JPH0964593A - Board carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance productivity by eliminating the loss time due to useless waiting time for carrying out the board. SOLUTION: A sensor 11 for detecting a part 7 mounted on a board 1, and a control means for switching the starting time of a carry-out means 9 corresponding to the lowering of a support plate 6 based on the detection results from the sensor 11 are disposed in the way of a carry-in means 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board conveying device used in an automatic component mounting machine for automatically inserting or mounting electronic components on a printed circuit board.

[0002]

2. Description of the Related Art As shown in FIG. 5, in a conventional substrate transfer apparatus, a printed circuit board a is transferred by a chain (not shown) along a transfer guide b and is carried into a holding table f at a working position c. After that, the support plate d at the working position c rises, and a large number of support pins e standing on the support plate d lifts and supports the printed board a supplied on the holding table f to a predetermined height, and a positioning pin (not shown). Position horizontally by fitting. In this state, the mounting head or the like is used for mounting or inserting components, or for other work. When components are mounted on the back surface of the printed circuit board a, the support pin e is set to a position, length and thickness that do not interfere with these components or damage the components and the support pin e. Therefore, the component mounting work can be performed on the front surface of the printed circuit board a having the components mounted on the back surface thereof, so that a double-sided substrate having the components mounted on both front and back surfaces can be manufactured.

After performing the necessary work, the support plate d descends and the printed circuit board a after the work is put back on the holding table f, and after it is detected that the lower limit position is reached, on the holding table f. The printed circuit board a is unloaded from the work position c along a transport guide g by a chain (not shown). By carrying out the printed circuit board a after lowering the support plate d to the lower limit position in this way, the support plate d is not fully lowered even though the components are mounted on the back surface of the printed circuit board a. When the printed circuit board a is unloaded onto the back side of the printed circuit board a, the back surface of the printed circuit board a enters between the components mounted on the printed circuit board a and is supported, and the support pin e is caught by the component mounted on the back surface. It is possible to avoid such a situation as being damaged.

[0004]

By the way, in recent years, in order to improve the productivity of the printed circuit board, the tact time for mounting components has been increased, and the transportation tact of the printed circuit board has a large proportion in the productivity. There is.

However, in the above structure, the support plate d is lowered to the lower limit position even for the printed circuit board a in which no component is mounted on the back surface and there is no problem of the support plate d being caught by the support pin e. The printed circuit board a at the work position c is carried out after waiting for the operation, and the waiting time in this case is wasteful and is a lost time in production.

It is an object of the present invention to provide a substrate transfer apparatus capable of improving productivity by eliminating the loss time due to such a wasteful waiting time when the substrate is unloaded.

[0007]

In order to achieve the above-mentioned object, the substrate transfer apparatus of the present invention is moved up and down at a working position to support a substrate to be supplied by raising it from below to a predetermined height. Then, a support plate used for work such as component mounting, a carry-in means for carrying in the board to the work position, and a carry-out means for carrying out the board from the work position are provided, and the board to be carried by the midway of the carry-in means. A sensor that detects whether parts are mounted on the back side,
According to the detection result of this sensor, a control means for switching the carrying-out start timing of the carrying-out means corresponding to the lowering of the support plate is provided.

[0008]

In the above-described structure of the substrate transfer apparatus of the present invention, the substrate carried into the working position by the carrying-in means is lifted up to the predetermined height by the lift of the support plate to perform the necessary work, and then the support plate is lowered. After that, the unloading means works and unloads the board after the work from the working position.While the board is carried into the working position, a sensor detects whether or not a component is mounted on the back surface of the board, and the support plate When the control means works on the descent of
Depending on the detection result of the sensor, the carrying-out start timing by the carrying-out means corresponding to the lowering of the support plate is switched, so that for the board on which the components are mounted, wait until the support plate descends to the lower limit position and then remove the board. Eliminates loss of time due to wasted waiting time by unloading the support plate without trouble and unloading the support plate early enough after the descent of the support plate, such as immediately after the descent, so that the substrate reaches the unloading path. The productivity can be improved by eliminating it.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A substrate transfer apparatus as an embodiment of the present invention will be described below with reference to FIGS.

The substrate carrying apparatus of this embodiment is intended for the printed circuit board 1, but is not limited to this. As shown in FIG. 1, the printed board 1 is carried along the guides 2 by a carrying-in means 3 composed of a chain and a carrying guide 2 (not shown) and carried into a holding table 5 at a working position 4. After that, the support plate 6 in the working position 4 rises, and a large number of the support pins 6 installed upright on the support plate 6.
The printed circuit board 1 supplied on the holding table 5 is lifted to a predetermined height and supported by a, and is positioned by fitting a positioning pin (not shown). In this state, it is used for component insertion and component mounting by a mounting head or the like (not shown), or other work.

As shown in FIG. 2, when the component 7 is mounted on the back surface of the printed circuit board 1 to be worked, the support pin 6a does not interfere with or damage the component 7, the position and the length and the thickness thereof. Since the printed circuit board 1 on which the component 7 is mounted on the back surface is set for mounting the component on the surface thereof, a double-sided board in which the component is mounted on the front and back surfaces can be manufactured. However, for the printed circuit board 1 on which no component is mounted on the back surface, it is sufficient that the support pins 6a have the same length and the same thickness and are arranged at regular intervals.

After performing the necessary work, the support plate 6 descends, and the printed board 1 at the working position 4 is moved by the carry-out means 9 including a chain (not shown) and the carrying guide 8.
However, if the support plate 6 descends and the printed circuit board 1 is placed back on the holding table 5 and the lower limit position is detected, it is possible to carry out the unloading. This is a wasteful waiting time for the printed circuit board 1 on which the component 7 is not mounted on the back surface, resulting in production loss time.

The holding table 5 has a chain (not shown),
The printed board 1 which is shared in cooperation with the carry-in means 3 is once brought into a predetermined work position 4, and the printed board 1 after work in the work position 4 is carried out in cooperation with the carry-out means 9. is there. However, the specific configurations of the loading / unloading means 4 and 9 can be variously designed.

In order to eliminate the above-mentioned loss time, in this embodiment, it is detected in the middle of the carrying-in means 3 whether or not the component 7 is mounted on the back surface of the printed circuit board 1 which is carried by the carrying-in means 3, as shown in FIGS. Sensor 11 and control means 12 including a microcomputer as shown in FIG. 3 for switching the unloading start timing of the unloading means 9 corresponding to the lowering of the support plate 6 in accordance with the detection result of the sensor 11.
Are provided.

As a result, the component 7 is mounted on the back surface of the printed board 1 while the printed board 1 is being carried into the working position.
Can be detected by whether or not a component crosses the detection optical path of the sensor 11, for example, and when the support plate 6 is lowered, the function of switching the carrying-out start timing of the control means 12 works. Thus, the unloading start timing of the unloading means 9 corresponding to the lowering of the support plate 6 is switched according to the detection result of the sensor 11.

By such switching, with respect to the printed circuit board 1 on which the component 7 is mounted, the printed circuit board 1 is taken out without any trouble after the support plate 6 is lowered to the lower limit position, and the component 7 is mounted. For the printed circuit board 1 that has not been carried out, the support plate 6 is carried out early after the descent of the support plate 6 such that the printed circuit board 1 reaches the carry-out path, for example, immediately after the descent, so that lost time due to unnecessary waiting time is eliminated and productivity is improved. Can be improved.

In this embodiment, in order to detect the carry-out timing, a sensor 13 for detecting that the support plate 6 is lowered to the lower limit position and a descent for the support plate 6 to put the printed circuit board 1 back on the holding table 5 are placed. Sensor 1 for detecting the position, that is, the position where printed circuit board 1 reaches the carry-out path
4 is provided and is connected to the control means 12 together with the sensor 11, the operation panel 15 and the like. The flow of each work of carrying in, working, and carrying out the printed circuit board 1 using the control means 12 is shown in FIG.

However, these can also be achieved by setting a timer after the support plate 6 starts descending. In particular, for example, the timing immediately after the support plate 6 is lowered so that the printed circuit board 1 reaches the carry-out path, even if the timer is not adjusted,
This can be sufficiently dealt with by ranking the operation control for operating the carry-out means 9 after the start of the descent.

[0019]

According to the board transporting apparatus of the present invention, after carrying out various works such as component mounting on a board which has been carried into a work position and supported by a support plate at a predetermined height,
For unloading, wait for the support plate to descend to the lower limit position for the board on which the components are mounted, and then unload the board without trouble, and for the board on which no components are mounted, the board unload path By carrying out the support plate that reaches a level such as, for example, immediately after the descent starts immediately after the descent, it is possible to improve productivity by eliminating loss time due to useless waiting time.

[Brief description of drawings]

FIG. 1 is a perspective view showing a substrate transfer device as one embodiment of the present invention.

FIG. 2 is a side view showing a positional relationship between a printed circuit board and a sensor during loading of the apparatus shown in FIG.

3 is a block diagram of a control circuit of the device of FIG.

FIG. 4 is a flowchart of operations of loading, working, and unloading based on the control of the control circuit of FIG.

FIG. 5 is a perspective view showing a conventional substrate transfer device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 4 Carrying-in means 5 Holding table 6 Support plate 9 Carrying-out means 11, 13, 14 Sensor 12 Control means

Claims (1)

[Claims] 1. A support plate that is moved up and down at a work position to lift and support a supplied substrate from below to a predetermined height for use in work such as component mounting, and a carry-in means for carrying the substrate into the work position. And a sensor for detecting whether or not a component is mounted on the back surface of the substrate to be transported by the transport device in the middle of the transporting means, the sensor including the sensor and the sensor for transporting the substrate from the working position. And a control means for switching the carry-out start timing of the carry-out means corresponding to the lowering of the support plate, according to the detection result of 1.