JPH0333793Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to an iron cover installed on the ground surface of a manhole such as a sewerage system.

(Prior art) In conventional iron covers for manholes in sewers, etc., a crow hole into which the tip of a crowbar is inserted is inserted into the cover in order to open the cover, which is fitted into a receiving frame. It was placed on the outer edge. In addition, a keyhole for unlocking the locking mechanism for locking the lid to the receiving frame was provided in the lid.

In Utility Model Application Publication No. 57-197543, since the pivot pin, the burl pressure receiving surface, and the engaging portion are integrally molded, there is a fairly wide gap between the burl hole of the lid body and the burl pressure receiving surface. However, rainwater and sewage that falls on the lid body flows down into the manhole through the crowbar hole, so it has the disadvantage that it is not an airtight iron lid.

(Problem that the invention aims to solve) In this conventional iron cover, rainwater enters the manhole through the crowbar hole, keyhole, etc. drilled in the iron cover, and as a result, rainwater mixes with the sewage. However, since the increased volume of sewage mixed with this rainwater must be treated at a sewage treatment plant, the processing capacity of the sewage treatment plant must be increased, and the cost of equipment and land for the sewage treatment plant will increase enormously. There was a drawback that I got used to it. In addition, when the plug is supported by a rotating mechanism to seal the hole drilled in the lid, the rotation trajectory of the plug prevents the inner slope of the receiving frame and the hole in the lid from coming into contact with the plug. As a result, the shape becomes complicated, and there is a drawback that the plug cannot seal the hole only by pinching foreign matter such as small sand or dirt.

(Means for solving the problem) An outer inclined portion 1 that fits into an inner inclined portion 2 of a receiving frame 1
1, a notch 13 that fits into the stopper 30, and a key stick 4.
A lid part 10 is provided with a seat groove 17 that engages the head of the key 0 and is provided inside the notch part 13 at right angles to the diametrical direction, and a long hole 18 that engages with the notch part 42 of the key stick 40;
Plug bodies 30 provided oppositely on both sides of the back surface of the lid part 10
guide walls 14, 14, and notch 13 of cover plate 10.
A protruding piece 1 is protruded from the cover plate 10 so as to face each other at an inner position thereof, and has semicircular seats 15a and 16a on the opposing surfaces.
5, 16, the notch portion 13 and the inner peripheral inclined portion 2 of the receiving frame 1
A plug body 30 is provided with a connecting part 32 that fits between the slots 22 of the cylinder body 21 and a ball part 31 that fits in the hole 21a of the cylinder body 21, and a plug body 30 that has a through hole on both sides. 2
Horizontal cylinder portions 25 and 2 with holes 5a and 26a, respectively.
6 is protruded, and a female screw 23 has a male screw 35 attached thereto.
Hole 21a that accommodates the ball portion 31 of the stopper 30
and the slotted part 22 into which the connecting part 32 of the plug body 30 is fitted.
, a rocking body 20 having a weight part 27 at the rear end, a through hole 25a of the horizontal tube part 25 of the rocking body 20, a semicircular seat 15a of the protruding piece 15, a through hole 26a of the horizontal tube part 26, and the protruding piece. 1
A sealed iron lid characterized by comprising: ceramic balls 33 and 34 respectively arranged between a hemispherical seat 16a of No. 6;

(Function) For this reason, in the present invention, the notch provided on the outer periphery of the lid that also serves as the keyhole and opening hole for opening the lid is sealed with a stopper under normal conditions. Since no holes are provided on the surface of the lid, rainwater does not enter the manhole and mix with sewage, so the amount of sewage treated at the sewage treatment plant can be reduced. In addition, when opening the lid, by pressing the stopper with the tip of the opening/closing fitting, the stopper moves downward along the inner peripheral slope of the receiving frame, and then the tip of the opening/closing fitting is pressed against the back of the cover. The lid can be opened from the receiving frame by locking the lid.

(Example) An example of this invention will be described based on the drawings. First, the structure of the iron lid shown in FIG. 1 will be described. An inner sloped portion 2 is disposed on the upper part of the inner circumference of the receiving frame 1. Further, an outer periphery inclined portion 11 is disposed on the outer periphery of the lid portion 10, and this outer periphery inclined portion 11
is fitted into the inner peripheral inclined portion 2 of the receiving frame 1, and the lid portion 10 is disposed on the receiving frame 1. A notch 13 is provided on the outer edge of the lid 10, and a notch 1 is provided on the back surface of the lid 10.
Guide walls 14, 14 are disposed on both sides of the lid 10, and protruding pieces 15, 16 are provided on the back side of the lid 10 to face each other at positions inside the notch 13.
5 and 16 have semicircular seats 15a and 16a on opposite sides.
is installed. Furthermore, a seat groove 17 is provided inside the notch 13 of the lid 10 at right angles to the diameter direction.
A long hole 18 is bored in the center of this seat groove 17. A key rod 40 is inserted into the seat groove 17 and the elongated hole 18.

Next, the sealing mechanism shown in FIGS. 2 and 3 will be described. The rocking body 20 is constructed around a cylinder 21, and a slotted part 22 is arranged in the longitudinal direction on the upper surface of the cylinder 21. Further, a female thread 23 is provided on the right inner periphery of the cylinder body 21, and
On both sides of the cylindrical body 21, there are horizontal cylindrical portions 25 perpendicular to the cylindrical body 21,
26 are provided in a protruding manner, and through holes 25a and 26a are bored in the centers of the horizontal cylinder parts 25 and 26, and communicate with the hole part 21a of the cylinder body 21. A weight portion 27 is connected to the lower right end of the cylinder 21.

To assemble this rocking body 20 on the back surface of the lid 10, first insert the plug 3 into the hole 21a of the cylindrical body 21.
0 is inserted, and at this time, the connecting portion 32 between the stopper 30 and the ball portion 31 is fitted into the slotted portion 22 of the cylinder 21, and this connecting portion 32 has a rectangular cross section. Because of this, it fits into the slotted part 22 and makes it impossible to rotate the plug body 30 and the ball part 31, and the horizontal cylinder part 25,
Ceramic balls 33, 34 are inserted into the through holes 25a, 26a of 26, and the horizontal cylinder portions 25, 26 are inserted into the hemispherical seats 15a, 16a of the protrusions 15, 16 protruding from the back surface of the lid portion 10. When the male screw 35 is screwed into the female screw 23 of the cylindrical body 21 and tightened in this state, the plug 30 is located on the left side of the cylindrical body 21 and the through holes of the horizontal cylindrical parts 25 and 26 are closed. Ceramic balls 33, 34 disposed inside 25a, 26a are pushed outward, and the semicircular seats 15a,
16a, and swingably supports the rocking body 20 between the projecting pieces 15 and 16. This rocking body 20 is normally positioned approximately horizontally, and the stopper 30 is located at the notch 1 of the lid 10.
3 and is arranged in a fitted manner. A head 41 of a key rod 40 is fitted into the seat groove 17 of the lid 10, and the lower end of the key rod 40 is connected to the weight portion 2 of the rocking body 20.
7 to prevent the rocking body 20 from rocking due to vibration or internal pressure. This key stick 40
A notch 42 is provided in the middle part of the column 43,
For this purpose, by lifting the key stick 40 and rotating it when the notch 42 is located in the thick part of the lid part 10, the notch part 42 will be engaged with the thick part of the lid part 10 and stopped. I can do it.

Next, the case of opening the lid 10 from the receiving frame 1 shown in FIG. The rocking body 20 is made to be able to swing. When the stopper 30 is pressed with the tip of the opening/closing fitting 50, the stopper 30 moves downward along the inner circumferential slope 2 of the receiving frame 1, and then the opening/closing fitting 50 is rotated to move the tip 51 of the lid 10. By locking on the back surface and tilting the opening/closing fitting 50, the tip 51 presses the plug 30 against the upper part of the locking wall 3 between the back surface of the lid 10 and the plug 30.
The lid portion 10 fitted to the receiving frame 1 is pushed open.
The head 41 of the key stick 40 bored into the lid 10 can be used as a handle.

When fitting the lid part 10 to the receiving frame 1, the lid part 10 is first fitted to the receiving frame 1, and the weight part 2
7, the stopper 30 is rotated to open the notch 1 of the lid 10.
3 is sealed, and further the key stick 40 is rotated to engage and disengage the notch 42 from the lid 10, and the head 41 is buried in the long groove 17 by moving it downward, so that the rocking body 20 is free from vibrations, internal pressure, etc. can prevent it from rotating.

(Effects) As described above, this invention is based on the plug body 30 and the rocking body 2.
The ball part 31 of the stopper 30 is accommodated in the hole 21a of the rocking body 20, the connecting part 32 is fitted into the slotted part 22, and the rocking body 20 is connected to the ceramic balls 33, 34. By supporting the projecting pieces 15 and 16 through
Even when the stopper 30 rotates, the top surface of the stopper 30 always remains horizontal, allowing it to slide up and down smoothly between the inclined inner circumference of the receiving frame 1 and the inner circumferential surface of the notch 13 of the lid 10. 35 is screwed into the female thread 23 of the cylinder body 21, the ball part 31 of the stopper body 30 does not escape from the hole part 21a, and the key rod 40 is secured by the seat groove 17 and the long hole 18 provided in the lid part 10. head 41 and notch 42
The lock part 24 of the rocking body 20 can be reliably engaged with or disengaged from the locking wall 3 of the receiving frame 1 by the rotational operation of the rocking body 20, and the structure is simple and easy to assemble. It also has effects such as easy disassembly.

[Brief explanation of the drawing]

FIG. 1 is a half-sectional view of the iron lid, FIG. 2 is an exploded perspective view of the sealing mechanism, FIG. 3 is a sectional view of the sealing mechanism, and FIG. 4 is a half-sectional view of the iron lid when the lid is opened. DESCRIPTION OF SYMBOLS 1... Receiving frame, 2... Inner circumference inclined part, 10... Lid part, 11... Outer circumference inclined part, 13... Notch part, 14
... Guide wall, 15, 16 ... Projection piece, 15a, 1
6a...Semi-spherical seat, 17...Seat groove, 18...Long hole, 20...Rocking body, 21...Cylinder body, 21a...
Hole portion, 22...Slotted portion, 23...Female screw, 2
5, 26...Horizontal tube part, 27... Weight part, 30... Plug body, 31... Ball part, 32... Connection part, 33, 34
... Ceramic ball, 40 ... Key stick, 41 ...
Head, 42... Notch, 43... Pillar, 50...
Opening/closing fitting, 51... tip.

Claims (1)

[Scope of utility model registration request] An outer sloped part 1 that fits into an inner sloped part 2 of the receiving frame 1
1, a notch 13 that fits into the stopper 30, and a key stick 4.
A lid part 10 is provided with a seat groove 17 that engages the head of the key 0 and is provided inside the notch part 13 at right angles to the diametrical direction, and a long hole 18 that engages with the notch part 42 of the key stick 40;
Plug bodies 30 provided oppositely on both sides of the back surface of the lid part 10
guide walls 14, 14, and notch 13 of cover plate 10.
A protruding piece 1 is protruded from the cover plate 10 so as to face each other at an inner position thereof, and has semicircular seats 15a and 16a on opposing surfaces.
5, 16, the notch portion 13 and the inner peripheral inclined portion 2 of the receiving frame 1.
A plug body 30 is provided with a connecting part 32 that fits between the slots 22 of the cylinder body 21 and a ball part 31 that fits into the hole 21a of the cylinder body 21, and a plug body 30 that has a through hole on both sides. 2
Horizontal cylinder portions 25 and 2 with holes 5a and 26a, respectively.
6 is protruded, and a female screw 23 has a male screw 35 attached thereto.
Hole 21a that accommodates the ball portion 31 of the stopper 30
and the slotted part 22 into which the connecting part 32 of the plug body 30 is fitted.
, a rocking body 20 having a weight part 27 at the rear end, a through hole 25a of the horizontal tube part 25 of the rocking body 20, a semicircular seat 15a of the protruding piece 15, a through hole 26a of the horizontal tube part 26, and the protruding piece. 1
A sealed iron lid characterized by comprising ceramic balls 33 and 34 respectively arranged between a hemispherical seat 16a of No. 6 and a hemispherical seat 16a.