JP2551224Y2 - Tap tool - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a tap holder, in which a screw for threading is formed before a shank.
A tap body having a square portion provided at the rear of the shank, and a metal holder into which a portion of the shank and the square portion of the tap body can be freely attached and detached in the axial direction and fitted with a free rotation in the rotational direction. In a tapping tool, when the tapping tool is turned reversely after cutting a screw, the tapping body is configured to prevent the tapping body from falling off from the metal holder due to weight or the like.

[0002]

2. Description of the Related Art As shown in FIG. 5, a tap body a formed by forming a screw c for threading ahead of a shank b and providing a square part e at a rear portion of the shank b, and one of a shank b of the tap body a. Tool and a metal holder f that fits the part and the square part e in the axial direction freely and detachably in the axial direction, and with the metal holder f in which the free rotation is restricted. It is well known that a protective member g is elastically and closely fitted to the protective member g. The above structure prevents the tap body a, which is long in the axial direction, from being deformed during the tapping rotation of the reversible rotating shaft in the positive direction. However, this tool must be reversely rotated by the reversible rotating shaft after tapping, and the tap body a must be removed from the screw that has just been tapped, but due to the rotational resistance of the screw, the tap body a is rotated in the reverse direction of the reversible rotating shaft. After the screw is removed from the screw, the tap body a
May fall off from the metal holder f and the protection member g, and therefore, it is necessary to pay attention to the reverse rotation.

[0003]

In the present invention, before the tap main body is fitted into the metal holder, the tap main body is screwed into the protective member, and then the tap main body is mounted on the inner surface of the metal holder, and the protective member is simultaneously mounted on the outer surface of the metal holder. While being able to assemble,
It is an object of the present invention to solve the problem of providing a structure in which the tap tool does not fall off the protection member and the metal holder without paying attention to the tap body at the time of reverse rotation.

[0004]

According to the present invention, there is provided a tap body 1 having a screw 4 for threading formed before a shank 2 and a square portion 5 provided at a rear portion of the shank 2. A rear part of a tapping tool comprising a metal holder 6 into which a part of the shank 2 and the square part 5 of the tap body 1 can be freely attached and detached in the axial direction and the free rotation is restricted in the rotating direction. On the inner surface of the distal end of the protective member 9 fitted and locked to the metal holder 6, a female screw 10 having several pitches to be screwed with the screw 4a having several pitches at the base for forming the screw 4 of the tap body 1 is provided. A feature of the tap tool is that the screw 4a at the base of the first screw is screwed into the female screw 10 of the protection member 9, and then the protection portion and the tap body 1 are fitted inside and outside the metal holder.

[0005]

In the tapping tool according to the present invention, the screws 4a of several pitches at the base of the thread of the tap body 1 are screwed to the female screws 10 of several pitches provided on the inner periphery of the tip of the protection member 9.
At the time of reverse rotation, the tap body 1 does not fall off the protective member 9 and the metal holder 6 even if the tap body 1 is not paid attention. That is, even when the tap body 1 tends to be delayed from the reverse rotation of the reversible rotating shaft due to the rotational resistance of the screw when the tapping is removed from the screw which has just been tapped, the screw 4a having several pitches
The tap body 1 has to rotate several times from the screwing of the female screw 10 and the female screw 10 to release the screwing. The tap body 1 does not fall off as in the past due to the repetition of absorbing and canceling the rotation delay.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings show an embodiment of the present invention.
FIG. 1 is a longitudinal sectional side view of the first embodiment, FIG.
FIG. 3 is a perspective view of the protective member, and FIG. 4 is a vertical sectional side view of the second embodiment.

In the first embodiment shown in FIGS. 1 to 3, reference numeral 1 denotes a tap body, which has a diameter larger than that of a shank 2 and has axial grooves 3 at equal angular intervals formed over a part of the shank 2. Then, a screw 4 for threading is provided between the concave grooves 3, and a square portion 5 is formed at a rear portion of the shank 2. Reference numeral 6 denotes a metal holder. A shank insertion hole 7 and a square hole 8 for fitting the rear part of the shank 2 of the tap body 1 and the square part 5 so as to be freely attached and detached in the axial direction and to restrict free rotation in the rotation direction. Are provided. The outer periphery of the square hole 8 is formed in a hexagonal shape so that it can be easily gripped by the chuck of the reversible rotating shaft.

[0008] 9 is formed of a slightly hard synthetic resin, rubber or the like, and is formed so as to elastically adhere to the outer periphery of the metal holder 6 and to fit into a part of the shank which does not enter the metal holder 6 of the tap body 1. And a 2-4 pitch screw 4a at the base of the screw 4 on the inner periphery of the tip.
Is provided with a female screw 10 of several pitches to be screwed. Female screw 10
May be provided with a heli-sert 11 for reinforcing hard synthetic resin or the like.

In order to assemble the tap body 1, the metal holder 6 and the protection member 9, the screw 4a of the tap body 1 is screwed into the female screw 10 of the protection member 9 to determine the relative position, and then the shank 2 And square part 5 with metal holder 6
At the same time, the protective member 9 is fitted around the outer periphery of the metal holder 6 by generating elastic friction.

The second embodiment shown in FIG.
An example in which a tap body having a diameter equal to or smaller than 6 mm and equal to or less than 6 mm is targeted for 1 will be described. This tapping tool is functionally and structurally the same as in the first embodiment. In addition, there is a tap body 1 in which the outer diameter of the screw 4 is smaller than the outer diameter of the shank 2, but in this case, the assembly process is different, but the structure is the same.

[0011]

According to the present invention, a tap body 1 in which a screw 4 for threading is formed before a shank 2 and a square portion 5 is provided at a rear portion of the shank 2, and a shank 2 of the tap body 1 are provided.
And a metal holder 6 to which one part of the square part 5 and the square part 5 can be freely attached and detached in the axial direction and free rotation is restricted in the rotation direction. On the inner surface of the distal end of the protective member 9 to be stopped, a female screw 10 having several pitches to be screwed with the screw 4a having several pitches at the base of the screw 4 of the tap body 1 is provided, and the screw 4a at the base of the screw of the tap body 1 is provided. Is screwed into the female screw 10 of the protection member 9, so that the structure causes
There is an effect that the dropping of the tap body 1 can be completely prevented.

[Brief description of the drawings]

 The attached drawings show one embodiment of the present invention,

FIG. 1 is a longitudinal sectional side view of a first embodiment.

FIG. 2 is an enlarged view of the same part.

FIG. 3 is a perspective view of the protection member.

FIG. 4 is a longitudinal sectional side view of a second embodiment.

FIG. 5 is a longitudinal sectional side view showing a conventional tapping tool.

[Explanation of symbols]

1 tap body, 2 shank, 3 groove, 4
Screw, 4a screw, 5 square part, 6 metal holder, 7 shank insertion hole, 8 square hole, 9 protection member, 10 female screw, 11 helisert

Claims (1)

(57) [Scope of request for utility model registration] 1. A screw 4 for threading prior to a shank 2.
And a tap body 1 provided with a square portion 5 at the rear portion of the shank 2, and a part of the shank 2 and the square portion 5 of the tap body 1 can be freely attached and detached in the axial direction and freely rotated in the rotational direction. A tapping tool comprising a metal holder 6 for restraining and fitting a screw 4 of the tap body 1 to an inner surface of a distal end of a protection member 9 adapted to fit and lock a rear part of the metal holder 6. A tapping tool comprising: a female thread 10 having several pitches to be screwed with the screw 4a having several pitches; and a screw 4a at a base of the screw of the tap body 1 being screwed to the female screw 10 of the protective member 9.