JPH06241330A - Fluid controller - Google Patents

Abstract

PURPOSE:To smoothly rotate a handle for manipulating a stem with a light force in a fluid controller for normally and reversely rotating the handle over a predetermined angle so as to open and close a fluid passage. CONSTITUTION:A handle 5 and a stem 4 are supported to a support member 3 planted on a body 1 having a fluid passage and the like, and a link mechanism 6 which is vertically extendable and retractable is located between the support member 3 and the stem 4 while a cam mechanism 8 for extending the link mechanism 6 so as to drive the stem 4 is located between the link mechanism 6 and the handle 5. Further, the cam mechanism 8 is composed of a roller support member 29 attached to the link mechanism 6, a roller 30 rotatably supported to the roller support member 29, a ring-like cam member 31 provided to the handle 5 and having a cam surface 31a on which the roller 30 rolls upon rotation of the handle 5 and the like, and the cam surface 31a is pressed against the roller 30 during rotation of the handle 5, so as to inward replace the roller support member 9 or the like, thereby the link mechanism 6 is extended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid controller mainly used in a fluid pipeline of a semiconductor manufacturing plant, a nuclear power plant, etc., and more particularly to a fluid controller by rotating a handle forward and backward by a constant angle. The present invention relates to a fluid controller that opens and closes a passage.

[0002]

2. Description of the Related Art Conventionally, a fluid controller having a structure shown in FIG. 5, for example, is known as a fluid controller which opens and closes a fluid passage by rotating a handle forward and backward by a predetermined angle, for example, 90 degrees. That is, the fluid controller includes a fluid inlet 40a, a fluid outlet 40b, a fluid passage 40c, a valve chamber 40d.
And a body 40 having a valve seat 40e and the like, a lower diaphragm 41 disposed at a lower position of the valve chamber 40d and abutting against the valve seat 40e, a lower bonnet 42 screwed to the lower part of the valve chamber 40d, Lower diaphragm edge retainer 4 provided between the lower diaphragm 41 and the lower bonnet 42
3, a pusher 44 slidably inserted in the lower bonnet 42 in a vertically slidable manner, an upper diaphragm 45 disposed at an upper position of the valve chamber 40d, a bonnet 46 screwed to the body 40, and an upper portion. An upper diaphragm edge retainer 47 interposed between the diaphragm 45 and the bonnet 46, a diaphragm retainer 48 vertically arranged on the upper surface side of the upper diaphragm 45, and a bonnet 46.
A stem 49 rotatably supported inside and immovable in the axial direction, a handle (not shown) attached to the upper end of the stem 49, and screwed to the upper end of the bonnet 46,
A disk-shaped retainer 50 that prevents the stem 49 from coming off,
The thrust washer 51 is provided between the stem 49 and the retainer 50, and is provided between the diaphragm retainer 48 and the stem 49. The rotation amount of the stem 49 is converted into a vertical movement amount and the diaphragm retainer 48 is moved. And a cam mechanism 52 for lowering.

The cam mechanism 52 is disposed between the stem 49 and the upper diaphragm edge retainer 47 so as to be vertically movable and non-rotatable, and has a plurality of hemispherical recesses 53a located on the same circumference on the upper surface. The formed thrust disk 53, the ball 54 rotatably fitted in each recess 53a of the thrust disk 53, and the bottom surface of the stem 49 are formed on the lower surface of the stem 49. The guide groove 49a is formed by two arc-shaped (1/4 circle) guide grooves 49a, etc., and the depth of each guide groove 49a is gradually deeper (or shallower) from one end to the other end of the groove. ) Is formed.

In FIG. 5, reference numeral 55 is a thrust disk.
It is planted on the bottom surface and slides on the upper diaphragm edge retainer 47.
The thrust disk 53 is freely movably inserted and can be raised and lowered and rotated.
Guide pin for non-rotatable support, 53b is a thrust circle
Arc-shaped (1/4 circle) rotation control formed on the upper surface of the plate 53
The limit groove, 56 is planted on the lower surface of the stem 49, and is a rotation limiting groove.
Rotation of handle and stem 49 by sliding movement within 53b
The rotation limit pin for regulating the angle (90 degrees in this example)
And 57 are the diaphragm retainer 48 and the thrust disc 53.
Cushion disc spring interposed between the two, 58 is a thrust disk
The diaphragm pusher supported by 53 is slidable in the vertical direction.
The retaining bolts on the E 48 and 40f detect fluid leakage.
For detecting, 59 is a tube stub, and 60 is a tube
It is a adapter.

In the fluid controller, when a handle (not shown) attached to the upper end of the stem 49 is operated to rotate the stem 49 forward and backward by 90 degrees, the ball 54 is recessed.
While rotating while being held by a, the guide groove 49a moves relatively along the guide groove 49a, and comes into contact with the guide groove 49a from a deep portion to a shallow portion or from a shallow portion to a deep portion. Then, when the ball 54 comes into contact with the shallow portion of the guide groove 49a, the ball 54 is displaced downward, the thrust disk 53 is pushed by the ball 54 and descends accordingly, and the diaphragm retainer 48 also moves. It is pushed downward via the spring 57 and descends. As a result, the diaphragm retainer 48
By the central part of the upper diaphragm 45, the pusher 4
4 and the central portion of the lower diaphragm 41 are sequentially pushed downward to descend, and the central portion of the lower diaphragm 41 is moved to the valve seat 40.
The fluid passage 40c is closed against the e. Further, when the ball 54 comes into contact with the deep portion of the guide groove 49a, the thrust disk 53 can be raised, so that the lower diaphragm 4 can be moved by the fluid pressure and the elastic force of the diaphragms 41 and 45.
1, the pusher 44, the upper diaphragm 45, the diaphragm retainer 48, the thrust disc 53, etc. are pushed upward and rise. As a result, the lower diaphragm 41 is attached to the valve seat 40.
The fluid passage 40c is opened by being separated from e. The above fluid controller has a diaphragm 41,
Since each of the valves 45 is arranged, it has an excellent practical effect such that the fluid can be surely prevented from leaking from the valve chamber 40d.

[0006]

However, in the above fluid controller, since the ball 54 is fitted and held in the hemispherical recess 53a formed in the thrust disk 53, the ball 54 is retained in the recess 53a. It is difficult to rotate, and the ball 54 may not rotate in the recess 53a when the handle and the stem 49 rotate, and may slide in the guide groove 49a formed in the stem 49 along the groove. Naturally, the stem 49 rotates while being pressed by the thrust washer 51 due to fluid pressure or the like and in surface contact with the thrust washer 51. As a result, the drive of the handle becomes extremely heavy when the handle rotates, and there is a problem that the handle cannot be rotated smoothly and smoothly. Further, since the guide groove 49a formed on the lower surface of the stem 49 is formed in an arc shape around the axis of the stem 49, and the guide groove 49a is inclined in the circumferential direction,
When the handle and the stem 49 are rotated in the valve closing direction, a force in the circumferential direction acts on the thrust disc 53, and the thrust disc 53 tries to rotate. However, the thrust disk 53
Since it is prevented from rotating by the guide pin 55, it will be pressed against the guide pin 55, and it will be difficult for it to slide smoothly in the vertical direction and smoothly. As a result, the drive of the steering wheel becomes even heavier.

The present invention was devised in order to solve the above problems, and an object thereof is to provide a fluid controller capable of smoothly and smoothly rotating a handle for operating a stem with a small driving force. To provide.

[0008]

In order to achieve the above object, a fluid controller according to the present invention is provided with a body having a fluid passage, a valve chamber, a valve seat, etc., and is vertically movable within the body.
A diaphragm or a disc that opens and closes a fluid passage by being seated on and off a valve seat, a support body that is erected on the body, and a stem that is supported by the support body so as to be vertically movable and non-rotatable and that can press the diaphragm or disc downward. A handle rotatably supported by a support so as not to move up and down, a link mechanism interposed between the support and the stem, and capable of expanding and contracting in the vertical direction; And a cam mechanism that is interposed between the handle and the link mechanism and that transmits the rotational movement of the handle to the link mechanism to extend the link mechanism. The cam mechanism is attached to the link mechanism, and is provided with a roller support that can always take a horizontal position, a roller that is horizontally rotatably supported by the roller support, and a handle that is provided to rotate the handle. Sometimes roller is constituted by an annular cam member having an inner peripheral surface which rolls, the inner peripheral surface of said cam member,
When the handle is rotated, the roller is pressed to displace the roller and the roller support member inward, and the cam mechanism extends the link mechanism.

[0009]

When the handle is rotated by a predetermined angle and the roller is pressed inward by the cam surface of the cam body, the roller moves inward while rotating, and the roller support also moves inward, thereby forming a link mechanism. To extend. When the link mechanism extends, the stem descends against the urging force of the elastic body and pushes down the diaphragm or disk. As a result, the diaphragm or disc rests on the valve seat and closes the fluid passage. When the handle is rotated in the opposite direction from the above state by a predetermined angle, the stem is lifted by the urging force of the elastic body to shorten the link mechanism, and the roller and the roller support are moved outward. When the stem rises, the diaphragm or disc is pushed upward by fluid pressure or the like. As a result, the diaphragm or disc separates from the valve seat and the fluid passage is opened. In the fluid controller of the present invention, when the handle is rotated, the roller is pressed by the cam body provided on the handle while rotating the roller, the roller and the roller support are displaced, the link mechanism is extended, and the stem is driven. Therefore, the link mechanism functions as a booster, and the stem can be driven with a small force. That is, the force for displacing the roller and the roller support is small, and as a result, the handle for operating the stem can be rotated with a small driving force. However, since the roller rolls on the cam surface of the cam body when the handle rotates, the contact resistance between the cam body and the roller decreases, and the handle can rotate more smoothly and smoothly.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a partial vertical cross-sectional view showing a valve opening state of a diaphragm type fluid controller according to an embodiment of the present invention. The diaphragms are arranged at respective positions, and the lower diaphragms are directly seated on and off the valve seat to open and close the fluid passage. 1 is a body, 2 is an upper diaphragm, 3 is a support, 4 Is a stem, 5 is a handle, 6 is a link mechanism, 7 is an elastic body, and 8 is a cam mechanism.

The body 1 is made of a metal material such as stainless steel and has the same structure as a conventionally known one. Inside, a fluid inlet, a fluid outlet, a fluid passage, a valve seat (all not shown) and a valve chamber are provided. 1a are formed respectively. Also, the valve chamber 1a
An annular step 1b is formed on the upper portion of the inner peripheral surface of the.

The upper diaphragm 2 is formed of a thin plate made of a metal such as stainless steel, Inconel (trademark), shape memory alloy, etc., and has a central portion bulged upward to form a dish.
The peripheral portion thereof is placed on the step portion 1b of the valve chamber 1a.
The peripheral portion of the upper diaphragm 2 has a substantially cylindrical upper diaphragm edge retainer 9 and the body 1 which are inserted into the valve chamber 1a.
With the cylindrical edge pressing screw 10 screwed to the
It is pressed to the b side and is sandwiched and fixed in an airtight state. The upper diaphragm 2 maintains the airtightness of the valve chamber 1a, and the central portion of the upper diaphragm 2 moves up and down so that the pusher 11 and the lower diaphragm (not shown) arranged below can move up and down.

The support 3 is made of a metal material such as stainless steel, is erected on the upper surface of the body 1, and supports a stem 4 and a handle 5 which will be described later. In the present embodiment, the support 3 is disposed on the upper surface of the body 1 so as to face each other, and is located above the upper diaphragm 3 and a pair of legs 3A fixed to the body 1 via leg fixing bolts 12, and the leg 3A. And a support member 3B fixed to the upper end of the via a fixing bolt 13. Also, the supporting member 3B
A rotation limiting pin 14 that limits the rotation angle (90 degrees in this embodiment) of the handle 5 is planted upward.

The stem 4 is made of a metal material such as stainless steel, is supported by the support member 3B so as to be vertically movable and non-rotatable, and can press the diaphragm or disk downward. In this embodiment, the stem 4 is provided with a shaft portion 4a slidably inserted in and supported by the support member 3B in the vertical direction, a plate portion 4b connected to the lower end of the shaft portion 4a, and a plate portion 4b. The disc mechanism 4c is formed into a circular shape and is prevented from rotating by a link mechanism 6 provided between the plate portion 4b and the support member 3B. A gate-shaped fixture 15 is slidably supported in the vertical direction on the shaft portion 4a of the stem 4,
Guide rods 16 are horizontally attached and fixed to both ends of the fixture 15. Further, a disc spring holder 17 is fixed to the lower surface of the disc portion 4c of the stem 4 by a fixing bolt 18, and the disc spring holder 17 is slidably inserted in the upper diaphragm edge retainer 9 in the vertical direction. Incidentally, 19 is a diaphragm retainer that is slidably inserted in the center of the disc spring holder 17 in the vertical direction and abuts against the center of the upper diaphragm 2, and 20 is interposed between the disc spring holder 17 and the diaphragm retainer 19. The mounted shock-absorbing coned disc spring 21 is a disc spring preset bolt screwed to the diaphragm retainer 19.

The handle 5 is formed of a metal material such as stainless steel into a substantially bowl shape, and is supported by the middle portion of the support member 3B so as to be slidably rotatable and non-elevable. Further, an arc-shaped (1/4 circle) rotation limiting groove 5a into which the rotation limiting pin 14 is slidably inserted is formed in the lower surface of the upper wall portion of the handle 5. Incidentally, 22 is a handle retaining cap screwed to the upper end of the support member 3B and 23 is the support member 3B.
A handle gripping ring fitted on the upper end of B is a gripping ring rotation preventing key 24.

The link mechanism 6 includes a support member 3B and a stem 4
It is interposed between the plate portion 4b and the plate portion 4b, and can be expanded and contracted in the vertical direction. In the present embodiment, the link mechanism 6 has a pair of upper links 6a whose upper end is formed into a bifurcated shape and whose upper end is rotatably connected to the lower end of the support member 3B via the upper link pin 25. , Both ends are formed in a bifurcated shape, the upper end side is rotatably connected to the lower end part of the upper link 6a via an intermediate link pin 26, and the lower end part side is a lower link pin 27 to the plate part 4b of the stem 4. It is composed of a pair of lower links 6b rotatably connected to each other via.

The elastic body 7 is interposed between the support member 3B and the spring holding bolt 28 screwed to the upper end portion of the stem 4, holds the stem 4 and the like upward and holds the link mechanism 6 together. Is held in a bent state (the state where the intermediate link pin 26 is displaced outward from the upper and lower link pins 25, 27). Further, the stem 4 and the diaphragm retainer 19 and the like are raised by the urging force of the elastic body 7, and the fluid passage is opened. In this embodiment, a coil spring is used for the elastic body 7.

The cam mechanism 8 includes a handle 5 and a link mechanism 6.
And a pair of roller support members 29 attached to the link mechanism 6 so as to extend so as to extend the link mechanism 6 by transmitting the rotational movement of the handle 5 to the link mechanism 6. A roller 30 rotatably supported by each roller support body 29 and a cam body 31 attached to the handle 5. Specifically, each roller support 29 is rotatably attached to the intermediate link pin 26 of the link mechanism 6, and the horizontal guide bar 16 is provided.
Is slidably inserted and supported in the axial direction. As a result, the roller support 29 slides along the guide rod 16 as the link mechanism 6 extends, and always takes a horizontal posture. When the link mechanism 6 extends, the fixing tool 15 and the guide rod 16 move up and down along the stem 4, so that the roller support 29 slides smoothly and smoothly along the guide rod 16. . Laura 3
No. 0 is formed of a metal material such as stainless steel so that the outer peripheral surface is spherical, and is horizontally rotatably supported by each roller support 29 via roller pins 32.
The cam body 31 is formed of a metal material such as stainless steel in an annular shape, is fixed to the inner peripheral surface of the lower end portion of the handle 5 via a cam fixing bolt 33, and when the handle 5 rotates, the inner peripheral surface thereof is always attached to the roller 30. It abuts and rotates the roller 30. Further, the inner peripheral surface of the cam body 31 serves as a cam surface 31a that presses the roller 30 when the handle 5 rotates to displace the roller 30 and the roller support body 29 inward (toward the stem 4). In the example, the cam surface 31a has a substantially elliptical shape in a plan view. The cam surface 31
The shape of a is such that, when the long diameter portion of the shape a comes into contact with the roller 30, the roller 30 and the roller support body 29 are displaced outward, the link mechanism 6 is shortened, and the stem 4 and the like are opened to the valve opening position (fluid passage So that the
Further, when the short diameter portion contacts the roller 30, the roller 30 and the roller support body 29 are displaced inward, the link mechanism 6 is in an extended state, and the stem 4 and the like are in the valve closed position (the fluid passage is closed). It is set so that it can descend to each position).

Next, the operation of the fluid controller will be described. In the fluid controller, when the roller 30 is in contact with the long diameter portion of the cam surface 31a, the stem 4 and the like are lifted by the urging force of the elastic body 7 and the link mechanism 6 is in a bent state. The roller 30 and the roller support body 29 are displaced outward. As a result, the valve is in the open state (see FIG. 1) with the fluid passage opened. Further, when the roller 30 is in contact with the short diameter portion of the cam surface 31a, the roller 30 and the roller support body 29 are displaced inward,
The link mechanism 6 is in an extended state and the stem 4
Etc. are falling. As a result, the fluid passage is closed and the valve is closed (see FIG. 4). Thus, when the fluid controller is changed from the valve open state to the valve closed state, the cam surface 31a
The handle 5 is rotated by 90 degrees in a predetermined direction (clockwise direction in FIG. 3 in this embodiment) so that the roller 30 comes into contact with the short diameter part of the. Then, the cam body 31 rotates the roller 30, and the short-diameter portion side of the cam surface 31a moves toward the roller 30.
Contact one after another. When the roller 30 abuts on the short diameter side of the cam surface 31a, the roller 30 is contacted by the cam surface 31a.
Is pushed inward (stem 4 side) while rotating. Along with this, the roller support 29 slides inward along the guide rod 16 and extends the link mechanism 6. At this time, since the fixing tool 15 and the guide rod 16 slide downward along the stem 4, the roller support 29 slides inward along the guide rod 16 in a horizontal posture. When the link mechanism 6 extends, the stem 4 descends against the biasing force of the elastic body 7, the disc spring holder 17 and the diaphragm retainer 19 also descend, and the central portion of the upper diaphragm 2, the pusher 11 and the lower diaphragm. Push down the central part of the. Then, as shown in FIG. 4, when the roller 30 comes into contact with the short diameter portion of the cam surface 31a, the rotation amount of the handle 5 is regulated by the rotation limiting pin 14 and the rotation limiting groove 5a, and the roller support body 29 moves inside. And the link mechanism 6 is in the most extended state, the stem 4
And diaphragm retainer 19 etc. are at the lowest position (valve closing position)
It will be in a state of descending to. As a result, the central portion of the lower diaphragm rests on the valve seat, completely closing the fluid passage. On the other hand, when the fluid controller is changed from the valve closed state to the valve opened state, the handle 5 is moved in the opposite direction (counterclockwise direction in FIG. 3) so that the roller 30 contacts the long diameter portion of the cam surface 31a. Rotate 90 degrees. Then, the cam body 31 rotates the roller 30, and the long diameter side of the cam surface 31a sequentially contacts the roller 30. Cam surface 31
When the roller 30 comes into contact with the long diameter side of a, the elastic body 7
The stem 4 and the diaphragm retainer 19 and the like are lifted by the biasing force of the above and the recovery force of the diaphragm, and the link mechanism 6 is shortened to displace the roller support 29 and the roller 30 outward. Along with this, the lower diaphragm,
The pusher 11, the upper diaphragm 3, etc. are pushed upward by fluid pressure or the like. Then, as shown in FIGS. 1 and 3, when the roller 30 comes into contact with the long diameter portion of the cam surface 31a, the rotation limiting pin 14 and the rotation limiting groove 5a regulate the rotation amount of the handle 5 and the roller support 29.
Is largely displaced outward, the link mechanism 6 is in the shortest state, and the stem 4, the diaphragm retainer 19 and the like are raised to the uppermost position (valve opening position). As a result, the lower diaphragm is completely separated from the valve seat and the fluid passage is opened.

In this fluid controller, when the handle 5 is rotated, the roller body 30 is rotated and pressed by the cam body 31 provided on the handle body 5 to displace the roller 30 and the roller support body 29 inwardly to move the link mechanism 6. Since the stem 4 is extended and driven in the vertical direction, the link mechanism 6 serves as a booster, and the stem 4 can be driven with a small force. That is, the force for displacing the roller 30 and the roller support 29 is small, and as a result, the handle 5 for operating the stem can be rotated with a small driving force.
However, since the outer peripheral surface of the roller 30 is formed in a spherical shape and the roller 30 rolls on the cam surface 31a, the contact resistance between the cam surface 31a and the roller 30 becomes extremely small, and the rotation of the handle 5 is further enhanced. You can do it smoothly and smoothly,
The roller 30 also rolls on the cam surface 31a smoothly and smoothly.

In the above embodiment, the support 3 is connected to the leg 3A.
However, in another embodiment, the leg 3A and the support member 3B may be integrally formed and may be erected on the body 1.

In the above embodiment, the handle 5 is set to 90.
Although the fluid passage is opened and closed by rotating the fluid in the normal and reverse directions, in another embodiment, the shape of the cam surface 31a may be changed to open and close at a different rotation angle.

In the above embodiment, the cam surface 31a of the cam body 31 has a substantially elliptical shape in plan view.
The shape of 1a is not limited to that of the above embodiment, and any shape can be used as long as the roller 30 can be pressed and moved inward when the handle 5 is rotated.

In the above embodiment, the handle 5 and the cam body 31 are formed separately, and the cam body 31 is fixed to the handle 5. However, in other embodiments, the handle 5 is used. The cam body 31 and the cam body 31 may be integrally formed.

In the above embodiment, the elastic body 7 is interposed between the stem 4 and the support member 3B to urge and hold the stem 4 upward. The present invention is not limited to the above embodiment, but may be any position as long as the stem 4 can be urged and held upward.

In the above embodiment, the upper and lower diaphragms are arranged in the valve chamber 1a, respectively, and the lower diaphragm is seated on and off the valve seat. However, in other embodiments, It is also possible to dispose only one diaphragm in the valve chamber 1a and allow it to be seated on the valve seat.

In the above embodiment, the diaphragm is directly seated against the valve seat, but in another embodiment, the disk is arranged below the diaphragm and the disk is lowered by descending the diaphragm. The disc may be pushed to and released from the valve seat, or the diaphragm may be omitted and the disc may be arranged in the valve chamber 1a to be pushed to and released from the valve seat. .

[0028]

As described above, in the fluid controller of the present invention, the link mechanism which can be expanded and contracted in the vertical direction is provided between the stem and the support for supporting the stem, and the link mechanism and the support are provided. A cam mechanism for driving the stem by extending the link mechanism with the supported handle is interposed, and the cam mechanism is rotatably supported by the roller support attached to the link mechanism and the roller support. And a ring-shaped cam body provided on the handle and having a cam surface that presses the roller while rotating the handle, the roller is rotated by the cam body when the handle is rotated in a predetermined direction. Is rotated and pressed, the roller and the roller support are displaced inward, the link mechanism extends, and the stem drives downward. That is,
In the fluid controller of the present invention, the link mechanism interposed between the stem and the support functions as a booster, and the stem can be driven with a small force. As a result, the force for displacing the roller and the roller support is small, and the handle can be rotated with an extremely small force as compared with the conventional fluid controller using the ball, the hemispherical recess and the arc-shaped guide groove. It can be operated. Further, since the roller rolls on the cam surface of the cam body when the handle rotates, the contact resistance between the cam body and the roller decreases, and the handle can rotate more smoothly and smoothly.

[Brief description of drawings]

FIG. 1 is a partially omitted vertical sectional view showing a valve open state of a diaphragm type fluid controller according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a partially omitted vertical sectional view showing a valve closed state of the fluid controller.

FIG. 5 is a vertical cross-sectional view showing a valve open state of a conventional fluid controller.

[Explanation of symbols]

1 is a body, 1a is a valve chamber, 2 is an upper diaphragm, 3 is a support, 4 is a stem, 5 is a handle, 6 is a link mechanism,
7 is an elastic body, 8 is a cam mechanism, 29 is a roller support, 30
Is a roller, 31 is a cam body, and 31a is a cam surface.

Front Page Continuation (72) Inventor Yoshiaki Chikaike 2-3-2 Selling Moat, Nishi-ku, Osaka City, Osaka Prefecture (72) Inventor Kazuhiro Yoshikawa 2-3-2 Selling Moat, Nishi-ku, Osaka City, Osaka Prefecture

Claims (1)

[Claims] 1. A body having a fluid passage, a valve chamber, a valve seat, and the like, a diaphragm or disk that is vertically movably disposed in the body, and opens and closes the fluid passage by contacting with the valve seat. An upright support, a stem supported by the support so as to be vertically movable and non-rotatably supported and capable of pressing a diaphragm or a disk downward, a handle supported by the support so as to be rotatable and non-rotatably supported, A vertically extending link mechanism that is interposed between the stem and the elastic body, an elastic body that biases the stem upward to hold the link mechanism in a bent state, and an intervening body between the handle and the link mechanism. Is
A roller mechanism for transmitting the rotational movement of the handle to the link mechanism to extend the link mechanism, wherein the cam mechanism is attached to the link mechanism and can take a horizontal position at all times; A roller that is horizontally rotatably supported by a support body, and an annular cam body that is provided on the handle and has an inner circumferential surface on which the roller rolls when the handle rotates, the inner circumferential surface of the cam body being A fluid controller characterized by being a cam surface for pressing the roller when the handle rotates to displace the roller and the roller support member inward to extend the link mechanism.