JP2006186318A - Lead frame extrusion device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lead frame extrusion device where installation space can be made small. <P>SOLUTION: A driving roller 41 is installed in a rotation axis 26 of a device main body 22. The driving roller 41 is rotation-controlled by a driving motor 31. A pressing roller 45 is arranged in a support arm 43 supported by a support wall, and a pusher 21 is sandwiched with the pressing roller 45 and the driving roller 41 from upper and lower sides. The pusher 21 is formed in a gutter shape by a spring stainless steel band. The pusher 21 is bent and a support roller 83 converting an extending direction is arranged on a rear R side of a driving part 47. A pusher rear part suspended from the support roller 83 is guided by a guide rail 122 arranged on a rear wall 121. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lead frame extrusion apparatus that extrudes a strip-shaped lead frame accommodated in, for example, a magazine to a bonding unit.

  Conventionally, a bonding apparatus has been used to bond a chip to a lead frame.

  As shown in FIG. 6, the bonding apparatus includes a bonding unit 801 that performs bonding, and a magazine loader 803 that supplies a strip-shaped lead frame 802 is provided on the side of the bonding unit 801. . The magazine loader 803 is provided with a magazine 804 for receiving and holding the lead frame 802, and the lead frame 802 in the magazine 804 is pushed out to the bonding unit 801 by a lead frame pushing device 805. .

  The lead frame extruding device 805 is provided with a metal plate 811 as a pusher that extends forward when the lead frame 802 is pushed out. The drive method of the metal plate 811 is shown in FIG. Such a motor drive type 812 and a cylinder drive type 813 as shown in FIG. 7B are known.

  However, in the lead frame extruding device 805 of the motor-driven type 812 described above, a drive belt 821 for driving the metal plate 811 is stretched in the stroke direction of the metal plate 811 and the end is driven at the end. A motor 822 for driving the belt 821 is provided. For this reason, the total length of the lead frame extruding device 805 becomes a length dimension obtained by adding the arrangement space of the motor 822 to the stroke amount of the metal plate 811.

  On the other hand, in the lead frame extrusion device 805 of the cylinder drive system 813 described above, a cylinder 831 is provided below the metal plate 811, and the tip of the rod 832 of the cylinder 831 is connected to the metal plate 811, thereby the lead frame extrusion device. Although the total length of 805 can be brought close to the stroke amount of the metal plate 811, it cannot be made shorter than the stroke amount of the metal plate 811.

  As a result, there is a problem that the installation space becomes large.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a lead frame extrusion device capable of reducing the installation space.

  In order to solve the above-mentioned problems, in the lead frame extrusion apparatus according to claim 1 of the present invention, in the lead frame extrusion apparatus for extending the pusher forward and pushing out the lead frame held by the holding means, the pusher is A driving unit configured by a long plate material having a restoring force for restoring to a linear state, and driving the pusher in the length direction by sandwiching the pusher from above and below by a driving roller and a pressing roller that are rotationally driven. On the other hand, the pusher driven by the drive unit is provided on the rear side of the drive unit by providing an extension direction conversion unit that bends the pusher extending linearly and converts the extension direction of the pusher. The moving direction was set to different directions on the front side and the rear side with the extending direction conversion portion as a boundary.

  In other words, the pusher extending forward of the device when the lead frame is pushed out is composed of a long plate material having a restoring force to restore the linear state, and the drive unit is a drive that holds the pusher from above and below. It is comprised by the roller and the pressing roller.

  Further, an extension direction converting portion that bends the pusher is provided on the rear side of the driving portion, and the pusher that extends in the stroke direction on the front side of the extension direction converting portion is the extension portion. On the rear side of the direction conversion unit, the extending direction is converted downward, for example.

  At this time, the moving direction of the pusher driven by the driving unit is set to be different in the front side and the rear side with the extending direction conversion unit as a boundary, and moves in the stroke direction on the front side. The pusher to be moved is moved, for example, in the vertical direction on the rear side of the extending direction changing portion.

  In addition, the extending direction and the moving direction of the pusher on the rear side from the extending direction converting portion are not limited to this, and may be upward or lateral with respect to the stroke direction. good. Alternatively, the rotation direction may be used.

  In the lead frame extruding device of the second aspect, a guide is provided for restricting the movement of the pusher extending in the rear direction from the extending direction changing portion.

  That is, the movement of the pusher extending rearward from the extending direction converting portion is restricted by the guide. This prevents meandering and twisting of the rear part of the pusher, which increases in length when the pusher is retracted.

  Furthermore, in the lead frame extruding device according to claim 3, the cross section of the pusher is formed in an arc shape projecting to the lower surface side to apply the restoring force, while the sliding of the driving roller disposed at the lower portion of the pusher. The contact surface is formed in a circular arc shape with the central portion set back, and the width of the pressing roller disposed at the upper portion of the pusher is set smaller than that of the driving roller, and the extending direction changing portion is formed on the lower surface of the pusher. The support roller was formed in a cylindrical shape that flattened the portion of the pusher that was in contact with the support roller.

  In other words, by forming the pusher's cross-section in an arc shape projecting to the lower surface side, a restoring force that keeps the pusher in a straight line is generated, so that even a member with low springiness maintains a straight state at normal times. Is done.

  Further, the drive unit for driving the pusher is formed in an arc shape in which the center part of the sliding contact surface of the drive roller arranged at the lower part of the pusher is retracted, and the width of the pressing roller arranged at the upper part of the pusher The dimension is set smaller than the drive roller. As a result, the pusher held between the drive roller and the pressing roller is driven while maintaining the curved shape of the pusher.

  Then, by configuring the extending direction changing portion with a cylindrical support roller that is in contact with the lower surface of the pusher, the portion of the pusher that is in contact with the support roller is flatly deformed, and the pusher is Bend.

  In addition, in the lead frame extruding device according to claim 4, the first guide roller that is in sliding contact with the upper surface of the pusher on the front side of the pusher with the support roller as a boundary, and the support roller as a boundary. A bent state maintaining mechanism provided with a second guide roller in sliding contact with the upper surface of the pusher is provided on the rear side of the pusher.

  In other words, the first guide roller of the bent state maintaining mechanism is in sliding contact with the upper surface of the pusher at the front side of the pusher with the support roller as a boundary, thereby suppressing the bulge of the pusher at the corner portion when the pusher is retracted. In addition, on the rear side of the pusher with the support roller as a boundary, the second guide roller of the bent state maintaining mechanism is in sliding contact with the upper surface of the pusher, thereby suppressing the bulge of the pusher at the corner portion when the pusher is delivered.

  In the lead frame extruding device according to claim 5 of the present invention, in the lead frame extruding device that pushes the pusher forward and pushes out the lead frame held by the holding means, the pusher is restored to a linear state. It is composed of a long plate material having a restoring force, and is provided with an extending direction converting portion that bends the pusher extending linearly toward the front of the device and converts the extending direction of the pusher, The moving direction of the pusher was set to be different on the front side and the rear side with the extending direction changing portion as a boundary.

  In other words, the pusher extending forward of the apparatus at the time of extruding the lead frame is composed of a long plate material having a restoring force that restores the linear state. The lead frame extruding device further includes an extending direction converting portion that bends the pusher, and the pusher extending in the stroke direction on the front side of the extending direction converting portion is the extending direction converting portion. On the further rear side, the extending direction is converted downward, for example.

  Thereby, the moving direction of the pusher is set in different directions on the front side and the rear side with the extension direction conversion portion as a boundary, and the pusher moved in the stroke direction on the front side is On the rear side of the direction conversion unit, for example, the vertical movement is performed.

  In addition, the extending direction and the moving direction of the pusher on the rear side from the extending direction converting portion are not limited to this, and may be upward or lateral with respect to the stroke direction. good. Alternatively, the rotation direction may be used.

  According to a sixth aspect of the present invention, there is provided a lead frame extruding device comprising load detecting means for detecting a load received by the pusher when the pusher is moved forward of the device.

  That is, when the lead frame is caught when the pusher is extended forward and the lead frame held by the holding means is pushed out, the pusher is overloaded.

  At this time, the lead frame extruding device includes load detecting means for detecting the load received by the pusher, and the lead frame is caught by detecting an overload state in which the load exceeds a predetermined value. It is detected. For this reason, by stopping the operation of the pusher based on the detection of this overload, the problem that the pusher crushes the lead frame is avoided.

  As described above, in the lead frame extruding device according to the first aspect of the present invention, the drive unit for driving the pusher is constituted by the drive roller and the pressing roller for sandwiching the pusher from above and below, so that the pusher is moved in the stroke direction. Compared with the conventional case where the belt is stretched and the cylinder is driven by a cylinder in which the rod extends in the stroke direction, the space consumed in the stroke direction of the pusher can be reduced, and the stroke amount can also be controlled.

  Further, the pusher is composed of a long plate material having a restoring force to restore the linear state, and the pusher is bent at the extending direction converting portion, so that the pusher is bent forward from the extending direction converting portion. The pusher extending in the stroke direction can be converted to the lower side perpendicular to the stroke direction, for example, on the rear side of the extension direction conversion portion. For this reason, the length dimension of the storage space of the said pusher can be shortened compared with the former comprised with the metal plate with which the said pusher was maintained linearly over the full length.

  By these, the installation space of the said lead frame extrusion apparatus can be made small.

  At this time, the moving direction of the pusher driven by the driving unit is set to be different in the front side and the rear side with the extending direction conversion unit as a boundary, and moves in the stroke direction on the front side. The pusher to be moved can be moved, for example, in the up-down direction orthogonal to the stroke direction on the rear side of the extending direction converting portion.

  For this reason, the stroke amount of the pusher can be increased without increasing the length of the apparatus, as compared with the conventional configuration in which the pusher is formed of a metal plate maintained in a straight line.

  In the lead frame extruding device according to the second aspect, inadvertent movement in the width direction of the rear portion of the pusher extending rearward from the extending direction converting portion can be regulated by the guide. As a result, meandering and twisting of the rear portion of the pusher, which increases in length when the pusher is retracted, can be prevented, and displacement during pusher delivery can be prevented.

  Furthermore, in the lead frame extruding device according to the third aspect, since the cross section of the pusher is formed in an arc shape projecting to the lower surface side, a restoring force for maintaining the pusher in a straight line is generated. Even if it exists, the linear state in normal times can be easily maintained.

  Further, the drive unit for driving the pusher has a sliding contact surface of a drive roller disposed at a lower part of the pusher formed in an arc shape, and a width dimension of a pressing roller disposed at the upper part of the pusher is set to the drive roller. It is set smaller. As a result, the pusher sandwiched between the drive roller and the pressing roller can be driven while maintaining the curved shape of the pusher, and the linear state of the delivered pusher can be maintained.

  Then, by configuring the extending direction changing portion with a cylindrical support roller that is in contact with the lower surface of the pusher, the portion of the pusher that is in contact with the support roller is deformed flat, and the pusher can be easily bent. Can do.

  In addition, in the lead frame extrusion device according to claim 4, on the front side of the pusher with the support roller as a boundary, the first guide roller of the bending state maintaining mechanism is slidably contacted with the upper surface of the pusher, thereby moving the pusher backward. The bulge of the pusher at the corner portion at the time can be prevented. Further, on the rear side of the pusher with the support roller as a boundary, the second guide roller of the bent state maintaining mechanism is slidably contacted with the upper surface of the pusher, thereby preventing the pusher from bulging at the corner portion when the pusher is sent out. .

  Thereby, the stroke amount of the pusher can be controlled more accurately.

  In the lead frame extruding device according to claim 5 of the present invention, the pusher is constituted by a long plate material having a restoring force for restoring to a linear state, and the pusher is formed by the extending direction changing portion. By bending, the pusher extending in the stroke direction on the front side from the extending direction converting portion, the extending direction on the rear side from the extending direction converting portion, for example, is orthogonal to the stroke direction. Can be converted downward.

  For this reason, the length dimension of the storage space of the said pusher can be shortened compared with the former which comprised the said pusher with the metal plate maintained linearly over the full length. Thereby, the installation space of the said lead frame extrusion apparatus can be made small.

  At this time, the movement direction of the pusher is set in different directions on the front side and the rear side with the extending direction conversion portion as a boundary, and the pusher moved in the stroke direction on the front side, On the rear side of the extending direction converting portion, for example, it can move in the vertical direction perpendicular to the stroke direction.

  For this reason, the stroke amount of the pusher can be increased without increasing the length of the apparatus, as compared with the conventional configuration in which the pusher is formed of a metal plate maintained in a straight line.

  Further, in the lead frame extruding device according to claim 6, if the lead frame is caught when the pusher is extended forward and the lead frame held by the holding means is pushed out, the load received by the pusher is increased. By detecting the overload state with the load detecting means for detecting, it is possible to detect that the lead frame is caught.

  For this reason, it is possible to prevent the lead frame from being damaged by the pusher by stopping the operation of the pusher based on the detection of the overload.

  (First embodiment)

  A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a lead frame extrusion apparatus 1 according to the present embodiment, and the lead frame extrusion apparatus 1 is employed in a bonding apparatus for bonding a chip to a lead frame 2.

  This bonding apparatus includes a bonding unit 11 that performs bonding, and a magazine loader 12 that supplies a strip-shaped lead frame 2 is provided on a side portion of the bonding unit 11. The magazine loader 12 is provided with a magazine 13 for accommodating and holding the lead frame 2, and the lead frames 2 in the magazine 13 are pushed out to the bonding unit 11 one by one by the lead frame extrusion device 1. It is configured as follows.

  That is, the lead frame extrusion apparatus 1 is an apparatus that extends the pusher 21 to the front F of the apparatus main body 22 and pushes out the lead frame 2 held in the magazine 13 as holding means to the bonding unit 11. As shown in FIG. 2, the lead frame extrusion apparatus 1 is provided with a pair of upstanding walls 24, 24 facing the upper surface 23 of the apparatus body 22. A rotary shaft 26 is rotatably supported via bearings 25 and 25. One end of the rotating shaft 26 extends through the upright wall 24, and a driven pulley 27 is provided at the extended portion. A belt 28 is hung on the driven pulley 27, and the other end side of the belt 28 is hung on a drive pulley 33 attached to an output shaft 32 of a drive motor 31.

  A driving roller 41 is fixed to the central portion of the rotating shaft 26, and the driving roller 41 is configured to be rotationally controlled by the driving motor 31. Further, as shown in FIG. 3, support walls 42, 42 having an L-shaped cross section are erected at the rear ends of the upright walls 24, 24. The rear end portions of the arms 43 and 43 are rotatably supported. A bridging bar 44 is bridged at the front ends of the support arms 43, 43, and a pressing roller 45 is rotatably supported at the center of the bridging bar 44. The outer peripheral portion of the pressing roller 45 is formed of rubber, and as shown in FIG. 2, the pusher 21 is sandwiched from above and below by the rubber portion 46 of the pressing roller 45 and the driving roller 41. A drive unit 47 is configured to drive the pusher 21 in the length direction.

  A through hole penetrating vertically is provided in the middle of the support arm 43 (not shown), and pressing force adjusting screws 51 and 51 are inserted into the through hole. The pressing force adjusting screws 51, 51 are screwed into screw holes provided in the upright walls 24, 24 (not shown), and by adjusting the screwing amounts of the pressing force adjusting screws 51, 51, The pressing roller 45 is configured such that the pressing force pressing the pusher 21 against the driving roller 41 can be varied.

  The slidable contact surface 61 of the drive roller 41 that is in slidable contact with the lower surface of the pusher 21 is formed in a curved shape with the central portion retracted inward, and the cross-sectional shape of the slidable contact surface 61 is retracted toward the rotation center. It is formed in a circular arc shape. On the other hand, the width dimension of the pressing roller 45 that is in sliding contact with the upper surface of the pusher 21 is set to be smaller than the width dimension of the driving roller 41, and is positioned at the center of the sliding surface 61 of the driving roller 41. Is arranged. The pressing roller 45 is configured such that a rubber portion 46 provided on the outer peripheral portion thereof is elastically deformed according to the shape of the sliding contact surface 61.

  As shown in FIG. 4, the pusher 21 driven in the length direction by the drive unit 47 is made of a stainless steel band for a spring formed in a long plate shape, and is formed in a straight state. The pusher 21 is formed in a rain gutter shape whose central portion in the width direction protrudes on the lower surface side, and is formed in an arc shape whose lateral cross section protrudes downward. The pusher 21 has a restoring force that restores to a straight line even if it is bent due to the springiness of the material, and is further imparted with the restoring force by using the aforementioned curved shape.

  As shown in FIG. 3, an extension direction converting portion 71 that bends the pusher 21 that extends linearly and converts the extension direction of the pusher 21 is provided on the rear R side of the drive portion 47. The moving direction of the pusher 21 that is provided and driven by the driving unit 47 is set to be different on the front F side and the rear R side with the extending direction conversion unit 71 as a boundary.

  That is, a pair of rear standing walls 81, 81 are provided on the upper surface 23 of the apparatus main body 22 so as to face each other, and a rotary shaft 82 is bridged in the middle of both rear standing walls 81, 81. . As shown in FIG. 1, a support roller 83 is rotatably provided on the rotary shaft 82, and the support roller 83 is provided at a position in contact with the lower surface of the pusher 21. The support roller 83 is formed in a columnar shape, and the circumferential surface that is in sliding contact with the lower surface of the pusher 21 has a flat cross-sectional shape. As a result, the portion of the pusher 21 in contact with the support roller 83 can be flatly deformed, and the pusher 21 formed in a cross-sectional arc shape can be flatly deformed and easily bent. It is configured.

  Thus, the front side of the pusher 21 with the support roller 83 as a boundary extends in the horizontal direction that is the stroke direction, while the rear side of the pusher 21 with the support roller 83 as a boundary is downward. It is configured to extend.

  Further, as shown in FIG. 3, a connecting bar 91 is bridged at the upper corners of the rear standing walls 81, 81. As shown in FIG. 1, a front extending arm 92 extending toward the front F of the apparatus main body 22 and a downward extending arm 93 extending downward are fixed to the connecting bar 91. The fixing angles of both arms 92 and 93 can be adjusted, but are fixed at substantially orthogonal positions.

  A pair of first guide rollers 101a and 101b are rotatably provided at the front end portion of the front extension arm 92 via shaft portions 102 and 102, and both the first guide rollers 101a and 101b The pusher 21 is configured to be in sliding contact with the upper surface of the pusher 21 on the front side of the pusher 21 with the support roller 83 as a boundary. In addition, a pair of second guide rollers 103a and 103b are rotatably provided at the distal end portion of the downwardly extending arm 93 via the shaft portions 104 and 104, and both the second guide rollers 103a and 103b are provided. The pusher 21 is configured to be in sliding contact with the upper surface of the pusher 21 on the rear side of the pusher 21 with the support roller 83 as a boundary.

  The first guide roller 101b disposed at the rear R is provided at a position where the pusher 21 is sandwiched by the support roller 83, and the second guide roller 103b disposed above is supported by the support roller 83. It is provided at a position where the pusher 21 is sandwiched. As a result, a bent state maintaining mechanism 111 that maintains the bent state of the pusher 21 bent by the support roller 83 is configured.

  A guide rail 122 extending vertically is fixed to the rear wall 121 of the apparatus main body 22. The guide rail 122 is formed of a rectangular cylindrical body into which the rear portion of the pusher 21 bent and extended downward by the support roller 83 is inserted, and restricts the movement of the inserted pusher 21 in the width direction. The moving direction is guided up and down.

  In the present embodiment according to the above configuration, the pusher 21 extended to the front F of the apparatus main body 22 is composed of a long plate material having a restoring force to restore a linear state, and the drive unit 47 is The driving roller 41 and the pressing roller 45 sandwich the pusher 21 from above and below. For this reason, compared with the conventional case where the pusher 21 is driven by a belt stretched in the stroke direction of the pusher or a cylinder in which the rod extends in the stroke direction, the space consumed in the stroke direction of the pusher 21 can be suppressed. At the same time, the stroke amount of the pusher 21 can be controlled.

  Further, the pusher 21 is formed of a long plate material having a restoring force to restore the linear state, and the pusher 21 is bent by the extending direction converting portion 71, thereby the extending direction converting portion 71. The pusher 21 extending in the horizontal direction which is the stroke direction on the front F side can be converted into the vertical direction on the rear R side from the extending direction converting portion 71. For this reason, the length dimension of the storage space of the said pusher 21 can be shortened compared with the former where the said pusher 21 was comprised with the metal plate maintained linearly over the full length.

  By these, the installation space of the said lead frame extrusion apparatus 1 can be made small.

  At this time, the moving direction of the pusher 21 driven by the driving unit 47 is set to be different in the front F side and the rear R side with the extending direction converting unit 71 as a boundary. The pusher 21 moved in the horizontal direction can be moved in the vertical direction on the rear R side from the extending direction converting portion 71. Here, the extending direction and the moving direction of the pusher 21 on the rear R side from the extending direction converting portion 71 are not limited to this, and may be upward or lateral with respect to the stroke direction. There may be.

  Therefore, it is possible to increase the stroke amount of the pusher 21 without increasing the length of the apparatus main body 22 as compared with the conventional configuration in which the pusher 21 is formed of a metal plate maintained in a straight line. it can.

  Further, inadvertent movement in the width direction of the rear portion of the pusher 21 extending to the rear R side from the extending direction converting portion 71 can be regulated by the guide rail 122. As a result, meandering and twisting of the rear portion of the pusher 21 that increases in length when the pusher 21 is retracted can be prevented, and misalignment when the pusher 21 is delivered can be prevented.

  Furthermore, since the cross section of the pusher 21 is formed in an arc shape projecting to the lower surface side, a restoring force for maintaining the pusher 21 in a straight line is generated. The straight line state can be easily maintained.

  The drive unit 47 that drives the pusher 21 has a slidable contact surface 61 of the drive roller 41 disposed in the lower part of the pusher 21 in an arc shape, and a pressing roller 45 disposed in the upper part of the pusher 21. The width dimension is set smaller than the width dimension of the drive roller 41. For this reason, the pusher 21 sandwiched between the drive roller 41 and the pressing roller 45 can be driven while maintaining the curved shape of the pusher 21, and the linear state of the pusher 21 to be delivered can be maintained.

  Then, the extending direction changing portion 71 is constituted by a cylindrical support roller 83 that is in contact with the lower surface of the pusher 21, so that the portion of the pusher 21 that is in contact with the support roller 83 is deformed flatly, and the pusher 21. Can be easily bent.

  In addition, on the front side of the pusher 21 with the support roller 83 as a boundary, the first guide rollers 101a and 101b of the bent state maintaining mechanism 111 are slidably contacted with the upper surface of the pusher 21, thereby the corner portion when the pusher 21 is retracted. The swell of the pusher 21 can be prevented. Further, on the rear side of the pusher 21 with the support roller 83 as a boundary, the second guide rollers 103a and 103b of the bent state maintaining mechanism 111 are slidably contacted with the upper surface of the pusher 21 so that the pusher 21 is delivered at the corner portion. The swell of the pusher 21 can be prevented.

Thereby, the stroke amount of the pusher 21 by the drive motor 31 can be controlled more accurately.

  (Second Embodiment)

  FIG. 5 is a diagram showing a second embodiment of the present invention, where parts that are the same as or equivalent to those in the first embodiment are given the same reference numerals and description thereof is omitted, and only different parts are described. .

  That is, the lead frame extruding apparatus 201 according to the present embodiment extends the pusher 21 described above to the front F of the apparatus main body 22 and the lead frames 2 held in the magazine 13 as holding means one by one. It is a device that pushes out to the dengue unit 11.

  The apparatus main body 22 of the lead frame extrusion apparatus 201 is provided with a guide 211 that guides the pusher 21 in the horizontal direction, and the guide 211 has a rear R that extends linearly in the guide 211. An extending direction converting portion 71 is provided for bending the pusher 21 downward by 90 degrees and converting the extending direction of the pusher 21. The extending direction changing portion 71 is constituted by the support roller 83 that supports the lower surface of the pusher 21.

  Thereby, the front side of the pusher 21 with the extending direction changing portion 71 as a boundary extends in the horizontal direction which is the stroke direction, while the rear side of the pusher 21 with the supporting roller 83 as a boundary is It is configured to extend downward.

  A first guide roller 101b provided at the front end of the front extension arm 92 (not shown) is disposed on the front F side of the support roller 83, and on the rear R side of the support roller 83. The second guide roller 103b provided at the tip of the downwardly extending arm 93 (not shown) is disposed. Thus, the bent state maintaining mechanism 111 that maintains the bent state of the pusher 21 bent by the support roller 83 is configured.

  The apparatus main body 22 is provided with a guide rail 221 extending vertically, and a slider 222 is slidably supported on the guide rail 221. The apparatus main body 22 is provided with a drive unit 223 for driving the slider 222. The drive unit 223 includes a drive pulley 225 that is rotated by a motor 224 provided at a lower portion thereof, and a drive pulley 225. A driven pulley 226 provided in the upper part and a drive belt 227 stretched between the pulleys 225 and 226 are configured. The slider 222 is fixed to the drive belt 227 via a bracket 228, and the drive belt 227 is rotated by the motor 224 so that the slider 222 can be moved up and down.

  The amount of movement S of the slider 222 by the drive unit 223 includes a separation distance A from the tip of the pusher 21 in the retracted position to the lead frame 2 accommodated in the magazine 13 and a length dimension X of the lead frame 2. And the distance B from the lead frame 2 to the extrusion position to the bonding unit 11 is set to be equal to or greater than the dimension, and based on this, the extension range of the drive belt 227 is Is set.

  The slider 222 is provided with a fixed block 231 fixed to the slider 222 and a movable block 233 supported on a rail 232 extending downward from the fixed block 231 so as to be movable up and down. The block 233 is biased toward the fixed block 231 by a spring 234.

  The pusher 21 is fixed to the movable block 233, and the pusher 21 can be extended and retracted from the apparatus main body 22 by driving the motor 224 and moving the slider 222 up and down. Has been.

  The fixed block 231 is provided with a sensor 241. The sensor 241 is configured to detect that the movable block 233 is separated from the fixed block 231 and output a signal. Thus, when the pusher 21 receives a reaction force greater than the spring force of the spring 234 when the slider 222 is moved upward to extend the pusher 21 toward the front F of the apparatus, the spring 234 extends. The movable block 233 is separated from the fixed block 231 and can be detected by the sensor 241. When the pusher 21 receives an overload of a predetermined level or more in the apparatus main body 22, The load detecting means 235 for detecting this overload is configured.

  The sensor 241 is connected to a control device (not shown) that drives the motor 224, and the control device stops the motor 224 when an overload detection signal is input from the sensor 241. Is configured to do.

  In the present embodiment according to the above configuration, the pusher 21 that extends to the front F of the apparatus when the lead frame 2 is pushed out is composed of a long plate material having a restoring force that restores the linear state. The lead frame extruding device 201 includes an extending direction converting portion 71 that bends the pusher 21, and the extending direction converting portion 71 is bent by the extending direction converting portion 71. The pusher 21 extending in the stroke direction on the front F side from the portion 71 can be converted to the lower side orthogonal to the stroke direction on the rear R side from the extension direction converting portion 71. .

  For this reason, the length dimension of the storage space of the pusher 21 can be shortened as compared with the conventional configuration in which the pusher 21 is configured by a metal plate that is maintained linearly over the entire length. Thereby, the installation space of the said lead frame extrusion apparatus 201 depth can be made small.

  At this time, the movement direction of the pusher 21 is set to a different direction between the front F side and the rear R side with the extending direction converting portion 71 as a boundary, and is moved in the stroke direction on the front F side. The pusher 21 can be moved in the vertical direction perpendicular to the stroke direction on the rear R side from the extending direction converting portion 71.

  For this reason, the stroke amount of the pusher 21 can be increased without increasing the length of the device, as compared with the conventional configuration in which the pusher 21 is formed of a metal plate maintained in a straight line.

  On the other hand, when the lead frame 2 is caught when the pusher 21 is extended to the front F of the apparatus and the lead frame 2 held by the magazine loader 12 is pushed out, the pusher 21 is overloaded.

  At this time, the lead frame extruding device 1 is provided with load detecting means 235 for detecting the load received by the pusher 21, and is caught by the lead frame 2 by detecting an overload state in which the load exceeds a predetermined value. Can be detected. For this reason, by stopping the motor 224 that drives the pusher 21 based on the detection of the overload, it is possible to avoid a problem that the pusher 21 crushes the lead frame 2. Damage to the lead frame 2 can be reliably prevented.

  In both embodiments, the case where the load detection means 235 for detecting the load received by the pusher 21 is provided only in the lead frame extrusion apparatus 201 of the second embodiment has been described as an example. Without being limited thereto, the lead frame extrusion apparatus 1 according to the first embodiment may be provided with load detection means for detecting a load received by the pusher 21 when the pusher 21 is moved to the front F. .

  As an example, there is a method in which a load limiter is configured by providing a torque limiter that detects a load applied to the drive unit 47 in the drive unit 47 that drives the lead frame 2.

It is a side view which shows the 1st Embodiment of this invention. It is a front view of the same embodiment. It is a top view of the embodiment. It is a perspective view which shows the pusher of the embodiment. It is a side view which shows the 2nd Embodiment of this invention. It is a side view which shows the conventional lead frame extrusion apparatus. (A) is a side view which shows the motor drive type drive part of the conventional example, (b) is a side view which shows the cylinder drive type drive part of the conventional example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lead frame extrusion apparatus 2 Lead frame 12 Magazine loader 13 Magazine 21 Pusher 41 Drive roller 45 Pressing roller 47 Drive part 61 Sliding contact surface 71 Extension direction conversion part 83 Support roller 101a 1st guide roller 102a 2nd guide roller 111 Bending state Maintenance mechanism 122 Guide rail 201 Lead frame extrusion device 223 Drive unit 235 Load detection means

Claims (6)

In a lead frame extrusion device that extends the pusher forward of the device and pushes out the lead frame held by the holding means.
The pusher is composed of a long plate having a restoring force to restore the straight state, and the pusher is driven in the longitudinal direction by being sandwiched from above and below by a driving roller and a pressing roller that are driven to rotate. While configuring the drive unit,
An extension direction conversion part that changes the extension direction of the pusher by bending the pusher extending linearly is provided on the rear side of the drive part, and the movement direction of the pusher driven by the drive part is changed. A lead frame extrusion device characterized in that the front side and the rear side are set in different directions with the extending direction changing portion as a boundary.   The lead frame extruding device according to claim 2, further comprising a guide for restricting movement of the pusher extending in the width direction rearward from the extending direction converting portion. While providing the restoring force by forming a cross section of the pusher in an arc shape protruding to the lower surface side,
The sliding contact surface of the driving roller disposed at the lower part of the pusher is formed in an arc shape with a central portion set back, and the width of the pressing roller disposed at the upper part of the pusher is set smaller than the driving roller. ,
The extending direction changing portion is configured by a support roller that is in contact with the lower surface of the pusher, and the support roller is formed in a cylindrical shape that flattens a portion of the pusher that is in contact with the support roller. The lead frame extrusion apparatus according to 1 or 2.   A first guide roller that is in sliding contact with the upper surface of the pusher on the front side of the pusher with the support roller as a boundary, and a first guide roller that is in sliding contact with the upper surface of the pusher on the rear side of the pusher with the support roller as a boundary. 4. The lead frame extruding apparatus according to claim 3, further comprising a bent state maintaining mechanism including two guide rollers. In a lead frame extrusion device that extends the pusher forward of the device and pushes out the lead frame held by the holding means.
The pusher is constituted by a long plate material having a restoring force for restoring the linear state, and the pusher extending linearly toward the front of the device is bent to change the extending direction of the pusher. A lead frame extrusion apparatus characterized in that an extension direction conversion section is provided, and the movement direction of the pusher is set to be different in the front side and the rear side with the extension direction conversion section as a boundary. 6. The lead frame extruding apparatus according to claim 1, further comprising load detecting means for detecting a load received by the pusher when the pusher is moved forward of the apparatus.

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