JPH0457538U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a front view of a locking device with a waterproof cap plate according to an embodiment of the present invention, FIG. 2 is a right side view of the locking device, and FIG. 3 is a bottom view of the locking device. , FIG. 4 is a sectional view of the stopper taken along the line A-A in FIG. 1. FIG. 5 is a vertical cross-sectional view of a manhole cover in a locked state using the locking device;
The figure is a longitudinal sectional view with the cap plate opened and the rotor operating key stick inserted. FIG. 7 is a perspective view of the key stick for opening and closing the cap plate used in the locking device, and FIG. 8 is a perspective view of the key stick for operating the rotor. FIG. 9 is a longitudinal sectional view corresponding to FIG. 5 of a locking device with a waterproof cap plate according to another embodiment of the present invention. 1... Manhole cover, 2... Case, 3...
Small diameter shaft hole, 4...Large diameter shaft hole, 5...Female thread part, 6
... Stop receiving groove, 7 ... Rotor, 8 ... Rotor head, 9 ... Relief groove, 10 ... Fixed disk, 11 ...
Upper end surface of fixed disk, 12...Lower end shoulder surface of head, 1
3...Central shaft hole, 14...Lower end of rotor, 15
... Fixed frame body, 16 ... Receiving part, 17 ... Stop plate, 18 ... Peripheral projection, 19 ... Locking disc, 20 ...
... Receiving hole, 21 ... Compression coil spring, 22 ... Stepped shoulder surface, 23 ... Key stick for rotor operation, 24 ... Cylindrical portion, 25 ... Driving recess, 26 ... Upper end surface of case, 27 ... Positioning protrusion, 28... Cap plate, 29... Transverse axis, 30... Center through hole, 31...
... Cylindrical stopper, 32 ... Male thread, 33 ... Retaining protrusion, 34 ... Recess, 35 ... Key bar for opening and closing the cap plate, 36 ... Convex part for driving, 37 ... Mounting hole, 3
8... Outer circumferential thread, 39... Nut, 40... Annular groove, 41... E-ring, 42... Bearing protrusion,
43, 44... Nut, 45... Protrusion for inserting and positioning the key rod, 46... Groove for inserting and positioning, 47...
...Spring for urging the cap plate to open, 48...Screw for fixing the stopper plate.

Claims (1)

[Scope of utility model registration request] A small-diameter shaft hole 3 and a large-diameter shaft hole 4 are provided vertically in communication with each other on the central axis of a case 2 that is fixed to a cover 1 of a manhole, etc., and a female screw portion 5 is provided at the lower end of the small-diameter shaft hole 3. A stop receiving groove 6 is provided in the inner wall surface of the radial shaft hole 4 in the axial direction to prevent movement in the axial direction.The rotor 7 is rotatably fitted into the case 2, and the upper end of the head 8 of the rotor 7 is non-circular in cross section. into the small-diameter shaft hole 3, the annular clearance groove 9 on the circumferential surface of the intermediate portion of the head 8 is located within the upper end of the large-diameter shaft hole 4, and the fixed disk 10 is fixed to the lower end of the large-diameter shaft hole 4. The lower end shoulder surface 12 of the head 8 is brought into contact with the upper end surface 11, and the lower end 14 of the rotor 7 protruding from the central shaft hole 13 of the fixed disk 10 is engaged with the receiving part 16 on the fixed frame 15 side. The stop plate 17 to be removed is fixed, the peripheral protrusion 18 is engaged with the stop receiving groove 6, the locking disc 19 is unrotatably fitted into the large diameter shaft hole 4 of the case 2, and the locking disc is fixed. The head 8 of the rotor 7 is fitted non-rotatably into the non-circular receiving hole 20 in the center of the locking disk 19, and the locking disk is closed by a compression coil spring 21 inserted between the fixed disk 10 and the locking disk 19. The cylindrical portion 24 of the rotor operating key rod 23 is inserted into the small diameter shaft hole 3 of the case 2 and presses down the locking disc 19 by pressing the cylindrical portion 24 of the rotor operating key rod 23 into contact with the stepped shoulder surface 22 between the small diameter shaft hole 3 and the large diameter shaft hole 4. A drive recess 25 with a non-circular cross section that matches the head 8 of the rotor 7 is provided on the lower end surface of the case 2, and when the locking disk 19 comes to the position of the escape groove 9 of the rotor 7, the upper end surface of the case 2 A positioning protrusion 27 that abuts on the upper end surface 26 of the cylindrical portion 24 is provided on the upper end periphery of the cylindrical portion 24, and a cap plate 28 that abuts on the upper end surface 26 of the case 2 is pivotally connected to the case 2 by a transverse pivot 29. A cylindrical plug 31 is rotatably fitted into the central through hole 30, and a male screw portion 32 is provided at the lower end of the cylindrical plug 31 to be screwed into the female screw portion 5 of the case 2. has a larger diameter than the central through hole 30,
A retaining protrusion 33 having a larger diameter than the central through hole 30 is provided at the upper end of the cylindrical plug 31, a non-circular convex portion or depression 34 is provided at the center of the upper end surface of the cylindrical plug 31, and a lower end of the key rod 35 for opening and closing the cap plate. A locking device with a waterproof cap plate for a manhole or the like, which is provided with a driving depression or protrusion 36 having a non-circular cross section that matches the protrusion or depression 34.