JPH0567647U - Locking device for groove lid - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a highly reliable groove lid locking device that can be released only by the parties concerned. A connecting rod 8 is provided with a linking plate 14 at its lower end, which engages with a locking lower surface 32 of a receiving frame 30 and locks the groove lid 1 irremovably.
Is hung from the insertion hole 4 at the bottom of the locking housing hole 2, the stopper 11 provided on the connecting rod 8 is non-rotatably restrained by the rotation stoppers 12 and 12, and the tool 40 is connected to the unlocking operation portion 9. Then, the lock can be unlocked only by raising and then rotating, and the connecting rod 8 is held by the moderation spring 15 so that rotation and levitation are not caused by vibration or the like.

Description

[Detailed description of the device]       [0001]     [Industrial applications]   The present invention prevents unauthorized opening of a groove lid such as a grating used for a manhole lid or a gutter. It relates to a locking device of the groove lid for stopping.       [0002]     [Prior Art]   Groove covers such as manhole covers and gratings are placed on the receiving frame provided along the groove edges. It is attached with the peripheral edge placed. By the way, this groove lid was opened by an unnecessary third party. Then, pedestrians may fall into the opened manhole or ditch, or cars may derail. It is dangerous and must be avoided. Or underground distribution where power lines and communication lines are buried In the groove for wire, the groove lid may not be cut without permission because it has been opened without permission. The damage is so great that it must be prevented absolutely. Therefore, the groove lid is used as a receiving frame. Various locking devices for groove lids have been proposed that can be connected and fixed and can be released only by parties concerned. It       [0003]   In this type of conventional locking device, it is provided along the groove edge such as manhole and side groove. It is arranged near the side of the groove lid that is mounted on the receiving frame, the operation port is on the top and the insertion hole is on the bottom. A connecting rod having a locking casing hole formed in each of the Suspended and formed a groove on the upper end of the connecting rod into which a tool such as a flat-blade screwdriver can be inserted. Then, by rotating the connecting rod using the tool, the tip of the linking plate is formed on the receiving frame. It is possible to change the rotation position between the locked position that faces the lower surface of the locked lower part and the unlocked position that does not. The thing of the structure made like this is provided.       [0004]   By the way, in such a structure, since the connecting rod is freely rotatable, When attaching the groove lid, it is easy for the linking plate to move to the locking position. It is necessary to return it to the unlocked state, which makes the work to be applied troublesome, and Even when locked, it can be easily unlocked by rotating due to vibrations of passing vehicles, etc. The reliability is low, and it can be opened with a simple tool, so mischief and theft may occur. Easy to grow.   An object of the present invention is to provide a locking device that can eliminate the above problems. .       [0005]     [Means for Solving the Problems]   The present invention   Placed on the side of the groove lid that is mounted on the receiving frame provided along the groove edge such as the manhole and the side groove. A lock housing hole provided with an operation port at the top and an insertion hole at the bottom,   A rotation stopper formed on the periphery of the insertion hole at the bottom of the locking casing,   It is inserted into the insertion hole and the neck is suspended at the periphery of the insertion hole so that it can be lifted and rotated. It is held and pulled and rotated by a tool inserted from the operation port on the top. Equipped with an unlocking operation part that is operated sequentially and further contacts the rotation stop at the hanging position To prevent it from rotating and release the contact with the rotation stopper at the raised position to the side. With the connecting rod protruding   It is fixed to the lower end of the connecting rod, and the tip of the connecting rod is formed into a receiving frame by rotating the connecting rod. Rotation conversion between a locked position that faces the lower surface of the formed lock below and an unlocked position that does not face With a linkage board   A lower peripheral edge of the insertion hole and a moderation spring mounted between the upper surfaces of the linking plates. It is characterized by having.       [0006]     [Action]   Attach a tool to the upper end of the connecting rod and pull it, so that the stopper stops rotation. Position so that it does not come into contact with the female. The end is pivotally converted to an unlocked position where it does not face the locking lower surface formed on the receiving frame below. But If the tool is pulled further after the removal, the groove lid will float and be removed. It       [0007]   When attaching the groove lid to the groove, leave the link plate in the unlocked position as described above. The peripheral edge of the groove lid is locked to the receiving frame, the connecting rod is returned to the hanging position, the tool is rotated, and Just return the link plate to the locked position.       [0008]   On the other hand, the connecting rod is a moderation mounted between the lower peripheral edge of the insertion hole and the upper surface of the linking plate. Since it is held in position by a spring, it will not be affected by vibrations etc. even if it is in the unlocked or locked position. It does not rotate or levitate.       [0009]     【Example】   An embodiment of the present invention will be described with reference to the accompanying drawings.   1 to 3, the peripheral edge 1 is supported by the mounting portion 31 of the receiving frame 30 and is placed on the groove. It is a groove lid to be attached, and the locking casing hole 2 (one of which is shown Without) is formed. The locking casing 2 has a rectangular shape or an oval shape at the top. The operation port 3 is formed in a shape having a short dimension and a long dimension in the vertical and horizontal directions. An insertion hole 4 is formed at the bottom.       [0010]   The insertion hole 4 is a mounting plate fixed on the bottom of the groove lid 1 with bolts 7, 7. 6 is provided so as to communicate with the loose insertion hole 5 formed in the bottom. And the insertion hole 4, the connecting rod 8 is inserted, and its neck 10 is suspended around the insertion hole 4 and suspended. It The connecting rod 8 has a hexagonal portion 9a on its outer peripheral portion and a female screw 9b at its center. The formed unlocking operation part 9 is provided at the upper part. In addition, a rectangle is provided directly above the neck 10. A stopper 11 is provided. And this stopper 11 is the mounting play. It is located between the rotation stoppers 12 and 12 which are formed in parallel with each other on the toe 6, and the connecting rod 8 is suspended. When the stopper 11 is rotated in the state of being kept, the end edge of the stopper 11 is stopped by the rotation stoppers 12, 12 It abuts against and disables its rotation.       [0011]   A link plate 14 is fixed to the lower end of the connecting rod 8, and Between the surface and the lower surface of the mounting plate 6, the moderation spring 15 is attached in the loose insertion hole 5, and The rod 8 is urged downward. The linking plate 14 is supported on the connecting rod 8 at one side thereof. Then, the other end is projected to the lower surface of the receiving frame 30 at the locking position, and the locking lower surface 32 is lowered downward. Facing each other. Further, a locking protrusion 16 is formed downward on the bottom of the groove lid 1. As the connecting rod 8 rotates, the rear edge of the linking plate 14 comes into contact with the connecting rod 8 to prevent its rotation. When the connecting rod 8 is raised, which will be described later, the linking plate 14 moves in one direction. Only rotation is possible.       [0012]   On the other hand, the operation port 3 of the insertion hole 4 has a cover device as shown in FIGS. 20 is provided to shut off the operation port 3. This cover device 20 is a cover main It is composed of a body 21, a support frame piece 22, a sandwiching piece 23, and a sandwiching screw 24. You That is, the cover main body 21 covers the operation port 3 so as to cover the entire operation port 3. It has a very similar shape and is made of a strong material such as stainless steel. A sandwiching screw 24 is inserted in the locking hole at the center. And, on its lower surface, the bottom The U-shaped support frame piece 22 having a support hole on the surface is welded and fixed by the brim edges projecting at both ends thereof. It is fixed.       [0013]   Then, in the U-shaped support frame piece 22, a rectangular parallelepiped having a screw hole at the center thereof. The sandwiching piece 23 is inserted into the screw hole, and the neck is rotatably attached to the cover main body 21. The supported sandwiching screw 24 is screwed to support the sandwiching piece 23. The pinching screw The lower end portion of the child 24 is inserted into a support hole provided in the bottom surface of the support frame piece 22, A washer 25 is attached to the tip of the pin to prevent the sandwiching screw 24 from coming out. It The sandwiching piece 23 is longer than the lateral dimension of the operation port 3 of the groove lid 1 and has a longitudinal dimension. It has a shorter vertical dimension than.       [0014]   A method for attaching the cover device 20 described above will be described in detail with reference to FIGS. 6a and 6b. It   First, the sandwiching piece 23 inserted in the support frame piece 22 of the cover device 20 is attached to the sandwiching piece 23. Make sure that the longitudinal central axis of the piece 23 and the longitudinal central axis of the operation port 3 are in the same direction. insert. Then, the support frame piece 22 and the sandwiching piece 23 are inserted inside the operation port 3. After that, the entire cover device 20 is rotated by 90 ° so that the shape of the cover main body 21 becomes The operation port 3 is made to have the same shape and completely covered. In this state, the sandwiching piece 23 is attached to the operation port 3. On the other hand, it has a cross shape, and both ends thereof project to both sides with respect to the side edge of the operation port 3. And After covering the operation port 3 with the cover main body 21 as described above, The child 24 is rotated to the right. By this rotation operation, the sandwiching piece 23 is supported. Since it cannot rotate because it abuts on both sides of the frame piece 22, the direction of the cover main body 21 It moves to and is pressed against the groove lid 1 from below. By this operation, the operation port A cover main body 21 and a sandwiching piece 23 are sandwiched between the side edges of the cover device 20, and the cover device 20 includes the groove cover 1 Will be fixed to.       [0015]   In order to remove the cover device 20 of the operation port 3 which is clamped and fixed, the clamp screw is used. Rotate 24 to the left. As a result, the sandwiched member is pressed against the lower surface of the groove lid 1. The piece 23 moves downward, and the cover device 20 is disconnected from the groove lid 1. Therefore When the cover device 20 is rotated 90 °, the longitudinal direction of the sandwiching piece 23 and the operation port 3 becomes Match. Since the length of the sandwiching piece 23 is less than the longitudinal dimension of the operation port 3, The bar device 20 can be removed from the operation port 3.       [0016]   Next, the attaching / detaching means of the groove lid 1 having such a configuration will be described. Groove cover shown in FIG. In the locked state of No. 1, as described above, one end edge of the linking plate 14 has the locking lower surface 32. And upside down. Therefore, even if the groove lid 1 is attempted to float in this state, The engaging plate 14 engages with the locking lower surface 32 and cannot be detached.       [0017]   To remove the groove lid 1, first remove the cover device 20 as described above. Then, as shown in FIG. 5, the tool 40 is connected to the unlocking operation portion 9 of the connecting rod 8. This tool 40 As shown in FIG. 4, the lower end is provided with a male screw portion 42 that is screwed into the female screw 9b, and the upper end is formed. A main rod portion 41 to which a ring handle 43 is fixedly attached, and a main rod portion 41 rotatably fitted over the main rod portion 41. , A hexagonal connecting cylinder end 45 fitted to the hexagonal part 9a of the unlocking operation part 9 at the lower end thereof. In addition, the auxiliary rod portion 44 is provided with a rotating rod 46 on the outside. And this work The connecting cylinder end 45 of the auxiliary rod portion 44 of the tool 40 is externally fitted to the hexagonal portion 9a and further The handle 43 is rotated to screw the male screw portion 42 of the main rod portion 41 into the female screw 9b. Then, the tool 40 is pulled against the moderation spring 15 to raise the connecting rod 8, Position the lid 11 above the protrusion height of the rotation stoppers 12, 12 as shown in FIG. By operating the rotating rod 46, the linking plate 14 is moved in the direction in which the linking plate 14 does not contact the locking projection 16. 14 is rotated so that the end of the linking plate 14 does not correspond to the lower surface 32 of the lock from below. I will set it. Then, when the tool 40 is pulled again in this state, the groove lid 1 floats upward. However, it can be opened. At the open position of the connecting rod 8, remove the tool 40. Even if it is excluded, the stopper 11 stops the rotation by the urging action of the moderation spring 15. , 12 are held in elastic contact with each other. Therefore, the linking plate 14 is easily moved to the locked position. There is no obstacle when simply moving and attaching the groove lid 1.       [0018]   To lock the groove lid 1, contrary to the above, the male screw portion 42 of the tool 40 is inserted into the female screw. 9b and the connecting cylinder end 45 of the auxiliary rod portion 44 is externally fitted to the hexagonal portion 9a. 1 Place the periphery on the mounting portion 31, rotate the ring grip 43, and mount the stopper 11 It may be located between the rotation stoppers 12, 12. And in this positioning state, the tool With 40 removed, the connecting rod 8 floats upward by the action of the moderation spring 15. There is nothing to do. Then, after removing the tool 40, the operation port 3 is opened with the cover device 20. Shield.       [0019]   Thus, in such an embodiment, when the groove lid 1 is in the locked state, the connecting rod 8 has the rotation stopper 1 The stopper 11 is constrained by 2 and 12 so that it cannot be rotated. Since it is held by the ridge 15, vibration due to traffic of the vehicle, etc. There is no possibility that the groove lid 1 can be opened by rotating the groove lid 14, and the groove lid 1 Can be prevented from opening.       [0020]     [Effect of the device]   As will be apparent from the above description, the present invention provides the lower surface 3 for locking the receiving frame 30. A connecting rod 8 having a linking plate 14 at its lower end for engaging with 2 and locking the groove lid 1 in a detachable manner. It is hung in the insertion hole 4 at the bottom of the locking housing hole 2 and the stopper 11 provided on the connecting rod 8 is rotated. The stoppers 12 and 12 are non-rotatably restrained, the tool 40 is connected to the unlocking operation portion 9, It can be unlocked only by raising and then rotating, and the connecting rod 8 Is held by the moderation spring 15 so that rotation and levitation do not occur due to vibration. As a result, the locked state and the unlocked state can be reliably held, and the tool 40 is provided. Those who do not will not be able to open the groove lid 1, which is a perfect locking device for this kind of groove lid. It has excellent effects such as a locking mechanism.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical 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. FIG. 4 is a front view showing the right half of the tool 40 by cutting. FIG. 5 is a vertical cross-sectional side view of essential parts showing an unlocking operation by the tool 40. 6a is a perspective view showing a detached state of the cover device 20 of the present invention. FIG. FIG. 6b is a perspective view showing a mounted state of the cover device 20 of the present invention. [Description of Reference Signs] 1 Groove cover 2 Locking housing hole 3 Operation port 4 Insertion hole 8 Connecting rod 9 Unlocking operation part 10 Neck part 11 Stopper 12, 12 Rotation stop 14 Link plate 15 Moderation spring 30 Receiving frame 32 Locking lower surface 40 Tool

Claims (1)

[Claims for utility model registration] It is arranged near the side of the groove lid that is mounted on the receiving frame provided along the groove edge such as manhole and side groove, and the operation port is formed in the upper part and the insertion hole is formed in the bottom part. And a rotation stopper projecting from the periphery of the insertion hole at the bottom of the locking casing hole, and inserted into the insertion hole to lock the neck part at the periphery of the insertion hole so that it can be moved up and down and rotated. It is to be hung, and is provided with an unlocking operation section that is subjected to a pulling operation and a rotating operation in order by a tool inserted from the operation port at the upper part, and further comes into contact with the rotation stop at the hanging position. A connecting rod, which is fixed to the lower end of the connecting rod, is fixed to the lower end of the connecting rod so that the stopper cannot rotate and the contact with the rotation stopper is released at the raised position. Is converted into a locked position that faces the lower locking surface formed on the receiving frame and a unlocked position that does not. A locking device for the groove lid, comprising: a linking plate to be connected, a lower peripheral edge of the insertion hole, and a moderation spring mounted between the upper surfaces of the linking plate.