JPH10231821A - Adjustable fixture and installation structure of manhole cover receiver frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To freely change angles of a nut and a washer against a bolt by respectively making upper surfaces, lower surfaces or both surfaces of the nut and the washer on an adjustable fixture consisting of the bolt, the nut and the washer in curved surfaces. SOLUTION: A lower surface of a nut 2 is bulged in a circular arc shape, and a curved surface 2a is formed on its surface. A ring recessed curved surface 3a on an upper surface central part of which the curved surface 2a of the lower surface of the nut 2 is closely attached is provided in the periphery of a central part hole 4 on a washer 3. In case of using it, as the curved surface 2a of the lower surface of the nut 2 to be screwed on a bolt 1 makes contact with the curved surface 3a of the upper surface of the washer 3, it is possible to freely change an angle of the nut 2 against the washer 3. Consequently, it is possible to closely attach the washer 3 on the whole of the surface of a member to be fastened in parallel and widely and to disperse a load applied on the washer 3 and the nut 2 all over them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adjusting fixture capable of freely adjusting a height and a mounting angle, and a mounting structure of a manhole cover receiving frame in which a manhole cover receiving frame is fixed to a manhole using the adjusting fixture. It is about.

[0002]

2. Description of the Related Art A conventional fixing fixture for adjusting the height, angle and the like of this kind, and a lid receiving frame of a manhole installed on an inclined surface or the like are attached to the manhole body using this kind of adjusting fixture. As a fixing structure, for example, Japanese Unexamined Patent Publication No.
Japanese Patent Application Laid-Open No. 5-1426 discloses a technique for combining a rotatably configured bolt with a long hole,
Technology for mounting double nuts on bolts
As shown in Japanese Patent No. 3956, a technique such as a technique of combining a bolt having a curved head with a lid receiving frame having a curved receiving portion is known.

[0003]

However, the technique of combining the long hole and the rotatable bolt according to the above-mentioned Japanese Patent Application Laid-Open No. 2-31622 has a problem that the bolt is expensive and the cost is high. Further, the technique of attaching a double nut to a bolt according to Japanese Patent Application Laid-Open No. 5-1426 has a problem that it cannot be used if it is used at a certain inclination angle or more. Further, the technique according to Japanese Patent Application Laid-Open No. H08-113965 requires a special curved surface receiving portion to be formed on the surface of the lid receiving frame, so that the processing is complicated and the cost is increased.

The mounting structure of the adjusting fixture and the manhole cover receiving frame according to the present invention is a completely new technique developed in view of the above-mentioned many problems as described above, and particularly, a nut and a washer to be mounted on a bolt. By forming the upper surface or lower surface in a curved shape, the angle of the nut and the washer with respect to the bolt can be freely changed, and the manhole cover receiving frame can be arbitrarily set by using the adjusting device. It is an object of the present invention to provide a technique with a mounting structure of a manhole cover receiving frame which can be mounted on a manhole body at a mounting angle.

[0005]

SUMMARY OF THE INVENTION An adjusting fixture according to the present invention is a technique which fundamentally solves the above-mentioned conventional problems, and the gist of the present invention is a height comprising bolts, nuts and washers. And the mounting angle adjusting fixture, wherein the upper surface, the lower surface, or both surfaces of the nut and the washer are each formed in a curved shape.

The mounting structure of the manhole cover receiving frame according to the present invention is a technique which fundamentally improves on the above-mentioned conventional problems, and the gist of the first invention is that a bolt is attached to the upper end of the manhole body. In the structure in which the manhole cover receiving frame is attached to the manhole, the nut and the washer whose upper surface, lower surface, or both surfaces are formed in a curved surface are mounted on the bolt, and the manhole cover receiving frame is mounted on the manhole body while adjusting the height and the mounting angle. This is a mounting structure for a manhole cover receiving frame, which is fixed.

[0007] The gist of the second invention of the mounting structure of the manhole cover receiving frame according to the present invention is characterized in that mortar is filled in a gap between a nut and a washer mounted on the bolt and the manhole body. 1 is a mounting structure of a manhole cover receiving frame according to the first invention.

The gist of the third invention of the mounting structure of the manhole cover receiving frame according to the present invention is that one or more height adjusting washers are interposed in a gap between the nut and the washer mounted on the bolt and the manhole body. A mounting structure for a manhole cover receiving frame according to the first aspect of the present invention, wherein the mounting structure is configured as described above.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the structure of the adjusting fixture according to the present invention; FIG. FIG. 2, FIG. 2 is an explanatory view of the parts in FIG. 1, and FIG.
FIG. 4 is a longitudinal sectional view showing a state in which a manhole cover receiving frame is mounted by using the parts shown in FIG.

In FIGS. 1 and 2, 1 is a bolt, 2 is a nut which can be screwed to the bolt 1, and 3 is a washer. The lower surface of the nut 2 bulges in an arc shape to form a curved surface 2a on the surface. In the center of the upper surface of the washer 3, a curved surface 2a on the lower surface of the nut 2 is provided.
The ring-shaped concave surface 3a which can be in close contact
Is drilled around.

Therefore, when the adjustment fixture according to the present invention is used, the curved surface 2a on the lower surface of the nut 2 screwed to the bolt 1 comes into contact with the curved surface 3a on the upper surface of the washer 3, so that the washer 3 The angle of the nut 2 can be freely changed. Further, the curved surface 2a on the lower surface of the nut 2 and the curved surface 3a on the upper surface of the washer 3 are almost completely in contact with each other even if the direction of the nut 2 changes. 2 can be widely distributed to the washer 3.

In the embodiment described above, the projecting curved surface 2a is provided on the lower surface of the nut 2, and the concave curved surface 3a is provided on the upper surface of the washer 3. However, these are reversed and combined. It is also possible. Also, nut 2
Each of the washer 3 and the washer 3 can be provided with a curved surface 2a, 3a not only on its lower surface but also on its upper surface.

FIG. 3 is an explanatory view showing a state in which the manhole cover receiving frame is attached to the manhole by using the above-mentioned adjusting fixture according to the present invention, wherein the manhole cover receiving frame 6 placed on the manhole main body 5 has the aforementioned structure. It is attached and fixed to the manhole body 5 via an adjustment fixture.

That is, a lower nut 2 is screwed into a predetermined position of a bolt 1 which is screwed at a lower portion to an anchor bolt (not shown) embedded in the manhole body 5 and which stands upright on an upper edge of the manhole body 5. A lower washer 3 is mounted on the lower nut 2 and the curved surfaces 2a and 3a of the nut 2 and the washer 3 are in close contact with each other.

A peripheral edge 6a of the manhole cover receiving frame 6 is placed on a lower washer 3, and the bolt 1 is inserted through a hole 7 provided in the peripheral edge 6a.
An upper washer 3 is placed on the peripheral edge 6a, and an upper nut 2 is placed on the washer 3.
Are screwed to the bolt 1, and the curved surfaces 2 a and 3 a of the nut 2 and the washer 3 are configured to be in close contact with each other.

The gap between the upper edge of the manhole body 5 and the manhole cover receiving frame 6 is filled with mortar 8. In the above-described mounting structure of the manhole cover receiving frame according to the present invention, the peripheral edge 6a of the manhole cover receiving frame 6 has the lower nut 2
The height of the manhole cover receiving frame 6 can be freely adjusted by changing the screwing position of the nut 2 with respect to the bolt 1 because it is supported by the washer 3.

Further, with respect to the nut 2 screwed to the vertically erected bolt 1, the washer 3 mounted on the nut 2 can have any mounting angle corresponding to the manhole cover receiving frame 6. Therefore, the washer 3 can be brought into close contact with the peripheral edge 6a of the manhole cover receiving frame 6 installed in parallel along the inclined surface. For this reason, the load can be dispersed and received by the entire washer 3 of the manhole cover receiving frame 6, and the load applied to the washer 3 can be dispersed and transmitted to the entire curved surface 2a of the nut 2 over the entire curved surface 3a. .

On the peripheral edge 6a of the manhole cover receiving frame 6,
The upper washer 3 and the nut 2 are mounted respectively, and the nut 2 is screwed to the bolt 1, and the peripheral edge 6 a of the manhole cover receiving frame 6 is fastened by the washer 3 from above. The upper washer 3 is also provided on the nut 2 with these curved surfaces 3a,
Since the washer 3 is in close contact, the entire surface of the washer 3 can be brought into close contact with the peripheral edge 6a. Therefore, no distortion or breakage occurs in the washer 3 and the peripheral edge 6a. Further, even when the bottom surface 6b of the cover receiving frame 6 of the manhole is inclined, the outer peripheral surface of the bolt 1 is configured not to contact the inner peripheral surface of the washer 3.

In the above embodiment, the manhole body 5
The mortar 8 is filled in the gap between the upper edge of the manhole and the manhole cover receiving frame 6, but as shown in FIG.
A plurality of height adjusting washers 9 and mortar may be interposed between the upper edge of the upper frame and the lower nut 2 supporting the manhole cover receiving frame 6.

A plurality of height adjusting washers 9 having different thicknesses are prepared, and by appropriately combining them, a gap formed between the lower nut 2 and the upper edge of the manhole body 5 can be reduced. The height adjustment washer 9 is buried so that the lower nut 2 and the washer 3 can be supported in a more stable state.

The height-adjusting washer 9 is provided with a U-shaped cut groove 10 from a side edge. And can be attached to the bolt 1. Therefore, the lower nut 2
After the height of the manhole cover receiving frame 6 is defined by the above, the gap formed between the nut 2 and the upper edge of the manhole body 5 is height-adjusted by these height adjustment washers 9,
Mortar filling can be simplified.

[0022]

The mounting structure of the adjusting fixture and the hole cover receiving frame according to the present invention has the above-described configuration and operation.
It has the following tremendous effects.

(1) Since a curved surface is provided on a predetermined surface of the nut and the washer, the nut and the washer can be in close contact with each other with a curved surface. (2) Therefore, the mounting angle of the washer with respect to the nut screwed to the bolt can be freely changed. (3) Therefore, the washer can be widely and closely contacted in parallel with the entire surface of the member to be tightened.

(4) The load applied to the washer and the nut can be dispersed throughout. (5) Since the entire configuration is simple, mass production can be performed at low cost. (6) It is easy to handle when used.

(7) When these curved nuts and bolts are used for mounting the manhole cover receiving frame,
The height and mounting angle of the manhole frame can be easily and accurately defined. (8) Distortion and breakage of the peripheral edge of the manhole cover receiving frame, the washer and the nut can be prevented. (9) The gap between the upper edge of the manhole body and the lower nut supporting the manhole cover receiving frame can be easily filled by inserting mortar or a height adjusting washer.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a component configuration of an adjustment fixture according to the present invention.

FIG. 2 is an explanatory view of the components in FIG. 1;

FIG. 3 is a longitudinal sectional view of a state in which a manhole cover receiving frame is mounted using the components of FIG. 1;

FIG. 4 is a longitudinal sectional view showing a state where a manhole cover receiving frame of another example is mounted.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Bolt 2 Nut 3 Washer 2a, 3a Curved surface 4 Hole 5 Manhole body 6 Manhole cover receiving frame 6a Peripheral edge 6b Bottom 7 Hole 8 Mortar 9 Height adjustment washer 10 Cut groove

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kuniyuki Ichikawa 1-22-2 Nishishinjuku, Shinjuku-ku, Tokyo Haneda Hume Kanko Co., Ltd.

Claims (4)

[Claims] In a height and mounting angle adjusting fixture comprising a bolt, a nut and a washer, an upper surface, a lower surface or both surfaces of the nut and the washer are respectively formed in a curved surface. And adjustment fixture. 2. A structure in which a manhole cover receiving frame is attached to an upper end of a manhole body via a bolt, wherein a nut and a washer whose upper surface, lower surface, or both surfaces are formed in a curved surface are attached to the bolt, and the manhole cover receiving frame is attached to the manhole. A mounting structure for a manhole cover receiving frame, which is fixed to a main body while adjusting a height and a mounting angle. 3. The mounting structure for a manhole cover receiving frame according to claim 2, wherein mortar is filled in a gap between the nut and a washer mounted on the bolt and the manhole body. 4. A manhole cover receiving frame according to claim 2, wherein one or more height-adjusting washers are interposed in a gap between the nut and the washer attached to the bolt and the manhole body. Mounting structure.