JP4030039B2 - Receiving frame for lid for underground structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a receiving frame for a lid for an underground structure.
As used herein, “underground structure lid” refers to a large iron lid, a manhole lid, a sewage culm lid, an electric / Openable and closable joint gutter lids, power transmission iron lids, power distribution iron lids, buried underground pipes in waterworks and gas pipes, and their associated equipment to protect underground facilities equipment and underground cables in communications A fire hydrant lid, a water control valve lid, a gate valve lid, an air valve lid, a gas pipe lid, a water meter lid, etc., that function as an open / close door.
[0002]
[Prior art]
An upper part of an underground structure such as a manhole is provided with a cover for the underground structure consisting of a lid body and a receiving frame that supports the cover, so that the opening through the ground and the interior of the underground structure can be opened and closed. It has been. Conventionally, when this underground structure lid is installed on a road or the like, a level adjustment device for the receiving frame is interposed between the upper part of the underground structure and the lower surface of the receiving frame so that the road surface and the upper end of the receiving frame coincide with each other. However, even when the road is re-paved, it is necessary to adjust the level again according to the re-paved road surface. Japanese Patent No. 2979389 discloses that the level adjustment work of the receiving frame in this case is facilitated and various members constituting the level adjustment device can be reused.
[0003]
This underground structure lid is fitted with a protective sleeve inserted into the fixing bolt planted on the top of the side block, and the level adjusting block is screwed onto the fixing bolt, and the level adjusting block is covered with the protective block, and is attached to the flange of the receiving frame. The fixing bolt is inserted into the opened bolt hole, the flange of the receiving frame is placed on the level adjustment block, the fixing member is screwed onto the fixing bolt from the upper side of the flange of the receiving frame, the receiving frame is fastened, and the protective cap is attached to the fixing member It is the structure which covered. As a result, the fixing bolt is covered by the protective sleeve, the level adjustment block is covered by the protective block, and the fixing member is covered by the protective cap. After the construction, various members such as the fixing bolt, the level adjusting block, and the fixing member are attached to the lower surface of the receiving frame. It is possible to prevent the direct contact with a filler such as mortar filled between the slab and the side block, and to reuse the above members when the level of the receiving frame needs to be adjusted again.
[0004]
[Problems to be solved by the invention]
However, the above-mentioned lid for an underground structure once the receiving frame is installed on a road or the like, and when the level of the receiving frame is adjusted again, the upper part of the flange of the receiving frame is rolled by a pavement material such as asphalt. In order to adjust the level of the receiving frame, it was necessary to excavate this part, which was a laborious work.
[0005]
The present invention has been made in view of the above points.After the receiving frame is once installed on a road or the like, the level of the receiving frame is adjusted without excavating the pavement around the receiving frame when the receiving frame is adjusted again. An object of the present invention is to provide a receiving frame for a lid for an underground structure that can be performed.
[0006]
[Means for Solving the Problems]
The present invention is installed in the upper part of an underground structure, and is arranged so as to be detachable on the outer periphery of the receiving frame main body, which supports the lid main body on the ground surface, and surrounds the flange upper surface and the outer peripheral surface of the receiving frame main body. A protective frame, and on the upper surface of the flange of the receiving frame main body, the protective frame is supported so as to be movable up and down, and is provided with an elevating support means for detaching the protective frame upward from the receiving frame main body. The lid body has an upper surface wall that extends annularly in parallel with the ground surface, and an outer peripheral wall that extends in a cylindrical shape from the outer periphery of the flange of the receiving frame body to the ground surface.
Further, the receiving frame for the underground structure provided by the present invention is installed on the upper part of the underground structure, supports the lid body on the ground surface, and has a receiving frame body having a flange at the lower end, and the underground structure. A fixing bolt that is vertically planted at the top of the frame and passes through a bolt hole that is opened in the flange of the receiving frame body, and a level adjustment block that is screwed into the fixing bolt and can be moved up and down with respect to the fixing bolt. The level adjustment block supports the flange of the receiving frame main body from below, and is arranged on the outer periphery of the receiving frame main body, level adjustment means for adjusting the installation level of the receiving frame main body by moving the level adjustment block up and down. A protective frame that surrounds the receiving frame main body so as to cover the upper part of the flange; and the protective frame is supported to be movable up and down with respect to the flange of the receiving frame main body, Elevating and lowering support means for allowing the protective frame to be detached from the frame main body upward, and the protective frame includes an upper surface wall extending in an annular shape with the periphery of the lid main body parallel to the ground surface, and the receiving frame And an outer peripheral wall extending in a cylindrical shape from the outer periphery of the flange of the main body to the ground surface.
[0007]
By setting it as said structure, after installation to a road etc., the upper direction of the flange of a receiving frame main body is covered with a protective frame, and it will be in the state which is not rolled by pavement materials, such as asphalt. Therefore, when adjusting the level of re-receiving frame raises the protective frame by lifting the support means perform edge cutting of the outer peripheral wall of the protective frame and the paving material of the surrounding, Ri by the removing the subsequent protective frame , it is possible to adjust the level of the receiving frame using interposed a level adjusting means between the upper part of the lower surface and underground structures received frame main body. Thereby, when adjusting the level of the receiving frame, it is not necessary to excavate the pavement material around the receiving frame, and the working time can be greatly shortened.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the elevating support means extends upward from the upper surface of the flange of the receiving frame body, and is screwed into the support bolts and a plurality of support bolts provided at intervals in the circumferential direction. A special nut that supports the upper surface wall of the protective frame from below, and an opening that is formed in the upper surface wall at a position corresponding to each of the support bolts and that allows the special nut to rotate from above. It is preferable to do so.
[0009]
By adopting such a configuration, when removing the protective frame from the receiving frame main body, the removing operation can be performed from the upper side of the protective frame, and the work load is reduced.
Alternatively, the elevating support means is screwed into the support nuts and a plurality of support nuts provided on the upper surface of the flange of the receiving frame body at intervals in the circumferential direction, and supports the upper surface wall of the protective frame from below. And a special bolt that is formed on the upper surface wall at a position corresponding to each support nut, and an opening that allows the special bolt to rotate from above.
[0010]
By adopting such a configuration, when removing the protective frame from the receiving frame main body as described above, the removal work can be performed from the upper side of the protective frame, and the work load is reduced.
The elevating support means includes a fluid pressure drive mechanism that raises and lowers the protection frame by fluid pressure, and a fluid supply / discharge means that enables the hydraulic pressure drive mechanism to supply and discharge the working fluid from outside the protection frame. Can also be included.
[0011]
By adopting such a configuration, the protective frame can be removed more easily.
In the present invention, the protective frame may be composed of a plurality of blocks divided in the circumferential direction.
With this configuration, the protective frame can be removed by a minimum number of people, and the protective frame can be easily transported.
[0012]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
1 is a partial plan view showing a state in which a lid body is installed on a receiving frame of a cover for an underground structure according to the present invention, FIG. 2 is a sectional view of the receiving frame in FIG. 1, and FIG. 3 is an exploded view of the receiving frame in FIG. It is a perspective view.
[0013]
As shown in FIG. 1, the underground structure lid 1 includes a receiving frame 2 and a lid main body 3 supported by the receiving frame 2, and the receiving frame 2 is further fitted with the lid main body 3 by taper fitting. The receiving frame main body 4 and the protective frame 5 detachably disposed on the outer periphery of the receiving frame main body 4 are configured. Although only a part thereof is shown in FIG. 1, the underground structure lid 1 has a circular shape in plan view as a whole, and the lid body 3 is installed so as to be flush with the ground surface GL.
[0014]
The first embodiment of the present invention will be described below.
As shown in FIG. 2, the receiving frame main body 4 has a flange 6 formed at the lower end, and this flange 6 is fixed to the upper part of the underground structure via a known level adjusting means (not shown). As shown in FIG. 3, the flange 6 has a plurality of bolt holes 8 provided at equal intervals in the circumferential direction, and a level adjusting means is provided through these bolt holes 8. The level adjusting means, such as those similar to the fixing bolt 10 described in Japanese Patent No. 2979389 publication mentioned above, as shown in FIG. 4, the fixed block 12, lock nut 14, the anti-rotation cap 16, element level adjustment block 17 (see FIG. 8) can be used. A level adjustment block 17 is screwed to the fixing bolt 10 below the flange 6, and the level adjustment block 17 supports the flange 6 of the receiving frame body 4 from below. And the installation level of the receiving frame main body 4 can be adjusted by screwing the level adjustment block 17 with respect to the fixing bolt 10.
[0015]
Above the flange 6, the fixing block 12 is attached to the fixing bolt 10, the fixing nut 14 is tightened from above, and the anti-rotation cap 16 is further attached, so that the receiving frame body 4 is fastened from above. ing.
As shown in FIG. 2, the receiving frame main body 4 has a support portion 18 on its inner periphery, and the lid main body 3 is fitted and supported by the support portion 18. The protective frame 5 is detachably fitted to the outer periphery of the receiving frame main body 4 and covers the upper surface and the outer peripheral surface 19 of the flange 6 in this state. Specifically, the protective frame 5 has an upper surface wall 20 and an outer peripheral wall 22, of which the upper surface wall 20 is formed parallel to the ground surface GL and extends around the lid body 3 in an annular shape. On the other hand, the outer peripheral wall 22 is formed in parallel with the outer peripheral surface 19 of the receiving frame body 4 and rises in a cylindrical shape from the outer periphery of the flange 6 toward the ground surface GL.
[0016]
On the upper surface of the flange 6, a ridge 24 extending in the radial direction from the outer peripheral surface 19 of the receiving frame body 4 is formed, and a bolt hole 26 is formed in the ridge 24. As shown in FIG. 3, the protrusions 24 are provided at a plurality of locations on the upper surface of the flange 6 at a constant interval in the circumferential direction, and there are a total of 6 locations in this embodiment.
As shown in FIGS. 2 and 3, the protective frame 5 is attached to the upper surface of the flange 6 via support bolts 28 and special nuts 30 as lifting support means, and the support bolts 28 are bolt holes from below the flange 6. 26 is inserted. A concave portion 32 that can receive the head portion of the support bolt 28 is formed in the ridge 24, and the head portion of the support bolt 28 is restricted in rotation in the concave portion 32. The support bolt 28 is fastened by a nut 34 on the upper surface of the flange 6.
[0017]
The special nut 30 has a cylindrical main body portion 36, and an internal thread is formed on the inner peripheral surface thereof. The main body portion 36 is screwed onto the support bolt 28 from above the flange 6, and its lower end is located slightly above the nut 34. The special nut 30 has a support flange 38 integrally formed at the upper end of the main body portion 36, and the support flange 38 forms a disk shape around a female screw formed on the inner peripheral surface of the main body portion 36. Yes. Further, a hexagon nut 40 is integrally formed on the upper surface of the support flange 38.
[0018]
As shown in FIGS. 2 and 3, the upper surface wall 20 of the protective frame 5 is formed with a recess 42 corresponding to the position of each support bolt 28. An opening 44 is formed at the bottom of each recess 42, and a washer 46 is fitted in each recess 42 so as to cover the opening 44. Bolts 48 are inserted from above the respective washers 46, and each bolt 48 is screwed into the hexagon nut portion 40 of the corresponding special nut 30.
[0019]
When the receiving frame 2 is in a normal installation state, as shown in FIG. 2, each bolt 48 is screwed into the special nut 30, and in this state, the bolt 48 attaches the upper surface wall 20 to the support flange 38 via the washer 46. Tightened. Therefore, the bottom of the recess 42 is a tight seat for the bolt 48.
According to the above configuration, the protective frame 5 functions to dam the outside of the outer peripheral wall 22 and prevent the upper surface region of the flange 6 from being pressed by a pavement material such as asphalt. As a result, when the volume of the receiving frame 2 is adjusted in road re-paving work, etc., as the level adjusting means such as the fixing bolt 10 and the fixing nut 14 described above, as well as the lifting support means such as the supporting bolt 28 and the special nut 30. The used members can be reused.
[0020]
Furthermore, since the outer peripheral wall 22 of the protective frame 5 is configured to rise in a cylindrical shape from the outer periphery of the flange 6 toward the ground surface GL, when the road surface is re-paved after adjusting the bulk of the receiving frame 2, The rolling work of paving material becomes easy.
Next, a procedure for re-paving the ground surface GL around the receiving frame 2 and raising the receiving frame 2 according to the re-paved ground surface GL will be described.
[0021]
First, as shown in FIG. 4, the bolt 48 is unfastened and removed from the special nut 30. Next, the washer 46 is removed from the recess 42 as shown in FIG. As a result, the opening 44 is exposed above the protective frame 5, and the special nut 30 can be accessed through the opening 44. These operations are carried out for all six bolts 48 and washers 46.
[0022]
Next, as shown in FIG. 6, a tool (here, a T-shaped wrench) 50 is engaged with the hexagonal nut portion 40 through the opening 44, and the special nut 30 is rotated by turning the tool 50. At this time, when the special nut 30 is screwed upward, the upper surface wall 20 is lifted via the support flange 38 and the protective frame 5 is raised. The rotating operation of the special nut 30 may be performed at a plurality of locations at the same time or sequentially one by one.
[0023]
The edge cutting between the outer peripheral wall 22 of the protective frame 5 and the surrounding pavement material is performed by the rotation operation of the special nut 30 described above. Thereafter, as shown in FIG. 7, the protective frame 5 is lifted upward and detached from the receiving frame main body 4.
When the protective frame 5 is detached, the level of the receiving frame main body 4 is adjusted using the level adjusting means as shown in FIG. After the level adjustment, the gap formed between the lower surface of the flange 6 and the upper surface of the underground structure 7 is filled with a filler, and the protective frame 5 is attached to the receiving frame body 4 as shown in FIG.
[0024]
After mounting the protective frame 5, the special nut 30 is rotated again to lower the protective frame 5 and closely contact the receiving frame body 4. Then, the washer 46 is fitted into each concave portion 42, and the bolt 48 is screwed into the special nut 30 to fasten the protective frame 5 to the receiving frame main body 4.
As apparent from the above raising procedure, in the raising work of the receiving frame 2 according to the present invention, the work of excavating the surrounding pavement material that was necessary in the conventional raising work is unnecessary. Can be greatly shortened.
[0025]
Next, a second embodiment of the present invention will be described. In addition, the same code | symbol as already mentioned is attached | subjected to the thing similar to 1st Example, and the overlapping description is abbreviate | omitted here.
As shown in FIG. 10, in the second embodiment, the protective frame is divided into three blocks 5a, 5b and 5c. The individual blocks 5a, 5b, and 5c are obtained by dividing the integrally formed protective frame 5 described in the first embodiment into three in the circumferential direction, and both ends are partitioned by a bulkhead 52. Each block 5a, 5b, 5c has an upper surface wall 20a, 20b, 20c forming a part of a circular ring and outer peripheral walls 22a, 22b, 22c forming a part of a cylinder, respectively, and all the blocks 5a, 5b. , 5c can be mounted on the receiving frame body 4 to obtain substantially the same outer shape as in the first embodiment.
[0026]
The individual blocks 5a, 5b, 5c are fastened to the receiving frame body 4 via two sets of lifting support means, that is, support bolts 28 and special nuts 30. In the case of the second embodiment, since the individual blocks 5a, 5b, and 5c can be detached independently, it is not necessary to remove all the protective frames as a whole, so that the burden on the worker is reduced.
[0027]
Next, a third embodiment of the present invention will be described. Also here, the same components as those in the first embodiment are denoted by the same reference numerals as those described above, and redundant description is omitted.
As shown in FIG. 11, in the third embodiment, three telescopic jacks 54 are arranged on the flange 6 of the receiving frame body 4 as a fluid pressure drive mechanism. These three telescopic jacks 54 are arranged on the upper surface of the flange 6 at equal intervals in the circumferential direction, and are connected to each other via a hydraulic line 56.
[0028]
As shown in FIG. 12, the hydraulic pipe line 56 is piped in a ring shape along the outer peripheral surface 19 of the receiving frame body 4, and is connected to the hydraulic distributor 58 at one location. The hydraulic distributor 58 has a supply / discharge port 60 on the upper side, and a hydraulic hose 64 can be attached / detached through a connector 62. The hydraulic hose 64 can be inserted from the outside through the opening 66 of the protective frame 5, whereby hydraulic oil as a working fluid can be supplied to and discharged from each of the telescopic jacks 54 from a portable hydraulic pump 68 installed outside. is there.
[0029]
Each telescopic jack 54 has its upper end connected to the protective frame 5 via a bolt 70. Further, the upper surface wall 20 of the protective frame 5 is formed with a recess 72 at a position corresponding to each telescopic jack 54, and a bolt hole 74 is formed in the recess 72 as shown in FIG. Bolts 70 are screwed into the actuators of the telescopic jacks 54 through the bolt holes 74 and are tightly coupled to the upper surface wall 20 of the protective frame 5.
[0030]
In the case of the third embodiment, the protective frame 5 can be easily lifted and lowered simply by supplying and discharging the hydraulic oil to and from the telescopic jack 54 from the outside, and the edge cutting operation of the protective frame 5 described above can be performed more easily. .
The present invention is not limited to the above-described embodiments, and can be implemented with various additions and modifications. For example, in the first embodiment, a thrust bearing can be disposed on the support flange 38 of the special nut 30 to reduce the friction with the protective frame 5 during the rotating operation.
[0031]
Further, in the first embodiment, the support bolt 28 extending upward from the upper surface of the flange 6 and the special nut 30 screwed into the support bolt 28 are mentioned, but the upper and lower arrangement relationship of these both members can be interchanged. . For example, a support nut can be fixed upward on the upper surface of the flange 6 and a special bolt can be screwed into the female screw formed on the inner peripheral surface from above. In this case, a plurality of support nuts are arranged at intervals in the circumferential direction of the flange 6, and special bolts are screwed onto the support nuts from above. The special bolt can support the upper surface wall 20 of the protective frame 5 from below. Then, the bolt 48 described above is screwed into a nut portion formed on the head of the special bolt, and the special bolt can be rotated from above through the opening 44 with the bolt 48 and the washer 46 removed. it can. By such a special bolt turning operation, the outer peripheral wall 22 of the protective frame 5 and the surrounding pavement can be cut off as in the first embodiment.
[0032]
In each embodiment, a screw-type or hydraulic-type jack is used as the lifting support means. However, any other jack or lifting mechanism may be used as long as the protection frame 5 is supported so as to be lifted and lowered.
In the second embodiment, the protective frame is divided into three equal parts. However, in the present invention, there are no particular restrictions on the number of divided protective frames or equal divisions, and the form of division may be changed as appropriate.
[0033]
In the third embodiment, a hydraulic telescopic jack is used as the fluid pressure drive mechanism, but other types may be used.
[0034]
【The invention's effect】
The receiving frame of the lid for an underground structure according to the present invention (Claims 1 and 2 ) facilitates the level adjustment work of the receiving frame after being once installed, and greatly improves the work efficiency.
Further, the receiving frame for the underground structure lid of the present invention (Claims 3 and 4 ) has a structure in which the elevating support means can be operated from above the protective frame. .
[0035]
Further, the receiving frame for the underground structure lid according to the present invention (Claim 5 ) can perform the edge cutting operation of the protective frame by the fluid pressure driving mechanism, so that significant labor saving can be achieved during the level adjustment operation.
Furthermore, since the receiving frame for the underground structure lid of the present invention (Claim 6 ) can be easily detached and transported by dividing the protective frame, it provides a structure of the receiving frame that is more practical. Can do.
[Brief description of the drawings]
FIG. 1 is a partial plan view showing a state where a lid body is installed on a receiving frame of a lid for an underground structure according to the present invention.
FIG. 2 is a cross-sectional view of a receiving frame taken along line II-II in FIG.
3 is an exploded perspective view of the receiving frame shown in FIG. 1. FIG.
FIG. 4 is a perspective view showing a state when the bolt is first removed in the work of removing the protective frame.
FIG. 5 is a perspective view showing a state where a washer is further removed from the state of FIG. 4;
FIG. 6 is a perspective view for explaining an operation of rotating the special nut from above the protective frame.
FIG. 7 is a perspective view showing a state when a protective frame is removed.
FIG. 8 is a perspective view for explaining level adjustment work of the receiving frame main body.
FIG. 9 is a perspective view for explaining an operation of attaching a protective frame after adjusting the level of the receiving frame main body.
FIG. 10 is a perspective view showing a receiving frame of a cover for an underground structure according to a second embodiment.
FIG. 11 is a perspective view showing a receiving frame of a cover for an underground structure according to a third embodiment.
12 is a perspective view showing a configuration of a fluid pressure drive mechanism in FIG. 11. FIG.
13 is a perspective view partially showing a concave portion of the protective frame in FIG. 11. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cover for underground structures 2 Receiving frame 3 Lid main body 4 Receiving frame main body 5 Protective frame 5a, 5b, 5c Block 6 Flange 19 Outer peripheral surface 20 Upper surface wall 22 Outer peripheral wall 28 Support bolt (lifting support means)
30 Special nut (lifting support means)
44 opening 54 telescopic jack (fluid pressure drive mechanism)

Claims (6)

A receiving frame body that is installed above the underground structure and supports the lid body on the ground surface;
The receiving frame is detachably disposed on the outer periphery of the main body consists of a protective frame which surrounds the flange upper surface and the outer peripheral surface of said receiving frame body,
Wherein the said upper flange surface of the receiving frame body, the protective frame vertically movable support, provided with a lifting support means to allow withdrawal of the protective frame upward from the receiving frame body,
The protective frame has an upper surface wall that extends annularly around the lid body in parallel with the ground surface, and an outer peripheral wall that extends in a cylindrical shape from the outer periphery of the flange of the receiving frame body to the ground surface. Receiving frame for object lid. A receiving frame body that is installed at the top of the underground structure, supports the lid body on the ground surface, and has a flange at the lower end,
A fixing bolt that is vertically planted in the upper part of the underground structure and passes through a bolt hole that is opened in the flange of the receiving frame body, and a level adjustment that is screwed into the fixing bolt and can move up and down with respect to the fixing bolt. A level adjusting means that has a block, supports the flange of the receiving frame body from below by the level adjusting block, and allows the installation level of the receiving frame body to be adjusted by moving the level adjusting block up and down;
A protective frame disposed on the outer periphery of the receiving frame main body and surrounding the receiving frame main body so as to cover the upper side of the flange;
An elevating support means for supporting the protective frame so as to be movable up and down with respect to the flange of the receiving frame main body, and allowing the protective frame to be detached upward from the receiving frame main body;
The protective frame has an upper surface wall that extends annularly around the lid body in parallel with the ground surface, and an outer peripheral wall that extends in a cylindrical shape from the outer periphery of the flange of the receiving frame body to the ground surface. Receiving frame for object lid. The lifting support means is
A plurality of support bolts extending upward from the upper surface of the flange of the receiving frame main body and spaced apart in the circumferential direction;
A special nut that is screwed onto each of the support bolts and supports the upper surface wall of the protective frame from below;
The receiving frame for a cover for an underground structure according to claim 1 or 2 , further comprising an opening formed on the upper surface wall at a position corresponding to each of the support bolts and enabling the special nut to rotate from above. . The lifting support means is
A plurality of support nuts provided on the flange upper surface of the receiving frame main body at intervals in the circumferential direction;
A special bolt that is screwed to each of the support nuts and supports the upper surface wall of the protective frame from below;
3. A receiving frame for a lid for an underground structure according to claim 1 or 2 , further comprising an opening formed on the upper surface wall at a position corresponding to each of the support nuts and enabling the special bolt to rotate from above. . The lifting support means is
A fluid pressure drive mechanism for raising and lowering the protective frame by fluid pressure;
The receiving frame for a lid for an underground structure according to claim 1 or 2 , further comprising: a fluid supply / discharge means that allows the working fluid to be supplied / discharged from the outside of the protective frame to the fluid pressure driving mechanism. The receiving frame for a lid for an underground structure according to any one of claims 1 to 5 , wherein the protective frame is composed of a plurality of blocks divided in a circumferential direction.

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