JP3176407B2 - Lead frame pickup feeding mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead frame pickup feeding mechanism used in a lead frame processing machine.

[0002]

2. Description of the Related Art In a processing machine for forming a lead, a lead frame is placed on a transport rail and is processed while feeding the fixed length. When a lead frame is mounted on a processing machine, a normal processing machine picks up the lead frames one by one from a lead frame supply position by an automatic mechanism, transfers the lead frames onto a transport rail, and supplies the lead frames. There are various types of lead frame supply mechanisms.In general, there are a pickup mechanism that chucks the lead frame and transfers it to the transport rail, and a feed mechanism that slides on the transport rail and sends the lead frame to a predetermined position. Have.

The lead frames are set at a supply position in a stacked state, and are picked up and transferred in order from the topmost lead frame. In this case, the supply position of the lead frame may be on the side of the transport rail, or may be in a position in series with the transport rail on the loading end side of the transport rail. The lead frame transferred onto the transport rail by the pickup mechanism is sent to a predetermined position on the transport rail by, for example, pushing a rear end surface of the lead frame with a pusher. Since the lead frame normally feeds the fixed length of the feed arm by engaging the pin of the feed arm that moves by a fixed size with the guide hole, the operation of feeding the lead frame on the transport rail is essential to reliably transfer the lead frame to the feed arm. Operation.

[0004]

As described above, in the conventional lead frame supply mechanism, the operation of picking up and feeding the lead frame is performed separately, and the mechanism is complicated because it is composed of different mechanisms. There was a point.
Further, since the pickup operation and the feeding operation are performed separately, there is a problem that the cycle time for supplying the lead frame does not increase. Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to perform a lead frame pickup and feeding operation by one operation when supplying a lead frame to a processing machine. Another object of the present invention is to provide a lead frame pickup feeding mechanism capable of efficiently supplying a lead frame.

[0005]

To solve the above-mentioned problems, the present invention has the following arrangement. In other words, in the lead frame pickup feeding mechanism for supplying the lead frame to the processing machine that processes the lead frame while transporting the lead frame in the longitudinal direction on the transfer rail, the lead frame pick-up mechanism may
Supply position of the provided lead frame and the transfer rail
Move the lead frame back and forth between the specified positions above and transfer the lead frame
A transfer mechanism that moves the lead frame at the lead frame supply position.
Pickup mechanism for picking up
Of the lead frame previously transferred to the loading end side of the feed rail.
Feeding mechanism that pushes the rear end face and feeds it to the specified feed position
Are provided in the transfer mechanism, and are linked to the forward / backward movement of the transfer mechanism.
Operating the pickup mechanism and the feeding mechanism
By lead frame pick-up and feeding
It is characterized in that work is performed in conjunction . In addition, pickups
Grip mechanism holds the lead frame from both sides in the width direction
Fingers are provided to be able to move up and down, and the feeding mechanism is
Rear end position of the lead frame previously transferred to the loading end side of the
That can move forward and backward between the position and the position retracted from the rear end position
Levers, which are provided on the moving plate of the transfer mechanism.
It is characterized by having. Also, if the feeding mechanism is
When feeding the frame to the feed position,
Guide both rails up and down between the transport rails
A guide cover is provided on the transport rail so as to be openable and closable .

[0006]

The pickup mechanism picks up the lead frame at the supply position of the lead frame, moves the lead frame to the loading rail side by the transfer mechanism, and transfers the lead frame on the transfer rail. The feeding mechanism such as the feeding lever moves forward and backward in conjunction with the transfer mechanism, and simultaneously moves the rear end face of the lead frame transferred on the transport rail in the previous transfer operation by the forward movement of the transfer mechanism. Push it to the feed position. In this way, the operation of transferring the lead frame to the transfer rail and the operation of sending the lead frame transferred to the transfer rail to a predetermined feed position are performed in accordance with one forward and backward movement operation. The guide cover guides the lead frame to be surely fed when the lead frame is fed on the transport rail.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an explanatory view showing a configuration of a lead frame pickup feeding mechanism according to the present invention. The figure shows the pickup feeding mechanism as viewed from the front. In the lead frame supply device of the embodiment, the lead frame supply position is arranged at the extension position on the carry-in end side of the transfer rail. After the lead frame is picked up at the supply position, it is moved forward and moved onto the transfer rail. It is a method to be mounted. FIG. 4 shows a supply position of the lead frame and a planar arrangement of the transport rail. 10a, 10b
Reference numeral denotes a transfer rail, and reference numeral 12 denotes a mold disposed on the destination side of the transfer rails 10a and 10b. The hatched area A is a supply position of the lead frame to be applied to the processing machine, and 14a, 14b, 14
c and 14d are width guide rails for guiding the position of the lead frame in the width direction, and 15a and 15b are end surface guide rails for guiding the end surface in the longitudinal direction of the lead frame. The lead frames stacked and housed in the lead frame stocker are set below the supply position of the lead frame, lifted from the lead frame stocker, and the outer surfaces are fixed by the width guide rails 14a... And the end guide rails 15a, 15b. It is guided and set at the lead frame supply position.

As shown in FIG. 1, the lead frame pickup supply mechanism is installed above the lead frame supply position. In the figure, the hatched area A indicates the supply position of the lead frame. The support plate 18 is set upright on the machine frame 16, the plate surface is oriented vertically on the side surface of the support plate 18, and the support plate 20 is set horizontally so as to extend above the transport rails 10 a and 10 b. . On the plate surface of the support plate 20, the LM is horizontally moved to a position above the transport rails 10a and 10b.
The guide 22 is fixed, and the movable plate 24 is installed by engaging with the LM guide 22. The moving plate 24 has an L-shaped front shape and a lower end portion extends vertically downward.

FIG. 2 is a left side view of the pickup supply mechanism.
FIG. 3 is a right side view of the pickup supply mechanism. The moving plate 24 hangs vertically downward from a lateral position of the support plate 20 as shown in the figure. Reference numeral 26 denotes a stepping motor fixed to the end of the support plate 20 on the side of the transport rail, and reference numeral 28 denotes a pulley provided on the support plate 20 at a position facing the stepping motor 26. As shown in FIG. 1, a timing belt 30 is stretched between a stepping motor 26 and a pulley 28, and the moving plate 24 is locked by a belt on the upper side of the timing belt 30 and guided by the LM guide 22, and is moved in the front-rear direction. Can be moved to The moving plate 24 and the stepping motor 26 constitute a lead frame transfer mechanism.

A support arm 32 for supporting the pickup mechanism extends horizontally above the movable plate 24 toward the near side in FIG. Numeral 34 denotes a vertically moving cylinder mounted on the support arm for vertically driving the pickup unit.
Reference numeral 36 denotes fingers for holding the lead frame from both sides in the width direction. Reference numeral 38 denotes a rotary actuator for opening and closing the finger 36. The vertical movement cylinder 34 and the fingers 36 are driven and controlled in accordance with the lead frame transfer operation.

On the lower side surface of the movable plate 24, there is provided a feeding mechanism for feeding the lead frame transferred on the transport rail to a predetermined position. Reference numeral 40 denotes a feed lever for feeding the lead frame on the transport rail, which is guided and supported on the side surface of the movable plate 24 via the LM guide 42 so as to be movable in the vertical direction. 44 is a cylinder for moving the feeding lever 40 up and down. The cylinder 44 and the feed lever 40 are connected via a support arm 46. A spring 48 urges the feed lever 40 in the lead frame feeding direction.

The operation of the lead frame pickup feeding mechanism of the above embodiment is as follows. After the lead frame is picked up by the finger 36 from the lead frame supply position, the lead frame is advanced to the transport rails 10a and 10b to transfer the lead frame. At the time, the transport rail 10
The feed lever 40 acts to push the rear end of the lead frame by the feed lever 40 to feed the lead frame transferred on the a and 10b. Here, when sending the lead frame to the sending position, the lead frame is transported by the transport rails 10a, 10a,
In this embodiment, a guide cover for guiding the rail portion of the lead frame is provided at the transport rails 10a and 10b to ensure that the lead frame is fed because the lead frame is slid and moved.

4 and 5, reference numeral 50 denotes a guide cover. The guide cover 50 is provided over substantially the entire length of the transport rails 10a and 10b.
An outer portion of the shaft 10b is supported by a shaft 52 so as to be vertically openable and closable. Reference numeral 54 denotes a motor for opening and closing the guide cover. A bevel gear is fixed to the output shaft of the motor 54, and the guide cover 50 is opened and closed by meshing with a gear 56 fixed to the shaft 52. The front edge of the guide cover 50 is bent into a short L-shape, and when placed on the transport rails 10a and 10b, the inner edge positions of the transport rails 10a and 10b and the front edge position coincide with each other so that the rail portion of the lead frame is formed. Set the position to guide vertically.

Next, the operation of the lead frame pickup feeding mechanism according to the above embodiment will be described. FIG. 1 shows a state in which the finger 36 is above the lead frame supply position and the pickup mechanism is in the upper position.
In this state, the vertical cylinder 34 is operated to lower the finger 36 to the lead frame supply position, and the rotary actuator 38 is operated to hold one topmost lead frame. After the finger 36 is raised to the upper position at the lead frame supply position, the stepping motor 26 is driven to move the movable plate 24 to the transport rail 10.
a, 10b. The moving plate 24 is horizontally guided by the LM guide 22 and stops when it moves forward to a predetermined position. At this stop position, the transport rail 10
The operation of transferring the lead frame to a and 10b is performed.
The vertical cylinder 34 is driven to lower the finger 36 and release the grip of the lead frame by the finger 36 to transfer the lead frame onto the transport rails 10a and 10b.

After the lead frame is transferred to the transport rails 10a and 10b, the finger 36 is raised to the upper position,
Retreat to the original position above the lead frame supply position and perform the next pickup operation. On the other hand, the transport rail 10
On a and 10b, the feeding operation of the lead frame 60 is performed by the feeding lever 40 as the moving plate 24 moves forward. That is, by the action of the above-described pickup unit, the transport rails 10a,
The lead frame is sequentially transferred to the transport rails 10a and 10b.
By pushing the rear end face by the feed lever 40, the feed plate 40 is moved forward by the moving stroke of the moving plate 24 to be fed. In FIG. 1, reference numeral 40a indicates a forward position of the feeding lever 40.
The spring 48 is provided to prevent an overload from being applied when feeding the lead frame. However, if the feeding cannot be performed normally due to some obstacle at the time of feeding, the feeding lever is opposed to the urging force of the spring 48. It is also used as a detection mechanism for reversing 40 and detecting a feeding abnormality. By tilting the feed lever 40, it is possible to prevent unreasonable feed and to detect abnormality by a sensor.

The feed lever 40 advances and retreats together with the movable plate 24, so that at the time of feed, that is, when the feed lever 40 is at the retreat position, the cylinder 44 is driven to lower the feed lever 40 to the position where the lead frame 60 is fed. After being fed at the position, the lead frame 60 transferred to the transport rails 10a and 10b is raised to a position where it is avoided, and is retracted to the original position. When the lead frame is fed by the feed lever 40, the motor 54 is driven to cover the transport rails 10a and 10b with the guide cover 50.
Feed in while guiding the rail part of the lead frame. Then, after the feeding of the lead frame is completed, the guide cover 50 is opened so that the lead frame can be placed on the transport rails 10a and 10b. Since the above-mentioned pickup mechanism and feeding mechanism move back and forth in conjunction with the moving plate 24, the operation of the finger 36, the feeding lever 40 and the like is appropriately controlled as described above, so that the continuous lead frame pick-up and feeding operation is performed. It can be performed.

2 and 3, the positions of the plurality of guide covers 50 are shifted from each other in the apparatus of the above embodiment so that the width of the conveying rails 10a and 10b can be variably adjusted. It shows that the position of the guide cover 50 is moved in accordance with the lead frame product. In FIG. 1, reference numeral 70 denotes a timing belt for moving the transport rails 10a and 10b in the width direction with respect to each other.
a, and the transport rail 10b is engaged with the other belt to adjust the distance between the transport rails 10a and 10b. 74
Is a drive shaft driven by a motor 72, and 76 is a timing belt, whereby the width guide rails 14a, 14b, 14c, 14 at the lead frame supply position are provided.
d can also automatically set the interval according to the product.

The lead frame pickup feeding mechanism of the above embodiment can efficiently transfer the lead frame to the transport rail from the lead frame supply position, and feeds the lead frame in accordance with the pickup transfer operation. Since the operation is performed, an efficient pickup feeding operation can be performed, and the cycle time of the lead frame supply operation can be efficiently increased. In addition, since the pickup operation and the feeding operation are organically linked to each other, the device can be formed compact and the configuration can be simplified.

[0019]

According to the lead frame pickup feeding mechanism of the present invention, as described above, the apparatus can be simplified by interlocking the lead frame pickup operation and the feed operation, and In addition, the operation of applying the lead frame to the processing machine can be efficiently performed. Further, by providing the guide cover on the transport rail, the lead frame can be fed without causing deformation or the like when the lead frame is transported on the transport rail.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a front layout of each part of an embodiment of a lead frame pickup feeding mechanism.

FIG. 2 is an explanatory view of a pickup feeding mechanism of a lead frame as viewed from a left side direction.

FIG. 3 is an explanatory view of a pickup feeding mechanism of a lead frame as viewed from a right side direction.

FIG. 4 is an explanatory diagram showing a planar arrangement of a transfer rail and the like.

FIG. 5 is an explanatory diagram showing an arrangement of a transport rail and a guide cover.

[Explanation of symbols]

 10a, 10b Transfer rail 12 Die 14a, 14b, 14c, 14d Width guide rail 15a, 15b End guide rail 18 Support plate 20 Support plate 22 LM guide 24 Moving plate 26 Stepping motor 28 Pulley 30 Timing belt 34 Vertical movement cylinder 36 Finger 38 Rotary actuator 40 Feed lever 42 LM guide 44 Cylinder 50 Guide cover 54 Motor 60 Lead frame

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-202925 (JP, A) JP-A-63-308328 (JP, A) JP-A-63-58845 (JP, A) 134537 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01L 21/50

Claims (3)

(57) [Claims] 1. A lead frame is mounted on a transfer rail in a longitudinal direction.
In a lead frame pickup feeding mechanism for supplying a lead frame to a processing machine that processes while moving in a direction, a lead frame provided on a loading end side of the transfer rail.
Forward and backward between the supply position of
A transfer mechanism for moving the lead frame to move the lead frame, and picking the lead frame at the supply position of the lead frame.
Pickup mechanism to lift up the transfer rail
Press the rear end face of the lead frame that was previously transferred to the entry end side.
And the feeding mechanism that feeds to the predetermined feeding position.
Mechanism, and connected to the forward / backward movement of the transfer mechanism.
By operating the backup mechanism and the feeding mechanism,
And lead frame pickup and feeding operations
Lead frame of the pickup input mechanism which is characterized in that in conjunction with. 2. The pickup mechanism according to claim 1, wherein
The finger that grips the arm from both sides in the width direction can be moved up and down
And the feeding mechanism is provided at the loading end side of the transport rail.
The rear end position of the lead frame previously transferred and the rear end position
Equipped with a feed lever that can move forward and backward with the position retracted from the position
The pickup feeding mechanism for a lead frame according to claim 1, wherein these are provided on a moving plate of the transfer mechanism. 3. The lead mechanism sends the lead frame.
When feeding the lead frame,
Guide rails up and down between the transport rails
A guide cover is provided on the transfer rail so that it can be opened and closed.
According to claim 1 or 2, wherein the lead frame of the pick-up input mechanism, characterized in that there.