JP2004148160A - Device for sprinkling liquid chemical - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the jetting direction of a liquid chemical from a nozzle changeable by a simple operation without interrupting sprinkling work and necessitating the operation of loosening/fastening a cap nut when the sprinkling work is performed by jetting the liquid chemical from the nozzle of a jetting head part arranged on the tip of a nozzle pipe while holding an operation part. <P>SOLUTION: This pole-shaped device for sprinkling the liquid chemical is constituted so that a barrel part 40 having a small diameter and a reamed cylindrical part 41 are projected from the side of a male-screwed metal fitting w in parallel in the projecting direction, an O-ring 5 is fit to the outer peripheral surface of the part 41, the parts 40 and 41 are inserted into the tip of the nozzle pipe b, the peripheral wall of the tip of the pipe b is drawn, the fitting w is fit to the drawn tip of the pipe b to be rotated and the jetting head part c is fit to the fitting w. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a rod-shaped body with a gripper for freely operating the body, and a connection port for connecting with a connection hose to a discharge pipe of a sprayer that compresses the pump manually or by power. And a control lever for controlling the flow of the liquid chemical guided by the connecting hose, and a chemical liquid in a form in which a jet head for spraying the liquid chemical discharged through a conduit in the lumen of the rod-shaped body is provided on the distal end side. And improvement of the spraying device.
[0002]
[Prior art]
In the conventional device for dispensing a chemical solution of the above-described type, as shown in FIG. 1, an operation part a on the hand side, an intermediate nozzle tube b, and a jet head c on the tip side are usually joined as shown in FIG. They are connected together so as to form a so-called spray rod.
[0003]
The operating part a, the nozzle tube b, and the jetting head c of the spraying device A are provided with a conduit inside the operating part a, and a manual or power source is provided on the outer end side of the conduit. A connection port 10 is provided for connecting via a liquid feed hose H to a discharge port of a sprayer that discharges a chemical solution by compressing a pump by a pump, and a grip portion 11 that can be gripped by the palm of the hand on the outer surface side. An operation lever 12 for operating a valve mechanism incorporated in the internal conduit is provided, and the grip 11 is operated by grasping with a hand, and the operation lever 12 is operated with the finger of the hand grasping the grasp 11. It is configured to control the valve mechanism.
[0004]
In the middle nozzle tube b, as shown in FIG. 2, a connection port 2a provided at a base end thereof is exposed at a tip side of the operation portion a at a tip of a conduit provided. Is connected to the operation part a by fastening a cap nut 20 which is fitted to the base end side of the nozzle tube b to a male screw provided on the outer periphery of the connection port 10. A male screw 21 with a sleeve screwed into a female screw 30 provided at the base end of the jet head c is inserted into the distal end side, and the connection port at the tip of the nozzle tube b is inserted into the jet head c. The male screw 21 with the sleeve is screwed into the female screw 30 of the jet head c from the state of being joined to the joint port on the base end side of the jet head c so as to be connected and connected to the jet head c. It is.
[0005]
In the jet head c, a branch tubular nozzle mounting port 31 is provided in the body thereof, and a nozzle 32 is screwed into the nozzle mounting port 31 for mounting.
[0006]
With this, in a state where the connection port at the outer end of the operation section a is connected to the liquid supply hose H connected to the discharge port of the sprayer, the grip portion 11 of the operation section a is held by hand, The tip H is positioned at a predetermined position while the hose H is being pulled out, and the operation lever 12 is operated so that the chemical ejected from the nozzle 32 provided at the tip C of the tip is dispensed in a direction toward the nozzle 32. I try to spray.
[0007]
In this spraying operation, the spraying direction of the chemical solution from the nozzle 32 of the jetting head c at the tip is changed, for example, as shown in FIG. 1, in a state where the operation lever 12 that grips the operation unit a is located on the lower surface side. When changing the direction in which the chemical liquid is ejected from the nozzle 32 attached to the jetting head c at the tip from the upward direction to the lateral or downward direction, the nozzle tube b is Loosen the tightening of the base cap nut 20 and rotate the nozzle tube b with respect to the operation part a, thereby rotating the jet head c connected and connected to the tip of the nozzle tube b together, This is performed by setting the attached nozzle 32 to a state in which the nozzle 32 is directed laterally or downward.
[0008]
[Problems to be solved by the invention]
The chemical liquid spraying apparatus A of the above-described embodiment holds the grip portion 11 of the operation portion a on the hand side by hand, and discharges the chemical liquid ejected from the nozzle 32 of the jet head c at the tip of the nozzle tube b to the plant pest. When performing a spraying operation in which the spraying is performed at a place where the extermination is to be performed, there is a troublesome problem of changing and adjusting the discharge direction of the chemical solution from the nozzle 32.
[0009]
This is because, in order to change the discharge direction of the chemical from the nozzle 32, the operation of spraying the chemical is temporarily stopped, the valve mechanism is switched to the valve closing position by operating the operation lever 12, and the delivery of the chemical is controlled by the operating unit. In this state, the tightening of the cap nut 20 on the base end side of the nozzle tube b is loosened, and the nozzle tube b is rotated at a desired angle with respect to the operation unit a, thereby discharging the chemical liquid from the nozzle 32. After changing the direction of the operation, the cap nut 20 is tightened to connect the nozzle tube b to the conduit of the operation unit a, and the valve mechanism is opened by operating the operation lever 12 from this state, thereby performing the spraying operation. Is required to restart the spraying operation, and since the spraying operation has to be stopped once, the work efficiency is reduced. Since the change of the discharge direction of the chemical liquid from the nozzle 32 is performed by closing the valve path by closing the valve path, only the direction in which the nozzle 32 protrudes from the jet head c is changed, and the valve mechanism is opened. When the chemical solution is actually ejected, the direction in which the chemical solution is ejected from the nozzle 32 may be different from the desired direction, and the fine adjustment for that requires the same process to be repeated once more. is there.
[0010]
The present invention has been made in order to solve the above-described problem that has occurred in a conventional chemical liquid spraying device, and a chemical liquid is supplied from a nozzle of a jet head provided on a tip side of a nozzle tube by gripping an operation unit. When spraying by spraying, changing the spraying direction of the chemical solution from the nozzle can be performed easily without interrupting the work and without loosening and fastening the cap nut. It is another object of the present invention to provide a new means that can perform the fine adjustment of the jet direction of the nozzle of the jet head while the chemical liquid is jetted.
[0011]
[Means for Solving the Problems]
In the present invention, when forming the spray rod-shaped chemical liquid spraying device by connecting and connecting the gripping portion, the nozzle tube, and the jet head, the connection / connection between the gripping portion and the base end of the nozzle tube is a conventional means. As described above, a cap nut may be used, but the connection between the nozzle tube and the jet head is performed by screwing a male screw fitting provided at the tip of the nozzle tube to a female screw provided at the base end side of the jet head. In a state where the nozzle tube and the jet head are connected, the jet head can be rotated about the axis of the nozzle tube with respect to the nozzle tube by a desired angle amount, and in the rotated position. To be retained.
[0012]
To this end, the male screw fitting provided on the distal end side of the nozzle tube is provided with a shaft tube portion having a diameter smaller than the inner diameter of the nozzle tube continuously provided on the base end side thereof, and an outer tube is provided on the base end side of the shaft tube portion. An enlarged-diameter tube portion whose diameter is increased to correspond to the inner diameter of the nozzle tube is continuously provided, and an O-ring fitting groove is formed on the outer peripheral surface of the enlarged-diameter tube portion, and the O-ring is fitted therein. Put on.
[0013]
Further, the nozzle pipe provided with the male screw fitting on the tip side is formed into a pipe having a predetermined inner diameter from a metal material capable of drawing.
[0014]
Then, the large-diameter tube portion and the shaft tube portion formed on the base end side of the above-described male screw fitting are inserted into the lumen of the opening end portion on the distal end side of the nozzle tube, and the outer periphery of the large-diameter tube portion is fitted. The outer peripheral surface of the fitted O-ring is brought into pressure contact with the inner peripheral surface of the nozzle tube, and thereby the inner cavity of the nozzle tube and the inner cavity of the external thread fitting are connected in a state where watertightness to the outside is maintained.
[0015]
Next, in this state, on the tip side of the nozzle tube, a drawing process is performed to draw the nozzle tube toward the outer peripheral surface of the shaft portion of the male screw fitting. The enlarged diameter cylindrical portion is held, and the male screw fitting is connected to the nozzle tube in a state where rotation around the axis of the nozzle tube is allowed, and this rotation is performed by the water-tight O-ring. Be regulated by the frictional resistance of the contact surface.
[0016]
Then, by this, the jet head rotates against the frictional resistance of the contact surface of the O-ring by applying a circumferential load centered on the axis of the nozzle tube to the nozzle head, and again by releasing the load. The nozzle is held at the rotated position by frictional resistance, and the rotation of the jet head with respect to the nozzle tube changes the jetting direction of the chemical liquid from the nozzle attached to the jet head.
[0017]
According to this means, the spray direction of the chemical solution from the nozzle attached to the spray head is changed to a desired direction based on the gripping portion gripped in a predetermined posture, but without interrupting the spraying operation, the spray head is changed. Can be performed by a simple operation of simply rotating.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The reference numerals used in the description of the embodiments are the same for members having the same configuration as those of the conventional means.
[0019]
FIG. 3 is an overall side view of a chemical solution spraying apparatus A for implementing the means of the present invention. In FIG. 3, a indicates an operation unit, b indicates a nozzle tube, and c indicates a jet head.
[0020]
The grip portion a may be configured in the same manner as the operation portion a in the conventional chemical spraying device A in the form of the spray rod shown in FIGS. 1 and 2, and has a cylindrical shape having a conduit inside. The body 1 is formed with a connection port 10 on the outer end side of the body 1 for connecting the internal conduit to a discharge port of a chemical solution of a separate sprayer via a liquid feed hose H. A grip 11 is formed on the outer periphery of the body 1, and a valve mechanism for controlling the flow of the chemical solution introduced from the connection port 10 is incorporated inside the body 1, and the valve mechanism is closed and opened. An operation lever 12 for operating the operation is supported on the lower surface of the body 1 so as to be rotated by a support shaft 13, and the inner end of the body 1 is connected to the base end of the nozzle tube b. It is of a normal form having a mouth and a male screw 14 for connecting the nozzle tube b. .
[0021]
The nozzle tube b is formed by shaping a rod-shaped pipe from a metal material, and joining the opening end on the base end side to the joint opening provided on the inner end side of the operation unit a, and forming the pipe on the outer periphery on the base end side. Normally, a nut 23 to be fitted in advance is screwed and fastened to the male screw 14 at the inner end of the operation part a to be connected to the operation part a and spliced. In order to attach and hold the male screw fitting w for connection of the portion c by the drawing process of the nozzle tube b, a material and a wall thickness are selected and set so as to enable the drawing process.
[0022]
A male screw fitting w provided at the distal end of the nozzle tube b for mounting the jet head c has an outer diameter on the base end side which is smaller than the inner diameter of the nozzle tube b, as shown in FIGS. A shaft cylinder portion 40 having a slightly smaller diameter is continuously provided, and an enlarged-diameter tube portion 41 having an outer diameter corresponding to the inner diameter of the nozzle tube b is further continuously formed on the outer end side thereof. The outer peripheral surface of the portion 41 is formed into a structure having an annular groove 42 in which the O-ring 5 is fitted.
[0023]
Further, the connection between the male screw fitting w and the nozzle tube b is performed by connecting the shaft cylindrical portion 40 of the male screw fitting w and the enlarged-diameter cylindrical portion 41 continuous thereto with the annular groove on the outer periphery of the enlarged-diameter cylindrical portion 41. In a state in which the O-ring 5 is fitted in the nozzle tube 42, the O-ring 5 is fitted into an inner cavity of the nozzle tube b from an opening on the distal end side thereof, and is located on the distal end side of the nozzle tube b on the outer peripheral side of the shaft cylinder portion 40. The pipe wall of the nozzle pipe b at the position is subjected to a drawing forming process of narrowing down toward the outer peripheral surface of the shaft cylinder section 40 narrowed with respect to the enlarged-diameter cylinder section 41, and by this processing, the pipe wall of the nozzle pipe b becomes The enlarged-diameter cylinder 41 is held by the neck formed by the peripheral surface of the small-diameter shaft cylinder 40, and the male screw fitting w is connected to and held at the tip of the nozzle tube b in a state allowing rotation, As a result, the male screw fitting w is kept watertight with the O-ring 5 from the outside. The rotation with respect to the nozzle tube b is restricted by the frictional force of the contact surface of the O-ring 5 which is connected to and communicates with the inner cavity of the nozzle tube b, and is held at a predetermined rotation position. Rotation is enabled by applying a load.
[0024]
The jet head c is provided with a male screw fitting w provided on the base end side of the body formed hollow so as to be provided with the conduit therein, with the connection port connected to the connection port at the tip of the nozzle pipe b and the tip side of the nozzle pipe. And a female screw 30 for connecting the jet head c to the nozzle tube b by screwing the nozzle head with the nozzle head b. The female screw 30 is fastened to a male screw fitting w of the nozzle tube b by screwing and attaching the nozzle 32 to each of the nozzle tubes b. 3, the direction of operation of the operation unit a is set as a reference so that the injection direction of the chemical liquid from the nozzle 32 is directed upward, opposite to the operation lever 12 provided on the grip unit a, for example, as shown in FIG. Normal one that will be set in a predetermined direction There are those that may be constructed similarly to the conventional.
[0025]
The chemical liquid spraying apparatus A assembled by these means squeezes the operation lever 12 together with one hand holding the operation part a to operate the valve mechanism, and sprays the chemical liquid from the nozzle 32 of the jet head c to perform the spraying operation. When the spray head c is rotated by a desired angle amount with the other hand during the operation, the spray direction of the chemical solution from the nozzle 32 becomes downward as shown in FIG. The direction is changed to a desired direction based on the attitude of the portion a.
[0026]
【The invention's effect】
As described above, in the means of the present invention, the jet head c attached to the tip end side of the nozzle tube b is rotatably connected to the nozzle tube b while being kept watertight by the O-ring 5, and Since the desired rotation position is maintained by friction of the contact surface of the O-ring 5 that maintains the watertightness, the spray head c is rotated with respect to the nozzle tube b during the spraying of the chemical solution. Thus, the change and adjustment of the injection direction of the chemical liquid from the nozzle 32 attached to the injection head c can be performed.
[Brief description of the drawings]
FIG. 1 is a side view of a conventional chemical spraying device in the form of a spray rod.
FIG. 2 is a side view of the nozzle tube.
FIG. 3 is a side view of an apparatus for spraying a chemical solution in the form of a spray rod according to the present invention.
FIG. 4 is a side view of the nozzle tube.
FIG. 5 is a partially broken side view of a tip portion of the nozzle tube in a state before attaching a male screw.
FIG. 6 is a side view, partially broken away, of a tip portion of the nozzle tube in a state where a male screw fitting is attached by drawing forming of the nozzle tube.
FIG. 7 is a side view of the apparatus for dispensing a chemical solution in the form of a spray rod according to the present invention, in a state in which the spray direction of the nozzle is lowered by rotation of the spray head.
[Explanation of symbols]
A: Spraying device, H: Liquid sending hose, a: Operating section, b: Nozzle tube, c: Spout head, w: Male screw fitting, 1 ... Body, 10: Connection port, 11 ... Grip section, 12 ... Operation lever , 13: Support shaft, 14: Male screw, 2a: Connection port, 20: Cap nut, 21: Male screw, 23: Nut, 30: Female screw, 31: Nozzle mounting port, 32: Nozzle, 40: Shaft cylinder Reference numeral 41 denotes an enlarged-diameter cylindrical portion, 42 denotes an annular groove, 5 denotes an O-ring.

Claims (1)

An operation portion a provided with a grip portion 11 on the outer peripheral side and an operation lever 12 for operating a valve mechanism provided inside, a nozzle tube b, and a jet head c provided with a nozzle 32 on the outer peripheral side are connected so as to be joined. In the spray rod-shaped chemical liquid spraying device, a male screw fitting w for mounting a jet head c is provided at the distal end of the nozzle tube b, and a shaft cylinder having a diameter smaller than the inner diameter of the nozzle tube b is provided at the base end thereof. The portion 40 and an enlarged-diameter cylinder 41 having an outer diameter corresponding to the inner diameter of the nozzle tube b are juxtaposed in the projecting direction and protruded. The O-ring 5 is fitted on the outer peripheral surface of the cylindrical portion 41 and inserted into the tube on the distal end side of the nozzle tube b, and the portion corresponding to the axial cylindrical portion 40 on the peripheral wall of the distal end side of the nozzle tube b is formed by drawing. , And a male screw fitting w is rotatably attached to the tip side of the nozzle tube b. Attachment spraying apparatus of the chemical liquid composed.

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