JPS6317026B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a soldering device that is capable of conveying printed circuit boards mounted with electronic components by narrowing the intervals between carriers in order to increase the number of soldered circuit boards per unit time. .

Conventionally, in soldering equipment that attaches different types of printed circuit boards to carriers and transports them, it takes time to attach the printed circuit boards to the carriers relative to the carrier traveling speed, and the time required to attach the printed circuit boards to the carriers on the conveyor chain increases. Due to the wide spacing, it is not possible to carry a small number of soldering products, and therefore, the number of soldering products per unit time in the soldering processing apparatus is small, resulting in poor productivity and reduced work efficiency.

This invention was made to eliminate the above-mentioned drawbacks, and an object thereof is to provide a soldering device with good productivity.

The present invention will be explained below based on the drawings.

FIGS. 1a and 1b are a plan view and a side view showing an embodiment of the present invention.

Hereinafter, the schematic structure of each part will be described with reference numerals.

1 shows the entire soldering device. P is a printed circuit board on which electronic components such as resistors and capacitors are mounted. 2 is a carrier on which the printed circuit board P is mounted. Reference numeral 3 denotes a carrier transfer device (hereinafter simply referred to as transfer device), in which after mounting the printed circuit board P on the carrier 2, the carrier 2 is attached to a free flow chain for mounting provided above a transfer device 4 consisting of a transfer rail and a transfer chain, which will be described later. 5, a mounting transfer table 6, a fixed transfer table 8, intermediate transfer tables 10, 12, and a return transfer table 1 for receiving the used carrier 2 that has been sent to the carrier 5 and returned.
4, and each transfer table is provided with free flow chains 7, 9, 11, 13, and 15, respectively, in a direction perpendicular to the conveyance direction of the conveyance device 4, and a return free flow chain 23, which will be described later. It is formed with

Reference numeral 16 denotes a soldering processing device in which a pre-soldering device, a finishing soldering device, a printed circuit board removing device, a nail cleaning device, etc. (not shown) are installed. 17 is a transport rail of the soldering processing device 16, 18 is a transport chain that transports the carrier 2, 19 is a lowering device that lowers the carrier 2, and 20 is a transporter that places both sides of the lower surface of the carrier 2 and transports it downward. 21 is an endless chain provided on both sides to vertically lower and raise each rail 20 synchronously; 22 is an endless chain for transporting the carrier 2 on the transport rail 17 onto the rail 20; An air cylinder 23 for placing the carrier 2 on the rail 20 and returning it to the transfer device 3
A free flow chain for return is provided below the soldering device 1 to return the product to the soldering device 1. Further, 24 is a carrier storage rail for storing the carriers 2 which are sorted by a detector at the upper part of the lowering device 19 and sent out to the outside.

Figures 2a and 2b show details of the carrier transfer device, and are a side view and a cross-sectional view showing a part of the transfer device 3 and the transfer device 4 as seen from the XX direction. 7 is a free flow chain for transferring the carrier 2, 31 is an air cylinder for raising and lowering the mounting transfer table 6, 32 is a stopper for the carrier 2, 33 34 is a rotary stopper that is clamped and locked between the stopper 32 and the printed circuit board P for mounting the printed circuit board P on the carrier 2; 34 is a drive device that rotates the stopper 33 using air pressure; and 8 is the transfer device. 3 is a fixed transfer table fixed to it, 9 is a free flow chain, 10 is an intermediate transfer table provided inside the free flow chains 5, 5 for mounting the transfer device 4, and 11 is the intermediate transfer table 10.
A free flow chain 35 is the intermediate transfer table 1.
12 is an intermediate transfer table provided inside the lower return free flow chains 23, 23, 13 is a free flow chain of the intermediate transfer table 12, and 36 is an air cylinder for raising and lowering the intermediate transfer table 12. 14 is a return transfer table that receives the carrier 2 from the intermediate transfer table 12; 15 is a free flow chain for the return transfer table 14; 37 is a rodless cylinder that raises and lowers the return transfer table 14. This rodless cylinder 37 is a type of air cylinder, and includes a piston without a rod inside the cylinder, and a piston yoke that is fixed integrally with the piston, and the piston moves when pressurized air is supplied into the cylinder. and a connecting fitting 38 that moves together while contacting the piston yoke.

Next, the operation of the transfer device 3 will be explained based on FIGS. 1 and 2.

Personnel are placed at each mounting transfer table 6 of the transfer device 3, and after manually mounting the printed circuit board P on which electronic components are mounted (the state shown in FIG. 2a), a start button (not shown) is pressed. By turning on the air cylinder 31, the mounting transfer table 6 rises in the direction of arrow A and reaches the position shown by the two-dot chain line at the same level as the fixed transfer table 8.

Next, the drive device 34 operates to rotate the stopper 33 clockwise to release the carrier 2 from the lock.

Next, the free flow chains 7 and 9 travel in the directions of arrows B and C, and the carrier 2 is transferred to the fixed transfer table 8. At this time, as shown in FIG.
If there is no other carrier 2 on the free flow chain 5 for mounting, that is, on the intermediate transfer table 10, the air cylinder 35 is activated and the intermediate transfer table 10 is raised.
The free flow chain 11 moves in the direction of arrow D, and the carrier 2 of the fixed transfer table 8 reaches the position indicated by the chain double-dashed line at the same level as the fixed transfer table 8.
will be transferred to.

Next, when the free flow chain 11 stops, the carrier 2 moves down the mounting free flow chain 5, which is running, by lowering the intermediate transfer table 10 in the direction of arrow E.
5 and transported toward the soldering processing device 16. In the soldering processing device 16, the carrier 2 is placed on the mounting free flow chain 5, and the engagement plate of the carrier 2 engages with the claw of the conveyance chain 18,
The wheels of the carrier 2 run on the transport rail 17,
Leave the free flow chain 11. Then, the printed circuit board P is soldered by the carrier 2 through preliminary soldering and final soldering processes, and after being cleaned and cut, the printed circuit board P is removed from the carrier 2 and placed outside the soldering processing device 16. sent to. The carrier 2 from which the printed circuit board P has been removed is moved to the lowering device 19
After passing through the free flow chain 23 for return, it travels and is returned to the transfer device 3, where it is stopped by a stopper activated by detection by a detector.

Here, when the stop of the carrier 2 is detected, the air cylinder 36 rises in the direction of arrow F, and the intermediate transfer table 12 becomes at the same level as the return transfer table 14.
Then, as the free flow chains 13 and 15 run, the carrier 2 is transferred in the direction of arrow G and transferred to the return transfer table 14. free flow chain 15
When it stops, the return transfer table 14, which is integrated with the connecting fitting 38, rises in the direction of arrow H due to the operation of the rodless cylinder 37, and stops at the position indicated by the two-dot chain line at the same level as the mounting transfer table 6.

Next, the free flow chains 15 and 7 run, and the carrier 2 is transferred in the direction of arrow I, transferred to the mounting transfer table 6, and comes into contact with the stopper 32 and stops. At this time, the stopper 33 is rotated counterclockwise by the drive of the drive device 34 to lock the carrier 2, thereby returning to the original state.

In addition, in the above operation, when the carrier 2 transferred from the opposing transfer device 3 is already on the intermediate transfer table 10, the free flow chain 9 on the transfer table 8 does not run and the carrier 2 stops. The carrier 2 on the intermediate transfer table 10 is transferred onto the mounting free flow chain 5 of the transfer device 4, and after being transferred, it starts traveling again.

In this way, the traveling and stopping of the carrier 2 are all controlled by the drive device using detectors and stoppers provided at necessary locations. For this reason, each transfer device 3
Now, if you manually attach the electronic components to the printed circuit board P, then attach this printed circuit board P to the carrier 2, and then press the start button (not shown), the carrier 2 will be automatically transferred. transported.

3a and 3b are a side view and a front view showing details of the lowering device 19 of the carrier 2, and the same reference numerals as in FIGS. 1a and 1b indicate the same parts. 2a is a wheel of the carrier 2, and 2b is an engagement plate of the carrier 2, which is engaged with an engagement pin 18a of the conveyance chain 18 to convey the carrier 2. 2c is a locking piece, 20a is a recess formed in the rail 20, and the wheel 2 of the carrier 2
a engages and stops movement in the running direction. Also, 22
a is a rod of the air cylinder 22; 22b is a locking piece rotatably provided at the tip of the rod 22a;
2c is a stopper that prevents the locking piece 22b from rotating clockwise.

Next, the operation of the lowering device 19 shown in FIG. 3 will be explained.

On the printed circuit board P with the soldering processing device 16,
After the soldering process is completed, the carrier 2 from which the printed circuit board P has been removed moves along the carrier rail 17 in the direction of arrow J while pushing the carrier 2, with the engagement pin 18a of the carrier chain 18 engaging with the engagement plate 2b of the carrier 2. Run to. Here, the locking piece 2c of the carrier 2
is the locking piece 22 of the rod 22a of the air cylinder 22.
However, since the locking piece 22b is not prevented from rotating counterclockwise, the carrier 2 passes through as it is. Here, when the detector (not shown) detects the passage of the carrier 2, the air cylinder 22 operates and the locking piece 22b comes into contact with the stopper 22c, preventing the carrier 2 from rotating clockwise. It is pushed in the direction of arrow J. At this time, the engagement pin 18
a is separated from the engagement plate 2b by the lowering of the conveyor chain 18, but since the rod 22a is pushing the carrier 2, the carrier 2 is placed on the rail 20 of the lowering device 19 without stopping, and the detector 41 detects the carrier 2. This causes the rod 22a to retreat. carrier 2
The wheels 2a are engaged with the recesses 20a of the rails 20 to prevent them from moving. When a detector (not shown) detects that the rod 22a has returned to its original position, the chain 21 of the lowering device 19 is operated to lower the carrier 2 on the rail 20.
0 comes into contact with the detector 42, so the operation of the lowering device 19 is stopped. Then, while the operation of the lowering device 19 is stopped, when the carrier 2 conveyed later is placed on the next rail 20 by the same operation as above, the lowering device 19 starts operating again. As each rail 20 descends, the carrier 2 that has descended first and is located at the detector 42 descends again and is placed on the return free flow chain 23 at the position shown by the two-dot chain line. Then, the rail 20 further descends, and the rail 20 touches the wheels 2 of the carrier 2.
After leaving from a, it reverses downward and ascends outside the descending device 19.

FIGS. 4a and 4b are a plan view and a side view showing the take-out device of the carrier 2, 2d shows a pin attached as necessary, and 2e shows the inside of the carrier. 51 is a detector for taking out the carrier 2, and 52 is an engagement piece for pushing the carrier 2 onto the carrier storage rail 24, which is rotated counterclockwise by a motor 53.

Next, the operation of the carrier take-out device shown in FIG. 4 will be explained.

The carrier take-out device is for cleaning the holding claws of the printed circuit board P of the carrier 2, and a pin 2d is attached in advance to the carrier 2 to be cleaned. In this case, when the carrier 2 is pushed out by the rod 22a of the air cylinder 22 as in FIG. 3, the pin 2d hits the detector 51, so the engagement piece 52 is rotated counterclockwise by the drive of the motor 53. The carrier 2 is pushed out in the direction of the carrier storage rail 24 by hooking the inside 2e of the frame of the carrier 2. Since the carrier storage rail 24 is inclined, the carrier 2 is lowered by its own weight and stored.

As explained above, the present invention includes a free flow chain for mounting provided on the front end side of the transport rail and extending in the same direction as the transport rail for transferring the carrier to the transport rail, and a mounting free flow chain extending from the rear end side of the transport rail to the front end side of the transport rail. A free flow chain for returning used and empty carriers that is installed over the side and below the transport rail, a transfer table for mounting whose vertical movement is controlled for mounting printed circuit boards on the carrier, and this mounting. A fixed transfer table that sends the carrier onto the free flow chain for mounting when the transfer table stops rising; an intermediate transfer table that receives the carrier on the fixed transfer table and places it on the free flow chain for mounting; and an intermediate transfer table for returning the carrier. An intermediate transfer table that lifts used empty carriers returned by the free flow chain from the return free flow chain, and a return transfer table that receives the carriers on the intermediate transfer table, raises them, and returns them to the mounting transfer table. and each transfer platform has a carrier transfer device equipped with a free flow chain on its surface that transfers the carrier horizontally and in a direction perpendicular to the transfer direction of the transfer rail; Each transfer device is equipped with a carrier lowering device consisting of an endless chain provided oppositely and operated in synchronization with the chain, and a plurality of pairs of rails fixed to the chain at predetermined intervals and on which carriers are placed. Even if a large number of carriers with printed circuit boards mounted on them are transferred to a transfer device, each carrier can be transferred continuously and soldered without colliding with each other while running.
Empty used carriers that have finished soldering can also be returned to each transfer device continuously, making full automation easy, increasing the amount of printed circuit boards soldered per unit time, and improving productivity. It has the advantage of

[Brief explanation of the drawing]

1A and 1B are a plan view and a side view showing one embodiment of the present invention, and FIGS. 2A and 2B are side views showing a part of the transfer device and the transfer device shown in FIGS. 1A and 1B. The cross-sectional views seen from the line, Figures 3a and b, are the same as Figures 1a and b.
Side and front views showing the lowering device, Figure 4 a, b
FIG. 1 is a plan view and a side view showing a carrier take-out device. In the figure, 1 is a soldering device, P is a printed circuit board, 2 is a carrier, 3 is a transfer device, 4 is a transfer device, 5 is a free flow chain for mounting, 6 is a transfer table for mounting, 7, 9, 11, 13 , 15 is a free flow chain, 8 is a fixed transfer table, 10 and 12 are intermediate transfer tables, 14 is a return transfer table, 16 is a soldering processing device, 17 is a transfer rail, 18 is a transfer chain, 19 is a lowering device , 20 is a rail, 21 is a chain, 22 is an air cylinder, 23 is a free flow chain for transportation, 24 is a carrier storage rail, 31,
35 and 36 are air cylinders, 32 and 33 are stoppers, 34 is a drive device, 37 is a rodless cylinder, 38 is a connecting fitting, and 41 and 42 are detectors.

Claims (1)

[Claims] 1. A carrier for mounting a printed circuit board, a transport chain and a transport rail for placing and transporting this carrier, and a solder for soldering the printed circuit board mounted on the carrier transported from this transport rail. a soldering apparatus having a soldering processing device; a mounting free flow chain provided on the front end side of the conveyance rail and extending in the same direction as the conveyance rail for transferring the carrier to the conveyance rail; and the conveyance rail. A return free flow chain is provided from the rear end side to the front end side and below the transport rail for returning a used empty carrier, and vertical movement is controlled for mounting the printed circuit board on the carrier. a mounting transfer table, a fixed transfer table that sends the carrier onto the mounting free flow chain when the mounting transfer table stops rising, and a fixed transfer table that receives the carrier on the fixed transfer table and transfers it onto the mounting free flow chain. an intermediate transfer table for placing the used empty carriers returned by the return free flow chain; an intermediate transfer table for lifting the used empty carriers returned from the return free flow chain; and an intermediate transfer table for receiving and raising the carriers on the intermediate transfer table. and a return transfer table for returning the transfer table to the mounting transfer table, and each of the transfer tables has a horizontal direction on its surface,
and a carrier transfer device including a free flow chain for transferring the carrier in a direction perpendicular to the conveyance direction of the conveyance rail; A soldering device comprising: a chain; and a carrier lowering device comprising a plurality of pairs of rails fixed to the chain at predetermined intervals and on which the carriers are placed.