JP2011043035A - Manhole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manhole requiring an inclination angle as an essential requirement, but not requiring a top face width as a requirement, and in particular, not contrived in a manhole lid. <P>SOLUTION: The manhole has the manhole lid filled with asphalt, and the top face width of the manhole lid and the top face width of a manhole receiving frame are made to be smaller than 10 mm. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a manhole which is mainly installed on a road and can prevent asphalt from being peeled off due to traffic.

  2. Description of the Related Art A conventional manhole characterized in that, as a conventional technique, the wall surface on the side in contact with the pavement is directed downward in the outer receiving frame, and the inclination angle of the wall surface increases or decreases within a predetermined length along the circumferential direction of the wall surface. There is. (See Patent Document 1)

  Further, as another prior art, a manhole cover receiving frame comprising a cylindrical portion that supports a manhole cover and a flange formed at a lower peripheral portion of the cylindrical portion, wherein the cylindrical portion has an outer periphery There is a manhole cover receiving frame characterized in that the upper surface is formed of a curved surface that smoothly falls from the upper end surface toward the flange, and a plurality of circular depressions are formed on the outer peripheral upper side surface. (See Patent Document 2)

  JP 2006-200259 A   JP 2001-152474 A

  In the former, the inclination angle is an indispensable requirement, and the top width is not a requirement of the invention as in the present invention. In particular, the manhole cover is not devised.

  In the latter, the manhole cover receiving frame is formed with a plurality of circular depressions, and the manhole cover is not devised in the same way as the former.

The present invention is intended to solve the problems of such a conventional configuration, and by forming a cross-shaped asphalt anchor portion on the inner surface of the manhole cover, the adhesion area of the asphalt can be increased, Therefore, it is possible to increase the adhesive force, by reducing the width of the top surface of the manhole cover and the width of the top surface frame of the manhole receiving frame to less than 10 mm, thereby reducing the area in contact with the tire of the car as much as possible on rainy days, etc. Slip can be prevented.
Moreover, by providing the asphalt anchor portion, the asphalt can be used without peeling for a long time.
Furthermore, by making the top surface width of the asphalt anchor part less than 10 mm and making the height less than 40 mm, the adhesion to the asphalt is further improved, and a manhole that can prevent slippage on rainy days, etc. is realized. It is for the purpose.

  In order to achieve the above object, according to the present invention, in a manhole having a manhole cover filled with asphalt, the outer peripheral top surface width of the manhole cover and the top surface width of the manhole receiving frame are made less than 10 mm. In a manhole having a manhole cover filled with asphalt, a cross-shaped asphalt anchor portion is formed on the inner surface of the manhole cover. Form an asphalt anchor on the inner periphery of the manhole cover. The top surface width of the asphalt anchor part should be less than 10 mm. The height of the asphalt anchor portion is less than 40 mm. .

1) Asphalt can be firmly attached by forming a cross-beam shaped asphalt anchor portion on the inner surface of the manhole cover.
2) By setting the width of the top surface of the manhole cover and the manhole receiving frame to 10 mm or less, the area in contact with the vehicle tire can be reduced as much as possible, and an accident such as a slip can be prevented.
3) By providing the inner peripheral asphalt anchor portion, it is possible to prevent the asphalt from peeling off due to vibrations of a passing vehicle or the like.
4) By making the top surface width of the asphalt anchor portion less than 10 mm and the height less than 40 mm, the adhesion with the asphalt can be further improved, and slippage on rainy days and the like can be prevented.

  BRIEF DESCRIPTION OF THE DRAWINGS FIG.   The longitudinal cross-sectional front view of the principal part of the manhole which shows 2nd Example of this invention.   The top view of the principal part of the manhole which shows 3rd Example of this invention.   The longitudinal cross-sectional front view of the principal part of the manhole which shows 3rd Example of this invention.   The longitudinal front view of the principal part of the manhole which shows 4th Example of this invention.

First, the manhole of the first embodiment will be described.
1 is a manhole.
2 is a manhole cover filled with asphalt A, and the top surface width 2a is made less than 10 mm.
Reference numeral 3 denotes a manhole receiving frame having a top surface width 3a of less than 10 mm.
As described above, the top surface width is usually about 10 to 30 mm, but by making it less than 10 mm, slipping of tires such as cars is prevented.

Next, the manhole of the second embodiment will be described.
The manhole 21 has an asphalt anchor portion 22b formed on the inner peripheral surface in a manhole receiving frame 23 similar to the above, and can hold the inscribed asphalt C more firmly. 22a and 23a are the same as described above.

The manhole of the third embodiment will be described.
The manhole 31 is formed by forming a cross-girder-shaped asphalt anchor portion 4 on the inner surface of the lid 32 in the manhole. The height T is about 20 mm. It adheres firmly.
The top width 32a is preferably less than 10 mm.

The manhole of the fourth embodiment will be described.
The manhole 41 is formed by forming a cross-beam shaped asphalt anchor portion 44 on the inner surface of the manhole cover 42 in the same manner as described above. The manhole 41 has a height T1 of about 39 mm and a top surface width 44a of less than 10 mm. Can be firmly and independently attached to each other, and even if the upper surface is peeled off due to the passage of a car, the top surface width 44a is narrow, so that slip or the like can be prevented.

In each of the embodiments described above, the size of the manhole cover and the receiving frame may be determined as necessary, and is not particularly limited as long as each top width is less than 10 mm.
In addition, B has shown the road surface asphalt.

1 ---- Manhole 2 ---- Manhole cover 2a --- Top width 3 ---- Manhole receiving frame 3a --- Top width A ---- Asphalt B ---- Road asphalt C-- --Asphalt

Claims (5)

  A manhole having a manhole cover filled with asphalt, wherein the outer peripheral top surface width of the manhole cover and the top surface width of the manhole receiving frame are less than 10 mm.   A manhole having a manhole cover filled with asphalt, wherein a mandrel-shaped asphalt anchor portion is formed on the inner surface of the manhole cover.   The manhole according to claim 1 or 2, wherein an asphalt anchor portion is formed on the inner peripheral surface of the manhole cover.   The manhole according to claim 2 or 3, wherein the top width of the asphalt anchor portion is less than 10 mm.   5. The manhole according to claim 2, wherein the height of the asphalt anchor portion is less than 40 mm.

Images