 88 and the air pipe 90 are connected to a pump (not shown), and water or air is jetted from the nozzle 84 at high pressure in accordance with the operation of the switching valve 86.

When the coating carriage 2 is cleaned under the above-described structure, first, the coating carriage 2 is conveyed by the carriage conveyance line 4 in the direction indicated by the arrow R in FIGS. 2 and 3. Then, the coating cart 2 is carried onto the turntable 10. At this time, the plate member 70d of the reverse running prevention device 70 arranged on the upper surface of the turntable 10 is
When the brackets 24 attached to the pair of front and rear lateral members 2d of the coating carriage 2 are engaged with the inclined surface portion, the lower end portion of the protrusion is centered on the shaft inserted into the upper end portion of the bracket 70c, and the lower end portion of the protrusion is flat plate 70b. Is rotated in a direction away from the upper surface of the paint truck 2 to allow the painting carriage 2 to move in the direction indicated by the arrow R. After that, paint truck 2
However, when it reaches the position on the turntable 10 as shown by the alternate long and short dash line, it is located on the rear side of the inclined surface portion of the plate member 70d of the reverse running prevention device 70 and the pair of front and rear lateral members 2d of the coating vehicle 2. The engagement with the bracket 24 attached to the object is released, and the plate member 70d
Is located at a position where the protrusion contacts the upper surface of the flat plate 70b, and in such a state, the movement of the coating carriage 2 on the turntable 10 in the direction opposite to the direction indicated by the arrow R is prohibited. .

When the coating cart 2 is loaded onto the turntable 10 in this manner, the main body 80 of the robot 8 is operated and attached to the arm 82 of the robot 8 as shown by the alternate long and short dash line in FIG. Nozzle 8
The water that is pressure-fed through the water flow pipe 88 or the air that is pressure-fed through the air pipe 90 from
It is selectively switched according to the operation of 6 and is sprayed on the surface of the coating carriage 2 at a high pressure. Thereby, the painting trolley 2
One side facing the robot 8 in
The paint adhering to the upper surface and the front and back surfaces is removed.

In this way, after the paint adhering to one side surface, the upper surface, and the front and rear surfaces of the coating cart 2 facing the robot 8 is removed, the operation of the robot 8 is stopped and the chain 38 is operated. To be And
The pusher dog 39 attached to the chain 38
By engaging with the tip end of the engaging arm 29 of the coating carriage 2 positioned on the turntable 10, the coating carriage 2 and the carrier 36 accompanying the coating carriage 2 are respectively
It moves along the traveling rail 26 and the carrier rail 32. In this way, the operation of the chain 38 is stopped and the running rails of the coating carriage 2 are stopped in a state where the coating carriage 2 and the four carriers 36 that contribute to the conveyance of the coating carriage 2 are all carried out from the turntable 10. The movement along 26 and the movement of the carrier 36 along the carrier rail 32 are stopped.

In such a state, the through hole 24 of the bracket 24 attached to each of the pair of lateral members 2d of the coating carriage 2
The pin 44 inserted into the a and the engagement recess 36a of the carrier 36 is pulled out by an operator or the like, and the connection between the coating carriage 2 and the carrier 36 is released. Then, when the connection between the painting cart 2 and the carrier 36 is released, the chain 3
8 is operated in the direction opposite to the case where the painting carriage 2 is carried out from the turntable 10, and the painting carriage 2 is moved in the direction opposite to the direction indicated by the arrow R and placed on the turntable 10. Is brought in. In this way, after the coating carriage 2 is loaded onto the turntable 10 again, as shown by the alternate long and short dash line in FIGS. 2 and 3, the motor 62 disposed below the turntable 10 is moved. The turntable 10 is actuated and, together with the coating carriage 2, is rotated 180 ° in the direction indicated by the arrow X in FIG.
It can be rotated. At this time, the bracket 24 attached to the rearward one of the pair of front and rear lateral members 2d of the coating cart 2 is engaged with the plate member 70d of the reverse running prevention device 70 disposed on the upper surface of the turntable 10. Therefore, the situation where the paint cart 2 jumps out of the turntable 10 due to the rotation of the turntable 10 is avoided.

In this way, by rotating the turntable 10 by 180 °, the direction of the coating cart 2 on the turntable 10 with respect to the robot 8 is reversed as shown by the chain double-dashed line in FIG. In such a state, the robot 8 is activated again,
From the nozzle 84 attached to the arm 82 of the robot 8, the water pressure-fed through the water flow pipe 88 or the air pressure-fed through the air pipe 90 is selectively switched according to the operation of the switching valve 86, so that the coating carriage 2 of the coating carriage 2 is operated. Sprayed on the surface with high pressure. Thereby, the paint adhering to the other side surface of the coating cart 2 is removed.

Then, after the removal of the paint adhering to the coating carriage 2 is completed as described above, the operation of the robot 8 is stopped and the turntable 10 is moved along with the coating carriage 2 in FIG. Further in the direction indicated by
It can be rotated 180 °. After that, the chain 38 is operated, and the coating carriage 2 is carried out from the turntable 10 with the tip end of the engaging arm 29 thereof being engaged with the pusher dog 39 of the chain 38, and the coating carriage 2 and the carrier. The carrier 36 stopped on the rail 32 and the through hole 24 formed in the bracket 24 attached to each of the pair of lateral members 2d of the coating cart 2.
The pin 44 is inserted into the “a” and the engaging recess 36 a formed in the carrier 36 to reconnect the pin 44. Then, the carrier 36 is moved along the carrier rail 32 by a driving means (not shown), and thus the washed coating cart 2 is transported by the cart transport line 4 and is unloaded from the cleaning booth 14.

(Effects of the Invention) As is clear from the above description, according to the coating truck cleaning apparatus of the present invention, the coating truck carried into the turntable in the cleaning booth is sprayed with a high-pressure fluid to remove the paint attached thereto. With respect to the fluid ejecting means provided in the robot for cleaning to be removed, the coating cart is prevented from jumping out of the turntable, and the outer surface is switched by rotation of the turntable. When only a specific part of the outer surface of the coating cart is made to face the fluid ejecting means, the part which will not be cleaned will be sufficiently cleaned. Therefore, the paint adhering to the coating cart can be efficiently and surely removed, and the cost of the equipment can be reduced by using only one robot for cleaning.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing the overall construction of an example of a coating trolley cleaning apparatus according to the present invention, and FIGS. 2 and 3 are trolley transport lines and trolley reversing means in the example shown in FIG. FIG. 4 is a plan view and a side view including a partially broken surface, which is used for the explanation, FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2, and FIG. 9A and 9B are diagrams provided for explaining the operation. In the figure, 2 is a coating carriage, 4 is a carriage transport line, 8 is a robot, 10 is a turntable, 14 is a cleaning booth, 36 is a carrier, 62 is a motor, 70 is a reverse running prevention device, and 84 is a nozzle.

Claims (1)

[Scope of utility model registration request] 1. A coating trolley on which an object to be coated is placed is conveyed along a predetermined path, and is carried into a cleaning booth where the coating trolley is cleaned through an entrance provided in the cleaning booth. A carriage transfer line that is carried out from the inside of the cleaning booth through a carry-out port provided in the cleaning booth, and a position that faces one side of the carriage transfer line in the cleaning booth, and the cleaning is performed by the carriage transfer line. A robot equipped with a fluid ejecting means for cleaning the coating carriage carried into the booth by spraying a high-pressure fluid onto the coating carriage, and the carriage transport line provided in the cleaning booth in a divided manner. A support for supporting the coating carriage carried into the cleaning booth through the carry-in port and causing the direction of the coating carriage to be reversed with respect to the robot. A carriage reversing means having a table, wherein the coating carriage supported by the turntable is washed by the fluid ejecting means before and after reversing the direction, and the carriage is provided on the turntable. A reverse running preventing means for restricting movement in a direction opposite to the movement on the turntable, though it enables movement of the coating carriage carried into the washing booth on the line by the line. A coating trolley cleaning device equipped.