KR20080040548A - A wrench bolt - Google Patents

A wrench bolt Download PDF

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Publication number
KR20080040548A
KR20080040548A KR1020070055877A KR20070055877A KR20080040548A KR 20080040548 A KR20080040548 A KR 20080040548A KR 1020070055877 A KR1020070055877 A KR 1020070055877A KR 20070055877 A KR20070055877 A KR 20070055877A KR 20080040548 A KR20080040548 A KR 20080040548A
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KR
South Korea
Prior art keywords
driver
groove
wrench
punch
wrench bolt
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Application number
KR1020070055877A
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Korean (ko)
Inventor
권상덕
Original Assignee
권상덕
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Publication date
Application filed by 권상덕 filed Critical 권상덕
Priority to KR1020070055877A priority Critical patent/KR20080040548A/en
Publication of KR20080040548A publication Critical patent/KR20080040548A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/44—Making machine elements bolts, studs, or the like
    • B21K1/46—Making machine elements bolts, studs, or the like with heads
    • 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
    • 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
    • F16B23/0038—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 prismatic with up to six edges, e.g. triangular, square, pentagonal, Allen-type cross-sections
    • 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
    • F16B23/0092—Specially shaped nuts or heads of bolts or screws for rotations by a tool with a head engageable by two or more different tools
    • 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
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
    • F16B35/06—Specially-shaped heads

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

A wrench bolt manufacturing method and a wrench bolt with a driver groove on the bottom of a wrench groove by a punch are provided to allow the wrench bolt to be driven regardless of wear of a punch for manufacturing the wrench bolt. A manufacturing method of a wrench bolt with a driver groove(2) on the bottom of a wrench groove(1) formed by a punch comprises the steps of: punching a bottom surface of the wrench groove with the punch formed with smaller protrusions than a tip of a driver at the tip; and forming a punch wear marginal groove having a size that the driver can not be inserted.

Description

렌치 볼트의 제조방법 및 렌치볼트{A wrench bolt}Manufacturing method of wrench bolt and wrench bolt {A wrench bolt}

도 1은 렌치볼트의 전체 사시도1 is an overall perspective view of a wrench bolt

도 2는 펀치마모여유홈과 접촉돌기의 제1실시예의 상태도Figure 2 is a state diagram of the first embodiment of the punch wear margin groove and the contact projection

도 3은 도 2의 실시예에서 드라이버를 사용하는 상태도3 is a state diagram using a driver in the embodiment of FIG.

도 4는 펀치마모여유홈과 접촉돌기의 제2실시예의 상태도Figure 4 is a state diagram of a second embodiment of the punch wear margin groove and the contact projection

도 5는 도 4의 실시예에서 드라이버를 사용하는 상태도5 is a state diagram using a driver in the embodiment of FIG.

도 6은 종래의 드라이버홈과 드라이버의 사용 상태도6 is a state diagram used in the conventional driver groove and the driver

※ 도면의 주요 부분에 대한 부호의 설명※ Explanation of codes for main parts of drawing

1 : 렌치홈 2 : 드라이버홈1: Wrench groove 2: Driver groove

3 : 드라이버 4 : 펀치마모여유홈3: driver 4: punch wear free groove

5 : 머리부 6 : 나사부5 head 6 thread

7 : 접촉돌기 8 : 드라이버단부접촉면7: contact protrusion 8: driver end contact surface

본 발명은 렌치볼트의 제조방법과 이에 의해 제조된 렌치볼트에 관한 것으로, 렌치볼트의 머리부에 형성된 렌치홈의 바닥에 펀치로써 드라이버홈을 형성시킬 때 드라이버홈의 바닥 가운데 부분의 일부에 펀치마모여유홈을 더 형성시킴으로, 펀칭에 의해 펀치가 마모되더라도 드라이버의 단부가 드라이버홈의 바닥에 정확하게 접촉될 수 있도록 하여, 드라이버로도 렌치볼트를 사용할 수 있도록 제조하는 렌치볼트의 제조방법과, 상기의 방법으로 제조된 것으로 드라이버홈의 바닥에 드라이버의 단부가 삽입되지 않는 정도의 크기를 가진 펀치마모여유홈이 형성되고, 드라이버홈에 형성된 접촉돌기의 단부 형상이 삼각형의 형상으로 돌출되어 드라이버와의 접촉면적을 증대시킨 렌치볼트에 관한 것이다.The present invention relates to a method for manufacturing a wrench bolt and a wrench bolt manufactured by the present invention, when forming a driver groove by punching the bottom of the wrench groove formed in the head of the wrench bolt punch punch on a portion of the bottom center of the driver groove. By forming a further groove, even if the punch is worn out by punching, so that the end of the driver can be exactly in contact with the bottom of the driver groove, the manufacturing method of the wrench bolt manufactured so that the wrench bolt can also be used as a screwdriver, It is manufactured by the method. Punch wear margin grooves are formed in the bottom of the driver groove so that the end of the driver is not inserted, and the end shape of the contact protrusion formed in the driver groove protrudes in the shape of a triangle to make contact with the driver. The present invention relates to a wrench bolt having an increased area.

렌치볼트는 머리부와 나사부로 구성되고, 머리부에 삼각형, 육각형 등의 다각형의 단면 형상을 가진 렌치홈이 일정 깊이로 형성되어 있다. 이와 같은 렌치볼트는 각종 기계장치는 물론이고 가구 등 그 사용범위가 매우 넓다.Wrench bolt is composed of a head portion and a screw portion, and a wrench groove having a polygonal cross-sectional shape, such as a triangle and a hexagon, is formed at a predetermined depth in the head portion. Such wrench bolts have a wide range of uses such as furniture as well as various machinery.

이와 같은 렌치볼트를 사용하기 위하여 렌치홈에 맞는 렌치를 사용하여 체결하거나 풀어주게 된다. 이와 같이 렌치볼트는 전용의 렌치가 필요하므로, 일반화된 드라이버를 이용하여 렌치볼트를 사용할 수 있는 구조도 개발되어 있다. 즉, 렌치홈의 바닥에 드라이버가 삽입되는 드라이버홈이 형성되어 있다.In order to use such a wrench bolt, a wrench that fits the wrench groove is fastened or released. Since the wrench bolts need a dedicated wrench, a structure has been developed in which a wrench bolt can be used using a generalized screwdriver. That is, the driver groove is formed in the bottom of the wrench groove is inserted into the driver.

상기의 드라이버홈에 드라이버를 삽입하여 사용하는 경우는 정확한 드라이버홈이 형성되어야 드라이버로 렌치볼트를 조이거나 풀 수 있게 된다. 그러나 렌치볼트의 제조상의 문제로 인하여 드라이버와 드라이버홈의 접촉력이 적어 드라이버로 렌치볼트를 사용하기는 매우 어렵게 된다.If the driver is inserted into the driver groove, the correct driver groove must be formed to tighten or loosen the wrench bolt with the driver. However, due to the manufacturing problems of the wrench bolt, it is very difficult to use the wrench bolt as a driver because the contact force between the driver and the driver groove is small.

종래의 렌치볼트에 형성된 드라이버홈은 동일 형상의 펀치로 때려서 형성시켰다. 따라서 펀치가 마모됨에 따라 드라이버홈의 바닥이 뭉게지게 형성되고, 이러한 렌치볼트를 사용할 경우 드라이버가 충분히 삽입되지 않아 드라이버와 드라이버홈의 접촉돌기와의 접촉면적이 현저히 적어져 드라이버가 이탈되는 문제점이 있다. The driver groove formed in the conventional wrench bolt was formed by hitting with a punch of the same shape. Therefore, as the punch is worn, the bottom of the driver groove is formed to be agglomerated, and when the wrench bolt is used, the driver is not sufficiently inserted, so that the contact area between the driver and the contact groove of the driver groove is remarkably reduced, which causes the driver to deviate.

본 발명의 목적은 렌치볼트의 제조상의 문제점을 해소하여 렌치볼트를 드라이버로도 쉽게 사용할 수 있도록 함에 목적이 있다. 즉, 렌치볼트의 드라이버홈의 바닥 중앙에 드라이버의 끝단보다 작은 크기의 펀치마모여유홈을 형성시켜 렌치볼트를 제조하는 방법과, 드라이버홈의 바닥에 펀치마모여유홈이 형성되고, 접촉돌기의 사면이 삼각형의 형상으로 된 렌치볼트를 제공함에 있다.An object of the present invention is to solve the problems in the manufacture of the wrench bolt to make it easy to use the wrench bolt as a screwdriver. That is, a method for manufacturing a wrench bolt by forming a punch wear margin groove having a smaller size than the end of the driver in the center of the bottom of the driver groove of the wrench bolt, and a punch wear margin groove is formed at the bottom of the driver groove, the slope of the contact projection It is to provide a wrench bolt in the shape of this triangle.

본 발명에 의한 렌치 볼트의 제조방법은, 펀치로써 렌치볼트의 렌치홈(1)의 바닥에 드라이버홈(2)을 형성시키는 렌치볼트 제조방법에 있어서, 드라이버(3)의 끝단부보다 작은 돌기가 끝단부에 형성된 펀치를 렌치홈(1)의 바닥면을 펀칭하여, 드라이버(3)가 삽입되지 않는 크기의 펀치마모여유홈(4)을 형성시켜 제조함을 특징으로 한다.Wrench bolt manufacturing method according to the present invention is a wrench bolt manufacturing method for forming a driver groove (2) in the bottom of the wrench groove (1) of the wrench bolt with a punch, the projection smaller than the end of the driver (3) Punch the end formed by punching the bottom surface of the wrench groove (1), characterized in that it is produced by forming a punch wear margin groove (4) of the size that the driver (3) is not inserted.

그리고 본 발명에 의한 렌치볼트는 렌치홈(1)이 형성된 머리부(5)와, 머리부(5)의 하부에 일체로 형성된 나사부(6)로 구성되고, 상기 렌치홈(1)의 바닥에 형 성된 드라이버홈(2)의 측부에 접촉돌기(7)가 다수개 형성된 렌치볼트에 있어서, 드라이버홈(2)의 바닥에 드라이버(3) 끝단이 삽입되지 않는 크기의 펀치마모여유홈(4)이 형성됨을 특징으로 한다.Wrench bolt according to the present invention is composed of a head portion 5, the wrench groove (1) is formed, and a screw portion (6) integrally formed in the lower portion of the head portion 5, the bottom of the wrench groove (1) In the wrench bolt formed with a plurality of contact protrusions (7) formed on the side of the formed driver groove (2), punch wear margin groove (4) of the size that the end of the driver (3) is not inserted into the bottom of the driver groove (2) It is characterized by the formation.

그리고 상기의 접촉돌기(7)의 단부는 두개의 변이 일정 각으로 연결되는 형상으로 삼각형의 돌출부가 형성되어, 드라이버(3)와의 접촉 면적이 증대된 구조를 가진다.The end of the contact protrusion 7 has a structure in which a triangular protrusion is formed in a shape in which two sides are connected at a predetermined angle, and the contact area with the driver 3 is increased.

렌치볼트의 드라이버홈(2)은 펀치로 형성시킨다. 종래의 경우 펀치 단부가 드라이버(3)의 단부와 같은 형상으로 되어 있어, 마모가 진행된 경우에는 드라이버(3)의 단부와 같은 형상으로 홈을 형성시키지 못하고, 뭉게지게 형성시킨다.The driver groove 2 of the wrench bolt is formed by a punch. In the conventional case, the punch end portion has the same shape as the end portion of the driver 3, and when the wear progresses, the groove is not formed in the same shape as the end portion of the driver 3, but formed in a lump.

따라서 도 6에 도시된 바와 같이 드라이버단부접촉면(8)이 완만하게 형성되어, 이에 드라이버(3)를 꼽게 되면, 드라이버(3)가 완전히 꼽히지 못한 상태에서 접촉돌기(7)와 접하게 된다.Accordingly, as shown in FIG. 6, the driver end contact surface 8 is gently formed, and when the driver 3 is plugged in, the driver 3 is in contact with the contact protrusion 7 in a state in which the driver 3 is not fully inserted.

이와 같이 불완전하게 접촉되면, 접촉 면적이 적어지게 되고, 이에 따라 드라이버(3)를 돌릴 때 충분한 힘이 전달되지 못하고, 드라이버(3)가 접촉돌기(7)에서 이탈되는 상황이 된다.In this case, when the incomplete contact is made, the contact area becomes small, whereby a sufficient force is not transmitted when the driver 3 is turned, and the driver 3 is released from the contact protrusion 7.

따라서 렌치볼트의 제조에 있어서, 펀치의 마모가 렌치볼트를 드라이버(3)로 조작할 수 없는 상황을 초래하게 된다.Therefore, in the manufacture of the wrench bolts, wear of the punch causes a situation in which the wrench bolts cannot be operated by the driver 3.

이를 방지하기 위하여 본 발명은 펀치의 단부를 드라이버(3)의 단부보다 작은 돌기를 형성시키고, 이를 이용하여 드라이버홈(2)을 형성시키게 되면, 드라이버홈(2)의 하면은 드라이버단부접촉면(8)을 형성시킴과 동시에, 드라이버단부접촉 면(8)의 가은데 부분에 드라이버(3)가 삽입되지 않는 펀치마모여유홈(4)이 함께 형성된다.In order to prevent this, the present invention forms a projection having a smaller end than the end of the driver 3, and when the driver groove 2 is formed using the same, the lower surface of the driver groove 2 is the driver end contact surface (8) ) And at the same time, a punch wear margin groove 4 in which the driver 3 is not inserted is formed in the center portion of the driver end contact surface 8.

펀치를 사용하여 마모가 진행되더라도, 펀치마모여유홈(4)을 형성시키는 돌기만 마모가 진행된다. 마모된 돌기를 가진 펀치로써 드라이버홈(2)을 펀칭하여 형성시키더라도, 드라이버단부접촉면(8)은 원래의 형상을 유지하고, 단지 펀치마모여유홈(4)의 깊이만 줄어들게 된다.Even though the wear progresses using the punch, only the protrusions forming the punch wear margin grooves 4 progress. Even if the driver groove 2 is formed by punching with a punch having worn protrusions, the driver end contact surface 8 retains its original shape, and only the depth of the punch wear margin groove 4 is reduced.

따라서 이렇게 제조된 렌치볼트라도, 이에 드라이버(3)를 꼽아 사용하면, 드라이버(3)의 끝단부는 정확하에 드라이버단부접촉면(8)에 접하게 되므로, 드라이버(3)와 접촉돌기(7)가 설계된대로의 전체 면적으로 접하게 되어, 드라이버(3)로 용이하게 렌치볼트를 조작할 수 있게 된다.Therefore, even with the wrench bolt manufactured as described above, when the driver 3 is inserted and used, the end portion of the driver 3 is exactly in contact with the driver end contact surface 8, so that the driver 3 and the contact protrusion 7 are designed. By contacting the entire area of the, the screwdriver 3 can easily operate the wrench bolt.

그리고 본 발명은 드라이버(3)와 접촉돌기(7)의 접촉면적을 증대시켜 용이하게 사용할 수 있도록 하는 구조가 제공된다. 즉, 본 발명에 의한 렌치볼트는 접촉돌기(7)의 형상에 특징이 있다. 도 2에 도시된 바와 같이 본 발명의 접촉돌기(7)의 외곽형상은 실선으로 표시되어 있고, 에와 대비가 되도록 종래의 접촉돌기(7)의 외곽 형상이 이점쇄선으로 표시되어 있다.In addition, the present invention provides a structure for increasing the contact area of the driver 3 and the contact protrusion 7 so that it can be easily used. That is, the wrench bolt according to the present invention is characterized by the shape of the contact protrusion 7. As shown in Fig. 2, the outer shape of the contact protrusion 7 of the present invention is indicated by a solid line, and the outer shape of the conventional contact protrusion 7 is indicated by a double-dotted line so as to be contrasted with that of the present invention.

종래의 경우 접촉돌기(7)의 하나의 사면으로 형성되어 있으나, 본 발명은 두개의 사면이 일정 각도를 가지면서 연결되는 삼각형의 형상으로 되어 있다. 이와 같이 삼각형으로 돌출된 부분이 종래보다 넓은 면적을 제공하게 된다. 따라서 도 3과 같이 드라이버(3)가 안전되게 접촉돌기(7)와 접하게 되므로, 드라이버(3)와 접촉돌기(7)의 충격이나 마모없이 작용하고, 접촉면적이 작어 드라이버(3)가 이탈되 는 문제를 해소하게 된다. 뿐만 아니라 드라이버(3)의 단부가 펀치마모여유홈(4)에 의하여 최대한 깊게 삽입되므로 상기의 접촉면적은 보다 용이하게 확보된다.In the conventional case is formed with one slope of the contact projections 7, the present invention is in the shape of a triangle connected to the two slopes having a predetermined angle. Thus, the protruding portion of the triangle provides a larger area than the conventional one. Therefore, as shown in FIG. 3, the driver 3 safely contacts the contact protrusion 7, so that the driver 3 and the contact protrusion 7 operate without impact or wear, and the contact area is small so that the driver 3 is separated. Will solve the problem. In addition, since the end of the driver 3 is inserted as deep as possible by the punch wear margin groove 4, the contact area is more easily secured.

또한 접촉돌기(7)의 다른 실시예로서, 도 4와 같이 할 수도 있다. 이 경우는 드라이버홈(2)을 상기의 실시예보다 더 깊게 형성시키고, 접촉돌기(7)의 삼각형 사면 중 상부의 사면이 경사가 완만하게 형성됨으로써 접촉돌기(7)가 드라이버(3) 쪽으로 깊게 들어가는 형상이다.In addition, as another embodiment of the contact protrusion 7, it may be as shown in FIG. In this case, the driver groove 2 is formed deeper than the above embodiment, and the upper slope of the triangular slope of the contact protrusion 7 is formed to be inclined so that the contact protrusion 7 deeply faces the driver 3. It is a shape to enter.

이와 같은 형상은 드라이버(3)와의 접촉을 보다 더 확실하게 확보할 수 있는 장점을 가지게 된다. Such a shape has an advantage of more reliably securing contact with the driver 3.

이와 같이 본 발명은 렌치볼트의 제조시에 펀치의 마모가 발생하더라도, 드라이버(3)로써 렌치볼트를 사용함에 영향을 받지 않게 되는 효과가 있다. 그리고 이와 같은 제조방법에 의하여 드라이버(3)는 보다 더 확실하게 접촉돌기(7)와 접촉이 이루어져 용이하게 조작할 수 있게 된다.As described above, the present invention has an effect of not being affected by the use of the wrench bolt as the driver 3 even if the wear of the punch occurs during the manufacture of the wrench bolt. And by the manufacturing method as described above, the driver 3 can be more easily contacted with the contact projection 7 can be easily manipulated.

Claims (3)

펀치로써 렌치볼트의 렌치홈(1)의 바닥에 드라이버홈(2)을 형성시키는 렌치볼트 제조방법에 있어서, 드라이버(3)의 끝단부보다 작은 돌기가 끝단부에 형성된 펀치를 렌치홈(1)의 바닥면을 펀칭하여, 드라이버(3)가 삽입되지 않는 크기의 펀치마모여유홈(4)을 형성시키는 렌치 볼트의 제조방법.In the wrench bolt manufacturing method for forming a driver groove (2) in the bottom of the wrench groove (1) of the wrench bolt as a punch, the wrench groove (1) to form a punch formed in the end of the wrench smaller than the end of the driver (3) Method of manufacturing a wrench bolt to punch the bottom surface of the to form a punch wear margin groove (4) of the size that the driver (3) is not inserted. 렌치홈(1)이 형성된 머리부(5)와, 머리부(5)의 하부에 일체로 형성된 나사부(6)로 구성되고, 상기 렌치홈(1)의 바닥에 형성된 드라이버홈(2)의 측부에 접촉돌기(7)가 다수개 형성된 렌치볼트에 있어서, 드라이버홈(2)의 바닥에 드라이버(3) 끝단이 삽입되지 않는 크기의 펀치마모여유홈(4)이 형성됨을 특징으로 하는 렌치볼트.The head portion 5 having the wrench groove 1 formed therein, and the screw portion 6 formed integrally with the lower portion of the head portion 5, and the side portion of the driver groove 2 formed at the bottom of the wrench groove 1. Wrench bolt formed with a plurality of contact projections (7) in the wrench bolt, characterized in that the punch wear margin groove (4) of the size that the end of the driver (3) is not inserted into the bottom of the driver groove (2). 제 2항에 있어서, 접촉돌기(7)의 단부는 두개의 변이 일정 각으로 연결되는 형상으로 삼각형의 돌출부가 형성되어, 드라이버(3)와의 접촉 면적이 증대된 렌치볼트.3. The wrench bolt according to claim 2, wherein an end portion of the contact protrusion (7) has a triangular protrusion formed in a shape in which two sides are connected at regular angles, thereby increasing the contact area with the driver (3).
KR1020070055877A 2007-06-08 2007-06-08 A wrench bolt KR20080040548A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106050870A (en) * 2016-08-15 2016-10-26 钦州学院 Bolt with crossed threaded end socket
CN106050867A (en) * 2016-08-15 2016-10-26 钦州学院 Easily-screwed bolt with straight-line-shaped thread end head
CN106050860A (en) * 2016-06-27 2016-10-26 无锡迪奥机械有限公司 Novel irregular bolt
KR101989078B1 (en) 2019-03-25 2019-06-13 김찬식 Manufacture mothod of wrench bolt

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106050860A (en) * 2016-06-27 2016-10-26 无锡迪奥机械有限公司 Novel irregular bolt
CN106050870A (en) * 2016-08-15 2016-10-26 钦州学院 Bolt with crossed threaded end socket
CN106050867A (en) * 2016-08-15 2016-10-26 钦州学院 Easily-screwed bolt with straight-line-shaped thread end head
KR101989078B1 (en) 2019-03-25 2019-06-13 김찬식 Manufacture mothod of wrench bolt

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