JPH06117947A - Drawing tensile force measuring equipment for wire rod - Google Patents

Abstract

PURPOSE:To allow measurement of tensile force at a practical operating speed without requiring excessive draw out of wire material by providing an accumulator comprising a combination of a fixed wheel and a moving wheel. CONSTITUTION:A wire rod 110 is drawn out from a bobbin 100 and entrained about a fixed wheel 5 and a moving wheel 6 in an accumulator 3 with the interval between the wheels 5, 6 being set at minimum value. Leading end of the wire rod 110 is then fixed to a balance 15 secured to a casing 2 Subsequently, a motor 13 is rotated to wind the wire 11 around a bobbin 12 and to move the wheel 6 in the direction departing from the wheel 5. Consequently, the wire rod 110 is run through movement of the wheel 6 and drawn out from the bobbin 100. In this regard, a force identical to that for drawing out the wire rod 110 from the bobbin 100 is imparted to the balance 15 thus allowing measurement of drawing tensile force on the balance 15. This constitution ensures a draw out distance without shifting the balance 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing tension measuring device for a wire which can easily measure the drawing tension of the wire.

[0002]

2. Description of the Related Art Generally, a power cable or the like is formed by twisting a plurality of wire cores each having a conductor covered with an insulator such as polyethylene, cross-linked polyethylene or vinyl chloride to form a stranded wire,
At least the outermost layer of this stranded wire is composed of a multicore cable in which a sheath made of synthetic resin is coated. A wire core (insulated electric wire) formed by coating an insulator forming the multi-core cable is formed by extruding an insulator on a conductor and coating the conductor. Once manufactured, this insulated wire is once wound around a bobbin or the like. A multi-core cable is manufactured by twisting a plurality of insulated electric wires wound around this bobbin or the like and extruding and covering the sheath.

That is, a multicore cable is manufactured by preparing a plurality of bobbins and continuously pulling out and twisting the insulated electric wire wound from each bobbin. When manufacturing this multi-core cable, it is necessary that the insulated wire pulled out from each of the plurality of bobbins is pulled out by the same tension. Unless pulled out and twisted with the same tension, the twist is not constant and a multi-core cable with uniform twist cannot be manufactured.

Therefore, when manufacturing a multi-core cable, the pull-out tension of each bobbin of a plurality of insulated wires to be twisted is measured one by one, and the pull-out tension of each bobbin is adjusted until the pull-out tension of each bobbin becomes constant. adjust. The pulling tension of the insulated wire wound on each bobbin is measured as shown in FIG. That is, the tension of the insulated electric wire 200 wound around the bobbin 100 is measured by connecting a tensile scale 300 to the tip of the insulated electric wire 200, and holding the tensile scale 300 in a hand of a person 400 and pulling it at a predetermined speed. There is.

Although the insulated wire wound on the bobbin has been taken as an example here, the same applies to a conductor or the like as long as the wire is wound on the bobbin.

[0006]

In the conventional method of measuring the tension of the insulated electric wire 200 wound around the bobbin 100, the human 400 holds the tension scale 300 in his hand and pulls it for measurement. However, there is a problem that the drawing speed of the insulated wire 200 is not stable, and the indication value indicating the tension of the tension balance 300 attached to the tip of the insulated wire 200 does not show a constant value and moves, resulting in a large error. .

Further, in the conventional method for measuring the tension of the insulated wire 200 wound around the bobbin 100, the tension scale 300 is used.
Since the person 400 holds and pulls the measured value in the hand, the pull-out tension of the insulated electric wire 200 should always be the same, but the indication value indicating the tension of the tension scale 300 depending on the way of pulling out the insulated electric wire 200. Therefore, there is a problem that a different value is measured as the pull-out tension of the insulated wire 200 depending on the measurer.

Further, in the conventional method for measuring the tension of the insulated wire 200 wound around the bobbin 100, the tension balance 30 is used.
Since a human 400 holds and pulls 0 in his / her hand to measure 0, a space for pulling out the insulated wire 200 is required, which is not suitable for a narrow place.

Further, in the conventional method for measuring the tension of the insulated wire 200 wound around the bobbin 100, the tension scale 300 is used.
Since the human being 400 holds in his hand and pulls it, it is much slower than the speed at which the insulated wire 200 is actually pulled out, and the bobbin 1 is pulled at a speed at which the insulated wire 200 is actually pulled out.
There is a problem in that the tension of the insulated wire 200 wound around 00 cannot be measured.

According to the present invention, without pulling out the wire for a long time,
A stable wire drawing speed can be obtained, the insulated wire can be pulled out from the bobbin at the actual usage speed, and the tension of the wire wound on the bobbin can be measured, and the accurate drawing tension of the wire can be measured. It is an object of the present invention to provide a pull-out tension measuring device.

[0011]

In order to achieve the above object, a wire rod drawing tension measuring apparatus of the present invention is an accumulator comprising a fixed wheel and a moving wheel in combination, and a moving wheel of the accumulator in a predetermined direction. And a scale that attaches the end of the wire suspended on the accumulator and measures the pull-out tension of the wire generated when the moving wheel of the accumulator is moved in a predetermined direction.

Then, it is preferable that the accumulator is housed in a casing and the scale is fixed to an appropriate portion of the casing.

Further, it is preferable that casters are provided at the lower end of the casing so that the casters can be moved appropriately as needed.

[0014]

Function: The drawing tension measuring device for the wire is moved in front of the bobbin to measure the drawing tension by using the caster. Then, the tip of the wire wound on the bobbin is pulled out from this bobbin and suspended on the fixed wheel and the moving wheel of the accumulator in which the distance between the fixed wheel and the moving wheel is minimized. The tips of the wire rods alternately suspended by the fixed wheel and the moving wheel are attached to a scale fixed to the casing. After that, the moving wheel is moved in a direction away from the fixed wheel. Then, the wire rod is pulled and pulled out by the movement of the moving wheel. At this time, since the tip of the wire rod is fixed to the scale and the tip of the wire rod cannot move, the wire rod wound on the bobbin is pulled out from the bobbin. When this wire rod is pulled out from the bobbin, the same force as the force to pull out the wire rod wound on the bobbin is applied to the scale, and the pull-out tension is measured by this scale.

[0015]

EXAMPLES Examples of the present invention will be described below. FIG. 1 shows an embodiment of the drawing tension measuring device for a wire according to the present invention.

In the figure, reference numeral 1 is a wire rod drawing tension measuring device for measuring the drawing tension of a wire rod 110 wound around a bobbin 100. Reference numeral 2 denotes a casing in which the accumulator 3 and the moving means 4 are housed. The accumulator 3 stores the wire rod 110 and is composed of a fixed wheel 5 and a moving wheel 6. As shown in FIG. 2, the fixed wheel 5 is constructed by fixing a plurality of pulleys 8 to a shaft 7 at predetermined intervals. In addition, the moving wheel 6 is configured by fixing a plurality of pulleys 10 to a shaft 9 at predetermined intervals as shown in FIG. The moving means 4 is connected to the shaft 9.

The moving means 4 moves the moving wheel 6 up and down as shown by an arrow A in FIG. A wire 11 is fixed to the shaft 9. A winding body 12 has a function of winding the wire 11. The winding body 12 is axially supported by a rotation shaft of a motor 13, and is configured to rotate by the rotation of the motor 13 and wind the wire 11. This motor 13 is shown in FIG.
When it is rotated as shown by arrow B in FIG. 2, the wire 11 is wound around the winding body 12 and the shaft 9 is pulled down as shown by arrow C in FIG. By lowering the shaft 9, the moving wheel 6 is lowered as shown by an arrow D in FIG. When the moving wheel 6 is pulled down in this way, the wire rod 110 suspended between the fixed wheel 5 and the moving wheel 6 moves as shown by the arrow E in FIG. Reference numeral 14 is a roller for converting the moving direction of the wire 11 by 90 °. A scale 15 is fixed to the upper end of the casing 2. This scale 15 is used when the wire rod 110 wound on the bobbin 100 is pulled out.
It is to measure the pull-out tension applied to zero. This scale 1
5 is the same as the conventional tensile balance. This scale 15
The wire rod 110 wound around the bobbin 100 is mounted on the fixed wheel 5 and the moving wheel 6 after being suspended from the fixed wheel 5.

Numeral 16 is a caster which is attached to each corner (four corners) of the lower end of the casing 2. The caster 16 is for moving the casing 2 to the front of the bobbin 100 for which the tension is to be extracted and to be measured.

With this structure, the wire rod 1 is placed in front of the bobbin 100 to measure the pull-out tension.
The pull-out tension measuring device 1 of 10 is moved by using the caster 16. And this bobbin 100 to bobbin 10
The tip of the wire 110 wound around 0 is pulled out and suspended on the fixed wheel 5 and the movable wheel 6 of the accumulator 3 in which the distance between the fixed wheel 5 and the movable wheel 6 is minimized. The tip end of the wire rod 110 alternately suspended by the fixed wheel 5 and the moving wheel 6 is attached to the scale 15 fixed to the casing 2. Then, as shown by the arrow A in FIG. 1, the moving wheel 6 is moved in a direction away from the fixed wheel 5. Then, the wire rod 110 suspended by the moving wheel 6 travels as the moving wheel 6 moves, as shown by an arrow F in FIG. At this time, the wire rod 110 is
Since the tip portion is fixed to the scale 15 and the tip portion of the wire rod 110 cannot move, the wire rod 11 wound around the bobbin 100
0 is pulled out from the bobbin 100 as shown by an arrow G in FIG. When the wire rod 110 is pulled out from the bobbin 100, the wire rod 110 wound around the bobbin 100
The scale 15 has the same force as the force for pulling out, and the pull-out tension is measured by the scale 15.

Therefore, according to the present embodiment, since the wire rod 110 is pulled out by using the accumulator 3, the pulling distance can be secured without moving the measuring instrument (scale).

The wire rod 110 is pulled out by moving the moving wheel 6.
Is driven at a stable speed by the combination of the motor 13 and the gear, so that the error due to the speed variation is almost eliminated. Further, the measurement speed can be freely changed by changing the gear. Since the measuring scale is fixed, there is no misreading.

[0022]

Since the present invention is constructed as described above, it has the following effects.

An accumulator comprising a combination of a fixed wheel and a moving wheel, a moving means for moving the moving wheel of the accumulator in a predetermined direction, and an end of a wire rod suspended on the accumulator are attached to the moving wheel of the accumulator. Since it is composed of a scale that measures the pulling tension of the wire rod that occurs when it moves in the direction, a stable wire pulling speed can be obtained without pulling the wire rod out for a long time, and the insulated wire can be removed from the bobbin at the actual usage speed. The tension of the wire rod pulled out and wound on the bobbin can be measured, and the accurate pull-out tension of the wire rod can be measured. Further, since the accumulator is housed in the casing and the scale is fixed to an appropriate place of this casing, it can be compacted as a whole.

Further, since the caster is provided at the lower end of the casing, it can be freely moved to a necessary place as needed.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a drawing tension measuring device for a wire according to the present invention.

FIG. 2 is a detailed explanatory view of the accumulator shown in FIG.

FIG. 3 is a diagram showing a conventional tension measuring method for a wire wound on a bobbin.

[Explanation of symbols]

1 ………………………………………………………………………………………………………………………………………………………………………………………… Casing 3 ………………………………………………………… Accumulator 4 ………………………………………………………… Movement 5… …………………………………………………… Fixed wheel 6 ………………………………………………………… Movement wheel 15 ………… ………………………………………………… Scale 16 …………………………………………………… Caster 100 ………………………… ……………………………… Bobbin 110 …………………………………………………… Wire rod

Claims (3)

[Claims] 1. An accumulator comprising a combination of a fixed wheel and a moving wheel, a moving means for moving the moving wheel of the accumulator in a predetermined direction, and an end portion of a wire rod suspended on the accumulator attached to the moving wheel of the accumulator. An apparatus for measuring the tension of drawing a wire rod, comprising: a scale for measuring the drawing tension of the wire rod generated when the wire is moved in a predetermined direction. 2. The drawing tension measuring device for a wire according to claim 1, wherein the accumulator is housed in a casing, and the scale is fixed to an appropriate portion of the casing. 3. The drawing tension measuring device for a wire according to claim 2, wherein a caster is provided at a lower end portion of the casing so that the casing can be appropriately moved.