JPH1060932A - Manhole cover receiver frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the raising work by providing a base flange at an intermediate part of the outside, and providing a cover receiver body to be elevated by a bolt for jacking inside an outer cylindrical body, which is provided with a fitting part, in which a receiver seat and the bolt for backing are screwed with each other, in a lower part of the inside. SOLUTION: A base flange 1 is provided at an intermediate part of the outside of an outer cylindrical body A, and a lower part of the inside thereof is provided with a fitting part 4, in which a receiver seat 2 and a bolt 3 for jacking are screwed with each other. The bolt 3 for jacking is inserted into a loose hole 6 of a projecting part 5, which is provided in a cover receiver frame B, from over, and a stopper 7 using nut is fixed by a stop ring 8 so that it can not be moved on the bolt 3 for jacking. In the case of positioning, raising or lowering, since the cover receiver body B can be easily elevated in relation to the outer cylindrical body A by turning the bolt 3 for jacking, the working time can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole cover receiving frame for an underground structure such as a manhole for water supply and sewerage and a manhole structure for a fire hydrant.

[0002]

2. Description of the Related Art Conventional underground structures such as manhole covers for water supply and sewerage are provided with a flange for attachment to the manhole side mass, so that when a step is formed between the road surface and the upper surface of the manhole cover receiving frame, the work is carried out. The work of inserting or removing or replacing the raised raising ring between the manhole side lump and the manhole cover receiving frame is not only troublesome, but also requires a lot of construction days.

[0003] That is, when raising or lowering the manhole cover receiving frame, first shut off traffic.

(A) Existing pavement cutting work

(B) Overhaul work of existing pavement

(C) Excavation work

(D) Removal of lid receiving frame

(E) Adjustment ring installation

(F) Installation of lid receiving frame

(G) Roadbed irregularity adjustment

(H) Roadbed compaction

(I) Temporary pavement

(J) After that, since the construction of the main pavement and the like must be performed sequentially, it takes time and work days, and thus the construction cost is a problem.

[0014] Therefore, on a road with a large traffic volume, traffic congestion occurs for several days due to the raising or lowering work, and it has been desired to develop a method of simplifying the raising or lowering work.

Further, in order to adjust the upper surface of the manhole cover to the road surface, the work of putting mortar between the manhole-side lump or the adjustment ring placed thereon and the base flange is performed, but this is an operation requiring extra extra work. It has been desired to develop a structure and means capable of performing this adjustment work in a short time.

In a cold region, the manhole cover cannot be opened due to freezing in the winter season, so that there has been a problem with the measures.

[0017]

Therefore, according to the present invention, there is provided a method of raising or lowering the height as in the prior art without having to dig a large area around the manhole cover receiving frame, that is, raising and lowering the work in a short time. It is possible to finish the installation, and it is also possible to easily perform the adjustment work of the manhole cover receiving frame, and when using in cold regions, lower the position of the manhole cover below the road surface in winter and put a heat insulating material in the recess An object of the present invention is to provide a manhole cover receiving frame capable of preventing freezing.

[0018]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a base flange provided in the middle of the outside, and a receiving seat and a screw rod for jack screwed into the inside lower part. A manhole cover receiving frame, wherein a cover receiving frame B which is raised and lowered by the jack screw rod is provided in an outer cylindrical body A provided with a number of mounting portions so as to be able to move up and down.

[0019]

When the screw rod for jack is rotated, the lid receiving frame rises, so that the upper surface of the manhole lid can be easily made to coincide with the road surface. Therefore, the troublesome and time-consuming adjustment work of laying a mortar between the base flange and the manhole-side lump or the adjustment ring as in the related art is omitted, which is effective for labor saving of the manhole cover receiving frame installation work.

Further, when the jack screw rod is rotated, the lid receiving frame can be easily raised or lowered without cutting the surrounding pavement, so that the so-called raising and lowering work can be completed in a short time. It is possible to provide a manhole cover receiving frame capable of increasing the height of the raised manhole.

Further, by making the engagement between the outer cylinder A and the lid receiving frame B loose, the inclination angle can be adjusted by adjusting the jack screw rod.

Further, when used in cold regions, in winter,
By lowering the lid receiving frame B, that is, the upper surface of the manhole cover below the road surface, and putting a heat insulating material in the concave portion, the manhole cover can be prevented from freezing.

[0023]

FIG. 1 shows an embodiment of the present invention. In FIG. 1A, a base flange 1 is provided in the middle of the outer side, and a receiving seat 2 and a jack bolt 3 are screwed into a lower part on the inner side. An outer cylinder body provided with a number of mounting portions 4, B is a lid receiving frame body which is inserted into the outer cylindrical body A so as to be able to move up and down, and the jack bolt 3 is provided in a fool hole 6 of a projection 5 provided on the lid receiving frame body B. The stopper 7 using a nut is inserted from above, and the stopper 7 using a nut is stopped by the stop rings 8 and 8 so as not to move on the jack bolt 3. When the jack bolt 3 is rotated, the lid receiving frame B moves up and down. The outer diameter of the lid receiving frame B is slightly smaller than the inner diameter of the outer cylindrical body A so that the lid receiving frame B can be inclined.
Reference numerals 9 and 9 denote adjustment spacers inserted between the lid receiving frame B and the receiving seat 2.

The use and features of the embodiment shown in FIG. 1 will be described below with reference to FIG. 2 while comparing differences and advantages with the prior art.

FIGS. 2A and 2B are comparison diagrams in the case where a manhole cover receiving frame is installed. FIG. 2A shows the case of the conventional product, and FIG. 2B shows the case of the present invention shown in FIG.

The height of the manhole cover receiving frame is set to 110 cm according to the JIS standard. When the conventional product 10 is installed, the adjusting ring 13 is placed on the manhole side mass 12,
Normally, the upper surface of the manhole cover receiving frame 10 has a road surface G. L. Therefore, the mortar is laid between the base flange 11 and the adjustment ring 13 so as to coincide with each other, and paving is performed after the mortar is hardened.
Was a very cumbersome operation.

On the other hand, according to the present invention, the jack bolt 3 is rotated to raise the lid receiving frame B as shown in FIG. L.
It is not necessary to wait until the mortar is hardened as in the prior art, so that the installation work can be sped up.

In addition, in the case of raising and lowering the height, in the conventional product, since the manhole cover receiving frame 10 having the base flange must be once removed, it takes much time and effort as described above.

However, according to the present invention, the lid receiving frame B can be easily moved up and down without removing the surrounding pavement by rotating the jack bolt 3 as in the case of installation. Work can be completed in a matter of hours, just a few hours.

As the spacer, like the conventional spacer inserted between the manhole cover receiving frame and the adjusting ring, there are prepared several kinds of spacers having different thicknesses without a taper and with a taper, and selectively use them. When the raising adjustment is completed, the jack bolt 3 is tightened to fix the lid receiving frame A.

The thickness of the required mortar layer 14 is 0 to 49 mm in the experience so far, and it is practically sufficient if the height from the mounting position of the base flange 1 to the seat 2 is 50 mm.

As can be easily understood from FIG. 1 or FIG. 2 (b), the adjusting spacers 9, 9 are removed and the lid receiving frame B is removed.
Is lowered, the upper surface of the manhole cover becomes the road surface G. L. Since a concave portion is formed further down, if a heat insulating material is put into the concave portion, the manhole cover can be prevented from freezing, and it is particularly suitable as a manhole cover receiving frame for snowy countries. In this case, if a large depth of the concave portion is required, the depth from the base flange 1 to the receiving seat 2 may be increased.

In the embodiment, the nut 7 is used as a stopper, and the upper and lower portions thereof are not moved in the axial direction by the stop rings 8. However, the nut 7 may be stopped by a stop pin such as a split pin. It may be.

Next, the procedure for adjusting the inclination angle will be described. The procedure is the same as the above-mentioned raising and lowering work. In this case, the upper surface of the lid receiving frame B, that is, the upper surface of the manhole cover coincides with the inclination of the road surface. It is sufficient to operate the jack bolts 3 provided at several places in such a manner as to perform the above.

FIG. 3 shows a different embodiment. In this case, a jack bolt 15 is screwed into the mounting portion 4 of the outer cylinder A from below, and a stud hole is formed in the projection 5 of the lid receiving frame B. 16 and the jack bolt 15 is inserted through the stupid hole 16.
And the lid receiving frame B is fixed by a stop bolt 17 screwed into the frame.

This structure has a locking bolt 17 before paving.
Is removed, and the lid receiving frame B can be raised or lowered by rotating the jack bolt 15. After paving, the lid receiving frame B cannot be lowered by turning the jack bolt 15. Therefore, the descending after paving is performed by pushing down by the jack device separately filed.

[0037]

As described above, in the manhole cover receiving frame according to the present invention, the height adjustment and the inclination angle adjustment can be performed from the top by operating the jack screw rod, that is, the jack bolt 3, and the jack bolt. Since the operation can be easily performed from the bottom by the operation of No. 15, there is an effect that the adjustment at the time of mounting, raising the height, lowering the work and adjusting the inclination angle can be shortened in a manner inconceivable with the conventional technology, and the height of the raising can be made large. Advantages as well as lowering the lid receiving frame B so that the manhole lid can be removed from the road surface G.
L. By lowering the temperature and putting a heat insulating material in the concave portion formed therein, it is possible to prevent the freezing of the manhole cover.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention.

FIG. 2 is a comparison diagram between an embodiment of the present invention and a conventional product.

FIG. 3 is a longitudinal sectional view of another embodiment of the present invention.

FIG. 4

[Explanation of symbols]

 Reference Signs List A outer cylinder B lid receiving frame body 1 base flange 2 seat 3 jack bolt 4 mounting portion 5 protrusion 6 stump hole 7 stopper 8 stop ring 9 adjusting spacer 10 manhole cover receiving frame 11 base flange 12 manhole side lump 13 adjusting ring 14 Mortar layer 15 Jack bolt 16 Stupid hole 17 Lock bolt

Claims (1)

[Claims] 1. An outer cylinder A provided with a base flange in the middle of the outer side and an appropriate number of mounting portions in which a receiving seat and a screw rod for a jack are screwed in a lower part on the inner side. A manhole cover receiving frame, wherein a cover receiving frame B to be moved up and down is provided so as to be able to move up and down.