KR101723428B1 - Coupling device of manhole covers - Google Patents

Abstract

The present invention relates to a coupling device for a manhole cover, and more particularly, to a coupling device for a manhole cover so that the manhole cover can be easily separated from and separated from the manhole holder, The present invention relates to a coupling device for a manhole cover.
The present invention relates to a manhole cover provided on a manhole, and a manhole cover seated on an annular mounting jaw of the manhole cover, comprising: A groove formed in the upper protruding jaw surface of the insertion port and having a through hole formed therein; An axial groove formed in a bottom surface of the insertion port; A rotation shaft which is inserted into the through hole of the groove and which is supported by the shaft groove and is formed on the upper side so as to be rotatable, A fixing pin mounted on a central portion of the rotary shaft and fixed by upper and lower snap rings; And an insertion groove formed along the outer circumferential surface of the manhole cover so as to fix the manhole cover to the manhole pedestal by inserting the fixing pin fixed to the rotation shaft into the manhole cover while rotating.

Description

{Coupling device of manhole covers}

The present invention relates to a coupling device for a manhole cover, and more particularly, to a coupling device for a manhole cover so that the manhole cover can be easily separated from and separated from the manhole holder, The present invention relates to a coupling device for a manhole cover.

Generally, a manhole is formed on the road for inspecting or managing facilities such as a statue, a sewer pipe, a city gas pipe, a communication facility, and an electric facility buried in the underground. In the upper part of such a manhole, A manhole cover is provided as an opening and closing means from the ground so that an operator can enter and exit the manhole.

However, according to the conventional manhole cover used for this purpose, as shown in FIG. 1, the holding force of the holding jaw 101 of the manhole body 100 supporting the manhole cover 110 is weak, The load and the shock of the passing vehicle can not be supported and the manhole cover 110 is detached from the main body 100 due to the vibration caused by the surrounding construction.

As such, the manhole cover 110 protruding upward from the manhole body 100 has a risk of a safety accident such as causing a large accident by acting as a risk factor to the vehicle under running.

In addition, when the manhole cover 110 is detached or damaged as described above, it is impossible to safely protect the facilities installed in the manhole body 100, as well as the management of the manhole body 100 there was.

In addition, in order to open the manhole cover from the manhole pedestal, there is a need to provide a jig suitable for the locking device.

In addition, the conventional locking devices have a problem in that foreign substances are stuck on the operation part due to the operation parts for the operation being exposed to the outside, so that the jigs are difficult to be coupled and normal operation can not be performed due to foreign substances.

Japanese Patent Laid-Open Publication No. 2003-0075473 discloses a hinge unit which has a hinge unit coupled to a manhole support for opening and closing a manhole cover. The hinge unit is provided with a catch on the side of the lid facing the hinge and an elastic part for elastically projecting the catch So that the pawl rides over the inner end of the seating jaw of the manhole pedestal when the manhole cover is opened and closed.

However, since the locking device is designed to be locked by being hooked under the seating jaw, the elastic portion and the locking piece are always protruded to the lower portion of the manhole cover. As a result, during the transportation and installation of the manhole cover, a phenomenon of being damaged due to external impact is generated. In other words, when the manhole cover is heavy or heavy, it causes the manhole cover to be thrown or dropped from the cargo hold when the carriers or constructors load or unload the car in the cargo hold. In addition, when the manhole cover is rolled, So that it is easily broken or damaged. That is, since the elastic claw is an elastic body, it is vulnerable to an instantaneous impact, so that it is easily broken or damaged.

In addition, the elastic portion for elastically projecting the pawl secures an appropriate length for securing the elastic force. When the opening and closing operation of the manhole cover is performed, the elastic pawl receives resistance in the opening / closing direction reverse direction when the elastic pawl rides over the inner end of the manhole The elastic part having the length is bent to the upper part or the lower part, and if this operation is performed suddenly or repeatedly, the elastic part is broken and the cutting is occurred.

In order to overcome the disadvantages mentioned above, the locking device requires a hinge device so that it can always be opened and closed in a constant orbit. Therefore, there is a disadvantage that it is difficult to adopt a general manhole having no hinge.

On the other hand, there is a general structure in which the manhole cover is seated on the seating jaw of the manhole pedestal, while a tapered manhole in which the inner circumferential surface of the manhole support and the outer circumferential surface of the manhole cover are inclined to maintain the closed state by the inclination angle 0654419).

Such a tapered manhole has an advantage that when the manhole cover is closed, the manhole cover is coupled to the manhole cover in a wedge-shaped manner by the inclination angle of the manhole cover, so that the tapered manhole is watertightly coupled. However, when the inclination angles of the manhole pedestal and the manhole cover are large, the manhole is opened abnormally and safety accidents may occur. When the inclination angle is small, it is difficult to open the manhole cover. In particular, when a heavy load such as a vehicle is applied for a long period of time, when the manhole cover is opened, even if the heavy equipment such as an excavator is lifted and lifted, the manhole cover is not easily opened, There was a problem in opening.

In order to prevent such a phenomenon, a groove for reducing the contact area around the manhole cover is formed, and a separate opening groove is formed on the side of the manhole cover so that an extension, such as a lever, However, this has a drawback in that it is necessary to form a separate opening portion for opening the manhole pedestal at all times.

Patent Document 0001: (KR) Patent Publication No. 10-2003-0075473 Patent Document 0002: (KR) Patent Registration No. 10-0654419

The present invention has been developed in order to solve the above problems, and it is an object of the present invention to provide a manhole cover for a vehicle, which can easily prevent a manhole cover from being detached from a manhole pedestal while a vehicle is moving, It is intended that the inside of the manhole can be checked and repaired by easily separating from the pedestal.

Another object of the present invention is to prevent the manhole cover from being separated from the manhole pedestal by preventing the manhole cover from rotating while generating a flow in the manhole pedestal by moving the vehicle after the manhole cover is attached to the manhole pedestal .

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

The apparatus for coupling a manhole cover formed on a manhole according to the present invention comprises a manhole cover installed on a manhole and a manhole cover seated on an annular mounting jaw of the manhole cover, A groove formed in the upper protruding jaw surface of the insertion port and having a through hole formed therein; An axial groove formed in a bottom surface of the insertion port; A rotation shaft inserted into the through hole of the groove to be supported by the shaft groove and having a locking protrusion formed on the upper side so as to be seated in the groove; A fixing pin mounted on a central portion of the rotary shaft and fixed by upper and lower snap rings; And an insertion groove formed along an outer circumferential surface of the manhole cover so as to fix the manhole cover to the manhole cover while rotating the fixing pin fixed to the rotary shaft, And a rotary shaft is fixed to the groove so as to prevent rotation by inserting the anti-rotation hole of the ring.

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According to the present invention having the above features, the fixing pin, which is engaged with the rotation shaft mounted inside the insertion hole formed at the four sides of the manhole support, is inserted into the insertion groove formed along the outer circumferential surface of the manhole cover to fix the manhole cover, It is possible to prevent the manhole cover from being detached and separated from the manhole cover by the movement of the manhole cover or the pressure of the wastewater flowing back into the inside of the manhole.

In addition, according to the present invention, since the manhole cover is coupled to each other by the teeth at four sides of the manhole pedestal, the manhole cover can be prevented from rotating even if the manhole cover is moved by the movement of the vehicle, thereby completely preventing the manhole cover from being separated from the manhole pedestal .

1 is a cross-sectional view showing a state of a conventional manhole cover and a manhole cover engaged with each other.
2 is a plan view showing a state where a manhole cover is coupled to a manhole pedestal according to the present invention.
3 is a perspective view showing a state in which the manhole cover and the manhole cover are separated from each other according to the present invention.
4 is a cross-sectional view illustrating a fixing pin coupled to a rotation shaft installed in an insertion port of a manhole pedestal according to the present invention.
5 is a perspective view illustrating a state in which the rotation shaft according to the present invention is fixed by a snap ring.
6 is a plan view showing another state of a manhole cover and a manhole cover according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The construction of a coupling device for a manhole cover according to the present invention will now be described with reference to FIGS. 2 to 6. FIG.

2, the manhole 1 comprises a manhole pedestal 10 and a manhole cover 20. As shown in FIG.

The manhole pedestal 10 is formed by extending an annular seating step 11 protruding from the inner circumferential surface of the manhole cover 10 so as to seat the manhole cover 20 thereon.

In addition, an insertion port 12 is formed on the four sides of the manhole holder 10, and the rotation shaft 30 is mounted on the insertion port 12 so as to be rotatable. At this time, the insertion port 12 is formed to maintain a space such that interference does not occur during rotation of the rotation shaft 30 and the fixing pin 30 fixed to the rotation shaft 30.

A concave groove 15 is formed in the surface of the upper protruding protrusion 13 of the insertion port 12 formed at four sides of the manhole cover 10 and a through hole 14 is formed in the concave groove 15.

In addition, an axial groove 16 is formed in the bottom surface of the insertion port 12 in a concave manner.

A locking protrusion 31 formed on the upper side is seated on the groove 15 so as to be inserted into the through hole 14 formed in the groove 15 and supported and rotated by the shaft groove 16, The lower end side of the rotary shaft 30 connected to the lower shaft 31 is inserted and supported in the shaft groove 16.

An insertion hole 50a is formed at one side of the rotary shaft 30 so as to be inserted into the center of the rotary shaft 30. A fixing pin 50 is fixed to the rotary shaft 30 to fix the insertion pin 50a, A snap ring 40 (41) is mounted on the upper side and the lower side.

The snap rings 40 and 41 are inserted into the snap ring insertion grooves 32 and 33 formed in the rotary shaft 30 and fixed.

Therefore, the fixing pin 50 mounted on the rotary shaft 30 is held by the retaining rings 40 and 41 and thus is not moved.

3, the fixing pin 50 fixed to the rotary shaft 30 is concaved along the outer circumferential surface of the manhole cover 20 so as to be inserted while rotating at the same time by the rotation of the engaging jaw 31 An insertion groove 21 is formed.

The manhole cover 20 is coupled to the manhole pedestal 10 by inserting the fixing pin 50 attached to the rotation shaft 30 of the manhole cover 10 into the insertion groove 21 of the manhole cover 20 It is not separated.

3 and 4, the fixing pin 50 coupled to the rotary shaft 30 is moved by the rotation of the latching jaw 31 and is separated from the insertion groove 21 of the manhole cover 20 The rotation preventing ring 70 is inserted into the outer circumferential surface of the latching jaw 31 and is fixed to the groove 15 in order to maintain the locked state. At this time, on the inner circumferential surface of the anti-rotation ring 70, the same anti-rotation hole 70a as the outer peripheral surface of the engaging step 31 formed in a square shape is formed.

The rotation preventing ring 70 inserted in the outer peripheral surface of the locking jaw 31 is fixed so as not to be rotated so that the fixing pin 50 mounted on the rotary shaft 30 connected to the locking jaw 31 is also fixed will be.

5, in order to fix the fixing pin 50 mounted on the rotary shaft 30, the upper and lower snap ring insertion grooves 32 and 33 of the rotary shaft 30 to which the fixing pin 50 is mounted, The fixing pin 50 is fixed without being moved up and down on the rotary shaft 30 when the snap rings 40 and 41 are mounted on the rotary shaft 30, respectively.

6, teeth 60 and 61 are formed on both sides of the manhole pedestal 10 and the manhole cover 20, respectively, and the manhole pedestal 10, The manhole cover 20 is engaged with the teeth 60 of the manhole cover 20 so that the manhole cover 20 can not rotate from the manhole pedestal 10.

The operating state of the coupling device of the manhole cover according to the present invention constructed as described above will be described in detail with reference to the drawings.

First, a rotary shaft 30 equipped with a fixing pin 50 for fixing and fixing the manhole cover 20 is mounted on the four sides of the manhole holder 10. That is, after inserting the rotary shaft 30 into the through hole 14 formed in the groove 15 of the upper protruding protrusion 13 of the insertion hole 12 formed in the four sides of the manhole holder 10, The retaining pin 50 is inserted into the rotary shaft 30 before the retaining pin 50 is inserted into the shaft groove 16 and then the retaining pins 40 and 41 are mounted on the upper and lower sides of the retaining pin 50, And fixed to the insertion grooves 32 (33).

Therefore, the fixing pin 50 is fixed by the snap rings 40 and 41 without being moved upward or downward.

When the rotary shaft 30 is inserted into and supported by the shaft groove 16, the outer circumferential surface is formed in a square shape so that the engagement protrusion 31 connected to the rotary shaft 30 is seated and supported in the groove 15.

In order to prevent the fixing pin 50 from rotating, the rotation preventing ring 70, which is formed in the outer peripheral surface of the engaging protrusion 31 formed in a square shape, And inserted into the outer circumferential surface of the groove 31 to be fixed to the groove 15.

At this time, the fixing pin 50 is inserted into the insertion port 12. In addition, an insertion groove 21 is formed on the outer circumferential surface of the manhole cover 20 so that the fixing pin 50 can be inserted along the outer circumferential surface.

When the manhole pedestal 10 and the manhole cover 20 formed as described above are moved to the site and installed, the manhole pedestal 10 is installed on the manhole 1 and then the annular mounting chin 11 of the manhole pedestal 10 is installed. The manhole cover 20 is seated and fixed.

After detaching the rotation preventing ring 70 inserted into the outer circumferential surface of the stopping jaw 31 and then seated in the groove 15 of the protruding jaw 13 formed at the four sides of the manhole holder 10, The fixing pin 50 fixed to the rotation shaft 30 connected to the locking jaw 31 by the retaining ring 40 and 41 and inserted into the insertion port 12 is rotated by the rotation of the fixing pin 50, The manhole cover 20 is fixed to the manhole pedestal 10 while being inserted into the insertion groove 21 formed along the outer circumferential surface of the manhole cover 20 by being rotated by the insertion port 12.

When the rotation preventing hole 70a of the rotation preventing ring 70 separated from the outer circumferential surface of the locking jaw 31 is inserted again and is fixed to the groove 15 to be fixed, The stopping jaw 31 is not rotated by the prevention hole 70a. That is, the outer circumferential surface of the engagement protrusion 31 formed in a rectangular shape is tightly coupled to the rotation preventing hole 70a having a square shape on the inner circumferential surface of the rotation preventing ring 70, so that rotation is prevented.

6, the manhole pedestal 10 and the manhole cover 20 can be engaged with each other by meshing the teeth 60 and 61 formed on opposite sides of the manhole cover 20 or facing each other, as shown in FIG. 6 The manhole cover 20 is not completely separated from the manhole pedestal 10 because the manhole cover 20 is not engaged because the teeth 60 and 61 are fixed to each other in the manhole holder 10 The fixing pin 50 fixed to the rotation shaft 30 mounted on the insertion port 12 of the manhole holder 10 is inserted into the insertion groove 21 of the manhole cover 20 and is inserted into the manhole cover 20, The manhole cover 20 is fixed to the manhole pedestal 10 without being detached or detached therefrom.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. In addition, it is a matter of course that various modifications and variations are possible without departing from the scope of the technical idea of the present invention by anyone having ordinary skill in the art.

10: Manhole stand 11: Annular seating chin
12: insertion hole 13: protruding jaw
14: through hole 15: groove
16: Shaft 20: Manhole cover
21: insertion groove 30:
31: Jaws 32, 33: Snap ring insertion groove
40, 41: snap ring 50:
50a: insertion hole 60,61: tooth
70: Anti-rotation ring 70a: Anti-rotation ball

Claims (4)

A manhole cover (10) mounted on a manhole and a manhole cover (20) seated on an annular mount (11) of the manhole pedestal (10)
An insertion port 12 formed to face the four sides of the manhole pedestal 10;
A groove 15 in which a through hole 14 is formed in the surface of the upper protruding jaw 13 of the insertion port 12;
An axial groove (16) formed on the bottom surface of the insertion port (12);
A rotation shaft 30 rotatably inserted into the through hole 14 of the groove 15 and the shaft groove 16 and supported by the groove 15 and formed with a latching protrusion 31 on the upper side so as to be seated in the groove 15;
And is inserted into the center of the rotary shaft 30 with the insertion hole 50a formed at one side thereof and fixed horizontally at the same height as the insertion groove 21 of the manhole cover 20 by the snap rings 40, (50);
And an insertion groove 21 formed on the outer circumferential surface of the manhole cover 20 so that the fixing pin 50 fixed to the rotation shaft 30 rotates and fix the manhole cover 20 to the manhole pedestal 10 And,
The rotation preventing hole 70a of the rotation preventing ring 70 is inserted into the outer circumferential surface of the angled locking tab 31 which is seated in the groove 15 so that the rotation shaft 30 is fixed to the groove 15 Wherein the manhole cover has a plurality of holes. delete delete The method according to claim 1,
Wherein the manhole cover (10) and the manhole cover (20) are formed with teeth (60) and (61) so as to be engaged with each other to prevent the manhole cover (20) from rotating.

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