JPH0514239U - Manhole lifting tool - Google Patents

Abstract

(57) [Summary] [Purpose] In a manhole that has already been installed on a road, etc., when the lid needs to be raised due to new pavement, etc., it can be easily raised. [Structure] A tubular receiving frame 1 attached to the outer peripheral portion of a lid receiving frame 4 of a manhole, and a flat plate-shaped raised lid 2 fitted to the inner peripheral portion of the receiving frame 1 . Further, the fitting surface of the receiving frame 1 and the raised lid 2 is tapered.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a manhole raising tool that can easily raise an existing manhole iron lid or the like.

[0002]

[Prior Art]

 FIG. 2 is an explanatory diagram showing a cross section of a manhole installed in the ground such as on a road. The manhole is composed of a lid 3 such as an iron lid and a lid receiving frame 4 that holds the lid 3 and prevents the surrounding pavement 5 from collapsing, and communicates with the inside of a tunnel or the like provided in the road.

In such a manhole, there is a case where a road surface 52 is formed by adding new pavement to the existing road surface 51 to raise the road surface by Δh due to work such as repairing the road surface. In such a case, if the road surface 52 is paved as it is, the surface of the lid 3 will be buried in the new paving, so it is necessary to make only the portion of the lid 3 unpaved. In this case, in the manhole part, a step difference of Δh is generated between the road surface 52 and the upper surface of the lid 3 (road surface 51), which may hinder the passage of vehicles or people, or cause rattling such as so-called lid squeaking during the passage of vehicles. There was a problem that noise was generated.

In order to interpret this, as a conventional prevention method, there is a method of excavating and removing the pavement 5 around the manhole, taking out the lid receiving frame 4, adjusting the height to a new road surface 52, and returning the lid receiving frame. It was done.

[0005]

[Problems to be solved by the invention]

 In the conventional method as described above, it is necessary to largely excavate and remove the pavement around the manhole, and it is also very difficult to refill the height of the lid receiving frame 4 to match the newly paved road surface 52. There is a workability or environmental problem that it requires labor and time, and a step is formed between the road surface 52 and the upper surface of the lid 3.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a tool capable of easily and surely increasing the height of a manhole.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention comprises a tubular receiving frame attached to the outer peripheral portion of the lid receiving frame of the manhole and a flat-plate-shaped raising lid fitted to the inner peripheral portion of the receiving frame. Characterize.

[0008]

[Action]

 Since the present invention has the above-mentioned configuration, when a new pavement is to be constructed, only the pavement around the upper part of the existing manhole cover is excavated and removed, and the tubular receiving frame is installed in the existing manhole. The lid of the manhole can be effectively attached to the new paving surface by attaching it to the outer peripheral part of the lid and then attaching the flat-shaped lid.

[0009]

【Example】

 FIG. 1 is a diagram for explaining a state in which an embodiment of the present invention is installed on a pavement surface by its cross section. 1, the same reference numerals as those in FIG. 2 represent the same functional parts, 1 is a cylindrical receiving frame such as a cylinder configured to be fitted on the outer periphery of the manhole cover receiving frame 4, and 2 is the inside of the receiving frame 1. Reference numeral 6 denotes a flat plate-shaped lid that is fitted around the periphery of the manhole cover 3 to cover the upper surface thereof, and 6 is a belt-shaped stopper for fixing the receiving frame 1 to the manhole cover receiving frame 4.

The receiving frame 1 is made of a material such as metal, reinforced plastic or hard rubber. The raised lid 2 is made of a material having a vibration absorbing property such as hard rubber, and has a groove 21 formed on its surface. Further, a mating surface (fitting surface) 12 between the receiving frame 1 and the raised lid 2 is tapered. Next, the usage of this embodiment will be described by taking as an example the case where the road surface 51 is raised to the road surface 52 by pavement.

First, before a new paving work is performed, the pavement 5 around the upper part of the existing manhole cover receiving frame 4 is excavated and removed to the extent that the receiving frame 1 can be attached. In this state, the receiving frame 1 is fitted into the outer peripheral portion of the lid receiving frame 4, and is fixed by the stoppers 6 so that the upper surface of the lid receiving frame 4 substantially matches the new road surface 52. Then, the raised lid 2 is dropped onto the inner peripheral portion of the receiving frame 1 and fitted therein, thereby completing the process.

After that, a new pavement may be constructed to form the road surface 52, and the new pavement is prevented from collapsing by the outer peripheral portion of the receiving frame 1. Here, the raised lid 2 is prepared by preparing several kinds having different thicknesses according to the pavement construction, and selecting them appropriately or attaching them by combining and stacking those having different thicknesses. Various pavement thicknesses can be accommodated.

Further, since the mating surface 12 between the receiving frame 1 and the raised lid 2 has a tapered shape, the fitting between the two becomes more intimate, so that rattling and lid squeaking can be suppressed. it can. Further, since the groove 12 is formed on the surface of the raising lid 2, slip can be prevented and the degree of wear of the raising lid 2 can be easily measured.

It should be noted that the taper shape of the mating surface 12 has a great effect when it is set to about 82 ° with respect to the road surface (non-planar).

[0015]

[Effect of the device]

 As described above, according to the present invention, when it is necessary to raise the manhole cover, the existing manhole cover receiving frame of the existing manhole is not dug up and refilled again as in the conventional case. -The amount of removal can be greatly reduced, and the workability can be greatly improved by not requiring complicated height adjustment.

Further, by tapering the mating surface of the raising lid, the adhesion of the attaching of the raising lid increases, and environmental problems such as noise such as rattling and lid squeaking are significantly suppressed. There is an effect that can be done.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 1 Receiving frame 2 Lifting lid 3 Manhole cover 4 Manhole lid receiving frame 12 Lapping surface

Claims (2)

[Scope of utility model registration request] 1. A manhole comprising a tubular receiving frame attached to the outer peripheral portion of the lid receiving frame of the manhole, and a flat-plate-shaped raised lid fitted to the inner peripheral portion of the receiving frame. Lifting tool. 2. The manhole raising tool according to claim 1, wherein a mating surface between the receiving frame and the raising lid is tapered.