JPS6218257B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an opening/closing adjustment device for holding claws for soldering objects.

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, although the shape and dimensions of the printed wiring board as the object to be soldered vary widely, it is difficult to adjust the spacing between the holding claws of the holder to the shape and dimensions of the board.
Conventionally, everything has been done manually, and the inefficiency of this manual process has the risk of making 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 was made in view of these points,
The purpose is to enable efficient opening/closing adjustment of the holding claws of a holder for conveying 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 that opens and closes. The adjustment parts 11 are arranged one after another.

In addition, a free flow conveyor 13 consisting of a pair of endless chains 12 is provided in a part of the endless conveyor 3, that is, from the take-out section 9 to the intake section 4, and is configured to move up and down along one side of the conveyor 13. A rod 14, a fixed guide rod 15, and a vertically movable rod 16 are provided, and a positioning mechanism section 17 is provided on the other side.

Further, a holder 18 for holding and conveying an object to be soldered such as a printed wiring board by the conveyor 3 or the free flow conveyor 13 is provided protruding from the conveyance chain 2 of the conveyor 3 and is attached to a conveyor pin 19. The free flow conveyor 13 is configured to move either forcibly or lockably by the upper surface of the endless chain 12 of the free flow conveyor 13.

As shown in FIGS. 2 and 3, this holder 18 has a rectangular frame holder body 21 on both sides.
A roller 23 rotatably supports the roller 22 rolling on the conveyance rail 1, and also prevents sideways wobbling.
is rotatably supported, and the positioning mechanism section 1
A positioning pin 24 that is positioned by fitting into an inverted V-shaped groove (not shown) of a positioning body (not shown) that is moved up and down by an air cylinder (not shown) of 7 is provided to protrude upward, and this holder body A mounting plate 25 is fixed to the inner side of the mounting plate 21, and a transport fitting 27 is attached to the upper end of the mounting plate 25 via a spring-loaded hinge 26.
The conveyor pins 19 of the conveyor 3 are inserted into the two holes 28 of the conveyor fitting 27. 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 pins 19 and the holes 28 are disengaged, and the holder main body 21 is forced into the conveying chain 2. It is released from the transfer force 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 frame portions of the holder main body 21.
Both ends of one of the mounting frames 23 are placed above the mounting frame 32, and insertion holes 33 are bored in both ends of the mounting frame 32 at portions corresponding to the elongated holes 31.
Insert the screw 34 into the insertion hole 33 from below the elongated hole 31, and at this time, the locking portion 3 of the male screw 34
5 is locked in the stepped portion 36 inside the elongated hole 31, and after inserting the washer 37, coil spring 38, and washer 39 into the upper end protrusion of the male screw 34, the butterfly-shaped female screw 41 is screwed together. And the above mounting frame 3
2 are used as movable engaging parts 42, and the wings of the butterfly-shaped female screw 41 are used as rotary engaging parts 43.

Further, both ends of the other mounting frame 51 are spanned over the other side of the front and rear frame portions of the holder main body 21, and both ends of this mounting frame 51 are fixed to the holder main body 21 with screws 52. Then, the holding claw 53 is fixed to the inner surface of one of the mounting frames 32, and the other mounting frame 51 is fixed to the inner surface of the mounting frame 32.
Holding claws 53 are attached to the opposing inner surfaces of the holding claws 53 via spring-loaded hinges 54, and both holding claws 53 hold an object to be soldered, such as the printed wiring board. Note that the spring of the hinge 54 is the retaining claw 53.
When the holding claw 53 is opened, an operating piece 55 projecting upward from the center of the holding claw 53 is pushed inward.

In addition, the soldering object holding claw opening/closing adjustment section 11
Now, as shown in FIGS. 4 to 7, one mounting frame 32 of the holder 18 is located above the holder 18 in the same direction as the elongated hole 31 whose movement can be adjusted. A horizontal guide 61 consisting of two round bars is fixedly installed via a mounting frame 60,
A horizontal movable body 62 is fitted into the horizontal guide 61 so that its central portion can move forward and backward, and a screw 64 of a drive unit for moving the horizontal movable body 62 forward and backward is screwed into a nut 63 at the base of the horizontal movable body 62. A drive shaft of a drive motor 65 such as a pulse motor or a brake motor is coupled to the base end of this screw 64.

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 driving unit for vertically moving the vertically movable body 72 is fixed to the
The lower ends of the four piston rods 75 are connected to the upper surface of the vertical moving 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. The distal end of the mover 77 is provided with a concave groove 83 that engages with the movable engagement portion 42 of the mounting frame 32, and the rotor 78 has a concave groove into which the main body of the butterfly-shaped female screw 41 is inserted from the lower surface. A vertical groove 8 that engages with the groove 84 and the rotational engagement portion 43 of the screw 41
5 and 5 respectively. Further, a pinion 86 is formed at the upper end of the shaft 79 of the rotor 78, and the pinion 86 is the output shaft of a rotation source 87 such as a motor or rotary actuator as a drive unit for forward and reverse rotation of the rotor 78. The large gears 88 of are meshed together.

Next, the effect will be explained.

The conveyance metal fitting 27 of the holder 18 is attached to the conveyance pin 19 protruding from the conveyance chain 2 of the conveyor 3.
while forcibly transferring the holder 18.
This holder 18 can be moved up and down, or the holder 1
Soldering is carried out on the lower surface of the object to be soldered by moving the flux tank and solder tank below 8 up and down, or by foaming the flux in these liquid tanks or spouting out melted solder.

When the holder 18 is transported to the soldering object removal section 9, the vertically movable rod 14 is driven upward to the level of the fixed guide rod 15, and the transport fitting 27 is transported by the vertically movable rod 14. Remove the soldering object from the holding claw 53 of the holder 18 by removing it from the pin 19, placing the holder 18 on the free flow conveyor 13, and locking the holder 18 in a fixed position despite the drive of the conveyor 13. Remove the soldered object and take it outside.

Further, the holder 18 is transferred to the soldering object holding claw opening/closing adjustment section 11 by the free flow conveyor 13, and at this position, the positioning mechanism section 17
The positioning pin 24 of the holder 18 is fixed at a fixed position, and the holder 18 is stopped. 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 screw 41 in a direction to loosen it,
The rotation source 87 is stopped, and the screw 64 is further rotated by the drive motor 65 to horizontally move the horizontal moving body 62 and the movable element 77 and rotor 78 at the lower part thereof integrally, and the mounting frame 3
2 along the elongated hole 31, and the motor 65 is stopped at a predetermined position. Here motor 65
The rotation speed and rotation direction of the mounting frame 32 are controlled by a control unit in which command information is stored in advance in accordance with 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 rotated in a direction that tightens it against the repulsive force of the coil spring 38. do. after that,
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 unfixed by the positioning mechanism 17, the holder 18 is transferred along the fixed guide rod 15 by the free flow conveyor 13, and the holder 18 is locked at the intake part 4, and its holding claw 53 to hold an object to be soldered, such as a printed wiring board, and then lower the vertically movable lever 16 from the level of the fixed guide member 15 at the position of the vertically movable lever 16, and move the conveyor fitting 27 of the holder 18 onto the conveyor pin 19. The holders 18 are fitted together, and the holders 18 are forcibly transferred by the conveyor 3.

In this embodiment, two types of conveyors, the conveyor 3 and the free flow conveyor 13, are provided, but as shown in FIG. 8, the conveyor chain 2 of the conveyor 3 moves intermittently at regular intervals. In the case of a tact type that performs and stops, the holder 18
By the conveyor 3 itself, the take-out section 9,
Since it can be stopped at the positions of the adjustment section 11 and the intake section 4 for a predetermined period of time, the free flow conveyor 13 becomes unnecessary. At the same time, the vertically movable rods 14, 16 and the fixed guide rod 15 are no longer necessary.
Furthermore, it is no longer necessary to attach the conveying metal fitting 27 of the holder 18 with the spring-loaded hinge 26, and this metal fitting 2
7 may be directly fixed 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 male-threaded hexagonal bolt may be used as the rotational engagement portion, and the groove 84 of the rotor 78 may have a hexagonal cross section. As a modification thereof, a bolt may be inserted into the insertion hole 33 and the elongated hole 31 from above, and the hexagonal convex portion of the rotor 78 may be fitted into the hexagonal groove of the head of the bolt.

Further, the coil spring 38 serves to buffer the butterfly-shaped female screw 41 from excessive tightening.
Instead of this coil spring 38, the rotor 78
A torque limiter or the like may be interposed on the drive side of the motor, and similar effects can be obtained.

Further, although the mounting frame 51 is fixed and cannot be adjusted in movement, the mounting frame 51 may also be configured to be adjustable in movement along the elongated hole 31 in the same way as the mounting frame 32. In that case, in the soldering object holding claw opening/closing adjustment section 11, two sets of the claws shown in FIG. It is necessary to act twice.

As described above, according to the present invention, a horizontal moving body guided by a horizontal guide, a vertical moving body guided by a vertical guide of the horizontal moving body, and a driving section for each of the moving bodies are provided. , the vertical moving body is provided with a mover that engages with the mounting frame of the holding claw of the holder and a rotor that engages with the fixing screw of the mounting frame;
Since we provided a drive unit that rotates this rotor in the forward and reverse directions, the above-mentioned slider and rotor are lowered to the corresponding parts and engaged, the screws of the above-mentioned mounting frame are loosened, this mounting frame is moved and adjusted, and then the above-mentioned screws are adjusted. The series of operations of tightening the mounting frame, lifting the slider and rotor, and releasing them from the engaged portion can be performed mechanically and efficiently, and it does not take much time to adjust the opening and closing of the holding claws of the holder.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the soldering device related to the holding claw opening/closing adjustment 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. Fig. 4 is a partially cutaway front view showing one embodiment of the holding claw opening/closing adjustment device, Fig. 5 is a plan view thereof, Fig. 6 is a sectional view of the main part thereof, and Fig. 7 is a
8 is a plan view showing another embodiment of the soldering apparatus according to the present invention. 18...Holder, 32...Mounting frame, 41...Screw, 5
3... Holding claw, 61... Horizontal guide, 62... Horizontal moving body, 64, 65... Drive unit screw and motor, 7
DESCRIPTION OF SYMBOLS 1... Vertical guide, 72... Vertical moving body, 74... Air cylinder as a drive part, 77... Mover, 78...
Rotor, 87...Rotation source as a drive unit.

Claims (1)

[Claims] 1. A horizontal guide fixedly installed above the holder that holds and transports the object to be soldered in a direction in which the mounting frame of the holding claw of this holder can be moved and adjusted, and a horizontal guide provided on this horizontal guide so that it can move forward and backward. A movable body, a drive unit that moves the horizontal movable body forward and backward, a vertical guide provided on the horizontal movable body, a vertical movable body provided on the vertical guide so as to be movable up and down, and a drive that moves the vertical movable body up and down. a rotor that engages with a slider provided on the vertical moving body and engages with the mounting frame and a screw that fixes the mounting frame; and a drive unit that rotates the rotor in forward and reverse directions. Features: Opening/closing adjustment device for holding claws for soldering objects.