JPH067079Y2 - Lid locking device - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a lid locking device that locks a lid of a groove lid or a manhole cover to a lid receiving frame so that an inexperienced person cannot remove it. .

[Conventional technology]

As a lid locking device in a conventional groove lid or manhole cover, a type in which a lid is locked to a lid receiving frame by a key inserted into a key hole is often used.

[Problems to be solved by the invention]

However, due to the structure of the lid locking device according to the conventional locking method, there is a risk that dirt or the like will enter the inside of the lock by nature or mischief, and a specific operator removes the lid as needed. Even so, there was a problem that it could not be removed because it could not be unlocked.

[Means for solving problems]

In order to solve the above-mentioned conventional problems, the present invention relates to a lid locking device for locking a lid of a groove lid or a manhole cover to a lid receiving frame so that an inexperienced person cannot remove it. At the position, there is provided an engaging and stopping means for the receiving frame lid stopping portion which can be engaged and disengaged by a jig inserted through the operating hole, and a magnetic force is passed through the operating hole opening of the engaging and securing means but is not magnetized. A cap formed of a non-magnetic lid was attached so that it could be removed by rotating the open / close handle with a magnet, and the movable lock body capable of attracting magnets could be moved up and down at an internal position where dirt and sand did not enter. This movable lock body has a detent engagement portion that engages with the detent engagement portion of the operation hole in a disengageable manner. The flat that engages with the stopper fitting When the cap is disengaged with the magnet open / close handle engaged with the cap, the detent engagement part moves from the operation hole detent fit part due to the attraction of the handle magnet. It is characterized in that it is configured as a magnet responder of an opening / closing handle with a magnet that is pulled up to an unlocked state where it engages and disengages and that enables the cap to rotate.

[Action]

In the lid lock device having the above-mentioned configuration, the operation hole opening portion of the lid engagement / locking means is in a downward lock state in a normal state in which the detent engagement portion of the movable lock body engages with the detent engagement portion of the operation hole. Since the cap that closes up is disabled from rotating, even if an inexperienced person who does not have a dedicated opening / closing handle with a magnet attempts to remove the cap by rotating it, the cap does not rotate and cannot be removed.

Thus, when a specific operator having a dedicated opening / closing handle with a magnet removes the lid as needed, the opening / closing handle with a magnet is engaged with the cap. Then, the attracting action of the handle magnet pulls up the movable lock body, and the detent engagement portion of the movable lock engages and disengages from the detent engagement portion of the operation hole. The cap can be easily rotated and removed by rotating the cap. Then, after the cap is removed, the rotary jig of the lid engagement / engagement means is inserted from the operation hole opened, and the lid engagement / engagement means is engaged / disengaged from the receiving frame lid engagement part. The lid can be removed above the lid receiving frame.

〔Example〕

A lid lock device according to a first embodiment of the present invention will be described below with reference to FIGS. 1 to 5. In the figure, reference numeral 1 denotes a lid body including both a groove lid and a manhole cover.
1 is fitted and supported by a lid receiving frame 2 fixed to the side groove opening or the manhole opening via a packing 3 as shown in FIG. 4 is the first in the locking position of the lid 1.
As shown in the figure, it is a lock frame fitting that is separate from the lid 1 that is fitted and fixed,
It has an operation hole 5 of a lid engaging / fastening means consisting of a small diameter hole 5a, a medium diameter screw hole 5b, and a large diameter hole 5c at the opening, and a bolt insertion hole 6 is provided at the bottom. A concave groove 7 is formed as a locking fitting portion on the side of the operation hole 5 as shown in FIGS. 2 and 4 at the opposite position of the intermediate step portion between the small diameter hole 5a and the medium diameter screw hole 5b.

Reference numeral 8 denotes a lid body fixing bolt as an engagement and fastening means for the receiving frame lid stopper portion 21 of the lid body 1. The lid body fastening bolt 8 is a head portion 8a located in the small diameter hole 5a of the lock frame fitting 4. The screw portion 8b protruding downward from the bolt insertion hole 6 is screwed into and engaged with the screw hole 21a of the receiving frame lid stopper 21 to fix the lid 1 to the lid receiving frame 2. In addition, the engagement / disengagement operation of the lid fixing bolt 8 from the receiving frame lid stopper 21, that is, the removal operation of the bolt 8 is performed by a rotating jig (not shown) inserted through the operation hole 5 for the bolt head. It can be done by rotating 8a.

Reference numeral 10 is an operation hole 5 for the engaging and fastening means (lid fastening bolt 8).
A cap that seals and closes the opening of the device with an annular packing 9 so as to prevent dirt and sand from entering inside. This cap 10 is a cylindrical screw port 11 screwed into the medium-diameter screw hole 5b of the operation hole 5.
A flange portion 12 for crimping the annular packing 9 onto the opening side step portion of the operation hole 5, and a handle projection engagement portion 13 formed of a plurality of bottomed holes provided on the outer peripheral portion of the upper surface located on the flange side. A non-magnetic lid made of stainless steel or the like through which a magnetic force passes but is not magnetized, which is formed as shown in FIG. Open / close handle with magnet at the opening of the operation hole 5
It is screwed as shown in FIG. 1 so that it can be removed by a rotating operation using 16.

The opening / closing handle 16 is provided with a plurality of protrusions 19 fitted into the cap engaging portion 13 on the lower end head portion 18 of the L-shaped bent handle 17.
In addition, the permanent magnet 20 is fitted and fixed in the recess on the lower surface of the head portion 18 to serve as a dedicated cap rotating jig. twenty two
Is a movable lock body made of iron capable of attracting a magnet that can be moved up and down but cannot rotate to an internal position where the dirt and the like of the cap 10 does not enter. The movable lock body 22 is a rotation stopper for the operation hole 5. A detent engagement portion consisting of a pair of downwardly projecting claws 23 that is removably engaged with the fitting portion (concave groove 7), and a square hole 24 slidably fitted in the lock body guide portion 15 of the cap 10.
And is held by a set screw 15a screwed to the lock body guide portion 15 so as to prevent the cap from falling off when the cap is removed. The movable lock body 22 has the downwardly projecting pawl 23 as a detent engagement portion engaged with the concave groove 7 as an operation hole detent fit portion as shown in FIG. When the cap with the magnet open / close handle 16 engaged with the cap 10 as shown in FIG. 3 is removed, the downward protrusion claw 23 as the detent engagement portion is operated by the attraction action of the handle magnet 20. It is constructed as a magnetic responder of the opening / closing handle 16 with a magnet that is pulled up to the unlocked state as shown in FIG. To be done. Reference numeral 25 shown in FIG. 1 is an index portion for cap position alignment provided at a position near the lock portion of the lid 1, and this index portion 25 is provided with one handle projection engaging portion 13 of the cap 10.
By aligning, the downward projecting claw 23 of the movable lock body 22 and the concave groove 7 as the operation hole detent fitting portion when the cap is attached can be aligned with each other as shown in FIG. .

Thus, the lid lock device having the above-described structure is provided with the movable lock body 22.
When the downward projecting claw 23 is engaged in the concave groove 7 of the intermediate step portion of the operation hole as shown in FIG. 1 in the downward lock state in the normal state, the cap 10 for closing the operation hole opening of the lid fixing bolt 8 is rotated. Therefore, even if an inexperienced person who does not have the opening / closing handle 16 with a dedicated magnet tries to remove the cap 10 by rotating it, the cap 10 cannot be removed because it does not rotate.

Further, when a specific operator having the exclusive opening / closing handle 16 with a magnet removes the lid 1 as needed, the opening / closing handle 16 with a magnet is engaged with the cap 10 as shown in FIG. The movable lock body 22 is pulled up as shown in FIG. 3 by the attracting action of the handle magnet 20.
Since the downward projecting claws 23 are engaged and disengaged from the recessed groove 7, they are in the unlocked state.
The cap 10 can be easily rotated and removed by rotating the cap 10. Then, after inserting the cap, the rotary jig of the lid fixing bolt 8 is inserted through the operation hole 5 opened to remove and engage the lid fixing bolt 8 from the screw hole 21a of the receiving frame lid stopper 21. If done, the lid body 1 can be removed above the lid receiving frame 2.

6 and 7 show a lid locking device according to a second embodiment of the present invention, which is a lid 1 having a manhole cover structure in which a filling material (not shown) is filled in the lid recess 1a. As shown in FIG. 6, the lid 1 is fitted and supported by the lid receiving frame 2 fixed to the manhole opening through the packing 3. Reference numeral 8 denotes an operation hole 5 at the locking position of the lid 1 (this operation hole is formed as a through hole having a shape as shown in FIG. 7 in which square holes 5d and 5e communicate with each other on the front and rear sides.
e is a detent fitting portion of the operation hole 5) and a lid as an engagement fastening means for the receiving frame lid fastening portion 21 provided so as to be detachable by a rotating jig (not shown) inserted from the operation hole 5. With the body fixing bolt, the lid fixing bolt 8 is a hollow portion of the lid.
A screw portion 8b having a head portion 8a located inside 26 and projecting downward from the bolt insertion hole 6 is screwed into and engaged with a screw hole 21a of the receiving frame lid stop portion 21, so that the lid body 1 receives the lid receiving frame 2 It is fixed by screwing on. In addition, the engagement / disengagement operation of the lid fixing bolt 8 from the receiving frame lid stopper 21, that is, the removal operation of the bolt 8 is performed by a rotating jig (not shown) inserted through the operation hole 5 for the bolt head. It can be done by rotating 8a.

Reference numeral 10 is an operation hole 5 for the engaging and fastening means (lid fastening bolt 8).
The opening 10 has a large-diameter hole 5c that is a rotation-type cap that closes the inside to prevent dirt and sand from entering inside.This cap 10 includes a handle projection engaging portion 13 having a plurality of bottomed holes, and a movable lock body. Both side edges of 22 come into contact with each other as shown in FIG.
It has lock body guide surfaces 27 on both sides inside the cap that turn 22 and guide it so that it can move up and down, and a latch plate mounting shaft 28 with a circular cross-sectional shape protruding from the lower center part of the top plate part 14. In addition, a rectangular retaining plate 29, which is formed of a non-magnetic lid such as stainless that allows magnetic force to pass through but does not magnetize, and engages with the peripheral portion of the lower end of the operation hole 5 at the lower end of the mounting shaft 28, is integrated with the cap 10. It is fixed with a set screw 28a so that it can rotate, and this hook plate 29 is used for the operation hole 5
Set the cap 10 to 90 so that it matches the front and rear square holes 5d and 5e.
It is a cap rotation detachment method that can be rotated up and down in an angle range of degrees to remove it upward.

The movable lock body 22 is a detent fitting portion (square hole 5) of the operation hole 5.
d, 5e), a detent engagement portion composed of a pair of downwardly projecting claws 23, both side edge portions circumferentially contacting the lock body guide surface 27 in the cap 10, and the hook of the cap 10. It is formed of an iron plate having a circular hole 24a that is loosely inserted in the stop plate mounting shaft 28. Further, in the movable lock body 22, the downward projecting claw 23 serving as a detent engagement portion has a square hole 5 serving as an operation hole detent fit portion.
An opening / closing handle with a magnet that disables the rotation of the cap 10 in the downward lock state in the normal state of engaging with d and 5e as shown in FIG.
When the cap 16 is engaged with the cap 10 in the same manner as in FIG. 3, the downward protrusion claw 23 serving as a detent engagement portion by the attraction action of the handle magnet 20 is a corner as an operation hole detent fit portion. It is configured as a magnet responder of an opening / closing handle 16 with a magnet that is pulled up to an unlocked state where it engages / disengages from the holes 5d, 5e and enables the cap 10 to rotate.

FIG. 8 shows a lid locking device according to a third embodiment of the present invention. The lock frame fitting 4 of the first embodiment shown in FIG.
Is integrally formed with the lid 1, and the receiving frame lid stopper of the lid 1
A rotation operation body 30 attached to the lock frame portion so that the engagement and attachment means for 21 can be rotated by a rotation jig (not shown) inserted from the operation hole 5, and this rotation operation. The first embodiment is constituted by a rotation engaging / disengaging plate 31 that engages with the lower surface of the receiving frame lid stopper 21 fixed by a set screw 30a so as to rotate integrally with the lower end of the body 30. The other configuration is the first
Since it is similar to that of the first embodiment shown in FIGS. 5 to 5, the same parts are designated by the same reference numerals and detailed description thereof will be omitted.

[Effect of device]

The lid locking device of the present invention is an opening / closing handle with a dedicated magnet.
It is a method of unlocking using 16, and since the movable lock body 22 as a magnetic responder is incorporated in the internal position of the cap 10 where dirt and the like do not enter, there is a problem that unlocking due to entry of dirt and the like occurs. The specific operator having the opening / closing handle 16 with a dedicated magnet can easily unlock and lock it as needed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a main part of a lid locking device according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. Is an operation explanatory view showing a state when the movable lock body is unlocked, FIG. 4 is a sectional view of parts of the lock frame fitting, FIG. 5 is a sectional view of parts of the cap and the movable lock body,
FIG. 6 is a longitudinal sectional view showing a main part of a lid locking device according to a second embodiment of the present invention, and FIG. 7 is a VII-VII of FIG.
FIG. 8 is a sectional view taken along the line, and FIG. 8 is a longitudinal sectional view showing a main part of a lid lock device according to a third embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Lid body, 2 ... Lid receiving frame, 5 ... Operation hole, 5d, 5e ... Square hole as operation hole detent fitting part, 7 ... Recessed groove as operation hole detent fitting part, 8 ... Engagement stop Lid fixing bolts as attaching means, 10 ... Cap formed of non-magnetic lid, 13 ... Handle protrusion engaging portion, 15 ... Lock body guide portion, 16 ... Open / close handle with magnet, 19 ... Handle protrusion, 20 ... Handle magnet, 21 ...
Receiving frame lid stop portion, 21a ... Screw hole, 22 ... Movable lock body, 23 ... Downward projecting claw as a rotation stop engaging portion of the movable lock body, 24 ... Square hole, 27 ... Lock body guide surface, 29 ... Cap hook Board, 30 ...
A rotary operation body serving as a lid engaging / securing means, 31 ... A rotary engaging / disengaging plate serving as a lid engaging / securing means.

Claims (1)

[Scope of utility model registration request] 1. A lid locking device for locking a lid of a groove lid or a manhole cover to a lid receiving frame so that an inexperienced person cannot remove the lid, and the lid locking device is inserted into a locking position of the lid through an operation hole. And an operation hole opening portion of the engagement / fastening means formed by a non-magnetic lid that allows magnetic force to pass through but does not magnetize. Has a detachable cap that is attached so that it can be removed by a rotating operation using an opening / closing handle with a magnet, and a detent engagement portion that releasably engages with the detent engagement portion of the operation hole. The cap is equipped with a movable lock body capable of attracting a magnet that can move up and down but cannot rotate in an internal position where dirt or the like does not enter. Descent during normal time to engage the stop fitting In the locked state, the cap cannot be rotated, and when the cap with the magnet-operated opening / closing handle engaged with the cap is removed, the detent engagement part engages from the operation hole detent fitting part by the attraction action of the handle magnet. A lid lock device, which is configured as a magnet responder of an opening / closing handle with a magnet that is pulled up to a lock release state to be engaged and disengaged and that allows the cap to rotate.