JP2004278774A - Valve locking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve locking device capable of locking a lever handle of a valve device with a simple structure. <P>SOLUTION: The valve locking device 10 locks the rotation of a valve element by turning the valve element in a valve casing 21 by a lever handle 22, and locking the rotation of the lever handle 22 with respect to a valve device 20 to open/close a flow passage in the valve casing 21. The valve locking device 10 comprises a base plate 11, a fitting member 12 to fit the base plate 11 to the valve casing 21, a locking member 13 which is fitted to the base plate 11 to lock the rotation of the lever handle 22, and a lock-operating mechanism 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  According to the present invention, in a valve device for opening and closing a flow path in the valve box by rotating a valve element in a valve box with a lever handle, the rotation of the valve element is locked by locking the rotation of the lever handle. The present invention relates to a valve locking device that performs

  Conventionally, in order to prevent the lever handle from rotating by accidentally colliding with the lever handle of the valve device, a valve lock mechanism that locks the lever handle and can quickly unlock the lever handle when it is desired to rotate the lever handle is provided. Various ideas have been devised.

  For example, Patent Literature 1 described below discloses a ball valve that opens and closes by turning a valve body with a lever handle fitted to a protruding portion of a stem (valve rod). In the ball valve, the stem above the lever handle is provided with a compressed spring. Further, on the upper surface of the body (valve box), there are provided a stopper for regulating the movable range of the lever handle, and a groove in which the locking portion of the lever handle is immovably fitted when the valve element is closed.

  In the above configuration, the spring urges the lever handle downward to hold the locking portion of the lever handle in the closed position in the groove, thereby locking the lever handle in the closed position. Further, the locked state is released by separating the locking portion from the inside of the groove against the urging force of the spring.

  Further, Japanese Patent Application Laid-Open No. H11-163,086 discloses a valve shaft rotation / lock device that raises a rotation restricting member through which a stem penetrates to support the rotation restricting member, and lowers the rotation restricting member to enable rotation of the stem. Is described. In this device, the rotation restricting member is fitted to the upper part of the stem so as to be vertically movable and non-rotatable, and is prevented from coming off by a retaining member fixed to the upper end of the stem. A protrusion is provided outside the rotation restricting member, and a blocking member provided with a groove in which the protrusion fits is fixed to the body side.

The protruding piece of the rotation restricting member and the groove of the blocking member are fitted with the valve body opened, closed, or set at a set opening to lock the rotation restricting member. As a result, the stem that rotates integrally with the rotation restricting member is locked by opening, closing, or setting the opening degree of the valve body. By lowering the rotation regulating member, the protruding piece of the rotation regulating member is separated from the groove of the blocking member, and the locked state is released.
JP-A-2000-161531 (released on June 16, 2000) JP-A-2000-193134 (released on July 14, 2000)

  However, as described in the above patent document, incorporating a lock mechanism into the valve device itself complicates the structure of the valve device and increases the number of manufacturing steps. As a result, the size of the valve device is increased, and the manufacturing cost is increased.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a valve lock device capable of locking a lever handle of a valve device with a simple structure.

  In order to solve the above problems, the valve lock device according to the present invention is a valve device that opens and closes a flow path in the valve box by rotating a valve element in the valve box with a lever handle. A valve lock device for locking the rotation of the valve body by locking the rotation of a lever handle, comprising: a base; mounting means for mounting the base on the valve box; and rotation of the lever handle mounted on the base. And locking means for locking the lock.

  Further, in the valve lock device according to the present invention, in the above-described configuration, the lock means includes a rotation preventing means for preventing rotation of the lever handle, and a lock release position which is a position where the lock is not performed. And a biasing means for biasing the rotation preventing means to a blocking position for performing the rotation.

  Further, in the valve lock device according to the present invention, in the above-described configuration, the lock unit includes: a rotation preventing unit configured to prevent rotation of the lever handle; and a blocking release position that is a position not performing the blocking. Urging means for urging the rotation preventing means to a blocking position for performing the blocking, and holding means for holding the blocking means at the blocking releasing position, wherein the lever handle rotates to face a predetermined direction. And holding means for releasing the holding when the user touches.

  As described above, the valve lock device according to the present invention includes a base, mounting means for mounting the base to the valve box, and locking means mounted on the base for locking rotation of the lever handle. is there.

  According to the above configuration, since the rotation of the lever handle is locked by the locking means, it is possible to prevent the lever handle from being inadvertently or unintentionally colliding with the lever handle and being rotated. In addition, the valve lock device can be removably mounted on the valve box of the normal valve device by the mounting means, so that it is not necessary to incorporate a lock mechanism into the valve device. As a result, it is possible to prevent an increase in the size of the valve device and an increase in manufacturing cost.

  Incidentally, there is a case where it is not necessary to lock the valve device depending on the use of the user. In this case, if the lock mechanism is incorporated in the valve device itself, the lock mechanism is useless. On the other hand, it may not be necessary to lock the valve device until the user actually uses the valve device.

  On the other hand, since the lock device according to the present invention can be easily mounted on the valve box of the valve device already installed, it is possible to provide a lock mechanism for the valve device according to a user's request. To play.

  Further, in the valve lock device according to the present invention, in the above-described configuration, the lock means includes a rotation preventing means for preventing rotation of the lever handle, and a lock release position which is a position where the lock is not performed. And a biasing means for biasing the rotation preventing means to a blocking position for performing the rotation.

  Here, the rotation preventing means needs to be provided so as to be movable between the blocking position and the blocking releasing position, and as this moving method, an arbitrary moving method such as translational movement or rotational movement can be used. it can.

  According to the above configuration, the rotation preventing means is held at the blocking position by the urging force of the urging means. Therefore, when the user tries to rotate the lever handle, the user only has to move the rotation prevention means to the blocking release position against the urging force, and the rotation prevention of the lever handle can be consciously and promptly released. It works.

  Further, in the valve lock device according to the present invention, in the above-described configuration, the lock means may include a rotation preventing means for preventing rotation of the lever handle, and the rotation prevention from the blocking release position to the blocking position. Biasing means for biasing means, and holding means for holding the blocking means at the blocking release position, wherein the holding means releases the holding when the lever handle rotates and turns in a predetermined direction. Means.

  Here, the rotation preventing means needs to be provided so as to be movable between the blocking position and the blocking releasing position, and as this moving method, an arbitrary moving method such as translational movement or rotational movement may be used. Can be.

  In the present application, “blocking rotation” refers to blocking rotation in one direction, and “blocking rotation” refers to blocking rotation in both directions.

  According to the above configuration, when the lever handle rotates and turns in the predetermined direction, the holding of the rotation preventing means by the holding means is released. At this time, the rotation preventing means is quickly moved from the blocking release position to the blocking position by the biasing force of the biasing means, and blocks the rotation of the lever handle. Thereby, there is an effect that the rotation of the lever handle can be locked easily and quickly.

  Further, the rotation preventing means is held at the blocking position by the urging force of the urging means. Therefore, when the user attempts to rotate the lever handle, the user only has to move the blocking means to the blocking release position against the urging force, and the rotation blocking of the lever handle can be consciously and promptly released. This has the effect. Further, when the user rotates the lever handle, the blocking means is held at the blocking release position by the holding means, and returns to the original state. Therefore, when the lever handle faces the predetermined direction again, there is an effect that the rotation of the lever handle can be prevented.

[Embodiment 1]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The valve lock device according to the present invention is a valve device that opens and closes a flow path in the valve box by rotating a valve element in the valve box with a lever handle, and includes a ball valve, a gate valve, a cock, and a butterfly. The present invention is applicable to any valve device such as a valve.

  Drawing 1 shows each composition which disassembled the valve lock device of this embodiment. FIG. 2 shows a state in which the valve lock device in which the components shown in FIG. 1 are assembled is attached to the valve device. 2A shows the unlocked state where the lever handle 22 is unlocked, and FIG. 2B shows the locked state where the lever handle 22 is locked.

  In the following description, the direction of the valve lock device and the valve device will be referred to as “front” on the upper side in FIG. 2 and “upper” on the front side in FIG. The rotation direction (clockwise / counterclockwise) of the lever handle 22 and the operation lever 52 is the rotation direction viewed from above.

  As shown in FIG. 2, the valve device 20 has a configuration including a valve box 21 and a lever handle 22 for rotating a valve element (not shown) in the valve box 21. The lever handle 22 is provided with a projection 23 projecting from the opposite side of the handle.

  The valve lock device 10 of the present embodiment includes a substrate (base) 11, a U-shaped attachment member (attachment means) 12 for attaching the substrate 11 to the valve box 21 of the valve device 20, and a lever handle 22 of the valve device 20. The configuration includes a lock member (lock means) 13 for locking and a lock operation mechanism (lock means) 14 for operating the lock member 13 when the lever handle 22 rotates to the closed position. Hereinafter, each configuration will be described in detail in order.

  As shown in FIG. 2, the valve lock device 10 is provided from the front side to the right side of the lever handle 22. For this reason, the left side is cut out from the center of the rear part of the substrate 11 overlapping with the movable area of the lever handle 22 to form a notch 30. Further, through holes 31 and 32 through which both ends of the mounting member 12 penetrate are provided at the front center and the front left side of the substrate 11.

  A long hole 33 for attaching the lock member 13 so as to be slidable in the left-right direction extends in the left-right direction on the rear right side of the substrate 11. At the center of the substrate 11, a slot 34 in which a locking portion of the lock member 13 described later slides extends in the left-right direction, and communicates with the notch 30.

  A shaft pin 35, a stopper pin 36, a shaft hole 37, and a stopper 38 to which various components of the lock operation mechanism 14 are attached are provided on the right side of the substrate 11. The positional relationship of the components 35 to 38 on the substrate 11 will be described later.

  Next, screw threads are formed at both ends of the mounting member 12. The mounting member 12 has a central portion provided along the valve box 21, and both ends penetrate through holes 31 and 32 of the substrate 11 and are screwed together with nuts 40 and 41. Thereby, the substrate 11 is fixed to the valve box 21.

  Next, a plate portion 42 is provided on the lock member 13, and a through hole 43 through which a bolt 44 penetrates is provided on the right side of the plate portion 42. The bolt 44 penetrates through the through hole 43 of the plate portion 42 from above, screws or penetrates a nut 45 functioning as a spacer, penetrates the washer 46, penetrates the long hole 33 of the substrate 11, Screw with 48. Thereby, the lock member 13 is slidably attached in the longitudinal direction of the long hole 33 of the substrate 11, that is, in the left-right direction.

  Further, since the lock member 13 is attached to the substrate 11 by screwing the two nuts 47 and 48 to the bolt 44, the nut can be prevented from being strongly tightened. Thereby, the lock member 13 can be slid smoothly, and the distance between the plate portion 42 and the substrate 11 can be kept constant.

  Instead of screwing the two nuts 47 and 48 onto the bolt 44, the nut 48 may be welded to the bolt 44 at a predetermined interval so that the interval does not fluctuate. As described above, as long as the plate portion 42 is slidable with respect to the substrate 11 at a predetermined interval, any attaching means for attaching the plate portion 42 to the substrate 11 can be used.

  On the left side of the front end of the plate portion 42, a locking portion (rotation preventing means) 50 for locking the convex portion 23 of the lever handle 22 is provided. The locking portion 50 is provided to protrude downward from the plate portion 42, and is provided so as to slide in the slot 34 of the substrate 11 when the lock member 13 is attached to the substrate 11. Further, when the locking member 13 slides to the left with respect to the substrate 11, a part of the locking portion 50 protrudes from the notch portion 30, and when the locking member 50 slides to the right, the locking portion 50 is received in the slot 34. It is provided as follows.

  At the center of the plate portion 42, a contact pin 51 (holding means) is provided to protrude downward. The contact pin 51 is provided so as to contact a right end face of an operation lever described later when the lock member 13 slides rightward with respect to the substrate 11.

  Next, the lock operating mechanism 14 is provided with an operating lever (holding means) 52 and two torsion coil springs 53 and 54. The operation lever 52 is rotatably supported by the shaft pin 35 of the substrate 11.

  Further, the operating lever 52, the shaft pin 35, and the contacting member are arranged such that the operating lever 52 contacts the convex portion 23 of the lever handle 22 on the left end front surface and contacts the contact pin 51 of the lock member 13 on the right end surface. The contact pin 51 is arranged. The left end of the operating lever 52 is bent downward so as to easily contact the projection 23 of the lever handle 22, and the right end is rearward so as to easily contact the contact pin 51 of the lock member 13. Extending to the side.

  Further, a stopper pin 36 for preventing the operation lever 52 from rotating clockwise from a position where the longitudinal direction of the operation lever 52 is the left-right direction is provided near the left front of the shaft pin 35 on the substrate 11.

  Further, the torsion coil spring (holding means) 53 is arranged such that the coil portion is fitted to the shaft pin 35 and the operating lever 52 is fitted thereon. One end of the torsion coil spring 53 contacts the front surface of the right end of the operating lever 52, and the other end contacts the right side of the stopper pin 36. As a result, the torsion coil spring 53 urges the operating lever 52 clockwise.

  The torsion coil spring (biasing means) 54 has a bolt 55 penetrating the coil portion, and the bolt 55 passes through a shaft hole 37 formed on the right side of the through hole 32 and is screwed with a nut (not shown). are doing. One end of the torsion coil spring 54 contacts the right end of the locking portion 50 of the lock member 13, and the other end contacts the rear side of the stopper 38 provided on the right side of the shaft hole 37. Accordingly, the torsion coil spring 54 urges the lock member 13 to the left.

  In the above configuration, when the lever handle 22 is rotated from the direction shown in FIG. 2A to the direction shown in FIG. 2B, the projection 23 of the lever handle 22 comes into contact with the operation lever 52, The operation lever 52 rotates counterclockwise. As a result, the contact pin 51 of the lock member 13 is separated from the right end face of the operation lever 52, and the lock member 13 is moved leftward by the urging force of the torsion coil spring 54. At this time, the locking portion 50 of the lock member 13 projects from the cutout portion 30 of the substrate 11 and locks the convex portion 23 of the lever handle 22. As a result, the lever handle 22 is locked, so that careless movement is prevented.

  Next, the user moves the lock member 13 to the right. At this time, since the locking portion 50 of the lock member 13 is housed in the slot 34 of the substrate 11, the locked state of the lever handle 22 is released. When the lever handle 22 is rotated counterclockwise, the protrusion 23 of the lever handle 22 is separated from the operation lever 52. At this time, the urging force of the torsion coil spring 53 rotates the operating lever 52 clockwise, and the contact pin 51 of the lock member 13 contacts the right end surface of the operating lever 52. Thus, even if the user releases the lock member 13, the lock member 13 is held on the right side and returns to the state shown in FIG.

  Therefore, in the valve lock device 10 of the present embodiment, since the locking portion 50 of the lock member 13 prevents the rotation of the lever handle 22, a person or an object accidentally collides with the lever handle 22, and the lever handle 22 is moved. Rotation can be prevented. Further, since the valve lock device 10 is detachably attached to the valve box 21 of the normal valve device 20 by the attachment member 12, there is no need to incorporate a lock mechanism into the valve device 20. As a result, an increase in the size of the valve device 20 and an increase in manufacturing cost can be prevented.

  When the user tries to rotate the lever handle 22, the user moves the lock member 13 rightward against the urging force of the torsion coil spring 54 so that the locking portion 50 of the lock member 13 is housed in the slot 34. The rotation of the lever handle 22 can be consciously and promptly released.

  In addition, since the lock member 13 is disposed near the lever handle 22, for example, the lever handle 22 is grasped with the left hand in order, and the thumb of the left hand contacts the left end of the lock member 13 to move the lock member 13 rightward. By moving, the release of the lock and the rotation of the lever handle 22 can be easily performed with one hand.

  In the present embodiment, the locking portion 50 of the lock member 13 prevents the lever handle 22 from rotating counterclockwise. For example, the valve lock device 10 and the valve device 20 are configured as shown in FIG. When the operating lever 52 is operated to move the lock member 13 to the left in the state shown in FIG. 5, the locking portion 50 of the lock member 13 causes the lever handle 22 to rotate clockwise. Can be blocked. In this case, it is possible to prevent the valve device 20 from being carelessly closed.

  As described above, the valve lock device 10 of the present embodiment can prevent the lever handle 22 from rotating counterclockwise and clockwise, that is, by appropriately changing the lock operation mechanism 14.

[Embodiment 2]
Next, another embodiment of the present invention will be described with reference to FIGS. FIG. 3 shows each configuration in which the valve lock device of the present embodiment is disassembled, and FIG. 4 shows each configuration in which a lock member in the valve lock device is disassembled. Since the valve device to which the valve lock device of the present embodiment is attached has the same configuration as the valve device 20 shown in FIG. 2, the same reference numerals are given and the description thereof is omitted.

  FIGS. 5 to 8 show a state in which the valve lock device in which the components shown in FIGS. 3 and 4 are assembled is attached to the valve device. 5 and 6 show a state in which the lever handle 22 is rotated 45 degrees clockwise from the open position, and FIGS. 7 and 8 show a state in which the lever handle 22 is rotated 90 degrees clockwise to the closed position. The state has been reached. 8A shows a locked state where the lever handle 22 is locked, and FIG. 8B shows an unlocked state where the lever handle 22 is unlocked. .

  In the following, the directions of the valve lock device and the valve device will be referred to as “front side” in FIGS. 5 and 7 and “upper side” in the drawings. The rotation direction (clockwise / counterclockwise) of the lever handle 22 is a rotation direction viewed from above, and the rotation direction of the movable plate 90 of the lock member 63 described later is a rotation direction viewed from the rear.

  The valve lock device 60 of the present embodiment includes an inverted L-shaped substrate (base) 61, an attachment member (attachment means) 62 for attaching the substrate 61 to the valve box 21 of the valve device 20, and a lever handle 22 of the valve device 20. And a lock member (lock means) 63 for locking the lock. Hereinafter, each configuration will be described in detail in order.

  The substrate 61 has a front part and a right part. At the front of the substrate 61, through holes 70 and 71 through which bolts pass for mounting the mounting member 62 are provided. At the center of the right side of the substrate 61, an inclined groove 72 is provided for the movable plate of the lock member 63 to incline to the lower left. Further, through holes 73 to 76 through which bolts pass for attaching the lock member 63 are provided on the front side and the rear side of the right side of the substrate 61.

  Next, the attachment member 62 is a plate-shaped member formed in a U-shape, and has extension portions 80 and 81 that extend outward to be attached to the substrate 61 at both ends thereof. The extension portions 80 and 81 are provided with screw holes 82 and 83, respectively. The U-shaped central portion of the mounting member 62 is disposed along the valve box 21, and the bolt 84 penetrates the through hole 70 of the substrate 61 and is screwed into the screw hole 82 of the extending portion 80. Penetrates through hole 71 of substrate 61 and is screwed into screw hole 83 of extending portion 81. Thereby, the board 61 is fixed to the valve box 21. The screw holes 82 and 83 may be used as through holes, and the bolts 84 and 85 may be screwed together with nuts.

  Next, the lock member 13 includes a movable plate (rotation preventing means) 90, fixed plates 91 and 92 for rotatably supporting the movable plate 90, and a torsion coil spring (biasing) for biasing the movable plate 90 counterclockwise. (Means) 93. The movable plate 90 has an inclined portion 94 formed by cutting out a vertex at a lower left front portion. Further, shaft pins 95 and 96 serving as rotating shafts are protrudingly provided at the front central portion and the rear central portion of the movable plate 90, respectively.

  Further, the fixed plate 91 is disposed in front of the movable plate 90, and a fitting hole 97 is provided on the rear surface of the fixed plate 91, and the shaft pin 95 of the movable plate 90 is rotatable in the fitting hole 97. Mating. Further, the fixing plate 91 is provided with screw holes 98 and 99 for attaching to the substrate 61.

  Similarly, the fixed plate 92 is disposed behind the movable plate 90, and a fitting hole 100 is provided on the front surface of the fixed plate 92, and the shaft pin 96 of the movable plate 90 is rotatable in the fitting hole 100. Is fitted. Furthermore, the fixing plate 92 is provided with screw holes 101 and 102 for attaching to the substrate 61.

  Further, the torsion coil spring 93 has a coil portion fitted to the shaft pin 96, one end of which contacts the upper surface of the movable plate 90 on the left side, and the other end of which contacts the upper surface of the substrate 61. Accordingly, the torsion coil spring 93 urges the movable plate 90 counterclockwise.

  The lock member 63 having the above configuration is disposed on the upper surface of the substrate 61 such that the movable plate 90 is accommodated in the inclined groove 72 of the substrate 61.

  Next, the bolt 103 passes through the through hole 73 of the board 61 and is screwed into the screw hole 98 of the fixing plate 91, and the bolt 104 passes through the through hole 74 of the board 61 to the screw hole 99 of the fixing plate 91. Screw together. Thus, the fixing plate 91 is attached to the substrate 61. The screw holes 98 and 99 may be used as through holes, and the bolts 103 and 104 may be screwed together with nuts.

  Similarly, the bolt 105 passes through the through hole 75 of the substrate 61 and is screwed into the screw hole 101 of the fixing plate 92, and the bolt 106 passes through the through hole 76 of the substrate 61 to the screw hole 102 of the fixing plate 92. Screw together. Thus, the fixing plate 92 is attached to the substrate 61. The screw holes 101 and 102 may be used as through holes, and the bolts 105 and 106 may be screwed together with nuts.

  At this time, since the torsion coil spring 93 urges the movable plate 90 counterclockwise, the left side of the movable plate 90 is inclined downward and comes into contact with the convex portion 23 of the lever handle 22.

  In the valve device 20 and the valve lock device 60 having the above configurations, when the lever handle 22 rotates in the direction shown in FIG. 5, as shown in FIG. 90 abuts against the inclined portion 94. At this time, when a clockwise force is applied to the lever handle 22 against the urging force of the torsion coil spring 93, the movable plate 90 rotates and the inclined portion 94 moves upward, thereby further moving the lever handle 22. Can be rotated clockwise.

  When the lever handle 22 rotates in the direction shown in FIG. 7, the projection 23 of the lever handle 22 separates from the movable plate 90, and as shown in FIG. The movable plate 90 rotates, and the inclined portion 94 moves downward. At this time, since the convex portion 23 of the lever handle 22 contacts the rear surface of the movable plate 90, the lever handle 22 is prevented from rotating counterclockwise. As a result, the lever handle 22 is locked, so that careless movement is prevented.

  Next, when the user presses the right side of the movable plate 90 downward against the urging force of the torsion coil spring 93, the movable plate 90 rotates as shown in FIG. The inclined portion 94 moves upward. Thereby, the locked state of the lever handle 22 is released, and the lever handle 22 can be rotated counterclockwise.

  Therefore, in the valve lock device 60 of the present embodiment, since the movable plate 90 of the lock member 63 prevents the lever handle 22 from rotating leftward, a person or an object accidentally collides with the lever handle 22 and the lever handle 22 is moved. Rotation can be prevented. In addition, since the valve lock device 60 is detachably attached to the valve box 21 of the normal valve device 20 by the attachment member 62, there is no need to incorporate a lock mechanism into the valve device 20. As a result, an increase in the size of the valve device 20 and an increase in manufacturing cost can be prevented.

  When the user attempts to rotate the lever handle 22 counterclockwise, the user opposes the urging force of the torsion coil spring 54 so that the movable plate 90 of the lock member 63 rotates and the left side moves upward. By pressing the right side of the movable plate 90 downward, rotation inhibition of the lever handle 22 can be released consciously and promptly.

  In the valve lock device 60 of the present embodiment, when the lever handle 22 is rotated clockwise, the convex portion 23 of the lever handle 22 abuts on the inclined portion 94 of the movable plate 90 instead of the front surface of the movable plate 90. Clockwise rotation is not prevented. Therefore, there is no need to provide a holding means for holding the movable plate 90 at a blocking release position where rotation of the lever handle 22 is not blocked.

  Further, since the lock member 63 is disposed near the lever handle 22, for example, the lever handle 22 is squeezed with the right hand, and the little finger of the right hand pushes down the right side of the movable plate 90 to release the lock and the lever handle. The rotation of 22 can be easily performed with one hand.

  Lastly, the above embodiment does not limit the scope of the present invention, and various changes can be made within the scope of the present invention. For example, the following configuration can be adopted.

  In the above embodiment, when the lever handle 22 is in the closed position shown in FIGS. 2B and 7, the rotation of the lever handle 22 is prevented. However, the rotation of the lever handle 22 may be blocked when the lever handle 22 is in the open position shown in FIG. 2A, and the rotation of the lever handle 22 may be blocked at a predetermined rotation position.

  In the above embodiment, the protrusion 23 of the lever handle 22 to which the locking portion 50 of the lock member 13 and the movable plate 90 of the lock member 63 lock is provided on the opposite side of the handle of the lever handle 22. . However, the convex portion 23 of the lever handle 22 may be provided at an arbitrary position of the lever handle 22, and the lock member 13, the lock operating mechanism 14, and the lock member 63 may be provided according to the position.

  Further, the lock member 13 and the lock member 13 are locked so that the handle portion of the lever handle 22 is locked by the locking portion 50 of the lock member 13 and the movable plate 90 of the lock member 63 without providing the lever handle 22 with the convex portion 23. The operating mechanism 14 and the lock member 63 may be provided. Thus, any known means for preventing rotation of the lever handle 22 can be utilized.

  In the above embodiment, the torsion coil springs 54 and 93 are used as urging means for urging the lock members 13 and 63. However, a known elastic body such as a plate spring, a spring, and rubber can be used. .

  INDUSTRIAL APPLICABILITY As described above, the valve lock device according to the present invention is useful as a device for preventing a lever handle of a valve device from rotating carelessly, and is particularly used for a valve device having no valve lock mechanism. Suitable for.

1 is an exploded view showing a schematic configuration of a valve lock device according to an embodiment of the present invention. It is a top view showing the state where the above-mentioned valve lock device was attached to the valve device, the figure (a) shows the state where the lever handle is in the open position, and the figure (b) shows the lever handle in the closed position. And locked. FIG. 7 is an exploded view showing a schematic configuration of a valve lock device according to another embodiment of the present invention. FIG. 3 is an exploded view showing a schematic configuration of a lock member in the valve lock device. It is a top view showing the state where the above-mentioned valve lock device was attached to the valve device, and has shown the state where the lever handle rotated 45 degrees clockwise from the open position. FIG. 6 is a sectional view taken along line AA shown in FIG. 5 and viewed from the direction of the arrow. It is a top view showing the state where the above-mentioned valve lock device was attached to the valve device, and has shown the state where the lever handle rotated 90 degrees clockwise from the open position to the closed position. FIG. 8 is a cross-sectional view taken along the line AA shown in FIG. 7 and viewed from the direction of the arrow. FIG. 7A shows a state where the lever handle is locked, and FIG. This shows the unlocked state in which the lock has been released.

Explanation of reference numerals

10.60 Valve lock device 11.61 Substrate (base)
12.62 attachment member (attachment means)
13.63 Locking member (locking means)
14 Lock operation mechanism (lock means)
DESCRIPTION OF SYMBOLS 20 Valve apparatus 21 Valve box 22 Lever handle 50 Locking part (rotation prevention means)
51 Contact pin (holding means)
52 Operating lever (holding means)
53 torsion coil spring (holding means)
54 torsion coil spring (biasing means)
90 movable plate (rotation preventing means)
93 Torsion coil spring (biasing means)

Claims (3)

A valve that locks the rotation of the valve body by locking the rotation of the lever handle to a valve device that opens and closes a flow path in the valve box by rotating a valve body in the valve box with a lever handle. A locking device,
A substrate;
Mounting means for mounting the base to the valve box;
A valve lock device attached to the base and locking the rotation of the lever handle. The lock means,
Rotation prevention means for preventing rotation of the lever handle;
2. The valve lock device according to claim 1, further comprising an urging unit that urges the rotation preventing unit from a blocking release position that is a position where the blocking is not performed to a blocking position that performs the blocking. 3. The lock means,
Rotation prevention means for preventing rotation of the lever handle;
Urging means for urging the rotation preventing means from a blocking release position which is a position where the blocking is not performed to a blocking position where the blocking is performed;
A holding means for holding the blocking means at the blocking release position, wherein the holding means releases the holding when the lever handle rotates and faces a predetermined direction. Item 2. The valve lock device according to Item 1.

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