JP3798152B2 - Manhole that fixes the lid to the frame - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a manhole for an underground structure such as an upper water groove, a lower water groove, an electric wire, a gas pipe, and the like, in which a lid is fixed to a receiving frame with a bolt.
[0002]
[Prior art]
The receiving frame and lid of the conventional manhole are made of casting, and a hole is formed in the lid, a screw hole is formed in the receiving frame, a bolt is inserted into the hole in the lid, and a bolt is screwed into the screw hole in the receiving frame. ing. And the screw hole of a receiving frame provides the hole corresponding to the hole of the edge part of a lid | cover at the time of shaping | molding with a casting_mold | template, and the hole is threaded.
[0003]
[Problems to be solved by the invention]
In casting, when cooling after casting, there is a difference in the degree of shrinkage when the shape is different, and it is very difficult to accurately match the screw hole at the bottom of the receiving frame and the hole at the lid edge. If there is some difficulty in the rotation of the insertion and the tightening requires a lot of force or is severe, the hole or screw hole must be corrected, and if the hole or screw hole is corrected, the lid and There is a risk of loosening in fixing to the receiving frame.
In addition, the bolt is inserted and screwed into the hole of the lid and the screw hole of the receiving frame to fix the receiving frame and the lid, so if the lid and the receiving frame are rusted, the bolt will be in the hole of the lid and the screw hole of the receiving frame. It becomes rusted and difficult to remove, so it is difficult to open the lid.
[0004]
The present invention provides insertion holes in both the lid and the receiving frame, and does not require strict accuracy in the corresponding positions of the holes in the casting of the lid and the receiving frame, and also ensures that the lid and the receiving frame are fixed. Another object of the present invention is to provide a manhole in which the bolts are not likely to rust in the holes of the lid and the receiving frame.
[0005]
[Means for Solving the Problems]
In the invention of claim 1, the manhole is
Tightening bolts and nuts,
A nut receiver having a recess capable of storing the nut with a gap on the side periphery, a flange provided at two opposing opening edges, and a hole for inserting a bolt or a screw nail into the flange. Zodiac,
A lid provided with a fool hole having a diameter larger than the diameter of the fastening bolt at the edge;
Bottom, or in a shelf provided on the inner direction the inner edge of the bottom, at a position corresponding to the clearance hole of the lid is provided with a clearance hole of larger diameter than the diameter of the fastening bolts, on the periphery of the clearance hole, wherein A receiving frame provided with a screw hole corresponding to the hole of the flange of the nut receiving seat;
Bolts or screw nails for inserting and screwing into the holes and screw holes in correspondence with the holes of the flange and the screw holes of the receiving frame;
The nut is accommodated in the recess of the nut receiving seat, the flange opening of the nut receiving seat faces the bottom or shelf of the receiving frame, and the hole of the flange and the bottom or shelf of the receiving frame The bolt holes or screw nails are screwed to face each other, the nut receiving seat is fixed to the bottom or shelf of the frame, the lid is fitted to the receiving frame, and the lid hole at the edge of the lid Insert the tightening bolt into the bottom, insert the tip into the bottom of the frame or the hole in the shelf, and screw into the screw hole of the nut stored in the nut receiving frame to fix the lid to the frame It is possible to do.
[0006]
In the invention of claim 2, the manhole is
Tightening bolts and nuts,
A shelf provided inward on the inner edge of the bottom or the bottom, having a recess capable of storing the nut with a gap on the side periphery thereof on a shelf provided inward on the inner edge of the bottom or bottom In addition, a fool hole having a diameter larger than the diameter of the tightening bolt, which penetrates the bottom of the recess, and a manhole receiving frame provided with a screw hole for a bolt or a screw nail on the outer periphery of the opening of the recess,
Bolts or screw nails for screw holes in the receiving frame;
A hole corresponding to a screw hole for a bolt or screw nail on the outer periphery of the opening of the recess is provided, abutting on the opening edge of the recess, and provided inward on the bottom or the inner edge of the bottom with the bolt or screw nail. A plate that can be fixed to a shelf,
A lid provided with a fool hole having a diameter larger than the diameter of the fastening bolt at the edge;
The nut is housed in the recess, the plate is brought into contact with the opening edge of the recess, the plate is fixed to the bottom or shelf of the receiving frame with the bolts or screw nails, and the lid is fitted to the receiving frame. The fastening bolt is inserted into the flaw hole at the edge of the lid, and the leading end thereof is inserted into the bottom part of the frame or the fool hole of the shelf, and further screwed into the screw hole of the nut accommodated in the recess. The lid can be fixed to the receiving frame.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a manhole according to the present invention will be described with reference to the drawings.
[0008]
A hole 3 is provided at the bottom 2 of the receiving frame 1, and a hole 5 is provided at the edge of the lid 4 corresponding to the hole 3. The diameters of the holes 3 and 5 are larger than the diameter of the fastening bolt 13 and are fool holes.
[0009]
What is shown in FIG. 2 is a member of the fixing device.
(A), (B), and (C) show a nut receiving seat 6, (A) is a sectional view thereof, (B) is a bottom view, and (C) is a plan view.
[0010]
The nut receiving seat 6 is formed by bending a single stainless steel plate to form a rectangular recess 7, and flanges 8 and 8 are formed outwardly on two opposing edges. A hole 9 for a tightening bolt 13 for fastening the lid 4 and the receiving frame 1 is provided at the bottom of the recess 7, and the nut receiving seat 6 is received at the bottom 2 of the receiving frame 1 at each of the two flanges 8. A hole 10 for penetrating a bolt for fixing to the hole is provided. Holes 9 and 10 are stupid holes.
The nut receiving seat 6 may be formed of a casting or a synthetic resin.
The hole 9 is a hole having a diameter slightly larger than the diameter of the fastening bolt 13. The hole 9 need not be provided when the fastening bolt 13 has a length that does not reach the bottom of the recess 7.
[0011]
2 (D) and 2 (E) are nuts 11 to be inserted into the recesses 7 of the nut receiving seats 6, (D) being a sectional view thereof, and (E) being a plan view.
The nut 11 is a square having a size such that when the nut 11 is inserted into the recess 7 of the nut receiving seat 6, the periphery is slightly spaced from the inner wall of the recess 7 and there is play. The nut 11 is generally thinner than the recess 7 to provide play.
Reference numeral 12 denotes a screw hole for the fastening bolt 13.
[0012]
FIG. 2F is a perspective view of the fastening bolt 13.
The head of the tightening bolt 13 is a known triangular bolt in the figure, but it may be a hexagonal bolt or a round bolt with a driver groove on the head.
[0013]
FIG. 2G shows a bolt 14 for fixing the flanges 8, 8 of the nut receiving seat 6 to the bottom 2 of the receiving frame 1. The bolt 14 may be a screw nail.
[0014]
Screw holes 15 and 15 for screwing bolts 14 are provided on both sides of the hole 3 in the bottom 2 of the receiving frame 1 in correspondence with the holes 10 and 10 in the flange 8 of the nut receiving seat 6.
[0015]
When the bottom portion 2 of the receiving frame 1 is of a standard that does not have a space for attaching the nut receiving seat 6, as shown in FIG. 4, a shelf 16 is provided inward on the inner edge of the bottom portion 2. Are provided with a hole 3 for the fastening bolt 13 and screw holes 15 for mounting the nut receiving seat 6.
Reference numeral 17 denotes an internal rising portion of the receiving frame 1.
[0016]
Using the above members, the lid 4 is fixed to the receiving frame 1 as follows.
First, the nut 11 is inserted into the recess 7 of the nut receiving seat 6, the opening of the recess 7 is directed to the bottom 2 or the bottom surface of the shelf 16, and the flanges 8 and 8 are brought into contact with the bottom 2 of the frame 1 or the bottom surface of the shelf 16. The bolts 14 and 14 are screwed into the holes 10, 10, 15, 15 by making the holes 10, 10 of the nut receiving seat 6 correspond to the screw holes 15, 15 of the bottom 2 or the shelf 16. Is fixed to the bottom 2 or the shelf 16.
Further, a part of the contact portion between the bolt 14 and the flange 8 may be fixed by welding.
[0017]
Next, the lid 4 is fitted into the frame 1, the fastening bolt 13 is inserted into the hole 5 of the lid 4, the tip is inserted through the bottom 2 of the frame 1 or the hole 3 of the shelf 16, and then the nut 11 The screw hole 12 is screwed and the bottom hole 9 of the nut receiving seat 6 is inserted.
[0018]
When it is desired to remove the lid 4 from the receiving frame 1, the tightening bolt 13 is turned in the opposite direction and pulled out.
[0019]
The nut receiving seat 6 is fixed to the bottom 2 of the receiving frame 1 or the lower surface of the shelf 16, but the design has a sufficient space between the bottom 2 of the receiving frame 1 or the upper surface of the shelf 16 and the lower surface of the lid 4. Alternatively, the nut receiving seat 6 may be fixed to the bottom 2 and the upper surface of the shelf 16 with the state shown in FIG.
FIG. 3 is a plan view showing a state in which the nut receiving seat 6 is attached to the upper surface of the bottom portion 2 of the receiving frame 1.
When the receiving frame 1 of FIG. 3 is covered, if the lower end of the periphery of the cover 4 abutting against the bottom 2 of the receiving frame 1 hits the nut receiving seat 6 and the cover 4 cannot be closed, the lower end of the periphery of the cover is A notch is provided so that the lower end of the periphery of the lid does not hold the nut receiving seat 6.
[0020]
There is a space between the periphery of the nut 11 and the inner wall of the recess 7 of the nut receiving seat 6, that is, there is play, and the hole 9 at the bottom of the recess 7 is larger than the diameter of the tightening bolt 13. 5, the holes 3, the screw holes 12, and the holes 9 can be easily handled, and therefore, the fastening bolts 13 can be easily screwed and inserted into them.
Although there is a gap between the periphery of the nut 11 and the inner wall of the recess 7, the bottom of the receiving frame 1 or the bottom surface of the shelf 16 is strongly attached to the bottom of the nut receiving seat 6. It is attracted and fixed. Thereby, the lid 4 is fixed to the receiving frame 1.
[0021]
FIG. 5 shows another embodiment.
When the bottom portion 2 of the receiving frame 1 has a sufficient thickness, it is partially thickened, and a recess 7a is provided in which the nut 11 can be stored with a margin as described above. Similar to the previous embodiment, a shelf may be provided inward on the inner edge of the bottom 2 and the recess 7a may be provided on the shelf.
Although the opening of the recess 7a is provided downward in the drawing, it may be opened upward.
Then, the bottom hole 2 or the shelf at the bottom of the recess 7a is passed through the fool hole 3 having a diameter larger than the diameter of the tightening bolt.
[0022]
Then, a hole 9a through which the tip of the tightening bolt 13 can be inserted with a margin is provided, and a plate 19 provided with holes 18 for the bolts 14 on both sides thereof is placed in the recess 7a. The bolts 14 or screw nails are screwed into and fixed to the holes 18 and the corresponding screw holes 20 provided in the bottom 2 or the shelf 16.
The hole 9a may not be provided when the fastening bolt 13 has a length that does not reach the plate 19.
[0023]
In the case of the apparatus shown in FIG. 5 as well, in the same manner as in the above-described embodiment, the cover hole 5 of the lid 4, the cover hole 3 of the bottom part 2 of the receiving frame 1, and the screw hole 12 of the nut 11 are correspondingly tightened. It is easy to insert and fasten the attached bolt 13.
[0024]
When the fastening bolt 13 is inserted into the hole 5 of the lid 4, if the packing 21 and the washer 22 are attached, it is possible to prevent water from flowing from the hole 5 into the manhole.
[0025]
The fastening bolt 13 and the nut 11 are preferably made of a material that does not rust, such as stainless steel.
[0026]
【The invention's effect】
The manhole according to the present invention does not need to accurately correspond the hole of the lid and the hole of the bottom of the receiving frame. There is no need to modify the hole after casting, the lid and the receiving frame can be fixed easily and reliably, and the manufacturing cost is low .
Also, the bolt insertion holes on the lid and the receiving frame are fool holes, and the holes on the lid and the receiving frame are not threaded, so even if the casting rusts, the fastening bolts rust on the holes in the lid and the receiving frame. There is no fear, so it is easy to remove the clamping bolt and open the lid.
[Brief description of the drawings]
FIG. 1 is an explanatory sectional view of a state in which a lid and a receiving frame are fixed by a fixing device.
FIG. 2 is an exploded view of the fixing device.
FIG. 3 is a plan view of a receiving frame.
FIG. 4 is a plan view of an essential part of a receiving frame provided with a shelf.
FIG. 5 is an explanatory cross-sectional view of a state in which a lid and a receiving frame of another embodiment are fixed by a fixing device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Receiving frame 2 Bottom part 3 Flaw hole 4 Cover 5 Flaw hole 6 Nut receiving frame 7 Recessed part 8 Flange 9 Hole 10 Hole 11 Nut 12 Screw hole 13 Tightening bolt 14 Bolt 15 Screw hole 16 Shelf 17 Internal rising part 18 Hole 19 Plate 20 Screw hole 21 Packing 22 Washer

Claims (2)

Tightening bolts and nuts,
A nut receiver having a recess capable of storing the nut with a gap on the side periphery, a flange provided at two opposing opening edges, and a hole for inserting a bolt or a screw nail into the flange. Zodiac,
A lid provided with a fool hole having a diameter larger than the diameter of the fastening bolt at the edge;
Bottom, or in a shelf provided on the inner direction the inner edge of the bottom, at a position corresponding to the clearance hole of the lid is provided with a clearance hole of larger diameter than the diameter of the fastening bolts, on the periphery of the clearance hole, wherein A receiving frame provided with a screw hole corresponding to the hole of the flange of the nut receiving seat;
Bolts or screw nails for inserting and screwing into the holes and screw holes in correspondence with the holes of the flange and the screw holes of the receiving frame;
The nut is accommodated in the recess of the nut receiving seat, the flange opening of the nut receiving seat faces the bottom or shelf of the receiving frame, and the flange hole and the bottom of the receiving frame or shelf With the screw holes facing each other, the bolts or screw nails are screwed in, and the nut receiving seat is fixed to the bottom or shelf of the frame, the lid is fitted to the receiving frame, and the lid hole at the edge of the lid Insert the tightening bolt, insert the tip of the bolt into the bottom of the frame or the hole in the shelf, and screw it into the screw hole of the nut stored in the nut receiving frame to fix the lid to the frame. Manhole that made it possible. Tightening bolts and nuts,
A shelf provided inward on the inner edge of the bottom or the bottom, having a recess capable of storing the nut with a gap on the side periphery thereof on a shelf provided inward on the inner edge of the bottom or bottom In addition, a fool hole having a diameter larger than the diameter of the tightening bolt, which penetrates the bottom of the recess, and a manhole receiving frame provided with a screw hole for a bolt or a screw nail on the outer periphery of the opening of the recess,
Bolts or screw nails for screw holes in the receiving frame;
A hole corresponding to a screw hole for a bolt or screw nail on the outer periphery of the opening of the recess is provided, abutting on the opening edge of the recess, and provided inward on the bottom or the inner edge of the bottom with the bolt or screw nail. A plate that can be fixed to a shelf,
A lid provided with a fool hole having a diameter larger than the diameter of the fastening bolt at the edge;
The nut is accommodated in the recess, the plate is brought into contact with the opening edge of the recess, the plate is fixed to the bottom or shelf of the receiving frame with the bolts or screw nails, the lid is fitted to the receiving frame, Insert the tightening bolt into the hole on the edge of the lid, insert the tip of the bolt into the bottom of the frame or the hole on the shelf, and screw it into the screw hole of the nut stored in the recess. Manhole that made it possible to fix the lid to the frame.

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