JPS6049072B2 - soldering equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a soldering device.

Conventionally, electronic components, etc. are attached to an object to be soldered, such as a printed wiring board, and the object to be soldered is held by the holding claws of a holder, which is necessary for soldering in which the objects are sequentially arranged along the conveyor of this holder. It is common to automatically perform soldering by moving over each device part.

However, despite the wide variety of shapes and dimensions of printed wiring boards as objects to be soldered, conventionally the task of adjusting the spacing between the holding claws of the holder to the shape and dimensions of the board has been done entirely manually. There was a risk that the inefficiency of this manual work would make the high-speed workability of the automatic soldering process useless.

In particular, the larger the number of holders, the more difficult it becomes because all the holders must be set to the required substrate dimensions. The present invention has been made in view of these points, and an object thereof is to provide a soldering device that can efficiently open and close the holding claws of a holder that conveys objects to be soldered.

Next, one embodiment of the present invention will be described based on FIGS. 1 to 7.

As shown in FIG. 1, an endless conveyor 3 is formed by a pair of endless inner and outer conveyor rails 1 and a conveyor chain 2 disposed along the inner conveyor rails 1.

Along this conveyor 3, there is a soldering object intake section 4, a flux application section 5, a preheating section 6, a soldering section 7, a cooling section 8, a soldering object removal section 9, and a soldering object holding claw opening/closing. Adjustment parts 11 are arranged one after another. In addition, a part of the endless conveyor 3, that is, the take-out section 9
A free flow conveyor 13 consisting of a pair of endless chains 12 is installed in a straight line from the intake section 4 to the intake section 4, and a vertically movable rod 14, a fixed guide rod 15, and a vertically movable rod 16 are arranged along one side of the conveyor 13. In addition, a positioning mechanism section 17 is provided on the other side.

In addition, the above-mentioned conveyor 3 or free flow conveyor 1
3, the holder 18 for holding and conveying an object to be soldered, such as a printed wiring board, is forcibly moved by a conveyor pin 19 protruding from the conveyor chain 2 of the conveyor 3, or by a free flow conveyor 13. The transfer is made so that it can be locked by the upper surface of the endless chain 12.

As shown in FIGS. 2 and 3, this holder 18 rotatably supports rollers 22 that roll on the conveyance rail 1 on both sides of a square frame holder main body 21. An inverted V-shaped groove (not shown) of a positioning body that rotatably supports a roller 23 for preventing lateral wobbling, and is moved up and down by an air cylinder (not shown) of the positioning mechanism section 17.
A positioning pin 24 is provided to protrude upward and is fitted into the holder body 21 for positioning.
5 is fixed, and a hinge 26 with a spring is attached to the upper end of this mounting plate 25.
Attach the transport fitting 27 via the
The conveyor pins 19 of the conveyor 3 are inserted into the respective holes 28 .

By pushing up the vertical movable rod 14 to the height of the fixed guide rod 15 using an air cylinder (not shown), the conveying pin 19 and the hole 28 are disengaged, and the holder main body 2 is removed.
1 is released from the forced transfer force of the conveyor chain 2 and is slidably placed on the endless chain 12 of the free flow conveyor 13. 29 is a support frame.

Further, an elongated long hole 31 is bored on one side of the front and rear frames of the holder main body 21, and both ends of one mounting frame 32 are bridged over the long holes 31 of the front and rear frames. An insertion hole 33 is drilled in the part corresponding to the elongated hole 31, and a screw 34 is inserted into the elongated hole 31 and the insertion hole 33 from below the elongated hole 31, and at this time, the male thread is inserted into the elongated hole 31 and the insertion hole 33 from below. After locking the locking portion 35 of 34 in the stepped portion 36 inside the elongated hole 31 and inserting the washer 37, coil spring 38, and washer 39 into the upper end protrusion of this male screw 34, the butterfly-shaped female screw 4
Screw 1 together.

Both ends of the mounting frame 32 are used as movable engaging parts 42, and the wing parts of the butterfly-shaped female screw 41 are used as rotary engaging parts 4.
3. Further, both ends of the other mounting frame 51 are bridged over the other side of the front and rear frame portions of the holder main body 21, and this mounting frame 5
Both ends of 1 are fixed to the holder main body 21 with screws 52.

Then, the holding claws 53 are fixed to the inner surface of one of the mounting frames 32, and the holding claws 53 are attached to the opposing inner surface of the other mounting frame 51 via the spring-loaded hinges 54. Holds an object to be soldered, such as the above-mentioned printed wiring board. The spring of the hinge 54 urges the holding claw 53 in the closing direction, and when opening the holding claw 53, an operating piece 55 projecting upward from the center of the holding claw 53 is pushed inward. Further, in the soldering object holding claw opening/closing adjusting section 11, as shown in FIGS. 4 to 7, one mounting frame 32 of the holder 18 is movably adjustable above the holder 18. A horizontal guide 61 consisting of two round rods is fixedly installed via a mounting plate 60 in the same direction as the elongated hole 31, and the center portion of the horizontal moving body 62 is fitted into this horizontal guide 61 so as to be able to move forward and backward. In addition, a screw 64 of a drive unit for advancing and retracting this horizontal moving body 62 is screwed into a nut 63 at the base of this horizontal moving body 62, and a drive motor 65 such as a pulse motor or a brake motor is connected to the base end of this screw 64. Combine the drive shafts.

Further, four vertical guides 71 are provided on each side of the horizontal moving body 62, and a slide shaft 73 of the vertical moving body 72 is fitted into the vertical guides 71 so as to be vertically movable. The main body of an air cylinder 74 serving as a drive unit for vertically moving the vertically movable body 72 is fixed to the vertically movable body 72, and the lower end of the piston rod 75 of the air cylinder 74 is connected to the upper surface of the vertically movable body 72.

Further, an L-shaped mover 77 is fixed to the lower side portions 76 of the vertically moving body 72 on both sides, and a shaft 79 of a rotor 78 is rotatably provided via a bearing 81 and a holder 82.

A concave groove 83 is provided at the distal end of the mover 77 to engage with the movable engagement portion 42 of the mounting frame 32, and the rotor 78
is provided with a concave groove 84 into which the main body of the butterfly-shaped female screw 41 is inserted from the lower surface, and a vertical groove 85 which engages with the rotational engagement portion 43 of the screw 41. Also, the upper end of the shaft 79 of the rotor 78 A large gear 88 is formed on the output shaft of a rotation source 87 such as a motor or rotary actuator, which serves as a drive unit for forward and reverse rotation of the rotor 78.
mesh together. Next, the action will be explained.

The conveyance fitting 27 of the holder 18 is fitted into the conveyance pin 19 protruding from the conveyance chain 2 of the conveyor 3, and while forcibly conveying the holder 18, the holder 18 is moved up and down, or The soldering process is carried out on the lower surface of the object to be soldered by moving the flux tank and solder tank below 18 up and down, or by foaming the flux in these liquid tanks or spouting out the melted solder.

When the holder 18 is transported to the soldering object removal section 9, the vertically movable rod 14 is fixed to the guide rod 15.
The conveying metal fitting 27 is removed from the conveying pin 19 by the vertical movement lever 14, and at the same time, the holder 18 is placed on the free flow conveyor 13, and the holder 18 is kept fixed despite the driving of the conveyor 13. The object to be soldered is removed from the holding claw 53 of the holder 18 by locking it in position, and the object to be soldered is taken out.

Furthermore, the holder 18 is transferred by the free flow conveyor 13 to the soldering object holding claw opening/closing adjustment section 11, and at this position, the positioning pin 24 of the holder 18 is fixed at a fixed position by the positioning mechanism section 17, and the holder 18 is to stop. At this time, the endless chain 12 of the free flow conveyor 13 is sliding on the lower side of the holder body 21. In this state, when it is necessary to adjust the interval between the holding claws 53 on both sides of the holder 18, the waiting vertical movable bodies 72 on both sides are lowered using the air cylinders 74, and the concave grooves of the movers 77 on both sides are lowered. 83 are engaged with the movable engagement portions 42 at both ends of the mounting frame 32, and at the same time, the vertical grooves 85 of the rotors 78 on both sides are engaged with the rotation engagement portions 43 of the butterfly-shaped female screw 41.

Then, by driving the rotation sources 87 on both sides, the rotor 78 rotates the female thread 41 in a direction to loosen it, and the rotation sources 87
is stopped, and further the screw 64 is rotated by the drive motor 65, so that the horizontal moving body 62 and the movable element 77 and rotor 78 at the lower part thereof are integrally moved horizontally,
The mounting frame 32 is moved and adjusted along the elongated hole 31, and the motor 65 is stopped at a predetermined position. Here motor 6
The rotation speed and rotation direction of the mounting frame 32 are controlled by a control unit that stores command information in advance according to the moving distance and moving direction of the mounting frame 32. Furthermore, the rotor 78 is rotated in the opposite direction to the mounting frame 32 that is stopped at the fixed position, and the butterfly-shaped female screw 41 is connected to the coil spring 3.
It rotates in the direction of tightening against the repulsive force of 8.

Thereafter, the piston rod 75 of the air cylinder 74 is raised to release the engagement between the mover 77 and the mounting frame 32 and the engagement between the rotor 78 and the female butterfly screw 41. Then, the positioning pin 24 is released from the positioning pin 24 by the positioning machine groove 17, and the holder 18 is transferred along the fixed guide rod 15 by the free flow conveyor 13, and the holder 18 is locked and held by the intake part 4. The claw 53 holds an object to be soldered such as a printed wiring board, and the vertically moving rod 1
At position 6, lower the vertically movable rod 16 from the level of the fixed guide rod 15, and move the transport fitting 27 of the holder 18 onto the transport pin 1.
9, and the holder 18 is forcibly transferred by the conveyor 3.

In this embodiment, two types of conveyors are provided, the conveyor 3 and the free meat raw conveyor 13, but as shown in FIG. 8, the conveyor chain 2 of the conveyor 3 is intermittently In the case of a duct type that moves and stops, the holder 18 can be stopped for a predetermined time at the positions of the takeout section 9, the adjustment section 11, and the intake section 4 by the conveyor 3 itself, so the free flow conveyor 13 becomes unnecessary.

At the same time, the vertical movable rods 14 and 16 and the fixed guide rod 1
5 is no longer necessary, and it is also no longer necessary to attach the conveying metal fitting 27 of the holder 18 with the spring-loaded hinge 26, and it is sufficient to directly fix this metal fitting 27 to the holder main body 21. Further, the male thread 34 and the female thread 41 may be replaced and reversed, and in that case, the rotational engagement portion 43 is provided on the male thread 34. For example, the head of a hexagonal bolt as a male thread is used as the rotational engagement portion, and the concave groove 8 of the rotor 78 is
For example, 4 may have a hexagonal cross section. In addition, as a modification thereof, the insertion hole 33 and the elongated hole 31
Alternatively, a bolt may be inserted from above and the hexagonal convex portion of the rotor 78 may be fitted into a hexagonal groove in the head of the bolt. Further, the coil spring 38 serves to buffer the butterfly-shaped female screw 41 from excessive tightening, but instead of the coil spring 38, a dowel limiter or the like may be interposed on the drive side of the rotor 78. , similar effects can be obtained.

Furthermore, although the mounting frame 51 is fixed and cannot be adjusted in movement, this mounting frame 51 also
Similarly to 2, it may be possible to adjust the movement along the elongated hole 31, in which case the soldering object holding claw opening/closing adjustment part 1
1, two sets of the ones shown in FIG.
It is necessary to act twice on 1.

As described above, according to the present invention, the soldering object holding claw opening/closing adjustment unit includes a mover that moves and adjusts the mounting frame of the holding claw of the holder, and a rotor that rotates the fixing screw of the mounting frame in forward and reverse directions. Since it is integrated into the automatic soldering line, the movement of the holding claw mounting frame can be adjusted at a speed that matches the speed of the line, speeding up the overall soldering process. be able to.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the soldering device of the present invention, Fig. 2 is a perspective view of the holder, Fig. 3 is a sectional view of a part of the holder, and Fig. 4 is a holding claw opening and closing. FIG. 5 is a plan view of the adjustment section, FIG. 6 is a sectional view of the main part thereof, FIG. 7 is a sectional view taken along the line ■-■ of FIG. 6, and FIG. 8 is a view of the present invention. FIG. 3 is a plan view showing another embodiment of the invention. 3...Transportation conveyor, 4...Soldering object intake section, 5...Flux application section, 6.
...Preheating section, 7... Soldering section, 9
・・・・・・Solder attachment extraction part, 11・・・・・・
Soldered object holding claw opening/closing adjustment part, 18...Holder, 21...Holder body, 32...Mounting frame, 41...Screw, 53...・Holding claw, 7
7...Mover, 78...Rotor.

Claims (1)

[Claims] 1. A soldering object intake section, a flux application section, a preheating section, a soldering section, a soldering object removal section, and a soldering object holding claw opening/closing adjustment section are sequentially arranged along an endless conveyor, The soldering object holding claw opening/closing adjustment section includes a mover that engages with the mounting frame of the holding claw of the holder that holds and conveys the soldering object and adjusts the movement of the mounting frame relative to the holder body; A soldering device comprising: a rotor that engages with a screw fixed to the holder body and rotates the screw in forward and reverse directions.