JP3809555B2 - Locking device for underground structure lid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a locking device for a cover for an underground structure such as a manhole cover, a meter inspection port cover or a valve operation port cover.
[0002]
[Prior art]
As a conventional lid locking device of this type, for example, one that has been filed by the applicant of the present application and published as Japanese Utility Model Publication No. 6-30001 can be cited.
[0003]
The conventional device is for an underground structure in which a bottom plate portion of a recessed portion provided on a peripheral portion of a lid body is provided with a locking member that engages with a lock seat of a frame body and a plug that controls turning of the locking member. In the lid, a lock provided with an advanceable / retractable latch that engages with an engaging portion formed on the peripheral surface of the head of the plug is detachably disposed on the bottom plate portion of the burl insertion hole.
[0004]
[Problems to be solved by the invention]
The lid for an underground structure according to the present invention eliminates the plug and the latch interposed between the lock and the lock of the cylinder lock or the like in the above-mentioned conventional device, and makes the structure extremely simple to reduce the cost. In addition, the present invention has been proposed for the purpose of ensuring that the reliability of locking is sufficiently maintained without deteriorating despite the fact that the structure is simplified.
[0005]
The present invention should also be noted with respect to the fact that the way of thinking about how to use the cylinder lock has been changed. In short, the cylinder lock according to the present invention forms a plug for the burl insertion hole which itself is a burr operating opening when locked, and disables the operation of the lock member by the burl.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a locking device for a lid for an underground structure according to the present invention includes a circular lid and a frame for fitting and housing the lid inside, the former being fitted into the latter. In the outer periphery of the outer surface of the lid body, a horizontal projection with an inner edge portion formed on the lower side forms a deformed bur insertion hole, and the lid body in the vicinity of the bur insertion hole A locking member is provided on the lower surface of the frame, and is formed with an inclined piece supported in a swingable manner by a horizontal pivot and biased in a direction to engage with the lock seat of the frame body and a receiving piece facing the bar insertion hole. On the other hand, the outer frame with a built-in cylinder lock is directly attached to or removed from the burr insertion hole on the lid, so that the outer frame can be easily attached and removed. possible to thereby set so that it is possible to fit a non-rotatably, is formed in the outer frame stage Bar insertion holes engaged with the formed receiving portion and as outer frame is not exited downward, also the locking piece fixed to the inner cylinder of the cylinder lock that is supported on the outer frame inside edge Therefore, the inner cylinder of the cylinder lock can be rotated between the position where the locking piece engages with the inner edge and the position where it does not engage, By fitting the frame into the burl insertion hole and engaging the locking piece with the inner cylinder edge, the burr insertion hole is sealed, the lid is locked to the frame, and the locking piece is turned with a key. The cylinder lock is pulled out from the bar insertion hole, and the receiving piece of the locking member is exposed in the burr insertion hole. By operating this receiving piece with the bar, the engagement between the inclined piece and the locking member is released, and the lid is locked. It is characterized by solving the state.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the drawings.
1 to 3, reference numeral 1 denotes a frame installed at an opening portion of the pavement surface 10 or the like, and the opening is used as a manhole, a meter inspection port, a valve operation port, or the like. Reference numeral 2 denotes a lid that is fitted to the frame 1 so as to be openable and closable.
[0008]
A movable lock member 3 that is engaged with and disengaged from the lock seat 11 of the frame 1 is provided on the lower surface peripheral portion of the lid 2. In FIG. 2, the lock member 3 indicated by a solid line is in a locked state, and the lock member 3 indicated by a chain line occupies an unlocked position.
[0009]
The lock member 3 in the illustrated example is swingable with a pivot 31 with respect to the lid 2 so that the lock position is maintained by its own weight or urging of a spring (not shown).
[0010]
The lock member 3 may be of a slide type that can be displaced linearly with respect to the lid 2 as long as the lock member 3 is movable so as to be displaced from the lock position to the unlock position by a bar inserted from a bar insertion hole 21 described later. .
[0011]
A bar insertion hole 21 for operating the lock member 3 from the outside with a bar is provided in the vicinity of the lock member 3 in the lid 2. The burl insertion hole 21 in the illustrated example is formed as a U-shaped notch, but may be, for example, an oval or other shape.
[0012]
The cylinder lock 4 that is detachably fitted into the burl insertion hole 21 employs a known pin tumbler lock, disc tumbler lock, rotary disc tumbler lock, or the like. As clearly shown in FIG. A tube 42 is provided.
[0013]
In the illustrated cylinder lock 4, the outer cylinder 41 is fixed in a hollow outer frame 43 by a bottom plate 44 and a set screw 45, and a lock lid 46 provided on the upper surface of the outer frame 43 is opened and closed as necessary. It is installed as possible.
[0014]
The lock lid 46 prevents dust and mud from entering and getting clogged in a key hole (not shown) provided in the key guide 47, except when a key (not shown) is inserted. ) Is closed as indicated by the solid line.
[0015]
The closed state of the lock lid 46 is maintained by screwing the bottomed cylindrical connecting piece 48 attached to the lock lid 46 so as to be rotatable and axially displaceable to the cylindrical mouth portion of the outer frame 43. The connecting piece 48 is engaged with and disengaged from the mouth of the outer frame 43 by rotating with a wrench (not shown) engaged with the tool engaging portion 49.
[0016]
When the lock cover 46 is opened as shown by a chain line in FIG. 4A or FIG. 2, a key (not shown) is inserted downward as shown by an arrow P into the key hole of the cylinder lock 4 and is inserted into, for example, 90 °. Rotate within an angular range.
[0017]
At the lower end (inward end) of the inner cylinder 42 rotated by the key, a locking piece 5 having an engagement end 51 protruding outward in the horizontal direction is fixed by a pin 52 or the like. The engaging ends 51 are provided at both ends of the locking piece 5 in the illustrated example, but may be provided only at one end.
[0018]
As shown in FIGS. 1 to 3, the cylinder lock 4 including the outer frame 43 and its lid 46 is normally held in the burl insertion hole 21 in a restrained state, in other words, a lid for an underground structure. When 2 is locked in the closed state, the engaging end 51 of the locking piece 5 is engaged with the inner edge 22 (see FIG. 3) of the burl insertion hole 21 in the lid 2.
[0019]
In this state, the burl insertion hole 21 is sealed with the cylinder lock 4 itself, so that the burl cannot be inserted, and the displacement operation of the lock member 3 by the burl cannot be performed.
[0020]
Therefore, the lid 2 is locked to the frame 1 and cannot be opened unless the cylinder lock 4 is removed using a key.
[0021]
In FIG. 4, reference numeral 53 is a stopper protruding from the bottom plate 44 of the outer frame 43 in the cylinder lock 4, and restricts the rotation range of the locking piece 5 that rotates together with the inner cylinder 42.
[0022]
If the outer frame 43 that is integrally fixed to the outer cylinder 41 of the cylinder lock 4 is rotatable in the burl insertion hole 21, there will be a problem with respect to the rotation operation of the locking piece 51 (the locking piece 51). Therefore, the outer shape of the cross section is non-circular.
[0023]
The burl insertion hole 21 is provided with a receiving portion 23 for preventing the cylinder lock 4 fitted from above from coming out from below (see FIG. 3). The receiving portion 23 is formed of a stepped portion, a ridge, a protrusion, and the like, and receives the stepped portion 24 and the like of the outer frame 43 from below.
[0024]
In the cylinder lock 4 incorporated in the illustrated locking device, the outer cylinder 41 and the outer frame 43 are made as separate bodies, but they can also be made as one body.
[0025]
In order to open the lid 2 in the locked state as described above, after opening the lock lid 46, a key is inserted into the key hole of the cylinder lock 4, and rotated 90 ° clockwise, for example, together with the inner cylinder 42. Since the engaging end 51 of the moving locking piece 5 is disengaged from the inner edge portion 22 of the burl insertion hole 21, the cylinder lock 4 is pulled out outward (upward) as indicated by the arrow Q from the burl insertion hole 21 as a whole. be able to.
[0026]
Therefore, if the bar is inserted from the opened bar insertion hole 21 and the lock member 3 is swung from the position indicated by the solid line in FIG. 2 to the position indicated by the chain line, the lock member 3 and the lock seat 11 of the frame 1 are Thus, the lid 2 is unlocked and can be opened.
[0027]
In FIG. 2, reference numeral 32 denotes an inclined piece integrally provided on the lower end side of the lock member 3, and the inclined surface automatically moves the lock member 3 with respect to the lock seat 11 when the lid body 2 is closed with respect to the frame body 1. It acts as a guide surface for engaging with. Reference numeral 33 denotes a bar receiving piece integrally protruding from the upper end side of the lock member 3.
[0028]
The portion of the lid 2 opposite to the portion provided with the locking device (the portion on the right side of the lid 2 in FIG. 1) is normally pivotally attached to the frame 1.
[0029]
If the pivoting means can be mounted and disengaged, it is convenient because the lid 2 can be removed not only by swinging and opening.
[0030]
【The invention's effect】
In the above-described underground structure lid locking device of the present invention, the cylinder lock itself, which is designed to be attached and detached with a key, closes the bar insertion hole (insertion hole) of the lid body. The linkage member material such as the latch that is interposed between the lock member and the lock member is removed, and the lock member is operated directly with the bar during unlocking, so the structure is simple and the cost can be greatly reduced. There is an effect that the certainty of the state is not inferior at all.
[Brief description of the drawings]
FIG. 1 is a plan view showing a main part of an embodiment of the present invention.
FIG. 2 is a partially longitudinal side view taken along line II-II in FIG.
3 is an enlarged partial longitudinal sectional front view taken along line III-III in FIG. 1. FIG.
4 is an enlarged view of a cylinder lock portion removed from the embodiment of FIG. 1, in which (A) is a longitudinal side view, (B) is a front view, and (C) is a bottom view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame 11 Lock seat 2 Lid 21 Bar insertion hole 22 Inner edge 23 Receiving part 3 Lock member 4 Cylinder lock 41 Outer cylinder 42 Inner cylinder 5 Locking piece

Claims (1)

A circular lid body and a frame body in which the lid body is fitted and stored are locked in a state in which the former is fitted in the latter, and is arranged on the outer peripheral portion of the lid body on the lower side. A horizontal projection with a continuous edge forms an unusually shaped bar insertion hole, which is supported on the lower surface of the lid in the vicinity of the bar insertion hole so as to be swingable by a horizontal pivot and is engaged with the lock seat of the frame. A locking member is formed which forms an inclined piece biased in the direction of joining and a receiving piece facing into the burr insertion hole, while the outer frame containing the cylinder lock is directly fitted into the burr insertion hole of the lid. wear and or withdrawn, in order to simplify the outer frame detachable structure Te hereinafter, and sets type so that it fitted so as not to rotate in the detachable external shape of the outer frame to the bar insertion hole, the outer frame The outer frame does not come out downward by engaging the formed step and the receiving part formed in the burl insertion hole. Unishi, also arranged a locking piece fixed to the inner cylinder of the cylinder lock carried by the outer frame from the lower end of the inner edge downward, than Te, by the rotation of the inner cylinder of the cylinder lock, engages The stopper can be rotated between a position where it engages with the inner edge and a position where it does not engage, the outer frame is fitted into the burl insertion hole, and the locking piece is engaged with the inner cylinder edge. By sealing the burl insertion hole, locking the lid to the frame, and turning the locking piece with a key, the cylinder lock is removed from the bar insertion hole, and the receiving piece of the lock member is exposed in the burr insertion hole. An underground structure lid locking device, wherein the receiving piece is operated by a bar to release the engagement between the inclined piece and the lock member to unlock the lid.

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