JPH0128851Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a so-called airless sprayer that is not equipped with a compressor for spraying liquid, paint, etc., and particularly to an improvement in the discharge pressure adjustment structure of the airless sprayer.

To explain a general airless sprayer with reference to FIG. 6, a solenoid coil 2 is housed in a housing 1, an armature 3 is disposed in the solenoid coil 2, and a switch 5 is disposed in a grip 4 vertically disposed on the housing 1. By the operation of the switch 5, an alternating current voltage is applied to the solenoid coil 2 to enable the armature 3 to reciprocate, and a cylinder 6 is arranged on the front side of the housing 1 facing the direction of the reciprocating motion of the armature 3. The sleeve-shaped housing 1a in which is embedded is fixed to the housing 1 with a set screw 7, the piston 8 is inserted into the cylinder 6, and the ammunition 9 is interposed between the cylinder 6 and the piston 8. A piston 8 can move reciprocally within the cylinder 6 by cooperating with the end of the armature 3 due to the elastic force, and a lid 10 is formed on the lower side of the housing 1a to accommodate a liquid, paint, etc. 11 is suspended, and a suction hole 12 and a discharge hole 13 are formed in the housing 1a, the lid 10, and the cylinder 6 to communicate the inside of the cylinder 6 and the inside of the container 11,
The upper end of the suction pipe 14 is inserted into the suction hole 12 of the lid 10, and the strainer 15 is inserted into the lower end of the suction pipe 14.
has been set up. Further, a valve 16, a bullet 17, and a nozzle 18 are arranged on the tip side of the housing 1a and are screwed and fixed with a nozzle holder 19, and a housing 1b that covers the solenoid coil 2, armature 3, etc. is fixed to the housing 1 with screws 20. The housing 1b is provided with an adjuster 21 that adjusts the reciprocating distance of the armature 3 to adjust the state of the mist of liquid, paint, etc. sprayed from the noise 18.

Therefore, the liquid, paint, etc. in the container 11 passes through the suction pipe 14 due to the pump action of the suction/compression process generated by the reciprocating movement of the armature 3 and the piston 8 in relation to the bullet 9 of the solenoid coil 2. is sucked into the cylinder 6, and along with the compression operation of the piston 8, the valve 16 opens the open end 22 of the cylinder 6 against the force of the bullet 17, and the open end 22
The water passes through the nozzle 18 and is sprayed from the ejection hole 18a of the nozzle 18.

By the way, as described above, in this type of sprayer, the armature 3 is reciprocated by applying an alternating current voltage to the solenoid coil 2, so that the armature 3 directly collides with the regulator 21 due to this reciprocating motion. For example, when spraying continuously for a long period of time, the threaded state may change, and this may affect the operation of the armature 3. This may lead to inconveniences such as fluctuations in the stroke. In that case, in the conventional discharge pressure adjustment structure, a locking portion 25 having an L-shaped cross section is projected from the circumferential surface of the regulator 21 to form a locking groove 26, and a locking groove 26 is formed between the locking groove 26 and the inner wall of the housing 1b. A coil spring 27 is resiliently installed, and the resilient force of the coil spring 27 strengthens the threaded state of the threaded portion 23 and the threaded hole 24, thereby preventing the loosening phenomenon of the adjuster 21. Therefore, the outer diameter dimension A of the locking portion 25 for locking the coil spring 27 and the outer diameter dimension of the coil spring.
A' becomes larger than the outer diameter dimension B of the adjuster 21,
Also, the range C becomes larger, and the housing 1,
The size of 1b is relatively large, making it inconvenient to handle and subject to restrictions in terms of external design.

In view of the above circumstances, the purpose of the present invention is to provide an airless sprayer that can solve the above problems by reducing the outer diameter of the locking part of the elastic member such as a spring. In a device in which the range of reciprocating movement of the armature due to the applied voltage of the solenoid coil is adjusted by the degree of screwing of an adjuster screwed into the housing, a screw is attached to the circumferential surface of the adjuster at an appropriate position in a direction substantially perpendicular to the axial direction of the adjuster. It is provided with a resilient member that presses against the outside.

Next, a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. Reference numeral 31 is a housing housing a solenoid coil 32, and an armature 33 is disposed in the solenoid coil 32.
34 is a grip installed vertically on the housing 31, and a switch 35 is attached to a part of this grip 34.
is provided, and by operating the switch 35, an alternating current voltage is applied to the solenoid coil 32, thereby enabling the armature 33 to reciprocate in the front and rear directions. 31a is a sleeve-shaped housing fixed to the front side of the housing 31 with a set screw 36, and a cylinder 37 is disposed in the front-rear direction. 38 is a piston that penetrates the cylinder 37, and the cylinder 37 and the piston 3
A piston 38 is formed so as to be able to reciprocate within the cylinder 37 by interposing an ammunition 39 between the armature 33 and the armature 33 via an ammunition 39. 40 is the housing 31
It is a lid body integrally formed on the lower end side of the
A container 41 containing paint or the like is suspended by a threaded portion 42 . 43 is the housing 31 and the lid 4
0 and cylinder 37 are suction holes formed, and 44 is a similarly formed discharge hole, and the upper end of a suction pipe 46 having a strainer 45 at the lower end is inserted into the suction hole 43 of the lid 40. ing. Reference numeral 47 denotes a valve 4 disposed on the tip side of the housing 31a.
8. A nozzle holder for fixing the bullet 49 and the nozzle 50, and this nozzle holder 47 is screwed onto the tip of the housing 31a. 31b is a housing that covers the solenoid coil 32, armature 33, etc., and is fixed to the housing 31 with screws 52. 53 is the housing 31b
This is an adjuster disposed in the armature 33 and defines the reciprocating range of the armature 33. Therefore, the armature 3 associated with the solenoid coil 32 and the ammunition 49
Due to the suction/compression process caused by the reciprocating movement of the piston 38 and the piston 38, the liquid, paint, etc. in the container 41 is sucked into the cylinder 37 through the suction pipe 43, and as the piston 38 performs the compression operation, the valve 48 closes the cartridge 49.
The open end 54 of the cylinder 37 is opened against the force of , and the liquid passes through the open end 54 and is sprayed from the injection hole 55 of the nozzle 50 .

By the way, in the discharge pressure adjustment structure of the first embodiment, the screw portion 56 of the adjuster 53 is screwed into a screw hole 57 formed in the housing 31 and fixed to be adjustable.
A buffer member 58 made of rubber or the like is disposed at the end of the threaded portion 56 on the armature 33 side, and a knob 59 of the adjuster 53 is provided.
protrudes outward from the housing 31b from a hole 60 formed in the housing 31b. A groove 61 such as a knurl is formed in the inner part of the housing 31b on the outer peripheral surface of the adjuster 53.
A plate spring 63, which is a resilient member having a protrusion 62 that engages with the groove 61, is fixed to the lower housing 31 of the adjuster 53. It was pressed from both sides. Therefore, the screw portion 56 and the screw hole 5
Even if vibrations are applied to the screwed part with the plate spring 63, the screwed state can be maintained due to the elastic force of the leaf spring 63. Furthermore, in the above embodiment, the degree of screwing of the adjuster 53 is adjusted while the numerous grooves 61 formed on the outer circumferential surface of the adjuster 53 and the protrusions 62 of the leaf spring 63 are engaged with each other, so that rattling is suppressed. At the same time, the adjustment work can be easily performed. In addition, the outer diameter A'' of the portion where the groove 61, which is the engagement portion of the leaf spring 63, is formed is only slightly larger than the outer diameter B of the adjuster 53, and its range C is also shorter. The dimensions of the housings 31, 31b are relatively small and compact, making them less susceptible to design restrictions and easier to manufacture.

FIG. 4 shows the discharge pressure adjustment structure of the second embodiment,
To explain using the same reference numerals for the same parts as in the first embodiment, the screw part 56a and the knob part 59a of the adjuster 53a.
and the engagement portion 64 with the elastic member are each constructed separately, and the adjuster 53a is connected to the housing 3.
The armature 3 of the screw portion 56a is screwed into the screw hole 57 formed in the screw hole 57 and fixed so as to be screwable and adjustable.
A buffer member 58 made of rubber or the like is provided at the third side end. The threaded portion 56a has an engaging portion 66 extending in the axial direction on the circumferential surface thereof with a plurality of convex stripes 65 extending in the axial direction of the adjuster 53a. A ring-shaped engagement part 64 provided with a protruding part 65a that engages with the protruding part 65
is externally fitted, and the engaging portion 66 is attached to the housing 31b.
A knob 59a protrudes outward from the housing 31b from a hole 60 formed in the housing 31b, and has the grooved portion 65a provided at the engaging portion 66 from the outside of the housing 31b.
is externally fitted, and the end of the knob 59a is abutted against the engaging portion 66. A stopper 67 is formed at a suitable location on the outer peripheral surface of the engaging portion 66, and a stopper 67 that engages with the stopper 67 on the housing 31 side.
a is formed, and the gripping portion 59a and the engaging portion 66 are set in a state in which the engagement portions 67 on both sides are disengaged.
are connected by screws 68. A large number of grooves 61 are formed on the outer circumferential surface of the engaging portion 66, and protrusions 62a that press the outer circumferential surface of the engaging portion 66 from the outside are disposed in the housing 31 via springs 63a. The protrusion 62a, which is an elastic member, is pressed into contact with the elastic member 63a from the outside in a direction substantially orthogonal to the axial direction of the adjuster 53a. Therefore, by rotating the knob 59a, the threaded portion 56a rotates through the engagement between the protruding portion 65 and the concave portion 65a, and the distance between the armature 33 and the buffer member 58 is varied. A reciprocating range is defined.
In that case, for example, if the grip portion 59a is rotated due to an erroneous operation, the screw portion 56a will move due to the engagement between the protruding portion 65 and the recessed portion 65a, and the initially set stroke of the armature 33 will change.
The armature 67, 67a engages within one rotation and prevents rotation beyond the rotation of the adjuster 53a, so the stroke of the armature 33 can be readjusted to the initial setting position by rotation operation within one rotation. . In addition, the threaded state of the threaded portion 56a and threaded hole 57 is strengthened by the pressure exerted by the protrusion 62a and the bullet 63a,
This can prevent the adjuster 53a from loosening. In this case, the outer diameter dimension A'' of the engaging portion 64 is only slightly larger than the outer diameter dimension B of the adjuster 53a, and its range C is also shorter.
The dimension b is relatively small and compact. In the first and second embodiments, a groove and a protrusion that engages with the groove are formed in the engaging portion, but it is sufficient to provide a member that simply presses from the outside without providing these.

As described above, the present invention adjusts the reciprocating range of the armature due to the applied voltage to the solenoid coil housed in the housing by adjusting the degree of screwing of the adjuster screwed onto the housing. Since it is equipped with an elastic member that presses from the outside in a direction substantially perpendicular to the axial direction of the adjuster, the outer diameter of the locking part of the elastic member can be reduced, making it compact and easy to handle. This has great effects as it is less subject to design constraints and is easier to design and manufacture.

[Brief explanation of the drawing]

Figures 1 to 3 show the first embodiment of the present invention; Figure 1 is an overall sectional view, Figures 2 and 3 are sectional views of essential parts, and Figures 4 and 5 are the second embodiment. FIG. 6 is a sectional view of a conventional example. 31... Housing, 32... Solenoid coil, 33... Armature, 53, 53a... Adjuster, 63... Leaf spring, 62a... Protrusion, 63a...
...A bullet machine.

Claims (1)

[Scope of utility model registration request] In a system in which the reciprocating range of the armature due to the applied voltage of a solenoid coil housed in a housing is adjusted by the degree of screwing of an adjuster screwed into the housing, a screw is attached at an appropriate position on the circumferential surface of the adjuster in the axial direction of the adjuster. An airless sprayer characterized by comprising a pressure member that presses from the outside in a substantially orthogonal direction.