JPH025505B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic soldering device.

[Conventional technology]

The applicant relating to the present invention previously filed a patent application filed in 1983-
In application No. 77169 (Japanese Unexamined Patent Publication No. 59-202163), the main body of a workpiece having leads to be soldered is fitted inside a track consisting of a long guide member, and the upper side of this track is fitted along this track. A transfer convex portion moved by an endless chain disposed in the track is inserted into the track during rotation from the upper side to the lower side, and this transfer convex portion is engaged with the workpiece in the track, thereby moving the workpiece into the track. The present invention proposes an invention relating to an automatic soldering apparatus that solders the leads by sliding them one by one while processing them using a fluxer, a soldering tank, and a post-cleaning tank provided along the track.

[Problem that the invention seeks to solve]

Since the track is susceptible to contamination due to the flux jetted from the fluxer and the molten solder jetted from the solder bath, it is necessary to remove the track from the automatic soldering line from time to time and clean it.

At this time, the long track must be taken out horizontally in a direction perpendicular to the line direction (laterally), but since the transfer convex part fits inside the track, the track cannot be taken out from the line if it is left as is. I can't.

Conventionally, the entire endless chain was moved so as to float upward, the transfer convex portion was pulled out from the truck, and the truck was taken out to the side, but the endless chain was very large-scale. Because of this, it is difficult to adjust the vertical movement, which poses an obstacle in truck maintenance.

SUMMARY OF THE INVENTION An object of the present invention is to facilitate the maintenance of a truck by making it possible to partially and easily adjust the vertical movement of an endless chain for moving a transfer convex portion fitted into a truck.

[Means for solving problems]

In the present invention, the main body of the workpiece 23 having the lead 25 to be soldered is connected to the elongated guide portions 21 and 22.
A transfer convex portion 3 that fits inside a track 2 consisting of a
4 is fitted into the track 2 when rotating from the upper side to the lower side, and by engaging the transfer convex portion 34 with the workpieces 23 inside the track 2, the workpieces 23 are slid one by one inside the track 2. The fluxer 14 provided along the track 2 and the solder bath 1
6. After processing in the post-cleaning tank 17, the above-mentioned lead 25
In an automatic soldering apparatus for soldering, an upper sprocket 41 and a lower sprocket 42 form a rotating section that supports at least the end of the endless chain 31 on the workpiece loading side. And the lower sprocket 42
is provided so that it can be moved up and down. Further, the lower part of the endless chain 31, which corresponds between the solder bath 16 and the post-cleaning bath 17, is supported so as to be pushed up by an intermediate sprocket 45 that is movable up and down.

[Effect]

According to the present invention, when the track 2 dirty with flux or solder is taken out from the automatic soldering machine to be cleaned, the lower sprocket 42 is released so that it can be raised freely, and the intermediate sprocket 45 is pushed up. Because of the tension acting on the endless chain 31, the lower sprocket 42 moves up in conjunction with the intermediate sprocket 45, so that only the portion of the sprocket 31 that is stretched between the two sprockets 42 and 45 is raised, and the transfer convex portion 34 inserted into that portion is pulled out from the track 2. As for the ascending portion of the endless chain 31, while the track 2 easily gets dirty, the corresponding portion up to the solder tank 16 can be separated and removed from the automatic soldering apparatus.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 and 2, a loader 3 for taking out an integrated circuit component (hereinafter referred to as an IC) as a workpiece from a magazine 1 and inserting it into a track 2 is provided at the starting end of the automatic soldering device. An unloader 5 for collecting the IC from the track 2 into an empty magazine 4 is provided at the end of the automatic soldering device.

The loader 3 takes out the real magazine 1 in which a large number of ICs are loaded into multiple rows of IC insertion grooves from the real magazine storage section 6 onto the moving table 7, and transfers it to the central part facing the track 2. This magazine 1
Insert the tip feeding claw of feeder 8 into the IC insertion groove of
The forward action of the tactile movement of the feeder 8 causes the ICs in the magazine 1 to be fed into the track 2 one by one. When the feeder 8 feeds the last IC into the track 2, the feeder 8 is moved backward, and the empty magazine is transferred to the empty magazine storage section 9 by the moving table 7, and a new one is transferred from the actual magazine storage section 6 to the center section. Make sure to take out real magazine 1.

The unloader 5 is substantially similar to the loader 3, and sets an empty magazine 4 in the center facing the truck 2 to collect ICs sent from the truck 2.

The automatic soldering apparatus includes, along the track 2, pre-cleaning tanks 11 and 12, an air blow unit 13, a foaming fluxer 14, a preheater 15,
A jet soldering tank 16, a post-cleaning tank 17, an air blow unit 18, a drying heater 19, etc. are arranged in this order.

As shown in FIG. 3, the track 2 includes a large number of T-shaped guide members 21 and a concave guide member 2.
2, the main body of the IC 23 is placed so as to straddle the adjacent concave guide member 22, and the T
The shaped guide member 21 prevents the main body of the IC 23 from rising. A large number of holes 24 are bored in the concave guide member 22 .

Furthermore, as shown in FIGS. 1 and 2, a pair of endless chains 31 are disposed along the track 2 above the track, and L-shaped members are inserted at regular intervals between the pair of endless chains 31. 32 is provided, and a transfer plate 33 is attached to this L-shaped member 32 as shown in FIG. This transfer plate 33 is formed with a comb-shaped transfer convex portion 34, and this transfer convex portion 34 fits into the track 2 when the endless chain 31 rotates from the upper side to the lower side, as shown in FIG. By fitting the ICs 23 in the track 2 in this way, the ICs 23 are pressed and slid one by one inside the track 2.

While the IC 23 is moved in the track 2 in this manner, the flux flowing from the foaming fluxer 14 and the molten solder flowing from the jet solder bath 16 are passed through the holes 24 of the track 2.
Supplied to lead 25 of IC23, this lead 25
Solder the entire part. As a result, an anti-oxidation film is formed on the entire surface of the lead 25.
Even after soldering, residual flux adhering to the IC etc. is washed away in a post-cleaning tank 17.

Next, as shown in FIG. 2, a rotating section that supports the end of the workpiece loading side of the endless chain 31 is formed by the upper fixed position sprocket 41 and the lower movable sprocket 42, and the above-mentioned A rotating section that supports the end of the endless chain 31 on the workpiece unloading side is formed by upper and lower fixed position sprockets 43 and 44. One of the sprockets 43 and 44 is used as a drive sprocket and is forced to rotate. Furthermore, the solder tank 16 is located at the lower side of the endless chain 31.
The portion corresponding to the space between the and the post-cleaning tank 17 is supported so as to be able to be pushed up by an intermediate sprocket 45 that is movable up and down, and the opposite side is supported by an intermediate sprocket 46 that is in a fixed position. In addition, the truck 2 has a portion corresponding to the carry-in end and the intermediate portion between the liftable sprockets 42 and 45.
Provided so that it can be separated from the rest and taken out.

As shown in FIGS. 4 and 5, the structure that allows the lower sprocket 42 to move up and down at the carry-in end is fixed between side plates 51 on both sides, and the upper sprocket 41 is mounted on a bearing 52. A pair of arms 55 are rotatably provided via a bearing 54 on a support shaft 53 that is rotatably fitted and supported through the support shaft 53, and a support shaft 56 is provided at the lower part of the arm 55 to connect the lower side through the bearing. A sprocket 42 is rotatably supported. During soldering, the spindle 56 of the lower sprocket 42 is fixed in place by fitting a fixing pin 57 inserted from the outside through the side plate 51 on one side into the end of the spindle 56. . The fixing pin 57 is removably fixed to the side plate 51 via a mounting plate 58 with bolts and nuts (not shown).

Further, as shown in FIGS. 6 and 7, the mounting structure of the intermediate sprockets 45, 46 is such that the sprockets 46 are rotatably supported on the left and right fixing plates 61, and the sprockets 46 are rotatably supported on the left and right fixing plates 61. A guide member 63 is fixed to the lower side of 61 via a support frame 62,
As shown in FIG. 8, a slider 64 is fitted into this guide member 63 in a dovetail groove so as to be movable up and down. Further, an elevating plate 66 is provided on the slider 64 via a mounting plate 65, and the intermediate sprocket 45 is rotatably supported on the elevating plate 66 via a support plate 67.
Furthermore, the feed screw 68 rotatably held by the upper and lower portions of the guide member 63 is inserted into the slider 64.
The slider 64 is caused to move up and down along the guide member 63 by screwing the feed screw 68 into the center of the guide member 63 and rotating the feed screw 68 by a motor 70 that can be rotated forward and backward through a chain transmission mechanism 69. .
When the slider 64 is raised, the sprocket 45 also rises, pushing up the intermediate portion of the endless chain 31.

When the track 2 contaminated with flux and solder is taken out of the automatic soldering machine for cleaning, the fixing pin 57 is inserted from the support shaft 56 of the lower sprocket 42 at the carry-in end.
By removing the support shaft 57 and releasing the fixation of the support shaft 57, the arm 55 can freely rotate. Then, when the motor 70 is driven and the intermediate sprocket 45 is pushed up, the endless chain 3
1, the arm 55 rotates about the support shaft 53 of the upper sprocket 41 so as to be drawn toward the intermediate sprocket 45.
As a result, the lower sprocket 42 rises in conjunction with the intermediate sprocket 45, so that both sprockets 42, 42 of the endless chain 31
45 is raised, and the transfer convex portion 34 provided in that portion is pulled out from the track 2. The above-mentioned partial lifting range of the endless chain 31 corresponds to the part up to the solder tank 16 where the track 2 is easily contaminated, and the track 2 can be removed from the automatic soldering device by separating the corresponding part up to the solder tank 16. .

In addition, the sprocket 4 on the lower side of the carry-in end
2 so as to be movable up and down is not limited to the structure of this embodiment.
It is sufficient to fit it so that it can move up and down, and to fix it downward during soldering. Further, the upper and lower sprockets 43 and 44 at the discharge side end may be a single large diameter sprocket.

〔Effect of the invention〕

According to the present invention, in an endless chain having a transfer convex portion that fits into a track to transfer a workpiece, at least the rotating portion of the endless chain on the workpiece loading side is connected to the upper sprocket and the lower sprocket. The lower sprocket is provided to be movable up and down, and the lower part of the endless chain corresponding to the portion between the soldering bath and the post-cleaning tank is provided with an intermediate sprocket that is movable up and down. Since the endless chain is supported so that it can be pushed up, when the track becomes heavily contaminated with flux and solder, the lower sprocket can be released so that it can be raised, and the intermediate sprocket can be pushed up to reduce the tension acting on the endless chain. By raising the lower sprocket in conjunction with the intermediate sprocket, it is possible to easily raise only the portion of the endless chain that is stretched between the two sprockets, and the sprocket is provided in that portion. By pulling out the transfer convex portion from the track, the track soiled with flux and solder can be easily taken out from the automatic soldering device, and maintenance such as cleaning of the track can be easily performed.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the automatic soldering apparatus of the present invention, Fig. 2 is a front view thereof, Fig. 3 is an enlarged perspective view of the track, and Fig. 4 is a view of the workpiece loading side end. 5 is a sectional view taken along the - line in FIG. 4, FIG. 6 is a sectional view showing the vertical movement mechanism of the intermediate sprocket, FIG. 7 is a sectional view taken along the - line in FIG. 6, and FIG. It is a sectional view taken along the - line in the figure. 2...Truck, 14...Fluxa, 16...
Solder bath, 17...Post-cleaning tank, 23...IC as a workpiece, 25...Lead, 31...Endless chain, 34...Transfer convex portion, 41...Upper sprocket, 42...Lower sprocket , 45
...Intermediate sprocket.

Claims (1)

[Claims] 1. The main body of the workpiece having the lead to be soldered is fitted inside a track consisting of a long guide member, and a transfer convex portion is moved along this track by an endless chain disposed above this track. When rotating from the upper side to the lower side, it fits into the track, and by engaging the transfer convex portion with the workpieces in the track, the workpieces are slid one by one in the track and moved along the track. In an automatic soldering machine that processes the leads using a fluxer, a soldering bath, and a post-cleaning bath, the circulating section that supports at least the end of the endless chain on the workpiece loading side is connected to the upper sprocket and the lower sprocket. The lower sprocket is formed by a side sprocket, and the lower sprocket is provided to be movable up and down, and the lower part of the endless chain corresponding to the part between the solder bath and the post-cleaning bath is formed by a middle sprocket that is movable up and down. An automatic soldering device characterized by being supported by a sprocket so that it can be pushed up.