JPH0130812Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a call line for inserting or wiring an electric wire or the like into a pipe.

[Conventional technology]

Hitherto, call lines with printed numerical values and scales as shown in Japanese Utility Model Application Publication No. 59-161316 have been known. The cross section was circular or rectangular. Since printing was performed directly on the surface of the nominal line with such a cross section, as shown in Fig. 4, if the nominal line a is inserted into a tubular body b such as a cylindrical pipe or tube,
The outer circumferential wall c of the call line a was sliding on the inner circumferential surface d of the tubular body b.

[Problem that the invention attempts to solve]

When the call line was used, there was a problem in that the printed surface of the call line a slid directly on the inner circumferential surface d of the tubular body b, causing the printing to wear away. In addition, the above-mentioned Utility Model 59-
Even with the rectangular cross-section of No. 161316, there was a problem in that the vicinity of the corners were worn away, causing the printing on the corners to disappear.

This invention solves these conventional problems and
The purpose of the present invention is to provide a call line whose markings such as scales are not easily worn out during use.

[Means for solving problems]

The nominal wire of the present invention has a cross section based on a substantially circular or substantially regular polygon, and has a concave groove continuously formed on the outer circumferential wall from the distal end to the proximal end parallel to the axial direction, Further, the bottom surface of the groove was used as a printing surface.

[Effect]

Concave grooves are continuously formed on the outer circumferential wall from the distal end to the proximal end parallel to the axial direction, and the bottom of the concave grooves is used as the printing surface. Even when inserted into the body, the printed surface will not slide against the inner circumferential wall of the tubular body.

〔Example〕

Hereinafter, the present invention will be explained in detail based on the drawings shown in the examples.

In FIGS. 1 and 2, reference numeral 1 denotes a reference wire used for pulling wired materials such as electric wires into a cylindrical tubular body 2 such as a pipe or tube, and the length dimension of the tubular body 2. It has a scale 3 for measuring. Specifically, the nominal wire 1 is made of a linear body with a substantially square cross section, and a concave groove portion 5 is continuously formed on one side of the outer peripheral wall 4 from the distal end to the proximal end in parallel with the axial direction. form into a shape. Furthermore, the four corners of the outer peripheral wall 4 are chamfered to form a flat surface. Then, the scale 3 is printed on the bottom surface 6 of the groove portion 5, and the bottom surface 6 is used as a printing surface 7. In addition, to use the call wire 1, insert the call wire 1 from one end of the tubular body 2 to the other end, bend the tip of the call wire 1, and connect the wired material to the bent portion. Alternatively, a connecting tool having a hook part is attached to the tip of the call wire 1, and the wired material is connected to the connecting tool. Then, the call line 1
The wired material is inserted into the tubular body 2 by pulling it in a direction opposite to the insertion direction. Furthermore, a scale 3 is printed on the nominal line 1 so that the length dimension of the tubular body 2 can be measured when the nominal line 1 is inserted into the tubular body 2.

Note that the concave groove portion 5 is not limited to one side, but also two sides, three sides, etc.
It is also possible to form a plurality of printing surfaces 7 on the sides or all the sides. Further, the cross section of the call wire 1 may have a shape based on a substantially circular shape or a substantially regular polygonal shape.

The call line 1 configured as described above has the printing surface 7
Since the scale 3 is flat, it is easy to print the scale 3. Further, the protruding side wall surface 8 of the call line 1,
8 slides on the inner circumferential wall 9 of the tubular body 2, so that the bottom surface 6 of the concave groove portion 5, that is, the printed surface 7, does not slide on the inner circumferential wall 9.

Next, FIG. 3 shows a modified example, in which the nominal line 1 shown in FIG. Concave groove portions 5 are formed. Furthermore, the groove portion 5
The bottom surface 6 is the printing surface 7. Therefore,
As in the above embodiment, the printing surface 7 is the inner peripheral wall 9 of the tubular body 2.
There is no sliding movement.

[Effect of idea]

Even if inserted into a tubular body such as a cylindrical pipe or tube, the printed surface on the bottom surface 6 of the groove 5 will not slide against the inner circumferential wall of the tubular body, so even if used for a long time, it will not be difficult to indicate dimensions, etc. The printing will not wear out and its service life will be increased.

In addition, since it has a cross section based on a substantially circular or regular polygon, the axis can be curved with equal softness in all four and eight directions, and there is no directionality. It can be easily inserted into pipes that are three-dimensionally twisted.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of essential parts showing an embodiment of the present invention;
FIG. 2 is a sectional view showing the state of use, and FIG. 3 is a sectional view of a modified example. FIG. 4 is a sectional view showing the state of use of the conventional example. 4...Outer peripheral wall, 5...Concave groove, 6...Bottom surface, 7
...Printed surface, 10...Flat surface.

Claims (1)

[Scope of utility model registration request] A groove 5 is continuously formed in the outer circumferential wall 4 from the distal end to the proximal end in parallel with the axial direction, and has a cross section based on a substantially circular or regular polygonal shape. The calling line is characterized in that the bottom surface 6 of 5 is used as a printing surface 7.