TWI649486B - Roofing screw - Google Patents

Abstract

The roof screw of the present invention mainly comprises two reamer-shaped reaming members on the shaft of the roof screw, and the two reaming members are in the form of a flattened inverted cone, and at least the protruding portion of each of the reaming members is protruded. There is a reinforcing rib to effectively increase the strength of the reaming members, thereby effectively avoiding the occurrence of wear or breakage of the reaming members during the rotary cutting process, and further making the reaming members more capable of withstanding Under the stress of the large lock and the better rotary cutting ability, the strength of the rod body is taken into consideration, so that the reaming members can quickly cut the smooth cut hole on the wave board to further improve the subsequent use. The locking effect can be closely combined with the sealing cover to achieve a good waterproof effect.

Description

Roof screw

The present invention relates to a screw design, and more particularly to a roof screw that is locked to a wave board.

Referring to FIG. 1 , the conventional wave plate screw 1 includes a rod body 11 , a screw head 12 disposed at one end of the rod body 11 , and a locking portion 13 opposite to the screw head 12 and disposed at the other end of the rod body 11 . a plurality of threaded teeth 14 disposed on the rod body 11, a reaming member 15 disposed between the screw head 12 and the threaded teeth 14, and a set of the screw head 12 and the reaming member 15 of the sealing cover 16; when the conventional wave plate screw 1 is locked, the locking portion 13 is first pressed against the surface of a wave plate 21, and a rotation is applied to the screw head 12 The torsion force causes the screw teeth 14 to be driven by the rotational torsion to drill the wave plate 21, and after the screw teeth 14 are screwed into the wave plate 21, the reaming member 15 is used to cut a larger diameter on the wave plate 21 The diameter of the rod body 11 is rotated to make a proper gap between the rotary cutting hole and the rod body 11, thereby providing an operating space required for thermal expansion and contraction or seismic shaking of the wave plate 21, and then using the sealing space. The hole cover 16 is pressed by the screw head 12, so that the hole sealing cover 16 is tightly closed on the spiral cutting hole of the wave plate 21, thereby achieving a better waterproof effect.

However, it has been found that, after the actual use, the reaming members 15 are formed by extruding a portion of the rod body 11 by two molding dies (not shown) so that the pressed portion of the rod body 11 is extended to form the expansion. The hole member 15, so that the strength of the reaming member 15 depends on the release amount of the rod body 11 when pressed and the force applied by the molding die. If the molding die is too small, it is easy to cause such a hole. The reaming member 15 cannot be effectively extended outward, so that the formed reaming members 15 cannot effectively cut the wave plate 21. If the forming molds are excessively applied, the thickness of the reaming members 15 is easily insufficient. Resulting in the occurrence of wear or breakage of the reaming members 15 during the turning and cutting process, the formation of the reaming members 15 is caused by the length and length, and the reaming members 15 are not able to effectively cut the wave plate 21, or The circumference of the rotary cutting hole which is caused by the rotary cutting is irregular, which further affects the locking effect on the subsequent use. Moreover, the reaming member 15 which is worn out cannot be evenly attached to the skeleton 22 of the wave board 21, so that the wave board is caused. The screw 1 is skewed, so that the screw head 12 and the sealing cover 16 cannot be stably In combination with the wave plate 21, the waterproof effect is further inconsistent. On the contrary, some manufacturers increase the area of the rod body 11 under pressure in consideration of the strength of the reaming member 15, which is easy to cause the strength of the rod body 11. Not as expected, and the forming of the reaming member 15 is liable to cause damage to the forming molds, which is not only easy to improve the processing difficulty, but also causes an increase in the processing cost, which is not in line with economic benefits, and needs to be improved.

Therefore, the object of the present invention is to provide a roofing screw which has a reaming member of better strength, which can greatly improve the locking stress which can be withstood by the reaming member and has better rotary cutting under the strength of the rod body. Ability to improve the locking effect of subsequent use.

Therefore, the roof screw of the present invention comprises a rod body, a screw head and a locking portion respectively disposed at two ends of the rod body, a plurality of threads arranged on the rod body, and two symmetrically formed on the rod body. a reaming member, and a sealing cover disposed between the screw head and the reaming member; wherein the two reaming members are arranged in a flat shape with an inverted cone, and the surface of each reaming member is convex There is at least one reinforcing rib; that is, the design of the reinforcing rib is utilized in the rotary cutting process, which can effectively enhance the expansion The strength of the hole member, in addition to the strength of the rod body, further enhances the locking stress and the cutting ability of the reaming member, and at the same time cooperates with the shape of the two reaming members to make the expansion The hole member can quickly cut the smooth cutting hole on the wave plate to avoid the wear or break of the hole expanding member during the rotary cutting process, thereby effectively utilizing the locking effect on the subsequent use.

(known)

1‧‧‧ wave plate screws

11‧‧‧ rod body

12‧‧‧ screw head

13‧‧‧Locking Department

14‧‧‧ thread

15‧‧‧Reaming parts

16‧‧‧Seal cover

21‧‧‧ wave board

22‧‧‧ skeleton

(this invention)

3‧‧‧ Roof screws

31‧‧‧ rod body

32‧‧‧ screw head

33‧‧‧Locking Department

34‧‧‧ thread

35‧‧‧Reaming parts

36‧‧‧Seal cover

37‧‧‧ reinforcing ribs

38‧‧‧ Groove

39‧‧‧ cutting edge

R‧‧‧ rod centerline

41‧‧‧ wave board

42‧‧‧ skeleton

Figure 1 is a schematic view of a conventional wave plate screw.

Figure 2 is a perspective view of a first preferred embodiment of the present invention.

Figure 3 is a schematic view showing the locked state of the first preferred embodiment.

Figure 4 is a schematic view of a second preferred embodiment of the present invention.

Figure 5 is a side elevational view of the second preferred embodiment.

The above and other technical contents, features, and advantages of the present invention will become apparent from the Detailed Description of the <RTIgt;

Referring to FIG. 2, in the first preferred embodiment of the present invention, the roof screw 3 includes a rod body 31, a screw head 32 disposed at one end of the rod body 31, and opposite to the screw head 32. a locking portion 33 at the other end of the rod body 31, a plurality of threaded teeth 34 screwed on the rod body 31, and two symmetrically formed on the rod body 31 and located between the screw head 32 and the threaded holes 34 a member 35, and a sealing cover 36 disposed between the screw head 32 and the reaming member 35, wherein the rod body 31 defines a rod center line R, and the two reaming members 35 are inverted The cone is arranged in a flat shape, and each of the reaming members 35 is convexly provided with at least one reinforcing rib 37, and the reinforcing rib 37 can be disposed on each of the reaming members. Or a surface of each of the reaming members 35 (not shown), and the forming and extending direction of each of the reinforcing ribs 37 can be performed according to actual use requirements. In the present embodiment, two reinforcing ribs 37 are protruded from a single surface of each of the reaming members 35, and each reinforcing rib 37 is extended outward from the rod body 31 as an example, that is, as shown in the figure. 2 is shown.

Referring to FIG. 2 and FIG. 3, when the lock cooperation is performed, the lock portion 33 is firstly abutted against the surface of a wave plate 41, and the screw head 32 is attached to the screw head 32 by a locking tool (not shown). Applying a rotational torque such that the threads 34 are driven by the rotational torsion to drill the wave plate 41, and the screws 34 are gradually cut into the wave plate 41 and continue to rotate to the skeleton 42, and the expansion When the hole member 35 is in contact with the wave plate 41, the reaming members 35 are arranged in a flat shape and are symmetrically disposed on both sides of the rod body 31 so that the reaming members 35 are cut out on the wave plate 41. The circumference of the hole is completely cut, and the design of the reinforcing rib 37 is provided on each of the reaming members 35, so that the strength of the reaming members 35 is effectively improved, except that the reaming members 35 are avoided. In the process of rotary cutting, wear, passivation, and even cracking occur, and the reaming members 35 are more capable of withstanding large locking stresses and having better turning and cutting ability. The strength of the rod body 31, thereby greatly improving the locking effect on the subsequent use, and at this time, the sealing cover 36 can be closely fitted Covered at the spiral cut hole to achieve a good waterproof effect.

Referring to FIG. 4 and FIG. 5, the second preferred embodiment of the present invention still includes the components described in the previous embodiment, and the embodiment is particularly characterized in that the thickness of each of the reaming members 35 is determined by the snail. The direction of the head 32 is tapered toward the locking portion 33 such that the side of each of the reaming members 35 is disposed in a tapered shape, and each of the reaming members 35 is disposed at an oblique angle to the center line R of the rod body. Further, a recess 38 extending from the screw head 32 toward the locking portion 33 is formed at a periphery of each of the reaming members 35, and each recess 38 is in contact with the reaming member 35. Forming a cutting edge 39; that is, the thickness of the reaming member 35 is tapered and tapered, so that the manufacturing precision of the reaming member 35 can be relatively reduced during molding, which helps to reduce the processing of the roof screw 3. Cost, in addition, the cutting edges 39 can effectively assist the reaming members 35 in the rotary cutting operation, except that the cutting screws 3 can be made more labor-saving and fast, and the chips obtained by the roof screws 3 during the rotary cutting process It can also be quickly discharged through the grooves 38, thereby effectively reducing the locking resistance generated during the cutting process, so that the locking effect can be effectively improved.

In summary, the roof screw of the present invention is symmetrically disposed on both sides of the rod body and arranged in an inverted cone shape by the two reaming members, and at least one reinforcing rib is disposed on each of the reaming members to enable The strength of the reaming members can be effectively improved, which avoids the occurrence of wear or breakage of the reaming members during the rotary cutting process, and further enables the reaming members to withstand large locking stresses, and In the case of a better rotary cutting capability, the strength of the rod body is further taken into consideration, so that the reaming members can be rotated on the wave plate to cut out the complete circular cutting hole, thereby further improving the locking effect on subsequent use, and The sealing cover can be tightly closed to the rotary cutting hole, and the waterproof effect can be better.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the description of the invention. All should remain within the scope of the invention patent.

Claims (5)

A roof screw for locking a wave board, the roof screw comprising a rod body, a screw head disposed at one end of the rod body, and a locking portion disposed at the other end of the rod body opposite to the screw head, plural a screw ring disposed on the rod body, a reaming member formed on the rod body and located between the screw head and the screw teeth, and a screw hole disposed between the screw head and the reaming member a sealing cover; wherein the rod body defines a rod center line, wherein the two reaming members are symmetrically disposed on two sides of the rod body, and the two reaming members are arranged in a flat shape of an inverted cone, and At least one reinforcing rib is protruded from each of the reaming members. The roofing screw according to claim 1, wherein the thickness of each of the reaming members is tapered by the direction of the screw head toward the locking portion to be disposed in a tapered shape. The roofing screw according to claim 2, wherein a recess is formed in a near circumference of each of the reaming members, and each of the grooves extends from the screw head toward the locking portion, and each of the slots A cutting edge is formed at a groove where the groove meets the reaming member. The roofing screw according to claim 1 or 3, wherein each of the reaming members is disposed at an oblique angle to a center line of the rod body. The roofing screw according to claim 1, wherein the reinforcing rib extends outward from the direction of the rod.