JPH0242747Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a manhole raising tool that can raise a manhole to an arbitrary height.

When a road is re-paved, the road surface rises, so manholes must be raised accordingly. Conventionally, manhole raising tools have been used, such as the Utility Model 58-189248.
The one shown in Publication No. 1 is known. This thing is
Special plates are stacked on top of the manhole frame, and then the cover frame is placed on top of it, and then the whole thing is fixed with bolts. This board material has a very complex shape and structure, and not only is the production cost extremely high, but since the board materials of a certain thickness are stacked and used, the thickness of each board material is within the range of the thickness of one board material. Therefore, it is very difficult to raise the height so that there is always no difference in level between the road surface and the road surface.

The object of this invention is to provide a manhole raising tool that can be raised to any desired amount and can be produced at low cost.

Next, one embodiment of this invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing a construction state according to an embodiment of this invention. 1 is a manhole frame, and conditioned concrete 2 is placed on top of the manhole frame 1. Note that the conditioned concrete 2 may have lost its shine as a result of being scraped to adjust the height during road surface work that has been carried out so far.

Then, to raise the height on top of the above, three metal plates 3, 3, . . . are stacked on top of the conditioned concrete 2 at equal intervals. Adjusters A as shown in FIG. 2 are placed on each of the three metal plates 3, 3, . . . .

This adjusting tool A consists of a base 4 having a female thread cut on the inner surface of a short pipe, and an adjusting body 5 having an outer diameter that fits inside the base 4 and having a male thread cut on its outer surface. The adjusting body 5 is also made of a short pipe, and a collar 6 is formed on the outer periphery of the upper end. By adjusting the amount by which the male screw of the adjustment body 5 is screwed into the female screw of the base 4, the overall height can be adjusted. This height adjustment can then be made continuously.

On each of the three metal plates 3, 3...
After placing the adjusters A adjusted to appropriate heights, the lid holder frame 7 is placed on them. and,
When concrete is poured around the metal plates 3, 3, . . . , adjusters A, A, . Incidentally, at this time, the insides of the adjusters A, A, . . . are also filled with concrete. In Fig. 1, 8 is the lid holder frame 7.
It shows a manhole cover that fits inside. and,
When the above work is completed, the manhole cover 8 is fitted into the cover frame 7, the surrounding paving work is completed, and the traffic restriction is immediately lifted. Lid holder frame 7 and manhole cover 8
Since the concrete is firmly supported by the metal plates 3, 3, etc. and the adjusters A, A, etc., it is possible to allow passage without waiting for the concrete to solidify.

The above example shows the use of three metal plates 3 stacked one on top of the other, but the required number of metal plates 3 can be stacked according to the height of the raised area at the site, and fine adjustments can be made using the adjusters A and A.
This will be done by... The metal plate 3 may have a rectangular shape, an arc shape, or a ring shape along the manhole frame 1, but a simple rectangular shape can be obtained easily and inexpensively. The base body 4 and the adjusting body 5 of the adjusting tool A can be manufactured at low cost if they are manufactured by cutting a pipe to a certain length and then cutting a female thread or a male thread on the inner circumference or outer circumference. Also, since they are hollow, they are light and convenient to transport.

The manhole raising device according to this invention has a base 4 having a cylindrical shape and having a female thread cut on the inner periphery.
It is made up of a plurality of adjustment devices A, each having a male screw cut on its outer periphery, which can be screwed into the female screw, and a plurality of flat metal plates 3. To raise the height using the raising method, first stack an appropriate number of metal plates 3 on the manhole frame 1 or the adjustment concrete 2 on the manhole frame 1, and then place the base 4 on top of the metal plates 3 at intervals. Place. Next, adjusting bodies 5 are screwed onto the base body 4 from above while adjusting the upper surfaces thereof to appropriate heights, and the lid receiving frame 7 is placed on top of the adjusting bodies 5. Finally, concrete is poured around the metal plate 3, the adjuster A, and the lid holder frame 7, and the surrounding paving work is completed to complete the entire work.

This is extremely convenient because the traffic restrictions can be lifted immediately after the above work is completed.

In addition, according to this invention, since the amount of raising can be adjusted continuously, the height can be raised so that the upper surface of the manhole cover 8 and the pavement surface accurately match at any location. It is.

Furthermore, the device according to this invention consists of a base body 4 with a female thread cut on the inner periphery, an adjustment body 5 with a male thread cut on the outer periphery, and a flat metal plate 3, each of which has a different shape. It has a simple structure and can be manufactured at a very low cost.

In addition, when the adjustment body 5 is cylindrical,
It is light and convenient to transport.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of this invention in a state of implementation, and FIG. 2 is a perspective view of the main parts of the embodiment. 3... Metal plate, 4... Base, 5... Adjuster, A... Adjuster.

Claims (1)

[Claims for Utility Model Registration] 1. Basic cylindrical shape with internal thread cut on the inner periphery 4.
This manhole raising tool is made up of a plurality of adjustment tools A, which are made up of a plurality of adjustment tools A, and a plurality of adjustment tools A, each of which has a male thread cut on its outer periphery and which can be screwed in just after the female thread, and a plurality of flat metal plates 3. 2. The manhole raising device according to claim 1, wherein the adjusting body 5 is cylindrical.