Pressure-accumulator sprayers and sprayers

Abstract

To provide a pressure-accumulation sprayer and a spraying method capable of performing continuous spraying without being restricted by the maximum movable width of a trigger. [Solution] A pressure-accumulating sprayer A for spraying liquid in a container 1, comprising a base cylinder 5 that draws liquid from the container 1 through a suction passage 4, a base piston 5a that slides within the base cylinder, a storage cylinder 7 located downstream of the base cylinder, a first flow path P1 that connects the base cylinder to the storage cylinder, a second flow path P2 provided around the storage cylinder, a first valve, a second valve, a nozzle valve, and a storage piston 7a that slides on the other side within the storage cylinder 7; by rotating a trigger T connected to the base piston, the liquid in the base cylinder is sprayed to the outside through the first flow path and the nozzle, and the liquid in the base cylinder is filled into the storage cylinder through the first flow path and the second flow path.

Description

[Technical Field]

[0001] The present invention relates to a pressure-accumulation sprayer and a spraying method, and more particularly to a pressure-accumulation sprayer and a spraying method that allow continuous spraying even after the trigger is fully pulled. [Background technology]

[0002] Sprayers are widely used to spray liquids in containers. Among them, trigger-type sprayers are popular because they are easy to control the spray direction and easy to use.

[0003] Among sprayers, pressure-accumulator sprayers equipped with a first valve and a second valve are particularly useful because they can apply high pressure to the liquid to spray it into a mist continuously for a certain period of time.

[0004] For example, the pressure-accumulator sprayer of Patent Document 1 is a pressure-accumulator sprayer that includes an F valve attached to the bottom of the cylinder, a pressure-accumulator valve attached to a passage in the body, and a pressing spring that presses the pressure-accumulator valve in the valve closing direction, and sprays liquid by rotating the trigger.

[0005] In addition, the pressure-accumulating spray container in Patent Document 2 has a pump section attached to the container body, and uses a pump cylinder that slides when the operating section is operated and a valve mechanism to suck up the liquid in the container, accumulate pressure, and spray it.

[0006] Furthermore, it is convenient for pressure-accumulation sprayers to be able to change the spray direction. For example, Patent Document 3 discloses a pressure-accumulation sprayer in which the nozzle direction of the sprayer can be rotated back and forth or left and right using a connecting means.

[0007] When the pressure-accumulator sprayer is long in the vertical direction, as in Patent Document 3, the stroke width can be increased by making the sliding direction of the piston vertical, thereby improving the amount of spray per spray. On the other hand, if the sliding direction of the piston is vertical, the distance between the fulcrum of the trigger and the fulcrum of the piston becomes longer, and the efficiency of converting the rotation of the trigger into the sliding of the piston decreases.

[0008] In response to this, there is an invention in which the connection between the trigger and the piston is devised so that the rotation of the trigger can be transmitted to the piston more efficiently. For example, the inventions described in Patent Documents 4 and 5 are both pressure-accumulator sprayers that operate a piston using a so-called rack and pinion structure. Others, such as the invention described in Patent Document 6, are equipped with a pressure chamber that can store fluid for one or more strokes of the trigger. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Patent No. 6833361 [Patent Document 2] Japanese Patent Publication No. 2021-123397 [Patent Document 3] U.S. Patent No. 8,967,434 [Patent Document 4] Patent No. 3040722 [Patent Document 5] Japanese Patent Application Publication No. 9-20182 [Patent Document 6] European Patent No. 25666629 Summary of the Invention [Problem to be solved by the invention]

[0010] In typical pressure-accumulator sprayers such as those disclosed in Patent Documents 1 to 6, the movement of a basic piston in a cylinder is performed in conjunction with the rotation of a trigger (operating part). Therefore, the maximum movement of the trigger is directly related to the amount of time that continuous spraying is possible. In other words, the time during which continuous spraying is possible is limited by the maximum movable width of the trigger. If the trigger is pulled slowly, it is possible to spray continuously for a long period of time, but if the trigger is pulled quickly, continuous spraying is not possible.

[0011] The present invention was developed in response to the above-mentioned problems. That is, an object of the present invention is to provide a pressure-accumulation sprayer that is capable of continuous spraying without being restricted by the maximum movable width of the trigger, and a spraying method using the pressure-accumulation sprayer. [Means for solving the problem]

[0012] As a result of extensive research, the inventors have found that the above-mentioned problems can be solved by providing a third valve, providing first and second flow paths each of which is opened and closed by a valve at each end, and accumulating pressure in the liquid in the first and second flow paths by rotating a trigger. The present invention is based on this finding.

[0013] The present invention is a pressure-accumulation sprayer A for spraying liquid in a container 1, and includes a base cylinder 5 that sucks liquid from the container 1 through a suction passage 4, a base piston 5a that slides within the base cylinder 5, a storage cylinder 7 located downstream of the base cylinder 5, a first flow path P1 that connects the base cylinder 5 and the storage cylinder 7, a second flow path P2 provided around the storage cylinder 7, a first valve V1 that opens and closes between the suction passage 4 and the base cylinder 5, and a second valve V2 that opens and closes between the base cylinder 5 and the first flow path P1. The pressure-accumulating sprayer A comprises a base piston (5a), a nozzle valve (5b) that slides on one side of the storage cylinder (7) and opens and closes between the first flow path (P1), the second flow path (P2) and the nozzle (8), and a storage piston (7a) that slides on the other side of the storage cylinder (7), and is characterized in that by rotating a trigger (T) connected to the base piston (5a), the liquid in the base cylinder (5) is sprayed to the outside via the first flow path (P1) and the nozzle (8), and the liquid in the base cylinder (5) is filled into the storage cylinder (7) via the first flow path (P1) and the second flow path (P2).

[0014] The present invention resides in the pressure-accumulation sprayer A described above, which is connected to the container 1 via a ball joint 3.

[0015] The present invention resides in the pressure-accumulation sprayer A described above, characterized in that at least a part of the suction passage 4 is a corrugated tube.

[0016] The present invention resides in the pressure-accumulator sprayer A described above, characterized in that the trigger T and the base cylinder 5 are connected by a rack and pinion, and the trigger T returns to a predetermined position by the restoring force of the extended spring 6.

[0017] The present invention resides in the pressure-accumulator sprayer A described above, characterized in that the base cylinder 5 has an exhaust hole 5c that opens and closes by the sliding of the base piston 5a, and the exhaust hole 5c communicates with the container 1.

[0018] The present invention resides in a spraying method M in which the liquid in the container 1 is sprayed to the outside from the nozzle 8 using the pressure-accumulation sprayer A described above, which includes a filling step S1 in which the liquid in the basic cylinder 5 is filled into the other side of the storage cylinder 7 via the first flow path P1, and a spraying step S2 in which the liquid in the basic cylinder 5 is sprayed to the outside from the nozzle 8 via the first flow path P1 and the second flow path P2, and is characterized in that the filling step S1 and the spraying step S2 are carried out simultaneously.

[0019] The present invention resides in a spraying method M in which the liquid in the container 1 is sprayed to the outside from the nozzle 8 using the pressure-accumulation sprayer A described above, characterized in that the spraying method M sequentially comprises a filling step S1 in which the liquid in the base cylinder 5 is filled into the other side of the storage cylinder 7 via the first flow path P1, and a post-filling spraying step S2 in which the liquid filled in the bottom of the storage cylinder 7 by the spring force 6 of the pressure spring body 9 is sprayed to the outside through the second flow path P2.

[0020] The present invention may also be implemented by appropriately combining the above configurations. [Effects of the Invention]

[0021] The present invention comprises a base cylinder 5 that sucks liquid from a container 1 through a suction passage 4, a base piston 5a that slides within the base cylinder 5, a storage cylinder 7 located downstream of the base cylinder 5, a first flow path P1 that connects the base cylinder 5 and the storage cylinder 7, a second flow path P2 that is provided around the storage cylinder 7, and a storage piston 7a that slides on the other side within the storage cylinder 7. By rotating a trigger T connected to the base piston 5a, the liquid in the base cylinder 5 is sprayed to the outside through the first flow path P1 and the nozzle 8, and the liquid in the base cylinder 5 is filled into the storage cylinder 7 through the first flow path P1 and the second flow path P2, so that the liquid sucked into the storage cylinder 7 can continue to be sprayed even after the trigger T is fully pulled.

[0022] In the present invention, the spray direction can be freely changed by connecting the container 1 via the ball joint 3.

[0023] In the present invention, at least a portion of the suction passage 4 is a corrugated tube, so that even when the spray direction is changed by the ball joint 3 or the distance from the container 1 to the base cylinder 5 changes due to the sliding of the base piston 5a, the suction passage 4 can follow this and suck up the liquid into the base cylinder 5.

[0024] In the present invention, the trigger T and the base cylinder 5 are connected by a rack and pinion, so that the rotation of the trigger T can be efficiently converted into the sliding of the base piston 5a even when the sliding direction of the base piston 5a and the spray direction are not parallel. In addition, in the present invention, the trigger T returns to a predetermined position due to the restoring force of the extended spring 6, making it possible to align the flow direction of the liquid with the sliding direction of the basic piston 5a, and making it possible to circulate the liquid efficiently through the sliding of the basic piston 5a.

[0025] In the present invention, the base cylinder 5 has an exhaust hole 5c that opens and closes with the sliding of the base piston 5a, and since the exhaust hole 5c is connected to the container 1, even if air enters the base cylinder 5, it can be exhausted into the container 1, preventing the flow of liquid from being obstructed.

[0026] The present invention is a spraying method M in which the liquid in the container 1 is sprayed to the outside from the nozzle 8 using the pressure-accumulating sprayer A described above, and includes a filling step S1 in which the liquid in the base cylinder 5 is filled into the bottom of the storage cylinder 7 via the first flow path P1, and a spraying step S2 in which the liquid in the base cylinder 5 is sprayed to the outside from the nozzle 8 via the first flow path P1 and the second flow path P2.By performing the filling step S1 and the spraying step S2 simultaneously, it is possible to continue spraying even after the trigger T is fully pulled. This makes it possible to spray a wide area at once, improving the ease of use of the pressure-accumulator sprayer A.

[0027] The present invention is a spraying method M in which the pressure-accumulator sprayer A described above in 1 is used to spray the liquid in the container 1 to the outside from the nozzle 8, and by sequentially performing a filling step S1 in which the liquid in the base cylinder 5 is filled into the bottom of the storage cylinder 7 via the first flow path P1, and a post-filling spraying step S2 in which the liquid filled at the bottom of the storage cylinder 7 is sprayed to the outside via the second flow path P2 by the spring 6 force of the pressure spring body 9, the pressure-accumulator sprayer A is immediately ready to spray after one spray, making it possible to perform continuous spraying. [Brief explanation of the drawings]

[0028] [Figure 1] FIG. 1 is a vertical cross-sectional view showing a pressure-accumulation sprayer. [Figure 2] FIG. 2 is an enlarged cross-sectional view showing the base cylinder. [Figure 3] FIG. 3 is an enlarged cross-sectional view showing the base cylinder. [Figure 4] FIG. 4 is an explanatory diagram showing the flow of liquid in a pressure-accumulation sprayer. [Figure 5] FIG. 5 is an explanatory diagram showing the sliding of the storage piston. [Figure 6] FIG. 6 is a flow chart illustrating the spraying method of the present invention. [Figure 7] FIG. 7 is a simplified explanatory diagram showing the pressure-accumulator sprayer before spraying. [Figure 8] FIG. 8 is an explanatory diagram showing the filling step and the spraying step in a simplified manner. [Figure 9] FIG. 9 is an explanatory diagram showing a simplified post-filling spraying process. [Figure 10] FIG. 10 is an explanatory diagram showing the suction step in a simplified manner. DETAILED DESCRIPTION OF THE INVENTION

[0029] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings as necessary. In the drawings, the same elements are denoted by the same reference numerals, and redundant explanations will be omitted. Furthermore, unless otherwise specified, the positional relationships such as up, down, left, and right will be based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios of the drawings are not limited to those shown in the drawings.

[0030] FIG. 1 is a vertical cross-sectional view showing a pressure-accumulation sprayer A. The pressure-accumulator sprayer A of the present invention is attached to a container 1 that stores liquid, and is a device for spraying the liquid in the container 1 in mist form through a nozzle 8 by rotating a trigger T.

[0031] The pressure-accumulation sprayer A comprises a base portion B and a cap 2, and is attached to a container 1 by screwing via the cap 2 equipped with a ball joint 3. The pressure-accumulating sprayer A is fitted to the base portion B with a base cylinder 5 that sucks liquid from the container 1 through the suction passage 4, a base piston 5a that slides within the base cylinder 5, a storage cylinder 7 located downstream of the base cylinder 5, and a storage piston 7a that slides on the other side within the storage cylinder 7. The base portion B is also provided with a first flow path P1 that connects the base cylinder 5 and the storage cylinder 7, a second flow path P2 that is provided around the storage cylinder 7, and a nozzle 8 that sprays liquid. The base portion B functions as a frame that houses these components.

[0032] The pressure-accumulating sprayer A also includes a first valve V1 that opens and closes between the suction passage 4 and the base cylinder 5, a second valve V2 that opens and closes between the base cylinder 5 and the first flow path P1, and a nozzle valve V3 that slides on one side within the storage cylinder 7 and opens and closes between the first flow path P1 and the second flow path P2 and the nozzle 8.

[0033] The first valve V1 is provided at the tip of the base piston 5a so as to be integrated with the base piston 5a. In the normal state where the trigger T is not pulled, the first valve V1 closes the passage between the suction passage 4 and the inside of the base cylinder 5. The second valve V2 is a check valve in the shape of a truncated cone that widens on the downstream side, and the large-diameter portion on the downstream side is the free end. The second valve V2 abuts against the inner wall of the base cylinder 5 in a normal state, thereby closing the gap between the base cylinder 5 and the first flow path P1 provided downstream of the base cylinder 5. The nozzle valve V3 is provided between the first flow path P1 and the nozzle 8, and in a normal state, the flow path to the nozzle 8 is closed by inserting a rod-shaped part therein. As will be described later, in a normal state, the nozzle valve V3 is biased together with the storage cylinder 7 by the biasing spring body 9 in the valve closing direction.

[0034] The container 1 is suitably made of synthetic resin or the like. The liquid stored in the container 1 may be any type, such as a household or commercial detergent, as long as it is sprayed in mist form. The mouth of the container 1 is threaded so that a cap 2 can be attached.

[0035] The cap 2 is attached to the mouth of the container 1 by, for example, screwing. When the cap 2 is attached to the container 1, the tip of the suction passage 4 is immersed in the liquid in the container 1. The cap 2 is provided with a ball joint 3 . The suction passage 4 is provided so as to pass through the ball joint 3. Therefore, even if the orientation of the pressure-accumulation sprayer A is changed by the ball joint 3, the liquid can still be sucked up from inside the container 1. The pressure-accumulation sprayer A is connected to the container 1 via a ball joint 3, so that the orientation of the nozzle 8, that is, the spray direction, can be freely changed. This improves usability.

[0036] FIG. 2 is an enlarged cross-sectional view showing the base cylinder 5. As shown in FIG. Indicates that the trigger T is not pulled. The foundation cylinder 5 is cylindrical, and is fitted with a foundation piston 5a that slides within the foundation cylinder 5. As described above, the foundation piston 5a slides within the foundation cylinder 5 as the trigger T rotates. The trigger T is provided so that a user can pull it in by gripping it with their fingers. The trigger T and the base cylinder 5 are connected by a rack and pinion. More specifically, a pinion portion Ta on a gear provided on the trigger T and a plate-shaped rack portion 5b connected to the base cylinder 5 are engaged with each other, and rotation of the trigger T causes the base piston 5a to slide.

[0037] As shown in FIG. 2, in the pressure-accumulating sprayer A of this embodiment, the sliding direction of the basic cylinder 5 and the spray direction from the nozzle 8 are perpendicular to each other, so even if the sliding direction of the basic piston 5a and the spray direction are not parallel, the rotation of the trigger T can be efficiently converted into the sliding of the basic piston 5a. Furthermore, in the pressure-accumulator sprayer A, the sliding direction of the base piston 5a is arranged approximately perpendicular to the spray direction of the liquid, so that the entire pressure-accumulator sprayer A can be made vertically long with a reduced width, thereby achieving space savings.

[0038] The base piston 5a is connected to a spring 6 provided below the base cylinder 5. The spring 6 is a bellows-shaped leaf spring. In a normal state, the base piston 5a is at the bottom dead center and in a predetermined position. In this state, the base piston 5 a is not biased by the spring 6 . When force is applied to the trigger T and the basic piston 5a slides and moves upward due to the rotation of the trigger T, the spring 6 connected to the basic piston 5a extends, and when force is no longer applied to the trigger T and it no longer rotates, the restoring force of the spring 6 moves the basic piston 5a downward and returns it to its specified position. 2, the base piston 5a slides upward, causing the liquid to flow upward, downstream, and the sliding direction of the base piston 5a coincides with the direction of the liquid flow. This allows the liquid to flow efficiently through the sliding of the base piston 5a.

[0039] Also, as shown in the example of Figure 2, the sliding direction of the base piston 5a is arranged approximately perpendicular to the spray direction of the liquid, so the entire pressure-accumulator sprayer A can be made vertically long with a reduced width, thereby saving space.

[0040] In the normal state, the base cylinder 5 is filled with liquid. When the base piston 5a moves upward, the liquid pressure in the base cylinder 5 increases, the free end of the second valve V2 opens, and the liquid in the base cylinder 5 flows into the first flow path P1. When the liquid flows into the first flow path P1 and the liquid pressure in the base cylinder 5 drops, the second valve V2 closes, and the inflow of liquid into the first flow path P1 stops.

[0041] The base cylinder 5 is provided with an exhaust hole 5c communicating with the container 1. The tip of the base piston 5a is sealed by a lip seal 5d whose end is tapered and enlarged in diameter, blocking the exhaust hole 5c and preventing liquid leakage. The inner diameter of the base cylinder 5 is reduced on the downstream side (upper side in FIG. 2), creating a step. When the base cylinder 5 reaches the top dead center, the lip seal 5d is turned up by the step, and the space in the base cylinder 5 where the liquid is stored communicates with the exhaust hole 5c. That is, the exhaust hole 5c opens and closes due to the sliding of the base piston 5a. At this time, excess liquid that has not flowed into the first flow path P1 even when the base piston 5a reaches the top dead center, and air mixed in the liquid, are discharged into the container 1 through the exhaust hole 5c. This prevents the flow of liquid from being obstructed by liquid leakage or air intrusion.

[0042] Furthermore, the space sealed by the lip seal 5d communicates with the container 1, which is a large space, via the exhaust hole 5c. Therefore, the sliding of the base piston 5a does not cause the air to be compressed, or conversely, cause negative pressure, which will not hinder the sliding of the base piston 5a. This allows the base piston 5a to slide smoothly.

[0043] 3 is an enlarged cross-sectional view showing the base cylinder 5. This shows the state in which the trigger T is fully pulled. As the base piston 5a moves downward, negative pressure is created inside the base cylinder 5. This causes the first valve V1 to open, and the liquid is drawn from the container 1 into the base cylinder 5 via the suction passage 4. When the liquid is drawn into the base cylinder 5 and the negative pressure is released, the first valve V1 closes. As a result, the inside of the base cylinder 5 is always filled with liquid under normal conditions. When using a brand new pressure-accumulator sprayer A, for example, when the basic cylinder 5 is not filled with liquid, the trigger T is rotated multiple times to expel the air from the basic cylinder 5 and draw liquid into the cylinder, a so-called blank shot, thereby making the pressure-accumulator sprayer A ready for use.

[0044] The inside of the base cylinder 5 is in communication with the suction passage 4, and is closed by the first valve V1 as described above. A part of the suction passage 4 on the side of the base cylinder 5 is formed by a bellows-shaped corrugated tube. This allows the suction passage 4 to follow the change in spray direction by the ball joint 3 or the change in distance from the container 1 to the base cylinder 5 due to the sliding of the base piston 5a, and suck up the liquid into the base cylinder 5.

[0045] The storage cylinder 7 is provided downstream of the first flow path P1 and upstream of the nozzle 8. As described above, the nozzle valve V3 is provided on one side of the storage cylinder 7, closing the gap between the first flow path P1 and the nozzle 8. In addition, the storage piston 7a is provided on the other side of the storage cylinder 7. The nozzle valve V3 and the storage piston 7a are urged outward from the storage cylinder 7 by the pressure spring body 9 provided between them.

[0046] FIG. 4 is an explanatory diagram showing the flow of liquid in the pressure-accumulation sprayer A. When the liquid flows into the storage cylinder 7 from the first flow path P1, part of the liquid presses the nozzle valve V3 and overcomes the pressing force of the pressure spring body 9. This causes the liquid to flow to the nozzle 8 and spray from the nozzle 8 to the outside.

[0047] Meanwhile, the remainder of the liquid that has flowed in from the first flow path P1 flows into the second flow path P2 that is connected to the first flow path P1. A plurality of second flow paths P2 are provided around the periphery of the storage cylinder 7, and each second flow path P2 is connected to a storage piston 7a that is provided on the other side of the storage cylinder 7. The liquid that has flowed into the second flow path P2 pushes the storage piston 7a toward the inside of the storage cylinder 7 (upward in FIG. 4), and the liquid pressure overcomes the pressing force of the pressure spring body 9, so that the storage cylinder 7 is filled with liquid.

[0048] FIG. 5 is an explanatory diagram showing the sliding of the storage piston 7a. When the trigger T is pulled all the way, the liquid is sprayed from the nozzle 8, causing the liquid pressure to drop. Then, the pressure spring body 9 presses the nozzle valve V3 in the valve closing direction (upward in FIG. 4), and at the same time presses the storage piston 7a outward (downward in FIG. 4). As a result, the liquid filled in the storage cylinder 7 is pushed out by the storage piston 7a and flows into the nozzle valve V3 side via the second flow path P2, pressing the nozzle valve V3 in the valve opening direction. This causes spraying from the nozzle 8 to continue.

[0049] When the liquid in the storage cylinder 7 flows out, the pressure accumulation in the first flow path P1 and the second flow path P2 is released and the nozzle valve V3 closes. Moreover, the first flow path P1 and the second flow path P2 are filled with liquid.

[0050] The pressure spring body 9 is made up of multiple spring pieces 9a. Each spring piece 9a has the same shape and is made up of a pair of disk-shaped flat portions 9aa and a connecting portion 9ab that connects the flat portions 9aa. In this embodiment, the two flat portions 9aa are connected by three arch-shaped connecting portions 9ab. The spring pieces 9a are arranged between the storage piston 7a and the nozzle valve V3 with their disk portions oriented in the same direction so that they are in contact with each other, thereby pressing the storage piston 7a and the nozzle valve V3 in directions away from each other (i.e., toward the outside of the storage cylinder 7). Because the connecting portion 9ab is arch-shaped, the pressure of the pressure spring body 9 is efficiently exerted.

[0051] The pressure spring body 9 is made up of spring pieces 9a, and presses the storage piston 7a and the nozzle valve V3 simultaneously, so that the spring force of the spring pieces 9a is exerted equally on each other, the nozzle valve V3, and the storage piston 7a, allowing them to press against each other equally. Therefore, it is possible to efficiently open and close the nozzle valve V3 and accumulate pressure in the second flow path P2. Furthermore, since all the spring pieces 9a have the same shape, it is possible to easily adjust the force of the spring 6 and easily perform maintenance when part of the pressure spring body 9 is damaged. Therefore, the maintainability is improved.

[0052] Below, the flow of liquid in each of the above-mentioned parts will be summarized, and a series of liquid flows in the pressure-accumulation sprayer A of the present invention and the liquid spraying method M using the pressure-accumulation sprayer A will be explained.

[0053] FIG. 6 is a flow chart showing the spraying method M of the present invention. The spray method M includes a filling step S1 in which the liquid in the basic cylinder 5 is filled into the other side of the storage cylinder 7 via the first flow path P1 and the second flow path P2, a spraying step S2 in which the liquid in the basic cylinder 5 is sprayed to the outside from the nozzle 8 via the first flow path P1, a post-filling spraying step S2 in which the liquid filled in the other side of the storage cylinder 7 is sprayed to the outside via the second flow path P2 by the force of the spring 6 of the pressure spring body 9, and a suction step S4 in which the liquid in the container 1 is sucked into the basic cylinder 5 via the suction passage 4. By rotating the trigger T, the filling step S1 and the spraying step S2 are carried out simultaneously, and then the post-filling spraying step S2 and the suction step S4 are carried out in sequence.

[0054] In a normal state, the base cylinder 5 is filled with liquid. When starting to use the pressure-accumulator sprayer A, the trigger T is rotated with the tip of the suction passage 4 in contact with the liquid in the container 1, which is called blank spraying. When the trigger T returns from the squeezed state to the normal state, the basic piston 5a in the basic cylinder 5 slides downward, and liquid is drawn from the container 1 into the basic cylinder 5 via the suction passage 4 and the first valve V1. The first valve V1 opens when negative pressure is created inside the basic cylinder 5, and closes when the liquid flows into the cylinder and the liquid pressure exceeds a certain level.

[0055] FIG. 7 is a simplified explanatory diagram showing the pressure-accumulator sprayer A before spraying. The arrows in FIGS. 7 to 10 indicate the direction of liquid flow or the direction of piston movement. Before spraying, the base piston 5a is away from the second valve V2, and the volume inside the base cylinder 5 is large.

[0056] FIG. 8 is an explanatory diagram showing the filling step S1 and the spraying step S2 in a simplified manner. When the trigger T is pulled in, the base piston 5a slides upward. At this time, the first valve V1 is closed, so the hydraulic pressure in the base cylinder 5 increases. When the liquid pressure in the base cylinder 5 increases, the second valve V2, which is a check valve, opens, and the liquid flows from the base cylinder 5 into the first flow path P1.

[0057] A portion of the liquid that has flowed into the first flow path P1 presses and opens the nozzle valve V3, thereby connecting the first flow path P1 to the nozzle 8, and the liquid is sprayed to the outside from the nozzle 8 by the liquid pressure (spraying step S2).

[0058] The remainder of the liquid that has flowed into the first flow path P1 flows to the other side of the storage cylinder 7 via the first flow path P1 and the second flow path P2, and presses the storage piston 7a. When the liquid pressure overcomes the pressure spring body 9, the storage piston 7a slides and is pushed in, and the liquid is filled into the storage cylinder 7 (filling step S1).

[0059] In this way, by pulling the trigger T, both the filling of the storage cylinder 7 with liquid and the spraying of the liquid to the outside are carried out.

[0060] FIG. 9 is an explanatory diagram showing the post-filling spraying step S3 in a simplified manner. In the above-described filling step S1 and spraying step S2, when the liquid inside the base cylinder 5 is discharged, the second valve V2 is closed. Thereafter, the liquid filled in the other side of the storage cylinder 7 is sprayed to the outside via the second flow path P2 and the nozzle valve V3. That is, the spring force of the pressure spring body 9 moves the storage piston 7a outward (downward in FIG. 9) from the storage cylinder 7. As a result, the liquid on the other side of the storage cylinder 7 is pressurized and sprayed to the outside via the second flow path P2 and the nozzle valve V3. At this time, the second valve V2 is a check valve, so the liquid does not flow back into the base cylinder 5.

[0061] In the spray method M of the present invention, spraying continues even after the trigger T is fully pulled because the liquid is pressurized in the base cylinder 5 and the storage cylinder 7 by the first valve V1, the second valve V2, and the nozzle valve V3 between the container 1 and the nozzle 8. Specifically, the base piston 5a in the base cylinder 5 is linked to the rotation of the trigger T, and the sliding of the base piston 5a accumulates pressure in the base cylinder 5. In the present invention, a pressure accumulation state is generated in the storage cylinder 7 by the pressure spring body 9 between the second valve V2 and the nozzle valve V3. Therefore, even after the liquid flows from the first flow path P1 to the nozzle valve V3 and the pressure accumulation state in the base cylinder 5 is eliminated, spraying can continue until the pressure accumulation state in the storage cylinder 7 is eliminated by spraying from the nozzle 8.

[0062] In the spraying step S2, when the liquid in the second flow path P2 is sprayed to the outside from the nozzle 8, the liquid pressure on the other side of the storage cylinder 7 that is in communication with the second flow path P2 drops. As a result, the elastic force of the pressure spring body 9 overcomes the liquid pressure and presses the liquid through the storage piston 7a. At this time, the second valve V2 is closed, so the hydraulic pressure in the second flow path P2 increases. This liquid pressure opens the nozzle valve V3, allowing the liquid to continue spraying.

[0063] Therefore, in the pressure-accumulating sprayer A of the present invention, the liquid is maintained in a pressure-accumulating state at multiple points in the first flow path P1 and the storage cylinder 7, and continuous spraying from the nozzle 8 is possible even after the trigger T is fully pulled and rotation of the trigger T has ceased. This allows you to spray a wider area at once, improving usability.

[0064] FIG. 10 is an explanatory diagram showing the suction step S4 in a simplified manner. When the trigger T is fully pulled and released, the base piston 5a linked to the trigger T moves downward by the restoring force of the extended spring 6 and returns to a predetermined position. As a result, negative pressure is created inside the base cylinder 5, the first valve V1 opens, and liquid is drawn from the container 1 into the base cylinder 5 via the suction passage 4. In addition, as the base piston 5a returns, the trigger T connected to the base piston 5a by the rack and pinion also returns to a predetermined position. When the base cylinder 5 is filled with liquid, the negative pressure state is eliminated and the first valve V1 closes. This makes the pressure-accumulator sprayer A ready to spray again.

[0065] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments.

[0066] The nozzle 8 may have any diameter and shape. Depending on the desired shape of the spray, the size of the aperture may be adjusted or a structure such as a net may be provided.

[0067] In this embodiment, the pressure spring body 9 is made up of a plurality of spring pieces 9a, but is not limited to this. For example, a single spring coil may be used. In this case, the number of parts can be reduced. Also, the pressure spring body 9 can exert a relatively high pressing force. [Industrial Applicability]

[0068] The pressure-accumulator sprayer A of the present invention can be widely used as a sprayer for home or commercial use when continuous spraying is required. [Explanation of symbols]

[0069] A... Pressure-accumulating sprayer M...Spray Method 1...container 2 Cap 3. Ball joint B... Base 4. Suction passage 5. Base cylinder 5a... Base piston 5b Rack section 5c Exhaust hole 5d... Lip seal 6. Spring 7. Storage cylinder 7a... Storage piston 8 Nozzle 9. Pressure spring body 9a Spring piece 9aa...Flat plate part 9ab...Connection part T···Trigger Ta···Pinion part P1: First flow path P2: Second flow path V1 First Valve V2...Second valve V3 Nozzle Valve S1...Filling process S2: Spray process S3: Post-filling spray process S4: Suction process

Claims

1. A pressure-accumulator sprayer for spraying a liquid in a container, a base cylinder for sucking the liquid from the container through a suction passage; a base piston that slides within the base cylinder; a storage cylinder located downstream of the base cylinder; a first flow path communicating the base cylinder with the storage cylinder; a second flow path provided around the storage cylinder; a first valve that opens and closes between the suction passage and the base cylinder; a second valve that opens and closes between the base cylinder and the first flow path; and a nozzle valve that slides on one side within the storage cylinder and opens and closes between the first flow path and the second flow path and a nozzle. a storage piston sliding on the other side within the storage cylinder; Equipped with By rotating a trigger connected to the base piston, the liquid in the base cylinder is sprayed to the outside through the first flow path and the nozzle, The pressure-accumulating sprayer is characterized in that the liquid in the basic cylinder is filled into the storage cylinder through the first flow path and the second flow path.

2. 2. The pressure-accumulation sprayer according to claim 1, wherein the sprayer is connected to the container via a ball joint.

3. 3. The pressure-accumulation sprayer according to claim 2, wherein at least a portion of the suction passage is a corrugated tube.

4. The trigger and the base cylinder are connected by a rack and pinion, 2. The pressure-accumulation sprayer according to claim 1, wherein the trigger returns to a predetermined position by the restoring force of an extended spring.

5. The base cylinder has an exhaust hole that opens and closes by sliding of the base piston, 2. The pressure-accumulator sprayer according to claim 1, wherein the exhaust port communicates with the container.

6. A spraying method for spraying the liquid in the container to the outside from a nozzle using the pressure-accumulation sprayer according to any one of claims 1 to 5, a filling step of filling the liquid in the base cylinder into the other side of the storage cylinder through the first flow path; a spraying step of spraying the liquid in the base cylinder to the outside from the nozzle through the first flow path and the second flow path; and A spraying method characterized in that the filling step and the spraying step are carried out simultaneously.

7. A spraying method for spraying the liquid in the container to the outside from a nozzle using the pressure-accumulation sprayer according to claim 6, a filling step of filling the liquid in the base cylinder into the other side of the storage cylinder through the first flow path; a post-filling spraying step of spraying the liquid filled in the bottom of the storage cylinder to the outside through the second flow path by the spring force of a pressure spring body; A spraying method characterized by sequentially carrying out the steps above.

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