JP2668649B2 - Automotive lower coating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for painting the lower part of a vehicle as a pre-process for inspection and maintenance of the vehicle.

[0002]

2. Description of the Related Art In a conventional automobile undercoating technique,
A vehicle to be painted is lifted by a hydraulic jack or the like, and a worker enters under the vehicle to paint the lower portion of the vehicle using a spray gun for painting. In this case, the painted surface is overhead for the worker, and the work is facing upward, which requires very physical and energy. In addition, there is a risk that a vehicle lifted by a hydraulic jack or the like may fall due to a malfunction or an erroneous operation of the hydraulic jack or the like, causing a serious accident.

[0003] From the above, painting the lower part of an automobile is very time-consuming, labor-intensive and dangerous, so efficient, labor-saving and safe painting techniques are required. It was requested.

[0004]

SUMMARY OF THE INVENTION The problem to be solved by the present invention in view of the above is to carry out the lower part coating of an automobile without manpower, and to efficiently, labor-saving and safely paint the lower part of the automobile. It is intended to provide a lower coating device capable of performing the following.

[0005]

Means for Solving the Problems In view of the above, the means taken by the present invention to solve the problem is to provide a lower part coating means for an automobile, which sprays the paint to the lower part of the automobile stopped at a predetermined position for coating. A central painting arm having a lower painting machine composed of a central bogie and side bogies reciprocating in the vehicle length direction, and a required number of automatic paint spraying spray guns mounted on the bogie and moving in a direction perpendicular to the vehicle length direction center line. , Both side painting arms, sensor poles that move across the vehicles provided on both side trolleys, traveling means that reciprocates the lower painting machine in the vehicle length direction, and moves the central painting arm and side painting arm respectively A painting arm moving means, a tire sensing means for traveling while detecting and avoiding a tire which hinders the traveling of the side painting arm, and a center paint for spraying paint in response to the tire sensing means. Paint spray automatic spray gun selection means for selecting an automatic spray gun for the arm; cavity sensing means for sensing a paint unnecessary cavity in the lower part of the vehicle; and paint spray for spraying paint in response to the cavity sensing means. The purpose was made possible by performing the lower coating with a lower coating device having a control means.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to specific embodiments. FIG. 1 is an explanatory view showing the overall structure of an automatic lower coating apparatus as one embodiment of the apparatus of the present invention. A wire 1 for guiding a reciprocating running of a lower coating machine moving on a rail composed of a central bogie C, a side bogie SL, and a side bogie SR is stretched over a predetermined distance in a coating booth into which a vehicle M to be coated with the lower part enters. There is. At the required position on the front and rear of the side carriage truck, the vehicle M to be painted
Limit switches 2a and 2b, which determine the range in which the bogies travel according to the vehicle length L, are installed so as to be movable within the allowable range. Accordingly, the limit switch 2a is responsible for starting and ending the lower coating machine, and the limit switch 2b performs one reciprocating motion to reverse the direction of the lower coating machine. As a result, the central coating arms Ca and Cb and the side coating arms Sl and Sr mounted on the lower coating machine move in the entire vehicle length L. When the vehicle length L of the automobile M to be coated changes, it suffices to change the positions of the limit switches 2a and 2b according to the vehicle length. The electric cable K, the paint hose Hp, and the air hose Ha that are supplied to the lower coating machine are housed in reels KR, HR, and PR, respectively, and are freely extended according to the running of the lower coating machine.

Next, the configuration of the central truck C will be described.
2 to 4 are explanatory diagrams showing the overall configuration of the central bogie C. Incidentally, the supply wiring to each electric device on the central carriage C, the paint supply pipe to the automatic spray gun, and the air supply pipe are omitted for convenience of explanation. Since the traveling rail 3a of the central bogie C shown in FIG. 1 is provided at a position lower than the floor where the vehicle to be painted is stopped, only the central painting arm portion protrudes from the floor. Two central coating arms C having a required number of automatic spray guns 7a, 7b provided on the central carriage C so as to be capable of reciprocating in directions opposite to each other at right angles to the center line of the traveling direction of the central carriage C.
Various necessary devices are mounted in addition to a and Cb. The drive means for the central coating arms Ca and Cb will be described. At the front and rear predetermined positions on the central carriage C, drive motors 12a and 12b for the central coating arms Ca and Cb are arranged, respectively. A toothed pulley 13 and encoders 17a and 17b are connected to the drive motors 12a and 12b by a motor shaft, and timing belts 14a and 14b are wound around the toothed pulleys 13a and 13b.
The driven side pinions 15a, 15b and the central painting arm Ca,
Since the rack gear 16a provided at a predetermined position of Cb is engaged, the central coating arms Ca and Cb can be repeatedly moved by rotating the drive motors 12a and 12b forward and backward. Further, sensors 10a and 10b are arranged at the tip ends of the central coating arms Ca and Cb on the outward movement direction side, respectively. For this reason, the sensors 10a and 10b detect the tires to which the center painting arms Ca and Cb move forward, and stop the drive motors 12a and 12b of the center painting arms Ca and Cb to stop the movement of the center painting arms Ca and Cb. It can be stopped at a predetermined position. The means for reversing the forward movement direction of the central coating arms Ca and Cb will be described later.

Next, the both-side carriages SL and SR will be described. Note that the side carriages SL and SR are the same for convenience of description, and thus the description of SR will be omitted. 5 to 7 are explanatory views showing the overall configuration of the side bogie SL. Since the traveling rail 3b of the side bogie SL is provided at a position lower than the floor of the stopped automobile as shown in FIG. 1, only the side painting arm S1 protrudes from the floor. The side carriage SL is equipped with a side painting arm Sl having a required number of automatic spray guns 7c provided so as to be capable of reciprocating in a direction perpendicular to the center line of the traveling direction thereof, and various necessary devices. A drive motor 28 for the side painting arm Sl is arranged at a predetermined position of the side carriage SL. The drive motor 28 includes a pinion 15c.
Is directly connected and is engaged with the rack gear 16b provided at a predetermined position of the side painting arm Sl, so that the side painting arm Sl can be repeatedly moved by rotating the drive motor 28. Also, the side carriage S
L is provided with a limit switch 38 at a predetermined position, and dogs 30a and 30b are provided at required positions of the side painting arm Sl so as to come into contact with the limit switch 38, thereby stopping the movement of the side painting arm Sl. , Can be reversed. Further, the start of spraying of the lower coating machine, the reversal of running, and the end of spraying of spraying are performed by the dogs 30c and 30d contacting the limit switches 2a and 2b. The detailed operation will be described later.

The reciprocating operation of the lower coating machine will now be described. The paint spraying will be described later. At the origin, as shown in FIG. 1, the side painting arms Sl and Sr ride on the side painting arm pedestal 24 on the central carriage C. (Hereinafter, this state is referred to as the most extended position of the side painting arm, and the opposite state is referred to as the most contracted position.) The starter signal from the central control panel Cu causes the lower painting machine to start traveling forward. When the sensor 11a is blocked by the tire, the lower coating machine stops traveling and the central coating arm Ca starts to move forward. When the sensor 10a comes close to the tire at a predetermined distance, the central coating arm Ca stops and the lower coating machine starts running. When the sensor 11b is blocked by the tire, the lower coating machine stops running and the central coating arm C
b starts the outward movement and at the same time the side painting arm S
1 and Sr start moving to the most contracted position. When the sensor 10b approaches a predetermined distance from the tire, the center painting arm Cb stops, and the side painting arms S1 and Sr stop moving when the dog 30b contacts the limit switch 38. After the lower coating machine starts running and the sensor 11a passes through the tire, the lower coating machine stops and the central coating arm Ca starts moving in the return path. The origin of the central coating arm Ca is measured by the encoder 17a and stopped. The lower coater starts running. After the sensor 11b has passed the tire, the lower coating machine is stopped and the central coating arm Cb starts moving in the return path. The origin of the central coating arm Cb is measured by the encoder 17b and stopped. The lower coater starts running. Sensor 11c
After passing through the tire, the lower coating machine stops, and the side coating arms Sl and Sr start moving to the most extended position. The dog 30a comes into contact with the limit switch 38 and stops moving. The above operation is repeated when the lower coater starts running and reaches the tire position again. When the dog 30c abuts on the limit switch 2b and then the dog 30d abuts, the lower painting machine stops and the side painting arms Sl, Sr
Starts moving to the retracted position. The dog 30b comes into contact with the limit switch 38 to stop the movement of the side coating arms Sl and Sr. The lower painting machine starts returning movement. still,
When returning, the side painting arms Sl and Sr are in the retracted position,
In addition, since the central coating arms Ca and Cb travel at the origin position, the sensors 11a, 11b and 11 that sense the tires are used.
c is in a non-sensing state. After the dog 30d is brought into contact with the limit switch 2a, the dog 30c is brought into contact therewith to stop the lower coating machine and complete the entire process.

Next, the paint spraying operation will be described. The car to be painted on the lower part has a hollow part which does not need to be sprayed with paint depending on the car model. In particular, as shown in FIG. 8, in the case of a concrete mixer truck, there are many cavities 40 between the drum and the cab that do not require spraying of paint. For this reason, a cavity sensing means and a means for controlling the spray of paint in response thereto are required. Therefore, the cavity sensing means and the paint injection control means will be described with reference to FIG. Sensor poles 34 are arranged on both side carriages, and the ceiling is connected in a gate shape by a sensor mounting member. The required number of transmissive sensors 31a to 31f and 32a to 32f are arranged on the sensor mounting member. The height of the pole is at least 4 m or more so that it can run across a large automobile.
On the other hand, one sensor is provided for each automatic spray gun on both side coating arms. Next, the arrangement of the sensors will be described. The side coating arm S when spraying each automatic spray gun of the both side coating arms is performed.
The positions of l and Sr are in the state of the most extended position as shown in FIG. Sensors 31a to 31f of both side coating arms are alternately arranged with a light projecting portion and a light receiving portion. Also sensor 32
The same applies to a to 32f. Therefore, the sensor arrangement of the sensor pole 34 is opposite to the arrangement of the both side coating arms. This is because the sensors are arranged close to each other, so that the sensors in the vicinity do not interfere with each other. Therefore, in response to the sensor, the automatic spray guns 7c and 7d on both side coating arms
The paint injection / stop control means will be described with reference to FIGS. Sensors 31a to 31f, 32a to 32f, respectively
When is blocked, an automatic spray gun for that sensor will spray paint. Therefore, when the both side coating arms move in the X region in the most extended state, if they approach the cavity 40 that does not require paint spraying, the sensor is transmitted and the spraying of paint by the automatic spray gun is stopped. Therefore, useless paint spraying is eliminated. Next, the central coating arm Ca, Cb
The spraying and stopping of the paint by the automatic spray guns 7a and 7b with respect to the moving operation will be described with reference to FIG. As described above, the central coating arms Ca, Cb sensors 10a,
The movement is stopped at 10b. At this time, the encoder 1 connected to the motors 12a and 12b for driving the central painting arm is operated.
The moving distances of the central coating arms Ca and Cb are measured by 7a and 17b, and the automatic spray gun on the Y region which is out of the state of the origin position is selected and the paint is sprayed. However,
When the lower coating machine is stopped and the central coating arms Ca, C
b. Paint is not sprayed while both side coating arms are moving.

Here, the timings when the paint injection starts, the traveling reversal, and the paint injection end will be described with reference to FIGS. 1 and 6. In FIG. 6, the contact position between the dog 30c and the limit switches 2a and 2b is located at a position corresponding to the paint ejection position of the automatic spray gun 7b of the central painting arm Cb, and the contact position between the dog 30d and the limit switches 2a and 2b. Is an automatic spray gun 7c for the side coating arms Sl and Sr,
7d. As a result, the automatic spray guns 7c and 7d of the side coating arms Sl and Sr are in a state in which the paint spraying can be started when the dog 30d is brought into contact with the limit switch 2a. When the running is reversed, the dog 30d is brought into contact with the limit switch 2b, and the automatic spray gun 7 for the side coating arms Sl and Sr.
Injections c and 7d are stopped and the return operation starts. And
When the dog 30c comes into contact with the limit switch 2b,
All automatic spray guns of the central painting arm Cb start spraying. When the dog 30c comes into contact with the limit switch 2a, the injection of paint is completed. The above operation completes the entire paint spraying process. Therefore, the paint spraying area is set as shown in FIG.
Will be described with reference to. In the area X, both side painting arms are in charge of the lower side painting in the forward traveling. In the area Y, the central coating arm is in charge when the vehicle travels forward, and the lower coating is performed. The area Z is in charge of the central coating arm Cb at the time of the return trip, and the lower coating is performed to complete the entire process. Therefore, by reciprocating the lower coating machine once, the entire lower region of the automobile to be coated is coated.

[0012]

As described above, according to the present invention, since the lower part of the vehicle is automatically painted, the lower part can be painted without the operator entering the lower part of the vehicle.
For this reason, the work time conventionally required for lower coating can be greatly reduced, and a safe painting operation can be provided.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an overall configuration of an automatic lower coating apparatus as one embodiment.

FIG. 2 is a plan view showing an overall configuration of a central truck C.

FIG. 3 is a side view showing the overall configuration of the central bogie C.

FIG. 4 is a front view showing the overall configuration of the central bogie C.

FIG. 5 is a front view showing the overall configuration of the side bogie SL.

FIG. 6 is a side view showing the overall configuration of the side bogie SL.

FIG. 7 is a plan view showing the overall configuration of the side bogie SL.

FIG. 8 is a schematic view showing a hollow portion of a concrete mixer truck.

FIG. 9 is an explanatory view showing the assigned area of each painting arm.

FIG. 10 is a front view showing the overall configuration of one embodiment.

[Explanation of symbols]

C Central trolley SL Side trolley SR Side trolley M Vehicle to be painted lower part L Commander K Electric cable Hp Paint hose Ha Air hose KR Cable reel PR Paint hose reel HR Air hose reel Sl Side painting arm Sr Side painting arm Ca Central painting arm Cb Central coating arm Cu Central control panel 1 Wire 2a Limit switch 2b Limit switch 3a Side bogie traveling rail 3b Central bogie traveling rail 4 Lower painting machine drive motor 5 Bearing 6 Pulley 7a Central painting arm Ca automatic spray gun 7b Central painting Arm Cb Automatic Spray Gun 7c Side Painting Arm Sl Automatic Spray Gun 7d Side Painting Arm Sr Automatic Spray Gun 8 Driving Shaft 9 Follower Shaft 10a Central Painting Arm Ca Sensor 10b Medium Painting arm Cb sensor 11a Tire sensing sensor 11b Tire sensing sensor 11c Tire sensing sensor 12a Motor for driving central painting arm Ca 12b Motor for driving central painting arm Cb 13a Pulley with teeth for driving central painting arm Ca 13b Teeth for driving central painting arm Cb Pulley 14a Timing belt for driving the central painting arm Ca 14b Timing belt for driving the central painting arm Cb 15a Pinion for driving the central painting arm Ca 15b Pinion 15c for driving the central painting arm Cb 15c Pinion 16a for driving the side painting arm Sl 16a Central painting arm Ca driving Rack gear 16b Rack gear 16c for driving the center painting arm Cb Rack gear 17a for driving the side painting arm Sl 17a Encoder 17b Encoder 18 Central painting arm moving rail 19a- Central coating arm Ca automatic spray gun needle control valve 20a-d Central coating arm Ca automatic spray gun injection control valve 21a-e Central coating arm Cb automatic spray gun needle control valve 22a-e Central coating arm Cb automatic spray gun injection control valve 23 Central trolley guide roller mounting plate 24 Both side coating arm receiving cradle 25 Central coating arm guide roller 26 Central trolley guide roller 27a Central coating arm Ca rack gear pressing roller 27b Central coating arm Cb rack gear pressing roller 27c Side coating arm Sl Rack gear pressing roller 28 Side Painting arm drive motor 29 Side painting arm guide roller 30a Side painting arm Sl most extended dog 30b Side painting arm Sl most contracted dog 30c Central painting arm Cb injection control dog 30 d Both side painting arm injection control dog 31a-f Sensor for side painting arm Sl 32a-f Sensor for side painting arm Sr 33 Side trolley wheel 34 Sensor pole 35 Side trolley guide roller 36 Side painting arm travel rail 37 Side painting arm receiving roller 38 Limit switch 39 Side bogie guide roller mounting plate 40 Automobile cavity 41a-f Side painting arm automatic spray gun needle control valve 42a-f Side painting arm automatic spray gun injection control valve

Claims (4)

(57) [Claims] 1. A lower coating machine comprising a central truck and a side truck that reciprocate in the vehicle length direction in a lower coating means of an automobile that sprays paint to the lower portion of the automobile stopped at a predetermined position to apply the coating to the truck. A central painting arm having a required number of automatic paint spraying spray guns that move in a direction perpendicular to the vehicle length direction center line, both side painting arms, and a sensor pole that moves across vehicles installed on both side bogies Traveling means for reciprocating the lower painting machine in the vehicle length direction, painting arm moving means for moving the central painting arm and side painting arm, respectively, and traveling while avoiding the tires that hinder the traveling of the side painting arm. Tire sensing means, and automatic spray gun selecting means for selecting an automatic spray gun of a central painting arm to be sprayed in response to the tire sensing means. A lower part coating device for an automobile, comprising: a cavity sensing means for sensing a cavity in the lower portion of the vehicle which does not require painting; and a paint spraying control means for spraying paint in response to the cavity sensing means. 2. The tire detecting means according to claim 1, wherein the tire detecting means is a sensor provided at a predetermined position on the forward end of each of the two coating arms mounted on the central carriage in the forward movement direction and a sensor provided at a predetermined position on the side carriage. In response to the movement of the central coating arm, stopping and moving means, and a side coating arm moving and stopping means for moving and stopping the side coating arm in response to a sensor provided at a predetermined position of the side carriage. A lower coating device for an automobile, wherein the lower coating device is provided. 3. The paint spray automatic spray gun selection means according to claim 1, in response to the central coating arm moving and stopping means according to claim 2, the moving distance of the coating arm is measured by an encoder, and the paint is applied according to the moving distance. A bottom coating device for automobiles, which is characterized by selecting an automatic spray gun for spraying. 4. The cavity detecting means according to claim 1, wherein the light emitting portions and the light receiving portions of the required number of transmissive sensors mounted on the side coating arms are alternately provided so as not to interfere with adjacent sensors. A lower coating apparatus for an automobile, wherein the light projecting section, the light receiving section facing the light receiving section, and the light projecting section are provided at required positions of the sensor pole.