JPH04327082A - Automatic lock handle in fluid control valve - Google Patents

Abstract

PURPOSE:To dispense with a regulating tool fgor spring force regulation by pressing a pressing body in coiling direction in the state making contact with the hook of a lock spring by the rotation of a handle to make the lock spring into freely rotatable state, and spirally advancing a regulating screw by its rotation. CONSTITUTION:In a fluid control valve in which a regulating spring 12 for repelling a diaphragm valve 11 downward is disposed in a cap body 3, when a regulating screw 17 is vertically spirally moved to regulate the repelling force of the regulating spring 12, a handle 25 is rotated, and a second pressing body 28 provided on the inner circumferential surface of a handle body 26 is brought into contact with hooks 15, 15a on both ends of a lock spring 16, and pressed in coiling direction. The hooks 15, 15a are pressed in the coiling direction, whereby the bonding frictional force of the lock spring 16 is released and laid in freely rotatable state. The first pressing body 24 of a lock body 19 jis pressed in the same direction by the hooks 15, 15a, whereby a regulating screw 17 is rotated in the same direction and vertically spirally moved.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic locking handle for a fluid control valve, which improves the operability of screw-type handles, which are often used to adjust the pressure, flow rate, direction, etc. of fluid.

0002

2. Description of the Related Art Conventionally, this type of fluid control valve has been known as a pressure regulating valve a shown in FIG. 11 and a flow regulating valve b shown in FIG. The pressure is adjusted by rotating the handle c of the formula and adjusting the elastic force of the adjustment spring d depending on the amount of screwing. The degree of opening of the valve port f is adjusted by the amount of screw movement.

However, in order to prevent the screws from loosening, both the pressure regulating valve a and the flow regulating valve b are secured with lock nuts g, so in order to rotate the handle c and the needle valve e, a lock nut is required. It is necessary to loosen the g and tighten it after adjustment, resulting in very poor workability, and it also has the drawback of being difficult to adjust in a narrow space.

0004

[Problems to be Solved by the Invention] The present invention eliminates the need for lock nuts to prevent loosening, eliminates the need for any adjustment tools, improves work efficiency, and provides fluid control that prevents adjustment screws from breaking or coming off. It is intended to provide an automatic locking handle on the valve.

[0005]

[Means for Solving the Problem] In view of the problems such as workability and difficulty of adjustment based on the above-mentioned prior art, the present invention utilizes the frictional force when the diameter of a coil spring is contracted and expanded, and provides an adjustment screw equivalent to the adjustment screw. A fluid control valve whose main purpose is to eliminate the transmission of rotational force from a driven member that rotates and moves up and down to a rotatable main member corresponding to a handle, and to transmit rotational force from the main member to a driven member. The object of the present invention is to provide an automatic locking handle in order to overcome the above-mentioned drawbacks.

[0006] The automatic lock handle for a fluid control valve is a neck diameter portion of the valve body into which an adjustment screw is screwed in a fluid control valve that controls the pressure, flow rate, direction, etc. of fluid by the vertical movement of an adjustment screw. A lock spring having hooks at both ends is attached by friction force to the outer circumferential surface of the lock spring, and a first pressing body that contacts the hook of the lock spring and reduces the diameter of the coil is attached to the lock body that is to be rotated in conjunction with the adjustment screw. Further, a second pressing body is provided on the handle rotatably connected to the adjustment screw to abut on the hook of the lock spring and expand the diameter of the coil.

[0007] Also, the vertical dimensions of the second pressing body are set at arbitrary dimensions within the screwing range of the adjustment screw.

[0008]

[Operation] In the present invention, when the handle is rotated, the second pressing body is brought into contact with the hook of the lock spring, and is pressed from the hook in the coil winding direction toward the other hook,
Expand the diameter of the lock spring to allow it to rotate freely, and rotate the adjustment screw in the same direction to screw it up and down.

Furthermore, when the adjustment screw itself rotates, the lock body connected to the adjustment screw rotates in the same direction, and at this time, the first pressing body of the lock body presses the hook of the lock spring against the coil forming the opposite direction. Pressing in the opposite direction of winding reduces the diameter of the lock spring, increases the bonding friction force, and restricts the screw movement of the adjustment screw.

[0010] Furthermore, if the vertical dimensions of the second pressing body are made to correspond to the screwing range of the adjusting screw, the second pressing body can be moved up and down in conjunction with the vertical movement of the adjusting screw. When the pressing state of the hook by the body is released, the second pressing body presses the first pressing body of the lock body in the same direction, coils the hook of the lock spring, and presses it in the opposite direction, reducing the diameter of the lock spring. to increase the bonding friction force and restrict the screw movement of the adjustment screw.

[0011]

[Embodiment] An embodiment of the present invention will be described below based on the drawings. Reference numeral 1 denotes a pressure regulating valve which is a type of fluid control valve according to the present invention, and the pressure regulating valve 1 includes a valve box 2 and a lid body. 3 is provided with a valve body 9 that is seated by a valve spring 8 at a valve port 7 that communicates the primary side pressure chamber 5 and the secondary side pressure chamber 6. A diaphragm valve 11 is provided in contact with the diaphragm valve 11, and an adjustment spring 12 for pressing the diaphragm valve 11 downward is disposed within the lid body 3.

Reference numeral 13 denotes an automatic lock handle for adjusting the elastic force of the adjustment spring 12, and the automatic lock handle 13 has a fitting groove 14 around the outer circumferential surface of the neck portion of the upper part of the lid body 3.
On the other hand, the lock spring 16 is formed by forming a coil with a smaller diameter in its free state than the inner diameter The lock spring 16 is attached to the fitting groove 14 in an enlarged diameter state so as to have a predetermined frictional force.

The hooks 15, 15a in this case are shown in FIG.
As shown in the figure, the inner sides of the bent portions face each other, and when the hooks 15, 15a are pressed in the direction of coil winding from one end side of the lock spring 16 to the other end side, that is, when both hooks 15, 15a are When the distance X1 between the opposing sides is reduced, the coil diameter is expanded, and the hooks 15, 15a
When pressed in the opposite direction to the coil winding opposite to the above, that is, the distance X1 between the opposing sides of both hooks 15, 15a
The coil diameter is reduced when the coil is expanded.

Reference numeral 17 denotes an adjustment screw, and the adjustment screw 17 has a hexagonal screw head 18 at its upper end, and is screwed into the upper end of the neck diameter portion of the lid body 3, and is screwed into the upper end of the adjustment spring 12. It is in contact with the

Reference numeral 19 denotes a lock body, and the lock body 19 has an insertion hole 20 in the center thereof through which the threaded portion of the adjustment screw 17 is inserted, and locking pieces 21, 21a...
are erected to form a fitting part 22 to be fitted with the screw head 18 of the adjustment screw 17, and a connecting piece 23, on the outer circumferential side of the fitting part 22.
23a... are provided vertically, and a first pressing member 24 having a predetermined width and substantially L-shaped, extending outward from the fitting portion 22 and bent downward, is provided vertically.

The width of the first pressing body 24 is equal to the width of both hooks 15, 15 of the lock spring 16 attached to the upper part of the lid 3.
The dimensions are set to be slightly smaller than the distance X1 between the opposing sides of a.

The fitting portion 22 of the lock body 19
At the same time, fit the screw head 18 of the adjustment screw 17 into
It is located between a.

Reference numeral 25 denotes a handle, and the handle 25 has a cylindrical crown shape and has an inner diameter set to a size that does not contact the hooks 15, 15a of the lock spring 16 attached to the upper part of the lid body 3. The hook 15 is formed in the circumferential direction of the inner peripheral surface 27 of the handle body 26.
, 15a are provided so as to protrude vertically in parallel with a distance larger than the outer distance X2 of the second pressing bodies 28, 28a.

Regarding the vertical dimensions of the second pressing bodies 28, 28a, they may be provided over the entire upper and lower areas of the inner circumferential surface 27 of the handle body 26, or the dimensions correspond to the screwing range of the adjusting screw 17, which is set arbitrarily. It may be provided at

Then, the connecting pieces 23, 23a of the lock body 19 are inserted into the arc-shaped slits 30, 30a formed in the upper wall surface 29 of the handle body 26 and protruded outward. ..., the screw head 18 of the adjustment screw 17 is loosely fitted into the recess 32 provided on the lower surface of the upper wall surface 29, and the second pressing body 2
8, 28a within the opposing spacing of the lock springs 16.
The hooks 15, 15a of the lid body 3 are positioned so as to be rotatably mounted on the top of the lid body 3.

Furthermore, as shown in FIG. 5, hooks 15, 15a
In another embodiment using a lock spring 16 in which the outsides of the bent portions of the lock springs 16 are opposite to each other, the lock spring 16 in this case first moves the hooks 15, 15a from one end of the lock spring 16 to the other end. When the hooks 15, 15a are pressed in the coil winding direction, that is, when the distance X4 between the opposing sides of both hooks 15, 15a is expanded, the coil diameter is expanded, and the hooks 15, 15a are pushed in the coil winding direction opposite to the above. When pressed, that is, when the distance X4 between the opposing sides of both hooks 15, 15a is reduced, the coil diameter is reduced.

Furthermore, the first pressing body 24 is formed by forming slits 34 in the cylindrical crown-shaped base body 33 at intervals slightly larger than the interval X3 on the outside of the bent portions of the hooks 15, 15a of the lock spring 16. On the other hand, a second pressing body 28 is provided on the inner peripheral surface 27 of the handle body 26 and has a width slightly smaller than the distance X4 between the bent portions of the hooks 15 and 15a.
It is intended to protrude.

Further, an insertion hole 20 through which the threaded portion of the adjustment screw 17 is inserted is formed in the center of the upper wall surface 35 of the base body 33, and locking pieces 21, 21a, etc. are provided upright on the outer circumferential side of the insertion hole 20. ,
A fitting part 22 to be fitted with the screw head 18 of the adjustment screw 17 is formed, and connecting pieces 23, 23a are provided on the outer circumferential side of the fitting part 22.
is set upright, and an adjustment screw 17 is provided on the lower surface of the upper wall surface 29.
A recess 32 into which the screw head 18 and the fitting portion 22 are loosely fitted.
The lock body 19 is formed by forming the lock body 19.

Furthermore, the bending direction of the hooks 15, 15a of the lock spring 16 of the automatic lock handle 13 is not limited to the above embodiment;
It may be bent inward.

Note that the pressure regulating valve 1 in this embodiment is a type of fluid control valve, and is not limited to this pressure regulating valve 1 in any way. For example, a screw type needle valve e as shown in the prior art may be rotated , the flow rate control valve b may adjust the degree of opening of the valve port f depending on the amount of screwing. Any structure may be used as long as it eliminates the transmission of rotational force to the movable main driving member and aims at transmitting the rotational force from the main driving member to the driven member.

Next, the function of the automatic lock handle in the fluid control valve according to the present invention will be explained. First, when the adjustment screw 17 is screwed up and down to adjust the elastic force of the adjustment spring 12, the handle 25 by rotating the lock spring 1 clockwise or counterclockwise, the second pressing bodies 28 and 28a provided on the inner circumferential surface 27 of the handle body 26 are rotated clockwise or counterclockwise.
6, and press it in the coil winding direction.

By pressing the hooks 15, 15a of the lock spring 16 in the coil winding direction by the second pressing bodies 28, 28a, the interval X1 of the lock spring 16 shown in FIG. In the lock spring 16 shown in FIG. 5, the interval X4 is enlarged, and therefore the coil diameter of the lock spring 16 is enlarged, and the bonding friction force of the lock spring 16 is released and the lock spring 16 becomes in a free rotation state, so that the hook 15 , 15a, the first pressing body 24 of the lock body 19 is pressed in the same direction, and the adjustment screw 17, which is connected to the lock body 19 so as to rotate, is rotated in the same direction and screwed up and down. let

Furthermore, if the vertical dimension X5 of the second pressing bodies 28, 28a is set to a dimension corresponding to the screwing range of the adjusting screw 17, the handle 2 will move in conjunction with the vertical movement of the adjusting screw 17.
By also moving up and down, the second pressing bodies 28, 28a
The pressing state on the hooks 15, 15a is released,
The second pressing bodies 28, 28a press the first pressing body 24 of the lock body 19 in the same direction, and the first pressing body 24 presses the hooks 15, 15a in the opposite direction to the coil winding, as shown in FIG. In the lock spring 16 shown in FIG. 5, the interval X1 is enlarged, while in the lock spring 16 shown in FIG. It acts as a brake action and restricts the screw movement of the adjustment screw 17.

Furthermore, even if the adjusting screw 17 tries to rotate in the direction of loosening, the lock body 19 that is connected to the adjusting screw 17 tries to rotate in the same direction as the adjusting screw 17, but At this time, the first pressing body 24 of the lock body 19 presses the hooks 15, 15a of the lock spring 16 in the opposite direction of the coil winding, so the diameter of the lock spring 16 is reduced in the same manner as described above, and the lock spring 1
The joint frictional force of 6 increases, which acts as a braking action and restricts the screw movement of the adjustment screw 17.

[0030]

In summary, the present invention provides a fluid control valve that controls the pressure, flow rate, direction, etc. of fluid by vertical movement of an adjustment screw, and the outer peripheral surface of the neck portion of the valve body 4 into which the adjustment screw 17 is screwed. A lock spring 16 having hooks 15, 15a at both ends is attached by friction force, and the hooks 15, 15a of the lock spring 16 are brought into contact with the lock body 19, which is to be rotated in conjunction with the adjustment screw 17, to reduce the coil diameter. A handle 25 rotatably connected to the adjustment screw 17 is provided with a first pressing body 24 for increasing the coil diameter, and a second pressing body 28, 28a is provided on the handle 25, which is rotatably connected to the adjustment screw 17, and that contacts the hooks 15, 15a of the lock spring 16 to increase the coil diameter. As the handle 25 is rotated, the second pressing bodies 28, 28a are brought into contact with the hooks 15, 15a of the lock spring 16 and pressed in the direction of coil winding, thereby expanding the diameter of the lock spring 16 and bringing it into a freely rotating state. Therefore, the rotational force of the handle 25 can be transmitted to the adjustment screw 17 via the lock body 19, and the adjustment screw 17 can be rotated in the same direction and screwed up and down, and the adjustment screw 17 itself can be rotated. In this case, the lock body 19 connected to the adjustment screw 17 rotates in the same direction, and at this time, the first pressing body 24 of the lock body 19 coils the hooks 15, 15a of the lock spring 16 and presses them in the opposite direction to lock them. By reducing the diameter of the spring 16 and increasing the bonding frictional force, the screw movement of the adjustment screw 17 can be restricted.

Therefore, the adjustment screw 17 can be easily rotated with one hand without having to loosen the screw-type handle c and the lock nut g that prevents the needle valve e from loosening as in the conventional case. Furthermore, loosening of the adjustment screw 17 can be reliably prevented, and the lock nut g is no longer required, so work can be done without using any adjustment tools, and workability in narrow spaces can also be improved. I can do it.

Furthermore, since the vertical dimension X5 of the second pressing bodies 28, 28a is set at an arbitrary dimension within the screwing range of the adjusting screw 17, the vertical movement of the adjusting screw 17 is linked to the vertical movement of the handle 2.
By also moving up and down, the second pressing bodies 28, 28a
The pressing state on the hooks 15, 15a is released,
The second pressing bodies 28, 28a press the first pressing body 24 of the lock body 19 in the same direction, and the lock spring 1
The hooks 15, 15a of 6 are coiled and pressed in the opposite direction to reduce the diameter of the lock spring 16, increasing the bonding friction force and regulating the screwing of the adjustment screw 17. This has great practical effects, such as being able to prevent damage to the threads and over-adjustment, as well as preventing the adjustment screw 17 from separating from the fluid control valve.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an automatic locking handle according to the present invention.

FIG. 2 is a cross-sectional view of a main part of the automatic lock handle.

FIG. 3 is a partially omitted partial cross-sectional view of the automatic lock handle.

FIG. 4 is a cross-sectional view of a fluid control valve using the same self-locking handle.

FIG. 5 is an exploded perspective view of another embodiment of the self-locking handle.

FIG. 6 is a sectional view of a main part of the automatic lock handle.

FIG. 7 is a partially omitted partial sectional view of the automatic lock handle.

FIG. 8 is a cross-sectional view of a fluid control valve using the same self-locking handle.

FIG. 9 is a sectional view taken along line AA in FIG. 2;

FIG. 10 is a sectional view taken along line BB in FIG. 6;

FIG. 11 is a sectional view of a pressure regulating valve in a conventional fluid control valve.

FIG. 12 is a sectional view of a flow rate adjustment valve in a conventional fluid control valve.

[Explanation of symbols]

4 Valve body 15, 15a Hook 16 Lock spring 17
Adjustment screw 19 Lock body 24 First pressing body 25 Handle 28, 28a Second pressing body

Claims (2)

[Claims] Claim 1: A fluid control valve that controls the pressure, flow rate, direction, etc. of fluid by the vertical movement of an adjustment screw, which has hooks at both ends on the outer peripheral surface of the neck portion of the valve body into which the adjustment screw is screwed. The lock spring is attached and attached by frictional force, and the lock body that is to rotate in conjunction with the adjustment screw is provided with a first pressing body that contacts the hook of the lock spring and reduces the coil diameter, and is rotatable with respect to the adjustment screw. An automatic lock handle for a fluid control valve, characterized in that the handle connected to the lock spring is provided with a second pressing body that abuts the hook of the lock spring and expands the diameter of the coil. 2. The automatic lock handle for a fluid control valve according to claim 1, wherein the vertical dimension of the second pressing body is set at an arbitrary dimension within the screwing range of the adjustment screw.