JPS63154580A - Carriage device for base board - Google Patents

Abstract

PURPOSE:To ensure the stopping of base board carriage after the proper alignment of printing circuit boards by providing a carriage mechanism actuated with a drive source and to carry the boards, and an alignment mechanism for aligning the boards on the carriage mechanism. CONSTITUTION:An alignment mechanism has two detecting means 16a and 16b arranged apart from each other and stops a carriage operation on a drive source 9 to make a reference level from a phantom level connecting the contact parts of said two detecting means 16a and 16b with a printing circuit board, when the leading end of a carried base board 19 has contacted both detecting means 16a and 16b. Therefore, the base board 19 is aligned when carried on a carriage mechanism 8 actuated with the drive source 9 and in contact with the two detecting means 16a and 16b. In this case, both detecting means 16a and 16b operate in cooperation with each other for stopping the drive source 9, thereby ensuring the interruption of the carriage of the board 19 after the alignment thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a transport device for printed circuit boards and the like, and particularly to a device that can ensure alignment thereof.

B. Prior Art This type of conveying device is installed between various processes in an apparatus for manufacturing printed circuit boards, etc., and is used to convey input printed circuit boards, etc. to the next stage of equipment.

When transporting the printed circuit board to the next stage, it is required to align the printed circuit board to a certain degree in consideration of the efficiency and accuracy of alignment at the next stage.

Therefore, in conventional transport devices, an alignment contact member that appears in the transport path is provided, and when the printed circuit board contacts this contact member and a predetermined period of time has elapsed, the transport motor is stopped and the printed circuit board is aligned. What it does is known.

C1 Problems to be Solved by the Invention However, since it is managed based on time, there is a problem in that the alignment work is completed even if the printed circuit board is not actually aligned.

SUMMARY OF THE INVENTION An object of the present invention is to provide a substrate transport device that can detect that alignment has been achieved reliably and then finish the alignment work.

The present invention will be explained with reference to FIGS. 1 and 2 showing an embodiment of means for solving the D0 problem. It has a mechanism 8 and an alignment mechanism that aligns the substrate 19 on the transport mechanism 8, and this alignment mechanism includes two detection means 16a and 16b arranged apart from each other, and the two detection means 16a , 16b is set as an alignment reference plane, and when the leading edge of the transported substrate 19 comes into contact with both the detection means 16a and 16b, the driving source 9 stops the transport.

81 action The substrate 19 is transported by the transport mechanism 8 driven by the drive source 9 . When the substrate 19 comes into contact with the two detection means 16a and 16b, alignment is achieved.

At this time, both the detection means 16a and 16b cooperate with each other to detect the drive source 9.
Since the conveyance is stopped after the alignment is ensured, the conveyance is stopped.

F. Embodiment An embodiment of the present invention will be explained with reference to FIGS. 1 to 4.

The belt frame 1 is held by a support 3 erected on a pedestal 2, and rotatably supports a drive shaft 4 and a driven shaft 5. These shafts 4 and 5 are provided with pulleys 6 and 7, and a conveyor belt 8 is passed between both pulleys, and a belt drive motor (drive source) drives the conveyor belt 8.
is driven in the direction of arrow A. In addition, belt frame 1
The left end 1a is a substrate input port, and the right end 1b is a substrate output port.

The roller frame 10 is installed so as not to interfere with the conveyor belt 8.
is provided, and can be moved up and down by a roller actuator 11 placed on the pedestal 2. A roller 12 rotating between each conveyor belt 8 is supported on this roller frame 10 via a roller shaft 13, and each roller shaft 13 is connected to each other by a connecting belt 14. One shaft 13 is rotated by a roller drive motor 15, and each roller 12 is rotated via a connecting belt 14.

Along the right-end outlet 1b of the belt frame 1, first sensors 16a to 16e for pre-alignment are installed on the sensor mounting member 17 at predetermined intervals. This sensor mounting member 17 can be moved up and down by a sensor actuator 11 installed on the pedestal 2, and the sensor group 16 appears in and out of the conveyance path. Each of the sensors 16a to 16e is a touch sensor that turns on when the printed circuit board 19 being transported comes into contact with it, and its contact portion is a roller, and an imaginary plane connecting the contact portions of each sensor is perpendicular to the transport direction A. It is arranged to do so. This virtual surface is taken as the pre-alignment reference surface. In addition, the distance between each sensor is set to 172 or less of the side length of the contact surface (indicated by 19a in FIG. 1) of the smallest printed circuit board to be transported, and the two sensors are separated by the contact surface of the smallest printed circuit board. 16a and 16b are turned on. A wall 17a is provided between each sensor slightly to the right of the above-mentioned virtual plane between each roller, so that even if the printed circuit board 19 moves diagonally, its corner does not get between the sensors. .

On the other hand, along the conveyance direction A, a second
sensors 20a and 20b are installed. These sensors 20a and 20b are touch sensors that turn on when the printed circuit board 19 sent in the B direction by the roller 12 comes into contact with them, and the contact portion is a roller, and a virtual surface connecting the contact portions of each sensor is formed. are arranged so as to be orthogonal to the virtual planes of the rollers 16a to 16e. In addition, the distance between each sensor is the contact surface (
(shown as 19b in FIG. 1).

Note that a conveying device 100 for the next process is provided to the right of the first sensors 16a to 16e.

Next, the control system of one embodiment will be explained with reference to FIG.

Each sensor 16a-16e, 20a, 20
The signals from b are input to the microcomputer 30,
Various signals are supplied to the switching transistors 31 and 32 and the electromagnetic switching valves 33 and 34 according to a processing procedure to be described later. The switching transistors 31 and 32 are connected to the belt drive motor 9. The transistors 31 and 32 are respectively provided on the ground side of the roller drive motor 15, and when the transistors 31 and 32 are conductive, the motors 9 and 15 are respectively driven. On the other hand, the electromagnetic switching valves 33 and 34 are connected to the pressure source 35 and the roller actuator 11, respectively. It is provided between the sensor actuator 18 and is switched in response to a signal from the microcomputer 30 to extend and retract the actuators 11 and 18.

In the above embodiment, the belt 8 constitutes the conveyance mechanism.

The operation of this embodiment will be described in detail according to the processing procedure shown in FIG.

In step S1, it is determined whether conveyance is to be started. If an affirmative determination is made, in step S2, the roller frame 10
to the lower position and the sensor mounting member 17 to the upper position. This is connected to the actuator 11 via the electromagnetic switching valve 33.
is contracted, and the actuator 18 is activated via the electromagnetic switching valve 34.
This is done by supplying a signal to the electromagnetic switching valves 33, 34 to cause the expansion. Next, in step S3, the belt drive motor 9 is driven. This is done by supplying a high level signal to the base of the switching transistor 31. The belt 8 is driven in the direction A by the drive of the motor 9, and the printed circuit board 19 inserted into the input port 1a is conveyed. In step S4, the first sensor 16a
It is determined whether any two of 16e to 16e are turned on.

If an affirmative determination is made, the process proceeds to step S5, where the switching transistor 31 is turned off and the motor 9 is stopped.

Thereby, the contact surface 19a of the printed circuit board 19 becomes perpendicular to the transport direction A.

Next, the process proceeds to step S6, where a signal is supplied to the electromagnetic switching valve 33 to extend the roller actuator 18 and set the roller frame 10 to the upper position. As a result, the printed circuit board 19 is completely separated from the upper surface of the belt 8 and the roller 1
2.

In step S7, the transistor 32 is turned on to drive the roller drive motor 15, the roller 12 is rotated, and the printed circuit board 19 is sent in the direction B. At this time, one side 19a of the printed circuit board comes into contact with the sensors 16a to 16e, but since the sensors 16a to 16e are formed on rollers and rotate, they are smoothly fed. In step S8, it is determined whether or not the second sensors 20a, 20b are turned on. If an affirmative determination is made, the process proceeds to step S9, where the transistor 32 is turned off and the motor 15 is stopped. As a result, the contact surface 19b of the printed circuit board 19 becomes parallel to the transport direction A, and the alignment is completed.

Next, in step S10, the roller frame 10 and the sensor mounting member 17 are set to the lower position in the same manner as described above. Thereafter, in step 811, the belt drive motor 9 is driven to transport the printed circuit board 19 to the next stage transport mechanism 100.

In addition, in the present invention, two detection means are provided that use a virtual plane connecting the substrate and each contact portion as an alignment reference plane, and when the substrate comes into contact with each detection means, they work together to activate the transport drive source. The alignment 8 operation is completed by stopping the apparatus, and the drive source and conveyance mechanism are not limited to those shown in the drawings.

In addition, as in the embodiment, since a plurality of sensors 16a to 16e are arranged at intervals of 1/2 or less of the side length of the minimum board, by counting the number of sensors turned on depending on the board, it is possible to It is also possible to know the size of the board being processed, and by reporting this information to the next process, smooth production management can be realized.

G1 Effects of the Invention According to the present invention, since the conveyance of the printed circuit board is stopped upon detecting that the printed circuit board has been aligned, it is possible to stop the transportation of the printed circuit board after it has been reliably aligned.

[Brief explanation of the drawing]

1 to 4 show one embodiment of the present invention, FIG. 1 is a plan view showing the overall configuration, FIG. 2 is a sectional view taken along the line n-■, and FIG. 3 is a diagram showing the control system. FIG. 4 is a flowchart 1~ showing an example of a processing procedure. 1: Belt frame 4: Drive shaft 5: Driven shaft 6.7: Pulley 8.14: Belt 9.15: Drive motor 10: Roller frame 11.18: Lifting actuator 12: Rollers 16a to 16e, 20a, 20b: Sensor 19 Niblint Board Patent Applicant: Nippon Kogaku Kogyo Co., Ltd. Representative Patent Attorney Fuyu Nagai Figure 4

Claims (1)

[Scope of Claims] A substrate transport device including a transport mechanism that is driven by a drive source to transport the substrate, and an alignment mechanism that aligns the substrate on the transport mechanism, wherein the alignment mechanisms are arranged at a distance from each other. at least two detection means, and a virtual plane connecting the substrate abutting portions of the two detection means is set as an alignment reference plane,
A substrate conveyance device, characterized in that the conveyance by the drive source is stopped when the tip of the conveyed substrate comes into contact with both of the detection means.