JP4272509B2 - Locking device for valve operating member - Google Patents

Description

  The present invention relates to a lock for a valve operating member that is used to prevent the operation of a valve operating member for operating a valve provided in the middle of a conduit through which a fluid flows and to maintain the open or closed state of the valve. It relates to the device.

  A valve provided in the middle of a pipe for flowing a fluid, for example, a meter gas stopper provided in the middle of a gas supply pipe, has a gas stopper lever (hereinafter simply referred to as a “lever” as a valve operating member for opening and closing the meter gas stopper. ”) Is rotatably provided. When the gas supply to the consumer is stopped, the gas supply company visits the consumer's house and performs a sealing operation for prohibiting the lever operation. In this sealing operation, the lever is turned to close the meter gas stopper, and the wire is sealed through a wire in a sealing hole formed in the meter gas stopper. On the other hand, when the gas supply to the consumer is resumed, the gas supply company visits the customer's house and performs an opening operation to open the meter gas plug. In this opening operation, the wire for sealing is cut and the lever is turned to open the meter gas stopper.

  As described above, since it was necessary to repeatedly stop the gas supply by the sealing operation and restart the gas supply by the plugging operation, the operation of the lever can be surely prevented and a series of operations accompanying the stop and restart of the gas supply can be prevented. Simplification is required.

  The present invention has been made to meet the above-described demand, and an object of the present invention is to provide a valve operating member locking device that can reliably prevent the operation of the valve operating member while easily releasing the blocking.

To achieve the above object, the present invention provides a valve operating member locking device for blocking the operation of a valve operating member for operating a valve provided in the course of a fluid channel.
A case member which is arranged at a position where the valve is provided and is configured to be freely opened and closed;
Attachment means for attaching the case member to the pipe line;
Limiting means for preventing the operation of the valve operating member in the closed state of the case member, and allowing the operation of the valve operating member in the open state;
A dial lock that can be switched from the locked state to the unlocked state by matching the unlock number,
The case member only contains a locking means for locking in the closed state, the at the time of locking of the dial lock,
The locking means is a first locking member movable between a holding position for holding the closed state of the case member and a release position for releasing the holding of the closed state;
A second lock member for locking the first lock member to the holding position when the dial lock is locked;
A valve operating member locking device comprising: a movement operating member that is operated when the first locking member is moved between the holding position and the release position .

  Compared with the case of sealing with a conventional wire, the operation of the valve operating member can be reliably prevented. Further, the blocking of the operation of the valve operating member can be easily canceled simply by unlocking the dial lock and opening the case member.

  When using the locking device for the valve operating member, the administrator who has blocked the operation of the valve operating member by managing the unlocking number of the dial lock as an encryption number informs others of the unlocking number of the dial locking member. Thus, it is possible to request the other person to resume the operation of the valve operating member, and it becomes unnecessary for the administrator himself to perform the operation of resuming the operation of the valve operating member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an embodiment of a locking device 10 for a valve operation member according to the present invention, and FIG. 2 is a view showing a valve operation in a state where the operation of the valve operation member 13 is permitted with the case member 20 opened. FIG. 3 is a view showing the member locking device 10, FIG. 3 is a view showing the valve operating member locking device 10 in a state where the case member 20 is closed and the operation of the valve operating member 13 is blocked, and FIG. 4 is an outer cover. FIG. 5 is a side view of FIG. 4, illustrating the valve operating member locking device 10 in a state in which the surface 22 b of the second case is covered with 23. FIG. 6 shows the wedge member 32 and the abutting member 31 in the attachment means 30 for attaching the case member 20 to the pipe line 11, and each of FIGS. 6A to 6C is a plan view showing the wedge member 32. FIG. 6B is a cross-sectional view taken along the line 6C-6C in FIG. 6B. FIGS. 6D to 6F are a plan view, a front view, and a front view of FIG. It is sectional drawing which follows a 6F-6F line. FIGS. 7A and 7B are views for explaining the operation of attaching the case member 20 to the pipe line 11 by the attaching means 30. FIG. 7A shows a state before attachment, and FIG. It is a schematic sectional drawing which shows a back state. FIG. 8 is a schematic cross-sectional view showing a state in which the case member 20 is attached to different types of pipes 11 by the attaching means 30. FIGS. 9 and 10 are diagrams for explaining the unlocking of the dial lock 50, FIGS. 11 and 12 are diagrams for explaining the locking of the dial lock 50, and FIGS. It is a figure where it uses for description.

  The valve operating member locking device 10 according to the present invention prevents the operation of the valve operating member 13 for operating the valve 12 provided in the middle of the conduit 11 through which the fluid flows, and opens or closes the valve 12. Used to maintain state. In this embodiment, a lever 13 (corresponding to a valve operating member) for opening and closing a meter gas plug 12 (corresponding to a valve) provided in the middle of a gas supply pipe 11 (corresponding to a conduit for flowing fluid). Will be described as an example. Moreover, the case where it uses in order to maintain the closed state of the meter gas stopper 12 is mentioned as an example, and is demonstrated.

  In summary, the valve operating member locking device 10 is arranged at a position where the meter gas plug 12 is provided and is configured to be freely opened and closed, and the case member 20 is connected to the gas supply pipe 11 and / or the meter gas plug. 12, an attaching means 30 attached to 12, a movement of the lever 13 in the closed state of the case member 20, while a restricting means 40 that allows the operation of the lever 13 in the opened state, and a locked state by matching the unlocking number Dial lock 50 that can be switched to the unlocked state, and lock means 60 that locks case member 20 to the closed state when dial lock 50 is locked. By locking the dial lock 50 with the case member 20 in the closed state, the locking means 60 locks the case member 20 in the closed state, and the limiting means 40 prevents the lever 13 from moving. The valve operating member locking device 10 further allows the case member 20 to be opened by forcibly releasing the locking of the case member 20 by the locking means 60 when the dial lock 50 is locked. The release means 70 is included. Details will be described below.

  The case member 20 includes an attachment base 21 (corresponding to a first case) attached to the gas supply pipe 11 and / or the meter gas plug 12 by an attachment means 30 described later with reference to FIGS. 21 and a main cover 22 (corresponding to a second case) that is connected to the door 21 and is openable and closable. The case member 20 further includes an outer cover 23 that is openably and closably connected to the main cover 22 and covers the surface 22b of the main cover 22. The attachment base 21, main cover 22 and outer cover 23 are connected to each other via a hinge 24 so as to be openable and closable. 2 shows a state where the main cover 22 is opened, FIG. 3 shows a state where the main cover 22 is closed, and FIG. 4 shows a state where the outer cover 23 is closed.

  The mounting base 21 has a substantially cylindrical shape with both ends open (see also FIG. 5), and is formed in a shape that can be put on the meter gas plug 12 while being inserted through the lever 13. As a result, the valve operating member locking device 10 can be retrofitted to the meter gas plug 12 of the existing gas supply pipe 11.

  The main cover 22 has a cup shape that closes the opening of the mounting base 21 (see also FIG. 5), and a dial lock 50 is attached to the bottom surface 22a (the surface that appears in FIG. 2). A window 25 on which the dial 51 of the dial lock 50 faces is formed on the surface 22b (the surface appearing in FIG. 3) of the main cover 22.

  The outer cover 23 covers the surface 22b of the main cover 22 and hides the dial lock 50 to enhance the beauty (see FIG. 4). Further, the outer cover 23 prevents dust and the like from entering the dial lock 50 through the window 25.

  The material of the mounting base 21 and the main cover 22 is not particularly limited, but from the viewpoint of ensuring weight reduction and strength, a resin containing various reinforcing fillers such as glass fibers, such as PA6 (nylon 6) resin, etc. Can be used. The material of the outer cover 23 is not particularly limited, but a resin such as an ABS resin can be used from the viewpoint of weight reduction. In order to extend the life in consideration of environmental influences (rain, ultraviolet rays, etc.) for installation outdoors, a die-cast product made of metal, for example, aluminum, can also be used.

  As shown in FIGS. 1 and 5, the limiting means 40 includes a notch 41 formed in the main cover 22 and into which a part of the lever 13 enters when the main cover 22 is closed with respect to the mounting base 21. ing. When the case member 20 is closed, that is, when the main cover 22 is closed with respect to the mounting base 21, the side surface of the lever 13 comes into contact with the inner side surface of the notch 41, thereby preventing the operation of the lever 13. On the other hand, when the case member 20 is opened, that is, when the main cover 22 is opened with respect to the mounting base 21, the notch 41 forming the restricting means 40 is separated from the lever 13, so that the operation of the lever 13 is allowed.

  As shown in FIGS. 2, 6 and 7, the attachment means 30 is disposed along the inner peripheral surface of the attachment base 21, and a contact surface 31 a that contacts the casing outer peripheral surface 12 a of the meter gas plug 12 is formed. A fixed guide 31 (corresponding to a contact member) provided so as to be movable forward and backward with respect to the casing outer peripheral surface 12a, and by approaching the fixed guide 31 relatively, the fixed guide 31 is directed toward the casing outer peripheral surface 12a. A wedge member 32 to be moved, and a biasing member 33 that biases the fixed guide 31 with a force that presses against the casing outer peripheral surface 12a by bringing the wedge member 32 relatively close to the fixed guide 31 are included. In the illustrated example, a pair of attachment means 30 are arranged at axially symmetric positions, and the attachment base 21 is attached to the gas supply pipe 11 by sandwiching the meter gas stopper 12 from both sides in the radial direction. The meter gas plug 12 of the illustrated example is provided with a projecting piece 12b that protrudes radially outward from the casing outer peripheral surface 12a (see FIG. 7).

  As shown in FIGS. 6D, 6E, and 6F, the fixed guide 31 has an arcuate contact surface 31a, a tapered surface 31b formed on the back side of the contact surface 31a, and a tapered surface 31b. It has a guide hole 31c having a long hole shape formed therethrough and a guide plate 31d formed at the bottom on the back side. On the surface of the contact surface 31a, there is formed a recess 31e that receives the protruding piece 12b of the meter gas plug 12 when pressed against the casing outer peripheral surface 12a. As shown in FIG. 7, a through hole 21a is formed in the side wall of the mounting base 21, and a guide plate 31d is slidably inserted into the through hole 21a.

  As shown in FIGS. 6A, 6B, and 6C, the wedge member 32 has a tapered surface 32a having an inclination angle matching the tapered surface 31b of the fixed guide 31 and the inner peripheral surface of the mounting base 21. And a slidable outer peripheral surface 32b and a through hole 32c formed through the tapered surface 32a.

  As shown in FIG. 7, the urging member 33 has a screw 33 a that is inserted into the guide hole 31 c of the fixed guide 31 and the through hole 32 c of the wedge member 32. The tip of the screw 33a passes through the screw insertion hole 21b formed in the mounting base 21, and is screwed into the nut 33b. The nut 33b is held in a holding portion 21c provided on the mounting base 21 so as not to rotate. The fixed guide 31 in which the screw 33a is inserted into the guide hole 31c can move forward and backward along the radial direction with respect to the casing outer peripheral surface 12a, and the wedge member 32 in which the screw 33a is inserted into the through hole 32c is in the vertical direction in FIG. It will be movable only to. As the screw 33a, it is preferable to use a special screw 33a that cannot be turned by a general screwdriver.

  The material of the fixed guide 31 and the wedge member 32 is not particularly limited. However, since the wedge member 32 has a structure in which the fixed guide 31 is pressed and pressed against the outer peripheral surface 12a of the casing, both are not easily deformed. is required. Therefore, from the viewpoint of ensuring weight reduction and strength, for example, PA6 (nylon 6) resin, polyacetal (POM) resin, or the like can be used. A die-cast product made of metal, for example, aluminum can also be used. An elastic body such as rubber may be provided on the contact surface 31 a of the fixed guide 31.

  When the attachment base 21 is attached to the gas supply pipe 11, as shown in FIGS. 7A and 7B, the screw 33 a is tightened to move the wedge member 32 downward in the figure, and the fixed guide 31 is attached. Move closer. Then, the fixed guide 31 with which the wedge member 32 abuts via the taper surfaces 31 b and 32 a moves forward along the radial direction toward the casing outer peripheral surface 12 a of the meter gas plug 12. When the screw 33a is further tightened, the contact surface 31a of the fixed guide 31 contacts the casing outer peripheral surface 12a. As a result, a force that presses against the casing outer peripheral surface 12 a is urged to the fixed guide 31, and the attachment base 21 is attached to the gas supply pipe 11. At this time, the projecting piece 12b of the meter gas plug 12 is received in the recess 31e of the abutting surface 31a, and therefore does not hinder the attachment of the attachment base 21.

  FIG. 8 shows a state in which the attachment base 21 is attached to another type of meter gas plug 14 having a different tube diameter and outer diameter dimension of the casing by the attachment means 30 described above. The protruding piece 12b is not provided on the casing outer peripheral surface 14a of the meter gas plug 14. Since the fixed guide 31 can move forward and backward with respect to the outer peripheral surface 14a of the casing, as shown in FIG. 8, even if the outer diameter dimensions of the casing are different, the moving amounts of the fixed guide 31 and the wedge member 32 are different. The attachment base 21 can be securely attached to the gas supply pipe 11. As described above, the mounting base 21 having the same configuration can be attached to the meter gas plugs 12 and 14 having various types depending on the pipe diameter, the outer diameter of the casing, the presence or absence of the projecting piece 12b, and the like. The versatility of the apparatus 10 can be improved.

  Of course, it is possible to prepare a plurality of fixed guides 31 having different shapes of the contact surfaces 31a and use them separately according to the meter gas plugs 12 and 14 to be attached.

  The dial lock 50 is attached to the bottom surface 22a of the main cover 22 as shown in FIG. 2, and the dial 51 faces the window 25 on the surface 22b of the main cover 22 as shown in FIG. In the illustrated example, a quadruple dial lock 50 in which four dials 51 are arranged is used. The number of dials 51 is not limited to four as illustrated, and may be three, five, and the like. The dial lock 50 has a lock piece 52 that protrudes from the dial lock 50 at the time of locking (see FIGS. 2 and 11, etc.). The dial lock 50 is provided so that each dial 51 has a sleeve that rotates together with the dial 51 and has an engagement recess formed on the outer peripheral surface thereof, and a bolt having a lock piece 52 at the tip abuts the outer peripheral surface of the sleeve. It is biased by a bolt spring. When a portion other than the engagement concave portion of the sleeve is in contact with the bolt, the bolt projects the lock piece 52 against the elastic force of the bolt spring. On the other hand, when the engagement concave portions of all the sleeves are in contact with the bolt, the bolt retracts the lock piece 52 by the elastic force of the bolt spring.

  The dial lock 50 can be freely changed in unlock number. When changing the unlock number, each dial 51 is set to an arbitrary number in a state in which the shift lever 53 is pushed and the engagement between the sleeve and the dial 51 is released at the time of unlocking. Thereafter, when the shift lever 53 is returned, the newly set number becomes the subsequent unlock number.

  As shown in FIG. 2, the locking means 60 is a main cam 61 (corresponding to a first locking member) movable between a holding position for holding the closed state of the case member 20 and a release position for releasing the holding of the closed state. A sub cam 62 (corresponding to a second lock member) that locks the main cam 61 in the holding position when the dial lock 50 is locked, and a lever that is operated when the main cam 61 is moved between the holding position and the release position. And a member 63 (corresponding to a movement operation member).

  The lock means 60 further includes a release means 70 that forcibly releases the lock of the main cam 61 by the sub cam 62 and allows the main cam 61 to move to the release position when the dial lock 50 is locked. The release means 70 of the present embodiment is composed of a cylinder lock 71 (see FIG. 3) that connects and disconnects the main cam 61 and the sub cam 62.

  As shown in FIGS. 9 to 14, the main cam 61 has a rotatable arm shape and is rotatably attached to the main cover 22. The mounting base 21 is provided with a tongue-shaped engaging portion 21d (see also FIG. 2), and when the main cam 61 is rotated, the engaging base 21 engages with the engaging portion 21d (see FIG. 12). This rotational position of the main cam 61 becomes a holding position for engaging the engaging portion 21d and holding the closed state of the case member 20. When the main cam 61 is rotated 90 degrees from the holding position, the engagement with the engaging portion 21d is released (see FIGS. 10 and 14). This rotational position of the main cam 61 becomes a release position for releasing the holding of the case member 20 in the closed state.

  The sub cam 62 has a rotatable arm shape and is rotatably attached to the main cover 22. The sub cam 62 engages with a lock piece 52 protruding from the dial lock 50 when the dial lock 50 is locked (see FIGS. 11 to 14). The sub cam 62 releases the engagement with the lock piece 52 when the dial lock 50 is unlocked (see FIGS. 9 and 10).

  The main cam 61 and the sub cam 62 are rotatably arranged on the same axis. A cylinder lock 71 is housed and fixed in the base end portion 61 a of the main cam 61. A lever member 63 is attached to the outer peripheral surface of the base end portion 61 a of the main cam 61. The lever member 63 passes through a hole 22c formed in the main cover 22 and protrudes to the outside (see FIGS. 1 and 5). By operating the lever member 63, the main cam 61 can be moved between the holding position and the release position.

  By locking the cylinder lock 71, a dead bolt (not shown) of the cylinder lock 71 protrudes into an engagement recess (not shown) of the sub cam 62, the main cam 61 and the sub cam 62 are connected, and both members are integrally formed. Rotate. Therefore, when the dial lock 50 is locked and the lock piece 52 is engaged with the sub cam 62, the sub cam 62 cannot rotate, and the main cam 61 connected to the sub cam 62 cannot rotate (see FIGS. 11 and 12). On the other hand, when the cylinder lock 71 is unlocked, the dead bolt is retracted from the engaging recess, and the connection between the main cam 61 and the sub cam 62 is released. Thereby, even when the dial lock 50 is locked, that is, when the sub cam 62 cannot be rotated, the main cam 61 released from the connection with the sub cam 62 is allowed to rotate independently to the release position (FIGS. 13 and 13). 14). A key 72 is used to lock and unlock the cylinder lock 71.

  Next, the operation of this embodiment will be described.

  First, when the main cover 22 is closed and locked to the mounting base 21, the dial lock 50 is unlocked. It is assumed that the cylinder lock 71 is locked. The dial lock 50 is unlocked by matching the dial 51 with the unlock number. When the dial lock 50 is unlocked, the lock piece 52 is retracted, and the engagement with the sub cam 62 is released (FIG. 9A). By turning the lever member 63, the main cam 61 is rotated from the holding position to the release position (FIG. 9B). When the main cam 61 rotates to the release position, the engagement with the engaging portion 21d of the mounting base 21 is released (FIGS. 10A and 10B), and the main cover 22 can be opened.

  The main cover 22 is opened, and the mounting base 21 is put on the meter gas plug 12 while being inserted through the lever 13 (FIG. 2). Thereafter, the attachment base 21 is attached to the gas supply pipe 11 by the attachment means 30. As shown in FIGS. 7A and 7B, the screw 33 a is tightened to move the wedge member 32 downward in the drawing so as to approach the fixed guide 31. Then, the fixed guide 31 moves forward along the radial direction toward the casing outer peripheral surface 12 a of the meter gas plug 12. When the screw 33a is further tightened, the contact surface 31a of the fixed guide 31 contacts the casing outer peripheral surface 12a. As a result, a force that presses against the casing outer peripheral surface 12 a is urged to the fixed guide 31, and the attachment base 21 is attached to the gas supply pipe 11. At this time, the projecting piece 12b of the meter gas plug 12 is received in the recess 31e of the abutting surface 31a, and therefore does not hinder the attachment of the attachment base 21.

  When changing the unlock number of the dial lock 50, the dial 51 is set to an arbitrary number by pushing the shift lever 53 when unlocking. When the shift lever 53 is returned, the newly set number becomes the subsequent unlock number. Since the unlocking number can be changed with the mounting base 21 attached to the meter gas stopper 12, the valve operating member locking device 10 can be used repeatedly.

  After turning the lever 13 to close the meter gas plug 12, the main cover 22 is closed (FIGS. 2 and 3). A part of the lever 13 enters the notch 41 of the main cover 22. The lever member 63 is rotated (FIG. 3), and the main cam 61 is rotated from the release position to the holding position (FIG. 11 (B)). When the main cam 61 rotates to the holding position, the main cam 61 is engaged with the engaging portion 21d of the mounting base 21, and the closed state of the main cover 22 is held (FIGS. 12A and 12B).

  Thereafter, the dial lock 50 is locked. The dial lock 50 is locked by setting the dial 51 to a number other than the unlock number. When the dial lock 50 is locked, the lock piece 52 protrudes and engages with the sub cam 62 (FIG. 11A). When the lock piece 52 is engaged with the sub cam 62, the sub cam 62 cannot be rotated, and the main cam 61 connected to the sub cam 62 is locked at the holding position and cannot be rotated. Thereby, the closed state of the main cover 22 is locked. Even if the lever 13 is to be rotated in this state, the side surface of the lever 13 comes into contact with the inner side surface of the notch 41, and therefore the operation of the lever 13 is blocked.

  After locking the dial lock 50, the outer cover 23 is closed and the surface 22b of the main cover 22 is covered. The dial lock 50 is hidden by the outer cover 23 to enhance the aesthetics, and dust or the like is prevented from entering the dial lock 50.

  When the meter gas stopper 12 is opened, as described above, the main cover 22 can be opened by unlocking the dial lock 50. When the main cover 22 is opened, the notch 41 is separated from the lever 13, so that the operation of the lever 13 is allowed. Therefore, the meter gas plug 12 can be opened by turning the lever 13.

  When the unlocking number of the dial lock 50 is forgotten, the cylinder lock 71 is unlocked using the key 72 in order to forcibly release the locked state. When the cylinder lock 71 is unlocked, the connection between the main cam 61 and the sub cam 62 is released, and even when the dial lock 50 is locked, that is, when the sub cam 62 cannot be rotated, the connection with the sub cam 62 is released. It can be rotated to a position (FIGS. 13 and 14). When the main cam 61 rotates to the release position, the engagement with the engaging portion 21d of the attachment base 21 is released (FIGS. 14A and 14B), and the main cover 22 can be opened. Thereafter, the unlock number of the dial lock 50 may be changed.

  As described above, in the valve operating member locking device 10 of the present embodiment, the notch 41 as the restricting means 40 is formed in the main cover 22 that is locked in the closed state by locking the dial lock 50. As a result, the operation of the lever 13 can be reliably prevented and the closed state of the meter gas plug 12 can be maintained as compared with the case of sealing with a conventional wire. Moreover, the unlocking of the operation of the lever 13 can be easily performed simply by unlocking the dial lock 50 and opening the main cover 22.

  Further, since the release means 70 that can force the main cover 22 to be opened when the dial lock 50 is locked is provided, even when the unlock number of the dial lock 50 is unknown, the blocking of the operation of the lever 13 is canceled. Can do.

  The use of the valve operating member locking device 10 has the following advantages. That is, by managing the unlocking number of the dial lock 50 as an encryption number, the administrator who has blocked the operation of the valve operating member 13 notifies the unlocking number of the dial lock 50 to the other person, The operation of the valve operating member 13 can be requested to be resumed, and it is unnecessary for the administrator himself to perform the operation of resuming the operation of the valve operating member 13. In the example of the above embodiment, the gas supplier performs only the sealing work that prohibits the operation of the lever 13, and the opening work is performed by informing the customer of the unlocking number of the dial lock 50. Can be requested. When the sealing operation is performed again on the same lever 13, the gas supply company can reliably prevent the operation of the lever 13 by changing the unlocking number of the dial lock 50. If the customer can open the meter gas plug 12 in this way, the gas supply operator does not need to open the plug, and the customer opens the plug without waiting for the gas supplier to visit. This has the advantage of increasing convenience.

(Modification example)
Although the valve operating member locking device 10 according to the present invention has been described based on the embodiment applied to block the operation of the lever 13 of the meter gas plug 12, the present invention is not limited to this case. The present invention can be widely applied to prevent the operation of the valve operating member 13 for operating the valve 12 provided in the middle of the conduit 11 through which the fluid flows. For example, the valve operating member locking device 10 may be attached to a valve included in a machine or facility and used to limit the operating authority of the valve operating member. Moreover, it cannot be overemphasized that it can be used not only when using it to maintain the closed state of the valve 12, but also maintaining the open state of the valve 12.

  Although the notch 41 formed in the main cover 22 is shown as the restricting means 40, the restricting means 40 prevents the operation of the valve operating member 13 in the closed state of the case member 20, while the operation of the valve operating member 13 in the open state. Can be appropriately modified within the range that permits the above. For example, when the case member 20 is set to have a shape surrounding the entire valve operating member 13, the case member 20 itself functions as the limiting means 40. In addition, a restricting means 40 such as a hook for preventing the operation of the valve operating member 13 is provided not on the main cover 22 side but on the mounting base 21 side so that the hook cannot be operated from the outside when the main cover 22 is closed. You may comprise.

  The valve operating member 13 is not limited to a relatively long and narrow one like the gas plug lever 13, but may be a ring shape, a knob shape, etc. By modifying the configuration of the limiting means 40 as described above, It is possible to prevent the operation of the valve operating member 13 having various forms.

  As the dial lock 50, a form in which a plurality of dials 51 are arranged in parallel is shown, but it is needless to say that various forms such as a knob shape rotatable in the left-right direction can be adopted. In addition, the “dial lock” in this specification means a lock that can be unlocked by matching a code such as a number or a character with a specific code, that is, all locks that can be unlocked without using a key. Must be understood.

  The movement operation member 63 of the lock means 60 is not limited to the illustrated lever member 63, and may be a button shape, a knob shape, or a plate shape as long as the first lock member 61 can be operated when moving between the holding position and the release position. An appropriate shape can be selected.

  As a further modification of the present invention, the case member 20 configured to be openable and closable can be configured of first and second cases 21 and 22 that are openable and closable and detachable from each other. For example, a configuration in which a hinge portion that connects the first case and the second case 22 so as to be freely opened and closed is provided in a dismountable manner, or a slider to which the second case 22 is rotatably connected is inserted into the first case and the slider is moved. For example, the first case can be detachably fixed. In the configuration in which the first and second cases 21 and 22 are detachable from each other, the second case 22 can be extracted from the first case 21 with the second case 22 opened with respect to the first case 21. It is preferable to provide a mechanism. In addition, a mechanism for preventing / permitting the attachment / detachment between the first and second cases 21 and 22 can be added in conjunction with the locking / unlocking of the cylinder lock 71 constituting the release means 70.

  The present invention can be applied to an apparatus used for preventing the operation of a valve operating member for operating a valve provided in the middle of a conduit through which a fluid flows to maintain an open state or a closed state of the valve.

It is a perspective view showing one embodiment of a locking device for valve operation members concerning the present invention. It is a figure which shows the locking device for valve operation members in the state in which the case member was opened and operation | movement of the valve operation member was permitted. It is a figure which shows the locking device for valve operating members in the state in which the case member was closed and operation | movement of the valve operating member was prevented. It is a figure which shows the locking device for valve operation members in the state which covered the surface of the 2nd case with the outer cover. FIG. 5 is a side view of FIG. The wedge member and the contact member in the attachment means for attaching the case member to the pipe line are shown. FIGS. 6 (A) to 6 (C) are respectively a plan view, a front view, and FIG. 6 (B) showing the wedge member. 6C-6C is a sectional view taken along the line 6C-6C, and FIGS. 6D to 6F are a plan view showing a contact member, a front view, and a sectional view taken along the line 6F-6F in FIG. It is a figure where it uses for description of the effect | action which attaches a case member with respect to a pipe line by an attachment means, FIG. 7 (A) is a schematic sectional drawing which shows the state after attachment, FIG. It is a schematic sectional drawing which shows the state which attached the case member with respect to the pipe line from which a kind differs by the attachment means. FIGS. 9A and 9B are diagrams for explaining the unlocking of the dial lock. FIGS. 10A and 10B are views for explaining the unlocking of the dial lock. 11 (A) and 11 (B) are diagrams used for explanation when the dial lock is locked. 12 (A) and 12 (B) are diagrams used for explanation when the dial lock is locked. FIGS. 13A and 13B are diagrams for explaining the forced release. FIGS. 14A and 14B are diagrams for explaining the forced release.

Explanation of symbols

10 Locking device for valve operating member,
11 Gas supply pipe (pipe),
12 Meter gas valve (valve),
12a casing outer peripheral surface,
13 Gas stopper lever (valve operating member),
20 Case member,
21 Mounting base (first case),
21d engaging portion,
22 Main cover (second case),
22b surface,
23 Outer cover,
30 mounting means,
31 Fixed guide (contact member),
31a abutting surface,
31b taper surface,
31e recess,
32 wedge member,
32a taper surface,
33 biasing member,
33a screw,
40 limiting means,
41 Notch (limitation means),
50 dial lock,
51 dial,
52 Lock piece,
60 locking means,
61 Main cam (first locking member),
62 Sub cam (second locking member),
63 Lever member (moving operation member),
70 release means,
71 Cylinder lock (release means).

Claims (11)

A valve operating member locking device for blocking the operation of a valve operating member (13) for operating a valve (12) provided in the middle of a conduit (11) through which a fluid flows,
A case member (20) arranged at a position where the valve (12) is provided and configured to be openable and closable;
Attachment means (30) for attaching the case member (20) to the conduit (11) and / or the valve (12);
Limiting means (40) that prevents the operation of the valve operating member (13) in the closed state of the case member (20), while allowing the operation of the valve operating member (13) in the open state;
A dial lock (50) that can be switched from the locked state to the unlocked state by matching the unlock number;
Wherein the combination lock locking means said casing member during locking of the (50) (20) is locked in the closed state (60), only contains,
The locking means (60)
A first lock member (61) movable between a holding position for holding the closed state of the case member (20) and a release position for releasing the holding of the closed state;
A second lock member (62) for locking the first lock member (61) to the holding position when the dial lock (50) is locked;
A valve operating member locking device comprising: a movement operating member (63) that operates when the first locking member (61) is moved between the holding position and the release position . When the dial lock (50) is locked, the lock of the first lock member (61) by the second lock member (62) is forcibly released so that the first lock member (61) is in the release position. 2. The locking device for a valve operating member according to claim 1, further comprising release means (70) that permits movement of the valve operating member. The said release means (70) is comprised from the cylinder lock (71) which performs connection and a connection cancellation | release with the said 1st lock member (61) and a said 2nd lock member (62). 3. A locking device for a valve operating member according to 2 . The first lock member (61) and the second lock member (62) are arranged coaxially and rotatably.
The first lock member (61) and the second lock member (62) are connected by locking the cylinder lock (71) to rotate both members integrally, while the cylinder lock (71) is unlocked. When the dial lock (50) is locked, the first lock member (61) is rotated to the release position by unlocking the connection between the first lock member (61) and the second lock member (62). the valve operating member for the locking device according to claim 3, characterized in that permits to dynamic. The first lock member (61) has a rotatable arm shape, and engages with an engagement portion (21d) provided in the case member (20) when rotated to the holding position, 2. The valve operating member locking device according to claim 1, wherein the engagement with the engaging portion (21 d) is released when the valve operating member is rotated to a release position . The second lock member (62) has a rotatable arm shape and engages with a lock piece (52) protruding from the dial lock (50) when the dial lock (50) is locked, 2. The locking device for a valve operating member according to claim 1, wherein the engagement with the lock piece (52) is released when the lock (50) is unlocked . The case member (20) has a first case (21) attached to the pipe (11) and / or the valve (12) by the attachment means (30), and the first case (21). A second case (22) that is openably and closably connected and in which the dial lock (50) is disposed,
The limiting means (40) is formed in the second case (22) and is part of the valve operating member (13) when the second case (22) is closed with respect to the first case (21). The valve operating member locking device according to claim 1, wherein the valve operating member locking device is configured by a notch (41) into which the valve enters . The case member (20) further includes an outer cover (23) that is openably and closably connected to the second case (22) and covers the surface of the second case (22). The locking device for a valve operating member according to claim 7 . The attachment means (30)
A contact member (31) formed with a contact surface (31a) that contacts the casing outer peripheral surface (12a) of the valve (12) and is movable forward and backward with respect to the casing outer peripheral surface (12a);
A wedge member (32) that moves the contact member (31) toward the casing outer peripheral surface (12a) by approaching the contact member (31) relatively;
An urging member that brings the wedge member (32) relatively close to the abutting member (31) and urges the abutting member (31) with a force that presses against the casing outer peripheral surface (12a). (33) and, comprise it are a valve operating member for the locking device according to claim 1, wherein the. The locking device for a valve operating member according to claim 1, wherein the unlocking number of the dial lock (50) can be freely changed . The locking device for a valve operating member according to claim 1, wherein the locking device can be retrofitted to the valve (12) of the existing pipe (11) .

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