JP5380445B2 - Pressure control mechanism and spray device for compressed fluid - Google Patents

Description

The present invention relates to a pressure control mechanism and a spraying device for a compressed fluid in which a compressed fluid such as liquefied carbon dioxide filled in a compressed fluid storage container is reduced to a certain pressure and injected.

  2. Description of the Related Art Conventionally, spraying apparatuses that spray sprayed products such as fragrances, pharmaceuticals, and insecticides enclosed in containers using compressed gas pressure are widely used.

  This type of injection device is provided with a pressure control mechanism for controlling the injection pressure to a constant pressure in order to inject the contents sealed in the container at a constant pressure.

  There exists a thing as described in Unexamined-Japanese-Patent No. 2002-114281 (patent document 1) as a spraying apparatus provided with this pressure control mechanism.

In addition, the ejected product and the compressed gas for injection are stored in separate containers, and the content takeout port is located at the position facing the compressed gas ejection hole of the injection control mechanism for controlling the compressed gas injection by reducing the pressure. There is also known a spraying device that uses a suction action (Venturi effect) generated by a jet of compressed gas to suck up the sprayed material stored in a container, pulverize it into a mist, and spray it. Also in this kind of spraying apparatus, there is known one provided with a gas pressure adjusting mechanism that adjusts the injection pressure of the compressed gas to be injected (Japanese Patent Laid-Open No. 2002-59044).
JP 2002-114281 A JP 2002-59044 A

  Incidentally, both the pressure control mechanism described in Patent Document 1 and the gas pressure adjusting mechanism described in Patent Document 2 are provided outside the container filled with compressed gas. It is difficult to further reduce the size of the entire apparatus for adjusting the gas pressure of the gas.

  Therefore, the present invention realizes further miniaturization of the control mechanism itself that controls the pressure reduction of the injection pressure of the compressed fluid such as liquefied carbon dioxide filled in the compressed fluid storage container, and further simplifies the mechanism. It is an object of the present invention to provide a pressure control mechanism and a spray device for a compressed fluid to be obtained.

  Moreover, this invention makes it a technical subject to provide the pressure control mechanism and spray apparatus of a compressed fluid which can control the pressure of the injected compressed fluid with high precision.

  Furthermore, the present invention provides a compressed fluid pressure control mechanism and a spray device capable of improving the hermeticity of a compressed fluid storage container filled with the compressed fluid and preventing leakage of the compressed fluid. Let it be a technical issue.

  The present invention proposed to achieve the technical problem described above is a compressed fluid pressure control mechanism for controlling the pressure of a compressed fluid ejected from a compressed fluid storage container filled with the compressed fluid. Between a first position that is disposed in a compressed fluid storage container filled with fluid and closes a compressed fluid ejection hole provided in the compressed fluid storage container, and a second position that releases the ejection hole. A first urging member that urges the valve body in the direction of a first position that closes the ejection hole, and a compressed fluid that is ejected from the ejection hole. A cylinder part connected to the compressed fluid storage container; a piston that is movably disposed in the cylinder part and that moves the valve body in relation to a part of the valve body protruding from the ejection hole; Direction in which the piston contacts the valve body A second urging member for urging, and a pressure control chamber configured between the piston and the ejection hole and supplied with the compressed fluid ejected from the compressed fluid storage container, and presses the piston By controlling the urging force of the urging second urging member, the pressure of the compressed fluid supplied from the ejection hole to the pressure control chamber is controlled to be reduced.

  Further, the present invention includes an urging member displacing unit that variably controls the displacement amount of the second urging member to control the pressing urging force of the piston, and operates the urging member displacing unit to The pressure of the compressed fluid supplied to the pressure control unit is controlled by controlling the pressing biasing force of the piston.

  Furthermore, in the present invention, the valve body is provided with a further piston that is guided by a movement guide portion provided in the compressed fluid storage container and moves integrally with the valve body. A communication portion is formed therebetween, and an air chamber into which the compressed fluid filled in the compressed fluid storage container flows is formed between the ejection hole closed by the valve body and the further piston.

  The valve body constituting the present invention is a sharp body in which a sealing portion formed so as to reduce in diameter from the proximal end side toward the distal end side is formed on the distal end side, and sealing of the sharp body The ejection holes are closed by fitting the parts.

  Furthermore, the present invention includes an urging force control mechanism that controls the urging force of the second urging member.

  The second urging means includes a compression coil spring, and the urging force control mechanism includes a spring compression operation member that controls the urging force of the compression coil spring by advancing and retracting the compression coil spring.

  The pressure control chamber is formed with a lead-out hole for leading the compressed fluid supplied to the pressure control chamber to the outside.

  The compressed fluid used in the present invention is preferably compressed liquefied carbon dioxide.

  Furthermore, the present invention has a storage container that stores an injection material that is injected by the action of the pressure of the compressed fluid, and that includes an injection control mechanism that controls the injection of the injection material stored in the storage container. A spray device in which a compressed fluid pressure control mechanism for controlling the pressure of a compressed fluid ejected from a compressed fluid storage container filled with a compressed fluid is disposed in the storage container, and is disposed in the storage container. The pressure control mechanism is disposed in the compressed fluid storage container filled with the compressed fluid, and has a first position for closing the ejection hole of the compressed fluid provided in the compressed fluid storage container and a second position for releasing the ejection hole. A valve body that moves between the first position, a first biasing member that biases the valve body in the direction of a first position that closes the ejection hole, and a compressed fluid that is ejected from the ejection hole. Connected to the compressed fluid storage container to be supplied A cylinder part, a piston movably disposed in the cylinder part and operating to move the valve body in relation to a part of the valve body protruding from the ejection hole; and the piston abuts the valve body A second urging member that urges in the direction, a pressure control chamber configured between the piston and the ejection hole, to which compressed fluid ejected from the compressed fluid storage container is supplied, and the pressure control chamber An outlet hole for leading the compressed fluid supplied to the storage container, and controlling the biasing force of the second biasing member that presses and biases the piston, thereby controlling the pressure from the ejection hole. The pressure of the compressed fluid supplied to the control chamber and supplied to the storage container through the outlet hole is controlled to be reduced.

  The storage container is formed of a synthetic resin molding.

  The pressure control mechanism for controlling the pressure of the compressed fluid filled in the compressed fluid storage container according to the present invention controls the injection of the compressed fluid filled in the compressed fluid storage container filled with the compressed fluid. Since the valve body is provided, the device itself can be downsized.

  And in this invention, the piston which moves this valve body linearly moves in the same direction in relation to the valve body which opens and closes the injection hole of the compressed fluid provided in the compressed fluid storage container, and the valve body. Thus, the piston hole is opened and closed to supply the compressed fluid into the pressure control chamber, the force acting on the piston of the compressed fluid supplied to the pressure control chamber, and the piston that presses the valve body in the second position direction. Since the pressure control of the compressed fluid in the pressure control chamber is realized by the urging force acting on the pressure control device, the pressure control of the compressed fluid ejected from the compressed fluid storage container can be easily performed with a simpler mechanism.

  Further, the valve body is provided with a further piston that moves integrally with the valve body, and an air chamber into which the compressed fluid flows is provided between the piston and the ejection hole closed by the valve body, thereby closing the ejection hole. Since the total pressure applied to the valve body can be reduced, the ejection hole can be easily opened and closed with a light force.

  In particular, since the valve body is constituted by a sharp body and the ejection hole is closed only by the sharp body, the total pressure applied to the member closing the ejection hole can be further reduced, so that the ejection hole can be easily opened and closed with a light force. It is possible to control the pressure of the compressed fluid with high accuracy.

  The compressed fluid pressure control mechanism according to the present invention includes an area of a surface on which a compressed fluid of a piston moving in the pressure control chamber acts and a biasing force of a biasing member that biases the piston. Since the pressure of the compressed fluid that is injected into the cylinder is controlled, the pressure control of the compressed fluid can be easily performed with high accuracy.

  Further, the second urging means for urging the piston is constituted by a compression coil spring, and a spring compression operation mechanism for controlling the urging force of the compression coil spring by controlling the urging force of the compression coil spring is provided. Since the force can be adjusted, the pressure of the compressed fluid ejected from the compressed fluid storage container can be freely changed.

  The pressure control mechanism for a compressed fluid according to the present invention includes a compressed fluid storage container filled with a compressed fluid in a projectile storage container that stores a jetted product to be injected. The device can be configured.

  Furthermore, since the present invention can supply the pressure-controlled compressed fluid to the storage container that stores the sprayed product that is directly jetted, it is possible to further reduce the size of the jetting device.

Furthermore, the storage container storing the ejected material is supplied with a compressed fluid controlled at a constant pressure, and the supply of the compressed fluid above a certain pressure is regulated, so that the inside of the storage container is overpressured. Can be prevented, and the safety of the storage container can be secured. Then, by forming the storage container with a synthetic resin molding, the appearance of the storage container can be freely selected, and mass production can be easily realized.

FIG. 1 is a cross-sectional view showing a spray apparatus using a pressure control mechanism according to the present invention. FIG. 2 is an assembled perspective view showing main elements constituting the pressure control mechanism. FIG. 3 is a cross-sectional view showing a valve body provided on the gas cartridge side. FIG. 4 is a cross-sectional view of the spray device showing a state in which the carbon dioxide gas compressed from the gas cartridge is supplied to the pressure control chamber and the sprayed matter stored in the storage container can be injected. FIG. 5 is a cross-sectional view of the pressure control mechanism showing a state in which the valve body is pressed by the first piston pressed by the urging force of the second coil spring to open the gas ejection hole. FIG. 6 shows that the first piston receives the pressure of carbon dioxide injected into the pressure control chamber and moves in a direction in which the valve body separates, and the valve body is fitted into the gas ejection hole to close the gas ejection hole. It is sectional drawing of the pressure control mechanism which shows the state which carried out.

DESCRIPTION OF SYMBOLS 1 Spraying device, 3 Storage container, 5 Injection control mechanism, 6 Pressure control mechanism, 7 Carbon dioxide gas, 8 Gas cartridge, 9 Valve body, 13 Gas ejection hole, 16 Sealing part,
17 first piston, 18 second piston, 19 coil spring, 22 gas filling chamber, 23 pressure control chamber, 24 piston housing, 28 cylinder portion, 29 housing body, 30 coil spring, 31 spring pressure adjusting member, 32 holding cap 38 Gas outlet hole, 41 Valve housing, 42 Stem, 43 Valve member, 47 Injection nozzle, 54 Valve hole

  Embodiments of a pressure control mechanism for a compressed fluid to which the present invention is applied will be described below with reference to the drawings.

  The pressure control mechanism of a compressed fluid to which the present invention is applied is used, for example, in a spray device that jets a spray such as a fragrance, a medicine, and an insecticide using the pressure of a compressed fluid, such as carbon dioxide. . In the following embodiments, an example in which the present invention is applied to a spray device will be described.

  As shown in FIG. 1, a spray device 1 that uses a pressure control mechanism for a compressed fluid to which the present invention is applied includes a storage container 3 that stores a spray 2 to be injected. The ejected material 2 stored in the storage container 3 may be any material that can be injected using the pressure of compressed high-pressure carbon dioxide gas. , Insecticides, and powdery insecticides. The storage container 3 is formed into a bottomed cylindrical shape using a metal material such as aluminum or a synthetic resin material. A mechanism mounting portion 4 that protrudes in a cylindrical shape is integrally formed on the upper portion of the storage container 3, and the present invention, together with the injection control mechanism 5 that controls the injection of the ejected material 2 through the mechanism mounting portion 4, provides the present invention. The applied pressure control mechanism 6 is attached.

Here, the pressure control mechanism 6 to which the present invention is applied will be described. The pressure control mechanism 6 controls the compressed fluid stored in the compressed fluid storage container so as to be injected at a constant pressure. A gas cartridge 8 is provided as a compressed fluid storage container filled with compressed carbon dioxide gas 7 compressed and liquefied as a compressed fluid. The gas cartridge 8 is formed to have a strength sufficient to be filled with the carbon dioxide gas 7 compressed to a pressure of 70 to 80 kg / cm ² . In this example, it is formed into a bottomed cylindrical shape using aluminum.

  A valve body case 10 in which a valve body 9 for controlling the injection of the carbon dioxide gas 7 filled in the gas cartridge 8 is disposed on the opening 8a side of the gas cartridge 8 is attached. As shown in FIG. 3, the valve body case 10 includes a case main body 11 formed in a cylindrical shape, and a sealing plate portion 12 provided so as to close the opening on the upper end side of the case main body 11. The sealing plate portion 12 is provided with a gas ejection hole 13 for ejecting the compressed carbon dioxide gas 7 filled in the gas cartridge 8. As will be described later, the gas ejection hole 13 is opened and closed by a valve body 9 that is movably disposed in the case body 11.

  The valve body case 10 is attached to the gas cartridge 8 by fitting the case body 11 so as to be inserted into the gas cartridge 8 from the opening 8a. At this time, the valve body case 10 is attached by positioning the attachment position with respect to the gas cartridge 8 by bringing the flange portion 14 protruding from the outer peripheral side of the sealing plate portion 12 into contact with the upper end surface of the gas cartridge 8. .

  As shown in FIG. 1, the valve case 10 attached to the gas cartridge 8 is supported at the outer peripheral edge of the flange portion 14 by a support cap 15 screwed to the outer periphery on the upper end side of the gas cartridge 8. Thus, the gas cartridge 8 is attached so as not to be detached.

  And in the case main body 11, the valve body 9 which opens and closes the gas ejection hole 13 is arrange | positioned so that a movement is possible. As shown in FIGS. 2 and 3, the valve body 9 is a pointed body in which a sealing portion 16 formed so as to reduce in diameter from the proximal end side toward the distal end side is formed on the distal end side. Is formed. The sealing portion 16 formed in the valve body 9 is a portion that fits into the gas ejection hole 13 and seals the gas ejection hole 13, and is contracted from the shaft portion 9 a side on the proximal end side toward the distal end side. It is formed as a tapered portion so as to have a diameter.

  As shown in FIG. 3, the gas ejection hole 13 into which the sealing portion 16 is fitted is formed as a straight through hole. By forming the gas ejection hole 13 as a straight through-hole, when the tapered sealing portion 16 is fitted into the gas ejection hole 13, the base side having a diameter larger than that of the distal end side is the gas ejection hole 13. The gas ejection hole 13 can be reliably sealed by being in close contact with the periphery of the opening end on the insertion side.

  As shown in FIGS. 2 and 3, the sealing portion 16 is formed with such a length that the tip portion can protrude from the gas ejection hole 13 by a predetermined amount when the gas ejection hole 13 is closed. That is, the sealing portion 16 is inserted into the gas ejection hole 13, and the middle portion of the inclined surface whose diameter gradually increases from the distal end side toward the proximal end side is fitted into the gas ejection hole 13 and locked. At this time, the front end of the sealing portion 16 is formed to have a length protruding from the gas ejection hole 13 by a predetermined amount.

  And the part which protruded from the gas ejection hole 13 of the sealing part 16 is used as the press operation part 27 operated by the 1st piston 17 which advances and retracts the valve body 9 with respect to the gas ejection hole 13 so that it may mention later.

Further, the valve body 9 formed as a sharp body is supported by a second piston 18 that is a further piston that moves in the case body 11 with the case body 11 as a movement guide portion, and the inside of the valve body case 10 is moved inside. Moving. That is, the valve body 9 is supported by the second piston 18 on the base end side, and moves in the direction indicated by the arrows Y ₁ and Y _{2 in} FIG. The valve body case 10 is movably disposed. The valve body 9 is integrated with the second piston 18 to release the fitting of the sealing portion 16 from the first position where the sealing portion 16 is fitted and the gas ejection hole 13 is closed. It moves between the second positions where the ejection holes 13 are released.

The valve body 9 is moved and urged in the direction of the arrow Y _{1 in} FIG. 3 by a first coil spring 19 that is a first urging member disposed between the second piston 18 and the case body 11. Has been. That is, the valve body 9 is fitted with the gas ejection hole 13 with the sealing portion 16 formed in a tapered shape while being biased by the first coil spring 19, and closes the gas ejection hole 13.

As shown in FIGS. 2 and 3, the first coil spring 19 is fitted to the locking step portion 18 a formed in the middle portion of the second piston 18 and the base end portion side of the case body 11. by being disposed in a compressed state between the spring support member 20, the sealing portion 16 biases fitted in FIG arrow Y ₁ direction direction to seal the gas ejection holes 13 Yes.

  By the way, the gas ejection hole 13 provided in the valve body case 10 is closed only by the tapered sealing portion 16 provided in the valve body 9 formed as a pointed body. That is, the valve body 9 is in a state in which movement is restricted in a state in which a midway portion of the sealing portion 16 formed in a tapered shape is fitted in the gas ejection hole 13. Therefore, as shown in FIG. 1, the second piston 18 attached to the base end side of the valve body 9 is positioned in the middle of the case body 11 and is in a state of floating in the case body 11. ing. That is, when the second piston 18 is in a state in which the tapered sealing portion 16 formed in the valve body 9 is fitted into the gas ejection hole 13 and the gas ejection hole 13 is closed, the second piston 18 In a state of being separated from each other, it is formed in such a size that a certain space is formed between the gas ejection holes 13.

A compressed fluid flow path is formed between the outer peripheral surface of the second piston 18 that slides in contact with the inner peripheral surface of the case main body 11 and the inner peripheral surface of the case main body 11 as shown in FIG. A plurality of groove portions 21 are formed. These groove portions 21 are formed continuously from the proximal end portion side to the distal end portion side of the second piston 18. By forming such a groove portion 21, the carbon dioxide gas 7 filled in the gas cartridge 8 is formed between the distal end surface of the second piston 18 and the gas ejection hole 13 through the groove portion 21 while being vaporized. The space is filled. Therefore, the space formed between the second piston 18 and the gas ejection hole 13 is a gas filling chamber 22. In this manner, the compressed carbon dioxide gas 7 is also filled in the gas filling chamber 22, so that the pressure of the compressed carbon dioxide gas 7 is applied to the valve body 9 and the second piston 18 almost on the entire outer peripheral side. It will work equally. Therefore, the valve body 9 and the second piston 18 can freely move in the valve body case 10. Here, the valve body 9, a state where the sealing portion 16 receives the 3 arrow Y ₁ direction biasing force of the first coil spring 19 is fitted to the gas ejection holes 13, and closing the gas ejection holes 13 To maintain.

  Thus, the gas ejection hole 13 is closed by moving and energizing the valve body 9 built in the gas filling portion filled with the compressed carbon dioxide gas 7 by using the energizing force of the first coil spring 19. In the gas cartridge 8 configured as described above, by selecting the spring pressure of the first coil spring 19, the urging force for urging the valve body 9 in the direction to close the gas ejection hole 13 is varied, and the gas ejection hole 13 is The urging force is varied to open.

  As described above, the gas cartridge 8 including the valve body 9 that controls the ejection of the compressed carbon dioxide gas 7 as the compressed fluid filled in the gas cartridge 8 has the pressure of the carbon dioxide gas 7 ejected from the gas cartridge 8. It is connected to a piston housing 24 that constitutes a pressure control chamber 23 that controls the pressure by reducing the pressure.

  Therefore, the valve case 10 that is integrally attached to the gas cartridge 8 is provided with a connecting portion 26 for connecting to the piston housing 24. The connecting portion 26 functions as a gas passage for supplying the carbon dioxide gas 7 injected from the ejection hole 13 to the piston housing 24 side, and is formed in a cylindrical shape protruding around the ejection hole 13. Yes. The front end side of the valve element 9 protruding from the gas ejection hole 13 is exposed inside the connecting portion 26. A portion protruding into the connecting portion 26 of the valve body 9 is a pressing operation portion 27 that is pressed by the first piston 17 disposed in the piston housing 24.

  On the other hand, the piston housing 24 is formed as a cylindrical tube body, and a cylinder portion 28 in which a first piston 17 that opens and closes the valve body 9 is housed so as to be able to advance and retract is provided in a lower portion. Further, in the housing main body 29 formed on the upper side of the piston housing 24, a second urging member that applies a urging force in a direction of pressing the valve body 9 against the first piston 17 is provided. A coil spring 30 and a spring pressure adjusting member 31 for adjusting the biasing force by compressing the second coil spring 30 are disposed. The spring pressure adjusting member 31 is supported by a holding cap 32 attached to the mechanism attaching portion 4 of the storage container 3, and is prevented from coming off from the housing body 29. The holding cap 32 has a first screw portion 33 formed on the inner peripheral surface, and the first screw portion 33 is screwed onto and attached to a second screw portion 34 formed on the outer peripheral surface of the mechanism mounting portion 4. As a result, the mechanism mounting portion 4 is moved forward and backward by being rotated. The holding cap 32 is operated to advance and retract with respect to the mechanism mounting portion 4, thereby operating the spring pressure adjusting member 31 to adjust the compression rate of the second coil spring 30. Adjust the biasing force.

  As shown in FIG. 1, the spring pressure adjusting member 31 is formed in a cylindrical shape, and an injection control mechanism 5 that controls the injection of the injection 2 stored in the storage container 3 is disposed therein. The

  Further, a connection receiving portion 35 to which the gas cartridge 8 is connected is provided at the lower end portion of the piston housing 24. The connection receiving portion 35 is formed in a cylindrical shape having a through hole communicating with the cylinder portion 28. The gas cartridge 8 is coupled to the piston housing 24 by fitting the coupling portion 26 to the coupling receiving portion 35. In this way, by connecting the gas cartridge 8, the compressed carbon dioxide gas 7 filled in the gas cartridge 8 can be injected from the gas ejection hole 13 to the cylinder portion 28 of the piston housing 24 through the connecting portion 26. It becomes.

  In the cylinder part 28, the 1st piston 17 which receives the pressure of the compressed carbon dioxide gas injected from the gas injection hole 13 is arrange | positioned so that advancing and retreating is possible. In order to prevent the carbon dioxide gas 7 supplied to the cylinder part 28 from leaking outside the purpose, the first piston 17 can move in close contact with the inner peripheral surface of the cylinder part 28, as shown in FIG. As shown in FIG. 2, a rubber piston ring 36 is attached between the upper and lower flange portions 17a and 17b.

  Further, as shown in FIG. 2, a shaft-shaped pressing operator 37 is provided on the lower end side of the first piston 17 so as to project. As shown in FIG. 1, when the first piston 17 is disposed in the cylinder portion 28, the pressing operator 37 enters the connection receiving portion 35 and is fitted into the connection receiving portion 35. The valve body 9 abuts against the pressing operation portion 27 of the valve body 9 protruding into the connecting portion 26, and the valve body 9 is moved and operated against the urging force of the first coil spring 19.

  As described above, the space to which the carbon dioxide gas 7 is supplied in the cylinder portion 28 in which the first piston 17 that can be advanced and retracted by receiving the urging force of the second coil spring 30 is supplied from the gas cartridge 8. It functions as a pressure control chamber 23 that controls the pressure of the carbon dioxide gas 7 as the compressed fluid to be injected to a constant pressure.

  Further, the cylinder portion 28 is provided with a gas outlet hole 38 for leading out the carbon dioxide gas 7 supplied to the pressure control chamber 23 and controlled at a constant pressure.

  Here, a state in which the pressure of the compressed carbon dioxide gas 7 injected from the gas cartridge 8 and supplied to the pressure control chamber 23 is reduced and controlled to a constant pressure will be described.

In the present embodiment, in order to control the pressure of the compressed carbon dioxide gas 7 injected from the gas cartridge 8, the holding cap 32 is rotated in the direction of entering the mechanism mounting portion 4, and the spring pressure adjusting member 31. the movement in Figure 1 the arrow Y ₃ direction. When the spring pressure adjusting member 31 moves in the direction of arrow Y _{3 in} FIG. 1, the second coil spring 30 is pressed in the same direction, and the first piston 17 is pressed via the second coil spring 30. When the first piston 17 is pressed in the direction of the arrow Y _{3 in} FIG. 1, the pressing operator 37 is brought into contact with the pressing operation portion 27 of the valve body 9. At this time, the valve body 9 receives the urging force of the first coil spring 19, because it is moved biased in the arrow Y ₁ direction in FIG. 1, the pressing operation element 37 is pressed portion with a predetermined contact pressure 27 abuts.

Thrusting operators 37 moves contact with further rotating the holding cap 32 from the state the spring pressure adjusting member 31 in FIG. 1 arrow Y ₃ direction the pressing operation unit 27, the second coil spring 30 in the same direction When pressed, the second coil spring 30 is compressed under a load that urges the pressing force and the valve body 9 by spring pressure adjusting member 31 in the direction for closing the Figure 1 arrow Y ₁ direction of gas ejection holes 13 The urging force F ₂ is accumulated. Further, the holding cap 32 is rotated to compress the second coil spring 30 as shown in FIG. 4, and the biasing force F ₂ accumulated in the second coil spring 30 biases the valve body 9. When it becomes larger than the force F ₁ , the first piston 17 presses the pressing operation portion 27 with the pressing operation element 37 and moves the valve body 9 in the direction of arrow Y ₂ in FIG.

As described above, the valve body 9 includes the second piston 18 and is disposed in the gas cartridge 8 so that the pressure of the compressed carbon dioxide gas 7 is evenly received on almost the entire surface on the outer peripheral side. The biasing force f ₁ that biases the valve body 9 in the direction of closing the gas ejection hole 13 can be handled as the biasing force of the first coil spring 19 that biases the valve body 9.

When the urging force F ₂ of the compressed _second coil spring 30 becomes larger than the urging force F ₁ of the first coil spring 19 that urges the valve body 9, the valve body 9 is urged by the first coil spring 19. ₁ moves in the direction of the arrow Y _{2 in} FIG. 1 against F ₁ , the fitting of the sealing portion 16 to the gas ejection hole 13 is released, and the gas ejection hole 13 is opened. When the gas ejection holes 13 are opened, the carbon dioxide gas 7 liquefied and filled in the gas cartridge 8 is supplied to the pressure control chamber 23 configured in the cylinder portion 28 while being vaporized. Then, the carbon dioxide gas 7 supplied to the pressure control chamber 23 passes through the gas outlet hole 38 from the pressure control chamber 23 and fills the storage container 3 in which the propellant 2 is stored. The pressure of the carbon dioxide gas filled in the storage container 3 from the pressure control chamber 23 acts on the end surface 17 a of the first piston 17 that defines the pressure control chamber 23, and the first piston 17 is attached to the second coil spring 30. A pressure is generated so as to move against the force F ₂ in the direction of the arrow Y _{4 in} FIG.

  In the spray device of the present embodiment, the storage container 3 contains a gas cartridge 8 as a compressed fluid storage container filled with the compressed carbon dioxide gas 7 that is a high-pressure gas source. The decompressed carbon dioxide gas is filled, and it is possible to prevent the supply of high-pressure carbon dioxide gas exceeding a certain pressure. Therefore, the storage container 3 can be pressurized to a pressure higher than the pressure controlled by the pressure control mechanism of the present invention. Therefore, the storage container 3 has sufficient strength to withstand the pressure of the compressed carbon dioxide supplied to the storage container 3. Any material may be used as long as it is formed, and it can be formed from a synthetic resin molding or the like. And the shape of the storage container 3 which comprises a spraying apparatus, and the range of selection of the material to be used can be expanded, and it can form with the material suitable for the content to store.

  By the way, the pressure control mechanism 6 according to the present invention for controlling the pressure of the carbon dioxide gas injected from the gas cartridge 8 controls the pressure of the first piston 17 for pressing the valve body 9 supported by the first piston 17. The size of the end face 17a to be received and the second coil spring 30 that presses and biases the first piston 17 are appropriately selected, and the second coil spring 30 is held by the holding cap 32 that controls the amount of compression of the second coil spring 30. By selecting a compression load corresponding to a change in the compression amount, it is possible to set an urging force that presses the valve body 9 in a direction in which the gas ejection hole 13 is opened.

The pressure that moves in the direction of the arrow Y _{1 in} FIG. 1 that compresses the second coil spring 30 and moves the first piston 17 away from the valve body 9 is the pressure in the pressure control chamber 23 at which the first piston 17 advances and retreats. It corresponds to the pressure P ₁ of the carbon dioxide gas 7 supplied to the pressure control chamber 23. Therefore, the pressure of the carbon dioxide gas supplied from the gas cartridge 8 to the pressure control chamber 23 can be controlled by controlling the biasing force that presses and biases the first piston 17.

For example, if the biasing force F ₂ when the second coil spring 30 that biases the first piston 17 is compressed by a predetermined amount is 5 kg, and the area of the end surface 17a of the first piston 17 is 1 cm ² , the pressure The pressure P _{1 of the} carbon dioxide gas filled in the control chamber 23 can be controlled to approximately 5 kg / cm ² .

The biasing force F ₂ of the first piston 17 that presses and biases the valve body 9 in the direction to open the gas ejection hole 13 is the first biasing the valve body 9 in the direction to close the gas ejection hole 13. It is set larger than the biasing force F ₁ of the coil spring 19.

Here, the operation of the pressure control mechanism 6 according to the present invention for controlling and injecting the pressure of the carbon dioxide gas filled in the gas cartridge 8 will be described. In the pressure control mechanism 6, when the holding cap 32 is rotated and the spring pressure adjusting member 31 is moved via the spring pressure adjusting member 31, the second coil spring 30 is compressed, and the second coil spring is compressed. When the urging force F _{2 applied} to 30 becomes larger than the urging force F ₁ of the first coil spring 19, the valve body 9 moves in the direction of the arrow Y _{2 in} FIG. 1, and as shown in FIG. Is released. When the gas ejection hole 13 is opened, the liquefied carbon dioxide gas 7 filled in the gas cartridge 8 is injected into the pressure control chamber 23. At this time, the liquefied carbon dioxide gas is vaporized to be injected into the pressure control chamber 23 as a gas. When the pressure control chamber 23 is filled with the carbon dioxide gas 7 and the pressure acting on the end surface 17 a of the first piston 17 becomes larger than the biasing force F ₂ of the second coil spring 30 that biases the first piston 17. The first piston 17 is pressed so as to compress the second coil spring 30. When the first piston 17 is pressed so as to compress the first coil spring 30, the first piston 17 moves in the direction of the arrow Y ₁ in FIG. When the first piston 17 moves in the direction of the arrow Y _{1 in} FIG. 5 and the pressure of the valve body 9 is released, the valve body 9 receives the biasing force of the first coil spring 19 and closes the gas ejection hole 13. 5 moves in the direction of the arrow Y _{1 in} FIG. 5 and fits into the gas ejection hole 13 to close the gas ejection hole 13 as shown in FIG. That is, as shown in FIG. 5, the sealing portion 16 formed in the tapered shape of the valve body 9 moves so as to fit into the gas ejection hole 13 and closes the gas ejection hole 13. And the supply of the carbon dioxide gas from the gas cartridge 8 stops by sealing the gas ejection hole 13.

  At this time, the holding cap 32 is placed in a state of being rotated to a lowered position where the second coil spring 30 is compressed by a predetermined amount.

Thus, when the pressure in the pressure control chamber 23 to which carbon dioxide gas is supplied from the gas cartridge 8 becomes greater than the biasing force F ₂ of the second coil spring 30 that biases the first piston 17, the valve element 9 The gas ejection hole 13 is closed, and the supply of carbon dioxide from the gas cartridge 8 is stopped. Therefore, the pressure control chamber 23, the supply pressure of carbon dioxide greater than a biasing force F ₁ which presses and biases the first piston 17 is stopped, the first piston 17 to the biasing force F ₁ which presses and biases Carbon dioxide gas having a corresponding pressure is supplied.

  By the way, since the liquefied carbon dioxide gas generated by compressing the carbon dioxide gas filled in the gas cartridge 8 has a pressure of 70 atm or more, the pressure control mechanism 6 according to the present invention is filled in the gas cartridge 8. Control is performed to reduce the carbon dioxide gas to a constant pressure and inject it.

Then, when the carbon dioxide gas 7 supplied to the pressure control chamber 23 is released to the outside and the pressure in the pressure control chamber 23 decreases, the valve body 9 is urged by the second coil spring 30. the piston 17 is moved in FIG. 5 in an arrow Y ₂ direction by receiving the pressing force, to open the gas injection holes 13 as shown in FIG. By opening the gas ejection hole 13 again, carbon dioxide gas is ejected from the gas cartridge 8 into the pressure control chamber 23. When carbon dioxide gas is supplied from the gas cartridge 8 and the pressure in the pressure control chamber 23 becomes larger than the urging force F ₁ that presses and urges the first piston 17, the valve element 9 again closes the gas ejection hole 13, The supply of carbon dioxide from the cartridge 8 is stopped.

  Accordingly, carbon dioxide gas whose pressure is controlled to be reduced is supplied to the pressure control chamber 23.

In this pressure control mechanism 6, the spring load (Kgf) of the second coil spring 30 that biases the first piston 17 is appropriately selected, and the biasing force F ₂ when the second coil spring 30 is compressed by a predetermined amount is obtained. The pressure control chamber 23 is filled by appropriately selecting the area S ₁ of the end surface 17a of the first piston 17 that defines the pressure control chamber 23 on condition that the biasing force F ₁ of the first coil spring 19 becomes larger. The pressure of the carbon dioxide gas 7 can be set as appropriate. For example, the biasing force F ₂ of the second coil spring 30 can be varied by controlling the amount of movement of the spring pressure adjusting member 31 that compresses the second coil spring 30 and adjusting the amount of displacement of the second coil spring 30. Thus, the pressure of the carbon dioxide gas 7 filled in the pressure control chamber 23 can be variably controlled.

  Note that the carbon dioxide gas 7 whose pressure is controlled by the pressure control mechanism 6 of the present embodiment is used as an injection gas for injecting the injection 2 stored in the storage container 3 of the spraying device 1. Therefore, the carbon dioxide gas 7 that is filled in the pressure control chamber 23 and whose pressure is controlled is injected and filled into the storage container 3 through the gas outlet hole 38 provided in the pressure control chamber 23. Therefore, the storage container 3 is filled with the carbon dioxide gas 7 whose pressure is controlled in the pressure control chamber 23.

  As shown in FIGS. 1 and 6, the pressure control mechanism 6 used as a device for supplying the carbon dioxide gas 7 for injecting the spray 2 stored in the storage container 3 of the spray device 1 includes the spray device 1. It arrange | positions so that it may accommodate in the storage container 3. FIG. In the present embodiment, the piston housing 24 to which the gas cartridge 8 is connected is stored in the storage container 3 together with the gas cartridge 8, and the flange portion 40 protruding from the peripheral edge on the upper end side of the piston housing 24 is provided in the storage container 3. It is abutted and positioned on the upper end surface of the mechanism mounting portion 4 provided in the mounting. At this time, the space between the piston housing 24 and the mechanism mounting portion 4 is hermetically sealed so as not to cause gas leakage, and the storage container 3 is sealed.

  By the way, in the spraying device 1 in which the pressure control mechanism 6 according to the present invention is used, the injection 2 is injected by using the compressed and pressurized carbon dioxide gas 7 filled in the storage container 3. An injection control mechanism 5 for controlling is provided.

  The injection control mechanism 5 is arranged in a spring-shaped adjusting member 31 formed in a cylindrical shape so as to be fitted to the upper end side of the housing main body 29, and is integrated with the spring-pressure adjusting member 31. A valve housing 41 that moves in the housing body 29, a stem 42 that moves in the valve housing 41, and a valve member 43 that is attached to the outer periphery of the stem 42 and is formed in a ring shape by an elastic body such as rubber. And a valve presser 44 that holds the valve member 43 between the valve housing 41, a coil spring 45 that biases the stem 42, a connecting pipe 46 that is connected to the stem 42, and an upper end portion of the connecting pipe 46. And an injection button 48 provided with an injection nozzle 47.

  The valve housing 41 is formed in a bottomed cylindrical shape, and a fitting protrusion 49 is provided at the tip, and the fitting protrusion 49 is fitted into a through hole 50 formed in the bottom of the spring pressure adjusting member 31. The spring pressure adjusting member 31 is attached. In the valve housing 41, a small diameter portion 41a and a large diameter portion 41b are formed. A bulging portion 41 c is formed on the upper end side of the valve housing 41.

  A communication pipe 51 is attached to the small diameter portion 41 a of the valve housing 41 through the peripheral wall of the valve housing 41, the peripheral wall of the spring pressure adjusting member 31, and the housing body 29. The communication pipe 51 is for communicating between the valve housing 41 and the storage container 3, and a suction tube 52 is connected to one end portion side that opens into the storage container 3. The projectile 2 filled in the storage container 3 is sucked into the valve housing 41 through the suction tube 52 and the communication pipe 51 together with the carbon dioxide gas 7.

  The large diameter portion 41b has a stepped portion 41d formed between the small diameter portion 41a and one end side locked to accommodate the coil spring 45. The coil spring 45 is engaged with the other end side of the coil spring 45. Thus, the stem 42 is disposed.

  The stem 42 disposed in the valve housing 41 is formed with a conduction path 53 having one end opened. A valve hole 54 that penetrates the conduction path 53 is formed in the peripheral wall of the stem 42. A fitting groove 55 is formed on the outer periphery of the portion of the stem 42 where the valve hole 54 is formed, and the valve member 43 is attached so as to fit into the fitting groove 55. Further, a locking step 42 a is formed on the distal end side of the stem 42.

  The stem 42 has a distal end inserted into the valve housing 41, the locking step 42a is inserted into and locked to the other end of the coil spring 45, and the outer peripheral side of the valve member 43 attached to the middle portion is bulged 41c. It arrange | positions so that it may mount in the recessed part 56 formed in the upper surface side. A cylindrical valve retainer 44 is fitted in the spring pressure adjusting member 31 disposed so that the valve housing 41 is housed together with the stem 42. The valve retainer 44 is fitted in the spring pressure adjusting member 31 so as to be fitted on the outer peripheral side of the stem 42, and the outer peripheral side of the valve member 43 placed in the recess 56 is moved by the spring pressure adjusting member 31. Hold it. In addition, a ring-shaped protrusion 56a is formed in the concave portion 56, and the pressure-bonding force to the valve member 43 is concentrated so as to perform reliable clamping.

The stem 42 is attached to the valve housing 41 so that the stem 42 is prevented from coming off from the valve housing 41 by fixing the valve member 43 attached to the middle portion. The stem 42, when being pressed in arrow in FIG. 4 Y ₃ direction against the biasing force of the coil spring 45, to move the valve member 43 in the same direction while elastically deforming. And the valve member 43 opens and closes the valve hole 54 provided in the stem 42 by elastically deforming.

  A connecting pipe 46 communicating with the conduction path 53 is attached to the other end side of the stem 42 attached to the valve housing 41 so as to be able to advance and retreat. The connecting pipe 46 protrudes to the outside through a through hole 32b provided in the top plate portion 32a of the holding cap 32 attached to the mechanism attaching portion 4, and an injection button 48 provided with an injection nozzle 47 at the upper end thereof. Is attached.

  Next, the operation of injecting the spray 2 stored in the storage container 3 by the spray device 1 to which the pressure control mechanism 6 according to the present invention is applied will be described.

  As shown in FIG. 1, the pressure control mechanism 6 applied to the spray device 1 is placed at a position where the holding cap 32 is raised with respect to the mechanism mounting portion 4 in the initial state.

Here, when the holding cap 32 is rotated and moved into the mechanism mounting portion 4, the upper end portion of the spring pressure adjusting member 31 is pressed by the top plate portion 32 a of the holding cap 32, and the spring pressure adjusting member 31. Is moved in the direction of arrow Y ₃ in FIG. 1 so as to compress the second coil spring 30. At this time, the spring pressure adjusting member 31 within the injection control mechanism is configured to 5 are also moved in Figure 1 an arrow Y ₃ direction integrally with the spring pressure adjusting member 31.

Then, the spring pressure adjusting member 31 is moved in the direction of arrow Y _{3 in} FIG. 1, the second coil spring 30 is compressed, and the biasing force F ₂ of the _second coil spring 30 is biased by the biasing force F of the first coil spring 19. becomes greater than _1, the first piston 17 against the biasing force of the first coil spring 19 is moved in the arrow Y ₃ direction in FIG. 1, the valve body by pressing the operating element 37 provided on the first piston 17 9 is moved in one of arrow Y ₂ direction in the drawing against the urging force of the first coil spring 19, is fitted to the gas ejection holes 13 of the sealing portion 16 provided in the valve body 9 is released, FIG. 5 As shown in FIG. 3, the gas ejection hole 13 is opened. When the gas ejection hole 13 is opened, the carbon dioxide gas 7 is ejected from the gas cartridge 8 into the pressure control chamber 23 formed in the cylinder portion 28. In the pressure control chamber 23, the pressure acting on the end surface 17 a of the first piston 17 and the biasing force F ₂ acting on the first piston 17 biased by the second coil spring 30 antagonize. The carbon dioxide gas 7 is supplied from the gas cartridge 8 until the above. When carbon dioxide gas is supplied to the pressure control chamber 23 and the pressure in the pressure control chamber 23 becomes larger than the urging force F ₂ acting on the first piston 17, the ejection hole 13 is blocked by the valve body 9 as described above. Then, the supply of carbon dioxide from the gas cartridge 8 is stopped.

  Further, in the spray device 1, the carbon dioxide gas 7 injected into the pressure control chamber 23 is supplied to the storage container 3 in which the injection product 2 is stored via the gas outlet hole 38. At this time, the carbon dioxide gas 7 is supplied from the gas cartridge 8 until the storage container 3 is filled. The storage container 3 is filled with the carbon dioxide gas 7 that is decompressed in the pressure control chamber 23 in which the first piston 17 urged by the second coil spring 30 is disposed and controlled to a constant pressure. In the state where the storage container 3 is filled with the carbon dioxide from the pressure control chamber 23, the gas ejection hole 13 is closed by the valve body 9, and the supply of the carbon dioxide from the gas cartridge 8 is stopped.

In the spray device 1 described above, the holding cap 32 enters the position where it can enter the most with respect to the mechanism mounting portion 4 in which the top plate portion 32a is in contact with the flange portion 40 of the piston housing 24, as shown in FIG. Is done. In this state, the second coil spring 30 is compressed most and the urging force F ₂ becomes the largest and acts on the first piston 17, and the urging force F ₂ of the second coil spring 30 acts on the first piston 17. The pressure to move against the maximum is the highest, and the pressure of the carbon dioxide gas 7 that is pressure-reduced in the pressure control chamber 23 is the highest. Therefore, the biasing force F of the second coil spring 30 is adjusted by adjusting the advancement amount of the holding cap 32 relative to the mechanism mounting portion 4, controlling the spring pressure adjusting member 31, and adjusting the compression rate of the second coil spring 30. By adjusting ₂ , it is possible to adjust the pressure of the carbon dioxide gas 7 that is pressure-reduced in the pressure control chamber 23.

Then, when the injection button 48 is pressed while the storage container 3 is filled with the carbon dioxide gas 7 whose pressure has been adjusted in the pressure control chamber 23, the stem 42 attaches the coil spring 45 while elastically displacing the valve member 43. move 4 arrow Y ₃ direction against the force. At this time, the valve hole 43 is released by the elastic displacement of the valve member 43, and the projectile 2 placed in a state pressurized by the carbon dioxide 7 filled in the storage container 3 is put together with the carbon dioxide 7 together with the suction tube. 52 and the conduction path 53, and is supplied into the valve housing 41. The injection 2 and the carbon dioxide gas 7 supplied to the valve housing 41 are supplied into the stem 42 through the valve hole 54, flow through the connecting pipe 46, and are injected from the injection nozzle 47 to the outside.

  When carbon dioxide gas filled in the storage container 3 is injected together with the ejected matter 2 and the inside of the storage container 3 is decompressed, the pressure control chamber 23 is also decompressed and the gas ejection hole 13 is opened. When the gas ejection hole 13 is opened again, the carbon dioxide gas ejected from the gas cartridge 8 from the gas cartridge 8 through the pressure control chamber 23 into the storage container 3 is controlled to a constant pressure and supplied. Is in a state where injection is possible.

  In the spray device of the present embodiment, the storage container 3 in which the projectiles 2 are stored is supplied with carbon dioxide gas that has been depressurized to a certain pressure, and is not supplied with carbon dioxide gas that exceeds a certain pressure. The pressure can be prevented.

  In the above-described embodiment, the example in which the pressure control mechanism 6 is used in the spray device 1 has been described. However, the pressure control mechanism 6 according to the present invention is applied to a device that uses a compressed fluid controlled to a constant pressure. For example, a gas lead-out pipe may be connected to the gas lead-out hole 38 provided in the pressure control chamber 23 to lead out to a device using a compressed fluid.

  Further, in the embodiment described above, the holding cap 32 for moving the spring pressure adjusting member 31 is attached to the mechanism attaching portion 4 provided in the storage container 3, but the fixing member is fixed to the spring pressure adjusting member 31. You may make it attach to the piston housing 24 used.

  Furthermore, the compressed fluid is not limited to carbon dioxide gas, and a compressed gas body such as nitrogen gas can be used.

Claims (11)

1. A compressed fluid pressure control mechanism for controlling the pressure of a compressed fluid ejected from a compressed fluid storage container filled with the compressed fluid,
A first position which is disposed in the compressed fluid storage container filled with the compressed fluid and which closes the compressed fluid ejection hole provided in the compressed fluid storage container; and a second position which releases the ejection hole. A valve body that moves between
A first urging member that urges the valve body in a direction of a first position that closes the ejection hole;
A cylinder connected to the compressed fluid storage container so as to be supplied with the compressed fluid ejected from the ejection hole;
A piston that is movably disposed in the cylinder portion and moves the valve body in relation to a part of the valve body protruding from the ejection hole;
A second urging member that urges the piston in a direction in contact with the valve body;
A pressure control chamber configured between the piston and the ejection hole and supplied with a compressed fluid ejected from the compressed fluid storage container;
By controlling the biasing force of the second biasing member that presses and biases the piston, the pressure of the compressed fluid supplied from the ejection hole to the pressure control chamber is controlled to be reduced. Pressure control mechanism. 2. Urging member displacing means for variably controlling the displacement amount of the second urging member and controlling the pressing urging force of the piston;
2. The compressed fluid according to claim 1, wherein the pressure of the compressed fluid supplied to the pressure control unit is controlled by operating the biasing member displacing means to control the pressing biasing force of the piston. Pressure control mechanism.   3. The valve body is provided with a further piston that is guided by a movement guide portion provided in the compressed fluid storage container and moves integrally with the valve body, and between the further piston and the movement guide portion. A communication chamber is formed, and an air chamber into which the compressed fluid filled in the compressed fluid storage container flows is formed between the ejection hole closed by the valve body and the further piston. The pressure control mechanism of the compressed fluid according to claim 1.   4). The valve body is a sharp body in which a sealing portion formed so as to reduce in diameter from the proximal end side toward the distal end side is formed on the distal end side, and the sealing portion is fitted in the ejection hole. The compressed fluid pressure control mechanism according to claim 1, wherein the ejection holes are closed together.   5. The second urging means includes a compression coil spring, and the urging force control mechanism includes a spring compression operation member that controls the urging force of the compression coil spring by being advanced and retracted with respect to the compression coil spring. The pressure control mechanism for compressed fluid according to claim 1.   6). 2. The pressure control mechanism for compressed fluid according to claim 1, wherein a lead-out hole for leading the compressed fluid supplied to the pressure control chamber to the outside is formed in the pressure control chamber.   7). 2. The compressed fluid pressure control mechanism according to claim 1, wherein the compressed fluid is compressed carbon dioxide. 8). A storage container that stores an injection material that is injected by the action of pressure of the compressed fluid, and that includes an injection control mechanism that controls injection of the injection material stored in the storage container;
A spray apparatus in which a compressed fluid pressure control mechanism for controlling the pressure of the compressed fluid ejected from the compressed fluid container filled with the compressed fluid is disposed in the storage container,
The pressure control mechanism disposed in the storage container is:
A first position which is disposed in the compressed fluid storage container filled with the compressed fluid and which closes the compressed fluid ejection hole provided in the compressed fluid storage container; and a second position which releases the ejection hole. A valve body that moves between
A first urging member that urges the valve body in a direction of a first position that closes the ejection hole;
A cylinder connected to the compressed fluid storage container so as to be supplied with the compressed fluid ejected from the ejection hole;
A piston that is movably disposed in the cylinder portion and moves the valve body in relation to a part of the valve body protruding from the ejection hole;
A second urging member that urges the piston in a direction in contact with the valve body;
A pressure control chamber configured between the piston and the ejection hole and supplied with a compressed fluid ejected from the compressed fluid storage container;
A lead-out hole for leading the compressed fluid supplied to the pressure control chamber into the storage container,
By controlling the urging force of the second urging member that presses and urges the piston, the compressed fluid supplied from the ejection hole to the pressure control chamber and supplied to the storage container through the outlet hole is supplied. A spraying device characterized in that the pressure is reduced. 9. The pressure control mechanism includes an urging member displacing unit that variably controls a displacement amount of the second urging member to control a pressing urging force of the piston.
9. The spraying device according to claim 8, wherein the pressure of the compressed fluid supplied to the pressure control unit is controlled by operating the biasing member displacing means to control the pressing biasing force of the piston.   10. The spray device according to claim 8, wherein the storage container is a molded body of synthetic resin.   11. The spray apparatus according to claim 8, wherein the compressed fluid is compressed liquefied carbon dioxide.

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