JPS606232A - Bending tool for wire-shaped body - Google Patents

Abstract

PURPOSE:To improve workability and to bend a wire-shaped body to a semicircular shape with high accuracy by constituting a bending tool of a pair of specific bar-shaped operating members having the same constitution. CONSTITUTION:The operator inserts both ends of a wire-shaped body 4 into guiding holes 17, 22, holds operating parts 10, 11 with both hands and bends said parts until the parts are paralleled. The body 4 is bent to an arc shape within one plane running the axial line of the members 10, 11. The circular edges 12a, 18a at the ends 12, 18 of the members 10, 11 are in contact with each other in this stage. When the members 10, 11 are further displaced in the approaching direction as shown by reference codes 24, 25, the ends 14a, 20a of operating parts 14, 20 are displaced around the end edges 12b, 18b at the ends 12, 18 of the members 10, 11 until the ends 14a, 20a come into contact with each other. The bent arc shape of the body 4 is thus prevented from restoring the original shape and the exact semicircular shape is formed by plastic deformation.

Description

TECHNICAL FIELD The present invention relates to a bending tool for bending a linear body into a semicircular arc shape.

BACKGROUND ART Such a semicircular arc-shaped linear body is required, for example, in a high frequency circuit. As shown in Figure 1, a high-frequency cable that is a linear body has a central conductor 1, a dielectric 2 surrounding it made of fluorocarbon resin, and an outer conductor made of copper or the like surrounding the dielectric 2. It consists of 3. From the linear shape of such a linear body, as shown in FIG. 2, the inner diameter R1
It is curved into a circular arc shape. This linear body is, for example, the third
As shown in the figure, it is used as an inductance constituting a mutual transmission circuit in the high frequency oscillation circuit 4. The center conductor 1 of this linear body 4 is fixed to a printed wiring board by soldering or the like.

The linear body 4 used in such applications needs to be formed accurately, otherwise the resonant frequency will change. Press the linear body 4 against a metal fitting having a radius of about 1,
Although it can be bent, the precision is poor and a large force is required to bend such a linear body 4, resulting in poor workability.

Purpose An object of the present invention is to provide a linear object bending tool that improves workability and can bend a linear object into a semicircular arc shape with high precision.

Embodiment FIG. 4 is a sectional view of an embodiment of the present invention as seen from the front. This linear bending tool consists of a pair of rod-shaped operating members 10 and 11 having the same configuration.

The operating member 10.11 has a circular cross section perpendicular to its axis, and its axis is straight. The mutually opposite ends 12 of the operating member 10.11 have a uniform outer diameter over the axial length l, and the outer diameter of the remaining portion is smaller than the outer diameter of the one end 12. Ru. The outer diameter of the one end portion 12 is indicated by reference numeral R.
2.

A truncated conical portion 13 is formed continuous with the one end portion 12 . A right cylindrical operating portion 14 is connected to the small diameter portion of the truncated conical portion 13 . The end portion 15 of the operating portion 14 is knurled to prevent slipping during handling. A recess 16 extending in the axial direction is formed in one end portion 12 . This recess 1
6 is a conical shape recessed inward in the axial direction (downward in FIG. 4 of the operating member 10) by a length 11. A guide hole 17 is formed facing the recess 16 and extending concentrically with the outer peripheral surface of the operating member 10, that is, coaxially with the axis of the operating member 10.

The length of this guide hole 17 is indicated by reference numeral 12.

The other operating member 11 is also constructed in the same manner as the one above, with one end portion 18 having a uniform outer diameter in the axial direction, a truncated conical portion 19, and an operating portion 2.
0, and a recess 21 and a guide hole 22 are formed therein.

In bending the linear body 4, a predetermined straight linear body 4 is prepared. Both ends of this linear body 4 are inserted into the guide holes 17.22. The recess 16.21 is conical so that the end of the wire 4 can be easily inserted into the guide hole 17.22. This condition is shown in FIG.

Then, grasp the operating member 10.11 with both hands and bend it parallel to each other as shown in FIG. As a result, the linear body 4 is bent into an arc shape within a plane passing through the axes of the operating members 10 and 11.

In this case, the periphery 1 of the ends 12, 18 of the operating member 10.11
2B and 18a are in contact with each other. Therefore, the operation member 10.
11 in the proximal direction as indicated by reference numerals 24.25. This allows one end 12 of the operating member 10.11 to
．． 18 edge 12b.

181) as a fulcrum, the end 14a of the operating portion 14.20
, 20 & are displaced until they come into contact. In this way, the curved arc shape of the linear body 4 is prevented from returning, and an accurate semicircular arc portion is plastically deformed and formed.

In the embodiment described above, the recesses 16 and 21 were conical, but as an embodiment of the present invention, when the linear body 4 is bent, the concave portions 16 and 21 may be formed in other shapes to the extent that they do not come into contact with the linear body 4. It may be a recess that has a shape.

Effects As described above, according to the present invention, a linear body can be bent so as to have a semicircular arc-shaped portion within one plane by a simple operation. This semicircular arc shape will be curved with high precision.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a linear body 4 that can be processed by the bending tool of the present invention, FIG. 2 is a plan view showing the linear body 4 bent into a semicircular arc shape, and FIG. A simplified plan view of the transmitting circuit 5 including the linear body 4, FIG. 4 is a sectional view of an embodiment of the present invention, and FIG. 51 shows the bending of the linear body 4 using the operating member 10.11. It is a sectional view showing a process. 4... Linear body, 10.11... Operation member, 12.1
8... One end part, 18.19... Fractional conical part, 14.2
0...Operation part, 16.21...Recessed part, 17.22.
... Guide hole agent Patent attorney Kei Nishi Part s1 Figure 4 Ward i 0 X11 19 1'1 Square R2'\21 σ ' 16 ζ″′Tao・00ku× 5 Jin 20a 14a

Claims (1)

[Claims] Consisting of a pair of rod-shaped operating members having the same configuration, the operating members have a circular cross section perpendicular to the axis, one end that faces each other has a uniform outer diameter in the axial direction, and the outer diameter of the remaining portion is The wire is formed smaller than the outer diameter of one end thereof, a recess extending in the axial direction is formed in the one end, and a guide hole is formed facing the recess and extending concentrically with the outer circumferential surface. Bending tool for shaped bodies.