JPS6153966B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printed circuit board feeding 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 supplied to a predetermined position of the machine, for example, according to a program stored in an NC control unit. Therefore, in order to fully automate this machine, a device is required to automatically move the printed circuit board from the feeding device to the insertion position. If the printed circuit board to be moved has different postures between the feeding device and the insertion position, for example, if the printed circuit board is vertical in the feeding device and horizontal in the insertion position. In this case, it becomes necessary to move the printed circuit board and change its posture at the same time. Therefore, in the past, the movement of the printed circuit board and the change of its orientation were performed separately. This has led to the problem that the apparatus becomes complicated and that the process takes a long time because the two operations are performed separately.

The present invention has been made in view of the above-mentioned problems, and includes moving a printed circuit board supplied from a printed circuit board feeding device toward a component insertion device using a printed circuit board moving device, and Therefore, in the electronic component automatic insertion machine that automatically mounts electronic components on the printed circuit board, a frame capable of reciprocating movement, a cam disposed along the moving direction of the frame,
and an arm for holding a printed circuit board rotatably supported by the frame and guided by the cam, and a pressing portion in the shape of an eccentric cam for pressing and locking the printed circuit board to the arm. a locking member configured to be rotatable relative to the arm; a spring biasing the locking member in the direction of its return rotation; and a release configured to be reciprocatable relative to the arm. A member is provided on each of the arms, and the pressing portion of the locking member, which is biased in the direction of backward rotation by the spring, causes the printed circuit board supplied from the printed circuit board supply device to be attached to the arm. When the arm, which is pressed and locked by the biasing force of a spring and holds the printed circuit board, moves with the movement of the frame, the arm is rotated by the cam with respect to the frame 47 and the printed circuit board is held in place by the cam. While changing the posture of the printed circuit board by 90 degrees, the release member contacts the contact member and moves forward relative to the arm 55, so that the locking member is moved in conjunction with the forward movement of the release member. The lock member is configured to rotate forward with respect to the arm 55 against the spring, and as a result of this forward rotation, the pressing portion of the locking member releases the pressing lock of the printed circuit board with respect to the arm. The present invention relates to a printed circuit board moving device in an automatic electronic component insertion machine characterized by: Therefore, according to the invention, the printed circuit board 1
Since the movement of 0 and the change of attitude can be performed by the same mechanism, the structure becomes simple. Furthermore, since both operations are accomplished simultaneously, the time required for the process is also shortened. In addition, despite the simple structure, the printed circuit board 10 can be reliably pressed and locked to the printed circuit board holding arm 55 by the pressing portion 58 of the locking member 57 without falling off while the printed circuit board 10 is being moved. Moreover, this pressing lock can be released very easily.

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 three 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 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 to fill the three 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.

First, the printed circuit board feeding device 11 will be explained with reference to FIGS. 2 and 3. A printed circuit board receiving plate 22 is attached to a frame 21 of this feeding device 11 in an inclined state. That is, especially the third
As shown in the figure, the receiving plate 22 is connected to a pair of pins 24 via a pair of arms 23, and these pins 24 are supported by the frame 21 by brackets 25. The printed circuit boards 10 are arranged vertically on this receiving plate 22. The rear surface of the printed circuit board 10 is a weight 2 placed on a trolley 26.
7, and the front surface of the frontmost printed circuit board 10 is received by a roller 28. The roller 28 is rotatably supported by a pair of brackets 29.
9 is fixed to the frame 24. Note that the printed circuit board 1 at the forefront that is in contact with the roller 28
The lower part of the printed circuit board 10 is detached from the receiving plate 22, so that the printed circuit board 10 can be moved downward.

A pair of rods 30 are arranged on the front side of the printed circuit board feeding device 11 side by side in FIG. 2, and are vertically supported by a frame 21. A scraping rod support plate 31 is supported at the upper end of this rod 30 so as to be slidable up and down. That is, the second
Sleeves 32 are fixed to both left and right sides in the figure, and these sleeves 32 are slidably fitted to the rod 30 via slide bearings. A compression coil spring 34 is interposed between the lower end of this sleeve 32 and a ring 33 fixed to the rod 30, which causes the support plate 31 to slide upward along the rod 30. The upper end of the sleeve 32 is connected to the left and right rods 3.
0 at their upper ends abut against a frame 35 connecting them.

Slits 36 extending in the horizontal direction are formed in the scraping rod support plate 31, and a pair of scraping rods 37 are secured by bolts 38 inserted through these slits 36. Rollers 39 are rotatably attached to the lower part of this rod 37, and these rollers 39 are configured to roll in contact with the surface of the printed circuit board 10 at the forefront. Further, a stepped portion 40 is formed on the scraping rod 37, and as the rod 37 descends, this stepped portion 40 engages with the upper edge of the printed circuit board 10 and moves the foremost printed circuit board 10 downward. It is configured as follows.

A support shaft 41 is fixed to the frame 35, and a press lever 42 is rotatably supported by the support shaft 41. A roller 43 is rotatably supported at one end of the pressing lever 42 and can come into contact with a pressed portion 44 attached to the upper end of the scraping rod support plate 31. The other end of the push lever 42 is engaged with a roller 45a attached to the push rod 45. This rod 45 is slidably supported by a sliding guide 46 fixed to the frame 21.

Next, the printed circuit board moving device will be explained based on FIG. 2, FIG. 4, and FIG. There is. That is, a pair of left and right sleeves 48 are attached to the frame 47, and these sleeves 48 are fitted to the rods 30 via slide bearings, thereby allowing the frame 47 to slide vertically up and down. Supported. A connecting portion 49 at the bottom of this frame 47 is connected to a rod 51 of an air cylinder 50. Therefore, the frame 47 is configured to move up and down by the operation of the air cylinder 50. A push bolt 52 is fixed to the right end of the frame 47 in FIG. 2, and this bolt 52 is configured to press the lower end of the rod 45 as the frame 47 moves upward.

Furthermore, a pair of bearings 53 are attached to this frame 47, and a rotating shaft 54 is supported by these bearings 53. A pair of printed circuit board moving arms 55 are fixed to this rotating shaft 54 . In particular, as shown in FIG. 5, the arm 55 has a slit-like notch 5 for inserting a printed circuit board.
6 is formed. A locking member 57 is disposed inside this arm 55. The locking member 57 has an eccentric cam-shaped pressing portion 58 for pressing and locking the printed circuit board 10 to the arm 55, and the center of curvature of the pressing portion 58 is aligned with the center of rotation of the locking member 57. It is eccentric with respect to the pin 59. Further, a long hole 60 is formed in this locking member 57, and a pin 61 is loosely fitted into this long hole 60. The pin 61 passes through a small hole in a release rod 62 configured to be able to reciprocate with respect to the arm 55, and further passes through a long hole 63 in the arm 55 to protrude to the side of the arm 55. This pin 61 and a pin 6 implanted on the side of the arm 55
4, a coil spring 65 is stretched between the coil spring 65 and the coil spring 65.
As a result, the locking member 57 is urged to rotate counterclockwise in FIG. 5 about the pin 59. As a result, the printed circuit board 10 inserted into the slit 56 is attached to the arm 55 by the locking member 57.
It is configured to be pressed and locked by a pressing portion 58 . A roller 66 is attached to the tip of the release rod 62, and a semicircular cam 67 is disposed so that the roller 66 comes into contact with it at the lower position in FIG. This cam 67 is attached to the connecting portion 49 of the frame 47 via an L-shaped bracket 68.

An arm 69 is further fixed to the rotating shaft 54. A roller 70 is attached to the tip of this arm 69. This roller 70 is attached to the cam groove 71 of the cam 71 attached to the frame 21.
is mated to. Therefore, when the frame 47 descends along the rod 30, the rollers 70 move into the cam grooves 72.
At the same time, the shape of the cam groove 72 causes the rotating shaft 54 to rotate, thereby rotating the printed circuit board 10 supported by the arm 55.

Furthermore, an air cylinder 74 is attached to the lower part of the frame 21 via a support plate 73, as shown in FIG. A pressing block 76 is fixed to the tip of the piston rod 75 of this cylinder 74. This block 76 is formed with a stepped portion 77 for pressing the rear end portion of the printed circuit board 10. The rear end portion of the printed circuit board 10, which is maintained horizontally by the stepped portion 77, is pressed and supplied to the turntable 12.

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

Printed circuit boards 10 into which electronic components are to be inserted by this machine are arranged vertically on an inclined printed circuit board receiving plate 22, as shown in FIGS. 2 and 3. Since the printed circuit boards 10 are arranged vertically on the inclined receiving plate 22 and are sequentially supplied, the printed circuit boards 1
0 is stepped, so that the printed circuit board 10 can be easily separated when the printed circuit board 10 is scraped off, which will be described later. Furthermore, the printed circuit board 10 is pressed against the roller 28 by a weight 27 on the trolley 26.
Since the weight of the printed circuit board 10 is supported by the support plate 22, the printed circuit board 10 is pressed against the roller 28.
The pressure is approximately constant regardless of the number of printed circuit boards 10, and deformation of the printed circuit boards is prevented. Furthermore, when the printed circuit board 10 at the forefront is scraped off, the printed circuit boards 10 on the receiving plate 22 are successively scraped off.
moves forward, but at this time printed circuit board 1
Since the lower part of 0 is stepped, the contact between the printed circuit board 10 and the receiving plate 22 is a line contact.
The printed circuit board 10 can be smoothly moved on the receiving plate 22.

Next, we will describe the operation of scraping off the printed circuit board 10 at the forefront that is in contact with the roller 28. First, the air cylinder 50 is activated, and the connecting portion 49 of the frame 47 is pushed by the rod 51 of this cylinder 50. . Then, the frame 47 moves upward in FIG.
Press the bottom end of 5. As a result, the rod 45 is guided by the sliding guide 46 and moves upward. Roller 45a attached to the upper end of rod 45
is fitted into the holding piece 42a which is attached to the end of the lever 42 and has a U-shaped cross section.
As the rod 45 rises, the lever 42 rotates about the support shaft 41 as shown by the chain line in FIG. Then, the roller 43 attached to the tip of this lever 42 scrapes off the rod support plate 31.
Press the pressed part 44 of. As a result, the support plate 31
moves downward while being guided by the rod 30 against the coil spring 34. Therefore, the pair of scraping rods 37 attached to the support plate 31 move downward, and first the rollers 39 of the rods 37 contact the front surface of the printed circuit board 10 and roll. Therefore, the rod 37 does not damage the surface of the printed circuit board 10 at this time. When the rod 37 further descends, the stepped portion 40 of the rod 37 comes into contact with the upper end of the printed circuit board 10 at the forefront, as shown in FIG. Since there is no receiving plate 22 at the position corresponding to the lower end of the printed circuit board 10 at the forefront, the rod 3
7 is lowered, the printed circuit board 10 is pushed by the stepped portion 40 and lowered. Note that at this time, the roller 28 that is in contact with the printed circuit board 10 rolls relatively over the printed circuit board 10, so that the roller 28 does not damage the surface of the printed circuit board 10.

The frame 47 continues to rise until it reaches the position indicated by the chain line in FIG. 2, and in this state the frame 47 stops. At this time, as shown in FIG. 4, since the cam groove 72 of the cam 71 is biased toward the front side (to the right in FIG. 4), the arm 69 rotates counterclockwise about the axis of the rotating shaft 54. in a moved position. Therefore, the printed circuit board moving arm 55, which is connected to this arm 69 via the rotating shaft 54, is in a horizontal rotational position as shown in FIG. Therefore, the lower end of the printed circuit board 10, which has been moved downward by the scraping rod 37, is placed on the arm 5 as shown in FIG.
It will be inserted into the slit 56 of No. 5.

At this time, the lower end of the printed circuit board 10 presses the pressing part 58 of the locking member 57, and this locking member 5
7 in a clockwise direction about the pin 59 against the coil spring 65. Since the center of curvature of the pressing portion 58 of the locking member 57 is eccentric with respect to the pin 59, the slit 5 of the printed circuit board 10
6 is easily inserted, but once the printed circuit board 10 is pressed and locked to one wall of the slit 56 by this locking member 57, the printed circuit board 10 is securely pressed and locked, and the locking member 57 is pressed and locked as described below. It will not come out of this slit 56 until it is forcibly rotated clockwise.

When the printed circuit board 10 is held by the printed circuit board moving arm 55, the air cylinder 50 is operated again, and the rod 51 is lowered this time.
Therefore, the frame 47 connected to this rod 51 also descends. As the frame 47 descends, the arm 55 supported by the frame 47 via the rotating shaft 54 also descends. The arm 69 fixed to the rotating shaft 54 during this descent
The roller 70 at the tip of moves within the cam groove 72 of the cam 71. Since the shape of this cam groove 72 is bent rearward (to the left in FIG. 5) as shown in FIG. 5, the printed circuit board moving arm 55 connected to the arm 69 via the rotation shaft As shown in FIG. 5, it gradually rotates clockwise as it goes downward. When the frame 47 is lowered to the lowest position, the printed circuit board moving arm 55 is rotated by 90 degrees and becomes vertical as shown in FIG. Therefore, the printed circuit board 10 supported by this arm 55 is in a horizontal state. At this time, the roller 66 at the tip of the release rod 62 supported by the arm 55 comes into contact with a semicircular cam 67, and the rod 62 is pushed upward. This movement of the rod 62 is controlled by the locking member 57 via the pin 61.
The locking member 57 rotates clockwise about the pin 59 against the coil spring 65.
As a result, the pressing and locking of the printed circuit board 10 by the pressing portion 58 of the locking member 57 is released.

Then, the air cylinder 74 is activated and the rod 75 moves forward. For this purpose, the stepped portion 77 of the pressing block 76 at the tip of the rod 75 presses the rear end of the printed circuit board 10 to separate it from the slit-shaped notch 56 of the arm 55, while pushing the
-Move it towards the Y-table 13 (see FIGS. 3 and 5). When the printed circuit board 10 is moved, both ends of the printed circuit board 10 in the width direction are guided by the stepped portions 86 of the guide rails 82 and 83, respectively.

Since the present invention has the above-described configuration, there is no need to provide an independent device for correcting the posture of the printed circuit board 10 in addition to the printed circuit board moving device, and with a simple configuration, the present invention can be used while the printed circuit board 10 is being moved. It becomes possible to change the posture at the same time. This allows the device to be configured very compactly, and since two operations are performed simultaneously, the operation time is shortened and productivity is improved.

In addition, although the structure is simple, the printed circuit board 10 is pressed and locked to the arm 55 for holding the printed circuit board by the pressing part 58 of the locking member 57 while the printed circuit board 10 is being moved, and this pressing part It is extremely easy to release the lock.

Further, the locking member 57 has an eccentric cam-shaped pressing portion 58.
Moreover, this locking member 57 is connected to a spring 6.
5, and this urging force presses and locks the printed circuit board 10 to the arm 55. Therefore, the printed circuit board 10 is very easily pressed and locked, but once pressed and locked, the printed circuit board 10 is reliably pressed and locked and will not fall off when the arm 55 rotates.

[Brief explanation of the drawing]

The drawings show an embodiment of an automatic electronic component insertion machine to which the present invention is applied, in which Figure 1 is a schematic plan view of this automatic electronic component insertion machine, and Figure 2 shows a printed circuit board feeding device and a printed circuit board movement device. A front view of the device, Figure 3 is a longitudinal sectional view of the same as seen from the side, Figure 4 is a longitudinal sectional view of the device.
The figure is an enlarged longitudinal sectional view of the main parts of the printed circuit board supply device seen from the side, showing the operation of scraping off the printed circuit board, and Figure 5 is the main part of the printed circuit board moving device, showing the operation of moving the scraped off printed circuit board. FIG. In addition, in the symbols used in the drawings, 10...
...Printed circuit board, 30...rod, 47...printed circuit board moving frame, 54...rotation shaft, 55...
...Printed circuit board moving arm, 57...Locking member,
58...Press portion, 62...Release rod (release member), 65...Spring, 67...Semicircular cam (contact member), 71...Cam, 72...Cam groove.

Claims (1)

[Scope of Claims] 1. The printed circuit board 10 supplied from the printed circuit board supply device 11 is moved toward the component insertion device 15 by the printed circuit board moving device, and the printed circuit board 10 is moved by the component insertion device 15 to the printed circuit board 10. An electronic component automatic insertion machine that automatically mounts electronic components includes a frame 47 that is reciprocally movable, and a cam 71 that is arranged along the moving direction of the frame 47.
and an arm 55 for holding a printed circuit board that is rotatably supported by the frame 47 and guided by the cam 71, and an arm 55 for holding the printed circuit board 10 by pressing the arm 55. a locking member 57 having an eccentric cam-shaped pressing portion 58 and configured to be rotatable with respect to the arm 55; a spring 65 that urges the locking member 57 in the direction of backward rotation; A release member 62 configured to be able to reciprocate with respect to the arm 55 is provided on each of the arms 55, and the pressing portion 58 of the locking member 57 is urged by the spring 65 in the direction of backward rotation. Then,
The printed circuit board 10 supplied from the printed circuit board supply device 11 is attached to the arm 55 by the spring 65.
When the arm 55 holding the printed circuit board 10 moves with the movement of the frame 47, the arm 55 is rotated with respect to the frame 47 by the cam 71. The release member 62 contacts the contact member 67 and moves forward relative to the arm 55, thereby causing the release member 62 to move forward by 90 degrees. Interlockingly, the locking member 57
rotates forward with respect to the arm 55 against the spring 65, and this forward rotation causes the locking member 57 to
A printed circuit board moving device in an automatic electronic component insertion machine, characterized in that the pressing portion 58 releases the pressing lock of the printed circuit board 10 from the arm 55.