JPH08157053A - Work machining/conveying device - Google Patents

Abstract

PURPOSE: To machine a work at the prescribed position with good positional accuracy in a machining section and quickly convey the work. CONSTITUTION: A lead frame 11 conveyed by an inlet side conveying device A is stopped directly before an upper die 12a and a lower die 12b by a stopper 42. When the lead frame 11 is stopped by the stopper 42, the first nip rollers 3a, 3b and additional nip rollers 4a, 4b are closed by a control device 40 to hold the lead frame 11, and the lead frame 11 is fed between the upper die 12a and the lower die 12b by a fixed quantity. Display machining is applied to the lead frame 11 between the upper die 12a and the lower die 12b, and the machined lead frame 11 is held by the second nip rollers 7a, 7b and is fed to an outlet side conveying device B side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work processing / conveying device for conveying and processing a work such as a lead frame,
In particular, it is an object of the present invention to provide a work processing / conveying device that can convey and process a work quickly and accurately.

[0002]

2. Description of the Related Art As a work processing / conveying device for conveying and processing a work such as a lead frame, those shown in FIGS. 5 and 6 are conventionally known. 5 and 6
As shown in FIG. 3, the conventional work processing / conveying apparatus includes an upper die 53 and a lower die 54 for depressing the lead frame 50, an inlet side conveying device 51, and an outlet side conveying device 5.
2 is provided. An inlet side arm 55 is provided on the inlet side of the upper die 53 and the lower die 54, and an outlet side arm 56 is provided on the outlet side of the upper die 53 and the lower die 54.

As shown in FIG. 6A, when the lead frame 50 is carried by the entrance carrier device 51, the entrance arm 55 descends and the rear end of the lead frame 50 is gripped by the entrance arm 55. It Next, as shown in FIG. 6B, the lead frame 5 is moved by the inlet side arm 55.
0 is fed to the upper die 53 and the lower die 54 side by a fixed size, and then the entrance side arm 55 is opened, and the lead frame 50 is depressurized between the upper die 53 and the lower die 54. (FIG.6 (c)). This operation is repeated a preset number of times.

After completion of the depressing process, the leading end of the lead frame 50 is gripped by the outlet side arm 56, the lead frame 50 is sequentially sent to the outlet side, and the inlet side arm 55.
Returns to the original position (FIGS. 6 (e) and 6 (f)). Next, a new lead frame 50 is carried by the entrance side carrier device 51, and the rear end of the lead frame 50 is at the entrance side arm 5.
5 and the above-described operation is repeated (FIG. 6).
(G) (h)).

As another work processing / conveying device, those shown in FIGS. 7 and 8 are known. As shown in FIG. 7A, pin holes 50a are formed in the work such as the lead frame 50 at equal intervals. By engaging the pin 61 of the pin feed jig 60 with this pin hole 50a and moving the pin feed jig 60 by a fixed size, the lead frame 50 is conveyed by a fixed size to the upper mold and the lower mold (Fig. 7
(B)). As shown in FIG. 7C, the lead frame 50
When the pin reaches a predetermined position, the pin feed jig 60 descends and the pin 61 is pulled out from the pin hole 50a. After that, the pin feed jig 60 returns to the original position in preparation for the next constant-size conveyance (FIG. 7D).

[0006]

As described above, as the work processing / transporting device, the device for transporting the lead frame 50 by the inlet arm 55 (FIGS. 5 and 6) and the pin 61 of the pin feeding jig 60 are used. Lead frame 50
There is a device (Fig. 7) for transporting. However, in the case of a device having an entrance side arm, it is necessary to return the entrance side arm 55 to the original position every time a plurality of lead frames 50 are sequentially transferred, and the transfer of the lead frame 50 is delayed by that time, and continuous transfer and There is a problem that it is not suitable for continuous processing.

Further, in the case of the device having the pin feed jig 60, the shape of the pin feed jig 60 having the pins 61 needs to be changed according to the type of the lead frame 50 as shown in FIG. Not only that, a great deal of labor and time is required for changing the pin feed jig 60. Further, it is necessary to return the pin feed jig 60 to the original position every time a plurality of lead frames 50 are sequentially conveyed, and the conveyance of the lead frame 50 is delayed by that time, which makes it unsuitable for continuous conveyance and continuous machining. .

The present invention has been made in consideration of such a point, and a plurality of lead frames can be quickly and continuously conveyed to an upper die and a lower die for accurate machining. It is an object to provide a work processing / transporting device.

[0009]

SUMMARY OF THE INVENTION According to the present invention, there is provided a processing section for processing a work, an inlet side transfer device provided on the inlet side of the processing section, and an outlet side transfer apparatus provided on the outlet side of the processing section. An apparatus, a first nip roller provided between the processing section and the entrance side transfer apparatus and holding and transferring a work openably and closably, and a work stopping means for temporarily stopping the work immediately before the processing section. A workpiece processing means for temporarily stopping the workpiece by the workpiece stopping means, holding the workpiece by closing the first nip roller, and sending the workpiece to the processing unit side by a first predetermined distance. -It is a transport device.

[0010]

The work conveyed by the entrance side conveying device is temporarily stopped immediately before the processing section by the work stopping means. Once the work is stopped by the work stopping means, the control unit closes the first nip roller to grip the work, and the first nip roller feeds the work a first predetermined distance to a predetermined position in the processing section. Next, the work is processed by the processing unit, and the work processed by the processing unit is sent out by the exit side transfer device.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 and 9 to 11 are views showing an embodiment of a work processing / conveying apparatus according to the present invention.

In FIG. 1, the work processing / conveying apparatus includes a processing portion including an upper die 12a and a lower die 12b for depressing the lead frame 11, and an upper die 1.
2a and the lower die 12b on the inlet side (upstream side), which is provided on the inlet side conveying device A including a plurality of drive rollers 1, and the upper die 12a and the lower die 12b on the outlet side (downstream side). And an exit side transport device B including a plurality of drive rollers 15. Of these, the drive roller 1 is driven by the AC motor 2, and the drive roller 15 is driven by the AC motor 16.

Further, between the upper die 12a and the lower die 12b and the drive roller 1, there are provided first nip rollers 3a and 3b for holding the lead frame 11 in an openable and closable manner and conveying it. Lower mold 12b and drive roller 1
Second nip rollers 7a and 7b are provided between the second nip rollers 5a and 5 to open and close the lead frame 11 and convey it. Further, between the first nip rollers 3a and 3b and the upper die 12a and the lower die 12b, an additional nip roller 4a,
4b is provided, and the first nip rollers 3a, 3b and the additional nip rollers 4a, 4b are driven by the servomotor 6. Further, the second nip rollers 7a, 7b
Are driven by the servo motor 8.

Further, the first nip rollers 3a and 3b and the additional nip rollers 4a and 4 are provided at a substantially intermediate position of the entrance side conveying device A.
Sensors 9, 10 and 14 for detecting the tip end of the lead frame 11 are provided between the second nip rollers 7a and 7b and the outlet side transport device B, respectively.

Furthermore, the first nip rollers 3a, 3b
A stopper 42 that comes into contact with the leading end of the lead frame 11 and stops the stopper 42 is provided between the additional nip rollers 4a and 4b, and the stopper 42 is moved in the vertical direction by the drive unit 5.

The motors 2 and 16, the servomotors 6 and 8, the detection sensors 9, 10 and 14, and the drive unit 5 are provided.
Are connected to the control device 40.

Next, the inlet side conveying device A, the first nip rollers 3a and 3b, and the second nip rollers 7a and 7b will be described in more detail with reference to FIGS.

As shown in FIG. 2, the entrance side transfer device A is
It has frames 21 and 22 parallel to the transport direction, and the drive rollers 1 are installed inside the frames 21 and 22 at equal intervals.

A pulley 24 and a belt 25 are provided outside the frames 21 and 22 as a drive mechanism for the drive roller 1. The belt 25 is a drive transmission belt 26.
Is connected to the AC motor 2 described above. Further, the output end of the detection sensor 9 provided in the entrance side transport device A controls the AC motor 2 to control the lead frame 1.
It is electrically connected to the control device 40 so as to reduce the carrying speed of No. 1.

Further, in FIG. 3, the roller 3a and the additional nip roller 4a are a frame 31, which is parallel to the conveying direction,
It is supported by 32. A pulley 37 and a drive transmission belt 38 are provided outside the frames 31 and 32 as a drive mechanism for the rollers 3a and 4a, and the belt 38 is connected to the servo motor 6 described above. In addition, the rollers 3a and 4a are provided above the rollers 3a and 4a.
a, 4a and the roller 3 for gripping the lead frame 11
b and 4b are arranged so as to be vertically movable. Of these, the rollers 3a and 3b constitute the first nip rollers 3a and 3b, and the rollers 4a and 4b constitute the additional nip rollers 4a and 4b.

Further, the output end of the detection sensor 10 provided between the first nip rollers 3a and 3b and the additional nip rollers 4a and 4b is connected to the control device 40, and the servo motor 6 is controlled by the control device 40. The lead frame 11 is stopped and the first nip rollers 3a and 3b and the additional nip rolls 4a and 4b are controlled. The stopper 42 described above is arranged above the detection sensor 10.

Further, as shown in FIG. 4, the roller 7a is supported by frames 43 and 44 which are parallel to the carrying direction, and a pulley 47 is provided outside the frames 43 and 44 as a drive mechanism of the roller 7a. There is. This pulley 47
Is the servo motor 8 described above via the drive transmission belt 48.
It is connected to. A roller 7b for holding the lead frame 11 is provided above the roller 7a so as to be movable in the vertical direction, and the rollers 7a and 7b constitute second nip rollers 7a and 7b.

Next, the operation of this embodiment having such a configuration will be described with reference to the flow charts of FIGS.

First, the lead frame 11 is moved by the drive roller 1 of the entrance side conveying device A to the upper die 12a and the lower die 1.
It is transported to the 2b side. In this case, the drive roller 1 is driven by the AC motor 2. Next, in order to prevent the lead frame 11 from colliding with the stopper 42 and rebounding or deformation due to the collision, the detection sensor 9 detects that the lead frame 11 is approaching the stopper 42. Based on the signal from the detection sensor 9, the control device 40 drives and controls the AC motor 2 to reduce the feed speed of the lead frame 11.

Next, the lead frame 11 comes into contact with the stopper 42, which has been lowered in advance by the drive unit 5, and stops.
When the detection sensor 10 detects that the lead frame 11 is stopped at the stop position by the stopper 42, the control device 40 stops the AC motor 2 and the lead frame 11 is stopped.
Transportation stops. At the same time, the controller 40 closes the first nip rollers 3a and 3b to close the lead frame 11.
Is gripped (nipped) and the lead frame 11 is accurately fixed at the stop position.

Next, the drive unit 5 drives the stopper 42 to be raised by the control device 40, and at the same time, the servo motor 6 drives the first nip rollers 3a and 3b by the control device 40, and the lead frame 11 is fixed by one IC. Transport a quantity. In this way, the lead frame 11 becomes the upper mold 12
It is fed to a predetermined position between a and the lower die 12b.
During this time, the lead frame 11 moves the additional nip roller 4a,
4b, the lead frame 11 is also nipped by the additional nip rollers 4a and 4b.
By 4b, it is more reliably sent to a predetermined position between the upper die 12a and the lower die 12b.

Next, when the lead frame 11 is fed to a predetermined position between the upper die 12a and the lower die 12b, the first nip rollers 3a and 3b and the additional nip roller 4 are provided.
The a and 4b are opened and the lead frame 11 is released. Next, in the jig hole (not shown) of the lead frame 11,
The positioning pin 13 attached to the upper mold 12a is fed, and the lead frame 11 is positioned between the upper mold 12a and the lower mold 12b in units of microns. After that, the upper die 12a descends with respect to the lower die 12b, and the upper die 12a
The lead frame 11 is depressurized between the lower die 12b and the lower die 12b.

When the depressing process on the lead frame 11 is completed, the first nip rollers 3a and 3b and the additional nip rollers 4a and 4b are closed, and the lead frame 11 is nipped again and conveyed by a certain amount.

Next, the detection sensor 14 is used as the lead frame 1.
When the leading edge of No. 1 is detected, a detection signal is sent to the control device 40, and the control device 40 causes the second nip rollers 7a and 7b to be detected.
Is closed and the lead frame 11 is gripped. Next, the controller 40 drives the servo motor 8 and the second nip rollers 7a and 7b convey the lead frame 11 by a predetermined amount.

Next, the control device 40 opens the second nip rollers 7a and 7b to open the lead frame 11, and the lead frame 11 is depressurized again between the upper die 12a and the lower die 12b. Is given.

In this way, one lead frame 11
The depressing process is performed a predetermined number of times (for example, four times), and then the second nip rollers 7a and 7b are closed again, and the lead frame 11 is sent to the outlet side transport device B side.

Then, after the detection sensor 14 detects the rear end of the lead frame 11, the second nip rollers 7a, 7
b is opened and rotation is stopped.

On the other hand, when the detection sensor 10 no longer detects the lead frame, the stopper 42 is lowered by the drive unit 5 and stands by for the next lead frame 11. As described above, according to this embodiment, the lead frame 11 conveyed by the inlet side conveying device A is temporarily stopped by the stopper 42 to perform positioning, and then the first nip rollers 3a and 3b and the additional nip roller 4a, 4b
The lead frame 11 is nipped and conveyed by a predetermined amount to move the lead frame 11 to the upper die 12a and the lower die 12b.
And a predetermined position of the lead frame 11 between the upper die 12b and the upper die 12b can be depressurized.

[0034]

As described above, according to the present invention,
The work conveyed by the inlet side conveying device is temporarily stopped by the stopping means immediately before the processing unit, and then the first nip roller is closed to grip the work and the work is moved by the first predetermined distance to a predetermined position in the processing unit. Since it is sent, it is possible to process a predetermined portion of the work within the processing portion with high positional accuracy. Further, since the work is continuously conveyed from the entrance side conveying device to the processing portion via the first nip roller, the work can be conveyed and processed continuously and quickly.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a work processing / conveying device according to the present invention.

FIG. 2 is a detailed view of an entrance-side transfer device.

FIG. 3 is a detailed view of first and additional nip rollers.

FIG. 4 is a detailed view of a second nip roller.

FIG. 5 is a schematic view showing a conventional work processing / conveying device.

FIG. 6 is a view showing an operation of a conventional work processing / conveying device.

FIG. 7 is a schematic view showing another conventional work processing / conveying device.

FIG. 8 is a view showing an operation of another conventional work processing / conveying device.

FIG. 9 is a flowchart of a work processing / conveying device according to the present invention.

FIG. 10 is a flowchart of a work processing / conveying device according to the present invention.

FIG. 11 is a flowchart of a work processing / conveying device according to the present invention.

[Explanation of symbols]

 1 Drive Roller 2 AC Motor 3a, 3b First Nip Roller 4a, 4b Additional Nip Roller 6 Servo Motor 7a, 7b Second Nip Roller 8 Servo Motor 9,10 Detection Sensor 11 Lead Frame 12a Upper Mold 12b Lower Mold 14 Detection Sensor 15 Drive roller 16 AC motor

Claims (3)

[Claims] 1. A processing part for processing a work, an inlet side transfer device provided on an inlet side of the processing part, an outlet side transfer device provided on an outlet side of the processing part, the processing part and the processing part. A first nip roller provided between the inlet side transport device and gripping and transporting the work by opening and closing it, a work stopping means for temporarily stopping the work immediately before the processing unit, and a work stopping means for temporarily stopping the work. When stopped, the first nip roller is closed, the work is gripped, and the control device that sends the work to the processing unit side by a first predetermined distance is provided. 2. A second nip roller for gripping and transporting the work by opening and closing the work is provided between the processing unit and the exit side transport device, and the control device closes the second nip roller to remove the work coming out of the processing unit. The work machining / transporting apparatus according to claim 1, wherein the workpiece is gripped and fed out to the exit side transporting apparatus side by a second predetermined distance. 3. The workpiece machining / transportation according to claim 1, wherein the workpiece stopping means is a stopper which is provided between the processing section and the first nip roller and which can be brought into contact with or separated from the workpiece transport path. apparatus.