JP2010210066A - Valve mechanism and valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a miniaturizable valve mechanism stopping the flow of fluid by causing a valve element to move toward the valve chamber sides of an inflow portion and an outflow portion for the fluid. <P>SOLUTION: The valve mechanism 4 includes: a body unit 11 having a valve chamber 10; an inflow portion 12 and an outflow portion 13 formed therein; and a valve element 14 for opening and closing the inflow portion 12. The inflow portion 12 is formed with a small diameter portion 12a and a large diameter portion 12b, the small diameter portion 12a being positioned closer to the valve chamber 10 side than the large diameter portion 12b. The valve element 14 includes a shank 14f positioned at the valve chamber 10 and the inflow portion 12, and a valve portion 14c formed integrally with the shank 14f and positioned at the large diameter portion 12b. The diameter of the shank 14c is formed to be larger than that of the small diameter portion 12a and smaller than that of the large diameter portion 12b. The valve portion 14c opens and closes a boundary 12d between the small diameter portion 12a and the large diameter portion 12b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a valve mechanism for controlling the flow of fluid and a valve device including the valve mechanism.

  Conventionally, as a valve mechanism for controlling the flow of fluid, a movable shaft that reciprocally moves in the axial direction to open and close an outlet from which fluid flows out from the valve chamber, a coil and a permanent magnet for driving the movable shaft, There is known a valve mechanism provided with (for example, see Patent Document 1). In the valve mechanism described in Patent Document 1, a coil wound in a cylindrical shape and a permanent magnet formed in a cylindrical shape are arranged so as to overlap in the axial direction of the movable shaft. The movable shaft is made of a magnetic material and is arranged on the inner peripheral side of the coil and the permanent magnet. In this valve mechanism, by switching the energization direction to the coil, the magnetic pole formed at the end of the movable shaft is switched, and the movable shaft moves in the axial direction to open and close the outlet. Specifically, when the movable shaft moves from the valve chamber side toward the outlet, the outlet is closed.

  Further, as a valve mechanism for controlling the flow of fluid, there is known a valve mechanism that performs opening and closing of an inlet through which fluid flows into a valve chamber by a piston that reciprocally moves in an axial direction (for example, Patent Document 2). reference). In the valve mechanism described in Patent Document 2, the piston moves in the axial direction by compressed air to open and close the inlet. Specifically, when the piston moves from the valve chamber side toward the inlet, the inlet is closed.

JP 2007-16935 A Japanese Patent Laid-Open No. 5-245866

  In the valve mechanism described in Patent Document 1, when the movable shaft moves from the valve chamber side toward the outflow port, the outflow port is closed and the flow of fluid stops. Further, in the valve mechanism described in Patent Document 2, when the piston moves from the valve chamber side toward the inflow port, the inflow port is closed and the flow of fluid stops. As described above, in the valve mechanism described in Patent Document 1 or Patent Document 2, when a valve body such as a movable shaft or a piston moves from the valve chamber side toward the outlet or the inlet, the flow of fluid stops, Patent Documents 1 and 2 do not disclose a valve mechanism that can stop the flow of fluid by moving the valve body toward the valve chamber with respect to the outlet or the inlet.

  Accordingly, an object of the present invention is a valve mechanism that can stop the flow of fluid by moving the valve body toward the valve chamber side with respect to the inflow portion and outflow portion of the fluid, and can be downsized. It is to provide a possible valve mechanism. Moreover, the subject of this invention is providing the valve apparatus provided with this valve mechanism.

  In order to solve the above problems, the valve mechanism of the present invention has a valve chamber formed therein and an inflow portion through which the fluid flowing into the valve chamber passes and an outflow portion through which the fluid flowing out from the valve chamber passes. A main body portion and a valve body for opening and closing the inflow portion or the outflow portion. The inflow portion or the outflow portion is formed with a small diameter portion and a large diameter portion larger in diameter than the small diameter portion. Is disposed closer to the valve chamber than the large diameter portion, and the valve body includes a valve chamber, a small diameter portion, and a shaft-shaped member disposed in the large-diameter portion, and a portion of the shaft-shaped member is disposed in the small-diameter portion. And a valve portion formed integrally with the shaft portion and having a diameter larger than that of the shaft portion and having a diameter larger than that of the small diameter portion. The valve portion is formed smaller than the diameter of the diameter portion, and the valve portion opens and closes a boundary portion between the small diameter portion and the large diameter portion.

  In the valve mechanism of the present invention, a small diameter portion and a large diameter portion are formed in the inflow portion or the outflow portion, and the small diameter portion is disposed closer to the valve chamber than the large diameter portion. Moreover, the shaft-shaped member is arrange | positioned at the valve chamber, the small diameter part, and the large diameter part. Furthermore, the diameter of the valve part formed in the shaft-like member and disposed in the large diameter part is larger than the diameter of the small diameter part and smaller than the diameter of the large diameter part. Open and close the boundary with the unit. Therefore, in the present invention, the valve body moves toward the valve chamber side with respect to the inflow portion and the outflow portion, thereby closing the inflow portion or the outflow portion and stopping the fluid flow.

  Moreover, in this invention, the valve part arrange | positioned at a large diameter part is integrally formed with the axial part arrange | positioned at a small diameter part. Therefore, the configuration of the valve body can be simplified as compared with the case where the valve portion and the shaft portion are formed separately. Therefore, the configuration of the valve mechanism can be simplified and the valve mechanism can be downsized.

  In the present invention, the boundary portion is formed in an inclined surface shape that is inclined so as to spread outward in the radial direction toward the large diameter portion, and the valve portion has a slope shape that abuts the boundary portion and closes the boundary portion. It is preferable that a boundary contact portion is formed. If comprised in this way, it will become possible to make a boundary part and a valve part contact reliably. Therefore, even in the valve mechanism in which the valve body moves toward the valve chamber side with respect to the inflow portion or the outflow portion and closes the inflow portion or the outflow portion, the inflow portion or the outflow portion is reliably secured by the valve portion. It becomes possible to close.

  In the present invention, it is preferable that the inclination angle of the boundary portion with respect to the axial direction of the shaft-shaped member is larger than the inclination angle of the boundary contact portion with respect to the axial direction of the shaft-shaped member. If comprised in this way, while it becomes easy to contact a boundary contact part by a boundary part, it becomes possible to isolate | separate a boundary contact part from a boundary part easily.

  In the present invention, it is preferable that the small diameter portion and the large diameter portion are formed in the inflow portion, and the valve portion opens and closes the inflow portion. If comprised in this way, when the valve body has closed the inflow part, even if the pressure of the fluid inflow side becomes large, it will become possible to stop the inflow of the fluid to a valve chamber reliably. Therefore, it is possible to reliably prevent fluid leakage from the valve mechanism when the valve body closes the inflow portion.

  In the present invention, the main body portion includes a first main body portion and a second main body portion that can be divided, and the valve body is a shaft-like member so that the shaft-like member can be moved relative to the main body portion in the axial direction. It is preferable that the membrane member has a sealing function to prevent fluid leakage from the valve chamber at the joint of the first body portion and the second body portion. If comprised in this way, it becomes unnecessary to arrange | position a sealing member separately in the joint of the 1st main-body part and the 2nd main-body part. Therefore, the configuration of the valve mechanism can be simplified.

  In the present invention, the valve body is preferably formed of an elastic material. If comprised in this way, it will become possible to contact | adhere the boundary part and valve part which are formed in an inflow part or an outflow part, and it becomes possible to suppress the leak of a fluid effectively.

  In the present invention, the valve body includes a film-like member that holds the shaft-like member so that the shaft-like member can be moved relative to the main body portion in the axial direction, and the central portion of the shaft-like member is a shaft-like member. Preferably, the film-like member is made of a soft material having a transverse modulus of elasticity smaller than that of the central portion of the shaft-like member. If comprised in this way, the smooth movement to the axial direction of a shaft-shaped member will be attained. That is, when the central part of the shaft-shaped member is formed of a hard material, the shaft-shaped member is not easily deformed even if a force for moving in the axial direction acts on the shaft-shaped member, and the film-shaped member is soft. When formed of a material, the membrane member is easily deformed when a force for moving in the axial direction is applied to the axial member, so that the axial movement of the axial member becomes possible. .

  In the present invention, the surface portion of the shaft-like member and the film-like member are preferably formed of the same soft material having a smaller longitudinal elastic modulus and transverse elastic modulus than the central portion of the shaft-like member. If comprised in this way, it will become possible to simplify the structure of a valve body compared with the case where the surface part of a shaft-shaped member and a film-shaped member are formed with a different soft material.

  In the present invention, it is preferable that the valve mechanism includes an inflow hole connected to the inflow portion and an outflow hole connected to the outflow portion and a rubber seal member formed of an elastic material. If comprised in this way, it will become possible to prevent the leak of the fluid which flows in into a main-body part, and the leak of the fluid which flows out out of a main-body part by simple structure using one sealing member.

  In the present invention, it is preferable that one of the inflow hole or the outflow hole is arranged so as to be connected to the large diameter portion, and one diameter of the inflow hole or the outflow hole connected to the large diameter portion is smaller than the diameter of the valve portion. If comprised in this way, it will become possible to make a valve part contact | abut to a sealing member, and to regulate the movable range of a valve body. Therefore, it is not necessary to separately provide a regulating member for regulating the movable range of the valve body, and the configuration of the valve mechanism can be simplified.

  The valve mechanism of the present invention can be used in a valve device including a valve drive mechanism that opens and closes a valve body with respect to an inflow portion or an outflow portion. In this valve device, the valve body moves toward the valve chamber side with respect to the inflow portion and the outflow portion, thereby closing the inflow portion or the outflow portion and stopping the fluid flow. Further, in this valve device, the valve mechanism can be reduced in size, so that the device can be reduced in size.

  In the present invention, the valve device preferably includes an urging mechanism for maintaining the state in which the valve portion closes the boundary portion. In this case, the urging mechanism is, for example, a spring member. In the present invention, the urging mechanism may be a spring member, but the urging mechanism is preferably a magnetic attraction mechanism. When the urging mechanism is a magnetic attraction mechanism, the magnetic attraction mechanism holds the magnetic member attached to one end of the shaft-like member and attracts the magnetic member in the direction in which the valve portion closes the boundary portion. It is preferable to provide a working magnet. If comprised in this way, it will become possible to close an inflow part or an outflow part reliably by a valve part, and it will become possible to prevent the leakage of the fluid from a valve chamber. Also, as the valve body moves in the direction in which the valve portion opens the boundary, the magnetic attractive force between the magnetic member and the holding magnet decreases, so the valve drive that opens and closes the valve body The power of the mechanism can be reduced. Therefore, the configuration of the valve drive mechanism can be simplified.

  In the present invention, for example, the main body section includes a first main body section and a second main body section that can be divided, and the valve body holds the shaft-shaped member so that the shaft-shaped member can be moved relative to the main body section. A membrane member that performs a sealing function to prevent fluid leakage from the valve chamber at the joint of the first body portion and the second body portion. By opening the body, the valve part is separated from the boundary part, and by closing the valve body by the valve driving mechanism, the valve part abuts on the boundary part, and by opening / closing the valve body by the valve driving mechanism, the membrane member In the valve mechanism, when the valve part is separated from the boundary part, the fluid flows into the valve chamber from the inflow part, the fluid flows out from the outflow part, and when the valve part comes into contact with the boundary part, the inflow occurs. Flow of fluid into the valve chamber As well as stop the outflow of fluid from the outlet portion is stopped.

  As described above, in the valve mechanism and the valve device of the present invention, the flow of the fluid can be stopped by moving the valve body toward the valve chamber side with respect to the fluid inflow portion and the outflow portion. It becomes possible to reduce the size.

It is a perspective view of the valve device concerning an embodiment of the invention. It is a disassembled perspective view of the valve apparatus of FIG. It is a perspective view of the valve mechanism shown in FIG. It is sectional drawing of the valve mechanism shown in FIG. FIG. 4 is an exploded perspective view of the valve mechanism shown in FIG. 3. It is sectional drawing for demonstrating the specific structure of the piston holding | maintenance part shown in FIG. It is a figure for demonstrating the attachment process of the valve body to the 1st main-body part shown in FIG. 3, (A) is a figure which shows the state before a valve part passes a small diameter part, (B) is a valve part. It is a figure which shows the state after passing a small diameter part. It is a top view which shows the state which removed the cover member from the valve apparatus shown in FIG. It is sectional drawing of the EE cross section of FIG. FIG. 3 is a perspective view of a speed reduction plate and a connecting member shown in FIG. 2. It is a top view which shows a state when the valve body has open | released the inflow part of the valve apparatus shown in FIG. It is sectional drawing for demonstrating the structure of the valve body concerning other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Schematic configuration of the valve device)
FIG. 1 is a perspective view of a valve device 1 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the valve device 1 of FIG.

  As shown in FIG. 1, the valve device 1 of the present embodiment is formed in a flat and substantially rectangular parallelepiped shape. The valve device 1 is very small and thin. For example, the vertical width and the horizontal width are about 15 mm, and the thickness is about 1.5 mm. As shown in FIGS. 1 and 2, the valve device 1 includes a valve mechanism 4 having a fluid inlet 2 and an outlet 3, and a valve for performing an opening / closing operation of a later-described valve body 14 constituting the valve mechanism 4. And a drive mechanism 5. In addition, the valve device 1 includes a base member 6 formed in a flat plate shape and a cover member 7 that covers the valve driving mechanism 5 disposed on the base member 6.

  In the following description, as shown in FIG. 1, the three directions orthogonal to each other are defined as an X direction, a Y direction, and a Z direction. In FIG. 1, the X1 direction side is the “right” side, the X2 direction side is the “left” side, the Y1 direction side is the “front” side, the Y2 direction side is the “rear (rear)” side, and the Z1 direction side is “up”. The “side” and the Z2 direction side are the “lower” side.

(Configuration of valve mechanism)
FIG. 3 is a perspective view of the valve mechanism 4 shown in FIG. 4 is a cross-sectional view of the valve mechanism 4 shown in FIG. FIG. 5 is an exploded perspective view of the valve mechanism 4 shown in FIG. FIG. 6 is a cross-sectional view for explaining a specific configuration of the piston holding portion 14h shown in FIG. FIG. 7 is a view for explaining a process of attaching the valve body 14 to the first main body portion 19 shown in FIG. 3, and (A) is a view showing a state before the valve portion 14c passes through the small diameter portion 12a. (B) is a figure which shows the state after the valve part 14c passes the small diameter part 12a.

  As shown in FIGS. 4 and 5, the valve mechanism 4 includes a main body 11 in which a valve chamber 10 is formed. The main body portion 11 is formed with an inflow portion 12 through which the fluid flowing into the valve chamber 10 passes and an outflow portion 13 through which the fluid flowing out from the valve chamber 10 passes. Further, the valve mechanism 4 includes a valve body 14 that opens and closes the inflow portion 12, and a seal member 17 in which an inflow hole 17 a connected to the inflow portion 12 and an outflow hole 17 b connected to the outflow portion 13 are formed.

  The main body 11 is formed in a substantially rectangular parallelepiped shape that is flat in the vertical direction. The main body 11 includes a first main body 19 made of resin and a second main body 20 that can be divided in the front-rear direction. In this embodiment, the first main body portion 19 is disposed on the rear side, the second main body portion 20 is disposed on the front side, and the first main body portion 19 and the second main body portion 20 are fixed to each other.

  The 1st main-body part 19 is formed in the substantially rectangular parallelepiped shape flat in the up-down direction. A valve chamber 10, an inflow portion 12, and an outflow portion 13 are formed inside the first main body portion 19. Further, the first main body portion 19 is formed with a first placement recess portion 19a in which a later-described diaphragm portion 14b constituting the valve body 14 is placed, and a second placement recess portion 19b in which the seal member 17 is placed. . The first placement recess 19a is formed to be recessed from the front end surface of the first main body 19 toward the rear side, and the second placement recess 19b is formed to be recessed from the rear end surface of the first main body 19 toward the front side. ing.

  The valve chamber 10 is formed on the front end side of the first main body 19 so as to be connected to the first arrangement recess 19a. As shown in FIG. 5, a step surface 19c parallel to the ZX plane formed from the Z direction and the X direction is formed at the boundary between the valve chamber 10 and the first arrangement recess 19a. The inflow portion 12 is formed so as to be connected to the rear surface on the right end side of the valve chamber 10, and is formed so as to be connected to the second arrangement recess 19b. The outflow portion 13 is formed so as to be connected to the rear surface on the left end side of the valve chamber 10 and is formed so as to be connected to the second arrangement recess 19b.

  The inflow portion 12 is formed with a round hole-shaped small-diameter portion 12a having a substantially circular shape when viewed from the front-rear direction, and a round-hole-shaped large-diameter portion 12b having a larger diameter than the small-diameter portion 12a. Yes. As shown in FIG. 4, the small-diameter portion 12a is formed on the front end side of the inflow portion 12, and the front end of the small-diameter portion 12a has a truncated cone shape that is inclined so as to spread outward in the radial direction toward the front side. It is connected to the valve chamber 10 through the inclined surface portion 12c.

  The large diameter portion 12b is formed on the rear end side of the inflow portion 12, and the rear end of the large diameter portion 12b is connected to the second arrangement recess 19b. Further, at the boundary between the small diameter portion 12a and the large diameter portion 12b, a truncated cone-shaped inclined surface portion 12d that is inclined so as to spread outward in the radial direction toward the rear side is formed. That is, the inclined surface portion 12d of this embodiment is a boundary portion between the small diameter portion 12a and the large diameter portion 12b, and is formed in an inclined surface shape that is inclined so as to spread outward in the radial direction toward the large diameter portion 12b. Has been. In this embodiment, the surface of the inclined surface portion 12d is smooth. In addition, the outflow part 13 is formed in the round hole shape with a fixed diameter which becomes a substantially circular shape when it sees from the front-back direction.

  As shown in FIG. 5, the step surface 19c is formed with a convex portion 19d that slightly protrudes toward the front side. Specifically, a substantially arc-shaped convex portion 19d is formed on the right end side of the step surface 19c. The convex portion 19d is formed so that its cross-sectional shape is substantially triangular.

  The second main body portion 20 is formed in a substantially flat plate shape. The second body portion 20 is formed with a piston arrangement hole 20a in which a piston portion 14a, which will be described later, constituting the valve body 14 is arranged so as to penetrate in the front-rear direction. In this embodiment, a piston arrangement hole 20 a is formed in front of the inflow portion 12.

  Further, as shown in FIG. 4, a convex portion 20 b that slightly protrudes toward the rear side is formed on the rear surface of the second main body portion 20. This convex part 20b is formed so that it may contact | abut to the front surface of the below-mentioned diaphragm part 14b which comprises the valve body 14. FIG. Specifically, as will be described later, the outer peripheral side portion (the portion indicated by the two-dot chain line in FIG. 5) of the front surface of the diaphragm portion 14b formed so that the shape when viewed from the front-rear direction is substantially a front-rear circular cone shape. ). In other words, the convex portion 20b is formed so that the shape when viewed from the front-rear direction is a substantially forward and rear circular cone shape slightly smaller than the outer shape of the diaphragm portion 14b. Moreover, the convex part 20b is formed so that the cross-sectional shape may become a substantially triangular shape.

  The valve body 14 is made of an elastic material. Specifically, the valve part 14 of this embodiment is formed of rubber. The valve body 14 is formed in a substantially columnar shape, and is capable of relative movement in the front-rear direction of the piston part 14a as a shaft-like member arranged with the front-rear direction as an axial direction, and the main body part 11. The diaphragm part 14b as a film-like member holding the piston part 14a is provided. About half of the rear end side of the piston portion 14a is disposed in the valve chamber 10, the inflow portion 12 (that is, the small diameter portion 12a, the large diameter portion 12b and the inclined surface portions 12c and 12d) and the piston arrangement hole 20a. About half of the front end side of 14a protrudes from the main body 11 toward the front side. The diaphragm part 14b is arrange | positioned in the 1st arrangement | positioning recessed part 19a. In addition, the valve part 14 may be formed with the resin material which has rubber property.

  The diaphragm portion 14b is formed in a film shape, and is formed in a substantially bowl shape extending in a direction orthogonal to the front-rear direction from an intermediate position of the piston portion 14a in the front-rear direction. The diaphragm portion 14b may be formed integrally with the piston portion 14a, or may be formed separately from the piston portion 14a and fixed to the piston portion 14a.

  As shown in FIG. 5, the diaphragm portion 14 b is formed such that the shape when viewed from the front-rear direction is substantially a front-rear-circular shape. A piston holding portion 14h that holds the piston portion 14a is formed at the center of the circular portion disposed on the right end side of the diaphragm portion 14b. As shown in FIGS. 5 and 6, a circular circular recess 14j that is recessed toward the rear side is formed on the front surface of the piston holding portion 14h. A circular circular recess 14k that is recessed toward the front side is also formed on the rear surface of the piston holding portion 14h (see FIG. 6). As shown in FIG. 6, the diameter of the circular recessed part 14k is larger than the diameter of the circular recessed part 14j, and the cross section of the piston holding part 14h in the direction orthogonal to the vertical direction has a substantially wave shape.

  The circular recess 14j and the circular recess 14k are formed to make the movement of the piston portion 14a smooth. That is, when the circular recessed portions 14j and 14k are formed, the circular recessed portions 14j and 14k of the piston holding portion 14h are formed as compared with the case where the piston holding portion 14h is formed in a flat plate shape. Since the thickness of the portion can be reduced, the piston holding portion 14h can be easily deformed, and as a result, the movement of the piston portion 14a can be made smooth. Moreover, since it becomes easy to deform | transform the piston holding | maintenance part 14h, the force required in order to move the piston part 14a can be reduced compared with the case where the piston holding | maintenance part 14h is formed in flat form. In particular, in this embodiment, the diameter of the circular concave portion 14k is larger than the diameter of the circular concave portion 14j, and the cross section of the piston holding portion 14h in the direction perpendicular to the vertical direction has a substantially wave shape. It becomes easier to deform the portion 14h, and as a result, the movement of the piston portion 14a can be made smoother, and the force required to move the piston portion 14a can be further reduced.

  The diaphragm part 14b is arrange | positioned in the 1st arrangement | positioning recessed part 19a so that the whole area of the front end side of the valve chamber 10 may be covered. Specifically, the diaphragm portion 14b is arranged in the first arrangement recess 19a in a state where the outer peripheral side portion of the diaphragm portion 14b is sandwiched between the rear surface of the second main body portion 20 and the step surface 19c. . In this embodiment, the piston portion 14a moves in the front-rear direction by utilizing the elastic deformation of the diaphragm portion 14b. Further, the diaphragm portion 14 b of this embodiment fulfills a sealing function for preventing fluid leakage from the valve chamber 10 at the joint of the first main body portion 19 and the second main body portion 20.

  In this embodiment, the convex portion 19d formed on the first main body portion 19 is disposed in the circular concave portion 14k as shown in FIG. Specifically, the convex portion 19d is disposed in the circular concave portion 14k with the bottom surface of the circular concave portion 14k being in contact with the bottom surface of the circular concave portion 14k so as to be slightly recessed toward the front side. Moreover, as shown in FIG. 4, the convex part 20b formed in the 2nd main-body part 20 has the outer peripheral side part (part shown with the dashed-two dotted line of FIG. 5) of the front surface of the diaphragm part 14b slightly toward the back side. In contact with the outer peripheral side portion of the front surface of the diaphragm portion 14b. As described above, in this embodiment, the projecting portions 19d and 20b effectively enhance the sealing function for preventing fluid leakage from the valve chamber 10 at the joint of the first main body portion 19 and the second main body portion 20. ing.

  In addition, the convex part 19d arrange | positioned in the circular recessed part 14k has fulfill | performed the function which prevents that the diaphragm part 14b deform | transforms excessively when the piston part 14a is pushed back as mentioned later. Further, the convex portion 19 d disposed in the circular concave portion 14 k also functions to position the diaphragm portion 14 b and the first main body portion 19.

  A valve portion 14c is formed at the rear end of the piston portion 14a so as to contact the inclined surface portion 12d from the rear side and block the inflow portion 12. A connecting portion 14d connected to the valve drive mechanism 5 is formed at the front end of the piston portion 14a. The diameter of the valve part 14c and the connection part 14d is larger than the diameter of parts other than the valve part 14c and the connection part 14d of the piston part 14a.

  A portion of the piston portion 14a between the diaphragm portion 14b and the valve portion 14c is a shaft portion 14f disposed in the valve chamber 10, the small diameter portion 12a, or the like. The diameter of the rear end side of the shaft portion 14f is smaller than the diameter of the small diameter portion 12a. Further, the diameter of the shaft portion 14f is gradually reduced toward the rear side. That is, the shaft portion 14f is formed in a tapered shape that becomes thinner toward the rear side. Note that the diameter of the shaft portion 14f may be constant in the front-rear direction. That is, the shaft portion 14f may be formed in a columnar shape instead of a tapered shape.

  The diameter of the valve portion 14c is larger than the diameter of the small diameter portion 12a of the inflow portion 12 and smaller than the diameter of the large diameter portion 12b, and the front end side of the valve portion 14c can contact the inclined surface portion 12d. It has become. The front end side of the valve portion 14c is formed in a truncated cone shape that is inclined so as to spread outward in the radial direction toward the rear side. In this embodiment, the front end side of the valve portion 14c is a sloped boundary contact portion 14e that contacts the inclined surface portion 12d and closes the inclined surface portion 12d. The valve part 14c is arrange | positioned in the inner peripheral side of the large diameter part 12b and the inclined surface part 12d in the state which the valve body 14 has closed the inflow part 12. FIG.

  In this embodiment, the contact area between the inclined surface portion 12d and the boundary contact portion 14e when the inclined surface portion 12d and the boundary contact portion 14e contact each other is limited, and the inclined surface portion 12d and the boundary contact portion 14e are In order to reduce the adhesive force, the inclination angle of the inclined surface part 12d with respect to the front-rear direction is larger than the inclination angle of the boundary contact part 14e with respect to the front-rear direction. Further, in order to reduce the adhesive force between the inclined surface portion 12d and the boundary contact portion 14e, the first case body 19 may be formed of a resin having excellent lubricity such as PTFE (polytetrafluoroethylene), Fluorine coating may be applied to the surface of the first case body 19 (more specifically, at least the surface of the inclined surface portion 12d).

  Further, in this embodiment, the surface of the inclined surface portion 12d is smooth, but a convex portion having a substantially triangular cross section is formed on the surface of the inclined surface portion 12d, for example, concentrically or radially. Also good. However, a convex portion needs to be formed on the surface of the inclined surface portion 12d so that the boundary contact portion 14e does not bite into the inclined surface portion 12d and the boundary contact portion 14e does not pass through the inclined surface portion 12d. There is. As will be described later, when the piston portion 14a is pushed rearward and the valve portion 14c is separated from the inclined surface portion 12d, pressure loss does not occur (or pressure loss does not occur so much). And it is necessary to form a convex part on the surface of the inclined surface part 12d so that the flow path between the boundary contact part 14e and the inclined surface part 12d is ensured.

  The seal member 17 is made of an elastic material. Specifically, the seal member 17 of this embodiment is formed of rubber. The seal member 17 is arranged in the second arrangement recess 19b. Specifically, the seal member 17 is arranged in the second arrangement recess 19b so that the inflow hole 17a is connected to the inflow part 12 and the outflow hole 17b is connected to the outflow part 13. In this embodiment, the rear end of the inflow hole 17 a is the inflow port 2, and the rear end of the outflow hole 17 b is the outflow port 3. The seal member 17 may be formed of a resin material having rubber properties.

  As described above, the inflow hole 17 a is connected to the inflow portion 12. Specifically, the inflow hole 17a is connected to the large diameter portion 12b. In this embodiment, the diameter of the inflow hole 17a is smaller than the diameter of the valve portion 14c. Therefore, when the valve body 14 moves to the rear side, the rear end of the valve portion 14 c eventually comes into contact with the seal member 17.

  In the valve mechanism 4 configured as described above, when the piston portion 14a is pulled forward, the valve portion 14c comes into contact with the inclined surface portion 12d of the inflow portion 12 and the inflow portion 12 is closed. When the piston portion 14a is pushed rearward, the valve portion 14c is separated from the inclined surface portion 12d, and the inflow portion 12 is opened. That is, in the valve mechanism 4, the valve part 14c opens and closes the inclined surface part 12d.

  In this embodiment, as shown in FIG. 4, since a predetermined gap is formed between the piston arrangement hole 20a and the piston portion 14a, when the piston portion 14a is pulled forward, the piston portion 14a smoothly moves to the front side, and the valve portion 14c reliably contacts the inclined surface portion 12d. That is, if there is no gap between the piston arrangement hole 20a and the piston portion 14a, when the piston portion 14a is pulled to the front side, the piston holding portion 14h contacts the second main body portion 20 on the rear surface. The piston portion 14a does not move smoothly to the front side, and it is difficult to reliably contact the valve portion 14c with the inclined surface portion 12d. However, in this embodiment, the piston portion 14a smoothly moves to the front side and the valve portion 14c reliably contacts the inclined surface portion 12d. Thus, the gap between the piston arrangement hole 20a and the piston portion 14a functions as a relief space for smoothly moving the piston portion 14a to the front side so that the valve portion 14c abuts against the inclined surface portion 12d. is doing.

  Moreover, in the bubble mechanism 4 comprised as mentioned above, the valve body 14 is attached to the 1st main-body part 19 as follows, for example. First, as shown in FIG. 7, a mounting protrusion 14 m that protrudes rearward from the valve portion 14 c is integrally formed on the valve body 14 before being attached to the first main body portion 19. As shown in FIG. 7 (A), when the mounting projection 14m is inserted into the inflow portion 12 from the front side and pulled from the rear side of the inflow portion 12 toward the rear side, as shown in FIG. The valve part 14c having a diameter larger than that of the part 12a passes through the small diameter part 12a while being elastically deformed, and is disposed on the large diameter part 12b. Moreover, the diaphragm part 14b is arrange | positioned in the 1st arrangement | positioning recessed part 19a.

  Thereafter, the mounting projection 14m is pulled rearward so that the cut surface 14n serving as the rear end surface of the valve portion 14c protrudes rearward from the rear end surface of the first main body portion 19, and then attached at the cut surface 14n. Cut the projection 14m. When the mounting projection 14m is cut, the mounting of the valve body 14 to the first main body 19 is completed. Even if some irregularities are formed on the cut surface 14n, there is no particular problem because the cut surface 14n does not contact the inclined surface portion 12d. On the other hand, since the boundary contact portion 14e contacts the inclined surface portion 12d, when the valve body 14 is manufactured using a mold, the boundary contact portion 14e is formed with high accuracy when the valve body 14 is manufactured. There is a need. Further, when the first case body 19 is manufactured using a mold, it is necessary to accurately form the inclined surface portion 12d so that the mold parting lines and burrs are not generated on the inclined surface portion 12d.

(Configuration of valve drive mechanism)
FIG. 8 is a plan view showing a state where the cover member 7 is removed from the valve device 1 shown in FIG. FIG. 9 is a cross-sectional view taken along the line EE of FIG. FIG. 10 is a perspective view of the speed reduction plate 29 and the connecting member 41 shown in FIG. In the following description, the clockwise direction in FIG. 8 is “clockwise”, and the counterclockwise direction in FIG. 8 is “counterclockwise”. Further, FIG. 8 illustrates a state of the valve device 1 when the valve body 14 closes the inflow portion 12.

  The valve drive mechanism 5 is for opening and closing the valve body 14 with respect to the inflow portion 12, and as shown in FIG. 2, a resin substrate 25 on which a drive coil 26 is formed, and a base A driving magnet 27 fixed to the upper surface of the member 6 and a bearing portion 28 that supports the substrate 25 so as to be rotatable about the vertical direction as an axial direction are provided. The valve drive mechanism 5 is configured such that the substrate 25 performs a swinging motion around the bearing portion 28 with respect to the drive magnet 27.

  Further, the valve drive mechanism 5 includes a speed reducing plate 29 for decelerating and transmitting the swing of the substrate 25 to the valve body 14, a connecting mechanism 30 for connecting the speed reducing plate 29 and the valve body 14, and a driving mechanism. Two terminals 31 to which both end portions of the coil 26 are connected and a terminal block 32 for holding the terminals 31 are provided. In this embodiment, the speed reducing plate 29 is rotatable about a fulcrum shaft 33 fixed to the base member 6.

  The board | substrate 25 is formed in flat form, as shown in FIG. Moreover, the board | substrate 25 is formed in the substantially fan shape which has the notch part 25a in a part of circumferential direction. Specifically, the substrate 25 is formed in a substantially fan shape having a central angle θ (see FIG. 8) of 180 ° or more. The central angle θ of the substrate 25 of this embodiment is approximately 270 °.

  A circular through hole 25 b into which a rolling bearing 35 (described later) constituting the bearing portion 28 is inserted is formed at the center of the substrate 25. On the outer peripheral side of the substrate 25, an engagement groove 25c that is engaged with an engagement protrusion 29b described later formed on the speed reduction plate 29 is formed. The engaging groove 25c is formed so as to be recessed from the radially outer end of the substrate 25 toward the radially inner side. Two substantially semicircular recesses 25d that are recessed inward in the radial direction are formed in the radially inner portion of the notch 25a so as to be adjacent in the circumferential direction.

  Two driving coils 26 are formed on the lower surface of the substrate 25. In this embodiment, as shown in FIG. 2, a conductor pattern wound in a substantially fan shape is printed on the lower surface of the substrate 25, and two drive coils 26 are formed by the printed conductor pattern. . The two driving coils 26 are formed by sequentially winding a conductive wire pattern in the same direction, and are connected in series.

  One end of the conductive wire pattern forming the two driving coils 26 is disposed on the side surface of one of the two concave portions 25d. The other end of the conductive wire pattern is disposed on the side surface of the other recess 25d. That is, one end side of the conductive wire pattern is formed up to the side surface of the one concave portion 25d, and the other end side of the conductive wire pattern is formed up to the side surface of the other concave portion 25d.

  As shown in FIG. 2, the drive magnet 27 is formed in a flat plate shape. The drive magnet 27 is formed in a substantially fan shape having a notch 27a in a part in the circumferential direction. Specifically, the drive magnet 27 is formed in a substantially fan shape with a central angle of 180 ° or more. Further, the central angle of the drive magnet 27 is formed larger than the central angle θ of the substrate 25. Specifically, the center angle of the drive magnet 27 is formed larger than the center angle θ of the substrate 25 by approximately the same degree as the swing angle of the substrate 25.

  A through hole 27 b in which the bearing portion 28 is disposed is formed at the center of the driving magnet 27. The through hole 27b is formed in a substantially round hole shape connected to the notch 27a. As shown in FIG. 2, the drive magnet 27 is magnetized in multiple poles in the circumferential direction. The driving magnet 27 includes, for example, two substantially fan-shaped magnet pieces 27A whose upper surface is magnetized to N poles and two substantially fan-shaped magnet pieces 27B whose upper surfaces are magnetized to S poles. They are arranged alternately in the clockwise direction. The drive magnet 27 may be composed of a single magnet piece, and the upper surface of the single magnet piece may be magnetized in multiple poles in the circumferential direction.

  The bearing portion 28 has a lower end fixed to the center portion of the base member 6 and a center shaft 34 disposed at the center of the bearing portion 28, a rolling bearing 35 in which an inner ring is fixed to the center shaft 34, and a rolling bearing 35. A substrate support member 36 that is fixed to the outer ring and supports the substrate 25, and annular spacers 37 that are disposed on both upper and lower sides of the rolling bearing 35 are provided.

  The substrate support member 36 is formed in a cylindrical shape, and an inner peripheral surface thereof is fixed to an outer ring of the rolling bearing 35. Further, the peripheral portion of the through hole 25b of the substrate 25 is placed and fixed on the upper end surface of the substrate support member 36, and the substrate 25 is rotatable about the central axis 34. The substrate 25 is urged counterclockwise by an urging member (not shown) such as a tension coil spring.

  The spacers 37 are in contact with the upper and lower ends of the inner ring of the rolling bearing 35. Further, as shown in FIG. 9, the spacer 37 is in contact with the lower surface of an upper surface portion 7 a described later constituting the cover member 7 or the upper surface of the base member 6.

  The reduction plate 29 is made of a nonmagnetic material. The speed reducing plate 29 is formed in a flat plate shape. As shown in FIG. 2, a through hole 29 a for preventing contact with the bearing portion 28 is formed at the center of the speed reduction plate 29. Further, the reduction plate 29 is formed with an engagement protrusion 29 b that engages with the engagement groove 25 c of the substrate 25 and a support portion 29 c that is supported by the fulcrum shaft 33.

  The engaging protrusion 29 b is formed on the outer peripheral side portion of the speed reducing plate 29. Further, the engagement protrusion 29 b is formed in a columnar shape protruding upward from the upper surface of the speed reduction plate 29. In the present embodiment, the engagement groove 25c and the engagement protrusion 29b constitute a first connection portion 39 where the substrate 25 and the speed reduction plate 29 are connected. In the first connecting portion 39, the substrate 25 and the speed reducing plate 29 are connected so that the substrate 25 and the speed reducing plate 29 can be relatively rotated around the first connecting portion 39.

  The support portion 29c is formed so as to protrude outward in the radial direction. Specifically, the support portion 29c is formed so as to protrude toward the opposite side to the portion where the engagement protrusion 29b is formed with respect to the through hole 29a. Further, a linear groove 29d is formed from the through hole 29a toward the support portion 29c. Specifically, the groove 29d is formed such that the center of the engagement protrusion 29b, the center of the groove 29d, and the center of the through hole 29a are arranged on substantially the same straight line.

  The radially outer end of the support portion 29 c is an abutting portion 29 e that abuts a later-described connecting member 41 constituting the connecting mechanism 30. Moreover, the radial direction outer side part of the support part 29c is arrange | positioned in the arrangement | positioning groove part 41c formed in the connection member 41 mentioned later.

  The fulcrum shaft 33 is formed in a substantially cylindrical shape. The fulcrum shaft 33 is fixed to the upper surface of the base member 6 so that the axial direction and the vertical direction substantially coincide with each other. A small-diameter portion 33 a having a reduced diameter is formed at an intermediate position in the axial direction of the fulcrum shaft 33. The width of the small diameter portion 33 a in the vertical direction is slightly wider than the thickness of the speed reducing plate 29. The diameter of the small diameter portion 33a is slightly smaller than the width of the groove 29d of the reduction plate 29, and the diameter of the fulcrum shaft 33 other than the small diameter portion 33a is larger than the width of the groove 29d. The small diameter portion 33a is engaged with the groove 29d, and the speed reducing plate 29 is held by the fulcrum shaft 33 so as to be rotatable about the fulcrum shaft 33.

  As shown in FIG. 8, the substrate 25 is fixed to the upper end surface of the substrate support member 36 so that the cutout portion 25 a of the substrate 25 and the cutout portion 27 a of the drive magnet 27 overlap in the vertical direction. It is fixed to the upper surface of the base member 6. The speed reducing plate 29 is disposed between the substrate 25 and the driving magnet 27 in the vertical direction. In other words, the speed reducing plate 29 is disposed between the driving coil 26 and the driving magnet 27 formed on the lower surface of the substrate 25 in the vertical direction, and the lower surface of the driving coil 26 and the upper surface of the driving magnet 27. Is opposed in the vertical direction with the speed reduction plate 29 disposed therebetween.

  In the present embodiment, of the radial sides 26a and 26b of the drive coil 26 substantially parallel to the radial direction of the substrate 25, the radial side 26a disposed on the counterclockwise side and the magnet piece 27A face each other. Yes. Further, of the radial sides 26a and 26b, the radial side 26b disposed on the clockwise side and the magnet piece 27B are opposed to each other. As shown in FIG. 9, in the vertical direction, a slight gap is formed between the lower surface of the substrate 25 and the upper surface of the reduction plate 29, and between the lower surface of the reduction plate 29 and the upper surface of the driving magnet 27. A slight gap is formed in. A support member (not shown) that contacts the lower surface of the reduction plate 29 and supports the reduction plate 29 is fixed to the upper surface of the drive magnet 27. The support member is made of a material having excellent slidability, and the reduction plate 29 is supported by the support member and the fulcrum shaft 33.

  The connection mechanism 30 includes a connection member 41 in which a holding recess 41a that holds the connection portion 14d of the valve body 14 is formed, a holding member 42 that rotatably holds the right end side of the connection member 41, and the valve body 14 flows in. A holding magnet 43 for maintaining the state where the portion 12 is closed and a magnetic member 44 serving as a back yoke of the holding magnet 43 are provided.

  The connecting member 41 is made of a magnetic material. The connecting member 41 is formed in a substantially block shape. As shown in FIG. 10, the connecting member 41 includes a rotation center portion 41 b held by the holding member 42 and a radially outer portion of the support portion 29 c of the speed reduction plate 29 in addition to the above-described holding recess 41 a. And a contact surface 41d with which the contact portion 29e of the speed reducing plate 29 contacts. The connecting member 41 has a function of transmitting power from the speed reducing plate 29 to the valve body 14. That is, the connecting member 41 functions to connect the speed reducing plate 29 and the valve body 14.

  The holding recess 41 a is formed so as to be recessed from the rear surface of the connecting member 41 toward the front side. A pair of retaining protrusions 41e for preventing the connecting portion 14d of the valve body 14 disposed in the retaining recess 41a from coming off is formed on the edge of the retaining recess 41a (see FIG. 10). In the present embodiment, the connecting portion 14d and the holding recess 41a constitute a second connecting portion 45 where the valve body 14 and the connecting member 41 are connected.

  The rotation center portion 41 b is formed on the right end side of the connecting member 41, and the arrangement groove portion 41 c is formed on the left end side of the connecting member 41. The contact surface 41d constitutes a part of the front surface of the connecting member 41 and is formed on the right side of the arrangement groove portion 41c.

  The holding member 42 is formed in a rectangular flat plate shape. At the rear end of the holding member 42, as shown in FIG. 2, a holding groove 42a in which the rotation center portion 41b of the connecting member 41 is rotatably held is formed so as to be recessed toward the front side. The holding magnet 43 is formed in a rectangular flat plate shape and is disposed in front of the connecting member 41. The magnetic member 44 is formed in a rectangular flat plate shape and is fixed to the front end of the holding member 42. The front surface of the holding magnet 43 is fixed to the rear surface of the magnetic member 44.

  As described above, the connecting member 41 is made of a magnetic material. Therefore, a magnetic attractive force corresponding to the distance between the connecting member 41 and the holding magnet 43 is generated between the connecting member 41 and the holding magnet 43. In this embodiment, the coupling member 41 and the holding magnet 43 constitute a magnetic attraction mechanism 48 as an urging mechanism for maintaining the state where the valve portion 14c is in contact with the inclined surface portion 12d. Moreover, the connection member 41 of this form is a magnetic member attached to the connection part 14d used as the front end of the piston part 14a.

  In this embodiment, when the speed reducing plate 29 rotates clockwise, the contact portion 29e of the speed reducing plate 29 contacts the contact surface 41d and pushes the contact surface 41d rearward. When the contact surface 41d is pushed rearward, the connecting member 41 rotates counterclockwise about the rotation center portion 41b. When the connecting member 41 rotates counterclockwise, the connecting member 41 moves the piston portion 14a to the rear side.

  On the other hand, when the speed reduction plate 29 is rotated counterclockwise with the piston portion 14a being pushed rearward, due to the attractive force between the connecting member 41 and the holding magnet 43 and the restoring force of the diaphragm portion 14b, The connecting member 41 rotates clockwise around the rotation center portion 41b, and the piston portion 14a moves to the front side.

  As shown in FIG. 8 and the like, the notches 25 a and 27 a are disposed at the right rear end portion of the valve device 1. Moreover, the valve mechanism 4, the connection mechanism 30, and the fulcrum shaft 33 are arrange | positioned at the notches 25a and 27a. Specifically, the valve mechanism 4 is disposed at the right rear end of the valve device 1, the coupling mechanism 30 is disposed on the front side of the valve mechanism 4, and the fulcrum shaft 33 is disposed on the left side of the coupling mechanism 30. In this embodiment, the valve mechanism 4 is arranged so that the inlet 2 and the outlet 3 are arranged on the rear surface of the valve device 1.

  Further, as shown in FIG. 8, the distance from the first connecting portion 39 to the fulcrum shaft 33 is longer than the distance from the first connecting portion 39 to the bearing portion 28. The distance from the first connecting portion 39 to the fulcrum shaft 33 is longer than the distance from the second connecting portion 45 to the fulcrum shaft 33. Therefore, the swing of the substrate 25 is decelerated and transmitted to the valve body 14.

  The base member 6 is made of a magnetic material. As shown in FIG. 9, a fixing hole 6 a for fixing the lower end of the center shaft 34 is formed at the center of the base member 6. The cover member 7 is made of a magnetic material. The cover member 7 includes an upper surface portion 7 a that covers the upper surface side of the substrate 25, and a side surface portion 7 b that covers the side surface of the valve drive mechanism 5. The upper surface portion 7a is formed with a fixing hole 7c to which the upper end of the central shaft 34 is fixed, and the upper end of the central shaft 34 is inserted and fixed in the fixing hole 7c. Further, the lower end of the side surface portion 7 b is fixed to the end portion of the base member 6.

  The terminal 31 is disposed at the right front end and the left rear end of the valve device 1 while being held by the terminal block 32. In this embodiment, the end of the driving coil 26 and the terminal 31 are connected via the lead wire 47. The lead wire 47 is routed along the side surface of the substrate 25. Specifically, the lead wire 47 is routed from the recess 25 d of the substrate 25 to the terminal 31 along the side surface of the substrate 25.

(Schematic operation of the valve device)
FIG. 11 is a plan view showing a state of the valve device 1 shown in FIG. 1 when the valve body 14 opens the inflow portion 12.

  A schematic operation of the valve device 1 configured as described above will be described.

  When no current is supplied to the drive coil 26, the substrate 25 is urged counterclockwise by an urging member (not shown) as shown in FIG. At this time, the speed reducing plate 29 is also urged counterclockwise. Further, the connecting member 41 is disposed at a position close to the holding magnet 43, and the piston portion 14 a is pulled forward by a predetermined attractive force generated between the connecting member 41 and the holding magnet 43.

  Accordingly, at this time, the valve portion 14c is in contact with the inclined surface portion 12d of the inflow portion 12, and the inflow portion 12 is closed. That is, when no current is supplied to the driving coil 26, the inflow portion 12 is closed by the valve body 14, and no fluid flows from the inflow port 2 toward the outflow port 3. At this time, the state in which the valve body 14 closes the inflow portion 12 is maintained by the attractive force generated between the connecting member 41 and the holding magnet 43.

  When a current is supplied to the drive coil 26, the substrate 25 rotates clockwise about the bearing portion 28 as shown in FIG. Further, the speed reducing plate 29 also rotates clockwise about the fulcrum shaft 33. When the speed reducing plate 29 rotates in the clockwise direction, the contact portion 29e of the speed reducing plate 29 pushes the contact surface 41d rearward, and the connecting member 41 rotates in the counterclockwise direction around the rotation center portion 41b. . When the connecting member 41 rotates counterclockwise, the piston portion 14a moves rearward, the valve portion 14c is separated from the inclined surface portion 12d, and the inflow portion 12 is opened. When the inflow portion 12 is opened, the fluid flows from the inflow port 2 toward the outflow port 3. Thus, by the opening operation of the valve body 14 by the valve drive mechanism 5, the valve portion 14 c is separated from the inclined surface portion 12 d, the fluid flows into the valve chamber 10 from the inflow portion 12, and the fluid flows out from the outflow portion 10.

  Further, when the supply of current to the driving coil 26 is stopped in a state where the fluid flows from the inlet 2 to the outlet 3, the substrate 25 is moved by the biasing force of a biasing member (not shown). It rotates counterclockwise around the bearing portion 28. The speed reducing plate 29 also rotates counterclockwise around the fulcrum shaft 33. When the speed reducing plate 29 rotates counterclockwise, the connecting member 41 rotates clockwise around the rotation center 41b by the attractive force between the connecting member 41 and the holding magnet 43 and the restoring force of the diaphragm portion 14b. The piston portion 14a moves to the front side. When the piston portion 14a moves forward, the valve portion 14c comes into contact with the inclined surface portion 12d of the inflow portion 12, the inflow portion 12 is closed, and the flow of fluid from the inflow port 2 to the outflow port 3 stops. As described above, when the valve body 14 is closed by the valve driving mechanism 5, the valve portion 14 c comes into contact with the inclined surface portion 12 d, and the inflow of fluid from the inflow portion 12 to the valve chamber 10 is stopped and from the outflow portion 13. The fluid outflow stops.

(Main effects of this form)
As described above, in this embodiment, the inflow portion 12 includes the small diameter portion 12a and the large diameter portion 12b, and the small diameter portion 12a is disposed on the front side of the large diameter portion 12b. The shaft portion 14f of the piston portion 14a is disposed in the valve chamber 10 and the small diameter portion 12a. Furthermore, the diameter of the valve part 14c is larger than the diameter of the small diameter part 12a and smaller than the diameter of the large diameter part 12b, and the valve part 14c opens and closes the inclined surface part 12d. Therefore, in this embodiment, the piston portion 14a moves to the front side (that is, the piston portion 14a moves toward the valve chamber 10 side with respect to the inflow portion 12) to close the inflow portion 12, The fluid flow can be stopped.

  In this embodiment, the valve portion 14c disposed in the large diameter portion 12b and the shaft portion 14f disposed in the small diameter portion 12a and the like are integrally formed. Therefore, the structure of the valve body 14 can be simplified compared with the case where the valve part 14c and the shaft part 14f are formed separately. Therefore, the configuration of the valve mechanism 4 can be simplified, and the valve mechanism 4 can be reduced in size.

  In this embodiment, the inclined surface portion 12d that is a boundary portion between the small diameter portion 12a and the large diameter portion 12b is formed in an inclined surface shape that is inclined so as to spread outward in the radial direction toward the rear side. Further, the front end side of the valve portion 14c is a boundary contact portion 14e formed in a truncated cone shape so as to spread outward in the radial direction toward the rear side. Therefore, it becomes possible to make the inclined surface part 12d and the valve part 14c contact reliably. In particular, in this embodiment, since the valve body 14 is made of rubber, the inclined surface portion 12d and the valve portion 14c can be brought into close contact with each other. Therefore, even if it is the valve mechanism 4 which the piston part 14a moves toward the valve chamber 10 side with respect to the inflow part 12 and closes the inflow part 12, the inflow part 12 is reliably closed by the valve part 14c. It becomes possible. In this embodiment, since the inclination angle of the inclined surface portion 12d with respect to the front-rear direction is larger than the inclination angle of the boundary contact portion 14e with respect to the front-rear direction, the boundary contact portion 14e is more likely to contact the inclined surface portion 12d. At the same time, the boundary contact portion 14e can be easily separated from the inclined surface portion 12d.

  In this embodiment, the inflow portion 12 is closed by the valve portion 14c. Accordingly, when the valve body 14 closes the inflow portion 12 and the pressure on the fluid inflow side increases, the valve portion 14c is pressed against the inclined surface portion 12d with a pressing force proportional to the pressure. It is possible to reliably stop the flow of fluid into the. As a result, it is possible to reliably prevent fluid leakage from the valve mechanism 4 when the valve body 14 closes the inflow portion 12.

  In this embodiment, the diaphragm portion 14b that movably holds the piston portion 14a performs a sealing function to prevent fluid leakage from the valve chamber 10 at the joint of the first main body portion 19 and the second main body portion 20. . Therefore, it is not necessary to separately provide a seal member at the joint between the first main body 19 and the second main body 20. Therefore, the configuration of the valve mechanism 4 can be simplified.

  In this embodiment, the valve mechanism 4 includes a rubber seal member 17 in which an inflow hole 17 a connected to the inflow part 12 and an outflow hole 17 b connected to the outflow part 13 are formed. For this reason, it is possible to prevent leakage of fluid flowing into the main body 11 and leakage of fluid flowing out of the main body 11 with a simple configuration using one seal member 17.

  In this embodiment, the diameter of the inflow hole 17a arranged so as to be connected to the large diameter portion 12b is smaller than the diameter of the valve portion 14c. Therefore, as described above, when the valve body 14 moves rearward, the rear end of the valve portion 14 c comes into contact with the seal member 17. Therefore, the movable range to the rear side of the valve body 14 can be regulated by the seal member 17. As a result, it is not necessary to separately provide a restricting member for restricting the movable range to the rear side of the valve body 14 and preventing excessive stress on the diaphragm portion 14b, and the configuration of the valve mechanism 4 is simplified. It becomes possible to become.

  In this embodiment, the state in which the valve body 14 closes the inflow portion 12 is maintained by the magnetic attractive force generated between the connecting member 41 and the holding magnet 43. Therefore, the inflow portion 12 can be reliably closed by the valve body 14, and fluid leakage from the valve chamber 10 can be prevented. Further, as the valve body 14 moves to the rear side in which the valve portion 14c opens the inclined surface portion 12d, the magnetic attractive force between the connecting member 41 and the holding magnet 43 decreases, The power of the valve drive mechanism 5 can be reduced. Therefore, the configuration of the valve drive mechanism 5 can be simplified.

(Other embodiments)
The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention.

  In the embodiment described above, the inflow portion 12 is opened and closed by the valve body 14, but the outflow portion 13 may be opened and closed by the valve body 14. In this case, a small diameter portion corresponding to the small diameter portion 12 a of the inflow portion 12, a large diameter portion corresponding to the large diameter portion 12 b of the inflow portion 12, and an inclined surface portion corresponding to the inclined surface portion 12 d of the inflow portion 12 flow out. Formed in the portion 13.

  In the embodiment described above, the inclined surface portion 12d is formed at the boundary between the small diameter portion 12a and the large diameter portion 12b. In addition, for example, a step surface parallel to the ZX plane may be formed at the boundary between the small diameter portion 12a and the large diameter portion 12b. In this case, the step surface becomes a boundary between the small diameter portion 12a and the large diameter portion 12b, and the valve portion 14c comes into contact with the step surface.

  In the embodiment described above, the valve body 14 is made of rubber. In addition to this, for example, the piston portion 14a may be formed by forming a central portion of the piston portion 14a constituting the valve body 14 from a metal or a hard resin, and baking rubber around it. That is, the central portion of the piston portion 14a may be formed of metal or hard resin, and other portions other than the central portion of the piston portion 14a may be formed of rubber. Specifically, as shown in FIG. 12, a rod-shaped (or linear) core member 50 made of a material having a larger longitudinal elastic modulus and lateral elastic modulus than a rubber such as a metal or a hard resin has a piston portion. You may arrange | position in the center part of 14a. When the core member 50 is made of metal, the core member 50 is inserted into the central portion of the piston portion 14a formed of rubber, so that the core member 50 is disposed at the central portion of the piston portion 14a. Alternatively, the core member 50 may be arranged at the center of the piston portion 14a by insert molding. Further, when the core member 50 is formed of a hard resin, the core member 50 may be disposed at the center of the piston portion 14a by insert molding.

  As described above, the center portion of the piston portion 14a is formed of a hard material having a longitudinal elastic modulus and a transverse elastic modulus larger than those of the surface portion of the piston portion 14a and the diaphragm portion 14b, and the surface portion of the piston portion 14a and the diaphragm portion 14b are formed. Alternatively, it may be formed of a soft material having a smaller longitudinal elastic modulus and lateral elastic modulus than the central portion of the piston portion 14a. In this case, the piston part 14a can be smoothly moved in the front-rear direction. That is, if the central portion of the piston portion 14a is formed of a hard material, the piston portion 14a is not easily deformed even when a force for moving in the front-rear direction acts on the piston portion 14a, and the diaphragm portion 14b is soft. When formed of a material, the diaphragm portion 14b is easily deformed when a force for moving in the front-rear direction is applied to the piston portion 14a, so that the piston portion 14a can be smoothly moved in the front-rear direction. .

  In this case, the surface portion of the piston portion 14a and the diaphragm portion 14b may be made of rubber made of the same material, or may be made of rubber made of different materials. When the surface portion of the piston portion 14a and the diaphragm portion 14b are formed of rubber made of the same material, the configuration of the valve body 14 is simplified compared to the case where the surface portion of the piston portion 14a is made of rubber made of a different material. be able to. Further, the surface portion of the piston portion 14a and the diaphragm portion 14b may be formed of a resin material having rubber properties.

  In the embodiment described above, the valve body 14 is opened and closed by the swinging motion of the substrate 25 with respect to the drive magnet 27. In addition to this, for example, the valve drive mechanism 5 is configured such that the base plate 25 performs a straight movement operation in the front-rear direction with respect to the drive magnet 27, and the valve body 14 is opened and closed by the straight movement operation of the base plate 25. Also good. Moreover, the opening / closing operation | movement of the valve body 14 may be performed using a solenoid, and the opening / closing operation | movement of the valve body 14 may be performed using compressed air.

  In the embodiment described above, the substrate 25 swings with respect to the drive magnet 27 fixed to the base member 6. In addition, for example, the substrate 25 may be fixed to the base member 6 or the cover member 7, and the driving magnet 27 may swing with respect to the substrate 25. That is, the opening / closing operation of the valve body 14 may be performed by the swinging operation of the driving magnet 27 around the bearing portion 28 with respect to the substrate 25. In this case, the driving magnet 27 is connected to the speed reducing plate 29.

  In the embodiment described above, when no current is supplied to the drive coil 26, the piston portion 14a is pulled forward by a predetermined magnetic attraction force generated between the connecting member 41 and the holding magnet 43, and the valve The state where the portion 14c closes the inclined surface portion 12d is maintained. In addition, for example, instead of the holding magnet 43, a spring member such as a tension coil spring or a leaf spring that urges the piston portion 14a forward may be disposed. That is, the urging mechanism for maintaining the state where the valve portion 14c closes the inclined surface portion 12d may be a spring member such as a tension coil spring or a leaf spring. Further, the urging mechanism for maintaining the state where the valve portion 14c closes the inclined surface portion 12d may be an elastic member such as rubber.

  In the embodiment described above, the seal member 17 prevents leakage of fluid flowing into the main body 11 and leakage of fluid flowing out of the main body 11. In addition to this, for example, two O-rings may be used in place of the seal member 17 to prevent leakage of fluid flowing into the main body 11 and leakage of fluid flowing out of the main body 11. In this case, for example, the first main body 19 is not formed with the second arrangement recess 19 b, and the inflow portion 12 and the outflow portion 13 are formed up to the rear end surface of the first main body 19. Further, in this case, an O-ring is disposed on the periphery of the rear end of the inflow portion 12 that becomes the inflow port 2 and the periphery of the rear end of the outflow portion 13 that becomes the outflow port 3.

  In the embodiment described above, when the current is not supplied to the drive coil 26, the inflow portion 12 is closed, and when current is supplied to the drive coil 26, the valve body 14 moves rearward and flows in. Part 12 is opened. In addition to this, for example, when the current is not supplied to the drive coil 26, the inflow portion 12 is opened, and when current is supplied to the drive coil 26, the valve body 14 moves to the front side and flows in. The part 12 may be closed. In this case, an urging member that urges the piston portion 14a rearward may be provided.

  In the embodiment described above, the inlet 2 and the outlet 3 are formed on the rear surface of the valve mechanism 4, but the inlet 2 and / or the outlet 3 may be formed on the upper surface or the lower surface of the valve mechanism 4.

DESCRIPTION OF SYMBOLS 1 Valve apparatus 4 Valve mechanism 5 Valve drive mechanism 10 Valve chamber 11 Main body part 12 Inflow part 12a Small diameter part 12b Large diameter part 12d Inclined surface part (boundary part)
13 Outflow part 14 Valve body 14a Piston part (shaft-shaped member)
14b Diaphragm part (film member)
14c Valve part 14e Boundary contact part 14f Shaft part 17 Seal member 17a Inflow hole 17b Outflow hole 19 1st main body part 20 2nd main body part 41 Connecting member (magnetic member)
43 Holding magnet 48 Magnetic attraction mechanism (biasing mechanism)
50 core member (center of shaft-shaped member)
Y longitudinal direction (axial direction of the shaft-shaped member)

Claims (16)

A main body portion in which a valve chamber is formed and an inflow portion through which the fluid flowing into the valve chamber passes and an outflow portion through which the fluid flowing out of the valve chamber passes, and the inflow portion or the outflow portion A valve body for opening and closing the part,
In the inflow part or the outflow part, a small diameter part and a large diameter part having a diameter larger than the small diameter part are formed, and the small diameter part is disposed on the valve chamber side than the large diameter part,
The valve body includes a shaft-like member disposed in the valve chamber, the small diameter portion, and the large diameter portion,
The shaft-shaped member has a shaft portion partially disposed in the small-diameter portion, a valve portion having a diameter larger than that of the shaft portion and disposed in the large-diameter portion, and formed integrally with the shaft portion. With
The diameter of the valve portion is formed larger than the diameter of the small diameter portion and smaller than the diameter of the large diameter portion,
The valve mechanism opens and closes a boundary portion between the small diameter portion and the large diameter portion. The boundary portion is formed in an inclined surface shape that is inclined so as to spread outward in the radial direction toward the large diameter portion,
The valve mechanism according to claim 1, wherein the valve portion is formed with a sloped boundary contact portion that contacts the boundary portion and closes the boundary portion.   The valve mechanism according to claim 2, wherein an inclination angle of the boundary portion with respect to an axial direction of the shaft-like member is larger than an inclination angle of the boundary contact portion with respect to the axial direction of the shaft-like member. . The small diameter portion and the large diameter portion are formed in the inflow portion,
The valve mechanism according to claim 1, wherein the valve portion opens and closes the inflow portion. The main body includes a first main body and a second main body that can be divided;
The valve body includes a film-like member that holds the shaft-like member so that the shaft-like member can be moved relative to the main body portion in the axial direction.
5. The film member according to any one of claims 1 to 4, wherein the membrane member has a sealing function for preventing fluid leakage from the valve chamber at the joint of the first body portion and the second body portion. The valve mechanism according to the above.   The valve mechanism according to claim 1, wherein the valve body is made of an elastic material. The valve body includes a film-like member that holds the shaft-like member so that the shaft-like member can be moved relative to the main body portion in the axial direction.
The central portion of the shaft-shaped member is formed of a hard material having a larger longitudinal elastic modulus than the surface portion of the shaft-shaped member,
The valve mechanism according to any one of claims 1 to 6, wherein the film-like member is formed of a soft material having a transverse elastic coefficient smaller than that of a central portion of the shaft-like member.   The surface portion of the shaft-like member and the film-like member are formed of the same soft material having a smaller longitudinal elastic modulus and transverse elastic modulus than a central portion of the shaft-like member. Valve mechanism.   The valve mechanism according to any one of claims 1 to 8, further comprising a seal member formed of an elastic material while an inflow hole connected to the inflow portion and an outflow hole connected to the outflow portion are formed. One of the inflow hole or the outflow hole is arranged to be connected to the large diameter portion,
The valve mechanism according to claim 9, wherein a diameter of one of the inflow hole or the outflow hole connected to the large diameter portion is smaller than a diameter of the valve portion.   A valve device comprising: the valve mechanism according to any one of claims 1 to 10; and a valve drive mechanism that opens and closes the valve body with respect to the inflow portion or the outflow portion.   The valve device according to claim 11, further comprising an urging mechanism for maintaining a state in which the valve portion closes the boundary portion.   The valve device according to claim 12, wherein the biasing mechanism is a spring member.   The valve device according to claim 12, wherein the urging mechanism is a magnetic attraction mechanism.   The magnetic attraction mechanism includes a magnetic member attached to one end of the shaft-like member, and a holding magnet that attracts the magnetic member in a direction in which the valve portion closes the boundary portion. Item 15. The valve device according to Item 14. The main body includes a first main body and a second main body that can be divided;
The valve body includes a film-like member that holds the shaft-like member so that the shaft-like member can be relatively moved with respect to the main body.
The membrane member fulfills a sealing function to prevent fluid leakage from the valve chamber at the joint of the first body portion and the second body portion,
In the valve mechanism, the valve portion is separated from the boundary portion by the opening operation of the valve body by the valve driving mechanism, and the valve portion is brought into contact with the boundary portion by the closing operation of the valve body by the valve driving mechanism. And the membrane member is deformed by the opening and closing operation of the valve body by the valve drive mechanism,
In the valve mechanism, when the valve portion is separated from the boundary portion, the fluid flows from the inflow portion into the valve chamber, the fluid flows out from the outflow portion, and the valve portion is in the boundary portion. The fluid flow from the inflow portion to the valve chamber is stopped and the outflow of the fluid from the outflow portion is stopped. Valve device.

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