JP5094785B2 - Inspection lid locking device for handhole - Google Patents

Description

  The present invention relates to an underground buried joint groove for connecting, branching or inspecting a lifeline buried underground such as a power cable, a telephone cable, an optical communication cable, a signal cable, ie, a handball. The present invention relates to a locking device attached to an inspection lid.

  Conventionally, workers in hand holes provided to connect, branch, or inspect lifelines such as gas pipes, water pipes, power cables, telephone cables, and optical communication cables that have been buried underground Is provided with an opening for inspection work that goes in and out for periodic inspections and repairs of malfunctions, and an inspection lid that can be opened and closed is attached to the opening.

  The inspection lids are attached in a single or double manner, and each lid has a mischief or theft or destruction of a power cable, telephone cable, optical communication cable, signal cable, etc. embedded in a common groove. In order to prevent an act etc., the locking device is provided so that it may not open easily.

  For safety reasons, the locking device is formed by combining a plurality of different types of locking means. Usually, the locking means that engages with a locking hook provided on the side wall of the hand hole, and illegal operation of the locking means. In order to prevent this, a cylinder lock that is housed in the upper cylinder of the locking device main body and can be pulled out only in the upward direction, and a cap lid that prevents the cylinder lock from being taken out are housed in a lid chamber provided above the cylinder chamber so as to be removable. It is provided. These different types of locking means are opened and closed using an opening / closing jig having a dedicated opening / closing means.

  For example, the cylinder lock housed in the upper cylinder is locked by opening and closing the locking claw of the cylinder lock using a dedicated key attached to the opening and closing jig, and the cap lid is attached to the magnet attached to one end of the opening and closing jig. It can be adsorbed and pulled up to be taken out. The cap lid is structured so that it cannot be opened with a normal jig such as a screwdriver or pliers.

  Further, the latching means inserts the lower end of the opening / closing jig into the upper cylinder and engages the upper end of the rotating shaft, and then rotates the opening / closing jig to rotate the rotating shaft. There is known a locking device in which a latching arm attached to is rotated and moved to a lower surface of a latching hook provided on a wall surface of a handball to be locked.

Japanese Patent Laid-Open No. 11-107304

  When the locking device is used by attaching it to the inspection lid of the handhole, particularly the inner lid of the double type inspection lid, it is easy to forget to hang it because different types of locking operations are performed. In particular, since the locking means performs a locking or unlocking operation by rotating the lock arm, it is impossible to visually check whether the locking means has been securely locked or not. It was.

  The present invention is a locking device formed by combining different types of locking means in multiple stages.In addition to preventing theft, it is of course possible to prevent the inspection lid from loosening or falling off due to an impact such as an earthquake or traveling vehicle. A locking device for the inspection cover for handholes, which is intended to enhance the safety by reliably preventing forgetting to engage the latching operation part, which is difficult to distinguish between the locked state and the unlocked state after appearance. provide.

In order to solve the above-mentioned problems, the present invention provides a cap above the flange plate 2 provided with an octagonal locking hole 5 comprising a long side portion 6 and a short side portion 7 which are chamfered at the four corners in the center to form a pair. In the inspection lid locking device in which the upper cylinder 10 for accommodating the lid A and the cylinder lock B is provided and the lower cylinder 21 having the latching operation part C is provided below the flange plate 2, the upper cylinder 10 is a cylinder. Guide grooves 14 are provided in the axial direction on opposite surfaces of the inner wall surface of the chamber 11, and the lower cylinder 21 is provided with a pin guide groove 22 having a substantially quarter circumference open at the lower part thereof. a locking pin 35 in which the rotary shaft 24 having a pin groove 29 at the lower end of the shaft portion 28 provided below the head 25 having a fitting recess 26 to the upper center, is inserted into the pin groove 29, the A spring 31 wound around the shaft portion, and between the spring and the lock pin 35 A latching operation portion C comprising a spring retaining ring 32 to be present is mounted, and a bearing ring 38 that supports the shaft portion 28 of the rotating shaft is fixed to the lower end of the lower cylinder 21, and the rotating shaft is fixed by the spring 31. The latch actuating portion C is opened and closed by urging upward and opening and closing the latch operating portion C when the lock pin 35 is in the locked position. 41, the operating shaft 42 is inserted, the lower end is fitted to the head 25 of the rotating shaft, and the operating shaft 42 is pushed down to disengage the rotating shaft head 25 from the locking hole 5 of the flange plate. Then, when the opening / closing handle is rotated to position the lock pin 35 in the unlocked state, the lower end of the operating shaft is engaged with the head 25 of the rotating shaft, and the rotation is restricted. Guide protrusions 43 provided on both sides of the upper cylinder Closing handle 41 pulling is restricted by engaging the lower portion of the cylinder chamber 11 is characterized in that so as not withdrawn from the upper cylinder 10. Further, the flange plate 2, the short side portion 7a below the locking hole 5 in the locking direction, by positioning the right long side portion 6a in the unlocking direction, the upper cylinder attached to the upper portion of the flange plate 2 The guide groove portion 14 provided in the cylinder chamber 11 is positioned in a direction perpendicular to the long side portion 6 of the locking hole, and the pin guide groove 22 provided in the lower portion of the lower cylinder 21 is provided below the locking hole 5. The short side portion 7a and the right long side portion 6a are provided so as to be opened in a substantially quarter circumference. Further, the rotary shaft 24 of the latching operation part C is provided with a hexagonal fitting recess 26 in the center of the upper surface of the head 25, and the flange is formed on both sides of the upper edge in parallel with the diagonal in the vertical direction of the fitting recess 26. A locking step portion 27 that engages with the locking hole 5 of the plate 2 is provided, and the opening direction of the pin groove portion 29 provided at the lower end of the shaft portion 28 is formed in the same direction as the diagonal line of the fitting recess 26 in the vertical direction. It is characterized by that. Furthermore, the opening / closing handle 41 is provided with a hexagonal rotation protrusion 44 at the lower end of the operation shaft 42, and guide protrusions 43 inserted into the guide groove portion 14 of the upper cylinder 10 on both sides of the peripheral surface of the operation shaft. The rotating protrusion 44 is provided in a direction perpendicular to the diagonal line in the left-right direction.

  As described above, in the present invention, when the lock pin 35 of the latching operation part C is locked / unlocked by rotating the rotary shaft 24 by rotating the open / close handle 41, the open / close handle 41 is in the unlock position. The operation shaft 42 is controlled in the rotation direction while the rotation protrusion 44 at the tip remains engaged with the head 25 of the rotation shaft 24, and the guide protrusion 43 is the lower surface of the cylinder chamber 11 of the upper cylinder 10, that is, the engagement. The pulling is restricted by being latched by the stop portion 13a, and the opening / closing handle 41 cannot be pulled out from the upper cylinder 10, and the unlocked state, that is, forgetting to lock can be confirmed. Further, when the latching operation portion C is in the locked state, the guide projection 43 provided on the operation shaft 42 of the opening / closing handle 41 is aligned with the guide groove portion 14 of the cylinder chamber 11 and can be pulled upward, and is in the locked state. I can confirm that. Thereby, there is an advantage that it is possible to reliably prevent forgetting to hook the latching operation part C physically.

It is sectional drawing which shows the use condition which attached the locking device to the inner cover of the double inspection cover of a handhole. It is a principal part enlarged view of the locking device attached to the inner cover. It is a center sectional view of a locking device. It is a front view of an opening / closing handle. It is a bottom view of the operating shaft of an opening / closing handle. It is a disassembled perspective view of a locking device. It is a top view of a flange board. FIG. 8 is a cross-sectional view taken along line AA in FIG. 7. It is a top view of the locked state which removed the cap lid and the cylinder lock from the inside of the upper cylinder of a locking device. FIG. 5 is a partially cutaway cross-sectional view showing a state where an opening / closing handle is inserted into an upper cylinder of a locking device in a locked state. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG. FIG. 6 is a partially broken cross-sectional view of a state in which a turning protrusion of an opening / closing handle is fitted to a fitting recess of a rotating shaft in a locked state. FIG. 6 is a partially broken cross-sectional view of a state in which the opening / closing handle is pushed in and the rotating shaft in the locked state is pushed down from the locking hole of the flange plate and released. It is sectional drawing which turned the lock pin of the rotating shaft into the unlocked state by rotating the opening-and-closing handle. FIG. 5 is a partially cutaway cross-sectional view showing a state in which the opening / closing handle cannot be detached in the unlocked state. It is the DD sectional view taken on the line of FIG.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. FIG. 1 is a sectional view showing a use state in which a locking device is attached to the inner lid of a double inspection lid of a handhole, and FIG. 3 is a central sectional view of the locking device, FIG. 4 is a front view of the opening / closing handle, FIG. 5 is a bottom view of the operating shaft of the opening / closing handle, FIG. 6 is an exploded perspective view of the locking device, and FIG. FIG. 8 is a cross-sectional view taken along the line AA of FIG. 7, and FIG. 9 is a plan view showing a locked state in which the cap lid and the cylinder lock are removed from the upper cylinder of the locking device. The locking device 1 has a cap lid A and an upper cylinder 10 that accommodates a cylinder lock B mounted on an upper portion of a flange plate 2 formed of a non-magnetic and corrosion-resistant metal material, for example, stainless steel, and the flange plate A lower cylinder 21 that accommodates a latching operation portion C that is a locking means is attached to the lower portion of 2 and formed concentrically.

  As shown in FIGS. 6 to 8, the flange plate 2 has an upper surface recess 3 at the center of the upper surface and a lower surface recess 4 at the center of the lower surface concentrically, and a locking hole 5 is provided at the center of the upper and lower surface recesses. Each of the locking holes 5 has a long side portion 6 and a short side portion 7 on opposite sides, and is formed in a substantially octagonal shape by chamfering four corners. As shown in FIGS. 7 and 11, the long side portion 6 positioned in the longitudinal direction of the locking hole 5 is positioned so as to be in the vertical direction of the flange plate 2, and the short side portion 7 a below the locking hole 5 is locked. The right long side 6a is provided in the unlocking direction.

  As shown in FIGS. 3 and 6, the upper cylinder 10 is provided with a cylinder chamber 11 for accommodating the cylinder lock B therein, and a cap chamber 12 in which a cap lid A having a larger diameter than the cylinder chamber is fitted above the cylinder chamber. A large-diameter chamber 13 having a diameter larger than that of the cylinder chamber is provided below, and a locking portion 13 a is provided on the upper portion of the large-diameter chamber 13. On the inner wall surface of the cylinder chamber 11, a pair of guide groove portions 14 are provided in the axial direction at opposing positions, and an engagement portion provided on the upper outer surface of the cylinder lock B at an upper portion shifted from the guide groove portion in a direction perpendicular to the guide groove portions. A locking groove 15 for fitting the locking protrusion 18 is provided, and a locking portion 13a connected to the large-diameter chamber 13 is provided on the lower surface of the inner wall surface of the cylinder chamber. The upper cylinder 10 is mounted such that the guide groove 14 of the cylinder chamber 11 is positioned in a direction perpendicular to the long side portion 6 that is the longitudinal direction of the locking hole 5 of the flange plate 2, that is, in the left-right direction.

  The cap lid A that covers the cap chamber 12 is made of a magnetic material having a corrosion resistance and is formed into a cap shape. As shown in FIGS. By combining them, a commercially available driver or the like cannot take them out, and a strong magnet 47 attached to one end of the branch portion of the opening / closing handle 41 can be attracted to the upper surface of the cap lid A and pulled up to be taken out. The cap lid is preferably circular.

  As shown in FIGS. 3 and 6, the cylinder lock B is accommodated by engaging a locking collar 17 provided at the upper end of the cylinder lock with the lower end of the cap chamber 12, and on the upper part of the inner wall surface of the cylinder chamber 11. A locking projection 18 provided on the outer surface of the cylinder lock B is fitted into the provided locking groove 15 to prevent the cylinder lock B from rotating, and a locking claw portion 19 provided at the lower part of the cylinder lock is rotated. If the cylinder lock 11 is protruded in the centrifugal direction and hooked on the locking portion 13a on the lower surface of the cylinder chamber 11, the cylinder lock cannot be taken out upward.

  Thus, by inserting and rotating the cylinder key 46 attached to the opening / closing handle 41 in the key hole provided on the upper surface of the cylinder lock B, the locking claw portion 19 is rotated to be provided on the lower surface of the cylinder chamber 11. The cylinder lock B can be prevented from being inserted into and removed from the cylinder chamber 11 by being engaged with and disengaged from the locking portion 13a. That is, when the cylinder lock B is accommodated in the cylinder chamber 11, it is safe because the opening / closing handle 41 for operating the rotating shaft 24 cannot be inserted.

  As shown in FIG. 6, the latching operation portion C is mounted in a lower cylinder 21 formed of a strong and corrosion-resistant metal material, and a bearing ring 38 serving as a bottom plate is provided at the lower end of the lower cylinder. It is fixed.

  As shown in FIGS. 6 and 12, the lower cylinder 21 is provided with a pin guide groove portion 22 with a substantially quarter circumference cut out at the lower end, and both end portions of the pin guide groove portion are each half the width of the lock pin. The lock pin is widely cut out by the length so that the lock pin can rotate approximately 90 degrees. The opening direction of the pin guide groove is approximately a quarter circumference with the short side 7a below the locking hole 5 in the locking direction and the right long side 6a in the unlocking direction. And is mounted concentrically with the upper tube 10 at the center of the lower surface of the flange plate 2.

  The latching operation portion C is formed in the lower cylinder 21 so as to be movable up and down and rotatable, a spring 31 for urging the rotation shaft upward, and a slightly lower portion of the rotation shaft 24. A lower end of the lower cylinder 21 includes a lock pin 35 inserted into a pin groove portion 29 provided in a horizontal direction at a lower portion of the small-diameter shaft portion 28 and a spring retaining ring 32 interposed between the spring 31 and the lock pin 35. The shaft portion 28 of the rotating shaft 24 is inserted into the shaft hole 39 of the bearing ring 38 so as to smoothly move up and down and rotate.

  The rotary shaft 24 is provided with a hexagonal fitting recess 26 at the center of the upper surface of a columnar head portion 25 inserted into the lower cylinder 21. A pair of engaging stepped portions 27 formed by cutting out in parallel with the diagonal line in the vertical direction is provided, and the lower end of the slightly small-diameter shaft portion 28 formed through the stepped portion 24a at the lower portion of the head 25 has a diameter. A pin groove portion 29 is formed in the same direction as the diagonal line of the fitting recess 26 in the vertical direction.

  The upper end of the spring 31 wound around the shaft portion 28 of the rotary shaft 24 abuts on a step portion 24 a provided on the lower surface of the head portion 25 of the rotary shaft, and the lower end thereof is a spring retaining ring 32 inserted through the shaft portion 28. The lower surface of the spring retaining ring 32 is in contact with the upper surface of the lock pin 35. Since the lock pin 35 is always urged downward by the spring force of the spring 31 via the spring retaining ring 32, the lock pin 35 can be smoothly moved without rattling with respect to the vertical movement or rotation movement of the rotary shaft 24. It can follow and move up and down and rotate.

  As shown in FIGS. 6 and 12, the lock pin 35 is provided with a semicircular locking hook portion 36 having a hooking function at the rear end so as to contact the inner wall of the lower cylinder 21, and The portion prevents the lock pin 35 inserted through the pin groove portion 29 provided in the shaft portion 28 of the rotating shaft 24 located in the lower cylinder 21 from moving forward and dropping off from the rotating shaft 24.

  As shown in FIGS. 4 and 5, the opening / closing handle 41 is formed in a T shape, and is provided with a pair of guide protrusions 43 in a direction substantially perpendicular to the axial direction on the substantially peripheral surface of the lower end of the operation shaft 42. A hexagonal rotation protrusion 44 is provided at the lower end in the center direction. The guide protrusions 43 are provided in the same direction as the facing surfaces of the rotating protrusions 44.

  A powerful magnet 47 is provided on one side of the upper end of the opening / closing handle 41 so that the cap lid A is attracted and removed by a magnetic force, and a cylinder key 46 for opening / closing the cylinder lock B is mounted on the other side. In addition, the cylinder key is prevented from being lost during work.

  Hereinafter, the operation of the embodiment of the present invention will be described. The locked state of the inner lid 52 to which the locking device 1 is attached is below the latching hook 54 attached to the wall surface of the handhole 50 as shown in FIGS. The lock pin 35 of the latching operation part C is latched on the side, and when the inner lid 52 is lifted upward, the lock pin 35 is locked with the latch hook 54 and cannot be lifted upward, That is, it is in a locked state.

  In order to unlock the locking device 1, first, the magnet 47 provided on the opening / closing handle 41 is matched with the upper surface of the cap lid A mounted on the upper part of the upper cylinder 10, and the upper portion is attracted to the cap lid A by a strong magnetic force. Pull up from the inside of the cylinder 10 and take it out of the upper cylinder 10.

After removing the cap lid A, the cylinder key 46 is inserted into the cylinder lock B in the cylinder chamber 11, and the locking claw portion 19 is rotated to release the latch with the locking portion 13a of the cylinder chamber 11. external chamber 11 to take out the cylinder lock. This cylinder lock B is separate from the locking device 1 and can be exchanged with another one periodically or when necessary. By replacing the cylinder lock with a more accurate one, higher safety can be achieved. Can be maintained.
that's all

  As shown in FIGS. 9, 10, and 11, the latching operation portion C as the main locking means is a locking step portion provided on both sides of the upper portion of the head 25 of the rotary shaft 24 in the locking hole 5 of the flange plate 2. 27 is urged by a spring 31 from below, and the locking step portion 27 is fitted and locked to the long side portion 6 of the flange plate 2 to be locked.

  When unlocking the latching operation part C, as shown in FIGS. 10 and 11, it opens and closes with respect to the fitting recess 26 provided at the center of the upper surface of the rotating shaft 24 visible on the bottom surface of the cylinder chamber 11 from which the cylinder lock B is taken out. This is performed by fitting a rotation protrusion 44 provided on the operation shaft 42 of the handle 41.

  As shown in FIGS. 10 and 13, when the guide protrusions 43 provided on both lower sides of the operating shaft 42 of the opening / closing handle are inserted into the guide grooves 14 provided in the cylinder chamber 11 of the upper cylinder 10 as shown in FIGS. Therefore, when the operating shaft 42 is lowered, the turning projection 44 can be fitted into the fitting recess 26.

  Next, as shown in FIG. 14, the operating shaft 42 of the opening / closing handle is pushed down against the elastic force of the spring 31, and the head 25 of the rotating shaft 24 is pushed down from the inside of the locking hole 5 of the flange plate 2. The opening / closing handle 41 is rotated to the unlocked position in a state where it is pushed down until there is a gap between the lower surface of the flange plate 2 and the upper surface of the head portion 25 so as not to generate frictional resistance.

  As shown in FIG. 15, the rotary shaft 24 is rotated by the operating shaft 42 of the opening / closing handle to rotate the lock pin 35 from the lower surface of the latching hook 54 to the unlocked position (FIG. 17). When the pressing force is released, the rotary shaft 24 is pushed up by the elastic force of the spring 31 and the upper surface of the head 25 is brought into contact with the lower surface of the locking hole 5 of the flange plate 2 and locked (FIG. 16). That is, as shown in FIG. 17, when the rotating shaft 24 rotates, the short side portion 7 of the locking hole 5 and the locking step portion 27 of the head portion 25 of the rotating shaft are positioned in parallel. Is longer than the length of the short side portion 7, the upper edge of the head abuts on and engages with the lower surface of the locking hole 5 on the short side portion 7 side. In this case, the guide protrusion 43 moves approximately 90 degrees from the position of the guide groove portion 14 provided on the inner surface of the upper cylinder 10 and is hooked on the locking portion 13a so that the guide protrusion 43 cannot move upward in the cylinder chamber. It becomes locked.

  When the latching operation part C is in the unlocked state, the operation shaft 42 of the opening / closing handle 41 is latched by the locking part 13a provided at the lower part of the cylinder chamber 11 of the upper cylinder 10 with the guide projection 43. The upward movement is restricted, and the lower end of the rotating projection 44 is locked to the fitting recess 26 of the rotating shaft 24 and cannot be removed, and the rotation of the opening / closing handle is restricted.

  When the latching operation portion C of the locking device 1 is in the locked state, the opening / closing handle 41 can be pulled out. However, when the locking device 1 is in the unlocked state, as described above, since the opening / closing handle 41 cannot be removed, Since the locked state can be physically determined, forgetting to lock can be surely prevented. That is, since the opening / closing handle 41 cannot be pulled out from the locking device 1 unless the lock pin 35 is in a locked state, it has an advantage that it is possible to reliably prevent forgetting to lock.

  When the inner lid 52 to which the locking device 1 is attached is attached to the inspection hole of the hand hole 50, the opening / closing handle 41 is inserted into the upper cylinder 10 of the latching operation part C that has been locked in advance, and is once unlocked. After the opening / closing handle 41 is inserted into the locking device 1, the opening / closing handle 41 is attached to the inspection hole, and then the lock pin 35 is locked by performing the above-described procedure. Lock it.

  Further, the cylinder lock B is accommodated in the cylinder chamber 11 of the upper cylinder 10, and the cylinder key 46 is operated to lock the locking claw portion 19 on the locking portion 13 a of the cylinder chamber 11 and lock the cylinder key. Next, the locking operation is completed by dropping the cap lid A into the cap chamber 12 provided at the upper portion of the upper cylinder 10 and allowing it to idle.

DESCRIPTION OF SYMBOLS 1 Locking device 2 Flange plate 5 Locking hole 6 Long side part 7 Short side part 10 Upper cylinder 11 Cylinder chamber 14 Guide groove part 21 Lower cylinder 22 Guide groove part 24 Rotating shaft 25 Head part 26 Fitting recessed part 27 Locking step part 28 Axis Part 29 Pin groove part 31 Spring 32 Spring stop ring 35 Lock pin 38 Bearing ring 41 Opening / closing handle 42 Operation shaft 43 Guide protrusion 44 Turning protrusion 52 Inner cover A Cap cover B Cylinder lock C Latching operation part

Claims (4)

A cap lid (A) above the flange plate (2) provided with an octagonal locking hole (5) consisting of a long side portion (6) and a short side portion (7) chamfered at the four corners at the center. ) And a cylinder lock (B), and an upper cylinder (10) is provided, and a lower cylinder (21) having a latching operation part (C) is provided below the flange plate (2). In
The upper cylinder (10) is provided with guide groove portions (14) in the axial direction on the opposing surfaces of the inner wall surface of the cylinder chamber (11), and the lower cylinder (21) is substantially a quarter of a circle below. A pin guide groove (22) having an open periphery is provided,
A rotating shaft (24) having a pin groove portion (29) at the lower end of a shaft portion (28) provided below a head portion (25) having a fitting recess (26) in the center of the upper surface in the lower cylinder, and the pin groove (29) locking pin which is inserted in (35), a spring (31) of winding the shaft portion, a spring stop ring to be interposed between the spring and the lock pin (35) (32 And a bearing ring (38) bearing the shaft portion (28) of the rotating shaft is fixed to the lower end of the lower cylinder (21), and the rotating shaft is attached to the spring. 31 is urged upward and is rotatably supported.
When the locking pin (35) is in the locked position, the latching operation part (C) is opened and closed by the opening / closing handle (41) in the upper cylinder (10) from which the cap lid (A) and the cylinder lock (B) are removed. The operating shaft (42) is inserted, the lower end is fitted to the head (25) of the rotating shaft, the operating shaft (42) is pushed down, and the head (25) of the rotating shaft is inserted into the locking hole of the flange plate. When the lock pin (35) is placed in the unlocked state by rotating the open / close handle and then the lock pin (35) is unlocked, the lower end of the operating shaft is engaged with the head (25) of the rotating shaft. Rotation is restricted in the combined state, guide protrusions (43) provided on both sides of the operating shaft are hooked on the lower part of the cylinder chamber (11) of the upper cylinder, and the pulling is restricted, and the opening / closing handle (41) is at the upper part Handhole point characterized by not being pulled out from the tube (10) Lid 旋錠 apparatus. The flange plate (2) is in the locking direction of the short side portion (7a) below the locking hole (5), by positioning the right long side portion (6a) in the unlocking direction, the flange plate (2 The guide groove (14) provided in the cylinder chamber (11) of the upper cylinder (10) attached to the upper part of the upper cylinder (10) is positioned in a direction perpendicular to the long side part (6) of the locking hole, and the lower cylinder (21) The pin guide groove (22) provided in the lower portion of the locking hole (5) is opened to a substantially quarter circumference between the lower side (7a) below the locking hole (5) and the right side (6a). The inspection lid locking device for a handhole according to claim 1, wherein the inspection lid locking device is provided.   The rotating shaft (24) of the latching operating part (C) is provided with a hexagonal fitting recess (26) in the center of the upper surface of the head (25), and the upper and lower sides of the fitting recess (26) are arranged on both sides. A locking step portion (27) that engages with the locking hole (5) of the flange plate (2) is provided in parallel with the diagonal line of the direction, and the opening of the pin groove portion (29) provided at the lower end of the shaft portion (28) The inspection lid locking device for a handhole according to claim 1 or 2, wherein the direction is formed in the same direction as a diagonal line in the vertical direction of the fitting recess (26).   The opening / closing handle (41) is provided with a hexagonal rotation protrusion (44) at the lower end of the operation shaft (42), and is formed in the guide groove portion (14) of the upper cylinder (10) on both sides of the peripheral surface of the operation shaft. The inspection lid locking device for a handhole according to claim 1, wherein the guide protrusion (43) to be inserted is provided in a direction perpendicular to a diagonal line in the left-right direction of the rotating protrusion (44).

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