JP2001121441A - Bit with strong magnet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable cost reduction by extending a life, while destruction of the strong magnet is prevented due to a shock when an attracted screw is brought into attractive contact. SOLUTION: In this bit with strong magnet, interposing a strong magnet 3 attractively holding a screw 2 by strong magnetic force in a recessed part 11 of a bit 1, the bit with strong magnet constitutes a shock relaxing member 4, relaxing a shock when the screw 2 interposed in the recessed part 11 of the bit 1 to be attached by magnetic force comes into contact with the strong magnet 3, by a sharing member 41 allotting partly the shock when the screw 2 attracted by magnetic force abuts on the strong magnet 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a bit with a strong magnet in which a strong magnet for attracting and holding a screw by a strong magnetic force is inserted in a recess of the bit, wherein the screw attracted by the magnetic force is applied to the strong magnet. The present invention relates to a bit with a strong magnet, which is provided with an impact-reducing member for relieving the impact at the time of contact.

[0002]

2. Description of the Related Art As shown in FIGS. 7A and 7B, a conventional bit with a magnet attracts and holds a screw S by the magnetic force of a magnet M inserted into a recess C of a bit B. In this case, the worker attaches the screw S to the product in a state where the screw S is sucked into the recess C of the bit B.

[0003]

In the above-mentioned conventional bit with magnet, the screw is attracted and held by the magnetic force of the magnet inserted in the recess of the bit, so that the bit is strong like a recent rare earth magnet. When a strong magnet having a strong magnetic force is used, the impact of the attracted screw when the bit B is attracted to the concave portion C and the impact when the screw S is attracted by the worker to the product while the screw S is attracted in the concave portion C of the bit B are generated. In addition, the magnet may be broken, resulting in a short service life, an increase in cost, and a decrease in the attraction force of the screw.

Accordingly, the present inventor has proposed a magnetic magnet bit in which a strong magnet for attracting and holding a screw by a strong magnetic force is inserted in a recess of the bit, and the magnetic force is reduced by an impact relaxation member inserted in the recess of the bit. Focusing on the technical idea of the present invention that alleviates the impact at the time of contact of the screw with the strong magnet sucked by the screw, and as a result of further research and development, the impact at the time of suction of the sucked screw and the screw The present invention achieves the object of reducing the impact when the worker attaches to the product in a state where it is sucked in the recess of the bit, preventing the destruction of the strong magnet, and extending the life and enabling cost reduction. The invention has been reached.

[0005]

According to a first aspect of the present invention, there is provided a bit with a strong magnet, in which a strong magnet for attracting and holding a screw by a strong magnetic force is inserted into a recess of the bit. In the magnet-attached bit, an impact-absorbing member that alleviates the impact of the screw attracted by the magnetic force when the screw comes into contact with the strong magnet is inserted into the recess of the bit.

[0006] In the bit with a strong magnet according to the present invention (the second invention according to the second aspect), in the first invention, the impact relaxation member is configured such that the screw abutted by the magnetic force attracts the screw to the strong magnet. It is constituted by a sharing member that shares a part of the impact of time.

According to a third aspect of the present invention, there is provided the bit with a strong magnet according to the first aspect, wherein the shock absorbing member is provided between the screw attracted by magnetic force and the strong magnet. It is constituted by an interposed insertion member, and is configured such that the sucked impact at the time of contact of the screw acts on the strong magnet indirectly.

[0010] In the bit with a strong magnet according to the present invention (the fourth invention according to claim 4), in the second invention, the sharing member is configured such that the inner wall defining the outer wall of the strong magnet and the recess of the bit. And an annular member made of an elastic material interposed to the same or higher position as the contact surface of the strong magnet.

[0009] In the bit with a strong magnet according to the present invention (fifth invention according to claim 5), in the third invention, the interposer is made of an elastic material disposed on a contact surface of the strong magnet. And the plate-shaped member is interposed between the attracted screw and the contact surface of the strong magnet.

[0010] In the bit with a strong magnet according to the present invention (the sixth invention according to claim 6), in the third invention, the interposing member covers the surface of the strong magnet in the concave portion of the bit. It is constituted by a covering member made of a material.

[0011] In the bit with a strong magnet according to the present invention (the seventh invention according to claim 7), in the first invention, the shock absorbing member is made of an elastic material having relative elasticity to the strong magnet. It is constituted by an elastic member made of the above.

[0012] In the bit with a strong magnet according to the present invention (the eighth aspect of the present invention), in the seventh aspect, the elastic member is made of any one of synthetic resin, rubber, non-ferrous metal or a material similar thereto. It is configured.

[0013]

According to the first aspect of the present invention, there is provided a bit with a strong magnet according to the first aspect of the present invention, wherein a strong magnet for attracting and holding a screw by a strong magnetic force is inserted into a recess of the bit. When the worker attaches to the product in a state where the screw attracted by the magnetic force abuts on the strong magnet and the screw is attracted into the recess of the bit by the shock absorbing member inserted in the recess, the screw is attracted into the recess of the bit. In this way, it is possible to prevent the strong magnet from being destroyed due to the impact of the sucked screw when it is attracted and attached to the product, and to extend the life and reduce the cost.

According to a second aspect of the present invention, there is provided the bit with a strong magnet according to the first aspect, wherein the sharing member constituting the shock absorbing member is configured such that the screw abutted to the strong magnet is attracted by the magnetic force. Since a part of the impact at the time is shared, the effect of reducing the impact of the strong magnet when the sucked screw is attracted and when the screw is attached to the product is produced.

According to a third aspect of the present invention, there is provided the bit with a strong magnet according to the first aspect, wherein the bit inserted between the screw and the strong magnet attracted by a magnetic force constituting the shock absorbing member. By the interposing member, the impact at the time of contact of the sucked screw is indirectly applied to the strong magnet, so that the direct contact of the sucked screw is avoided and the screw is The effect of reducing the impact of the strong magnet at the time of adsorption and attachment to the product is exhibited.

According to a fourth aspect of the present invention, there is provided the bit with a strong magnet according to the second aspect of the present invention, wherein the annular member made of an elastic material constituting the sharing member includes an outer wall of the strong magnet and a recess of the bit. Since it is inserted to the same or higher position as the contact surface of the strong magnet between the inner wall and the inner wall, a part of the impact when the screw comes into contact with the strong magnet attracted by the magnetic force. Because we share
This has the effect of reducing the impact of the strong magnet when the sucked screw is attracted and attached to the product.

According to a fifth aspect of the present invention, there is provided the bit with a strong magnet according to the third aspect, wherein in the third aspect, the plate-like member made of an elastic material is disposed on a contact surface of the strong magnet constituting the interposing member. However, since it is interposed between the attracted screw and the contact surface of the strong magnet, the impact at the time of contact of the attracted screw is indirectly applied to the strong magnet. In addition, it is possible to avoid the direct contact of the sucked screw and to reduce the impact of the strong magnet when the screw is attracted and attached to a product.

In the bit with a strong magnet according to a sixth aspect of the present invention, the covering member made of an elastic material constituting the interposition member may be provided on the surface of the strong magnet in the recess of the bit. Because the coating is applied, in order to indirectly apply the impact at the time of contact of the attracted screw to the strong magnet, avoid direct contact of the attracted screw, and The effect of reducing the impact of the strong magnet at the time of suction and at the time of attachment to a product is achieved.

In the bit with a strong magnet according to the seventh aspect of the present invention having the above-mentioned structure, in the first aspect, the shock absorbing member is constituted by the elastic member made of an elastic material having elasticity relative to the strong magnet. Has been
The effect of reducing the impact of the screw attracted by the magnetic force when the screw contacts the strong magnet and when the screw is attached to the product is reduced by the elastic deformation of the elastic member.

In the bit with a strong magnet according to an eighth aspect of the present invention, the elastic member is made of any one of a synthetic resin, rubber, a non-ferrous metal, or a material similar thereto in the seventh aspect. When the screw attracted by the magnetic force abuts on the strong magnet and attaches to the product, the impact of the screw is reduced by the elasticity of any one of the synthetic resin, rubber, non-ferrous metal or similar material constituting the elastic member. This has the effect of being relaxed by deformation.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings.

(First Embodiment) As shown in FIGS. 1 to 4, a bit with a strong magnet according to the first embodiment is a strong magnet for attracting and holding a screw 2 in a concave portion 11 of the bit 1 by a strong magnetic force. In the bit with a strong magnet inserted therein, the strong magnet 3 of the screw 2 inserted into the recess 11 of the bit 1 and attracted by magnetic force.
The impact mitigation member 4 for alleviating the impact at the time of abutting on the screw is constituted by a sharing member 41 that shares a part of the impact at the time of the abutment of the screw on the strong magnet attracted by the magnetic force. is there.

As shown in FIG. 2, the bit with a strong magnet comprises a large-diameter hollow cylindrical portion forming a socket (bit box portion), and a hollow cylindrical portion having a small diameter as compared with the large-diameter hollow portion. And a mounting portion 14 formed integrally with the other end of the shaft portion 13.

In the bit with a strong magnet, the distal end portion 12 constituting the socket (bit box portion) has a hollow cylindrical portion having a larger diameter than the shaft portion 13 of the small hollow cylindrical portion constituting the other shaft portion. And the inner wall 12 of the tip 12
1 inserts the head 21 of the screw 2
The prismatic recess 11 is formed.

The concave portion 11 of the distal end portion 12 is made of a rod-shaped cobalt magnet or a rare earth magnet such as an Nd-Fe-B magnet fixed to the inner peripheral wall 131 of the shaft portion 13 of the small-diameter hollow cylindrical portion. The strong magnet 3 is inserted coaxially.

The strong magnet 3 is coaxially inserted inside a fixed distance from the end face of the tip portion 12, that is, the fixed distance is equal to the head 2 of the screw 2 as shown in FIG.
1 substantially corresponds to the axial length of the screw 2
The washer 22 mounted on the front end portion 12 is configured to contact the end face of the distal end portion 12.

As shown in FIGS. 1 and 3, the sharing member 41 is provided between the outer side wall 32 of the strong magnet 3 and the inner side wall 121 constituting the recess 11 of the bit 1. It is constituted by an annular member 411 made of an elastic material inserted up to the same position (FIG. 1) or higher position (FIG. 3) as the contact surface 31 at the tip.

The elastic material constituting the annular member 411 may be made of any one of synthetic resin, rubber, non-ferrous metal, and similar materials. In the first embodiment, a synthetic resin is used as an example. , And is integrally mounted in the concave portion 11 of the distal end portion 12 by an adhesive.

When the recess 11 of the bit 1 is brought closer to the screw 2, the strong magnet 3 inserted in the recess 11 has the strong magnet with the strong magnet according to the first embodiment. The screw 2 is attracted into the recess 11 of the bit 1 by magnetic force.

The attracted screw 2 is attracted by the strong magnetic force of the strong magnet 3 so as to abut on the contact surface 21 at the tip of the strong magnet 3. The impact when the screw 2 is brought into contact with the strong magnet 3 attracted by the magnetic force by the inserted shock absorbing member 4 and when the worker attaches to the product while the screw is adsorbed in the recess of the bit. This is to reduce the impact.

The sharing member 41 constituting the shock absorbing member 4 shares a part of the impact when the screw 2 comes into contact with the strong magnet 3 attracted by the magnetic force of the strong magnet 3. That is, the annular member 411 made of an elastic material constituting the sharing member 41 is provided between the outer wall 32 of the strong magnet 3 and the inner wall 121 constituting the recess 11 of the bit 1. Since it is inserted to the same or higher position as the contact surface 31, if the annular member 411 is the same height, the impact of the screw 2 attracted by the magnetic force when the screw 2 contacts the strong magnet 3 is attracted. When the annular member 411 is inserted up to a high position, the strong magnet 3 of the screw 2 attracted by magnetic force is used while being shared at a ratio determined by the area ratio.
It is responsible for most of the impact when abutting against the product and when attaching to the product.

The bit with a strong magnet according to the first embodiment having the above-described operation is applied to the strong magnet 3 of the screw 2 attracted by the magnetic force by the shock absorbing member 4 inserted in the recess 11. This absorbs the shock when the screw 2 is sucked into the recess of the bit and absorbs the shock when the worker attaches to the product while the screw is in the recess of the bit. In this state, it is possible to prevent the strong magnet 3 from being broken due to an impact when the worker attaches to the product, and to prolong the life and reduce the cost.

Further, the bit with a strong magnet according to the first embodiment is different from the sharing member 41 constituting the shock absorbing member 4.
However, it shares part of the impact of the screw 2 attracted by the magnetic force when the screw 2 comes into contact with the strong magnet 3 and the impact when the operator attaches the screw to the product while the screw is adsorbed in the recess of the bit. This has the effect of reducing the impact of the strong magnet 3 when the sucked screw 2 is attracted and attached to the product.

Further, in the bit with a strong magnet according to the first embodiment, the annular member 411 made of an elastic material constituting the sharing member 41 connects the outer wall 32 of the strong magnet 3 and the concave portion 11 of the bit 1. The inner wall 12 to be constituted
1 and a part of the impact when the screw 2 comes into contact with the strong magnet 3 attracted by the magnetic force because the screw 2 is inserted to the same or higher position as the contact surface of the strong magnet 3 between the two. Or because it shares most of the screw 2
The effect of reducing the impact of the strong magnet 3 at the time of adsorption and attachment to the product is exhibited.

In the bit with a strong magnet according to the first embodiment, since the shock absorbing member 4 is formed of the elastic member made of an elastic material having elasticity relative to the strong magnet 3, the magnetic force is reduced. The effect of absorbing the shock of the screw 2 when the screw 2 is brought into contact with the strong magnet 3 and when the screw 2 is attached to a product is absorbed and reduced by the elastic deformation of the elastic member.

Further, in the first embodiment, since the elastic member is made of the synthetic resin,
The effect of reducing the impact of the screw 2 attracted by the magnetic force at the time of contact with the strong magnet 3 and at the time of attachment to the product is reduced by the elastic deformation of the synthetic resin constituting the elastic member.

(Second Embodiment) In a bit with a strong magnet according to a second embodiment, as shown in FIG. 5, the shock absorbing member 4 is connected to the screw 2 and the strong magnet 3 attracted by magnetic force. The strong magnet 3 is constituted by an interposed member 42 interposed between the strong magnet 3 and the shock when the screw 2 is sucked in contact with the screw 2 and when the screw 2 is attached to a product. This is a difference from the first embodiment, and the following description will focus on the difference.

That is, the interposing member 42 is constituted by a plate-shaped member 421 made of an elastic material and disposed on the contact surface 31 of the strong magnet 3. The configuration is such that the plate-shaped member 421 is interposed between the plate-shaped member 421 and the contact surface 31.

The bit with a strong magnet according to the second embodiment is
By the insertion member 42 inserted between the screw 2 sucked by the magnetic force constituting the shock absorbing member 4 and the strong magnet 3, the shock and the screw at the time of the contact of the screw 2 sucked and the screw When the worker attaches the product to the product while the suction force is absorbed in the recess of the bit, the impact is applied to the strong magnet 3 indirectly.

Moreover, since the plate-like member 421 interposed between the screw 2 forming the interposing member 42 and the contact surface 31 of the strong magnet 3 is made of an elastic material, The impact at the time of abutment and attachment to the product is absorbed and reduced by the elastic deformation of the plate-shaped member 421 made of an elastic material.

The bit with a strong magnet according to the second embodiment is
By the insertion member 42 inserted between the screw 2 and the strong magnet 3 constituting the shock absorbing member 4, the impact at the time of contact of the screw 2 sucked is indirectly absorbed by the strong magnet. 3 so that the impact is applied,
While avoiding direct contact of the sucked screw 2, the impact of the strong magnet 3 when the screw 2 is attracted and the impact when an operator attaches the product to the product while the screw is attracted in the recess of the bit. The effect of reducing is achieved.

That is, in the bit with a strong magnet according to the second embodiment, the plate-like member 421 made of an elastic material and disposed on the contact surface 31 of the strong magnet 3 constituting the interposing member 42 has the following features. Since it is interposed between the attracted screw 2 and the contact surface 31 of the strong magnet 3, the impact at the time of contact of the attracted screw 2 acts indirectly on the strong magnet 3. In this way, it is possible to avoid the direct contact of the screw 2 sucked and to reduce the impact of the strong magnet 3 when the screw 2 is attracted and when the screw 2 is attached to a product.

Further, in the bit with a strong magnet according to the second embodiment, the plate-like member 421 interposed between the screw 2 forming the interposition member 42 and the contact surface 31 of the strong magnet 3 is formed. Since the elastic member is made of an elastic material, the sucked shock at the time of contact of the screw 2 is absorbed and reduced by the elastic deformation of the elastic member made of the plate member 421, that is, the plate member 421 acts as a damper. This has the effect of reducing the impact of the strong magnet 3 when the screw 2 is attracted and attached to the product.

(Third Embodiment) In a bit with a strong magnet according to a third embodiment, as shown in FIG. 6, the insertion member 42 in the second embodiment is The difference from the second embodiment lies in that it is constituted by a covering member 422 made of an elastic material for covering the surface of the strong magnet 3. Hereinafter, the difference will be mainly described.

The bit with a strong magnet of the third embodiment is
Since the covering member 422 made of an elastic material constituting the interposing member 42 covers the surface of the strong magnet 3 in the concave portion 11 of the bit 1, when the screw 2 is sucked and comes into contact with the product. The impact at the time of mounting is indirectly applied to the strong magnet 3.

Moreover, since the covering member 422 for covering the surface of the strong magnet 3 constituting the interposing member 42 is made of an elastic material, when the screw 2 sucked comes into contact with the screw 2 and is attached to the product. The impact is absorbed and reduced by the elastic deformation of the covering member 422 made of an elastic material.

The bit with a strong magnet of the third embodiment is
Since the covering member 422 made of an elastic material constituting the interposing member 42 covers the surface of the strong magnet 3 in the recess 11 of the bit 1, the impact at the time of the contact of the screw 2 sucked can be reduced. In order to make an impact act on the strong magnet 3 indirectly, the screw 2
This prevents the direct contact of the strong magnet 3 and reduces the impact of the strong magnet 3 when the screw 2 is attracted and attached to the product.

Further, in the bit with the strong magnet according to the third embodiment, since the covering member 422 covering the surface of the strong magnet 3 constituting the interposing member 42 is made of an elastic material, 2 is absorbed and alleviated by the elastic deformation of the covering member 422 made of an elastic material, that is, the covering member 422 acts as a damper, so that the screw 2 is attracted and attached to the product. This has the effect of reducing the impact of the strong magnet 3.

The above-described embodiments have been described by way of example only, and the present invention is not limited to these embodiments. Those skilled in the art will recognize from the claims, the detailed description of the invention, and the drawings. Modifications and additions are possible without departing from the technical idea of the present invention.

In the above-described second or third embodiment, as an example, the plate-like member 421 or the plate-like member 421 constituting the interposition member 42 between the screw 2 and the contact surface 31 of the strong magnet 3 is used. With the covering member 422 interposed,
The strong magnet 3 and the inner wall 1 constituting the recess 11
I explained an example where nothing intervenes between this and 21.
The present invention is not limited to these, and the strong magnet 3 and the concave portion 1 are similar to the first embodiment described above.
1, an annular member made of an elastic material is interposed between the inner wall 121 and the inner wall 121 to add the operation and effect of the first embodiment to the operation and effect of the second or third embodiment. Embodiments can also be employed.

In the above-described embodiment, an example has been described in which a screw is sucked into the concave portion 11 of the bit 1 as an example. However, the present invention is not limited thereto, and a bolt, nut, + or- The present invention can be applied to an embodiment in which a screwdriver, other rotary tools, and the like are sucked into the recess 11.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along line AA of FIG. 2 showing a main part of a bit with a strong magnet according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the entire bit with a strong magnet according to the first embodiment.

FIG. 3 is a cross-sectional view showing an example in which an annular member higher than a contact surface of a strong magnet is interposed in the first embodiment.

FIG. 4 is a cross-sectional view showing a state in which a screw is sucked in the first embodiment.

FIG. 5 is a sectional view showing a main part of a bit with a strong magnet according to a second embodiment of the present invention.

FIG. 6 is a sectional view showing a main part of a bit with a strong magnet according to a third embodiment of the present invention.

FIG. 7 is a sectional view showing a conventional bit with magnet.

[Explanation of symbols]

 1 Bit 2 Screw 3 Strong Magnet 4 Shock Absorbing Member 11 Recess 41 Sharing Member

Claims (8)

[Claims] 1. A bit with a strong magnet, in which a strong magnet for attracting and holding a screw by a strong magnetic force is inserted in a concave portion of the bit, wherein the impact of the screw attracted by the magnetic force when the screw comes into contact with the strong magnet is provided. A bit with a strong magnet, wherein a shock absorbing member to be relieved is inserted in a recess of the bit. 2. The shock absorbing member according to claim 1, wherein the shock absorbing member is constituted by a sharing member that shares a part of the shock when the screw attracted by the magnetic force comes into contact with the strong magnet. And a bit with a strong magnet. 3. The shock absorbing member according to claim 1, wherein the shock absorbing member is constituted by an insertion member inserted between the screw attracted by magnetic force and the strong magnet. A bit with a strong magnet, characterized in that a shock at the time is indirectly applied to the strong magnet. 4. The device according to claim 2, wherein the sharing member is located at a position equal to or higher than a contact surface of the strong magnet between an outer wall of the strong magnet and an inner wall forming a recess of the bit. A bit with a strong magnet, characterized by being constituted by an annular member made of an inserted elastic material. 5. The device according to claim 3, wherein the interposed member is formed of a plate-shaped member made of an elastic material disposed on a contact surface of the strong magnet, and the screw and the strong magnet are attracted. A bit with a strong magnet, wherein the plate-shaped member is configured to be interposed between the bit and the contact surface. 6. The bit with a strong magnet according to claim 3, wherein the interposing member is constituted by a covering member made of an elastic material for covering a surface of the strong magnet in the recess of the bit. . 7. The bit with a strong magnet according to claim 1, wherein the shock absorbing member is made of an elastic member made of an elastic material having elasticity relative to the strong magnet. 8. The bit with a strong magnet according to claim 7, wherein the elastic member is made of any one of a synthetic resin, rubber, a non-ferrous metal, or a material similar thereto.