JPH028628Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an automatic soldering device featuring a preheater.

[Conventional technology]

Generally, automatic soldering equipment uses a fluxer that applies flux to the object to be soldered, a preheater that preheats the object to be soldered, and a solder bath that attaches molten solder to the bottom surface of the object to be soldered. This makes up an automatic soldering line.

Conventionally, the preheater is fixed at a constant height after the level is adjusted.

[Problem that the invention attempts to solve]

However, with this conventional fixed type preheater, when a problem occurs in the automatic soldering line and the line is temporarily stopped, the soldering object located on the preheater may overheat the preheater. As a result, there is a risk that integrated circuit components and the like mounted on the printed wiring board as objects to be soldered may be destroyed by the heat.

On the other hand, it is not possible to stop the preheater by stopping the power supply to the preheater. This is because if the temperature of the preheater drops by stopping the power supply to the preheater, it will take time to reach the operating temperature after restarting the preheater the next time it is used.

An object of the present invention is to protect a soldered object that has come to an emergency stop on a preheater from the heat of the preheater without stopping the power supply to the preheater.

[Means for solving problems]

In the present invention, at least along the fluxer 3, preheater 4, and solder bath 5, the soldering object 1
In an automatic soldering device that solders the object 1 to be soldered while conveying the preheater 4, the main body frame 21 of the preheater 4 is supported so as to be vertically movable by a vertical movement mechanism 22 that is lowered when the conveyance is stopped in an emergency. be.

[Effect]

In the present invention, when trouble occurs in an automatic soldering line and the soldering line is brought to an emergency stop, the main body frame 21 of the preheater 4 is lowered by the vertical movement mechanism 22, and the preheater 4
is spaced apart from the object 1 to be soldered, so that the heating applied from the preheater 4 to the object 1 to be soldered is weakened.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings.

As shown in FIG. 1, a fluxer 3, a preheater 4, a solder bath 5, and a cooling fan 6 are arranged along a conveyor 2 of an automatic soldering line that conveys a printed wiring board 1 as an object to be soldered. will be established sequentially.

The fluxer 3 jets the foamed flux from the foaming cylinder 11 through the nozzle 12, and applies the foamed flux 13 to the lower surface of the printed wiring board 1.

The preheater 4 has a main body frame 21 that is movable up and down by a vertical movement mechanism 22. Inside the main body frame 21, a sheathed heater 23 that radiates high heat when energized is disposed over the entire surface.

The solder bath 5 jets molten solder from a nozzle 32 that is pumped under pressure by a rotationally driven pump blade 31, and the solder jet 33 coats the lower surface of the printed wiring board 1 and its mounted components 34.
Solder the leads.

As shown in FIG.
A cylinder mounting frame 43 is provided through the mounting plate 44 on this frame 43, and a fluid pressure cylinder 45 such as a pneumatic or hydraulic cylinder is fixed by its flange portion 46. A guide 47 is provided, and rods 49 provided on both sides of the vertically movable plate 48 are fitted into the guides 47 on both sides of the vertically movable plate 48 so as to be vertically movable. Connect to the central mounting bracket 52.

Furthermore, a bearing plate 5 is placed on one side of the vertical moving plate 48.
On the other hand, a bearing plate 54 is attached to one side of the main body frame 21 of the preheater 4, and both bearing plates 53 and 54 are rotatably mounted on a shaft 55. Further, a preheater inclination angle adjusting screw 56 is screwed onto the other side of the vertically movable plate 48, and this adjusting screw 56 supports the lower surface of the other side of the main body frame 21. This screw 56 allows the angle of inclination of the preheater 4 to be adjusted in accordance with the adjustment and change of the angle of inclination of the entire soldering line.

When the automatic soldering line is operating normally, the piston rod 51 of the fluid pressure cylinder 45 is raised, and the preheater 4 is maintained at a predetermined raised level.

Next, when a trouble occurs in the automatic soldering line and the soldering line is brought to an emergency stop, the fluid pressure cylinder 45 is operated in conjunction with the emergency stop of the line or by manual operation, and the piston rod 51 is activated. is pulled down, and the main body frame 21 of the preheater 4 is lowered.

As a result, the sheathed heater 23 of the preheater 4
is spaced apart from the printed wiring board 1, and the heat acting on the printed wiring board 1 from this sheathed heater 23 is weakened.

Therefore, even if the printed wiring board 1 remains stopped on the preheater 4 due to trouble in the soldering line, the printed wiring board 1 will not be excessively heated, and the printed wiring board 1 34 parts such as ICs installed in
is not destroyed by heat.

[Effect of idea]

According to the present invention, since the main body frame of the preheater is supported in a vertically movable manner by a vertical movement mechanism that moves downward during an emergency stop of conveyance, even if trouble occurs in the automatic soldering line and the line stops in an emergency, the preheater By separating the solder from the object to be soldered, the object to be soldered that has stopped on the preheater can be effectively protected from the heat of the preheater without stopping the current supply to the preheater. In addition, it is possible to prevent the components mounted on the soldering object from being destroyed by heat.

Furthermore, since there is no need to stop the power supply to the preheater, the preheater can be used immediately when the automatic soldering line is restarted, and unnecessary downtime of the soldering line can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the automatic soldering apparatus of the present invention, and FIG. 2 is a sectional view of a mechanism for moving the preheater up and down. 1... Printed wiring board as an object to be soldered, 3... Fluxer, 4... Preheater, 5...
Solder bath, 21...main frame of preheater,
22... Vertical movement mechanism.

Claims (1)

[Scope of utility model registration request] In an automatic soldering device that solders an object to be soldered while conveying the object along at least a fluxer, a preheater, and a solder bath, the main body frame of the preheater is moved upwardly and downwardly when the conveyance emergency stops. An automatic soldering device characterized by being supported by a moving mechanism so that it can move up and down.