Steel plate screw with notches

Abstract

A steel plate screw with a notch comprises a screw rod head, a screw rod arranged below the screw rod head, a leading-in part arranged below the screw rod, a self-tapping tooth arranged on the screw rod, and a plurality of cambered surface grooves which are formed by cutting the screw rod and the leading-in part and are formed below the self-tapping tooth from top to bottom. And the self-tapping teeth are arranged at equal intervals from one end, far away from the lead-in part, of the screw rod. And the plurality of cambered surface grooves are arranged around the central axis of the screw rod. And in the arrangement direction of the screw rod and the lead-in part, the two ends of the cambered surface groove are arranged to be oblique angles. In the direction from the screw rod to the lead-in part, the cambered surface groove is subjected to arc-shaped cutting in the direction of the central shaft of the screw rod, and the cambered surface is back to the central shaft of the screw rod. And the groove depth of the cambered surface groove is gradually increased from the screw rod to the lead-in part. The steel plate screw with the notches is provided with the cambered surface grooves, so that the tapping efficiency and the fastening performance after installation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a steel plate screw with a cutout. Background Art

[0002] Steel plate nails are steel wire products used to nail objects. They are widely used in various fields such as industry, agriculture, construction, and civil use. They are mainly used to fix objects with small axial separation force and small radial shear force. They have the characteristics of simple processing, easy use, and fast nailing.

[0003] On the China Science and Technology Network, there is a prefabricated steel plate nail with a publication number of CN220134395U. The prefabricated steel plate nail includes a nail body and a nail tip, wherein the nail tip is fixedly connected to one end of the nail body, a nail hole is provided on the nail body, the nail hole is communicated with the side wall of the nail body, a fixing nail is provided in the nail hole, and the diameter of the fixing nail is not greater than the inner diameter of the nail hole. By adopting the above technical solution, when the screw is used, the steel plate nail is first driven into the object to be nailed, and then the fixing nail is driven into the object through the nail hole, so that the steel plate nail is not easy to loosen in the object, and the setting of the fixing nail consolidates the connection between the steel plate nail and the object, thereby extending the service life of the prefabricated building component.

[0004] However, the assembly type steel plate nails have complicated operation procedures during installation, and cannot simultaneously ensure driving efficiency and installation tightness. Utility Model Content

[0005] In view of this, the utility model provides a steel plate screw with a cutout which can solve the above problem.

[0006] The plate screw with a cutout includes, from top to bottom, a screw rod, an introduction portion arranged below the screw rod, a self-tapping thread arranged on the screw rod, and a plurality of arcuate grooves arranged on the screw rod and the introduction portion. The self-tapping thread is arranged from the end of the screw rod away from the introduction portion to the top of the arcuate groove. The arcuate groove is arranged from the bottom of the self-tapping thread to the end of the introduction portion. A plurality of the arcuate grooves are arranged around the central axis of the screw rod. In the direction from the screw rod to the introduction portion, the arcuate groove is cut in an arc shape toward the central axis of the screw rod to form an arcuate surface, and the arcuate surface faces away from the central axis of the screw rod.

[0007] Furthermore, the steel plate screw with a cutout also includes a screw head disposed above the screw rod, and a nail portion is disposed on a side of the screw head away from the screw rod.

[0008] Furthermore, the central axes of the screw head, the screw rod and the introduction portion are arranged on the same straight line and are integrally manufactured.

[0009] Furthermore, the self-tapping thread is arranged on the circumferential outer side of the screw rod in a nearly horizontal rotation manner.

[0010] Furthermore, in the arrangement direction of the screw rod and the introduction portion, two ends of the arc surface groove are arranged at an oblique angle.

[0011] Furthermore, in the direction from the screw rod to the introduction portion, the groove depth of the arc surface groove gradually increases.

[0012] Furthermore, the plurality of arc surface grooves are centrally symmetrically arranged.

[0013] Furthermore, the area of ​​the arcuate groove on the introduction portion is smaller than the area of ​​the arcuate groove on the screw.

[0014] Compared with the prior art, the utility model provides a steel plate screw with a cutout, which increases the efficiency of penetrating the steel plate material by setting an arc groove, and is installed more tightly with the steel plate material. During installation, a matching screwdriver is selected for the steel plate screw with a cutout, because the depth of the nail portion is greater than that of the nail portion of an ordinary screw, so that the steel plate screw with a cutout and the screwdriver form an angle that is not easy to fall. The steel plate screw with a cutout is aligned with the steel plate material, and the nail portion is twisted so that the introduction portion penetrates the steel plate material. The oblique angles set at both ends of the arc groove reduce the friction with the steel plate material, and the directions in which the multiple arc grooves penetrate the steel plate material are different from the directions in which the introduction portion penetrates the steel plate material, which increases the penetration speed of the introduction portion. The multiple arc grooves are arranged symmetrically at the center, so that the force applied to the steel plate material during penetration is more uniform, and the penetration speed is more stable. When the steel plate material with a cutout is installed on the steel plate material, the screw rod and the screw head sink into the steel plate material. The inner arc surface of the arc groove applies extrusion force to the steel plate material, so that the multiple arc grooves are subjected to extrusion force from the opposite direction of the steel plate material, and the extrusion force increases with the increase of the groove depth and height of the arc groove. The self-tapping screw increases the contact area with the screw groove by increasing the number of circles, so that the steel plate screw with the cutout is tightly fixed in the steel plate material. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic structural diagram of a steel plate screw with a cutout.

[0016] Figure 2 for Figure 1 A schematic diagram of the structure of a screw head having. DETAILED DESCRIPTION

[0017] The following is a further detailed description of the specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0018] See also Figure 1 to Figure 2 , which is a schematic diagram of the structure of a steel plate screw with a cutout provided by the utility model. The steel plate screw with a cutout includes, from top to bottom, a screw head 10, a screw rod 20 disposed below the screw head 10, an introduction portion 30 disposed below the screw rod 20, a self-tapping thread 40 disposed on the screw rod 20, and a plurality of arc grooves 50 disposed on the screw rod 20 and the introduction portion 30. It is conceivable that the steel plate screw with a cutout also includes some other functional modules, such as a plating mold, etc., which are well known technologies to those skilled in the art and will not be described in detail here.

[0019] The screw head 10 is used to cooperate with the screwdriver and other tools to screw the screw rod 20. The shape of the screw head 10 is a countersunk head, so that the screw head 10 sinks into the material after the steel plate screw with the cutout is tightened, so that the steel plate screw with the cutout is not easy to be screwed out. The screw head 10 is provided with a nail portion 11 on the side away from the screw rod 20.

[0020] The nail portion 11 is in a cross groove shape, and the depth of the nail portion 11 is greater than half the height of the screw head 10. During the disassembly process, when screwdrivers with different angles are disassembling the steel plate screw with the cutout, the steel plate screw with the cutout mounted on the screwdriver is not easy to fall off because the depth of the nail portion 11 is greater than that of the nail portion of an ordinary screw, making the operation steps simpler. It is conceivable that the nail portion 11 can be set to other corresponding shapes according to the type of screwdriver actually used.

[0021] The screw rod 20 is used to receive the screw head 10 and the introduction part 30. The central axes of the screw head 10, the screw rod 20 and the introduction part 30 are arranged on the same straight line to reduce the error of the steel plate screw with the cutout in actual operation. The screw rod 20, the screw head 10 and the introduction part 30 are made in one piece, so that the steel plate screw with the cutout is more durable.

[0022] The introduction part 30 is arranged below the screw 20 and is used to punch into the unpunched steel plate material. The introduction part 30 is in a drill shape to reduce the punching angle between the introduction part 30 and the steel plate material and to increase the pressure of the introduction part 30 punching into the steel plate material to enhance the punching efficiency.

[0023] The self-tapping teeth 40 are arranged at equal intervals, from the end of the screw 20 away from the introduction part 30 to the top of the arc surface groove 50. The self-tapping teeth 40 are arranged on the circumferential outer side of the screw 20 for tapping the steel plate material. The helix angle of the self-tapping teeth 40 is set so that the self-tapping teeth 40 are arranged nearly horizontally on the circumferential outer side of the screw 20, but still retain a certain angle, so that the number of screw grooves of the self-tapping teeth 40 left on the surface of the steel plate material increases, and the contact area between the self-tapping teeth 40 and the screw groove increases, so that the steel plate screw with the cutout is tightly fixed in the steel plate material after installation.

[0024] The plurality of arc grooves 50 are cut and formed, and are arranged from the bottom of the self-tapping thread 40 to the end of the introduction part 30. The arc grooves 50 are used to tightly fix the steel plate material and the steel plate screw with the cutout. In the direction from the screw rod 20 to the introduction part 30, the arc grooves 50 are cut in an arc shape toward the central axis of the screw rod 20 to form an arc surface, and the arc surface faces away from the central axis of the screw rod 20. The inner arc surface of the arc groove 50 applies an extrusion force to the steel plate material, so that the plurality of arc grooves 50 are subjected to an extrusion force from the opposite direction of the steel plate material, so that the steel plate screw with the cutout is tightly installed with the steel plate material. From the screw rod 20 to the introduction part 30, the groove depth of the arc groove 50 gradually increases, so that the steel plate material at different penetration distances of the steel plate screw with the cutout applies different extrusion forces to the arc groove 50, so that the steel plate screw with the cutout is not easy to be screwed out of the steel plate material. The area of ​​the arc groove 50 on the introduction part 30 is smaller than the area of ​​the arc groove 50 on the screw 20, so as to avoid the drill tail shape of the introduction part 30 affecting the size of the plurality of arc grooves 50, thereby avoiding affecting the function of the arc groove 50. The arc groove 50 is used to increase the penetration efficiency. When the arc groove 50 penetrates the steel plate material, the direction in which it penetrates the steel plate material is different from the direction in which the introduction part 30 penetrates the steel plate material. The arc groove 50 applies force at multiple angles to increase the penetration efficiency of the steel plate screw with the cutout. In the direction in which the screw 20 and the introduction part 30 are arranged, the two ends of the arc groove 50 are arranged at an oblique angle to reduce the contact area between the arc groove 50 and the steel plate material, so that the friction resistance when penetrating the steel plate material is reduced, thereby promoting the penetration efficiency of the steel plate screw with the cutout to increase. The plurality of arc grooves 50 are arranged around the central axis of the screw 20 and are centrally symmetrical. When the plurality of arcuate grooves 50 penetrate into the steel plate, two opposite directions of the surface of the penetrated steel plate material are simultaneously subjected to the same magnitude of cutting force applied by the arcuate grooves 50, so that the introduction part 30 is more stable when the arcuate grooves 50 penetrate into the steel plate.

[0025] Compared with the prior art, the utility model provides a steel plate screw with a cutout, which increases the efficiency of penetrating the steel plate material by setting an arc groove 50, and is installed more tightly with the steel plate material. During installation, a matching screwdriver is selected for the steel plate screw with a cutout, because the depth of the nail portion 11 is greater than that of the nail portion of an ordinary screw, so that the steel plate screw with a cutout and the screwdriver form an angle that is not easy to fall. Align the steel plate screw with a cutout with the steel plate material, and twist the nail portion 11 so that the introduction portion 30 penetrates the steel plate material. The oblique angles set at both ends of the arc groove 50 reduce the friction with the steel plate material, and the directions in which the multiple arc grooves 50 penetrate the steel plate material are different from the directions in which the introduction portion 30 penetrates the steel plate material, which increases the penetration speed of the introduction portion 30. The central symmetric arrangement of the multiple arc grooves 50 makes the force applied to the steel plate material more uniform during penetration, and the penetration speed is more stable. When the steel plate material with the cutout is installed on the steel plate material, the screw rod 20 and the screw head 10 sink into the steel plate material. The inner arc surface of the arc groove 50 applies an extrusion force to the steel plate material, so that the multiple arc grooves 50 are subjected to an extrusion force from the opposite direction of the steel plate material, and the extrusion force increases with the increase of the groove depth height of the arc groove 50. The self-tapping thread 40 increases the contact area with the screw groove by increasing the number of turns, so that the steel plate screw with the cutout is tightly fixed in the steel plate material.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. A steel plate screw with a cutout, characterized in that: The steel plate screw with a cutout includes, from top to bottom, a screw rod, an introduction portion arranged below the screw rod, a self-tapping tooth arranged on the screw rod, and a plurality of arcuate grooves arranged on the screw rod and the introduction portion. The self-tapping tooth is arranged from the end of the screw rod away from the introduction portion to the top of the arcuate groove, and the arcuate groove is arranged from the bottom of the self-tapping tooth to the end of the introduction portion. A plurality of the arcuate grooves are arranged around the central axis of the screw rod. In the direction from the screw rod to the introduction portion, the arcuate groove is cut in an arc shape toward the central axis of the screw rod to form an arc surface, and the arc surface faces away from the central axis of the screw rod.

2. The steel plate screw with a cutout according to claim 1, characterized in that: The steel plate screw with the cutout further comprises a screw head arranged above the screw rod, and a nail portion is arranged on a side of the screw head away from the screw rod.

3. The steel plate screw with a cutout according to claim 2, characterized in that: The central axes of the screw head, the screw rod and the introduction part are arranged on the same straight line and are integrally formed.

4. The steel plate screw with a cutout according to claim 1, characterized in that: The self-tapping thread is arranged in a nearly horizontal rotation on the circumferential outer side of the screw rod.

5. The steel plate screw with a cutout according to claim 1, characterized in that: In the arrangement direction of the screw rod and the introduction portion, two ends of the arc surface groove are arranged at an oblique angle.

6. The steel plate screw with a cutout according to claim 1, characterized in that: In a direction from the screw rod to the introduction portion, the groove depth of the arc surface groove gradually increases.

7. The steel plate screw with a cutout according to claim 1, characterized in that: The plurality of arc surface grooves are centrally symmetrically arranged.

8. The steel plate screw with a cutout according to claim 1, characterized in that: The area of ​​the arcuate groove on the introduction portion is smaller than the area of ​​the arcuate groove on the screw rod.

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