JP2014050909A - Attachment for rotating tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold a drill screw and a tapping screw by a magnet, and also eliminate deposition of iron powder discharged by screwing upon completion of work.SOLUTION: A socket holder 100 is constituted of a cylindrical socket part 110 and a substantially hexagonal-prism-shaped shank part 150 maintained to transmit torque to the socket part 110 and in which the torque is transmitted from a rotating tool. The shank part 150 and the socket part 110 are slidably attached by a retaining mechanism constituted of a ring spring 130 and a steel ball 140. A thin cylindrical magnet 170 is attached to the tip side of the shank part 150. In the socket part 110, a resin plate 120 constituted of a nonmagnetic member is provided between a holding unit 112 and the magnet 170.

Description

  The present invention relates to an attachment (tool, jig) that is detachably attached to a rotating tool such as an electric tool or an air tool, and is used for tightening or loosening a screw by transmitting rotational torque. The present invention relates to an attachment suitable for a tapping screw or a drill screw used for joining an iron plate or the like.

  A self-drilling tapping screw, generally called a drill screw, has a cutting edge at the tip, and can be screwed without making a pilot hole in a thin iron plate or the like. In general, the rotational speed at which the cutting blade enters is designed to be around 2500 rotations. Therefore, when using an electric impact tool, it is necessary to adjust the rotational speed at which the cutting blade enters by pressing the tool. At this time, if the rotational speed is high, the cutting edge will burn and cause locking, and conversely, if the rotational speed is low, problems such as inability to screw in forever will occur.

  It is also important to press the electric impact tool straight. If it becomes slanted, screw fall may occur, or the cutting edge may slip and damage the member. Also, since drill screws are heat treated, the unit price is higher than that of general mechanical screws. Therefore, there is no attachment for rotating tools that can perform stable operations with little loss such as screwing errors or dropping off from rotating tools. It is desired.

  In order to satisfy these requirements, it is common to give a magnetic force to a bit for a rotary tool or a socket tool. As a result, the drill screw can be held and adjusted to the target tightening position with one hand, and the assist of pressing the rotary tool straight with the other hand can be performed. Accordingly, stable tightening can be performed, and it is possible to prevent the member from being damaged, expensive screws from being seized, and falling off.

A socket tool disclosed in U.S. Pat. No. 7,040,431 (Patent Document 1) holds a hexagonal head with a flange by a magnet built in the socket portion. Since the drill screw is held by the magnetic force of the magnet, the screw does not fall off during the operation and the screw does not fall down, so that a stable screw tightening operation can be performed.
However, there is a problem that the iron powder (cutting element) discharged when the pilot hole is drilled by the cutting edge of the drill screw is always attracted to the magnet. A pilot hole is formed in a thin iron plate or the like by the cutting blade at the tip of the drill screw. At this time, the iron powder is discharged to the outside along the screw portion. Further, since the discharged iron powder is in a fine chip shape, it is scattered around. When screw tightening is performed with the socket tool disclosed in Patent Document 1, iron powder is sucked and attached to the magnet at the moment when the screw tightening is completed and the socket tool is removed. Once iron powder adheres, it cannot be easily removed by the magnetic force of the magnet. In particular, in the case of a socket tool, since the magnet is located in a deep part of the socket part, once iron powder adheres, it is difficult to remove it.

Accumulation of chip-like iron powder not only makes the holding of the drill screw unstable, but also reduces the contact area with the hexagon head so that the hexagon head is crushed and the socket portion is easily worn. Furthermore, since the generated iron powder is formed in a curled shape with sharp edges due to the cutting edge of the drill screw, there is a possibility that the finger will be pierced and injured when removed.
The iron powder adhesion problem also occurs in the thin plate tapping screw work in which a screw hole is formed by opening a pilot hole smaller than the screw diameter in advance, so the iron powder adhesion to the magnet becomes a big problem in the tapping work. Yes.

  Further, some drill screws and tapping screws are tightened with a cross-shaped or square-shaped rotating tool bit such as a pan head or a truss head. Even in this case, a method of holding the screw by magnetizing the cutting edge of the rotating tool bit with a magnetizer or magnetizing the cutting edge by bringing the rotating tool bit into contact with a magnet is used. Similarly to the socket tool, the cross-shaped or quadrangular rotating tool bit has problems such as injury to the finger when removing the iron powder, and failure to remove the iron powder due to the reattachment of the iron powder.

  A socket tool disclosed in European Patent No. 2468452A2 (Patent Document 2) is characterized in that a holder for holding a magnet moves forward and protrudes from a socket portion. At the end of the work, the iron powder can be easily removed by moving the holder forward by lever operation and protruding the magnet part.

US7044031B1 publication EP2466842A2 publication

However, even in the socket tool disclosed in Patent Document 2, iron powder formed in a curled shape with a sharp edge is attached to the magnet portion, so care must be taken to remove it. It is impossible to completely prevent iron powder due to re-adhesion during cleaning.
In view of such a problem, the present invention is an attachment for a rotary tool, which can hold a drill screw or a tapping screw with a magnet, but does not adhere to iron powder discharged by screwing at the end of work. (Socket holder (nut setter), bit holder).

In order to achieve the above-described object, the present invention takes the following technical means.
That is, the rotary tool attachment according to the present invention is an attachment for rotating the fastening member by attaching to the rotary tool, and slides on the socket portion so that torque can be transmitted to the socket portion and the socket portion. A rod-shaped shank portion that is held and to which torque is transmitted from the rotary tool, a magnet member is attached to a tip end side of the shank portion, and the socket portion is arranged in the direction of the rotation axis with respect to the socket portion. A sliding hole through which the shank portion slides, a holding portion that is provided on the distal end portion side and fits and holds the fastening member, and a nonmagnetic member fixed between the holding portion and the magnet member It is characterized by including.

Preferably, when the shank part approaches the holding part side, the fastening member held by the holding part is held by the magnetic force by the magnet member via the non-magnetic member, and the shank part is the holding part. When separated from the side, the non-magnetic member can block the magnetic force from the magnet member so that the magnetic force does not reach the holding portion side.
More preferably, the approach limit to the holding part side by the shank part is a position where the magnet member contacts the non-magnetic body, and the separation limit from the holding part side by the shank part is the shank part. Can be configured so as not to be detached from the socket portion.

More preferably, the said shank part can be comprised so that it can slide freely between the approach position to the said holding | maintenance part side, and the separation position from the said holding | maintenance part side.
More preferably, the fastening member may be a hexagonal drill screw, a tapping screw, or a drilling tapping screw having a head portion, and the holding portion may have a hexagonal hole shape.

  More preferably, the fastening member is a bit that rotates any one of a drill screw, a tapping screw, and a drilling tapping screw having a cross hole or a square hole at the head, and the holding portion has a cross shape or a square shape. In addition, a bit holding unit for holding the bit can be provided.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to hold | maintain a drill screw, a tapping screw, etc. with a magnet, the attachment (Socket holder (nut setter), bit holder) which the iron powder discharged | emitted by screwing does not adhere at the time of completion | finish of work can be provided. .

It is a 3rd view of the attachment (socket holder) for rotary tools which concerns on the 1st Embodiment of this invention. It is a perspective view (magnet approach side) of the attachment of FIG. It is a perspective view (magnet separation side) of the attachment of FIG. It is a disassembled perspective view of the attachment of FIG. It is a figure for demonstrating the operation | work operation | movement of the attachment of FIG. It is a 3rd page figure of the attachment (bit holder) for rotary tools which concerns on the 2nd Embodiment of this invention. It is a perspective view (magnet approach side) of the attachment of FIG. It is a perspective view (magnet separation side) of the attachment of FIG. It is a disassembled perspective view of the attachment of FIG. It is a figure for demonstrating the operation | work operation | movement of the attachment of FIG.

Hereinafter, the attachment for rotary tools which concerns on embodiment of this invention is demonstrated in detail based on drawing. In the following description, the same parts (portions) are denoted by the same reference numerals even in different embodiments. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.
<First Embodiment>
Below, socket holder (nut setter) 100 which is an example of the attachment for rotary tools which concerns on the 1st Embodiment of this invention is demonstrated.

[Socket holder structure]
FIG. 1 shows a three-side view of a socket holder 100 that is an example of an attachment for a rotary tool according to the first embodiment of the present invention. 1A is a top view of the socket holder 100, FIG. 1B is a side view thereof, and FIG. 1C is a bottom view thereof. 2 is a perspective view in which the magnet 170 is close to the resin plate 120 in the socket holder 100, FIG. 3 is a perspective view in which the magnet 170 is separated from the resin plate 120 in the socket holder 100, and FIG. The exploded perspective view of the holder 100 is shown, respectively.

As shown in FIGS. 1 to 4, the socket holder 100 is attached to a rotary tool (electrical impact tool or the like), and is a fastening member having a hexagonal head (hexagonal head) drill screw, tapping screw, and drilling. It is an attachment for rotating one of the tapping screws (hereinafter represented by a drill screw).
The socket holder 100 is roughly formed into a cylindrical socket portion 110 and a substantially hexagonal column shape (rod shape) that is slidably held on the socket portion 110 so that torque can be transmitted to the socket portion 110 and torque is transmitted from a rotating tool. It is comprised with the shank part 150. FIG. More specifically, a shank portion 150 which is a shaft portion on which a rotary tool on one end side in the rotation axis direction is mounted, and a holding portion 112 fitted to the head of a hexagonal head drill screw with a flange on the other end side are provided. The shank portion 150 and the socket portion 110 are slidably attached by a retaining mechanism composed of a ring spring 130 and a steel ball 140.

A thin cylindrical magnet 170 is attached to the front end side of the shank 150 (the side opposite to the rotary tool). Each of the socket part 110 and the shank part 150 is constituted by one member manufactured by die forging or the like.
More specifically, the shank portion 150 is a member that is die-forged so as to have a regular hexagonal cross section with an alloy steel having wear resistance and toughness. A locking part 152A for mounting on a hexagonal hole (mostly called an anvil) is formed, and a strong magnet 170 made of neodymium is press-fitted to the other end. Further, a ball sliding portion 156 having a diameter smaller than that of the shank portion 150 is formed in the vicinity of the magnet 170 so as to serve as a sliding allowance for the shank portion 150.

In addition, the socket portion 110 has a holding portion 112 such as a drill screw formed at one end in the direction of the rotation axis, and a fitting hole is formed at the other end by punching so that the cross section is a regular hexagon. The torque from the rotary tool is transmitted by fitting into the cross-sectional shape (regular hexagon) of the shank portion 150. Further, the steel ball 140 pressed from the socket part 110 by the ring spring 130 is fitted into the ball sliding part 156 so that the shank part 150 does not come out from the socket part 110. If the shank 150 is damaged, the steel ball 140 pushes up the ring spring 130 by pulling the shank 150 out of the socket 110, and the shank 150 is removed from the socket 110. The shank part 150 can be replaced.

[Shank part]
Hereinafter, the shank unit 150 will be described in more detail. The shank unit 150 includes a first torque transmission unit 152 that transmits torque from the rotary tool, a second torque transmission unit 154 that transmits torque to the socket unit 110, and a steel ball 140 provided in the socket unit 110. A ball sliding portion 156 that slides and a magnet holding portion 158 into which a magnet 170 is press-fitted are configured.

  The first torque transmission unit 152, the second torque transmission unit 154, and the magnet holding unit 158 have the same hexagonal shape in cross section (although it is not limited to a hexagonal column with an opposite side of 6.35 mm). The first torque transmission unit 152 and the second torque transmission unit 154 are configured by the same member and are only distinguished by the C pin 160. In order to position the C pin 160, a narrow groove into which the C pin 160 is fitted is provided on the surface of the boundary portion between the first torque transmission unit 152 and the second torque transmission unit 154. Further, since the magnet holding portion 158 has the same hexagonal cross section as the second torque transmission portion 154, torque is transmitted from the shank portion 150 to the socket portion 110 also in the magnet holding portion 158.

  The first torque transmission portion 152 is provided with a locking portion 152A having a columnar diameter smaller than that of the other portion to which a locking ball provided in the mounting hole of the rotary tool is locked. Further, the ball sliding portion 156 also has a smaller cylindrical shape than other portions. Both the locking portion 152A and the ball sliding portion 156 are R-shaped at both ends and smoothly connected to other portions of the hexagonal column shape, but need not have the same diameter, and the locking portion 152A is formed of an anvil. The ball sliding portion 156 only needs to correspond to the diameter of the locking ball and the diameter of the steel ball 140 provided in the socket portion 110, respectively.

[Socket part]
Hereinafter, the socket unit 110 will be described in more detail. The socket part 110 is provided on the distal end side with a sliding hole through which the shank part 150 slides in the rotation axis direction with respect to the socket part 110, and fits the hexagonal part of the head of the drill screw as a fastening member. And a holding portion 112 having a hexagonal hole shape. The sliding holes are a torque transmission hole 114 through which torque is transmitted from the rotary tool via the second torque transmission part 154 of the shank part 150 and a ball sliding hole 116 facing the ball sliding part 156 of the shank part 150. Composed. A steel ball 140 fixed by a ring spring 130 is provided at a substantially central portion in the rotation axis direction of the socket portion 110.

What is characteristic is that a thin plate-shaped resin plate 120 made of a non-magnetic member fixed by a groove 118 between the holding portion 112 and the magnet 170 is provided. The resin plate 120 is, for example, a polypropylene resin or a polyacetal resin that is thinly formed by injection molding or punching.
The positional relationship between the resin plate 120 and the magnet 170 will be described. The approach limit to the holding part 112 side by the shank part 150 is a position where the magnet 170 contacts the resin plate 120, and the separation limit from the holding part 112 side by the shank part 150 is that the shank part 150 is separated from the socket part 110. It is a position that does not leave. And between these two positions, the shank part 150 can slide freely between the approach position to the holding part 112 side and the separation position from the holding part 112 side.

These positions only need to satisfy the following conditions. For example, the approach limit may be before the magnet 170 abuts on the resin plate 120 (the magnet 170 pushes out the resin plate 120). As long as it is not positioned).
The condition is that when the shank part 150 approaches the holding part 112 side, the drill screw held by the holding part 112 is held by the magnetic force by the magnet 170 via the resin plate 120, and the shank part 150 is held by the holding part 112. This is a condition that when the magnet 170 is separated from the side, the magnetic force is not exerted on the holding portion 112 side because the magnet 170 is separated and the magnetic force by the magnet 170 is blocked by the resin plate 120. The fact that the magnetic force does not reach the holding portion 112 side means that iron powder as a facet does not adhere to the holding portion 112 due to the magnetic force. In order to satisfy this condition, the magnetic force of the magnet 170, the material and thickness of the resin plate 120, the position of the C pin 160, and the approach position and the separation position described above are set.

[Working movement of socket holder]
A working operation of the socket holder 100 according to the present embodiment having the above-described structure will be described.
FIG. 5 is a diagram showing a change over time when the socket holder 100 is mounted on the rotary tool 300, the drill screw 350 is held on the socket holder 100, and the drill screw 350 is screwed with the rotary tool 300.

  FIG. 5A shows the time when the screwing of the drill screw 350 is completed, and the magnet 170 is the closest position to the resin plate 120. FIG. 5B shows the rotary tool 300 being lifted upward and the magnet 170 being separated from the resin plate 120. FIG. 5C shows the rotary tool 300 being further lifted upward, and the magnet 170 is located farthest from the resin plate 120. FIG. 5D shows the case where the rotary tool 300 is further lifted upward and the rotary tool 300 is detached from the drill screw 350, and the magnet 170 maintains the position farthest from the resin plate 120.

  When the operator lifts the rotary tool 300 upward from the state shown in FIG. 5A, the socket 110 does not move upward, and the shank held by the rotary tool 300 as the rotary tool 300 moves upward. Only the part 150 moves upward. Since the shank part 150 moves upward without moving the socket part 110 upward, the magnet 170 that is closest to the resin plate 120 is separated from the resin plate 120 (FIG. 5B). At this time, the drill screw 350 remains held by the holding portion 112.

  When the operator lifts the rotary tool 300 further upward from the state shown in FIG. 5B, the socket portion 110 does not move upward until the steel ball 140 contacts the lower end R portion of the ball sliding portion 156. As the rotary tool 300 moves upward, only the shank portion 150 held by the rotary tool 300 moves upward. At this time, until the magnet 170 is farthest from the resin plate 120, the socket 110 does not move upward and the shank 150 moves upward (FIG. 5C). At this time, the drill screw 350 remains held by the holding portion 112.

  When the operator lifts the rotary tool 300 further upward from the state shown in FIG. 5C, the steel ball 140 is in contact with the lower end R portion of the ball sliding portion 156. The socket part 110 moves upward together with the shank part 150 held by the rotary tool 300 in accordance with the movement to. At this time, the position where the magnet 170 is farthest from the resin plate 120 is maintained (FIG. 5D). At this time, the drill screw 350 is detached from the holding portion 112.

  As shown in FIG. 5D, when the drill screw 350 is detached from the holding portion 112, that is, when a space for iron powder to enter the holding portion 112 is formed, the magnet 170 is farthest from the resin plate 120. Thus, the magnetic force of the magnet 170 does not reach the holding portion 112 side. For this reason, when the drill screw 350 is screwed in, the iron powder is discharged when a pilot hole is formed in a thin iron plate or the like by the cutting edge at the tip of the drill screw, but in the state of FIG. Even if the powder enters, the magnetic force of the magnet 170 does not reach, so that the iron powder does not adhere to the holding portion 112.

[Function and effect]
As described above, according to the socket holder 100 according to the present embodiment, when the rotary tool is pulled out after the completion of screwing of the drill screw 350, when the magnetic force of the magnet 170 reaches the holding portion 112 side, the holding is performed. Since the portion 112 fits and holds the head of the drill screw 350, a space for iron powder to enter the holding portion 112 is not formed, and the iron powder does not adhere to the holding portion 112. Further, when the holding portion 112 does not fit and hold the head of the drill screw 350, a space for iron powder to enter the holding portion 112 is formed, but the magnetic force of the magnet 170 does not reach the holding portion 112 side. Iron powder does not adhere to the portion 112. As a result, the drill screw 350 can be held by the magnet 170 with a very simple structure, and the socket holder 100 to which the iron powder discharged by the screwing does not adhere at the end of the screwing operation can be provided.

<Second Embodiment>
Below, the bit holder 200 which is an example of the attachment for rotary tools which concerns on the 2nd Embodiment of this invention is demonstrated. In the structure of the bit holder 200, portions overlapping with the above description will not be repeated here. For example, since the shank portion 150 is common to the socket holder 100 and the bit holder 200 according to the first embodiment, the shank portion 150 will not be described repeatedly here. 6 corresponds to FIG. 1, FIGS. 7 to 9 correspond to FIGS. 2 to 4, and FIG. 10 corresponds to FIG.

[Structure of bit holder]
FIG. 6 shows a three-side view of a bit holder 200 that is an example of an attachment for a rotary tool according to the second embodiment of the present invention. 6A is a top view of the bit holder 200, FIG. 6B is a side view thereof, and FIG. 6C is a bottom view thereof. 7 is a perspective view in which the magnet 170 is close to the resin plate 220 in the bit holder 200, FIG. 8 is a perspective view in which the magnet 170 is separated from the resin plate 220 in the bit holder 200, and FIG. The exploded perspective view of the holder 200 is shown, respectively.

  As shown in FIGS. 6 to 9, the bit holder 200 is attached to a rotary tool (electrical impact tool or the like), and the head is placed through a bit that is a fastening member (a jig as a member for fastening use). It is an attachment for rotating any one of a drill screw, a tapping screw and a drilling tapping screw with a cross hole or a square hole (hereinafter represented by a tapping screw).

  Like the socket holder 100 described above, the bit holder 200 is roughly slid and held in the cylindrical holder part 210 (corresponding to the socket part 110 described above) and the holder part 210 so that torque can be transmitted to the holder part 210. And a shank portion 150 having a substantially hexagonal column shape (bar shape) to which torque is transmitted from the rotary tool. Specifically, a bit holder for holding a bit having a shank portion 150 that is a shaft portion on which a rotary tool on one end side in the rotation axis direction is mounted and a cross driver shape that fits on the head of a tapping screw on the other end side. The shank portion 150 and the holder portion 210 are slidably attached by a retaining mechanism constituted by the ring spring 130 and the steel ball 140. .

Since the structure, material, and manufacturing method of the shank part 150 are the same as those of the first embodiment, the difference between the holder part 210 and the socket part 110 will be described below. The material and manufacturing method of the holder part 210 are the same as those of the socket part 110.
[Holder part]
Hereinafter, the holder unit 210 will be described in more detail. The holder part 210 is provided with a sliding hole through which the shank part 150 slides in the direction of the rotation axis with respect to the holder part 210 and a head part of a bit that is a fastening member (the cross part at the tip of the bit). A bit holding part 212 having a hexagonal hole shape for fitting and holding the hexagonal column part on the opposite end). Since the fastening member is a drill screw in the first embodiment and a bit in the second embodiment, the holder portion 210 corresponds to the socket portion 110, but the length thereof is different. Is clear. Further, the holder part 210 corresponds to the socket part 110 but includes a locking ball 214 that the socket part 110 does not have. The locking ball 214 is fitted into a groove provided in the body portion of the bit to prevent the bit from falling out of the holder portion 210. In the figure, the locking balls 214 are shown only at one place, but are usually provided at a plurality of places (for example, six places).

  As in the first embodiment, a characteristic feature is that a thin plate-shaped resin plate 220 made of a nonmagnetic member fixed by a groove 118 between the bit holding portion 212 and the magnet 170 is provided. It is a point provided. The resin plate 220 is the same as the resin plate 120 except for the shape (particularly the diameter). The positional relationship between the resin plate 220 and the magnet 170 is also the same as the positional relationship between the resin plate 120 and the magnet 170.

[Working operation of bit holder]
The working operation of the bit holder 200 according to the present embodiment having the above structure will be described.
FIG. 10 shows a case where the bit holder 200 is attached to the rotary tool 300, the bit 450 is held by the bit holder 200, the tapping screw 460 is held by the bit 450, and the tapping screw 460 is screwed by the rotary tool 300. It is a figure which shows a time change.

  FIG. 10A shows the time when the screwing of the tapping screw 460 is completed, and the magnet 170 is the closest position to the resin plate 220. FIG. 10B shows a state where the rotary tool 300 is being lifted upward, and the magnet 170 is being separated from the resin plate 220. FIG. 10C shows the rotary tool 300 being further lifted upward, and the magnet 170 is located farthest from the resin plate 220. FIG. 10D shows a state in which the rotating tool 300 is further lifted upward and the bit 450 held via the bit holder 200 attached to the rotating tool 300 is detached from the tapping screw 460. The position farthest from the resin plate 220 is maintained.

  When the operator lifts the rotary tool 300 upward from the state shown in FIG. 10A, the holder part 210 does not move upward, and the shank held by the rotary tool 300 as the rotary tool 300 moves upward. Only the part 150 moves upward. Since the holder part 210 does not move upward and the shank part 150 moves upward, the magnet 170 that is closest to the resin plate 220 is separated from the resin plate 220 (FIG. 10B). At this time, the tapping screw 460 is held by the bit 450.

  When the operator lifts the rotary tool 300 further upward from the state shown in FIG. 10B, the holder portion 210 does not move upward until the steel ball 140 contacts the lower end R portion of the ball sliding portion 156. As the rotary tool 300 moves upward, only the shank portion 150 held by the rotary tool 300 moves upward. At this time, the holder part 210 does not move upward and the shank part 150 moves upward until the magnet 170 is farthest from the resin plate 220 (FIG. 10C). At this time, the tapping screw 460 is held by the bit 450.

  When the operator lifts the rotary tool 300 further upward from the state shown in FIG. 10C, the steel ball 140 is in contact with the lower end R portion of the ball sliding portion 156. The holder part 210 moves upward together with the shank part 150 held by the rotary tool 300 along with the movement to. At this time, the position where the magnet 170 is farthest from the resin plate 220 is maintained (FIG. 10D). At this time, the tapping screw 460 is detached from the bit 450 held by the holder portion 210.

  As shown in FIG. 10D, when the tapping screw 460 is detached from the bit 450, the magnet 170 is farthest from the resin plate 220, and the magnetic force of the magnet 170 does not reach the bit holding portion 212 side. 450 does not reach the magnetic force of the magnet 170. For this reason, when the tapping screw 460 is screwed in, the iron powder is discharged when a hole is formed in a thin iron plate or the like by the cutting edge at the tip of the tapping screw. However, in the state of FIG. Even if it adheres, the magnetic force of the magnet 170 does not reach, so that iron powder does not adhere to the bit 450.

In this bit holder 200, when iron powder enters the bottom surface of the bit holding portion 212 of the holder portion 210, the shank portion 15 is pulled away from the holder portion 210.
If the magnet 170 is separated from the resin plate 220 by sliding 0, the iron powder can be easily discharged from the bottom surface of the bit holding portion 212.
[Function and effect]
As described above, according to the bit holder 200 according to the present embodiment, when the rotating tool is pulled out after the screwing of the tapping screw 460 is completed, the tip of the bit 450 does not fit and hold the head of the tapping screw 460. Since the magnetic force of the magnet 170 does not reach the holding portion 112 side, the iron powder does not adhere to the tip of the bit 450, or even if it adheres, the magnetic force does not act, so it can be easily removed. Because it can be done, there is no injury. As a result, the tapping screw 460 can be held by the magnet 170, and the bit holder 200 can be provided in which the iron powder discharged by screwing does not adhere to the bit 450 or hardly adheres to the bit 450 at the end of the screwing operation.

The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
For example, in the above-described FIGS. 5 and 10 and the description of those figures, the case where the drill tool or the tapping screw is screwed downward using the rotary tool and the rotary tool is pulled upward has been described. It is not limited to such a direction. When a rotary tool is used to screw a drill or tapping screw upward and the rotary tool is pulled upward, a rotary tool is used to screw a drill or tapping screw sideways and the rotary tool is pulled out sideways. Since the shank part 150 can freely slide between the approaching position to the holding part 112 or the holding part 212 side and the separation position from the holding part 112 or the holding part 212 side, the same effect is obtained. Is expressed.

  INDUSTRIAL APPLICABILITY The present invention can be suitably applied to an attachment for a rotary tool, and in particular, can hold a drill screw or a tapping screw with a magnet, and an attachment (socket holder (a Nut setter) and bit holder) can be suitably applied.

100 Socket holder (nut setter)
DESCRIPTION OF SYMBOLS 110 Socket part 120 Resin plate 130 Ring spring 140 Steel ball 150 Shank part 160 C pin 170 Magnet 200 Bit holder 210 Holder part 212 Bit holding part 214 Locking ball 220 Resin plate 300 Rotary tool socket part 350 Drill screw 450 Bit 460 Tapping screw

Claims (6)

An attachment for rotating a fastening member attached to a rotary tool,
It is composed of a cylindrical socket portion and a rod-shaped shank portion that is slidably held by the socket portion so that torque can be transmitted to the socket portion and torque is transmitted from the rotary tool. Members are attached,
The socket part is
A sliding hole through which the shank portion slides in the rotational axis direction with respect to the socket portion;
A holding portion that is provided on the tip side and holds the fastening member by fitting;
An attachment for a rotary tool, comprising a nonmagnetic member fixed between the holding portion and the magnet member. When the shank portion approaches the holding portion side, the fastening member held by the holding portion is held by the magnetic force by the magnet member via the nonmagnetic member,
2. The rotation according to claim 1, wherein when the shank part is separated from the holding part side, the magnetic force by the magnet member is blocked by the nonmagnetic member and the magnetic force does not reach the holding part side. Tool attachment. The approach limit to the holding part side by the shank part is a position where the magnet member comes into contact with the non-magnetic body,
The attachment for a rotary tool according to claim 2, wherein a separation limit from the holding portion side by the shank portion is a position where the shank portion is not detached from the socket portion.   4. The rotation according to claim 2, wherein the shank portion is freely slidable between an approach position to the holding portion side and a separation position from the holding portion side. 5. Tool attachment. The fastening member is one of a hexagonal drill screw, a tapping screw and a drilling tapping screw,
The said holding | maintenance part has hexagonal hole shape, The attachment for rotary tools in any one of Claims 1-4 characterized by the above-mentioned. The fastening member is a bit whose head rotates any of a drill screw, a tapping screw and a drilling tapping screw with a cross hole or a square hole,
The said holding | maintenance part is provided with the bit holding | maintenance part which hold | maintains the said bit while having a cross shape or a square shape, The attachment for rotary tools in any one of Claims 1-4 characterized by the above-mentioned.

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