JPH0536106Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Industrial Application Field) The present invention relates to a lead frame feeding device used in semiconductor manufacturing equipment, and particularly relates to a device for pitch feeding a lead frame.

(Prior Art) FIG. 1 is a front view showing a lead frame feeding device according to a conventional example. Frame 1 has support pin 2
A cam follower 3A supported at one end of the feed lever 3 is pressed against a cylindrical feed cam 5 under the biasing force of a spring 4. The feed cam 5 is fixed to a drive shaft 6 and is rotatable by a drive motor (not shown). A feed shaft 8 is connected to the other end of the feed lever 3 via a connecting rod 7A and a connecting fitting 7B, and a feed pawl 9 is fixed to the feed shaft 8. That is, the feed shaft 8 is rotated by a rotating means (not shown) to engage the feed pawl 9 with the feed hole of the lead frame, and in this state, the feed lever 3 is swung by the feed cam 5, and the feed Lever 3
By reciprocating the feed shaft 8 and the feed pawl 9 connected to the lead frame at a predetermined pitch, the lead frame can be fed in pitches with a pitch movement amount that matches the bonding pitch.

(Problem to be solved by the invention) Here, the feed pitch of the lead frame by the feed device related to the conventional example described above is determined by the set feed amount of the drive unit, such as the swing angle of the feed lever 3, that is, the cam shape of the feed cam 5, etc. It is uniquely determined by.

Therefore, in order to be able to handle lead frames with different feed pitches in the conventional feed device, it is necessary to prepare a feed cam 5 of a different shape for each feed pitch, and when switching the feed pitch, This requires complicated installation and removal work for the feed cam 5.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lead frame feeding device that can instantly change the setting of the pitch movement of the feeding pawl in accordance with the feeding pitch of the lead frame.

[Structure of the invention] (Means for solving the problem) In order to achieve the above object, the lead frame feeding device according to the invention includes a feeding lever, a rolling element that swings together with the feeding lever, and a rolling element that swings together with the feeding lever. A first position adjustment mechanism for adjusting the attachment position of the feed lever with respect to the swing fulcrum is provided on the feed shaft, and an engager that engages with the rotor in the axial direction of the feed shaft; A second position adjustment mechanism is provided to adjust the mounting position of the feed shaft in the axial direction,
Adjusting the pitch movement of the feed pawl by adjusting the position of the rotor by the first position adjustment mechanism, and adjusting the moving end position of the feed pawl by adjusting the position of the engager by the second position adjustment mechanism. In addition, the present invention is characterized in that a means for displaying the pitch movement amount of the feed pawl obtained by adjusting the position of the rotor by the first position adjustment mechanism is provided.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 2 is a front view showing a lead frame feeding device according to an embodiment of the present invention, and FIG. 3 is a side view of FIG. 2.

A drive shaft 12 driven by a drive motor (not shown) is supported on the frame 11, and a cylindrical feed cam 13 serving as a drive unit in the present invention is fixed to the drive shaft 12. Also, frame 1
1 has a sub-feed lever 15 via a support pin 14.
is swingably supported, and a cam follower 17 supported at the intermediate portion of the sub-feed lever 15 is pressed against the feed cam 13 under the biasing force of a spring 16. That is, the sub-feed lever 15 moves the feed cam 1
3, it is possible to always swing at a constant angle.

A bracket 18 is fixed to the frame 11,
A main feed lever 20 as a feed lever in the present invention is attached to the bracket 18 via a support pin 19.
is swingably supported. Main feed lever 20
The lower end of is connected to the sub-feed lever 15 via a connecting rod 21. That is, the main feed lever 20 is linked to the swinging of the sub-feed lever 15 as the feed cam 13 rotates, and can always swing within a certain angular range.

The upper half of the main feed lever 20 relative to the support pin 19 is shaped like a frame as shown in FIGS.
A slider 23 that swings along both guide portions 22 in the longitudinal direction of the main feed lever 20, that is, in the radial direction of swing, can be held within the frame. A rotor 24 is rotatably supported on the slider 23, and a screw shaft 26, which extends longitudinally within the frame of the main feed lever 20 and is rotatable by an operation knob 25, is threaded onto the slider 23. are combined. That is,
The rotor 24 is moved to the mounting position relative to the support pin 19 on the main feed lever 20, that is, the support pin 1 by rotating the screw shaft 26 using the operation knob 25.
It is attached to the main feed lever 20 with a variable swing radius relative to 9, and the amount of swing can be adjusted. Note that 27 is a bolt for fixing the screw shaft 26.

On the other hand, the support part 2 fixed to the frame 11
A feed shaft 29 is supported at 8 so as to be movable in the axial direction thereof, that is, in the feed direction of the lead frame. A feed claw 30 is attached to the feed shaft 29,
The feed pawl 30 is swung as shown by an arrow in FIG. 3 by a rotating means of the feed shaft 29 (not shown), and is capable of engaging with a feed hole provided in the lead frame.

Further, an engager 31 is supported on the feed shaft 29 . The engaging element 31 is configured to move integrally with the feed shaft 29 in the axial direction thereof while being held between a pair of fixing fittings 32 and 33 supported by the feed shaft 29 on both sides thereof. In addition, the fixing metal fittings 3
2 and 33 are movable relative to the feed shaft 29 in the axial direction, and are fixed on the feed shaft 29 by bolts 40 and 41, respectively. The engaging element 31 is rotatable relative to the feed shaft 29 during the rotation of the feed shaft 29, and is inserted into the feed shaft 29 under the penetrating state of the support rod 34 parallel to the feed shaft 29 supported by the support portion 28. It is possible to maintain a posture in a plane perpendicular to .

Here, the engaging element 31 is provided with an engaging groove 35 with which the rotor 24 engages in the axial direction of the feed shaft 29 .

In other words, the amount of swing of the rotor 24, the feed shaft 29
The component related to the axial direction of is transmitted through the engager 31,
Transmission to the feed shaft 29 is possible.

Note that an indicator needle 36 is attached to the slider 23 , and the indicator needle 36 corresponds to a scale plate 37 formed on the outer surface of the main feed lever 20 to prevent the rolling element 24 from swinging relative to the support pin 19 . The amount of movement of the feed shaft 29 and the feed pawl 30 determined by the radius and swing angle, that is, the feed pitch of the lead frame can be displayed.

Next, the operation of the above embodiment will be explained.

In this lead frame feeder, the feed cam 13 is driven by a drive motor (not shown).
When rotates, the sub feed lever 15 and the main feed lever 20 swing within a certain angle range, and the main feed lever 2
The feed shaft 2 having the feed pawl 30 is connected to the feed shaft 2 through the engaging element 31 engaged with the rolling element 24 that swings with the
9 is caused to reciprocate in its axial direction, that is, to move in pitch. Here, the pitch movement amount of the feed shaft 29 is determined by the constant swing angle of the main feed lever 20,
It is determined by the mounting position of the roller 24 with respect to the support pin 19 on the main feed lever 20.

Therefore, in the above-mentioned feeding device, when the feed pitch of the lead frame changes, the operating knob 25
By rotating the screw shaft 26 and moving the slider 23 along both guide portions 22 of the main feed lever 20, the mounting position of the roller 24 with respect to the support pin 19 on the main feed lever 20 is adjusted. It's enough. That is, the feed cam 13
It becomes possible to immediately change the setting of the pitch movement amount of the feed pawl 30 in accordance with the feed pitch of the lead frame without changing the feed pawl 30. Further, by operating the operation knob 25, the feed pitch of the lead frame can be finely adjusted.

Furthermore, the amount of pitch movement of the feed pawl 30 obtained by operating the operation knob 25 is determined by the distance between the indicator needle 36 and the scale plate 3.
7, it is possible to easily change the setting of the pitch movement amount of the feed pawl 30.

Also, when changing the pitch movement setting of the lead frame, loosen the bolts 40, 41 and fix the fixing metal fittings 32, 3.
3 and the feed shaft 29 and adjust the supporting position of the engager 31 on the feed shaft 29, the position of the moving end of the feed pawl 30 can be adjusted very easily. Therefore, when used in a bonding device, for example, by adjusting the moving end position, even after changing the pitch movement amount according to the lead frame used, the bonding location on the lead frame can be adjusted every time the pitch feed ends. It becomes possible to sequentially position the bonding device at a predetermined bonding position.

Incidentally, in the above embodiment, the case where the drive unit in the present invention is the feed cam 13 has been described. However, the drive unit in the present invention is not limited to a cam, but may use a cylinder device with a constant stroke or the like.

[Effects of the Invention] As described above, according to the present invention, it is possible to immediately change the setting of the pitch movement amount of the feed pawl in accordance with the feed pitch of the lead frame.

Further, the setting of the pitch movement amount can be easily changed.

Furthermore, the position of the moving end of the feed claw can be adjusted very easily.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a lead frame feeding device according to a conventional example, FIG. 2 is a front view showing a lead frame feeding device according to an embodiment of the present invention, and FIG.
2 is a side view of FIG. 2, FIG. 4 is a sectional view showing the main part of FIG. 2, and FIG. 5 is a front view of the main part of FIG. 2. 13...Feed cam, 19...Support pin, 20...
...Main feed lever, 23...Slider, 24...
Roller, 26...Screw shaft, 29...Feed shaft, 30
...Feeding pawl, 31...Engagement element, 32, 33...Fixing metal fittings, 35...Engagement groove, 40, 41...Bolt.

Claims (1)

[Scope of utility model registration request] The feed lever has a feed lever that swings around a fulcrum by a drive unit, and a feed shaft that has a lead frame feed pawl, is connected to the feed lever, and moves pitchwise in the axial direction by the swing of the feed lever. In the lead frame feeding device that feeds the lead frame in pitches via the feed pawl by pitch movement, the feed lever includes a rotor that swings together with the feed lever, and a swing of the feed lever of the rotor. A first position adjustment mechanism is provided for adjusting the mounting position relative to the fulcrum, and the feed shaft includes an engager that engages with the rolling element in the axial direction of the feed shaft, and an engager that engages with the rotor in the axial direction of the feed shaft. A second position adjustment mechanism for adjusting the mounting position is provided, and the first position adjustment mechanism adjusts the position of the rotor to adjust the pitch movement of the feed pawl, and the second position adjustment mechanism adjusts the pitch movement of the engager. The moving end position of the feed pawl can be adjusted by position adjustment, and means for displaying the pitch movement amount of the feed pawl obtained by adjusting the position of the rotor by the first position adjustment mechanism is provided. A lead frame feeding device characterized by: