KR20110005496A

KR20110005496A - Antitheft manhole cover

Info

Publication number: KR20110005496A
Application number: KR1020090063090A
Authority: KR
Inventors: 공병철; 이민호
Original assignee: 공병철; 이민호
Priority date: 2009-07-10
Filing date: 2009-07-10
Publication date: 2011-01-18

Abstract

The present invention relates to a manhole cover anti-theft device, and to a manhole cover anti-theft device to prevent the manhole cover from being blown off by gas while connecting the chain between the manhole support and the manhole cover to prevent the manhole cover from being stolen.

In the structure of the present invention in connecting the manhole support and the manhole cover with a chain, one end of the chain is connected to the manhole cover by the dismantling prevention means, the other end of the chain is connected to the manhole support by the ring bolt, the ring bolt The nut has a structure in which the nut is fastened to the bolt portion exposed to the other end through the manhole support, the dismantling prevention means when forming the manhole cover, the ring is exposed to the bottom of the manhole cover and the screw portion is buried in the manhole cover body and An integrated ring bolt; A 'U'-type connecting ring having through-holes positioned at both sides of the ring bolt in a state in which the chain is fitted; Consists of the anti-dissolution bolt penetrating the through-hole of the ring and the connecting ring of the ring bolt and the nut fastened thereto; The dismantling prevention bolt has a structure in which a band-shaped groove is formed around the distal end thereof.

According to the present invention having such a configuration, when the impact is applied to the distal edge of the dismantling prevention bolt, the corner portion is deformed together with the thread by the groove, so that the nut is not rotated in this section and thus cannot be dismantled. In addition, when the jig hitting the open groove of the bolt is easily opened to both sides there is an effect that the deformation operation is more easily made.

Manhole, lid, pedestal, bolt, fixing, screw, nut, groove, pin

Description

Anti-theft device for manhole cover {Antitheft manhole cover}

The present invention relates to a manhole cover anti-theft device, and more particularly, by connecting the chain between the manhole support and the manhole cover to prevent the manhole cover from being stolen while preventing the manhole cover theft by gas pressure in the pipeline Relates to a device.

In general, manholes are holes made by humans to inspect, connect, repair, or clean underground water pipes, sewer pipes, wiring, underground communication cables, and pavement. It is installed at the point where the direction changes and the middle point of the long pipe.

The manhole is a concrete body buried in the ground to form a passage for people to enter, a manhole support is installed on the top of the body, the manhole support is provided with a manhole cover to prevent the vehicle or pedestrians fall into the manhole.

The manhole support and the manhole cover has a problem in that an accident is generated when the heavy chain vehicle passes such that the impact is applied and is separated from the manhole support. In addition, the manhole cover is made of metal to withstand the passing of vehicles, etc., which has been the target of theft when the economy is stagnant and the value of scrap metal or the value of metal atoms rises, resulting in much material damage. In addition, if the manhole cover is lost due to theft, a fatal secondary accident, such as a wheel of the vehicle as well as a pedestrian falling into the open manhole, may be caused.

Recently, in order to solve this problem, a manhole cover locking device is integrated, which is integrated by fastening a bolt between the manhole cover and the manhole support, or forming a locking piece corresponding to each other around the manhole support and the manhole cover.

As described above, the manhole cover with the manhole cover lock device is fixed to the manhole cover from the manhole support by bolts and hooks, so that the manhole cover is not detached even when an impact is applied by driving a vehicle, thereby preventing a safety accident.

In addition, there is a chain connected to the manhole support and the manhole cover to prevent theft.

However, in order to connect the manhole support and the manhole cover with a chain, a ring is formed in the manhole support and the manhole cover, and both ends of the chain are opened and connected to each ring at the site, and then the both ends of the chain are welded to connect the chain. It also prevents theft from being lost by theft.

As described above, the conventional manhole cover locking device using bolts has an effect that the manhole cover is not detached even from an external impact, but it is not possible to prevent theft because the bolt can be easily disassembled using an extension such as a spanner. In particular, spanners such as spanners are common enough to be owned by all households, so anyone can release the bolts if they want to.

And because the locking device using the locking piece is opened by the method of rotating the manhole cover, there is still a possibility of theft and there is a problem that there is a risk of loss.

In addition, the conventional anti-lost structure connecting the manhole support and the manhole cover by a chain (chain), there is a need for improvement in the inconvenience of the construction to connect the chain in the field.

The present invention has been made to solve the conventional problems, the connection between the manhole support and the manhole cover using a chain, but the release of the chain as it is impossible to loosen the fastened nut by plastic deformation of the bolt fixing the chain The purpose is to provide a manhole cover anti-theft device to prevent the loss of the manhole cover is impossible.

Manhole cover anti-theft device according to the present invention for achieving the above object,

In the structure to prevent the loss by connecting the manhole cover to the manhole support,

A chain for fixing the support ring bolt to the manhole support by connecting the support ring bolts to form one connection at one end;

A cover ring bolt configured to be integrally formed with the manhole cover by embedding the shaft so that the ring is exposed to the bottom surface of the manhole cover when the manhole cover is cast and is composed of a ring and a shaft part;

A dismantling prevention bolt having a head larger than the end of the chain and the inner diameter of the ring, and having a groove formed around the distal end of the shaft unit and inserted into the inner diameter of the end of the chain and the ring;

Consists of a nut having a size of the head and fastened to the disassembly prevention bolt to pass through the groove;

After the nut is fastened, the deformed screw thread formed around the recess of the distal end of the dismantling prevention bolt is impact-deformed so that the nut is not dismantled from the dismantling prevention bolt.

On the other hand, the present invention, in the structure to prevent the loss by connecting the manhole cover to the manhole support,

Forming a pin insertion hole in the nut to fasten the nut to the dismantling prevention bolt, and puts a pin in the pin insertion hole is characterized in that the pin end is located in the groove to prevent the nut from being separated.

In addition, a pin housing hole is formed in the recess of the dismantling prevention bolt so that when the nut needs to be dismantled, the pin storing hole and the pin inserting hole are matched to insert the pin into the pin storing hole by hitting to allow the nut to be disassembled. It features.

When the manhole cover anti-theft device according to the present invention is applied to the end edge of the dismantling prevention bolt, the corner portion is deformed together with the thread by the groove, so the nut is not screwed in this section and thus can not be dismantled. It works.

In addition, when hitting the pointed extension to the opening groove of the dismantling prevention bolt is easily opened to both sides, so the disassembly of the nut is more difficult, there is an advantage that can be surely prevented the loss due to theft.

And if the pin is inserted into the pin insertion hole formed in the nut, the inserted pin is caught in the groove so that the nut can be prevented from disassembling without the plastic deformation of the dismantling prevention bolt. If the pin insertion hole and the pin receiving hole are coincident with the rotation, the pin is inserted into the pin receiving hole by the blow, and the nut is freed and can be separated. There is this.

In addition, the present invention has the advantage that can be connected to the chain so that the manhole stand and manhole cover quick and simple dismantling in the field.

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

1 is a cross-sectional view showing the structure of a manhole cover anti-theft device according to a first embodiment of the present invention, Figure 2 is an enlarged cross-sectional view showing the main portion showing the dismantling prevention means according to the first embodiment of the present invention, Figure 3 Is a state diagram showing the dismantling prevention means according to the first embodiment of the present invention.

As shown in these drawings, the manhole cover anti-theft device according to the present invention is connected between the manhole support 10 and the manhole cover 20 with a chain 30, one end of the chain 30 is dismantling prevention means 40 is connected to the manhole cover 20, and the other end of the chain 30 is connected to the manhole support 20 by the support ring bolt (31).

Here, the dismantling preventing means 40 is composed of a cap ring bolt 41, a dismantling bolt 42, a nut 43, and a connecting ring 44 integrated into the manhole cover 20.

The cap ring bolt 41 is formed with a ring (41a) is inserted into the disassembly prevention bolt 42 at one end and the other end is formed integrally with the shaft formed with a thread (41b), ring 41a instead of a conventional bolt head ) Is formed.

The cap ring bolt 41 is manufactured in a state where the screw thread 41b is buried in the body of the manhole cover 20 when the manhole cover 20 is formed, and is integrated with the manhole cover 20. On the other hand, the portion of the ring 41a is exposed to the bottom of the manhole cover 20.

The connecting ring 44 connected to the cap ring bolt 41 is formed in a 'U' shape, and through holes 44 'are formed at both ends of the opening. The distance between both axes of the connecting ring 44 has a width into which the ring 41a and the chain 30 of the cap ring bolt 41 can be inserted.

The connecting ring 44 having such a structure is a state in which the chain 30 is fitted from one end thereof, and the through hole 44 'is positioned at both sides of the ring 41a of the lid ring bolt 41, that is, the lid ring. When the ring 41a of the bolt 41 and the through hole 44 'of the connecting ring 44 are positioned on the same axis, the connection is completed by passing through the dismantling prevention bolt 42 and fastening it with the nut 43. do.

Here, the dismantling prevention bolt 42 has a band-shaped groove 42a formed around the distal end thereof. These grooves 42a are intended to be easily deformed by the grooves 42a when striking the edge of the distal end. That is, when hitting the edge of the distal end extending, the portion hitting from the groove 42a portion is deformed and crushed. At this time, the thread formed around it is also deformed so that the nut 43 is not rotated in this section. That is, the rotation of the nut 43 is prevented from loosening of the nut 43, and thus, the nut 43 may not be separated, so that the manhole cover 20 connected to the chain 30 is not lost.

On the other hand, the chain 30 connected to the manhole support 10 is connected by the support ring bolt 31, the support ring bolt 31 is the same shape as the lid ring bolt 41 of the dismantling prevention means (40) Has The support ring bolt 31 is connected by completing the connection of the nut 32 through the side wall of the manhole support 10 and protruding to the other side. In order to remove the fixed support ring bolt 31 as described above, the nut 32 must be loosened. If the manhole is completed, the manhole support 10 is buried in the ground and the nut 32 In addition, since it is buried in the ground and asphalt, walkway blocks, etc. are constructed around it, it is virtually impossible to separate the nut 32 unless it is dug. And even if you dig the land, it takes a long time to be easily spotted.

The manhole cover anti-theft structure according to the present invention made of such a structure is a structure that can not be stolen because it is not possible to separate the chain 30 and the connection portion once installed. In addition, when the manhole cover 20 is opened due to the instantaneous release of pressure inside the gas explosion or other situations therein to prevent the manhole cover 20 from flying away.

Figure 4 is an enlarged cross-sectional view showing the main portion disassembly prevention means according to the second embodiment of the present invention, as shown in the figure cover part disassembly prevention bolt 42 'with the screw portion protrudes to the bottom surface of the manhole cover 20 And a nut 43 'which is fastened to the lid embedding prevention bolt 42' and prevents the chain 30 inserted into the lid embedding preventing bolt 42 'from being detached.

The lid embedding prevention bolt 42 'has a structure in which a bolt hole 21 is formed at the center of the manhole cover 20 and the chain 30 and the two nuts 42 are fastened to the screw portion protruding downward from the upper part. Has One of the nuts is a fixing nut 43 'which allows the lid embedding prevention bolt 42' to be firmly fixed to the manhole cover 20, and another one of the nuts to prevent the chain 30 from being detached. Nut 43 '. The chain 30 is thus located and connected between two nuts 43 '. And it is natural that the hole of the chain 30 is formed to a size that cannot penetrate the nut 43 '.

Here, the lid embedding prevention bolt 42 'may be fixedly installed through the manhole cover 20, as shown in the drawing, but the bolt head portion is a manhole cover like the cap ring bolt 41 of the first embodiment. It can be integrated in the state buried in (20).

The groove 42a as described in the first embodiment is also formed at the distal end of the lid embedding prevention bolt 42 '. Therefore, the nut 43 'is prevented from being loosened by deformation of the end portion of the lid embedding prevention bolt 42' by fastening the nut 43 'by tightening the nut 43', thereby preventing theft of the manhole cover 20.

5 is a cross-sectional view showing the structure of a manhole cover anti-theft device according to a third embodiment of the present invention, as shown in the figure, a manhole support 10 having a support ring 31 to which the chain 30 is connected. Installed in two or more places and the end of each chain 30 is connected to all of the dismantling prevention means (40).

When a plurality of chains 30 are connected as described above, even more stable coupling is made, and the manhole cover 20 is separated by the chain 30 even though the manhole cover 20 is opened and detached therein.

Figure 6 is a cross-sectional view showing the structure of the manhole cover anti-theft device according to a fourth embodiment of the present invention, the disassembly prevention means 40 is installed at intervals on both sides of the bottom surface of the manhole cover 20, the supporting ring Bolts 31 are installed on both sides of the manhole support 10 has a structure in which the chains 30 are respectively connected.

The manhole cover anti-theft device of the present invention having such a structure is because the chain 30 catches both sides of the manhole cover 20 even if the manhole cover 20 is detached from the manhole support 10 due to the compression explosion inside. The fluctuation of the manhole cover 20 is less, so that the safety accident is prevented by being detached without big bounce.

7A and 7B are exemplary views showing the bolt structure of the dismantling preventing means according to the fifth embodiment of the present invention. As shown in the drawing, the dismantling preventing bolt 42 of the dismantling preventing means 40 Opening groove 42b is formed by the blow.

The opening groove 42b is formed in a triangular shape or an elongated rectangular shape in which the inlet is wide and gradually narrowed toward the inside. The depth of the opening groove 42b is formed up to the vicinity of the groove 42a. As the depth of the opening groove 42b is deeper, deformation is easier, but durability is weak, and thus the depth of the opening groove 42b is determined by strength calculation. This is preferred.

When the blow is applied in the state in which the tip such as a chisel or chisel is placed in the opening groove 42b, the opening groove 42b is opened by the extension, and the diameter of the dismantling prevention bolt 42 shaft is partially expanded and the thread In addition, deformation occurs and the rotation of the nut 43 is impossible. As a result, the opening groove 42b is formed together with the recess 42a so that plastic deformation occurs more easily.

8A to 8D are exemplary views showing the bolt structure of the dismantling preventing means according to the sixth embodiment of the present invention.

As shown in these figures, the bolt structure of the dismantling prevention means according to the sixth embodiment of the present invention is smaller than the groove 42a of the dismantling prevention bolt 42 to the nut 43 fastened to the dismantling prevention bolt 42. The pin insertion hole 43 'is formed to penetrate in the direction intersecting the shaft, so that the pin P is inserted, and the dismantling prevention bolt 42 is a pin receiving hole in the direction of the axis crossing the groove 42a. 42c is formed so that the pin P inserted from the nut 43 can be accommodated.

The pin insertion hole 43 ′ is formed to have a diameter smaller than the width of the groove 42a of the dismantling prevention bolt 42 in the direction perpendicular to the axial direction of the nut 43. And the pin (P) is formed in a slightly smaller diameter than the pin insertion hole (43 ') is to be combined by the interference fit. Of course, chamfers or rounds are formed at both ends of the pin (P) to facilitate the insertion of the pin (P).

In addition, in the recess 42a of the dismantling prevention bolt 42, a pin receiving hole 42c having a diameter smaller than that of the pin insertion hole 43 'is formed, and the pin P fitted to the nut 43 is recessed 42a. It can be inserted into the pin receiving hole (42c).

When the pin P is forcibly inserted into the pin insertion hole 43 'of the nut 43, the pin P penetrates through the pin insertion hole 43' as shown in FIG. 8B. Protrudes to, the protruding pin (P) is fitted into the groove (42a) of the dismantling prevention bolt (42). In this state, the nut 43 integrated with the pin P cannot move in the axial direction as the pin P is caught by the groove 42a, thereby preventing loosening of the nut 43.

Then, as shown in FIG. 8C, the nut 43 is rotated to position the pin insertion hole 43 ′ and the pin receiving hole 42 c in the same axis line. The pin P is fully inserted into the ball 42c to separate the pin P from the nut 43, so that the nut 43 is rotated without interference of the pin P and eventually separated. This dismantling prevention bolt 42 has a feature that can be used to assemble the nut 43 again because there is no deformation of the screw portion.

9A to 9C are exemplary views showing the bolt structure of the dismantling preventing means according to the seventh embodiment of the present invention, and as shown in these drawings, a locking ring (a) in the groove 42a of the dismantling preventing bolt 42. 50) is inserted.

The locking ring 50 has an inner diameter larger than the outer diameter of the thread so that it can be fitted to the dismantling prevention bolt (42). When the lock ring 50 is inserted into the groove 42a, the two sides or the upper and lower portions of the lock ring 50 are picked up to be secured to the groove 42a by the extension to be fixed to the groove 42a to loosen the nut 43. This is avoided.

In addition, when the plastic ring is deformed by hitting the distal edge of the bolt 42 into which the lock ring 50 is inserted, the locking ring 50 is also plastically deformed to further prevent loosening of the nut 43.

1 is a cross-sectional view showing the structure of a manhole cover anti-theft device according to a first embodiment of the present invention.

Figure 2 is an enlarged cross-sectional view showing the main portion showing the dismantling prevention means according to the first embodiment of the present invention.

Figure 3 is a state diagram showing the dismantling prevention means according to the first embodiment of the present invention.

Figure 4 is an enlarged cross-sectional view showing the main portion showing the dismantling prevention means according to a second embodiment of the present invention.

5 is a cross-sectional view showing the structure of a manhole cover anti-theft device according to a third embodiment of the present invention.

Figure 6 is a sectional view showing the structure of a manhole cover anti-theft device according to a fourth embodiment of the present invention.

Figure 7a, 7b is an illustration showing the bolt structure of the dismantling prevention means according to a fifth embodiment of the present invention.

9a to 9c are exemplary views showing the bolt structure of the dismantling preventing means according to the seventh embodiment of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10-manhole support 20-manhole cover

30-Chain 31, 41-Base, Cap Bolt

32, 43, 43 '-Nut 40-Dismantling prevention means

41a-hook 41b-threaded section

42, 42 '-Disassembly prevention bolt, lid embedded prevention bolt

42a-groove 42b-gaping groove

42c-pinhole 50-lock ring

Claims

In the structure to prevent the loss by connecting the manhole cover 20 to the manhole support 10,

A chain (30) for fixing the support ring bolt (31) to the manhole support (10) by connecting the support ring bolts (31) to form one connector at one end;

Consists of a ring 41a and a shaft portion 41b and integrally formed with the manhole cover 20 by embedding the shaft portion 41b so that the ring 41a is exposed to the bottom surface of the manhole cover 20 when casting the manhole cover 20. Lid ring bolt 41 and being;

An inner diameter of the distal end of the chain 30 and the inner diameter of the ring 41a is formed by forming a groove 42a around the distal end of the shaft portion integral with the distal end of the chain 30 and the inner diameter of the ring 41a. Dismantling prevention bolt 42 inserted through the;

A nut having a size of the head and fastened to the dismantling prevention bolt 42 to pass through the groove 42a;

Manhole cover, characterized in that the nut is not disassembled from the disassembly prevention bolt 42 by hitting and deforming the deformed screw thread formed on the circumference after the groove 42a of the distal end of the dismantling prevention bolt 42 after the fastening of the nut Anti-theft device.

3. The manhole cover anti-theft device according to claim 1 or 2, wherein an opening groove (42b) is formed on the end surface of the dismantling prevention bolt (42).

The method of claim 1, wherein the locking ring 50 having a diameter larger than the shaft portion of the dismantling prevention bolt 42 is inserted into the groove 42a to be positioned in the groove 42a to be positioned on both sides or Manhole cover anti-theft device, characterized in that one side is crushed to prevent disassembly of the nut.

It has a distal end of the chain 30 and a head larger than the inner diameter of the ring 41a, and a groove 42a is formed around the distal end of the shaft portion integral therewith to penetrate the distal end and the ring 41a of the chain 30. Insertion prevention bolt 42 is inserted;

The nut has a size of the head and is fastened to the dismantling prevention bolt 42 so as to pass through the groove 42a, and comprises a nut having a pin insertion hole 43 'and a pin P pressed into the side. ;

The nut is dismantled from the dismantling prevention bolt 42 by hitting the dismantling preventing bolt 42 after the fastening of the nut and deforming the deformed screw thread formed around the groove 42a of the distal end of the dismantling preventing bolt 42. Anti-theft device for manhole cover, characterized in that.

5. The nut 43 according to claim 4, wherein a pin receiving hole 42c is formed in the recess 42a of the dismantling prevention bolt 42 in a direction intersecting with the shaft portion. After matching the pin insertion hole (43 ') of the pin (P) by hitting the pin receiving hole (42c) is characterized in that the nut 43 can be dismantled from the disassembly prevention bolt 42 Manhole cover anti-theft device.

The terminal of the chain 30 is the "U 'type | mold connecting ring 44 which provided the through-hole 44' in both ends,

After the ring 41a of the manhole cover 20 is positioned between the through holes 44 'of the' U'-type link ring 44, the ring 41a and the 'U'-type link ring 44 Align the through hole 44 ', insert the dismantling prevention bolt 42 through it, fasten the nut to pass through the groove 42a, and deform the thread of the dismantling prevention bolt 42 to dismantle the nut. Manhole cover anti-theft device, characterized in that not to be disassembled from the prevention bolt (42).

According to any one of claims 1 to 5, wherein the support chain bolt 31 is connected to the chain hole 30 is provided on both sides of the manhole support 10 to connect the end of the cap ring bolt 41 The manhole cover anti-theft device, characterized in that.

The method according to claim 7, wherein the cap ring bolt 41 is installed at intervals on both sides of the bottom surface of the manhole cover 20, so that the chains 30 installed on both sides of the manhole support 10 are connected to each other. Manhole cover anti-theft device.

In the structure to prevent the loss by connecting the manhole cover 20 to the manhole support,

The end portion is embedded in the manhole cover 20 when the casting is installed so as to be exposed to the lower portion of the manhole cover (20), the lid embedding prevention bolt (42 ') formed with grooves (42a) around the exposed end portion;

A nut 43 'fastened to the lid embedding prevention bolt 42' so as to pass through the groove 42a after the end portion of the chain 30 is fitted into the lid embedding prevention bolt 42 '; Manhole cover anti-theft device, characterized in that configured.