TWI626384B - Plastic screw anchor drill tail protection structure - Google Patents

Abstract

The utility model relates to a plastic screw anchor drill tail protection structure, which comprises: a screw anchor integrally formed with a screw locking portion, a screw portion and a drill tail portion, the screw lock portion is formed with a top ring, and a locking hole is formed in the center of the top ring The screwing portion is provided with a first external thread, and the screw portion is inserted through a pressing hole, and the pressing hole communicates with the locking hole, and the drill tail portion defines a pointed hole, and the pointed hole communicates with the Squeezing the hole, and opening a slit corresponding to the pointed hole in the tail portion of the drill, the screw portion is formed with a second external thread, and a plurality of slots are axially opened in the screw portion, and the surface of the drill tail is covered There is a protective layer, by which the structural strength of the drill tail is increased to prevent crack damage during the screw anchoring.

Description

Plastic screw anchor drill tail protection structure

The invention relates to a screw anchor structure, in particular to a plastic screw anchor drill tail protection structure capable of improving the deformation stability thereof.

According to the conventional method of fixing an object to a board such as a gypsum board, a plastic board or a wooden board, the object is mainly fixed or hung by a steel nail. However, since one end of the steel nail is subjected to weight, The piercing is placed on the end of the plate to form an upturn, so that the hole pierced by the steel nail is more digging and less loaded, and there is a situation that it will fall off at any time, and in order to overcome the above-mentioned deficiency, the conventional method will be changed to the anchor method. Fixed, mainly by drilling holes at predetermined positions on the plate, then inserting the plastic screw anchor into the hole, and finally screwing it to the central hole of the screw anchor, and using the screw to lock in the direction The external expansion function allows the positioning convex teeth on the outside of the screw anchor to be fixed in the hole. In practical applications, the hole must be drilled before the screw anchor can be inserted into the hole, and then the screw is locked into the screw anchor. The whole process is quite cumbersome and inconvenient. Another way is that the screw anchor can be drilled independently with a pointed tip, thereby eliminating the pre-drilling operation. It is not difficult to find out that the above-mentioned conventional structure has some shortcomings. The main reasons are as follows: If the tip of the screw anchor is not opened separately, it will cause the screw to penetrate the screw anchor, and the position of the screw through the tip is not easy to control, so that the effect of the screw anchor expansion is reduced, and vice versa. The crack is opened at the head, although the screw can be smoothly worn out, but the structural strength of the pointed end is also reduced, and the tip is easily damaged early in the pre-drilling, and the plate cannot be effectively penetrated, so that it cannot be overcome at the same time. The structural strength at the time of the hole is insufficient and the lack of stable through-screws cannot be achieved.

In view of this, the inventors have been engaged in the manufacturing development and design experience of related products for many years, and after detailed design and careful evaluation of the above objectives, the present invention has finally become practical.

The technical problem to be solved by the present invention is to provide a plastic screw anchor drill tail protection structure against the above-mentioned defects existing in the prior art.

A screw anchor integrally has a screw locking portion, a screw portion and a drill tail portion. The screw locking portion is formed with a top ring, and a locking hole is defined in a center of the top ring, and the screw locking portion is extended from the top ring toward the screw portion. a first external thread, the screw portion is inserted through a pressing hole, and the pressing hole communicates with the locking hole, and the drill tail portion defines a pointed hole, and the pointed hole communicates with the pressing hole and is drilled a slit corresponding to the pointed hole is formed in the tail portion, and the screw portion is formed with a second external thread, and a deformation ring groove is recessed in the middle portion of the screw portion, and the second external thread is axially cut at the screw portion. a plurality of slots are formed in the deformation ring groove, a screw is formed with a head portion, a rod portion and a tip portion, and the screw extends from the tip portion to the rod portion with a third external thread, and the screw is driven by the head. The locking is formed in the locking hole, the pressing hole and the pointed hole of the screw anchor to form a through hole, and the outer diameter of the third external thread is slightly larger than the pressing hole and the pointed hole of the screw anchor, and the drilling tail surface is covered a protective layer, by which the structural strength of the drill tail is increased, Locking screws anchored to the generation of cracks damaged during drilling.

Wherein, the keyhole has a cross hole shape.

Wherein, the second external thread is spaced apart by a flat external thread, and the external thread of the flat head improves the anti-dusting effect.

Wherein the drill tail is symmetrically formed with a plurality of nails and a plurality of drill teeth, The drill bit forms a drilling effect and the nail has a balanced hole expanding effect.

A first main object of the present invention is that the surface of the tail portion of the drill is covered with a protective layer, and the protective layer covered by the drill tail portion is not limited to what kind of material. Since the tail portion of the drill has a pointed hole and a crack, the protective layer is not provided. In the state, it is easy to uncontrollable cracking from the crack, and the protective layer can resist the pulling force during drilling, thereby effectively preventing the screw anchor from being cracked prematurely and being damaged, and preventing the screw from being broken when drilling. damage.

A second main object of the present invention is that the drill tail is symmetrically formed with a plurality of nails and a plurality of drill teeth, and the drill bit of the drill tail forms a drilling function, and a hole expanding effect is formed when the nail is inserted into the wood board. And the nail is symmetrically inserted into the wooden plate to form a balance function, so that the screw anchor is locked when the lock is not inserted, so that the drilling process is smoother.

A third main object of the present invention is that the drill tail portion has a pointed hole, and the pointed hole communicates with the pressing hole, and a slit communicating with the pointed hole is formed in the drill tail portion, so that the tip end of the screw can Drill through the screw tail of the screw anchor, and cooperate with the crack to control the cracking position, so that the tip of the screw can be stably penetrated from the crack, so as to achieve the purpose of controlling deformation and anchoring.

Other objects, advantages and novel features of the invention will be apparent from the description and appended claims.

[this creation]

10‧‧‧ screw anchor

11‧‧‧Silver lock

111‧‧‧Top ring

112‧‧‧Keyhole

113‧‧‧First external thread

12‧‧‧ Screw Department

121‧‧‧Extrusion holes

122‧‧‧Second external thread

123‧‧‧Transformation ring groove

124‧‧‧ slotting

125‧‧‧Flat external thread

13‧‧‧Drill tail

131‧‧‧ pointed holes

132‧‧‧Rip

133‧‧ ‧ teeth

134‧‧‧Drilling

14‧‧‧Protective layer

20‧‧‧ screws

21‧‧‧ head

22‧‧‧ rod segments

23‧‧‧ tip

24‧‧‧ Third external thread

30‧‧‧Wood sheet

Figure 1 is a perspective view of the present invention.

Figure 2 is a cross-sectional view of the present invention.

Fig. 3 is a schematic view showing the state of use of the present invention (1).

Fig. 4 is a schematic view showing the state of use of the present invention (2).

Fig. 5 is a schematic view showing the state of use of the present invention (3).

Fig. 6 is a schematic view showing the state of use of the present invention (4).

Fig. 7 is a schematic view showing the state of use of the present invention (5).

Fig. 8 is a schematic view showing the state of use of the present invention (6).

Figure 9 is a schematic view showing the state of use of the present invention (7).

Fig. 10 is a schematic view showing the state of use of the present invention (VIII).

In order to enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following [simplified description of the drawings] as follows: First, please see the views shown in Figures 1 and 2. The utility model relates to a plastic screw anchor drill tail protection structure, which comprises: a screw anchor 10 and a screw 20, a screw anchor 10 integrally formed with a screw lock portion 11, a screw portion 12 and a drill tail portion 13, the screw lock portion A top ring 111 is formed in the center of the top ring 111, and a cross-shaped locking hole 112 is defined in the center of the top ring 111. The screw portion 11 extends from the top ring 111 to the screw portion 12 to have a first external thread 113, and the screw portion 12 There is a pressing hole 121, and the pressing hole 121 communicates with the locking hole 112. The drill tail 13 defines a pointed hole 131, and the pointed hole 131 communicates with the pressing hole 121 and is opened at the drill tail portion 13. The screw portion 12 is formed with a second external thread 122, and a deformation ring groove 123 is recessed in the middle portion of the screw portion 12, and is axially cut at the screw portion 12. The second external thread 122 and the deformation ring groove 123 are provided with a plurality of slots 124, and the second The thread 122 is spaced apart by a flat external thread 125 to improve the anti-dusting effect by the flat external thread 125. The drill tail 13 is symmetrically formed with a plurality of teeth 133 and a plurality of drill 134, and the drill 134 forms a drill hole. The effect and the nail 133 form a balanced hole expanding effect, and a screw 20 is formed with a head 21, a rod segment 22 and a The tip portion 23 defines a third external thread 24 extending from the tip portion 23 to the rod portion 22. The screw 20 is driven by the head portion 21 to be sequentially locked to the locking hole 112 and the pressing hole 121 of the screw anchor 10. The outer diameter of the third external thread 24 is slightly larger than the pressing hole 121 and the pointed hole 131 of the screw anchor 10, wherein the surface of the drill tail 13 is covered with a protective layer 14 The structural strength of the drill tail portion 13 is increased by the protective layer 14 to prevent cracking damage of the screw anchor 10 during drilling.

For the actual use, please view it as shown in the second, third, and fourth figures. The screw anchor 10 is inserted into the lock hole 112 of the screw lock portion 11 by a hand tool (not shown) to form a coordinated rotation. The anchor 10 drills the wood board 30 with the drill tail 13 having the protective layer 14, and the drilling 134 of the drill tail 13 forms a drilling function, and forms a reaming effect when the nail 133 is inserted into the wood board 30, and The nail plate 133 is symmetrically inserted into the wooden board 30 to form a balance function, so that the screw anchor 10 does not have a deviated drilling when locked, so that the drilling process is smoother, as long as the structural strength of the drill tail portion 13 can be improved. The protective layer 14 covered by the drill tail portion 13 is not limited to what kind of material. Since the drill tail portion 13 is provided with the pointed hole 131 and the crack 132, the crack 14 is easily cracked without the protective layer 14 and the protection is utilized. The layer 14 can resist the pulling force during the drilling, thereby effectively preventing the screw anchor 10 from being cracked prematurely, and the screw anchor 10 is sequentially the second external thread 122 of the screw portion 12 and the second screw portion 11 An external thread 113 locks into the wooden panel 30 and cooperates with the flat head The thread 125 improves the effect of the anti-dusting effect. When the screw anchor 10 is worn through the wooden board 30, please refer to the figure 5 to the figure 10, and the screw 20 is inserted into the lock of the screw anchor 10 with the tip 23. The hole 112 and the third external thread 24 of the screw 20 lock the pressing hole 121 of the screw anchor 10, and the third external thread 24 forms a tapping force on the pressing hole 121, and the screw portion 12 is formed to be squeezed. Expanding, and the slot 124 of the screw anchor 10 can increase the deformation amount thereof, so that it can be easily expanded and deformed, and when further locked, the tip end portion 23 of the screw 20 can drill through the drill tail portion of the screw anchor 10. 13, and the crack 132 is controlled to control the cracking position, so that the tip portion 23 of the screw 20 can be stably passed through the slit 132, and then the screw 20 is continuously rotated, and the third external thread 24 of the screw 20 will be Engaging the tip end hole 131 of the drill tail portion 13 to rotate the drill tail portion 13 in the direction of the screw lock portion 11, and further passing the deformation ring groove 123 to cause the screw portion 12 to be outwardly convexly deformed from the middle portion, thereby stabilizing Forming the screw portion 12 produces a torsional crimp deformation, thereby blocking the function of the wood board 30 to be anchored and fixed.

With the structure of the above specific embodiment, the following benefits can be obtained: (1) the surface of the drill tail portion 13 is covered with a protective layer 14, and the protective layer 14 covered by the drill tail portion 13 is not limited to what kind of material, because the drill tail portion 13 is provided with a pointed hole 131 and a slit 132, so that it is easily uncontrolled by the crack 132 in the state without the protective layer 14, and the protective layer 14 can resist the pulling force during drilling, thereby effectively preventing the screw. The anchor 10 is prematurely cracked and damaged, so as to prevent the screw anchor 10 from causing crack damage during drilling; (2) the drill tail portion 13 is symmetrically formed with a plurality of nails 133 and a plurality of drill teeth 134, and the drill tail portion 13 The drill bit 134 forms a drilling function, and forms a reaming effect when the nail 133 is inserted into the wood board 30, and inserts the wooden board 30 symmetrically by the nail 133 to form a balance function, so that the screw anchor 10 does not lock when locked. The drilling process occurs to make the drilling process smoother. (3) The drill tail portion 13 defines a pointed hole 131, and the pointed hole 131 communicates with the pressing hole 121, and a communication hole is formed in the drill tail portion 13. a slit 132 of the pointed hole 131, such that the screw 20 The tip portion 23 can drill through the drill tail portion 13 of the screw anchor 10, and cooperate with the crack 132 to control the cracking position thereof, so that the tip portion 23 of the screw 20 can stably pass through the crack 132 to achieve the control deformation anchor. For the purpose of use.

In summary, the present invention has indeed achieved a breakthrough structural design, and has improved invention content, while at the same time achieving industrial utilization and progress, and the present invention is not found in Any publication is also novel. When it complies with the relevant provisions of the Patent Law, it submits an application for a patent for invention according to law, and invites the examination committee of the bureau to grant a legal patent right.

The above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; that is, the equivalent variations and modifications made by the scope of the present invention should still belong to the present invention. Within the scope of the patent.

Claims (5)

A plastic screw anchor drill tail protection structure includes: a screw anchor integrally formed with a screw lock portion, a screw portion and a drill tail portion, the screw lock portion is formed with a top ring, and the center of the top ring a locking hole is defined, and the screw locking portion has a first external thread extending from the top ring toward the screw portion, and the screw portion has a pressing hole through, and the pressing hole communicates with the locking hole, and the drill tail portion has a tip a head hole, and the tip hole communicates with the pressing hole, and a slit communicating with the tip hole is formed in the drill tail portion, and the screw portion is formed with a second external thread, and a deformation ring is concave in the middle portion of the screw portion a groove, and the second external thread and the deformation ring groove are axially cut at the screw portion, and a plurality of slits are formed, and the surface of the drill tail is covered with a protective layer, and the protective layer improves the structural strength of the drill tail portion.俾 to prevent crack damage when the screw is anchored to the hole. The plastic screw anchor drill tail protection structure according to claim 1, further comprising a screw, the screw forming a head, a rod segment and a tip portion, the screw extending from the tip portion to the rod portion a three-outer thread, wherein the screw is sequentially locked to the locking hole, the pressing hole and the pointed hole of the screw anchor to form a thread, and the outer diameter of the third external thread is slightly larger than the screw anchor Pressed holes and pointed holes. The plastic screw anchor drill tail protection structure according to claim 1, wherein the lock hole has a cross hole shape. The plastic screw anchor drill tail protection structure according to claim 1, wherein the second external thread is spaced apart by a flat external thread, and the external thread of the flat head improves the anti-dusting effect. The plastic screw anchor drill tail protection structure according to claim 1, wherein the drill tail is symmetrically formed with a plurality of nails and a plurality of drill teeth.