JPH1044056A - Box driver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a nut and head of a bolt to be magnetically attracted and held by magnetizing magnetic poles different in the inner and outer peripheral sides in a box part. SOLUTION: The inner peripheral part in the inside and outer peripheral parts of a box part 13 are magnetized with different magnetic poles, for example the inner peripheral side is magnetized with the S pole and the outer peripheral side with the N pole (vice versa will do). When a nut is not fitted in a fitting hole 13a, an outside magnetic pole (free magnetic pole) will be generated, and when the nut is not fitted in the fitting hole 13a, the outer part magnetic pole (free magnetic pole) will be generated and when the nut is fitted in the fitting hole 13a, the free magnetic pole will not be generated. When the nut is fastened to a bolt, the nut is magnetically attracted to the fitting hole 13a by fitting the nut in the fitting hole 13a, and the nut is not dropped off from the box part 13 even if a box driver 11 is directed laterally or downward, so that the nut as it is can be located in the tip part of the bolt and fastened thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box driver used for tightening and loosening bolts and nuts.

[0002]

2. Description of the Related Art A box driver used for tightening and loosening bolts and nuts is provided with a box portion for fitting with a nut or bolt head at a tip end of a shaft, and a grip portion at a base end portion. ing. Then, for example, when tightening the nut to the bolt, after screwing the nut to the bolt, the box portion of the box driver is fitted to the nut, and the grip portion is gripped and turned to tighten the nut. .

However, in this case, it is necessary to screw the nut into the bolt in advance. For example, in the case of tightening the nut in a narrow place where a finger cannot enter, the nut is previously fitted to the box portion of the box driver. In such a state, the nuts are held together, and the nuts are screwed into bolts to be tightened.

[0004] However, when the nut is tightened with respect to the downward bolt, the nut can be held in a state where the nut is fitted to the box portion.
Since the nut comes off from the box portion, the nut cannot be tightened while holding the nut in the box portion in advance as described above.

Therefore, as shown in FIG. 6, by magnetizing the box portion 2 at the front end of the box driver 1, for example, a permanent magnet 3 having an N pole at the front end and an S pole at the rear end is formed. It has been attempted to hold the nut 4 in a state fitted to the box portion 2 by magnetically attracting the box portion 2. Even if the nut 4 is fitted into the box portion 2 due to magnetic poles around the nut portion, the nut 4 is inverted by 180 ° due to the magnetic force, jumps out, and is attracted to the outside of the box portion 2.

[0006]

Therefore, in the box driver, even if a permanent magnet is formed in the box portion to magnetically attract the nut, the nut is not stable and the nut is fitted in the box portion. Cannot be retained.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to enable a head of a nut or a bolt to be magnetically attracted and held in a box portion, so that a narrow finger-free area is provided. It is an object of the present invention to provide a box driver that can be easily tightened at a location and can improve workability.

[0008]

According to the present invention, in order to achieve the above-mentioned object, a first aspect of the present invention relates to a box driver having a box portion at a tip end thereof for fitting with a nut or bolt head. Different magnetic poles are magnetized on the inner peripheral side and the outer peripheral side inside the box portion.

According to a second aspect of the present invention, there is provided a box driver having a box portion at a tip portion for fitting with a head of a nut or a bolt, wherein different magnetic poles are attached to the inner bottom and the outer periphery of the inner bottom of the box. It is characterized by mounting a magnetized ring-shaped permanent magnet.

According to a third aspect of the present invention, in a box driver having a box portion fitted at the tip end thereof with a head of a nut or a bolt, the inner bottom portion of the box portion is provided with a predetermined gap in a circumferential direction so that different magnetic poles are adjacent to each other. And a ring partially magnetized at a plurality of locations.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a first embodiment, in which a box driver 11 comprises a shaft 12, a box portion 13 provided at a distal end portion of the shaft 12, and a grip portion 14 provided at a base end portion of the shaft 12. It is composed of The box portion 13 is provided with, for example, a hexagonal fitting hole 13 a for fitting with the hexagonal nut 15 and a relief hole 13 b for the bolt 16.

Further, different magnetic poles are provided on the inner peripheral side and the outer peripheral side inside the box portion 13, for example, the S pole 17 is provided on the inner peripheral side.
a, the N pole 17b (or vice versa) is magnetized on the outer peripheral side,
When the nut 15 is not fitted in the fitting hole 13a,
As shown by the arrow a, an external magnetic pole (free magnetic pole) is generated, and when the nut 15 is fitted in the fitting hole 13a, no free magnetic pole is generated. The arrow b indicates the flow of the line of magnetic force, a magnetic attraction is generated between the S pole 17a and the N pole 17b, and the nut 15 is magnetically attracted while being fitted into the fitting hole 13a.

Therefore, when the nut 15 is fastened to the bolt 16, the nut 15 is magnetically attracted to the fitting hole 13a by fitting the nut 15 into the fitting hole 13a.
Even if the box driver 11 is turned sideways or downward, the nut 15 does not fall from the box portion 13, and the nut 15 can be positioned and fastened to the tip of the bolt 16 as it is.

FIG. 4 shows a second embodiment, in which the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. A ring-shaped permanent magnet 18 made of metal or ferrite is fixed to the inner bottom of the fitting hole 13a in the box portion 13 of the box driver 11. The permanent magnet 18 has different magnetic poles on the inner and outer sides, for example, an N pole 19a on the inner side, and an S pole 19b on the outer side (or vice versa).
When the nut 15 is not fitted in the fitting hole 13a, an external magnetic pole (free magnetic pole) is generated as shown by an arrow a, and the nut 15 is fitted in the fitting hole 13a. When fitted, no free magnetic pole is generated. The arrow b indicates the flow of the magnetic field lines, and the N pole 19a and the S pole 1
9b, a magnetic attraction force is generated, and the nut 15 is magnetically attracted while fitted in the fitting hole 13a.

Therefore, according to this embodiment, the same operation and effect as those of the first embodiment can be obtained, and the permanent magnet 18 can be formed without magnetizing the box portion 13 as in the first embodiment. Since it is only mounted, it is easy to manufacture and has an effect that it can be provided at low cost. Also,
When the magnetic attraction force of the permanent magnet 18 becomes weak, the reproduction can be performed only by replacing the permanent magnet 18.

Further, after the permanent magnet 18 is magnetized into a rubber-based ferrite, the elasticity of the permanent magnet 18 is used to fit the fitting hole 13a.
By adopting the manufacturing means to insert the hologram into the device, the manufacturing can be further simplified and provided at a low cost.

FIG. 5 shows a third embodiment, in which the same components as those in the second embodiment are denoted by the same reference numerals and description thereof is omitted. The ring 20 fixed to the inner bottom of the fitting hole 13a in the box portion 13 of the box driver 11 is partially magnetized at a plurality of positions at predetermined intervals in the circumferential direction. N pole 22a, S pole 22b, N pole 22a, S pole 22b so that different magnetic poles are adjacent to each other.
Are formed. Therefore, as shown by arrow a,
An external magnetic pole (free magnetic pole) is generated, and a magnetic attraction force is generated between the adjacent north pole 22a and south pole 22b, and the nut 15 is magnetically attracted while being fitted into the fitting hole 13a. Is done.

Therefore, according to the present embodiment, the same functions and effects as those of the second embodiment can be obtained. In the above-described embodiments, the hand-type box driver 11 having the grip portion 14 at the base end of the shaft 12 has been described. However, the present invention can be applied to a box driver mounted on an electric tool such as an electric drill.

[0019]

As described above, according to the claims of the present invention, different magnetic poles are magnetized on the inner peripheral side and the outer peripheral side inside the box portion of the box driver. The heads of the nuts and bolts can be magnetically fitted and held, and the tightening workability of the nuts and bolts can be improved.

According to the second aspect, a ring-shaped permanent magnet in which different magnetic poles are magnetized on the inner peripheral side and the outer peripheral side is mounted on the inner bottom portion of the box portion. Manufacturing can be facilitated.

According to the third aspect, a ring partially magnetized at a plurality of locations at predetermined intervals in the circumferential direction so that different magnetic poles are adjacent to each other is mounted on the inner bottom of the box portion. The same effect as in the item 2 can be obtained.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a part of a box driver according to a first embodiment of the present invention.

FIG. 2 is an enlarged longitudinal sectional side view of a box portion of the embodiment.

FIG. 3 is an operation explanatory view of the embodiment.

4A and 4B show a second embodiment of the present invention, in which FIG. 4A is a longitudinal sectional side view of a box portion of a box driver, and FIG. 4B is a perspective view of a permanent magnet.

FIG. 5 is a perspective view of a partially magnetized ring showing a third embodiment of the present invention.

FIG. 6 is a partially sectional side view of a conventional box driver.

[Explanation of symbols]

 11 box driver 12 axis 13 box part 17a S pole 17b N pole

Claims (3)

[Claims] 1. A box driver having a box portion at a tip portion for fitting with a nut or bolt head, wherein different magnetic poles are magnetized inside and outside the box portion. And a box driver. 2. A box driver having a box portion fitted at its tip with a nut or bolt head, wherein a different magnetic pole is magnetized on an inner bottom side and an outer periphery side of an inner bottom portion of the box portion. Box driver with a permanent magnet. 3. A box driver having a box at its tip for fitting with the head of a nut or bolt, wherein a predetermined interval is provided in the circumferential direction at the inner bottom of the box so that different magnetic poles are adjacent to each other. A box driver characterized by mounting partially magnetized rings at multiple locations.