JP3304569B2 - Transfer rail mechanism with discharge shooter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer rail mechanism with a discharge chute used in a lead processing machine.

[0002]

2. Description of the Related Art When manufacturing a semiconductor device of a resin mold type, a semiconductor chip is mounted on a lead frame and resin-molded.
Required processing such as lead tip cutting and lead forming is performed. The lead processing machine is an apparatus for performing such lead forming after resin molding. When processing with a lead processing machine, it is common to use multiple dies, but in that case, transport and process as a strip-shaped lead frame and finally separate it into individual pieces, After lead cutting and dam bar cutting, the product portion may be separated from the lead frame into individual pieces, and the separated individual pieces may be transported and bent. The reason for adopting such different transport method is that when transporting the lead frame as it is, it can be transported with a simple transport device because the rail part can be used at the time of transport operation, whereas with a hanging pin This is because a product that does not hang the rail portion and the product portion may not be conveyed unless separated into individual pieces when bending the lead.

FIGS. 19, 20, and 21 are explanatory views showing the structure of a conventional lead processing machine. FIG. 19 shows an apparatus in which a pin is inserted into a rail hole of a lead frame in the form of a strip and fed in order to perform bending. In this device, the lead frame 5
Are sequentially supplied to the first die 7 and the second die 8 on the gantry 6 from the left side of the apparatus and processed. The feed unit 10 that feeds the pins by inserting the pins into the rail holes is positioned parallel to the mold row. After bending, the product is separated into individual pieces 11 in the final step, carried out of the mold, and stored in the storage section 12. The unnecessary frame after being separated into pieces 11 is discharged out of the mold as it is and falls. Depending on the relationship between the number of processing steps and the number of lead frames, three or more dies such as three dies, four dies, and five dies may be arranged and processed. This processing machine is DIP, ZI
Used for all products with hanging pins such as P, SOJ, PLCC.

FIG. 20 shows a processing machine in which a mold 7 and a mold 8 are arranged in a direction perpendicular to the supply direction of the lead frame 5. After processing such as cutting and finally separating into individual pieces, the individual pieces are carried out from the mold 7 in a direction orthogonal to
The individual pieces are sequentially fed by the second die 8 for processing. In the second die 8, the individual pieces are slid on a die by a feed bar 14 and sequentially fed, and the leads are sequentially bent and then stored in the storage section 12. The unnecessary frame 15 is discharged from the mold 7 as it is. A feed bar transport unit 16 is provided parallel to the second die 8. This processing machine is used for products in which external leads such as DIP, ZIP, SOJ, and SOP are provided in one direction or two directions.

[0005] Fig. 21 is a diagram showing a direction perpendicular to the conveying direction of the mold 7, after the mold 7 is conveyed as it is in a lead frame, subjected to processing such as dam bar cutting and lead tip cutting, and finally separated into individual pieces. The individual pieces 11 are unloaded to the second mold 17, the third mold 18,
This is an example in which the individual pieces 11 are suction-transported and processed into the fourth mold 19.
The suction transfer unit 20 is provided in parallel with the second mold 17, the third mold 18, and the fourth mold 19. This apparatus requires the same number of dies as the number of bending steps. This processing machine is used for products having external leads provided in four directions, such as QFP and PLCC.

[0006]

As described above, in the conventional lead processing machine, a plurality of dies are set in the processing machine, and the workpiece is transported between the dies and processed. Therefore, a mechanism for transferring the workpiece between the dies is necessary. However, as shown in FIG. 19, in the case of an apparatus for transferring and processing the lead frame as it is between the dies, the width of the lead frame is set between the dies. There is a method in which a rail mechanism is provided to change a width interval in accordance with the distance and is delivered. However, when only the rail mechanism is provided as in this conventional apparatus, it can be used only when using a die of a type in which the lead frame is transported as it is in the former and latter dies. It is not possible to use it after transferring it to the die in the subsequent stage. On the other hand, in the case of an apparatus that separates the workpieces into individual pieces in the former mold and transfers the workpiece to the latter mold, FIG.
As shown in FIG. 21 and FIG. 21, there is a limitation on the mold setting such that a mold arrangement having a discharge space on the discharge side of the unnecessary frame must be provided. In some cases, a defect of the lead frame is found during the processing of the lead frame. In such a case, the conventional apparatus has to continue the processing as it is, and the processing is useless. There were also problems. Therefore, the present invention has been made in order to solve these problems, the purpose of which is to allow the transfer of the lead frame between the dies, it is excellent in handleability of the set of dies and the like, An object of the present invention is to provide a transport rail mechanism with a discharge shooter that can easily discharge defective lead frames.

[0007]

The present invention has the following arrangement to achieve the above object. That is, in an inter-die transport rail mechanism of a lead processing machine installed in the middle of a plurality of dies set in a processing machine, a pair of guides variably supported in a width direction while guiding a rail portion of a lead frame as a workpiece. A movable rail, a drive mechanism for moving and adjusting the movable rail in the width direction in accordance with the width size of the workpiece, and a middle part in the width direction of the movable rail, the lower than the transport height of the workpiece. A discharge shooter mechanism having a discharge shooter that moves up and down between a retracted position and an upper position for introducing and discharging an unnecessary frame or the like at a position at which the workpiece is transported is provided. Further, a vertical movement mechanism is provided which guides and supports the movable rail so as to be movable in a vertical direction, and retracts the movable rail to a lower position which does not hinder the mold replacement when the mold is replaced and set. . Further, a control unit for moving the discharge chute up and down according to the processing content of the former die is provided.

[0008]

[Function] When a workpiece is transported between dies or between devices with the lead frame as it is, the width of the movable rail is adjusted by a drive mechanism according to the width of the lead frame, and the lead frame is guided by the movable rail. And transport. By retracting the movable rail to the lower position by the vertical movement mechanism, the mold can be easily set on the processing machine. If a defect of the workpiece is found in the former die, the discharge chute is raised to an upper position, and the unnecessary frame can be discharged in the middle of the processing line.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a transport rail mechanism with a discharge chute according to the present invention will be described as applied to a general-purpose lead processing machine. (Overall configuration of general-purpose lead processing machine) FIGS. 1 and 2 are explanatory views showing the overall configuration of a general-purpose lead processing machine. FIG. 1 shows a state in which the general-purpose lead processing machine is viewed from above, and FIG. Is shown. The outline of the overall configuration of this apparatus is as follows. This apparatus stores a lead frame supply mechanism A for supplying a lead frame after resin molding to a processing stage, a processing stage B for processing a lead frame, and a product after processing. And a storage mechanism C to be used. The supply mechanism section A, the processing stage section B, and the storage mechanism section C of these lead frames are arranged in a line, and the workpiece is supplied from the supply processing section A of the lead frame to the processing stage B and processed. It is stored in part C.

The supply mechanism section A of the lead frame chucks the resin-molded lead frames stacked and stored in the magazine one by one and transfers them to a predetermined position of the processing stage section B. The lead frame stored in the magazine is pushed up from below by a lifter installed below the magazine in accordance with the chucking operation, and is supplied in order from the top. In FIG. 2, 30 is a chuck, 31 is a cylinder for moving the chuck 30 up and down, 32 is a belt for moving the chuck 30 laterally, 33 is a rail for transferring the lead frame,
Reference numeral 34 denotes a support for the magazine.

Since the length and width of the lead frame differ depending on the product, the magazine for accommodating the lead frame has different sizes. The supply mechanism A of the lead frame of the present apparatus is arranged so that the center position of the lead frame housed in the magazine in the width direction and the length direction of the chuck 30 can be used for general-purpose magazines of different sizes. The magazine was set so as to match the center position, and the center position of the lead frame was chucked so that the lead frame could be transferred onto the rail 33.
The width of the rail 33 is variable according to the width of the lead frame, and the rail 33 can be supplied to the processing stage B with reference to the center position of the lead frame in the width direction.

In the processing stage B, the lead frame supplied from the lead frame supply mechanism A is processed while being sequentially fed on each processing stage of the die. In this apparatus, the mold 40 is arranged on the supply side of the lead frame,
And the second mold 42 is arranged at a slight interval. The first mold 40 and the second mold 42 are set on the press device by a free shank method, and can be separately attached to and detached from the press device. The first mold 40 and the second mold 42 are individually manufactured depending on the product, but the height and the like of the mold at the time of setting are common so that they can be commonly set in the press device. Both the mold 40 and the mold 42 can be set whether they are a die for progressively feeding and processing a strip-shaped lead frame, or a die for feeding and processing individual pieces sequentially. is there. The configuration in which these dies can be set for general use will be described later.

The processing stage section B of the present apparatus enables both a method of processing a workpiece by sequentially feeding a strip-shaped lead frame as it is, and a method of sequentially feeding an individual piece separated from the lead frame. A rail mechanism for transferring the lead frame to the second die 42 between the first die 40 and the second die 42; a discharge shooter 44 for discharging unnecessary frames discharged from the first die 40; A pickup mechanism for transferring individual pieces separated from the mold to the mold 42 is arranged. In FIG. 2, reference numerals 46 and 48 denote press devices for driving the first die 40 and the second die 42, respectively.

The products processed and discharged by the processing stage B are sequentially stored in storage trays arranged in the storage mechanism C. In this apparatus, the product discharged from the mold 42 by the XY drive stage 50 is suction-supported and stored in the storage tray. In FIG. 2, reference numeral 52 denotes a storage pickup head attached to the XY drive stage 50, and reference numeral 54 denotes a storage tray for storing products. The storage tray 54 is set in the apparatus in a state of being stacked and stored on the carrier, and the products are aligned and stored by the XY drive stage 50 in a state of being set at the storage position one by one.

The lead processing machine of the present apparatus arranges the lead frame supply mechanism section A, the processing stage section B, and the product storage mechanism section C in series as described above, and from the position for supplying the workpiece, the processing after processing is performed. The machine is made compact by transporting and processing the workpiece linearly to the position where the product is taken out, making it possible to set the workpiece and attach or remove the processing mold. All can be performed on the front of the device, and can be provided as a convenient device. Although this device is mainly configured as a strip-shaped lead frame as a workpiece, the processing operation section of the reel-shaped or individual-shaped lead frame can be changed by slightly changing the supply side and the storage side. B can be used without change.

(Structure of the processing stage section) The general-purpose lead processing machine of the present apparatus arranges the first die 40 and the second die 42 in series, and separates the workpiece into a lead frame by sequentially feeding and processing. The processing stage can be selected and enabled in either case. However, the feature of the configuration for this is the configuration of the processing stage B. Hereinafter, the configuration of the processing stage B will be described in detail.

FIG. 3 is a perspective view of the processing stage B.
The first mold 40 and the second mold 42 are provided on a base 60 of the press machine.
A press ram 62 which is set on the top and driven separately by pushing,
64 is engaged by a free shank method. Type 40
The second die 42 slides on the base 60 from the front side to the rear side of the device and pushes it into engagement with the press rams 62 and 64 to be driven. Type 40
And dimensions when the second mold 42 is set, press rams 62 and 6
By sharing the height position of the engaging portion with the unit 4, the entire product can be exchanged and set as a mold unit.

The present apparatus is an example in which a mold for feeding and processing a lead frame as a die 40 and a die for feeding and processing an individual piece as a die 42 are provided. These type 40
The two dies 42 are provided with a plurality of processing stages, and the workpiece is sequentially fed to each processing stage and processed. As a method of transporting the workpiece, a method of sequentially feeding the lead frame as it is, a method of transporting by a feed arm provided with a feed pin, and a method of sequentially feeding the individual pieces by suctioning the individual pieces with a suction pad and transporting them There is a method of putting pieces individually in a feed bar pocket and feeding them sequentially.

The feed arm reciprocates by one pitch of the processing stage and feeds the lead frame by a fixed length. When the lead frame is carried, a feed pin is inserted into a rail hole provided in a rail of the lead frame to carry the lead frame. By doing so, it is accurately positioned and transported. Also,
In the case where the individual pieces are sucked and conveyed by the suction pad, the individual pieces are also sucked or fed into the pocket and moved forward by one pitch in the case of the feed bar.

Since the feed pitch on the mold varies depending on the product, in order to be able to use it versatilely, it is necessary to allow the mold to perform a required pitch feed when set in a processing machine. For this reason, in this apparatus, a movable portion used for transporting a workpiece such as a feed arm is provided on the mold side according to the size of the product, and a feed drive mechanism for reciprocating the movable portion is provided on the main body side of the processing machine. It was configured as follows.

(Feeding Driving Mechanism of Workpiece) FIG. 4 shows a feeding driving mechanism installed on the base 60. The feed drive mechanism is provided with a separate and independent feed drive mechanism for each of the first mold 40 and the second mold 42. In addition, the drive mechanisms to be arranged are shared so that the dies having different transporting methods can be used in common, so that any dies can be exchanged and set at the respective positions of the first die 40 and the second die 42. ing. Also,
The feed drive mechanisms provided in each mold are controlled so as to be driven synchronously during operation.

The feed drive mechanism is a mechanism for pushing a movable portion such as a feed arm installed on a mold in a direction parallel to the transport direction and a direction to retract the movable portion in order to reciprocate the movable portion parallel to the transport direction of the workpiece. Having. In FIG. 4, 70a and 70b are cylinders for pushing the movable portions of the first mold 40 and the second mold 42 in the forward direction, and 72a and 72b are pushers for pushing the movable portions in the backward direction. The push rods of the cylinders 70a and 70b and the pushers 72a and 72b are arranged to face each other at the same height position, and the ends of the push rods are provided with pads 71a and 71 for pressing the movable part with cushioning properties.
b, and the pushers 72a and 72b are formed by a shock absorber method.

The pushers 72a and 72b are pushed by a motor drive using a ball screw. 74a, 74b
Are motors, 76a and 76b are ball screws, 78a and 78
b is a ball screw nut, and ball screws 76a, 76
b are driven by belts 80a, 80b by motors 74a, 74b.
b, and the ball screw nuts 78a, 78b are connected to the pushers 72a, 72b via slide guides 82a, 82b.
b. The slide guides 82a and 82b are guides for moving the pushers 72a and 72b in parallel to the direction of transport of the workpiece, and the ball screws 76a and 76b are installed so that their axes are parallel to the slide guides 82a and 82b. .

As described above, the feed drive mechanism for the workpiece comprises the cylinders 70a and 70b, the pushers 72a and 72b, and the drive mechanisms such as the motors 74a and 74b. The movable parts such as the feed arm are brought into contact with the pushers 72a and 72b, and the feed control is performed by controlling the positions of the pushers 72a and 72b by the motors 74a and 74b. When the movable portion is returned to the original position, the pushers 72 are driven by the motors 74a and 74b.
a, 72b in the backward direction.
Thus, the cylinders 70a, 70b and the motor 74a,
By activating 74b, the workpiece can be fed forward.

In this apparatus, the motor is driven using ball screws 76a and 76b as a feed drive mechanism.
When driven by the ball screws 76a and 76b in this manner, the positions of the pushers 72a and 72b can be accurately controlled, and the workpiece can be accurately stopped at an intermediate position where the workpiece is transported. become. That is,
Since the positions of the pushers 72a and 72b can be set by controlling the rotation of the ball screws 76a and 76b, when the movable parts on the mold side are advanced by the cylinders 70a and 70b,
By setting the positions of the pushers 72a and 72b to the intermediate positions, it becomes possible to divide and send the entire range in which the workpiece is transported. In addition, it is possible to perform positioning at an intermediate position also on the return path.

FIG. 5 shows the lower mold of the mold 40 as viewed from the plane. A plurality of processing stages 90 are provided on the lower mold surface, and a pair of feed plates 92a and 92 for guiding and transferring rails of a lead frame to both sides of the processing stage 90.
b is provided. The lead frame 100 after resin molding, which is a workpiece, inserts the edge of the rail portion from one end of the mold 40 into a groove provided over the entire length on the opposing inner surfaces of the feed plates 92a and 92b. Supplied. In addition, a lowering mechanism 93 is provided at both ends of the feed plates 92a and 92b, and the feed plates 92a and 92b are forcibly pushed down during press working.

Reference numerals 94a and 94b denote feed arms for sequentially feeding the lead frame 100 on the lower die. One feed arm is disposed on each of the entrance side and the discharge side of the lead frame 100 so as not to interfere with the processing stage 90. Feed arm 94a, 94
On the lower surface of b, feed pins 9 are directed downward in accordance with the installation positions of the rail holes provided in the rails of the lead frame 100.
5 is erected. The feed pin 95 is the lead frame 10
When the lead frame 100 is advanced, the lead frame 100 enters the rail hole, and the lead frame 100 is conveyed in this state, whereby the lead frame 100 is accurately advanced to the next processing stage 90.

The feed arms 94a and 94b are fixed to the connecting bar 96 with an appropriate distance between them for each product, the arm horizontal holding plate 97 is fixed to the connecting bar 96, and the arm horizontal holding plate 97 is moved downward. The guide is supported by a slide guide attached to the outer surface of the mold. The slide guide is connected to the feed arm 94 via the arm horizontal holding plate 97.
a and 94b are guided to reciprocate in parallel with the feed direction of the lead frame 100. Reference numeral 98 denotes an abutment block provided to project from the outer surface of the arm horizontal holding plate 97 to the back side. When the die is set at a predetermined position on the base 60, the abutting block 98 is set at the same height as the intermediate position between the cylinder 70a and the pusher 72a, which is a feed drive mechanism for the workpiece.

Reference numerals 101 and 102 denote feed arms 94.
a, 94b are stoppers for restricting the forward and backward positions of the feed arm 94a. The stopper 101 is located at the retracted position of the feed arm 94a, and the stopper 102 is moved downward to abut the outer surfaces of these base positions at the forward position of the feed arm 94b. Provide in the mold. The stoppers 101 and 102 may be regulated by a plate-like member, or may be configured to be regulated by a shock absorber system. By defining the installation positions of the stoppers 101 and 102, a required movement stroke can be set for each die. Since the stopper is provided on the mold side, the feed drive mechanism may be somewhat rough. The cylinder 70a and the pusher 72a of the workpiece feed drive mechanism alternately push the end faces of the abutting blocks 98 in opposite directions to thereby feed the arms 94a, 94a.
b is reciprocated, and its movement position is the stopper 101,
Restricted by 102, accurate sizing is possible.

The type 40 of the present apparatus is a lead frame 100.
Are sequentially fed to drop resin, and after lead cutting and the like are performed, separated into individual pieces. The separated pieces are transferred to the second mold 42, but a mechanism is provided for sucking the individual pieces and transporting them in the second mold 42 direction in order to move the separated pieces in the second mold 42 direction. In FIG. 5, reference numeral 103 denotes a carry-out arm for sucking and supporting individual pieces and discharging the pieces in the direction of the mold 42. Unload arm 103
Is guided and supported on the front side of the lower die so as to reciprocate in parallel with the feed direction of the feed arms 94a and 94b, and is reciprocally driven in connection with the air cylinder 104. Unloading arm 10
Reference numeral 3 denotes a lower die, which has a front end extending to a position above a final processing stage which is separated into individual pieces, and a suction pad 105 for sucking the individual pieces by air is provided on the upper surface thereof.

The carry-out arm 103 moves laterally at a position slightly higher than the height of the feed arm 94b so as not to interfere with the feed arm 94b on the discharge side, and moves beyond the feed arm 94b to the discharge side of the mold 40. It is configured so that individual pieces can be moved. The upper die is provided with a knockout and a punch for supporting the workpiece between the lower die and the lower die, but as a mechanism for sucking and supporting the individual pieces separated from the lead frame 100, an air flow path is formed inside and a lower end is formed at the lower end. A rod provided with a suction pad is vertically movable.

The product separated into individual pieces at the final processing stage of the mold 40 moves upward together with the upper mold after being sucked by the suction pad provided on the rod of the upper mold. The sheet is conveyed in the discharge direction by 94a and 94b. The carry-out arm 103 moves into the mold from the discharge direction while the upper mold moves upward, stops at a position immediately below the individual pieces supported by the upper mold, and the upper mold rod descends to eject the individual pieces adsorbed. It is delivered by being sucked to the suction pad 105 on the arm 103. The individual pieces sucked and supported by the unloading arm 103 are separated by the air cylinder 104 into the unloading arm 10.
3 is moved out in the forward direction.

The machining operation by the mold 40 described above will be described. The lead frame 100 supplied from the left end of the mold 40 is in a state where the feed plates 92a and 92b are at the upper position, that is, the lead frame 100 is The feed pin 95 engages with the rail hole in a state slightly separated from the feed arm, and the feed arm 94a, 94b is pushed by the cylinder 70a of the feed drive mechanism, and the feed arm 94a, 94b is sequentially fed, and the feed plate 92a, 92b descends at the feed position. It is driven and press processing is performed between the upper die and the lower die.
The feed arms 94a and 94b are retracted to their original positions by the drive of the feed drive mechanism by the ball screw 76a during the press working, and are ready for the next conveyance.

The lead frame 100 is sequentially fed on the processing stage as described above, and is separated from the lead frame 100 into individual pieces at the final stage. The separated pieces are carried out in the discharge direction by the carry-out arm 103, and the unnecessary frame is directly moved on the lower mold in the discharge direction and discharged.
The mold 40 is of a type that separates into individual pieces at the final stage. However, in the case of a mold that does not separate the product part into individual pieces as the mold 40, the mold 40 is in the form of a strip-shaped lead frame. It is conveyed to the 42 side. In this case, the mold is not provided with the unloading arm 103 for unloading the individual pieces or the mechanism for sucking the individual pieces by the upper mold.

FIG. 6 shows the lower mold of the mold 42 as viewed from the plane. The second die 42 is a die which is different from the first die 40 in that individual pieces obtained by separating the product portion from the lead frame are sequentially fed one by one. 110
Is a processing stage provided in the lower mold, and three processing stages are provided in this apparatus. In a mold that transports and processes a workpiece as it is in a lead frame as in the first die 40, the workpiece is guided and transported by a feed plate. In the second die 42, the feed plates 111a and 111b are vertically driven. It does not guide the workpiece.

The individual pieces 120 to be processed are sequentially processed through the respective processing stages from the entry end side, and the individual pieces 120 on each of the processing stages 110 are suction-supported at once by the suction pad, and are processed at the next processing stage. It is transported to 110. The mold of the present apparatus is provided with a frame-shaped feed arm 112 in which a portion corresponding to the processing stage 110 is opened in a rectangular shape so as not to hinder the processing in each processing stage 110, and a suction pad 114 is attached to the feed arm 112. Individual pieces 12
0 was conveyed.

The working stage 110 is provided on the feed arm 112.
Slide portions are provided on both sides in the width direction to guide reciprocation in parallel with the conveying direction of the piece 120, and the support plate 112a is bridged between the opposing slide portions.
The suction pad 114 is attached to the lower surface of the device downward. In this apparatus, four support plates 112a were provided, and the suction pads 114 were attached to each support plate 112a. Each suction pad 11
4 is connected to the air suction mechanism.

The slide portion of the feed arm 112 is guided and supported by a slide guide 116 provided on the feed plates 111a and 111b. FIG. 7 shows the feed arm 112.
Shows a side view in which the guide is supported by the slide guide 116. The feed arm 112 is also the feed arm 94 of the mold 40.
A reciprocating drive is performed by a feed drive mechanism installed on the main body side of the processing machine as in the case of a and 94b. Therefore, the feed arm 1
The arm 112b extends rearward from 12, and the end of the arm 112b extends downward along the outer surface of the lower mold, and the block 122 is attached outward to the lower end of the arm 112b. The abutment block 122 is mounted in accordance with the height of the cylinder 70b and the pusher 72b, but a slide guide 124 is attached to the outer surface of the lower die to guide the abutment block 122, and the abutment block 122 is attached to the slide guide 124. Guide support.

As shown in FIG. 7, the individual pieces 120 are sucked and transported by the suction pads 114. In the transport state, the individual pieces 120 are slightly separated from the surface of the processing stage 110, and are moved to the next processing stage 110. Then, the feed arm 112 moves down and operates so as to place the piece 120 on the processing stage 110. For this reason, the feed plates 111a and 111b are supported by the lower die so as to be able to move up and down, and move up and down by being linked to an up and down drive mechanism. In addition,
The feed arm 112 is guided and supported by the slide guide 124 in the lateral direction, and at the same time, is guided in the vertical direction by the groove engagement.

The feed arm 112 is moved forward and backward by the cylinder 70b and the pusher 72b, which are provided on the main body side of the processing machine, contacting and pushing the side surface of the abutment block 122, thereby reciprocating. Therefore,
By restricting the movement range of the feed arm 112 by the stopper, a required feed stroke can be set for each product and a required fixed-size feed can be performed.

The processing operation by the second die 42 will be described. First, when the individual piece 120 as the workpiece is supplied to the lower die, the suction pad 114 at the forefront of the feed arm 112 is attached to the package of the individual piece 120. It moves backward to a position corresponding to the center position of the upper surface. At this time, the suction pads 114 are also located at the center positions of the individual pieces 120 on the respective processing stages 110.
a and 111b are moved down, and the individual pieces 120 are sucked by the suction pad 114. Next, the feed plate 111a,
111b, the feed arm 112 is fed by a fixed pitch for one pitch, and at that position, the feed plates 111a,
1b is lowered, the suction by the suction pad 114 is released, and the individual pieces 120 are set on the processing stage 110.
The feed plates 111a and 111b are urged upward, and are configured to be forcibly moved downward by a driving mechanism such as a lowering mechanism 93.

After the individual pieces 120 are set, the supporting plate 112a for supporting the suction pads 114 is used for press working.
The feed arm 112 is slightly retracted so that the position of the feed arm 112 is at an intermediate position of each processing stage 110. In this way, the working stage 110 becomes an empty space, and working is performed by pressing the upper die and the lower die. After the processing, the next processing is performed by the next feeding operation in the above cycle. As described above, the press working can be continuously performed by controlling the feed arm 112 and the like.

As shown in FIG. 3, the lead processing machine of this apparatus has a first die 40 and a second die 42 arranged in series, and performs processing by the second die 42 following processing by the first die 40. However, since the transport operation is performed in each mold by the workpiece feed drive mechanism provided on the main body side of the processing machine as described above, the feed drive mechanisms acting on the mold 40 and the mold 42 are connected as a whole. Type 40 and type 4
2 is continuously performed. In this device, the feed drive mechanism has the same structure for the set part of each mold so that the mold can be appropriately replaced and used even when processing different types of products,
A part different depending on the product, such as a fixed-size feed width, can be generally used for different kinds of products by giving it to the mold side.

(Example of Configuration of Another Die) FIGS. 8, 9 and 10 show examples of a die for processing a workpiece by a fixed length using a feed bar. Here is an example of a type.
FIG. 8 is a plan view of the lower die, in which processing stages 130 are provided at regular intervals on the die surface. The feed bar 132 for transporting the workpiece is an elongated plate-shaped member as shown in FIG. 9, and is slidably disposed in a slit hole provided over the entire length of the lower die. At the upper edge of the feed bar 132, a pocket 132a is provided for engaging the lower surface of the package portion of the workpiece. The pockets 132a are provided at the same intervals as the installation intervals of the respective processing stages 130 according to the number of the installation of the processing stages 130. The number of the pockets 132a is the number of processing stages + 1.

The feed bar 132 is provided so as to be able to move up and down and forward and backward with respect to the mold surface.
The workpiece is placed on 2a and is fed by a fixed pitch for one pitch, and the workpiece is fed forward by an operation combining vertical movement and forward / backward movement of retreating to the original position at the lower position. For this purpose, feed plates 134a and 134b that are driven in the vertical direction are provided on both sides of the processing stage 130, and slide rods 136a and 136b are guided and supported on the lower surfaces of the feed plates 134a and 134b in parallel with the transport direction. A connecting plate 138a is provided at each end of the 136b.
138b is fixed, and both ends of the feed plates 134a, 134b are fixed to the connecting plates 138a, 138b, and the feed plates 134a, 134b are supported in the longitudinal direction.

The feed bar 132 is connected to the slide rod 13.
The reciprocating motion of the slide rods 136a and 136b is performed by the reciprocating motion of the slide rods 136a and 136b. For this reason, the push arm 1 is positioned horizontally at the center in the longitudinal direction of one of the slide rods 136 toward the back side of the mold.
The support plate 142 is fixed downward to the end of the pushing arm 140, and the block 144 is fixed to the outer surface of the support plate 142 by abutting outward. The butting block 144 is installed at the same height as the cylinders 70a and 70b and the pushers 72a and 72b. Note that the support plate 142 is guided and supported by the slide guide 146 to guide the butting block 144 along the outer surface of the lower die.

As shown in FIG. 8, stoppers 148a and 148b with shock absorbers are arranged on both sides of the abutment block 144 in order to define the movable range of the abutment block 144. Butt block 14
When the abutment block 144 moves forward and backward, the side surface of the abutment block 144 abuts against the stoppers 148a and 148b, so that the movement position of the abutment block 144 is regulated and the movement stroke of the feed bar 132 is defined.

As shown in FIG. 3, this die is also set on a lead processing machine, so that the workpiece can be fed forward by feed bar transport to perform required processing. When the press operation is performed on the mold surface, the feed bar 132 is at a retracted position below the mold surface, and after the press process, the upper die rises and the feed plate 134a and 134b move upward. At the same time, the feed bar 132 is lifted, and supports the workpiece processed by each processing stage 130 so as to engage with the pocket 132a. Subsequently, the butting block 144 is pushed by the feed driving mechanism, and the stopper 14 is moved.
Stop when it contacts 8b. In this forward position, the feed bar 132 is driven to move downward, and the workpiece is transferred to the next stage.

After the feed bar 132 has been lowered into the lower mold, it is retracted from the lower position and returned to the original position to prepare for the next conveyance. The feed bar 132 is retracted by the feed drive mechanism of the processing machine, and stops when the abutment block 144 contacts the stopper 148a. Thus,
Forward and backward movement by feed bar 132 and feed plate 1
The workpieces are sequentially conveyed to the next processing stage 130 by the vertical movement of 34a, 134b, and are continuously processed.

(Workpiece Transfer Mechanism) As described above, in the lead processing machine of this apparatus, various types of dies can be set according to the product. It is necessary to be able to deliver the products in the first and second dies both in the case of processing with the lead frame as it is and in the case of processing with individual pieces. As described above, when a workpiece is transferred from Type 1 to Type 2 depending on the processing of the product, it can be delivered as a lead frame. It may be handed over to Type 2 in the state of becoming.

In order to enable the delivery operation as described above, in the processing machine of the present apparatus, a rail mechanism for guiding a rail portion of a lead frame between a type 1 and a type 2 as an embodiment of a transfer rail mechanism with a discharge shooter is provided. And a discharge shooter mechanism for discharging an unnecessary frame after being separated into individual pieces by one mold, and a pickup mechanism for transferring the individual pieces separated by one mold to two molds. FIGS. 11 and 12 are explanatory views showing the front arrangement and the plane arrangement of each component of the rail mechanism and the discharge shooter mechanism. In addition, the rail mechanism is used to transport and process the lead frame in both Type 1 and Type 2, and the discharge shooter mechanism is used to discharge unnecessary frame parts after separating them into individual pieces in Type 1. I do. Therefore, the discharge shooter mechanism is not used in the case of a set where the lead frame is transported and processed with the mold 1 and 2 and the rail mechanism is used when transferring individual pieces from the mold 1 to the mold 2. do not do.

(Rail mechanism) 150a, 150 in FIG.
Reference numeral b denotes a movable rail having a guide groove formed on an inner surface thereof for guiding a rail portion of a lead frame.
2 and are arranged facing each other. Movable rail 150a,
150b is variably supported so that the width interval can be adjusted, and has a feed plate 92 of the first die 40 and the second die 42.
a, 92b, 111a, and 111b. Movable rail 150a,
The mechanism for making the width interval of 150b variable is such that the screw shaft 152 is passed over the movable rails 150a and 150b in the width direction,
This is based on a method in which the screw shaft 152 is rotated by the electric motor 154. It should be noted that the movable rails 150a, 150b may be formed by a rack-pinion, belt, or the like other than the screw shaft.
Can be used as long as the required accuracy can be obtained as the stop position accuracy.

FIG. 13 shows a configuration in which the electric motor 154 makes the width interval of the movable rails 150a and 150b movable. The electric motor 154 includes a stepping motor,
Servo motors are preferably used. In the figure, reference numeral 156 denotes a fixed support plate that supports the rail mechanism. Fixed support plate 156
Is fixed to the base 60. The electric motor 154 is fixed on a fixed support plate 156 outside the movable rail 150a,
It is connected to the screw shaft 152 via the belt 158. On the fixed support plate 156, slide guides 160a and 160b for guiding the movable rails 150a and 150b in the width direction are provided.
The slide plates 162a and 162b are movably guided and supported in the width direction through the slide plates 162a and 162b.
Nut bodies 164a and 164b meshing with the screw shaft 152 are fixed on the a and 162b.

The screw shaft 152 has a nut body 164a,
Each of the movable rails 164b is formed so as to mesh with a reverse screw, and the rotation direction of the screw shaft 152 is changed.
The width interval between 50a and 150b can be adjusted. Since the movable rails 150a and 150b are fixedly supported on the inner surfaces of the support arms 166a and 166b provided upright on the slide plates 162a and 162b as shown in FIG. 13, the screw shaft 152 is rotated by the electric motor 154, and the slide is performed. By adjusting the distance between the plates 162a and 162b, the movable rails 150a and 150b
The width interval of can be adjusted.

The support arms 166a and 166b are provided with slide guides 168a and 168b for vertically moving the movable rails 150a and 150b, and the movable rails 150a and 150b are guided. As shown in FIG. 11, a feed plate 92 of a type 40 is provided on the lower surface of both ends of the movable rails 150a and 150b.
a, 92b and the feed plate 111a, 1
A locking plate 170 is provided to engage with the end of the movable rail 150a, 150b with the downward movement of the feed plates 92a, 92b, 111a, 111b.

Reference numerals 172 and 174 denote feed plate lowering mechanisms provided on the first die 40 and the second die 42, respectively. The lowering mechanism moves the feed plates 92a, 92b and the feed plates 111a, 111a,
11b is forcibly lowered. Movable rail 1
50a and 150b are feed plates 92a and 92b.
b, the lead frame can be accurately guided and transferred by vertically moving in conjunction with the vertical movement of the feed plates 111a and 111b. In addition, the movable rail 1
The operation of returning the 50a and 150b to the upper position depends on the resiliency of the spring 176 shown in FIG. Spring 17
A drive unit such as an air cylinder may be used instead of 8.

As described above, the rail mechanism of the present embodiment is arranged such that the movable rails 150a, 150
b, the movable rail 15
It is configured to be conveyed at the intervals of 0a and 150b, and can be generally used for different types of products.
Also, the feed plates 92a, 92b, 111a, 1
By moving the movable rails 11a and the movable rails 150a and 150b up and down in conjunction with each other, the workpiece can be continuously transferred between the first die 40 and the second die 42 to enable continuous processing.

When working, the movable rail 15
0a and 150b are engaged with the feed plates 92a and 92b of the mold 40 and the feed plates 111a and 111b of the mold 42 by the locking plate 170. However, when the mold is replaced, the movable rails 150a and 150b are engaged with the molds. It is necessary to release the engagement between the mold 40 and the mold 42 to facilitate the exchange set. Therefore, in the present apparatus, as shown in FIG. 11, the movable rails 150a, 150b
An air cylinder 179 is provided as a vertical movement mechanism for vertically moving the movable rail 150b.
The molds can be easily set by lowering a and 150b from the engagement positions.

(Discharge Shooter Mechanism) In FIG. 11, reference numeral 44 denotes a discharge shooter for discharging unnecessary frames discharged from the mold 40. The discharge chute 44 is connected to the movable rail 1.
It is installed at an intermediate position between 50a and 150b so as to be vertically movable.
The discharge shooter 44 is formed in a rectangular cylindrical shape, and has an introduction port for introducing an unnecessary frame on a surface where the unnecessary frame enters. 180 is an air cylinder that moves the discharge chute 44 up and down. As shown in FIG.
Is a lower position where the upper end is below the fixed support plate 156;
It is used by being set at one of the upper positions which are substantially at the same height as the positions a and 92b.

A discharge guide 182 is provided below the discharge shooter 44. The discharge guide 182 is provided to guide an unnecessary frame that enters and falls into the discharge shooter 44 to the scrap box. The discharge guide 182 is provided outside the discharge shooter 44, and its lower side is inclined toward the scrap box. In the case where the discharge chute 44 is processed as a lead frame between the first die 40 and the second die 42, the discharge shooter 44 is lowered to a lower position which is a retracted position so as not to hinder the operation of the movable rails 150a and 150b. When using a mold to separate the product part from the product, set it to the upper position and use it.

After performing the required processing on the lead frame,
In a mold that separates and processes a product portion into individual pieces, the supplied lead frames are successively conveyed and unnecessary frames are discharged. The discharge shooter 44 takes in the unnecessary frame discharged from the mold from the inlet, drops it into the discharge guide 182, and discharges it to the scrap box. As described above, by discharging the unnecessary frame between the first mold 40 and the second mold 42, the unnecessary frame can be easily discharged without affecting the arrangement of the molds of the first mold 40 and the second mold 42.

As another method of using the transfer rail mechanism with the discharge chute, when the workpiece is transferred from the first die 40 to the second die 42 as it is as a lead frame and processed, the first die 4 is used.
When the lead frame defect is found at 0, the discharge chute 44 retracted to the lower side of the movable rails 150a and 150b is raised to the upper position, and the defective lead frame is discharged from the discharge chute 44. You can also. It is possible to omit the post-process by eliminating defective products of the lead frame midway, and it is possible to prevent the problem that the die is damaged by the defective products in the post-process. Further, the transfer rail mechanism with the discharge shooter can be used as a transfer mechanism between the molds by disposing it between the molds as in the embodiment, and can be installed between processes or installed in a transfer section between the devices to discharge the shooter. Various uses are possible in combination with the mechanism.

(Pickup Mechanism) Next, a pickup mechanism for transferring individual pieces from the first die 40 to the second die 42 will be described. The pick-up mechanism of the present apparatus absorbs the individual pieces conveyed to the discharge end of the first mold 40 by the suction pad, and once lifts the pieces upward to move them above the second mold 42, and
2 to be placed on the mold surface. Therefore, FIG.
As shown in the figure, a rotary plate 190 is provided above the intermediate position between the first mold 40 and the second mold 42, and the rotary plate 190 is provided to be driven to rotate in a horizontal plane by a servomotor 192. An adsorbing mechanism is provided. The servomotor 192 is attached to the base plate 193 facing downward, and the rotating plate 190 is fixed to the lower end surface thereof.

The suction mechanism includes movable rods 194 a and 194 movably mounted in the vertical direction with respect to the rotating plate 190.
b, and suction pads 196a, 196b attached to the lower ends of the movable rods 194a, 194b. The movable rods 194a and 194b are attached to the rotating plate 190 so as to be freely rotatable around an axis together with vertical movement.
The air connection to the suction pads 196a and 196b is performed by connecting one end of the air tubes 198a and 198b to the suction pads 196a and 196b.
196b, and the other end is connected to the air mechanism through a fixed pipe 200 fixed downward from the base plate 193. The servomotor 192 used in this apparatus is a product having a hole penetrating the center portion as shown in FIG. 14, and the fixed pipe 200 is attached so as to penetrate the hole. The connection between the air tubes 198a and 198b and the fixed pipe 200 is a rotary air joint 202 so as not to hinder the rotation of the suction mechanism.

When the movable rods 194a and 194b are driven up and down, the push plates 206a and 206b contact the upper end surfaces of the movable rods 194a and 194b.
a and 206b are driven up and down by an air cylinder. FIG. 15 shows a structure in which the air cylinder 207 pushes the push plates 206a and 206b. In the figure, reference numeral 208 denotes a pushing plate 2 at the center in the longitudinal direction.
06a and 206b are fixed pushing arms. The pushing arm 208 is vertically movably supported above both sides of the servomotor 192, and a driving rod of the air cylinder 207 is fixed to each end of the pushing arm 208. By pushing out the drive rod of the air cylinder 207, the push plates 206a and 206b are pushed. In addition,
The upward movement operation of the movable rods 194a and 194b is performed by the resilience of a resilient spring 209 externally attached to the movable rods 194a and 194b.

FIG. 16 shows the rotation plate 190 and the positional relationship of the suction pads 196a and 196b with respect to the rotation plate 190 when viewed from above. Since the suction pads 196a and 196b transfer the individual pieces from the first mold 40 to the second mold 42 every time the rotary plate 190 makes a half turn, they are arranged at symmetrical positions with respect to the center of the rotary plate 190 as shown in the figure. , Just above the discharge position of the first die 40 and the supply position to the second die 42. By arranging the pair of suction mechanisms at symmetric positions in this manner, each time the rotating plate 190 makes a half rotation, the suction pad 196 is rotated.
The positions of a and 196b are inverted, and the individual pieces are conveyed from the first die 40 to the second die 42.

When the individual pieces are transferred from the first die 40 to the second die 42 without changing the orientation of the workpiece, or when the orientation of the workpiece is changed by 90 °. There is. This is because it is necessary to select a specific direction when sequentially feeding individual pieces on the processing stage depending on the product. The device of the present device is provided with a mechanism for enabling such selection. In FIG. 14, 210a and 210b are pulleys fixed to the movable rods 194a and 194b below the rotating plate 190. The pulleys 210a and 210b are used to extend the belt 212 so that the movable rods 194a and 194b rotate around the axis by using the rotating action of the rotating plate 190.

FIGS. 17 and 18 show the rotating plate 190.
Of the pulleys 210 a and 210 b above and the first pulley 214 disposed on the rotating plate 190.
a, 214b, the second pulleys 216a, 216b, and the fixed pulley 218 are shown. The fixed pulley 218 is a pulley that passes through the center of the rotating plate 190 and is fixed to the lower end of the fixed pipe 200. That is, the fixed pulley 21
8 is fixed to the machine frame, and the rotating plate 190 is rotatable with respect to the fixed pulley 218. The fixed pulley 21
8 is characterized in that a small-diameter pulley and a large-diameter pulley are formed in two stages.
0b and the pulleys 210a and 210b have a 1: 1 proportional relationship with the circumference of the large diameter pulley. The first pulleys 214a and 214b are
0a, 210b, and the second pulley 216
a and 216b are arranged close to a symmetrical position sandwiching the fixed pulley 218.

FIGS. 17 and 18 show pulleys 210a, 210
FIG. 17B shows a state in which the belt 212 is used by being stretched over the first pulleys 214a and 214b. In the case of FIG. 17, the belt 212 is stretched over the small diameter portion of the fixed pulley 218.
In this case, the difference is that the fixed pulley 218 extends over the large diameter portion. By rotating the rotating plate 190 by half a turn, in the case of FIG. 17, the individual pieces are transferred while changing the direction in which they are picked up from the direction of 90 °, and in the case of FIG. Can be posted. As described above, in the apparatus of the present apparatus, the transfer direction can be changed by changing the way of applying the belt 212, so that the way of applying the belt 212 may be selected according to the product. In the apparatus of the embodiment, when the belt 212 is replaced, the plate 219 is slid so that the length of the belt 212 is adjusted.

The transfer operation of the workpiece by the pickup mechanism is performed by interlocking the rotation operation by the rotary plate 190, the vertical movement of the movable rods 194a and 194b, and the suction operation of the suction pads 196a and 196b as described above. Done. That is, the individual piece discharged from the mold 40 is moved downward by the movable rod 194a to move the suction pad 196a.
After the movable rod 194a rises, the rotating plate 190 makes a half turn and moves above the second die 42. Next, in the mold 42, the movable rod 194a is moved down, the suction support by the suction pad 194a is released, and the individual pieces are transferred to the mold 42. At this time, the other suction pad 194b is on the mold 40, and the operation for sucking and supporting the next individual piece is performed. Thus, the rotating plate 1
Each time the 90 is rotated a half turn, the individual pieces are sucked and supported from the first mold 40 and transferred to the second mold 42.

As described above, since the pickup mechanism of the embodiment performs the transfer operation between the dies by rotating the rotary plate 190 by half, the transfer operation of the workpiece can be performed efficiently. The operation cycle time can be effectively reduced. Further, the transfer mechanism can be formed compactly, and can be suitably used when the dies are set close to each other as in this embodiment. In addition, it is possible to select the direction in which the workpiece is transferred during the transfer, and it is possible to use the lead processing machine effectively for general use.

(Product Storage Mechanism) The product that has been processed by the mold 42 is stored in the storage tray by the storage mechanism C described above. As shown in FIG. 2, the storage pick-up head 52 of the storage mechanism C sucks the individual pieces carried out from the mold 42 and aligns and stores them in the storage tray. In the case of the second die 42, the individual die is fed and processed.
There is a case where the lead frame is transported as it is to 2 and finally separated into individual pieces by the second mold 42. In the case of separating into individual pieces by the mold 42 in this way, unnecessary frames are ejected. Therefore, as shown in FIG. The unnecessary frame is discharged from the discharge shooter 220 while being transferred. The vertical position of the discharge shooter 220 is fixed.

As described above, the general-purpose lead processing machine of the present apparatus shares the configuration of the mold and the configuration of the feed drive mechanism on the main body side so that the general-purpose lead processing machine can be commonly used for processing of different kinds of products, and also has a rail mechanism between the dies. By installing a discharge shooter mechanism and a pickup mechanism, it can be used regardless of the difference in processing methods such as lead frame feeding and individual piece feeding. Thus, the mold set in mold 1 and mold 2 is DIP
What is necessary is just to select and use suitably according to a product, such as a type product and a PLCC type product.

In an actual lead processing machine, the timing for driving the feed drive mechanism and the like in each die is different, and the control program for the die is automatically set when the die is set in the processing machine. And is controlled by a computer. Further, when the mold is set on the processing machine, the mold can be set at a predetermined position by sliding it from the near side to the back side on the base 60 and pushing it in. The electrical system of the machine body and the control system such as air piping are configured to be contacted and automatically connected.

Further, in this apparatus, two dies are set in the processing operation section B. However, when processing a product having many processing steps, three or more dies may be arranged. It is possible. In this case, the above-described inter-die transfer rail mechanism is arranged between the dies, so that the workpiece can be reliably transferred between the dies.

[0076]

According to the transport rail mechanism with a discharge shooter according to the present invention, as described above, the lead frame is transported by combining the rail mechanism for guiding and transporting the lead frame with the discharge shooter mechanism. In addition to the above case, it can be suitably used for operations such as separation into individual pieces by a former die and transfer to a latter die. Further, when a defect of a workpiece is found in the middle of processing, the defective chute can be discharged in the middle of the processing line by a discharge shooter mechanism, so that accurate processing can be performed. Play.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a planar arrangement of each part of a general-purpose lead processing machine.

FIG. 2 is an explanatory view showing a front arrangement of each part of the general-purpose lead processing machine.

FIG. 3 is a perspective view of a processing stage unit.

FIG. 4 is an explanatory diagram showing a configuration of a feed drive mechanism provided in a processing machine main body.

FIG. 5 is a plan view showing a configuration of one type.

FIG. 6 is a plan view showing a configuration of a second type.

FIG. 7 is an explanatory view showing a mounting portion of a type 2 feed arm.

FIG. 8 is a plan view showing another configuration example of the mold.

FIG. 9 is an explanatory diagram showing a configuration of a feed bar in another mold.

FIG. 10 is a side view showing a feeding mechanism portion of another mold.

FIG. 11 is an explanatory diagram showing a side arrangement of a rail mechanism and a discharge shooter mechanism.

FIG. 12 is an explanatory view showing a planar arrangement of a rail mechanism.

FIG. 13 is an explanatory diagram showing a front arrangement of a rail mechanism and a discharge shooter mechanism.

FIG. 14 is an explanatory diagram showing a side arrangement of the pickup mechanism.

FIG. 15 is an explanatory diagram showing a driving unit of a push plate in the pickup mechanism.

FIG. 16 is an explanatory diagram showing an arrangement of a suction mechanism in the pickup mechanism.

FIG. 17 is an explanatory diagram showing how a belt is passed around pulleys and the like in a pickup mechanism.

FIG. 18 is an explanatory diagram showing how a belt is passed over pulleys and the like in a pickup mechanism.

FIG. 19 is an explanatory view showing a configuration of a conventional lead processing machine.

FIG. 20 is an explanatory view showing a configuration of a conventional lead processing machine.

FIG. 21 is an explanatory view showing a configuration of a conventional lead processing machine.

[Explanation of symbols]

 5, 100 Lead frame 40 1st mold 42 2nd mold 44 Discharge shooter 46, 47 Press device 50 XY stage 52 Storage pickup head 60 Base 70a, 70b Cylinder 72a, 72b Pusher 74a, 74b Motor 76a, 76b Ball screw 90, 110 , 130 Processing stage 92a, 92b Feed plate 94a, 94b Feed arm 98 Butt block 101, 102 Stopper 103 Unload arm 104 Air cylinder 111a, 111b Feed plate 112 Feed arm 114 Suction pad 120 Piece 122 Butt block 132 Feed bar 132a Pocket 144 Butt block 148a, 148b Stopper 150a, 150b Movable rail 152 Screw shaft 154 Electric motor 162a 162b Slide plate 170 Lock plate 172, 174 Lowering mechanism 190 Rotating plate 192 Servo motor 194a, 194b Movable rod 196a, 196b Suction pad 198a, 198b Air tube 200 Fixed pipe 202 Rotary air joint 206a, 206b Push plate 210a, 210b Pulley 212 Belt 214a, 214b First pulley 216a, 216b Second pulley 218 Fixed pulley 220 Discharge shooter

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ identification code FI H01L 21/68 H01L 21/68 A H05K 13/02 H05K 13/02 U (58) Fields surveyed (Int.Cl. ⁷ , DB Name) H01L 23/50 B21D 28/00 B65G 11/18 B65G 47/86 H01L 21/50 H01L 21/68 H05K 13/02

Claims (3)

(57) [Claims] 1. A pair of movable rails, which guide a rail portion of a lead frame as a workpiece and are variably supported in the width direction, and move the movable rails in the width direction according to the width size of the workpiece. And a drive mechanism for adjusting the position of the movable rail, at a retreat position below the conveying height of the workpiece, and at an intermediate position in the width direction of the movable rail, for introducing and discharging unnecessary frames at the conveying height position of the workpiece. And a discharge shooter mechanism having a discharge shooter that moves up and down between positions. 2. A vertical movement mechanism which guides and supports a movable rail in a vertical direction and retracts the movable rail to a lower position which does not hinder mold replacement when a mold is replaced and set. The transfer rail mechanism with a discharge chute according to claim 1. 3. The transfer rail mechanism with a discharge chute according to claim 1, further comprising a control unit for moving the discharge chute up and down according to the processing content of the former die.