JPH08330334A - Work feeder - Google Patents

Abstract

PURPOSE: To feed a work surely piece by piece by elevating a rotator from below a work to a position lower than the lower surface of a work to be fed but higher than the lower surface of a work not to be fed tightly touching the work to be fed. CONSTITUTION: A work separating section comprises a separation roller 22 rotatable about an oscillation shaft 11, a coupler 8 coupling two rollers, and a belt 9 entraining about two rollers. When works are left while overlapping tightly without abutting against the separation roller 22, the coupler 8 at the work separating section is turned about the oscillation shaft 11 in order to elevate the separation roller 22. Consequently, the separation roller 22 comes into contact with a lead frame 2 to impart a frictional force in the rotation direction of the separation roller 22 to the works thus separating the work piece by piece. Consequently, even wet works where the packages are touching tightly can be separated easily and the work can be fed stably piece by piece at all times.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a work supply device for transferring works which are aligned and stacked and supplied to the next process one by one, and mainly relates to a deburring device for a lead frame by jetting high pressure water. In developing the wet lead frame (work) after the electrolytic treatment, it is developed as a lead frame supply technology for preventing the lead frame from being taken in two pieces and reliably sending each piece to the next step.

[0002]

2. Description of the Related Art In a deburring device for a lead frame by jetting high-pressure water, electrolytic treatment is carried out in order to improve the deburring performance such as lowering the jetting pressure and increasing the processing speed. Then, after the electrolytic treatment, the lead frame is supplied to the injection unit of the deburring device. However, if the lead frame is wet immediately after the electrolytic treatment, the packages will come into close contact with each other, and several lead frames will be sent to the jetting section to damage the lead frame or stop the machine.

As a general countermeasure for solving this problem, a means as shown in FIG. 12 has been adopted. The work supply device shown in FIG. 12 has lead frames 2 that are aligned and stacked in a magazine 1 and supplied.
Suck the 3 parts of the package with the vacuum pad 4,
Claws 5 are hooked between the packages 3 of the lead frame 2 and air is blown to the lead frame 2 by an air blow nozzle 6 provided separately to separate them.

[0004]

However, when the claws 5 are inserted between the packages 3 of the lead frame 2 which have been in close contact with each other, when the second lead frame 2 is bent upward, the claws 5 are inserted into the lead frame 2. When the lead frame 2 does not hang on the first lead frame 2 and cannot be separated, or when the first lead frame 2 is bent below the package 3, there is a risk that the claw 5 hooks on the first lead frame 2 and damages the work. It was Further, even if air is blown, it may not be possible depending on the contact area of the package 3,
It was not a perfect solution to the problem.

Further, even when the lead frame 2 can be stably supplied by the above means, the air consumption for separation is large, and steps for inserting the claws 5 and blowing air are required, resulting in cost reduction. It caused new problems such as ups and downs.

Therefore, according to the present invention, in order to separate the closely attached package 3, a drying process such as air blowing is not provided, and a sharp object such as a claw 5 or a wedge is not used, and the lead frame is not used. It is an object of the present invention to provide a work supply device capable of reliably sending out a work piece by piece without being affected by the bending of 2.

[0007]

In order to solve the above problems, the present invention is provided with a suction transfer unit for taking out a work from a magazine and moving it to the next step, and a suction transfer unit provided outside the magazine in a position close to the upper end opening, and fixed. In a work supply device including a rotating body that can move up and down within a range and that rotates in a magazine direction, the work is transferred to the rotating body by a suction transfer unit, and the rotating body is supplied from below the work to the lower surface of the supply target work. Lowered to a position higher than the lower surface of the non-supply target work that is in direct contact with the work, and then moves the work upward, and further controls the rotating body so that the center part rises to the same position as the top opening of the magazine. It was decided to.

[0008]

Embodiments will be described below with reference to the illustrated embodiments. Figure 1
It is a front explanatory view showing the work supply device concerning the present invention.
The work supply device according to the present invention includes a suction transfer unit and a work separation unit. The suction transfer unit is a mechanism that takes out the work from the magazine 1 and moves it to the next process, and is the same as the conventional suction transfer unit having the vacuum pad 4 except for the control operation. On the other hand, the work peeling unit is installed outside the magazine 1 so as to be vertically movable at a position close to the upper end opening,
This mechanism has a rotating body that rotates in one direction of the magazine (opposite to the work moving direction) as an essential element.

The operation of the suction transfer section will be described. As shown by the thick arrow in FIG. 1, the vacuum pad 4 is moved from the upper standby position toward the work in the lower magazine 1 at a designated position (usually from the upper end of the magazine 1 to the work). (Several sheets above), lift the elevator 7 to suck the work, and after receiving the suction confirmation signal, the elevator 7 moves down and the vacuum pad 4 moves horizontally toward the work peeling part and peels. After the work is completed, the work is further raised and moved to the position above the next process position, and is lowered to the work supply position to release the suction and supply the work.

As shown in FIG. 1, the first embodiment of the work separating portion is a drive roller 1 which rotates about a swing shaft 11.
2 and a peeling roller 22 that rotates about a shaft 21;
The unit is basically composed of a connecting body 8 connecting two rollers and a belt 9 stretched between the two rollers. The drive roller 12 is rotated by a motor, and the belt 9
The peeling roller 22 connected by means of follows.

The peeling roller 22 rotates in the direction toward the magazine 1 (the direction opposite to the clockwise rotation in FIG. 1). This rotation direction is opposite to the movement direction of the work. Further, the connecting body 8 can rotate about the swing shaft 11, and the peeling roller 22 attached to the tip of the connecting body 8 is moved up and down.

The details of the first embodiment of the work peeling section are shown in FIG.
3 is a side view and FIG. 3 is a plan view. In both cases, the auxiliary table 10 is installed with the cutout window 13 formed so as not to obstruct the vertical movement of the peeling roller 22.
In the side view of FIG. 2, the lead frame 2 and the vacuum pad 4, which are works, are drawn to clarify the positional relationship. However, in the plan view of FIG. 3, these are omitted and only the work peeling portion is shown. ing.

In the second embodiment of the work peeling section, the belt 9 is not used to drive the peeling roller 22,
As shown in the side view of FIG. 4 and the plan view of FIG. 5, the drive roller 14 that rotates independently of the swing shaft 11 and the peeling roller 22 that rotates about the shaft 21 are arranged in contact with each other. Therefore, when the drive roller 14 rotates by the motor, the peeling roller 22 contacting the drive roller 14 is driven to rotate in the opposite direction. Above and below the peeling roller 22,
As in the first embodiment, it may be possible to use the swing shaft 11 or a separate lifting means.

Next, a first operation example of the work supply device using the work peeling section of the first embodiment will be described. First, as shown in FIG. 6, the auxiliary table 10 is installed beside the upper end opening of the magazine 1, and the upper end of the peeling roller 22 is installed above the upper opening of the magazine 1 by two to three workpieces. In this state, the vacuum pad 4 stops descending to the designated position shown in FIG. 6, and the elevator 7 rises,
The work is adsorbed on the Bacoum Pat 4. After that, when the elevator 7 descends and enters the state of FIG. 6, a large number of works may be lifted at once due to the close contact between the packages 3 wet with water.

Next, as shown in FIG. 7, the work adsorbed by the vacuum pad 4 is slid to the peeling roller 22 side without changing the height. When the work hanging below the auxiliary table 10 or the peeling roller 22 or the tip of the bent lead frame 2 is located below these, the magazine 1 or the auxiliary table 10 and the peeling roller 22 are contacted and peeled off. To fall.

FIG. 8 shows a state in which the work remains in contact with the peeling roller 22 without overlapping and overlapping. Here, the connecting body 8 of the work peeling section is rotated around the swing shaft 11 to raise the peeling roller 22. As a result, the peeling roller 22 and the lead frame 2 are brought into contact with each other, and the workpieces given the force in the rotation direction of the peeling roller 22 due to the friction between the peeling rollers 22 are peeled one by one. FIG. 9 shows the state immediately after peeling.

The vacuum pad 4 moves vertically upward at a position where the upper part of the peeling roller 22 is lower than the lead frame 2 of the work which is sucked by the vacuum pad 4 and higher than the lead frame 2 of the second work (FIG. 10). ).
After that, the central portion of the peeling roller 22 moves to the same position as the upper end portion of the inner wall of the magazine 1, and at that time, the work is dropped into the magazine 1. FIG. 11 shows this state. After that, the peeling roller 22 returns to the original position and the one cycle is completed.

Next, a second operation example of the work supply device using the work separating unit of the first embodiment will be described with reference to FIGS. 13 to 17. The difference from the operation example described above is due to the difference in the standby position of the peeling roller 22. First, FIG.
The auxiliary table 10 is installed beside the upper opening of the magazine 1 as shown in FIG.
It is installed so that it is located below, that is, below the upper opening of the magazine 1. Vacuum pad 4 in this state
Will stop descending to the designated position shown in FIG. 13, the elevator 7 will rise, and the work piece will be adsorbed to the Bacoum Pat 4. After that, when the elevator 7 descends and the state shown in FIG. 13 is reached, a large number of works may be lifted at one time.

Next, as shown in FIG. 14, the work adsorbed by the vacuum pad 4 is slid above the peeling roller 22 without changing the height. The work hanging below the auxiliary table 10 comes into contact with the magazine 1 and the auxiliary table 10, separates, and falls. The auxiliary table 10 is particularly useful in the second operation example. That is, when the peeling roller 22 is on standby below and the workpiece has already slid out of the magazine 1 and spontaneous fall occurs, the peeling roller 22 is held on the auxiliary table 10. As described above, when the work is held on the auxiliary table 10, the peeling roller 22 moves up to come into contact with the lower surface of the work and the rotational force of the peeling roller 22 can return the work into the magazine 1. is there.

In FIG. 15, the connecting body 8 of the work peeling section is rotated around the swing shaft 11 and the peeling roller 22 is raised. As a result, the peeling roller 22 and the lead frame 2 come into contact with each other,
The workpieces, which are given a force in the rotation direction of the peeling roller 22 by the friction between the two, are peeled one by one. Peeling roller 2
The upper part of 2 moves vertically upward at a position (position shown in FIG. 16) lower than the lead frame 2 of the work directly sucked by the vacuum pad 4 and higher than the lead frame 2 of the second work (position shown in FIG. 16). . After that, the central portion of the peeling roller 22 moves to the same position as the upper end portion of the inner wall of the magazine 1, and at that time, the work is dropped into the magazine 1. FIG. 17 shows this state. After that, the peeling roller 2
2 returns to the original position and the one cycle ends.

[0021]

Since the present invention is constructed as described above, the following effects are exhibited. First, in the present invention, the lead frame 2 is brought into lateral contact with a rotating body that rotates in the direction opposite to the work transfer direction, or the rotating body is raised from below the package 3 and brought into contact with the lead frame 2. Since the work is peeled off, even if the work 3 is a wet work and the packages 3 are in close contact with each other, the work is easily peeled off, and the work can always be stably supplied one by one. In particular, according to the present invention, since the work pieces that are in close contact with each other due to moisture or the like are not separated in the vertical direction but are separated in the horizontal direction, the separation of the close work pieces is easier, and the strain amount of the lead frame 2 is reduced. The work can be taken out one by one without fail.

The rotating body is rotating in the direction of the magazine 1, and the central portion of the rotating body having the maximum width is the magazine 1.
Since the work can be lifted to the same position as the upper end opening, the works aligned in the magazine 1 and not dropped will be accommodated in the magazine 1 in an aligned manner. As a result, the next work supply operation is smoothly performed.

Secondly, according to the present invention, by adjusting the stop position and the vertical movement range of the rotating body and the vertical movement of the vacuum pad 4, it is possible to cope with the difference in the shape of the lead frame 2 and the position and thickness of the package 3. As a result, one work supply device can handle many works and the device can be easily adjusted.

[Brief description of drawings]

FIG. 1 is an explanatory front view showing a work supply device according to the present invention.

FIG. 2 is a side view showing an embodiment of a work peeling section.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view showing another embodiment of the work peeling section.

FIG. 5 is a plan view of the same.

FIG. 6 is an explanatory diagram when the work is lifted in the first operation example of the supply operation.

FIG. 7 is an explanatory diagram of the same horizontal movement.

FIG. 8 is an explanatory diagram when the horizontal movement is stopped.

FIG. 9 is an explanatory diagram when peeling a work.

FIG. 10 is an explanatory diagram when the work is again lifted and stopped.

FIG. 11 is an explanatory diagram of a re-raised state of the rotating body.

FIG. 12 is a partial cross-sectional perspective view showing a conventional work supply device.

FIG. 13 is an explanatory diagram when the work is lifted in the second operation example of the supply operation.

FIG. 14 is an explanatory diagram when the work is horizontally moved.

FIG. 15 is an explanatory diagram during the ascent of the rotating body.

FIG. 16 is an explanatory diagram when the rotor is temporarily stopped.

FIG. 17 is an explanatory diagram when the rotary body is lifted again.

[Explanation of symbols]

 1. ． ． ． ． Magazine 2. ． ． ． ． Lead frame 3. ． ． ． ． Package 4. ． ． ． ． Vacuum pad 5. ． ． ． ． Nails 6. ． ． ． ． Air blow nozzle 7. ． ． ． ． Elevator 8. ． ． ． ． Connected body 9. ． ． ． ． Belt 10. ． ． ． Auxiliary table 11. ． ． ． Swing shaft 12, 14. Drive roller 13. ． ． ． Notch window 21. ． ． ． Axis 22. ． ． ． Peeling roller

Claims (1)

[Claims] 1. A suction transfer unit for picking up a work from a magazine and moving it to the next process, and a suction transfer unit outside the magazine, which is installed in a position close to the upper end opening, can move up and down within a certain range, and rotate in the magazine direction. In the work supply device including a rotating body, the work is transferred to the rotating body by the suction transfer unit, and the rotating body is lower than the lower surface of the work to be supplied from below the work and lower than the lower surface of the non-supply target work that is directly adhered to the work. A work supply device characterized in that the work is moved up to a high position, then the work is moved upward, and further the rotating body is controlled so as to be lifted up to the same position as the upper end opening of the magazine.