TWI640695B - Wood screw (2) - 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 at least one concave cutting groove and a thread protruding from the flat surface, and the screwing portion is engaged with the bottom of the shaft portion and forms a tapered flat surface. And the conical straight surface of the screwing portion corresponds to the concave cutting groove and all or selective portions are continuously provided with a concave turning groove; thereby, the smooth tapered surface is used under low resistance It can be screwed into the workpiece quickly, and when the screw is screwed, it can be rotated and cut by the concave turning groove in the screw-in end to achieve the effect of pre-drilling to facilitate screwing and chip removal.

Description

Wood screw (2)

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 eighth figure, 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 tapered shape. The screw-in end (42), and then the threaded section (43) is looped from the flat end (41) of the rod portion (4) to the screw-in end (42), so that the wood screw can be tapped into the workpiece by the screw-in end (42). And locked into the workpiece through the thread segment (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, the conventional wood screw does not effectively discharge the debris generated during the screwing process, so the actual use of the wood screw may cause the screwing process to be time consuming, because the threaded section of the wood screw (43) cannot Effectively discharge the wood chips generated during the screwing process, leaving the wood chips in the workpiece The inside cannot be discharged, and it is also more laborious when screwing in. What is more, since a large amount of debris remains in the workpiece, 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.

For this reason, the inventor's previous research and development application has the Taiwan Patent Publication No. 556784 "screw improvement", the surface of the screw has a thread, and gradually spirals from the screw-in end to the vicinity of the end; the feature is: There is a concave cutting groove; this can make the screw have the functions of cutting and collecting chips when screwing in to increase the smooth operation of the screwing.

The above structure utilizes the concave cutting groove to have a good collecting effect on the chips generated inside the workpiece, and the shortcomings of the crushing crack caused by the forced outward pressing of the inner hole of the workpiece in the prior art can be effectively improved. The problem of workpiece cracking; today, the inventor in the spirit of excellence, and uphold the rich experience of design and development and practical production of the relevant industry for many years, in particular to provide a kind of wood screws, in order to achieve 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 at least one concave cutting groove and a thread protruding from the flat surface, and the screw-in portion is connected to the bottom of the shaft portion. Forming a tapered straight surface, and the tapered straight surface of the screwing portion corresponds to the concave cutting groove and all or a selective portion is continuously provided with a concave turning groove; thereby, a smooth tip is utilized The tapered flat surface can be screwed into the workpiece quickly under low resistance, and when the screw is screwed, the rotary cutting groove corresponding to the workpiece can be rotated and cut by the screw-in groove. The effect of chip removal.

A preferred embodiment of the wood screw of the present invention, wherein the concave cutting groove on the shaft section is obliquely spirally distributed on the flat surface, and the concave groove is inclined by the concave cutting groove A spiral state is distributed over the tapered surface of the screw-in section.

this invention:

(1)‧‧‧Snail head

(2) ‧ ‧ rod body

(21)‧‧‧ rod body

(210)‧‧‧Single surface

(22) ‧‧‧Segment

(220)‧‧‧ pointed straight surface

(23) ‧‧‧ concave cutting groove

(24)‧‧‧Thread

(25) ‧‧‧ concave turning groove

existing:

(3) ‧ ‧ head

(4) ‧‧‧ pole

(41) ‧ ‧ straight end

(42) ‧‧‧Spinning end

(43)‧‧‧Thread segments

First Figure: Schematic diagram of the three-dimensional appearance of the present invention

Second Figure: A partial enlarged view of the present invention

Third Figure: Side view of the present invention

Fourth figure: a perspective view of the present invention viewed from the bottom

Fig. 5 is a cross-sectional view showing the entire continuation of the concave turning groove of the present invention

Figure 6 is a cross-sectional view showing a continuation of the concave groove portion of the present invention

Figure 7: Schematic diagram of another embodiment of the present invention

Figure 8: Schematic diagram 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. For practical application of techniques and means, please refer to the first to fourth figures, which are the three-dimensional appearance, partial enlargement and side view of the wood screws of the present invention, which mainly include: a screw head (1); a rod body (2) ), the rod body (2) is divided into a shaft section (21) and a screw-in section (22), and the shaft section (21) is flat. The straight surface (210) is annularly provided with at least one concave cutting groove (23) and a thread (24) protruding from the flat surface (210), and the screwing section (22) is coupled to the shaft portion (21) the bottom portion and forming a tapered flat surface (220), and the screw-in section (22) has a tapered flat surface (2) 20) A recessed cutting groove (25) is provided for all or a part of the recessed cutting groove (23).

Please refer to the fifth to sixth figures for the manner in which the inner concave turning groove (25) adopts all or selective partial continuation settings, as shown in the fifth figure, for example 1: when the shaft section (21) When the upper surface (210) of the flat surface (210) is provided with six concave cutting grooves (23), the concave turning groove (25) corresponds to six concave cutting grooves (23) and all six continuous concave cutting grooves are extended ( 25); Example 2: As shown in the sixth figure, when the flat surface (210) of the shaft section (21) is provided with six concave cutting grooves (23), the inner concave turning groove (25) Correspondingly, three (or two) concave cutting grooves (23) are selected and partially extended to form three [or two] inner concave turning grooves (25); however, the selective portion continues the selection interval. The number of intervals can be determined by factors such as the actual implementation, the length of the workpiece or the length of the screwing section, and the like.

Continued, in actual use, in the end face of the wooden workpiece without the prior drilling, using the screw-shaped screw-in section (22) at the end of the wood screw, when the screw-in section (22) is tapped into the lock, borrow The screwing resistance is reduced by the tapered flat surface (220) to achieve the effect of facilitating rapid screwing, and the sharp cutting surface formed by the end surface of the concave turning groove (25) corresponds to the cutting of the wooden workpiece, and is cut by cutting. The wood fiber can be effectively cut quickly, and the wood fiber cut by cutting can be quickly screwed in, and the chip generated by the cutting drill can further receive the chip guide through the concave turning groove (25), and then through the shaft section (21) Thread (211) assists in the export of chip removal.

Then, the wood screw is forcibly screwed into the workpiece by using a thread (24) protruding from the flat surface (210) of the shaft portion (21), and then recessed through the flat surface (210). The cutting groove (23) is used as a cutting chip at the same time; thus, it is not forced to be squeezed outward as conventionally, so that the urgency of screwing in can be greatly reduced to effectively avoid the crack generated by forced screwing.

In summary, when the wood screw of the present invention is screwed in, the screw-in section (22) is used to maintain the tapered flat surface (220) without the ring thread design, and the smooth taper screw-in section (22) is utilized. In the low-resistance state, it can be easily and quickly screwed into the wooden workpiece [or non-steel material], and the threaded section on the screw-in end will have a resistance to hinder the screwing when the threaded part of the screw-in process is cut. Therefore, the tapered flat surface (220) of the screw screwing section (22) of the present invention has the effect of quickly screwing into the wooden workpiece, and is fastened after the screwing and simultaneously by the end surface of the concave turning groove (25) The sharp-angle cutting surface corresponds to the cutting of wooden workpieces [or non-metallic materials], and the cutting process can use the concave turning groove (25) to assist the chip removal, so that the wood screws can be screwed in more quickly.

Continued, in the screwing process, the amount of the inner concave groove (23) on the straight surface (210) of the shaft section (21) can be simultaneously increased to reduce the forced pressing phenomenon of the cutting fiber, so as to achieve considerable The degree and effective effect of collecting dust, so that it will not be completely filled by the cutting chips before the screwing is completely inserted, causing difficulty in cutting or screwing in, but a proper filling. Moreover, when the wood screw is fully screwed in, the proper cutting of the cutting chip can be more tightly pressed with the screw that is screwed in, so as to effectively increase the bonding strength of the workpiece.

Further, the actual implementation state of the present invention is that the concave cutting groove (23) on the shaft section (21) is obliquely spirally distributed on the flat surface (210), and the concave groove (25) The tapered cutting groove (23) is distributed in the inclined spiral state to be distributed on the tapered straight surface (220) of the screwing section (22).

Furthermore, the wood screw of the present invention may have the same cross-sectional shape formed by both the concave cutting groove (23) of the shaft section (21) and the concave turning groove (25) of the screwing end (22). Differently, for example, the section of the shaft section (21) shows that the concave cutting groove (23) is a six-way rectangular cutting groove, and the concave turning groove (25) of the screw-in end (22) is the same as a six-turn rectangular rotary groove; or the screw-in end (2 2) The concave turning groove (25) is a three-way semi-circular turning groove which is different. In addition to the cross-sectional shape, the depth and the winding angle of both the concave cutting groove (23) and the concave turning groove (25) may be the same or different [shown in the third and seventh figures].

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 concave turning groove, and can assist the blade to be outputted while being locked with the thread of the shaft, so that the wood screw can be more convenient and quick. Screw into the wooden workpiece to achieve fast attack and stability.

3. The wood screw of the invention, when the screw is screwed in, uses the concave turning groove to conform to the concave cutting groove, and can have a good collecting effect on the cutting chips generated inside the workpiece, and the inner hole of the workpiece is improved in the past. The disadvantage of the crushing of the screw caused by the forced extrusion of the screw ensures that the workpiece is less prone to cracking.

4. The wood screw of the invention effectively increases the volume by the design of the concave rotary groove and the concave cutting groove, and uses the concave rotary groove to achieve the cutting effect when screwing in, and can be screwed into the workpiece immediately, and at the same time Good chip collection, making it easier to screw in.

5. The wood screw of the invention utilizes the inner concave concave rotary groove and the inner cutting groove to form a proper filling condition when the screwing is completed, which can effectively increase the tightening effect and tightly bind the workpiece. Degrees are quite helpful.

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 ring having at least one concave cutting groove and a thread protruding from the flat surface, and the screwing portion is coupled to the bottom of the shaft portion and forming a tapered flat surface, and The conical straight surface of the screw-in section corresponds to the concave cutting groove and the selective portion continues to be provided with a concave turning groove, and the selective portion continues to be selected by the spacing. The wood screw according to claim 1, wherein the concave cutting groove on the shaft portion is obliquely spirally distributed on the flat surface, and the concave groove is compliant with the concave surface. The cutting groove is inclined in a spiral state and distributed on the tapered straight surface of the screwing section.