JPH041729Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is directed to a device for detecting defects in pellet assemblies during the manufacturing process of electronic components, such as tantalum capacitors, more specifically,
The present invention relates to a defect detection device for electronic components, which is capable of sorting out missing parts in pellets before storage and eliminating the number of steps required for defect selection during storage.

Conventional Technology Conventionally, in the manufacturing process of tantalum capacitors, good products and defective products (missing products) are stored at the same time.

Problems that the invention aims to solve Conventionally, since good products and defective products are stored at the same time, it is necessary to sort them during the manufacturing process, which increases the number of man-hours. In particular, the above-mentioned sorting is carried out manually by an operator, which causes problems such as an unsmooth indexing operation during the manufacturing process and a decrease in work efficiency.

Means for Solving the Problems The present invention was proposed in view of the above-mentioned conventional problems, and is a method for holding a workpiece, in which a plurality of parts are attached to a holder in a comb-like shape, intermittently at right angles to the arrangement direction of the parts. A supply conveyor to be transferred, a good product conveyor and a defective product conveyor placed respectively on both sides of the conveyance path of the supply conveyor, and a transfer that selectively transfers the workpieces on the supply conveyor onto the good product conveyor or the defective product conveyor. The mechanism is installed at both ends of the transfer mechanism in the transfer direction,
The apparatus is equipped with a sensor for detecting missing parts of the next workpiece on the supply conveyor, and the direction in which the next workpiece is transferred by the transfer mechanism is determined based on the detection result of the sensor.

Effect With the above configuration, when the transfer mechanism transfers the workpiece from the supply conveyor to the non-defective conveyor or the defective conveyor, and then returns to the supply conveyor during the return operation, or During the forward movement, the next workpiece on the supply conveyor is moved from one end to the other by a sensor installed at the front end of the transfer mechanism in the return direction or at the rear end in the forward movement direction. It is possible to scan for the presence or absence of.

The above-mentioned sensors are provided at both ends of the transfer mechanism in the transfer direction, and when transferring to either the good product conveyor or the defective product conveyor, one of the sensors scans for the presence or absence of missing teeth. I can do it.

If there is a missing tooth, the next workpiece is transferred to the defective product conveyor, and if there is no missing tooth, the next workpiece is transferred to the good product conveyor.

Note that the first transfer operation of the transfer mechanism at the start of operation may be carried out in an idle operation, and from the next time onwards, the sensor will detect and automatically sort the transfer mechanism.

Embodiment FIG. 1 is an overall schematic perspective view showing one embodiment of the device of the present invention, in which A is a supply conveyor, B is a good product conveyor, C is a defective product conveyor, and D is a transfer mechanism. , E, and F are sensors, and G is a workpiece.

The workpiece G has a plurality of parts 2 attached to a holder 1 in a comb-teeth shape, and in the case of a tantalum capacitor, the holder 1 is made of aluminum and the parts 2 are pellets.

The supply conveyor A includes endless chains 5, 5 stretched between driving chain wheels 3, 3 and driven chain wheels 4, 4.
A large number of support fittings 6, 6 are installed facing each other at equal pitches, and the workpiece G is supported by the support fittings 6, 6.
The holder 1 is supported at two points and is intermittently driven perpendicular to the arrangement direction of the parts 2.

Good product conveyor B and defective product conveyor C are placed on both sides of the conveyance path of supply conveyor A.
The workpieces G are received from the transfer mechanism D and transported to respective predetermined locations as appropriate. For example, in the tantalum capacitor manufacturing process, good product conveyor B
is composed of an intermittent-driven conveyor that carries the workpieces G in line at a constant pitch, and the defective product conveyor C is also composed of a similar conveyor.

As shown in FIGS. 2 to 4, the transfer mechanism D mainly includes a suction head 7, an elevating body 8, and a left-right moving body 9. First, the left-right moving body 9 is supplied from the non-defective conveyor B. It is supported so that it can move left and right on guide rods 10 and 11 that are stretched between conveyor A and defective product conveyor C, and can be moved left and right by a left and right cylinder (not shown). It is said that

A lifting cylinder 12 is attached to the horizontal moving body 9, and the lifting body 8 is connected to a piston rod 13 of the lifting cylinder 12.

The suction head 7 is supported by the elevating body 8 via guide rods 14, 14 so as to be slidable in the longitudinal direction, and is attached to the piston rod 1 of a longitudinally movable cylinder 17 attached to the elevating body 8 via a bracket 16.
8 through a guide rod connector 15.

On the front surface of the suction head 7, there is a suction pad 1.
9 and 20 are attached, and this suction pad 1
9 and 20 are actuated with intake air via an intake/exhaust switching valve (not shown).

The sensors E and F consist of light emitters 23 and 24 and light receivers 25 and 26, which are attached to both ends of the guide rod connection body 15 via brackets 21 and 22, and these are attached to the upper and lower sides of the brackets 21 and 22. It is screwed into the elongated holes 27 and 28 so that its height can be adjusted.

The above is the configuration of the embodiment of the device of the present invention,
Next, the operation will be explained.

The workpiece G is attached to the support fittings 6, 6 of the supply conveyor A.
It is supported at two points and transported intermittently.

The transfer mechanism D is located on the supply conveyor A, and when the operation is started, the piston rod 13 of the lifting cylinder 12 extends and lowers the lifting body 8.
Next, the piston rod 18 of the longitudinally movable cylinder 17 is extended to move the suction head 7 forward, and at the same time, suction air is applied to the suction pads 19 and 20. As a result, the work G located at the take-out position on the supply conveyor A is attracted, but the idle operation is performed only at the beginning of the operation. Subsequently, the piston rod 13 of the lifting cylinder 12 contracts to raise the lifting body 8, and then the left-right moving body 9 is moved, for example, onto the non-defective conveyor B by a left-right moving cylinder (not shown). Then, the piston rod 13 of the lifting cylinder 12 is extended to lower the lifting body 8. As a result, the suction head 7
This means that the workpiece G has been moved to the receiving position of the good product conveyor B, and here, the suction pad 1
The suction action of parts 9 and 20 is stopped, and the adsorption of the workpiece G is released. Then, the piston rod 18 of the longitudinally movable cylinder 17 contracts and the suction head 7 retreats, then the piston rod 13 of the elevating cylinder 12 contracts to raise the elevating body 8, and then the horizontally movable cylinder , the left-right moving body 9 is returned onto the supply conveyor A. During the return operation of the left-right movable body 9, the sensor F on the right side in FIG. 1 sequentially scans from the left end to the right end in FIG. do. The presence or absence of missing teeth in part 2 can be determined by checking the transmitter and receiver 24, 2.
If it is detected by the number of intermittent light interruptions in step 6 or the width of the distance between the light shielding pitches, and if there is a missing part in part 2, a command is issued to transfer the workpiece G to defective product conveyor C. If there is no missing part 2, a command is issued to transfer it to the non-defective conveyor B.

When a defective product is transferred to the defective product conveyor C, when the left-right moving body 9 returns from the defective product conveyor C to the supply conveyor A, the sensor E on the left side in FIG. The part 2 is scanned to see if there are any missing teeth.

The direction in which the next workpiece G is to be transferred is selected based on the detection result of either sensor E or F, and the suction head 7
Transfer is performed by repeating the above-mentioned operations. In the case of a non-defective product, the movement trajectory of the suction head 7 is a repetition of the experiment →→→→→→→ in Fig. 5, and the defective product moves to the right as shown by the dotted line and follows a movement trajectory symmetrical to that of the non-defective product. This is the result.

The illustrated example described above is one embodiment of the present invention, and the present invention is not limited to this embodiment. For example, detection by a sensor may be performed during forward movement of the transfer mechanism. In addition, the scanning position by the sensor scans the workpiece one position before the workpiece take-out position on the supply conveyor A, but this is the workpiece take-out position, and during the transfer operation of the transfer mechanism D, the next workpiece is scanned. The workpiece may be moved to the workpiece take-out position and scanned and detected during the return operation of the transfer mechanism D. Further, the suction head 7 may be replaced with a chuck-claw type head, or the movement of the head back and forth may be omitted. Further, as the driving means in each direction of the transfer mechanism D, in addition to the hydraulic cylinder, a combination of a forward/reverse rotation motor and a feed screw/nut may be used in whole or in part. In addition, the target work is not limited to pellet assembly in the tantalum capacitor manufacturing process.
Applicable to all parts that are attached to the holder in a comb-like shape.

Effects of the invention According to the invention, by utilizing the transfer operation of the transfer mechanism for sensor scanning, by simply providing sensors at both ends of the transfer mechanism in the transfer direction, a comb-like shape is formed on the base. In addition, by using the transfer mechanism as the scanning mechanism of the sensor, the overall structure can be made smaller and simpler, and it is possible to detect whether or not there are missing teeth in the attached parts. This has the advantage that automatic sorting can be carried out efficiently.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic perspective view showing one embodiment of the device of the present invention, FIG. 2 is a partially cutaway front view showing the relationship between the transfer mechanism and the supply conveyor, and FIG.
4 is a side view of FIG. 2, and FIG. 5 is an explanatory diagram showing an example of the movement locus of the transfer mechanism. A... Supply conveyor, B... Good product conveyor, C
...Defective product conveyor, D...Transfer mechanism, E, F...
...sensor, G...work.

Claims (1)

[Scope of Claim for Utility Model Registration] A supply conveyor that intermittently transports a workpiece in which multiple parts are attached to a holder in a comb-like shape perpendicular to the arrangement direction of the parts, and non-defective products placed on both sides of the conveyance path of the supply conveyor. a conveyor and a defective product conveyor; a transfer mechanism that selectively transfers the workpieces on the supply conveyor onto the good product conveyor or the defective product conveyor; and a transfer mechanism installed at both ends of the transfer mechanism in the transfer direction, and a sensor for detecting missing parts in the next workpiece, and the direction of workpiece transfer in the next transfer mechanism is determined based on the detection result of the sensor. Detection device.