TWM626081U

TWM626081U - Self-tapping screw

Info

Publication number: TWM626081U
Application number: TW110215416U
Authority: TW
Inventors: 陳駿彥
Original assignee: 世豐螺絲股份有限公司
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-04-21

Abstract

一種自攻螺絲，用以解決螺合於木質複合材料的屑料不易排除與平整度的問題。係包含：一桿體，該桿體具有一上段部與一下段部，該上段部具有一帽頭，形成該下段部的端部具有一螺入端；一第一螺紋，具有數個橢圓螺牙並位於該桿體的下段部，該第一螺紋由該螺入端往該帽頭的方向沿伸；及一第二螺紋，具有數個抗拉螺牙並位於該桿體的上段部，該第二螺紋由該第一螺紋的末端往該帽頭的方向沿伸，該第二螺紋與該第一螺紋的螺紋方向相反。A self-tapping screw is used to solve the problems of difficult removal and flatness of scraps screwed into wood composite materials. The system includes: a rod body, the rod body has an upper section and a lower section, the upper section has a cap head, and the end forming the lower section has a screw-in end; a first thread has several elliptical threads The thread is located on the lower section of the rod body, and the first thread extends from the screw-in end to the direction of the cap head; and a second thread, which has several tensile threads and is located on the upper section of the rod body, The second thread extends from the end of the first thread toward the direction of the cap head, and the second thread is opposite to the thread direction of the first thread.

Description

自攻螺絲Self-tapping screws

本創作係關於一種自攻螺絲，尤其是一種能快速螺合於木質複合材料及順利排除屑料使複合材料表面平整的自攻螺絲。This creation is about a self-tapping screw, especially a self-tapping screw that can quickly screw into wood composite materials and smoothly remove chips to make the surface of the composite material flat.

木材因為具有保溫、調節濕氣等實用特性且擁有獨特的木紋與舒適的觸感而成為被廣泛使用的自然建材，然而，隨著近年來環保意識的抬頭，許多國家開始嚴格禁止砍伐樹木，造成木材的供應量逐漸無法支持所需，也因此促成許多種類的木質複合材料陸續被研發並產出，例如：纖維木材或塑膠木材等，期望能代替傳統木材在建築業及裝潢業中的應用。惟，利用習知的自攻螺絲螺合木質複合材料時，螺牙旋入過程中所產生的屑料無法順利排除而堆積於穴孔中，不僅造成螺合效果不佳，且導致該自攻螺絲的帽頭無法貼近於被螺合的木質複合材料表面，而降低了產品的美感。Wood has become a widely used natural building material because of its practical properties such as heat preservation and moisture regulation, as well as its unique wood grain and comfortable touch. However, with the rise of environmental protection awareness in recent years, many countries have begun to strictly prohibit the felling of trees. As a result, the supply of wood is gradually unable to support the demand, and as a result, many types of wood composite materials have been developed and produced, such as fiber wood or plastic wood, which are expected to replace traditional wood in the construction and decoration industries. . However, when the conventional self-tapping screw is used to screw the wood composite material, the scraps generated during the screwing process cannot be removed smoothly and accumulate in the hole, which not only causes the poor screwing effect, but also causes the self-tapping. The head of the screw cannot be close to the surface of the wood composite material to be screwed, which reduces the aesthetics of the product.

有鑑於此，習知的自攻螺絲確實仍有加以改善之必要。In view of this, it is still necessary to improve the conventional self-tapping screws.

為解決上述問題，本創作的目的是提供一種自攻螺絲，係可以使螺合於木質複合材料時產生的屑料順利地排出者。In order to solve the above problems, the purpose of this creation is to provide a self-tapping screw, which can smoothly discharge the scraps generated when screwing on the wood composite material.

本創作的次一目的是提供一種自攻螺絲，係可以對被螺合物提供足夠的切削力及破壞力者。The second purpose of this creation is to provide a self-tapping screw, which can provide sufficient cutting force and destructive force to the screw.

本創作的又一目的是提供一種自攻螺絲，係可以加速攻鑽速度者。Another purpose of this creation is to provide a self-tapping screw, which can accelerate the speed of tapping and drilling.

本創作的再一目的是提供一種自攻螺絲，其帽頭係可以貼近於被螺合的木質複合材料表面而形成平齊者。Another object of the present creation is to provide a self-tapping screw, the head of which can be close to the surface of the screwed wood composite material to form a flush one.

本創作全文所述方向性或其近似用語，例如「前」、「後」、「左」、「右」、「上（頂）」、「下（底）」、「內」、「外」、「側面」等，主要係參考附加圖式的方向，各方向性或其近似用語僅用以輔助說明及理解本創作的各實施例，非用以限制本創作。The directional or similar terms described in the full text of this creation, such as "front", "back", "left", "right", "up (top)", "down (bottom)", "inside", "outside" , "sideways", etc., mainly refer to the directions of the attached drawings, and each directional or similar terms are only used to assist the description and understanding of the various embodiments of the present creation, and are not intended to limit the present creation.

本創作全文所記載的元件及構件使用「一」或「一個」之量詞，僅是為了方便使用且提供本創作範圍的通常意義；於本創作中應被解讀為包括一個或至少一個，且單一的概念也包括複數的情況，除非其明顯意指其他意思。The use of the quantifier "a" or "an" for the elements and components described in the full text of this creation is only for the convenience of use and to provide the general meaning of the scope of this creation; in this creation, it should be construed as including one or at least one, and a single The concept of also includes the plural case unless it is obvious that it means otherwise.

本創作全文所述「結合」、「組合」或「組裝」等近似用語，主要包含連接後仍可不破壞構件地分離，或是連接後使構件不可分離等型態，係本領域中具有通常知識者可以依據欲相連之構件材質或組裝需求予以選擇者。Similar terms such as "combination", "combination" or "assembly" mentioned in the whole text of this work mainly include the types of components that can be separated without destroying the components after connection, or the components cannot be separated after being connected, which are common knowledge in this field. It can be selected according to the material of the components to be connected or the assembly requirements.

本創作的自攻螺絲，包含：一桿體，該桿體具有一上段部與一下段部，該上段部具有一帽頭，形成該下段部的端部具有一螺入端；一第一螺紋，具有數個橢圓螺牙並位於該桿體的下段部，該第一螺紋由該螺入端往該帽頭的方向沿伸；及一第二螺紋，具有數個抗拉螺牙並位於該桿體的上段部，該第二螺紋由該第一螺紋的末端往該帽頭的方向沿伸，該第二螺紋與該第一螺紋的螺紋方向相反。The self-tapping screw of this creation includes: a rod body, the rod body has an upper section and a lower section, the upper section has a cap head, and the end forming the lower section has a screw-in end; a first thread , has several elliptical threads and is located in the lower section of the rod body, the first thread extends from the screw-in end to the direction of the cap head; and a second thread has several tensile threads and is located in the In the upper section of the rod body, the second thread extends from the end of the first thread to the direction of the cap head, and the second thread is opposite to the thread direction of the first thread.

據此，本創作的自攻螺絲，可以藉由該桿體下段部的各該橢圓螺牙提供足夠的切削力及破壞力對木質複合材料進行攻鑽，並利用該桿體上段部的各該抗拉螺牙將各該橢圓螺牙攻鑽過程中旋起的屑料向下擠壓回木質複合材料中，使該第二螺紋的周圍被屑料包圍以提升該自攻螺絲的抗拉強度，如此，該自攻螺絲能更加穩固的結合於木質複合材料中。Accordingly, the self-tapping screw of the present invention can provide sufficient cutting force and destructive force to the wood composite material by using each of the elliptical threads on the lower section of the rod body, and use each of the The tensile thread squeezes the scraps that are spun up during the tapping and drilling process of each elliptical thread back into the wood composite material, so that the second thread is surrounded by scraps to improve the tensile strength of the self-tapping screw , in this way, the self-tapping screw can be more firmly combined with the wood composite material.

其中，該帽頭的底表面可以具有一凹陷部。如此，當該帽頭接近被螺合物時，該凹陷部可以收壓局部無法順利排除的屑料，具有使該帽頭貼近被螺合物的表面的功效。Wherein, the bottom surface of the cap head may have a concave portion. In this way, when the cap head is close to the screwed object, the concave portion can press the scraps that cannot be removed smoothly locally, and has the effect of making the cap head close to the surface of the screwed object.

其中，該第一螺紋鄰近該螺入端的部位可以具有一排屑槽，該排屑槽可以沿各該橢圓螺牙形成一凹陷的溝槽。如此，可以將攻鑽過程中產生的屑料迅速排出，具有避免屑料累積於該第一螺紋處的功效。Wherein, the portion of the first thread adjacent to the screw-in end may have a chip removal groove, and the chip removal groove may form a concave groove along each of the elliptical threads. In this way, the chips generated during the drilling process can be quickly discharged, which has the effect of preventing the chips from accumulating at the first thread.

其中，該帽頭的底表面可以具有數切削部，該數切削部可以突出在該帽頭外周面的下緣。如此，可以將被螺合物的表面切削、磨除，具有使該帽頭局部沈入至被螺合物中的功效。Wherein, the bottom surface of the cap head may have several cutting parts, and the several cutting parts may protrude from the lower edge of the outer peripheral surface of the cap head. In this way, the surface of the screw compound can be cut and ground, and the cap head can partially sink into the screw compound.

其中，相鄰的二橢圓螺牙之間可以具有一螺距，該螺距可以介於2.06~2.18公厘之間。如此，可以使該自攻螺絲不易崩牙或斷裂，具有提升各該橢圓螺牙之間之結構強度的功效。Wherein, there may be a pitch between two adjacent elliptical threads, and the pitch may be between 2.06 and 2.18 mm. In this way, the self-tapping screw can not be easily chipped or broken, and has the effect of improving the structural strength between the elliptical threads.

其中，各該橢圓螺牙可以具有一頂部及一底部，該頂部與該底部之間可以具有一螺牙高度，該螺牙高度可以順著該第一螺紋的螺紋方向持續變化，該頂部具有至少一高點及至少一低點。如此，可以加速該自攻螺絲的攻鑽，具有提高攻鑽速度的功效。Wherein, each of the elliptical threads may have a top and a bottom, there may be a thread height between the top and the bottom, and the thread height may continuously change along the thread direction of the first thread, and the top has at least one thread height. A high and at least one low. In this way, the tapping and drilling of the self-tapping screw can be accelerated, which has the effect of increasing the tapping and drilling speed.

其中，該至少一高點可以由該桿體向外凸伸一第一牙高，該至少一低點可以由該桿體向外凸伸一第二牙高，該第一牙高可以大於該第二牙高，使該螺牙高度可以由該第一牙高沿該第一螺紋的螺紋方向遞減至該第二牙高，再由該第二牙高沿該第一螺紋的螺紋方向遞增至該第一牙高。如此，該至少一高點可以有效切削被螺合物的結構，且該至少一低點可以快速通過被螺合物，具有提升攻鑽速度的功效。Wherein, the at least one high point can protrude outward from the rod body by a first tooth height, and the at least one low point can protrude outward from the rod body by a second tooth height, and the first tooth height can be larger than the second tooth height Thread height, so that the thread height can decrease from the first thread height to the second thread height along the thread direction of the first thread, and then increase from the second thread height to the second thread height along the thread direction of the first thread. One tooth high. In this way, the at least one high point can effectively cut the structure of the screwed object, and the at least one low point can quickly pass through the screwed object, which has the effect of improving the drilling speed.

其中，各該橢圓螺牙可以順著該第一螺紋的螺紋方向成等角偏轉，使相鄰的二橢圓螺牙相對應的該至少一高點及該至少一低點間可以形成一旋角。如此，可以避免攻鑽時所產生的切削應力集中於同一線上，具有降低攻鑽阻力的功效。Wherein, each of the elliptical threads can be equiangularly deflected along the thread direction of the first thread, so that a rotation angle can be formed between the at least one high point and the at least one low point corresponding to two adjacent elliptical threads . In this way, the cutting stress generated during drilling can be avoided from being concentrated on the same line, which has the effect of reducing the resistance of drilling.

其中，各該橢圓螺牙可以具有一切削壁及一連接壁，該切削壁及該連接壁可以分別位於該橢圓螺牙的二側，該切削壁可以朝向該螺入端的方向設置，該連接壁可以朝向該帽頭的方向設置。如此，該切削壁可以破壞被螺合物的結構且該連接壁可以導引攻鑽過程中產生的屑料移動，具有提升該自攻螺絲之破壞力及導引屑料移動的功效。Wherein, each oval thread can have a cutting wall and a connecting wall, the cutting wall and the connecting wall can be respectively located on two sides of the oval thread, the cutting wall can be arranged towards the direction of the screw-in end, and the connecting wall can be Set in the direction of the head of the cap. In this way, the cutting wall can destroy the structure of the screwed material and the connecting wall can guide the movement of the chips generated during the drilling process, which has the effect of enhancing the destructive force of the self-tapping screw and guiding the movement of the chips.

其中，該桿體可以具有一軸向中心線，各該橢圓螺牙可以具有一徑向基準線正交於該軸向中心線，該切削壁與該徑向基準線之間可以夾一第一交角，該第一交角可以介於20~25度之間，該連接壁與該徑向基準線可以夾一第二交角，該第二交角可以介於10~15度之間。如此，可以使該第一交角大於該第二交角，具有提升該自攻螺絲之攻鑽速度及攻鑽流暢度的功效。Wherein, the rod body may have an axial centerline, each of the elliptical threads may have a radial reference line orthogonal to the axial centerline, and a first first line may be sandwiched between the cutting wall and the radial reference line The intersection angle, the first intersection angle may be between 20 and 25 degrees, the connecting wall and the radial reference line may form a second intersection angle, and the second intersection angle may be between 10 and 15 degrees. In this way, the first intersection angle can be made larger than the second intersection angle, which has the effect of improving the tapping and drilling speed and smoothness of tapping and drilling of the self-tapping screw.

為讓本創作之上述及其他目的、特徵及優點能更明顯易懂，下文特舉本創作之較佳實施例，並配合所附圖式作詳細說明；此外，在不同圖式中標示相同符號者視為相同，會省略其說明。In order to make the above-mentioned and other purposes, features and advantages of this creation more obvious and easy to understand, the preferred embodiments of this creation are given below, and are described in detail with the accompanying drawings; in addition, the same symbols are marked in different drawings. are considered to be the same, and their descriptions will be omitted.

請參照第1、3圖所示，其係本創作自攻螺絲的一較佳實施例，係包含一桿體1、一第一螺紋2及一第二螺紋3。該第一螺紋2位於該桿體1的下段部，該第二螺紋3位於該桿體1的上段部。Please refer to Figures 1 and 3, which are a preferred embodiment of the self-tapping screw of the present invention, including a rod body 1 , a first thread 2 and a second thread 3 . The first thread 2 is located at the lower section of the rod body 1 , and the second thread 3 is located at the upper section of the rod body 1 .

該桿體1區分為一上段部與一下段部，該上段部具有一帽頭11，該帽頭11可以在形成該上段部的端部，形成該下段部的端部具有一螺入端12，該帽頭11可用以區動該桿體1旋轉，該帽頭11可以為習知的多邊形帽頭、沈孔帽頭，本創作不予限制，該帽頭11的底表面具有一凹陷部13，該凹陷部13可以是凹陷在該帽頭11底表面的凹槽，在本實施例中，該凹陷部13為一圓弧凹環，當該自攻螺絲的該帽頭11接近被螺合物時，局部無法順利排除的屑料可以被收壓在該凹陷部13中，使該帽頭11可以貼接在該被螺合物的表面。The rod body 1 is divided into an upper section and a lower section, the upper section has a cap head 11 , and the cap head 11 may have a screw-in end 12 at the end forming the upper section and the end forming the lower section. , the cap head 11 can be used to control the rotation of the rod body 1, the cap head 11 can be a conventional polygon cap head, a countersunk cap head, this creation is not limited, the bottom surface of the cap head 11 has a concave part 13. The concave portion 13 can be a groove recessed on the bottom surface of the cap head 11. In this embodiment, the concave portion 13 is an arc concave ring. When the cap head 11 of the self-tapping screw is close to being screwed When the compound is screwed, the scraps that cannot be removed smoothly in part can be compressed in the concave portion 13, so that the cap head 11 can be attached to the surface of the screwed compound.

請參照第3圖所示，該帽頭11的底表面還可以具有數切削部14，該數切削部14可以為尖銳物或刃成突出在該帽頭11外周面的下緣，如此，在該帽頭11的底表面與被螺合物的表面接觸時，可藉由該數切削部14將被螺合物的表面切削、磨除，使該帽頭11可以局部沈入至該被螺合物中，以形成較為密合的外觀。Please refer to FIG. 3 , the bottom surface of the cap head 11 may also have several cutting parts 14 , and the cutting parts 14 may be sharp objects or edges protruding from the lower edge of the outer peripheral surface of the cap head 11 . When the bottom surface of the cap head 11 is in contact with the surface of the screwed object, the surface of the screwed object can be cut and ground by the cutting parts 14, so that the cap head 11 can partially sink into the screwed object. in the compound to form a relatively close appearance.

請參照第1、4圖所示，該第一螺紋2位於該桿體1的下段部，該第一螺紋2由該螺入端12往該帽頭11的方向沿伸；該第一螺紋2具有數個橢圓螺牙21（容後詳述），各該橢圓螺牙21成連續之相連接且環繞於該桿體1的外表面，相鄰的二橢圓螺牙21之間具有一螺距P，該螺距P較佳介於2.06~2.18公厘之間，用以提升各該橢圓螺牙21之間的結構強度，使該自攻螺絲不易崩牙或斷裂。Please refer to Figures 1 and 4, the first thread 2 is located at the lower section of the rod body 1, and the first thread 2 extends from the screw-in end 12 to the direction of the cap head 11; the first thread 2 There are several elliptical threads 21 (to be described in detail later), each of the elliptical threads 21 is connected in a continuous manner and surrounds the outer surface of the rod body 1, and there is a pitch P between two adjacent elliptical threads 21. , the pitch P is preferably between 2.06 and 2.18 mm, which is used to improve the structural strength between the elliptical threads 21, so that the self-tapping screw is not easy to chip or break.

請參照第3、4、5圖所示，各該橢圓螺牙21的左右二側可以分別具有一切削壁22朝向該螺入端12的方向設置，及一連接壁23朝向該帽頭11的方向設置。各該橢圓螺牙21可以具有一徑向基準線S正交於該桿體1的一軸向中心線X，使該切削壁22與該徑向基準線S之間可以夾一第一交角α，該第一交角α較佳介於20~25度之間，該連接壁23與該徑向基準線S可以夾一第二交角β，該第二交角β較佳介於10~15度之間，如此，該切削壁22由於具有較大的斜度，而可以具有較佳的切削效果。另，本實施例可以選擇在該第一螺紋2鄰近該螺入端12的部位設置一排屑槽15（如第1圖所示），該排屑槽15沿各該橢圓螺牙21形成一凹陷的溝槽，如此，斜度較小的該連接壁23可以將攻鑽過程中產生的屑料導引至該排屑槽15，以避免屑料累積於各該橢圓螺牙21之間而影響攻鑽效果。Referring to Figures 3, 4 and 5, the left and right sides of each of the elliptical threads 21 may respectively have a cutting wall 22 disposed in the direction of the screw-in end 12, and a connecting wall 23 disposed in the direction of the cap head 11. set up. Each of the elliptical threads 21 may have a radial reference line S perpendicular to an axial centerline X of the rod body 1, so that a first intersection angle α may be included between the cutting wall 22 and the radial reference line S. , the first intersection angle α is preferably between 20 and 25 degrees, the connecting wall 23 and the radial reference line S can include a second intersection angle β, and the second intersection angle β is preferably between 10 and 15 degrees. In this way, the cutting wall 22 can have a better cutting effect due to its larger inclination. In addition, in this embodiment, a chip removal groove 15 (as shown in FIG. 1 ) can be set at the position of the first thread 2 adjacent to the screwing end 12 , and the chip removal groove 15 forms a chip along each of the elliptical threads 21 . The concave groove, in this way, the connecting wall 23 with a small inclination can guide the chips generated during the drilling process to the chip removal groove 15, so as to prevent the chips from accumulating between the elliptical threads 21. Affects the drill effect.

請參照第4、5圖所示，各該橢圓螺牙21可以分別具有一頂部24及一底部25，該頂部24與該底部25之間具有一螺牙高度H，該頂部24可以具有至少一高點24a及至少一低點24b，使該頂部24順著該第一螺紋2的螺紋方向而與該底部25之間形成不同的螺牙高度H，在本實施例中，該頂部24可以具有相對位設置的二個該高點24a及相對位設置的二個該低點24b，其中，該高點24a與該低點24b可以相互交錯的方式設置。更詳言之，該至少一高點24a可以由該桿體1向外凸伸而形成一第一牙高H1，該至少一低點24b可以由該桿體1向外凸伸而形成一第二牙高H2，該第一牙高H1可以大於該第二牙高H2，使各該橢圓螺牙21的螺牙高度H可以由該第一牙高H1沿該第一螺紋2的螺紋方向遞減至該第二牙高H2，再由該第二牙高H2沿該第一螺紋2的螺紋的方向遞增至該第一牙高H1。如此，該橢圓螺牙21的高點24a可以有效破壞被螺合物的結構且該低點24b可以快速通過該被螺合物，具有提高攻鑽速度及作業效率的作用。Referring to Figures 4 and 5, each of the elliptical threads 21 may have a top 24 and a bottom 25, respectively, a thread height H between the top 24 and the bottom 25, and the top 24 may have at least one The high point 24a and at least one low point 24b make the top 24 follow the thread direction of the first thread 2 to form different thread heights H between the bottom 25 and the top 24. In this embodiment, the top 24 may have The two high points 24a set opposite to each other and the two low points 24b set opposite to each other, wherein the high points 24a and the low points 24b can be set in a staggered manner. More specifically, the at least one high point 24a can protrude outward from the rod body 1 to form a first tooth height H1, and the at least one low point 24b can protrude outward from the rod body 1 to form a first tooth height H1. Second thread height H2, the first thread height H1 can be greater than the second thread height H2, so that the thread height H of each elliptical thread 21 can decrease from the first thread height H1 along the thread direction of the first thread 2 After reaching the second thread height H2 , the second thread height H2 increases to the first thread height H1 along the direction of the thread of the first thread 2 . In this way, the high point 24a of the elliptical thread 21 can effectively destroy the structure of the screwed object, and the low point 24b can quickly pass through the screwed object, which has the effect of improving the drilling speed and operation efficiency.

請參照第5圖所示，各該橢圓螺牙21可以順著該第一螺紋2的螺紋方向成等角偏轉，使相鄰二橢圓螺牙21相對應的各該高點24a及各該低點24b間可以形成一旋角γ，如此，可以避免切削應力集中在同一線上，具有降低攻鑽時所產生之阻力的作用。Referring to FIG. 5, each of the elliptical threads 21 can be equiangularly deflected along the thread direction of the first thread 2, so that each of the high points 24a and the low points of the two adjacent elliptical threads 21 correspond to each other. A rotation angle γ can be formed between the points 24b, in this way, the concentration of cutting stress on the same line can be avoided, which has the effect of reducing the resistance generated during drilling.

請參照第1圖所示，該第二螺紋3位於該桿體1的上段部，該第二螺紋3由該第一螺紋2的末端往該帽頭11的方向沿伸；該第二螺紋3具有數個抗拉螺牙31並與該第一螺紋2的螺紋方向相反，在本實施例中，各該抗拉螺牙31可以凸出於該桿體1的外表面且成連接的環繞該桿體1；各該抗拉螺牙31的螺牙高度H及形狀皆一致，例如但不限制地，各該抗拉螺牙31可以為一圓形螺牙，各該抗拉螺牙31可以將各該橢圓螺牙21攻鑽過程中旋起的屑料向下擠壓回被螺合物中，使該第二螺紋3的周圍被屑料包圍以提升該自攻螺絲的抗拉強度，如此，該自攻螺絲能更加穩固的結合於該被螺合物中。Please refer to FIG. 1, the second thread 3 is located at the upper section of the rod body 1, and the second thread 3 extends from the end of the first thread 2 to the direction of the cap head 11; the second thread 3 There are several anti-tension threads 31 and the thread direction of the first thread 2 is opposite. In this embodiment, each of the anti-tension threads 31 can protrude from the outer surface of the rod Rod body 1; the thread height H and shape of each of the anti-tension threads 31 are the same, for example, but not limited to, each of the anti-tension threads 31 can be a circular thread, and each of the anti-tension threads 31 can be The scraps swirled during the drilling process of each of the elliptical threads 21 are squeezed down into the screw compound, so that the second thread 3 is surrounded by scraps to improve the tensile strength of the self-tapping screw, In this way, the self-tapping screw can be more stably combined in the screwed object.

使用本創作的自攻螺絲時，可以先使該螺入端12接觸被螺合物的表面，並利用該螺入端12在該被螺合物的表面產生鑽孔，用以將該自攻螺絲定位於該被螺合物上，接著便開始對該被螺合物進行攻鑽。各該橢圓螺牙21可以提供足夠的切削力破壞該被螺合物的結構，使該自攻螺絲能夠快速進入該被螺合物中，在攻入過程中產生的屑料則由各該橢圓螺牙21的連接壁23導引至該排屑槽15中，以避免屑料累積於各該橢圓螺牙21之間而影響攻鑽效果；各該抗拉螺牙31可以將旋起的屑料向下擠壓回該被螺合物中，而該帽頭11在接近該被螺合物時可以再由該凹陷部13收容局部無法順利排除的屑料，最後則由該二切削部14將該被螺合物的表面切削、磨除，使該帽頭11可以局部沈入至該被螺合物中，以形成較為密合的外觀。When using the self-tapping screw of the present invention, the screw-in end 12 can be brought into contact with the surface of the object to be screwed, and the screw-in end 12 can be used to generate holes on the surface of the object to be screwed, for the self-tapping. The screw is positioned on the screwed object, and then the tapping and drilling of the screwed object is started. Each of the elliptical threads 21 can provide sufficient cutting force to destroy the structure of the screwed material, so that the self-tapping screw can quickly enter the screwed material, and the chips generated during the tapping process are removed by the elliptical screw. The connecting wall 23 of the screw teeth 21 is guided into the chip removal groove 15 to prevent chips from accumulating between the elliptical screws 21 and affecting the drilling effect; The material is squeezed back into the screwed material, and when the cap head 11 is close to the screwed material, the concave part 13 can receive the scraps that cannot be removed smoothly in part, and finally the two cutting parts 14 The surface of the screw material is cut and ground, so that the cap head 11 can partially sink into the screw material to form a relatively close appearance.

綜上所述，本創作的自攻螺絲，可以藉由該桿體下段部的各該橢圓螺牙提供足夠的切削力及破壞力對木質複合材料進行攻鑽，並利用該桿體上段部的各該抗拉螺牙將各該橢圓螺牙攻鑽過程中旋起的屑料向下擠壓回木質複合材料中，使該第二螺紋的周圍被屑料包圍以提升該自攻螺絲的抗拉強度，如此，該自攻螺絲能更加穩固的結合於木質複合材料中，且該自攻螺絲的該帽頭在接近被螺合物時，該凹陷部可以收容局部無法順利排除的屑料，使該帽頭可以貼接在該被螺合物的表面。To sum up, the self-tapping screw of the present invention can provide sufficient cutting force and destructive force to tap and drill the wood composite material by the elliptical threads of the lower section of the rod body, and use the Each of the anti-tension threads squeezes the scraps spun up during the tapping and drilling process of each of the elliptical threads back down into the wood composite material, so that the periphery of the second thread is surrounded by the scraps to improve the resistance of the self-tapping screw. Tensile strength, in this way, the self-tapping screw can be more firmly integrated into the wood composite material, and when the cap head of the self-tapping screw is close to the screw, the concave part can accommodate the scraps that cannot be removed smoothly locally, The cap head can be attached to the surface of the screwed object.

雖然本創作已利用上述較佳實施例揭示，然其並非用以限定本創作，任何熟習此技藝者在不脫離本創作之精神和範圍之內，相對上述實施例進行各種更動與修改仍屬本創作所保護之技術範疇，因此本創作之保護範圍當包含後附之申請專利範圍所記載的文義及均等範圍內之所有變更。Although the present creation has been disclosed by the above-mentioned preferred embodiments, it is not intended to limit the present creation. Any person skilled in the art can make various changes and modifications relative to the above-mentioned embodiments without departing from the spirit and scope of the present creation. Therefore, the protection scope of this creation shall include all changes within the meaning and equivalent scope recorded in the appended patent application scope.

﹝本創作﹞ 1:桿體 11:帽頭 12:螺入端 13:凹陷部 14:切削部 15:排屑槽 2:第一螺紋 21:橢圓螺牙 22:切削壁 23:連接壁 24:頂部 24a:高點 24b:低點 25:底部 3:第二螺紋 31:抗拉螺牙 H:螺牙高度 H1:第一牙高 H2:第二牙高 M:中心 P:螺距 S:徑向基準線 X:軸向中心線 α:第一交角 β:第二交角 γ:旋角 ﹝This creation﹞ 1: rod body 11: cap head 12: Screw-in end 13: Depressed part 14: Cutting part 15: Chip flutes 2: The first thread 21: Oval thread 22: Cutting Wall 23: Connecting the wall 24: Top 24a: High point 24b: Lows 25: Bottom 3: Second thread 31: Anti-tension thread H: screw height H1: first tooth height H2: Second tooth height M: center P: pitch S: radial reference line X: Axial centerline α: first intersection angle β: Second intersection angle γ: Swivel angle

［第1圖］本創作一較佳實施例的立體圖。［第2圖］本創作一較佳實施例的正面圖。［第3圖］沿第2圖的A-A線剖面圖。［第4圖］第3圖的B局部的放大圖。［第5圖］沿第2圖的C-C線剖面圖。 [Figure 1] A perspective view of a preferred embodiment of the present invention. [Picture 2] The front view of a preferred embodiment of the present invention. [Fig. 3] A cross-sectional view taken along the line A-A in Fig. 2. [Fig. 4] An enlarged view of part B of Fig. 3. [Fig. 5] A cross-sectional view taken along line C-C in Fig. 2.

1:桿體 1: rod body

11:帽頭 11: cap head

12:螺入端 12: Screw-in end

13:凹陷部 13: Depressed part

14:切削部 14: Cutting part

15:排屑槽 15: Chip flutes

2:第一螺紋 2: The first thread

21:橢圓螺牙 21: Oval thread

22:切削壁 22: Cutting Wall

23:連接壁 23: Connecting the wall

24:頂部 24: Top

3:第二螺紋 3: Second thread

31:抗拉螺牙 31: Anti-tension thread

Claims

一種自攻螺絲，包含：一桿體，該桿體具有一上段部與一下段部，該上段部具有一帽頭，形成該下段部的端部具有一螺入端；一第一螺紋，具有數個橢圓螺牙並位於該桿體的下段部，該第一螺紋由該螺入端往該帽頭的方向沿伸；及一第二螺紋，具有數個抗拉螺牙並位於該桿體的上段部，該第二螺紋由該第一螺紋的末端往該帽頭的方向沿伸，該第二螺紋與該第一螺紋的螺紋方向相反。 A self-tapping screw, comprising: a rod body, the rod body has an upper section and a lower section, the upper section has a cap head, and the end forming the lower section has a screw-in end; a first thread with a plurality of elliptical threads located at the lower section of the rod body, the first thread extending from the screw-in end toward the cap head; and A second thread with several tensile threads located on the upper section of the rod body, the second thread extends from the end of the first thread to the direction of the cap head, and the second thread and the first thread The thread direction is opposite.

如請求項1之自攻螺絲，其中，該帽頭的底表面具有一凹陷部。The self-tapping screw of claim 1, wherein the bottom surface of the cap head has a concave portion.

如請求項1之自攻螺絲，其中，該第一螺紋鄰近該螺入端的部位具有一排屑槽，該排屑槽沿各該橢圓螺牙形成一凹陷的溝槽。The self-tapping screw of claim 1, wherein a portion of the first thread adjacent to the screw-in end has a chip removal groove, and the chip removal groove forms a concave groove along each of the elliptical threads.

如請求項1之自攻螺絲，其中，該帽頭的底表面具有數切削部，該數切削部突出在該帽頭外周面的下緣。The self-tapping screw of claim 1, wherein the bottom surface of the cap head has several cutting parts, and the cutting parts protrude from the lower edge of the outer peripheral surface of the cap head.

如請求項1之自攻螺絲，其中，相鄰的二橢圓螺牙之間具有一螺距，該螺距介於2.06~2.18公厘之間。The self-tapping screw of claim 1, wherein, there is a pitch between two adjacent elliptical threads, and the pitch is between 2.06 and 2.18 mm.

如請求項1之自攻螺絲，其中，各該橢圓螺牙具有一頂部及一底部，該頂部與該底部之間具有一螺牙高度，該螺牙高度順著該第一螺紋的螺紋方向持續變化，該頂部具有至少一高點及至少一低點。The self-tapping screw of claim 1, wherein each of the elliptical threads has a top and a bottom, and there is a thread height between the top and the bottom, and the thread height continues along the thread direction of the first thread Variation, the top has at least one high and at least one low.

如請求項6之自攻螺絲，其中，該至少一高點由該桿體向外凸伸一第一牙高，該至少一低點由該桿體向外凸伸一第二牙高，該第一牙高大於該第二牙高，使該螺牙高度由該第一牙高沿該第一螺紋的螺紋方向遞減至該第二牙高，再由該第二牙高沿該第一螺紋的螺紋方向遞增至該第一牙高。The self-tapping screw of claim 6, wherein the at least one high point protrudes outward from the rod body by a first tooth height, the at least one low point protrudes outward from the rod body by a second tooth height, and the first The thread height is greater than the second thread height, so that the thread height decreases from the first thread height along the thread direction of the first thread to the second thread height, and then from the second thread height along the thread of the first thread The direction is incremented to this first tooth height.

如請求項6之自攻螺絲，其中，各該橢圓螺牙順著該第一螺紋的螺紋方向成等角偏轉，使相鄰的二橢圓螺牙相對應的該至少一高點及該至少一低點間形成一旋角。The self-tapping screw of claim 6, wherein each elliptical thread is equiangularly deflected along the thread direction of the first thread, so that the at least one high point and the at least one corresponding to the adjacent two elliptical threads A twist angle is formed between the lows.

如請求項1之自攻螺絲，其中，各該橢圓螺牙具有一切削壁及一連接壁，該切削壁及該連接壁分別位於該橢圓螺牙的二側，該切削壁朝向該螺入端的方向設置，該連接壁朝向該帽頭的方向設置。The self-tapping screw of claim 1, wherein each elliptical thread has a cutting wall and a connecting wall, the cutting wall and the connecting wall are respectively located on two sides of the elliptical thread, and the cutting wall faces the direction of the screw-in end The connecting wall is arranged towards the direction of the cap head.

如請求項9之自攻螺絲，其中，該桿體具有一軸向中心線，各該橢圓螺牙具有一徑向基準線正交於該軸向中心線，該切削壁與該徑向基準線之間夾一第一交角，該第一交角介於20~25度之間，該連接壁與該徑向基準線夾一第二交角，該第二交角介於10~15度之間。The self-tapping screw of claim 9, wherein the shank has an axial centerline, each of the elliptical threads has a radial reference line orthogonal to the axial centerline, and the cutting wall and the radial reference line A first intersection angle is formed between them, and the first intersection angle is between 20 and 25 degrees, and the connecting wall and the radial reference line are formed by a second intersection angle, and the second intersection angle is between 10 and 15 degrees.