JPH0333792Y2 - - 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 such as sewers, a crowbar hole into which the tip of a ball 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, the pivot pin 5
1, 51, since the burl pressure receiving surface 52 and the engaging portion 55 are integrally molded, a fairly wide gap is required between the burl hole 5 of the lid body 1 and the burl pressure receiving surface 52, and the lid body 1 The rainwater that falls on the manhole flows down into the manhole through the crowbar hole, and the manhole has the disadvantage that it does not form a sealed 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.

(Means for solving the problem) Outer periphery inclined part 1 that fits into inner periphery inclined part 2 of receiving frame 1
1, and a locking portion 1 that engages with the outer peripheral locking wall 3 of the receiving frame 1.
2, a notch 13 that fits into the stopper 30, and a key stick 4.
A lid part 10 that 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.
and a guide wall 14 of the stopper 30, which is provided opposite to each other on both sides of the back surface of the lid part 10 at a position opposite to the locking part 12.
14, and a hemispherical seat 15a, which is protruded from the cover plate 10 so as to face each other at a position inside the notch 13 of the cover plate 10, and is provided on the opposing surface.
16a, and a connecting portion 3 that fits between the cutout portion 13 and the inner peripheral inclined portion 2 of the receiving frame 1 and engages with the slotted portion 22 of the cylinder body 21.
2 and a ball portion 31 that fits into the hole 21a of the cylinder body 21.
The spherical part of the plug body 30 has horizontal cylinder parts 25 and 26 with through holes 25a and 26a on both sides, respectively, and a female thread 23 to which a male thread 35 is screwed. A slotted part 22 in which a connecting part 32 of a stopper 30 is fitted into a hole 21a containing a 31, a lock part 24 that engages with the locking wall 3 of the receiving frame 1 at the front end, and a weight part 27 at the rear end. A rocking body 20 provided with
Ceramic balls 33 and 34 are respectively disposed between the hemispherical seat 15a of No. 5, the through hole 26a of the horizontal tube portion 26, and the hemispherical seat 16a of the protruding piece 16. shaped iron lid.

(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 locking portion disposed at the tip of the oscillating body is released from the locking wall of the receiving frame.
Then, the tip of the opening/closing fitting is engaged with the back surface of the lid part, and the lid can be opened from the receiving frame.

(Example) An example of this invention will be described based on the drawings. First, to describe the structure of the iron lid shown in FIG. is installed. Further, an outer periphery inclined portion 11 is provided on the outer periphery of the lid portion 10, and this outer periphery inclined portion 1
1 is fitted into the inner circumferential inclined portion 2 of the receiving frame 1, and the lid portion 10 is disposed on the receiving frame 1. A locking portion 12 is vertically disposed at the bottom of the outer edge of the lid portion 10, and this locking portion 1
The lower end of the receiving frame 2 is engaged with the locking wall 3 of the receiving frame 1. Further, a notch 13 is provided on the outer edge of the lid 10 at a position opposite to the locking portion 12, and guide walls 14, 14 are provided on both sides of the notch 13 on the back surface of the lid 10.
Further, protrusions 15 and 16 are provided on the back surface of the lid part 10 and protrude from each other at positions inside the notch 13, and these protrusions 15 and 16 have semicircular spherical seats on their opposing surfaces. 15a and 16a are provided. Also, the lid part 10
A seat groove 1 is provided inside the notch 13 at right angles to the diameter direction.
7 is arranged, and a long hole 18 is provided in the center of this seat groove 17.
is drilled. 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 arranged on the right inner circumference of the cylinder 21, a lock part 24 is connected to the left end of the cylinder 21, and a lock part 24 is provided on both sides of the cylinder 21 at right angles to the cylinder 21. horizontal cylinder part 25,2 in the direction
6 is provided protrudingly, and through holes 25a, 26a are bored in the centers of the horizontal cylinder parts 25, 26, and the holes 2 of the cylinder body 21 are provided with through holes 25a, 26a.
It communicates with 1a. A weight portion 27 is connected to the lower right end of the cylinder 21. This rocking body 20
To assemble on the back side of the lid part 10, first insert the ball part 31 of the stopper 30 into the hole 21a of the cylinder body 21, and at this time insert the stopper 3 into the slotted part 22 of the cylinder body 21.
0 and the ball portion 31 are fitted together, and since this connection portion 32 has a rectangular cross section, it fits into the slotted portion 22 and prevents the stopper 30 and the ball portion 31 from rotating. , and the through holes 25 of the horizontal cylinder parts 25 and 26
Ceramic balls 33, 34 are inserted into a, 26a, and the horizontal cylinder portions 25, 26 are attached to the semicircular spherical seats 15a, 1 of the projections 15, 16 protruding from the back surface of the lid portion 10.
6a, and in this state, when the male thread 35 is screwed into the female thread 23 of the cylinder body 21 and tightened, the plug body 30 is located on the left side of the cylinder body 21, and the horizontal cylinder part 25,
The ceramic balls 33, 34 disposed in the through holes 25a, 26a of 26 are pushed outward and fit into the semicircular seats 15a, 16a of the projections 15, 16,
The rocking body 20 is swingably supported between the projecting pieces 15 and 16. This rocking body 20 is normally positioned substantially horizontally, the plug body 30 fits into the notch 13 of the lid part 10, and the lock part 24 is locked to the locking wall 3 of the receiving frame 1. 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 located above the weight portion 27 of the rocking body 20. Prevents it from swinging due to vibration or internal pressure.
This key stick 40 has a notch 42 in the middle part of the pillar part 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, this notch part 42 is locked to the thick part of the lid part 10. can be stopped.

Next, the case of opening the lid 10 from the receiving frame 1 shown in FIG. The swinging body 20 is made to be able to swing. Then, 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 the stopper 30
As a result of this movement, the lock portion 24 is disengaged from the locking wall 3 of the receiving frame 1. Then, the opening/closing fitting 50 is rotated to lock the tip 51 to the back surface of the lid 10, and the lid 10 is opened from the receiving frame 1.

When fitting the lid part 10 to the receiving frame 1, the locking part 12 of the lid part 10 is first engaged with the locking wall 3 of the receiving frame 1, and then, while pressing the plug body 30, the rocking body 20 When the portion of the lid 10 provided with is fitted into the receiving frame 1 and the pressure on the plug 30 is removed, the plug 30 is rotated by the weight 27 to seal the notch 13 of the lid 10, and at the same time The lock part 24 is rotated and locked to the locking wall 3 of the receiving frame 1, and the lid part 10 is fitted and disposed on the receiving frame 1, and the key rod 40 is further rotated to lock the notch part 42 into the lid part. By engaging and disengaging from 10 and moving it downward to embed the head 41 in the seat groove 17, it is possible to prevent the rocking body 20 from rotating due to vibrations, internal pressure, or the like.

(Effects) As described above, this invention is based on the plug body 30 and the rocking body 2.
The ball part 31 of the plug body 30 is accommodated in the hole 21a of the rocking body 20, and 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 protrusions 15 and 16 through the cap, the top surface of the stopper 30 always remains horizontal even when the swinging body 20 rotates about the horizontal cylinder parts 25 and 26 via the ceramic balls 33 and 34. The plug is made to slide smoothly up and down between the inclined inner circumferential portion of the receiving frame 1 and the inner circumferential surface of the cutout portion 13 of the lid portion 10, and the male thread 35 is screwed into the female thread 23 of the cylinder body 21. The ball portion 31 of the body 30 does not escape from the hole portion 21a, and the head portion 41 and the notch portion 42 of the key stick 40 are engaged and disengaged from each other by the seat groove 17 and the elongated hole 18 provided in the lid portion 10, and the swinging body The lock portion 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. wall 3
By forming the lock portion 24 that engages with the
While the lid is closed, the receiving frame 1 may vibrate and the lid portion 10 may swing, but the stopper 30 may move in conjunction with the action of the key rod 40.
The plug does not lift up, the surface of the stopper does not protrude from the upper surface of the lid 10, and the structure is simple and easy to assemble and disassemble.

[Brief explanation of the drawing]

Fig. 1 is a 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 sectional view of the iron lid when the lid is opened. DESCRIPTION OF SYMBOLS 1... Receiving frame, 2... Inner circumference inclined part, 3... Locking wall, 10... Lid part, 11... Outer circumference inclined part, 12...
...Locking part, 13...Notch part, 14...Guide wall,
15, 16... Projection piece, 15a, 16a... Semicircular seat, 17... Seat groove, 18... Elongated hole, 20... Rocking body, 21... Cylindrical body, 21a... Hole, 22... ...Slotted part, 23...Female thread, 24...Lock part, 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)

[Claims for Utility Model Registration] Outer inclined portion 1 that fits into inner inclined portion 2 of receiving frame 1
1, and a locking portion 1 that engages with the outer peripheral locking wall 3 of the receiving frame 1.
2, a notch 13 that fits into the stopper 30, and a key stick 4.
A lid part 10 that 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.
and a guide wall 14 of the stopper 30, which is provided opposite to each other on both sides of the back surface of the lid part 10 at a position opposite to the locking part 12.
14, and a hemispherical seat 15a, which is protruded from the cover plate 10 so as to face each other at a position inside the notch 13 of the cover plate 10, and is provided on the opposing surface.
16a, and a connecting portion 3 that fits between the cutout portion 13 and the inner peripheral inclined portion 2 of the receiving frame 1 and engages with the slotted portion 22 of the cylinder body 21.
2 and a ball portion 31 that fits into the hole 21a of the cylinder body 21.
A spherical part of the plug body 30 is provided with horizontal cylinder parts 25 and 26 having through holes 25a and 26a on both sides thereof, and a female thread 23 with a male thread 35 screwed thereon. A slotted part 22 in which a connecting part 32 of a stopper 30 is fitted into a hole 21a containing a 31, a lock part 24 that engages with the locking wall 3 of the receiving frame 1 at the front end, and a weight part 27 at the rear end. A rocking body 20 provided with
Ceramic balls 33 and 34 are respectively disposed between the hemispherical seat 15a of No. 5, the through hole 26a of the horizontal tube portion 26, and the hemispherical seat 16a of the protruding piece 16. shaped iron lid.