JPH0641930Y2 - PCB transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a transfer device for a printed circuit board, which enables the printed circuit board to be smoothly engaged with a holding claw of a transport chain.

[Conventional technology]

6 (a) and 6 (b) are a plan view and a side view showing the outline of a soldering device which has been conventionally used, 1 is a printed circuit board, 2 is the whole soldering device, and 3 is a primary Soldering device, 4 is a secondary soldering device, 5 is a pair of transport chains whose opposing parts run in parallel, 6 is a primary fluxer, 7 is a preheater, 8 is a flow dip type primary solder tank, and 9 is Cooler, 10 is a cutter device, 11 is a secondary fluxer, 12 is a jet type secondary solder bath, 13 is a free flow chain for transferring the printed circuit board 1, and 14 is each of the free flow chains 13 individually. The reference numeral 15 designates a motor for driving the conveyor chain 5, and 15 designates a sprocket of the carrier chain 5.

Next, the operation will be described.

Free flow chain that runs by driving each motor 14
When the printed circuit board 1 is placed on the printed circuit board 13, the printed circuit board 1 is transported in the direction of arrow A, and is transferred to and engaged with a holding claw (not shown) of the transport chain 5 of the primary soldering device 3 to engage with the primary soldering device. At 3, the primary soldering process is performed. Next, the printed circuit board 1 is placed on the free flow chain 13 in the next stage of the primary soldering device 3 from the transport chain 5, is transported by the drive of the motor 14, and is held by the transport chain 5 of the secondary soldering device 4. A nail (not shown) is transferred and engaged, and a predetermined soldering process is performed.

As described above, the primary soldering device 3 and the secondary soldering device 4 are connected by the free flow chain 13 and arranged in a straight line to improve the soldering efficiency.

[Problems to be solved by the device]

By the way, in the conventional printed circuit board transfer device, since the motors 14 are individually driven by the free flow chains 13, the motors 14 do not start at the same time, or the free flow chains 13 are separated due to the difference in rotation speed. The problem is that the printed circuit board 1 does not travel at the same speed, and therefore is transported in a state where it is placed in an oblique direction with respect to the horizontal plane, and it is difficult or impossible to transfer to the soldering devices 3 and 4. was there. In addition, the free flow chain 13 is connected to the transport chain 5
Since the distance within the radius of the sprocket 15 or within the radius of rotation of the holding claw cannot be made close, it is difficult to engage with the holding claw of the transport chain 5 when the printed board 1 is small. Further, when the printed circuit board 1 soldered by the primary soldering device 3 is warped, there is a problem that it is difficult to engage with the holding claws.

The present invention has been made to solve the above problems, and enables adjustment of the holding width of the printed circuit board, correction of warpage, and smooth engagement with the holding claws of the transport chain. An object of the present invention is to obtain a transfer device for a printed circuit board that can be transferred together.

[Means for Solving the Problems]

A transfer device for a printed circuit board according to the present invention includes a pair of conveyor belts on which a printed circuit board is mounted, the guide rails are engaged with each other, and the opposing portions travel in parallel, and a drive pulley for traveling the conveyor belts. And a conveyor belt traveling device including a rotating shaft that rotates the driven pulley by the rotational force of the driving pulley, and a conveyor belt on the driven pulley side of the printed circuit board corresponding to the width of the printed circuit board. In order to move in the direction perpendicular to the running direction, the rotational force from the rotating shaft is transmitted to the driven pulley in one direction, and the one-way clutch with no inner ring that idles in the other direction is inserted into the rotating shaft. And a printed circuit board holding width changing device in which the outer ring of the one-way clutch is connected to a driven pulley.

Further, while the printed circuit board is placed on the conveyor belt, its circumferential portion abuts on the upper surface portion near the side edge of the printed circuit board, and the printed circuit board on the conveyor belt is pressed downward by the restoring force of the tension spring. An upper surface pressing device provided with a rotatable rotating pressing disk is provided.

Further, an engaging groove for engaging the side edge portion of the printed circuit board and pressing it in the horizontal direction is formed in the circumferential direction,
A side edge pressing device provided with a rotatable rod whose longitudinal direction is set in the vertical direction and a motor for rotating the rod is provided.

[Action]

In this invention, when the driving pulley is rotated in the meshing direction of the one-way clutch by the driving means, the rotary shaft and the one-way clutch are meshed with each other, and the driven pulley is simultaneously rotated through the rotary shaft. The conveyor belts start running at the same time and run at the same speed,
And stop at the same time. On the other hand, when the drive means is stopped or reversely rotated to stop or reverse the rotation of the rotary shaft, the engagement between the one-way clutch and the rotary shaft is released, and the driven pulley can be moved in the axial direction. . When the rotating shaft is rotated by the driving means after the completion of the movement, the rotating shaft and the one-way clutch are engaged again, and the driven pulley is the same as the driving pulley with the conveyor belt set at the position corresponding to the holding width of the printed circuit board. Can be rotated at speed.

Further, since the upper surface near the side edge of the printed circuit board is pressed while rotating by the rotation pressing plate, even if the printed circuit board is warped, it is corrected to a water surface shape and the engagement of the rod of the next stage with the engagement groove is prevented. Become smooth.

Further, since the side edge portion of the printed circuit board travels while being pressed by the engaging groove of the rotating rod, the transfer chain can be more smoothly transferred to the holding claw.

〔Example〕

1 (a) and 1 (b) show an embodiment of the present invention. FIG. 1 (a) is a plan view, and FIG. 1 (b) is I-I of FIG. 1 (a). Sectional view taken along the line, FIG. 2 (a), (b)
FIG. 3 is a plan view and a side view showing a schematic configuration of a soldering device using the printed circuit board transfer device of the present invention.
In these figures, the same reference numerals as those in FIG. 6 indicate the same parts, 16 indicates the entire soldering device, 17 is a chain guide, 18 is a holding claw, and 18A is a locus of the holding claw 18. 1
Reference numeral 9 denotes an entire transfer device for transferring the printed circuit board 1 to the transfer chain 5, 20 is a transfer belt traveling device for transferring the printed circuit board 1, 21 is a base, 22 is a guide rail, and 23 is opposite. A pair of conveyor belts 24 having convex cross-sections whose running portions run in parallel are integrally formed in the longitudinal direction of the conveyor belt 23, and a mounting surface 23a on which the side edge 1a of the printed circuit board 1 is mounted. And a protruding portion that separates the engaging surface 23b that engages with the guide rail 22, 24a is a side surface portion of the protruding portion 24, 25 is a driving pulley that causes the one conveyor belt 23 to travel, 26 Is a driven pulley that drives the other conveyor belt 23, and 27 is a driving pulley.
A motor for driving the conveyor belt 23 by driving 25, 28 is a driving gear directly connected to the motor 27, 29 is a driven gear, 30 is a rotating shaft, 31 is fixed to the base 21. The fixed-side bearing 32 is a slide-movable-side bearing that can slide in the direction of arrow B corresponding to the width of the printed circuit board 1, the details of which are shown in FIG.

FIG. 3 is a sectional view taken along line II-II of FIG. 1 (a), showing a printed circuit board holding width varying device, the same reference numerals as in FIG. 1 denote the same parts, and 33 denotes the fixed side. The case 31 of the bearing 31 is a bearing and includes an outer ring 34a and an inner ring 34b. Reference numeral 35 denotes a one-way clutch attached to the movable side bearing 32. The one-way clutch includes an outer ring 35a and a cam 35b, and is directly attached to the rotary shaft 30 without an inner ring. The rotary shaft 30 rotates in the direction of arrow C. When the transport belt 23 travels in the transport direction of the printed circuit board 1 (arrow A direction), the cam 35b engages with the outer ring 35a and the rotary shaft 30, and the rotational force of the rotary shaft 30 is transmitted to the driven gear 29. , When the conveyor belt 23 travels in the direction opposite to the arrow A by rotating in the rotation stopped state or in the direction opposite to the arrow C, the outer ring 35a of the cam 35b
Since the engagement between the shaft 32 and the rotary shaft 30 is released and the shaft 32 idles, the bearing 32 can be slid in the arrow B direction. 36 is a bearing without an inner ring and an outer ring
It has 36a. Therefore, since the bearing 36 can support the rotating shaft 30 while rotating it, the bearing 36 can slide in the arrow B direction together with the one-way clutch 35. Incidentally, the one-way clutch 35 without the inner ring directly attached to the rotary shaft 30 and the bearing 36 without the inner ring are known, 37 is a collar, and the one-way clutch 35 and the bearing 36 are fitted with the driven gear 29. Are connected. Reference numeral 38 denotes a bearing fitted and coupled to the collar 37, which has an outer ring 38a and an inner ring 38b, and 39 denotes a case, which is fixed to the base 21. Further, reference numeral 40 denotes the entire printed circuit board holding width variable device.

In FIG. 1, reference numeral 41 designates the printed circuit board 1 as a conveyor belt.
Upper surface 1 near the side edge 1a placed on the placing surface 23a of 23
An upper surface pressing device for pressing b is shown in detail in FIG.

4 (a) and 4 (b) are a plan view and a side view of the upper surface pressing device 41, the same reference numerals as those in FIG. 1 denote the same parts, 42 is a base of the upper surface pressing device 41, 43 is an arm, Reference numeral 44 is a mounting shaft to which the arm 43 is rotatably mounted, and 45 is a rotatable pressing disc, which presses the upper surface portion 1b of the printed circuit board 1 with its circumferential portion 45a and rotates by the traveling of the printed circuit board 1. To do. 46 is a rotating shaft of the pressing disk 45, and 47 is a tension spring mounted between the base 42 and the arm 43, and the pressing disk 45 is constantly pressed downward by its restoring force. Reference numeral 48 is an adjusting bolt for adjusting the restoring force of the tension spring 47.

In FIG. 1, reference numeral 51 is a side edge pressing device for engaging the side edge portion 1a of the printed circuit board 1 and lightly pressing it in the horizontal direction, the details of which are shown in FIG.

FIG. 5 shows a side view of the side edge pressing device 51. Figures 1 and 5
In the figure, 52 is a base, 53 is a rotatable rod whose longitudinal direction is provided in the up-and-down direction, and 54 is a circumferential direction below the rod 53 for engaging the side edge portion 1a of the printed circuit board 1. 5, 55 is a belt stretched around the rod 53, 56 is a drive motor for rotating the rod 53 via the belt 55, 57 is a guide plate, and 57a is an upper edge portion.

Next, the operation will be described.

First, in order to adjust the width of the conveyor belt 23 corresponding to the printed circuit board 1, the rotation drive of the motor 27 is stopped, or the rotation shaft 30 is opposite to the arrow C direction in FIGS. 3 (a) and 3 (b). When driven in the direction of rotation, the cam 35b of the one-way clutch 35 disengages the outer ring 35a from the rotary shaft 30 and becomes idle with respect to the rotary shaft 30 so that it can be freely slid in the direction of arrow B. Become. Therefore, the bearing 32 is slid in the direction of the arrow B corresponding to the width of the printed circuit board 1 so that the side surface portion 24a of the ridge 24 of the conveyor belt 23 contacts the side edge portion 1a of the printed circuit board 1. .

Next, when the motor 27 is driven to rotate the rotary shaft 30 in the direction of arrow C, the cam 35b of the one-way clutch 35 causes the outer ring 35a to move.
The rotation force of the rotation shaft 30 is transmitted to the driven pulley 26 via the collar 37 by meshing with the rotation shaft 30 and the conveyor belt 23 travels. The printed board 1 is placed so that the side edge portion 1a of the printed circuit board 1 contacts the portion 24a.

Next, the printed circuit board 1 on the conveyor belt 23 runs, and the upper surface portion 1b of the printed circuit board 1 pushes up the pressing disc 45 of the upper surface pressing device 41 and pulls it, as shown by the chain double-dashed line in FIG. 4 (b). The upper surface 1b of the printed board 1 is pressed by the restoring force of the spring 47 so that the upper surface 1b of the printed board 1 is smoothly engaged with the engaging groove 54 of the rod 53 of the side surface pressing device 51 at the next stage. Next, the printed circuit board 1 continues to run further, and engages with the engaging groove 54 of the rod 53 of the side edge pressing device 51 that presses the side edge portion 1a of the printed circuit board 1 and gently presses the side edge portion 1a horizontally. Further, the guide plate 57 travels while sliding on the upper edge portion 57a and is held by the holding claw 18.

Next, the printed circuit board 1 engaged with the holding claws 18 is subjected to a primary soldering process by the primary soldering device 3, and then provided between the primary soldering device 3 and the secondary soldering device 4. By the transfer device 19, the secondary soldering process is performed by transferring from the primary soldering device 3 to the secondary soldering device 4.

[Effect of device]

As described above, the present invention has a pair of conveyor belts on which a printed circuit board is mounted, the guide rails are engaged with each other, and the facing portions run parallel to each other, and a driving pulley for driving these conveyor belts. , A conveyor belt traveling device composed of a rotating shaft for rotating the driven pulley by the rotational force of the driving pulley, and the conveyor belt on the driven pulley side corresponding to the width of the printed circuit board in the traveling direction of the printed circuit board. Since it can move in the direction perpendicular to the following, it transmits the rotational force from the rotating shaft to the driven pulley in one direction, and inserts and fits the rotating shaft with a one-way clutch that does not idle in the other direction. On the other hand, since the one-way clutch outer ring is connected to the driven pulley and the printed circuit board holding width varying device, the holding width for the printed circuit board can be adjusted, and Without even oblique to the running direction of the chain, in parallel with conveyance.

In addition, the circumference of the printed circuit board contacts the upper surface of the conveyor belt near the side edge, and the printed circuit board on the conveyor belt is rotated downward while being pressed downward by the restoring force of the tension spring. Since the upper surface pressing device provided with the free pressing disk is provided, the warp can be corrected even if the printed circuit board is warped by being soldered by the primary soldering.

Further, an engaging groove for engaging the side edge portion of the printed circuit board and pressing it in the horizontal direction is formed in the circumferential direction,
Since a side edge pressing device having a rotatable rod whose longitudinal direction is set in the vertical direction and a motor for rotating the rod is provided, even a small printed circuit board can be held by the transfer device from the transfer device. It has advantages such as smooth and reliable engagement with the claws.

[Brief description of drawings]

1 (a) and 1 (b) show an embodiment of the present invention. FIG. 1 (a) is a plan view, and FIG. 1 (b) is I-I of FIG. 1 (a). Sectional view taken along the line, FIG. 2 (a), (b)
Is a plan view and a side view showing a schematic configuration of a soldering device using the printed circuit board transfer device of the present invention, FIG. 3 is a sectional view taken along line II-II of FIG. 1 (a), and FIG. 1A and 1B are a plan view and a side view of the upper surface pressing device of FIG. 1, FIG. 5 is a side view of a side edge pressing device, and FIG. 6 is a plan view showing an outline of a conventional soldering device. It is a side view. In the figure, 1 is a printed circuit board, 1a is a side edge portion, 1b is an upper surface portion, 16
Is a soldering device, 19 is a transfer device, 20 is a conveyor belt traveling device, 22 is a guide rail, 23 is a conveyor belt, 24 is a ridge portion, 24a is a side surface portion, 25 and 26 are pulleys, 30 is a rotating shaft, 35 Is a one-way clutch, 35a is an outer ring, 35b is a cam, 36 is a bearing, 36a is an outer ring, 40 is a printed circuit board holding width varying device, 41 is an upper surface pressing device, 45 is a pressing disk, 45a is a circumferential portion, and 47 is a tensile member. Spring, 51 is side edge pressing device, 53 is rod, 54
Is an engaging groove, and 56 is a motor.

Claims (3)

[Scope of utility model registration request] 1. A pair of conveyor belts on which a printed circuit board is placed and which engages with guide rails and whose opposing portions travel in parallel, a drive pulley for traveling these conveyor belts, and a drive pulley for this drive belt. A conveyor belt traveling device composed of a rotating shaft for rotating the driven pulley by the rotational force of the pulley, and the conveyor belt on the driven pulley side corresponding to the width of the printed circuit board and the traveling direction of the printed circuit board. In order to enable movement in the right angle direction, the rotational force from the rotary shaft is transmitted to the driven pulley in one direction, and the one-way clutch having no inner ring that idles in the other direction is inserted into the rotary shaft. And a printed circuit board holding width varying device in which the outer ring of the one-way clutch is connected to the driven pulley. 2. A restoring force of a tension spring for tensioning the printed circuit board on the conveyor belt by contacting a peripheral portion of the printed circuit board on an upper surface of the printed circuit board near a side edge of the conveyor belt. The printed circuit board transfer device according to claim 1, further comprising an upper surface pressing device provided with a rotatable pressing disc that rotates while being pressed downward by. 3. A rotatable rod in which an engaging groove for engaging a side edge portion of a printed circuit board and pressing it in a horizontal direction is formed in a circumferential direction, and a longitudinal direction of the engaging groove is set in a vertical direction. The printed circuit board transfer device according to claim 1, further comprising a side edge pressing device having a motor for rotating the rod.