JPS5835331Y2 - airless paint machine - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a so-called airless coating machine that is not equipped with a compressor.

As disclosed in, for example, Japanese Utility Model Publication No. 53-15818, this type of coating machine uses a built-in armature of an electromagnetic device and a spring attached to the piston to cause the piston to reciprocate and communicate with the cylinder. It is capable of sucking up liquid from inside a container and spraying it in the form of mist through a nozzle attached to the tip of the cylinder.
Since it can be used without a compressor if connected to a commercial power source, it has advantages such as a simple configuration, a reduction in size and weight, and ease of handling.

However, the vibrations caused by the reciprocating motion of the piston are transmitted from the cylinder to the liquid suction pipe that hangs down inside the container, so the lower end of the suction pipe stirs the liquid in the container and generates micro air bubbles in the liquid. This may cause an inconvenience in that large spittles of liquid particles are ejected from the nozzle, and the spraying effect may be significantly deteriorated.

This idea was devised by focusing on these conventional problems, and involves inserting the upper end side of the liquid suction pipe, which is connected and fixed to the cylinder and suspended inside the container, through the case. By providing a flexible part between the piston and the suction pipe, and providing an elastic bushing at the part of the case where the suction pipe is inserted to sandwich the suction pipe, vibrations caused by the reciprocating movement of the piston are transmitted through the suction pipe. The object of the present invention is to provide an airless sprayer that suppresses agitation of liquid in a container, thereby improving the spraying effect.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

A solenoid coil 2 fixed to the main body 1 is provided with an armature 3 to form an electromagnetic device, and by applying an alternating current voltage to the solenoid coil 2, the armature 3 can make an amplitude motion in an arc with its upper part as a fulcrum. 1, a cylinder 4 is buried in the same direction as the amplitude movement direction of the armature 3, a piston 5 is inserted into the cylinder 4 from the rear of the cylinder 4, and a spring 6 is elastically installed on the cylinder 4 side and the piston 5 side. , the piston 5 is enabled to reciprocate within the cylinder 4 in cooperation with the armature 3 by the elastic compression action of the spring 6, and a cylinder 7 is formed to protrude from the main body 1 on the same axis as the cylinder 4. There is a threaded part 8 on the outer periphery of the tip side.
At the same time, a liquid suction port 9 is formed at the lower side of the main body 1 in communication with the cylinder 4.

A valve cone 10 with a valve action lath is provided on the tip side of the cylinder 4.
is brought into close contact with the cylinder 4 by the elastic action of the spring 11, and the threaded portion 8 of the cylinder body 7 located on the tip side of the cylinder 4
The nozzle 12 is screwed and fixed to the holder.

A suction pipe 13 is fixed to a liquid suction port 9 formed in the cylinder 4.

The entire movable part 14 of the pump, including the electromagnetic device formed by the solenoid coil 2 and the armature 3, as well as the cylinder 4 and piston 5, is covered by a left case 16 and a right case 17, which are vertically divided into two parts and have a grip 15. When the cases 16.17 are connected with the screws 18, the pump body 1 is fixedly disposed inside the case 16.17 via the buffer member 19, and the case 16.17 has a container 20 for storing liquid. case 16.17.
A suction pipe 13 is inserted into the container 20 through semicircular notches 21 and 22 formed at the bottom thereof, and is housed in the container 20, and a suction pipe 13 is disposed in a housed state. A switch 23 for applying and cutting off voltage is provided in a protruding manner.

The suction pipe 13 has an upper end connected and fixed to the suction port 9 formed in the cylinder 4, and a portion inserted through the semicircular notch 21.22 formed at the bottom of the case 16.17. , a bellows-shaped flexible portion 24 is provided to constitute a vibration absorbing or vibration damping structure.

In addition, semicircular notches 21 and 22 formed at the bottom of the case 16 and 17 where the suction pipe 13 is inserted are provided with semicircular bushings 25 and 26 made of elastic material such as rubber and having a U-shaped cross section. Suction pipe 1 through bushing 25.26
3 is configured to be held between cases 16 and 17.

In such a configuration, by applying voltage to the electromagnetic device via a cord (not shown), the amateur 3
The piston 5 is reciprocated within the cylinder 4 along with the compression stroke of the spring 6 through the suction port 9.
The liquid is drawn up from the container 20 through the suction pipe 13, the valve cone 10 is opened and closed by the valve action caused by two compression strokes of the spring 11, and the liquid is sprayed from the nozzle 12, thereby performing a spraying operation.

At this time, the vibration due to the reciprocating movement of the piston 5
It is transmitted to the suction pipe 13 which is connected and fixed to the suction port 9 of the case 16.
The bushing 2 is sandwiched between the bushings 25 and 26 provided in the bushing 22, and is connected and fixed to the suction port 9 of the suction pipe 13.
5. Flexible part 24 between the parts held down by 26
Since the vibration is absorbed or attenuated by the flexible portion 24, and the lower part of the flexible portion 24 is suppressed by bushings 25 and 26, the vibration is located inside the container 20. It almost never reaches the lower end of the suction pipe 13, so that the suction pipe 13 is connected to the container 20.
This eliminates the need to stir the liquid inside, and eliminates the generation of micro air bubbles in the liquid and the spraying of Spitz caused by this, unlike conventional devices, and the spraying effect can be significantly improved.

In addition, since the structure suppresses the transmission of vibrations to the lower end side of the suction pipe 13, the suction pipe 13 is connected to the container 20 as in the conventional device.
The noise that was generated when stirring the liquid has also been eliminated.
This makes it possible to create an airless paint sprayer that has extremely high practical value and is expected to have a significant effect on improving the working environment during spraying operations.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the main parts showing an embodiment of the airless paint sprayer, Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1, and Fig. 3 is an explanatory diagram of the main parts of the airless paint sprayer. be. 1: Main body, 2: Solenoid coil, 3: Amateur, 4
Nijilinda, 5: Piston, 9: Suction port, 12: Nozzle, 13: Suction pipe, 14: Movable part, 16, 17: Case, 20: Container, 24: Flexible part, 25, 26: Bushing.

Claims (1)

[Scope of utility model registration request] An electromagnet and an armature are housed inside the left and right cases, and the swinging motion of the armature due to the excitation of the electromagnet is converted into the reciprocating motion of a piston that engages with the armature and penetrates the cylinder, and can be screwed and hung from the case. In an airless paint sprayer that sucks up liquid in a container and sprays it from a nozzle, an upper end side is connected to the cylinder side, and a lower end side is inserted through the case and into the container to suck up the liquid. The airless coating machine is characterized in that a flexible portion is provided between the upper end side and a portion that passes through the case, and the flexible portion is held in the case by a bushing.