KR101650170B1 - Locking Device for Manhole Cover with Function of Anti-Corrosion - Google Patents

Abstract

The present invention relates to a fixing device for a manhole cover, and in particular, to provide a fixing device for a manhole cover such that the deterioration of the locking state of the manhole cover due to the corrosion of the coupling portion can be prevented. The fastening device for the manhole cover includes a bolt head 111, a fastening bolt 11 extending downward from the bolt head 111 and composed of a leg 112 and a packing portion 113 having a pin hole 114 formed therein; A tightening bolt 12 consisting of a tightening head 121 coupled to the lower portion of the leg 112 of the fastening bolt 11 and a tightening leg 122 extending from the tightening head 121; And a fixing nut 13 which is engaged with a tightening leg 122 of the tightening bolt 12. The tightening bolt 12 is fixed to an auxiliary device of the manhole cover and the tightening bolt 11 is fastened to the manhole cover 12. [ And is fixed to the tightening bolt 12 through a fastening hole formed in the fastening bolt 12.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a locking device for a manhole cover having a corrosion-

The present invention relates to a fixing device for a manhole cover, and in particular, to provide a fixing device for a manhole cover such that the deterioration of the locking state of the manhole cover due to the corrosion of the coupling portion can be prevented.

A manhole is a hole made to allow people to go underground on the road surface and can be made mainly for repairing or inspecting underground wiring or sewerage. A manhole cover is a cover made of a material such as cast iron or concrete formed to cover a manhole.

Since the manhole is mainly formed on the road surface and exposed to a vehicle, a moving object, or an external environment, the manhole cover is hardly held firmly in the manhole. As a result, the manhole cover is maintained in a loose state, and when it is contacted with a vehicle or a moving object, vibration may be generated, and in severe cases, it may deviate from the manhole. Therefore, various techniques have been developed to maintain the manhole cover firmly in the manhole.

Prior art related to the structure of a manhole cover is disclosed in Korean Patent Publication No. 2004-0019117 'Manhole cover with lock function and its assembly'. The prior art includes a manhole support frame, a manhole cover, and a locking device for fixing or separating the manhole cover to or from the manhole support frame. The locking device includes a locking groove continuously formed on the side of the manhole cover supporting portion, At least one locking protrusion formed at one side of a circumferential surface of the manhole cover, a slot formed at a position opposite to the locking protrusion and extending from an edge of the manhole cover to at least a handle mounting portion in an inward direction thereof, A catch which is protruded from the edge surface of the manhole cover according to the operation of the handle and inserted into the lock groove or horizontally movable so as to be embedded in the slit and the manhole cover is inserted into the through hole having vertical and inward inclination angles, A manhole cover having a locking function including a handle for horizontally moving a lock .

Another prior art related to the structure of the manhole cover is Patent Registration No. 1134112, " Manhole with Locking Function of Manhole Cap ". The prior art is characterized in that a catching protrusion is formed along the inner periphery and an annular fastening groove is formed in the inner periphery, and a fitting hole is formed in the upper face of the upper mold. An opening is formed on one side of the bottom portion, And a bottom hole formed in the lower surface of the bottom plate, the bottom hole having a manhole cover having a fixing groove facing the installation hole, and a long operation hole formed in the case and penetrating through the installation hole, An operating unit having a fastening protrusion formed at a front end of the operating body and a fastening protrusion protruding from an end of the operating body, and an operating unit that is inserted into the fastening shaft and resiliently urges the operating unit in the fastening direction An elastic spring which presses the fixing hole and a fixing ball which penetrates through the mounting hole and the fixing hole, Discloses a manhole made of tread.

The manhole cover can be made of a manhole cover and an auxiliary device, and the manhole cover and the auxiliary device can be joined by a fastening device such as a bolt. Generally, the manhole cover is exposed to an extreme external environment, so that the fastening device can be easily corroded, which may weaken the coupling between the manhole cover and the auxiliary device.

The prior art does not disclose a method that can solve such a problem that may occur in a manhole cover.

The present invention has been made to solve the problems of the prior art and has the following purpose.

Prior Art Document 1: Korean Patent Publication No. 2004-0019117 (published by NISSAN CO., LTD. On Mar. 05, 2004) Manhole cover with lock function and its assembly Prior Art 2: Korean Patent Registration No. 1134112 (Korea Foundry Co., Ltd., published on Apr. 09, 2012) Manhole A manhole with a lid lock function

SUMMARY OF THE INVENTION It is an object of the present invention to provide a manhole cover fixing device which can improve the durability of a manhole cover.

According to a preferred embodiment of the present invention, the manhole cover fixing device comprises: a bolt head; a fastening bolt extending downward from the head of the bolt and having a pin hole formed therein and a packing portion; A tightening bolt comprising a tightening head coupled to a lower portion of a leg of a fastening bolt and a tightening leg extending from the tightening head; And a fixing nut coupled to the tightening leg of the tightening bolt, wherein the tightening bolt is fixed to an auxiliary device of the manhole cover, and the tightening bolt is fixed to the tightening bolt through a fastening hole formed in the manhole cover.

According to another preferred embodiment of the present invention, the fastening bolt, fastening bolt and fastening nut are made of stainless steel.

According to another preferred embodiment of the present invention, the fastening head is formed with a rectilinear fixed rim.

The fixing device according to the present invention is advantageous in that the durability of the manhole cover is improved by having a corrosion-resistant and rigid fastening structure made of, for example, stainless steel. Further, since the fixing device according to the present invention has a simple structure and corrosion resistance, it has an advantage that it can be easily replaced due to a partial damage of the manhole cover.

1A and 1B show an embodiment of a manhole cover fixing apparatus according to the present invention.
2A and 2B illustrate an embodiment in which the fixing device according to the present invention is installed in an auxiliary device of a manhole cover.
3A and 3B show an embodiment in which the auxiliary device is fixed to the manhole cover.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto. In the following description, components having the same reference numerals in different drawings have similar functions, so that they will not be described repeatedly unless necessary for an understanding of the invention, and the known components will be briefly described or omitted. However, It should not be understood as being excluded from the embodiment of Fig.

1A and 1B show an embodiment of a manhole cover fixing device 10 according to the present invention.

1A and 1B, a manhole cover fixing apparatus 10 according to the present invention includes a bolt head 111, a leg 112 extending downward from the bolt head 111 and formed with a pin hole 114, A fastening bolt 11 made of a packing part 113; A tightening bolt 12 consisting of a tightening head 121 coupled to the lower portion of the leg 112 of the fastening bolt 11 and a tightening leg 122 extending from the tightening head 121; And a fixing nut 13 which is engaged with a tightening leg 122 of the tightening bolt 12. The tightening bolt 12 is fixed to an auxiliary device of the manhole cover and the tightening bolt 11 is fastened to the manhole cover 12. [ The fastening bolt 12 can be fastened through the fastening holes formed in the fastening bolt 12.

The fastening device 10 according to the present invention can be used for securing an auxiliary device coupled to a manhole cover. The manhole cover can be composed of a manhole cover and an auxiliary device coupled to the bottom of the manhole cover, and the auxiliary device can be engaged and fixed with bolts and nuts using a fixing hole formed in the central portion of the manhole cover. The fixing device 10 according to the present invention is for fixing the auxiliary device to the manhole cover, and the auxiliary device can have any structure.

The fastening device 10 according to the present invention can be made entirely of stainless steel material, thereby improving the corrosion resistance. Specifically, the fixing device 10 according to the present invention can be made of a stainless steel material containing 10 to 30 wt% of chromium and 1 to 8 wt% of nickel. And preferably made of austenitic or ferritic stainless steel, or in a ratio of austenitic: ferritic = 100: 20 to 50 in weight ratio.

The manhole cover can be damaged mainly by corrosion, and is particularly prone to damage due to corrosion of the bolt or nut. According to the present invention, in order to prevent such a manhole cover from being corroded, the fixing device can be made of a stainless steel material. Making the fastening device of stainless steel material has the advantage that it improves the corrosion resistance and at the same time prevents the loss of the fastening function due to the prevention of some breakage of the fastening device.

The bolt head 111 can be made to have a polygonal cross section, for example, a hexagonal cross section. And a leg 112 having threads formed under the bolt head 111 can be extended. The legs 112 may extend to a certain length and a pin hole 114 may be formed in the upper portion. A pin or the like is inserted into the pin hole 114 so that the fixing device 10 itself can be fixed at a predetermined position so that the fastening of the fixing device 10 is prevented from being loosened by an external impact such as vibration do. A packing portion 113 may be formed between the bolt head 111 and the leg 112. [ The packing portion 113 may be made of, for example, a stretchable material such as silicone or rubber inserted between two discs and two discs, and one disc disposed below may be arranged to be movable up and down.

The tightening bolt 12 may have a tightening head 121 having a polygonal cross section and a tightening leg 122 extending downward from the tightening head 121 with a function of fixing the auxiliary device to the leg 112, . The fastening leg 122 may be hollow cylindrical and may be threaded on the internal surface to engage threads formed on the circumferential surface of the leg 112. On the other hand, a thread is formed along the outer circumferential surface at the lower portion of the tightening leg 122, so that the fixing nut 13 can be engaged. By the engagement of the fixing nut 13, the auxiliary device can be completely fixed to the manhole cover.

The structure for coupling to the manhole cover in the fixing device 10 according to the present invention will be described below.

2A and 2B show an embodiment in which the fixing device according to the present invention is installed in the auxiliary device 20 of the manhole cover.

FIG. 2A shows a shape of the fixing device fastened to the assisting device 20 from the outside, and FIG. 2B shows a shape of the fastening device fastened to the assisting device 20 when viewed from the bottom of the manhole cover.

Referring to FIG. 2A, the assistance device 20 can be composed of a planar support member 21 forming a polygonal shape and a straight support member 22 extending in the circumferential direction from the center across the planar support member 21. A fastening portion 23 having a fastening hole may be formed in a central portion of the assisting device 20 and a fastening bolt 12 may be fastened to the fastening hole. 2A, the tightening bolt 12 can be fixed in the form of being inserted into the fastening hole from the upper side of the assisting device 20, and is fastened to the fastening head of the fastening bolt 12 A fixed rim 24 corresponding to the side can be formed. The rim of the fastening head may be round in shape to correspond to the shape of the fastening hole as a whole, and the fastening rim 24 may be a straight line connecting two points around the circle. The fastening bolt (12) is prevented from rotating by the fastening rim (24). The fixed rim 24 can be made in various shapes and the invention is not limited to the embodiments shown.

Referring to FIG. 2B, a fixing nut 13 may be coupled to the lower portion of the tightening bolt 12. The auxiliary device can be fixed to the manhole cover by the fixing nut 13 being attached to the lower side of the tightening bolt 12. Specifically, the tightening bolt 12 can be inserted into the fastening hole of the assisting device 20 and fixed to the assisting device 20 by the fastening nut 13. The auxiliary device 20 can be fixed to the manhole cover by inserting the fastening bolts into the inner surface of the fastening bolt 12 from the upper side of the manhole cover and engaging them.

An embodiment of such a manhole structure will be described below.

FIGS. 3A and 3B show an embodiment in which the auxiliary device is fixed to the manhole cover 31. FIG.

Referring to FIG. 3A, the manhole cover 31 may have a disk shape, and a joining rim 32 may be formed on an inner surface thereof along a rim. The auxiliary device may consist of a planar support member (21), a straight support member (22) and a fastening portion (23). As described above, the ancillary apparatus can be fixed to the manhole cover 31 by fastening the fastening device to the fastening hole 231 formed in the fastening portion 23. In addition, the auxiliary device can be fixed to the manhole cover 31 by the fastening bracket 33.

3B, the fastening bracket 33 includes a fastening body 331 having a bottom surface, both side surfaces and a rear surface, the front surface of which is opened to form an inlet; Side wings (332a, 332b) extending from both sides of the fastening body (331); And fixing surfaces 333a and 333b formed on the rear surfaces of the respective side wings 332a and 332b. And one side blade 332b may have an extending surface extending in the direction of the fastening body 331. [ At least one fixing hole P21 and P22 may be formed on the fixing surfaces 333a and 333b and one fixing hole P11 may be formed on the bottom surface of the coupling body 331 and the extending surface of one side blade 332b, , P12) may be formed.

3B, one end of the linear support member 22 is received in the space formed by the extending surface of one side blade 332b and the fastening body 331, and the fastening holes P21 and P22 are formed. As shown in Fig. The fixing brackets 33 are fixed to the manhole cover by the fixing of the anchoring nails An such as anchor nails An to the fixing holes P21 and P22 formed on the fixing surfaces 333a and 333b, The auxiliary device can be fixed to the manhole cover.

The fixing pin or anchor nail An may be made of stainless steel and made of the same or similar material as, for example, the above-described stainless steel.

As described above, by securing the auxiliary device to the manhole cover by means of a fixing device made of stainless steel material, a fixing pin, or an anchor nail (An), the coupling state of the auxiliary device exposed to the external extreme environment is maintained over a long period of time . The external extreme environment may include a salt component in particular, and the fixing device according to the present invention can stably maintain the state of the manhole cover and the auxiliary device for a long period of time owing to the corrosion resistance to the salt component, It is advantageous in that it is improved.

The fixing device according to the present invention is advantageous in that the durability of the manhole cover is improved by having a corrosion-resistant and rigid fastening structure made of, for example, stainless steel. Further, since the fixing device according to the present invention has a simple structure and corrosion resistance, it has an advantage that it can be easily replaced due to a partial damage of the manhole cover.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention . The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

10: fastening device 11: fastening bolt
12: fastening bolt 13: fastening nut
111: Bolt head 112: Leg
113: packing part 114: pin hole
121: Fastening head 122: Fastening leg
20: auxiliary device 21: flat support member
22: linear support member 24: fixed rim
23: fastening portion
31: Manhole cover 32: Coupling rim
33: fastening bracket
331: fastening bodies 332a, 332b: side wing
333a, 333b:

Claims (3)

A bolt head 111, a fastening bolt 11 extending downward from the bolt head 111 and consisting of a leg 112 and a packing portion 113 formed with a pin hole 114;
A tightening head 121 coupled to the lower portion of the leg 112 of the fastening bolt 11 and a tightening bolt 122 extending from the tightening head 121 and having a fastening leg 122 having a hollow cylindrical shape and a thread formed on the inner surface thereof 12); And
And a fixing nut (13) coupled to the tightening leg (122) of the tightening bolt (12)
The fastening bolt 12 is fixed to an auxiliary device of the manhole cover and the fastening bolt 11 is fixed to the tightening bolt 12 through a fastening hole formed in the manhole cover,
The fastening head 121 is formed with a rectilinear fixed frame 24 connecting two points around the circle and has a shape corresponding to the shape of the fastening head 121 formed with the rectilinear fixed frame 24 Wherein the fastening head (121) of the fastening bolt (12) is inserted into the fastening hole of the fastening bolt (12).   The manhole cover fixing device according to claim 1, wherein the fastening bolt (11), the fastening bolt (12), and the fastening nut (13) are made of stainless steel. delete

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