JPH0541790Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a nozzle used in speed sprayers, boom sprayers, etc., and specifically relates to a nozzle whose discharge amount can be easily changed.

[Conventional technology]

Speed sprayers, boom sprayers, and the like are equipped with a large number of nozzles, and the amount of chemical liquid discharged from the nozzles must be changed depending on conditions such as the type and growth of the crop.

In conventional nozzles, a spout plate is prepared for each diameter of the spout, and the spout plate is detachably attached to the nozzle body by a cap. Therefore, in order to change the discharge amount, it is necessary to attach and detach the caps of many nozzles and replace them with spout plates of the desired diameter. It is necessary to manage the spout plate, and management becomes troublesome.

On the other hand, as described in Japanese Utility Model Publication No. 49-38569 and illustrated in Figs. 4 and 5, a spout plate has several nozzles a, b, and c of different shapes arranged around its periphery. d, the spout plate d is pivotably mounted on the front surface of the nozzle body e, and a locking ball g is provided that is pressed by a spring f so as to protrude from the front surface of the nozzle body e. A locking recess h is provided on the back surface of the plate d at a position corresponding to each of the nozzles a, b, and c, and facing the locking sphere g.
The nozzle ports a, b, and c are arranged to face a liquid supply port i opened at the front surface of the nozzle body e.

[The problem that the idea aims to solve]

In the nozzle described in the above-mentioned Japanese Utility Model Publication No. 49-38569 and shown in FIGS. 4 and 5, the nozzle body e and the jet plate d are connected by a screw rod k provided at the lower part of the rotating shaft j. O
Although the ring 1 is interposed, there is a problem in maintaining watertightness, and if an attempt is made to improve watertightness, a problem remains in that rotational operation becomes difficult. Furthermore, mud and the like may enter through the nozzle not communicating with the liquid supply port i, which may adversely affect the watertightness between the nozzle body e and the spout plate d.

The purpose of this invention is to provide a nozzle that is small in size and has a simple structure, in which the discharge amount can be easily changed, and mud and the like can be prevented from entering from the nozzle in the standby position.

[Means to solve the problem]

The nozzle according to this invention includes a spray plate 10 having a plurality of spray ports 12a, 12b, 12c, and 12d with different diameters at equal angular intervals, and a through hole 3 communicating with a chemical liquid passage.
0, and is arranged on the back side of the spout plate 10, and has a recess 40 and the through hole 3 on the end surface on the side of contact with the spout plate 10.
0 opening of the plurality of nozzles 12a, 12b,
An inner body 24 formed at angular intervals equal to the angular intervals of 12c and 12d, and the spout plate 10
The outer body 18 has a locking portion 50 that locks the outer body 18.
a cap 46 fixed to the body; a body resilient body 28 disposed between the inner body 24 and the outer body 18 and urging the inner body 24 toward the spout plate 10; The spray plate 10 is
Nozzles 12a to 12d communicating with the outlet 30 of
Ball 4 that is urged into contact with the back edge of the spout other than the
2.

[Effect]

To change the discharge amount, push the jet plate toward the inner body. The inner body is pushed toward the outer body against the body projectile, and the spout plate is released from the locking portion of the cap and becomes rotatable. The jet plate is rotated to a rotational position where the jet port having a diameter corresponding to the desired discharge amount is aligned with the through hole of the inner body, and the pressing of the jet plate is released. Thereafter, the spray plate is pressed against the locking portion of the cap via the inner body by the body projecting body, and is locked to the locking portion, thereby being restrained from rotating.

The chemical liquid that is pressure-fed through the chemical liquid passage passes through a hole in the inner body and is ejected from a nozzle located at the tip of the hole.

The nozzle of the spout plate, which is not aligned with the through hole of the inner body, is located at a position corresponding to the recess of the inner body, and the ball is urged by the ball bullet in the recess to block the nozzle.

〔Example〕

This invention will be described below with reference to embodiments shown in the drawings.

FIG. 2 is a plan view of the spout plate 10, which has a plurality of (four in the illustrated embodiment) nozzles 12a, 12b, 12c, and 12d with different diameters at equal angular intervals in the circumferential direction. , the circumference of the spout plate 10 is provided with so that when the operator grasps it with his or her fingers, the operator's fingers do not slip.
A knurling 14 is formed.

FIG. 1 is a sectional view of the spout plate 10. A flange 16 is formed at the lower edge of the circumference of the spout plate 10 .
The outer body 18 has a through hole 20 that communicates with a chemical liquid passage (not shown), and a recess 22 with a large diameter that communicates with the through hole 20. Inner body 2
4 is fitted at its base 26 into the recess 22 of the outer body 18 so as to be slidable in the axial direction and integrally fitted in the circumferential direction, and has a compression coil spring 28 for the body.
is the bottom surface of the recess 22 and the base 2 of the inner body 24.
6, and the inner body 24 is connected to the spout plate 1.
Press toward 0. The through hole 30 is connected to the inner body 2
4 in the axial direction, and has an enlarged portion 32 with an increased diameter on the spout plate 10 side.

Small protrusions (not shown) that can be hooked to both ends of the compression coil spring 28 for the body are formed at the portions of the inner body 24 and the outer body 18 that contact the compression coil spring 28 for the body. and outer body 1
Rotation relative to 8 is prevented.

FIG. 3 is an enlarged view of the area including the extension portion 32. As shown in FIG. The core 34 is disposed within the expanded portion 32, and the packing 36 is disposed between the upper edge of the core 34 and the spout plate 10 to fix the core 34 within the inner body 24, and Prevents liquid leakage from the inside to the outside. The O-ring 38 is fitted into a circumferential groove on the end surface of the inner body 24 on the outside of the expanded portion 32, and maintains liquid tightness against relative rotation between the jet plate 10 and the inner body 24 in the circumferential direction.

In FIG. 2, one or more (=the number of nozzles in the spout plate 10 - 1) recesses 40 are formed in the end surface of the inner body 24 on the spout plate 10 side. The expanded portion 32 and the plurality of recesses 40 are the nozzle 12a of the spout plate 10,
They are formed on the end surface of the inner body 24 on the spout plate 10 side at angular intervals equal to the angular intervals of 12b, 12c, and 12d. Therefore, the spout 12a of the spout plate 10,
Any one of 12b, 12c, 12d is the through hole 30
When the expansion portion 32 is in communication with the expansion portion 32 , the other portion is mated with the respective recess 40 . In the rotational position of the spout plate 10 shown in FIG. 1, the spout 12a is aligned with the expanded portion 32.

In FIG. 1, each recess 40 is provided with a ball 42 and a compression coil spring 44 for the body, and the ball 42 is elastically brought into contact with the back edge of the nozzle 12b, 12c or 12d by the compression coil spring 44 for the body. It is attached and forced to block it. The retaining cap 46 has a thread 48 formed on its inner periphery, and has an inner protruding edge 50 at its upper end that can be engaged with the flange 16 of the spout plate 10. After inserting the spout plate 10 into the central opening of the retaining cap 46, the retaining cap 46 is screwed onto the outer body 18 with the screw 48.
The O-ring 52 is fitted into an annular groove on the outer periphery of the base 26 and maintains air-water tightness against relative sliding between the outer body 18 and the inner body 24 in the axial direction.

The operation of the embodiment will be explained.

When changing the discharge amount, push the jet plate 10 toward the inner body 24. The inner body 24 is moved against the outer body 18 against the compression coil spring 28 for the body.
is pushed into the recess 22 of the spray plate 10, and the flange 16 of the spout plate 10 is separated from the inner projecting edge 50 as a locking part of the retaining cap 46. Since the inner body 24 and the outer body 18 are prevented from rotating relative to each other via the body compression coil spring 28 by small protrusions formed on opposing surfaces, the relative rotation of the spout plate 10 and the inner body 24 is prevented. becomes possible. As a result, the spout plate 10 is attached to the retaining cap 4.
The locking by the inner overhanging edge 50 of 6 is released and rotation becomes possible. The spout plate 10 is rotated relative to the inner body 24 until the spout plate 10 is rotated relative to the inner body 24 until the spout port 12a, 12b, 12c, or 12d having a diameter corresponding to the desired discharge amount is aligned with the through hole 30 of the inner body 24.
Release the 0 push. After this, the spout plate 10
The flange 16 is pressed against the inner overhanging edge 50 of the retaining cap 46 via the inner body 24 by the body compression coil spring 28, and is locked to the inner overhanging edge 50, thereby restraining rotation.

The chemical liquid that is force-fed from the chemical liquid passage through the through hole 20 and the recess 22 passes through the through hole 30, and passes through the nozzle 12a located at the enlarged part 32 at the tip of this through hole 30.
It ejects from either 12b, 12c or 12d.

Nozzle ports 12a, 12b, 12c, or 1 of the spout plate 10 that are not aligned with the through holes 30 of the inner body 24
2d is located at a position corresponding to each recess 40 of the inner body 24, and in each recess 40, the ball 42 is biased by a compression coil spring 44 for the body to close the nozzle 12a, 12b, 12c, or 12d. This prevents foreign matter such as mud from entering the back side of the spout plate 10 through the spout 12a, 12b, 12c, or 12d that is not aligned with the expanded portion 32.

[Effect of idea]

In this way, according to this invention, a plurality of nozzles with different diameters are formed on the spout plate, and by pushing the spout plate, the lock between the spout plate and the cap is released, and the spout plate is moved against the inner body. Rotate to change the nozzle that communicates with the through hole of the inner body, and change the discharge amount of the nozzle. Therefore, the effort of attaching and detaching the cap and replacing the spray plate is eliminated, and the work of changing the discharge amount of the nozzle becomes extremely easy.

With this invention, the structure is simple because the structure in which the inner body and the outer body as the main body rotate with respect to the shaft member that supports the nozzle, and the rotation with respect to the shaft member can be omitted. As the size increases, it also becomes smaller.

In this design, the nozzles of the spout plate that are not aligned with the through holes of the inner body are aligned with the recesses of the inner body, and in these recesses, the ball that receives the elastic force from the body projectile is transferred to the spout plate. Since the spout is urged into contact with the rear mouth edge of the nozzle and the nozzle is blocked, foreign matter such as mud is prevented from entering the back side of the spout plate through the nozzle that is not aligned with the through hole of the inner body. Ru.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the spout plate 1 of this invention, Fig. 2 is a plan view of the spout plate, Fig. 3 is an enlarged view of the area including the expanded portion, and Figs. 4 and 5 are of the conventional example. They are a sectional view and a plan view. 10... Spout plate, 12a, 12b, 12c, 12
d... Nozzle, 18... Outer body, 24... Inner body, 28... Compression coil spring for body (bullet body for body), 30... Through hole, 40... Recess, 42... Ball, 44... ...compression coil spring for the body (bounce body for the body), 46... retaining cap, 50... inwardly projecting edge (locking part).

Claims (1)

[Scope of claims for utility model registration] (1) Multiple nozzles 12a, 12b, 1 with different diameters
A spout plate 10 having 2c and 12d at equal angular intervals,
The spout plate 1 has a through hole 30 that communicates with the chemical liquid passage.
A recess 40 and an opening of the through hole 30 are disposed on the back surface side of the spout 10 and the end surface on the contact side with the spout plate 10 is provided with a recess 40 and an opening of the through hole 30.
An inner body 24 formed at angular intervals equal to the angular interval of 2d, a cap 46 having a locking portion 50 for locking the spout plate 10 and fixed to the outer body 18, and the inner body 2
4 and the outer body 18, and urges the inner body 24 toward the spout plate 10, and the respective recesses 4.
a spout (12
A nozzle characterized in that it has a ball 42 that is urged into contact with the back edge of the nozzle other than any one of the nozzles (a to 12d). (2) The nozzle according to claim 1, wherein the cap 46 is screwed onto the outer body 18. (3) The nozzle according to claim 1 or 2, wherein the locking portion 50 is an inwardly projecting edge of the cap 46.