JPH0824229B2 - Parts feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an apparatus for feeding a component tape containing components in a recess formed at equal intervals with a pitch and supplying the component to a component take-out tool such as a suction collet. It can be used for the electronic circuit board assembly process.

(B) Conventional technology Part tape may be used to supply parts.
The component tape mentioned here is formed by covering the recess opening of the main body tape in which the components are housed in the recesses formed at equal intervals with the cover tape. An example of a component supply device using this type of component tape can be found in Japanese Patent Application Laid-Open No. 57-188900. This device drives a ratchet wheel engaging with a component tape by external power to feed the component tape. Then, the take-up reel holding one end of the cover tape is rotated in contact with the rotating shaft, pulling the cover tape in the direction opposite to the component tape feeding direction and peeling it from the main body tape to wind it.

(C) Problem to be Solved by the Invention In the above-mentioned device, one rotating shaft is engaged with the take-up reel, and the take-up reel is rotated by the rotation of this rotating shaft. Therefore, when supplying various kinds of parts, a large number of take-up reels must be brought into contact with the rotation shaft, and all take-up reels must be continuously powered regardless of whether or not the cover tape is actually taken up. . Mechanically, it is simple but requires a lot of power,
In addition, wear of the rotating shaft is also a problem. There is also a method in which dozens of component tape feeding units are placed on a table, and this table is moved so that power is transmitted only to the unit that has arrived at a specific station, but this method requires a large amount of support to move the table. There is a problem that a drive structure is required and a space for moving the table must be secured. However, providing an independent power means for each component supply device also leads to high cost. The present invention is intended to solve this point.

(D) Means for Solving the Problems For this reason, the present invention provides a component tape in which parts are housed in recesses formed at equal intervals in the longitudinal direction of the main body tape, and the recesses are covered with a cover tape. While peeling off the cover tape, send the component tape to the component take-out position where the component take-out tool can take out at the same pitch as the recess interval, and take up the peeled cover tape on the take-up reel, and a plurality of the component cassettes. The tables arranged in parallel and the component take-out tool can be moved separately along the arrangement line of the take-up reel, and can be brought into contact with any take-up reel. And a reel drive mechanism for rotating the.

(E) Action The reel drive mechanism moves separately from the component take-out tool along the arrangement line of the take-up reel of the component cassette,
It comes into contact with the take-up reel of the component cassette that performs the tape feeding operation. At the same time as the parts cassette sends the parts tape, the reel drive mechanism rotates the take-up reel. The take-up reel winds a cover tape having the same length as the feed amount of the component tape.

(F) Example One example will be described with reference to the drawings.

FIG. 1 shows the structure of the component supply device 1. The component supply device 1 includes a main base 2, a table 3, a component cassette 4, a power transmission mechanism 5, and a reel drive mechanism 6.

On the upper surface of the main base 2, a plurality of pins 7 project in parallel in two rows at equal intervals. A stopper block 8 extends along the pin 7 on the main base 2. A block 10 in which screw holes 9 are formed at equal intervals with the pins 7 is mounted on one side surface of the main base 2. The stopper block 8 and the block 10 are used for detachably mounting the table 3 on the main base 2.

As shown in FIGS. 1 and 2, the table 3 is provided with a support plate on each of a pair of sliders 11 arranged in parallel at a distance.
12 is mounted, and the deck 13 is supported on the upper surface of the support plate 12. The front and back portions of the table 3 are covered by a connecting plate 14 that connects the supporting plates 12 to each other. To mount the table 3 on the main base 2, the guide groove 15 formed on the lower surface of the slider 11 is engaged with an arbitrary pin 7 of the main base 2 so that the slider 11 has a protrusion 17 at the tip of the stopper block 8. It is pushed until it hits the concave portion 18, and then, the bolt 19 fitted to the rear end of the slider 11 is screwed into the screw hole 9 of the block 10.

The component cassette 4 is of a type in which components are supplied by a component tape 25, and is mainly composed of a frame 26.
Two holes 27 are formed on the lower surface of the frame 26, and the positioning pins are arranged on both side edges of the deck 13 of the table 3.
Positioned by engaging 28. Reference numeral 29 is a lever rotatably supported by the frame 26, and a hook portion 30 formed in the lower portion is engaged with a hook 31 mounted near the center of the upper surface of the deck 13 to prevent the component cassette 4 from coming off. Parts tape
As shown in FIG. 3, the structure of 25 has concave portions formed at equal intervals.
A cover tape 35 for covering the recess 32 is attached to a main body tape 34 in which a component 33 is housed in 32. A plurality of tape feed holes 36 are formed on the side edge of the main body tape 34. The component tape 25 is wound around a reel 24 which is rotatably supported by a support plate 37 attached to the rear of the frame 26.
The tape guide 38 mounted in an inclined state on the guide 26 gradually guides it to a higher position, and reaches a component take-out position P at which the component 33 is taken out by a not-shown component take-out tool such as a suction collet set at the apex thereof. Reference numerals 40 and 40 denote sprockets that engage with the feed holes 36 of the component tape 25, and are connected to the lever 41 by a gear train (not shown). Lever 41
2 is rotated counterclockwise by a certain angle in FIG.
The sprockets 40, 40 rotate at a constant angle to feed the component tape 25 at a constant distance. 50 is a lever for rotating the sprocket 40, and a bracket 51 attached to the side of the deck 13
It is rotatably mounted by a pin 52. The lever 50 is biased counterclockwise in FIG. 2 by a coil spring (not shown) mounted in the bracket 51, and abuts against the upper portion of a stopper 53 having one end fixed to the bracket 51 to maintain the posture of FIG. Has been. The lever 41 is arranged for each component cassette, and a pusher (not shown) moving in the component cassette arranging direction pushes the lower portion of the lever 50 corresponding to the component cassette 4 that supplies components. This causes the lever 50 to move the lever 41 and rotate the sprocket 40 by a certain angle. Reference numeral 42 is a tape pressing plate that presses the component tape 25 against the tape guide 38, and the tip thereof extends to the front of the component take-out position P. The cover tape 35 is peeled off from the main body tape 34 at the tip of the tape pressing plate 42 and folded back. The stripped cover tape 35 is taken up by the take-up reel 43. Take-up reel 43
Is composed of a flange 44 having a boss portion 48 and a flange 45 detachably combined with the flange 44. The flange 44 is supported by a support shaft 46 whose center of rotation projects from the frame 26.
It is pressed against the frame 26 by a nut 47 that is screwed onto the 46. Therefore, a certain torque or more is required to rotate the flange 44. The flange 45 is detachably attached to the boss portion 48 of the flange 44, and the tip of the cover tape 35 is inserted into the slit 49 to prevent the cover tape 35 from slipping. The take-up reel 43 is the power transmission mechanism 5
The rotation is transmitted from the reel drive mechanism 6 supported by.

The structure of the power transmission mechanism 5 is as follows. Reference numeral 55 is a support wall that stands up from the main base 2, and is provided at both ends of the main base 2. As shown in FIG. 4, an upper and lower base 57 is mounted on the upper portion of the support wall 55 via a slide guide 56 that is vertically slidable. A square pipe-shaped beam 58 is laid over the upper ends of the upper and lower bases 57. A rail 59 extending in the arrangement direction of the component cassettes 4 is laid on the lower surface of the beam 58. One slider 60 is mounted on the rail 59, and a base portion 61 of an arm base 62, which is the main body of the reel drive mechanism 6, is mounted on this. Fifth
As shown in the figure, a belt clamper 63 is mounted on the upper surface of the base 61, and a part of the belt 64 is clamped. The belt 64 is wound around a pulley 65 arranged above the support wall 55. The pulley 65 is supported by a support shaft 68, and the support shaft 68 penetrates a bearing 67 mounted on one end of a bracket 66 mounted on the upper portion of the support wall 55. The other support wall 55
Also in, the pulley around which the belt 64 is wound is similarly supported. A pulley is also attached to the other end of the support shaft 68 and is connected to a stepping motor (not shown) by a belt 69. When the stepping motor rotates the support shaft 68, the slider 60 moves along the rail 59. A bearing 70 that rotatably supports the spline shaft 71 is provided on the arm base 62.
Is provided. Both ends of the spline shaft 71 are upper and lower bases
Supported by 57. One end of the spline shaft 71 is the upper and lower base 57
A little protrudes from, and the pulley 72 is attached here. Reference numeral 73 denotes a motor mounted on the lower portion of the inner surface of the upper and lower base 57, the rotary shaft of which is projected from a through hole 75 formed in the upper and lower base 57, and a pulley 76 is mounted here. Pulley
The belt 76 connects the 76 and the pulley 72. One end of a connecting rod 78 is connected to the lower end of the upper and lower bases 57. As shown in FIGS. 6 and 7, the other end of the connecting rod 78 is connected to one end of a triangular lever 79. The other end of the lever 79 has a rotating shaft 81 passing through the support wall 55.
Fixed to. The rotary shaft 81 is supported by the support walls 55 on both sides via bearings 80. A roller 84 is attached to an intermediate portion of the lever 79 at a position deviated from a line connecting the connecting point of the connecting rod 78 and the rotary shaft 81. An air cylinder 85 is supported on the support wall 55 downward by a clevis pin 86, and a plate cam 88 is attached to the tip of a rod 87.
The plate cam 88 is tapered downward in a wedge shape, and is inserted between the roller 89 and the roller 84 mounted on the outer surface of the support wall 55. As shown in FIG. 6, when the air cylinder 85 projects the plate cam 88, the roller 84 is raised along the cam surface, and the lever 79 rotates counterclockwise to move the upper and lower bases 57.
To rise. On the contrary, when the air cylinder 85 draws the plate cam 88 as shown in FIG. 7, the roller 84 descends along the cam surface, and the lever 79 rotates clockwise to pull down the upper and lower bases 57.

The reel drive mechanism 6, as shown in FIG. 4 and FIG.
A support shaft 91 parallel to the spline shaft 71 is made to project from the lower portion of the arm base 62. The support shaft 91 is fitted into a bearing 93 mounted on the arm 92 to rotatably support the arm 92. A pin 94 projects from one end of the arm 92, and one end of a coil spring 95 is connected to this. The other end of the coil spring 95 is connected to a pin 96 protruding from the arm base 62, and biases the arm 92 clockwise in FIG. A stopper 97 projects from the arm base 62 and contacts one end of the arm 92 to prevent the arm 92 from rotating. A support shaft 100 having a flange 99 formed in a part thereof is rotatably fitted to the other end of the arm 92. Pads on one side of flange 99
A disc 102 to which 101 is attached is mounted. 103 is a drum that is rotatably attached to the spindle 100, and the side surface is a pad 1
I am touching 01. A coil spring 1 is attached to the boss of the drum 103.
One end of 04 is engaged. The other end of the coil spring 104 is engaged with one end of a flange 105 mounted on the support shaft 100.
The flange 105 presses the coil spring 104 with a nut 106 screwed onto the support shaft 100. As a result, the drum 103 is pressed against the pad 101. A pulley 107 is attached to one end of the support shaft 100, and is connected to a pulley 108 attached to one end of the inner race of the bearing 70 by a belt 109. 110 is a tension roller that stretches the belt 109 without slack, and is supported by the arm base 62. As a result, the rotation of the motor 73 is transmitted to the drum 103.

Next, a series of operations of the component supply device 1 will be described with reference to FIGS. 8 and 9. The air cylinder 85 first projects the plate cam 88 to raise the reel drive mechanism 6. The reel drive mechanism 6 is driven by a stepping motor (not shown),
It moves on the take-up reel 43 of the parts cassette 4 and stops on the parts cassette 4 for feeding the parts tape 25 (eighth
Figure). Next, the air cylinder 85 draws in the plate cam 88 and lowers the reel drive mechanism 6. As a result, the drum 103 comes into pressure contact with the take-up reel 46 as shown by the phantom line in FIG. After this, the component cassette 4 sends out the component tape 25, and at the same time, the motor 73 rotates. The rotation of the motor 73 is transmitted to the drum 103 via the spline shaft 71, the pulley 108, the belt 109, and the pulley 107. As a result, the take-up reel 43 rotates to wind up the cover tape 35 (FIG. 9). After the winding is completed, the air cylinder 85 is again driven by the reel drive mechanism 6
Is raised to separate the drum 103 from the take-up reel 43.
After that, the reel drive mechanism 6 leaves the take-up reel 43 and moves to another take-up reel 43. However, even if the drum 103 is separated from the take-up reel 43, the load is applied to the take-up reel 43 by the nut 47. The cover tape 35 does not slacken due to reverse rotation.

As the take-up reel 43 winds up the cover tape 35, the diameter of the wound cover tape 35 gradually increases,
The rotation angle required to wind up also changes. In the present invention, the drum 103 is rotatable with respect to the support shaft 100, and is normally a pad.
Since the rotation is transmitted by the frictional force with 101, when the take-up reel 43 finishes winding the amount of the cover tape 35 fed out and further rotation becomes impossible, the drum 103 is connected to the pad 101. Stops rotation due to slippage. Therefore, the cover tape 35 is not pulled by force.

(G) Effect of the Invention In the present invention, since the reel drive mechanism rotates only the take-up reel of any component cassette, the power for driving the take-up reel can be minimized. Further, since the parts cassette is arranged on the immovable table and the reel driving mechanism is moved to an arbitrary parts cassette, it is not necessary to construct a large-scale driving mechanism for moving the parts cassette on the table. I'm done.

In addition, since the reel drive mechanism can be moved separately from the component take-out tool, while the component take-out tool is taking out a component, the tape for storing the component to be taken out next is sent out for feeding the tape of the component cassette. The cover tape can be wound up, and the next part to be taken out can be taken out directly without performing the cover tape winding operation accompanying the tape feeding when the parts take-out tool is moved to the parts cassette. It is possible to reduce the cycle time for supplying parts.

[Brief description of drawings]

FIG. 1 is a perspective view showing the structure of the component supply device, FIG. 2 is a partially cutaway side view showing the structure of the component cassette and the component cassette and the table, and the connection state between the table and the main base, and FIG. 3 is the component. FIG. 4 is a perspective view showing the structure of the tape, FIG. 4 is a partially cutaway front view showing the structure of the power transmission mechanism and the reel drive mechanism, and FIG. 5 is a side view showing the structure of the reel drive mechanism.
6 and 7 are side views showing the vertical movement of the power transmission mechanism, and FIGS. 8 and 9 are schematic front views showing a series of operations of the component supply device. 34 …… Main body tape, 32 …… Concave, 33 …… Parts, 35 …… Cover tape, 25 …… Parts tape, 43 …… Take-up reel, 4 …… Parts cassette, 3 …… Table, 6 …… Reel Drive mechanism.

Claims (1)

[Claims] 1. A component tape in which components are housed in recesses formed at equal intervals in the longitudinal direction of a main body tape, and the recess is covered with a cover tape, and the component tape is recessed while the cover tape is peeled off. At the same pitch as the above, while sending out to the parts picking position where the parts picking tool can be taken out,
A component cassette for winding the peeled cover tape on a take-up reel, a table for arranging a plurality of the component cassettes in parallel, and a component take-out tool which can be moved separately along an arrangement line of the take-up reel, and are arbitrary. And a reel drive mechanism capable of contacting the take-up reel of the parts cassette and rotating the take-up reel of the parts cassette.