JP2981054B2 - Lid for underground structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover for an underground structure, and more particularly, to a cover for an underground structure having an uneven pattern on its surface.

The term "cover for underground structures" as used in the specification of the present application refers to a large iron cover, a manhole cover, a sewage basin cover for closing an opening through an underground buried object, underground structure facility, etc. in the sewer and the ground. Opening / closing iron lids for open / closed gutters that protect underground facilities equipment and wiring in power and communications, iron lids for power transmission, iron lids for distribution, buried conduits under the road surface for water supply and gas piping, and their attached equipment and A fire hydrant lid, a water control valve lid, a partition valve lid, an air valve lid, a gas piping lid, a water meter lid, and the like, which function as an opening / closing door that connects the two.

[0003]

2. Description of the Related Art Conventionally, underground buried objects in sewers,
Manhole covers, sewage basins, and the like are widely used to close openings between underground structural facilities and the ground.

[0004] As such underground structures for the lid, cast iron
Although concrete lid filled with concrete cast iron frame in addition to manufacturing the lid is used, for this, merely centered the function of closing the opening was the main. However, addition of anti-slip during rain, particularly in recent years, in order to improve the urban aesthetic lid to form a variety of concave and convex pattern on the surface came to be required.

[0005] about forming such a concave and convex pattern
While it is possible to some extent to form a fine pattern in accordance with the cast iron lid der lever, various requirements Te is offend the streets paved by recent tile like. In addition, cast iron lids require a large amount of equipment and skilled workers, such as a mold for forming an uneven pattern on the surface and a sand mold and a melting furnace for melting iron, especially when producing a large variety of small quantities. Not suitable for

On the other hand, as a lid that can be manufactured without a melting furnace or the like, a lid in which fluid concrete or synthetic resin is poured into a mold and hardened is known.

[0007]

However, concrete lids are fragile and easy to break even if an uneven pattern is formed on the surface, and fine patterns appear due to coarse aggregate particles such as sand. It is extremely difficult. On the other hand, although the lid made of a synthetic resin can show a fine uneven pattern on the surface, it is inferior in weather resistance and abrasion resistance, and cannot be used particularly in places with heavy traffic.

[0008] Therefore, an object of the present invention is to solve the above-mentioned problems in the lid for underground structures,
An underground structure that can be manufactured with simple equipment, has excellent fracture resistance, weather resistance, and wear resistance compared to concrete and synthetic resin lids, and can also form fine uneven patterns It is to provide a lid for use.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a cover for an underground structure according to the present invention has a concave frame composed of a bottom plate and a side plate and a flat mold for forming an uneven pattern. The non-shrinkable mortar is filled and hardened in the mortar filling space formed by the plate and the mortar by releasing the mold plate.
On the surface of the layer, the uneven pattern of the template appears, and the mortar
A lid for an underground structure in which a layer and the frame are integrated , wherein the entire side surface of the mortar layer is on the side of the frame.
It is characterized by being covered with a plate . Further, the lid for underground structure of the present invention has a concave frame composed of a bottom plate and a side plate.
And mortar formed by a flat template for forming uneven patterns
Filling and curing non-shrinkable mortar in the filling space,
By releasing the template, the mortar layer
The mortar layer and the frame
A lid for an underground structure integrating the
The tall layer is aligned with the mounting holes in the frame.
The positioned locking member is insert-molded,
The handle shall be attached to the locking member so that it can move up and down.
Can be. Further, the handle is in the closed state.
Of the mortar layer so that the head does not protrude from the upper surface of the mortar layer.
The handle can be screwed into the locking member.
The handle is rotated to move it up and down
It can also be done.

[0010]

In the lid for an underground structure according to the present invention, a bottom plate and a side plate are provided.
Due to the use of non-shrink mortar as the material for filling the empty portion mortar filling formed by the concave frame and a flat template, it does not require equipment such as furnaces and sand production consisting of it becomes possible, also different from the concrete or the like particles also becomes large strength after fine der because curing. Sa
In addition, the entire side of the mortar layer is covered with the side plate of the frame.
And for that, the lid and the ratio of the manufactured concrete and synthetic resin
In comparison, it has excellent fracture resistance and wear resistance. Also,
In the lid for underground structure of the present invention, the mortar layer includes:
Engagement positioned to align with mounting holes in frame
Material is insert-molded and the handle is
Since it is mounted so that it can be moved downward, when opening the lid,
And lift the lid to open it easily
be able to.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments shown in the drawings.

FIG. 1 is a perspective view of an underground structure lid 1 according to one embodiment of the present invention, FIG. 2 is a bottom view of the underground structure lid 1, and FIG. 3 is an underground structure lid 1 of FIG. Is a vertical cross-sectional view showing a use state in which is disposed on a lower basin 16 disposed above a small-diameter sewage basin 15 in the house , FIG.
FIG. 2 is a cross-sectional view illustrating a manufacturing process of the underground structure lid 1 of FIG. 1.
There is .

The underground structure lid 1 of this embodiment is shown in FIG.
A stainless steel frame 2 formed in a concave shape by a bottom plate 2b and a side plate 2c, and a flat mold for forming an uneven pattern
The mortar filling space 17 formed with the plate 10 is filled with non-shrinkable mortar and hardened to form a mortar layer.
3 and the frame 2 are integrated and shown in FIG.
The <br/> to the formation of the uneven pattern 4 on the surface of the mortar layer 3 has a main configuration as.

[0014] The frame 2 is circular concave stainless steel having a thickness of 1.2 mm, the mounting hole 5 of the two portions, the central and hole 5a of the mortar filled around the bottom plate 2b provided on the bottom plate 2b ing. In addition, the mortar is
A nut 6 as a locking member is welded to the layer 3 side.

[0015] On the surface of the mortar layer 3, uneven pattern 4 is formed in terms of aesthetics improving and anti-slip. In order to produce a fine uneven pattern 4 having excellent fracture resistance, a non-shrinkable mortar having good flowability without using coarse aggregate is used as a filling material. To reduce calcium and ensure strength after curing
HiJaster (registered trademark) containing a sulfo-aluminate-based expanding agent was used. The mortar layer 3 after hardening is firmly and tightly integrated with the entire surface of the bottom plate 2b and the side plate 2c of the frame 2. Also, the mortar layer 3, the mounting hole 5 part of the frame 2, the nut 6 is welded are insert-molded, the nut 6
A handle 8 is screwed from the mortar layer 3 side via a rubber washer 7, and a retainer split pin 8 a is provided at a lower end of the handle 8.

The handle 8 does not protrude from the upper surface of the mortar layer 3 as shown in FIG. 3 in a normal state in which the lid 1 for an underground structure of the present embodiment is installed on the lower box 16. However, when the lid is opened, a coin or a driver is engaged with the head 8b of the handle 8 and rotated to raise the handle 8 as shown in FIG. Then, the handle 8 is opened by grasping the head 8b or the lower part of the head 8b .

At this time, it is not necessary to raise the handle 8 until the retaining pin 8a comes into contact with the frame 2, but it is sufficient to raise it so that it can be gripped.

Next, a method for manufacturing the lid for underground structure of the above embodiment will be described with reference to FIG.

FIG. 5A shows a substrate 10a and this substrate 1
0a shows a template 10 for forming a concave / convex pattern formed of a concave / convex pattern layer 10b fixed to the upper surface of the frame 10a. The template 10 is assembled in a manner corresponding to the position of the nut 6 welded to the mounting hole 5 of the frame 2. A hole 11 is drilled.

Next, as shown in FIG.
A screw 13 is inserted into the assembling hole 11 from the substrate 10a surface side of the substrate 10 to penetrate the uneven pattern layer 10b side.
A resin cone 12 having a and having a female screw portion 12b formed therein is screwed into a screw 13.

[0021] Then, as shown in FIG. (C), the mold plate 10 to the frame <br/> arm 2 downwards, the nut 6 which further welded to the frame 2 coincides with the axis of the cone 12 Put on. In this state, screw 13 is closed again and frame 2
And the template 10 are clamped by a clamper or the like (not shown).

In this state, the above-mentioned fluid high adjuster is filled into the mortar filling space 17 formed by the frame 2 and the template 10 from the mortar filling hole 5a formed in the bottom plate 2b of the frame 2. And cure. After about 1 hour from filling, the clamper is released and the template 1
The template 10 is removed from the mortar layer 3 while the screw 13 and the cone 12 are attached to 0. At this time, the mortar layer 3 after curing is applied to the bottom plate 2 b and the side plate 2 of the frame 2.
c is firmly adhered to and integrated with the entire surface of c .

Next, after the handle 8 is screwed into the nut 6 from the mortar layer 3 side, the retaining pin 8a is attached to complete the lid 1 for the underground structure. In addition, if necessary, mix the pigment into the high juster and color it in various colors, add a color pattern, or apply a surface treatment such as matting by shot blasting to give the surface design a change, It can correspond to the diversity of urban aesthetics.

As described above, the underground structure lid 1 of this embodiment is
Can form the fine uneven pattern 4 which is excellent in fracture resistance, weather resistance and abrasion resistance and which is excellent in aesthetic appearance without requiring any particularly large-scale equipment and skilled workers.

Although the present embodiment has been described with reference to the case where the plane shape is circular, the present invention is of course not limited to this, and various shapes such as a rectangle and an ellipse are possible. In addition, the lid for underground structures of the present invention can be used not only for closing lower cavities provided in houses but also for closing openings of various underground buried objects provided on public roads.

[0026]

According to the lid for underground structures of the present invention, the following effects can be obtained.

(1) A mole formed by a concave frame composed of a bottom plate and a side plate and a flat template for forming an uneven pattern.
Since the hollow portion for barrel filled only cured filled with non-shrink mortar, a wide variety of land simply by replacing the mold plate
The lid for the lower structure can be easily manufactured, and large-scale equipment and skilled personnel are not required. Also, concrete etc.
Unlike the fine particles, the strength after curing is high.
And the entire side of the mortar layer is the side plate of the frame
Because it is covered, chipping resistance as compared with concrete and synthetic resin underground structures lid, that Do have excellent weather resistance and abrasion resistance.

(2) Since an uneven pattern can be formed finely,
Patterns corresponding to the variety of urban aesthetics can be easily formed, and they are also excellent in preventing slippage.

(3) In order to use a non-shrinkable mortar,
It is easy to integrate with the frame, and furthermore, it becomes more excellent in strength by being integrated.

( 4) Insert molding in mortar layer
The handle is attached to the locking member so that it can move up and down.
When opening the lid, raise the handle and grasp it.
Can be easily opened.

[Brief description of the drawings]

FIG. 1 is a perspective view of a lid for an underground structure of the present embodiment.

FIG. 2 is a bottom view of the lid for the underground structure shown in FIG.

FIG. 3 is a longitudinal sectional view showing a state where the lid for underground structure of FIG. 1 is attached to a lower box.

FIG. 4 is an enlarged sectional view of a handle portion.

FIG. 5 is a cross-sectional view for explaining a manufacturing process of the lid for the underground structure shown in FIG.

[Explanation of symbols]

Reference Signs List 1 cover for underground structure 2 frame 2b bottom plate 2c side plate 3 mortar layer 4 uneven pattern 5 mounting hole 5a hole 6 nut (locking member) 7 rubber washer 8 handle 8a retaining split pin 8b head 10 template 10a substrate 10b Concavo-convex pattern layer 11 Assembly hole 12 Cone 12a Convex part 12b Female screw part 13 Screw 15 Small-diameter wastewater basin 16 Lower basin 17 Empty space for mortar filling

Claims (4)

(57) [Claims] 1. A bottom plate and side plates and is filled cure the non-shrink mortar empty portion mortar filling formed by the concave frame a flat template for uneven pattern formed consisting of the type
By releasing the plate, the mold is placed on the surface of the mortar layer.
The uneven pattern of the board appears, the mortar layer and the frame
For an underground structure, wherein the entire surface of the side surface of the mortar layer is covered with a side plate of the frame . lid. 2. A concave frame comprising a bottom plate and a side plate.
Mortar formed with a flat template for forming uneven patterns
Filling the filling space with non-shrinkable mortar and curing,
By releasing the plate, the mold is placed on the surface of the mortar layer.
The uneven pattern of the board appears, the mortar layer and the frame
And a lid for an underground structure, wherein the mortar
Layer is aligned with the mounting holes in the frame.
The inserted locking member is insert-molded,
Make sure that the handle is attached to the stopper so that it can move up and down.
Characteristic lid for underground structures. 3. The handle of the handle when the handle is closed.
Part is provided so as not to protrude from the upper surface of the mortar layer.
The lid for an underground structure according to claim 2, which is provided. 4. The grip is screwed to the locking member.
And move it up and down by rotating this handle
The underground structure according to claim 2 or 3, which is configured as follows.
Artificial lid.