JPS6129158B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printed circuit board sorting device for an automatic electronic component insertion machine that automatically mounts electronic components onto a printed circuit board.

An electronic component automatic insertion machine automatically mounts electronic components on a printed circuit board placed at a predetermined position of the machine, for example, according to a program stored in an NC control unit. Then, the printed circuit board on which the electronic component is mounted is taken out from the component mounting position, sent by a conveyance means such as a conveyor, and stored in a printed circuit board storage stocker. However, electronic components are not necessarily mounted correctly on all printed circuit boards, and sometimes defective products occur. If such defective products are removed in the next inspection process, it will require a lot of manpower, which is not desirable. Therefore, it is considered that a robot arm is installed on the side of the conveyor to automatically take out defective products based on the detection signal of a defective product detection device, but this would increase the size of the machine and would require close proximity to the machine. sexuality will be inhibited.

The present invention has been made in view of these problems, and is directed to an automatic electronic component insertion machine that automatically mounts electronic components onto a printed circuit board placed at a predetermined position using a component insertion device. , a conveyor for transporting printed circuit boards on which electronic components are mounted; a stocker for storing printed circuit boards disposed above the conveyor; and a first operating position capable of catching printed circuit boards sent by the conveyor. A printed circuit board pushing means capable of assuming three operating positions: a second operating position that is higher than the first operating position and a third operating position that is lower than the first operating position; The printed circuit board sent by the conveyor is caught by the printed circuit board push-up means in the first operating position, and this push-up means is raised and moved to the second operating position, thereby lifting the printed circuit board. is stored in the stocker, and the push-up means is lowered and moved to the third operating position in response to a defective product detection signal or a signal based on an operator's operation, and the unnecessary product sent by the conveyor is moved to the third operating position. The present invention relates to a printed circuit board sorting device characterized in that the printed circuit boards are further fed on the conveyor and discharged without being caught by the printed circuit board pushing means. Therefore, according to the present invention, printed circuit boards can be sorted without providing a special device for discharging defective printed circuit boards.

An embodiment of an automatic electronic component insertion machine to which the present invention is applied will be described below with reference to the drawings. This electronic component automatic insertion machine inserts lead wires of electronic components into through holes formed in a printed circuit board, and automatically mounts the electronic components on the printed circuit board.

First, the outline of this electronic component automatic insertion machine will be explained with reference to FIG.
An X-Y table 13 is equipped with a pair of left and right turntables 12 on which the printed circuit board supplied from 1 is placed, and electronic components are supplied to the printed circuit board mounted on the turntable 12 and inserted into the through holes of the printed circuit board. a component insertion device 15 equipped with a pair of left and right insertion heads 14 for inserting lead wires;
An X-Y table moving device 16 for moving the X-Y table 13, a pair of left and right printed circuit board ejection devices 17 for ejecting printed circuit boards into which components have been inserted, and a pair of left and right printed circuit boards for storing ejected printed circuit boards. It is composed of a stocker 180.

As shown in Figure 1, this electronic component automatic insertion machine is configured symmetrically on the left and right sides, and electronic components are automatically mounted on two printed circuit boards at the same time, one on the left and one on the left. It's becoming like that. Therefore, in the following explanation, the structure of only the left mechanism will be mainly explained.

The printed circuit board discharging device 17 for discharging the printed circuit board 10 on which electronic components are mounted on the turntable 12 from the turntable 12 will be explained based on FIGS. 2 to 6.
A shutter 141 is disposed below the opening of the turntable 12 on the XY table 13 on which a caster ball 81 is provided on the lower surface. This shooter 141 has an arm 143 attached to a rotating shaft 142.
It is fixed through. Note that the rotating shaft 142 is rotatably attached to the support via a bearing 144. Further, the rotating shaft 142 has a pressed arm 14.
5 is installed. A long hole 146 is formed in this arm 145, and a pin 149 implanted at the tip of a rod 148 of an air cylinder 147 is fitted into this long hole 146. Therefore, when the air cylinder 147 operates, the rotating shaft 142 rotates via the arm 145, and the shooter 141 rotates and is held in the tilted position. For this reason, the printed circuit board 10 that has fallen from the opening of the turntable 12 will slide on the shooter 141 and fall onto the receiving plate 150.

The receiving plate 150 is fixedly arranged on the base 140. An air cylinder 151 is disposed below the receiving plate 15. This cylinder 151
is for positioning the fallen printed circuit board 10 on the receiving plate 150 in the direction A in FIG. That is, a bar 153 is attached to the piston rod 152 of the cylinder 151 as shown in FIG.
is attached, and arms 154 are fixed to both ends of this bar 153. A printed circuit board pressing plate 155 is horizontally fixed to the upper end of this arm 154. Therefore, air cylinder 15
1 is activated, the printed circuit board pressing plate 155 moves on the receiving plate 150 in the direction A in FIG.
6 to position the printed circuit board 10.

Furthermore, a printed circuit board pressing plate 157 is disposed on the side of this receiving plate 150 for pressing the printed circuit board 10 while regulating the position in the direction B in FIG. 3. This pressing plate 157 is connected to a chain 159 at both ends via connecting fittings 158, respectively. The chain 159 is wound around a pair of left and right sprockets 160, and a rotating shaft 161 to which one sprocket 160 is fixed is configured to be driven by a motor 162 via a chain 163. . Further, the printed circuit board pressing plate 157 is configured to be able to come into contact with a pair of micro switches 164 and 165, and these micro switches 16
4 and 165, the motor 162 is configured to be switched between forward and reverse rotation.

Next, the printed circuit board sorting device in the printed circuit board discharge device 17 will be explained based on FIGS. 3 to 5. A belt conveyor 166 is disposed on the left side of the receiving plate 150 in FIGS. 3 and 4. There is. The belt conveyor 166 has four round belts 1
67 is connected endlessly and hooked between guide rollers 169 attached to a pair of shafts 168, and the belt 167 is in contact with a tension adjusting roller 170 and a driving roller 171. The driving roller 171 is fixed to a driving shaft 172, and the driving shaft 172 is configured to be driven by a motor 173 via a belt 174.

An air cylinder 175 is arranged below the belt conveyor 166 as shown in FIG. This air cylinder 175 is supported on the lower surface of the base 140 via a pair of rods 176. A support plate 177 is fixed to the tip of the piston rod 175a of the cylinder 175. A pair of sleeves 178 are fixed to this support plate 177, and these sleeves 178 are fitted to the rod 176 via slide bearings. Therefore, as the air cylinder 175 operates, the support plate 177 is guided by the pair of rods 176 and is configured to move up and down. and support plate 1
Three push-up plates 179 are fixed to 77 so as to protrude upward. When the support plate 177 rises, these push-up plates 179 move upward through the round belts 167 of the belt conveyor 166, and lift the printed circuit boards 10 transferred by the belt conveyor 166 onto the belt conveyor. It is configured to be pushed into the stocker 180 on the stocker 166 from below. Note that there is a bending piece 1 at one end of the push-up plate 179.
81 is integrally formed, and the belt conveyor 1
The tip of the printed circuit board 10 that has moved on the bent piece 66 comes into contact with this bent piece 181.

The piston and rod 175a of the air cylinder 175 can be selectively operated in three operating positions. When the piston is in the lower position, the push-up plate 179 is located below the upper surface of the belt conveyor 166 as shown in FIG. Pass through the bottom. That is, defective printed circuit boards 10 are automatically selected here. Further, when the piston of the air cylinder 175 is in the intermediate position, the push-up plate 179 is at the same height as the top surface of the belt conveyor 166, and the printed circuit board 10 sent by the belt conveyor 166 is folded onto the push-up plate 179. It comes into contact with the curved piece 181 and stops moving. In this state, when the air cylinder 175 operates and the rod 175a rises, the push-up plate 17
9 pushes up the printed circuit board 10 and moves the stocker 180
It is designed to lead inward.

Next, regarding the stocker 180 disposed on the upper part of the belt conveyor 166, in particular, FIGS.
To describe the figure, a pair of stocker attachment bars 183 are installed between a pair of opposing parallel frames 182 of the belt conveyor 166.
It is installed perpendicular to the Four claws 184 are attached to each of these pair of bars 183. These claws 184 are particularly
As clearly shown in the figure, it is slidably held within a guide tube 185 that is fixed to a bar 183.
This pawl 184 is pushed in the projecting direction by a compression spring 186 within the guide cylinder 185. The lower surface of the distal end side of the claw 184 is formed into an inclined surface 187. Therefore, when the printed circuit board 10 is pushed up by the push-up plate 179, the edge of the printed circuit board 10 touches the inclined surface 18 of the claw 184.
Press 7 to get over this claw 184.

Next, the operation of the electronic component automatic insertion machine having the above configuration will be explained.

The printed circuit board 10 with components inserted therein is designed to naturally fall downward through the opening of the turntable 12. When the printed circuit board 10 falls, the shutter 141 arranged at the bottom of the XY table 13 is tilted, and the printed circuit board 10 will slide on this shutter 141 and fall. That is, when the air cylinder 147 shown in FIG. 2 operates, this air cylinder 147
Since the rod 148 is connected to the pressed arm 145 via a pin 149, the pressed arm 1
45 rotates counterclockwise around a rotating shaft 142 in FIG. Then this arm 145
A rotating shaft 142 to which is fixed rotates. Therefore, the shooter 1 fixed to this rotating shaft 142
41 is inclined as shown by the two-dot chain line in FIG. And the shooter 1 tilted like this
The printed circuit board 10 will fall onto 41.

Printed circuit board 10 that fell onto the computer 141
slides onto this shooter 141 and falls onto the receiving plate 150. Here, the printed circuit board 10 is correctly positioned and supplied to the belt conveyor 166. That is, the micro switch 201 is caused by the printed circuit board 10 falling onto the receiving plate 150.
When detected by , the air cylinder 151 disposed at the bottom of the receiving plate 150 is activated first. The rod 152 of this cylinder 151 is connected to the printed circuit board pressing plate 1 through a bar 153 and an arm 154.
55 (see FIG. 5), the operation of the air cylinder 151 causes the printed circuit board pressing plate 155 to move over the receiving plate 150 to the left in FIG.
That is, it moves in the direction of arrow A in FIG. 3, and this pressing plate 155 presses the rear end of the printed circuit board 10. As a result, the front end of the printed circuit board 10 comes into contact with the bent piece 156 of the receiving plate 150, and in this state, the air cylinder 151 temporarily stops operating.Then, the rod 152 is moved in the opposite direction, and the pressing plate 155
is separated from the rear end of the printed circuit board 10.

Then, the motor 162 starts rotating, and the rotation of the motor 162 is transmitted to the rotating shaft 161 via the chain 163. For this purpose, the rotating shaft 1
61 starts to rotate, and the chain 159 wound around the sprocket 160 fixed to the rotating shaft 161 moves. Therefore, the printed circuit board pressing plate 157 connected to the chain 159 via the connecting fitting 158 moves to the left in FIG. 4, that is, in the direction of arrow B in FIG. 3. By this movement of the pressing plate 157, the printed circuit board 10 is pushed to the left in FIGS. 3 and 4, and is placed on the rotating belt conveyor 166.

Then, the printed circuit board 10 is transferred to a belt conveyor 16.
6, the upper end of the pressing plate 157 comes into contact with the micro switch 165. Then motor 1
62 is reversed, and as a result, the pressing plate 1
57 moves to the right in FIG. When the pressing plate 157 comes into contact with the micro switch 164, the rotation of the motor 162 is stopped, and the pressing plate 157 is thereby stopped in preparation for pressing the next printed circuit board 10.
7 waits.

In this way, the printed circuit board 10 is configured to be positioned on the receiving plate 150 first in the direction A in FIG. The printed circuit board 10 is supplied to the belt conveyor 166 in the correct orientation. Furthermore, even if the size of the printed circuit board 10 changes, there is no need to adjust the machine each time, making the operation extremely simple.

By the action of the pressing plate 157, the belt conveyor 1
The printed circuit board 10 transferred onto the belt conveyor 166 is conveyed by a round belt 167 constituting the belt conveyor 166 and reaches the lower part of the stocker 180.
A belt conveyor 16 is installed at the bottom of the stocker 180.
A push-up plate 179 is waiting at the same height as the top surface of the push-up plate 179, and a bent piece 181 is integrally provided at the end of the push-up plate 179. The printed circuit board 10 is attached to this bent piece 181.
The front end of the printed circuit board 10 comes into contact with the printed circuit board 10, and the printed circuit board 10 stops moving at this position. Note that since the belt conveyor 166 continues to rotate, the printed circuit board 10 is relatively slipping on the belt conveyor 166 at this time.

When the printed circuit board 10 moves to the lower part of the stocker 180 and stops, the cylinder 175 is activated and the rod 175a moves upward. Then, the support plate 17 attached to this rod 175a
7 is guided by a pair of rods 176 and moves upward. Then, the push-up plate 179 supported by the support plate 177 moves upward through the round belt 167 and guides the printed circuit board 10 on the belt conveyor 166 into the stocker 180. At this time, the end of the printed circuit board 10 pushes the inclined surface 187 of the claw 184 provided on the stocker mounting bar 183 and pushes the claw 184 into the guide tube 185 against the spring 186, as shown in FIG. while climbing over this claw 184. Therefore, even if the push-up plate 179 is subsequently moved downward by the cylinder 175, both ends of the printed circuit board 10 will be locked by the claws 184 on both sides, and it will fall from the stocker 180. Never. In this way, the printed circuit boards 10 are sequentially pushed into the stocker 180 from below and are stacked one on top of the other in the stocker 180.

When a predetermined number of printed circuit boards 10 are stored in the stocker 180, the stocker 180 is removed from the conveyor 166. This stocker 180 is removed as follows. First, the air cylinder 175 is operated based on a manual operation command to move the push-up plate 179 sufficiently upward. As a result, the printed circuit board 10 in the stocker 180 is lifted upward relative to the stocker 180. Next, the claw plate 197 is pushed to cause the claws 198 of the claw plate 197 to protrude into the stocker 180 through the rectangular small holes 196 formed in the lower horizontal frame 192. Then, the claws 198 lock both widthwise ends of the lower surface of the printed circuit board 10 stored at the bottom, and even if the stocker 180 is lifted, the printed circuit board 10 will not fall from the stocker 180.

Furthermore, in this electronic component automatic insertion machine, the printed circuit board 10 with a mounting defect is placed in the stocker 180.
The printed circuit board can be discharged separately from non-defective printed circuit boards without having to be stored inside. That is, when a defective product detection device (not shown) detects a poorly mounted printed circuit board 10, or when a signal based on an operator's command is issued, the air cylinder 175 shown in FIG.
5a moves to the lower position. For this reason, the push-up plate 179 also moves downward, and the bent piece 181 of this push-up plate 179 no longer comes into contact with the printed circuit board 10. For this purpose, the printed circuit board 10 is
6, the paper passes under the stocker 180, falls from the belt conveyor 166 at the left end of the belt conveyor 166, and is discharged.

In this way, the printed circuit board 10 is stored in the stocker 180.
Since the air cylinder 175 for pushing inside is configured with a three-position type,
By selectively operating the air cylinder 175, defective products can be automatically distinguished and discharged based on the detection of whether the printed circuit board 10 is good or bad.

As described above, the present invention includes a conveyor 166 for conveying the printed circuit board 10 on which electronic components are mounted, a stocker 180 for storing the printed circuit board disposed above the conveyor 166, and a printed circuit board 10 that is transported by the conveyor 166. Printed circuit board 1
It is possible to take three operating positions: a first operating position that can capture 0, a second operating position that is higher than the first operating position, and a third operating position that is lower than the first operating position. Printed circuit board pushing means 1
79, the printed circuit board 10 sent by the conveyor 166 is caught by the printed circuit board push-up means 179 in the first operating position, and the push-up means 179 is raised to move to the second operating position. By moving the printed circuit board 1 to
0 in the stocker 180, and
In response to a defective product detection signal or a signal based on an operator's operation, the push-up means 179 is lowered and moved to the third operating position, and the defective printed circuit board 10 sent by the conveyor 166 is removed from the printed circuit board. The substrate is configured so that it is further fed on the conveyor 166 and discharged without being caught by the substrate pushing-up means 179.

Therefore, according to the present invention, since the defective printed circuit boards 10 are automatically selected by this device, the inspection and selection of the defective printed circuit boards 10 can be carried out in a simple process. Labor savings and automation will be achieved.

Further, according to the present invention, by causing the push-up means 179 for pushing the printed circuit board 10 into the stocker 180 to take the third operating position, the defective printed circuit board 10 sent by the conveyor 166 is
Since the defective printed circuit board is not caught by the printed circuit board push-up means 179 and is further sent as it is by the conveyor 166 and discharged, there is no need to specially provide a defective printed circuit board discharge device such as a robot arm, and the device can be configured compactly. and the proximity to the conveyor is not obstructed.

[Brief explanation of the drawing]

The drawings show an embodiment of an automatic electronic component insertion machine to which the present invention is applied. Figure 1 is a schematic plan view of this automatic electronic component insertion machine, and Figure 2 is a diagram showing how a naturally fallen printed circuit board is handled by a computer. A vertical cross-sectional view of the X-Y table and the printed circuit board ejecting device as seen from the side showing the sliding operation; FIG. 3 is a plan view of the printed circuit board ejecting device; FIG. 4 is a vertical cross-sectional view of the same as seen from the side; FIG. 5 is a perspective view of the main parts of the same as above, and FIG. 6 is a vertical cross-sectional view of the printed circuit board discharge device seen from the front, showing the operation of pushing up and storing the printed circuit board in the stocker. In addition, in the symbols used in the drawings, 10...printed circuit board, 166...belt conveyor, 175...
...Air cylinder, 176... Rod, 179...
Push-up plate (printed circuit board pressing means), 180...
Stocker for storing printed circuit boards, 181...It is a folded piece.

Claims (1)

[Claims] 1. An electronic component automatic insertion machine that automatically mounts electronic components onto a printed circuit board 10 placed at a predetermined position using a component insertion device 15, comprising: a printed circuit board on which electronic components are mounted; a conveyor 166 for conveying the printed circuit boards 10; a stocker 180 for storing printed circuit boards disposed above the conveyor 166; a first operating position where the printed circuit boards 10 sent by the conveyor 166 can be caught; a printed circuit board pushing means 179 that can assume three operating positions: a second operating position that is higher than the operating position of the conveyor; and a third operating position that is lower than the first operating position; The printed circuit board 10 sent in step 166 is caught by the printed circuit board push-up means 179 in the first operating position, and this push-up means 17
9 is raised and moved to the second operating position, the printed circuit board 10 is stored in the stocker 180, and the pushing up means is activated by a defective product detection signal or a signal based on an operator's operation. 179 is lowered and moved to the third operating position, and the conveyor 166
A printed circuit board sorting device characterized in that a defective printed circuit board 10 sent therein is further sent on the conveyor 166 and discharged without being caught by the printed circuit board pushing means 179.