JP3442583B2 - Nebulizer - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art There are two types of chemical liquid pressure pumps of this type, and as will be described later as an example of an embodiment of the present invention,
For example, as shown in FIG. 9, the pressure applied by the pump is stored in a chemical liquid tank composed of air and a liquid-tight pressure container that also functions as a pressure accumulator, and the pressure accumulator and the pressure pump are integrated. The outer cylinder 152 is provided on the outer side of the cylinder 151 coaxially with the cylinder 151.
A cylinder cap 154 is fixed, and a dish-shaped member 155 having an opening through which the cylinder is inserted is fixedly provided in the lower portion of the outer cylinder to form a pressure accumulating chamber 153 surrounding the cylinder 151.

Reference numeral 156 is a discharge valve which allows the unidirectional movement of the chemical liquid from the lower portion of the cylinder into the pressure accumulating chamber.
7 is a suction valve that faces the strainer 157a at the lower end and is opened in the chemical liquid tank 160, and 158 is a discharge pipe whose one end is opened below the pressure accumulating chamber, and is fixed to the outer peripheral surface of the cylinder, and its upper end 164 is From the upper wall surface 165 of the pressure accumulating chamber, air and liquid-tightness is maintained and the outside of the pressure accumulating chamber is projected.

According to the size and structure of the chemical liquid tank 160, when the tank is carried on a shoulder, the discharge pipe 1
A spray rod having an opening / closing valve and a spray nozzle is attached to the protruding portion of 58 via a hose 161, and in the case of a hand-held tank system in which the spray nozzle and the chemical liquid tank are integrated, a rigid pipe body having a spray nozzle at the tip is attached. It is connected via an on-off valve.
The same applies to the case where the chemical solution tank described above is a chemical solution pressurizing pump that doubles as a pressure accumulating chamber.If the chemical solution tank is large, carry the chemical solution tank on the shoulder or by hand, and if it is small, use it as a spray nozzle. It is a hand-held tank system that is integrated with the chemical tank.

[0005]

[Problem] In a spray device having such a hand-operated chemical liquid pressure pump, in a spray device of a type in which a chemical liquid tank and a spray nozzle are connected via a flexible chemical liquid conduit such as a hose, during spraying of the chemical liquid, Continuing to press the lever piece of the on-off valve with a finger causes fatigue, so one that has a means for locking the lever piece while the on-off valve is open,
Already known. However, particularly in a sprayer of the type in which the chemical liquid tank and the spray nozzle are integrated, the reciprocating pressurizing means (162) for pressurizing the chemical liquid and the discharge pipe 158 are provided.
An on-off valve that opens and closes the pipeline by intervening between the spray nozzle and the spray nozzle is provided close to each other, so that the operator may accidentally touch it while carrying or pressurizing the drug solution or during the spraying operation. If you touch the open / close lever of the open / close valve, there is a risk of accidental splashing of the chemical liquid and an unexpected accident. However, this type of nebulizer has a constraint that the whole nebulizer must be manufactured in a small size because it is necessary to carry out the nebulizing operation by holding the chemical liquid tank with one hand, and if this type of safety device is attached, the structure becomes complicated. However, there is still no known atomizer equipped with a safety device that is simple and effective for preventing accidents of this kind. In addition, those equipped with means for locking the open / close valve in the open state,
The current situation is that it is not yet known because it complicates the mechanism.

[0006]

A first object of the present invention is to disclose a sprayer capable of locking a lever piece 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 that the mechanism is simple and the piston rod of the chemical liquid pressure pump is locked.
The locking of the on-off valve is also to provide a simultaneous atomizer at low cost.

[0008]

The first gist of the present invention is to provide a chemical liquid tank, a chemical liquid pressure pump mounted on the chemical liquid tank, a chemical liquid conduit for guiding the chemical liquid pressurized by the pump, and a chemical liquid conduit to the chemical liquid conduit. In a sprayer provided with a spray nozzle communicating with each other and a pipeline opening / closing valve provided in the middle of the chemical liquid conduit, a piston rod of the chemical liquid 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 so that the rotation of the piston rod about the axis is restricted, and a lever piece for opening and closing the on-off valve is provided close to the piston rod. , When the piston of the chemical pump is at bottom dead center,
The base end of the exposed portion of the piston rod protruding outside the cylinder is in contact with the peripheral edge of the rod passage hole, and the notch provided adjacent to the base end of the exposed portion is inside the rod passage hole of the piston rod. The rotation of the lever piece is made possible by positioning the notch in the rod passage hole and rotating the piston rod to lock the lever piece to the locking means provided in the exposed portion. A sprayer, characterized in that, when the opening / closing operation of the on-off valve is locked, the peripheral edge portion of the rod passage hole is configured to enter the notch portion of the piston rod and be locked in a state of being unable to reciprocate. is there.

In the atomizer according to the first aspect, the cross-sectional shape of the piston rod is, for example, elliptical or polygonal. The notch is for reversing the cross-sectional shape of the piston rod into a rotatable shape.If it is oval, it can be made circular by the notch that cuts the long axis part, and if it is polygonal, The purpose can be achieved by the notch that eliminates the corner. In this way, the piston rod can be rotated around the central axis without being interfered with by the rod passage hole for allowing the piston rod to move in and out of the cylinder.
The amount of rotation of the piston rod is sufficient if the lever piece of the on-off valve and the piston rod can be engaged and disengaged, and the required rotation angle is
It depends on the structure of the locking means formed on the piston rod or the lever piece.

As the locking means, a protrusion 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 transverse cross-sectional direction of the piston rod, and the piston rod is rotated so that the rod passage hole of the cylinder is inserted into this groove. For example, the piston rod
The cutout portion sandwiches the peripheral edge portion of the rod passage hole, and therefore the reciprocating movement of the piston rod is prevented. Thus, when reciprocating the piston rod to pressurize the chemical liquid, it moves up and down with a certain posture, and when the pressurization is completed, the piston is placed at the bottom dead center and the piston rod is rotated, The locking 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 serves as a hanging carrying handle.

In particular, the lever piece of the on-off valve is biased toward the closed position by the spring pressure directly or through the valve rod, and the lever piece is locked to the upper or lower part of the locking means. The on-off valve can be configured to be locked in a closed state or an open state, respectively.

A second aspect of the present invention is to provide a chemical liquid tank, a chemical liquid pressurizing pump mounted on the chemical liquid tank, one end opened near the bottom of the chemical liquid tank and the other end outside the chemical liquid tank, A liquid medicine conduit that projects while maintaining a liquid tightness, a spray nozzle fixed to the protruding end of the liquid medicine conduit, a pipeline opening / closing valve provided in the middle of the liquid medicine conduit, and an opening / closing operation of the opening / closing valve. In the sprayer provided with a handle portion provided in the vicinity of the lever piece, the cross-sectional shape of the piston rod of the chemical liquid pressurizing pump is non-rotating, and the piston rod is provided in the cylinder cap. Rotation about the axis is restricted by the rod passage hole and only reciprocal movement in the longitudinal direction is possible. The lever piece is loosely fitted into the piston rod by a through hole opening in the lever piece. Under the piston rod 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 the peripheral edge of the rod passage hole from the outside to define the bottom dead center of the piston. A push handle is formed on the protruding end of the exposed portion, and a notch provided on the piston rod adjacent to the lower end of the bulging portion allows the piston rod to rotate in the rod passage hole.
When rotating the notch along the peripheral edge of the rod passage hole and inserting the peripheral edge of the rod passage hole into the notch,
The locking projection provided on the exposed portion of the piston rod,
The sprayer is characterized in that the piston rod can be locked and the lever piece can be locked by contacting the peripheral portion of the through hole to prevent the lever piece from moving.

In the atomizer according to the second aspect, at the position where the piston rod whose cross-sectional shape is non-rotational can reciprocate, the through hole provided in the lever piece of the on-off valve does not interfere with the lever piece. When the piston is rotated at the bottom dead center and the piston rod is rotated to pinch and lock the peripheral edge of the rod passage hole with the notch, the locking protrusion provided on the piston rod. The lever is also rotated to a position where it comes into contact with the peripheral portion of the through hole, and the valve opening operation or valve closing operation of the lever piece is blocked. Therefore, when the piston rod is in the reciprocable position, the locking projection has a shape of the through hole and / or the locking projection so as to pass through the through hole.

[0014]

1 to 8 show an example of an embodiment of the present invention. In FIG. 1, a chemical liquid tank T that also serves as a pressure container has a circular opening 20 in the upper part,
A male screw portion 22 is engraved on the outer peripheral surface of a cylindrical portion 21 that surrounds the opening 20. This opening 20
A disk-shaped lid 30 (see FIG. 7) having a substantially disk shape and having a flange portion 31 is provided on the peripheral edge of the opening 32 provided on the lid 30 from the peripheral edge of the opening 32. 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 opening / closing valve V is formed in the lid body 30. In the lid body 30, the flange portion 31 is in pressure contact with the upper end edge of the cylindrical portion 21 by the cap body K described later via the sealing material 91. The cap body K is formed with a female screw portion 41 on the inner peripheral surface of the side surface.
The lid body 30 is press-contacted and fixed to the chemical liquid tank T by being screwed into 2 and tightened. 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 by pressing the lower portion 34 of the valve chamber through a sealing material. A valve chamber of the on-off valve V is formed.

A valve rod 45 is housed in the valve chamber, and an upper end portion 46 thereof is biased by a spring 35 housed in a lower portion of the valve chamber 34 so as to be air-tight or liquid-tight from an upper opening of the valve chamber. Protruding upwards. A lever piece 50 is in sliding contact with the protruding end of the valve rod 45 on a lower surface 52 near the base end thereof, and the lever piece 50 is integrally formed from the cap body K on both sides of the protruding end of the valve rod 45. The base end 50a of the lever piece is swingably supported in the vertical direction by a shaft support 47 that is provided upright. Normally, the base end 50a of the lever piece is moved upward by the urging force of the spring 35 via the upper end of the valve rod 45. Is urged by.

The lower surface 52 of the lever piece 50, which is in sliding contact with the valve rod, receives the biasing force of the valve rod so that the lever piece can be maintained in a substantially horizontal position (L position, see FIG. 2) when the valve is closed. Next to the surface and the corresponding contact surface, a rod push-down portion that projects downward in a mountain shape is formed, and the lever piece is rotated downward from the substantially horizontal position (L) to the inclined position (D). Position), the push-down portion pushes the valve rod 45 downward to open the valve. A through hole 51 is formed in the lever piece 50, and the piston rod 1 is inserted into the through hole 51.
However, it is inserted with a sufficient play gap between it and the first ridge 1a described later.

This piston rod 1 has a rod passage hole 4
The rod 2 slidably passes through and enters the cylinder 33, and the piston 2 is fixed to the lower end of the rod 1. Reference numeral 37 is a check valve that allows the air pressurized by the piston to pass from the cylinder side into the tank. 36 is the lower end 3
In 6a, a chemical liquid conduit that opens at the bottom of the chemical liquid tank and has the other end communicating with the valve chamber of the opening / closing valve V, and projects outside the cap body K via the opening / closing valve V. At the protruding end, the spray nozzle N,
It is installed. H is a handle provided below the lever piece 50 from the cap body K, extending along the lever piece, and then bent downward.

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

The rod passage hole 42 provided on the upper surface of the cap body K facing 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 square portions 42b protruding in a square shape from the circular portion 42a at positions facing each other with the center of the circular portion interposed therebetween.
42b, and the first ridge having a large degree of protrusion from the center 3 enters into the square portion 42b and reciprocates slidably, whereby the piston rod 1 is rotated about the center 3. It is blocked, and reciprocating motion only in the longitudinal direction is allowed. As will be described later, by rotating the rod 1, the lower end 5a of the bulging portion 5 abuts against the peripheral edge of the circular opening 42a from above, so that the piston rod 1 is moved into the cylinder further. The entry is blocked and the piston 2
The bottom dead center of is specified.

Adjacent to the lower end 5a of the bulging portion 5, the first protrusions 1a, 1a of the piston rod are cut off by a predetermined width in the vertical direction so that the degree of protrusion from the center 3 becomes second.
Notches 6, 6 are formed so as to be the same as the ridges. Due to the notches 6 and 6, the piston rod 1 is configured such that when the piston 2 is located at the bottom dead center, the first protrusion 1
The peripheral portion of the circular portion 42a allows the rotation of a around the rotation center 3 without interference. 42c is a protrusion 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).

First on the exposed portion 4 of the piston rod 1
The protrusions 1a, 1a are provided with locking protrusions 7, 7, and the through hole 51 formed in the lever piece 50 is formed when the piston rod 1 is in a vertically reciprocable position. In order to allow the locking projections 7, 7 of the piston rod to pass through without any hindrance, a long hole is formed between the locking projection 7 and the peripheral portion of the through hole 5 with a sufficiently large gap. On the other hand, the distance from the rotation center 3 to the peripheral portion of the through hole 51 via the second protrusion 1b is set to be substantially equal to the protrusion degree from the center 3 of the first protrusion 1a. Therefore, when the piston 2 is positioned at the bottom dead center, the pump handle 8 is grasped, and the piston rod is rotated about the center 3 by about 90 degrees, the notch 6 is formed.
Is in a state of sandwiching the peripheral portion of the rod passage hole 42, the piston rod 1 is in a state of being locked by the peripheral portion of the rod passage hole, and the first ridge 1 in the exposed portion 4 is
The a can be slidably contacted with the peripheral portion of the through hole.

At this time, if the lever piece 50 is in the horizontal position (L), the locking projection 7 has an upper end surface 7a.
Is positioned so that it comes into contact with the peripheral edge of the through hole 51 provided in the lever piece from below. Also, when the piston rod 1 is rotated at the position (D) in which the lever piece 50 is pushed down, the lower end surface 7 of the locking projection 7 is
b so that it comes into contact with the peripheral edge of the through hole from above,
The position of the locking projection and the length in the vertical direction are defined.
In FIGS. 3 and 7, reference numeral 36 is a connecting projection with a jaw having an arrow-shaped cross section provided on the upper surface of the lid body 30 by snap-fitting it 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 cap body and the lid body integrally, fills the tank with the chemical liquid, and again,
After attaching the cap body, the piston rod is operated to pressurize the chemical liquid. When moving with pressure applied,
If the piston rod is rotated 90 degrees and the rod 1 is locked at a position where the piston is pushed down while keeping the lever piece horizontal, the lever piece 50 is locked at the same time. It becomes impossible because it is blocked by the upper end surface 7a of the, and the on-off valve is locked in the closed state. or,
When the lever rod 50 is fully pushed down at the unlocked position of the piston rod 1 and then the piston rod is locked again, the lever rod is locked by the lower end surface 7b of the locking projection.
Is pressed from above, the on-off valve V is locked in the open state, and the chemical liquid spraying continues even without pressing down the lever piece with a finger.

[0025]

[Effect] In the conventional sprayer of this type, since the chemical liquid tank T and the spray nozzle N have an integral structure, the grip H is held by one hand to support the weight of the chemical liquid, and the lever piece is pressed by the thumb. Since three operations are performed at the same time, that is, the operation to hold down and the operation to determine the spray direction toward the spray target are performed at the same time, the strain on the fingers is heavy and the fatigue is limited, so the tank capacity is naturally limited. As for the spray duration, I was able to continue spraying 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 fingers and less fatigue. Therefore, again
It is also possible to increase the size. Further, if the lever piece is locked at the valve closing position, it is possible to prevent accidental accidental ejection of dangerous chemical liquid during carrying, and the pump handle can be conveniently used as a carrying handle.

[Brief description of drawings]

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

FIG. 2 is a side view showing the atomizer of FIG. 1 with a piston rod pulled up.

FIG. 3 is an explanatory view of the sprayer shown in FIG. 1 as seen from the direction of the AA cross section.

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

5 is an explanatory view seen from a BB cross section direction of FIG. 4. FIG.

6 is an explanatory view seen from the direction of the CC cross section of FIG. 4;

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

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

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

[Explanation of symbols]

T chemical tank N spray nozzle P chemical pump K cap body V open / close valve 1 piston rod 2 pistons 4 exposed part 7 Locking protrusion 30 lid 35 spring 42 Rod passage hole 45 valve rod 50 lever piece 51 through holes

Claims (4)

(57) [Claims] 1. A chemical solution tank, a chemical solution pressurizing pump mounted on the chemical solution tank, a chemical solution conduit for introducing a chemical solution pressurized by the pump, a spray nozzle communicating with the chemical solution conduit, and a chemical solution conduit for the chemical solution conduit. In a sprayer provided with a conduit opening / closing valve provided on the way, a piston rod of the chemical liquid pressure pump has a non-rotating cross-sectional shape and slidably projects from a rod passage hole provided in the cylinder. By doing so, rotation of the piston rod about the axis is restricted, and a lever piece for opening / closing the opening / closing valve is provided in proximity to the piston rod, and the piston of the chemical pump is at the bottom dead center. The base end of the exposed portion of the piston rod protruding outside the cylinder is in contact with the peripheral edge portion of the rod passage hole, and the notch provided adjacent to the base end of the exposed portion is the piston. The lever piece is rotatable in the rod passage hole, and the lever piece is locked in the exposed portion by rotating the piston rod by positioning the notch in the rod passage hole. When the opening / closing operation of the on-off valve is locked by engaging with the means, the peripheral edge portion of the rod passage hole enters the notch of the piston rod and is locked in a state in which it cannot reciprocate. A sprayer characterized by that. 2. A lever piece of an on-off valve is biased by a spring pressure toward a closed position, and the lever piece of the on-off valve is locked at an upper portion or a lower portion of a locking means, respectively, so that the closed position can be improved. Alternatively, it is configured to be locked in the open position.
Sprayer. 3. A chemical liquid tank, a chemical liquid pressure pump mounted on the chemical liquid tank, one end opened near the bottom of the chemical liquid tank, and the other end protruding outside the chemical liquid tank while keeping air and liquid tightness. A chemical liquid conduit, a spray nozzle fixed to the protruding end of the chemical liquid conduit, a conduit opening / closing valve provided in the middle of the chemical liquid conduit, and a lever piece for opening / closing the opening / closing valve. In a sprayer provided with a handle provided, a cross-sectional shape of a piston rod of the chemical liquid pressure pump is non-rotational, and the piston rod has a shaft passing through a rod passage hole provided in a cylinder cap. Rotation is restricted, and only reciprocating movement in the longitudinal direction is possible. The lever piece is loosely fitted in the piston rod through a through hole that opens in the lever piece, and the piston rod moves downward. When located near the dead point At the base of the exposed portion of the stone rod from the cylinder, there is provided a bulging portion that abuts on the peripheral portion of the rod passage hole from the outside to define the bottom dead center of the piston, and the protruding end of the exposed portion has a hand push handle. And a cutout portion provided on 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 rod passage hole peripheral edge portion is inserted into the notch, the locking projection provided on the exposed portion of the piston rod abuts the through hole peripheral edge portion from above or below. A nebulizer characterized by enabling the locking of the piston rod and the locking of the lever piece by contacting and blocking the movement of the lever piece. 4. The lever piece of the on-off valve is biased toward the closed position by spring pressure, and the through-hole peripheral portion of the lever piece is locked to the upper end or the lower end of the locking projection, respectively. The sprayer according to claim 3, wherein the on-off valve is configured to be locked in a closed position or an open position.