JP2009068665A - Fluid controlling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid controlling device having an improved misoperation preventing function and further, having more advantages of reducing the installation space when setting a plurality of fluid controlling devices. <P>SOLUTION: The fluid controlling device 1 can close a flow passage in a valve main body as a lever 13 protruded above a casing 3 is brought into a first inclined state and open the flow passage as the lever 13 is brought into a second inclined state. A misoperation preventing fixture 51 comprises a cylindrical part 52 detachably fixed to the upper end part of the casing 3, a raised part 53 provided on the top face of the cylindrical part 52, and a top part 54 provided on the upper end part of the raised part 53 to cover the lever 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fluid controller, and more particularly to a fluid controller that manually operates a lever to open and close the fluid passage.

As a fluid controller, Patent Document 1 discloses that a lever projecting upward from a casing is in a first inclined state to close a valve body fluid passage, and a second inclined state is in a valve body fluid. A passage device can be opened, and a locking device is provided on the lever and locks the valve stem in either the fluid passage closed state in the lower position or the fluid passage open state in the upper position. Are disclosed.
JP 2004-169810 A

  Since the fluid controller of Patent Document 1 does not need to swing the lever to a horizontal state as compared with the conventional toggle valve, the installation space for installing a plurality of levers can be reduced compared to the conventional one. And also has a function of preventing malfunction by locking the valve stem in either the fluid passage closed state at the lower position or the fluid passage open state at the upper position. However, operation is possible by moving the lock / unlock operation knob, and the lever protrudes above the fluid controller, so it may move when the operator hits it, preventing misoperation. In terms of it was not perfect.

  An object of the present invention is to provide a fluid controller that has an advantage that an installation space can be reduced when a plurality of installations are installed, and that has an improved function of preventing erroneous operation.

  The fluid controller according to the present invention closes the fluid passage in the valve body by setting the operating member protruding upward from the casing to the first inclined state, and closes the fluid passage in the valve body by setting the second inclined state. The fluid controller that can be opened further includes a misoperation prevention jig, and the misoperation prevention jig is provided on a cylindrical portion that is detachably attached to an upper end portion of the casing, and is provided on an upper surface of the cylindrical portion. And a top portion provided at an upper end portion of the rising portion and covering the operation member.

  The configuration of the valve body of the fluid controller, the configuration of the casing, the internal configuration of the valve rod, the valve body, etc. are not particularly limited.

  The top and bottom are for convenience, and the fluid controller may be installed vertically or horizontally, or upside down.

  The fluid controller includes, for example, a valve box provided with a fluid passage, a cylindrical casing provided at the upper part of the valve box, a vertically movable part provided in the casing, and an upper end protruding above the casing. A valve body, a valve body that is provided at the lower end of the valve stem and communicates or blocks the fluid passage as the valve stem moves up and down, an elastic member that biases the valve stem downward, and an upper end of the valve stem are penetrated A horizontal axis, and a lever having a tip portion through which the horizontal axis passes and swinging about the axis of the horizontal axis, the horizontal axis being relatively above and opening the flow path It is assumed that the lever can be switched between the first inclined state and the second inclined state in which the horizontal axis is relatively below and the flow path is closed.

  In such a fluid controller, the lever can be moved between the first inclined state and the second inclined state by swinging the lever by hand, and the horizontal axis moves up and down accordingly. As a result, the valve stem can be moved up and down to open and close the fluid passage. Therefore, since it is not necessary to swing the lever to the horizontal state, the installation space when installing a plurality of levers can be reduced.

  The erroneous operation prevention jig is, for example, an integrally molded product made of synthetic resin, and is detachably attached to the casing by, for example, a screw. In order to detachably attach the erroneous operation preventing jig to the casing, the cylindrical portion provided on the erroneous operation preventing jig may be fitted to the cylindrical surface of the casing.

  It is preferable that a lock device for locking the operation member in at least one of the fluid passage closed state and the fluid passage open state is further provided, and that a double safety mechanism against erroneous operation is configured by the erroneous operation prevention jig and the lock device. .

  The locking device has, for example, a stopper supported by the lever so as to be movable in the axial direction of the lever as the operation member and biased toward the lower end of the lever, and the lever is in a first inclined state on the upper surface of the lever guide member. A fluid passage closed state locking recess that engages with the stopper at one time and a fluid passage open state locking recess that engages with the stopper when the lever is in the second inclined state, The rod is locked in the fluid passage open state in the upper position and in the fluid passage closed state in the lower position. In this case, the valve rod is locked in the fluid passage closed state or the fluid passage open state by engaging the stopper with the fluid passage closed state locking recess or the fluid passage open state locking recess of the lever guide member. In addition, the locked state can be released by moving the stopper against the urging force. Thus, the valve rod (lever) can be locked and unlocked in the fluid passage closed state and the fluid passage open state by a very simple operation.

  According to the erroneous operation preventing jig, since the operation member can be covered, an erroneous operation preventing function can be exhibited even when there is no locking device. And a double safety mechanism is comprised by combining an operation error prevention jig and a lock device which has an operation error prevention function, and can obtain high reliability to operation error.

  According to the fluid controller of the present invention, since the operation member is covered with the erroneous operation preventing jig, the operation becomes impossible, and the reliability of the erroneous operation prevention can be greatly enhanced.

  Embodiments of the present invention will be described below with reference to the drawings. In this specification, the top / bottom / left / right refers to the top / bottom / left / right of FIG.

  As shown in FIGS. 1 and 2, the fluid controller (1) includes a valve body (2) having a fluid passage (not shown) and a cylindrical casing placed over the valve body (2). (3), a lever (13) and a lock / unlock operation knob (31) as operation members protruding upward from the casing (3), and an erroneous operation prevention jig (51) placed on the casing (3). It has.

  In this fluid controller (1), the lever (13) is in the first inclined state shown in FIGS. 1 (a) and 2 (a), thereby closing the fluid passage in the valve body (2). The fluid passage in the valve body (2) can be opened by setting the lever (13) to the second inclined state shown in (b) of FIG. 1 and (b) of FIG. Further, the lock / unlock operation knob (31) can be locked in the fluid passage closed state or the fluid passage open state by raising and lowering and rotating.

  According to this fluid controller (1), the space required to swing the lever (13) for opening and closing operation does not protrude to the left and right of the valve body (2). It is possible to reduce the installation space in the case of installing a plurality of components, and it is possible to very easily perform the operation of locking in the fluid passage closed state or the fluid passage open state.

  The erroneous operation preventing jig (51) is made of synthetic resin and has an L shape when viewed from the front, and includes a cylindrical portion (52) fitted to the outer periphery of the upper end portion of the casing (3), and a cylindrical portion ( 52) a rising portion (53) extending upward from the upper surface, and a top portion (54) provided at the upper end portion of the rising portion (53) and covering the lever (13) and the lock / unlock operation knob (31). .

  The cylindrical portion (52) is detachably attached to the casing (3) with a screw. The rising portion (53) has a shape in which a hollow portion (55) having a horizontal cross section is formed in a columnar body whose horizontal cross section is a part of a circle. The cavity (55) is for accommodating the lever (13) and the lock / unlock operation knob (31), and the height of the cavity (55) is set lower than the height of the rising part (53). Thus, a top portion (54) capable of covering the lever (13) and the lock / unlock operation knob (31) is formed at the upper end portion of the rising portion (53).

  As shown in FIG. 2, the lock / unlock operation knob (31) provided at the upper end of the lever (13) is covered with the top (54) of the erroneous operation prevention jig (51) to prevent erroneous operation. A slight gap exists between the top (54) of the jig (51) and the lock / unlock operation knob (31). This gap prevents interference with the lock / unlock operation knob (31) even if the vertical position of the misoperation prevention jig (51) is slightly moved, and lock / unlock operation is performed by inserting a finger into this gap. The knob (31) cannot be moved upward.

  In this fluid controller (1), in order to prevent erroneous operation when the fluid passage in the valve body (2) is closed, as shown in FIG. 1 (a) and FIG. The jig (51) only needs to be fixed to the casing (3), and the lock / unlock operation knob (31) cannot be gripped with a finger, and erroneous operation is reliably prevented. Further, in order to prevent an erroneous operation when the fluid passage in the valve body (2) is open, as shown in FIGS. 1 (b) and 2 (b), an erroneous operation preventing jig (51) is attached to the casing. The lock / unlock operation knob (31) cannot be grasped with a finger, and erroneous operation is reliably prevented.

  The internal configuration of the fluid controller (1) is not particularly limited, but a preferred example is shown in FIG.

  In FIG. 5, the fluid controller (1) includes a valve body (2) provided with a fluid inlet passage (2a) facing downward to the left and a fluid outlet passage (2b) facing downward to the right, and the valve body (2) projecting upward. A cylindrical casing (3) in which a male screw portion at the lower end is screwed to a cylindrical female screw portion provided in a cylindrical shape, and a vertically movable portion provided in the casing (3) and the upper end (5a) is a casing (3) A valve stem (5) protruding upward, and a diaphragm whose periphery is fixed to the valve body (2) and opens and closes the fluid inlet passage (2a) as the valve stem (5) moves up and down (Valve) (6), disc-shaped diaphragm retainer (7) provided at the lower end of the valve stem (5) to push the diaphragm (6) downward, and the peripheral edge of the upward opening of the fluid inlet passage (2a) An annular valve seat (8) that is provided on the center of the diaphragm (6) and an outward flange portion that is housed in the casing (3) and is provided near the lower end of the valve stem (5) ( Five b) and a compression coil spring (9) which is received by an annular step (3a) provided in the middle of the casing (3) and biases the valve stem (5) downward, and an upper end of the casing (3) The lever receiver (10) attached to the part, the cover (11) covering the lever receiver (10), and the upper end (5a) of the valve stem (5) pass through and move up and down together with the valve stem (5). A horizontal shaft (12), a horizontal shaft driving lever (13) having a tip portion through which the horizontal shaft (12) is passed and swinging about the axis of the horizontal shaft (12), and a lever receiver ( 10) Lever guide member (14) disposed on the upper surface, and provided on the lever (13) with the valve stem (5) in either the fluid passage closed state in the lower position or the fluid passage open state in the upper position And a locking device (15) for locking in the state.

  The lever receiver (10) includes a perforated disc portion (16) through which the valve stem upper end portion (5a) is inserted, and a cylindrical downward projecting portion (17) provided on the lower surface of the disc portion (16), It consists of a cylindrical upward projecting part (18) provided on the upper surface of the disk part (16). Then, the lower projecting portion (18) is fitted to the upper end portion of the casing (3) having a small diameter, and the casing (3) is fixed by a horizontal set screw (19) screwed through the same portion (18). ) It is attached to the upper end.

  The cover (11) is formed in a cylindrical shape having a top wall (11a), and is fitted over the lever receiver (10) from above.

  Two lever receiving contact surfaces (13a) and (13b) having different distances from the axis of the horizontal shaft (12) are provided on the tip surface of the lever (13).

  The lever guide member (14) is formed in a hemispherical shape with a flat bottom surface, and its upper end portion is exposed upward from the top wall (11a) of the cover (11). The top wall (11a) of the cover (11) is provided with a hole having a circular cross section that prevents the lever guide member (14) from coming off upward. The lever guide member (14) is provided with a through hole (20) that penetrates the member (14) in the vertical direction and in which the lower end of the lever (13) is movably accommodated. The upper end portion of the through hole (20) is formed in an inclined shape extending outward in the left-right direction, and the left inclined surface of the through hole (20) has a lever (13) swung in the flow path closing direction. A first stopper surface (21) that stops in the inclined state of 1 and a right inclined surface that faces the first stopper surface (21) is a second lever (13) that is swung in the flow path opening direction. The second stopper surface (22) is stopped in the inclined state. The first and second stopper surfaces (21) and (22) are inclined, for example, by about 20 ° from the vertical. The angle formed by the stopper surfaces (21) and (22) is preferably 90 ° or less, for example, 40 ° to 70 °. Accordingly, the lever receiving contact surface centered on the axis of the horizontal axis (12). The angle formed between (13a) and (13b) is also 90 ° or less, for example, 40 ° to 70 °.

  In the closed state of the flow path shown in FIG. 5, the lever (13) is stopped by hitting the left first stopper surface (21). When the lever (13) is swung from this state and the lever (13) is brought into contact with the second stopper surface (22) on the right side and stopped, a channel open state is obtained. The distance between the lever receiving surface (13a) of the lever (13) stopped in the second inclined state and the axis of the horizontal axis (12) is the lever (13) stopped in the first inclined state. The lever receiving abutment surface (13b) and the axis of the horizontal shaft (12) are larger than the distance between the horizontal shaft (12) and the horizontal shaft (12). A channel closed state positioned below and a channel open state where the horizontal shaft (12) and thus the valve stem (5) are positioned above are obtained.

  The locking device (15) includes a stopper (27) supported by the lever (13) so as to be movable in the axial direction of the lever (13), and a stopper urging compression coil that urges the stopper (27) toward the lower end of the lever. A spring (28), a pair of left and right stopper locking recesses (29) (30), which are provided on the upper surface of the lever receiving member (14) and into which the tip (27a) of the stopper (27) is fitted, and a stopper ( 27) and a block-like lock / unlock operation knob (31) provided at the upper end.

  The lever (13) is provided with a stopper guide groove (32) having a circular cross section extending in the longitudinal direction.The stopper (27) is slidable in the stopper guide groove (32) and the stopper (27). It is inserted so as to be rotatable around the axis of. The upper end of the stopper (27) and the operation knob (31) are joined together, and by holding the operation knob (31) by hand and pulling it up against the urging force of the compression coil spring (28), the stopper (27 ) Can be moved upward along its axial direction, and the operation knob (27) when the tip (27a) of the stopper (27) is not fitted in the stopper locking recess (29) (30) ( By rotating 31), the stopper (27) can be rotated about its axis. Then, by pulling up the operation knob (31) from the state shown in the figure and rotating it by 90 °, the tip end portion (27a) of the stopper (27) is detached from the stopper lock recesses (29) and (30). Has been made. In the closed state shown in FIG. 5, the tip (27a) of the stopper (27) is fitted in the left recess (recess for locking the fluid passage closed state) (29). In the open state, The distal end of the stopper (27) is fitted into the right recess (fluid channel open state locking recess) (30).

  According to the fluid controller (1) shown in FIG. 5, the built-in structure has a locking device (15) for preventing erroneous operation, and an erroneous operation preventing jig (to be attached later) ( By adding 51), a double safety mechanism is constructed to prevent erroneous operation, and it becomes extremely reliable.

  The fluid controller (1) in FIG. 5 is suitable for connecting a block-shaped passage forming member below the fluid controller (1), and the configuration of the valve body and casing of the fluid controller is limited to this. For example, the casing (3) and the valve body (2) can be integrally formed. As for the internal configuration, for example, the valve body (6) of the fluid controller (1) is not limited to the diaphragm, and the lever receiver can be omitted with the top wall of the casing as the lever receiver. is there. Then, by operating the lever (13), the valve stem (5) is moved up and down to open and close the fluid passage, and the lever (13) in the fluid passage closed state at the lower position and the fluid passage open state at the upper position, respectively. If the fluid controller is locked, the toggle type opening / closing mechanism and the locking device (15) can be provided, and the erroneous operation preventing jig (41) and the erroneous operation preventing cover (42) can be attached.

It is the front view which notched one part which shows one Embodiment of the fluid controller by this invention. It is a top view which shows one Embodiment of the fluid controller by this invention. It is a perspective view which shows a misoperation prevention jig | tool. It is the same vertical sectional view. It is a vertical sectional view showing an example of the internal structure of the fluid controller according to the present invention.

Explanation of symbols

(1) Fluid controller
(3) Casing
(13) Lever (operating member)
(15) Locking device
(31) Lock / unlock operation knob (operation member)
(51) Misoperation prevention jig
(52) Cylindrical part
(53) Rise
(54) Top

Claims (2)

Fluid control capable of opening the fluid passage in the valve body by closing the operation member protruding upward from the casing in the first inclined state and opening the fluid passage in the valve body by setting the second inclined state. The instrument further comprises a misoperation prevention jig, the misoperation prevention jig comprising a cylindrical portion that is detachably attached to the upper end of the casing, a rising portion provided on the upper surface of the cylindrical portion, and a rising portion A fluid controller comprising: a top portion provided at an upper end portion and covering an operation member. It further includes a lock device that locks the operation member in at least one of the fluid passage closed state and the fluid passage open state, and a double safety mechanism against erroneous operation is configured by the erroneous operation prevention jig and the lock device. The fluid controller of claim 1.

Images