JPH0560253A - Speed controller - Google Patents

Abstract

PURPOSE:To arrest the adhesion of steam in an inlet passage, shorten the response time of a cylinder, and miniaturize the cylinder by releasing the pressure fluid in the cylinder through a speed controller. CONSTITUTION:A cylinder 16 is fitted to a fitting 14, and a needle valve body 18 and a silencer member 62 are fitted to the cylinder 16. A check valve 20 having a rip part 72 and a valve body 74 is engaged with the cylinder 16 in such a manner as to be displaceable. When a pressure fluid flows into a speed controller 10 through a solenoid valve, the valve body 74 is closely adhered to a second sitting part 56 to lead the pressure fluid to a cylinder 76. When the pressure fluid flows from the cylinder 76, the valve body 74 is closely adhered to a first sitting part 12, and the pressure fluid is passed through the needle valve body 18 and released to the atmosphere through the silencer member 62.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed controller, and more particularly to a speed controller in which a check valve which is displaced according to the flow direction of pressure fluid is detachably mounted on a seat portion of a main body.

[0002]

2. Description of the Related Art Conventionally, pneumatic equipment has been widely used to drive and control an object using a pressure fluid, for example, pressure air. In this case, the pneumatic equipment, for example, a cylinder is usually provided with a plurality of ports for inflow and outflow of air. In general, pressure air is introduced into these ports via a speed controller, and a piston arranged inside the cylinder is configured to reciprocate at a predetermined speed by the pressure air. .. In this case, in order to speed up the reciprocating motion of this piston, that is, to shorten the response time of the cylinder and improve work efficiency, the pipes connected to this cylinder, the solenoid valve, and the speed controller are connected to the respective parts in contact with the pressure air. It is effective to increase the effective cross-sectional area to reduce the fluid resistance of the compressed air so that the air can flow smoothly.

[0003]

However, when an attempt is made to increase the effective sectional area of a solenoid valve or the like, the size of each device is inevitably increased, and the setting place is restricted. In particular, this type of device is usually arranged close to each other in order to effectively utilize the narrow space, and it is preferable to make the device as small as possible. Also, when the pressured air flows out from the solenoid valve, the moisture contained in the air is cooled by adiabatic expansion and becomes steam and adheres to the inside of the pipe body, and this steam is used when urging the cylinder in the next step. Is carried into the cylinder by the flow of pressured air, and there is a problem that water gradually accumulates inside the cylinder.

The present invention has been made in order to solve this kind of problem, and achieves further downsizing, shortens the response time of the cylinder, and improves the degree of freedom in the arrangement of the equipment. An object of the present invention is to provide a speed controller capable of preventing pressured air inside from flowing out of the speed controller and adhering moisture generated during discharge to the inside of the pipe body.

[0005]

In order to achieve the above-mentioned object, the present invention provides first and second communication with a passage for pressure fluid.
A main body having a connecting part, a needle valve mechanism connected to a passage defined inside the main body, and a check valve capable of opening and closing a seat provided on the main body,
The check valve is in close contact with the seat when the pressure fluid flows in from the first connecting portion to shut off the passage and the second connection portion, and when the pressure fluid flows in from the second connecting portion. The first connecting portion and the second connecting portion are separated from each other by being separated from the seat portion, and the pressure fluid flowing from the second connecting portion is discharged to the needle valve mechanism through the passage of the main body. To do.

[0006]

In the speed controller according to the present invention, the first
The check valve built in by the inflow of the pressure fluid from the connecting portion closely contacts the seating portion of the main body to close the passage, and allows the pressure fluid to flow from the first connecting portion to the second connecting portion. On the other hand, when the pressure fluid is discharged, the check valve is separated from the seat portion by the pressure of the pressure fluid introduced from the second connecting portion, the second connecting portion communicates with the passage in the main body, and the needle is discharged from this passage. The pressure fluid is discharged into the atmosphere through the valve mechanism. Therefore, the water vapor generated at the time of discharge is captured by the needle valve mechanism and the response time is improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A speed controller according to the present invention will be described in detail below with reference to the accompanying drawings.

1 and 2, reference numeral 10
Shows a speed controller according to the present embodiment. The speed controller 10 includes a pipe joint 14 and a stepped cylindrical body 16 that is integrally fitted to the pipe joint 14.
A needle valve body 18 inserted into the cylindrical body 16 and a check valve 2 that selectively engages with a tip portion of the cylindrical body 16.
It is basically composed of 0 and 0.

The pipe joint 14 has a cylinder whose both ends are open, and a first hole portion 22 serving as a pressure fluid inlet is defined at one end portion (first connecting portion) of the cylinder. The terminal end of the hole 22 has a third hole 26 through a second hole 24 having a small diameter.
Is in communication with. That is, the first seating portion 12 is formed by the annular protrusion 25 that defines the second hole portion 24. The fourth hole portion 28 communicating with the third hole portion 26 has a pipe joint 14
An annular wall portion (second connecting portion) 30 that is defined on the side wall portion of the second wall portion 28 and surrounds the fourth hole portion 28 and projects outwardly is formed. A connecting member 31 is fitted to the annular wall portion 30.

A so-called one-touch joint 32 is inserted into the first hole portion 22. This one-touch joint 32 has a release bush 34 having a plurality of cutouts defined at the bottom.
A collet 40 made of a synthetic resin, a chuck 38 formed of a ring-shaped metal flat plate on the outer periphery of the collet 40, and a seal member 36 formed of an elastic body such as natural rubber or synthetic rubber are provided on the outer periphery of the outer periphery of the collet 40. Is configured.

The cylindrical body 16 is the third hole 2 of the pipe joint 14.
6 is inserted from the open end side. A seal ring 42 is interposed between the inner wall of the pipe joint 14 and the outer peripheral wall of the cylindrical body 16. The cylindrical body 16 has a small-diameter first cylindrical body 44, and the first cylindrical body 44 has a large-diameter second cylindrical body 48 via a step portion 46.
Are integrally connected to. A first passage 50 is defined inside the first cylindrical body 44 along the axis.
The end portion of 0 communicates with the large-diameter second passage 52, and
The second passage 52 is in communication with a plurality of third passages 54a and 54b that are oriented near the terminal end in a direction orthogonal to the axis. The end of the cylinder 16 that defines the first passage 50 becomes a second seat 56 for the check valve 20. Note that reference numeral 58 indicates a valve portion that defines a narrow space with the valve tip portion 64 that constitutes the needle valve body 18.

The needle valve body 18 is fixed by utilizing the stepped portion of the cylindrical body 16 forming the valve portion 58.
And a screw portion 66 is engraved on one end side,
A tapered valve tip 64 is formed on the other end side. A knob member 68 is attached to the terminal end of the screw portion 66. The sound deadening member 62 formed of sintered metal or palm lock abuts on a seal ring 70 fitted to the screw portion 66, and the seal ring 70 is tightened by a lock nut 60.

The check valve 20 has an umbrella-shaped cross section and includes a lip portion 72 and a valve body 74. The check valve 20 is formed of an elastic body such as natural rubber or synthetic rubber, and
Is disposed in the third hole portion 26 between the first seating portion 12 and the second seating portion 56 formed by the annular protrusion 25 so as to be displaceable in the axial direction. In this case, the outer periphery of the lip portion 72 is in contact with the inner wall of the third hole portion 26. On the other hand, the valve body 7
4 has a trapezoidal cross section, and a seat having a diameter larger than the inner diameter of the annular protrusion 25 is formed on one side, and a seat having a diameter substantially the same as the outer diameter of the second seat 56 is formed on the other side. There is.

In the figure, reference numeral 76 indicates a cylinder to which the speed controller 10 is fixed.

Speed controller 10 according to the present embodiment
Is configured as described above, and its operation will be described next.

First, a connecting pipe connected to a solenoid valve (not shown) is inserted into the one-touch joint 32 provided in the first hole 22 of the speed controller 10 in advance, and the connecting member 31 is connected to the port of the cylinder 76. .. further,
By rotating the knob member 68, the distance between the valve tip portion 64 and the valve portion 58 is adjusted. Then, the pressure fluid is fed into the cylinder 76 under the driving operation of the solenoid valve. Therefore, the pressure fluid reaches the second hole portion 24 of the pipe joint 14 from the one-touch joint 32, and the pressure causes the check valve 20 to be displaced to the right side (see FIG. 1), so that the valve body 74 is moved to the second seat portion 56.
In close contact with. At that time, the pressure fluid causes the lip portion 72 of the check valve 20 to bend, and the tip end thereof is separated from the inner peripheral wall defining the third hole portion 26 so that the passage for the connecting member 31 is communicated (see FIG. 1). As a result, the pressure fluid flows into the cylinder 76 through the fourth hole 28 and displaces the piston (not shown) in the cylinder 76 in the arrow A direction.

Next, when the piston is displaced in the direction of arrow B, the pressure fluid in the cylinder 76 must be discharged. At that time, the pressure fluid reaches the third hole 26 from the passage of the connecting member 31 through the fourth hole 28, and the check valve 20 that is in close contact with the second seat 56 of the cylindrical body 16 is shown in FIG.
As shown in FIG. 4, the seat formed on the valve body 74 is moved to the left side and separated, and the seat formed on the valve body 74 is used as the second seat portion 56.
Abut and close. On the other hand, the lip portion 72 of the check valve 20 is also pressed by the pressure fluid in the direction toward the inner peripheral wall of the third hole portion 26, that is, the diameter is increased and the pressure fluid flows toward the second hole portion 24 side. Block (see Figure 2).

As a result, the check valve 20 is displaced toward the second hole portion 24 side by the pressure fluid, and the second hole portion 2 of the pipe joint 14 is displaced.
By closing 4 the third hole 26 and the first passage 50 are in communication. Therefore, the pressure fluid that has flowed into the first passage 50 flows into the second passage 52 from the gap of the valve tip portion 64 of the needle valve body 18. And this second passage 52
After the various noises in the pressure fluid are silenced when passing through the muffling member 62 disposed inside, the third passages 54a, 54b are provided.
Released into the atmosphere.

The pressure fluid in the solenoid valve (not shown), the connecting pipe, and the first hole 22 of the speed controller 10 is discharged into the atmosphere from the discharge port provided in the solenoid valve.

As described above, in this embodiment, when the pressure fluid flows into the cylinder 76 via the speed controller 10, the check valve 20 is moved to the second seat portion 56 of the cylindrical body 16.
The lip portion 72 is bent so as to communicate with the introduction path R. When the pressure fluid is discharged from the cylinder 76, the check valve 20 is separated from the second seat portion 56 and abuts the second hole portion 24 to close the passage to the solenoid valve. Then, the first passage 50 defined in the second seat 56 is formed.
Since the pressure fluid in the cylinder 76 is discharged into the atmosphere through the needle valve main body 18 from the speed controller 10, the pressure fluid in the cylinder 76 can be directly discharged into the atmosphere without passing through the solenoid valve, and the response time of the cylinder 76 can be shortened. Further, water vapor generated by adiabatic expansion is not generated in the third hole portion 26, and therefore water is not accumulated in the cylinder 76.

A second embodiment of the present invention is shown in FIGS. In the second embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

The speed controller 80 includes a pipe joint 82 in which a pressure fluid introduction passage 81 is defined, a cylindrical body 84 integrally fitted to the pipe joint 82, and the cylindrical body 84.
The needle valve body 18 inserted into the valve and the check valve 86 which is displaceable along the axial direction of the speed controller 80.
Basically consists of and.

The pipe joint 82 is a cylindrical body having an L shape, and has a first hole portion 88 into which the one-touch joint 32 is inserted and the first hole portion 88.
A narrow second hole portion 90 communicating with the hole portion 88 and a third hole portion 92 extending in a direction orthogonal to the axis of the second hole portion 90.
Is defined inside.

The cylindrical body 84 is inserted into the third hole portion 92 of the pipe joint 82 via the seal ring 42. The cylindrical body 84 includes a first cylindrical body 94 having a small diameter along the axial direction and a step portion 96.
And a second cylindrical body 98 having a large diameter. First cylinder 9
The narrow outer peripheral portion of 4 is consequently utilized as the recess 100, and the first passage 102 is formed so as to be orthogonal to the recess 100.
Are formed through. Furthermore, the first in relation to the recess 100
A ring-shaped check valve 8 which is displaceable on the outer peripheral wall of the cylinder 94.
6 fits together. In this case, the lip 104 of the check valve 86 is directed outward and expands.

The first passage 102 has a cylindrical body 84.
Communicates with the second passage 108 defined in the first cylindrical body 94 along the axial direction. The third passage 110 communicates with the third passage 110 having a large diameter from the end of the second passage 108, and the third passage 110 communicates with the plurality of fourth passages 112a and 112b via the noise reduction member 62. Second passage 108
The rod-shaped portion 109 of the cylindrical body 84 that defines a narrow space defines a narrow space between the rod-shaped portion 109 and the valve tip portion 64 of the needle valve body 18, and functions as a so-called throttle.

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

When a solenoid valve (not shown) is driven and the pressure fluid flows from the one-touch joint 32 through the second hole portion 90 of the pipe joint 82 into the third hole portion 92, the pressure fluid causes the check valve 86 to be recessed in the cylindrical body 84. The seat 100 is slid downward to sit on the seat 103. Therefore, the valve portion 105 of the check valve 86 closes the first passage 102 defined in the concave portion 100 to cut off the communication between the electromagnetic valve and the needle valve body 18.
On the other hand, the pressure fluid is the lip portion 104 of the check valve 86.
Is reduced, and as a result, the pressure fluid communicates the second hole 90 with the introduction path 81. That is, the pressure fluid reaches the inside of the cylinder 76 through the connecting member 31 and displaces the piston of the cylinder 76 (see FIG. 3).

Next, when the pressure fluid in the cylinder 76 is discharged, the pressure fluid reaches from the passage of the connecting member 31 to the lip portion 104 of the check valve 86, and the lip portion 104.
Is expanded and displaced upward in the recess 100, and the inside of the cylinder 76 and the second passage 108 are communicated with each other via the first passage 102. At that time, the lip 104 of the check valve 86
Is pressed by the pressure fluid in the direction toward the inner peripheral wall of the third hole 92, and prevents the pressure fluid from being introduced into the second hole 90.

As a result, the pressure fluid does not flow to the solenoid valve side, and is silenced by the silencing member 62 from the first passage 102 of the recess 100 through the second passage 108, and then the fourth passage 11 is formed.
It is released to the atmosphere from 2a and 112b.

As described above, in the second embodiment, when the location of the speed controller 80 arranged between the solenoid valve and the cylinder 76 is small, the speed controller 80 is vertically deformed. Applicable.

Next, FIG. 5 shows a third embodiment of the present invention. In the third embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

The speed controller 120 according to the third embodiment has a pipe joint 122, a cylindrical body 124 integrally fitted to the pipe joint 122, a needle valve body 18 inserted into the cylindrical body 124, Basically, the check valve 20 is displaceable along the axial direction of the pipe joint 122.

Elongated cylindrical portion 12 constituting the pipe joint 122
A first hole portion 126 is formed in 2a.
At the end of 26, the ring-shaped groove 128 and the second hole 1 having a small diameter are formed.
30 and coaxially communicate with each other. The second hole portion 130 communicates with the third hole portion 132 formed in the short tubular portion 122b forming the pipe joint 122 by intersecting the axes of the third hole portion 132 with each other, and the opening portion is formed in the third hole portion 132. The ring-shaped groove portion 128 communicates with each other via 133. A plurality of slits 134 are formed in the circumferential direction on the outer circumference of the end of the cylindrical portion 122b within a predetermined angle range, and the slits 134 form a third slit.
The hole 132 is opened to the outside.

The one-touch joint 32 is provided in the first hole 126.
And the receiving member 136 are inserted. This receiving member 136
A narrow hole 138 is formed at the center of the hole 13.
An inclined hole portion 1 corresponding to the shape of the check valve 20 at the end of 8
40 communicate. A first seating portion 142 is provided at a boundary portion between the hole 138 and the inclined hole 140. The outer diameter of the ring-shaped groove portion 128 corresponds to the outer diameter of the check valve 20, and the second seat portion 144 is provided at the boundary portion between the inner end portion of the ring-shaped groove portion 128 and the second hole portion 130. It is provided.

An introduction path R is defined between the tip of the cylindrical body 124 and the connecting member 31, and a first passage 146 communicating with the second hole portion 130 is formed in the cylindrical body 124. The first passage 146 communicates with a second passage 148 formed in the axial direction of the cylindrical body 124.
A large-diameter third passage 150 coaxially communicates with the end of 48. The third passage 150 communicates with a fourth passage 152 formed in the radial direction of the cylindrical body 124.
2 is opened to the outside through the slit 134.

The operation of the speed controller 120 according to the third embodiment configured as described above will be described.

When a solenoid valve (not shown) is driven and the pressure fluid flows from the one-touch joint 32 into the hole 138 of the receiving member 136 mounted on the pipe joint 122, the check valve 20
The pressure fluid causes the inside of the inclined hole portion 140 to move as shown in FIG.
It moves to the center and rightward and sits on the second seat portion 144. Therefore, the valve main body 74 of the check valve 20 closes the second hole 130, and disconnects the communication between the solenoid valve and the needle valve main body 18. On the other hand, the pressure fluid is the lip portion 7 of the check valve 20.
2 is reduced in diameter so that the hole 138 has the groove 128 and the opening 133.
Through the introduction path R. Therefore, the pressure fluid reaches the inside of the cylinder 76 via the connecting member 31,
Displace the piston of No. 6.

Next, when the pressure fluid in the cylinder 76 is discharged, the pressure fluid reaches the lip portion 72 of the check valve 20 from the passage of the connecting member 31, and the lip portion 72 is expanded in diameter to receive the member 136. Displace to the side. Therefore, the second
The inside of the cylinder 76 and the third passage 150 are communicated with each other through the hole 130, the first passage 146, and the second passage 148.
At that time, the lip portion 72 of the check valve 20 is pressed by the pressure fluid in a direction directed to the inner peripheral wall of the inclined hole portion 140 of the receiving member 136 and is brought into close contact with the first seat portion 142, so that the hole portion 1
The introduction of the pressure fluid to 38 is blocked (see the chain double-dashed line in FIG. 5).

As a result, the pressure fluid does not flow to the solenoid valve side, but the second hole portion 130, the first passage 146, and the second passage 148.
Through the third passage 150, the third passage 150, and the fourth passage 152.
Released into the atmosphere.

Furthermore, a fourth embodiment of the present invention is shown in FIG.
Shown in. In the fourth embodiment, the same components as those in the third embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

The speed controller 160 according to the fourth embodiment includes a pipe joint 162, a cylindrical body 164 integrally fitted to the pipe joint 162, a needle valve body 18 inserted into the cylindrical body 164. Basically, the check valve 20 is displaceable along the axial direction of the pipe joint 162.

Second seating portion 144 constituting the pipe joint 162
Is provided with a first passage 166 coaxially with the tubular portion 122a, and a hole portion 168 communicates with the end portion of the first passage 166 with its axis intersecting. The cylindrical body 164 is fitted into the hole portion 168, and the second passage 170 of the cylindrical body 164 is inserted into the first passage 16
6, the third passage 172 having a large diameter is coaxially communicated with the end portion of the second passage 170, and the third passage 172 forms a fourth passage 174 formed in the radial direction of the cylindrical body 164. It is opened outward from the slit 134 through.

The operation of the speed controller 160 according to the fourth embodiment configured as described above is the same as that of the above-described third embodiment.
The speed controller 120 is substantially the same as the speed controller 120 according to the embodiment described above, and will be schematically described below.

Under the driving action of a solenoid valve (not shown), the pressure fluid flows from the one-touch joint 32 to the tubular portion 12 of the pipe joint 162.
When flowing into 2a, the check valve 20 moves to the right by the pressure fluid and seats on the second seat portion 144. Therefore, the first passage 166 is closed and the pressure fluid is
It reaches the inside of the cylinder 76 through the connecting member 31, and the piston of the cylinder 76 is displaced.

On the other hand, when the pressure fluid in the cylinder 76 is discharged, the pressure fluid reaches the introduction passage R from the passage of the connecting member 31, and the check valve 20 engages with the first seat portion 142 so that the inside of the cylinder 76. And the first passage 166 are communicated with each other (see a chain double-dashed line in FIG. 6). Therefore, the pressure fluid does not flow to the solenoid valve side, is silenced by the silencing member 62 via the first passage 166, the second passage 170, the third passage 172 to the fourth passage 174, and then is discharged from the plurality of slits 134 to the atmosphere. Is released to.

Next, a fifth embodiment of the present invention is shown in FIGS. In the fifth embodiment, the same components as those in the fourth embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

The speed controller 200 according to the fifth embodiment is different from the first to fourth embodiments described above.
A fixed check valve 202 is provided. That is, the fixing member 204 is disposed on the inner wall of the tubular portion 122a of the pipe joint 162, and the outer peripheral edge of the fixing member 204 is cut out by a predetermined angle to cut the first hole 12 of the tubular portion 122a.
A passage 206 is defined between the passage 206. The check valve 202 is fixed to or integrally molded with the end of the fixing member 204, and the lip portion 208 of the check valve 202 is engageable with the inner wall surface of the first hole 126 and the seat 210.

The operation of the speed controller 200 according to the fifth embodiment configured as described above will be briefly described below. First, the pressure fluid flows from the one-touch joint 32 to the pipe under the driving action of a solenoid valve (not shown). The lip portion 20 of the check valve 202 flows into the tubular portion 122a of the joint 162.
8 is reduced in diameter by the pressure fluid and seated on the seat portion 210 (see FIG. 8). Therefore, the first passage 166 is closed, and the pressurized fluid reaches the inside of the cylinder 76 from the passage 206 through the connecting member 31 and displaces the piston of the cylinder 76.

On the other hand, when the pressure fluid in the cylinder 76 is discharged, the pressure fluid reaches the introduction passage R from the passage of the connecting member 31 and expands the lip portion 208 of the check valve 202. Therefore, the lip portion 208 separates from the seating portion 210 and abuts on the inner wall surface of the tubular portion 122a, and the cylinder 7
The inside of 6 and the 1st passage 166 are connected (refer to Drawing 7). Therefore, the pressure fluid does not flow to the solenoid valve side and the first passage 16
6, second passage 170, third passage 172 to fourth passage 17
After being silenced by the sound deadening member 62 after passing through 4, the light is emitted to the atmosphere through the plurality of slits 134.

As described above, in the fifth embodiment, even if the fixed type check valve 202 is used, the movable type check valve 2 is used.
It is possible to have the same effect as 0 or the like.

[0051]

According to the speed controller of the present invention, the following effects can be obtained.

When the pressure fluid flows in from the first connecting portion, the check valve comes into close contact with the seat portion to close the passage of the main body, while when the pressure fluid flows in from the second connecting portion, the check valve is separated from the seat portion. Then, the pressure fluid is discharged from the passage to the needle valve mechanism and discharged from the speed controller. As a result, it is possible to prevent water vapor from adhering to the introduction path that connects the solenoid valve and the cylinder, and also reduce the response time of the cylinder as a whole and improve the degree of freedom in arranging the equipment. become.

[Brief description of drawings]

FIG. 1 is an explanatory vertical cross-sectional view of a speed controller according to a first embodiment of the present invention.

FIG. 2 is an explanatory vertical cross-sectional view of the speed controller of FIG. 1 when a pressure fluid is discharged.

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

FIG. 4 is an explanatory longitudinal sectional view of the speed controller of FIG. 3 when discharging a pressure fluid.

FIG. 5 is a vertical cross-sectional explanatory view of a speed controller according to a third embodiment of the present invention.

FIG. 6 is a vertical cross-sectional explanatory view of a speed controller according to a fourth embodiment of the present invention.

FIG. 7 is an explanatory longitudinal sectional view of a speed controller according to a fifth embodiment of the present invention.

FIG. 8 is an operation explanatory diagram of the speed controller of FIG. 7.

[Explanation of symbols]

 10, 80 ... Speed controller 12 ... First seating portion 14, 82 ... Pipe joint 16, 84 ... Cylindrical body 18 ... Needle valve body 20, 86 ... Check valve 22, 88 ... First hole portion 24, 90 ... Second hole Part 26, 92 ... Third hole part 50, 102 ... First passage 52, 108 ... Second passage 72, 104 ... Lip part 76 ... Cylinder 120 ... Speed controller 122 ... Pipe joint 124 ... Cylindrical body 134 ... Slit 136 ... Receiver Member 142 ... 1st seating part 144 ... 2nd seating part 160 ... Speed controller 162 ... Pipe joint 164 ... Cylindrical body 200 ... Speed controller 202 ... Check valve 204 ... Fixing member 206 ... Passage 208 ... Lip part 210 ... Seating part

Claims (2)

[Claims] 1. A main body having first and second connecting portions communicating with a passage for pressure fluid, a needle valve mechanism provided in connection with a passage defined inside the main body, and provided in the main body. And a check valve capable of opening and closing the seat portion, the check valve being in close contact with the seat portion when the pressure fluid flows in from the first connecting portion to shut off the passage and the second connecting portion. When the pressure fluid flows from the second connecting portion, the pressure fluid flowing from the second connecting portion is separated from the seating portion to block the first connecting portion and the second connecting portion, and the pressure fluid flowing from the second connecting portion is passed through the passage of the main body. The speed controller is characterized in that it is released to the needle valve mechanism via. 2. The speed controller according to claim 1, wherein the needle valve mechanism is provided with a muffling member around the tip of the needle valve body that regulates the flow rate of the pressure fluid to be discharged, so that the pressure fluid to be discharged is discharged. A speed controller characterized by muting.