JP2008030875A - Tape conveying device and working device for tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tape conveying device having high accuracy of the tape conveying length, and a working device for a tape. <P>SOLUTION: A tape conveying device 1 for intermittently conveying a tape (a tape-like substrate 3) having perforations 34 in its longitudinal direction by a conveying means (a front side conveying mechanism 33A and a rear side conveying mechanism 33B) while repeating the conveyance and the stop in the longitudinal direction comprises sprockets 42, 43 which are engaged with the perforations 34 and driven following the conveyance of the tape (the tape-like substrate 3), a rotational quantity detection means (a rotary encoder 44) for detecting the rotational quantity of the sprockets 42, 43, and a control means 25 for controlling the drive of the conveying means (the front side conveying mechanism 33A and the rear side conveying mechanism 33B) based on the rotational quantity of the sprockets 42, 43 by the rotational quantity detection means (the rotary encoder 44). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tape transport device and a tape working device.

  An electronic component mounting apparatus for mounting an electronic component such as an IC chip on a tape such as a TAB (Tape Automated Bonding) tape or a COF (Chip On Film or Chip On Flexible Circuit Board) tape, or an electronic component mounted on the tape In order to more securely fix the tape to the tape, a resin coating device for applying an adhesive resin between the electronic component and the tape is generally used as a tape working device for performing various operations on the tape. Are known. The tape working device includes a tape transport device that transports the tape in the longitudinal direction of the tape, and a resin coating device that mounts an electronic component on the tape or applies a resin between the tape and the electronic component. And a work execution device such as the above.

  The tape transport device intermittently transports the tape repeatedly in a longitudinal direction for a predetermined constant length and stopped for a predetermined time. The work execution apparatus performs a predetermined work on the tape while the conveyance of the tape is stopped. Some of the TAB tapes and COF tapes have so-called perforations in which a plurality of perforations are formed at regular intervals on both sides of the tape along the longitudinal direction.

  For a tape on which such perforations are formed, the tape transport device detects the perforation by an optical detection means including a light emitting part and a light receiving part and is transported as disclosed in Patent Document 1. The length of the tape to be conveyed is obtained by counting the number of tape perforations. In other words, the light emitting part and the light receiving part are arranged so as to be opposed to each other above and below the path through which the tape perforation passes, and when light from the light emitting part passes through the perforation and enters the light receiving part, a portion between adjacent perforations When the light from the light emitting unit is blocked by the light and is not incident on the light receiving unit, an on / off signal is output. Then, the number of perforations is counted by the on / off signal to determine the length of the tape to be conveyed.

JP 2004-71773 A (see FIG. 2 etc.)

  However, in the case of using the optical detection means as described above, since only an on / off signal equal to the number of perforations passing between the light projecting unit and the light receiving unit is output, the tape transport length is equal to the perforation interval. Can only be controlled in units of length. Therefore, there is a problem that the accuracy of the tape transport length cannot be increased.

  Therefore, an object of the present invention is to provide a tape transport device and a tape working device that can increase the accuracy of the tape transport length.

  In order to solve the above-described problems, in a tape transport device that transports a tape having perforations formed in the longitudinal direction intermittently while transporting and stopping in the longitudinal direction by the transport means, the tape engages with the perforations and is taped. A sprocket that is driven to rotate in accordance with the conveyance, a rotation amount detection means for detecting the rotation amount of the sprocket, and a control means for controlling the drive of the conveyance means based on the rotation amount of the sprocket by the rotation amount detection means. .

  By configuring the tape transport device in this way, the transport means is driven based on the amount of rotation of the sprocket that rotates in accordance with the transport of the tape, so that the accuracy of the transport length of the tape can be increased.

  In another invention, in addition to the above-mentioned invention, the control means reduces the tape transport speed to a low speed at which the tape can be stopped with a predetermined position accuracy before stopping the tape transport, And after conveying the length stabilized at this low speed, the drive of a conveyance means shall be stopped. By configuring the tape transport device as described above, the accuracy of the transport length of the tape can be increased.

  According to another invention, in addition to the above-described invention, the sprocket is disposed between a transport means provided in front of a work area where a predetermined work is performed on the tape and the work area. By adopting such a configuration of the tape transport device, the influence on the detection accuracy due to the slack of the tape is reduced, the detection accuracy of the transport length of the tape is increased, and the accuracy of the transport length can be increased.

  According to another invention, in addition to the above-described invention, the sprocket is two sprockets that respectively engage with perforations formed on both sides of the tape. By adopting such a configuration of the tape transport device, the tape transport length detection accuracy can be increased, and the transport length accuracy can be increased.

  In another invention, in addition to the above-described invention, the two sprockets rotate together. By adopting such a configuration of the tape transport device, the tape transport length detection accuracy can be increased, and the transport length accuracy can be increased.

  In another invention, in addition to the above-mentioned invention, the sprocket pin is deviated from the center line of the sprocket by a quarter of the difference in perforation center distance between two types of tapes having different perforation widths. And By adopting such a configuration of the tape transport device, it is possible to deal with two types of tapes having different perforation widths only by reversing the left and right sides of the sprocket.

  In order to solve the above-described problems, a tape working device includes the above-described tape transport device and a work execution device that performs a predetermined work on a tape having perforations formed in the longitudinal direction.

  By adopting such a configuration of the tape working device, the tape transport accuracy of the tape working device can be increased.

  ADVANTAGE OF THE INVENTION According to this invention, the tape conveyance apparatus and tape working apparatus with high precision of the conveyance length of a tape can be provided.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing a schematic configuration in which a tape transport device 1 according to an embodiment of the present invention is used in a resin coating system 2. The resin coating system 2 is a system for sealing and fixing the electronic component 4 and the tape substrate 3 mounted on the tape substrate 3 as a tape shown in FIG. 2 with a thermosetting resin.

  FIG. 2 is a diagram showing a schematic configuration of the tape-like substrate 3 to be handled by the resin coating system 2, and is a partially enlarged view of a portion indicated by a dotted line A in FIG. FIG. 2A is a plan view when the side on which the electronic component 4 of the tape-like substrate 3 is mounted is the upper side (upward). FIG. 2B is a cross-sectional view taken along a cutting line AA shown in FIG.

  A plurality of electronic components 4 are mounted on the tape-shaped substrate 3 at regular intervals in advance. That is, the electronic component 4 mounted on the tape-like substrate 3 is omitted from the illustration provided on the electronic component 4 side with respect to the electrode portion not shown which is formed on the tape-like substrate 3 side. The terminal part is electrically connected.

  As shown in FIG. 1, the resin coating system 2 seals the electronic component 4 mounted on the tape-shaped substrate 3, and the electronic component 4 mounted on the tape-shaped substrate 3 is attached to the tape-shaped substrate 3. In order to attach in a more secure state, the resin coating device 5 as a tape working device for applying a thermosetting resin, the resin curing device 6 for overheating and curing the applied resin, and the tape for the resin coating device 5 A substrate supply device 7 for supplying the substrate 3 and a substrate winding device 8 for winding the tape substrate 3 carried out from the resin curing device 6 are provided. In the resin coating system 2, the tape-like substrate 3 is transported in the order from the substrate supply device 7 through the resin coating device 5 and the resin curing device 6 to the substrate winding device 8.

  The resin coating device 5 includes a tape transport device 1 and a resin coating head operating device 9 as a work execution device. FIG. 3 shows a schematic configuration of the resin coating head operating device 9, and FIGS. 4 to 9 show a configuration of the tape transport device 1.

  The substrate supply device 7 includes a substrate supply reel 10 on which a tape-like substrate 3 supplied to the resin coating device 5 is wound. On the substrate supply reel 10, a spacer tape 11 </ b> A is wound on the tape-shaped substrate 3 to be wound. The spacer tape 11A protects the tape itself and the electronic component 4 from being damaged by rubbing the tape-like substrates 3 wound around the substrate supply reel 10 with each other.

  The substrate take-up device 8 includes a substrate take-up reel 12 that is taken up in a state where the tape-like substrate 3 unloaded from the resin curing device 6 and the spacer tape 11B overlap each other. The spacer tape 11B is also for protecting the tape-like substrate 3 and the electronic component 4 wound around the substrate take-up reel 12, similarly to the spacer tape 11A.

  The tape-shaped substrate 3 wound around the substrate supply reel 10 and the tape-shaped substrate 3 wound around the substrate take-up reel 12 are connected. That is, the resin coating system 2 is a so-called reel-to-reel resin coating system.

  In addition to the substrate supply reel 10, the substrate supply device 7 includes a spacer tape take-up reel 13 on which the spacer tape 11 </ b> A separated from the tape-like substrate 3 is taken up. Further, a guide roller 14 and a guide plate 16 for guiding the tape-like substrate 3 drawn out from the substrate supply reel 10 to the resin coating device 5 side, and a spacer tape 11A separated from the tape-like substrate 3 is taken up by the spacer tape. A guide roller 15 for guiding the reel 13 is provided.

  The tape transport device 1 provided in the resin coating device 5 includes transport rollers 17 and 18 that transport the tape-like substrate 3 supplied from the substrate supply device 7 from the substrate supply device 7 toward the resin curing device 6. Then, the resin coating head operating device 9 performs an operation of applying a thermosetting resin to the tape-like substrate 3 supplied from the substrate supply device 7.

  The tape transport device 1 transports the tape-shaped substrate 3 by a predetermined distance that is a distance corresponding to the mounting interval of each electronic component 4 mounted on the tape-shaped substrate 3 or a distance corresponding to an integral multiple of the mounting interval. The operation of stopping for a certain period of time is repeated. That is, the tape transport device 1 transports the tape-shaped substrate 3 intermittently so as to transport the tape-shaped substrate 3 for a predetermined distance and stop for a predetermined time. In the present embodiment, one transport length is set to a distance corresponding to four times the mounting interval, and the stop time is set to 2 seconds. That is, four electronic components 4 are conveyed by one conveyance and then the operation of stopping for 2 seconds is repeated to convey the tape-like substrate 3 intermittently. The conveyance length and the stop time are not limited to the above, and are appropriately determined depending on the configuration of the resin coating system 2 and the like.

  The resin coating head actuating device 9 has a resin coating region 19 to which a thermosetting resin indicated by a dotted line in FIGS. 2A and 2B is applied during 2 seconds when the conveyance of the tape-like substrate 3 is stopped. Then, an operation of applying a thermosetting resin is performed. When the thermosetting resin applied to the resin application region 19 is cured, the electronic component 4 mounted on the tape-like substrate 3 is sealed, and the tape-like substrate 3 and the electronic component are fixed. It will be certain.

  FIG. 3 shows a schematic configuration of the resin coating head operating device 9.

  As shown in FIG. 3, the resin coating head actuating device 9 includes four resin coating heads 20 in the same number as the number of electronic components 4 transported by one transport, and once for four electronic components 4. In addition, the thermosetting resin can be applied. That is, the thermosetting resin is applied to the four electronic components 4 during 2 seconds when the conveyance of the tape-like substrate 3 is stopped.

  The width P (see FIG. 2B) of the resin application region 19 is around 100 μm, and is formed around the electronic component 4 along the boundary portion 21 between the electronic component 4 and the tape-like substrate 3. The resin coating head 20 moves along the boundary portion 21 while being accurately positioned by the head moving mechanism 22 at the boundary portion 21 between the electronic component 4 and the tape-like substrate 3, and applies the thermosetting resin. . The head moving mechanism 22 includes an X-axis drive mechanism, a Y-axis drive mechanism, and a Z-axis drive mechanism that are not shown in the figure and can be operated independently of each other. With these drive mechanisms, the resin coating head 20 is provided. , And moved along the boundary portion 21.

  On the tape-shaped substrate 3, target marks 23 are drawn corresponding to the respective electronic components 4 and whose positional relationship with the boundary portion 21 is specified in advance. The head moving mechanism 22 is provided with a camera device 24 that uses an imaging element such as a CCD for imaging the target mark 23 as an imaging unit. The camera device 24 is provided for each resin coating head 20 and is configured to move integrally with the movement of the resin coating head 20. In addition, a predetermined position (hereinafter referred to as a target mark alignment position) in which a position on the imaging surface is specified in advance is set on the imaging surface of the camera device 24.

  Then, the resin coating head actuating device 9 moves the resin coating head 20 so that the target mark 23 is imaged at the target mark alignment position by a control unit 25 (see FIG. 1) constituted by a CPU or the like. Thereby, the resin coating head 20 can be arranged at a specific position with respect to the target mark 23. The control unit 25 performs overall control of the resin coating system 2 including the resin curing device 6 and the like in addition to control of conveyance of the tape-like substrate 3 described later.

  That is, in the resin coating head actuator 9, the positional relationship such as the arrangement distance between the camera device 24 and the resin coating head 20 is specified in advance, and the target mark 23 is connected to the target mark alignment position on the imaging surface of the imaging unit. By moving the resin coating head 20 so as to image, the resin coating head 20 can be arranged at a specific position with respect to the target mark 23. In addition, by specifying the positional relationship between the target mark 23 and the boundary portion 21 in advance, the control unit 25 moves the resin coating head 20 along the boundary portion 21 with the target mark 23 as a reference. Can do. In this way, the thermosetting resin is applied while moving the resin application head 20 along the boundary portion 21 with the target mark 23 as a reference.

  When the application of the thermosetting resin is completed, that is, when a predetermined time (2 seconds in this case) elapses until the application of the thermosetting resin is completed, the tape-like substrate 3 is again conveyed by a predetermined distance. Thereafter, the resin coating head actuating device 9 newly applies a thermosetting resin to the tape-like substrate 3 and the electronic component 4 conveyed into the resin coating device 5 for a predetermined fixed time.

  Thus, in the resin coating device 5, the tape-shaped substrate 3 is transported from the substrate supply device 7 side to the resin curing device 6 side while repeating the transport of the tape-shaped substrate 3 and the application of the thermosetting resin.

  The resin curing device 6 that transports the tape-like substrate 3 coated with the thermosetting resin between the electronic component 4 is provided with a heating device (not shown). The heat applied by the heating device (not shown) cures the resin applied to the tape-like substrate 3 while passing through the resin curing device 6, and seals and tapes the electronic component 4 mounted on the tape-like substrate 3. Fixing to the substrate 3 is ensured. In the resin curing device 6, the heating time can be sufficiently ensured while suppressing the enlargement of the resin curing device 6 by allowing the tape-like substrate 3 to meander up and down. .

  The tape-like substrate 3 that has passed through the resin curing device 6 is wound around the substrate take-up reel 12 in a state where it overlaps the spacer tape 11B in the substrate take-up device 8. In addition to the substrate take-up reel 12, the substrate take-up device 8 is provided with a spacer tape take-up reel 26 around which a spacer tape 11B that is stacked on the tape-like substrate 3 is wound. Further, a drawing roller 27 that draws the tape-like substrate 3 unloaded from the resin curing device 6 into the substrate winding device 8, and a guide roller 28 and a guide that guide the drawn tape-like substrate 3 to the substrate take-up reel 12. A plate 29 is provided. Further, a guide roller 30 is provided for guiding the spacer tape 11B drawn from the spacer tape winding reel 26 to the substrate take-up reel 12.

  The transport rollers 17 and 18 and the drawing roller 27 are rotated in synchronization with each other by the control unit 25 to transport the tape-shaped substrate 3. That is, the conveyance rollers 17 and 18 and the drawing roller 272 rotate so as to convey the tape-like substrate 3 by a distance four times the mounting interval of the electronic component 4 in one conveyance, and the resin coating head operates. The apparatus 9 repeats the rotation and stop cycle of stopping while applying the thermosetting resin between the tape-like substrate 3 and each electronic component 4. The substrate take-up reel 12 detects the amount of tape slack with a sensor (not shown) in order to prevent the tape 3 from being tightened, and turns the winding on and off according to the amount of slack.

  By the way, as described above, when the control unit 25 performs control to move the resin coating head 20 along the boundary portion 21, the target mark 23 is imaged at the target mark alignment position on the imaging surface of the camera device 24. In addition, it is necessary to move the resin coating device 5. At this time, the shorter the distance between the target mark alignment position on the imaging surface of the camera device 24 and the image formation position of the target mark 23, the longer the resin coating head 20 moves to a specific position with respect to the target mark 23. The amount is reduced, and the application work time can be shortened. That is, the time during which the conveyance of the tape-like substrate 3 is stopped can be shortened. Therefore, by increasing the accuracy of the transport length of the tape transport device 1, the target mark alignment position on the imaging surface of the camera device 24 and the image formation position of the target mark 23 after the transport of the tape-like substrate 3 is finished. The gap distance can be shortened. Furthermore, if the target mark 23 is removed from the shooting area of the camera device 24, it takes a very long time to search for the target mark 32.

  Further, by increasing the photographing magnification of the camera device 24, the recognition accuracy of the target mark 23 imaged on the imaging surface of the camera device 24 by the control unit 25 is increased, and the accuracy of movement control of the resin coating head 20 is increased. be able to. On the other hand, when the shooting magnification of the camera device 24 is increased, the shooting angle of view of the camera device 24 is narrowed. Therefore, it is necessary to increase the accuracy of the transport length of the tape-like substrate 3 so that the target mark 23 falls within a narrow shooting angle of view.

  Therefore, the tape transport apparatus 1 according to the present embodiment has a high transport length accuracy by the configuration described below. The configuration of the tape transport device 1 will be described with reference to FIGS.

  In the following description, the side on which the electronic component 4 is mounted on the tape-like substrate 3 conveyed by the tape conveying device 1 is the upper side (upper), the opposite side is the lower side (lower), and the tape-like substrate 3 is conveyed. The direction to be performed, that is, the direction from the substrate supply device 7 toward the substrate winding device 8 is defined as the front (front side), and the opposite direction is defined as the rear (rear side). Further, from the rear to the front, the right hand side, that is, the front side of the paper surface is the right side (right side), and the opposite side, that is, the back side of the paper surface is the left side (left side).

  FIG. 4 is a plan view of the tape transport device 1 as viewed from above, and FIG. 5 is a side view of the tape transport device 1 as viewed from the right side. 6 is a cross-sectional view taken along a cutting line AA shown in FIG. 4, and FIG. 7 is a cross-sectional view taken along a cutting line BB shown in FIG. 8 and 9 are partial enlarged views of the transport length detection mechanism 31 for detecting the transport length. In particular, FIG. 8 shows a transport length at which the transport length detection mechanism 31 can detect the transport length of the tape-like substrate 3. FIG. 9 shows a retracted state in which the transport length detection mechanism 31 is retracted from the tape-like substrate 3.

  FIG. 8A is a side view of the transport length detection mechanism 31 in a transport length detectable state as viewed from the right side, and FIG. 8B is a transport length detection mechanism 31 shown in FIG. It is the top view which looked at from the front. FIG. 9A is a side view of the transport length detection mechanism 31 in the retracted state as viewed from the right side, and FIG. 9B shows the transport length detection mechanism 31 shown in FIG. 9A from the front side. FIG.

  As shown in FIGS. 4 and 5, the tape transport device 1 is provided with guide rails 32 that support the tape-like substrate 3 supplied from the substrate supply device 7 from below, and at two locations in the front-rear direction. A front-side transport mechanism 33A and a rear-side transport mechanism 33B are provided as transport means. The tape transport device 1 transports the tape-shaped substrate 3 supplied from the substrate supply device 7 from the rear to the front by the front transport mechanism 33A and the rear transport mechanism 33B, and the tape-shaped substrate 3 to the resin curing device 6. Supply.

  The guide rail 32 has a length extending from the substrate supply device 7 to the resin curing device 6 and is provided in one row on the left and right, that is, as a pair on the left and right. The left and right guide rails 32 are disposed on the left and right sides of the tape-like substrate 3 and below the perforations 34 formed along the longitudinal direction, that is, the longitudinal direction of the tape-like substrate 3. That is, the left and right guide rails 32 are arranged along the left and right perforations 34 below the tape-shaped substrate 3 and support the tape-shaped substrate 3 from the lower side at the position where the perforations 34 are formed. . That is, the tape-like substrate 3 is supported from the substrate supply device 7 to the resin curing device 6 by the guide rail 32 under the portion where the left and right perforations 34 are formed.

  The front transport mechanism 33A includes a motor 35 and a drive roller 36 that is rotated by the motor 35. The drive roller 36 is provided as a pair of left and right, one on each side. The left and right drive rollers 36 contact the tape-like substrate 3 on the guide rail 32 at a portion including a region where the perforations 34 formed on both the left and right sides of the tape-like substrate 3 are formed. is doing.

  The guide rail 32 is temporarily interrupted at a portion facing the drive roller 36, and a pair of left and right driven rollers 37 are provided at the interrupted portion, one on each side corresponding to each left and right drive roller 36. Yes. The driving roller 36 and the driven roller 37 constitute the conveying roller 17 shown in FIG.

  The rear transport mechanism 33B also includes a motor 38 and a drive roller 39 that is rotated by the motor 38. This drive roller 39 is also provided as a pair of left and right, one on each side. The left and right drive rollers 39 contact the tape-like substrate 3 on the guide rail 32 at a portion including a region where the perforations 34 formed on the left and right sides of the tape-like substrate 3 are formed. ing. The guide rail 32 is also temporarily interrupted at the portion facing the drive roller 39, and a pair of left and right driven rollers 40 are provided in the interrupted portion, one on the left and one on the left and the right corresponding to each of the left and right drive rollers 39. Yes. Similarly, in the rear transport mechanism 33B, the drive roller 39 and the driven roller 40 constitute the transport roller 18 shown in FIG.

  The tape-like substrate 3 is passed between the driving roller 36 and the driven roller 37 of the front side transport mechanism 33A and in contact therewith. Further, also in the driving roller 39 and the driven roller 40 of the rear transport mechanism 33B, the tape-like substrate 3 is sandwiched between and in contact with the driving roller 39 and the driven roller 40. Therefore, by rotating the drive roller 36 of the front transport mechanism 33A and the drive roller 39 of the rear transport mechanism 33B, the tape-like substrate 3 is transported from the rear to the front.

  The rear transport mechanism 33B is provided with a torque keeper 41 between the motor 38 and the drive roller 39 so that tension is always generated in the tape-like substrate 3 transported by the front transport mechanism 33A. This tension can be maintained even when is stopped. More than the feed length (transport length) of the tape-like substrate 3 transported by the front transport mechanism 33A due to a rotation error between the motor 35 and the motor 38 or a difference in circumferential length due to a difference in wear amount between the drive roller 36 and the drive roller 39. In some cases, the feed length (transport length) of the tape-like substrate 3 transported by the rear transport mechanism 33B becomes long. Thus, if the feed length of the rear transport mechanism 33B is longer than the feed length of the front transport mechanism 33A, the tape-like substrate 3 between the front transport mechanism 33A and the rear transport mechanism 33B may be slack. is there. In some cases, the tape-like substrate 3 itself has a slack due to the curvature. However, the torque keeper 41 can prevent the tape-like substrate 3 from being slackened by applying a backward pulling force to the tape-like substrate 3.

  On the other hand, if the tape-like substrate 3 has become slack, the slack portion that has floated from the guide rail 32 approaches the resin coating head 20 side by the amount that has floated. The movement of the resin coating head 20 with respect to the tape-like substrate 3 is controlled based on the distance between the tape-like substrate 3 and the resin coating head 20 that is not slack. Therefore, when the tape-like substrate 3 is slack, the distance between the planned tape-like substrate 3 and the resin coating head 20 is different from the actual distance, so that the resin can not be applied accurately. There is a fear.

  Therefore, as shown in the present embodiment, the torque keeper 41 prevents the tape-like substrate 3 from slacking between the front transport mechanism 33A and the rear transport mechanism 33B, whereby the resin coating head 20 and the tape The distance to the substrate 3 can be kept at the planned distance, and the resin can be accurately applied.

  By the way, by transporting the tape-shaped substrate 3 by the transport rollers 17 and 18, even a very thin tape-shaped substrate 3 can be transported without being damaged. For example, a configuration in which a sprocket is engaged with the perforation 34 and the tape-like substrate 3 is conveyed by rotationally driving the sprocket is also conceivable. However, in such a configuration, when the tape-like substrate 3 becomes thin, the perforation 34 that engages with the sprocket may be broken by the rotational drive of the sprocket. In particular, when a pulling force directed backward is applied to the tape-like substrate 3 by the torque keeper 41 as in the present embodiment, the sprocket and the perforation 34 are engaged with a large force. Therefore, a large load is applied to the perforation 34 and the perforation 34 is likely to break.

  On the other hand, as in the present embodiment, the transport roller 17 (drive roller 36 and driven roller 37) and the transport roller 18 (drive roller 39 and driven roller 40) are brought into surface contact with the tape-like substrate 3 and transported. By doing so, the tape-like substrate 3 can be transported without damaging the tape-like substrate 3.

  For example, when the tape-like substrate 3 having a thickness of 50 μm or less is to be transported by the rotational drive of the sprocket, there is a high risk that the perforation 34 is broken by the rotational drive of the sprocket. On the other hand, when transported by the transport rollers 17 and 18, it can be transported stably to the thin tape-like substrate 3 having a thickness of 30 μm or 25 μm without causing breakage or the like.

  The transport length detection mechanism 31 includes two sprockets 42 and 43 disposed on the width direction of the tape-like substrate 3, that is, on the left and right of the tape-like substrate 3, and a rotary encoder 44 that is a rotation amount detection unit. Both the sprocket 42 and the sprocket 43 are integrally attached to the rotary shaft 45 of the rotary encoder 44. That is, the sprocket 42, the sprocket 43, and the rotating shaft 45 rotate integrally.

  The transport roller 17 (drive roller 36 and driven roller 37) and the transport roller 18 (drive roller 39 and driven roller 40) shown in the present embodiment are each 15 mm in diameter and contact the tape-like substrate 3. The width of the surface is 10 mm. Further, the sprockets 42 and 43 have a diameter of 30 mm. However, by increasing the diameters of the transport roller 17 (the driving roller 36 and the driven roller 37) and the transport roller 18 (the driving roller 39 and the driven roller 40) and reducing the contact surface with the tape-like substrate 3, the tape-like shape is obtained. The conveyance of the substrate 3 can be stabilized. For example, the diameters of the conveying roller 17 (the driving roller 36 and the driven roller 37) and the conveying roller 18 (the driving roller 39 and the driven roller 40) are 45 mm, respectively, and the width of the surface in contact with the tape substrate 3 is 3 mm. As a result, meandering during the transport of the tape-shaped substrate 3 is effectively suppressed, the transport speed is stabilized, and the transport of the tape-shaped substrate 3 is stabilized.

  The sprocket 42 and the sprocket 43 are respectively disposed at positions above the left and right perforations 34 formed on the tape-like substrate 3, and are respectively provided on the left and right perforations 34 of the tape-like substrate 3 conveyed on the left and right guide rails 32. Each is engaged. Therefore, when the tape-shaped substrate 3 is conveyed from the rear to the front, the sprockets 42 and 43 are rotated according to the conveyance. On the other hand, since the perforation 34 is also used in a pre-process of the resin coating process (for example, a circuit wiring forming process or a semiconductor chip bonding process), there is a probability that the perforation 34 having a deformed shape is generated when the strength of the tape-like substrate 3 is reduced. Get higher. When the shape of the perforation 34 is deformed, a rotation angle signal corresponding to the transport length is not output from the encoder, and thus a transport error of the tape-like substrate 3 occurs. However, as described above, when the sprockets 42 and 43 are engaged with the two perforations 34 formed at the left and right end portions of the tape-shaped substrate 3, respectively, the deformation of one of the perforations 34 is, for example, Even if it occurs at a probability of 1/1000, the probability that both of the two perforations are deformed in shape is approximately 1 ppm, causing almost no problem. In addition, when perforation 34 does not deform | transform, it cannot be overemphasized that such an effect does not arise.

  As shown in FIG. 6 and FIG. 7, a recessed portion 32 </ b> A that is recessed downward is formed in a portion of the guide rail 32 that faces the sprockets 42, 43 below the sprockets 42, 43. The vertical positions of the sprockets 42, 43 are such that the pins 46, 47 of the rotating sprockets 42, 43 pass below the support surface 32B that supports the tape-like substrate 3 that is the upper surface of the guide rail 32. Is set to That is, the recesses 32A are formed as relief portions for the pins 46 and 47 so that the pins 46 and 47 do not interfere with the support surface 32B.

  The pins 46 and 47 enter the inside of the perforation 34 in the recess 32 </ b> A, and the rear edge 34 </ b> A of the tape-like substrate 3 conveyed forward is the rear surface of the peripheral surface of the pins 46 and 47. To be engaged. The rear edge 34A of the perforation 34 is engaged with the rear surface 46A of the peripheral surface of the pin 46 and the rear surface of the peripheral surface of the pin 47, so that the sprockets 42 and 43 are tape-shaped. It rotates according to the conveyance of the substrate 3.

  Since the sprockets 42 and 43 are not connected to driving means such as a motor, the sprockets 42 and 43 themselves are not rotationally driven by themselves. That is, since the sprockets 42 and 43 rotate in accordance with the conveyance of the tape-like substrate 3, so-called driven rotation, a large load is not applied between the pins 46 and 47 and the perforation 34. Therefore, the pins 46 and 47 do not break the perforation 34. Therefore, even if the thickness of the tape-like substrate 3 is 50 μm or less, for example, a very thin tape-like substrate 3 of 25 μm, for example, the sprockets 42 and 43 faithfully follow the transport of the tape-like substrate 3. , 43 rotate. That is, the sprockets 42 and 43 are accurately rotated by a rotation amount corresponding to the transported length of the tape-like substrate 3.

  Since the sprockets 42 and 43 and the rotating shaft 45 are integrated, the amount of rotation of the sprockets 42 and 43 is detected by the rotary encoder 44. Information on the rotation amount detected by the rotary encoder 44 is sent to the control unit 25, which calculates the transport length of the tape-like substrate 3 based on the rotation amounts of the sprockets 42 and 43.

  The control unit 25 conveys the tape-like substrate 3 by a predetermined constant length based on this conveyance length (conveyance length of the tape-like substrate 3). And after this conveyance, it stops for a predetermined fixed time. The control unit 25 controls the front-side transport mechanism 33A and the rear-side transport mechanism 33B so as to perform intermittent transport that performs this transport and stop.

  In the present embodiment, as described above, a cycle of conveying a length corresponding to four times the mounting interval of electronic components and stopping for 2 seconds is repeated, and during this 2 second stop time, the resin coating apparatus 5, the operation of applying the thermosetting resin to the four electronic components 4 is performed.

  The lengths of the pins 46 and 47 of the sprockets 42 and 43, the arrangement interval of the pins 46 and 47 in the circumferential direction, the arrangement interval of the perforations 34, etc. are independent of the rotational position of the sprockets 42 and 43, and at least one pin 46 and 47 are set to always engage with the perforation 34, respectively. That is, regardless of the rotational position of the sprockets 42 and 43, as described above, the rear surface of the peripheral surface of the pins 46 and 47 of the sprockets 42 and 43 always engages with the rear edge of the perforation 34. It seems to be. Therefore, the sprockets 42 and 43 are rotated following the conveyance of the tape-like substrate 3, and the conveyance of the tape-like substrate 3 can be accurately converted into the rotation of the sprockets 42 and 43. Therefore, the transport length of the tape-like substrate 3 can be detected with high accuracy.

  Thus, by accurately detecting the transport length of the tape-like substrate 3, the control of the transport length of the front transport mechanism 33A and the rear transport mechanism 33B by the control unit 25 can be performed with high accuracy. Therefore, when the tape-shaped substrate 3 is transported, the distance that the target mark alignment position on the imaging surface of the camera device 24 and the image forming position of the target mark 23 are shifted can be shortened. Further, even if the shooting magnification of the camera device 24 is increased, the target mark 23 can be placed within a narrow shooting angle of view. That is, when performing the resin coating operation, the resin coating head operating device 9 shortens the distance by which the resin coating device 5 is moved so that the target mark 23 forms an image at the target mark alignment position on the imaging surface of the camera device 24. Since it is possible to reduce the time until the coating operation is started, the time during which the tape-like substrate 3 is stopped can be shortened.

  The transport length detection mechanism 31 is disposed between the resin coating apparatus 5 disposed in the work area where the work of coating the thermosetting resin on the tape-like substrate 3 is performed and the front transport mechanism 33A. As described above, the tape-like substrate 3 is pulled backward by the torque keeper 41 so as not to be loosened. When the slack is eliminated by pulling the tape-like substrate 3 backward by the torque keeper 41, the feed length on the rear side of the tape-like substrate 3 is slightly smaller than the feed length on the front side by the amount of the looseness. There is. Therefore, the detection accuracy of the conveyance length can be stably increased by detecting the conveyance length of the tape-like substrate 3 at a position close to the front conveyance mechanism 33A.

  Instead of using the torque keeper 41, it is also possible to eliminate the slack that has occurred during transport by setting the rear transport mechanism 33B slightly reverse after transport is stopped. In the case of such a configuration, the tape-like substrate 3 is pulled rearward by reversing the rear-side transport mechanism 33B. The amount of displacement increases toward the rear side. Therefore, it is possible to detect the transport length with higher accuracy by detecting the transport length as close to the front transport mechanism 33A as possible on the rear side than detecting the transport length of the tape-like substrate 3 on the rear side.

  The tape-like substrate 3 is engaged by sprockets 42 and 43 at two places on the left and right sides in the width direction. Therefore, it is possible to suppress the occurrence of slack in the width direction on the tape-like substrate 3. The tape-like substrate 3 is supported on the lower side by the guide rail 32 at the position where the perforation 34 is formed, but supports the tape-like substrate 3 between the left and right guide rails 32. There is nothing. Therefore, between the left and right guide rails 32 and the guide rails 32, a force that bends downward by its own weight acts on the tape-like substrate 3. When the tape-like substrate 3 bends downward, the tape-like substrate 3 is meandered and conveyed, and the detection accuracy of the conveyance length of the tape-like substrate 3 may be lowered.

  On the other hand, by engaging the left and right perforations 34 of the tape-shaped substrate 3 with the sprockets 42 and 43, respectively, the tape-shaped substrate 3 is bent downward by its own weight between the left and right guide rails 32. Can be suppressed. Further, the tape-like substrate 3 can be prevented from meandering and being conveyed, and the detection accuracy of the conveyance length of the tape-like substrate 3 is increased. In the tape-like substrate 3, since the left and right perforations 34 are engaged with the sprockets 42 and 43, the tape-like substrate 3 is difficult to be detached from the sprockets 42 and 43 and the guide rail 32.

  Further, the sprockets 42 and 43 that engage with the perforations 34 formed on the left and right sides of the tape-like substrate 3 are integrated with the rotary shaft 45 as described above. Therefore, the sprockets 42 and 43 rotate more faithfully with respect to the conveyance of the tape-shaped substrate 3, and the detection accuracy of the conveyance length of the tape-shaped substrate 3 becomes high.

  Based on the transport length and transport speed of the tape-shaped substrate 3 detected by the transport length detection mechanism 31 according to the speed control program incorporated in the control unit 25, the control unit 25 performs the transport speed of the control unit tape-shaped substrate 3. Is controlled as shown in FIG. In FIG. 10A, the vertical axis represents the transport speed V of the tape-like substrate 3, and the horizontal axis represents the transport length L that is the length transported from the stopped state. The conveyance length L4 is a length by which the tape-like substrate 3 is conveyed by one conveyance. That is, FIG. 10A shows a change in the conveyance speed while the tape-like substrate 3 is conveyed from the stop state to the conveyance length L4.

  The controller 25 drives and controls the front-side transport mechanism 33A and the rear-side transport mechanism 33B so as to accelerate to the transport speed V1 while the tape-shaped substrate 3 is transported to the transport length L1 from the stop state 0. Thereafter, while the tape-shaped substrate 3 is transported to the transport length L2, the front-side transport mechanism 33A and the rear-side transport mechanism 33B are driven and controlled so that the tape-shaped substrate 3 is transported at a predetermined transport speed V1. If the tape-like substrate 3 is transported to the transport length L2, the front transport mechanism 33A and the rear transport mechanism 33B are set so as to decelerate to the transport speed V2 as a low speed while being transported to the transport length L3. Drive control. Then, when the tape-like substrate 3 is transported by the transport length L4, the transport is stopped.

  When the tape-like substrate 3 is conveyed, the conveyance speed V1 is an engagement between the perforation 34 and the sprockets 42 and 43 due to vibrations generated in the tape-like substrate 3 or the front-side conveyance mechanism 33A and the rear-side conveyance mechanism 33B. Set to a high speed within the speed range that does not cause accidents. By setting the transport speed V1 to a high speed, the transport time of the tape-like substrate 3 can be shortened.

  On the other hand, the conveyance speed V2 is such that when the driving of the front conveyance mechanism 33A and the rear conveyance mechanism 33B is stopped, the motors 35, 38, the conveyance rollers 17, 18 and the like rotate by inertia, or the tape substrate 3 moves by inertia. As a result, the sprockets 42 and 43 are set to a conveyance speed that does not rotate due to inertia even though the stop position overruns the conveyance length L4 or the conveyance of the tape-like substrate 3 is stopped. To do. That is, the transport speed V2 is a speed at which the tape-like substrate 3 can be stopped with a predetermined position accuracy when the driving of the front transport mechanism 33A and the rear transport mechanism 33B is stopped.

  The predetermined positional accuracy is, for example, 50 μm or 30 μm, and the target mark alignment position on the imaging surface and the target mark 23 required by the shooting angle of view of the camera device 24 and the stop time of transport of the tape-like substrate 3 are determined. It is determined according to the allowable range of the deviation distance from the imaging position. When the shooting angle of view of the camera device 24 is narrow, or the stop time of transport of the tape-like substrate 3 is short, it is required to shorten the distance of deviation between the target mark alignment position and the target mark 23 imaging position. In such a case, high accuracy is required. On the contrary, when the shooting angle of view of the camera device 24 is wide, or when the tape substrate 3 is not transported long, the shift distance between the target mark alignment position and the image formation position of the target mark 23 is shortened. When it is not necessary to do so, high accuracy is not required.

  The distance from the conveyance length L3 to L4 for maintaining the conveyance speed V2 is set in consideration of the time until the conveyance speed V2 is settled after decelerating from the conveyance speed V1 to the conveyance speed V2. FIG. 10B shows a state in which a portion indicated by a dotted line A in FIG. When the rotation of the motors 35 and 38 is reduced to the rotation corresponding to the transport speed V2 of the tape-shaped substrate 3 by the control of the control unit 25, the transport speed from the transport speed V1 of the tape-shaped substrate 3 is controlled by the control unit 25. Even if the speed is reduced to V2, the actual transport speed of the tape-like substrate 3 is not immediately stabilized at the transport speed V2, as shown in FIG. Due to the inertia of the motors 35, 38 and the transport rollers 17, 18, etc., the transport speed changes until the transport speed of the tape-like substrate 3 settles to the transport speed V2, as shown in FIG. There will be fluctuations in speed. The distance from the conveyance length L3 to L4 is set in consideration of the time until the deflection is settled and the conveyance speed V2 is stabilized.

  For example, an operation of applying a thermosetting resin to the tape-like substrate 3 in which the formation pitch of the perforations 34 is 4.8 mm and the arrangement pitch of the electronic components 4 is every 5 perforations (= 24.0 mm). When performing, the conveyance lengths L1, L2, L3, and L4 and the conveyance speeds V1 and V2 are set as follows, for example.

  In the present embodiment, since the electronic components 4 are transported four by four, the transport length L4 is 4.85 mm × 5 × 4 = 96 mm. The transport length L1 is set to 10 mm, the transport speed V1 is set to 100 mm / sec, the transport length L2 is set to 83 mm, the transport length L3 is set to 90 mm, and the transport speed V2 is set to 5 mm / sec. The conveyance lengths L1, L2, L3, and L4 and the conveyance speeds V1 and V2 are appropriately set in consideration of the weight of the electronic component 4, the inertia weight of the rotation of the sprockets 42 and 43, and the like. FIG. 10A shows the conveyance speed, the change in the conveyance speed, and the conveyance distance in an easily understandable manner, and the scales of the vertical axis and the horizontal axis are not drawn accurately.

  Returning to FIGS. 8 and 9, the configuration of the transport length detection mechanism 31 will be further described.

  A rotary encoder 44 provided in the transport length detection mechanism 31 is attached to an encoder attachment plate 48, and the encoder attachment plate 48 is attached to a support column 49 attached to the left side surface of the guide rail 32. That is, the rotary encoder 44 is attached to the guide rail 32 via the support pillar 49 and the encoder attachment plate 48. The encoder mounting plate 48 and the support column 49 are connected by a shaft 50, and the encoder mounting plate 48 is supported by the shaft 50 so as to be rotatable in the vertical direction with respect to the support column 49.

  The encoder mounting plate 48 has a plate body as a whole, and the rotary encoder 44 is mounted on the surface of the encoder mounting plate 48 opposite to the guide rail 32 by fastening means such as screws (not shown).

  A stopper 51 is provided behind the upper edge of the encoder mounting plate 48 to restrict the rotational position below the encoder mounting plate 48, that is, counterclockwise about the shaft 50. A protruding piece 52 that protrudes toward the support column 49 is formed behind the upper edge of the encoder mounting plate 48, and the stopper 51 is provided on the lower surface of the protruding piece 52. The stopper 51 abuts on the upper end surface 49 </ b> A of the support column 49, thereby restricting the counterclockwise rotation position of the encoder mounting plate 48. That is, as shown in FIGS. 8A and 8B, the stopper 51 abuts against the upper end surface 49A of the support column 49, so that the counterclockwise rotation of the encoder mounting plate 48 is restricted.

  When the stopper 51 is in contact with the upper end surface 49A of the support column 49 and the counterclockwise rotation of the encoder mounting plate 48 is restricted, the portions of the pins 46 and 47 of the sprockets 42 and 43 form the guide rail 32. The length or the like of the stopper 51 is set so as to be positioned in the recessed portion 32A (see FIGS. 6 and 7). Therefore, in a state where the stopper 51 is in contact with the upper end surface 49A of the support column 49, the pins 46 and 47 of the sprockets 42 and 43 enter the perforation 34 of the tape-like substrate 3 conveyed on the guide rail 32. Is engaged. That is, the transport length detection mechanism 31 is in a transport length detectable state in which the transport length of the tape-like substrate 3 can be detected.

  9A and 9B, the encoder mounting plate 48 rotates clockwise from the conveyance length detectable state shown in FIGS. 8A and 8B. When the portions of the pins (teeth) 46 and 47 of the sprockets 42 and 43 are located above the outer side of the recess 32A, the pins 46 and 47 of the sprockets 42 and 43 become the perforations 34 of the tape-like substrate 3. It is in the retracted state where it has entered and is not engaged. In this retracted state, a gap is opened between the sprockets 42 and 43 and the guide rail 32, so that the tape-like substrate 3 can be taken out from the top of the guide rail 32 to the right.

  The encoder mounting plate 48 is provided with a ball plunger 54 having a ball portion 53 that comes into contact with the left side surface of the support column 49 while being pressed by a biasing means such as a coil spring (not shown). A concave portion 55 into which the ball portion 53 is fitted when the encoder mounting plate 48 is rotated to the retracted state at the position shown in FIGS. 9A and 9B is formed on the left side surface of the support column 49. Therefore, in the retracted state, the ball portion 53 fits into the recess 55, and the fitting state between the ball portion 53 and the recess 55 is maintained by the urging force of the urging means (not shown) of the ball plunger 54. In other words, the retracted state is maintained by maintaining the fitted state of the transport length detection mechanism 31, the ball portion 53, and the concave portion 55.

  In this embodiment, the ball portion 53 is at a position where the transport length detection mechanism 31 is rotated about 40 degrees clockwise from the transport length detectable state (the state shown in FIGS. 8A and 8B). And the recess 55 are configured to be fitted. The rotation angle at which the transport length detection mechanism 31 is in the retracted state is preferably set within a range of 20 degrees to 45 degrees. By making the rotation angle of the transport length detection mechanism 31 clockwise 20 degrees or more, it becomes easy to take out the tape-like substrate 3 from the top of the guide rail 32 in the right direction. Further, since the rotation amount of the transport length detection mechanism 31 in the clockwise direction is set to 45 degrees or less, the amount of rotation upward of the transport length detection mechanism 31 is reduced, so that the tape transport device 1 can be downsized. .

  The sprockets 42 and 43 are positioned in the left-right direction by flange portions 56 and 57 provided on the rotary shaft 45 of the rotary encoder 44. Then, the sprockets 42 and 43 are fixed to the rotating shaft 45 by sandwiching the sprockets 42 and 43 between the flange portions 56 and 57 with the presser nuts 58 and 59 so that the sprockets 42 and 43 do not rotate around the rotating shaft 45. It is attached. A male screw and a female screw (not shown) are formed between the presser nuts 58 and 59 and the rotary shaft 45. The press nuts 58 and 59 sandwich the sprockets 42 and 43 with respect to the flange portions 56 and 57 by screw connection of these male and female screws. Further, the rotation prevention of the sprockets 42 and 43 with respect to the rotating shaft 45 may have a structure in which a wedge-shaped part is inserted into each processed groove.

  As shown in FIG. 8 (B), the pins 46 and 47 formed on the sprockets 42 and 43 have a distance H on the outer side in the left and right direction with respect to the center M of the thickness W in the left and right direction of the sprockets 42 and 43. It is disposed at the biased position M1, and the distance between the pin 46 and the pin 47 is D1. As described above, when the sprockets 42 and 43 in which the pins 46 and 47 are disposed at the position M1 deviated with respect to the center M are attached to the rotary shaft 45 by reversing the left and right surfaces, respectively, The position 47 is arranged at a position M2 shown in FIG. This position M2 is a position deviated by a distance H on the inner side in the left-right direction with respect to the center M of the thickness W of the sprockets 42, 43. Therefore, the distance D2 between the pins 46 and 47 of the left and right sprockets 42, 43 is narrower than the distance D1.

  By the way, in the tape-like substrate 3 on which the electronic component 4 is mounted, for example, as shown in the table shown in FIG. 12, there are 35 mm type, 48 mm type, and 70 mm type tape widths. Among the tape-like substrates 3 of each tape width type, there is a tape-like substrate 3 of a type in which the left and right perforation intervals are different.

  The numerical values in the table (see FIG. 12) are values obtained by converting the standard values of each part (tape width, perforation width, etc.) of the tape-like substrate 3 standardized in inches into millimeters, and are numbers with one decimal place or less. Is a reference level.

  The “perforation width” column indicates a left and right perforation interval Pwd (see FIG. 2A). The “perforation pitch” column indicates a pitch interval Pd (see FIG. 2A) of arrangement of perforations adjacent in the front-rear direction. The “perforation hole width” column indicates the width Pw (see FIG. 2A) of one perforation hole in the left-right direction. The “perforation hole length” column indicates the length PL in the front-rear direction of one perforation hole (see FIG. 2A). The “perforation edge distance” column shows the perforation and the edge distance Pe of the tape-like substrate 3 (see FIG. 2A).

  As shown in the table (see FIG. 12), the tape-shaped substrate 3 includes the tape-shaped substrate 3 having a different “perforation width” in the tape-shaped substrate 3 of the same tape width type. There are three types of 35 mm type tape-like substrates 3 of “standard type”, “wide type”, and “super wide type” depending on the difference in “perforation width”. There are two types of 48 mm type tape-like substrate 3, “wide type” and “super wide type”, depending on the difference in “perforation width”. Further, the 70 mm type tape-like substrate 3 is classified into three types, “standard type”, “wide type”, and “super wide type”, depending on the difference in “perforation width”.

The distance H for biasing the pins 46 and 47 with respect to the center line M is the center of the left and right perforations in two of the same tape width types (for example, “wide type” and “ultra wide type”). It is set to one quarter of the difference of the interval Pc (see FIG. 2). Thus, when the pins 46 and 47 are arranged so as to be deviated with respect to the center line M, the left and right sprockets 42 and 43 when the left and right surfaces of the sprockets 42 and 43 are reversed and attached to the rotary shaft 45 are arranged. The distances D1 and D2 between the pin 46 and the pin 47 correspond to the center distance Pc of the perforations of the two types of tapes (“wide type” and “super wide type”), respectively.

  For example, the perforation center interval Pc between the “wide type” tape-like substrate 3 of the 48 mm type tape-like substrate 3 and the “super-wide type” tape-like substrate 3 is 42.0 mm (= 40.0 + (2 0.0 / 2) × 2) and 44.8 mm (= 43.4 + (1.4 / 2) × 2), and the difference is 2.8 mm (= 44.8-42.0). Accordingly, the distance H for biasing the pins 46 and 47 with respect to the center M is 0.7 mm (= 2.8 / 4), which is a quarter of 2.8 mm. Then, the sprockets 42 and 43 whose pins 46 and 47 are disposed by 0.7 mm from the center line M are arranged on the rotary shaft 45 so that the side on which the pins 46 and 47 are biased is outside in the left-right direction. Attach (see FIG. 8B). In this way, when the sprockets 42 and 43 are attached to the rotating shaft 45 so that the side where the pins 46 and 47 are biased is outside in the left and right direction, the pins 47 and 47 of the left and right sprockets 42 and 43 are The disposition position of the flange portions 56 and 57 with respect to the rotating shaft 45, the thickness W of the sprockets 42 and 43, and the like are set so that the distance D1 is 44.8 mm.

  When the sprockets 42 and 43 configured as described above are attached to the rotary shaft 45 configured as described above with the side where the pins 46 and 47 are biased outward, the distance between the pin 46 and the pin 47 D1 is 44.8 mm as described above. On the other hand, when the left and right surfaces of the sprockets 42 and 43 are inverted and attached to the rotary shaft 45, the pins 46 and 47 of the sprockets 42 and 43 are respectively located with respect to the center M as shown in FIG. And inside. That is, the position M2 is offset by 0.7 mm from the center M. At this time, the distance D2 between the pins 46 and 47 of the left and right sprockets 42 and 43 is 42.0 mm, which is the center distance Pc of the “wide type” perforation.

  That is, by simply reversing the left and right surfaces of the sprockets 42 and 43, the width in the left-right direction of the sprockets 42 and 43 can be made to correspond to two types of “perforation width” tapes. Accordingly, there is no need to replace the rotating shaft 45 and the sprockets 42 and 43 for each tape-like substrate 3 having a different “perforation width”. There are three types of combinations of two “perforation width” tape-like substrates 3 that can be handled by one type of sprocket: standard type and wide type, wide type and ultra-wide type, and ultra-wide type and standard type. By using such a sprocket, the types of sprockets prepared for the production can be reduced from three to two. Recently, since it is rare to use the standard width type, it has become possible to make one combination of the wide type and the ultra-wide type. Sprockets have complex tooth shapes and require a long time to process. Reducing the number of sprocket types saves resources and further facilitates workability and inventory management.

  The thickness W of the sprockets 42 and 43 is the thickness interval between the abutting surfaces with respect to the flange portions 56 and 57 when the sprockets 42 and 43 are attached to the rotating shaft 45 with the left and right surfaces reversed. .

  The tape transport device 1 described above includes a front transport device 32 and a rear transport device 33 before and after the region where the resin coating head actuating device 9 is disposed, that is, the work region. However, the front side transport device 32 may be provided only on the front side of the resin coating head operating device 9.

  In addition, the tape transport device 1 described above is configured to include the sprocket 42 and the sprocket 43 so as to be engaged with both of the two perforations 34 formed on the left and right sides of the tape-shaped substrate 3. It can also be set as the structure engaged with the perforation 34 of either the left or right side.

  In addition, the sprocket 42 and the sprocket 43 provided in the tape transport device 1 described above are configured to rotate together with respect to the rotation shaft 45. That is, the transport length of the tape-like substrate 3 is detected by two sprockets of the sprocket 42 and the sprocket 43. On the other hand, either of the sprockets 42 and 43 can be configured to be rotatable with respect to the rotation shaft 45 without being fixed to the rotation shaft 45.

  Even in this case, the tape-like substrate 3 is engaged by the sprockets 42 and 43 at two positions on the left and right sides in the width direction, so that the tape-like substrate 3 is slackened in the width direction. This can be suppressed, and the tape-like substrate 3 can be prevented from being meandered and conveyed. Therefore, the detection accuracy of the conveyance length of the tape-like substrate 3 can be increased. Further, since the perforations 34 are engaged with the sprockets 42 and 43 at two positions on the left and right sides in the width direction, the tape-like substrate 3 is difficult to be detached from the sprockets 42 and 43.

  Although the tape transport device 1 described above has been shown as an example of being used in the resin coating device 5 in combination with the resin coating head actuating device 9, in addition to the electronic component mounting device for mounting the electronic component 4 on the tape, the tape Therefore, the present invention can be used for a tape working device that performs various operations.

  The control unit 25 may be configured as an external device such as a personal computer in addition to being incorporated in the resin coating system 2 as a control circuit unit. As the rotary encoder 44, a so-called incremental type or absolute type can be used. Also, a magnetic or optical detection type can be used. Instead of the rotary encoder, the rotation amount of the sprockets 42 and 43 may be detected by a potentiometer.

It is a figure which shows the schematic structure of the resin coating system using the working device for tapes concerning embodiment of this invention. It is a figure which shows the schematic structure of the tape-shaped board | substrate used as the object which the resin application | coating system shown in FIG. 1 handles, FIG. 2 (A) is a top view of a tape-shaped board | substrate, and FIG. It is a side view of a board | substrate. It is a figure which shows the structure of the outline of the resin coating head actuator used for the resin coating system shown in FIG. It is the top view which looked at the tape conveyance apparatus which concerns on embodiment of this invention from upper direction. It is the side view which looked at the tape conveyance apparatus shown in FIG. 4 from the right side. FIG. 5 is a cross-sectional view taken along a cutting line AA shown in FIG. 4. FIG. 5 is a cross-sectional view taken along a cutting line BB shown in FIG. 4. FIG. 5 is a partially enlarged view of the conveyance length detection unit illustrated in FIG. 4, showing a conveyance length detectable state in which the conveyance length can be detected, and (A) is a side view of the conveyance length detection unit as viewed from the right side; ) Is a plan view of the transport length detection unit shown in FIG. It is the elements on larger scale of the conveyance length detection part shown in FIG. 4, and shows the retracted state which can detect conveyance length, (A) is the side view which looked at the conveyance length detection mechanism from the right side, (B) It is the top view which looked at the conveyance length detection mechanism shown to (A) from the front side. It is a figure which shows the conveyance speed of the tape-shaped board | substrate in the tape conveyance apparatus of the resin coating system shown in FIG. 1, (A) is a change of the conveyance speed during conveyance from the stop state of a tape-shaped board | substrate to conveyance length L4. (B) shows the state which expanded the part of the dotted line A of (A). It is a figure which shows the state which each left and right surface was reversed and each sprocket attached to the rotating shaft of the conveyance length detection part shown in FIG. 4 was attached to the rotating shaft. It is a table | surface which shows the type of the tape-shaped board | substrate used for the resin coating system shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Tape conveyance apparatus 3 ... Tape-like board | substrate (tape)
5 ... Resin coating device (tape working device)
25 ... Control means (control part)
32 ... Front side transport mechanism (transport means)
33 ... Rear transport mechanism (transport means)
34 ... Perforation 42, 43 ... Sprocket 44 ... Rotary encoder (rotation amount detection means)
46, 47 ... Pin

Claims (7)

In the tape transport device that transports the tape in which perforation is formed in the long direction intermittently while transporting and stopping in the long direction by the transport means,
A sprocket that engages with the perforation and is driven to rotate as the tape is conveyed;
A rotation amount detecting means for detecting the rotation amount of the sprocket;
And a control means for controlling the drive of the conveying means based on the rotation amount of the sprocket by the rotation amount detecting means.   Before stopping the tape transport, the control means reduces the tape transport speed to a low speed at which the tape can be stopped with a predetermined position accuracy, and stabilizes at this low speed. The tape transport device according to claim 1, wherein the transport unit stops driving after transporting the tape.   3. The tape transport according to claim 1, wherein the sprocket is disposed between a transport unit provided in front of a work area for performing a predetermined work on the tape and the work area. apparatus.   The tape transport device according to any one of claims 1 to 3, wherein the sprocket is two sprockets respectively engaged with perforations formed on both sides of the tape.   The tape transport device according to any one of claims 1 to 4, wherein the two sprockets rotate integrally.   2. The sprocket according to claim 1, wherein a pin of the sprocket is deviated by a quarter of a difference in perforation center distance between two types of tapes having different perforation widths with respect to a center line of the sprocket. The tape transport device according to 1. The tape transport device according to any one of claims 1 to 6,
A tape working device, comprising: a work performing device that performs a predetermined work on a tape having perforations formed in a longitudinal direction.

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