KR960008272B1 - Speed controller - Google Patents

Abstract

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Description

Speed controller

1 is a longitudinal sectional view showing a speed controller according to a first embodiment of the present invention.

2 is a longitudinal sectional view showing a speed controller in which pressure fluid is discharged.

3 is a longitudinal sectional view showing a speed controller according to a second embodiment of the present invention.

4 is a longitudinal sectional view schematically showing the speed controller shown in FIG. 3 in which pressure fluid is discharged.

5 is a longitudinal sectional view showing a speed controller according to a third embodiment of the present invention.

6 is a longitudinal sectional view showing a speed controller according to a third embodiment of the present invention.

7 is a longitudinal sectional view showing a speed controller according to a third embodiment of the present invention.

8 is an explanatory diagram of the speed controller actuator shown in FIG.

* Explanation of symbols for main parts of the drawings

10,80: speed controller 12: first sheet portion

14,82: line joint 16,84: cylindrical body

18: needle valve body 20, 86: check valve

22,88: first hole 24,90: second hole

26,92: third hole 50,102: first passage

52, 108: Second passage 72,104: Rib

76: cylinder

[Background of invention]

[Field of Invention]

The present invention relates to a speed controller, and more particularly, to a speed controller of a type in which a check valve displaced in accordance with a flow direction of a pressure fluid is seated on a body sheet portion and arranged to be separated from the sheet portion.

[Private Technology]

Up to now, pneumatic devices for driving and controlling products using pressure fluids such as compressed air have been widely used. In one of these pneumatic devices, for example, a cylinder typically has a plurality of ports for introducing and discharging compressed air. Normally compressed air is introduced into this port by a speed controller.

The piston provided in the cylinder reciprocates at a given speed by the introduced compressed air. In this case, the method of increasing the effective cross-sectional area of each part of the speed controller connected to the line, the solenoid valve and the cylinder exposed to the compressed air to reduce the resistance to the compressed air and to smooth the compressed air smoothly It is effective for reciprocating motion, that is, shortening response time of cylinder and improving work efficiency.

However, when the effective cross-sectional area of the solenoid valve or the like is increased, the size of each device is increased accordingly, and the position where they are placed is limited. In particular, these devices are usually arranged adjacent to each other to effectively use a narrow space.

Therefore, they are preferably formed as small as possible.

When compressed air flows out of the electronic valve part, water or moisture contained in the air is cooled by adiabatic expansion, converted to water vapor state, and then attached to the inside of the tube or line. When the cylinder is operated in the next stage, water vapor is transferred into the cylinder by compressed air, so water or moisture gradually remains in the cylinder.

[Overview of invention]

The main object of the present invention is to be able to design in a small size, to improve the degree of freedom in arrangement of the devices, to reduce the response time of the cylinder, and the moisture generated in the discharge of the compressed air from the speed controller It is to provide a speed controller capable of releasing compressed air in a cylinder from a speed controller to prevent attachment.

It is another object of the present invention to provide a body having first and second connection portions capable of communicating with a pressure fluid flow channel formed in a pressure fluid device, a needle valve mechanism provided in a continuous state with a passage formed therein, and a pressure fluid. Is composed of a check valve that is in close contact with the passage and the second connecting portion formed in close contact with the sheet portion formed in the main body when the first connecting portion is introduced from the first connecting portion, wherein the check valve Providing a speed controller which is separated from the sheet portion when introduced from the valve and closes the communication between the first and second connecting portions and releases the pressure fluid introduced from the second connecting portion through the passage into the needle valve mechanism. It is.

It is still another object of the present invention to provide a speed controller having a noise valve for removing noise generated in a pressure fluid discharged while the needle valve mechanism controls the flow ratio of the pressure fluid.

It is still another object of the present invention to provide a speed controller in which the first connecting portion is provided coaxially with the needle valve mechanism and the axis of the second connecting portion is perpendicular to the axis of the first connecting portion.

It is still another object of the present invention to provide a speed controller in which the second connecting portion is provided coaxially with the needle valve mechanism and the axis of the first connecting portion is perpendicular to the axis of the second connecting portion.

It is a further object of the present invention to provide a valve portion seated on a seat portion formed within a body, and a flexible lip in sliding contact with the inner wall surface of the body when pressure fluid is introduced from the second connection portion of the body. It is to provide a speed controller having a.

Another object of the present invention is to open and close both passages in which the body communicates with the first sheet portion and the needle valve mechanism and the second connecting portion for opening and closing the communication between the first connecting portion and the second connecting portion. And a second seat portion, the speed controller being movably disposed along its axis such that the check valve is seated on the first and second seat portions.

A further object of the present invention is further composed of a cylindrical body provided coaxially in the main body and a ring-shaped check valve fitted externally so as to slide on the outer circumferential wall of the cylindrical body, wherein the cylindrical body is formed on the outer circumference of the cylindrical body. First and second seat portions formed on the grooves formed in the wall and on which the check valves are seated according to sliding movements of the ring-shaped check valves, passages communicating with the needle valve mechanisms, and ring-shaped check valves on the first sheet portions. The present invention provides a speed controller that includes an opening for closing the passage when the passage is in communication with the second connecting portion and seated on the second seat portion when seated thereon.

It is a further object of the present invention to provide a speed controller in which the main body has a receiving member formed therein which includes a first sheet portion on which the valve portion of the check valve is seated and an inclined hole into which the lip of the check valve is fitted.

Another object of the present invention is that the body includes a flexible lip which closes the communication between the passageway formed in the body and the second connection part when the main body is introduced from the pressure rapeseed and the first connection part. It has a fixed check valve disposed therein, wherein the flexible lip is separated from the sheet portion and remains in contact with the inner wall surface of the main body when the pressure fluid is introduced from the second connecting portion. It is to provide a speed controller which closes the communication with the two connecting parts.

These and other objects, features and advantages of the present invention will become apparent from the description and the claims taken in conjunction with the accompanying drawings, in which preferred embodiments of the invention are shown by way of example.

Example

1 and 2, reference numeral 10 denotes a speed controller according to a first embodiment of the present invention. The speed controller 10 is basically integrated into the tube or line joint 14 and the line joint 14 and has a stepped cylindrical body 16 and a needle valve inserted into the cylindrical body 16. The main body 18 and the check valve 20 hold | maintained in engagement with the front-end | tip of the cylindrical body 16 are comprised.

The line joint 14 has a cylindrical shape with both ends open. The first hole 22 serving as a hole or opening through which the pressure fluid flows is formed in one of the ends of the line joint 14 (first connection portion). The inner end of the first hole 22 communicates with the third hole 26 through the second hole 24 having a smaller diameter.

The first sheet portion 12 is formed by an annular projection 25 having a second hole 24 formed therein. The fourth hole 28 communicating with the third hole 26 is formed in the outer circumferential wall of the line joint 14. The annular wall portion 30 (second connection portion) surrounding the fourth hole 28 and extending outward is formed at the same position where the fourth hole 28 is formed. The connecting member 31 is fitted in the annular wall portion 30.

A so-called one-touch type joint or joint 32 is inserted into the first hole 22. The one-touch type joint 32 is a release bush 34 having a plurality of cutout portions formed at its bottom, a chuck 38 formed in a ring shape and formed of a metal plate provided on an outer circumferential wall of the release bush 34. , A collet 40 made of synthetic resin, and a seal 36 formed of an elastic member such as raw rubber or synthetic rubber.

The cylindrical body 16 is inserted into the third hole 26 formed in the line joint 14 from the open end of the third hole 26. The seal ring 42 is interposed between the inner circumferential wall of the line joint 14 and the outer circumferential wall of the cylindrical body 16. The cylindrical body 16 has a first cylindrical portion 44 which is integrally connected to the second cylindrical portion 48 having a small diameter and large in diameter through a stepped portion 46. The first cylindrical portion 44 has a first passage 50 formed in itself along its own axis and having one end communicating with the second passage 52 having a large diameter. The second passage 52 communicates with the plurality of third passages 54a and 54b which are set in a direction perpendicular to the axis of the second passage 52 at a position near the end of the second passage 52. The end of the cylindrical body 16 having the first passage 50 formed therein is used as the second sheet portion 56 for the check valve 20. Reference numeral 58 denotes a valve portion used to form a narrow space formed between the valve tip portion 64 and the valve portion 58 of the body 18.

The body 18 of the needle valve is surrounded by a silencer 62 fixed to the stepped portion 46 of the cylindrical body 16 used to form the valve portion 58.

The screw 66 is machined on one end of the body 18, while the valve tip 64, which is tapered, is formed on the other end of the body.

The control unit 68 is attached to one end of the screw 66. The noise member 62 formed of the sintered metal and the palm lock is maintained in contact with the sealing ring 70 fitted in the screw 66. The seal ring 70 is in close contact with the lock nut 60.

The check valve 20 has a cross section in the shape of an umbrella and includes a lip 72 and a valve body 74. The check valve 20 is formed of an elastic member such as raw rubber or synthetic rubber. In addition, the check valve 20 is arranged in the third hole 26 of the line joint 14 and between the first sheet portion 12 and the second sheet portion 26 in a movable manner in its axial direction. It is provided. The outer circumferential wall of the lip 72 is in contact with the inner circumferential wall of the third hole 26. The valve body 74 has a cross section in the shape of a ladder.

In addition, the valve body 74 is formed on one side and has a diameter larger than the inner diameter of the annular projection 25, and is formed on the other side and substantially the outer diameter of the second sheet portion 56. It has sheets with the same diameter.

In FIG. 1, reference numeral 76 denotes a cylinder to which the speed controller 10 is fixedly mounted.

The speed controller 10 according to the present embodiment is configured as described above.

The operation of the speed controller 10 will be described below.

First, a connecting pipe or line connected to an unillustrated solenoid valve is previously inserted into a one-touch type joint 32 fitted in the first hole 22 of the speed controller 10, and the connecting member 31 is a cylinder ( Connected to the port 76). Furthermore, the control part 68 rotates to adjust the distance from the valve tip part 64 to the valve part 58.

The solenoid valve is then operated to supply pressure fluid to the cylinder 76.

Therefore, the pressure fluid flows from the one-touch type joint 32 into the second hole 24 of the line joint 14. Then, the check valve 20 is displaced to the right under the pressure of the pressure fluid (see FIG. 1), so that the valve body 74 is in close contact with the second sheet portion 56. As shown in FIG.

At this time, the pressure fluid bends the lip 72 of the check valve 20 to separate the tip of the lip 72 from the inner circumferential wall of the third hole 26 so that the third hole 26 is connected to the connecting member 31. Is in communication with a passage formed in the cavity (see FIG. 1). As a result, the pressure fluid is introduced into the cylinder 76 through the fourth hole 28 so as to displace the unillustrated piston in the cylinder 76 in the direction indicated by the arrow A.

Therefore, it is necessary to discharge the pressure fluid in the cylinder 76 when the piston is displaced in the direction indicated by the arrow B. FIG. At this time, the pressure fluid moves from the passage of the connecting member 31 to the third hole 26 through the fourth hole 28 and is in close contact with the second sheet portion 56 of the cylindrical body 16. 20 is displaced to the left as shown in FIG.

Therefore, the sheet formed in the valve body 74 is held in contact with the annular projection 25 so as to close the first sheet portion 12.

On the other hand, the lip 72 of the check valve 20 is also pressurized by the pressure fluid toward the inner circumferential wall of the third hole 26 to increase the outer diameter of the check valve 20 so that the pressure fluid is the second hole 24. Do not flow into the air (see Figure 2).

As a result, the check valve 20 is displaced toward the second hole 24 by the pressure fluid so as to close the second hole 24 of the line fitting portion 14 so that the third hole 26 is the first passage 50. To communicate with). Therefore, after the pressure fluid in the third hole 26 is introduced into the first passage 50, the pressure fluid passes through the space formed between the valve portion 58 and the valve tip portion 64 of the main body 18. 52). When the pressure fluid passes through the noise member 62 disposed in the second passage 52, various noises generated in the pressure fluid are removed. This pressure fluid is then discharged from the third passages 54a and 54b to air or the atmosphere. Then, the pressure fluid introduced into the first hole 22 of the solenoid valve, the connection line, and the speed controller 10, which is not illustrated, is discharged into the air from the discharge hole formed in the solenoid valve.

On the other hand, when the pressure fluid is discharged from the cylinder 76, the check valve 20 is closed from the second sheet portion 56 and closes on the first sheet portion 12 to close the passage extending toward the solenoid valve. Let's do it. Therefore, the pressure fluid passes through the first passage 50 formed in the second sheet portion 56 and then is discharged into the air through the needle valve body 18.

Therefore, the pressure fluid in the cylinder 76 can be discharged directly from the speed controller 10 into the air without passing through the solenoid valve, thereby making it possible to shorten the cylinder 76 response time.

In addition, water vapor is not generated in the third hole 26 by adiabatic expansion, thereby preventing water or moisture from remaining in the cylinder 76.

3 and 4 show a second embodiment of the present invention.

Elements of the same structure as those employed in the first embodiment in the second embodiment are denoted by the same reference numerals, and thus detailed description thereof is omitted.

The speed controller 8 according to the second embodiment is basically a pipe or line joint 82 having a pressure fluid flow channel, that is, formed in itself and integrally in the pressure fluid introduction passage 81 and the line joint 82. The cylindrical body 84 is fitted, the main body 18 of the needle valve inserted into the cylindrical body 84, and a check valve which can be displaced along the axis of the speed controller 80.

The line joint 82 is substantially L-shaped cylindrical body and has a first hole 88 into which the one-touch type joint or the joint 32 is inserted, and a second small diameter communicating with the first hole 88. A hole 90 and a third hole 92 extending in a direction perpendicular to the axis of the second hole 9 are all formed in the line joint 82.

The cylindrical body 84 is inserted into the third hole 9 of the line joint 82 through the seal ring 42. In addition, the cylindrical body 84 has a first cylindrical portion 94 extending along its own axis and having a small diameter, and a second cylindrical portion 98 including a stepped portion 96 having a large diameter. . The outer circumferential portion of the first cylindrical portion 94 having the smallest diameter is used as the recess 100. This first cylindrical portion 94 has a first passage 102 extending therethrough in a manner perpendicular to the recess 100. The ring check valve 86 is fitted with the recess 100 so as to be movable on the outer circumferential wall of the first passage portion 94.

The check valve 86 may be seated on the first and second sheet portions 103a and 103b. The lip 104 of the check valve 86 is bent outwardly, and the valve portion 105 may close the first passage 102.

The first passageway 102 communicates with the second passageway 108 formed in the first cylindrical portion 94 of the cylindrical body 84 along its own axis. The end of the second passage 108 communicates with the third passage 110 having a large diameter, which alternately communicates with the plurality of fourth passages 112a and 112b through the sealing member 62. The flat portion 109 of the cylindrical body 84 having the second passage 108 formed therein serves to form a narrow space between the valve tip portion 64 and the flat portion 109 of the body 18.

That is, it serves as a flat portion 109 and the so-called diaphragm.

The operation of the speed controller 80 according to the second embodiment configured as described above will now be described.

The check valve 86 is recessed in the cylindrical body 84 when the solenoid valve, which is not illustrated, is operated to introduce the pressure fluid through the second hole 90 into the third hole 92 from the one-touch type joint 32. It slides downward along the part 100 so that it may be seated on the 2nd sheet part 103b. Accordingly, the valve portion 105 of the check valve 86 blocks the communication with the main body 18 of the solenoid valve that closes or blocks the first passage 102 communicating with the recess 100.

On the other hand, the fluid pressure causes the lip 104 of the check valve 86 to be bent inward to shorten the outer diameter of the check valve 86. As a result, the pressure fluid causes the second hole 90 to pass through the pressure fluid introduction passage 81. To communicate. That is, the pressure fluid reaches the cylinder 76 through the connecting member 31 so as to displace the unillustrated piston of the cylinder 76 in the desired direction (see FIG. 3).

Then, when the pressure fluid is discharged from the cylinder 76, the pressure fluid reaches the lip of the check valve 86 from the passage formed in the connecting member 31 to bend the lip 104 outwards, and thus the check valve Increase the outer diameter of (86). As a result of this, the check valve 86 is displaced toward the upward position in the recess 100. Therefore, the check valve 86 is seated on the first sheet portion so that the inside of the cylinder 76 communicates with the second passage through the first passage (see FIG. 4).

At the same time, the lip 104 of the check valve 86 is pressed against the inner circumferential wall of the third hole by the pressure fluid to prevent the pressure fluid from being introduced into the second hole 90.

As a result, pressure fluid does not flow into the solenoid valve.

The pressure fluid passes through the second passage 108 through the first passage 102 of the concave portion 100, and noise generated in the pressure fluid is removed by the noise member 62, and the pressure fluid passes through the fourth passage ( From air 112a, 112b).

As described above, in the second embodiment, the speed controller 8 may be arranged in a vertical type when the space for locating the speed controller between the solenoid valve and the cylinder 76 is narrowest.

5 is a third embodiment of the present invention.

In the third embodiment, the structures of the same elements as those employed in the first embodiment are denoted by the same reference numerals and detailed description thereof will be omitted.

The speed controller 120 according to the third embodiment basically includes a cylindrical body 124 integrally fitted to the pipe or line joint 122 and the line joint 122, and a needle inserted into the cylindrical body 124. It consists of the body 18 of these valves, and the check valve 20 which can be displaced along the axis of the line joint 122.

A first hole 126 is formed in the extended cylindrical portion 122a of the line joint portion 122. It communicates coaxially with the ring-shaped groove 128 with one end of the second hole 126 having a small diameter. The second hole 130 communicates with the third hole formed in the short cylindrical portion 122b of the line joint 122 in a manner in which both axes are perpendicular to each other. Further, the third hole 132 communicates with the ring-shaped groove 128 through the hole 133.

A plurality of slits 134 extending in the circumferential direction are formed on the outer circumferential wall of one end of the cylindrical portion 122b in a predetermined angle range. Accordingly, the third hole 132 may communicate with the outside through the slit 134.

One-touch type joints or joints 32 and receiving members 136 are inserted into the first holes. The receiving member 136 has a narrow diameter hole 138 formed at the center thereof. The inclined hole 140 corresponding to the shape of the check valve 20 communicates with one end of the hole 138.

The first sheet portion 142 is formed at the boundary between the hole 138 and the inclined hole 140. The vortex diameter of the ring-shaped groove 128 corresponds to the outer diameter of the check valve 20.

The second sheet portion 142 is formed at the boundary between the inner end of the ring-shaped groove 128 and the second hole 130.

The pressure fluid introduction passage R is formed between the tip of the cylindrical body 124 and the connecting member 31. The cylindrical body 124 is formed with a first passage 146, which can communicate with the second hole 13. The first passage 146 communicates with the second passage 148 formed in the cylindrical body 124 along its axis, and the third passage 150 having a large diameter is coaxially with one end of the second passage 148. Communicate. The third passage 150 communicates with the fourth passage 152 formed in the cylindrical body 124 in the radial direction. The fourth passage 152 may communicate with the outside through the slit 134. The structure as described above and the operation of the speed controller according to the third embodiment will be described below.

When the solenoid valve (not shown) is operated to introduce pressure fluid from the one-touch type joint 32 into the hole 138 of the receiving member 136 to be attached to the line joint 122, the check valve 20 is connected to the second sheet portion. Under the pressure of the pressure fluid to be seated on 144 it is moved in the right direction as shown in FIG. 5 along the inclined hole 14. Therefore, the check valve 20 closes the second hole of the main body 74 to block the solenoid valve from communicating with the main body 18.

Moreover, the pressure fluid is used to bend the lip 72 of the check valve 20 inwardly, thereby reducing the outer diameter of the check valve 20. As a result, the hole 138 communicates with the pressure rapeseed introduction passage R through the groove 128 and the opening 133.

Therefore, the pressure fluid reaches the cylinder 76 through the connecting member to displace the piston (not shown) of the cylinder 76 to a desired predetermined position.

Then, when the pressure fluid is discharged from the cylinder 76, the pressure fluid reaches the lip of the check valve 20 from the passage formed in the connecting member 31 to bend the lip 72 outwards, Increase the outer diameter and move the check valve 20 to the receiving member 136.

Therefore, the inside of the cylinder 76 communicates with the third passage 150 through the second hole 103, the first passage 146, and the second passage 148. At the same time, the lip 72 of the check valve 20 is pressed toward the inner circumferential wall of the inclined hole 140 of the receiving member 136 to be in close contact with the first sheet portion, whereby the pressure fluid flows into the hole 138. To prevent them. As a result, the pressure fluid does not flow into the solenoid valve. After the pressure fluid flows into the fourth passage through the second hole 130, the first passage 146, the second passage 148, and the third passage, the noise generated in the pressure oil is also applied to the noise member 62. After being removed by the pressure fluid is released into the air in the slit 134.

Moreover, Figure 6 shows a fourth embodiment of the present invention.

In the fourth embodiment, the structures of the same elements as those employed in the third embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The speed controller 160 according to the fourth embodiment basically includes a cylindrical body 164 inserted into the pipe or line joint 162 and a line joint 162 and a needle inserted into the cylindrical body 164. And a check valve displaceable along the axis of the valve body 18 and the line fitting 162.

The first passage 166 is formed coaxially with the cylindrical portion 122a in the second sheet portion 144 of the line joint portion 162. The hole 168 communicates with one end of the first passage 166 in a manner in which both axes are perpendicular to each other. The cylindrical body 164 is inserted into the hole 168 so that the second passage 170 of the cylindrical body 164 communicates with the first passage 166.

In addition, the third passage 172 having a large diameter communicates coaxially with one end of the second passage 170 and is formed in the cylindrical body 164 in the radial direction in the fourth passage 174 and the plurality of slits 134. It communicates with the outside through).

The operation of the speed controller 160 configured as described above according to the fourth embodiment is substantially the same as the operation of the speed controller according to the third embodiment. Operation of the speed controller 16 will be briefly described below.

When a pressure fluid is introduced from the one-touch type joint 32 into the cylindrical portion 122a of the line joint 162 under the action of the solenoid valve not shown, the check valve 20 is seated on the second sheet portion 144. It is moved in the right direction by the input fluid.

Accordingly, the first passage 166 is closed so that the pressure fluid flows into the cylinder 76 through the connecting member 31 to displace the piston (not shown) of the cylinder 76 in a desired direction.

On the other hand, when the pressure oil is discharged from the cylinder 76, the pressure fluid flows into the pressure fluid introduction passage (R) from the passage formed in the connecting member 31 so that the check valve 20 is engaged with the first sheet portion 142. Accordingly, the inside of the cylinder 76 is in communication with the first passage 166 (see the dashed-dotted line in FIG. 6). Therefore, the pressure fluid does not flow into the solenoid valve.

After the pressure fluid is introduced into the fourth passage 174 from the first passage 166, the second passage 170 and the third passage, and after the noise generated in the pressure fluid is removed by the noise member 62, The pressure fluid is released into the air from the slit 134.

Next, a fifth embodiment of the present invention is shown in FIG. 7 and FIG.

In the fifth embodiment, the structures of the same elements as those employed in the fourth embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

The speed controller 200 according to the fifth embodiment has a fixed check valve 202 unlike the speed controllers according to the first to fourth embodiments.

That is, the fixing member 204 is formed on the inner wall of the cylindrical portion 122a of the tub portion or line joint portion 162. The outer circumferential edge of the fixing member 204 is cut at a predetermined angle to form a passage 206 between the inner wall surface of the cylindrical portion 122a and the central portion of the fixing member 204.

The check valve 202 is fixed to one end of the fixed member 204 or integrally formed with the fixed member 204. The lip 208 of the check valve 202 may engage the inner wall surface of the first hole 126 and the sheet portion 210.

The operation of the speed controller 200 constructed as described above according to the fifth embodiment will be briefly described below. The solenoid valve, not shown, is first actuated to introduce pressure fluid from the one-touch type joint 32 into the cylindrical portion 122A of the line joint 162. The lip 208 of the check valve 202 is bent inward by the pressure fluid to reduce the outer diameter of the check valve 202. As a result, the lip 208 is seated on the sheet portion 210 (see FIG. 8). Thus, the first passage 166 is closed to introduce pressure fluid from the passage 206 through the connecting member 31 to the cylinder 76, thereby moving the piston (not shown) of the cylinder 76 to the desired position. Let's do it.

On the other hand, when the pressure fluid is discharged from the cylinder 76, the pressure fluid is introduced into the pressure fluid introduction passage (R) from the passage formed in the connecting member (31). Thus, the lip 208 of the check valve 202 is bent outward to increase the outer diameter of the check valve 202.

Therefore, the lip 208 is separated from the sheet portion 210 to abut against the inner surface of the cylindrical portion 122a, thereby allowing the inside of the cylinder 76 to communicate with the first passage 166 ( See FIG. 7). Therefore, the pressure fluid does not flow into the solenoid valve.

After the pressure fluid flows into the fourth passage through the first passage 166, the second passage 170, and the third passage 172, and after the noise generated from the pressure fluid is removed by the noise member 62. The pressure fluid is discharged into the air from the plurality of slits 134.

As described above, in the fifth embodiment, although the fixed check valve 202 is used, the same operation and effect obtained in each of the other embodiments using the movable check valve 20 or the like can be obtained.

The speed controller of the present invention can obtain the following advantageous effects.

When the pressure fluid is introduced from the first connecting portion, the check valve is in close contact with the sheet portion to close the passage of the body. On the other hand, when the pressure fluid is introduced from the second connecting portion, the check valve is spaced apart from the sheet portion so that the pressure fluid flows from the passage into the needle valve mechanism, thereby releasing the pressure fluid from the speed controller. Water vapor can be prevented from adhering to the pressure fluid introduction passage used for the solenoid valve to communicate with the cylinder.

In addition, the response time of the cylinder can be shortened generally and the arrangement of the device can be improved.

While the present invention has been described fully, it will be apparent to one skilled in the art that numerous changes and modifications can be made without departing from the scope and spirit of the invention described herein.

Claims (9)

A main body having first and second connecting portions communicable with the pressure fluid flow channel formed in the pressure fluid device, a needle valve mechanism provided in a continuous state with a passage formed in the main body, and a pressure fluid from the first connecting portion And a check valve which is firmly fixed on the sheet portion formed in the main body when being introduced to close the communication between the passage and the second connecting portion, wherein the check valve is a pressure fluid connected to the second connecting portion. When introduced from the portion, it is separated from the sheet portion to close the communication between the first connecting portion and the second connecting portion and to discharge the pressure fluid introduced from the second connecting portion through the passage into the needle valve mechanism. Speed controller, characterized in that. The speed controller according to claim 1, wherein the needle valve mechanism has a noise member for removing noise generated from the pressure fluid discharged while controlling the flow ratio of the pressure fluid. The speed controller according to claim 1, wherein the first connection portion is provided coaxially with the needle valve mechanism and the axis of the second connection portion is perpendicular to the axis of the first connection portion. The speed controller according to claim 1, wherein the second connection portion is provided coaxially with the needle valve mechanism and the axis of the second connection portion is perpendicular to the axis of the first connection portion. 2. The check valve of claim 1, wherein the check valve has a valve portion seated on the seat portion formed in the body and the flexible lip is provided with an inner surface of the body when pressure fluid is introduced from the second connecting portion of the body. Speed controller, characterized in that the sliding contact state. 2. The body of claim 1, wherein the main body has a first sheet portion for opening and closing communication between the first and second connection portions, and both passages for communicating a needle valve mechanism and the second connection portion. And a second sheet portion for opening and closing the valve, wherein the check valve is movably disposed along its axis to be seated on the first and second sheet portions. The cylindrical body of claim 6, further comprising a cylindrical body provided coaxially in the main body and a ring-shaped check valve slidably fitted from the outside on an outer circumferential wall of the cylindrical body, wherein the cylindrical body is cylindrical. The first and second seat portions, the passages communicating with the needle valve mechanism and the ring-shaped check valve are formed in the groove portion formed on the outer peripheral wall of the main body and the check valve is seated according to the sliding motion of the ring-shaped check valve. And an opening for allowing the passage to communicate with the second connecting portion when seated on the first sheet portion and for closing the passage when the ring-shaped check valve is seated on the second sheet portion. Speed controller. 7. A speed controller as set forth in claim 6, wherein said main body has a receiving member formed therein including a first sheet portion on which a valve portion of a check valve is seated and an inclined hole into which a lip of the check valve is fitted. . The body of claim 1, wherein the body includes a flexible lip close to the passage formed in the body and close the communication between the second connection portion and the pressure fluid when the pressure fluid is introduced from the first connection portion. Having a fixed check valve disposed therein, wherein the flexible lip is separated from the sheet portion and held in contact with the inner wall surface of the body when a pressure fluid is introduced from the second connecting portion. Speed controller, characterized in that for closing the communication between the first connecting portion and the second connecting portion.