JPH0638421Y2 - Lead frame transfer / positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an automatic wire bonder for wire bonding such as an IC and a lead frame carrying / positioning device such as a device for aligning a frame after wiring.

[Conventional technology]

FIG. 3 shows an outline of the configuration of an example of a conventional lead frame conveying / positioning device of this type.

The pin 16 (claw) is inserted into the pin hole 31 of the lead frame 3 pushed out from the magazine and placed on the guide rail 2, and the transport moving body (not shown) to which the pin 16 is attached moves. The lead frame 3 is guided by the guide rails 2 and conveyed, and the conveying movable body hits the stopper 17 to stop and be positioned.

[Problems to be solved by the device]

In the conventional lead frame conveying / positioning device having the above-described configuration, in order to insert the pin 16 into the pin hole 31 of the lead frame 3 pushed out from the magazine and placed on the guide rail 2, the lead frame 3 The mounting position on the guide rail 2 requires high accuracy, the pin 16 is not accurately inserted into the pin hole 31, and the lead frame 3 may be damaged.

Further, if the lead frame 3 or the pin 16 encounters resistance such as an obstacle during transportation, the lead frame 2 or the pin 16 may be deformed or damaged unless a detection mechanism is added.

Further, since the positioning of the lead frame 3 is performed by the indirect stopper 17, there is a problem in that the positional accuracy is difficult.

The present invention has been made to solve the above problems,
It is an object of the present invention to provide a lead frame transport / positioning device that can obtain high positional accuracy without damaging the lead frame 3.

[Means for Solving the Problems]

The lead frame conveying / positioning device of the present invention has a guide rail for guiding the lead frame pushed out from the magazine, and the guide direction of the guide rail is the X axis.
X on the plane of the lead frame placed on the guide rail.
Assuming XYZ rectangular coordinates as the -Y plane, the base that moves in the X-axis direction, and the disk surface on the fixed axis of this base are X-Z.
A lower disk that is mounted in a rotatable structure parallel to the plane and whose circumferential surface abuts the lower surface of the lead frame mounted on the guide rail, and a structure that is vertically movable in the Z-axis direction on the base. The attached rod-shaped body and the fixed shaft of the rod-shaped body are attached to a structure in which the disc surface is rotatable in parallel to the XZ plane, and when the rod-shaped body descends, the circumferential surface thereof is the guide rail. It is equipped with an upper disk that presses against the upper surface of the lower disk contact area by the elastic force of a compression spring, and a stopper block that is attached to the guide rail and positions the lead frame by directly contacting the lead frame and is pushed out from the magazine. When the lead frame placed on the guide rail is held and conveyed by the lower disc and the upper disc and the lead frame is prevented from moving by an object, the lower disc is moved. Solve holding the upper disc rotates, it is of the structure in the lead frame no load.

〔Example〕

 1 and 2 show an embodiment of the present invention.

In the figure, 1 is a magazine, 2 is a guide rail, 3 is a lead frame pushed out from the magazine 1 and placed on the guide rail 2, hereinafter, the guide direction of the guide rail 2 is the X axis, and the plane of the lead frame 3 is X-. X- with Y plane
Description will be made assuming YZ rectangular coordinates.

4 is a base plate having a surface parallel to the XY plane, 5 is a base that moves on the surface of the base plate 4 in the X-axis direction, and 6 is a fixed shaft of the base 5 and a disk surface via a bearing 7. Is a lower disc that is mounted in a rotatable structure parallel to the X-Z plane and has a circumferential surface abutting the lower surface of the lead frame 3, 8 is a cylinder, 9 is parallel to the XY plane, and the cylinder 8 is the Z-axis. A plate-like member 10 attached to the base 5 in a structure that can move up and down in the direction, is inserted into the through hole of the plate-like member 9 and is supported by an upper stop plate 11, and moves in the Z-axis direction as the plate-like member 9 moves up and down. The rod-shaped body 12 that moves up and down is attached to the fixed shaft of the rod-shaped body 10 through a bearing 13 in a structure in which the disk surface is rotatable parallel to the XY plane, and when the cylinder 8 operates and the rod-shaped body 10 descends. , An upper disc that is pressed against the upper surface of the portion of the lead frame 3 where the lower disc 6 abuts by the elastic force of the compression spring 14, It is a topper block.

The circumferential surface of the lower disk 6 whose disk surface is parallel to the XZ plane comes into contact with the lower surface of the lead frame 3 pushed out from the magazine 1 and placed on the guide rail 2, and the cylinder 8 is operated to operate the rod-shaped body. 10 descends, and the disk surface attached to the rod-shaped body 10 becomes X.
-The peripheral surface of the upper disk 12 parallel to the Z plane is pressed by the elastic force of the compression spring 14 onto the upper surface of the portion of the lower disk 6 of the lead frame 3 with which the peripheral surface abuts, and the lead frame 3 is clamped and held. The base 5 moves in the X-axis direction to convey the lead frame 3.

When the tip of the lead frame 3 hits the stopper block 15, the lead frame 3 is stopped and positioned. In this case, as the substrate 5 moves, the upper disk 12 and the lower disk 6
Is rotated and the hold is released.

Even when the lead frame 3 hits an obstacle or the like during transportation, the holding is similarly released and the lead frame 3 is not damaged.

[Effect of device]

As described above, according to the present invention, the mounting position accuracy of the lead frame mounted on the guide rail pushed out from the magazine does not need to be high as in the case of the conventional device, and the pin has a pin hole. There is no damage caused by not accurately entering the lead frame, and even if the lead frame receives a small resistance during transportation, it can be detected and released to prevent damage, and positioning can be performed with high precision. .

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are explanatory views showing an embodiment of the present invention, and FIG.
The figure is an explanatory view showing the outline of the configuration of an example of a conventional lead frame transporting / positioning device of this type. 1 ... magazine, 2 ... guide rail, 3 ... lead frame, 4 ... base plate, 5 ... Base, 6 ... Lower disk, 7
...... Bearing, 8 …… Cylinder, 9 …… Plate, 10
…… Bar-shaped body, 11 …… Stop plate, 12 …… Upper disk, 13 …… Bearing, 14 …… Compression spring, 15 …… Stopper block The same reference numerals in the drawings indicate the same or corresponding ones.

Claims (1)

[Scope of utility model registration request] 1. A guide rail for guiding a lead frame extruded from a magazine, and an XYZ rectangular coordinate system in which the guide direction of this guide rail is the X axis and the plane of the lead frame mounted on the guide rail is the XY plane. Assuming that, the base that moves in the X-axis direction and the fixed shaft of this base are mounted in a structure in which the disc surface is rotatable parallel to the XZ plane, and the circumferential surface is mounted on the guide rail. The lower disk that abuts the lower surface of the lead frame, the rod-shaped body that is mounted on the base in a structure that can move up and down in the Z-axis direction, and the disk surface rotates parallel to the XZ plane on the fixed shaft of this rod-shaped body. When the rod-shaped body is attached to a flexible structure, the upper surface of which the circumferential surface thereof is pressed against the upper surface of the portion of the lead frame mounted on the guide rail with which the lower disk is abutted by the elastic force of the compression spring. Board and above guy Equipped with a stopper block that is attached to the rail and positions the lead frame by directly hitting the lead frame, the lead frame pushed out from the magazine and placed on the guide rail is held by the lower disc and the upper disc and conveyed. In addition, when the lead frame is prevented from advancing by an object, the lower disk and the upper disk are rotated to release the holding, so that the lead frame is not loaded.