Screw-in parts

Abstract

To provide a screwing member which enhances cutting efficiency during screwing, quickly discharges chips during the screwing process of the screwing member, reduces screwing resistance, and prevents loosening after screwing. [Solution] The screw thread includes a rod 31 and a thread step 34, the thread step 34 is spirally arranged on a peripheral surface 31a of the rod 31, the thread step 34 being composed of a plurality of threads 341, the rod 31 having a head 32 at one end and a tip portion 33 at the other end, the tip portion 33 having a sharp end 331, and an auxiliary unit 35 intersecting the thread step 34 is provided on the peripheral surface 31a of the rod 31, the auxiliary unit 35 having a plurality of sharpened lumps 351 between any two adjacent threads 341, a passage 352 being formed between any two adjacent sharpened lumps 351, and each sharpened lumps 351 extending outward from the peripheral surface 31a and gradually narrowing to form a sharp point 351a.

Description

[Technical field]

[0001] The present invention relates to a screw, and more particularly to a screw member that increases the screw fastening force and prevents loosening after screwing. [Background technology]

[0002] As shown in FIG. 1, a typical screw 1 includes a rod 11, a head 12 formed on one end of the rod 11, a tip 13 formed on the other end of the rod 11, and a thread step 14 formed around the peripheral edge surface of the rod 11. The thread step 14 has a plurality of threads 141 extending from the head 12 to the tip 13, which tapers off to form a conical pointed end. When screwing the screw 1, first the tip 13 is placed against the surface of the object 2 (for example, wood), and then a rotational torque is applied to the head 12 with a tool (not shown), causing the tip 13 to drill a hole in the object 2 by the force of the torque. In the thread hole drilling operation, not only is the thread hole formed, but the rod 11 also enters the thread hole. At this time, the multiple threads 141 cut into the wood fibers inside the article 2, generating chips. In addition, during the process of the rod 11 being continuously screwed into the screw hole, some of the cutting chips are discharged along the gap between any two threads 141, and when the head 12 reaches the surface of the article 2, the screwing operation of the screw 1 is completed.

[0003] In the conventional screw 1 described above, the thread shapes of the multiple threads 141 are almost the same, and the cutting effect is limited. That is, since the multiple threads 141 cannot completely cut the wood fibers of the article 2 when screwed, chips tend to stick to the peripheral edge surface of the rod 11, increasing the screwing resistance and slowing down the screwing speed, etc. Furthermore, the chip discharge effect and chip accumulation space are limited, and inappropriate accumulation of chips causes cracks in the article 2, so improvements were needed. Summary of the Invention [Problem to be solved by the invention]

[0004] The problem that the present invention aims to solve is to provide a screw-connecting member which improves the cutting efficiency during screw-connection, quickly discharges chips during the screw-connection process, reduces the screw-connection resistance, and prevents loosening after screwing. [Means for solving the problem]

[0005] In order to solve the above problems, the threaded member of the present invention includes a rod and a thread step, the thread step being spirally arranged on the circumferential surface of the rod and consisting of a plurality of threads, the rod having a head formed at one end and a tip portion formed at the other end, the tip portion having a sharp end, the threaded member being characterized in that an auxiliary unit is separately provided on the circumferential surface of the rod and intersecting with the thread step, the auxiliary unit having a plurality of sharpened portions between any two adjacent threads, a passage is formed between any two adjacent sharpened portions of the plurality of sharpened portions, and each sharpened portion extends outward from the circumferential surface of the rod and gradually narrows to form a sharp point. Effect of the Invention

[0006] The screwing member of the present invention has a thread section on a rod and an auxiliary unit intersecting the thread section, the auxiliary unit has a number of sharpened pieces between any two threads of the thread section and a passage formed between any two sharpened pieces, so that the sharpened pieces cut the wood fibers of the object that were not cut by the thread section, and also shatter and reduce the block-shaped chips generated during the cutting process, thus preventing the wood fibers from sticking excessively to the rod, and the cooperation between the passages and the threads not only effectively discharges the chips, but also retains an appropriate amount of chips, reduces the screwing resistance, speeds up cutting and screwing, improves the cutting efficiency during screwing, promotes the screwing fixing force, and prevents breakage, and the sharpened pieces bring about a multi-point insertion effect between the object, further increasing the fixing force and achieving a stable screwing effect. [Brief description of the drawings]

[0007] [Figure 1]FIG. 1 is a side view of a conventional screw. [Diagram 2] 1 shows a first embodiment of the present invention, in which (a) is an overall side view of a screw member, and (b) is an enlarged view of portion 2A. [Diagram 3] 1 is a side view of a screw member in a screwed state according to a first embodiment of the present invention; [Figure 4] 4A and 4B show a second embodiment of the present invention, in which (a) is an overall side view of a screw member, and (b) is an enlarged view of part 4A. [Diagram 5] 5 shows a third embodiment of the present invention, in which (a) is an overall side view of a screw member, and (b) is an enlarged view of part 5A. [Figure 6] 11 shows a fourth embodiment of the present invention, in which (a) is an overall side view of a screw member, and (b) is an enlarged view of part 6A. [Figure 7] 13 shows a fifth embodiment of the present invention, in which (a) is an overall side view of a screw member, and (b) is an enlarged view of part 7A. [Figure 8] 8 shows a sixth embodiment of the present invention, in which (a) is an overall side view of a screw member, and (b) is an enlarged view of part 8A. [Figure 9] 13 shows a seventh embodiment of the present invention, in which (a) is an overall side view of the screw member, and (b) is an enlarged view of part 9A. [Figure 10] 10A is an overall side view of a screw member according to an eighth embodiment of the present invention, and FIG. 10B is an enlarged view of a portion 10A. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 2 and 3 show a first embodiment of the present invention. As shown in FIG. 2( a ), the threaded member 3 in the first embodiment includes a rod body 31 and a thread step 34 . The rod 31 has a head 32 and a tip 33 at both ends in the longitudinal direction. That is, the head 32 is formed at one end of the rod 31, and the tip 33 is formed at the other end of the rod 31. A thread step 34 is spirally provided on the peripheral surface 31a of the rod 31, and the thread step 34 is composed of a plurality of threads 341.

[0009] In addition to the threaded sections 34, auxiliary units 35 are provided on the peripheral surface 31a of the rod 31. The auxiliary units 35 are distributed among the threaded sections 34, and the auxiliary units 35 and the threaded sections 34 are intersecting with each other. The auxiliary unit 35 has a plurality of sharpened blocks 351 formed between any two threads 341, and a passage 352 formed between any two sharpened blocks 351, and any two adjacent sharpened blocks 351 are spaced apart to form the passage 352, as shown in FIG. 2(b) 2A.

[0010] Each of the sharpened portions 351 extends outward from the peripheral surface 31a and gradually shrinks to have a sharpened point 351a, that is, the area of ​​the sharpened portion 351 shrinks outward to form the sharpened point 351a. Further, a reference line R is defined for the sharp-tip block 351. The starting point of the reference line R is located at a specific position within the area where each sharp-tip block 351 and the peripheral surface 31a contact each other, with the specific position being the reference point (the center of the area), and the reference line R extends outward and passes through the sharp-tip point 351a.

[0011] 2(b), in a situation where the reference line R is used as a reference, the sharpened block 351 and the sharpened point 351a are disposed perpendicular to the peripheral surface 31a. That is, the reference line R extends perpendicular to the peripheral surface 31a, and the angle between the reference line R and the peripheral surface 31a is 90 degrees.

[0012] 4, when the reference line R is used as a reference, the sharpened block 351 and the sharpened point 351a are disposed at a non-perpendicular angle to the peripheral surface 31a. That is, the reference line R extends in a direction that is not perpendicular to the peripheral surface 31a, and an inclination angle θ is formed between the reference line R passing through the reference point and the peripheral surface 31a.

[0013] The function of the screw member 3 will be described below. When using the screw member 3, first the sharp end 331 is placed against the surface of an article 4 (for example, wood), and then a rotational torque is applied to the head 32, which further moves the sharp end 331 to open a screw hole in the surface of the article 4, and the tip 33 gradually enters the screw hole. At that time, the threads 341 located at the tip 33 cut the wood fibers inside the article 4. Also, each sharp point 351 located at the tip 33 cuts the wood fibers. That is, the wood fibers not cut by the threads 341 are cut by the sharp points 351, and as a result, a multiple cutting effect is achieved, and the wood fibers that tend to get tangled on the tip 33 in the initial stage of the screwing operation are effectively cut into chips, thereby reducing the screwing resistance in the initial stage of the screwing operation.

[0014] At the same time, each sharp point 351 located at the tip 33 creates a continuous cutting effect in combination with the cutting action of the thread 341, further shortening the time required for the screwing action and reducing the required force, achieving the effects of speedy screwing and saving time and force. When the rod 31 enters the screw hole, the multiple threads 341 together with the multiple sharp points 351 effectively cut the wood fibers on the rod 31, and even if the wood fibers become entangled, they become chips. Furthermore, if the chips are block-shaped, the block-shaped chips are further subjected to the cutting action of the multiple threads 341 and the sharpened pieces 351, and are crushed and reduced in size. This not only reduces the screwing resistance, but also allows the rod 31 to smoothly enter the screwing hole, further enhancing the screwing effect.

[0015] Of the chips generated in the cutting process of the multiple threads 341 and the sharpened blocks 351, some of the chips move along the passages 352 between the multiple sharpened blocks 351 toward the head 32 and are quickly discharged to the outside, while at the same time an appropriate amount of the chips remains in each passage 352. The spaces formed between the multiple threads 341 allow the screw member 3 to be stably screwed and fixed. By discharging some of the chips to the outside through the multiple passages 352, it is possible to prevent the peripheral surface 31a of the rod 31 from being pressed by excess chips, which would reduce the screwing efficiency, and it is also possible to prevent excessive chips from remaining inside the article 4 and being pushed out, which would cause the article 4 to break. In addition, when the screw member 3 is screwed and fixed to the article 4, the multiple sharp points 351a come into contact with the article 4, forming a multi-point fitting effect between the multiple sharp points 351 and the article 4, which further effectively improves the screwing and fixing force of the screw member 3 and prevents loosening after screwing.

[0016] Furthermore, the tip portion 33 gradually shrinks to form a sharp tip 331 at the end of the tip portion 33, and at the same time, the auxiliary unit 35 is placed between the sharp tip 331 and the head portion 32. The sharpened block 351 of the auxiliary unit 35 may be adjacent to the sharp end 331 , or the sharpened block 351 of the auxiliary unit 35 may be connected to the sharp end 331 . Alternatively, in a third embodiment shown in FIG. 5, similar to the first embodiment, the reference line R passing through the sharp point 351a is set perpendicular to the peripheral surface 31a, and in a fourth embodiment shown in FIG. 6, similar to the second embodiment, the reference line R extends in a direction not perpendicular to the peripheral surface 31a, but in FIGS. 5 and 6, the sharp block 351 of the auxiliary unit 35 is formed at a position away from the sharp end 331 without being adjacent to it, and further a screw thread 341 may be formed between the auxiliary unit 35 and the sharp end 331, and the number of screw threads 341 formed is adjusted as necessary.

[0017] FIG. 7 shows a fifth embodiment of the present invention. The screw member 3 includes members such as a rod body 31, a head portion 32, a tip portion 33, a thread step 34, and an auxiliary unit 35, similarly to the first embodiment. This embodiment differs from the first embodiment in that the tip 33 is formed to have a polygonal cross section, i.e., the tip 33 has a plurality of faces, and a cutting edge 332 is formed at the interconnection point of any two adjacent faces.

[0018] In addition to the structure in which the tip 33 has a polygonal cross section and the cutting edge 332 is formed, in the sixth embodiment shown in FIG. 8, similar to the second embodiment, the reference line R extends in a direction not perpendicular to the peripheral surface 31a. In the seventh embodiment shown in FIG. 9, similar to the third embodiment, the reference line R is set perpendicular to the peripheral surface 31a, and the sharpened block 351 is formed at a position away from the sharp end 331 without being adjacent to it. In the eighth embodiment shown in FIG. 10, similar to the fourth embodiment, the reference line R extends in a direction not perpendicular to the peripheral surface 31a, and the sharpened block 351 is formed at a position away from the sharp end 331 without being adjacent to it.

[0019] The multiple cutting edges 332 of the tip 33 can help the sharp end 331 to be quickly positioned on the article, which is not only beneficial for strengthening the initial screwing strength of the tip 33, but also reduces the initial screwing resistance, and the multiple cutting edges 332 cooperate with the thread step 34, the sharp point block 351, and the passage 352 to provide various cutting effects. Not only does it achieve speedy screwing, it also effectively discharges chips, retains an appropriate amount of chips, and utilizes the multi-sided shape of the tip 33 to generate a tight screwing fixing force between the screwing member 3 and the article 4, achieving an overall stable screwing positioning effect of the screwing member 3, and preventing loosening after screwing.

[0020] The above description is merely an explanation of the embodiments of the present invention, and does not limit the scope of the present invention; that is, all changes and modifications that do not deviate from the scope of the utility model claims belong to the scope of the present invention. [Explanation of symbols]

[0021] 1 screw 11 rod 12 Head 13 Tip 14 Thread Step 141 Thread 2 Goods 3 Screw-in parts 31 rod 31a Circumferential surface 32 Head 33 Tip 331 Sharp Edge 332 Blade edge 34 Thread Step 341 Thread 35 Auxiliary Unit 351 Sharp Block 351a Sharp point 352 Passage R Reference Line θ Tilt angle 4 Goods

Claims

1. a rod and a threaded step; The thread step is formed in a spiral shape on the circumferential surface of the rod, and the thread step is composed of a plurality of threads, and a head is formed on one end of the rod, and a tip portion is formed on the other end of the rod, and the tip portion has a sharp end. An auxiliary unit is provided on the circumferential surface of the rod and is intersected with the threaded section; The auxiliary unit is a screw member characterized in that it has a plurality of sharpened portions between any two adjacent threads, a passage is formed between any two adjacent sharpened portions of the plurality of sharpened portions, and each sharpened portion extends outward from the peripheral surface of the mallet body and gradually narrows to form a sharp point.

2. The screw member according to claim 1, characterized in that a reference line is defined which extends outward from the center of the area where the sharp point and the peripheral surface of the rod contact each other and passes through the sharp point, and an inclination angle is formed between the reference line and the peripheral surface of the rod.

3. 3. A threaded member according to claim 1 or 2, wherein said tip portion is formed to have a polygonal cross section having a plurality of faces, and a cutting edge is formed at the mutual connection point of any two adjacent faces.

4. 3. The screw member according to claim 1, wherein the auxiliary unit extends between the sharp end and the head.

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