Switching valve with operating rod

Abstract

The utility model provides a switching valve with an operating rod, which can easily lock tilting of the operating rod when a slide valve is located at a switching position. The switching valve is provided with: a valve main body part for switching the communication state between ports by the movement of a spool valve housed in a valve hole; a stopper mechanism that holds the position of the spool valve; and an operation unit that moves the spool valve by tilting the operation lever. The operation part is provided with a joint part which is connected between the operation rod and the valve main body part and converts the tilting motion of the operation rod into linear motion; and a lock mechanism that locks the operation lever in a state in which the spool valve is held at the switching position. The lock mechanism is provided with: a lever part that can move within the operating lever; the pin component is arranged on the rod part; a plurality of engagement grooves into which the pin member is engageable in a pluggable manner in correspondence with the plurality of switching positions; a compression spring that urges the rod portion in a direction in which the pin member enters the engagement groove; and a lever operation section that moves the lever section in a direction in which the pin member is pulled out of the engagement groove.

Description

Technical Field

[0001] The utility model relates to a switching valve with an operating lever, in which a sliding valve is movably accommodated in a valve hole connected to a plurality of ports. The sliding valve is moved by tilting the operating lever to switch to a plurality of switching positions with different connection states between the plurality of ports, and a stop mechanism can be used to maintain the position of the sliding valve moved to the switching position. Background Art

[0002] There have been various types of switching valves with operating levers, in which a slide valve is movably accommodated in a valve hole connected to a plurality of ports, the slide valve is moved by tilting the operating lever to switch to a plurality of switching positions with different communication states between the plurality of ports, and the slide valve moved to the switching position can be held in position by a stopper mechanism. In the conventional switching valve, as described in Patent Document 1, a stopper mechanism is provided at one end portion in the axial direction of the slide valve, and an operating lever is tiltably connected to the other end portion in the axial direction.

[0003] However, in this conventional switching valve, when a force is unintentionally applied to the operating lever while the slide valve is held at the switching position by the stopper mechanism, the operating lever tilts and the stopper is released, so that the slide valve may switch from the switching position to another switching position.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: U.S. Patent No. 3602245 Utility Model Content

[0007] Problems to be solved by the utility model

[0008] Therefore, the technical problem of the utility model is to provide a switching valve with an operating lever, in which a stop mechanism can be used to hold the position of a slide valve that is moved to a switching position by tilting an operating lever. When the slide valve is held in the switching position, even if a force is unconsciously applied to the operating lever, the slide valve can be prevented from moving from the switching position by locking the operating lever, and this can be achieved with a simple structure.

[0009] Means for solving problems

[0010] 20. The control valve according to claim 19, wherein the control valve has a plurality of control arms and a plurality of control arms connected to the control valve. The plurality of control arms are connected to the control valve in a manner that the control valve is movable along an axial direction and wherein the plurality of control arms are movable along an axial direction and wherein the plurality of control arms are movable along an axial direction and wherein the plurality of control arms are movable along an axial direction and wherein the plurality of control arms are movable along an axial direction and wherein the plurality of control arms are movable along an axial direction and wherein the plurality of control arms are movable along an axial direction and wherein the plurality of control arms are movable along an axial direction and wherein the plurality of control arms are movable along an axial direction and wherein the plurality of control arms are movable along an axial direction and wherein the plurality of control arms are movable along an axial direction and wherein the plurality of control arms are movable along and a locking mechanism, wherein the locking mechanism locks the tilting movement of the operating rod when the stop mechanism is used to maintain the sliding valve position in the switching position. The locking mechanism comprises: a rod portion, the rod portion being accommodated in the operating rod in a manner that is movable along the central axis direction of the operating rod; a pin member, the pin member being arranged on the rod portion in a direction orthogonal to the central axis direction; a plurality of engaging grooves, the plurality of engaging grooves being fixedly arranged relative to the valve body portion and allowing the pin member to be plugged and pulled out corresponding to the plurality of switching positions; a spring member, the spring member always applies force to the rod portion in a direction of inserting the pin member into the engaging groove; and a rod operating portion, the rod operating portion being operated by overcoming the force applied by the spring member, thereby causing the rod portion to move in a direction of pulling the pin member out of the engaging groove.

[0011] In this case, it is preferred that a head is provided at the end of the valve body in the axial direction, the interior of the head is hollow, and a rotating shaft extending in a direction orthogonal to the central axis direction is fixedly provided in the head, and the top end of the operating rod is supported to be rotatable around the rotating shaft, and the multiple engaging grooves are provided in the head at a position above the rotating shaft and open toward the bottom, and the rod operating portion is pressed in the direction of the central axis to move the rod portion downward, thereby moving the pin member in a direction of being pulled out of the engaging groove.

[0012] Furthermore, preferably, the lever operating portion is connected to a base end portion of the lever portion in the central axis direction in the operating lever, and a portion of the lever operating portion protrudes from the base end portion of the operating lever by the urging force of the spring member in a non-operating state.

[0013] In addition, preferably, the pin member extends in a direction orthogonal to the axis line and the center axis and protrudes from both sides of the top end portion of the rod portion, and in the operating portion, the plurality of engagement grooves are provided on both sides of the center axis with which each of the two end portions of the pin member can engage.

[0014] In addition, it is preferred that the joint portion is provided in the operating portion in a manner that allows it to move along the axial direction, and the stop mechanism is constructed to include: a stop shaft, which protrudes from the end portion of the joint portion on the opposite side of the sliding valve and is coaxial with the sliding valve, and has a plurality of annular grooves corresponding to the plurality of switching positions on the outer peripheral surface; and a locking ring, which can be engaged with and disengaged from each of the plurality of annular grooves of the stop shaft.

[0015] Effect of utility model

[0016] The camming mechanism is configured to lock the camming lever in a manner such that the camming lever is locked to a position where the camming lever is held in the switched position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the switching valve with an operating lever according to one embodiment of the present invention.

[0018] Figure 2 It is a side view of the switching valve with the operating lever.

[0019] Figure 3 is equivalent to Figure 1 A cross-sectional view of a switching valve with an operating lever as viewed in the direction III-III.

[0020] Figure 4 is equivalent to Figure 2 A cross-sectional view of a switching valve with an operating lever as viewed in the direction IV-IV.

[0021] Figure 5 is equivalent to Figure 2 A sectional view of a switching valve with an operating lever as viewed in the VV direction.

[0022] Figure 6 This is an exploded perspective view of a switching valve with an operating lever.

[0023] Figure 7 yes Figure 5 An enlarged cross-sectional view of a main part of the switching valve is shown.

[0024] Figure 8 It is a cross-sectional view of the switching valve when the lever operation portion is pressed in a state where the spool valve is moved to the first switching position.

[0025] Fig. 9 It means in Figure 8 An enlarged cross-sectional view of a main part of the switching valve showing the relationship between a pin member and an engaging groove in the switching valve.

[0026] Fig.10 This is a cross-sectional view of the switching valve in a state where the lever operating portion is pressed and the operating lever is tilted to the left.

[0027] Fig.11 It means in Fig.10 An enlarged cross-sectional view of a main part of the switching valve showing the relationship between a pin member and an engaging groove in the switching valve.

[0028] Fig.12 is Fig.11 The switching valve is a cross-sectional view of a state where the operation of the rod pressing portion of the switching valve is released.

[0029] Fig.13 It means in Fig.12 An enlarged cross-sectional view of a main part of the switching valve showing the relationship between a pin member and an engaging groove in the switching valve.

[0030] Fig.14 It is a cross-sectional view of the switching valve when the operation lever is tilted to the right in a state where the operation of the lever pressing portion is released.

[0031] Description of Reference Numerals

[0032] 1Switch valve (switch valve with operating lever)

[0033] 3 Valve hole

[0034] 4 Slide valve

[0035] 5 Valve body

[0036] 20 Operation Department

[0037] 21 Head

[0038] 22 Rotation axis

[0039] 30 Joint

[0040] 40 Joystick

[0041] 43 Hole

[0042] 60 Stop mechanism

[0043] 61 Stop shaft

[0044] 62 Annular groove

[0045] 63 locking ring

[0046] 70 Locking mechanism

[0047] 71 Rod

[0048] 73 Lever operating unit

[0049] 76 Compression spring (spring component)

[0050] 78 pin components

[0051] 81 first engagement groove (engagement groove)

[0052] 82 second engagement groove (engagement groove)

[0053] 83 third engagement slot (engagement slot)

[0054] L1 axis

[0055] L2 Center axis

[0056] P1 first switching position (switching position)

[0057] P2 second switching position (switching position)

[0058] P3 third switching position (switching position) DETAILED DESCRIPTION

[0059] Hereinafter, an embodiment of the switching valve with an operating lever of the utility model is described. The switching valve with an operating lever of this embodiment is described by taking a three-position switching valve in which the fluid flowing in the switching valve is compressed air and the slide valve can be switched to three switching positions as an example. Hereinafter, the "switching valve with an operating lever" is simply recorded as a "switching valve".

[0060] like Figure 1-Figure 4As shown, the switching valve 1 includes: a valve body 5, wherein the valve body 5 accommodates a slide valve 4 in a valve hole 3 connected to a plurality of ports in a manner that allows movement along the axis L1, and through the movement of the slide valve 4, the slide valve 4 can be switched to three switching positions, namely, a first switching position (switching position) 81, a second switching position (switching position) 82, and a third switching position (switching position) 83, in which the connection states between the plurality of ports are different; a stopper mechanism 60, wherein the stopper mechanism 60 and the slide valve 4 are arranged on the same axis and can hold the position of the slide valve 4 in each of the three switching positions of the first to third switching positions 81-83; and an operating part 20, wherein the operating part 20 releases the position holding of the stopper mechanism 60 through the tilting operation of the operating lever 40 and selectively moves the slide valve 4 to other switching positions.

[0061] For convenience of description, the longitudinal direction is sometimes described as the left-right direction, the direction perpendicular to the longitudinal direction is sometimes described as the up-down direction, and the direction perpendicular to the left-right direction and the up-down direction is sometimes described as the front-back direction.

[0062] The valve body 5 is a well-known three-position switching valve, so its outline is described below. The valve body 5 has a valve body 6 extending in the left-right direction (length direction) and serving as the main body of the valve body 5, and a cover 8 mounted on the right end of the valve body 6. The valve body 6 is provided with a valve hole 3 that is connected to a plurality of ports and penetrates in the axis L1 direction (left-right direction), and a slide valve 4 is inserted into the valve hole 3 in a manner that it can slide freely in the axis L1 direction. The slide valve 4 is formed so that its length in the axis L1 direction is slightly longer than the length of the valve hole 3 in the axis L1 direction, and the right end of the slide valve 4 can be inserted and pulled out of the recessed portion 8a provided on the left end surface of the cover 8, and the left end of the slide valve 4 protrudes from the left end of the valve hole 3.

[0063] In the present embodiment, the slide valve 4 can be in the first switching position P1 (see Figure 4 ), the second switching position P2 (refer to Fig.10 ) and the third switching position P3 (refer to Fig.14 ), in the first switching position P1, the right end face 4a of the slide valve 4 is located on a substantially same plane as the right end face 6a of the valve body 6, in the second switching position P2, the right end face 4a of the slide valve 4 is inserted into the recessed portion 8a of the cover portion 8, and in the third switching position P3, the right end face 4a of the slide valve 4 moves to the left side relative to the right end face 6a of the valve body 6. The switching valve 1 is configured to switch the communication states between the plurality of ports by moving the slide valve 4 to each of the three switching positions of the first to third switching positions P1, P2, and P3.

[0064] like Figure 4-Figure 6As shown, the operating portion 20 includes: a head portion 21 connected to the left end portion of the valve body portion 5; an operating rod 40 supported so as to be tiltable in the left-right direction and extending upward with a rotating shaft 22 fixed in the head portion 21 as a rotation fulcrum; and a locking mechanism 70 for locking the tilting of the operating rod 40 when the slide valve 4 moves to each of the three switching positions. In this embodiment, the interior of the head portion 21 is formed into a hollow box shape, and a cylindrical portion 23 protruding upward is provided in the upper portion of the head portion 21. In addition, the rotating shaft 22 is fixed in the upper portion of the head portion 21 in a state extending in the front-rear direction.

[0065] The head 21 is fixed to the valve body 6 in a state where it is positioned in the up-down and left-right directions by fastening a plurality of bolts 25 inserted into the head 21 with the bottom surface 24a of the positioning member 24 threadedly engaged with the outer periphery of the cylinder 23 abutting against the upper surface 6c of the valve body 6 and the right side end surface 21a of the head 21 abutting against the left side end surface 6b of the valve body 6.

[0066] A space portion 26 is formed inside the head portion 21. The space portion 26 is formed to include an upper space portion 26a formed in the cylinder portion 23 and a lower space portion 26b that is connected to the lower portion of the upper space portion 26a and extends in the left-right direction. In the present embodiment, the upper space portion 26a is formed in a cylindrical shape extending in the up-down direction, and the lower space portion 26b is formed in a cylindrical shape extending in the left-right direction. The upper end of the upper space portion 26a opens at the upper end of the cylinder portion 23, and the right end of the lower space portion 26b opens at the right end surface 21a of the head portion 21.

[0067] The joint portion 30 is accommodated in the lower space portion 26b (operating portion) in a manner that allows it to move in the left-right direction. In addition, a connecting hole portion 28 extending in the direction of the axis L1 is provided at the lower left side of the head portion 21, and the connecting hole portion 28 is connected to the lower space portion 26b. It should be noted that the opening at the upper end of the upper space portion 26a is referred to as the upper opening portion 26a1, and the opening at the right end of the lower space portion 26b is referred to as the right opening portion 26b1. The left end of the slide valve 4 is inserted into the right opening portion 26b1, and a stopper shaft 61 as a part of a stopper mechanism 60 described later is inserted through the connecting hole portion 28.

[0068] The joint portion 30 includes: a joint body 31 extending in the left-right direction to form a cylindrical shape; a connecting portion 34, which is arranged at the right end portion of the joint body 31 and connected to the left end portion of the slide valve 4; and a stop shaft 61, which protrudes from the left end portion of the joint body 31.

[0069] A hole portion 32 extending in the up-down direction is provided in the central portion in the left-right direction of the joint body 31. The lower end portion (top end portion) of the operating rod 40 is inserted into the hole portion 32 in a slidable manner from above, and the lower end portion has a spherical portion 42 whose surface is spherically curved. When the lower end portion of the operating rod 40 tilts in the left-right direction with the rotating shaft 22 as a rotation fulcrum, the joint portion 30 moves in the left-right direction, and the slide valve 4 can be moved. In the present embodiment, the rotating shaft 22 is arranged at a position above the joint body 31 and crosses in the lower space portion 26b, and the upper portion of the hole portion 32 is expanded in a manner that is inclined upward and outward in the left-right direction. Therefore, even if the lower end portion of the operating rod 40 tilts in the left-right direction, the lower end portion will not abut against the upper portion of the hole portion 32.

[0070] like Figure 4 and Figure 6 As shown, the operating rod 40 extends in the up-down direction relative to the rotating shaft 22. In the present embodiment, the operating rod 40 includes: a rod body 41, which is supported on the rotating shaft 22 in a tiltable manner and extends in the up-down direction; and a handle portion 50, which is connected to the upper end of the rod body 41 and is used for gripping.

[0071] The rod body 41 is formed into a cylindrical shape extending in the up-down direction, and a spherical body 42 is provided at the lower end of the rod body 41 to be inserted into the hole 32 of the joint part 30 in a slidable manner. The upper end of the rod body 41 is fixed in a state of being inserted into the lower end of the handle part 50. The rotation shaft 22 is inserted through the lower end of the rod body 41 at a position above the spherical body 42. In addition, a hole 43 extending along the central axis L2 of the operating rod 40 is provided inside the rod body 41, and the hole 43 extends upward from a position above the position where the rotation shaft 22 is inserted along the central axis L2 direction. The rod part 71 of the locking mechanism 70 described later is accommodated in the hole 43.

[0072] The handle portion 50 includes: a connection portion 51, the connection portion 51 is connected to the rod body 41; and a handle body portion 52, the handle body portion 52 is connected to the upper end of the connection portion 51 and extends upward, and is used for tilting operation. In the present embodiment, the connection portion 51 is formed in a cylindrical shape, and the handle body portion 52 is formed in a cylindrical shape with a larger diameter than the connection portion 51. It should be noted that the handle portion 50 is not limited to a cylindrical shape as long as it can be grasped by the operator, and may also have a shape in which the outer diameter of the handle portion 50 gradually increases as it moves upward.

[0073] A top surface 53 extending in a direction orthogonal to the center axis L2 is formed at the upper end of the handle body 52, and a through hole 54 penetrating in the center axis L2 is provided in the handle 50. In the present embodiment, the through hole 54 includes a lower hole 54a formed at the lower end of the handle 50, a middle hole 54b formed at the middle part of the handle 50, and an upper hole 54c formed at the upper end of the handle 50. The lower hole 54a is open at the lower end of the handle 50, and the upper end of the rod body 41 is inserted into the lower hole 54a through the opening. The middle hole 54b is connected to the upper end of the lower hole 54a, and has a smaller diameter than the lower hole 54a. The upper hole 54c is connected to the upper end of the middle hole 54b, and has a larger diameter than the middle hole 54b, and the upper end of the upper hole 54c is open at the top surface 53 of the handle 50.

[0074] Furthermore, a bellows 56 that is retractable and tiltable is provided between the upper end of the operating rod 40 and the upper end of the positioning member 24 so as to cover the upper opening 26 a 1 of the head 21 .

[0075] Next, the locking mechanism 70 will be described. Figure 6-Figure 8 As shown, the locking mechanism 70 is configured to include: a rod portion 71, which is accommodated in the operating rod 40 in a manner that it can move along the central axis L2 direction of the operating rod 40; a pin member 78, which is provided on the rod portion 71 along the front-rear direction orthogonal to the central axis L2 direction; a first engaging groove 81, a second engaging groove 82, and a third engaging groove 83, which are fixedly provided on the valve body portion. 5 (operating portion), for engaging the pin member 78 so as to be pluggable and removable corresponding to the three switching positions P1-P3; a compression spring 76 (spring member), which always applies force to the rod portion 71 in the direction of inserting the pin member 78 into any one of these engaging grooves 81-83; and a rod operating portion 73, which operates by overcoming the force of the compression spring 76, thereby moving the rod portion 71 in the direction of pulling the pin member 78 out of the engaging grooves 81-83.

[0076] In the present embodiment, the rod portion 71 includes: a lower rod portion 71a, which is inserted into the hole portion 43 of the rod body 41; and an upper rod portion 71b, which is inserted into the middle hole portion of the operating rod 40 and has a larger diameter than the lower rod portion. The axial length of the lower rod portion 71a is substantially the same as the length of the hole portion 43, and the axial length of the upper rod portion 71b is longer than the length of the middle hole portion 54b, and the upper end portion of the upper rod portion 71b protrudes from the middle hole portion 54b into the upper hole portion 54c.

[0077] The lever operating portion 73, which is continuously provided with the upper end portion (base end portion) of the upper lever portion 71b, is formed into a cylindrical shape, has a larger diameter than the upper lever portion 71b, and is slidably received in the upper hole portion 54c. A compression spring 76 is provided between the bottom surface of the upper hole portion 54c and the lower end portion of the lever operating portion 73, one end of the compression spring 76 abuts against the bottom surface of the upper hole portion 54c, and the other end abuts against the bottom surface of the lower end portion of the lever operating portion 73, and always applies force to the lever portion 71 and the lever operating portion 73 upward.

[0078] A pin member 78 is provided at the top end of the lower rod portion 71a and is provided to penetrate in the front-to-back direction (direction of the axis L1). The pin member 78 protrudes from both sides of the top end of the lower rod portion 71a. Both ends of the pin member 78 are provided in the head portion 21 and are engaged with the first to third engagement grooves 81-83 in a manner that allows engagement and disengagement. In the present embodiment, both ends of the pin member 78 are provided through the long holes 44 (see FIG. 4 ) provided on the front and rear sides of the rod body 41. Figure 6 ) protrudes outward, and is provided with a locking plate 80 having three engaging grooves, first to third engaging grooves 81-83, which can be engaged with each of the two ends of the pin member 78. In this embodiment, the locking plate 80 is extended in the left-right direction orthogonal to the pin member 78.

[0079] The locking plate 80 is formed in an inverted U-shape with an open bottom, and three engaging grooves, namely, first to third engaging grooves 81-83, are arranged in a row in the left-right direction on the inner surface of the upper end thereof. In the present embodiment, the locking plate 80 is provided with a second engaging groove 82, a first engaging groove 81, and a third engaging groove 83 in sequence from the left side to the right side. These engaging grooves 81-83 are formed in an inverted U-shape with an open bottom, and the depth of each engaging groove 81-83 is smaller than the diameter of the pin member 78 and larger than the radius of the pin member 78. Therefore, when the pin member 78 is engaged with any of the engaging grooves 81-83, even if a force is unintentionally applied to the operating rod 40, the side surface of the pin member 78 abuts against any inner surface of the engaging grooves 81-83 in the left-right direction, thereby locking the tilting of the operating rod 40.

[0080] The locking plate 80 is installed in the guide block 85, which is formed in a half-moon shape in a plan view and extends in the vertical direction. A receiving recess 86 with an open lower end is provided on the inner surface of the guide block 85 facing the inner side, and the locking plate 80 is installed in the receiving recess 86. The guide block 85 is arranged in such a way that the inner surface of the guide block 85 faces the long holes 44 respectively provided on the two side surfaces of the rod body 41, and the end of the pin member 78 protruding from the long hole 44 is engaged with any one of the first to third engaging grooves 81-83.

[0081] It should be noted that if Figure 3As shown, the guide block 85 is respectively arranged on a pair of step portions 21c arranged opposite to the inner surface of the barrel 23 of the head 21 in the front-to-back direction, and the guide block 85 is fixed in the head 21 by inserting the protrusion 87 protruding from the curved outer surface of the guide block 85 into the fixing hole portion 88 arranged on the inner surface of the barrel 23.

[0082] In addition, if Figure 7 and Figure 8 As shown, since the lever operating portion 73 connected to the lever portion 71 is always urged upward by the compression spring 76, the lever portion 71 provided with the pin member 78 will not move in the direction (downward) in which the pin member 78 is pulled out from any of the engagement grooves 81-83 when the pin member 78 is engaged with the engagement grooves 81-83. Therefore, even if a force is unintentionally applied to the operating lever 40 when the pin member 78 is engaged with the engagement grooves 81-83, the operating lever 40 will not tilt because the operating lever 40 is in a locked state.

[0083] Furthermore, a space portion 89 is provided below the engagement grooves 81 to 83 in the lock plate 80 to allow the pin member 78 to move in accordance with the tilting of the operating lever 40 .

[0084] With respect to the lever operating portion 73, when the pin member 78 is engaged with any one of the engagement grooves 81-83, the upper end portion of the lever operating portion 73 protrudes from the upper end of the handle body portion 52 of the operating lever 40. The length by which the upper end portion of the lever operating portion 73 protrudes from the upper end of the handle body portion 52 is the same as the amount of movement required to pull the pin member 78 out of any one of the engagement grooves 81-83. Therefore, by moving the upper end of the lever operating portion 73 to the same plane as the top surface 53 of the upper end of the handle body portion 52, the pin member 78 can be easily pulled out of the engagement grooves 81-83.

[0085] Next, the stop mechanism 60 will be described. Figure 7 As shown, the stop mechanism 60 includes: a stop shaft 61, which is protruding from the joint body 31; three annular grooves 62, which are annularly formed on the outer peripheral surface of the stop shaft 61; and a locking ring 63, which is engaged with these annular grooves 62. In this embodiment, the stop shaft 61 extends coaxially with the slide valve 4 and can move in the direction of the axis L1 relative to the connecting hole portion 28. The top end portion of the stop shaft 61 is movably inserted into the recess 35a, which is provided on the right end surface of the cover member 35, and the cover member 35 is inserted into the left end portion of the head 21.

[0086] The cover member 35 is formed in a cylindrical shape and is inserted into the hole portion 21b provided at the left end portion of the head portion 21. A receiving recess 35b for receiving the locking ring 63 is provided at the right end of the cover member 35. When the cover member 35 is inserted into the hole portion 21b with the locking ring 63 received in the receiving recess 35b, the locking ring 63 is clamped between the bottom surface of the hole portion 21b and the bottom surface of the receiving recess 35b, and the locking ring 63 is fixed in the receiving recess 35b.

[0087] In this embodiment, three annular grooves 62 are provided on the outer peripheral surface of the stopper shaft 61 in a row along the axis L. The intervals between these annular grooves 62 correspond to the intervals between the first to third switching positions P1, P2, and P3 of the slide valve 4, respectively.

[0088] Further addition Figure 6 To explain, the locking ring 63 is formed by bending a spring wire, and has a small-diameter ring portion 63a that is locked around the locking groove 62, and a large-diameter ring portion 63b that is annularly arranged outside the small-diameter ring portion 63a. The small-diameter ring portion 63a applies a force to the annular groove 62 radially inward at a predetermined pressure when the small-diameter ring portion 63a is engaged with the annular groove 62. Therefore, when the slide valve 4 moves to any of the first to third switching positions P1, P2, and P3, the locking ring 63 can be used to hold the slide valve 4 in position. In addition, the stopper mechanism 60 can release the stopper and move the slide valve 4 to another switching position by overcoming the force of the locking ring 63 in the slide valve 4 that is held in any of the first to third switching positions 81-83 and tilting the operating rod 40.

[0089] Next, refer to Figure 5 , Figure 7-Figure 13 The operation when the slide valve 4 is switched from the first switching position P1 to the second switching position P2 in the switching valve 1 will be described. Figure 5 and Figure 7 As shown, when the slide valve 4 moves to the first switching position P1, the operating rod 40 extends upward, and the slide valve 4 is held in the first switching position P1 by the stop mechanism 60, and the pin member 78 of the locking mechanism 70 engages with the first engaging groove 81, and the tilting of the operating rod 40 is locked.

[0090] like Figure 8 and Fig. 9 As shown in FIG. 1 , when the lever operating portion 73 is pressed downward from this state, the pin member 78 moves downward and is pulled out of the first engagement groove 81, and the operating lever 40 becomes a state allowing the tilting operation. Fig.10 and Fig.11As shown in FIG. 1 , when the operating lever 40 is tilted to the left side against the force of the locking ring 63 of the stop mechanism 60 while the lever operating portion 73 is pressed, the stop is released, and the pin member 78 moves to the left side together with the operating lever 40. At the same time, the slide valve 4 moves to the second switching position P2. Then, as shown in FIG. Fig.12 and Fig.13 As shown, when the pressing operation of the lever operating portion 73 is released, the lever operating portion 73 moves upward due to the urging force of the compression spring 76, and the pin member 78 is inserted into and engaged with the second engagement groove 82, thereby locking the tilting of the operating lever 40.

[0091] It should be noted that the slide valve 4 is switched from the first switching position P1 to the third switching position P3 (see Fig.14 ) is in accordance with the above-mentioned case of switching the slide valve 4 from the first switching position P1 to the second switching position P2, so its description is omitted.

[0092] In this way, the switching valve 1 of the present embodiment can move the rod portion 71 in the direction in which the pin member 78 engages with the engagement grooves 81-83 by the compression spring 76 only by releasing the operation of the rod operating portion 73, thereby locking the operating rod 40. Therefore, a switching valve 1 with an operating rod is provided, which can prevent the slide valve 4 from moving from the switching position by locking the operating rod 40 even if a force is unintentionally applied to the operating rod 40, and can be realized with a simple structure.

[0093] It should be noted that, in the above embodiment, the slide valve 4 is shown to be a slide valve that can move to three switching positions 81-83, but it is not limited to this, and it can also be a slide valve that can move to two switching positions. In addition, in the above embodiment, the rod operating part 73 is coaxially arranged and connected to the rod part 71, but it is not limited to this, and it can also be that the rod operating part 73 is supported to be able to tilt relative to the side of the handle part 50, and when the rod operating part 73 is tilted to the side of the handle part 50, the rod part 71 moves downward. In this case, when the operation of the rod operating part 73 is released, it is preferred to use a compression spring 76 to return the rod operating part 73 to its original position. In addition, in the above embodiment, a switching valve 1 through which compressed air can flow is shown, but it is not limited to this, and it can also be a switching valve operated by hydraulic pressure.

Claims

1. A switching valve with an operating lever, the switching valve comprising: a valve body, the valve body housing a sliding valve in a valve hole connected to a plurality of ports in a manner that can move along an axial direction, and through the movement of the sliding valve, it can switch to a plurality of switching positions with different communication states between the plurality of ports; a stop mechanism, the stop mechanism is coaxially arranged with the sliding valve and can hold the position of the sliding valve at each of the plurality of switching positions; and an operating part, the operating part releases the position holding of the stop mechanism through the tilting operation of the operating lever, and selectively moves the sliding valve to other switching positions, characterized in that The operating part comprises: a joint part, the joint part is connected between the top end part in the central axis direction of the operating rod and the end part in the axial direction of the valve body part, and converts the tilting movement of the operating rod into a linear movement along the axial direction; and a locking mechanism for locking the tilting of the operating lever in a state where the slide valve is held at the switching position by the stop mechanism, The locking mechanism comprises: a rod portion, the rod portion being accommodated in the operating rod in a manner movable along the central axis direction of the operating rod; and a pin member, the pin member being provided on the rod portion in a direction orthogonal to the central axis direction; a plurality of engaging grooves fixedly arranged relative to the valve body and engaging the pin member in a pluggable manner corresponding to the plurality of switching positions; a spring member that always applies force to the rod along a direction of inserting the pin member into the engaging groove; and a lever operating portion that is operated by overcoming the biasing force of the spring member to move the lever portion in a direction in which the pin member is pulled out of the engagement groove.

2. The switching valve with an operating lever according to claim 1, characterized in that: A head portion is provided at an end portion of the valve body portion in the axial direction. The interior of the head is hollow, and a rotation axis extending in a direction orthogonal to the central axis direction is fixedly provided in the head, and the top end of the operating rod is supported to be rotatable around the rotation axis. The plurality of engagement grooves are disposed above the rotation axis in the head and open downward. The lever operating portion is pressed in the direction of the central axis to move the lever portion downward, thereby moving the pin member in a direction in which the pin member is removed from the engagement groove.

3. The switching valve with an operating lever according to claim 2, characterized in that: The lever operating portion is connected to a base end portion of the lever portion in the central axis direction in the operating rod, and a portion of the lever operating portion protrudes from the base end portion of the operating rod by the biasing force of the spring member in a non-operating state.

4. The switching valve with an operating lever according to claim 1, characterized in that: The pin member extends in a direction perpendicular to the axis and the central axis and is protruded from both sides of the top end of the rod. The plurality of engagement grooves into which both end portions of the pin member can be engaged are provided on both sides sandwiching the central axis in the operation portion.

5. The switching valve with an operating lever according to claim 1, characterized in that: The joint portion is provided in the operating portion so as to be movable along the axial direction. The stop mechanism is configured to include: a stop shaft, the stop shaft is protruded from the end of the joint portion on the side opposite to the slide valve and coaxially with the slide valve, and a plurality of annular grooves corresponding to the plurality of switching positions are provided on the outer peripheral surface; and a locking ring that can be engaged with and disengaged from each of the plurality of annular grooves of the stop shaft.

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