JP5052882B2 - Flexible plate-shaped member supply device and electronic component mounting device - Google Patents

Description

  The present invention relates to a supply device capable of detecting whether or not a flexible plate-like member housed in a supply portion is supplied, and an electronic component mounting apparatus using the supply device.

  The mounting apparatus includes a die bonding apparatus for mounting a semiconductor chip (hereinafter simply referred to as a chip) as an electronic component on, for example, a lead frame as a flexible plate member, a lead frame, and a chip mounted on the lead frame. There are wire bonding devices that connect with wires.

  Such a mounting apparatus has a mounting head. A mounting tool is provided in the mounting head, and a stage is disposed at a position facing the mounting tool.

  The lead frame is taken out from the supply device and sent out to a conveying means such as a conveying rail. The lead frame sent out to the transport means is transported and positioned at a position facing the stage by the transport means. Thereby, a chip is mounted on the lead frame by the mounting head, or the chip and the lead frame are connected by a wire.

  The supply device has a supply magazine as a supply unit in which the lead frames are stacked and stored at a predetermined interval. This supply magazine has a box shape in which one end face and the other end face along the lead frame feeding direction are opened, and one end of the lead frame stored in the supply magazine is pushed by a pusher arranged opposite to the one end face. Press. As a result, the lead frame is sent out from the other end opening of the supply magazine to the transport means and transported.

  The supply magazine is driven in the vertical direction by an elevator. When the lowermost lead frame is sent out, for example, it is driven by a predetermined dimension downward in the height direction, and the next lead frame is at a height facing the pusher. Positioned to be Thereby, a plurality of lead frames stacked and stored in the supply magazine can be sent out sequentially.

  The lead frame sent out from the supply magazine and the height and parallelism of the transport means do not match precisely, or the lead frame sent to the transport means previously stays in the transport means due to a detection failure or an operator error. Then, the lead frame sent out from the supply magazine by the pusher cannot be smoothly delivered to the transport means.

  In that case, the lead frame may be greatly bent and damaged. In particular, in the case of a lead frame on which a chip is mounted in advance, the cost loss caused by the damage may increase.

Therefore, conventionally, as a supply device that sends out a lead frame from a supply magazine, as shown in Patent Document 1, the pusher is elastically held by a spring, and when the pusher presses the lead frame, the pressing force is more than If the reaction force received by the pusher becomes large, the spring is deformed by the differential pressure between them and the pusher is relatively displaced in the backward direction. A mechanical detection method is used in which it is detected that a delivery failure has occurred in the lead frame based on the displacement of the pusher.
JP-A-4-294549

  However, recently, a very thin film of about 0.07 to 0.08 mm may be used as a lead frame. In the case of such a thin and soft lead frame, if the lead frame is pressed and sent out by the pusher, the lead frame will be deformed. Even if the lead frame is deformed, the differential pressure between the pressing force and the reaction force at that time becomes considerably small, and it may be difficult to accurately detect the deformation of the lead frame.

  Even if the flexible plate-like member is thin and easily deformed, the present invention can not only reliably supply it, but also reliably ensure that if a feeding failure occurs due to deformation or the like during supply. It is an object of the present invention to provide a supply device capable of detection and an electronic component mounting device using the supply device.

This invention is a supply apparatus for supplying a flexible plate-shaped member,
A supply unit in which the flexible plate-like member is slidably stored;
A drawer mechanism for pinching and pulling out the tip of the flexible plate-like member housed in the supply unit;
A rotating body that rotatably contacts the flexible plate-like member drawn from the supply unit by the pull-out mechanism;
The flexible plate-shaped member supply apparatus includes: a detecting unit configured to detect that the flexible plate-shaped member is pulled out from the supply unit by the rotation of the rotating body.

  The drawer mechanism includes a pair of openable and closable chucks that sandwich the flexible plate member housed in the supply unit, and a drive mechanism that drives the chucks in the pulling direction of the flexible plate member. A chuck mechanism is preferred.

  It is preferable that the detection means detects whether or not the rotating body has rotated in synchronization with the operation of the drive mechanism.

  Both ends of the supply portion are open, and a plurality of the flexible plate-like members are accommodated and held in the vertical direction so as to be slidable at predetermined intervals, and are provided so as to be driven in the vertical direction by a vertical drive mechanism. It is preferable that the chuck mechanism sandwiches a leading end portion of the flexible plate member positioned in the vertical direction by the vertical drive mechanism and pulls it out from the supply portion.

This invention is a mounting apparatus for mounting an electronic component on a flexible plate-shaped member,
Conveying means for conveying the flexible plate member;
A supply device for supplying the flexible plate-like member to the conveying means;
A mounting device for mounting an electronic component on the flexible plate-like member which is conveyed to a conveying means by the supply device and positioned at a predetermined position;
The supply apparatus is an electronic component mounting apparatus having the structure described in claim 1.

  According to this invention, since the flexible plate-shaped member housed in the supply unit is pulled out by the pull-out mechanism, the supply unit can be used even when the flexible plate-shaped member is thin and easily deformed. It can be reliably pulled out from the supply. Since the flexible plate-like member drawn out from the supply unit rotates with the rotating body coming into contact with the flexible plate-like member, when the flexible plate-like member is pulled out poorly, the rotating body does not rotate. It becomes possible to reliably detect a pull-out failure of the adhesive plate member.

Embodiments of the present invention will be described below with reference to the drawings.
1 to 7 show an embodiment of the present invention. FIG. 1 shows a mounting apparatus for mounting a chip 2 as an electronic component on a lead frame 1 as a flexible plate member. This mounting apparatus has a feeder 3 as a transport mechanism. The feeder 3 has a pair of transport rails 4 and a feed mechanism (not shown) that pitch-feeds the lead frame 1 supplied to the transport rails 4 as described later in the direction indicated by the arrow X along the transport rails 4.

  A supply device 8 having a supply magazine 7 for supplying the lead frame 1 is provided on one end side of the feeder 3, and the other end is sent by the feeder 3 and the chip 2 is mounted in the middle as will be described later. A collection magazine 11 for collecting the lead frame 1 is provided. Each magazine 7 and 11 can be driven in the vertical direction by an elevator 12.

  A mounting head 14 having a dispenser 13 and a mounting tool 14 a is sequentially disposed in the middle of the feeder 3 along the feed direction of the lead frame 1. The dispenser 13 supplies an adhesive to the portion of the lead frame 1 where the chip 2 is mounted.

  The mounting head 14 can be horizontally reciprocated between the upper portion of the feeder 3 and the chip supply unit 15 disposed on the side of the feeder 3, and the mounting stage is provided to face the feeder 3. It is also driven in the vertical direction above 16 and above the chip supply unit 15.

  The chip supply unit 15 includes a wafer stage 17, and the wafer stage 17 is provided with a semiconductor wafer 2 </ b> A divided into a large number of chips 2. A wafer magazine 18 in which semiconductor wafers 2A are stored in multiple stages is provided on the side of the wafer stage 17. The semiconductor wafer 2A accommodated in the wafer magazine 18 is supplied to the wafer stage 17 by a supply arm 19.

  The supply magazine 7 of the supply device 8 is formed in a box shape with one end surface and the other end surface in the longitudinal direction opened as shown in FIGS. 2 and 5, and the one end surface faces the transport rail 4. The elevator 12 can be driven in the vertical direction indicated by the arrow Z in FIG.

  The supply magazine 7 has a plurality of holding grooves 21 extending in the longitudinal direction on both inner surfaces at predetermined intervals in the vertical direction, and the lead frame 1 is disposed in the width direction in a pair of opposing holding grooves 21 having the same height. Both ends of the slidably engaged with each other and held.

  Further, U-shaped concave portions 22 are formed on the upper and lower surfaces of one end portion of the supply magazine 7, and a stopper shaft 23 against which the rear end of the lead frame 1 received and held in the holding groove 21 hits the other end portion in the vertical direction. Is provided. When the rear end of the lead frame 1 abuts against the stopper shaft 23, the positions of the front ends coincide.

  A drawer mechanism 25 is provided between the supply magazine 7 and one end of the transport rail 4 to pull out the lead frame 1 stored in the supply magazine 7. As shown in FIGS. 2 to 4, the drawer mechanism 25 has a pair of guide rails 26 arranged in parallel with the transport rail 4 on the side of the transport rail 4. A pair of guide rails 26 is provided with a movable body 27 so as to be slidable via receiving bodies 28 provided at both ends in the width direction of the lower surface. The guide rail 26 is laid on the upper surface of the base 29.

A nut body 31 is provided at the center in the width direction of the lower surface of the movable body 27 as shown in FIG. A screw shaft 32 is screwed onto the nut body 31. As shown in FIG. 2, a pair of support bodies 29a are erected on both ends in the longitudinal direction of the base 29, and one end of the screw shaft 32 is rotatably supported by one support body 29a.

The other support 29 a is provided with a feed motor 33, and the other end of the screw shaft 32 is connected to a drive shaft 33 a of the feed motor 33. Accordingly, when the screw shaft 32 is driven to rotate, the movable body 27 is driven along the guide rail 26.
The nut body 31, the screw shaft 32, and the feed motor 33 constitute a drive mechanism that drives a chuck mechanism described later.

  As shown in FIG. 3, a U-shaped support member 34 is erected on the movable body 27 with a pair of side portions spaced apart in the drive direction of the movable body 27. Between the pair of side portions of the support member 34, a pair of support shafts 35 are rotatably installed at predetermined intervals in the vertical direction. A middle portion of the upper lever 36 is connected and fixed to the upper support shaft 35, and a middle portion of the lower lever 37 is connected and fixed to the lower support shaft 35.

  As shown in FIGS. 2 and 4, one end of the pair of upper and lower levers 36 and 37 protrudes inward in the width direction from the upper and lower surfaces of one transport rail 4, and the end frame is made of a thin plate material on the end surface. An upper chuck 38 and a lower chuck 39, which are formed long along the conveyance direction 1 and constitute the chuck mechanism, are attached and fixed.

  The tip portions of the upper chuck 38 and the lower chuck 39 located on the supply magazine 7 side are set to height dimensions that can enter the upper surface side and the lower surface side of the lead frame 1 accommodated in the supply magazine 7. ing. That is, as shown in FIG. 3, the tip portions of the upper chuck 38 and the lower chuck 39 are formed in chopstick-shaped sandwiching portions 38a and 39a.

  As shown in FIG. 3, a tension spring 41 is stretched between the other ends of the pair of upper and lower levers 36 and 37. An upper cam follower 42 and a lower cam follower 43 are rotatably provided on the other end surfaces of the upper and lower levers 36 and 37, respectively.

  An opening / closing cam 44 is provided between the pair of cam followers 42 and 43. The opening / closing cam 44 is rotationally driven by an opening / closing motor 45. When the pair of cam followers 42 and 43 are positioned at a pair of top dead centers provided at intervals of 180 degrees in the circumferential direction of the opening and closing cam 44, the upper lever 36 and the lower lever 37 have the support shaft 35 as a fulcrum and the other end of FIG. Is driven in the approaching direction indicated by the arrow, that is, in the closing direction, and is driven in the opening direction when positioned at a pair of bottom dead centers 90 degrees away from the top dead center in the circumferential direction.

  As a result, the clamping portions 38a and 39a at the tips of the upper chuck 38 and the lower chuck 39 provided at the other ends of the levers 36 and 37 are closed in a state of entering the supply magazine 7 as shown by a chain line in FIG. When driven, the leading end portion of the lead frame 1 accommodated in the supply magazine 7 and positioned at a predetermined height by the chucks 38 and 39 is clamped.

  Therefore, if the feed motor 33 is operated with the chucks 38 and 39 sandwiching the leading end of the lead frame 1 to drive the movable body 27 in the forward direction, that is, the lead frame 1 feed direction, the lead frame 1 Can be pulled out from the supply magazine 7 to the transport rail 4 of the feeder 3.

  One end portion in the width direction of the lead frame 1 drawn out from the supply magazine 7 to the transport rail 4 is the end in the width direction of the feeder 3 opposite to the chucks 38 and 39 as shown in FIGS. It enters between the lower roller 46 and the upper roller 47, which constitute the detection means, arranged in the section.

  When the lead frame 1 enters between the lower roller 46 and the upper roller 47, these rollers 46 and 47 rotate in the direction indicated by the arrow in FIG. The upper roller 47 is attached to the detection shaft 49 of the rotation detector 48. The rotation detector 48 generates power when the detection shaft 49 rotates, and the upper roller 47 is rotated by the lead frame 1 with the power, that is, the lead frame 1 is a pair of chucks 38. , 39 is detected from the supply magazine 7.

  The electric power generated by the rotation detector 48 is output to the control device 51 as a detection signal as shown in FIG. The control device 51 controls driving of the feed motor 33 and the opening / closing motor 45.

  Then, the opening / closing motor 45 is operated by the control device 51 so that the pair of chucks 38 and 39 is closed, and the pair of chucks 38 and 39 operates the feed motor 33 in a direction in which the lead frame 1 is pulled out from the supply magazine 7. At this time, it is detected whether or not a detection signal is input from the rotation detector 48 to the control device 51 in synchronization with the operation of the motors 45 and 33.

  In other words, when the holding portions 38a and 39a of the pair of chucks 38 and 39 are driven in the closing direction, and when the lead frame 1 is driven out in the direction in which the lead frame 1 is pulled out from the supply magazine 7, the control device 51 causes the lead frame 1 to move. Is detected from the supply magazine 7 by the presence or absence of a detection signal from the rotation detector 48.

According to the thus configured mounting apparatus, the lead frame 1, which is accommodated in the supply magazine 7 of the supply device 8, the distal end portion is clamped by the clamping portion 38a, 39a of the pair of chucks 38 and 39 of the drawer mechanism 25 Can be pulled out.

  Therefore, the lead frame 1 can be smoothly transferred from the supply magazine 7 to the feeder 3 without being bent and deformed as in the prior art in which the lead frame 1 is pushed out from the supply magazine 7 by a pusher.

  In particular, when the lead frame 1 is in the form of a very thin film, it may not be possible to push out from the supply magazine 7 by a pusher. However, the lead frame 1 is clamped by the clamping portions 38a and 39a of the chucks 38 and 39 and pulled out. Accordingly, the lead frame 1 can be reliably pulled out and delivered to the feeder 3 without being bent from the supply magazine 7.

  The lead frame 1 drawn out from the supply magazine 7 by the pair of chucks 38 and 39 passes between the lower roller 46 and the upper roller 47 and rotates these rollers 46 and 47. The rotation of the upper roller 47 is detected by the rotation detector 48, and the detection signal is output to the control device 51.

  When the detection signal from the rotation detector 48 is input, the control device 51 can perform the above operation as long as the chucks 38 and 39 are driven in the feed direction of the lead frame 1 with the tip portion of the lead frame 1 sandwiched therebetween. When the detection signal is input, it is determined that the lead frame 1 is pulled out from the supply magazine 7. Thereby, the control device 51 continues the operation without stopping the operation of the mounting device or outputting an alarm.

  That is, the detection of the lead frame 1 is performed by detecting the detection signal from the rotation detector 48 and the driving of the pair of chucks 38 and 39 by the feed motor 33 and the opening / closing motor 45 in synchronization with each other. Only when an attempt is made to supply the battery, it is detected whether or not the supply has been performed reliably.

  On the other hand, when it is determined by the control device 51 that the lead frame 1 has not been reliably pulled out from the supply magazine 7, the control device 51 stops the operation of the mounting device by issuing an alarm and informing the operator. . As a result, the occurrence of defective products is minimized.

  In the above embodiment, the pair of chucks draws the lead frame from the supply magazine and transfers it to the feeder. However, if the drive range of the pair of chucks along the guide rail is expanded, the chuck simply removes the lead frame. In addition to delivering to the feeder, the lead frame can be transported along the feeder to a desired position.

  In addition, the drawer mechanism having the above-described configuration may be provided in front of the collection magazine, and the lead frame conveyed along the conveyance rail may be sandwiched between a pair of chucks and stored in the collection magazine. In that case, the drawer mechanism is used as a storage mechanism for storing the lead frame in the recovery magazine.

  Further, the transport mechanism for transporting the lead frame may use a conveyor instead of the guide rail. Further, the lead frame may be held by a pair of upper and lower rollers instead of the pair of upper and lower chucks, and the lead frame may be conveyed by rotating the rollers.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram of the mounting apparatus which shows one embodiment of this invention. The top view which shows the edge part of the feeder by which the supply magazine and the supply apparatus are arrange | positioned. The front view of the said supply apparatus. The side view of the said supply apparatus. Explanatory drawing which shows the state which the clamping part of a pair of chuck approached into the supply magazine. Explanatory drawing when a lead frame pulled out from the storage magazine enters between the lower roller and the upper roller. The block diagram which shows a control system.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Lead frame, 2 ... Chip | tip (electronic component), 3 ... Feeder (conveyance means), 8 ... Feeder, 16 ... Mounting stage, 25 ... Drawer mechanism, 33 ... Feed motor, 38 ... Upper chuck, 39 ... Lower chuck , 46 ... lower roller, 47 ... upper roller, 48 ... rotation detector, 51 ... control device.

Claims (5)

A supply device for supplying a flexible plate-shaped member,
A supply unit in which the flexible plate-like member is slidably stored;
A drawer mechanism for pinching and pulling out the tip of the flexible plate-like member housed in the supply unit;
A rotating body that rotatably contacts the flexible plate-like member drawn from the supply unit by the pull-out mechanism;
And a detecting means for detecting that the flexible plate-like member is pulled out from the supply section by the rotation of the rotating body.   The drawer mechanism includes a pair of openable and closable chucks that sandwich the flexible plate member housed in the supply unit, and a drive mechanism that drives the chucks in the pulling direction of the flexible plate member. 2. The flexible plate-like member supply device according to claim 1, wherein the supply device is a chuck mechanism.   The apparatus for supplying a flexible plate member according to claim 2, wherein the detecting means detects whether or not the rotating body has rotated in synchronization with the operation of the drive mechanism.   Both ends of the supply portion are open, and a plurality of the flexible plate-like members are accommodated and held in the vertical direction so as to be slidable at predetermined intervals, and are provided so as to be driven in the vertical direction by a vertical drive mechanism. 2. The flexible plate-like shape according to claim 1, wherein the chuck mechanism sandwiches a leading end portion of a flexible plate-like member positioned in the vertical direction by the vertical drive mechanism and pulls it out from the supply portion. Member supply device. A mounting device for mounting an electronic component on a flexible plate-shaped member,
Conveying means for conveying the flexible plate member;
A supply device for supplying the flexible plate-like member to the conveying means;
A mounting device for mounting an electronic component on the flexible plate-like member which is conveyed to a conveying means by the supply device and positioned at a predetermined position;
An electronic component mounting apparatus according to claim 1, wherein the supply apparatus has the structure described in claim 1.

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