KR20150103862A - Rock bolt - Google Patents

Abstract

The present invention relates to a rock bolt. Provided is a rock bolt comprising: a main body unit formed with a mortar discharge hole to discharge a mortar in order by being formed on an outer circumferential surface of the main body unit; a coupling member extrapolated to the main body unit, and formed with a sectioning unit towards at least one of the inner circumferential surface or the outer circumferential surface to prevent the main body from leaving an inside of a perforation; and a sealing member insert coupled to an entrance of the perforation to prevent mortar injected to the inside of the perforation from leaking to the outside.

Description

Rock bolt {ROCK BOLT}

The present invention relates to a lock bolt, and more particularly, to a lock bolt including a main body portion having a through hole formed therein, a mortar discharge hole formed on an outer peripheral surface thereof, and a coupling member extrapolating to the main body portion.

Generally, civil engineering works to create roads and tunnels involves shoveling or excavating mountains or ground. Among them, the tunnel construction forms a foundation hole at a position where a tunnel is to be formed, and uses an explosive such as dynamite to widen the foundation hole little by little to form a foundation tunnel. When the foundation tunnel is formed as described above, the reinforcing film construction for pouring concrete on the inner wall of the foundation tunnel is carried out by using the shotcrete pouring device. Then, in order to prevent the tunnel from collapsing, a puncture is formed in the reinforcing membrane, a rock bolt is inserted, and mortar is injected to fix the rock bolt together with the rock bolt. An example of the prior art for such a rock bolt is disclosed in Korean Registered Utility Model No. 20-0372672 entitled " Spacer Lock Bolt ".

The spacer lock bolt includes a lock bolt main body to which a plurality of latching hatches are welded at equal intervals in three longitudinal rows or more along the outer circumferential surface to be inserted into the hole of the rocker hole, and a mortar is inserted between the rock bolt main body and the rock bolt hole A mortar finishing cap formed at one end of the mortar injection pipe to prevent the injected mortar from flowing down, and a mortar end cap inserted into the distal end of the lock bolt main body, And a nip and a nut for fixing.

However, the spacer lock bolt has a disadvantage in that the manufacturing cost of the lock bolt body is increased due to the weight of the lock bolt body being made strong, and the lock bolt body is detached from the inside of the hole.

In addition, the spacer lock bolts have drawbacks in that the mortar injection pipe is inserted into the perforations and the mortar is injected to lower the workability.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a locking bolt including a main body portion having a through hole formed therein and a mortar discharge hole formed therein, and a coupling member extrapolating to the main body portion.

In order to accomplish the above object, the present invention provides a rock bolt inserted into a perforation formed in a rock body to support a mortar so as to prevent the rock from collapsing, and is formed on the outer circumferential surface of the main body A body portion formed with a mortar discharge hole for sequentially discharging mortar; a body portion having a mortar discharge hole formed therein, the body portion being extrinsic to the body portion and forming a slice portion from at least one of an inner circumferential surface and an outer circumferential surface, And a sealing member which is fitted to the inlet of the hole to prevent the mortar injected into the hole from leaking to the outside.

Further, preferably, the mortar discharge holes 110 are individually formed on the outer peripheral surface of the main body portion with different inner diameters, and the mortar is sequentially discharged into the perforations.

Preferably, the main body further includes a fixing cap, the lower end of which is fitted to the upper portion of the main body, and the fixing cap is formed on the outer circumferential surface so that two or more fixing jaws are spaced apart from each other.

Preferably, the fixed cap includes a mortar discharge hole 125 formed between two adjacent fixed jaws, and further a wedge groove is formed on the outer peripheral surface of the mortar discharge hole 125 to expand the contact area between the mortar and the main body portion .

Further, preferably, the binding member is formed by sequentially alternating the slice portions upward from at least one of the inner circumferential surface and the outer circumferential surface of the binding member so as to prevent the body portion from being separated from the inside of the perforation.

Preferably, the sealing member further includes a body portion for sealing the opening of the perforation, and a stopper plate for limiting the insertion depth of the body portion.

Preferably, the sealing member is further formed with a through hole through which the body portion can be inserted into the perforation, and the body portion is fixed to press the sealing member when inserted into the perforation through the through hole.

Preferably, the discharge tube further includes a discharge tube for discharging residual air inside the perforation hole when injecting the mortar through the sealing member, or discharging the mortar to the outside when the mortar is excessively injected.

According to the present invention having the above structure, the mortar discharge hole is formed in the body portion of the rock bolt inserted into the perforation, and the locking bolt is fixed firmly to the inside of the perforation by extrapolating the binding member to the body portion.

Further, according to the present invention having the above-described structure, the through hole is formed in the body portion to reduce the weight, thereby reducing the manufacturing cost and reducing the possibility of the body portion being removed from the inside of the hole.

In addition, the present invention having the above-described structure has the effect of increasing the workability by injecting mortar into the perforations through the through holes of the main body.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front view showing an operating state of a lock bolt according to an embodiment of the present invention; Fig.
3 and 4 are front views showing a locking bolt according to an embodiment of the present invention;
5 and 6 are cross-sectional perspective views illustrating a locking bolt according to an embodiment of the present invention.
7 is a perspective view showing an attachment groove of a lock bolt according to an embodiment of the present invention;
8 is a partial cross-sectional view showing a fixing groove of a locking bolt according to an embodiment of the present invention.

Hereinafter, preferred embodiments of a lock bolt according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 and 2 are front views showing an operating state of a lock bolt according to an embodiment of the present invention, Figs. 3 and 4 are front views showing a lock bolt according to an embodiment of the present invention, Figs. 5 and 6 FIG. 7 is a perspective view illustrating a mounting groove of a locking bolt according to an embodiment of the present invention, and FIG. 8 is a perspective view of a locking bolt according to an embodiment of the present invention. Sectional view showing the fixing groove.

1 to 6, a lock bolt 10 according to an embodiment of the present invention includes a main body 100, a binding member 200, a sealing member 300, a discharge tube 330, A nut 400 and a mortar backflow prevention cap 500.

The main body 100 is inserted into a rock having a hole H formed therein, and injects the mortar M injected from the outside into the hole. Specifically, the main body 100 has a cylindrical or polygonal cross section, and is formed to protrude in the longitudinal direction, and serves to inject the mortar M injected from the outside into the perforation H.

The main body 100 includes a through hole 101, a mortar discharge hole 110, a fixed cap 120, and a fixing groove 130.

The through hole 101 is formed in the main body 100 and functions as a transfer passage so that the mortar M supplied from the outside can be injected into the hole H. [

The thread 102 is formed at the end of the outer circumferential surface of the main body 100 so that the clamping nut 400 is used to press the millefeel 300. [

The mortar discharge hole 110 is formed on the outer circumferential surface of the main body 100 and sequentially discharges the mortar M injected from the outside into the through hole 101 into the perforation H. Specifically, the mortar discharge holes 110 are individually formed on the outer circumferential surface of the body portion 100 with different inner diameters, and sequentially discharge the mortar M injected from the outside into the perforations H.

At this time, the mortar discharge hole 110 may be formed of any one of circular, elliptical, or long-hole type. The mortar discharge hole 110 may be formed in the main body portion 100 100) from separating from the inside of the perforation (H).

The fixed cap 120 has a through hole 121 formed therein to serve as a conveyance passage so that the mortar M supplied from the outside can be injected into the perforation H, So as to prevent the main body 100 from deviating from the inside of the perforation H to the outside.

Specifically, the fixed cap 120 is formed in a cylindrical shape and includes an insertion portion 122 to be fitted into an upper portion of the body portion 100, a cylindrical portion 120 formed to extend from the upper side of the insertion portion 122 in a cylindrical shape, 122 which are spaced apart from each other on the outer circumferential surface of the engaging part 123 and the engaging part 123 for limiting the insertion depth of the main body part 100 and the outer circumferential surface of the engaging part 123, ).

Here, the fixed cap 120 may be formed of a metal material or a rubber material, and is preferably made of a material resistant to corrosion. Further, as shown in Fig. 7, the fixing jaw 124 may be formed in one or more of wedge, cone, or rod shapes.

The fixed cap 120 forms a mortar discharge hole 125 on the outer circumferential surface of the engaging portion 123 or in two or more adjacent fixing jaws 124. At this time, the mortar discharge hole 125 discharges the mortar M injected from the outside into the perforation H, and the main body portion 100 is punched through the mortar M through the increase of the adhesion resistance as the contact area with the mortar M expands. (H) from the inside.

At this time, the mortar discharge holes 125 may have the same inner diameter or different inner diameters, and may be formed in at least one of a circular shape, an elliptical shape, and a long hole shape. The mortar discharge hole 125 further has a wedge groove 126 formed on the outer circumferential surface to assist the function of the fixed cap 120 through an increase in adhesion due to expansion of the contact area with the injected mortar M do.

The fixing groove 130 is formed on the outer circumferential surface of the main body 100 and serves to assist the function of the fixed cap 120 by increasing the adhesion due to expansion of the contact area with the mortar M injected into the hole H . Here, the fixing groove 130 is formed by pressing or cutting the outer peripheral surface of the main body 100 with a press.

Meanwhile, as shown in FIG. 8, the fixing groove 130 may be formed in various shapes. 8A, a step can be formed by a difference between the diameter of the main body 100 and the diameter of the fixing groove 130, and the mortar M is injected into the step formed through the fixing groove 130 Even if an external force acts on the main body 100, the main body 100 can be prevented from being detached from the mortar M by performing a step-like action.

8 (b), the fixing groove 130 may be formed to have a curved surface. By way of analogy, the fixing groove 130 may be formed in a shape similar to a bamboo joint.

8 (c), the fixing groove 130 may have a plurality of protrusions formed on the surface thereof in a cylindrical shape.

1 to 6, the binding member 200 is formed in a cylindrical shape and is extrapolated to the main body part, and the slicing part 210 is formed upward from at least one of the inner circumferential surface and the outer circumferential surface, To prevent the main body 100 from being detached from the main body 100.

Specifically, the binding member 200 is formed by alternately forming the slice portions 210 in an upward direction on at least one of the inner circumferential surface and the outer circumferential surface of the binding member 200, so that the body portion 100 is detached from the perforation H ≪ / RTI > At this time, the binding member 200 may be formed of a metal material and may be formed of a material resistant to corrosion.

2, 4 and 6, the wedge-shaped protrusion 210 is formed on the other side of the binding member 200 so as to face one side welded to the outer peripheral surface of the main body 100 The main body 100 may be formed so as not to be detached from the inside of the perforation H through the contact between the injected mortar M and the protrusion 210. At this time, the binding member 200 may be formed of a metal material and may be formed of a material resistant to corrosion.

The sealing member 300 is formed in a plate shape and is fitted to the inlet of the hole H to prevent the mortar M injected into the hole H from leaking to the outside. Specifically, the sealing member 300 includes a body portion 310 for sealing the opening of the hole H and a stop plate 320 for limiting the insertion depth of the body portion 310.

At this time, the body 310 and the retaining plate 320 may be formed as one type or separate type, and the body 310 and the retaining plate 320 may be formed of a metal material or a rubber material, It is desirable to be made of strong material.

The sealing member 300 further includes a through hole 301 through which the main body 100 can be inserted into the perforation H and the main body 100 is provided with a through hole 301 The sealing member 300 is fixed to be pressed.

When the mortar M is poured through the sealing member 300, the muffer member 300 discharges the residual air inside the pore H to the outside when the mortar M is injected. When the mortar M is excessively injected, And a discharge tube (330) for discharging the discharge tube (M) to the outside. At this time, the discharge tube 330 may be formed of a metal material or a rubber material, and is preferably made of a material resistant to corrosion.

The coupling nut 400 is coupled to the thread 102 of the main body 100 and presses the coupling plate 320 of the closure member 300 to fix the main body 100 in the hole H. [

The mortar backflow prevention cap 500 is fitted to the lower portion of the main body 100 to prevent the injected mortar M from flowing backward.

Specifically, a mortar injector (not shown) is inserted into the mortar backflow prevention cap 500 and the mortar M is injected into the perforation H through the through hole 101, Thereby preventing the backflow along the hole 101. [

The mortar backflow prevention cap 500 includes a body portion 510 inserted into the through hole 101 of the body portion 100 and a through hole formed in the body portion 510 so that a mortar injector And a sealing part 520 installed on the lower side of the body part 510 for preventing the backflow of the injected mortar by opening and closing the through hole 511. [

The process of installing the lock bolts will be described in detail with reference to FIG.

First, a perforation (H) is formed in the rock, and the closure member (300) is fitted into the perforation (H) inlet. The main body 100 is inserted into the hole H through the through hole 301 of the sealing member 300 and then the coupling nut 400 is fastened to the thread 102 of the main body 100 , The sealing member 200 is pressed and the main body 100 is fixed in the perforation H.

Then, the discharge tube 330 is inserted into the perforation H through the discharge hole 302 of the sealing member 300.

Then, the mortar M is injected into the through hole 101 of the main body 100 by inserting the mortar backflow prevention cap 500 into the mortar backflow prevention cap 500.

At this time, the air remaining in the perforations H in the perforations H through the mortar M is discharged through the discharge tubes 330 inserted into the discharge holes 302 of the closure member 300, When the mortar M is excessively injected into the perforation H, the excessively injected mortar M is discharged to the outside through the discharge tube 330.

Subsequently, when injection of the mortar M into the perforation H is completed, the mortar injector (not shown) is separated from the mortar backflow prevention cap 500.

The mortar discharge hole 110 is formed in the main body 100 and the binding member 200 is extrinsic to the main body 100 so that the inside of the perforation H There is an advantage that the lock bolt 10 can be firmly fixed.

According to the lock bolt according to the embodiment of the present invention, the sealing member 300 is inserted into the hole H and the main body 100 is inserted through the through hole 301 of the mille- The fastening nut 400 is fastened to the thread 102 of the main body 100 so that the fastening nut 400 presses the fastening plate 320 of the closure member 300 There is an advantage that the mortar M can be prevented from leaking to the outside by fixing the main body 100 in the perforation H.

According to the lock bolt according to the embodiment of the present invention, when the injection tube 330 is inserted into the hole H through the discharge hole 302 of the sealing member 300 and the mortar M is injected, There is an advantage that the residual air inside the perforation H is discharged through the tube 330 and the mortar M can be discharged to the outside through the discharge tube 330 when the mortar M is overcharged.

According to the lock bolt according to the embodiment of the present invention, the through hole 101 is formed in the main body 100 to reduce the manufacturing cost by reducing the weight, There is an advantage that the possibility of departure can be reduced.

The mortar M can be injected through the through hole 101 of the main body 100 without injecting the mortar M by inserting a mortar pipe (not shown) There are advantages.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, 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 appended claims. Accordingly, the true scope of the present invention should be determined by the following claims.

10: Rock bolt
100: main body 101: through hole
102: thread 110: mortar discharge hole
120: fixed cap 121; Through hole
122: insertion part 123:
124: Fixing jaw 125: Mortar discharge hole
126: wedge groove 130: fixing groove
131:
200: binding member 210:
300: sealing member 301: through hole
302: Discharge hole 310: Body part
320: Retaining plate 330: Discharge tube
400: Clamping nut
500: Mortar backflow prevention cap

Claims (8)

A rock bolt inserted into a perforation formed in a rock body to inject mortar into the perforation and to support the rock so that the rock is not collapsed,
A main body portion having a mortar discharge hole for sequentially discharging the mortar;
A binding member which is extrinsic to the main body and forms a cut-out portion from at least one of an inner circumferential surface and an outer circumferential surface so as to prevent the main body from being separated from the inside of the perforation; And
And a sealing member fitted in the opening of the bore to prevent leakage of the mortar injected into the bore. The method according to claim 1,
Wherein the mortar discharge holes (110) are individually formed on the outer circumferential surface of the body portion with different inner diameters, and the mortar is sequentially discharged into the perforations. The method according to claim 1,
Wherein,
Further comprising a fixed cap fitted to an upper portion of the main body and having two or more fixing protrusions spaced from each other on the outer circumferential surface to prevent the main body from being detached from the inside of the perforation. The method of claim 3,
The fixed cap
A mortar discharge hole 125 is formed between adjacent two or more fixed jaws and a wedge groove is further formed on the outer peripheral surface of the mortar discharge hole 125 to expand a contact area between the mortar and the main body portion Rock bolt to do. The method according to claim 1,
The binding member
Wherein the slit portions are alternately formed in at least one of an inner circumferential surface and an outer circumferential surface of the binding member in an upward direction to prevent the main body portion from being detached from the inside of the perforation. The method according to claim 1,
Wherein the sealing member further comprises a body portion for sealing the opening of the perforation, and a latching plate for limiting an insertion depth of the body portion. The method according to claim 1,
The sealing member may further include a through hole through which the main body portion can be inserted into the perforation,
Wherein the main body is fixed to press the closure member when inserted into the perforation through the through hole. The method according to claim 1,
Further comprising a discharge tube for discharging the residual air inside the perforations to the outside when the mortar is pierced through the sealing member or discharging the mortar to the outside when the mortar is excessively injected Rock bolt.

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