JPH0842742A - Handle mechanism for manual operating valve - Google Patents

Abstract

PURPOSE:To provide excellent safety and improve operability in a type having a resin body. CONSTITUTION:A shaft 5 is divided into a lower shaft 6 and an upper shaft 7 having a male screw 71 formed thereon, the lower shaft 6 is moved and arranged in the opening direction of a valve body 3 by a first energizing means 2A, and its movement is regulated by touching a projection part 61 provided on the outer circumferential part of the lower shaft 6 by a body-side locking part 14 in the full opened state of the valve body 3. On the other hand, the upper shaft 7 cart be idled on and after the full opened state of the valve body 3, and it is rotated in one direction from this idling state, whereby it starts to move on the lower shaft side while screwing the male screw part 71 to a body-side female screw 16 to push and move the lower shaft 6 in the closing direction of the valve body 3 against the energizing pressure of the first energizing means 2A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handle mechanism of a hand-operated valve which is suitable for piping of chemicals or pure water used in a semiconductor manufacturing process in which metal ions are hardly mixed.

[0002]

2. Description of the Related Art For example, when a highly corrosive chemical or high-purity water is transferred through a pipe in the semiconductor manufacturing or chemical industry fields, a valve used therein is made of a synthetic resin having excellent corrosion resistance and the like. In addition to a structure that is opened and closed by a machine or an electromagnetic operation, a manually operated type is often used.

FIG. 5 shows a conventional example of the manually operated valve. The manually operated valve shown in the figure has a body a, a valve seat b,
Main components such as the valve body c and the shaft d are made of resin,
A flow passage e in which the valve seat b is integrally provided on the lower side of the body a
, And has a structure for opening and closing a valve element c formed of a diaphragm or the like provided at the lower end of a shaft d with respect to the valve seat b. In this case, the shaft d is in a state in which the external thread f formed in the intermediate portion is engaged with the internal thread g on the body a side.
By rotating the handle h at the upper end, the flow passage e
Control the opening and closing of the fluid passing through. A lid j is integrally assembled to the body a, and the upper end side of the shaft d is projected to the outside through an insertion hole provided in the lid j.

[0004]

As described above, in the conventional manually operated valve, in the handle which is rotated by utilizing one end portion of the shaft d directly connected to the valve body c, when the valve is fully opened, The handle h is rotated in the protruding direction of the shaft d, and the rotation is stopped when the large-diameter portion forming the male screw f comes into contact with the inner wall of the lid j.
However, in such a turning operation of the handle h,
Although the large-diameter portion forming the male screw f is in contact with the inner wall of the lid j, when the handle h is further rotated in the same direction, when the body a side of the lid j or the like is made of metal, Although it cannot be further rotated by hand, if it is made of resin, not only the screwing state of the screw is impaired, but also cracks may occur on the body a side of the lid j or the like, resulting in damage. This is because thick rubber gloves are generally used when handling chemicals, and the operator rotates the handle h through the rubber gloves, so that a large force is likely to be applied carelessly. It is considered that the valve fully opened state is judged by the operator's hand feeling or intuition, and if the gloves are used, the feeling may be deviated.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a manual valve opening / closing handle mechanism which is excellent in safety and improved in operability.
Furthermore, other purposes will be clarified one after another in the content described below.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to perform pivotal operation by utilizing one end portion of a shaft directly connected to a valve body arranged in a resin body, which is an essential part of the present invention. Thus, in the handle mechanism of the manual valve for controlling the fluid passing through the fluid passage of the body or the pipe connected to the body, in the lower shaft where the shaft is directly connected to the valve body and the upper shaft where the male screw is formed on the lower shaft side. It is divided into two parts, the lower shaft is movably arranged in the axial direction in the body, and is arranged to move in the opening direction of the valve body by the urging force of the first urging means, and in the fully opened state of the valve body. The protrusion provided on the outer peripheral portion of the lower shaft is applied to the locking portion provided on the body side to restrict its movement, while the upper shaft is free to rotate after the valve body is fully opened. Ri, starts moving to the lower shaft side while the external thread screwed into the internal thread provided on the body side by being rotated operated from the idling state in one direction,
After the start of the movement, the lower shaft is pushed in the closing direction of the valve body to move against the urging pressure of the first urging means.

In the present invention described above, it is more preferable to configure as follows. First, there is provided a cover member which is rotatably assembled to the body and is capable of integrally rotating the upper shaft. Second, the upper shaft is urged toward the lower shaft by the urging force of the second urging means, and when the upper shaft is idling, the male screw is held in contact with the female screw on the body side. It is that you are.

[0008]

According to the present invention, when the valve is closed, the upper shaft (if a cover member is provided) is rotated from the idling state to the screw fitting state. In other words, the upper shaft is rotated in one direction to start moving to the lower shaft side while screwing the male screw into the female screw provided on the body side. After the movement in the screwed state is started, the upper shaft hits the lower shaft and pushes and moves the lower shaft while being further screwed in against the urging pressure of the first urging means. as a result,
The valve element closes to the valve seat via the lower shaft.
On the contrary, when the valve is opened, the upper shaft (when the cover member is provided, it is rotated in the opposite direction). The upper shaft is moved in the direction away from the lower shaft through the meshing of the screws by this rotating operation. In this moving process, first, since the lower shaft is urged by the first urging means, the lower shaft is interlocked and moved to the fully opened state of the valve body, and then the protrusion is engaged with the locking portion on the body side. It abuts and stops its movement. From this state, the upper shaft moves through the meshing of the screws and separates from the lower shaft. After the upper shaft separates from the lower shaft, the meshing of the screws is released a little later, and the upper shaft enters an idle state.
In this way, the upper shaft forms an idling state to prevent unnecessary force from being applied to the body side, and it is possible to sense that the upper shaft has been opened to the person operating by hand. It makes it possible to understand and operate accurately.

[0009]

1 to 4 show an embodiment to which the present invention is applied, FIG. 1 is a sectional view showing an outline of the apparatus configuration in a closed state of a valve, and FIG. 2 shows a cover member and an upper shaft assembled to a body. FIG. 3 is a cross-sectional view showing the valve in an open state as viewed from below. Note that FIG. 1 corresponds to a cross section taken along line AA of FIG. 2, and FIG. 3 corresponds to a cross section taken along line BB of FIG. In the manually operated valve shown in the figure, the components such as the body 1, the valve body 3, the cover member 4, and the shaft 5 are made of a synthetic resin such as fluororesin having excellent corrosion resistance or chemical resistance. This is the same as the conventional one in that the valve 1 is opened and closed by rotating the one end of the shaft 5 which is directly connected to the valve body 3. The different structure is that the shaft 5 is divided into two parts, a lower shaft 6 directly connected to the valve body 3 and an upper shaft 7 in which a male screw portion 71 is partially formed. 7 has a cover member 4 that can be integrally rotated, a spring 2A that is a first biasing means, a spring 2B that is a second biasing means, and the like. These main parts will be described in detail.

The body 1 has a shaft insertion hole 11 formed therein, and the cover member 4 is freely rotatably assembled to the outer peripheral portion 12 and the orbital groove 13 formed on the upper side and having a smaller diameter. The tube portion 8 is integrally connected to the lower side. The pipe portion 8 is connected to the pipe side via connection screw portions 81 formed on both sides thereof. A valve seat 82 is formed to project from an intermediate portion in the pipe, and the valve body 3 is opened and closed with respect to the valve seat 82. The valve element 3 is a diaphragm,
The central mounting portion 31 is coupled to the recess provided in the end surface portion of the lower shaft 6, while the peripheral portion 32 is attached to the body 1.
And the tube 8 in a fixed state. The shaft insertion hole 11 forms a hole portion forming the locking portion 14 along the upper side from the bottom, a smallest diameter hole portion, and a circular groove 15 for receiving and arranging the lower end portion of the spring 2A. It has a large-diameter hole, and a female screw 16 is formed at a substantially intermediate position of the largest-diameter hole. Reference numeral 9A is the body 1
Reference numeral 9B denotes a sealing member such as an o-ring.

The lower shaft 6 is movably disposed in the shaft insertion hole 11 and has a projection 61 on the lower side of the shaft.
The upper movement is restricted by contacting with. The lower shaft 6 is formed with a double step on the upper side of the shaft, the largest diameter step end face 62 thereof, and the circumferential groove 1 of the shaft insertion hole 11.
5 and a spring 2A which is arranged in a compressed state, and is normally moved upward by the spring pressure of the spring 2A until the projection 61 comes into contact with the locking portion 14 as shown in FIG. .

The upper shaft 7 is composed of a large-diameter portion forming a male screw 71 along the upper side from the bottom, an elliptical portion 72 formed in a substantially elliptical cross section, and a small-diameter shaft portion 73. It has a contact projection 74 formed at the center. Then, after the upper shaft 7 is fitted into the cover member 4, it is assembled to the body 1 side.

As shown in FIGS. 1 to 3, the cover member 4 is divided into six slits 41 from a substantially middle portion to a lower portion, and has a plurality of one-piece portions 43 having locking projections 42 on the lower inner wall.
Is formed on the body 1 while expanding the diameter of each piece 43.
It is fitted to the outer peripheral portion 12 on the side, and is freely rotatably assembled to the body 1 side in a state where the locking projection 42 is fitted in the orbiting groove 13. Also, inside the cover member 4, an insertion hole 44 and a through hole 45 are provided above each piece 43, and in the radial direction crossing the insertion hole 44, FIGS.
A long and thin elliptical fitting hole 46 is formed as shown in FIG. In the fitting hole 46, the spring 2B is wound around the small diameter shaft portion 73 of the upper shaft 7, and the elliptical portion 7
2 is fitted while resisting the spring pressure of the spring 2B.
Then, from this state, the body 1 is assembled.

In this case, as shown in FIG. 3, the cover member 4 is fitted to the body 1 by fitting the orbiting groove 13 and the locking projection 42, and by fitting the fitting hole 46 to the elliptical portion 72 of the upper shaft 7. It is integrated with the upper shaft 7 so as to freely rotate.
The upper shaft 7 is moved downward by the spring pressure of the spring 2B wound around the small-diameter shaft portion 73, and keeps a gap L with respect to the upper end surface of the lower shaft 6 so that the projection 7
No. 4 is positioned to oppose (see FIG. 4 (a)). The spring 2B as the second urging means has a smaller spring pressure than the spring 2A as the first urging means.

Next, the handle operation of the above manual valve will be described with reference to FIGS. 4 (a) and 4 (b).
FIG. 4A is an enlarged view of an opposing portion between the upper shaft 7 and the lower shaft 6 in FIG. 3, and FIG. 4B shows a state in which the upper shaft 7 comes into contact with the lower shaft 6 after screwing is started. ing. The upper shaft 7 is constantly pushed toward the lower shaft 6 by the spring 2B in a freely spinning state, and the male screw 71 is lightly in contact with the female screw 16 on the body 1 side as shown in FIG. Is held in. In this state, the upper shaft 7 and the lower shaft 6
Is formed between them. First, when the valve is closed from the valve open state of FIG. 3, the cover member 4 is manually rotated in one predetermined direction, and the upper shaft 7 is rotated integrally with the cover member 4. Then, since the male screw 71 is lightly in contact with the female screw 16 as shown in FIG. 4A, the screw is smoothly engaged and the screwing is started. Immediately after the screwing proceeds, the lower projection 74 of the upper shaft 7 comes into contact with the upper end surface of the lower shaft 6, and the state shown in FIG. Since the screwing process between FIGS. 4A and 4B is performed without receiving the urging force of the spring 2A, the meshing of the screws is immediately formed, and the turning operation can be performed with a small force. When the rotation operation is further performed, the lower shaft 6 is further pressed and moved downward from the state shown in FIG. 4B while the male screw 71 of the upper shaft 7 is screwed into the female screw 16 of the body 1. When the lower shaft 6 moves, the spring 2
Of course, the spring pressure of A is received. Then, as shown in FIG. 1, when the valve body 3 comes into close contact with the valve seat 82 due to the movement of the lower shaft 6, the valve is held in a closed state.

On the contrary, when the valve is opened, the cover member 4 is rotated in the opposite direction to that when the upper shaft 7 is closed. Then, the upper shaft 7 is moved upward through the engagement of the screws. To explain this moving process in detail, first,
Since the lower shaft 6 is biased by the spring 2A, the lower shaft 6 is moved in conjunction with the valve body 3 until the valve body 3 is fully opened, and then the protrusion 61 comes into contact with the locking portion 14 to stop the movement. From this state, the upper shaft 7 moves further through the engagement of the screw and separates from the lower shaft 6. Shortly after the upper shaft 7 is separated from the lower shaft 6, the screw engagement is released and the idle shaft is kept free as shown in FIG. Thus, by forming the upper shaft 7 in the idling state, unnecessary force is not applied to the body 1 side as in the conventional case, and safety can be improved. You can operate it accurately because you can feel it. Also,
Since the cover member 7 is attached to the body 1 side so as to freely rotate, stabilization at the time of the rotation operation can be obtained, and the body 1 can be easily simplified. In addition, since the lower shaft 6 has a projection 61, which is brought into contact with the locking portion 14 on the body 1 side to restrict the upward movement, the gap L described above can be formed. Furthermore, the engagement of the screws is released, and the resistance of the cover member 4 during idling can be reduced. And in addition to this, the spring 2
With the presence of B, with the gap L between the shafts 6 and 7 maintained, the screwing of the upper shaft 7 can be started immediately before the resistance of the spring 2A is received when the valve is closed.

The present invention is not limited to the valve structure of the embodiment, but can be generally applied as long as the main constituent members of the manually operated valve are made of resin.

[0018]

As described above, according to the present invention,
When opening the valve, when rotating the upper shaft in the opposite direction to closing, the upper shaft is moved in the direction away from the lower shaft through the engagement of the screws,
The engagement of the screws is released and idling occurs, and at the same time, the valve element is opened from the valve seat via the lower shaft and away from the valve seat. In this way, by forming the upper shaft in the idling state, unnecessary force is not applied to the body side with respect to the conventional structure, thereby improving safety, and the person operating by hand is in the open state. You can operate it accurately because you can feel it intuitively. Also, when closing the valve, when the upper shaft is rotated in one direction from the idling state, the upper shaft starts moving toward the lower shaft while screwing its male screw into the female screw on the body side, and this movement is started. After the start, the upper shaft hits the lower shaft, and the lower shaft is pushed and moved while being further screwed in against the urging pressure of the first urging means. Can be obtained at

In addition, since the body is freely rotatably mounted and provided with a cover member capable of integrally rotating the upper shaft, the operation section can be stabilized and the body can be simplified. The upper shaft is urged toward the lower shaft by the urging force of the second urging means, and when the idling state is maintained, the male screw is held in contact with the female screw on the body side. It is possible to immediately obtain the meshing of.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an outline of a device configuration to which the present invention is applied in a valve closed state.

FIG. 2 is a view of a cover member and the like assembled to the body having the above-described device configuration as viewed from below.

FIG. 3 is a cross-sectional view schematically showing an apparatus configuration to which the present invention is applied, with a valve in an open state.

FIG. 4 is an enlarged cross-sectional view showing a gap between the upper and lower shaft portions in FIG.

FIG. 5 is a schematic cross-sectional view showing an example of a device configuration of a conventional manually operated valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Resin body 3 Valve body 4 Cover member 5 Shaft 6 Lower shaft 7 Upper shaft 2A 1st urging means 2B 2nd urging means 14 Locking part 16 Female screw 61 Protruding part 71 Male screw

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsugu Ichiki 2336 Higashiishikawa, Katsuta City, Ibaraki Prefecture M-Itechno Co., Ltd.

Claims (3)

[Claims] 1. A fluid passing through a fluid passage of the body or a pipe connected to the body by rotationally utilizing one end portion of a shaft directly connected to a valve body arranged in a resin body. In a handle mechanism of a manual valve for controlling opening and closing, the shaft is divided into two parts, a lower shaft directly connected to the valve body and an upper shaft having a male screw formed on the lower shaft side. In the opening direction of the valve body by the urging force of the first urging means, and the protruding portion provided on the outer peripheral portion of the lower shaft in the fully opened state of the valve body is disposed on the body side. While the movement of the upper shaft is restricted by hitting a locking portion provided on the upper shaft, the upper shaft is free to rotate after the valve body is in the fully opened state. As a result, the male screw starts to move toward the lower shaft side while being screwed into the female screw provided on the body side, and after the movement starts, the lower shaft resists the urging pressure of the first urging means. The handle mechanism for a manual valve, wherein the valve mechanism is pushed in the closing direction of the valve body and moves. 2. A handle mechanism for a manual valve according to claim 1, further comprising a cover member rotatably mounted on said body and capable of integrally rotating said upper shaft. 3. The upper shaft is urged toward the lower shaft by the urging force of the second urging means, and when the upper shaft is idling, the male screw is held in contact with the female screw on the body side. The handle mechanism for a manual valve according to claim 1 or 2, wherein: