JPH02192877A - Automatic soldering device - Google Patents

Abstract

PURPOSE:To prevent the soldering defects to be continuously generated by providing an electrical detector for solder clogging constituted in such a manner as to hold contacts normally open and to close the contacts by wire-shaped solder in the event of abnormality. CONSTITUTION:The wire solder 2 wound on a roll 1 is sent from between a gear 3 and a gear 4 and is supplied to a solder feed tube 5 when these gears are rotated by a motor. Detecting plates 7 and 9 in which a slight amt. of current is kept passed are mounted to the front end of the solder feed tube 5. Conductors 9 and 10 are respectively connected thereof. The wire solder bends between the gears 3, 4 and the entrance of solder feed tube 5 and comes into contact with the detecting plates 7 and 8 when the wire solder 2 delivered from the tube 5 is insufficiently melted on account of the oxidation of an iron tip 6 or the like at the time when the wire solder comes into contact with the iron tip 6. As a result, the current flows from the detecting plate 7 to the plate 8 and a buzzer 11 operates to announce the abnormality that the wire solder fails to emerge from the tube 5. The solder defects to be continuously generated are, therefore, prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solder feeding unit in an automatic soldering device, and more particularly to a solder feeding unit in an automatic soldering device that can detect solder clogging.

Conventional commercially available solder supply units do not have a mechanism to detect poor solder feeding, so if the solder thread does not melt at the iron tip, the solder gets clogged in the solder feeding tube, resulting in continuous soldering defects. This has the disadvantage of reducing the reliability of the device.

The object of the present invention is to automatically detect clogging, because if the solder fed by the two gears becomes insufficiently melted on the workpiece, clogging occurs in the solder feeding tube, resulting in continuous soldering defects. It is an object of the present invention to provide a solder supply unit that prevents soldering defects from occurring continuously.

When the solder is insufficiently melted, the solder that is continuously fed out in the solder feed tube becomes clogged, causing the solder to bend significantly at the tube entrance directly below the gear, causing the two gears to spin idle, preventing solder from being supplied to the workpiece. It becomes defective. Therefore, we focused on the fact that the solder bends significantly at the tube entrance when the tube becomes clogged, and the bent solder is detected electrically.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. When the gears 3 and 4 are rotated by a motor, the solder thread 2' wound around the roll 1 is fed between them and supplied to the solder feed tube 5. A small amount of current (50 mA or less) is applied to the tip (upper end) of the solder feed tube 5.
Detection plates 7 and 8, which are sinks, are mounted, and conductive wires 9 and 10 are connected to these, respectively. Also, groove line 9
A buzzer 11 is connected between and 10. Note that 6 is a soldering iron.

The thread solder 2 sent out from the solder feeding tube 5 is
If the soldering iron tip 6 becomes insufficiently melted when it hits the soldering iron tip 6 due to oxidation or other reasons, the solder thread 2 bends between the gears 3 and 4 and the inlet of the solder feed tube 5 and comes into contact with the detection plates 7 and 8. . As a result, current flows from the detection plate 7 to the detection plate 8 and the buzzer 11
is activated and notifies the user of an abnormality in which the solder wire 2 does not come out from the solder feed tube 5.

According to the present invention, it is possible to prevent soldering defects that occur continuously due to clogging of the solder wire in the solder feed tube when the solder wire becomes insufficiently melted at the iron tip, thereby improving the reliability of the device. It has the effect of

[Brief explanation of the drawing]

FIG. 1 is a partially sectional configuration diagram of a solder supply unit in an automatic soldering apparatus of the present invention, FIG. 2(a) is a plan view of its detection section, and FIG. 2(b) is a BB sectional view. .

Claims (1)

[Claims] 1. A solder supply unit that supplies filamentous solder;
There is a soldering iron for melting the filamentous solder, a solder feeding tube for feeding the filamentous solder from the solder supply unit to the soldering iron, and a normal contact opening. and an electrical detection device for a solder blockage configured to close the contacts with solder.