KR101672828B1 - Locking monhole cover of one bolt hinge type - Google Patents

Abstract

The present invention relates to a one-bolt hinge type locking manhole cover, preventing water from being leaked between fixing means fixating the cover to prevent the fixing means from being worn out. A fastening shaft and a bolt pipe body are integrally configured to be easily manufactured, and a lubricant storage space is provided to a lower portion of a nut pipe unit formed in a center portion of a nut plate to enable a lubricant to be filled therein to supply the lubricant to the bolt pipe body to enable the bolt pipe body to be smoothly fastened and unfastened.

Description

{Locking monohole cover of one bolt hinge type}

The present invention relates to a one-bolt hinge-type lock-manhole cover, and more particularly to a one-bolt hinge-type lock-manhole cover which prevents water from leaking between fixing means for fixing a lid, .

Further, according to the present invention, the tightening shaft and the bolt tube are integrally formed to facilitate manufacture, and a lubricant storage space is provided at a lower portion of the nut tube portion formed at the center of the nut plate to lubricate the bolt tube To provide a bolt hinge-type lock manhole cover capable of smoothly tightening and loosening a bolt tube.

Typically, a manhole is installed at predetermined intervals to install a power line and a communication line in the ground or to maintain an underground channel, and an entrance is formed for facilitating access to the inside and a lid is installed at an entrance.

That is, a normal manhole is provided with a manhole pedestal at an entrance of the upper part and a lid for blocking a hole at the center of the manhole pedestal.

If the lid is not firmly fixed to the manhole base, the lid must be firmly fixed to the manhole pedestal because the lid rattles during the passage of the vehicle through the manhole, or the lid detaches from the manhole pedestal.

However, since the lid is required to be able to open and close the door by separating it from the manhole pedestal, the lid provided to be openable and closable is not fixed to the manhole pedestal, There is a shaking problem in.

In order to solve this problem, a variety of techniques have been developed to enable a lid to be opened and closed but to be more firmly fixed to a manhole pedestal, for example, Patent Documents 1 and 2.

Patent Literature 1 discloses a structure in which a plurality of through holes are provided along the periphery of a manhole cover, a step is formed at the center of the through hole, a step groove is formed in the longitudinal direction on the upper surface of the step, The projections formed on the head portion of the fixing member are inserted into the stepped grooves while the attached fixing members are elastically coupled with each other via the springs, while the locking grooves are formed in the lower portion of the supporting frame to rotate the fixing member, And is structured so as to be fixed or unfixed to the groove,

Patent Literature 2 discloses a manhole cover in which a lock groove is formed at a plurality of locations of a manhole cover, a lock comprising a pressing portion on the inner wall surface of the manhole cover and a lever on the opposite side of the manhole cover, And an operating bolt which is fastened to a screw groove formed in the fastening groove portion through the lever and is lowered by a socleaner to lower the lever of the fastening lever so that the pushing portion presses and fixes the side of the manhole cover

Such a conventional manhole cover fixing or locking device is complicated in structure and only a part of the manhole cover is fixed to the manhole cover, so that if the impact is applied from the outside, there is a problem that the cover is detached from the manhole cover.

Patent Document 3 discloses a technique in which a multi-point is fixed to a manhole pedestal by improving the above disadvantages. Patent Literature 3 discloses a technique in which a plurality of mounting holes are formed at a lower end of an inner circumferential surface of a manhole frame, The male screw portion is inserted into the center of the manhole cover so as to be rotatable so that the male screw portion is rotatably inserted into the male screw portion, As shown in Fig.

In the conventional manhole cover fixing or locking device, the water flowing through the bottom of the manhole cover flows into the screw portion and the screw hole is corroded, so that the manhole cover can not be firmly fixed. When the cover is opened, the corroded screw is not released It is difficult to open.

1. Korean Patent No. 10-0404540 2. Korean Patent No. 10-1006072 3. Korean Patent No. 10-0693489

The present invention has been developed in order to solve the problems of the related art as described above, and it is an object of the present invention to provide a lubricant storage space in a lower portion of a nut tube portion formed at the center of a nut plate, And a lubrication material is supplied to the bolt body by filling the lubricant, so that the bolt body can be smoothly tightened and loosened.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided an apparatus for locking a lid of a manhole, the lid being detachably attached to a through hole formed at the center of the manhole bracket, A nut plate fixing vane is formed, and two or more nut plate fixing grooves are formed in the nut plate fixing vane,

A nut plate provided detachably to the nut plate fixing groove, a nut tube portion formed at a center thereof with a spiral groove, and a tubular leakage preventing tube portion formed at an upper end of the nut tube portion; A bolt tube formed on an outer circumferential surface of the nut tube portion formed at the center of the nut plate, the bolt tube being tightened; The bolt tube is integrally coupled to the bolt tube through the through hole formed at the center of the lid and the bolt head is rotated to rotate the bolt tube so that the bolt tube is tightened to the nut tube portion of the nut plate, And a fixing shaft for fixing the fixing shaft.

Preferably, a waterproof cap is further provided at the upper end of the leakage preventing tube portion to prevent water flowing into the bottom of the lid from flowing into the leakage preventing tube portion.

An O-ring may be further provided in the through-hole formed in the center of the lid to prevent water from leaking between the through-hole and the tightening shaft.

A lubricant storage space may be integrally formed at a lower portion of the nut tube portion of the nut plate to store the lubricant supplied to the bolt tube that is tightened to the nut tube portion.

The tightening shaft is inserted into the bolt body when it is injected, and at least one insert hole is formed so that the bolt body is not separated.

A hinge protrusion is provided on one side of the lid and a hinge groove is formed in a portion of the manhole cover opposite to the hinge protrusion so that the lid is opened to be rotatable with respect to the manhole cover in a state where the lid is separated from the nut plate .

As described above, the one-bolt hinge-type lock-manhole cover according to the present invention forms a water-leakage prevention tube portion, and a waterproof cap is provided at the upper end thereof to be brought into close contact with the bottom surface of the lid, It is possible to prevent penetration.

Further, lubricant storage space is formed in the lower part of the nut tube to supply the lubricant to the bolt tube body, thereby preventing corrosion between the bolt tube body and the nut tube part, thereby easily rotating the bolt tube body. There is also an effect that can be made.

On the other hand, in the process of manufacturing the bolt body, the time and cost required for the manufacture can be reduced by inserting the tightening shaft integrally.

1 is a perspective view of an example of a manhole having a lock manhole cover according to the present invention;
2 is a cross-sectional view of an example of a manhole with a lock manhole cover according to the present invention
Fig. 3 is an enlarged view of a portion A in Fig. 2
4 is an exploded perspective view of an example of a manhole having a lock manhole cover according to the present invention.
5 is a sectional view of a manhole with a lock manhole cover according to the present invention in a fixed state and a separated state;
FIG. 6 is a cross-sectional view of a manhole having a lock manhole cover according to the present invention cut along a hinge portion; FIG.
Fig. 7 is an operational state diagram of the hinge portion shown in the enlarged view of portion B in Fig. 6

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

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

According to the present invention, leakage of water can be prevented to prevent corrosion of the locking means. Accordingly, the lid can be more firmly fixed to the manhole pedestal, and the opening and closing of the lid can be facilitated.

The one-bolt hinge-type lock-manhole lid of the present invention is a device for fixing a lid of a manhole constructed by disposing a lid 20 in a through-hole formed at the center of a manhole pedestal 10, A nut plate fixing wing 10w is formed downward at the center of the nut plate fixing groove, and at least two nut plate fixing grooves 10h are formed in the nut plate fixing wing, A nut plate 30 formed with a spiral groove 31s and a nut plate 30 having a tubular leakage preventing tube portion 31d formed at an upper end of the nut tube portion; A bolt tube (50) formed on an outer circumferential surface of a spiral groove (50) tightened in a nut tube portion formed at the center of the nut plate; The bolt tube is integrally coupled to the bolt tube through the through hole formed at the center of the lid and the top head is rotated to rotate the bolt tube body so that the bolt tube body is fastened to the nut tube portion of the nut plate, (Not shown).

The manhole pedestal 10 is installed at the entrance of the manhole and is fixed to the manhole entrance by a part of the lower end fixed by being fixed in the ground.

As shown in FIGS. 2, 3 and 4, the manhole pedestal 10 has an entrance formed at its center, and a nut plate fixing blade 10w extending downward is formed on the inner wall of the entrance. At least two nut plate fixing grooves 10h are formed in the nut plate fixing wing 10w in a direction symmetrical to each other.

A fixing protrusion 30f protruding from the edge of the nut plate 30 is inserted into the nut plate fixing groove 10h.

The lid 20 is in the shape of a plate having the same outer circumference as the entrance formed in the center of the manhole pedestal 10. The surface of the lid 20 is used for the use of the manhole, that is, a manhole, a manhole, Is displayed. Of course, a handle may be further provided on one side to facilitate detachment from detachment from the manhole pedestal.

A through hole 20h through which the tightening shaft 40 penetrates is formed in the center of the lid 20. A groove is formed in the main surface of the through hole 20h, The head (40h) was positioned so that the head of the bolt was not exposed to the outside of the lid. Of course, in the groove formed outside the through hole, a stopper may be further provided to prevent foreign matter from being caught in the groove.

The nut plate 30, the tightening shaft 40 and the bolt tube 50 are provided as means for fixing the lid 20 to the manhole bracket 10).

The nut plate 30 is detachably attached to the manhole pedestal 10 and is a means for fixing the tightening shaft 40 passing through the lid. The nut plate 30 is a circular plate having a diameter smaller than the diameter of the entrance formed in the manhole pedestal 10, A fixing protrusion 30f may be formed on the plate body or a plurality of fixing protrusions 30f may be formed on the outer circumferential surface of the circular ring as shown in Fig.

Of course, in the case of a circular ring shape, a connecting rod is integrally provided in a radial direction to connect the nut tube portion 31 provided at the center.

The nut tube portion 31 has a spiral groove 50s formed on the outer circumferential surface of the bolt tube 50 provided at the lower end of the tightening shaft 40, It is tightened and tightened or loosened.

The upper end of the nut tube portion 31 is extended toward the lid to form a leakage preventing tube portion 31d. The leakage preventing tube portion 31d is in close contact with the bottom surface of the lid as shown in FIGS. 2, 3 and 5 As shown in FIG.

The water leakage preventing tube portion 31d serves to prevent water from flowing into the thread groove 31s or 50s of the nut tube portion 31 and the bolt tube 50 located inside the water leakage preventing tube portion 31d.

It is preferable that a waterproof cap 60 is installed at the upper end of the leakage preventing pipe portion 31d to prevent water flowing to the bottom of the lid from flowing into the leakage preventing pipe portion.

As shown in FIG. 3, the waterproof cap 60 is formed in the shape of a circular ring having a groove in which the end portion of the leakage preventing tube portion is inserted, and may be made of elastic rubber or synthetic resin.

In addition, it is preferable that a lubricant storage space 32 in which a lubricant supplied to the bolt tube 50, which is fastened to the nut tube portion, is integrally formed at the lower end of the nut tube portion 31.

The one-bolt hinge-type lock-manhole cover of the present invention is mainly installed outdoors and is exposed to rain or wind. When it is not operated for a long time, the bolt tube 50 and the helical grooves 31s, 50s The bolt tube 50 is not separated from the spiral groove 31s of the nut tube portion 31 even if the tightening shaft 40 is rotated to open the lid.

The lubricant is supplied to the spiral grooves 31s and 50s of the bolt body 50 and the nut tube 31 to separate the spiral grooves 31s and 50s of the bolt tube 50 and the nut tube 31 Thereby preventing sticking between the two.

It is the bolt tube 50 that is separated or tightened from the spiral groove of the nut tube 31 in the rotation of the tightening shaft 40.

The bolt head 40h on the upper end of the tightening shaft 40 is rotated to rotate the bolt body 50 to rotate the nut tube 31).

The bolt tube 50 may be integrally formed with the tightening shaft 40.

That is, the tightening shaft 40 is inserted when the bolt tube is injected, and can be made integral with the bolt tube 50. As shown in FIG. 3, at least one insert hole 40i is formed in the tightening shaft 40, which is injected into the body during the injection of the bolt tube, and the material of the bolt tube injected into the insert hole penetrates into the insert hole, .

A through hole is formed at the center of the lid 20 constituting the one-bolt hinge-type lock-manhole cover of the present invention. In order to prevent penetration of rainwater through the through-hole, A washer can be installed beneath the head 40h. However, since rainwater can penetrate along the tightening shaft, an o-ring 70 is further provided in the through-hole formed in the center of the lid 20 so that the through- It is preferable to prevent the water from leaking through the openings 40.

As shown in FIG. 5, when the tightening shaft 40 is rotated, the bolt body 50 rotates and the outer circumferential surface of the bolt tube body rotates according to the rotation of the bolt tube body. The bolt head 40h at the center of the nut plate 30 moves along the helical groove 50s formed in the screw shaft 40. When the bolt tube is tightened, The bolt head 40h of the tightening shaft 40 is fixed to the manhole pedestal fixed to the nut plate by pulling the lid 20 toward the nut plate side and when the bolt body is released, And the nut 20 is separated from the nut plate, thereby separating the nut plate from the fixed manhole pedestal.

1, a hinge protrusion 21 is provided at one side of the lid 20, and a portion of the hinge protrusion 21 opposed to the hinge protrusion of the manhole pedestal 10 A hinge groove 11 is further formed.

When the bolt tube 50 is completely separated from the nut tube portion of the nut plate by rotating the tightening shaft 40 provided at the center of the lid, the hinge protrusion 21 and the hinge groove 11 are formed at one end of the lid, When the opposite end of the protrusion 21 is lifted, the lid can be rotated around the hinge groove to be opened.

6 and 7, a hinge pin 11p is formed on a wall of the hinge groove 11 so as to be positioned inside the rotating space 21a. Is installed.

When the bolt tube 50 is sufficiently tightened to the nut tube portion 31 of the nut plate by tightening the tightening shaft 40, the hinge pin 11p provided in the hinge groove as shown in Fig. 7 (a) When the bolt tube 50 is separated from the nut tube portion 31 of the nut plate and the lid is lifted, the bolt tube 50 is loosened as shown in Fig. 7 (b) As shown in the figure, the hinge pin 11p provided on the hinge groove is placed under the rotating space 21a formed in the hinge protrusion. When the lid is rotated in this state, as shown in Fig. 7 (c) The lid can be pivoted with one side of the space being supported by the hinge pin. In this state, when the lid is lifted up, the lid is separated from the manhole cover.

10: Manhole bracket
10w: Nut plate fixing wing 10h: Nut plate fixing hole
11: Hinge groove
20: Lid
20h: Through hole
21: Hinge projection
30: Nut plate
30f: Fixing projection
31: Nut Tube 31s: Spiral groove
31d: Leak prevention tube
32: Lubricant storage space
40: Tightening axis
40i: insert hole 40h: bolt head
50: Bolt tube
60: Waterproof cap
70: O ring

Claims (6)

A nut plate fixing wing 10w is disposed at the center of the manhole holder 10 in a downward direction so as to fix a lid of a manhole configured to be detachably attached to a through hole formed at the center of the manhole holder 10, A nut tube portion 31 formed at the center thereof with a spiral groove 31s, and a nut tube portion fixing groove 10h formed in the nut plate fixing wing so as to be detachable from the nut plate fixing groove, A nut plate (30) formed on the base plate; A bolt tube (50) having a helical groove (50s) tightened in a nut tube portion formed at the center of the nut plate, the bolt tube (50) being formed on the outer circumferential surface; The bolt tube is integrally coupled to the bolt tube through the through hole formed at the center of the lid and the top head is rotated to rotate the bolt tube body so that the bolt tube body is fastened to the nut tube portion of the nut plate, (40), wherein the fastening shaft
An O-ring 70 is further provided in the through hole formed at the center of the lid 20 to prevent water from leaking between the through hole and the tightening shaft 40,
A lubricant storage space 32 is formed at a lower portion of the nut tube 3 of the nut plate 30 to store the lubricant supplied to the bolt tube 50 tightened to the nut tube,
The tightening shaft 40 is inserted into the bolt tube 50 when it is injected, and one or more insert holes 40i are formed so as not to separate the bolt tube,
A hinge protrusion 21 is provided at one side of the lid 20 and a hinge groove 11 is formed at a portion of the manhole pedestal 10 opposite to the hinge protrusion. A one-bolt hinge-type lock-up manhole cover in which a lid is rotatably opened with respect to a manhole cover,
The nut plate 30 is formed by forming a plurality of fixing protrusions 30f on the outer circumferential surface of the circular ring, and a connecting rod is integrally formed radially to connect the nut tube portion 31 provided at the center with the fixing protrusions,
An upper end of the nut tube portion 31 of the nut plate is provided with a tubular body leakage preventing tube portion 31d for blocking water from flowing into the helical grooves 31s and 50s of the nut tube portion 31 and the bolt tube 50 located inside And a waterproof cap (60) in the form of a circular ring in which an end portion of the water leakage preventing tube portion (31d) is fitted is formed on the bottom of the water leakage preventing tube portion (30d) Type lock Manhole cover. delete delete delete delete delete

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