KR20170071139A

KR20170071139A - drilling device for curved hole

Info

Publication number: KR20170071139A
Application number: KR1020150179121A
Authority: KR
Inventors: 강효석
Original assignee: 주식회사 인산
Priority date: 2015-12-15
Filing date: 2015-12-15
Publication date: 2017-06-23

Abstract

The present invention relates to a curved hole drilling apparatus, and more particularly, to a curved hole drilling apparatus having a flexible rotary shaft and an arc-shaped guide pipe for supporting a rotary shaft, And more particularly, to a curved hole drilling apparatus capable of drilling holes easily.
The main structure of the present invention is a drilling apparatus comprising driving means having a rotary shaft and a drill bit detachably attached to a rotary shaft of the driving means and having a cutting edge at an end thereof, And the other end of which is detachably coupled to the rotating shaft; And a guide pipe which is detachably coupled to the driving means at one end thereof and guides the flexible rotation shaft so as to be rotatable in a bent state.

Description

[0001] DRILLING DEVICE FOR CURED HOLE [0002]

The present invention relates to a curved hole drilling apparatus, and more particularly, to a curved hole drilling apparatus having a flexible rotary shaft and an arc-shaped guide pipe for supporting a rotary shaft, And more particularly, to a curved hole drilling apparatus capable of drilling holes easily.

Further, the present invention relates to a curved hole drilling apparatus capable of drilling a more precise curved hole by guiding the drilling apparatus so that the drilling apparatus is smoothly moved in a direction in which the hole is drilled.

Generally, concrete structures are required to fix other devices or to form holes for pipes. Such holes may be formed by forming holes in advance of the structure, or after forming the structure, A method of forming a hole using a mechanism is used.

As described above, there are various drilling apparatuses as means for forming holes in the structure. Drill is widely used among the drilling apparatuses because it is easy to carry and operate.

The drill is provided with a cutting edge which is detachably attached to a shaft of a motor that receives electricity and is rotated. The drill is used to form a hole in an object having various materials according to the shape and material of the cutting edge. There are a variety of technologies including Patent Documents 1 to 3.

Patent Document 1 (Korean Patent No. 10-0351538) has a first portion forming a mounting end portion and a second portion forming a support portion on which a drill cutter is mounted, and these two portions are screwed together, , Wherein a groove is provided in one of the first portion and the second portion and a holding groove for holding a spring washer capable of expanding and contracting in the radial direction is disposed in the other portion of the drill tool And the interval A from the stop surface to the groove of one of the first portion and the second portion in which the groove is disposed coincides with the interval B from the stop surface of the other portion in which the receiving groove is disposed to the receiving groove , And the drill tool

Patent Document 2 (Korean Patent Registration No. 10-0592530) discloses a drill device for drilling a hole in a workpiece, the drill being axially coupled to a head portion, one end connected to a head portion, A gear box in which a motor as a drive means is fixed to one side and a planetary gear is provided in the gear box; a rotation shaft of a motor protruded to the gear box is fixed to one side; a drill shaft is inserted through the spline on the other side, A piston sleeve rotatably passed through the drill shaft and protruding from the piston head, a cylinder through which the piston casing is movably passed, and a cylinder through which the piston head is moved is formed A support housing having a cylinder casing, a cylinder casing penetrating the cylinder casing so as to be raised and lowered and having a space therein, And a pair of clutch means for pressing and fixing the cylinder casing. The present invention relates to a connecting plate drilling apparatus for a bridge,

Patent Document 3 (Korean Patent Registration No. 10-0564209) discloses a method of inserting a pipe into a ground or a rock to insert a pipe, which is a stress material, into a ground having poor geological conditions or a low toe- In the drill hole drill, the rotary impact perforator is composed of a drill shaft having a tip drill shaft on which a drill bit is mounted and a trailing drill shaft that forms a drive shaft of the rotary impacting drive motor, the drill shaft having bolt portions on opposite ends thereof; A through hole is formed so that the opposite end portions of the front end drill shaft and the rear end drill shaft are inserted into the front and rear of the drill shaft in the forward and backward directions so that the drill shaft and the drill shaft are opposed to each other A hammer type drill shaft connecting member formed with a nut portion to be threadedly engaged; And a pipe striking member of a synthetic resin material which is fastened to the outer peripheral edge on the end drill shaft and has a pipe and a connecting member receiving groove in which the rear end of the pipe and the tip end portion of the hammer drill shaft connecting member are seated, .

Conventional drills are devices that perforate holes in a straight line.

That is, although it is necessary to form an arc-shaped hole in the structure, the conventional drill has a disadvantage in that it is not possible to drill a curved hole because the drill can be drilled only in a straight line.

Korean Patent No. 10-0351538. Korean Patent No. 10-0592530. Korean Patent No. 10-0564209.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a curved hole drilling apparatus capable of drilling holes in a curved shape.

More specifically, the present invention provides an arc-shaped guide pipe having a flexible rotary shaft and supporting a rotary shaft to perforate the hole along the arc shape of the guide pipe, thereby making it possible to more easily perforate the curved hole It is another object of the present invention to provide a curved hole drilling apparatus capable of boring a more precise curved hole by guiding a punching device naturally in a direction in which a hole is punched.

In order to achieve the above object, the present invention provides a drilling apparatus including a drill bit having a rotary shaft and a drill bit removably mounted on a rotary shaft of the drill, A flexible rotating shaft having one end formed with a bit and the other end detachably coupled to the rotating shaft; And a guide pipe detachably coupled to the driving means at one end thereof and guiding the flexible rotary shaft so as to be rotatable in a state in which the flexible rotary shaft is bent in an arc shape.

A plurality of bearings may be installed between the flexible rotary shaft and the guide pipe.

It is preferable that the bit is formed to be larger than the outer diameter of the guide pipe.

In addition, the guide pipe or the driving means may further include a supporting means for supporting the perforating device so as to be moved in the arc direction of the guide pipe, wherein the supporting means comprises: Two or more guide bars fixed at one end to the object fixing plate and having an arc shape having the same radius as the guide pipe; And a moving bar having one end connected to the perforating device or the guide bar and the other end connected to the guide bar.

In addition, a support bracket may be further provided at the other end of the guide bar to maintain a gap between the guide bars.

As described above, the curved hole drilling apparatus according to the present invention has an effect that holes can be easily drilled as the drilling apparatus is moved along the guide pipe.

Further, since the perforating device is provided with the supporting means so that it can be moved along the arc-shaped guide bar, the arc can be formed more precisely in a desired direction.

By providing the support means in this manner, the drilling operation can be performed more stably.

1 is a perspective view of an example of a curved hole drilling apparatus according to the present invention.
2 is a side view, in use, of an example of a curved hole drilling apparatus according to the present invention.
3 is an enlarged cross-sectional view of a drill bit end of a curved hole drilling apparatus according to the present invention.
FIG. 4 is a perspective view of a driving unit of a curved hole drilling apparatus according to the present invention, and a joint portion of a flexible rotary shaft and a guide pipe. FIG.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the curved hole punching apparatus according to the present invention is for forming an arc-shaped hole more easily, and a bit 10b is formed at one end and a bit 10b is formed at the other end A flexible rotating shaft (10) detachably coupled to the rotating shaft; And a guide pipe (20) detachably coupled to the driving means at one end thereof and guiding the flexible rotary shaft so as to be rotatable in a bent state.

The curved hole drilling apparatus of the present invention includes driving means 100 for rotating the flexible rotary shaft 10 like a conventional drill, and the driving means is similar to a conventional drill, It is omitted.

However, in order to engage the flexible rotary shaft 10 and the guide pipe 20, the structure of the exposed end of the rotary shaft 110 is deformed, as shown in FIG. 4 in the drawing.

That is, the guide pipe 20 is a means for supporting the flexible rotation shaft 10 so that the flexible rotation shaft 10 can be rotated even in a state of being bent in a arc shape. A guide connecting portion 120 is formed on the outside of the end portion of the rotating shaft 100 where the rotating shaft is exposed. The guide connecting portion 120 has a circular rod shape having an inner circumferential surface of the guide pipe 20, A key groove 120k is formed on the outer circumferential surface so that the coupling protrusion 20d formed at one end of the guide pipe 20 is fitted so that the guide pipe 20 does not rotate even if the flexible rotation shaft 10 rotates due to the engagement.

In this case, the flexible rotating shaft 10 can transmit the rotational force of the driving means 100 to the bit 10b even in a state of being bent in a arc shape, and a wire made by twisting a plurality of steel wires can be used.

The bit 10b may be provided at one end of the flexible rotary shaft 10 as described above and the other end may be detachably coupled to the rotary shaft 110 of the driving means 100. [

4, the means for detachably coupling the flexible rotary shaft 10 to the rotary shaft 110 of the driving means may include a rectangular or polygonal coupling (not shown) at the end of the flexible rotary shaft 10, The projection 10d is formed and the key groove 110k to which the engaging projection 10d is engaged is formed on the rotating shaft 110. [

A spherical groove is formed in the key grooves 110k and 120k and a ball which is elastically supported by a spring is provided on the engaging projections 10d and 20d so that the flexible rotary shaft 10 and the guide pipe 20 are driven When coupled to the means 100, they are rigidly coupled so that they do not separate without the force externally acting.

In addition, a plurality of bearings 30 may be provided between the flexible rotary shaft 10 and the guide pipe 20.

As described above, only the flexible rotary shaft 10 rotates in the fixed state of the guide pipe 20, and the friction between the rotating flexible shaft 10 and the fixed guide pipe 20 is minimized For this purpose, the flexible rotary shaft and the guide pipe may be made of a bearing metal having wear resistance, but it is preferable to provide a plurality of bearings 30 in consideration of the flexibility of the flexible rotary shaft.

The bit 10b should be larger than the outer diameter of the guide pipe 20.

The perforation apparatus of the present invention is such that the guide pipe is inserted into the perforated hole and the perforation can be made when the outer diameter R2 of the bit 10b is smaller than or equal to the outer diameter R1 of the guide pipe 20. [ Therefore, the outer diameter R2 of the bit 10b should be larger than the outer diameter R1 of the guide pipe 20, and the difference in diameter should be formed at least to the extent that the drilled material can be discharged to the outside.

In addition, the guide pipe or the driving means may further include a support means 40 for supporting the perforating device so as to move in the arc direction of the guide pipe.

However, if the length of the guide pipe and the flexible rotation shaft becomes long, the bit 10b of the end portion can not be closely attached to the perforated surface, Becomes difficult. Accordingly, the supporting means 40 is further provided to support the entire perforating device, and a support means is provided to allow the perforating device to move in the direction of the perforated arc.

As shown in Fig. 1, the support means 40 may be variously modified. Preferably, the support means 40 includes an object fixing plate 41 which is in close contact with the object to be processed. At least one guide bar (42) having one end fixed to the object fixing plate and having an arc shape having the same radius as the guide pipe; And a moving bar 43 having one end connected to the perforating device or the guide bar 42 and the other end formed with a guide hole 43h to be moved along the guide bar 42. [

When the object fixing plate 4 is brought into close contact with the object to be perforated, the direction of the bit 10b of the flexible rotary shaft end is aligned with the arc-shaped perforation opening desired to be perforated.

When the boring device is pushed to the object side while the drilling is being performed, the movement bar 43 moves along the guide bar 42 of the support means, And the perforating device fixed to the moving bar moves to the arc path according to the movement of the moving bar.

In addition, the support bracket 44 may be further provided at the other end of the guide bar to maintain the gap between the guide bars.

As described above, it is preferable to further provide the support bracket so that the distance between the guide bars is maintained by the object fixing plate and the movement bar, but the gap and direction between the guide bars are maintained more firmly. So that it can be easily separated when a perforating device is installed on a guide bar of a different diameter.

10: flexible rotating shaft 10b: bit
10d: engaging projection 20: guide pipe
20d: engaging projection 30: bearing
40: support means 41: object fixing plate
42: Guide bar 43: Moving bar
44: end fixing plate 100: driving means
110: rotating shaft 110k: keyway
120: guide connection part 120k: keyway

Claims

And a drill bit provided at an end of the drill bit, the drill bit being detachably attached to a rotary shaft of the drive means,
A flexible rotating shaft 10 having one end formed with a bit 10b and the other end detachably coupled to the rotating shaft;
And a guide pipe (20) detachably coupled to the driving means at one end thereof and guiding the flexible rotary shaft so as to be rotatable with the flexible rotary shaft bent in an arc shape.

In the provision,
And a plurality of bearings (30) are installed between the flexible rotation shaft and the guide pipe.

The method according to claim 1,
Wherein the outer diameter (R2) of the bit (10b) is formed to be larger than the outer diameter (R1) of the guide pipe (20).

The method according to claim 1,
The guide pipe or the driving means may further comprise support means (40) for supporting the perforating device so as to be moved in the arc direction of the guide pipe,
The supporting means (40)
An object fixing plate 41 adhered to the object to be processed;
At least one guide bar (42) having one end fixed to the object fixing plate and having an arc shape having the same radius as the guide pipe; And
And a moving bar (43) having one end connected to the perforating device or the guide bar and the other end having a guide hole to be moved along the guide bar.

5. The method of claim 4,
And an end fixing plate (44) for holding the gap between the guide bars is detachably installed at the other end of the guide bar.