TWI640696B - Wood screw (1) - Google Patents

Abstract

The present invention relates to a wood screw, which mainly comprises a screw head and a rod body, wherein the rod body top end is provided with the screw head portion, and the rod body is divided into a shaft portion and a screw-in section, The shaft portion is a flat surface and is provided with a thread, and the screw-in section is coupled to the bottom of the shaft portion and forms a tapered flat surface, which is characterized by a tapered surface of the screw-in section The cutting unit is provided with at least one cutting unit, and the cutting unit can form a concave portion, a convex portion or a concave-convex combined shape; thereby, when the screw is screwed, the cutting unit can be cut and cut according to the workpiece by the screwing end. It is convenient for pre-drilling and chip removal.

Description

Wood screw (1)

The invention relates to a wood screw, in particular to a wood screw which specializes in wood material and has the function of convenient screwing and chip removal.

Pressing, the types of screws used for screwing fixtures can be quite varied, and they have different structural designs depending on various applications. The types of screws are: Machine Screws, Self-tapping screws (TappingScrew), Woodworking Screws (WoodScrew), Drilling screws, etc. However, when the above-mentioned locks are applied to different places and different soft and hard materials, different screws must be selected, such as mechanical screws for precision machinery and nuts, and screw threads; and self-drilling 』, "iron die" screws, the locks are often iron plates or construction cement, etc., often used in the construction industry; and wood screws are widely used for fixing or combining wooden workpieces, but also for non-steel materials. Locking such as wood, plywood, plasterboard, etc.

In addition to different uses, the shape of each screw is also different. For example, the self-drilling screw includes a nut head, a toothed rod portion with a threaded thread, and a straight drilled portion connected to the toothed portion. The bottom of the part is connected to a ring taper surface, and a cutting edge is formed from the center of the ring taper surface to the drilling edge portion; the cutting edge of the cutting edge is used to drill the cutting metal plate to form a straight section aperture state, and then through the shank portion Screw thread into the straight section aperture And the metal plate is screwed; and the basic type of the self-drilling screw is also developed according to the metal material with rigidity, hardness and ductility.

In addition, the difference between the screw and the screw is the shape of the wood screw. Because the wood screw is a nail specially designed for wood (wood), and the wood is not steel, mainly fibrous, so the wood screw needs to be cut. Breaking the fiber and drilling deeper is completely different from the drill tail screw. Referring to the ninth to tenth drawings, the common wood screw system extends downward from the head (3) to form a rod portion (4), and the rod portion (4) is divided into a flat end (41) and a tip. The tapered screw-in end (42) is further provided with a threaded section (43) from the flat end (41) of the rod portion (4) to the screw-in end (42), so that the wood screw can be tapped by the screw-in end (42) The workpiece is inserted into the workpiece and locked into the workpiece through the threaded section (43).

However, the wood screw is tapped by a screw-in end (42) with a pointed end at the end, but the hole is not drilled first, so when the screw-in end (42) is tapped, the taper is screwed in. The threaded section (43) on the end (42) forces the force to break into the wooden workpiece, while the threaded section (43) on the screw-in end (42) is mainly twisted to help the screw, but relatively screwed into the end The threaded section (43) of (42) cuts the mating female thread during the screwing process, but the resistance prevents the screwing, making it difficult to advance the screwing; in addition, when the threaded section (43) drills the wooden workpiece, it will produce chips. The material is liable to remain in the threaded section (43), which in turn generates frictional resistance. When the friction becomes large and the piled material cannot be discharged, the hole of the wooden workpiece is easily squeezed to cause cracking, thereby causing the structure of the wooden workpiece. Damaged, making wooden workpieces insufficiently strong and not durable.

Therefore, conventional wood screws do not effectively discharge the debris generated during the screwing process, so the actual use of the wood screws may cause the screwing process to be time consuming and difficult to screw in due to resistance; Since a large amount of debris remains in the workpiece and cannot be discharged, the debris is pressed by the screw of the wood screw, and then the workpiece is pressed, which is liable to cause cracking of the workpiece.

The reason is that the inventor has been rich in design and development and practical production experience of the relevant industry for many years, and has researched and improved the existing structure to provide a kind of wood screws for the purpose of achieving better practical value.

The main object of the present invention is to provide a wood screw, in particular to a wood screw which is specialized in wood material and has a function of facilitating screwing and chip removal.

The main purpose and effect of the wood screw of the present invention are achieved by the following specific technical means: it mainly comprises a screw head and a rod body, wherein the rod body is provided with the screw head at the top end, and the rod body is divided into a shaft portion and a screw-in section, the shaft portion is a flat surface and is provided with a thread, and the screw-in portion is coupled to the bottom of the shaft portion and forms a tapered flat surface, which is characterized by At least one cutting unit is disposed on the tapered surface of the screw-in section, and the cutting unit can form a concave portion, a convex portion or a concave-convex combined shape; thereby, when the screw is screwed, the cutting can be performed by the screwing end The unit corresponds to the cutting and cutting action of the workpiece to achieve the effect of screwing in and chipping.

A preferred embodiment of the wood screw of the present invention, wherein the cutting unit is a cutting groove, and the cutting groove has the function of cutting fibers and chipping to prevent the debris from being concentrated and retained when screwing in.

A preferred embodiment of the wood screw of the present invention, wherein the cutting unit is a cutting rib, and the cutting rib has a function of breaking the fiber and discharging the chip to prevent the debris from being concentrated and retained when screwing in.

A preferred embodiment of the wood screw of the present invention, wherein the cutting unit comprises a cutting groove and a cutting rib, the cutting groove is coupled to the cutting rib on one side, thereby having a concave-convex design and cutting and breaking fibers And can improve the chip space and chip removal effect.

A preferred embodiment of the wood screw of the present invention, wherein the cutting unit is in contact with the thread of the shaft portion, intersects or forms a hollow portion at the junction of the two.

A preferred embodiment of the wood screw of the present invention, wherein the length of the screw-in section is dependent on the number of cutting units.

A preferred embodiment of the wood screw of the present invention, wherein the cutting groove or the cutting rib has a cross-sectional shape of a semicircular cross section, a triangular cross section or a rectangular cross section.

this invention:

(1)‧‧‧Snail head

(2) ‧ ‧ rod body

(21)‧‧‧ rod body

(211)‧‧‧ thread

(22) ‧‧‧Segment

(220)‧‧‧ pointed straight surface

(A)‧‧‧Cutting unit

(221)‧‧‧Cutting groove

(222)‧‧‧Cutting ribs

existing:

(3) ‧ ‧ head

(4) ‧‧‧ pole

(41) ‧ ‧ straight end

(42) ‧‧‧Spinning end

(43)‧‧‧Thread segments

The first figure is a schematic view of a stereoscopic appearance of a first embodiment of the present invention (single track)

Second Figure: A partially enlarged schematic view of a single-pass cutting groove according to an embodiment of the present invention

The third figure: a partial enlarged schematic view of a double-cutting groove in the embodiment of the present invention

Fourth figure: a schematic view of a stereoscopic appearance of a second embodiment of the present invention (single track)

Fig. 5 is a partially enlarged schematic view showing the single-pass cutting rib of the second embodiment of the present invention

Figure 6 is a partially enlarged schematic view showing the double-cut cutting rib of the second embodiment of the present invention

Figure 7 is a partially enlarged schematic view showing the single-pass cutting groove and the cutting rib of the third embodiment of the present invention

Eighth: a partial enlarged schematic view of a three-way cutting groove and a cutting rib according to an embodiment of the present invention

Figure IX: Schematic diagram of the prior art

Figure 10: Partial enlarged view of the prior art

For a more complete and clear disclosure of the technical content, the object of the invention and the effects thereof achieved by the present invention, as will be described in detail below, please refer to the drawings and drawings. Practical application of technology and means, which mainly include: a screw head and a rod body, wherein the top end of the rod body is provided with the screw head portion, the rod body is divided into a shaft portion and a screw-in section, the shaft portion is a flat surface and is provided with a thread. The screw-in section is coupled to the bottom of the shaft portion and forms a tapered flat surface, wherein the screw-in section has at least one cutting unit on the tapered surface; The cutting unit mainly has three implementation states, which are described as follows:

Embodiment 1: Please refer to the first to third figures, which mainly include: a screw head (1); a rod body (2), which is integrally connected by the bottom end of the screw head (1) The rod body (2) is divided into a shaft section (21) and a screw-in section (22), the shaft section (21) is a flat surface and is provided with a thread (211), and the screw-in section ( 22) engaging at the bottom of the shaft section (21), and the screw-in section (22) has a tapered straight surface (220) and is provided on the tapered flat surface (220) A groove (221) is cut in one.

The at least one cutting groove (221) is one or more cutting grooves (221), and further represents a single cutting groove (221) [as shown in the first and second figures] and the double channel. Cutting groove (221) [as shown in the third figure], further the cutting groove (221) may be obliquely disposed on the tapered flat surface (220) [not shown], or the spiral is disposed on Conical flat surface (220) [as shown in the first to third figures]; when in actual use, in the end face of a wooden workpiece that has not been drilled first, using a screw-shaped tip-shaped screw-in section (22 ), when the screw-in section (22) is tapped into the lock, the screw-in resistance is reduced by the tapered flat surface (220), so as to achieve the effect of facilitating quick screw-in, and by cutting the groove ( 221) The sharp-angle cutting surface formed by the end face corresponds to the cutting of the wooden workpiece, and the cutting of the wood fiber can be effectively and quickly cut, and the cuttings generated by the cutting and drilling can further pass through the cutting. The groove (221) is cut to accommodate the guide chip, and then the chip removal is assisted by the thread (211) of the shaft section (21).

In summary, the wood screw of the present invention maintains a tapered flat surface (220) in the screw-in section (22) without the looping thread design, using a smooth taper screw-in section (22) under low resistance conditions. It is convenient and quick to screw into the wooden workpiece [or non-steel material], and the thread segment of the conventional screw-in end is formed to have a resistance to hinder the screwing when the threaded portion is cut into a matching female thread. Therefore, the present invention The pointed surface of the wood screw screwed into the segment (22) has the effect of quickly screwing into the wooden workpiece, and the sharp cutting surface corresponding to the end face of the cutting groove (221) at the same time after the quick screwing is corresponding to the cutting wood The workpiece, and the cutting process can be pre-drilled with the cutting groove (221) to assist the screw-in section (22) to quickly screw in and chip the chip, so that the wood screw is screwed in more quickly.

Embodiment 2: Please refer to the fourth to sixth figures, which mainly include: a screw head (1); a rod body (2), which is integrally connected by the bottom end of the screw head (1) The rod body (2) is divided into a shaft section (21) and a screw-in section (22), the shaft section (21) is a flat surface and is provided with a thread (211), and the screw-in section ( 22) engaging at the bottom of the shaft section (21), and the screw-in section (22) has a tapered straight surface (220) and is provided on the tapered flat surface (220) A rib (222) is cut in one piece.

The at least one cutting rib (222) is one or more cutting ribs (222), and further represents a single cutting rib (222) [as shown in the first and second figures] and the double channel. Cutting ribs (222) [as shown in the third figure], further the cutting ribs (222) may be obliquely disposed on the tapered flat surface (220) [not shown], or the spiral is disposed on Conical flat surface (220) [as shown in Figures 4-6]; when actually used, woodwork without prior drilling The end face of the piece is tapped by the taper-shaped screw-in section (22) at the end of the wood screw, and when the screw-in section (22) is tapped into the lock, the screw-in resistance is reduced by the tapered flat surface (220). In order to achieve the convenience of quick screwing, and by cutting the ribs (222) to break the fibers corresponding to the wooden workpiece, the wood screws can be quickly screwed in after cutting the wood fibers, and the chips generated by the broken fibers can be further The chip is discharged through the space between the cutting rib (222) and the tapered flat surface (220) of the screwing section (22), and assists in guiding the chip discharge through the shaft section (21) thread (211) while locking In this way, the wood screw can be screwed into the wooden workpiece more conveniently and quickly, and the effect of the attack and lock is stabilized.

Further, the design of the wood screw of the present invention for maintaining the tapered flat surface (220) in the screw-in section (22) without the looping thread, using a smooth taper screw-in section (22) under low resistance conditions It can be easily and quickly screwed into a wooden workpiece [or non-steel material]. When the threaded section on the screw-in end is cut into a matching female thread during the screw-locking process, resistance will be hindered, so this is a problem. The tapered flat surface (220) of the screw screwing section (22) of the invention has the effect of rapidly screwing into the wooden workpiece, and is cut at an acute angle after the rapid screwing in and at the same time by the convex end surface of the cutting rib (222). The surface corresponds to the cutting of the wooden workpiece fiber, and the cutting process can be pre-drilled by the cutting rib (222) to assist the screwing-in section (22) to quickly screw in and use the gap to assist the chip removal, so that the wood screw is screwed in. fast.

Embodiment 3: Please refer to the seventh to eighth figures, which mainly include: a screw head (1); a rod body (2) which is integrally connected by the bottom end of the screw head (1) The rod body (2) is divided into a shaft section (21) and a screw-in section (22), the shaft section (21) is a flat surface and is provided with a thread (211), and the screw-in section ( 22) engaging at the bottom of the shaft section (21), and the screw-in section (22) has a tapered flat surface (220) and is in the shape of a pointed cone The straight surface (220) is provided with at least one cutting unit (A), and the cutting unit (A) comprises a cutting groove (221) and a cutting rib (222), and the cutting groove (221) penetrates into the The tapered flat surface (220) is joined to the cutting rib on the side of the cutting groove (221), and the cutting rib protrudes from the tapered flat surface (220).

As in the above two embodiments, the cutting unit (A) consisting of the cutting groove (221) and the cutting rib (222) may be one or more, and the drawing represents a single cutting unit (A) [such as the seventh As shown in the figure] and the double-pass cutting unit (A) [as shown in the eighth figure], the cutting unit (A) may be disposed obliquely on the tapered flat surface (220) [not shown] Or spirally disposed on the tapered flat surface (220) [as shown in the seventh to eighth figures]; when in actual use, as in the above two embodiments using the operational functions, and collecting the effects of the above two embodiments, let The tapered flat surface (220) of the screw-in section (22) has the effect of rapidly screwing into the wooden workpiece, and after the rapid screw-in and at the same time, the cutting groove (221) and the cutting rib (222) are concave and convex. The sharp-angle cutting surface formed by the end face corresponds to the cutting of the wooden workpiece fiber, and the cutting process can be pre-drilled by the cutting groove (221) and the cutting rib (222) to assist the screwing-in section (22) to be quickly screwed in and can be lifted. The chip space and the chip removal effect make the wood screws screw faster.

Further, when the wood screw of the present invention is in use, the cutting unit (A) and the shaft section (21) thread (211) can be connected, intersect or form a hollow section at the junction; and The length of the screwing section may be determined according to the number of the cutting unit (A), and the cutting groove (221) or the cutting rib (222) of the further cutting unit (A) can be adjusted according to the hardness of different workpieces. To the angle], the tip of the screw-in section (22) gradually cuts the workpiece, and the chip of the workpiece is discharged through the rotating cutting unit (A), so that the more the number of the cutting unit (A), the faster the workpiece can be removed. material.

In addition, within a certain range, the larger angle can increase the number of cutting units (A) that are simultaneously tapped, thus reducing the impact of the screwing process and increasing the smoothness (but the axial resistance also increases). In the embodiment of the wood screw of the present invention, the cross-sectional shape of the cutting groove or the cutting rib may be a semi-circular cross section, a triangular cross section or a rectangular cross section.

However, the above-described embodiments or drawings are not intended to limit the structure or the use of the present invention, and any suitable variations or modifications of the invention will be apparent to those skilled in the art.

From the above, the composition and use of the structure of the present invention show that the present invention has the following advantages as compared with the existing structure:

1. The wood screw of the invention adopts a wood screw to maintain a pointed straight flat surface in the screwing section, and the design of the uncircular thread adopts a smooth taper screwing section in a low resistance state, which can be conveniently and quickly screwed in. The effect of wooden workpieces.

2. The wood screw of the invention can effectively cut the workpiece and assist in accommodating the chip by the setting of the cutting groove, and can cooperate with the thread of the shaft to guide the chip removal while locking, so that the wood screw can be more conveniently and quickly rotated. Into the wooden workpiece, to achieve fast attack and stability.

3. The wood screw of the invention can effectively cut off the workpiece by the cutting rib and cooperate with the space between the straight surfaces of the tapered surface of the screw to be chipped, and is assisted by the thread of the shaft while being locked. Export chip removal, so that wood screws can be more easily and quickly screwed into wooden workpieces to achieve fast attack and stability.

4. The wood screw of the invention, by the double arrangement of the cutting groove and the cutting rib, has the cutting and breaking fiber, can be used in the cutting process to pre-drill the cutting groove and the cutting rib to assist the screwing section. Quickly screw in and increase the chip space and chip removal effect, making the wood screws screw faster.

In summary, the embodiments of the present invention can achieve the expected use efficiency, and the specific structure disclosed therein has not been seen in similar products, nor has it been disclosed before the application, and has completely complied with the provisions of the Patent Law. And the request, the application for the invention of a patent in accordance with the law, please forgive the review, and grant the patent, it is really sensible.

Claims (2)

A wood screw mainly comprises: a screw head; a rod body integrally connected by a bottom end of the screw head, the rod body being divided into a shaft body section and a screwing section, wherein the shaft body is a straight surface and a loop, wherein the screw-in section is coupled to the bottom of the shaft portion, and the screw-in section has a tapered flat surface and is disposed on the tapered flat surface At least one cutting unit, the cutting unit includes a cutting groove and a cutting rib, the cutting groove penetrates the tapered surface and joins the cutting rib on a side of the cutting groove The cutting rib protrudes from the tapered straight surface. The wood screw of claim 1, wherein the cutting unit is in contact with the thread of the shaft portion, intersects or forms a hollow portion at the junction of the two.