KR20200006428A - Tool for making holes - Google Patents

Abstract

The present invention relates to a hole processing tool capable of quickly and easily discharging residues after punching work. The hole processing tool includes: a punch body including a hollow punch part formed at a tip extended in a longitudinal direction of the tool, a first screw part formed at the other tip, and a first protrusion part integrated between the first screw part and the hollow punch part; a holder body including a second screw part formed at a tip facing the first screw part, a tool combination part formed at a tip opposite to the second screw part, and a second protrusion part integrated between the tool combination part and the second screw part; a hollow body screwed with the second screw part and the first screw part, and having an internal space connected mutually with the internal space of the punch body; an elastic body placed in the internal space of the hollow body; and an internal block placed to be able to move by the elastic body or external force from a front position of the elastic body in the internal space of the punch body and the internal space of the hollow body.

Description

Hole making tool {TOOL FOR MAKING HOLES}

The present invention relates to a hole processing tool for drilling holes in a drilling work object having a material that is relatively soft compared to a metal material, such as insulation or insulation of ship cargo or piping, insulation and other chair cushion cloth and sponge.

In general, ships are built to be used in oceans, seas, lakes, rivers, etc. for a long time because structures, attachments, and assemblies of various materials are combined.

The ship is fitted with heat insulating material or heat insulating material for hull or cargo inside of the ship, steel or structural material such as dwelling port, and piping.

For example, the heat insulating material of the ship's main pipe is attached to the outside of the pipe to exhibit the heat insulating and insulating performance, and at this time has a plurality of holes for the discharge of the water condensed by the internal and external temperature difference.

In the case of a chair having a cushion used around the living, there is a case that the chair insulation for discharging the sweat generated from the user when used for a long time also has a plurality of holes.

According to the prior art, the work object which requires a hole processing among the heat insulating material or the heat insulating material is a hole work is made using a tool such as a hollow punch and a hammer.

In addition, in case of drilling holes in specialized equipment or in mass production using punching machine, even if a batch operation is performed by installing a plurality of punches, it is not suitable for the production of small quantities of various types, and the position of the holes may change from product to product. Therefore, at this time, due to the size of the additional device mounted on the punching machine, the situation may be limited to change the hole position.

In addition, even when bringing the pre-punched insulation to the site and working with holes in the same position as the bolt hole, the hole for drain piping, and the fluid discharge passage of the additional installation, manual work for a lot of holes is required. It is becoming.

In particular, the hole processing in the field causes an error in the drilling quality in relation to the skills or proficiency of the user, it is difficult to adjust the force to use the hammer in the hollow punch has a disadvantage that it is very difficult to control the drilling depth.

In particular, the overhead drilling operation, with the upper part of the structure with the object to be projected more like an eave than the lower part and covering the user's head, is not only difficult to process a plurality of holes with a hollow punch and a hammer, but also reduces productivity and the user. It is very likely that musculoskeletal disorders are caused.

In addition, a work object having elasticity such as a sponge, a heat insulating material, and the like after the punching or punching operation, a residue having elasticity remains inside the hollow punch, and there is a problem that it is very difficult to separate the residue from the hollow punch by elastic force and frictional force. .

Therefore, not only can be mounted and used on the electric drill in the field, but also to adjust the drilling depth in order to process the desired drilling depth as well as penetrating during the drilling, it is easy to discharge or separate the residue inside the tool after drilling There is an urgent need for means.

In the present invention, it is possible to easily and quickly discharge the residue of the work object having a relatively soft and elastic in nature, such as insulation, insulation, etc. by using the elastic force, it is possible to quickly reuse the tool, use and operation The present invention seeks to provide a hole making tool that is very easy and can be mounted on an electric drill to smoothly perform a drilling operation.

Technical problems to be achieved in the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

MEANS TO SOLVE THE PROBLEM In order to solve the subject mentioned above, this invention forms a hollow punch part in the one end extended in the tool longitudinal direction, forms the 1st threaded part in the other end, and is integrated between the said 1st threaded part and the said hollow punch part. A punch body having a first stepped portion formed therein; A holder having a second threaded portion formed at an end facing the first threaded portion, a tool fastened portion formed at an opposite end of the second threaded portion, and a second stepped portion integrally formed between the tool fastened portion and the second threaded portion; Body; A hollow body screwed to the second threaded portion and the first threaded portion, the hollow body having an inner space connected to the inner space of the punch body; An elastic body disposed in an inner space of the hollow body; And an inner block movably disposed by an external force or an elastic body in the inner space of the hollow body and the inner space of the punch body with respect to the front position of the elastic body.

The punch body may further include a stepped surface formed on a first stepped portion on the basis of a point connected to the hollow punched portion so as to have a relatively larger area than the end of the hollow punched portion, and the end of the first stepped portion The protruding distance between the vehicle surface and the end of the hollow punch portion may be determined corresponding to the thickness of the workpiece to be machined.

In addition, the punch body may be connected to each other in space such that the inner space of the hollow punch part, the first stepped part and the first screw part have the same inner peripheral surface.

In addition, the tool fastening portion of the holder body may have a relatively small diameter compared to the second stepped portion so as to be fastened to the chuck assembly of the power tool.

In addition, the hollow body may have the same wall thickness over an area for the movement of the inner block, and may have an inner circumferential surface that guides the movement of the inner block.

In addition, the elastic body may be a compression spring for pushing out the inner block with an elastic force.

In addition, the inner block, the push bar having a diameter corresponding to the inner space of the punch body so as to maintain the play required for the movement of the inner block, and integrally formed in the push bar, relatively larger diameter than the push bar Having a diameter slidable in the inner space of the hollow body, it may include an extension in contact with the elastic body.

According to the hole drilling tool according to the embodiment of the present invention, by mounting and using the power tool, it is possible to increase the work convenience compared to the punching operation using a conventional hammer, to maximize the work efficiency, the disease of the musculoskeletal system of the user There is an advantage to prevent.

According to the hole drilling tool according to the embodiment of the present invention, the elastic body is compressed by the residue introduced when the user processes the hole using the power tool, and when the power tool is spaced apart from the work object, the elastic force of the elastic body is reduced. By quickly discharging the residue to the outside, it is possible to easily process the hole of the desired perforation depth in the workpiece and then to remove the residue, thereby improving the inconvenience caused by removing the residue manually, thereby reducing productivity. There is an advantage to avoid.

According to an embodiment of the present invention, there is an advantage that can form a stepped surface at a position corresponding to the depth of drilling, so that excessive drilling does not occur in the thickness direction of the workpiece.

Effects obtained in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

1 is a perspective view of a hole machining tool according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the hole machining tool shown in FIG. 1. FIG.
3 is a cross-sectional view taken along the line AA shown in FIG. 1.
FIG. 4 is a cross-sectional view for explaining a discharging operation of the residue introduced into the hole machining tool shown in FIG. 3.
FIG. 5 is a view for explaining a drilling operation using the hole machining tool shown in FIG. 1. FIG.

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

The detailed description, which will be given below with reference to the accompanying drawings, is intended to explain exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced.

In the drawings, parts irrelevant to the description may be omitted, and the same reference numerals may be used for the same or similar elements throughout the specification.

1 is a perspective view of a hole machining tool according to an embodiment of the present invention, Figure 2 is an exploded perspective view of the hole machining tool shown in FIG.

1 and 2, the hole machining tool 10 is used by attaching and detaching a power tool to process a hole in the workpiece of the elastic material.

In consideration of the hole diameter, the hole processing tool 10 may be manufactured for each size corresponding to the hole diameter, that is, it may be composed of a plurality or a set of pieces.

The hole processing tool 10 according to an embodiment may be a semi-automatic drilling means incorporating an elastic body 400 capable of quickly and easily removing residue.

To this end, the hole machining tool 10 may include a punch body 100, a holder body 200, a hollow body 300, an elastic body 400, and an inner block 500.

The hole making tool 10 is composed of three components, such as the punch body 100, the holder body 200, and the hollow body 300, in view of only the elements constituting the outer shape thereof, Since separation and assembly are possible, there is an advantage in that maintenance and manufacture are very easy.

For example, based on the punching edge 111 of the hole making tool 10 facing down, the punch body 100 corresponds to a tool bottom, and the hollow body 300 corresponds to a tool middle. corresponds to the middle, and the holder body 200 may correspond to a tool top.

The punch body 100 may be made of a high strength and high elastic metal material for the drill bit.

The punch body 100 may be integrally formed, and may include a hollow punch part 110, a first screw part 120, and a first stepped part 130 having internal spaces connected to each other.

The hollow punch part 110 is formed at one end extending in the tool length direction of the punch body 100.

The diameter (eg, the outer diameter or the inner diameter) of the hollow punch part 110 may be determined in various ways according to the hole processing purpose, use place, and use.

That is, the hollow punch 110 may be manufactured in various forms to correspond to the size of the hole to be processed in the workpiece.

Accordingly, the size of the punch body 100 or the size of the hollow punch part 110 (for example, the protrusion distance L or the outer diameter and the inner diameter of the hollow punch part 110) may be variously manufactured to correspond to the size of the hole to be processed. Can be set.

In addition, a punching blade 111 for punching the work object of the elastic material is formed integrally inside the end portion of the hollow punch part 110.

Here, the punching edge 111 may mean a slanted cutter inclined toward the center of the hollow punch part 110 in a tube shape or a hollow shape.

The first threaded portion 120 is formed at the other end of the punch body 100.

The first threaded portion 120 may form a male screw for fastening or separating the hollow body 300 and the punch body 100.

The first stepped part 130 is integrally formed between the first threaded part 120 and the hollow punch part 110.

The punch body 100 has a stepped surface 131 formed in the first stepped part 130 on the basis of a point connected to the hollow punch part 110 so as to have a relatively large area than the end of the hollow punch part 110. It includes.

Here, the stepped surface 131 of the first stepped portion 130 refers to the end surface of the first shortened portion 130 while having a relatively large area than the end of the hollow punched portion 110, and the work object ( 30) it may be a stepped portion in the sense of serving as a stop jaw in contact with the back.

In addition, the stepped surface 131 of the first stepped portion 130 may be a surface that is precisely processed to be in surface contact with the surface of the work object 30 or the work guide plate 40 of FIG. 5 to be described later. Can be.

In addition, the protruding distance L between the stepped surface 131 of the first stepped portion 130 and the end of the hollow punched portion 110 corresponds to the thickness of the workpiece 30 (see FIG. 5) to be drilled. Can be determined.

For example, the protruding distance L may be a distance between the stepped surface 201 of the holder body 200 and the end of the hollow punch part 110 (eg, the end of the punching edge 111).

Depending on whether the work guide plate 40 is used, the protruding distance L may be either the thickness of the work object 30, or the total thickness of the work object 30 and the work guide plate 40.

In addition, the punch bodies 100 are connected to each other in space such that the internal spaces of the hollow punch part 110, the first stepped part 130, and the first threaded part 120 have the same inner circumferential surface.

The inner circumferential surface of the same level may be a movement path or a slidable sliding surface of the inner block 500 described later.

In addition, the punch body 100 is on the outer circumferential surface of the first stepped portion 130 to be a force transmission base of a separate assembly tool (not shown) for fastening or separating the hollow body 300 and the punch body 100. It may include a plurality of formed smooth surface 132.

The smooth surface 132 facilitates access and use of an assembly tool for coupling or tightening the hollow body 300, the holder body 200, and the punch body 100 to each other.

Since the user can be in close contact with the assembly tool on the smooth surface 132, the punch body 100 of the cylindrical shape can be easily coupled to the hollow body 300, or the punch body 100 for maintenance and parts replacement ) Can be separated from the hollow body (300).

The holder body 200 may be a part fastened to the power tool.

The holder body 200 may be a means for adjusting the size of the restoring force of the elastic body 400.

That is, the holder body 200 may contact the elastic body 400 when the holder body 200 is coupled to the hollow body 300 by screwing.

At this time, the elongation of the elastic body 400 can be reduced in proportion to the movement amount of the holder body 300 with respect to the hollow body 300, and as a result, the restoring force for the elastic body 400 to push the inner block 500 to move. The size of can be adjusted proportionally.

That is, when the holder body 200 is tightened in a direction close to the hollow body 300, the restoring force of the elastic body 400 may be relatively large, and the holder body 200 may be moved away from the hollow body 300. If less tightened, the restoring force of the elastic body 400 may be relatively small.

By adjusting the tightening amount of the holder body 200 to adjust the restoring force of the elastic body 400, the user can change the optimal condition value that can push the residue through the inner block (500).

That is, the frictional force between the outer surface of the residue and the inner circumferential surface of the punch body 100 may vary according to the material characteristics of the residue, in which the user adjusts the tightening amount of the holder body 200 to restore the elastic body 400. Can be changed.

When the restoring force needs to be changed, the user can selectively replace the elastic body 400 having a stronger or weaker elastic force or a restoring force than the conventional one so as to correspond to the use place of the hole machining tool 10 and the material or characteristic of the workpiece. It can also be mounted on (10).

The holder body 200 may include a second threaded portion 210, a tool fastening portion 220, and a second stepped portion 230.

The holder body 200 may be formed of the same material as the punch body 100 or may be formed of any one material of a metal material, an alloy material, and an engineering plastic material.

The second threaded portion 210 is formed at the end of the holder body 200 facing the first threaded portion 120 of the punch body 100.

The second threaded portion 210 may form a male screw for fastening or separating the hollow body 300 and the holder body 200.

The tool fastening portion 220 is formed at the opposite end of the second threaded portion 210 in the holder body 200.

Tool fastening unit 220 has a diameter and length that can be fastened to the chuck assembly (see reference numeral '20' of FIG. 6) corresponding to the rotating portion or the impact transmission portion of the power tool used in the hole processing.

For example, the tool fastening part 220 may have a relatively small diameter compared to the second stepped part 230 so as to be fastened to the chuck assembly 20 of the power tool.

In addition, the tool fastening unit 220 may be manufactured based on a standard part size that may be mounted on various electric drill products.

The second stepped part 230 is integrally formed between the tool fastening part 220 and the second threaded part 210 in the holder body 200.

A plurality of smooth surfaces 232 are formed on the outer circumferential surface of the second stepped portion 230 of the holder body 200.

Therefore, since the assembly tool can also be brought into close contact with the smooth surface 132 of the second stepped portion 230, the holder body 200 of the cylindrical shape can be easily coupled to the hollow body 300, or maintenance And it is possible to separate the holder body 200 from the hollow body 300 for parts replacement.

The hollow body 300 may be formed of the same material as the punch body 100 or the holder body 200, or may be formed of any one of a metal material, an alloy material, and an engineering plastic material.

The hollow body 300 is screwed to be detachably assembled to the second threaded portion 210 of the holder body 200 and the first threaded portion 120 of the punch body 100.

That is, female threads 302 that can be screwed to male threads of the first threaded portion 120 or the second threaded portion 210 are formed on the inner peripheral surfaces of both ends of the hollow body 300, respectively.

The inner region of the hollow body 300 in which the female screw 302 is not formed is formed corresponding to the shape and size of the extension 520 of the inner block 500.

For example, the inner region of the hollow body 300 may be formed as a relatively smooth inner circumferential surface than the outer surface of the hollow body 300.

In addition, when the end surface of the first threaded portion 120 of the punch body 100 is screwed to the hollow body 300, the inner block 500 serves to stop the separation to the outside of the punch body 100 Can be in charge of

The hollow body 300 has an internal space connected to each other and the internal space of the punch body 100 through the screw coupling.

In addition, the hollow body 300 has a smooth inner circumferential surface to serve to guide the movement of the inner block 500, while providing a storage space of the elastic body 400 and the inner block 500.

Here, the smooth inner circumferential surface can be formed by precision machining.

For example, the smooth inner circumferential surface may be a surface having a very uniform and smooth surface roughness such as an arithmetic mean roughness of 0.02 to 0.1 μm, a cutoff value of 0.025 mm, an evaluation length of 1.25 mm, and the like.

Such surface roughness may be applied to the inner circumferential surface of the punch body 100 and the outer surface of the inner block 500, respectively.

The hollow body 300 having a smooth inner circumferential surface secures a clearance for movement with respect to the surface of the inner block 500, and in this state, it is possible to minimize the sticking situation during the movement of the inner block 500. Have

To this end, the hollow body 300 may have the same wall thickness over the area for the movement of the inner block 500.

In addition, the hollow body 300 also includes a plurality of smooth surfaces 301 formed on outer peripheral surfaces of both ends thereof.

Since the user can be in close contact with the assembly tool on the smooth surface 301 of the hollow body 300, easy coupling or separation of the punch body 100 or the holder body 200 based on the hollow body 300 of the cylindrical shape. Can be done.

The elastic body 400 is disposed in the inner space of the hollow body 300.

The elastic body 400 may be a compression spring that is compressed by the residue W during the hole processing in the workpiece 30.

When the elastic body 400 separates the power tool from the work object 30 after the hole processing, the elastic body 400 may play a role of pushing and discharging the inner block 500 with elastic force.

The inner block 500 may be disposed to be movable by an external force or an elastic body in the inner space of the hollow body 300 and the inner space of the punch body 100 based on the front position of the elastic body 400.

The inner block 500 may serve to discharge the residue introduced into the inner space of the punch body 100 to the outside of the tool by the elastic force of the elastic body 400.

To this end, this inner block 500 includes a push bar 510 and a extension 520.

The material of the inner block 500 is made of a solid bearing material.

The inner block 500 may be understood as a movable body, a sliding block, a plunger, etc., which can be moved to remove a kind of residue.

Here, the push bar 510 has a diameter corresponding to the inner space of the punch body 100 to maintain the play required for the movement of the inner block 500.

In addition, the push bar 510 may be located in the inner space of the hollow body 300 at the time of coupling to the hollow body 300, and may be moved (eg, backward) toward the elastic body 400 by the residue during the hole processing.

In addition, the extension part 520 is formed integrally with the push bar 510 at the end of the push bar 510 facing the elastic body 400.

The expansion part 520 has a relatively large diameter compared to the push bar 510 and has a diameter slidable in the internal space of the hollow body 300.

In addition, the expansion unit 520 contacts the elastic body 400 to compress the elastic body 400.

An elastic seating groove 522 (see FIG. 3) is formed at the end of the expansion part 520 based on the contact portion of the elastic body 400.

The seating groove 522 is a seating means for holding the end of the elastic body 400, it can exert an effect that can guide the elastic body 400 can be compressed or stretched along the longitudinal direction of the elastic body 400. .

Therefore, according to the compression of the elastic body 400, the restoring force or elastic force generated can be accurately transmitted to the inner block 500, thereby maximizing operating efficiency.

In addition, chamfers 511 and 521 are formed at corner portions of the push bar 510 and the expansion part 520 of the inner block 500.

The chamfers 511 and 521 serve to reduce frictional force due to the movement of the inner block 500, and prevent the edges from being scratched on the inner circumferential surface of each of the hollow body 300 and the punch body 100. It has the advantage of exhibiting a smooth movement of the block 500.

That is, the chamfers 511 and 521 can increase device durability and operating efficiency by removing scratch generating elements on the inner circumferential surface of each of the hollow body 300 and the punch body 100.

3 is a cross-sectional view taken along the line A-A shown in FIG. 1, and FIG. 4 is a cross-sectional view for explaining the operation of discharging residues introduced into the hole processing tool shown in FIG.

Referring to FIG. 3 or 4, an elastic body processed to the same size as the end of the expansion part 520 is supported at the end of the second threaded portion 210 of the holder body 200 based on the contact portion of the elastic body 400. The groove 211 is formed.

Therefore, the elastic body 400 is driven by the force transmitted through the inner block 500 (for example, when the user makes a hole, the residue W is pushed into the punch body 100 due to relative movement). It has the advantage of stable compression and stretching.

Therefore, the inner block 500 has an advantage that can be smoothly reciprocated in the punch body 100 or the hollow body 300 due to the compression or extension of the stable elastic body 400.

According to the assembling method of the hole machining tool 10, the user inserts the push bar 510 of the inner block 500 into the inner space of the punch body 100.

In this state, the user screws the hollow body 300 to the punch body 100.

In this case, the extension 520 of the inner block 500 is disposed in the inner space of the hollow body 300.

And the user puts the elastic body 400 in the inner space of the hollow body (300).

Accordingly, the elastic body 400 is in a position capable of elastically supporting the expansion part 520 in the internal space of the hollow body 300.

Finally, the user screws the holder body 200 to the hollow body 300.

Then, as shown in FIG. 3, before using the power tool, the push bar 510 of the inner block 500 is located in front of the inner space of the punch body 100.

As shown in FIG. 4, the power tool may be used for hole drilling as the user moves the power tool in the direction of drilling the work object.

At this time, the residue W of the workpiece due to the hole processing is introduced into the punch body 100 with a force of a size that can overcome the elastic force of the elastic body 400.

Accordingly, the entire inner block 500 is moved (for example, retracted) in the direction in which the elastic body 400 is compressed in the punch body 100 or the hollow body 300.

As a result, the elastic body 400 has an elastic force or a restoring force by compression.

If the user completes the hole processing, the power tool can be separated or removed from the workpiece.

In this case, the elastic member 400 moves (eg, a battery) the inner block 500 by the elastic force or the restoring force while returning to the original shape, thereby moving the residue W introduced into the punch body 100 into the hole machining tool. Discharge to the outside of (10) and return to the state of FIG.

That is, there is an advantage that the next hole can be processed immediately, and a quick hole working operation can be made.

In addition, after the hole processing tool 10 is moved toward the work object for the hole processing, the step surface 131 of the punch body 100 contacts the work object in the process of approaching the surface of the hole processing site, It has an effect that can serve as a stop jaw to stop the movement of the hole machining tool (10).

That is, the hole processing by the protrusion distance L of the hollow punch unit 110 may be possible.

Hereinafter, the hole processing operation procedure using the hole processing tool 10 is demonstrated.

5 is a view for explaining a drilling operation using the hole machining tool shown in FIG.

Referring to FIG. 5, the user may raise the work guide plate 40 on the work object 30 (see FIG. 5I).

Here, the work object 30 may be a multi-layered insulating material consisting of a plurality of layers or a multi-layer fabric or a single layer.

In addition, the work guide plate 40 may be a thin metal plate having holes marked in advance for convenience of hole processing.

At this time, when the number of holes is small and the position of the holes is not important, the process of placing the work guide plate 40 may be omitted.

The user selects the hole machining tool 10 of the standard corresponding to the work object 30 and mounts it to the chuck assembly 20 of the power tool.

Referring to FIGS. 5 (II) and (III), the user performs the hole work using the power tool and the hole machining tool 10 according to the holes marked on the work guide plate 40.

During the hole processing, the hollow punch portion 110 of the punch body 100 forms a hole in the work object 30.

At this time, the step surface 131 of the punch body 100 may be in contact with the surface of the work guide plate 40, or directly in contact with the surface of the work object 30 when the work guide plate 40 is not used. have.

By the user or by contact with the step surface 131, the movement of the power tool and the hole making tool 10 can be stopped.

At this time, the residue W flows into the internal space of the punch body 100 of the hole machining tool 10.

Due to the inflow of the residues W, the inner block 500 is also moved (eg reversed).

The elastic body 400 is compressed due to the movement of the inner block 500.

Referring to (IV) of FIG. 5, after the hole operation, the hole machining tool 10 is separated from the workpiece 30 by the user.

As a result, a hole is machined into the work object 30 by the drilling depth corresponding to the protrusion distance L described above.

When the hole machining tool 10 is separated from the workpiece 30, the residue W is also moved together with the hole machining tool 10 while flowing into the punch body 100, and the residue W The support base also disappears.

Therefore, in this movement process, the elastic body 400 applies the restoring force (F) to the inner block 500.

That is, the elastic body 400 moves the inner block 500 to the front (for example, the direction from the inside of the punch body 100 to the outside) while being stretched or returned to its original state.

Due to the movement of the inner block 500, the residue W is pushed by the inner block 500 to exit to the outside of the punch body 100.

In this way, the residue W may be separated from the hole processing tool 10 and discharged (for example, a natural fall due to gravity), and may fall into the inside of the unshown container.

In addition, since the inner block 500 is immediately returned to its original position, it is possible to quickly recover the next hole without manually removing a separate residue (W).

As such, the present invention can be easily discharged or separated to the outside automatically without the need to use a separate tool or to perform a separate operation for removing the residue, remaining in the hole machining tool, repeated hole processing It can increase work efficiency and maximize productivity.

In addition, the present invention has the advantage that can be prevented by the user's musculoskeletal disorders, while reducing the work time and productivity by using mounted on a power tool with high portability and operability.

Embodiments of the present invention disclosed in the specification and drawings are only specific examples to easily explain the technical contents of the present invention and aid the understanding of the present invention, and are not intended to limit the scope of the present invention.

Therefore, the scope of the present invention should be construed that all changes or modifications derived based on the technical spirit of the present invention are included in the scope of the present invention in addition to the embodiments disclosed herein.

10 hole drilling tool 100 punch body
200: holder body 300: hollow body
400: elastomer 500: inner block
510: push bar 520: extension

Claims (7)

A punch body having a hollow punch portion formed at one end extending in the tool length direction, a first screw portion formed at the other end, and a first stepped portion integrally formed between the first thread portion and the hollow punch portion;
A holder having a second threaded portion formed at an end facing the first threaded portion, a tool fastened portion formed at an opposite end of the second threaded portion, and a second stepped portion integrally formed between the tool fastened portion and the second threaded portion. Body;
A hollow body screwed to the second threaded portion and the first threaded portion, the hollow body having an inner space connected to the inner space of the punch body;
An elastic body disposed in an inner space of the hollow body; And
And an inner block movably disposed by an external force or an elastic body in the inner space of the hollow body and the inner space of the punch body with respect to the front position of the elastic body.
The method of claim 1,
The punch body,
It includes a step surface formed on the first stepped portion relative to the point connected to the hollow punch portion, so as to have a relatively large area than the end of the hollow punch portion,
And a protrusion distance between the stepped surface of the first stepped portion and the end of the hollow punched portion corresponding to the thickness of the workpiece to be machined.
The method of claim 2,
The punch body,
And a hole machining tool in which the inner spaces of the hollow punch portion, the first stepped portion, and the first threaded portion have the same inner peripheral surface.
The method of claim 1,
The tool fastening portion of the holder body,
And a hole processing tool having a relatively small diameter compared to the second stepped portion so as to be fastened to the chuck assembly of the power tool.
The method of claim 1,
The hollow body,
And an inner circumferential surface for guiding the movement of said inner block, having the same wall thickness over the area for movement of said inner block.
The method of claim 1,
The elastic body,
And a compression spring for pushing out the inner block with elastic force.
The method of claim 3, wherein
The inner block,
A push bar having a diameter corresponding to the inner space of the punch body to maintain the play required for movement of the inner block;
And an extension part formed integrally with the push bar and having a diameter relatively larger than that of the push bar and having a diameter slidable in the inner space of the hollow body and contacting the elastic body.

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