JPH067078Y2 - 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 proposes a lid locking device in which a lid of a groove lid or a manhole cover is locked to a lid receiving frame so that an inexperienced person cannot remove it. A locking cap formed with a non-magnetic lid was fitted in the cap fitting hole at the lid lock part so that it could be rotated by the engagement of the opening / closing handle with a magnet. On the side, a locking and disengaging type lid locking means that rotates together with the cap is provided, and the movable lock body capable of magnet attraction can be moved up and down, but it can rotate up and down at an internal position of the cap where dirt and the like does not enter. The movable lock body has a detent engagement portion that releasably engages with the detent engagement portion at the inner bottom of the cap fitting hole, and this detent engagement portion does not rotate. When engaging with the stopper mating part When the cap is disabled to rotate in the descending lock state and the cap with the magnet-operated opening / closing handle is engaged with the cap is removed, the detent engagement part moves from the detent fit part to the engagement 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 a lock release state to be detached and that allows the cap to rotate.

[Action]

Since the lid locking device having the above configuration disables rotation of the cap 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 inner bottom portion of the cap fitting hole, Even if an inexperienced person who does not have a dedicated opening / closing handle with a magnet tries to remove the lid locking means by rotating the cap, the locking cap does not rotate and the locking means cannot be unlocked.

Thus, when a specific operator having an opening / closing handle with a dedicated magnet removes the lid as needed, when the opening / closing handle with a magnet is engaged with the cap, the suction action of the handle magnet is obtained. The movable lock body is pulled up with
Since the detent engagement portion of the movable lock body can be unlocked by engaging and disengaging from the detent engagement portion of the inner bottom of the cap fitting hole, the handle can be rotated in this state to By rotating the cap so that the engaging portion of the lid locking means engages and disengages from the receiving frame lid stopper, 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. In the figure, reference numeral 1 denotes a lid body including both a groove lid and a manhole cover.
Is fitted and supported on the lid receiving frame 2 fixed to the gutter opening or the manhole opening as shown in FIG. Reference numeral 3 denotes a downward projecting port provided integrally with the lid body 1 at the lock position of the lid body 1,
A cap fitting hole 4 having a diameter larger than that of the lock hole 3a is provided in the upper surface of the lid 1 so as to surround the upper end opening of the lock hole 3a, which is the inner hole of the projecting opening 3. At the inner bottom portion of the dowel hole 4, a detent fitting portion formed of a pair of concave grooves 5 opened as shown in FIG. 2 is formed at a position facing the lock hole 3a.

Reference numeral 6 denotes a locking cap rotatably fitted in the cap fitting hole 4 of the lid body 1 through an annular seal packing 7, and the locking cap 6 is an annular seal packing 7.
A flange portion 8 for crimping, a handle projection engaging portion 9 composed of a plurality of bottomed holes recessed in the outer peripheral portion of the upper surface located on the flange side, and a rectangular cross-sectional shape protruding in the lower center portion. It is formed as a non-magnetic lid made of stainless steel or the like through which a magnetic force passes but does not magnetize, which has a lock body guide portion 10, and is fitted as shown in FIG. 1 so that it can be rotated by a rotating operation using an opening / closing handle with a magnet 11. Has been done.

The opening / closing handle 11 is provided with a plurality of protrusions 14 fitted into the cap engaging portion 9 on the lower end head portion 13 of the L-shaped bent handle 12.
In addition, the permanent magnet 15 is fitted and fixed in the recess of the lower surface of the head portion 13 to serve as a dedicated cap rotating jig.

Reference numeral 16 is a locking means for the receiving frame lid stop portion 21 of the lid body 1. The lid body locking means 16 is inserted from the lock body guide portion 10 into the lock portion hole 3a so as to rotate integrally with the cap 6. And a rotating shaft 17 which is integral with or separate from the cap 6 and is fixed to the lower end of the rotating shaft 17 by a set screw 17a so as to rotate integrally with the rotating shaft 17. As shown in FIG. 1, the tip engaging portion 18a of the rotary locking body 18 is attached to the lower side surface of the receiving frame lid stopper 21 by rotating the cap 6 in one direction. It is structured such that it is engaged with the receiving frame lid stopper 21 so that the lid 1 cannot be removed upward. It should be noted that the rotation range of the rotation locking body 18 is a range in which the distal end engaging portion 18a is rotated 90 degrees clockwise or counterclockwise from the state in which the tip engaging portion 18a is engaged with the receiving frame lid stop portion 21. The rotation range is regulated by a stopper (not shown) provided on the lid 1 side. Therefore, when the rotation locking body 18 is rotated in the predetermined angular range by rotating the cap 6 in the other direction, the tip engaging portion 18a is disengaged from the receiving frame lid stopper portion 21 and the lid body is closed. It is possible to remove 1 above the lid receiving frame 2.

Reference numeral 19 denotes a movable lock body made of iron capable of attracting a magnet that can be moved up and down but cannot rotate in an internal position where the dirt and the like of the cap 6 does not enter.
Is a detent engagement portion formed of a pair of downward projecting claws 19a that is removably engaged with a detent engagement portion (concave groove 5) at the bottom of the cap fitting hole 4, and a lock body guide portion of the cap 6. It has a square hole 20 that is slidably fitted into the hole 10. And this movable lock body 19
Is a downward locking state in the normal state in which the downward protruding claw 19a serving as a detent engagement portion engages with the groove 5 serving as a detent fitting portion as shown in FIG. When the handle 11 is engaged with the cap 6 as shown in FIG. 3, the downward protrusion claw 19a serving as the detent engagement portion by the attraction action of the handle magnet 15 causes the downward groove 5 serving as the detent engagement portion. It is constructed as a magnetic responder of the opening / closing handle 11 with a magnet that is pulled up to the unlocked state as shown in FIG.

Thus, the lid lock device having the above-mentioned structure is provided with the movable lock body 19
When the downward projecting claw 19a of the above is in the downward lock state in the normal state in which the downward protruding claw 19a engages the concave groove 5 in the inner bottom of the cap fitting hole 4 as shown in FIG.
Since the locking cap 6 cannot be rotated, even if an inexperienced person who does not have the dedicated opening / closing handle 11 with a magnet rotates the cap 6 to remove the lid locking means 16, the locking cap 6 does not rotate. The locking means 16 cannot be disengaged.

Further, when a specific operator having the exclusive opening / closing handle 11 with a magnet removes the lid 1 as needed, the opening / closing handle 11 with a magnet is engaged with the cap 6 as shown in FIG. , The movable lock body 19 is pulled up as shown in FIG.
Since the downward protruding claw 19a of the above can not be unlocked by engaging and disengaging from the recessed groove 5, by rotating the opening / closing handle 11 with a magnet in this state, the cap 6 can be locked. The lid 1 can be removed above the lid receiving frame 2 by rotating the stopper 16 to a position where it can be removed.

FIG. 4 shows a lid locking device according to a second embodiment of the present invention. The inner bottom portion of the cap fitting hole 4 and the downward projecting opening 3 portion shown in FIG. The structure is different in that it is formed by a separate receiving metal fitting 23, and the three-way extending portion 23a of the receiving metal fitting 23 is fastened and fixed to the lower surface portion of the lid 1 by a bolt 24. Other configurations and operations are the same as those of the first embodiment shown in FIGS. 1 to 3, and therefore, the same parts are designated by the same reference numerals and detailed description thereof will be omitted.

5 and 6 show a lid locking device according to a third embodiment of the present invention, in which the lid locking means 16 is a receiving frame lid stopper.
It is configured by a fastening bolt 22 having a screw engaging portion 22a that is screwed into the screw hole 21a of 21, and the lock body guide portion 10 that is the root portion of the fastening bolt 22 is formed in a hexagonal shape. A hexagonal hole serving as a handle projection engaging portion 9 is provided at the center thereof, and the hexagonal projection 14a of the open / close handle 11 with a magnet is engaged with the hexagonal hole so that the locking cap 6 can be rotated. A disk portion 19b having a hexagonal hole 20a into which the movable lock body 19 is slidably fitted in the hexagonal lock body guide portion 10, and a concave groove formed on both sides of the disk portion 19b so as to project from the inner bottom portion of the cap fitting hole 4. 5 is different from the first and second embodiments in that it is configured with a protruding piece portion 19c as a detent engagement portion that engages so as to be disengaged upwards, and other configurations and actions are as shown in FIG. Since it is similar to that of the first embodiment shown in FIG. 3, detailed description will be given by attaching the same reference numerals to the same parts. It omitted. In addition,
Reference numeral 25 shown in FIG. 5 is a packing for supporting the lid body 1 on the lid receiving frame 2.

[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 by using 11, and since the movable lock body 19 as a magnet responding body is incorporated in the locking cap 6 at an internal position where dirt or the like does not enter, unlocking due to entry of dirt or the like is impossible. The problem can be solved, and a specific operator having a dedicated magnet-equipped opening / closing handle 11 can easily unlock and lock the lid lock device 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. FIG. 4 is an explanatory view of the operation of the movable lock body when unlocked, FIG. 4 is a longitudinal sectional view showing the main part of the lid lock device according to the second embodiment of the present invention, and FIG. FIG. 6 is a vertical sectional view showing a main part of a lid lock device according to a third embodiment of the invention, and FIG. 6 is a sectional view taken along the line VI-VI in FIG. DESCRIPTION OF SYMBOLS 1 ... Lid body, 2 ... Lid receiving frame, 4 ... Cap fitting hole, 5 ... Groove on the inner bottom of cap fitting hole (locking fitting part), 6 ... Locking cap, 9 ... Handle protrusion engaging part, 10 ... Lock body guide part, 11 ... Open / close handle with magnet, 14, 14a ... Handle protrusion, 15 ... Handle magnet, 16 ... Lid locking means, 17 ... Rotating shaft, 18 ... Rotating locking body, 18a ... Tip Engaging portion, 19 ... Movable lock body, 19a ... Downward projecting claw serving as rotation stopping engaging portion, 19c ... Disk both-side projecting piece portion serving as rotation stopping engaging portion, 21 ... Receiving frame lid stopping portion,
21a ... Screw hole, 22 ... Fixing bolt as lid locking means, 2
2a ... Screw engaging part of fastening bolt.

Claims (1)

[Scope of utility model registration request] 1. A lid locking device for locking a groove lid or a lid of a manhole cover to a lid receiving frame so that an inexperienced person cannot remove the lid, which is formed of a non-magnetic lid through which magnetic force is passed but which is not magnetized. A locking cap that is fitted into the cap fitting hole at the lid lock part so that it can be rotated by engagement of the opening / closing handle with a magnet, and the locking cap rotates integrally with the cap below the center of the locking cap. And a lid engaging means of a rotational engagement / disengagement type for engaging the lid with a receiving frame lid stopper, and releasably engageable with a detent engagement portion at the inner bottom of the cap engagement hole. The cap includes a movable lock body capable of attracting and attracting a magnet, which has a detent engagement portion and is incorporated so that earth and sand of the cap do not enter, but cannot rotate. When the locking engagement part engages with the rotation stop fitting part When the cap is not rotatable in the down lock state and the opening / closing handle with magnet is engaged with the cap and the cap is removed, the detent engagement part is disengaged from the detent fit part by the attraction of the handle magnet. The lid locking device is configured as a magnet responsive body of an opening / closing handle with a magnet that is pulled up to an unlocked state to allow the cap to rotate.