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Combination of screw with screwdriver bit and header punch for manufacturing screw

A screwdriver head and screw technology, applied in screwdrivers, manufacturing tools, screws, etc., can solve the problems of reduced screw tightening operation efficiency, inability to transfer screws, and increased damage to screw grooves.

Inactive Publication Date: 2007-07-18
户津胜行
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no problem when the mounting object of the screw is a rigid body such as metal, but when it is a precision part, etc., there is a disadvantage of damaging these objects
[0010] In addition, the occurrence of the protrusion deviation phenomenon will accelerate the wear of the front end of the cutter head, that is, the blade portion 22 and the extended blade portion 22a, because these wears will further increase the generation of the protrusion deviation phenomenon, and as a result, the screw groove will be damaged. additional questions
[0011] And, by applying excessive thrust to the screwdriver bit 20, although the phenomenon of deviation of the protrusion can be prevented, on the other hand, accurate torque cannot be transmitted to the screw, and the operator applies it to the screwdriver bit 20. As a result, there is a problem that the tightening torque of the screw is deviated.
[0012] On the other hand, when the screw is tightened manually, the operation of fully pressing the screwdriver bit 20 onto the screw and rotating it brings excessive labor and fatigue to the operator.
[0013] In addition, with the combination of the conventional screw 10 and the screwdriver bit 20, when the screw is installed using a hand tool or an electric tool, it is difficult to maintain the screw shaft when the tip end of the bit is fitted in the screw groove. The screw rotation operation is carried out in the state of coaxial cooperation with the screwdriver shaft
Therefore, when the screw shaft and the screwdriver shaft are inclined, not only the protrusion deviation phenomenon frequently occurs, but also the damage of the screw groove frequently occurs, so that the work efficiency of the screw tightening work is reduced, and, along with the damaged screw, waste of money in consumption
[0014] In addition, when the screw is removed, the same protrusion deviation phenomenon and screw groove damage as described above are likely to occur, but in this case, it is impossible to remove the screw, and a part of the screw installation object must be damaged.
In particular, when the screw groove is clogged with garbage, etc., the above-mentioned problems are more serious, for example, the problem of complicating the separation operation for waste recycling accompanying screw disassembly

Method used

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  • Combination of screw with screwdriver bit and header punch for manufacturing screw
  • Combination of screw with screwdriver bit and header punch for manufacturing screw
  • Combination of screw with screwdriver bit and header punch for manufacturing screw

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0043] 1 and 2 show an embodiment of the screw of the present invention. That is, in FIG. 1 and FIG. 2, reference numeral 30 represents a screw of the present invention, and the head portion 30a of the screw 30 is formed into a plate shape in section, and a bit fitting groove 32 is provided at the top center thereof. Furthermore, the center portion of the screw head portion 30a of the bit fitting groove 32 constitutes a plus sign (+)-shaped orthogonal cross groove.

[0044] The bit fitting groove 32 is formed in accordance with the opening dimension (m) and the groove bottom dimension (g) in the conventionally known JIS (Japanese Industrial Standards) (see FIG. 2 ). That is, the structure is such that an inclined groove having an inclined angle β of about 20 to 30° (for example, 26°30′) with respect to the screw shaft is formed from the opening end edge of the bit fitting groove 32 to a required depth. Part 32a; from the lower edge of the inclined groove part 32a to the cente...

Embodiment 2

[0048] (Screw structure example 2)

[0049] Fig. 3 shows another embodiment of the screw of the present invention. That is, in FIG. 3, the cross section of the screw head 30a of the screw 30 of this embodiment is formed in a pot shape. In addition, the structure of the cutter head fitting groove 32 provided on the screw head 30a of the screw 30 of this embodiment is the same as the cutter provided in the screw head 30a (disc-shaped cross-section) of the embodiment shown in FIGS. 1 and 2 . The head fitting groove 32 is the same. Therefore, the same symbols are used for the same structural parts, and their detailed descriptions are omitted.

Embodiment 3

[0051] (Screw structure example 3)

[0052] Fig. 4 shows another embodiment of the screw of the present invention. The screw of this embodiment is a small and lightweight precision machine screw, and its screw head 30 a is formed in a thin flat shape, for example. In addition, the structure of the bit fitting groove 32 provided on the screw head 30a of the screw 30 of this embodiment is also the same as that of the screw head 30a (disc-shaped cross-section) of the embodiment shown in the aforementioned FIGS. 1 and 2 . The bit fitting grooves 32 provided are the same. Therefore, the same symbols are used for the same structural parts, and detailed description thereof is omitted.

[0053] The preferred embodiments of the screw of the present invention have been described above. However, the bit fitting groove 32a of the screw of the present invention is based on the opening size (m) and the groove bottom size of the conventionally known JIS (Japanese Industrial Standards). In...

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Abstract

A combination of a screw with a screwdriver bit capable of effectively preventing the cam-out event of the screwdriver bit by improving the formation of a groove part in the cross groove of the screw so as to prevent the screw from being damaged and capable of remarkably increasing a working efficiency by always achieving an appropriate and rapid screw tightening operation even if the cross groove portion of the screw is damaged, and a header punch for manufacturing the screw, the header punch comprising the screw having cutout step parts of generally right triangle shape in cross section provided at the center parts of the tilted groove parts of a bit fitted groove formed in a cross groove at a screw head part and a screwdriver bit having projected parts of generally triangle in cross section matching the cutout step parts formed at the center part of the tilted groove parts of the screw provided at the center part of the tilted end edge parts of a flat-shaped blade part and having the tip faces of the blade part formed as conical projected parts.

Description

technical field [0001] The present invention relates to a screw, a screwdriver bit suitable for the screw, and a head stamping machine for screw manufacturing, in particular to a cross-recessed bit fitting groove formed on the head of the screw and a tight fit of a screwdriver bit matched therewith. Combination of screw and screwdriver bit, and head punching machine for screw manufacturing, which can quickly and accurately realize screw installation and unscrewing through appropriate torque transmission. Background technique [0002] The combination of a general screw and a screwdriver bit in the prior art has structures as shown in FIGS. 9 to 12 . That is, FIGS. 9 and 10 show a conventional screw having a cross recess, and FIG. 11 shows a driver bit used for the cross recess screw, and FIG. 12 shows the fitting state of the screw and the screw driver. [0003] However, in the conventional screw 10 shown in FIG. 9, the cross groove 12 is provided in the screw head 10a. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25B15/00F16B23/00B21K1/48B21K1/46
CPCB21K1/463F16B23/0023B25B15/005
Inventor 户津胜行
Owner 户津胜行