KR101884362B1 - Rockbolt having taper type insert part - Google Patents

Rockbolt having taper type insert part Download PDF

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Publication number
KR101884362B1
KR101884362B1 KR1020140030251A KR20140030251A KR101884362B1 KR 101884362 B1 KR101884362 B1 KR 101884362B1 KR 1020140030251 A KR1020140030251 A KR 1020140030251A KR 20140030251 A KR20140030251 A KR 20140030251A KR 101884362 B1 KR101884362 B1 KR 101884362B1
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KR
South Korea
Prior art keywords
hollow body
rear end
hollow
fluid
tapered insertion
Prior art date
Application number
KR1020140030251A
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Korean (ko)
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KR20150107388A (en
Inventor
유진오
손성곤
김진형
Original Assignee
코오롱글로벌 주식회사
주식회사 티에스테크노
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Application filed by 코오롱글로벌 주식회사, 주식회사 티에스테크노 filed Critical 코오롱글로벌 주식회사
Priority to KR1020140030251A priority Critical patent/KR101884362B1/en
Priority to PCT/KR2015/001523 priority patent/WO2015137634A1/en
Publication of KR20150107388A publication Critical patent/KR20150107388A/en
Application granted granted Critical
Publication of KR101884362B1 publication Critical patent/KR101884362B1/en

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Earth Drilling (AREA)

Abstract

The present invention relates to a locking bolt having a tapered insertion portion, in which a hollow is formed in such a manner that the fluid can be introduced through a front end which is an inlet side to which fluid is introduced, and a portion is recessed along the circumferential direction A hollow body in which a hollow is formed and a portion pressed by the fluid introduced into the hollow is expanded inside the hollow; A tip cap fixedly coupled to a distal end of the hollow body so as to connect a spraying portion for spraying the fluid; A rear end joining portion for joining a rear end of the hollow body to the outer periphery of the hollow body so as to prevent the fluid introduced into the hollow of the hollow body from flowing out of the hollow body through the injection portion; And a tapered insertion portion formed at a rear end of the hollow body so that the hollow body is gradually reduced in diameter toward the rear end along the longitudinal direction of the hollow body so that the hollow body can be easily drawn in and out of the hollow hole The lock bolt can be easily inserted into and out of the perforation to be installed, and at the same time, the rear end of the hollow body of the lock bolt is directly closed by welding, thereby reducing the time and cost required for manufacturing the lock bolt have.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a lock bolt having a tapered insertion portion,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction civil engineering field, and more particularly, to a rock bolt having a tapered insertion portion for facilitating insertion of a rock bolt at a desired position.

1 is a perspective view showing a structure of a conventional rock bolt.

As shown in FIG. 1, a conventional fluid supply pipe 10 for a rock bolt construction is connected to a main body (not shown) having one end forming a fluid such as air or water at a high pressure and the other end connected to the lock bolt 20 side And is connected to the end portion of the lock bolt 20 so as to inject fluid such as air or water formed at a high pressure.

The fluid supply pipe 10 for constructing a rock bolt is formed in a hollow cylindrical shape having a predetermined diameter to form a passage through which a fluid such as air and water can pass.

The lock bolt 20 has a hollow body 21 that is expanded by a fluid supplied to the hollow inside of the lock bolt 20 in a state where the lock bolt 20 is pushed in a partially recessed shape along the circumferential direction thereof and a passage through which the fluid passes is formed A cap 22 for leading end connected to the end of the hollow body 21 and a fluid supply tube 10 for capping the bolt and a cap 22 for the tip so that the fluid can be injected toward the hollow body 21 And a coupling 23 for coupling.

The rear end of the hollow body 21 prevents the fluid introduced into the hollow body 21 from flowing out to the outside of the hollow body 21 to increase the pressure inside the hollow body 21, And a rear end cap 24 for allowing the locking bolt 21 to be expanded at a desired position.

The rear end cap 24 is fixedly coupled to the rear end of the hollow body 21 by welding or the like so that the rear end of the hollow body 21 can be closed.

When a fluid such as air or water is formed at a high pressure in a main body (not shown) and then the fluid is introduced into the lock bolt 20 through the fluid supply pipe 10 for applying a lock bolt, 24 prevents the fluid introduced into the hollow body 21 from flowing out to increase the pressure inside the hollow body 21 so that the hollow body 21 is instantaneously expanded and the rock bolt is fixed to the inside of the ground, (20) is completed.

In such a conventional rock bolt, a separate rear end cap 24 is inserted into the hollow body 21 so that fluid flowing into the hollow body 21 does not flow out of the hollow body 21, It is necessary to perform the work of fixing by a method such as welding, so that it takes much time to manufacture the lock bolt.

In order to change the mounting position after the lock bolt is inserted into the perforation hole to be installed, gravel or sand existing in the perforation hole is gathered due to the stepped surface of the rear end of the cap 24 when the perforation hole is drawn out It is difficult to pull out the lock bolt due to the gap between the rear end of the cap 24 and the inner surface of the perforation hole.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a lock bolt which can be easily inserted into and out of a perforation hole to which a lock bolt is to be installed, It is an object of the present invention to provide a locking bolt having a tapered insertion portion that can reduce the time and cost required for manufacturing a bolt.

In order to achieve the above object, the present invention provides a locking bolt having a tapered insertion portion, wherein a hollow is formed in the locking bolt so that the fluid can be introduced through the tip of the inlet, A hollow body which is pressed in a recessed shape to form a void, the portion being pressed by the fluid introduced into the hollow is expanded inside the perforation hole; A tip cap fixedly coupled to a distal end of the hollow body so as to connect a spraying portion for spraying the fluid; A rear end joining portion for joining a rear end of the hollow body to the outer periphery of the hollow body so as to prevent the fluid introduced into the hollow of the hollow body from flowing out of the hollow body through the injection portion; And a tapered insertion portion formed at a rear end of the hollow body so that the hollow body is gradually reduced in diameter toward the rear end along the longitudinal direction of the hollow body so that the hollow body can be easily drawn in and out of the hollowed hole .

Here, the tapered insertion portion is integrally formed with the hollow body by being formed so that the diameter of the hollow body itself gradually decreases toward the rear end along the longitudinal direction of the hollow body, and the rear end joint portion is formed integrally with the tapered- It can be provided at the rear end of the insertion portion.

The tapered insertion portion has an insertion member formed such that its distal end is formed to have the same diameter as the diameter of the rear end of the hollow body and joined to the rear end of the hollow body and gradually reduced in diameter toward the rear end along the longitudinal direction .

In addition, the insertion member may be welded to the rear end of the hollow body by an adhesive or an adhesive.

In addition, the tapered insertion portion is formed with a diameter equal to the diameter of the rear end of the hollow body and has a fastening protrusion to be fastened to the hollow, and the diameter of the wedge is gradually reduced toward the rear end along the length direction. Member.

The fastening protrusion can be forcedly press-fitted into the lumen to be fastened.

The rear end joint may be formed of a welded material that is filled in the rear end of the hollow body so as to be welded to the rear end of the hollow body so as to be joined to the rear end of the hollow body.

As described above, the lock bolt having the tapered insertion portion according to the present invention can be easily inserted into and out of the perforation hole to which the lock bolt is to be installed, and the rear end of the hollow body of the lock bolt can be directly It is possible to reduce the time and cost required for manufacturing the lock bolt.

1 is a perspective view showing the structure of a conventional rock bolt,
2 is a perspective view illustrating the structure of a lock bolt having a tapered insert according to a first embodiment of the present invention,
3 is an exploded perspective view showing a structure of a lock bolt having a tapered insert according to a second embodiment of the present invention,
4 is an exploded perspective view showing a structure of a lock bolt having a tapered insert according to a third embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a locking bolt having a tapered insertion portion according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view showing a structure of a lock bolt having a tapered insertion portion according to a first embodiment of the present invention. FIG. 3 is a cross-sectional view of a lock bolt having a tapered insertion portion according to a second embodiment of the present invention. FIG. 4 is an exploded perspective view showing a structure of a lock bolt having a tapered insert according to a third embodiment of the present invention. FIG.

As shown in these drawings, the lock bolt having the tapered insertion portion according to the present invention has a hollow 110 formed therein so that the fluid can be introduced through the tip, which is the inlet side of the fluid, A hollow body 100 in which a portion of the hollow body 110 is pushed in the shape of a recessed portion to form a void 101 and a portion of the hollow 110 which is pushed by the fluid is expanded inside the hollow. A tip cap 200 fixedly coupled to a distal end of the hollow body 100 so as to connect a spraying unit 210 for spraying the fluid; The hollow body 100 may be configured to prevent the fluid flowing into the hollow body 110 of the hollow body 100 from flowing out of the hollow body 100 through the injection part 210. [ A rear end joining part 300 for joining the rear end to be closed; The hollow body 100 may be formed to be gradually reduced in diameter toward the rear end along the longitudinal direction of the hollow body 100 so that the hollow body 100 can be easily drawn into and drawn out of the hollow body 100, And a tapered insertion portion 400 provided at the rear end.

First, the injection part 210, which is a passage for injecting fluid into the hollow 110 formed inside the hollow body 100 when the lock bolt is installed, is constructed as follows.

One end of the jetting unit 210 is connected to a fluid receiving portion (not shown) in which the fluid to be supplied is accommodated and the other end is connected to the cap 200 provided at the tip of the hollow body 100 of the lock bolt And the fluid is injected into the inside of the lock bolt when the lock bolt is installed.

For this purpose, the jetting unit 210 is formed into a tubular shape having hollows therein so as to inject the compressed high-pressure air to the rock bolt side.

The hollow body 100, which is the body of the lock bolt, is formed with a hollow 110 as a space through which fluid can flow, and a part of the hollow body 100 is pressed inwardly .

The length of the rock bolt is preferably different depending on the depth of the ground on which the rock bolt is provided and the degree of friction between the rock bolt and the required ground.

In this hollow body 100, the recessed portion is expanded outward by the pressure formed by the fluid flowing into the hollow 110, and the outer surface of the hollow body 100 is in surface contact with the inner wall surface of the ground.

The tip cap 200 is fixedly coupled to the distal end of the hollow body 100 formed with the hollow 110 so that the fluid supply tube is connected to the hollow body 100.

The tip cap 200 is joined to the distal end of the hollow body 100 by welding or the like and communicates with the hollow body 100 to connect the hollow body 100 with the fluid through the fluid supply pipe. 110).

The rear end joining portion 300 is provided at the rear end of the hollow body 100 so that the hollow 110 formed inside the hollow body 100 can be closed from the outside. In the lock bolt having the tapered insertion portion, the workpiece 310 is formed.

That is, the workpiece 310 is filled with a certain thickness at the rear end of the hollow body 100 so that the rear end of the hollow body 100 can be joined by welding, and welded to the circumferential surface of the rear end.

The thickness of the weld 310 may be different depending on the pressure formed in the hollow 110 due to the fluid injected into the hollow body 100 at the time of installation of the lock bolt. The thickness of the welding material 310 may be relatively thick and the thickness of the welding material 310 may be relatively small when the pressure formed inside the hollow 110 is relatively low.

On the other hand, when the rock bolt to be installed in the perforation hole perforated in the ground or the rock is pulled or the rock bolt inserted for position change is pulled out from the perforation hole, Gravel, sand or the like is sandwiched between the outer surface of the rock bolt and the inner surface of the perforation hole, thereby preventing the rock bolt from being drawn out or out smoothly.

2, the tapered insertion portion 400 according to the first embodiment of the present invention has a structure in which the diameter of the hollow body 100 itself is smaller than the diameter of the hollow body 100 along the longitudinal direction of the hollow body 100 And the rear end joining portion 300 is provided at the rear end of the tapered insertion portion 400. The rear end joining portion 300 is formed integrally with the hollow body 100,

In order to manufacture the tapered insertion portion 400, the locking bolt is forcibly inserted into a triangle-shaped jig so that the diameter of the end portion of the locking bolt gradually decreases toward the rear end along the longitudinal direction.

The rear end joint part 300 is formed to prevent the fluid from flowing out to the outside when the fluid is injected into the inside of the lock bolt at the end of the rock bolt whose diameter of the rear end gradually decreases.

Although the rear end joint part 300 can be formed in various forms, in the present invention, the rear end joint part 300 is composed of a welding material 310 for closing the rear end of the rock bolt. In forming the welding material 310, Spot welding is performed so that the rear end of the locking bolt is prevented from being arbitrarily unfolded when the fluid is injected into the inside.

3, the tapered insertion portion 400 according to the second embodiment of the present invention has a distal end formed to have the same diameter as the diameter of the rear end of the hollow body 100, and the rear end of the hollow body 100 And an insertion member 410 formed to be gradually reduced in diameter along the longitudinal direction toward the rear end.

It is preferable that the tip of the insertion member 410 is formed to have the same diameter as the diameter of the rear end of the hollow body 100 and is joined by welding or an adhesive material because the locking bolt is inserted into the insertion hole 410 By preventing the stepped portion from being formed in the boundary region of the hollow body 100, the sand or gravel is scraped by the step so as to prevent the rock bolt from being caught in the perforation hole, thereby enabling smooth entry and exit.

4, the tapered insertion portion 400 according to the third embodiment of the present invention has a tip end formed to have the same diameter as the diameter of the rear end of the hollow body 100 and fastened to the void 101 And a wedge member 420 having a fastening protrusion 421 and a diameter gradually reduced toward the rear end along the longitudinal direction.

The distal end diameter of the wedge member 420 is formed to be the same diameter as the diameter of the rear end of the hollow body 100 like the insertion member 410 so that a step is formed in the boundary region between the wedge member 420 and the hollow body 100 So that the rock bolt can be prevented from being caught in the perforation hole by raking the sand or the body by such a step so as to enable smooth entry and exit.

The fastening protrusion 421 protrudes from the central region of the front end of the wedge member 420 along a longitudinal direction of the fastening protrusion 421. The fastening protrusion 421 may be forcedly press- So that the time required for fastening the wedge member 420 to the hollow body 100 can be shortened.

The rock bolt having the tapered insert according to the present invention having such a configuration can be manufactured by providing a separate tapered insertion portion instead of the conventional rear end cap at the rear end of the lock bolt, When the rock bolt inserted into the perforation hole is pulled out, the gravel or sand present inside the perforation hole is prevented from being caught between the outer surface of the rock bolt and the inner surface of the perforation hole, so that the rock bolt can be smoothly introduced and released .

It is to be understood that the scope of the present invention should not be construed as being limited to the embodiments described above, It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

100: hollow body 110: hollow
200: cap for cap 210:
300: rear end joint part 310:
400: tapered insertion portion 410: insertion member
420: wedge member 421: fastening projection

Claims (7)

A hollow 110 is formed to allow the fluid to flow in through the tip of the inlet where the fluid flows, and a part of the hollow 110 is pressed along the circumferential direction to form a hollow 101, A hollow body 100 into which a portion pressed by the fluid introduced into the perforation hole is expanded;
A tip cap 200 fixedly coupled to a distal end of the hollow body 100 so as to connect the spray unit 210 for spraying the fluid;
The hollow body 100 may be configured to prevent the fluid flowing into the hollow body 110 of the hollow body 100 from flowing out of the hollow body 100 through the injection part 210. [ A rear end joining portion 300 for joining the rear ends to be closed;
The hollow body 100 may be formed to be gradually reduced in diameter toward the rear end along the longitudinal direction of the hollow body 100 so that the hollow body 100 can be easily drawn into and drawn out of the hollow body 100, A tapered insertion portion 400 provided at the rear end; Including,
The tapered insertion portion 400 is formed such that the diameter of the hollow body 100 itself gradually decreases toward the rear end along the longitudinal direction of the hollow body 100 before the hollow body 100 is inflated And the rear end joint part 300 is formed integrally with the hollow body 100. The tapered insertion part 400 is formed integrally with the hollow body 100 by forming the end part of the hollow body 100 in a central area of the longitudinal side surface of the hollow body 100, Respectively,
The rear end joint 300 is filled in the rear end of the hollow body 100 so that the rear end of the hollow body 100 can be joined by welding and is welded to the circumferential surface of the rear end, (310) which is formed to have a predetermined length so as to gradually decrease in cross-sectional area toward the rear end of the hollow body (100) and pressurized to the rear end of the tapered insertion part (400) Wherein the locking bolt has a tapered insertion portion. delete delete delete delete delete delete
KR1020140030251A 2014-03-14 2014-03-14 Rockbolt having taper type insert part KR101884362B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020140030251A KR101884362B1 (en) 2014-03-14 2014-03-14 Rockbolt having taper type insert part
PCT/KR2015/001523 WO2015137634A1 (en) 2014-03-14 2015-02-16 Rock bolt having tapered insertion part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140030251A KR101884362B1 (en) 2014-03-14 2014-03-14 Rockbolt having taper type insert part

Publications (2)

Publication Number Publication Date
KR20150107388A KR20150107388A (en) 2015-09-23
KR101884362B1 true KR101884362B1 (en) 2018-08-01

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KR1020140030251A KR101884362B1 (en) 2014-03-14 2014-03-14 Rockbolt having taper type insert part

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WO (1) WO2015137634A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101153760B1 (en) * 2004-01-28 2012-06-13 케이에프씨 가부시키가이샤 Expandable injection bolt and grouting method using same

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11280399A (en) * 1998-03-27 1999-10-12 Tokai Rubber Ind Ltd Cap for lock bolt and lock bolt
KR100350048B1 (en) * 1999-12-02 2002-08-24 현대종합금속 주식회사 Titania based flux cored wire and a welding method using it
AT501441A3 (en) * 2004-12-23 2009-12-15 Atlas Copco Mai Gmbh METHOD FOR SETTING MOUNTAIN ANCHORS AND ATTACHABLE POOL ANCHORS USING THIS METHOD
KR100756536B1 (en) * 2006-12-11 2007-09-10 계림하이텍(주) Grout same time injection apparatus and a method of construction type reinforcement steel pipe
KR101038472B1 (en) * 2010-10-29 2011-06-02 주식회사 티에스테크노 Rockbolt and timbering method using the same
KR101219448B1 (en) * 2011-01-10 2013-01-11 주식회사 티에스테크노 Rockbolt and connector for the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101153760B1 (en) * 2004-01-28 2012-06-13 케이에프씨 가부시키가이샤 Expandable injection bolt and grouting method using same

Also Published As

Publication number Publication date
WO2015137634A1 (en) 2015-09-17
KR20150107388A (en) 2015-09-23

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