JPH0245309Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] Industrial application field...The invention is applicable to telephone lines, electric wires,
This invention relates to the improvement of manhole covers for tunnels in which gas pipes, sewage pipes, water pipes, etc. are buried, especially the inner covers.

Conventional technology: Conventional lids of this type, especially the inner lid,
When the lid is closed, it is automatically locked, and the only way to unlock it is to unlock it from inside.Therefore, there is a risk of a fire breaking out in the tunnel or flooding due to high tides, etc. In some cases, when it becomes necessary to open the lid, if it becomes impossible to unlock from the inside, it is impossible to open the lid.

Problems to be solved by the invention: This invention can be locked and unlocked from the outside as well as from the inside, and prevents unauthorized persons from unlocking the door. An object of the present invention is to provide an inexpensive locking device for a lid of an entrance to a tunnel, etc., which can be easily modified using a device for locking and unlocking the lid of an entrance from the inside.

[Structure of idea]

Means for Solving the Problems...In order to achieve the above-mentioned purpose, the present invention has a rotating shaft with a handle, which is provided with a special handle insertion part on the upper part of the lower housing that is attached to the back of the lid so as to protrude. In a lid for an entrance/exit of a cave, etc., which is provided with a locking mechanism for supporting and locking and unlocking the lid in the receiving frame by rotation of the rotating shaft, the lid is provided integrally with the lower housing and is attached on the surface of the lid. a protruding upper housing;
A slit is formed hanging downward from the upper end surface of the housing, and a key rotation part is formed in the slit, and a cylindrical cylinder mounting body is fitted and supported within the upper housing, and the longitudinal axis of the mounting body is A cylinder lock is installed in a direction perpendicular to the cylinder lock, with its key insertion opening facing the key rotation part of the slit, and a latch engagement groove is provided on the inner surface of the upper housing facing the latch of the cylinder lock. This device is characterized by a locking device for the lid of an entrance to a cave or the like.

Embodiment: The embodiment shown in the drawings is an inner cover for an entrance/exit cover device for a tunnel, etc., in which a top cover A is placed on a manhole and an inner cover B is placed below it, as shown in Fig. 9. This shows an embodiment in which B is provided with a locking device.

A housing attachment hole 11 is provided approximately at the center of the inner lid B, penetrating the front and back sides. A disk-shaped horizontal flange 12a is attached to the upper edge of the lower housing 12, which has a substantially cylindrical shape.
will be established. Further, the upper housing 1 has a substantially cylindrical shape.
3, a disk-shaped horizontal flange 13a is provided at the lower edge. The horizontal flanges 12a and 13a of the upper and lower housings 12 and 13 are overlapped and fixed together with assembly bolts 26a. Insert the upper housing 13 of the housing integrally fixed as described above into the housing mounting hole 11 from the back side of the inner cover B, and attach it to the inner cover B from the flange 12a side with the upper housing 13 protruding upward from the surface of the inner cover B. Screw in the bolt 26b to fix the upper and lower housings 13, 12 to the inner lid B.

A rotating shaft 20 is inserted and supported within the lower housing 12. That is, a large-diameter disk portion 20a having a larger diameter than the shaft 20 is formed above the rotating shaft 20, and is rotated between the recessed portion 12b provided on the upper surface of the lower housing 12 and the flange 13a of the upper housing 13. Fits freely. Further, a dedicated handle insertion part 20b is formed on the large diameter disc part 20a and projects into the upper housing 13. The lower end of the rotating shaft 20 protrudes below the lower end surface 12c of the lower housing 12, and an opening/closing operation part 21, for example, a handle 21, is provided at the protruding end.
Install. A crank arm 22 is made to protrude radially in three directions from the projection 20c, and the rear end of a cannula bar 24 is rotated laterally at the tip of a connecting rod 23 which is pivotally connected to the tip of the crank arm 22 so as to be able to rotate laterally. Pivot as possible. Kannuki stick 24 is the inner lid B
Cannuki stick support arm 41 hanging down on the back side of the
42 so as to be slidable laterally in the insertion holes 41a and 41b, and the distal end side 24a of the cannula bar 24 is configured to be able to be engaged with a receiving frame 50 on which the inner lid B is placed and supported. The crank arm 22 and the connecting rod 2
3, Kannuki stick 24, Kannuki stick support arm 4
1, 42, and the receiving frame 50 constitute a cannula mechanism. Reference numeral 40 denotes a cap to which cannula stick support arms 41 and 42 are attached, and is located above a support arm insertion hole 43 provided in the inner cover B, and is fixed from the back side of the inner cover B with a bolt 44. 25 is a bush, and c is a handle for opening outward.

The upper housing 13 is provided with a slit 14 depending downwardly from its upper end surface 13b. The width of the slit is formed to be wide enough to allow the wall thickness of the key 60 of the cylinder lock 31, which will be described later, to be slidable.
The slit 14 is provided with a key rotation part 15 in which the key 60 can be rotated. A cylindrical lock mounting body 30 is fitted and supported within the upper housing 13 and above the dedicated handle insertion portion 20b. Reference numeral 16 denotes a support step provided on the inner circumferential wall of the upper housing 13;
7 is an o-ring. The above cylinder key mount 3
0, a cylinder lock 31 is embedded and installed in a direction perpendicular to the longitudinal axis x-x', so that the key insertion opening 32 of the cylinder lock 31 faces in the direction of the key rotation part 15 of the slit 14. A latch engagement groove 34 is provided surrounding the inner wall of the upper housing facing the latch 33 of the cylinder lock 31. still,
The opening/closing operation part 21 may be formed as a box spanner fitting locking part instead of a handle.

Operation: The case of unlocking and locking from the outside (road side) will be explained as follows.

(When unlocking) Remove the top cover A, insert the key 60 into the key insertion slot 32 of the cylinder lock 60 from the key rotation part 15 on the side surface of the upper housing 13 protruding from the surface of the inner cover B, and turn it in the unlocking direction. By moving the latch 33, the latch 33 is disengaged from the latch engagement groove 34 and pulled into the cylinder lock 31. When the key 60 is lifted upward between the slits 14, the cylinder lock mounting body 30 is also lifted upward. When removed from the housing 13, a dedicated handle insertion portion 20b appears within the upper housing 13. Next, insert a special handle (not shown) into the special handle insertion part 20b,
When rotating in the unlocking direction, the rotating shaft 20 also rotates in the unlocking direction, and the cannula bar 24, which is supported by the cannula bar support arms 41 and 42 in conjunction with the crank arm 22 and the connecting rod 23, remains in the supported state. The bar 24 is moved backward in the direction of being detached from the bar support arms 41 and 42, and therefore the tip of the bar 24 is disengaged from the receiving frame 50. That is, the locking mechanism is opened and the inner lid B can be removed from the receiving frame 50.

(When closing the lock) When rotating the dedicated handle (not shown) inserted into the dedicated handle insertion part 20b in the locking direction, the rotation shaft 20 also rotates in the locking direction, and the crank arm 2
2. The cannula bar 24 is linked to the connecting rod 23 and supported by cannula bar support arms 41 and 42,
Move forward in the supported state and touch the tip 2 of the bar 24.
4a is engaged with the receiving frame 50. That is, the locking mechanism is locked and the inner lid B cannot be removed from the receiving frame 50. Next, the cylinder lock mounting body 30 is fitted into the upper housing 13 with its key insertion opening 32 facing toward the slit 14, and is supported by the support step 16. By inserting the key 60 into the key insertion slot 32 of the cylinder lock 31 from the key rotation part 15 on the side surface of the upper housing 13 and rotating it in the locking direction, the latch 33
is engaged with the latch engagement groove 34, and by removing the key 60, the cylinder lock mounting body 30 cannot be removed from the upper cylinder 13. In this way, the inner lid B is locked to the receiving frame 50, and the special handle insertion part 20b
is covered and closed by the cylinder lock mounting body 30,
Moreover, the cylinder lock mounting body 30 is attached to the upper cylinder 13.
Since it becomes impossible to remove the inner lid B from the outside, it becomes impossible for an unauthorized person to open the inner lid B from the outside.

Next, when removing the inner cover B from the inside (inside the sinus), when holding the handle 21 and rotating the rotating shaft 20 in the direction of opening, the crank arm 22 and the connecting rod 23 are interlocked and the cannula bar is rotated. Support arm 41,4
The cannula rod 24 supported by the cannula 2 moves backward, and the tip of the cannibal rod 24 is disengaged from the receiving frame 50. That is, the locking mechanism is opened, and the inner lid B is detached from the receiving frame 50 while the cylinder lock mounting body 30 is fitted and supported within the upper housing 13 and the latch 33 is locked in the latch engagement groove 34. be able to.

By forming the special handle (not shown) in the shape of a box spanner and making some modifications to the shape of the fitting part, a more secure locking system can be obtained. In addition, several types of cylinder lock mounts 30 are prepared in which cylinder locks 31 are mounted on the cylinder lock mounts 30, and different types of key insertion slots 32 and matching keys 60 are attached to the cylinder locks 31, A more secure lock system can be obtained by replacing the locks as needed.

〔effect〕

As described above, the present invention is capable of locking and unlocking from the outside as well as from the inside, prevents unlocking by unauthorized persons, and further improves the conventional cover for entrances and exits of caves, etc. This has the effect of providing an inexpensive locking device for the entrance/exit cover of a tunnel, etc., which can be easily modified using a device for locking and unlocking from the inside.

[Brief explanation of drawings]

The drawings illustrate embodiments of the invention,
Fig. 1 is a longitudinal sectional view of a part of the lid of the present invention, Fig. 2 is a plan view of the upper housing, Fig. 3 is a longitudinal sectional view of the upper housing and the lower housing, and Fig. 4 is a longitudinal sectional view of the upper housing and the lower housing. Right side view, 5th
Figure 6 is a perspective view of the bottom of the lid showing the cannula mechanism, Figure 6 is a partially cutaway perspective view of the upper housing, Figure 7 is a perspective view of the cylinder mounting body, Figure 8 is a perspective view of the upper housing, and Figure 8 is a perspective view of the upper housing. FIG. 9 is a longitudinal cross-sectional view showing the relationship between the upper cover and the inner cover, and FIG. 10 is a longitudinal cross-sectional view of the inner cover immediately before the locking mechanism of the inner cover is unlocked. A...Top lid, B...Inner lid, C...Outward opening handle, 11...Housing mounting hole, 12...Lower housing, 12a...Horizontal flange, 12b...
Recessed portion, 12c...Lower end surface, 13...Upper housing, 13a...Horizontal flange, 13b...Upper end surface, 14...Slit, 15...Key rotating portion, 16
. . . Support step portion, 17 . ...Crank arm, 23...Connection rod, 24...Cannula bar, 24a...Tip side, 2
5... Button, 26a... Assembly bolt, 26b
...Mounting bolt, 30...Cylinder lock mounting body,
31...Cylinder lock, 32...Key slot, 33
... Latch, 34 ... Latch engagement groove, 40 ... Cap, 41, 42 ... Cannula bar support arm,
41a, 41b...Insertion hole, 43...Support arm insertion hole, 44...Bolt, 50...Reception frame, 60...
…key.

Claims (1)

[Scope of utility model registration request] A rotating shaft with an opening/closing operation part with a dedicated handle insertion part on the top is supported in the lower housing protruding from the back of the lid, and the lid is locked and unlocked from the receiving frame by rotation of the rotating shaft. In a lid for an entrance/exit of a cave, etc., which is equipped with a cannula mechanism for the purpose of opening, an upper housing is provided integrally with the lower housing and protrudes above the surface of the lid, and a slit is provided that hangs downward from the upper end surface of the housing. and a key rotation part is formed in the slit, a cylindrical cylinder mounting body is fitted and supported in the upper housing, a cylinder lock is mounted in a direction perpendicular to the longitudinal axis of the mounting body, and the key Locking the lid of an entrance/exit of a cave, etc., characterized in that the insertion port faces the direction of the key rotation part of the slit, and a latch engagement groove is provided on the inner surface of the upper housing facing the latch of the cylinder lock. Device.