JPH0628208Y2 - Lid for spray liquid tank of sprayer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a structure of a spray liquid tank lid mounted on a speed sprayer or the like, and more specifically, improved prevention of spray liquid leak from an air hole. The present invention relates to a spray liquid tank lid.

[Conventional technology]

The chemical liquid tank mounted on the speed sprayer has a charging port at the top, and the charging port can be opened and closed by a lid. Further, in order to smoothly suck the chemical solution in the chemical solution tank by the pump, it is necessary to maintain the chemical solution tank at the atmospheric pressure, and the lid is provided with an air hole for communicating the inside and outside of the chemical solution tank. . Further, since the speed sprayer climbs and descends on a slope, it is necessary to prevent the chemical liquid in the chemical liquid tank from leaking to the outside from the air hole despite the slope of the speed sprayer.

A conventional lid for a chemical tank (eg, Jikkai 61-125364
In Japanese Laid-Open Patent Publication No. 61-33665, etc.), an air hole is formed in the central portion of the lid so as to vertically penetrate, and a plate or the like is arranged below the air hole so as to be freely displaceable. When the chemical solution tries to flow back through the air hole,
The plate or the like is displaced by receiving the pressure from the chemical liquid and closes the air hole.

[Problems to be solved by the device]

To enumerate the problems of such a conventional lid with an air hole,
It is as follows.

(A) The plate or the like closes the air hole by the pressing force from the chemical liquid, but the pressing force from the chemical liquid is insufficient, and the plate or the like does not sufficiently adhere when the air hole is closed,
The chemical solution easily leaks to the outside through the air holes.

(B) The chemical liquid in the chemical liquid tank is constantly bubbling due to stirring by the stirring blades and vibration of the speed sprayer,
The plate or the like is less likely to be pressed by bubbles on the upper surface of the chemical liquid, and the foamed chemical liquid easily leaks from the air holes when the speed sprayer is tilted.

(C) When the speed sprayer keeps the chemical solution stored in the chemical solution tank in a substantially full state and continues spraying the chemical solution in an inclined posture, the air hole is closed by a plate or the like, so that the inside of the chemical solution tank is under negative pressure. Therefore, the suction efficiency of the pump decreases.

An object of the inventions of claims 1 to 3 is to overcome the above-mentioned problems (a) to (c), and reliably prevent the spray liquid from leaking to the outside of the spray liquid tank through the air holes. Another object of the present invention is to provide a lid for a spray liquid tank of a spray vehicle.

The purpose of the invention of claims 2 and 3 is to further simplify the structure.

[Means for Solving the Problems]

The invention will be described using the reference numerals of the drawings corresponding to the embodiments.

The cover (2) for the spray liquid tank of the spray vehicle (10) which is the premise of claim 1.
2) is provided with a spray liquid tank lid (22) which is provided on the spray liquid tank (24) for storing the spray liquid (20) so as to be openable and closable.
The spray liquid tank lid (22) according to the first aspect of the present invention has the following components (a) to (c).

(A) A plurality of air holes (52) formed on the peripheral wall at intervals in the circumferential direction to communicate the inside and outside of the spray liquid tank (24) (b) For the spray liquid tank corresponding to each air hole (52) A valve body (54) (c) that is provided to be freely displaceable in the radial direction of the lid (22) and that opens and closes the air hole (52) (c) Moves in relation to the inclination of the spray liquid (20) and is on the lower side in the inclination direction. A movable body (56) for seating the (54) in the air hole (52). In the spray liquid tank lid (22) of the spray vehicle (10) according to claim 2, the movable body (56) further comprises a spray liquid tank. It is movable in the radial direction of the cover (22) with respect to the center of the spray liquid tank cover, and the valve bodies (54) can be commonly operated.

The cover (2) for the spray liquid tank of the spray vehicle (10) which is the premise of claim 3.
2) is provided with a spray liquid tank lid (22) which is provided on the spray liquid tank (24) for storing the spray liquid (20) so as to be openable and closable.
The spray liquid tank lid (22) according to the third aspect of the present invention has the following components (a) and (b).

(A) In a spray vehicle (10) provided with a spray liquid tank lid (22) that is openably and closably provided on an upper part of a spray liquid tank (24) that stores the spray liquid (20), a circumferential wall of the spray vehicle (10) is circumferentially spaced. A plurality of air holes (5) that connect the inside and outside of the spray liquid tank (24).
2) (b) A valve body (54) provided corresponding to each air hole (52) to open and close the air hole (52) by displacing in the radial direction of the spray liquid tank lid (22) according to gravity. In the device of claim 1, when the spraying vehicle (10), and hence the spraying liquid tank (24) is tilted, the movable body (56) is also tilted downward in accordance with the tilt of the spraying liquid tank (24) according to its gravity. Move to. As a result, the valve body (54) on the lower side in the inclination direction is pushed toward the air hole (52) by the movable body (56) and closes the air hole (52). The spray liquid (20) in the spray liquid tank (24) squeezes toward the air hole (52) on the lower side in the tilt direction as the spray liquid tank (24) tilts, but the air from the valve body (54) Closing the hole (52) prevents the air hole (52) from leaking to the outside of the spray liquid tank (24). On the other hand, the valve body (54) on the upper side in the inclination direction is not pressed by the movable body (56) toward the air hole (52), so that the air hole (52) corresponding to the valve body (54) is The air hole (52) on the upper side in the inclined direction is kept in a state of communicating the inside and outside of the spray liquid tank (24).

In the invention of claim 2, each valve body (54) is a cover for the spray liquid tank.
It is operated by a common movable body (56) on the center side of (22). That is, the common movable body (56) moves downward in the inclination direction according to the inclination of the spray liquid tank (24), separates from the valve body (54) above the inclination direction, and moves downward from the valve in the inclination direction. Push the body (54) downwards. Therefore, the valve body (54) on the upper side in the inclination direction is
The air hole (52) is separated from the corresponding air hole (52), the air hole (52) is kept open, and the valve body (54) on the lower side in the inclination direction is
Is pressed against the air hole (52) by the movable body (56), and the air hole (5
2) Close.

According to the third aspect of the invention, each valve element (54) moves in the inclination direction of the spray liquid tank lid (22) in accordance with the inclination of the spray liquid tank (24) due to gravity applied to itself. Therefore, when the spray liquid tank (24) is tilted, the valve body (54) on the upper side in the tilt direction is separated from the air hole (52) corresponding to the valve body (54) to open the air hole (52) and the air hole (52). The atmospheric pressure in the spray liquid tank (24) is maintained at atmospheric pressure via Also, the valve body on the lower side in the tilt direction
(54) reaches the corresponding air hole (52) and closes the air hole (52) to prevent the spray liquid (20) from leaking from the air hole (52).

〔Example〕

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

FIG. 8 is a schematic side view of the speed sprayer 10. The speed sprayer 10 is provided with front wheels 12 and rear wheels 14 as driving wheels and is capable of traveling in the forward and backward directions. Further, the speed sprayer 10 includes, in order from the front side, a driver's seat 18 equipped with a steering wheel 16, a chemical liquid tank 24 that stores a chemical liquid 20 inside and a lid 22 that is openable and closable in a substantially upper center, an engine and a pump. An engine room 26 for accommodating mechanical parts such as (not shown), a nozzle head 30 in which a plurality of nozzles 28 for spraying the chemical liquid 20 laterally and upwardly are arranged along the peripheral part, and a nozzle part 30 arranged at the rearmost part. And a blower 32 that discharges the air sucked from the rear to the jet nozzle 30.

FIG. 2 is a vertical sectional view showing the structure of the lid 22. Input 34
Is formed in the center of the upper portion of the chemical liquid tank 24, the lid 22 is screwed into the input port 34 via the thread groove 35 on the outer periphery of the lower end portion, and the main body 38 that presses the packing 36 onto the upper peripheral portion of the input port 34,
Insert multiple screws into the main body 38 through the lower opening of the main body 38.
A circular closure plate 42 fixed to the body 38 by 40. The circular closing plate 42 has a plurality of through holes 44 in the peripheral portion at equal angular intervals in the circumferential direction, and the through holes 44 communicate the circular closing plate 42 in the plate thickness direction.

FIG. 3 is a perspective view of the main body 38 of the lid 22 as viewed from the opening side thereof. An annular step portion 46 is formed on the inner side of the peripheral wall on the inner side of the main body 38 so that the peripheral portion of the circular closing plate 42 (Fig. 2) can be applied. A screw hole 48 is provided in each annular step 46 so that a screw 40 (FIG. 2) can be screwed into it. The plurality of guide grooves 50 are formed at equal angular intervals in the circumferential direction, for example, at 90 ° intervals, so as to cut out portions in the circumferential direction of the annular step portion 46. The air holes 52 are formed at the positions of the respective guide grooves 50 so as to penetrate the peripheral wall of the main body 38 in the radial direction.

FIG. 4 shows the main body 38 by removing the circular closing plate 42 from the lid 22 of FIG.
It is the figure which looked at the inside from the opening side. 2 and 4, the balls 54 are arranged in the respective guide grooves 50, and the air holes 52 can be opened and closed while being guided by the guide grooves 50 in the radial direction of the lid 22. The circular movable body 56 is disposed inside each ball 54, and is slidably arranged on the upper surface of the circular closing plate 42 in the radial direction of the main body 38 in the space between the end wall of the main body 38 and the circular closing plate 42. Set up. In FIG. 4, D indicates that each ball 54 has an air hole.
When in the closed position of 52, the diameter of the circle that is in common contact with the inner ends of each ball 54, d is the diameter of the circular movable body 56, and O1 and O2 are the main body 38 and the circular movable body 56, respectively.
Shows the center of. Since D> d, the center O2 of the circular movable body 56 can be displaced from the center O1 of the main body 38 in the range of (D-d) / 2.

FIG. 1 shows the lid 22 when the chemical liquid tank 24 is tilted in the direction A.
FIG. 5 and FIG. 6 are views showing the state of the chemical liquid tank 24, and FIGS. 5 and 6 show the state of the inside of the main body 38 when the chemical liquid tank 24 is inclined in the direction of A by removing the circular closing plate 42 from the lid 22 of FIG. It is the figure seen from the opening side of the main body 38. The operation of the embodiment will be described with reference to FIGS. 1 to 6.

When the speed sprayer 10, and therefore the chemical liquid tank 24, tilts in the A direction, the circular movable body 56 also moves in the A direction as the lower direction of the tilt in accordance with the tilt of the chemical liquid tank 24. As a result, as shown in FIGS. 5 and 6,
The ball 54 on the lower side in the inclination direction is pressed by the circular movable body 56 and is pushed into the guide groove 50 toward the air hole 52,
Close the air hole 52. The chemical solution 20 in the chemical solution tank 24 is the first
As shown in the figure, with the inclination of the chemical liquid tank 24 in the direction of A, the chemical liquid tank 24 is pushed toward the air hole 52 on the lower side in the inclination direction, but by closing the air hole 52 by the ball 54, the chemical liquid is discharged from the air hole 52. Leakage to the outside of the tank 24 is prevented. On the other hand, since the ball 54 on the upper side in the tilt direction is not pressed by the circular movable body 56 toward the air hole 52, the ball 54 on the upper side in the tilt direction is separated from the air hole 52 corresponding to the ball 54.
Are held in a state where the inside and outside of the chemical liquid tank 24 communicate with each other.
The inside of the chemical liquid tank 24 is in communication with the outside of the chemical liquid tank 24 through the through hole 44 of the circular closing plate 42 and the open air hole 52, and is maintained at atmospheric pressure.

When the chemical liquid tank 24 returns to the horizontal posture, the circular movable body 56 does not receive the gravity that is displaced in the radial direction of the main body 38, and the circular movable body 56 is shown in FIGS.
It is held at a position displaced from the center O1 of the main body 38 as shown, or at a position where the center O2 coincides with the center O1 of the main body 38 as shown in FIG. Regardless of the position of the circular movable body 56, at least one ball 54 is separated from the air hole 52, and the air hole 52 communicates with the inside and outside of the chemical liquid tank 24. The internal pressure is maintained at atmospheric pressure.

FIG. 7 is a perspective view of the main body 38 of the lid 22 provided with the compression coil spring 60 for urging the ball 54 as seen from the opening side thereof. A notch groove 58 corresponding to each ball 54 is provided around the circular movable body 56.
And a compression coil spring 60 is partially inserted into each notch groove 58 to bias the ball 54 toward the air hole 52. The free length of the compression coil spring 60 is set so that the ball 54 on the other side can be separated from the air hole 52 when the circular movable body 56 is displaced to one side, so that the opening of the air hole 52 is not hindered. To In this embodiment, when the circular movable body 56 moves according to the inclination of the chemical liquid tank 24, the ball 54 on the lower side in the inclination direction is reliably and stably pressed against the air hole 52 by the compression coil spring 60, and the air hole 52. Will be surely closed.

In the illustrated embodiment, each ball 54 opens and closes the air hole 52 by the movement of the circular movable body 56 according to the inclination of the chemical liquid tank 24. However, the circular movable body 56 is located at the center of the main body 38 as shown in FIG. The ball 54 may be fixed in position or formed integrally with the main body 38, and each ball 54 may be displaced in the direction of the guide groove 50 according to the inclination of the chemical liquid tank 24 by the gravity applied to itself to open and close the air hole 52. It is possible.

Further, in the illustrated embodiment, the position of each ball 54 is controlled by a common circular movable body 56, but it is possible to provide a movable body for ball operation instead of the circular movable body 56 for each ball 54. . For example, the circular movable body 56 is divided into a plurality of fan-shaped portions corresponding to the balls 54, and a guide for guiding the fan-shaped portions in the radial direction of the main body 38 is provided for each fan-shaped portion.

[Effect of device]

In the inventions of claims 1 to 3, due to gravity applied to the valve body itself or the movable body, the valve body is displaced according to the inclination of the spray liquid tank, and the air holes on the upper side and the lower side in the inclination direction are opened and closed, respectively. Retained. Since the closing force of the valve body due to gravity applied to the valve body itself or the movable body when the spray liquid tank is inclined is sufficiently larger than the force received from the spray liquid body or the foam-like spray liquid in the spray liquid tank, The air hole on the lower side of the tilt direction can be securely closed to prevent the spray liquid from leaking from the air hole, and the air hole on the upper side in the tilt direction is kept open even when the spray liquid tank is tilted. As a result, the atmospheric pressure in the spray liquid tank can be maintained at the atmospheric pressure, and the deterioration of the suction function of the pump can be avoided.

According to the second aspect of the present invention, since the movable body which receives gravity and displaces each valve body is provided in common, the number of parts can be reduced and the entire structure can be simplified.

In the invention of claim 3, since the valve body opens and closes the air hole by the gravity applied to the valve body, the movable body is omitted, thereby reducing the number of parts and simplifying the entire structure. .

[Brief description of drawings]

The drawings relate to the embodiment of the present invention, FIG. 1 is a view showing the state of the lid and the chemical liquid tank when the chemical liquid tank is tilted in the direction of A, FIG. 2 is a vertical sectional view showing the structure of the lid, FIG. Is a perspective view of the main body of the lid viewed from the opening side, and FIG. 4 is a view of the inside of the main body viewed from the opening side with the circular closing plate removed from the lid of FIG.
5 and 6 are views of the inside of the main body when the chemical liquid tank is tilted in the direction A, as seen from the opening side of the main body with the circular closing plate removed from the lid of FIG. 1, and FIG. FIG. 8 is a perspective view of the main body of the lid provided with a compression coil spring for urging the valve from the opening side, and FIG. 8 is a schematic side view of the speed sprayer. 10 …… Speed sprayer (sprayer), 20 …… chemical liquid (spray liquid), 22 …… lid (spray liquid tank lid), 24 …… chemical liquid tank (spray liquid tank), 52 …… air hole, 54… … Ball (valve body), 56 …… Circular movable body (movable body).

Claims (3)

[Scope of utility model registration request] 1. A spray liquid tank lid (22) for a spray vehicle (10) comprising a spray liquid tank lid (22) openably and closably provided on an upper portion of a spray liquid tank (24) for storing the spray liquid (20). ), The spray liquid tank (24) is formed on the peripheral wall at intervals in the circumferential direction.
Multiple air holes (52) that communicate the inside and outside of each, and each air hole (52)
Corresponding to the valve body (54) for opening and closing the air hole (52) provided displaceably in the radial direction of the spray liquid tank lid (22),
Movable body (56) that moves in relation to the inclination of the spray liquid (20) to seat the valve body (54) on the lower side in the inclination direction in the air hole (52).
And a cover for a spray liquid tank of a spray vehicle. 2. The movable body (56) is a cover for the spray liquid tank.
2. The spraying vehicle for sprayer according to claim 1, wherein the valve body (54) is movable in the radial direction of the (22) with respect to the center of the spray liquid tank lid, and the valve bodies (54) can be commonly operated. Lid for liquid tank. 3. A spray liquid tank lid (22) for a spray vehicle (10) comprising a spray liquid tank lid (22) openably and closably provided on an upper portion of a spray liquid tank (24) for storing the spray liquid (20). ), The spray liquid tank (24) is formed on the peripheral wall at intervals in the circumferential direction.
Multiple air holes (52) that communicate the inside and outside of each, and each air hole (52)
According to gravity, the lid for the spray liquid tank is provided corresponding to
A cover for a spray liquid tank of a spray vehicle, comprising: a valve body (54) which is displaced in a radial direction of (22) and opens and closes the air hole (52).