JPH0678611U - Machine screw with cross hole - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a machine screw with a cross hole that can be turned even if the cross groove of the machine screw with a cross hole is crushed. [Structure] A small hole with an appropriate depth is placed in the center of the bottom of the cross groove.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is used in the technical field of screws, and particularly relates to a machine screw with a cross hole.

[0002]

[Prior art]

 Machine screws with cross holes are known. However, in the conventional machine screw with a cross hole, when the Phillips screwdriver is fitted into the cross hole and the machine screw is turned, the driver often slips and the side surface of the cross hole collapses. If this happens, this machine screw with a cross hole will no longer be able to be turned with a Phillips screwdriver. This is where we often experience.

[0003]

[Problems to be solved by the device]

 This invention intends to provide a machine screw with a cross hole which solves the above problems.

[0004]

[Means for Solving the Problems]

 Hereinafter, the cross-threaded machine screw 1 of the present invention will be described with reference to FIG. A cross-shaped groove 3 hangs on the head 2. In the center 4 of the bottom of the groove 3, a small hole 5 of a further appropriate depth is formed. A hexagonal, quadrangular or circular cross section is effective for the small hole 5.

This cross-threaded machine screw 1 has a hexagonal bar wrench which can be fitted into the small hole 5 when the groove 3 is collapsed, or when the small hole 5 has a hexagonal cross section, and can be rotated by inserting it into the small hole 5. , The cross-head machine screw 1 can be turned. When the child hole 5 is square, it fits into this. You can turn it by inserting a plus or minus screwdriver. When the small hole 5 is circular, if you hit it with a hammer and hit it with a hammer, the driver will bite into the edge of the entrance of the circular small hole 5 and a new cross hole will be caught and caught, Screw 1 can be turned.

[0006]

【Example】

 In this embodiment, the machine screw having a 10U hole is a pan machine screw, but it may be a machine screw having a head 2 with another shape. The depth of the small hole 5 is preferably at least equal to or larger than the cross-section of the cross section I. Further, the cross section of the small hole 5 is preferably hexagonal, quadrangular or circular from the viewpoint of processing, but may be other shapes.

[0007]

[Effect of device]

 As described above, the machine screw with a cross hole of the present invention has a unique effect that the screw can be rotated even when the cross hole is crushed.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment.

FIG. 2 is a view on arrow A in FIG.

[Explanation of symbols]

 1 Cross-recessed small screw 2 Head 3 Cross-shaped groove 4 Bottom center 5 Small hole

Claims (4)

[Scope of utility model registration request] 1. A machined screw with a cross hole, characterized in that a small hole with a proper depth is further formed in the center of the bottom of a cross-shaped groove, which is carved on the head of the machined screw with a cross hole. 2. The cross section of the eyelet is hexagonal.
Machine screw with cross hole. 3. The cross section of the eyelet is quadrangular.
Machine screw with cross hole. 4. The cross recessed machine screw according to claim 1, wherein the cross section of the small hole is circular.