JP5057409B2 - Flux transfer device - Google Patents

Description

  The present invention relates to a flux transfer apparatus that uniformly spreads a flux on a transfer table to form a flux film.

  When soldering the bumps and terminals of an electronic component to a circuit board using an electronic component mounting machine, for example, Patent Document 1 (Japanese Patent Laid-Open No. 2001-85830) shows an example in order to improve solder wettability. As described above, there is a case where a small flux transfer device is set in the electronic component mounting machine, the flux is transferred to the bumps and terminals of the electronic component in advance, and then soldered.

  This type of flux transfer device rotates a plate-shaped rotary table (transfer table) that stores flux, and forms a flux film by uniformly spreading the flux on the rotary table with a squeegee placed above it. Then, the rotation of the rotary table is stopped, and the bumps and terminals of the electronic components adsorbed by the suction nozzle of the electronic component mounting machine are immersed in the flux film on the rotary table, thereby transferring the flux to the bumps and terminals of the electronic components. Like to do.

  Japanese Patent Application Laid-Open No. 10-76210 discloses that a transmissive photoelectric sensor and a laser sensor are used as a remaining amount sensor for detecting the remaining amount of flux on the transfer table.

JP 2001-85830 A (pages 3 to 4 etc.) Japanese Patent Laid-Open No. 10-76210 (pages 3 to 4 etc.)

  However, when the remaining amount of flux on the transfer table is detected by the remaining amount sensor, there is a problem that it is difficult to detect because the flux is a transparent viscous fluid that is difficult to detect.

  In order to achieve the above object, the invention according to claim 1 is to supply a flux onto the transfer table and form a flux film by uniformly spreading the flux on the transfer table with a squeegee arranged above the transfer table. In the flux transfer apparatus for transferring the flux to the transfer object by immersing the transfer object in the flux film, the residual amount sensor for monitoring the remaining amount of the flux stored in the transfer table is provided. The remaining amount sensor is constituted by a reflection type optical sensor that detects reflected light by projecting light from above toward a rising portion of the flux scraped by the squeegee during the squeegeeing operation. It is what. As in the present invention, when light is projected from above toward the swelled portion of the flux scraped by the squeegee during the squeegeeing operation, the less the bulge of the flux in the flooded region, the more the flux surface of the flooded region Since it approaches the flat surface, light irregular reflection and refraction at the flux surface in the light projecting area are reduced, and the amount of reflected light received by the reflective photosensor increases. Therefore, if the reflected light quantity received by the reflective optical sensor exceeds a preset level, the optical sensor detects this, so that the flux is a transparent viscous fluid that is difficult to detect. Even in such a case, it is possible to accurately detect the lack of swell of the flux scraped off by the squeegee (insufficient amount of remaining flux).

  In this case, the flux supply means for supplying the flux onto the transfer table and the flux supply means are operated when it is determined that the remaining amount of flux is insufficient based on the output signal of the remaining amount sensor. It is preferable to provide a control means for supplying flux onto the transfer table. In this way, each time a shortage of the flux remaining in the transfer table is detected, the flux can be automatically replenished on the transfer table, and soldering failure due to the lack of flux can be prevented. Occurrence can be prevented and soldering quality and reliability can be improved.

  In this case, if the amount of flux scraped off by the squeegee becomes too small, the unevenness on the surface of the flux film caused by the immersion of the transfer object such as the bump cannot be leveled, and the bump or the like The flux cannot be uniformly transferred to the transfer object.

  Considering this point, the amount of flux scraped off by detecting the amount of flux scraped off by the squeegee based on the output signal of the remaining amount sensor during the squeezing operation for forming the flux film as in claim 3 It is better to monitor the amount. In this way, it is possible to accurately detect the shortage of the remaining amount of flux during the squeezing operation.

  In general, the squeegee has a linear shape at the edge where the flux is scraped off. The present invention may use such a squeegee having a straight edge shape. However, if the flux on the rotating transfer table is spread with a squeegee having a straight edge shape, the flux is shifted from the center side of the edge of the squeegee to both ends thereof. Since there is a tendency to flow toward, the flux on the center side of the squeegee tends to be relatively small. For this reason, if the remaining amount of the flux on the rotating transfer table decreases, there is a possibility that the flux is locally insufficient at the center side of the squeegee and the surface of the flux film cannot be leveled.

  As a countermeasure against this, in the rotation type in which the squeegee is rotated by rotating the transfer table, the shape of the edge portion of the squeegee is preferably formed in an arc shape whose center side is curved in the rotation direction of the transfer table. . In this way, when the flux on the rotating transfer table is spread with the squeegee, the curved shape of the edge portion of the squeegee prevents the flux from flowing from the center side of the edge of the squeegee toward both ends thereof. It is possible to prevent the flux from being locally insufficient on the center side of the squeegee.

  In the case of the linear motion type in which the transfer table is fixed and the squeegee is moved linearly in the horizontal direction, or the transfer table is moved linearly in the horizontal direction by fixing the squeegee, a linear edge squeegee may be used. .

  According to a fifth aspect of the present invention, the flux supply means includes a tank that stores the flux, an air supply source that supplies air into the tank and pushes the flux from the discharge nozzle of the tank onto the transfer table by air pressure. It is preferable that the tank internal pressure be maintained at a pressure slightly higher than the atmospheric pressure so that the residual flux in the discharge nozzle does not flow back into the tank when the flux supply is stopped.

  According to the research results of the present inventors, when the tank internal pressure is the same as the atmospheric pressure while the flux supply is stopped, the phenomenon that the residual flux in the discharge nozzle flows back into the tank due to surface tension or the like occurs. There was found. When this reverse flow phenomenon occurs, when the air is supplied into the tank and the flux is pushed out onto the transfer table by air pressure from the discharge nozzle of the tank, the amount of flux extrusion varies, and the amount of flux replenished to the transfer table is reduced. Not stable.

  As a countermeasure against this, if the tank internal pressure is maintained at a pressure slightly higher than the atmospheric pressure while the flux supply is stopped, the residual flux in the discharge nozzle flows back into the tank while the flux supply is stopped. And the amount of flux replenished to the transfer table can be stabilized.

It is a vertical side view of the principal part which shows the state which set the flux transfer apparatus main body in one Example of this invention in the set position in an electronic component mounting machine. It is a partial fracture side view of the principal part which shows the state which set the flux transcription | transfer apparatus main body to the setting position in an electronic component mounting machine. It is a partially broken side view of the principal part which shows the state just before attaching a flux transfer apparatus in an electronic component mounting machine. It is a vertical side view of the principal part which shows the state which pulled out the flux transfer apparatus main body to the drawer position of the outer side of an electronic component mounting machine. It is a top view of a flux transfer device main body. It is a figure explaining the residual amount shortage detection method of a flux (It is a figure when the residual amount of flux is not short). It is a figure explaining the residual amount shortage detection method of a flux (it is a figure when the residual amount of flux is insufficient). It is a figure explaining the structure of a flux supply apparatus. It is a time chart explaining the operation | movement of a flux supply apparatus, and the change of a tank internal pressure.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment embodying a mode for carrying out the present invention will be described with reference to the drawings. The flux transfer device 10 includes a mounting base 12 mounted on the mounting portion 11 of the electronic component mounting machine 20 and a flux transfer device main body 14 mounted on the mounting base 12. The flux transfer device main body 14 is mounted on the mounting base 12. Slide movement between an inner set position (position in FIG. 1) and an outer drawing position (position in FIG. 4) of the electronic component mounting machine 20 along two guide rails 13 provided on the upper surface of the base 12 It is configured to be able to.

  The mounting part 11 of the electronic component mounting machine 20 has a common mounting structure so that it can also be used as a mounting part of an electronic component supply device (feeder). More specifically, a mounting guide groove 15 extending in the attaching / detaching direction of the flux transfer device 10 is formed on the bottom surface of the mounting portion 11, and a ridge portion provided on the lower surface of the mounting base 12 of the flux transfer device 10. 16 is fitted in the mounting guide groove 15.

  A rising plate 17 is erected vertically at the front end portion (advance end portion) of the mounting base 12, and a stopper 18 for the flux transfer device main body 14 is provided on the rising plate 17, so that the operator can operate the flux transfer device main body. When the base plate 19 of the flux transfer device main body 14 comes into contact with the stopper 18 when the 14 is pushed into the set position inside the electronic component mounting machine 20, the flux transfer device main body 14 is stopped at the set position. Yes.

  Further, the rising plate 17 of the mounting base 12 is engaged with the connector 22 for connecting the signal line / power line of the flux transfer device 10 to the connector 21 on the mounting portion 11 side, and the mounting base 12 on the mounting portion 11 side. Engagement pins 23 and 24 (see FIG. 3) for fixing are provided, and the engagement pins 23 and 24 are inserted into engagement holes 25 and 26 (see FIG. 3) in the back wall portion of the mounting portion 11. Thus, the mounting base 12 is engaged and fixed to the mounting portion 11 side. As shown in FIGS. 2 and 3, a lock member 27 is attached to the attachment base 12 so as to be movable up and down while being biased downward by a spring 28.

  When the mounting base 12 is mounted on the mounting portion 11, as shown in FIG. 2, when the mounting base 12 is pushed into the mounting portion 11 until the rising plate 17 comes into contact with the back wall portion of the mounting portion 11, the lock member 27 is moved. It will be in the state where it fitted in the lock hole 29 of the mounting part 11. As a result, the mounting base 12 is locked in a state of being mounted on the mounting portion 11, and the engaging pins 23 and 24 of the rising plate 17 are inserted into the engaging holes 25 and 26 in the rear wall portion of the mounting portion 11, In addition, the connector 22 on the flux transfer device 10 side is connected to the connector 21 on the mounting portion 11 side. The signal line and the power line of the flux transfer device main body 14 are wired to the mounting base 12 side by a cable bearing 42 and connected to the connector 22.

  A portion of the mounting base 12 positioned outside the mounting portion 11 is provided with a lock release lever 31, and a wire 32 (see FIGS. 2 and 3) is provided between the lock release lever 31 and the lock member 27. It is connected. The lock release lever 31 is urged to rotate in the lock direction (counterclockwise direction in FIG. 2) by a torsion coil spring (not shown). When the mounting base 12 is removed from the mounting portion 11, the lock member 27 is locked against the urging force of the spring 28 by rotating the lock release lever 31 in the lock release direction (clockwise direction in FIG. 2). It can be lifted from the hole 29 to be unlocked.

  As shown in FIGS. 2 and 3, a second safety switch 33 for detecting lock / unlock is provided in the vicinity of the lock member 27. In this case, when the mounting base 12 is mounted on the mounting portion 11 and the second lock member 27 is fitted in the lock hole 29 (locked state), the second lock member 27 causes the second lock member 27 to The safety switch 33 is maintained in the ON state, and the operation of the flux transfer device main body 14 is permitted. Then, when the mounting base 12 is removed from the mounting portion 11, when the second lock member 27 is lifted from the lock hole 29 by the rotation operation of the lock release lever 31 and unlocked, the second safety switch 33 is turned off. As a result, the operation of the flux transfer device main body 14 is prohibited.

Next, the configuration of the flux transfer apparatus main body 14 supported on the mounting base 12 so as to be slidable will be described.
As shown in FIGS. 1 and 4, a first lock member 34 (lock means) is attached to the flux transfer apparatus main body 14 so as to be movable up and down while being biased downward by a spring 35. The lock member 34 is fitted into the lock holes 36 and 37 formed in the mounting base 12, so that the flux transfer device main body 14 is set to the inner set position (position in FIG. 1) and the outer side of the electronic component mounting machine 20. Each is locked at the drawer position (position in FIG. 4).

  In the flux transfer apparatus main body 14, a lock release handle 38 is slidably provided on a handle support frame 39, and the lock release handle 38 and the first lock member 34 are connected by a wire 40. The lock release handle 38 is urged by a spring 48 in a locking direction (a direction in which the flux transfer device main body 14 is pushed into the set position). The lock release handle 38 also serves as a handle gripped by an operator when the flux transfer device main body 14 is slid, and is disposed so as to be located outside the electronic component mounting machine 20.

  When the flux transfer device main body 14 is slid between the set position and the drawer position, the first lock member is operated by pulling the lock release handle 38 in the lock release direction (the direction opposite to the lock direction). The lock 34 can be lifted from the lock holes 36 and 37 against the urging force of the spring 35 to be unlocked.

  Further, a first safety switch 41 for detecting lock / unlock is provided in the vicinity of the first lock member 34. In this case, when the flux transfer device main body 14 is set at the set position (or the drawing position) and the first lock member 34 is in the locked state fitted in the lock hole 36 (or 37), the first The first safety switch 41 is maintained in the ON state by the lock member 34 so that the operation of the flux transfer device main body 14 is permitted. When the flux transfer device main body 14 is slid between the set position and the drawer position, when the first lock member 34 is lifted from the lock holes 36 and 37 by the pull operation of the lock release handle 38, the lock is released. The first safety switch 41 is switched to the OFF state, and the operation of the flux transfer device main body 14 is prohibited.

  Further, as shown in FIGS. 1 and 4, as means for detecting that the flux transfer apparatus main body 14 is set at the set position, a photoelectric switch 42 such as a transmissive photo interrupter is provided on the rising plate 17 of the mounting base 12. , And the flux transfer device main body 14 is set at the set position, so that the detection protrusion 43 provided at the forward end of the flux transfer device main body 14 is located between the light emitting element and the light receiving element of the photoelectric switch 42. The optical path is blocked and the photoelectric switch 42 is turned off.

  In this case, when the photoelectric switch 42 is in the off state (the state where the detection protrusion 43 is detected) and the first safety switch 41 is in the on state (the first lock member 34 is in the locked state), the flux It is determined that the transfer device main body 14 is set at the set position, and automatic operation of the flux transfer device main body 14 is permitted. On the other hand, the photoelectric switch 42 is in an ON state (a state where the detection protrusion 43 is not detected), and When the first safety switch 41 is in the on state (the first lock member 34 is in the locked state), it is determined that the flux transfer device main body 14 is set at the pull-out position, and the flux transfer device main body 14 Manual operation is permitted.

  On the other hand, the base plate 19 of the flux transfer apparatus main body 14 is provided with a turntable 51 on which a dish-like turntable 50 (transfer table) made of a magnetic material such as an iron-based material is placed. The rotary table 50 is detachably attracted and held by the provided magnet 52. Then, the upper end portion of the rotary shaft 53 of the turntable 51 protrudes slightly above the upper surface of the turntable 51, and a fitting hole 55 formed at the center of the lower surface of the turntable 50 is fitted into the upper end portion of the turntable 53. As a result, the center of the turntable 50 is made to coincide with the center of rotation of the turntable 51, and further, the detent pin 54 provided upward at the eccentric position on the upper surface of the turntable 51 is provided at the eccentric position on the lower surface of the turntable 50. By fitting the rotation-preventing hole 56, the rotation table 50 is prevented from rotating with respect to the turntable 51, and both are rotated together.

  Further, the base plate 19 is provided with a motor 57 serving as a drive source for the rotary table 50 facing downward, and is fitted to a pulley 58 fitted to the rotation shaft of the motor 57 and a lower end portion of the rotation shaft 53 of the turntable 51. A belt 60 is stretched between the pulley 59. Thereby, the rotational force of the motor 57 is transmitted to the rotation shaft 53 of the turntable 51, the turntable 51 is rotated, and the turntable 50 is rotated integrally therewith.

  As shown in FIGS. 5 to 7, a squeegee 61 having a length substantially the same as the radius is arranged above the turntable 50 along the radial direction of the turntable 50, and by rotating the turntable 50, The flux on the rotary table 50 is uniformly spread by a squeegee 61 to form a flux film. In order to be able to adjust the film thickness of the flux film, a height adjusting mechanism 64 for adjusting the height position of the squeegee 61 is provided, and the squeegee 61 is adjusted by adjusting the height position of the squeegee 61 by the height adjusting mechanism 64. The gap between 61 and the bottom surface of the rotary table 50 can be adjusted. The squeegee 61 is detachably attached to the height adjustment mechanism 64.

  The squeegee 61 may be one in which the shape of the edge 61a for scraping off the flux is formed in a straight line shape. However, when the flux on the rotary table 50 is spread with the squeegee 61 having such a straight edge shape, Since the flux tends to flow from the center side of the edge 61a of the squeegee 61 toward both ends thereof, the flux on the center side of the squeegee 61 tends to be relatively reduced. For this reason, when the remaining amount of the flux on the rotary table 50 decreases, there is a possibility that the flux is locally insufficient on the center side of the squeegee 61 and the surface of the flux film cannot be leveled.

  As a countermeasure, in this embodiment, the shape of the edge 61a for scraping off the flux of the squeegee 61 is formed in an arc shape in which the center side is curved in the rotation direction of the rotary table 50 (see FIG. 5). In this way, when the flux on the rotary table 50 is spread by the squeegee 61, the fact that the flux flows from the center side of the edge 61a of the squeegee 61 toward both ends thereof is curved at the edge 61a portion of the squeegee 61. This can be prevented by the shape, and it can be prevented that the flux is locally insufficient on the center side of the squeegee 61.

  Further, as shown in FIGS. 6 and 7, a flux scraping surface 61b on the edge 61a side of the squeegee 61 is formed on an inclined surface so as to face obliquely downward, and the flux is scraped downward by the flux scraping surface 61b of the squeegee 61. Scraping while pressing down. In this way, after the flux is transferred to the bumps and terminals of the electronic component 78, the transfer marks remaining on the flux film can be quickly leveled by the squeegee 61.

  In the vicinity of the squeegee 61, a remaining amount sensor 62 for monitoring the remaining amount of flux stored in the rotary table 50 is disposed. The remaining amount sensor 62 includes a reflection type optical sensor 62 including a light projecting element 62 a and a light receiving element 62 b disposed above a rising portion of the flux scraped off by the squeegee 61, and the rotating table 50 is rotating. Further, light is projected from the light projecting element 62a toward the rising portion of the flux scraped off by the squeegee 61, and the reflected light is detected by the light receiving element 62b.

  As described above, when light is projected from above toward the swelled portion of the flux scraped by the squeegee 61 during the rotation of the rotary table 50, the flux surface of the light projecting region decreases as the swell of the flux in the light projecting region decreases. Is approaching a flat surface, light scattering and refraction on the flux surface of the light projection area is reduced, and the amount of reflected light received by the reflective photosensor 54 (mainly the amount of reflected light from the bottom surface of the rotary table 50). Will increase. Considering this characteristic, the optical sensor 62 is configured to detect when the amount of reflected light received by the light receiving element 62b of the reflective optical sensor 62 exceeds a preset level. In this way, even if there is a situation where the flux is a transparent viscous fluid that is difficult to detect, it is possible to accurately detect a lack of swell of the flux scraped by the squeegee 61 (insufficient amount of flux). .

  During operation of the electronic component mounting machine 20, as shown in FIG. 1, the bumps and terminals of the electronic component 78 sucked by the suction nozzle 77 of the electronic component mounting machine 20 are lowered until they contact the bottom surface of the rotary table 50. Then, the bumps and terminals are immersed in a flux film, and the flux is transferred to the bumps and terminals of the electronic component 78.

  Further, the flux transfer device main body 14 is provided with a flux supply device 65 (flux supply means) for supplying a flux onto the rotary table 50. As shown in FIG. 8, the flux supply device 65 includes a tank 66 for storing flux, an air supply source 67 such as a cylinder for supplying air into the tank 66, a one-way throttle valve 68, An electromagnetic switching valve 69 (3-port 2-position switching valve), a second electromagnetic switching valve 70 (2-port 2-position switching valve), and a silencer 71 are included.

  When supplying flux to the rotary table 50, the first electromagnetic switching valve 69 is energized to switch the first electromagnetic switching valve 69 to the air supply position, and the discharge pipe 72 of the air supply source 67 is connected to the inlet of the tank 66. The air discharged from the air supply source 67 is supplied into the tank 66 through the air pipe 73, and the flux is pushed out from the discharge nozzle 74 of the tank 66 onto the rotary table 50 by air pressure. . At this time, the flow rate of air flowing into the tank 66 is reduced to a certain flow rate or less by a one-way throttle valve 68 provided in the middle of the air pipe 73.

  In the present embodiment, the control device (control means) of the electronic component mounting machine 20 monitors the remaining amount of flux on the rotary table 4 based on the output signal of the remaining amount sensor 62, and detects that the remaining amount of flux is insufficient. The first electromagnetic switching valve 69 is energized to automatically replenish the flux on the rotary table 4.

  On the other hand, when the supply of flux to the rotary table 50 is stopped, the power supply to the first electromagnetic switching valve 69 is turned off, the first electromagnetic switching valve 69 is switched to the air supply stop position, and the air supply source 67 The discharge pipe 72 is closed. In this case, as shown in FIG. 9, the second electromagnetic switching valve 70 is energized from the start of flux supply and is maintained at the atmospheric communication position, and the second electromagnetic switching valve 70 is maintained until a predetermined time T elapses after the flux supply is stopped. The energization of the switching valve 70 is continued and the atmospheric communication position is maintained. As a result, the air in the tank 66 is discharged through the path of the one-way throttle valve 68 → the first electromagnetic switching valve 69 → the second electromagnetic switching valve 70 → the silencer 71, and the pressure in the tank 66 is close to atmospheric pressure. The pressure is reduced to. When a predetermined time T has elapsed since the flux supply was stopped (the first electromagnetic switching valve 69 is turned off), the energization of the second electromagnetic switching valve 70 is turned off and the second electromagnetic switching valve 70 is closed. Switch to position and seal tank 66.

  In this case, the predetermined time T is set to a time shorter than the time required for the internal pressure of the tank 66 to be reduced to the atmospheric pressure. Therefore, when the predetermined time T has elapsed from the stop of flux supply and the energization of the second electromagnetic switching valve 70 is turned off and the tank 66 is sealed, the internal pressure of the tank 66 is higher than the atmospheric pressure while the flux supply is stopped. Even a little higher pressure is maintained.

  As described above, if the internal pressure of the tank 66 is equal to the atmospheric pressure while the flux supply is stopped, a phenomenon occurs in which the residual flux in the discharge nozzle 74 flows back into the tank 66 due to surface tension or the like. When this reverse flow phenomenon occurs, when the air is supplied into the tank 66 and the flux is pushed out from the discharge nozzle 74 of the tank 66 onto the rotary table 50 by air pressure, the amount of flux extruded varies, and the flow to the rotary table 50 is varied. Flux replenishment amount is not stable.

  In this regard, as in this embodiment, if the internal pressure of the tank 66 is maintained at a pressure slightly higher than the atmospheric pressure while the flux supply is stopped, the residual flux in the discharge nozzle 74 is transferred to the tank 66 while the flux supply is stopped. It is possible to prevent the flow back into the interior, and the amount of flux replenished to the rotary table 50 can be stabilized.

  As shown in FIG. 5, the flux transfer apparatus main body 14 is provided with an operation panel 75 for manually operating the flux transfer apparatus main body 14 at the pull-out position. When the operator operates the operation panel 75 and performs manual operation in a state where the flux transfer device main body 14 is pulled out to the drawing position, the rotary table 50 is rotated to adjust the film thickness of the flux film. It is possible to supply a flux on the rotary table 50 by forming a film or by operating the flux supply device 65.

  In this case, even before the operation of the electronic component mounting machine 20, the flux is operated by operating the operation panel 75 positioned outside the electronic component mounting machine 20 by the operator while the flux transfer device main body 14 is set at the set position. It is possible to replenish the flux on the rotary table 50 by operating the supply device 65. At this time, the remaining amount of flux on the turntable 4 is detected based on the output signal of the remaining amount sensor 62 while supplying the flux on the turntable 50 and rotating the turntable 50, and the remaining amount of the flux is an appropriate amount. It is possible to automatically perform the operation of replenishing the flux until

  In the present embodiment described above, when performing a maintenance operation such as a flux film thickness adjustment operation or a cleaning operation, the flux transfer device main body 14 is pulled out from the electronic component mounting machine 20 and set at the extraction position. Since manual operation of the main body 14 is possible, maintenance work such as adjustment of the film thickness of the flux film or cleaning work is performed with the flux transfer apparatus main body 14 pulled out to an easily workable position outside the electronic component mounting machine 20. It can be done easily.

  In addition, in the present embodiment, the first safety that prohibits the operation of the flux transfer device main body 14 when the flux transfer device main body 14 is taken in and out between the inner set position and the outer drawing position of the electronic component mounting machine 20. Since the switch 41 is provided, the first safety switch 41 can prevent a situation in which the flux transfer device main body 14 starts to operate unexpectedly due to an operator's operation error when the flux transfer device main body 14 is inserted or removed. , Can improve safety.

  Further, a second safety switch that permits operation of the flux transfer device main body 14 when the mounting base 12 that supports the flux transfer device main body 14 so as to be slidable is mounted on the mounting portion 11 in the electronic component mounting machine 20. 33 is provided, when the mounting state of the mounting base 12 of the flux transfer device main body 14 to the mounting portion 11 in the electronic component mounting machine 20 is incomplete, it is detected by the second safety switch 33 and the flux Operation of the transfer apparatus main body 14 can be prohibited, and safety can be improved.

  Further, since the first lock member 34 for locking the flux transfer device main body 14 at the set position and the pull-out position is provided, the work of setting the flux transfer device main body 14 at the set position and the pull-out position can be performed reliably. At the same time, it is possible to reliably prevent the flux transfer apparatus main body 14 from moving from the set position or the drawing position.

  In addition, since the rotary table 50 and the squeegee 61 are detachably attached to the flux transfer apparatus main body 14, the rotary table 10 and the squeegee 61 are removed from the flux transfer apparatus main body 14 pulled out to the outside of the electronic component mounting machine 20. Thus, cleaning work and maintenance work can be performed, and the workability thereof can be further improved.

  Further, a remaining amount sensor 62 for monitoring the remaining amount of flux on the rotary table 50 is provided, and when it is determined that the remaining amount of flux is insufficient based on the output signal of the remaining amount sensor 62, the flux supply device 65. Since the flux is replenished on the rotary table 50 by operating the rotary table 50, the rotary table is detected each time an insufficient amount of flux on the rotary table 50 is detected during operation of the electronic component mounting machine 20. The flux can be automatically replenished on the surface 50, soldering failure due to insufficient flux can be prevented in advance, and the quality and reliability of soldering can be improved.

  In this case, if the amount of flux scraped off by the squeegee 61 during the rotation of the rotary table 50 becomes too small, the unevenness on the surface of the flux film caused by the immersion of the transfer object such as bumps is leveled to a uniform plane. And the flux cannot be uniformly transferred to the transfer object such as a bump.

  In view of this point, in this embodiment, the remaining amount of flux is monitored by detecting the amount of flux scraped off by the squeegee based on the output signal of the remaining amount sensor 62 while the turntable 50 is rotating. As a result, it is possible to accurately detect a shortage of the remaining amount of flux while the turntable 50 is rotating.

  Further, since the shape of the edge 61a of the squeegee 61 is formed in an arc shape whose center side is curved in the rotation direction of the rotary table 50, when the flux on the rotary table 50 is spread with the squeegee, the flux is squeezed. The curved shape of the edge 61a portion of the squeegee 61 prevents the flow from the center side of the edge 61a of the 61 toward the both end sides, and the flux is locally insufficient at the center side of the squeegee 61. Can be prevented.

  In the present embodiment, the internal pressure of the tank 66 is maintained at a pressure slightly higher than the atmospheric pressure while the flux supply is stopped. Therefore, the residual flux in the discharge nozzle 74 flows back into the tank 66 while the flux supply is stopped. The amount of flux replenishment to the rotary table 50 can be stabilized.

  In this embodiment, the present invention is applied to a rotary type flux transfer device that rotates and squeezes the transfer table (rotary table 50). However, the transfer table is fixed and the squeegee is moved linearly in the horizontal direction. Alternatively, the present invention may be applied to a linear motion type flux transfer apparatus in which the squeegee is fixed and the transfer table is linearly moved in the horizontal direction.

  DESCRIPTION OF SYMBOLS 10 ... Flux transfer apparatus, 12 ... Mounting base, 14 ... Flux transfer apparatus main body, 18 ... Stopper, 19 ... Base plate, 20 ... Electronic component mounting machine 21, 22, ... Connector, 23, 24 ... Engagement pin, 25, 26 , Engagement hole, 27, lock member, 28, spring, 29, lock hole, 31, lock release lever, 33, second safety switch, 34, first lock member (lock means), 35, spring, 36 37 ... Lock hole, 38 ... Lock release handle, 42 ... Photoelectric switch, 43 ... Detection protrusion, 50 ... Rotation table (transfer table), 51 ... Rotary table, 52 ... Magnet, 54 ... Rotation stop pin, 57 ... Motor, 61 ... Squeegee, 61a ... Edge, 61b ... Flux scraping surface, 62 ... Remaining amount sensor (reflection type optical sensor), 62a ... Light projecting element, 62b ... Light receiving 64 ... Height adjusting mechanism, 65 ... Flux supply device (flux supply means), 66 ... Tank, 67 ... Air supply source, 68 ... One-way throttle valve, 69 ... First electromagnetic switching valve (3-port 2-position) Switching valve), 70 ... second electromagnetic switching valve (2-port 2-position switching valve), 71 ... silencer, 74 ... discharge nozzle

Claims (5)

A flux is supplied onto the transfer table, and the flux on the transfer table is uniformly spread by a squeegee disposed above the transfer table to form a flux film, and the transfer object is immersed in the flux film. In a flux transfer device that transfers flux to an object,
A remaining amount sensor for monitoring the remaining amount of flux stored in the transfer table;
The remaining amount sensor is constituted by a reflection type optical sensor that detects reflected light by projecting light from above toward a rising portion of the flux scraped by the squeegee during the squeegeeing operation. Flux transfer device. Flux supply means for supplying flux onto the transfer table;
Control means for operating the flux supply means to replenish the flux on the transfer table when it is determined that the remaining amount of flux is insufficient based on the output signal of the remaining amount sensor. The flux transfer device according to claim 1.   The control means detects a scraping amount of the flux scraped off by the squeegee based on an output signal of the remaining amount sensor during a squeezing operation for forming the flux film, and monitors the remaining amount of flux. The flux transfer device according to claim 1 or 2, characterized in that The transfer table is rotationally driven by a motor,
4. The squeegee according to claim 1, wherein a shape of an edge portion for scraping off the flux is formed in an arc shape in which a central side is curved in a rotation direction of the transfer table. 5. Flux transfer device.   The flux supply means includes a tank for storing flux, and an air supply source for supplying air into the tank and forcing the flux from the discharge nozzle of the tank onto the transfer table by air pressure. The tank internal pressure is maintained at a pressure slightly higher than the atmospheric pressure so that the residual flux in the discharge nozzle does not flow back into the tank. The flux transfer apparatus according to 1.

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