JP2002160173A - Screwdriver shaft and screwdriver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable easy tightening or removal of a screw having a crushed head groove or the like during or after tightening various screws, screw spikes or bolts. SOLUTION: In a screwdriver 6 having a holding member 5 at a rear part 4 of a screwdriver shaft 1 having a tip part 2 to engage with a groove formed on a heat part of a screw, screw spike or bolt, a projection part 3 is formed at a tip center of the tip part 2 of the screwdriver shaft 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a screw or a screw nail,
It is used to remove or screw in a screw whose head groove is crushed at the construction site where the bolt is used, or at a general household, etc., especially when the head groove is completely crushed. It relates to the driver shaft and driver used to remove the + (plus) screw.

[0002]

2. Description of the Related Art Conventionally, at a construction site or the like, mounting work of various building materials has been performed using screws, screw nails, and bolts. In addition, each home also uses a screw or the like to attach a wall or a shelf.

[0003]

However, for example, when a screwdriver is used to attach a screw using a + screwdriver or a portable electric screwdriver, the + groove at the head of the + screw may be completely crushed by mistake. There are often. In such a case, the driver's tip is strongly pressed against the + groove where the tip of the driver is crushed and the driver is turned, but the driver's tip slips without being caught on the crushed head and the screw works well. Could not be turned.

[0004] Therefore, it is very difficult to remove the screw completely crushed in the + groove of the head, and there is also a problem that the portion where the screw is removed is damaged. Furthermore, in a construction site or the like where a large number of screws and the like are handled, such a screw processing operation has been a serious problem in terms of work efficiency.

[0005] The present invention has been developed in view of the above-mentioned point, and various screws, screw nails or bolts can be used during or after screwing, and can be used to remove screws whose head grooves have been crushed. It is an object of the present invention to provide a driver shaft and a driver that can be easily screwed or removed.

[0006]

The present invention has the following configuration in order to effectively achieve the above object. That is, the driver shaft according to the first aspect of the present invention is a driver shaft having a tip portion formed so as to be engaged with a groove formed in a head of a screw, a screw nail or a bolt.
A projection is formed in the center of the tip of the shaft.

According to a second aspect of the present invention, there is provided a driver shaft according to the first aspect, wherein at least a rear portion has a hexagonal cross section.

According to a third aspect of the present invention, there is provided a driver according to the present invention, wherein a rear end of a driver shaft having a front end formed so as to be able to engage with a groove formed in a head of a screw, screw nail or bolt. In a driver provided with a member, a projection is formed at the center of the tip of the tip of the shaft.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a driver shaft of the present invention, FIG. 2 is a perspective view of a driver of the present invention, FIG. 3 is a perspective view of a driver shaft of another example of the present invention, and FIG. FIG. 5 is an enlarged front view of the front end portion, and FIG. 5 is an explanatory diagram showing a use state of the driver shaft of the present invention.

As shown in FIG. 1, reference numeral 1 denotes an example of a driver shaft according to the present invention, which is formed by processing a round shaft of an appropriate thickness and length made of a metal material such as steel. The tip 2 is flattened so that it can be engaged with a + groove (not shown) formed in the head 8a of the bolt, screw or screw nail. The tip 2 is hardened.

At the center of the tip 2a of the driver shaft 1, a projection 3 projecting forward from the tip 2a is formed. The projection 3 has a chevron shape and a top 3 of the tip 2a.
a is sharp. Also, the corners 3b, 3 on both sides of the tip 2a
c is square. Furthermore, both side surfaces 2b and 2c of the tip 2 are formed in parallel. Of course, both side surfaces 2b and 2c need not be parallel. The shape of the projection 3 may be any shape as long as the top 3a is pointed. Further, both corners 3b and 3c are provided with the top 3
The shape may be pointed forward like a.

FIG. 2 shows an example of a driver 6 according to the present invention in which a gripping member 5 is provided on a rear portion 4 of the driver shaft 1 described above. The rear portion 5a of the gripping member 5 is formed of a hard material so that it can be hit with a hammer or the like. The shape and size of the gripping member 5 are not limited to the illustrated example, and may be other shapes and sizes. Of course, the material of the gripping member 5 is not particularly limited, and may be freely determined.

Next, a portable electric drill, a portable electric screwdriver, a portable air drill, a portable air screwdriver, a portable air wrench, a portable tool drill, a screwdriver or a wrench, etc. are used by temporarily replacing them. As a possible driver shaft 1a according to the present invention, as shown in FIG. 3, an annular groove 7 is formed near the rear end 4a of the driver shaft 1a, and the rear portion 4 is formed in a hexagonal cross section.
The hexagonal cross section may be the entirety of the driver shaft 1a other than the distal end portion 2. Of course, the cross section of the driver shaft is
Other polygonal shapes are also free. Since the configuration of the other parts of the driver shaft is the same as that of the example of FIG. 1 described above, the same portions are denoted by the same reference numerals and detailed description is omitted.

When the driver shaft 1a of this embodiment is used, first, the top 3a of the tip 2a of the driver shaft 1a is brought into contact with the completely crushed + screw mortar-shaped center (see FIG. 5). As a result, the top 3a of the projection 3 is naturally located at the center of the mortar-shaped recess 9, and both corners 3b, 3c on both sides of the projection 3 are supported by the top 3a with respect to the mortar-shaped recess 9. It is located at equal intervals on the left and right. Thereafter, the rear end of the driver shaft 1a is hit with a hammer. As a result, the top 3a and both corners 3b, 3c of the projection 3 bite into the mortar-shaped recess 9 of the crushed screw 8. After this, when a portable electric drill is used, for example, the drill is once removed from the portable electric drill, and the rear part 4 of the driver shaft 1a is detached from the portable electric drill body (not shown). , The portable electric drill body is driven, and the driver shaft 1a is rotated in a desired direction.

As a result, the screw 8 whose + groove is crushed rotates together with the driver shaft 1a, and is easily screwed into the screw member 10.
Or screwed into the threaded member 10.

A driver 6 as shown in FIG.
(See FIGS. 2 and 5), the driver shaft 1 is inserted into the crushed mortar-shaped concave portion 9 of the + groove (not shown) of the head 8a of the screw 8 being screwed while gripping the gripping member 5. Projection 3
And hit the rear end of the gripping member 5 with a hammer. As a result, the top 3a and the corners 3b and 3c bite into the recess 9 as described above, and the screw 8 with the + groove is easily screwed into the screwing member 10 by turning the gripping member 5 in a desired direction. , Screwed member 10
Or can be removed from

[0017]

As is clear from the above description, the driver shaft of the present invention has a projection formed at the center of the distal end of the driver shaft. By pressing and hitting, this projection cuts into the original groove where the screw or the like was crushed, and the two corners of the tip at equal intervals with the projection also bite into the head evenly, and in this state the driver shaft By turning the screw in a desired direction, a screw or the like can be easily turned and removed or screwed. Therefore, even when the groove of the head such as the screw is crushed, it can be easily processed in a short time.

Also, since at least the rear portion of the driver shaft is formed in a hexagonal cross section, it can be easily attached to a portable electric screwdriver having a hexagonal hole for attachment or detachment, or a portable tool such as an electric or portable air screwdriver. Can be. Therefore, by performing the above-described processing for the screw whose head groove is crushed with these tools, the operation of removing the screw and the like can be further promoted.

Further, with the driver according to the present invention in which the gripping member is provided at the rear portion of the driver shaft, anyone at home can easily perform the above-described processing such as a screw whose head groove is crushed.

[0020]

[Brief description of the drawings]

FIG. 1 is a perspective view of a driver shaft of the present invention.

FIG. 2 is a perspective view of a driver according to the present invention.

FIG. 3 is a perspective view of a driver shaft according to another example of the present invention.

FIG. 4 is a front view of an enlarged distal end portion of a driver shaft.

FIG. 5 is an explanatory view showing a use state of the driver shaft of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Driver shaft 1a Driver shaft 2 Tip 2a Tip 3 Projection 4 Rear 5 Grasping member 6 Driver 8 Screw 8a Head

Claims (3)

[Claims] 1. A driver shaft having a front end formed so as to be able to engage with a groove formed in a head of a screw, a screw nail or a bolt, a projection is formed at the center of the front end of the front end of the shaft. A driver shaft characterized by that. 2. The driver shaft according to claim 1, wherein at least a rear portion has a hexagonal cross section. 3. A driver having a gripping member provided at a rear portion of a driver shaft having a tip portion formed so as to be able to engage with a groove formed in a head portion of a screw, a screw nail or a bolt. A driver having a protrusion formed at the center of the tip.