JP3076117U - Bit tip structure - Google Patents

Abstract

(57) [Summary] [Problem] When screws are screwed into wood or a decorative board, the wood or decorative board at the screwed portion does not stand upside down.
The position pressed for positioning does not move,
The head of the screw after screwing does not float off the surface of wood or decorative board, etc., making it very easy to position, and the head of the screw on the surface of wood or decorative board etc. Provided is a bit tip structure that does not protrude. SOLUTION: A cutting portion 2a is provided at the tip of a plus-shaped ridge 1, and a cutting portion 2b is provided at a rear end of the ridge 1.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The idea is that when screwing a screw into wood or decorative plywood, it is easy to position the screw, or the tip of a bit to prevent the head from protruding after the screw is screwed. It is about structure.

[0002]

[Prior art]

 A plus-shaped ridge is provided at the tip of the bit that is fixed to the handle of a manual driver, or at the tip of a driver bit that is detachably attached to the handle of various types of drivers, such as manual and electric types. Is provided. This plus-shaped ridge has a tapered shape and is formed so as to gradually become thicker from the front end to the rear end.

When a screw is screwed into wood, decorative plywood, or the like using such a bit, the tip of the screw is positioned by pressing the tip of the screw at the screwing position, and a plus-shaped screw head is used. The screw was screwed in by inserting the plus-shaped ridge of the bit into the groove of the screw.

[0004]

[Problems to be solved by the invention]

 However, when screws are screwed into wood or decorative boards, etc. using the above-mentioned conventional bits, the wood or decorative board, etc. in the screwed portion may be upside down, and the screws may be screwed in. There was a problem that work became difficult.

[0005] In addition, when screws are screwed into wood or decorative boards using the conventional bits as described above, positioning is performed by pressing the tips of the screws. However, there is a problem that the position may move, which makes it very difficult to perform positioning.

Further, when screws are screwed into wood or decorative boards using the above-described conventional bits, even if the screws are intended to be completely screwed in, they may be screwed in after being screwed. There has been a problem that the head floats from the surface of the wood, the decorative board, etc., and protrudes from the surface of the wood, the decorative board, etc.

[0007] In view of the above, the present invention solves the above-mentioned conventional problem. When screws are screwed into wood or a decorative board, the wood or decorative board at the screwed portion does not stand upside down. In addition, the position pressed for positioning does not move, and the head of the screw after screwing does not float from the surface of wood, decorative board, etc., and positioning is extremely difficult. The purpose of the present invention is to provide a tip structure of a bit in which the head of the screw does not protrude from the surface of a wood, a decorative board, or the like, while being easy to make.

[0008]

[Means for Solving the Problems]

 For this reason, the tip structure of the bit of the present invention is such that the cutting portion 2a is provided at the tip of the plus-shaped ridge 1, and the cutting portion 2b is provided at the rear end of the ridge 1.

In the tip structure of the bit of the present invention, the cutting portion 2 a is formed by polishing the tip of a pair of opposed grooves 3 a of the plus-shaped groove 3.

Further, in the tip structure of the bit of the present invention, the cutting portion 2b is formed by polishing the rear end portion of at least one pair of opposed ridges 1a of the plus-shaped ridge 1. .

[0011]

[Embodiment of the invention]

 Hereinafter, an embodiment of the bit tip structure of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the tip structure of the bit according to the present invention is such that a cutting portion 2a is provided at the tip of a plus-shaped ridge 1, and a cutting portion 2b is provided at the rear end of the ridge 1. Is provided.

The cutting portion 2 a is formed by polishing the tip of a pair of opposed grooves 3 a of the plus-shaped groove 3. In this way, the cutting portions 2a are formed at all the tips of the two sets of the opposed ridges 1a, 1a of the plus-shaped ridge 1. The cutting portion 2a performs a cutting action when rotated clockwise, and functions to prevent the tip of the bit from rising when rotated counterclockwise.

The cutting portion 2b may be formed by polishing the rear end portion of at least one set of the opposing ridges 1a of the plus-shaped ridges 1. In the illustrated example, two sets are formed. The rear ends of the opposed protrusions 1a, 1a are formed by polishing. The cutting portion 2b cuts the contour of the screw pilot hole H as shown in FIG.

The various types of drivers, such as the manual type and the electric type, each having the tip structure of the bit of the present invention configured as described above are used as follows.

First, the bits of the various drivers and the tips of the plus-type ridges 1 provided at the tips of the driver bits are pressed to positions where the screws B are screwed into wood or decorative plywood. When the driver is slightly rotated to the right, the surface of wood or decorative plywood is slightly cut by the cutting portion 2a at the tip of the plus-shaped ridge 1, and the tip of the plus-shaped ridge 1 is positioned at that position. . When the screwdriver is further rotated to the right while being pressed, the contour of the screw pilot hole H is cut by the cutting part 2b at the rear end of the plus-shaped ridge 1 to form the screw pilot hole H as shown in FIG. Is done.

Then, a plus-shaped ridge 1 provided at the tip of the driver is fitted into the plus-shaped groove 4 of the screw B, and the tip of the screw B is pressed against the bottom of the screw hole H. If the driver is turned to the right, the screw B will be screwed into wood or decorative plywood, etc., as shown in FIG. It does not penetrate and float on the surface of wood or decorative plywood, etc., and does not protrude on the surface of wood or decorative plywood.

The screw B can be removed by inserting the screw-type ridge 1 of the screwdriver into the screw-shaped groove 4 of the screw B screwed into the wood or decorative plywood and rotating counterclockwise. In this case, the cutting portion 2a at the tip of the plus-shaped ridge 1 cuts into the plus-shaped groove 4 of the screw B to prevent the tip of the bit from floating from the groove 4. And the screw B can be easily removed.

[0019]

[Effect of the invention]

 Since the tip structure of the bit of the present invention is configured as described above, when screws are screwed into wood or decorative board, the wood or decorative board etc. of the screwed part will be upside down. The position of the screw pressed for positioning does not move, and the head of the screw after screwing does not float from the surface of wood, decorative board, etc. It is easy and the head of the screw does not protrude on the surface of wood or decorative board.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a tip portion of a bit of a driver implementing a bit tip portion structure of the present invention.

FIG. 2 is a plan view showing a tip of a bit of the driver of FIG. 1;

FIG. 3 is an explanatory view showing a state in which a screw prepared hole is formed in wood, decorative plywood, or the like using a screwdriver that implements the tip structure of the bit of the present invention.

FIG. 4 is an explanatory view showing a state in which a screw is screwed into a screw lower hole formed in wood, decorative plywood, or the like using a driver implementing the tip structure of the bit of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Protrusion 1a Opposing projection 2a Cutting part 2b Cutting part 3 Groove 3a Opposing groove

Claims (3)

[Utility model registration claims] 1. A bit of a bit, characterized in that a cutting portion (2a) is provided at the tip of a plus-shaped ridge (1) and a cutting portion (2b) is provided at a rear end of the ridge (1). Tip structure. 2. The cutting section (2a) is formed by polishing the tip of a pair of opposed grooves (3a) of a plus-shaped groove (3). Bit tip structure. 3. The cutting portion (2b) is formed by polishing a rear end of at least one pair of opposed ridges (1a) of a plus-shaped ridge (1). Claim 1
Tip structure of the described bit.