JPH085952Y2 - Magazine guide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a bonding apparatus, and in particular, the width and length of a magazine in which a frame such as a lead frame is stored are automatically set even when the type of the frame is changed. A possible magazine guide device.

BACKGROUND ART [I] Conventionally, in this type of device, a lead frame for wire bonding, in which a plurality of IC chips (semiconductors) are arranged in the longitudinal direction, is intermittently fed one pitch at a time by a transfer means for transferring in the longitudinal direction. To be done. The sent lead frame is transferred onto the bonding stage heated by the heat block, and then the IC chips arranged on the lead frame are connected to the surrounding leads by wires.

As a frame guide device for preventing meandering of the lead frame transferred by the above-mentioned transfer means, there is an actual open guide 61-156.
There is a means disclosed in Japanese Patent No. 233.

This device is equipped with a first guide rail 20 as shown in FIG.
Further, width direction moving means 23 capable of moving in the width direction is provided on the second and second guide rails 21, respectively, and a width detection sensor for detecting the width of the lead frame 22 on the first and second guide rails 20 and 21 (see FIG. (Not shown). The width direction moving means 23 is a U-shaped frame base 24 fixed to the base of the bonding apparatus, and a control motor 25 including a pulse motor fixed to the base of the frame base 24,
It is composed of a threaded rod 26 connected to the output shaft of the control motor 25.

In the above device, a command is issued from the computer to the control motor 25, and based on this command, the amount of rotation of the control motor 25 is converted into the amount of advance / retreat of a slider (not shown) screwed with the screw rod 26, and this slider is The first and second guide rails 20 and 21 are slid to the maximum position along the guide surface in the direction of increasing the width, and stopped. Next, since the center of the IC chip (island 22a) formed on the lead frame 22 needs to be aligned with the bonding origin on the XY table (not shown), it is provided on the heater plate 28 and its center is set. After the center of the IC chip (island 22a) is aligned with the plurality of protrusions (not shown) shown, the lead frame retainer 29 is pressed from above and the openings 29a are aligned and positioned. As a result, the center of the island 22a of the lead frame 22 is aligned with the center position of the bonding stage 27.Therefore, after the changed lead frame 22 is set, the control motor is rotated in the opposite direction by a computer command, First and second guide rails 20,2
1 moves in a direction in which the width becomes narrower to secure an optimum amount of space between the regulation surfaces of the first and second guide rails 20 and 21 and the end surface of the lead frame 22.

[II] A magazine guide device corresponding to the frame guide device is composed of a loader 41 and an unloader 41 'shown in FIG. The applicant has applied for this magazine guide device as Japanese Patent Application No. 1-108382.

In FIG. 4, the side surface of the magazine 31 is regulated by a stocker guide 62 formed in a substantially L shape, and the stocker guide 62 includes first guide plates 66a, 66b and a second guide plate 66a.
The guide plates 67a and 67b of are fixed movably. Since the first and second guide plates 66a, 66b and 67a, 67b are fixed to the restricting surface of the stocker guide 62, they can be expanded by moving the stocker guide 62 in the direction of arrow E, and Install the second guide plates 67a and 67b into the first
And the second guide rails 20 and 21 are moved along the regulation surface of the stocker guide 62 in the direction perpendicular to the arrows D and D '.
It can be moved in any direction. With such an adjustment, the magazine 31 having a different size can be replaced.

The loader 41 and the unloader 41 'are composed of a lifting mechanism base 42, adjusting means 43 for moving and adjusting the lifting mechanism base 42 in the direction of arrow C in FIG. 4, and a lifting mechanism 44. Since the loader 41 and the unloader 41 'have the same configuration, the loader 41 will be described.

The adjusting means 43 for moving and adjusting the elevating mechanism base 42 in the direction of the arrow C is, as shown in FIG.
A nut 46 fixed to the end portion of which is formed with a female screw, and a screw rod 47 formed with this nut 46 and a male screw are screwed together. This screw rod 47 is a bearing fixed to the device body 49.
Both ends are rotatably supported by 48, and a knob is attached to the end.
50 is installed. By rotating the knob 50, the lifting mechanism base 42 can be moved in the direction of arrow C in FIG. Instead of the knob 50, a control motor including a pulse motor may be used to automatically digitally control the moving amount of the lifting mechanism base 42 to adjust the center of the lead frame 22 and the center of the magazine 31.

Next, the configuration of the elevating mechanism 44 that holds the magazine 31 fixedly and performs intermittent elevating movement will be described.

The magazine receiver 60 shown in FIG. 5 (a) has its lower end pivotally supported by the bearing 42a of the lifting mechanism base 42, and its upper end coupled to the control motor 55 (indirectly driven by a gear, pulley, etc.). It is also supported) by an elevating member 56 that is screwed with an elevating shaft 53 formed with a male screw. The elevating member 56 can be moved up and down by the forward and reverse rotation of the control motor 55. A chuck 61 that holds and holds the end of the magazine 31 is attached to the free end of the magazine receiving portion 60 supported by the elevating member 56.
Is attached slidably, and the other end of the chuck 61 is configured to come into contact with the cam surface of a cam 54 arranged along the elevating shaft 53. As shown in FIG. 5 (b), the cam 54 has convex portions formed on the upper and lower positions of the elevating shaft 53, and the magazine receiving portion 60 is raised to raise the magazine.
When receiving and holding 31 or when descending and ejecting the magazine 31, the convex portion formed on the cam surface of the cam 54 pushes forward and projects.

In this magazine receiving portion 60, a chuck 61 is fixed to the tip of a fixing member 60a as shown in FIG.
A lower end of the holding table 60e is connected to a lower end of the holding table 60e by a spring 60b, and the fixing member 60a is always biased toward the holding table 60e. A starting member 60c is provided below the holding table 60e, and the fixing member 60a
A sliding member 60d fixed to the sliding member is guided by the starting member 60c and can slide. A roller 60f is provided at the other end of the fixing member 60a, and the roller 60f moves along the cam surface of the cam 54.

When a product type is exchanged by the conventional magazine guide device as described above, the attachment position of the chuck 61 is adjusted according to the size of the magazine 31, so that the magazines having different widths can be accommodated.

The operation of the device having the above-described structure will be described. The magazine 31 mounted on the holding table 60e shown in FIG.
When located on the convex portion of the cam surface of 4, i.e., at the time of supplying the magazine, the roller 60f pushes the chuck 61 forward against the biasing force of the spring 60b by the convex portion of the cam 54. There is a gap between them. The chuck 61 holds the magazine 31 by the action of the spring 60b when the elevating member 56 descends and is positioned in the concave portion of the cam surface of the cam 54, that is, when the magazine is fixed. When it is further lowered, the chuck 61 projects forward by the convex portion of the cam surface of the cam 54 again to release the state in which the magazine 31 is held and to be ready for ejection. In the above device, the chuck 61 holds and holds the magazine 31 when moving up and down, but when the magazine 31 is being supplied to the guide device from above, the magazine 31 is fixed to the regulation surface so as not to drop downward. Magazine pushers 65 whose shaft ends project by a cylinder or the like (not shown) are provided on the second guide plates 67a and 67b.

[Problems to be Solved by the Invention] However, in the above-described conventional apparatus, various kinds of adjustments must be performed when a frame type is exchanged because magazines of different sizes are used according to the type. As shown in Fig. 7, the stocker guide 62 is moved to expand the frame in the longitudinal direction (arrow E direction), and the second guide plate is adjusted in the frame thickness direction (arrows D and D'directions). 67a and 67b are manually adjusted respectively. In addition, since the attachment position of the chuck 61 that holds the magazine fixedly has to be changed, there is a drawback that the number of manual adjustment points is large and the work efficiency is reduced. Therefore, there is a drawback in that automation and improvement of work efficiency cannot be achieved by such manual adjustment. Further, in the conventional apparatus, the center of the bonding stage 27 and the center of the loader 41 and the unloader 41 'are aligned with each other.
Since the adjustment of 1 and the adjustment of the second guide plates 67a and 67b are performed separately, there is a drawback that it takes time to adjust the left and right fixing. Also, this fixing does not always mean that the left and right guide plates, etc. are fixed exactly at the same position.
Even when the elevating mechanism base 42 is accurately adjusted with respect to the bonding stage 27, the center of the magazine 31 is not accurately aligned, and there is a risk that errors between devices may occur.

The present invention has been made in view of the above-mentioned drawbacks of the prior art.
An object of the present invention is to provide a magazine guide device capable of automatically setting the width and length of a magazine in which a frame such as a lead frame is stored even when the type of frame is exchanged.

[Means for Solving the Problem] The present invention comprises a magazine capable of accommodating a plurality of frames, a magazine which is regulated, and is movable in a direction for supplying or accommodating the frames accommodated in the magazine. First guide means, and second guide means movable in a direction intersecting the moving direction of the first guide means,
Holding means for holding the magazine when the magazine is moved up and down, the first guide means detects the width (or length) of the magazine, and the second guide means detects the length (or width) of the magazine. A means is provided.

[Embodiment] Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view showing details of the configuration of a loader (or unloader) of a magazine guide device according to the present invention, and FIG. 2 is a diagram showing details of the configuration seen from the side surface of FIG. The same reference numerals are used for those having the same configuration and function as those of the conventional device, and the detailed description thereof will be omitted. Only different parts will be described below.

In FIG. 1, the frame 3 is a lifting mechanism 44 (FIG. 4).
It is fixed to. Lifting shaft 5 that constitutes this lifting mechanism 44
3, the elevating member 56 and the like have the structure shown in FIGS. 5 (a) and 5 (b). The frame 3 is formed in a substantially L shape as shown in FIG. 1, and is regulated by the guide surface of the frame 3 and is slidable in the thickness direction of the magazine 31 (Y-Y 'direction). Two are provided. The magazine guide plate 2 is provided with a nut 4 formed with a female screw, and the nut 4 is screwed and coupled to a feed screw 5 formed with a male screw. The shaft end of the feed screw 5 is connected to the shaft of a pulse motor 6 fixed to the frame 3.
The nut 4 screw-engaged with the feed screw 5 by the rotational force of the pulse motor 6 is configured to be movable back and forth in the YY 'direction. Although not shown, the magazine guide plate 2 has a length (direction C-C 'in FIG. 2) that can guide at least one magazine 31, and a lifting mechanism for the magazine guide plate 2 is also provided. A cam 10 having the same cam surface as the cam 54 shown in FIGS. 5A and 5B is provided at the end on the 44 side. The cam 10 may be either integral with or separate from the magazine guide plate 2, and is configured to be able to move in the same direction by the same amount as the magazine guide plate 2 moves in the YY 'direction. . Therefore, the distance between the cam surface of the cam 10 and the chuck 61 is always kept constant. The distance can be adjusted as appropriate. The roller 60f of the chuck 61 shown in FIGS. 5 (a) and 5 (b) is in contact with the cam surface of the cam 10, and the chuck 61 moves back and forth as the cam 10 moves back and forth. Has become. The operation of the chuck 61 is the same as that shown in FIG. Also, a magazine is provided inside the magazine guide plate 2.
The contact plate 8 that regulates a part of the thickness direction and the length direction of 31
Are fixedly arranged on a support member (not shown). This plate 8
The regulation surface of is a reference surface for fixing the side surface position of the magazine 31.

On the other hand, the width detecting mechanism 1 for detecting the width of the magazine 31 is provided on the side of the magazine guide plate 2 facing the cam 10.

The width detection mechanism 1 has a structure as shown in FIG. 2, and includes a fulcrum 1f, a stopper block 1c and a sensor shown in FIG.
1a is fixed to the frame 3. The arm 1e is swingably supported about a fulcrum 1f, a disc 1g is rotatably provided at one end of the arm 1e, and a sensor detection plate is provided at the other end.
1h and spring 1b are provided. The other end of the spring 1b is fixed to the side surface of the stopper block 1c, and the arm 1e is constantly urged toward the stopper block 1c by the urging force of the spring 1b. The arm 1e is stopped by a stopper 1d formed of a screw or the like provided on the stopper block 1c so that the arm 1e does not rotate more than a predetermined distance by the urging force of the spring 1b. By adjusting the stopper 1d, the disc 1g is set so as not to interfere with the magazine 31 and the disc 1g when the magazine 31 is inserted from above. Further, the spring 1b is configured to have a biasing force that allows the magazine 31 to be pressed smoothly against the contact plate 8 without rattling.

In the apparatus having the above construction, when the magazine guide plate 2 shown in FIG. 1 is moved in the direction of the arrow Y'by the action of the feed screw 5, the disc 1g shown in FIG. 2 is indicated by the chain double-dashed line.
Collides on the side of 31. After the collision, when the magazine guide plate 2 further moves in the Y'direction, the arm 1e swings through the fulcrum 1f, whereby the sensor 1a and the sensor detection plate 1h are separated from each other and a control circuit (not shown) is provided. The logic changes (for example, higi → low or low → high), and this detection output causes the control circuit to output a signal for stopping the rotation of the pulse motor 6 to stop the movement of the magazine guide plate 2 and thereby the width of the magazine 31. Is configured to detect.

Next, a configuration for detecting the length of the magazine 31 by the magazine guide plate 2'will be described.

As shown in FIG. 1, a magazine guide plate 2'is slidably provided on the frame 3. A nut 4'is fixed to the side surface of the magazine guide plate 2'on the side of the frame 3,
The nut 4'is screwed to the feed screw 5 '.
A pulse motor 6'is attached to the shaft end of the feed screw 5 '. The magazine guide plate 2'is movable in the XX 'direction by the forward and reverse rotations of the pulse motor 6'. Further, the magazine guide plate 2'is provided with a width detection mechanism 1 for detecting the length direction of the magazine 31 and a magazine pusher 9. The width detecting mechanism 1 has the same structure as that shown in FIG. Also, magazine pusher 9
The projection portion 9a is projected forward by means such as a cylinder (not shown), and the magazine pusher 9 allows the magazine 31 to be securely locked to the regulation surface of the contact plate 8.

The operation of the magazine guide device having the above configuration will be described.

First, when the magazine 31 is inserted in the direction of arrow C shown in FIG. 2, the bottom surface of the magazine 31 is placed on the holding table 60e of the magazine receiving portion 60 of the elevating mechanism 44. In this state, the control circuit issues a command to the pulse motors 6, 6'to move the magazine guide plates 2, 2'in the X'and Y'directions to move the magazine 31.
When the disc is pressed against the regulation surface of the contact plate 8 and regulated, the disc 1g abutting on the side surface of the magazine 31 swings the arm 1e against the biasing force of the spring 1b. Then, the sensor detection plate of arm 1e
1h and the sensor 1a are separated from each other to change the logic and detect that the width and length of the magazine are at a predetermined distance. The control circuit stops driving the pulse motors 6 and 6'in response to this detection command. In this state, the magazine 31 is automatically aligned with the center of the bonding stage.
The elevating mechanism 44 intermittently moves the 31 and the frames in the magazine 31 are sequentially sent out onto the bonding stage by a pusher or the like not shown. When the magazine 31 is lowered by the elevating mechanism 44 and all the frames in the magazine 31 have been sent out (or stored), the magazine pusher 9 holds the next magazine 31 in a fixed manner. As a result, the previous magazine 31 is held by the magazine receiving portion 60 and is shown in FIG. 5 (b).
The movement as shown in can be performed. This magazine 31
After the magazine has been discharged, the magazine receiving portion 60 rises to a predetermined position, the magazine 31 held by the magazine pusher 9 is placed, and the protruding portion 9a of the magazine pusher 9 is returned to the original position so that the next magazine 31 Sequentially send out (or store) the frames inside.

The bonding work is automatically performed by repeating the above steps.

[Advantages of the Invention] As described above, according to the present invention, even when the product type is exchanged, there is no need for the operator to make adjustments, so that the work efficiency can be improved. Further, since the present invention can automatically detect the width and length of a magazine, there is an effect that even magazines of the same product type but different external dimensions can be easily dealt with.

[Brief description of drawings]

1 is an embodiment of the present invention. FIG. 1 is a plan view showing the structure of a magazine guide device of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a structure of a conventional frame guide device. FIG. 4, FIG. 4 is a diagram showing a configuration of a loader and an unloader of a conventional magazine guide device, FIG. 5 (a) is a diagram showing a configuration of the lifting mechanism of FIG. 4, and FIG. 5 is a diagram showing details of the configuration of the magazine receiving portion and the chuck of FIG. 1-width detection mechanism, 1a-sensor, 1b-spring, 1c-
Stopper block, 1d …… Stopper, 1e …… Arm, 1f
…… Support point, 1g …… Disc, 1h …… Sensor detection plate, 2,2 ′…
… Magazine guide plate, 3 …… Frame, 4,4 ′ …… Nut, 5,5 ′ …… Feed screw, 6,6 ′ …… Pulse motor, 8…
… Plate, 9 …… Magazine pusher, 10 …… Cam, 31…
… Magazine, 44… Lifting mechanism.

Claims (1)

[Scope of utility model registration request] 1. A magazine capable of accommodating a plurality of frames, and first guide means configured to regulate the magazine and to be movable in a direction for supplying or accommodating the frames accommodated in the magazine. Second guide means movable in a direction intersecting the moving direction of the first guide means;
Holding means for holding the magazine when the magazine is moved up and down, the first guide means detects the width (or length) of the magazine, and the second guide means detects the length (or width) of the magazine. A magazine guide device characterized in that means are provided.