JPH03228925A - Adjustment device for manhole cover height - Google Patents

Abstract

PURPOSE:To shorten an execution time by placing a cover frame fitted with a cover body via a conical spring on the upper edge of a cover frame bearing part formed at a work opening on the upper part of a manhole, and adjusting the top of the cover body to the height of a road surface. CONSTITUTION:After adjusting a cover frame 8 fitted with a cover body 7 to the height of a road surface 5, an inner frame 13 is provided in a gap between the uppermost structure block 4 or the upper edge 1b of the cover frame bearing part of a manhole 1, and the base 8a of the cover frame 8. The aforesaid inner frame 13 is constituted with a cylindrical elastic body 15, an annular steel belt 16, a detachable band support fitting 17 and a detachable band 18. Furthermore, a nut 12 is tightened so that the upper edge of the cover body 7 fitted to the cover frame 8 is in line with the height of the road surface 5 and the inclined surface thereof. The height of the cover body 7 is optionally adjusted, while a conical coil spring 9 is being compressed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention facilitates the adjustment work of adjusting the height of the cover of underground structures such as manholes built under the road to match the height and slope of the road surface. This invention relates to a lid height adjustment device.

[Conventional technology]

Generally, when attaching a cover body to a manhole work opening built under an existing road via a cover frame, it is necessary to adjust the cover height to match the road surface height and slope. For example, as shown in Figure 6. A road 32 is excavated in a circular or square shape around the working opening 31 formed at the top of the manhole 30, and a road 32 is formed with concrete blocks, iron pieces, etc. on the upper end surface 31a of the cover frame receiving part of the working opening 31. The height and inclination angle of the lid 35 attached to the lid frame 34 via the plurality of height adjusting members 33 are adjusted to match the road surface height. Then, remove the lid frame 34 again, and check the inside and outside of each height adjustment member 33 and each height adjustment member! , 33...
・Spread cement mortar 36 all around the space up to the height of the height adjustment member 33, and install the lid frame 34 again.
The method used was to fix it in place, finish the inner surface with a trowel, and adjust the height of the manhole 30 cover.

[Problem to be solved by the invention]

However, in the conventional lid height adjustment method described above, it is necessary to prepare a large number of height adjustment members of several different sizes, and it is necessary to select and stack the appropriate height adjustment members on site. There were problems such as the adjustment work was troublesome and took a long time.

Also, over time, the stacking position of height adjustment members etc. may shift, causing damage to the mortar around the lid, or if a deformable member such as a piece of wood is used instead of a concrete block, this may lead to destruction. there were. Furthermore, filling work of mortar to be filled around the block pieces, especially treatment of the inner circumferential side facing the neck wrapping block provided on the outer circumferential side in the gap between the cover frame and the manhole top or construction block.

There were problems such as it took a lot of time to finish.

The present invention has been proposed to address the above-mentioned problems, and when adjusting the height between the lid and the road surface, there is no need to prepare a large number of different types of height adjustment members, and the lid can be mounted easily. Supports the lid frame via a conical coil spring so that it can be adjusted up and down,
After adjusting the height of the lid frame, the specified inner frame is fixed and filled with fluid rapid hardening mortar, etc., which simplifies the work of adjusting the lid height and allows for quick construction. The object of the present invention is to provide a lid height adjustment device.

[Means to solve the problem]

In order to achieve this object, the present invention provides a plurality of implants on the upper end surface of the lid frame holder formed at the working opening of the upper part of the manhole or on the upper end surface of the construction blocks appropriately stacked on the upper end surface of the lid frame holder. The base of the lid frame with the lid attached to the stud bolt via a conical coil spring is inserted and placed on the stud bolt, and the lid frame is tightened with a nut. In a manhole cover height adjustment device that adjusts the manhole cover body to the road surface height, the road surface height of the cover frame to which the cover body is attached is adjusted by tightening a nut, and the cover frame and the top of the manhole or construction block are adjusted. In the gap between them, an inner frame installed on the inner circumference side facing the neck wrap block provided on the outer circumference side is installed with an outer diameter that is in contact with the inner circumferential wall of the lid frame and the inner wall of the working opening of the construction block. A cylindrical elastic body such as a neoprene rubber sponge that is deformable in height and thickness, an annular steel belt inserted into the inner circumferential side of the upper end of the cylindrical elastic body, and an inner circumferential surface of the steel belt. The upper end is attached to multiple locations, the lower end is attached to the band support fitting, and the lower end is supported by the hook of the band support fitting. The tension of the spring and handle provided between the overlapped ends of the inner and outer circumferential sides, which expands the lower outer circumference of the cylindrical elastic body evenly from the inner circumference by rotating the handle, is a band. It is characterized by being configured by the following.

[For production]

Based on such a configuration, according to the present invention, when adjusting the cover body of a manhole constructed under a road etc. to the road surface height, the upper end surface of the cover frame holder formed at the work opening at the upper part of the manhole. A lid frame with the lid attached via a conical coil spring is placed on the top of the lid, allowing the top surface of the lid to be adjusted to match the road surface height, so a large number of different height adjustment members are available. The lid height and inclination angle can be arbitrarily adjusted in a short time with simple operations.

In addition, after adjusting the road surface height of the lid body, filling with mortar can be made easier by simply installing a predetermined inner frame between the upper end surface of the lid frame holder and the lid frame, facing the neck wrap block. can be,
By using fluid rapid hardening mortar or resin mortar, the hardening time of the mortar can be shortened and traffic can be released early.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a cross-sectional view showing the upper structure of a manhole according to the present invention. In the figure, numeral l indicates a concrete manhole constructed under a road, etc., and 1a indicates an entrance/exit to the ground formed at the top of manhole I. 2b is the upper end surface of the lid frame receiver. 2.8.4 has a predetermined height and corresponds to the working opening 1a of the manhole 1;
8a, 4a, and these construction blocks 2, 3゜4 are stacked and used as appropriate when the height of the road surface 5 is higher than the upper end surface 1b of the cover frame holder of the manhole 1. , are adhesively fixed with an impregnated adhesive 6.

Furthermore, 7 is a cover body of the manhole 1, and 8 is a cover frame to which the cover body 7 is attached.

The lid body 7 and the lid frame 8 are made of iron or cast iron with a base 8a.
, the uppermost construction block 4 via the conical coil spring 9
It is placed directly on the upper surface of the manhole 1 or on the upper end surface 1b of the lid frame receiving part of the manhole 1, and its surroundings are fixed with fluidized rapid hardening mortar 10 or the like.

That is, in the uppermost construction block 4 or the upper end surface 1b of the cover frame receiving part of the manhole 1, stud bolts 11 are embedded in advance at at least 3 to 4 locations around the circumference, and the stud bolts 11 11 is fitted with a conical coil spring 9 whose coil diameter becomes smaller toward the top and which provides a sufficient amount of deflection.

Further, the base 8a of the lid frame 8 is provided with a bolt hole through which a stud 11 is inserted, and a nut 12 is screwed into the stud 11 that protrudes upward from the base 8a. There is. By tightening the nut I2, the road surface height and inclination angle of the lid 7 attached to the lid frame 8 can be arbitrarily and appropriately adjusted.

In this way, after adjusting the lid frame 8 to which the lid body 7 is attached to the height of the road surface 5, the gap between the upper end surface 1b of the lid frame receiving part of the uppermost construction block 4 or the manhole l and the base 8a of the lid frame 8 is The inner frame 13 is installed in the gap, and the construction blocks 2,
3. Negaki block 14 installed on the outer periphery of 4 and serving as an outer frame
A fluid rapid hardening mortar 10 or the like is filled between the two.

Here, as shown in FIG. 2, the inner frame 13 is made of deformable neoprene rubber having an outer diameter in contact with the inner circumferential wall of the lid frame 8 and the working opening 4a of the construction block 4, and a predetermined height and thickness. A cylindrical elastic body 15 such as a sponge, an annular steel belt 16 inserted into the inner circumferential side of the upper end of the cylindrical elastic body 15, and an upper end fixed to three locations on the inner circumferential surface of the steel belt 1B. , the tensioning having a hook support portion 17a whose lower end is bent inward at the bottom surface position of the cylindrical elastic body 15 is supported by the band support fitting (7), and the above tensioning is supported by the hook 17a of the band support fitting 17, The above cylindrical elastic body 1
A band 18 is used to spread the lower outer periphery of the construction block 5 evenly from the inner periphery and press it against the inner periphery of the working opening 4a of the construction block 4 or the working opening 1a of the manhole 1. In addition, a locking pin 17b is fixed to the band support fitting 17, and a hanging hook 24 equipped with a coil spring for suspending the inner frame 13 from the lid frame 8 is locked.

The above-mentioned tightening is performed by using the handle 20 of the metal fitting 19, as shown in FIGS. 4 and 5. When operated, the overlapping portions 18a and 18b are reduced by the spring 21, and the outer peripheral portion is expanded.

That is, the tightening metal fitting 19 is rotatably pivoted to a hook 22 fixed to the overlapped part 18a on the outer circumference side of the band 18 and a pin 23 fixed to the overlapped part 18b on the inner circumference side. A spring 21 is stretched between the supported handle 20, and by rotating the handle 20, the lower outer circumference of the cylindrical elastic body 15 expands, allowing the construction block 4 to be worked on. Exit 4a or manhole l
It is adapted to be crimped onto the inner circumferential surface of the working opening 1a.

In addition, when attaching the cover body 7 via the cover frame 8 to the upper end surface 1b of the cover frame receiving part that forms the working opening 1a of the manhole 1, an excavation hole that has been previously excavated in a circular or square shape on the surrounding road is used. 5a is formed, and the cover body 7 of the manhole 1
is adjusted to match the height of the road surface 5, and the cover frame 8 is fixed with fluid rapid hardening mortar 10, and then repaired by paving or the like.

Next, a description will be given of the work of raising the cover body 7 by the method for adjusting the height of the manhole cover configured as described above.

First, the road around the manhole 1 constructed under the road is excavated in a circular or square shape to expose the upper end surface 1b of the cover frame receiving part of the manhole 1. Here, if the height of the road surface 5 is higher than the upper end surface 1b of the lid frame receiver of the manhole 1, the construction blocks 2, 3, 4 are appropriately stacked on the upper end surface 1b of the lid frame receiver and applied with an impregnated adhesive 6. Fix with adhesive. Then, the conical coil spring 9 is inserted into the stud bolt 11 installed on the upper surface of the uppermost construction block 4, and the base 8a of the lid frame 8 is attached from above, and the nut is inserted from the upper part of the stud bolt 11. Screw on 12.

Next, tighten the nut 1 so that the upper end surface 1 of the lid 7 attached to the lid frame 8 matches the height and slope of the road surface 5.
2 can be adjusted arbitrarily while compressing the conical coil spring 9.

After adjusting the height of the lid 7, the inner frame 13 is installed in the gap between the construction block 4 and the base 8a of the lid frame 8, and the unfitted note block 14 serving as the outer frame is installed on the outside. The gap between the inner frame 13 and the unfitted note block 14 is filled with fluid rapid hardening mortar IO and fixed.

After the mortar 10 has hardened, the inner frame 13 is removed and the paving of the excavated hole 5a around the manhole 1 is repaired to complete the construction work. The cylindrical elastic body 15, steel belt 16, band support fitting 17, band 18, hanging hook 24, etc. that constitute the inner frame 13 can be used repeatedly.

Here, after adjusting the height of the lid frame 8 to which the lid body 7 is attached to the height of the road surface 5, when filling the gap remaining below the base 8a of the lid frame 8 with mortar, the upper part of the inner frame 13 is easily suspended and tightly attached to the inner peripheral surface of the lid frame 8 via the hanging hook 24, and the lower part is tightened by the metal fitting I9 to the inner periphery of the working opening 4a2 of the construction block 4 or the working opening 1a of the manhole I. Close to the surface,
Can be fixed.

In addition, the fluidity rapid hardening mortar 1 filled in the above-mentioned voids
By using rapid hardening mortar or resin mortar, 0 not only has a high compressive strength and 1 bending strength, but also develops strength quickly, making it possible to open to traffic quickly after construction.

〔Effect of the invention〕

As explained above, the manhole cover height adjusting device according to the present invention can be easily adjusted to any height and slope by simply tightening the adjustment nut, so a large number of height adjustment members are required. It is not necessary and can be adjusted in a short time with simple work.

Furthermore, by using the inner frame of the present invention, the inner frame can be easily attached and removed when filling mortar into the void, and can be quickly attached and detached, and the inner frame can be used many times. Economical.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing the upper structure of a manhole according to the present invention, Fig. 2 is a perspective view showing the structure of the inner frame according to the present invention, Fig. 3 is a cross-sectional view of the same, and Figs. 4 and 5 are fasteners. 6 is a sectional view showing the upper structure of a conventional manhole. ■... Manhole, la... Working opening, lb... Lid frame receiver upper end surface, 2, 8.4... Construction block, 2a,
! la, 4a...work opening, 5...road surface, 7...
Lid body, 8... Lid frame, 8a... Base, 9... Conical coil spring, IO... Fluid rapid hardening mortar, ll...
・Built bolt, 12...Nut, 13...Inner frame, 1
4... Unfit note block, 15... Cylindrical elastic body, 16
...Steel belt, 17...Tightening is by band support fitting, 18...Tightening is by band, 19...Tightening is by metal fitting,
20.../% bundle, 21...spring, 22.
...Hook, 23...Pin, 24...Hanging hook.

Claims (1)

[Scope of Claims] A plurality of stud bolts are planted on the upper end surface of a lid frame receiver formed at the working opening of the upper part of the manhole or on the upper end surface of construction blocks appropriately stacked on the upper end surface of the lid frame receiver, The base of the cover frame with the cover attached to the stud bolt via a conical coil spring is inserted and placed on the stud bolt, and the cover frame is tightened with a nut to raise the manhole cover to the road surface height. In the manhole cover height adjustment device, the height of the road surface of the cover frame to which the above-mentioned cover body is attached is adjusted by tightening a nut, and the outer circumference is adjusted in the gap between the cover frame and the manhole top or construction block. The inner frame installed on the inner circumferential side facing the root wrapping block provided on the side is deformed to have an outer diameter and a predetermined height and thickness in contact with the inner circumferential wall of the lid frame and the inner wall of the working opening of the construction block. A flexible cylindrical elastic body such as a neoprene rubber sponge, an annular steel belt inserted into the inner circumferential side of the upper end of the cylindrical elastic body, and the upper end attached to multiple locations on the inner circumferential surface of the steel belt. a tension band support fitting having a support part whose lower end supports the lower part of the tension band, and a spring and a handle supported by the hook of the tension band support fitting and provided between the ends of the overlapped parts on the inner and outer circumferential sides. A manhole cover height adjustment device comprising: a tension band that spreads the lower outer peripheral part of the cylindrical elastic body evenly from the inner peripheral surface by rotating the handle.