KR101949792B1 - Locking apparatus of manhole cover - Google Patents

Abstract

The present invention relates to a locking apparatus for a manhole cover, which improves a structure of the locking apparatus for a manhole cover so that an operator is possible to exactly recognize a locking state and an opening state of the manhole cover. To this end, the present invention has a clamp (40) in which a rotary shaft (30) is inserted through a penetration hole (18) and which has an inclined surface (43).

Description

{Locking apparatus of manhole cover}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole cover for closing an opening of a manhole, and more particularly, to a manhole cover locking apparatus for preventing a manhole cover from being opened by a shock or the like while a manhole cover is closed.

Generally, the manhole is installed at predetermined intervals to install and maintain power and communication lines underground, or to maintain the underground pipeline of the wastewater, and an opening is formed for facilitating access to the inside , And a lid is provided in the opening.

That is, a normal manhole is provided with a manhole pedestal at an entrance of the upper part, and a lid is provided to open and close an opening at the center of the manhole pedestal.

If the lid is not fixed firmly to the manhole support, the lid must be firmly fixed to the manhole support because there is a problem that the lid rattles or the lid detaches from the manhole support during the passage of the vehicle through the manhole.

However, since the lid is required to be separated from the manhole pedestal and can open the opening, the lid should be installed so that it can be opened and closed. The lid provided in such a manner as to be openable and closable is not fixed to the manhole pedestal, A problem of shaking occurs.

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 projecting portion formed on the head of the fixing member is inserted into the stepped groove while a hooking groove is formed in the lower portion of the supporting frame so that the hooking portion is hooked And is configured to fix or unfasten it to the groove.

Patent Literature 2 discloses a manhole cover in which a lock groove is formed at a plurality of positions on the edge of a manhole cover and a lock is formed on the inner wall surface of the manhole cover on the basis of a support shaft supported by the lock groove portion and a lever on the opposite side; And an operating bolt for pressing and fixing the side surface of the manhole cover when the lever of the latch is lowered and rotated by being lowered by the screw hole formed in the latch groove portion through the lever

However, such a conventional manhole cover fixing or locking device has a complicated 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 Document 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, And a male threaded portion that is fastened to the female thread portion of the support rod is inserted into the hole of the male threaded portion of the male threaded portion of the male threaded portion, And is formed on the lower side of the screw.

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 portion is not loosened It is difficult to open.

In order to solve the above-mentioned problem, a new type manhole cover locking device has been filed and published as 10-2013-67742 (published on June 25, 2013).

FIG. 1 is a perspective view showing a structure of a conventional locking lock type manhole cover locking device, FIG. 2 is a sectional view showing the structure of a conventional locking lock type manhole cover locking device, and FIG. 3 is a view showing a structure of a conventional locking lock type manhole cover locking device The conventional apparatus can be installed at least one perimeter of the manhole cover 10, but it is preferable that the most stable number is two or three in a bidirectional symmetrical position or an equilateral triangle structure.

The upper and lower rotation type fasteners 14 and 15 have a half-moon shape or arc structure as shown in FIG. 1 and are rotated together with the rotation axis about the rotation axis 12, and the rotation axis 12 is provided on the manhole cover 10 And is rotatably and axially coupled.

Particularly, the upper end of the rotary shaft 12 is formed with a manipulation part 13 composed of one or more cross-shaped grooves so as to be able to rotate strongly by using a jig. The upper part of the rotation part 12 can be rotated in the shaft hole of the manhole cover, So that they are not separated from the lid 10 up and down.

The upper and lower rotation brackets are made of semicircular or semicircular shapes, and the opposite surfaces of the upper and lower brackets are inclined at an angle symmetrical to each other. (11) of the manhole cover (10), and the other end is spaced at a smaller distance than the sum of the thicknesses of the engagement step (21) and the inward step (11).

Therefore, when the upper and lower rotary clamps 14 and 15 are rotated in the forward direction, the gap between the engagement protrusions 21 of the manhole cover 20 and the manhole cover 10 The inwardly facing step 11 has to be locked and fixed, and if it is rotated in the opposite direction, it can be released from the locked state.

Therefore, when the operation unit 13 provided at the upper end of the rotary shaft 12 is rotated in the forward direction by using a jig, the upper and lower rotary claws 14 and 15 that rotate integrally with the rotary unit 12 are rotated, The manhole cover 10 and the manhole cover 20 are locked to each other when the inward step 11 of the manhole cover 10 and the locking protrusions 21 of the manhole cover 20 are tightened together with the vise.

Even if the upper plate of the manhole cover 20 undergoes deflection deformation, the upper and lower rotary clamps 14 and 15 directly fix the inwardly facing step 11 and the engagement step 21 to fix the deformation of the upper plate, So that a good locking state is maintained.

On the other hand, when the jig is rotated in the opposite direction, the upper and lower rotary clamps 14 and 15 rotate in the reverse direction together with the rotary shaft 12 to rotate the inward step 11 of the manhole cover 10, The manhole cover 10 is freed from the manhole cover 20 and can be opened.

(Prior art document)

(Patent Document 0001) Korean Registered Patent No. 10-0404540 (Registered on October 24, 2003)

(Patent Document 0002) Korean Registered Patent No. 10-1006072 (Registered on December 29, 2010)

(Patent Document 0003) Korean Registered Patent No. 10-0693489 (Registered on March 3, 2007)

(Patent Document 0004) Korean Published Patent Application No. 10-2013-0067742 (published on June 25, 2013)

However, such a conventional apparatus has the following problems.

First, since the operator does not have the function of confirming whether the upper and lower rotary pawls formed on the rotary shaft are caught by the inward-facing step and the jaws and the jammed state is released during the opening and closing operation of the manhole cover, .

Secondly, even if the upper and lower rotary pawls are held by the inwardly facing step and the engagement jaws, the upper and lower rotary pawls are not fully engaged and a part (about 1/2 or less) There was a fatal defect that the upper and lower rotary claws made of cast iron were broken.

Thirdly, since the lower rotating type pawl directly touches the lower end of the metal pawl, every time the vehicle passes over the upper part of the manhole cover, severe noise is generated and the lower rotating pawl is broken by the impact.

Fourth, since the manhole cover, the manhole cover, and the locking device are manufactured, there is a limit to precisely manage the height of the locking jaw and the inward-facing step and the gap between the upper and lower rotary hooks.

Fifth, since the inward step of the manhole cover directly touches the upper surface of the hanging jaw of the manhole cover, the rainwater can not be kept airtight, and the rainwater has flowed into the manhole through the gap.

Sixth, the operation part is exposed to the upper part of the manhole cover, so that the soil or the stones can not be easily inserted and the rotating shaft can not be rotated quickly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to improve the structure of the manhole cover locking device so that the operator can accurately recognize the locked state and the open state of the manhole cover, There is a purpose.

Another object of the present invention is to effectively absorb shock generated even when a vehicle passes through a manhole cover in a locked state of a manhole cover to prevent noise from being generated.

It is another object of the present invention to fundamentally eliminate the phenomenon that rainwater is introduced into the inside of the manhole by maintaining the airtightness of the connecting portion of the manhole cover and the manhole cover.

A further object of the present invention is to form the head of the rotary shaft lower than the depth of the insertion hole formed in the manhole cover, and cover the head with the rubber cap to close the insertion groove.

According to an aspect of the present invention for achieving the above object, a rotary shaft is inserted through a through hole in a state where a head part is provided in an insertion groove formed in a manhole cover, and a lower end of the rotary shaft is hooked to a lower end of a chin- A manhole cover locking device comprising a lock having a photograph slope, characterized in that the head is polygonal, the height is set lower than the depth of the insertion groove, the rubber cap having the lead- The cap is fitted to the upper surface of the manhole cover, the square lower end of the rotary shaft is fitted to the square fitting hole of the locker, and the first and second stoppers are formed so as to have a phase difference of 90 ° with respect to the lock, The first stopper is formed to be shorter than the long side at the long side of the fastener, and the second stopper is formed at the short side of the fastener, So that the first and second stoppers come into contact with the vertical wall of the latching jaw alternately in the opening and closing states of the manhole cover and on the bottom surface of the latching jaw of the manhole cover, Characterized in that the vibration absorbing member is fixed to the annular groove so as to protrude lower than the step of the inclined surface, and a rubber pad is provided between the upper surface of the engaging projection of the manhole cover and the bottom surface of the manhole cover. Is provided.

The present invention has various advantages as compared to the prior art.

First, the first and second stoppers are formed on the latch, so that the first and second stoppers alternately contact the vertical wall of the latching jaw formed on the manhole cover according to the opening and closing of the manhole cover, so that the operator can lock and unlock the manhole cover It can be quickly and accurately understood without being identified with the naked eye.

Second, when the manhole cover is locked, the rotating shaft is rotated until the first stopper is caught by the vertical wall of the stopping jaw, so that the whole of the inclined surface always touches the vibration absorbing member. Therefore, Even if it is applied to the catch, it will prevent the catch from breaking.

Thirdly, since the inclined surface of the pawl touches the vibration absorbing member inserted and fixed to the bottom surface of the engaging jaw, the vibration absorbing member absorbs the vibration applied even when the vehicle passes the upper portion of the manhole cover, thereby minimizing the generation of noise.

Fourth, rubber pads are provided on the upper surface of the latching jaw of the manhole cover to keep airtightness with the manhole cover, so that rainwater does not flow into the manhole.

Fifth, since the rubber cap covers the head portion of the rotary shaft and the insertion groove is closed, the insertion groove prevents the clogging of the soil or the boulder.

1 is a perspective view showing a structure of a conventional lock-type manhole cover locking device;
2 is a cross-sectional view showing the structure of a conventional lock-type manhole cover locking device
3 is a cross-sectional view showing the structure of a conventional locking lock type manhole cover locking device
4 is an exploded perspective view showing a main part of the present invention.
FIGS. 5A and 5B are longitudinal sectional views showing the operation of the present invention,
5A is a state in which the locked state of the manhole cover is released
5B shows a state in which the manhole cover is locked by the rotation of the rotary shaft
6A is a sectional view taken along the line A-A in Fig.
FIG. 6B is a cross-sectional view taken along the line B-B in FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. The drawings are schematic and illustrate that they are not drawn to scale. The relative dimensions and ratios of the parts in the figures are shown exaggerated or reduced in size for clarity and convenience in the figures, and any dimensions are merely illustrative and not restrictive. And to the same structure, element or component appearing in more than one drawing, the same reference numerals are used to denote similar features.

FIG. 4 is an exploded perspective view showing the main part of the present invention, and FIGS. 5A and 5B are longitudinal sectional views showing the operation state of the present invention, wherein the through hole 18 formed in the insertion hole 17 of the manhole cover 10 The height b of the head 31 is smaller than the depth a of the insertion groove 17. The height b of the head 31 is smaller than the depth a of the insertion groove 17, When the rubber cap 70 having the lead groove 71 on both sides of the upper surface is inserted into the insertion groove 17 as shown in FIG. 5B, the rubber cap 70 surrounds the head 31, 17 is closed and coincided with the upper surface of the manhole cover 10 so that vibration applied to the rotation shaft 30 is minimized even when the vehicle passes over the upper surface of the manhole cover 10, So that foreign matter such as stones can be prevented from being trapped.

It is more preferable that the rotation shaft 30 rotatably installed in the manhole cover 10 is provided with about three to maintain a more stable locked state of the manhole cover 10. [

A square insertion portion 32 is formed at the lower end of the rotary shaft 30 installed through the through hole 18 communicating with the insertion groove 17 and a square fitting hole 44 is formed in the latch 40 The insertion portion 32 of the rotary shaft 30 is inserted into the square fitting hole 44 and the split pin 80 is inserted into the hole 33 formed in the insertion portion 32 to assemble them.

The first stopper 41 and the second stopper 41 are formed integrally with the pawl 40 so that the first and second stoppers 41 and 42 protrude upwardly from the long side 45 of the pawl 40, And the second stopper 42 is formed so as to coincide with the end of the long side 45 at the short side 46 of the catch 40. The first and second stoppers 41, Since the operator touches the vertical wall 21a of the latching jaw 21 alternatively in accordance with the opening and closing states of the manhole cover 10 so that the operator can check the opening and closing state of the manhole cover 10, .

An annular groove 22 to which the vibration absorbing member 50 is fixed is formed on the bottom surface of the engaging jaw 21 of the manhole cover 20. A step t of the inclined surface 43 is formed in the annular groove 22, The vibration absorbing member 50 is fixed so as to protrude to a lower position so that the rotary shaft 30 is rotated so that the inclined surface 43 of the bracket 40 enters the vibration absorbing member 50, As the projecting amount is set to be lower than the step t of the inclined surface 43 so that the rotation of the rotary shaft 30 after the vibration absorbing member 50 is not pressed and reaches the apex of the inclined surface 43 of the latch 40, Absorbing member 50 is pressed and deformed by the upper surface of the latch 40 to prevent the vibration transmitted to the latch 40 from being transmitted to the latching jaw 21 side.

In addition, a ring-shaped rubber pad 60 is provided between the upper surface of the engagement protrusion 21 of the manhole cover 20 and the bottom surface of the manhole cover 10 to keep airtightness therebetween, Thereby preventing the phenomenon of flowing in, and absorbing the applied vibration.

The operation of the present invention will be described below.

First, when the rotary shaft 30 is inserted through each through hole 18 formed in the manhole cover 10, the head 31 of the rotary shaft 30 formed in a polygonal shape is formed to be larger than the through hole 18, The head portion 31 is positioned inside the insertion groove 17 as shown in FIG.

The insertion portion 32 having a square shape formed at the lower end of each rotary shaft 30 is inserted into the square engaging hole 44 formed in the fastener 40, The split pin 80 is inserted into the hole 33 of the insertion portion 32 exposed at the lower end of the latch 40 and the one end of the split pin 80 is bent as shown by the dotted line in FIG. The assembly of the rotation shaft 30 and the latch 40 fitted into the through hole 18 through the insertion groove 17 of the manhole cover 10 is completed.

Thereafter, when the vibration absorbing member 50 is inserted into the annular groove 22 formed in the bottom surface of the engaging step 21 of the manhole cover 20, the vibration absorbing member 50 is fitted to the inclined surface 43 of the bracket 40 (T).

After the rotary shaft 30 and the latch 40 are assembled to the manhole cover 10 in this way, before the opening formed in the manhole cover 20 is closed by the manhole cover 10, Shaped rubber pads 60 on the upper surface of the manhole cover 21 and then close the opening with the manhole cover 10.

At this time, the position of the second stopper 42 of the latch 40 mounted on the manhole cover 10 is adjusted so as not to be interfered by the vertical wall 21a of the latching jaw 21, 10 should be assembled to the manhole cover 20.

In the state where the latch 40 protrudes toward the latching jaw 21, the latching jaw 21 interferes with the latching jaw 21, so that the manhole cover 10 can not be closed.

That is, when the latch 40 closes the manhole cover 10 in the state as shown in FIGS. 5A and 6A, the rotation shaft 30 must be rotated to maintain the locked state of the manhole cover 10.

5A, when the wrench 90 is inserted into the head 31 through the insertion groove 17 and the rotary shaft 30 is rotated in the counterclockwise direction as shown by the arrow in FIG. 6A, The inclined surface 43 does not touch the vibration absorbing member 50 which is inserted and fixed so as to protrude from the bottom surface of the engaging step 21 as indicated by the dotted line in Fig. 5A, and the first stopper 41 The uppermost point of the inclined surface 43 touches the vibration absorbing member 50 at the time when it touches the vertical wall 21a of the engaging jaw 21 so that the vibration absorbing member 50 is pressed and the manhole cover 10 is completely It is locked.

As described above, when the manhole cover 10 is locked with the use of the latch 40, the vibration absorbing member 50 is not initially touched by the inclined surface 43, and at the time when the latch 40 is locked, It is possible to prevent the vibration absorbing member 50 from being torn due to the opening and closing of the manhole cover 10. [

The rubber pads 60 provided on the upper surface of the latching jaw 21 are compressed when the manhole cover 10 is locked so that airtightness between the manhole cover 10 and the manhole cover 20 is maintained.

The above operation is performed until the locking device installed on the manhole cover 10 is completely locked.

After the manhole cover 10 is locked to the manhole cover 20, the wrench 90 is detached and the rubber cap 70 is inserted into each of the insertion grooves 17 to close the insertion groove 17. 70 are aligned with the upper surface of the manhole cover 10, no step is formed on the upper surface of the manhole cover 10. [

The rubber pad 60 is installed between the manhole cover 10 and the manhole cover 20 when an impact is applied as the vehicle passes the upper portion of the manhole cover 10 while the manhole cover 10 is locked And the latch 40 is in contact with the vibration absorbing member 50 fixed to the bottom surface of the latching jaw 21, thereby minimizing the occurrence of noise.

On the other hand, when the opening of the manhole cover 20 is to be opened for maintenance of the manhole, the locked state of the manhole cover 10 must be released.

In order to release the locked state of the manhole cover 10, a tool such as a screwdriver is inserted into the drawing groove 71 of the rubber cap 70 which has closed each insertion groove 17, The cap 70 is removed so that the head 31 of the rotary shaft 30 is exposed to the outside.

The wrench 90 is inserted into the head 31 and the rotary shaft 30 is rotated until the second stopper 42 of the latch 40 comes into contact with the vertical wall 21a of the latching jaw 21, The locking state of the manhole cover 10 can be released and the manhole cover 10 can be opened, so that the unlocking of the manhole cover 10 becomes very convenient.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention may be embodied with various changes and modifications without departing from the scope of the invention. will be.

It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive, the scope of the invention being described in the foregoing specification is defined by the appended claims, Ranges and equivalents thereof are to be construed as being included within the scope of the present invention.

10: Manhole cover 17: Insert groove
18: through hole 20: manhole base
21: latching jaw 21a: vertical wall
22: annular groove 30: rotation axis
31: head part 32: insertion part
40: a latch 41: a first stopper
42: second stopper 43: inclined surface
44: engaging hole 50: vibration absorbing member
60: rubber pad 70: rubber cap
71: withdrawal groove 80: split pin

Claims (1)

The rotary shaft 30 is inserted through the through hole 18 while the head 31 is engaged with the insertion groove 17 formed in the manhole cover 10 and the manhole cover 20 is inserted into the lower end of the rotary shaft 30, (B) is a polygonal shape with the head portion (31) being polygonal and the height (b) being a polygonal shape with a height The rubber cap 70 is closed with the insertion groove 17 closed while the head portion 31 is wrapped with the rubber cap 70 having the lead groove 71 on the upper surface while setting the depth of the groove 17 to be lower than the depth a of the groove 17, The square insertion portion 32 formed at the lower end of the rotary shaft 30 is fitted to the square fitting hole 44 of the latch 40 so as to be aligned with the upper surface of the manhole cover 10, The first and second stoppers 41 and 42 are formed on the long side 45 of the fastener 40 so that the first and second stoppers 41 and 42 have a phase difference of 90 ° with respect to the fastener 40, way the second stopper 42 is formed so as to be coincident with the end of the long side 45 at the short side 46 of the latch 40 so that the first and second stoppers 41 and 42 are shorter than the manhole lid 45, The vibration absorbing member 50 is fixed to the bottom surface of the engaging jaw 21 of the manhole cover 20 so that the vibration absorbing member 50 contacts the vertical wall 21a of the engaging jaw 21 alternatively in the open / An annular groove 22 is formed and the vibration absorbing member 50 is fixed to the annular groove 22 such that the vibration absorbing member 50 protrudes below the step t of the inclined surface 43, 21) and a bottom surface of the manhole cover (10), a rubber pad (60) is installed;
The lead grooves 71 are formed on both sides of the upper surface of the rubber cap 70,
Three rotary shafts 30 are provided to maintain a more stable locked state of the manhole cover 10,
A split pin (80) is fitted into the hole (33) formed in the square insertion portion (32)
The split pin 80 is inserted into the hole 33 provided in the square insert part 32 and the one end of the split pin 80 is bent,
The rubber pad 60 is ring-shaped,
The wrench 90 is inserted into the head 31 through the insertion groove 17 and the rotation shaft 30 is rotated counterclockwise to completely lock the manhole cover 10,
A driver is inserted into the lead groove 71 of the rubber cap 70 which has closed the insertion groove 17 and is bent so that the rubber cap 70 is inserted in the insertion groove 17 to release the locked state of the manhole cover 10. [ Is removed.

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