JP2567287Y2 - Cover device for lock housing of groove lid - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a groove cover provided with a locking mechanism for preventing unauthorized opening of a groove cover such as a manhole cover or a grating used for a side groove. And a locking device for a cover device of the locking housing. 2. Description of the Related Art A groove cover such as a manhole cover or a grating is attached to a receiving frame provided along the groove edge with its peripheral edge placed thereon. By the way, if this groove cover is opened by an unnecessary third party, there is a danger that pedestrians may fall into the opened manholes or grooves, or that the automobile or the like may lose its wheel, and must be avoided. Further, in a trench for underground wiring in which a power line and a communication line are buried, it is severely damaged and must be absolutely prevented from being cut due to mischief or the like in which a trench cover is opened without permission. Therefore, various groove lids having a locking mechanism in which the groove lid is connected and fixed to a receiving frame and can be released only by a person concerned have been proposed. A locking mechanism of this type is disposed near a groove lid mounted on a receiving frame provided along a groove edge such as a manhole or a side groove, and has an operation port at an upper portion and an insertion hole at a bottom portion. Are provided with a locking housing hole respectively formed, suspending a connecting rod provided with a link plate at the lower end of the insertion hole, forming a concave groove at the upper end of the connecting rod into which a tool such as a flathead screwdriver can be inserted, By rotating the connecting rod using the tool, the tip of the linking plate is pivotally converted into a locking position facing the lower surface below the locking lower surface formed on the receiving frame and an unlocking position not facing the lower surface. Are provided. By the way, a cover is usually attached to the operation port of the lock housing, and the cover is removed to unlock the lock mechanism. By the way, the conventional cover is usually simply fixed with a screw, and is easily opened by a general tool, so that the effect of the locking mechanism can be impaired. An object of the present invention is to provide a cover device which has a simple structure and is difficult to open. SUMMARY OF THE INVENTION The present invention is arranged near a groove lid mounted on a receiving frame provided along a groove edge such as a manhole or a side groove. On the bottom of the locking housing hole, which is equipped with a locking mechanism that makes the groove lid immovable from the receiving frame,
A cover body that covers the operation port and has an outer shape that covers the entire operation port, and a cover main body in which a locking hole is formed substantially in the center, and is fixed to the lower surface of the cover main body, and on the lower surface,
A U-shaped support frame piece in which a support hole vertically aligned with the lock hole of the cover main body is formed, and inserted into the lock hole of the cover main body,
The lower end is rotatably supported by the support hole of the U-shaped support frame piece and is held so as not to be able to move up and down, and is longer than the short dimension of the operation port of the groove lid and shorter than the long dimension. It has a vertical dimension and is constrained by the support frame piece in the U-shaped support frame piece and screwed to the holding screw in a non-rotatable manner. When the holding screw is rotated, the guiding action of the holding screw causes a vertical direction. A cover device for a locking case with a groove lid, comprising: The means for attaching and detaching the cover device will be described. First, the holding piece inserted into the support frame piece of the cover device is set so that the longitudinal center axis of the holding piece and the longitudinal center axis of the operation port are in the same direction. Insert into mouth.
Then, after the support frame piece and the holding piece are inserted into the operation port, the entire cover device is rotated substantially 90 °, and the operation port is completely covered by the cover. In this state, the holding piece crosses the operation port, and both ends protrude to both sides with respect to the side edge of the operation port. After covering the operation port with the cover main body in this way, the holding screw is rotated, and by this rotating operation, the holding piece comes into contact with both side surfaces of the support frame piece and cannot be rotated.
It moves in the direction of the cover main body and comes into pressure contact with the groove lid from below. By this operation, the cover main body and the holding piece are sandwiched on the side edge of the operation port 3, and the cover device is fixed to the groove cover. [0007] In order to remove the cover device of the operation port, which is clamped and fixed, the clamping screw is rotated in the opposite direction.
As a result, the holding piece pressed against the lower surface of the groove lid moves downward, and the connection of the cover device to the groove lid is released.
Therefore, when the cover device is rotated by 90 °, the longitudinal directions of the holding piece and the operation port coincide with each other. Since the length of the holding piece is equal to or less than the longitudinal dimension of the operation port, the cover device can be removed from the operation port. [0008] As described above, the removal of the cover device requires not only rotating the holding screw but also rotating the cover device by 90 °. Therefore, for a third party who does not know such a mechanism, it is necessary to open the cover device. Becomes difficult, and the usefulness of the locking mechanism can be improved. An embodiment of the present invention will be described with reference to the accompanying drawings. 1 to 3, reference numeral 1 denotes a groove cover whose peripheral edge is supported by the mounting portion 31 of the receiving frame 30 and is attached on the groove, and a locking housing hole 2 ( One is not shown). An operation port 3 having a rectangular shape or an elliptical shape and having a short dimension and a long dimension in the vertical and horizontal directions is formed in an upper portion of the lock housing 2, and a lock mechanism is mounted on a bottom portion thereof. The locking mechanism will be described. An insertion hole 4 is formed at the bottom of the lock housing hole 2. The insertion hole 4 is provided through a mounting plate 6 fixed on the bottom of the groove cover 1 with bolts 7, 7, and communicates with a loose insertion hole 5 formed in the bottom. Then, the connecting rod 8 is inserted through the insertion hole 4,
The neck 10 is suspended around the insertion hole 4. The connecting rod 8 has an unlocking operation section 9 having a hexagonal portion 9a on the outer peripheral portion thereof and a female screw 9b formed at the center thereof at an upper portion thereof. A rectangular stopper 11 is provided immediately above the neck 10. And this stopper 11
Rotation stopper 1 projected parallel to the mounting plate 6
When the connecting rod 8 rotates while being suspended, the end edge of the stopper 11 abuts against the rotation stoppers 12 to prevent the rotation thereof. . A connecting plate 14 is fixed to the lower end of the connecting rod 8, and a moderation spring 15 is mounted in the play hole 5 between the upper surface of the connecting plate 14 and the lower surface of the mounting plate 6. The connecting rod 8 is urged downward. The link plate 14 is
One end thereof is supported by the connecting rod 8, and the other end protrudes from the lower surface of the receiving frame 30 at the locked position, and faces the lower surface 32 of the receiving frame below. Further, a locking projection 16 is formed downward at the bottom of the groove cover 1, and the rear edge of the link plate 14 abuts with the rotation of the connecting rod 8 to prevent the rotation thereof. In this way, only the one-way rotation of the link plate 14 can be performed at a raised position of the connecting rod 8 described later. On the other hand, the operation port 3 of the insertion hole 4 is shown in FIG.
As shown in 6a and 6b, a cover device 20 according to the present invention is provided to block the operation port 3. The cover device 20 includes a cover main body 21, a support frame piece 22, a holding piece 23,
And a clamping screw 24. That is, the cover main body 21 has a similar shape larger than the operation port 3 so as to cover the entire operation port 3 and is made of a strong material such as stainless steel. Has inserted the clamping screw 24. A U-shaped support frame piece 22 having a support hole on the bottom surface is welded and fixed to the lower surface thereof by flange edges projecting from both ends thereof. In the U-shaped support frame piece 22,
A rectangular holding piece 23 having a screw hole is inserted into the center thereof, and a holding screw 24 having a neck supported rotatably on the cover main body 21 is screwed into the screw hole. Dress 23
I support. The lower end of the holding screw 24 is inserted into a support hole provided on the bottom surface of the support frame piece 22, and a washer 25 is attached to the tip of the holding screw 24.
4 is prevented from escaping. The holding piece 23 has a vertical dimension longer than the short dimension of the operation port 3 of the groove lid 1 and shorter than the long dimension. The method of mounting the cover device 20 will be described in detail with reference to FIGS. 6A and 6B. First, the holding piece 23 inserted into the support frame piece 22 of the cover device 20 is
The insertion piece 23 is inserted into the operation port 3 so that the longitudinal center axis of the holding piece 23 and the longitudinal center axis of the operation port 3 are in the same direction. After the support frame piece 22 and the holding piece 23 are inserted into the operation port 3, the entire cover device 20 is moved 90
And the cover 21 is completely covered by matching the shape of the cover main body 21 and the shape of the operation port 3. In this state, the holding piece 23 crosses the operation port 3, and both ends protrude to both sides with respect to the side edge of the operation port 3. After covering the operation port 3 with the cover main body 21 in this manner, the clamping screw 24 is rotated rightward. Due to this rotation operation, the holding piece 23 comes into contact with both side surfaces of the support frame piece 22 and cannot be rotated. Therefore, the holding piece 23 moves in the direction of the cover main body 21 and presses against the groove lid 1 from below. Become. By this operation, the cover main body 21 and the holding piece 23 are held on the side edge of the operation port 3, and the cover device 20 is fixed to the groove cover 1. In order to remove the cover device 20 of the operation port 3 which has been clamped and fixed, the clamping screw 24 is rotated to the left. As a result, the holding piece 23 pressed against the lower surface of the groove cover 1 moves downward, and the connection of the cover device 20 to the groove cover 1 is released. Therefore, the cover device 20 is set to 90 °
When rotated, the longitudinal direction of the holding piece 23 and the operation port 3 match. Since the length of the holding piece 23 is equal to or less than the longitudinal dimension of the operation port 3, the cover device 20 can be removed from the operation port 3. As described above, when the cover device 20 is removed,
In addition to rotating the clamping screw 24, the cover device 2
Since it is necessary to rotate 0 by 90 °, it is difficult for a third party who does not know such a mechanism to open the cover device 20, and the usefulness of the locking mechanism can be improved. Next, a description will be given of the attaching / detaching means of the groove cover 1 having such a configuration. In the locked state of the groove cover 1 shown in FIG.
As described above, one end edge of the link plate 14 is vertically opposed to the locking lower surface 32. For this reason, even if it tries to float the groove lid 1 in this state, the linking plate 14 engages with the locking lower surface 32 and cannot be detached. To remove the groove cover 1, first, as described above, the cover device 20 is removed, and then the tool 40 is connected to the unlocking operation section 9 of the connecting rod 8 as shown in FIG. As shown in FIG. 4, the tool 40 has a male screw portion 42 at the lower end thereof which is screwed into the female screw 9b, and a main rod portion 41 having a ring handle 43 fixed to the upper end thereof, and a pivotal movement of the main rod portion 41. As much as possible,
At the lower end thereof, there is provided a hexagonal connecting cylinder end 45 externally fitted to the hexagonal portion 9a of the unlocking operation section 9 and a sub-rod portion 44 provided with a turning rod 46 outward. Then, the connecting cylinder end 45 of the sub-rod portion 44 of the tool 40 is externally fitted to the hexagonal portion 9a, and the ring handle 43 is further rotated to screw the male screw portion 42 of the main rod portion 41 into the female screw 9b. Combine. Thus, the tool 40
Is pulled against the moderating spring 15 to raise the connecting rod 8, and the stopper 11 is stopped as shown in FIG.
, And further operate the rotating rod 46 to rotate the link plate 14 in a direction in which the link plate 14 does not abut the locking projection 16, and the end of the link plate 14 is locked. The unlock position does not correspond to the lower surface 32 from below. Then, when the tool 40 is pulled again in this state, the groove cover 1 floats upward,
It can be opened. Incidentally, even when the tool 40 is removed at the open position of the connecting rod 8, the stopper 11 is held in elastic contact with the rotation stoppers 12, 12 by the urging action of the moderation spring 15. For this reason, the link plate 14 does not easily move to the locking position, and does not become an obstacle when the groove cover 1 is attached. In order to lock the groove cover 1, the male screw portion 42 of the tool 40 is screwed to the female screw 9b, and the connecting cylinder end 45 of the sub-rod portion 44 is externally fitted to the hexagonal portion 9a. In the state
The periphery of the groove cover 1 is mounted on the mounting portion 31 and the ring handle 43 is mounted.
May be rotated to position the stopper 11 between the rotation stoppers 12. And in this positioning state, the tool 4
In a state where 0 is removed, the connecting rod 8 does not float upward due to the action of the moderation spring 15. And the tool 40
Is removed, and the operation port 3 is shielded by the cover device 20. In this locking mechanism, the groove cover 1
In the locked state, the stopper 11 is restrained by the rotation stoppers 12 and 12 so that the connecting rod 8 cannot rotate. Further, since this position is held by the moderating spring 15, the connecting rod 8 is linked by vibrations caused by the passage of the vehicle or the like. The plate 14 does not rotate so that the groove cover 1 can be opened.
Can be prevented from opening beforehand. As has been clarified by the above description, the present invention removes the cover device 20 of the operation port fixedly held by the operation port by rotating the holding screw 24,
After the holding piece 23 is lowered, it is necessary to rotate the cover device by 90 °, so that it is difficult for a third party who does not know the structure of the cover device 20 to open the cover device 20, and the locking mechanism is useful. There is an excellent effect that can improve the properties. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional side view of a main part in a locked state. FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a sectional view taken along line BB of FIG. 1; FIG. 4 is a front view showing a right half of the tool 40 cut away. 5 is a vertical sectional side view of a main part showing an unlocking operation by the tool 40. FIG. FIG. 6A is a perspective view showing the detached state of the cover device 20 of the present invention. FIG. 6B is a perspective view showing a mounting state of the cover device 20 of the present invention. [Description of Signs] 1 Slot lid 2 Locking housing hole 3 Operation port 20 Cover device 21 Cover main body 22 Support frame piece 23 Nipping piece 24 Nipping screw 30 Receiving frame

Claims (1)

(57) [Claims for registration of utility model] Ride on a receiving frame provided along the groove edge of a manhole or gutter.
It is located on the side of the groove lid on which it is placed, and the operation port is on the top and
Is equipped with a locking mechanism that makes it impossible to remove the groove lid from the receiving frame
The lock housing has an outer shape that covers the operation opening of the lock housing and covers the entire operation opening.
Formed on the cover main body and the lower surface of the cover main body.
U-shaped support with support holes vertically aligned with the locking holes
The supporting frame piece is inserted into the retaining hole of the cover main body,
Rotatably supported by the support holes of
And longer than the short dimension of the operation port of the groove cover and the long dimension
Also has a short vertical dimension, and within the U-shaped support frame piece,
It is restrained and screwed to the holding screw so that it cannot rotate, and the holding screw is
When rotated, it is moved vertically by the guiding action of the clamping screw.
Characterized in that it has a holding piece that can be moved
Covering device for locking enclosure of lid.