JPS5897449A - Wire having loop and its manufacture - Google Patents

Abstract

PURPOSE:To manufacture a wire excellent in strength in manufacturing a wire for corona discharge having looped and coiled parts at both ends by forming the loops making the wire itself a core wire. CONSTITUTION:A W-wire 10 is pulled out from a drum 31 mounted to a tension motor 32 and hung on a hook 22 through a clamp 33 and a guide 34, and pulled out in the direction or rotation axis that separates from the hook 22. The W- wire 10 is hung on a hook 22' of opposite side, and to eliminate slack, remaining bent part is turned once around the W-wire 10, and held by a clamp 33' through a guide 34'. The tension motor 32 and a brake motor 41 are driven to give specified tension to the W-wire 10. At the same time, the W-wire between the hook 22' and clamp 33' is wound making the W-wire between hooks 22 and 22' as a core. Thus, a wire 1 having looped parts 1 and coiled parts 12 at both ends is obtained.

Description

[Detailed description of the invention] and its manufacturing method.

Generally, in electronic copying machines, tungsten wires with gold-plated or oxidized surfaces are used as corona discharge or heater wires. This type of wire needs to be set with a predetermined tension applied to a predetermined location inside the copying machine, and up until now both ends of the wire have been directly fixed with screws, etc., or loops have been formed at both ends of the wire. The method used was to hang it by holding it in place.

However, there is no way to fix it directly with screws etc.

This is not practical because it may cause defects in the wire at the fixed portion. The method of forming loops at both ends of the twisted wire has the following disadvantages because the loops are formed by twisting. In other words, the structure is such that the folded part of the wire is twisted several times around the wire at the base of the loop.

■The twisted part gradually loosens and the tension changes.

■The wire strength at the twisted part decreases.

In view of these drawbacks, the present invention seeks to provide a wire with a loop that has a strong loop that does not change the overall length and strength of the wire even when tension is applied for a long period of time, and a method for manufacturing the same. be.

The present invention is characterized in that the loops at both ends of the wire are formed by winding the folded portion of the wire several times in a single winding method using the wire itself as a core wire.

The present invention will be explained in detail below.

FIG. 1 shows an example of a wire with a corona discharge loop according to the present invention.

This wire 1 is a tungsten wire 1 having a predetermined diameter and a predetermined length.
A loop 11 of a predetermined diameter is formed at both ends of the 0. Of course, the material of the tungsten wire 10 used is one that has been subjected to treatments such as gold plating and oxidation as described above. The loop 11 is formed by folding both sides of the tungsten wire 10 at a predetermined length and winding the folded portion several times into a coil using the tungsten wire 10 itself as a core wire, as will be described in detail later. It is.

Such a wire 1 has - a heavily wound coiled portion 12 formed over a predetermined length;
The coiled portion 12 will not loosen due to the tension acting on the coil, and the mechanical strength will not deteriorate during winding.

Stability can be maintained over a long period of time.

Next, a method for manufacturing the wire shown in FIG. 1 will be explained.

FIG. 2 schematically shows, in plan view, an apparatus for carrying out the method of the invention.

In Figure 2, 21 and 21' are respectively hook pins 2
2.22' is a drill chuck that holds 23.23' is a gear, and 24.24' is a bearing for the shaft 25.

Reference numeral 26 denotes a clamp, which applies a pressing force to the shaft 25 by raising the lever 261, thereby clamping the drill chuck 2.
1 to the right in the figure. Of course.

This moving distance is set to such an extent that the gear 23 does not become disengaged from the gear 42. A coil spring 27 is installed between the gear 23 and the bearing 24 so as not to hinder the rotation of the gear 23.
is provided so that when the lever 261 is pushed down and the pressing force on the shaft 25 is removed, the drill chuck 21 is returned to its original position together with the gear 23 and the shaft 25. Still 31
32 is a tension motor for applying a predetermined tension to the tungsten wire 10, 33.33' is a clamp, and 34.34' is a guide. 41 is a brake motor for driving the drill chuck 21.21' via gears 42.42' and 23.23'; 43 is a shaft; and 44 is a bearing.

To explain the manufacturing process, first, with the lever 261 depressed, the tungsten wire 10 is pulled out from the drum 31 attached to the tension motor 32, and the clamp 33. The hook 22 is pulled through the guide 34 in the direction of the rotation axis away from the hook 22. This tungsten wire 10 is hung on the hook 22' on the opposite side, stretched so as not to slacken, and the remaining folded part is rotated once around the tungsten wire 10, and then passed through the id 34' and the clamp 33'.
hold it. Note that the intersection angle between the tungsten wire 10 between the hooks 22 and 22' and the tungsten wire at the folded portion is preferably 90°. When the power switch is turned on in this way, the tension motor 32 and the brake motor 41 are energized, and the tension motor 32 is connected to the tungsten wire 10.
Since a driving force is generated in the direction of unwinding the tungsten wire 10, a certain tension is applied to the tungsten wire 10. On the other hand, the brake motor 41 causes the shifter 22.22' to rotate at four revolutions.
The tungsten wire 10 between the hooks 22 and 22' rotates in the same direction, thereby causing the tungsten wire 10 between the hooks 22 and 22' to
will be wound around the core. The number of turns is 2, for example, by detecting the number of rotations at the end of the shaft 25 and driving the tension motor 32. By controlling the stop of the brake motor 41, coiling is performed with a predetermined number of turns.

After this, the rest of the folded portion of the tungsten wire that is not coiled is cut off. Furthermore, the lever 261 of the clamp 26
When the drill chuck 21 is raised, the drill chuck 21 moves to the right, and the tungsten wire 10 between the hooks 22 and 22' becomes loosened and can be easily removed. In this way, the part that hung on the hook 22, 22' becomes a loop whose diameter is the diameter of the hook.

A wire with a loop as shown in FIG. The heater wire can be obtained in the same manner.

The drill chuck 21 and 21' are the brake motor 4.
1, no unnecessary rotation occurs when the tungsten wire IO reaches seven strokes. In addition, on the hook 22' side, the folded portion is wound once around the tungsten wire 10, so that the tension motor 32 is
This makes it possible to sufficiently compensate for the tension applied to the tungsten wire 10, so that the tungsten wire 10
There is no such thing as being rewound to number 1. Similarly, the biasing force of the coil spring 27 is made larger than the tensile force applied to the drill chuck 21 via the tungsten wire 10. Furthermore, the tungsten wire 10 by clamp 34, 34'
Needless to say, the holding force for the folded portion of the hooks 22 and 22' should be such that the wire can be fed as the tungsten wire 10 is coiled between the hooks 22 and 22'. The distance between the hooks 22 and 22' during the coiling process and the tension applied to the tungsten wire 10 are made to be the same as the distance between the hooks and the tension applied after the wire 1 is set inside the electronic copying machine. Of course, this prevents the wire 1 from becoming loose during setting.

FIG. 3 is a side view of the device of FIG. 2;

Here, as a means for controlling the number of turns of the coiling when forming a loop, a reflecting part 281 is provided in a part of the nut/indexing part 28 to constitute a rotation sensor using light, and a light source and a reflecting part are provided on the surface plate 20. A light detection section 29 is provided. Further, a control unit 45 including a counter for counting the number of times of detection of reflected light is provided, and a tension motor (not shown),
The timing at which the brake motor 41 stops is controlled.

As is clear from the above description, the manufacturing method according to the present invention is to attach a tungsten wire, that is, a wire to a hook 22.22'.
All you have to do is set the hook to hold it with the clamps 33 and 33', and the coiling to form the loop is done automatically, making the process very easy. The result is a wire with a stable loop that does not fluctuate over a long period of time even under low temperatures. Of course 2
The present invention is not limited to the embodiments.2For example, the drill chuck rotation drive mechanism in the apparatus shown in FIG. 2 may be configured such that the two drill chucks are driven by separate drive sources. Various other examples of means for controlling the number of turns of the coiling are also conceivable.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of a looped wire according to the present invention, and FIGS. 2 and 3 are schematic configuration diagrams of two apparatuses for carrying out the method of the present invention, viewed from above and from the side, respectively. In the figure, 1 is a wire with a loop, 20 is a surface plate, 21° 21'
is a drill chuck, and 22.22' is a hook. 23.23', 42.42' are gears, 24.24'. 44 is a bearing, 26 is a clamp, 27 is a coil spring, 29 is a light source and reflected light detection section, 32 is a tension motor, 33.33' is a clamp, and 41 is a brake motor.

Claims (1)

[Scope of Claims] 1. A looped wire characterized by having loops formed by winding the folded wire a plurality of times using the wire itself as a core wire at the folded portions at both ends of the wire. 2. Two rotating bodies having hooks are arranged at a predetermined distance on the axis of rotation, and the hooks are opposed to each other,
Hang the wire on these hooks, hold the folded part of the wire with a predetermined tension applied to the wire between the hooks, and rotate the two rotating bodies at the same rotation speed and direction to remove the wire itself. A method of manufacturing a wire having a loop corresponding to the diameter of the hook by winding the folded portion of the wire multiple times using the wire as a core wire.