JPH1052207A - Nebulizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprayer capable of locking an on-off valve in an open or closed state. SOLUTION: In this sprayer having a pressurizing pump P in a chemical liquid tank T, the cross section of a piston rod 1 has a non-rotational shape, controls the rotation of a cylinder cap K around a shaft by a rod passing hole 42 and the rod 1 is rockingly engaged through a through hole 51 with a lever piece 50. When a piston 2 is positioned at a bottom dead center, the base part of an exposure part 4 of the rod 1 is equipped with a swollen part. A cut part 6 adjacent to the swollen part makes the rod rotatable in the rod passing hole. The rod is revolved, the peripheral edge part of the rod passing hole is advanced into the cut part 6 and an engaging projection 7 attached to the exposure part 4 is brought into contact with the peripheral edge part of the through hole 51 from above or from below to suppress the movement of the lever piece. Consequently, the rod 1 and the lever piece can be simultaneously locked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spraying device provided with a hand-operated chemical liquid pressurizing pump, and more particularly to an improvement for improving safety of a spraying operation.

[0002]

2. Description of the Related Art There are two types of this kind of chemical liquid pressurizing pumps, as described below as an example of an embodiment of the present invention.
The type in which the pressure applied by the pump is stored in a chemical tank formed of a gas-tight and liquid-tight pressure-resistant container also serving as a pressure accumulating chamber, and, for example, as shown in FIG. An outer cylinder 152 is provided coaxially with the cylinder 151 outside the cylinder 151, and an upper part of the outer cylinder is
A cylinder cap 154 is fixed, and a dish-like member 155 having an opening through which the cylinder is inserted at the center is fixed to the lower part of the outer cylinder to form a pressure accumulation chamber 153 surrounding the cylinder 151.

A discharge valve 156 permits one-way movement of the chemical from the lower part of the cylinder into the accumulator.
Reference numeral 7 denotes a suction valve which faces the strainer 157a at the lower end and opens into the chemical solution tank 160. A discharge pipe 158 has one end opened below the accumulator and is fixed to the outer peripheral surface of the cylinder. It protrudes from the accumulator upper wall 165 to the outside of the accumulator while maintaining air and liquid tightness.

If the tank is to be carried in a shouldered manner according to the size and structure of the chemical tank 160, the discharge pipe 1
A spray rod having an on-off valve and a spray nozzle is attached to the protrusion of 58 via a hose 161. When the spray nozzle and the chemical liquid tank are of an integrated type of a hand-held tank system, a rigid pipe having a spray nozzle at the tip is provided. It is connected via an on-off valve.
The same applies to the case where the above-mentioned chemical solution tank is a type of chemical solution pressurizing pump that also serves as a pressure accumulating chamber.If the chemical solution tank is large, carry the chemical solution tank with a shoulder or hand-held type. The chemical liquid tank and the liquid tank are integrated into a hand-held tank system.

[0005]

[Problem] In a spraying device having such a hand-operated type chemical solution pressurizing pump, in a type of spraying device in which a chemical solution tank and a spray nozzle are connected via a flexible chemical solution conduit such as a hose, when spraying a chemical solution, Keeping pushing the lever piece of the on-off valve with a finger causes fatigue, and therefore, means having means for locking the lever piece while the on-off valve is kept open,
Already known. However, in particular, in a sprayer in which the chemical solution tank and the spray nozzle are integrated, a reciprocating pressurizing means (162) for pressurizing the chemical solution and a discharge pipe 158 are provided.
An on-off valve that opens and closes the pipeline interposed between the spray nozzle and the spray nozzle is provided in close proximity, so pressurize the chemical and carry it with you. There was the danger that the chemical would accidentally splatter due to touching the open / close lever of the open / close valve, causing an unexpected accident. However, this type of nebulizer requires the chemical solution tank to be held with one hand to perform the nebulization operation, so there is a restriction that the entire nebulizer must be manufactured in a small size. Therefore, there is no known sprayer having a simple and effective safety device for preventing such accidents from occurring, which leads to a significant increase in cost. In addition, those having a means for locking the open / close valve in an open state,
At the same time, it is also unknown at the same time because the mechanism is complicated.

[0006]

SUMMARY OF THE INVENTION A first object of the present invention is to disclose a sprayer capable of locking a lever for opening and closing an on-off valve in a continuous spraying state or a non-spraying state.

A second object of the present invention is to lock the piston rod of the chemical liquid pressurizing pump with a simple mechanism,
The locking of the on-off valve is also to provide a simultaneous sprayer at a low cost.

[0008]

A first gist of the present invention is to provide a chemical solution tank, a chemical solution pressurizing pump mounted on the chemical solution tank, a chemical solution conduit for guiding the chemical solution pressurized by the pump, and a chemical solution conduit. In a sprayer provided with a communicating spray nozzle and a pipe opening / closing valve provided in the middle of the chemical solution conduit, a piston rod of the chemical solution pressurizing pump is provided in a cylinder with a non-rotating cross-sectional shape. The piston rod is slidably protruded from the rod passage hole, thereby restricting the rotation of the piston rod about its axis, and the piston rod is provided with a lever piece for opening and closing the on-off valve in close proximity. , When the piston of the chemical pump is at the bottom dead center,
The base end of the exposed portion where the piston rod protrudes outside the cylinder is in contact with the peripheral portion of the rod passage hole, and the cutout provided adjacent to the base end of the exposed portion is located within the rod passage hole of the piston rod. By turning the piston rod by positioning the cutout portion in the rod passage hole, the lever piece is locked by locking means provided on the exposed portion, and When the opening / closing operation of the on-off valve is locked, the peripheral portion of the rod passage hole is configured to enter the notch of the piston rod and be locked in a state in which it cannot reciprocate. is there.

[0009] In the sprayer according to the first aspect, the cross-sectional shape of the piston rod is, for example, an ellipse or a polygon. The notch is for changing the cross-sectional shape of the piston rod into a rotatable shape.If it is elliptical, it can be made circular by a notch that cuts its long axis portion, if it is polygonal, The object can be achieved by a cutout for removing a corner. In this way, the piston rod can rotate around the central axis without being interfered by the rod passage hole for the piston rod to protrude and retract from the cylinder.
The amount of rotation of the piston rod may be such that the lever piece of the on-off valve and the piston rod can be disengaged, and the required rotation angle is
It depends on the structure of the locking means formed on the piston rod and the lever piece.

[0010] As the locking means, a projection or a protruding piece provided on the protruding portion of the piston rod is typical. A typical shape of the notch provided in the piston rod is a groove that is recessed in the cross-sectional direction of the piston rod, and the piston rod is rotated so that the rod passage hole of the cylinder enters the groove. For example, the piston rod
In the notch, the periphery of the rod passage hole is sandwiched, so that reciprocation of the piston rod is prevented. Thus, when pressurizing the drug solution by reciprocating the piston rod, it moves up and down while maintaining a constant posture, and when pressurization is completed, the piston rod is rotated by placing the piston at the bottom dead center. Fixing and locking of the lever piece of the on-off valve can be performed at the same time, and the handle of the piston rod also becomes a hanging handle for carrying.

In particular, the lever piece of the on-off valve is urged toward the closed position by a spring pressure directly or via a valve rod, and the lever piece is locked on the upper or lower part of the locking means. , Respectively, such that the on-off valve can be locked in the closed state or the open state.

A second gist of the present invention is to provide a chemical solution tank, a chemical solution pressurizing pump mounted on the chemical solution tank, and one end open near the bottom of the chemical solution tank and the other end outside the chemical solution tank. A liquid chemical pipe which is projected while maintaining liquid tightness, a spray nozzle fixed to a projecting end of the liquid chemical pipe, a pipe opening / closing valve provided in the middle of the chemical liquid pipe, and an opening / closing operation of the open / close valve And a handle provided in proximity to a lever piece to be operated, wherein a cross-sectional shape of a piston rod of the chemical liquid pressurizing pump is non-rotating, and the piston rod is provided on a cylinder cap. The rotation of the shaft center is restricted by the rod passage hole, so that only reciprocation in the longitudinal direction is possible, and the lever piece is swingably and loosely fitted to the piston rod by a through hole opened in the lever piece. Under the piston rod When is located near the bottom dead center, the base of the exposed portion of the piston rod from the cylinder is provided with a bulging portion that abuts on the periphery of the rod passage hole from outside to define the bottom dead center of the piston, A push handle is formed at the protruding end of the exposed portion, and a notch provided in the piston rod adjacent to the lower end of the bulging portion allows the piston rod to rotate in the rod passage hole,
When the notch is rotated along the rod passing hole peripheral edge, and the rod passing hole peripheral edge is inserted into the notch,
A locking projection provided on the exposed portion of the piston rod,
The sprayer is characterized in that the piston rod is locked and the lever piece is locked by contacting the peripheral edge of the through hole to prevent the operation of the lever piece.

In the atomizer according to the second aspect, when the piston rod having a non-rotating cross-sectional shape can reciprocate, the through hole provided in the lever piece of the on-off valve does not interfere with the lever piece at all. When the piston is placed at the bottom dead center, the piston rod is rotated, and the peripheral portion of the rod passage hole is locked by the cutout, the locking projection provided on the piston rod is provided. The lever also rotates and comes to a position where it comes into contact with the peripheral edge of the through hole, so that the valve opening or closing operation of the lever piece is prevented. Therefore, when the piston rod is at the reciprocating position, the shape of the engaging projection is determined so that the engaging projection can freely pass through the through hole.

[0014]

1 to 8 show an example of an embodiment of the present invention. In FIG. 1, a chemical solution tank T also serving as a pressure vessel has a circular opening 20 at an upper part thereof.
On the outer peripheral surface of the cylindrical portion 21 provided so as to surround the opening portion 20, a male screw portion 22 is engraved. This opening 20
A disk-shaped lid 30 (see FIG. 7) having a substantially disk shape and having a flange portion 31 at the peripheral edge thereof is provided so as to close the peripheral portion of the opening 32 provided in the lid 30. A cylinder 33 of the chemical liquid pressurizing pump P is vertically provided integrally.

Adjacent to the opening 32 of the cylinder 33,
A lower portion 34 of the valve chamber of the on-off valve V is formed in the lid 30. The lid 30 has a flange portion 31 pressed against the upper end edge of the cylindrical portion 21 via a sealing material 91 by a cap body K described later. The cap body K has a female screw portion 41 formed on the inner peripheral surface of the side surface.
The cover 30 is pressed and fixed to the chemical solution tank T by screwing and tightening the cover 2. A rod passage hole 42 communicating with the inside of the cylinder 33 and an upper portion 43 of the valve chamber of the on-off valve V are provided on the top surface of the cap body K, and are pressed against the lower portion 34 of the valve chamber via a seal material. A valve chamber for the on-off valve V is formed.

In this valve chamber, a valve rod 45 is housed, and its upper end 46 is urged by a spring 35 housed in a lower part 34 of the valve chamber, so that the upper end 46 is air- and liquid-tight from the upper opening of the valve chamber. Projecting upward. A lever piece 50 is in sliding contact with the protruding end of the valve rod 45 on the lower surface 52 near the base end thereof. The lever piece 50 is integrally formed on both sides of the protruding end of the valve rod 45 from the cap body K. A base end 50a of the lever piece is supported by a vertically-supported pivotally supporting portion 47 so as to be swingable in the vertical direction, and is normally moved upward by the urging force of a spring 35 via the upper end of the valve rod 45. Has been energized.

The lower surface 52 of the lever piece 50, which is in sliding contact with the valve rod, receives the urging force of the valve rod and can maintain the lever piece in a substantially horizontal position (L position, see FIG. 2) when the valve is closed. A rod pressing portion protruding downward in a chevron shape is formed next to the surface and the corresponding contact surface, and the lever piece is rotated downward from the substantially horizontal position (L) to the inclined position (D). Position), the push-down unit pushes down the valve rod 45 to open the valve. The lever piece 50 has a through hole 51 formed therein.
However, it is inserted with a sufficient play gap between the first ridge 1a described later.

The piston rod 1 has a rod passage hole 4
2 slidably passes through and enters the cylinder 33, and a piston 2 is fixedly provided at the lower end of the rod 1. Reference numeral 37 denotes a check valve for passing the air pressurized by the piston from the cylinder side into the tank. 36 is the lower end 3
In 6a, the other end is a chemical liquid conduit that opens to the bottom of the chemical liquid tank and communicates with the valve chamber of the on-off valve V, and protrudes outside the cap body K via the on-off valve V. At the protruding end, the spray nozzle N
Installed. H is a handle that extends from the cap body K below the lever piece 50 along the lever piece and is bent downward.

In such a sprayer, the cross-sectional shape of the piston rod 1 in the cylinder 33 is substantially cross-shaped as shown in FIG. 6, and the substantially cross-shaped first ridge 1a intersects vertically and horizontally. , 1a crosses this second
Distance from center 3 (projection degree) compared to ridges 1b and 1b
Is set to be large. When the piston 2 is located at the bottom dead center, the exposed portion 4 where the piston rod 1 is out of the cylinder is provided as a bulging portion 5 for defining the bottom dead center of the piston 2, As shown in FIG. 5, the second ridge 1b is provided so as to protrude from the rotation center 3 to the same extent as the first ridge 1a.

The rod passage hole 42 provided on the upper surface of the cap body K so as to face the opening of the cylinder 33 has a circular portion 4 having a diameter substantially equal to the degree of protrusion from the center 3 of the second ridge 1b.
2a, and a pair of rectangular portions 42b projecting from the circular portion 42a in a rectangular shape at positions facing each other with the center of the circular portion therebetween,
42b, and the first ridge having a large degree of protrusion from the center 3 enters the square portion 42b and reciprocates slidably, whereby the piston rod 1 rotates around the center 3. The reciprocation in the longitudinal direction is allowed, and is prevented. As will be described later, the lower end 5a of the bulging portion 5 abuts on the periphery of the circular opening 42a from above by rotating the rod 1 so that the piston rod 1 can be further inserted into the cylinder. Intrusion is prevented and piston 2
The bottom dead center is defined.

The first protrusions 1a and 1a of the piston rod are cut off by a predetermined width in the vertical direction adjacent to the lower end 5a of the bulging portion 5 so that the degree of protrusion from the center 3 is reduced to the second.
Cutouts 6, 6 are formed so as to be the same as the ridges. The notches 6, 6 allow the piston rod 1 to move when the piston 2 is located at the bottom dead center.
a can rotate around the rotation center 3 without being interfered by the peripheral portion of the circular portion 42a. Reference numeral 42c denotes a projection provided on the inner peripheral surface near the rod passage hole 42, and is a positioning stopper for rotating the piston rod by a predetermined angle (for example, 90 degrees).

The first in the exposed portion 4 of the piston rod 1
Locking projections 7, 7 are protruded from the ridges 1a, 1a. The through holes 51 formed in the lever piece 50 are provided when the piston rod 1 is at a position where the piston rod 1 can reciprocate up and down. It is formed of a long hole having a sufficiently large gap between the locking projection 7 and the peripheral edge of the through hole 5 so that the locking projections 7 of the piston rod can pass through without any trouble. On the other hand, the distance from the center of rotation 3 to the peripheral portion of the through hole 51 via the second ridge 1b is set to be almost equal to the degree of protrusion of the first ridge 1a from the center 3. Therefore, when the piston 2 is located at the bottom dead center, the pump handle 8 is grasped, and the piston rod is rotated about 90 degrees around the center 3, the notch 6
Is in a state sandwiching the peripheral edge of the rod passage hole 42, the piston rod 1 is locked by the peripheral edge of the rod passage hole, and the first protrusion 1
a can be slidably contacted with the periphery of the through hole.

At this time, when the lever piece 50 is at the horizontal position (L), the locking projection 7 is moved to the upper end face 7a of the locking projection 7.
Is positioned such that it comes into contact with the periphery of the through hole 51 provided in the lever piece from below. Further, if the rotation operation of the piston rod 1 is performed at the position (D) where the lever piece 50 is pressed down, the lower end surface 7
b is previously contacted with the through-hole periphery from the upper side,
The position of the locking projection and the length in the vertical direction are determined.
In FIGS. 3 and 7, reference numeral 36 denotes a connecting projection with a chin having an arrow-shaped cross section protruding from the upper surface of the lid 30 and being snap-connected to a connecting hole 46 provided at a corresponding portion of the cap body K.
The cap body K and the lid body 30 are connected.

The user of the sprayer removes the integral body of the cap and the lid, fills the tank with the chemical, and again
After attaching the cap body, the piston rod is operated to pressurize the chemical solution. When moving under pressure,
When the piston rod is rotated 90 degrees at a position where the piston is pushed down while the lever piece is kept horizontal, and the rod 1 is locked, the lever piece 50 is simultaneously locked. The opening and closing valve is locked by being closed by the upper end surface 7a. or,
At the position where the piston rod 1 is unlocked, the lever piece 50 is fully pressed down, and then the piston rod is locked again.
, The opening / closing valve V is locked in the open state, and the spraying of the chemical solution continues without pushing down the lever piece with a finger.

[0025]

In this type of conventional sprayer, since the chemical liquid tank T and the spray nozzle N have an integral structure, the handle H is held with one hand to support the weight of the chemical liquid, and the lever piece is held with the thumb. Since the three operations of continuing the pressing operation and continuing the operation of determining the spray direction toward the object to be sprayed are performed at the same time, the burden on the fingers is large and fatigue increases, so the tank capacity is naturally limited. , The spray duration was also able to be sprayed only for a very short time,
Since the sprayer of the present application is released from the operation of the lever piece, there is no unnatural work of the fingers and the fatigue is small. Therefore, also
Upsizing is also possible. Further, if the lever piece is locked at the valve closing position, an accidental ejection of a dangerous chemical solution during carrying can be prevented beforehand, and the pump handle can be conveniently used as a carrying handle.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing an embodiment of the present invention.

FIG. 2 is a side view showing the sprayer of FIG. 1 in a state where a piston rod is pulled up.

FIG. 3 is an explanatory view of the sprayer of FIG. 1 as viewed from a direction of a cross section AA.

FIG. 4 is a partially omitted explanatory view of a piston rod viewed from a side.

FIG. 5 is an explanatory view as viewed from the direction of the section BB in FIG. 4;

FIG. 6 is an explanatory diagram viewed from a cross-sectional direction along line CC in FIG. 4;

FIG. 7 is an explanatory view of the lid of FIG. 1 viewed from a plane direction.

FIG. 8 is an explanatory view showing a structure of a rod passage hole of a cap body.

FIG. 9 is an explanatory view showing an example of a conventional sprayer.

[Explanation of symbols]

 T Chemical liquid tank N Spray nozzle P Chemical liquid pressurizing pump K Cap body V On-off valve 1 Piston rod 2 Piston 4 Exposed part 7 Locking projection 30 Lid 35 Spring 42 Rod passage hole 45 Valve rod 50 Lever piece 51 Through hole

Claims (4)

[Claims] 1. A chemical solution tank, a chemical solution pressurizing pump mounted on the chemical solution tank, a chemical solution conduit for guiding a chemical solution pressurized by the pump, a spray nozzle communicating with the chemical solution conduit, and a In a sprayer provided with a pipe opening / closing valve provided on the way, a piston rod of the chemical liquid pressurizing pump slidably protrudes from a rod passage hole provided in a cylinder with a non-rotating cross-sectional shape. By doing so, the rotation of the piston rod about the shaft center is restricted, and a lever piece for opening and closing the on-off valve is provided in close proximity to the piston rod. When the piston rod protrudes out of the cylinder, the base end of the exposed part is in contact with the periphery of the rod passage hole, and the notch provided adjacent to the base part of the exposed part is a piston. The notch is positioned in the rod passage hole and the piston rod is rotated to lock the lever piece on the exposed portion. When the opening / closing operation of the opening / closing valve is locked by locking the opening / closing valve, the peripheral portion of the rod passage hole enters the notch portion of the piston rod and is locked so as not to reciprocate. A sprayer characterized by that: 2. The on-off valve lever piece is urged by a spring pressure toward a closed position, and the on-off valve lever piece is locked on the upper or lower portion of the locking means, respectively, so that the on-off valve lever piece is closed. Or being configured to be locked in an open position.
Sprayer. 3. A chemical solution tank, a chemical solution pressurizing pump mounted on the chemical solution tank, and one end opened near the bottom in the chemical solution tank and the other end protruding outside the chemical solution tank while maintaining air and liquid tightness. A chemical solution conduit, a spray nozzle fixed to a projecting end of the chemical solution conduit, a pipeline opening / closing valve provided in the middle of the chemical solution conduit, and a lever piece that opens and closes the opening / closing valve. And a handle portion provided in the sprayer, wherein a cross-sectional shape of a piston rod of the chemical liquid pressurizing pump has a non-rotating shape, and the piston rod has a shaft center formed by a rod passage hole provided in a cylinder cap. Rotation is restricted and only longitudinal reciprocation is possible, and the lever piece is swingably and loosely fitted in the piston rod by a through hole opened in the lever piece. When located near the dead center At the base of the exposed portion of the ston rod from the cylinder, there is provided a bulging portion which abuts the outer periphery of the rod passage hole from outside to define the bottom dead center of the piston, and a push handle is provided at the protruding end of the exposed portion. A notch provided in the piston rod adjacent to the lower end of the bulging portion allows the piston rod to rotate in the rod passage hole, and the notch is formed in the peripheral portion of the rod passage hole. When the peripheral portion of the rod passage hole is moved into the notch portion, the locking projection provided on the exposed portion of the piston rod contacts the peripheral portion of the through hole from above or below. A sprayer characterized in that it locks a piston rod and a lever piece by contacting and preventing movement of the lever piece. 4. The lever piece of the on-off valve is urged by a spring pressure toward the closed position, and the upper edge or the lower edge of the locking projection is locked with the through-hole peripheral portion of the lever piece, respectively. 4. The spray according to claim 3, wherein the on-off valve is configured to be locked in a closed position or an open position.