JP3451132B2 - Lead frame take-out device - Google Patents

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, when the lead frames are processed in a laminated state, the molds are adhered to each other due to the surface tension of the liquid, especially in the molded lead frame. In this case, the vacuum pad is used for the subsequent process. If the lead frame at the upper end is picked up and lifted with such a tool, it may lift two or three sheets at the same time, which causes a problem. Therefore, it is necessary to separate them one by one by another device at the time of 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.

[0005]

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.

[0007]

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. A claw device; and an advancing / retracting means for laterally sliding the claw device; and the upper frame is horizontal from the outlet.
Make a recess to lock the rear part of the moved one lead frame.
And the pawl device swings on the horizontal axis toward the advancing / retreating means.
A frame with a claw that is freely supported and a tip of the frame
Touch the upper surface of the lead frame mold that is
It was configured to have a roller in contact with it.

According to a second aspect of the present invention, in the lead frame take-out device, the front end side of the frame is held at the forward end position of the pawl device.
The structure has a lifting means.

[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, the lead frame under the lead frame because it does not come out from the outlet, only one of the upper end can not be horizontal slide is picked. Further, the lead frame according to claim 1.
In the ram take-out device, the pawl device is a roller by a horizontal axis.
Is swingable in the vertical direction and can be locked with this pawl device.
If the lead frame is slid sideways by the advancing / retreating means,
After moving the lead frame over the recess of the upper frame,
It falls into the part and is locked. After this, remove the claw device
When returning to the outlet position, the roller rolls on the mold.
Do not pull the lead frame back to the original position.

In the lead frame take-out device according to the second aspect of the present invention, since the pawl device is lifted at the forward end position, the lateral slide mechanism is used.
Of the molded lead frame without contact with the molded lead frame.
Even if the thickness is thin and the engagement with the recess on the upper frame side is shallow,
Do not pull in the lead frame when returning.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 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 shows an operating state of a pawl device. FIG.

First, the structure will be described.

The lead frame take-out device of this embodiment is
The electric lift device 1, the upper frame 2, the pawl device 3, and the advancing / retreating means 4 are the main components.

The electric lift device 1 serves as a pushing-up means for the lead frame 5, and includes a rod 10 to be pressed against the lower end of the laminated lead frame, a screw shaft for moving the rod 10 up and down, 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.

Then, each of the guide frames 14, 1
In the assembled state of this guide frame, the upper portions of the inner surfaces of the guide frames 5, 16 and 17 are narrowed and the lower portions are inclined toward the enlarged side (skirt shape) in order to align the rising lead frame with the center of the outlet 13. Has been.

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 adjusting 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. The screw shafts 21 and 22 are separated from each other by the central portion. It has a reverse thread. Also, these screw shafts 21, 22
Pulleys 23 and 24 are fixed to one end side of 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. In addition, the machine frame 1 is mounted on the board 36.
The air cylinder 37 provided on the second side is connected.

The air cylinder 37 has a sensor (not shown) for the pawl device 3 to slide the lead frame 5 of the take-out port 13 until the mold 5a thereof is locked in the recess 32 of the receiving surface 31. ing.

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 the 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. . In the figure, 42a 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 long side adjustment guide frame 15,
Adjusting the interval of 16, loosening the bolt 19 and sliding the short side adjustment guide frame 15 to fix the short side fixed guide frame 1
Adjust the distance from 4.

After the adjustment, the lift frame 45 is used to lift 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 activated 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 sliding on the receiving surface 31 locks the mold 5a in the recess 32, and the air cylinder 37 retracts the pawl device 3 at this time. 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 conveyed 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 attracting surface, a small force is required, 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 protruding from the take-out port 13 is determined by the movement amount of the detection plate 44 provided on the frame pushed up by the mold 5a, the error is small and the one lead frame is always taken accurately. It can be performed.

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 an explanatory view showing the pawl device of the second embodiment, in which 50 is an air cylinder as a lifting means for lifting the tip side of the pawl device 3, and when the pawl device 3 is returned, It works to prevent the lead frame from returning. The 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 by the time the pawl device 3 is placed on the receiving port 13, the pawl portion 42 is lowered until it comes into contact with the approaching lead frame. 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. Therefore, the thickness of the mold is extremely thin and the recess 32 is formed.
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.

[0047]

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.

Since the lead frame moves in the shearing direction with respect to the suction surface between the molds and separates it, only a small force is required, and since the force is also transmitted through the mold, it can be reliably taken out without failure. And so on. Furthermore, the lead frame take-out device according to claim 1.
In this case, because of the above-mentioned configuration, this is necessary when returning the pawl device.
Even if the claw device is in contact with the mold, it works in the return direction.
Extremely small force transmission, lightweight and thin lead frame
Even if there is, the effect of not pulling back to the original position can be obtained.

Since the lead frame take-out device according to the second aspect has the above-mentioned structure , the lead frame take-out device does not operate when the pawl device is returned.
The mold is extremely thin because it is not in contact with the shield.
Make sure that you do not have to remove one lead frame even if it is not locked in the recess.
The effect that it can be taken out 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 means of retreat 5 lead frame 13 Exit 14 Fixed guide frame on the short side of the outlet 15 Adjusting guide frame on the short side of the outlet 16,17 Guide frame for adjusting the long side of the outlet 35 Slide body (advancing and retracting means) 37 Air Cylinder 38 Claw device frame 39 Support shaft of claw device 40 Claw device roller 41 Claw device locking part 43 Sensor for approaching means 50 Air cylinder (lifting means)

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) B65G 59/02 B65H 3/24 B65H 3/24 H01L 21/50

Claims (2)

(57) [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 claw device that is detachably locked to a lead frame that is placed above the mouth and that is just above the take-out port ; advancing and retracting means that horizontally slides the claw device; and the upper frame is horizontal from the take-out port. One reed move
The claw device has a recess for locking the rear part of the ram, and
With a pawl swingably supported on the advancing / retreating means side by a horizontal shaft
The frame and the Lee that is pivotally supported by the tip of the frame
A lead frame take-out device having a roller that abuts on the upper surface of the mold of the lead frame. 2. A frame tip at the forward end position of the pawl device.
The lead frame takeout device according to claim 1, further comprising lifting means for lifting the end side .