JPH07309442A - Lead frame taking-out device - Google Patents

Abstract

PURPOSE:To provide a device by which layered lead frames wetted with water can be reliably taken out one by one. CONSTITUTION:A lead frame taking-out device is provided with a motor-driven lift device 1 to force up layered lead frames 5 a thickness quantity by a thickness quantity of a mold, an upper frame 2 which forms a taking-out port of the lead frames and is horizontally arranged above a layered position of the lead frames 5, a claw device 3 which is arranged above the taking-out port and is locked so as to be mountable on and demountable from the lead frame 5 forced up by a single sheet from the taking-out port and an advancing- retreating means 4 to laterally slide the claw device 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for taking out lead frames one by one.

[0002]

2. Description of the Related Art A lead frame has many steps in its manufacturing process because it is treated with a liquid such as pickling, washing with water and deburring. In the process of using this liquid, if the lead frame is processed in a laminated state, the molds will adhere to each other due to the surface tension of the liquid, especially in the molded lead frame. When picking up and picking up the lead frame, the two or three pieces may be picked up at the same time, which causes a problem. Therefore, it is necessary to separate each piece by a separate device when lifting.

Conventionally, as a device for separating the stacked lead frames one by one, when the lead frames are stacked and housed in a magazine, the lead frames are pushed up to a predetermined position and then the lead frames are separated from each other at that position. There was a device in which a spatula-shaped member was inserted between them to separate them.

[0004]

However, in such a conventional device, when the lead frames are narrowed because the lead frames are distorted or the thickness of the mold is thin, the gap between the lead frames is reduced. There was a problem that the spatula-shaped member could not be inserted and could not be separated.

The present invention has been made in order to solve the above-mentioned conventional problems, and the purpose thereof is to be able to reliably take out the lead frames, which are laminated by being wet with water, one by one. To provide a device.

[0006]

As a means for achieving the above object, in the lead frame take-out device according to claim 1 of the present invention, a pressing means for pressing the stacked lead frames by the thickness of the mold. An upper frame that forms an outlet for the lead frame and is horizontally arranged above the stacking position of the lead frame; detachably engageable with a lead frame that is located above the outlet and is one sheet above the outlet. The claw device and the advancing and retracting means for laterally sliding the claw device are provided.

According to another aspect of the present invention, there is provided a lead frame take-out device, wherein the upper frame has a recess for locking a rear portion of one lead frame horizontally moved from the take-out port, and the claw position is a horizontal axis for the advance / retreat. A frame with a claw that is pivotally supported on the means side and a roller that is supported by the tip of the frame and is in contact with the upper surface of the mold of the lead frame that is squeezed up are employed.

According to the third aspect of the present invention, there is provided a lead frame take-out device having a lifting means for lifting the frame front end side at the forward end position of the pawl device.

[0009]

In the lead frame take-out device according to the first aspect, the stacked lead frames are pushed up by the pushing-up means. Then, the pawl device is locked to the lead frame that is one sheet closer to the ejection port. This pawl device slides laterally with the lead frame locked when it is laterally slid by the advancing and retracting means after locking the lead frame.
At this time, since the lead frame below the lead frame does not come out of the take-out port, it cannot be laterally slid and only one of the upper ends is taken out.

In the lead frame take-out device according to the second aspect of the present invention, the roller of the pawl device is swingable in the vertical direction by the horizontal shaft. When the lead frame locked by the pawl device is laterally slid by the advancing / retreating means, After the lead frame has moved to above the concave portion of the upper frame, it falls into the concave portion and is locked. After that, when the pawl device is returned to the original position (take-out port position), the roller rolls back on the mold and returns, so that the lead frame is not retracted to the original position side.

In the lead frame take-out device according to the third aspect of the present invention, since the pawl device is lifted at the forward end position, it does not come into contact with the laterally slid lead frame, and the thickness of the mold is thin so that it is engaged with the recess on the upper frame side. Even if the stop is shallow, the lead frame is not pulled in when the pawl device is returned.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a vertical sectional view showing a lead frame take-out device of a first embodiment, FIG. 2 is a plan view of the same, FIG. 3 is an explanatory view showing a take-out port adjusting structure, and FIG. 4 is an explanatory view showing an operating state of a pawl device. is there.

First, the structure will be described. The lead frame takeout device of the present embodiment mainly includes an electric lift device 1, an upper frame 2, a pawl device 3, and an advancing / retreating means 4.

The electric lift device 1 serves as a pushing-up means for the lead frame 5, and includes a rod 10 that is pressed against the lower end of the laminated lead frame, a screw shaft that raises and lowers the rod 10, a speed reducer, and an electric motor. And a drive unit 11 that is provided and is erected at the bottom of the machine frame 12. When the laminated lead frame is set on the rod 10, the drive unit 11 raises the laminated lead frame at a high speed until the upper end of the laminated lead frame is close to an ejection port 13 described later, and then raises at a low speed to stop positioning. . After that, the lead frame is intermittently raised by the thickness of the mold.

The upper frame 2 is an outlet 1 for separating only the upper lead frame from the laminated lead frame.
3 is formed above the electric lift device 1, and a short side fixed guide frame 14 for guiding one short side of the lead frame to be taken out so as to cope with various sizes of the lead frame. , A short side adjusting guide frame 15 for adjusting the distance to the short side fixed guide frame 14 to guide the other short side of the lead frame, and a long side of the lead frame moving toward or away from each other. Long side adjustment guide frames 16 and 17 for guiding the respective sides. Since the guide frames 14, 15, 16 and 17 align the rising lead frame with the center of the take-out port 13 in the upper part, the upper part of each inner surface narrows and the lower part expands in the assembled state of the guide frames ( It is provided with an inclination to a skirt.

The short side fixed guide frame 14 is fixed to one short side of an opening frame 18 provided at the upper end of the machine frame 12, and the short side adjustment guide frame 15 is the other short side of the opening frame 18. The bolt insertion hole 20 is formed in a long hole facing the short side fixed guide frame 14 direction. A pair of screw shafts 21 and 22 are rotatably supported on both sides of the opening frame 18 at right angles to the long side of the opening frame 18. Has been formed. Further, pulleys 23, 24 are fixed to one end sides of the screw shafts 21, 22 and are connected by a timing belt 25. Further, a knob 26 for turning by hand is provided on the other end side of one screw shaft 21.

The long side adjustment guide frame 1
6, female threads 27 are provided on both ends, and opposite long side adjustment guide frames 17 are provided with reverse-threaded female threads 28 on both ends, which are screwed in parallel with the screw shafts 21 and 22, respectively. Has been done.

Each of the guide frames 14, 15, 16,
Below the 17 is the lead-out port 1 in the size of the lead frame.
Guides 30 are provided which are fitted to surround the upper end opening of the magazine 29 set on the electric lift device 1 when the number 3 is adjusted.

Further, the long side adjustment guide frame 16
The upper part is provided on the receiving surface 31 of the lead frame which is extended outward in the same plane with respect to the ejection port 13 and is fed by the pawl device 3 described later. The receiving surface 31 is provided with a recess 32 that locks the long side of one lead frame, and through holes 33 that communicate with the outside air at substantially the same pitch as the mold of the lead frame. .

The pawl device 3 locks the lead frame approaching from the take-out port 13 and sends the lead frame to the receiving surface 31 by the operation of the advancing / retreating means 4.
A single lead frame is taken out from the stacked lead frames. First, the advancing and retracting means 4 side will be described. The machine frame 12 on the short side fixed guide frame 14 side.
In addition, the pair of guide rails 34 are fixed in parallel with the direction of the receiving surface 31 when viewed from the outlet 13 side. A slide body 35 is slidably mounted on the guide rail 34, and a board 36 extending parallel to the long side of the take-out port 13 is fixed to the slide body 35. An air cylinder 37 provided on the machine frame 12 side is connected to the substrate 36. The air cylinder 3
7 shows the lead frame 5 of the takeout opening 13 of the claw device 3,
The mold 5a has a sensor (not shown) for sliding the mold 5a in the recess 32 of the receiving surface 31 until the mold 5a is locked.

A long frame 38 is arranged on the substrate 36 along the long side of the take-out port 13, and an intermediate portion of the frame 38 is vertically rotatable by a support shaft 39 provided in parallel with the take-out port 13. Supported by.

At the tip of the frame 38, the outlet 1
3, a roller 40 that contacts the upper surface of the mold 5a of the lead frame, and a recess that holds the roller 40 at the tip and locks the rear surface of the mold 5a when the roller 40 contacts the mold 5a. A claw portion 42 having a locking portion 41 formed as is detachably attached. A plurality of claw portions 42 are prepared corresponding to the distance from the upper surface of the mold 5a to the upper surface of the lead frame portion 5b, which is different depending on the size of the lead frame, and the setup is changed every time the lead frame is changed. 42 in the figure
a is a bolt tightening portion for setup change.

Reference numeral 43 in the drawing denotes a sensor, which detects the operation of a detection plate 44 provided at the rear end of the frame 38 and controls the electric lift device 1. That is, the lead frame 5 is pushed up by the electric lift device 1 and the roller 4 of the pawl device 3 is moved.
When 0 is pushed up, the frame 38 rotates around the support shaft 39, and the detection plate 44 moves downward. At this time, the sensor 43 outputs a stop signal to the electric lift device 1 to end one push-up operation.

Reference numeral 45 denotes an elevating device for the opening frame 18 and the machine frame 12 around it, which is moved up and down when the magazine 29 is attached and detached.

Next, the operation will be described. First, the knob 26 is rotated according to the size of the lead frame to adjust the distance between the long side adjustment guide frames 15 and 16, and the bolt 19
Is loosened and the short side adjustment guide frame 15 is slid to adjust the gap between the short side fixed guide frame 14.

After the adjustment, the lift frame 45 is used to move the opening frame 1
8 is raised, the magazine 29 is set on the electric lift device 1, and the opening frame 18 is lowered. As a result, the upper part of the magazine is fixed by the guide 30.

When the rod 10 is lifted by the drive unit 11, the lead frame mold 5a pushes up the roller 40 of the pawl device 1 to rotate the frame 38, and the lead frame 5 is completely removed from the take-out port 13 by one. The sensor 43 detects the approaching time point through the movement of the detection plate 44, and stops the drive unit 11. At this time, the locking portion 41 of the claw portion 42 is arranged on the rear side surface of the mold 5a.

After only one lead frame 5 comes up from the take-out port 13, the air cylinder 37 is operated and the pawl device 3
Is slid from the electric lift device 1 (on the magazine 29) to the receiving surface 31 side. At this time, the lead frame immediately below receives the lateral movement force because the mold part is adhered by the surface tension of water, but the lead frame is attached to the long side adjustment guide frame 16 forming one side of the outlet 13. Since the frame portion 5b abuts and further movement is prevented, only the lead frame locked to the pawl device 3 is forcibly slid.

The lead frame 5 slid on the receiving surface 31 locks the mold 5a in the recess 32, and at this time, the air cylinder 37 retracts the pawl device 3. In this case, since the roller 40 rolls back on the mold 5a and returns, even if the mold 5a is thin and the locking force to the recess 32 is weak, the lead frame is not pulled back to the ejection port 13 side. The lead frame 5 on the receiving surface 31 is transported to a deburring side or a drying side by a vacuum pad of another device.
The through hole 33 of the recess 32 is for notifying the absence of the lead frame during suction of the vacuum pad.

As described above, in the present embodiment, the lead frames wet with water and adsorbing each other can be reliably taken out one by one. Since the lead frame is moved by moving it in the shearing direction with respect to the suction surface, a slight force is sufficient, and since the force is also exerted through the mold, it can be reliably taken out without failure. Since the measurement of one lead frame approaching from the take-out port 13 is determined by the amount of movement of the detection plate 44 provided on the frame pushed up by the mold 5a, there is little error, and one sheet is always taken accurately. You can Since the take-out port 13 can be adjusted to an optimum size according to the size of the lead frame, it is possible to prevent unnecessary movement of the lead frame and prevent malfunction.
The magazine 29 can be always held at a normal position with respect to the take-out port 13.

Next, a second embodiment will be described. In this embodiment, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. FIG. 5 is the second
It is explanatory drawing which shows the nail | claw apparatus of an Example, 50 is an air cylinder as a lifting means which raises the front end side of the nail | claw apparatus 3, and when returning the nail | claw apparatus 3, in order to prevent return of a lead frame. It works. This air cylinder 50
Is fixed to the substrate 36 side, and the rod is connected to the frame 38. The pawl device 3 receives the lead frame 5 and the receiving surface 3
After being locked in the concave portion 32 of No. 1, the air cylinder 50 operates so as to pull up the claw portion 42 side of the frame as the timer times out. In this state, the pawl device 3 returns to the receiving port 13 side, and the pawl portion 42 is lowered until it comes into contact with the pressing lead frame by the time it is placed on the receiving port 13. A solenoid may be used instead of the air cylinder 50.

When the pawl device 3 of this embodiment is on the return side, the pawl device 3 returns without coming into contact with the slid lead frame.
Even if it is not possible to obtain a sufficient locking depth, the lead frame will not be returned to the opening side by the return of the pawl device.

The embodiments of the present invention have been described above.
The specific configuration of the present invention is not limited to this embodiment, and the present invention includes a design change and the like within a range not departing from the gist of the invention.

For example, the receiving surface 31 can be tilted in one direction or moved to another place after receiving the lead frame. Further, it is possible to connect with a belt conveyor or use a belt conveyor instead of the receiving surface 31.

[0035]

As described above, in the lead frame take-out device according to the first aspect of the present invention, since the lead frame is constructed as described above, the lead frames that are wetted by water and attracted to each other are surely secured one by one. Can be taken out. The lead frame moves in the shearing direction with respect to the suction surface between the molds and separates it, so it requires only a small amount of force, and since the force is also passed through the mold, it can be reliably taken out without failure. Is obtained.

In the lead frame take-out device according to the second aspect of the present invention, because of the above-mentioned structure, even when the pawl device is in contact with the mold when the pawl device returns, the force acting in the return direction is extremely small and lightweight. Thus, even if the lead frame is thin, the effect of not returning it to the original position can be obtained.

In the lead frame take-out device according to the third aspect of the present invention, since it has the above-mentioned structure, it is in a non-contact state with the mold when the pawl device is returned. The effect that the lead frames can be reliably taken out one by one is obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a lead frame takeout device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a lead frame take-out device according to a first embodiment.

FIG. 3 is an explanatory view showing an outlet adjusting structure of the first embodiment.

FIG. 4 is an explanatory diagram showing an operating state of the pawl device of the first embodiment.

FIG. 5 is an explanatory view showing an operating state of the pawl device of the second embodiment.

[Explanation of symbols]

 1 Electric lift device (approaching means) 2 Upper frame 3 Claw device 4 Advancement / retraction means 5 Lead frame 13 Ejection port 14 Short side fixed guide frame of ejection port 15 Short side adjustment guide frame of ejection port 16, 17 Ejection port Long-side adjustment guide frame 35 Slide body (advancing and retracting means) 37 Air cylinder (advancing and retracting means) 38 Frame of pawl device 39 Support shaft of pawl device 40 Roller of pawl device 41 Locking portion of pawl device 43 Sensor of push-up means 50 Air cylinder (lifting means)

Claims (3)

[Claims] 1. A push-up means that pushes up the stacked lead frames by the thickness of the mold; an upper frame that forms a take-out port of the lead frame and is horizontally arranged above the stacking position of the lead frames; A lead frame take-out, characterized by comprising: a claw device which is disposed on the upper part of the mouth and detachably engages with a lead frame that is one piece up from the take-out port; and a forward / backward means for laterally sliding the claw device. apparatus. 2. The upper frame has a recess for locking the rear part of one lead frame horizontally moved from the take-out port, and the claw position is a horizontal shaft so as to be swingable toward the advancing and retracting means side. 2. The lead frame take-out device according to claim 1, further comprising: a frame with a claw formed therein; and a roller that is supported by a tip of the frame and comes into contact with the upper surface of the mold of the lead frame that is pushed up. 3. The lead frame take-out device according to claim 2, further comprising lifting means for lifting the frame front end side at the forward end position of the pawl device.