JP2553840B2 - Accumulation type manual sprayer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION 3-1 Industrial Field of the Invention The present invention is such that a piston packing is slidably fitted into each of an appropriate number of cylinders arranged inside and outside in a chemical liquid tank. The present invention relates to a pressure-accumulation type human-power sprayer in which an operator can arbitrarily select each piston diameter according to his / her physical strength and fatigue level and can easily reach a predetermined pressure with a liquid chemical with the same operating force.

3-2 Conventional Technology As shown in FIG. 3, for example, a conventional pressure-accumulation type human-powered spraying machine has a cap 2 fixed on the inside of the center of the upper end of a body 1, and a female screw is engraved on the female screw. A male screw 4 engraved on the outer peripheral edge of the lower part is detachably screwed, and a handle 6 is attached to the upper end of an elevating rod 5 that passes through the center of the lid 3 so that it can be moved up and down, while a piston tip with a cross-shaped cross section inside the lower end. The upper portion of the metal fitting 7 is fitted and fixed, the lower portion of the piston tip metal fitting 7 is penetrated through the piston packing 8 having an inverted U-shaped cross section, the ring 9 is loosely fitted in the penetrating portion, and the split pin 10 is provided below the ring 9. Is inserted near the lower end of the piston tip fitting 7, and further wound around the lower outer peripheral edge of the lifting rod 5, the coil spring 11 pulls the piston tip fitting 7 and the lid 3 together when the lifting rod 5 is pulled up widely. Have a function as a buffer so that they do not come into direct contact with each other. Cylinder 12 that accommodates the piston packing 8 so that it can slide
Fix and hang down the discharge valve chamber 13 with an L-shaped cross section at the center of the lower end of
A discharge port 14 at the upper end of the discharge valve chamber 13 is opened and closed by a spherical discharge valve 15. When the pressure is accumulated, the handle 6
As the piston packing 8 slides up and down, the air in the cylinder 12 is pressurized, the discharge valve 15 is pushed up, and the body 1 is discharged through the discharge port 14.
By discharging the liquid inside, the pressure in the body 1 is gradually increased and accumulated, and the chemical liquid in the body 1 is jetted / sprayed from the tip of an injection nozzle (not shown) toward the object to be sprayed under a predetermined pressure.

3-3 Problem to be Solved by the Invention In the pressure-accumulation type human-powered spraying machine as described above, since the diameter of the cylinder is constant, the pressure inside the body gradually increases as the handle is moved up and down. It becomes a resistance against time, and an operator requires a lot of labor and time to reach the maximum pressure. For the operator, when the cylinder diameter is large and the operating force is excessive, the operator is very tired, which makes it extremely difficult or impossible to reach the desired maximum pressure. Further, when the cylinder diameter is too small, the operating force is small, but it takes a lot of time to reach the maximum pressure, and there is a drawback that workability is deteriorated.

The present invention has been proposed in view of the above-mentioned drawbacks, and its object is to fit piston packings to slidably contact with each of the cylinders arranged inside and outside the chemical liquid tank. An object of the present invention is to provide a pressure-accumulation type human-power sprayer capable of easily reaching and holding a predetermined pressure of a chemical liquid with the same operating force by arbitrarily selecting a cylinder diameter as necessary.

3-4 Means for Solving the Problems In order to achieve the above-mentioned object, a pressure-accumulation type human-power sprayer according to the present invention is a pressure-accumulation type in which piston packings having different diameters are stacked in a pump chamber so as to freely move back and forth. In a manual sprayer,
The inner cylinder is retractably stored in an outer cylinder that has a pump chamber that can communicate with the chemical tank via the discharge valve chamber.
A first pressurizer attached to one end of the inner cylinder is faced to the pump chamber, a first engaging / disengaging member is fixed to the other end, and the outside of a retaining piece which is detachably attached to the first engaging / disengaging member under screwing. The press fitting is formed integrally with the press fitting, and the reduced diameter part that is screwed with the press fitting is fixed to the inside of the upper end opening of the body with the reduced diameter part, while the cylindrical part of the inner cylinder is vertically penetrated at the center of the holding piece. A second pressurizer is attached to one end of an elevating rod that moves freely into and out of the hole, fixes the first engagement and disengagement second engagement and disengagement second, and advances and retracts in the inner cylinder. , A handle is attached to the other end in the vicinity of the second engaging / disengaging member, and the first pressurizer penetrates through a cylindrical first piston tip fitting with a first flange and a leg portion of the first piston tip fitting. The outer cylinder and the inner cylinder are loosely engaged with each other and slidably contact with the first flange to separate from the outer cylinder. A first piston packing capable of opening and closing the first cavity into the pump chamber formed between a first ring which is loosely fitted on the leg portion below the most recent of the first piston packing,
The first split pin is provided below the first ring so as to extend laterally and penetrate the leg portion, and the first piston tip fitting is provided with a through hole capable of communicating the pump chamber with one end of the inner cylinder. To do.

3-5 Embodiment Hereinafter, the present invention will be described with reference to FIG. 1 and FIG. 2 as an embodiment in which inner and outer cylinders are coaxially arranged side by side.
The lower surface of the holding metal fitting 23 in which a female screw is engraved on the inner peripheral edge of the reduced diameter portion 22 above the mouthpiece A fixed inside the upper end opening of the body 21 of the body 21, and a male screw b which is screwed into the female screw is engraved on the outer peripheral edge. When the clamp the outer cylinder c ₁ the upper end of fragi 25 through a packing 24 between the inner upper part of the mouthpiece a, the outer cylinder c ₁ is suspended and held in the chemical tank T, also pressing fixture
A holding piece 26 having a male screw j on the outer peripheral edge thereof is formed upright in the upper center of 23, and is vertically formed. At the center of the holding piece 26, a through hole h passing vertically is formed in the cylindrical portion of the inner cylinder c ₂ . 27 and the inner side of the bulging portion e below the first engaging and disengaging member 28 formed integrally with the other end (the upper end here, one end will be described later) of the cylindrical portion 27 so as to move up and down. An annular groove g is interposed between the cylindrical portion 27 and the circular groove g.
While the screw is detachably screwed, a female screw n is engraved on the inner peripheral edge of a cavity 29 having a U-shaped cross section formed above the first engaging / disengaging member 28, and a male screw i screwed to this female screw n is formed on the outer peripheral edge. The second engaging and disengaging member 30 engraved in the above is fixed above the lifting rod 31 having a circular cross-section that moves up and down inside the cylindrical portion 27, and the center of the handle 33 is attached to the fixture 32 fixed to the other end of the lifting rod 31. The first cylinder and the _second cylinder are attached to one end (the lower end in this case) of the inner cylinder c ₂ and the elevating rod 31, respectively, and the first and second flazins y ₁ and y ₂ are attached respectively. Insert the upper parts of the two piston tip fittings p ₁ , p ₂
It is fixed, and the leg parts 3 of these first and second piston tip fittings p ₁ and p ₂
4, 35 are respectively in contact with and separated from the first and second flanges y ₁ and y ₂ , respectively, and the first and second piston packings 36 having an inverted U-shaped cross section through the through holes u ₁ and u ₂ . 37, respectively, so that the first and second rings r ₁ and r ₂ loosely fitted in the lower portions of these through holes u ₁ and u ₂ are laterally passed and penetrated to the leg portions 34 and 35, respectively. While the first and second split pins f ₁ and f ₂ are prevented from falling off,
The outer peripheral edges of the second piston packings 36 and 37 are closely fitted to the inner peripheral edges of the outer cylinder c ₁ and the inner cylinder c _{2 so} as to be slidable, and at the center of the lower end of the outer cylinder c ₁ , a cross section L
The letter-shaped discharge valve chamber V is fixed / hanged down, and the spherical discharge valve 38 mounted on the valve seat S is fitted into the opening W that is directed to the upper side of the discharge hole K formed in the discharge valve chamber V. First and second piston packing
The discharge valve 38 is floated from the valve seat S at the time of descending each of 36 and 37, so that the pump chamber Z at the lower end of the outer cylinder c ₁ can be communicated with the chemical liquid tank T, and further between the outer cylinder c ₁ and the inner cylinder c _2. 1st space m ₁ to be inserted in
It is possible to communicate with the pump chamber Z through the outer peripheral edge of p ₁ , the through hole u ₁ , the first ring r ₁ and the through hole p ₀ provided in the first piston tip fitting p ₁ , and the inner cylinder c ₂ and the lifting rod 31 The second cavity m ₂ formed between the inner cylinder c and the second piston packing 37, the through hole u ₂ , the second ring r ₂ , and the through hole p ₀ can be opened and closed in the pump chamber Z. _{2. The} elastic members 39, 40, such as coil springs, which can be wound around the lower edges of the lifting rod 31, respectively, are pressed down when the first and second piston tip fittings p ₁ , p ₂ are pulled up greatly. It has a function as a buffer so as not to directly contact the metal fitting 23 and the first engaging / disengaging member 28. Therefore, the first piston tip fitting p ₁ , the first piston packing 36, the first split pin f ₁ , the first ring r ₁ , the first pressurizer L ₁ , the second piston tip fitting p ₂ , the second piston packing. 37, second split pin f ₂ ,
It is called the second pressurizer L ₂ including the second ring r ₂ . In the figure, 41 is a packing.

3-6 Action In the present invention, the chemical liquid having an appropriate concentration is supplied to the chemical liquid tank T.
After checking the presence or absence of leakage at each part after flowing in and storing in the body 21 of the body, as shown in FIG. 1, the screwing relationship between the first engaging / disengaging piece 28 and the holding metal fitting 23 in the inner cylinder c ₂ is checked. When it is released and the inner cylinder c ₂ is moved up and down with the handle 33, the outer peripheral edge of the first piston packing 36 at the lower end is slidably brought into contact with the inner peripheral edge of the outer cylinder c ₁ and is moved up and down. In order to compress the air inside, the discharge valve 38 of the discharge valve chamber V is floated and released from the valve seat S, and the air is discharged into the body 21, so the pressure in the body 21 gradually rises, and therefore the handle
Although it is necessary to gradually increase the force for lowering the handle 33, continuous lifting operation of the handle 33 becomes extremely difficult or impossible depending on the physical strength and fatigue of the operator. In order to avoid such a situation, as shown in FIG. 2, the first engagement / disengagement member 28 is detached from the second engagement / disengagement member 30 and is screwed into the holding metal fitting 23 to be integrated with the body 21 side. When the handle 33 is moved up and down under the condition that it is connected to, the second piston packing 37 at the lower end of the elevating rod 31 is slidably brought into contact with the lower inner peripheral edge of the inner cylinder c ₂ held at a fixed position and is moved up and down: The air in the second space m ₂ passes through the through hole u ₂ , the second ring r ₂ , and the through hole p _{0 of} the first piston tip fitting p _1.
Through the discharge valve chamber V and then discharged into the body 21 to further raise the pressure. In this case, however, the diameter of the second piston packing 37 is smaller than that of each of the first piston packing 36, so that the operating force of the handle 33 can be small even when the same pressure rise as described above, and the inner cylinder The c ₂ and the lifting rod 31 are connected to the holding metal fitting 23 and the first engaging / disengaging member 28 via the first engaging / disengaging member 28 and the second engaging / disengaging member 30, respectively.
Since they are engaged with each other in a threaded relationship, the inner and outer cylinders c ₂ and c ₁ and the lifting rod 31 can be securely and easily sealed and held, and the axial center can be matched. The first and second piston packings 36 and 37 are respectively the first and second piston tip fittings p ₁ and
Since the legs 34 and 35 of p ₂ are loosely fitted to each other, the inner cylinder c ₂ and the lifting rod 31 can be easily rotated without any resistance when the engagement and disengagement of the engaging and disengaging elements are released.

3-7 Effects According to the present invention, the first pressurizing chamber is attached to one end of the inner cylinder that is retractable in the outer cylinder having the pump chamber, and the first engaging / disengaging ring is attached to the other end. A lifting rod having a first detachable child and a detachable second detachable child fixed therein is housed in the inner cylinder so that it can be moved back and forth.A second pressurizer is attached to one end of this elevator rod and a handle is attached to the other end. Since it is attached, when reaching the predetermined maximum pressure inside the chemical solution tank, inside the outer cylinder of the large-diameter first piston packing that is integrally connected with the inner cylinder by the engagement of the first and second disengagements By moving back and forth, the pressure is raised to a certain level through the pump chamber and the discharge valve chamber, and then the first and second disengagements are disengaged so that the small diameter second piston packing moves back and forth in the inner cylinder as the lifting rod moves back and forth. At the first pressurizer through the through hole of the first piston tip fitting, It is possible to reach the desired maximum pressure in the chemical liquid tank through the discharge chamber and the discharge valve chamber, and at this time, the second piston packing of a smaller diameter than the large diameter first piston packing that slides in the outer cylinder. Since the lifting rod integrated with the handle moves back and forth, the pressure applied by the large-diameter first piston packing can be compared with the operating force of the smaller handle, which is easier than the pressure accumulating means in the conventional pressure accumulator type manual sprayer. Can be operated without causing significant exhaustion of the physical strength of the worker and fatigue, and since the first and second piston packings are loosely fitted to the first and second piston tip fittings, respectively, the outer and inner cylinders It is possible to make a smooth sliding contact in the interior and there is little risk of damage. Moreover, since the first and second pressurizers are of the same form, there is no feeling of complexity when accumulating pressure, and handling is easy. And even the piston Even if one of the packings becomes unusable due to sticking, etc., pressure accumulation work can be performed if other piston packings can be used. By screwing the holding metal fitting to the reduced diameter portion protruding from the base fixed to the upper end of the body, the holding metal fitting can be easily attached to and detached from the body, making it convenient for the user to handle. The cylindrical part of the inner cylinder is loosely fitted in the through hole that extends vertically in the center, so it is possible to reliably guide the lifting and lowering of the inner cylinder, and there is no risk of significantly complicating the structure as a whole, which makes it robust. It can be manufactured for a long time, can be used for a long time, and is economical for the user.In addition, the inner cylinder and the lifting rod have a first metal fitting and a first metal fitting that holds the outer cylinder through the first and second mating jaws. Because they are combined under a threaded relationship, The side and inner cylinders and the lifting rod can be securely and easily sealed and aligned with each other, and the first and second piston packings can be loosely attached to the legs of the first and second piston tip fittings, respectively. Since they are fitted, the inner cylinder and the lifting rod can be easily rotated without resistance when the engaging elements are screwed together or released.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part with a part cut away of an embodiment according to the present invention, FIG. 2 is a vertical cross-sectional view of the main part at the time of accumulating pressure, and FIG. FIG. L ₁ ...... First pressurizer, L ₂ ...... Second pressurizer, T …… Chemical liquid tank,
V ...... discharge valve chamber, Z ...... pump chamber, c ₁ ...... outer cylinder, c ₂ ...... inner cylinder, f ₁ ...... first split pin, f ₂ ...
… Second split pin, m ₁ …… First vacant space, m ₂ …… Second vacant space, p ₀
…… Through hole, p ₁ …… First piston tip fitting, p ₂ …… Second piston tip fitting, r ₁ …… First ring, r ₂ …… Second ring, y ₁
...... First flange, y ₂ ...... Second flange, 28 ...... First disengagement disengagement, 30 ...... Second disengagement disengagement, 31 ...... Elevating rod, 33 ...... Handle, 34,35 ...... Legs , 36 …… First piston packing, 37
...... Second piston packing, 21 …… Body, 22 …… Reduced diameter part, 23 …… Pressing metal fitting, 26 …… Holding piece, 27 …… Cylinder part, A
…… Base, h …… through hole

Claims (3)

(57) [Claims] 1. A pump capable of communicating with a chemical liquid tank (T) through a discharge valve chamber (V) in a pressure-operated human-powered sprayer in which piston packings having different diameters are stacked in a pump chamber. chamber inner cylinder (Z) and comprising an outer cylinder (c ₁₎ (c ₂₎ and movably accommodating, inner cylinder (c ₂₎
The first pressurizer (L ₁ ) attached to one end of the pump chamber (Z)
The first engaging disengagement member (28) on the other end, and the pressing metal fitting (23) on the outside of the detachable holding piece (26) screwed to the first engaging disengagement member (28). The reduced diameter portion (22) which is integrally formed and is screwed with the holding metal fitting (23) is provided with the protruding base (A) and the body (21).
While being fixed inside the upper end opening of the, the cylindrical part (27) of the inner cylinder (c ₂ ) is freely moved forward and backward at the center of the holding piece (26) into the through hole (h) penetrating up and down. The first disengagement child (28) and the second disengagement child (30) which can be freely engaged and disengaged,
And lifting advancing and retracting the inner cylinder (c ₂₎ in the rod (3
1) The second pressurizer (L ₂ ) is attached to one end, and the handle (33) is attached to the other end near the second engaging / disengaging child (30), and the first pressurizer (L ₁ ) is as one flange (y ₁₎ with a cylindrical piston destination bracket (p _1), is penetrated, loosely fitted to the leg portion of the first piston away bracket (p ₁₎ (34), an outer cylinder (c ₁₎ the The sliding contact with the first flange (y ₁ ) and separate it from the _first cylinder (m ₁ ) formed between the outer cylinder (c ₁ ) and the inner cylinder (c ₂ ) to the pump chamber (Z). Openable and closable first piston packing (36) and this first piston packing (3
6) The first ring (r ₁ ) loosely fitted to the leg (34) immediately below, and the first split pin (horizontal and penetrating the leg (34) below the first ring (r ₁ ). f ₁ ), the first piston tip fitting (p ₁ ) is provided with a through hole (p ₀ ) capable of communicating the pump chamber (Z) with one end of the inner cylinder (c ₂ ). Characteristic pressure-type manual sprayer. 2. The pressure-operated manpower sprayer according to claim 1, wherein the inner and outer cylinders (c ₂ ) and (c ₁ ) can be engaged and disengaged with each other in a threaded relationship. 3. The first pressurizer (L ₂ ) comprises a cylindrical second piston tip fitting (p ₂ ) with a second flange (y ₂ ) attached to the lower end of the lifting rod (31), The piston tip fitting (p ₂ ) is penetrated and loosely fitted into the leg part (35) of the piston tip fitting (p ₂ ), and the sliding contact inside the inner cylinder (c ₂ ) makes contact with and separates from the second flange (y ₂ ), and the inner cylinder (c ₂ ). A second piston packing (37) capable of opening and closing a second space (m ₂ ) formed between the lifting rod (31) and the pump chamber (Z), and a position immediately below the second piston packing (37). The second ring (r ₂ ) loosely fitted to the leg (35) with the second split pin (f ₂ ) that is placed horizontally through and penetrates the leg (35) below the second ring (r ₂ ). The pressure-operated human-power sprayer according to claim 1.