JP3207208U - Switching valve - Google Patents

Abstract

The position of a valve body can be detected by compressed air, and the air can be used as a driving force for a fluid pressure device, and can be selectively used depending on the situation. Providing a simple switching valve. A first valve unit that switches a first fluid flow path including a plurality of main ports and a second fluid flow path that switches a second fluid flow path including a plurality of subports blocked from the first fluid flow path. The main valve chamber 12 with which each main port communicates, the main valve body 13 that is housed in the main valve chamber and switches the connection state between the main ports, A valve drive unit for driving the main valve body, and the second valve unit switches the connection state between the sub-ports housed in the sub-valve chambers and the sub-valve chambers 32 communicating with the sub-ports The main valve chamber and the sub-valve chamber, and the main valve body and the sub-valve body are arranged on the same axis L line, and the main valve body and the sub-valve body are synchronized with each other. Thus, the switching operation is continued. [Selection] Figure 2

Description

  The present invention relates to a switching valve for switching a connection state between a plurality of ports communicating with the valve chamber by displacing a valve body accommodated in the valve chamber.

  2. Description of the Related Art Conventionally, a switching valve that switches a connection state between a plurality of ports communicating with a valve chamber by displacing a valve body housed in the valve chamber is well known. For example, Patent Document 1 discloses a switching valve having a valve chamber formed inside a valve body, a valve body accommodated in the valve chamber, and a plurality of input / output ports communicating with the valve chamber. ing. The switching valve moves the valve body along the axial direction of the valve chamber by applying pilot air for driving the piston to pistons provided at both ends of the valve body. As the valve element moves, the connection state between the ports is switched, and compressed air is supplied to and discharged from the fluid pressure device connected to the output port.

Some switching valves of this type are provided with a position detection mechanism for detecting the switching position of the valve body, such as that described in Patent Document 2. The switching valve described in Patent Document 2 includes a piston joined to a valve body, a magnet embedded in the piston, a magnetic sensor provided around the piston chamber, and a change in resistance of the magnetic sensor as an electric signal. A switching circuit incorporated in the switching valve, the magnet moving with the valve body is detected by the magnetic sensor, and the switching position of the valve body based on the electrical signal converted by the switching circuit Is configured to detect.
However, for example, in an environment that dislikes electricity and static electricity, it is not preferable to detect the position of the valve body using electricity, such as the switching valve described in Patent Document 2. Therefore, in order to detect the position of the valve body in such an environment, it is desirable to use air. In that case, for example, the air is sent to a display device such as an indicator that operates by air pressure, and the display is performed. The position of the valve body can be detected based on the display state of the device. On the other hand, it is more desirable not to use the air only for detecting the position of the valve body, but to use it as, for example, a driving force of an actuator or selectively use it depending on the situation.

JP 2014-228081 A JP 2003-74742 A

  Therefore, the technical problem of the present invention is that not only can the position of the valve body be detected by compressed air, but the air can also be used as the driving force of the fluid pressure device. Another object of the present invention is to provide a switching valve that can be used in a practical manner.

  In order to solve the above-described problem, a switching valve according to the present invention includes a first valve section that switches a first fluid flow path including a plurality of main ports, and a plurality of subports that are blocked from the first fluid flow paths. A second valve portion that switches the second fluid flow path, and the first valve portion and the second valve portion are disposed on one end side and the other end side of the valve body, and the first valve portion is A main valve chamber that communicates with each main port, a main valve body that is housed in the main valve chamber and switches a connection state between the main ports, and a valve drive unit that drives the main valve body, and a second valve unit Has a sub-valve chamber that each sub-port communicates with, and a sub-valve body that is accommodated in the sub-valve chamber and switches a connection state between the sub-ports, and the main valve chamber, the sub-valve chamber, and the main valve body, The sub-valve elements are respectively arranged on the same axis, and the main valve element and the sub-valve element are connected so as to perform a switching operation synchronously. .

  In the switching valve, preferably, the first valve portion is a two-position valve having a main valve body having a first switching position and a second switching position, and the second valve portion has a sub-valve body having a first switching position. A two-position valve having a position and a second switching position, and a two-port valve having two ports, a sub-input port and a sub-output port.

  At this time, the main valve body and the sub-valve body are driven by the valve drive unit when moving from the first switching position to the second switching position, and are returned when moving from the second switching position to the first switching position. It may be driven by a spring.

Moreover, the valve rod extended in the said axial direction may be interposed between the main valve body and the subvalve body, and the main valve body and the subvalve body may be connected by this valve rod.
At this time, an open passage is formed in the valve rod, and it is more preferable that the open passage communicates with the sub-output port and the atmosphere open port connected to the atmosphere.

  As described above, according to the switching valve according to the present invention, the first valve section that switches the first fluid flow path composed of the plurality of main ports and the first fluid flow path are blocked, and the plurality of sub-ports And a second valve section for switching the second fluid flow path, and the flow path switching operation is performed by synchronizing the valve bodies of the first and second valve sections. For this reason, it is possible to detect the switching position of the main valve body of the first valve portion using the air output from the subport in the second valve portion, Not only can it be used for position detection, but it can also be used as a drive source for other actuators different from the main valve section, or the air output from the second valve section can be selectively used according to the situation. Become.

1 is an external perspective view showing an embodiment of a switching valve according to the present invention. It is a cross-sectional view which shows the switching state when a valve drive part will be in an OFF state. FIG. 3 is a schematic partially enlarged view showing a region A surrounded by a one-dot chain line in FIG. 2. It is a cross-sectional view which shows the switching state when a valve drive part will be in an ON state. FIG. 5 is a schematic partial enlarged view showing a region B surrounded by an alternate long and short dash line in FIG. 4. FIG. 2 is a schematic exploded perspective view of FIG. 1.

  1 to 6 show an embodiment of a switching valve according to the present invention. As shown in FIG. 1, the switching valve 1 according to the present invention is configured such that the first valve section 10 that switches the first fluid flow path through which the compressed air flows and the first fluid flow path are shut off, and the compressed air is also used. And a second valve part 30 for switching the second fluid flow path through which the gas flows. The first valve portion 10 and the second valve portion 30 are arranged side by side on one end side and the other end side in the axis L direction of the valve body 2.

  As shown in FIG. 2 or FIG. 4, the first valve unit 10 includes a main valve unit 3 and a valve drive unit 20. As can be seen from FIG. 1, FIG. 2 or FIG. 6, the main valve portion 3 includes a housing 11 having a rectangular cross-sectional shape, and a circular hole shape extending along the axis L direction inside the housing 11. And a main valve body 13 accommodated in the main valve chamber 12. The main valve body 13 has a spool shape, and a valve portion 14 is formed at a substantially central position in the axis L direction. The valve portion 14 of the main valve body 13 is formed of, for example, an annular sealing material made of synthetic rubber or the like, and the diameter thereof is larger than the shaft diameters of both end portions 13a and 13b of the main valve body 13. . In addition, annular seal members 15 are attached to both end portions 13a and 13b of the main valve body 13, respectively. Reference numeral 6 in FIG. 1 denotes an attachment hole for inserting a fixing tool such as a bolt and attaching the switching valve 1 to a fluid supply member such as a manifold base.

  As shown in FIGS. 2 and 4, the main valve chamber 12 includes one main input port P <b> 1 that opens to the outer surface of the housing 11, one main output port A <b> 1, and one main discharge port R <b> 1. Communicate. Of these main ports, the main output port A1 is provided in the approximate center in the axis L direction of the housing 11, and the main input port P1 and the main discharge port R1 sandwich the main output port A1. It is provided on both sides in the axis L direction. The first fluid flow path in the switching valve 1 of the present embodiment includes these three ports.

As shown in FIG. 2 or FIG. 4, in the main valve chamber 12, in order to hold the main valve body 13 slidably, two cylindrical first and second sleeves 16, 17 are provided. Are mounted side by side in the direction of the axis L.
Of these sleeves 15, 16, the first sleeve 16 is disposed on one open end side (the main discharge port R 1 side) of the main valve chamber 12, and the second sleeve 17 is the other end of the main valve chamber 12. Are arranged on the open end side (the main input port P1 side). A seal member 18 such as an O-ring is attached to the outer peripheral surfaces of the sleeves 16 and 17 so that the airtightness in the main valve chamber 12 is maintained. In the present embodiment, both end portions 13a and 13b of the main valve body are in sliding contact with the inner peripheral surfaces of the sleeves 16 and 17.

  The sleeves 16 and 17 are provided with through holes 16a and 17a communicating with the internal space of the sleeve, and the internal space of the first sleeve 16 is connected to the main discharge port R1 and the main discharge port 16a through the through hole 16a of the sleeve 16. The internal space of the second sleeve 17 communicates with the main supply port P1 and the main output port A1 through the through hole 17a of the sleeve 17 and communicates with the output port A1. In addition, annular first and second main valve seats 16b and 17b are provided at the ends of the sleeves 16 and 17 facing in the axis L direction. .

  As shown in FIG. 2 or 4, the valve drive unit 20 includes a cylinder body 22 having a bottomed cylinder hole 21 that opens toward the main valve chamber 12, and is slidable in the cylinder hole 21. A drive piston 23 that divides the cylinder hole 21 into a first cylinder chamber 21a on the main valve chamber 12 side and a second cylinder chamber 21b on the opposite side thereof, and the second cylinder chamber It has two pilot ports 24 and 25 which communicate with 21b and supply pilot fluid for driving the piston. In the present embodiment, as shown in FIG. 1 or FIG. 6, the housing 11 and the cylinder body 22 are integrally fixed by a bolt 7, thereby configuring the first valve portion 10.

  As shown in FIG. 2 or 4, the drive piston 23 is connected to the other end 13 b of the main valve body 13, and when the drive piston 23 moves in the cylinder hole 21, The valve body 13 moves in the main valve chamber 12. Further, a lip seal 27 having a directionality with respect to the seal is provided on the outer peripheral surface of the drive piston 23. The lip seal 27 does not block the pilot air from the first cylinder chamber 21a to the second cylinder chamber 21b, but the lip seal 27 is opposite to the air from the second cylinder chamber 21b to the first cylinder chamber 21a. Are arranged in a blocking direction.

Of the two pilot ports 24, 25, one port 24 supplies an external pilot fluid to the second cylinder chamber 21b, and the other port 25 is connected to the supply port P1. This is a port for supplying the diverted air to the second cylinder chamber 21b via a pilot valve (not shown). When pilot air is supplied into the second cylinder chamber 21b through the pilot ports 24 and 25, the pilot air acts on the back surface (pressure receiving surface) of the drive piston 23, and the drive piston 23 is connected to the first cylinder chamber 21b. It moves from the 21a side to the second cylinder chamber 21b side. Accordingly, the main valve body 13 is located on the one end portion 13a side of the main valve body 13 from the first switching position (switching position shown in FIG. 2) located on the other end portion 13b side of the main valve body 13. It moves to the second switching position (the switching position shown in FIG. 4).
As shown in FIGS. 2 and 4, in the present embodiment, the other port 25 of the two pilot ports 24 and 25 is closed by a cap 26.

On the other hand, as shown in FIGS. 2 and 4, the main return spring 19 that constantly urges the main valve body 13 toward the other end 13 b is provided on the one end 13 a side of the main valve body 13. Is provided. The main return spring 19 is composed of a coil spring, and is configured to return the main valve body 13 located at the second switching position to the first switching position by the spring biasing force. Yes.
Thus, the connection state between the main ports of the first valve unit 10 is switched when the main valve body 13 moves between the first switching position and the second switching position. It is configured as a position valve.

As apparent from FIGS. 2 and 4, the first fluid flow path in the first valve unit 10 is configured to be connected as follows by switching the position of the main valve body 13. ing.
That is, when the main valve body 13 is in the first switching position shown in FIG. 2, the valve portion 14 of the main valve body 13 abuts on the second main valve seat 17b provided on the second sleeve 17, and As a result, the main output port A1 communicates with the main discharge port R1, and the flow path between the main supply port P1 and the main output port A1 is blocked. On the contrary, when the main valve body 13 is in the second switching position shown in FIG. 4, the valve portion 14 of the main valve body 13 is provided with the first main valve seat 16 b provided on the first sleeve 16. As a result, the main supply port P1 and the main output port A1 communicate with each other, and the flow path between the main output port A1 and the main discharge port R1 is blocked.

Next, the second valve unit 30 will be described.
As shown in FIGS. 1, 2, 4, and 6, the second valve portion 30 includes a substantially cylindrical housing 31 and a first valve portion 10 side (right side in FIG. 2) of the housing 31. It has a bottomed sub-valve chamber 32 that opens and a sub-valve element 33 accommodated in the sub-valve chamber 32. In the present embodiment, the main valve chamber 12 in the first valve portion 10 and the auxiliary valve chamber 32 of the second valve portion 30 are connected on the same axis (that is, on the axis L), and the main valve chamber 12. The main valve element 13 accommodated in the sub-valve and the sub-valve element 33 accommodated in the sub-valve chamber 32 are connected to the axis L, respectively. Below, the specific structure of the 2nd valve part 30 is demonstrated.

  The second valve portion 30 is a two-port valve having a sub supply port P2 and a sub output port A2 communicating with the sub valve chamber 32. The connection state between the sub-ports is switched when the sub-valve element 33 comes in contact with and separates from the sub-valve seat 34 arranged in the sub-valve chamber 32. As described above, the second fluid flow path including the sub supply port P2 and the sub output port A2 is isolated from the first fluid flow path provided in the first valve unit 10.

  As shown in FIG. 3 or FIG. 5, two cylindrical first and second retainers 35 and 36 are attached in the auxiliary valve chamber 32 at a predetermined interval in the axis L direction. Of these retainers 35, 36, the first retainer 35 is disposed in the sub valve chamber 32 between the sub input port P 2 and the sub output port A 2, and has an annular seal member 37 on the outer peripheral surface thereof. Is installed. On the other hand, the second retainer 36 is disposed on the opening end side (first valve portion 10 side) of the auxiliary valve chamber 32, and the seal member 37 is also mounted on the outer peripheral surface of the second retainer 36.

  Of the two retainers 35, 36, the first retainer 35 has a projecting portion 35 b projecting radially inward on the tip side (left side in FIGS. 3 and 5). The projecting portion 35 b is formed with the annular sub valve seat 34 that protrudes toward the bottom wall 32 a of the sub valve chamber 32.

As shown in FIG. 3 or FIG. 5, the sub-valve element 33 is a poppet-type valve element, and is arranged in the direction of the axis L between the sub-valve seat 34 and the bottom wall 32 a of the sub-valve chamber 32. Configured to move to. A sub-return spring 38 is provided between the sub-valve body 33 and the bottom wall 32a to urge the sub-valve body 33 toward the sub-valve seat 34 at all times. The sub valve body 33 is pressed by a first switching position (see FIG. 3) where the sub valve body 33 is seated on the sub valve seat 34 by the biasing force of the sub return spring 38, and the valve rod 40 described later. Thus, it is displaced to a second switching position (see FIG. 5) that is separated from the auxiliary valve seat 34.
When the sub-valve element 33 is located at the first switching position, the sub-input port A2 and the sub-output port P2 are blocked, and when located at the second switching position, the sub-input port A2 and the sub-output port P2 are connected. Has come to communicate. Thus, the 2nd valve part 30 is comprised by the 2 position valve similarly to the said 1st valve part 10. As shown in FIG.

  A rod-shaped valve rod 40 extending in the direction of the axis L is interposed in the auxiliary valve chamber 32. The valve rod 40 is for connecting the main valve body 13 and the sub-valve body 33, and the main valve body 13 is moved from the first switching position shown in FIG. 2 to the second switching position shown in FIG. When moved, the sub-valve element 33 seated on the sub-valve seat 34 is pressed through the valve rod 40 in conjunction with the movement. Thereby, the auxiliary valve body 33 is separated from the auxiliary valve seat 34, and the auxiliary valve body 33 is displaced from the first switching position shown in FIG. 3 to the second switching position shown in FIG.

  As shown in FIGS. 3 and 5, the valve rod 40 is disposed in the internal space of the first retainer 35 and the second retainer 36, and is configured to move in the direction of the axis L in the internal space. ing. An annular flange portion 41 is formed on the outer peripheral surface of the valve rod 40 so as to project in the radial direction of the valve rod 40. A seal member 42 that keeps airtightness between the annular flange portion 41 and the inner wall surface of the second retainer 36 is attached to the annular flange portion 41. The valve rod 40 is configured to slide in the inner wall surface of the second retainer 36 and move in the direction of the axis L while being supported by the inner wall surface.

  The valve rod 40 has a first end and a second end, and the first end 40a is connected to the sub valve body 33 through the opening of the annular sub valve seat 34. Yes. Further, the second end portion 40b of the valve rod 40 passes through an opening 43a of a lid member 43 attached to the opening side (right side in FIG. 3) of the auxiliary valve chamber 32, and an intermediate communication hole 51 in the intermediate connecting portion 50 described later. It protrudes into the (second hole portion 52b).

  Further, on the first end portion 40a side of the valve rod 40, a rod return spring that constantly urges the valve rod 40 toward the opposite second end portion 40a side (that is, the main valve body 13 side). 44 is arranged. The rod return spring 44 is composed of a coil spring, one end of which is received by the back surface (surface opposite to the protruding direction of the sub valve seat 34) of the protruding portion 35a of the first retainer 35, and the others. The end side is received by a spring receiving portion 45 provided on the outer periphery of the valve rod 40.

  As shown in FIG. 2, when the sub-valve element 33 is in the first switching position, the annular flange portion 41 of the valve rod 40 is locked to the peripheral edge of the opening 43 a of the lid member 43 and is spring-biased. The movement of the valve rod 40 in the direction of the main valve body 13 is restricted. At this time, the first end portion 40a of the valve rod 40 is in a state of being spaced apart from the auxiliary valve body 33 with a predetermined gap.

  Further, the valve rod 40 has an open passage 46 for connecting the auxiliary output port A2 and an air release port 55 described later connected to the atmosphere. As shown in FIG. 3 or 5, the open passage 46 is provided at the first end 40 a of the valve rod 40, and is provided at the first opening 46 a that opens along the axis L and the second end 40 b. A second opening 46b drilled in a direction orthogonal to the axis L, and an intermediate passage 46c extending in the axis L direction inside the valve rod 40 and connecting the first and second openings 46a and 46b. It is configured. The second opening 46b communicates with the second through hole 52b of the intermediate connecting portion 50 in a state where the annular flange portion 41 is engaged with the opening edge 43a of the lid member 43 (FIG. 2). FIG. 3).

As shown in FIG. 3, when the sub-valve element 33 is located at the first switching position, as described above, the first end portion 40a of the valve rod 40 and the sub-valve element 33 are separated from each other. . That is, the first opening 46a provided in the valve rod 40 is opened, and the open passage 46 and the sub output port A2 of the sub ports are in communication with each other. As a result, as indicated by the arrow in FIG. 2, the exhaust air from the sub output port A2 flows into the first opening 46a provided in the valve rod 40 through the internal space of the first retainer 35, and the intermediate passage After passing through 46c and the second opening 46b, the air is released from the atmosphere opening port 55 to the atmosphere.
On the contrary, as shown in FIG. 5, when the sub-valve element 33 is located at the second switching position, the first opening 46 a of the valve rod 40 is closed by the end face of the sub-valve element 33. Therefore, the auxiliary output port and the open passage 46 are not in communication.

In the present embodiment, as shown in FIG. 1 or FIG. 6, an intermediate connecting portion 50 is interposed between the first valve portion 10 and the second valve portion 30.
As shown in FIG. 2 or FIG. 4, the intermediate connecting portion 50 includes a long and narrow block 51 having a rectangular outer shape, and a circular cross-sectional through hole provided in the block 51 and penetrating in the direction of the axis L. 52 and a push rod 53 accommodated in the through hole 52. The through hole 52 is located on the same axis line as the main valve chamber 12 of the first valve portion 10 and the sub valve chamber 32 of the second valve portion 30 (that is, on the axis L). The main valve chamber 12 and the sub valve chamber 32 are connected to each other by 52. The through-hole 52 has a first hole 52a that communicates with the main valve chamber 12, and a second hole 52b that communicates with the sub-valve chamber 32. The diameter of the second hole 52b is the first. It is smaller than the hole diameter of the 1 hole part 52a. Accordingly, a step 54 is provided at the boundary between the first hole 52 a and the second hole 52 b, and this step 54 serves as a spring seat for the main return spring 16. Further, the air release port 55 is formed in the second hole portion 52 b of the through hole 52.

  As shown in FIG. 6, a thin flat gasket 70 is interposed between the housing 11 of the first valve portion 10 and the block 51 of the intermediate connecting portion 50. The main valve chamber 12 and the through hole 52 communicate with each other through an opening 71 formed in a direction.

As shown in FIGS. 2 to 4, the push rod 53 has a substantially cylindrical shape extending in the axis L direction, and a first end surface 53 a on one end side in the axis L direction is a second end of the valve rod 40. The second end surface 53b on the other end side in the axis L direction is connected to the one end portion 13a of the main valve body 13 in connection with the portion 40b. In other words, the push rod 53 is configured to indirectly connect the main valve body 13 and the sub-valve body 33.
Further, the push rod 53 is provided with a concave portion 56 having a circular shape in plan view on a substantially central axis (on the axis L) of the first end surface 53a. The recess 56 accommodates the second end 40b of the valve rod 40. The main return spring 19 is interposed on the outer periphery of the push rod 53 so as to surround the outer periphery.

  By arranging such a push rod 53 between the main valve body 13 and the sub valve body 33, when the main valve body 13 of the first valve portion 10 is located at the first switching position, the valve rod The second end portion 40b of 40 is in a state of being supported by the peripheral wall of the concave portion 56 without being in contact with the groove bottom 56a of the concave portion 56 of the push rod 53. That is, when the main valve body 13 is in the first switching position, no force is exerted on the valve rod 40 in the direction of the sub-valve element 33 (left side in FIG. 2). 1 is held at the switching position.

  On the contrary, when the main valve body 13 is switched from the first switching position to the second switching position, the push rod 53 moves in the direction of the sub-valve body 33 integrally with the main valve body 13. . If it does so, the 2nd end part 40b of the said valve rod 40 will contact | abut to the said groove bottom 56a in the push rod 53, and this valve rod 40 will be pressed by the subvalve body 33 side. Thereby, the sub valve body 33 seated on the sub valve seat 34 in the sub valve chamber 32 is pressed by the first end portion 40a of the valve rod 40 located on the opposite side, and the sub valve body 33 is pressed against the sub valve seat. The sub-valve element 33 is switched from the second switching position to the second switching position.

  As shown in FIG. 1 or FIG. 6, the switching valve 1 in the present embodiment has a pair of brackets 60, 60 on one end side (left side in FIG. 3) of the valve body 2. 2 It is attached by fixing screws 65 and 66. As shown in FIG. 1 or FIG. 6, this bracket 60 is for integrally connecting the first valve portion 10 and the second valve portion 30 and is, for example, a hard plate such as a metal plate or a resin plate. Depending on the material, it is formed in a substantially L shape. The bracket 60 includes a first connecting plate 61 fixed to an end surface 51a of the block 51 of the intermediate connecting portion 50 facing the second valve portion 30, and an axis L in the housing 31 of the second valve portion 30. And a second connecting plate 62 fixed to both wall sides located in the orthogonal direction.

  As shown in FIGS. 1 and 6, the first connecting plate 61 has an elongated plate shape and has a length substantially equal to the longitudinal direction (vertical direction in FIG. 1) of the end surface 51a of the block 51. doing. Moreover, the 1st connection plate 61 is provided with the 1st fixing holes 63 and 63 penetrated in the plate | board thickness direction at the both ends of the length direction. On the other hand, the second connecting plate 62 has a flat plate-like shape standing upright from the end edge extending in the longitudinal direction of the first connecting plate 61, and on the tip side in the standing direction (axis L direction). A pair of second fixing holes 64 are formed. As shown in FIG. 6, a pair of screw insertion holes 39, 39 are formed on both wall sides of the housing 31 of the second valve portion 30, and the first fixed to the screw insertion holes 39, 39. A screw 64 is inserted.

  When the first valve portion 10 and the second valve portion 30 are connected using the bracket 60, both the second valve portions 30 in the housing 31 are connected by the second connecting plate 62 of the bracket 60. The second fixing holes 64 and 64 formed in the second connecting plate 62 with the wall side interposed therebetween are aligned with the screw insertion holes 39 and 39 of the housing 31. In this state, the first fixing screw 65 is inserted from the outside of one bracket 60. And a pair of bracket 60 and the housing 31 of the 2nd valve part 30 are connected by fastening with the nut 69 via the washer 67 on the outer side of the other bracket 60.

  Next, the plate surface of the first connecting plate 61 of the bracket 60 is brought into contact with the end surface 51 a of the block 51 of the intermediate connecting portion 50. Then, the first fixing hole 63 of the first connecting plate 61, the screw insertion hole 57 formed at the corner of the block 51, and the screw insertion hole 72 of the gasket 70 are aligned with each other, and the first fixing screw 65 is attached. These holes 63, 57, 72 are inserted. Then, a male screw (not shown) provided at the tip of the first fixing screw 65 is screwed into the screw hole 5 of the housing 11 of the first valve portion 10. Thus, the 1st valve part 10 and the 2nd valve part 30 are connected integrally. In the above description, the second connecting plate 62 and the housing 31 of the second valve unit 30 are connected first. Of course, the first connecting plate 61 and the first valve unit 10 side are connected first. May be.

  In the switching valve 1 having the above-described configuration, when the pilot air is not supplied to the second cylinder chamber 21b of the valve drive unit 20 (OFF state), as shown in FIGS. 2 and 3, the first valve The main valve body 13 accommodated in the main valve chamber 12 of the portion 10 is urged toward the other end 13 b of the main valve body 13 by the urging force of the main return spring 19. Thereby, the main valve portion 14 of the main valve body 13 is located at the first switching position in contact with the second main valve seat 17b. In this state, the communication between the main supply port P1 and the main output port A1 of the first valve unit 10 is blocked, and the flow path between the main output port A1 and the main discharge port R1 is in communication. Compressed air from the output port A1, that is, exhaust from the actuator, is released to the atmosphere via the main discharge port R1.

  When the main valve body 13 is located at the first switching position, as shown in FIG. 3, the first end face 53a of the push rod 53 connected to the main valve body 13 (the groove bottom 56a of the recess 56). Is in a non-contact state with the second end portion 40 b of the valve rod 40 in the second valve body 30. Therefore, the valve rod 40 is urged toward the main valve body 13 by the urging force of the rod return spring 44, and the first end 40a of the valve rod 40 and the sub valve body 33 are They are separated with a predetermined gap. As a result, the sub valve body 33 is located at the first switching position where it is seated on the sub valve seat 34 provided in the sub valve chamber 32 by the biasing force of the sub return spring 38. When the sub valve body 33 is in the first switching position, the flow path between the sub input port P2 and the sub output port A2 in the second valve unit 30 is blocked. The exhaust air from the sub output port A2 is, as shown by the arrow in FIG. 2 or FIG. 3, the open passage 46 that is provided in the valve rod 40 and includes a first opening 46a, an intermediate passage 46c, and a second opening 46b. Then, the air flows into the second hole 52b of the intermediate connecting portion 50 and is exhausted from the atmosphere opening port 55 to the atmosphere.

  From this state, when pilot air is supplied into the second cylinder chamber 21b of the valve drive unit 20 (ON state), the drive piston 23 is driven toward the first cylinder chamber 21a. Accordingly, the main valve body 13 connected to the drive piston 23 moves toward the one end 13a side (sub valve body 33 side) against the urging force of the main return spring 19, and the main valve body 13 is moved. Is displaced to the second switching position where it abuts on the first main valve seat 16b (see FIG. 4). When the main valve body 13 is located at the second switching position, the main supply port P1 and the main output port A1 communicate with each other, and the main output port A1 and the main discharge port R1 are blocked. It has become.

  At this time, the push rod 53 moves together with the main valve body 13 to the sub valve body 33 side, so that the groove bottom 56a in the recess 56 of the push rod 52 abuts on the second end 40b of the valve rod 40 ( (See FIG. 5). In this state, the valve rod 40 is pushed against the urging force of the rod return spring 44 toward the sub-valve element 33, and the gap between the first end 40a of the valve rod 40 and the sub-valve element 33 is reduced. To go.

When the gap between the first end 40a of the valve rod 40 and the sub valve body 33 becomes zero, the sub valve body 33 seated on the sub valve seat 34 resists the biasing force of the sub return spring 38. Then, it is pressed by the first end portion 40a of the valve rod 40. As a result, the sub-valve element 33 is located at the second switching position separated from the sub-valve seat 34, and the flow paths between the sub-input port P2 and the sub-output port A2 communicate with each other, as indicated by the arrows in FIG. As described above, the compressed air supplied from the sub input port P2 is output from the sub output port A2.
Thus, when the main valve body 13 is displaced from the first switching position to the second switching position, the sub-valve body is displaced from the first switching position to the second switching position in synchronization with the displacement. It is configured. When the sub-valve body 33 is in the second switching position, the first end 40a of the valve rod 40 is in contact with the sub-valve body 33, so that the first opening 46a that opens at the first end 40a. Is closed. Thereby, the open passage 46 provided in the valve rod 40 and the auxiliary output port A2 are in a non-communication state.

From this state, when the supply of pilot air into the second cylinder chamber 21b of the valve drive unit 20 is stopped (OFF state), and the pilot air in the second cylinder chamber 21b is discharged, the first The main valve body 13 of the valve unit 10 is returned from the second switching position shown in FIG. 4 to the first switching position shown in FIG. 2 by the urging force of the main return spring 19.
Accordingly, the push rod 53 connected to the main valve body 13 moves together with the main valve body 13 in the direction of the main valve body 13 (right direction in FIG. 2), and the valve rod 40 is connected to the return spring for the rod. The urging force 44 is urged toward the main valve body 13, and the pressure of the valve rod 40 against the sub-valve body 33 is released. At this time, the annular flange portion 41 of the valve rod 40 is engaged with the peripheral edge of the opening 47a of the lid member 47, so that the movement toward the main valve body 13 is restricted. The sub-valve element 33 is configured to return to the first switching position where it is seated on the sub-valve seat 34 by the urging force of the auxiliary return spring 38.
Thus, when the main valve body 13 is returned from the second switching position to the first switching position by the main return spring 19, the sub-valve body 33 is also synchronized with that by the spring biasing force of the sub-return spring 38. It is configured to return from the second switching position to the first switching position.

  Thus, in the switching valve 1 of the present embodiment, the main valve body 13 and the sub-valve body 33 are configured to move in synchronization with each other. Thereby, for example, when detecting the switching position of the main valve body 13 in the first valve unit 10, the compressed air output from the sub output port A <b> 2 in the second valve unit 30 is appropriately converted into a pneumatic indicator. By sending it to a display device or the like, the switching position of the main valve body 13 can be detected. In addition, the compressed air output from the sub output port A2 of the second valve unit 30 can be used as power for another actuator different from the first valve unit 10, so that the second The air output from the valve unit 30 can be selectively used depending on the situation. In addition, since the first valve unit 10 and the second valve unit 30 have fluid flow paths that are isolated from each other, it is possible to switch between two different fluid flow paths with one switching valve 1. .

  Although the switching valve according to the present invention has been described, it is needless to say that the present application is not limited to the above-described embodiment, and various design changes can be made without departing from the scope of the claims of the utility model registration. .

  For example, in the illustrated example, the first valve unit 10 is configured with a three-port valve, and the second valve unit 30 is configured with a two-port valve, but the number of ports is not limited to this. Further, an intermediate connecting portion 50 is interposed between the first valve portion 10 and the second valve portion 30, and the main valve body 13 and the sub valve body 33 are connected via the push rod 53 of the intermediate connecting portion 50. Although indirectly connected, if the main valve body 13 and the sub-valve element 33 move synchronously, the main valve body 13 and the sub-valve element 33 are directly connected without using the push rod 53. May be.

DESCRIPTION OF SYMBOLS 1 Switching valve 2 Valve body 10 1st valve part 12 Main valve chamber 19 Main return spring 20 Valve drive part 30 2nd valve part 32 Sub valve chamber 38 Sub return spring 40 Valve rod 46 Opening passage 55 Atmospheric release port A1 Main output port A2 Sub output port P1 Main supply port P2 Sub supply port R1 Main discharge port

Claims (5)

A first valve section for switching a first fluid flow path including a plurality of main ports; and a second valve section for switching a second fluid flow path including a plurality of sub-ports blocked from the first fluid flow path. Have
The first valve portion and the second valve portion are disposed on one end side and the other end side of the valve body,
The first valve section includes a main valve chamber that communicates with each main port, a main valve body that is housed in the main valve chamber and switches a connection state between the main ports, and a valve drive section that drives the main valve body. ,
The second valve portion has a sub-valve chamber that communicates with each sub-port, and a sub-valve element that is housed in the sub-valve chamber and switches the connection state between the sub-ports,
The main valve chamber and the sub valve chamber, and the main valve body and the sub valve body are respectively disposed on the same axis,
The main valve body and the sub-valve body are connected so as to perform the switching operation in synchronization.
A switching valve characterized by that.   The first valve portion is a two-position valve whose main valve body has a first switching position and a second switching position, and the second valve portion has a sub-valve body having a first switching position and a second switching position. 2. The switching valve according to claim 1, wherein the switching valve is a two-port valve having two ports of a sub input port and a sub output port.   The main valve body and the sub-valve body are driven by the valve drive unit when moving from the first switching position to the second switching position, and are driven by the return spring when moving from the second switching position to the first switching position. The switching valve according to claim 1 or 2, wherein   2. A valve rod extending in the axial direction is interposed between a main valve body and a sub-valve body, and the main valve body and the sub-valve body are connected by the valve rod. The switching valve according to any one of -3.   5. The switching according to claim 4, wherein the valve rod has an open passage formed therein, and the open passage communicates with the auxiliary output port and an air release port connected to the atmosphere. valve.

Images