KR101458360B1 - For easy release when inoperative locks for manholes - Google Patents

Abstract

The present invention relates to a manhole locking device capable of easily unlocking a manhole when the locking device does not work, in which the locking device is installed to easily release a manhole lid when the locking device does not work at the winter season or due to other problems, and the disassembled locking device can be easily assembled to normally operate. The manhole locking device includes a lid frame provided with an assembled shoulder at the inner diameter and circumferential teeth below the inner diameter; a rotary member provided at an installation groove of the manhole lid to be locked to unlocked from the circumferential teeth of the assembling shoulder, and having a bolt passing hole at the center thereof, and a bolt head groove and a release groove at an upper center; a locking member penetrating the through-hole formed in a lower center of the installation groove, and having a bolt hole at an upper portion, a lower installation ring, and engaging bosses engaged with the circumferential teeth; a fixing bolt positioned at the bolt head groove of the rotary member and penetrating the holt passing hole to be engaged to the bolt hole formed in the upper portion of the locking member; and a spring positioned below the rotary member to maintain the locking state of the manhole lid at the installation hole. The manhole has guide grooves on both sides of the through-hole which are engaged with a release preventing boss, and a spring seat on the outer peripheral surface of the through-hole.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention < RTI ID = 0.0 > [0004] < / RTI &

The present invention relates to a manhole locking device which can be easily released when the locking device is inoperable. More particularly, the present invention relates to a locking device for preventing the detachment of a manhole cover, The lock device can be easily released even if an incapacity state occurs and the unlocked lock device can be assembled straight again to enable normal operation.

Generally, a manhole is a hole made for allowing people to go out from the road surface to the underground, and it is installed in a public manhole for collecting sewage and rainwater on the road and an underground distribution line The underground distribution manhole.

The underground distribution manhole should be constructed so as to prevent the inflow of rainwater or sewage into the inside of the manhole in order to protect various distribution lines installed inside.

For this purpose, Patent Registration No. 0551592 is applied to an underground distribution manhole, and a manhole having a conventional locking device is largely composed of a lid, a manhole cover, and a locking device that is contained in the manhole cover to perform a locking function. , And the coupling relation by each shape will be described as follows.

First, the assembly jaw and the sealing boss are protruded from the inner periphery of the lid frame, respectively, and the protruded assembly jaws and the assembling jaw of the sealing lid are protruded further toward the inner periphery side to form the locking space.

The lower end of the manhole cover is assembled along the outer periphery of the inner periphery of the cover frame, and a portion of the manhole cover opposite to the lock space, which is further inward than the lower edge of the manhole cover, And a shaft hole and an insertion hole are formed in the upper portion and the lower portion of the locker housing box, respectively, so that the lock device is housed in the locker housing.

Here, the locking device has a semi-circular plate-shaped locking half-disk with a plurality of concave-convex portions formed on the upper portion thereof with an upward inclination in a pivoting direction in which the locking device is locked, and a shaft rod, And a pivot pin is protruded to the lower side of the lock half plate to be inserted into an insertion hole formed immediately below the lock device housing box. Here, the locking device is in a state of being molded and cast beforehand in the casting of the manhole cover.

And a ring-shaped sealing ring of an elastic member having an engaging concave portion is fitted and fitted along the end portion of the closed bar, and a sealing protruding end having an annular shape contacting the sealing ring engaged with the sealing ring is protruded and brought into contact with the lower surface of the manhole cover to be.

After the manhole cover is placed on the cover of the manhole having the conventional locking device, the knob as the force transmitting means is inserted into the shaft rod exposed on the upper part of the manhole cover, and then the lockhole is rotated in the lock rotation direction When rotated, one side of the lock half plate constituting the lock device also pivots toward the lock space of the lid frame.

At this time, the upper surface of the lock half plate is formed with projections and depressions, which are inclined surfaces having a upward inclination along the clockwise direction, so that the height of one side of the lock half plate, which rotates toward the lock space in the clockwise direction, When the knob is continuously rotated in the rotating direction, the distance between the upper surface of the rotating lock half plate and the lower surface of the engaging hole is narrowed and contacted.

Thereafter, when the knob is further turned, the height of the side portion of the lock half plate with the concave-convex portion to be pivotally contacted is slightly larger than the height from the bottom surface (lower portion) A strong pressure between the manhole cover and the lid frame is firmly fixed and a strong pressure transmitted from the lock plate is concentrated on the sealing protruding end protruding from the lower surface of the lock plate so that the sealing ring contact force in contact with the sealing lid So that the waterproof function can be performed.

However, in spite of this advantage, since the manhole with the conventional locking device is applied to the underground distribution manhole, there are the following problems.

In other words, since the underground distribution manhole is provided with various distribution lines inside it, it is necessary to minimize the inflow of the waste water flowing from the road surface into the inside where the distribution line is installed.

However, in the case of a manhole having a conventional locking device,

Since the force applied to the sealing ring is concentrated only in the portion provided with the locking device (3 to 5 depending on size) in the manhole, the rest of the sealing ring, which is relatively weak in transmission of force, (Torsion) is generated, thereby failing to perform the sealing function.

In winter, when snow falls on the road surface, a lot of foreign materials are generated together. As the water penetrates into the lock space and the foreign object gets caught or the temperature is low and it freezes, the locking device does not rotate. At this time, heat is applied to the periphery of the locking device by a torch or the like, and the opened device is melted to release the locking device.

However, in the case where the manhole cover is made of synthetic resin or fiber, not a molding sand, even if the locking device is frozen, it can not be heated by using the torch, so that the manhole cover can not be opened in case of emergency.

Literature 1. Patent Registration No. 0735007 (Registered on June 27, 2007) Document 2. Patent Registration No. 0941051 (Registered on Feb. 01, 2010) Document 3. Patent Publication No. 2011-0107495 (published on October 10, 2011) Literature 4. Patent Registration No. 0508054 (registered on Aug. 04, 2005) Literature 5. Patent Registration No. 1092838 (registered on December 06, 2011)

Accordingly, it is an object of the present invention to provide a manhole cover which can easily open a manhole cover by rotating a manhole locking device composed of a rotary member and a locking member, When the device is not working, the fixing bolt is loosened so that the part can be easily separated without using a fire to release the locking state.

The present invention provides a lock according to an embodiment of the present invention includes a cover frame having an inner diameter formed with an assembling step and a circumferential saw tooth formed at an inner side of the inner diameter,
A rotating member located in the mounting groove and having a bolt through hole at the center thereof and forming a bolt head groove and a releasing groove in the upper center; A locking member having a bolt hole formed on an upper side of a through hole formed in a lower center of the mounting groove and having a lower mounting ring formed thereon and a toothed coupling protrusion coupled to the circumferential tooth at an upper end; A fixing bolt which is located in the bolt head groove of the rotary member and penetrates the bolt through hole and is connected to the bolt hole formed on the upper side of the lock member; And a spring which is positioned below the rotary member and maintains the locked state of the manhole cover in the installation groove,
The manhole cover is formed with guide grooves to which the detachment preventing protrusions are coupled on both sides of the through holes provided on the lower side of the installation groove, and a spring mount is formed on the outer circumference of the through hole.

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The present invention relates to a manhole cover which can easily open and close a manhole cover by rotating a manhole locking device composed of a rotating member and a locking member in a normal state, Or if the manhole locking device does not work due to foreign matter infiltration or the like, the fixing bolt combined with the rotary member is loosened to easily release the rotary member and the spring without using fire, and the locking member falls downward at a predetermined distance to release the locking state So that it is possible to easily open the manhole cover.

The present invention provides an extremely simple structure in which a manhole locking device can be easily installed by combining a spring and a rotating member with a fixing bolt after the locking member is released while the locking member is released, thereby providing an effect that the manhole locking device can be conveniently operated .

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional view of an installation state showing a preferred embodiment of the present invention
Figure 2 is a sectioned state view of the manhole locking device of the present invention
Figure 3 is an enlarged cross-sectional view of the main part of the present invention
4 is an enlarged view of an operating state for a main part of the present invention
5 is an enlarged plan view of the main part of the manhole cover according to the present invention
6 is an enlarged cross-sectional view of the main part of the manhole cover according to the present invention
7 is a plan view of the locking member of the present invention
8 is a front view of the locking member of the present invention
9 is a plan view of the rotating member of the present invention
10 is a cross-sectional view of the rotating member of the present invention
11 is a bottom view of the rotating member of the present invention
12 is a sectional view of an installation state showing another embodiment of the present invention

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

2 is a sectional view of a manhole lock device according to the present invention in a separated state, FIG. 3 is an enlarged cross-sectional view of an installation state for a main portion of the present invention, and FIG. 4 is a cross- FIG. 2 is an enlarged cross-sectional view of an operation state for a main part of the invention.

The manhole cover 10, which is formed of a synthetic resin or a glass fiber or a mixture of a synthetic resin and a glass fiber, is formed in a circular shape, and a plurality of installation grooves 14 are formed at regular intervals in the front- .

The manhole cover 10 is coupled to an assembly jaw 12 formed to protrude to an inner diameter and a lid frame 11 formed with the assembly jaw 12 is formed with circumferential saw teeth 13 in the lower side in the circumferential direction .

The manhole locking device (20) comprises a locking member (21) for locking and releasing as it is engaged with and detached from the circumferential tooth (13);

And the rotary member 30 located on the upper side of the lock member 21 is coupled with the fixing bolt 40. [

A spring 26 is disposed on the outer diameter of the lock member 21 and the rotary member 30 is coupled to the spring 26 from above.

FIG. 5 is an enlarged plan view of the main part of the manhole cover according to the present invention, and FIG. 6 is an enlarged cross-sectional view of the main part of the manhole cover according to the present invention.

The installation hole 14 of the manhole cover 10 in which the manhole cover 20 is installed is formed in a circular shape and a through hole 15 is provided at the center so that the lock member 21 can pass therethrough, And a spring mounting base 17 on which the upper side of the through hole 15 is located and the lower side of the spring 26 is installed is formed on the inside of the mounting groove 14, .

The installation groove 14 can be further provided so that a transparent cap (not shown) is sealed to the upper side or the outer side of the rotary member 30.

FIG. 7 is a plan view of the locking member of the present invention, and FIG. 8 is a front view of the locking member of the present invention.

The locking member 21 is formed so as to have an overall "?" Shape, and protrudes out from the lower end thereof with a toothed coupling protrusion 22 which is engaged with the circumferential sawteeth 13 in the upward direction to be fixed and separated.

The lock member 21 is formed with a lower installation ring 23 located below the manhole cover 10 on the lower side of the portion protruding upward and has a detachment projection 24 on one or both sides of the upper end thereof. A bolt hole 25 is formed on the upper side of the lock hole 21 so that the fixing bolt 40 is engaged with the bolt hole 25 when the lock member 21 is detached.

FIG. 9 is a plan view of the rotary member of the present invention, FIG. 10 is a sectional view of the rotary member of the present invention, and FIG. 11 is a bottom view of the rotary member of the present invention.

The rotation member 30 is formed in a circular shape and has a bolt through hole 33 formed at its center and a member connecting groove 34 in which the upper end of the lock member 21 is assembled to the lower side of the bolt through hole 33 And a protrusion engaging groove 36 is formed on the outer side of the member connecting groove 34 and is fixed to the detachment protrusion 24. The protrusion engaging groove 36 is formed on the upper side of the spring 26, The spring mounting protrusion 35 is formed.

The bolt head groove 31 is formed on the upper surface of the bolt through hole 33 so that the head of the fixing bolt 40 is located below the surface of the bolt head groove 31, The release groove 32 is formed in a straight shape.

12 is a sectional view of an installation state according to another embodiment of the present invention. The installation groove 14 is further formed downward so that the spring 26 is fitted, and a spring mount 17 (20) for forming a spring mounting groove (18) on which the spring (26) is seated without forming a spring (26).

The easily detachable manhole locking device according to the present invention having the above-described configuration is configured to engage the upper side of the lock member 21 from the lower side to the upper side of the through hole 15 of the manhole cover 10, 24 so as to coincide with the guide groove 16 so that the lower installation ring 23 is engaged with the lower side of the through hole 15.

The spring 26 is inserted into the mounting groove 14 of the manhole cover 10 so that the lower side of the spring 26 is engaged with the spring mount 17 and the connecting groove 34 of the rotary member 30 The detachment protrusion 24 is engaged with the protrusion engaging groove 36 to fix the locking member 21 so as not to rotate and then the fixing bolt 40 So that the rotary member 30 and the bolt hole 25 of the lock member 21 are engaged with each other.

The head of the fixing bolt 40 is positioned in the bolt head groove 31 of the rotary member 30 and the bolt hole 25 of the lock member 21 in the member connecting groove 34 passes through the bolt through hole 33 To rotate integrally.

The manhole locking device 20 installed as described above is configured such that when the toothed engaging projection 22 of the lock piece 21 engages with the circumferential saw tooth 13 of the lid 11, Is pushed up from the lower side to the upper side so that the engagement state of the tooth engagement projections 22 and the circumferential cogs 13 is not released so that the locked state of the manhole cover 10 is maintained.

However, if the worker needs to work inside after the manhole cover 10 is installed, if the worker presses the release groove 32 of the rotary member 30 using a tool such as a flat-blade screwdriver, The locking member 21 is moved downward from the through hole 15 while the member 30 is moved downward from the mounting groove 14 and the toothed engaging projection 22 is separated from the circumferential saw tooth 13, Thereby rotating the rotary member 30 in either direction.

The rotation member 30 and the lock member 21 are rotated so that the toothed engaging protrusion 22 is separated from the circumferential saw teeth 13 and the locked state of the manhole cover 10 is released so that the manhole cover 10), so that the operator can enter the manhole.

However, when the manhole lock device 20 is in a state in which the foreign matter penetrates or is freezing in winter and the rotating member 30 does not rotate, the locking state of the locking member 21 can not be released, so that the fixing bolt 40 is rotated The locking bolt 40 and the rotary member 30 are separated upward and the locking member 21 whose connection is released is directly lowered downward as it is separated from the bolt hole 25 of the locking member 21. [

The detent projection 24 is caught by the upper side of the through hole 15 and stops moving without stopping while the locking member 21 is dropped downward. At this time, the toothed engaging projection 22 of the locking member 21 rotates in the circumferential direction Since the state of being separated from the teeth 13 is released, the manhole cover 10 can be opened easily.

After the operation of the manhole cover 10 is completed by simply releasing the operation of the manhole lock device 20 when the operation of the manhole lock device 20 is disabled, the rotary member 30 and the lock piece 21 are engaged with the fixing bolt 40, So that it can be easily released when the locked state is disabled and re-maintained the locked state.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

The present invention can be installed in a manhole cover to prevent the separation of the manhole cover, and it is possible to open the manhole cover and to open the manhole cover by releasing foreign matter or freezing in winter when it is impossible to lock So that the locking device can be conveniently combined to maintain the locked state after the operation is completed.

10: Manhole cover 11: Lid frame
12: assembly jaw 13: circumferential saw teeth
14: installation groove 15: through hole
16: guide groove 17: spring mounting base
20: Manhole locking device 21: Locking member
22: tooth engaging projection 23: lower mounting ring
24: detachment protrusion 25: bolt hole
26: spring 30: rotating member
31: Bolt head groove 32: Release groove
33: bolt through hole 34: member connecting groove
35: spring mounting projection 36: projection engagement groove
40: Fixing bolt

Claims (6)

(11) formed with an assembly step (12) on an inner diameter side and a circumferential saw tooth (13) formed on an inner side of an inner diameter thereof and an installation groove (14) of a manhole cover (10) Providing a lock upon engagement and disengagement with the teeth (13);
A rotary member 30 located in the installation groove 14 and having a bolt through hole 33 formed at the center thereof and forming a bolt head groove 31 and a release groove 32 in the upper center; A bolt hole 25 is formed on the upper side of the through hole 15 formed in the lower center of the mounting groove 14 and a lower mounting ring 23 is formed, A lock member (21) having a projection (22) formed at the tip end thereof; A fixing bolt 40 which is positioned in the bolt head groove 31 of the rotary member 30 and penetrates the bolt through hole 33 and is connected to the bolt hole 25 formed on the upper side of the lock member 21; And a spring (26) which is positioned below the rotary member (30) and maintains the locked state of the manhole cover (10) in the installation groove (14)
The manhole cover 10 is formed with guide grooves 16 on both sides of the through holes 15 provided on the lower side of the mounting grooves 14 to engage with the detachment protrusions 24, And a spring mounting base (17) is formed on an outer periphery of the locking hole (17).
delete (11) formed with an assembly step (12) on an inner diameter side and a circumferential saw tooth (13) formed on an inner side of an inner diameter thereof and an installation groove (14) of a manhole cover (10) Providing a lock upon engagement and disengagement with the teeth (13);
A rotary member 30 located in the installation groove 14 and having a bolt through hole 33 formed at the center thereof and forming a bolt head groove 31 and a release groove 32 in the upper center; A bolt hole 25 is formed on the upper side of the through hole 15 formed in the lower center of the mounting groove 14 and a lower mounting ring 23 is formed, A lock member (21) having a projection (22) formed at the tip end thereof; A fixing bolt 40 which is positioned in the bolt head groove 31 of the rotary member 30 and penetrates the bolt through hole 33 and is connected to the bolt hole 25 formed on the upper side of the lock member 21; And a spring (26) which is positioned below the rotary member (30) and maintains the locked state of the manhole cover (10) in the installation groove (14)
The locking member 21 is formed in a "b" shape, and a detachment protrusion 24 is protruded from the upper end of the through hole 15 so as not to separate from the lower side where the bolt hole 25 is formed, Characterized in that a lower side mounting ring (23) positioned below the lower side wall (15) is formed and a tooth coupling projection (22) engaging with the circumferential tooth (13) protrudes upwardly. lock.
(11) formed with an assembly step (12) on an inner diameter side and a circumferential saw tooth (13) formed on an inner side of an inner diameter thereof and an installation groove (14) of a manhole cover (10) Providing a lock upon engagement and disengagement with the teeth (13);
A rotary member 30 located in the installation groove 14 and having a bolt through hole 33 formed at the center thereof and forming a bolt head groove 31 and a release groove 32 in the upper center; A bolt hole 25 is formed on the upper side of the through hole 15 formed in the lower center of the mounting groove 14 and a lower mounting ring 23 is formed, A lock member (21) having a projection (22) formed at the tip end thereof; A fixing bolt 40 which is positioned in the bolt head groove 31 of the rotary member 30 and penetrates the bolt through hole 33 and is connected to the bolt hole 25 formed on the upper side of the lock member 21; And a spring (26) which is positioned below the rotary member (30) and maintains the locked state of the manhole cover (10) in the installation groove (14)
The rotary member 30 is located in the installation groove 14 and is formed with a clearance groove 32 on both sides of the bolt head groove 31. The bolt head groove 31 is formed with a bolt- A member connecting groove 34 is formed on the lower side of the bolt through hole 33 to engage the upper side of the lock member 21 and a spring is provided on the outer circumference of the member connecting groove 34 And a protrusion (35) is formed on the upper surface of the upper surface of the manhole.
(11) formed with an assembly step (12) on an inner diameter side and a circumferential saw tooth (13) formed on an inner side of an inner diameter thereof and an installation groove (14) of a manhole cover (10) Providing a lock upon engagement and disengagement with the teeth (13);
A rotary member 30 located in the installation groove 14 and having a bolt through hole 33 formed at the center thereof and forming a bolt head groove 31 and a release groove 32 in the upper center; A bolt hole 25 is formed on the upper side of the through hole 15 formed in the lower center of the mounting groove 14 and a lower mounting ring 23 is formed, A lock member (21) having a projection (22) formed at the tip end thereof; A fixing bolt 40 which is positioned in the bolt head groove 31 of the rotary member 30 and penetrates the bolt through hole 33 and is connected to the bolt hole 25 formed on the upper side of the lock member 21; And a spring (26) which is positioned below the rotary member (30) and maintains the locked state of the manhole cover (10) in the installation groove (14)
Wherein the rotary member is further provided with a projection engaging groove for engaging with the detachment protrusion on the outer side of the circular member connecting groove. Lock for.
(11) formed with an assembly step (12) on an inner diameter side and a circumferential saw tooth (13) formed on an inner side of an inner diameter thereof and an installation groove (14) of a manhole cover (10) Providing a lock upon engagement and disengagement with the teeth (13);
A rotary member 30 located in the installation groove 14 and having a bolt through hole 33 formed at the center thereof and forming a bolt head groove 31 and a release groove 32 in the upper center; A bolt hole 25 is formed on the upper side of the through hole 15 formed in the lower center of the mounting groove 14 and a lower mounting ring 23 is formed, A lock member (21) having a projection (22) formed at the tip end thereof; A fixing bolt 40 which is positioned in the bolt head groove 31 of the rotary member 30 and penetrates the bolt through hole 33 and is connected to the bolt hole 25 formed on the upper side of the lock member 21; And a spring (26) which is positioned below the rotary member (30) and maintains the locked state of the manhole cover (10) in the installation groove (14)
The mounting hole 14 of the manhole cover 10 further has a spring mounting groove 18 in which a spring 26 is located and a spring mount 17 is formed below the mounting groove 14 Wherein the locking device is detachably attached to the main body.

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