JP4482528B2 - Electronic component punching apparatus and punching method - Google Patents

Description

  The present invention relates to a punching device and a punching method for punching an electronic component mounted on a carrier tape from a carrier tape fed out from a supply reel.

  For example, in an assembly process of a liquid crystal display device, a process of mounting TAB (Tape Automated Bonding) as an electronic component on a peripheral part of a liquid crystal panel in which two glass substrates are bonded together with an adhesive anisotropic conductive tape There is.

  The TAB is formed by punching a semiconductor chip mounted on a carrier tape with an inner lead bonder together with a part of the carrier tape. In order to punch TAB from the carrier tape, a punching device called a tab / reel unit is usually used. The TAB punched from the carrier tape by the punching device is supplied to the mounting device and mounted on the peripheral portion of the liquid crystal panel.

  The punching device has a supply reel on which a carrier tape on which chips are mounted is wound. The carrier tape wound around the supply reel is fed out by a sprocket that is rotationally driven by a drive source.

  That is, engagement holes are formed at predetermined pitches at both ends in the width direction of the carrier tape, and the teeth of the sprocket are engaged with the engagement holes at both ends in the width direction. Therefore, the carrier tape is fed out from the supply reel by the sprocket being rotated by the drive source.

  The carrier tape fed out from the supply reel is taken up by the take-up reel. Between the supply reel and the take-up reel, a mold device for punching TAB from the carrier tape is disposed. The mold apparatus has a lower mold and an upper mold, and a positioning pin that engages with the engagement hole of the carrier tape protrudes from the lower mold, and the upper mold is driven up and down.

  The carrier tape is positioned with respect to the lower mold by the positioning pins engaging with the engaging holes. If the upper mold is driven in the downward direction with the carrier tape positioned with respect to the lower mold, the TAB is punched from the carrier tape.

  There are various types of TAB, and the width of the carrier tape varies depending on the type. When the width of the carrier tape differs depending on the product type, the sprocket for feeding the carrier tape from the supply reel is also replaced with one having a width that engages with the engagement holes at both ends in the width direction of the carrier tape.

The sprocket is attached to the output shaft of the drive source. The sprocket is positioned in the rotational direction with respect to the output shaft by , for example, a key and a key groove or a spline shaft and a spline groove.

Japanese Patent Application Laid-Open No. 2004-151867 discloses a conventional technique for transporting a carrier tape with a sprocket and punching out TAB from the carrier tape.
JP 2004-47553 A

  However, there are variations in the width dimension of the key groove or spline groove formed in each sprocket corresponding to the width dimension of the carrier tape and the relative positional relationship between each groove and the sprocket teeth.

  Therefore, if the sprocket is replaced with one corresponding to the width of the carrier tape when changing the product type, the positioning accuracy of the carrier tape fed out by the sprocket will also vary.

  Therefore, every time the sprocket is replaced, the operator may have to correct the variation in the positioning accuracy of the carrier tape. May not be sufficiently obtained, and punching defects may occur.

The present invention, when replacing the sprocket in accordance with the type of the Kiyariatepu, electronic components punching apparatus and punching in which to be able to automatically correct the variation in the positioning accuracy of Kiyariatepu caused by the use of the sprocket It is to provide a method.

This invention relates to a punching device for an electronic component punching the electronic component has a width dimension provided on different Kiyariatepu respectively,
A supply reel wound with the carrier tape;
Sprockets having different width dimensions according to the width dimension of the carrier tape having teeth that engage with the engagement holes formed in the carrier tape ;
A drive source for rotationally driving the sprocket when the sprocket is detachably provided and the carrier tape is unwound from the supply reel;
A take-up reel that winds up the carrier tape fed from the supply reel by the sprocket;
A mold having a positioning pin that engages with the engagement hole of the carrier tape, and punching the electronic component from the carrier tape in a state where the positioning tape is engaged with the engagement hole and the carrier tape is positioned. Equipment,
A tooth detection sensor for detecting the teeth of the sprocket as an initial origin position in the rotational direction of the sprocket;
An encoder provided in the drive source for detecting a rotation angle when the sprocket is rotated by the drive source;
When the sprocket is rotated from the initial origin position and the carrier tape is fed to align the positioning pin and the engagement hole of the carrier tape, the rotation angle of the sprocket from the initial origin position is detected by the encoder. Then, the correction origin position is stored for each sprocket having a different width dimension , and the drive of the drive source is controlled with reference to the correction origin position, so that the carrier tape has the width dimension corresponding to the width dimension of the carrier tape. An electronic component punching device comprising a control means for feeding out by a sprocket.

This invention relates to a punching method of an electronic component punching the electronic component has a width dimension provided on different Kiyariatepu respectively,
A step of rotating and driving the sprocket having different width dimensions according to the width dimension of the carrier tape having teeth engaging with the engagement holes formed in the carrier tape;
Winding up the carrier tape fed out by the sprocket;
Punching out the electronic component from the carrier tape positioned by engaging a positioning pin in the engagement hole of the carrier tape;
Detecting the sprocket teeth as an initial origin position in the rotational direction of the sprocket;
When the sprocket is rotated from the initial origin position and the carrier tape is fed to align the positioning pin and the engagement hole of the carrier tape, the rotation angle of the sprocket from the initial origin position is detected and the width is detected. Stores the corrected origin position for each sprocket having different dimensions, controls the rotation of the sprocket based on the corrected origin position, and feeds the carrier tape by the sprocket having a width dimension corresponding to the width dimension of the carrier tape. An electronic component punching method comprising the steps of:

  According to the present invention, the variation in the positioning accuracy of the carrier tape that occurs when using a sprocket having a different width depending on the type of the carrier tape is stored in advance. Accordingly, the positioning of the carrier tape can be automatically corrected.

  Therefore, even if the sprocket is replaced in accordance with the change in the carrier tape type, it is not necessary for the operator to correct the variation in the positioning accuracy of the carrier tape each time.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a punching apparatus according to the present invention, which has a supply reel 2 around which a carrier tape 1 is wound. As shown in FIG. 3, device holes 3 are formed in the carrier tape 1 at a predetermined interval (only one is shown).

  Inner leads 4 are formed in the device hole 3, and rectangular engagement holes 1 a are formed at predetermined intervals in the longitudinal direction at both ends in the width direction of the carrier tape 1. A semiconductor chip 5 is mounted on the inner lead 4. Then, as shown by a chain line in FIG. 3, the inner lead 4 is punched together with the semiconductor chip 5 to form a TAB 6 as an electronic component. The semiconductor chip 5 mounted in the device hole 3 is coated with a resin (not shown).

  The carrier tape 1 is wound around the supply reel 2 together with the spacer tape 7 shown in FIG. The carrier tape 1 is fed out from the supply reel 2 by a feeding sprocket 11 as described later. The spacer tape 7 fed from the supply reel 2 together with the carrier tape 1 is taken up by the spacer tape take-up reel 12.

  The carrier tape 1 fed out from the supply reel 2 by the sprocket 11 is rotationally driven by a drive source (not shown) via a guide roller 14 and a dancer roller 15 in a state in which a shift in the width direction is prevented by a guide sprocket 13. It is wound on a take-up reel 16.

  The dancer roller 15 is guided so as to be displaceable in the vertical direction indicated by the arrow Z, and when the take-up reel 16 takes up the carrier tape 1 fed out from the feeding sprocket 11, the amount of looseness of the carrier tape 1 is reduced. Rise according to. When the amount of looseness of the carrier tape 1 decreases to a predetermined amount, the winding of the carrier tape 1 by the take-up reel 16 is stopped by a signal from a sensor (not shown) that detects this.

  As shown in FIG. 2, the feeding sprocket 11 is rotationally driven by a drive source 21. In the drive source 21, a motor and a speed reducer are integrated, and a boss portion 10 of the feeding sprocket 11 is detachably fitted to an output shaft 22 thereof.

  The feeding sprocket 11 fitted to the output shaft 22 is positioned in the rotational direction by a coupling means such as a key and a key groove or a spline groove and a spline shaft. That is, the position of the tooth 11 a of the feeding sprocket 11 is positioned with respect to the rotation direction of the output shaft 22.

The feeding sprocket 11 has a pair of disk portions 18, and the teeth 11 a are provided on the outer peripheral surfaces of the pair of disk portions 18 at the same intervals as the engagement holes 1 a formed in the carrier tape 1. That is, the teeth 11 a formed on the outer peripheral surfaces of the pair of disk portions 18 are set to have the same interval in the width direction and the longitudinal direction of the engagement holes 1 a formed in the carrier tape 1.

  The position of the tooth 11a of the feeding sprocket 11 is detected by a tooth detection sensor 23 such as a light reflection type provided on the drive source 21 via a bracket 23a. The detection signal of the tooth detection sensor 23 is output to the control device 24 as shown in FIG. The control device 24 includes a storage calculation unit 25, a setting operation unit 26, and an output unit 27. Although not shown in detail in the setting operation unit 26, a plurality of setting buttons for setting the type of TAB 6 is provided.

The drive source 21 is provided with an encoder 29 that detects the rotation angle of the output shaft 22. An output from the encoder 29 is input to the control device 24. When the tooth detection sensor 23 detects the teeth 11 a of the feeding sprocket 11, the output from the encoder 29 is stored in the storage calculation unit 25 of the control device 24 as the initial origin position of the rotation angle of the feeding sprocket 11. It has become so.

  A die device 31 for punching the TAB 6 from the carrier tape 1 is disposed between the feeding sprocket 11 and the guide sprocket 13. The mold apparatus 31 has a lower mold 32 that is a female mold and an upper mold 33 that is a male mold.

  A pair of positioning pins 34 (shown in FIG. 3) are provided on the upper surface of the lower mold 32 at intervals corresponding to the pair of engaging holes 1a in the width direction of the carrier tape 1. The upper mold 33 is driven in the vertical direction by a cylinder or the like (not shown).

  When the positioning pin 34 is engaged with the engagement hole 1 a of the carrier tape 1, the carrier tape 1 is positioned with a predetermined accuracy with respect to the lower mold 32. That is, when the upper mold 33 is driven in the downward direction, the carrier tape 1 is pressed and held on the upper surface of the lower mold 32 by a tape press (not shown). If there is no displacement between the carrier tape 1 and the lower mold 32, the pair of engagement holes 1 a of the carrier tape 1 engage with the pair of positioning pins 34.

  When the upper die 33 is further lowered from this state, the portion where the semiconductor chip 5 is mounted from the carrier tape 1 is punched together with the inner lead 4. That is, TAB 6 is punched from the carrier tape 1.

  A TAB detection unit 36 for detecting whether or not the semiconductor chip 5 is mounted in the device hole 3 of the carrier tape 1 is provided upstream of the mold device 31 in the feeding direction of the carrier tape 1.

  If the TAB detection unit 36 detects the semiconductor chip 5 mounted in the device hole 3, when the semiconductor chip 5 is transported to the mold apparatus 31, the mold apparatus 31 is activated and the carrier tape 1 is moved to the TAB 6 Punch out.

  When the semiconductor chip 5 is not mounted in the device hole 3 and the TAB detection unit 36 does not detect the semiconductor chip 5, the mold device 31 is used even if the portion of the carrier tape 1 is conveyed to the mold device 31. Does not work.

Next, a procedure for punching the TAB 6 from the carrier tape 1 by the punching device having the above-described configuration will be described.
First, it is assumed that the punching apparatus of the present invention punches the TAB 6 of the varieties A to C by appropriately exchanging the varieties. The width of the carrier tape 1 varies depending on the type. First, when the type A TAB 6 is punched from the carrier tape 1 having the width dimension W1, the feeding sprocket 11 having a width dimension corresponding to the type of carrier tape 1 is attached to the output shaft 22 of the drive source 21. This is referred to as a first payout sprocket 11.

  If the first feed sprocket 11 is attached to the output shaft 22, the type A set button provided in the setting operation unit 26 is pressed, the drive source 21 is manually rotated, and the tooth detection sensor 23 causes the first detection sprocket 11 to The teeth of the feeding sprocket 11 are detected. The output from the encoder 29 at that time is stored in the storage calculation unit 25 of the control device 24 as the initial origin position of the rotation of the first paying sprocket 11.

  Next, when the first payout sprocket 11 is at the initial origin position, the positioning pin 34 of the lower die 32 and the carrier are shown in FIG. Deviation occurs in the engagement hole 1 a of the tape 1.

  In that case, the positioning pin 34 of the lower mold 32 and the engagement hole 1a of the carrier tape 1 are aligned. That is, the operator manually operates the drive source 21 to rotate the first payout sprocket 11, and sends the carrier tape 1 in the direction indicated by the arrow X in FIG. The engagement hole 1 a is aligned with the positioning pin 34. The rotation position of the first feed sprocket 11, which is a signal from the encoder 29 output when the engagement hole 1 a and the positioning pin 34 are aligned, is stored in the storage calculation unit 25 of the control device 24 as the corrected origin position. Is done.

  That is, the key groove formed in the first extension sprocket 11 that is generated when the rotation angle difference between the initial origin position and the corrected origin position is attached to the output shaft 22 of the drive source 21. Or it is memorize | stored in the memory | storage calculating part 25 as the dispersion | variation in the rotation angle by the width dimension of a spline groove | channel, and the relative positional relationship of each groove | channel and the tooth | gear 11a of the 1st delivery 11 sprocket.

  That is, when the first feed sprocket 11 is attached to the output shaft 22 when punching out the TAB 6 of the type A, the amount of deviation of the rotation angle between the initial origin position of the first feed sprocket 11 and the corrected origin position that occurs at that time. Is taught.

  In this way, after the initial origin position and the corrected origin position of the first feeding sprocket 11 are stored in the storage calculation section 25, when the operation button of the product type A of the setting operation section 26 of the control device 24 is operated, the output A drive signal is output from the unit 27, and the drive source 21 is activated by the drive signal.

  The output unit 27 operates the drive source 21 by correcting the difference in rotational angle between the initial origin position of the first feeding sprocket 11 stored in the storage calculation unit 25 and the corrected origin position. Thereby, the first feeding sprocket 11 is rotated and the carrier tape 1 is fed out.

  The correction origin position is a position where the engagement hole 1 a of the carrier tape 1 engages with the positioning pin 34 of the lower mold 32. Accordingly, the carrier tape 1 fed out from the supply reel 2 by the first feeding sprocket 11 is positioned so that the engaging hole 1a engages with the positioning pin 34 based on the corrected correction origin position. Therefore, the mold device 31 can accurately punch the TAB 6 from the carrier tape 1 without causing a positional shift.

  Next, when the type B TAB 6 is punched from the carrier tape 1 having the width dimension W2, the feeding sprocket 11 having a width corresponding to the type of carrier tape 1 is attached to the output shaft 22 of the drive source 21. The payout sprocket corresponding to the TAB 6 of the type B is set as the second payout sprocket 11.

  In the case of punching out the TAB 6 of the product type B, as in the case of the TAB 6 of the product type A, after pressing the setting button for the product type B of the setting operation unit 26, the second feeding sprocket 11 is manually rotated to move the tooth 11a to the tooth It is detected by the detection sensor 23. The output from the encoder 29 at that time is stored in the storage calculation unit 25 of the control device 24 as the initial origin position of the rotation of the second extension sprocket 11.

  Next, the drive source 21 is manually operated to rotate the second feeding sprocket 11, and the engagement hole 1 a of the carrier tape 1 is aligned with the positioning pin 34 of the lower mold 32. At this time, the rotation position of the second extension sprocket 11, which is a signal output from the second encoder 29, is taught as the correction origin position and stored in the storage calculation unit 25. That is, the shift amount of the rotation angle between the initial origin position of the second extension sprocket 11 and the corrected origin position is stored in the storage calculation unit 25 of the control device 24.

  Therefore, after teaching the initial origin position and the corrected origin position of the second sprocket 11, if the setting button for the product type B of the setting operation unit 26 is operated, the second feeding sprocket 11 is output from the output unit 27. Is driven to rotate with reference to the corrected origin position. As a result, the carrier tape 1 is positioned at a position where the engagement hole 1a engages with the positioning pin 34, so that the TAB 6 can be punched from the carrier tape 1 without causing a displacement.

  Similarly, when the TAB 6 of the product type C is punched from the carrier tape 1, the initial origin position and the corrected origin position, which are deviation amounts of the specific rotation angle caused by the third feeding sprocket 11 used for the TAB 6 of the product type C Is taught and stored in the storage calculation unit 25 of the control device 24.

  In this way, if the initial origin position and the corrected origin position for each of the products A to C are taught and stored in the storage calculation unit 25, for example, when changing the TAB 6 from the product B to the product A, the carrier tape 1 is used. When the second sprocket 11 is replaced with the first paying sprocket 11, the type A operation button provided in the setting operation unit 26 of the control device 24 is operated.

  As a result, the control device 24 drives the drive source 21 based on the corrected origin position of the product type A that has been taught in advance and stored in the storage calculation unit 25, and controls the rotation of the first feeding sprocket 11. Accordingly, the carrier tape 1 fed out by the first feeding sprocket 11 is positioned so that the engagement hole 1a is engaged with the positioning pin 34 provided in the lower mold 32 of the mold device 31, and therefore, the carrier tape 1 is removed from the carrier tape 1. The TAB6 of the kind A can be punched precisely.

  That is, the initial origin position and the corrected origin position for each feed sprocket 11 used according to the type of TAB 6 are taught in advance and stored in the storage calculation unit 25 of the control device 24, so that the storage is performed. Based on this, the carrier tape 1 can be positioned.

  Therefore, it is not necessary to manually align the delivery hole 11a of the carrier tape 1 with the positioning pin 34 every time the product type is changed, thereby improving workability. It is possible to prevent the occurrence of punching defects due to work mistakes.

  If the feed sprocket 11 having a different width dimension is replaced in accordance with the change of the TAB type, the guide sprocket 13 is also replaced with one having the same width dimension as the feed sprocket 11.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram of the punching apparatus which shows one embodiment of this invention. The plane of the drive source that rotationally drives the feeding sprocket. The top view for demonstrating the state which the positioning pin provided in the lower mold | type and the engagement hole of the carrier tape shifted | deviated. The block diagram which shows a control system.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Carrier tape, 2 ... Supply reel, 6 ... TAB, 16 ... Take-up reel, 21 ... Drive source, 23 ... Teeth detection sensor, 24 ... Control apparatus, 25 ... Storage operation part, 26 ... Setting operation part, 27 ... Output unit 29... Encoder 31. Mold device 32. Lower mold 33. Upper mold 34.

Claims (2)

A width are provided in different Kiyariatepu electronic components a punching apparatus of the electronic component punching respectively,
A supply reel wound with the carrier tape;
Sprockets having different width dimensions according to the width dimension of the carrier tape having teeth that engage with the engagement holes formed in the carrier tape ;
A drive source for rotationally driving the sprocket when the sprocket is detachably provided and the carrier tape is unwound from the supply reel;
A take-up reel that winds up the carrier tape fed from the supply reel by the sprocket;
A mold having a positioning pin that engages with the engagement hole of the carrier tape, and punching the electronic component from the carrier tape in a state where the positioning tape is engaged with the engagement hole and the carrier tape is positioned. Equipment,
A tooth detection sensor for detecting the teeth of the sprocket as an initial origin position in the rotational direction of the sprocket;
An encoder provided in the drive source for detecting a rotation angle when the sprocket is rotated by the drive source;
When the sprocket is rotated from the initial origin position and the carrier tape is fed to align the positioning pin and the engagement hole of the carrier tape, the rotation angle of the sprocket from the initial origin position is detected by the encoder. Then, the correction origin position is stored for each sprocket having a different width dimension , and the drive of the drive source is controlled with reference to the correction origin position, so that the carrier tape has the width dimension corresponding to the width dimension of the carrier tape. An electronic component punching device comprising: a control means for feeding out by a sprocket. A method of punching electronic components each of punching electronic components provided on a plurality of carrier tapes having different width dimensions ,
A step of rotating and driving the sprocket having different width dimensions according to the width dimension of the carrier tape having teeth engaging with the engagement holes formed in the carrier tape;
Winding up the carrier tape fed out by the sprocket;
Punching out the electronic component from the carrier tape positioned by engaging a positioning pin in the engagement hole of the carrier tape;
Detecting the sprocket teeth as an initial origin position in the rotational direction of the sprocket;
When the sprocket is rotated from the initial origin position and the carrier tape is fed to align the positioning pin and the engagement hole of the carrier tape, the rotation angle of the sprocket from the initial origin position is detected and the width is detected. Stores the corrected origin position for each sprocket having different dimensions, controls the rotation of the sprocket based on the corrected origin position, and feeds the carrier tape by the sprocket having a width dimension corresponding to the width dimension of the carrier tape. A process for punching electronic parts, characterized by comprising the steps of:

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