TWI785272B - wood screw structure - Google Patents

Abstract

The present invention provides a wood screw structure which includes a screw head section, a rod body section, a first screw thread and a plurality of crushing rib units, the rod body section is sequentially integrally formed by the screw head section and includes a connecting neck A first shaft part, a second shaft part, a third shaft part and a tapered part extending outwards from the third shaft part; the first thread is helically protruded on the tapered part part, an outer peripheral surface of the second shaft part and the third shaft part; the helical rings of the crushing rib units protrude from the outer peripheral surface of the third shaft part and the tapered part and include a plurality of protrusions A crushing block arranged on a rib body; a first chip discharge port is formed between the crushing blocks, whereby the first chip discharge port can crush and quickly discharge chips, and evenly release the pressure between the object and the object.

Description

wood screw structure

The invention relates to a screw for locking wood, in particular to a wood screw structure which is easy to remove chips and can reduce the locking screw-in torque so as to prevent the locked wooden material from cracking.

When the wood screw is locked into the wood, the wood with higher hardness has a higher resistance due to its high density, which makes it more laborious to screw in the wood screw, and the wood chips generated during the screwing process cannot be effectively discharged. The sawdust remains in the wood and the sawdust is compressed by the pressure of the wood screw, which easily causes the crack of the wood.

However, if a conventional wood screw forms a plurality of irregularly protruding patterns between its threads, this pattern will cause the overall wood screw to produce an uneven bite force between the patterned part and the object during the tapping process, and may cause the wood screw to tap. After entering, problems such as unstable joints and shaking may occur, and the pattern can be composed of multiple rib structures, but these rib structures are not equipped with chip removal structures, so that the wood chips generated during the tapping process are easy to accumulate in the pattern parts. Between the wood screw and the object, it may cause the pressure between the wood screw and the object to increase and cause the object to crack. In addition, in the wood screw manufacturing process, since the threads of each section are set at intervals, the manufacturing process must be completed several times separately, resulting in High cost and time-consuming issues. In view of this, the inventor of the present invention concentrates on research and combines what he has learned, and proposes a wood screw structure that is easy to remove chips in order to overcome the lack of conventional knowledge.

The purpose of the present invention is to solve the problem that the conventional wood screw in the prior art cannot provide effective chip removal and disperse the pressure between the object and the screw when tapping wood.

To achieve the above object, the present invention provides a wood screw structure which includes a screw head section, a rod body section, a first thread and a plurality of crushing rib units, wherein the screw head section includes a top, and a neck extending from the top and tapering away from the top; the shaft section is formed integrally from the neck of the screw head section, and the shaft section includes a first rod connected to the neck body, a second shaft portion, a third shaft portion, and a tapered tapered portion extending outward from the third shaft portion, and the second shaft portion is located on the first shaft portion and the third shaft part, and the third shaft part is arranged between the second shaft part and the tapered part; the first screw thread is spirally provided on the tapered part, the second shaft part and an outer peripheral surface of the third shaft part; the crushing rib units, the spiral ring protrudes on the outer peripheral surface of the third shaft part and the pointed cone part, and each of the crushing rib unit and the first A screw thread is staggered to form an included angle, and the crushing rib unit includes a rib body and a plurality of crushing blocks protruding from the rib body; wherein, a first chip discharge port is formed between the crushing blocks; and the crushing block The outer diameter is smaller than the diameter of the first thread and larger than the diameter of the third shaft part.

Further, the first thread provided at the third shaft part has a plurality of second chip outlets.

Further, each rib body forms a first side and a second side at the intersection of the third shaft portion and the outer peripheral surface of the tapered portion, and the first thread is formed on the second shaft A third side and a fourth side are formed at the intersection of the outer peripheral surface of the body, the third shaft part and the tapered part; wherein, the first side and the third side are on the first side The outer peripheral surfaces of the three shaft parts intersect to form a first included angle, and the angle range of the first included angle is between 40° and 70°.

Further, the intersection of the first side and the fourth side on the outer peripheral surface of the third shaft portion forms a second angle, and the angle range of the second angle is between 110° and 130°.

Further, the intersection of the adjacent first side and the third side on the outer peripheral surface of the tapered portion forms a third included angle, and the angle range of the third included angle is between 50° and 70°.

Further, the intersection of the adjacent first side and the fourth side on the outer peripheral surface of the tapered portion forms a fourth included angle, and the angle range of the fourth included angle is between 110° and 130°.

Further, the first included angle is different from the third included angle.

Further, the intersection of the adjacent second side and the third side on the outer peripheral surface of the third shaft part forms a fifth included angle, the fifth included angle ranges from 100 to 130 degrees, and the first The range of the sum of the first included angle and the fifth included angle is between 150° and 200°.

Further, a second thread is formed on a side of the first shaft portion adjacent to the second shaft portion.

Further, the difference between the outer diameter of the pulverized block and the first thread diameter is 0.6mm~0.7mm.

Therefore, the present invention has the following beneficial effects compared with prior art:

1. In the present invention, a crushing rib unit is provided on the outer peripheral surface of the third shaft portion of the shaft section, and a first chip discharge port is formed between the crushing blocks of the crushing rib unit, so that the crushing blocks can tap and lock the wood screw When the wood chips produced during the process are discharged between the two first threads, the wood chips can be further crushed by using this crushing block, so that the wood chips can be smoothly discharged during subsequent chip removal, and the pressure between the wood screw and the object can be evenly dispersed. To achieve smooth chip removal when tapping the lock.

10: screw head section

11: top

12: Neck

13: convex rib

20: rod body section

21: The first shaft

22: Second shaft part

23: The third shaft

24: Tapered part

25: Outer peripheral surface

30: First thread

31: third side

32: Fourth side

33: The second chip outlet

40: Smash Rib Unit

41: rib body

42: Smashing Blocks

43: The first chip discharge port

44: First side

45: Second side

50: second thread

∠1: the first included angle

∠2: second angle

∠3: third angle

∠4: Fourth angle

D1: outer diameter

D2: screw diameter

D3: rod diameter

Figure 1-1: It is a three-dimensional view of the wood screw structure of the first embodiment of the present invention.

Figure 1-2: It is a partial three-dimensional enlarged view of A in Figure 1-1.

Fig. 2-1: It is the front view of the wood screw structure of the first embodiment of the present invention.

Figure 2-2: It is a partially enlarged view of B in Figure 2-1.

Figure 2-3: It is a sectional view of the line C-C in Figure 2-2.

Fig. 3-1: It is the three-dimensional view of the wood screw structure of the second embodiment of the present invention.

Figure 3-2: A partially enlarged view of the mark D in Figure 3-1.

Fig. 4-1: It is the front view of the wood screw structure of the second embodiment of the present invention.

Figure 4-2: A partially enlarged view of the mark E in Figure 4-1.

Figure 4-3: It is a cross-sectional view of the line F-F in Figure 4-2.

Several preferred implementations of the technical features and operation methods of this application are hereby given, and will be described later in conjunction with illustrations, so as to provide reference for examination. Furthermore, the proportions of the drawings in the present invention may not be drawn according to the actual scale for the convenience of explanation, and the proportions in the drawings are not intended to limit the scope of protection claimed by the present invention.

Regarding the content of the present invention, please refer to the first embodiment of the present invention shown in Fig. 1-1 to Fig. 2-3. The present invention provides a wood screw structure, which mainly includes a screw head section 10, a rod body segment 20 , a first thread 30 and a plurality of crushing rib units 40 . The wood screw structure of the present invention is used for fixing or joining wooden workpieces, such as wooden floors, wooden furniture, etc., but not limited thereto.

More specifically, please refer to Fig. 2-1 again, the screw head section 10 includes a top 11, and a neck 12 extending from the top 11 and tapered away from the top 11, the neck 12 is provided with a plurality of protruding ribs 13, and these protruding ribs 13 can strengthen the embedding property with the object after the wood screw with this wood screw structure is locked into the object.

Please also refer to Fig. 2-1 and Fig. 2-2, the shaft section 20 is formed integrally from the neck 12 of the screw head section 10, and the shaft section 20 includes a connecting rod. A first shaft portion 21 of the neck 12, a second shaft portion 22, a third shaft portion 23, and a tapered tapered portion 24 extending outward from the third shaft portion 23, wherein the The second shaft portion 22 is disposed between the first shaft portion 21 and the third shaft portion 23, and the third shaft portion 23 is disposed between the second shaft portion 22 and the tapered portion 24, In this embodiment, the first shaft portion 21, the second shaft portion 22, the third shaft portion 23 and the tapered portion 24 are integrally formed sequentially; the first thread 30 is spirally protruded On the tapered part 24 , on the outer peripheral surface 25 of the second shaft part 22 and the third shaft part 23 ; The crushing rib units 40 have spiral rings protruding from the third shaft portion 23 and the outer peripheral surface 25 of the tapered portion 24, and each crushing rib unit 40 is staggered with the first thread 30 to form an included angle, wherein , the present embodiment is formed with three crushing rib units 40 on the third shaft portion 23 and the tapered portion 24, but not limited thereto, and please refer to Figures 2-3 again, each of the The crushing rib unit 40 also includes a rib body 41 protruding from the third shaft portion 23 and the pointed cone portion 24 and a plurality of crushing blocks 42 protruding from the rib body 41; wherein, the crushing blocks 42 are Independently protruding from each rib body 41, the appearance shape of the crushing block 42 is a pyramid, such as a triangular pyramid or a quadrangular pyramid, but not limited thereto, and the crushing block 42 of the present embodiment is in the shape of a pyramid. A quadrangular pyramid, and two adjacent crushing blocks 42 and the outer peripheral surface of the rib body 41 each form a first chip discharge opening 43, so that the crushing blocks 42 and the first chip discharge ports 43 are staggered Arranged on each rib body 41, through the first chip discharge port 43, when the sawdust is discharged on the outer peripheral surface 25 between the two first threads 30, it can be passed through the crushing rib units 40 by The combination of the crushing block 42 and the first chip outlet 43 for cutting is beneficial to cut wood fibers, and the cut wood chips can be continuously discharged along the space of the outer peripheral surface 25 between the first threads 30 ; Wherein, the outer diameter D1 of the crushing block 42 is smaller than the screw diameter D2 of the first screw thread 30 and greater than the diameter D3 of the third shaft portion 23, and the outer diameter D1 of the crushing block 42 is the same as the first The difference between the screw diameters D2 of the thread 30 is between 0.6 mm and 0.7 mm, so that the chip removal of the sawdust will not be blocked by the crushing rib units 40 when locked.

In addition, each rib body 41 forms a first side 44 and a second side 45 at the intersection of the third shaft portion 23 and the outer peripheral surface 25 of the tapered portion 24, and the first thread 30 A third side 31 and a fourth side 32 are formed at the intersection of the second shaft portion 22, the third shaft portion 23 and the outer peripheral surface 25 of the tapered portion 24; wherein, the first The intersection of one side 44 and the third side 31 on the outer peripheral surface 25 of the third shaft portion 23 forms a first included angle ∠1, and the angle range of the first included angle ∠1 is between 40° and 70°; The first side 44 and the fourth side 32 are on the outer periphery of the third shaft portion 23 The surfaces 25 intersect to form a second angle ∠2, and the angle range of the second angle ∠2 is between 110 and 130 degrees; The outer peripheral surface 25 intersects to form a third included angle ∠3, and the angle range of the third included angle ∠3 is between 50 and 70 degrees; The outer peripheral surfaces 25 intersect to form a fourth included angle ∠4, and the angle range of the fourth included angle ∠4 is between 110 and 130 degrees. In addition, the angles of the first included angle ∠1 and the third included angle ∠3 are different, and the The intersection of the second side 45 and the third side 31 on the outer peripheral surface 25 of the third shaft portion 23 forms a fifth included angle ∠5, and the range of the fifth included angle ∠5 is between 100° and 130°. The sum of the angle values of the first included angle ∠1 and the fifth included angle ∠5 ranges from 150 to 200 degrees, and the first included angle ∠1 of the adjacent first threads 30 will be different, thereby, using When the first included angles ∠1 of the adjacent first threads 30 are different, there are different angles for cutting and cutting wood fibers, thereby increasing the efficiency of cutting wood chips and further increasing the cutting efficiency.

In addition, the first thread 30 is recessed at the third shaft portion 23 to form a plurality of second chip outlets 33 , whereby the first thread 30 utilizes the holes formed on the third shaft portion 23 . The second chip outlet 33 is used for reaming, that is, after the tapered portion 24 is locked into the workpiece for positioning, the first thread 30 having the second chip outlets 33 on the third shank portion 23 can be used. Its screw diameter D2 is larger than the rod diameter D3, so that in the subsequent tapping process, the first thread 30 with the second chip removal ports 33 on the third shaft part 23 will reduce the contact with the object, and utilize The reaming and chip removal of the second chip outlets 33 reduce the frictional force, so that the user can tap and lock the wood screw on the object effortlessly; please refer to the first shaft part shown in Figure 1-1 again. 21 A second thread 50 may be formed on one side adjacent to the second shaft portion 22, wherein, the second thread 50 in this embodiment is generally in the shape of a twill; please refer to Figure 3-1 to Figure 4- As shown in Figure 3, it is the second embodiment of the present invention, and its main structure is roughly the same as that of the first embodiment of the present invention, so the same parts will not be repeated, and only the different structural parts will be described. The second embodiment of the present invention The crushing block 42 of the crushing rib unit 40 of the embodiment is a rhombus-shaped quadrangular pyramid, whereby the wood chips produced when tapping the screw hole pass through the first chip discharge port. 43, it will be crushed and cut off by these crushing blocks 42, and will be accelerated and discharged by the first chip discharge port 43 between the two crushing blocks 42, so as to avoid squeezing each other because the chips remain in the wooden object and the wood screw. This further leads to the problem of increased friction and even cracks in the wooden object. In addition, the outer peripheral edges of the first thread 30 and the second thread 50 are provided with cutting edges, which can effectively reduce the friction during rotation and improve the lock. solid efficiency.

To sum up, the outer diameter D1 of the crushing block 42 of the crushing rib unit of the wood screw structure of the present invention is smaller than the screw diameter D2 of the first thread 30 and the difference is between 0.6 mm and 0.7 mm. It can facilitate the chip removal of sawdust and will not be blocked by these crushing rib units 40, so that the chips can be further crushed and quickly removed when the object is screwed into the tapping lock, so that the sawdust can be discharged from the object, and evenly released and connected to the object. The pressure between the objects, in addition, the first thread, the second thread and the cutting edge on the outer periphery can be positioned on the object and provide stability during tapping and locking, thereby improving the accuracy of alignment.

10: screw head section

11: top

20: rod body section

21: The first shaft

22: Second shaft part

23: The third shaft

24: Tapered part

25: Outer peripheral surface

30: First thread

40: Smash Rib Unit

50: second thread

Claims (10)

A wood screw structure, which mainly includes: a screw head section, including a top, and a neck extending from the top and tapering away from the top; a rod body section, which is integrally formed by the screw head section neck Molded out, the shaft section includes a first shaft portion connected to the neck, a second shaft portion, a third shaft portion and a tapered tip extending outward from the third shaft portion a tapered portion, wherein the second shaft portion is disposed between the first shaft portion and the third shaft portion, and the third shaft portion is disposed between the second shaft portion and the tapered portion; a first screw thread, spirally protruded on the outer peripheral surface of the tapered portion, the second shaft portion and the third shaft portion; and at least one crushing rib unit, the spiral ring protruding from the third shaft portion and the outer peripheral surface of the tapered part, and each of the crushing rib units and the first screw thread are staggered to form an included angle, wherein the crushing rib unit also includes a protruding part from the third shaft part and the tapered part Rib body and a plurality of crushed blocks protruding from the rib body; wherein, the crushed blocks are independently protruded from each rib body; wherein, two adjacent crushed blocks are parallel to the outer peripheral surface of the rib body each forming a first chip removal port, so that the crushing blocks and the first chip removal ports are alternately arranged on each rib body; wherein, the outer diameter of the crushing blocks is smaller than the diameter of the first screw thread , and larger than the diameter of the third shaft part. According to the wood screw structure described in item 1 of the scope of the patent application, the first thread provided at the third shaft part has a plurality of second chip removal ports. The wood screw structure described in item 1 of the scope of the patent application, wherein each rib body forms a first side and a second side, and the first thread intersects on the outer peripheral surface of the second shaft part, the third shaft part and the tapered part The connection will form a third side and a fourth side; wherein, the first side and the third side intersect on the outer peripheral surface of the third shaft portion to form a first angle, and the first The angle range of the included angle is between 40 and 70 degrees. The wood screw structure described in item 3 of the scope of the patent application, wherein, the first side and the fourth side intersect on the outer peripheral surface of the third shaft part to form a second angle, and the second angle is The angle range is between 110 and 130 degrees. The wood screw structure described in item 3 of the scope of the patent application, wherein the adjacent first side and the third side intersect on the outer peripheral surface of the tapered part to form a third angle, the third angle The angle range is between 50~70 degrees. As the wood screw structure described in item 3 of the scope of the patent application, wherein the adjacent first side and the fourth side intersect on the outer peripheral surface of the tapered part to form a fourth angle, the fourth angle The angle range is between 110 and 130 degrees. The wood screw structure described in item 5 of the scope of the patent application, wherein the first angle is different from the third angle. The wood screw structure described in item 3 of the scope of the patent application, wherein the adjacent second side and the third side intersect on the outer peripheral surface of the third shaft to form a fifth angle, the fifth The included angle ranges from 100 to 130 degrees, and the sum of the first included angle and the fifth included angle ranges from 150 to 200 degrees. According to the wood screw structure described in item 1 of the scope of the patent application, a second screw thread is further formed on a side of the first shaft part adjacent to the second shaft part. The wood screw structure described in item 1 of the scope of the patent application, wherein the difference between the outer diameter of the crushed block and the diameter of the first screw thread is 0.6mm~0.7mm.

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