KR102723510B1 - screws for concrete - Google Patents
screws for concrete Download PDFInfo
- Publication number
- KR102723510B1 KR102723510B1 KR1020210161158A KR20210161158A KR102723510B1 KR 102723510 B1 KR102723510 B1 KR 102723510B1 KR 1020210161158 A KR1020210161158 A KR 1020210161158A KR 20210161158 A KR20210161158 A KR 20210161158A KR 102723510 B1 KR102723510 B1 KR 102723510B1
- Authority
- KR
- South Korea
- Prior art keywords
- screw
- screw portion
- triangular
- round
- perforation
- Prior art date
Links
- 238000005553 drilling Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 239000002023 wood Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
- F16B25/0026—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a hard non-organic material, e.g. stone, concrete or drywall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B15/00—Nails; Staples
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
- F16B23/0023—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially cross-shaped
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
본 발명은 콘크리트 벽면에 나사 고정하는 나사못의 구조를 개선하여 보다 손쉽고 편리하게 고정할 수 있도록 한 콘크리트용 나사못에 관한 것으로, 구체적으로는 전동 드라이버와 결합되는 일자 또는 십자형의 홈이 형성된 헤드부와 상기 헤드부로부터 소정 길이로 연장 형성되어 외면에 나선형 나사를 형성한 나사부로 구성되고, 상기 나사부는 선단에서 부터 순차적으로 전동 드라이버에 의한 나사못의 회전시 콘크리트 벽면을 파쇄하면서 천공하는 천공용 비트를 형성한 천공부와, 나사산이 뾰족한 삼각나사인 삼각나사부와, 나사산이 둥근나사인 둥근나사부가 연속 이루어지며, 외면에 길이방항으로 잔해물 배출홈이 형성된 콘크리트용 나사못에 있어서, 상기 삼각나사부는 상기 천공부의 상부에 형성되고 둥근나사부는 상기 삼각나사부의 상부에 형성되되 삼각나사부는 나사부의 전체 길이 1/3에 걸쳐 형성되고, 둥근나사부는 나사부의 전체 길이 1/2의 길이에 걸쳐 형성되며, 상기 둥근나사부의 나사산은 삼각나사부의 나사산 보다 크게 형성됨을 특징으로 한다. The present invention relates to a screw for concrete, which improves the structure of a screw for fixing a screw to a concrete wall surface to enable easier and more convenient fixing, and more specifically, to a screw for concrete, which comprises a head portion having a straight or cross-shaped groove formed therein to be combined with an electric screwdriver, and a screw portion extending from the head portion to a predetermined length and forming a spiral screw on an outer surface, wherein the screw portion sequentially comprises a perforation portion having a perforation bit formed therein to break and perforate a concrete wall surface when the screw is rotated by an electric screwdriver, a triangular screw portion having a pointed triangular screw thread, and a round screw portion having a round screw thread, and a debris discharge groove formed lengthwise on an outer surface, wherein the triangular screw portion is formed on an upper portion of the perforation portion, and the round screw portion is formed on an upper portion of the triangular screw portion, but the triangular screw portion is formed over 1/3 of the total length of the screw portion, and the round screw portion is formed over a length of 1/2 of the total length of the screw portion, and the threads of the round screw portion are thicker than those of the triangular screw portion. It is characterized by being formed largely.
Description
본 발명은 콘크리트용 나사못에 관한 것으로, 더욱 상세하게는 콘크리트 벽면에 나사 고정하는 나사못의 구조를 개선하여 보다 손쉽고 편리하며 견고하게 고정할 수 있도록 한 콘크리트용 나사못에 관한 것이다. The present invention relates to a screw for concrete, and more specifically, to a concrete screw having an improved structure for fixing a screw to a concrete wall surface, thereby enabling easier, more convenient, and more solid fixing.
일반적으로, 나사못은 전동 드라이버의 회전력을 통해 콘크리트 벽면 또는 나무 등에 나사식으로 고정되어 각종 물건을 고정시키거나 걸 수 있도록 하는 기능을 수행한다. In general, screws are used to fix or hang various objects by screwing them into concrete walls or wood using the rotational force of an electric screwdriver.
이러한 나사못은 통상 전동 드라이버와 결합되는 일자 또는 십자형의 홈이 형성된 헤드부와 상기 헤드부로 부터 소정 길이로 연장 형성되어 외면에 나선형 나사를 형성한 나사부로 구성된다. These screws are usually composed of a head portion having a straight or cross-shaped groove formed therein, which is combined with an electric screwdriver, and a screw portion extending from the head portion to a predetermined length and forming a spiral screw on the outer surface.
상기 나사못을 나무에 박을 때는 일반 드라이버로 회전시켜 고정하게 되지만 콘크리트 벽에 고정할 때에는 전동 드라이버를 사용하여 고정하게 되는 데 이때에는 콘크리트 벽에 먼저 전동드릴로서 구멍을 뚫은 다음 상기 구멍에 플라스틱으로 성형된 쐐기를 박아 넣어 쐐기에 형성된 틈새 사이로 나사못을 박아 조임으로써 나사못을 콘크리트 벽에 고정하게 된다. When the above screw is driven into wood, it is fixed by turning it with a normal screwdriver, but when it is fixed to a concrete wall, it is fixed using an electric screwdriver. In this case, a hole is first drilled in the concrete wall with an electric drill, and then a plastic wedge is driven into the hole, and the screw is driven into the gap formed in the wedge and tightened to fix the screw to the concrete wall.
이와같이 종래 나사못을 콘크리트 벽에 고정할 때에는 상기와 같이 전동드릴로서 구멍을 뚫고 이에 별도로 성형된 쐐기를 박아 넣는 선행작업을 수행하게 되므로 작업이 번거럽고 복잡하며 작업시간이 많이 걸릴 뿐 아니라 별도의 쐐기가 구비되어야 함에 따라 소비자가 나사못의 구입시 쐐기비용을 별도 부담해야 문제점이 있었다.
<선행기술문헌>
공개특허공보 제10-2019-0074179호(2019. 06. 27. 공개)
공개특허공보 제10-2003-0038878호(2003. 05. 17. 공개)
등록실용신안공보 제20-0308009호(2003. 03. 17. 공개) In this way, when fixing a conventional screw to a concrete wall, a preliminary task of drilling a hole with an electric drill and inserting a separately formed wedge into the hole is performed, which is cumbersome and complicated and takes a lot of time. In addition, since a separate wedge must be provided, there is a problem in that the consumer has to pay the cost of the wedge separately when purchasing the screw.
<Prior art literature>
Publication of Patent Publication No. 10-2019-0074179 (Published on June 27, 2019)
Publication of Patent Publication No. 10-2003-0038878 (Published on May 17, 2003)
Utility Model Registration No. 20-0308009 (Published on March 17, 2003)
본 발명의 목적은 상기한 문제점을 해소하는 데 있는 것으로, 콘크리트 나사못의 나사부에 대한 구조를 개량하여 콘크리트 벽면에 나사못을 고정시 별도의 쐐기를 사용하지 않고 전동 드라이버로서 견고하게 한번에 나사 고정이 가능한 콘크리트용 나사못을 제공하는 데 있다. The purpose of the present invention is to solve the above-mentioned problem, and to provide a concrete screw which can be firmly fixed in one go with an electric screwdriver without using a separate wedge when fixing the screw to a concrete wall by improving the structure of the screw portion of the concrete screw.
본 발명은 이러한 목적을 달성하기 위한 수단으로, 전동 드라이버와 결합되는 일자 또는 십자형의 홈이 형성된 헤드부와 상기 헤드부로부터 소정 길이로 연장 형성되어 외면에 나선형 나사를 형성한 나사부로 구성되고, 상기 나사부는 선단에서 부터 순차적으로 전동 드라이버에 의한 나사못의 회전시 콘크리트 벽면을 파쇄하면서 천공하는 천공용 비트를 형성한 천공부와, 나사산이 뾰족한 삼각나사인 삼각나사부와, 나사산이 둥근나사인 둥근나사부가 연속 이루어지며, 외면에 길이방항으로 잔해물 배출홈이 형성된 콘크리트용 나사못에 있어서, 상기 삼각나사부는 상기 천공부의 상부에 형성되고 둥근나사부는 상기 삼각나사부의 상부에 형성되되 삼각나사부는 천공부를 제외한 나사부 길이의 1/3 또는 1/2의 길이로 형성되고, 둥근나사부는 삼각나사부를 제외한 나머지 길이에 형성되며, 상기 둥근나사부의 둥근나사는 삼각나사부의 삼각나사보다 단면적이 보다 크게 형성됨을 특징으로 하는 콘크리트용 나사못을 제공한다.The present invention, as a means for achieving the above object, provides a concrete screw, comprising: a head portion having a straight or cross-shaped groove formed therein to be coupled with an electric screwdriver; and a screw portion extending from the head portion to a predetermined length and forming a spiral screw on an outer surface, wherein the screw portion sequentially comprises a perforation portion having a perforation bit formed therein to perforate a concrete wall while crushing the surface of the wall when the screw is rotated by the electric screwdriver in sequence from a tip end; a triangular screw portion having a pointed triangular screw thread; and a round screw portion having a round screw thread, the screw portion having a longitudinally extending groove for discharging debris is formed on the outer surface thereof, wherein the triangular screw portion is formed in an upper portion of the perforation portion and the round screw portion is formed in an upper portion of the triangular screw portion, wherein the triangular screw portion is formed in a length of 1/3 or 1/2 of the length of the screw portion excluding the perforation portion, and the round screw portion is formed in the remaining length excluding the triangular screw portion, and the round screw of the round screw portion is characterized in that it has a larger cross-sectional area than the triangular screw of the triangular screw portion.
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이와 같은 본 발명의 콘크리트용 나사못은 콘크리트 벽면을 천공부의 천공용 비트가 천공하면서 나사식 삽입이 이루어지는 과정에서 천공부의 상부에 연이어 형성된 삼각나사부의 삼각나사가 콘크리트 벽의 내부에 나사산을 형성하고 이어서 삼각나사부의 나사산보다 큰 둥근나사부의 나사산이 삼각나사산을 파고 들면서 삽입되므로서 나사못의 삽입이 보다 쉽고 또 강하게 압착되면서 삽입되므로서 콘크리트 벽면에 견고하게 고정되는 효과가 있다.
특히, 삼각나사부는 천공부를 제외한 나사부의 길이의 3/1 또는 1/2의 길이에 형성되어 먼저 나사산을 형성하고 상기 삼각나사부를 제외한 나머지 길이에 형성된 보다 큰 단면적의 둥근나사부가 삼각나사산을 파고 들도록 되어 있으므로 콘크리트 나사못을 보다 쉽게 박을 수 있는 장점 또한 있다. In the concrete screw of the present invention, when the drilling bit of the drilling hole drills the concrete wall surface and the screw is inserted, the triangular screw of the triangular screw portion formed continuously on the upper part of the drilling hole forms screw threads on the inside of the concrete wall, and then the screw threads of the round screw portion, which are larger than the screw threads of the triangular screw portion, dig into the triangular screw threads and are inserted, so that the screw is inserted more easily and is inserted while being strongly pressed, so that it has the effect of being firmly fixed to the concrete wall surface.
In particular, the triangular screw portion is formed at a length of 3/1 or 1/2 of the length of the screw portion excluding the perforation, so that the screw threads are formed first, and then the round screw portion with a larger cross-sectional area formed at the remaining length excluding the triangular screw portion digs into the triangular screw threads, so there is also an advantage of being able to drive a concrete screw more easily.
도 1은 본 발명의 예시 사시도
도 2는 본 발명의 정면도
도 3은 본 발명의 종단면도
도 4는 도 3의 "A-A" 선 단면도
도 5는 도 3의 "B" 부 확대단면도
도 6은 도 3의 "C" 부 확대단면도
도 7은 본 발명의 나사못이 순차적으로 고정되는 실시 상태 단면도Figure 1 is an exemplary perspective view of the present invention.
Figure 2 is a front view of the present invention.
Figure 3 is a cross-sectional view of the present invention.
Figure 4 is a cross-sectional view taken along line "AA" of Figure 3.
Figure 5 is an enlarged cross-sectional view of part “B” of Figure 3.
Figure 6 is an enlarged cross-sectional view of the “C” section of Figure 3.
Figure 7 is a cross-sectional view of an embodiment in which the screws of the present invention are sequentially fixed.
이하, 본 발명의 실시 예를 첨부된 도면을 참조하여 본 발명에 따른 동작 및 작용을 이해하는 데 필요한 부분을 중심으로 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings, focusing on parts necessary for understanding the operation and function according to the present invention.
본 명세서에 기재된 실시예와 도면에 도시된 구성은 본 발명의 가장 바람직한 일 실시예에 불과할 뿐이고 본 발명의 기술적 사상을 모두 대변하는 것은 아니므로, 본 출원시점에 있어서 이들을 대체할 수 있는 다양한 변형 예들이 있을 수 있음을 이해하여야 한다.It should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, and that there may be various modified examples that can replace them at the time of filing this application.
본 발명의 실시 예를 설명하면서, 본 발명이 속하는 기술 분야에 익히 알려졌고 본 발명과 직접적으로 관련이 없는 불필요한 기술 내용에 대해서는 본 발명의 요지를 흐리지 않고 더욱 명확한 전달을 위해 설명을 생략한다.When describing embodiments of the present invention, unnecessary technical contents that are well known in the technical field to which the present invention belongs and are not directly related to the present invention are omitted for clearer delivery without obscuring the gist of the present invention.
도 1은 본 발명의 예시 사시도이고, 도 2는 본 발명의 정면도이며, 도 3은 본 발명의 종단면도이고, 도 4는 도 3의 "A-A" 선 단면도이며, 도 5는 도 3의 "B" 부 확대단면도이고, 도 6은 도 3의 "C" 부 확대단면도이며, 도 7은 본 발명의 나사못이 순차적으로 고정되는 실시 상태 단면도이다.FIG. 1 is an exemplary perspective view of the present invention, FIG. 2 is a front view of the present invention, FIG. 3 is a longitudinal cross-sectional view of the present invention, FIG. 4 is a cross-sectional view taken along the line "A-A" of FIG. 3, FIG. 5 is an enlarged cross-sectional view of a portion "B" of FIG. 3, FIG. 6 is an enlarged cross-sectional view of a portion "C" of FIG. 3, and FIG. 7 is a cross-sectional view of an embodiment in which screws of the present invention are sequentially fixed.
도 1 내지 도 7을 참조하면, 본 발명의 콘크리트용 나사못(100)은 전동 드라이버와 결합되는 일자 또는 십자형의 홈(10)이 형성된 헤드부(200)와 상기 헤드부(200)로부터 소정 길이로 연장 형성되어 외면에 나선형 나사를 형성한 나사부(300)로 구성된 것에 있어서, 상기 나사부(300)는 선단에서부터 천공부(310), 나사산이 삼각나사(321)인 삼각나사부(320), 나사산이 둥근나사(331)인 둥근나사부(330)로 이루어진다.Referring to FIGS. 1 to 7, a concrete screw (100) of the present invention comprises a head portion (200) having a straight or cross-shaped groove (10) formed to be coupled with an electric driver, and a screw portion (300) formed to extend from the head portion (200) to a predetermined length and form a spiral screw on an outer surface, wherein the screw portion (300) comprises a perforation portion (310) from the tip, a triangular screw portion (320) having triangular screw threads (321), and a round screw portion (330) having round screw threads (331).
상기 천공부(310)는 전동 드라이버에 의한 나사못(100)의 회전시 콘크리트 벽면을 파쇄하면서 천공하는 부분으로서 천공용 비트(400)가 돌설되어 있다.The above-mentioned perforation part (310) is a part that perforates the concrete wall surface while breaking it when the screw (100) is rotated by an electric driver, and a perforation bit (400) is protruded.
상기 삼각나사부(320)는 천공부(310)에 이어 형성되는 부분으로서 나사산이 뾰족한 삼각나사(321)로 구성되어 천공부(310)에 의해 천공되는 콘크리트 벽면의 내부에 나사홈을 형성하면서 삽입되는 데, 삼각나사부(320)는 나사부(300)의 전체 길이 1/3에 걸쳐 형성되므로 콘크리트 벽면을 천공하는 초기 시작부를 삼각나사에 의해 쉽게 뚫고 들어가게 된다.
즉, 삼각나사부는 나사못을 콘크리트 벽면에 박을 때 보다 쉽게 벽면을 파고 들게 하는 것으로 천공부를 제외한 전체 길이의 1/3 또는 1/2 정도의 길이가 바람직하며, 이보다 더 짧을 경우 나사못의 초기 삽입이 용이하지 않고 이보다 더 긴 경우 삼각나사부로만 벽면에 박히게 되어 견고한 박힘이 감소된다. The above triangular screw portion (320) is a portion formed following the perforation portion (310) and is composed of a triangular screw (321) with sharp screw threads, and is inserted while forming a screw groove in the interior of the concrete wall surface perforated by the perforation portion (310). Since the triangular screw portion (320) is formed over 1/3 of the total length of the screw portion (300), the initial starting point for perforating the concrete wall surface can be easily penetrated by the triangular screw.
That is, the triangular screw part makes it easier to dig into the wall when hammering the screw into the concrete wall, so it is desirable to have a length of about 1/3 or 1/2 of the total length excluding the perforation part. If it is shorter than this, the initial insertion of the screw is not easy, and if it is longer than this, the screw is hammered into the wall only with the triangular screw part, reducing the firmness of the hammering.
또한, 상기 둥근나사부(330)는 나사부(300)의 삼각나사부(320)에 연이은 나머지 길이부분에 형성되는 부분으로 나사산이 둥근나사(331)로 구성되고 삼각나사부(320)에 의해 형성된 콘크리트 내벽면의 나사홈을 더 깊이 압착하면서 견고하게 고정되게 한다.In addition, the round screw portion (330) is formed on the remaining length portion connected to the triangular screw portion (320) of the screw portion (300), and the screw thread is formed as a round screw (331), and the screw groove of the inner concrete wall surface formed by the triangular screw portion (320) is pressed more deeply to secure it firmly.
따라서, 둥근나사부(330)의 나사산은 삼각나사부(320)의 나사산 보다는 단면적이 크게 형성되며, 삼각나사부를 제외한 나머지 길이에 형성되어 보다 견고한 박힘을 가능하게 한다. Accordingly, the screw thread of the round screw portion (330) is formed with a larger cross-sectional area than the screw thread of the triangular screw portion (320), and is formed along the remaining length excluding the triangular screw portion, thereby enabling more secure fastening.
또한, 나사부(300)의 외면에는 전체 길이에 걸쳐 길이방향으로 잔해물 배출홈(500)이 형성되어 콘크리트 벽에 회전 삽입시 파쇄되는 콘크리트 잔해물이 배출되도록 되어 있다. In addition, a debris discharge groove (500) is formed in the longitudinal direction along the entire length of the outer surface of the screw portion (300) so that concrete debris crushed when rotating and inserted into a concrete wall is discharged.
이와 같이 된 본 발명의 나사못(100)을 콘크리트 벽에 고정할 때에는 전동 드라이버를 헤드부(200)의 일자홈 또는 십자홈에 끼워 결합한 상태로 고정하고자 하는 위치에 나사못(100)의 선단 천공부(310)를 가압하면서 전동 드라이버를 회전시키면 전동 드라이버의 회전력에 의해 천공부(310)의 비트(400)가 콘크리트를 파쇄하면서 천공하게 되고(도 7의 가) 이어서 천공부(310)에 연이어 설치된 삼각나사부(320)의 나사산이 콘크리트 벽의 내부에 나사산을 형성하면서 회전 삽입이 이루어지게 되며(도 7의 나), 또 이어 설치된 둥근나사부(330)의 둥근나사(331)가 삼각나사부(320)의 나사산에 의해 형성된 나사홈을 더 깊이 파고 들면서 전진하게 되므로 선단의 천공부(310)와 연결된 삼각나사부(320)는 벽의 내부에 나사식으로 결합됨과 동시에 삼각나사(321)보다 큰 단면적을 가진 둥근나사부(330)는 삼각나사부(320)의 나사산에 의해 형성된 나사홈을 더 깊이 파고 들어 압착된 상태로 고정된다.(도 7의 다)When fixing the screw (100) of the present invention to a concrete wall, the electric driver is inserted into the straight or cross groove of the head (200) and the tip perforation (310) of the screw (100) is pressed at the location to be fixed while rotating the electric driver, so that the bit (400) of the perforation (310) breaks the concrete and perforates it by the rotational force of the electric driver (Fig. 7A). Then, the screw thread of the triangular screw portion (320) installed in succession to the perforation (310) forms a screw thread inside the concrete wall and rotational insertion is performed (Fig. 7B). In addition, the round screw (331) of the round screw portion (330) installed in succession advances while digging deeper into the screw groove formed by the screw thread of the triangular screw portion (320), so that the triangular screw portion (320) connected to the tip perforation (310) is screw-coupled inside the wall and at the same time, The round screw part (330) having a larger cross-sectional area than the triangular screw part (321) digs deeper into the screw groove formed by the screw thread of the triangular screw part (320) and is fixed in a compressed state. (Fig. 7)
즉, 삼각나사부(320)의 나사산은 끝이 뾰족한 삼각형상으로 이루어져 나사홈도 삼각형상으로 이루어지게 되는 반면에 둥근나사부(330)의 둥근나사(331)는 최소한 삼각나사산보다는 단면적이 크게 형성되어 있으므로 삼각나사산에 의해 형성된 삼각나사홈을 파쇄시키면서 보다 깊이 파고 들어감에 따라 나사못(100)은 콘크리트 벽면에 매우 견고하게 삽입되어 압착 고정되는 것이다. That is, the screw thread of the triangular screw portion (320) is formed in a sharp triangular shape, so that the screw groove is also formed in a triangular shape, whereas the round screw (331) of the round screw portion (330) is formed with a cross-sectional area at least larger than that of the triangular screw thread, so that the screw nail (100) is inserted very firmly into the concrete wall surface and is press-fixed as it digs in deeper while breaking the triangular screw groove formed by the triangular screw thread.
즉, 둥근나사부(330)의 둥근나사산은 삼각나사부(320)의 삼각나사(321)보다 큰 단면적을 가진 둥근 형태이므로 동일한 크기인 경우에도 보다 넓이가 커서 회전 삽입시 삼각나사홈을 더 깊이 파고 들어가게 된다. That is, the round screw thread of the round screw part (330) has a round shape with a larger cross-sectional area than the triangular screw (321) of the triangular screw part (320), so even if the size is the same, the width is larger and the triangular screw groove is dug deeper when rotated and inserted.
그리고 나사부(300)에는 전체 길이에 걸쳐 길이방향으로 배출홈(500)이 형성되어 있으므로 나사못(100)이 전동 드라이버에 의해 회전되면서 콘크리트 벽을 파고 삽입되는 과정에서 발생되는 콘크리트 파쇄 잔해물의 일부가 천공부(310)에서부터 배출홈(500)을 통해 외부로 배출되므로 잔해물에 의해 나사못(100)의 삽입이 방해를 받지 않고 보다 쉽게 삽입된다. In addition, since the screw portion (300) has a discharge groove (500) formed in the longitudinal direction along the entire length, when the screw (100) is rotated by an electric driver and inserted into a concrete wall, some of the concrete crushing debris generated is discharged to the outside through the discharge groove (500) from the perforation (310), so that the insertion of the screw (100) is not hindered by the debris and is inserted more easily.
이와 같은 본 발명에 따르면 나사못(100)에 순차적으로 형성된 천공부(310)와 삼각나사부(320) 및 둥근나사부(330)에 의해 콘크리트 벽면에 간편하게 고정할 수 있으므로 종래와 같이 별도의 쐐기를 필요로 하지 않고 작업공수도 줄일 수 있으므로 경제적이 효율적이다. According to the present invention, the screw (100) can be easily fixed to a concrete wall surface by the perforation (310), triangular screw portion (320), and round screw portion (330) sequentially formed, so that a separate wedge is not required as in the past, and the work time can be reduced, so it is economically efficient.
10 : 홈 100 : 나사못 200 : 헤드부 300 : 나사부 310 : 천공부 320 : 삼각나사부 321 : 삼각나사 330 : 둥근나사부 331 : 둥근나사 400 : 천공용 비트 500 : 배출홈10: Home 100: Screw 200: Head 300: Screw 310: Drilling hole 320: Triangular screw 321: Triangular screw 330: Round screw 331: Round screw 400: Drilling bit 500: Ejection groove
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