KR20220157593A - A bolt with washer - Google Patents

A bolt with washer Download PDF

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Publication number
KR20220157593A
KR20220157593A KR1020210065310A KR20210065310A KR20220157593A KR 20220157593 A KR20220157593 A KR 20220157593A KR 1020210065310 A KR1020210065310 A KR 1020210065310A KR 20210065310 A KR20210065310 A KR 20210065310A KR 20220157593 A KR20220157593 A KR 20220157593A
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South Korea
Prior art keywords
washer
screw
bolt
incomplete
unit
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KR1020210065310A
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Korean (ko)
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KR102612993B1 (en
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이준배
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주식회사 청우
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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
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
    • F16B39/26—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object with spring washers fastened to the nut or bolt-head
    • 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
    • F16B33/00—Features common to bolt and nut
    • F16B33/02—Shape of thread; Special thread-forms

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bolts, Nuts, And Washers (AREA)

Abstract

The present invention relates to a washer-mounted bolt, and more specifically, to a washer-mounted bolt which has a screw unit (14) formed on the outer circumferential surface of the lower side of a washer accommodating unit (13) in a state in which a washer (15) is inserted in advance into the washer accommodating unit (13) which is spaced apart from the lower surface of a bolt head by a predetermined interval at a shaft unit (12) which is integrally and downwardly extended from the bolt head (11). In order to prevent the washer (15) from being geared with an incomplete screw portion (141), a horizontal in-place screw (16) which protrudes to have an external diameter greater than the external diameter of the incomplete screw portion (141) while being greater than the inner diameter of the washer (15) is formed in the outward direction of the radial direction of the shaft unit (12) at the upper side of the incomplete screw portion (141) at which the screw at the upper end of the screw unit (14) begins. Therefore, even when vibration and impact are caused during the transfer of the washer-mounted bolt, the washer is prevented from being geared with the incomplete screw portion by means of the in-place screw. Accordingly, delay in assembly processes and failures in fastening of the components caused by the bolt due to the interruption caused by the gearing of the washer with the incomplete screw portion of which the height is lower than that of the screw thread of the screw unit may be conveniently and fundamentally resolved, thereby increasing reliability of a product, and improving the product quality of the washer-mounted bolt.

Description

와셔 장착 볼트{A BOLT WITH WASHER}Bolt with washer {A BOLT WITH WASHER}

본 발명은 와셔 장착 볼트에 관한 것으로, 특히 볼트에 미리 조립된 와셔가 볼트에 형성된 나사부의 불완전나사부분과의 간섭을 발생하지 않도록 개선된 구조의 와셔 장착 볼트에 관한 것이다.The present invention relates to a washer mounting bolt, and more particularly, to a washer mounting bolt having an improved structure so that a washer pre-assembled on a bolt does not interfere with an incomplete threaded portion of a threaded portion formed on the bolt.

일반적으로 두 부품을 결합하도록 체결하기 위하여 볼트와 너트가 사용되며, 이때 나사풀림을 방지하고 볼트 헤드나 너트가 받는 하중을 넓게 분산시키기 위해 와셔가 사용되고 있다.In general, bolts and nuts are used to fasten the two parts together, and at this time, washers are used to prevent loosening of the screws and widely distribute the load received by the bolt head or nut.

이러한 볼트와 너트는 특히 자동차 부품의 조립시, 예를들어 트림을 자동차 바디나 샤시에 조립하도록 사용되고 있으며, 이러한 조립작업 현장에서 볼트 체결시에 와셔를 볼트에 끼워서 부품들을 조립하게 되면 부품 조립작업 시간이 많이 소요되어 조립 생산성 향상과 볼트와 와셔의 운송 및 관리를 위해 볼트에 미리 와셔를 끼운 상태의 와셔 장착 볼트를 공급하여 부품 조립시에 단지 너트만 체결하도록 하고 있다.These bolts and nuts are used in particular when assembling automobile parts, for example, to assemble a trim to an automobile body or chassis, and when assembling parts by inserting washers into bolts when fastening bolts at such an assembly work site, parts assembly work time is reduced. In order to improve assembly productivity and transport and manage bolts and washers, bolts with washers pre-installed on bolts are supplied, so that only nuts are fastened when assembling parts.

이러한 와셔 일체형 볼트의 예로서, 한국 공개특허공보 제1995-0025291호(공개일자 1995년09월15일)에는 볼트 헤드와, 이 볼트 헤드와 일체로 된 생크부로 구성된 볼트에 있어서, 상기 생크부가 볼트헤드 쪽의 소직경(d1)의 비나사산부와 대직경(d2)의 나사산부로 구성되고, 소직경의 비나사산부에 이 비나사산부의 직경(d1)보다는 크거나 같고 나사산부의 직경(d2)보다는 작거나 같은 내경(d3)의 와셔가 장착된 것을 특징으로 하는 와셔 장착 볼트가 개시되어 있다.As an example of such a washer-integrated bolt, in Korean Patent Publication No. 1995-0025291 (published on September 15, 1995), in a bolt composed of a bolt head and a shank integral with the bolt head, the shank is a bolt It is composed of a small-diameter (d1) unthreaded portion and a large-diameter (d2) unthreaded portion on the head side, and the small-diameter unthreaded portion is greater than or equal to the diameter (d1) of the unthreaded portion and smaller than the diameter (d2) of the threaded portion. A washer mounting bolt is disclosed, characterized in that a washer having a smaller or equal inner diameter (d3) is mounted.

이러한 와셔 장착 볼트는 소정의 직경으로 된 긴 볼트 소재를 환봉 형태의 볼트 소재로 절단한 다음, 볼트 헤드를 형성하고, 볼트 소재의 생크부에 와셔를 미리 끼운 상태에서 나사산을 가공하여 제조된다.These washer-mounted bolts are manufactured by cutting a long bolt material having a predetermined diameter into a bolt material in the form of a round bar, forming a bolt head, and machining a screw thread with a washer inserted into the shank of the bolt material in advance.

그러나, 볼트에 나사부를 전조가공에 의해 제조하는 과정에서 필연적으로 나사부의 최상단에서 나사가 시작되는 부분은 상대적으로 다른 나사산 보다 직경이 작은 불완전나사부분으로 형성되는데, 도 1과 2에 개략적으로 도시된 바와 같이, 볼트(1)의 헤드(2) 저면측 축부(3)에 와셔(4)가 미리 조립된 상태로 운송되는 동안에 흔들림에 의해 와셔(4)가 경사진 상태로 축부(3)에 형성된 나사부(5) 상단의 불완전나사부분(6)에 맞물리게 되고, 때로는 작업자가 되돌리지 못할 정도로 견고하게 맞물리게 되는 간섭현상이 발생될 수 있으며 이 경우에는 제품 불량으로 취급되어서 발주처에 공급된 제품이 반품되는 사례도 있었다.However, in the process of manufacturing the threaded portion of the bolt by rolling, the portion where the screw starts at the top of the threaded portion is formed as an incomplete threaded portion with a relatively smaller diameter than other threads, schematically shown in FIGS. 1 and 2. As shown, the washer 4 is pre-assembled on the head 2 of the bolt 1 on the bottom side shaft 3, and the washer 4 is tilted by shaking while being transported. Formed on the shaft 3 It engages with the incomplete threaded portion (6) at the top of the screw part (5), and sometimes an interference phenomenon in which the operator is firmly engaged so that it cannot be reversed may occur. In this case, it is treated as a defective product and the product supplied to the ordering party is returned. There were also cases.

그 이유는 와셔(4)가 불완전나사부분(6)에 맞물린 상태의 볼트(1)로 부품을 조립하게 되면, 미리 설정된 체결력을 갖지 못하게 되거나, 조립되는 부품간의 조립 공차가 허용치 보다 크게 되어 조립제품이 조립 불량으로 판정되어 생산성을 저하시키고 재료의 손실이 초래되는 문제가 발생되기 때문이다.The reason is that when parts are assembled with the bolt (1) in which the washer (4) is engaged with the incomplete threaded part (6), the preset fastening force is not obtained, or the assembly tolerance between the parts to be assembled is larger than the allowable value, resulting in an assembled product. This is because it is judged to be an assembly defect, resulting in a decrease in productivity and a problem of material loss.

이에 따라, 와셔 장착 볼트에서 와셔가 볼트의 불완전나사부분에 맞물려 간섭이 발생되는 문제가 발생되지 않도록 하는 근원적인 해결책이 요구되었다. Accordingly, a fundamental solution to prevent the occurrence of interference caused by the washer being engaged with the incomplete screw portion of the bolt in the washer mounting bolt has been required.

한국 공개특허공보 제1995-0025291호(공개일자 1995년09월15일)Korean Patent Publication No. 1995-0025291 (published on September 15, 1995)

본 발명의 목적은 와셔가 미리 장착된 볼트에서의 종래 기술의 문제점을 해결하기 위하여, 와셔가 축부에 미리 조립된 상태로 볼트의 나사부를 전조가공할 때 와셔 하측과 나사부의 상측 사이에 와셔의 내경 보다 크고 나사산의 외경 보다 작은 외경을 갖는 제자리나사를 형성하여 와셔가 불완전나사부분과 맞물림에 의한 간섭이 발생되지 않도록 개선된 와셔 장착 볼트를 제공하는 것이다.An object of the present invention is to solve the problem of the prior art in the bolt with the washer pre-mounted, the inner diameter of the washer between the lower side of the washer and the upper side of the threaded portion when rolling the threaded portion of the bolt in a state where the washer is pre-assembled to the shaft portion. It is an object of the present invention to provide an improved washer mounting bolt by forming a seat screw having a larger outer diameter than the outer diameter of a screw thread so that interference due to engagement of the washer with an incomplete screw portion does not occur.

상기한 목적을 달성하기 위하여, 본 발명에 의한 와셔 장착 볼트는, 볼트 헤드와 일체로 연장된 축부에 볼트 헤드의 저면에서 미리 설정된 소정의 간격으로 이격되어 형성된 와셔수용부에 와셔가 미리 끼워진 상태에서, 와셔수용부 하측의 외주면에 나사부가 형성된 와셔 장착 볼트에 있어서, 상기 와셔가 불완전나사부분과 맞물리는 것을 방지하도록 나사부 상단의 나사가 시작되는 불완전나사부분의 상측에 축부의 반경방향 외측으로 와셔의 내경 보다 크고 불완전나사부분의 외경 보다 큰 외경을 갖도록 돌출된 수평의 제자리나사를 형성한 것을 특징으로 하여 구성된다.In order to achieve the above object, the washer mounting bolt according to the present invention is spaced apart from the bottom of the bolt head at a predetermined distance from the bottom of the bolt head to the shaft part integrally extended with the bolt head. , In the washer mounting bolt having a threaded portion formed on the outer circumferential surface of the lower side of the washer accommodating portion, the washer radially outwardly of the shaft portion on the upper side of the incomplete threaded portion where the screw at the top of the threaded portion begins to prevent the washer from engaging with the incomplete threaded portion of the washer It is configured by forming a protruding horizontal seat screw to have an outer diameter larger than the inner diameter and larger than the outer diameter of the incomplete screw portion.

상기 제자리나사는 나사부의 정상적인 나사산의 외경 보다 작은 외경을 갖고 축부의 반경방향 외측으로 수평으로 돌출되어 형성된다.The seat screw has an outer diameter smaller than that of the normal thread of the threaded portion and is formed to protrude horizontally outward in the radial direction of the shaft portion.

상기 제자리나사는 볼트 헤드와 그 축부 상단의 나사가 형성되지 않는 와셔수용부에 미리 끼워진 와셔를 두개의 대향되게 배치된 전조금형들의 상단에 배치한 상태에서, 상기 전조금형들에서 나사부용의 경사지게 형성된 나사홈 상측에 수평의 제자리나사 성형용의 제자리나사홈이 형성되고, 상기 제자리나사홈의 깊이는 나사홈 보다 깊지 않게 형성된 전조금형들에 의해 성형된다.The seat screw is formed at an angle for the screw portion in the rolling molds in a state where the washer pre-inserted in the bolt head and the washer receiving portion where the screw is not formed at the top of the shaft is disposed on the top of the two opposite rolling molds. An in-situ screw groove for forming a horizontal in-situ screw is formed on the upper side of the screw groove, and the depth of the in-situ screw groove is formed by rolling dies formed not deeper than the screw groove.

본 발명에 의한 와셔 장착 볼트는 나사부 상단의 나사가 시작되는 불완전나사부분의 상측에 축부의 반경방향 외측으로 와셔의 내경 보다 크고 불완전나사부분의 외경 보다 큰 외경을 갖도록 돌출된 수평의 제자리나사를 형성하되, 상기 제자리나사는 정상적인 나사산의 외경 보다 작은 외경을 갖고 축부의 반경방향 외측으로 수평으로 돌출되어 형성됨으로써, 와셔 장착 볼트를 운송하는 동안에 진동과 충격이 발생되더라도 와셔가 제자리나사에 의해 불완전나사부분과 맞물리지 않게 되므로, 종래 와셔가 나사부의 나사산 보다 낮은 높이의 불완전나사부분과 맞물림에 따른 간섭 발생으로 인한 볼트에 의한 부품들의 조립작업 지연 및 체결불량의 문제를 간편하고 근원적으로 해결하는 효과가 있으며, 제품의 신뢰성이 향상되고 와셔 장착 볼트의 품질이 개선되는 효과가 있다. The washer mounting bolt according to the present invention forms a horizontal seat screw protruding to have an outer diameter larger than the inner diameter of the washer and larger than the outer diameter of the incomplete screw part radially outside the shaft part on the upper side of the incomplete screw part where the screw starts at the top of the screw part. However, the seat screw has an outer diameter smaller than the outer diameter of the normal screw thread and is formed by protruding horizontally outward in the radial direction of the shaft portion, so that even if vibration and shock are generated while transporting the washer mounting bolt, the washer is incompletely screwed by the seat screw Since it does not engage with, it is effective to simply and fundamentally solve the problem of delay in assembly work and poor fastening of parts by bolts due to interference caused by engagement of the conventional washer with an incomplete screw part lower than the screw thread of the screw part, The reliability of the product is improved and the quality of the washer mounting bolt is improved.

도 1은 종래 볼트에 와셔가 미리 장착된 상태에서 불완전나사부분에 와셔가 맞물리게 되는 현상을 보여주는 개략적인 단면도.
도 2는 도 1의 와셔가 불완전나사부분에 맞물린 상태를 보여주는 확대도.
도 3은 본 발명에 의한 와셔 장착 볼트의 개략적인 단면도.
도 4는 도 3의 부분확대도로서, 볼트의 나사부 상단의 불완전나사부분 위로 와셔의 이동을 저지하기 위한 제자리나사가 형성된 상태를 보여준다.
도 5는 본 발명에 의한 와셔 장착 볼트를 다이스에서 전조가공하여 제조하는 것을 보여주는 개략적인 사시도.
도 6은 도 5의 정면에서 본 개략적인 단면도.1 is a schematic cross-sectional view showing a phenomenon in which a washer is engaged with an incomplete screw portion in a state in which a washer is pre-mounted on a conventional bolt.
2 is an enlarged view showing a state in which the washer of FIG. 1 is engaged with an incomplete screw portion;
Figure 3 is a schematic cross-sectional view of a washer mounting bolt according to the present invention.
4 is a partially enlarged view of FIG. 3, showing a state in which a seat screw is formed to prevent the movement of the washer over the incomplete threaded portion of the upper end of the threaded portion of the bolt.
Figure 5 is a schematic perspective view showing the production of the washer mounting bolt according to the present invention by rolling in a die.
6 is a schematic cross-sectional view of FIG. 5 viewed from the front;

이하에서는 본 발명의 실시예를 도시한 첨부 도면을 참고하여 본 발명을 보다 상세히 설명하기로 한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings showing embodiments of the present invention.

도 3과 4에 있어서, 본 발명에 의한 와셔 장착 볼트(10)는 볼트 헤드(11)와 일체로 연장된 축부(12)에는 볼트 헤드의 저면에서 소정의 간격으로 이격된 와셔수용부(13)가 형성되고, 와셔수용부(13) 하측의 외주면에 나사부(14)가 형성되고, 상기 볼트 헤드(11)의 저면과 나사부(14) 사이에 와셔(15)가 미리 끼워진 상태로 제조되어 운송 및 공급된다.3 and 4, the washer mounting bolt 10 according to the present invention has a washer receiving portion 13 spaced apart from the bottom of the bolt head at a predetermined interval in the shaft portion 12 integrally extended with the bolt head 11 Is formed, a threaded portion 14 is formed on the outer circumferential surface of the lower side of the washer receiving portion 13, and the washer 15 is manufactured in a state in which it is pre-fitted between the bottom surface of the bolt head 11 and the threaded portion 14 to transport and are supplied

이때, 와셔 장착 볼트(10)의 운송과정에서 와셔(15)가 와셔수용부(13)에서 일탈하여 축부(12)에서 빠지지 않아야 하며, 이를 위하여 상기 나사부(14) 상단, 즉 나사부(14)에서 나사가 시작되는 불완전나사부분(141)의 상측에 축부(12)의 반경방향 외측으로 링 형태로 돌출된 제자리나사(16)가 형성된다. At this time, in the process of transporting the washer mounting bolt 10, the washer 15 should not deviate from the washer accommodating part 13 and fall out of the shaft part 12. A set screw 16 protrudes in a ring shape outward in the radial direction of the shaft portion 12 on the upper side of the incomplete screw portion 141 where the screw starts.

상기 나사부(14)는 나사산이 나선형으로 소정의 각도로 축부(12)의 외주면에 형성되는 반면, 상기 제자리나사(16)는 나사부(14) 상단에서 이격된 위치에 독립적으로 경사지지 않고 링 형태로 반경방향 외측으로 돌출되어 형성된다. The screw part 14 is formed on the outer circumferential surface of the shaft part 12 at a predetermined angle in a spiral shape, while the seat screw 16 is formed in a ring shape without independently inclining at a position spaced apart from the upper end of the screw part 14. It is formed by protruding outward in the radial direction.

상기 불완전나사부분(141)은 축부(12) 외주면에 나사를 전조가공함에 있어 나사가 시작되는 부분으로 나사 가공시에 필연적으로 발생되는 것으로, 그 외경은 나사부(14)의 나사산(142) 보다 작게 시작되어 점차 증가되어 결국 나사부(14)의 나사산(142)의 정상적인 외경과 동일하게 된다. The incomplete screw part 141 is a part where the screw starts in rolling the screw on the outer circumferential surface of the shaft part 12, and is inevitably generated during screw processing, and its outer diameter is smaller than the screw thread 142 of the screw part 14. It starts and gradually increases until it becomes equal to the normal outer diameter of the thread 142 of the threaded part 14.

이에 대하여, 상기 제자리나사(16)의 외경을 와셔(15)의 내경 보다 크게 형성함으로써, 공장에서 제조되어 이송되는 과정에서 흔들림에 의해 와셔(15)가 제자리나사(16) 밑으로 이탈되지 않게 되어 와셔가 불완전나사부분과 맞물리는 현상이 근원적으로 방지된다. On the other hand, by making the outer diameter of the set screw 16 larger than the inner diameter of the washer 15, the washer 15 is not separated from the bottom of the set screw 16 due to shaking in the process of being manufactured and transported at the factory. The phenomenon that the washer engages with the incomplete screw part is fundamentally prevented.

또한, 제자리나사(16)의 외경이 정상적인 나사산(142)의 외경 보다 크게 될 경우, 나사 체결 깊이가 제자리나사에 의해 제한되어 체결토크가 과도하게 상승되고 부품 체결이 불량으로 되거나 체결되는 부품의 체결홀 주변을 손상시키게 되는 문제가 발생되기 때문에, 상기 제자리나사(16)의 외경을 나사부(14) 상단의 불완전나사부분(141)의 외경 보다 큰 한편, 그 하측의 정상적인 나사산(142)의 외경 보다는 작게 형성함으로써, 상기한 문제점들의 발생이 근원적으로 방지된다.In addition, when the outer diameter of the seat screw 16 is larger than the outer diameter of the normal screw thread 142, the screw fastening depth is limited by the seat screw, so the fastening torque is excessively increased, resulting in poor fastening of parts or fastening of the fastened parts. Since the problem of damaging the periphery of the hole occurs, the outer diameter of the seat screw 16 is larger than the outer diameter of the incomplete screw portion 141 at the upper end of the screw part 14, while the outer diameter of the normal screw thread 142 on the lower side is larger than the outer diameter of the screw thread 142. By forming small, the occurrence of the above problems is fundamentally prevented.

본 발명에 따라 와셔가 축부에 미리 끼워진 상태에서 제자리나사(16)를 형성하는 것은, 도 5와 6에 도시된 바와 같이, 두개의 대향되게 배치된 전조금형(100,100')들의 상단에 볼트 헤드(11)와 그 축부(12) 상단의 나사가 형성되지 않는 와셔수용부(13)에 미리 끼워진 와셔(15)를 배치한 상태에서, 축부(12)에 나사부(14)를 형성하도록 수평의 제자리나사홈(16')과 경사지게 형성된 나사홈(14') 및 불완전나사부분홈(141')이 형성된 전조금형들 사이에 축부(12)가 배치된 상태에서 고정된 전조금형(100)에 대해 대향된 전조금형(100')을 이동시킴으로써 전조금형(100,100')에 의한 나사형성과정에서 제자리나사(16)를 별도의 공정을 거치지 않고 동시에 간편하게 형성하게 된다. 이때, 상기 제자리나사홈(16')의 깊이는 나사홈(14')의 깊이 보다 얕고, 불완전나사부분홈(141')의 깊이 보다는 더 깊게 형성됨으로써, 제자리나사(16)의 외경은 나사부(14)의 외경 보다 작고, 불완전나사부분(141)의 외경 보다 크게 형성된다. According to the present invention, forming the set screw 16 in a state where the washer is pre-fitted to the shaft part is, as shown in FIGS. 5 and 6, the bolt head ( 11) and the washer 15 pre-inserted in the washer accommodating portion 13 at the top of the shaft portion 12, where the screw is not formed, the horizontal seat screw to form the threaded portion 14 on the shaft portion 12 In a state where the shaft portion 12 is disposed between the rolling molds in which the groove 16', the inclined screw groove 14', and the incomplete thread partial groove 141' are formed, they are opposed to the fixed rolling mold 100. By moving the rolling mold 100', the seat screw 16 is easily formed at the same time without going through a separate process in the thread forming process by the rolling molds 100 and 100'. At this time, the depth of the seat screw groove 16' is shallower than the depth of the screw groove 14' and deeper than the depth of the incomplete thread partial groove 141', so that the outer diameter of the seat screw 16 is the screw portion ( 14) is formed smaller than the outer diameter and larger than the outer diameter of the incomplete screw portion 141.

이와 같이 본 발명에 따라 전조금형에서의 나사부를 가공하는 공정에서 제자리나사를 동시에 가공할 수 있게 되므로 와셔가 불완전나사부분과의 간섭 방지를 위한 제자리나사를 추가적인 공수 없이도 간편하게 형성할 수 있게 되고, 나사부 상측에 수평의 제자리나사에 의해 제품의 운송중에 흔들림에 의해 와셔가 제자리나사에 의해 불완전나사부분으로 이동되지 않으므로 종래와 같이 와셔가 불완전나사부분에 맞물리는 간섭현상이 전혀 발생되지 않게 된다. In this way, according to the present invention, since the place screw can be processed simultaneously in the process of processing the thread part in the rolling mold, the place screw can be easily formed without additional labor to prevent the washer from interfering with the incomplete thread part, and the screw part Since the washer is not moved to the incomplete screw part by the position screw due to shaking during transportation of the product by the horizontal set screw on the upper side, the interference phenomenon in which the washer engages the incomplete screw part does not occur at all, as in the prior art.

본 발명은 와셔가 축부에 미리 끼워진 상태의 와셔 장착 볼트에 적용하여 와셔가 나사부 상단의 불완전나사부분에 맞물리는 간섭현상을 방지하도록 이용될 수 있다.The present invention may be applied to a washer mounting bolt in which a washer is pre-fitted to a shaft portion to prevent an interference phenomenon in which the washer is engaged with an incomplete threaded portion at an upper end of a threaded portion.

11 ; 볼트 헤드 12 : 축부
13 : 와셔수용부 14 ; 나사부
15 : 와셔 16 : 제자리나사
141 : 불완전나사부분11; Bolt head 12: shaft
13: washer accommodating part 14; screw part
15: washer 16: set screw
141: incomplete screw part

Claims (3)

볼트 헤드(11)와 일체로 연장된 축부(12)에 볼트 헤드의 저면에서 소정의 간격으로 이격되어 형성된 와셔수용부(13)에 와셔(15)가 미리 끼워진 상태에서, 와셔수용부(13) 하측의 외주면에 나사부(14)가 형성된 와셔 장착 볼트에 있어서,
상기 와셔(15)가 불완전나사부분(141)과 맞물리는 것을 방지하도록 나사부(14) 상단의 나사가 시작되는 불완전나사부분(141)의 상측에 축부(12)의 반경방향 외측으로 와셔(15)의 내경 보다 크고 불완전나사부분(141)의 외경 보다 큰 외경을 갖도록 돌출된 수평의 제자리나사(16)를 형성한 것을 특징으로 하는 와셔 장착 볼트.
In a state where the washer 15 is pre-fitted in the washer accommodating portion 13 formed in the shaft portion 12 integrally extended with the bolt head 11 at a predetermined interval from the bottom surface of the bolt head, the washer accommodating portion 13 In the washer mounting bolt having a threaded portion 14 formed on the outer circumferential surface of the lower side,
To prevent the washer 15 from engaging with the incomplete threaded portion 141, a washer 15 radially outward of the shaft portion 12 on the upper side of the incomplete threaded portion 141 where the screw at the top of the threaded portion 14 starts A washer mounting bolt characterized in that a horizontal seat screw 16 protruding to have an outer diameter larger than the inner diameter of the incomplete screw portion 141 is formed.
 제 1항에 있어서,
상기 제자리나사(16)는 나사부(14)의 정상적인 나사산(142)의 외경 보다 작은 외경을 갖고 축부(12)의 반경방향 외측으로 수평으로 돌출되어 형성된 것을 특징으로 하는 와셔 장착 볼트.
According to claim 1,
The washer mounting bolt, characterized in that the set screw (16) has an outer diameter smaller than the outer diameter of the normal screw thread (142) of the screw part (14) and is formed to protrude horizontally outward in the radial direction of the shaft part (12).
 제 1항 또는 제 2항에 있어서,
상기 제자리나사(16)는 볼트 헤드(11)와 그 축부(12) 상단의 나사가 형성되지 않는 와셔수용부(13)에 미리 끼워진 와셔(15)를 두개의 대향되게 배치된 전조금형(100,100')들의 상단에 배치한 상태에서, 상기 전조금형들에서 나사부(14)용의 경사지게 형성된 나사홈(14') 상측에 수평의 제자리나사 성형용의 제자리나사홈(16')이 형성되고, 상기 제자리나사홈(16')의 깊이는 나사홈(14') 보다 깊지 않게 형성된 전조금형(100,100')들에 의해 성형되는 것을 특징으로 하는 와셔 장착 볼트.
According to claim 1 or 2,
The set screw 16 is formed by two rolling dies 100 and 100' disposed opposite to each other by using a washer 15 pre-inserted in the washer receiving portion 13 where the screw is not formed at the top of the bolt head 11 and the shaft portion 12 thereof. ), in the rolling molds, an in-situ screw groove 16' for forming a horizontal in-situ screw is formed on the upper side of the inclined screw groove 14' for the screw part 14, and the in-situ screw groove 16' is formed, A washer mounting bolt, characterized in that the depth of the threaded groove (16') is formed by rolling dies (100, 100') formed not deeper than the threaded groove (14').
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950025291A (en) 1994-02-15 1995-09-15 권철희 Washer mounting bolt and manufacturing method
KR20080025839A (en) * 2006-09-19 2008-03-24 한국델파이주식회사 Velocity joint of bolt and washer assembly for vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950025291A (en) 1994-02-15 1995-09-15 권철희 Washer mounting bolt and manufacturing method
KR20080025839A (en) * 2006-09-19 2008-03-24 한국델파이주식회사 Velocity joint of bolt and washer assembly for vehicle

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