JPS631754B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a marking device for electronic components such as diodes.

As shown in FIG. 1, in the case of a diode 3 having long electrode terminals (leads) 2 protruding from both ends of the sealing body 1, marks such as the product name and grade are printed on the outer peripheral surface of the sealing body 1. This printing may be performed, for example, by a marking device shown in FIG.
Here, the marking device will be briefly explained. The two electrode terminals 2 of the diode 3 serve as an anode and a cathode, so when marking,
It is necessary to supply the marking device with the polarities of the diodes 3 aligned. Therefore, the diodes 3 are sequentially inserted into the zigzag chute 4 with the polarities aligned.
As the name suggests, in the zigzag chute 4, the path along which the diodes 3 fall is alternately inclined and zigzag, and the diodes 3 fall through the zigzag path 5 under their own weight.
A drum-shaped index wheel 6 is arranged directly below the zigzag chute 4. This index wheel 6 is driven by a drive system (not shown).
It rotates around a rotating shaft 7 at its center. The circumferential surface of the index wheel 6 is located so as to be in contact with the lower end of the zigzag path 5 of the zigzag chute 4, and is adapted to receive and hold the diodes 3 of the zigzag path 5 in sequence from the lowest layer thereof. In order to hold the index wheel 6, as shown in FIG. The jetty 9 is provided with square grooves 10 for accommodating the leads 2 at regular intervals. The index wheel 6 is made of steel, and pressers 11 are provided on the circumferential surface on both sides of the housing groove 8, as shown in FIG. As shown in FIG. 2, this presser foot 11 extends from the lower end of the zigzag chute 4 to the half circumference on the rotating side of the index wheel 6 to prevent the diode 3 from falling off from the index wheel 6. When the square groove 10 on the peripheral edge reaches the lower end of the zigzag path 5 due to the rotation of the index wheel 6, the diode 3 in the lowest layer falls and enters the square groove 10 to accommodate the lead part. As the index wheel 6 rotates, the lead is held on the index wheel 6 by the square groove 10 and the presser foot 11.

Further, a marking mechanism 12 is provided on the rotation side of the index wheel 6. This marking mechanism 12 is a generally known mechanism, in which a transfer roll 13 is taken out to the outside, and a reversal mark printed on the transfer roll 13 is transferred to a diode carried by the rotation of the index wheel 6. 3
Printing is performed on the outer peripheral surface of the sealing body 1 by rotating contact. Stamping of the reversal mark on the transfer roll 13 is performed by contacting with a marking roll (not shown). Further, the supply of ink to the marking roll is performed by the operation of a series of mechanical parts such as an ink tank, a metal roll, and an inking roll (not shown).

On the other hand, a drum 14 is disposed directly below the index wheel 6 and rotates in synchronization with the index wheel 6 so that its circumferential surface substantially contacts the circumferential surface of the index wheel 6. This drum 14 is made of a non-magnetic and insulating material, and as shown in FIG. It consists of V-shaped receiving grooves 17 provided at regular intervals on the jetty 16, and a permanent magnet 18 built in near the bottom of the V-shaped receiving grooves 17. Since the position where the square groove 10 of the index wheel 6 and the V-shaped receiving groove 17 face each other is the position where the presser foot 11 is removed, the diode 3 housed in the square groove 11 falls due to its own weight. Then, it enters the V-shaped receiving groove 17 located directly below it. Since a permanent magnet 18 is disposed at the bottom of the V-shaped receiving groove 17, the diode 3 made of a magnetic material is attracted and held by the drum 14 by its magnetic force. Further, as shown in FIG. 4, the outer portion of the jetty 16 of the drum 14 is lowered further to form a receiving surface 19. This receiving surface 9 is a V-shaped receiving groove 1
7 and supports the lead 2.

Further, a pair of measurement terminals 20 are arranged on the sides of the drum 14 on the rotation side. The measurement terminals 20 resiliently face both receiving surfaces 19 of the drum 14 and contact the electrode terminals (leads) 2 of the diode 3 placed on the receiving surfaces 19, so that the polarity of the diode 3 may be incorrectly supplied. I am now checking to see if there are any. If the correct diode 21 has the desired polarity, an operation ON signal is sent to the correct product removal mechanism 22 provided at the bottom of the drum 14, and the removal lever 23 of the correct product removal mechanism 22 is rotated. The lead 2 of the diode 3 comes into contact with the lead 2 of the diode 3 and falls downward as the drum 14 rotates. In addition, in the case of an incorrect diode 24 whose polarity is reversed, the correct item removal mechanism 22 is activated.
It is possible to move away from the outer periphery of the drum 14 without sending an OFF signal and rotating the removal lever 23. As a result, the incorrect diode 24 held by the drum 14 passes the placement position of the correct item removal mechanism 22. However, on the side of the drum 14 past the proper product removal mechanism 22, an incorrect product removal mechanism 25 is disposed to scrape off the incorrect diode 24 from the drum 14. The tip of the inappropriate product removal mechanism 25 is the drum 1.
It consists of a bent scraping lever 26 that reaches the housing groove 15 of No. 4, and a shooter 27 that carries out the fallen inappropriate diode 24 to a desired position, and both are connected via a connecting piece 28 passed over the top of the shooter 27. , has an integrated structure. The proper product removal mechanism 22 is composed of a removal lever 23 and a solenoid 29 that supports one end of the removal lever 23. ON,
The OFF operation controls the rotation of the removal lever 23.

On the other hand, a conveyance mechanism 30 consisting of a chain conveyor is disposed below the drum 14, and a removal lever 23
The diode (appropriate product diode 3) 3 scraped off from the drum 14 by is received on the chain 31,
It is then conveyed and transported to a mesh-like storage box 32 arranged below the end of the chain conveyor. Further, a drying mechanism 33 is disposed above the chain 31 of the transport mechanism 30, and is designed to heat the diode 3 on the chain 31 to dry the mark. Note that the drying mechanism blows hot air onto the chain 31 as indicated by the arrow.

In such a marking device, the diodes 3 are sent one by one to the index wheel 6 through the zigzag chute 4, and marking is performed on the index wheel 6. Also, drum 1
After the polarity of the diodes 3 transferred to the top of the diodes 4 is confirmed, only the correct ones are sent onto the transport mechanism 30, where the marks are dried, and the diodes 3 are stored in the storage box 32, where they are serially transported. The marking work is completed.

However, such marking devices have the following drawbacks.

(1) The diode 3 removed from the drum 14 by the proper product removal mechanism 22 falls freely onto the chain conveyor, and is removed from the chain conveyor into the storage box 32.
Free fall to. Therefore, an impact is applied to the lead 2 of the diode 3, causing the lead 2 to bend. Moreover, the diode 3 is housed in the housing box 32 without directionality. Therefore,
It is necessary to correct lead bending and align the direction.

(2) Since the diodes 3 whose marks are not dried freely fall onto the conveyance mechanism, the diodes may come into contact with each other, or the undried mark portion may come into contact with the chain. As a result, the diode 3 becomes dirty and the mark becomes unclear, resulting in a decrease in yield.

(3) Since there is no measuring device, the number of diodes 4 housed in the storage box cannot be determined.

Therefore, an object of the present invention is to eliminate the need for polarity alignment work after marking by accommodating diodes supplied to a marking device with their polarities aligned in a storage box with their polarities aligned.

Another object of the present invention is to transport diodes without damaging their polar directions, to prevent lead bending and mark blurring due to mutual contact, etc., to eliminate lead bending work, and to prevent marks from becoming unclear. The purpose is to prevent a decrease in yield.

Furthermore, another object of the present invention is to provide a marking device that can manage the number of markings.

In order to achieve such an object, the present invention provides a drum-shaped index wheel that holds electronic components on its outer periphery and rotates, a chute that guides the electronic components to the index wheel in the same direction. A marking mechanism that prints a mark on the electronic component by contacting the electronic component held by the index wheel; An insulating drum that magnetically attracts and holds the electronic component, a detection mechanism that detects the polarity of the electronic component by bringing a measurement terminal into contact with the electrode terminal of the electronic component held by the drum, and a detection mechanism that works in conjunction with the detection mechanism to determine the appropriate polarity. a proper product removal mechanism that removes electronic components from the drum while maintaining their orientation; a non-conformity product removal mechanism that removes non-conforming electronic components from the drum; and electronic components removed by the proper product removal mechanism. A transport mechanism that transports electronic components one by one without losing directionality, a drying mechanism that is installed on the transport mechanism to dry marks on electronic components, and a storage box that is transported on an unloader belt conveyor. an unloader mechanism that takes out and stores electronic components from the end of the conveyance mechanism while maintaining the direction of the electronic components using magnetic force; and an unloader mechanism that counts the number of electronic components carried by the conveyance mechanism, The present invention will be described below with reference to examples.

FIG. 5 is a schematic diagram showing a diode marking device according to an embodiment of the present invention. This embodiment is an improved version of the marking device shown in FIGS. 2 to 4, in which the proper product removal mechanism 22, the transport mechanism 30, and the diode removal mechanism (unloader mechanism) from the transport mechanism are improved. It employs a counting mechanism that counts the number of diodes to be loaded. Therefore, the explanation of the overlapping parts will be omitted. Note that the names and symbols of each part will be used as they are. The diode 3 is transferred from the drum 14 to which the diode 3 that has been marked is transferred.
The correct product removal mechanism 22 for removing the solenoid 29 has the same structure as shown in FIG.
It consists of a removal lever 23 whose tip protrudes into the diode movement area of the drum 14 when turned on. However, the removal lever 23 has a different shape from the marking device. That is, the distal end of the removal lever 23 consists of a diode separation surface 34 that is a sloped surface that slopes downward toward the left, and a guide surface 35 that slopes downward toward the right from the bottom of this separation surface 34. There is. When the diode 3 that has been magnetically attracted to the drum 14 comes into contact with the separation surface 34, it moves down along the separation surface 34 against the magnetic force, and when the magnetic force no longer reaches it, it rests on the guide surface 35, and the diode 3 comes into contact with the separation surface 34. 3
5 and move onto the transport mechanism 30. As a result, the diode 3 moves onto the transport mechanism 30 while maintaining its orientation perpendicular to the plane of the paper in FIG.

On the other hand, the conveyance mechanism 30 consists of a chain conveyor with a double-strand structure, and each chain 31 is attached with an attachment 37 having a V-shaped recess 36 in the center. The lead 2 portion of the diode 3 is placed and supported on these V-shaped recesses 36. As a result, the diode 3 that has fallen while being guided by the guide surface 35 of the removal lever 23 enters the V-shaped recess 36 of the pair of attachments 37 and is supported without losing its directionality. In addition, drum 14
The rotation and the rotation of the transport mechanism 30 are synchronized to ensure that the diodes 3 enter the pair of V-shaped recesses 36 one by one.

In addition, a counting mechanism 4 consisting of a light emitter 38 and a light receiver 39 is included in a part of the transport mechanism 30.
0 is provided to count the number of diodes 3 carried on the carrying mechanism 30.

On the other hand, an unloader belt conveyor 41 is disposed below the terminal of the transport mechanism 30.
On the loader side of this unloader belt conveyor 41, for example, a mesh-like storage box 32 is placed and supplied one after another, and from the unloader side at the other end, a diode 3
The storage box 32 containing the storage box 32 is removed. The loading and unloading of the storage box 32 may be performed manually or automatically. Furthermore, as shown in FIG. 6, on both sides of the terminal portion of the transport mechanism 30, there are
A guide 42 made of a flat non-magnetic plate having wide intervals of mm to several mm and widening at the top is provided.
On the outer surface of the lower part of this guide 42, the upper part of a plate-shaped yoke (yoke) 45 made of a non-magnetic material is fixed to both ends of a permanent magnet 44 arranged below the upper belt 43 of the unloader belt conveyor 41. It is fixed via a spacer 46. Therefore, since a magnetic field is generated between the lower portions of the guides 42, the diodes 3 falling between the lower portions of the guides 42 are maintained in a horizontal state without coming into close contact with each other due to the magnetic field, and have been supported by the transport mechanism 30. Fall without losing direction. Furthermore, since the magnetic field becomes stronger as it goes downward, the diode 3 is attracted by this magnetic force and falls downward, causing the upper belt 43
Enter the storage box 32 located above. Further, since the leads of each diode are magnetized, they do not become entangled with each other in a magnetic field, so that lead bending due to entanglement does not occur. In addition, the guide 42
The lower end of the housing box 32 is inserted into the cut groove 47 on both sides of the upper surface of the housing box 32, ensuring that the diode is securely connected to the housing box 3.
2 and not between the guide 42 and the yoke 45. In this way, the diode 3
enters the containment box while maintaining its orientation. Further, when the counting mechanism 40 counts the passage of a set number of diodes 3, a constant rotation signal of the unloader belt conveyor 41 is sent from the counting mechanism 40 to a control system (not shown), and the unloader belt conveyor 41 is rotated at a constant speed. Rotate the amount. As a result,
A new empty storage box 32 is carried to the diode drop position at the terminal of the transport mechanism 30.

According to such a marking device, the following effects are produced.

(1) When the diode is transferred onto the transport mechanism 30 by the proper product removal mechanism 22, it must be transferred without losing directionality on the guide surface, and when it is transferred from the transport mechanism 30 to the storage box 32, it must be transferred by the magnetic field. Since the particles are transferred while maintaining their directionality, they can be stored in a storage box with the polarity aligned, and can be supplied as is for the next process, such as taping or packaging. Further, polar alignment work is also unnecessary.

(2) When moving the diode from the drum 14 to the transport mechanism 30 and from the transport mechanism 30 to the storage box,
The diodes do not intertwine.
Therefore, lead bending does not occur. Therefore, there is no need for lead bend correction work.

(3) When transferring the diodes from the drum 14 to the transport mechanism 30, each diode is placed on a pair of different chain attachments 37. Therefore, undried marks will not adhere to the chain or other diodes. Therefore, the diode is not contaminated, defects due to mark stains and unclear marks are reduced, and yield is improved. Also, there is no need to perform an external stain inspection.

(4) This marking device also has the practical benefit of being able to accurately count the number of diodes housed in the storage box 32.

Note that the present invention is not limited to the above embodiments. Furthermore, marking articles are not limited to diodes either.

As described above, according to the marking device of the present invention, since the marking device performs the work sequentially without changing the direction, mark defects, dirt, and lead bending caused by entanglement of electronic components with each other are avoided. Does not occur. Furthermore, the directionality of the final housing condition in the housing box also matches. As a result, lead bend correction work, direction alignment work, appearance dirt inspection work (including mark inspection work), etc. are no longer necessary, and work efficiency is improved. In addition, mark defects and stains do not occur, and the yield is improved. Furthermore, there are many effects such as being able to automatically store an appropriate number of electronic components in the storage box at all times.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the diode, FIG. 2 is a schematic diagram of the diode marking device, and FIG. 3 is a sectional view showing a part of the index wheel.
Figure 4 is a sectional view showing a part of the drum, and Figure 5 is a cross-sectional view showing a part of the drum.
The figure is a schematic diagram of a diode marking device according to an embodiment of the present invention, and FIG. 6 is a sectional view taken along the line - - in FIG. 5. DESCRIPTION OF SYMBOLS 1... Sealing body, 2... Lead, 3... Diode, 4... Zigzag chute, 5... Zigzag path, 6... Index wheel, 7... Rotating shaft, 8... Accommodating groove, 9 ... Jetty, 10 ... Square ditch,
11... Presser foot, 12... Marking mechanism, 13...
... Transfer roll, 14 ... Drum, 15 ... Accommodation groove, 16 ... Jetty, 17 ... V-shaped receiving groove, 18 ...
Permanent magnet, 19...Receiving surface, 20...Measurement terminal, 2
1... Proper diode, 22... Proper product removal mechanism, 23... Removal lever, 24... Inappropriate diode, 25... Inappropriate product removal mechanism, 26... Scraping lever, 27... Shooter, 28... Connection piece, 29... Solenoid, 30... Conveyance mechanism, 3
DESCRIPTION OF SYMBOLS 1... Chain, 32... Storage box, 33... Drying mechanism, 34... Separation surface, 35... Guide surface, 36...
...V-shaped depression, 37... Attachment, 38...
Emitter, 39... Light receiver, 40... Count mechanism, 41... Belt conveyor for unloader, 42
... Guide, 43 ... Upper belt, 44 ... Permanent magnet, 45 ... Yoke, 46 ... Spacer, 47
...cut groove.

Claims (1)

[Claims] 1. A drum-shaped index wheel that holds electronic components on its outer periphery and rotates, a chute that guides the electronic components to the index wheel in the same direction, and a chute that contacts the electronic components held by the index wheel. a marking mechanism that prints marks on electronic components; and an insulating mechanism that rotates close to the outer peripheral surface of the index wheel and magnetically attracts and holds the electronic components held by the index wheel to the outer peripheral surface of the index wheel. drum and
a detection mechanism that detects the polarity of the electronic component by bringing a measurement terminal into contact with an electrode terminal of the electronic component held on the drum; a proper product removal mechanism that removes unsuitable electronic components from the drum; a nonconformity product removal mechanism that removes unsuitable electronic components from the drum; and a defective electronic component that is removed one by one by the proper product removal mechanism. A transport mechanism that transports without
A drying mechanism is provided on the conveyance mechanism to dry marks on the electronic components, and a storage box is conveyed on the unloader belt conveyor by using magnetic force to maintain the directionality of the electronic components while being conveyed. 1. A marking device for electronic components, comprising an unloader mechanism for taking out and storing electronic components from an end of the mechanism.