TWI815704B

TWI815704B - Anti-cracking wood screws and method for forming arc-shaped cutting grooves

Info

Publication number: TWI815704B
Application number: TW111139668A
Authority: TW
Inventors: 林昭圍
Original assignee: 寬仕工業股份有限公司
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-09-11

Abstract

一種防裂木螺絲及其弧形割溝槽的成型方法，該防裂木螺絲包含一螺頭、一螺桿，及至少一弧形割溝槽。該螺桿包括一桿體部及一螺牙部。該至少一弧形割溝槽沿一弧形路徑延伸並穿設該螺牙部。該至少一弧形割溝槽界定出一切削面、一沿徑向與該切削面相間隔的輔助面，及一連接該切削面與該輔助面的槽底面。該切削面與該螺牙部相配合形成一連續的切削刃。該輔助面與該螺牙部相配合形成一連續的輔助刃。該至少一弧形割溝槽沿該弧形路徑彎弧延伸的設計，可以大幅增加容屑之空間，有效提升容屑及排屑能力，進而能降低木材裂材之風險。An anti-cracking wood screw and a method for forming an arc-shaped groove. The anti-cracking wood screw includes a screw head, a screw rod, and at least one arc-shaped groove. The screw includes a rod body and a screw thread part. The at least one arc-shaped cutting groove extends along an arc-shaped path and penetrates the thread portion. The at least one arc-shaped cutting groove defines a cutting surface, an auxiliary surface spaced radially from the cutting surface, and a groove bottom surface connecting the cutting surface and the auxiliary surface. The cutting surface cooperates with the thread portion to form a continuous cutting edge. The auxiliary surface cooperates with the thread portion to form a continuous auxiliary edge. The design of the at least one arc-shaped cutting groove extending in an arc along the arc-shaped path can greatly increase the chip holding space, effectively improve the chip holding and chip removal capabilities, and thereby reduce the risk of wood splitting.

Description

防裂木螺絲及其弧形割溝槽的成型方法Anti-cracking wood screws and method for forming arc-shaped cutting grooves

本發明是有關於一種具割溝槽的木螺絲及該割溝槽的成型方法，特別是指一種具有弧形割溝槽的防裂木螺絲，及該弧形割溝槽的成型方法。The present invention relates to a wood screw with a cutting groove and a method for forming the groove. In particular, it relates to a crack-proof wood screw with an arc-shaped groove and a method for forming the arc-shaped groove.

參閱圖1及圖2，為目前現有的一種木螺絲1，該木螺絲1包含一螺頭11、一由該螺頭11沿軸向延伸的螺桿12，及一開設於該螺桿12上的割溝槽13。該螺桿12包括一個一端連接該螺頭11的桿身段121、一連接於該桿身段121另一端的尖錐段122，及一由該桿身段121以螺旋環繞方式延伸至該尖錐段122的螺牙段123。該割溝槽13由該桿身段121遠離該螺頭11的位置延伸至該尖錐段122末端，並以挖鑿方式穿設該螺牙段123的部分。該木螺絲1在鑽入無預鑽孔的木材時，可透過該割溝槽13切斷木纖維來降低旋入所需之扭力，並達到容置些許被切削之木屑的作用。Referring to Figures 1 and 2, a currently existing wood screw 1 is shown. The wood screw 1 includes a screw head 11, a screw rod 12 extending axially from the screw head 11, and a cutter provided on the screw rod 12. Groove 13. The screw 12 includes a shaft section 121 with one end connected to the screw head 11 , a pointed cone section 122 connected to the other end of the shaft section 121 , and a helically extending from the shaft section 121 to the pointed cone section 122 . Thread section 123. The cutting groove 13 extends from the position of the shaft section 121 away from the screw head 11 to the end of the pointed cone section 122 , and penetrates the part of the screw section 123 in a digging manner. When the wood screw 1 is drilled into wood without pre-drilled holes, the wood fibers can be cut through the cutting groove 13 to reduce the torque required for screwing in, and to accommodate some cut wood chips.

然而，該割溝槽13是以圖2所示外周面設有鋸齒21的圓盤狀刀具2切削該螺牙段123而形成，此種加工方式僅能成型出較小且路徑為筆直延伸的割溝槽13，如此將使得該割溝槽13容屑空間較小，且不具導屑功能而無法將多餘的木屑有效排出，這導致木材會因木屑排出不及而有裂材之風險，且該木螺絲1在切削能力及穩定性上仍有可提升之空間。However, the cutting groove 13 is formed by cutting the thread segment 123 with the disc-shaped tool 2 provided with serrations 21 on the outer circumferential surface as shown in Figure 2. This processing method can only form a smaller groove with a straight path. Cutting the groove 13 will result in a small chip-holding space in the cutting groove 13, and it does not have a chip-guiding function and cannot effectively discharge the excess wood chips. This will lead to the risk of the wood splitting due to insufficient discharge of the wood chips, and the wood chips will not be discharged in time. Wood screw 1 still has room for improvement in terms of cutting ability and stability.

因此，本發明之目的，即在提供一種能提升容屑量、切削能力，及穩定性的防裂木螺絲。Therefore, the object of the present invention is to provide an anti-crack wood screw that can improve chip holding capacity, cutting ability, and stability.

於是，本發明防裂木螺絲，包含一螺頭、一螺桿，及至少一弧形割溝槽。該螺桿包括一連接該螺頭且沿軸向朝遠離該螺頭之方向延伸的桿體部，及一凸設於該桿體部上且沿軸向螺旋延伸的螺牙部。該至少一弧形割溝槽沿一弧形路徑延伸並穿設該螺牙部。該至少一弧形割溝槽穿鑿該螺牙部的至少一部分而界定出一切削面、一沿徑向與該切削面相間隔的輔助面，及一連接該切削面與該輔助面的槽底面。該切削面與該螺牙部相配合形成一連續的切削刃。該輔助面與該螺牙部相配合形成一連續的輔助刃。該槽底面與該桿體部界定出一沿軸向相對靠近該螺頭的第一端緣，及一沿軸向相對遠離該螺頭的第二端緣，該槽底面的寬度不大於該第一端緣或該第二端緣的長度。Therefore, the anti-cracking wood screw of the present invention includes a screw head, a screw rod, and at least one arc-shaped cutting groove. The screw rod includes a rod body connected to the screw head and extending axially away from the screw head, and a thread portion protruding from the rod body and extending spirally along the axial direction. The at least one arc-shaped cutting groove extends along an arc-shaped path and penetrates the thread portion. The at least one arc-shaped cutting groove penetrates at least a portion of the thread portion to define a cutting surface, an auxiliary surface spaced radially from the cutting surface, and a groove bottom surface connecting the cutting surface and the auxiliary surface. The cutting surface cooperates with the thread portion to form a continuous cutting edge. The auxiliary surface cooperates with the thread portion to form a continuous auxiliary edge. The groove bottom surface and the rod body define a first end edge relatively close to the screw head along the axial direction, and a second end edge relatively far away from the screw head along the axial direction. The width of the groove bottom surface is no greater than the third end edge. The length of one end edge or the second end edge.

本發明之另一目的，即在提供如前所述之弧形割溝槽的成型方法。Another object of the present invention is to provide a method for forming arc-shaped grooves as described above.

於是，本發明防裂木螺絲之弧形割溝槽的成型方法，包含一前置步驟，及一切削步驟。在該前置步驟中，準備一刀具，及一待加工螺絲，該刀具包含一呈圓筒狀的筒身，及複數連續設置於該筒身上且彼此環狀排列的鋸刃，該待加工螺絲包含一螺頭，及一螺桿，該螺桿包括一連接該螺頭且沿軸向朝遠離該螺頭之方向延伸的桿體部，及一凸設於該桿體部上且沿軸向螺旋延伸的螺牙部。Therefore, the method for forming arc-cut grooves for anti-cracking wood screws of the present invention includes a pre-step and a cutting step. In this preparatory step, prepare a tool and a screw to be processed. The tool includes a cylindrical barrel body, and a plurality of saw blades continuously arranged on the barrel body and arranged in an annular shape. The screw to be processed It includes a screw head and a screw rod. The screw rod includes a rod body connected to the screw head and extending axially away from the screw head, and a rod protruding from the rod body and extending spirally along the axial direction. The screw thread part.

在該切削步驟中，驅動該刀具旋轉並將該刀具朝該螺桿移動，透過旋轉的該等鋸刃在該螺桿上沿一弧形路徑切削出一弧形割溝槽，該弧形割溝槽穿鑿該螺牙部的至少一部分而界定出一切削面、一沿徑向與該切削面相間隔的輔助面，及一連接該切削面與該輔助面的槽底面，該切削面與該螺牙部相配合形成一連續的切削刃，該輔助面與該螺牙部相配合形成一連續的輔助刃，該槽底面與該桿體部界定出一沿軸向相對靠近該螺頭的第一端緣，及一沿軸向相對遠離該螺頭的第二端緣，該槽底面的寬度不大於該第一端緣或該第二端緣的長度。In the cutting step, the tool is driven to rotate and moved toward the screw, and an arc-shaped cutting groove is cut along an arc-shaped path on the screw through the rotating saw blades. The arc-shaped cutting groove is At least a part of the thread portion is drilled to define a cutting surface, an auxiliary surface spaced radially from the cutting surface, and a groove bottom surface connecting the cutting surface and the auxiliary surface, the cutting surface and the thread portion The auxiliary surface cooperates with the thread portion to form a continuous cutting edge. The groove bottom surface and the rod body portion define a first end edge relatively close to the screw head along the axial direction. , and a second end edge relatively away from the screw head in the axial direction, the width of the groove bottom surface is not greater than the length of the first end edge or the second end edge.

本發明之功效在於：該至少一弧形割溝槽之切削面及其構成的切削刃可在本發明旋入木材中時提供更大的切削面積，大幅增加對於木纖維的切削能力並降低旋入木材時所需的扭力，而該輔助面及其所構成的輔助刃可輔助穩固本發明鎖入時之方向，進而達到減輕施工負擔及提高施工效率的功效。當本發明旋入木材時，木纖維被切斷而形成的木屑可被引導進入該至少一弧形割溝槽後排出，如此可將木屑排出以避免堆積的木屑造成木材裂材，而該至少一弧形割溝槽沿該弧形路徑彎弧延伸的設計，可以大幅增加容屑之空間，有效提升容屑及排屑能力，進而能降低木材裂材之風險。The effect of the present invention is that the cutting surface of the at least one arc-shaped groove and the cutting edge formed by the present invention can provide a larger cutting area when the present invention is screwed into wood, greatly increasing the cutting ability of wood fibers and reducing the rotational speed. The auxiliary surface and the auxiliary blade formed by the auxiliary surface can assist in stabilizing the locking direction of the present invention, thereby reducing the construction burden and improving the construction efficiency. When the present invention is screwed into the wood, the wood chips formed by cutting the wood fibers can be guided into the at least one arc-shaped cutting groove and then discharged, so that the wood chips can be discharged to avoid the accumulated wood chips causing wood splitting, and the at least one The design of an arc-shaped cutting groove extending in an arc along the arc-shaped path can greatly increase the space for chip holding, effectively improve chip holding and chip removal capabilities, and thereby reduce the risk of wood splitting.

在本發明被詳細描述之前，應當注意在以下的說明內容中，類似的元件是以相同的編號來表示。Before the present invention is described in detail, it should be noted that in the following description, similar elements are designated with the same numbering.

參閱圖3、圖4，及圖5，本發明防裂木螺絲之一第一實施例，包含一螺頭3、一連接該螺頭3的螺桿4，及一開設於該螺桿4上且沿一弧形路徑延伸的弧形割溝槽5。該螺桿4包括一連接該螺頭3且沿軸向朝遠離該螺頭3之方向延伸的桿體部41，及一凸設於該桿體部41上且沿軸向螺旋延伸的螺牙部42。該桿體部41具有一個一端連接該螺頭3的桿身段411，及一由該桿身段411之另一端沿軸向朝遠離該螺頭3的方向延伸的尖錐段412。參閱圖3、圖4，及圖6，該弧形割溝槽5沿該弧形路徑由該桿身段411穿設該螺牙部42而延伸至該尖錐段412(但並未延伸至該尖錐段412末端)，且其兩端呈開放狀而分別設有一開口B。該弧形路徑可配合該螺桿4而略微螺旋延伸，在本發明中，該弧形路徑不具反曲點而呈圓弧狀，該弧形路徑的一曲率中心C沿徑向位於該螺桿4之中心軸線D的一側，且其兩端的開口B沿徑向位於該螺桿4之中心軸線D的相同一側，也就是說，該弧形路徑可以如圖3所示的呈左弧態樣，也可以如圖6所示地呈右弧態樣，且該弧形路徑的曲率半徑相同。Referring to Figure 3, Figure 4, and Figure 5, a first embodiment of the anti-cracking wood screw of the present invention includes a screw head 3, a screw rod 4 connected to the screw head 3, and a screw rod 4 that is opened on and along the screw head 3. An arc-shaped cutting groove 5 extends along an arc-shaped path. The screw 4 includes a rod body 41 connected to the screw head 3 and extending in an axial direction away from the screw head 3 , and a thread portion protruding from the rod body 41 and extending spirally along the axial direction. 42. The shaft portion 41 has a shaft section 411 with one end connected to the screw head 3 , and a pointed cone section 412 extending axially away from the screw head 3 from the other end of the shaft section 411 . Referring to Figures 3, 4, and 6, the arc-shaped cutting groove 5 penetrates the thread portion 42 from the shaft section 411 along the arc-shaped path and extends to the pointed cone section 412 (but does not extend to the The end of the pointed cone section 412), and its two ends are open and respectively provided with an opening B. The arc-shaped path can be slightly spirally extended in conjunction with the screw 4. In the present invention, the arc-shaped path does not have an inflection point and is in the shape of a circular arc. A center of curvature C of the arc-shaped path is located radially between the screw 4. One side of the central axis D, and the openings B at both ends are located radially on the same side of the central axis D of the screw 4. That is to say, the arc path can be in the form of a left arc as shown in Figure 3. It can also be in a right arc shape as shown in Figure 6, and the curvature radius of the arc path is the same.

參閱圖7、圖8，及圖9，該弧形割溝槽5穿鑿該螺牙部42的至少一部分而界定出一切削面51、一沿徑向與該切削面51相間隔且彼此相互平行的輔助面52，及一沿徑向連接該切削面51與該輔助面52的槽底面53。該切削面51與該螺牙部42相配合形成一連續的切削刃511，能在本發明旋入木材中時提供更大的切削面積，大幅增加對於木纖維的切削能力並降低旋入木材時所需的扭力。該輔助面52與該螺牙部42相配合形成一連續的輔助刃521，其可輔助穩固本實施例鎖入時之方向，進而達到減輕施工負擔及提高施工效率的功效。該切削面51、該輔助面52，及該槽底面53在軸向上的橫截面會如圖7所示地概呈U字形，可增加用於容置木屑的空間容積。該槽底面53與該螺桿4之中心軸線D平行且沿徑向彼此相間隔，如此可維持本發明整體的結構強度。該弧形路徑的圓心角α小於或等於180度，且該螺牙部42的底徑d與該槽底面53的寬度w之比值控制在1.3至3.3之間，當前述比值小於1.3時，會限縮該切削刃511及該輔助刃521的成型空間，從而降低切削能力及穩定能力，當前述寬度比值大於3.3時，則會大幅降低容屑空間，造成容屑及導屑能力的下降。此外，該槽底面53與該桿身段411相配合界定出一沿軸向相對靠近該螺頭3的第一端緣541，同時該槽底面53也與該桿身段411及該尖錐段412相配合界定出一沿軸向相對遠離該螺頭3的第二端緣542，該槽底面53的寬度w不大於該第一端緣541或該第二端緣542的長度，且該第二端緣542與該螺桿4之中心軸線D的交角β為0至20度。Referring to Figures 7, 8, and 9, the arc-shaped cutting groove 5 penetrates at least a portion of the thread portion 42 to define a cutting surface 51, which is radially spaced apart from the cutting surface 51 and parallel to each other. An auxiliary surface 52, and a groove bottom surface 53 connecting the cutting surface 51 and the auxiliary surface 52 in the radial direction. The cutting surface 51 cooperates with the thread portion 42 to form a continuous cutting edge 511, which can provide a larger cutting area when the present invention is screwed into wood, greatly increase the cutting ability of wood fibers and reduce the time required for screwing into wood. required torque. The auxiliary surface 52 cooperates with the thread portion 42 to form a continuous auxiliary blade 521, which can assist in stabilizing the locking direction of this embodiment, thereby reducing the construction burden and improving the construction efficiency. The cutting surface 51, the auxiliary surface 52, and the groove bottom surface 53 have a U-shaped cross section in the axial direction as shown in Figure 7, which can increase the space volume for accommodating wood chips. The groove bottom surface 53 is parallel to the central axis D of the screw 4 and radially spaced apart from each other, so as to maintain the overall structural strength of the present invention. The central angle α of the arc path is less than or equal to 180 degrees, and the ratio of the bottom diameter d of the thread portion 42 to the width w of the groove bottom surface 53 is controlled between 1.3 and 3.3. When the ratio is less than 1.3, it will The forming space of the cutting edge 511 and the auxiliary edge 521 is limited, thereby reducing the cutting ability and stability. When the width ratio is greater than 3.3, the chip holding space will be greatly reduced, resulting in a decrease in chip holding and chip guiding capabilities. In addition, the groove bottom surface 53 cooperates with the shaft section 411 to define a first end edge 541 relatively close to the screw head 3 in the axial direction. At the same time, the groove bottom surface 53 is also in contact with the shaft section 411 and the pointed cone section 412 . The fit defines a second end edge 542 relatively away from the screw head 3 in the axial direction, the width w of the groove bottom surface 53 is not greater than the length of the first end edge 541 or the second end edge 542, and the second end edge 542 is The intersection angle β between the edge 542 and the central axis D of the screw 4 is 0 to 20 degrees.

參閱圖10至圖13，為本發明防裂木螺絲之一第二實施例，該第二實施例大致上是與該第一實施例相同，不同之處在於：該第二實施例中的防裂木螺絲包含了二沿軸向彼此鄰近設置的弧形割溝槽5，該等弧形割溝槽5的其中之一是由該桿身段411延伸至該尖錐段412，另一個則是形成於該桿身段411上，該等弧形割溝槽5可以如圖10及圖12所示地相互分離設置，也可以如圖11及圖13所示地彼此相互連通。該等弧形割溝槽5的曲率中心C可以如圖11及圖13所示地沿徑向位於該螺桿4之中心軸線D的同一側，使得彼此同為左弧或右弧的態樣，也可以如圖10及圖12所示地沿徑向位於該螺桿4之中心軸線D的相反側，而分別為左弧及右弧的態樣。本第二實施例提供了具有兩個弧形割溝槽5的防裂木螺絲之態樣，此種態樣可提供更大的容屑空間，並在旋入時能持續減緩旋入扭力增加的速度，進而有效預防木材破裂，尤其應用於較硬的木塊上時，能明顯感受到鎖入時的順暢性。Referring to Figures 10 to 13, a second embodiment of the anti-crack wood screw of the present invention is shown. The second embodiment is substantially the same as the first embodiment, except that: the anti-crack in the second embodiment The split wood screw includes two arc-shaped cutting grooves 5 arranged adjacent to each other in the axial direction. One of the arc-shaped cutting grooves 5 extends from the shaft section 411 to the pointed cone section 412, and the other one extends from the shaft section 411 to the pointed cone section 412. Formed on the shaft section 411, the arc-shaped grooves 5 can be separated from each other as shown in Figures 10 and 12, or can be connected to each other as shown in Figures 11 and 13. The curvature centers C of the arc-shaped grooves 5 can be located radially on the same side of the central axis D of the screw 4 as shown in Figures 11 and 13, so that they are both left or right arcs. It can also be located on the opposite side of the central axis D of the screw 4 in the radial direction, as shown in Figures 10 and 12, and can be left arcs and right arcs respectively. This second embodiment provides an anti-cracking wood screw with two arc-shaped grooves 5, which can provide a larger chip-holding space and can continuously slow down the increase in screwing torque during screwing. speed, thereby effectively preventing wood from cracking. Especially when used on harder wood blocks, you can clearly feel the smoothness when locking in.

參閱圖14、圖15，及圖16，本發明防裂木螺絲之弧形割溝槽5的成型方法包含一前置步驟，及一切削步驟。在該前置步驟中，準備一如圖14所示的刀具6，及一如圖15所示的待加工螺絲7，該刀具6包含一呈圓筒狀的筒身61，及複數連續設置於該筒身61的一端上且彼此環狀排列的鋸刃62。該待加工螺絲7包含一螺頭71，及一螺桿72。該螺桿72包括一連接該螺頭71且沿軸向朝遠離該螺頭71之方向延伸的桿體部721，及一凸設於該桿體部721上且沿軸向螺旋延伸的螺牙部722。在該切削步驟中，驅動該刀具6旋轉並將該刀具6朝該螺桿72移動，透過旋轉的該等鋸刃62在該螺桿72上沿前述的該弧形路徑切削出一如前所述的弧形割溝槽5，從而製得一如該第一實施例所述的防裂木螺絲(如圖16所示)。切削時需控制切削角度及切削深度，前者是指需在該刀具6靠近該螺桿72的過程中，控制該刀具6的中心軸線E與該螺桿72之中心軸線D互為歪斜線，以確保該槽底面53與該螺桿72之中心軸線D平行。後者是指需使該槽底面53與該螺桿72之中心軸線D沿徑向彼此相間隔，以確保該防裂木螺絲整體的結構強度足夠。此外，當需要加工出如該第二實施例所述具有兩個弧形割溝槽5的防裂木螺絲時，僅需在該切削步驟之後再次重複該切削步驟，以切削出另一個弧形割溝槽5即可，當然，也可以在進行第一次的切削步驟後，重新入料或重新定位後，再進行第二次的切削步驟。Referring to Figures 14, 15, and 16, the method for forming the arc-shaped cutting groove 5 of the anti-cracking wood screw of the present invention includes a pre-step and a cutting step. In this preparatory step, a tool 6 as shown in Figure 14 and a screw 7 to be processed as shown in Figure 15 are prepared. The tool 6 includes a cylindrical barrel 61, and a plurality of continuously arranged Saw blades 62 are arranged annularly on one end of the barrel 61 . The screw 7 to be processed includes a screw head 71 and a screw rod 72 . The screw rod 72 includes a rod body portion 721 connected to the screw head 71 and extending axially away from the screw head 71 , and a thread portion protruding from the rod body portion 721 and extending spirally along the axial direction. 722. In the cutting step, the tool 6 is driven to rotate and moves toward the screw 72 , and the rotating saw blades 62 cut a piece of the screw 72 along the arc-shaped path as described above. The groove 5 is cut in an arc shape to produce a crack-proof wood screw as described in the first embodiment (as shown in Figure 16). The cutting angle and cutting depth need to be controlled during cutting. The former means that when the tool 6 is close to the screw 72, the central axis E of the tool 6 and the central axis D of the screw 72 need to be controlled to be skewed to each other to ensure that the The groove bottom 53 is parallel to the central axis D of the screw 72 . The latter means that the groove bottom surface 53 and the central axis D of the screw 72 need to be radially spaced apart from each other to ensure that the overall structural strength of the anti-cracking wood screw is sufficient. In addition, when it is necessary to process anti-cracking wood screws with two arc-shaped cutting grooves 5 as described in the second embodiment, it is only necessary to repeat the cutting step again after the cutting step to cut another arc-shaped groove. Just cut the groove 5. Of course, you can also perform the second cutting step after re-feeding or repositioning after the first cutting step.

綜上所述，本發明防裂木螺絲藉由該至少一弧形割溝槽5的該切削面51及該切削刃511可增加該防裂木螺絲切斷木纖維之能力，有效降低旋入扭力，以及藉由該至少一弧形割溝槽5的該輔助面52及該輔助刃521可輔助穩固螺絲鎖入方向，減輕施工負擔以提升施工效率，該至少一弧形割溝槽5還利於導入及排出木屑，有效提升容屑及排屑之效果，進而降低木材裂材之風險，提高施工成功率，故確實能達成本發明之目的。To sum up, the anti-cracking wood screw of the present invention can increase the ability of the anti-cracking wood screw to cut wood fibers through the cutting surface 51 and the cutting edge 511 of the at least one arc-shaped groove 5, and effectively reduce the screw-in time. The torque, and the auxiliary surface 52 and the auxiliary edge 521 of the at least one arc-shaped cutting groove 5 can assist in stabilizing the screw locking direction, reduce the construction burden and improve the construction efficiency. The at least one arc-shaped cutting groove 5 also can It is conducive to the introduction and discharge of wood chips, effectively improves the effect of chip holding and chip removal, thereby reducing the risk of wood splitting and improving the construction success rate, so the purpose of the present invention can indeed be achieved.

惟以上所述者，僅為本發明之實施例而已，當不能以此限定本發明實施之範圍，凡是依本發明申請專利範圍及專利說明書內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。However, the above are only examples of the present invention, and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of this invention.

3:螺頭 4:螺桿 41:桿體部 411:桿身段 412:尖錐段 42:螺牙部 5:弧形割溝槽 51:切削面 511:切削刃 52:輔助面 521:輔助刃 53:槽底面 541:第一端緣 542:第二端緣 6:刀具 61:筒身 62:鋸刃 7:待加工螺絲 71:螺頭 72:螺桿 721:桿體部 722:螺牙部 B:開口 C:曲率中心 D:中心軸線 E:中心軸線 d:底徑 w:寬度 α:圓心角 β:交角3: screw head 4:Screw 41: Rod body part 411:shaft section 412: pointed cone section 42:Thread part 5: Arc cutting groove 51: Cutting surface 511:Cutting edge 52: Auxiliary surface 521: Auxiliary blade 53:Trough bottom 541:First edge 542:Second edge 6: Knives 61: Barrel body 62:Saw blade 7: Screws to be processed 71: screw head 72:Screw 721: Rod body part 722:Thread part B:Open your mouth C:Center of curvature D:Central axis E:Central axis d: bottom diameter w:width α: central angle β: intersection angle

本發明之其它的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中：圖1是一正視圖，說明一習知具有割溝槽的木螺絲；圖2是一立體圖，說明一用於加工出圖1之木螺絲的刀具；圖3是一正視圖，說明本發明防裂木螺絲之一第一實施例；圖4及圖5皆是不完整的立體圖，說明該第一實施例中一弧形割溝槽不同角度的態樣；圖6是一正視圖，說明該弧形割溝槽的另一種態樣；圖7是一俯視剖面圖，說明沿圖3中A-A剖面線剖開後的俯視剖面態樣；圖8及圖9皆是不完整的正視圖，說明該弧形割溝槽的各項參數；圖10至圖13皆是正視圖，說明本發明防裂木螺絲之一第二實施例；圖14是一立體圖，說明該弧形割溝槽的成型方法中所使用的一刀具；圖15是一示意圖，說明該成型方法中之一切削步驟；及圖16是一正視圖，說明該切削步驟後所製得的一防裂木螺絲。 Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a front view illustrating a conventional wood screw with grooves; Figure 2 is a perspective view illustrating a tool used to process the wood screws of Figure 1; Figure 3 is a front view illustrating a first embodiment of a crack-proof wood screw according to the present invention; Figures 4 and 5 are both incomplete perspective views, illustrating the different angles of an arc-shaped groove in the first embodiment; Figure 6 is a front view illustrating another aspect of the arc-shaped cutting groove; Figure 7 is a top cross-sectional view, illustrating the top cross-sectional appearance after being cut along the A-A section line in Figure 3; Figures 8 and 9 are both incomplete front views, illustrating various parameters of the arc-shaped groove; Figures 10 to 13 are all front views, illustrating a second embodiment of the anti-cracking wood screws of the present invention; Figure 14 is a perspective view illustrating a tool used in the arc-cut groove forming method; Figure 15 is a schematic diagram illustrating one of the cutting steps in the forming method; and Figure 16 is a front view illustrating a crack-resistant wood screw produced after the cutting step.

3:螺頭 3: screw head

4:螺桿 4:Screw

41:桿體部 41: Rod body part

411:桿身段 411:shaft section

412:尖錐段 412: pointed cone section

42:螺牙部 42:Thread part

5:弧形割溝槽 5: Arc cutting groove

51:切削面 51: Cutting surface

52:輔助面 52: Auxiliary surface

53:槽底面 53:Trough bottom

B:開口 B:Open your mouth

C:曲率中心 C:Center of curvature

D:中心軸線 D:Central axis

Claims

一種防裂木螺絲，包含：一螺頭；一螺桿，包括一連接該螺頭且沿軸向朝遠離該螺頭之方向延伸的桿體部，及一凸設於該桿體部上且沿軸向螺旋延伸的螺牙部；及至少一弧形割溝槽，沿一弧形路徑延伸並穿設該螺牙部，該至少一弧形割溝槽穿鑿該螺牙部的至少一部分而界定出一切削面、一沿徑向與該切削面相間隔的輔助面，及一連接該切削面與該輔助面的槽底面，該切削面與該螺牙部相配合形成一連續的切削刃，該輔助面與該螺牙部相配合形成一連續的輔助刃，該槽底面與該桿體部界定出一沿軸向相對靠近該螺頭的第一端緣，及一沿軸向相對遠離該螺頭的第二端緣，該槽底面的寬度不大於該第一端緣或該第二端緣的長度。 A splinter-proof wood screw containing: a screw head; A screw rod includes a rod body portion connected to the screw head and extending axially in a direction away from the screw head, and a thread portion protruding from the rod body portion and extending spirally along the axial direction; and At least one arc-shaped cutting groove extends along an arc-shaped path and penetrates the thread portion. The at least one arc-shaped cutting groove cuts through at least a portion of the thread portion to define a cutting surface, a radial direction and a cutting surface. The cutting surface has an auxiliary surface spaced apart from it, and a groove bottom surface connecting the cutting surface and the auxiliary surface. The cutting surface cooperates with the thread portion to form a continuous cutting edge. The auxiliary surface cooperates with the thread portion to form a continuous cutting edge. A continuous auxiliary blade, the groove bottom surface and the rod body define a first end edge relatively close to the screw head along the axial direction, and a second end edge relatively far away from the screw head along the axial direction, the groove bottom surface The width is not greater than the length of the first end edge or the second end edge.

如請求項1所述的防裂木螺絲，其中，該至少一弧形割溝槽之弧形路徑不具有反曲點，且曲率中心沿徑向位於該螺桿之中心軸線的一側。The anti-crack wood screw of claim 1, wherein the arc path of the at least one arc-shaped groove has no inflection point, and the center of curvature is located radially on one side of the central axis of the screw.

如請求項1所述的防裂木螺絲，其中，該至少一弧形割溝槽兩端的開口沿徑向位於該螺桿之中心軸線的相同一側。The anti-crack wood screw of claim 1, wherein the openings at both ends of the at least one arc-shaped groove are located radially on the same side of the central axis of the screw.

如請求項1所述的防裂木螺絲，其中，該至少一弧形割溝槽之該切削面平行該輔助面，該槽底面沿徑向連接該切削面及該輔助面。The anti-crack wood screw as claimed in claim 1, wherein the cutting surface of the at least one arc-shaped groove is parallel to the auxiliary surface, and the bottom surface of the groove connects the cutting surface and the auxiliary surface in a radial direction.

如請求項1所述的防裂木螺絲，其中，該至少一弧形割溝槽之槽底面與該螺桿之中心軸線平行且沿徑向彼此相間隔。The anti-crack wood screw of claim 1, wherein the bottom surface of the at least one arc-shaped groove is parallel to the central axis of the screw and spaced apart from each other in the radial direction.

如請求項1所述的防裂木螺絲，其中，該至少一弧形割溝槽之弧形路徑的圓心角小於或等於180度。The anti-crack wood screw according to claim 1, wherein the central angle of the arc path of the at least one arc-shaped groove is less than or equal to 180 degrees.

如請求項1所述的防裂木螺絲，其中，該螺桿之螺牙部的底徑與該至少一弧形割溝槽之槽底面的寬度之比值為1.3至3.3。The anti-crack wood screw as claimed in claim 1, wherein the ratio of the bottom diameter of the thread portion of the screw rod to the width of the groove bottom surface of the at least one arc-shaped groove is 1.3 to 3.3.

如請求項1所述的防裂木螺絲，其中，該螺桿之桿體部具有一個一端連接該螺頭的桿身段，及一由該桿身段之另一端沿軸向朝遠離該螺頭的方向延伸的尖錐段，該至少一弧形割溝槽由該桿身段延伸至該尖錐段。The anti-crack wood screw as claimed in claim 1, wherein the shaft portion of the screw has a shaft section connected to the screw head at one end, and a shaft section axially directed away from the screw head from the other end of the shaft section. Extended pointed cone section, the at least one arc-shaped cutting groove extends from the shaft section to the pointed cone section.

如請求項8所述的防裂木螺絲，其中，該至少一弧形割溝槽之該槽底面與該桿身段相配合界定出該第一端緣，且該槽底面與該桿身段及該尖錐段相配合界定出該第二端緣，該第二端緣與該螺桿之中心軸線的交角為0至20度。The anti-crack wood screw as claimed in claim 8, wherein the bottom surface of the at least one arc-shaped groove cooperates with the shaft section to define the first end edge, and the bottom surface of the groove cooperates with the shaft section and the shaft section. The pointed cone section cooperates to define the second end edge, and the intersection angle between the second end edge and the central axis of the screw is 0 to 20 degrees.

如請求項1所述的防裂木螺絲，其中，該螺桿之桿體部具有一個一端連接該螺頭的桿身段，及一由該桿身段之另一端沿軸向朝遠離該螺頭的方向延伸的尖錐段，該防裂木螺絲包含二沿軸向彼此鄰近設置的弧形割溝槽，該等弧形割溝槽的其中之一由該桿身段延伸至該尖錐段，另一弧形割溝槽形成於該桿身段上。The anti-crack wood screw as claimed in claim 1, wherein the shaft portion of the screw has a shaft section connected to the screw head at one end, and a shaft section axially directed away from the screw head from the other end of the shaft section. Extended pointed cone section, the crack-proof wood screw includes two arc-shaped cutting grooves arranged adjacent to each other in the axial direction, one of the arc-shaped cutting grooves extends from the shaft section to the pointed cone section, and the other one extends from the shaft section to the pointed cone section. Arc-cut grooves are formed on the shaft section.

一種防裂木螺絲之弧形割溝槽的成型方法，包含：一前置步驟，準備一刀具，及一待加工螺絲，該刀具包含一呈圓筒狀的筒身，及複數連續設置於該筒身上且彼此環狀排列的鋸刃，該待加工螺絲包含一螺頭，及一螺桿，該螺桿包括一連接該螺頭且沿軸向朝遠離該螺頭之方向延伸的桿體部，及一凸設於該桿體部上且沿軸向螺旋延伸的螺牙部；及一切削步驟，驅動該刀具旋轉並將該刀具朝該螺桿移動，透過旋轉的該等鋸刃在該螺桿上沿一弧形路徑切削出一弧形割溝槽，該弧形割溝槽穿鑿該螺牙部的至少一部分而界定出一切削面、一沿徑向與該切削面相間隔的輔助面，及一連接該切削面與該輔助面的槽底面，該切削面與該螺牙部相配合形成一連續的切削刃，該輔助面與該螺牙部相配合形成一連續的輔助刃，該槽底面與該桿體部界定出一沿軸向相對靠近該螺頭的第一端緣，及一沿軸向相對遠離該螺頭的第二端緣，該槽底面的寬度不大於該第一端緣或該第二端緣的長度。 A method for forming arc-shaped grooves for anti-cracking wood screws, including: A preparatory step is to prepare a tool and a screw to be processed. The tool includes a cylindrical barrel body, and a plurality of saw blades continuously arranged on the barrel body and arranged in an annular shape. The screw to be processed includes a A screw head, and a screw rod. The screw rod includes a rod body connected to the screw head and extending axially in a direction away from the screw head, and a screw protruding from the rod body and extending spirally along the axial direction. Teeth; and In a cutting step, the tool is driven to rotate and moved toward the screw, and an arc-shaped cutting groove is cut along an arc-shaped path on the screw through the rotating saw blades, and the arc-shaped cutting groove penetrates the screw. At least a part of the thread portion defines a cutting surface, an auxiliary surface spaced radially from the cutting surface, and a groove bottom surface connecting the cutting surface and the auxiliary surface, the cutting surface matching the thread portion A continuous cutting edge is formed, the auxiliary surface cooperates with the thread portion to form a continuous auxiliary edge, the groove bottom surface and the rod body portion define a first end edge relatively close to the screw head along the axial direction, and A second end edge relatively away from the screw head in the axial direction, the width of the groove bottom surface is not greater than the length of the first end edge or the second end edge.

如請求項11所述的成型方法，其中，在該切削步驟中，該弧形割溝槽之槽底面與該螺桿之中心軸線平行且沿徑向彼此相間隔。The molding method of claim 11, wherein in the cutting step, the groove bottom surface of the arc-shaped groove is parallel to the central axis of the screw and radially spaced apart from each other.

如請求項11所述的成型方法，其中，在該切削步驟後再重複一次該切削步驟，以透過該等鋸刃在該螺桿上沿該弧形路徑切削出另一個弧形割溝槽，該等弧形割溝槽沿軸向彼此鄰近設置。The molding method as described in claim 11, wherein the cutting step is repeated again after the cutting step to cut another arc-shaped cutting groove on the screw along the arc-shaped path through the saw blades, the The equal arc-shaped grooves are arranged adjacent to each other along the axial direction.