Valve structure and pressure accumulator equipped with same

Abstract

Provided are a valve structure for an accumulator sprayer and an accumulator sprayer provided with the valve structure, the valve structure being capable of suppressing a decrease in spring force and further exhibiting high accumulator performance even if the number of wrenches is increased. A valve structure (A) is used to be attached to a sub-cylinder section (B2) of an accumulator sprayer (X) having a cylinder section (B) having a main cylinder section (B1) and the sub-cylinder section (B2), and a cover section (C) attached so as to cover the cylinder section (B), the accumulator sprayer (X) being attached to a container (J), liquid in the container (J) being sucked to the main cylinder section (B1) via a primary valve (FV), and liquid in the sub-cylinder section (B2) being sucked to the sub-cylinder section (B2) via a secondary valve (FV), and the cover section (C) being attached so as to cover the cylinder section (B). In the present invention, a pressure is applied to a liquid in a master cylinder section (B1), and the liquid is discharged from a nozzle section (F) via a valve structure (A) when the pressure exceeds a predetermined pressure, the valve structure (A) is configured from a spring section (1) and a valve piston section (2) provided separately from the spring section (1), the valve piston section (2) is provided with a spring attachment section (24), the spring section (1) is attached to the spring attachment section (24), and the spring section (1) is attached to the valve piston section (2). The spring part (1) presses the valve piston part (2) in the vertical direction, and the spring part (1) has higher rigidity than the valve piston part (2).

Description

Technical Field

[0001] The present invention relates to a valve structure of a pressure storage sprayer and a pressure storage sprayer having the valve structure. More specifically, the present invention relates to a valve structure of a pressure storage sprayer that can suppress the decrease in spring force due to use and can exert a high pressure storage performance that is not lower than that of a spring made of polypropylene and a pressure storage sprayer having the valve structure. Background Art

[0002] At present, pressure storage sprayers equipped with a trigger for spraying liquid are widely known.

[0003] The structure of the pressure storage sprayer is that the piston slides toward the cylinder by pulling the wrench to apply pressure to the liquid in the cylinder. When the pressure exceeds a certain level, the liquid in the cylinder is violently ejected from the nozzle.

[0004] More specifically, the structure is: the cylinder is arranged in the middle of two one-way valves (that is, the primary valve and the secondary valve). When the liquid in the cylinder introduced through the primary valve is pressurized to a certain pressure or above, the valve core and the valve seat of the secondary valve are opened to open the valve, and the liquid is violently squeezed out of the cylinder and sprayed to the outside through the nozzle.

[0005] In this case, the valve core of the secondary valve is always pressed to the valve seat by the elastic force exerted by the spring. When the liquid pressure in the cylinder exceeds the elastic force when the primary valve is closed, the secondary valve opens and the liquid passes through violently.

[0006] Liquid is ejected from the nozzle, releasing the pressure in the cylinder. As a result, the elastic force is greater than the liquid pressure, and the spring presses the valve core against the valve seat, thereby closing the secondary valve again.

[0007] As described above, the pressure storage sprayer equipped with a wrench can spray the liquid in the cylinder violently to the outside, and is very practical.

[0008] As such a pressure storage type sprayer, for example, the applicant has developed several pressure storage type sprayers.

[0009] For example, the invention described in Patent Document 1 is a trigger-type sprayer for sucking up liquid in a container and spraying it, wherein the trigger-type sprayer has a secondary valve that opens and closes by means of the pressure of the liquid, and the secondary valve has a secondary valve piston portion and an inverted dome-shaped dome spring portion for applying force to the secondary valve piston portion.

[0010] The same is true for the invention described in Patent Document 2.

[0011] Prior art literature

[0012] Patent literature:

[0013] Patent Document 1: Japanese Patent Application No. 2020-219863

[0014] Patent Document 2: Japanese Patent Application No. 2020-219864 Summary of the invention

[0015] Problem that the invention aims to solve

[0016] In the sprayer in which the valve element and the spring are integrated as in the inventions described in Patent Documents 1 and 2, synthetic resin is used as the material of the valve element and the spring.

[0017] In this case, as the accumulator sprayer is used for a longer time, the number of times the lever is pulled increases, which puts a burden on the synthetic resin that performs the spring function.

[0018] The accumulation of load will cause plastic deformation of the synthetic resin, resulting in a decrease in the spring force and failure to fully exert the spring force.

[0019] In addition, due to the characteristics of synthetic resins, it is difficult for springs to exert a storage pressure exceeding a certain level.

[0020] Specifically, if a stronger spring force is to be exerted, a hard synthetic resin must be used. On the other hand, if a hard synthetic resin is used, the movement of the valve core will be reduced, thereby affecting the opening and closing of the valve.

[0021] Therefore, it is difficult to achieve high pressure accumulation required for ejecting more liquid.

[0022] Here, high pressure storage performance means that the valve is opened by high pressure, the flow path of the liquid is opened widely by sufficient movement of the valve core, and the valve is closed quickly after the liquid is ejected.

[0023] The present invention has been developed to solve the above-mentioned problems.

[0024] That is, an object of the present invention is to provide a valve structure of a pressure storage type sprayer which can suppress a decrease in spring force even when the number of times a lever is pulled increases, thereby being able to exhibit high pressure storage performance, and a pressure storage type sprayer having the valve structure.

[0025] Solutions for solving problems

[0026] After in-depth research, the inventors found that the above problem can be solved by independently providing a spring part and a valve piston part that functions as a valve core in the valve structure, and the spring part presses the valve piston part in the vertical direction, and the spring part has a higher stiffness than the existing valve piston part. The present invention is completed based on this discovery.

[0027] The present invention relates to a valve structure, which is installed in a sub-cylinder portion of a pressure storage sprayer having a cylinder body portion and a cover portion for use, wherein the cylinder body portion has a main cylinder portion and a sub-cylinder portion, and the cover portion is installed in a manner covering the cylinder body portion, wherein the pressure storage sprayer is installed in a container, and the liquid in the container is sucked into the main cylinder portion via a primary valve, and pressure is applied to the liquid in the main cylinder portion, and when a certain pressure is exceeded, the liquid is ejected from the nozzle portion via the valve structure, and the valve structure is composed of a spring portion and a valve piston portion independently arranged from the spring portion, and the valve piston portion has a spring mounting portion, and the spring portion is mounted on the spring mounting portion, and the spring portion presses the valve piston portion in a vertical direction, and the spring portion has a higher rigidity than the valve piston portion.

[0028] The present invention is the valve structure according to the above aspect, wherein the spring portion is formed of metal, and the valve piston portion is formed of resin.

[0029] The present invention is the valve structure according to the above aspect, wherein the spring portion is a coil spring formed of SUS.

[0030] The present invention is a valve structure according to the above scheme, wherein the spring portion is a disc spring, the spring mounting portion is composed of a base, a core rod portion erected on the base, and a corner portion connecting the base and the core rod portion, and the spring portion is placed on the base.

[0031] The present invention is a valve structure according to the above scheme, wherein the spring portion is in an inverted dome shape, the spring mounting portion is composed of a base portion and a core rod portion erected on the base portion, and the spring portion is placed on the top end of the core rod portion.

[0032] The present invention is a valve structure according to the above aspect, wherein the spring portion is composed of a top plate portion and a leaf spring portion hanging down from the top plate portion, and the spring mounting portion has a mortar portion provided in a mortar shape, and the leaf spring portion is placed on the mortar portion.

[0033] The present invention is a valve structure according to the above scheme, wherein the spring portion is composed of a top plate portion, a wavy leaf spring portion hanging down from the top plate portion, and a bottom plate portion arranged at the top end of the leaf spring portion, and the spring mounting portion is a cylinder open at the top, and the bottom plate portion is placed on the spring mounting portion.

[0034] The present invention is a pressure storage type sprayer, wherein the pressure storage type sprayer includes the valve structure described in the above aspect.

[0035] In addition, the present invention may be a suitable combination of the above-mentioned aspects.

[0036] Effects of the Invention

[0037] In the valve structure of the present invention, the spring portion is mounted on the spring mounting portion, whereby the spring portion functioning as a spring and the valve piston portion functioning as a valve element can be provided separately.

[0038] Therefore, the spring portion and the valve piston portion can have different characteristics in terms of rigidity.

[0039] In addition, the spring portion presses the valve piston portion in the vertical direction, and the spring portion has a higher rigidity than the valve piston portion, so that the valve piston portion can be sufficiently pressed by the spring portion, and a high pressure storage property can be exhibited.

[0040] In the valve structure of the present invention, the spring portion is formed of metal and the valve piston portion is formed of resin, whereby the spring portion can sufficiently press the valve piston portion.

[0041] In the valve structure of the present invention, the spring portion is a disc spring formed of SUS, thereby increasing the restoring force of the spring portion. When the liquid pressure in the secondary valve decreases due to the liquid being ejected from the nozzle portion, the spring portion immediately presses the valve piston portion to close the secondary valve.

[0042] According to this, the pressure storage type sprayer including the valve structure has excellent responsiveness.

[0043] Here, the responsiveness means that in the pressure storage sprayer, when the pull of the trigger portion is interrupted, the valve is immediately closed and the spraying of the liquid stops.

[0044] Furthermore, since the spring portion is a coil spring, the spring force of the spring portion can be easily changed, and the responsiveness of the pressure storage type sprayer can be easily changed.

[0045] In the valve structure of the present invention, the spring mounting portion is composed of the base portion and the core rod portion erected on the base portion, thereby accurately positioning the spring portion and pressing the valve piston portion.

[0046] Therefore, the spring portion can fully exert the pressing force.

[0047] Furthermore, since the corner portion connecting the base portion and the core rod portion is provided, the spring portion abuts against the corner portion, and the spring portion can be accurately positioned, and the spring force of the spring portion can be uniformly applied to the valve piston portion.

[0048] According to this, the secondary valve can be reliably closed, and the responsiveness of the pressure storage type sprayer can be improved.

[0049] Furthermore, since the spring portion is a coil spring, the spring force of the spring portion can be easily changed, and the responsiveness of the pressure storage type sprayer can be easily changed.

[0050] In the valve structure of the present invention, the spring portion is in an inverted dome shape, thereby increasing the return speed of the spring portion, and the secondary valve can be quickly closed when the pull of the lever portion is interrupted.

[0051] Therefore, responsiveness is improved.

[0052] In addition, the spring mounting portion is composed of a base portion and a core rod portion erected on the base portion, and the spring portion is placed on the tip of the core rod portion, whereby the spring portion can press the valve piston portion without deviation.

[0053] Therefore, the opening and closing of the secondary valve is stable, and as a result, the liquid ejection of the accumulator sprayer is stable.

[0054] In the valve structure of the present invention, the spring portion is composed of a top plate portion and a leaf spring portion hanging down from the top plate portion, and the spring mounting portion has a mortar portion arranged in a mortar shape, and the leaf spring portion is placed on the mortar portion, thereby the spring portion can press the valve piston portion without deviation.

[0055] Therefore, the opening and closing of the secondary valve is stable, and as a result, the liquid ejection of the accumulator sprayer is stable.

[0056] In the valve structure of the present invention, the spring portion is composed of a top plate portion, a wavy leaf spring portion hanging down from the top plate portion, and a bottom plate portion arranged at the top end of the leaf spring portion. The spring mounting portion is a cylinder open at the top, and the bottom plate portion is placed on the spring mounting portion, thereby transmitting the elastic force exerted by the spring portion in a surface manner at the upper and lower ends of the spring portion.

[0057] Therefore, the spring portion can press the valve piston portion without deviation.

[0058] Therefore, the opening and closing of the secondary valve is stable, and as a result, the liquid ejection of the accumulator sprayer is stable.

[0059] The pressure storage type sprayer of the present invention includes the valve structure described above, thereby achieving high pressure storage performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 It is a cross-sectional view showing the pressure storage type sprayer according to the first embodiment.

[0061] Figure 2 To enlarge the Figure 1 A cross-sectional view of a valve structure.

[0062] Figure 3 It is a perspective view showing the valve piston portion according to the first embodiment.

[0063] Figure 4 It is a perspective view showing the spring portion according to the first embodiment.

[0064] Figure 5 This is an explanatory diagram showing the inner peripheral wall of the sub-cylinder portion.

[0065] Figure 6 This is an enlarged cross-sectional view showing the valve structure of the second embodiment.

[0066] Figure 7 It is a perspective view showing a valve piston portion according to the second embodiment.

[0067] Figure 8 It is a perspective view showing a spring portion according to the second embodiment.

[0068] Fig. 9 This is an enlarged cross-sectional view showing a valve structure according to a third embodiment.

[0069] Fig.10 It is a perspective view showing a valve piston portion according to a third embodiment.

[0070] Fig.11 It is a perspective view showing a spring portion according to a third embodiment.

[0071] Fig.12 This is an enlarged cross-sectional view showing a valve structure according to a fourth embodiment.

[0072] Fig.13 It is a perspective view showing a valve piston portion according to a fourth embodiment.

[0073] Fig.14 It is a perspective view showing a spring portion according to a fourth embodiment. DETAILED DESCRIPTION

[0074] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings as needed.

[0075] It should be noted that the same elements in the drawings are marked with the same reference numerals, and repeated descriptions are omitted.

[0076] In addition, unless otherwise specified, positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings.

[0077] Furthermore, the dimensional ratios of the drawings are not limited to the ratios shown in the drawings.

[0078] (First embodiment)

[0079] The pressure storage sprayer X of the present invention is installed in the container J, and the liquid in the container J is sucked into the main cylinder part B1 through the primary valve FV, and pressure is applied to the liquid in the main cylinder part B1. When the liquid pressure exceeds a certain pressure, the liquid is violently sprayed out from the nozzle part F through the valve structure A.

[0080] Figure 1 It is a cross-sectional view showing the pressure storage type sprayer X according to the first embodiment.

[0081] in addition, Figure 2 To enlarge the Figure 1 A cross-sectional view of a valve structure A.

[0082] The pressure storage sprayer X includes a nozzle portion F, a cylinder portion B (including a main cylinder portion B1, a sub-cylinder portion B2, a first channel portion P1, a second channel portion P2, and a third channel portion P3, etc.), a piston portion D, a cover portion C, a wrench portion E, a primary valve FV, a secondary valve, an introduction pipe H, a wrench return spring I, and a cover portion G.

[0083] The cylinder body portion B is a portion having a channel for liquid flow, and comprises: a main cylinder portion B1, which accommodates the piston portion D; a first channel portion P1, which is used to introduce the liquid in the container J into the main cylinder portion B1; a second channel portion P2, which is used to introduce the liquid from the main cylinder portion B1 into the sub-cylinder portion B2 for assembling the valve structure A; and a third channel portion P3, which is used to introduce the liquid from the sub-cylinder portion B2 into the nozzle portion F.

[0084] The introduction pipe H is cylindrical and is fitted under the cylinder portion B.

[0085] The introduction pipe H communicates with the main cylinder portion B1 via the first passage portion P1.

[0086] The main cylinder B1 is a cylindrical member. A piston D is inserted into the main cylinder B1. The piston D slides in the main cylinder B1 in conjunction with the operation of the wrench E.

[0087] A primary valve FV is provided between the main cylinder portion B1 and the first passage portion P1.

[0088] The primary valve FV is a one-way valve that allows the liquid to pass from the first passage portion P1 into the main cylinder portion B1.

[0089] The main cylinder portion B1 communicates with the sub-cylinder portion B2 via the second passage portion P2.

[0090] The sub-cylinder portion B2 is formed in a cylindrical shape with an upper opening. The valve structure A is mounted on the sub-cylinder portion B2.

[0091] Specifically, the bottom of the sub-cylinder portion B2 serves as a lower support portion B23 that supports the valve structure A, and the valve structure A is placed on the lower support portion B23.

[0092] As will be described later, the inner wall of the sub-cylinder portion B2 functions as a valve seat, and the valve piston portion 2 of the valve structure A, more specifically, the inner skirt portion 23 functions as a valve element, thereby forming a so-called secondary valve.

[0093] A longitudinal groove portion B21 and a through hole B22 described later are provided on the nozzle portion F side of the sub-cylinder portion B2, and the through hole B22 communicates with the third passage portion P3.

[0094] It should be noted that a flange portion is provided at the lower end of the cylinder body portion B (see Figure 1 ), the flange portion is clamped by the upper end portion of the container J and the cover portion G, thereby fixing the pressure storage sprayer X to the container J.

[0095] The cover portion C is mounted so as to cover the cylinder portion B as a whole.

[0096] When the cover portion C is mounted on the cylinder portion B, a space is created between the cover portion C and the sub-cylinder portion B2 of the cylinder portion B, and the valve structure A is mounted in the space.

[0097] The cover portion C is provided with an upper support portion C1 for supporting the valve structure A.

[0098] The upper support portion C1 is a portion of the inner upper wall of the cover portion C that supports the upper end of the spring portion 1 .

[0099] Figure 3 It is a perspective view showing the valve piston portion 2 according to the first embodiment.

[0100] in addition, Figure 2 It is a perspective view showing the spring portion 1 according to the first embodiment.

[0101] When the valve piston portion 2 moves upward, the spring portion 1 Figure 2 As shown, the valve piston 2 contacts the upper support portion C1. When the valve piston 2 continues to move upward, the spring portion 1 is deformed, thereby exerting a pressing force on the valve piston 2.

[0102] The valve structure A is composed of a spring portion 1 and a valve piston portion 2 which is provided independently of the spring portion 1 .

[0103] The valve piston portion 2 has a base portion 24 a , and a cylindrical core rod portion 21 is provided standing upward from the base portion 24 a substantially at the center of the base portion.

[0104] The base portion 24 a is further provided with a corner portion 24 b that connects the base portion 24 a and the core rod portion 21 .

[0105] The core rod portion 21 , the base portion 24 a , and the corner portion 24 b constitute the spring mounting portion 24 .

[0106] Specifically, the core rod 21 is inserted through the coil-shaped spring portion 1 from the bottom, and the spring portion 1 is placed on the base portion 24 a , whereby the spring portion 1 and the valve piston portion 2 are attached to each other.

[0107] The spring mounting portion 24 is composed of a base portion 24 a and a corner portion 24 b . The spring portion 1 is positioned by contacting with the corner portion 24 b , whereby the spring portion 1 can press the valve piston portion 2 in an accurately positioned state.

[0108] Therefore, the spring portion 1 can fully exert the pressing force and exhibit high pressure storage performance.

[0109] In addition, the spring portion 1 is positioned in contact with the corner portion 24b, so that the spring force of the spring portion 1 is uniformly applied to the valve piston portion. This ensures that the secondary valve is closed, and the responsiveness of the pressure storage type sprayer X is improved.

[0110] The valve piston portion 2 is provided with an outer skirt portion 22 that continuously extends downward from the periphery of the base portion 24 a .

[0111] Furthermore, an inner skirt portion is formed inside the outer skirt portion 22 and extends downward longer than the outer skirt portion 22 .

[0112] That is, the core rod portion 21 , the outer skirt portion 22 , and the inner skirt portion 23 constitute the valve piston portion 2 .

[0113] The spring portion 1 , which is a spiral spring, is mounted on the spring mounting portion 24 , whereby the elastic force of the spring portion 1 is uniformly applied to the valve piston portion 2 .

[0114] Therefore, the pressing force of the spring portion 1 is accurately transmitted, the axis of the valve piston portion 2 is stabilized, and lateral vibration during vertical movement is prevented.

[0115] Furthermore, since the spring portion 1 is a spiral spring, the spring force of the spring portion 1 can be easily changed, and the responsiveness of the pressure storage type sprayer X can be easily changed.

[0116] The spring part 1 is preferably made of a material having excellent rigidity, and specifically, metals such as SUS, high carbon steel wire (SWC), and piano wire are preferably used. In particular, SUS is preferably used for the spring part 1 from the perspective of corrosion resistance and heat resistance.

[0117] By using these materials, the restoring force of the spring portion 1 is increased, and when the liquid pressure in the secondary valve drops due to the liquid being ejected from the nozzle portion, the spring portion 1 immediately presses the valve piston portion 2 to close the secondary valve.

[0118] Therefore, the pressure storage type sprayer X including the valve structure A has excellent responsiveness.

[0119] Furthermore, the material of the valve piston portion 2 is preferably a synthetic resin material such as PP resin or polyethylene resin.

[0120] At this time, regarding the materials of the spring part 1 and the valve piston part 2, the material of the spring part 1 is made to have higher rigidity than the material of the valve piston part 2, and the spring part 1 presses the valve piston part 2 in the vertical direction, thereby allowing the spring part 1 to fully press the valve piston part 2 and exert a high pressure storage capacity.

[0121] In addition, in the pressure storage sprayer X, the core rod portion 21 between the spring portion 1 and the outer skirt portion 22 is formed into a cylindrical shape between the spring portion 1 and the outer skirt portion 22, so that when the valve structure A moves up and down, there is no part that contacts the wall surface of the sub-cylinder portion B2, and the movement will not be hindered, and the valve structure A can smoothly open and close the valve.

[0122] The outer skirt portion 22 and the inner skirt portion 23 are both formed in a tapered shape with the diameter increasing downward toward the outside.

[0123] As will be described later, the outer skirt portion 22 performs a sealing function, and the inner skirt portion 23 functions as a valve element.

[0124] The upper end of the core rod portion 21 is open and has a center hole 21 b formed therein.

[0125] In addition, the periphery of the open center hole 21b is convex, forming a cylindrical protrusion 21a.

[0126] That is, the center hole 21 b and the cylindrical protrusion 21 a are formed substantially at the center of the spring portion 1 .

[0127] The valve structure A functions as a valve element, and the cylindrical protrusion 21 a functions as a stopper of the valve structure A as described later.

[0128] In the pressure storage sprayer X, the valve piston portion 2 is provided with the center hole 21 b which is open upward, thereby making it possible to reduce the weight of the valve structure A.

[0129] In addition, when the valve structure A is pressed, the shaft can be prevented from bending.

[0130] In the pressure storage sprayer X, the valve structure A is mounted on the sub-cylinder B2. As described above, the sub-cylinder B2 is a cylindrical shape with an upper opening, and the outer skirt 22 and the inner skirt 23 are mounted so as to press the inner wall of the sub-cylinder B2.

[0131] At this time, the lower support portion B23 is formed at the bottom of the sub-cylinder portion B2, and the valve structure A is placed on the lower support portion B23.

[0132] The spring portion 1 is supported by the upper support portion C1 of the cover portion C.

[0133] The upper support portion C1 of the cover portion C is a portion of the inner wall of the cover portion C against which the spring portion 1 abuts.

[0134] The cover portion C is provided with a convex stopper portion C2 at a position corresponding to the cylindrical protrusion 21 a.

[0135] The stopper C2 is used to restrict the valve structure A from moving upward.

[0136] In addition, a groove for abutting the spring portion 1 is formed in an annular shape with the stopper portion C2 as the center in the upper support portion C1.

[0137] As a result, the stopper portion C2 abuts against the cylindrical portion 21 , thereby restricting the upward movement of the valve piston portion 2 . At the same time, the spring portion 1 fits into the groove and deforms, thereby being able to exert a sufficient pressing force on the valve piston portion.

[0138] Figure 5 It is an explanatory diagram showing the inner peripheral wall of the sub-cylinder portion B2.

[0139] A plurality of concave longitudinal grooves B21 are provided at regular intervals on the inner peripheral wall of the sub-cylinder portion B2. The plurality of concave longitudinal grooves B21 extend in all directions in the up-down direction on the inner peripheral wall of the sub-cylinder portion B2.

[0140] A through hole B22 leading to the third channel portion P3 is provided at the bottom of the longitudinal groove portion B21 provided at a position corresponding to the third channel portion P3 located on the nozzle portion F side. No through hole B22 is provided in the longitudinal groove portion B21 other than the position corresponding to the nozzle portion F.

[0141] Between the longitudinal groove portions B21, the inner wall functions as a pillar.

[0142] According to this, even when pressure is applied to the valve piston portion 2 , the periphery of the longitudinal groove portion B21 does not deform, and the valve piston portion 2 can slide smoothly.

[0143] The third passage portion P3 is provided at a certain distance from the bottom portion of the sub-cylinder portion B2.

[0144] Specifically, it is provided at a height of 2 mm to 3 mm from the bottom.

[0145] Accordingly, a time difference occurs when the handle E is rotated from the initial state, the fluid pressure in the main cylinder B1 increases, causing the valve piston 2 to start moving, until the inner skirt 23 passes through the through hole B22 and the secondary valve opens.

[0146] Therefore, a state is created in which liquid does not spray out even when the handle E is turned (so-called "play"), and the usability of the pressure storage sprayer X is improved.

[0147] Here, refer to Figure 1 The flow of liquid when the liquid is sprayed using the pressure storage sprayer X will be described.

[0148] The liquid flows in the order of container J, inlet pipe H, first channel part P1, primary valve FV, main cylinder part B1, second channel part P2, auxiliary cylinder part B2, longitudinal groove part B21 (through hole B22), third channel part P3, and nozzle part F, and is ejected to the outside from nozzle part F.

[0149] In the initial state, the primary valve FV and the secondary valve are closed, and the liquid is filled from the introduction pipe H to the sub-cylinder portion B2.

[0150] In addition, the wrench portion E is in a state where it is not rotated.

[0151] When the lever E is rotated, the piston D moves in conjunction with the lever E in the main cylinder B1 , and the pressure in the main cylinder B1 increases (is accumulated).

[0152] At this time, the main cylinder portion B1 and the lower space of the valve piston portion 2 are in communication with each other via the second passage portion P2 and are filled with liquid.

[0153] When the liquid pressure increases sufficiently, the valve piston portion 2 moves upward so as to be pushed up by the liquid pressure, and the spring portion 1 is pressed and deformed.

[0154] When the valve structure A continues to move upward due to the liquid pressure, the cylindrical protrusion 21 a comes into contact with the stopper C2 as described above, whereby the movement of the valve structure A is restricted.

[0155] As a result, the valve structure A reaches the top dead center, and the deformation of the spring portion 1 is suppressed within a certain range.

[0156] At this time, the spring portion 1 is fitted into the groove provided in the cover portion C and continues to deform.

[0157] When the valve piston portion 2 rises sufficiently, the through hole B22 of the vertical groove portion B21 communicates with the third channel portion P3 , and the liquid moves toward the nozzle portion F.

[0158] At this time, the liquid is in a state of being pressurized, and therefore is violently ejected from the nozzle portion F to the outside.

[0159] It should be noted that, at this time, the primary valve FV is closed.

[0160] The liquid is ejected, and thereby the liquid pressure from the main cylinder portion B1 to the nozzle portion F decreases. When the elastic force of the spring portion 1 exceeds the liquid pressure, the valve piston portion 2 is pressed downward.

[0161] When the piston portion D is pressed downward, the inner skirt portion 23 covers the third passage portion P3, and the secondary valve is closed.

[0162] In addition, the wrench portion E returns to the initial position due to the spring force of the wrench return spring I.

[0163] In conjunction with the reverse movement of the wrench portion E, the piston portion D moves in the main cylinder portion B1, and negative pressure is generated in the main cylinder portion B1, so that the primary valve FV opens.

[0164] At this time, since the container J is communicated with the inside of the main cylinder B1, the liquid is sucked from the container J into the main cylinder B1 through the introduction pipe H and the first passage P1 by negative pressure.

[0165] When the negative pressure state in the main cylinder B1 is eliminated due to the inflow of the liquid, the primary valve FV is closed and the movement of the liquid stops.

[0166] It should be noted that at this time, the secondary valve (valve structure A) is in the closed valve state as described above.

[0167] According to this, the pressure storage type sprayer X returns to the initial state.

[0168] At this time, both the primary valve FV and the secondary valve are closed, and the liquid is filled from the introduction pipe H to the sub-cylinder portion B2.

[0169] It should be noted that the material of the base body B having the main cylinder portion B1 and the sub-cylinder portion B2 described above is preferably PP resin (polypropylene resin) or the like.

[0170] By providing the pressure storage type sprayer with the valve structure A of this embodiment, high pressure storage performance can be achieved.

[0171] (Second embodiment)

[0172] Hereinafter, a second embodiment of the present invention will be described, and portions overlapping with the first embodiment will be omitted.

[0173] Figure 6 This is an enlarged cross-sectional view showing a valve structure A according to the second embodiment.

[0174] in addition, Figure 7 It is a perspective view showing the valve piston portion 2 according to the second embodiment.

[0175] in addition, Figure 8 It is a perspective view showing the spring portion 1 according to the second embodiment.

[0176] In the second embodiment, the spring portion 1 is in an inverted dome shape, and the spring mounting portion 24 is composed of a base portion 24 a and a core rod portion 21 erected on the base portion 24 a . The spring portion 1 is placed on the tip of the core rod portion 21 and thereby mounted on the valve piston portion 2 .

[0177] In the second embodiment, the spring portion 1 and the piston valve portion 2 are uniform in the circumferential direction, so the spring portion 1 can press the valve piston portion 2 without deviation.

[0178] As a result, the opening and closing of the secondary valve is stabilized, and as a result, the liquid discharge from the pressure accumulator sprayer X is stabilized.

[0179] In addition, the spring portion 1 has an inverted dome shape, whereby the return speed of the spring portion 1 is increased, and when the pull of the lever portion E is interrupted, the secondary valve is immediately closed.

[0180] Therefore, responsiveness is improved.

[0181] (Third embodiment)

[0182] Hereinafter, a second embodiment of the present invention will be described.

[0183] The parts overlapping with the first embodiment and the second embodiment are omitted.

[0184] Fig. 9 This is an enlarged cross-sectional view showing a valve structure according to a third embodiment.

[0185] in addition, Fig.10 It is a perspective view showing the valve piston portion 2 according to the third embodiment.

[0186] in addition, Fig.11 It is a perspective view showing the spring portion 1 according to the third embodiment.

[0187] In the third embodiment, the spring portion 1 is composed of a top plate portion 1C and a leaf spring portion 1D suspended from the top plate portion 1C.

[0188] The spring attachment portion 24 has a mortar portion 24 c provided in a mortar shape, and the leaf spring portion 1D is placed on the mortar portion 24 c , whereby the spring portion 1D is attached to the valve piston portion 2 .

[0189] The top plate portion 1C is in surface contact with the upper support portion C1 and is pressed.

[0190] Moreover, since the leaf spring portion 1D presses the mortar portion 24 c , the spring portion 1 can press the piston valve portion 2 without deviation.

[0191] Therefore, the opening and closing of the secondary valve is stabilized, and as a result, the liquid discharge from the accumulator type sprayer X is stabilized.

[0192] In the third embodiment, the spring portion 1 is preferably made of POM resin.

[0193] According to this, the spring portion 1 can have a rigidity not lower than that of a spring made of polypropylene resin.

[0194] Alternatively, the spring portion 1 can be manufactured by injection molding.

[0195] In addition, the valve piston portion 2 is the same as that of the first embodiment.

[0196] (Fourth embodiment)

[0197] Hereinafter, a fourth embodiment of the present invention will be described.

[0198] The parts overlapping with the first to third embodiments are omitted.

[0199] Fig.12 This is an enlarged cross-sectional view showing a valve structure A according to the fourth embodiment.

[0200] in addition, Fig.13 It is a perspective view showing the valve piston portion 2 according to the fourth embodiment.

[0201] in addition, Fig.14 It is a perspective view showing the spring portion 1 according to the fourth embodiment.

[0202] In the fourth embodiment, the spring portion 1 is composed of a top plate portion 1E, a corrugated leaf spring portion 1F hanging down from the top plate portion 1E, and a bottom plate portion 1G provided at the tip of the leaf spring portion.

[0203] The spring mounting portion 24 is in a cylindrical shape with an upper side open, and the spring portion 1 is mounted on the valve piston portion 2 by placing the bottom plate portion 1G thereon.

[0204] The top plate portion 1E is in surface contact with the upper support portion C1.

[0205] In addition, the bottom plate portion 1G is also in surface contact with the valve piston portion 2 in the same manner.

[0206] As a result, the elastic force exerted by the spring portion is transmitted in a surface manner at the upper end (top plate portion 1E) and the lower end (bottom plate portion 1G) of the spring portion 1 .

[0207] In summary, the spring portion 1 can press the piston valve portion 2 without deviation.

[0208] Therefore, the opening and closing of the secondary valve is stabilized, and as a result, the liquid discharge from the accumulator type sprayer X is stabilized.

[0209] In the fourth embodiment, the spring portion 1 is preferably made of POM resin.

[0210] According to this, the spring portion 1 can have a rigidity not lower than that of a spring made of polypropylene resin.

[0211] Alternatively, the spring portion 1 can be manufactured by injection molding.

[0212] As mentioned above, although the preferred embodiment of the present invention has been described, the present invention is not limited to the above-mentioned embodiment.

[0213] The shapes of the spring portion 1 and the valve piston portion 2 are not limited to those in the above-described embodiment, and any appropriate shape may be adopted as long as the spring portion 1 can be pressed against the valve piston portion 2 .

[0214] Industrial Applicability

[0215] The valve structure A of the present invention is preferably used for a pressure storage type sprayer X equipped with a wrench.

[0216] Furthermore, the pressure storage type sprayer X including the valve structure A of the present invention can exhibit high pressure storage performance and can be widely used for liquid spraying.

[0217] Description of Reference Numerals

[0218] X: Pressure storage sprayer

[0219] A: Valve structure

[0220] 1: Spring part

[0221] 1C, 1E: Top plate

[0222] 1D, 1F: Leaf spring part

[0223] 1G: Bottom plate

[0224] 2: Valve piston

[0225] 21: Mandrel

[0226] 21a: tubular protrusion

[0227] 21b: Center hole

[0228] 22: Outer skirt

[0229] 23: Inner skirt

[0230] 24: Spring mounting part

[0231] 24a: Base

[0232] 24b: Corner

[0233] 24c: Mortar Department

[0234] B: Cylinder body

[0235] B1: Main cylinder

[0236] B2: Auxiliary cylinder

[0237] B21: Vertical groove

[0238] B22: Through hole

[0239] B23: Lower support

[0240] C: Hood

[0241] C1: Upper support

[0242] C2: Stopper

[0243] D: Piston

[0244] E: Wrench

[0245] F: Nozzle

[0246] G: cover

[0247] H: Introduction tube

[0248] I: Return spring for wrench

[0249] J: Container

[0250] FV: Primary Valve

[0251] P1: Channel 1

[0252] P2: Second channel

[0253] P3: The third channel.

Claims

1. A valve structure, the valve structure being mounted on a sub-cylinder portion of a pressure storage sprayer having a cylinder portion and a cover portion for use, the cylinder portion having a main cylinder portion and the sub-cylinder portion, the cover portion being mounted in a manner covering the cylinder portion, wherein: The pressure storage sprayer is installed in a container, and the liquid in the container is sucked into the main cylinder through a primary valve, and pressure is applied to the liquid in the main cylinder. When the pressure exceeds a certain value, the liquid is sprayed out from the nozzle through a valve structure. The valve structure is composed of a spring portion and a valve piston portion which is independently provided from the spring portion. The valve piston portion includes the spring mounting portion, The spring portion is mounted on the spring mounting portion, The spring portion presses the valve piston portion in a vertical direction. The spring portion has a higher rigidity than the valve piston portion.

2. The valve structure according to claim 1, wherein: The spring portion is formed of metal, The valve piston portion is formed of resin.

3. The valve structure according to claim 2, wherein: The spring portion is a coil spring formed of SUS.

4. The valve structure according to claim 1, wherein: The spring portion is a coil spring, The spring mounting portion is composed of a base, a core rod portion erected on the base, and a corner portion connecting the base and the core rod portion. The spring portion is placed on the base portion.

5. The valve structure according to claim 1, wherein: The spring portion is in an inverted dome shape, The spring mounting portion is composed of a base and a core rod portion erected on the base. The spring portion is placed on the tip of the core rod portion.

6. The valve structure according to claim 1, wherein: The spring portion is composed of a top plate portion and a leaf spring portion hanging down from the top plate portion. The spring mounting portion has a mortar portion configured in a mortar shape, The leaf spring portion is placed on the mortar portion.

7. The valve structure according to claim 1, wherein: The spring portion is composed of a top plate portion, a corrugated leaf spring portion hanging down from the top plate portion, and a bottom plate portion provided at the top end of the leaf spring portion. The spring mounting portion is in the shape of a cylinder with an upper opening. The bottom plate portion is placed on the spring mounting portion.

8. A pressure storage sprayer, wherein: The pressure storage sprayer includes the valve structure according to any one of claims 1 to 7.

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