JP2015117503A - Fitting structure for manhole cover and method for fitting and removing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting structure for a manhole cover and a method for fitting and removing the same.SOLUTION: In a fitting structure for a manhole cover, which has a cover body and a cover receiving frame 12 connected integrally with the cover body and is to be fitted to a manhole mouth edge 40, the manhole mouth edge has a plurality of counterbores 52 for the inner peripheral surface positioned on the inner peripheral surface and extends toward the outer peripheral surface side, and a through-hole of the counterbore for the inner peripheral surface that is pierced toward the upper surface of the manhole mouth edge upward from inside of each of the counterbores for the inner peripheral surface. The manhole mouth edge and the cover receiving frame are fixed by tightening a nut 56 on the upper end side of a connecting screw rod inserted through a flange-part through-hole 55 drilled through the cover receiving frame beforehand and the through-hole of the counterbore for the inner peripheral surface, and by tightening a nut 57 in the counterbore for the inner peripheral surface on the lower end side.

Description

    The present invention relates to a mounting structure for a manhole cover provided with water pressure resistance that is attached to the edge of a concrete manhole, and a method for mounting and removing the manhole cover.

  The present invention is not a so-called drop lid-like manhole cover, but a waterhole-resistant manhole cover, for example, a cover for a manhole opening in a groundwater channel buried under a road surface. It is a concrete manhole cover that requires water pressure resistance so that the cover does not float or come off.

This type of manhole cover has a structure in which a so-called lid main body and a lid receiving frame for receiving the lid main body are integrated so as to be freely opened and closed, and the mounting structure to the manhole mouth edge is directly attached to the manhole mouth edge. This is a structure for attaching the lid receiving frame. A lid receiving frame constituting this type of lid is generally shaped like a cross section of a hat hat, and includes a cylindrical main body and a flange portion provided around the outer periphery lower end side of the main body. .

In general, this type of lid is integrally connected with a hinge structure so that one end side of the lid main body covers the upper end side opening of the cylindrical main body of the lid receiving frame so as to be openable and closable. The other end is provided with a lock mechanism that is detachably engaged with the mouth of the cylindrical main body of the lid receiving frame.
Hereinafter, the term “lid” is used in the present specification to include a lid body and a lid receiving frame.

In order to prevent this type of manhole cover from floating or disengaging from the manhole opening, the cover receiving frame integrated with the cover body needs to be securely attached to the concrete manhole opening edge.
The conventional mounting structure is suitable for each of a plurality of screw rods, for example, anchor bolts, in which the base portion is embedded in the concrete of the manhole rim in advance so as to go around the manhole rim (hereinafter also simply referred to as lip). The flange receiving hole disposed in the flange portion of the lid receiving frame is relatively inserted so that the lid receiving frame is directed to the mouth edge, and then penetrates the through hole to the upper surface side of the flange portion. By fitting a nut from the upper end side of the exposed screw rod (anchor bolt) and tightening the screw, the lid receiving frame and thus the lid is firmly fixed to the manhole mouth edge through the flange portion.

Further, in this mounting structure, in many cases, in order to make the road surface coincide with the upper surface of the manhole cover (hereinafter also simply referred to as a cover), the flange portion is disposed between the lower surface side of the flange portion and the upper surface side of the manhole lip. In addition, a concrete ring that has a flat plate shape with an appropriate thickness to serve the function of the spacer and has a donut shape similar to the diameter of the manhole rim or lid receiving frame is used to adjust the height of the lid and the road surface. Interposed as a ring.
As a matter of course, the adjustment ring is appropriately provided with through holes for the screw rods (anchor bolts) depending on the number and positions of the screw rods (anchor bolts).

As described above, the lid for the manhole opening is normally attached to the upper end side of the screw rod embedded in the concrete with the nut tightening via the adjustment ring, and the upper end side of the screw rod screwed to the nut or the flange of the lid receiving frame. The upper surface side of the section was filled with the pavement member constituting the road surface up to the upper surface of the lid, that is, the height of the road surface.

In many cases, this type of manhole cover requires replacement to match the height of the road surface every time the pavement is repaired. Although it is necessary to remove, it is actually not easy to remove this nut.
That is, in order to remove the nut portion, it is necessary to first destroy the pavement member covering the nut portion and expose the nut portion. Since years have passed since it was buried in a paving member such as asphalt, the nut did not rotate easily and was difficult to remove, and it was necessary to cut the nut portion of the screw rod with a cutter.

JP-A-2005-290768

As described above, the manhole cover needs to be adjusted in height so that the upper surface of the cover coincides with the road surface every time the road surface height is changed according to the repair of the road pavement.
In the case of this height adjustment, as described above, the manhole cover is fixed to the nut receiving portion of the screw rod on the upper end side of the screw rod by fixing the lid receiving frame with the screw rod planted on the rim of the manhole. Is buried in the road pavement member, it is very difficult to remove the nut after removing the nut from the screw rod, and then pulling out the cover and the lid receiving frame and adjustment ring from the screw rod to replace them. In many cases, the screw rod itself is difficult to be reused due to corrosion or aging even if it is pulled out and replaced.

For this reason, conventionally, the manhole cover, and therefore the mounting structure itself of the cover receiving frame to the manhole port, including the manhole edge part, is destroyed, or the screw rod and the concrete of the manhole edge part together with the manhole edge part. A method has also been adopted in which the mounting structure itself (including the adjustment ring and the manhole edge) is peeled off from the road surface along with the lid and the lid receiving frame after being horizontally cut from the inner circumference side (special No. 2005-290768).
Such a removal method also requires troublesome post-processing work that requires repairing the broken part of the manhole edge and re-installing a new screw rod on the concrete surface of the edge after removal. End up.

  Also, when screws (including bolts) are pre-installed in the manhole rim, cutting is necessary if the screw is too long, or if it is too short, a separate connecting screw rod is attached to the concrete manhole rim. It was also necessary to provide a new one.

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned problems. In the manhole cover mounting structure, the cover and the frame receiving frame integrated with the cover and the adjustment ring can be attached and removed by tightening a nut or a nut. An object of the present invention is to provide a manhole cover mounting structure, a method for mounting the cover, and a method for removing the cover, which can be easily performed by removing the cover.

The invention of claim 1
In a manhole cover mounting structure in which a manhole cover having a cover body and a cover receiving frame integrally connected to the cover body is attached to a manhole edge,
The manhole lip includes a plurality of inner surface counterbore provided on the inner peripheral surface of the lip so as to extend toward the outer peripheral surface side, and an upper manhole port from within each inner peripheral surface counterbore An inner peripheral face counterbore provided so as to penetrate toward the upper surface of the edge,
The manhole rim and the lid receiving frame are formed by tightening a nut at the upper end side of a connecting screw rod inserted through a flange part through hole and an inner peripheral face countersunk hole provided in advance in the lid receiving frame, A manhole cover mounting structure characterized in that it is fixed by tightening a nut in the counterbore of the peripheral surface.

The invention according to claim 2 is a manhole cover mounting structure in which a manhole cover is attached to the manhole edge via an adjustment ring .
The manhole cover includes a cover body and a cover receiving frame integrally connected to the cover body,
The manhole rim includes a plurality of inner surface counterbore provided on the inner peripheral surface of the rim so as to extend toward the outer peripheral surface side, and an upper manhole rim from within each inner surface counterbore An internal peripheral face counterbore provided so as to penetrate through the upper surface of the
The adjustment ring includes a through hole through which a connection screw rod described later passes,
The manhole rim and the lid receiving frame are formed by a flange portion through-hole provided in the lid receiving frame in advance, a through hole of the adjustment ring, and an upper end side of a connecting screw rod inserted through the inner peripheral face counterbore through hole. A manhole cover mounting structure, wherein a nut is tightened and a lower end side is fixed by tightening a nut within the counterbore of the inner peripheral surface.

According to a third aspect of the invention, in the invention of the first or second aspect, the inner peripheral face counterbore provided in the adjustment ring is formed by embedding a metal frame. Lid mounting structure.

According to a fourth aspect of the present invention, there is provided the manhole cover mounting structure according to the third aspect, wherein the metal frame is a regular hexahedron having one surface opened.

The invention of claim 5 is characterized in that, in the invention of claim 3 or claim 4, a convex portion is provided on the outer surface of the metal frame to serve as a resistance to pulling upward of the frame. Mounting structure for manhole cover.

According to a sixth aspect of the invention, there is provided the manhole cover mounting structure according to the fifth aspect of the invention, wherein the convex portion is flat.

The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the lid receiving frame has a cylindrical main body having an inner diameter similar to the inner diameter of the manhole opening and a lower outer peripheral side of the cylindrical main body. A manhole cover mounting structure comprising a flange portion and a flange portion through hole through which a connecting screw rod is passed.

The invention of claim 8 is the invention according to any one of claims 1 to 7, characterized in that the inner peripheral face counterbore is filled with a corrosion inhibitor for connecting screw rods and nuts. Mounting structure for manhole cover.

The invention according to claim 9 is the invention according to any one of claims 1 to 8, wherein the auxiliary adjustment is made between the cover receiving frame and the adjustment ring or / and between the adjustment ring and the manhole edge. A manhole cover mounting structure characterized by interposing a member.

The invention according to claim 10 is the invention according to claim 9, wherein the auxiliary adjusting member interposed between the cover receiving frame and the adjusting ring is made of ready-mixed concrete so as not to interfere with the insertion and extraction of the connecting screw rod. A manhole cover mounting structure, which is a solidified concrete layer.

The invention of claim 11
Attach the manhole cover to the manhole edge.
The manhole cover includes a lid body and a lid receiving frame integrally connected to the lid body,
The manhole rim includes a plurality of inner surface counterbore provided on the inner peripheral surface of the rim so as to extend toward the outer peripheral surface side, and an upper manhole port from within each of the inner surface counterbore An inner peripheral face counterbore provided so as to penetrate toward the upper surface of the edge,
Structure
First, a manhole cover is overlaid on the manhole rim, and a connecting screw rod is passed from a flange portion through-hole provided in advance in the lid receiving frame through the inner surface counterbore to the inner surface counterbore,
Next, the upper end side of the connecting screw rod is nut-tightened from the upper side, and the lower end side of the connecting screw rod is fixed by tightening the nut in the inner peripheral face counterbore from the inner side of the manhole lip. How to install a manhole cover.

The invention of claim 12
In the mounting method of the manhole cover that attaches the manhole cover to the manhole edge via the adjusting ring,
The manhole cover includes a lid body and a lid receiving frame integrally connected to the lid body,
The manhole rim includes a plurality of inner surface counterbore provided on the inner peripheral surface of the rim so as to extend toward the outer peripheral surface side, and an upper manhole port from within each of the inner surface counterbore An inner peripheral face counterbore provided so as to penetrate toward the upper surface of the edge,
The adjustment ring has a structure including a through-hole through which a connecting screw rod described later passes,
First, an adjustment ring and a manhole cover are overlapped on the manhole rim, and a through hole of the adjustment ring and a counterbore hole of the inner peripheral surface are connected to a connecting screw rod from a flange through hole provided in advance in the cover receiving frame. Through the inner surface counterbore,
Next, the upper end side of the connecting screw rod is tightened with a nut, and the lower end side of the connecting screw rod is fixed by tightening a nut inside the counterbore from the inner side of the manhole mouth. How to install the lid.

The invention of claim 13 is characterized in that, in the invention of claim 12, an auxiliary adjustment member is interposed between the cover receiving frame and the adjustment ring or / and between the adjustment ring and the manhole edge. How to install a manhole cover.

The invention of claim 14 is the invention of claim 13, wherein the auxiliary adjusting member interposed between the lid receiving frame and the adjusting ring is made of ready-mixed concrete so as not to interfere with the insertion and extraction of the connecting screw rod. A method for attaching a manhole cover, characterized by being a solidified concrete layer.

The invention of claim 15
The mounting structure of the manhole cover attached to the manhole rim is
The manhole cover includes a cover body and a cover receiving frame integrally connected to the cover body.
The manhole lip includes a plurality of inner surface counterbore provided on the inner peripheral surface of the lip so as to extend toward the outer peripheral surface side, and an upper manhole port from within each inner peripheral surface counterbore An inner peripheral face counterbore provided so as to penetrate toward the upper surface of the edge,
The manhole rim and the lid receiving frame are formed by tightening a nut at the upper end side of a connecting screw rod inserted through a flange part through hole and an inner peripheral face countersunk hole provided in advance in the lid receiving frame, In the method of removing the manhole cover fixed by tightening the nut in the counterbore of the peripheral surface,
First, a method for removing a manhole cover, comprising removing a nut fastened to a connecting screw rod in the inner peripheral face counterbore from the inside of a manhole opening.

The invention of claim 16
The mounting structure of the manhole cover attached to the manhole edge via the adjustment ring
The manhole cover includes a cover body and a cover receiving frame integrally connected to the cover body.
The adjustment ring has a through hole through which a connecting screw rod described later passes.
The manhole lip includes a plurality of inner surface counterbore provided on the inner peripheral surface of the lip so as to extend toward the outer peripheral surface side, and an upper manhole port from within each inner peripheral surface counterbore An inner peripheral face counterbore provided so as to penetrate toward the upper surface of the edge,
The manhole rim and the lid receiving frame have a nut on the upper end side of a connecting screw rod inserted through a flange portion through hole provided in the lid receiving frame in advance, a through hole of the adjustment ring and a counter bore through the inner peripheral surface. In the method for removing the manhole cover, which is tightened and the lower end side is fixed by tightening the nut in the counterbore of the inner peripheral surface,
First, a method for removing a manhole cover, comprising removing a nut fastened to a connecting screw rod in the inner peripheral face counterbore from the inside of a manhole opening.

The invention of claim 17 is the method for removing the manhole cover according to any one of claims 15, 16, 18, and 19.
Remove the nuts tightened on the connecting screw rods in the counterbore on the inner peripheral surface, cut into the paved road surface around the periphery of the manhole mouth, and tear off the manhole cover along the paved road surface that has been cut into a circle. A method for removing a manhole cover, which is characterized.

According to an eighteenth aspect of the present invention, there is provided an auxiliary adjustment according to any one of the sixteenth and seventeenth aspects, wherein the auxiliary adjustment is provided between the cover receiving frame and the adjustment ring or / and between the adjustment ring and the manhole edge. A method for removing a manhole cover, characterized in that a member is interposed.

According to a nineteenth aspect of the present invention, in the eighteenth aspect, the auxiliary adjusting member interposed between the cover receiving frame and the adjusting ring is made of ready-mixed concrete which has been applied so as not to obstruct the mounting / removal of the connecting screw rod. A method for removing a manhole cover, characterized by comprising a concrete layer.

  According to a twentieth aspect of the invention, there is provided a manhole cover mounting structure according to the first to tenth aspects of the invention, wherein a bolt is used instead of the connecting screw rod.

  A twenty-first aspect of the present invention is the method for attaching a manhole cover according to the eleventh to fourteenth aspects of the present invention, wherein a bolt is used instead of the connecting screw rod.

  A twenty-second aspect of the invention is the method of removing a manhole cover according to the fifteenth to nineteenth aspects of the invention, wherein a bolt is used instead of the connecting screw rod.

According to the inventions of claims 1 to 22, in any case, only the nut on the lower end side of the connecting screw rod in the inner peripheral face counterbore is removed from the inner side of the manhole opening, so that the manhole cover and therefore the cover main body The integrated lid receiving frame can be removed from the manhole edge, and the manhole cover can be replaced quickly and easily.
The

According to the inventions of claims 2 to 10, claims 12 to 14, and claims 16 to 19, all of the manhole cover mounting structure with an adjustment ring interposed therebetween, The use of a connecting screw rod of an appropriate length according to the required height adjustment amount at each work site requires extra work to drill a hole for embedding an anchor bolt in the concrete manhole edge. Rather than installing a manhole cover that is addressed to the manhole edge, and therefore a cover receiving frame integrated with the cover body, or an adjustment ring for height adjustment, attach nuts on both ends of the connecting screw rod. The manhole cover can be attached simply by tightening the nut. When removing the manhole cover, it is only necessary to remove the nut on the lower end side of the connecting screw rod. The or removal operation can be performed quickly and easily.

  According to the third to sixth aspects of the present invention, it is possible to prevent the adjustment ring from being reduced in strength by providing the inner peripheral face counterbore, and to improve the durability against the disconnection of the connecting screw rod. it can.

  According to the fifth and sixth aspects of the invention, it is possible to further enhance the durability against the disconnection of the connecting screw rod.

According to the invention of claim 8, the corrosion resistance of the connecting screw rod and the nut in the counterbore for the inner peripheral surface can be enhanced.

  According to the ninth, tenth, thirteenth, fourteenth, eighteenth, and nineteenth aspects of the invention, any of the subtle height adjustments that cannot be adjusted only by the adjustment ring can be performed at the installation work site. Can be carried out easily and quickly.

According to the inventions of claims 11, 12 and 16, the manhole cover, and thus the cover receiving frame integrated with the cover main body or the cover and the adjustment ring, etc. can be quickly and easily only by the nut operation method. It can be attached or removed, and the manhole cover can be replaced more efficiently than before.

According to the invention of claim 17, a paved road surface in which a nut fastened to a connecting screw rod in an inner peripheral face counterbore is removed and cut into a paved road surface so as to go around a peripheral edge of a manhole, and is cut into a circular shape. By removing the manhole cover, the manhole cover can be easily and quickly removed as compared with the conventional case.

FIG. 1 is a cross-sectional view of a manhole cover. FIG. 2 is a vertical cross-sectional view showing a state where the lid receiving frame is attached. FIG. 3 is a perspective view of a metal frame.

As the best mode for carrying out the present invention, an embodiment applied to a manhole under a road surface will be described with reference to FIGS. In addition, this Example is an example provided with the below-mentioned adjustment ring and metal frame.

A manhole cover 10 having water pressure resistance shown in FIG. 1 includes a cover body 11 and a cover receiving frame 12 integrally connected to the cover body 11.
That is, one end side of the lid body 11 is connected and integrated with the lid body 11 by the hinge structure 123 so that the upper end side opening 122 of the cylindrical body 121 of the lid receiving frame 12 can be freely opened and closed. The end side, that is, the open end side is detachably engaged with the mouth edge of the opening 122 of the cylindrical main body 121 via the lock mechanism 124.

Further, as shown in the figure, a lid receiving frame 12 that integrally constitutes this kind of lid 10 together with a lid body 11 is generally shaped like a cross section of a hat hat, and a cylindrical body 121 having an inner diameter similar to the inner diameter of the manhole port. The cylindrical main body 121 has a flange portion 125 that goes around the outer periphery at the lower end of the outer periphery, and the flange portion 125 is provided with a flange portion through-hole 55 through which a connecting screw rod 54 described later passes. Hereinafter, in this embodiment, the term lid 10 includes a lid body 11 and a lid receiving frame 12.

2, in the mounting structure of the manhole cover 10 of this embodiment, the adjustment ring 50 interposed between the manhole cover 10 and the manhole edge 40 has a manhole edge 40 as shown in the figure. In the state where the adjustment ring 50 is stacked on the inner peripheral surface counterbore 52 in which the lower end side of the connecting screw rod 54 inserted through the flange portion through hole 55 of the flange portion 125 is formed in the inner peripheral surface of the manhole lip 40. A through hole 51 for a connecting screw rod is provided so as to reach.

The manhole rim 40 and the lid receiving frame 12 of the manhole cover 10 fixed via the adjustment ring 50 are from the upper surface side of the inner peripheral face counterbore 52 provided on the inner peripheral surface side of the manhole rim 40. One end, that is, the upper end of the connecting screw rod 54 inserted into the inner surface counterbore through hole 53 and the flange portion through hole 55 penetrated upward is a flange portion provided in the flange portion 125 of the lid receiving frame 12. The nut 56 is tightened through the through hole 55, and the other end, that is, the lower end of the connecting screw rod 54 is fixed in the inner peripheral face counterbore 52 by tightening the nut 57.

When the concrete lid 10 is fixed to the concrete lip 40 via the adjustment ring 50 in this way, the adjustment ring 50 is previously provided with a plurality of, for example, at least three pieces arranged at equal intervals. The connection screw rod through-hole 51 is provided to allow the connection screw rod 54 to pass through in the axial direction of the adjustment ring 50.

Further, the same number (several number) of the inner peripheral face spot facings 52 provided on the inner peripheral face side of the manhole rim 40 as the connecting screw rods 54 to be inserted are on the inner peripheral face side of the manhole rim 40. To the outer peripheral surface side so as to extend in the horizontal direction.
The inner peripheral face counterbore 53 is provided so as to penetrate from the inner peripheral face counterbore 52 upward in the adjustment ring axial direction.

The inner peripheral face counterbore 52 can be operated by a nut for attaching or removing a nut 57 addressed to the lower end side of the connecting screw rod 54 from the inner peripheral surface side of the manhole edge, that is, the inner side of the manhole mouth. For example, in the embodiment, the air space is formed in a box shape.

In FIG. 3, the inner face counterbore 52 is formed when a concrete manhole rim is formed or when the counterbore is drilled in the concrete wall on the inner face of the manhole rim. Alternatively, it may be provided as a concave portion made of concrete that is opened and recessed toward the inner peripheral surface side of the manhole lip 40, but in this embodiment, the connecting screw rod 54 passed through the inner peripheral face counterbore 52 is provided. In order to further enhance the pull-out resistance according to the above-mentioned, not only by the strength of the concrete, the metal frame 60 is embedded and formed.

The metal frame 60 shown in this embodiment is a regular hexahedron frame that is open on one side, and the frame itself is pulled out upward on the left and right outer surfaces of the metal frame 60. A plate-like convex portion 61 is provided so as to have the above resistance. Of course, the shape of the convex portion 61 is not limited to a flat plate shape, and may be any shape that can provide resistance to the drawing direction received by the connecting screw rod 54.

  Although not shown, the inner peripheral face counterbore 52 may be filled with a corrosion inhibitor such as grease to prevent corrosion of the internal connecting screw rod 54 and nut 57. .

Further, in order to finely adjust the coincidence between the upper surface of the lid 10 and the road surface, between the lower surface side of the lid receiving frame 12 and the upper surface side of the adjustment ring 50 and / or the lower surface side of the adjustment ring 50 and the manhole edge 40. An appropriate auxiliary adjustment member (not shown) that performs a spacer function, such as a concrete layer solidified with fresh concrete interposed, may be interposed between the upper surface side of the first and second upper surfaces.
In addition, when applying ready-mixed concrete, it is possible to directly attach and remove the above-described connecting screw rod 54 exposed to the construction space, that is, directly to the screw rod 54 so as not to interfere with insertion and extraction through the through holes 51 and 53. It is preferable to construct so as not to contact.

As described above, the mounting structure of the manhole cover according to the embodiment includes the manhole cover 10 including the cover body 11 and the cover receiving frame 12 integrally connected to the cover body 11. Further, a flat plate-like adjustment ring 50 is placed in an overlapped state, and a through hole (through hole for a connection screw rod) 51 through which a plurality of connection screw rods 54 are passed in the adjustment ring 50 in advance in the direction of the adjustment ring axis. It is provided to penetrate.
Further, the manhole rim 40 has a plurality of inner surface counterbore 52 and an upper surface from the inner surface counterbore 52 so as to extend horizontally from the inner surface to the outer surface. It is set as the structure provided with the internal surface counterbore through-hole 53 grade | etc., So that it may penetrate toward the flange part through-hole 55 of the flange part 125 of the lid receiving frame 12 located in this.

Accordingly, the manhole cover 10 can be attached to the manhole edge 40 as follows.
That is, first, in order to fix the manhole edge 40 and the adjustment ring 50, the adjustment ring 50 and then the manhole cover 10 are stacked on the manhole edge 40, and the flange portion through hole 55 of the flange portion 125 and the adjustment ring 50 are overlapped. A connecting screw rod of an appropriate length, that is, a connecting screw rod 54 is inserted so as to reach the inner peripheral face counterbore 52 through the through-hole 51 for the connecting hole and the through-hole 51 for the connecting screw rod in the manhole edge 40. One end, that is, the upper end side of the screw rod 54 is fastened and fixed with a nut 56 in a state where the flange portion 125 of the lid receiving frame 12 is passed through the flange portion through-hole 55, and the other end, that is, the lower end side of the connection screw rod 54. In the counterbore 52 on the inner peripheral surface, the nut 57 is tightened and fixed by work from the inside of the mouth of the manhole.
In this manner, the manhole cover 10 can be quickly and easily attached to the manhole edge 40 via the adjustment ring 50.

On the other hand, the manhole cover 10 can be easily and quickly removed from the manhole edge 40 as follows.
That is, the nut 57 in the lower end side of the connecting screw rod 54, that is, the inner peripheral face counterbore 52 is simply removed from the manhole. It is not necessary to remove the upper end side of the connecting screw rod 54 forcibly. This is because the connecting screw rod 54 is free in the upper direction, that is, in the pulling direction, only by removing the nut 57 on the lower end side.

According to the above embodiment, the manhole cover attached to the manhole mouth edge 40 via the adjustment ring 50 can be quickly and easily attached or removed by the method described above.

In the above attachment and removal method, as described in the above embodiment, between the lid receiving frame 12 of the lid 10 and the adjustment ring 50 or / and between the adjustment ring 50 and the manhole edge 40. It may be attached with an auxiliary adjustment member interposed, or even if an auxiliary adjustment member is interposed, there is no problem in removal.
An auxiliary adjustment member (not shown) interposed between the lid receiving frame 12 and the adjustment ring 50 is a concrete layer in which ready-mixed concrete is solidified so as not to hinder the attachment / detachment of the nut of the connecting screw rod. May be.

  Further, the attachment or removal of the manhole cover 10 directly to or from the manhole edge 40 without using the adjustment ring 50 can be performed more easily and quickly because the adjustment ring 50 does not exist. It will be easily understood from the description of the embodiments.

In the above embodiment, a threaded rod, i.e., a rod-shaped screw having no head at the end, such as a bolt head, is used as the connecting threaded rod, but a bolt may be used instead of the connecting threaded rod (not shown). )
In this case, as a matter of course, a bolt having a required length is inserted from the flange portion through-hole 55 side of the flange portion 125 of the manhole cover 10, and the lower end side of the bolt reaching the inner peripheral face counterbore 52. A manhole cover can be attached and removed quickly and easily only by tightening and removing only the lower end nut (not shown).

  The present invention relates to a mounting structure and a mounting / removing method for a waterproof manhole cover buried under a road surface. However, the present invention is widely used as a mounting structure and a mounting / removing method for a general manhole cover. Can do.

10 Manhole cover (lid)
11 Lid body 12 Lid receiving frame 125 Flange (lid receiving frame)
40 Manhole rim 50 Adjustment ring
51 Connection screw rod through hole 52 Internal peripheral face counterbore 53 Connection screw rod through hole 54 Connection screw rod 55 Flange through hole 56 Nut (upper end of connection screw rod)
57 Nut (lower end of connecting screw rod)
60 Metal frame 61 Convex part (metal frame)

The invention according to claim 2 is a manhole cover mounting structure in which a manhole cover is attached to the manhole edge via an adjustment ring .
The manhole cover includes a cover body and a cover receiving frame integrally connected to the cover body,
The manhole rim includes a plurality of inner surface counterbore provided on the inner peripheral surface of the rim so as to extend toward the outer peripheral surface side, and an upper manhole rim from within each inner surface counterbore An internal peripheral face counterbore provided so as to penetrate through the upper surface of the
The adjustment ring includes a through hole through which a connection screw rod described later passes,
The manhole rim and the lid receiving frame are formed by a flange portion through-hole provided in the lid receiving frame in advance, a through hole of the adjustment ring, and an upper end side of a connecting screw rod inserted through the inner peripheral face counterbore through hole. A manhole cover mounting structure, wherein a nut is tightened and a lower end side is fixed by tightening a nut within the counterbore of the inner peripheral surface.

According to a third aspect of the present invention, there is provided the manhole cover mounting structure according to the first or second aspect of the present invention, wherein the counterbore for the inner peripheral surface is formed by embedding a metal frame.

The invention of claim 17 is the manhole cover removing method according to claim 15 or claim 16 ,
Remove the nuts tightened on the connecting screw rods in the counterbore on the inner peripheral surface, cut into the paved road surface around the periphery of the manhole mouth, and tear off the manhole cover along the paved road surface that has been cut into a circle. A method for removing a manhole cover, which is characterized.

According to a twentieth aspect of the invention, in the invention according to any one of the first to tenth aspects of the present invention, a manhole cover mounting structure is characterized in that a bolt is used instead of the connecting screw rod.

A twenty-first aspect of the present invention is the method for attaching a manhole cover according to any of the eleventh to fourteenth aspects, wherein a bolt is used instead of the connecting screw rod.

The invention of claim 22 is the method of removing a manhole cover according to any one of claims 15 to 19, wherein a bolt is used instead of the connecting screw rod.

The invention according to claim 2 is a manhole cover mounting structure in which a manhole cover is attached to the manhole edge via an adjustment ring .
The manhole cover includes a cover body and a cover receiving frame integrally connected to the cover body,
The manhole rim includes a plurality of inner surface counterbore provided on the inner peripheral surface of the rim so as to extend toward the outer peripheral surface side, and an upper manhole rim from within each inner surface counterbore An internal peripheral face counterbore provided so as to penetrate through the upper surface of the
The adjustment ring includes a through hole through which a connection screw rod described later passes,
The manhole rim and the lid receiving frame are formed by a flange portion through-hole provided in the lid receiving frame in advance, a through hole of the adjustment ring, and an upper end side of a connecting screw rod inserted through the inner peripheral face counterbore through hole. A manhole cover mounting structure, wherein a nut is tightened and a lower end side is fixed by tightening a nut within the counterbore of the inner peripheral surface.

According to a third aspect of the present invention, there is provided the manhole cover mounting structure according to the first or second aspect of the present invention, wherein the counterbore for the inner peripheral surface is formed by embedding a metal frame.

The invention of claim 17 is the manhole cover removing method according to claim 15 or claim 16 ,
Remove the nuts tightened on the connecting screw rods in the counterbore on the inner peripheral surface, cut into the paved road surface around the periphery of the manhole mouth, and tear off the manhole cover along the paved road surface that has been cut into a circle. A method for removing a manhole cover, which is characterized.

According to a twentieth aspect of the invention, in the invention according to any one of the first to tenth aspects of the present invention, a manhole cover mounting structure is characterized in that a bolt is used instead of the connecting screw rod.

A twenty-first aspect of the present invention is the method for attaching a manhole cover according to any of the eleventh to fourteenth aspects, wherein a bolt is used instead of the connecting screw rod.

The invention of claim 22 is the method of removing a manhole cover according to any one of claims 15 to 19, wherein a bolt is used instead of the connecting screw rod.

Claims (22)

In a manhole cover mounting structure in which a manhole cover having a cover body and a cover receiving frame integrally connected to the cover body is attached to a manhole edge,
The manhole lip includes a plurality of inner surface counterbore provided on the inner peripheral surface of the lip so as to extend toward the outer peripheral surface side, and an upper manhole port from within each inner peripheral surface counterbore An inner peripheral face counterbore provided so as to penetrate toward the upper surface of the edge,
The manhole rim and the lid receiving frame are formed by tightening a nut at the upper end side of a connecting screw rod inserted through a flange part through hole and an inner peripheral face countersunk hole provided in advance in the lid receiving frame, A manhole cover mounting structure characterized in that it is fixed by tightening a nut in the counterbore of the peripheral surface. In the manhole cover mounting structure where the manhole cover is attached to the manhole edge via an adjustment ring .
The manhole cover includes a cover body and a cover receiving frame integrally connected to the cover body,
The manhole rim includes a plurality of inner surface counterbore provided on the inner peripheral surface of the rim so as to extend toward the outer peripheral surface side, and an upper manhole rim from within each inner surface counterbore An internal peripheral face counterbore provided so as to penetrate through the upper surface of the
The adjustment ring includes a through hole through which a connection screw rod described later passes,
The manhole rim and the lid receiving frame are formed by a flange portion through-hole provided in the lid receiving frame in advance, a through hole of the adjustment ring, and an upper end side of a connecting screw rod inserted through the inner peripheral face counterbore through hole. A manhole cover mounting structure, wherein a nut is tightened and a lower end side is fixed by tightening a nut within the counterbore of the inner peripheral surface. The mounting structure for a manhole cover according to claim 1 or 2, wherein the counterbore for the inner peripheral surface provided on the adjustment ring is formed by embedding a metal frame. 4. The manhole cover mounting structure according to claim 3, wherein the metal frame is a regular hexahedron having one surface opened. The manhole cover mounting structure according to claim 3 or 4, wherein a convex portion is provided on the outer surface of the metal frame body to be a resistance to pulling out the frame body upward. 6. The mounting structure for a manhole cover according to claim 5, wherein the convex portion has a flat plate shape. The lid receiving frame includes a cylindrical main body having an inner diameter similar to the inner diameter of the manhole opening, a flange portion on the outer peripheral side of the lower end of the cylindrical main body, and a flange portion through-hole through which a connecting screw rod is passed. The mounting structure for a manhole cover according to any one of claims 1 to 6. 8. The manhole cover mounting structure according to claim 1, wherein the inner peripheral face counterbore is filled with a corrosion inhibitor for a connecting screw rod and a nut. 9. The manhole according to claim 1, wherein an auxiliary adjusting member is interposed between the cover receiving frame and the adjusting ring or / and between the adjusting ring and the manhole edge. Lid mounting structure. 10. The auxiliary adjustment member interposed between the lid receiving frame and the adjustment ring is a concrete layer obtained by solidifying ready-mixed concrete applied so as not to interfere with insertion and extraction of the connecting screw rod. Mounting structure for manhole cover. Attach the manhole cover to the manhole edge.
The manhole cover includes a lid body and a lid receiving frame integrally connected to the lid body,
The manhole rim includes a plurality of inner surface counterbore provided on the inner peripheral surface of the rim so as to extend toward the outer peripheral surface side, and an upper manhole port from within each of the inner surface counterbore An inner peripheral face counterbore provided so as to penetrate toward the upper surface of the edge,
Structure
First, a manhole cover is overlaid on the manhole rim, and a connecting screw rod is passed from a flange portion through-hole provided in advance in the lid receiving frame through the inner surface counterbore to the inner surface counterbore,
Next, the upper end side of the connecting screw rod is nut-tightened from the upper side, and the lower end side of the connecting screw rod is fixed by tightening the nut in the inner peripheral face counterbore from the inner side of the manhole lip. How to install a manhole cover. In the mounting method of the manhole cover that attaches the manhole cover to the manhole edge via the adjusting ring,
The manhole cover includes a lid body and a lid receiving frame integrally connected to the lid body,
The manhole rim includes a plurality of inner surface counterbore provided on the inner peripheral surface of the rim so as to extend toward the outer peripheral surface side, and an upper manhole port from within each of the inner surface counterbore An inner peripheral face counterbore provided so as to penetrate toward the upper surface of the edge,
The adjustment ring has a structure including a through-hole through which a connecting screw rod described later passes,
First, an adjustment ring and a manhole cover are overlapped on the manhole rim, and a through hole of the adjustment ring and a counterbore hole of the inner peripheral surface are connected to a connecting screw rod from a flange through hole provided in advance in the cover receiving frame. Through the inner surface counterbore,
Next, the upper end side of the connecting screw rod is tightened with a nut, and the lower end side of the connecting screw rod is fixed by tightening a nut inside the counterbore from the inner side of the manhole mouth. How to install the lid. The method for attaching a manhole cover according to claim 12, wherein an auxiliary adjusting member is interposed between the cover receiving frame and the adjusting ring or / and between the adjusting ring and the manhole mouth edge. The auxiliary adjustment member interposed between the lid receiving frame and the adjustment ring is a concrete layer in which ready-mixed concrete is solidified so as not to interfere with insertion and extraction of the connecting screw rod. How to install the manhole cover. The mounting structure of the manhole cover attached to the manhole rim is
The manhole cover includes a cover body and a cover receiving frame integrally connected to the cover body.
The manhole lip includes a plurality of inner surface counterbore provided on the inner peripheral surface of the lip so as to extend toward the outer peripheral surface side, and an upper manhole port from within each inner peripheral surface counterbore An inner peripheral face counterbore provided so as to penetrate toward the upper surface of the edge,
The manhole rim and the lid receiving frame are formed by tightening a nut at the upper end side of a connecting screw rod inserted through a flange part through hole and an inner peripheral face countersunk hole provided in advance in the lid receiving frame, In the method of removing the manhole cover fixed by tightening the nut in the counterbore of the peripheral surface,
First, a method for removing a manhole cover, comprising removing a nut fastened to a connecting screw rod in the inner peripheral face counterbore from the inside of a manhole opening. An attachment structure of a manhole cover attached to the manhole edge via an adjustment ring, the manhole cover includes a lid body and a lid receiving frame integrally connected to the lid body,
The adjustment ring has a through hole through which a connecting screw rod described later passes.
The manhole lip includes a plurality of inner surface counterbore provided on the inner peripheral surface of the lip so as to extend toward the outer peripheral surface side, and an upper manhole port from within each inner peripheral surface counterbore An inner peripheral face counterbore provided so as to penetrate toward the upper surface of the edge,
The manhole rim and the lid receiving frame have a nut on the upper end side of a connecting screw rod inserted through a flange portion through hole provided in the lid receiving frame in advance, a through hole of the adjustment ring and a counter bore through the inner peripheral surface. In the method for removing the manhole cover, which is tightened and the lower end side is fixed by tightening the nut in the counterbore of the inner peripheral surface,
First, a method for removing a manhole cover, comprising removing a nut fastened to a connecting screw rod in the inner peripheral face counterbore from the inside of a manhole opening. Remove the nuts fastened to the connecting screw rods in the inner surface counterbore, cut into the paved road surface around the periphery of the manhole mouth, and tear off the manhole cover along the paved road surface cut in a circle The method for removing a manhole cover according to any one of claims 15, 16, 18, and 19. 18. The manhole according to claim 16, wherein an auxiliary adjusting member is interposed between the lid receiving frame and the adjusting ring or / and between the adjusting ring and the manhole mouth edge. How to remove the lid. The auxiliary adjustment member interposed between the lid receiving frame and the adjustment ring is a concrete layer obtained by solidifying ready-mixed concrete so as not to hinder the attachment / detachment of the connecting screw rod. How to remove the manhole cover.   11. The mounting structure for a manhole cover according to claim 1, wherein a bolt is used instead of the connecting screw rod.   The method for attaching a manhole cover according to any one of claims 11 to 14, wherein a bolt is used instead of the connecting screw rod. The method for removing a manhole cover according to any one of claims 15 to 19, wherein a bolt is used in place of the connecting screw rod.

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