JP5264049B2 - Work transfer device and work inspection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a chip part from being thrown out of a rotary table even if the rotary table is rotated at high speed when sliding the chip part, which is positioned on the rotary table, to convey it on a fixed table with rotation of the rotary table. <P>SOLUTION: This workpiece conveying device is provided with the fixed table 24, the rotary table 13 rotatably arranged between the fixed table 24, a clearance part 26 formed between opposite surfaces of the rotary table 13 and the fixed table 24, and a workpiece positioning fixture hole 31 opened in the rotary table 13. A workpiece 12 positioned in the fixture hole 31 is sucked to the fixed table 24 by the air sucked to the clearance part 26, and in this condition, the rotary table 13 is rotated to slide the workpiece 12 to convey it on the fixed table 24. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a workpiece transfer device for transferring a minute workpiece at a high speed and a workpiece inspection device for inspecting a workpiece transferred at a high speed.

  For example, a component inspection apparatus described in Patent Document 1 is known as an apparatus for inspecting characteristics of a minute electronic component such as a chip-shaped resistor, capacitor, or light-emitting diode that is conveyed one by one. This component inspection apparatus sucks a chip component supplied from a parts feeder to a vibration-free trough with a suction nozzle, and images a flying chip component with a CCD camera disposed between the vibration-free trough and the suction nozzle. The visual inspection of the chip component is performed by image processing the video.

  On the other hand, as a means for inspecting the electrical characteristics of the chip component, for example, the chip component supplied from the parts feeder is positioned on the rotary table, and one chip component is conveyed with the rotation of the rotary table. There is one that presses the probe one by one to make it conductive and inspects the electrical characteristics at that time.

However, in order to process the inspection of the electrical characteristics of the chip parts at a high speed, it is necessary to rotate the rotary table at a high speed and transport the chip parts at a high speed. There is a risk of being shaken off. In particular, in a chip component of a type in which an electrode that contacts the probe is provided on the lower surface side, such a problem is likely to occur because the lower surface of the chip component cannot be positioned by suction. For this reason, the rotary table cannot be rotated at a high speed, and as a result, the inspection of electrical characteristics cannot be performed at a high speed.
JP 2002-28578 A

  Accordingly, the problem to be solved by the present invention is to provide a workpiece transfer device that ensures the positioning of the chip component on the rotary table and prevents the chip component from being shaken off the rotary table even if the rotary table is rotated at a high speed. It is to be.

  Another problem to be solved by the present invention is to provide a workpiece inspection apparatus which can process the inspection of electrical characteristics of chip parts at a high speed by using the workpiece conveying apparatus.

In order to achieve such an object, a workpiece transfer device according to the present invention includes a fixed table, a rotary table that is rotatably disposed between the upper surface of the fixed table, and the rotary table and the fixed table facing each other. A gap formed between the surfaces to be fixed, a jig hole for positioning a workpiece opened in the rotary table, and the fixed in order to keep the gap width of the gap constant. It includes a ball bearing disposed between the table and the turntable, and a spring applying a constant force to the ball bearing through the rotating table in order to always ensure a constant gap width of the void portion, the jig The tool hole is formed in substantially the same shape as the outer shape of the workpiece. The clearance between the inner peripheral edge of the jig hole and the outer peripheral edge of the work positioned in the jig hole, the fixed table and the rotary table The gas sucked from the outer periphery into the gap portion of the, adsorbed lower surface of the workpiece has been positioned in the jig holes on the upper surface of the stationary table by further negative pressure state a gap portion gas was suction in the gap portion The workpiece is slid and conveyed on the upper surface of the fixed table by rotating the rotary table in this state.

  A workpiece inspection apparatus according to the present invention includes the workpiece conveyance device and an inspection unit for inspecting a workpiece conveyed by the workpiece conveyance unit.

  Since the workpiece transfer device of the present invention is positioned in a state where the workpiece is attracted to the fixed table, the workpiece is not shaken off from the rotary table even if the rotary table is rotated at high speed, and the workpiece is slid and transferred at high speed It became possible.

  In addition, the workpiece inspection apparatus of the present invention can process the inspection of the electrical characteristics at a high speed corresponding to the workpiece conveyed at high speed by the workpiece conveyance apparatus.

  Hereinafter, embodiments of a workpiece transfer device and a workpiece inspection device according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a workpiece transfer apparatus 10 according to the present invention and a workpiece inspection apparatus 11 incorporating the workpiece transfer apparatus 10. The workpiece inspection device 11 is used for inspecting the electrical characteristics of a workpiece 12 such as a chip resistor, a chip capacitor, or a chip LED, which are minute electronic components, and the workpiece 12 is placed on the rotary table 13 of the workpiece conveyance device 10. Parts feeder 14 for supplying the workpieces one by one, inspection means 15 for inspecting the electrical characteristics of the workpieces 12 conveyed by the rotary table 13, and workpiece distribution means 16 for classifying and collecting the inspected workpieces 12 according to their characteristics. Etc.

  As shown in FIGS. 2 to 4, the work transfer device 10 includes a rotary shaft 18 rotatably disposed on the upper surface of the base 17, and a fixing member supported on the rotary shaft 18 via a bearing 19. 20 and a rotary table 13 fixed to the upper end portion of the rotary shaft 18 via a collar 21. At the upper end of the rotary shaft 18, a neck portion 40 penetrating the central portion of the collar 21 and the rotary table 13 is provided, and a head portion 42 having a bulging portion 41 is screwed and fixed to the neck portion 40. A hollow portion 22 is formed at the center of the rotating shaft 18, and the hollow portion 22 communicates with a suction pipe 23 connected to the lower portion of the rotating shaft 18. Note that the tip of the suction tube 23 is connected to a suction device (not shown).

  The fixing member 20 includes a disk-shaped fixing table 24 at the top, and a work mounting portion 25 made of a hard insulating material such as ceramic is formed in a ring shape on the upper surface of the fixing table 24. Yes. Air passages 27 and 28 communicating with the hollow portion 22 of the rotary shaft 18 are formed between the fixed table 24 and the collar 21 and in the collar 21.

  On the other hand, above the fixed table 24, the rotary table 13 having substantially the same shape as the outer shape of the fixed table 24 is disposed. The rotary table 13 transmits only the rotational torque from the pin 43 to the collar 21 connected to the upper end of the rotary shaft 18, and rotates on the fixed table 24 together with the collar 21 as the rotary shaft 18 rotates. . A slight gap 26 is formed between the lower surface of the rotary table 13 and the work placement surface 25 of the fixed table 24. The gap 26 is provided over the entire surface where the rotary table 13 and the work placement surface 25 face each other, and is provided between the fixed table 24 and the collar 21 and through air passages 27 and 28 provided in the collar 21. The rotary shaft 18 communicates with the hollow portion 22.

Further, a ball bearing 29 held in a concave groove on the upper surface of the fixed table 24 is disposed between the fixed table 24 and the rotary table 13 along the inner periphery of the workpiece mounting surface 25. By arranging the ball bearing 29 over the entire circumference of the turntable 13, the gap width of the gap portion 26 is kept constant, and the turntable 13 rotates smoothly on the upper surface of the work placement surface 25. Is ensured by the rotation of the ball bearing 29. Further, in this embodiment, a spring 30 is disposed between a head 42 provided on the upper part of the rotary table 13 and the upper surface of the rotary table 13. The rotary table 13 is pressed by the spring 30 and a constant force is applied to the ball bearing 29, so that the gap width of the gap 26 is always kept constant even when the rotary table 13 is rotated. The pressing force of the rotary table 13 is adjusted by adjusting the screwing amount of the head 42 or changing the strength of the spring 30. Incidentally, there has been described a case where the baud bearings 29 as a holding means for maintaining the gap width of the void portion 26 in a fixed, also with a spring 30, respectively as a weighted means for applying a constant force to the baud bearings 29 in the above embodiment but as long as the present invention provides the same effects, it is of course not limited to baud bearings 29 and spring 30.

  The rotary table 13 is provided with a jig hole 31 for positioning the workpiece 12. A plurality of jig holes 31 are provided at regular intervals along the outer periphery of the rotary table 13. In this embodiment, as shown in FIG. 1, the jig holes 31 having the same shape are formed on the rotary table 13. Ten are provided on the entire circumference. The number of the jig holes 31 is determined by the size of the rotary table 13, the conveyance speed, the processing capability of the inspection means 15, and the like. In one example, the jig hole 31 has a pair of ceramic pieces 32a and 32b arranged on both sides in a direction orthogonal to the rotation direction of the rotary table 13, as shown in FIGS. Insulation with the 12 side electrodes 33a and 33b is ensured. The lower surface electrodes 34a and 34b of the workpiece 12 are kept insulative with the workpiece mounting portion 25 formed of ceramics or the like.

  The jig hole 31 is provided through the rotary table 13 in the vertical direction, and includes an opening that substantially corresponds to the shape of the workpiece 12. In this embodiment, the shape of the opening is substantially the same size corresponding to the shape of the quadrangular workpiece 12, and when the workpiece 12 is accommodated and positioned in the opening, a slight amount is formed around the workpiece 12. It is a grade which the clearance gap 36 is made. The left and right ceramic pieces 32 a and 32 b are formed with tapers 35 a and 35 b on the side facing the opening, and serve as a guide when the workpiece 12 is accommodated in the jig hole 31.

  In the work transfer device 10 having the above-described configuration, by operating the suction device, external air is sucked into the gap portion 26 between the fixed table 24 and the rotary table 13, and the sucked air is further absorbed. The air is sucked into the hollow portion 22 and the suction pipe 23 of the rotary shaft 18 through the air passages 27 and 28. The air sucked into the gap portion 26 is mainly sucked from the outer peripheral edge 37 of the fixed table 24 and the rotary table 13, but from the gap 36 at the outer peripheral portion of the work 12 accommodated in the jig hole 31. Some of the air that is sucked in is also included. Since the air in the space 26 is sucked into the space 26 to be in a negative pressure state, when the work 12 is accommodated in the jig hole 31, the work 12 is mounted on the work placement surface 25 of the fixed table 24. Will be absorbed. As a result, when the rotary table 13 is rotated, the workpiece 12 slides on the upper surface of the fixed table 24 while being attracted to the workpiece placement surface 25. Therefore, the rotary table 13 is temporarily rotated at a high speed. Even if the workpiece 12 is conveyed at a high speed, the workpiece 12 does not jump out of the jig hole 31.

  When the workpiece 12 is an LED chip as shown in FIG. 4, the substrate 12 a is very thin. Therefore, if the gap width of the gap portion 26 is wide, the substrate 12 a may enter the gap portion 26. On the other hand, if the gap width is narrowed so that the substrate 12a does not enter, the suction force is reduced. As described above, the smaller the workpiece 12 to be conveyed, the more difficult it is to manage the accuracy of the gap width of the gap portion 26. However, in the present invention, by using the ball bearing 29 as the holding means as described above, By using the spring 30 as the weighting means together, the accuracy control of the gap 26 can be easily and reliably executed even in such a case. Further, the suction force of the workpiece 12 on the workpiece placement surface 25 can be adjusted by changing the suction force in addition to the size of the gap width.

  The workpiece 12 slid and conveyed on the fixed table 24 by the rotation of the rotary table 13 is inspected for electrical characteristics by the inspection means 15. In this inspection, for example, when the work 12 is a light emitting diode, the work 12 is energized to emit light, and the brightness and emission color at that time are inspected as electrical characteristics. As one means of the inspection method, there is a method of inspecting the workpiece 12 in a state where the workpiece 12 is positioned in the jig hole 31. In this method, in order to prevent the workpiece 12 from floating from the jig hole 31 during the inspection, the upper surface of the workpiece 12 is pressed by some pressing means, and in this state, a probe (not shown) penetrated from below the fixed table 24. Is pressed against the lower surface electrodes 34a and 34b of the workpiece 12 to achieve electrical conduction. When the inspection of the electrical characteristics of the workpiece 12 is completed, the probe is moved downward away from the lower surface electrodes 34a and 34b, and at the same time, the pressing means is removed from the upper surface of the workpiece 12. Thereafter, the rotary table 13 is rotated again, the work 12 is slid and conveyed on the fixed table 24, conveyed to the position of the component sorting means 16, and then the work 12 is sucked and distributed according to the electrical characteristics.

It is a top view which shows the workpiece | work inspection apparatus which concerns on this invention. It is a longitudinal cross-sectional view which shows the whole shape of the workpiece conveyance apparatus which concerns on this invention. It is sectional drawing of the principal part of the workpiece conveyance apparatus which concerns on this invention. It is an enlarged view of the A section in FIG. It is an enlarged plan view of the jig hole of the workpiece transfer apparatus according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Work conveying apparatus 11 Work inspection apparatus 12 Work 13 Rotary table 15 Inspection means 24 Fixed table 26 Gap part 29 Ball bearing (holding means)
30 Spring (weighting means)
31 Jig hole 33a, 33b Side electrode (electrode terminal)
34a, 34b Bottom electrode (electrode terminal)
36 Clearance 37 Outer edge

Claims (5)

A fixed table;
A rotary table that is rotatably arranged between the upper surface of the fixed table;
A gap formed between surfaces of the rotary table and the fixed table facing each other;
Communicating with this gap, a jig hole for positioning the workpiece established in the rotary table ,
A ball bearing disposed between the fixed table and the rotary table in order to keep the gap width of the gap portion constant;
A spring that applies a constant force to the ball bearing via the rotary table in order to ensure a constant gap width of the gap,
With
The jig hole is formed in substantially the same shape as the outer shape of the work. A state in which the lower surface of the workpiece positioned in the jig hole is attracted to the upper surface of the fixed table by sucking the gas into the gap and further sucking the gas in the gap to bring the inside of the gap to a negative pressure state. A workpiece transfer apparatus characterized in that the workpiece is slid and transferred on the upper surface of the fixed table by rotating the rotary table. 2. The workpiece transfer apparatus according to claim 1, wherein the gap is formed with a substantially constant gap width across the entire surface where the fixed table and the rotary table face each other, and gas is sucked into the gap from the outer peripheral edges of both tables. A workpiece inspection apparatus comprising: the workpiece conveyance device according to claim 1; and a workpiece inspection unit for inspecting a workpiece conveyed by the workpiece conveyance unit. The workpiece inspection apparatus according to claim 3 , wherein the workpiece is an electronic component having an electrode terminal. The workpiece inspection apparatus according to claim 3 , wherein the workpiece inspection means inspects by pressing an inspection needle against an electrode terminal provided on a lower surface of the electronic component.

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