JPS6019155Y2 - Manhole cover opening device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a manhole cover opening device that can easily open a manhole cover.

Conventionally, when opening a manhole cover, a crowbar was inserted through a cutout hole pre-shaped around the cover.
The tip of the crowbar is locked to the back of the lid, and the near end of the crowbar is applied to the frame of the manhole, and the lid is pried open using the principle of leverage, but the force of the crowbar is dispersed horizontally and lifts the lid. Since the force applied upward is small, if the fitting part between the lid and the receiving frame becomes rusty or the fitting is too tight due to the lid digging into the receiving frame, the lid cannot be opened as expected or it may take time to open the lid. was there.

SUMMARY OF THE INVENTION The present invention solves the drawbacks of the prior art and aims to provide a manhole cover opening device that can very easily open a manhole cover.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a manhole cover opening device according to an embodiment of the present invention. In the figure, 1 is a support rod having a male screw 2 on its outer periphery, and a bundle 3 is fixed to the upper part of the support rod 1. , or provided removably.

Reference numeral 4 denotes an elevating metal fitting, which has a through female threaded hole 5 into which the support rod 1 is screwed, and a cutout hole in the lower part of one side for opening the manhole cover, which is shaped like an abbreviation. A hook part 6 to be hooked on the back surface of the manhole cover is provided, and a holding part 7 is provided at the upper part of one side of the manhole cover to press and fix the surface of the manhole cover in the vicinity of the notch hole for opening the manhole cover, facing the hook part 6.

That is, the holding part 7 takes the form of a support piece part 8 with a female threaded hole 9 in the upper part of one side of the lifting fitting 4, and a holding bolt 10 is screwed into the female threaded hole 9 of this support piece part 8, and the holding part 7 is pressed. The fixing bolt 10 is adjusted to press and fix the surface of the manhole cover with the tip of the bolt.

Further, as shown in FIG. 2, this holding part 7 has a holding rod insertion hole 11 formed in the support piece 8 of the lifting fitting 4, and a pin insertion hole 12 to hold the support piece 8. By inserting the holding part 13 into the rod insertion hole 11 and inserting the pin 15 into the pin insertion hole 12 of the support piece part 8 and the pin insertion hole 14 of the holding part 13, the tip of the holding part 13 closes the manhole cover. The surface may be fixed by pressing.

Furthermore, as shown in FIG. 3, the holding part 7 includes a worm 16 provided on one side of the lifting fitting 4, and a holding fitting piece that is meshed with the worm 16 and is slidable on one side end of the lifting fitting 4. 17
is provided, and by rotating the worm 16, the retaining metal piece 17
The surface of the manhole cover may be fixed by pressing.

Next, a method of using the manhole cover opening device of the present invention will be explained.

In FIG. 4, 20 is a manhole cover, and 21 is its receiving frame.

Therefore, when trying to open the manhole cover 20,
Insert the abbreviated hook part 6 provided at the bottom of one end of the lifting fitting 4 into the notch hole 22 for opening the cover formed on the periphery of the manhole cover 20 as shown by the dotted line in FIG. The hook part 6 is hooked on the back surface of the manhole cover 20 near the notch hole 22.

Then, the holding bolt 10 of the holding part 7 is tightened to the surface of the manhole cover 20 near the notch hole 22, and the area near the notch hole 22 of the manhole cover 20 is clamped and fixed between the holding bolt 10 and the hook part 6, and the manhole cover 20 is lifted and lowered. Place the tip of the support rod 1 screwed into the female through hole 55 of the metal fitting 4 on the upper surface of the receiving frame 21 of the manhole,
When the support rod 1 is rotated using the handle 3, the lifting fitting 4 moves upward on the support rod 1.

At this time, as described above, the hook part 6 is hooked on the back surface of the manhole cover 20 near the notch hole 22, and the holding part 7 presses and fixes the surface of the manhole cover 20 near the notch hole 22. , the vicinity of the notch hole 22 of the manhole cover 20 rises together with the lifting fitting 4.

After a portion of the lid 20 has been appropriately lifted in this manner, the lid 20 can be completely removed from the receiving frame 21 by an appropriate method.

Conversely, it can also be used when fitting the lid 20 into the receiving frame 21.

In addition, as shown in Figure 5, some manhole covers have an inclined surface on the back of the M2O that the hook 6 of the lifting fitting 4 touches, so in such cases, The hook portion 6 must also be shaped into an inclined surface.

As described above, the manhole cover opening device of the present invention configured as claimed in the utility model registration claims is a lifting metal fitting that hooks and fixes the end of the manhole cover by rotating the support rod with a nozzle. Since the force applied by raising the manhole cover is effectively used to lift the cover upward, the manhole cover can be opened extremely easily with a small amount of force even when the fit between the cover and the receiving frame is tight.

[Brief explanation of the drawing]

FIG. 1 is an exploded sectional view of a manhole cover opening device according to one embodiment of the present invention, and FIG. 2 is a partial sectional view of another embodiment.
FIG. 3 is a sectional view of another embodiment, FIG. 4 is an explanatory view of the use of the manhole cover opening device shown in FIG. 1, and FIG. 5 is an explanatory view of use in another case. 1...Support rod, 2...Male thread, 3...
・・・Handle, 4... Lifting bracket, 5...
...Through female screw hole, 6...Hook part, 7...
... Holding part, 10... Holding bolt, 13...
...Press stop part, 17...Press metal fitting.

Claims (1)

[Claims for Utility Model Registration] 1. A support rod 1 having a male screw 2 on its outer periphery and being rotated in a bundle, and a through female threaded hole 5 screwed into the support rod 1 for opening a manhole cover. This manhole cover opening device comprises a lifting fitting 4 provided with a hook part 6 that is hooked on the back surface near the notch hole and a holding part 7 that presses and fixes the surface of the manhole cover near the cover opening notch hole. 2. The manhole cover opening device according to claim 1, wherein the holding part 7 is a holding bolt 10 that is adjustably screwed into the lifting fitting 4. 3. The manhole cover opening device according to claim 1, wherein the holding part 7 is a holding part 13 which is detachably fixed to the lifting fitting 4. 4. The manhole cover opening device according to claim 1, wherein the holding part 7 is a holding fitting piece 17 movably disposed on the lifting fitting 4.