JP4820727B2 - speed controller - Google Patents

Description

  The present invention relates to a speed controller, and more particularly to a speed controller that controls pressure control of a pressure fluid supplied to or discharged from a fluid pressure machine such as a fluid pressure cylinder using a needle valve.

As this type of speed controller, there is a configuration in which the needle valve is moved in the axial direction by rotating an adjustment knob and adjusted to a desired flow rate or flow velocity, and then the needle valve is held at an adjustment position by a fixing nut ( For example, see Patent Document 1.)
JP-A-5-87257

  However, in the configuration of the prior art, after adjusting the needle valve to a desired position by rotating the adjustment knob, the needle valve is adjusted by tightening the needle valve with the fixing nut. It may move in the axial direction from the position. Even if the needle valve does not rotate, the needle valve moves in the axial direction by the backlash of the screw by tightening with the fixing nut. As a result, by tightening with the fixing nut, the actual flow rate or flow rate deviates from the adjusted desired flow rate or flow rate. Even if the amount of movement of the needle valve is in units of 1/100 mm, it is necessary to redo the adjustment if high accuracy that does not allow an error in the flow rate or flow velocity associated therewith is required. There's a problem.

  The present invention has been made in view of the above-described conventional problems, and the purpose thereof is only an operation of rotating the operation portion without requiring tightening and fixing with a fixing nut after adjusting the movement of the needle valve in the axial direction. It is an object of the present invention to provide a speed controller capable of adjusting the position of the needle valve and fixing the needle valve to the adjusted position.

In order to achieve the above object, the invention according to claim 1 is accommodated in a housing in which a flow path communicating with a port is formed, and in a housing portion formed in the housing so as to communicate in the middle of the flow path. And a speed controller main body for adjusting the flow rate of the fluid flowing through the flow path. The speed controller main body is fixed to the housing and has a cylindrical body in which a housing hole composed of a large diameter portion and a small diameter portion that accommodates a needle valve so as to be movable in the axial direction, and a needle in the small diameter portion And a needle valve that is mounted on the body in a relatively non-rotatable manner with the proximal end protruding from the large diameter portion and having a male screw portion formed at the portion protruding from the large diameter portion. In addition, it has a female threaded portion that can be screwed to the male threaded portion, and is attached so as to be relatively rotatable with respect to the body in a state where the female threaded portion is threadedly engaged with the male threaded portion, and not relatively movable in the axial direction. In addition, an operation portion including a plurality of locking portions along the circumferential direction is provided on the outer peripheral portion . A recess is formed around the housing portion of the housing, and a regulation plate having a hole formed through the operation portion and projecting to the outside of the housing is housed in the recess. The restricting plate is provided with a lock member that can be engaged with a part of the plurality of engaging portions to restrict the rotation of the operation portion.

  In this invention, when the operation portion is rotated, the needle valve that cannot rotate relative to the body is moved in the axial direction to adjust the flow rate of the fluid flowing through the flow path. When the rotational force is applied, the operation portion is rotated without moving in the axial direction. However, in the state where the rotational force is not applied, the locking portion is locked by a lock member provided in the housing to restrict the rotation. . Therefore, since the position adjustment of the needle valve is completed simply by rotating the operation section, unlike the conventional technique, the operation section is not required to be tightened and fixed with a fixing nut after adjusting the movement of the needle valve in the axial direction. The needle valve can be fixed at a predetermined position only by rotating the needle valve. In addition, since the operation unit does not move in the axial direction of the needle valve, it is easy to examine the installation space for the speed controller. Furthermore, since the speed controller main body is provided in the housing in which the flow path is formed, the piping work can be simplified when assembled and used in the electromagnetic valve.

  According to a second aspect of the present invention, in the first aspect of the present invention, the operation portion includes a regular N-square cylindrical shape in which at least a portion of the locking portion is configured by a plurality of sets whose surfaces are parallel to each other. (N is an even number of 4 or more), and the lock member is formed of a spring member disposed so as to sandwich two parallel surfaces constituting the locking portion.

  In the present invention, the amount of movement of the needle valve in the axial direction can be adjusted with the amount of movement of the male screw portion in the axial direction when the operating portion is rotated 360 / N degrees as the minimum adjustment amount. Further, since the two parallel surfaces are sandwiched between the spring members of the lock member and the movement is prevented, the needle valve is prevented from being inclined.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the male screw portion and the female screw portion are formed of a left-hand thread. In this invention, the needle valve is moved in the closing direction when the operation portion is rotated in the clockwise direction, and the needle valve is moved in the opening direction when the operation portion is rotated in the counterclockwise direction. Therefore, the flow rate of the speed controller can be adjusted with the same feeling as that of the conventional speed controller.

The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the speed controller body is detachably attached to the housing. According to the present invention, when the speed controller main body breaks down or when the life of packing or the like is reached, the speed controller main body can be removed from the housing for repair or replacement. In general, a speed controller is used in the state of a unit connected to a solenoid valve and in a state where a plurality of units are arranged together. However, since the speed controller body can be removed from the housing, the speed controller There is no need to remove or reassemble the solenoid valve.
The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the port of the flow path formed in the housing includes a fluid supply port to which pressure fluid is supplied. It is connected to a solenoid valve unit provided with a discharge port for discharging the pressure fluid.

  According to the present invention, after adjusting the movement of the needle valve in the axial direction, tightening and fixing with a fixing nut is not required, and only the operation of rotating the operating portion adjusts the position of the needle valve and fixes it to the adjusted position. Can be made possible.

Hereinafter, an embodiment in which the present invention is embodied in a speed controller suitable for controlling a fluid pressure cylinder will be described with reference to FIGS.
As shown in FIG. 1, the speed controller 10 includes a housing 11 and two speed controller bodies 20 that are detachably attached to the housing 11. The housing 11 is formed with two channels 12 and 13 communicating with the ports 12a, 12b, 13a and 13b. The speed controller main body 20 is detachably attached to the housing parts 14 and 15 formed in the housing 11 so as to communicate with the flow paths 12 and 13 in order to adjust the flow rate of the fluid flowing through the flow paths 12 and 13. Contained as possible. The accommodating portions 14 and 15 are formed with small diameter portions 14a and 15a on the distal end side (bottom portion side), and the flow paths 12 and 13 include the distal ends (bottom portions) of the small diameter portions 14a and 15a and the small diameter portions 14a and 15a. It is formed so as to communicate with the proximal end peripheral surface. Further, the large diameter portion is formed such that the portion near the small diameter portion is slightly smaller in diameter. This is to avoid excessive friction of the seal ring when the body 23 described later is accommodated in 14, 15 with the seal ring fitted to the outer periphery thereof.

  In FIG. 1, the axes of the two speed controller bodies 20 are illustrated on the same plane including the flow path 12 for convenience. However, in actuality, both the flow paths 12 and 13 exist at positions shifted in the direction perpendicular to the paper surface of FIG. 1 so that the both flow paths 12 and 13 do not interfere with each other, and the speed controller communicates with the flow path 13 indicated by a two-dot chain line. The main body 20 exists at a position shifted in a direction perpendicular to the paper surface of FIG.

  As shown in FIG. 3 (a), the speed controller main body 20 has a cylindrical body in which an accommodation hole 22 composed of a large diameter portion 22a and a small diameter portion 22b for accommodating the needle valve 21 so as to be movable in the axial direction is formed. 23. The large diameter portion 22a is formed to a size that allows the main body portion 21a of the needle valve 21 to be loosely inserted, and the small diameter portion 22b is formed to be a size that allows the needle portion 21b of the needle valve 21 to be loosely inserted. A surface corresponding to the boundary between the large-diameter portion 22a and the small-diameter portion 22b constitutes the seat portion 22c, and a plurality of holes 22d that allow the large-diameter portion 22a to communicate with the outside are formed near the seat portion 22c.

  The body 23 has a small-diameter portion 23b formed on the distal end side with an intermediate portion 23a having a diameter that can be loosely inserted into the large-diameter portions of the accommodating portions 14 and 15, and the proximal end side of the intermediate portion 23a is larger in diameter than the small-diameter portion 23b. Is formed. The small-diameter portion 23b is formed in a size having a gap through which fluid flows without hindrance between the peripheral surfaces of the small-diameter portions 14a and 15a of the accommodating portions 14 and 15, and the small-diameter portion 22b and the hole 22d of the accommodating hole 22 are small-diameter portions. 23b. An accommodating groove 23c is formed in an annular shape on the outer periphery near the tip of the small diameter portion 23b, and a packing 24 is accommodated in the accommodating groove 23c. An accommodation groove 23d is also formed in an annular shape on the outer periphery of the intermediate portion 23a, and a seal ring 25a is accommodated in the accommodation groove 23d.

  The needle valve 21 includes a main body portion 21a that can move in the axial direction in the large-diameter portion 22a of the accommodation hole 22, a needle portion 21b that is fixed to the distal end of the main body portion 21a and is formed in a tapered shape. And a male screw portion 21c formed on the base end side of the main body portion 21a. The male screw portion 21 c is formed with a larger diameter than the main body portion 21 a, and the needle valve 21 is accommodated in the accommodation hole 22 in a state where the male screw portion 21 c protrudes from the accommodation hole 22. The male screw portion 21c is formed of a left screw. As shown in FIG. 3B, the main body portion 21a is formed in a cross-sectional shape having two flat surfaces 26 whose intermediate portions are parallel to each other. The body 23 is fixed with two restricting pins 27 that engage with the two flat surfaces 26 and prevent the needle valve 21 from rotating. The restriction pin 27 has a circular cross section. That is, the needle valve 21 is attached to the body 23 so as to be movable in the axial direction in a state in which the needle valve 21 is not relatively rotatable. Further, an annular groove 21d is formed in the main body 21a of the needle valve 21 on the tip side from the flat surface 26, and a seal ring 25b for preventing pressure fluid from leaking from the gap between the main body 21a and the body 23 in the annular groove 21d. Is housed.

  The base 23 of the body 23 is formed with three stepped portions 28, and the operation portion 29 having a cylindrical engaging portion 29 a that can be engaged with the stepped portion 28 is engaged with the engaging portion 29 a with the stepped portion 28. It is provided so that it can rotate in the combined state. As shown in FIG. 2, the operation portion 29 is formed into a regular octagonal cylindrical shape, each of the eight surfaces constitutes a locking portion 29 b, and there are four sets of two parallel surfaces. That is, the operation unit 29 includes a plurality of locking portions 29b on the outer peripheral portion along the circumferential direction. In the operation portion 29, a female screw portion 30 that is screwed into the male screw portion 21c of the needle valve 21 is formed with a left-hand screw. The operating portion 29 is formed with a locking groove 31 on the side opposite to the engaging portion 29a for locking a driver as an operating tool for rotating the operating portion 29.

  As shown in FIG. 1, the speed controller main body 20 configured as described above is in a state where the distal end of the intermediate portion 23 a of the body 23 is in contact with the position corresponding to the proximal ends of the small diameter portions 14 a and 15 a and the housing 11 The housing 23 is attached to the housing 11 in a state in which the body 23 is accommodated on the back side of the accommodating portions 14 and 15. On the front side (upper side in FIG. 1) of the accommodating parts 14, 15, a regulation cylinder 32 that regulates the movement of the operation part 29 in the axial direction is provided at the distal end of the regulation cylinder 32 (lower end in FIG. 1). It is accommodated in a state in which it engages with the engagement portion 29a of 29 and is loosely fitted outside the polygonal cylinder portion of the operation portion 29. The housing 11 is formed with a recess 11a around the receiving portions 14 and 15. The recess 11a receives a restriction plate 33 for restricting the movement of the restriction tube 32 in the axial direction, and is attached to the housing 11 by a screw 11b. It is fixed. A packing 34 is interposed between the regulation plate 33 and the regulation cylinder 32. In addition, a hole 33 a through which the engaging portion 29 a of the operation portion 29 passes is formed in the restriction plate 33, and the operation portion 29 protrudes outside the housing 11 through the hole 33 a.

  As shown in FIG. 2, a recess 33 b having a width slightly wider than the outer diameter of the body 23 is formed on the surface of the restriction plate 33 opposite to the side facing the restriction cylinder 32. The recess 33b is formed in a planar rectangular shape, and a hole 33a is formed in the center of the recess 33b. The recess 33 b is provided with a lock member 35 that is engaged with a part of the plurality of engaging portions 29 b of the operating portion 29 and prevents the operating portion 29 from rotating. The lock member 35 is formed by bending a linear spring material so that a linear portion 35a that contacts the end face of the recess 33b is present on both ends, and a linear portion 35b that contacts the locking portion 29b is present in the center portion. Is formed. Two lock members 35 are provided so as to come into contact with one set of locking portions 29 b of the operation portion 29.

  Further, in the housing 11, a joint 36 for connecting a pipe for connecting the speed controller 10 to the fluid pressure cylinder is fixed to the ports 12 a and 13 a of the flow paths 12 and 13. The joint 36 includes a known one-touch joint mechanism. Further, when the speed controller 10 is used by being connected to the solenoid valve unit 40 as shown in FIG. 4, a joint 41 provided in the solenoid valve unit 40 is attached to the ports 12b and 13b. ing.

  Next, the operation when the speed controller 10 configured as described above is assembled to the solenoid valve unit 40 and used for controlling an air cylinder as a fluid pressure cylinder will be described. As shown in FIG. 4, the speed controller 10 is connected to the solenoid valve unit 40 by attaching the joint 41 of the solenoid valve unit 40 to the ports 12b and 13b. Further, pipes 47 and 48 (shown in FIG. 5) for connecting the speed controller 10 to the air cylinder are connected to the joint 36 of the speed controller 10.

  FIG. 5 shows a connection diagram of the solenoid valve unit 40, the speed controller 10 and the air cylinder 42 as a circuit diagram. As shown in FIG. 5, the solenoid valve unit 40 includes a fluid supply port 43 to which pressure fluid (compressed air) is supplied and two discharge ports 44 that discharge the pressure fluid discharged from the air cylinder 42. Is provided. A pressure fluid supplied from a fluid supply port 43 connected to a compressed air source such as a compressor (not shown) is supplied from the A port 45 or the B port 46 to the speed controller 10 through the fluid passage, and then the air cylinder 42. Are introduced into the fluid pressure supply chambers 42a and 42b defined by the piston 49 through pipes 47 and 48, respectively. For example, when the piston rod 49a is moved to the immersive side, as shown in FIG. 5, the pressure fluid is supplied from the A port 45 to the fluid pressure supply chamber 42a on the rod side partitioned by the piston 49, and the fluid on the head side The spool 40 a is disposed at a position where the pressure fluid in the pressure supply chamber 42 b is discharged through the B port 46. When the piston rod 49a is moved to the projecting side, the pressure fluid is supplied from the B port 46 to the fluid pressure supply chamber 42b on the head side, and the pressure fluid in the fluid pressure supply chamber 42a on the rod side passes through the A port 45. The spool 40a is arranged at the position where it is discharged, that is, the position moved to the left side from the state of FIG. The flow rate or flow rate of the pressure fluid supplied to the air cylinder 42 and the pressure fluid discharged from the air cylinder 42 is adjusted by the speed controller body 20.

  In the speed controller 10, when the operation portion 29 is rotated against the spring force of the lock member 35, the corner portion of the locking portion 29 b widens the interval between the linear portions 35 b of the pair of lock members 35 to a predetermined angle. After being rotated (45 degrees), the next set of locking portions 29b comes into contact with the set of linear portions 35b. That is, the operation unit 29 is rotated in a state where the rotation is intermittently restricted by 45 degrees. Since the operation unit 29 is rotated in a state in which movement in the axial direction is restricted, the needle valve 21 is connected via a male screw portion 21c that is screwed with the female screw portion 30 as the operation unit 29 rotates. It is moved intermittently in the axial direction by a predetermined amount. The minimum movement amount of the needle valve 21 is N / 360 (N = 8 in this embodiment) of the pitch of the male screw portion 21c and the female screw portion 30.

  In this embodiment, since the male screw portion 21c and the female screw portion 30 are formed as left-hand threads, the needle valve 21 is moved in the closing direction, that is, in the direction of decreasing the flow rate when the operation portion 29 is rotated in the clockwise direction. . Further, when the operation unit 29 is rotated counterclockwise, the needle valve 21 is moved in the opening direction, that is, in the direction of increasing the flow rate. This operation direction is the same as the rotation direction of the adjustment knob of the conventional speed controller.

According to this embodiment, the following effects can be obtained.
(1) The speed controller main body 20 includes a cylindrical body 23 in which an accommodation hole 22 including a large diameter portion 22a and a small diameter portion 22b that accommodate the needle valve 21 so as to be movable in the axial direction is formed. The needle valve 21 is attached to the body 23 in a state in which the needle portion 21b is inserted into the small-diameter portion 22b and the proximal end protrudes from the large-diameter portion 22a, and is relatively non-rotatable. A portion 21c is formed. The speed controller main body 20 is attached so as to be relatively rotatable with respect to the body 23 in a state in which the female screw portion 30 is screwed to the male screw portion 21c, and to be relatively unmovable in the axial direction. An operation unit 29 including a plurality of 29b along the circumferential direction is provided. The speed controller main body 20 is attached to the housing 11 in which the flow paths 12 and 13 communicating with the ports 12a, 12b, 13a and 13b are formed so that the flow rate of the fluid flowing through the flow paths 12 and 13 can be adjusted. The housing 11 is provided with a lock member 35 that can be locked with a part of the plurality of locking portions 29b to restrict the rotation of the operation portion 29. Therefore, since the position adjustment of the needle valve 21 is completed only by rotating the operation portion 29, unlike the prior art, it is not necessary to tighten and fix with a fixing nut after adjusting the movement of the needle valve 21 in the axial direction. The needle valve 21 can be fixed at a predetermined position after the position adjustment only by rotating the operation portion 29. Further, even if the operation unit 29 is operated, the operation unit 29 does not move in the axial direction of the needle valve 21, so that it becomes easy to examine the installation space for the speed controller 10. Furthermore, since the speed controller main body 20 is provided in the housing 11 in which the flow paths 12 and 13 are formed, piping work can be simplified when assembled and used in an electromagnetic valve (electromagnetic valve unit 40).

  (2) The operation portion 29 has a regular N-square cylindrical shape (N is an even number of 4 or more and 8 in this embodiment) in which at least the portion of the locking portion 29b is configured by a plurality of sets of surfaces whose outer shapes are parallel to each other. The lock member 35 is formed by a spring member that is disposed so as to sandwich two parallel surfaces constituting the locking portion 29b. Therefore, the amount of movement of the needle valve 21 in the axial direction can be adjusted with the amount of movement of the male screw portion 21c in the axial direction when the operating portion 29 is rotated 45 degrees as the minimum adjustment amount. Further, since the two parallel surfaces are sandwiched between the spring members of the lock member 35 and the movement is prevented, the needle valve 21 is prevented from being inclined.

  (3) Since the male screw portion 21c and the female screw portion 30 are formed of left-hand screws, the needle valve 21 is moved in the closing direction when the operation portion 29 is turned in the clockwise direction, and the needle valve 21 is turned in the counterclockwise direction. Is moved in the opening direction. Therefore, the flow rate of the speed controller 10 can be adjusted with the same feeling as that of the conventional speed controller.

  (4) The speed controller body 20 is detachably attached to the housing 11. Therefore, when the speed controller main body 20 breaks down or the life of the packing 34 or the like is reached, the speed controller main body 20 can be removed from the housing 11 for repair or replacement. In general, the speed controller is often used in the state of a unit connected to a solenoid valve and a plurality of such units arranged in contact with each other. However, the speed controller body 20 may be removed from the housing 11. Therefore, there is no need to remove the speed controller 10 from the solenoid valve or reassemble it. If the speed controller body 20 is not detachable from the housing 11, the entire speed controller 10 must be replaced with a new one when the packing 34 reaches the end of its life. Therefore, this can be dealt with by replacing the packing 34.

  (5) As a non-rotating structure that makes the needle valve 21 unrotatable and movable in the axial direction, two planes 26 parallel to the intermediate portion of the needle valve 21 are formed, and the body 23 has two planes. In order to prevent the needle valve 21 from rotating by engaging with the pin 26, two restriction pins 27 having a circular cross section are fixed. Therefore, with a simple configuration, the needle valve 21 is prevented from rotating, and the frictional resistance between the regulation pin 27 and the flat surface 26 during movement in the axial direction is reduced.

(6) The speed controller 10 includes two speed controller bodies 20. Therefore, it is suitable for flow control of a double acting cylinder as a fluid pressure machine.
The embodiment is not limited to the above, and may be configured as follows, for example.

  ○ The operation portion 29 is parallel if at least the portion of the locking portion 29b is formed in a regular N-square tube shape (N is an even number of 4 or more) formed of a plurality of sets whose outer shapes are parallel to each other. With the configuration in which the locking portions 29b, which are a set of flat surfaces, are pressed against each other by the parallel linear portions 35b of the set of locking members 35 configured by linear spring members, the operation portion 29 can be rotated when not operated. Can be regulated. Therefore, it is not limited to a regular octagonal cylinder, but may be a regular square cylinder, a regular hexagonal cylinder, a regular decagonal cylinder, or the like.

  ○ The rotation of the operation unit 29 is regulated by arranging a pair of lock members 35 so that the linear portions 35b are parallel to each other, and simultaneously pressing the two planes of the locking portions 29b with the linear portions 35b. Not exclusively. For example, the locking portion 29b is press-contacted by the linear portion 35b of one locking member 35, or the locking portions 29b are arranged by the plurality of locking members 35 arranged in a state where the linear portions 35b are not parallel. It may be configured to be in pressure contact.

  ○ In the case of a configuration in which the plurality of locking portions 29b are press-contacted by a plurality of locking members 35 arranged in a state in which the linear portions 35b are not parallel, the shape of the operation portion 29 is a regular M square cylinder (M is 4 or more) (Integer). That is, it may be a regular pentagonal cylinder, a regular heptagonal cylinder, a regular nine-cornered cylinder, or the like in which the number of the engaging portions 29b is an odd number.

  ○ The configuration for restricting the rotation (turning) of the operation unit 29 when the operation unit 29 is not operated is that the locking unit 29b formed by the outer peripheral surface of a regular M square tube (M is an integer of 4 or more) It is not restricted to the structure which press-contacts by the linear part 35b of the lock member 35 comprised with a shape-like spring member. For example, as shown in FIG. 6A, the operation portion 29 is configured by a cylindrical body having a knurl 50 formed on the outer peripheral portion, and each convex portion 50a of the knurl 50 is defined as a locking portion 29b. The lock member 35 has a shape having a bent portion 35c that can be brought into contact with two adjacent locking portions 29b simultaneously. Also in this case, the rotation of the operation unit 29 is restricted by the lock member 35.

  The lock member 35 that comes into contact with the planar locking portion 29b at the linear portion 35b does not need to match the number of the locking portions 29b to be locked. For example, as shown in FIG. It is good also as a structure which can be contact | abutted to the two latching | locking parts 29b at the same time bent in the shape. In this case, the number of parts is reduced, and the labor for assembling the lock member 35 is also halved.

  The male screw portion 21c and the female screw portion 30 may be right-hand screws instead of left-hand screws. However, in the case of a right-hand screw, the left-hand screw is preferable because the turning direction when operating the operation unit 29 is opposite to that of a conventional speed controller.

  The operation unit 29 is not limited to the configuration provided with the locking groove 31 that locks a flathead screwdriver as an operation tool for rotating the operation unit 29. It is good also as a structure provided with the convex part of the quadratic prism and hexagonal column shape which can be rotated by.

  The speed controller 10 is not limited to the housing 11 provided with a plurality of speed controller main bodies 20, and may be one provided with one speed controller main body 20.

In place of the configuration in which the lock member 35 is supported on the restriction plate 33, another member that supports the lock member 35 may be provided.
The restriction pin 27 is not limited to a circular cross-sectional shape, and may be, for example, a polygon such as a quadrangle or a hexagon, or an ellipse.

  In the configuration in which the needle valve 21 is supported by the restriction pin 27 so as not to rotate relative to the body 23 and to be movable in the axial direction, the shape of the intermediate portion of the needle valve 21 is at least one set of parallel planes. For example, the cross-sectional shape may be a square or a hexagon.

  The structure for supporting the needle valve 21 so as not to rotate relative to the body 23 and to be movable in the axial direction has a shape in which the needle valve 21 is provided with a pair of parallel planes in the middle thereof, and The configuration is not limited to the configuration in which the pair of restriction pins 27 are in contact with the parallel plane. For example, as shown in FIGS. 7A and 7B, a groove 37 extending in the axial direction is formed in the main body 21 a of the needle valve 21. Further, a hole 38 having a diameter the same as the width of the groove 37 is formed in the body 23 so as to extend in the radial direction. Then, the guide pin 39 is fitted and fixed to the hole 38 from the outside of the body 23 with its tip inserted into the groove 37. Even with this configuration, the needle valve 21 can be supported with a simple configuration so that the needle valve 21 cannot rotate relative to the body 23 and can move in the axial direction. Instead of the groove 37, a long hole may be formed in the main body portion 21a.

  The locking member constituting the rotation preventing structure of the operation unit 29 is not limited to the linear spring member formed separately from the regulating plate 33, and the locking member may be formed to be constant with the regulating plate 33. For example, as illustrated in FIG. 8, a pair of linear spring portions 61 that can be fitted to the locking portions 29 b of the operation portion 29 that are parallel to each other are provided on the restriction plate 33 as a lock member. More specifically, a long hole 62 having a width slightly shorter than the distance of the parallel engaging portions 29 b is provided, and a long hole 63 is formed outside the long hole 62 in parallel with the long hole 62. The portion existing between the long hole 63 and the long hole 63 is referred to as a spring portion 61. In this embodiment, the locking groove 31 is formed in a shape capable of locking a plus driver as an operating tool for rotating the operation portion 29. Also in this case, when the operation part 29 is not operated, the locking part 29b is locked by the pair of spring parts 61 and is held in a state where the rotation is restricted. When the driver is locked in the locking groove 31 and the operation portion 29 is rotated, the operation portion 29 rotates against the urging force of the spring portion 61 in a state where movement in the axial direction is restricted. Moved. In this configuration, after the lock member 35 is formed separately from the regulating plate 33, the number of parts is reduced and the number of assembling steps is reduced as compared with the configuration in which the locking member 35 is assembled to the regulating plate 33.

  In the structure which forms the spring part 61 integrally with the control plate 33 as a locking member, the number and position of the spring part 61 are not restricted to what is shown in FIG. For example, the spring part 61 may be formed at a position where it can be fitted with two locking parts 29b that are not parallel, or only one spring part 61 may be provided.

The following technical idea (invention) can be understood from the embodiment.
In the invention described in claim 4, two speed controller bodies are provided.

Sectional drawing of a speed controller. The top view which shows the rotation prevention structure of an operation part. (A) is sectional drawing of a speed controller main body, (b) is the sectional view on the AA line of (a). The partially broken side view of the solenoid valve to which the speed controller was attached. The circuit diagram which shows the connection relation of a solenoid valve unit and a fluid pressure cylinder. (A), (b) is a top view which shows the rotation prevention structure of the operation part in another embodiment. (A) is sectional drawing of another embodiment from which the rotation prevention structure of a needle valve differs, (b) is the BB sectional drawing of (a). The top view which shows the rotation prevention structure of the operation part in another embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Housing, 12, 13 ... Flow path, 12a, 12b, 13a, 13b ... Port, 20 ... Speed controller main body, 21 ... Needle valve, 21b ... Needle part, 21c ... Male screw part, 22 ... Housing hole, 22a ... Large Diameter part, 23b ... Small diameter part, 23 ... Body, 29 ... Operation part, 29b ... Locking part, 30 ... Female thread part, 35 ... Lock member, 61 ... Spring part as a lock member.

Claims (5)

A housing flow passage communicating with the port is formed, and the speed controller body for adjusting the flow rate of the fluid flowing through the flow channel the received in the receiving section formed in the housing so as to communicate with the middle of the channel With
The speed controller body is
A cylindrical body fixed to the housing and formed with an accommodation hole composed of a large diameter portion and a small diameter portion for accommodating the needle valve so as to be movable in the axial direction;
A needle valve in which a needle portion is inserted into the small diameter portion and a base end side protrudes from the large diameter portion so as not to rotate relative to the body, and a male screw portion is formed on a portion protruding from the large diameter portion ,
A female screw part that can be screwed to the male screw part, and is attached to the body screw part so as to be relatively rotatable with respect to the body in a state of being screwed to the male screw part and not to be relatively movable in the axial direction. An operation portion provided with a plurality of locking portions along the circumferential direction on the outer peripheral portion,
A concave portion is formed around the housing portion of the housing, and a regulating plate in which a hole for penetrating the operation portion to project outside the housing is accommodated in the concave portion, and the restriction A speed controller, wherein the plate is provided with a lock member that can be locked with a part of the plurality of locking portions to restrict rotation of the operation portion.   The operation portion is formed in a regular N-square cylindrical shape (N is an even number of 4 or more) in which at least a portion of the locking portion is configured by a plurality of sets whose surfaces are parallel to each other. The speed controller according to claim 1, comprising a spring member disposed so as to sandwich two parallel surfaces constituting the stopper.   The speed controller according to claim 1, wherein the male screw portion and the female screw portion are formed of a left-hand screw.   The speed controller according to any one of claims 1 to 3, wherein the speed controller body is detachably attached to the housing.   5. The port of the flow path formed in the housing is connected to an electromagnetic valve unit provided with a fluid supply port to which a pressure fluid is supplied and a discharge port for discharging the pressure fluid. The speed controller as described in any one of.

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