JPS5836446Y2 - solder melting equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a solder melting device, and is particularly characterized in that a wire breakage detection means is attached to a heating wire heater.

A conventional solder melting device has a structure as shown in FIGS. 1 to 4.

This conventional device will now be explained with reference to the drawings.

FIG. 1 is an external perspective view of a conventional device, in which reference numeral 1 denotes a cylindrical rotating container in which solder 2 is stored.

As shown in the cross section of FIG. 2, this rotary container 1 has a double wall structure, and a heat insulating material 3 is sealed between the double walls.

A flange 4 is fixed to the outer bottom of the rotary container 1, and bearings 6, 7 fixed to the base 5 are attached to the flange 4.
A rotary shaft 8 rotatably held is fixed to the shaft.

This rotating shaft 8 is connected to a rotating shaft 12 of a motor 11 via a spur gear 9.10.

Inside the rotary container 1, a sheathed heater 13 made of a heating wire that is electrically and mechanically connected to the outside but does not come into contact with the rotary container 1 is wound several times concentrically with the rotary container 1. Deployed twice.

A wiper blade 14 is provided at the upper end of the rotary container 1, extends from the center of the rotary container 1 to the outside in the centrifugal direction, and is fixed at one end to a support 15 hanging from the base 5.

A fine stepped portion 14 is formed on the lower end side of this wiper blade 14.
a is formed, the upper side 14b lightly contacts the upper end of the rotating container 1, and the lower side 14C is located at a position slightly sunken below the surface of the molten solder 2.

Further, the wiper blade 14 has an elongated stop hole 16, 16 so that the wiper blade 14 can be moved up and down slightly relative to the support column 15.

Reference numeral 17 denotes a fan-shaped stopper fixed to the free end of the wiper blade 14 (that is, the end located at the center of the rotating container 1).
Used for depth adjustment.

This stopper 17 is also configured to be movable up and down relative to the wiper blade 14.

A temperature sensor 19 is fixed to the free end of the wiper blade 14 like the stopper 17, and appropriately turns on and off the power to the sheathed heater 13 in order to keep the temperature of the molten solder 2 constant.

Reference numeral 20 denotes a bottle-shaped slag storage case provided on a part of the upper circumferential side of the rotary container 1, which lightly contacts the eaves 1a of the rotary container 1, and is supported by legs 21 and 22 vertically installed on the base 5. Fixed.

23 is a control box provided inside the base 5;
24 is a control panel.

The above is the structure of the conventional device, and the operation of this device will be explained below.

First, after storing solid solder in the rotary container 1, when the power switch is turned on, power is supplied only to the sheathed heater 13.

When the temperature of the solder rises and all the solder melts, the motor 11 starts rotating in response to a command from the temperature sensor 19.

When the motor 11 rotates, the rotating container 1 also rotates in the direction of the arrows in FIGS. 1 and 3, and the molten solder 2 also rotates in the same direction.

In this state, as shown in FIG. 2, the operator grasps the object 18 to be soldered and pushes it into the molten solder 2 (solder is not shown in FIG. 2) until its lower end abuts the stopper 17. When the solder is submerged in water, the solder adheres to the object 18 to be soldered and fried.

At this time, the flux attached in advance to the object 18 to be soldered, the oxide of the solder oxidized by this flux, etc. float to the surface of the molten solder 2.

These slags 2 floating on the surface of the molten solder 2
5 rotates together with the molten solder 2, comes into contact with the lower end side of the wiper blade 14, and is discharged out of the rotating container 1 along the wiper blade 14 together with the centrifugal force.

As shown in FIG. 4, the wiper blade 14 is slightly submerged in the molten solder 2, but the large surface tension of the solder causes the molten solder 2 itself to sink into the wiper blade
4 will not be scooped up, and only the slag 25 with a small specific gravity will be scooped up.

These slags 25 are then stored in a slag storage case 20.

As shown in FIG. 1, the control panel 24 is equipped with a temperature adjustment dial 26 and a dial 27 for varying the rotation speed of the rotating container 1.
By operating 6.27, the temperature and rotation speed of the molten solder 2 can be changed and adjusted.

The conventional device as described above has the advantage that the slag 25 generated on the molten solder 2 is immediately and automatically discharged from the container by the wiper blade 14.

However, it also had the following drawbacks.

This is a measure to be taken when it is found that the sheathed heater 13 is disconnected while the solder 2 has solidified and become solid.

It is usually known whether the sheathed heater 13 has broken or not only after the temperature of the solder 2 becomes low and begins to solidify.

Therefore, when the sheathed heater 13 is embedded in the solder 2, the solder 2 is solid, so the sheathed heater 13 cannot be pulled out as it is and cannot be replaced.

Therefore, the solder 2 was heated from the outside with an acetylene burner or the like, and the sheathed heater 13 was pulled out after being melted and liquefied. However, since the rotary container 1 is covered with a heat insulating material 3, the solder 2 is easily removed. does not liquefy.

Furthermore, acetylene burners are not a commonly used device, and are usually not equipped in all places where soldering is performed.

Therefore, if the sheathed heater 13 is disconnected, the solder melting device may not be usable for a long period of time.

The present invention was made in view of the drawbacks of the conventional example,
One embodiment will be explained below with reference to FIG.

A feature of the present invention is that the sheathed heater is equipped with a wire breakage detection means and a means for notifying the wire breakage state, and the mechanical structure is the same as the conventional example, so a description of this structure will be omitted.

In the figure, SWI is a main switch, and one conductive line thereof is connected to one conductive line of the AC power supply 28 via a resistor R1.

Further, the other conductive line of the main switch SWI is connected to the other conductive line of the AC power supply 28 via the sheathed heater 13.

Furthermore, both terminals of the main switch SW1 are connected via a resistor R2.

29 is an amplifier, whose input terminal is the main switch SW1
and a resistor R1, and its output terminal is connected to a relay 31 that controls a switch SW2 of an alarm buzzer 30.

Note that a red lamp may be used instead of this alarm buzzer 30.

Further, a temperature sensor similar to the conventional example may be connected to the main switch SW1, and may be turned on and off as appropriate to keep the temperature of the solder constant.

In order to melt the solder in the embodiment of the present invention, it is sufficient to turn on the main switch SWI.

When the main switch SW1 is turned on, current from the power source 28 is applied to the sheathed heater 13, and this heater 1
3 generates fever.

Then, when not in use, the main switch SW1 can be turned off.

Even if the main switch SWI is turned off, the power supply 28
The current is applied to the sheathed heater 13 via the resistor R2, but the resistance value of this resistor R2 is set relatively large (
For example, if set to 1 or 2), the current flowing through the sheathed heater 13 will be small and it will not generate much heat.

When the main switch SW1 is in the on state,
Current flows through the main switch SW1 and, when in the off state, through the resistor R2.

Therefore, when the sheathed heater 13 is in a normal state, the potential on the input side of the amplifier 29 is low, and the amplifier 29 does not operate.

Here, if the sheathed heater 13 is disconnected, the potential at the input end of the amplifier 29 becomes high regardless of the state of the main switch SW1.

Therefore, the amplifier 29 and the relay 31 operate, the switch SW2 is turned on, and current is applied to the alarm buzzer 30.

There, it can be seen that the sheathed heater 13 is disconnected.

According to the present invention, when the sheathed heater is disconnected, the disconnection state is immediately detected and notified, so the sheathed heater can be pulled out of the container and replaced before the solder cools and solidifies.

Therefore, there is no need for a device such as an acetylene burner, and the sheathed heater, which is a consumable item, can be replaced in a short time, improving work efficiency.

Also, since current is constantly flowing through the heater via the resistor connected in parallel to the main switch, the state of the main switch (on or off) can be changed as long as it is connected to the power supply.
Regardless of the situation, the disconnection state of the heater can be automatically detected.

Therefore, by manual operation using a disconnection detection switch,
Compared to devices that detect wire breakage, the wire breakage condition can be detected earlier and more reliably, and the heater can be removed before the solder solidifies.

[Brief explanation of the drawing]

1 to 4 show a conventional example, and FIG. 1 is a perspective view;
2 is a sectional view, FIG. 3 is a plan view, FIG. 4 is a partial sectional view showing a wiper blade, and FIG. 5 is a circuit diagram showing an embodiment of the present invention.

Claims (1)

[Scope of Claim for Utility Model Registration] A solder melting device comprising a heating wire heater installed in a container in which solder is stored, and a wire breakage detecting means and a means for notifying a wire breakage state connected to the heater, comprising: 1. A solder melting device comprising: a main switch connected in series to a heater; a resistor connected in parallel to the main switch; and means for notifying a disconnection state connected in parallel to a heater.