JP3752586B2 - Fluid controller - Google Patents

Description

  The present invention relates to a fluid controller, and more particularly to a fluid controller having an improved automatic valve that automatically shuts off or opens a fluid passage using fluid pressure.

A valve box provided with a fluid passage, a casing provided at the top of the valve box, a valve body that opens and closes the fluid passage, and a closed position that is moved downward to close the valve body and moved upward. A valve body presser that can be moved to an open position that opens the valve body, an elastic member that biases the valve body in either the closed position direction or the open position direction, and an automatic opening / closing means A fluid controller including an automatic opening / closing operation member that moves a valve body presser to an open position or a closed position against an urging force of an elastic member is well known (Patent Document 1). The fluid controller described in Patent Document 1 is an automatic type (automatic valve) that uses compressed air to move a valve rod as an operation member at the time of automatic opening and closing, but is manually opened and closed by turning an operation handle. A manual fluid controller (manual valve) that moves a valve stem as an actuating member is also well known.
JP 2000-283328 A

  The above-mentioned conventional automatic valve and manual valve are generally combined to form an opening / closing mechanism. In a normal use state, the manual valve is opened, and the fluid passage is opened and shut off by the automatic valve. When the fluid passage needs to be urgently controlled, the operator manually operates the manual valve. Thus, the use of both automatic and manual valves is wasteful in terms of cost and space.

  An object of the present invention is to provide a fluid controller that has both functions of a manual valve and an automatic valve, and therefore can replace a conventional open / close mechanism composed of an automatic valve and a manual valve with a single controller. It is in.

A fluid controller according to a first aspect of the present invention includes a valve box provided with a fluid passage, a casing provided at the top of the valve box, a valve body that opens and closes the fluid passage, and a valve body that is moved downward to close the valve body. A valve body retainer that is moved to a closed position and an open position that is moved upward to open the valve body, and an elastic member that biases the valve body in either the closed position direction or the open position direction A fluid controller having an automatic opening / closing operation member that is moved up and down by the compressed fluid introduction / discharge means to move the valve body presser to the open position or the closed position against the biasing force of the elastic member. It is further provided with a manual opening / closing operating member that is moved up and down by an operation and moved downward to press the valve body presser downward. Automatic opening and closing Regardless of the position of the operating member during automatic opening / closing, and the operating member during automatic opening / closing is in the open position, and the operating member during manual opening / closing is closed. A compressed fluid discharge passage for reducing the pressure in the compressed fluid introduction chamber that resists manual operation when moving to the position is formed .

  The fluid controller may be a normally open type that opens the fluid passage when the automatic opening / closing means is off, or a normally closed type that closes the fluid passage when the automatic opening / closing means is off.

  The automatic opening / closing means may be performed by introducing or discharging a compressed fluid into a compressed fluid introduction chamber formed in the casing, or may be performed by electromagnetic force.

  When the manual opening / closing operation member presses the valve body presser downward, it may be performed via the automatic opening / closing operation member, and the manual opening / closing operation member does not go through the automatic opening / closing operation member ( (Directly) The pressure on the valve body may be pressed. The first embodiment (claims 2 to 5) belongs to the former, and the second embodiment (claims 6 to 8) belongs to the latter. In the first embodiment, a valve rod (rod-like body) that is an automatic opening / closing operation member in an automatic valve is applied to the automatic opening / closing operation member of the present invention, and the manual opening / closing operation is moved downward by manual operation. The member moves the operation member at the time of automatic opening / closing downward, and accordingly, the operation member at the time of automatic opening / closing presses the valve body presser downward. In the second embodiment, a valve rod (rod-like body) that is an operation member at the time of manual opening / closing in the manual valve is applied to the operation member at the time of manual opening / closing of the present invention, and the operation at the time of manual opening / closing moved downward by a manual operation. The member directly presses down the valve body presser, and the automatic opening / closing operation member is moved up and down by the automatic opening / closing means irrespective of the vertical movement of the operation member during manual opening / closing.

  As a more specific configuration of the fluid controller, for example, the fluid controller further includes a movable passage member that is movably fitted into a manual opening / closing operation member that is a cylindrical body, and the manual opening / closing operation member includes a casing. An automatic opening / closing position having a predetermined gap between the upper surface of the part that moves integrally with the automatic opening and closing member by manually operating the operation handle and arranged in a fluid-tight manner inside the automatic opening and closing member, The movable passage member is moved to the position where it cannot be automatically opened / closed, which is in contact with the upper surface of the part that moves as a unit, and to the operating position where it is further moved downward to lower the operating member during automatic opening / closing. It is designed to stop at a position where the movement amount is smaller than the movement amount when moving from the position where automatic opening and closing is possible to the position where automatic opening and closing is not possible. An automatic open / close compressed fluid passage is formed in the lower part of the working member and extends downward from the upper end to the compressed fluid introduction chamber, and is located at a position corresponding to the lower end of the movable passage member in the casing. A fluid discharge passage is formed in a position corresponding to the vicinity of the upper end of the compressed fluid passage and the movable passage member, and the casing is compressed when the manual opening / closing operation member is in the automatic opening / closing position. A compressed fluid passage that leads to the fluid passage and a fluid discharge passage that leads to the fluid discharge passage of the casing when the operating member at the time of manual opening and closing is lowered to a position where automatic opening and closing cannot be formed are formed. A compressed fluid passage communicating the compressed fluid passage in the operating member during manual opening and closing and the compressed fluid passage in the operating member during automatic opening and closing when in the openable / closable position; When the movable passage member is moved upward relative to the operation member at the time of manual opening / closing when the valve is lowered to the position where automatic opening / closing is impossible, the fluid discharge passage in the operation member at manual opening / closing and the compressed fluid in the operation member at automatic opening / closing A fluid discharge passage is formed in communication with the passage, and when the manual opening / closing operation member is in a position capable of automatic opening and closing, the communication is blocked (invention of claim 2).

  In the invention of claim 2, the portion that moves integrally with the rod-shaped body is usually a piston that forms the upper surface of the compressed fluid introduction chamber. The manual opening / closing operation member is integrated via an operation handle and an operation shaft, and the manual opening / closing operation member is provided with a male screw portion that is provided in the casing and screwed to the screw portion. Accordingly, by rotating the operation handle, the manual opening / closing operation member at the automatic opening / closing position is lowered while rotating. The operation angle of the handle is not particularly limited, but the operability is improved by setting this angle to 90 °. The compressed fluid passage and the fluid discharge passage formed in the casing, rod-like body, manual opening / closing operation member and movable passage member are not particularly limited, and the compressed fluid introduction chamber and the outside of the casing can communicate with each other manually. Various configurations are possible so that the opening and closing operation member and the movable passage member can be shut off with movement.

  According to the fluid controller of the second aspect of the present invention, the operating member is normally held at the automatic opening / closing position at the time of manual opening / closing, and in this state, the compressed fluid is externally supplied via the compression fluid passage formed in the fluid controller. It is possible to introduce the compressed fluid into the introduction chamber and discharge the compressed fluid from the compressed fluid introduction chamber to the outside. That is, this fluid controller functions as a normal automatic valve. When the operating member is moved to a position where it cannot be automatically opened and closed by operating the operating handle, the lower surface of the operating member at the time of manual opening and closing comes into contact with the upper surface of the portion that moves integrally with the rod-shaped body, and at the same time, the fluid controller The compressed fluid is discharged from the compressed fluid introduction chamber to the outside through the fluid discharge passage formed in the above. As a result, the pressure inside the compressed fluid introduction chamber acting on the rod-like body is eliminated. When the operation handle is further moved from this state, the operating member at the time of manual opening / closing further moves downward, and accordingly, the rod-like body moves downward. In this way, the movement of the rod-like body by the manual operation in an emergency, that is, the channel opening / closing operation can be easily performed.

  As a means for stopping the movable passage member at a position of a movement amount smaller than the movement amount of the operation member at the time of manual opening / closing, for example, an elastic member (compression coil spring, disc spring, etc.) for biasing the movable passage member downward And a stopper provided on the rod-like body for stopping further lowering of the movable passage member. The stopper is, for example, an annular groove formed at the upper end of the rod-like body or an annular seal member (O-ring or the like) received by the annular step, and the lower end of the movable passage member abuts against the annular seal member. The

  In this way, the movable passage member is lowered integrally with the manual opening and closing operation member by first being biased downward by the elastic member as the manual opening and closing operation member is lowered, and then the stopper Is stopped by. When the manual opening / closing operation member is further lowered, the movable passage member is moved upward relative to the manual opening / closing operation member. By using the stopper as the annular seal member, the compressed fluid passage formed between the upper end portion of the rod-like body and the movable passage member can be reliably blocked from high-pressure fluid.

  The movable passage member is formed in a substantially cylindrical shape having a flange portion near the upper end portion, and an annular groove in which the flange portion of the movable passage member is fitted to the operation member at the time of manual opening and closing so as to be movable up and down, and the annular groove and the casing wall A fluid discharge passage that communicates with the fluid discharge passage, and is annularly pressed downward by the flange portion of the movable passage member biased by the elastic member in the automatic opening and closing position into the annular groove of the operation member at the time of manual opening and closing A seal member is preferably interposed.

  If it does in this way, interruption | blocking and communication of a fluid discharge passage can be performed reliably and with a simple structure.

  A convex portion is formed on the upper end portion of the operating member during manual opening and closing, and a recess is formed in the lower end portion of the operating shaft fixed to the operation handle. A plurality of protrusions formed at predetermined intervals in the circumferential direction are formed at equal intervals on either one of the inner circumferences, and grooves at an integral multiple of the number of these protrusions are equally spaced on the other It is preferable that it is formed. In this case, it is more preferable that one side is formed into a shape having a large number of projections and depressions (about 20 to 40) such as serrations and 9 to 18 degrees can be adjusted by shifting the fitting by one.

  In this way, the operation handle and the operation member at the time of manual opening / closing can be easily integrated, and the operation shaft can be fitted to the operation member at the time of manual opening / closing so that the handle faces a predetermined direction.

A fluid controller according to a second aspect of the present invention includes a valve box provided with a fluid passage, a casing provided at the top of the valve box, a valve body that opens and closes the fluid passage, and is moved downward to close the valve body. A valve body retainer that is moved to a closed position and an open position that is moved upward to open the valve body, and an elastic member that biases the valve body in either the closed position direction or the open position direction A fluid controller having an automatic opening / closing operation member that is moved up and down by an automatic opening / closing means to move the valve body presser to an open position or a closed position against the urging force of the elastic member. It is further provided with a manual opening / closing operation member that presses the valve body presser downward by being moved and moved downward, and the manual opening / closing operation member presses the center of the top surface of the valve body presser downward at the lower end. Automatic opening and closing impossible It is a rod-like body that can be moved by manual operation to a position where the lower end is separated from the center of the top surface of the mounting and valve body presser. Closed position where the lower end presses the bottom edge of the top surface of the valve body presser downward, and the open position where the lower end is separated from the center part of the top surface of the valve body presser by automatic opening / closing means. It is made into a cylindrical body that can be moved to a closed position in an emergency in which the operation member at the time of manual opening / closing is moved to the closed position when the operation member at the time of automatic opening / closing is at the open position. Ru der things to.

  According to the invention of claim 6, the specific configuration (compressed air type, electromagnetic type, etc.) of the automatic opening / closing means can be made arbitrary, and the operation of the manual operation member is automatically performed from the automatic opening / closing means. This can be done regardless of the force acting on the operating member during opening and closing.

  In this case, an upper guide portion and a lower guide portion defined by a counter plate are formed in the casing, and the automatic opening / closing operation member includes an upper piston portion guided by the upper guide portion, and a lower guide portion. A lower piston portion guided by the valve, and a compressed air introduction chamber is formed between the counter plate and the upper piston portion of the automatic opening and closing operation member, and the manual opening and closing operation member includes an axial passage, Extending radially from the axial passage and extending radially from the lower end radial passage that communicates with the compressed air introduction chamber through a radial through hole provided in the operating member at the time of automatic opening and closing, and an intermediate portion of the axial passage There may be an intermediate radial passage that communicates with a compressed fluid introduction portion provided on the peripheral wall of the casing body. For example, when the fluid controller is a diaphragm valve, the automatic opening / closing means is preferably a compressed air type, but by forming passages such as an axial passage and a radial passage in the operation member during manual opening / closing, A diaphragm valve having a compact configuration and capable of automatic and manual operation can be obtained.

  Furthermore, the gap in the inner periphery of the automatic opening and closing operation member, the second radial through hole formed in the automatic opening and closing operation member, and the clearance in the outer periphery of the automatic opening and closing operation member, The lower end radial passage and the space below the lower piston portion of the operating member during automatic opening and closing may be communicated with each other. In this way, not only the compressed air introduction chamber formed between the counter plate and the upper piston portion of the automatic opening / closing operation member, but also the space below the lower piston portion becomes the compressed air introduction chamber. Without adding, it is possible to increase the force of pushing the operating member upward during automatic opening and closing.

  According to the fluid controller of the present invention, the operation member is normally held at a position where it can be automatically opened / closed at the time of manual opening / closing. The fluid passage can be opened and closed by introducing the compressed fluid into the compressed fluid introducing chamber and discharging the compressed fluid from the compressed fluid introducing chamber to the outside. That is, this fluid controller functions as a normal automatic valve. When the operating member is operated to move the operating member to a position where automatic opening / closing cannot be performed, the operating member during manual opening / closing presses the valve body presser downward directly via the operating member during automatic opening / closing. In this way, the operation of shutting off the fluid passage by manual operation in an emergency can be easily performed.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the left and right refer to the left and right in the figure.

  1 to 6 show a first embodiment of the fluid controller of the present invention. 1 and 2 show that the cylindrical body (15) as an operating member at the time of manual opening / closing is in an automatically openable / closable position and the rod-like body (9) as an operating member at the time of automatic opening / closing is in an automatically openable / closable state. FIG. 5 and FIG. 6 show that the cylindrical body (15) as the operation member at the time of manual opening / closing is in a position where automatic opening / closing is impossible, and the position of the rod-like body (9) as the operation member at the time of automatic opening / closing is Each of the states regulated by the state body (15) is shown.

  The fluid controller (1) of the first embodiment includes a valve box (2) having a fluid inflow passage (2a) and a fluid outflow passage (2b), and a peripheral edge of the upward opening of the fluid inflow passage (2a). An annular valve seat (3) provided, and a diaphragm (valve element) that opens and closes the fluid inflow passage (2a) when pressed (moved in the closing direction) or separated (moved in the opening direction) by the annular valve seat (3) ( 4), a valve body holder (5) that can move up and down to hold down the diaphragm (4), and a cylindrical bonnet (6) that extends upward by inserting a lower end into a recess formed in the valve box (2). A cap nut (7) for fixing the bonnet (6) to the valve box (2), a casing (8) whose lower end is fixed to the upper end of the bonnet (6), and a bonnet (6) that can be moved up and down. The upper part of the rod-like body (9) as an automatic opening / closing operation member in the casing (8) and the lower piston part integrated with the rod-like body (9) near the lower end of the casing (8) ( Ten) A compression coil spring (elastic member for biasing the rod-shaped body) (11) received between the lower end portion of the rod-shaped body (9) and the upper end portion of the bonnet (6) and biasing the rod-shaped body (9) downward; A counter plate (12) fitted to the rod-like body (9) and fixed to the casing (8) above the lower piston portion (10), and a rod-like body (9) above the counter plate (12) in the casing (8). ) Integrated with the upper piston part (13), the lower bearing (14) attached to the rod-shaped body (9) so as to contact the upper surface of the upper piston part (13), and the lower bearing (14). The upper part of the rod-like body (9) at the upper part is fitted with the lower part as a manual opening / closing operation member (15), and the movable part fitted into the upper part of the tubular body (15) so as to be movable up and down. It is disposed between the passage member (16), the operation shaft (17) with the operation handle (18) coupled to the cylindrical body (15), and between the operation shaft (17) and the movable passage member (16). A compression coil spring (elastic member for urging the movable passage member) (19) as an elastic member for urging the moving passage member (16) downward; and an upper surface of the large-diameter shaft portion (61) of the operation shaft (17); An upper bearing (20) disposed between the casing (8) and the lower surface of the top wall is provided.

  The configuration below the upper piston portion (13) is the same as that of a known automatic valve, and detailed description thereof is omitted. Note that the configuration below the upper piston portion (13) is not limited to the illustrated configuration, and can be replaced by various known automatic valve configurations.

  The casing (8) includes a cylindrical casing body (21), a bottom wall portion (22) screwed to a lower end portion of the casing body (21) and fixed to the bonnet (6), and a casing body (21). And a top wall portion (23) fitted on the upper end portion. A rod-like body (9) insertion hole is formed in the bottom wall portion (22), and an operation shaft (17) insertion hole is formed in the top wall portion (23).

  The casing body (21) is connected to the cylinder chamber (24) formed in the lower portion of the casing and slidably guiding the lower and upper pistons (10) and (13), and the upper end of the cylinder chamber (24). A smaller diameter female thread portion (25), a small diameter inner circumferential surface (26) provided at the upper end of the female thread portion (25), and a large diameter circumferential surface (27 And a recess (28) extending in the circumferential direction over approximately ¼ of the circumference at the upper part of the large-diameter circumferential surface (27). The space between the lower piston portion (10) and the casing bottom wall portion (22) is the lower compressed fluid introduction chamber (29), and the space between the upper piston portion (13) and the counter plate (12) is the upper side. A compressed fluid introduction chamber (30) is provided. Further, the casing body (21) has a through-diameter threaded portion (compressed fluid passage in the casing wall) that opens to the lower inner periphery of the small-diameter circumferential surface (26) and is connected to a compressed fluid introduction pipe (31) And a radial through-hole (fluid discharge passage in the casing wall) (32) opened in the upper inner periphery of the small-diameter circumferential surface (26).

  The rod-shaped body (9) includes an axial passage (37) extending from a position slightly below the lower surface of the lower piston portion (10) to near the upper end of the rod-shaped body (9), and a lower end of the axial passage (37). A radial passage (38) extending in the radial direction from the upper portion to the lower compressed fluid introduction chamber (29) and an upper compressed fluid introduction chamber (30) extending in the radial direction from an intermediate portion of the axial passage (37). ) And a radial passage (40) extending radially from the upper end of the axial passage (37) and opening to the outer periphery of the upper end of the rod-like body (9). Is formed. These passages (37), (38), (39), and (40) form a rod-shaped compressed body fluid passage.

  The lower bearing (14) is a thrust bearing, and the lower raceway is integrated with the upper surface of the upper piston part (13), and the upper raceway is automatically formed by the cylindrical body (15) shown in FIG. In a normal state at the openable / closable position, the cylinder (15) is arranged so as to be slightly spaced from the lower surface.

  The cylindrical body (15) is formed on the casing main body (21), and thus is connected to the male screw portion (41) screwed to the screw portion (25) and the upper end of the male screw portion (41). A sliding portion (42) slidably fitted on the small-diameter inner peripheral surface (26) of the main body (21), and a lower end surface of the operating shaft (17) provided at the upper end portion of the sliding portion (42) And a convex portion (43) fitted in the concave portion (62) formed in the inner surface. When the cylindrical body (15) is rotated, the male thread portion (41) rotates with respect to the female thread portion (25) of the casing body (21), and the cylindrical body (15) descends while rotating. .

  As shown in FIG. 2, the movable passage member (16) has a large-diameter shaft portion (51) slidably fitted in the cylindrical body (15), and an upper end of the large-diameter shaft portion (51). A continuous small-diameter shaft (52), a circular recess (53) provided in the lower end surface of the large-diameter shaft (51), and a flange (54) provided near the upper end of the small-diameter shaft (52) And have.

  The operating shaft (17) includes a large-diameter portion (61) having a circular recess (62) fitted to the convex portion (43) of the cylindrical body (15) on the lower end surface, and a large-diameter portion. A small-diameter portion (63) connected to the upper end of (61) and a radial protrusion (64) provided on the outer periphery of the large-diameter portion (61) and fitted into the recess (28) of the casing body (21) And have. The small-diameter portion (63) penetrates the casing top wall portion (23) and protrudes above it. The recess (28) of the casing body (21) is formed so as to extend in the circumferential direction over approximately 1/4 of the circumference (actually, more than 1/4 considering variation) The rotatable angle of the operation shaft (17) is approximately 90 ° (90 ° or more).

  The operation handle (18) is fixed to the upward projecting portion of the small diameter portion (63) of the operation shaft (17), and the contour shape of the portion fitted into the small diameter portion (63) is substantially oval. A circular flange portion (18a) is formed at the lower end portion.

  The compression coil spring (19) is fitted into the upper end portion of the cylindrical body (15), the upper end thereof is received by the bottom surface of the recess (62) of the operating shaft (17), and the lower end thereof is the movable passage member (16). The upper surface of the flange portion (54) is received.

  The upper bearing (20) is a thrust bearing, and is disposed between the lower surface of the casing top wall portion (23) and the upper surface of the large diameter portion (61) of the operation shaft (17), and the lower raceway is operated. It is fixed to the large diameter part (61) of the shaft (17).

  Although not shown in the drawings, the upper surface of the casing top wall portion (23) is labeled with “Enable (automatically openable / closable)” or “Disabled (automatically openable / non-openable)”. This display character is visible through a window formed in the flange portion (18a).

  Next, the configuration of the upper end portion of the rod-shaped body (9), the cylindrical body (15), and the movable passage member (16) will be described with reference to FIG.

  The upper end portion of the rod-shaped body (9) is formed to have a smaller diameter than the portion below it, and the bottom surface has a small diameter portion (33) at the boundary between the large diameter portion (34) and the small diameter portion (33). ) An annular groove (35) smaller than the inner diameter is formed, and an O-ring (36) is fitted into the annular groove (35). The lower surface of the annular groove (35) protrudes radially outward from the upper surface, and the outer diameter of the O-ring (36) placed on the lower surface is larger than the outer diameter of the upper surface of the annular groove (35). ing. In a normal state in which the cylindrical body (15) is in a position where it can be automatically opened and closed, a gap (G1) serving as a compressed fluid passage is provided between the lower end surface of the movable passage member (16) and the O-ring (36). Exist. The O-ring (36) fitted in the annular groove (35) has a sealing function for blocking the gap (G1) when the movable passage member (16) is further lowered from the position shown in FIG. 2, and the movable passage member (16). It has both functions of a stopper function for determining the lower limit position.

  The inner diameter of the upper end of the sliding part (42) of the cylindrical body (15) is larger than the part below it, and the boundary between the large diameter part (44) and the small diameter part (45) Is formed with an annular groove (46) having a bottom diameter larger than the inner diameter of the large diameter portion. An O-ring (47) is fitted in the annular groove (46). The annular groove (46) has a lower surface protruding radially inward from the upper surface, and the inner diameter of the O-ring (47) placed on the lower surface is smaller than the inner diameter of the upper surface of the annular groove (46). . The O-ring (47) fitted in the annular groove (46) is a gap between the flange portion (54) of the movable passage member (16) and the cylindrical body (15) in the automatic opening and closing state shown in FIG. (G2) Both a sealing function for blocking (see FIG. 6) and a stopper function for determining the stop position of the movable passage member (16) are provided.

  The cylindrical body (15) has a diameter in which one end communicates with the compressed fluid passage (31) in the casing wall and the other end opens to the inner circumference in a normal state where the cylindrical body (15) is in a position where it can be automatically opened and closed. Directional through hole (cylindrical compressed fluid passage) (48) and radial passage above the casing wall fluid discharge passage (32) and blocked by the passage (32) and O-ring (50) A hole (cylindrical fluid discharge passage) (49) is provided.

  The movable passage member (16) includes an axial passage (55) extending from the bottom of the recess (53) to the middle of the small diameter shaft portion (52), and a radial passage extending from the upper end of the axial passage (55). A radial passage (56) is formed in the outer periphery of the small diameter shaft portion (52). When the cylindrical body (15) is in an automatically openable / closable position, there is a gap between the bottom surface of the recess (53) of the movable passage member (16) and the upper end surface of the rod-shaped body (9). The lower end of the axial passage (55) in the movable passage member (16) opens into this gap.

  The fitting between the cylindrical body (15) and the large-diameter shaft portion (51) of the movable passage member (16) is loose, and the outer periphery of the inner periphery of the cylindrical body (15) and the lower portion of the movable passage member (16). An annular gap (57) is formed between the two. The fitting between the cylindrical body (15) and the small diameter shaft portion (52) of the movable passage member (16) is more loose, and the outer periphery of the inner periphery of the cylindrical body (15) and the upper portion of the movable passage member (16). An annular gap (58) is formed between the two. An annular groove is formed on the outer periphery near the upper end of the large-diameter shaft portion (51) of the movable passage member (16), and an O-ring (60) is fitted into the groove. The communication between the annular gap (57) and the upper annular gap (58) is blocked. The fitting between the recess (53) of the movable passage member (15) and the upper end of the rod-shaped body (9) is loose, and the inner surface of the recess (53) and the rod-shaped body (9) of the movable passage member (15) are loose. ) An annular gap (59) is also formed between the outer periphery of the upper end portion. Furthermore, the fitting between the flange portion (54) of the movable passage member (16) and the large diameter portion (44) of the cylindrical body (15) is also loose, and the flange portion (54 ) An annular gap (67) is also formed between the outer periphery and the inner periphery of the large diameter portion (44) of the cylindrical body (15).

  The annular gap (57) at the lower part of the movable passage member (16), the annular gap (59) in the recess (53) of the movable passage member (15), and the lower end surface of the movable passage member (16) and the O-ring (36) The compressed fluid passage of the movable passage member (16) is formed by the gap (G1) between the movable passage member (16). Further, the axial passage (55) and the radial passage (56) in the movable passage member (15), the annular gap (58) in the upper portion of the movable passage member (15), the flange portion of the movable passage member (16) ( The fluid discharge passage of the movable passage member (16) is formed by the annular gap (67) of 54) and the gap (G2) between the flange portion (54) of the movable passage member (16) and the O-ring (47). Has been.

  When the cylindrical body (15) is in a position where it can be automatically opened and closed, the lower end surface of the movable passage member (16) and the O-ring (36) fitted in the annular groove (35) of the rod-shaped body (9) Since there is a slight gap (G1) between the radial passage (40) of the rod-like compressed fluid passage and the compressed fluid passage (31) in the casing wall, the movable passage member (16) recess ( 53) An annular gap (59) on the inner surface, a gap (G1) between the lower end surface of the movable passage member (16) and the O-ring (36), a lower annular gap (57) on the outer periphery of the movable passage member (16), and a cylinder The compressed fluid passage is communicated through the compressed air passage (48) in the body, and thus the compressed fluid passage from the compressed fluid passage (31) in the casing wall to the compressed fluid introduction chamber (29) (30) is opened. The lower surface of the flange portion (54) of the movable passage member (16) presses the O-ring (47), so that the upper annular gap (58) on the outer periphery of the movable passage member (16) and the tubular body fluid discharge passage (49 And the fluid discharge passage is closed.

  Therefore, in the state shown in FIG. 1 and FIG. 2, normal automatic flow path opening and closing is possible by introducing or discharging the compressed fluid from the outside through the compressed fluid passage (31) in the casing wall. Yes.

  As shown in FIG. 4, three protrusions (65) formed at predetermined intervals in the circumferential direction are formed on the outer periphery of the convex portion (43) provided at the upper end portion of the cylindrical body (15). As shown in FIG. 3, the inner periphery of the recess (62) provided in the lower end surface of the large diameter shaft portion (61) of the operation shaft (17) has a groove corresponding to the protrusion (65). A large number of irregularities (serrations) (66) are formed. Therefore, when fitting the cylindrical body (15) and the operating shaft (17), the operating shaft (17) is rotated relative to the cylindrical body (15) within the range of multiples of the pitch of the serration (66). Can be made.

  In this embodiment, when the operating handle (18) is rotated by 90 °, the automatic opening / closing state and the automatic opening / closing state are switched. The closed position and open position of the rod-shaped body (9) vary depending on the individual fluid controller, and the position (rotational direction position) of the cylindrical body (15) integrated with the rod-shaped body (9) also varies. Become. In this case, the position variation can be absorbed by fitting the operation shaft (17) to the cylindrical body (15) so that the operation handle (18) is directed in a predetermined direction. Thus, in the automatic opening / closing state shown in FIG. 1, the longitudinal direction of the operation handle (18) is directed to the front and back of the paper, and in the automatic opening / closing state shown in FIG. It is made to face in the direction.

  When the operating handle (18) is rotated from the state shown in FIGS. 1 and 2, the male thread (41) of the cylindrical body (15) rotates relative to the female thread (25) of the casing body (21). To do. The operation shaft (17) is biased upward by the compression coil spring (19), but is pressed against the lower surface of the casing top wall portion (23) via the upper bearing (20). 18) can be easily rotated relative to the casing (8). As a result, the cylindrical body (15) descends while rotating, and the lower end surface of the cylindrical body (15) comes into contact with the lower bearing (14) (see FIG. 5). At this time, the tubular body fluid discharge passage (49) descends to the same height as the casing wall discharge passage (32). This position is a position where automatic opening and closing is not possible. As shown in an enlarged view in FIG. 6, the lower end surface of the movable passage member (16) is inserted into the annular groove (35) of the rod-like body (9). 36), the communication between the annular gap (59) on the inner periphery of the movable passage member (16) and the lower annular gap (57) on the outer periphery of the movable passage member (16) is thereby blocked, and the casing wall The compressed fluid passage from the inner compressed fluid passage (31) to the compressed fluid introduction chamber (29) (30) is closed. On the other hand, since the downward biasing force from the compression coil spring (19) decreases and the upward biasing force due to the compression of the O-ring (36) increases, the movable passage member (16) increases the force. Stop where you want to balance. When the cylindrical body (15) is further lowered from this balanced state, the movable passage member (16) that cannot follow this moves upward relative to the cylindrical body (15). For this reason, a gap (G2) is generated between the lower surface of the flange portion (54) of the movable passage member (16) and the O-ring (47), and this leads to the radial passage (40) of the rod-like compressed fluid passage. The movable passage member internal fluid discharge passages (55) and (56) include an annular gap (58) on the upper periphery of the movable passage member (16), a flange portion (54) of the movable passage member (16), and an O-ring (47). ), An annular gap (67) between the outer periphery of the flange portion (54) of the movable passage member (16) and the inner periphery of the large diameter portion (44) of the cylindrical body (15), and The compressed fluid introduced into the compressed fluid introduction chambers (29) and (30) is discharged through the tubular body fluid discharge passage (49) and communicated with the casing wall fluid discharge passage (32). Thereby, the pressure in the compressed fluid introduction chambers (29) and (30) against manual operation is eliminated, and the operation handle (18) can be rotated with a small force. After the cylindrical body (15) comes into contact with the lower bearing (14), the rod-shaped body (9) is removed from the cylindrical body (15) via the lower bearing (14) and the upper piston portion (13). With the rotation of the operation handle (18), the force in the direction of rotation is absorbed and lowered with the cylindrical body (15), thereby the valve box (2). The fluid passage (2a) inside is shut off. This shut-off is not performed by a spring, but is performed by tightening the screws (25) and (41). Therefore, even if the pressure of the fluid passage (2a) is a high pressure of 3500 psi, for example, the shut-off can be surely performed.

  7 to 11 show a second embodiment of the fluid controller of the present invention. FIG. 7 shows a state in which the rod-like body (74) as an operation member at the time of manual opening / closing and the cylindrical body (75) as an operation member at the time of automatic opening / closing are in the closed position, and FIG. The rod-like body (74) as the actuating member is in the open position, and the cylindrical body (75) as the actuating member is in the closed position at the time of automatic opening / closing. FIG. 9 and FIG. The rod-shaped body (74) as the operating member is in the open position, and the cylindrical body (75) as the operating member at the time of automatic opening / closing is also in the open state in an automatically openable state. FIG. When the cylindrical body (75) is in the open position, the closed state in an emergency in which the rod-like body (74) as the manual opening / closing operation member is moved to the closed position is shown.

  The fluid controller (71) of the second embodiment includes a valve box (2) having a fluid inflow passage (2a) and a fluid outflow passage (2b), and a peripheral edge of the upward opening of the fluid inflow passage (2a). An annular valve seat (3) provided, and a diaphragm (valve element) that opens and closes the fluid inflow passage (2a) when pressed (moved in the closing direction) or separated (moved in the opening direction) by the annular valve seat (3) ( 4), a valve body holder (5) that can move up and down to hold down the diaphragm (4), a disc (72) with a valve body holder (5) attached to the lower end, and a recess formed in the valve box (2) Cylindrical bonnet (6) with the lower end inserted in place, the cap nut (7) that fixes the bonnet (6) to the valve box (2), and the lower end fixed to the upper end of the bonnet (6) A casing (73), a rod-shaped body (74) as an operating member at the time of manual opening and closing that is provided in the casing (73) and whose lower end portion is inserted through the bonnet (6) so as to be movable up and down, and a rod-shaped body (74) A cylindrical body (75) as an automatic opening / closing operation member fitted to the lower end portion of the cylindrical body so as to be relatively movable up and down, and an annular pressure receiving member fixed to the upper end portion of the cylindrical body (75) are fixed. The upper piston part (76) formed by this, and a compression coil spring (an elastic member for urging the cylindrical body) (77) for urging the cylindrical body (75) downward via the upper piston part (76) ), A counter plate (78) fixed to the casing (73) so as to be relatively movable near the upper end of the cylindrical body (75) below the upper piston part (76), and a rod-shaped body (74) And an operation shaft (17) with an operation handle (18) provided at the upper end.

  The disc (72) is formed in a short cylindrical shape having a flange portion (72a), and a recess (72b) is formed at the lower end of the disc (72b) to which the valve body presser (5) is fitted and fixed. An annular guide portion (6a) for movably guiding the flange portion (72a) of the disc (72) is formed on the inner periphery of the bonnet (6), and the disc (72) and therefore the valve body presser (5) Is movable up and down within a range regulated by the guide portion (6a).

  The casing (73) includes a cylindrical casing body (81), a bottom wall portion (82) screwed to a lower end portion of the casing body (81) and fixed to the bonnet (6), and a casing body (81). And a top wall portion (83) fitted on the upper end portion. The bottom wall (82) is formed with a piston insertion hole through which the cylindrical body (75) is inserted so as to be movable up and down, and the operation shaft (17) is movable up and down on the top wall (83). An operation shaft insertion stepped hole (89) that is inserted through is formed. In the large diameter portion of the stepped hole (89), there is formed a recess (89a) extending in the circumferential direction over approximately ¼ of the circumference.

  On the inner periphery of the casing body (81), there are lower and upper large-diameter guide portions (upper guide portions) (84) and (85) which are partitioned vertically by a counter plate (78), and an upper large-diameter guide portion. (85) is connected to the upper end of the small diameter guide (lower guide) (86), and is connected to the upper end of the small diameter guide (86). And an opening (88) provided at the upper end of 87). Thus, the lower large-diameter guide portion (84) guides the lower piston portion (75a) integrally provided in the intermediate portion of the cylindrical body (75) so as to be movable up and down, and the upper large-diameter guide portion ( 85) guides the upper piston part (76) fixed to the cylindrical body (75) to be movable up and down, and the gap between the counter plate (78) and the upper piston part (76) of the cylindrical body (75) is A compressed fluid introduction chamber (90) is provided.

  The rod-shaped body (74) includes an axial passage (91) extending from substantially the same position as the upper surface of the counter plate (78) to the upper end of the rod-shaped body (74), and a radial direction from the lower end of the axial passage (91). A lower end radial passage (92) communicating with the compressed fluid introduction chamber (90) via a radial through hole (75b) provided in the upper end portion of the extending cylindrical body (75), and an axial passage (91) An intermediate radial passage (93) extending in the radial direction from the intermediate portion and communicating with the compressed fluid introduction portion (94) provided in the peripheral wall of the casing body (81) is formed. The upper end portion of the axial passage (91) has a larger diameter than the portion below it, and a closed ball (95) that closes the upper end opening of the axial passage (91) is provided on this large diameter portion. ing.

  The compressed air introduced from the compressed fluid introduction section (94) reaches the axial passage (91) through the intermediate radial passage (93) of the rod-like body (74), and the inside of the passage (91) is upward and downward. Flowing into. The compressed air that has flowed downward in the axial passage (91) is introduced from the lower end radial passage (92) into the compressed fluid introduction chamber (90) through the radial through hole (75b) of the cylindrical body (75). The The compressed air flowing upward in the axial passage (91) is prevented from being discharged to the outside by a closed ball (95) that closes the upper end opening of the compressed air, thereby compressing the pressure in the compressed fluid introduction chamber (90). Increased to set pressure of air.

  Near the upper end of the rod-like body (74) is formed a male thread portion (97) formed on the casing body (81) and screwed to the screw portion (87), and is formed at the upper end of the male thread portion (97). The continuous portion is coupled to the lower end of the operation shaft (17). When the handle (18) and hence the operating shaft (17) are rotated, the rod-shaped body (74) rotates, and its male thread (97) rotates relative to the female thread (87) of the casing body (81), The rod-like body (74) moves up and down while rotating. FIG. 7 shows a state in which the rod-like body (74) is moved downward and its lower end is in contact with the upper surface of the disk (72), that is, a closed state by manual operation.

  The cylindrical body (75) has an upper piston portion (76) fixed to the upper end thereof, and the upper piston portion (76) is biased downward by the compression coil spring (77). In a state where compressed air is not introduced into the compressed fluid introduction chamber (90) shown in FIG. 7 and is urged downward by the spring (77), the lower end thereof is in contact with the upper surface of the disk (72). Then, as described later, when compressed air is introduced into the compressed fluid introduction chamber (90), the upper piston portion (76) is moved upward by the compressed air, and the lower end of the cylindrical body (75) is It will be away from the upper surface of the disk (72).

  The operating shaft (17) has a large-diameter portion (61) having a circular recess (62) fitted to the coupling portion (95) at the upper end portion of the rod-shaped body (74), and a large-diameter portion (61). A small-diameter portion (63) that continues to the upper end of the portion (61) and passes through the top wall portion (83) of the casing and projects above the top-wall portion (83), and a top wall portion (83 ) Has a radial protrusion (64) (see FIG. 8) fitted in a recess (89a) provided in the large diameter portion of the stepped hole (89) for inserting the operation shaft. The concave portion (89a) of the stepped hole (89) for inserting the operation shaft in the top wall (83) extends over approximately 1/4 of the circumference (actually, more than 1/4 considering variation). By being formed so as to extend in the direction, the rotatable angle of the operation shaft (17) is approximately 90 ° (90 ° or more).

  The operation handle (18) is fixed to the upward projecting portion of the small diameter portion (63) of the operation shaft (17), and the contour shape of the portion fitted into the small diameter portion (63) is substantially oval. Yes. The shape of the operation handle (18) is slightly different from that of the first embodiment. In FIG. 7, the left part is a semi-cylindrical shape, and the right part is a semi-disc shape. This part is exposed to the display part of the top wall part (83), and the display characters “Enabled (automatically openable / closable)” or “Disabled (automatically openable / non-openable)” are visible from the window part (18a). It is said that.

  The upper end of the compression coil spring (77) is received by the upper surface of the upper large-diameter guide portion (85), and the lower end thereof is received by the spring receiving annular recess (76a) provided in the upper piston portion (76). Yes. A lower projecting edge portion (85a) for positioning the compression coil spring (77) is formed on the inner peripheral portion of the upper surface of the large-diameter guide portion (85), and a spring receiving ring of the upper piston portion (76) is formed. An upper projecting edge portion (76b) is formed on the inner peripheral portion of the recess (76a) to improve concentricity when the upper piston portion (76) moves relative to the rod-like body (74).

  The state of FIG. 7 is a state in which the rod-like body (74) as the operation member at the time of manual opening and closing and the cylindrical body (75) as the operation member at the time of automatic opening and closing are both in the automatic opening and closing state. When the compressed air is introduced into the compressed air introduction chamber (90), the cylindrical body (75) moves upward, but the rod-shaped body (74) maintains the state in which the disk (72) is pressed downward. The opening / closing operation by the automatic opening / closing means becomes invalid, and the passage from the fluid inflow passage (2a) to the fluid outflow passage (2b) is not opened even if the opening operation for introducing the compressed air into the compressed air introduction chamber (90) is performed. Will remain blocked.

  When the operation handle (18) is moved to the automatic opening / closing state in the state of FIG. 7, the rod-like body (74) as the operation member at the time of manual opening / closing is moved to the state of FIG. In FIG. 8, the position (state) differs from FIG. 7 in the operation handle (18), the operation shaft (17), and the rod-like body (74). The piston part (76), compression coil spring (77), disk (72), valve disc holder (5), diaphragm (4), etc. have not changed from the state of FIG.

  In the state shown in FIG. 8, when a pipe is connected to the compressed fluid introduction part (94) and compressed air is introduced from here into the compressed air introduction chamber (90), the rod-like body (74) as an operation member at the time of manual opening and closing is moved upward. It will be in the state of FIG. 9 with the state which moved. 9, the position (state) differs from that in FIG. 8 in that the cylindrical body (75), the upper piston part (76), the compression coil spring (77), the disk (72), the valve body presser (5), and the diaphragm (4), and the upper piston portion (76) and the cylindrical body (75) integrated therewith are compressed into the elastic force of the compression coil spring (77) by the compressed air introduced into the compressed air introduction chamber (90). Accordingly, the compression coil spring (77) is compressed, and the force that presses the disc (72) and hence the valve body presser (5) and the diaphragm (4) downward is removed. The diaphragm (4) is moved in the opening direction by the pressure of the fluid in the fluid inflow passage (2a), and the passage from the fluid inflow passage (2a) to the fluid outflow passage (2b) is opened.

  As shown in FIG. 10 in which the main part of FIG. 9 is enlarged, an O-ring (96) is fitted near the lower end of the outer periphery of the rod-like body (74), and the lower end radial passage (92 The O-ring (97) is also fitted above the upper part. Thus, an annular passage (98) is formed between the two O-rings (96) and (97) as a gap between the outer periphery of the rod-shaped body (74) and the inner periphery of the cylindrical body (75). The compressed air in the axial passageway (91) of the body (74) can move from the lower end radial passageway (92) into the annular passageway (98). Further, the cylindrical body (75) communicates with the lower space of the lower piston portion (75a) of the cylindrical body (75) through an annular gap between the outer periphery of the cylindrical body (75) and the inner periphery of the bonnet. An intermediate radial passage (75c) is formed. Accordingly, the compressed air introduced from the compressed fluid introduction section (94) is introduced into the compressed air introduction chamber (90), and the annular passage (98) and the intermediate radial passage (75c) of the cylindrical body (75). The compressed air pressure that pushes the lower piston part (75a) upward and the upper piston part (76) pushes upward is also introduced into the lower space of the lower piston part (75a) of the cylindrical body (75). When the sum of the air pressure and the elastic force of the compression coil spring (77) is balanced, the cylindrical body (75) is stopped. The compressed air pressure that pushes the lower piston part (75a) upward and the compressed air pressure that pushes the upper piston part (76) upward have the same magnitude, and each passage (91) (91) ( 92) (93) is also at this pressure.

  When the operation handle (18) is moved to a position where automatic opening / closing is impossible in the fluid passage open state of FIG. 9, the rod-like body (74) as the operation member at the time of manual opening / closing is moved downward. In FIG. 11, the position (state) differs from FIG. 9 in the operation handle (18), the operation shaft (17), and the rod-like body (74). The piston part (76), compression coil spring (77), disk (72), valve disc holder (5), diaphragm (4), etc. have not changed from the state of FIG. In this state, the cylindrical body (75) is in a state of opening the flow path, but the flow path is closed by manually moving the rod-shaped body (74) downward. That is, in an emergency, the fluid passage (2a) in the valve box (2) can be blocked by manual operation. This shut-off is not performed by a spring, but is performed by tightening the screws (87) and (97), so that the shut-off can be surely performed even when the pressure of the fluid passage (2a) is as high as 3500 psi, for example. 11 is the same as the state in which compressed air is introduced in the state of FIG. 7. In FIG. 11, the position (state) is different from that in FIG. A piston part (76), a compression coil spring (77), a disk (72), a valve body presser (5), and a diaphragm (4).

In the longitudinal cross-sectional view which shows 1st Embodiment of the fluid controller by this invention, the automatic open / close state is shown. It is the principal part expansion longitudinal cross-sectional view. It is a figure which shows the structure of the operating shaft of the fluid controller by this invention, (a) is a longitudinal cross-sectional view, (b) is sectional drawing which follows the BB line of (a). It is a figure which shows the structure of the action | operation member of the fluid controller by this invention, (a) is a longitudinal cross-sectional view, (b) is sectional drawing which follows the BB line of (a). In the longitudinal cross-sectional view which shows 1st Embodiment of the fluid controller by this invention, the automatic open / close state is shown. It is the principal part expansion longitudinal cross-sectional view. In the longitudinal cross-sectional view which shows 2nd Embodiment of the fluid controller by this invention, the automatic open / close state is shown. In the same manner, a closed state where automatic opening and closing is possible is shown. In the same manner, an open state in a state where automatic opening and closing is possible is shown. It is a principal part enlarged view of FIG. Similarly, the closed state in an emergency is shown.

Explanation of symbols

(1) Fluid controller
(2) Valve box
(2a) (2b) Fluid passage
(5) Disc holder
(8) Casing
(9) Rod-shaped body (operation member for automatic opening and closing)
(11) Compression coil spring (elastic member for biasing rod-shaped body)
(15) Cylindrical body (operation member for manual opening and closing)
(16) Movable passage member
(18) Operation handle
(19) Compression coil spring (elastic member for biasing the movable passage member)
(31) Radial through thread (compressed fluid passage in the casing wall)
(32) Radial through hole (fluid discharge passage in casing wall)
(37) (38) (39) (40) Rod-like compressed fluid passage
(43) Convex
(47) O-ring
(48) Radial through hole (compressed fluid passage in working member)
(49) Radial through hole (fluid discharge passage in working member)
(54) Flange
(62) Recess
(65) Protrusion
(66) Serration (groove)
(71) Fluid controller
(73) Casing
(74) Rod-shaped body (operation member for manual opening and closing)
(75) Cylindrical body (operation member for automatic opening and closing)
(75a) Lower piston part
(75b) Radial through hole
(76) Upper piston part
(77) Compression coil spring (elastic member for urging the cylindrical body)
(78) Counter plate
(84) Lower large-diameter guide (lower guide)
(85) Upper large-diameter guide (upper guide)
(90) Compressed air introduction chamber
(91) Axial passage
(92) Bottom radial passage
(93) Intermediate radial passage
(94)) Compressed fluid inlet

Claims (8)

A valve box provided with a fluid passage, a casing provided at the top of the valve box, a valve body that opens and closes the fluid passage, and a closed position that is moved downward to close the valve body and moved upward. The valve body is moved to the open position that opens the valve body, the elastic member that urges the valve body in either the closed position direction or the open position direction, and the compressed fluid introduction / discharge means moves up and down. A fluid controller including an automatic opening / closing operation member that is moved to move to an open position or a closed position against a biasing force of an elastic member.
It is further equipped with a manual opening / closing operation member that pushes the valve body presser down by being moved up and down by manual operation, and the operation member at manual opening / closing cannot move the operation member at automatic opening / closing. Regardless of the position of the operating member during automatic opening / closing, the automatic opening / closing operating member is in the open position and the manual opening / closing is possible. A fluid controller characterized in that a compressed fluid discharge passage is formed to reduce the pressure in the compressed fluid introduction chamber against manual operation when the operating member is moved to the closed position . It further includes a movable passage member that is movably fitted in a manual opening / closing operation member that is a cylindrical body. The manual opening / closing operation member is fluid-tightly disposed in the casing and manually operates the operation handle. Thus, an automatic opening / closing position where there is a predetermined gap between the upper surface of the part that moves together with the operation member during automatic opening / closing, and the automatic opening / closing failure that contacts the upper surface of the part that moves together with the operation member during automatic opening / closing. The movable passage member is moved to a position where the movable member moves further downward and moves to a position where the working member is lowered when the automatic opening / closing operation is performed. It is designed to stop at a position with a movement amount smaller than the movement amount of
The automatic opening / closing operation member has an upper end in the lower part of the manual opening / closing operation member and extends downward from the upper end to the compressed fluid introduction chamber. A compressed fluid passage located at a position corresponding to the vicinity of the lower end portion of the passage member and a fluid discharge passage positioned at a position corresponding to the vicinity of the upper end portion of the movable passage member are formed. And a fluid discharge passage that leads to the fluid discharge passage of the casing when the operating member is lowered to a position that cannot be automatically opened and closed when the manual opening / closing operation member is lowered. The movable passage member communicates with the compressed fluid passage in the operating member at the time of manual opening and closing and the compressed fluid passage in the operating member at the time of automatic opening and closing when the operating member at the time of manual opening and closing is in a position capable of automatic opening and closing. When the manual opening / closing operation member descends to a position where the automatic opening / closing cannot be performed, the movable passage member moves upward relative to the manual opening / closing operation member so A fluid discharge passage is formed in which the discharge passage communicates with the compressed fluid passage in the operating member at the time of automatic opening and closing, and the communication is cut off when the operation member at the time of manual opening and closing is in a position capable of automatic opening and closing. 1 fluid controller. Means for stopping the movable passage member at a position where the movement amount is smaller than the movement amount of the operation member at the time of manual opening and closing is provided on the elastic member for biasing the movable passage member downward and the operation member at the time of automatic opening and closing and is movable. 3. The fluid controller according to claim 2, further comprising a stopper for stopping further lowering of the passage member. The movable passage member is formed in a substantially cylindrical shape having a flange portion near the upper end portion, and an annular groove in which the flange portion of the movable passage member is fitted to the operation member at the time of manual opening and closing so as to be movable up and down, and the annular groove and the casing wall A fluid discharge passage that communicates with the fluid discharge passage, and is annularly pressed downward by the flange portion of the movable passage member biased by the elastic member in the automatic opening and closing position into the annular groove of the operation member at the time of manual opening and closing 4. The fluid controller according to claim 3, wherein a seal member is interposed. A convex portion is formed on the upper end portion of the operating member during manual opening and closing, and a recess is formed in the lower end portion of the operating shaft fixed to the operation handle. A plurality of protrusions formed at predetermined intervals in the circumferential direction are formed at equal intervals on either one of the inner circumferences, and grooves at an integral multiple of the number of these protrusions are equally spaced on the other The fluid controller according to any one of claims 2 to 4, wherein A valve box provided with a fluid passage, a casing provided at the top of the valve box, a valve body that opens and closes the fluid passage, and a closed position that is moved downward to close the valve body and moved upward. A valve body presser that can be moved to an open position that opens the valve body, an elastic member that biases the valve body in either the closed position direction or the open position direction, and an automatic opening / closing means In a fluid controller having an automatic opening / closing operation member that moves a valve body presser against an urging force of an elastic member to an open position or a closed position, by being manually moved up and down and moved downward A manual opening / closing operation member that presses the valve body presser downward is further provided, and the manual opening / closing operation member includes a position where the lower end presses the center part of the top surface of the valve body presser and a valve body presser that cannot be automatically opened and closed. Center of top It is a rod-like body that can be moved by manual operation to a position where it can be opened and closed apart from the lower end.The automatic opening / closing operation member is fitted to the rod-shaped manual opening / closing operation member so that it can be moved up and down relatively and attached to the elastic member. It is a cylindrical body that is moved to a closed position in which the lower end presses the top surface peripheral edge of the valve body presser downward and an open position where the lower end is separated from the center part of the top surface of the valve body presser by automatic opening and closing means. A fluid controller characterized in that an emergency closing state in which the manual opening / closing operation member is moved to the closed position when the automatic opening / closing operation member is in the open position is possible . An upper guide portion and a lower guide portion defined by a counter plate are formed in the casing, and the automatic opening / closing operation member is guided by the upper piston portion guided by the upper guide portion and the lower guide portion. A lower piston portion, and a compressed air introduction chamber is formed between the counter plate and the upper piston portion of the automatic opening / closing operation member, and the manual opening / closing operation member includes an axial passage and an axial passage. The lower end radial passage that communicates with the compressed fluid introduction chamber through the radial through hole provided in the operation member at the time of automatic opening and closing in the radial direction, and the peripheral wall of the casing body extending in the radial direction from the middle portion of the axial passage The fluid controller according to claim 6, further comprising an intermediate radial passage that communicates with a compressed fluid introduction portion provided in the fluid passage. The lower end radial direction of the operating member at the time of manual opening / closing is determined by the gap in the inner periphery of the operating member at the time of automatic opening / closing, the second radial through hole formed in the operating member at the time of automatic opening / closing and the clearance at the outer periphery of the operating member at the time of automatic opening / closing. 8. The fluid controller according to claim 7, wherein the passage and the space below the lower piston portion of the operation member at the time of automatic opening and closing are communicated.

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