JP3007146U - Manhole cover level adjustment member - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a manhole cover level adjusting member capable of reducing the crushing range of a pavement surface due to the raising of the manhole. [Structure] The metal frame adapter 8 is placed on the metal frame 1 of the manhole, while the lid receiving ring 12 having a height H corresponding to the manhole height is fitted to the step portion 4 of the metal frame 1 to fit the metal frame adapter 8 The manhole is raised by fitting the lid 2 into the step portion 4a formed by the inner peripheral surface 8A and the upper surface of the lid receiving ring 12. The metal frame adapter 8 is fixed by setting a pin in a drill hole 11 provided in the rib 6 of the metal frame 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a level adjusting member for a lid to be fitted into a metal frame arranged on an upper part of an existing manhole which is buried in a road, as the manhole is raised.

[0002]

[Prior art]

 Pipes for sewer, sewage, water collection, etc. are buried in the lower part of the road, and manholes have been installed at the pipe collection points etc. due to the necessity of inspection and cleaning of these underground pipes. . As shown in FIG. 17, the manhole structure has a foundation 20A underground, and forms a space surrounded by an inclined bottom surface 21 on a bottom slab 20B laid on it, a rising wall 22, and a floor slab 23. , The side block straight walls 24A, 24B, 24C and the side block sloped wall 25 are sequentially stacked on the opening 24 provided in the floor block block 23 from the bottom, and the pavement surface 3 is exposed on the side block sloped wall 25. The metal frame 1 is arranged like this, and the lid 2 is fitted into the step portion formed inside the metal frame 1.

An upstream pipe 26A, an auxiliary pipe 26B, an invert pipe 26C, a downstream pipe 26D, and the like are connected to the side cluster side wall 22, and drainage flowing from the upstream pipe 26A, the auxiliary pipe 26B, and the invert pipe 26C is discharged into a manhole. After being collected in this space, it is discharged to the downstream pipe 26D. Note that 28 indicates a foothold frame used when entering the manhole.

FIGS. 13 and 14 show a typical manhole metal frame 1 having an inner diameter of 600 mmφ, which has a step 4 into which a lid 2 is fitted inside the metal frame 1 and a plurality of bolts at the bottom. A hole 5 is provided and a plurality of ribs 6 are provided on the outside. On the other hand, FIGS. 15 and 16 show a lid 2 fitted into the step portion 4 of the metal frame 1, and the lid 2 is provided with gas vent holes 7 generated in the manhole in an appropriate distribution. . The thickness of the lid 2 is usually 50 mm. The material of the metal frame 1 and the lid 2 is generally made of gray cast iron or spheroidal graphite cast iron for roads, and reinforced concrete is also used for sidewalks and roads with low traffic.

By the way, as shown in FIG. 18, the manhole position level becomes lower as the re-paving is repeatedly performed due to the unevenness formed by the use of the road and the ground subsidence. Therefore, when the position level of the metal frame 1 and the lid 2 of the manhole becomes lower than the pavement surface, it becomes necessary to raise the manhole from the problem of running the vehicle and the damaged surface of the lid 2.

Conventionally, when raising a manhole, as shown in FIG. 18, a spacer 27 having a height necessary for raising the manhole is provided on the upper surface of the side block oblique wall 25 and the lower surface of the metal frame 1. It was put in between and raised.

[0007]

[Problems to be solved by the device]

 In order to put the space 27 between the side wall inclined wall 25 and the metal frame 1 in order to raise the manhole as before, the asphalt or concrete forming the pavement surface 3 should be crushed into a wide area and at least the side block should be crushed. After the upper end of the slanted wall 25 is exposed, the bolt fixing the metal frame 1 is removed from the bolt hole 5. Then, after the metal frame 1 is removed from the side sloping wall 25, the spacer 27 is placed on the side sloping wall 25, and then the metal frame 1 is placed again thereon. Subsequently, the metal frame 1 is fixed with bolts, and then asphalt or concrete that has been extensively crushed is repaved.

Due to traffic conditions using roads, most of the manhole raising work is done at night, so the wider the area of asphalt and concrete crushing, the longer the crushing period with noise and the curing period after paving. . As mentioned above, since the work for raising the manhole is not easy, it is strongly desired to shorten the construction period by improving the workability of the manhole.

The present invention has been devised in view of the above circumstances, and provides a manhole cover level adjusting member capable of shortening the manhole raising work period with good workability. The purpose is.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention according to claim 1 is a level adjusting member for a lid which is fitted into a metal frame arranged on an upper part of an existing manhole buried in a road, due to the raising of the manhole. , A metal frame adapter having an inner diameter that matches the inner peripheral surface of the step portion into which the lid formed inside the metal frame is fitted is placed on the metal frame, and formed at a height corresponding to raising the manhole. The lid receiving ring is inserted into the step formed inside the metal frame, and the inner peripheral surface of the metal frame adapter and the top surface of the lid receiving ring form a step into which the lid is inserted, and the step is moved to the metal frame adapter. A lid level adjusting member for a manhole, comprising a locking means for preventing the above.

The present invention according to claim 2 is characterized in that the metal frame adapter and the lid receiving ring are integrated with each other to form a step portion into which the lid is fitted, and the lid level adjustment of the manhole according to claim 1. It is a member.

[0012]

[Action]

 A metal frame adapter having an inner diameter that matches the inner peripheral surface of the step formed inside the metal frame is placed on the metal frame, while the lid receiving ring formed at a height corresponding to the manhole is raised. Since the raised step portion is formed by inserting it into the stepped portion formed inside the frame, and the lid is fitted by the inner peripheral surface of the metal frame adapter and the upper surface of the lid receiving ring, the manhole area when raising the manhole It is possible to reduce the range of crushing the pavement surface, and it is possible to shorten the period for raising the construction. Further, since the metal frame adapter is locked to the metal frame by the locking means, it is possible to prevent the metal frame adapter from moving vertically or horizontally due to the vibration generated when a vehicle or the like passes by.

[0013]

【Example】

 FIG. 1 is a perspective view showing an embodiment of a metal frame adapter 8 according to the present invention. An inner peripheral surface 8A of the metal frame adapter 8 is an inner portion of a step portion 4 of the metal frame 1 shown in FIGS. 13 and 14. The inner diameter matches the inner diameter of the peripheral surface 1B. Further, a flange portion 9 projects outward from the outer periphery of the lower portion of the metal frame adapter 8, and a bifurcated locking portion 10 formed in a bifurcated manner from the lower surface of the flange portion 9 downward in the circumferential direction. A plurality of ribs 6 are provided so as to correspond to the ribs 6 formed on the outer periphery of the metal frame 1 shown in FIGS. 13 and 14. Further, at the lower part of these bifurcated locking portions 10, there are drilled holes 11 which pass through the bifurcated centers. The drill hole 11 may be a circular hole as shown in the drawing, but may be a long hole if necessary.

On the other hand, FIG. 2 is a perspective view showing an embodiment of the lid receiving ring 12 according to the present invention. The inner peripheral surface 12A of the lid receiving ring 12 is the inside of the metal frame 1 shown in FIG. 13 and FIG. It has the same inner diameter as the peripheral surface 1C. As shown in FIGS. 3 and 4, in order to raise the lid 2 by using the metal frame adapter 8 and the lid receiving ring 12, first, at least the asphalt or concrete paved around the metal frame 1 is crushed and at least crushed. After the metal frame 1 is exposed, the metal frame adapter 8 is aligned with the metal frame 1 and placed on it. A plurality of ribs 6 arranged on the outer circumference of the metal frame 1 are provided between the two forks of the fork engaging portion 10 arranged at equal intervals in the circumferential direction downward from the lower surface of the flange portion 9. Align them so that they are sandwiched.

Next, the metal frame adapter 8 is fixed to the metal frame 1 by inserting a bolt or a pin into the drilled hole 11 formed in the bifurcated locking portion 10 and the rib 6, and the metal frame is vibrated by the vibration generated when the vehicle is passing. It prevents the adapter 8 from moving. Then, the lid receiving ring 12 is fitted onto the step portion 4 of the metal frame 1, thereby forming the step portion 4a into which the lid 2 is fitted by the inner peripheral surface of the metal frame adapter 8 and the upper surface of the lid receiving ring 12. To do.

When the mounting of the metal frame adapter 8 and the lid receiving ring 12 on the metal frame 1 is completed in this manner, concrete winding is performed around the metal frame 1 and the metal frame adapter 8 and then the asphalt is used. Paving up to the paving surface 3a is performed, and a series of raising work is completed. Of course, the lid 2 is fitted into the stepped portion 4a after the construction is completed. The material of the metal frame adapter 8 and the lid receiving ring 12 is preferably gray cast iron or spheroidal graphite cast iron, but may be made of steel plate in some cases.

Although the metal frame adapter 8 and the lid receiving ring 12 are separate pieces in the above embodiment, when the manhole raising allowance H is 70 mm or more as shown in FIG. 5, the metal frame adapter 8 It is also possible to form an integrated metal frame adapter 13 in which the lid receiving ring 12 and the lid receiving ring 12 are integrated. In this case, the integrated metal frame adapter 13 can be integrally mounted, and the forked locking portion 10 is fixed by inserting a bolt or a pin into the drilled hole 11 of the rib 6 arranged on the metal frame 1. Is the same as in the above embodiment.

FIG. 6 is a perspective view showing another embodiment of the metal frame adapter 8 according to the present invention. The circumferential surface of the metal frame adapter 8 has a stepped portion of the metal frame 1 shown in FIGS. 13 and 14. It has the same inner diameter as the inner diameter of 4, and the flange portion 9 projects outward from the outer periphery of the lower portion of the metal frame adapter 8 as in the above-described embodiment. In this embodiment, an annular locking portion 14 is provided downward from the lower surface of the flange portion 9, and a plurality of drill holes 11 are arranged at equal intervals on the circumference thereof. The drill hole 11 may be a long hole 11a that is cut out as shown in FIG. The lid receiving ring 12 has the same shape as that of the embodiment shown in FIG.

In the present embodiment, the inner peripheral surface 10A of the annular locking portion 14 provided downward from the flange portion 9 of the metal frame adapter 8 is opposed to the outer peripheral surface 1A of the upper end portion of the metal frame 1 (see FIG. 14). It is placed so that it fits in from the outside. A female screw 15 is provided on the outer peripheral surface 1A of the upper end portion of the metal frame 1 so as to correspond to the drill hole 11 provided in the annular locking portion 14 of the metal frame adapter 8. After the female screw 15 and the drill hole 11 are aligned with each other, a screw 16 is inserted into the drill hole 11 and screwed into the female screw 15, whereby the metal frame adapter 8 is fixed to the metal frame 1. The other structure and operation are similar to those shown in FIGS.

As shown in FIG. 9, in addition to providing a drill hole 11 in the annular locking portion 14 of the metal frame adapter 8, a drill hole 11 A is provided in the upper end of the metal frame 1 and a drill hole 11 B in the lid receiving ring 12. Alternatively, the metal frame adapter 8 and the lid receiving ring 12 can be fixed to the metal frame 1 by inserting the bolts 17 into the drill holes 11, 11A and 11B and tightening the nuts 18. In this case as well, if the raising allowance H is 70 mm or more, the integrated metal frame adapter 13 in which the metal frame adapter 8 and the lid receiving ring 12 are integrated as shown in FIG. 10 can be formed. It is similar to the case shown in FIG.

FIG. 11 is a perspective view showing another embodiment of the integrated metal frame adapter 13 according to the present invention, in which a female screw 13 A is engraved on the circumferential surface of the stepped portion 4 a of the integrated metal frame adapter 13. At the same time, a male screw 19A is engraved on the outer peripheral surface of the downward stepped portion 19 provided outside the lower portion of the metal frame adapter 8. Then, the male screw 19A engraved on the downward step portion 19 of the metal frame adapter 1 is screwed into the female screw 15A engraved on the step portion 4 of the metal frame 1 so that the metal frame adapter 8 is locked to the metal frame 1. Has become. In this case, the height H can be adjusted steplessly by selecting the screwing rotation angle. The lid 2 is fastened by screwing a male screw (not shown) engraved on the outer periphery of the lid 2 into the female screw 13A engraved on the metal frame adapter 8. In this case, it goes without saying that the lid 2 can be placed instead of screwed.

In FIG. 11, the case of the integral type metal frame adapter 13 has been described, but this screw method is also applicable to two pieces which are divided into the metal frame adapter 8 and the lid receiving ring 12. As a means for locking the metal frame adapter 8, an adhesive agent such as iron cement or resin may be used to bond the metal frame adapter 8 to the contact surface with the metal frame 1 so as to be integrated.

[0023]

[Effect of device]

 As described above, according to the present invention, when the existing manhole buried in the road is raised, the inner diameter of the stepped part formed inside the metal frame arranged at the upper end of the manhole matches the inner diameter of the stepped part. Place the metal frame adapter having the above on the metal frame. On the other hand, a lid receiving ring formed at a height corresponding to the height of the manhole is fitted into a step formed inside the metal frame, and the lid is fitted by the inner peripheral surface of the metal frame adapter and the upper surface of the lid receiving ring. Since the raised steps are formed, it is possible to significantly reduce the width and depth range of the paved surface around the manhole when raising the manhole, and it is possible to improve workability. As a result, it is possible to shorten the period for raising the construction work.

Further, since the metal frame adapter is locked to the metal frame, it is possible to prevent the metal frame adapter from moving in the vertical direction, the horizontal direction or the like and being displaced by the vibration generated when the vehicle or the like passes near the manhole. In addition to improving safety, the life of the metal frame adapter and lid can be extended.

[Brief description of drawings]

FIG. 1 is a perspective view showing a metal frame adapter according to the present invention.

FIG. 2 is a perspective view showing a lid receiving ring according to the present invention.

FIG. 3 is a sectional view showing a state in which the metal frame adapter and the lid receiving ring according to the present invention are mounted on the metal frame.

FIG. 4 is a front view showing an arrow AA in FIG.

FIG. 5 is a sectional view showing an integrated metal frame adapter according to the present invention.

FIG. 6 is a perspective view showing another lid receiving ring according to the present invention in a partially broken section.

7 is a partial perspective view showing a modified example of the drill hole in FIG.

FIG. 8 is a cross-sectional view showing a state in which a metal frame adapter and a lid receiving ring according to another aspect of the present invention are mounted on the metal frame.

9 is a cross-sectional view showing a modified example of the locking means in FIG.

FIG. 10 is a cross-sectional view showing another integrated metal frame adapter according to the present invention.

FIG. 11 is a perspective view showing another embodiment of an integrated metal frame adapter according to the present invention.

FIG. 12 is a cross-sectional view showing a state where an integrated type metal frame adapter according to another aspect of the present invention is attached to a metal frame.

FIG. 13 is a plan view showing a general manhole metal frame.

14 is a cross-sectional view taken along the line AA of FIG.

FIG. 15 is a plan view showing a general manhole cover.

16 is a cross-sectional view showing an arrow AA in FIG.

FIG. 17 is a cross-sectional view showing an example of a general manhole structure.

FIG. 18 is a cross-sectional view showing a conventional manhole raising state.

[Explanation of symbols]

 1 Metal Frame 2 Lid 3 Pavement Surface 4 Step 5 Bolt Hole 6 Rib 7 Gas Vent 8 Metal Frame Adapter 9 Flange 10 Forked Locking Member 11 Drill Hole 12 Lid Support Ring 13 Integrated Metal Frame Adapter 14 Annular Locking Member 15 Female thread 16 Screw 17 Bolt 18 Nut 19 Step

Claims (2)

[Scope of utility model registration request] 1. A level adjusting member for a lid to be fitted into a metal frame arranged at an upper part of an existing manhole which is buried in a road when the manhole is raised, and a lid formed inside the metal frame is fitted. A metal frame adapter having an inner diameter that matches the inner peripheral surface of the stepped portion is placed on the metal frame, while a lid receiving ring formed at a height corresponding to the height of the manhole is formed inside the metal frame. A step portion which is fitted into the step portion and into which the lid is fitted is formed by the inner peripheral surface of the metal frame adapter and the upper surface of the lid receiving ring, and the metal frame adapter is provided with a locking means for preventing movement. A manhole cover level adjustment member. 2. The manhole cover level adjusting member according to claim 1, wherein the metal frame adapter and the cover receiving ring are integrated to form a step portion into which the cover is fitted.