JP3156633U - Waste grooved screw - Google Patents

Abstract

Disclosed is a screw with a waste groove, in which cutting waste is smoothly discharged and has a good tightening effect. A drill screw (4) is provided with one head (41), a screw rod (42) connected to one head (41), and one or more screw portions (43) on the screw rod (42). At the other end, a screw tip 44 and a waste groove 442 extending from the screw tip 44 to the screw 43 are provided, a conical surface 441 is formed at the end of the screw tip 44, Two symmetrical spiral waste grooves 442 are formed, and a tip cutting blade 443 is formed at the edge of the connection between the two waste grooves 442 and the conical surface 441, and the waste groove 442 extends to the screw portion 43. A screw tapping blade edge 431 is formed by the extended contact. [Selection] Figure 5

Description

The present invention relates to a screw with a waste groove, and more particularly to a drill screw and a tapping screw for fastening an object.

When tightening objects such as steel sheets and steel sheets, if you use a drill screw or tapping screw as a tool, you can tighten without drilling holes separately. For example, for assembling DIY houses, steel sheets and roofs, It is often used for tightening tools such as wood furniture, iron shelves, fences and aluminum gates.
FIG. 1 discloses the structure of a conventional drill screw. According to the drawing, the drill screw 1 is provided with one head 11; a screw rod 12 connected to one head 11, a screw portion 13 on the screw rod 12, A conical surface 141 is formed at the screw tip 14 and the end of the screw tip 14, and two symmetrical slanted waste grooves 142 are provided on the periphery of the conical surface 141. The two waste grooves 142, the conical surface 141, and the screw A tip cutting blade 143 and a cutting blade 144 are formed on the connection edge of the tip portion 14. During the tightening operation, the threaded portion 13 of the drill screw 1 is guided and gradually tightened with the cutting drills of the leading edge cutting blade 143 and the cutting edge 144, and at the same time, the generated cutting waste moves along the screw tip portion 14. Then, it moves above the waste groove 142 and is discharged and tightened.
The conventional drill screw structure is shown in FIGS. 2 and 3 in accordance with the Chinese utility model “96215648” “Drill screw structure improvement” and the Chinese utility model “96119066” “Drill screw molding method and product”. Is disclosed. According to the drawing, the drill screw 2 has one head 21; a screw rod 22 connected to one head 21, a two-stage screw portion 23 on the screw rod 22, and the other end of the screw rod 12. Includes a screw tip 24 and a conical surface 241 formed at the end of the screw tip 24, two symmetrical oblique waste grooves 242 are provided on the periphery of the conical surface 241, and the conical surface 241 and the two waste grooves. A lip 243 having a square cross section is provided on each side adjacent to 242, and a tip cutting blade 244 and a cutting blade 245 are formed at the edge of the connection between the two waste grooves 242, the conical surface 241 and the lip 243 Is done.
When the conventional drill screw 2 is tightened, the cutting drill of the tip cutting blade 244 and the cutting blade 245 of the screw tip portion 24 guides the screw portion 23 of the drill screw 2 and tightens it gradually. At the same time, The generated cutting waste moves along the screw front end portion 24 and above the waste cutting groove 242, and the blade lips 243 create a waste waste space at the periphery of the front end portion 24, and are tightened while discharging the cutting waste. .
However, if the outer diameter of the blade 243 is larger than the outer diameter of the tip portion 24, the drill hole is somewhat enlarged due to an expanding action such as hand tremor, and the engagement with the screw portion 23 is loosened and unstable. There is a risk of tightening.
FIG. 4 discloses a conventional tapping screw structure. According to the drawing, the tapping screw 3 is mainly composed of one head 31; one screw rod 32, a screw rod 32 connected to the head 31; a waste groove 33; The tapping screw is used as a cutting drill and the generated cutting waste is discharged from the waste groove 33.

The conventional waste grooved screw has the following disadvantages.
1. The screw tip of a conventional drill screw is provided with two symmetrical waste grooves, but the cutting blade position is at the peripheral edge of the cutting groove and the screw tip, and the end of the cutting groove is immediately before the thread. Since there is not much waste space in the threaded portion, the cutting waste may be blocked at the end of the cutting groove, and overheating is generated there, so that the drill screw is broken and the tightening effect is easily lost.
2. The tip of the conventional tapping screw has a 90 ° angle waste groove, but if the length of the waste groove is insufficient to accommodate the amount of cutting waste, the cutting waste is blocked at the end of the cutting groove. Since there is not enough waste space, cutting waste cannot be discharged smoothly, and the cutting waste becomes clogged, so that the tightening effect is easily lost.
An object of the present invention is to provide a screw with a waste groove that improves the above-described defects, in particular, smoothly discharges cutting waste and has a good tightening effect.

  Therefore, the present inventor completed the present invention as a result of intensive studies in view of the drawbacks found in the prior art. The screw with a waste groove of the present invention has one head; a screw rod connected to one head, one or more screw portions provided on the screw rod, and one or more spirals. A screw with a waste groove formed by forming a tapping pin edge on the thread portion.

According to the screw with a waste groove of this device, the following effects are obtained:
1. By improving the chip discharge, the screw is not overheated and the tightening effect is improved.
2. Since there is no enlargement of the drill hole, it becomes more stable to mesh with the threaded portion.
3. Improved chip discharge improves the tapping surface quality and improves stability.

FIGS. 5 and 6 disclose a front perspective view and a sectional view of a tip portion showing a drill screw structure according to a first embodiment of the present invention. Referring to the drawings, a drill screw 4 according to a first embodiment of the present invention includes a head 41; a screw rod 42 connected to the head 41; one or more screw portions on the screw rod 42; 43, and at the other end of the screw rod 42, a screw tip portion 44 and a waste groove 442 extending from the screw tip portion 44 to the screw portion 43 are provided. Formed and has two symmetrical spiral waste grooves 442 around the periphery of the screw tip 44, and a tip cutting blade 443 is formed at the edge of the connection between the two waste grooves 442 and the conical surface 441. The waste groove 442 is extended to the screw portion 43 to become a screw tapping blade edge 431, and according to the sectional view of the tip portion shown in FIG. 6, the outer diameter of the screw tip portion 44 is cylindrical and is formed on a conductive shaft. In addition, the hole expansion phenomenon hardly occurs. As shown in FIG. 7, the waste groove 442 may be extended to the screw portion 43. As shown in FIG. 8, the waste groove 442 may be extended to the head 11 by interruption. In some cases, different angles may be installed.
As shown in FIGS. 9 and 10, the operation of the drill screw of the present invention is disclosed. The screw tip 44 of the drill screw 4 matches the operation target, and the head 41 of the drill screw 4 is rotated with a tool so that the drill screw 4 is drilled downwardly. The cutting tap is effectively cut through the screw tapping blade edge 431, and the cutting waste is discharged from the waste groove 442.

FIG. 11 is a front perspective view showing a tapping screw structure according to a second embodiment of the present invention. Referring to the drawing, the structure of the tapping screw 5 according to the second embodiment of the present invention is that one head 51; a screw rod 52 connected to one head 51, and a screw portion 53 on the screw rod 52 are provided. The other end of the screw rod 52 is a sharp or flat screw tip. The tapping screw 5 has one or one or more spiral waste grooves 54, and a tapping blade edge 531 is formed on the screw portion 53. As shown in FIG. Can be adjusted from the tip to the bottom of the head 51 in some cases, and the angle of the waste groove 54 may be set differently depending on the case.
The operation of the tapping screw of the present invention is disclosed as shown in FIGS. The screw tip of the tapping screw 5 matches the operation target, and when the head 51 of the tapping screw 5 is rotated with a tool and drilled downward with the screw tip, the tapping screw 5 is tapped on the screw portion 53. Cutting is effectively performed through the cutting edge 531, and the cutting waste is discharged from the waste groove 54.

It is the front perspective view which showed the conventional drill screw. It is the front perspective view which showed the conventional drill screw. It is sectional drawing which showed the front-end | tip part of the conventional drill screw. It is the front perspective view and sectional drawing which showed the conventional tapping screw. It is the front perspective view which showed the drill screw by 1st Example of this invention. It is sectional drawing of the front-end | tip part which showed the drill screw by 1st Example of this invention. It is explanatory drawing of the drill screw by 1st Example of this invention. It is explanatory drawing of the drill screw by 1st Example of this invention. It is operation | movement explanatory drawing of the drill screw by 1st Example of this invention. It is operation | movement explanatory drawing of the drill screw by 1st Example of this invention. It is explanatory drawing of the tapping screw by 2nd Example of this invention. It is explanatory drawing of the tapping screw by 2nd Example of this invention. It is operation | movement explanatory drawing of the tapping screw by 2nd Example of this invention. It is operation | movement explanatory drawing of the tapping screw by 2nd Example of this invention.

DESCRIPTION OF SYMBOLS 1 Drill screw 11 Head 12 Screw rod 13 Screw part 14 Screw tip part 141 Conical surface 142 Waste groove 143 Tip cutting blade 144 Cutting blade 145 Waste groove end point 2 Drill screw 21 Head 22 Shaft part 23 Screw part 24 Screw tip Portion 241 Conical surface 242 Waste groove 243 Cutting edge 244 Tip cutting blade 245 Cutting blade 246 Waste groove end point 3 Tapping screw 31 Head 32 Screw rod 321 Screw portion 33 Waste groove 331 Angle 4 Drill screw 41 Head 42 Screw rod 43 Screw part 431 Screw tapping cutting edge 44 Screw tip 441 Conical surface 442 Waste groove 443 Tip cutting blade 5 Tapping screw 51 Head 52 Screw rod 53 Screw part 531 Tapping blade edge 54 Waste groove

Claims (12)

A drill screw with a waste groove, characterized by one head; a screw load connected to one head; a screw portion provided on the screw load, and a spiral waste on the screw load A drill screw with a waste groove, characterized in that a groove is provided, and the waste groove extends from a tip portion to a screw portion to become a tapping pin tip. The drill screw with a waste groove according to claim 1, wherein there are a plurality of waste grooves on the screw load. 3. The drill screw with a waste groove according to claim 2, wherein at least one of the plurality of waste grooves extends only to an adjacent boundary of a screw tip portion. The drill screw with a waste groove according to claim 2, wherein the plurality of waste grooves extend to a screw portion on a screw load. The drill screw with a waste groove according to claim 2, wherein the waste groove is extended to a head portion or extended by interruption. The drill screw with a waste groove according to claim 2, wherein the waste groove is installed at a different angle depending on circumstances. The drill screw with a waste groove according to claim 1, wherein a plurality of screw portions on the screw load are provided. A tapping screw with a waste groove, characterized by one head; a screw load connected to one head; a screw portion provided on the screw load, and a spiral waste on the screw portion A tapping screw with a waste groove, characterized by comprising a groove. The tapping screw with a waste groove according to claim 8, wherein the waste groove of the tapping screw extends to the head. The tapping screw with a waste groove according to claim 8, wherein the waste groove has a different angle depending on circumstances. The tapping screw with a waste groove according to claim 8, wherein the waste groove is plural. 12. The tapping screw with a waste groove according to claim 11, wherein the lengths of the plurality of waste grooves may not be the same.

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