JP3385948B2 - Bulk feeder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulk feeder for supplying chips to an electronic component mounting apparatus. 2. Description of the Related Art An electronic component mounting apparatus for mounting electronic components (hereinafter referred to as "chips") on a substrate is provided with a parts feeder for supplying chips. As a parts feeder, a tape feeder, a tube feeder, a tray feeder, a bulk feeder, or the like is used. Of these, the bulk feeder has been increasingly used in recent years because it is advantageous for supplying a large amount of small chips. [0003] In a bulk feeder, small chips are randomly stored in a case. Then, the chips are discharged one by one from the case into the tunnel, and are transported to a chip pickup position by the transfer head of the electronic component mounting apparatus. The bulk feeder is disclosed in, for example,
As described in US Pat.
A plurality of units are arranged on the moving table. Then, it moves at a high speed on the moving table, stops at the pickup position by the transfer head, and supplies chips to the transfer head. Then, at the start of operation or when chips in the case are out of stock, the operator supplies chips to the case. [0004] As described above, the bulk feeder moves at a high speed on the moving table and stops at a predetermined position. In this case, the leading chip of the tunnel of the bulk feeder is The chip must be correctly positioned at the pick-up position, and if there is an error in this position, the transfer head cannot vacuum pick up the chip to the nozzle to pick it up. Therefore, conventionally, the accuracy of the pickup position of the chip has been secured by increasing the processing accuracy and the assembly accuracy of the components of the bulk feeder. However, in such a conventional method, there is a limit in obtaining the accuracy of the pickup position, and much labor and cost are required for processing and assembly. Accordingly, an object of the present invention is to provide a bulk feeder that can easily and accurately adjust the pickup position of a chip. According to the present invention, there is provided a table which is detachably mounted on a table moving on a moving table;
A tunnel that has a base mounted on the base, and stores a chip on the base; and a tunnel that moves the chips discharged from the case to a pickup position of the chips by the transfer head. When, of the tunnel portion and the shutter for opening and closing the tunnel there are pick-up position in the tip section, a bulk feeder comprising assembling and drive means for opening and closing the shutter, a first oblong on both sides of the base portion Forming a hole and a second hole, and forming a third hole and a fourth hole corresponding to the first hole and the second hole on both sides of the base; A first eccentric pin is inserted into the first hole and the third hole, a pin is inserted into the second hole and the fourth hole, and an end face of the base is inserted. Insert the contacting second eccentric pin into the hole of the base. By rotating the first eccentric pin, the base is rotated in a horizontal direction relative to the base with the pin as a center, and the position of the pickup position is adjusted in the X direction. By rotating the eccentric pin of No. 2, the base is moved forward and backward relative to the base to adjust the position of the pickup position in the Y direction. According to the above arrangement, the position of the pickup in the X direction is adjusted by rotating the first eccentric pin, and the position of the pickup in the Y direction is adjusted by rotating the second eccentric pin. Do. As a result, the chip can be sent to the correct pickup position, and can be reliably picked up by the nozzle of the transfer head. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a bulk feeder according to an embodiment of the present invention, FIG. 2 is a perspective view showing a state where a base and a base of the bulk feeder are separated, and FIG. 3 is an assembly of the base and the base of the bulk feeder. FIG. 4 is a plan view of the base of the bulk feeder. First, the overall structure of the bulk feeder will be described with reference to FIG. The bulk feeder 1 is configured by mounting a base 3 on a long plate-shaped base 2 and assembling components described below on the base 3. Reference numeral 4 denotes a frame mounted on the rear portion of the base 3, and the frame 4 has a thin box-shaped case 5.
Is held. A large number of chips are randomly stored in the case 5. An opening / closing lid 6 is slidably mounted on the upper surface of the case 5, and the chip is put in and out of the case 5 by opening and closing the opening / closing lid 6. A horizontal bar-shaped tunnel 7 is provided on the base 3. A shutter 8 is provided at the tip of the tunnel 7.
Are arranged. The shutter 8 has swinging members 9, 10,
11 are connected by pins 12 and 13. Reference numerals 14 and 15 denote springs for resilient the swing member 9 and the swing member 11, respectively. When the upper end of the oscillating member 11 is pressed by a rod 16 provided in the electronic component mounting apparatus, the oscillating member 11 oscillates up and down around the pin 13, and interlocks with the oscillating members 9 and 10. Also rocks. When the swing member 10 swings, the shutter 8 reciprocates in the direction of arrow a, and opens and closes the top surface of the tip of the tunnel portion 7. The chips in the case 5 are discharged one by one into the tunnel of the tunnel section 7. Air pressure is applied to the inside of the tunnel by pneumatic means (not shown), and the chips in the tunnel are transported forward (to the left in FIG. 1) in a line by this air pressure. When the shutter 8 is opened, the first chip in the tunnel is exposed, vacuum-adsorbed to the nozzle 18 of the transfer head 17 of the electronic component mounting apparatus, picked up, and mounted on a substrate (not shown). Reference numeral 19 denotes a chip which is vacuum-adsorbed to the lower end of the nozzle 18 and picked up. Next, with reference to FIG.
1 will be described. Stators 22 and 23 are mounted on both sides of the table 21. 24 is stator 2
Screws 2 and 23 are attached to the rear end face of the table 21. The front end surface of the base portion 2 is a wedge-shaped tapered surface, and this tapered surface is in contact with the tapered inner end surface of the stator 22. In addition, the engagement element 25 protrudes below the frame 4. When the lever 26 is rotated in the direction of the arrow, the engagement element 25 rotates in the front-rear direction via a toggle mechanism (not shown), and comes into contact with the tapered inner end surface of the stator 23. Therefore, by rotating the lever 26, the bulk feeder 1 can be fixed on the table 21 and can be removed from the table 21. The table 21 is placed on the moving table 30 as follows. Two guide rails 31 are provided on the moving table 30, and sliders 32 provided on the lower surface of the table 21 are slidably fitted on the respective guide rails 31. A nut 33 is mounted on the lower surface of the table 21. The nut 33 is a feed screw 3 disposed horizontally in the longitudinal direction of the moving table 30.
4 screwed. When the feed screw 34 is rotated by being driven by a motor (not shown), the table 21 and the table 21 are rotated.
The upper bulk feeder 1 moves along the feed screw 34 and the guide rail 31 and stops at a predetermined position. In the present invention, the feeding direction of the table 21 and the bulk feeder 1 on the table 21 (the direction orthogonal to the plane of FIG. 1) is referred to as an X direction, and the direction orthogonal thereto is referred to as a Y direction. In FIG. 1, reference numeral 35 denotes a handle for holding the bulk feeder 1. Next, a method of fixing the base 3 to the base 2 will be described with reference to FIGS. In FIG.
A first hole 41 and a second hole 42, which are slightly long, are formed on both sides of the base 2. A third hole 43 and a fourth hole 44 are formed on both sides of the base 3. A fixing hole 4 is provided slightly forward of the center of the base 2 and the base 3.
5, 46 are opened. A pin hole 47 is formed in the rear end of the base 3. As shown in FIG. 3, the base 3 is placed on the base 2, and the first eccentric pin 51 is inserted into the first hole 41 and the third hole 43. The head of the first eccentric pin 51 projects upward from the third hole 43. The second hole 42 and the fourth
The pin 48 is inserted into the hole 44 of the
Of the eccentric pin 52 is inserted. The peripheral surface of the second eccentric pin 52 abuts on the rear end surface of the base 2. FIG. 4 shows that the base 3 is
It is a top view of the base part 2 in the state superimposed on the upper part. Reference numeral 7a denotes a tunnel formed linearly in the tunnel portion 7, and 19 denotes a chip at a pickup position sent to the tip of the tunnel 7a. In FIG. 4, when the first eccentric pin 51 is rotated, the base 3 is horizontally rotated (swinged) relative to the base 2 around the pin 48 in the direction of arrow A to pick up the chip 19. The position is adjusted in the X direction. When the second eccentric pin 52 is rotated, the base 3 is
, And moves forward and backward in the Y direction (arrow B), and the pickup position of the chip 19 is adjusted in the Y direction. After the position adjustment of the pickup position of the chip 19 in the X direction and the Y direction is performed as described above, the screws 49 are inserted into the fixing holes 45 and 46, and the base 3 is firmly fixed to the base 2. As described above, by rotating the base 3 horizontally relative to the base 2 and moving it forward and backward, the tip of the tunnel on the base 3 can be correctly positioned at the chip pickup position. Next, a method of mounting a chip will be described. FIG.
, The bulk feeder 1 moves X
Move in the direction and stop at a predetermined position. Then, the shutter 8 is opened, and the tip 19 of the tunnel is moved to the transfer head 1.
7 is picked up by vacuum suction on the nozzle 18 and mounted on a substrate. In this case, since the positions of the base 3 in the X direction and the Y direction are adjusted correctly, the chip 19 at the head of the tunnel stops at the correct pickup position without displacement, and is reliably picked up by the nozzle 18 of the transfer head 17. Is done. As described above, according to the present invention, by rotating the first eccentric pin and the second eccentric pin, the relative positions of the base and the base in the X and Y directions are achieved. Since the adjustment can be performed, the chip can be stopped properly at the pickup position and picked up reliably by the nozzle of the transfer head.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a bulk feeder according to one embodiment of the present invention; FIG. 2 is a perspective view of a bulk feeder according to one embodiment of the present invention in a state where a base and a base are separated; FIG. 3 is a cross-sectional view of the assembled state of the base and the base of the bulk feeder according to one embodiment of the present invention; FIG. 4 is a plan view of the base of the bulk feeder according to one embodiment of the present invention; 1 bulk feeder 2 base 3 base 5 case 7 tunnel 8 shutter 9, 10, 11 swing member 17 transfer head 18 nozzle 19 chip 21 table 30 moving table 41 first hole 42 second hole 43 third hole 44 fourth hole 45, 46 fixing hole 48 pin 49 screw 51 first eccentric pin 52 second eccentric pin

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H05K 13/02

Claims (1)

(57) [Claim 1] A base portion detachably mounted on a table moving on a moving table, and a base mounted on the base portion, wherein the base is mounted on the base. , A tunnel having a tunnel for moving the chips ejected from the case to a pickup position of the chips by the transfer head, and a shutter at the tip of the tunnel for opening and closing the tunnel at the pickup position. And a drive means for opening and closing the shutter, wherein the first and second horizontal holes are formed on both sides of the base.
And a third hole and a fourth hole corresponding to the first hole and the second hole are formed on both sides of the base, and the first hole is formed. A second eccentric pin is inserted into the second hole and the fourth hole, and a second eccentric pin is inserted into the second hole and the fourth hole, and the second eccentric pin is inserted into the third hole. Insert the eccentric pin into the hole of the base,
Rotating the eccentric pin to rotate the base in a horizontal direction relative to the base with the pin as a center to adjust the position of the pickup position in the X direction, and to perform the second eccentricity. A bulk feeder, wherein the base is moved forward and backward relative to the base by rotating a pin to adjust the position of the pickup position in the Y direction.