JP5559822B2 - Obturator for opening operation tool insertion hole in manhole cover - Google Patents

Description

  This invention is attached to a manhole cover which is an entrance to a joint groove or the like that embeds wires, cables, etc. in the ground, and the opening operation tool insertion hole provided in the cover is in an unusable state at normal times It relates to an obturator used to secure.

  Conventionally, what was described in patent document 1 is known as an obstruction | occlusion tool of an opening operation tool insertion hole. The obturator has a lock shaft storage part and a lock unit storage part formed in the skirt part of the obturator body, and the stopper plate screwed to the lock shaft moves up and down by the rotation of the lock shaft and the opening operation tool is inserted. The obturator body is fastened and fixed to the lid by being in close contact with the bottom surface of the hole edge. By simply rotating the lock shaft, the tip of the stopper plate is still left in the lower space below the hole edge of the opening operation tool insertion hole, and when removing the skirt from the opening operation tool insertion hole The tip of the stopper plate becomes an obstacle. In order to enable the skirt part to be removed from the opening operation tool insertion hole, it is necessary to move the tip of the clasp plate into the space below the opening operation tool insertion hole. Become. For this reason, the lock unit is removed from the lock unit storage portion, and the top plate portion is slid along the lid by the width of the front end portion of the stopper plate.

JP 2011-12499 A

In the above-described conventional closure device for the opening operation tool insertion hole, when attaching / detaching to the lid, the operation of rotating the lock shaft by the operation handle, the attachment / detachment operation of the lock unit with key operation, and the opening operation tool insertion hole Therefore, there is a problem that an operator may be confused at the time of detachment.
Therefore, the invention according to this application is to provide an obturator that can be easily attached / detached / unlocked to / from the opening operation tool insertion hole only by an attaching / detaching operation in the vertical direction and a locking / unlocking operation with a key. Objective.

Hereinafter, the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.
In order to solve the above-described problem, the obturator 1 of the invention according to this application includes a top plate portion 7 that abuts the upper surface of the lid 41 and closes the insertion hole 42 of the lid operating tool in the state of being attached to the lid 41, and the insertion. The main body 2 of the obturator having the cylinder portion 8 fitted in the circular hole portion 42a of the hole 42 and opened up and down, and is fixed to the lower surface of the top plate 7 at the upper end and extends downward along both sides of the cylinder portion 8. A frame body 3 that includes a pair of parallel leg portions 9 and a support plate portion 10 that joins the lower ends of the leg portions 9, and is fitted into the rectangular hole portion 42 b of the insertion hole 42 in a mounted state on the lid 41; It has an inner cylinder portion 12 that is inserted into the cylinder portion 8 so as to be rotatable about its axis, and a screw rod portion 13 that extends downward from the cylinder portion 8 and is rotatably supported by the support plate portion 10 of the frame at the lower end. Rotor 4 and rotor A plurality of disc tumblers 5 which are accommodated in the cylinder portion 12 and can be rotated integrally with the rotor 4 by being aligned by insertion of keys and aligned with the rotor 4, and located inside the frame body 3. The screw 4 is screwed into the screw rod portion 13 of the rotor 4, and is moved up and down by coming into contact with the leg portion 9 of the frame body and is prevented from rotating. A fastener 6 is provided. The leg portion 9 of the frame 3 includes a first abutting portion 9 c that stops the rotation by disposing the stopper 6 in a direction substantially perpendicular to the long axis of the insertion hole 42 when the rotor 4 is rotated in the tightening direction. And a second abutting portion 9d that stops the rotation by disposing the stopper 6 in the long axis direction of the insertion hole 42 when rotating in the loosening direction. With the key, the rotor 4 is rotated a predetermined number of times in the loosening direction so that the stopper plate 6 is separated from the lower surface of the lid 41 and can be extracted from the insertion hole 42.

  According to the obturator according to this application, it is possible to easily attach to and detach from the insertion hole and lock and unlock only by the attaching and detaching operation in the vertical direction and the locking and unlocking operation with the key.

It is a front view of the state where the obturator concerning the embodiment of the present invention was attached to the lid, and was locked. It is a top view of the obturator of FIG. It is a bottom view of the obturator of FIG. It is a side view of the obturator of FIG. It is sectional drawing of the obturator of FIG. It is sectional drawing of the unlocking state of the obturator of FIG. It is sectional drawing of the VII-VII line position of FIG. 6, (A) shows an unlocked state, (B) shows a locked state.

Embodiments of the present invention will be described with reference to the drawings.
A manhole cover 41 to which the obturator 1 is applied has an insertion hole 42 for an opening operation tool. The insertion hole 42 includes a circular hole portion 42a and rectangular hole portions 42b on both sides thereof. The diameter of the circular hole portion 42a is formed to be slightly larger than the width dimension of the rectangular hole portion 42b. A recess 43 is formed around the insertion hole 42 on the surface side of the lid 41. The obturator 1 is attached to and detached from the lid 41 in order to close and lock the insertion hole 42.

  As shown in FIGS. 5 and 6, the obturator 1 includes a main body 2, a frame 3 assembled to the main body 2, a rotor 4, a disk tumbler 5, and a fastener 6. The cylinder portion 8, the rotor 4, and the disk tumbler 5 of the main body 2 constitute a cylinder lock (a sidebar type disk cylinder lock in the illustrated embodiment).

  The main body 2 of the obturator has a top plate portion 7 and a cylinder portion 8. The top plate portion 7 has a planar view shape that fits into the recess 43 of the lid 41, and closes the insertion hole 42 by contacting the upper surface of the lid 41 in the mounted state. The cylinder portion 8 extends downward from the substantially central portion of the top plate portion 7 and opens up and down. The outer diameter of the cylinder portion 8 is smaller than that of the circular hole portion 42a of the insertion hole 42 as shown in FIGS. The cylinder portion 8 is fitted into the circular hole portion 42 a of the insertion hole 42.

  The frame 3 is configured by a plate-like body that is refracted in a generally U-shape, and includes a pair of parallel legs 9 and a support plate 10 that couples the legs 9 together. The frame 3 has a rectangular shape in which the outer shape in a plan view fits inside the rectangular hole portion 42b of the insertion hole 42, and is fitted into the rectangular hole portion 42b when mounted. The leg portion 9 includes a main body portion 9a facing each other in parallel with each other and a holding plate portion 9b extending by being bent by 90 ° from an edge of the main body portion 9a, and a bolt 11 is attached to the lower surface of the top plate 2 of the main body at the upper end. And fixed at the lower end by the support plate 10. The holding plate portion 9b is provided on the opposite edges of the leg portion 9.

  The rotor 4 includes an upper inner cylinder portion 12 and a lower screw rod portion 13. The inner cylinder part 12 is inserted into the cylinder part 8 of the main body 2 so as to be rotatable about its axis. The screw rod portion 13 extends downward from the cylinder portion 8 and is rotatably supported by the support plate portion 10 of the frame at the lower end.

  A plurality of disc tumblers 5 are accommodated in the inner cylinder portion 12 of the rotor 4. The disk tumbler 5 is aligned by insertion of a key (not shown), so that the engagement with the cylinder portion 8 is released and the disk tumbler 5 can rotate integrally with the rotor 4.

  The fastener 6 is formed by bending the plate material in a substantially U-shape, and includes a substrate portion 14 and a clamping plate portion 15 extending upward from both ends of the substrate portion 14 at a right angle. The substrate portion 14 has a screw hole 14 a that is screwed into the screw rod portion 13. The stopper 6 is positioned inside the frame 3 and is screwed to the screw rod portion 13 of the rotor, and is moved up and down by coming into contact with the leg portion 9 of the frame 3 and being prevented from rotating. As shown, it is fastened to the lower surface of the hole edge portion of the insertion hole 42 of the lid 41 at the upper position.

  The leg portion 9 of the frame body 3 has first and second abutting portions 9 c and 9 d that abut on the fastening plate portion 15 of the stopper metal 6. When the rotor 4 is rotated in the direction of tightening (clockwise in FIG. 2), the first abutting portion 9c abuts against the tightening plate portion 15 of the fastener 6 as shown in FIG. 7B. Stop the rotation. When the rotor 4 is rotated in the loosening direction (counterclockwise in FIG. 2), the second abutting portion 9d abuts against the fastening plate portion 15 of the fastener 6 as shown in FIG. Prevent rotation. As shown in FIG. 7B, the stopper 6 is disposed in a direction substantially perpendicular to the major axis of the insertion hole 42 in a state where it is in contact with the contact portion 9c. As shown in FIG. 5, the substrate portion 14 is disposed in a direction along the long axis of the insertion hole 42 (a state accommodated inside the frame body 3) while being in contact with the contact portion 9 d.

  Therefore, when a key (not shown) is inserted and the rotor 4 is rotated in the tightening direction (clockwise in FIG. 2), the stopper 6 is raised and the lid 41 is tightened as shown in FIG. When the rotor 4 is rotated in the opposite direction, the stopper 6 is lowered, and as shown in FIG. 4, in a state where it stops in contact with the support plate portion 10 of the frame 3, as shown in FIG. Housed inside the frame 3. In this state, the lower part of the obturator 1 passes through the insertion hole 42 in the vertical direction without hindrance.

  In use, the lower part of the obturator 1 is inserted into the insertion hole 42 in a state in which the stopper 6 is disposed at the lowermost end (FIGS. 6 and 7), and the top plate 7 is disposed on the recess 43 of the lid 41. . When a key (not shown) is inserted into the keyhole and rotated a predetermined number of times in the clockwise direction in FIG. 2, the stopper 6 is raised and the lid 41 is tightened (FIG. 4). If the key is removed in this state, the obturator 1 is locked with the insertion hole 42 closed.

  In the state in which the stopper 6 tightens the lid 41, the stopper 6 is in the position shown in FIG. 7B, and is inclined with respect to the long axis of the insertion hole 42. In FIG. 5, for the sake of simplicity, they are arranged almost at right angles.

DESCRIPTION OF SYMBOLS 1 Obstruction tool 2 Obstruction tool main body 3 Frame body 4 Rotor 5 Disc tumbler 6 Fastener 7 Top plate 8 Cylinder part 9 Leg part 9a Main part 9b Holding part 9c 1st contact part 9d 2nd contact part 10 Support Plate portion 11 Bolt 12 Inner tube portion 13 Screw rod portion 14 Substrate portion 14a Screw hole 15 Tightening plate portion 41 Cover 42 Opening operation tool insertion hole 42a Circular hole portion 42b Rectangular hole portion 43 Recessed portion

Claims (1)

A closing tool for closing and locking the insertion hole of the lid having an insertion hole of the opening operation tool composed of a circular hole part and a rectangular hole part on both sides thereof,
A main body of an obturator having a top plate portion that abuts the upper surface of the lid in the mounted state on the lid and closes the insertion hole, and a cylinder portion that is fitted into the circular hole portion of the insertion hole and opens up and down;
A pair of parallel legs fixed to the lower surface of the top plate of the main body at the upper end and extending downward along both sides of the cylinder part; and a support plate part connecting the lower ends of the legs, a frame body which is fitted into the rectangular hole of the previous SL differential lump hole in the attached state of the cover,
A rotor having an inner cylinder portion that is rotatably inserted into the cylinder portion in the main body and a screw rod portion that extends downward from the cylinder portion and is rotatably supported by the support plate portion of the frame at the lower end. When,
A disc tumbler which is housed in the inner cylinder portion of the rotor and can be rotated integrally with the rotor by releasing the engagement with the cylinder portion by aligning by inserting a key;
Positioned inside the frame body, screwed into the screw rod portion of the rotor, and moved up and down by abutting against the leg portion of the frame body to prevent rotation, and at the upper position, the hole edge of the insertion hole of the lid A fastening member fastened to the lower surface of the part,
Legs of the frame body, a first contact portion which prevent rotation disposed in a direction substantially perpendicular to the long axis of the tightening direction during rotation to the fastener pre Symbol differences inclusive hole of said rotor, loosening of the rotor and a second contact portion which prevent rotation by placing the fastener when rotating in the axial direction of the differential inclusive hole,
The opening operation tool insertion hole in the manhole cover can be extracted from the insertion hole in a state where the key is rotated a predetermined number of times in the loosening direction by the key and the clasp is separated from the lower surface of the cover. Obturator.

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