JPH072058Y2 - Intermittent spray gun - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an intermittent spray gun which is improved by intermittently spraying to prevent excessive spraying of liquid.

[Conventional technology and technical problems to be solved]

Textile products tend to be soiled and lose their value once attached. When a large number of such textile products have partial stains or stains, a means to remove the stains by spraying an organic solvent or the like in spots is sometimes used to remove them. Many,
The conventional organic solvent spraying means is a type that continuously sprays the organic solvent by electric force when the trigger switch is turned on, so the spraying solvent per time is difficult to adjust and the minimum required amount may greatly exceed. As a result, the amount of organic solvent used is too large, which is uneconomical, and the worker inhales a large amount of the components produced by the organic solvent while processing a large amount of objects to be cleaned, which is harmful to health. Was invited.

The present invention has been made in view of the above-mentioned problems in conventional organic solvent spraying, and a spraying means for preventing excessive solvent spraying by intermittently spraying the organic solvent is provided. It is a technical issue to provide.

[Means adopted for solving the problem] Means adopted by the present inventor for solving the above problems will be described below with reference to the accompanying drawings.

That is, in the spray gun that sprays a predetermined liquid agent from the spray nozzle 1 by driving the pump 2, the intermittent power supply circuit 3
Is provided to intermittently supply power to the pump 2 to intermittently spray the solvent, prevent excessive solvent spraying, and reduce the solvent spray amount to reduce the solvent volatile component suction by the worker. It provided an intermittent spray type spray gun capable of

〔Example〕

The present invention will be described below with reference to the embodiments shown in FIGS. 1 and 2. In addition, FIG. 1 is a cross-sectional side view of the main part of this embodiment,
FIG. 2 is a circuit diagram.

This embodiment is composed of a spray gun main body A which is substantially in the shape of a hand gun and a control box B which is connected to the main body A by a four-wire cord.
The alternating current of the voltage is used as the power source.

A 4-wire cord is pulled in behind the grip end of the spray gun body A. The four-wire cord is composed of two cords, one cord of which is two cords. One of the two cords in the cord is a trigger switch 32 built into the grip portion of the spray gun body A and a control. Box B
A gate electric circuit in a thyristor circuit 31, which will be described later and is built in, is connected. The other remaining cord set connects the coil-type electromagnet 21 built in above the trigger switch 32 and the cathode circuit in the thyristor circuit 31.

An iron swing arm 22 is arranged behind the coil-type electromagnet 21, and an adjustment stopper member 25 is arranged further behind. Further, a fixed stopper member 24 is also provided in front of the swing arm 22 and above the coil type electromagnet 21. The swing arm 22
It is pivotally supported at its lower end and is urged toward the adjustment stopper member 25 by a leaf spring 23, and the upper end of the arm 22 becomes a free end and a piston 27 in a cylinder 28 built in the barrel portion is used. Of the two stopper members that are connected to the pump 2 and sandwich the swing arm 22 that constitutes the pump 2, the adjustment stopper member that is arranged rearward.
25 is moved back and forth by a knob 26 protruding from the outside of the main body A.

The pump 2 is designed so that the inside of the cylinder 28 built in the barrel portion can be made negative pressure.
The pipe that drooped into the tank 4 due to the negative pressure inside
The solvent is sucked up into the cylinder 28 through 41.
The sucked-up solvent is pressure-fed to the spray nozzle 1 arranged at the tip of the barrel and is ejected.

The pump 2 is driven by the piston 27 moving back and forth, and the movement of the piston 27 is a coil type electromagnet.
The magnetic force of 21 is repeated and the swing arm 22 is electromagnetized.
It is obtained by attracting to the 21 side by magnetic force or returning to the rear by biasing force. This swing amplitude is adjusted by the position of the adjustment stopper member 25.

Further, since the coil-type electromagnet 21 is intermittently supplied with power, the magnetic force is repeatedly generated and deleted, and the pump 2 is driven.
For this intermittent power supply, the AC thyristor circuit 31 built in the control box B becomes the intermittent power supply circuit 3,
It is sent through a cord connected to the electromagnet 21.
Electricity sent from the cathode electric circuit of the AC thyristor circuit 31 repeats turn-on and turn-off while the gate current is flowing, so that intermittent power supply is obtained, whereby the magnetic force of the electromagnet 21 is repeated. The swing arm 22 swings, and the pump 2 is driven. This power supply output can be adjusted by turning the output adjustment knob and adjusting the variable resistor R ₉ provided in the thyristor circuit.

Now, two switches are provided in the gate circuit of the thyristor circuit 31 built in the control box B. One is a trigger switch 32 arranged in the spray gun main body A, and the other is an automatic disconnection switch 33 built in the control box B. Of these, the trigger switch 32 turns on / off the gate circuit via the above code.

The automatic connection / disconnection switch 33 includes a rectifier circuit 3A, an astable multivibrator circuit 3B, and a relay 3C. This automatic connection / disconnection switch 33 alternately passes the DC electricity sent to the astable multivibrator circuit 3B by the rectifier circuit A to the two transistors of the astable multivibrator circuit 3B, which can be visually recognized by the light emitting diodes LED1 and LED2. On the other hand, the relay 3C turns on the gate circuit when current is flowing through one of the transistors (transistor TR2), and turns off the gate circuit when current is not flowing through this transistor TR2. In this way, the automatic connection / disconnection switch 33 automatically repeats connection / disconnection of the gate circuit.

Therefore, when the trigger switch 32 is turned on, the automatic disconnection switch 33 automatically repeats on / off, and when the automatic disconnection switch 33 is on, the coil type electromagnet 21 is magnetized by the current in the cathode circuit of the AC thyristor circuit. The swing arm 22 vibrates by repeating excitation and disappearance, and the solvent is sprayed from the spray nozzle 1. On the contrary, an automatic disconnection switch
When 33 is off, spraying is discontinued. In this way, the intermittent spray type spray gun in this embodiment intermittently sprays the solvent.

In addition, in front of the control box B, the light emitting diode
Use the dial provided below LED1 · LED2, by adjusting the two variable resistors R ₇ · R ₈ in the astable multivibrator circuit 3B, on-time and off-time of the automatic disengaging switch 33 is adjusted .

Although the present embodiment is as described above, the present invention is not limited to the above embodiment, various modifications are possible within the scope of the utility model registration claim, and the tank and the automatic disconnection switch are It is of course possible to make it integrally with the spray gun body or to make it separately, and it is also possible to take a form in which the liquid agent is sucked up from Isto-kan etc. without providing the spray gun with a tank. Further, the intermittent feeding circuit can be obtained by another type of circuit configuration, and for example, a photocoupler or the like can be used instead of the relay.

[Effect of the present invention]

As described above with reference to the embodiments, in the present invention,
Since the spray gun automatically intermittently sprays, it is easier to adjust the amount of solvent sprayed compared to the conventional device that continuously sprays solvent, and therefore it is possible to prevent excessive spraying of solvent,
It is economical. Also, since the amount of solvent sprayed is small, the amount of solvent volatile component suctioned by the operator is naturally small, which leads to improvement of the working environment.

Thus, the intermittent spray type spray gun of the present invention has high industrial utility value.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional side view of essential parts of an embodiment spray gun of the present invention, and FIG. 2 is a circuit diagram of the embodiment gun. A: spray gun body, B: control box, 1
... atomizing nozzle, 2 ... pump, 21 ... coil type electromagnet, 22 ...
Swing arm, 23 ... Leaf spring, 24 ... Fixed stopper member, 25
… Adjustment stopper member, 26… Pickle, 27… Piston, 3…
Intermittent power supply circuit, 31 ... thyristor circuit, TH1 ... thyristor, D2 ... diode, R6 ... resistor, R9 ... variable resistance, 32 ... trigger switch, 33 ... automatic connection / disconnection switch, 3A ... rectifier circuit, D1 ... diode, C1, C2 … Capacitor, R1… Resistor,
T1 ... Transformer, 3B ... Astable multivibrator circuit, R2 ・
R3 / R4 / R5 ... Resistor, R7 / R8 ... Variable resistance, C3 / C4 ... Capacitor, LED1 / LED2 ... Light emitting diode, TR1 / TR2 ... Transistor, 3C ... Relay, 4 ... Tank, 41 ... Tube.

Claims (1)

[Scope of utility model registration request] 1. A spray gun for spraying a predetermined liquid agent from a spray nozzle 1 by driving the pump 2,
An intermittent spray-type spray gun, which is provided with an intermittent power supply circuit 3 for intermittently supplying power to the.