JPH0344749Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lead frame storage device that sequentially stores continuously conveyed lead frames in a magazine.

[Prior Art] Various devices have been known for storing lead frames in magazines, but these devices can be roughly divided into two main types. The first method is to pick up the lead frame conveyed by a conveyor from above, move it, and then store it in the magazine from above.The second method is to push the conveyed lead frame upward from below. The lead frame is raised and stored in a magazine located above, and the lowermost lead frame is supported by support claws provided at the bottom of the magazine.

[Problems to be solved by the invention] In the first method described above, the lead frame is picked up, moved, and then lowered, so the moving path and time are long, and the plate supporting the lead frame in the magazine is moved by an elevator. The magazine must be lowered by a device such as the above, which requires a complicated device.Moreover, when an elevator or the like is used, there is a disadvantage that it takes a long time to replace the magazine. Second
In this method, the time required for storage is short, but if the supporting claws are closed by a spring, the edges of the supporting claws will push the claws open when the lead frame is pushed up, so the claws will cause the lead frame to close. There is a risk of deformation, and if the claws are opened and closed by an actuator, the structure will be complicated, and there will be problems when used with lead frames of different widths. There were also problems.

The present invention has been devised to eliminate the above-mentioned drawbacks, and provides a lead frame storage device that has a high storage capacity and is free from the risk of deforming the lead frame.

[Means for Solving the Problems] The lead frame storage device according to the present invention includes: a push-up member that pushes up and inserts lead frames sequentially from below into a magazine; a lifting mechanism that moves the push-up member up and down; biased by a spring,
A push-up member of a lead frame storage device comprising a support member whose distal end protrudes into the magazine and supports the lowermost lead frame is provided with an engaging portion that engages with the support member when raised. In addition, an advancing/retracting mechanism for moving the push-up member forward and backward is provided.

[Function] In the lead frame storage device according to the present invention, when the push-up member is raised by the elevating mechanism, the engaging portion engages with the support member and pushes it open, and then When the push-up member moves, the engagement portion is disengaged and the support member closes to support the lead frame.

[Embodiment] FIGS. 1 to 4 show a lead frame storage device according to an embodiment of the present invention, in which FIG. 1 is a partially sectional front view showing the upper storage section 2, and FIG. FIG. 3 is a front view showing the lower drive section 4, and FIG. 4 is a side view of the same section.

Reference numeral 6 denotes a conveyor belt consisting of two round belts that conveys the lead frame 7 (see Fig. 4).A magazine holder 8 is disposed above the conveyor belt 6, and the magazine 1 is
0 is clamped (see Figures 1 and 2).

At the bottom of the magazine holder 8, two sets of claws 12 are provided which can protrude into the interior of the magazine 10 from both sides. Each of these claws 12 has a tip end surface 12a.
is a slope that once recedes downward,
A spring 14 provided on the back side urges the magazine 10 inside, and the tip inclined surface 12
The upper side of a is made to protrude into the lower part of the magazine 10. A pin 16 is attached to each pawl 12 in a direction perpendicular to the direction of movement of the pawl (left and right in FIG. 1), and a notch 18a at the top of the lever 18 is engaged with this pin 16. Further, the lower part of the lever 18 is fixed to a rod 20 provided below each of the two claws 12 on the same side. Therefore, when one pawl 12 on each side moves forward and backward, the other pawl 12 also moves forward and backward at the same time via the rod 20, lever 18, etc.

Below the magazine 10, the lead frame 7 conveyed by the conveyor belt 6 is placed in the magazine 1.
A push-up member 22 that is pushed up and inserted into the inside of the housing is disposed. The push-up member 22 is the lead frame 7
It has a plate 24 which is wide in the longitudinal direction (horizontal direction in FIG. 4), and two plates 26 and 28 fixed to both sides of the lower part of this plate 24.
An elevating member 30 is disposed on the side of one of the two lower plates 26, 28 (on the right side in FIG. 3). The elevating member 30 can be raised and lowered by being guided by a slide rail 34 fixed to an adjacent machine frame 32, and a cam rotated by a motor 37 is connected to the elevating member 30 via a cam follower 36 attached to the lower part of the elevating member 30. It ascends and descends along the contour of 38.

Further, a guide groove 40 extending in the front-rear direction (left and right in FIG. 4) is formed in the plate 26 on the right side of FIG. slide rail 4
2 are fitted. Therefore, the push-up member 22 is
It can be moved up and down integrally with the elevating member 30 by the elevating mechanism consisting of the cam follower 36 and the cam 38 of the elevating member 30, and it can also be relatively moved in the front and rear direction along the slide rail 42 of the elevating member 30. It's becoming like that.

On the side of the other plate 28 (left side in FIG. 3) of the push-up member 22, a reciprocating member 46 that is movable in the front-rear direction is provided. A guide groove 48 extending in the front-rear direction is formed in the advancing/retracting member 46.
A slide rail 50 fixed to the machine frame 32 fits into this guide groove 48 . A cam follower 52 is attached to the lower part of this reciprocating member 46, and the slide rail 52 of the machine frame 32
It is designed to be moved back and forth in the front and rear directions along 0.

Further, a vertically elongated hole 56 (see FIG. 4) is formed in the plate 28 on the left side of FIG. 3 of the push-up member 22, and the advancing and retracting member 46
A roller 58 attached to the roller 58 is fitted. Therefore, the push-up member 22 moves with respect to the advancing and retreating member 46.
In the vertical direction, a cam follower 52 of the advancing/retracting member 46
They are moved integrally by a reciprocating mechanism consisting of a cam 54 and a cam 54.

A lead frame 7 is provided at the upper end of the push-up member 22.
A push-up plate 60 having a length slightly shorter than the full length of 6
2 is installed. As shown in FIG. 4, this protrusion 62 can engage a part of the pawl 12 when it is raised, and when it moves slightly in the horizontal direction, it can engage with a part of the pawl 12.
It has a position and size such that the engagement with 2 is released. The conveyor belt 6 is divided into front and rear parts so that the projections 62 do not interfere with each other when the push-up member 22 moves up and down.

The operation of the lead frame storage device having the above configuration will be explained. When the lead frame 7 is conveyed to the lower part of the magazine 10 by the conveyor belt 6, the elevating member 30 is raised by the rotation of the cam 38 constituting the elevating mechanism, and the push-up member 22 is also raised together with this.

When the lead frame 7 is placed on the push-up plate 60 at the upper end of the push-up member 22 and pushed up, the protrusion 62 protruding slightly upwards from the lead frame 7 reaches the claw 12 before the lead frame 7. The claw 12 is engaged with the tip inclined surface 12a of the claw 12, and moves the claw 12 backward as it rises.

The claws 12 that directly engage with the protrusions 62 and retreat are the one set on the right side in FIGS. 2 and 4, but the other set of claws 12 (on the left side in the same figures) also have the same so that they are simultaneously retracted via lever 18 and rod 20. The lead frame 7 is pushed up and inserted into the magazine 10 by passing between the claws 12 that have retreated to the outside of the magazine 10 in this manner.

The push-up member 22, which has been raised by the maximum stroke of the cam 38, then moves up and down the cam 54 that constitutes the advancing/retracting mechanism.
The claw 1 of the protrusion 62 moves together with the reciprocating member 46, which advances to the right in FIG.
The engagement from 2 is released.

As a result, the claw 12 closes under the lead frame 7 pushed up into the magazine 10 by the force of the spring 14, and the push-up member 22
The lower surface of the lead frame 7 is supported by the claws 12 while the lead frame 7 is lowered and retreated as the lead frames 8 and 54 rotate and returns to the origin.

By repeating this operation, the lead frames 7 are sequentially stored into the magazine 10.

For example, if two magazines are set and automatically switched, each magazine has a magazine holder, so when a lead frame is fully stored in one magazine, it will be empty while being supported by the claws. The magazine is changed over, and then the lead frame begins to be stored.

As described above, the device of the above embodiment has a high storage capacity because the storage time and magazine exchange time are short, and since the lead frame does not come into direct contact with the claw, there is no risk of deformation of the lead frame.
Even when it is used for various lead frames, it is easy to use it as it can be done by adjusting the width of the magazine holder and replacing the push-up plate. Moreover,
Even in the case of a thin lead frame, since the mold surface can be supported by the claws, various effects such as a wide range of application of the lead frame can be obtained.

Note that the contours of both cams 38 and 54 are not limited to those shown in the drawings, and may be such that the protrusion of the push-up member engages with the pawl to open it, and then disengages and closes the pawl.

[Effects of the invention] As described above, according to the invention, the lead frame can be stored efficiently with an extremely simple structure, and moreover, as in the case where the lead frame directly contacts the support claw and is pushed open, There is no risk of deformation of the lead frame.

[Brief explanation of the drawing]

1 to 4 show a lead frame storage device according to an embodiment of the present invention, in which FIG. 1 is a partial sectional front view of the storage section, FIG. 2 is a partial sectional side view of the storage section, and FIG. 3 is a partial sectional side view of the storage section. 4 is a front view of the drive unit, and FIG. 4 is a side view of the drive unit. 7...Lead frame, 10...Magazine, 1
2...Support member (claw), 14...Spring, 2
2... Push-up member, 36, 38... Lifting mechanism, 5
2, 54... Advance/retreat mechanism, 62... Engagement portion (protrusion).

Claims (1)

[Scope of utility model registration request] A push-up member that pushes up and inserts lead frames sequentially from below into the magazine, a lifting mechanism that moves the push-up member up and down, and a support member that supports the lowest lead frame by protruding its tip into the magazine. In the lead frame storage device, the support member is biased toward the inside of the magazine by a spring, and the push-up member is provided with:
An engaging portion that engages with the support member to move the support member back when raised is provided, and an advancement/retraction mechanism that moves the push-up member forward and backward to disengage the engagement portion from the support member. A lead frame storage device featuring: