JPS5934454B2 - Automatic feeding device for workpiece material to press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic feeding device used for pressing work of printed circuit wiring boards and the like.

Conventionally, press-cutting work for printed circuit wiring boards (hereinafter referred to as printed circuit boards) used for electrical wiring in computers and various communication devices involves obtaining pre-printed materials and first positioning each printed circuit board. Holes were drilled, materials were sent as they were obtained, and press working was carried out. However, carrying out all of these operations manually was accompanied by danger, and was extremely inefficient due to poor workability. The present invention eliminates the above-mentioned drawbacks, achieves automation and rationalization of the feed mechanism for workpieces for each automation of press work, and further enables press forming work such as original plates printed with more printed circuit boards. It has a higher level of sexuality.

Another object of the present invention is to punch out as many printed circuit boards as possible from an original board and to produce as little scrap material as possible by selectively gripping or releasing a plurality of gripping mechanisms.

Still another object is to swing the plurality of gripping mechanisms themselves to facilitate the work of attaching molds to a press machine.

Therefore, an embodiment of the present invention will be described with reference to the drawings, in which the workpiece is an original plate on which a plurality of printed circuit boards are printed and is supplied to a press machine.

As shown in FIG. 2, the present invention comprises a gripping mechanism A that grips a board P on which a plurality of printed circuit boards P are printed, a lateral sliding mechanism B that moves this gripping mechanism in the left-right direction, and a The gripping mechanism is roughly divided into a vertical sliding mechanism C that moves the sliding mechanism in the front-back direction, and a swinging mechanism D that swings and rotates the entire gripping mechanism.

As shown in FIG. 1, the specific shape of the original board P is, for example, 16 printed circuit boards P1, P2, 4 in both the vertical and horizontal directions.
・It is a printed version of P, 6, and there are multiple pieces (4 in the drawing) with equal intervals on one edge (lower edge in Figure 1) Fe.
Gripping holes Pa, Pb, Pc, and Pd are drilled.

This original board P is located on the upper surface of the bolster 1 of the press machine, and each printer board Pl, P2...Pl6 is pressed out from this board by the die 3 of the press machine 2 in the order shown by the arrows in FIG. It is something.

Now, the gripping mechanism A will be explained. As shown in FIG. 2, the arm 4 supported on the side surface of the lateral sliding mechanism B has a plurality of (four in the drawing) gripping means Al, A.
2,A3,. A4 is attached. Each of the gripping means Al, A2, A3, and A4 has the same configuration, and the specific shape of one of them M will be explained based on FIGS. 3 to 5. A fixing base 5 is fastened to the arm 4 with clamp bolts 6, and guide grooves 5a are provided at both ends of the fixing base as shown in FIG. A plurality of ball bearings 7 are provided on the inner surface of this guide groove 5a.
- are mounted at predetermined intervals. A sliding plate 8 is placed in the guide groove 5a of the fixed base 5, and is movable in the longitudinal direction. This sliding driving means is performed by an air cylinder 9 installed parallel to this sliding plate. That is, as shown in FIG. 5, an air cylinder 9 is fixed to a bracket 10 protruding from the side of the fixed base 5, and the tip of the ram 11 is connected to the side protrusion 8a of the sliding plate 8.
is connected to. Note that 12 is a stopper. A bracket 13 is provided on the upper surface of the sliding plate 8 as shown in FIGS. 3 and 6.
A lever 14 is rotatably supported on this bracket so as to be rotatable about a shaft 15.

The rear end of this lever 14 is rotatably connected to the tip of a ram 17 of an air cylinder 16 attached to the lower end of the sliding plate 8. The specific configuration of the tip of this lever is as follows.
As shown in the figure, a lever 1 swings around a shaft 18.
9, one end of which is connected by a shaft 21 to the lower end of a lever 20 passing through the lever 14, and the other end of the lever 19 is rotatably connected to the lower end of a locking pin 22 and a shaft 23. They are connected to form a link. Therefore, when the lever 14 rotates clockwise around the shaft 15 and opens, the lever 19 swings counterclockwise around the shaft 18, and the locking pin 22 is moved downward from the top surface of the sliding plate 8. sink to
The outer shape of this locking pin 22 is the gripping through hole A of the original plate P.
It can be freely inserted into one hole of A2, L, A2, and so on.
Adjustment of the vertical movement range of the locking pin 22 is performed by an adjustment screw 24 screwed into the upper end of the lever 20. Note that 25 and 26 are stoppers for positioning the original plate P. The other gripping mechanisms A1 to A3 all have the same configuration, so their explanation will be omitted.

Next, the lateral sliding mechanism B will be explained.

As shown in FIG. 2, the driving force of a pulse motor 28 installed on the left end of the top surface of the vertically moving table 27 is transmitted to the feed screw 30 via a reduction gear.

The tip of the feed screw 30 is supported by a bearing 29. On both ends of this table 27 are rails 31, 31.
is provided, and the lateral transfer table 32 is provided with rollers 33.
It is placed on these rails 31, 31 via. A nut 34 is provided vertically on the lower surface of the table 32 and is screwed into the feed screw 30. Therefore, by rotation of the pulse motor 28, this lateral transfer table 32 is moved to the second position.
Move left/right in the figure. Here, the swinging mechanism D of the arm 4 will be explained.

As mentioned above, one side of this table 32 (lower part of Figure 3)
The arm 4 is supported by a tightening screw 35. At one end of this arm 4 (left side in Figure 3),
There is a groove 4a facing upward, and this groove fits into the threaded portion of the tightening screw 36. Therefore, this arm 4 is connected and fastened to the sliding plate 4 by these two screws 35 and 36, and when these screws are tightened, this arm rotates counterclockwise in FIG. 8 about this screw 35. It is free. Therefore, when replacing the mold 3 of the press machine 2, these gripping means A1 to A
4 by rotating the arm 4 by half a turn, the gripping means A1 to A4 will not get in the way when the mold 3 is installed. Finally, the vertical sliding mechanism C will be explained.

As shown in FIG. 8, there is an angle 38 fixed to the side of the press, on which a table 39 is placed.

As shown in the third figure, rails 40, 40 are laid at both ends of this table 39, and the direction of these rails is perpendicular to the direction of the rail 31 of the table 27. A pulse motor 41 is also installed at one end of this table 39, and its rotational force rotates a feed screw 42 via a reduction mechanism. Reference numeral 43 denotes a bearing that pivotally supports the tip of the feed screw 42.

A nut 44 provided on the underside of the table 27
is screwed into this feed screw 42. A plurality of rollers 45 are attached to both ends of the lower surface of the table 27, and the table 27 is placed on the rails 40 of the table 39 via these rollers. Therefore, the table 27 moves on the rail 40 in the vertical direction (vertical direction) in FIG. 2 by the rotational drive of the pulse motor 41. As shown in FIG. 9, the angle 38 and the table 39 placed thereon are rotatably connected by a pillar 46.

That is, the column 46 is attached to the lower surface of the table by a screw 47 in a hanging state, and this column is fitted into a hole 48 formed in the angle 38. Furthermore, as shown in FIG. 8, brackets 49, 49 are fixed and protrude from the lower end of the angle 38 (FIG. 2) in opposing positions.

Female screws 50, 50 are protruded from the tips of the respective brackets 49, 49, and this female screw has a male screw 5.
1.51 is screwed in from the outside, and the tip of this male screw is joined to the side wall of the table 39. Therefore, this male screw 5
Table 3 is created by manually rotating the knob of No. 1 to protrude one of the male screws and at the same time retracting the other male screw.
9 rotates around the pillar 46. - Therefore, since the above-mentioned vertical and horizontal sliding mechanisms B and C rotate L, the gripping mechanism A also rotates in conjunction with the rotation L, so that the position of the entire feeding device can be adjusted. Next, a transfer device E for supplying the original plate P to the device according to the present application will be explained.

As shown in FIG. 7, the table 52 of the transfer device E has an air cylinder 53 for gripping the original plate P.
A cylinder 54 for reciprocating the table toward the press machine 2 is connected to one end of the table (left side in FIG. 7). On the surface of this device 52, there are means 55 and 56 for positioning the original plate P, and a detection limit switch LS2 is installed on one of these means. The original plate P is supplied to this device 52 from the bottom to the upper side in FIG. 7, and when the original plate P hits the positioning means 55, this switch LS2 is closed. Further, when the original plate P is sent to the apparatus of the present invention by this transfer device E, this original plate P is detected by the detection switch LS4. Reference numerals 57 and 58 in FIG. 2 are positioning cylinders for holding the original plate P at predetermined positions by the gripping means A1 to M.

Next, the operation of the present invention will be explained with reference to FIG. 10.11.

All operations such as gripping the original plate P, feeding it to a press, and punching are performed by signals from a well-known numerical control mechanism (hereinafter referred to as NC control).

As shown in FIG. 7, when the original plate P is installed on the transfer device E in alignment with the positioning means 55 and 56, the detection switch LS2
closes.

Then, as shown in FIG. 11B, the relay CR at address 50a
13 (hereinafter numbers are given in the explanations of FIGS. 11A and 11B) is activated. This relay CRl3 operates a presser cylinder 53 for gripping the original plate P provided in the transfer device E shown in FIG. At the same time as this relay CRl3 is activated, the ground CRal3 at address 55 is also closed. Therefore, contact 1 at address 53 is activated by an NC control signal.
V02 closes. Therefore, the relay CRl5 at the same address is activated, and the cylinder 54 (FIG. 7) is activated to operate the transfer device E.
Move to the left (Figure 1). Transfer device E is press machine 2
Detection switch LS4 at address 56
are exchanged, the relay CRl6 of the same address is activated, and therefore the cylinders 57, 58 (FIG. 3) for positioning the original plate P are operated, and this original plate is brought into contact with the positioning stopper 125 of the gripping means A1-9. Further, the contact CRal6 at address 61 is closed by the operation of the relay CRl6. Already contact point M.

2 is closed by the signal from the NC control, so the 1 step completion signal FIN enters the NC control device. Next, the contact M2O at address 57 is closed by NC control, and the holding means AO to 10 cylinders 16 are operated.

Then, the ram 17 extends and grips this original plate P. The cylinder 54 then returns to its original position and LS2 closes again, so that the relay CRl at address 57 is activated. Therefore, the contact CRal8 at address 62 also receives the closing 1 step completion signal F.
IN enters NC control. Then, a printed circuit board P1 is punched out from the original plate P using a press machine 2. Thereafter, by moving the movable tables 27 and 32 back and forth and left and right by pulse motors 28 and 41 driven by signals from the NC control, the original plate P is supplied to the press machine 2 and a press punching operation is performed.

Then, as shown in FIGS. 10A to 10D, when the printed circuit board P is sent to the lowest stage Pl3 to Pl6, the presence of one of the gripping means A1 to A4 becomes an obstacle to the pressing operation. Therefore, it is necessary to move the gripping means back to a position where it does not come into contact with the press machine located at the location where it becomes an obstacle. Therefore, the opening and retracting operations of this gripping means will be explained. First, FIG. 10A will be explained.

First, the contact Mll at address 2 is closed by the NC control signal, and the contact Mll at address 27 is opened. Therefore, relay CR7 becomes inoperable, and ram 1 of cylinder 16 of gripping means A4
7 retreats and releases its grip on this original plate P. Further, when the contact Mll at address 2 is closed, timer TRl is closed and relay CRl is operated, and contact CRl at address 15 is opened. Since the contact Mll at address 14 is open, the relay CR3 stops operating, and the ram 11 of the cylinder 9 of the gripping means A4 retreats. Then, this printed circuit board Pl3 is pressed into the press machine 2.
Punch out using die 3.

Next, the horizontal sliding table 32 is moved to the right by the pulse motor 28 by one printed circuit board, and then the press punching operation of the next pattern 4 is started. (Figure 0B) Here, the next opening and retreat of the gripping means A3, and the forward movement and gripping operation of the previous gripping means A4 are performed.

This gripping means A3 grips the original plate P since the contact M2O is already closed by the NC control signal and the relay CR8 at address 30 is operating.

First, the contact Ml2 at address 30 is closed by the NC control signal, and the relay CR3 stops working, and the ram 17 of the cylinder 16
moves backward, so the grip on the original plate P is released. On the other hand, contact Ml2 at address 3 is closed by the NC control signal, and timer TRl is closed.
operates and contact TRal closes. and relay CRl
operates, and the contact CRal at address 18 opens. Therefore, the relay CR4 at address 17 also becomes inoperative, and the ram 11 of the cylinder 9 moves backward. At the same time, the contact M1 at address 14 is closed by NC control, the relay CR3 is activated, and the ram 11 of the cylinder 9 of the gripping means M is extended and fitted onto the original plate P. When contact M2l at address 8 closes, timer TR at address 7
2 works, contact TRa2 at address 12 closes - Relay CR
2 works. As a result, contacts CRa2 at addresses 27, 30, 33, and 36 close, and when contact M2l at address 27 closes due to the NC control signal, relay CR7 is activated and cylinder 1
The ram 17 of No. 6 extends and the gripping means M grips this original plate P. In this way, each printed circuit board is successively pressed out from the original plate P.

In the present invention, as described above, the workpiece is gripped by the selectively extendable gripping mechanism, and the gripping mechanism, which is an obstacle to press punching, is moved back, thereby reducing material waste. .

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a plan view of the original plate, FIG. 2 is a plan view, and FIG. 3 is an enlarged sectional view taken along the line 1--
Fig. 4 is a sectional view taken along the line shown in Fig. 3, Fig. 5 is an enlarged plan view of the main part, Fig. 6 is a partially enlarged sectional view of Fig. 3, Fig. 7 is a reduced plan view, and Fig. 8 is a FIG. 7 is a front view, FIG. 9 is an enlarged sectional view taken along the line of FIG. 2, FIGS. 10A to 10D are operation explanatory diagrams, and FIGS. 11A and 11B are electrical circuit diagrams.

Claims (1)

[Claims] 1. A rail is laid on a table, a vertically movable table is placed on the rail so as to be freely movable, a means for driving the vertically movable table is provided, and a rail is placed on the vertically movable table in a direction perpendicular to the rail. A transversely movable table is placed on the rail so as to be movable, a means for driving the transversely movable table is provided, and one of the movable tables is provided with a plurality of gripping means for grasping the workpiece. A press machine is provided with means for selecting and expanding/contracting the gripping means facing the mold of the press machine when the workpiece gripped by the plurality of gripping means is punched by the press machine. Automatic feeder for processed materials.