JP2012121042A - Linear solder feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solder feeder capable of attaching/detaching a bobbin to/from a bobbin attaching part quickly, with ease.SOLUTION: In the linear solder feeder, a bobbin 4 on which a linear solder 3 is wound is rotatably attached to a bobbin attaching part 1, to supply the linear solder 3 to a soldering position by delivering it from the bobbin 4. The bobbin attaching part 1 includes three, or first, second, and third support rollers 13, 14, and 15 rotatable with the axial lines parallel to each other as a center. The three support rollers 13, 14, and 15 contact to the outer periphery of the bobbin 4, for supporting the bobbin 4 by three points on the outer periphery.

Description

  The present invention relates to a solder supply apparatus that feeds linear solder wound around a bobbin out of the bobbin and supplies it to a soldering site when various electronic components are soldered to a printed circuit board.

  For example, when an electronic component such as a semiconductor chip is soldered to a printed circuit board with a soldering robot, a solder supply device is used. In this solder supply device, a bobbin around which linear solder is wound is rotatably mounted on a bobbin mounting portion, and the linear solder is drawn out from the bobbin and supplied to a soldering site.

  In a conventional solder supply device, for example, as disclosed in Patent Document 1, the bobbin mounting portion has a bobbin mounting shaft (reel mounting shaft), and the bobbin mounting shaft is fitted into the center hole of the bobbin. The bobbin is rotatably mounted on the bobbin mounting shaft, and a lock screw is screwed onto the tip of the bobbin mounting shaft so that the bobbin does not fall off from the bobbin mounting shaft, and the lock screw is engaged with the bobbin. It was stopped.

  For this reason, each time the bobbin is attached to or detached from the bobbin mounting shaft, the operation of removing the locking screw from the bobbin mounting shaft or reattaching the bobbin must be performed. However, there is a problem that it takes time and effort.

JP-A-5-245627

  An object of the present invention is to provide a solder supply device that can easily and quickly attach and detach a bobbin to and from a bobbin mounting portion.

  In order to achieve the above object, the present invention provides a linear solder supply device in which a bobbin wound with linear solder is rotatably mounted on a bobbin mounting portion, and the linear solder is fed out from the bobbin and supplied to a soldering site. The bobbin mounting portion has first, second, and third support rollers that are rotatable about axes parallel to each other, and the three support rollers contact the outer periphery of the bobbin. The bobbin is configured to be supported at three points on the outer periphery.

  Preferably, in the present invention, of the three support rollers, the first and second support rollers are arranged at fixed positions, and the third support roller is attached to a swing arm, and the swing arm is swung. It is displaceable in the direction of moving toward and away from the outer periphery of the bobbin by movement, and is biased toward the direction of contact with the outer periphery of the bobbin by a swinging spring.

In the present invention, there is an attachment / detachment opening for inserting and removing the bobbin between the first support roller and the third support roller, and the attachment / detachment opening is displaced by the bobbin of the third support roller. It is desirable that the opening width is changed by being changed.
More preferably, the third support roller is displaceable to an initial position when the bobbin is not attached, a relief position during the attachment or removal of the bobbin, and a support position after the bobbin is attached. That is.
In this case, the initial position is determined by the eccentric collar with which the swing arm abuts, and the initial position is determined by adjusting the contact position with respect to the swing arm by rotating the eccentric collar eccentrically by a necessary angle. It can be adjusted according to the diameter of the bobbin.

  The third support roller is disposed so as to be freely displaceable in the axial direction, is urged toward one side in the axial direction by a roller spring, and has a flange-like flange at the end opposite to the urging direction. It is desirable that the bobbin is positioned when the bobbin is mounted by elastically locking the flange portion to the outer edge of the bobbin by the urging force of the roller spring.

  According to the present invention, since the bobbin is supported at three points on the outer periphery by the three support rollers, like the conventional device in which the bobbin mounting shaft is inserted into the center hole of the bobbin and locked with the lock screw, There is no need to remove or reattach the lock screw from the bobbin attachment shaft, and the bobbin can be attached and detached easily and quickly.

It is a front view showing one embodiment of a solder supply device concerning the present invention. It is a side view of FIG. It is a principal part enlarged view of FIG. 1 which shows a motion of the 3rd support roller at the time of attachment or detachment of a bobbin. It is a side view of a bobbin.

  1 and 2 show an embodiment of a solder supply apparatus according to the present invention. This solder supply apparatus is incorporated in, for example, a soldering robot, and electronic components such as semiconductor chips are automatically placed on a printed circuit board. For example, when soldering, linear solder is automatically supplied to each soldering portion.

The solder supply device is roughly divided into a bobbin mounting portion 1 and a solder feeding portion 2. Of these, the bobbin mounting portion 1 is a portion for mounting the bobbin 4 (see FIG. 4) around which the linear solder 3 is wound.
The solder feeding section 2 is a portion for feeding out the linear solder 3 from the bobbin 4 mounted on the bobbin mounting section 1 by a necessary length, and feeding the fed-out linear solder 3 toward the soldering portion. Yes, the linear solder 3 is sent out along the linear transfer path 5 downward in FIGS. 1 and 2. Therefore, if the direction in which the linear solder 3 is fed out is the front, the solder feeding part 2 is located on the front side of the solder supply device, and the bobbin mounting part 1 is located on the rear side of the solder supply device. It will be.

  The bobbin 4 is made of a non-metallic material such as synthetic resin. As shown in FIG. 4, the bobbin 4 has a cylindrical core 8 and annular ends attached to both ends of the core 8 in the axial direction. It consists of a plate 9, and the linear solder 3 is wound around the outer periphery of the core 8 in a spiral and multiple manner. Reference numeral 8a in FIG. 4 is a center hole penetrating the center of the core 8 in the axial direction.

  The bobbin mounting portion 1 is fixed to two shaft rods 10 extending parallel to each other from the housing 40 of the solder feeding portion 2 and toward the rear side of the solder supply device, and to the front end of the shaft rod 10 in the extending direction. A roller mounting plate 11 attached to the roller mounting plate 11, a swinging arm 12 swingably connected to the roller mounting plate 11, a first support roller 13 and a second support roller 13 rotatably attached to the roller mounting plate 11. A support roller 14, a third support roller 15 rotatably attached to the swing arm 12, and the swing arm 12 between the third support roller 15 and the first support roller 13. And an oscillating spring 16 that biases in the direction in which the distance between the two is reduced.

  A space between the first support roller 13 and the third support roller 15 is used as an attachment / detachment port 17 for mounting and removing the bobbin 4, and the bobbin 4 is assigned to the attachment / detachment port 17, and the first The three support rollers 15 are pushed and moved in the direction in which the opening width H of the attachment / detachment opening 17 is expanded, and the bobbin 4 is pushed between the three support rollers 13, 14, 15, whereby the three support rollers 13, 14, 15 is in contact with the outer periphery of the bobbin 4, and the bobbin 4 is configured to be supported by these three support rollers 13, 14, 15 at three points on the outer periphery. Hereinafter, the configuration will be described in detail.

  The roller mounting plate 11 is stretched between the front end portions of the two shaft rods 10, and both ends of the roller mounting plate 11 in the length direction, that is, the end portion on one shaft rod 10 side and the other shaft. A columnar first roller shaft 18 and a second roller shaft 19 (see FIG. 3) are oriented at right angles to the transfer path 5 and parallel to each other at the end on the rod 10 side. The first support roller 13 is fixed to the first roller shaft 18 in a cantilever shape in a posture, and is rotatably attached to the first roller shaft 18, and the cylindrical first support roller 13 is attached to the second roller shaft 19. Two support rollers 14 are rotatably mounted. Therefore, the first support roller 13 and the second support roller 14 are rotatable around axes parallel to each other at a fixed position.

  The first support roller 13 and the second support roller 14 are made of synthetic resin and have a smooth outer peripheral surface, and the outer peripheral surface comes into contact with the outer periphery of the end plate 9 of the bobbin 4. The bobbin 4 is supported. Flange-shaped flanges 13 a and 14 a are formed at both axial ends of the first and second support rollers 13 and 14, and one or both of the flanges 13 a and 14 a are formed on the end plate 9 of the bobbin 4. By engaging with the outer edge portion, positioning when the bobbin 4 is mounted is performed.

  A lock screw 21 is detachably screwed to the free ends of the first and second roller shafts 18 and 19, and the lock screw 21 is engaged with the ends of the support rollers 13 and 14. This prevents the support rollers 13 and 14 from coming out of the roller shafts 18 and 19. The support rollers 13 and 14 can be exchanged by removing the lock screw 21 from the roller shafts 18 and 19.

  An extension portion 11a extending toward the rear side of the solder supply device is provided at a position near the end of the roller mounting plate 11 on the side on which the second support roller 14 is attached. A base end portion of the swing arm 12 having a dogleg shape on a side surface is swingable about an axis parallel to the axes of the first and second support rollers 13 and 14 by a swing shaft 24. So that they are connected. A third roller shaft 20 having a cylindrical shape is formed at the tip which is the free end of the swing arm 12 so as to be parallel to the first and second roller shafts 18 and 19 in a cantilever shape. The third support roller 15 having a cylindrical shape is rotatably attached to the third roller shaft 20. Accordingly, the third support roller 15 is rotatable about an axis parallel to the axes of the first and second support rollers 13 and 14, and the bobbin 4 is centered on the swing shaft 24. It can swing freely in the direction of contact with and away from the outer periphery.

  The third support roller 15 is made of synthetic resin, and is attached to the third roller shaft 20 so as to be displaceable by a distance X in the axial direction, and the third roller 15 is pulled by a tensile force of a coiled roller spring 25. The roller shaft 20 is biased toward the base end side, that is, the swing arm 12 side. The roller spring 25 is disposed so as to surround the outer periphery of the third roller shaft 20, and one end is engaged with a spring receiver 26 on the side surface of the swing arm 12, and the other end is the third support roller. 15 is fitted in the spring accommodating hole 15b inside and is locked to the support roller 15.

The third support roller 15 has a smooth outer peripheral surface that comes into contact with the outer periphery of the end plate 9 of the bobbin 4, and the end of the support roller 15, that is, the end portion on the side far from the swing arm 12. Is formed with a flange-like flange portion 15a, and the flange portion 15a is elastically locked to the outer edge portion of one end plate 9 of the bobbin 4 by the urging force of the roller spring 25, whereby the bobbin 4 The other end plate 9 of the first and second support rollers 13 and 14 abuts against the flanges 13a and 14a on the base end side of the first and second support rollers 13 and 14, whereby the bobbin 4 is connected to the three support rollers 13 and 14 and 14a. It is supported in a state of being positioned between 15.
A locking plate 27 is detachably attached to the front end, which is a free end of the third roller shaft 20, by a screw 28, and the locking plate 27 causes the third support roller 15 to move to the third end. The roller shaft 20 is prevented from coming off.

  The swing arm 12 is attached in a direction in which the third support roller 15 is pressed against the outer periphery of the bobbin 4 by the coil-shaped swing spring 16, that is, in a direction in which the opening width H of the attachment / detachment port 17 is narrowed. It is energized. One end of the swinging spring 16 is locked to the spring receiver 31 of the swinging arm 12, and the other end is locked to the spring receiver 32 of the roller mounting plate 11.

  Accordingly, the third support roller 15 is in an initial state when the bobbin 4 is not mounted on the bobbin mounting portion 1 when the bobbin 4 is mounted and taken out, as shown by a two-dot chain line together with the bobbin 4 in FIG. As shown by the dotted line together with the bobbin 4 in the figure, the position A and the escape position B in the middle of the bobbin 4 being attached to the bobbin attaching part 1 or being taken out from the bobbin attaching part 1, and the bobbin 4 in the figure In addition, as shown by a solid line, the bobbin 4 can be displaced to the support position C after the bobbin mounting portion 1 is mounted. In this case, in the step where the bobbin 4 is mounted on the bobbin mounting portion 1, the third support roller 15 occupies the support position C through the escape position B from the initial position A, and the bobbin 4 is mounted on the bobbin. In the step of taking out from the part 1, the initial position A is finally occupied from the support position C through the escape position B.

  The initial position A is set by the eccentric collar 35. In other words, the ring-shaped eccentric collar 35 is attached to the side surface of the roller mounting plate 11 adjacent to the swing arm 12 so that the eccentric direction can be adjusted by eccentric rotation about the screw 36. The initial position A is set by the swing arm 12 coming into contact with the outer periphery of the eccentric collar 35. When the third support roller 15 is at the initial position A, the opening width H of the attachment / detachment port 17, that is, the distance between the third support roller 15 and the first support roller 13 is determined by the end plate of the bobbin 4. It is smaller than the diameter D of 9 and the smallest of the three positions. In this initial position A, the opening width H of the attachment / detachment opening 17 is set to a size suitable for pushing the bobbin 4, and the eccentric collar 35 is rotated by a required angle to change its eccentric direction. The size of the bobbin 4 can be changed to a size that can be easily pushed in accordance with the diameter D (the diameter of the end plate 9) D.

  The escape position B is a position of the third support roller 15 while the bobbin 4 is being pushed into the mounting position through the attachment / detachment opening 17 or being taken out of the mounting position, and is not necessarily fixed as the initial position A. Not a position. When the third support roller 15 is in the escape position B, the opening width H of the attachment / detachment port 17 is the largest among the three positions, and the opening width H is equal to or greater than the diameter of the bobbin 4. In the example of FIG. 3, the bobbin 4 is mounted in a state where it is pressed against both the first support roller 13 and the third support roller 15, and the opening width H of the attachment / detachment opening 17 is the diameter D of the bobbin 4. And the escape position B when it becomes just equal. When the bobbin 4 is mounted in a state where it is pressed against only the third support roller 15 without being brought into contact with the first support roller 13, the third support roller 15 is larger than the position of FIG. Due to the displacement, the opening width H of the attachment / detachment port 17 is larger than the diameter D of the bobbin 4.

  The support position C is a position where the third support roller 15 contacts the outer periphery of the bobbin 4, and the bobbin 4 is supported at three points on the outer periphery by the three support rollers 13, 14, 15 at the support position C, It becomes a wearing state. At this time, the opening width H of the attachment / detachment opening 17 is smaller than the diameter D of the bobbin 4, and the bobbin 4 is pressed against the first support roller 13 and the second support roller 14 by the third support roller 15. Therefore, the bobbin 4 does not come out of the mounting position through the attachment / detachment opening 17 and is reliably and stably supported between the three support rollers 13, 14, 15.

  Since the bobbin mounting portion 1 is configured as described above, the bobbin 4 is pushed into the mounting position between the three support rollers 13, 14, 15 from the mounting / demounting port 17, or is taken out from the mounting position through the mounting / detaching port 17. The bobbin 4 can be attached and detached easily and quickly with one hand.

  On the other hand, the solder feeding part 2 is soldered so as to be positioned on the base plate 41 attached to one surface of the housing 40 (the right side surface in FIG. 2) on the inlet side and the outlet side of the transfer path 5. An introduction member 42 and a solder lead-out member 43 are provided, and a tapered inlet nozzle 44 having a center hole leading to the center hole of the solder lead-in member 42 and a center hole leading to the center hole of the solder lead-out member 43 are provided. A tapered outlet nozzle 45 provided is disposed along the transfer path 5 with the tapered ends facing each other. Then, the linear solder 3 fed out from the bobbin 4 is introduced from the solder introduction member 42 to the inlet nozzle 44, and sent out from the outlet nozzle 45 through the solder outlet member 43 toward the soldering portion.

In a space between the inlet nozzle 44 and the outlet nozzle 45, a groove cutting roller 48 and a guide roller 49 are orthogonal to the transfer path 5 and parallel to each other at positions facing each other across the transfer path 5. It is rotatably arranged around the axis.
The grooving roller 48 has a function of cutting a groove in the side surface of the linear solder 3 whose center is filled with flux, and the tip of the solder iron in accordance with the timing of soldering the linear solder 3. And has a function of moving forward and backward by a necessary amount, and is connected to an electric motor (not shown) inside the housing 40 and driven to rotate in forward and reverse directions. The electric motor is a stepping motor.

Therefore, the grooving roller 48 has a ring-shaped grooving blade 50 having a sharply sharpened blade edge continuously on the entire circumference, and a number of intermittently formed gear teeth. A ring-shaped feed blade 51 having a claw on the outer periphery is disposed so as to overlap in the axial direction of the grooving roller 48, and the feed blade 51 bites into the side surface of the linear solder 3, thereby The groove cutting blade 50 is continuously cut into a groove reaching the flux filling region on the side surface of the linear solder 3 when the linear solder 3 moves forward by moving forward or backward by a necessary amount. In the illustrated example, the grooving blade 50 is disposed on the proximal end side (left side in FIG. 2) of the grooving roller 48, and the feed blade 51 is disposed on the distal end side (right side in FIG. 2) of the grooving roller 48. It is installed.
When the groove is cut in the linear solder 3 in this way, even if the flux is heated by the solder iron during soldering and rapidly vaporizes, the flux evaporates from the groove, so that no explosion phenomenon occurs.

  On the other hand, the guide roller 49 has a V-shaped guide groove 52 on the outer periphery of which the linear solder 3 is fitted, and when the linear solder 3 is advanced and retracted by the grooving roller 48, the linear solder 3 Following and following and rotating in the forward and reverse directions.

DESCRIPTION OF SYMBOLS 1 Bobbin mounting part 3 Linear solder 4 Bobbin 12 Oscillating arm 13 1st support roller 14 2nd support roller 15 3rd support roller 15a collar part 16 Oscillating spring 17 Detachment port 25 Roller spring 35 Eccentric collar A Initial Position B Escape position C Support position D Diameter H Opening width

Claims (6)

In the linear solder supply device, the bobbin around which the linear solder is wound is rotatably mounted on the bobbin mounting portion, and the linear solder is drawn out from the bobbin and is supplied to the soldering portion.
The bobbin mounting portion includes first, second, and third support rollers that are rotatable about axes parallel to each other, and the three support rollers come into contact with the outer periphery of the bobbin and the bobbin It is comprised so that it may be supported by 3 points | pieces of outer periphery, The linear solder supply apparatus characterized by the above-mentioned.   Of the three support rollers, the first and second support rollers are disposed at fixed positions, and the third support roller is attached to the swing arm, and the swing arm swings around the outer periphery of the bobbin. 2. The linear solder supply device according to claim 1, wherein the linear solder supply device is displaceable in a contacting / separating direction and is urged by a swinging spring toward a direction contacting the outer periphery of the bobbin.   An attachment / detachment opening for inserting and removing the bobbin is provided between the first support roller and the third support roller, and the attachment / detachment opening has an opening width when the third support roller is displaced by the bobbin. The linear solder supply device according to claim 1, wherein the linear solder supply device changes.   The third support roller is displaceable to an initial position when the bobbin is not mounted, an escape position while the bobbin is mounted or taken out, and a support position after the bobbin is mounted. The linear solder supply device according to claim 2 or 3.   The initial position is determined by an eccentric collar with which the swing arm abuts, and by adjusting the contact position with respect to the swing arm by eccentrically rotating the eccentric collar by a necessary angle, the initial position becomes the diameter of the bobbin. The linear solder supply device according to claim 4, wherein the linear solder supply device can be adjusted according to the condition.   The third support roller is disposed so as to be freely displaceable in the axial direction, is urged toward one side in the axial direction by a roller spring, and has a flange-shaped flange on the end opposite to the urging direction. 6. The positioning of the bobbin is performed by the hook portion being elastically locked to the outer edge portion of the bobbin by the biasing force of the roller spring. 6. The linear solder supply device according to 1.

Images