JP4195636B2 - Lid lock device for underground structures - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lid locking device that can withstand destructive activities on underground structures that confiscate communication cables and the like.
[0002]
[Prior art]
The lid of underground structures laying communication cables, etc. is expected to have a significant impact if destroyed, so from the viewpoint of preventing destructive activities, locks used for sewer iron covers, etc. Cylinder locks that are more effective in preventing illegal unlocking than devices are used. JP-A-11-107304, JP-A-2001-140520, etc. disclose examples of locking devices using cylinder locks.
[0003]
However, these locking devices have the following problems.
a) Since the cylinder lock has a precisely made internal mechanism, in the case of manhole covers installed on the road, they are covered with earth and sand and affected by calcium chloride sprayed during freezing, resulting in malfunction. Easy to wake up.
b) The conventional locking device is provided with a cylinder lock so that the locking device provided on the lid main body is not operated. When operating the locking device, it is necessary to remove the cylinder lock itself, which is troublesome and fouling. There was a risk of loss.
c) Also, in the two-stage locking device of b), the overall height of the device structure must be large, so that it will not come out of the frame unless it is lifted excessively to open the lid after unlocking, and workability Is not good. In addition, there is a problem that the locking device is likely to hit the lid receiving frame and is highly likely to be damaged.
[0004]
[Problems to be solved by the invention]
The present invention has been made paying attention to the above points, and the problem is that it can withstand destructive activities as a locking device for a cover for an underground structure installed on a road, and can be affected by the external environment. It is to prevent malfunction and to exhibit excellent durability. Another object of the present invention is to allow double illegal intrusion prevention measures to be taken by using an obturator that protects against the influence of the external environment.
[0005]
[Means for Solving the Problems]
  In order to solve the above problems, the present inventionA lid locking device that can withstand destructive activities against underground structures that confiscate communication cables,A sliding tumbler lock having a sliding tumbler lock that has a reciprocating cannula, and locks the cannula by engaging with an engagement part on the lid receiving frame side and unlocks it by releasing it from the engagement. In order to protect the sliding tumbler lock from the external environment, the keyhole is disposed on the back of the lid facing the unlocking opening provided on the surface of the lid.The
Sliding tumbler tablets are reciprocated and locked or unlocked,
A cam receiving member (large tilt) fixed to the kanuki and having a cam receiving portion and cam relief portions on both sides of the cam receiving portion;
A stick fixed to the cam receiving member;
A cam (locking plate) that is rotated by a key, the tip passes through the cam relief portion of the cam receiving member at the beginning and the end of rotation, and the tip presses the cam receiving portion of the cam receiving member at the middle of rotation;
A plurality of tumbler plates that are supported so as to be movable in a direction crossing the direction of movement of the kanuki, and have a pair of tuck holes arranged in the direction of movement of the kanuki, a gate hole that communicates with the tuck holes, and a space into which a key is inserted. A tumbler tablet with
The above void has an abdomen with the central part cut into an arc,
At the initial stage of rotation of the key inserted in the void, the inner edge of the void is pressed against the key's dent, and the tumbler plate moves against the urging force, and the crater moves the tumbler plate in the middle of rotation. Without rotation, and at the end of rotation, the scratches are separated from the inner edge of the void, and the tumbler plate is returned to its original position by the urging force.
The position of the gate hole varies depending on each of the plurality of tumbler plates,
When the tumbler plate moves at the initial stage of the rotation of the key, all the positions coincide with the position of the tack.
Each of the tumbler plates is held with a gap between each other.
ShallThis is a measure taken.
[0006]
Therefore, in the present invention, a sliding tumbler lock is applied as the locking means, and locking and unlocking are performed by reciprocating movement of the kanuki. That is, the cannula is engaged with the engaging part on the lid receiving frame side to be locked (forward movement), and released from the engagement to be unlocked (reverse movement). It is desirable that the kanuki has a strength that does not come off or bend even when an external force is applied to the lid in the locked state.
[0007]
As sliding tumbler tablets for this purpose, Kanuki which reciprocates and locks or unlocks,
A cam receiving member (large tilt) fixed to the cannula and having a cam receiving portion and cam relief portions on both sides of the cam receiving portion;
A stick fixed to the cam receiving member;
A cam (locking plate) that is rotated by a key, the tip passes through the cam relief portion of the cam receiving member at the beginning and the end of rotation, and the tip presses the cam receiving portion of the cam receiving member at the middle of rotation;
A plurality of tumbler plates that are supported so as to be movable in a direction crossing the direction of movement of the kanuki, and have a pair of tuck holes arranged in the direction of movement of the kanuki, a gate hole that communicates with the tuck holes, and a space into which a key is inserted. A tumbler tablet with
The above void has an abdomen with the central part cut into an arc,
At the initial stage of rotation of the key inserted in the void, the inner edge of the void is pressed against the key's dent, and the tumbler plate moves against the urging force, and the crater moves the tumbler plate in the middle of rotation. Without rotation, and at the end of rotation, the scratches are separated from the inner edge of the void, and the tumbler plate is returned to its original position by the urging force.
The position of the gate hole varies depending on each of the plurality of tumbler plates,
When the tumbler plate moves at the initial stage of the rotation of the key, all the positions coincide with the position of the tack.
Each of the tumbler plates is held with a gap between each other,
It is most desirable to apply.
[0008]
In the tumbler lock having the above-described configuration, each tumbler plate is held with a gap between each other. Therefore, the operation of the tumbler plate is smoother and more reliable and less prone to failure than when the tumbler plates are in surface contact with each other. Further, since there is a gap between the tumbler plates, a coil spring with a spring core can be used as the tumbler spring, and there is less risk of interference between the springs compared to the plate spring, and the design is easy.
[0009]
The key can be configured to be inserted / removed at two rotational positions corresponding to the moving direction of the kanuki. Since it is constituted in this way, it can be checked at a glance whether the tumbler lock is in the locked state or the unlocked state by looking at the keyhole after the key is removed.
[0010]
Further, at the end of rotation, the key can be provided with a forcibly lowered tumbler that moves in the direction of the urging force by the key's knurling and presses the plurality of tumbler plates in the above direction. Therefore, even when the urging force acting on each tumbler plate is insufficient for some reason, each tumbler plate can be reliably returned to the normal position after locking or unlocking.
[0011]
Then, in order to protect the tumbler lock from the external environment, the unlocking port on the surface of the lid is closed by the closing body. This closing body is screwed into a screw portion provided around the keyhole on the sliding tumbler lock side, and has a mating engagement portion that can engage only with an engagement portion of a dedicated tool on the outer peripheral portion. For this reason, since a closing body cannot be removed without a dedicated tool, a double illegal intrusion prevention effect is expected.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the lid locking device 10 for an underground structure according to the present invention will be described in more detail with reference to the illustrated embodiment. In FIG. 1, 11 is a lid receiving frame that forms an opening of an underground structure, and 12 is a lid that closes the opening. As shown in FIG. 3, the lid 12 is hingedly connected to a hinge receiver 13 of a lid receiving frame 11 by a hinge pin 14, and a lid locking device 10 according to the present invention is provided at a position 180 degrees opposite to this. It has been.
[0013]
In order to provide the present apparatus 10, the lid 12 is provided with a mounting base 15 protruding in a trapezoidal shape on the back surface of the lid, and a concave portion 16 corresponding to the base 15 is unlocked on the surface of the lid. It is provided as a mouth. The sliding tumbler lock 20 which is a locking means of the device 10 is disposed on the mounting base 15 so that the portion having the keyhole is disposed in the concave portion 16, and is covered by the mounting tool 17 indicated by a bolt. Attached to the body 12. The sliding tumbler lock 20 has a cannula 21 that can reciprocate as will be described later, and this cannula 21 is engaged with the engaging portion 18 on the lid receiving frame side and locked (FIG. 4A). It can be released from the engagement and unlocked (see FIG. 4B)). The kanuki 21 has a strength that can withstand an external force that is illegally applied to the lid 12.
[0014]
The above-described sliding tumbler lock has a main portion housed in a container composed of an inner case 23 and a cover 24 fixed to the outer case 22 having a U-shaped cross section by a rivet 22a. A cam receiving member (large tilt) 26 and a hook 27 are integrally provided on the cannula 21 (see FIGS. 5 and 6). The cam receiving member 26 is attached to the front surface of the kanuki 21 by a screw 28 (see FIG. 6). A lower portion of the cam receiving member 26 is deeply cut upward to form a cam receiving portion 26a, and a lower end of the cut portion is opened in an eight shape to form a cam relief portion 26b. See FIG.
[0015]
A pipe 29 extending forward through the outer case 22 and a door body (not shown) is fixed to the outer surface of the inner case 23. A front sleeve 30 is rotatably arranged inside the pipe 29, and a rear end of the rear sleeve 31 having a front end fitted to the rear end of the front sleeve 30 is rotatably supported by a cover 24 (see FIG. 5). A male thread 29a is machined on the outer periphery of the front end of the pipe 29.
[0016]
The parallel notch 30a at the rear end of the front sleeve 30 and the parallel notch 31a at the front end of the rear sleeve 31 are fitted to each other, and the front sleeve 30 and the rear sleeve 31 rotate integrally. Also, common key holes 30c and 31c are formed in the longitudinal direction of the front sleeve 30 and the rear sleeve 31 (FIGS. 7A and 7B).
[0017]
The rear sleeve 31 is also formed with a parallel notch 31b at the rear, and a cam (locking plate) 32 shown in FIG. 8 is attached to the parallel notch 31b and rotates integrally with the rear sleeve 31. It is supposed to be. A collar 33 is arranged to prevent the cam 32 from moving backward (downward in FIG. 5). A cam stopper 34 is provided to limit the rotation of the cam 32. As a result, not only the cam 32 but also the front sleeve 30 and the rear sleeve 31 are limited to a rotation angle range of 180 °.
[0018]
FIG. 9 shows the shape of the tumbler plate 35. In the lower part of the tumbler plate 35, a rectangular square hole (vacant space) 35a is formed in which the center of the upper side is cut upward in an arc shape to form an abdomen 35f. In addition, a pair of left and right tuck holes 35b, 35b and a gate hole 35c that communicates the tuck holes 35b with each other are provided at the center. Further, a spring receiving slit 35d into which a later-described tumbler spring 37 and its spring core 38 are inserted, and a pin receiving shoulder 35e with which a later-described forced lowering pin 41 abuts are provided at the upper end. A plurality of tumbler plates 35 (five in the illustrated example) having different height positions H of the gate holes 35c are prepared.
[0019]
FIG. 10 shows the tumbler holding pin 36. On the side surface of the tumbler holding pin 36, a plurality of circumferential grooves 36a having a width corresponding to the thickness of the tumbler plate or the like (six in the illustrated example) are provided. A female screw hole 36b is provided in the head.
[0020]
The tip portion of the tumbler holding pin 36 (the right end in FIG. 10A) is attached by caulking or screwing to a total of four locations on the left and right ends of the inner case 23. The left and right edges of the plurality of tumbler plates 35 are inserted into the circumferential grooves 36a of the tumbler holding pins 36, and are held slidable in the vertical direction while maintaining a gap therebetween (see FIG. 5). Further, the lower part of the spring core 38, the tip of which is inserted into a small hole provided in the side wall portion of the inner case 23, is inserted into the spring receiving slit 35d of the tumbler plate 35, and a coil spring 37 is fitted and inserted as a tumbler spring. The plate 35 is always urged downward in FIG. Then, the hook 27 of the cam receiving member 26 attached to the cannula 21 is in one of the tuck holes 35d of all the tumbler plates 35, and the cylindrical portion 31d of the cylindrical portion 31 of the rear sleeve 31 is the corner of all the tumbler plates 35. Each is inserted into the hole 35a. The cam stopper 34 is attached to the lower two rear portions (the left portion in FIG. 10A) of the tumbler holding pins 36.
[0021]
FIG. 11 shows a forced lowering tumbler 40. The forcibly lowered tumbler 40 is plate-like and has a thickness equal to that of the tumbler plate 35. The lower half of the tumbler 40 corresponds to the outer diameter of the flange 31e of the rear sleeve 31, and the lower end is arcuate. The upper half is abruptly widened to form a shoulder 40b, and a rear sleeve insertion hole 40a having a large arc shape at the upper end is provided. Further, similarly to the tumbler plate 35, a spring receiving slit 40c into which the tumbler spring 37 and its spring core 38 are inserted is provided at the upper end. Further, a forced lowering pin 41 that abuts on the pin receiving shoulder 35e of the tumbler plate 35 is fixed to the upper right end portion. 40d is a square hole for weight reduction.
[0022]
Similar to the tumbler plate 35, the forcibly lowered tumbler 40 is inserted into the circumferential groove 36a of the tumbler holding pin 36 so that the left and right edges are slidable in the vertical direction while maintaining a gap with the tumbler plate 35. It is held (see FIG. 5). Then, the cylindrical portion 31d of the rear sleeve 31 is inserted into the rear sleeve insertion hole 40a. Similarly to the tumbler plate 35, the tumbler spring 37 and the spring core 38 inserted / inserted into the spring receiving slit 40c are always urged in the acting direction.
[0023]
FIG. 12 shows a key 43 for locking and unlocking the tumbler lock in the device 10 of the present invention. The key 43 has a plate shape and is not provided with a groove or a recess on the side surface. 43a is a rotation axis of the key, 43b is a notch that contacts the upper edge of the square hole 35a corresponding to each tumbler plate 35, and 43c is a notch that contacts the shoulder 40b of the inner surface of the rear sleeve insertion hole 40a of the forcibly lowered tumbler 40. . Reference numeral 43d denotes a notch that engages with an inward flange 29a of the pipe 29 described later.
[0024]
FIG. 13 is a part of a front view of the tumbler lock of the present embodiment, in which the pipe 29 that houses the front sleeve 30 is viewed from the outside (see FIG. 5). However, the cap has been removed. The pipe 29 is provided with an inward flange 29a at the front end to prevent the front sleeve 30 from falling off and engage with a notch 43d of the key 43 to determine the longitudinal position of the key, thereby smoothly rotating it. To do. That is, the key does not come off during rotation or turn in a state where it is not fully inserted. The inward flange 29a is provided with two notches 29b at the left and right, and the key 43 can be inserted and removed at the position of the notch 29b. That is, after the key 43 is removed, the keyhole 30c of the front sleeve 30 faces either the left or the right rotated by 180 °.
[0025]
When operating the tumbler lock 20 as described above, the cap is removed, and the key 43 is inserted into the key holes 30c and 31c of the front sleeve 30 and the rear sleeve 31 from one notch 29b of the pipe 29 to the innermost position. At this time, the dents 43b of the key 43 come to the positions of the tumbler plates 35, the dents 43c come to the position of the forcibly lowered tumbler 40, and the notches 43d come to the position of the inward flange 29a of the pipe 29. Thus, since the notch 43d of the key 43 comes to the position of the inward flange 29a of the pipe 29, the key 43 can be turned with the inward flange 29a and the notch 43d engaged (see FIG. 14). .)
[0026]
When the key 43 rotates, first, the tumbler plate 35 is pushed and moved by the dents 43b contacting the upper side of the square holes 35a of each tumbler plate 35, and the gate holes 35c of each tumbler plate 35 are all fixed to the cam receiving member 26. It becomes the same height as 27. On the other hand, the rotation of the key 43 causes the rear sleeve 31 to rotate by the same angle, and the cam 32 attached to the parallel notch 31 b of the rear sleeve 31 rotates integrally with the rear sleeve 31. And the front-end | tip 32a of the cam 32 raises along the one cam relief part 26b of the cam receiving member 26 (refer FIG. 15).
[0027]
When the key 43 is further turned, the tip 32a of the cam 32 comes into contact with the cam receiving portion 26a of the cam receiving member 26 and presses the cam receiving member (large tilt) 26 to the side. At this time, at the position of the tumbler plate 35, the slit 43b of the key 43 rotates along the arcuate belly 35f formed at the center of the upper side of the square hole 35a of the tumbler plate 35, so that the tumbler plate 35 does not move up and down. And since all the gate holes 35c of each tumbler plate 35 are the same height as the hook 27 fixed to the cam receiving member 26, the hook 27 can pass through the gate hole 35c of each tumbler plate 35 in the left-right direction. Therefore, the cam receiving member 26 pressed by the tip 32a of the cam 32 moves to the side (see FIG. 16). In this way, the cannula 21 moves to the side and shifts from the locked state to the unlocked state, and from the unlocked state to the locked state. At this time, the tack 27 reaches the other tack hole 35b of each tumbler plate 35 (see FIG. 17).
[0028]
When the key 43 further rotates, the tip 32a of the cam 32 disengages from the cam receiving portion 26a of the cam receiving member 26 and descends along the other cam relief portion 26b, so that both the cam receiving member 26 and the cannuki 21 are further lateral. Never move to. Further, the key 43 has a dent 43b that moves away from the arcuate belly 35f at the center of the upper side of the square hole 35a of the tumbler plate 35 and moves downward, so that the tumbler plate 35 is driven by the urging force of the tumbler spring 37. Moving downward, the arcuate belly 35f at the upper edge of the square hole 35a comes into contact with the cylindrical portion 31d of the rear sleeve 31. When the key 43 rotates 180 ° from the insertion position, the key 43 can be pulled out from the other notch 29b of the pipe 29. At this time, the height positions of the gate holes 35c of the respective tumbler plates 35 are mixed and do not allow the passage of the tack 27. Therefore, the cannula 28 cannot move sideways, and is locked or unlocked. Is maintained (see FIG. 18).
[0029]
The operation of the forced lowering tumbler 40 will be described with reference to FIGS. When the key 43 is inserted into the keyholes 30c and 31c in the locked state or the unlocked state, the side surface of the key 43 is horizontally oriented and lies on one shoulder 40b of the rear sleeve insertion hole 40a of the forcibly lowered tumbler 40. It is in a state (see FIG. 19).
[0030]
When the key 43 is turned, the key 43 is rotated along a large arc at the top of the rear sleeve insertion hole 40a. At this time, the key 43b is in contact with the upper surface of the square hole 35a of the tumbler plate 35. Since the tumbler plate 35 is being lifted and the forced lowering tumbler 40 is also pushed back against the downward urging force of the tumbler spring 37 via the forced lowering pin 41 that is in contact with the pin receiving shoulder 35e of the tumbler plate 35. The parallel cut portion 31a of the rear sleeve 31 inserted into the sleeve insertion hole 40a slightly enters the lower half of the rear sleeve insertion hole 40a with a small width (see FIGS. 20 and 21).
[0031]
When the key 43 is rotated 180 ° from the insertion position, the key 43 43 of the key 43 comes into contact with the other shoulder 40b of the rear sleeve insertion hole 40a, and the forced lowering tumbler 40 is forcibly pushed down (see FIG. 22). Then, even if the urging force of the tumbler spring 37 fitted in the spring receiving slit 35d of each tumbler plate 35 is insufficient for any reason, each tumbler plate 35 is surely moved downward, and the upper edge of the square hole 35a. The belly 35f comes into contact with the cylindrical portion 31d of the rear sleeve 31.
[0032]
Thus, in the locked state or the unlocked state, the side surface of the key 43 is horizontal and lies on the shoulder 40b of the rear sleeve insertion hole 40a (see FIG. 23). Therefore, the key 43 can be pulled out from the other notch 29 b of the pipe 29.
[0033]
In the tumbler lock 20 of the present embodiment, each tumbler plate 35 is slidably supported in the circumferential groove 36a of the tumbler holding pin 36, and a constant gap is maintained between the tumbler plates 35. Compared with the conventional case where the tumbler plates 35 are in surface contact with each other, the operation of the tumbler plate 35 is smooth and reliable, and there are few failures. Therefore, it can also be applied to manhole locks that are exposed to much dust, mud, earth and sand, and even snow melting agents. In addition, since there is a gap between the tumbler plates 35, the coil spring 17 with the spring core 18 can be used as a tumbler spring, and there is less risk of interference between the springs compared to a conventional leaf spring, and the degree of freedom in design. Is also big.
[0034]
In the present embodiment, notches 29b are provided at two positions rotated 180 ° of the inward flange 29a of the pipe 29 that wraps the front sleeve 30, and the key 43 is extracted from the notches 29b in the locked state or the unlocked state. Therefore, it can be confirmed at a glance whether the tumbler lock 20 is in the locked state or the unlocked state by looking at the keyhole 30c after the key 43 is removed. This is particularly important when the tumbler lock 20 is applied to a manhole lock, since it is difficult to rock the heavy manhole cover 12 like a normal door for locking confirmation.
[0035]
Further, in this embodiment, a forced lowering tumbler 40 is provided, and the forced lowering tumbler 40 is rotated by the rotation of the key 43, each tumbler plate 35 is further connected via the forced lowering pin 41, and each tumbler spring 37 is opened (biased). Therefore, even if the urging force of each tumbler spring 37 is insufficient for any reason, each tumbler plate 35 moves reliably and returns to the normal position.
[0036]
Furthermore, in this embodiment, since the inward flange 29a is provided at the front end of the pipe 29, not only the front sleeve 30 is prevented from falling off, but also the notch 43d of the key 43 is engaged with the inward flange 29a. As a result, it is possible to prevent the key 43 from rotating in the middle or from being removed, or from being rotated halfway.
[0037]
Such a sliding tumbler lock 20 is installed in a state where its keyhole portion is disposed in the recess 16 and is covered with a closing body 50 for protecting it from the external environment. In the embodiment, the closing body 50 includes a metal inner cap 51 having a female screw portion 51 c that is screwed into a male screw portion 29 c around the keyhole portion, and an outer cap 52 that is integrally fitted to the outside of the inner cap 51. A packing 53 is provided between the closure 50 and the bottom of the lid recess (FIG. 2D). It is desirable that the gap between the inner wall of the recess 16 and the outer periphery of the outer cap 52 be a narrow gap into which no fingertip can be inserted.
[0038]
The flange portion of the inner cap 51 is provided with a mating engagement portion 54 that can be engaged only with the engagement portion 56 of the dedicated tool 55. In the illustrated dedicated tool 55, several protrusions are provided at the tip as engaging portions 56, engaged with engaging grooves provided as engaging counterparts 54 on the inner cap, and the inner end cap 57 is operated by operating the handle 57 at the shaft end. 51 is tightened and loosened. In the state where the keyhole portion of the sliding tumbler lock 20 is covered by the closing body 50, there is no room for inserting tools such as a bar or a screwdriver as shown in FIGS. This is the first stage where an effect can be expected. The inner cap 51 is fitted into the crown-shaped recess 59 of the dedicated tool 55.
[0039]
In order to open the cover 12 of the underground structure, therefore, the outer cap 52 of the closing body 50 is first removed using only the dedicated tool 55 described above, and then the inner cap 51 is loosened and removed using the dedicated tool 55. Thereafter, the key 43 is inserted into the common key holes 30c and 31c and rotated as described above to change from the locked state of FIG. 4 (a) to the unlocked state of FIG. 4 (b). In the unlocked state, the kanuki 21 is provided on the inner periphery of the lid receiving frame, and retracts inward from the engaging portion 18 utilizing the inward flange-like portion protruding inward, and the lid body 12 is removed. If it is lifted, the opening of the lid receiving frame 11 can be opened, but this is not different from a general opening operation. Since the packing 53 is tightened by the closing body 50, the lid body locking device 10 is effectively protected from the external environment.
[0040]
Moreover, since the cover body locking device 10 according to the present invention has an overall height lower than that of a conventional similar device, it is difficult to contact the lid receiving frame 11 when opening the lid body 12 after unlocking. However, since the sliding tumbler lock 20 is protected by the sturdy outer case 22 even in a contact state, the sliding tumbler lock 20 is sufficiently strong against impact and is unlikely to be damaged.
[0041]
【The invention's effect】
Since the present invention is configured and operates as described above, it exhibits extremely satisfactory durability as a locking device for a lid for an underground structure installed on a road, and is influenced by the external environment. There is almost no risk of malfunction. In addition, the present invention includes a locking means composed of a sliding tumbler lock, and also has a structure in which the keyhole portion is protected from the external environment by a closing body, and thus exhibits a double illegal intrusion prevention effect.
[Brief description of the drawings]
FIG. 1A is a plan view of an underground structure to which a lid locking device according to the present invention is applied.
(B) The front view which shows an exclusive tool.
FIG. 2A is an enlarged view of a main part of a dedicated tool.
(B) Similarly bottom view.
(C) Top view of the inner cap.
(D) Sectional drawing of the periphery of the keyhole part which attached the obstruction | occlusion body.
FIG. 3 is a cross-sectional view of an upper structure of an underground structure including the device of the present invention.
4A is a cross-sectional view showing a locked state of the lid locking device. FIG.
(B) Sectional drawing which similarly shows an unlocking state.
5 is a side view taken along line VV in FIG. 6 showing the structure of an embodiment of the present invention.
6 is a rear view, as viewed from the left, with the cover of FIG. 5 removed. FIG.
7A is a plan view, a side view, and a rear view showing the front sleeve. FIG.
(B) The front view, side view, and back view which show a rear sleeve.
FIG. 8 is a front view showing the shape of a cam (locking plate).
FIG. 9 is a front view showing the shape of a tumbler plate.
10A and 10B are diagrams showing the tumbler holding pin 16, in which FIG. 10A is a side view, FIG. 10B is a view seen from the left side of the head side (a), and FIG. Viewed.
FIG. 11A is a rear view showing a forced lowering tumbler.
(B) is a side view.
FIG. 12 is a side view of a key for locking and unlocking the tumbler lock of the present embodiment.
FIG. 13 is a lower front view of the present embodiment, showing the front surface of the pipe.
FIG. 14 to FIG. 18 are a series of diagrams for explaining the relationship between the rotation of the key and cam during locking and unlocking and the movement of the tumbler plate, tack, cam receiving member and kanuki. The first stage is shown.
FIG. 15 is an explanatory view showing the second stage in the same manner.
FIG. 16 is an explanatory view showing the third stage.
FIG. 17 is an explanatory view showing the fourth stage.
FIG. 18 is an explanatory view showing the fifth stage.
FIG. 19 to FIG. 23 are a series of diagrams for explaining the relationship between the rotation of the key and the movement of the forcibly lowered tumbler and tumbler plate during locking and unlocking, and FIG. 19 shows the first stage thereof. .
FIG. 20 is an explanatory view showing the second stage in the same manner.
FIG. 21 is an explanatory view showing the third stage in the same manner.
FIG. 22 is an explanatory view showing the fourth stage.
FIG. 23 is an explanatory view showing the fifth stage.
[Explanation of symbols]
10. Lid lock device according to an embodiment of the present invention
11 Lid frame
12 Lid
16 recess
18 engaging part
20 Tumbler tablets
21 Cannuki
26 Cam receiving member
27 Tsuku
30 Front sleeve
31 Rear sleeve
32 cams
35 Tumbler board
43 keys
50 Occlusion body
51 inner cap
52 Outer cap

Claims (4)

A lid locking device that can withstand destructive activities against underground structures that confiscate communication cables, etc., and has a reciprocating cannula, which is locked by engaging this cannula with an engaging part on the lid receiving frame side. The sliding tumbler lock that is unlocked by releasing from the engagement is used as the locking means, and the sliding tumbler lock has a key hole disposed on the back surface of the lid facing the unlocking opening provided on the lid surface and sliding. to protect the tumbler from the external environment, Ri formed by closed by closure of the unlocking opening,
Sliding tumbler tablets are reciprocated and locked or unlocked,
A cam receiving member (large tilt) fixed to the kanuki and having a cam receiving portion and cam relief portions on both sides of the cam receiving portion;
A stick fixed to the cam receiving member;
A cam (locking plate) that is rotated by a key, the tip passes through the cam relief portion of the cam receiving member at the beginning and the end of rotation, and the tip presses the cam receiving portion of the cam receiving member at the middle of rotation;
A plurality of tumbler plates that are supported so as to be movable in a direction crossing the direction of movement of the kanuki, and have a pair of tuck holes arranged in the direction of movement of the kanuki, a gate hole that communicates with the tuck holes, and a space into which a key is inserted. A tumbler tablet with
The above void has an abdomen with the central part cut into an arc,
At the initial stage of rotation of the key inserted in the void, the inner edge of the void is pressed against the key's dent, and the tumbler plate moves against the urging force, and the crater moves the tumbler plate in the middle of rotation. Without rotation, and at the end of rotation, the scratches are separated from the inner edge of the void, and the tumbler plate is returned to its original position by the urging force.
The position of the gate hole varies depending on each of the plurality of tumbler plates,
When the tumbler plate moves at the initial stage of the rotation of the key, all the positions coincide with the position of the tack.
A lid locking device for an underground structure, wherein the tumbler plates are held with a gap therebetween . Key is underground construction for the lid lock apparatus according to claim 1, wherein is configured to be inserted and removed in a rotary position of the two positions corresponding to the moving direction of the yoke. Key, in the rotating end moves in the direction of action of the biasing force by increments of keys, a plurality of tumbler plates according to claim 1 or 2 wherein has a configuration in which the forced lowering tumbler for pressing in the direction Cover locking device for underground structures. The closure body is screwed into the male thread portion provided around the keyhole portion on the sliding tumbler lock side, and has a mating engagement portion that can engage only with the engagement portion of the dedicated tool on the outer peripheral portion. The lid locking device for an underground structure according to claim 1.

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