JP3264738B2 - Installation structure of manhole cover device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an installation structure of a manhole cover device configured so that a receiving frame and a cover are taperedly fitted.
In particular, the present invention relates to a structure in which the lid device can be installed in an opening of a manhole while ensuring a state where the function by the taper fitting can be sufficiently exhibited.

[0002]

2. Description of the Related Art Conventionally, manholes have been provided in underground buried structures such as water and sewage systems and gas as entrances and exits for maintenance and management thereof. A manhole cover device, which is configured with a cover body that can open and close the opening portion, is installed.

[0003] In recent years, a so-called tapered fitting type manhole cover device in which a receiving frame and a lid are taperedly fitted has been widely used as such a manhole cover device. In the tapered fitting type manhole cover device, the lid and the receiving frame are configured so that the inclination angles of the corresponding tapered surfaces thereof exactly match each other, and the "wedge" effect causes the lid to be moved relative to the receiving frame. The lid can be held firmly, so that rattling of the lid and detachment from the receiving frame can be effectively prevented.

In general, in such a tapered fitting type manhole cover device, the lower flange portion of the receiving frame is directly placed on the opening peripheral portion of the mouth frame provided at the opening of the manhole. Alternatively, the manhole cover device is mounted on an opening of the manhole by being placed via an adjusting body for adjusting the installation height of the manhole cover device and further fixed by bolts.

By the way, as is well known, when the manhole cover device is installed as described above, the adjusting body disposed at the opening of the manhole is provided on the upper surface (the cover body) of the manhole cover device. The upper surface) is provided to adjust the height position so that the surface is substantially flush with a road surface such as a pavement surface of a road, and mortar is spread over an opening peripheral portion of the mouth frame, By hardening this, a block body having a predetermined height is provided, or a brick block or the like is arranged at a predetermined height on the peripheral portion to form a block body. Also, the mouth frame that supports such an adjustment body,
Usually, a concrete product is provided by being placed in an opening of a manhole. That is, the adjusting body and the mouth frame are installed at the opening of the manhole by field construction having a relatively large dimensional error anyway.

Therefore, at the opening of the manhole,
For example, it is extremely difficult to make such an adjustment body or a mouth frame body be held in a horizontal state with high precision, and to make the installation surface of the manhole cover device in the adjustment body or the mouth frame body a horizontal plane with high flatness. It was difficult.

[0007] Therefore, in the installation structure of the manhole cover device as described above, when the manhole cover device is placed in the opening of the manhole, the space between the receiving frame of the manhole cover device and the adjusting body, or A gap is formed between the lower frame and the mouth frame, and when the lower flange of the receiving frame is bolted, bending (bending) may occur in the lower flange. Distortion is caused in the inclination angle of the tapered surface, and the taper fitting between the receiving frame and the lid cannot be performed sufficiently. This has caused a problem that an excellent function such as separation prevention cannot be effectively exhibited.

[0008]

Here, the present invention has been made in view of the above-mentioned circumstances, and a problem to be solved is to provide a lower flange portion of a receiving frame and an opening peripheral portion of a manhole for supporting the lower flange portion. By eliminating the gap between the receiving frame and the lower frame, the occurrence of bending of the lower flange portion of the receiving frame is prevented, whereby a normal taper fitting between the receiving frame and the lid body is performed. An object of the present invention is to provide an installation configuration of a manhole cover device so that the function can be sufficiently exhibited.

[0009]

According to the present invention, there is provided a manhole cover device configured such that a receiving frame and a lid are taperedly fitted, and a lower flange portion of the receiving frame is provided. In a structure that is installed in the opening of the manhole by tightening bolts in a state of being placed on the periphery of the manhole opening, in a structure between the lower flange portion of the receiving frame and the periphery of the manhole opening, appropriately. A deformable housing / holding body containing or holding a hardening material having fluidity that can be hardened is laid, and the arrangement state of the receiving frame is adjusted by deformation of the housing / holding body. By curing the curable material inside or outside the storage / hold,
It is characterized by the installation structure of the manhole cover device in which the predetermined setting state of the receiving frame is held by the generated cured product, and the bolt fixing is performed.

[0010]

In other words, in the installation structure of the manhole cover device according to the present invention, the receiving frame has a housing / holding body in which the predetermined hardening material is housed or held in the lower flange portion. With the cured product generated by curing, the arrangement state with respect to the ground surface such as the road surface, for example, the horizontal state is adjusted and held, while the bolt is fixed, and the lower flange portion of such a receiving frame There is no gap between the hardened material holding it and it, so that when bolting,
Bending at the lower flange portion of the receiving frame can be effectively prevented.

Therefore, when the manhole cover device is installed in the opening of the manhole according to the present invention, it is completely prevented that the installation operation causes distortion in the inclination angle of the tapered surface of the receiving frame of the manhole cover device. Therefore, the taper fitting between the receiving frame and the lid can be normally performed favorably, so that the rattling prevention function and the separation prevention function of the lid can be effectively secured. .

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

First, FIGS. 1 and 2 show an example of an installation structure of a manhole cover device according to the present invention, in which a vertical cross-sectional form in a construction state and an essential part thereof are enlarged. Are shown schematically, respectively. In these figures, reference numeral 10 denotes a manhole cover device, which comprises an annular receiving frame 12 and a disk-shaped cover 14 like the conventional device.
On the opening of No. 6, it is arranged so as to be substantially flush with the ground surface.

In the manhole cover device 10, the upper side of the inner peripheral surface of the receiving frame 12 is formed as a tapered receiving surface 18 having a larger diameter toward the upper side, while the lid 1 is formed.
The outer peripheral surface of 4 is a tapered fitting surface 20 corresponding to the receiving surface 18 of the receiving frame 12. Thus, in the manhole cover device 10, the receiving frame 12 and the cover 14 are taperedly fitted on the receiving surface 18 and the fitting surface 20, so that a vehicle or the like can pass therethrough. The rattle and detachment of the lid 14 due to a shock at the time, an increase in the internal pressure in the manhole, and the like are prevented.

On the other hand, at the opening of the manhole 16 in which the manhole cover device 10 is arranged, a concrete frame 22 is provided. In addition, this mouth frame 22
A block body 24 for adjusting the installation height of the manhole cover device 10 is formed in an annular shape having a predetermined height so that the upper surface of the cover body 14 is substantially flush with the ground surface on the peripheral edge of the opening. , Made of mortar. Further, a plurality of (three in this case: see FIG. 3) stud bolts 26 projecting a predetermined length upward from the upper end surface of the block body 24 are erected. And such a block body 2
4, the manhole cover device 10 has its receiving frame 1
Outward flange portion 28 integrally provided at the lower end of the second
In this case, the device is placed via a cured material 30 described later, and is fixed by bolts with the plurality of stud bolts 26 so as to be installed in an opening of a manhole.

By the way, as described above, the cured product 30 is interposed between the outward flange portion 28 of the receiving frame 12 and the block body 24. As shown in FIG. 3, a plurality of the cured products 30 (here, 3
Pieces). And such a cured product 3
0, the divided bodies are arranged along the circumferential direction between the three stud bolts 26 erected on the block body 24, so that the block body 24 and the The receiving frame 12 is arranged in a circular shape so as to extend between the surfaces facing the outward flange portion 28. In the drawing, reference numeral 31 denotes an insertion hole through which the stud bolt 26 is inserted.

The cured product 30 is made of a cured resin material. And here, in particular, such a resin material is a two-part resin material, and by mixing with a predetermined curing agent,
Those that cure rapidly at room temperature are used. That is, in the present embodiment, as shown in FIG. 4, the resin material 32 having such rapid curing property and fluidity is used.
Is contained in a predetermined container 36 together with a liquid curing agent 34 for curing the resin material, and the container 36 is
As described above, the quick-curing resin 3 is laid between the receiving frame 12 and the block body 24, and in this state,
As a result, the cured product 30 is generated.

More specifically, the container 36 has an outer bag 38 made of vinyl and having a large capacity and an inner bag 40 made of vinyl and having a small capacity.
It has a double bag structure in which 0 is inserted. Then, in the outer bag 38, the above-described quick-curing resin 32 having fluidity, and in the inner bag 40, the liquid curing agent 34,
Each is enclosed. As a result, the inner bag 40 in which the curing agent 34 is sealed is put into the rapidly curable resin 32 in the outer bag 38.

As the outer bag 38, a material having a storage capacity (volume) that is sufficiently larger than the amount of the quick-curing resin 32 sealed therein is used. The resin 32 is sealed in the outer bag 38 with a considerable margin. On the other hand, the inner bag 40
The storage amount is set to be slightly larger than the amount of the hardening agent 34 sealed therein, so that the hardening agent 34 is sealed in the inner bag 40 in a substantially full state. Thus, in the container 36, the quick-curing resin 32 and the curing agent 34 are accommodated in the container 36 and can be deformed. In such a case, it can be easily arranged in the form shown in FIG.

The quick-curing resin 32 to be sealed in the container 36 is not particularly limited as long as it has the above-mentioned characteristics. Outward flange portion 28
Considering the workability at the time of arranging between the block member 24 and the like, those having a certain degree of viscosity are preferable, and in that respect, for example, an epoxy resin or a urethane resin can be suitably used. It is desirable to use various known compounds that cure those resins.

When the above-mentioned cured product 30 is produced by such a container 36, the container 36 is arranged between the receiving frame 12 and the block 24 in a predetermined form, or Before disposing, the inner bag 40 is ruptured by, for example, pressing with a finger from the top of the outer bag 38, and further, in the outer bag 38, the rapidly curable resin 32 and the curing agent 3
4 and the mixture is agitated and mixed to cure while adjusting the horizontal state of the receiving frame 12. Thus, the lower surface has a shape corresponding to the shape of the upper surface, which is the installation surface of the manhole cover device 10 of the block body 24, while the upper surface forms the cured product 30 having a horizontal surface. Thereby,
The receiving frame 12 is held in a horizontal state on the cured product 30, so that the manhole cover device 10
Is installed horizontally in the opening of the manhole.

As described above, in the installation structure of the manhole cover device according to the present embodiment, between the outward flange portion 28 of the receiving frame 12 and the block body 24, the cured product 30 having an upper surface formed in a horizontal plane is provided. Since the receiving frame 12 is placed horizontally on the cured product 30 by being interposed, a gap is formed between the outward flange portion 28 of the receiving frame 12 and the cured product 30. Such a situation can be completely avoided, whereby bending of the outward flange portion 28 can be effectively prevented when the receiving frame 12 is bolted. As a result, it is possible to completely prevent the inclination angle of the fitting surface 18 of the receiving frame 12 from being distorted by such bolt fixing.

Therefore, according to such an installation structure, the manhole cover device 10 is favorably installed in the opening of the manhole 16 in a state where the receiving frame 12 and the cover 14 can be normally tapered fitted. Therefore, in the installed state, the function by the taper fitting, that is, the excellent function of preventing the lid 14 from rattling and detaching from the receiving frame 12 can be effectively exerted. It is.

Although the exemplary embodiments of the present invention have been described in detail, these are merely examples, and the present invention should not be construed as being limited to only those examples.

For example, in the above-described embodiment, the hardened material 30 has a plurality of divided structures. However, the hardened material 30 is formed into a ring-shaped integrated structure, and at a position corresponding to a stud bolt 26 provided on the block body 24. It is also possible to provide a through hole for allowing the stud bolt 26 to penetrate, and to interpose between the block body 24 and the outward flange portion 28 of the receiving frame 12 in the form shown in FIG. is there.

In the above embodiment, the container 36 has a double bag structure having an outer bag 38 having a large volume and an inner bag 40 having a small volume. Resin 3
2, the hardener 34 is sealed in the inner bag 40. However, the structure of the container is not limited to this. For example, FIG.
As shown in (1), a plurality of spheres 42 made of plastic or the like in which the curing agent 34 is enclosed may be put into the outer bag 38 in which the rapid-curing resin 32 is enclosed. Thereby, not only is the deformation of the container 36 itself easier, but also in such a state that the spheres 42 are substantially uniformly dispersed in the outer bag 38, that is, in the rapidly curable resin 32.
By bursting the spheres 42, the stirring and mixing of the rapidly curable resin 32 and the curing agent 34 can be performed more efficiently. It is needless to say that various materials can be adopted as the material of the members constituting such a container, in addition to the materials described in the above embodiment and the above.

Further, in the above embodiment, the rapidly curable resin 32 is cured in the outer bag 38 of the container 36,
Although the cured product 30 is generated, a predetermined curable material may be cured outside the container to form a cured product.

Further, the curable material contained in such a container 36 is not limited to the one described in the above-mentioned embodiment. For example, cement may be used instead of the rapid-curing resin 32. It is also possible to use water instead of the curing agent 34, and it is also possible to use a one-component or one-component type instead of the two-component or two-component type. .

Further, in the case of a curable material which can be used by impregnating a predetermined member, a holding member which holds the curable material in a state of being impregnated with the curable material is used instead of the container as described above. It is also possible to use.

In addition, in the above embodiment, the receiving frame 12 is mounted on the block body 24 as an adjusting body and fixed with bolts, so that the manhole cover device is installed in the opening of the manhole. Although a specific example of the present invention has been shown, the present invention is also applicable to an installation structure of a manhole cover device in which a receiving frame is directly bolted to a mouth frame provided at an opening of a manhole. Of course, it can be applied to advantage.

In addition, although not enumerated one by one, the present invention
Based on the knowledge of those skilled in the art, various changes, modifications, improvements and the like can be implemented in an embodiment,
It goes without saying that all such embodiments are included within the scope of the present invention, without departing from the spirit of the present invention.

[Brief description of the drawings]

FIG. 1 is an explanatory longitudinal sectional view showing an example of an installation structure of a manhole cover device according to the present invention, and shows a vertical sectional form in a construction state thereof.

FIG. 2 is an enlarged sectional explanatory view of a main part of the installation structure of the manhole cover device shown in FIG.

FIG. 3 is an explanatory plan view of a manhole cover device installed in an opening of a manhole according to the present invention in a construction state.

FIG. 4 is an explanatory diagram showing an example of a container used in the installation structure of the manhole cover device shown in FIG.

5 is a view corresponding to FIG. 3 showing an example in which a cured product having a form different from that formed in the installation structure of the manhole cover device shown in FIG. 1 is used.

FIG. 6 is an explanatory view showing another example of the container used in the installation structure of the manhole cover device shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Manhole cover apparatus 12 Receiving frame 14 Lid 16 Manhole 26 Stud bolt 28 Outward flange part 30 Cured material 32 Rapid curable resin 34 Curing agent 36 Container

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E02D 29/12 E02D 29/14

Claims (1)

(57) [Claims] 1. A manhole cover device configured such that a receiving frame and a lid body are taperedly fitted to each other by bolting with a lower flange portion of the receiving frame placed on a periphery of a manhole opening. In a structure to be installed in the opening of the manhole, between the lower flange portion of the receiving frame and the peripheral portion of the manhole opening, a curable material having fluidity that can be appropriately cured is contained or Laying the held deformable housing / holding body, and curing the curable material inside or outside the housing / holding body while adjusting the arrangement state of the receiving frame by deformation of the housing / holding body. Characterized in that the fixed state of the receiving frame is maintained by the generated cured product, and the bolt is fixed.