JP3128497U - Torsion bit with plastic encapsulation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torsion bit having a plastic enveloping part for differentiating from a conventional torsion bit forming a thin-walled part, improving discrimination and improving appearance beauty and durability.
SOLUTION Bits 2 and 2 are formed at both ends, and a thin portion 3 of a torsion bit of a hexagonal material 4 forming a thin portion 3 between bits 2 and 2 is filled with plastic 1 and encapsulated. This plastic 1 is a color plastic and is formed by insert molding. Further, it is flush with the hexagonal material 4.
[Selection] Figure 1

Description

  The present invention relates to a torsion bit having bits at both ends and having a thin portion at the center (between bits), and more particularly, to a torsion bit having a plastic encapsulating portion formed by encapsulating the thin portion with plastic.

There are various types of torsion bits, and examples of types that prevent breakage of the bits and improve durability include those shown in FIG. This torsion bit is formed by forming bits 2 and 2 for turning a plus screw at both ends of the hexagonal member 4 and forming a thin portion (small diameter portion) 3c at the center side thereof. When screwing using this torsion bit, the thin portion 3c is first torsionally deformed by torsional torque to prevent the bit 2 from being damaged. For this reason, this torsion bit can be reused for screw tightening with a small value of torsional torque, and the life can be improved.
Further, as shown in FIG. 6, the bit has a screw portion 2 a that can be screwed to the broken screw 5 at one end, and a drill 6 for holding the screw portion 2 a to the broken screw 5 at the other end. The torsion bit is formed with a thin portion 3b composed of three punched portions 7 as shown in the drawing.
Further, although different from that of FIG. 4, “Patent Document 1” is one of known techniques. Further, “Patent Document 2” is known as a known technique in which a collar is provided on the center side of the torsion bit so that the number and shape of the torsion bit are different so that the torsion bit can be easily and quickly taken out.
Registered utility model No. 3118978 (Figure 1) Registered Utility Model No. 3115607 (Figure 1)

  As described above, the “slim-shaped ribbed torsion bit” of Utility Model Registration No. 3118978 in FIGS. 5 and 6 and “Patent Document 1” is intended to prevent damage to the bit and improve durability. Like “Color Bit” in “Utility Model Registration No. 3115607” of “Patent Document 2”, there is a case where “scratch” is likely to be attached to the thin portion during use or during use. Further, “Color Bit” in “Patent Document 2” is discriminating, but is colored and has a problem that fading and peeling are likely to occur. Also, the painting work is troublesome, and there is a problem that masking or the like is necessary at the time of painting.

  The present invention solves the above-described problems. The thin portion of the torsion bit having a thin portion is encapsulated with plastic, and the outer surface of the square member and the outer surface of the encapsulated plastic are substantially flush with each other. Provided is a torsion bit having a plastic enveloping portion that is formed by insert molding to improve manufacturing efficiency, and further, plastic is provided as a color plastic so as to be distinguished, thereby improving durability and improving appearance. For the purpose.

  In order to achieve the above object, the present invention provides a torsion bit in which a bit is formed at both ends of a square bar, and a thin portion is formed between the bits of the square bar. The torsion bit is characterized in that plastic is fixed to the thin wall portion, and the outer surface of the plastic and the outer surface of the square member are formed substantially flush with each other.

  The invention of claim 2 is characterized in that the plastic is formed by insert molding.

  The invention of claim 3 is characterized in that the plastic is made of color plastic.

  According to the torsion bit having the plastic enveloping part of the present invention, the thin part is encapsulated with plastic so as to be protected, and the appearance is improved.

  Further, according to the torsion bit having the plastic enveloping portion of claim 2 of the present invention, since the plastic encapsulating is performed by insert molding, it is possible to improve the working efficiency and the fixing property.

  According to the torsion bit having the plastic enveloping part of the present invention, the plastic is made of color plastic, and it is possible to improve the discrimination and the appearance. In addition, it can be differentiated from those without plastic encapsulation.

  Embodiments of a torsion bit having a plastic envelope according to the present invention will be described below in detail with reference to the drawings.

  As shown in FIG. 1, the torsion bit before being encapsulated with plastic consists of the one shown in FIG. Of course, it is not limited to this shape. That is, the bits 2 and 2 are formed at both ends of the hexagonal material 4, and the thin portion 3 is formed in the central portion between the bits 2 and 2 of the hexagonal material 4 with the hexagonal material 4 left at both edges. . In this case, the thin portion 3 is generally circular in cross section, but of course is not limited thereto.

  As shown in FIG. 1A, the plastic 1 is fixed by encapsulating the thin portion 3, and this fixing is formed by insert molding with an insert molding machine (not shown). As shown in FIG. 1B, the plastic 1 is a hexagonal material that is the same shape as the hexagonal material 4 and is formed flush with the hexagonal material 4. Further, although not shown in the drawing, the plastic 1 is made of various colors and has distinguishability.

  As shown in FIG. 2, the torsion bit according to the second embodiment is formed by forming thin portions 3a and 3a on the left and right sides of the hexagonal material 4A in the central portion. The plastics 1a and 1a are formed by encapsulating the thin portions 3a and 3a. In addition, although the cross-sectional shape of this part is not shown in figure, it consists of what is shown in FIG.1 (b) of Example 1. FIG. As described above, substantially the same effect as in the first embodiment can be obtained.

  As shown in FIG. 3, the torsion bit according to the third embodiment is formed by forming the thin portion 3b having the bore portion 7 shown in FIG. 6 at the center portion, but the plastic 1b is filled in the bore portion 7 and covers the whole. Consists of.

  As shown in FIG. 4, the torsion bit of Example 4 has a screw portion 2a and a chuck-shaped portion 2b shown in FIG. 6, and a thin portion 3b filled with plastic 1b to cover the whole.

Although the torsion bits having various shapes are shown in the first to fourth embodiments, the present invention is not limited to the torsion bits having the above-described structure, and is applied to all torsion bits that form a thin portion between both end bits. .
As described above, by providing the color plastic of the present invention, it is possible to differentiate from a torsion bit having a thin wall portion without plastic encapsulation and to improve durability and appearance beauty.

  The torsion bit having the plastic enveloping part of the present invention is of course applied to a torsion bit having a thin part, but is also applicable to a tool having a thin part other than the torsion bit, and its use range is wide.

The front view (a) which shows one of the Examples of the torsion bit which has the plastic enveloping part of this invention, and the AA sectional view (b) of Fig.1 (a). The front view which shows another Example of the torsion bit which has the plastic encapsulation part of this invention. The front view (a) which shows another Example of the torsion bit which has the plastic enveloping part of this invention, and the BB sectional drawing (b) of Fig.3 (a). The front view which shows the other Example of the torsion bit which has the plastic encapsulation part of this invention. The front view of the torsion bit generally used conventionally. A front view (a) showing an example of a conventional torsion bit in which a threaded portion or a chuck-shaped portion is formed in the bit portions at both ends and a hollow portion is formed in the central portion, and a cross-sectional view taken along line CC in FIG. 6 (a) (b) ).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plastic 1a Plastic 1b Plastic 2 Bit 2a Screw part 2b Chuck shape part 3 Thin part 3a Thin part 3b Thin part 4 Hexagonal material 4A Hexagonal material 5 Damaged screw 6 Drill 7 Overburden part

Claims (3)

  A torsion bit in which a bit is formed at both ends of a square bar and a thin part is formed between the bits of the square bar, wherein the torsion bit has plastic attached to the thin part, and the outer surface of the plastic and the square bar A torsion bit having a plastic enveloping portion, characterized in that the outer surface is substantially flush with the outer surface.   The torsion bit having a plastic envelope according to claim 1, wherein the plastic is formed by insert molding. 3. The torsion bit having a plastic encapsulating portion according to claim 1, wherein the plastic is made of color plastic.

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