JPH0448684B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a synchronization device that moves an automatic working machine that works on a car being conveyed on a production line in synchronization with the car. be.

(Prior Art) In automobile production lines, it is common practice to sequentially perform various operations on automobiles while transporting the automobiles on a conveyor. In such an automobile production line, in order to use an automatic working machine to work on a car, the automatic working machine must be set at a predetermined position relative to the car on the conveyor, and must be placed at a predetermined position relative to the car being transferred by the conveyor. It is necessary to move them in synchronization. Conventionally, in order to move an automatic working machine in synchronization with a car, the moving means of the automatic working machine has been electrically synchronized with the conveyor drive means, as shown in Japanese Utility Model Application Publication No. 55-127098, for example. It is proposed to drive However, in this synchronization method, the actual vehicle transfer speed and automatic work machine movement speed are not detected, so the synchronization between the two is only rough, and it is not suitable for automatic work machines that perform precise work. Difficult to apply.

Furthermore, it is inevitable that errors will occur in the placement position of cars on the conveyor in the left-right direction (direction perpendicular to the transport direction), but the synchronization device shown in the above publication is It is not possible to deal with the occurrence of errors, and the vehicle and the automatic working machine end up being moved synchronously with the left and right positional deviation between the two.

(Object of the Invention) The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to accurately set an automatic working machine at a predetermined left and right position with respect to a car on a conveyor, and to synchronize it accurately with the car. The object of the present invention is to provide a synchronization device for an automatic working machine that can be moved with the same speed.

(Structure of the Invention) The synchronization device for an automatic working machine in conveyor transfer according to the present invention includes a detection means for detecting the position and moving speed of an automobile on the conveyor, and a position adjustment of the automatic working machine based on the detection result of the detection means. and a working machine operating means for synchronously moving the work equipment, and the detecting means includes a trolley mounted movably on a rail laid parallel to the conveyor and positioned between the left and right wheels of the automobile, and A pair of connecting rods are pushed out and fixed between the left and right wheels of the car to connect the bogie and the car, and the difference in the amount of extension of these connecting rods from the bogie reference part is detected, and the detected amount is calculated as the left and right position of the car. It is comprised of a left/right position detection means that inputs a signal to the work operating means, and a synchronization signal output means that inputs the moving speed of a trolley connected to an automobile as a synchronization signal to the work machine operation means from time to time.

(Effect of the invention) By detecting the left and right position of the car on the conveyor using the connecting rod and the left and right position detection means as described above, and adjusting the left and right position of the automatic working machine according to the detection result, even if the car is in the specified position. Even if the automatic working machine is placed offset from the vehicle in the left-right direction, the automatic working machine can be set at a predetermined position relative to the vehicle. In addition, the moving speed of the trolley connected to the car via the connecting rod (i.e., the moving speed of the car) is actually detected, and the automatic working machine is moved synchronously based on the moving speed. Move in precise synchronization with the car. Therefore, according to the synchronization device of the present invention, it is possible to carry out precise work on a car being transferred by a conveyor.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are an elevation view and a side view showing a synchronization device for an automatic working machine in conveyor transfer according to an embodiment of the present invention. The automobiles 1 assembled on the production line are placed on conveyors 2, 2' and are transported in the direction of arrow A in FIG. 2 to undergo various operations in sequence. Above the conveyors 2 and 2',
A pair of rails 3, 3' extending in parallel along the conveyors 2, 2' are constructed, and these rails 3,
A working machine operating means 4 is mounted on a rack 3'. This working machine operating means 4 supports a window washer liquid injection device 5 as an automatic working machine.

The trolley 6 of the work machine operating means 4 is mounted on the rails 3, 3'.
A pinion (not shown) is mounted on which wheels 7 are mounted so that it can move along the rails 3, 3', and meshes with a rack 8 extending on the rails 3, 3'.
The vehicle travels along the rails 3, 3' by being rotationally driven by a back-and-forth motion motor (step motor) 9.
Further, a pair of rails 10, 10' extending in a direction perpendicular to the rails 3, 3' are fixed to this truck 6,
A horizontally movable table 12 is mounted on these rails 10, 10' via two pairs of wheels 11, for example. This table 12 travels along the rails 10, 10' by a left-right movement motor (step motor) 13 mounted on the table 12 rotating some or all of the wheels 11. In addition, this table 12 has a screw rod rotatably driven by a motor fixed to the cart 6 side, which is arranged parallel to the rails 10, 10', and a nut fixed to the table 12 side is attached to this screw rod. It may also be made to move laterally (move in a direction perpendicular to the rails 3, 3') by screwing them together. The washer liquid injection device 5 is supported by the table 12 and includes a pipe 14 extending in the vertical direction, a nozzle part 15 supported at the lower end of the pipe 14, and a hose communicating with the upper end of the pipe 14 to supply the washer liquid. 16, the pipe 14 is vertically moved and rotated according to the type of vehicle 1 by a known pipe vertical moving means and pipe rotating means mounted on the table 12, and the nozzle part 1
5 is fitted to the inlet of the washer fluid tank of the automobile 1.

Inside and below the conveyors 2 and 2', there is a conveyor 2,
A pair of rails 17, 1 centered on the center of 2'
7' are laid, and on these rails 17, 17', for example, two pairs of wheels 18 are used to drive the rails 17, 17'.
A cart 19 movable along 17' is mounted. As shown in detail in the plan view of FIG. 3, between the frames 20 and 20' on both the left and right sides of this truck 19,
A pair of guide rods 21, 21' are fixed to the rails 17, 17' and extend in a direction perpendicular to the rails 17, 17'.
A table 22 is supported movably along lines 1 and 21'. An air motor 23 is fixed at the center of the table 22 with a rotating shaft 23a facing upward, and a pinion 2 is attached to the rotating shaft 23a.
4 is fixed. A pair of connecting rods 2 are provided at the front and rear of the pinion 24 and have racks 25a and 25a' that mesh with the pinion 24, respectively, and are supported movably in a direction perpendicular to the rails 17 and 17'.
5, 25' are arranged. These connecting rods 25,
25' is set to extend from the center of the truck 19 to the left and right by the same length when the table 22 is located at the center of the truck 19. Further, the table 22 is connected to a slider of a potentiometer 26 that is fixed to the frame 20 and serves as a left-right position detection means. The output signal of the potentiometer 26 is input to the drive control circuit 35 of the left-right motor 13.

As shown in FIG. 2, the above-mentioned truck 19 is connected to a chain 29 which is suspended between sprockets 27 and 28 in a direction parallel to the rails 17 and 17' and rotates endlessly. A pulse oscillator 30 is connected to one sprocket 28 and serves as a synchronizing signal output means, which oscillates a number of pulses corresponding to the rotational speed of the sprocket 28. The output pulse of the pulse oscillator 30 is transmitted to the longitudinal motor 9.
The signal is input to the drive control circuit 36 of. The sprocket 28 is connected to a return motor 31, and when the return motor 31 is driven, the chain 29 is moved in the direction of arrow B in FIG.

Hereinafter, the operation and effects of the device having the above configuration will be explained. As will be described later, the chain 29 of the trolley 19 is moved by the return motor 31 and returned from the left to the right in FIG.
It is stopped at a predetermined position on 7' and waits for the automobile 1 to be transferred. At the same time, the work machine operating means 4
The truck 6 is also set at a predetermined position on the rails 3, 3' by driving the longitudinal motor 9, and is on standby.

A vehicle transfer position detection device (not shown) consisting of, for example, a photoelectric device is provided on the side of the conveyor 2, 2', and is placed on the side of the connecting rod 25, 25' of the trolley 19 waiting as described above. Left and right rear wheels 40,4
When the detection device detects that the automobile 1 has been moved to the predetermined position where 0' is located, the air motor 23 is driven by a signal output from the detection device. This air motor 23 has a rotating shaft 23a.
is driven to rotate counterclockwise in FIG.
The connecting rods 25 and 25' with which the connecting rods a and 25'a are engaged extend outwardly to the right and left of the truck 19, respectively. These connecting rods 25, 25' connect the left and right rear wheels 40, 4, respectively.
0' is pressed from the inside and extended until it is fixed between these rear wheels 40, 40', thereby connecting the automobile 1 and the truck 19.

Here, if the car 1 is correctly placed with the center of the car body aligned with the center of the conveyors 2, 2', the connecting rods 25, 25' extend from the center of the truck 19 to the left and right by equal lengths. However, if the vehicle 1 is placed at an incorrect position in the left-right direction and the center of the conveyors 2, 2' and the center of the vehicle body are not aligned, the table 22 moves in the left-right direction relative to the trolley 19, and the connecting rods 25, 2
5' is pressed and fixed between the left and right rear wheels 40, 40'.
In other words, since the connecting rods 25 and 25' always extend from the center of the table 22 to the left and right directions, the automobile 1
The table 22 moves in the left-right direction by the amount of deviation between the center of the vehicle body and the center of the conveyors 2, 2'. The amount of movement of the table 22 is detected by the potentiometer 26 (the amount of movement of the table 22 corresponds to half the difference in the amount of extension of the connecting rods 25 and 25' from the center of the truck 19). ).

The output signal of the potentiometer 26 is input as a vehicle left-right position signal to the drive control circuit 35 of the left-right motor 13 of the work equipment operating means 4, and the left-right motor 13 is rotated in a direction corresponding to the left-right position of the vehicle 1. , the horizontal movement table 1 is rotated by the amount of rotation.
2 is moved and the window washer liquid injection device 5
is set at the correct left-right position with respect to the automobile 1.

On the other hand, as described above, once the connecting rods 25, 25' are pressed and fixed between the left and right rear wheels 40, 40', the trolley 19 continues to move together with the automobile 1.
The moving speed of this truck 19 is of course equal to the transfer speed of the automobile 1, and the rotational speed of the sprocket 28 corresponds to the moving speed of the truck 19, so the number of pulses of the pulse oscillator 30 corresponds to the transfer speed of the automobile 1. It will be compatible. Therefore, when the back-and-forth movement motor 9 of the work equipment operating means 4 is driven with a number of pulses corresponding to the number of pulses oscillated by this pulse oscillator 30, the work operating means 4 moves in exact synchronization with the transport speed of the automobile 1. . Therefore, as mentioned above, the pipe 1 of the window washer liquid injection device 5 is
When the nozzle part 15 is rotated and lowered, the nozzle part 15
The injection device 5 is moved in exact synchronization with the vehicle 1 so that the washing liquid filling operation, which takes a certain amount of time, can be continued.

When the washer fluid injection work is completed, pipe 1
4 is lifted and rotated, and the nozzle part 15 is separated from the washer fluid tank inlet of the automobile 1. The working machine operating means 4 for moving this window washer fluid injector 5 is driven by the back and forth motor 9, and the nozzle part 15 is separated from the washer fluid tank inlet of the automobile 1. 19 is returned to a predetermined standby position by the drive of the return motor 31, and waits for the next automobile 1 to be transferred.

The embodiments applied to a window washer liquid injection device, which is an example of an automatic working machine, have been described above, but the present invention is applicable to any automatic working machine that is moved in synchronization with a car on a conveyor that is continuously transported. It can be applied to

[Brief explanation of the drawing]

Fig. 1 is an elevational view showing one embodiment of the present invention;
The figure is a side view of the above embodiment, and FIG. 3 is a plan view showing a part of the above embodiment in detail. 1...car, 2,2'...conveyor, 4...
Work machine operating means, 5...Window washer liquid injection device (automatic work machine), 9...Back and forth movement motor, 1
3... Left and right motor, 17, 17'... Rail,
19...Dolly, 25, 25'...Connecting rod, 26...
...Potentiometer, 30...Pulse oscillator, 3
5, 36... Drive control circuit, 40, 40'... Rear wheel of the car.

Claims (1)

[Claims] 1 A synchronization device for an automatic working machine that works on a continuously transported vehicle on a conveyor, which includes a detection means for detecting the position and moving speed of the vehicle on the conveyor, and an automatic and a work machine operating means for adjusting the position of the work machine and moving it synchronously, and the detecting means is a trolley mounted movably on a rail laid parallel to the conveyor and positioned between the left and right wheels of the automobile. Then, a pair of connecting rods extend left and right from this truck and are pressed and fixed between the left and right wheels of the car to connect the truck and the car, and the difference in the amount of extension of these connecting rods from the standard part of the truck is detected. lateral position detection means for inputting a detected amount to the working machine operating means as a vehicle lateral position signal; and synchronous signal output means for inputting the moving speed of a truck connected to the vehicle to the working machine operating means from time to time as a synchronous signal. A synchronization device for an automatic working machine in conveyor transfer, characterized by comprising: