JP2004190261A - Locking device of lid member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking device which can be manufactured at lower cost and is easier to get inventory control than in case that a device body is manufactured and controlled by separately producing the socket fitting parts forming a device body and a socket removably fitted to the socket fitting parts so that only the socket corresponding to a plurality of kinds of safety lock is manufactured. <P>SOLUTION: A locking hook is provided in a positional changeable manner so as to change between the locking position where the locking hook is fixed to the frame holder to regulate opening of the lid member and the unlocking position where the locking hook is released from the frame holder to allow the lid member to open. The unlocking hook can be operated by the rotation of an opening/closing operation tool inserted in the device body. In the lid member, a safety lock is detachably provided to prevent insertion of the operation tool. The device body is provided with the socket fitting parts and the socket removably fitted to the socket fitting parts. The safety lock is attached to the socket. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a locking device for a lid, and more particularly, to a locking device for an iron lid for an underground structure requiring a security function by locking, for example, a lid for a common groove for electric wires.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, a manhole for inspection work is provided at an appropriate interval in an underground common groove for burying a gas pipe, a water pipe, a telephone cable, and the like, and the manhole has an opening portion. A lid for inspection work for closing the door is attached. And, in order to prevent mischief, theft, vandalism, etc. on the gas pipes and the like installed in the common groove, a locking device is generally attached to the lid so that the lid cannot be opened. .
[0003]
Such a locking device includes a device main body fixed to a lid that opens and closes an opening formed in a receiving frame, and a locking device that controls the opening of the lid by engaging the receiving frame with the device main body. And a locking hook provided so as to be freely changeable between a position and an unlocking position allowing the lid to be released from engagement with the receiving frame.
[0004]
When the locking device is locked or unlocked, the locking jig is inserted between the locking and unlocking positions by inserting the opening / closing jig into the device body and rotating the opening / closing jig. It can be changed.
Further, for the purpose of ensuring safety, a safety lock (cylinder lock) is provided on the apparatus main body so that the opening / closing jig is inserted into the apparatus main body and the locking hook cannot be operated.
[0005]
[Patent Document 1]
Japanese Utility Model Registration No. 3071918 [0006]
[Problems to be solved by the invention]
Since there are a plurality of types of cylinder locks having different shapes and sizes corresponding to each user specification, it is necessary to manufacture an apparatus main body corresponding to each cylinder lock. Had to be managed.
[0007]
In addition, the work of inspecting various cables and the like from the opening of the receiving frame by lifting the lid at the site is performed.In such work, the cylinder lock is taken out from the apparatus main body and the opening / closing for the opening / closing is performed from above. The jig is inserted. That is, since the cylinder lock is removed every time a large number of opening / closing lids are inspected, it is preferable that the cylinder lock can be quickly removed.
[0008]
For example, if the mounting portion of the cylinder lock is corroded by rainwater or the like, it becomes difficult to remove the cylinder lock, which has been one of the causes of lowering the inspection work efficiency. Note that the cylinder lock is usually housed in a stainless steel casing, so there is no possibility of rust. Therefore, it is conceivable to manufacture the apparatus main body from a material having high corrosion resistance. However, manufacturing the apparatus main body from a material having high corrosion resistance has a disadvantage in that the cost of the product increases.
[0009]
A first object of the present invention is to manufacture a socket corresponding to a plurality of types of safety locks by separately manufacturing a socket mounting part constituting a device main body and a socket detachably mounted on the socket mounting part. It is an object of the present invention to make the manufacturing cost and the inventory pipe easier as compared with the case where the apparatus body is manufactured and managed by merely manufacturing the apparatus.
[0010]
A second object is to enable easy and quick inspection work of various cables and the like on site.
[0011]
[Means for Solving the Problems]
The present invention has been made in order to solve the above-mentioned problem, and the feature thereof is that an apparatus main body fixed to a lid body that opens and closes an opening formed on a receiving frame side so that it can be opened and closed, and a locking hook is provided on the receiving frame. It is provided so as to be freely changeable between a locked position for restricting the lid from being opened by being engaged and an unlocking position for permitting the lid to be released from being engaged from the receiving frame and inserted into the apparatus body. The locking hook is operable by the rotation of the opening / closing operation jig, and a safety lock is provided on the apparatus main body so as to be detachably provided with a safety lock for preventing insertion of the opening / closing operation jig. , The apparatus body includes a socket mounting component and a socket detachably mounted on the socket mounting component, and the safety lock is mounted on the socket.
[0012]
The apparatus main body includes a socket mounting part and a socket detachably mounted on the socket mounting part. Since the safety lock is mounted on the socket, it is only necessary to manufacture a plurality of types of sockets. In addition, it is not necessary to manufacture the entire apparatus main body of different types, so that the manufacturing cost is reduced and the space for stock is reduced, so that inventory management becomes easy.
[0013]
Moreover, the socket is preferably made of a material that is less susceptible to corrosion than the socket mounting part. In such a case, for example, the socket is hardly rusted by rainwater or the like for a long time, and the safety lock is rusted on the socket. The safety lock can be easily and quickly removed, and the inspection work efficiency can be improved.
[0014]
Further, in the device body fixed to the lid body that opens and closes the opening formed on the receiving frame side so that the lid can be opened and closed, the locking hook engages with the receiving frame and regulates the opening of the lid body from the locking position and the receiving frame. The locking hook is operable by rotation of an opening / closing operation jig inserted into the apparatus main body, the position being freely changeable to an unlocking position allowing the lid to be released by disengagement, and configured to be operable. In addition, in the locking device for a lid body in which a safety lock is removably provided to prevent the opening and closing operation jig from being inserted into the device main body, the device main body includes a socket mounting part and a socket mounting part. A socket mounted so as to be rotatable, and a lock attachment part for rotatably holding the locking hook, wherein the socket attachment part is attached to an upper surface side of a lid, and the lock attachment part is a lid Detachable on the bottom side of the Ri attached, socket said safety lock is mounted is that formed by the structure can be attached to and detached from the lower surface side of the lid to the socket fitting.
[0015]
The socket to which the safety lock is attached is configured to be attachable to and detachable from the socket mounting part from the lower surface side of the lid. Therefore, even when the socket mounting part is fixed to the lid, maintenance and replacement of the socket are performed. Work can be done easily and quickly.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 10 show a locking device A according to an embodiment of the present invention. As shown in FIGS. 1 to 3, the present locking device A is a single or plural lids that open and close the ground surface opening of the common electric wire groove, have a square planar shape, and use a block installed on the upper surface. The present embodiment is applied to an iron lid 1 and a receiving frame 2 which forms an inner peripheral portion of the ground surface opening 2b and supports the iron lid in a closed state. The locking device A includes an upper unit B and a lower unit C.
[0017]
As shown in FIG. 4, the lower unit C mainly includes a locking hook 5, a locking rotating plate 6 as an operating body, a compression spring 7, a locking mounting part 8, and an adjusting screw 10. As shown in FIG. 5B, the locking hook 5 has a cylindrical body 12 having a flange 11 at its lower end, a protrusion 13 for locking engagement and forming a first rotation restricting portion, and a second rotation restriction. And a projecting portion 15 for forming a portion. An engaging portion 16 is formed on the upper surface of the main body portion 12 and includes a rectangular concave portion in a plan view. The locking rotary plate 6 is fitted to the engaging portion 16 so as to be relatively non-rotatable and detachable. A male screw 19 is formed on the upper part of the main body 12.
[0018]
The locking rotating plate 6 is made of a substantially rectangular metal plate as shown in FIG. 5 (a), and has a non-circular (for example, rectangular) operation opening as an engaged portion at the center thereof. 18 are formed. The thickness of the locking rotating plate 6 is set substantially equal to the depth of the engaging portion 16.
[0019]
The compression spring 7 is externally fitted to the main body 12 so as to contact the flange 11 from above. The lock mounting component 8 has a rectangular shape in a plan view, and has an insertion hole 20a through which the main body 12 is inserted. Then, the adjusting screw 10 is screwed into the male screw portion 19 of the main body 12 from above the lock mounting component 8 so that the compression spring 7 is compressed and held by the flange portion 11 of the main body 12 and the locking mounting component 8. ing. Here, the locking hook 5 is rotatable in a state where a predetermined frictional resistance is applied to the locking attachment component 8.
[0020]
A plurality of mounting holes 20 are formed in the locking mounting component 8, and the locking mounting component 8 is mounted on the lower surface (back surface) of the iron cover 1 by bolts 17 and nuts 17 a inserted into the mounting holes 20. As shown in FIG. 1, the protrusion 13 for locking and forming the first rotation restricting portion is a protrusion amount that engages with the inner edge 2a of the receiving frame 2 from below at a predetermined locking position. In addition, the locking position of the locking hook 5 can be determined by the contact of the projection 15 for forming the second rotation restricting portion with the stopper 8a. As shown by the imaginary line in FIG. 3B, one side surface 13a of the protruding portion 13 abuts on a stopper portion 8a protruding downward from the lock mounting component 8, thereby positioning the locking hook 5 at the unlocking position. can do.
[0021]
The upper unit B is provided with an upper main body 22 and a socket 23 as socket mounting parts as shown in FIGS. 6, 7, 8A and 9. The upper main body 22 is made of, for example, ductile cast iron, has a rectangular shape in plan view, and has a flange portion 25 on three pieces at its lower end. A mounting hole 26 is provided in the flange 25 at a position corresponding to the mounting hole 20 of the locking mounting component 8. The upper body 22 is attached to the upper surface (front surface) of the iron cover 1 by the bolts 17 and the nuts 17a. The upper main body 22 is provided with a storage portion 27 into which the socket 23 is inserted from below. The storage portion 27 includes a circular insertion hole 28 and a holding recess 30 provided below the insertion hole 28. The holding recess 30 has a larger diameter than the insertion hole 28 and is formed in a rectangular shape.
[0022]
The socket 23 is made of, for example, a rust-resistant material such as stainless steel. As shown in FIGS. 6, 7 and 9 (b), the socket 23 has a cylindrical portion 31 inserted into the insertion hole 28 and a holding recess 30. And a rectangular mounting portion 32 to be fitted. The mounting portion 32 is detachably fixed to the upper main body 22 by a bolt 33 as a fixing tool. A female screw portion 3 is formed on the inner periphery of the cylindrical portion 31, and a cylinder lock 35 is screwed into the female screw portion 3 as shown in FIG. Further, as shown in FIG. 1, the iron cover 1 has an opening 1 a larger than the mounting portion 32.
[0023]
As shown in FIG. 7, the cylinder lock 35 has a substantially cylindrical outer shape. On the upper surface, a locking flange 35a having a diameter slightly larger than the inner diameter of the female screw portion 31a is provided. Is provided with a locking piece 35b so as to be rotatable. Therefore, by inserting and rotating a key into a key hole (not shown), the locking piece 35b is rotated to release the engagement with the upper body 22 so that the cylinder lock 35 can be inserted and removed. Has become.
[0024]
Reference numeral 37 denotes a cap made of a magnetically attachable member that is detachably fitted into a fitting recess 23a formed on the upper surface of the socket 23. Incidentally, the apparatus main body is constituted by the locking rotating plate 6, the compression spring 7, the locking attachment part 8, and the adjusting screw 10 of the upper unit and the lower unit C.
[0025]
In the locking device for an iron lid having the above configuration, the state of the locking hook indicated by a solid line in FIGS. 1 and 3B is a locked state, and the state of the locking hook indicated by a virtual line in FIG. It is in a locked state. Normally, the locking hook 5 is in a locked state. Then, in order to open the iron cover 1, the cap 37 is removed by being attracted by a magnet part of an opening / closing jig (not shown). Next, by rotating the key inserted into the cylinder lock 35 mounted on the socket 23, the locking piece 35b is rotated to release the engagement state with the socket 23, and the cylinder lock 35 is taken out.
[0026]
Next, as shown in FIG. 10, a fitting portion 40 having a predetermined shape provided on one end side of the opening / closing jig 38 is inserted into the socket 23, and is relatively rotated with respect to the engaging portion 16 of the main body portion 12 of the lower unit. It is fitted into the operation opening 18 of the locking rotating plate 6 which is fitted in impossible. Then, when the opening / closing jig 38 is rotated in a predetermined direction, the locking hook 5 is rotated by about 90 degrees from the locked position to the unlocked position to be in the unlocked state.
[0027]
After the locking hook 5 is released, the opening / closing jig 38 is pulled out, a male screw portion of a support portion such as an eyebolt is screwed into the female screw portion 31a of the socket 23, and a hook is attached to a retaining ring provided on an upper portion of the support portion. To lift the iron lid 1.
[0028]
Further, in order to shift from the unlocked state in which the iron cover 1 is merely placed on the receiving frame 2 to the locked state, the opening / closing jig in which the fitting portion 40 is engaged with the opening 18 of the locking rotating plate 6 in the opposite direction. When the tool is rotated, the locking hook 5 rotates about 90 degrees in the opposite direction to the above, and the locked state is established. Then, the cylinder lock 35 is screwed into the socket 23 again, and the cap 35 is fitted and mounted on the cylinder lock 35.
[0029]
In the present embodiment, since the locking rotation plate 6 that is rotated by the opening / closing jig is provided separately from the locking hook 5, the operation opening 18 shown in FIGS. Any shape can be adopted. Therefore, it is possible to correspond to an arbitrary type of opening / closing jig for each administrator simply by replacing the predetermined locking rotating plate 6.
[0030]
Further, in the present embodiment, the main components of the upper member 12 and the lower unit except for the socket 23 can be made of ductile cast iron, so that they are robust, have excellent durability, and are inexpensive. On the other hand, since the socket 23 is made of a rust-resistant material such as stainless steel, rust does not occur on the female screw portion 31a of the socket 23. Even if the cylinder lock 35 is attached to the socket 23 for a long time, It is possible to prevent the cylinder lock 35 from coming off due to rust on the socket 23 side.
[0031]
Further, the locking device A of the present embodiment includes an upper unit B and a lower unit C, and each unit is detachably attached to the iron lid 1. Therefore, after the installation of the locking device, replacement and maintenance of the locking device can be performed easily and quickly. Specifically, with the iron lid 1 opened, the nut 17a for fixing the upper unit B and the lower unit C is loosened, removed from the bolt 17, and the lower unit C is removed from the bolt 17. Further, by loosening the bolt 33, the socket 23 in which the cylinder lock 35 and the cap 37 are integrated can be removed from the back side of the iron lid 1 through the opening 1a of the iron lid 1.
[0032]
By the opposite operation, the socket 23 and the like can be attached to the iron cover 1 from the back surface side, and the socket 23 and the like can be removed from the iron cover 1 and replaced, and the operations such as maintenance and replacement of parts can be easily performed. . In addition, since the socket 23 and the like can be removed from the back side of the iron cover 1 in a state where the upper body 22 is fixed to the iron cover 1, the upper body 2 cannot be removed from the iron cover 1 by concrete so that safety is improved. Can be maintained.
[0033]
The apparatus main body does not necessarily need to be formed of an upper and lower unit separate from the lid. For example, the upper member of the upper unit may be formed integrally with the lid.
[0034]
【The invention's effect】
The device main body of the present invention includes a socket mounting component and a socket detachably mounted on the socket mounting component, and the safety lock is mounted on the socket, so that only a plurality of types of sockets need to be manufactured. It is not necessary to manufacture the entire apparatus main body of a different kind, so that the manufacturing cost is reduced, the space for stock is reduced, and inventory management becomes easy.
[0035]
The socket is preferably made of a material that is less likely to corrode than the socket mounting part.In such a case, for example, the socket becomes less likely to rust due to rainwater or the like, and the safety lock becomes more difficult to remove due to the rusting of the socket. Can be prevented, the work of removing the cylinder lock can be performed easily and quickly, and the inspection work efficiency can be improved.
[0036]
Further, since the socket to which the safety lock is attached is configured to be detachable from the socket mounting part from the lower surface side of the lid, even when the socket mounting part is fixed to the lid, maintenance and replacement of the socket are performed. Work can be done easily and quickly.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part showing an embodiment of the present invention.
FIG. 2 is a front view including a partial cross section in which a locking device is attached to the lid.
FIGS. 3A and 3B show a state in which a locking device is attached to the lid, wherein FIG. 3A is a plan view and FIG.
FIG. 4 is an exploded sectional view of a lower unit.
FIG. 5A is a plan view showing an operating body, and FIG. 5B is a plan view of a locking hook.
FIG. 6 is an exploded sectional view of the upper main body and the socket.
FIG. 7 is a sectional view in which a cylinder lock and a cap are removed from an upper unit.
8A is a cross-sectional view showing an upper unit, and FIG. 8B is a cross-sectional view showing a lower unit.
9A and 9B show an upper unit, wherein FIG. 9A is a plan view and FIG. 9B is a bottom view.
FIG. 10 is a sectional view showing a state in which a locking hook is rotated by an opening / closing jig.
FIGS. 11A to 11G are plan views each showing an operating body. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Iron lid (lid), 2 ... Receiving frame, 2b ... Opening, 5 ... Locking hook, 8 ... Locking attachment part, 22 ... Upper body (socket attachment part), 23 ... Socket, 35 ... Cylinder lock (safety lock) ), A: Locking device

Claims (4)

A locking body engages with the receiving frame to lock the opening formed on the receiving frame side so that it can be opened and closed. The opening and closing operation jig inserted into the apparatus main body is configured to be capable of operating the locking hook by freely changing the position of the opening and closing operation jig inserted into the apparatus main body. In the device body, in a locking device for a lid body provided with a detachable safety lock to prevent insertion of the opening and closing operation jig,
The device locking device according to claim 1, wherein the device main body includes a socket mounting part and a socket detachably mounted on the socket mounting part, and the safety lock is mounted on the socket. 2. The lid locking device according to claim 1, wherein the socket is made of a material that is less likely to corrode than the socket mounting part. The locking device for a lid according to claim 2, wherein the socket mounting component is made of iron such as ductile cast iron, and the socket is made of stainless steel. A locking body engages with the receiving frame to lock the opening formed on the receiving frame side so that it can be opened and closed. The opening and closing operation jig inserted into the apparatus main body is configured to be capable of operating the locking hook by freely changing the position of the opening and closing operation jig inserted into the apparatus main body. In the device body, in a locking device for a lid body provided with a detachable safety lock to prevent insertion of the opening and closing operation jig,
The device main body includes a socket mounting component, a socket detachably mounted on the socket mounting component, and a lock mounting component for rotatably holding the locking hook, wherein the socket mounting component includes a lid. The lock mounting part is mounted on the upper surface side, and the lock mounting part is detachably mounted on the lower surface side of the lid, and the socket to which the safety lock is mounted is configured to be detachable from the socket mounting part from the lower surface side of the lid. A locking device for a lid, comprising:

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