JP2001018119A - Drill tap and electric drill tapper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drill tap capable of easily and accurately boring with a drill and carving tap with one member, and to provide an electric drill tapper for standing a desirable tap while using this drill tap. SOLUTION: A drill blade 2 and a tap blade 3 are continuously formed in one bar-like material, and a fastening part 5 is formed into a rectangular body, and a reamer 4 is formed between the drill blade 2 and the tap blade 3 so as to form a drill tap 1. An electric drill tapper is provided with a variable means for changing the number of rotation and direction of rotation so that the drill tap is rotated at a high speed at the time of boring with a drill and that the drill tap is rotated at a low speed at the time of carving the tap in the hole opened by the drill and that the drill tap is rotated at a low speed in an opposite direction at the time of removing the drill tap, and the electric drill tapper is also provided with a means for prohibiting the transference of rotation to the high-speed rotation again without being rotated in the opposite direction when the rotation is transferred from the high-speed rotation to the low-speed rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drill tap capable of easily and accurately performing both drilling and tapping with a single member, and an electric drill for setting a desired tap using the drill tap. It is about tappers.

[0002]

2. Description of the Related Art Conventionally, when a tap is made on an angle, a channel, an iron plate, or the like, for example, when a 4 mm tap is made, a 3.2 mm φ pilot hole is first made with a drill, and then a 4 mm tap is made. To stand up, I had to prepare two drill blades and tap blades. At this time, if the pilot hole is mistakenly made with a 3.5 mm φ drill bit, for example, the tap becomes stupid and does not become a product.

[0003] Conventionally, when a tap is made as described above, the tap cannot be made unless two electric drills and an electric tapper are used alternately, resulting in a troublesome operation.

[0004] Furthermore, the tightening portion (root of the cutting edge) of a blade currently used in drills, taps, and other electric drills currently on the market is round, but the tightening side is 3 mm.
Because it is tightened with a square body (drill chuck), the drill etc. slips and turns around before the hole is opened, so it is very difficult to work, of course, drills, taps and drill chucks etc. There was a problem that it was damaged immediately and did not last long. In addition, there is a problem in that the part of the drill or the like on which the size is engraved is rubbed and becomes invisible, which hinders the operation.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems and the like, and an object of the present invention is to perform both drilling and tapping with a single member. An object of the present invention is to provide a drill tap that can be easily and accurately performed, and an electric drill tapper for setting a desired tap using the drill tap.

[0006]

In order to achieve the above object, the invention of claim 1 is a drill tap in which a drill blade and a tap blade are continuously formed on one rod-shaped material.
The invention according to claim 2 is a drill tap in which a reamer is formed between the drill blade and the tap blade. Also,
The invention according to claim 3 is a drill tap in which the tightening portion of the blade is formed in a square body.

Further, the invention according to claim 4 uses a drill tap in which a drill blade and a tap blade are continuously formed on a single rod-shaped material, and a high-speed rotation is used when drilling a drill hole. Low speed rotation when cutting a tap in the hole drilled in the above, variable speed and rotation direction variable means to reverse rotation when removing the drill tap, and reverse rotation when shifting from high speed to low speed rotation Means for prohibiting shifting to high-speed rotation again without passing through the electric drill tapper. Furthermore, the invention of claim 5 is an electric drill tapper provided with means for switching between a case where only low-speed rotation and reverse rotation are executed and a case where only high-speed rotation is executed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the structure of the drill tap according to the present invention. As shown in the figure, a drill tap 1 according to the present invention is formed by continuously forming a drill blade 2 and a tap blade 3 on one rod-shaped material. Further, a reamer 4 is formed between the drill blade 2 and the tap blade 3 so that slag such as metal generated when drilling holes is discharged to the outside. Further, the fastening portion 5 of the blade is formed in a rectangular body such as a triangular, hexagonal, octagonal, or decagonal shape.

When a 4 mm tap is to be made using such a drill tap 1, for example, a 3.2 mm drill is formed at the tip and then a 4 mm tap blade is used to cut the hole. Can be set up. Therefore, a desired tap can be made with a single drill tap. For example, for a 4 mm tap, the size of the tap blade and the size of the drill blade correspond to a 3.2 mm drill hole. Therefore, there is no inconvenience that a large pilot hole is made by mistake as in the conventional case.

[0010] Even if the tap is broken during the operation, at least the tip of the drill blade 2 is protruded from the processing member at that time, so that the drill can be easily removed while turning the broken blade.

An electric drill tapper used for setting a desired tap using the drill tap 1 will be described later in detail. When the electric drill tapper is used to make a hole, a high-speed rotation of, for example, about 3200 rpm is performed. Can be made with a hole.
A tap can be made at a low speed rotation of 20 rpm.

When the drill tap 1 is used, it is possible to easily and accurately perform both drilling and tapping with a single member. In addition, the above drill tap 1
Since the tightening portion 5 is formed not in a round shape but in a square shape, it can be firmly tightened by the drill chuck on the tightening side. The tap 1 and drill chuck are not damaged and last longer.

FIG. 2 is a schematic structural view of an electric drill tapper used for setting a desired tap using the drill tap 1. As shown in FIG. The electric drill tapper 10 includes a motor 11, gears 12 to 16, a spring 17, a clutch 1
8, a changeover switch 19, a drill chuck 20, and the like.

In this embodiment, the rotation ratio of the gears 12 and 13 is 1:10, and the rotation ratios of the gears 14, 15 and 16 are 1: 1. However, the present invention is not limited to this. . When the changeover switch 19 is used as an electric drill tapper, the changeover switch 19 is set to a free position (a state where the changeover switch 19 is not set to the position A or B shown in the drawing). When a power supply (not shown) is turned on, the motor 11 rotates and the gear 1
The gears 2 and 13 and the gears 14 and 16 rotate in conjunction with each other. The gear 14 has a configuration that can mesh with the gear 16 or the gear 15.

This state is set to low-speed rotation, and the drill tap 1
When the tip of the drill is pressed against the work member and pressure is applied to the tip of the drill, the gear 14 and the gear 16 are separated and the central clutch 18 is engaged at the same time. High-speed rotation is achieved, and a hole can be made in metal or the like with a drill at the tip of the drill tap 1.

When the hole is formed in the member, the pressure applied to the tip of the drill tap 1 is eliminated, so that the clutch 18 is disengaged by the force of the spring 17 and the original low-speed rotation is achieved. In this state of low-speed rotation, the tap can be cut at a location where the hole is opened by the tap blade 3.

When the desired tap has been cut in the place where the hole has been drilled, the electric drill tapper 10 is pulled forward, and the gear 14, the gear 16 and the gear 15 are pulled.
The drill tap 1 can be removed by reverse rotation at the same low speed rotation.

Further, the structure of the clutch portion will be further described. A stopper means 30 as shown in FIGS. 3 to 5 is provided at the center of the spring 17 or in the vicinity thereof. At the time of initial movement, the rotation speed was low, but as described above, when drilling was started, the rotation started at low speed and then started at high speed. When drilling was completed and the part of the drill blade 2 was removed from the workpiece, pressure was increased. It's gone, and it returns to low-speed rotation, and this time it taps. At this time, if pressure is applied to the electric drill tapper 10, the clutch 18 may be reengaged, causing a high-speed rotation when the tap is cut. In order to prevent such a problem, a stopper means 30 is provided.

Here, the stopper means 30 will be described in more detail. FIG. 3 is a sectional view taken along the longitudinal direction, and FIG. 4 is a sectional view taken along line AA of FIG. FIG.
As shown in FIG.
5 and an outer cylinder 36, and inside the inner cylinder 35, a locking piece 31 rotatably supported about a shaft screw 34 held in a direction perpendicular to the longitudinal direction. 36, a rectangular locking plate 32 capable of locking with the locking piece 31 is provided.
Are provided along the longitudinal direction. As shown in the drawing, the locking piece 31 has a shape in which a pair of opposing sides are substantially parallel to each other, and the other pair of opposing sides is substantially inwardly concave at the center.

In this configuration, when the clutch 18 is engaged and the drill is rotating at high speed, the locking piece 31 of the inner cylinder 35 is at the position shown in FIG. And the clutch 18
Is released and the rotation proceeds to low-speed rotation, the inner cylinder 35 and the outer cylinder 36 slide outward with respect to each other due to the force of the spring 17, so that the locking piece 31 hits against the locking plate 32 of the outer cylinder 36. It rotates about 45 degrees about the shaft screw 34, and a part of it is made to appear through the window 33 (see FIG. 5A).

At this time, if the force is excessively applied to the drill and the inner cylinder 35 and the outer cylinder 36 are mutually inward (the locking pieces 3
Even when the locking piece 31 slides in the direction in which the locking piece 31 separates from the locking piece 31, the portion recessed inside the upper end of the locking piece 31 hits the edge of the window 33 and does not slide any further (see FIG. 5B). There is no possibility that the gears 18 are engaged and shift to high-speed rotation.

When the electric drill tapper 10 is pulled backward and rotated in the reverse direction, the inner cylinder 35 and the outer cylinder 36 slide outward from each other.
When it hits again and turns just 90 degrees, the locking piece 3
The upper end of 1 comes into contact with the edge of the window 33 and stops (see FIG. 5C). After the reverse rotation, when pressure is applied to the drill by drilling a hole, the inner cylinder 35 and the outer cylinder 36 slide inward each other, and at this time, the upper end of the locking piece 31 hits the left edge of the window 33 and rotates. It retracts from the window 33 and returns to the position of FIG. In this case, the clutch 18 is engaged, and it is possible to shift to high-speed rotation.

As described above, the provision of the stopper means 30 allows the electric drill tapper 1 to have an excessive force when entering into a low-speed rotation from a high-speed rotation when drilling a hole.
Even if pressure is applied to zero, it is prevented from entering into high-speed rotation, and since high-speed rotation is never achieved, it is possible to safely perform tapping work. The structure is such that high-speed rotation is not achieved unless reverse rotation when removing the drill tap 1 is performed from low-speed rotation when the tap is cut.

Next, the changeover switch 19 will be described. The electric drill tapper 10 is used to make a desired tap using the drill tap 1 as described above, but can be used alone as an electric drill or an electric tapper by the changeover switch 19.

That is, when the changeover switch 19 is turned on to the position A shown in FIG. 2, the clutch 18 cannot be engaged even if pressure is applied to the drill, and only the low-speed rotation and the reverse rotation can be performed. Can be used as Further, the changeover switch 19 is moved to the position B shown in the figure.
When it is inserted, only high-speed rotation is possible and it can be used as an electric drill. And the changeover switch 1
When 9 is in a free position (a state where it is not put in the position of A or B), it can be used as the above-mentioned electric drill tapper. The electric drill tapper of the present invention can be mounted on a drilling machine or the like as a gear box and use a drill tap.

[0026]

As described in detail above, according to the drill tap of the present invention, a desired tap can be accurately and easily set with one drill tap. Since the size of the tap blade and the size of the drill blade correspond to each other, such as a .2 mm drill hole, there is no inconvenience that a large pilot hole is erroneously made as in the prior art.

Further, according to the electric drill tapper of the present invention, one unit has a function of high-speed rotation, low-speed rotation and reverse rotation, and a desired tap can be easily and accurately set using the drill tap of the present invention. Can be. Further, since the stopper means never rotates at a high speed when the tap is cut at a low speed, the work can be performed safely. Further, the changeover switch allows the electric drill tapper of the present invention to be used alone as an electric drill or an electric tapper, and thus can be used in three ways.

[Brief description of the drawings]

FIG. 1 is a front view showing a structure of a drill tap according to the present invention.

FIG. 2 is a schematic configuration diagram of an electric drill tapper of the present invention.

FIG. 3 is a sectional view showing a configuration of a stopper means.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a diagram for explaining the operation of the stopper means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drill tap 2 Drill blade 3 Tap blade 4 Reamer 5 Tightening part 10 Electric drill tapper 11 Motor 12 Gear 13 Gear 14 Gear 15 Gear 16 Gear 17 Spring 18 Clutch 19 Changeover switch 20 Drill chuck 30 Stopper means 31 Locking piece 32 Locking plate 33 Window 34 Shaft screw 35 Inner cylinder 36 Outer cylinder

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B23G 1/16 B23G 1/16 A

Claims (5)

[Claims] 1. A drill tap, wherein a drill blade and a tap blade are continuously formed on one rod-shaped material. 2. The drill tap according to claim 1, wherein a reamer is formed between the drill blade and the tap blade. 3. The drill tap according to claim 1, wherein the fastening portion of the blade is formed in a square body. 4. Use of a drill tap in which a drill blade and a tap blade are continuously formed on one bar-shaped material, and when drilling a hole, high-speed rotation is performed. Variable speed and rotation direction variable means to rotate at low speed when cutting, and to reverse at low speed when removing the drill tap, and to rotate at high speed again without reverse rotation when shifting from high speed to low speed An electric drill tapper comprising: means for inhibiting transition. 5. The electric drill tapper according to claim 4, further comprising means for switching between a case where only low-speed rotation and reverse rotation are executed and a case where only high-speed rotation is executed.