JPS609610A - Drilling and flush working tool by flat head screw - Google Patents

Abstract

PURPOSE:To permit flush work simultaneously with drilling work for a hole having a certain depth by protruding a drill from a hollow middle shaft and forming a lower top edge cutting edge part onto the underside of the middle shaft. CONSTITUTION:The drill inserted into a hollow middle shaft 1 is protruded into a lower top edge cutting edge part 3 and tightened and fixed by a hollow outer shaft 2. A gradient 5 is formed in the center lower part of the hollow middle shaft 1, and an expanding slot 6 is formed at the half divided part on the outer periphery, and set close to the groove on the drill 11 which is set at the top edge 4 of the cutting edge part close to the center of the lower top edge cutting edge part 3. Therefore, a gap is not formed between the outer periphery of the drill and the cutting edge part 3 of a drilling and flush working tool, and flush work is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metal processing tool that simultaneously performs countersunk processing by drilling a pilot hole when using a countersunk screw.

The material is drill steel or chair steel.

Conventionally, when using the countersunk screw shown in Figure 4, first drill a hole in the screw part to the set depth with a drill that matches the diameter shown in Figure 4 (4), then drill the hole in the countersunk part, then drill the hole to the set depth. 4. Replace with the drill shown in Fig. 6 that matches the diameter shown in Fig. 4 (B) (~ and machine to the set depth.

In that case, after machining the hole for the screw part shown in Figure 4,
Since the plate machining aperture (Figure 6) in B) had to be replaced each time, there were many machining steps and it was troublesome.

In addition, when using the drill shown in Fig. 5, the screw part (4) shown in Fig.
) is long, it is inappropriate because the aperture in Figure 5 and the tip (12) are short and have been set and fixed from the beginning.

The present invention was invented to eliminate those drawbacks.
To explain this with reference to the drawings, (1) hollow center shaft (1
) into the lower tip of the hollow center shaft (1).
) and tighten with the hollow outer shaft (2).

(2) A distribution (5) is provided at the lower center of the hollow center shaft (1), and a dividing groove (6) is provided at a place where the outer circumference is divided into two equal parts.

(3) Providing a lower tip blade part (3) of the hollow center shaft (1),
The aperture shown in Figure 6 (
11) Make the groove as desired.

In this case, if the groove of the drill is made as desired in Figure 6 (11), the outer periphery of the drill and the blade of the drilling and countersunk tool of the present invention (
3) There are no gaps between the two, making plate processing easy.

(4) The outer diameter 00) of the hollow outer shaft (2) is made smaller than the outer diameter (9) of the upper part of the blade portion (3) at the lower tip of the hollow inner shaft (1).

In this case, if the outer diameter 00) of the hollow outer shaft (2) is made small, deep hole machining can be facilitated.

Since the present invention has the above-described structure, when you wish to use it, insert a drill with a set diameter from the upper part of the hollow center shaft (1), and insert it near the center of the lower tip part (3). Blade (
4) Set the drilling depth as desired in the groove of the drill hole, tighten with the hollow outer shaft (2), and process by attaching it to a drill or drilling machine.

Therefore, the hole-drilling and countersunk processing tool of the present invention using a countersunk screw,
By drilling the specified holes, countersunking can be done at the same time.

Moreover, the tool for simultaneously drilling and countersunk processing using a countersunk screw of the present invention can be said to be a tool for use outside the rainy season, as it can be attached and detached, and the depth of drilling can be freely selected.

In addition, the hole drilling and countersunk processing tool of the present invention by countersinking is as follows:
It can also be used as a chamfering tool, or it can be used for socket screws by changing the angle of the blade (3).

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the present invention Fig. 2 is a partially cutaway side view of the present invention Fig. 6 is a front view of a conventional drill set Fig. 4 is a front view of a countersunk screw Fig. 5 is a front view of a conventional drill for countersunk screws. Fig. 6 is a perspective view showing an embodiment of the present invention in which the drill is replaced with a drill. (1) is a hollow inner shaft. (2) is a hollow outer shaft. (3) is a blade. Part (4) is the tip of the blade center approach (5) is the distribution part (6) is 2
The equally divided groove (7) is the hollow outer shaft screw (8), the hollow middle shaft screw (9) is the outer diameter of the upper part of the blade (3) (00), the outer diameter of the hollow outer shaft (00) is 11) is the set drill groove (12), which is the tip of the drill for a countersunk screw.■ is the threaded portion of the countersunk screw. (B) is the countersunk portion of the countersunk screw.Patent applicant: Yoshi Ando
road

Claims (1)

[Claims] (+) The aperture (Fig. 3) set in the hollow center shaft (1) is inserted into the hollow center shaft (1), and protrudes from the lower tip blade portion (3) of the hollow center shaft (1), and the hollow outer shaft ( Fix the tightening with 2). (2) A distribution (5) is provided at the lower center of the hollow center shaft (1), and a dividing groove (6) is provided at a place where the outer circumference is divided into two equal parts. (3) Provide a blade (3) at the lower tip of the hollow center shaft (1), and align the tip (4) of the blade near the center to the groove shown in Figure 6 and OD of the set drill. . (4) The outer diameter 00) of the hollow outer shaft (2) is made smaller than the outer diameter (9) of the upper part of the blade portion (3) at the lower tip of the hollow inner shaft (1). A simultaneous drilling type machining tool using a countersunk screw configured as described above.