JP3162724U - Joint groove grating locking device - Google Patents

Abstract

Provided is a locking device that can be safely and reliably escaped even when a grating lid is accidentally closed and confined in a common groove during work in the common groove. A locking device that is attached to a locking attachment hole 9 of a grating lid 8 that is attached to an opening 14 of a common groove so as to be openable and closable is provided on an upper surface of an attachment base 17 having a cylinder hole so as to match the cylinder hole. The upper body 12 to which the substrate 13 having a portion is attached is inserted from above the locking attachment hole of the grating lid, and the cylinder lock 80 and the cap lid 85 can be respectively attached to and detached from the upper portion of the flange plate 22 having a through hole in the center. The lower cylinder 21 is formed by attaching the fixed cylinder 37 containing the latching means C including the operating shaft 41, the spring 67, and the rotating cam shaft 50 to the lower portion of the flange plate. The cylinder body of the lower body is inserted into the cylinder hole of the mounting base of the upper body, and the mounting base and the flange plate are fixed with fixing screws. [Selection] Figure 5

Description

The present invention relates to a locking device for a grating lid that is mainly attached to a common groove in which a communication cable, an electric cable, etc. are embedded.

Conventionally, a common groove for newly constructing, connecting, branching or inspecting lifelines such as communication cables and electric cables buried underground, and repairing malfunctions is an opening for inspection work for workers to enter and exit Is provided. Openable and closable grating-like grating lids and sealed manhole lids are attached to the openings. Locking devices are provided on the lids to prevent mischief, theft or vandalism and maintain safety. Installed.

Many of the locking devices are combined with a plurality of different types of locking means for safety. Usually, the lower stage is a latching means that engages with a latching hook attached to a receiving frame provided at the opening of the common groove, and the middle stage. A cylinder lock which can be taken out to prevent illegal operation of the latching means, and a locking device comprising a different kind of locking means provided with a cap lid for preventing the cylinder lock from being taken out are attached to the upper stage. These different types of locking means perform opening / closing operations using dedicated opening / closing jigs.

As the latching means, there is known a structure in which the arm shaft is vertically moved and locked / unlocked by a screwing means in which one end of the arm shaft is screwed to the drive shaft. In addition, the cap lid attached to the uppermost stage of the locking device is specially made of a metal drop lid with a short cylindrical part that is attracted to a permanent magnet and taken out to the outside, and the same metal lid with a screw groove on the inner surface. A locking device that is opened and closed with a simple screwdriver is known.

JP 2001-140520 A

The manhole cover to which the locking device is attached may be loosened due to the vibration or impact of the vehicle passing over the cover, the arm shaft gradually turns and unlocks, or the cover plate is distorted due to aging. When it is distorted by adiabatic expansion, a gap is formed between the cover plate and the receiving frame, and noise is likely to occur when the vehicle passes over the cover plate.

In addition, when a conventional manhole cover is accidentally closed and confined while working in a common groove, it is difficult to escape because the locking means of the locking device cannot be opened from the inside. There was a problem that there was.

The present invention is a locking device formed by combining different types of locking means in multiple stages, including preventing theft, and preventing the locking device from coming off due to vibration or impact transmitted from a vehicle traveling on the road. Of course, it is possible to prevent the rattling noise of the grating lid caused by vibration from the traveling vehicle, and to easily escape from the inside of the common groove when confined during work in the common groove. The object is to provide a locking device.

In order to solve the above-mentioned problems, the present invention provides a locking device 11 attached to the locking attachment hole 9 of the grating lid 8 which is attached to the opening 2 of the common groove 1 so as to be openable and closable. An upper body 12 formed by attaching a substrate 13 having an opening 14 matching the cylinder hole 18 on the upper surface, and a cylinder lock 80 and a cap lid 85 on the flange plate 22 having a through hole 23, respectively. A cylinder cylinder 26 that is detachably accommodated is attached, and a fixed cylinder 37 that accommodates a latching means C composed of an operating shaft 41, a spring 48, and a rotating cam shaft 50 is attached to the lower portion of the flange plate 22. The upper body mounting base 17 is inserted from above the lock mounting hole 9, and the lower body cylinder cylinder 26 is inserted into the mounting base cylinder hole 1. In order to unlock the mounting base and the flange plate 22 with the fixing screw 25, the magnet 74 of the opening / closing handle 71 is attracted to the cap lid 85 and removed. Next, the cylinder lock 80 is unlocked with the cylinder key 76 and taken out, and the fitting convex portion 73 of the opening / closing handle 71 is fitted into the fitting concave portion 42 of the operating shaft 41 as the latching means C and pushed in the vertical direction. After the operating shaft 41 is detached from the fitting groove 35, the opening / closing handle 71 is further rotated to move the crimping mechanism D attached to the rotating cam shaft 50 from the lock position of the lock plate 6 of the receiving frame 4 to the unlock position. It is characterized by becoming. Further, the cylinder portion 26 of the cap lid 85 is inserted into the cylinder tube 26 of the lower body 21 through the stepped portion above the large diameter portion 27 inserted into the cylinder hole 18 of the mounting base 17 of the upper body 12. A fitting portion 29 that fits into the through hole 23 of the flange plate 22 is integrally formed below the small diameter portion 28 and the large diameter portion 27, and a cylinder chamber 30 that accommodates the cylinder lock 80 is provided therein. A hook receiving step portion 31 for hooking the collar portion 82 of the cylinder lock 80 is connected to the upper portion of the cylinder chamber, and a claw receiving step portion 32 for hooking the locking claw portion 83 of the cylinder lock 80 to the lower portion of the cylinder chamber 30. And a locking portion 33 having a large diameter below the claw receiving step portion is provided, and a fitting groove portion 35 is formed in the center where a pair of stopper pieces 34 are attached to the locking portion 33 in parallel. The operating shaft 41 is detachably fitted in the fitting groove and locked. To. Furthermore, the latching means C accommodated in the fixed cylinder 37 of the lower body 21 includes an operating shaft 41 detachably fitted in a fitting groove 35 provided in the cylinder cylinder 26 and a fitting shaft of the operating shaft. A rotating cam shaft 50 fitted at one end to the portion 45 and a spring 48 interposed between the rotating cam shaft and the operating shaft 41 are accommodated, the lower end is closed by a bottom plate 57, and a handle portion 47 is provided at one end. The other end of the handle shaft 46 is inserted into the fixed cylinder 37 from the bearing hole 58 of the bottom plate 57, passes through the fitting hole 52 of the rotating cam shaft 50 and the spring 48, and is attached to the lower portion of the operating shaft 41. When the operating shaft 41 is in the locked position, the handle shaft 46 is pulled downward from the inner side of the joint groove 1 to be detached from the fitting groove portion 35 so as to be rotatable to the unlocked position. It is characterized by that. Furthermore, the operating shaft 41 is provided with a fitting recess 42 in the center of the upper surface, and forms a lock step 43 that fits with the fitting groove 35 of the cylinder cylinder 26 in parallel with both sides of the fitting recess. The fitting shaft portion 45 provided in the shaft portion 44 of the operating shaft 41 is fitted into the fitting hole 52 provided in the shaft portion 51 of the rotating cam shaft 50, and the lower surface of the operating shaft and the upper surface of the shaft portion 51 are fitted. The operating shaft 41 is pivotally supported so as to move up and down with a spring 48 interposed therebetween. Further, the rotating cam shaft 50 constituting the hooking means C has an arm portion 54 provided in the horizontal direction at one end of the shaft portion 51 located at the lower stage in the fixed cylinder 37 protruding from the guide groove portion 38. Since the rotary cam shaft 50 is integrally formed by providing a lock portion 55 at the tip of the portion, the fitting hole 52 of the shaft portion 51 is fitted to the fitting shaft portion 45 of the operating shaft 41. When the operation shaft 41 is rotated, the guide groove portion 38 is rotated in the horizontal direction, and when the rotary cam shaft 50 is in the locked position, the crimping screw 63 of the crimping mechanism D attached to the lock portion 55 is attached to the receiving frame 4. It is characterized by being in pressure contact with the lower surface of the lock plate 6. Further, the crimping mechanism D attached to the rotary cam shaft 50 is inserted into a spring hole 56 provided in the center vertical direction of the lock portion 55 with a spring cylinder 60 having a locking collar portion 61, and the upper end is hemispherical. A spring 67 is inserted into the threaded portion 65 of the crimping screw 63 having the formed head portion 64 and is inserted into the spring cylinder 60, and a nut 69 is screwed into the threaded portion 65 protruding to the lower surface side of the lock portion 55. The crimping screw 63 is attached so as to be elastic in the vertical direction. Furthermore, the substrate 13 of the upper body 12 has a non-slip groove 13a formed in a lattice shape on the entire surface, and a name portion 15 formed in a concave groove on the opposite side of the opening 14 provided on one side. Is provided.

As described above, when the locking device 11 is attached to the grating lid 8, the present invention can be easily and efficiently mounted by forming the locking device 11 into the upper body 12 and the lower body 21. The operating shaft 41 is detachably fitted in a fitting groove 35 formed at the lower end of the cylinder cylinder 26 attached to the lower body 21, and is urged upward by a spring 48 to be locked. There is no risk of unlocking, and it is safe because it can be securely locked. In addition, it is possible to prevent rattling of the grating lid 8 by attaching the crimping mechanism D to the rotary cam shaft 50 attached to the operating shaft 41 and crimping the grating lid 8 and the receiving frame 4. Furthermore, the purpose of use of the grating lid 8 can be clarified by entering a code or name in the name portion 15 provided on the lid plate 13 of the upper body 12. Further, when the grating lid 8 is accidentally closed and confined during the operation in the joint groove 1, the operating shaft 41 is fitted to the flange cylinder 26 by pulling the handle shaft 46 of the latch operating portion C from the inside. Since it can be detached from the groove 35 and rotated to the unlock position, it has the advantage of being able to escape safely. Furthermore, the cap lid 85 is safe because it does not pop out from the outside due to vibrations or shocks due to the long cylindrical portion 86.

It is a perspective view of the state which attached the locking device to the grating lid. It is a top view of the opening part provided in the grating lid which attaches a locking device. It is explanatory drawing which shows the state which attaches a locking device to a grating lid. It is explanatory drawing which shows the state which fits the upper body of a locking device to a grating lid | cover, and attaches a lower body to an upper body from the lower side. It is sectional drawing which shows the locked state of the locking device attached to the grating lid | cover. It is a disassembled perspective view of a locking device. It is an exploded sectional view of a lower body. It is a bottom view of the cylinder cylinder attached to the flange plate. It is a front view of an opening / closing handle. It is sectional drawing of the state which inserted the opening-and-closing handle in the cylinder cylinder of the locked state, and pushed down the operating shaft. It is sectional drawing which shows the state of an operating shaft in an unlock position. It is a bottom view of the rotating cam shaft in which the operating shaft shows an unlocked state. It is sectional drawing which shows the state which pulled down the handle | steering-wheel attached to the operating shaft and unlocked it.

The embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a state where a locking device is attached to a grating lid, FIG. 2 is a plan view of an opening provided in the grating lid to which the locking device is attached, and FIG. FIG. 4 is an explanatory view showing a state where the locking device is attached to the lid, FIG. 4 is an explanatory view showing a state where the upper body of the locking device is fitted to the grating lid, and the lower body is attached to the upper body from the lower side, and FIG. FIG. 6 is an exploded perspective view of the locking device, FIG. 7 is an exploded sectional view of the lower body, FIG. 8 is a bottom view of the cylinder cylinder attached to the flange plate, and FIG. It is a front view of a handle. A grating lid 8 detachably fitted to the upper portion of the receiving frame 4 attached to the opening 2 provided in the joint groove 1 is formed by attaching a locking device 11 to a lock attachment hole 9 provided at an arbitrary position of the grating lid. It is.

The locking device 11 includes an upper body 12 and a lower body 21 formed of a metal material having corrosion resistance, for example, stainless steel, and the upper body 12 has a cylinder hole 18 in the center as shown in FIGS. A substrate 13 having an opening 14 that coincides with the cylinder hole 18 is fixed to the upper surface of a rectangular mounting base 17 provided with. As shown in FIGS. 3 and 6, the lower body 21 is provided with a cylinder cylinder 26 that detachably accommodates a cylinder lock 80 and a cap lid 85 on an upper portion of a flange plate 22 having a through hole 23 in the center. A fixed cylinder 37 that accommodates the latching means C including the operating shaft 41, the spring 48, and the rotating cam shaft 50 is attached to the lower portion of the plate 22 on the same axis as the cylinder cylinder 26.

As shown in FIG. 4, the upper body 12 is fitted from above the lock mounting hole 9 of the grating lid 8, and the cylinder cylinder 26 of the lower body 21 is inserted into the cylinder hole 18 provided in the mounting base 17 from below. A plurality of fixing screws 25 are respectively inserted through the screw holes 24 of the flange plate 22 and screwed into the screw holes 19 of the mounting base 17 to fix the grating lid 8.

As shown in FIG. 6, the substrate 13 constituting the upper body 12 is formed with an anti-skid groove 13a formed in a lattice shape on the entire surface, and formed in a concave groove shape on the opposite side of the opening 14 provided on one side. The name part 15 is provided, and the number and name of the common groove 1 are entered in the name part to make it easy to understand from the outside.

As shown in FIG. 6, the mounting base 17 constituting the upper body 12 is formed in a square shape in accordance with the lock mounting hole 9 of the grating lid 8, and the locking device 11 fitted into the lock mounting hole 9 is provided. A plurality of screw holes 19 are provided at the periphery on the lower surface side of the cylinder hole 18 provided in the center, and the fixing screw is fixed to the screw hole from the screw hole 24 of the flange plate 22 of the lower body 21. 25 is screwed and attached to the grating lid 8.

As shown in FIGS. 6 and 7, the cylinder cylinder 26 constituting the lower body 21 is capped via a step portion above the large-diameter portion 27 inserted into the cylinder hole 18 of the mounting base 17 of the upper body 12. A small-diameter portion 28 through which the cylindrical portion 86 of the lid 85 is inserted, and a fitting portion 29 that is inserted into the through-hole 23 of the flange plate 22 are integrally formed below the large-diameter portion 27, and a cylinder lock 80 is formed in the upper part inside. A cylinder chamber 30 to be accommodated is provided, and a hook receiving step 31 for hooking the hook 82 of the cylinder lock 80 is connected to the upper portion of the cylinder chamber. A large-diameter claw receiving step portion 32 is formed, and a locking portion 33 is formed with a large diameter below the claw receiving step portion, and a pair of the locking portion is perpendicular to the axial direction of the locking portion. A stopper piece 34 is mounted in parallel, and a fitting groove 35 is formed between the stopper piece and the stopper piece. And, to lock detachably fitted a locking stepped portion 43 of the actuating shaft 41 in the fitting groove.

As shown in FIGS. 6 and 7, the fixed cylinder 37 is formed with a guide groove 38 cut out to a length of a quarter circumference on a cylindrical bottom surface, and a rotating camshaft 50 is formed at both ends of the guide groove. The arm portion 54 is widely cut out by an amount corresponding to half the width of the arm portion 54 so that the arm portion 54 can be rotated 90 degrees in the horizontal direction.

One end of the guide groove 38 is a lock position where the lock step portion 43 of the operating shaft 41 is fitted to the fitting groove portion 35 of the cylinder cylinder 26, and the upper end surface of the operating shaft 41 forms the fitting groove portion 35 at the other end. The locking step portion 43 and the fitting groove portion 35 are orthogonal to each other at the unlocking position.

As shown in FIGS. 6 and 7, the latching means C accommodated in the fixed cylinder 37 includes an operating shaft 41 made of a corrosion-resistant metal material such as stainless steel, a spring 48, and a rotating cam shaft 50. The operating shaft 41 is provided with a fitting recess 42 in the center of the upper surface, and forms a lock step 43 that fits with the fitting groove 35 of the cylinder cylinder 26 in parallel with both sides of the fitting recess. A fitting shaft portion 45 having a square cross section is provided below the shaft portion 44 of the shaft 41, and a handle shaft 46 is attached in the direction of the lower axis of the fitting shaft portion. A spring 48 is interposed between the upper surface of the shaft portion 51 of the shaft 50 and the operating shaft 41 is urged so as to move up and down and rotate.

The handle shaft 46 attached to the operating shaft 41 is first inserted through the bottom plate 57, the rotating cam shaft 50 and the spring 48, and the tip is connected to the lower end of the fitting shaft portion 45, and then the operating shaft is inserted into the fixed cylinder 37. 41, a spring 48 and a rotating cam shaft 50 are inserted, and the upper end of the fixed cylinder 37 is fixed to the lower portion of the through hole 23 of the flange plate 22. Accordingly, by pulling the handle shaft 46 protruding from the bottom plate 57 of the fixed cylinder 37 downward, the operating shaft 41 in the locked state can be detached from the fitting groove portion 35 and unlocked.

As shown in FIGS. 6 and 7, the rotary cam shaft 50 is provided with a fitting hole 52 that fits into the fitting shaft portion 45 of the operating shaft 41 in the central vertical direction of the shaft portion 51 provided at one end. An arm portion 54 is provided in the horizontal direction of the portion, and a large-diameter lock portion 55 is integrally formed at the other end of the arm portion, and a crimping mechanism D is attached in the central vertical direction of the lock portion 55.

The rotating cam shaft 50 rotates the guide groove portion 38 in the circumferential direction together with the operating shaft 41 by fitting the fitting shaft portion 45 of the operating shaft 41 with the fitting hole 52 of the shaft portion 51. With respect to the vertical movement of the shaft 41, only the fitting shaft portion 45 slides in the fitting hole 52, and the rotary cam shaft 50 does not move up and down. When the rotary camshaft 50 is in the locked position, the head 64 of the crimping screw 63 of the crimping mechanism D attached to the lock portion 55 located on the lower surface of the lock plate 6 of the receiving frame 4 is always in pressure contact with the lower surface of the lock plate 6. is doing.

As shown in FIGS. 6 and 7, the crimping mechanism D includes a spring cylinder 60 having a screw hole 56 a formed at the center of a spring hole 56 provided in the center vertical direction of the lock portion 55 and having a locking collar portion 61 at the lower end. A spring 67 is inserted into a screw portion 65 of a crimping screw 63 having a head portion 64 which is accommodated in the spring hole 56 and has a hemispherical upper end, and is inserted into the spring cylinder 60 and the lock portion 55. A nut 69 is screwed into a threaded portion 65 projecting to the lower surface side of the screw to urge the crimping screw 63 in the vertical direction. By always bringing the lower surface of the locked lock plate 6 into contact with the head 64 with the biasing force of the crimping screw 63, it is possible to prevent rattling with the receiving frame 4 due to the floating of the grating lid 8. The urging force of the crimping screw 63 is attached so that the crimping screw 63 can be moved up and down by rotating a nut 69 screwed into the threaded portion 65.

As shown in FIG. 9, the opening / closing handle 71 is provided with a fitting convex portion 73 formed in a polygonal cross section, preferably in a rectangular shape, at the lower end of an operation shaft 72 formed in a substantially T shape, and a handle portion 75 of the opening / closing handle 71. The cylinder key 76 is detachably suspended on one side of the cylinder lock 80, the cylinder key 76 for opening and closing the cylinder lock 80 is prevented from being lost during work, and a permanent magnet that attracts the cap lid 85 to the center of the upper end of the opening / closing handle 71 The magnet part 74 which consists of is attached.

As shown in FIG. 6, the cylinder lock 80 is provided with a collar portion 82 at the upper end and a locking claw portion 83 at the lower end, and the collar portion 82 is provided at the collar receiving step portion 31 provided at the upper end of the cylinder chamber 30. The locking claw portion 83 is rotated by inserting the cylinder key 76 from the key hole 81 provided on the upper surface, and the locking claw portion 83 is engaged with the claw receiving step portion 32 provided on the lower surface of the cylinder chamber 30. The cylinder lock 80 can be removed from the cylinder chamber 30 by being removed. In other words, when the cylinder lock 80 is accommodated in the cylinder chamber 30, the opening / closing handle 71 for operating the operating shaft 41 cannot be inserted, and therefore the illegal rotation of the operating shaft 41 can be prevented. is there.

The cap lid 85 is made of a rubber material, a synthetic resin material, or a metal material having magnetic adhesion, and the long cylindrical portion 86 is replaced with the mounting base 17 of the upper cylinder 12 and the small diameter portion 28 of the cylinder cylinder 26 of the lower body 21. The flat portion 87 having a flat upper end is fitted into the opening 14 of the substrate 13, and the upper surface of the flat portion 87 is formed on the same plane as the substrate 14. By making the cylindrical portion 86 of the cap lid 85 deeper than the conventional cap lid, the cylindrical portion 86 does not pop out due to vibration or impact of a vehicle traveling on the grating lid 8, and the cylindrical portion 86 is vertical even if it is forced to open. Since there is no gap in order to maintain the direction, it is difficult to open illegally.

Hereinafter, the operation of the embodiment of the present invention will be described. As shown in FIGS. 1 and 5, the joint groove 1 is fixed to a mounting plate 5 having an L-shaped lock plate 6 attached to a receiving frame 4 of the opening 2. Thus, when attaching to the grating lid 8 with the locking device 11 attached to the opening 2, the mounting base 17 of the upper body 12 is fitted from above the lock mounting hole 9, and the cylinder cylinder 26 of the lower body 21 is fitted. The grating lid 8 is inserted into the cylinder hole 18 from the lower side of the mounting base 17, and then the fixing screw 25 is inserted from the screw hole 24 of the flange plate 22 and screwed into the screw hole 19 of the mounting base 17. Clamp it in the vertical direction and fix it.

By forming the mounting base 17 in a square shape, it matches the shape of the lock mounting hole 9, and the locking device 11 can be prevented from rotating in the circumferential direction due to vibration or impact. Further, by providing the name portion 15 on the upper surface of the substrate 13, the number and name of the common groove 1 can be entered in the name portion so as to be easily understood from the outside.

As shown in FIG. 5, the lock of the locking device 11 attached to the grating lid 8 is arranged on the lower side of the lock plate 6 attached to the wall surface of the receiving frame 4 provided in the joint groove 1. The head portion 64 of the crimping screw 63 constituting the crimping mechanism D attached to the lock portion is urged by a spring 67 and is always in pressure contact. Therefore, even if the grating lid is lifted upward, the lock portion 52 of the rotary camshaft 50 cannot be lifted upward by being locked to the lock plate 6. Furthermore, since the grating lid 8 is always in pressure contact with the crimping mechanism D, noise due to rattling between the grating lid 8 and the receiving frame 4 can be prevented.

In the unlocking operation of the locking device 11, the magnet portion 74 attached to the opening / closing handle 71 is attracted to the upper surface of the cap lid 85 fitted to the cylinder cylinder 26 and pulled out in the vertical direction, and then inside the cylinder chamber 30. In the cylinder lock 80, the cylinder key 76 is inserted into the key hole 81, the locking claw portion 83 is removed from the claw receiving step portion 32 of the cylinder cylinder 26, and the cylinder lock 80 is taken out from the cylinder chamber 30.

The cylinder lock 80 is separate from the locking device 11 and can be exchanged with another new cylinder lock periodically or when necessary. By exchanging this cylinder lock with a more accurate one, it is possible to maintain a higher level of safety.

When the cylinder lock 80 is taken out from the cylinder chamber 30 of the cylinder cylinder 26, a fitting recess 42 provided on the upper surface of the operating shaft 41 constituting the latching operation section C accommodated in the fixed cylinder 37 is provided in the cylinder cylinder 26. Exposed.

Next, as shown in FIG. 10, the fitting convex portion 73 of the opening / closing handle 71 is fitted into the fitting concave portion 42 of the operating shaft 41, and the opening / closing handle 71 is pushed down in the arrow direction against the spring force of the spring 48. After the lock step 43 of the operating shaft 41 is detached from the fitting groove 35 of the cylinder cylinder 26, the open / close handle 71 is rotated 90 degrees horizontally to be unlocked (FIG. 12).

When the operating shaft 41 is rotated by the opening / closing handle 71 to rotate the rotating cam shaft 50 from the lower surface of the lock plate 6 to the unlock position, the pressing force of the operating shaft 41 is released when the opening / closing handle 71 is pulled out. The spring 48 is pushed upward by the elastic force of the spring 48, and the upper surface of the operating shaft 41 can be brought into contact with the lower surface of the stop piece 34 in the direction perpendicular to the unlocking state (FIG. 11).

When the grating lid 8 is locked again, when the fitting convex portion 73 of the opening / closing handle 71 is fitted into the fitting concave portion 42 of the unlocked operating shaft 41 and the operating shaft 41 is pushed down and rotated in the locking direction, The locking portion 55 of the rotating cam shaft 50 stops at the locking position of the guide groove, and the crimping screw 63 contracts along the spherical surface on the lower surface of the locking plate 6 when the head 64 comes into contact with the end of the locking plate 6. It moves and moves to the lock position together with the lock portion 55.

Next, when the opening / closing handle 71 is pulled out, the lock step portion 43 of the operating portion 41 is fitted into the fitting groove portion 35 and locked by the elastic force of the spring 48. Further, after the cylinder lock 80 is accommodated in the cylinder chamber 30 of the cylinder cylinder 26 and the cylinder key 76 is operated to lock the locking claw 83 on the claw receiving step 32, the cylinder key 76 is removed, Further, the cap lid 85 is dropped to the outside of the small-diameter portion 28 of the cylinder cylinder 26, and is fitted and fitted, so that the locking operation is completed by triple locking with the different types of locking means.

The handle shaft 46 attached to the lower end of the operating shaft 41 is for emergency escape when the grating lid 8 is accidentally closed and confined in the common groove 1 during inspection work. As shown in FIG. 1, when the handle shaft 46 attached to the operating shaft 41 of the latching means D is grasped and pulled downward, the lock step 43 of the operating shaft 41 is disengaged from the fitting groove 35 and the handle shaft 46 is rotated as it is. Thus, the rotary camshaft 50 can be moved to the unlock position and unlocked. Therefore, even when confined in the common groove 1, it is possible to escape safely.

The locking means C has to remove the cap lid 85 and the cylinder lock 80 from above, but only operates the locking means C from the bottom even if the cap lid 85 and cylinder lock 80 are attached. Can be unlocked.

1 Joint groove 8 Grating lid 9 Lock mounting hole 11 Locking device 12 Upper body 13 Substrate 14 Opening portion 15 Named portion 17 Mounting base 18 Cylinder hole 21 Lower body 22 Flange plate 23 Through hole 26 Cylinder cylinder 27 Large diameter portion 28 Small diameter portion 29 Fitting portion 30 Cylinder chamber 32 Claw receiving step portion 33 Locking portion 34 Stopper piece 35 Fitting groove portion 37 Fixed cylinder 38 Guide groove portion 41 Operating shaft 42 Fitting recess portion 43 Lock step portion 44 Shaft portion 45 Fitting shaft portion 46 Handle Shaft 48 Spring 50 Rotating cam shaft 51 Shaft portion 54 Arm portion 55 Locking portion 57 Bottom plate 60 Spring cylinder 63 Crimp screw 67 Spring 69 Nut 71 Opening / closing handle 72 Operation shaft 73 Fitting convex portion 74 Magnet portion 76 Cylinder key 80 Cylinder lock 85 Cap Lid C Latching action part D Crimping mechanism

Claims (7)

The locking device (11) attached to the locking attachment hole (9) of the grating lid (8) attached to the opening (2) of the common groove (1) so as to be openable and closable has an attachment base having a cylinder hole (18) in the center. An upper body (12) formed by attaching a substrate (13) having an opening (14) matching the cylinder hole (18) on the upper surface of the base (17);
A cylinder cylinder (26) that detachably accommodates a cylinder lock (80) and a cap lid (85) is attached to an upper part of a flange plate (22) having a through hole (23), and a lower part of the flange plate (22). A fixed cylinder (37) for receiving a latching means C comprising an operating shaft (41), a spring (48) and a rotating cam shaft (50) is mounted on the same axis as the cylinder cylinder (26). It consists of the lower body (21),
The mounting base (17) of the upper body is inserted from above the lock mounting hole (9), and the cylinder cylinder (26) of the lower body is inserted into the cylinder hole (18) of the mounting base from below. In this case, the mounting base and the flange plate (22) are formed by fixing them with fixing screws (25), and when unlocking, the magnet portion (74) of the opening / closing handle (71) is attached to the cap lid (85). Then, the cylinder lock (80) is unlocked by the cylinder key (76) and the S is taken out, and the fitting convex part (73) of the opening / closing handle (71) is moved to the operating shaft (41) as the latching means C. ) Is fitted into the fitting recess (42) and pushed in the vertical direction to disengage the operating shaft (41) from the fitting groove (35), and then the open / close handle (71) is further rotated to rotate the rotating camshaft ( 50) The crimping mechanism D attached to 50) is locked to the lock plate (6) of the receiving frame (4). Grating lid locking device co grooves, characterized by comprising moving the unlock position from. The cylinder (26) of the lower body (21) is disposed above the large diameter portion (27) inserted through the cylinder hole (18) of the mounting base (17) of the upper body (12) via a stepped portion. A small-diameter portion (28) through which the cylindrical portion (86) of the cap lid (85) is inserted, and a fitting portion that fits into the through-hole (23) of the flange plate (22) below the large-diameter portion (27). (29) is integrally formed, a cylinder chamber (30) for accommodating the cylinder lock (80) is provided therein, and a hook receiving portion for hooking the collar portion (82) of the cylinder lock (80) on the upper portion of the cylinder chamber. A stepped portion (31) is provided continuously, and a claw receiving stepped portion (32) for engaging a locking claw portion (83) of the cylinder lock (80) is provided at the lower portion of the cylinder chamber (30). A locking portion (33) having a large diameter below is provided, and a pair of stopper pieces (34) are attached in parallel to the locking portion (33). Engagement groove (35) is formed, joint grooves of grating lid locking device according to claim 1, characterized in that to lock removably fitted the operating shaft in the fitting groove (41) on. The latching means C accommodated in the fixed cylinder (37) of the lower body (21) includes an operating shaft (41) that is detachably fitted in a fitting groove (35) provided in the cylinder cylinder (26). A rotating cam shaft (50) having one end fitted to the fitting shaft portion (45) of the operating shaft and a spring (48) interposed between the rotating cam shaft and the operating shaft (41) are accommodated. The lower end is closed by the bottom plate (57), and the other end of the handle shaft (46) having the handle portion (47) at one end is inserted into the fixed cylinder (37) from the bearing hole (58) of the bottom plate (57). The rotary camshaft (50) is attached to the lower portion of the operating shaft (41) through the fitting hole (52) and the spring (48), and when the operating shaft is in the locked position, the common groove (1) By pulling the handle shaft (46) downward from the inside, it is detached from the fitting groove (35) to the unlock position. Rotatably formed to become that joint grooves of grating lid locking device according to claim 1 or 2 wherein. The operating shaft (41) is provided with a fitting recess (42) at the center of the upper surface, and a lock step portion (fitting with the fitting groove (35) of the cylinder tube (26) in parallel with both sides of the fitting recess ( 43), and a fitting hole (52) provided in the shaft portion (51) of the rotating cam shaft (50) in the fitting shaft portion (45) provided in the shaft portion (44) of the operating shaft (41). ) And a spring (48) is interposed between the lower surface of the operating shaft and the upper surface of the shaft portion (51), and the operating shaft (41) is pivotally supported so as to move up and down and rotate. The grating cover locking device for a joint groove according to claim 1 or 3. The rotating cam shaft (50) constituting the latching means C has an arm portion 54 provided in the horizontal direction at one end of the shaft portion (51) located at the lower stage in the fixed cylinder (37), and the guide groove portion (38). The rotating cam shaft (50) is formed integrally with the fitting shaft portion (45) of the operating shaft (41). 51) is fitted in the fitting hole (52), and thus the guide shaft (41) is rotated in the horizontal direction along with the rotation of the operating shaft (41), and the rotating cam shaft (50) is locked. 5. The joint according to claim 1, wherein the crimping screw 63 of the crimping mechanism D attached to the lock portion (55) is pressed against the lower surface of the lock plate (6) of the receiving frame (4). Groove lid locking device for grooves. The pressure-bonding mechanism D attached to the rotating cam shaft (50) is inserted through a spring cylinder (60) having a locking hook portion (61) into a spring hole (56) provided in the central vertical direction of the lock portion (55). Then, the spring (67) is inserted through the threaded portion (65) of the crimping screw (63) having a head (64) having a hemispherical upper end, and is inserted into the spring cylinder (60). The nut (69) is screwed into the threaded portion (65) projecting to the lower surface side of (55), and the crimping screw (63) is attached so as to be elastic in the vertical direction. Grating lid locking device for joint groove. The substrate (13) of the upper body 12 has a non-slip groove (13a) formed in a lattice shape on the entire surface, and a groove formed on the opposite side of the opening (14) provided on one side. 2. The joint groove locking cover locking device according to claim 1, further comprising a portion (15).

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